From a4236c375ddf78258a8f9252c1d79c665aa4f88b Mon Sep 17 00:00:00 2001
From: Lucendio <github+dev@lucendio.com>
Date: Mon, 25 Oct 2021 21:31:07 +0200
Subject: Add module 'write-files-deferred' executed in stage 'final' (#916)

The main idea is to introduce a second module that takes care of
writing files, but in the 'final' stage.

While the introduction of a second module would allow for choosing
the appropriate place withing the order of modules (and stages),
there is no addition top-level directive being added to the cloud
configuration schema. Instead, 'write-files' schema is being extended
to include a 'defer' attribute used only by the 'write-deffered-files'
modules.

The new module 'write-deferred-files' reuses as much as
possible of the 'write-files' functionality.
---
 cloudinit/config/cc_write_files_deferred.py | 55 +++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 cloudinit/config/cc_write_files_deferred.py

(limited to 'cloudinit/config/cc_write_files_deferred.py')

diff --git a/cloudinit/config/cc_write_files_deferred.py b/cloudinit/config/cc_write_files_deferred.py
new file mode 100644
index 00000000..0c75aa22
--- /dev/null
+++ b/cloudinit/config/cc_write_files_deferred.py
@@ -0,0 +1,55 @@
+# Copyright (C) 2021 Canonical Ltd.
+#
+# This file is part of cloud-init. See LICENSE file for license information.
+
+"""Defer writing certain files"""
+
+from textwrap import dedent
+
+from cloudinit.config.schema import validate_cloudconfig_schema
+from cloudinit import util
+from cloudinit.config.cc_write_files import (
+    schema as write_files_schema, write_files, DEFAULT_DEFER)
+
+
+schema = util.mergemanydict([
+    {
+        'id': 'cc_write_files_deferred',
+        'name': 'Write Deferred Files',
+        'title': dedent("""\
+            write certain files, whose creation as been deferred, during
+            final stage
+        """),
+        'description': dedent("""\
+            This module is based on `'Write Files' <write-files>`__, and
+            will handle all files from the write_files list, that have been
+            marked as deferred and thus are not being processed by the
+            write-files module.
+
+            *Please note that his module is not exposed to the user through
+            its own dedicated top-level directive.*
+        """)
+    },
+    write_files_schema
+])
+
+# Not exposed, because related modules should document this behaviour
+__doc__ = None
+
+
+def handle(name, cfg, _cloud, log, _args):
+    validate_cloudconfig_schema(cfg, schema)
+    file_list = cfg.get('write_files', [])
+    filtered_files = [
+        f for f in file_list if util.get_cfg_option_bool(f,
+                                                         'defer',
+                                                         DEFAULT_DEFER)
+    ]
+    if not filtered_files:
+        log.debug(("Skipping module named %s,"
+                   " no deferred file defined in configuration"), name)
+        return
+    write_files(name, filtered_files)
+
+
+# vi: ts=4 expandtab
-- 
cgit v1.2.3


From bedac77e9348e7a54c0ec364fb61df90cd893972 Mon Sep 17 00:00:00 2001
From: Brett Holman <bholman.devel@gmail.com>
Date: Mon, 6 Dec 2021 15:27:12 -0700
Subject: Add Strict Metaschema Validation (#1101)

Improve schema validation.

This adds strict validation of config module definitions at testing
time, with plumbing included for future runtime validation. This
eliminates a class of bugs resulting from schemas that have definitions
that are incorrect, but get interpreted by jsonschema as
"additionalProperties" that are therefore ignored.

- Add strict meta-schema for jsonschema unit test validation
- Separate schema from module metadata structure
- Improve type annotations for various functions and data types

Cleanup:
- Remove unused jsonschema "required" elements
- Eliminate manual memoization in schema.py:get_schema(),
        reference module.__doc__ directly
---
 cloudinit/cmd/clean.py                      |   8 +-
 cloudinit/cmd/cloud_id.py                   |   6 +-
 cloudinit/config/cc_apk_configure.py        |  11 +-
 cloudinit/config/cc_apt_configure.py        |  11 +-
 cloudinit/config/cc_bootcmd.py              |  11 +-
 cloudinit/config/cc_chef.py                 |  11 +-
 cloudinit/config/cc_install_hotplug.py      |   9 +-
 cloudinit/config/cc_locale.py               |   9 +-
 cloudinit/config/cc_ntp.py                  |  11 +-
 cloudinit/config/cc_resizefs.py             |  10 +-
 cloudinit/config/cc_runcmd.py               |  11 +-
 cloudinit/config/cc_snap.py                 |  11 +-
 cloudinit/config/cc_ubuntu_advantage.py     |  10 +-
 cloudinit/config/cc_ubuntu_drivers.py       |  10 +-
 cloudinit/config/cc_write_files.py          |  10 +-
 cloudinit/config/cc_write_files_deferred.py |  41 ++--
 cloudinit/config/cc_zypper_add_repo.py      |  10 +-
 cloudinit/config/schema.py                  | 288 ++++++++++++++++-------
 cloudinit/importer.py                       |  24 +-
 cloudinit/util.py                           |  17 +-
 doc/rtd/conf.py                             |  13 +-
 tests/unittests/cmd/test_clean.py           |   2 +-
 tests/unittests/cmd/test_cloud_id.py        |   4 +-
 tests/unittests/config/test_schema.py       | 339 ++++++++++++++++++++--------
 tests/unittests/test_cli.py                 | 105 ++++++++-
 25 files changed, 701 insertions(+), 291 deletions(-)

(limited to 'cloudinit/config/cc_write_files_deferred.py')

diff --git a/cloudinit/cmd/clean.py b/cloudinit/cmd/clean.py
index 928a8eea..3502dd56 100644
--- a/cloudinit/cmd/clean.py
+++ b/cloudinit/cmd/clean.py
@@ -11,11 +11,9 @@ import sys
 
 from cloudinit.stages import Init
 from cloudinit.subp import (ProcessExecutionError, subp)
-from cloudinit.util import (del_dir, del_file, get_config_logfiles, is_link)
-
-
-def error(msg):
-    sys.stderr.write("ERROR: " + msg + "\n")
+from cloudinit.util import (
+    del_dir, del_file, get_config_logfiles, is_link, error
+)
 
 
 def get_parser(parser=None):
diff --git a/cloudinit/cmd/cloud_id.py b/cloudinit/cmd/cloud_id.py
index 97608921..0cdc9675 100755
--- a/cloudinit/cmd/cloud_id.py
+++ b/cloudinit/cmd/cloud_id.py
@@ -6,6 +6,7 @@ import argparse
 import json
 import sys
 
+from cloudinit.util import error
 from cloudinit.sources import (
     INSTANCE_JSON_FILE, METADATA_UNKNOWN, canonical_cloud_id)
 
@@ -40,11 +41,6 @@ def get_parser(parser=None):
     return parser
 
 
-def error(msg):
-    sys.stderr.write('ERROR: %s\n' % msg)
-    return 1
-
-
 def handle_args(name, args):
     """Handle calls to 'cloud-id' cli.
 
diff --git a/cloudinit/config/cc_apk_configure.py b/cloudinit/config/cc_apk_configure.py
index 84d7a0b6..d227a58d 100644
--- a/cloudinit/config/cc_apk_configure.py
+++ b/cloudinit/config/cc_apk_configure.py
@@ -12,8 +12,7 @@ from cloudinit import log as logging
 from cloudinit import temp_utils
 from cloudinit import templater
 from cloudinit import util
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
@@ -56,7 +55,7 @@ REPOSITORIES_TEMPLATE = """\
 
 frequency = PER_INSTANCE
 distros = ['alpine']
-schema = {
+meta = {
     'id': 'cc_apk_configure',
     'name': 'APK Configure',
     'title': 'Configure apk repositories file',
@@ -95,6 +94,9 @@ schema = {
         """),
     ],
     'frequency': frequency,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'apk_repos': {
@@ -171,14 +173,13 @@ schema = {
                     """)
                 }
             },
-            'required': [],
             'minProperties': 1,  # Either preserve_repositories or alpine_repo
             'additionalProperties': False,
         }
     }
 }
 
-__doc__ = get_schema_doc(schema)
+__doc__ = get_meta_doc(meta, schema)
 
 
 def handle(name, cfg, cloud, log, _args):
diff --git a/cloudinit/config/cc_apt_configure.py b/cloudinit/config/cc_apt_configure.py
index 86d0feae..2e844c2c 100644
--- a/cloudinit/config/cc_apt_configure.py
+++ b/cloudinit/config/cc_apt_configure.py
@@ -14,8 +14,7 @@ import re
 import pathlib
 from textwrap import dedent
 
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import gpg
 from cloudinit import log as logging
 from cloudinit import subp
@@ -75,7 +74,8 @@ mirror_property = {
         }
     }
 }
-schema = {
+
+meta = {
     'id': 'cc_apt_configure',
     'name': 'Apt Configure',
     'title': 'Configure apt for the user',
@@ -155,6 +155,9 @@ schema = {
                       <key data>
                       ------END PGP PUBLIC KEY BLOCK-------""")],
     'frequency': frequency,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'apt': {
@@ -398,7 +401,7 @@ schema = {
     }
 }
 
-__doc__ = get_schema_doc(schema)
+__doc__ = get_meta_doc(meta, schema)
 
 
 # place where apt stores cached repository data
diff --git a/cloudinit/config/cc_bootcmd.py b/cloudinit/config/cc_bootcmd.py
index 246e4497..06f7a26e 100644
--- a/cloudinit/config/cc_bootcmd.py
+++ b/cloudinit/config/cc_bootcmd.py
@@ -12,8 +12,7 @@
 import os
 from textwrap import dedent
 
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_ALWAYS
 from cloudinit import temp_utils
 from cloudinit import subp
@@ -29,7 +28,7 @@ frequency = PER_ALWAYS
 
 distros = ['all']
 
-schema = {
+meta = {
     'id': 'cc_bootcmd',
     'name': 'Bootcmd',
     'title': 'Run arbitrary commands early in the boot process',
@@ -57,6 +56,9 @@ schema = {
             - [ cloud-init-per, once, mymkfs, mkfs, /dev/vdb ]
     """)],
     'frequency': PER_ALWAYS,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'bootcmd': {
@@ -69,12 +71,11 @@ schema = {
             'additionalItems': False,  # Reject items of non-string non-list
             'additionalProperties': False,
             'minItems': 1,
-            'required': [],
         }
     }
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 
 def handle(name, cfg, cloud, log, _args):
diff --git a/cloudinit/config/cc_chef.py b/cloudinit/config/cc_chef.py
index 7b20222e..ed734d1c 100644
--- a/cloudinit/config/cc_chef.py
+++ b/cloudinit/config/cc_chef.py
@@ -14,8 +14,7 @@ import os
 from textwrap import dedent
 
 from cloudinit import subp
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import templater
 from cloudinit import temp_utils
 from cloudinit import url_helper
@@ -89,7 +88,8 @@ CHEF_EXEC_DEF_ARGS = tuple(['-d', '-i', '1800', '-s', '20'])
 
 frequency = PER_ALWAYS
 distros = ["all"]
-schema = {
+
+meta = {
     'id': 'cc_chef',
     'name': 'Chef',
     'title': 'module that configures, starts and installs chef',
@@ -126,6 +126,9 @@ schema = {
           ssl_verify_mode: :verify_peer
           validation_name: yourorg-validator""")],
     'frequency': frequency,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'chef': {
@@ -357,7 +360,7 @@ schema = {
     }
 }
 
-__doc__ = get_schema_doc(schema)
+__doc__ = get_meta_doc(meta, schema)
 
 
 def post_run_chef(chef_cfg, log):
diff --git a/cloudinit/config/cc_install_hotplug.py b/cloudinit/config/cc_install_hotplug.py
index da98c409..9b4075cc 100644
--- a/cloudinit/config/cc_install_hotplug.py
+++ b/cloudinit/config/cc_install_hotplug.py
@@ -6,7 +6,7 @@ from textwrap import dedent
 from cloudinit import util
 from cloudinit import subp
 from cloudinit import stages
-from cloudinit.config.schema import get_schema_doc, validate_cloudconfig_schema
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.distros import ALL_DISTROS
 from cloudinit.event import EventType, EventScope
 from cloudinit.settings import PER_INSTANCE
@@ -15,7 +15,7 @@ from cloudinit.settings import PER_INSTANCE
 frequency = PER_INSTANCE
 distros = [ALL_DISTROS]
 
-schema = {
+meta = {
     "id": "cc_install_hotplug",
     "name": "Install Hotplug",
     "title": "Install hotplug if supported and enabled",
@@ -49,6 +49,9 @@ schema = {
         """),
     ],
     "frequency": frequency,
+}
+
+schema = {
     "type": "object",
     "properties": {
         "updates": {
@@ -81,7 +84,7 @@ schema = {
     }
 }
 
-__doc__ = get_schema_doc(schema)
+__doc__ = get_meta_doc(meta, schema)
 
 
 HOTPLUG_UDEV_PATH = "/etc/udev/rules.d/10-cloud-init-hook-hotplug.rules"
diff --git a/cloudinit/config/cc_locale.py b/cloudinit/config/cc_locale.py
index 4f8b7bf6..7fed9abd 100644
--- a/cloudinit/config/cc_locale.py
+++ b/cloudinit/config/cc_locale.py
@@ -11,13 +11,13 @@
 from textwrap import dedent
 
 from cloudinit import util
-from cloudinit.config.schema import get_schema_doc, validate_cloudconfig_schema
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 
 
 frequency = PER_INSTANCE
 distros = ['all']
-schema = {
+meta = {
     'id': 'cc_locale',
     'name': 'Locale',
     'title': 'Set system locale',
@@ -39,6 +39,9 @@ schema = {
             """),
     ],
     'frequency': frequency,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'locale': {
@@ -57,7 +60,7 @@ schema = {
     },
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 
 def handle(name, cfg, cloud, log, args):
diff --git a/cloudinit/config/cc_ntp.py b/cloudinit/config/cc_ntp.py
index c3aee798..9c085a04 100644
--- a/cloudinit/config/cc_ntp.py
+++ b/cloudinit/config/cc_ntp.py
@@ -16,7 +16,7 @@ from cloudinit import templater
 from cloudinit import type_utils
 from cloudinit import subp
 from cloudinit import util
-from cloudinit.config.schema import get_schema_doc, validate_cloudconfig_schema
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
@@ -140,7 +140,7 @@ DISTRO_CLIENT_CONFIG = {
 # configuration options before actually attempting to deploy with said
 # configuration.
 
-schema = {
+meta = {
     'id': 'cc_ntp',
     'name': 'NTP',
     'title': 'enable and configure ntp',
@@ -190,6 +190,9 @@ schema = {
             - ntp.ubuntu.com
             - 192.168.23.2""")],
     'frequency': PER_INSTANCE,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'ntp': {
@@ -289,12 +292,10 @@ schema = {
                     },
                     # Don't use REQUIRED_NTP_CONFIG_KEYS to allow for override
                     # of builtin client values.
-                    'required': [],
                     'minProperties': 1,  # If we have config, define something
                     'additionalProperties': False
                 },
             },
-            'required': [],
             'additionalProperties': False
         }
     }
@@ -303,7 +304,7 @@ REQUIRED_NTP_CONFIG_KEYS = frozenset([
     'check_exe', 'confpath', 'packages', 'service_name'])
 
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 
 def distro_ntp_client_configs(distro):
diff --git a/cloudinit/config/cc_resizefs.py b/cloudinit/config/cc_resizefs.py
index 990a6939..00bb7ae7 100644
--- a/cloudinit/config/cc_resizefs.py
+++ b/cloudinit/config/cc_resizefs.py
@@ -13,8 +13,7 @@ import os
 import stat
 from textwrap import dedent
 
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_ALWAYS
 from cloudinit import subp
 from cloudinit import util
@@ -24,7 +23,7 @@ NOBLOCK = "noblock"
 frequency = PER_ALWAYS
 distros = ['all']
 
-schema = {
+meta = {
     'id': 'cc_resizefs',
     'name': 'Resizefs',
     'title': 'Resize filesystem',
@@ -42,6 +41,9 @@ schema = {
     'examples': [
         'resize_rootfs: false  # disable root filesystem resize operation'],
     'frequency': PER_ALWAYS,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'resize_rootfs': {
@@ -52,7 +54,7 @@ schema = {
     }
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 
 def _resize_btrfs(mount_point, devpth):
diff --git a/cloudinit/config/cc_runcmd.py b/cloudinit/config/cc_runcmd.py
index 15960c7d..2f5e02cb 100644
--- a/cloudinit/config/cc_runcmd.py
+++ b/cloudinit/config/cc_runcmd.py
@@ -8,8 +8,7 @@
 
 """Runcmd: run arbitrary commands at rc.local with output to the console"""
 
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.distros import ALL_DISTROS
 from cloudinit.settings import PER_INSTANCE
 from cloudinit import util
@@ -26,7 +25,7 @@ from textwrap import dedent
 
 distros = [ALL_DISTROS]
 
-schema = {
+meta = {
     'id': 'cc_runcmd',
     'name': 'Runcmd',
     'title': 'Run arbitrary commands',
@@ -58,6 +57,9 @@ schema = {
             - [ wget, "http://example.org", -O, /tmp/index.html ]
     """)],
     'frequency': PER_INSTANCE,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'runcmd': {
@@ -71,12 +73,11 @@ schema = {
             'additionalItems': False,  # Reject items of non-string non-list
             'additionalProperties': False,
             'minItems': 1,
-            'required': [],
         }
     }
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 
 def handle(name, cfg, cloud, log, _args):
diff --git a/cloudinit/config/cc_snap.py b/cloudinit/config/cc_snap.py
index 20ed7d2f..21f30b57 100644
--- a/cloudinit/config/cc_snap.py
+++ b/cloudinit/config/cc_snap.py
@@ -8,8 +8,7 @@ import sys
 from textwrap import dedent
 
 from cloudinit import log as logging
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 from cloudinit.subp import prepend_base_command
 from cloudinit import subp
@@ -21,7 +20,7 @@ frequency = PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
-schema = {
+meta = {
     'id': 'cc_snap',
     'name': 'Snap',
     'title': 'Install, configure and manage snapd and snap packages',
@@ -103,6 +102,9 @@ schema = {
                     signed_assertion_blob_here
     """)],
     'frequency': PER_INSTANCE,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'snap': {
@@ -139,13 +141,12 @@ schema = {
                 }
             },
             'additionalProperties': False,  # Reject keys not in schema
-            'required': [],
             'minProperties': 1
         }
     }
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 SNAP_CMD = "snap"
 ASSERTIONS_FILE = "/var/lib/cloud/instance/snapd.assertions"
diff --git a/cloudinit/config/cc_ubuntu_advantage.py b/cloudinit/config/cc_ubuntu_advantage.py
index d61dc655..831a92a2 100644
--- a/cloudinit/config/cc_ubuntu_advantage.py
+++ b/cloudinit/config/cc_ubuntu_advantage.py
@@ -4,8 +4,7 @@
 
 from textwrap import dedent
 
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import log as logging
 from cloudinit.settings import PER_INSTANCE
 from cloudinit import subp
@@ -16,7 +15,7 @@ UA_URL = 'https://ubuntu.com/advantage'
 
 distros = ['ubuntu']
 
-schema = {
+meta = {
     'id': 'cc_ubuntu_advantage',
     'name': 'Ubuntu Advantage',
     'title': 'Configure Ubuntu Advantage support services',
@@ -61,6 +60,9 @@ schema = {
           - fips
         """)],
     'frequency': PER_INSTANCE,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'ubuntu_advantage': {
@@ -82,7 +84,7 @@ schema = {
     }
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 LOG = logging.getLogger(__name__)
 
diff --git a/cloudinit/config/cc_ubuntu_drivers.py b/cloudinit/config/cc_ubuntu_drivers.py
index 2d1d2b32..7f617efe 100644
--- a/cloudinit/config/cc_ubuntu_drivers.py
+++ b/cloudinit/config/cc_ubuntu_drivers.py
@@ -5,8 +5,7 @@
 import os
 from textwrap import dedent
 
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import log as logging
 from cloudinit.settings import PER_INSTANCE
 from cloudinit import subp
@@ -18,7 +17,7 @@ LOG = logging.getLogger(__name__)
 
 frequency = PER_INSTANCE
 distros = ['ubuntu']
-schema = {
+meta = {
     'id': 'cc_ubuntu_drivers',
     'name': 'Ubuntu Drivers',
     'title': 'Interact with third party drivers in Ubuntu.',
@@ -32,6 +31,9 @@ schema = {
             license-accepted: true
         """)],
     'frequency': frequency,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'drivers': {
@@ -64,7 +66,7 @@ schema = {
 OLD_UBUNTU_DRIVERS_STDERR_NEEDLE = (
     "ubuntu-drivers: error: argument <command>: invalid choice: 'install'")
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 
 # Use a debconf template to configure a global debconf variable
diff --git a/cloudinit/config/cc_write_files.py b/cloudinit/config/cc_write_files.py
index 41c75fa2..55f8c684 100644
--- a/cloudinit/config/cc_write_files.py
+++ b/cloudinit/config/cc_write_files.py
@@ -10,8 +10,7 @@ import base64
 import os
 from textwrap import dedent
 
-from cloudinit.config.schema import (
-    get_schema_doc, validate_cloudconfig_schema)
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import log as logging
 from cloudinit.settings import PER_INSTANCE
 from cloudinit import util
@@ -38,7 +37,7 @@ supported_encoding_types = [
     'gz', 'gzip', 'gz+base64', 'gzip+base64', 'gz+b64', 'gzip+b64', 'b64',
     'base64']
 
-schema = {
+meta = {
     'id': 'cc_write_files',
     'name': 'Write Files',
     'title': 'write arbitrary files',
@@ -111,6 +110,9 @@ schema = {
           defer: true
         """)],
     'frequency': frequency,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'write_files': {
@@ -187,7 +189,7 @@ schema = {
     }
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 
 def handle(name, cfg, _cloud, log, _args):
diff --git a/cloudinit/config/cc_write_files_deferred.py b/cloudinit/config/cc_write_files_deferred.py
index 0c75aa22..4fc8659c 100644
--- a/cloudinit/config/cc_write_files_deferred.py
+++ b/cloudinit/config/cc_write_files_deferred.py
@@ -4,34 +4,31 @@
 
 """Defer writing certain files"""
 
-from textwrap import dedent
-
 from cloudinit.config.schema import validate_cloudconfig_schema
 from cloudinit import util
 from cloudinit.config.cc_write_files import (
     schema as write_files_schema, write_files, DEFAULT_DEFER)
 
+# meta is not used in this module, but it remains as code documentation
+#
+# id: cc_write_files_deferred'
+# name: 'Write Deferred Files
+# distros: ['all'],
+# frequency: PER_INSTANCE,
+# title:
+#    write certain files, whose creation as been deferred, during
+#    final stage
+# description:
+#    This module is based on `'Write Files' <write-files>`__, and
+#    will handle all files from the write_files list, that have been
+#    marked as deferred and thus are not being processed by the
+#    write-files module.
+#
+#    *Please note that his module is not exposed to the user through
+#    its own dedicated top-level directive.*
+
+schema = write_files_schema
 
-schema = util.mergemanydict([
-    {
-        'id': 'cc_write_files_deferred',
-        'name': 'Write Deferred Files',
-        'title': dedent("""\
-            write certain files, whose creation as been deferred, during
-            final stage
-        """),
-        'description': dedent("""\
-            This module is based on `'Write Files' <write-files>`__, and
-            will handle all files from the write_files list, that have been
-            marked as deferred and thus are not being processed by the
-            write-files module.
-
-            *Please note that his module is not exposed to the user through
-            its own dedicated top-level directive.*
-        """)
-    },
-    write_files_schema
-])
 
 # Not exposed, because related modules should document this behaviour
 __doc__ = None
diff --git a/cloudinit/config/cc_zypper_add_repo.py b/cloudinit/config/cc_zypper_add_repo.py
index 05855b0c..bf1638fb 100644
--- a/cloudinit/config/cc_zypper_add_repo.py
+++ b/cloudinit/config/cc_zypper_add_repo.py
@@ -9,14 +9,14 @@ import configobj
 import os
 from textwrap import dedent
 
-from cloudinit.config.schema import get_schema_doc
+from cloudinit.config.schema import get_meta_doc
 from cloudinit import log as logging
 from cloudinit.settings import PER_ALWAYS
 from cloudinit import util
 
 distros = ['opensuse', 'sles']
 
-schema = {
+meta = {
     'id': 'cc_zypper_add_repo',
     'name': 'ZypperAddRepo',
     'title': 'Configure zypper behavior and add zypper repositories',
@@ -51,6 +51,9 @@ schema = {
             # any setting in /etc/zypp/zypp.conf
     """)],
     'frequency': PER_ALWAYS,
+}
+
+schema = {
     'type': 'object',
     'properties': {
         'zypper': {
@@ -86,14 +89,13 @@ schema = {
                         /etc/zypp/zypp.conf'""")
                 }
             },
-            'required': [],
             'minProperties': 1,  # Either config or repo must be provided
             'additionalProperties': False,  # only repos and config allowed
         }
     }
 }
 
-__doc__ = get_schema_doc(schema)  # Supplement python help()
+__doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 LOG = logging.getLogger(__name__)
 
diff --git a/cloudinit/config/schema.py b/cloudinit/config/schema.py
index 456bab2c..d32b7c01 100644
--- a/cloudinit/config/schema.py
+++ b/cloudinit/config/schema.py
@@ -3,19 +3,22 @@
 
 from cloudinit.cmd.devel import read_cfg_paths
 from cloudinit import importer
-from cloudinit.util import find_modules, load_file
+from cloudinit.importer import MetaSchema
+from cloudinit.util import find_modules, load_file, error
 
 import argparse
 from collections import defaultdict
 from copy import deepcopy
+from functools import partial
 import logging
 import os
 import re
 import sys
 import yaml
 
+error = partial(error, sys_exit=True)
+
 _YAML_MAP = {True: 'true', False: 'false', None: 'null'}
-SCHEMA_UNDEFINED = b'UNDEFINED'
 CLOUD_CONFIG_HEADER = b'#cloud-config'
 SCHEMA_DOC_TMPL = """
 {name}
@@ -34,7 +37,7 @@ SCHEMA_DOC_TMPL = """
 {property_doc}
 {examples}
 """
-SCHEMA_PROPERTY_TMPL = '{prefix}**{prop_name}:** ({type}) {description}'
+SCHEMA_PROPERTY_TMPL = "{prefix}**{prop_name}:** ({prop_type}) {description}"
 SCHEMA_LIST_ITEM_TMPL = (
     '{prefix}Each item in **{prop_name}** list supports the following keys:')
 SCHEMA_EXAMPLES_HEADER = '\n**Examples**::\n\n'
@@ -72,45 +75,102 @@ def is_schema_byte_string(checker, instance):
             isinstance(instance, (bytes,)))
 
 
-def validate_cloudconfig_schema(config, schema, strict=False):
-    """Validate provided config meets the schema definition.
+def get_jsonschema_validator():
+    """Get metaschema validator and format checker
 
-    @param config: Dict of cloud configuration settings validated against
-        schema.
-    @param schema: jsonschema dict describing the supported schema definition
-       for the cloud config module (config.cc_*).
-    @param strict: Boolean, when True raise SchemaValidationErrors instead of
-       logging warnings.
+    Older versions of jsonschema require some compatibility changes.
 
-    @raises: SchemaValidationError when provided config does not validate
-        against the provided schema.
+    @returns: Tuple: (jsonschema.Validator, FormatChecker)
+    @raises: ImportError when jsonschema is not present
     """
-    try:
-        from jsonschema import Draft4Validator, FormatChecker
-        from jsonschema.validators import create, extend
-    except ImportError:
-        logging.debug(
-            'Ignoring schema validation. python-jsonschema is not present')
-        return
+    from jsonschema import Draft4Validator, FormatChecker
+    from jsonschema.validators import create
 
     # Allow for bytes to be presented as an acceptable valid value for string
     # type jsonschema attributes in cloud-init's schema.
     # This allows #cloud-config to provide valid yaml "content: !!binary | ..."
+
+    strict_metaschema = deepcopy(Draft4Validator.META_SCHEMA)
+    strict_metaschema['additionalProperties'] = False
     if hasattr(Draft4Validator, 'TYPE_CHECKER'):  # jsonschema 3.0+
         type_checker = Draft4Validator.TYPE_CHECKER.redefine(
             'string', is_schema_byte_string)
-        cloudinitValidator = extend(Draft4Validator, type_checker=type_checker)
+        cloudinitValidator = create(
+            meta_schema=strict_metaschema,
+            validators=Draft4Validator.VALIDATORS,
+            version="draft4",
+            type_checker=type_checker)
     else:  # jsonschema 2.6 workaround
         types = Draft4Validator.DEFAULT_TYPES
-        # Allow bytes as well as string (and disable a spurious
-        # unsupported-assignment-operation pylint warning which appears because
-        # this code path isn't written against the latest jsonschema).
+        # Allow bytes as well as string (and disable a spurious unsupported
+        # assignment-operation pylint warning which appears because this
+        # code path isn't written against the latest jsonschema).
         types['string'] = (str, bytes)  # pylint: disable=E1137
         cloudinitValidator = create(
-            meta_schema=Draft4Validator.META_SCHEMA,
+            meta_schema=strict_metaschema,
             validators=Draft4Validator.VALIDATORS,
             version="draft4",
             default_types=types)
+    return (cloudinitValidator, FormatChecker)
+
+
+def validate_cloudconfig_metaschema(validator, schema: dict, throw=True):
+    """Validate provided schema meets the metaschema definition. Return strict
+    Validator and FormatChecker for use in validation
+    @param validator: Draft4Validator instance used to validate the schema
+    @param schema: schema to validate
+    @param throw: Sometimes the validator and checker are required, even if
+        the schema is invalid. Toggle for whether to raise
+        SchemaValidationError or log warnings.
+
+    @raises: ImportError when jsonschema is not present
+    @raises: SchemaValidationError when the schema is invalid
+    """
+
+    from jsonschema.exceptions import SchemaError
+
+    try:
+        validator.check_schema(schema)
+    except SchemaError as err:
+        # Raise SchemaValidationError to avoid jsonschema imports at call
+        # sites
+        if throw:
+            raise SchemaValidationError(
+                schema_errors=(
+                    ('.'.join([str(p) for p in err.path]), err.message),
+                )
+            ) from err
+        logging.warning(
+            "Meta-schema validation failed, attempting to validate config "
+            "anyway: %s", err)
+
+
+def validate_cloudconfig_schema(
+    config: dict, schema: dict, strict=False, strict_metaschema=False
+):
+    """Validate provided config meets the schema definition.
+
+    @param config: Dict of cloud configuration settings validated against
+        schema. Ignored if strict_metaschema=True
+    @param schema: jsonschema dict describing the supported schema definition
+       for the cloud config module (config.cc_*).
+    @param strict: Boolean, when True raise SchemaValidationErrors instead of
+       logging warnings.
+    @param strict_metaschema: Boolean, when True validates schema using strict
+       metaschema definition at runtime (currently unused)
+
+    @raises: SchemaValidationError when provided config does not validate
+        against the provided schema.
+    """
+    try:
+        (cloudinitValidator, FormatChecker) = get_jsonschema_validator()
+        if strict_metaschema:
+            validate_cloudconfig_metaschema(
+                cloudinitValidator, schema, throw=False)
+    except ImportError:
+        logging.debug("Ignoring schema validation. jsonschema is not present")
+        return
+
     validator = cloudinitValidator(schema, format_checker=FormatChecker())
     errors = ()
     for error in sorted(validator.iter_errors(config), key=lambda e: e.path):
@@ -301,12 +361,15 @@ def _schemapath_for_cloudconfig(config, original_content):
     return schema_line_numbers
 
 
-def _get_property_type(property_dict):
-    """Return a string representing a property type from a given jsonschema."""
-    property_type = property_dict.get('type', SCHEMA_UNDEFINED)
-    if property_type == SCHEMA_UNDEFINED and property_dict.get('enum'):
+def _get_property_type(property_dict: dict) -> str:
+    """Return a string representing a property type from a given
+    jsonschema.
+    """
+    property_type = property_dict.get("type")
+    if property_type is None and property_dict.get("enum"):
         property_type = [
-            str(_YAML_MAP.get(k, k)) for k in property_dict['enum']]
+            str(_YAML_MAP.get(k, k)) for k in property_dict["enum"]
+        ]
     if isinstance(property_type, list):
         property_type = '/'.join(property_type)
     items = property_dict.get('items', {})
@@ -317,12 +380,12 @@ def _get_property_type(property_dict):
             sub_property_type += '/'
         sub_property_type += '(' + _get_property_type(sub_item) + ')'
     if sub_property_type:
-        return '{0} of {1}'.format(property_type, sub_property_type)
-    return property_type
+        return "{0} of {1}".format(property_type, sub_property_type)
+    return property_type or "UNDEFINED"
 
 
-def _parse_description(description, prefix):
-    """Parse description from the schema in a format that we can better
+def _parse_description(description, prefix) -> str:
+    """Parse description from the meta in a format that we can better
     display in our docs. This parser does three things:
 
     - Guarantee that a paragraph will be in a single line
@@ -330,7 +393,7 @@ def _parse_description(description, prefix):
       the first paragraph
     - Proper align lists of items
 
-    @param description: The original description in the schema.
+    @param description: The original description in the meta.
     @param prefix: The number of spaces used to align the current description
     """
     list_paragraph = prefix * 3
@@ -343,20 +406,24 @@ def _parse_description(description, prefix):
     return description
 
 
-def _get_property_doc(schema, prefix='    '):
+def _get_property_doc(schema: dict, prefix="    ") -> str:
     """Return restructured text describing the supported schema properties."""
     new_prefix = prefix + '    '
     properties = []
     for prop_key, prop_config in schema.get('properties', {}).items():
-        # Define prop_name and dscription for SCHEMA_PROPERTY_TMPL
+        # Define prop_name and description for SCHEMA_PROPERTY_TMPL
         description = prop_config.get('description', '')
 
-        properties.append(SCHEMA_PROPERTY_TMPL.format(
-            prefix=prefix,
-            prop_name=prop_key,
-            type=_get_property_type(prop_config),
-            description=_parse_description(description, prefix)))
-        items = prop_config.get('items')
+        # Define prop_name and description for SCHEMA_PROPERTY_TMPL
+        properties.append(
+            SCHEMA_PROPERTY_TMPL.format(
+                prefix=prefix,
+                prop_name=prop_key,
+                description=_parse_description(description, prefix),
+                prop_type=_get_property_type(prop_config),
+            )
+        )
+        items = prop_config.get("items")
         if items:
             if isinstance(items, list):
                 for item in items:
@@ -373,9 +440,9 @@ def _get_property_doc(schema, prefix='    '):
     return '\n\n'.join(properties)
 
 
-def _get_schema_examples(schema, prefix=''):
-    """Return restructured text describing the schema examples if present."""
-    examples = schema.get('examples')
+def _get_examples(meta: MetaSchema) -> str:
+    """Return restructured text describing the meta examples if present."""
+    examples = meta.get("examples")
     if not examples:
         return ''
     rst_content = SCHEMA_EXAMPLES_HEADER
@@ -390,48 +457,111 @@ def _get_schema_examples(schema, prefix=''):
     return rst_content
 
 
-def get_schema_doc(schema):
-    """Return reStructured text rendering the provided jsonschema.
+def get_meta_doc(meta: MetaSchema, schema: dict) -> str:
+    """Return reStructured text rendering the provided metadata.
 
-    @param schema: Dict of jsonschema to render.
-    @raise KeyError: If schema lacks an expected key.
+    @param meta: Dict of metadata to render.
+    @raise KeyError: If metadata lacks an expected key.
     """
-    schema_copy = deepcopy(schema)
-    schema_copy['property_doc'] = _get_property_doc(schema)
-    schema_copy['examples'] = _get_schema_examples(schema)
-    schema_copy['distros'] = ', '.join(schema['distros'])
+
+    if not meta or not schema:
+        raise ValueError("Expected meta and schema")
+    keys = set(meta.keys())
+    expected = set(
+        {
+            "id",
+            "title",
+            "examples",
+            "frequency",
+            "distros",
+            "description",
+            "name",
+        }
+    )
+    error_message = ""
+    if expected - keys:
+        error_message = "Missing expected keys in module meta: {}".format(
+            expected - keys
+        )
+    elif keys - expected:
+        error_message = (
+            "Additional unexpected keys found in module meta: {}".format(
+                keys - expected
+            )
+        )
+    if error_message:
+        raise KeyError(error_message)
+
+    # cast away type annotation
+    meta_copy = dict(deepcopy(meta))
+    meta_copy["property_doc"] = _get_property_doc(schema)
+    meta_copy["examples"] = _get_examples(meta)
+    meta_copy["distros"] = ", ".join(meta["distros"])
     # Need an underbar of the same length as the name
-    schema_copy['title_underbar'] = re.sub(r'.', '-', schema['name'])
-    return SCHEMA_DOC_TMPL.format(**schema_copy)
+    meta_copy["title_underbar"] = re.sub(r".", "-", meta["name"])
+    template = SCHEMA_DOC_TMPL.format(**meta_copy)
+    return template
+
+
+def get_modules() -> dict:
+    configs_dir = os.path.dirname(os.path.abspath(__file__))
+    return find_modules(configs_dir)
+
 
+def load_doc(requested_modules: list) -> str:
+    """Load module docstrings
 
-FULL_SCHEMA = None
+    Docstrings are generated on module load. Reduce, reuse, recycle.
+    """
+    docs = ""
+    all_modules = list(get_modules().values()) + ["all"]
+    invalid_docs = set(requested_modules).difference(set(all_modules))
+    if invalid_docs:
+        error(
+            "Invalid --docs value {}. Must be one of: {}".format(
+                list(invalid_docs), ", ".join(all_modules),
+            )
+        )
+    for mod_name in all_modules:
+        if "all" in requested_modules or mod_name in requested_modules:
+            (mod_locs, _) = importer.find_module(
+                mod_name, ["cloudinit.config"], ["schema"]
+            )
+            if mod_locs:
+                mod = importer.import_module(mod_locs[0])
+                docs += mod.__doc__ or ""
+    return docs
 
 
-def get_schema():
+def get_schema() -> dict:
     """Return jsonschema coalesced from all cc_* cloud-config module."""
-    global FULL_SCHEMA
-    if FULL_SCHEMA:
-        return FULL_SCHEMA
     full_schema = {
-        '$schema': 'http://json-schema.org/draft-04/schema#',
-        'id': 'cloud-config-schema', 'allOf': []}
-
-    configs_dir = os.path.dirname(os.path.abspath(__file__))
-    potential_handlers = find_modules(configs_dir)
-    for (_fname, mod_name) in potential_handlers.items():
-        mod_locs, _looked_locs = importer.find_module(
-            mod_name, ['cloudinit.config'], ['schema'])
+        "$schema": "http://json-schema.org/draft-04/schema#",
+        "id": "cloud-config-schema",
+        "allOf": [],
+    }
+
+    for (_, mod_name) in get_modules().items():
+        (mod_locs, _) = importer.find_module(
+            mod_name, ["cloudinit.config"], ["schema"]
+        )
         if mod_locs:
             mod = importer.import_module(mod_locs[0])
-            full_schema['allOf'].append(mod.schema)
-    FULL_SCHEMA = full_schema
+            full_schema["allOf"].append(mod.schema)
     return full_schema
 
 
-def error(message):
-    print(message, file=sys.stderr)
-    sys.exit(1)
+def get_meta() -> dict:
+    """Return metadata coalesced from all cc_* cloud-config module."""
+    full_meta = dict()
+    for (_, mod_name) in get_modules().items():
+        mod_locs, _ = importer.find_module(
+            mod_name, ["cloudinit.config"], ["meta"]
+        )
+        if mod_locs:
+            mod = importer.import_module(mod_locs[0])
+            full_meta[mod.meta["id"]] = mod.meta
+    return full_meta
 
 
 def get_parser(parser=None):
@@ -474,15 +604,7 @@ def handle_schema_args(name, args):
                 cfg_name = args.config_file
             print("Valid cloud-config:", cfg_name)
     elif args.docs:
-        schema_ids = [subschema['id'] for subschema in full_schema['allOf']]
-        schema_ids += ['all']
-        invalid_docs = set(args.docs).difference(set(schema_ids))
-        if invalid_docs:
-            error('Invalid --docs value {0}. Must be one of: {1}'.format(
-                  list(invalid_docs), ', '.join(schema_ids)))
-        for subschema in full_schema['allOf']:
-            if 'all' in args.docs or subschema['id'] in args.docs:
-                print(get_schema_doc(subschema))
+        print(load_doc(args.docs))
 
 
 def main():
diff --git a/cloudinit/importer.py b/cloudinit/importer.py
index f1194fbe..4e677af3 100644
--- a/cloudinit/importer.py
+++ b/cloudinit/importer.py
@@ -9,6 +9,27 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import sys
+import typing
+
+# annotations add value for development, but don't break old versions
+# pyver: 3.5 -> 3.8
+# pylint: disable=E1101
+if sys.version_info >= (3, 8) and hasattr(typing, "TypeDict"):
+    MetaSchema = typing.TypedDict(
+        "MetaSchema",
+        {
+            "name": str,
+            "id": str,
+            "title": str,
+            "description": str,
+            "distros": typing.List[str],
+            "examples": typing.List[str],
+            "frequency": str,
+        },
+    )
+else:
+    MetaSchema = dict
+# pylint: enable=E1101
 
 
 def import_module(module_name):
@@ -16,7 +37,8 @@ def import_module(module_name):
     return sys.modules[module_name]
 
 
-def find_module(base_name, search_paths, required_attrs=None):
+def find_module(base_name: str, search_paths, required_attrs=None) -> tuple:
+    """Finds and imports specified modules"""
     if not required_attrs:
         required_attrs = []
     # NOTE(harlowja): translate the search paths to include the base name.
diff --git a/cloudinit/util.py b/cloudinit/util.py
index 2045a6ab..1b462a38 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -347,7 +347,7 @@ def extract_usergroup(ug_pair):
     return (u, g)
 
 
-def find_modules(root_dir):
+def find_modules(root_dir) -> dict:
     entries = dict()
     for fname in glob.glob(os.path.join(root_dir, "*.py")):
         if not os.path.isfile(fname):
@@ -2751,4 +2751,19 @@ def get_proc_ppid(pid):
         ppid = int(parts[3])
     return ppid
 
+
+def error(msg, rc=1, fmt='Error:\n{}', sys_exit=False):
+    """
+    Print error to stderr and return or exit
+
+    @param msg: message to print
+    @param rc: return code (default: 1)
+    @param fmt: format string for putting message in (default: 'Error:\n {}')
+    @param sys_exit: exit when called (default: false)
+    """
+    print(fmt.format(msg), file=sys.stderr)
+    if sys_exit:
+        sys.exit(rc)
+    return rc
+
 # vi: ts=4 expandtab
diff --git a/doc/rtd/conf.py b/doc/rtd/conf.py
index 684822c2..4316b5d9 100644
--- a/doc/rtd/conf.py
+++ b/doc/rtd/conf.py
@@ -1,6 +1,8 @@
 import os
 import sys
 
+from cloudinit import version
+
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
@@ -9,8 +11,6 @@ sys.path.insert(0, os.path.abspath('../'))
 sys.path.insert(0, os.path.abspath('./'))
 sys.path.insert(0, os.path.abspath('.'))
 
-from cloudinit import version
-from cloudinit.config.schema import get_schema_doc
 
 # Supress warnings for docs that aren't used yet
 # unused_docs = [
@@ -66,12 +66,3 @@ html_theme = 'sphinx_rtd_theme'
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
 html_logo = 'static/logo.png'
-
-def generate_docstring_from_schema(app, what, name, obj, options, lines):
-    """Override module docs from schema when present."""
-    if what == 'module' and hasattr(obj, "schema"):
-        del lines[:]
-        lines.extend(get_schema_doc(obj.schema).split('\n'))
-
-def setup(app):
-    app.connect('autodoc-process-docstring', generate_docstring_from_schema)
diff --git a/tests/unittests/cmd/test_clean.py b/tests/unittests/cmd/test_clean.py
index 81fc930e..3bb0ee9b 100644
--- a/tests/unittests/cmd/test_clean.py
+++ b/tests/unittests/cmd/test_clean.py
@@ -137,7 +137,7 @@ class TestClean(CiTestCase):
                 clean.remove_artifacts, remove_logs=False)
         self.assertEqual(1, retcode)
         self.assertEqual(
-            'ERROR: Could not remove %s/dir1: oops\n' % self.artifact_dir,
+            'Error:\nCould not remove %s/dir1: oops\n' % self.artifact_dir,
             m_stderr.getvalue())
 
     def test_handle_clean_args_reboots(self):
diff --git a/tests/unittests/cmd/test_cloud_id.py b/tests/unittests/cmd/test_cloud_id.py
index 12fc80e8..9a010402 100644
--- a/tests/unittests/cmd/test_cloud_id.py
+++ b/tests/unittests/cmd/test_cloud_id.py
@@ -51,7 +51,7 @@ class TestCloudId(CiTestCase):
                     cloud_id.main()
         self.assertEqual(1, context_manager.exception.code)
         self.assertIn(
-            "ERROR: File not found '%s'" % self.instance_data,
+            "Error:\nFile not found '%s'" % self.instance_data,
             m_stderr.getvalue())
 
     def test_cloud_id_non_json_instance_data(self):
@@ -64,7 +64,7 @@ class TestCloudId(CiTestCase):
                     cloud_id.main()
         self.assertEqual(1, context_manager.exception.code)
         self.assertIn(
-            "ERROR: File '%s' is not valid json." % self.instance_data,
+            "Error:\nFile '%s' is not valid json." % self.instance_data,
             m_stderr.getvalue())
 
     def test_cloud_id_from_cloud_name_in_instance_data(self):
diff --git a/tests/unittests/config/test_schema.py b/tests/unittests/config/test_schema.py
index b01f5eea..f90e0f62 100644
--- a/tests/unittests/config/test_schema.py
+++ b/tests/unittests/config/test_schema.py
@@ -1,13 +1,10 @@
 # This file is part of cloud-init. See LICENSE file for license information.
-import cloudinit
-from cloudinit.config.schema import (
-    CLOUD_CONFIG_HEADER, SchemaValidationError, annotated_cloudconfig_file,
-    get_schema_doc, get_schema, validate_cloudconfig_file,
-    validate_cloudconfig_schema, main)
-from cloudinit.util import write_file
 
-from tests.unittests.helpers import CiTestCase, mock, skipUnlessJsonSchema
 
+import importlib
+import sys
+import inspect
+import logging
 from copy import copy
 import itertools
 import pytest
@@ -15,6 +12,63 @@ from pathlib import Path
 from textwrap import dedent
 from yaml import safe_load
 
+import cloudinit
+from cloudinit.config.schema import (
+    CLOUD_CONFIG_HEADER,
+    SchemaValidationError,
+    annotated_cloudconfig_file,
+    get_meta_doc,
+    get_schema,
+    get_jsonschema_validator,
+    validate_cloudconfig_file,
+    validate_cloudconfig_metaschema,
+    validate_cloudconfig_schema,
+    main,
+    MetaSchema,
+)
+from cloudinit.util import write_file
+from tests.unittests.helpers import CiTestCase, mock, skipUnlessJsonSchema
+
+
+def get_schemas() -> dict:
+    """Return all module schemas
+
+    Assumes that module schemas have the variable name "schema"
+    """
+    return get_module_variable("schema")
+
+
+def get_metas() -> dict:
+    """Return all module metas
+
+    Assumes that module schemas have the variable name "schema"
+    """
+    return get_module_variable("meta")
+
+
+def get_module_variable(var_name) -> dict:
+    """Inspect modules and get variable from module matching var_name"""
+    schemas = {}
+
+    files = list(Path("../../cloudinit/config/").glob("cc_*.py"))
+    modules = [mod.stem for mod in files]
+
+    for module in modules:
+        importlib.import_module("cloudinit.config.{}".format(module))
+
+    for k, v in sys.modules.items():
+        path = Path(k)
+
+        if "cloudinit.config" == path.stem and path.suffix[1:4] == "cc_":
+            module_name = path.suffix[1:]
+            members = inspect.getmembers(v)
+            schemas[module_name] = None
+            for name, value in members:
+                if name == var_name:
+                    schemas[module_name] = value
+                    break
+    return schemas
+
 
 class GetSchemaTest(CiTestCase):
 
@@ -34,25 +88,17 @@ class GetSchemaTest(CiTestCase):
                 'cc_ubuntu_advantage',
                 'cc_ubuntu_drivers',
                 'cc_write_files',
-                'cc_write_files_deferred',
                 'cc_zypper_add_repo',
                 'cc_chef',
                 'cc_install_hotplug',
             ],
-            [subschema['id'] for subschema in schema['allOf']])
-        self.assertEqual('cloud-config-schema', schema['id'])
+            [meta["id"] for meta in get_metas().values() if meta is not None],
+        )
+        self.assertEqual("cloud-config-schema", schema["id"])
         self.assertEqual(
-            'http://json-schema.org/draft-04/schema#',
-            schema['$schema'])
-        # FULL_SCHEMA is updated by the get_schema call
-        from cloudinit.config.schema import FULL_SCHEMA
-        self.assertCountEqual(['id', '$schema', 'allOf'], FULL_SCHEMA.keys())
-
-    def test_get_schema_returns_global_when_set(self):
-        """When FULL_SCHEMA global is already set, get_schema returns it."""
-        m_schema_path = 'cloudinit.config.schema.FULL_SCHEMA'
-        with mock.patch(m_schema_path, {'here': 'iam'}):
-            self.assertEqual({'here': 'iam'}, get_schema())
+            "http://json-schema.org/draft-04/schema#", schema["$schema"]
+        )
+        self.assertCountEqual(["id", "$schema", "allOf"], get_schema().keys())
 
 
 class SchemaValidationErrorTest(CiTestCase):
@@ -93,8 +139,9 @@ class ValidateCloudConfigSchemaTest(CiTestCase):
         with mock.patch.dict('sys.modules', **{'jsonschema': ImportError()}):
             validate_cloudconfig_schema({'p1': -1}, schema, strict=True)
         self.assertIn(
-            'Ignoring schema validation. python-jsonschema is not present',
-            self.logs.getvalue())
+            "Ignoring schema validation. jsonschema is not present",
+            self.logs.getvalue(),
+        )
 
     @skipUnlessJsonSchema()
     def test_validateconfig_schema_strict_raises_errors(self):
@@ -117,14 +164,48 @@ class ValidateCloudConfigSchemaTest(CiTestCase):
             "Cloud config schema errors: p1: '-1' is not a 'email'",
             str(context_mgr.exception))
 
+    @skipUnlessJsonSchema()
+    def test_validateconfig_schema_honors_formats_strict_metaschema(self):
+        """With strict True and strict_metascheam True, ensure errors on format
+        """
+        schema = {"properties": {"p1": {"type": "string", "format": "email"}}}
+        with self.assertRaises(SchemaValidationError) as context_mgr:
+            validate_cloudconfig_schema(
+                {"p1": "-1"}, schema, strict=True, strict_metaschema=True
+            )
+        self.assertEqual(
+            "Cloud config schema errors: p1: '-1' is not a 'email'",
+            str(context_mgr.exception),
+        )
+
+    @skipUnlessJsonSchema()
+    def test_validateconfig_strict_metaschema_do_not_raise_exception(self):
+        """With strict_metaschema=True, do not raise exceptions.
+
+        This flag is currently unused, but is intended for run-time validation.
+        This should warn, but not raise.
+        """
+        schema = {"properties": {"p1": {"types": "string", "format": "email"}}}
+        validate_cloudconfig_schema(
+            {"p1": "-1"}, schema, strict_metaschema=True
+        )
+        assert (
+            "Meta-schema validation failed, attempting to validate config"
+            in self.logs.getvalue()
+        )
+
 
 class TestCloudConfigExamples:
-    schema = get_schema()
+    schema = get_schemas()
+    metas = get_metas()
     params = [
-        (schema["id"], example)
-        for schema in schema["allOf"] for example in schema["examples"]]
+        (meta["id"], example)
+        for meta in metas.values()
+        if meta and meta.get("examples")
+        for example in meta.get("examples")
+    ]
 
-    @pytest.mark.parametrize("schema_id,example", params)
+    @pytest.mark.parametrize("schema_id, example", params)
     @skipUnlessJsonSchema()
     def test_validateconfig_schema_of_example(self, schema_id, example):
         """ For a given example in a config module we test if it is valid
@@ -201,22 +282,42 @@ class ValidateCloudConfigFileTest(CiTestCase):
 
 
 class GetSchemaDocTest(CiTestCase):
-    """Tests for get_schema_doc."""
+    """Tests for get_meta_doc."""
 
     def setUp(self):
         super(GetSchemaDocTest, self).setUp()
         self.required_schema = {
-            'title': 'title', 'description': 'description', 'id': 'id',
-            'name': 'name', 'frequency': 'frequency',
-            'distros': ['debian', 'rhel']}
+            "title": "title",
+            "description": "description",
+            "id": "id",
+            "name": "name",
+            "frequency": "frequency",
+            "distros": ["debian", "rhel"],
+        }
+        self.meta = MetaSchema(
+            {
+                "title": "title",
+                "description": "description",
+                "id": "id",
+                "name": "name",
+                "frequency": "frequency",
+                "distros": ["debian", "rhel"],
+                "examples": [
+                    'ex1:\n    [don\'t, expand, "this"]',
+                    "ex2: true",
+                ],
+            }
+        )
 
-    def test_get_schema_doc_returns_restructured_text(self):
-        """get_schema_doc returns restructured text for a cloudinit schema."""
+    def test_get_meta_doc_returns_restructured_text(self):
+        """get_meta_doc returns restructured text for a cloudinit schema."""
         full_schema = copy(self.required_schema)
         full_schema.update(
             {'properties': {
                 'prop1': {'type': 'array', 'description': 'prop-description',
                           'items': {'type': 'integer'}}}})
+
+        doc = get_meta_doc(self.meta, full_schema)
         self.assertEqual(
             dedent("""
                 name
@@ -232,47 +333,51 @@ class GetSchemaDocTest(CiTestCase):
                 **Supported distros:** debian, rhel
 
                 **Config schema**:
-                    **prop1:** (array of integer) prop-description\n\n"""),
-            get_schema_doc(full_schema))
+                    **prop1:** (array of integer) prop-description
 
-    def test_get_schema_doc_handles_multiple_types(self):
-        """get_schema_doc delimits multiple property types with a '/'."""
-        full_schema = copy(self.required_schema)
-        full_schema.update(
-            {'properties': {
-                'prop1': {'type': ['string', 'integer'],
-                          'description': 'prop-description'}}})
+                **Examples**::
+
+                    ex1:
+                        [don't, expand, "this"]
+                    # --- Example2 ---
+                    ex2: true
+            """),
+            doc,
+        )
+
+    def test_get_meta_doc_handles_multiple_types(self):
+        """get_meta_doc delimits multiple property types with a '/'."""
+        schema = {"properties": {"prop1": {"type": ["string", "integer"]}}}
         self.assertIn(
-            '**prop1:** (string/integer) prop-description',
-            get_schema_doc(full_schema))
+            "**prop1:** (string/integer)", get_meta_doc(self.meta, schema)
+        )
 
-    def test_get_schema_doc_handles_enum_types(self):
-        """get_schema_doc converts enum types to yaml and delimits with '/'."""
-        full_schema = copy(self.required_schema)
-        full_schema.update(
-            {'properties': {
-                'prop1': {'enum': [True, False, 'stuff'],
-                          'description': 'prop-description'}}})
+    def test_get_meta_doc_handles_enum_types(self):
+        """get_meta_doc converts enum types to yaml and delimits with '/'."""
+        schema = {"properties": {"prop1": {"enum": [True, False, "stuff"]}}}
         self.assertIn(
-            '**prop1:** (true/false/stuff) prop-description',
-            get_schema_doc(full_schema))
+            "**prop1:** (true/false/stuff)", get_meta_doc(self.meta, schema)
+        )
 
-    def test_get_schema_doc_handles_nested_oneof_property_types(self):
-        """get_schema_doc describes array items oneOf declarations in type."""
-        full_schema = copy(self.required_schema)
-        full_schema.update(
-            {'properties': {
-                'prop1': {'type': 'array',
-                          'items': {
-                              'oneOf': [{'type': 'string'},
-                                        {'type': 'integer'}]},
-                          'description': 'prop-description'}}})
+    def test_get_meta_doc_handles_nested_oneof_property_types(self):
+        """get_meta_doc describes array items oneOf declarations in type."""
+        schema = {
+            "properties": {
+                "prop1": {
+                    "type": "array",
+                    "items": {
+                        "oneOf": [{"type": "string"}, {"type": "integer"}]
+                    },
+                }
+            }
+        }
         self.assertIn(
-            '**prop1:** (array of (string)/(integer)) prop-description',
-            get_schema_doc(full_schema))
+            "**prop1:** (array of (string)/(integer))",
+            get_meta_doc(self.meta, schema),
+        )
 
-    def test_get_schema_doc_handles_string_examples(self):
-        """get_schema_doc properly indented examples as a list of strings."""
+    def test_get_meta_doc_handles_string_examples(self):
+        """get_meta_doc properly indented examples as a list of strings."""
         full_schema = copy(self.required_schema)
         full_schema.update(
             {'examples': ['ex1:\n    [don\'t, expand, "this"]', 'ex2: true'],
@@ -291,16 +396,17 @@ class GetSchemaDocTest(CiTestCase):
                     # --- Example2 ---
                     ex2: true
             """),
-            get_schema_doc(full_schema))
+            get_meta_doc(self.meta, full_schema),
+        )
 
-    def test_get_schema_doc_properly_parse_description(self):
-        """get_schema_doc description properly formatted"""
-        full_schema = copy(self.required_schema)
-        full_schema.update(
-            {'properties': {
-                'p1': {
-                    'type': 'string',
-                    'description': dedent("""\
+    def test_get_meta_doc_properly_parse_description(self):
+        """get_meta_doc description properly formatted"""
+        schema = {
+            "properties": {
+                "p1": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         This item
                         has the
                         following options:
@@ -312,8 +418,8 @@ class GetSchemaDocTest(CiTestCase):
                         The default value is
                         option1""")
                 }
-            }}
-        )
+            }
+        }
 
         self.assertIn(
             dedent("""
@@ -325,16 +431,28 @@ class GetSchemaDocTest(CiTestCase):
                             - option3
 
                     The default value is option1
+
             """),
-            get_schema_doc(full_schema))
+            get_meta_doc(self.meta, schema),
+        )
 
-    def test_get_schema_doc_raises_key_errors(self):
-        """get_schema_doc raises KeyErrors on missing keys."""
-        for key in self.required_schema:
-            invalid_schema = copy(self.required_schema)
-            invalid_schema.pop(key)
+    def test_get_meta_doc_raises_key_errors(self):
+        """get_meta_doc raises KeyErrors on missing keys."""
+        schema = {
+            "properties": {
+                "prop1": {
+                    "type": "array",
+                    "items": {
+                        "oneOf": [{"type": "string"}, {"type": "integer"}]
+                    },
+                }
+            }
+        }
+        for key in self.meta:
+            invalid_meta = copy(self.meta)
+            invalid_meta.pop(key)
             with self.assertRaises(KeyError) as context_mgr:
-                get_schema_doc(invalid_schema)
+                get_meta_doc(invalid_meta, schema)
             self.assertIn(key, str(context_mgr.exception))
 
 
@@ -418,6 +536,7 @@ class TestMain:
 
         _out, err = capsys.readouterr()
         expected = (
+            'Error:\n'
             'Expected one of --config-file, --system or --docs arguments\n'
         )
         assert expected == err
@@ -431,6 +550,7 @@ class TestMain:
 
         _out, err = capsys.readouterr()
         expected = (
+            'Error:\n'
             'Expected one of --config-file, --system or --docs arguments\n'
         )
         assert expected == err
@@ -443,7 +563,7 @@ class TestMain:
                 main()
         assert 1 == context_manager.value.code
         _out, err = capsys.readouterr()
-        assert 'Configfile NOT_A_FILE does not exist\n' == err
+        assert 'Error:\nConfigfile NOT_A_FILE does not exist\n' == err
 
     def test_main_prints_docs(self, capsys):
         """When --docs parameter is provided, main generates documentation."""
@@ -489,12 +609,13 @@ class TestMain:
         assert 1 == context_manager.value.code
         _out, err = capsys.readouterr()
         expected = (
-            'Unable to read system userdata as non-root user. Try using sudo\n'
+            'Error:\nUnable to read system userdata as non-root user. '
+            'Try using sudo\n'
         )
         assert expected == err
 
 
-def _get_schema_doc_examples():
+def _get_meta_doc_examples():
     examples_dir = Path(
         cloudinit.__file__).parent.parent / 'doc' / 'examples'
     assert examples_dir.is_dir()
@@ -507,9 +628,49 @@ def _get_schema_doc_examples():
 class TestSchemaDocExamples:
     schema = get_schema()
 
-    @pytest.mark.parametrize("example_path", _get_schema_doc_examples())
+    @pytest.mark.parametrize("example_path", _get_meta_doc_examples())
     @skipUnlessJsonSchema()
     def test_schema_doc_examples(self, example_path):
         validate_cloudconfig_file(str(example_path), self.schema)
 
+
+class TestStrictMetaschema:
+    """Validate that schemas follow a stricter metaschema definition than
+    the default. This disallows arbitrary key/value pairs.
+    """
+
+    @skipUnlessJsonSchema()
+    def test_modules(self):
+        """Validate all modules with a stricter metaschema"""
+        (validator, _) = get_jsonschema_validator()
+        for (name, value) in get_schemas().items():
+            if value:
+                validate_cloudconfig_metaschema(validator, value)
+            else:
+                logging.warning("module %s has no schema definition", name)
+
+    @skipUnlessJsonSchema()
+    def test_validate_bad_module(self):
+        """Throw exception by default, don't throw if throw=False
+
+        item should be 'items' and is therefore interpreted as an additional
+        property which is invalid with a strict metaschema
+        """
+        (validator, _) = get_jsonschema_validator()
+        schema = {
+            "type": "array",
+            "item": {
+                "type": "object",
+            },
+        }
+        with pytest.raises(
+            SchemaValidationError,
+            match=(r"Additional properties are not allowed.*")
+        ):
+
+            validate_cloudconfig_metaschema(validator, schema)
+
+        validate_cloudconfig_metaschema(validator, schema, throw=False)
+
+
 # vi: ts=4 expandtab syntax=python
diff --git a/tests/unittests/test_cli.py b/tests/unittests/test_cli.py
index fd717f34..d0162673 100644
--- a/tests/unittests/test_cli.py
+++ b/tests/unittests/test_cli.py
@@ -1,6 +1,7 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import os
+import contextlib
 import io
 from collections import namedtuple
 
@@ -214,26 +215,106 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
         self.assertEqual(1, exit_code)
         # Known whitebox output from schema subcommand
         self.assertEqual(
+            'Error:\n'
             'Expected one of --config-file, --system or --docs arguments\n',
             self.stderr.getvalue())
 
-    def test_wb_devel_schema_subcommand_doc_content(self):
-        """Validate that doc content is sane from known examples."""
+    def test_wb_devel_schema_subcommand_doc_all_spot_check(self):
+        """Validate that doc content has correct values from known examples.
+
+        Ensure that schema doc is returned
+        """
+
+        # Note: patchStdoutAndStderr() is convenient for reducing boilerplate,
+        # but inspecting the code for debugging is not ideal
+        # contextlib.redirect_stdout() provides similar behavior as a context
+        # manager
         stdout = io.StringIO()
-        self.patchStdoutAndStderr(stdout=stdout)
-        self._call_main(['cloud-init', 'devel', 'schema', '--docs', 'all'])
-        expected_doc_sections = [
-            '**Supported distros:** all',
-            ('**Supported distros:** almalinux, alpine, centos, cloudlinux, '
-             'debian, eurolinux, fedora, openEuler, opensuse, photon, rhel, '
-             'rocky, sles, ubuntu, virtuozzo'),
-            '**Config schema**:\n    **resize_rootfs:** (true/false/noblock)',
-            '**Examples**::\n\n    runcmd:\n        - [ ls, -l, / ]\n'
-        ]
+        with contextlib.redirect_stdout(stdout):
+            self._call_main(["cloud-init", "devel", "schema", "--docs", "all"])
+            expected_doc_sections = [
+                "**Supported distros:** all",
+                (
+                    "**Supported distros:** almalinux, alpine, centos, "
+                    "cloudlinux, debian, eurolinux, fedora, openEuler, "
+                    "opensuse, photon, rhel, rocky, sles, ubuntu, virtuozzo"
+                ),
+                "**Config schema**:\n    **resize_rootfs:** "
+                "(true/false/noblock)",
+                "**Examples**::\n\n    runcmd:\n        - [ ls, -l, / ]\n",
+            ]
+        stdout = stdout.getvalue()
+        for expected in expected_doc_sections:
+            self.assertIn(expected, stdout)
+
+    def test_wb_devel_schema_subcommand_single_spot_check(self):
+        """Validate that doc content has correct values from known example.
+
+        Validate 'all' arg
+        """
+
+        # Note: patchStdoutAndStderr() is convenient for reducing boilerplate,
+        # but inspecting the code for debugging is not ideal
+        # contextlib.redirect_stdout() provides similar behavior as a context
+        # manager
+        stdout = io.StringIO()
+        with contextlib.redirect_stdout(stdout):
+            self._call_main(
+                ["cloud-init", "devel", "schema", "--docs", "cc_runcmd"]
+            )
+            expected_doc_sections = [
+                "Runcmd\n------\n**Summary:** Run arbitrary commands"
+            ]
         stdout = stdout.getvalue()
         for expected in expected_doc_sections:
             self.assertIn(expected, stdout)
 
+    def test_wb_devel_schema_subcommand_multiple_spot_check(self):
+        """Validate that doc content has correct values from known example.
+
+        Validate single arg
+        """
+
+        stdout = io.StringIO()
+        with contextlib.redirect_stdout(stdout):
+            self._call_main(
+                [
+                    "cloud-init",
+                    "devel",
+                    "schema",
+                    "--docs",
+                    "cc_runcmd",
+                    "cc_resizefs",
+                ]
+            )
+            expected_doc_sections = [
+                "Runcmd\n------\n**Summary:** Run arbitrary commands",
+                "Resizefs\n--------\n**Summary:** Resize filesystem",
+            ]
+        stdout = stdout.getvalue()
+        for expected in expected_doc_sections:
+            self.assertIn(expected, stdout)
+
+    def test_wb_devel_schema_subcommand_bad_arg_fails(self):
+        """Validate that doc content has correct values from known example.
+
+        Validate multiple args
+        """
+
+        # Note: patchStdoutAndStderr() is convenient for reducing boilerplate,
+        # but inspecting the code for debugging is not ideal
+        # contextlib.redirect_stdout() provides similar behavior as a context
+        # manager
+        stderr = io.StringIO()
+        with contextlib.redirect_stderr(stderr):
+            self._call_main(
+                ["cloud-init", "devel", "schema", "--docs", "garbage_value"]
+            )
+            expected_doc_sections = ["Invalid --docs value"]
+        stderr = stderr.getvalue()
+        for expected in expected_doc_sections:
+            self.assertIn(expected, stderr)
+
     @mock.patch('cloudinit.cmd.main.main_single')
     def test_single_subcommand(self, m_main_single):
         """The subcommand 'single' calls main_single with valid args."""
-- 
cgit v1.2.3


From bae9b11da9ed7dd0b16fe5adeaf4774b7cc628cf Mon Sep 17 00:00:00 2001
From: James Falcon <james.falcon@canonical.com>
Date: Wed, 15 Dec 2021 20:16:38 -0600
Subject: Adopt Black and isort (SC-700) (#1157)

Applied Black and isort, fixed any linting issues, updated tox.ini
and CI.
---
 .travis.yml                                        |    4 +
 CONTRIBUTING.rst                                   |    5 +
 cloudinit/analyze/__main__.py                      |  269 +-
 cloudinit/analyze/dump.py                          |   71 +-
 cloudinit/analyze/show.py                          |  192 +-
 cloudinit/apport.py                                |  153 +-
 cloudinit/atomic_helper.py                         |   25 +-
 cloudinit/cloud.py                                 |   14 +-
 cloudinit/cmd/clean.py                             |   59 +-
 cloudinit/cmd/cloud_id.py                          |   68 +-
 cloudinit/cmd/devel/__init__.py                    |    3 +-
 cloudinit/cmd/devel/hotplug_hook.py                |  138 +-
 cloudinit/cmd/devel/logs.py                        |  120 +-
 cloudinit/cmd/devel/make_mime.py                   |   76 +-
 cloudinit/cmd/devel/net_convert.py                 |  145 +-
 cloudinit/cmd/devel/parser.py                      |   48 +-
 cloudinit/cmd/devel/render.py                      |   54 +-
 cloudinit/cmd/main.py                              |  595 ++-
 cloudinit/cmd/query.py                             |  170 +-
 cloudinit/cmd/status.py                            |  101 +-
 cloudinit/config/__init__.py                       |   20 +-
 cloudinit/config/cc_apk_configure.py               |  195 +-
 cloudinit/config/cc_apt_configure.py               |  618 +--
 cloudinit/config/cc_apt_pipelining.py              |   13 +-
 cloudinit/config/cc_bootcmd.py                     |   65 +-
 cloudinit/config/cc_byobu.py                       |   27 +-
 cloudinit/config/cc_ca_certs.py                    |   84 +-
 cloudinit/config/cc_chef.py                        |  659 +--
 cloudinit/config/cc_debug.py                       |   21 +-
 cloudinit/config/cc_disable_ec2_metadata.py        |   25 +-
 cloudinit/config/cc_disk_setup.py                  |  334 +-
 cloudinit/config/cc_emit_upstart.py                |   24 +-
 cloudinit/config/cc_fan.py                         |   34 +-
 cloudinit/config/cc_final_message.py               |   24 +-
 cloudinit/config/cc_foo.py                         |    1 +
 cloudinit/config/cc_growpart.py                    |  134 +-
 cloudinit/config/cc_grub_dpkg.py                   |   54 +-
 cloudinit/config/cc_install_hotplug.py             |   48 +-
 cloudinit/config/cc_keys_to_console.py             |   36 +-
 cloudinit/config/cc_landscape.py                   |   24 +-
 cloudinit/config/cc_locale.py                      |   51 +-
 cloudinit/config/cc_lxd.py                         |  186 +-
 cloudinit/config/cc_mcollective.py                 |   50 +-
 cloudinit/config/cc_migrator.py                    |   25 +-
 cloudinit/config/cc_mounts.py                      |  172 +-
 cloudinit/config/cc_ntp.py                         |  546 ++-
 .../config/cc_package_update_upgrade_install.py    |   30 +-
 cloudinit/config/cc_phone_home.py                  |   98 +-
 cloudinit/config/cc_power_state_change.py          |   58 +-
 cloudinit/config/cc_puppet.py                      |  194 +-
 cloudinit/config/cc_refresh_rmc_and_interface.py   |   51 +-
 cloudinit/config/cc_reset_rmc.py                   |   43 +-
 cloudinit/config/cc_resizefs.py                    |  183 +-
 cloudinit/config/cc_resolv_conf.py                 |   41 +-
 cloudinit/config/cc_rh_subscription.py             |  240 +-
 cloudinit/config/cc_rightscale_userdata.py         |   31 +-
 cloudinit/config/cc_rsyslog.py                     |   86 +-
 cloudinit/config/cc_runcmd.py                      |   70 +-
 cloudinit/config/cc_salt_minion.py                 |   69 +-
 cloudinit/config/cc_scripts_per_boot.py            |   14 +-
 cloudinit/config/cc_scripts_per_instance.py        |   14 +-
 cloudinit/config/cc_scripts_per_once.py            |   14 +-
 cloudinit/config/cc_scripts_user.py                |   12 +-
 cloudinit/config/cc_scripts_vendor.py              |   22 +-
 cloudinit/config/cc_seed_random.py                 |   41 +-
 cloudinit/config/cc_set_hostname.py                |   30 +-
 cloudinit/config/cc_set_passwords.py               |   65 +-
 cloudinit/config/cc_snap.py                        |  168 +-
 cloudinit/config/cc_spacewalk.py                   |   67 +-
 cloudinit/config/cc_ssh.py                         |  106 +-
 cloudinit/config/cc_ssh_authkey_fingerprints.py    |   73 +-
 cloudinit/config/cc_ssh_import_id.py               |   23 +-
 cloudinit/config/cc_timezone.py                    |    2 +-
 cloudinit/config/cc_ubuntu_advantage.py            |  154 +-
 cloudinit/config/cc_ubuntu_drivers.py              |  133 +-
 cloudinit/config/cc_update_etc_hosts.py            |   42 +-
 cloudinit/config/cc_update_hostname.py             |   25 +-
 cloudinit/config/cc_users_groups.py                |   39 +-
 cloudinit/config/cc_write_files.py                 |  242 +-
 cloudinit/config/cc_write_files_deferred.py        |   22 +-
 cloudinit/config/cc_yum_add_repo.py                |   65 +-
 cloudinit/config/cc_zypper_add_repo.py             |  159 +-
 cloudinit/config/schema.py                         |  239 +-
 cloudinit/cs_utils.py                              |   20 +-
 cloudinit/dhclient_hook.py                         |   21 +-
 cloudinit/distros/__init__.py                      |  420 +-
 cloudinit/distros/almalinux.py                     |    1 +
 cloudinit/distros/alpine.py                        |   45 +-
 cloudinit/distros/amazon.py                        |    1 -
 cloudinit/distros/arch.py                          |  147 +-
 cloudinit/distros/bsd.py                           |   66 +-
 cloudinit/distros/bsd_utils.py                     |   18 +-
 cloudinit/distros/centos.py                        |    1 +
 cloudinit/distros/cloudlinux.py                    |    1 +
 cloudinit/distros/debian.py                        |  168 +-
 cloudinit/distros/dragonflybsd.py                  |    2 +-
 cloudinit/distros/eurolinux.py                     |    1 +
 cloudinit/distros/fedora.py                        |    1 +
 cloudinit/distros/freebsd.py                       |   93 +-
 cloudinit/distros/gentoo.py                        |  140 +-
 cloudinit/distros/miraclelinux.py                  |    2 +
 cloudinit/distros/net_util.py                      |   68 +-
 cloudinit/distros/netbsd.py                        |   85 +-
 cloudinit/distros/networking.py                    |   13 +-
 cloudinit/distros/openEuler.py                     |    1 +
 cloudinit/distros/openbsd.py                       |   20 +-
 cloudinit/distros/opensuse.py                      |  119 +-
 cloudinit/distros/parsers/__init__.py              |    3 +-
 cloudinit/distros/parsers/hostname.py              |   24 +-
 cloudinit/distros/parsers/hosts.py                 |   24 +-
 cloudinit/distros/parsers/networkmanager_conf.py   |    6 +-
 cloudinit/distros/parsers/resolv_conf.py           |   73 +-
 cloudinit/distros/parsers/sys_conf.py              |   38 +-
 cloudinit/distros/photon.py                        |   86 +-
 cloudinit/distros/rhel.py                          |   76 +-
 cloudinit/distros/rhel_util.py                     |    4 +-
 cloudinit/distros/rocky.py                         |    1 +
 cloudinit/distros/sles.py                          |    1 +
 cloudinit/distros/ubuntu.py                        |   33 +-
 cloudinit/distros/ug_util.py                       |  106 +-
 cloudinit/distros/virtuozzo.py                     |    1 +
 cloudinit/dmi.py                                   |   68 +-
 cloudinit/ec2_utils.py                             |  165 +-
 cloudinit/event.py                                 |    8 +-
 cloudinit/filters/launch_index.py                  |   12 +-
 cloudinit/gpg.py                                   |   48 +-
 cloudinit/handlers/__init__.py                     |  152 +-
 cloudinit/handlers/boot_hook.py                    |   21 +-
 cloudinit/handlers/cloud_config.py                 |   29 +-
 cloudinit/handlers/jinja_template.py               |   87 +-
 cloudinit/handlers/shell_script.py                 |   15 +-
 cloudinit/handlers/upstart_job.py                  |   22 +-
 cloudinit/helpers.py                               |  111 +-
 cloudinit/importer.py                              |    3 +-
 cloudinit/log.py                                   |   21 +-
 cloudinit/mergers/__init__.py                      |   43 +-
 cloudinit/mergers/m_dict.py                        |   34 +-
 cloudinit/mergers/m_list.py                        |   37 +-
 cloudinit/mergers/m_str.py                         |    5 +-
 cloudinit/net/__init__.py                          |  579 ++-
 cloudinit/net/activators.py                        |   87 +-
 cloudinit/net/bsd.py                               |  112 +-
 cloudinit/net/cmdline.py                           |   97 +-
 cloudinit/net/dhcp.py                              |  194 +-
 cloudinit/net/eni.py                               |  454 +-
 cloudinit/net/freebsd.py                           |   44 +-
 cloudinit/net/netbsd.py                            |   27 +-
 cloudinit/net/netplan.py                           |  313 +-
 cloudinit/net/network_state.py                     |  734 +--
 cloudinit/net/networkd.py                          |  208 +-
 cloudinit/net/openbsd.py                           |   33 +-
 cloudinit/net/renderer.py                          |   31 +-
 cloudinit/net/renderers.py                         |   40 +-
 cloudinit/net/sysconfig.py                         |  886 ++--
 cloudinit/net/udev.py                              |   23 +-
 cloudinit/netinfo.py                               |  403 +-
 cloudinit/patcher.py                               |    9 +-
 cloudinit/registry.py                              |    4 +-
 cloudinit/reporting/__init__.py                    |    9 +-
 cloudinit/reporting/events.py                      |   97 +-
 cloudinit/reporting/handlers.py                    |  128 +-
 cloudinit/safeyaml.py                              |   25 +-
 cloudinit/serial.py                                |   25 +-
 cloudinit/settings.py                              |   82 +-
 cloudinit/signal_handler.py                        |   12 +-
 cloudinit/simpletable.py                           |   26 +-
 cloudinit/sources/DataSourceAliYun.py              |   18 +-
 cloudinit/sources/DataSourceAltCloud.py            |  113 +-
 cloudinit/sources/DataSourceAzure.py               | 1350 +++---
 cloudinit/sources/DataSourceBigstep.py             |    9 +-
 cloudinit/sources/DataSourceCloudSigma.py          |   39 +-
 cloudinit/sources/DataSourceCloudStack.py          |  135 +-
 cloudinit/sources/DataSourceConfigDrive.py         |  117 +-
 cloudinit/sources/DataSourceDigitalOcean.py        |   65 +-
 cloudinit/sources/DataSourceEc2.py                 |  461 +-
 cloudinit/sources/DataSourceExoscale.py            |  171 +-
 cloudinit/sources/DataSourceGCE.py                 |  221 +-
 cloudinit/sources/DataSourceHetzner.py             |   74 +-
 cloudinit/sources/DataSourceIBMCloud.py            |  128 +-
 cloudinit/sources/DataSourceLXD.py                 |   61 +-
 cloudinit/sources/DataSourceMAAS.py                |  180 +-
 cloudinit/sources/DataSourceNoCloud.py             |  154 +-
 cloudinit/sources/DataSourceNone.py                |   15 +-
 cloudinit/sources/DataSourceOVF.py                 |  311 +-
 cloudinit/sources/DataSourceOpenNebula.py          |  190 +-
 cloudinit/sources/DataSourceOpenStack.py           |  129 +-
 cloudinit/sources/DataSourceOracle.py              |  125 +-
 cloudinit/sources/DataSourceRbxCloud.py            |  194 +-
 cloudinit/sources/DataSourceScaleway.py            |  131 +-
 cloudinit/sources/DataSourceSmartOS.py             |  555 ++-
 cloudinit/sources/DataSourceUpCloud.py             |    7 +-
 cloudinit/sources/DataSourceVMware.py              |   13 +-
 cloudinit/sources/DataSourceVultr.py               |   86 +-
 cloudinit/sources/__init__.py                      |  385 +-
 cloudinit/sources/helpers/azure.py                 |  693 +--
 cloudinit/sources/helpers/digitalocean.py          |  195 +-
 cloudinit/sources/helpers/hetzner.py               |   15 +-
 cloudinit/sources/helpers/netlink.py               |  187 +-
 cloudinit/sources/helpers/openstack.py             |  438 +-
 cloudinit/sources/helpers/upcloud.py               |   12 +-
 cloudinit/sources/helpers/vmware/imc/boot_proto.py |    5 +-
 cloudinit/sources/helpers/vmware/imc/config.py     |   59 +-
 .../helpers/vmware/imc/config_custom_script.py     |   45 +-
 .../sources/helpers/vmware/imc/config_file.py      |    7 +-
 .../sources/helpers/vmware/imc/config_namespace.py |    1 +
 cloudinit/sources/helpers/vmware/imc/config_nic.py |   84 +-
 .../sources/helpers/vmware/imc/config_passwd.py    |   38 +-
 .../sources/helpers/vmware/imc/config_source.py    |    1 +
 .../sources/helpers/vmware/imc/guestcust_error.py  |    1 +
 .../sources/helpers/vmware/imc/guestcust_event.py  |    1 +
 .../sources/helpers/vmware/imc/guestcust_state.py  |    1 +
 .../sources/helpers/vmware/imc/guestcust_util.py   |   46 +-
 cloudinit/sources/helpers/vmware/imc/ipv4_mode.py  |   11 +-
 cloudinit/sources/helpers/vmware/imc/nic.py        |   33 +-
 cloudinit/sources/helpers/vmware/imc/nic_base.py   |   29 +-
 cloudinit/sources/helpers/vultr.py                 |  172 +-
 cloudinit/ssh_util.py                              |  172 +-
 cloudinit/stages.py                                |  649 +--
 cloudinit/subp.py                                  |  165 +-
 cloudinit/temp_utils.py                            |   20 +-
 cloudinit/templater.py                             |   96 +-
 cloudinit/type_utils.py                            |    4 +-
 cloudinit/url_helper.py                            |  273 +-
 cloudinit/user_data.py                             |  121 +-
 cloudinit/util.py                                  |  873 ++--
 cloudinit/version.py                               |    9 +-
 cloudinit/warnings.py                              |   21 +-
 conftest.py                                        |    5 +-
 doc/rtd/conf.py                                    |   30 +-
 pyproject.toml                                     |    8 +
 setup.py                                           |  263 +-
 tests/integration_tests/__init__.py                |    8 +-
 tests/integration_tests/bugs/test_gh570.py         |   13 +-
 tests/integration_tests/bugs/test_gh626.py         |   25 +-
 tests/integration_tests/bugs/test_gh632.py         |   20 +-
 tests/integration_tests/bugs/test_gh668.py         |   15 +-
 tests/integration_tests/bugs/test_gh671.py         |   35 +-
 tests/integration_tests/bugs/test_gh868.py         |    3 +-
 tests/integration_tests/bugs/test_lp1813396.py     |    3 +-
 tests/integration_tests/bugs/test_lp1835584.py     |   19 +-
 tests/integration_tests/bugs/test_lp1886531.py     |    2 -
 tests/integration_tests/bugs/test_lp1897099.py     |   13 +-
 tests/integration_tests/bugs/test_lp1898997.py     |   14 +-
 tests/integration_tests/bugs/test_lp1900837.py     |    2 +-
 tests/integration_tests/bugs/test_lp1901011.py     |   49 +-
 tests/integration_tests/bugs/test_lp1910835.py     |    1 -
 tests/integration_tests/bugs/test_lp1912844.py     |    4 +-
 tests/integration_tests/clouds.py                  |  163 +-
 tests/integration_tests/conftest.py                |  130 +-
 .../datasources/test_lxd_discovery.py              |   43 +-
 .../datasources/test_network_dependency.py         |   17 +-
 tests/integration_tests/instances.py               |   83 +-
 tests/integration_tests/integration_settings.py    |   13 +-
 tests/integration_tests/modules/test_apt.py        |   88 +-
 tests/integration_tests/modules/test_ca_certs.py   |    1 -
 tests/integration_tests/modules/test_cli.py        |    9 +-
 tests/integration_tests/modules/test_combined.py   |  155 +-
 .../modules/test_command_output.py                 |    5 +-
 tests/integration_tests/modules/test_disk_setup.py |   76 +-
 tests/integration_tests/modules/test_growpart.py   |   38 +-
 tests/integration_tests/modules/test_hotplug.py    |   55 +-
 .../modules/test_jinja_templating.py               |   11 +-
 .../modules/test_keys_to_console.py                |    9 +-
 tests/integration_tests/modules/test_lxd_bridge.py |    2 -
 .../integration_tests/modules/test_ntp_servers.py  |   30 +-
 .../modules/test_package_update_upgrade_install.py |   18 +-
 .../integration_tests/modules/test_persistence.py  |   26 +-
 .../modules/test_power_state_change.py             |   48 +-
 tests/integration_tests/modules/test_puppet.py     |    6 +-
 .../integration_tests/modules/test_set_hostname.py |   10 +-
 .../integration_tests/modules/test_set_password.py |   15 +-
 .../modules/test_ssh_auth_key_fingerprints.py      |   13 +-
 .../integration_tests/modules/test_ssh_generate.py |   16 +-
 .../modules/test_ssh_keys_provided.py              |   58 +-
 .../integration_tests/modules/test_ssh_keysfile.py |  159 +-
 .../integration_tests/modules/test_user_events.py  |   50 +-
 .../integration_tests/modules/test_users_groups.py |   21 +-
 .../modules/test_version_change.py                 |   45 +-
 .../integration_tests/modules/test_write_files.py  |   32 +-
 tests/integration_tests/test_upgrade.py            |  120 +-
 tests/integration_tests/util.py                    |   39 +-
 tests/unittests/__init__.py                        |    1 +
 tests/unittests/analyze/test_boot.py               |  135 +-
 tests/unittests/analyze/test_dump.py               |  213 +-
 tests/unittests/cmd/devel/test_hotplug_hook.py     |  162 +-
 tests/unittests/cmd/devel/test_logs.py             |  232 +-
 tests/unittests/cmd/devel/test_render.py           |  152 +-
 tests/unittests/cmd/test_clean.py                  |  179 +-
 tests/unittests/cmd/test_cloud_id.py               |   99 +-
 tests/unittests/cmd/test_main.py                   |  223 +-
 tests/unittests/cmd/test_query.py                  |  403 +-
 tests/unittests/cmd/test_status.py                 |  561 ++-
 tests/unittests/config/test_apt_conf_v1.py         |   68 +-
 .../config/test_apt_configure_sources_list_v1.py   |  131 +-
 .../config/test_apt_configure_sources_list_v3.py   |  158 +-
 tests/unittests/config/test_apt_key.py             |  117 +-
 tests/unittests/config/test_apt_source_v1.py       |  765 ++--
 tests/unittests/config/test_apt_source_v3.py       | 1220 +++--
 tests/unittests/config/test_cc_apk_configure.py    |  148 +-
 tests/unittests/config/test_cc_apt_pipelining.py   |   12 +-
 tests/unittests/config/test_cc_bootcmd.py          |  100 +-
 tests/unittests/config/test_cc_ca_certs.py         |  220 +-
 tests/unittests/config/test_cc_chef.py             |  202 +-
 tests/unittests/config/test_cc_debug.py            |   39 +-
 .../config/test_cc_disable_ec2_metadata.py         |   44 +-
 tests/unittests/config/test_cc_disk_setup.py       |  270 +-
 tests/unittests/config/test_cc_growpart.py         |  232 +-
 tests/unittests/config/test_cc_grub_dpkg.py        |  121 +-
 tests/unittests/config/test_cc_install_hotplug.py  |   58 +-
 tests/unittests/config/test_cc_keys_to_console.py  |   18 +-
 tests/unittests/config/test_cc_landscape.py        |  178 +-
 tests/unittests/config/test_cc_locale.py           |   99 +-
 tests/unittests/config/test_cc_lxd.py              |  250 +-
 tests/unittests/config/test_cc_mcollective.py      |  104 +-
 tests/unittests/config/test_cc_mounts.py           |  449 +-
 tests/unittests/config/test_cc_ntp.py              |  682 +--
 .../unittests/config/test_cc_power_state_change.py |   74 +-
 tests/unittests/config/test_cc_puppet.py           |  432 +-
 .../config/test_cc_refresh_rmc_and_interface.py    |  162 +-
 tests/unittests/config/test_cc_resizefs.py         |  436 +-
 tests/unittests/config/test_cc_resolv_conf.py      |   76 +-
 tests/unittests/config/test_cc_rh_subscription.py  |  366 +-
 tests/unittests/config/test_cc_rsyslog.py          |  112 +-
 tests/unittests/config/test_cc_runcmd.py           |   74 +-
 tests/unittests/config/test_cc_seed_random.py      |  158 +-
 tests/unittests/config/test_cc_set_hostname.py     |  185 +-
 tests/unittests/config/test_cc_set_passwords.py    |  111 +-
 tests/unittests/config/test_cc_snap.py             |  445 +-
 tests/unittests/config/test_cc_spacewalk.py        |   36 +-
 tests/unittests/config/test_cc_ssh.py              |  356 +-
 tests/unittests/config/test_cc_timezone.py         |   31 +-
 tests/unittests/config/test_cc_ubuntu_advantage.py |  311 +-
 tests/unittests/config/test_cc_ubuntu_drivers.py   |  213 +-
 tests/unittests/config/test_cc_update_etc_hosts.py |   63 +-
 tests/unittests/config/test_cc_users_groups.py     |  264 +-
 tests/unittests/config/test_cc_write_files.py      |  148 +-
 .../config/test_cc_write_files_deferred.py         |   62 +-
 tests/unittests/config/test_cc_yum_add_repo.py     |  105 +-
 tests/unittests/config/test_cc_zypper_add_repo.py  |  166 +-
 tests/unittests/config/test_schema.py              |  301 +-
 tests/unittests/distros/__init__.py                |   10 +-
 tests/unittests/distros/test_arch.py               |   50 +-
 tests/unittests/distros/test_bsd_utils.py          |   49 +-
 tests/unittests/distros/test_create_users.py       |  252 +-
 tests/unittests/distros/test_debian.py             |  155 +-
 tests/unittests/distros/test_freebsd.py            |   28 +-
 tests/unittests/distros/test_generic.py            |  300 +-
 tests/unittests/distros/test_gentoo.py             |   11 +-
 tests/unittests/distros/test_hostname.py           |   16 +-
 tests/unittests/distros/test_hosts.py              |   36 +-
 tests/unittests/distros/test_init.py               |  273 +-
 tests/unittests/distros/test_manage_service.py     |   33 +-
 tests/unittests/distros/test_netbsd.py             |   11 +-
 tests/unittests/distros/test_netconfig.py          |  605 ++-
 tests/unittests/distros/test_networking.py         |   30 +-
 tests/unittests/distros/test_opensuse.py           |    3 +-
 tests/unittests/distros/test_photon.py             |   42 +-
 tests/unittests/distros/test_resolv.py             |   55 +-
 tests/unittests/distros/test_sles.py               |    3 +-
 tests/unittests/distros/test_sysconfig.py          |   62 +-
 .../unittests/distros/test_user_data_normalize.py  |  383 +-
 tests/unittests/filters/test_launch_index.py       |   23 +-
 tests/unittests/helpers.py                         |  191 +-
 tests/unittests/net/test_dhcp.py                   |  678 +--
 tests/unittests/net/test_init.py                   | 1368 +++---
 tests/unittests/net/test_network_state.py          |   82 +-
 tests/unittests/net/test_networkd.py               |    2 +-
 tests/unittests/runs/test_merge_run.py             |   49 +-
 tests/unittests/runs/test_simple_run.py            |  132 +-
 tests/unittests/sources/helpers/test_netlink.py    |  357 +-
 tests/unittests/sources/helpers/test_openstack.py  |   51 +-
 tests/unittests/sources/test_aliyun.py             |  217 +-
 tests/unittests/sources/test_altcloud.py           |  311 +-
 tests/unittests/sources/test_azure.py              | 3174 +++++++------
 tests/unittests/sources/test_azure_helper.py       | 1138 +++--
 tests/unittests/sources/test_cloudsigma.py         |   72 +-
 tests/unittests/sources/test_cloudstack.py         |  121 +-
 tests/unittests/sources/test_common.py             |   86 +-
 tests/unittests/sources/test_configdrive.py        | 1100 +++--
 tests/unittests/sources/test_digitalocean.py       |  283 +-
 tests/unittests/sources/test_ec2.py                |  851 ++--
 tests/unittests/sources/test_exoscale.py           |  248 +-
 tests/unittests/sources/test_gce.py                |  304 +-
 tests/unittests/sources/test_hetzner.py            |   85 +-
 tests/unittests/sources/test_ibmcloud.py           |  299 +-
 tests/unittests/sources/test_init.py               |  879 ++--
 tests/unittests/sources/test_lxd.py                |  134 +-
 tests/unittests/sources/test_maas.py               |  147 +-
 tests/unittests/sources/test_nocloud.py            |  320 +-
 tests/unittests/sources/test_opennebula.py         |  888 ++--
 tests/unittests/sources/test_openstack.py          |  652 +--
 tests/unittests/sources/test_oracle.py             |  412 +-
 tests/unittests/sources/test_ovf.py                | 1053 +++--
 tests/unittests/sources/test_rbx.py                |  215 +-
 tests/unittests/sources/test_scaleway.py           |  481 +-
 tests/unittests/sources/test_smartos.py            |  956 ++--
 tests/unittests/sources/test_upcloud.py            |  161 +-
 tests/unittests/sources/test_vmware.py             |   12 +-
 tests/unittests/sources/test_vultr.py              |  375 +-
 .../unittests/sources/vmware/test_custom_script.py |   61 +-
 .../sources/vmware/test_guestcust_util.py          |   79 +-
 .../sources/vmware/test_vmware_config_file.py      |  430 +-
 tests/unittests/test__init__.py                    |  193 +-
 tests/unittests/test_atomic_helper.py              |    4 +-
 tests/unittests/test_builtin_handlers.py           |  405 +-
 tests/unittests/test_cli.py                        |  214 +-
 tests/unittests/test_conftest.py                   |   10 +-
 tests/unittests/test_cs_util.py                    |   39 +-
 tests/unittests/test_data.py                       |  526 ++-
 tests/unittests/test_dhclient_hook.py              |   89 +-
 tests/unittests/test_dmi.py                        |   90 +-
 tests/unittests/test_ds_identify.py                | 1609 ++++---
 tests/unittests/test_ec2_util.py                   |  376 +-
 tests/unittests/test_event.py                      |   16 +-
 tests/unittests/test_features.py                   |   36 +-
 tests/unittests/test_gpg.py                        |  103 +-
 tests/unittests/test_helpers.py                    |   11 +-
 tests/unittests/test_log.py                        |   12 +-
 tests/unittests/test_merging.py                    |  123 +-
 tests/unittests/test_net.py                        | 4833 ++++++++++++--------
 tests/unittests/test_net_activators.py             |  154 +-
 tests/unittests/test_net_freebsd.py                |   45 +-
 tests/unittests/test_netinfo.py                    |  193 +-
 tests/unittests/test_pathprefix2dict.py            |   28 +-
 tests/unittests/test_registry.py                   |   21 +-
 tests/unittests/test_render_cloudcfg.py            |   71 +-
 tests/unittests/test_reporting.py                  |  379 +-
 tests/unittests/test_reporting_hyperv.py           |  193 +-
 tests/unittests/test_simpletable.py                |   47 +-
 tests/unittests/test_sshutil.py                    |  817 ++--
 tests/unittests/test_stages.py                     |  444 +-
 tests/unittests/test_subp.py                       |  289 +-
 tests/unittests/test_temp_utils.py                 |  118 +-
 tests/unittests/test_templating.py                 |  103 +-
 tests/unittests/test_url_helper.py                 |  134 +-
 tests/unittests/test_util.py                       |  934 ++--
 tests/unittests/test_version.py                    |   11 +-
 tests/unittests/util.py                            |   14 +-
 tools/mock-meta.py                                 |  301 +-
 tools/validate-yaml.py                             |    4 +-
 tox.ini                                            |   28 +-
 441 files changed, 43425 insertions(+), 31496 deletions(-)
 create mode 100644 pyproject.toml

(limited to 'cloudinit/config/cc_write_files_deferred.py')

diff --git a/.travis.yml b/.travis.yml
index 9470cc31..c458db48 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -133,6 +133,10 @@ matrix:
           env: TOXENV=flake8
         - python: 3.6
           env: TOXENV=pylint
+        - python: 3.6
+          env: TOXENV=black
+        - python: 3.6
+          env: TOXENV=isort
         - python: 3.7
           env: TOXENV=doc
         # Test all supported Python versions (but at the end, so we schedule
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 06b31497..aa09c61e 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -19,6 +19,7 @@ Before any pull request can be accepted, you must do the following:
   `tools/.github-cla-signers`_
 * Add or update any `unit tests`_ accordingly
 * Add or update any `integration tests`_ (if applicable)
+* Format code (using black and isort) with `tox -e format`
 * Ensure unit tests and linting pass using `tox`_
 * Submit a PR against the `main` branch of the `cloud-init` repository
 
@@ -133,6 +134,10 @@ Do these things for each feature or bug
 
     git commit
 
+* Apply black and isort formatting rules with `tox`_::
+
+    tox -e format
+
 * Run unit tests and lint/formatting checks with `tox`_::
 
     tox
diff --git a/cloudinit/analyze/__main__.py b/cloudinit/analyze/__main__.py
index 99e5c203..36a5be78 100644
--- a/cloudinit/analyze/__main__.py
+++ b/cloudinit/analyze/__main__.py
@@ -5,62 +5,111 @@
 import argparse
 import re
 import sys
+from datetime import datetime
 
 from cloudinit.util import json_dumps
-from datetime import datetime
-from . import dump
-from . import show
+
+from . import dump, show
 
 
 def get_parser(parser=None):
     if not parser:
         parser = argparse.ArgumentParser(
-            prog='cloudinit-analyze',
-            description='Devel tool: Analyze cloud-init logs and data')
-    subparsers = parser.add_subparsers(title='Subcommands', dest='subcommand')
+            prog="cloudinit-analyze",
+            description="Devel tool: Analyze cloud-init logs and data",
+        )
+    subparsers = parser.add_subparsers(title="Subcommands", dest="subcommand")
     subparsers.required = True
 
     parser_blame = subparsers.add_parser(
-        'blame', help='Print list of executed stages ordered by time to init')
+        "blame", help="Print list of executed stages ordered by time to init"
+    )
     parser_blame.add_argument(
-        '-i', '--infile', action='store', dest='infile',
-        default='/var/log/cloud-init.log',
-        help='specify where to read input.')
+        "-i",
+        "--infile",
+        action="store",
+        dest="infile",
+        default="/var/log/cloud-init.log",
+        help="specify where to read input.",
+    )
     parser_blame.add_argument(
-        '-o', '--outfile', action='store', dest='outfile', default='-',
-        help='specify where to write output. ')
-    parser_blame.set_defaults(action=('blame', analyze_blame))
+        "-o",
+        "--outfile",
+        action="store",
+        dest="outfile",
+        default="-",
+        help="specify where to write output. ",
+    )
+    parser_blame.set_defaults(action=("blame", analyze_blame))
 
     parser_show = subparsers.add_parser(
-        'show', help='Print list of in-order events during execution')
-    parser_show.add_argument('-f', '--format', action='store',
-                             dest='print_format', default='%I%D @%Es +%ds',
-                             help='specify formatting of output.')
-    parser_show.add_argument('-i', '--infile', action='store',
-                             dest='infile', default='/var/log/cloud-init.log',
-                             help='specify where to read input.')
-    parser_show.add_argument('-o', '--outfile', action='store',
-                             dest='outfile', default='-',
-                             help='specify where to write output.')
-    parser_show.set_defaults(action=('show', analyze_show))
+        "show", help="Print list of in-order events during execution"
+    )
+    parser_show.add_argument(
+        "-f",
+        "--format",
+        action="store",
+        dest="print_format",
+        default="%I%D @%Es +%ds",
+        help="specify formatting of output.",
+    )
+    parser_show.add_argument(
+        "-i",
+        "--infile",
+        action="store",
+        dest="infile",
+        default="/var/log/cloud-init.log",
+        help="specify where to read input.",
+    )
+    parser_show.add_argument(
+        "-o",
+        "--outfile",
+        action="store",
+        dest="outfile",
+        default="-",
+        help="specify where to write output.",
+    )
+    parser_show.set_defaults(action=("show", analyze_show))
     parser_dump = subparsers.add_parser(
-        'dump', help='Dump cloud-init events in JSON format')
-    parser_dump.add_argument('-i', '--infile', action='store',
-                             dest='infile', default='/var/log/cloud-init.log',
-                             help='specify where to read input. ')
-    parser_dump.add_argument('-o', '--outfile', action='store',
-                             dest='outfile', default='-',
-                             help='specify where to write output. ')
-    parser_dump.set_defaults(action=('dump', analyze_dump))
+        "dump", help="Dump cloud-init events in JSON format"
+    )
+    parser_dump.add_argument(
+        "-i",
+        "--infile",
+        action="store",
+        dest="infile",
+        default="/var/log/cloud-init.log",
+        help="specify where to read input. ",
+    )
+    parser_dump.add_argument(
+        "-o",
+        "--outfile",
+        action="store",
+        dest="outfile",
+        default="-",
+        help="specify where to write output. ",
+    )
+    parser_dump.set_defaults(action=("dump", analyze_dump))
     parser_boot = subparsers.add_parser(
-        'boot', help='Print list of boot times for kernel and cloud-init')
-    parser_boot.add_argument('-i', '--infile', action='store',
-                             dest='infile', default='/var/log/cloud-init.log',
-                             help='specify where to read input. ')
-    parser_boot.add_argument('-o', '--outfile', action='store',
-                             dest='outfile', default='-',
-                             help='specify where to write output.')
-    parser_boot.set_defaults(action=('boot', analyze_boot))
+        "boot", help="Print list of boot times for kernel and cloud-init"
+    )
+    parser_boot.add_argument(
+        "-i",
+        "--infile",
+        action="store",
+        dest="infile",
+        default="/var/log/cloud-init.log",
+        help="specify where to read input. ",
+    )
+    parser_boot.add_argument(
+        "-o",
+        "--outfile",
+        action="store",
+        dest="outfile",
+        default="-",
+        help="specify where to write output.",
+    )
+    parser_boot.set_defaults(action=("boot", analyze_boot))
     return parser
 
 
@@ -78,61 +127,68 @@ def analyze_boot(name, args):
     """
     infh, outfh = configure_io(args)
     kernel_info = show.dist_check_timestamp()
-    status_code, kernel_start, kernel_end, ci_sysd_start = \
-        kernel_info
+    status_code, kernel_start, kernel_end, ci_sysd_start = kernel_info
     kernel_start_timestamp = datetime.utcfromtimestamp(kernel_start)
     kernel_end_timestamp = datetime.utcfromtimestamp(kernel_end)
     ci_sysd_start_timestamp = datetime.utcfromtimestamp(ci_sysd_start)
     try:
-        last_init_local = \
-            [e for e in _get_events(infh) if e['name'] == 'init-local' and
-                'starting search' in e['description']][-1]
-        ci_start = datetime.utcfromtimestamp(last_init_local['timestamp'])
+        last_init_local = [
+            e
+            for e in _get_events(infh)
+            if e["name"] == "init-local"
+            and "starting search" in e["description"]
+        ][-1]
+        ci_start = datetime.utcfromtimestamp(last_init_local["timestamp"])
     except IndexError:
-        ci_start = 'Could not find init-local log-line in cloud-init.log'
+        ci_start = "Could not find init-local log-line in cloud-init.log"
         status_code = show.FAIL_CODE
 
-    FAILURE_MSG = 'Your Linux distro or container does not support this ' \
-                  'functionality.\n' \
-                  'You must be running a Kernel Telemetry supported ' \
-                  'distro.\nPlease check ' \
-                  'https://cloudinit.readthedocs.io/en/latest' \
-                  '/topics/analyze.html for more ' \
-                  'information on supported distros.\n'
-
-    SUCCESS_MSG = '-- Most Recent Boot Record --\n' \
-                  '    Kernel Started at: {k_s_t}\n' \
-                  '    Kernel ended boot at: {k_e_t}\n' \
-                  '    Kernel time to boot (seconds): {k_r}\n' \
-                  '    Cloud-init activated by systemd at: {ci_sysd_t}\n' \
-                  '    Time between Kernel end boot and Cloud-init ' \
-                  'activation (seconds): {bt_r}\n' \
-                  '    Cloud-init start: {ci_start}\n'
-
-    CONTAINER_MSG = '-- Most Recent Container Boot Record --\n' \
-                    '    Container started at: {k_s_t}\n' \
-                    '    Cloud-init activated by systemd at: {ci_sysd_t}\n' \
-                    '    Cloud-init start: {ci_start}\n' \
-
+    FAILURE_MSG = (
+        "Your Linux distro or container does not support this "
+        "functionality.\n"
+        "You must be running a Kernel Telemetry supported "
+        "distro.\nPlease check "
+        "https://cloudinit.readthedocs.io/en/latest"
+        "/topics/analyze.html for more "
+        "information on supported distros.\n"
+    )
+
+    SUCCESS_MSG = (
+        "-- Most Recent Boot Record --\n"
+        "    Kernel Started at: {k_s_t}\n"
+        "    Kernel ended boot at: {k_e_t}\n"
+        "    Kernel time to boot (seconds): {k_r}\n"
+        "    Cloud-init activated by systemd at: {ci_sysd_t}\n"
+        "    Time between Kernel end boot and Cloud-init "
+        "activation (seconds): {bt_r}\n"
+        "    Cloud-init start: {ci_start}\n"
+    )
+
+    CONTAINER_MSG = (
+        "-- Most Recent Container Boot Record --\n"
+        "    Container started at: {k_s_t}\n"
+        "    Cloud-init activated by systemd at: {ci_sysd_t}\n"
+        "    Cloud-init start: {ci_start}\n"
+    )
     status_map = {
         show.FAIL_CODE: FAILURE_MSG,
         show.CONTAINER_CODE: CONTAINER_MSG,
-        show.SUCCESS_CODE: SUCCESS_MSG
+        show.SUCCESS_CODE: SUCCESS_MSG,
     }
 
     kernel_runtime = kernel_end - kernel_start
     between_process_runtime = ci_sysd_start - kernel_end
 
     kwargs = {
-        'k_s_t': kernel_start_timestamp,
-        'k_e_t': kernel_end_timestamp,
-        'k_r': kernel_runtime,
-        'bt_r': between_process_runtime,
-        'k_e': kernel_end,
-        'k_s': kernel_start,
-        'ci_sysd': ci_sysd_start,
-        'ci_sysd_t': ci_sysd_start_timestamp,
-        'ci_start': ci_start
+        "k_s_t": kernel_start_timestamp,
+        "k_e_t": kernel_end_timestamp,
+        "k_r": kernel_runtime,
+        "bt_r": between_process_runtime,
+        "k_e": kernel_end,
+        "k_s": kernel_start,
+        "ci_sysd": ci_sysd_start,
+        "ci_sysd_t": ci_sysd_start_timestamp,
+        "ci_start": ci_start,
     }
 
     outfh.write(status_map[status_code].format(**kwargs))
@@ -152,15 +208,16 @@ def analyze_blame(name, args):
     and sorting by record data ('delta')
     """
     (infh, outfh) = configure_io(args)
-    blame_format = '     %ds (%n)'
-    r = re.compile(r'(^\s+\d+\.\d+)', re.MULTILINE)
-    for idx, record in enumerate(show.show_events(_get_events(infh),
-                                                  blame_format)):
+    blame_format = "     %ds (%n)"
+    r = re.compile(r"(^\s+\d+\.\d+)", re.MULTILINE)
+    for idx, record in enumerate(
+        show.show_events(_get_events(infh), blame_format)
+    ):
         srecs = sorted(filter(r.match, record), reverse=True)
-        outfh.write('-- Boot Record %02d --\n' % (idx + 1))
-        outfh.write('\n'.join(srecs) + '\n')
-        outfh.write('\n')
-    outfh.write('%d boot records analyzed\n' % (idx + 1))
+        outfh.write("-- Boot Record %02d --\n" % (idx + 1))
+        outfh.write("\n".join(srecs) + "\n")
+        outfh.write("\n")
+    outfh.write("%d boot records analyzed\n" % (idx + 1))
 
 
 def analyze_show(name, args):
@@ -184,21 +241,25 @@ def analyze_show(name, args):
         Finished stage: (modules-final) 0.NNN seconds
     """
     (infh, outfh) = configure_io(args)
-    for idx, record in enumerate(show.show_events(_get_events(infh),
-                                                  args.print_format)):
-        outfh.write('-- Boot Record %02d --\n' % (idx + 1))
-        outfh.write('The total time elapsed since completing an event is'
-                    ' printed after the "@" character.\n')
-        outfh.write('The time the event takes is printed after the "+" '
-                    'character.\n\n')
-        outfh.write('\n'.join(record) + '\n')
-    outfh.write('%d boot records analyzed\n' % (idx + 1))
+    for idx, record in enumerate(
+        show.show_events(_get_events(infh), args.print_format)
+    ):
+        outfh.write("-- Boot Record %02d --\n" % (idx + 1))
+        outfh.write(
+            "The total time elapsed since completing an event is"
+            ' printed after the "@" character.\n'
+        )
+        outfh.write(
+            'The time the event takes is printed after the "+" character.\n\n'
+        )
+        outfh.write("\n".join(record) + "\n")
+    outfh.write("%d boot records analyzed\n" % (idx + 1))
 
 
 def analyze_dump(name, args):
     """Dump cloud-init events in json format"""
     (infh, outfh) = configure_io(args)
-    outfh.write(json_dumps(_get_events(infh)) + '\n')
+    outfh.write(json_dumps(_get_events(infh)) + "\n")
 
 
 def _get_events(infile):
@@ -211,28 +272,28 @@ def _get_events(infile):
 
 def configure_io(args):
     """Common parsing and setup of input/output files"""
-    if args.infile == '-':
+    if args.infile == "-":
         infh = sys.stdin
     else:
         try:
-            infh = open(args.infile, 'r')
+            infh = open(args.infile, "r")
         except OSError:
-            sys.stderr.write('Cannot open file %s\n' % args.infile)
+            sys.stderr.write("Cannot open file %s\n" % args.infile)
             sys.exit(1)
 
-    if args.outfile == '-':
+    if args.outfile == "-":
         outfh = sys.stdout
     else:
         try:
-            outfh = open(args.outfile, 'w')
+            outfh = open(args.outfile, "w")
         except OSError:
-            sys.stderr.write('Cannot open file %s\n' % args.outfile)
+            sys.stderr.write("Cannot open file %s\n" % args.outfile)
             sys.exit(1)
 
     return (infh, outfh)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     parser = get_parser()
     args = parser.parse_args()
     (name, action_functor) = args.action
diff --git a/cloudinit/analyze/dump.py b/cloudinit/analyze/dump.py
index 62ad51fe..8e6e3c6a 100644
--- a/cloudinit/analyze/dump.py
+++ b/cloudinit/analyze/dump.py
@@ -1,21 +1,20 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import calendar
-from datetime import datetime
 import sys
+from datetime import datetime
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 stage_to_description = {
-    'finished': 'finished running cloud-init',
-    'init-local': 'starting search for local datasources',
-    'init-network': 'searching for network datasources',
-    'init': 'searching for network datasources',
-    'modules-config': 'running config modules',
-    'modules-final': 'finalizing modules',
-    'modules': 'running modules for',
-    'single': 'running single module ',
+    "finished": "finished running cloud-init",
+    "init-local": "starting search for local datasources",
+    "init-network": "searching for network datasources",
+    "init": "searching for network datasources",
+    "modules-config": "running config modules",
+    "modules-final": "finalizing modules",
+    "modules": "running modules for",
+    "single": "running single module ",
 }
 
 # logger's asctime format
@@ -34,11 +33,11 @@ def parse_timestamp(timestampstr):
     if timestampstr.split()[0] in months:
         # Aug 29 22:55:26
         FMT = DEFAULT_FMT
-        if '.' in timestampstr:
+        if "." in timestampstr:
             FMT = CLOUD_INIT_JOURNALCTL_FMT
-        dt = datetime.strptime(timestampstr + " " +
-                               str(datetime.now().year),
-                               FMT)
+        dt = datetime.strptime(
+            timestampstr + " " + str(datetime.now().year), FMT
+        )
         timestamp = dt.strftime("%s.%f")
     elif "," in timestampstr:
         # 2016-09-12 14:39:20,839
@@ -52,7 +51,7 @@ def parse_timestamp(timestampstr):
 
 
 def parse_timestamp_from_date(timestampstr):
-    out, _ = subp.subp(['date', '+%s.%3N', '-d', timestampstr])
+    out, _ = subp.subp(["date", "+%s.%3N", "-d", timestampstr])
     timestamp = out.strip()
     return float(timestamp)
 
@@ -79,8 +78,8 @@ def parse_ci_logline(line):
     # Apr 30 19:39:11 cloud-init[2673]: handlers.py[DEBUG]: start: \
     #          init-local/check-cache: attempting to read from cache [check]
 
-    amazon_linux_2_sep = ' cloud-init['
-    separators = [' - ', ' [CLOUDINIT] ', amazon_linux_2_sep]
+    amazon_linux_2_sep = " cloud-init["
+    separators = [" - ", " [CLOUDINIT] ", amazon_linux_2_sep]
     found = False
     for sep in separators:
         if sep in line:
@@ -99,7 +98,7 @@ def parse_ci_logline(line):
     if "," in timehost:
         timestampstr, extra = timehost.split(",")
         timestampstr += ",%s" % extra.split()[0]
-        if ' ' in extra:
+        if " " in extra:
             hostname = extra.split()[-1]
     else:
         hostname = timehost.split()[-1]
@@ -111,11 +110,11 @@ def parse_ci_logline(line):
             eventstr = eventstr.split(maxsplit=1)[1]
         else:
             timestampstr = timehost.split(hostname)[0].strip()
-    if 'Cloud-init v.' in eventstr:
-        event_type = 'start'
-        if 'running' in eventstr:
-            stage_and_timestamp = eventstr.split('running')[1].lstrip()
-            event_name, _ = stage_and_timestamp.split(' at ')
+    if "Cloud-init v." in eventstr:
+        event_type = "start"
+        if "running" in eventstr:
+            stage_and_timestamp = eventstr.split("running")[1].lstrip()
+            event_name, _ = stage_and_timestamp.split(" at ")
             event_name = event_name.replace("'", "").replace(":", "-")
             if event_name == "init":
                 event_name = "init-network"
@@ -128,17 +127,17 @@ def parse_ci_logline(line):
         event_description = eventstr.split(event_name)[1].strip()
 
     event = {
-        'name': event_name.rstrip(":"),
-        'description': event_description,
-        'timestamp': parse_timestamp(timestampstr),
-        'origin': 'cloudinit',
-        'event_type': event_type.rstrip(":"),
+        "name": event_name.rstrip(":"),
+        "description": event_description,
+        "timestamp": parse_timestamp(timestampstr),
+        "origin": "cloudinit",
+        "event_type": event_type.rstrip(":"),
     }
-    if event['event_type'] == "finish":
+    if event["event_type"] == "finish":
         result = event_description.split(":")[0]
-        desc = event_description.split(result)[1].lstrip(':').strip()
-        event['result'] = result
-        event['description'] = desc.strip()
+        desc = event_description.split(result)[1].lstrip(":").strip()
+        event["result"] = result
+        event["description"] = desc.strip()
 
     return event
 
@@ -146,10 +145,10 @@ def parse_ci_logline(line):
 def dump_events(cisource=None, rawdata=None):
     events = []
     event = None
-    CI_EVENT_MATCHES = ['start:', 'finish:', 'Cloud-init v.']
+    CI_EVENT_MATCHES = ["start:", "finish:", "Cloud-init v."]
 
     if not any([cisource, rawdata]):
-        raise ValueError('Either cisource or rawdata parameters are required')
+        raise ValueError("Either cisource or rawdata parameters are required")
 
     if rawdata:
         data = rawdata.splitlines()
@@ -162,7 +161,7 @@ def dump_events(cisource=None, rawdata=None):
                 try:
                     event = parse_ci_logline(line)
                 except ValueError:
-                    sys.stderr.write('Skipping invalid entry\n')
+                    sys.stderr.write("Skipping invalid entry\n")
                 if event:
                     events.append(event)
 
diff --git a/cloudinit/analyze/show.py b/cloudinit/analyze/show.py
index 01a4d3e5..5fd9cdfd 100644
--- a/cloudinit/analyze/show.py
+++ b/cloudinit/analyze/show.py
@@ -8,11 +8,10 @@ import base64
 import datetime
 import json
 import os
-import time
 import sys
+import time
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from cloudinit.distros import uses_systemd
 
 # Example events:
@@ -35,24 +34,25 @@ from cloudinit.distros import uses_systemd
 #     }
 
 format_key = {
-    '%d': 'delta',
-    '%D': 'description',
-    '%E': 'elapsed',
-    '%e': 'event_type',
-    '%I': 'indent',
-    '%l': 'level',
-    '%n': 'name',
-    '%o': 'origin',
-    '%r': 'result',
-    '%t': 'timestamp',
-    '%T': 'total_time',
+    "%d": "delta",
+    "%D": "description",
+    "%E": "elapsed",
+    "%e": "event_type",
+    "%I": "indent",
+    "%l": "level",
+    "%n": "name",
+    "%o": "origin",
+    "%r": "result",
+    "%t": "timestamp",
+    "%T": "total_time",
 }
 
-formatting_help = " ".join(["{0}: {1}".format(k.replace('%', '%%'), v)
-                           for k, v in format_key.items()])
-SUCCESS_CODE = 'successful'
-FAIL_CODE = 'failure'
-CONTAINER_CODE = 'container'
+formatting_help = " ".join(
+    ["{0}: {1}".format(k.replace("%", "%%"), v) for k, v in format_key.items()]
+)
+SUCCESS_CODE = "successful"
+FAIL_CODE = "failure"
+CONTAINER_CODE = "container"
 TIMESTAMP_UNKNOWN = (FAIL_CODE, -1, -1, -1)
 
 
@@ -60,7 +60,7 @@ def format_record(msg, event):
     for i, j in format_key.items():
         if i in msg:
             # ensure consistent formatting of time values
-            if j in ['delta', 'elapsed', 'timestamp']:
+            if j in ["delta", "elapsed", "timestamp"]:
                 msg = msg.replace(i, "{%s:08.5f}" % j)
             else:
                 msg = msg.replace(i, "{%s}" % j)
@@ -68,13 +68,13 @@ def format_record(msg, event):
 
 
 def dump_event_files(event):
-    content = dict((k, v) for k, v in event.items() if k not in ['content'])
-    files = content['files']
+    content = dict((k, v) for k, v in event.items() if k not in ["content"])
+    files = content["files"]
     saved = []
     for f in files:
-        fname = f['path']
+        fname = f["path"]
         fn_local = os.path.basename(fname)
-        fcontent = base64.b64decode(f['content']).decode('ascii')
+        fcontent = base64.b64decode(f["content"]).decode("ascii")
         util.write_file(fn_local, fcontent)
         saved.append(fn_local)
 
@@ -83,13 +83,13 @@ def dump_event_files(event):
 
 def event_name(event):
     if event:
-        return event.get('name')
+        return event.get("name")
     return None
 
 
 def event_type(event):
     if event:
-        return event.get('event_type')
+        return event.get("event_type")
     return None
 
 
@@ -100,7 +100,7 @@ def event_parent(event):
 
 
 def event_timestamp(event):
-    return float(event.get('timestamp'))
+    return float(event.get("timestamp"))
 
 
 def event_datetime(event):
@@ -117,41 +117,44 @@ def event_duration(start, finish):
 
 def event_record(start_time, start, finish):
     record = finish.copy()
-    record.update({
-        'delta': event_duration(start, finish),
-        'elapsed': delta_seconds(start_time, event_datetime(start)),
-        'indent': '|' + ' ' * (event_name(start).count('/') - 1) + '`->',
-    })
+    record.update(
+        {
+            "delta": event_duration(start, finish),
+            "elapsed": delta_seconds(start_time, event_datetime(start)),
+            "indent": "|" + " " * (event_name(start).count("/") - 1) + "`->",
+        }
+    )
 
     return record
 
 
 def total_time_record(total_time):
-    return 'Total Time: %3.5f seconds\n' % total_time
+    return "Total Time: %3.5f seconds\n" % total_time
 
 
 class SystemctlReader(object):
-    '''
+    """
     Class for dealing with all systemctl subp calls in a consistent manner.
-    '''
+    """
+
     def __init__(self, property, parameter=None):
         self.epoch = None
-        self.args = ['/bin/systemctl', 'show']
+        self.args = ["/bin/systemctl", "show"]
         if parameter:
             self.args.append(parameter)
-        self.args.extend(['-p', property])
+        self.args.extend(["-p", property])
         # Don't want the init of our object to break. Instead of throwing
         # an exception, set an error code that gets checked when data is
         # requested from the object
         self.failure = self.subp()
 
     def subp(self):
-        '''
+        """
         Make a subp call based on set args and handle errors by setting
         failure code
 
         :return: whether the subp call failed or not
-        '''
+        """
         try:
             value, err = subp.subp(self.args, capture=True)
             if err:
@@ -162,41 +165,41 @@ class SystemctlReader(object):
             return systemctl_fail
 
     def parse_epoch_as_float(self):
-        '''
+        """
         If subp call succeeded, return the timestamp from subp as a float.
 
         :return: timestamp as a float
-        '''
+        """
         # subp has 2 ways to fail: it either fails and throws an exception,
         # or returns an error code. Raise an exception here in order to make
         # sure both scenarios throw exceptions
         if self.failure:
-            raise RuntimeError('Subprocess call to systemctl has failed, '
-                               'returning error code ({})'
-                               .format(self.failure))
+            raise RuntimeError(
+                "Subprocess call to systemctl has failed, "
+                "returning error code ({})".format(self.failure)
+            )
         # Output from systemctl show has the format Property=Value.
         # For example, UserspaceMonotonic=1929304
-        timestamp = self.epoch.split('=')[1]
+        timestamp = self.epoch.split("=")[1]
         # Timestamps reported by systemctl are in microseconds, converting
         return float(timestamp) / 1000000
 
 
 def dist_check_timestamp():
-    '''
+    """
     Determine which init system a particular linux distro is using.
     Each init system (systemd, upstart, etc) has a different way of
     providing timestamps.
 
     :return: timestamps of kernelboot, kernelendboot, and cloud-initstart
     or TIMESTAMP_UNKNOWN if the timestamps cannot be retrieved.
-    '''
+    """
 
     if uses_systemd():
         return gather_timestamps_using_systemd()
 
     # Use dmesg to get timestamps if the distro does not have systemd
-    if util.is_FreeBSD() or 'gentoo' in \
-            util.system_info()['system'].lower():
+    if util.is_FreeBSD() or "gentoo" in util.system_info()["system"].lower():
         return gather_timestamps_using_dmesg()
 
     # this distro doesn't fit anything that is supported by cloud-init. just
@@ -205,20 +208,20 @@ def dist_check_timestamp():
 
 
 def gather_timestamps_using_dmesg():
-    '''
+    """
     Gather timestamps that corresponds to kernel begin initialization,
     kernel finish initialization using dmesg as opposed to systemctl
 
     :return: the two timestamps plus a dummy timestamp to keep consistency
     with gather_timestamps_using_systemd
-    '''
+    """
     try:
-        data, _ = subp.subp(['dmesg'], capture=True)
+        data, _ = subp.subp(["dmesg"], capture=True)
         split_entries = data[0].splitlines()
         for i in split_entries:
-            if i.decode('UTF-8').find('user') != -1:
-                splitup = i.decode('UTF-8').split()
-                stripped = splitup[1].strip(']')
+            if i.decode("UTF-8").find("user") != -1:
+                splitup = i.decode("UTF-8").split()
+                stripped = splitup[1].strip("]")
 
                 # kernel timestamp from dmesg is equal to 0,
                 # with the userspace timestamp relative to it.
@@ -228,8 +231,7 @@ def gather_timestamps_using_dmesg():
 
                 # systemd wont start cloud-init in this case,
                 # so we cannot get that timestamp
-                return SUCCESS_CODE, kernel_start, kernel_end, \
-                    kernel_end
+                return SUCCESS_CODE, kernel_start, kernel_end, kernel_end
 
     except Exception:
         pass
@@ -237,18 +239,20 @@ def gather_timestamps_using_dmesg():
 
 
 def gather_timestamps_using_systemd():
-    '''
+    """
     Gather timestamps that corresponds to kernel begin initialization,
     kernel finish initialization. and cloud-init systemd unit activation
 
     :return: the three timestamps
-    '''
+    """
     kernel_start = float(time.time()) - float(util.uptime())
     try:
-        delta_k_end = SystemctlReader('UserspaceTimestampMonotonic')\
-            .parse_epoch_as_float()
-        delta_ci_s = SystemctlReader('InactiveExitTimestampMonotonic',
-                                     'cloud-init-local').parse_epoch_as_float()
+        delta_k_end = SystemctlReader(
+            "UserspaceTimestampMonotonic"
+        ).parse_epoch_as_float()
+        delta_ci_s = SystemctlReader(
+            "InactiveExitTimestampMonotonic", "cloud-init-local"
+        ).parse_epoch_as_float()
         base_time = kernel_start
         status = SUCCESS_CODE
         # lxc based containers do not set their monotonic zero point to be when
@@ -262,12 +266,13 @@ def gather_timestamps_using_systemd():
                 # in containers when https://github.com/lxc/lxcfs/issues/292
                 # is fixed, util.uptime() should be used instead of stat on
                 try:
-                    file_stat = os.stat('/proc/1/cmdline')
+                    file_stat = os.stat("/proc/1/cmdline")
                     kernel_start = file_stat.st_atime
                 except OSError as err:
-                    raise RuntimeError('Could not determine container boot '
-                                       'time from /proc/1/cmdline. ({})'
-                                       .format(err)) from err
+                    raise RuntimeError(
+                        "Could not determine container boot "
+                        "time from /proc/1/cmdline. ({})".format(err)
+                    ) from err
                 status = CONTAINER_CODE
             else:
                 status = FAIL_CODE
@@ -283,10 +288,14 @@ def gather_timestamps_using_systemd():
     return status, kernel_start, kernel_end, cloudinit_sysd
 
 
-def generate_records(events, blame_sort=False,
-                     print_format="(%n) %d seconds in %I%D",
-                     dump_files=False, log_datafiles=False):
-    '''
+def generate_records(
+    events,
+    blame_sort=False,
+    print_format="(%n) %d seconds in %I%D",
+    dump_files=False,
+    log_datafiles=False,
+):
+    """
     Take in raw events and create parent-child dependencies between events
     in order to order events in chronological order.
 
@@ -298,9 +307,9 @@ def generate_records(events, blame_sort=False,
     :param log_datafiles: whether or not to log events generated
 
     :return: boot records ordered chronologically
-    '''
+    """
 
-    sorted_events = sorted(events, key=lambda x: x['timestamp'])
+    sorted_events = sorted(events, key=lambda x: x["timestamp"])
     records = []
     start_time = None
     total_time = 0.0
@@ -316,8 +325,8 @@ def generate_records(events, blame_sort=False,
         except IndexError:
             next_evt = None
 
-        if event_type(event) == 'start':
-            if event.get('name') in stages_seen:
+        if event_type(event) == "start":
+            if event.get("name") in stages_seen:
                 records.append(total_time_record(total_time))
                 boot_records.append(records)
                 records = []
@@ -331,25 +340,28 @@ def generate_records(events, blame_sort=False,
 
             # see if we have a pair
             if event_name(event) == event_name(next_evt):
-                if event_type(next_evt) == 'finish':
-                    records.append(format_record(print_format,
-                                                 event_record(start_time,
-                                                              event,
-                                                              next_evt)))
+                if event_type(next_evt) == "finish":
+                    records.append(
+                        format_record(
+                            print_format,
+                            event_record(start_time, event, next_evt),
+                        )
+                    )
             else:
                 # This is a parent event
-                records.append("Starting stage: %s" % event.get('name'))
+                records.append("Starting stage: %s" % event.get("name"))
                 unprocessed.append(event)
-                stages_seen.append(event.get('name'))
+                stages_seen.append(event.get("name"))
                 continue
         else:
             prev_evt = unprocessed.pop()
             if event_name(event) == event_name(prev_evt):
                 record = event_record(start_time, prev_evt, event)
-                records.append(format_record("Finished stage: "
-                                             "(%n) %d seconds",
-                                             record) + "\n")
-                total_time += record.get('delta')
+                records.append(
+                    format_record("Finished stage: (%n) %d seconds", record)
+                    + "\n"
+                )
+                total_time += record.get("delta")
             else:
                 # not a match, put it back
                 unprocessed.append(prev_evt)
@@ -360,7 +372,7 @@ def generate_records(events, blame_sort=False,
 
 
 def show_events(events, print_format):
-    '''
+    """
     A passthrough method that makes it easier to call generate_records()
 
     :param events: JSONs from dump that represents events taken from logs
@@ -368,18 +380,18 @@ def show_events(events, print_format):
     and time taken by the event in one line
 
     :return: boot records ordered chronologically
-    '''
+    """
     return generate_records(events, print_format=print_format)
 
 
 def load_events_infile(infile):
-    '''
+    """
     Takes in a log file, read it, and convert to json.
 
     :param infile: The Log file to be read
 
     :return: json version of logfile, raw file
-    '''
+    """
     data = infile.read()
     try:
         return json.loads(data), data
diff --git a/cloudinit/apport.py b/cloudinit/apport.py
index aadc638f..92068aa9 100644
--- a/cloudinit/apport.py
+++ b/cloudinit/apport.py
@@ -2,127 +2,143 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-'''Cloud-init apport interface'''
+"""Cloud-init apport interface"""
 
 try:
     from apport.hookutils import (
-        attach_file, attach_root_command_outputs, root_command_output)
+        attach_file,
+        attach_root_command_outputs,
+        root_command_output,
+    )
+
     has_apport = True
 except ImportError:
     has_apport = False
 
 
 KNOWN_CLOUD_NAMES = [
-    'AliYun',
-    'AltCloud',
-    'Amazon - Ec2',
-    'Azure',
-    'Bigstep',
-    'Brightbox',
-    'CloudSigma',
-    'CloudStack',
-    'DigitalOcean',
-    'E24Cloud',
-    'GCE - Google Compute Engine',
-    'Exoscale',
-    'Hetzner Cloud',
-    'IBM - (aka SoftLayer or BlueMix)',
-    'LXD',
-    'MAAS',
-    'NoCloud',
-    'OpenNebula',
-    'OpenStack',
-    'Oracle',
-    'OVF',
-    'RbxCloud - (HyperOne, Rootbox, Rubikon)',
-    'OpenTelekomCloud',
-    'SAP Converged Cloud',
-    'Scaleway',
-    'SmartOS',
-    'UpCloud',
-    'VMware',
-    'Vultr',
-    'ZStack',
-    'Other'
+    "AliYun",
+    "AltCloud",
+    "Amazon - Ec2",
+    "Azure",
+    "Bigstep",
+    "Brightbox",
+    "CloudSigma",
+    "CloudStack",
+    "DigitalOcean",
+    "E24Cloud",
+    "GCE - Google Compute Engine",
+    "Exoscale",
+    "Hetzner Cloud",
+    "IBM - (aka SoftLayer or BlueMix)",
+    "LXD",
+    "MAAS",
+    "NoCloud",
+    "OpenNebula",
+    "OpenStack",
+    "Oracle",
+    "OVF",
+    "RbxCloud - (HyperOne, Rootbox, Rubikon)",
+    "OpenTelekomCloud",
+    "SAP Converged Cloud",
+    "Scaleway",
+    "SmartOS",
+    "UpCloud",
+    "VMware",
+    "Vultr",
+    "ZStack",
+    "Other",
 ]
 
 # Potentially clear text collected logs
-CLOUDINIT_LOG = '/var/log/cloud-init.log'
-CLOUDINIT_OUTPUT_LOG = '/var/log/cloud-init-output.log'
-USER_DATA_FILE = '/var/lib/cloud/instance/user-data.txt'  # Optional
+CLOUDINIT_LOG = "/var/log/cloud-init.log"
+CLOUDINIT_OUTPUT_LOG = "/var/log/cloud-init-output.log"
+USER_DATA_FILE = "/var/lib/cloud/instance/user-data.txt"  # Optional
 
 
 def attach_cloud_init_logs(report, ui=None):
-    '''Attach cloud-init logs and tarfile from 'cloud-init collect-logs'.'''
-    attach_root_command_outputs(report, {
-        'cloud-init-log-warnings':
-            'egrep -i "warn|error" /var/log/cloud-init.log',
-        'cloud-init-output.log.txt': 'cat /var/log/cloud-init-output.log'})
+    """Attach cloud-init logs and tarfile from 'cloud-init collect-logs'."""
+    attach_root_command_outputs(
+        report,
+        {
+            "cloud-init-log-warnings": (
+                'egrep -i "warn|error" /var/log/cloud-init.log'
+            ),
+            "cloud-init-output.log.txt": "cat /var/log/cloud-init-output.log",
+        },
+    )
     root_command_output(
-        ['cloud-init', 'collect-logs', '-t', '/tmp/cloud-init-logs.tgz'])
-    attach_file(report, '/tmp/cloud-init-logs.tgz', 'logs.tgz')
+        ["cloud-init", "collect-logs", "-t", "/tmp/cloud-init-logs.tgz"]
+    )
+    attach_file(report, "/tmp/cloud-init-logs.tgz", "logs.tgz")
 
 
 def attach_hwinfo(report, ui=None):
-    '''Optionally attach hardware info from lshw.'''
+    """Optionally attach hardware info from lshw."""
     prompt = (
-        'Your device details (lshw) may be useful to developers when'
-        ' addressing this bug, but gathering it requires admin privileges.'
-        ' Would you like to include this info?')
+        "Your device details (lshw) may be useful to developers when"
+        " addressing this bug, but gathering it requires admin privileges."
+        " Would you like to include this info?"
+    )
     if ui and ui.yesno(prompt):
-        attach_root_command_outputs(report, {'lshw.txt': 'lshw'})
+        attach_root_command_outputs(report, {"lshw.txt": "lshw"})
 
 
 def attach_cloud_info(report, ui=None):
-    '''Prompt for cloud details if available.'''
+    """Prompt for cloud details if available."""
     if ui:
-        prompt = 'Is this machine running in a cloud environment?'
+        prompt = "Is this machine running in a cloud environment?"
         response = ui.yesno(prompt)
         if response is None:
             raise StopIteration  # User cancelled
         if response:
-            prompt = ('Please select the cloud vendor or environment in which'
-                      ' this instance is running')
+            prompt = (
+                "Please select the cloud vendor or environment in which"
+                " this instance is running"
+            )
             response = ui.choice(prompt, KNOWN_CLOUD_NAMES)
             if response:
-                report['CloudName'] = KNOWN_CLOUD_NAMES[response[0]]
+                report["CloudName"] = KNOWN_CLOUD_NAMES[response[0]]
             else:
-                report['CloudName'] = 'None'
+                report["CloudName"] = "None"
 
 
 def attach_user_data(report, ui=None):
-    '''Optionally provide user-data if desired.'''
+    """Optionally provide user-data if desired."""
     if ui:
         prompt = (
-            'Your user-data or cloud-config file can optionally be provided'
-            ' from {0} and could be useful to developers when addressing this'
-            ' bug. Do you wish to attach user-data to this bug?'.format(
-                USER_DATA_FILE))
+            "Your user-data or cloud-config file can optionally be provided"
+            " from {0} and could be useful to developers when addressing this"
+            " bug. Do you wish to attach user-data to this bug?".format(
+                USER_DATA_FILE
+            )
+        )
         response = ui.yesno(prompt)
         if response is None:
             raise StopIteration  # User cancelled
         if response:
-            attach_file(report, USER_DATA_FILE, 'user_data.txt')
+            attach_file(report, USER_DATA_FILE, "user_data.txt")
 
 
 def add_bug_tags(report):
-    '''Add any appropriate tags to the bug.'''
-    if 'JournalErrors' in report.keys():
-        errors = report['JournalErrors']
-        if 'Breaking ordering cycle' in errors:
-            report['Tags'] = 'systemd-ordering'
+    """Add any appropriate tags to the bug."""
+    if "JournalErrors" in report.keys():
+        errors = report["JournalErrors"]
+        if "Breaking ordering cycle" in errors:
+            report["Tags"] = "systemd-ordering"
 
 
 def add_info(report, ui):
-    '''This is an entry point to run cloud-init's apport functionality.
+    """This is an entry point to run cloud-init's apport functionality.
 
     Distros which want apport support will have a cloud-init package-hook at
     /usr/share/apport/package-hooks/cloud-init.py which defines an add_info
     function and returns the result of cloudinit.apport.add_info(report, ui).
-    '''
+    """
     if not has_apport:
         raise RuntimeError(
-            'No apport imports discovered. Apport functionality disabled')
+            "No apport imports discovered. Apport functionality disabled"
+        )
     attach_cloud_init_logs(report, ui)
     attach_hwinfo(report, ui)
     attach_cloud_info(report, ui)
@@ -130,4 +146,5 @@ def add_info(report, ui):
     add_bug_tags(report)
     return True
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/atomic_helper.py b/cloudinit/atomic_helper.py
index 485ff92f..ae117fad 100644
--- a/cloudinit/atomic_helper.py
+++ b/cloudinit/atomic_helper.py
@@ -10,8 +10,9 @@ _DEF_PERMS = 0o644
 LOG = logging.getLogger(__name__)
 
 
-def write_file(filename, content, mode=_DEF_PERMS,
-               omode="wb", preserve_mode=False):
+def write_file(
+    filename, content, mode=_DEF_PERMS, omode="wb", preserve_mode=False
+):
     # open filename in mode 'omode', write content, set permissions to 'mode'
 
     if preserve_mode:
@@ -23,12 +24,18 @@ def write_file(filename, content, mode=_DEF_PERMS,
 
     tf = None
     try:
-        tf = tempfile.NamedTemporaryFile(dir=os.path.dirname(filename),
-                                         delete=False, mode=omode)
+        tf = tempfile.NamedTemporaryFile(
+            dir=os.path.dirname(filename), delete=False, mode=omode
+        )
         LOG.debug(
             "Atomically writing to file %s (via temporary file %s) - %s: [%o]"
             " %d bytes/chars",
-            filename, tf.name, omode, mode, len(content))
+            filename,
+            tf.name,
+            omode,
+            mode,
+            len(content),
+        )
         tf.write(content)
         tf.close()
         os.chmod(tf.name, mode)
@@ -42,7 +49,11 @@ def write_file(filename, content, mode=_DEF_PERMS,
 def write_json(filename, data, mode=_DEF_PERMS):
     # dump json representation of data to file filename.
     return write_file(
-        filename, json.dumps(data, indent=1, sort_keys=True) + "\n",
-        omode="w", mode=mode)
+        filename,
+        json.dumps(data, indent=1, sort_keys=True) + "\n",
+        omode="w",
+        mode=mode,
+    )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/cloud.py b/cloudinit/cloud.py
index 7ae98e1c..91e48103 100644
--- a/cloudinit/cloud.py
+++ b/cloudinit/cloud.py
@@ -35,7 +35,8 @@ class Cloud(object):
             reporter = events.ReportEventStack(
                 name="unnamed-cloud-reporter",
                 description="unnamed-cloud-reporter",
-                reporting_enabled=False)
+                reporting_enabled=False,
+            )
         self.reporter = reporter
 
     # If a 'user' manipulates logging or logging services
@@ -56,8 +57,11 @@ class Cloud(object):
     def get_template_filename(self, name):
         fn = self.paths.template_tpl % (name)
         if not os.path.isfile(fn):
-            LOG.warning("No template found in %s for template named %s",
-                        os.path.dirname(fn), name)
+            LOG.warning(
+                "No template found in %s for template named %s",
+                os.path.dirname(fn),
+                name,
+            )
             return None
         return fn
 
@@ -80,7 +84,8 @@ class Cloud(object):
 
     def get_hostname(self, fqdn=False, metadata_only=False):
         return self.datasource.get_hostname(
-            fqdn=fqdn, metadata_only=metadata_only)
+            fqdn=fqdn, metadata_only=metadata_only
+        )
 
     def device_name_to_device(self, name):
         return self.datasource.device_name_to_device(name)
@@ -94,4 +99,5 @@ class Cloud(object):
     def get_ipath(self, name=None):
         return self.paths.get_ipath(name)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/cmd/clean.py b/cloudinit/cmd/clean.py
index 3502dd56..0e1db118 100644
--- a/cloudinit/cmd/clean.py
+++ b/cloudinit/cmd/clean.py
@@ -10,9 +10,13 @@ import os
 import sys
 
 from cloudinit.stages import Init
-from cloudinit.subp import (ProcessExecutionError, subp)
+from cloudinit.subp import ProcessExecutionError, subp
 from cloudinit.util import (
-    del_dir, del_file, get_config_logfiles, is_link, error
+    del_dir,
+    del_file,
+    error,
+    get_config_logfiles,
+    is_link,
 )
 
 
@@ -27,18 +31,35 @@ def get_parser(parser=None):
     """
     if not parser:
         parser = argparse.ArgumentParser(
-            prog='clean',
-            description=('Remove logs and artifacts so cloud-init re-runs on '
-                         'a clean system'))
+            prog="clean",
+            description=(
+                "Remove logs and artifacts so cloud-init re-runs on "
+                "a clean system"
+            ),
+        )
     parser.add_argument(
-        '-l', '--logs', action='store_true', default=False, dest='remove_logs',
-        help='Remove cloud-init logs.')
+        "-l",
+        "--logs",
+        action="store_true",
+        default=False,
+        dest="remove_logs",
+        help="Remove cloud-init logs.",
+    )
     parser.add_argument(
-        '-r', '--reboot', action='store_true', default=False,
-        help='Reboot system after logs are cleaned so cloud-init re-runs.')
+        "-r",
+        "--reboot",
+        action="store_true",
+        default=False,
+        help="Reboot system after logs are cleaned so cloud-init re-runs.",
+    )
     parser.add_argument(
-        '-s', '--seed', action='store_true', default=False, dest='remove_seed',
-        help='Remove cloud-init seed directory /var/lib/cloud/seed.')
+        "-s",
+        "--seed",
+        action="store_true",
+        default=False,
+        dest="remove_seed",
+        help="Remove cloud-init seed directory /var/lib/cloud/seed.",
+    )
     return parser
 
 
@@ -59,8 +80,8 @@ def remove_artifacts(remove_logs, remove_seed=False):
 
     if not os.path.isdir(init.paths.cloud_dir):
         return 0  # Artifacts dir already cleaned
-    seed_path = os.path.join(init.paths.cloud_dir, 'seed')
-    for path in glob.glob('%s/*' % init.paths.cloud_dir):
+    seed_path = os.path.join(init.paths.cloud_dir, "seed")
+    for path in glob.glob("%s/*" % init.paths.cloud_dir):
         if path == seed_path and not remove_seed:
             continue
         try:
@@ -69,7 +90,7 @@ def remove_artifacts(remove_logs, remove_seed=False):
             else:
                 del_file(path)
         except OSError as e:
-            error('Could not remove {0}: {1}'.format(path, str(e)))
+            error("Could not remove {0}: {1}".format(path, str(e)))
             return 1
     return 0
 
@@ -78,13 +99,15 @@ def handle_clean_args(name, args):
     """Handle calls to 'cloud-init clean' as a subcommand."""
     exit_code = remove_artifacts(args.remove_logs, args.remove_seed)
     if exit_code == 0 and args.reboot:
-        cmd = ['shutdown', '-r', 'now']
+        cmd = ["shutdown", "-r", "now"]
         try:
             subp(cmd, capture=False)
         except ProcessExecutionError as e:
             error(
                 'Could not reboot this system using "{0}": {1}'.format(
-                    cmd, str(e)))
+                    cmd, str(e)
+                )
+            )
             exit_code = 1
     return exit_code
 
@@ -92,10 +115,10 @@ def handle_clean_args(name, args):
 def main():
     """Tool to collect and tar all cloud-init related logs."""
     parser = get_parser()
-    sys.exit(handle_clean_args('clean', parser.parse_args()))
+    sys.exit(handle_clean_args("clean", parser.parse_args()))
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/cmd/cloud_id.py b/cloudinit/cmd/cloud_id.py
index 0cdc9675..b92b03a8 100755
--- a/cloudinit/cmd/cloud_id.py
+++ b/cloudinit/cmd/cloud_id.py
@@ -6,13 +6,16 @@ import argparse
 import json
 import sys
 
-from cloudinit.util import error
 from cloudinit.sources import (
-    INSTANCE_JSON_FILE, METADATA_UNKNOWN, canonical_cloud_id)
+    INSTANCE_JSON_FILE,
+    METADATA_UNKNOWN,
+    canonical_cloud_id,
+)
+from cloudinit.util import error
 
-DEFAULT_INSTANCE_JSON = '/run/cloud-init/%s' % INSTANCE_JSON_FILE
+DEFAULT_INSTANCE_JSON = "/run/cloud-init/%s" % INSTANCE_JSON_FILE
 
-NAME = 'cloud-id'
+NAME = "cloud-id"
 
 
 def get_parser(parser=None):
@@ -27,17 +30,30 @@ def get_parser(parser=None):
     if not parser:
         parser = argparse.ArgumentParser(
             prog=NAME,
-            description='Report the canonical cloud-id for this instance')
+            description="Report the canonical cloud-id for this instance",
+        )
     parser.add_argument(
-        '-j', '--json', action='store_true', default=False,
-        help='Report all standardized cloud-id information as json.')
+        "-j",
+        "--json",
+        action="store_true",
+        default=False,
+        help="Report all standardized cloud-id information as json.",
+    )
     parser.add_argument(
-        '-l', '--long', action='store_true', default=False,
-        help='Report extended cloud-id information as tab-delimited string.')
+        "-l",
+        "--long",
+        action="store_true",
+        default=False,
+        help="Report extended cloud-id information as tab-delimited string.",
+    )
     parser.add_argument(
-        '-i', '--instance-data', type=str, default=DEFAULT_INSTANCE_JSON,
-        help=('Path to instance-data.json file. Default is %s' %
-              DEFAULT_INSTANCE_JSON))
+        "-i",
+        "--instance-data",
+        type=str,
+        default=DEFAULT_INSTANCE_JSON,
+        help="Path to instance-data.json file. Default is %s"
+        % DEFAULT_INSTANCE_JSON,
+    )
     return parser
 
 
@@ -53,24 +69,28 @@ def handle_args(name, args):
     except IOError:
         return error(
             "File not found '%s'. Provide a path to instance data json file"
-            ' using --instance-data' % args.instance_data)
+            " using --instance-data" % args.instance_data
+        )
     except ValueError as e:
         return error(
-            "File '%s' is not valid json. %s" % (args.instance_data, e))
-    v1 = instance_data.get('v1', {})
+            "File '%s' is not valid json. %s" % (args.instance_data, e)
+        )
+    v1 = instance_data.get("v1", {})
     cloud_id = canonical_cloud_id(
-        v1.get('cloud_name', METADATA_UNKNOWN),
-        v1.get('region', METADATA_UNKNOWN),
-        v1.get('platform', METADATA_UNKNOWN))
+        v1.get("cloud_name", METADATA_UNKNOWN),
+        v1.get("region", METADATA_UNKNOWN),
+        v1.get("platform", METADATA_UNKNOWN),
+    )
     if args.json:
-        v1['cloud_id'] = cloud_id
-        response = json.dumps(   # Pretty, sorted json
-            v1, indent=1, sort_keys=True, separators=(',', ': '))
+        v1["cloud_id"] = cloud_id
+        response = json.dumps(  # Pretty, sorted json
+            v1, indent=1, sort_keys=True, separators=(",", ": ")
+        )
     elif args.long:
-        response = '%s\t%s' % (cloud_id, v1.get('region', METADATA_UNKNOWN))
+        response = "%s\t%s" % (cloud_id, v1.get("region", METADATA_UNKNOWN))
     else:
         response = cloud_id
-    sys.stdout.write('%s\n' % response)
+    sys.stdout.write("%s\n" % response)
     return 0
 
 
@@ -80,7 +100,7 @@ def main():
     sys.exit(handle_args(NAME, parser.parse_args()))
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/cmd/devel/__init__.py b/cloudinit/cmd/devel/__init__.py
index 3ae28b69..ead5f7a9 100644
--- a/cloudinit/cmd/devel/__init__.py
+++ b/cloudinit/cmd/devel/__init__.py
@@ -11,7 +11,7 @@ from cloudinit.stages import Init
 
 def addLogHandlerCLI(logger, log_level):
     """Add a commandline logging handler to emit messages to stderr."""
-    formatter = logging.Formatter('%(levelname)s: %(message)s')
+    formatter = logging.Formatter("%(levelname)s: %(message)s")
     log.setupBasicLogging(log_level, formatter=formatter)
     return logger
 
@@ -22,4 +22,5 @@ def read_cfg_paths():
     init.read_cfg()
     return init.paths
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/cmd/devel/hotplug_hook.py b/cloudinit/cmd/devel/hotplug_hook.py
index f6f36a00..a9be0379 100644
--- a/cloudinit/cmd/devel/hotplug_hook.py
+++ b/cloudinit/cmd/devel/hotplug_hook.py
@@ -6,20 +6,17 @@ import os
 import sys
 import time
 
-from cloudinit import log
-from cloudinit import reporting
-from cloudinit import stages
+from cloudinit import log, reporting, stages
 from cloudinit.event import EventScope, EventType
 from cloudinit.net import activators, read_sys_net_safe
 from cloudinit.net.network_state import parse_net_config_data
 from cloudinit.reporting import events
-from cloudinit.stages import Init
 from cloudinit.sources import DataSource  # noqa: F401
 from cloudinit.sources import DataSourceNotFoundException
-
+from cloudinit.stages import Init
 
 LOG = log.getLogger(__name__)
-NAME = 'hotplug-hook'
+NAME = "hotplug-hook"
 
 
 def get_parser(parser=None):
@@ -35,33 +32,38 @@ def get_parser(parser=None):
 
     parser.description = __doc__
     parser.add_argument(
-        "-s", "--subsystem", required=True,
+        "-s",
+        "--subsystem",
+        required=True,
         help="subsystem to act on",
-        choices=['net']
+        choices=["net"],
     )
 
     subparsers = parser.add_subparsers(
-        title='Hotplug Action',
-        dest='hotplug_action'
+        title="Hotplug Action", dest="hotplug_action"
     )
     subparsers.required = True
 
     subparsers.add_parser(
-        'query',
-        help='query if hotplug is enabled for given subsystem'
+        "query", help="query if hotplug is enabled for given subsystem"
     )
 
     parser_handle = subparsers.add_parser(
-        'handle', help='handle the hotplug event')
+        "handle", help="handle the hotplug event"
+    )
     parser_handle.add_argument(
-        "-d", "--devpath", required=True,
+        "-d",
+        "--devpath",
+        required=True,
         metavar="PATH",
-        help="sysfs path to hotplugged device"
+        help="sysfs path to hotplugged device",
     )
     parser_handle.add_argument(
-        "-u", "--udevaction", required=True,
+        "-u",
+        "--udevaction",
+        required=True,
         help="action to take",
-        choices=['add', 'remove']
+        choices=["add", "remove"],
     )
 
     return parser
@@ -90,27 +92,29 @@ class UeventHandler(abc.ABC):
 
     def detect_hotplugged_device(self):
         detect_presence = None
-        if self.action == 'add':
+        if self.action == "add":
             detect_presence = True
-        elif self.action == 'remove':
+        elif self.action == "remove":
             detect_presence = False
         else:
-            raise ValueError('Unknown action: %s' % self.action)
+            raise ValueError("Unknown action: %s" % self.action)
 
         if detect_presence != self.device_detected():
             raise RuntimeError(
-                'Failed to detect %s in updated metadata' % self.id)
+                "Failed to detect %s in updated metadata" % self.id
+            )
 
     def success(self):
         return self.success_fn()
 
     def update_metadata(self):
-        result = self.datasource.update_metadata_if_supported([
-            EventType.HOTPLUG])
+        result = self.datasource.update_metadata_if_supported(
+            [EventType.HOTPLUG]
+        )
         if not result:
             raise RuntimeError(
-                'Datasource %s not updated for '
-                'event %s' % (self.datasource, EventType.HOTPLUG)
+                "Datasource %s not updated for event %s"
+                % (self.datasource, EventType.HOTPLUG)
             )
         return result
 
@@ -118,7 +122,7 @@ class UeventHandler(abc.ABC):
 class NetHandler(UeventHandler):
     def __init__(self, datasource, devpath, action, success_fn):
         # convert devpath to mac address
-        id = read_sys_net_safe(os.path.basename(devpath), 'address')
+        id = read_sys_net_safe(os.path.basename(devpath), "address")
         super().__init__(id, datasource, devpath, action, success_fn)
 
     def apply(self):
@@ -128,14 +132,16 @@ class NetHandler(UeventHandler):
         )
         interface_name = os.path.basename(self.devpath)
         activator = activators.select_activator()
-        if self.action == 'add':
+        if self.action == "add":
             if not activator.bring_up_interface(interface_name):
                 raise RuntimeError(
-                    'Failed to bring up device: {}'.format(self.devpath))
-        elif self.action == 'remove':
+                    "Failed to bring up device: {}".format(self.devpath)
+                )
+        elif self.action == "remove":
             if not activator.bring_down_interface(interface_name):
                 raise RuntimeError(
-                    'Failed to bring down device: {}'.format(self.devpath))
+                    "Failed to bring down device: {}".format(self.devpath)
+                )
 
     @property
     def config(self):
@@ -144,15 +150,16 @@ class NetHandler(UeventHandler):
     def device_detected(self) -> bool:
         netstate = parse_net_config_data(self.config)
         found = [
-            iface for iface in netstate.iter_interfaces()
-            if iface.get('mac_address') == self.id
+            iface
+            for iface in netstate.iter_interfaces()
+            if iface.get("mac_address") == self.id
         ]
-        LOG.debug('Ifaces with ID=%s : %s', self.id, found)
+        LOG.debug("Ifaces with ID=%s : %s", self.id, found)
         return len(found) > 0
 
 
 SUBSYSTEM_PROPERTES_MAP = {
-    'net': (NetHandler, EventScope.NETWORK),
+    "net": (NetHandler, EventScope.NETWORK),
 }
 
 
@@ -161,66 +168,65 @@ def is_enabled(hotplug_init, subsystem):
         scope = SUBSYSTEM_PROPERTES_MAP[subsystem][1]
     except KeyError as e:
         raise Exception(
-            'hotplug-hook: cannot handle events for subsystem: {}'.format(
-                subsystem)
+            "hotplug-hook: cannot handle events for subsystem: {}".format(
+                subsystem
+            )
         ) from e
 
     return stages.update_event_enabled(
         datasource=hotplug_init.datasource,
         cfg=hotplug_init.cfg,
         event_source_type=EventType.HOTPLUG,
-        scope=scope
+        scope=scope,
     )
 
 
 def initialize_datasource(hotplug_init, subsystem):
-    LOG.debug('Fetching datasource')
+    LOG.debug("Fetching datasource")
     datasource = hotplug_init.fetch(existing="trust")
 
     if not datasource.get_supported_events([EventType.HOTPLUG]):
-        LOG.debug('hotplug not supported for event of type %s', subsystem)
+        LOG.debug("hotplug not supported for event of type %s", subsystem)
         return
 
     if not is_enabled(hotplug_init, subsystem):
-        LOG.debug('hotplug not enabled for event of type %s', subsystem)
+        LOG.debug("hotplug not enabled for event of type %s", subsystem)
         return
     return datasource
 
 
-def handle_hotplug(
-    hotplug_init: Init, devpath, subsystem, udevaction
-):
+def handle_hotplug(hotplug_init: Init, devpath, subsystem, udevaction):
     datasource = initialize_datasource(hotplug_init, subsystem)
     if not datasource:
         return
     handler_cls = SUBSYSTEM_PROPERTES_MAP[subsystem][0]
-    LOG.debug('Creating %s event handler', subsystem)
+    LOG.debug("Creating %s event handler", subsystem)
     event_handler = handler_cls(
         datasource=datasource,
         devpath=devpath,
         action=udevaction,
-        success_fn=hotplug_init._write_to_cache
+        success_fn=hotplug_init._write_to_cache,
     )  # type: UeventHandler
     wait_times = [1, 3, 5, 10, 30]
     for attempt, wait in enumerate(wait_times):
         LOG.debug(
-            'subsystem=%s update attempt %s/%s',
+            "subsystem=%s update attempt %s/%s",
             subsystem,
             attempt,
-            len(wait_times)
+            len(wait_times),
         )
         try:
-            LOG.debug('Refreshing metadata')
+            LOG.debug("Refreshing metadata")
             event_handler.update_metadata()
-            LOG.debug('Detecting device in updated metadata')
+            LOG.debug("Detecting device in updated metadata")
             event_handler.detect_hotplugged_device()
-            LOG.debug('Applying config change')
+            LOG.debug("Applying config change")
             event_handler.apply()
-            LOG.debug('Updating cache')
+            LOG.debug("Updating cache")
             event_handler.success()
             break
         except Exception as e:
-            LOG.debug('Exception while processing hotplug event. %s', e)
+            LOG.debug("Exception while processing hotplug event. %s", e)
             time.sleep(wait)
             last_exception = e
     else:
@@ -238,31 +244,33 @@ def handle_args(name, args):
     hotplug_init.read_cfg()
 
     log.setupLogging(hotplug_init.cfg)
-    if 'reporting' in hotplug_init.cfg:
-        reporting.update_configuration(hotplug_init.cfg.get('reporting'))
+    if "reporting" in hotplug_init.cfg:
+        reporting.update_configuration(hotplug_init.cfg.get("reporting"))
     # Logging isn't going to be setup until now
     LOG.debug(
-        '%s called with the following arguments: {'
-        'hotplug_action: %s, subsystem: %s, udevaction: %s, devpath: %s}',
+        "%s called with the following arguments: {"
+        "hotplug_action: %s, subsystem: %s, udevaction: %s, devpath: %s}",
         name,
         args.hotplug_action,
         args.subsystem,
-        args.udevaction if 'udevaction' in args else None,
-        args.devpath if 'devpath' in args else None,
+        args.udevaction if "udevaction" in args else None,
+        args.devpath if "devpath" in args else None,
     )
 
     with hotplug_reporter:
         try:
-            if args.hotplug_action == 'query':
+            if args.hotplug_action == "query":
                 try:
                     datasource = initialize_datasource(
-                        hotplug_init, args.subsystem)
+                        hotplug_init, args.subsystem
+                    )
                 except DataSourceNotFoundException:
                     print(
                         "Unable to determine hotplug state. No datasource "
-                        "detected")
+                        "detected"
+                    )
                     sys.exit(1)
-                print('enabled' if datasource else 'disabled')
+                print("enabled" if datasource else "disabled")
             else:
                 handle_hotplug(
                     hotplug_init=hotplug_init,
@@ -271,13 +279,13 @@ def handle_args(name, args):
                     udevaction=args.udevaction,
                 )
         except Exception:
-            LOG.exception('Received fatal exception handling hotplug!')
+            LOG.exception("Received fatal exception handling hotplug!")
             raise
 
-    LOG.debug('Exiting hotplug handler')
+    LOG.debug("Exiting hotplug handler")
     reporting.flush_events()
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     args = get_parser().parse_args()
     handle_args(NAME, args)
diff --git a/cloudinit/cmd/devel/logs.py b/cloudinit/cmd/devel/logs.py
index 31ade73d..d54b809a 100644
--- a/cloudinit/cmd/devel/logs.py
+++ b/cloudinit/cmd/devel/logs.py
@@ -5,20 +5,19 @@
 """Define 'collect-logs' utility and handler to include in cloud-init cmd."""
 
 import argparse
-from datetime import datetime
 import os
 import shutil
 import sys
+from datetime import datetime
 
 from cloudinit.sources import INSTANCE_JSON_SENSITIVE_FILE
+from cloudinit.subp import ProcessExecutionError, subp
 from cloudinit.temp_utils import tempdir
-from cloudinit.subp import (ProcessExecutionError, subp)
-from cloudinit.util import (chdir, copy, ensure_dir, write_file)
+from cloudinit.util import chdir, copy, ensure_dir, write_file
 
-
-CLOUDINIT_LOGS = ['/var/log/cloud-init.log', '/var/log/cloud-init-output.log']
-CLOUDINIT_RUN_DIR = '/run/cloud-init'
-USER_DATA_FILE = '/var/lib/cloud/instance/user-data.txt'  # Optional
+CLOUDINIT_LOGS = ["/var/log/cloud-init.log", "/var/log/cloud-init-output.log"]
+CLOUDINIT_RUN_DIR = "/run/cloud-init"
+USER_DATA_FILE = "/var/lib/cloud/instance/user-data.txt"  # Optional
 
 
 def get_parser(parser=None):
@@ -32,26 +31,44 @@ def get_parser(parser=None):
     """
     if not parser:
         parser = argparse.ArgumentParser(
-            prog='collect-logs',
-            description='Collect and tar all cloud-init debug info')
-    parser.add_argument('--verbose', '-v', action='count', default=0,
-                        dest='verbosity', help="Be more verbose.")
+            prog="collect-logs",
+            description="Collect and tar all cloud-init debug info",
+        )
+    parser.add_argument(
+        "--verbose",
+        "-v",
+        action="count",
+        default=0,
+        dest="verbosity",
+        help="Be more verbose.",
+    )
     parser.add_argument(
-        "--tarfile", '-t', default='cloud-init.tar.gz',
-        help=('The tarfile to create containing all collected logs.'
-              ' Default: cloud-init.tar.gz'))
+        "--tarfile",
+        "-t",
+        default="cloud-init.tar.gz",
+        help=(
+            "The tarfile to create containing all collected logs."
+            " Default: cloud-init.tar.gz"
+        ),
+    )
     parser.add_argument(
-        "--include-userdata", '-u', default=False, action='store_true',
-        dest='userdata', help=(
-            'Optionally include user-data from {0} which could contain'
-            ' sensitive information.'.format(USER_DATA_FILE)))
+        "--include-userdata",
+        "-u",
+        default=False,
+        action="store_true",
+        dest="userdata",
+        help=(
+            "Optionally include user-data from {0} which could contain"
+            " sensitive information.".format(USER_DATA_FILE)
+        ),
+    )
     return parser
 
 
 def _copytree_rundir_ignore_files(curdir, files):
     """Return a list of files to ignore for /run/cloud-init directory"""
     ignored_files = [
-        'hook-hotplug-cmd',  # named pipe for hotplug
+        "hook-hotplug-cmd",  # named pipe for hotplug
     ]
     if os.getuid() != 0:
         # Ignore root-permissioned files
@@ -94,52 +111,67 @@ def collect_logs(tarfile, include_userdata, verbosity=0):
     if include_userdata and os.getuid() != 0:
         sys.stderr.write(
             "To include userdata, root user is required."
-            " Try sudo cloud-init collect-logs\n")
+            " Try sudo cloud-init collect-logs\n"
+        )
         return 1
     tarfile = os.path.abspath(tarfile)
-    date = datetime.utcnow().date().strftime('%Y-%m-%d')
-    log_dir = 'cloud-init-logs-{0}'.format(date)
-    with tempdir(dir='/tmp') as tmp_dir:
+    date = datetime.utcnow().date().strftime("%Y-%m-%d")
+    log_dir = "cloud-init-logs-{0}".format(date)
+    with tempdir(dir="/tmp") as tmp_dir:
         log_dir = os.path.join(tmp_dir, log_dir)
         version = _write_command_output_to_file(
-            ['cloud-init', '--version'],
-            os.path.join(log_dir, 'version'),
-            "cloud-init --version", verbosity)
+            ["cloud-init", "--version"],
+            os.path.join(log_dir, "version"),
+            "cloud-init --version",
+            verbosity,
+        )
         dpkg_ver = _write_command_output_to_file(
-            ['dpkg-query', '--show', "-f=${Version}\n", 'cloud-init'],
-            os.path.join(log_dir, 'dpkg-version'),
-            "dpkg version", verbosity)
+            ["dpkg-query", "--show", "-f=${Version}\n", "cloud-init"],
+            os.path.join(log_dir, "dpkg-version"),
+            "dpkg version",
+            verbosity,
+        )
         if not version:
             version = dpkg_ver if dpkg_ver else "not-available"
         _debug("collected cloud-init version: %s\n" % version, 1, verbosity)
         _write_command_output_to_file(
-            ['dmesg'], os.path.join(log_dir, 'dmesg.txt'),
-            "dmesg output", verbosity)
+            ["dmesg"],
+            os.path.join(log_dir, "dmesg.txt"),
+            "dmesg output",
+            verbosity,
+        )
         _write_command_output_to_file(
-            ['journalctl', '--boot=0', '-o', 'short-precise'],
-            os.path.join(log_dir, 'journal.txt'),
-            "systemd journal of current boot", verbosity)
+            ["journalctl", "--boot=0", "-o", "short-precise"],
+            os.path.join(log_dir, "journal.txt"),
+            "systemd journal of current boot",
+            verbosity,
+        )
 
         for log in CLOUDINIT_LOGS:
             _collect_file(log, log_dir, verbosity)
         if include_userdata:
             _collect_file(USER_DATA_FILE, log_dir, verbosity)
-        run_dir = os.path.join(log_dir, 'run')
+        run_dir = os.path.join(log_dir, "run")
         ensure_dir(run_dir)
         if os.path.exists(CLOUDINIT_RUN_DIR):
             try:
-                shutil.copytree(CLOUDINIT_RUN_DIR,
-                                os.path.join(run_dir, 'cloud-init'),
-                                ignore=_copytree_rundir_ignore_files)
+                shutil.copytree(
+                    CLOUDINIT_RUN_DIR,
+                    os.path.join(run_dir, "cloud-init"),
+                    ignore=_copytree_rundir_ignore_files,
+                )
             except shutil.Error as e:
                 sys.stderr.write("Failed collecting file(s) due to error:\n")
-                sys.stderr.write(str(e) + '\n')
+                sys.stderr.write(str(e) + "\n")
             _debug("collected dir %s\n" % CLOUDINIT_RUN_DIR, 1, verbosity)
         else:
-            _debug("directory '%s' did not exist\n" % CLOUDINIT_RUN_DIR, 1,
-                   verbosity)
+            _debug(
+                "directory '%s' did not exist\n" % CLOUDINIT_RUN_DIR,
+                1,
+                verbosity,
+            )
         with chdir(tmp_dir):
-            subp(['tar', 'czvf', tarfile, log_dir.replace(tmp_dir + '/', '')])
+            subp(["tar", "czvf", tarfile, log_dir.replace(tmp_dir + "/", "")])
     sys.stderr.write("Wrote %s\n" % tarfile)
     return 0
 
@@ -152,10 +184,10 @@ def handle_collect_logs_args(name, args):
 def main():
     """Tool to collect and tar all cloud-init related logs."""
     parser = get_parser()
-    return handle_collect_logs_args('collect-logs', parser.parse_args())
+    return handle_collect_logs_args("collect-logs", parser.parse_args())
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/cmd/devel/make_mime.py b/cloudinit/cmd/devel/make_mime.py
index 4e6a5778..a7493c74 100755
--- a/cloudinit/cmd/devel/make_mime.py
+++ b/cloudinit/cmd/devel/make_mime.py
@@ -9,19 +9,22 @@ from email.mime.text import MIMEText
 
 from cloudinit import log
 from cloudinit.handlers import INCLUSION_TYPES_MAP
+
 from . import addLogHandlerCLI
 
-NAME = 'make-mime'
+NAME = "make-mime"
 LOG = log.getLogger(NAME)
-EPILOG = ("Example: make-mime -a config.yaml:cloud-config "
-          "-a script.sh:x-shellscript > user-data")
+EPILOG = (
+    "Example: make-mime -a config.yaml:cloud-config "
+    "-a script.sh:x-shellscript > user-data"
+)
 
 
 def file_content_type(text):
-    """ Return file content type by reading the first line of the input. """
+    """Return file content type by reading the first line of the input."""
     try:
         filename, content_type = text.split(":", 1)
-        return (open(filename, 'r'), filename, content_type.strip())
+        return (open(filename, "r"), filename, content_type.strip())
     except ValueError as e:
         raise argparse.ArgumentError(
             text, "Invalid value for %r" % (text)
@@ -41,26 +44,43 @@ def get_parser(parser=None):
     # update the parser's doc and add an epilog to show an example
     parser.description = __doc__
     parser.epilog = EPILOG
-    parser.add_argument("-a", "--attach", dest="files", type=file_content_type,
-                        action='append', default=[],
-                        metavar="<file>:<content-type>",
-                        help=("attach the given file as the specified "
-                              "content-type"))
-    parser.add_argument('-l', '--list-types', action='store_true',
-                        default=False,
-                        help='List support cloud-init content types.')
-    parser.add_argument('-f', '--force', action='store_true',
-                        default=False,
-                        help='Ignore unknown content-type warnings')
+    parser.add_argument(
+        "-a",
+        "--attach",
+        dest="files",
+        type=file_content_type,
+        action="append",
+        default=[],
+        metavar="<file>:<content-type>",
+        help="attach the given file as the specified content-type",
+    )
+    parser.add_argument(
+        "-l",
+        "--list-types",
+        action="store_true",
+        default=False,
+        help="List support cloud-init content types.",
+    )
+    parser.add_argument(
+        "-f",
+        "--force",
+        action="store_true",
+        default=False,
+        help="Ignore unknown content-type warnings",
+    )
     return parser
 
 
 def get_content_types(strip_prefix=False):
-    """ Return a list of cloud-init supported content types.  Optionally
-        strip out the leading 'text/' of the type if strip_prefix=True.
+    """Return a list of cloud-init supported content types.  Optionally
+    strip out the leading 'text/' of the type if strip_prefix=True.
     """
-    return sorted([ctype.replace("text/", "") if strip_prefix else ctype
-                   for ctype in INCLUSION_TYPES_MAP.values()])
+    return sorted(
+        [
+            ctype.replace("text/", "") if strip_prefix else ctype
+            for ctype in INCLUSION_TYPES_MAP.values()
+        ]
+    )
 
 
 def handle_args(name, args):
@@ -82,14 +102,16 @@ def handle_args(name, args):
     for i, (fh, filename, format_type) in enumerate(args.files):
         contents = fh.read()
         sub_message = MIMEText(contents, format_type, sys.getdefaultencoding())
-        sub_message.add_header('Content-Disposition',
-                               'attachment; filename="%s"' % (filename))
+        sub_message.add_header(
+            "Content-Disposition", 'attachment; filename="%s"' % (filename)
+        )
         content_type = sub_message.get_content_type().lower()
         if content_type not in get_content_types():
             level = "WARNING" if args.force else "ERROR"
-            msg = (level + ": content type %r for attachment %s "
-                   "may be incorrect!") % (content_type, i + 1)
-            sys.stderr.write(msg + '\n')
+            msg = (
+                level + ": content type %r for attachment %s may be incorrect!"
+            ) % (content_type, i + 1)
+            sys.stderr.write(msg + "\n")
             errors.append(msg)
         sub_messages.append(sub_message)
     if len(errors) and not args.force:
@@ -104,10 +126,10 @@ def handle_args(name, args):
 
 def main():
     args = get_parser().parse_args()
-    return(handle_args(NAME, args))
+    return handle_args(NAME, args)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())
 
 
diff --git a/cloudinit/cmd/devel/net_convert.py b/cloudinit/cmd/devel/net_convert.py
index f4a98e5e..18b1e7ff 100755
--- a/cloudinit/cmd/devel/net_convert.py
+++ b/cloudinit/cmd/devel/net_convert.py
@@ -6,15 +6,13 @@ import json
 import os
 import sys
 
-from cloudinit.sources.helpers import openstack
+from cloudinit import distros, log, safeyaml
+from cloudinit.net import eni, netplan, network_state, networkd, sysconfig
 from cloudinit.sources import DataSourceAzure as azure
 from cloudinit.sources import DataSourceOVF as ovf
+from cloudinit.sources.helpers import openstack
 
-from cloudinit import distros, safeyaml
-from cloudinit.net import eni, netplan, networkd, network_state, sysconfig
-from cloudinit import log
-
-NAME = 'net-convert'
+NAME = "net-convert"
 
 
 def get_parser(parser=None):
@@ -27,33 +25,59 @@ def get_parser(parser=None):
     """
     if not parser:
         parser = argparse.ArgumentParser(prog=NAME, description=__doc__)
-    parser.add_argument("-p", "--network-data", type=open,
-                        metavar="PATH", required=True,
-                        help="The network configuration to read")
-    parser.add_argument("-k", "--kind",
-                        choices=['eni', 'network_data.json', 'yaml',
-                                 'azure-imds', 'vmware-imc'],
-                        required=True,
-                        help="The format of the given network config")
-    parser.add_argument("-d", "--directory",
-                        metavar="PATH",
-                        help="directory to place output in",
-                        required=True)
-    parser.add_argument("-D", "--distro",
-                        choices=[item for sublist in
-                                 distros.OSFAMILIES.values()
-                                 for item in sublist],
-                        required=True)
-    parser.add_argument("-m", "--mac",
-                        metavar="name,mac",
-                        action='append',
-                        help="interface name to mac mapping")
-    parser.add_argument("--debug", action='store_true',
-                        help='enable debug logging to stderr.')
-    parser.add_argument("-O", "--output-kind",
-                        choices=['eni', 'netplan', 'networkd', 'sysconfig'],
-                        required=True,
-                        help="The network config format to emit")
+    parser.add_argument(
+        "-p",
+        "--network-data",
+        type=open,
+        metavar="PATH",
+        required=True,
+        help="The network configuration to read",
+    )
+    parser.add_argument(
+        "-k",
+        "--kind",
+        choices=[
+            "eni",
+            "network_data.json",
+            "yaml",
+            "azure-imds",
+            "vmware-imc",
+        ],
+        required=True,
+        help="The format of the given network config",
+    )
+    parser.add_argument(
+        "-d",
+        "--directory",
+        metavar="PATH",
+        help="directory to place output in",
+        required=True,
+    )
+    parser.add_argument(
+        "-D",
+        "--distro",
+        choices=[
+            item for sublist in distros.OSFAMILIES.values() for item in sublist
+        ],
+        required=True,
+    )
+    parser.add_argument(
+        "-m",
+        "--mac",
+        metavar="name,mac",
+        action="append",
+        help="interface name to mac mapping",
+    )
+    parser.add_argument(
+        "--debug", action="store_true", help="enable debug logging to stderr."
+    )
+    parser.add_argument(
+        "-O",
+        "--output-kind",
+        choices=["eni", "netplan", "networkd", "sysconfig"],
+        required=True,
+        help="The network config format to emit",
+    )
     return parser
 
 
@@ -81,59 +105,68 @@ def handle_args(name, args):
         pre_ns = eni.convert_eni_data(net_data)
     elif args.kind == "yaml":
         pre_ns = safeyaml.load(net_data)
-        if 'network' in pre_ns:
-            pre_ns = pre_ns.get('network')
+        if "network" in pre_ns:
+            pre_ns = pre_ns.get("network")
         if args.debug:
-            sys.stderr.write('\n'.join(
-                ["Input YAML", safeyaml.dumps(pre_ns), ""]))
-    elif args.kind == 'network_data.json':
+            sys.stderr.write(
+                "\n".join(["Input YAML", safeyaml.dumps(pre_ns), ""])
+            )
+    elif args.kind == "network_data.json":
         pre_ns = openstack.convert_net_json(
-            json.loads(net_data), known_macs=known_macs)
-    elif args.kind == 'azure-imds':
+            json.loads(net_data), known_macs=known_macs
+        )
+    elif args.kind == "azure-imds":
         pre_ns = azure.parse_network_config(json.loads(net_data))
-    elif args.kind == 'vmware-imc':
+    elif args.kind == "vmware-imc":
         config = ovf.Config(ovf.ConfigFile(args.network_data.name))
         pre_ns = ovf.get_network_config_from_conf(config, False)
 
     ns = network_state.parse_net_config_data(pre_ns)
 
     if args.debug:
-        sys.stderr.write('\n'.join(
-            ["", "Internal State", safeyaml.dumps(ns), ""]))
+        sys.stderr.write(
+            "\n".join(["", "Internal State", safeyaml.dumps(ns), ""])
+        )
     distro_cls = distros.fetch(args.distro)
     distro = distro_cls(args.distro, {}, None)
     config = {}
     if args.output_kind == "eni":
         r_cls = eni.Renderer
-        config = distro.renderer_configs.get('eni')
+        config = distro.renderer_configs.get("eni")
     elif args.output_kind == "netplan":
         r_cls = netplan.Renderer
-        config = distro.renderer_configs.get('netplan')
+        config = distro.renderer_configs.get("netplan")
         # don't run netplan generate/apply
-        config['postcmds'] = False
+        config["postcmds"] = False
         # trim leading slash
-        config['netplan_path'] = config['netplan_path'][1:]
+        config["netplan_path"] = config["netplan_path"][1:]
         # enable some netplan features
-        config['features'] = ['dhcp-use-domains', 'ipv6-mtu']
+        config["features"] = ["dhcp-use-domains", "ipv6-mtu"]
     elif args.output_kind == "networkd":
         r_cls = networkd.Renderer
-        config = distro.renderer_configs.get('networkd')
+        config = distro.renderer_configs.get("networkd")
     elif args.output_kind == "sysconfig":
         r_cls = sysconfig.Renderer
-        config = distro.renderer_configs.get('sysconfig')
+        config = distro.renderer_configs.get("sysconfig")
     else:
         raise RuntimeError("Invalid output_kind")
 
     r = r_cls(config=config)
-    sys.stderr.write(''.join([
-        "Read input format '%s' from '%s'.\n" % (
-            args.kind, args.network_data.name),
-        "Wrote output format '%s' to '%s'\n" % (
-            args.output_kind, args.directory)]) + "\n")
+    sys.stderr.write(
+        "".join(
+            [
+                "Read input format '%s' from '%s'.\n"
+                % (args.kind, args.network_data.name),
+                "Wrote output format '%s' to '%s'\n"
+                % (args.output_kind, args.directory),
+            ]
+        )
+        + "\n"
+    )
     r.render_network_state(network_state=ns, target=args.directory)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     args = get_parser().parse_args()
     handle_args(NAME, args)
 
diff --git a/cloudinit/cmd/devel/parser.py b/cloudinit/cmd/devel/parser.py
index be304630..76b16c2e 100644
--- a/cloudinit/cmd/devel/parser.py
+++ b/cloudinit/cmd/devel/parser.py
@@ -5,33 +5,47 @@
 """Define 'devel' subcommand argument parsers to include in cloud-init cmd."""
 
 import argparse
+
 from cloudinit.config import schema
 
-from . import hotplug_hook
-from . import net_convert
-from . import render
-from . import make_mime
+from . import hotplug_hook, make_mime, net_convert, render
 
 
 def get_parser(parser=None):
     if not parser:
         parser = argparse.ArgumentParser(
-            prog='cloudinit-devel',
-            description='Run development cloud-init tools')
-    subparsers = parser.add_subparsers(title='Subcommands', dest='subcommand')
+            prog="cloudinit-devel",
+            description="Run development cloud-init tools",
+        )
+    subparsers = parser.add_subparsers(title="Subcommands", dest="subcommand")
     subparsers.required = True
 
     subcmds = [
-        (hotplug_hook.NAME, hotplug_hook.__doc__,
-         hotplug_hook.get_parser, hotplug_hook.handle_args),
-        ('schema', 'Validate cloud-config files for document schema',
-         schema.get_parser, schema.handle_schema_args),
-        (net_convert.NAME, net_convert.__doc__,
-         net_convert.get_parser, net_convert.handle_args),
-        (render.NAME, render.__doc__,
-         render.get_parser, render.handle_args),
-        (make_mime.NAME, make_mime.__doc__,
-         make_mime.get_parser, make_mime.handle_args),
+        (
+            hotplug_hook.NAME,
+            hotplug_hook.__doc__,
+            hotplug_hook.get_parser,
+            hotplug_hook.handle_args,
+        ),
+        (
+            "schema",
+            "Validate cloud-config files for document schema",
+            schema.get_parser,
+            schema.handle_schema_args,
+        ),
+        (
+            net_convert.NAME,
+            net_convert.__doc__,
+            net_convert.get_parser,
+            net_convert.handle_args,
+        ),
+        (render.NAME, render.__doc__, render.get_parser, render.handle_args),
+        (
+            make_mime.NAME,
+            make_mime.__doc__,
+            make_mime.get_parser,
+            make_mime.handle_args,
+        ),
     ]
     for (subcmd, helpmsg, get_parser, handler) in subcmds:
         parser = subparsers.add_parser(subcmd, help=helpmsg)
diff --git a/cloudinit/cmd/devel/render.py b/cloudinit/cmd/devel/render.py
index 1090aa16..2f9a22a8 100755
--- a/cloudinit/cmd/devel/render.py
+++ b/cloudinit/cmd/devel/render.py
@@ -6,12 +6,13 @@ import argparse
 import os
 import sys
 
-from cloudinit.handlers.jinja_template import render_jinja_payload_from_file
 from cloudinit import log
+from cloudinit.handlers.jinja_template import render_jinja_payload_from_file
 from cloudinit.sources import INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE
+
 from . import addLogHandlerCLI, read_cfg_paths
 
-NAME = 'render'
+NAME = "render"
 
 LOG = log.getLogger(NAME)
 
@@ -27,13 +28,24 @@ def get_parser(parser=None):
     if not parser:
         parser = argparse.ArgumentParser(prog=NAME, description=__doc__)
     parser.add_argument(
-        'user_data', type=str, help='Path to the user-data file to render')
+        "user_data", type=str, help="Path to the user-data file to render"
+    )
+    parser.add_argument(
+        "-i",
+        "--instance-data",
+        type=str,
+        help=(
+            "Optional path to instance-data.json file. Defaults to"
+            " /run/cloud-init/instance-data.json"
+        ),
+    )
     parser.add_argument(
-        '-i', '--instance-data', type=str,
-        help=('Optional path to instance-data.json file. Defaults to'
-              ' /run/cloud-init/instance-data.json'))
-    parser.add_argument('-d', '--debug', action='store_true', default=False,
-                        help='Add verbose messages during template render')
+        "-d",
+        "--debug",
+        action="store_true",
+        default=False,
+        help="Add verbose messages during template render",
+    )
     return parser
 
 
@@ -54,34 +66,38 @@ def handle_args(name, args):
         redacted_data_fn = os.path.join(paths.run_dir, INSTANCE_JSON_FILE)
         if uid == 0:
             instance_data_fn = os.path.join(
-                paths.run_dir, INSTANCE_JSON_SENSITIVE_FILE)
+                paths.run_dir, INSTANCE_JSON_SENSITIVE_FILE
+            )
             if not os.path.exists(instance_data_fn):
                 LOG.warning(
-                    'Missing root-readable %s. Using redacted %s instead.',
-                    instance_data_fn, redacted_data_fn
+                    "Missing root-readable %s. Using redacted %s instead.",
+                    instance_data_fn,
+                    redacted_data_fn,
                 )
                 instance_data_fn = redacted_data_fn
         else:
             instance_data_fn = redacted_data_fn
     if not os.path.exists(instance_data_fn):
-        LOG.error('Missing instance-data.json file: %s', instance_data_fn)
+        LOG.error("Missing instance-data.json file: %s", instance_data_fn)
         return 1
     try:
         with open(args.user_data) as stream:
             user_data = stream.read()
     except IOError:
-        LOG.error('Missing user-data file: %s', args.user_data)
+        LOG.error("Missing user-data file: %s", args.user_data)
         return 1
     try:
         rendered_payload = render_jinja_payload_from_file(
-            payload=user_data, payload_fn=args.user_data,
+            payload=user_data,
+            payload_fn=args.user_data,
             instance_data_file=instance_data_fn,
-            debug=True if args.debug else False)
+            debug=True if args.debug else False,
+        )
     except RuntimeError as e:
-        LOG.error('Cannot render from instance data: %s', str(e))
+        LOG.error("Cannot render from instance data: %s", str(e))
         return 1
     if not rendered_payload:
-        LOG.error('Unable to render user-data file: %s', args.user_data)
+        LOG.error("Unable to render user-data file: %s", args.user_data)
         return 1
     sys.stdout.write(rendered_payload)
     return 0
@@ -89,10 +105,10 @@ def handle_args(name, args):
 
 def main():
     args = get_parser().parse_args()
-    return(handle_args(NAME, args))
+    return handle_args(NAME, args)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())
 
 
diff --git a/cloudinit/cmd/main.py b/cloudinit/cmd/main.py
index 63186d34..e67edbc3 100644
--- a/cloudinit/cmd/main.py
+++ b/cloudinit/cmd/main.py
@@ -19,6 +19,7 @@ import time
 import traceback
 
 from cloudinit import patcher
+
 patcher.patch_logging()
 
 from cloudinit import log as logging
@@ -34,8 +35,7 @@ from cloudinit import warnings
 from cloudinit import reporting
 from cloudinit.reporting import events
 
-from cloudinit.settings import (PER_INSTANCE, PER_ALWAYS, PER_ONCE,
-                                CLOUD_CONFIG)
+from cloudinit.settings import PER_INSTANCE, PER_ALWAYS, PER_ONCE, CLOUD_CONFIG
 
 from cloudinit import atomic_helper
 
@@ -44,8 +44,10 @@ from cloudinit import dhclient_hook
 
 
 # Welcome message template
-WELCOME_MSG_TPL = ("Cloud-init v. {version} running '{action}' at "
-                   "{timestamp}. Up {uptime} seconds.")
+WELCOME_MSG_TPL = (
+    "Cloud-init v. {version} running '{action}' at "
+    "{timestamp}. Up {uptime} seconds."
+)
 
 # Module section template
 MOD_SECTION_TPL = "cloud_%s_modules"
@@ -53,9 +55,9 @@ MOD_SECTION_TPL = "cloud_%s_modules"
 # Frequency shortname to full name
 # (so users don't have to remember the full name...)
 FREQ_SHORT_NAMES = {
-    'instance': PER_INSTANCE,
-    'always': PER_ALWAYS,
-    'once': PER_ONCE,
+    "instance": PER_INSTANCE,
+    "always": PER_ALWAYS,
+    "once": PER_ONCE,
 }
 
 LOG = logging.getLogger()
@@ -63,21 +65,20 @@ LOG = logging.getLogger()
 
 # Used for when a logger may not be active
 # and we still want to print exceptions...
-def print_exc(msg=''):
+def print_exc(msg=""):
     if msg:
         sys.stderr.write("%s\n" % (msg))
-    sys.stderr.write('-' * 60)
+    sys.stderr.write("-" * 60)
     sys.stderr.write("\n")
     traceback.print_exc(file=sys.stderr)
-    sys.stderr.write('-' * 60)
+    sys.stderr.write("-" * 60)
     sys.stderr.write("\n")
 
 
 def welcome(action, msg=None):
     if not msg:
         msg = welcome_format(action)
-    util.multi_log("%s\n" % (msg),
-                   console=False, stderr=True, log=LOG)
+    util.multi_log("%s\n" % (msg), console=False, stderr=True, log=LOG)
     return msg
 
 
@@ -86,7 +87,8 @@ def welcome_format(action):
         version=version.version_string(),
         uptime=util.uptime(),
         timestamp=util.time_rfc2822(),
-        action=action)
+        action=action,
+    )
 
 
 def extract_fns(args):
@@ -107,29 +109,31 @@ def run_module_section(mods, action_name, section):
     (which_ran, failures) = mods.run_section(full_section_name)
     total_attempted = len(which_ran) + len(failures)
     if total_attempted == 0:
-        msg = ("No '%s' modules to run"
-               " under section '%s'") % (action_name, full_section_name)
+        msg = "No '%s' modules to run under section '%s'" % (
+            action_name,
+            full_section_name,
+        )
         sys.stderr.write("%s\n" % (msg))
         LOG.debug(msg)
         return []
     else:
-        LOG.debug("Ran %s modules with %s failures",
-                  len(which_ran), len(failures))
+        LOG.debug(
+            "Ran %s modules with %s failures", len(which_ran), len(failures)
+        )
         return failures
 
 
 def apply_reporting_cfg(cfg):
-    if cfg.get('reporting'):
-        reporting.update_configuration(cfg.get('reporting'))
+    if cfg.get("reporting"):
+        reporting.update_configuration(cfg.get("reporting"))
 
 
-def parse_cmdline_url(cmdline, names=('cloud-config-url', 'url')):
+def parse_cmdline_url(cmdline, names=("cloud-config-url", "url")):
     data = util.keyval_str_to_dict(cmdline)
     for key in names:
         if key in data:
             return key, data[key]
-    raise KeyError("No keys (%s) found in string '%s'" %
-                   (cmdline, names))
+    raise KeyError("No keys (%s) found in string '%s'" % (cmdline, names))
 
 
 def attempt_cmdline_url(path, network=True, cmdline=None):
@@ -163,51 +167,60 @@ def attempt_cmdline_url(path, network=True, cmdline=None):
 
     if path_is_local and os.path.exists(path):
         if network:
-            m = ("file '%s' existed, possibly from local stage download"
-                 " of command line url '%s'. Not re-writing." % (path, url))
+            m = (
+                "file '%s' existed, possibly from local stage download"
+                " of command line url '%s'. Not re-writing." % (path, url)
+            )
             level = logging.INFO
             if path_is_local:
                 level = logging.DEBUG
         else:
-            m = ("file '%s' existed, possibly from previous boot download"
-                 " of command line url '%s'. Not re-writing." % (path, url))
+            m = (
+                "file '%s' existed, possibly from previous boot download"
+                " of command line url '%s'. Not re-writing." % (path, url)
+            )
             level = logging.WARN
 
         return (level, m)
 
-    kwargs = {'url': url, 'timeout': 10, 'retries': 2}
+    kwargs = {"url": url, "timeout": 10, "retries": 2}
     if network or path_is_local:
         level = logging.WARN
-        kwargs['sec_between'] = 1
+        kwargs["sec_between"] = 1
     else:
         level = logging.DEBUG
-        kwargs['sec_between'] = .1
+        kwargs["sec_between"] = 0.1
 
     data = None
-    header = b'#cloud-config'
+    header = b"#cloud-config"
     try:
         resp = url_helper.read_file_or_url(**kwargs)
         if resp.ok():
             data = resp.contents
             if not resp.contents.startswith(header):
-                if cmdline_name == 'cloud-config-url':
+                if cmdline_name == "cloud-config-url":
                     level = logging.WARN
                 else:
                     level = logging.INFO
                 return (
                     level,
-                    "contents of '%s' did not start with %s" % (url, header))
+                    "contents of '%s' did not start with %s" % (url, header),
+                )
         else:
-            return (level,
-                    "url '%s' returned code %s. Ignoring." % (url, resp.code))
+            return (
+                level,
+                "url '%s' returned code %s. Ignoring." % (url, resp.code),
+            )
 
     except url_helper.UrlError as e:
         return (level, "retrieving url '%s' failed: %s" % (url, e))
 
     util.write_file(path, data, mode=0o600)
-    return (logging.INFO,
-            "wrote cloud-config data from %s='%s' to %s" %
-            (cmdline_name, url, path))
+    return (
+        logging.INFO,
+        "wrote cloud-config data from %s='%s' to %s"
+        % (cmdline_name, url, path),
+    )
 
 
 def purge_cache_on_python_version_change(init):
@@ -216,31 +229,32 @@ def purge_cache_on_python_version_change(init):
     There could be changes not represented in our cache (obj.pkl) after we
     upgrade to a new version of python, so at that point clear the cache
     """
-    current_python_version = '%d.%d' % (
-        sys.version_info.major, sys.version_info.minor
+    current_python_version = "%d.%d" % (
+        sys.version_info.major,
+        sys.version_info.minor,
     )
     python_version_path = os.path.join(
-        init.paths.get_cpath('data'), 'python-version'
+        init.paths.get_cpath("data"), "python-version"
     )
     if os.path.exists(python_version_path):
         cached_python_version = open(python_version_path).read()
         # The Python version has changed out from under us, anything that was
         # pickled previously is likely useless due to API changes.
         if cached_python_version != current_python_version:
-            LOG.debug('Python version change detected. Purging cache')
+            LOG.debug("Python version change detected. Purging cache")
             init.purge_cache(True)
             util.write_file(python_version_path, current_python_version)
     else:
-        if os.path.exists(init.paths.get_ipath_cur('obj_pkl')):
+        if os.path.exists(init.paths.get_ipath_cur("obj_pkl")):
             LOG.info(
-                'Writing python-version file. '
-                'Cache compatibility status is currently unknown.'
+                "Writing python-version file. "
+                "Cache compatibility status is currently unknown."
             )
         util.write_file(python_version_path, current_python_version)
 
 
 def _should_bring_up_interfaces(init, args):
-    if util.get_cfg_option_bool(init.cfg, 'disable_network_activation'):
+    if util.get_cfg_option_bool(init.cfg, "disable_network_activation"):
         return False
     return not args.local
 
@@ -250,10 +264,14 @@ def main_init(name, args):
     if args.local:
         deps = [sources.DEP_FILESYSTEM]
 
-    early_logs = [attempt_cmdline_url(
-        path=os.path.join("%s.d" % CLOUD_CONFIG,
-                          "91_kernel_cmdline_url.cfg"),
-        network=not args.local)]
+    early_logs = [
+        attempt_cmdline_url(
+            path=os.path.join(
+                "%s.d" % CLOUD_CONFIG, "91_kernel_cmdline_url.cfg"
+            ),
+            network=not args.local,
+        )
+    ]
 
     # Cloud-init 'init' stage is broken up into the following sub-stages
     # 1. Ensure that the init object fetches its config without errors
@@ -289,8 +307,9 @@ def main_init(name, args):
         early_logs.append((logging.WARN, msg))
     if args.debug:
         # Reset so that all the debug handlers are closed out
-        LOG.debug(("Logging being reset, this logger may no"
-                   " longer be active shortly"))
+        LOG.debug(
+            "Logging being reset, this logger may no longer be active shortly"
+        )
         logging.resetLogging()
     logging.setupLogging(init.cfg)
     apply_reporting_cfg(init.cfg)
@@ -317,9 +336,11 @@ def main_init(name, args):
     if mode == sources.DSMODE_NETWORK:
         existing = "trust"
         sys.stderr.write("%s\n" % (netinfo.debug_info()))
-        LOG.debug(("Checking to see if files that we need already"
-                   " exist from a previous run that would allow us"
-                   " to stop early."))
+        LOG.debug(
+            "Checking to see if files that we need already"
+            " exist from a previous run that would allow us"
+            " to stop early."
+        )
         # no-net is written by upstart cloud-init-nonet when network failed
         # to come up
         stop_files = [
@@ -331,15 +352,18 @@ def main_init(name, args):
                 existing_files.append(fn)
 
         if existing_files:
-            LOG.debug("[%s] Exiting. stop file %s existed",
-                      mode, existing_files)
+            LOG.debug(
+                "[%s] Exiting. stop file %s existed", mode, existing_files
+            )
             return (None, [])
         else:
-            LOG.debug("Execution continuing, no previous run detected that"
-                      " would allow us to stop early.")
+            LOG.debug(
+                "Execution continuing, no previous run detected that"
+                " would allow us to stop early."
+            )
     else:
         existing = "check"
-        mcfg = util.get_cfg_option_bool(init.cfg, 'manual_cache_clean', False)
+        mcfg = util.get_cfg_option_bool(init.cfg, "manual_cache_clean", False)
         if mcfg:
             LOG.debug("manual cache clean set from config")
             existing = "trust"
@@ -360,8 +384,11 @@ def main_init(name, args):
         # if in network mode, and the datasource is local
         # then work was done at that stage.
         if mode == sources.DSMODE_NETWORK and init.datasource.dsmode != mode:
-            LOG.debug("[%s] Exiting. datasource %s in local mode",
-                      mode, init.datasource)
+            LOG.debug(
+                "[%s] Exiting. datasource %s in local mode",
+                mode,
+                init.datasource,
+            )
             return (None, [])
     except sources.DataSourceNotFoundException:
         # In the case of 'cloud-init init' without '--local' it is a bit
@@ -371,8 +398,9 @@ def main_init(name, args):
         if mode == sources.DSMODE_LOCAL:
             LOG.debug("No local datasource found")
         else:
-            util.logexc(LOG, ("No instance datasource found!"
-                              " Likely bad things to come!"))
+            util.logexc(
+                LOG, "No instance datasource found! Likely bad things to come!"
+            )
         if not args.force:
             init.apply_network_config(bring_up=bring_up_interfaces)
             LOG.debug("[%s] Exiting without datasource", mode)
@@ -381,46 +409,60 @@ def main_init(name, args):
             else:
                 return (None, ["No instance datasource found."])
         else:
-            LOG.debug("[%s] barreling on in force mode without datasource",
-                      mode)
+            LOG.debug(
+                "[%s] barreling on in force mode without datasource", mode
+            )
 
     _maybe_persist_instance_data(init)
     # Stage 6
     iid = init.instancify()
-    LOG.debug("[%s] %s will now be targeting instance id: %s. new=%s",
-              mode, name, iid, init.is_new_instance())
+    LOG.debug(
+        "[%s] %s will now be targeting instance id: %s. new=%s",
+        mode,
+        name,
+        iid,
+        init.is_new_instance(),
+    )
 
     if mode == sources.DSMODE_LOCAL:
         # Before network comes up, set any configured hostname to allow
         # dhcp clients to advertize this hostname to any DDNS services
         # LP: #1746455.
-        _maybe_set_hostname(init, stage='local', retry_stage='network')
+        _maybe_set_hostname(init, stage="local", retry_stage="network")
     init.apply_network_config(bring_up=bring_up_interfaces)
 
     if mode == sources.DSMODE_LOCAL:
         if init.datasource.dsmode != mode:
-            LOG.debug("[%s] Exiting. datasource %s not in local mode.",
-                      mode, init.datasource)
+            LOG.debug(
+                "[%s] Exiting. datasource %s not in local mode.",
+                mode,
+                init.datasource,
+            )
             return (init.datasource, [])
         else:
-            LOG.debug("[%s] %s is in local mode, will apply init modules now.",
-                      mode, init.datasource)
+            LOG.debug(
+                "[%s] %s is in local mode, will apply init modules now.",
+                mode,
+                init.datasource,
+            )
 
     # Give the datasource a chance to use network resources.
     # This is used on Azure to communicate with the fabric over network.
     init.setup_datasource()
     # update fully realizes user-data (pulling in #include if necessary)
     init.update()
-    _maybe_set_hostname(init, stage='init-net', retry_stage='modules:config')
+    _maybe_set_hostname(init, stage="init-net", retry_stage="modules:config")
     # Stage 7
     try:
         # Attempt to consume the data per instance.
         # This may run user-data handlers and/or perform
         # url downloads and such as needed.
-        (ran, _results) = init.cloudify().run('consume_data',
-                                              init.consume_data,
-                                              args=[PER_INSTANCE],
-                                              freq=PER_INSTANCE)
+        (ran, _results) = init.cloudify().run(
+            "consume_data",
+            init.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
         if not ran:
             # Just consume anything that is set to run per-always
             # if nothing ran in the per-instance code
@@ -442,8 +484,7 @@ def main_init(name, args):
         errfmt_orig = errfmt
         (outfmt, errfmt) = util.get_output_cfg(mods.cfg, name)
         if outfmt_orig != outfmt or errfmt_orig != errfmt:
-            LOG.warning("Stdout, stderr changing to (%s, %s)",
-                        outfmt, errfmt)
+            LOG.warning("Stdout, stderr changing to (%s, %s)", outfmt, errfmt)
             (outfmt, errfmt) = util.fixup_output(mods.cfg, name)
     except Exception:
         util.logexc(LOG, "Failed to re-adjust output redirection!")
@@ -459,11 +500,11 @@ def main_init(name, args):
 
 
 def di_report_warn(datasource, cfg):
-    if 'di_report' not in cfg:
+    if "di_report" not in cfg:
         LOG.debug("no di_report found in config.")
         return
 
-    dicfg = cfg['di_report']
+    dicfg = cfg["di_report"]
     if dicfg is None:
         # ds-identify may write 'di_report:\n #comment\n'
         # which reads as {'di_report': None}
@@ -474,7 +515,7 @@ def di_report_warn(datasource, cfg):
         LOG.warning("di_report config not a dictionary: %s", dicfg)
         return
 
-    dslist = dicfg.get('datasource_list')
+    dslist = dicfg.get("datasource_list")
     if dslist is None:
         LOG.warning("no 'datasource_list' found in di_report.")
         return
@@ -486,18 +527,26 @@ def di_report_warn(datasource, cfg):
     # where Name is the thing that shows up in datasource_list.
     modname = datasource.__module__.rpartition(".")[2]
     if modname.startswith(sources.DS_PREFIX):
-        modname = modname[len(sources.DS_PREFIX):]
+        modname = modname[len(sources.DS_PREFIX) :]
     else:
-        LOG.warning("Datasource '%s' came from unexpected module '%s'.",
-                    datasource, modname)
+        LOG.warning(
+            "Datasource '%s' came from unexpected module '%s'.",
+            datasource,
+            modname,
+        )
 
     if modname in dslist:
-        LOG.debug("used datasource '%s' from '%s' was in di_report's list: %s",
-                  datasource, modname, dslist)
+        LOG.debug(
+            "used datasource '%s' from '%s' was in di_report's list: %s",
+            datasource,
+            modname,
+            dslist,
+        )
         return
 
-    warnings.show_warning('dsid_missing_source', cfg,
-                          source=modname, dslist=str(dslist))
+    warnings.show_warning(
+        "dsid_missing_source", cfg, source=modname, dslist=str(dslist)
+    )
 
 
 def main_modules(action_name, args):
@@ -521,8 +570,10 @@ def main_modules(action_name, args):
         init.fetch(existing="trust")
     except sources.DataSourceNotFoundException:
         # There was no datasource found, theres nothing to do
-        msg = ('Can not apply stage %s, no datasource found! Likely bad '
-               'things to come!' % name)
+        msg = (
+            "Can not apply stage %s, no datasource found! Likely bad "
+            "things to come!" % name
+        )
         util.logexc(LOG, msg)
         print_exc(msg)
         if not args.force:
@@ -539,8 +590,9 @@ def main_modules(action_name, args):
         util.logexc(LOG, "Failed to setup output redirection!")
     if args.debug:
         # Reset so that all the debug handlers are closed out
-        LOG.debug(("Logging being reset, this logger may no"
-                   " longer be active shortly"))
+        LOG.debug(
+            "Logging being reset, this logger may no longer be active shortly"
+        )
         logging.resetLogging()
     logging.setupLogging(mods.cfg)
     apply_reporting_cfg(init.cfg)
@@ -573,10 +625,12 @@ def main_single(name, args):
         # There was no datasource found,
         # that might be bad (or ok) depending on
         # the module being ran (so continue on)
-        util.logexc(LOG, ("Failed to fetch your datasource,"
-                          " likely bad things to come!"))
-        print_exc(("Failed to fetch your datasource,"
-                   " likely bad things to come!"))
+        util.logexc(
+            LOG, "Failed to fetch your datasource, likely bad things to come!"
+        )
+        print_exc(
+            "Failed to fetch your datasource, likely bad things to come!"
+        )
         if not args.force:
             return 1
     _maybe_persist_instance_data(init)
@@ -598,8 +652,9 @@ def main_single(name, args):
         util.logexc(LOG, "Failed to setup output redirection!")
     if args.debug:
         # Reset so that all the debug handlers are closed out
-        LOG.debug(("Logging being reset, this logger may no"
-                   " longer be active shortly"))
+        LOG.debug(
+            "Logging being reset, this logger may no longer be active shortly"
+        )
         logging.resetLogging()
     logging.setupLogging(mods.cfg)
     apply_reporting_cfg(init.cfg)
@@ -608,9 +663,7 @@ def main_single(name, args):
     welcome(name, msg=w_msg)
 
     # Stage 5
-    (which_ran, failures) = mods.run_single(mod_name,
-                                            mod_args,
-                                            mod_freq)
+    (which_ran, failures) = mods.run_single(mod_name, mod_args, mod_freq)
     if failures:
         LOG.warning("Ran %s but it failed!", mod_name)
         return 1
@@ -633,7 +686,12 @@ def status_wrapper(name, args, data_d=None, link_d=None):
     result_path = os.path.join(data_d, "result.json")
     result_link = os.path.join(link_d, "result.json")
 
-    util.ensure_dirs((data_d, link_d,))
+    util.ensure_dirs(
+        (
+            data_d,
+            link_d,
+        )
+    )
 
     (_name, functor) = args.action
 
@@ -647,14 +705,20 @@ def status_wrapper(name, args, data_d=None, link_d=None):
     else:
         raise ValueError("unknown name: %s" % name)
 
-    modes = ('init', 'init-local', 'modules-init', 'modules-config',
-             'modules-final')
+    modes = (
+        "init",
+        "init-local",
+        "modules-init",
+        "modules-config",
+        "modules-final",
+    )
     if mode not in modes:
         raise ValueError(
-            "Invalid cloud init mode specified '{0}'".format(mode))
+            "Invalid cloud init mode specified '{0}'".format(mode)
+        )
 
     status = None
-    if mode == 'init-local':
+    if mode == "init-local":
         for f in (status_link, result_link, status_path, result_path):
             util.del_file(f)
     else:
@@ -664,45 +728,46 @@ def status_wrapper(name, args, data_d=None, link_d=None):
             pass
 
     nullstatus = {
-        'errors': [],
-        'start': None,
-        'finished': None,
+        "errors": [],
+        "start": None,
+        "finished": None,
     }
 
     if status is None:
-        status = {'v1': {}}
-        status['v1']['datasource'] = None
+        status = {"v1": {}}
+        status["v1"]["datasource"] = None
 
     for m in modes:
-        if m not in status['v1']:
-            status['v1'][m] = nullstatus.copy()
+        if m not in status["v1"]:
+            status["v1"][m] = nullstatus.copy()
 
-    v1 = status['v1']
-    v1['stage'] = mode
-    v1[mode]['start'] = time.time()
+    v1 = status["v1"]
+    v1["stage"] = mode
+    v1[mode]["start"] = time.time()
 
     atomic_helper.write_json(status_path, status)
-    util.sym_link(os.path.relpath(status_path, link_d), status_link,
-                  force=True)
+    util.sym_link(
+        os.path.relpath(status_path, link_d), status_link, force=True
+    )
 
     try:
         ret = functor(name, args)
-        if mode in ('init', 'init-local'):
+        if mode in ("init", "init-local"):
             (datasource, errors) = ret
             if datasource is not None:
-                v1['datasource'] = str(datasource)
+                v1["datasource"] = str(datasource)
         else:
             errors = ret
 
-        v1[mode]['errors'] = [str(e) for e in errors]
+        v1[mode]["errors"] = [str(e) for e in errors]
 
     except Exception as e:
         util.logexc(LOG, "failed stage %s", mode)
         print_exc("failed run of stage %s" % mode)
-        v1[mode]['errors'] = [str(e)]
+        v1[mode]["errors"] = [str(e)]
 
-    v1[mode]['finished'] = time.time()
-    v1['stage'] = None
+    v1[mode]["finished"] = time.time()
+    v1["stage"] = None
 
     atomic_helper.write_json(status_path, status)
 
@@ -710,23 +775,26 @@ def status_wrapper(name, args, data_d=None, link_d=None):
         # write the 'finished' file
         errors = []
         for m in modes:
-            if v1[m]['errors']:
-                errors.extend(v1[m].get('errors', []))
+            if v1[m]["errors"]:
+                errors.extend(v1[m].get("errors", []))
 
         atomic_helper.write_json(
-            result_path, {'v1': {'datasource': v1['datasource'],
-                          'errors': errors}})
-        util.sym_link(os.path.relpath(result_path, link_d), result_link,
-                      force=True)
+            result_path,
+            {"v1": {"datasource": v1["datasource"], "errors": errors}},
+        )
+        util.sym_link(
+            os.path.relpath(result_path, link_d), result_link, force=True
+        )
 
-    return len(v1[mode]['errors'])
+    return len(v1[mode]["errors"])
 
 
 def _maybe_persist_instance_data(init):
     """Write instance-data.json file if absent and datasource is restored."""
     if init.ds_restored:
         instance_data_file = os.path.join(
-            init.paths.run_dir, sources.INSTANCE_JSON_FILE)
+            init.paths.run_dir, sources.INSTANCE_JSON_FILE
+        )
         if not os.path.exists(instance_data_file):
             init.datasource.persist_instance_data()
 
@@ -739,18 +807,23 @@ def _maybe_set_hostname(init, stage, retry_stage):
     """
     cloud = init.cloudify()
     (hostname, _fqdn) = util.get_hostname_fqdn(
-        init.cfg, cloud, metadata_only=True)
+        init.cfg, cloud, metadata_only=True
+    )
     if hostname:  # meta-data or user-data hostname content
         try:
-            cc_set_hostname.handle('set-hostname', init.cfg, cloud, LOG, None)
+            cc_set_hostname.handle("set-hostname", init.cfg, cloud, LOG, None)
         except cc_set_hostname.SetHostnameError as e:
             LOG.debug(
-                'Failed setting hostname in %s stage. Will'
-                ' retry in %s stage. Error: %s.', stage, retry_stage, str(e))
+                "Failed setting hostname in %s stage. Will"
+                " retry in %s stage. Error: %s.",
+                stage,
+                retry_stage,
+                str(e),
+            )
 
 
 def main_features(name, args):
-    sys.stdout.write('\n'.join(sorted(version.FEATURES)) + '\n')
+    sys.stdout.write("\n".join(sorted(version.FEATURES)) + "\n")
 
 
 def main(sysv_args=None):
@@ -760,129 +833,182 @@ def main(sysv_args=None):
     sysv_args = sysv_args[1:]
 
     # Top level args
-    parser.add_argument('--version', '-v', action='version',
-                        version='%(prog)s ' + (version.version_string()))
-    parser.add_argument('--file', '-f', action='append',
-                        dest='files',
-                        help=('additional yaml configuration'
-                              ' files to use'),
-                        type=argparse.FileType('rb'))
-    parser.add_argument('--debug', '-d', action='store_true',
-                        help=('show additional pre-action'
-                              ' logging (default: %(default)s)'),
-                        default=False)
-    parser.add_argument('--force', action='store_true',
-                        help=('force running even if no datasource is'
-                              ' found (use at your own risk)'),
-                        dest='force',
-                        default=False)
+    parser.add_argument(
+        "--version",
+        "-v",
+        action="version",
+        version="%(prog)s " + (version.version_string()),
+    )
+    parser.add_argument(
+        "--file",
+        "-f",
+        action="append",
+        dest="files",
+        help="additional yaml configuration files to use",
+        type=argparse.FileType("rb"),
+    )
+    parser.add_argument(
+        "--debug",
+        "-d",
+        action="store_true",
+        help="show additional pre-action logging (default: %(default)s)",
+        default=False,
+    )
+    parser.add_argument(
+        "--force",
+        action="store_true",
+        help=(
+            "force running even if no datasource is"
+            " found (use at your own risk)"
+        ),
+        dest="force",
+        default=False,
+    )
 
     parser.set_defaults(reporter=None)
-    subparsers = parser.add_subparsers(title='Subcommands', dest='subcommand')
+    subparsers = parser.add_subparsers(title="Subcommands", dest="subcommand")
     subparsers.required = True
 
     # Each action and its sub-options (if any)
-    parser_init = subparsers.add_parser('init',
-                                        help=('initializes cloud-init and'
-                                              ' performs initial modules'))
-    parser_init.add_argument("--local", '-l', action='store_true',
-                             help="start in local mode (default: %(default)s)",
-                             default=False)
+    parser_init = subparsers.add_parser(
+        "init", help="initializes cloud-init and performs initial modules"
+    )
+    parser_init.add_argument(
+        "--local",
+        "-l",
+        action="store_true",
+        help="start in local mode (default: %(default)s)",
+        default=False,
+    )
     # This is used so that we can know which action is selected +
     # the functor to use to run this subcommand
-    parser_init.set_defaults(action=('init', main_init))
+    parser_init.set_defaults(action=("init", main_init))
 
     # These settings are used for the 'config' and 'final' stages
-    parser_mod = subparsers.add_parser('modules',
-                                       help=('activates modules using '
-                                             'a given configuration key'))
-    parser_mod.add_argument("--mode", '-m', action='store',
-                            help=("module configuration name "
-                                  "to use (default: %(default)s)"),
-                            default='config',
-                            choices=('init', 'config', 'final'))
-    parser_mod.set_defaults(action=('modules', main_modules))
+    parser_mod = subparsers.add_parser(
+        "modules", help="activates modules using a given configuration key"
+    )
+    parser_mod.add_argument(
+        "--mode",
+        "-m",
+        action="store",
+        help="module configuration name to use (default: %(default)s)",
+        default="config",
+        choices=("init", "config", "final"),
+    )
+    parser_mod.set_defaults(action=("modules", main_modules))
 
     # This subcommand allows you to run a single module
-    parser_single = subparsers.add_parser('single',
-                                          help=('run a single module '))
-    parser_single.add_argument("--name", '-n', action="store",
-                               help="module name to run",
-                               required=True)
-    parser_single.add_argument("--frequency", action="store",
-                               help=("frequency of the module"),
-                               required=False,
-                               choices=list(FREQ_SHORT_NAMES.keys()))
-    parser_single.add_argument("--report", action="store_true",
-                               help="enable reporting",
-                               required=False)
-    parser_single.add_argument("module_args", nargs="*",
-                               metavar='argument',
-                               help=('any additional arguments to'
-                                     ' pass to this module'))
-    parser_single.set_defaults(action=('single', main_single))
+    parser_single = subparsers.add_parser(
+        "single", help="run a single module "
+    )
+    parser_single.add_argument(
+        "--name",
+        "-n",
+        action="store",
+        help="module name to run",
+        required=True,
+    )
+    parser_single.add_argument(
+        "--frequency",
+        action="store",
+        help="frequency of the module",
+        required=False,
+        choices=list(FREQ_SHORT_NAMES.keys()),
+    )
+    parser_single.add_argument(
+        "--report",
+        action="store_true",
+        help="enable reporting",
+        required=False,
+    )
+    parser_single.add_argument(
+        "module_args",
+        nargs="*",
+        metavar="argument",
+        help="any additional arguments to pass to this module",
+    )
+    parser_single.set_defaults(action=("single", main_single))
 
     parser_query = subparsers.add_parser(
-        'query',
-        help='Query standardized instance metadata from the command line.')
+        "query",
+        help="Query standardized instance metadata from the command line.",
+    )
 
     parser_dhclient = subparsers.add_parser(
-        dhclient_hook.NAME, help=dhclient_hook.__doc__)
+        dhclient_hook.NAME, help=dhclient_hook.__doc__
+    )
     dhclient_hook.get_parser(parser_dhclient)
 
-    parser_features = subparsers.add_parser('features',
-                                            help=('list defined features'))
-    parser_features.set_defaults(action=('features', main_features))
+    parser_features = subparsers.add_parser(
+        "features", help="list defined features"
+    )
+    parser_features.set_defaults(action=("features", main_features))
 
     parser_analyze = subparsers.add_parser(
-        'analyze', help='Devel tool: Analyze cloud-init logs and data')
+        "analyze", help="Devel tool: Analyze cloud-init logs and data"
+    )
 
-    parser_devel = subparsers.add_parser(
-        'devel', help='Run development tools')
+    parser_devel = subparsers.add_parser("devel", help="Run development tools")
 
     parser_collect_logs = subparsers.add_parser(
-        'collect-logs', help='Collect and tar all cloud-init debug info')
+        "collect-logs", help="Collect and tar all cloud-init debug info"
+    )
 
     parser_clean = subparsers.add_parser(
-        'clean', help='Remove logs and artifacts so cloud-init can re-run.')
+        "clean", help="Remove logs and artifacts so cloud-init can re-run."
+    )
 
     parser_status = subparsers.add_parser(
-        'status', help='Report cloud-init status or wait on completion.')
+        "status", help="Report cloud-init status or wait on completion."
+    )
 
     if sysv_args:
         # Only load subparsers if subcommand is specified to avoid load cost
-        if sysv_args[0] == 'analyze':
+        if sysv_args[0] == "analyze":
             from cloudinit.analyze.__main__ import get_parser as analyze_parser
+
             # Construct analyze subcommand parser
             analyze_parser(parser_analyze)
-        elif sysv_args[0] == 'devel':
+        elif sysv_args[0] == "devel":
             from cloudinit.cmd.devel.parser import get_parser as devel_parser
+
             # Construct devel subcommand parser
             devel_parser(parser_devel)
-        elif sysv_args[0] == 'collect-logs':
+        elif sysv_args[0] == "collect-logs":
             from cloudinit.cmd.devel.logs import (
-                get_parser as logs_parser, handle_collect_logs_args)
+                get_parser as logs_parser,
+                handle_collect_logs_args,
+            )
+
             logs_parser(parser_collect_logs)
             parser_collect_logs.set_defaults(
-                action=('collect-logs', handle_collect_logs_args))
-        elif sysv_args[0] == 'clean':
+                action=("collect-logs", handle_collect_logs_args)
+            )
+        elif sysv_args[0] == "clean":
             from cloudinit.cmd.clean import (
-                get_parser as clean_parser, handle_clean_args)
+                get_parser as clean_parser,
+                handle_clean_args,
+            )
+
             clean_parser(parser_clean)
-            parser_clean.set_defaults(
-                action=('clean', handle_clean_args))
-        elif sysv_args[0] == 'query':
+            parser_clean.set_defaults(action=("clean", handle_clean_args))
+        elif sysv_args[0] == "query":
             from cloudinit.cmd.query import (
-                get_parser as query_parser, handle_args as handle_query_args)
+                get_parser as query_parser,
+                handle_args as handle_query_args,
+            )
+
             query_parser(parser_query)
-            parser_query.set_defaults(
-                action=('render', handle_query_args))
-        elif sysv_args[0] == 'status':
+            parser_query.set_defaults(action=("render", handle_query_args))
+        elif sysv_args[0] == "status":
             from cloudinit.cmd.status import (
-                get_parser as status_parser, handle_status_args)
+                get_parser as status_parser,
+                handle_status_args,
+            )
+
             status_parser(parser_status)
-            parser_status.set_defaults(
-                action=('status', handle_status_args))
+            parser_status.set_defaults(action=("status", handle_status_args))
 
     args = parser.parse_args(args=sysv_args)
 
@@ -906,14 +1032,20 @@ def main(sysv_args=None):
         if args.local:
             rname, rdesc = ("init-local", "searching for local datasources")
         else:
-            rname, rdesc = ("init-network",
-                            "searching for network datasources")
+            rname, rdesc = (
+                "init-network",
+                "searching for network datasources",
+            )
     elif name == "modules":
-        rname, rdesc = ("modules-%s" % args.mode,
-                        "running modules for %s" % args.mode)
+        rname, rdesc = (
+            "modules-%s" % args.mode,
+            "running modules for %s" % args.mode,
+        )
     elif name == "single":
-        rname, rdesc = ("single/%s" % args.name,
-                        "running single module %s" % args.name)
+        rname, rdesc = (
+            "single/%s" % args.name,
+            "running single module %s" % args.name,
+        )
         report_on = args.report
     else:
         rname = name
@@ -921,19 +1053,24 @@ def main(sysv_args=None):
         report_on = False
 
     args.reporter = events.ReportEventStack(
-        rname, rdesc, reporting_enabled=report_on)
+        rname, rdesc, reporting_enabled=report_on
+    )
 
     with args.reporter:
         retval = util.log_time(
-            logfunc=LOG.debug, msg="cloud-init mode '%s'" % name,
-            get_uptime=True, func=functor, args=(name, args))
+            logfunc=LOG.debug,
+            msg="cloud-init mode '%s'" % name,
+            get_uptime=True,
+            func=functor,
+            args=(name, args),
+        )
         reporting.flush_events()
         return retval
 
 
-if __name__ == '__main__':
-    if 'TZ' not in os.environ:
-        os.environ['TZ'] = ":/etc/localtime"
+if __name__ == "__main__":
+    if "TZ" not in os.environ:
+        os.environ["TZ"] = ":/etc/localtime"
     return_value = main(sys.argv)
     if return_value:
         sys.exit(return_value)
diff --git a/cloudinit/cmd/query.py b/cloudinit/cmd/query.py
index e53cd855..46f17699 100644
--- a/cloudinit/cmd/query.py
+++ b/cloudinit/cmd/query.py
@@ -14,22 +14,24 @@ output; if this fails, they are treated as binary.
 """
 
 import argparse
-from errno import EACCES
 import os
 import sys
+from errno import EACCES
 
+from cloudinit import log, util
+from cloudinit.cmd.devel import addLogHandlerCLI, read_cfg_paths
 from cloudinit.handlers.jinja_template import (
     convert_jinja_instance_data,
     get_jinja_variable_alias,
-    render_jinja_payload
+    render_jinja_payload,
 )
-from cloudinit.cmd.devel import addLogHandlerCLI, read_cfg_paths
-from cloudinit import log
 from cloudinit.sources import (
-    INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE, REDACT_SENSITIVE_VALUE)
-from cloudinit import util
+    INSTANCE_JSON_FILE,
+    INSTANCE_JSON_SENSITIVE_FILE,
+    REDACT_SENSITIVE_VALUE,
+)
 
-NAME = 'query'
+NAME = "query"
 LOG = log.getLogger(NAME)
 
 
@@ -43,41 +45,79 @@ def get_parser(parser=None):
     @returns: ArgumentParser with proper argument configuration.
     """
     if not parser:
-        parser = argparse.ArgumentParser(
-            prog=NAME, description=__doc__)
+        parser = argparse.ArgumentParser(prog=NAME, description=__doc__)
     parser.add_argument(
-        '-d', '--debug', action='store_true', default=False,
-        help='Add verbose messages during template render')
+        "-d",
+        "--debug",
+        action="store_true",
+        default=False,
+        help="Add verbose messages during template render",
+    )
     parser.add_argument(
-        '-i', '--instance-data', type=str,
-        help=('Path to instance-data.json file. Default is /run/cloud-init/%s'
-              % INSTANCE_JSON_FILE))
+        "-i",
+        "--instance-data",
+        type=str,
+        help="Path to instance-data.json file. Default is /run/cloud-init/%s"
+        % INSTANCE_JSON_FILE,
+    )
     parser.add_argument(
-        '-l', '--list-keys', action='store_true', default=False,
-        help=('List query keys available at the provided instance-data'
-              ' <varname>.'))
+        "-l",
+        "--list-keys",
+        action="store_true",
+        default=False,
+        help=(
+            "List query keys available at the provided instance-data"
+            " <varname>."
+        ),
+    )
     parser.add_argument(
-        '-u', '--user-data', type=str,
-        help=('Path to user-data file. Default is'
-              ' /var/lib/cloud/instance/user-data.txt'))
+        "-u",
+        "--user-data",
+        type=str,
+        help=(
+            "Path to user-data file. Default is"
+            " /var/lib/cloud/instance/user-data.txt"
+        ),
+    )
     parser.add_argument(
-        '-v', '--vendor-data', type=str,
-        help=('Path to vendor-data file. Default is'
-              ' /var/lib/cloud/instance/vendor-data.txt'))
+        "-v",
+        "--vendor-data",
+        type=str,
+        help=(
+            "Path to vendor-data file. Default is"
+            " /var/lib/cloud/instance/vendor-data.txt"
+        ),
+    )
     parser.add_argument(
-        'varname', type=str, nargs='?',
-        help=('A dot-delimited specific variable to query from'
-              ' instance-data. For example: v1.local_hostname. If the'
-              ' value is not JSON serializable, it will be base64-encoded and'
-              ' will contain the prefix "ci-b64:". '))
+        "varname",
+        type=str,
+        nargs="?",
+        help=(
+            "A dot-delimited specific variable to query from"
+            " instance-data. For example: v1.local_hostname. If the"
+            " value is not JSON serializable, it will be base64-encoded and"
+            ' will contain the prefix "ci-b64:". '
+        ),
+    )
     parser.add_argument(
-        '-a', '--all', action='store_true', default=False, dest='dump_all',
-        help='Dump all available instance-data')
+        "-a",
+        "--all",
+        action="store_true",
+        default=False,
+        dest="dump_all",
+        help="Dump all available instance-data",
+    )
     parser.add_argument(
-        '-f', '--format', type=str, dest='format',
-        help=('Optionally specify a custom output format string. Any'
-              ' instance-data variable can be specified between double-curly'
-              ' braces. For example -f "{{ v2.cloud_name }}"'))
+        "-f",
+        "--format",
+        type=str,
+        dest="format",
+        help=(
+            "Optionally specify a custom output format string. Any"
+            " instance-data variable can be specified between double-curly"
+            ' braces. For example -f "{{ v2.cloud_name }}"'
+        ),
+    )
     return parser
 
 
@@ -91,7 +131,7 @@ def load_userdata(ud_file_path):
     """
     bdata = util.load_file(ud_file_path, decode=False)
     try:
-        return bdata.decode('utf-8')
+        return bdata.decode("utf-8")
     except UnicodeDecodeError:
         return util.decomp_gzip(bdata, quiet=False, decode=True)
 
@@ -118,13 +158,15 @@ def _read_instance_data(instance_data, user_data, vendor_data) -> dict:
         redacted_data_fn = os.path.join(paths.run_dir, INSTANCE_JSON_FILE)
         if uid == 0:
             sensitive_data_fn = os.path.join(
-                paths.run_dir, INSTANCE_JSON_SENSITIVE_FILE)
+                paths.run_dir, INSTANCE_JSON_SENSITIVE_FILE
+            )
             if os.path.exists(sensitive_data_fn):
                 instance_data_fn = sensitive_data_fn
             else:
                 LOG.warning(
-                    'Missing root-readable %s. Using redacted %s instead.',
-                    sensitive_data_fn, redacted_data_fn
+                    "Missing root-readable %s. Using redacted %s instead.",
+                    sensitive_data_fn,
+                    redacted_data_fn,
                 )
                 instance_data_fn = redacted_data_fn
         else:
@@ -132,11 +174,11 @@ def _read_instance_data(instance_data, user_data, vendor_data) -> dict:
     if user_data:
         user_data_fn = user_data
     else:
-        user_data_fn = os.path.join(paths.instance_link, 'user-data.txt')
+        user_data_fn = os.path.join(paths.instance_link, "user-data.txt")
     if vendor_data:
         vendor_data_fn = vendor_data
     else:
-        vendor_data_fn = os.path.join(paths.instance_link, 'vendor-data.txt')
+        vendor_data_fn = os.path.join(paths.instance_link, "vendor-data.txt")
 
     try:
         instance_json = util.load_file(instance_data_fn)
@@ -144,24 +186,30 @@ def _read_instance_data(instance_data, user_data, vendor_data) -> dict:
         if e.errno == EACCES:
             LOG.error("No read permission on '%s'. Try sudo", instance_data_fn)
         else:
-            LOG.error('Missing instance-data file: %s', instance_data_fn)
+            LOG.error("Missing instance-data file: %s", instance_data_fn)
         raise
 
     instance_data = util.load_json(instance_json)
     if uid != 0:
-        instance_data['userdata'] = (
-            '<%s> file:%s' % (REDACT_SENSITIVE_VALUE, user_data_fn))
-        instance_data['vendordata'] = (
-            '<%s> file:%s' % (REDACT_SENSITIVE_VALUE, vendor_data_fn))
+        instance_data["userdata"] = "<%s> file:%s" % (
+            REDACT_SENSITIVE_VALUE,
+            user_data_fn,
+        )
+        instance_data["vendordata"] = "<%s> file:%s" % (
+            REDACT_SENSITIVE_VALUE,
+            vendor_data_fn,
+        )
     else:
-        instance_data['userdata'] = load_userdata(user_data_fn)
-        instance_data['vendordata'] = load_userdata(vendor_data_fn)
+        instance_data["userdata"] = load_userdata(user_data_fn)
+        instance_data["vendordata"] = load_userdata(vendor_data_fn)
     return instance_data
 
 
 def _find_instance_data_leaf_by_varname_path(
-    jinja_vars_without_aliases: dict, jinja_vars_with_aliases: dict,
-    varname: str, list_keys: bool
+    jinja_vars_without_aliases: dict,
+    jinja_vars_with_aliases: dict,
+    varname: str,
+    list_keys: bool,
 ):
     """Return the value of the dot-delimited varname path in instance-data
 
@@ -174,7 +222,7 @@ def _find_instance_data_leaf_by_varname_path(
     """
     walked_key_path = ""
     response = jinja_vars_without_aliases
-    for key_path_part in varname.split('.'):
+    for key_path_part in varname.split("."):
         try:
             # Walk key path using complete aliases dict, yet response
             # should only contain jinja_without_aliases
@@ -205,8 +253,9 @@ def handle_args(name, args):
     addLogHandlerCLI(LOG, log.DEBUG if args.debug else log.WARNING)
     if not any([args.list_keys, args.varname, args.format, args.dump_all]):
         LOG.error(
-            'Expected one of the options: --all, --format,'
-            ' --list-keys or varname')
+            "Expected one of the options: --all, --format,"
+            " --list-keys or varname"
+        )
         get_parser().print_help()
         return 1
     try:
@@ -216,11 +265,13 @@ def handle_args(name, args):
     except (IOError, OSError):
         return 1
     if args.format:
-        payload = '## template: jinja\n{fmt}'.format(fmt=args.format)
+        payload = "## template: jinja\n{fmt}".format(fmt=args.format)
         rendered_payload = render_jinja_payload(
-            payload=payload, payload_fn='query commandline',
+            payload=payload,
+            payload_fn="query commandline",
             instance_data=instance_data,
-            debug=True if args.debug else False)
+            debug=True if args.debug else False,
+        )
         if rendered_payload:
             print(rendered_payload)
             return 0
@@ -240,7 +291,7 @@ def handle_args(name, args):
                 jinja_vars_without_aliases=response,
                 jinja_vars_with_aliases=jinja_vars_with_aliases,
                 varname=args.varname,
-                list_keys=args.list_keys
+                list_keys=args.list_keys,
             )
         except (KeyError, ValueError) as e:
             LOG.error(e)
@@ -248,11 +299,10 @@ def handle_args(name, args):
     if args.list_keys:
         if not isinstance(response, dict):
             LOG.error(
-                "--list-keys provided but '%s' is not a dict",
-                args.varname
+                "--list-keys provided but '%s' is not a dict", args.varname
             )
             return 1
-        response = '\n'.join(sorted(response.keys()))
+        response = "\n".join(sorted(response.keys()))
     if not isinstance(response, str):
         response = util.json_dumps(response)
     print(response)
@@ -265,7 +315,7 @@ def main():
     sys.exit(handle_args(NAME, parser.parse_args()))
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/cmd/status.py b/cloudinit/cmd/status.py
index ea79a85b..cff16c34 100644
--- a/cloudinit/cmd/status.py
+++ b/cloudinit/cmd/status.py
@@ -7,20 +7,20 @@
 import argparse
 import os
 import sys
-from time import gmtime, strftime, sleep
+from time import gmtime, sleep, strftime
 
 from cloudinit.distros import uses_systemd
 from cloudinit.stages import Init
 from cloudinit.util import get_cmdline, load_file, load_json
 
-CLOUDINIT_DISABLED_FILE = '/etc/cloud/cloud-init.disabled'
+CLOUDINIT_DISABLED_FILE = "/etc/cloud/cloud-init.disabled"
 
 # customer visible status messages
-STATUS_ENABLED_NOT_RUN = 'not run'
-STATUS_RUNNING = 'running'
-STATUS_DONE = 'done'
-STATUS_ERROR = 'error'
-STATUS_DISABLED = 'disabled'
+STATUS_ENABLED_NOT_RUN = "not run"
+STATUS_RUNNING = "running"
+STATUS_DONE = "done"
+STATUS_ERROR = "error"
+STATUS_DISABLED = "disabled"
 
 
 def get_parser(parser=None):
@@ -34,15 +34,25 @@ def get_parser(parser=None):
     """
     if not parser:
         parser = argparse.ArgumentParser(
-            prog='status',
-            description='Report run status of cloud init')
+            prog="status", description="Report run status of cloud init"
+        )
     parser.add_argument(
-        '-l', '--long', action='store_true', default=False,
-        help=('Report long format of statuses including run stage name and'
-              ' error messages'))
+        "-l",
+        "--long",
+        action="store_true",
+        default=False,
+        help=(
+            "Report long format of statuses including run stage name and"
+            " error messages"
+        ),
+    )
     parser.add_argument(
-        '-w', '--wait', action='store_true', default=False,
-        help='Block waiting on cloud-init to complete')
+        "-w",
+        "--wait",
+        action="store_true",
+        default=False,
+        help="Block waiting on cloud-init to complete",
+    )
     return parser
 
 
@@ -55,18 +65,18 @@ def handle_status_args(name, args):
     status, status_detail, time = _get_status_details(init.paths)
     if args.wait:
         while status in (STATUS_ENABLED_NOT_RUN, STATUS_RUNNING):
-            sys.stdout.write('.')
+            sys.stdout.write(".")
             sys.stdout.flush()
             status, status_detail, time = _get_status_details(init.paths)
             sleep(0.25)
-        sys.stdout.write('\n')
+        sys.stdout.write("\n")
     if args.long:
-        print('status: {0}'.format(status))
+        print("status: {0}".format(status))
         if time:
-            print('time: {0}'.format(time))
-        print('detail:\n{0}'.format(status_detail))
+            print("time: {0}".format(time))
+        print("detail:\n{0}".format(status_detail))
     else:
-        print('status: {0}'.format(status))
+        print("status: {0}".format(status))
     return 1 if status == STATUS_ERROR else 0
 
 
@@ -81,20 +91,20 @@ def _is_cloudinit_disabled(disable_file, paths):
     is_disabled = False
     cmdline_parts = get_cmdline().split()
     if not uses_systemd():
-        reason = 'Cloud-init enabled on sysvinit'
-    elif 'cloud-init=enabled' in cmdline_parts:
-        reason = 'Cloud-init enabled by kernel command line cloud-init=enabled'
+        reason = "Cloud-init enabled on sysvinit"
+    elif "cloud-init=enabled" in cmdline_parts:
+        reason = "Cloud-init enabled by kernel command line cloud-init=enabled"
     elif os.path.exists(disable_file):
         is_disabled = True
-        reason = 'Cloud-init disabled by {0}'.format(disable_file)
-    elif 'cloud-init=disabled' in cmdline_parts:
+        reason = "Cloud-init disabled by {0}".format(disable_file)
+    elif "cloud-init=disabled" in cmdline_parts:
         is_disabled = True
-        reason = 'Cloud-init disabled by kernel parameter cloud-init=disabled'
-    elif not os.path.exists(os.path.join(paths.run_dir, 'enabled')):
+        reason = "Cloud-init disabled by kernel parameter cloud-init=disabled"
+    elif not os.path.exists(os.path.join(paths.run_dir, "enabled")):
         is_disabled = True
-        reason = 'Cloud-init disabled by cloud-init-generator'
+        reason = "Cloud-init disabled by cloud-init-generator"
     else:
-        reason = 'Cloud-init enabled by systemd cloud-init-generator'
+        reason = "Cloud-init enabled by systemd cloud-init-generator"
     return (is_disabled, reason)
 
 
@@ -106,34 +116,35 @@ def _get_status_details(paths):
     Values are obtained from parsing paths.run_dir/status.json.
     """
     status = STATUS_ENABLED_NOT_RUN
-    status_detail = ''
+    status_detail = ""
     status_v1 = {}
 
-    status_file = os.path.join(paths.run_dir, 'status.json')
-    result_file = os.path.join(paths.run_dir, 'result.json')
+    status_file = os.path.join(paths.run_dir, "status.json")
+    result_file = os.path.join(paths.run_dir, "result.json")
 
     (is_disabled, reason) = _is_cloudinit_disabled(
-        CLOUDINIT_DISABLED_FILE, paths)
+        CLOUDINIT_DISABLED_FILE, paths
+    )
     if is_disabled:
         status = STATUS_DISABLED
         status_detail = reason
     if os.path.exists(status_file):
         if not os.path.exists(result_file):
             status = STATUS_RUNNING
-        status_v1 = load_json(load_file(status_file)).get('v1', {})
+        status_v1 = load_json(load_file(status_file)).get("v1", {})
     errors = []
     latest_event = 0
     for key, value in sorted(status_v1.items()):
-        if key == 'stage':
+        if key == "stage":
             if value:
                 status = STATUS_RUNNING
-                status_detail = 'Running in stage: {0}'.format(value)
-        elif key == 'datasource':
+                status_detail = "Running in stage: {0}".format(value)
+        elif key == "datasource":
             status_detail = value
         elif isinstance(value, dict):
-            errors.extend(value.get('errors', []))
-            start = value.get('start') or 0
-            finished = value.get('finished') or 0
+            errors.extend(value.get("errors", []))
+            start = value.get("start") or 0
+            finished = value.get("finished") or 0
             if finished == 0 and start != 0:
                 status = STATUS_RUNNING
             event_time = max(start, finished)
@@ -141,23 +152,23 @@ def _get_status_details(paths):
                 latest_event = event_time
     if errors:
         status = STATUS_ERROR
-        status_detail = '\n'.join(errors)
+        status_detail = "\n".join(errors)
     elif status == STATUS_ENABLED_NOT_RUN and latest_event > 0:
         status = STATUS_DONE
     if latest_event:
-        time = strftime('%a, %d %b %Y %H:%M:%S %z', gmtime(latest_event))
+        time = strftime("%a, %d %b %Y %H:%M:%S %z", gmtime(latest_event))
     else:
-        time = ''
+        time = ""
     return status, status_detail, time
 
 
 def main():
     """Tool to report status of cloud-init."""
     parser = get_parser()
-    sys.exit(handle_status_args('status', parser.parse_args()))
+    sys.exit(handle_status_args("status", parser.parse_args()))
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     main()
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/__init__.py b/cloudinit/config/__init__.py
index 0ef9a748..ed124180 100644
--- a/cloudinit/config/__init__.py
+++ b/cloudinit/config/__init__.py
@@ -6,9 +6,8 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.settings import (PER_INSTANCE, FREQUENCIES)
-
 from cloudinit import log as logging
+from cloudinit.settings import FREQUENCIES, PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
@@ -22,26 +21,27 @@ MOD_PREFIX = "cc_"
 def form_module_name(name):
     canon_name = name.replace("-", "_")
     if canon_name.lower().endswith(".py"):
-        canon_name = canon_name[0:(len(canon_name) - 3)]
+        canon_name = canon_name[0 : (len(canon_name) - 3)]
     canon_name = canon_name.strip()
     if not canon_name:
         return None
     if not canon_name.startswith(MOD_PREFIX):
-        canon_name = '%s%s' % (MOD_PREFIX, canon_name)
+        canon_name = "%s%s" % (MOD_PREFIX, canon_name)
     return canon_name
 
 
 def fixup_module(mod, def_freq=PER_INSTANCE):
-    if not hasattr(mod, 'frequency'):
-        setattr(mod, 'frequency', def_freq)
+    if not hasattr(mod, "frequency"):
+        setattr(mod, "frequency", def_freq)
     else:
         freq = mod.frequency
         if freq and freq not in FREQUENCIES:
             LOG.warning("Module %s has an unknown frequency %s", mod, freq)
-    if not hasattr(mod, 'distros'):
-        setattr(mod, 'distros', [])
-    if not hasattr(mod, 'osfamilies'):
-        setattr(mod, 'osfamilies', [])
+    if not hasattr(mod, "distros"):
+        setattr(mod, "distros", [])
+    if not hasattr(mod, "osfamilies"):
+        setattr(mod, "osfamilies", [])
     return mod
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_apk_configure.py b/cloudinit/config/cc_apk_configure.py
index d227a58d..a615c814 100644
--- a/cloudinit/config/cc_apk_configure.py
+++ b/cloudinit/config/cc_apk_configure.py
@@ -9,9 +9,7 @@
 from textwrap import dedent
 
 from cloudinit import log as logging
-from cloudinit import temp_utils
-from cloudinit import templater
-from cloudinit import util
+from cloudinit import temp_utils, templater, util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 
@@ -54,34 +52,41 @@ REPOSITORIES_TEMPLATE = """\
 
 
 frequency = PER_INSTANCE
-distros = ['alpine']
+distros = ["alpine"]
 meta = {
-    'id': 'cc_apk_configure',
-    'name': 'APK Configure',
-    'title': 'Configure apk repositories file',
-    'description': dedent("""\
+    "id": "cc_apk_configure",
+    "name": "APK Configure",
+    "title": "Configure apk repositories file",
+    "description": dedent(
+        """\
         This module handles configuration of the /etc/apk/repositories file.
 
         .. note::
           To ensure that apk configuration is valid yaml, any strings
           containing special characters, especially ``:`` should be quoted.
-    """),
-    'distros': distros,
-    'examples': [
-        dedent("""\
+    """
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         # Keep the existing /etc/apk/repositories file unaltered.
         apk_repos:
             preserve_repositories: true
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
         # Create repositories file for Alpine v3.12 main and community
         # using default mirror site.
         apk_repos:
             alpine_repo:
                 community_enabled: true
                 version: 'v3.12'
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
         # Create repositories file for Alpine Edge main, community, and
         # testing using a specified mirror site and also a local repo.
         apk_repos:
@@ -91,21 +96,23 @@ meta = {
                 testing_enabled: true
                 version: 'edge'
             local_repo_base_url: 'https://my-local-server/local-alpine'
-        """),
+        """
+        ),
     ],
-    'frequency': frequency,
+    "frequency": frequency,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'apk_repos': {
-            'type': 'object',
-            'properties': {
-                'preserve_repositories': {
-                    'type': 'boolean',
-                    'default': False,
-                    'description': dedent("""\
+    "type": "object",
+    "properties": {
+        "apk_repos": {
+            "type": "object",
+            "properties": {
+                "preserve_repositories": {
+                    "type": "boolean",
+                    "default": False,
+                    "description": dedent(
+                        """\
                         By default, cloud-init will generate a new repositories
                         file ``/etc/apk/repositories`` based on any valid
                         configuration settings specified within a apk_repos
@@ -116,33 +123,41 @@ schema = {
                         The ``preserve_repositories`` option overrides
                         all other config keys that would alter
                         ``/etc/apk/repositories``.
-                    """)
+                    """
+                    ),
                 },
-                'alpine_repo': {
-                    'type': ['object', 'null'],
-                    'properties': {
-                        'base_url': {
-                            'type': 'string',
-                            'default': DEFAULT_MIRROR,
-                            'description': dedent("""\
+                "alpine_repo": {
+                    "type": ["object", "null"],
+                    "properties": {
+                        "base_url": {
+                            "type": "string",
+                            "default": DEFAULT_MIRROR,
+                            "description": dedent(
+                                """\
                                 The base URL of an Alpine repository, or
                                 mirror, to download official packages from.
                                 If not specified then it defaults to ``{}``
-                            """.format(DEFAULT_MIRROR))
+                            """.format(
+                                    DEFAULT_MIRROR
+                                )
+                            ),
                         },
-                        'community_enabled': {
-                            'type': 'boolean',
-                            'default': False,
-                            'description': dedent("""\
+                        "community_enabled": {
+                            "type": "boolean",
+                            "default": False,
+                            "description": dedent(
+                                """\
                                 Whether to add the Community repo to the
                                 repositories file. By default the Community
                                 repo is not included.
-                            """)
+                            """
+                            ),
                         },
-                        'testing_enabled': {
-                            'type': 'boolean',
-                            'default': False,
-                            'description': dedent("""\
+                        "testing_enabled": {
+                            "type": "boolean",
+                            "default": False,
+                            "description": dedent(
+                                """\
                                 Whether to add the Testing repo to the
                                 repositories file. By default the Testing
                                 repo is not included. It is only recommended
@@ -151,32 +166,37 @@ schema = {
                                 installed from Testing may have dependancies
                                 that conflict with those in non-Edge Main or
                                 Community repos."
-                            """)
+                            """
+                            ),
                         },
-                        'version': {
-                            'type': 'string',
-                            'description': dedent("""\
+                        "version": {
+                            "type": "string",
+                            "description": dedent(
+                                """\
                                 The Alpine version to use (e.g. ``v3.12`` or
                                 ``edge``)
-                            """)
+                            """
+                            ),
                         },
                     },
-                    'required': ['version'],
-                    'minProperties': 1,
-                    'additionalProperties': False,
+                    "required": ["version"],
+                    "minProperties": 1,
+                    "additionalProperties": False,
                 },
-                'local_repo_base_url': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "local_repo_base_url": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         The base URL of an Alpine repository containing
                         unofficial packages
-                    """)
-                }
+                    """
+                    ),
+                },
             },
-            'minProperties': 1,  # Either preserve_repositories or alpine_repo
-            'additionalProperties': False,
+            "minProperties": 1,  # Either preserve_repositories or alpine_repo
+            "additionalProperties": False,
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)
@@ -195,38 +215,44 @@ def handle(name, cfg, cloud, log, _args):
 
     # If there is no "apk_repos" section in the configuration
     # then do nothing.
-    apk_section = cfg.get('apk_repos')
+    apk_section = cfg.get("apk_repos")
     if not apk_section:
-        LOG.debug(("Skipping module named %s,"
-                   " no 'apk_repos' section found"), name)
+        LOG.debug(
+            "Skipping module named %s, no 'apk_repos' section found", name
+        )
         return
 
     validate_cloudconfig_schema(cfg, schema)
 
     # If "preserve_repositories" is explicitly set to True in
     # the configuration do nothing.
-    if util.get_cfg_option_bool(apk_section, 'preserve_repositories', False):
-        LOG.debug(("Skipping module named %s,"
-                   " 'preserve_repositories' is set"), name)
+    if util.get_cfg_option_bool(apk_section, "preserve_repositories", False):
+        LOG.debug(
+            "Skipping module named %s, 'preserve_repositories' is set", name
+        )
         return
 
     # If there is no "alpine_repo" subsection of "apk_repos" present in the
     # configuration then do nothing, as at least "version" is required to
     # create valid repositories entries.
-    alpine_repo = apk_section.get('alpine_repo')
+    alpine_repo = apk_section.get("alpine_repo")
     if not alpine_repo:
-        LOG.debug(("Skipping module named %s,"
-                   " no 'alpine_repo' configuration found"), name)
+        LOG.debug(
+            "Skipping module named %s, no 'alpine_repo' configuration found",
+            name,
+        )
         return
 
     # If there is no "version" value present in configuration then do nothing.
-    alpine_version = alpine_repo.get('version')
+    alpine_version = alpine_repo.get("version")
     if not alpine_version:
-        LOG.debug(("Skipping module named %s,"
-                   " 'version' not specified in alpine_repo"), name)
+        LOG.debug(
+            "Skipping module named %s, 'version' not specified in alpine_repo",
+            name,
+        )
         return
 
-    local_repo = apk_section.get('local_repo_base_url', '')
+    local_repo = apk_section.get("local_repo_base_url", "")
 
     _write_repositories_file(alpine_repo, alpine_version, local_repo)
 
@@ -240,22 +266,23 @@ def _write_repositories_file(alpine_repo, alpine_version, local_repo):
     @param local_repo: A string containing the base URL of a local repo.
     """
 
-    repo_file = '/etc/apk/repositories'
+    repo_file = "/etc/apk/repositories"
 
-    alpine_baseurl = alpine_repo.get('base_url', DEFAULT_MIRROR)
+    alpine_baseurl = alpine_repo.get("base_url", DEFAULT_MIRROR)
 
-    params = {'alpine_baseurl': alpine_baseurl,
-              'alpine_version': alpine_version,
-              'community_enabled': alpine_repo.get('community_enabled'),
-              'testing_enabled': alpine_repo.get('testing_enabled'),
-              'local_repo': local_repo}
+    params = {
+        "alpine_baseurl": alpine_baseurl,
+        "alpine_version": alpine_version,
+        "community_enabled": alpine_repo.get("community_enabled"),
+        "testing_enabled": alpine_repo.get("testing_enabled"),
+        "local_repo": local_repo,
+    }
 
-    tfile = temp_utils.mkstemp(prefix='template_name-', suffix=".tmpl")
+    tfile = temp_utils.mkstemp(prefix="template_name-", suffix=".tmpl")
     template_fn = tfile[1]  # Filepath is second item in tuple
     util.write_file(template_fn, content=REPOSITORIES_TEMPLATE)
 
-    LOG.debug('Generating Alpine repository configuration file: %s',
-              repo_file)
+    LOG.debug("Generating Alpine repository configuration file: %s", repo_file)
     templater.render_to_file(template_fn, repo_file, params)
     # Clean up temporary template
     util.del_file(template_fn)
diff --git a/cloudinit/config/cc_apt_configure.py b/cloudinit/config/cc_apt_configure.py
index 2e844c2c..b0728517 100644
--- a/cloudinit/config/cc_apt_configure.py
+++ b/cloudinit/config/cc_apt_configure.py
@@ -10,16 +10,14 @@
 
 import glob
 import os
-import re
 import pathlib
+import re
 from textwrap import dedent
 
-from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import gpg
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import templater
-from cloudinit import util
+from cloudinit import subp, templater, util
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
@@ -27,59 +25,46 @@ LOG = logging.getLogger(__name__)
 # this will match 'XXX:YYY' (ie, 'cloud-archive:foo' or 'ppa:bar')
 ADD_APT_REPO_MATCH = r"^[\w-]+:\w"
 
-APT_LOCAL_KEYS = '/etc/apt/trusted.gpg'
-APT_TRUSTED_GPG_DIR = '/etc/apt/trusted.gpg.d/'
-CLOUD_INIT_GPG_DIR = '/etc/apt/cloud-init.gpg.d/'
+APT_LOCAL_KEYS = "/etc/apt/trusted.gpg"
+APT_TRUSTED_GPG_DIR = "/etc/apt/trusted.gpg.d/"
+CLOUD_INIT_GPG_DIR = "/etc/apt/cloud-init.gpg.d/"
 
 frequency = PER_INSTANCE
 distros = ["ubuntu", "debian"]
 mirror_property = {
-    'type': 'array',
-    'items': {
-        'type': 'object',
-        'additionalProperties': False,
-        'required': ['arches'],
-        'properties': {
-            'arches': {
-                'type': 'array',
-                'items': {
-                    'type': 'string'
-                },
-                'minItems': 1
-            },
-            'uri': {
-                'type': 'string',
-                'format': 'uri'
-            },
-            'search': {
-                'type': 'array',
-                'items': {
-                    'type': 'string',
-                    'format': 'uri'
-                },
-                'minItems': 1
-            },
-            'search_dns': {
-                'type': 'boolean',
+    "type": "array",
+    "items": {
+        "type": "object",
+        "additionalProperties": False,
+        "required": ["arches"],
+        "properties": {
+            "arches": {
+                "type": "array",
+                "items": {"type": "string"},
+                "minItems": 1,
             },
-            'keyid': {
-                'type': 'string'
+            "uri": {"type": "string", "format": "uri"},
+            "search": {
+                "type": "array",
+                "items": {"type": "string", "format": "uri"},
+                "minItems": 1,
             },
-            'key': {
-                'type': 'string'
+            "search_dns": {
+                "type": "boolean",
             },
-            'keyserver': {
-                'type': 'string'
-            }
-        }
-    }
+            "keyid": {"type": "string"},
+            "key": {"type": "string"},
+            "keyserver": {"type": "string"},
+        },
+    },
 }
 
 meta = {
-    'id': 'cc_apt_configure',
-    'name': 'Apt Configure',
-    'title': 'Configure apt for the user',
-    'description': dedent("""\
+    "id": "cc_apt_configure",
+    "name": "Apt Configure",
+    "title": "Configure apt for the user",
+    "description": dedent(
+        """\
         This module handles both configuration of apt options and adding
         source lists.  There are configuration options such as
         ``apt_get_wrapper`` and ``apt_get_command`` that control how
@@ -94,9 +79,12 @@ meta = {
 
         .. note::
             For more information about apt configuration, see the
-            ``Additional apt configuration`` example."""),
-    'distros': distros,
-    'examples': [dedent("""\
+            ``Additional apt configuration`` example."""
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         apt:
           preserve_sources_list: false
           disable_suites:
@@ -153,21 +141,24 @@ meta = {
                   key: |
                       ------BEGIN PGP PUBLIC KEY BLOCK-------
                       <key data>
-                      ------END PGP PUBLIC KEY BLOCK-------""")],
-    'frequency': frequency,
+                      ------END PGP PUBLIC KEY BLOCK-------"""
+        )
+    ],
+    "frequency": frequency,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'apt': {
-            'type': 'object',
-            'additionalProperties': False,
-            'properties': {
-                'preserve_sources_list': {
-                    'type': 'boolean',
-                    'default': False,
-                    'description': dedent("""\
+    "type": "object",
+    "properties": {
+        "apt": {
+            "type": "object",
+            "additionalProperties": False,
+            "properties": {
+                "preserve_sources_list": {
+                    "type": "boolean",
+                    "default": False,
+                    "description": dedent(
+                        """\
                         By default, cloud-init will generate a new sources
                         list in ``/etc/apt/sources.list.d`` based on any
                         changes specified in cloud config. To disable this
@@ -179,15 +170,15 @@ schema = {
                         all other config keys that would alter
                         ``sources.list`` or ``sources.list.d``,
                         **except** for additional sources to be added
-                        to ``sources.list.d``.""")
+                        to ``sources.list.d``."""
+                    ),
                 },
-                'disable_suites': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'string'
-                    },
-                    'uniqueItems': True,
-                    'description': dedent("""\
+                "disable_suites": {
+                    "type": "array",
+                    "items": {"type": "string"},
+                    "uniqueItems": True,
+                    "description": dedent(
+                        """\
                         Entries in the sources list can be disabled using
                         ``disable_suites``, which takes a list of suites
                         to be disabled. If the string ``$RELEASE`` is
@@ -206,11 +197,13 @@ schema = {
 
                         When a suite is disabled using ``disable_suites``,
                         its entry in ``sources.list`` is not deleted; it
-                        is just commented out.""")
+                        is just commented out."""
+                    ),
                 },
-                'primary': {
+                "primary": {
                     **mirror_property,
-                    'description': dedent("""\
+                    "description": dedent(
+                        """\
                         The primary and security archive mirrors can
                         be specified using the ``primary`` and
                         ``security`` keys, respectively. Both the
@@ -264,27 +257,35 @@ schema = {
                             ``http://archive.ubuntu.com/ubuntu``.
                             - ``security`` => \
                             ``http://security.ubuntu.com/ubuntu``
-                        """)
+                        """
+                    ),
                 },
-                'security': {
+                "security": {
                     **mirror_property,
-                    'description': dedent("""\
-                        Please refer to the primary config documentation""")
+                    "description": dedent(
+                        """\
+                        Please refer to the primary config documentation"""
+                    ),
                 },
-                'add_apt_repo_match': {
-                    'type': 'string',
-                    'default': ADD_APT_REPO_MATCH,
-                    'description': dedent("""\
+                "add_apt_repo_match": {
+                    "type": "string",
+                    "default": ADD_APT_REPO_MATCH,
+                    "description": dedent(
+                        """\
                         All source entries in ``apt-sources`` that match
                         regex in ``add_apt_repo_match`` will be added to
                         the system using ``add-apt-repository``. If
                         ``add_apt_repo_match`` is not specified, it
-                        defaults to ``{}``""".format(ADD_APT_REPO_MATCH))
+                        defaults to ``{}``""".format(
+                            ADD_APT_REPO_MATCH
+                        )
+                    ),
                 },
-                'debconf_selections': {
-                    'type': 'object',
-                    'items': {'type': 'string'},
-                    'description': dedent("""\
+                "debconf_selections": {
+                    "type": "object",
+                    "items": {"type": "string"},
+                    "description": dedent(
+                        """\
                         Debconf additional configurations can be specified as a
                         dictionary under the ``debconf_selections`` config
                         key, with each key in the dict representing a
@@ -308,11 +309,13 @@ schema = {
 
                         For example: \
                         ``ippackage ippackage/ip string 127.0.01``
-                    """)
+                    """
+                    ),
                 },
-                'sources_list': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "sources_list": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                        Specifies a custom template for rendering
                        ``sources.list`` . If no ``sources_list`` template
                        is given, cloud-init will use sane default. Within
@@ -323,45 +326,55 @@ schema = {
                             - ``$RELEASE``
                             - ``$PRIMARY``
                             - ``$SECURITY``
-                            - ``$KEY_FILE``""")
+                            - ``$KEY_FILE``"""
+                    ),
                 },
-                'conf': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "conf": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         Specify configuration for apt, such as proxy
                         configuration. This configuration is specified as a
                         string. For multiline apt configuration, make sure
-                        to follow yaml syntax.""")
+                        to follow yaml syntax."""
+                    ),
                 },
-                'https_proxy': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "https_proxy": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         More convenient way to specify https apt proxy.
                         https proxy url is specified in the format
-                        ``https://[[user][:pass]@]host[:port]/``.""")
+                        ``https://[[user][:pass]@]host[:port]/``."""
+                    ),
                 },
-                'http_proxy': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "http_proxy": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         More convenient way to specify http apt proxy.
                         http proxy url is specified in the format
-                        ``http://[[user][:pass]@]host[:port]/``.""")
+                        ``http://[[user][:pass]@]host[:port]/``."""
+                    ),
                 },
-                'proxy': {
-                    'type': 'string',
-                    'description': 'Alias for defining a http apt proxy.'
+                "proxy": {
+                    "type": "string",
+                    "description": "Alias for defining a http apt proxy.",
                 },
-                'ftp_proxy': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "ftp_proxy": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         More convenient way to specify ftp apt proxy.
                         ftp proxy url is specified in the format
-                        ``ftp://[[user][:pass]@]host[:port]/``.""")
+                        ``ftp://[[user][:pass]@]host[:port]/``."""
+                    ),
                 },
-                'sources': {
-                    'type': 'object',
-                    'items': {'type': 'string'},
-                    'description': dedent("""\
+                "sources": {
+                    "type": "object",
+                    "items": {"type": "string"},
+                    "description": dedent(
+                        """\
                         Source list entries can be specified as a
                         dictionary under the ``sources`` config key, with
                         each key in the dict representing a different source
@@ -394,11 +407,12 @@ schema = {
                             - ``$PRIMARY``
                             - ``$SECURITY``
                             - ``$RELEASE``
-                            - ``$KEY_FILE``""")
-                }
-            }
+                            - ``$KEY_FILE``"""
+                    ),
+                },
+            },
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)
@@ -415,18 +429,22 @@ APT_PROXY_FN = "/etc/apt/apt.conf.d/90cloud-init-aptproxy"
 DEFAULT_KEYSERVER = "keyserver.ubuntu.com"
 
 # Default archive mirrors
-PRIMARY_ARCH_MIRRORS = {"PRIMARY": "http://archive.ubuntu.com/ubuntu/",
-                        "SECURITY": "http://security.ubuntu.com/ubuntu/"}
-PORTS_MIRRORS = {"PRIMARY": "http://ports.ubuntu.com/ubuntu-ports",
-                 "SECURITY": "http://ports.ubuntu.com/ubuntu-ports"}
-PRIMARY_ARCHES = ['amd64', 'i386']
-PORTS_ARCHES = ['s390x', 'arm64', 'armhf', 'powerpc', 'ppc64el', 'riscv64']
+PRIMARY_ARCH_MIRRORS = {
+    "PRIMARY": "http://archive.ubuntu.com/ubuntu/",
+    "SECURITY": "http://security.ubuntu.com/ubuntu/",
+}
+PORTS_MIRRORS = {
+    "PRIMARY": "http://ports.ubuntu.com/ubuntu-ports",
+    "SECURITY": "http://ports.ubuntu.com/ubuntu-ports",
+}
+PRIMARY_ARCHES = ["amd64", "i386"]
+PORTS_ARCHES = ["s390x", "arm64", "armhf", "powerpc", "ppc64el", "riscv64"]
 
 
 def get_default_mirrors(arch=None, target=None):
     """returns the default mirrors for the target. These depend on the
-       architecture, for more see:
-       https://wiki.ubuntu.com/UbuntuDevelopment/PackageArchive#Ports"""
+    architecture, for more see:
+    https://wiki.ubuntu.com/UbuntuDevelopment/PackageArchive#Ports"""
     if arch is None:
         arch = util.get_dpkg_architecture(target)
     if arch in PRIMARY_ARCHES:
@@ -438,8 +456,8 @@ def get_default_mirrors(arch=None, target=None):
 
 def handle(name, ocfg, cloud, log, _):
     """process the config for apt_config. This can be called from
-       curthooks if a global apt config was provided or via the "apt"
-       standalone command."""
+    curthooks if a global apt config was provided or via the "apt"
+    standalone command."""
     # keeping code close to curtin codebase via entry handler
     target = None
     if log is not None:
@@ -447,12 +465,14 @@ def handle(name, ocfg, cloud, log, _):
         LOG = log
     # feed back converted config, but only work on the subset under 'apt'
     ocfg = convert_to_v3_apt_format(ocfg)
-    cfg = ocfg.get('apt', {})
+    cfg = ocfg.get("apt", {})
 
     if not isinstance(cfg, dict):
         raise ValueError(
             "Expected dictionary for 'apt' config, found {config_type}".format(
-                config_type=type(cfg)))
+                config_type=type(cfg)
+            )
+        )
 
     validate_cloudconfig_schema(cfg, schema)
     apply_debconf_selections(cfg, target)
@@ -463,7 +483,7 @@ def _should_configure_on_empty_apt():
     # if no config was provided, should apt configuration be done?
     if util.system_is_snappy():
         return False, "system is snappy."
-    if not (subp.which('apt-get') or subp.which('apt')):
+    if not (subp.which("apt-get") or subp.which("apt")):
         return False, "no apt commands."
     return True, "Apt is available."
 
@@ -478,12 +498,12 @@ def apply_apt(cfg, cloud, target):
 
     LOG.debug("handling apt config: %s", cfg)
 
-    release = util.lsb_release(target=target)['codename']
+    release = util.lsb_release(target=target)["codename"]
     arch = util.get_dpkg_architecture(target)
     mirrors = find_apt_mirror_info(cfg, cloud, arch=arch)
     LOG.debug("Apt Mirror info: %s", mirrors)
 
-    if util.is_false(cfg.get('preserve_sources_list', False)):
+    if util.is_false(cfg.get("preserve_sources_list", False)):
         add_mirror_keys(cfg, target)
         generate_sources_list(cfg, release, mirrors, cloud)
         rename_apt_lists(mirrors, target, arch)
@@ -494,25 +514,34 @@ def apply_apt(cfg, cloud, target):
         LOG.exception("Failed to apply proxy or apt config info:")
 
     # Process 'apt_source -> sources {dict}'
-    if 'sources' in cfg:
+    if "sources" in cfg:
         params = mirrors
-        params['RELEASE'] = release
-        params['MIRROR'] = mirrors["MIRROR"]
+        params["RELEASE"] = release
+        params["MIRROR"] = mirrors["MIRROR"]
 
         matcher = None
-        matchcfg = cfg.get('add_apt_repo_match', ADD_APT_REPO_MATCH)
+        matchcfg = cfg.get("add_apt_repo_match", ADD_APT_REPO_MATCH)
         if matchcfg:
             matcher = re.compile(matchcfg).search
 
-        add_apt_sources(cfg['sources'], cloud, target=target,
-                        template_params=params, aa_repo_match=matcher)
+        add_apt_sources(
+            cfg["sources"],
+            cloud,
+            target=target,
+            template_params=params,
+            aa_repo_match=matcher,
+        )
 
 
 def debconf_set_selections(selections, target=None):
-    if not selections.endswith(b'\n'):
-        selections += b'\n'
-    subp.subp(['debconf-set-selections'], data=selections, target=target,
-              capture=True)
+    if not selections.endswith(b"\n"):
+        selections += b"\n"
+    subp.subp(
+        ["debconf-set-selections"],
+        data=selections,
+        target=target,
+        capture=True,
+    )
 
 
 def dpkg_reconfigure(packages, target=None):
@@ -532,12 +561,20 @@ def dpkg_reconfigure(packages, target=None):
             unhandled.append(pkg)
 
     if len(unhandled):
-        LOG.warning("The following packages were installed and preseeded, "
-                    "but cannot be unconfigured: %s", unhandled)
+        LOG.warning(
+            "The following packages were installed and preseeded, "
+            "but cannot be unconfigured: %s",
+            unhandled,
+        )
 
     if len(to_config):
-        subp.subp(['dpkg-reconfigure', '--frontend=noninteractive'] +
-                  list(to_config), data=None, target=target, capture=True)
+        subp.subp(
+            ["dpkg-reconfigure", "--frontend=noninteractive"]
+            + list(to_config),
+            data=None,
+            target=target,
+            capture=True,
+        )
 
 
 def apply_debconf_selections(cfg, target=None):
@@ -546,13 +583,12 @@ def apply_debconf_selections(cfg, target=None):
     #  set1: |
     #   cloud-init cloud-init/datasources multiselect MAAS
     #  set2: pkg pkg/value string bar
-    selsets = cfg.get('debconf_selections')
+    selsets = cfg.get("debconf_selections")
     if not selsets:
         LOG.debug("debconf_selections was not set in config")
         return
 
-    selections = '\n'.join(
-        [selsets[key] for key in sorted(selsets.keys())])
+    selections = "\n".join([selsets[key] for key in sorted(selsets.keys())])
     debconf_set_selections(selections.encode(), target=target)
 
     # get a complete list of packages listed in input
@@ -579,7 +615,8 @@ def apply_debconf_selections(cfg, target=None):
 def clean_cloud_init(target):
     """clean out any local cloud-init config"""
     flist = glob.glob(
-        subp.target_path(target, "/etc/cloud/cloud.cfg.d/*dpkg*"))
+        subp.target_path(target, "/etc/cloud/cloud.cfg.d/*dpkg*")
+    )
 
     LOG.debug("cleaning cloud-init config from: %s", flist)
     for dpkg_cfg in flist:
@@ -588,18 +625,18 @@ def clean_cloud_init(target):
 
 def mirrorurl_to_apt_fileprefix(mirror):
     """mirrorurl_to_apt_fileprefix
-       Convert a mirror url to the file prefix used by apt on disk to
-       store cache information for that mirror.
-       To do so do:
-       - take off ???://
-       - drop tailing /
-       - convert in string / to _"""
+    Convert a mirror url to the file prefix used by apt on disk to
+    store cache information for that mirror.
+    To do so do:
+    - take off ???://
+    - drop tailing /
+    - convert in string / to _"""
     string = mirror
     if string.endswith("/"):
         string = string[0:-1]
     pos = string.find("://")
     if pos >= 0:
-        string = string[pos + 3:]
+        string = string[pos + 3 :]
     string = string.replace("/", "_")
     return string
 
@@ -631,8 +668,8 @@ def rename_apt_lists(new_mirrors, target, arch):
 
 def mirror_to_placeholder(tmpl, mirror, placeholder):
     """mirror_to_placeholder
-       replace the specified mirror in a template with a placeholder string
-       Checks for existance of the expected mirror and warns if not found"""
+    replace the specified mirror in a template with a placeholder string
+    Checks for existance of the expected mirror and warns if not found"""
     if mirror not in tmpl:
         LOG.warning("Expected mirror '%s' not found in: %s", mirror, tmpl)
     return tmpl.replace(mirror, placeholder)
@@ -640,13 +677,15 @@ def mirror_to_placeholder(tmpl, mirror, placeholder):
 
 def map_known_suites(suite):
     """there are a few default names which will be auto-extended.
-       This comes at the inability to use those names literally as suites,
-       but on the other hand increases readability of the cfg quite a lot"""
-    mapping = {'updates': '$RELEASE-updates',
-               'backports': '$RELEASE-backports',
-               'security': '$RELEASE-security',
-               'proposed': '$RELEASE-proposed',
-               'release': '$RELEASE'}
+    This comes at the inability to use those names literally as suites,
+    but on the other hand increases readability of the cfg quite a lot"""
+    mapping = {
+        "updates": "$RELEASE-updates",
+        "backports": "$RELEASE-backports",
+        "security": "$RELEASE-security",
+        "proposed": "$RELEASE-proposed",
+        "release": "$RELEASE",
+    }
     try:
         retsuite = mapping[suite]
     except KeyError:
@@ -656,14 +695,14 @@ def map_known_suites(suite):
 
 def disable_suites(disabled, src, release):
     """reads the config for suites to be disabled and removes those
-       from the template"""
+    from the template"""
     if not disabled:
         return src
 
     retsrc = src
     for suite in disabled:
         suite = map_known_suites(suite)
-        releasesuite = templater.render_string(suite, {'RELEASE': release})
+        releasesuite = templater.render_string(suite, {"RELEASE": release})
         LOG.debug("Disabling suite %s as %s", suite, releasesuite)
 
         newsrc = ""
@@ -685,7 +724,7 @@ def disable_suites(disabled, src, release):
                             break
 
                 if cols[pcol] == releasesuite:
-                    line = '# suite disabled by cloud-init: %s' % line
+                    line = "# suite disabled by cloud-init: %s" % line
             newsrc += line
         retsrc = newsrc
 
@@ -694,36 +733,38 @@ def disable_suites(disabled, src, release):
 
 def add_mirror_keys(cfg, target):
     """Adds any keys included in the primary/security mirror clauses"""
-    for key in ('primary', 'security'):
+    for key in ("primary", "security"):
         for mirror in cfg.get(key, []):
             add_apt_key(mirror, target, file_name=key)
 
 
 def generate_sources_list(cfg, release, mirrors, cloud):
     """generate_sources_list
-       create a source.list file based on a custom or default template
-       by replacing mirrors and release in the template"""
+    create a source.list file based on a custom or default template
+    by replacing mirrors and release in the template"""
     aptsrc = "/etc/apt/sources.list"
-    params = {'RELEASE': release, 'codename': release}
+    params = {"RELEASE": release, "codename": release}
     for k in mirrors:
         params[k] = mirrors[k]
         params[k.lower()] = mirrors[k]
 
-    tmpl = cfg.get('sources_list', None)
+    tmpl = cfg.get("sources_list", None)
     if tmpl is None:
         LOG.info("No custom template provided, fall back to builtin")
-        template_fn = cloud.get_template_filename('sources.list.%s' %
-                                                  (cloud.distro.name))
+        template_fn = cloud.get_template_filename(
+            "sources.list.%s" % (cloud.distro.name)
+        )
         if not template_fn:
-            template_fn = cloud.get_template_filename('sources.list')
+            template_fn = cloud.get_template_filename("sources.list")
         if not template_fn:
-            LOG.warning("No template found, "
-                        "not rendering /etc/apt/sources.list")
+            LOG.warning(
+                "No template found, not rendering /etc/apt/sources.list"
+            )
             return
         tmpl = util.load_file(template_fn)
 
     rendered = templater.render_string(tmpl, params)
-    disabled = disable_suites(cfg.get('disable_suites'), rendered, release)
+    disabled = disable_suites(cfg.get("disable_suites"), rendered, release)
     util.write_file(aptsrc, disabled, mode=0o644)
 
 
@@ -735,7 +776,7 @@ def add_apt_key_raw(key, file_name, hardened=False, target=None):
     LOG.debug("Adding key:\n'%s'", key)
     try:
         name = pathlib.Path(file_name).stem
-        return apt_key('add', output_file=name, data=key, hardened=hardened)
+        return apt_key("add", output_file=name, data=key, hardened=hardened)
     except subp.ProcessExecutionError:
         LOG.exception("failed to add apt GPG Key to apt keyring")
         raise
@@ -747,26 +788,26 @@ def add_apt_key(ent, target=None, hardened=False, file_name=None):
     Supports raw keys or keyid's
     The latter will as a first step fetched to get the raw key
     """
-    if 'keyid' in ent and 'key' not in ent:
+    if "keyid" in ent and "key" not in ent:
         keyserver = DEFAULT_KEYSERVER
-        if 'keyserver' in ent:
-            keyserver = ent['keyserver']
+        if "keyserver" in ent:
+            keyserver = ent["keyserver"]
 
-        ent['key'] = gpg.getkeybyid(ent['keyid'], keyserver)
+        ent["key"] = gpg.getkeybyid(ent["keyid"], keyserver)
 
-    if 'key' in ent:
+    if "key" in ent:
         return add_apt_key_raw(
-            ent['key'],
-            file_name or ent['filename'],
-            hardened=hardened)
+            ent["key"], file_name or ent["filename"], hardened=hardened
+        )
 
 
 def update_packages(cloud):
     cloud.distro.update_package_sources()
 
 
-def add_apt_sources(srcdict, cloud, target=None, template_params=None,
-                    aa_repo_match=None):
+def add_apt_sources(
+    srcdict, cloud, target=None, template_params=None, aa_repo_match=None
+):
     """
     install keys and repo source .list files defined in 'sources'
 
@@ -795,33 +836,34 @@ def add_apt_sources(srcdict, cloud, target=None, template_params=None,
         template_params = {}
 
     if aa_repo_match is None:
-        raise ValueError('did not get a valid repo matcher')
+        raise ValueError("did not get a valid repo matcher")
 
     if not isinstance(srcdict, dict):
-        raise TypeError('unknown apt format: %s' % (srcdict))
+        raise TypeError("unknown apt format: %s" % (srcdict))
 
     for filename in srcdict:
         ent = srcdict[filename]
         LOG.debug("adding source/key '%s'", ent)
-        if 'filename' not in ent:
-            ent['filename'] = filename
+        if "filename" not in ent:
+            ent["filename"] = filename
 
-        if 'source' in ent and '$KEY_FILE' in ent['source']:
+        if "source" in ent and "$KEY_FILE" in ent["source"]:
             key_file = add_apt_key(ent, target, hardened=True)
-            template_params['KEY_FILE'] = key_file
+            template_params["KEY_FILE"] = key_file
         else:
             key_file = add_apt_key(ent, target)
 
-        if 'source' not in ent:
+        if "source" not in ent:
             continue
-        source = ent['source']
+        source = ent["source"]
         source = templater.render_string(source, template_params)
 
-        if not ent['filename'].startswith("/"):
-            ent['filename'] = os.path.join("/etc/apt/sources.list.d/",
-                                           ent['filename'])
-        if not ent['filename'].endswith(".list"):
-            ent['filename'] += ".list"
+        if not ent["filename"].startswith("/"):
+            ent["filename"] = os.path.join(
+                "/etc/apt/sources.list.d/", ent["filename"]
+            )
+        if not ent["filename"].endswith(".list"):
+            ent["filename"] += ".list"
 
         if aa_repo_match(source):
             try:
@@ -831,7 +873,7 @@ def add_apt_sources(srcdict, cloud, target=None, template_params=None,
                 raise
             continue
 
-        sourcefn = subp.target_path(target, ent['filename'])
+        sourcefn = subp.target_path(target, ent["filename"])
         try:
             contents = "%s\n" % (source)
             util.write_file(sourcefn, contents, omode="a")
@@ -850,14 +892,14 @@ def convert_v1_to_v2_apt_format(srclist):
     if isinstance(srclist, list):
         LOG.debug("apt config: convert V1 to V2 format (source list to dict)")
         for srcent in srclist:
-            if 'filename' not in srcent:
+            if "filename" not in srcent:
                 # file collides for multiple !filename cases for compatibility
                 # yet we need them all processed, so not same dictionary key
-                srcent['filename'] = "cloud_config_sources.list"
+                srcent["filename"] = "cloud_config_sources.list"
                 key = util.rand_dict_key(srcdict, "cloud_config_sources.list")
             else:
                 # all with filename use that as key (matching new format)
-                key = srcent['filename']
+                key = srcent["filename"]
             srcdict[key] = srcent
     elif isinstance(srclist, dict):
         srcdict = srclist
@@ -869,7 +911,7 @@ def convert_v1_to_v2_apt_format(srclist):
 
 def convert_key(oldcfg, aptcfg, oldkey, newkey):
     """convert an old key to the new one if the old one exists
-       returns true if a key was found and converted"""
+    returns true if a key was found and converted"""
     if oldcfg.get(oldkey, None) is not None:
         aptcfg[newkey] = oldcfg.get(oldkey)
         del oldcfg[oldkey]
@@ -879,33 +921,37 @@ def convert_key(oldcfg, aptcfg, oldkey, newkey):
 
 def convert_mirror(oldcfg, aptcfg):
     """convert old apt_mirror keys into the new more advanced mirror spec"""
-    keymap = [('apt_mirror', 'uri'),
-              ('apt_mirror_search', 'search'),
-              ('apt_mirror_search_dns', 'search_dns')]
+    keymap = [
+        ("apt_mirror", "uri"),
+        ("apt_mirror_search", "search"),
+        ("apt_mirror_search_dns", "search_dns"),
+    ]
     converted = False
-    newmcfg = {'arches': ['default']}
+    newmcfg = {"arches": ["default"]}
     for oldkey, newkey in keymap:
         if convert_key(oldcfg, newmcfg, oldkey, newkey):
             converted = True
 
     # only insert new style config if anything was converted
     if converted:
-        aptcfg['primary'] = [newmcfg]
+        aptcfg["primary"] = [newmcfg]
 
 
 def convert_v2_to_v3_apt_format(oldcfg):
     """convert old to new keys and adapt restructured mirror spec"""
-    mapoldkeys = {'apt_sources': 'sources',
-                  'apt_mirror': None,
-                  'apt_mirror_search': None,
-                  'apt_mirror_search_dns': None,
-                  'apt_proxy': 'proxy',
-                  'apt_http_proxy': 'http_proxy',
-                  'apt_ftp_proxy': 'https_proxy',
-                  'apt_https_proxy': 'ftp_proxy',
-                  'apt_preserve_sources_list': 'preserve_sources_list',
-                  'apt_custom_sources_list': 'sources_list',
-                  'add_apt_repo_match': 'add_apt_repo_match'}
+    mapoldkeys = {
+        "apt_sources": "sources",
+        "apt_mirror": None,
+        "apt_mirror_search": None,
+        "apt_mirror_search_dns": None,
+        "apt_proxy": "proxy",
+        "apt_http_proxy": "http_proxy",
+        "apt_ftp_proxy": "https_proxy",
+        "apt_https_proxy": "ftp_proxy",
+        "apt_preserve_sources_list": "preserve_sources_list",
+        "apt_custom_sources_list": "sources_list",
+        "add_apt_repo_match": "add_apt_repo_match",
+    }
     needtoconvert = []
     for oldkey in mapoldkeys:
         if oldkey in oldcfg:
@@ -917,11 +963,13 @@ def convert_v2_to_v3_apt_format(oldcfg):
     # no old config, so no new one to be created
     if not needtoconvert:
         return oldcfg
-    LOG.debug("apt config: convert V2 to V3 format for keys '%s'",
-              ", ".join(needtoconvert))
+    LOG.debug(
+        "apt config: convert V2 to V3 format for keys '%s'",
+        ", ".join(needtoconvert),
+    )
 
     # if old AND new config are provided, prefer the new one (LP #1616831)
-    newaptcfg = oldcfg.get('apt', None)
+    newaptcfg = oldcfg.get("apt", None)
     if newaptcfg is not None:
         LOG.debug("apt config: V1/2 and V3 format specified, preferring V3")
         for oldkey in needtoconvert:
@@ -932,10 +980,11 @@ def convert_v2_to_v3_apt_format(oldcfg):
                 # no simple mapping or no collision on this particular key
                 continue
             if verify != newaptcfg[newkey]:
-                raise ValueError("Old and New apt format defined with unequal "
-                                 "values %s vs %s @ %s" % (verify,
-                                                           newaptcfg[newkey],
-                                                           oldkey))
+                raise ValueError(
+                    "Old and New apt format defined with unequal "
+                    "values %s vs %s @ %s"
+                    % (verify, newaptcfg[newkey], oldkey)
+                )
         # return conf after clearing conflicting V1/2 keys
         return oldcfg
 
@@ -955,17 +1004,17 @@ def convert_v2_to_v3_apt_format(oldcfg):
             raise ValueError("old apt key '%s' left after conversion" % oldkey)
 
     # insert new format into config and return full cfg with only v3 content
-    oldcfg['apt'] = aptcfg
+    oldcfg["apt"] = aptcfg
     return oldcfg
 
 
 def convert_to_v3_apt_format(cfg):
     """convert the old list based format to the new dict based one. After that
-       convert the old dict keys/format to v3 a.k.a 'new apt config'"""
+    convert the old dict keys/format to v3 a.k.a 'new apt config'"""
     # V1 -> V2, the apt_sources entry from list to dict
-    apt_sources = cfg.get('apt_sources', None)
+    apt_sources = cfg.get("apt_sources", None)
     if apt_sources is not None:
-        cfg['apt_sources'] = convert_v1_to_v2_apt_format(apt_sources)
+        cfg["apt_sources"] = convert_v1_to_v2_apt_format(apt_sources)
 
     # V2 -> V3, move all former globals under the "apt" key
     # Restructure into new key names and mirror hierarchy
@@ -997,7 +1046,12 @@ def search_for_mirror_dns(configured, mirrortype, cfg, cloud):
         if mydom:
             doms.append(".%s" % mydom)
 
-        doms.extend((".localdomain", "",))
+        doms.extend(
+            (
+                ".localdomain",
+                "",
+            )
+        )
 
         mirror_list = []
         distro = cloud.distro.name
@@ -1012,12 +1066,11 @@ def search_for_mirror_dns(configured, mirrortype, cfg, cloud):
 
 def update_mirror_info(pmirror, smirror, arch, cloud):
     """sets security mirror to primary if not defined.
-       returns defaults if no mirrors are defined"""
+    returns defaults if no mirrors are defined"""
     if pmirror is not None:
         if smirror is None:
             smirror = pmirror
-        return {'PRIMARY': pmirror,
-                'SECURITY': smirror}
+        return {"PRIMARY": pmirror, "SECURITY": smirror}
 
     # None specified at all, get default mirrors from cloud
     mirror_info = cloud.datasource.get_package_mirror_info()
@@ -1026,8 +1079,8 @@ def update_mirror_info(pmirror, smirror, arch, cloud):
         # arbitrary key/value pairs including 'primary' and 'security' keys.
         # caller expects dict with PRIMARY and SECURITY.
         m = mirror_info.copy()
-        m['PRIMARY'] = m['primary']
-        m['SECURITY'] = m['security']
+        m["PRIMARY"] = m["primary"]
+        m["SECURITY"] = m["security"]
 
         return m
 
@@ -1037,7 +1090,7 @@ def update_mirror_info(pmirror, smirror, arch, cloud):
 
 def get_arch_mirrorconfig(cfg, mirrortype, arch):
     """out of a list of potential mirror configurations select
-       and return the one matching the architecture (or default)"""
+    and return the one matching the architecture (or default)"""
     # select the mirror specification (if-any)
     mirror_cfg_list = cfg.get(mirrortype, None)
     if mirror_cfg_list is None:
@@ -1056,8 +1109,8 @@ def get_arch_mirrorconfig(cfg, mirrortype, arch):
 
 def get_mirror(cfg, mirrortype, arch, cloud):
     """pass the three potential stages of mirror specification
-       returns None is neither of them found anything otherwise the first
-       hit is returned"""
+    returns None is neither of them found anything otherwise the first
+    hit is returned"""
     mcfg = get_arch_mirrorconfig(cfg, mirrortype, arch)
     if mcfg is None:
         return None
@@ -1073,18 +1126,19 @@ def get_mirror(cfg, mirrortype, arch, cloud):
     # fallback to search_dns if specified
     if mirror is None:
         # list of mirrors to try to resolve
-        mirror = search_for_mirror_dns(mcfg.get("search_dns", None),
-                                       mirrortype, cfg, cloud)
+        mirror = search_for_mirror_dns(
+            mcfg.get("search_dns", None), mirrortype, cfg, cloud
+        )
 
     return mirror
 
 
 def find_apt_mirror_info(cfg, cloud, arch=None):
     """find_apt_mirror_info
-       find an apt_mirror given the cfg provided.
-       It can check for separate config of primary and security mirrors
-       If only primary is given security is assumed to be equal to primary
-       If the generic apt_mirror is given that is defining for both
+    find an apt_mirror given the cfg provided.
+    It can check for separate config of primary and security mirrors
+    If only primary is given security is assumed to be equal to primary
+    If the generic apt_mirror is given that is defining for both
     """
 
     if arch is None:
@@ -1105,32 +1159,35 @@ def find_apt_mirror_info(cfg, cloud, arch=None):
 
 def apply_apt_config(cfg, proxy_fname, config_fname):
     """apply_apt_config
-       Applies any apt*proxy config from if specified
+    Applies any apt*proxy config from if specified
     """
     # Set up any apt proxy
-    cfgs = (('proxy', 'Acquire::http::Proxy "%s";'),
-            ('http_proxy', 'Acquire::http::Proxy "%s";'),
-            ('ftp_proxy', 'Acquire::ftp::Proxy "%s";'),
-            ('https_proxy', 'Acquire::https::Proxy "%s";'))
+    cfgs = (
+        ("proxy", 'Acquire::http::Proxy "%s";'),
+        ("http_proxy", 'Acquire::http::Proxy "%s";'),
+        ("ftp_proxy", 'Acquire::ftp::Proxy "%s";'),
+        ("https_proxy", 'Acquire::https::Proxy "%s";'),
+    )
 
     proxies = [fmt % cfg.get(name) for (name, fmt) in cfgs if cfg.get(name)]
     if len(proxies):
         LOG.debug("write apt proxy info to %s", proxy_fname)
-        util.write_file(proxy_fname, '\n'.join(proxies) + '\n')
+        util.write_file(proxy_fname, "\n".join(proxies) + "\n")
     elif os.path.isfile(proxy_fname):
         util.del_file(proxy_fname)
         LOG.debug("no apt proxy configured, removed %s", proxy_fname)
 
-    if cfg.get('conf', None):
+    if cfg.get("conf", None):
         LOG.debug("write apt config info to %s", config_fname)
-        util.write_file(config_fname, cfg.get('conf'))
+        util.write_file(config_fname, cfg.get("conf"))
     elif os.path.isfile(config_fname):
         util.del_file(config_fname)
         LOG.debug("no apt config configured, removed %s", config_fname)
 
 
-def apt_key(command, output_file=None, data=None, hardened=False,
-            human_output=True):
+def apt_key(
+    command, output_file=None, data=None, hardened=False, human_output=True
+):
     """apt-key replacement
 
     commands implemented: 'add', 'list', 'finger'
@@ -1153,32 +1210,36 @@ def apt_key(command, output_file=None, data=None, hardened=False,
         key_files = [APT_LOCAL_KEYS] if os.path.isfile(APT_LOCAL_KEYS) else []
 
         for file in os.listdir(APT_TRUSTED_GPG_DIR):
-            if file.endswith('.gpg') or file.endswith('.asc'):
+            if file.endswith(".gpg") or file.endswith(".asc"):
                 key_files.append(APT_TRUSTED_GPG_DIR + file)
-        return key_files if key_files else ''
+        return key_files if key_files else ""
 
     def apt_key_add():
         """apt-key add <file>
 
         returns filepath to new keyring, or '/dev/null' when an error occurs
         """
-        file_name = '/dev/null'
+        file_name = "/dev/null"
         if not output_file:
             util.logexc(
-                LOG, 'Unknown filename, failed to add key: "{}"'.format(data))
+                LOG, 'Unknown filename, failed to add key: "{}"'.format(data)
+            )
         else:
             try:
-                key_dir = \
+                key_dir = (
                     CLOUD_INIT_GPG_DIR if hardened else APT_TRUSTED_GPG_DIR
+                )
                 stdout = gpg.dearmor(data)
-                file_name = '{}{}.gpg'.format(key_dir, output_file)
+                file_name = "{}{}.gpg".format(key_dir, output_file)
                 util.write_file(file_name, stdout)
             except subp.ProcessExecutionError:
-                util.logexc(LOG, 'Gpg error, failed to add key: {}'.format(
-                    data))
+                util.logexc(
+                    LOG, "Gpg error, failed to add key: {}".format(data)
+                )
             except UnicodeDecodeError:
-                util.logexc(LOG, 'Decode error, failed to add key: {}'.format(
-                    data))
+                util.logexc(
+                    LOG, "Decode error, failed to add key: {}".format(data)
+                )
         return file_name
 
     def apt_key_list():
@@ -1193,19 +1254,20 @@ def apt_key(command, output_file=None, data=None, hardened=False,
                 key_list.append(gpg.list(key_file, human_output=human_output))
             except subp.ProcessExecutionError as error:
                 LOG.warning('Failed to list key "%s": %s', key_file, error)
-        return '\n'.join(key_list)
+        return "\n".join(key_list)
 
-    if command == 'add':
+    if command == "add":
         return apt_key_add()
-    elif command == 'finger' or command == 'list':
+    elif command == "finger" or command == "list":
         return apt_key_list()
     else:
         raise ValueError(
-            'apt_key() commands add, list, and finger are currently supported')
+            "apt_key() commands add, list, and finger are currently supported"
+        )
 
 
 CONFIG_CLEANERS = {
-    'cloud-init': clean_cloud_init,
+    "cloud-init": clean_cloud_init,
 }
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_apt_pipelining.py b/cloudinit/config/cc_apt_pipelining.py
index aa186ce2..569849d1 100644
--- a/cloudinit/config/cc_apt_pipelining.py
+++ b/cloudinit/config/cc_apt_pipelining.py
@@ -29,17 +29,19 @@ not recommended.
     apt_pipelining: <false/none/unchanged/os/number>
 """
 
-from cloudinit.settings import PER_INSTANCE
 from cloudinit import util
+from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
 
-distros = ['ubuntu', 'debian']
+distros = ["ubuntu", "debian"]
 
 DEFAULT_FILE = "/etc/apt/apt.conf.d/90cloud-init-pipelining"
 
-APT_PIPE_TPL = ("//Written by cloud-init per 'apt_pipelining'\n"
-                'Acquire::http::Pipeline-Depth "%s";\n')
+APT_PIPE_TPL = (
+    "//Written by cloud-init per 'apt_pipelining'\n"
+    'Acquire::http::Pipeline-Depth "%s";\n'
+)
 
 # Acquire::http::Pipeline-Depth can be a value
 # from 0 to 5 indicating how many outstanding requests APT should send.
@@ -49,7 +51,7 @@ APT_PIPE_TPL = ("//Written by cloud-init per 'apt_pipelining'\n"
 
 def handle(_name, cfg, _cloud, log, _args):
 
-    apt_pipe_value = util.get_cfg_option_str(cfg, "apt_pipelining", 'os')
+    apt_pipe_value = util.get_cfg_option_str(cfg, "apt_pipelining", "os")
     apt_pipe_value_s = str(apt_pipe_value).lower().strip()
 
     if apt_pipe_value_s == "false":
@@ -69,4 +71,5 @@ def write_apt_snippet(setting, log, f_name):
     util.write_file(f_name, file_contents)
     log.debug("Wrote %s with apt pipeline depth setting %s", f_name, setting)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_bootcmd.py b/cloudinit/config/cc_bootcmd.py
index 06f7a26e..bff11a24 100644
--- a/cloudinit/config/cc_bootcmd.py
+++ b/cloudinit/config/cc_bootcmd.py
@@ -12,11 +12,9 @@
 import os
 from textwrap import dedent
 
+from cloudinit import subp, temp_utils, util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_ALWAYS
-from cloudinit import temp_utils
-from cloudinit import subp
-from cloudinit import util
 
 frequency = PER_ALWAYS
 
@@ -26,13 +24,14 @@ frequency = PER_ALWAYS
 # configuration options before actually attempting to deploy with said
 # configuration.
 
-distros = ['all']
+distros = ["all"]
 
 meta = {
-    'id': 'cc_bootcmd',
-    'name': 'Bootcmd',
-    'title': 'Run arbitrary commands early in the boot process',
-    'description': dedent("""\
+    "id": "cc_bootcmd",
+    "name": "Bootcmd",
+    "title": "Run arbitrary commands early in the boot process",
+    "description": dedent(
+        """\
         This module runs arbitrary commands very early in the boot process,
         only slightly after a boothook would run. This is very similar to a
         boothook, but more user friendly. The environment variable
@@ -48,31 +47,37 @@ meta = {
 
           when writing files, do not use /tmp dir as it races with
           systemd-tmpfiles-clean LP: #1707222. Use /run/somedir instead.
-    """),
-    'distros': distros,
-    'examples': [dedent("""\
+    """
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         bootcmd:
             - echo 192.168.1.130 us.archive.ubuntu.com > /etc/hosts
             - [ cloud-init-per, once, mymkfs, mkfs, /dev/vdb ]
-    """)],
-    'frequency': PER_ALWAYS,
+    """
+        )
+    ],
+    "frequency": PER_ALWAYS,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'bootcmd': {
-            'type': 'array',
-            'items': {
-                'oneOf': [
-                    {'type': 'array', 'items': {'type': 'string'}},
-                    {'type': 'string'}]
+    "type": "object",
+    "properties": {
+        "bootcmd": {
+            "type": "array",
+            "items": {
+                "oneOf": [
+                    {"type": "array", "items": {"type": "string"}},
+                    {"type": "string"},
+                ]
             },
-            'additionalItems': False,  # Reject items of non-string non-list
-            'additionalProperties': False,
-            'minItems': 1,
+            "additionalItems": False,  # Reject items of non-string non-list
+            "additionalProperties": False,
+            "minItems": 1,
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -81,8 +86,9 @@ __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 def handle(name, cfg, cloud, log, _args):
 
     if "bootcmd" not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'bootcmd' key in configuration"), name)
+        log.debug(
+            "Skipping module named %s, no 'bootcmd' key in configuration", name
+        )
         return
 
     validate_cloudconfig_schema(cfg, schema)
@@ -99,11 +105,12 @@ def handle(name, cfg, cloud, log, _args):
             env = os.environ.copy()
             iid = cloud.get_instance_id()
             if iid:
-                env['INSTANCE_ID'] = str(iid)
-            cmd = ['/bin/sh', tmpf.name]
+                env["INSTANCE_ID"] = str(iid)
+            cmd = ["/bin/sh", tmpf.name]
             subp.subp(cmd, env=env, capture=False)
         except Exception:
             util.logexc(log, "Failed to run bootcmd module %s", name)
             raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_byobu.py b/cloudinit/config/cc_byobu.py
index 9fdaeba1..53b6d0c8 100755
--- a/cloudinit/config/cc_byobu.py
+++ b/cloudinit/config/cc_byobu.py
@@ -38,11 +38,10 @@ Valid configuration options for this module are:
     byobu_by_default: <user/system>
 """
 
+from cloudinit import subp, util
 from cloudinit.distros import ug_util
-from cloudinit import subp
-from cloudinit import util
 
-distros = ['ubuntu', 'debian']
+distros = ["ubuntu", "debian"]
 
 
 def handle(name, cfg, cloud, log, args):
@@ -58,8 +57,14 @@ def handle(name, cfg, cloud, log, args):
     if value == "user" or value == "system":
         value = "enable-%s" % value
 
-    valid = ("enable-user", "enable-system", "enable",
-             "disable-user", "disable-system", "disable")
+    valid = (
+        "enable-user",
+        "enable-system",
+        "enable",
+        "disable-user",
+        "disable-system",
+        "disable",
+    )
     if value not in valid:
         log.warning("Unknown value %s for byobu_by_default", value)
 
@@ -81,13 +86,16 @@ def handle(name, cfg, cloud, log, args):
         (users, _groups) = ug_util.normalize_users_groups(cfg, cloud.distro)
         (user, _user_config) = ug_util.extract_default(users)
         if not user:
-            log.warning(("No default byobu user provided, "
-                         "can not launch %s for the default user"), bl_inst)
+            log.warning(
+                "No default byobu user provided, "
+                "can not launch %s for the default user",
+                bl_inst,
+            )
         else:
-            shcmd += " sudo -Hu \"%s\" byobu-launcher-%s" % (user, bl_inst)
+            shcmd += ' sudo -Hu "%s" byobu-launcher-%s' % (user, bl_inst)
             shcmd += " || X=$(($X+1)); "
     if mod_sys:
-        shcmd += "echo \"%s\" | debconf-set-selections" % dc_val
+        shcmd += 'echo "%s" | debconf-set-selections' % dc_val
         shcmd += " && dpkg-reconfigure byobu --frontend=noninteractive"
         shcmd += " || X=$(($X+1)); "
 
@@ -96,4 +104,5 @@ def handle(name, cfg, cloud, log, args):
         log.debug("Setting byobu to %s", value)
         subp.subp(cmd, capture=False)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_ca_certs.py b/cloudinit/config/cc_ca_certs.py
index bd7bead9..9de065ab 100644
--- a/cloudinit/config/cc_ca_certs.py
+++ b/cloudinit/config/cc_ca_certs.py
@@ -41,28 +41,27 @@ can be removed from the system with the configuration option
 
 import os
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 DEFAULT_CONFIG = {
-    'ca_cert_path': '/usr/share/ca-certificates/',
-    'ca_cert_filename': 'cloud-init-ca-certs.crt',
-    'ca_cert_config': '/etc/ca-certificates.conf',
-    'ca_cert_system_path': '/etc/ssl/certs/',
-    'ca_cert_update_cmd': ['update-ca-certificates']
+    "ca_cert_path": "/usr/share/ca-certificates/",
+    "ca_cert_filename": "cloud-init-ca-certs.crt",
+    "ca_cert_config": "/etc/ca-certificates.conf",
+    "ca_cert_system_path": "/etc/ssl/certs/",
+    "ca_cert_update_cmd": ["update-ca-certificates"],
 }
 DISTRO_OVERRIDES = {
-    'rhel': {
-        'ca_cert_path': '/usr/share/pki/ca-trust-source/',
-        'ca_cert_filename': 'anchors/cloud-init-ca-certs.crt',
-        'ca_cert_config': None,
-        'ca_cert_system_path': '/etc/pki/ca-trust/',
-        'ca_cert_update_cmd': ['update-ca-trust']
+    "rhel": {
+        "ca_cert_path": "/usr/share/pki/ca-trust-source/",
+        "ca_cert_filename": "anchors/cloud-init-ca-certs.crt",
+        "ca_cert_config": None,
+        "ca_cert_system_path": "/etc/pki/ca-trust/",
+        "ca_cert_update_cmd": ["update-ca-trust"],
     }
 }
 
 
-distros = ['alpine', 'debian', 'ubuntu', 'rhel']
+distros = ["alpine", "debian", "ubuntu", "rhel"]
 
 
 def _distro_ca_certs_configs(distro_name):
@@ -72,8 +71,9 @@ def _distro_ca_certs_configs(distro_name):
     @returns: Dict of distro configurations for ca-cert.
     """
     cfg = DISTRO_OVERRIDES.get(distro_name, DEFAULT_CONFIG)
-    cfg['ca_cert_full_path'] = os.path.join(cfg['ca_cert_path'],
-                                            cfg['ca_cert_filename'])
+    cfg["ca_cert_full_path"] = os.path.join(
+        cfg["ca_cert_path"], cfg["ca_cert_filename"]
+    )
     return cfg
 
 
@@ -83,7 +83,7 @@ def update_ca_certs(distro_cfg):
 
     @param distro_cfg: A hash providing _distro_ca_certs_configs function.
     """
-    subp.subp(distro_cfg['ca_cert_update_cmd'], capture=False)
+    subp.subp(distro_cfg["ca_cert_update_cmd"], capture=False)
 
 
 def add_ca_certs(distro_cfg, certs):
@@ -98,9 +98,9 @@ def add_ca_certs(distro_cfg, certs):
         return
     # First ensure they are strings...
     cert_file_contents = "\n".join([str(c) for c in certs])
-    util.write_file(distro_cfg['ca_cert_full_path'],
-                    cert_file_contents,
-                    mode=0o644)
+    util.write_file(
+        distro_cfg["ca_cert_full_path"], cert_file_contents, mode=0o644
+    )
     update_cert_config(distro_cfg)
 
 
@@ -110,23 +110,27 @@ def update_cert_config(distro_cfg):
 
     @param distro_cfg: A hash providing _distro_ca_certs_configs function.
     """
-    if distro_cfg['ca_cert_config'] is None:
+    if distro_cfg["ca_cert_config"] is None:
         return
-    if os.stat(distro_cfg['ca_cert_config']).st_size == 0:
+    if os.stat(distro_cfg["ca_cert_config"]).st_size == 0:
         # If the CA_CERT_CONFIG file is empty (i.e. all existing
         # CA certs have been deleted) then simply output a single
         # line with the cloud-init cert filename.
-        out = "%s\n" % distro_cfg['ca_cert_filename']
+        out = "%s\n" % distro_cfg["ca_cert_filename"]
     else:
         # Append cert filename to CA_CERT_CONFIG file.
         # We have to strip the content because blank lines in the file
         # causes subsequent entries to be ignored. (LP: #1077020)
-        orig = util.load_file(distro_cfg['ca_cert_config'])
-        cr_cont = '\n'.join([line for line in orig.splitlines()
-                            if line != distro_cfg['ca_cert_filename']])
-        out = "%s\n%s\n" % (cr_cont.rstrip(),
-                            distro_cfg['ca_cert_filename'])
-    util.write_file(distro_cfg['ca_cert_config'], out, omode="wb")
+        orig = util.load_file(distro_cfg["ca_cert_config"])
+        cr_cont = "\n".join(
+            [
+                line
+                for line in orig.splitlines()
+                if line != distro_cfg["ca_cert_filename"]
+            ]
+        )
+        out = "%s\n%s\n" % (cr_cont.rstrip(), distro_cfg["ca_cert_filename"])
+    util.write_file(distro_cfg["ca_cert_config"], out, omode="wb")
 
 
 def remove_default_ca_certs(distro_name, distro_cfg):
@@ -137,14 +141,15 @@ def remove_default_ca_certs(distro_name, distro_cfg):
     @param distro_name: String providing the distro class name.
     @param distro_cfg: A hash providing _distro_ca_certs_configs function.
     """
-    util.delete_dir_contents(distro_cfg['ca_cert_path'])
-    util.delete_dir_contents(distro_cfg['ca_cert_system_path'])
-    util.write_file(distro_cfg['ca_cert_config'], "", mode=0o644)
+    util.delete_dir_contents(distro_cfg["ca_cert_path"])
+    util.delete_dir_contents(distro_cfg["ca_cert_system_path"])
+    util.write_file(distro_cfg["ca_cert_config"], "", mode=0o644)
 
-    if distro_name in ['debian', 'ubuntu']:
+    if distro_name in ["debian", "ubuntu"]:
         debconf_sel = (
-            "ca-certificates ca-certificates/trust_new_crts " + "select no")
-        subp.subp(('debconf-set-selections', '-'), debconf_sel)
+            "ca-certificates ca-certificates/trust_new_crts " + "select no"
+        )
+        subp.subp(("debconf-set-selections", "-"), debconf_sel)
 
 
 def handle(name, cfg, cloud, log, _args):
@@ -159,11 +164,13 @@ def handle(name, cfg, cloud, log, _args):
     """
     # If there isn't a ca-certs section in the configuration don't do anything
     if "ca-certs" not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'ca-certs' key in configuration"), name)
+        log.debug(
+            "Skipping module named %s, no 'ca-certs' key in configuration",
+            name,
+        )
         return
 
-    ca_cert_cfg = cfg['ca-certs']
+    ca_cert_cfg = cfg["ca-certs"]
     distro_cfg = _distro_ca_certs_configs(cloud.distro.name)
 
     # If there is a remove-defaults option set to true, remove the system
@@ -183,4 +190,5 @@ def handle(name, cfg, cloud, log, _args):
     log.debug("Updating certificates")
     update_ca_certs(distro_cfg)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_chef.py b/cloudinit/config/cc_chef.py
index ed734d1c..67889683 100644
--- a/cloudinit/config/cc_chef.py
+++ b/cloudinit/config/cc_chef.py
@@ -13,87 +13,91 @@ import json
 import os
 from textwrap import dedent
 
-from cloudinit import subp
+from cloudinit import subp, temp_utils, templater, url_helper, util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
-from cloudinit import templater
-from cloudinit import temp_utils
-from cloudinit import url_helper
-from cloudinit import util
 from cloudinit.settings import PER_ALWAYS
 
-
 RUBY_VERSION_DEFAULT = "1.8"
 
-CHEF_DIRS = tuple([
-    '/etc/chef',
-    '/var/log/chef',
-    '/var/lib/chef',
-    '/var/cache/chef',
-    '/var/backups/chef',
-    '/var/run/chef',
-])
-REQUIRED_CHEF_DIRS = tuple([
-    '/etc/chef',
-])
+CHEF_DIRS = tuple(
+    [
+        "/etc/chef",
+        "/var/log/chef",
+        "/var/lib/chef",
+        "/var/cache/chef",
+        "/var/backups/chef",
+        "/var/run/chef",
+    ]
+)
+REQUIRED_CHEF_DIRS = tuple(
+    [
+        "/etc/chef",
+    ]
+)
 
 # Used if fetching chef from a omnibus style package
 OMNIBUS_URL = "https://www.chef.io/chef/install.sh"
 OMNIBUS_URL_RETRIES = 5
 
-CHEF_VALIDATION_PEM_PATH = '/etc/chef/validation.pem'
-CHEF_ENCRYPTED_DATA_BAG_PATH = '/etc/chef/encrypted_data_bag_secret'
-CHEF_ENVIRONMENT = '_default'
-CHEF_FB_PATH = '/etc/chef/firstboot.json'
+CHEF_VALIDATION_PEM_PATH = "/etc/chef/validation.pem"
+CHEF_ENCRYPTED_DATA_BAG_PATH = "/etc/chef/encrypted_data_bag_secret"
+CHEF_ENVIRONMENT = "_default"
+CHEF_FB_PATH = "/etc/chef/firstboot.json"
 CHEF_RB_TPL_DEFAULTS = {
     # These are ruby symbols...
-    'ssl_verify_mode': ':verify_none',
-    'log_level': ':info',
+    "ssl_verify_mode": ":verify_none",
+    "log_level": ":info",
     # These are not symbols...
-    'log_location': '/var/log/chef/client.log',
-    'validation_key': CHEF_VALIDATION_PEM_PATH,
-    'validation_cert': None,
-    'client_key': '/etc/chef/client.pem',
-    'json_attribs': CHEF_FB_PATH,
-    'file_cache_path': '/var/cache/chef',
-    'file_backup_path': '/var/backups/chef',
-    'pid_file': '/var/run/chef/client.pid',
-    'show_time': True,
-    'encrypted_data_bag_secret': None,
+    "log_location": "/var/log/chef/client.log",
+    "validation_key": CHEF_VALIDATION_PEM_PATH,
+    "validation_cert": None,
+    "client_key": "/etc/chef/client.pem",
+    "json_attribs": CHEF_FB_PATH,
+    "file_cache_path": "/var/cache/chef",
+    "file_backup_path": "/var/backups/chef",
+    "pid_file": "/var/run/chef/client.pid",
+    "show_time": True,
+    "encrypted_data_bag_secret": None,
 }
-CHEF_RB_TPL_BOOL_KEYS = frozenset(['show_time'])
-CHEF_RB_TPL_PATH_KEYS = frozenset([
-    'log_location',
-    'validation_key',
-    'client_key',
-    'file_cache_path',
-    'json_attribs',
-    'pid_file',
-    'encrypted_data_bag_secret',
-])
+CHEF_RB_TPL_BOOL_KEYS = frozenset(["show_time"])
+CHEF_RB_TPL_PATH_KEYS = frozenset(
+    [
+        "log_location",
+        "validation_key",
+        "client_key",
+        "file_cache_path",
+        "json_attribs",
+        "pid_file",
+        "encrypted_data_bag_secret",
+    ]
+)
 CHEF_RB_TPL_KEYS = list(CHEF_RB_TPL_DEFAULTS.keys())
 CHEF_RB_TPL_KEYS.extend(CHEF_RB_TPL_BOOL_KEYS)
 CHEF_RB_TPL_KEYS.extend(CHEF_RB_TPL_PATH_KEYS)
-CHEF_RB_TPL_KEYS.extend([
-    'server_url',
-    'node_name',
-    'environment',
-    'validation_name',
-    'chef_license',
-])
+CHEF_RB_TPL_KEYS.extend(
+    [
+        "server_url",
+        "node_name",
+        "environment",
+        "validation_name",
+        "chef_license",
+    ]
+)
 CHEF_RB_TPL_KEYS = frozenset(CHEF_RB_TPL_KEYS)
-CHEF_RB_PATH = '/etc/chef/client.rb'
-CHEF_EXEC_PATH = '/usr/bin/chef-client'
-CHEF_EXEC_DEF_ARGS = tuple(['-d', '-i', '1800', '-s', '20'])
+CHEF_RB_PATH = "/etc/chef/client.rb"
+CHEF_EXEC_PATH = "/usr/bin/chef-client"
+CHEF_EXEC_DEF_ARGS = tuple(["-d", "-i", "1800", "-s", "20"])
 
 
 frequency = PER_ALWAYS
 distros = ["all"]
 
 meta = {
-    'id': 'cc_chef',
-    'name': 'Chef',
-    'title': 'module that configures, starts and installs chef',
-    'description': dedent("""\
+    "id": "cc_chef",
+    "name": "Chef",
+    "title": "module that configures, starts and installs chef",
+    "description": dedent(
+        """\
         This module enables chef to be installed (from packages,
         gems, or from omnibus). Before this occurs, chef configuration is
         written to disk (validation.pem, client.pem, firstboot.json,
@@ -101,9 +105,12 @@ meta = {
         /var/log/chef and so-on). If configured, chef will be
         installed and started in either daemon or non-daemon mode.
         If run in non-daemon mode, post run actions are executed to do
-        finishing activities such as removing validation.pem."""),
-    'distros': distros,
-    'examples': [dedent("""
+        finishing activities such as removing validation.pem."""
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """
         chef:
           directories:
             - /etc/chef
@@ -124,180 +131,237 @@ meta = {
           omnibus_url_retries: 2
           server_url: https://chef.yourorg.com:4000
           ssl_verify_mode: :verify_peer
-          validation_name: yourorg-validator""")],
-    'frequency': frequency,
+          validation_name: yourorg-validator"""
+        )
+    ],
+    "frequency": frequency,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'chef': {
-            'type': 'object',
-            'additionalProperties': False,
-            'properties': {
-                'directories': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'string'
-                    },
-                    'uniqueItems': True,
-                    'description': dedent("""\
+    "type": "object",
+    "properties": {
+        "chef": {
+            "type": "object",
+            "additionalProperties": False,
+            "properties": {
+                "directories": {
+                    "type": "array",
+                    "items": {"type": "string"},
+                    "uniqueItems": True,
+                    "description": dedent(
+                        """\
                         Create the necessary directories for chef to run. By
                         default, it creates the following directories:
 
-                        {chef_dirs}""").format(
+                        {chef_dirs}"""
+                    ).format(
                         chef_dirs="\n".join(
                             ["   - ``{}``".format(d) for d in CHEF_DIRS]
                         )
-                    )
+                    ),
                 },
-                'validation_cert': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "validation_cert": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         Optional string to be written to file validation_key.
                         Special value ``system`` means set use existing file.
-                        """)
+                        """
+                    ),
                 },
-                'validation_key': {
-                    'type': 'string',
-                    'default': CHEF_VALIDATION_PEM_PATH,
-                    'description': dedent("""\
+                "validation_key": {
+                    "type": "string",
+                    "default": CHEF_VALIDATION_PEM_PATH,
+                    "description": dedent(
+                        """\
                         Optional path for validation_cert. default to
-                        ``{}``.""".format(CHEF_VALIDATION_PEM_PATH))
+                        ``{}``.""".format(
+                            CHEF_VALIDATION_PEM_PATH
+                        )
+                    ),
                 },
-                'firstboot_path': {
-                    'type': 'string',
-                    'default': CHEF_FB_PATH,
-                    'description': dedent("""\
+                "firstboot_path": {
+                    "type": "string",
+                    "default": CHEF_FB_PATH,
+                    "description": dedent(
+                        """\
                         Path to write run_list and initial_attributes keys that
                         should also be present in this configuration, defaults
-                        to ``{}``.""".format(CHEF_FB_PATH))
+                        to ``{}``.""".format(
+                            CHEF_FB_PATH
+                        )
+                    ),
                 },
-                'exec': {
-                    'type': 'boolean',
-                    'default': False,
-                    'description': dedent("""\
+                "exec": {
+                    "type": "boolean",
+                    "default": False,
+                    "description": dedent(
+                        """\
                         define if we should run or not run chef (defaults to
                         false, unless a gem installed is requested where this
-                        will then default to true).""")
+                        will then default to true)."""
+                    ),
                 },
-                'client_key': {
-                    'type': 'string',
-                    'default': CHEF_RB_TPL_DEFAULTS['client_key'],
-                    'description': dedent("""\
+                "client_key": {
+                    "type": "string",
+                    "default": CHEF_RB_TPL_DEFAULTS["client_key"],
+                    "description": dedent(
+                        """\
                         Optional path for client_cert. default to
-                        ``{}``.""".format(CHEF_RB_TPL_DEFAULTS['client_key']))
+                        ``{}``.""".format(
+                            CHEF_RB_TPL_DEFAULTS["client_key"]
+                        )
+                    ),
                 },
-                'encrypted_data_bag_secret': {
-                    'type': 'string',
-                    'default': None,
-                    'description': dedent("""\
+                "encrypted_data_bag_secret": {
+                    "type": "string",
+                    "default": None,
+                    "description": dedent(
+                        """\
                         Specifies the location of the secret key used by chef
                         to encrypt data items. By default, this path is set
                         to None, meaning that chef will have to look at the
                         path ``{}`` for it.
-                        """.format(CHEF_ENCRYPTED_DATA_BAG_PATH))
+                        """.format(
+                            CHEF_ENCRYPTED_DATA_BAG_PATH
+                        )
+                    ),
                 },
-                'environment': {
-                    'type': 'string',
-                    'default': CHEF_ENVIRONMENT,
-                    'description': dedent("""\
+                "environment": {
+                    "type": "string",
+                    "default": CHEF_ENVIRONMENT,
+                    "description": dedent(
+                        """\
                         Specifies which environment chef will use. By default,
                         it will use the ``{}`` configuration.
-                        """.format(CHEF_ENVIRONMENT))
+                        """.format(
+                            CHEF_ENVIRONMENT
+                        )
+                    ),
                 },
-                'file_backup_path': {
-                    'type': 'string',
-                    'default': CHEF_RB_TPL_DEFAULTS['file_backup_path'],
-                    'description': dedent("""\
+                "file_backup_path": {
+                    "type": "string",
+                    "default": CHEF_RB_TPL_DEFAULTS["file_backup_path"],
+                    "description": dedent(
+                        """\
                         Specifies the location in which backup files are
                         stored. By default, it uses the
                         ``{}`` location.""".format(
-                            CHEF_RB_TPL_DEFAULTS['file_backup_path']))
+                            CHEF_RB_TPL_DEFAULTS["file_backup_path"]
+                        )
+                    ),
                 },
-                'file_cache_path': {
-                    'type': 'string',
-                    'default': CHEF_RB_TPL_DEFAULTS['file_cache_path'],
-                    'description': dedent("""\
+                "file_cache_path": {
+                    "type": "string",
+                    "default": CHEF_RB_TPL_DEFAULTS["file_cache_path"],
+                    "description": dedent(
+                        """\
                         Specifies the location in which chef cache files will
                         be saved. By default, it uses the ``{}``
                         location.""".format(
-                            CHEF_RB_TPL_DEFAULTS['file_cache_path']))
+                            CHEF_RB_TPL_DEFAULTS["file_cache_path"]
+                        )
+                    ),
                 },
-                'json_attribs': {
-                    'type': 'string',
-                    'default': CHEF_FB_PATH,
-                    'description': dedent("""\
+                "json_attribs": {
+                    "type": "string",
+                    "default": CHEF_FB_PATH,
+                    "description": dedent(
+                        """\
                         Specifies the location in which some chef json data is
                         stored. By default, it uses the
-                        ``{}`` location.""".format(CHEF_FB_PATH))
+                        ``{}`` location.""".format(
+                            CHEF_FB_PATH
+                        )
+                    ),
                 },
-                'log_level': {
-                    'type': 'string',
-                    'default': CHEF_RB_TPL_DEFAULTS['log_level'],
-                    'description': dedent("""\
+                "log_level": {
+                    "type": "string",
+                    "default": CHEF_RB_TPL_DEFAULTS["log_level"],
+                    "description": dedent(
+                        """\
                         Defines the level of logging to be stored in the log
                         file. By default this value is set to ``{}``.
-                        """.format(CHEF_RB_TPL_DEFAULTS['log_level']))
+                        """.format(
+                            CHEF_RB_TPL_DEFAULTS["log_level"]
+                        )
+                    ),
                 },
-                'log_location': {
-                    'type': 'string',
-                    'default': CHEF_RB_TPL_DEFAULTS['log_location'],
-                    'description': dedent("""\
+                "log_location": {
+                    "type": "string",
+                    "default": CHEF_RB_TPL_DEFAULTS["log_location"],
+                    "description": dedent(
+                        """\
                         Specifies the location of the chef lof file. By
                         default, the location is specified at
                         ``{}``.""".format(
-                            CHEF_RB_TPL_DEFAULTS['log_location']))
+                            CHEF_RB_TPL_DEFAULTS["log_location"]
+                        )
+                    ),
                 },
-                'node_name': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "node_name": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         The name of the node to run. By default, we will
-                        use th instance id as the node name.""")
+                        use th instance id as the node name."""
+                    ),
                 },
-                'omnibus_url': {
-                    'type': 'string',
-                    'default': OMNIBUS_URL,
-                    'description': dedent("""\
+                "omnibus_url": {
+                    "type": "string",
+                    "default": OMNIBUS_URL,
+                    "description": dedent(
+                        """\
                         Omnibus URL if chef should be installed through
                         Omnibus. By default, it uses the
-                        ``{}``.""".format(OMNIBUS_URL))
+                        ``{}``.""".format(
+                            OMNIBUS_URL
+                        )
+                    ),
                 },
-                'omnibus_url_retries': {
-                    'type': 'integer',
-                    'default': OMNIBUS_URL_RETRIES,
-                    'description': dedent("""\
+                "omnibus_url_retries": {
+                    "type": "integer",
+                    "default": OMNIBUS_URL_RETRIES,
+                    "description": dedent(
+                        """\
                         The number of retries that will be attempted to reach
-                        the Omnibus URL""")
+                        the Omnibus URL"""
+                    ),
                 },
-                'omnibus_version': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "omnibus_version": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         Optional version string to require for omnibus
-                        install.""")
+                        install."""
+                    ),
                 },
-                'pid_file': {
-                    'type': 'string',
-                    'default': CHEF_RB_TPL_DEFAULTS['pid_file'],
-                    'description': dedent("""\
+                "pid_file": {
+                    "type": "string",
+                    "default": CHEF_RB_TPL_DEFAULTS["pid_file"],
+                    "description": dedent(
+                        """\
                         The location in which a process identification
                         number (pid) is saved. By default, it saves
                         in the ``{}`` location.""".format(
-                            CHEF_RB_TPL_DEFAULTS['pid_file']))
+                            CHEF_RB_TPL_DEFAULTS["pid_file"]
+                        )
+                    ),
                 },
-                'server_url': {
-                    'type': 'string',
-                    'description': 'The URL for the chef server'
+                "server_url": {
+                    "type": "string",
+                    "description": "The URL for the chef server",
                 },
-                'show_time': {
-                    'type': 'boolean',
-                    'default': True,
-                    'description': 'Show time in chef logs'
+                "show_time": {
+                    "type": "boolean",
+                    "default": True,
+                    "description": "Show time in chef logs",
                 },
-                'ssl_verify_mode': {
-                    'type': 'string',
-                    'default': CHEF_RB_TPL_DEFAULTS['ssl_verify_mode'],
-                    'description': dedent("""\
+                "ssl_verify_mode": {
+                    "type": "string",
+                    "default": CHEF_RB_TPL_DEFAULTS["ssl_verify_mode"],
+                    "description": dedent(
+                        """\
                         Set the verify mode for HTTPS requests. We can have
                         two possible values for this parameter:
 
@@ -306,67 +370,76 @@ schema = {
                             - ``:verify_peer``: Validate all SSL certificates.
 
                         By default, the parameter is set as ``{}``.
-                        """.format(CHEF_RB_TPL_DEFAULTS['ssl_verify_mode']))
+                        """.format(
+                            CHEF_RB_TPL_DEFAULTS["ssl_verify_mode"]
+                        )
+                    ),
                 },
-                'validation_name': {
-                    'type': 'string',
-                    'description': dedent("""\
+                "validation_name": {
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         The name of the chef-validator key that Chef Infra
                         Client uses to access the Chef Infra Server during
-                        the initial Chef Infra Client run.""")
+                        the initial Chef Infra Client run."""
+                    ),
                 },
-                'force_install': {
-                    'type': 'boolean',
-                    'default': False,
-                    'description': dedent("""\
+                "force_install": {
+                    "type": "boolean",
+                    "default": False,
+                    "description": dedent(
+                        """\
                         If set to ``True``, forces chef installation, even
-                        if it is already installed.""")
+                        if it is already installed."""
+                    ),
                 },
-                'initial_attributes': {
-                    'type': 'object',
-                    'items': {
-                        'type': 'string'
-                    },
-                    'description': dedent("""\
+                "initial_attributes": {
+                    "type": "object",
+                    "items": {"type": "string"},
+                    "description": dedent(
+                        """\
                         Specify a list of initial attributes used by the
-                        cookbooks.""")
+                        cookbooks."""
+                    ),
                 },
-                'install_type': {
-                    'type': 'string',
-                    'default': 'packages',
-                    'description': dedent("""\
+                "install_type": {
+                    "type": "string",
+                    "default": "packages",
+                    "description": dedent(
+                        """\
                         The type of installation for chef. It can be one of
                         the following values:
 
                             - ``packages``
                             - ``gems``
-                            - ``omnibus``""")
+                            - ``omnibus``"""
+                    ),
                 },
-                'run_list': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'string'
-                    },
-                    'description': 'A run list for a first boot json.'
+                "run_list": {
+                    "type": "array",
+                    "items": {"type": "string"},
+                    "description": "A run list for a first boot json.",
                 },
                 "chef_license": {
-                    'type': 'string',
-                    'description': dedent("""\
+                    "type": "string",
+                    "description": dedent(
+                        """\
                         string that indicates if user accepts or not license
-                        related to some of chef products""")
-                }
-            }
+                        related to some of chef products"""
+                    ),
+                },
+            },
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)
 
 
 def post_run_chef(chef_cfg, log):
-    delete_pem = util.get_cfg_option_bool(chef_cfg,
-                                          'delete_validation_post_exec',
-                                          default=False)
+    delete_pem = util.get_cfg_option_bool(
+        chef_cfg, "delete_validation_post_exec", default=False
+    )
     if delete_pem and os.path.isfile(CHEF_VALIDATION_PEM_PATH):
         os.unlink(CHEF_VALIDATION_PEM_PATH)
 
@@ -389,16 +462,20 @@ def get_template_params(iid, chef_cfg, log):
             else:
                 params[k] = util.get_cfg_option_str(chef_cfg, k)
     # These ones are overwritten to be exact values...
-    params.update({
-        'generated_by': util.make_header(),
-        'node_name': util.get_cfg_option_str(chef_cfg, 'node_name',
-                                             default=iid),
-        'environment': util.get_cfg_option_str(chef_cfg, 'environment',
-                                               default='_default'),
-        # These two are mandatory...
-        'server_url': chef_cfg['server_url'],
-        'validation_name': chef_cfg['validation_name'],
-    })
+    params.update(
+        {
+            "generated_by": util.make_header(),
+            "node_name": util.get_cfg_option_str(
+                chef_cfg, "node_name", default=iid
+            ),
+            "environment": util.get_cfg_option_str(
+                chef_cfg, "environment", default="_default"
+            ),
+            # These two are mandatory...
+            "server_url": chef_cfg["server_url"],
+            "validation_name": chef_cfg["validation_name"],
+        }
+    )
     return params
 
 
@@ -406,35 +483,38 @@ def handle(name, cfg, cloud, log, _args):
     """Handler method activated by cloud-init."""
 
     # If there isn't a chef key in the configuration don't do anything
-    if 'chef' not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'chef' key in configuration"), name)
+    if "chef" not in cfg:
+        log.debug(
+            "Skipping module named %s, no 'chef' key in configuration", name
+        )
         return
 
     validate_cloudconfig_schema(cfg, schema)
-    chef_cfg = cfg['chef']
+    chef_cfg = cfg["chef"]
 
     # Ensure the chef directories we use exist
-    chef_dirs = util.get_cfg_option_list(chef_cfg, 'directories')
+    chef_dirs = util.get_cfg_option_list(chef_cfg, "directories")
     if not chef_dirs:
         chef_dirs = list(CHEF_DIRS)
     for d in itertools.chain(chef_dirs, REQUIRED_CHEF_DIRS):
         util.ensure_dir(d)
 
-    vkey_path = chef_cfg.get('validation_key', CHEF_VALIDATION_PEM_PATH)
-    vcert = chef_cfg.get('validation_cert')
+    vkey_path = chef_cfg.get("validation_key", CHEF_VALIDATION_PEM_PATH)
+    vcert = chef_cfg.get("validation_cert")
     # special value 'system' means do not overwrite the file
     # but still render the template to contain 'validation_key'
     if vcert:
         if vcert != "system":
             util.write_file(vkey_path, vcert)
         elif not os.path.isfile(vkey_path):
-            log.warning("chef validation_cert provided as 'system', but "
-                        "validation_key path '%s' does not exist.",
-                        vkey_path)
+            log.warning(
+                "chef validation_cert provided as 'system', but "
+                "validation_key path '%s' does not exist.",
+                vkey_path,
+            )
 
     # Create the chef config from template
-    template_fn = cloud.get_template_filename('chef_client.rb')
+    template_fn = cloud.get_template_filename("chef_client.rb")
     if template_fn:
         iid = str(cloud.datasource.get_instance_id())
         params = get_template_params(iid, chef_cfg, log)
@@ -448,32 +528,33 @@ def handle(name, cfg, cloud, log, _args):
         util.ensure_dirs(param_paths)
         templater.render_to_file(template_fn, CHEF_RB_PATH, params)
     else:
-        log.warning("No template found, not rendering to %s",
-                    CHEF_RB_PATH)
+        log.warning("No template found, not rendering to %s", CHEF_RB_PATH)
 
     # Set the firstboot json
-    fb_filename = util.get_cfg_option_str(chef_cfg, 'firstboot_path',
-                                          default=CHEF_FB_PATH)
+    fb_filename = util.get_cfg_option_str(
+        chef_cfg, "firstboot_path", default=CHEF_FB_PATH
+    )
     if not fb_filename:
         log.info("First boot path empty, not writing first boot json file")
     else:
         initial_json = {}
-        if 'run_list' in chef_cfg:
-            initial_json['run_list'] = chef_cfg['run_list']
-        if 'initial_attributes' in chef_cfg:
-            initial_attributes = chef_cfg['initial_attributes']
+        if "run_list" in chef_cfg:
+            initial_json["run_list"] = chef_cfg["run_list"]
+        if "initial_attributes" in chef_cfg:
+            initial_attributes = chef_cfg["initial_attributes"]
             for k in list(initial_attributes.keys()):
                 initial_json[k] = initial_attributes[k]
         util.write_file(fb_filename, json.dumps(initial_json))
 
     # Try to install chef, if its not already installed...
-    force_install = util.get_cfg_option_bool(chef_cfg,
-                                             'force_install', default=False)
+    force_install = util.get_cfg_option_bool(
+        chef_cfg, "force_install", default=False
+    )
     installed = subp.is_exe(CHEF_EXEC_PATH)
     if not installed or force_install:
         run = install_chef(cloud, chef_cfg, log)
     elif installed:
-        run = util.get_cfg_option_bool(chef_cfg, 'exec', default=False)
+        run = util.get_cfg_option_bool(chef_cfg, "exec", default=False)
     else:
         run = False
     if run:
@@ -482,18 +563,21 @@ def handle(name, cfg, cloud, log, _args):
 
 
 def run_chef(chef_cfg, log):
-    log.debug('Running chef-client')
+    log.debug("Running chef-client")
     cmd = [CHEF_EXEC_PATH]
-    if 'exec_arguments' in chef_cfg:
-        cmd_args = chef_cfg['exec_arguments']
+    if "exec_arguments" in chef_cfg:
+        cmd_args = chef_cfg["exec_arguments"]
         if isinstance(cmd_args, (list, tuple)):
             cmd.extend(cmd_args)
         elif isinstance(cmd_args, str):
             cmd.append(cmd_args)
         else:
-            log.warning("Unknown type %s provided for chef"
-                        " 'exec_arguments' expected list, tuple,"
-                        " or string", type(cmd_args))
+            log.warning(
+                "Unknown type %s provided for chef"
+                " 'exec_arguments' expected list, tuple,"
+                " or string",
+                type(cmd_args),
+            )
             cmd.extend(CHEF_EXEC_DEF_ARGS)
     else:
         cmd.extend(CHEF_EXEC_DEF_ARGS)
@@ -507,16 +591,16 @@ def subp_blob_in_tempfile(blob, *args, **kwargs):
     The 'args' argument to subp will be updated with the full path to the
     filename as the first argument.
     """
-    basename = kwargs.pop('basename', "subp_blob")
+    basename = kwargs.pop("basename", "subp_blob")
 
-    if len(args) == 0 and 'args' not in kwargs:
+    if len(args) == 0 and "args" not in kwargs:
         args = [tuple()]
 
     # Use tmpdir over tmpfile to avoid 'text file busy' on execute
     with temp_utils.tempdir(needs_exe=True) as tmpd:
         tmpf = os.path.join(tmpd, basename)
-        if 'args' in kwargs:
-            kwargs['args'] = [tmpf] + list(kwargs['args'])
+        if "args" in kwargs:
+            kwargs["args"] = [tmpf] + list(kwargs["args"])
         else:
             args = list(args)
             args[0] = [tmpf] + args[0]
@@ -543,36 +627,39 @@ def install_chef_from_omnibus(url=None, retries=None, omnibus_version=None):
     if omnibus_version is None:
         args = []
     else:
-        args = ['-v', omnibus_version]
+        args = ["-v", omnibus_version]
     content = url_helper.readurl(url=url, retries=retries).contents
     return subp_blob_in_tempfile(
-        blob=content, args=args,
-        basename='chef-omnibus-install', capture=False)
+        blob=content, args=args, basename="chef-omnibus-install", capture=False
+    )
 
 
 def install_chef(cloud, chef_cfg, log):
     # If chef is not installed, we install chef based on 'install_type'
-    install_type = util.get_cfg_option_str(chef_cfg, 'install_type',
-                                           'packages')
-    run = util.get_cfg_option_bool(chef_cfg, 'exec', default=False)
+    install_type = util.get_cfg_option_str(
+        chef_cfg, "install_type", "packages"
+    )
+    run = util.get_cfg_option_bool(chef_cfg, "exec", default=False)
     if install_type == "gems":
         # This will install and run the chef-client from gems
-        chef_version = util.get_cfg_option_str(chef_cfg, 'version', None)
-        ruby_version = util.get_cfg_option_str(chef_cfg, 'ruby_version',
-                                               RUBY_VERSION_DEFAULT)
+        chef_version = util.get_cfg_option_str(chef_cfg, "version", None)
+        ruby_version = util.get_cfg_option_str(
+            chef_cfg, "ruby_version", RUBY_VERSION_DEFAULT
+        )
         install_chef_from_gems(ruby_version, chef_version, cloud.distro)
         # Retain backwards compat, by preferring True instead of False
         # when not provided/overriden...
-        run = util.get_cfg_option_bool(chef_cfg, 'exec', default=True)
-    elif install_type == 'packages':
+        run = util.get_cfg_option_bool(chef_cfg, "exec", default=True)
+    elif install_type == "packages":
         # This will install and run the chef-client from packages
-        cloud.distro.install_packages(('chef',))
-    elif install_type == 'omnibus':
+        cloud.distro.install_packages(("chef",))
+    elif install_type == "omnibus":
         omnibus_version = util.get_cfg_option_str(chef_cfg, "omnibus_version")
         install_chef_from_omnibus(
             url=util.get_cfg_option_str(chef_cfg, "omnibus_url"),
             retries=util.get_cfg_option_int(chef_cfg, "omnibus_url_retries"),
-            omnibus_version=omnibus_version)
+            omnibus_version=omnibus_version,
+        )
     else:
         log.warning("Unknown chef install type '%s'", install_type)
         run = False
@@ -581,25 +668,47 @@ def install_chef(cloud, chef_cfg, log):
 
 def get_ruby_packages(version):
     # return a list of packages needed to install ruby at version
-    pkgs = ['ruby%s' % version, 'ruby%s-dev' % version]
+    pkgs = ["ruby%s" % version, "ruby%s-dev" % version]
     if version == "1.8":
-        pkgs.extend(('libopenssl-ruby1.8', 'rubygems1.8'))
+        pkgs.extend(("libopenssl-ruby1.8", "rubygems1.8"))
     return pkgs
 
 
 def install_chef_from_gems(ruby_version, chef_version, distro):
     distro.install_packages(get_ruby_packages(ruby_version))
-    if not os.path.exists('/usr/bin/gem'):
-        util.sym_link('/usr/bin/gem%s' % ruby_version, '/usr/bin/gem')
-    if not os.path.exists('/usr/bin/ruby'):
-        util.sym_link('/usr/bin/ruby%s' % ruby_version, '/usr/bin/ruby')
+    if not os.path.exists("/usr/bin/gem"):
+        util.sym_link("/usr/bin/gem%s" % ruby_version, "/usr/bin/gem")
+    if not os.path.exists("/usr/bin/ruby"):
+        util.sym_link("/usr/bin/ruby%s" % ruby_version, "/usr/bin/ruby")
     if chef_version:
-        subp.subp(['/usr/bin/gem', 'install', 'chef',
-                   '-v %s' % chef_version, '--no-ri',
-                   '--no-rdoc', '--bindir', '/usr/bin', '-q'], capture=False)
+        subp.subp(
+            [
+                "/usr/bin/gem",
+                "install",
+                "chef",
+                "-v %s" % chef_version,
+                "--no-ri",
+                "--no-rdoc",
+                "--bindir",
+                "/usr/bin",
+                "-q",
+            ],
+            capture=False,
+        )
     else:
-        subp.subp(['/usr/bin/gem', 'install', 'chef',
-                   '--no-ri', '--no-rdoc', '--bindir',
-                   '/usr/bin', '-q'], capture=False)
+        subp.subp(
+            [
+                "/usr/bin/gem",
+                "install",
+                "chef",
+                "--no-ri",
+                "--no-rdoc",
+                "--bindir",
+                "/usr/bin",
+                "-q",
+            ],
+            capture=False,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_debug.py b/cloudinit/config/cc_debug.py
index 4d5a6aa2..d09fc129 100644
--- a/cloudinit/config/cc_debug.py
+++ b/cloudinit/config/cc_debug.py
@@ -30,18 +30,16 @@ location that this cloud-init has been configured with when running.
 import copy
 from io import StringIO
 
-from cloudinit import type_utils
-from cloudinit import util
-from cloudinit import safeyaml
+from cloudinit import safeyaml, type_utils, util
 
-SKIP_KEYS = frozenset(['log_cfgs'])
+SKIP_KEYS = frozenset(["log_cfgs"])
 
 
 def _make_header(text):
     header = StringIO()
     header.write("-" * 80)
     header.write("\n")
-    header.write(text.center(80, ' '))
+    header.write(text.center(80, " "))
     header.write("\n")
     header.write("-" * 80)
     header.write("\n")
@@ -56,17 +54,16 @@ def _dumps(obj):
 def handle(name, cfg, cloud, log, args):
     """Handler method activated by cloud-init."""
 
-    verbose = util.get_cfg_by_path(cfg, ('debug', 'verbose'), default=True)
+    verbose = util.get_cfg_by_path(cfg, ("debug", "verbose"), default=True)
     if args:
         # if args are provided (from cmdline) then explicitly set verbose
         out_file = args[0]
         verbose = True
     else:
-        out_file = util.get_cfg_by_path(cfg, ('debug', 'output'))
+        out_file = util.get_cfg_by_path(cfg, ("debug", "output"))
 
     if not verbose:
-        log.debug(("Skipping module named %s,"
-                   " verbose printing disabled"), name)
+        log.debug("Skipping module named %s, verbose printing disabled", name)
         return
     # Clean out some keys that we just don't care about showing...
     dump_cfg = copy.deepcopy(cfg)
@@ -85,8 +82,9 @@ def handle(name, cfg, cloud, log, args):
     to_print.write(_dumps(cloud.datasource.metadata))
     to_print.write("\n")
     to_print.write(_make_header("Misc"))
-    to_print.write("Datasource: %s\n" %
-                   (type_utils.obj_name(cloud.datasource)))
+    to_print.write(
+        "Datasource: %s\n" % (type_utils.obj_name(cloud.datasource))
+    )
     to_print.write("Distro: %s\n" % (type_utils.obj_name(cloud.distro)))
     to_print.write("Hostname: %s\n" % (cloud.get_hostname(True)))
     to_print.write("Instance ID: %s\n" % (cloud.get_instance_id()))
@@ -102,4 +100,5 @@ def handle(name, cfg, cloud, log, args):
     else:
         util.multi_log("".join(content_to_file), console=True, stderr=False)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_disable_ec2_metadata.py b/cloudinit/config/cc_disable_ec2_metadata.py
index 61c769b3..5e528e81 100644
--- a/cloudinit/config/cc_disable_ec2_metadata.py
+++ b/cloudinit/config/cc_disable_ec2_metadata.py
@@ -26,32 +26,35 @@ by default.
     disable_ec2_metadata: <true/false>
 """
 
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import subp, util
 from cloudinit.settings import PER_ALWAYS
 
 frequency = PER_ALWAYS
 
-REJECT_CMD_IF = ['route', 'add', '-host', '169.254.169.254', 'reject']
-REJECT_CMD_IP = ['ip', 'route', 'add', 'prohibit', '169.254.169.254']
+REJECT_CMD_IF = ["route", "add", "-host", "169.254.169.254", "reject"]
+REJECT_CMD_IP = ["ip", "route", "add", "prohibit", "169.254.169.254"]
 
 
 def handle(name, cfg, _cloud, log, _args):
     disabled = util.get_cfg_option_bool(cfg, "disable_ec2_metadata", False)
     if disabled:
         reject_cmd = None
-        if subp.which('ip'):
+        if subp.which("ip"):
             reject_cmd = REJECT_CMD_IP
-        elif subp.which('ifconfig'):
+        elif subp.which("ifconfig"):
             reject_cmd = REJECT_CMD_IF
         else:
-            log.error(('Neither "route" nor "ip" command found, unable to '
-                       'manipulate routing table'))
+            log.error(
+                'Neither "route" nor "ip" command found, unable to '
+                "manipulate routing table"
+            )
             return
         subp.subp(reject_cmd, capture=False)
     else:
-        log.debug(("Skipping module named %s,"
-                   " disabling the ec2 route not enabled"), name)
+        log.debug(
+            "Skipping module named %s, disabling the ec2 route not enabled",
+            name,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_disk_setup.py b/cloudinit/config/cc_disk_setup.py
index 440f05f1..4d527c7a 100644
--- a/cloudinit/config/cc_disk_setup.py
+++ b/cloudinit/config/cc_disk_setup.py
@@ -100,13 +100,13 @@ A label can be specified for the filesystem using
           replace_fs: <filesystem type>
 """
 
-from cloudinit.settings import PER_INSTANCE
-from cloudinit import util
-from cloudinit import subp
 import logging
 import os
 import shlex
 
+from cloudinit import subp, util
+from cloudinit.settings import PER_INSTANCE
+
 frequency = PER_INSTANCE
 
 # Define the commands to use
@@ -118,7 +118,7 @@ BLKDEV_CMD = subp.which("blockdev")
 PARTPROBE_CMD = subp.which("partprobe")
 WIPEFS_CMD = subp.which("wipefs")
 
-LANG_C_ENV = {'LANG': 'C'}
+LANG_C_ENV = {"LANG": "C"}
 
 LOG = logging.getLogger(__name__)
 
@@ -145,9 +145,12 @@ def handle(_name, cfg, cloud, log, _args):
 
             try:
                 log.debug("Creating new partition table/disk")
-                util.log_time(logfunc=LOG.debug,
-                              msg="Creating partition on %s" % disk,
-                              func=mkpart, args=(disk, definition))
+                util.log_time(
+                    logfunc=LOG.debug,
+                    msg="Creating partition on %s" % disk,
+                    func=mkpart,
+                    args=(disk, definition),
+                )
             except Exception as e:
                 util.logexc(LOG, "Failed partitioning operation\n%s" % e)
 
@@ -162,10 +165,13 @@ def handle(_name, cfg, cloud, log, _args):
 
             try:
                 log.debug("Creating new filesystem.")
-                device = definition.get('device')
-                util.log_time(logfunc=LOG.debug,
-                              msg="Creating fs for %s" % device,
-                              func=mkfs, args=(definition,))
+                device = definition.get("device")
+                util.log_time(
+                    logfunc=LOG.debug,
+                    msg="Creating fs for %s" % device,
+                    func=mkfs,
+                    args=(definition,),
+                )
             except Exception as e:
                 util.logexc(LOG, "Failed during filesystem operation\n%s" % e)
 
@@ -178,16 +184,22 @@ def update_disk_setup_devices(disk_setup, tformer):
         if transformed is None or transformed == origname:
             continue
         if transformed in disk_setup:
-            LOG.info("Replacing %s in disk_setup for translation of %s",
-                     origname, transformed)
+            LOG.info(
+                "Replacing %s in disk_setup for translation of %s",
+                origname,
+                transformed,
+            )
             del disk_setup[transformed]
 
         disk_setup[transformed] = disk_setup[origname]
         if isinstance(disk_setup[transformed], dict):
-            disk_setup[transformed]['_origname'] = origname
+            disk_setup[transformed]["_origname"] = origname
         del disk_setup[origname]
-        LOG.debug("updated disk_setup device entry '%s' to '%s'",
-                  origname, transformed)
+        LOG.debug(
+            "updated disk_setup device entry '%s' to '%s'",
+            origname,
+            transformed,
+        )
 
 
 def update_fs_setup_devices(disk_setup, tformer):
@@ -198,7 +210,7 @@ def update_fs_setup_devices(disk_setup, tformer):
             LOG.warning("entry in disk_setup not a dict: %s", definition)
             continue
 
-        origname = definition.get('device')
+        origname = definition.get("device")
 
         if origname is None:
             continue
@@ -208,19 +220,24 @@ def update_fs_setup_devices(disk_setup, tformer):
         tformed = tformer(dev)
         if tformed is not None:
             dev = tformed
-            LOG.debug("%s is mapped to disk=%s part=%s",
-                      origname, tformed, part)
-            definition['_origname'] = origname
-            definition['device'] = tformed
+            LOG.debug(
+                "%s is mapped to disk=%s part=%s", origname, tformed, part
+            )
+            definition["_origname"] = origname
+            definition["device"] = tformed
 
         if part:
             # In origname with <dev>.N, N overrides 'partition' key.
-            if 'partition' in definition:
-                LOG.warning("Partition '%s' from dotted device name '%s' "
-                            "overrides 'partition' key in %s", part, origname,
-                            definition)
-                definition['_partition'] = definition['partition']
-            definition['partition'] = part
+            if "partition" in definition:
+                LOG.warning(
+                    "Partition '%s' from dotted device name '%s' "
+                    "overrides 'partition' key in %s",
+                    part,
+                    origname,
+                    definition,
+                )
+                definition["_partition"] = definition["partition"]
+            definition["partition"] = part
 
 
 def value_splitter(values, start=None):
@@ -232,7 +249,7 @@ def value_splitter(values, start=None):
     if start:
         _values = _values[start:]
 
-    for key, value in [x.split('=') for x in _values]:
+    for key, value in [x.split("=") for x in _values]:
         yield key, value
 
 
@@ -251,11 +268,16 @@ def enumerate_disk(device, nodeps=False):
         name: the device name, i.e. sda
     """
 
-    lsblk_cmd = [LSBLK_CMD, '--pairs', '--output', 'NAME,TYPE,FSTYPE,LABEL',
-                 device]
+    lsblk_cmd = [
+        LSBLK_CMD,
+        "--pairs",
+        "--output",
+        "NAME,TYPE,FSTYPE,LABEL",
+        device,
+    ]
 
     if nodeps:
-        lsblk_cmd.append('--nodeps')
+        lsblk_cmd.append("--nodeps")
 
     info = None
     try:
@@ -269,10 +291,10 @@ def enumerate_disk(device, nodeps=False):
 
     for part in parts:
         d = {
-            'name': None,
-            'type': None,
-            'fstype': None,
-            'label': None,
+            "name": None,
+            "type": None,
+            "fstype": None,
+            "label": None,
         }
 
         for key, value in value_splitter(part):
@@ -303,9 +325,9 @@ def is_device_valid(name, partition=False):
         LOG.warning("Query against device %s failed", name)
         return False
 
-    if partition and d_type == 'part':
+    if partition and d_type == "part":
         return True
-    elif not partition and d_type == 'disk':
+    elif not partition and d_type == "disk":
         return True
     return False
 
@@ -321,7 +343,7 @@ def check_fs(device):
     """
     out, label, fs_type, uuid = None, None, None, None
 
-    blkid_cmd = [BLKID_CMD, '-c', '/dev/null', device]
+    blkid_cmd = [BLKID_CMD, "-c", "/dev/null", device]
     try:
         out, _err = subp.subp(blkid_cmd, rcs=[0, 2])
     except Exception as e:
@@ -332,11 +354,11 @@ def check_fs(device):
     if out:
         if len(out.splitlines()) == 1:
             for key, value in value_splitter(out, start=1):
-                if key.lower() == 'label':
+                if key.lower() == "label":
                     label = value
-                elif key.lower() == 'type':
+                elif key.lower() == "type":
                     fs_type = value
-                elif key.lower() == 'uuid':
+                elif key.lower() == "uuid":
                     uuid = value
 
     return label, fs_type, uuid
@@ -350,8 +372,14 @@ def is_filesystem(device):
     return fs_type
 
 
-def find_device_node(device, fs_type=None, label=None, valid_targets=None,
-                     label_match=True, replace_fs=None):
+def find_device_node(
+    device,
+    fs_type=None,
+    label=None,
+    valid_targets=None,
+    label_match=True,
+    replace_fs=None,
+):
     """
     Find a device that is either matches the spec, or the first
 
@@ -366,31 +394,32 @@ def find_device_node(device, fs_type=None, label=None, valid_targets=None,
         label = ""
 
     if not valid_targets:
-        valid_targets = ['disk', 'part']
+        valid_targets = ["disk", "part"]
 
     raw_device_used = False
     for d in enumerate_disk(device):
 
-        if d['fstype'] == replace_fs and label_match is False:
+        if d["fstype"] == replace_fs and label_match is False:
             # We found a device where we want to replace the FS
-            return ('/dev/%s' % d['name'], False)
+            return ("/dev/%s" % d["name"], False)
 
-        if (d['fstype'] == fs_type and
-                ((label_match and d['label'] == label) or not label_match)):
+        if d["fstype"] == fs_type and (
+            (label_match and d["label"] == label) or not label_match
+        ):
             # If we find a matching device, we return that
-            return ('/dev/%s' % d['name'], True)
+            return ("/dev/%s" % d["name"], True)
 
-        if d['type'] in valid_targets:
+        if d["type"] in valid_targets:
 
-            if d['type'] != 'disk' or d['fstype']:
+            if d["type"] != "disk" or d["fstype"]:
                 raw_device_used = True
 
-            if d['type'] == 'disk':
+            if d["type"] == "disk":
                 # Skip the raw disk, its the default
                 pass
 
-            elif not d['fstype']:
-                return ('/dev/%s' % d['name'], False)
+            elif not d["fstype"]:
+                return ("/dev/%s" % d["name"], False)
 
     if not raw_device_used:
         return (device, False)
@@ -433,7 +462,7 @@ def get_dyn_func(*args):
     if len(args) < 2:
         raise Exception("Unable to determine dynamic funcation name")
 
-    func_name = (args[0] % args[1])
+    func_name = args[0] % args[1]
     func_args = args[2:]
 
     try:
@@ -448,8 +477,8 @@ def get_dyn_func(*args):
 
 def get_hdd_size(device):
     try:
-        size_in_bytes, _ = subp.subp([BLKDEV_CMD, '--getsize64', device])
-        sector_size, _ = subp.subp([BLKDEV_CMD, '--getss', device])
+        size_in_bytes, _ = subp.subp([BLKDEV_CMD, "--getsize64", device])
+        sector_size, _ = subp.subp([BLKDEV_CMD, "--getss", device])
     except Exception as e:
         raise Exception("Failed to get %s size\n%s" % (device, e)) from e
 
@@ -481,13 +510,13 @@ def check_partition_mbr_layout(device, layout):
 
         if device in _line[0]:
             # We don't understand extended partitions yet
-            if _line[-1].lower() in ['extended', 'empty']:
+            if _line[-1].lower() in ["extended", "empty"]:
                 continue
 
             # Find the partition types
             type_label = None
             for x in sorted(range(1, len(_line)), reverse=True):
-                if _line[x].isdigit() and _line[x] != '/':
+                if _line[x].isdigit() and _line[x] != "/":
                     type_label = _line[x]
                     break
 
@@ -496,7 +525,7 @@ def check_partition_mbr_layout(device, layout):
 
 
 def check_partition_gpt_layout(device, layout):
-    prt_cmd = [SGDISK_CMD, '-p', device]
+    prt_cmd = [SGDISK_CMD, "-p", device]
     try:
         out, _err = subp.subp(prt_cmd, update_env=LANG_C_ENV)
     except Exception as e:
@@ -522,7 +551,7 @@ def check_partition_gpt_layout(device, layout):
     # Number Start (sector) End (sector) Size       Code  Name
     # 1      2048           206847       100.0 MiB  0700  Microsoft basic data
     for line in out_lines:
-        if line.strip().startswith('Number'):
+        if line.strip().startswith("Number"):
             break
 
     codes = [line.strip().split()[5] for line in out_lines]
@@ -545,10 +574,16 @@ def check_partition_layout(table_type, device, layout):
     function called check_partition_%s_layout
     """
     found_layout = get_dyn_func(
-        "check_partition_%s_layout", table_type, device, layout)
-
-    LOG.debug("called check_partition_%s_layout(%s, %s), returned: %s",
-              table_type, device, layout, found_layout)
+        "check_partition_%s_layout", table_type, device, layout
+    )
+
+    LOG.debug(
+        "called check_partition_%s_layout(%s, %s), returned: %s",
+        table_type,
+        device,
+        layout,
+        found_layout,
+    )
     if isinstance(layout, bool):
         # if we are using auto partitioning, or "True" be happy
         # if a single partition exists.
@@ -559,10 +594,12 @@ def check_partition_layout(table_type, device, layout):
     elif len(found_layout) == len(layout):
         # This just makes sure that the number of requested
         # partitions and the type labels are right
-        layout_types = [str(x[1]) if isinstance(x, (tuple, list)) else None
-                        for x in layout]
-        LOG.debug("Layout types=%s. Found types=%s",
-                  layout_types, found_layout)
+        layout_types = [
+            str(x[1]) if isinstance(x, (tuple, list)) else None for x in layout
+        ]
+        LOG.debug(
+            "Layout types=%s. Found types=%s", layout_types, found_layout
+        )
         for itype, ftype in zip(layout_types, found_layout):
             if itype is not None and str(ftype) != str(itype):
                 return False
@@ -588,8 +625,9 @@ def get_partition_mbr_layout(size, layout):
         # Create a single partition
         return "0,"
 
-    if ((len(layout) == 0 and isinstance(layout, list)) or
-            not isinstance(layout, list)):
+    if (len(layout) == 0 and isinstance(layout, list)) or not isinstance(
+        layout, list
+    ):
         raise Exception("Partition layout is invalid")
 
     last_part_num = len(layout)
@@ -617,8 +655,10 @@ def get_partition_mbr_layout(size, layout):
 
     sfdisk_definition = "\n".join(part_definition)
     if len(part_definition) > 4:
-        raise Exception("Calculated partition definition is too big\n%s" %
-                        sfdisk_definition)
+        raise Exception(
+            "Calculated partition definition is too big\n%s"
+            % sfdisk_definition
+        )
 
     return sfdisk_definition
 
@@ -632,14 +672,15 @@ def get_partition_gpt_layout(size, layout):
         if isinstance(partition, list):
             if len(partition) != 2:
                 raise Exception(
-                    "Partition was incorrectly defined: %s" % partition)
+                    "Partition was incorrectly defined: %s" % partition
+                )
             percent, partition_type = partition
         else:
             percent = partition
             partition_type = None
 
         part_size = int(float(size) * (float(percent) / 100))
-        partition_specs.append((partition_type, [0, '+{}'.format(part_size)]))
+        partition_specs.append((partition_type, [0, "+{}".format(part_size)]))
 
     # The last partition should use up all remaining space
     partition_specs[-1][-1][-1] = 0
@@ -649,7 +690,7 @@ def get_partition_gpt_layout(size, layout):
 def purge_disk_ptable(device):
     # wipe the first and last megabyte of a disk (or file)
     # gpt stores partition table both at front and at end.
-    null = '\0'
+    null = "\0"
     start_len = 1024 * 1024
     end_len = 1024 * 1024
     with open(device, "rb+") as fp:
@@ -668,14 +709,14 @@ def purge_disk(device):
 
     # wipe any file systems first
     for d in enumerate_disk(device):
-        if d['type'] not in ["disk", "crypt"]:
-            wipefs_cmd = [WIPEFS_CMD, "--all", "/dev/%s" % d['name']]
+        if d["type"] not in ["disk", "crypt"]:
+            wipefs_cmd = [WIPEFS_CMD, "--all", "/dev/%s" % d["name"]]
             try:
-                LOG.info("Purging filesystem on /dev/%s", d['name'])
+                LOG.info("Purging filesystem on /dev/%s", d["name"])
                 subp.subp(wipefs_cmd)
             except Exception as e:
                 raise Exception(
-                    "Failed FS purge of /dev/%s" % d['name']
+                    "Failed FS purge of /dev/%s" % d["name"]
                 ) from e
 
     purge_disk_ptable(device)
@@ -701,7 +742,7 @@ def read_parttbl(device):
     if PARTPROBE_CMD is not None:
         probe_cmd = [PARTPROBE_CMD, device]
     else:
-        probe_cmd = [BLKDEV_CMD, '--rereadpt', device]
+        probe_cmd = [BLKDEV_CMD, "--rereadpt", device]
     util.udevadm_settle()
     try:
         subp.subp(probe_cmd)
@@ -730,17 +771,24 @@ def exec_mkpart_mbr(device, layout):
 
 def exec_mkpart_gpt(device, layout):
     try:
-        subp.subp([SGDISK_CMD, '-Z', device])
+        subp.subp([SGDISK_CMD, "-Z", device])
         for index, (partition_type, (start, end)) in enumerate(layout):
             index += 1
-            subp.subp([SGDISK_CMD,
-                       '-n', '{}:{}:{}'.format(index, start, end), device])
+            subp.subp(
+                [
+                    SGDISK_CMD,
+                    "-n",
+                    "{}:{}:{}".format(index, start, end),
+                    device,
+                ]
+            )
             if partition_type is not None:
                 # convert to a 4 char (or more) string right padded with 0
                 # 82 -> 8200.  'Linux' -> 'Linux'
                 pinput = str(partition_type).ljust(4, "0")
                 subp.subp(
-                    [SGDISK_CMD, '-t', '{}:{}'.format(index, pinput), device])
+                    [SGDISK_CMD, "-t", "{}:{}".format(index, pinput), device]
+                )
     except Exception:
         LOG.warning("Failed to partition device %s", device)
         raise
@@ -766,8 +814,10 @@ def assert_and_settle_device(device):
     if not os.path.exists(device):
         util.udevadm_settle()
         if not os.path.exists(device):
-            raise RuntimeError("Device %s did not exist and was not created "
-                               "with a udevadm settle." % device)
+            raise RuntimeError(
+                "Device %s did not exist and was not created "
+                "with a udevadm settle." % device
+            )
 
     # Whether or not the device existed above, it is possible that udev
     # events that would populate udev database (for reading by lsdname) have
@@ -794,9 +844,9 @@ def mkpart(device, definition):
     device = os.path.realpath(device)
 
     LOG.debug("Checking values for %s definition", device)
-    overwrite = definition.get('overwrite', False)
-    layout = definition.get('layout', False)
-    table_type = definition.get('table_type', 'mbr')
+    overwrite = definition.get("overwrite", False)
+    layout = definition.get("layout", False)
+    table_type = definition.get("table_type", "mbr")
 
     # Check if the default device is a partition or not
     LOG.debug("Checking against default devices")
@@ -809,7 +859,8 @@ def mkpart(device, definition):
     LOG.debug("Checking if device %s is a valid device", device)
     if not is_device_valid(device):
         raise Exception(
-            'Device {device} is not a disk device!'.format(device=device))
+            "Device {device} is not a disk device!".format(device=device)
+        )
 
     # Remove the partition table entries
     if isinstance(layout, str) and layout.lower() == "remove":
@@ -845,21 +896,21 @@ def lookup_force_flag(fs):
     A force flag might be -F or -F, this look it up
     """
     flags = {
-        'ext': '-F',
-        'btrfs': '-f',
-        'xfs': '-f',
-        'reiserfs': '-f',
-        'swap': '-f',
+        "ext": "-F",
+        "btrfs": "-f",
+        "xfs": "-f",
+        "reiserfs": "-f",
+        "swap": "-f",
     }
 
-    if 'ext' in fs.lower():
-        fs = 'ext'
+    if "ext" in fs.lower():
+        fs = "ext"
 
     if fs.lower() in flags:
         return flags[fs]
 
     LOG.warning("Force flag for %s is unknown.", fs)
-    return ''
+    return ""
 
 
 def mkfs(fs_cfg):
@@ -883,14 +934,14 @@ def mkfs(fs_cfg):
 
             When 'cmd' is provided then no other parameter is required.
     """
-    label = fs_cfg.get('label')
-    device = fs_cfg.get('device')
-    partition = str(fs_cfg.get('partition', 'any'))
-    fs_type = fs_cfg.get('filesystem')
-    fs_cmd = fs_cfg.get('cmd', [])
-    fs_opts = fs_cfg.get('extra_opts', [])
-    fs_replace = fs_cfg.get('replace_fs', False)
-    overwrite = fs_cfg.get('overwrite', False)
+    label = fs_cfg.get("label")
+    device = fs_cfg.get("device")
+    partition = str(fs_cfg.get("partition", "any"))
+    fs_type = fs_cfg.get("filesystem")
+    fs_cmd = fs_cfg.get("cmd", [])
+    fs_opts = fs_cfg.get("extra_opts", [])
+    fs_replace = fs_cfg.get("replace_fs", False)
+    overwrite = fs_cfg.get("overwrite", False)
 
     # ensure that we get a real device rather than a symbolic link
     assert_and_settle_device(device)
@@ -903,14 +954,19 @@ def mkfs(fs_cfg):
         # Handle manual definition of partition
         if partition.isdigit():
             device = "%s%s" % (device, partition)
-            LOG.debug("Manual request of partition %s for %s",
-                      partition, device)
+            LOG.debug(
+                "Manual request of partition %s for %s", partition, device
+            )
 
         # Check to see if the fs already exists
         LOG.debug("Checking device %s", device)
         check_label, check_fstype, _ = check_fs(device)
-        LOG.debug("Device '%s' has check_label='%s' check_fstype=%s",
-                  device, check_label, check_fstype)
+        LOG.debug(
+            "Device '%s' has check_label='%s' check_fstype=%s",
+            device,
+            check_label,
+            check_fstype,
+        )
 
         if check_label == label and check_fstype == fs_type:
             LOG.debug("Existing file system found at %s", device)
@@ -924,19 +980,23 @@ def mkfs(fs_cfg):
         else:
             LOG.debug("Device %s is cleared for formating", device)
 
-    elif partition and str(partition).lower() in ('auto', 'any'):
+    elif partition and str(partition).lower() in ("auto", "any"):
         # For auto devices, we match if the filesystem does exist
         odevice = device
         LOG.debug("Identifying device to create %s filesytem on", label)
 
         # any mean pick the first match on the device with matching fs_type
         label_match = True
-        if partition.lower() == 'any':
+        if partition.lower() == "any":
             label_match = False
 
-        device, reuse = find_device_node(device, fs_type=fs_type, label=label,
-                                         label_match=label_match,
-                                         replace_fs=fs_replace)
+        device, reuse = find_device_node(
+            device,
+            fs_type=fs_type,
+            label=label,
+            label_match=label_match,
+            replace_fs=fs_replace,
+        )
         LOG.debug("Automatic device for %s identified as %s", odevice, device)
 
         if reuse:
@@ -947,18 +1007,25 @@ def mkfs(fs_cfg):
             LOG.debug("Replacing file system on %s as instructed.", device)
 
         if not device:
-            LOG.debug("No device aviable that matches request. "
-                      "Skipping fs creation for %s", fs_cfg)
+            LOG.debug(
+                "No device aviable that matches request. "
+                "Skipping fs creation for %s",
+                fs_cfg,
+            )
             return
-    elif not partition or str(partition).lower() == 'none':
+    elif not partition or str(partition).lower() == "none":
         LOG.debug("Using the raw device to place filesystem %s on", label)
 
     else:
         LOG.debug("Error in device identification handling.")
         return
 
-    LOG.debug("File system type '%s' with label '%s' will be created on %s",
-              fs_type, label, device)
+    LOG.debug(
+        "File system type '%s' with label '%s' will be created on %s",
+        fs_type,
+        label,
+        device,
+    )
 
     # Make sure the device is defined
     if not device:
@@ -969,26 +1036,29 @@ def mkfs(fs_cfg):
     if not (fs_type or fs_cmd):
         raise Exception(
             "No way to create filesystem '{label}'. fs_type or fs_cmd "
-            "must be set.".format(label=label))
+            "must be set.".format(label=label)
+        )
 
     # Create the commands
     shell = False
     if fs_cmd:
-        fs_cmd = fs_cfg['cmd'] % {
-            'label': label,
-            'filesystem': fs_type,
-            'device': device,
+        fs_cmd = fs_cfg["cmd"] % {
+            "label": label,
+            "filesystem": fs_type,
+            "device": device,
         }
         shell = True
 
         if overwrite:
             LOG.warning(
                 "fs_setup:overwrite ignored because cmd was specified: %s",
-                fs_cmd)
+                fs_cmd,
+            )
         if fs_opts:
             LOG.warning(
                 "fs_setup:extra_opts ignored because cmd was specified: %s",
-                fs_cmd)
+                fs_cmd,
+            )
     else:
         # Find the mkfs command
         mkfs_cmd = subp.which("mkfs.%s" % fs_type)
@@ -996,8 +1066,11 @@ def mkfs(fs_cfg):
             mkfs_cmd = subp.which("mk%s" % fs_type)
 
         if not mkfs_cmd:
-            LOG.warning("Cannot create fstype '%s'.  No mkfs.%s command",
-                        fs_type, fs_type)
+            LOG.warning(
+                "Cannot create fstype '%s'.  No mkfs.%s command",
+                fs_type,
+                fs_type,
+            )
             return
 
         fs_cmd = [mkfs_cmd, device]
@@ -1022,4 +1095,5 @@ def mkfs(fs_cfg):
     except Exception as e:
         raise Exception("Failed to exec of '%s':\n%s" % (fs_cmd, e)) from e
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_emit_upstart.py b/cloudinit/config/cc_emit_upstart.py
index 40eee052..a928082b 100644
--- a/cloudinit/config/cc_emit_upstart.py
+++ b/cloudinit/config/cc_emit_upstart.py
@@ -24,12 +24,12 @@ user configuration should be required.
 import os
 
 from cloudinit import log as logging
-from cloudinit.settings import PER_ALWAYS
 from cloudinit import subp
+from cloudinit.settings import PER_ALWAYS
 
 frequency = PER_ALWAYS
 
-distros = ['ubuntu', 'debian']
+distros = ["ubuntu", "debian"]
 LOG = logging.getLogger(__name__)
 
 
@@ -39,15 +39,18 @@ def is_upstart_system():
         return False
 
     myenv = os.environ.copy()
-    if 'UPSTART_SESSION' in myenv:
-        del myenv['UPSTART_SESSION']
-    check_cmd = ['initctl', 'version']
+    if "UPSTART_SESSION" in myenv:
+        del myenv["UPSTART_SESSION"]
+    check_cmd = ["initctl", "version"]
     try:
         (out, _err) = subp.subp(check_cmd, env=myenv)
-        return 'upstart' in out
+        return "upstart" in out
     except subp.ProcessExecutionError as e:
-        LOG.debug("'%s' returned '%s', not using upstart",
-                  ' '.join(check_cmd), e.exit_code)
+        LOG.debug(
+            "'%s' returned '%s', not using upstart",
+            " ".join(check_cmd),
+            e.exit_code,
+        )
     return False
 
 
@@ -56,7 +59,7 @@ def handle(name, _cfg, cloud, log, args):
     if not event_names:
         # Default to the 'cloud-config'
         # event for backwards compat.
-        event_names = ['cloud-config']
+        event_names = ["cloud-config"]
 
     if not is_upstart_system():
         log.debug("not upstart system, '%s' disabled", name)
@@ -64,11 +67,12 @@ def handle(name, _cfg, cloud, log, args):
 
     cfgpath = cloud.paths.get_ipath_cur("cloud_config")
     for n in event_names:
-        cmd = ['initctl', 'emit', str(n), 'CLOUD_CFG=%s' % cfgpath]
+        cmd = ["initctl", "emit", str(n), "CLOUD_CFG=%s" % cfgpath]
         try:
             subp.subp(cmd)
         except Exception as e:
             # TODO(harlowja), use log exception from utils??
             log.warning("Emission of upstart event %s failed due to: %s", n, e)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_fan.py b/cloudinit/config/cc_fan.py
index 91f50e22..50a81744 100644
--- a/cloudinit/config/cc_fan.py
+++ b/cloudinit/config/cc_fan.py
@@ -38,60 +38,62 @@ If cloud-init sees a ``fan`` entry in cloud-config it will:
 """
 
 from cloudinit import log as logging
+from cloudinit import subp, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import subp
-from cloudinit import util
 
 LOG = logging.getLogger(__name__)
 
 frequency = PER_INSTANCE
 
 BUILTIN_CFG = {
-    'config': None,
-    'config_path': '/etc/network/fan',
+    "config": None,
+    "config_path": "/etc/network/fan",
 }
 
 
 def stop_update_start(distro, service, config_file, content):
     try:
-        distro.manage_service('stop', service)
+        distro.manage_service("stop", service)
         stop_failed = False
     except subp.ProcessExecutionError as e:
         stop_failed = True
         LOG.warning("failed to stop %s: %s", service, e)
 
-    if not content.endswith('\n'):
-        content += '\n'
+    if not content.endswith("\n"):
+        content += "\n"
     util.write_file(config_file, content, omode="w")
 
     try:
-        distro.manage_service('start', service)
+        distro.manage_service("start", service)
         if stop_failed:
             LOG.warning("success: %s started", service)
     except subp.ProcessExecutionError as e:
         LOG.warning("failed to start %s: %s", service, e)
 
-    distro.manage_service('enable', service)
+    distro.manage_service("enable", service)
 
 
 def handle(name, cfg, cloud, log, args):
-    cfgin = cfg.get('fan')
+    cfgin = cfg.get("fan")
     if not cfgin:
         cfgin = {}
     mycfg = util.mergemanydict([cfgin, BUILTIN_CFG])
 
-    if not mycfg.get('config'):
+    if not mycfg.get("config"):
         LOG.debug("%s: no 'fan' config entry. disabling", name)
         return
 
-    util.write_file(mycfg.get('config_path'), mycfg.get('config'), omode="w")
+    util.write_file(mycfg.get("config_path"), mycfg.get("config"), omode="w")
     distro = cloud.distro
-    if not subp.which('fanctl'):
-        distro.install_packages(['ubuntu-fan'])
+    if not subp.which("fanctl"):
+        distro.install_packages(["ubuntu-fan"])
 
     stop_update_start(
         distro,
-        service='ubuntu-fan', config_file=mycfg.get('config_path'),
-        content=mycfg.get('config'))
+        service="ubuntu-fan",
+        config_file=mycfg.get("config_path"),
+        content=mycfg.get("config"),
+    )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_final_message.py b/cloudinit/config/cc_final_message.py
index 4fa5297e..f443ccd8 100644
--- a/cloudinit/config/cc_final_message.py
+++ b/cloudinit/config/cc_final_message.py
@@ -31,10 +31,7 @@ specified as a jinja template with the following variables set:
 
 """
 
-from cloudinit import templater
-from cloudinit import util
-from cloudinit import version
-
+from cloudinit import templater, util, version
 from cloudinit.settings import PER_ALWAYS
 
 frequency = PER_ALWAYS
@@ -49,7 +46,7 @@ FINAL_MESSAGE_DEF = (
 
 def handle(_name, cfg, cloud, log, args):
 
-    msg_in = ''
+    msg_in = ""
     if len(args) != 0:
         msg_in = str(args[0])
     else:
@@ -64,14 +61,18 @@ def handle(_name, cfg, cloud, log, args):
     cver = version.version_string()
     try:
         subs = {
-            'uptime': uptime,
-            'timestamp': ts,
-            'version': cver,
-            'datasource': str(cloud.datasource),
+            "uptime": uptime,
+            "timestamp": ts,
+            "version": cver,
+            "datasource": str(cloud.datasource),
         }
         subs.update(dict([(k.upper(), v) for k, v in subs.items()]))
-        util.multi_log("%s\n" % (templater.render_string(msg_in, subs)),
-                       console=False, stderr=True, log=log)
+        util.multi_log(
+            "%s\n" % (templater.render_string(msg_in, subs)),
+            console=False,
+            stderr=True,
+            log=log,
+        )
     except Exception:
         util.logexc(log, "Failed to render final message template")
 
@@ -85,4 +86,5 @@ def handle(_name, cfg, cloud, log, args):
     if cloud.datasource.is_disconnected:
         log.warning("Used fallback datasource")
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_foo.py b/cloudinit/config/cc_foo.py
index 924b967c..3c307153 100644
--- a/cloudinit/config/cc_foo.py
+++ b/cloudinit/config/cc_foo.py
@@ -53,4 +53,5 @@ frequency = PER_INSTANCE
 def handle(name, _cfg, _cloud, log, _args):
     log.debug("Hi from module %s", name)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_growpart.py b/cloudinit/config/cc_growpart.py
index 1ddc9dc7..43334caa 100644
--- a/cloudinit/config/cc_growpart.py
+++ b/cloudinit/config/cc_growpart.py
@@ -70,17 +70,15 @@ import re
 import stat
 
 from cloudinit import log as logging
+from cloudinit import subp, temp_utils, util
 from cloudinit.settings import PER_ALWAYS
-from cloudinit import subp
-from cloudinit import temp_utils
-from cloudinit import util
 
 frequency = PER_ALWAYS
 
 DEFAULT_CONFIG = {
-    'mode': 'auto',
-    'devices': ['/'],
-    'ignore_growroot_disabled': False,
+    "mode": "auto",
+    "devices": ["/"],
+    "ignore_growroot_disabled": False,
 }
 
 
@@ -131,7 +129,7 @@ class ResizeFailedException(Exception):
 class ResizeGrowPart(object):
     def available(self):
         myenv = os.environ.copy()
-        myenv['LANG'] = 'C'
+        myenv["LANG"] = "C"
 
         try:
             (out, _err) = subp.subp(["growpart", "--help"], env=myenv)
@@ -144,7 +142,7 @@ class ResizeGrowPart(object):
 
     def resize(self, diskdev, partnum, partdev):
         myenv = os.environ.copy()
-        myenv['LANG'] = 'C'
+        myenv["LANG"] = "C"
         before = get_size(partdev)
 
         # growpart uses tmp dir to store intermediate states
@@ -153,14 +151,19 @@ class ResizeGrowPart(object):
             growpart_tmp = os.path.join(tmpd, "growpart")
             if not os.path.exists(growpart_tmp):
                 os.mkdir(growpart_tmp, 0o700)
-            myenv['TMPDIR'] = growpart_tmp
+            myenv["TMPDIR"] = growpart_tmp
             try:
-                subp.subp(["growpart", '--dry-run', diskdev, partnum],
-                          env=myenv)
+                subp.subp(
+                    ["growpart", "--dry-run", diskdev, partnum], env=myenv
+                )
             except subp.ProcessExecutionError as e:
                 if e.exit_code != 1:
-                    util.logexc(LOG, "Failed growpart --dry-run for (%s, %s)",
-                                diskdev, partnum)
+                    util.logexc(
+                        LOG,
+                        "Failed growpart --dry-run for (%s, %s)",
+                        diskdev,
+                        partnum,
+                    )
                     raise ResizeFailedException(e) from e
                 return (before, before)
 
@@ -176,7 +179,7 @@ class ResizeGrowPart(object):
 class ResizeGpart(object):
     def available(self):
         myenv = os.environ.copy()
-        myenv['LANG'] = 'C'
+        myenv["LANG"] = "C"
 
         try:
             (_out, err) = subp.subp(["gpart", "help"], env=myenv, rcs=[0, 1])
@@ -234,11 +237,11 @@ def device_part_info(devpath):
     # the device, like /dev/vtbd0p2.
     if util.is_FreeBSD():
         freebsd_part = "/dev/" + util.find_freebsd_part(devpath)
-        m = re.search('^(/dev/.+)p([0-9])$', freebsd_part)
+        m = re.search("^(/dev/.+)p([0-9])$", freebsd_part)
         return (m.group(1), m.group(2))
     elif util.is_DragonFlyBSD():
         dragonflybsd_part = "/dev/" + util.find_dragonflybsd_part(devpath)
-        m = re.search('^(/dev/.+)s([0-9])$', dragonflybsd_part)
+        m = re.search("^(/dev/.+)s([0-9])$", dragonflybsd_part)
         return (m.group(1), m.group(2))
 
     if not os.path.exists(syspath):
@@ -275,7 +278,7 @@ def devent2dev(devent):
     container = util.is_container()
 
     # Ensure the path is a block device.
-    if (dev == "/dev/root" and not container):
+    if dev == "/dev/root" and not container:
         dev = util.rootdev_from_cmdline(util.get_cmdline())
         if dev is None:
             if os.path.exists(dev):
@@ -293,65 +296,102 @@ def resize_devices(resizer, devices):
         try:
             blockdev = devent2dev(devent)
         except ValueError as e:
-            info.append((devent, RESIZE.SKIPPED,
-                         "unable to convert to device: %s" % e,))
+            info.append(
+                (
+                    devent,
+                    RESIZE.SKIPPED,
+                    "unable to convert to device: %s" % e,
+                )
+            )
             continue
 
         try:
             statret = os.stat(blockdev)
         except OSError as e:
-            info.append((devent, RESIZE.SKIPPED,
-                         "stat of '%s' failed: %s" % (blockdev, e),))
+            info.append(
+                (
+                    devent,
+                    RESIZE.SKIPPED,
+                    "stat of '%s' failed: %s" % (blockdev, e),
+                )
+            )
             continue
 
-        if (not stat.S_ISBLK(statret.st_mode) and
-                not stat.S_ISCHR(statret.st_mode)):
-            info.append((devent, RESIZE.SKIPPED,
-                         "device '%s' not a block device" % blockdev,))
+        if not stat.S_ISBLK(statret.st_mode) and not stat.S_ISCHR(
+            statret.st_mode
+        ):
+            info.append(
+                (
+                    devent,
+                    RESIZE.SKIPPED,
+                    "device '%s' not a block device" % blockdev,
+                )
+            )
             continue
 
         try:
             (disk, ptnum) = device_part_info(blockdev)
         except (TypeError, ValueError) as e:
-            info.append((devent, RESIZE.SKIPPED,
-                         "device_part_info(%s) failed: %s" % (blockdev, e),))
+            info.append(
+                (
+                    devent,
+                    RESIZE.SKIPPED,
+                    "device_part_info(%s) failed: %s" % (blockdev, e),
+                )
+            )
             continue
 
         try:
             (old, new) = resizer.resize(disk, ptnum, blockdev)
             if old == new:
-                info.append((devent, RESIZE.NOCHANGE,
-                             "no change necessary (%s, %s)" % (disk, ptnum),))
+                info.append(
+                    (
+                        devent,
+                        RESIZE.NOCHANGE,
+                        "no change necessary (%s, %s)" % (disk, ptnum),
+                    )
+                )
             else:
-                info.append((devent, RESIZE.CHANGED,
-                             "changed (%s, %s) from %s to %s" %
-                             (disk, ptnum, old, new),))
+                info.append(
+                    (
+                        devent,
+                        RESIZE.CHANGED,
+                        "changed (%s, %s) from %s to %s"
+                        % (disk, ptnum, old, new),
+                    )
+                )
 
         except ResizeFailedException as e:
-            info.append((devent, RESIZE.FAILED,
-                         "failed to resize: disk=%s, ptnum=%s: %s" %
-                         (disk, ptnum, e),))
+            info.append(
+                (
+                    devent,
+                    RESIZE.FAILED,
+                    "failed to resize: disk=%s, ptnum=%s: %s"
+                    % (disk, ptnum, e),
+                )
+            )
 
     return info
 
 
 def handle(_name, cfg, _cloud, log, _args):
-    if 'growpart' not in cfg:
-        log.debug("No 'growpart' entry in cfg.  Using default: %s" %
-                  DEFAULT_CONFIG)
-        cfg['growpart'] = DEFAULT_CONFIG
+    if "growpart" not in cfg:
+        log.debug(
+            "No 'growpart' entry in cfg.  Using default: %s" % DEFAULT_CONFIG
+        )
+        cfg["growpart"] = DEFAULT_CONFIG
 
-    mycfg = cfg.get('growpart')
+    mycfg = cfg.get("growpart")
     if not isinstance(mycfg, dict):
         log.warning("'growpart' in config was not a dict")
         return
 
-    mode = mycfg.get('mode', "auto")
+    mode = mycfg.get("mode", "auto")
     if util.is_false(mode):
         log.debug("growpart disabled: mode=%s" % mode)
         return
 
-    if util.is_false(mycfg.get('ignore_growroot_disabled', False)):
+    if util.is_false(mycfg.get("ignore_growroot_disabled", False)):
         if os.path.isfile("/etc/growroot-disabled"):
             log.debug("growpart disabled: /etc/growroot-disabled exists")
             log.debug("use ignore_growroot_disabled to ignore")
@@ -370,8 +410,12 @@ def handle(_name, cfg, _cloud, log, _args):
             raise e
         return
 
-    resized = util.log_time(logfunc=log.debug, msg="resize_devices",
-                            func=resize_devices, args=(resizer, devices))
+    resized = util.log_time(
+        logfunc=log.debug,
+        msg="resize_devices",
+        func=resize_devices,
+        args=(resizer, devices),
+    )
     for (entry, action, msg) in resized:
         if action == RESIZE.CHANGED:
             log.info("'%s' resized: %s" % (entry, msg))
@@ -379,6 +423,6 @@ def handle(_name, cfg, _cloud, log, _args):
             log.debug("'%s' %s: %s" % (entry, action, msg))
 
 
-RESIZERS = (('growpart', ResizeGrowPart), ('gpart', ResizeGpart))
+RESIZERS = (("growpart", ResizeGrowPart), ("gpart", ResizeGpart))
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_grub_dpkg.py b/cloudinit/config/cc_grub_dpkg.py
index eb03c664..ad7243d9 100644
--- a/cloudinit/config/cc_grub_dpkg.py
+++ b/cloudinit/config/cc_grub_dpkg.py
@@ -43,11 +43,10 @@ seeded with empty values, and install_devices_empty is set to true.
 
 import os
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from cloudinit.subp import ProcessExecutionError
 
-distros = ['ubuntu', 'debian']
+distros = ["ubuntu", "debian"]
 
 
 def fetch_idevs(log):
@@ -60,8 +59,9 @@ def fetch_idevs(log):
 
     try:
         # get the root disk where the /boot directory resides.
-        disk = subp.subp(['grub-probe', '-t', 'disk', '/boot'],
-                         capture=True)[0].strip()
+        disk = subp.subp(["grub-probe", "-t", "disk", "/boot"], capture=True)[
+            0
+        ].strip()
     except ProcessExecutionError as e:
         # grub-common may not be installed, especially on containers
         # FileNotFoundError is a nested exception of ProcessExecutionError
@@ -81,26 +81,30 @@ def fetch_idevs(log):
 
     if not disk or not os.path.exists(disk):
         # If we failed to detect a disk, we can return early
-        return ''
+        return ""
 
     try:
         # check if disk exists and use udevadm to fetch symlinks
-        devices = subp.subp(
-            ['udevadm', 'info', '--root', '--query=symlink', disk],
-            capture=True
-        )[0].strip().split()
+        devices = (
+            subp.subp(
+                ["udevadm", "info", "--root", "--query=symlink", disk],
+                capture=True,
+            )[0]
+            .strip()
+            .split()
+        )
     except Exception:
         util.logexc(
             log, "udevadm DEVLINKS symlink query failed for disk='%s'", disk
         )
 
-    log.debug('considering these device symlinks: %s', ','.join(devices))
+    log.debug("considering these device symlinks: %s", ",".join(devices))
     # filter symlinks for /dev/disk/by-id entries
-    devices = [dev for dev in devices if 'disk/by-id' in dev]
-    log.debug('filtered to these disk/by-id symlinks: %s', ','.join(devices))
+    devices = [dev for dev in devices if "disk/by-id" in dev]
+    log.debug("filtered to these disk/by-id symlinks: %s", ",".join(devices))
     # select first device if there is one, else fall back to plain name
     idevs = sorted(devices)[0] if devices else disk
-    log.debug('selected %s', idevs)
+    log.debug("selected %s", idevs)
 
     return idevs
 
@@ -111,14 +115,15 @@ def handle(name, cfg, _cloud, log, _args):
     if not mycfg:
         mycfg = {}
 
-    enabled = mycfg.get('enabled', True)
+    enabled = mycfg.get("enabled", True)
     if util.is_false(enabled):
         log.debug("%s disabled by config grub_dpkg/enabled=%s", name, enabled)
         return
 
     idevs = util.get_cfg_option_str(mycfg, "grub-pc/install_devices", None)
     idevs_empty = util.get_cfg_option_str(
-        mycfg, "grub-pc/install_devices_empty", None)
+        mycfg, "grub-pc/install_devices_empty", None
+    )
 
     if idevs is None:
         idevs = fetch_idevs(log)
@@ -128,16 +133,21 @@ def handle(name, cfg, _cloud, log, _args):
     # now idevs and idevs_empty are set to determined values
     # or, those set by user
 
-    dconf_sel = (("grub-pc grub-pc/install_devices string %s\n"
-                 "grub-pc grub-pc/install_devices_empty boolean %s\n") %
-                 (idevs, idevs_empty))
+    dconf_sel = (
+        "grub-pc grub-pc/install_devices string %s\n"
+        "grub-pc grub-pc/install_devices_empty boolean %s\n"
+        % (idevs, idevs_empty)
+    )
 
-    log.debug("Setting grub debconf-set-selections with '%s','%s'" %
-              (idevs, idevs_empty))
+    log.debug(
+        "Setting grub debconf-set-selections with '%s','%s'"
+        % (idevs, idevs_empty)
+    )
 
     try:
-        subp.subp(['debconf-set-selections'], dconf_sel)
+        subp.subp(["debconf-set-selections"], dconf_sel)
     except Exception:
         util.logexc(log, "Failed to run debconf-set-selections for grub-dpkg")
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_install_hotplug.py b/cloudinit/config/cc_install_hotplug.py
index 9b4075cc..952d9f13 100644
--- a/cloudinit/config/cc_install_hotplug.py
+++ b/cloudinit/config/cc_install_hotplug.py
@@ -3,15 +3,12 @@
 import os
 from textwrap import dedent
 
-from cloudinit import util
-from cloudinit import subp
-from cloudinit import stages
+from cloudinit import stages, subp, util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.distros import ALL_DISTROS
-from cloudinit.event import EventType, EventScope
+from cloudinit.event import EventScope, EventType
 from cloudinit.settings import PER_INSTANCE
 
-
 frequency = PER_INSTANCE
 distros = [ALL_DISTROS]
 
@@ -19,7 +16,8 @@ meta = {
     "id": "cc_install_hotplug",
     "name": "Install Hotplug",
     "title": "Install hotplug if supported and enabled",
-    "description": dedent("""\
+    "description": dedent(
+        """\
         This module will install the udev rules to enable hotplug if
         supported by the datasource and enabled in the userdata. The udev
         rules will be installed as
@@ -32,21 +30,26 @@ meta = {
         network configuration.
 
         Currently supported datasources: Openstack, EC2
-    """),
+    """
+    ),
     "distros": distros,
     "examples": [
-        dedent("""\
+        dedent(
+            """\
             # Enable hotplug of network devices
             updates:
               network:
                 when: ["hotplug"]
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
             # Enable network hotplug alongside boot event
             updates:
               network:
                 when: ["boot", "hotplug"]
-        """),
+        """
+        ),
     ],
     "frequency": frequency,
 }
@@ -74,14 +77,14 @@ schema = {
                                     "boot-legacy",
                                     "boot",
                                     "hotplug",
-                                ]
-                            }
+                                ],
+                            },
                         }
-                    }
+                    },
                 }
-            }
+            },
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)
@@ -100,14 +103,15 @@ LABEL="cloudinit_end"
 def handle(_name, cfg, cloud, log, _args):
     validate_cloudconfig_schema(cfg, schema)
     network_hotplug_enabled = (
-        'updates' in cfg and
-        'network' in cfg['updates'] and
-        'when' in cfg['updates']['network'] and
-        'hotplug' in cfg['updates']['network']['when']
+        "updates" in cfg
+        and "network" in cfg["updates"]
+        and "when" in cfg["updates"]["network"]
+        and "hotplug" in cfg["updates"]["network"]["when"]
     )
     hotplug_supported = EventType.HOTPLUG in (
-        cloud.datasource.get_supported_events(
-            [EventType.HOTPLUG]).get(EventScope.NETWORK, set())
+        cloud.datasource.get_supported_events([EventType.HOTPLUG]).get(
+            EventScope.NETWORK, set()
+        )
     )
     hotplug_enabled = stages.update_event_enabled(
         datasource=cloud.datasource,
diff --git a/cloudinit/config/cc_keys_to_console.py b/cloudinit/config/cc_keys_to_console.py
index d72b5244..ab35e136 100644
--- a/cloudinit/config/cc_keys_to_console.py
+++ b/cloudinit/config/cc_keys_to_console.py
@@ -38,49 +38,53 @@ host keys are not written to console.
 
 import os
 
+from cloudinit import subp, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import subp
-from cloudinit import util
 
 frequency = PER_INSTANCE
 
 # This is a tool that cloud init provides
-HELPER_TOOL_TPL = '%s/cloud-init/write-ssh-key-fingerprints'
+HELPER_TOOL_TPL = "%s/cloud-init/write-ssh-key-fingerprints"
 
 
 def _get_helper_tool_path(distro):
     try:
         base_lib = distro.usr_lib_exec
     except AttributeError:
-        base_lib = '/usr/lib'
+        base_lib = "/usr/lib"
     return HELPER_TOOL_TPL % base_lib
 
 
 def handle(name, cfg, cloud, log, _args):
     if util.is_false(cfg.get("ssh", {}).get("emit_keys_to_console", True)):
-        log.debug(("Skipping module named %s, "
-                   "logging of SSH host keys disabled"), name)
+        log.debug(
+            "Skipping module named %s, logging of SSH host keys disabled", name
+        )
         return
 
     helper_path = _get_helper_tool_path(cloud.distro)
     if not os.path.exists(helper_path):
-        log.warning(("Unable to activate module %s,"
-                     " helper tool not found at %s"), name, helper_path)
+        log.warning(
+            "Unable to activate module %s, helper tool not found at %s",
+            name,
+            helper_path,
+        )
         return
 
-    fp_blacklist = util.get_cfg_option_list(cfg,
-                                            "ssh_fp_console_blacklist", [])
-    key_blacklist = util.get_cfg_option_list(cfg,
-                                             "ssh_key_console_blacklist",
-                                             ["ssh-dss"])
+    fp_blacklist = util.get_cfg_option_list(
+        cfg, "ssh_fp_console_blacklist", []
+    )
+    key_blacklist = util.get_cfg_option_list(
+        cfg, "ssh_key_console_blacklist", ["ssh-dss"]
+    )
 
     try:
-        cmd = [helper_path, ','.join(fp_blacklist), ','.join(key_blacklist)]
+        cmd = [helper_path, ",".join(fp_blacklist), ",".join(key_blacklist)]
         (stdout, _stderr) = subp.subp(cmd)
-        util.multi_log("%s\n" % (stdout.strip()),
-                       stderr=False, console=True)
+        util.multi_log("%s\n" % (stdout.strip()), stderr=False, console=True)
     except Exception:
         log.warning("Writing keys to the system console failed!")
         raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_landscape.py b/cloudinit/config/cc_landscape.py
index 299c4d01..03ebf411 100644
--- a/cloudinit/config/cc_landscape.py
+++ b/cloudinit/config/cc_landscape.py
@@ -60,10 +60,7 @@ from io import BytesIO
 
 from configobj import ConfigObj
 
-from cloudinit import type_utils
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import subp, type_utils, util
 from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
@@ -71,15 +68,15 @@ frequency = PER_INSTANCE
 LSC_CLIENT_CFG_FILE = "/etc/landscape/client.conf"
 LS_DEFAULT_FILE = "/etc/default/landscape-client"
 
-distros = ['ubuntu']
+distros = ["ubuntu"]
 
 # defaults taken from stock client.conf in landscape-client 11.07.1.1-0ubuntu2
 LSC_BUILTIN_CFG = {
-    'client': {
-        'log_level': "info",
-        'url': "https://landscape.canonical.com/message-system",
-        'ping_url': "http://landscape.canonical.com/ping",
-        'data_path': "/var/lib/landscape/client",
+    "client": {
+        "log_level": "info",
+        "url": "https://landscape.canonical.com/message-system",
+        "ping_url": "http://landscape.canonical.com/ping",
+        "data_path": "/var/lib/landscape/client",
     }
 }
 
@@ -97,11 +94,13 @@ def handle(_name, cfg, cloud, log, _args):
         raise RuntimeError(
             "'landscape' key existed in config, but not a dictionary type,"
             " is a {_type} instead".format(
-                _type=type_utils.obj_name(ls_cloudcfg)))
+                _type=type_utils.obj_name(ls_cloudcfg)
+            )
+        )
     if not ls_cloudcfg:
         return
 
-    cloud.distro.install_packages(('landscape-client',))
+    cloud.distro.install_packages(("landscape-client",))
 
     merge_data = [
         LSC_BUILTIN_CFG,
@@ -135,4 +134,5 @@ def merge_together(objs):
             cfg.merge(ConfigObj(obj))
     return cfg
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_locale.py b/cloudinit/config/cc_locale.py
index 7fed9abd..487f58f7 100644
--- a/cloudinit/config/cc_locale.py
+++ b/cloudinit/config/cc_locale.py
@@ -14,45 +14,48 @@ from cloudinit import util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 
-
 frequency = PER_INSTANCE
-distros = ['all']
+distros = ["all"]
 meta = {
-    'id': 'cc_locale',
-    'name': 'Locale',
-    'title': 'Set system locale',
-    'description': dedent(
+    "id": "cc_locale",
+    "name": "Locale",
+    "title": "Set system locale",
+    "description": dedent(
         """\
         Configure the system locale and apply it system wide. By default use
         the locale specified by the datasource."""
     ),
-    'distros': distros,
-    'examples': [
-        dedent("""\
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
             # Set the locale to ar_AE
             locale: ar_AE
-            """),
-        dedent("""\
+            """
+        ),
+        dedent(
+            """\
             # Set the locale to fr_CA in /etc/alternate_path/locale
             locale: fr_CA
             locale_configfile: /etc/alternate_path/locale
-            """),
+            """
+        ),
     ],
-    'frequency': frequency,
+    "frequency": frequency,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'locale': {
-            'type': 'string',
-            'description': (
+    "type": "object",
+    "properties": {
+        "locale": {
+            "type": "string",
+            "description": (
                 "The locale to set as the system's locale (e.g. ar_PS)"
             ),
         },
-        'locale_configfile': {
-            'type': 'string',
-            'description': (
+        "locale_configfile": {
+            "type": "string",
+            "description": (
                 "The file in which to write the locale configuration (defaults"
                 " to the distro's default location)"
             ),
@@ -70,8 +73,9 @@ def handle(name, cfg, cloud, log, args):
         locale = util.get_cfg_option_str(cfg, "locale", cloud.get_locale())
 
     if util.is_false(locale):
-        log.debug("Skipping module named %s, disabled by config: %s",
-                  name, locale)
+        log.debug(
+            "Skipping module named %s, disabled by config: %s", name, locale
+        )
         return
 
     validate_cloudconfig_schema(cfg, schema)
@@ -80,4 +84,5 @@ def handle(name, cfg, cloud, log, args):
     locale_cfgfile = util.get_cfg_option_str(cfg, "locale_configfile")
     cloud.distro.apply_locale(locale, locale_cfgfile)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_lxd.py b/cloudinit/config/cc_lxd.py
index 486037d9..13ddcbe9 100644
--- a/cloudinit/config/cc_lxd.py
+++ b/cloudinit/config/cc_lxd.py
@@ -47,12 +47,12 @@ lxd-bridge will be configured accordingly.
             domain: <domain>
 """
 
-from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
 import os
 
-distros = ['ubuntu']
+from cloudinit import log as logging
+from cloudinit import subp, util
+
+distros = ["ubuntu"]
 
 LOG = logging.getLogger(__name__)
 
@@ -61,36 +61,42 @@ _DEFAULT_NETWORK_NAME = "lxdbr0"
 
 def handle(name, cfg, cloud, log, args):
     # Get config
-    lxd_cfg = cfg.get('lxd')
+    lxd_cfg = cfg.get("lxd")
     if not lxd_cfg:
-        log.debug("Skipping module named %s, not present or disabled by cfg",
-                  name)
+        log.debug(
+            "Skipping module named %s, not present or disabled by cfg", name
+        )
         return
     if not isinstance(lxd_cfg, dict):
-        log.warning("lxd config must be a dictionary. found a '%s'",
-                    type(lxd_cfg))
+        log.warning(
+            "lxd config must be a dictionary. found a '%s'", type(lxd_cfg)
+        )
         return
 
     # Grab the configuration
-    init_cfg = lxd_cfg.get('init')
+    init_cfg = lxd_cfg.get("init")
     if not isinstance(init_cfg, dict):
-        log.warning("lxd/init config must be a dictionary. found a '%s'",
-                    type(init_cfg))
+        log.warning(
+            "lxd/init config must be a dictionary. found a '%s'",
+            type(init_cfg),
+        )
         init_cfg = {}
 
-    bridge_cfg = lxd_cfg.get('bridge', {})
+    bridge_cfg = lxd_cfg.get("bridge", {})
     if not isinstance(bridge_cfg, dict):
-        log.warning("lxd/bridge config must be a dictionary. found a '%s'",
-                    type(bridge_cfg))
+        log.warning(
+            "lxd/bridge config must be a dictionary. found a '%s'",
+            type(bridge_cfg),
+        )
         bridge_cfg = {}
 
     # Install the needed packages
     packages = []
     if not subp.which("lxd"):
-        packages.append('lxd')
+        packages.append("lxd")
 
-    if init_cfg.get("storage_backend") == "zfs" and not subp.which('zfs'):
-        packages.append('zfsutils-linux')
+    if init_cfg.get("storage_backend") == "zfs" and not subp.which("zfs"):
+        packages.append("zfsutils-linux")
 
     if len(packages):
         try:
@@ -102,23 +108,30 @@ def handle(name, cfg, cloud, log, args):
     # Set up lxd if init config is given
     if init_cfg:
         init_keys = (
-            'network_address', 'network_port', 'storage_backend',
-            'storage_create_device', 'storage_create_loop',
-            'storage_pool', 'trust_password')
-        subp.subp(['lxd', 'waitready', '--timeout=300'])
-        cmd = ['lxd', 'init', '--auto']
+            "network_address",
+            "network_port",
+            "storage_backend",
+            "storage_create_device",
+            "storage_create_loop",
+            "storage_pool",
+            "trust_password",
+        )
+        subp.subp(["lxd", "waitready", "--timeout=300"])
+        cmd = ["lxd", "init", "--auto"]
         for k in init_keys:
             if init_cfg.get(k):
-                cmd.extend(["--%s=%s" %
-                            (k.replace('_', '-'), str(init_cfg[k]))])
+                cmd.extend(
+                    ["--%s=%s" % (k.replace("_", "-"), str(init_cfg[k]))]
+                )
         subp.subp(cmd)
 
     # Set up lxd-bridge if bridge config is given
     dconf_comm = "debconf-communicate"
     if bridge_cfg:
         net_name = bridge_cfg.get("name", _DEFAULT_NETWORK_NAME)
-        if os.path.exists("/etc/default/lxd-bridge") \
-                and subp.which(dconf_comm):
+        if os.path.exists("/etc/default/lxd-bridge") and subp.which(
+            dconf_comm
+        ):
             # Bridge configured through packaging
 
             debconf = bridge_to_debconf(bridge_cfg)
@@ -126,39 +139,47 @@ def handle(name, cfg, cloud, log, args):
             # Update debconf database
             try:
                 log.debug("Setting lxd debconf via " + dconf_comm)
-                data = "\n".join(["set %s %s" % (k, v)
-                                  for k, v in debconf.items()]) + "\n"
-                subp.subp(['debconf-communicate'], data)
+                data = (
+                    "\n".join(
+                        ["set %s %s" % (k, v) for k, v in debconf.items()]
+                    )
+                    + "\n"
+                )
+                subp.subp(["debconf-communicate"], data)
             except Exception:
-                util.logexc(log, "Failed to run '%s' for lxd with" %
-                            dconf_comm)
+                util.logexc(
+                    log, "Failed to run '%s' for lxd with" % dconf_comm
+                )
 
             # Remove the existing configuration file (forces re-generation)
             util.del_file("/etc/default/lxd-bridge")
 
             # Run reconfigure
             log.debug("Running dpkg-reconfigure for lxd")
-            subp.subp(['dpkg-reconfigure', 'lxd',
-                       '--frontend=noninteractive'])
+            subp.subp(["dpkg-reconfigure", "lxd", "--frontend=noninteractive"])
         else:
             # Built-in LXD bridge support
             cmd_create, cmd_attach = bridge_to_cmd(bridge_cfg)
             maybe_cleanup_default(
-                net_name=net_name, did_init=bool(init_cfg),
-                create=bool(cmd_create), attach=bool(cmd_attach))
+                net_name=net_name,
+                did_init=bool(init_cfg),
+                create=bool(cmd_create),
+                attach=bool(cmd_attach),
+            )
             if cmd_create:
-                log.debug("Creating lxd bridge: %s" %
-                          " ".join(cmd_create))
+                log.debug("Creating lxd bridge: %s" % " ".join(cmd_create))
                 _lxc(cmd_create)
 
             if cmd_attach:
-                log.debug("Setting up default lxd bridge: %s" %
-                          " ".join(cmd_attach))
+                log.debug(
+                    "Setting up default lxd bridge: %s" % " ".join(cmd_attach)
+                )
                 _lxc(cmd_attach)
 
     elif bridge_cfg:
         raise RuntimeError(
-            "Unable to configure lxd bridge without %s." + dconf_comm)
+            "Unable to configure lxd bridge without %s." + dconf_comm
+        )
 
 
 def bridge_to_debconf(bridge_cfg):
@@ -180,33 +201,32 @@ def bridge_to_debconf(bridge_cfg):
 
         if bridge_cfg.get("ipv4_address"):
             debconf["lxd/bridge-ipv4"] = "true"
-            debconf["lxd/bridge-ipv4-address"] = \
-                bridge_cfg.get("ipv4_address")
-            debconf["lxd/bridge-ipv4-netmask"] = \
-                bridge_cfg.get("ipv4_netmask")
-            debconf["lxd/bridge-ipv4-dhcp-first"] = \
-                bridge_cfg.get("ipv4_dhcp_first")
-            debconf["lxd/bridge-ipv4-dhcp-last"] = \
-                bridge_cfg.get("ipv4_dhcp_last")
-            debconf["lxd/bridge-ipv4-dhcp-leases"] = \
-                bridge_cfg.get("ipv4_dhcp_leases")
-            debconf["lxd/bridge-ipv4-nat"] = \
-                bridge_cfg.get("ipv4_nat", "true")
+            debconf["lxd/bridge-ipv4-address"] = bridge_cfg.get("ipv4_address")
+            debconf["lxd/bridge-ipv4-netmask"] = bridge_cfg.get("ipv4_netmask")
+            debconf["lxd/bridge-ipv4-dhcp-first"] = bridge_cfg.get(
+                "ipv4_dhcp_first"
+            )
+            debconf["lxd/bridge-ipv4-dhcp-last"] = bridge_cfg.get(
+                "ipv4_dhcp_last"
+            )
+            debconf["lxd/bridge-ipv4-dhcp-leases"] = bridge_cfg.get(
+                "ipv4_dhcp_leases"
+            )
+            debconf["lxd/bridge-ipv4-nat"] = bridge_cfg.get("ipv4_nat", "true")
 
         if bridge_cfg.get("ipv6_address"):
             debconf["lxd/bridge-ipv6"] = "true"
-            debconf["lxd/bridge-ipv6-address"] = \
-                bridge_cfg.get("ipv6_address")
-            debconf["lxd/bridge-ipv6-netmask"] = \
-                bridge_cfg.get("ipv6_netmask")
-            debconf["lxd/bridge-ipv6-nat"] = \
-                bridge_cfg.get("ipv6_nat", "false")
+            debconf["lxd/bridge-ipv6-address"] = bridge_cfg.get("ipv6_address")
+            debconf["lxd/bridge-ipv6-netmask"] = bridge_cfg.get("ipv6_netmask")
+            debconf["lxd/bridge-ipv6-nat"] = bridge_cfg.get(
+                "ipv6_nat", "false"
+            )
 
         if bridge_cfg.get("domain"):
             debconf["lxd/bridge-domain"] = bridge_cfg.get("domain")
 
     else:
-        raise Exception("invalid bridge mode \"%s\"" % bridge_cfg.get("mode"))
+        raise Exception('invalid bridge mode "%s"' % bridge_cfg.get("mode"))
 
     return debconf
 
@@ -217,37 +237,41 @@ def bridge_to_cmd(bridge_cfg):
 
     bridge_name = bridge_cfg.get("name", _DEFAULT_NETWORK_NAME)
     cmd_create = []
-    cmd_attach = ["network", "attach-profile", bridge_name,
-                  "default", "eth0"]
+    cmd_attach = ["network", "attach-profile", bridge_name, "default", "eth0"]
 
     if bridge_cfg.get("mode") == "existing":
         return None, cmd_attach
 
     if bridge_cfg.get("mode") != "new":
-        raise Exception("invalid bridge mode \"%s\"" % bridge_cfg.get("mode"))
+        raise Exception('invalid bridge mode "%s"' % bridge_cfg.get("mode"))
 
     cmd_create = ["network", "create", bridge_name]
 
     if bridge_cfg.get("ipv4_address") and bridge_cfg.get("ipv4_netmask"):
-        cmd_create.append("ipv4.address=%s/%s" %
-                          (bridge_cfg.get("ipv4_address"),
-                           bridge_cfg.get("ipv4_netmask")))
+        cmd_create.append(
+            "ipv4.address=%s/%s"
+            % (bridge_cfg.get("ipv4_address"), bridge_cfg.get("ipv4_netmask"))
+        )
 
         if bridge_cfg.get("ipv4_nat", "true") == "true":
             cmd_create.append("ipv4.nat=true")
 
-        if bridge_cfg.get("ipv4_dhcp_first") and \
-                bridge_cfg.get("ipv4_dhcp_last"):
-            dhcp_range = "%s-%s" % (bridge_cfg.get("ipv4_dhcp_first"),
-                                    bridge_cfg.get("ipv4_dhcp_last"))
+        if bridge_cfg.get("ipv4_dhcp_first") and bridge_cfg.get(
+            "ipv4_dhcp_last"
+        ):
+            dhcp_range = "%s-%s" % (
+                bridge_cfg.get("ipv4_dhcp_first"),
+                bridge_cfg.get("ipv4_dhcp_last"),
+            )
             cmd_create.append("ipv4.dhcp.ranges=%s" % dhcp_range)
     else:
         cmd_create.append("ipv4.address=none")
 
     if bridge_cfg.get("ipv6_address") and bridge_cfg.get("ipv6_netmask"):
-        cmd_create.append("ipv6.address=%s/%s" %
-                          (bridge_cfg.get("ipv6_address"),
-                           bridge_cfg.get("ipv6_netmask")))
+        cmd_create.append(
+            "ipv6.address=%s/%s"
+            % (bridge_cfg.get("ipv6_address"), bridge_cfg.get("ipv6_netmask"))
+        )
 
         if bridge_cfg.get("ipv6_nat", "false") == "true":
             cmd_create.append("ipv6.nat=true")
@@ -262,14 +286,17 @@ def bridge_to_cmd(bridge_cfg):
 
 
 def _lxc(cmd):
-    env = {'LC_ALL': 'C',
-           'HOME': os.environ.get('HOME', '/root'),
-           'USER': os.environ.get('USER', 'root')}
-    subp.subp(['lxc'] + list(cmd) + ["--force-local"], update_env=env)
+    env = {
+        "LC_ALL": "C",
+        "HOME": os.environ.get("HOME", "/root"),
+        "USER": os.environ.get("USER", "root"),
+    }
+    subp.subp(["lxc"] + list(cmd) + ["--force-local"], update_env=env)
 
 
-def maybe_cleanup_default(net_name, did_init, create, attach,
-                          profile="default", nic_name="eth0"):
+def maybe_cleanup_default(
+    net_name, did_init, create, attach, profile="default", nic_name="eth0"
+):
     """Newer versions of lxc (3.0.1+) create a lxdbr0 network when
     'lxd init --auto' is run.  Older versions did not.
 
@@ -306,4 +333,5 @@ def maybe_cleanup_default(net_name, did_init, create, attach,
                 raise e
             LOG.debug(msg, nic_name, profile, fail_assume_enoent)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_mcollective.py b/cloudinit/config/cc_mcollective.py
index 41ea4fc9..1b0158ec 100644
--- a/cloudinit/config/cc_mcollective.py
+++ b/cloudinit/config/cc_mcollective.py
@@ -56,18 +56,21 @@ import io
 from configobj import ConfigObj
 
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 PUBCERT_FILE = "/etc/mcollective/ssl/server-public.pem"
 PRICERT_FILE = "/etc/mcollective/ssl/server-private.pem"
-SERVER_CFG = '/etc/mcollective/server.cfg'
+SERVER_CFG = "/etc/mcollective/server.cfg"
 
 LOG = logging.getLogger(__name__)
 
 
-def configure(config, server_cfg=SERVER_CFG,
-              pubcert_file=PUBCERT_FILE, pricert_file=PRICERT_FILE):
+def configure(
+    config,
+    server_cfg=SERVER_CFG,
+    pubcert_file=PUBCERT_FILE,
+    pricert_file=PRICERT_FILE,
+):
     # Read server.cfg (if it exists) values from the
     # original file in order to be able to mix the rest up.
     try:
@@ -77,20 +80,20 @@ def configure(config, server_cfg=SERVER_CFG,
         if e.errno != errno.ENOENT:
             raise
         else:
-            LOG.debug("Did not find file %s (starting with an empty"
-                      " config)", server_cfg)
+            LOG.debug(
+                "Did not find file %s (starting with an empty config)",
+                server_cfg,
+            )
             mcollective_config = ConfigObj()
     for (cfg_name, cfg) in config.items():
-        if cfg_name == 'public-cert':
+        if cfg_name == "public-cert":
             util.write_file(pubcert_file, cfg, mode=0o644)
-            mcollective_config[
-                'plugin.ssl_server_public'] = pubcert_file
-            mcollective_config['securityprovider'] = 'ssl'
-        elif cfg_name == 'private-cert':
+            mcollective_config["plugin.ssl_server_public"] = pubcert_file
+            mcollective_config["securityprovider"] = "ssl"
+        elif cfg_name == "private-cert":
             util.write_file(pricert_file, cfg, mode=0o600)
-            mcollective_config[
-                'plugin.ssl_server_private'] = pricert_file
-            mcollective_config['securityprovider'] = 'ssl'
+            mcollective_config["plugin.ssl_server_private"] = pricert_file
+            mcollective_config["securityprovider"] = "ssl"
         else:
             if isinstance(cfg, str):
                 # Just set it in the 'main' section
@@ -126,21 +129,24 @@ def configure(config, server_cfg=SERVER_CFG,
 def handle(name, cfg, cloud, log, _args):
 
     # If there isn't a mcollective key in the configuration don't do anything
-    if 'mcollective' not in cfg:
-        log.debug(("Skipping module named %s, "
-                   "no 'mcollective' key in configuration"), name)
+    if "mcollective" not in cfg:
+        log.debug(
+            "Skipping module named %s, no 'mcollective' key in configuration",
+            name,
+        )
         return
 
-    mcollective_cfg = cfg['mcollective']
+    mcollective_cfg = cfg["mcollective"]
 
     # Start by installing the mcollective package ...
     cloud.distro.install_packages(("mcollective",))
 
     # ... and then update the mcollective configuration
-    if 'conf' in mcollective_cfg:
-        configure(config=mcollective_cfg['conf'])
+    if "conf" in mcollective_cfg:
+        configure(config=mcollective_cfg["conf"])
 
     # restart mcollective to handle updated config
-    subp.subp(['service', 'mcollective', 'restart'], capture=False)
+    subp.subp(["service", "mcollective", "restart"], capture=False)
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_migrator.py b/cloudinit/config/cc_migrator.py
index 79bcc27d..4fafb4af 100644
--- a/cloudinit/config/cc_migrator.py
+++ b/cloudinit/config/cc_migrator.py
@@ -29,16 +29,14 @@ false`` in config.
 import os
 import shutil
 
-from cloudinit import helpers
-from cloudinit import util
-
+from cloudinit import helpers, util
 from cloudinit.settings import PER_ALWAYS
 
 frequency = PER_ALWAYS
 
 
 def _migrate_canon_sems(cloud):
-    paths = (cloud.paths.get_ipath('sem'), cloud.paths.get_cpath('sem'))
+    paths = (cloud.paths.get_ipath("sem"), cloud.paths.get_cpath("sem"))
     am_adjusted = 0
     for sem_path in paths:
         if not sem_path or not os.path.exists(sem_path):
@@ -57,12 +55,12 @@ def _migrate_canon_sems(cloud):
 
 def _migrate_legacy_sems(cloud, log):
     legacy_adjust = {
-        'apt-update-upgrade': [
-            'apt-configure',
-            'package-update-upgrade-install',
+        "apt-update-upgrade": [
+            "apt-configure",
+            "package-update-upgrade-install",
         ],
     }
-    paths = (cloud.paths.get_ipath('sem'), cloud.paths.get_cpath('sem'))
+    paths = (cloud.paths.get_ipath("sem"), cloud.paths.get_cpath("sem"))
     for sem_path in paths:
         if not sem_path or not os.path.exists(sem_path):
             continue
@@ -78,8 +76,9 @@ def _migrate_legacy_sems(cloud, log):
                 util.del_file(os.path.join(sem_path, p))
                 (_name, freq) = os.path.splitext(p)
                 for m in migrate_to:
-                    log.debug("Migrating %s => %s with the same frequency",
-                              p, m)
+                    log.debug(
+                        "Migrating %s => %s with the same frequency", p, m
+                    )
                     with sem_helper.lock(m, freq):
                         pass
 
@@ -90,8 +89,10 @@ def handle(name, cfg, cloud, log, _args):
         log.debug("Skipping module named %s, migration disabled", name)
         return
     sems_moved = _migrate_canon_sems(cloud)
-    log.debug("Migrated %s semaphore files to there canonicalized names",
-              sems_moved)
+    log.debug(
+        "Migrated %s semaphore files to there canonicalized names", sems_moved
+    )
     _migrate_legacy_sems(cloud, log)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_mounts.py b/cloudinit/config/cc_mounts.py
index eeb008d2..ec2e46ff 100644
--- a/cloudinit/config/cc_mounts.py
+++ b/cloudinit/config/cc_mounts.py
@@ -62,15 +62,12 @@ swap file is created.
         maxsize: <size in bytes>
 """
 
-from string import whitespace
-
 import logging
 import os
 import re
+from string import whitespace
 
-from cloudinit import type_utils
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, type_utils, util
 
 # Shortname matches 'sda', 'sda1', 'xvda', 'hda', 'sdb', xvdb, vda, vdd1, sr0
 DEVICE_NAME_FILTER = r"^([x]{0,1}[shv]d[a-z][0-9]*|sr[0-9]+)$"
@@ -105,21 +102,25 @@ def is_network_device(name):
 
 
 def _get_nth_partition_for_device(device_path, partition_number):
-    potential_suffixes = [str(partition_number), 'p%s' % (partition_number,),
-                          '-part%s' % (partition_number,)]
+    potential_suffixes = [
+        str(partition_number),
+        "p%s" % (partition_number,),
+        "-part%s" % (partition_number,),
+    ]
     for suffix in potential_suffixes:
-        potential_partition_device = '%s%s' % (device_path, suffix)
+        potential_partition_device = "%s%s" % (device_path, suffix)
         if os.path.exists(potential_partition_device):
             return potential_partition_device
     return None
 
 
 def _is_block_device(device_path, partition_path=None):
-    device_name = os.path.realpath(device_path).split('/')[-1]
-    sys_path = os.path.join('/sys/block/', device_name)
+    device_name = os.path.realpath(device_path).split("/")[-1]
+    sys_path = os.path.join("/sys/block/", device_name)
     if partition_path is not None:
         sys_path = os.path.join(
-            sys_path, os.path.realpath(partition_path).split('/')[-1])
+            sys_path, os.path.realpath(partition_path).split("/")[-1]
+        )
     return os.path.exists(sys_path)
 
 
@@ -159,8 +160,9 @@ def sanitize_devname(startname, transformer, log, aliases=None):
     if partition_number is None:
         partition_path = _get_nth_partition_for_device(device_path, 1)
     else:
-        partition_path = _get_nth_partition_for_device(device_path,
-                                                       partition_number)
+        partition_path = _get_nth_partition_for_device(
+            device_path, partition_number
+        )
         if partition_path is None:
             return None
 
@@ -174,12 +176,12 @@ def sanitize_devname(startname, transformer, log, aliases=None):
 def suggested_swapsize(memsize=None, maxsize=None, fsys=None):
     # make a suggestion on the size of swap for this system.
     if memsize is None:
-        memsize = util.read_meminfo()['total']
+        memsize = util.read_meminfo()["total"]
 
     GB = 2 ** 30
     sugg_max = 8 * GB
 
-    info = {'avail': 'na', 'max_in': maxsize, 'mem': memsize}
+    info = {"avail": "na", "max_in": maxsize, "mem": memsize}
 
     if fsys is None and maxsize is None:
         # set max to 8GB default if no filesystem given
@@ -187,18 +189,18 @@ def suggested_swapsize(memsize=None, maxsize=None, fsys=None):
     elif fsys:
         statvfs = os.statvfs(fsys)
         avail = statvfs.f_frsize * statvfs.f_bfree
-        info['avail'] = avail
+        info["avail"] = avail
 
         if maxsize is None:
             # set to 25% of filesystem space
             maxsize = min(int(avail / 4), sugg_max)
-        elif maxsize > ((avail * .9)):
+        elif maxsize > ((avail * 0.9)):
             # set to 90% of available disk space
-            maxsize = int(avail * .9)
+            maxsize = int(avail * 0.9)
     elif maxsize is None:
         maxsize = sugg_max
 
-    info['max'] = maxsize
+    info["max"] = maxsize
 
     formulas = [
         # < 1G: swap = double memory
@@ -226,7 +228,7 @@ def suggested_swapsize(memsize=None, maxsize=None, fsys=None):
     if size is not None:
         size = maxsize
 
-    info['size'] = size
+    info["size"] = size
 
     MB = 2 ** 20
     pinfo = {}
@@ -236,9 +238,14 @@ def suggested_swapsize(memsize=None, maxsize=None, fsys=None):
         else:
             pinfo[k] = v
 
-    LOG.debug("suggest %s swap for %s memory with '%s'"
-              " disk given max=%s [max=%s]'", pinfo['size'], pinfo['mem'],
-              pinfo['avail'], pinfo['max_in'], pinfo['max'])
+    LOG.debug(
+        "suggest %s swap for %s memory with '%s' disk given max=%s [max=%s]'",
+        pinfo["size"],
+        pinfo["mem"],
+        pinfo["avail"],
+        pinfo["max_in"],
+        pinfo["max"],
+    )
     return size
 
 
@@ -248,14 +255,23 @@ def create_swapfile(fname: str, size: str) -> None:
     errmsg = "Failed to create swapfile '%s' of size %sMB via %s: %s"
 
     def create_swap(fname, size, method):
-        LOG.debug("Creating swapfile in '%s' on fstype '%s' using '%s'",
-                  fname, fstype, method)
+        LOG.debug(
+            "Creating swapfile in '%s' on fstype '%s' using '%s'",
+            fname,
+            fstype,
+            method,
+        )
 
         if method == "fallocate":
-            cmd = ['fallocate', '-l', '%sM' % size, fname]
+            cmd = ["fallocate", "-l", "%sM" % size, fname]
         elif method == "dd":
-            cmd = ['dd', 'if=/dev/zero', 'of=%s' % fname, 'bs=1M',
-                   'count=%s' % size]
+            cmd = [
+                "dd",
+                "if=/dev/zero",
+                "of=%s" % fname,
+                "bs=1M",
+                "count=%s" % size,
+            ]
 
         try:
             subp.subp(cmd, capture=True)
@@ -269,8 +285,9 @@ def create_swapfile(fname: str, size: str) -> None:
 
     fstype = util.get_mount_info(swap_dir)[1]
 
-    if (fstype == "xfs" and
-            util.kernel_version() < (4, 18)) or fstype == "btrfs":
+    if (
+        fstype == "xfs" and util.kernel_version() < (4, 18)
+    ) or fstype == "btrfs":
         create_swap(fname, size, "dd")
     else:
         try:
@@ -282,7 +299,7 @@ def create_swapfile(fname: str, size: str) -> None:
     if os.path.exists(fname):
         util.chmod(fname, 0o600)
     try:
-        subp.subp(['mkswap', fname])
+        subp.subp(["mkswap", fname])
     except subp.ProcessExecutionError:
         util.del_file(fname)
         raise
@@ -297,37 +314,42 @@ def setup_swapfile(fname, size=None, maxsize=None):
     swap_dir = os.path.dirname(fname)
     if str(size).lower() == "auto":
         try:
-            memsize = util.read_meminfo()['total']
+            memsize = util.read_meminfo()["total"]
         except IOError:
             LOG.debug("Not creating swap: failed to read meminfo")
             return
 
         util.ensure_dir(swap_dir)
-        size = suggested_swapsize(fsys=swap_dir, maxsize=maxsize,
-                                  memsize=memsize)
+        size = suggested_swapsize(
+            fsys=swap_dir, maxsize=maxsize, memsize=memsize
+        )
 
     mibsize = str(int(size / (2 ** 20)))
     if not size:
         LOG.debug("Not creating swap: suggested size was 0")
         return
 
-    util.log_time(LOG.debug, msg="Setting up swap file", func=create_swapfile,
-                  args=[fname, mibsize])
+    util.log_time(
+        LOG.debug,
+        msg="Setting up swap file",
+        func=create_swapfile,
+        args=[fname, mibsize],
+    )
 
     return fname
 
 
 def handle_swapcfg(swapcfg):
     """handle the swap config, calling setup_swap if necessary.
-       return None or (filename, size)
+    return None or (filename, size)
     """
     if not isinstance(swapcfg, dict):
         LOG.warning("input for swap config was not a dict.")
         return None
 
-    fname = swapcfg.get('filename', '/swap.img')
-    size = swapcfg.get('size', 0)
-    maxsize = swapcfg.get('maxsize', None)
+    fname = swapcfg.get("filename", "/swap.img")
+    size = swapcfg.get("size", 0)
+    maxsize = swapcfg.get("maxsize", None)
 
     if not (size and fname):
         LOG.debug("no need to setup swap")
@@ -335,8 +357,10 @@ def handle_swapcfg(swapcfg):
 
     if os.path.exists(fname):
         if not os.path.exists("/proc/swaps"):
-            LOG.debug("swap file %s exists, but no /proc/swaps exists, "
-                      "being safe", fname)
+            LOG.debug(
+                "swap file %s exists, but no /proc/swaps exists, being safe",
+                fname,
+            )
             return fname
         try:
             for line in util.load_file("/proc/swaps").splitlines():
@@ -345,8 +369,9 @@ def handle_swapcfg(swapcfg):
                     return fname
             LOG.debug("swap file %s exists, but not in /proc/swaps", fname)
         except Exception:
-            LOG.warning("swap file %s exists. Error reading /proc/swaps",
-                        fname)
+            LOG.warning(
+                "swap file %s exists. Error reading /proc/swaps", fname
+            )
             return fname
 
     try:
@@ -373,8 +398,10 @@ def handle(_name, cfg, cloud, log, _args):
     defvals = cfg.get("mount_default_fields", defvals)
 
     # these are our default set of mounts
-    defmnts = [["ephemeral0", "/mnt", "auto", defvals[3], "0", "2"],
-               ["swap", "none", "swap", "sw", "0", "0"]]
+    defmnts = [
+        ["ephemeral0", "/mnt", "auto", defvals[3], "0", "2"],
+        ["swap", "none", "swap", "sw", "0", "0"],
+    ]
 
     cfgmnt = []
     if "mounts" in cfg:
@@ -404,13 +431,17 @@ def handle(_name, cfg, cloud, log, _args):
     for i in range(len(cfgmnt)):
         # skip something that wasn't a list
         if not isinstance(cfgmnt[i], list):
-            log.warning("Mount option %s not a list, got a %s instead",
-                        (i + 1), type_utils.obj_name(cfgmnt[i]))
+            log.warning(
+                "Mount option %s not a list, got a %s instead",
+                (i + 1),
+                type_utils.obj_name(cfgmnt[i]),
+            )
             continue
 
         start = str(cfgmnt[i][0])
-        sanitized = sanitize_devname(start, cloud.device_name_to_device, log,
-                                     aliases=device_aliases)
+        sanitized = sanitize_devname(
+            start, cloud.device_name_to_device, log, aliases=device_aliases
+        )
         if sanitized != start:
             log.debug("changed %s => %s" % (start, sanitized))
 
@@ -418,8 +449,11 @@ def handle(_name, cfg, cloud, log, _args):
             log.debug("Ignoring nonexistent named mount %s", start)
             continue
         elif sanitized in fstab_devs:
-            log.info("Device %s already defined in fstab: %s",
-                     sanitized, fstab_devs[sanitized])
+            log.info(
+                "Device %s already defined in fstab: %s",
+                sanitized,
+                fstab_devs[sanitized],
+            )
             continue
 
         cfgmnt[i][0] = sanitized
@@ -452,8 +486,9 @@ def handle(_name, cfg, cloud, log, _args):
     # entry has the same device name
     for defmnt in defmnts:
         start = defmnt[0]
-        sanitized = sanitize_devname(start, cloud.device_name_to_device, log,
-                                     aliases=device_aliases)
+        sanitized = sanitize_devname(
+            start, cloud.device_name_to_device, log, aliases=device_aliases
+        )
         if sanitized != start:
             log.debug("changed default device %s => %s" % (start, sanitized))
 
@@ -461,8 +496,11 @@ def handle(_name, cfg, cloud, log, _args):
             log.debug("Ignoring nonexistent default named mount %s", start)
             continue
         elif sanitized in fstab_devs:
-            log.debug("Device %s already defined in fstab: %s",
-                      sanitized, fstab_devs[sanitized])
+            log.debug(
+                "Device %s already defined in fstab: %s",
+                sanitized,
+                fstab_devs[sanitized],
+            )
             continue
 
         defmnt[0] = sanitized
@@ -474,8 +512,7 @@ def handle(_name, cfg, cloud, log, _args):
                 break
 
         if cfgmnt_has:
-            log.debug(("Not including %s, already"
-                       " previously included"), start)
+            log.debug("Not including %s, already previously included", start)
             continue
         cfgmnt.append(defmnt)
 
@@ -488,7 +525,7 @@ def handle(_name, cfg, cloud, log, _args):
         else:
             actlist.append(x)
 
-    swapret = handle_swapcfg(cfg.get('swap', {}))
+    swapret = handle_swapcfg(cfg.get("swap", {}))
     if swapret:
         actlist.append([swapret, "none", "swap", "sw", "0", "0"])
 
@@ -507,10 +544,11 @@ def handle(_name, cfg, cloud, log, _args):
             needswap = True
         if line[1].startswith("/"):
             dirs.append(line[1])
-        cc_lines.append('\t'.join(line))
+        cc_lines.append("\t".join(line))
 
-    mount_points = [v['mountpoint'] for k, v in util.mounts().items()
-                    if 'mountpoint' in v]
+    mount_points = [
+        v["mountpoint"] for k, v in util.mounts().items() if "mountpoint" in v
+    ]
     for d in dirs:
         try:
             util.ensure_dir(d)
@@ -525,11 +563,12 @@ def handle(_name, cfg, cloud, log, _args):
     sadds = [WS.sub(" ", n) for n in cc_lines]
     sdrops = [WS.sub(" ", n) for n in fstab_removed]
 
-    sops = (["- " + drop for drop in sdrops if drop not in sadds] +
-            ["+ " + add for add in sadds if add not in sdrops])
+    sops = ["- " + drop for drop in sdrops if drop not in sadds] + [
+        "+ " + add for add in sadds if add not in sdrops
+    ]
 
     fstab_lines.extend(cc_lines)
-    contents = "%s\n" % ('\n'.join(fstab_lines))
+    contents = "%s\n" % "\n".join(fstab_lines)
     util.write_file(FSTAB_PATH, contents)
 
     activate_cmds = []
@@ -549,7 +588,7 @@ def handle(_name, cfg, cloud, log, _args):
 
     fmt = "Activating swap and mounts with: %s"
     for cmd in activate_cmds:
-        fmt = "Activate mounts: %s:" + ' '.join(cmd)
+        fmt = "Activate mounts: %s:" + " ".join(cmd)
         try:
             subp.subp(cmd)
             log.debug(fmt, "PASS")
@@ -557,4 +596,5 @@ def handle(_name, cfg, cloud, log, _args):
             log.warning(fmt, "FAIL")
             util.logexc(log, fmt, "FAIL")
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_ntp.py b/cloudinit/config/cc_ntp.py
index c55d5d86..a31da9bb 100644
--- a/cloudinit/config/cc_ntp.py
+++ b/cloudinit/config/cc_ntp.py
@@ -11,124 +11,132 @@ import os
 from textwrap import dedent
 
 from cloudinit import log as logging
-from cloudinit import temp_utils
-from cloudinit import templater
-from cloudinit import type_utils
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, temp_utils, templater, type_utils, util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
 frequency = PER_INSTANCE
-NTP_CONF = '/etc/ntp.conf'
+NTP_CONF = "/etc/ntp.conf"
 NR_POOL_SERVERS = 4
-distros = ['almalinux', 'alpine', 'centos', 'cloudlinux', 'debian',
-           'eurolinux', 'fedora', 'miraclelinux', 'openEuler', 'opensuse',
-           'photon', 'rhel', 'rocky', 'sles', 'ubuntu', 'virtuozzo']
+distros = [
+    "almalinux",
+    "alpine",
+    "centos",
+    "cloudlinux",
+    "debian",
+    "eurolinux",
+    "fedora",
+    "miraclelinux",
+    "openEuler",
+    "opensuse",
+    "photon",
+    "rhel",
+    "rocky",
+    "sles",
+    "ubuntu",
+    "virtuozzo",
+]
 
 NTP_CLIENT_CONFIG = {
-    'chrony': {
-        'check_exe': 'chronyd',
-        'confpath': '/etc/chrony.conf',
-        'packages': ['chrony'],
-        'service_name': 'chrony',
-        'template_name': 'chrony.conf.{distro}',
-        'template': None,
+    "chrony": {
+        "check_exe": "chronyd",
+        "confpath": "/etc/chrony.conf",
+        "packages": ["chrony"],
+        "service_name": "chrony",
+        "template_name": "chrony.conf.{distro}",
+        "template": None,
     },
-    'ntp': {
-        'check_exe': 'ntpd',
-        'confpath': NTP_CONF,
-        'packages': ['ntp'],
-        'service_name': 'ntp',
-        'template_name': 'ntp.conf.{distro}',
-        'template': None,
+    "ntp": {
+        "check_exe": "ntpd",
+        "confpath": NTP_CONF,
+        "packages": ["ntp"],
+        "service_name": "ntp",
+        "template_name": "ntp.conf.{distro}",
+        "template": None,
     },
-    'ntpdate': {
-        'check_exe': 'ntpdate',
-        'confpath': NTP_CONF,
-        'packages': ['ntpdate'],
-        'service_name': 'ntpdate',
-        'template_name': 'ntp.conf.{distro}',
-        'template': None,
+    "ntpdate": {
+        "check_exe": "ntpdate",
+        "confpath": NTP_CONF,
+        "packages": ["ntpdate"],
+        "service_name": "ntpdate",
+        "template_name": "ntp.conf.{distro}",
+        "template": None,
     },
-    'systemd-timesyncd': {
-        'check_exe': '/lib/systemd/systemd-timesyncd',
-        'confpath': '/etc/systemd/timesyncd.conf.d/cloud-init.conf',
-        'packages': [],
-        'service_name': 'systemd-timesyncd',
-        'template_name': 'timesyncd.conf',
-        'template': None,
+    "systemd-timesyncd": {
+        "check_exe": "/lib/systemd/systemd-timesyncd",
+        "confpath": "/etc/systemd/timesyncd.conf.d/cloud-init.conf",
+        "packages": [],
+        "service_name": "systemd-timesyncd",
+        "template_name": "timesyncd.conf",
+        "template": None,
     },
 }
 
 # This is Distro-specific configuration overrides of the base config
 DISTRO_CLIENT_CONFIG = {
-    'alpine': {
-        'chrony': {
-            'confpath': '/etc/chrony/chrony.conf',
-            'service_name': 'chronyd',
+    "alpine": {
+        "chrony": {
+            "confpath": "/etc/chrony/chrony.conf",
+            "service_name": "chronyd",
         },
-        'ntp': {
-            'confpath': '/etc/ntp.conf',
-            'packages': [],
-            'service_name': 'ntpd',
+        "ntp": {
+            "confpath": "/etc/ntp.conf",
+            "packages": [],
+            "service_name": "ntpd",
         },
     },
-    'debian': {
-        'chrony': {
-            'confpath': '/etc/chrony/chrony.conf',
+    "debian": {
+        "chrony": {
+            "confpath": "/etc/chrony/chrony.conf",
         },
     },
-    'opensuse': {
-        'chrony': {
-            'service_name': 'chronyd',
+    "opensuse": {
+        "chrony": {
+            "service_name": "chronyd",
         },
-        'ntp': {
-            'confpath': '/etc/ntp.conf',
-            'service_name': 'ntpd',
+        "ntp": {
+            "confpath": "/etc/ntp.conf",
+            "service_name": "ntpd",
         },
-        'systemd-timesyncd': {
-            'check_exe': '/usr/lib/systemd/systemd-timesyncd',
+        "systemd-timesyncd": {
+            "check_exe": "/usr/lib/systemd/systemd-timesyncd",
         },
     },
-    'photon': {
-        'chrony': {
-            'service_name': 'chronyd',
+    "photon": {
+        "chrony": {
+            "service_name": "chronyd",
         },
-        'ntp': {
-            'service_name': 'ntpd',
-            'confpath': '/etc/ntp.conf'
-        },
-        'systemd-timesyncd': {
-            'check_exe': '/usr/lib/systemd/systemd-timesyncd',
-            'confpath': '/etc/systemd/timesyncd.conf',
+        "ntp": {"service_name": "ntpd", "confpath": "/etc/ntp.conf"},
+        "systemd-timesyncd": {
+            "check_exe": "/usr/lib/systemd/systemd-timesyncd",
+            "confpath": "/etc/systemd/timesyncd.conf",
         },
     },
-    'rhel': {
-        'ntp': {
-            'service_name': 'ntpd',
+    "rhel": {
+        "ntp": {
+            "service_name": "ntpd",
         },
-        'chrony': {
-            'service_name': 'chronyd',
+        "chrony": {
+            "service_name": "chronyd",
         },
     },
-    'sles': {
-        'chrony': {
-            'service_name': 'chronyd',
+    "sles": {
+        "chrony": {
+            "service_name": "chronyd",
         },
-        'ntp': {
-            'confpath': '/etc/ntp.conf',
-            'service_name': 'ntpd',
+        "ntp": {
+            "confpath": "/etc/ntp.conf",
+            "service_name": "ntpd",
         },
-        'systemd-timesyncd': {
-            'check_exe': '/usr/lib/systemd/systemd-timesyncd',
+        "systemd-timesyncd": {
+            "check_exe": "/usr/lib/systemd/systemd-timesyncd",
         },
     },
-    'ubuntu': {
-        'chrony': {
-            'confpath': '/etc/chrony/chrony.conf',
+    "ubuntu": {
+        "chrony": {
+            "confpath": "/etc/chrony/chrony.conf",
         },
     },
 }
@@ -141,10 +149,11 @@ DISTRO_CLIENT_CONFIG = {
 # configuration.
 
 meta = {
-    'id': 'cc_ntp',
-    'name': 'NTP',
-    'title': 'enable and configure ntp',
-    'description': dedent("""\
+    "id": "cc_ntp",
+    "name": "NTP",
+    "title": "enable and configure ntp",
+    "description": dedent(
+        """\
         Handle ntp configuration. If ntp is not installed on the system and
         ntp configuration is specified, ntp will be installed. If there is a
         default ntp config file in the image or one is present in the
@@ -152,16 +161,20 @@ meta = {
         appended to the filename before any changes are made. A list of ntp
         pools and ntp servers can be provided under the ``ntp`` config key.
         If no ntp ``servers`` or ``pools`` are provided, 4 pools will be used
-        in the format ``{0-3}.{distro}.pool.ntp.org``."""),
-    'distros': distros,
-    'examples': [
-        dedent("""\
+        in the format ``{0-3}.{distro}.pool.ntp.org``."""
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         # Override ntp with chrony configuration on Ubuntu
         ntp:
           enabled: true
           ntp_client: chrony  # Uses cloud-init default chrony configuration
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
         # Provide a custom ntp client configuration
         ntp:
           enabled: true
@@ -188,120 +201,137 @@ meta = {
           servers:
             - ntp.server.local
             - ntp.ubuntu.com
-            - 192.168.23.2""")],
-    'frequency': PER_INSTANCE,
+            - 192.168.23.2"""
+        ),
+    ],
+    "frequency": PER_INSTANCE,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'ntp': {
-            'type': ['object', 'null'],
-            'properties': {
-                'pools': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'string',
-                        'format': 'hostname'
-                    },
-                    'uniqueItems': True,
-                    'description': dedent("""\
+    "type": "object",
+    "properties": {
+        "ntp": {
+            "type": ["object", "null"],
+            "properties": {
+                "pools": {
+                    "type": "array",
+                    "items": {"type": "string", "format": "hostname"},
+                    "uniqueItems": True,
+                    "description": dedent(
+                        """\
                         List of ntp pools. If both pools and servers are
                         empty, 4 default pool servers will be provided of
                         the format ``{0-3}.{distro}.pool.ntp.org``. NOTE:
                         for Alpine Linux when using the Busybox NTP client
                         this setting will be ignored due to the limited
-                        functionality of Busybox's ntpd.""")
+                        functionality of Busybox's ntpd."""
+                    ),
                 },
-                'servers': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'string',
-                        'format': 'hostname'
-                    },
-                    'uniqueItems': True,
-                    'description': dedent("""\
+                "servers": {
+                    "type": "array",
+                    "items": {"type": "string", "format": "hostname"},
+                    "uniqueItems": True,
+                    "description": dedent(
+                        """\
                         List of ntp servers. If both pools and servers are
                         empty, 4 default pool servers will be provided with
-                        the format ``{0-3}.{distro}.pool.ntp.org``.""")
+                        the format ``{0-3}.{distro}.pool.ntp.org``."""
+                    ),
                 },
-                'ntp_client': {
-                    'type': 'string',
-                    'default': 'auto',
-                    'description': dedent("""\
+                "ntp_client": {
+                    "type": "string",
+                    "default": "auto",
+                    "description": dedent(
+                        """\
                         Name of an NTP client to use to configure system NTP.
                         When unprovided or 'auto' the default client preferred
                         by the distribution will be used. The following
                         built-in client names can be used to override existing
                         configuration defaults: chrony, ntp, ntpdate,
-                        systemd-timesyncd."""),
+                        systemd-timesyncd."""
+                    ),
                 },
-                'enabled': {
-                    'type': 'boolean',
-                    'default': True,
-                    'description': dedent("""\
+                "enabled": {
+                    "type": "boolean",
+                    "default": True,
+                    "description": dedent(
+                        """\
                         Attempt to enable ntp clients if set to True.  If set
                         to False, ntp client will not be configured or
-                        installed"""),
+                        installed"""
+                    ),
                 },
-                'config': {
-                    'description': dedent("""\
+                "config": {
+                    "description": dedent(
+                        """\
                         Configuration settings or overrides for the
-                        ``ntp_client`` specified."""),
-                    'type': ['object'],
-                    'properties': {
-                        'confpath': {
-                            'type': 'string',
-                            'description': dedent("""\
+                        ``ntp_client`` specified."""
+                    ),
+                    "type": ["object"],
+                    "properties": {
+                        "confpath": {
+                            "type": "string",
+                            "description": dedent(
+                                """\
                                 The path to where the ``ntp_client``
-                                configuration is written."""),
+                                configuration is written."""
+                            ),
                         },
-                        'check_exe': {
-                            'type': 'string',
-                            'description': dedent("""\
+                        "check_exe": {
+                            "type": "string",
+                            "description": dedent(
+                                """\
                                 The executable name for the ``ntp_client``.
                                 For example, ntp service ``check_exe`` is
-                                'ntpd' because it runs the ntpd binary."""),
+                                'ntpd' because it runs the ntpd binary."""
+                            ),
                         },
-                        'packages': {
-                            'type': 'array',
-                            'items': {
-                                'type': 'string',
+                        "packages": {
+                            "type": "array",
+                            "items": {
+                                "type": "string",
                             },
-                            'uniqueItems': True,
-                            'description': dedent("""\
+                            "uniqueItems": True,
+                            "description": dedent(
+                                """\
                                 List of packages needed to be installed for the
-                                selected ``ntp_client``."""),
+                                selected ``ntp_client``."""
+                            ),
                         },
-                        'service_name': {
-                            'type': 'string',
-                            'description': dedent("""\
+                        "service_name": {
+                            "type": "string",
+                            "description": dedent(
+                                """\
                                 The systemd or sysvinit service name used to
                                 start and stop the ``ntp_client``
-                                service."""),
+                                service."""
+                            ),
                         },
-                        'template': {
-                            'type': 'string',
-                            'description': dedent("""\
+                        "template": {
+                            "type": "string",
+                            "description": dedent(
+                                """\
                                 Inline template allowing users to define their
                                 own ``ntp_client`` configuration template.
                                 The value must start with '## template:jinja'
                                 to enable use of templating support.
-                                """),
+                                """
+                            ),
                         },
                     },
                     # Don't use REQUIRED_NTP_CONFIG_KEYS to allow for override
                     # of builtin client values.
-                    'minProperties': 1,  # If we have config, define something
-                    'additionalProperties': False
+                    "minProperties": 1,  # If we have config, define something
+                    "additionalProperties": False,
                 },
             },
-            'additionalProperties': False
+            "additionalProperties": False,
         }
-    }
+    },
 }
-REQUIRED_NTP_CONFIG_KEYS = frozenset([
-    'check_exe', 'confpath', 'packages', 'service_name'])
+REQUIRED_NTP_CONFIG_KEYS = frozenset(
+    ["check_exe", "confpath", "packages", "service_name"]
+)
 
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -334,21 +364,23 @@ def select_ntp_client(ntp_client, distro):
     distro_cfg = distro_ntp_client_configs(distro.name)
 
     # user specified client, return its config
-    if ntp_client and ntp_client != 'auto':
-        LOG.debug('Selected NTP client "%s" via user-data configuration',
-                  ntp_client)
+    if ntp_client and ntp_client != "auto":
+        LOG.debug(
+            'Selected NTP client "%s" via user-data configuration', ntp_client
+        )
         return distro_cfg.get(ntp_client, {})
 
     # default to auto if unset in distro
-    distro_ntp_client = distro.get_option('ntp_client', 'auto')
+    distro_ntp_client = distro.get_option("ntp_client", "auto")
 
     clientcfg = {}
     if distro_ntp_client == "auto":
         for client in distro.preferred_ntp_clients:
             cfg = distro_cfg.get(client)
-            if subp.which(cfg.get('check_exe')):
-                LOG.debug('Selected NTP client "%s", already installed',
-                          client)
+            if subp.which(cfg.get("check_exe")):
+                LOG.debug(
+                    'Selected NTP client "%s", already installed', client
+                )
                 clientcfg = cfg
                 break
 
@@ -356,11 +388,14 @@ def select_ntp_client(ntp_client, distro):
             client = distro.preferred_ntp_clients[0]
             LOG.debug(
                 'Selected distro preferred NTP client "%s", not yet installed',
-                client)
+                client,
+            )
             clientcfg = distro_cfg.get(client)
     else:
-        LOG.debug('Selected NTP client "%s" via distro system config',
-                  distro_ntp_client)
+        LOG.debug(
+            'Selected NTP client "%s" via distro system config',
+            distro_ntp_client,
+        )
         clientcfg = distro_cfg.get(distro_ntp_client, {})
 
     return clientcfg
@@ -378,7 +413,7 @@ def install_ntp_client(install_func, packages=None, check_exe="ntpd"):
     if subp.which(check_exe):
         return
     if packages is None:
-        packages = ['ntp']
+        packages = ["ntp"]
 
     install_func(packages)
 
@@ -403,25 +438,34 @@ def generate_server_names(distro):
     names = []
     pool_distro = distro
 
-    if distro == 'sles':
+    if distro == "sles":
         # For legal reasons x.pool.sles.ntp.org does not exist,
         # use the opensuse pool
-        pool_distro = 'opensuse'
-    elif distro == 'alpine' or distro == 'eurolinux':
+        pool_distro = "opensuse"
+    elif distro == "alpine" or distro == "eurolinux":
         # Alpine-specific pool (i.e. x.alpine.pool.ntp.org) does not exist
         # so use general x.pool.ntp.org instead. The same applies to EuroLinux
-        pool_distro = ''
+        pool_distro = ""
 
     for x in range(0, NR_POOL_SERVERS):
-        names.append(".".join(
-            [n for n in [str(x)] + [pool_distro] + ['pool.ntp.org'] if n]))
+        names.append(
+            ".".join(
+                [n for n in [str(x)] + [pool_distro] + ["pool.ntp.org"] if n]
+            )
+        )
 
     return names
 
 
-def write_ntp_config_template(distro_name, service_name=None, servers=None,
-                              pools=None, path=None, template_fn=None,
-                              template=None):
+def write_ntp_config_template(
+    distro_name,
+    service_name=None,
+    servers=None,
+    pools=None,
+    path=None,
+    template_fn=None,
+    template=None,
+):
     """Render a ntp client configuration for the specified client.
 
     @param distro_name: string.  The distro class name.
@@ -444,27 +488,30 @@ def write_ntp_config_template(distro_name, service_name=None, servers=None,
     if not pools:
         pools = []
 
-    if (len(servers) == 0 and distro_name == 'alpine' and
-            service_name == 'ntpd'):
+    if (
+        len(servers) == 0
+        and distro_name == "alpine"
+        and service_name == "ntpd"
+    ):
         # Alpine's Busybox ntpd only understands "servers" configuration
         # and not "pool" configuration.
         servers = generate_server_names(distro_name)
-        LOG.debug(
-            'Adding distro default ntp servers: %s', ','.join(servers))
+        LOG.debug("Adding distro default ntp servers: %s", ",".join(servers))
     elif len(servers) == 0 and len(pools) == 0:
         pools = generate_server_names(distro_name)
         LOG.debug(
-            'Adding distro default ntp pool servers: %s', ','.join(pools))
+            "Adding distro default ntp pool servers: %s", ",".join(pools)
+        )
 
     if not path:
-        raise ValueError('Invalid value for path parameter')
+        raise ValueError("Invalid value for path parameter")
 
     if not template_fn and not template:
-        raise ValueError('Not template_fn or template provided')
+        raise ValueError("Not template_fn or template provided")
 
-    params = {'servers': servers, 'pools': pools}
+    params = {"servers": servers, "pools": pools}
     if template:
-        tfile = temp_utils.mkstemp(prefix='template_name-', suffix=".tmpl")
+        tfile = temp_utils.mkstemp(prefix="template_name-", suffix=".tmpl")
         template_fn = tfile[1]  # filepath is second item in tuple
         util.write_file(template_fn, content=template)
 
@@ -487,50 +534,62 @@ def supplemental_schema_validation(ntp_config):
     errors = []
     missing = REQUIRED_NTP_CONFIG_KEYS.difference(set(ntp_config.keys()))
     if missing:
-        keys = ', '.join(sorted(missing))
+        keys = ", ".join(sorted(missing))
         errors.append(
-            'Missing required ntp:config keys: {keys}'.format(keys=keys))
-    elif not any([ntp_config.get('template'),
-                  ntp_config.get('template_name')]):
+            "Missing required ntp:config keys: {keys}".format(keys=keys)
+        )
+    elif not any(
+        [ntp_config.get("template"), ntp_config.get("template_name")]
+    ):
         errors.append(
-            'Either ntp:config:template or ntp:config:template_name values'
-            ' are required')
+            "Either ntp:config:template or ntp:config:template_name values"
+            " are required"
+        )
     for key, value in sorted(ntp_config.items()):
-        keypath = 'ntp:config:' + key
-        if key == 'confpath':
+        keypath = "ntp:config:" + key
+        if key == "confpath":
             if not all([value, isinstance(value, str)]):
                 errors.append(
-                    'Expected a config file path {keypath}.'
-                    ' Found ({value})'.format(keypath=keypath, value=value))
-        elif key == 'packages':
+                    "Expected a config file path {keypath}."
+                    " Found ({value})".format(keypath=keypath, value=value)
+                )
+        elif key == "packages":
             if not isinstance(value, list):
                 errors.append(
-                    'Expected a list of required package names for {keypath}.'
-                    ' Found ({value})'.format(keypath=keypath, value=value))
-        elif key in ('template', 'template_name'):
+                    "Expected a list of required package names for {keypath}."
+                    " Found ({value})".format(keypath=keypath, value=value)
+                )
+        elif key in ("template", "template_name"):
             if value is None:  # Either template or template_name can be none
                 continue
             if not isinstance(value, str):
                 errors.append(
-                    'Expected a string type for {keypath}.'
-                    ' Found ({value})'.format(keypath=keypath, value=value))
+                    "Expected a string type for {keypath}."
+                    " Found ({value})".format(keypath=keypath, value=value)
+                )
         elif not isinstance(value, str):
             errors.append(
-                'Expected a string type for {keypath}.'
-                ' Found ({value})'.format(keypath=keypath, value=value))
+                "Expected a string type for {keypath}. Found ({value})".format(
+                    keypath=keypath, value=value
+                )
+            )
 
     if errors:
-        raise ValueError(r'Invalid ntp configuration:\n{errors}'.format(
-            errors='\n'.join(errors)))
+        raise ValueError(
+            r"Invalid ntp configuration:\n{errors}".format(
+                errors="\n".join(errors)
+            )
+        )
 
 
 def handle(name, cfg, cloud, log, _args):
     """Enable and configure ntp."""
-    if 'ntp' not in cfg:
+    if "ntp" not in cfg:
         LOG.debug(
-            "Skipping module named %s, not present or disabled by cfg", name)
+            "Skipping module named %s, not present or disabled by cfg", name
+        )
         return
-    ntp_cfg = cfg['ntp']
+    ntp_cfg = cfg["ntp"]
     if ntp_cfg is None:
         ntp_cfg = {}  # Allow empty config which will install the package
 
@@ -538,52 +597,61 @@ def handle(name, cfg, cloud, log, _args):
     if not isinstance(ntp_cfg, (dict)):
         raise RuntimeError(
             "'ntp' key existed in config, but not a dictionary type,"
-            " is a {_type} instead".format(_type=type_utils.obj_name(ntp_cfg)))
+            " is a {_type} instead".format(_type=type_utils.obj_name(ntp_cfg))
+        )
 
     validate_cloudconfig_schema(cfg, schema)
 
     # Allow users to explicitly enable/disable
-    enabled = ntp_cfg.get('enabled', True)
+    enabled = ntp_cfg.get("enabled", True)
     if util.is_false(enabled):
         LOG.debug("Skipping module named %s, disabled by cfg", name)
         return
 
     # Select which client is going to be used and get the configuration
-    ntp_client_config = select_ntp_client(ntp_cfg.get('ntp_client'),
-                                          cloud.distro)
+    ntp_client_config = select_ntp_client(
+        ntp_cfg.get("ntp_client"), cloud.distro
+    )
     # Allow user ntp config to override distro configurations
     ntp_client_config = util.mergemanydict(
-        [ntp_client_config, ntp_cfg.get('config', {})], reverse=True)
+        [ntp_client_config, ntp_cfg.get("config", {})], reverse=True
+    )
 
     supplemental_schema_validation(ntp_client_config)
-    rename_ntp_conf(confpath=ntp_client_config.get('confpath'))
+    rename_ntp_conf(confpath=ntp_client_config.get("confpath"))
 
     template_fn = None
-    if not ntp_client_config.get('template'):
-        template_name = (
-            ntp_client_config.get('template_name').replace('{distro}',
-                                                           cloud.distro.name))
+    if not ntp_client_config.get("template"):
+        template_name = ntp_client_config.get("template_name").replace(
+            "{distro}", cloud.distro.name
+        )
         template_fn = cloud.get_template_filename(template_name)
         if not template_fn:
-            msg = ('No template found, not rendering %s' %
-                   ntp_client_config.get('template_name'))
+            msg = (
+                "No template found, not rendering %s"
+                % ntp_client_config.get("template_name")
+            )
             raise RuntimeError(msg)
 
-    write_ntp_config_template(cloud.distro.name,
-                              service_name=ntp_client_config.get(
-                                  'service_name'),
-                              servers=ntp_cfg.get('servers', []),
-                              pools=ntp_cfg.get('pools', []),
-                              path=ntp_client_config.get('confpath'),
-                              template_fn=template_fn,
-                              template=ntp_client_config.get('template'))
-
-    install_ntp_client(cloud.distro.install_packages,
-                       packages=ntp_client_config['packages'],
-                       check_exe=ntp_client_config['check_exe'])
+    write_ntp_config_template(
+        cloud.distro.name,
+        service_name=ntp_client_config.get("service_name"),
+        servers=ntp_cfg.get("servers", []),
+        pools=ntp_cfg.get("pools", []),
+        path=ntp_client_config.get("confpath"),
+        template_fn=template_fn,
+        template=ntp_client_config.get("template"),
+    )
+
+    install_ntp_client(
+        cloud.distro.install_packages,
+        packages=ntp_client_config["packages"],
+        check_exe=ntp_client_config["check_exe"],
+    )
     try:
-        cloud.distro.manage_service('reload',
-                                    ntp_client_config.get('service_name'))
+        cloud.distro.manage_service(
+            "reload", ntp_client_config.get("service_name")
+        )
     except subp.ProcessExecutionError as e:
         LOG.exception("Failed to reload/start ntp service: %s", e)
         raise
diff --git a/cloudinit/config/cc_package_update_upgrade_install.py b/cloudinit/config/cc_package_update_upgrade_install.py
index 036baf85..14cdfab8 100644
--- a/cloudinit/config/cc_package_update_upgrade_install.py
+++ b/cloudinit/config/cc_package_update_upgrade_install.py
@@ -43,8 +43,7 @@ import os
 import time
 
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 REBOOT_FILE = "/var/run/reboot-required"
 REBOOT_CMD = ["/sbin/reboot"]
@@ -68,17 +67,19 @@ def _fire_reboot(log, wait_attempts=6, initial_sleep=1, backoff=2):
         log.debug("Rebooted, but still running after %s seconds", int(elapsed))
     # If we got here, not good
     elapsed = time.time() - start
-    raise RuntimeError(("Reboot did not happen"
-                        " after %s seconds!") % (int(elapsed)))
+    raise RuntimeError(
+        "Reboot did not happen after %s seconds!" % (int(elapsed))
+    )
 
 
 def handle(_name, cfg, cloud, log, _args):
     # Handle the old style + new config names
-    update = _multi_cfg_bool_get(cfg, 'apt_update', 'package_update')
-    upgrade = _multi_cfg_bool_get(cfg, 'package_upgrade', 'apt_upgrade')
-    reboot_if_required = _multi_cfg_bool_get(cfg, 'apt_reboot_if_required',
-                                             'package_reboot_if_required')
-    pkglist = util.get_cfg_option_list(cfg, 'packages', [])
+    update = _multi_cfg_bool_get(cfg, "apt_update", "package_update")
+    upgrade = _multi_cfg_bool_get(cfg, "package_upgrade", "apt_upgrade")
+    reboot_if_required = _multi_cfg_bool_get(
+        cfg, "apt_reboot_if_required", "package_reboot_if_required"
+    )
+    pkglist = util.get_cfg_option_list(cfg, "packages", [])
 
     errors = []
     if update or len(pkglist) or upgrade:
@@ -109,8 +110,9 @@ def handle(_name, cfg, cloud, log, _args):
     reboot_fn_exists = os.path.isfile(REBOOT_FILE)
     if (upgrade or pkglist) and reboot_if_required and reboot_fn_exists:
         try:
-            log.warning("Rebooting after upgrade or install per "
-                        "%s", REBOOT_FILE)
+            log.warning(
+                "Rebooting after upgrade or install per %s", REBOOT_FILE
+            )
             # Flush the above warning + anything else out...
             logging.flushLoggers(log)
             _fire_reboot(log)
@@ -119,8 +121,10 @@ def handle(_name, cfg, cloud, log, _args):
             errors.append(e)
 
     if len(errors):
-        log.warning("%s failed with exceptions, re-raising the last one",
-                    len(errors))
+        log.warning(
+            "%s failed with exceptions, re-raising the last one", len(errors)
+        )
         raise errors[-1]
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_phone_home.py b/cloudinit/config/cc_phone_home.py
index 733c3910..cc1fe53e 100644
--- a/cloudinit/config/cc_phone_home.py
+++ b/cloudinit/config/cc_phone_home.py
@@ -41,22 +41,19 @@ keys to post. Available keys are:
         tries: 10
 """
 
-from cloudinit import templater
-from cloudinit import url_helper
-from cloudinit import util
-
+from cloudinit import templater, url_helper, util
 from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
 
 POST_LIST_ALL = [
-    'pub_key_dsa',
-    'pub_key_rsa',
-    'pub_key_ecdsa',
-    'pub_key_ed25519',
-    'instance_id',
-    'hostname',
-    'fqdn'
+    "pub_key_dsa",
+    "pub_key_rsa",
+    "pub_key_ecdsa",
+    "pub_key_ed25519",
+    "instance_id",
+    "hostname",
+    "fqdn",
 ]
 
 
@@ -74,48 +71,58 @@ def handle(name, cfg, cloud, log, args):
     if len(args) != 0:
         ph_cfg = util.read_conf(args[0])
     else:
-        if 'phone_home' not in cfg:
-            log.debug(("Skipping module named %s, "
-                       "no 'phone_home' configuration found"), name)
+        if "phone_home" not in cfg:
+            log.debug(
+                "Skipping module named %s, "
+                "no 'phone_home' configuration found",
+                name,
+            )
             return
-        ph_cfg = cfg['phone_home']
-
-    if 'url' not in ph_cfg:
-        log.warning(("Skipping module named %s, "
-                     "no 'url' found in 'phone_home' configuration"), name)
+        ph_cfg = cfg["phone_home"]
+
+    if "url" not in ph_cfg:
+        log.warning(
+            "Skipping module named %s, "
+            "no 'url' found in 'phone_home' configuration",
+            name,
+        )
         return
 
-    url = ph_cfg['url']
-    post_list = ph_cfg.get('post', 'all')
-    tries = ph_cfg.get('tries')
+    url = ph_cfg["url"]
+    post_list = ph_cfg.get("post", "all")
+    tries = ph_cfg.get("tries")
     try:
         tries = int(tries)
     except Exception:
         tries = 10
-        util.logexc(log, "Configuration entry 'tries' is not an integer, "
-                         "using %s instead", tries)
+        util.logexc(
+            log,
+            "Configuration entry 'tries' is not an integer, using %s instead",
+            tries,
+        )
 
     if post_list == "all":
         post_list = POST_LIST_ALL
 
     all_keys = {}
-    all_keys['instance_id'] = cloud.get_instance_id()
-    all_keys['hostname'] = cloud.get_hostname()
-    all_keys['fqdn'] = cloud.get_hostname(fqdn=True)
+    all_keys["instance_id"] = cloud.get_instance_id()
+    all_keys["hostname"] = cloud.get_hostname()
+    all_keys["fqdn"] = cloud.get_hostname(fqdn=True)
 
     pubkeys = {
-        'pub_key_dsa': '/etc/ssh/ssh_host_dsa_key.pub',
-        'pub_key_rsa': '/etc/ssh/ssh_host_rsa_key.pub',
-        'pub_key_ecdsa': '/etc/ssh/ssh_host_ecdsa_key.pub',
-        'pub_key_ed25519': '/etc/ssh/ssh_host_ed25519_key.pub',
+        "pub_key_dsa": "/etc/ssh/ssh_host_dsa_key.pub",
+        "pub_key_rsa": "/etc/ssh/ssh_host_rsa_key.pub",
+        "pub_key_ecdsa": "/etc/ssh/ssh_host_ecdsa_key.pub",
+        "pub_key_ed25519": "/etc/ssh/ssh_host_ed25519_key.pub",
     }
 
     for (n, path) in pubkeys.items():
         try:
             all_keys[n] = util.load_file(path)
         except Exception:
-            util.logexc(log, "%s: failed to open, can not phone home that "
-                             "data!", path)
+            util.logexc(
+                log, "%s: failed to open, can not phone home that data!", path
+            )
 
     submit_keys = {}
     for k in post_list:
@@ -123,28 +130,37 @@ def handle(name, cfg, cloud, log, args):
             submit_keys[k] = all_keys[k]
         else:
             submit_keys[k] = None
-            log.warning(("Requested key %s from 'post'"
-                         " configuration list not available"), k)
+            log.warning(
+                "Requested key %s from 'post'"
+                " configuration list not available",
+                k,
+            )
 
     # Get them read to be posted
     real_submit_keys = {}
     for (k, v) in submit_keys.items():
         if v is None:
-            real_submit_keys[k] = 'N/A'
+            real_submit_keys[k] = "N/A"
         else:
             real_submit_keys[k] = str(v)
 
     # Incase the url is parameterized
     url_params = {
-        'INSTANCE_ID': all_keys['instance_id'],
+        "INSTANCE_ID": all_keys["instance_id"],
     }
     url = templater.render_string(url, url_params)
     try:
         url_helper.read_file_or_url(
-            url, data=real_submit_keys, retries=tries, sec_between=3,
-            ssl_details=util.fetch_ssl_details(cloud.paths))
+            url,
+            data=real_submit_keys,
+            retries=tries,
+            sec_between=3,
+            ssl_details=util.fetch_ssl_details(cloud.paths),
+        )
     except Exception:
-        util.logexc(log, "Failed to post phone home data to %s in %s tries",
-                    url, tries)
+        util.logexc(
+            log, "Failed to post phone home data to %s in %s tries", url, tries
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_power_state_change.py b/cloudinit/config/cc_power_state_change.py
index 5780a7e9..d4eb68c0 100644
--- a/cloudinit/config/cc_power_state_change.py
+++ b/cloudinit/config/cc_power_state_change.py
@@ -58,9 +58,8 @@ import re
 import subprocess
 import time
 
+from cloudinit import subp, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import subp
-from cloudinit import util
 
 frequency = PER_INSTANCE
 
@@ -75,9 +74,9 @@ def givecmdline(pid):
         #   PID COMM             ARGS
         #     1 init             /bin/init --
         if util.is_FreeBSD():
-            (output, _err) = subp.subp(['procstat', '-c', str(pid)])
+            (output, _err) = subp.subp(["procstat", "-c", str(pid)])
             line = output.splitlines()[1]
-            m = re.search(r'\d+ (\w|\.|-)+\s+(/\w.+)', line)
+            m = re.search(r"\d+ (\w|\.|-)+\s+(/\w.+)", line)
             return m.group(2)
         else:
             return util.load_file("/proc/%s/cmdline" % pid)
@@ -106,8 +105,9 @@ def check_condition(cond, log=None):
             return False
         else:
             if log:
-                log.warning(pre + "unexpected exit %s. " % ret +
-                            "do not apply change.")
+                log.warning(
+                    pre + "unexpected exit %s. " % ret + "do not apply change."
+                )
             return False
     except Exception as e:
         if log:
@@ -138,16 +138,24 @@ def handle(_name, cfg, cloud, log, _args):
 
     devnull_fp = open(os.devnull, "w")
 
-    log.debug("After pid %s ends, will execute: %s" % (mypid, ' '.join(args)))
+    log.debug("After pid %s ends, will execute: %s" % (mypid, " ".join(args)))
 
-    util.fork_cb(run_after_pid_gone, mypid, cmdline, timeout, log,
-                 condition, execmd, [args, devnull_fp])
+    util.fork_cb(
+        run_after_pid_gone,
+        mypid,
+        cmdline,
+        timeout,
+        log,
+        condition,
+        execmd,
+        [args, devnull_fp],
+    )
 
 
 def load_power_state(cfg, distro):
     # returns a tuple of shutdown_command, timeout
     # shutdown_command is None if no config found
-    pstate = cfg.get('power_state')
+    pstate = cfg.get("power_state")
 
     if pstate is None:
         return (None, None, None)
@@ -155,22 +163,25 @@ def load_power_state(cfg, distro):
     if not isinstance(pstate, dict):
         raise TypeError("power_state is not a dict.")
 
-    modes_ok = ['halt', 'poweroff', 'reboot']
+    modes_ok = ["halt", "poweroff", "reboot"]
     mode = pstate.get("mode")
     if mode not in distro.shutdown_options_map:
         raise TypeError(
-            "power_state[mode] required, must be one of: %s. found: '%s'." %
-            (','.join(modes_ok), mode))
+            "power_state[mode] required, must be one of: %s. found: '%s'."
+            % (",".join(modes_ok), mode)
+        )
 
-    args = distro.shutdown_command(mode=mode,
-                                   delay=pstate.get("delay", "now"),
-                                   message=pstate.get("message"))
+    args = distro.shutdown_command(
+        mode=mode,
+        delay=pstate.get("delay", "now"),
+        message=pstate.get("message"),
+    )
 
     try:
-        timeout = float(pstate.get('timeout', 30.0))
+        timeout = float(pstate.get("timeout", 30.0))
     except ValueError as e:
         raise ValueError(
-            "failed to convert timeout '%s' to float." % pstate['timeout']
+            "failed to convert timeout '%s' to float." % pstate["timeout"]
         ) from e
 
     condition = pstate.get("condition", True)
@@ -186,8 +197,12 @@ def doexit(sysexit):
 def execmd(exe_args, output=None, data_in=None):
     ret = 1
     try:
-        proc = subprocess.Popen(exe_args, stdin=subprocess.PIPE,
-                                stdout=output, stderr=subprocess.STDOUT)
+        proc = subprocess.Popen(
+            exe_args,
+            stdin=subprocess.PIPE,
+            stdout=output,
+            stderr=subprocess.STDOUT,
+        )
         proc.communicate(data_in)
         ret = proc.returncode
     except Exception:
@@ -230,7 +245,7 @@ def run_after_pid_gone(pid, pidcmdline, timeout, log, condition, func, args):
         except Exception as e:
             fatal("Unexpected Exception: %s" % e)
 
-        time.sleep(.25)
+        time.sleep(0.25)
 
     if not msg:
         fatal("Unexpected error in run_after_pid_gone")
@@ -246,4 +261,5 @@ def run_after_pid_gone(pid, pidcmdline, timeout, log, condition, func, args):
 
     func(*args)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_puppet.py b/cloudinit/config/cc_puppet.py
index dc20fc44..f51f49bc 100644
--- a/cloudinit/config/cc_puppet.py
+++ b/cloudinit/config/cc_puppet.py
@@ -108,23 +108,20 @@ key (by default the agent will execute with the ``--test`` flag).
 
 import os
 import socket
-import yaml
 from io import StringIO
 
-from cloudinit import helpers
-from cloudinit import subp
-from cloudinit import temp_utils
-from cloudinit import util
-from cloudinit import url_helper
+import yaml
 
-AIO_INSTALL_URL = 'https://raw.githubusercontent.com/puppetlabs/install-puppet/main/install.sh'  # noqa: E501
-PUPPET_AGENT_DEFAULT_ARGS = ['--test']
+from cloudinit import helpers, subp, temp_utils, url_helper, util
 
+AIO_INSTALL_URL = "https://raw.githubusercontent.com/puppetlabs/install-puppet/main/install.sh"  # noqa: E501
+PUPPET_AGENT_DEFAULT_ARGS = ["--test"]
 
-class PuppetConstants(object):
 
-    def __init__(self, puppet_conf_file, puppet_ssl_dir,
-                 csr_attributes_path, log):
+class PuppetConstants(object):
+    def __init__(
+        self, puppet_conf_file, puppet_ssl_dir, csr_attributes_path, log
+    ):
         self.conf_path = puppet_conf_file
         self.ssl_dir = puppet_ssl_dir
         self.ssl_cert_dir = os.path.join(puppet_ssl_dir, "certs")
@@ -134,18 +131,27 @@ class PuppetConstants(object):
 
 def _autostart_puppet(log):
     # Set puppet to automatically start
-    if os.path.exists('/etc/default/puppet'):
-        subp.subp(['sed', '-i',
-                   '-e', 's/^START=.*/START=yes/',
-                   '/etc/default/puppet'], capture=False)
-    elif os.path.exists('/bin/systemctl'):
-        subp.subp(['/bin/systemctl', 'enable', 'puppet.service'],
-                  capture=False)
-    elif os.path.exists('/sbin/chkconfig'):
-        subp.subp(['/sbin/chkconfig', 'puppet', 'on'], capture=False)
+    if os.path.exists("/etc/default/puppet"):
+        subp.subp(
+            [
+                "sed",
+                "-i",
+                "-e",
+                "s/^START=.*/START=yes/",
+                "/etc/default/puppet",
+            ],
+            capture=False,
+        )
+    elif os.path.exists("/bin/systemctl"):
+        subp.subp(
+            ["/bin/systemctl", "enable", "puppet.service"], capture=False
+        )
+    elif os.path.exists("/sbin/chkconfig"):
+        subp.subp(["/sbin/chkconfig", "puppet", "on"], capture=False)
     else:
-        log.warning(("Sorry we do not know how to enable"
-                     " puppet services on this system"))
+        log.warning(
+            "Sorry we do not know how to enable puppet services on this system"
+        )
 
 
 def get_config_value(puppet_bin, setting):
@@ -153,12 +159,13 @@ def get_config_value(puppet_bin, setting):
     :param puppet_bin: path to puppet binary
     :param setting: setting to query
     """
-    out, _ = subp.subp([puppet_bin, 'config', 'print', setting])
+    out, _ = subp.subp([puppet_bin, "config", "print", setting])
     return out.rstrip()
 
 
-def install_puppet_aio(url=AIO_INSTALL_URL, version=None,
-                       collection=None, cleanup=True):
+def install_puppet_aio(
+    url=AIO_INSTALL_URL, version=None, collection=None, cleanup=True
+):
     """Install puppet-agent from the puppetlabs repositories using the one-shot
     shell script
 
@@ -169,62 +176,70 @@ def install_puppet_aio(url=AIO_INSTALL_URL, version=None,
     """
     args = []
     if version is not None:
-        args = ['-v', version]
+        args = ["-v", version]
     if collection is not None:
-        args += ['-c', collection]
+        args += ["-c", collection]
 
     # Purge puppetlabs repos after installation
     if cleanup:
-        args += ['--cleanup']
+        args += ["--cleanup"]
     content = url_helper.readurl(url=url, retries=5).contents
 
     # Use tmpdir over tmpfile to avoid 'text file busy' on execute
     with temp_utils.tempdir(needs_exe=True) as tmpd:
-        tmpf = os.path.join(tmpd, 'puppet-install')
+        tmpf = os.path.join(tmpd, "puppet-install")
         util.write_file(tmpf, content, mode=0o700)
         return subp.subp([tmpf] + args, capture=False)
 
 
 def handle(name, cfg, cloud, log, _args):
     # If there isn't a puppet key in the configuration don't do anything
-    if 'puppet' not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'puppet' configuration found"), name)
+    if "puppet" not in cfg:
+        log.debug(
+            "Skipping module named %s, no 'puppet' configuration found", name
+        )
         return
 
-    puppet_cfg = cfg['puppet']
+    puppet_cfg = cfg["puppet"]
     # Start by installing the puppet package if necessary...
-    install = util.get_cfg_option_bool(puppet_cfg, 'install', True)
-    version = util.get_cfg_option_str(puppet_cfg, 'version', None)
-    collection = util.get_cfg_option_str(puppet_cfg, 'collection', None)
+    install = util.get_cfg_option_bool(puppet_cfg, "install", True)
+    version = util.get_cfg_option_str(puppet_cfg, "version", None)
+    collection = util.get_cfg_option_str(puppet_cfg, "collection", None)
     install_type = util.get_cfg_option_str(
-        puppet_cfg, 'install_type', 'packages')
-    cleanup = util.get_cfg_option_bool(puppet_cfg, 'cleanup', True)
-    run = util.get_cfg_option_bool(puppet_cfg, 'exec', default=False)
-    start_puppetd = util.get_cfg_option_bool(puppet_cfg,
-                                             'start_service',
-                                             default=True)
+        puppet_cfg, "install_type", "packages"
+    )
+    cleanup = util.get_cfg_option_bool(puppet_cfg, "cleanup", True)
+    run = util.get_cfg_option_bool(puppet_cfg, "exec", default=False)
+    start_puppetd = util.get_cfg_option_bool(
+        puppet_cfg, "start_service", default=True
+    )
     aio_install_url = util.get_cfg_option_str(
-        puppet_cfg, 'aio_install_url', default=AIO_INSTALL_URL)
+        puppet_cfg, "aio_install_url", default=AIO_INSTALL_URL
+    )
 
     # AIO and distro packages use different paths
-    if install_type == 'aio':
-        puppet_user = 'root'
-        puppet_bin = '/opt/puppetlabs/bin/puppet'
-        puppet_package = 'puppet-agent'
+    if install_type == "aio":
+        puppet_user = "root"
+        puppet_bin = "/opt/puppetlabs/bin/puppet"
+        puppet_package = "puppet-agent"
     else:  # default to 'packages'
-        puppet_user = 'puppet'
-        puppet_bin = 'puppet'
-        puppet_package = 'puppet'
+        puppet_user = "puppet"
+        puppet_bin = "puppet"
+        puppet_package = "puppet"
 
     package_name = util.get_cfg_option_str(
-        puppet_cfg, 'package_name', puppet_package)
+        puppet_cfg, "package_name", puppet_package
+    )
     if not install and version:
-        log.warning(("Puppet install set to false but version supplied,"
-                     " doing nothing."))
+        log.warning(
+            "Puppet install set to false but version supplied, doing nothing."
+        )
     elif install:
-        log.debug(("Attempting to install puppet %s from %s"),
-                  version if version else 'latest', install_type)
+        log.debug(
+            "Attempting to install puppet %s from %s",
+            version if version else "latest",
+            install_type,
+        )
 
         if install_type == "packages":
             cloud.distro.install_packages((package_name, version))
@@ -235,17 +250,21 @@ def handle(name, cfg, cloud, log, _args):
             run = False
 
     conf_file = util.get_cfg_option_str(
-        puppet_cfg, 'conf_file', get_config_value(puppet_bin, 'config'))
+        puppet_cfg, "conf_file", get_config_value(puppet_bin, "config")
+    )
     ssl_dir = util.get_cfg_option_str(
-        puppet_cfg, 'ssl_dir', get_config_value(puppet_bin, 'ssldir'))
+        puppet_cfg, "ssl_dir", get_config_value(puppet_bin, "ssldir")
+    )
     csr_attributes_path = util.get_cfg_option_str(
-        puppet_cfg, 'csr_attributes_path',
-        get_config_value(puppet_bin, 'csr_attributes'))
+        puppet_cfg,
+        "csr_attributes_path",
+        get_config_value(puppet_bin, "csr_attributes"),
+    )
 
     p_constants = PuppetConstants(conf_file, ssl_dir, csr_attributes_path, log)
 
     # ... and then update the puppet configuration
-    if 'conf' in puppet_cfg:
+    if "conf" in puppet_cfg:
         # Add all sections from the conf object to puppet.conf
         contents = util.load_file(p_constants.conf_path)
         # Create object for reading puppet.conf values
@@ -254,30 +273,31 @@ def handle(name, cfg, cloud, log, _args):
         # mix the rest up. First clean them up
         # (TODO(harlowja) is this really needed??)
         cleaned_lines = [i.lstrip() for i in contents.splitlines()]
-        cleaned_contents = '\n'.join(cleaned_lines)
+        cleaned_contents = "\n".join(cleaned_lines)
         # Move to puppet_config.read_file when dropping py2.7
         puppet_config.read_file(
-            StringIO(cleaned_contents),
-            source=p_constants.conf_path)
-        for (cfg_name, cfg) in puppet_cfg['conf'].items():
+            StringIO(cleaned_contents), source=p_constants.conf_path
+        )
+        for (cfg_name, cfg) in puppet_cfg["conf"].items():
             # Cert configuration is a special case
             # Dump the puppetserver ca certificate in the correct place
-            if cfg_name == 'ca_cert':
+            if cfg_name == "ca_cert":
                 # Puppet ssl sub-directory isn't created yet
                 # Create it with the proper permissions and ownership
                 util.ensure_dir(p_constants.ssl_dir, 0o771)
-                util.chownbyname(p_constants.ssl_dir, puppet_user, 'root')
+                util.chownbyname(p_constants.ssl_dir, puppet_user, "root")
                 util.ensure_dir(p_constants.ssl_cert_dir)
 
-                util.chownbyname(p_constants.ssl_cert_dir, puppet_user, 'root')
+                util.chownbyname(p_constants.ssl_cert_dir, puppet_user, "root")
                 util.write_file(p_constants.ssl_cert_path, cfg)
-                util.chownbyname(p_constants.ssl_cert_path,
-                                 puppet_user, 'root')
+                util.chownbyname(
+                    p_constants.ssl_cert_path, puppet_user, "root"
+                )
             else:
                 # Iterate through the config items, we'll use ConfigParser.set
                 # to overwrite or create new items as needed
                 for (o, v) in cfg.items():
-                    if o == 'certname':
+                    if o == "certname":
                         # Expand %f as the fqdn
                         # TODO(harlowja) should this use the cloud fqdn??
                         v = v.replace("%f", socket.getfqdn())
@@ -288,14 +308,16 @@ def handle(name, cfg, cloud, log, _args):
                     puppet_config.set(cfg_name, o, v)
             # We got all our config as wanted we'll rename
             # the previous puppet.conf and create our new one
-            util.rename(p_constants.conf_path, "%s.old"
-                        % (p_constants.conf_path))
+            util.rename(
+                p_constants.conf_path, "%s.old" % (p_constants.conf_path)
+            )
             util.write_file(p_constants.conf_path, puppet_config.stringify())
 
-    if 'csr_attributes' in puppet_cfg:
-        util.write_file(p_constants.csr_attributes_path,
-                        yaml.dump(puppet_cfg['csr_attributes'],
-                                  default_flow_style=False))
+    if "csr_attributes" in puppet_cfg:
+        util.write_file(
+            p_constants.csr_attributes_path,
+            yaml.dump(puppet_cfg["csr_attributes"], default_flow_style=False),
+        )
 
     # Set it up so it autostarts
     if start_puppetd:
@@ -303,18 +325,21 @@ def handle(name, cfg, cloud, log, _args):
 
     # Run the agent if needed
     if run:
-        log.debug('Running puppet-agent')
-        cmd = [puppet_bin, 'agent']
-        if 'exec_args' in puppet_cfg:
-            cmd_args = puppet_cfg['exec_args']
+        log.debug("Running puppet-agent")
+        cmd = [puppet_bin, "agent"]
+        if "exec_args" in puppet_cfg:
+            cmd_args = puppet_cfg["exec_args"]
             if isinstance(cmd_args, (list, tuple)):
                 cmd.extend(cmd_args)
             elif isinstance(cmd_args, str):
                 cmd.extend(cmd_args.split())
             else:
-                log.warning("Unknown type %s provided for puppet"
-                            " 'exec_args' expected list, tuple,"
-                            " or string", type(cmd_args))
+                log.warning(
+                    "Unknown type %s provided for puppet"
+                    " 'exec_args' expected list, tuple,"
+                    " or string",
+                    type(cmd_args),
+                )
                 cmd.extend(PUPPET_AGENT_DEFAULT_ARGS)
         else:
             cmd.extend(PUPPET_AGENT_DEFAULT_ARGS)
@@ -322,6 +347,7 @@ def handle(name, cfg, cloud, log, _args):
 
     if start_puppetd:
         # Start puppetd
-        subp.subp(['service', 'puppet', 'start'], capture=False)
+        subp.subp(["service", "puppet", "start"], capture=False)
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_refresh_rmc_and_interface.py b/cloudinit/config/cc_refresh_rmc_and_interface.py
index d5e0ecb2..87be5348 100644
--- a/cloudinit/config/cc_refresh_rmc_and_interface.py
+++ b/cloudinit/config/cc_refresh_rmc_and_interface.py
@@ -34,20 +34,18 @@ This module handles
 
 """
 
+import errno
+
 from cloudinit import log as logging
+from cloudinit import netinfo, subp, util
 from cloudinit.settings import PER_ALWAYS
-from cloudinit import util
-from cloudinit import subp
-from cloudinit import netinfo
-
-import errno
 
 frequency = PER_ALWAYS
 
 LOG = logging.getLogger(__name__)
 # Ensure that /opt/rsct/bin has been added to standard PATH of the
 # distro. The symlink to rmcctrl is /usr/sbin/rsct/bin/rmcctrl .
-RMCCTRL = 'rmcctrl'
+RMCCTRL = "rmcctrl"
 
 
 def handle(name, _cfg, _cloud, _log, _args):
@@ -56,10 +54,11 @@ def handle(name, _cfg, _cloud, _log, _args):
         return
 
     LOG.debug(
-        'Making the IPv6 up explicitly. '
-        'Ensuring IPv6 interface is not being handled by NetworkManager '
-        'and it is  restarted to re-establish the communication with '
-        'the hypervisor')
+        "Making the IPv6 up explicitly. "
+        "Ensuring IPv6 interface is not being handled by NetworkManager "
+        "and it is  restarted to re-establish the communication with "
+        "the hypervisor"
+    )
 
     ifaces = find_ipv6_ifaces()
 
@@ -80,7 +79,7 @@ def find_ipv6_ifaces():
     ifaces = []
     for iface, data in info.items():
         if iface == "lo":
-            LOG.debug('Skipping localhost interface')
+            LOG.debug("Skipping localhost interface")
         if len(data.get("ipv4", [])) != 0:
             # skip this interface, as it has ipv4 addrs
             continue
@@ -92,16 +91,16 @@ def refresh_ipv6(interface):
     # IPv6 interface is explicitly brought up, subsequent to which the
     # RMC services are restarted to re-establish the communication with
     # the hypervisor.
-    subp.subp(['ip', 'link', 'set', interface, 'down'])
-    subp.subp(['ip', 'link', 'set', interface, 'up'])
+    subp.subp(["ip", "link", "set", interface, "down"])
+    subp.subp(["ip", "link", "set", interface, "up"])
 
 
 def sysconfig_path(iface):
-    return '/etc/sysconfig/network-scripts/ifcfg-' + iface
+    return "/etc/sysconfig/network-scripts/ifcfg-" + iface
 
 
 def restart_network_manager():
-    subp.subp(['systemctl', 'restart', 'NetworkManager'])
+    subp.subp(["systemctl", "restart", "NetworkManager"])
 
 
 def disable_ipv6(iface_file):
@@ -113,12 +112,11 @@ def disable_ipv6(iface_file):
         contents = util.load_file(iface_file)
     except IOError as e:
         if e.errno == errno.ENOENT:
-            LOG.debug("IPv6 interface file %s does not exist\n",
-                      iface_file)
+            LOG.debug("IPv6 interface file %s does not exist\n", iface_file)
         else:
             raise e
 
-    if 'IPV6INIT' not in contents:
+    if "IPV6INIT" not in contents:
         LOG.debug("Interface file %s did not have IPV6INIT", iface_file)
         return
 
@@ -135,11 +133,12 @@ def disable_ipv6(iface_file):
 
 def search(contents):
     # Search for any NM_CONTROLLED or IPV6 lines in IPv6 interface file.
-    return(
-        contents.startswith("IPV6ADDR") or
-        contents.startswith("IPADDR6") or
-        contents.startswith("IPV6INIT") or
-        contents.startswith("NM_CONTROLLED"))
+    return (
+        contents.startswith("IPV6ADDR")
+        or contents.startswith("IPADDR6")
+        or contents.startswith("IPV6INIT")
+        or contents.startswith("NM_CONTROLLED")
+    )
 
 
 def refresh_rmc():
@@ -152,8 +151,8 @@ def refresh_rmc():
     # until the subsystem and all resource managers are stopped.
     # -s : start Resource Monitoring & Control subsystem.
     try:
-        subp.subp([RMCCTRL, '-z'])
-        subp.subp([RMCCTRL, '-s'])
+        subp.subp([RMCCTRL, "-z"])
+        subp.subp([RMCCTRL, "-s"])
     except Exception:
-        util.logexc(LOG, 'Failed to refresh the RMC subsystem.')
+        util.logexc(LOG, "Failed to refresh the RMC subsystem.")
         raise
diff --git a/cloudinit/config/cc_reset_rmc.py b/cloudinit/config/cc_reset_rmc.py
index 1cd72774..3b929903 100644
--- a/cloudinit/config/cc_reset_rmc.py
+++ b/cloudinit/config/cc_reset_rmc.py
@@ -39,9 +39,8 @@ Prerequisite of using this module is to install RSCT packages.
 import os
 
 from cloudinit import log as logging
+from cloudinit import subp, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import util
-from cloudinit import subp
 
 frequency = PER_INSTANCE
 
@@ -49,34 +48,34 @@ frequency = PER_INSTANCE
 # The symlink for RMCCTRL and RECFGCT are
 # /usr/sbin/rsct/bin/rmcctrl and
 # /usr/sbin/rsct/install/bin/recfgct respectively.
-RSCT_PATH = '/opt/rsct/install/bin'
-RMCCTRL = 'rmcctrl'
-RECFGCT = 'recfgct'
+RSCT_PATH = "/opt/rsct/install/bin"
+RMCCTRL = "rmcctrl"
+RECFGCT = "recfgct"
 
 LOG = logging.getLogger(__name__)
 
-NODE_ID_FILE = '/etc/ct_node_id'
+NODE_ID_FILE = "/etc/ct_node_id"
 
 
 def handle(name, _cfg, cloud, _log, _args):
     # Ensuring node id has to be generated only once during first boot
-    if cloud.datasource.platform_type == 'none':
-        LOG.debug('Skipping creation of new ct_node_id node')
+    if cloud.datasource.platform_type == "none":
+        LOG.debug("Skipping creation of new ct_node_id node")
         return
 
     if not os.path.isdir(RSCT_PATH):
         LOG.debug("module disabled, RSCT_PATH not present")
         return
 
-    orig_path = os.environ.get('PATH')
+    orig_path = os.environ.get("PATH")
     try:
         add_path(orig_path)
         reset_rmc()
     finally:
         if orig_path:
-            os.environ['PATH'] = orig_path
+            os.environ["PATH"] = orig_path
         else:
-            del os.environ['PATH']
+            del os.environ["PATH"]
 
 
 def reconfigure_rsct_subsystems():
@@ -88,17 +87,17 @@ def reconfigure_rsct_subsystems():
         LOG.debug(out.strip())
         return out
     except subp.ProcessExecutionError:
-        util.logexc(LOG, 'Failed to reconfigure the RSCT subsystems.')
+        util.logexc(LOG, "Failed to reconfigure the RSCT subsystems.")
         raise
 
 
 def get_node_id():
     try:
         fp = util.load_file(NODE_ID_FILE)
-        node_id = fp.split('\n')[0]
+        node_id = fp.split("\n")[0]
         return node_id
     except Exception:
-        util.logexc(LOG, 'Failed to get node ID from file %s.' % NODE_ID_FILE)
+        util.logexc(LOG, "Failed to get node ID from file %s." % NODE_ID_FILE)
         raise
 
 
@@ -107,25 +106,25 @@ def add_path(orig_path):
     # So thet cloud init automatically find and
     # run RECFGCT to create new node_id.
     suff = ":" + orig_path if orig_path else ""
-    os.environ['PATH'] = RSCT_PATH + suff
-    return os.environ['PATH']
+    os.environ["PATH"] = RSCT_PATH + suff
+    return os.environ["PATH"]
 
 
 def rmcctrl():
     # Stop the RMC subsystem and all resource managers so that we can make
     # some changes to it
     try:
-        return subp.subp([RMCCTRL, '-z'])
+        return subp.subp([RMCCTRL, "-z"])
     except Exception:
-        util.logexc(LOG, 'Failed to stop the RMC subsystem.')
+        util.logexc(LOG, "Failed to stop the RMC subsystem.")
         raise
 
 
 def reset_rmc():
-    LOG.debug('Attempting to reset RMC.')
+    LOG.debug("Attempting to reset RMC.")
 
     node_id_before = get_node_id()
-    LOG.debug('Node ID at beginning of module: %s', node_id_before)
+    LOG.debug("Node ID at beginning of module: %s", node_id_before)
 
     # Stop the RMC subsystem and all resource managers so that we can make
     # some changes to it
@@ -133,11 +132,11 @@ def reset_rmc():
     reconfigure_rsct_subsystems()
 
     node_id_after = get_node_id()
-    LOG.debug('Node ID at end of module: %s', node_id_after)
+    LOG.debug("Node ID at end of module: %s", node_id_after)
 
     # Check if new node ID is generated or not
     # by comparing old and new node ID
     if node_id_after == node_id_before:
-        msg = 'New node ID did not get generated.'
+        msg = "New node ID did not get generated."
         LOG.error(msg)
         raise Exception(msg)
diff --git a/cloudinit/config/cc_resizefs.py b/cloudinit/config/cc_resizefs.py
index 00bb7ae7..b009c392 100644
--- a/cloudinit/config/cc_resizefs.py
+++ b/cloudinit/config/cc_resizefs.py
@@ -13,21 +13,21 @@ import os
 import stat
 from textwrap import dedent
 
+from cloudinit import subp, util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_ALWAYS
-from cloudinit import subp
-from cloudinit import util
 
 NOBLOCK = "noblock"
 
 frequency = PER_ALWAYS
-distros = ['all']
+distros = ["all"]
 
 meta = {
-    'id': 'cc_resizefs',
-    'name': 'Resizefs',
-    'title': 'Resize filesystem',
-    'description': dedent("""\
+    "id": "cc_resizefs",
+    "name": "Resizefs",
+    "title": "Resize filesystem",
+    "description": dedent(
+        """\
         Resize a filesystem to use all avaliable space on partition. This
         module is useful along with ``cc_growpart`` and will ensure that if the
         root partition has been resized the root filesystem will be resized
@@ -36,22 +36,26 @@ meta = {
         running. Optionally, the resize operation can be performed in the
         background while cloud-init continues running modules. This can be
         enabled by setting ``resize_rootfs`` to ``true``. This module can be
-        disabled altogether by setting ``resize_rootfs`` to ``false``."""),
-    'distros': distros,
-    'examples': [
-        'resize_rootfs: false  # disable root filesystem resize operation'],
-    'frequency': PER_ALWAYS,
+        disabled altogether by setting ``resize_rootfs`` to ``false``."""
+    ),
+    "distros": distros,
+    "examples": [
+        "resize_rootfs: false  # disable root filesystem resize operation"
+    ],
+    "frequency": PER_ALWAYS,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'resize_rootfs': {
-            'enum': [True, False, NOBLOCK],
-            'description': dedent("""\
-                Whether to resize the root partition. Default: 'true'""")
+    "type": "object",
+    "properties": {
+        "resize_rootfs": {
+            "enum": [True, False, NOBLOCK],
+            "description": dedent(
+                """\
+                Whether to resize the root partition. Default: 'true'"""
+            ),
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -63,32 +67,38 @@ def _resize_btrfs(mount_point, devpth):
     # Use a subvolume that is not ro to trick the resize operation to do the
     # "right" thing. The use of ".snapshot" is specific to "snapper" a generic
     # solution would be walk the subvolumes and find a rw mounted subvolume.
-    if (not util.mount_is_read_write(mount_point) and
-            os.path.isdir("%s/.snapshots" % mount_point)):
-        return ('btrfs', 'filesystem', 'resize', 'max',
-                '%s/.snapshots' % mount_point)
+    if not util.mount_is_read_write(mount_point) and os.path.isdir(
+        "%s/.snapshots" % mount_point
+    ):
+        return (
+            "btrfs",
+            "filesystem",
+            "resize",
+            "max",
+            "%s/.snapshots" % mount_point,
+        )
     else:
-        return ('btrfs', 'filesystem', 'resize', 'max', mount_point)
+        return ("btrfs", "filesystem", "resize", "max", mount_point)
 
 
 def _resize_ext(mount_point, devpth):
-    return ('resize2fs', devpth)
+    return ("resize2fs", devpth)
 
 
 def _resize_xfs(mount_point, devpth):
-    return ('xfs_growfs', mount_point)
+    return ("xfs_growfs", mount_point)
 
 
 def _resize_ufs(mount_point, devpth):
-    return ('growfs', '-y', mount_point)
+    return ("growfs", "-y", mount_point)
 
 
 def _resize_zfs(mount_point, devpth):
-    return ('zpool', 'online', '-e', mount_point, devpth)
+    return ("zpool", "online", "-e", mount_point, devpth)
 
 
 def _resize_hammer2(mount_point, devpth):
-    return ('hammer2', 'growfs', mount_point)
+    return ("hammer2", "growfs", mount_point)
 
 
 def _can_skip_resize_ufs(mount_point, devpth):
@@ -100,7 +110,7 @@ def _can_skip_resize_ufs(mount_point, devpth):
     # growfs exits with 1 for almost all cases up to this one.
     # This means we can't just use rcs=[0, 1] as subp parameter:
     try:
-        subp.subp(['growfs', '-N', devpth])
+        subp.subp(["growfs", "-N", devpth])
     except subp.ProcessExecutionError as e:
         if e.stderr.startswith(skip_start) and skip_contain in e.stderr:
             # This FS is already at the desired size
@@ -114,17 +124,15 @@ def _can_skip_resize_ufs(mount_point, devpth):
 # for multiple filesystem types if possible, e.g. one command for
 # ext2, ext3 and ext4.
 RESIZE_FS_PREFIXES_CMDS = [
-    ('btrfs', _resize_btrfs),
-    ('ext', _resize_ext),
-    ('xfs', _resize_xfs),
-    ('ufs', _resize_ufs),
-    ('zfs', _resize_zfs),
-    ('hammer2', _resize_hammer2),
+    ("btrfs", _resize_btrfs),
+    ("ext", _resize_ext),
+    ("xfs", _resize_xfs),
+    ("ufs", _resize_ufs),
+    ("zfs", _resize_zfs),
+    ("hammer2", _resize_hammer2),
 ]
 
-RESIZE_FS_PRECHECK_CMDS = {
-    'ufs': _can_skip_resize_ufs
-}
+RESIZE_FS_PRECHECK_CMDS = {"ufs": _can_skip_resize_ufs}
 
 
 def can_skip_resize(fs_type, resize_what, devpth):
@@ -148,52 +156,66 @@ def maybe_get_writable_device_path(devpath, info, log):
     container = util.is_container()
 
     # Ensure the path is a block device.
-    if (devpath == "/dev/root" and not os.path.exists(devpath) and
-            not container):
+    if (
+        devpath == "/dev/root"
+        and not os.path.exists(devpath)
+        and not container
+    ):
         devpath = util.rootdev_from_cmdline(util.get_cmdline())
         if devpath is None:
             log.warning("Unable to find device '/dev/root'")
             return None
         log.debug("Converted /dev/root to '%s' per kernel cmdline", devpath)
 
-    if devpath == 'overlayroot':
+    if devpath == "overlayroot":
         log.debug("Not attempting to resize devpath '%s': %s", devpath, info)
         return None
 
     # FreeBSD zpool can also just use gpt/<label>
     # with that in mind we can not do an os.stat on "gpt/whatever"
     # therefore return the devpath already here.
-    if devpath.startswith('gpt/'):
-        log.debug('We have a gpt label - just go ahead')
+    if devpath.startswith("gpt/"):
+        log.debug("We have a gpt label - just go ahead")
         return devpath
     # Alternatively, our device could simply be a name as returned by gpart,
     # such as da0p3
-    if not devpath.startswith('/dev/') and not os.path.exists(devpath):
-        fulldevpath = '/dev/' + devpath.lstrip('/')
-        log.debug("'%s' doesn't appear to be a valid device path. Trying '%s'",
-                  devpath, fulldevpath)
+    if not devpath.startswith("/dev/") and not os.path.exists(devpath):
+        fulldevpath = "/dev/" + devpath.lstrip("/")
+        log.debug(
+            "'%s' doesn't appear to be a valid device path. Trying '%s'",
+            devpath,
+            fulldevpath,
+        )
         devpath = fulldevpath
 
     try:
         statret = os.stat(devpath)
     except OSError as exc:
         if container and exc.errno == errno.ENOENT:
-            log.debug("Device '%s' did not exist in container. "
-                      "cannot resize: %s", devpath, info)
+            log.debug(
+                "Device '%s' did not exist in container. cannot resize: %s",
+                devpath,
+                info,
+            )
         elif exc.errno == errno.ENOENT:
-            log.warning("Device '%s' did not exist. cannot resize: %s",
-                        devpath, info)
+            log.warning(
+                "Device '%s' did not exist. cannot resize: %s", devpath, info
+            )
         else:
             raise exc
         return None
 
     if not stat.S_ISBLK(statret.st_mode) and not stat.S_ISCHR(statret.st_mode):
         if container:
-            log.debug("device '%s' not a block device in container."
-                      " cannot resize: %s" % (devpath, info))
+            log.debug(
+                "device '%s' not a block device in container."
+                " cannot resize: %s" % (devpath, info)
+            )
         else:
-            log.warning("device '%s' not a block device. cannot resize: %s" %
-                        (devpath, info))
+            log.warning(
+                "device '%s' not a block device. cannot resize: %s"
+                % (devpath, info)
+            )
         return None
     return devpath  # The writable block devpath
 
@@ -222,8 +244,8 @@ def handle(name, cfg, _cloud, log, args):
     # we will have to get the zpool name out of this
     # and set the resize_what variable to the zpool
     # so the _resize_zfs function gets the right attribute.
-    if fs_type == 'zfs':
-        zpool = devpth.split('/')[0]
+    if fs_type == "zfs":
+        zpool = devpth.split("/")[0]
         devpth = util.get_device_info_from_zpool(zpool)
         if not devpth:
             return  # could not find device from zpool
@@ -238,8 +260,9 @@ def handle(name, cfg, _cloud, log, args):
 
     resizer = None
     if can_skip_resize(fs_type, resize_what, devpth):
-        log.debug("Skip resize filesystem type %s for %s",
-                  fs_type, resize_what)
+        log.debug(
+            "Skip resize filesystem type %s for %s", fs_type, resize_what
+        )
         return
 
     fstype_lc = fs_type.lower()
@@ -249,29 +272,42 @@ def handle(name, cfg, _cloud, log, args):
             break
 
     if not resizer:
-        log.warning("Not resizing unknown filesystem type %s for %s",
-                    fs_type, resize_what)
+        log.warning(
+            "Not resizing unknown filesystem type %s for %s",
+            fs_type,
+            resize_what,
+        )
         return
 
     resize_cmd = resizer(resize_what, devpth)
-    log.debug("Resizing %s (%s) using %s", resize_what, fs_type,
-              ' '.join(resize_cmd))
+    log.debug(
+        "Resizing %s (%s) using %s", resize_what, fs_type, " ".join(resize_cmd)
+    )
 
     if resize_root == NOBLOCK:
         # Fork to a child that will run
         # the resize command
         util.fork_cb(
-            util.log_time, logfunc=log.debug, msg="backgrounded Resizing",
-            func=do_resize, args=(resize_cmd, log))
+            util.log_time,
+            logfunc=log.debug,
+            msg="backgrounded Resizing",
+            func=do_resize,
+            args=(resize_cmd, log),
+        )
     else:
-        util.log_time(logfunc=log.debug, msg="Resizing",
-                      func=do_resize, args=(resize_cmd, log))
-
-    action = 'Resized'
+        util.log_time(
+            logfunc=log.debug,
+            msg="Resizing",
+            func=do_resize,
+            args=(resize_cmd, log),
+        )
+
+    action = "Resized"
     if resize_root == NOBLOCK:
-        action = 'Resizing (via forking)'
-    log.debug("%s root filesystem (type=%s, val=%s)", action, fs_type,
-              resize_root)
+        action = "Resizing (via forking)"
+    log.debug(
+        "%s root filesystem (type=%s, val=%s)", action, fs_type, resize_root
+    )
 
 
 def do_resize(resize_cmd, log):
@@ -283,4 +319,5 @@ def do_resize(resize_cmd, log):
     # TODO(harlowja): Should we add a fsck check after this to make
     # sure we didn't corrupt anything?
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_resolv_conf.py b/cloudinit/config/cc_resolv_conf.py
index 648935e4..b2970d51 100644
--- a/cloudinit/config/cc_resolv_conf.py
+++ b/cloudinit/config/cc_resolv_conf.py
@@ -47,19 +47,18 @@ are configured correctly.
 """
 
 from cloudinit import log as logging
-from cloudinit import templater
+from cloudinit import templater, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import util
 
 LOG = logging.getLogger(__name__)
 
 frequency = PER_INSTANCE
 
-distros = ['alpine', 'fedora', 'opensuse', 'photon', 'rhel', 'sles']
+distros = ["alpine", "fedora", "opensuse", "photon", "rhel", "sles"]
 
 RESOLVE_CONFIG_TEMPLATE_MAP = {
-    '/etc/resolv.conf': 'resolv.conf',
-    '/etc/systemd/resolved.conf': 'systemd.resolved.conf',
+    "/etc/resolv.conf": "resolv.conf",
+    "/etc/systemd/resolved.conf": "systemd.resolved.conf",
 }
 
 
@@ -67,8 +66,8 @@ def generate_resolv_conf(template_fn, params, target_fname):
     flags = []
     false_flags = []
 
-    if 'options' in params:
-        for key, val in params['options'].items():
+    if "options" in params:
+        for key, val in params["options"].items():
             if isinstance(val, bool):
                 if val:
                     flags.append(key)
@@ -76,12 +75,12 @@ def generate_resolv_conf(template_fn, params, target_fname):
                     false_flags.append(key)
 
     for flag in flags + false_flags:
-        del params['options'][flag]
+        del params["options"][flag]
 
-    if not params.get('options'):
-        params['options'] = {}
+    if not params.get("options"):
+        params["options"] = {}
 
-    params['flags'] = flags
+    params["flags"] = flags
     LOG.debug("Writing resolv.conf from template %s", template_fn)
     templater.render_to_file(template_fn, target_fname, params)
 
@@ -97,13 +96,19 @@ def handle(name, cfg, cloud, log, _args):
     @param args: Any module arguments from cloud.cfg
     """
     if "manage_resolv_conf" not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'manage_resolv_conf' key in configuration"), name)
+        log.debug(
+            "Skipping module named %s,"
+            " no 'manage_resolv_conf' key in configuration",
+            name,
+        )
         return
 
     if not util.get_cfg_option_bool(cfg, "manage_resolv_conf", False):
-        log.debug(("Skipping module named %s,"
-                   " 'manage_resolv_conf' present but set to False"), name)
+        log.debug(
+            "Skipping module named %s,"
+            " 'manage_resolv_conf' present but set to False",
+            name,
+        )
         return
 
     if "resolv_conf" not in cfg:
@@ -112,7 +117,8 @@ def handle(name, cfg, cloud, log, _args):
 
     try:
         template_fn = cloud.get_template_filename(
-            RESOLVE_CONFIG_TEMPLATE_MAP[cloud.distro.resolve_conf_fn])
+            RESOLVE_CONFIG_TEMPLATE_MAP[cloud.distro.resolve_conf_fn]
+        )
     except KeyError:
         log.warning("No template found, not rendering resolve configs")
         return
@@ -120,8 +126,9 @@ def handle(name, cfg, cloud, log, _args):
     generate_resolv_conf(
         template_fn=template_fn,
         params=cfg["resolv_conf"],
-        target_fname=cloud.distro.resolve_conf_fn
+        target_fname=cloud.distro.resolve_conf_fn,
     )
     return
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_rh_subscription.py b/cloudinit/config/cc_rh_subscription.py
index 693317c2..b81a7a9b 100644
--- a/cloudinit/config/cc_rh_subscription.py
+++ b/cloudinit/config/cc_rh_subscription.py
@@ -39,12 +39,11 @@ Subscription`` example config.
 """
 
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
-distros = ['fedora', 'rhel']
+distros = ["fedora", "rhel"]
 
 
 def handle(name, cfg, _cloud, log, _args):
@@ -60,8 +59,9 @@ def handle(name, cfg, _cloud, log, _args):
                 raise SubscriptionError(verify_msg)
             cont = sm.rhn_register()
             if not cont:
-                raise SubscriptionError("Registration failed or did not "
-                                        "run completely")
+                raise SubscriptionError(
+                    "Registration failed or did not run completely"
+                )
 
             # Splitting up the registration, auto-attach, and servicelevel
             # commands because the error codes, messages from subman are not
@@ -70,8 +70,7 @@ def handle(name, cfg, _cloud, log, _args):
             # Attempt to change the service level
             if sm.auto_attach and sm.servicelevel is not None:
                 if not sm._set_service_level():
-                    raise SubscriptionError("Setting of service-level "
-                                            "failed")
+                    raise SubscriptionError("Setting of service-level failed")
                 else:
                     sm.log.debug("Completed auto-attach with service level")
             elif sm.auto_attach:
@@ -87,8 +86,9 @@ def handle(name, cfg, _cloud, log, _args):
 
                 return_stat = sm.addPool(sm.pools)
                 if not return_stat:
-                    raise SubscriptionError("Unable to attach pools {0}"
-                                            .format(sm.pools))
+                    raise SubscriptionError(
+                        "Unable to attach pools {0}".format(sm.pools)
+                    )
             return_stat = sm.update_repos()
             if not return_stat:
                 raise SubscriptionError("Unable to add or remove repos")
@@ -105,72 +105,87 @@ class SubscriptionError(Exception):
 
 
 class SubscriptionManager(object):
-    valid_rh_keys = ['org', 'activation-key', 'username', 'password',
-                     'disable-repo', 'enable-repo', 'add-pool',
-                     'rhsm-baseurl', 'server-hostname',
-                     'auto-attach', 'service-level']
+    valid_rh_keys = [
+        "org",
+        "activation-key",
+        "username",
+        "password",
+        "disable-repo",
+        "enable-repo",
+        "add-pool",
+        "rhsm-baseurl",
+        "server-hostname",
+        "auto-attach",
+        "service-level",
+    ]
 
     def __init__(self, cfg, log=None):
         if log is None:
             log = LOG
         self.log = log
         self.cfg = cfg
-        self.rhel_cfg = self.cfg.get('rh_subscription', {})
-        self.rhsm_baseurl = self.rhel_cfg.get('rhsm-baseurl')
-        self.server_hostname = self.rhel_cfg.get('server-hostname')
-        self.pools = self.rhel_cfg.get('add-pool')
-        self.activation_key = self.rhel_cfg.get('activation-key')
-        self.org = self.rhel_cfg.get('org')
-        self.userid = self.rhel_cfg.get('username')
-        self.password = self.rhel_cfg.get('password')
-        self.auto_attach = self.rhel_cfg.get('auto-attach')
-        self.enable_repo = self.rhel_cfg.get('enable-repo')
-        self.disable_repo = self.rhel_cfg.get('disable-repo')
-        self.servicelevel = self.rhel_cfg.get('service-level')
+        self.rhel_cfg = self.cfg.get("rh_subscription", {})
+        self.rhsm_baseurl = self.rhel_cfg.get("rhsm-baseurl")
+        self.server_hostname = self.rhel_cfg.get("server-hostname")
+        self.pools = self.rhel_cfg.get("add-pool")
+        self.activation_key = self.rhel_cfg.get("activation-key")
+        self.org = self.rhel_cfg.get("org")
+        self.userid = self.rhel_cfg.get("username")
+        self.password = self.rhel_cfg.get("password")
+        self.auto_attach = self.rhel_cfg.get("auto-attach")
+        self.enable_repo = self.rhel_cfg.get("enable-repo")
+        self.disable_repo = self.rhel_cfg.get("disable-repo")
+        self.servicelevel = self.rhel_cfg.get("service-level")
 
     def log_success(self, msg):
-        '''Simple wrapper for logging info messages. Useful for unittests'''
+        """Simple wrapper for logging info messages. Useful for unittests"""
         self.log.info(msg)
 
     def log_warn(self, msg):
-        '''Simple wrapper for logging warning messages. Useful for unittests'''
+        """Simple wrapper for logging warning messages. Useful for unittests"""
         self.log.warning(msg)
 
     def _verify_keys(self):
-        '''
+        """
         Checks that the keys in the rh_subscription dict from the user-data
         are what we expect.
-        '''
+        """
 
         for k in self.rhel_cfg:
             if k not in self.valid_rh_keys:
-                bad_key = "{0} is not a valid key for rh_subscription. "\
-                          "Valid keys are: "\
-                          "{1}".format(k, ', '.join(self.valid_rh_keys))
+                bad_key = (
+                    "{0} is not a valid key for rh_subscription. "
+                    "Valid keys are: "
+                    "{1}".format(k, ", ".join(self.valid_rh_keys))
+                )
                 return False, bad_key
 
         # Check for bad auto-attach value
-        if (self.auto_attach is not None) and \
-                not (util.is_true(self.auto_attach) or
-                     util.is_false(self.auto_attach)):
-            not_bool = "The key auto-attach must be a boolean value "\
-                       "(True/False "
+        if (self.auto_attach is not None) and not (
+            util.is_true(self.auto_attach) or util.is_false(self.auto_attach)
+        ):
+            not_bool = (
+                "The key auto-attach must be a boolean value (True/False "
+            )
             return False, not_bool
 
-        if (self.servicelevel is not None) and ((not self.auto_attach) or
-           (util.is_false(str(self.auto_attach)))):
-            no_auto = ("The service-level key must be used in conjunction "
-                       "with the auto-attach key.  Please re-run with "
-                       "auto-attach: True")
+        if (self.servicelevel is not None) and (
+            (not self.auto_attach) or (util.is_false(str(self.auto_attach)))
+        ):
+            no_auto = (
+                "The service-level key must be used in conjunction "
+                "with the auto-attach key.  Please re-run with "
+                "auto-attach: True"
+            )
             return False, no_auto
         return True, None
 
     def is_registered(self):
-        '''
+        """
         Checks if the system is already registered and returns
         True if so, else False
-        '''
-        cmd = ['identity']
+        """
+        cmd = ["identity"]
 
         try:
             _sub_man_cli(cmd)
@@ -180,15 +195,18 @@ class SubscriptionManager(object):
         return True
 
     def rhn_register(self):
-        '''
+        """
         Registers the system by userid and password or activation key
         and org.  Returns True when successful False when not.
-        '''
+        """
 
         if (self.activation_key is not None) and (self.org is not None):
             # register by activation key
-            cmd = ['register', '--activationkey={0}'.
-                   format(self.activation_key), '--org={0}'.format(self.org)]
+            cmd = [
+                "register",
+                "--activationkey={0}".format(self.activation_key),
+                "--org={0}".format(self.org),
+            ]
 
             # If the baseurl and/or server url are passed in, we register
             # with them.
@@ -203,14 +221,18 @@ class SubscriptionManager(object):
                 return_out = _sub_man_cli(cmd, logstring_val=True)[0]
             except subp.ProcessExecutionError as e:
                 if e.stdout == "":
-                    self.log_warn("Registration failed due "
-                                  "to: {0}".format(e.stderr))
+                    self.log_warn(
+                        "Registration failed due to: {0}".format(e.stderr)
+                    )
                 return False
 
         elif (self.userid is not None) and (self.password is not None):
             # register by username and password
-            cmd = ['register', '--username={0}'.format(self.userid),
-                   '--password={0}'.format(self.password)]
+            cmd = [
+                "register",
+                "--username={0}".format(self.userid),
+                "--password={0}".format(self.password),
+            ]
 
             # If the baseurl and/or server url are passed in, we register
             # with them.
@@ -226,15 +248,18 @@ class SubscriptionManager(object):
                 return_out = _sub_man_cli(cmd, logstring_val=True)[0]
             except subp.ProcessExecutionError as e:
                 if e.stdout == "":
-                    self.log_warn("Registration failed due "
-                                  "to: {0}".format(e.stderr))
+                    self.log_warn(
+                        "Registration failed due to: {0}".format(e.stderr)
+                    )
                 return False
 
         else:
-            self.log_warn("Unable to register system due to incomplete "
-                          "information.")
-            self.log_warn("Use either activationkey and org *or* userid "
-                          "and password")
+            self.log_warn(
+                "Unable to register system due to incomplete information."
+            )
+            self.log_warn(
+                "Use either activationkey and org *or* userid and password"
+            )
             return False
 
         reg_id = return_out.split("ID: ")[1].rstrip()
@@ -242,19 +267,25 @@ class SubscriptionManager(object):
         return True
 
     def _set_service_level(self):
-        cmd = ['attach', '--auto', '--servicelevel={0}'
-               .format(self.servicelevel)]
+        cmd = [
+            "attach",
+            "--auto",
+            "--servicelevel={0}".format(self.servicelevel),
+        ]
 
         try:
             return_out = _sub_man_cli(cmd)[0]
         except subp.ProcessExecutionError as e:
-            if e.stdout.rstrip() != '':
+            if e.stdout.rstrip() != "":
                 for line in e.stdout.split("\n"):
-                    if line != '':
+                    if line != "":
                         self.log_warn(line)
             else:
-                self.log_warn("Setting the service level failed with: "
-                              "{0}".format(e.stderr.strip()))
+                self.log_warn(
+                    "Setting the service level failed with: {0}".format(
+                        e.stderr.strip()
+                    )
+                )
             return False
         for line in return_out.split("\n"):
             if line != "":
@@ -262,7 +293,7 @@ class SubscriptionManager(object):
         return True
 
     def _set_auto_attach(self):
-        cmd = ['attach', '--auto']
+        cmd = ["attach", "--auto"]
         try:
             return_out = _sub_man_cli(cmd)[0]
         except subp.ProcessExecutionError as e:
@@ -274,52 +305,52 @@ class SubscriptionManager(object):
         return True
 
     def _getPools(self):
-        '''
+        """
         Gets the list pools for the active subscription and returns them
         in list form.
-        '''
+        """
         available = []
         consumed = []
 
         # Get all available pools
-        cmd = ['list', '--available', '--pool-only']
+        cmd = ["list", "--available", "--pool-only"]
         results = _sub_man_cli(cmd)[0]
         available = (results.rstrip()).split("\n")
 
         # Get all consumed pools
-        cmd = ['list', '--consumed', '--pool-only']
+        cmd = ["list", "--consumed", "--pool-only"]
         results = _sub_man_cli(cmd)[0]
         consumed = (results.rstrip()).split("\n")
 
         return available, consumed
 
     def _getRepos(self):
-        '''
+        """
         Obtains the current list of active yum repositories and returns
         them in list form.
-        '''
+        """
 
-        cmd = ['repos', '--list-enabled']
+        cmd = ["repos", "--list-enabled"]
         return_out = _sub_man_cli(cmd)[0]
         active_repos = []
         for repo in return_out.split("\n"):
             if "Repo ID:" in repo:
-                active_repos.append((repo.split(':')[1]).strip())
+                active_repos.append((repo.split(":")[1]).strip())
 
-        cmd = ['repos', '--list-disabled']
+        cmd = ["repos", "--list-disabled"]
         return_out = _sub_man_cli(cmd)[0]
 
         inactive_repos = []
         for repo in return_out.split("\n"):
             if "Repo ID:" in repo:
-                inactive_repos.append((repo.split(':')[1]).strip())
+                inactive_repos.append((repo.split(":")[1]).strip())
         return active_repos, inactive_repos
 
     def addPool(self, pools):
-        '''
+        """
         Takes a list of subscription pools and "attaches" them to the
         current subscription
-        '''
+        """
 
         # An empty list was passed
         if len(pools) == 0:
@@ -328,31 +359,33 @@ class SubscriptionManager(object):
 
         pool_available, pool_consumed = self._getPools()
         pool_list = []
-        cmd = ['attach']
+        cmd = ["attach"]
         for pool in pools:
             if (pool not in pool_consumed) and (pool in pool_available):
-                pool_list.append('--pool={0}'.format(pool))
+                pool_list.append("--pool={0}".format(pool))
             else:
                 self.log_warn("Pool {0} is not available".format(pool))
         if len(pool_list) > 0:
             cmd.extend(pool_list)
             try:
                 _sub_man_cli(cmd)
-                self.log.debug("Attached the following pools to your "
-                               "system: %s", (", ".join(pool_list))
-                               .replace('--pool=', ''))
+                self.log.debug(
+                    "Attached the following pools to your system: %s",
+                    (", ".join(pool_list)).replace("--pool=", ""),
+                )
                 return True
             except subp.ProcessExecutionError as e:
-                self.log_warn("Unable to attach pool {0} "
-                              "due to {1}".format(pool, e))
+                self.log_warn(
+                    "Unable to attach pool {0} due to {1}".format(pool, e)
+                )
                 return False
 
     def update_repos(self):
-        '''
+        """
         Takes a list of yum repo ids that need to be disabled or enabled; then
         it verifies if they are already enabled or disabled and finally
         executes the action to disable or enable
-        '''
+        """
 
         erepos = self.enable_repo
         drepos = self.disable_repo
@@ -378,7 +411,7 @@ class SubscriptionManager(object):
         enable_list = []
         enable_list_fail = []
         for repoid in erepos:
-            if (repoid in inactive_repos):
+            if repoid in inactive_repos:
                 enable_list.append("--enable={0}".format(repoid))
             else:
                 enable_list_fail.append(repoid)
@@ -399,14 +432,16 @@ class SubscriptionManager(object):
                 if fail in active_repos:
                     self.log.debug("Repo %s is already enabled", fail)
                 else:
-                    self.log_warn("Repo {0} does not appear to "
-                                  "exist".format(fail))
+                    self.log_warn(
+                        "Repo {0} does not appear to exist".format(fail)
+                    )
         if len(disable_list_fail) > 0:
             for fail in disable_list_fail:
-                self.log.debug("Repo %s not disabled "
-                               "because it is not enabled", fail)
+                self.log.debug(
+                    "Repo %s not disabled because it is not enabled", fail
+                )
 
-        cmd = ['repos']
+        cmd = ["repos"]
         if len(disable_list) > 0:
             cmd.extend(disable_list)
 
@@ -420,11 +455,15 @@ class SubscriptionManager(object):
             return False
 
         if len(enable_list) > 0:
-            self.log.debug("Enabled the following repos: %s",
-                           (", ".join(enable_list)).replace('--enable=', ''))
+            self.log.debug(
+                "Enabled the following repos: %s",
+                (", ".join(enable_list)).replace("--enable=", ""),
+            )
         if len(disable_list) > 0:
-            self.log.debug("Disabled the following repos: %s",
-                           (", ".join(disable_list)).replace('--disable=', ''))
+            self.log.debug(
+                "Disabled the following repos: %s",
+                (", ".join(disable_list)).replace("--disable=", ""),
+            )
         return True
 
     def is_configured(self):
@@ -432,13 +471,12 @@ class SubscriptionManager(object):
 
 
 def _sub_man_cli(cmd, logstring_val=False):
-    '''
+    """
     Uses the prefered cloud-init subprocess def of subp.subp
     and runs subscription-manager.  Breaking this to a
     separate function for later use in mocking and unittests
-    '''
-    return subp.subp(['subscription-manager'] + cmd,
-                     logstring=logstring_val)
+    """
+    return subp.subp(["subscription-manager"] + cmd, logstring=logstring_val)
 
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_rightscale_userdata.py b/cloudinit/config/cc_rightscale_userdata.py
index c75dc57d..36a009a2 100644
--- a/cloudinit/config/cc_rightscale_userdata.py
+++ b/cloudinit/config/cc_rightscale_userdata.py
@@ -52,14 +52,14 @@ user scripts configuration directory, to be run later by ``cc_scripts_user``.
 import os
 from urllib.parse import parse_qs
 
-from cloudinit.settings import PER_INSTANCE
 from cloudinit import url_helper as uhelp
 from cloudinit import util
+from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
 
 MY_NAME = "cc_rightscale_userdata"
-MY_HOOKNAME = 'CLOUD_INIT_REMOTE_HOOK'
+MY_HOOKNAME = "CLOUD_INIT_REMOTE_HOOK"
 
 
 def handle(name, _cfg, cloud, log, _args):
@@ -72,13 +72,16 @@ def handle(name, _cfg, cloud, log, _args):
     try:
         mdict = parse_qs(ud)
         if not mdict or MY_HOOKNAME not in mdict:
-            log.debug(("Skipping module %s, "
-                       "did not find %s in parsed"
-                       " raw userdata"), name, MY_HOOKNAME)
+            log.debug(
+                "Skipping module %s, did not find %s in parsed raw userdata",
+                name,
+                MY_HOOKNAME,
+            )
             return
     except Exception:
-        util.logexc(log, "Failed to parse query string %s into a dictionary",
-                    ud)
+        util.logexc(
+            log, "Failed to parse query string %s into a dictionary", ud
+        )
         raise
 
     wrote_fns = []
@@ -87,7 +90,7 @@ def handle(name, _cfg, cloud, log, _args):
     # These will eventually be then ran by the cc_scripts_user
     # TODO(harlowja): maybe this should just be a new user data handler??
     # Instead of a late module that acts like a user data handler?
-    scripts_d = cloud.get_ipath_cur('scripts')
+    scripts_d = cloud.get_ipath_cur("scripts")
     urls = mdict[MY_HOOKNAME]
     for (i, url) in enumerate(urls):
         fname = os.path.join(scripts_d, "rightscale-%02i" % (i))
@@ -99,8 +102,9 @@ def handle(name, _cfg, cloud, log, _args):
                 wrote_fns.append(fname)
         except Exception as e:
             captured_excps.append(e)
-            util.logexc(log, "%s failed to read %s and write %s", MY_NAME, url,
-                        fname)
+            util.logexc(
+                log, "%s failed to read %s and write %s", MY_NAME, url, fname
+            )
 
     if wrote_fns:
         log.debug("Wrote out rightscale userdata to %s files", len(wrote_fns))
@@ -110,8 +114,11 @@ def handle(name, _cfg, cloud, log, _args):
         log.debug("%s urls were skipped or failed", skipped)
 
     if captured_excps:
-        log.warning("%s failed with exceptions, re-raising the last one",
-                    len(captured_excps))
+        log.warning(
+            "%s failed with exceptions, re-raising the last one",
+            len(captured_excps),
+        )
         raise captured_excps[-1]
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_rsyslog.py b/cloudinit/config/cc_rsyslog.py
index dd2bbd00..8dd4950f 100644
--- a/cloudinit/config/cc_rsyslog.py
+++ b/cloudinit/config/cc_rsyslog.py
@@ -182,45 +182,45 @@ import os
 import re
 
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 DEF_FILENAME = "20-cloud-config.conf"
 DEF_DIR = "/etc/rsyslog.d"
 DEF_RELOAD = "auto"
 DEF_REMOTES = {}
 
-KEYNAME_CONFIGS = 'configs'
-KEYNAME_FILENAME = 'config_filename'
-KEYNAME_DIR = 'config_dir'
-KEYNAME_RELOAD = 'service_reload_command'
-KEYNAME_LEGACY_FILENAME = 'rsyslog_filename'
-KEYNAME_LEGACY_DIR = 'rsyslog_dir'
-KEYNAME_REMOTES = 'remotes'
+KEYNAME_CONFIGS = "configs"
+KEYNAME_FILENAME = "config_filename"
+KEYNAME_DIR = "config_dir"
+KEYNAME_RELOAD = "service_reload_command"
+KEYNAME_LEGACY_FILENAME = "rsyslog_filename"
+KEYNAME_LEGACY_DIR = "rsyslog_dir"
+KEYNAME_REMOTES = "remotes"
 
 LOG = logging.getLogger(__name__)
 
-COMMENT_RE = re.compile(r'[ ]*[#]+[ ]*')
+COMMENT_RE = re.compile(r"[ ]*[#]+[ ]*")
 HOST_PORT_RE = re.compile(
-    r'^(?P<proto>[@]{0,2})'
-    r'(([\[](?P<bracket_addr>[^\]]*)[\]])|(?P<addr>[^:]*))'
-    r'([:](?P<port>[0-9]+))?$')
+    r"^(?P<proto>[@]{0,2})"
+    r"(([\[](?P<bracket_addr>[^\]]*)[\]])|(?P<addr>[^:]*))"
+    r"([:](?P<port>[0-9]+))?$"
+)
 
 
 def reload_syslog(distro, command=DEF_RELOAD):
     if command == DEF_RELOAD:
-        service = distro.get_option('rsyslog_svcname', 'rsyslog')
-        return distro.manage_service('try-reload', service)
+        service = distro.get_option("rsyslog_svcname", "rsyslog")
+        return distro.manage_service("try-reload", service)
     return subp.subp(command, capture=True)
 
 
 def load_config(cfg):
     # return an updated config with entries of the correct type
     # support converting the old top level format into new format
-    mycfg = cfg.get('rsyslog', {})
+    mycfg = cfg.get("rsyslog", {})
 
-    if isinstance(cfg.get('rsyslog'), list):
-        mycfg = {KEYNAME_CONFIGS: cfg.get('rsyslog')}
+    if isinstance(cfg.get("rsyslog"), list):
+        mycfg = {KEYNAME_CONFIGS: cfg.get("rsyslog")}
         if KEYNAME_LEGACY_FILENAME in cfg:
             mycfg[KEYNAME_FILENAME] = cfg[KEYNAME_LEGACY_FILENAME]
         if KEYNAME_LEGACY_DIR in cfg:
@@ -231,7 +231,8 @@ def load_config(cfg):
         (KEYNAME_DIR, DEF_DIR, str),
         (KEYNAME_FILENAME, DEF_FILENAME, str),
         (KEYNAME_RELOAD, DEF_RELOAD, (str, list)),
-        (KEYNAME_REMOTES, DEF_REMOTES, dict))
+        (KEYNAME_REMOTES, DEF_REMOTES, dict),
+    )
 
     for key, default, vtypes in fillup:
         if key not in mycfg or not isinstance(mycfg[key], vtypes):
@@ -247,10 +248,11 @@ def apply_rsyslog_changes(configs, def_fname, cfg_dir):
     for cur_pos, ent in enumerate(configs):
         if isinstance(ent, dict):
             if "content" not in ent:
-                LOG.warning("No 'content' entry in config entry %s",
-                            cur_pos + 1)
+                LOG.warning(
+                    "No 'content' entry in config entry %s", cur_pos + 1
+                )
                 continue
-            content = ent['content']
+            content = ent["content"]
             filename = ent.get("filename", def_fname)
         else:
             content = ent
@@ -301,9 +303,9 @@ def parse_remotes_line(line, name=None):
     if not toks:
         raise ValueError("Invalid host specification '%s'" % host_port)
 
-    proto = toks.group('proto')
-    addr = toks.group('addr') or toks.group('bracket_addr')
-    port = toks.group('port')
+    proto = toks.group("proto")
+    addr = toks.group("addr") or toks.group("bracket_addr")
+    port = toks.group("port")
 
     if addr.startswith("[") and not addr.endswith("]"):
         raise ValueError("host spec had invalid brackets: %s" % addr)
@@ -311,15 +313,17 @@ def parse_remotes_line(line, name=None):
     if comment and not name:
         name = comment
 
-    t = SyslogRemotesLine(name=name, match=match, proto=proto,
-                          addr=addr, port=port)
+    t = SyslogRemotesLine(
+        name=name, match=match, proto=proto, addr=addr, port=port
+    )
     t.validate()
     return t
 
 
 class SyslogRemotesLine(object):
-    def __init__(self, name=None, match=None, proto=None, addr=None,
-                 port=None):
+    def __init__(
+        self, name=None, match=None, proto=None, addr=None, port=None
+    ):
         if not match:
             match = "*.*"
         self.name = name
@@ -352,7 +356,11 @@ class SyslogRemotesLine(object):
 
     def __repr__(self):
         return "[name=%s match=%s proto=%s address=%s port=%s]" % (
-            self.name, self.match, self.proto, self.addr, self.port
+            self.name,
+            self.match,
+            self.proto,
+            self.addr,
+            self.port,
         )
 
     def __str__(self):
@@ -390,13 +398,14 @@ def remotes_to_rsyslog_cfg(remotes, header=None, footer=None):
             LOG.warning("failed loading remote %s: %s [%s]", name, line, e)
     if footer is not None:
         lines.append(footer)
-    return '\n'.join(lines) + "\n"
+    return "\n".join(lines) + "\n"
 
 
 def handle(name, cfg, cloud, log, _args):
-    if 'rsyslog' not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'rsyslog' key in configuration"), name)
+    if "rsyslog" not in cfg:
+        log.debug(
+            "Skipping module named %s, no 'rsyslog' key in configuration", name
+        )
         return
 
     mycfg = load_config(cfg)
@@ -408,16 +417,18 @@ def handle(name, cfg, cloud, log, _args):
                 mycfg[KEYNAME_REMOTES],
                 header="# begin remotes",
                 footer="# end remotes",
-            ))
+            )
+        )
 
-    if not mycfg['configs']:
+    if not mycfg["configs"]:
         log.debug("Empty config rsyslog['configs'], nothing to do")
         return
 
     changes = apply_rsyslog_changes(
         configs=mycfg[KEYNAME_CONFIGS],
         def_fname=mycfg[KEYNAME_FILENAME],
-        cfg_dir=mycfg[KEYNAME_DIR])
+        cfg_dir=mycfg[KEYNAME_DIR],
+    )
 
     if not changes:
         log.debug("restart of syslog not necessary, no changes made")
@@ -437,4 +448,5 @@ def handle(name, cfg, cloud, log, _args):
         # the logging was setup to use it...
         log.debug("%s configured %s files", name, changes)
 
+
 # vi: ts=4 expandtab syntax=python
diff --git a/cloudinit/config/cc_runcmd.py b/cloudinit/config/cc_runcmd.py
index 2f5e02cb..15cbaf1a 100644
--- a/cloudinit/config/cc_runcmd.py
+++ b/cloudinit/config/cc_runcmd.py
@@ -8,14 +8,13 @@
 
 """Runcmd: run arbitrary commands at rc.local with output to the console"""
 
-from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
-from cloudinit.distros import ALL_DISTROS
-from cloudinit.settings import PER_INSTANCE
-from cloudinit import util
-
 import os
 from textwrap import dedent
 
+from cloudinit import util
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
+from cloudinit.distros import ALL_DISTROS
+from cloudinit.settings import PER_INSTANCE
 
 # The schema definition for each cloud-config module is a strict contract for
 # describing supported configuration parameters for each cloud-config section.
@@ -26,10 +25,11 @@ from textwrap import dedent
 distros = [ALL_DISTROS]
 
 meta = {
-    'id': 'cc_runcmd',
-    'name': 'Runcmd',
-    'title': 'Run arbitrary commands',
-    'description': dedent("""\
+    "id": "cc_runcmd",
+    "name": "Runcmd",
+    "title": "Run arbitrary commands",
+    "description": dedent(
+        """\
         Run arbitrary commands at a rc.local like level with output to the
         console. Each item can be either a list or a string. If the item is a
         list, it will be properly executed as if passed to ``execve()`` (with
@@ -46,35 +46,41 @@ meta = {
 
           when writing files, do not use /tmp dir as it races with
           systemd-tmpfiles-clean LP: #1707222. Use /run/somedir instead.
-    """),
-    'distros': distros,
-    'examples': [dedent("""\
+    """
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         runcmd:
             - [ ls, -l, / ]
             - [ sh, -xc, "echo $(date) ': hello world!'" ]
             - [ sh, -c, echo "=========hello world'=========" ]
             - ls -l /root
             - [ wget, "http://example.org", -O, /tmp/index.html ]
-    """)],
-    'frequency': PER_INSTANCE,
+    """
+        )
+    ],
+    "frequency": PER_INSTANCE,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'runcmd': {
-            'type': 'array',
-            'items': {
-                'oneOf': [
-                    {'type': 'array', 'items': {'type': 'string'}},
-                    {'type': 'string'},
-                    {'type': 'null'}]
+    "type": "object",
+    "properties": {
+        "runcmd": {
+            "type": "array",
+            "items": {
+                "oneOf": [
+                    {"type": "array", "items": {"type": "string"}},
+                    {"type": "string"},
+                    {"type": "null"},
+                ]
             },
-            'additionalItems': False,  # Reject items of non-string non-list
-            'additionalProperties': False,
-            'minItems': 1,
+            "additionalItems": False,  # Reject items of non-string non-list
+            "additionalProperties": False,
+            "minItems": 1,
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -82,17 +88,19 @@ __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 def handle(name, cfg, cloud, log, _args):
     if "runcmd" not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'runcmd' key in configuration"), name)
+        log.debug(
+            "Skipping module named %s, no 'runcmd' key in configuration", name
+        )
         return
 
     validate_cloudconfig_schema(cfg, schema)
-    out_fn = os.path.join(cloud.get_ipath('scripts'), "runcmd")
+    out_fn = os.path.join(cloud.get_ipath("scripts"), "runcmd")
     cmd = cfg["runcmd"]
     try:
         content = util.shellify(cmd)
         util.write_file(out_fn, content, 0o700)
     except Exception as e:
-        raise type(e)('Failed to shellify {} into file {}'.format(cmd, out_fn))
+        raise type(e)("Failed to shellify {} into file {}".format(cmd, out_fn))
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_salt_minion.py b/cloudinit/config/cc_salt_minion.py
index b61876aa..b2e5eefd 100644
--- a/cloudinit/config/cc_salt_minion.py
+++ b/cloudinit/config/cc_salt_minion.py
@@ -48,7 +48,6 @@ import os
 from cloudinit import safeyaml, subp, util
 from cloudinit.distros import rhel_util
 
-
 # Note: see https://docs.saltstack.com/en/latest/topics/installation/
 # Note: see https://docs.saltstack.com/en/latest/ref/configuration/
 
@@ -57,36 +56,40 @@ class SaltConstants(object):
     """
     defines default distribution specific salt variables
     """
+
     def __init__(self, cfg):
 
         # constants tailored for FreeBSD
         if util.is_FreeBSD():
-            self.pkg_name = 'py36-salt'
-            self.srv_name = 'salt_minion'
-            self.conf_dir = '/usr/local/etc/salt'
+            self.pkg_name = "py36-salt"
+            self.srv_name = "salt_minion"
+            self.conf_dir = "/usr/local/etc/salt"
         # constants for any other OS
         else:
-            self.pkg_name = 'salt-minion'
-            self.srv_name = 'salt-minion'
-            self.conf_dir = '/etc/salt'
+            self.pkg_name = "salt-minion"
+            self.srv_name = "salt-minion"
+            self.conf_dir = "/etc/salt"
 
         # if there are constants given in cloud config use those
-        self.pkg_name = util.get_cfg_option_str(cfg, 'pkg_name',
-                                                self.pkg_name)
-        self.conf_dir = util.get_cfg_option_str(cfg, 'config_dir',
-                                                self.conf_dir)
-        self.srv_name = util.get_cfg_option_str(cfg, 'service_name',
-                                                self.srv_name)
+        self.pkg_name = util.get_cfg_option_str(cfg, "pkg_name", self.pkg_name)
+        self.conf_dir = util.get_cfg_option_str(
+            cfg, "config_dir", self.conf_dir
+        )
+        self.srv_name = util.get_cfg_option_str(
+            cfg, "service_name", self.srv_name
+        )
 
 
 def handle(name, cfg, cloud, log, _args):
     # If there isn't a salt key in the configuration don't do anything
-    if 'salt_minion' not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'salt_minion' key in configuration"), name)
+    if "salt_minion" not in cfg:
+        log.debug(
+            "Skipping module named %s, no 'salt_minion' key in configuration",
+            name,
+        )
         return
 
-    s_cfg = cfg['salt_minion']
+    s_cfg = cfg["salt_minion"]
     const = SaltConstants(cfg=s_cfg)
 
     # Start by installing the salt package ...
@@ -96,40 +99,42 @@ def handle(name, cfg, cloud, log, _args):
     util.ensure_dir(const.conf_dir)
 
     # ... and then update the salt configuration
-    if 'conf' in s_cfg:
+    if "conf" in s_cfg:
         # Add all sections from the conf object to minion config file
-        minion_config = os.path.join(const.conf_dir, 'minion')
-        minion_data = safeyaml.dumps(s_cfg.get('conf'))
+        minion_config = os.path.join(const.conf_dir, "minion")
+        minion_data = safeyaml.dumps(s_cfg.get("conf"))
         util.write_file(minion_config, minion_data)
 
-    if 'grains' in s_cfg:
+    if "grains" in s_cfg:
         # add grains to /etc/salt/grains
-        grains_config = os.path.join(const.conf_dir, 'grains')
-        grains_data = safeyaml.dumps(s_cfg.get('grains'))
+        grains_config = os.path.join(const.conf_dir, "grains")
+        grains_data = safeyaml.dumps(s_cfg.get("grains"))
         util.write_file(grains_config, grains_data)
 
     # ... copy the key pair if specified
-    if 'public_key' in s_cfg and 'private_key' in s_cfg:
+    if "public_key" in s_cfg and "private_key" in s_cfg:
         pki_dir_default = os.path.join(const.conf_dir, "pki/minion")
         if not os.path.isdir(pki_dir_default):
             pki_dir_default = os.path.join(const.conf_dir, "pki")
 
-        pki_dir = s_cfg.get('pki_dir', pki_dir_default)
+        pki_dir = s_cfg.get("pki_dir", pki_dir_default)
         with util.umask(0o77):
             util.ensure_dir(pki_dir)
-            pub_name = os.path.join(pki_dir, 'minion.pub')
-            pem_name = os.path.join(pki_dir, 'minion.pem')
-            util.write_file(pub_name, s_cfg['public_key'])
-            util.write_file(pem_name, s_cfg['private_key'])
+            pub_name = os.path.join(pki_dir, "minion.pub")
+            pem_name = os.path.join(pki_dir, "minion.pem")
+            util.write_file(pub_name, s_cfg["public_key"])
+            util.write_file(pem_name, s_cfg["private_key"])
 
     # we need to have the salt minion service enabled in rc in order to be
     # able to start the service. this does only apply on FreeBSD servers.
-    if cloud.distro.osfamily == 'freebsd':
+    if cloud.distro.osfamily == "freebsd":
         rhel_util.update_sysconfig_file(
-            '/etc/rc.conf', {'salt_minion_enable': 'YES'})
+            "/etc/rc.conf", {"salt_minion_enable": "YES"}
+        )
 
     # restart salt-minion. 'service' will start even if not started. if it
     # was started, it needs to be restarted for config change.
-    subp.subp(['service', const.srv_name, 'restart'], capture=False)
+    subp.subp(["service", const.srv_name, "restart"], capture=False)
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_scripts_per_boot.py b/cloudinit/config/cc_scripts_per_boot.py
index 1bf3f508..b7bfb7aa 100644
--- a/cloudinit/config/cc_scripts_per_boot.py
+++ b/cloudinit/config/cc_scripts_per_boot.py
@@ -25,23 +25,27 @@ module does not accept any config keys.
 import os
 
 from cloudinit import subp
-
 from cloudinit.settings import PER_ALWAYS
 
 frequency = PER_ALWAYS
 
-SCRIPT_SUBDIR = 'per-boot'
+SCRIPT_SUBDIR = "per-boot"
 
 
 def handle(name, _cfg, cloud, log, _args):
     # Comes from the following:
     # https://forums.aws.amazon.com/thread.jspa?threadID=96918
-    runparts_path = os.path.join(cloud.get_cpath(), 'scripts', SCRIPT_SUBDIR)
+    runparts_path = os.path.join(cloud.get_cpath(), "scripts", SCRIPT_SUBDIR)
     try:
         subp.runparts(runparts_path)
     except Exception:
-        log.warning("Failed to run module %s (%s in %s)",
-                    name, SCRIPT_SUBDIR, runparts_path)
+        log.warning(
+            "Failed to run module %s (%s in %s)",
+            name,
+            SCRIPT_SUBDIR,
+            runparts_path,
+        )
         raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_scripts_per_instance.py b/cloudinit/config/cc_scripts_per_instance.py
index 5966fb9a..ef102b1c 100644
--- a/cloudinit/config/cc_scripts_per_instance.py
+++ b/cloudinit/config/cc_scripts_per_instance.py
@@ -28,23 +28,27 @@ the system. As a result per-instance scripts will run again.
 import os
 
 from cloudinit import subp
-
 from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
 
-SCRIPT_SUBDIR = 'per-instance'
+SCRIPT_SUBDIR = "per-instance"
 
 
 def handle(name, _cfg, cloud, log, _args):
     # Comes from the following:
     # https://forums.aws.amazon.com/thread.jspa?threadID=96918
-    runparts_path = os.path.join(cloud.get_cpath(), 'scripts', SCRIPT_SUBDIR)
+    runparts_path = os.path.join(cloud.get_cpath(), "scripts", SCRIPT_SUBDIR)
     try:
         subp.runparts(runparts_path)
     except Exception:
-        log.warning("Failed to run module %s (%s in %s)",
-                    name, SCRIPT_SUBDIR, runparts_path)
+        log.warning(
+            "Failed to run module %s (%s in %s)",
+            name,
+            SCRIPT_SUBDIR,
+            runparts_path,
+        )
         raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_scripts_per_once.py b/cloudinit/config/cc_scripts_per_once.py
index bcca859e..bf4231e7 100644
--- a/cloudinit/config/cc_scripts_per_once.py
+++ b/cloudinit/config/cc_scripts_per_once.py
@@ -26,23 +26,27 @@ be run in alphabetical order. This module does not accept any config keys.
 import os
 
 from cloudinit import subp
-
 from cloudinit.settings import PER_ONCE
 
 frequency = PER_ONCE
 
-SCRIPT_SUBDIR = 'per-once'
+SCRIPT_SUBDIR = "per-once"
 
 
 def handle(name, _cfg, cloud, log, _args):
     # Comes from the following:
     # https://forums.aws.amazon.com/thread.jspa?threadID=96918
-    runparts_path = os.path.join(cloud.get_cpath(), 'scripts', SCRIPT_SUBDIR)
+    runparts_path = os.path.join(cloud.get_cpath(), "scripts", SCRIPT_SUBDIR)
     try:
         subp.runparts(runparts_path)
     except Exception:
-        log.warning("Failed to run module %s (%s in %s)",
-                    name, SCRIPT_SUBDIR, runparts_path)
+        log.warning(
+            "Failed to run module %s (%s in %s)",
+            name,
+            SCRIPT_SUBDIR,
+            runparts_path,
+        )
         raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_scripts_user.py b/cloudinit/config/cc_scripts_user.py
index 215703ef..e0d6c560 100644
--- a/cloudinit/config/cc_scripts_user.py
+++ b/cloudinit/config/cc_scripts_user.py
@@ -28,12 +28,11 @@ This module does not accept any config keys.
 import os
 
 from cloudinit import subp
-
 from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
 
-SCRIPT_SUBDIR = 'scripts'
+SCRIPT_SUBDIR = "scripts"
 
 
 def handle(name, _cfg, cloud, log, _args):
@@ -44,8 +43,13 @@ def handle(name, _cfg, cloud, log, _args):
     try:
         subp.runparts(runparts_path)
     except Exception:
-        log.warning("Failed to run module %s (%s in %s)",
-                    name, SCRIPT_SUBDIR, runparts_path)
+        log.warning(
+            "Failed to run module %s (%s in %s)",
+            name,
+            SCRIPT_SUBDIR,
+            runparts_path,
+        )
         raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_scripts_vendor.py b/cloudinit/config/cc_scripts_vendor.py
index e0a4bfff..1b30fa1b 100644
--- a/cloudinit/config/cc_scripts_vendor.py
+++ b/cloudinit/config/cc_scripts_vendor.py
@@ -28,29 +28,33 @@ entry under the ``vendor_data`` config key.
 
 import os
 
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import subp, util
 from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
 
-SCRIPT_SUBDIR = 'vendor'
+SCRIPT_SUBDIR = "vendor"
 
 
 def handle(name, cfg, cloud, log, _args):
     # This is written to by the vendor data handlers
     # any vendor data shell scripts get placed in runparts_path
-    runparts_path = os.path.join(cloud.get_ipath_cur(), 'scripts',
-                                 SCRIPT_SUBDIR)
+    runparts_path = os.path.join(
+        cloud.get_ipath_cur(), "scripts", SCRIPT_SUBDIR
+    )
 
-    prefix = util.get_cfg_by_path(cfg, ('vendor_data', 'prefix'), [])
+    prefix = util.get_cfg_by_path(cfg, ("vendor_data", "prefix"), [])
 
     try:
         subp.runparts(runparts_path, exe_prefix=prefix)
     except Exception:
-        log.warning("Failed to run module %s (%s in %s)",
-                    name, SCRIPT_SUBDIR, runparts_path)
+        log.warning(
+            "Failed to run module %s (%s in %s)",
+            name,
+            SCRIPT_SUBDIR,
+            runparts_path,
+        )
         raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_seed_random.py b/cloudinit/config/cc_seed_random.py
index 911789c7..67ba8ef5 100644
--- a/cloudinit/config/cc_seed_random.py
+++ b/cloudinit/config/cc_seed_random.py
@@ -68,9 +68,8 @@ import os
 from io import BytesIO
 
 from cloudinit import log as logging
+from cloudinit import subp, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import subp
-from cloudinit import util
 
 frequency = PER_INSTANCE
 LOG = logging.getLogger(__name__)
@@ -78,12 +77,12 @@ LOG = logging.getLogger(__name__)
 
 def _decode(data, encoding=None):
     if not data:
-        return b''
-    if not encoding or encoding.lower() in ['raw']:
+        return b""
+    if not encoding or encoding.lower() in ["raw"]:
         return util.encode_text(data)
-    elif encoding.lower() in ['base64', 'b64']:
+    elif encoding.lower() in ["base64", "b64"]:
         return base64.b64decode(data)
-    elif encoding.lower() in ['gzip', 'gz']:
+    elif encoding.lower() in ["gzip", "gz"]:
         return util.decomp_gzip(data, quiet=False, decode=None)
     else:
         raise IOError("Unknown random_seed encoding: %s" % (encoding))
@@ -100,7 +99,8 @@ def handle_random_seed_command(command, required, env=None):
     if not subp.which(cmd):
         if required:
             raise ValueError(
-                "command '{cmd}' not found but required=true".format(cmd=cmd))
+                "command '{cmd}' not found but required=true".format(cmd=cmd)
+            )
         else:
             LOG.debug("command '%s' not found for seed_command", cmd)
             return
@@ -108,34 +108,39 @@ def handle_random_seed_command(command, required, env=None):
 
 
 def handle(name, cfg, cloud, log, _args):
-    mycfg = cfg.get('random_seed', {})
-    seed_path = mycfg.get('file', '/dev/urandom')
-    seed_data = mycfg.get('data', b'')
+    mycfg = cfg.get("random_seed", {})
+    seed_path = mycfg.get("file", "/dev/urandom")
+    seed_data = mycfg.get("data", b"")
 
     seed_buf = BytesIO()
     if seed_data:
-        seed_buf.write(_decode(seed_data, encoding=mycfg.get('encoding')))
+        seed_buf.write(_decode(seed_data, encoding=mycfg.get("encoding")))
 
     # 'random_seed' is set up by Azure datasource, and comes already in
     # openstack meta_data.json
     metadata = cloud.datasource.metadata
-    if metadata and 'random_seed' in metadata:
-        seed_buf.write(util.encode_text(metadata['random_seed']))
+    if metadata and "random_seed" in metadata:
+        seed_buf.write(util.encode_text(metadata["random_seed"]))
 
     seed_data = seed_buf.getvalue()
     if len(seed_data):
-        log.debug("%s: adding %s bytes of random seed entropy to %s", name,
-                  len(seed_data), seed_path)
+        log.debug(
+            "%s: adding %s bytes of random seed entropy to %s",
+            name,
+            len(seed_data),
+            seed_path,
+        )
         util.append_file(seed_path, seed_data)
 
-    command = mycfg.get('command', None)
-    req = mycfg.get('command_required', False)
+    command = mycfg.get("command", None)
+    req = mycfg.get("command_required", False)
     try:
         env = os.environ.copy()
-        env['RANDOM_SEED_FILE'] = seed_path
+        env["RANDOM_SEED_FILE"] = seed_path
         handle_random_seed_command(command=command, required=req, env=env)
     except ValueError as e:
         log.warning("handling random command [%s] failed: %s", command, e)
         raise e
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_set_hostname.py b/cloudinit/config/cc_set_hostname.py
index a96bcc18..eb0ca328 100644
--- a/cloudinit/config/cc_set_hostname.py
+++ b/cloudinit/config/cc_set_hostname.py
@@ -48,9 +48,8 @@ based on initial hostname.
 
 import os
 
-
-from cloudinit.atomic_helper import write_json
 from cloudinit import util
+from cloudinit.atomic_helper import write_json
 
 
 class SetHostnameError(Exception):
@@ -63,16 +62,19 @@ class SetHostnameError(Exception):
 
 def handle(name, cfg, cloud, log, _args):
     if util.get_cfg_option_bool(cfg, "preserve_hostname", False):
-        log.debug(("Configuration option 'preserve_hostname' is set,"
-                   " not setting the hostname in module %s"), name)
+        log.debug(
+            "Configuration option 'preserve_hostname' is set,"
+            " not setting the hostname in module %s",
+            name,
+        )
         return
 
     # Set prefer_fqdn_over_hostname value in distro
-    hostname_fqdn = util.get_cfg_option_bool(cfg,
-                                             "prefer_fqdn_over_hostname",
-                                             None)
+    hostname_fqdn = util.get_cfg_option_bool(
+        cfg, "prefer_fqdn_over_hostname", None
+    )
     if hostname_fqdn is not None:
-        cloud.distro.set_option('prefer_fqdn_over_hostname', hostname_fqdn)
+        cloud.distro.set_option("prefer_fqdn_over_hostname", hostname_fqdn)
 
     (hostname, fqdn) = util.get_hostname_fqdn(cfg, cloud)
     # Check for previous successful invocation of set-hostname
@@ -82,14 +84,15 @@ def handle(name, cfg, cloud, log, _args):
     # previous-hostname file which only contains the base hostname.
     # TODO consolidate previous-hostname and set-hostname artifact files and
     # distro._read_hostname implementation so we only validate  one artifact.
-    prev_fn = os.path.join(cloud.get_cpath('data'), "set-hostname")
+    prev_fn = os.path.join(cloud.get_cpath("data"), "set-hostname")
     prev_hostname = {}
     if os.path.exists(prev_fn):
         prev_hostname = util.load_json(util.load_file(prev_fn))
-    hostname_changed = (hostname != prev_hostname.get('hostname') or
-                        fqdn != prev_hostname.get('fqdn'))
+    hostname_changed = hostname != prev_hostname.get(
+        "hostname"
+    ) or fqdn != prev_hostname.get("fqdn")
     if not hostname_changed:
-        log.debug('No hostname changes. Skipping set-hostname')
+        log.debug("No hostname changes. Skipping set-hostname")
         return
     log.debug("Setting the hostname to %s (%s)", fqdn, hostname)
     try:
@@ -98,6 +101,7 @@ def handle(name, cfg, cloud, log, _args):
         msg = "Failed to set the hostname to %s (%s)" % (fqdn, hostname)
         util.logexc(log, msg)
         raise SetHostnameError("%s: %s" % (msg, e)) from e
-    write_json(prev_fn, {'hostname': hostname, 'fqdn': fqdn})
+    write_json(prev_fn, {"hostname": hostname, "fqdn": fqdn})
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_set_passwords.py b/cloudinit/config/cc_set_passwords.py
index 3843aaf7..d8df8e23 100755
--- a/cloudinit/config/cc_set_passwords.py
+++ b/cloudinit/config/cc_set_passwords.py
@@ -78,20 +78,17 @@ password.
 """
 
 import re
+from string import ascii_letters, digits
 
-from cloudinit.distros import ug_util
 from cloudinit import log as logging
+from cloudinit import subp, util
+from cloudinit.distros import ug_util
 from cloudinit.ssh_util import update_ssh_config
-from cloudinit import subp
-from cloudinit import util
-
-from string import ascii_letters, digits
 
 LOG = logging.getLogger(__name__)
 
 # We are removing certain 'painful' letters/numbers
-PW_SET = (''.join([x for x in ascii_letters + digits
-                   if x not in 'loLOI01']))
+PW_SET = "".join([x for x in ascii_letters + digits if x not in "loLOI01"])
 
 
 def handle_ssh_pwauth(pw_auth, distro):
@@ -105,12 +102,12 @@ def handle_ssh_pwauth(pw_auth, distro):
     cfg_name = "PasswordAuthentication"
 
     if util.is_true(pw_auth):
-        cfg_val = 'yes'
+        cfg_val = "yes"
     elif util.is_false(pw_auth):
-        cfg_val = 'no'
+        cfg_val = "no"
     else:
         bmsg = "Leaving SSH config '%s' unchanged." % cfg_name
-        if pw_auth is None or pw_auth.lower() == 'unchanged':
+        if pw_auth is None or pw_auth.lower() == "unchanged":
             LOG.debug("%s ssh_pwauth=%s", bmsg, pw_auth)
         else:
             LOG.warning("%s Unrecognized value: ssh_pwauth=%s", bmsg, pw_auth)
@@ -121,7 +118,7 @@ def handle_ssh_pwauth(pw_auth, distro):
         LOG.debug("No need to restart SSH service, %s not updated.", cfg_name)
         return
 
-    distro.manage_service('restart', distro.get_option('ssh_svcname', 'ssh'))
+    distro.manage_service("restart", distro.get_option("ssh_svcname", "ssh"))
     LOG.debug("Restarted the SSH daemon.")
 
 
@@ -129,27 +126,27 @@ def handle(_name, cfg, cloud, log, args):
     if args:
         # if run from command line, and give args, wipe the chpasswd['list']
         password = args[0]
-        if 'chpasswd' in cfg and 'list' in cfg['chpasswd']:
-            del cfg['chpasswd']['list']
+        if "chpasswd" in cfg and "list" in cfg["chpasswd"]:
+            del cfg["chpasswd"]["list"]
     else:
         password = util.get_cfg_option_str(cfg, "password", None)
 
     expire = True
     plist = None
 
-    if 'chpasswd' in cfg:
-        chfg = cfg['chpasswd']
-        if 'list' in chfg and chfg['list']:
-            if isinstance(chfg['list'], list):
+    if "chpasswd" in cfg:
+        chfg = cfg["chpasswd"]
+        if "list" in chfg and chfg["list"]:
+            if isinstance(chfg["list"], list):
                 log.debug("Handling input for chpasswd as list.")
-                plist = util.get_cfg_option_list(chfg, 'list', plist)
+                plist = util.get_cfg_option_list(chfg, "list", plist)
             else:
                 log.debug("Handling input for chpasswd as multiline string.")
-                plist = util.get_cfg_option_str(chfg, 'list', plist)
+                plist = util.get_cfg_option_str(chfg, "list", plist)
                 if plist:
                     plist = plist.splitlines()
 
-        expire = util.get_cfg_option_bool(chfg, 'expire', expire)
+        expire = util.get_cfg_option_bool(chfg, "expire", expire)
 
     if not plist and password:
         (users, _groups) = ug_util.normalize_users_groups(cfg, cloud.distro)
@@ -168,9 +165,9 @@ def handle(_name, cfg, cloud, log, args):
         users = []
         # N.B. This regex is included in the documentation (i.e. the module
         # docstring), so any changes to it should be reflected there.
-        prog = re.compile(r'\$(1|2a|2y|5|6)(\$.+){2}')
+        prog = re.compile(r"\$(1|2a|2y|5|6)(\$.+){2}")
         for line in plist:
-            u, p = line.split(':', 1)
+            u, p = line.split(":", 1)
             if prog.match(p) is not None and ":" not in p:
                 hashed_plist_in.append(line)
                 hashed_users.append(u)
@@ -182,7 +179,7 @@ def handle(_name, cfg, cloud, log, args):
                     randlist.append("%s:%s" % (u, p))
                 plist_in.append("%s:%s" % (u, p))
                 users.append(u)
-        ch_in = '\n'.join(plist_in) + '\n'
+        ch_in = "\n".join(plist_in) + "\n"
         if users:
             try:
                 log.debug("Changing password for %s:", users)
@@ -190,9 +187,10 @@ def handle(_name, cfg, cloud, log, args):
             except Exception as e:
                 errors.append(e)
                 util.logexc(
-                    log, "Failed to set passwords with chpasswd for %s", users)
+                    log, "Failed to set passwords with chpasswd for %s", users
+                )
 
-        hashed_ch_in = '\n'.join(hashed_plist_in) + '\n'
+        hashed_ch_in = "\n".join(hashed_plist_in) + "\n"
         if hashed_users:
             try:
                 log.debug("Setting hashed password for %s:", hashed_users)
@@ -200,12 +198,16 @@ def handle(_name, cfg, cloud, log, args):
             except Exception as e:
                 errors.append(e)
                 util.logexc(
-                    log, "Failed to set hashed passwords with chpasswd for %s",
-                    hashed_users)
+                    log,
+                    "Failed to set hashed passwords with chpasswd for %s",
+                    hashed_users,
+                )
 
         if len(randlist):
-            blurb = ("Set the following 'random' passwords\n",
-                     '\n'.join(randlist))
+            blurb = (
+                "Set the following 'random' passwords\n",
+                "\n".join(randlist),
+            )
             util.multi_log(
                 "%s\n%s\n" % blurb, stderr=False, fallback_to_stdout=False
             )
@@ -222,7 +224,7 @@ def handle(_name, cfg, cloud, log, args):
             if expired_users:
                 log.debug("Expired passwords for: %s users", expired_users)
 
-    handle_ssh_pwauth(cfg.get('ssh_pwauth'), cloud.distro)
+    handle_ssh_pwauth(cfg.get("ssh_pwauth"), cloud.distro)
 
     if len(errors):
         log.debug("%s errors occured, re-raising the last one", len(errors))
@@ -239,7 +241,8 @@ def chpasswd(distro, plist_in, hashed=False):
             u, p = pentry.split(":")
             distro.set_passwd(u, p, hashed=hashed)
     else:
-        cmd = ['chpasswd'] + (['-e'] if hashed else [])
+        cmd = ["chpasswd"] + (["-e"] if hashed else [])
         subp.subp(cmd, plist_in)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_snap.py b/cloudinit/config/cc_snap.py
index 21f30b57..9c38046c 100644
--- a/cloudinit/config/cc_snap.py
+++ b/cloudinit/config/cc_snap.py
@@ -8,23 +8,22 @@ import sys
 from textwrap import dedent
 
 from cloudinit import log as logging
+from cloudinit import subp, util
 from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
 from cloudinit.subp import prepend_base_command
-from cloudinit import subp
-from cloudinit import util
 
-
-distros = ['ubuntu']
+distros = ["ubuntu"]
 frequency = PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
 meta = {
-    'id': 'cc_snap',
-    'name': 'Snap',
-    'title': 'Install, configure and manage snapd and snap packages',
-    'description': dedent("""\
+    "id": "cc_snap",
+    "name": "Snap",
+    "title": "Install, configure and manage snapd and snap packages",
+    "description": dedent(
+        """\
         This module provides a simple configuration namespace in cloud-init to
         both setup snapd and install snaps.
 
@@ -55,9 +54,12 @@ meta = {
         **Development only**: The ``squashfuse_in_container`` boolean can be
         set true to install squashfuse package when in a container to enable
         snap installs. Default is false.
-        """),
-    'distros': distros,
-    'examples': [dedent("""\
+        """
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         snap:
             assertions:
               00: |
@@ -68,14 +70,20 @@ meta = {
               00: snap create-user --sudoer --known <snap-user>@mydomain.com
               01: snap install canonical-livepatch
               02: canonical-livepatch enable <AUTH_TOKEN>
-    """), dedent("""\
+    """
+        ),
+        dedent(
+            """\
         # LXC-based containers require squashfuse before snaps can be installed
         snap:
             commands:
                 00: apt-get install squashfuse -y
                 11: snap install emoj
 
-    """), dedent("""\
+    """
+        ),
+        dedent(
+            """\
         # Convenience: the snap command can be omitted when specifying commands
         # as a list and 'snap' will automatically be prepended.
         # The following commands are equivalent:
@@ -85,7 +93,10 @@ meta = {
                 01: ['snap', 'install', 'vlc']
                 02: snap install vlc
                 03: 'snap install vlc'
-    """), dedent("""\
+    """
+        ),
+        dedent(
+            """\
         # You can use a list of commands
         snap:
             commands:
@@ -93,57 +104,61 @@ meta = {
                 - ['snap', 'install', 'vlc']
                 - snap install vlc
                 - 'snap install vlc'
-    """), dedent("""\
+    """
+        ),
+        dedent(
+            """\
         # You can use a list of assertions
         snap:
             assertions:
                 - signed_assertion_blob_here
                 - |
                     signed_assertion_blob_here
-    """)],
-    'frequency': PER_INSTANCE,
+    """
+        ),
+    ],
+    "frequency": PER_INSTANCE,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'snap': {
-            'type': 'object',
-            'properties': {
-                'assertions': {
-                    'type': ['object', 'array'],  # Array of strings or dict
-                    'items': {'type': 'string'},
-                    'additionalItems': False,  # Reject items non-string
-                    'minItems': 1,
-                    'minProperties': 1,
-                    'uniqueItems': True,
-                    'additionalProperties': {'type': 'string'},
+    "type": "object",
+    "properties": {
+        "snap": {
+            "type": "object",
+            "properties": {
+                "assertions": {
+                    "type": ["object", "array"],  # Array of strings or dict
+                    "items": {"type": "string"},
+                    "additionalItems": False,  # Reject items non-string
+                    "minItems": 1,
+                    "minProperties": 1,
+                    "uniqueItems": True,
+                    "additionalProperties": {"type": "string"},
                 },
-                'commands': {
-                    'type': ['object', 'array'],  # Array of strings or dict
-                    'items': {
-                        'oneOf': [
-                            {'type': 'array', 'items': {'type': 'string'}},
-                            {'type': 'string'}]
+                "commands": {
+                    "type": ["object", "array"],  # Array of strings or dict
+                    "items": {
+                        "oneOf": [
+                            {"type": "array", "items": {"type": "string"}},
+                            {"type": "string"},
+                        ]
                     },
-                    'additionalItems': False,  # Reject non-string & non-list
-                    'minItems': 1,
-                    'minProperties': 1,
-                    'additionalProperties': {
-                        'oneOf': [
-                            {'type': 'string'},
-                            {'type': 'array', 'items': {'type': 'string'}},
+                    "additionalItems": False,  # Reject non-string & non-list
+                    "minItems": 1,
+                    "minProperties": 1,
+                    "additionalProperties": {
+                        "oneOf": [
+                            {"type": "string"},
+                            {"type": "array", "items": {"type": "string"}},
                         ],
                     },
                 },
-                'squashfuse_in_container': {
-                    'type': 'boolean'
-                }
+                "squashfuse_in_container": {"type": "boolean"},
             },
-            'additionalProperties': False,  # Reject keys not in schema
-            'minProperties': 1
+            "additionalProperties": False,  # Reject keys not in schema
+            "minProperties": 1,
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -162,45 +177,49 @@ def add_assertions(assertions):
     """
     if not assertions:
         return
-    LOG.debug('Importing user-provided snap assertions')
+    LOG.debug("Importing user-provided snap assertions")
     if isinstance(assertions, dict):
         assertions = assertions.values()
     elif not isinstance(assertions, list):
         raise TypeError(
-            'assertion parameter was not a list or dict: {assertions}'.format(
-                assertions=assertions))
+            "assertion parameter was not a list or dict: {assertions}".format(
+                assertions=assertions
+            )
+        )
 
-    snap_cmd = [SNAP_CMD, 'ack']
+    snap_cmd = [SNAP_CMD, "ack"]
     combined = "\n".join(assertions)
 
     for asrt in assertions:
-        LOG.debug('Snap acking: %s', asrt.split('\n')[0:2])
+        LOG.debug("Snap acking: %s", asrt.split("\n")[0:2])
 
-    util.write_file(ASSERTIONS_FILE, combined.encode('utf-8'))
+    util.write_file(ASSERTIONS_FILE, combined.encode("utf-8"))
     subp.subp(snap_cmd + [ASSERTIONS_FILE], capture=True)
 
 
 def run_commands(commands):
     """Run the provided commands provided in snap:commands configuration.
 
-     Commands are run individually. Any errors are collected and reported
-     after attempting all commands.
+    Commands are run individually. Any errors are collected and reported
+    after attempting all commands.
 
-     @param commands: A list or dict containing commands to run. Keys of a
-         dict will be used to order the commands provided as dict values.
-     """
+    @param commands: A list or dict containing commands to run. Keys of a
+        dict will be used to order the commands provided as dict values.
+    """
     if not commands:
         return
-    LOG.debug('Running user-provided snap commands')
+    LOG.debug("Running user-provided snap commands")
     if isinstance(commands, dict):
         # Sort commands based on dictionary key
         commands = [v for _, v in sorted(commands.items())]
     elif not isinstance(commands, list):
         raise TypeError(
-            'commands parameter was not a list or dict: {commands}'.format(
-                commands=commands))
+            "commands parameter was not a list or dict: {commands}".format(
+                commands=commands
+            )
+        )
 
-    fixed_snap_commands = prepend_base_command('snap', commands)
+    fixed_snap_commands = prepend_base_command("snap", commands)
 
     cmd_failures = []
     for command in fixed_snap_commands:
@@ -210,8 +229,9 @@ def run_commands(commands):
         except subp.ProcessExecutionError as e:
             cmd_failures.append(str(e))
     if cmd_failures:
-        msg = 'Failures running snap commands:\n{cmd_failures}'.format(
-            cmd_failures=cmd_failures)
+        msg = "Failures running snap commands:\n{cmd_failures}".format(
+            cmd_failures=cmd_failures
+        )
         util.logexc(LOG, msg)
         raise RuntimeError(msg)
 
@@ -227,23 +247,25 @@ def maybe_install_squashfuse(cloud):
         util.logexc(LOG, "Package update failed")
         raise
     try:
-        cloud.distro.install_packages(['squashfuse'])
+        cloud.distro.install_packages(["squashfuse"])
     except Exception:
         util.logexc(LOG, "Failed to install squashfuse")
         raise
 
 
 def handle(name, cfg, cloud, log, args):
-    cfgin = cfg.get('snap', {})
+    cfgin = cfg.get("snap", {})
     if not cfgin:
-        LOG.debug(("Skipping module named %s,"
-                   " no 'snap' key in configuration"), name)
+        LOG.debug(
+            "Skipping module named %s, no 'snap' key in configuration", name
+        )
         return
 
     validate_cloudconfig_schema(cfg, schema)
-    if util.is_true(cfgin.get('squashfuse_in_container', False)):
+    if util.is_true(cfgin.get("squashfuse_in_container", False)):
         maybe_install_squashfuse(cloud)
-    add_assertions(cfgin.get('assertions', []))
-    run_commands(cfgin.get('commands', []))
+    add_assertions(cfgin.get("assertions", []))
+    run_commands(cfgin.get("commands", []))
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_spacewalk.py b/cloudinit/config/cc_spacewalk.py
index 95083607..3fa6c388 100644
--- a/cloudinit/config/cc_spacewalk.py
+++ b/cloudinit/config/cc_spacewalk.py
@@ -29,9 +29,8 @@ For more information about spacewalk see: https://fedorahosted.org/spacewalk/
 
 from cloudinit import subp
 
-
-distros = ['redhat', 'fedora']
-required_packages = ['rhn-setup']
+distros = ["redhat", "fedora"]
+required_packages = ["rhn-setup"]
 def_ca_cert_path = "/usr/share/rhn/RHN-ORG-TRUSTED-SSL-CERT"
 
 
@@ -41,7 +40,7 @@ def is_registered():
     # assume we aren't registered; which is sorta ghetto...
     already_registered = False
     try:
-        subp.subp(['rhn-profile-sync', '--verbose'], capture=False)
+        subp.subp(["rhn-profile-sync", "--verbose"], capture=False)
         already_registered = True
     except subp.ProcessExecutionError as e:
         if e.exit_code != 1:
@@ -49,42 +48,58 @@ def is_registered():
     return already_registered
 
 
-def do_register(server, profile_name,
-                ca_cert_path=def_ca_cert_path,
-                proxy=None, log=None,
-                activation_key=None):
+def do_register(
+    server,
+    profile_name,
+    ca_cert_path=def_ca_cert_path,
+    proxy=None,
+    log=None,
+    activation_key=None,
+):
     if log is not None:
-        log.info("Registering using `rhnreg_ks` profile '%s'"
-                 " into server '%s'", profile_name, server)
-    cmd = ['rhnreg_ks']
-    cmd.extend(['--serverUrl', 'https://%s/XMLRPC' % server])
-    cmd.extend(['--profilename', str(profile_name)])
+        log.info(
+            "Registering using `rhnreg_ks` profile '%s' into server '%s'",
+            profile_name,
+            server,
+        )
+    cmd = ["rhnreg_ks"]
+    cmd.extend(["--serverUrl", "https://%s/XMLRPC" % server])
+    cmd.extend(["--profilename", str(profile_name)])
     if proxy:
         cmd.extend(["--proxy", str(proxy)])
     if ca_cert_path:
-        cmd.extend(['--sslCACert', str(ca_cert_path)])
+        cmd.extend(["--sslCACert", str(ca_cert_path)])
     if activation_key:
-        cmd.extend(['--activationkey', str(activation_key)])
+        cmd.extend(["--activationkey", str(activation_key)])
     subp.subp(cmd, capture=False)
 
 
 def handle(name, cfg, cloud, log, _args):
-    if 'spacewalk' not in cfg:
-        log.debug(("Skipping module named %s,"
-                   " no 'spacewalk' key in configuration"), name)
+    if "spacewalk" not in cfg:
+        log.debug(
+            "Skipping module named %s, no 'spacewalk' key in configuration",
+            name,
+        )
         return
-    cfg = cfg['spacewalk']
-    spacewalk_server = cfg.get('server')
+    cfg = cfg["spacewalk"]
+    spacewalk_server = cfg.get("server")
     if spacewalk_server:
         # Need to have this installed before further things will work.
         cloud.distro.install_packages(required_packages)
         if not is_registered():
-            do_register(spacewalk_server,
-                        cloud.datasource.get_hostname(fqdn=True),
-                        proxy=cfg.get("proxy"), log=log,
-                        activation_key=cfg.get('activation_key'))
+            do_register(
+                spacewalk_server,
+                cloud.datasource.get_hostname(fqdn=True),
+                proxy=cfg.get("proxy"),
+                log=log,
+                activation_key=cfg.get("activation_key"),
+            )
     else:
-        log.debug("Skipping module named %s, 'spacewalk/server' key"
-                  " was not found in configuration", name)
+        log.debug(
+            "Skipping module named %s, 'spacewalk/server' key"
+            " was not found in configuration",
+            name,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_ssh.py b/cloudinit/config/cc_ssh.py
index 1053ab67..a1f05176 100755
--- a/cloudinit/config/cc_ssh.py
+++ b/cloudinit/config/cc_ssh.py
@@ -162,27 +162,26 @@ import glob
 import os
 import sys
 
+from cloudinit import ssh_util, subp, util
 from cloudinit.distros import ug_util
-from cloudinit import ssh_util
-from cloudinit import subp
-from cloudinit import util
 
-
-GENERATE_KEY_NAMES = ['rsa', 'dsa', 'ecdsa', 'ed25519']
-KEY_FILE_TPL = '/etc/ssh/ssh_host_%s_key'
+GENERATE_KEY_NAMES = ["rsa", "dsa", "ecdsa", "ed25519"]
+KEY_FILE_TPL = "/etc/ssh/ssh_host_%s_key"
 PUBLISH_HOST_KEYS = True
 # Don't publish the dsa hostkey by default since OpenSSH recommends not using
 # it.
-HOST_KEY_PUBLISH_BLACKLIST = ['dsa']
+HOST_KEY_PUBLISH_BLACKLIST = ["dsa"]
 
 CONFIG_KEY_TO_FILE = {}
 PRIV_TO_PUB = {}
 for k in GENERATE_KEY_NAMES:
     CONFIG_KEY_TO_FILE.update({"%s_private" % k: (KEY_FILE_TPL % k, 0o600)})
     CONFIG_KEY_TO_FILE.update(
-        {"%s_public" % k: (KEY_FILE_TPL % k + ".pub", 0o600)})
+        {"%s_public" % k: (KEY_FILE_TPL % k + ".pub", 0o600)}
+    )
     CONFIG_KEY_TO_FILE.update(
-        {"%s_certificate" % k: (KEY_FILE_TPL % k + "-cert.pub", 0o600)})
+        {"%s_certificate" % k: (KEY_FILE_TPL % k + "-cert.pub", 0o600)}
+    )
     PRIV_TO_PUB["%s_private" % k] = "%s_public" % k
 
 KEY_GEN_TPL = 'o=$(ssh-keygen -yf "%s") && echo "$o" root@localhost > "%s"'
@@ -209,43 +208,48 @@ def handle(_name, cfg, cloud, log, _args):
             tgt_perms = CONFIG_KEY_TO_FILE[key][1]
             util.write_file(tgt_fn, val, tgt_perms)
             # set server to present the most recently identified certificate
-            if '_certificate' in key:
-                cert_config = {'HostCertificate': tgt_fn}
+            if "_certificate" in key:
+                cert_config = {"HostCertificate": tgt_fn}
                 ssh_util.update_ssh_config(cert_config)
 
         for (priv, pub) in PRIV_TO_PUB.items():
-            if pub in cfg['ssh_keys'] or priv not in cfg['ssh_keys']:
+            if pub in cfg["ssh_keys"] or priv not in cfg["ssh_keys"]:
                 continue
             pair = (CONFIG_KEY_TO_FILE[priv][0], CONFIG_KEY_TO_FILE[pub][0])
-            cmd = ['sh', '-xc', KEY_GEN_TPL % pair]
+            cmd = ["sh", "-xc", KEY_GEN_TPL % pair]
             try:
                 # TODO(harlowja): Is this guard needed?
                 with util.SeLinuxGuard("/etc/ssh", recursive=True):
                     subp.subp(cmd, capture=False)
                 log.debug("Generated a key for %s from %s", pair[0], pair[1])
             except Exception:
-                util.logexc(log, "Failed generated a key for %s from %s",
-                            pair[0], pair[1])
+                util.logexc(
+                    log,
+                    "Failed generated a key for %s from %s",
+                    pair[0],
+                    pair[1],
+                )
     else:
         # if not, generate them
-        genkeys = util.get_cfg_option_list(cfg,
-                                           'ssh_genkeytypes',
-                                           GENERATE_KEY_NAMES)
+        genkeys = util.get_cfg_option_list(
+            cfg, "ssh_genkeytypes", GENERATE_KEY_NAMES
+        )
         lang_c = os.environ.copy()
-        lang_c['LANG'] = 'C'
+        lang_c["LANG"] = "C"
         for keytype in genkeys:
             keyfile = KEY_FILE_TPL % (keytype)
             if os.path.exists(keyfile):
                 continue
             util.ensure_dir(os.path.dirname(keyfile))
-            cmd = ['ssh-keygen', '-t', keytype, '-N', '', '-f', keyfile]
+            cmd = ["ssh-keygen", "-t", keytype, "-N", "", "-f", keyfile]
 
             # TODO(harlowja): Is this guard needed?
             with util.SeLinuxGuard("/etc/ssh", recursive=True):
                 try:
                     out, err = subp.subp(cmd, capture=True, env=lang_c)
-                    if not util.get_cfg_option_bool(cfg, 'ssh_quiet_keygen',
-                                                    False):
+                    if not util.get_cfg_option_bool(
+                        cfg, "ssh_quiet_keygen", False
+                    ):
                         sys.stdout.write(util.decode_binary(out))
 
                     gid = util.get_group_id("ssh_keys")
@@ -256,19 +260,27 @@ def handle(_name, cfg, cloud, log, _args):
                         os.chmod(keyfile + ".pub", 0o644)
                 except subp.ProcessExecutionError as e:
                     err = util.decode_binary(e.stderr).lower()
-                    if (e.exit_code == 1 and
-                            err.lower().startswith("unknown key")):
+                    if e.exit_code == 1 and err.lower().startswith(
+                        "unknown key"
+                    ):
                         log.debug("ssh-keygen: unknown key type '%s'", keytype)
                     else:
-                        util.logexc(log, "Failed generating key type %s to "
-                                    "file %s", keytype, keyfile)
+                        util.logexc(
+                            log,
+                            "Failed generating key type %s to file %s",
+                            keytype,
+                            keyfile,
+                        )
 
     if "ssh_publish_hostkeys" in cfg:
         host_key_blacklist = util.get_cfg_option_list(
-            cfg["ssh_publish_hostkeys"], "blacklist",
-            HOST_KEY_PUBLISH_BLACKLIST)
+            cfg["ssh_publish_hostkeys"],
+            "blacklist",
+            HOST_KEY_PUBLISH_BLACKLIST,
+        )
         publish_hostkeys = util.get_cfg_option_bool(
-            cfg["ssh_publish_hostkeys"], "enabled", PUBLISH_HOST_KEYS)
+            cfg["ssh_publish_hostkeys"], "enabled", PUBLISH_HOST_KEYS
+        )
     else:
         host_key_blacklist = HOST_KEY_PUBLISH_BLACKLIST
         publish_hostkeys = PUBLISH_HOST_KEYS
@@ -284,15 +296,18 @@ def handle(_name, cfg, cloud, log, _args):
         (users, _groups) = ug_util.normalize_users_groups(cfg, cloud.distro)
         (user, _user_config) = ug_util.extract_default(users)
         disable_root = util.get_cfg_option_bool(cfg, "disable_root", True)
-        disable_root_opts = util.get_cfg_option_str(cfg, "disable_root_opts",
-                                                    ssh_util.DISABLE_USER_OPTS)
+        disable_root_opts = util.get_cfg_option_str(
+            cfg, "disable_root_opts", ssh_util.DISABLE_USER_OPTS
+        )
 
         keys = []
-        if util.get_cfg_option_bool(cfg, 'allow_public_ssh_keys', True):
+        if util.get_cfg_option_bool(cfg, "allow_public_ssh_keys", True):
             keys = cloud.get_public_ssh_keys() or []
         else:
-            log.debug('Skipping import of publish SSH keys per '
-                      'config setting: allow_public_ssh_keys=False')
+            log.debug(
+                "Skipping import of publish SSH keys per "
+                "config setting: allow_public_ssh_keys=False"
+            )
 
         if "ssh_authorized_keys" in cfg:
             cfgkeys = cfg["ssh_authorized_keys"]
@@ -312,12 +327,12 @@ def apply_credentials(keys, user, disable_root, disable_root_opts):
     if disable_root:
         if not user:
             user = "NONE"
-        key_prefix = disable_root_opts.replace('$USER', user)
-        key_prefix = key_prefix.replace('$DISABLE_USER', 'root')
+        key_prefix = disable_root_opts.replace("$USER", user)
+        key_prefix = key_prefix.replace("$DISABLE_USER", "root")
     else:
-        key_prefix = ''
+        key_prefix = ""
 
-    ssh_util.setup_user_keys(keys, 'root', options=key_prefix)
+    ssh_util.setup_user_keys(keys, "root", options=key_prefix)
 
 
 def get_public_host_keys(blacklist=None):
@@ -327,18 +342,21 @@ def get_public_host_keys(blacklist=None):
     @returns: List of keys, each formatted as a two-element tuple.
         e.g. [('ssh-rsa', 'AAAAB3Nz...'), ('ssh-ed25519', 'AAAAC3Nx...')]
     """
-    public_key_file_tmpl = '%s.pub' % (KEY_FILE_TPL,)
+    public_key_file_tmpl = "%s.pub" % (KEY_FILE_TPL,)
     key_list = []
     blacklist_files = []
     if blacklist:
         # Convert blacklist to filenames:
         # 'dsa' -> '/etc/ssh/ssh_host_dsa_key.pub'
-        blacklist_files = [public_key_file_tmpl % (key_type,)
-                           for key_type in blacklist]
+        blacklist_files = [
+            public_key_file_tmpl % (key_type,) for key_type in blacklist
+        ]
     # Get list of public key files and filter out blacklisted files.
-    file_list = [hostfile for hostfile
-                 in glob.glob(public_key_file_tmpl % ('*',))
-                 if hostfile not in blacklist_files]
+    file_list = [
+        hostfile
+        for hostfile in glob.glob(public_key_file_tmpl % ("*",))
+        if hostfile not in blacklist_files
+    ]
 
     # Read host key files, retrieve first two fields as a tuple and
     # append that tuple to key_list.
diff --git a/cloudinit/config/cc_ssh_authkey_fingerprints.py b/cloudinit/config/cc_ssh_authkey_fingerprints.py
index 5323522c..020c3469 100755
--- a/cloudinit/config/cc_ssh_authkey_fingerprints.py
+++ b/cloudinit/config/cc_ssh_authkey_fingerprints.py
@@ -28,23 +28,21 @@ the keys can be specified, but defaults to ``sha256``.
 import base64
 import hashlib
 
-from cloudinit.simpletable import SimpleTable
-
+from cloudinit import ssh_util, util
 from cloudinit.distros import ug_util
-from cloudinit import ssh_util
-from cloudinit import util
+from cloudinit.simpletable import SimpleTable
 
 
 def _split_hash(bin_hash):
     split_up = []
     for i in range(0, len(bin_hash), 2):
-        split_up.append(bin_hash[i:i + 2])
+        split_up.append(bin_hash[i : i + 2])
     return split_up
 
 
-def _gen_fingerprint(b64_text, hash_meth='sha256'):
+def _gen_fingerprint(b64_text, hash_meth="sha256"):
     if not b64_text:
-        return ''
+        return ""
     # TBD(harlowja): Maybe we should feed this into 'ssh -lf'?
     try:
         hasher = hashlib.new(hash_meth)
@@ -54,58 +52,75 @@ def _gen_fingerprint(b64_text, hash_meth='sha256'):
         # Raised when b64 not really b64...
         # or when the hash type is not really
         # a known/supported hash type...
-        return '?'
+        return "?"
 
 
 def _is_printable_key(entry):
     if any([entry.keytype, entry.base64, entry.comment, entry.options]):
-        if (entry.keytype and entry.keytype.lower().strip()
-                in ssh_util.VALID_KEY_TYPES):
+        if (
+            entry.keytype
+            and entry.keytype.lower().strip() in ssh_util.VALID_KEY_TYPES
+        ):
             return True
     return False
 
 
-def _pprint_key_entries(user, key_fn, key_entries, hash_meth='sha256',
-                        prefix='ci-info: '):
+def _pprint_key_entries(
+    user, key_fn, key_entries, hash_meth="sha256", prefix="ci-info: "
+):
     if not key_entries:
-        message = ("%sno authorized SSH keys fingerprints found for user %s.\n"
-                   % (prefix, user))
+        message = (
+            "%sno authorized SSH keys fingerprints found for user %s.\n"
+            % (prefix, user)
+        )
         util.multi_log(message, console=True, stderr=False)
         return
-    tbl_fields = ['Keytype', 'Fingerprint (%s)' % (hash_meth), 'Options',
-                  'Comment']
+    tbl_fields = [
+        "Keytype",
+        "Fingerprint (%s)" % (hash_meth),
+        "Options",
+        "Comment",
+    ]
     tbl = SimpleTable(tbl_fields)
     for entry in key_entries:
         if _is_printable_key(entry):
-            row = [entry.keytype or '-',
-                   _gen_fingerprint(entry.base64, hash_meth) or '-',
-                   entry.options or '-',
-                   entry.comment or '-']
+            row = [
+                entry.keytype or "-",
+                _gen_fingerprint(entry.base64, hash_meth) or "-",
+                entry.options or "-",
+                entry.comment or "-",
+            ]
             tbl.add_row(row)
     authtbl_s = tbl.get_string()
     authtbl_lines = authtbl_s.splitlines()
     max_len = len(max(authtbl_lines, key=len))
     lines = [
-        util.center("Authorized keys from %s for user %s" %
-                    (key_fn, user), "+", max_len),
+        util.center(
+            "Authorized keys from %s for user %s" % (key_fn, user),
+            "+",
+            max_len,
+        ),
     ]
     lines.extend(authtbl_lines)
     for line in lines:
-        util.multi_log(text="%s%s\n" % (prefix, line),
-                       stderr=False, console=True)
+        util.multi_log(
+            text="%s%s\n" % (prefix, line), stderr=False, console=True
+        )
 
 
 def handle(name, cfg, cloud, log, _args):
-    if util.is_true(cfg.get('no_ssh_fingerprints', False)):
-        log.debug(("Skipping module named %s, "
-                   "logging of SSH fingerprints disabled"), name)
+    if util.is_true(cfg.get("no_ssh_fingerprints", False)):
+        log.debug(
+            "Skipping module named %s, logging of SSH fingerprints disabled",
+            name,
+        )
         return
 
     hash_meth = util.get_cfg_option_str(cfg, "authkey_hash", "sha256")
     (users, _groups) = ug_util.normalize_users_groups(cfg, cloud.distro)
     for (user_name, _cfg) in users.items():
         (key_fn, key_entries) = ssh_util.extract_authorized_keys(user_name)
-        _pprint_key_entries(user_name, key_fn,
-                            key_entries, hash_meth)
+        _pprint_key_entries(user_name, key_fn, key_entries, hash_meth)
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_ssh_import_id.py b/cloudinit/config/cc_ssh_import_id.py
index 856e5a9e..a9575c59 100755
--- a/cloudinit/config/cc_ssh_import_id.py
+++ b/cloudinit/config/cc_ssh_import_id.py
@@ -30,13 +30,13 @@ either ``lp:`` for launchpad or ``gh:`` for github to the username.
         - lp:user
 """
 
-from cloudinit.distros import ug_util
-from cloudinit import subp
-from cloudinit import util
 import pwd
 
+from cloudinit import subp, util
+from cloudinit.distros import ug_util
+
 # https://launchpad.net/ssh-import-id
-distros = ['ubuntu', 'debian']
+distros = ["ubuntu", "debian"]
 
 
 def handle(_name, cfg, cloud, log, args):
@@ -56,11 +56,11 @@ def handle(_name, cfg, cloud, log, args):
     elist = []
     for (user, user_cfg) in users.items():
         import_ids = []
-        if user_cfg['default']:
+        if user_cfg["default"]:
             import_ids = util.get_cfg_option_list(cfg, "ssh_import_id", [])
         else:
             try:
-                import_ids = user_cfg['ssh_import_id']
+                import_ids = user_cfg["ssh_import_id"]
             except Exception:
                 log.debug("User %s is not configured for ssh_import_id", user)
                 continue
@@ -69,8 +69,9 @@ def handle(_name, cfg, cloud, log, args):
             import_ids = util.uniq_merge(import_ids)
             import_ids = [str(i) for i in import_ids]
         except Exception:
-            log.debug("User %s is not correctly configured for ssh_import_id",
-                      user)
+            log.debug(
+                "User %s is not correctly configured for ssh_import_id", user
+            )
             continue
 
         if not len(import_ids):
@@ -79,8 +80,9 @@ def handle(_name, cfg, cloud, log, args):
         try:
             import_ssh_ids(import_ids, user, log)
         except Exception as exc:
-            util.logexc(log, "ssh-import-id failed for: %s %s", user,
-                        import_ids)
+            util.logexc(
+                log, "ssh-import-id failed for: %s %s", user, import_ids
+            )
             elist.append(exc)
 
     if len(elist):
@@ -107,4 +109,5 @@ def import_ssh_ids(ids, user, log):
         util.logexc(log, "Failed to run command to import %s SSH ids", user)
         raise exc
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_timezone.py b/cloudinit/config/cc_timezone.py
index a9de8fac..24e6099e 100644
--- a/cloudinit/config/cc_timezone.py
+++ b/cloudinit/config/cc_timezone.py
@@ -27,7 +27,6 @@ the timezone from cloud config.
 """
 
 from cloudinit import util
-
 from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
@@ -46,4 +45,5 @@ def handle(name, cfg, cloud, log, args):
     # Let the distro handle settings its timezone
     cloud.distro.set_timezone(timezone)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_ubuntu_advantage.py b/cloudinit/config/cc_ubuntu_advantage.py
index 831a92a2..413fd3c1 100644
--- a/cloudinit/config/cc_ubuntu_advantage.py
+++ b/cloudinit/config/cc_ubuntu_advantage.py
@@ -4,22 +4,21 @@
 
 from textwrap import dedent
 
-from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import log as logging
+from cloudinit import subp, util
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import subp
-from cloudinit import util
-
 
-UA_URL = 'https://ubuntu.com/advantage'
+UA_URL = "https://ubuntu.com/advantage"
 
-distros = ['ubuntu']
+distros = ["ubuntu"]
 
 meta = {
-    'id': 'cc_ubuntu_advantage',
-    'name': 'Ubuntu Advantage',
-    'title': 'Configure Ubuntu Advantage support services',
-    'description': dedent("""\
+    "id": "cc_ubuntu_advantage",
+    "name": "Ubuntu Advantage",
+    "title": "Configure Ubuntu Advantage support services",
+    "description": dedent(
+        """\
         Attach machine to an existing Ubuntu Advantage support contract and
         enable or disable support services such as Livepatch, ESM,
         FIPS and FIPS Updates. When attaching a machine to Ubuntu Advantage,
@@ -31,14 +30,21 @@ meta = {
         a reboot to ensure the machine is running the FIPS-compliant kernel.
         See :ref:`Power State Change` for information on how to configure
         cloud-init to perform this reboot.
-        """),
-    'distros': distros,
-    'examples': [dedent("""\
+        """
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         # Attach the machine to an Ubuntu Advantage support contract with a
         # UA contract token obtained from %s.
         ubuntu_advantage:
           token: <ua_contract_token>
-    """ % UA_URL), dedent("""\
+    """
+            % UA_URL
+        ),
+        dedent(
+            """\
         # Attach the machine to an Ubuntu Advantage support contract enabling
         # only fips and esm services. Services will only be enabled if
         # the environment supports said service. Otherwise warnings will
@@ -48,7 +54,10 @@ meta = {
           enable:
           - fips
           - esm
-    """), dedent("""\
+    """
+        ),
+        dedent(
+            """\
         # Attach the machine to an Ubuntu Advantage support contract and enable
         # the FIPS service.  Perform a reboot once cloud-init has
         # completed.
@@ -58,30 +67,32 @@ meta = {
           token: <ua_contract_token>
           enable:
           - fips
-        """)],
-    'frequency': PER_INSTANCE,
+        """
+        ),
+    ],
+    "frequency": PER_INSTANCE,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'ubuntu_advantage': {
-            'type': 'object',
-            'properties': {
-                'enable': {
-                    'type': 'array',
-                    'items': {'type': 'string'},
+    "type": "object",
+    "properties": {
+        "ubuntu_advantage": {
+            "type": "object",
+            "properties": {
+                "enable": {
+                    "type": "array",
+                    "items": {"type": "string"},
+                },
+                "token": {
+                    "type": "string",
+                    "description": "A contract token obtained from %s."
+                    % UA_URL,
                 },
-                'token': {
-                    'type': 'string',
-                    'description': (
-                        'A contract token obtained from %s.' % UA_URL)
-                }
             },
-            'required': ['token'],
-            'additionalProperties': False
+            "required": ["token"],
+            "additionalProperties": False,
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -93,52 +104,61 @@ def configure_ua(token=None, enable=None):
     """Call ua commandline client to attach or enable services."""
     error = None
     if not token:
-        error = ('ubuntu_advantage: token must be provided')
+        error = "ubuntu_advantage: token must be provided"
         LOG.error(error)
         raise RuntimeError(error)
 
     if enable is None:
         enable = []
     elif isinstance(enable, str):
-        LOG.warning('ubuntu_advantage: enable should be a list, not'
-                    ' a string; treating as a single enable')
+        LOG.warning(
+            "ubuntu_advantage: enable should be a list, not"
+            " a string; treating as a single enable"
+        )
         enable = [enable]
     elif not isinstance(enable, list):
-        LOG.warning('ubuntu_advantage: enable should be a list, not'
-                    ' a %s; skipping enabling services',
-                    type(enable).__name__)
+        LOG.warning(
+            "ubuntu_advantage: enable should be a list, not"
+            " a %s; skipping enabling services",
+            type(enable).__name__,
+        )
         enable = []
 
-    attach_cmd = ['ua', 'attach', token]
-    LOG.debug('Attaching to Ubuntu Advantage. %s', ' '.join(attach_cmd))
+    attach_cmd = ["ua", "attach", token]
+    LOG.debug("Attaching to Ubuntu Advantage. %s", " ".join(attach_cmd))
     try:
         subp.subp(attach_cmd)
     except subp.ProcessExecutionError as e:
-        msg = 'Failure attaching Ubuntu Advantage:\n{error}'.format(
-            error=str(e))
+        msg = "Failure attaching Ubuntu Advantage:\n{error}".format(
+            error=str(e)
+        )
         util.logexc(LOG, msg)
         raise RuntimeError(msg) from e
     enable_errors = []
     for service in enable:
         try:
-            cmd = ['ua', 'enable', service]
+            cmd = ["ua", "enable", service]
             subp.subp(cmd, capture=True)
         except subp.ProcessExecutionError as e:
             enable_errors.append((service, e))
     if enable_errors:
         for service, error in enable_errors:
             msg = 'Failure enabling "{service}":\n{error}'.format(
-                service=service, error=str(error))
+                service=service, error=str(error)
+            )
             util.logexc(LOG, msg)
         raise RuntimeError(
-            'Failure enabling Ubuntu Advantage service(s): {}'.format(
-                ', '.join('"{}"'.format(service)
-                          for service, _ in enable_errors)))
+            "Failure enabling Ubuntu Advantage service(s): {}".format(
+                ", ".join(
+                    '"{}"'.format(service) for service, _ in enable_errors
+                )
+            )
+        )
 
 
 def maybe_install_ua_tools(cloud):
     """Install ubuntu-advantage-tools if not present."""
-    if subp.which('ua'):
+    if subp.which("ua"):
         return
     try:
         cloud.distro.update_package_sources()
@@ -146,7 +166,7 @@ def maybe_install_ua_tools(cloud):
         util.logexc(LOG, "Package update failed")
         raise
     try:
-        cloud.distro.install_packages(['ubuntu-advantage-tools'])
+        cloud.distro.install_packages(["ubuntu-advantage-tools"])
     except Exception:
         util.logexc(LOG, "Failed to install ubuntu-advantage-tools")
         raise
@@ -154,27 +174,35 @@ def maybe_install_ua_tools(cloud):
 
 def handle(name, cfg, cloud, log, args):
     ua_section = None
-    if 'ubuntu-advantage' in cfg:
-        LOG.warning('Deprecated configuration key "ubuntu-advantage" provided.'
-                    ' Expected underscore delimited "ubuntu_advantage"; will'
-                    ' attempt to continue.')
-        ua_section = cfg['ubuntu-advantage']
-    if 'ubuntu_advantage' in cfg:
-        ua_section = cfg['ubuntu_advantage']
+    if "ubuntu-advantage" in cfg:
+        LOG.warning(
+            'Deprecated configuration key "ubuntu-advantage" provided.'
+            ' Expected underscore delimited "ubuntu_advantage"; will'
+            " attempt to continue."
+        )
+        ua_section = cfg["ubuntu-advantage"]
+    if "ubuntu_advantage" in cfg:
+        ua_section = cfg["ubuntu_advantage"]
     if ua_section is None:
-        LOG.debug("Skipping module named %s,"
-                  " no 'ubuntu_advantage' configuration found", name)
+        LOG.debug(
+            "Skipping module named %s,"
+            " no 'ubuntu_advantage' configuration found",
+            name,
+        )
         return
     validate_cloudconfig_schema(cfg, schema)
-    if 'commands' in ua_section:
+    if "commands" in ua_section:
         msg = (
             'Deprecated configuration "ubuntu-advantage: commands" provided.'
-            ' Expected "token"')
+            ' Expected "token"'
+        )
         LOG.error(msg)
         raise RuntimeError(msg)
 
     maybe_install_ua_tools(cloud)
-    configure_ua(token=ua_section.get('token'),
-                 enable=ua_section.get('enable'))
+    configure_ua(
+        token=ua_section.get("token"), enable=ua_section.get("enable")
+    )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_ubuntu_drivers.py b/cloudinit/config/cc_ubuntu_drivers.py
index 7f617efe..6c8494c8 100644
--- a/cloudinit/config/cc_ubuntu_drivers.py
+++ b/cloudinit/config/cc_ubuntu_drivers.py
@@ -5,57 +5,62 @@
 import os
 from textwrap import dedent
 
-from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import log as logging
+from cloudinit import subp, temp_utils, type_utils, util
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import subp
-from cloudinit import temp_utils
-from cloudinit import type_utils
-from cloudinit import util
 
 LOG = logging.getLogger(__name__)
 
 frequency = PER_INSTANCE
-distros = ['ubuntu']
+distros = ["ubuntu"]
 meta = {
-    'id': 'cc_ubuntu_drivers',
-    'name': 'Ubuntu Drivers',
-    'title': 'Interact with third party drivers in Ubuntu.',
-    'description': dedent("""\
+    "id": "cc_ubuntu_drivers",
+    "name": "Ubuntu Drivers",
+    "title": "Interact with third party drivers in Ubuntu.",
+    "description": dedent(
+        """\
         This module interacts with the 'ubuntu-drivers' command to install
-        third party driver packages."""),
-    'distros': distros,
-    'examples': [dedent("""\
+        third party driver packages."""
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         drivers:
           nvidia:
             license-accepted: true
-        """)],
-    'frequency': frequency,
+        """
+        )
+    ],
+    "frequency": frequency,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'drivers': {
-            'type': 'object',
-            'additionalProperties': False,
-            'properties': {
-                'nvidia': {
-                    'type': 'object',
-                    'additionalProperties': False,
-                    'required': ['license-accepted'],
-                    'properties': {
-                        'license-accepted': {
-                            'type': 'boolean',
-                            'description': ("Do you accept the NVIDIA driver"
-                                            " license?"),
+    "type": "object",
+    "properties": {
+        "drivers": {
+            "type": "object",
+            "additionalProperties": False,
+            "properties": {
+                "nvidia": {
+                    "type": "object",
+                    "additionalProperties": False,
+                    "required": ["license-accepted"],
+                    "properties": {
+                        "license-accepted": {
+                            "type": "boolean",
+                            "description": (
+                                "Do you accept the NVIDIA driver license?"
+                            ),
                         },
-                        'version': {
-                            'type': 'string',
-                            'description': (
-                                'The version of the driver to install (e.g.'
+                        "version": {
+                            "type": "string",
+                            "description": (
+                                "The version of the driver to install (e.g."
                                 ' "390", "410"). Defaults to the latest'
-                                ' version.'),
+                                " version."
+                            ),
                         },
                     },
                 },
@@ -64,7 +69,8 @@ schema = {
     },
 }
 OLD_UBUNTU_DRIVERS_STDERR_NEEDLE = (
-    "ubuntu-drivers: error: argument <command>: invalid choice: 'install'")
+    "ubuntu-drivers: error: argument <command>: invalid choice: 'install'"
+)
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
@@ -99,10 +105,11 @@ db_x_loadtemplatefile "$1" cloud-init
 def install_drivers(cfg, pkg_install_func):
     if not isinstance(cfg, dict):
         raise TypeError(
-            "'drivers' config expected dict, found '%s': %s" %
-            (type_utils.obj_name(cfg), cfg))
+            "'drivers' config expected dict, found '%s': %s"
+            % (type_utils.obj_name(cfg), cfg)
+        )
 
-    cfgpath = 'nvidia/license-accepted'
+    cfgpath = "nvidia/license-accepted"
     # Call translate_bool to ensure that we treat string values like "yes" as
     # acceptance and _don't_ treat string values like "nah" as acceptance
     # because they're True-ish
@@ -111,46 +118,56 @@ def install_drivers(cfg, pkg_install_func):
         LOG.debug("Not installing NVIDIA drivers. %s=%s", cfgpath, nv_acc)
         return
 
-    if not subp.which('ubuntu-drivers'):
-        LOG.debug("'ubuntu-drivers' command not available.  "
-                  "Installing ubuntu-drivers-common")
-        pkg_install_func(['ubuntu-drivers-common'])
+    if not subp.which("ubuntu-drivers"):
+        LOG.debug(
+            "'ubuntu-drivers' command not available.  "
+            "Installing ubuntu-drivers-common"
+        )
+        pkg_install_func(["ubuntu-drivers-common"])
 
-    driver_arg = 'nvidia'
-    version_cfg = util.get_cfg_by_path(cfg, 'nvidia/version')
+    driver_arg = "nvidia"
+    version_cfg = util.get_cfg_by_path(cfg, "nvidia/version")
     if version_cfg:
-        driver_arg += ':{}'.format(version_cfg)
+        driver_arg += ":{}".format(version_cfg)
 
-    LOG.debug("Installing and activating NVIDIA drivers (%s=%s, version=%s)",
-              cfgpath, nv_acc, version_cfg if version_cfg else 'latest')
+    LOG.debug(
+        "Installing and activating NVIDIA drivers (%s=%s, version=%s)",
+        cfgpath,
+        nv_acc,
+        version_cfg if version_cfg else "latest",
+    )
 
     # Register and set debconf selection linux/nvidia/latelink = true
     tdir = temp_utils.mkdtemp(needs_exe=True)
-    debconf_file = os.path.join(tdir, 'nvidia.template')
-    debconf_script = os.path.join(tdir, 'nvidia-debconf.sh')
+    debconf_file = os.path.join(tdir, "nvidia.template")
+    debconf_script = os.path.join(tdir, "nvidia-debconf.sh")
     try:
         util.write_file(debconf_file, NVIDIA_DEBCONF_CONTENT)
         util.write_file(
             debconf_script,
             util.encode_text(NVIDIA_DRIVER_LATELINK_DEBCONF_SCRIPT),
-            mode=0o755)
+            mode=0o755,
+        )
         subp.subp([debconf_script, debconf_file])
     except Exception as e:
         util.logexc(
-            LOG, "Failed to register NVIDIA debconf template: %s", str(e))
+            LOG, "Failed to register NVIDIA debconf template: %s", str(e)
+        )
         raise
     finally:
         if os.path.isdir(tdir):
             util.del_dir(tdir)
 
     try:
-        subp.subp(['ubuntu-drivers', 'install', '--gpgpu', driver_arg])
+        subp.subp(["ubuntu-drivers", "install", "--gpgpu", driver_arg])
     except subp.ProcessExecutionError as exc:
         if OLD_UBUNTU_DRIVERS_STDERR_NEEDLE in exc.stderr:
-            LOG.warning('the available version of ubuntu-drivers is'
-                        ' too old to perform requested driver installation')
-        elif 'No drivers found for installation.' in exc.stdout:
-            LOG.warning('ubuntu-drivers found no drivers for installation')
+            LOG.warning(
+                "the available version of ubuntu-drivers is"
+                " too old to perform requested driver installation"
+            )
+        elif "No drivers found for installation." in exc.stdout:
+            LOG.warning("ubuntu-drivers found no drivers for installation")
         raise
 
 
@@ -160,4 +177,4 @@ def handle(name, cfg, cloud, log, _args):
         return
 
     validate_cloudconfig_schema(cfg, schema)
-    install_drivers(cfg['drivers'], cloud.distro.install_packages)
+    install_drivers(cfg["drivers"], cloud.distro.install_packages)
diff --git a/cloudinit/config/cc_update_etc_hosts.py b/cloudinit/config/cc_update_etc_hosts.py
index 32368bbb..f0aa9b0f 100644
--- a/cloudinit/config/cc_update_etc_hosts.py
+++ b/cloudinit/config/cc_update_etc_hosts.py
@@ -50,9 +50,7 @@ ping ``127.0.0.1`` or ``127.0.1.1`` or other ip).
     hostname: <fqdn/hostname>
 """
 
-from cloudinit import templater
-from cloudinit import util
-
+from cloudinit import templater, util
 from cloudinit.settings import PER_ALWAYS
 
 frequency = PER_ALWAYS
@@ -63,35 +61,45 @@ def handle(name, cfg, cloud, log, _args):
 
     hosts_fn = cloud.distro.hosts_fn
 
-    if util.translate_bool(manage_hosts, addons=['template']):
+    if util.translate_bool(manage_hosts, addons=["template"]):
         (hostname, fqdn) = util.get_hostname_fqdn(cfg, cloud)
         if not hostname:
-            log.warning(("Option 'manage_etc_hosts' was set,"
-                         " but no hostname was found"))
+            log.warning(
+                "Option 'manage_etc_hosts' was set, but no hostname was found"
+            )
             return
 
         # Render from a template file
-        tpl_fn_name = cloud.get_template_filename("hosts.%s" %
-                                                  (cloud.distro.osfamily))
+        tpl_fn_name = cloud.get_template_filename(
+            "hosts.%s" % (cloud.distro.osfamily)
+        )
         if not tpl_fn_name:
-            raise RuntimeError(("No hosts template could be"
-                                " found for distro %s") %
-                               (cloud.distro.osfamily))
+            raise RuntimeError(
+                "No hosts template could be found for distro %s"
+                % (cloud.distro.osfamily)
+            )
 
-        templater.render_to_file(tpl_fn_name, hosts_fn,
-                                 {'hostname': hostname, 'fqdn': fqdn})
+        templater.render_to_file(
+            tpl_fn_name, hosts_fn, {"hostname": hostname, "fqdn": fqdn}
+        )
 
     elif manage_hosts == "localhost":
         (hostname, fqdn) = util.get_hostname_fqdn(cfg, cloud)
         if not hostname:
-            log.warning(("Option 'manage_etc_hosts' was set,"
-                         " but no hostname was found"))
+            log.warning(
+                "Option 'manage_etc_hosts' was set, but no hostname was found"
+            )
             return
 
         log.debug("Managing localhost in %s", hosts_fn)
         cloud.distro.update_etc_hosts(hostname, fqdn)
     else:
-        log.debug(("Configuration option 'manage_etc_hosts' is not set,"
-                   " not managing %s in module %s"), hosts_fn, name)
+        log.debug(
+            "Configuration option 'manage_etc_hosts' is not set,"
+            " not managing %s in module %s",
+            hosts_fn,
+            name,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_update_hostname.py b/cloudinit/config/cc_update_hostname.py
index 370de73a..09f6f6da 100644
--- a/cloudinit/config/cc_update_hostname.py
+++ b/cloudinit/config/cc_update_hostname.py
@@ -34,33 +34,38 @@ is set, then the hostname will not be altered.
 
 import os
 
-from cloudinit.settings import PER_ALWAYS
 from cloudinit import util
+from cloudinit.settings import PER_ALWAYS
 
 frequency = PER_ALWAYS
 
 
 def handle(name, cfg, cloud, log, _args):
     if util.get_cfg_option_bool(cfg, "preserve_hostname", False):
-        log.debug(("Configuration option 'preserve_hostname' is set,"
-                   " not updating the hostname in module %s"), name)
+        log.debug(
+            "Configuration option 'preserve_hostname' is set,"
+            " not updating the hostname in module %s",
+            name,
+        )
         return
 
     # Set prefer_fqdn_over_hostname value in distro
-    hostname_fqdn = util.get_cfg_option_bool(cfg,
-                                             "prefer_fqdn_over_hostname",
-                                             None)
+    hostname_fqdn = util.get_cfg_option_bool(
+        cfg, "prefer_fqdn_over_hostname", None
+    )
     if hostname_fqdn is not None:
-        cloud.distro.set_option('prefer_fqdn_over_hostname', hostname_fqdn)
+        cloud.distro.set_option("prefer_fqdn_over_hostname", hostname_fqdn)
 
     (hostname, fqdn) = util.get_hostname_fqdn(cfg, cloud)
     try:
-        prev_fn = os.path.join(cloud.get_cpath('data'), "previous-hostname")
+        prev_fn = os.path.join(cloud.get_cpath("data"), "previous-hostname")
         log.debug("Updating hostname to %s (%s)", fqdn, hostname)
         cloud.distro.update_hostname(hostname, fqdn, prev_fn)
     except Exception:
-        util.logexc(log, "Failed to update the hostname to %s (%s)", fqdn,
-                    hostname)
+        util.logexc(
+            log, "Failed to update the hostname to %s (%s)", fqdn, hostname
+        )
         raise
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_users_groups.py b/cloudinit/config/cc_users_groups.py
index ac4a4410..ef77a799 100644
--- a/cloudinit/config/cc_users_groups.py
+++ b/cloudinit/config/cc_users_groups.py
@@ -127,12 +127,12 @@ config keys for an entry in ``users`` are as follows:
           uid: <user id>
 """
 
+from cloudinit import log as logging
+
 # Ensure this is aliased to a name not 'distros'
 # since the module attribute 'distros'
 # is a list of distros that are supported, not a sub-module
 from cloudinit.distros import ug_util
-from cloudinit import log as logging
-
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
@@ -149,26 +149,31 @@ def handle(name, cfg, cloud, _log, _args):
     for (user, config) in users.items():
         ssh_redirect_user = config.pop("ssh_redirect_user", False)
         if ssh_redirect_user:
-            if 'ssh_authorized_keys' in config or 'ssh_import_id' in config:
+            if "ssh_authorized_keys" in config or "ssh_import_id" in config:
                 raise ValueError(
-                    'Not creating user %s. ssh_redirect_user cannot be'
-                    ' provided with ssh_import_id or ssh_authorized_keys' %
-                    user)
-            if ssh_redirect_user not in (True, 'default'):
+                    "Not creating user %s. ssh_redirect_user cannot be"
+                    " provided with ssh_import_id or ssh_authorized_keys"
+                    % user
+                )
+            if ssh_redirect_user not in (True, "default"):
                 raise ValueError(
-                    'Not creating user %s. Invalid value of'
-                    ' ssh_redirect_user: %s. Expected values: true, default'
-                    ' or false.' % (user, ssh_redirect_user))
+                    "Not creating user %s. Invalid value of"
+                    " ssh_redirect_user: %s. Expected values: true, default"
+                    " or false." % (user, ssh_redirect_user)
+                )
             if default_user is None:
                 LOG.warning(
-                    'Ignoring ssh_redirect_user: %s for %s.'
-                    ' No default_user defined.'
-                    ' Perhaps missing cloud configuration users: '
-                    ' [default, ..].',
-                    ssh_redirect_user, user)
+                    "Ignoring ssh_redirect_user: %s for %s."
+                    " No default_user defined."
+                    " Perhaps missing cloud configuration users: "
+                    " [default, ..].",
+                    ssh_redirect_user,
+                    user,
+                )
             else:
-                config['ssh_redirect_user'] = default_user
-                config['cloud_public_ssh_keys'] = cloud_keys
+                config["ssh_redirect_user"] = default_user
+                config["cloud_public_ssh_keys"] = cloud_keys
         cloud.distro.create_user(user, **config)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_write_files.py b/cloudinit/config/cc_write_files.py
index 55f8c684..2c580328 100644
--- a/cloudinit/config/cc_write_files.py
+++ b/cloudinit/config/cc_write_files.py
@@ -10,22 +10,21 @@ import base64
 import os
 from textwrap import dedent
 
-from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
 from cloudinit import log as logging
-from cloudinit.settings import PER_INSTANCE
 from cloudinit import util
-
+from cloudinit.config.schema import get_meta_doc, validate_cloudconfig_schema
+from cloudinit.settings import PER_INSTANCE
 
 frequency = PER_INSTANCE
 
 DEFAULT_OWNER = "root:root"
 DEFAULT_PERMS = 0o644
 DEFAULT_DEFER = False
-UNKNOWN_ENC = 'text/plain'
+UNKNOWN_ENC = "text/plain"
 
 LOG = logging.getLogger(__name__)
 
-distros = ['all']
+distros = ["all"]
 
 # The schema definition for each cloud-config module is a strict contract for
 # describing supported configuration parameters for each cloud-config section.
@@ -34,14 +33,22 @@ distros = ['all']
 # configuration.
 
 supported_encoding_types = [
-    'gz', 'gzip', 'gz+base64', 'gzip+base64', 'gz+b64', 'gzip+b64', 'b64',
-    'base64']
+    "gz",
+    "gzip",
+    "gz+base64",
+    "gzip+base64",
+    "gz+b64",
+    "gzip+b64",
+    "b64",
+    "base64",
+]
 
 meta = {
-    'id': 'cc_write_files',
-    'name': 'Write Files',
-    'title': 'write arbitrary files',
-    'description': dedent("""\
+    "id": "cc_write_files",
+    "name": "Write Files",
+    "title": "write arbitrary files",
+    "description": dedent(
+        """\
         Write out arbitrary content to files, optionally setting permissions.
         Parent folders in the path are created if absent.
         Content can be specified in plain text or binary. Data encoded with
@@ -57,10 +64,12 @@ meta = {
         Do not write files under /tmp during boot because of a race with
         systemd-tmpfiles-clean that can cause temp files to get cleaned during
         the early boot process. Use /run/somedir instead to avoid race
-        LP:1707222."""),
-    'distros': distros,
-    'examples': [
-        dedent("""\
+        LP:1707222."""
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         # Write out base64 encoded content to /etc/sysconfig/selinux
         write_files:
         - encoding: b64
@@ -68,16 +77,20 @@ meta = {
           owner: root:root
           path: /etc/sysconfig/selinux
           permissions: '0644'
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
         # Appending content to an existing file
         write_files:
         - content: |
             15 * * * * root ship_logs
           path: /etc/crontab
           append: true
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
         # Provide gziped binary content
         write_files:
         - encoding: gzip
@@ -85,13 +98,17 @@ meta = {
               H4sIAIDb/U8C/1NW1E/KzNMvzuBKTc7IV8hIzcnJVyjPL8pJ4QIA6N+MVxsAAAA=
           path: /usr/bin/hello
           permissions: '0755'
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
         # Create an empty file on the system
         write_files:
         - path: /root/CLOUD_INIT_WAS_HERE
-        """),
-        dedent("""\
+        """
+        ),
+        dedent(
+            """\
         # Defer writing the file until after the package (Nginx) is
         # installed and its user is created alongside
         write_files:
@@ -108,85 +125,109 @@ meta = {
           owner: 'nginx:nginx'
           permissions: '0640'
           defer: true
-        """)],
-    'frequency': frequency,
+        """
+        ),
+    ],
+    "frequency": frequency,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'write_files': {
-            'type': 'array',
-            'items': {
-                'type': 'object',
-                'properties': {
-                    'path': {
-                        'type': 'string',
-                        'description': dedent("""\
+    "type": "object",
+    "properties": {
+        "write_files": {
+            "type": "array",
+            "items": {
+                "type": "object",
+                "properties": {
+                    "path": {
+                        "type": "string",
+                        "description": dedent(
+                            """\
                             Path of the file to which ``content`` is decoded
                             and written
-                        """),
+                        """
+                        ),
                     },
-                    'content': {
-                        'type': 'string',
-                        'default': '',
-                        'description': dedent("""\
+                    "content": {
+                        "type": "string",
+                        "default": "",
+                        "description": dedent(
+                            """\
                             Optional content to write to the provided ``path``.
                             When content is present and encoding is not '%s',
                             decode the content prior to writing. Default:
                             **''**
-                        """ % UNKNOWN_ENC),
+                        """
+                            % UNKNOWN_ENC
+                        ),
                     },
-                    'owner': {
-                        'type': 'string',
-                        'default': DEFAULT_OWNER,
-                        'description': dedent("""\
+                    "owner": {
+                        "type": "string",
+                        "default": DEFAULT_OWNER,
+                        "description": dedent(
+                            """\
                             Optional owner:group to chown on the file. Default:
                             **{owner}**
-                        """.format(owner=DEFAULT_OWNER)),
+                        """.format(
+                                owner=DEFAULT_OWNER
+                            )
+                        ),
                     },
-                    'permissions': {
-                        'type': 'string',
-                        'default': oct(DEFAULT_PERMS).replace('o', ''),
-                        'description': dedent("""\
+                    "permissions": {
+                        "type": "string",
+                        "default": oct(DEFAULT_PERMS).replace("o", ""),
+                        "description": dedent(
+                            """\
                             Optional file permissions to set on ``path``
                             represented as an octal string '0###'. Default:
                             **'{perms}'**
-                        """.format(perms=oct(DEFAULT_PERMS).replace('o', ''))),
+                        """.format(
+                                perms=oct(DEFAULT_PERMS).replace("o", "")
+                            )
+                        ),
                     },
-                    'encoding': {
-                        'type': 'string',
-                        'default': UNKNOWN_ENC,
-                        'enum': supported_encoding_types,
-                        'description': dedent("""\
+                    "encoding": {
+                        "type": "string",
+                        "default": UNKNOWN_ENC,
+                        "enum": supported_encoding_types,
+                        "description": dedent(
+                            """\
                             Optional encoding type of the content. Default is
                             **text/plain** and no content decoding is
                             performed. Supported encoding types are:
-                            %s.""" % ", ".join(supported_encoding_types)),
+                            %s."""
+                            % ", ".join(supported_encoding_types)
+                        ),
                     },
-                    'append': {
-                        'type': 'boolean',
-                        'default': False,
-                        'description': dedent("""\
+                    "append": {
+                        "type": "boolean",
+                        "default": False,
+                        "description": dedent(
+                            """\
                             Whether to append ``content`` to existing file if
                             ``path`` exists. Default: **false**.
-                        """),
+                        """
+                        ),
                     },
-                    'defer': {
-                        'type': 'boolean',
-                        'default': DEFAULT_DEFER,
-                        'description': dedent("""\
+                    "defer": {
+                        "type": "boolean",
+                        "default": DEFAULT_DEFER,
+                        "description": dedent(
+                            """\
                             Defer writing the file until 'final' stage, after
                             users were created, and packages were installed.
                             Default: **{defer}**.
-                        """.format(defer=DEFAULT_DEFER)),
+                        """.format(
+                                defer=DEFAULT_DEFER
+                            )
+                        ),
                     },
                 },
-                'required': ['path'],
-                'additionalProperties': False
+                "required": ["path"],
+                "additionalProperties": False,
             },
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -194,36 +235,40 @@ __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
 
 def handle(name, cfg, _cloud, log, _args):
     validate_cloudconfig_schema(cfg, schema)
-    file_list = cfg.get('write_files', [])
+    file_list = cfg.get("write_files", [])
     filtered_files = [
-        f for f in file_list if not util.get_cfg_option_bool(f,
-                                                             'defer',
-                                                             DEFAULT_DEFER)
+        f
+        for f in file_list
+        if not util.get_cfg_option_bool(f, "defer", DEFAULT_DEFER)
     ]
     if not filtered_files:
-        log.debug(("Skipping module named %s,"
-                   " no/empty 'write_files' key in configuration"), name)
+        log.debug(
+            "Skipping module named %s,"
+            " no/empty 'write_files' key in configuration",
+            name,
+        )
         return
     write_files(name, filtered_files)
 
 
 def canonicalize_extraction(encoding_type):
     if not encoding_type:
-        encoding_type = ''
+        encoding_type = ""
     encoding_type = encoding_type.lower().strip()
-    if encoding_type in ['gz', 'gzip']:
-        return ['application/x-gzip']
-    if encoding_type in ['gz+base64', 'gzip+base64', 'gz+b64', 'gzip+b64']:
-        return ['application/base64', 'application/x-gzip']
+    if encoding_type in ["gz", "gzip"]:
+        return ["application/x-gzip"]
+    if encoding_type in ["gz+base64", "gzip+base64", "gz+b64", "gzip+b64"]:
+        return ["application/base64", "application/x-gzip"]
     # Yaml already encodes binary data as base64 if it is given to the
     # yaml file as binary, so those will be automatically decoded for you.
     # But the above b64 is just for people that are more 'comfortable'
     # specifing it manually (which might be a possiblity)
-    if encoding_type in ['b64', 'base64']:
-        return ['application/base64']
+    if encoding_type in ["b64", "base64"]:
+        return ["application/base64"]
     if encoding_type:
-        LOG.warning("Unknown encoding type %s, assuming %s",
-                    encoding_type, UNKNOWN_ENC)
+        LOG.warning(
+            "Unknown encoding type %s, assuming %s", encoding_type, UNKNOWN_ENC
+        )
     return [UNKNOWN_ENC]
 
 
@@ -232,17 +277,20 @@ def write_files(name, files):
         return
 
     for (i, f_info) in enumerate(files):
-        path = f_info.get('path')
+        path = f_info.get("path")
         if not path:
-            LOG.warning("No path provided to write for entry %s in module %s",
-                        i + 1, name)
+            LOG.warning(
+                "No path provided to write for entry %s in module %s",
+                i + 1,
+                name,
+            )
             continue
         path = os.path.abspath(path)
-        extractions = canonicalize_extraction(f_info.get('encoding'))
-        contents = extract_contents(f_info.get('content', ''), extractions)
-        (u, g) = util.extract_usergroup(f_info.get('owner', DEFAULT_OWNER))
-        perms = decode_perms(f_info.get('permissions'), DEFAULT_PERMS)
-        omode = 'ab' if util.get_cfg_option_bool(f_info, 'append') else 'wb'
+        extractions = canonicalize_extraction(f_info.get("encoding"))
+        contents = extract_contents(f_info.get("content", ""), extractions)
+        (u, g) = util.extract_usergroup(f_info.get("owner", DEFAULT_OWNER))
+        perms = decode_perms(f_info.get("permissions"), DEFAULT_PERMS)
+        omode = "ab" if util.get_cfg_option_bool(f_info, "append") else "wb"
         util.write_file(path, contents, omode=omode, mode=perms)
         util.chownbyname(path, u, g)
 
@@ -264,20 +312,20 @@ def decode_perms(perm, default):
                 reps.append("%o" % r)
             except TypeError:
                 reps.append("%r" % r)
-        LOG.warning(
-            "Undecodable permissions %s, returning default %s", *reps)
+        LOG.warning("Undecodable permissions %s, returning default %s", *reps)
         return default
 
 
 def extract_contents(contents, extraction_types):
     result = contents
     for t in extraction_types:
-        if t == 'application/x-gzip':
+        if t == "application/x-gzip":
             result = util.decomp_gzip(result, quiet=False, decode=False)
-        elif t == 'application/base64':
+        elif t == "application/base64":
             result = base64.b64decode(result)
         elif t == UNKNOWN_ENC:
             pass
     return result
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_write_files_deferred.py b/cloudinit/config/cc_write_files_deferred.py
index 4fc8659c..1294628c 100644
--- a/cloudinit/config/cc_write_files_deferred.py
+++ b/cloudinit/config/cc_write_files_deferred.py
@@ -4,10 +4,11 @@
 
 """Defer writing certain files"""
 
-from cloudinit.config.schema import validate_cloudconfig_schema
 from cloudinit import util
-from cloudinit.config.cc_write_files import (
-    schema as write_files_schema, write_files, DEFAULT_DEFER)
+from cloudinit.config.cc_write_files import DEFAULT_DEFER
+from cloudinit.config.cc_write_files import schema as write_files_schema
+from cloudinit.config.cc_write_files import write_files
+from cloudinit.config.schema import validate_cloudconfig_schema
 
 # meta is not used in this module, but it remains as code documentation
 #
@@ -36,15 +37,18 @@ __doc__ = None
 
 def handle(name, cfg, _cloud, log, _args):
     validate_cloudconfig_schema(cfg, schema)
-    file_list = cfg.get('write_files', [])
+    file_list = cfg.get("write_files", [])
     filtered_files = [
-        f for f in file_list if util.get_cfg_option_bool(f,
-                                                         'defer',
-                                                         DEFAULT_DEFER)
+        f
+        for f in file_list
+        if util.get_cfg_option_bool(f, "defer", DEFAULT_DEFER)
     ]
     if not filtered_files:
-        log.debug(("Skipping module named %s,"
-                   " no deferred file defined in configuration"), name)
+        log.debug(
+            "Skipping module named %s,"
+            " no deferred file defined in configuration",
+            name,
+        )
         return
     write_files(name, filtered_files)
 
diff --git a/cloudinit/config/cc_yum_add_repo.py b/cloudinit/config/cc_yum_add_repo.py
index 046a2852..7a232689 100644
--- a/cloudinit/config/cc_yum_add_repo.py
+++ b/cloudinit/config/cc_yum_add_repo.py
@@ -37,8 +37,18 @@ from configparser import ConfigParser
 
 from cloudinit import util
 
-distros = ['almalinux', 'centos', 'cloudlinux', 'eurolinux', 'fedora',
-           'openEuler', 'photon', 'rhel', 'rocky', 'virtuozzo']
+distros = [
+    "almalinux",
+    "centos",
+    "cloudlinux",
+    "eurolinux",
+    "fedora",
+    "openEuler",
+    "photon",
+    "rhel",
+    "rocky",
+    "virtuozzo",
+]
 
 
 def _canonicalize_id(repo_id):
@@ -79,25 +89,34 @@ def _format_repository_config(repo_id, repo_config):
 
 
 def handle(name, cfg, _cloud, log, _args):
-    repos = cfg.get('yum_repos')
+    repos = cfg.get("yum_repos")
     if not repos:
-        log.debug(("Skipping module named %s,"
-                   " no 'yum_repos' configuration found"), name)
+        log.debug(
+            "Skipping module named %s, no 'yum_repos' configuration found",
+            name,
+        )
         return
-    repo_base_path = util.get_cfg_option_str(cfg, 'yum_repo_dir',
-                                             '/etc/yum.repos.d/')
+    repo_base_path = util.get_cfg_option_str(
+        cfg, "yum_repo_dir", "/etc/yum.repos.d/"
+    )
     repo_locations = {}
     repo_configs = {}
     for (repo_id, repo_config) in repos.items():
         canon_repo_id = _canonicalize_id(repo_id)
         repo_fn_pth = os.path.join(repo_base_path, "%s.repo" % (canon_repo_id))
         if os.path.exists(repo_fn_pth):
-            log.info("Skipping repo %s, file %s already exists!",
-                     repo_id, repo_fn_pth)
+            log.info(
+                "Skipping repo %s, file %s already exists!",
+                repo_id,
+                repo_fn_pth,
+            )
             continue
         elif canon_repo_id in repo_locations:
-            log.info("Skipping repo %s, file %s already pending!",
-                     repo_id, repo_fn_pth)
+            log.info(
+                "Skipping repo %s, file %s already pending!",
+                repo_id,
+                repo_fn_pth,
+            )
             continue
         if not repo_config:
             repo_config = {}
@@ -109,21 +128,29 @@ def handle(name, cfg, _cloud, log, _args):
                 n_repo_config[k] = v
         repo_config = n_repo_config
         missing_required = 0
-        for req_field in ['baseurl']:
+        for req_field in ["baseurl"]:
             if req_field not in repo_config:
-                log.warning(("Repository %s does not contain a %s"
-                             " configuration 'required' entry"),
-                            repo_id, req_field)
+                log.warning(
+                    "Repository %s does not contain a %s"
+                    " configuration 'required' entry",
+                    repo_id,
+                    req_field,
+                )
                 missing_required += 1
         if not missing_required:
             repo_configs[canon_repo_id] = repo_config
             repo_locations[canon_repo_id] = repo_fn_pth
         else:
-            log.warning("Repository %s is missing %s required fields, "
-                        "skipping!", repo_id, missing_required)
+            log.warning(
+                "Repository %s is missing %s required fields, skipping!",
+                repo_id,
+                missing_required,
+            )
     for (c_repo_id, path) in repo_locations.items():
-        repo_blob = _format_repository_config(c_repo_id,
-                                              repo_configs.get(c_repo_id))
+        repo_blob = _format_repository_config(
+            c_repo_id, repo_configs.get(c_repo_id)
+        )
         util.write_file(path, repo_blob)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/cc_zypper_add_repo.py b/cloudinit/config/cc_zypper_add_repo.py
index bf1638fb..41605b97 100644
--- a/cloudinit/config/cc_zypper_add_repo.py
+++ b/cloudinit/config/cc_zypper_add_repo.py
@@ -5,22 +5,24 @@
 
 """zypper_add_repo: Add zyper repositories to the system"""
 
-import configobj
 import os
 from textwrap import dedent
 
-from cloudinit.config.schema import get_meta_doc
+import configobj
+
 from cloudinit import log as logging
-from cloudinit.settings import PER_ALWAYS
 from cloudinit import util
+from cloudinit.config.schema import get_meta_doc
+from cloudinit.settings import PER_ALWAYS
 
-distros = ['opensuse', 'sles']
+distros = ["opensuse", "sles"]
 
 meta = {
-    'id': 'cc_zypper_add_repo',
-    'name': 'ZypperAddRepo',
-    'title': 'Configure zypper behavior and add zypper repositories',
-    'description': dedent("""\
+    "id": "cc_zypper_add_repo",
+    "name": "ZypperAddRepo",
+    "title": "Configure zypper behavior and add zypper repositories",
+    "description": dedent(
+        """\
         Configure zypper behavior by modifying /etc/zypp/zypp.conf. The
         configuration writer is "dumb" and will simply append the provided
         configuration options to the configuration file. Option settings
@@ -28,9 +30,12 @@ meta = {
         is parsed. The file is in INI format.
         Add repositories to the system. No validation is performed on the
         repository file entries, it is assumed the user is familiar with
-        the zypper repository file format."""),
-    'distros': distros,
-    'examples': [dedent("""\
+        the zypper repository file format."""
+    ),
+    "distros": distros,
+    "examples": [
+        dedent(
+            """\
         zypper:
           repos:
             - id: opensuse-oss
@@ -49,50 +54,56 @@ meta = {
             servicesdir: /etc/zypp/services.d
             download.use_deltarpm: true
             # any setting in /etc/zypp/zypp.conf
-    """)],
-    'frequency': PER_ALWAYS,
+    """
+        )
+    ],
+    "frequency": PER_ALWAYS,
 }
 
 schema = {
-    'type': 'object',
-    'properties': {
-        'zypper': {
-            'type': 'object',
-            'properties': {
-                'repos': {
-                    'type': 'array',
-                    'items': {
-                        'type': 'object',
-                        'properties': {
-                            'id': {
-                                'type': 'string',
-                                'description': dedent("""\
+    "type": "object",
+    "properties": {
+        "zypper": {
+            "type": "object",
+            "properties": {
+                "repos": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "properties": {
+                            "id": {
+                                "type": "string",
+                                "description": dedent(
+                                    """\
                                     The unique id of the repo, used when
                                      writing
-                                    /etc/zypp/repos.d/<id>.repo.""")
+                                    /etc/zypp/repos.d/<id>.repo."""
+                                ),
+                            },
+                            "baseurl": {
+                                "type": "string",
+                                "format": "uri",  # built-in format type
+                                "description": "The base repositoy URL",
                             },
-                            'baseurl': {
-                                'type': 'string',
-                                'format': 'uri',   # built-in format type
-                                'description': 'The base repositoy URL'
-                            }
                         },
-                        'required': ['id', 'baseurl'],
-                        'additionalProperties': True
+                        "required": ["id", "baseurl"],
+                        "additionalProperties": True,
                     },
-                    'minItems': 1
+                    "minItems": 1,
                 },
-                'config': {
-                    'type': 'object',
-                    'description': dedent("""\
+                "config": {
+                    "type": "object",
+                    "description": dedent(
+                        """\
                         Any supported zypo.conf key is written to
-                        /etc/zypp/zypp.conf'""")
-                }
+                        /etc/zypp/zypp.conf'"""
+                    ),
+                },
             },
-            'minProperties': 1,  # Either config or repo must be provided
-            'additionalProperties': False,  # only repos and config allowed
+            "minProperties": 1,  # Either config or repo must be provided
+            "additionalProperties": False,  # only repos and config allowed
         }
-    }
+    },
 }
 
 __doc__ = get_meta_doc(meta, schema)  # Supplement python help()
@@ -141,34 +152,43 @@ def _write_repos(repos, repo_base_path):
     valid_repos = {}
     for index, user_repo_config in enumerate(repos):
         # Skip on absent required keys
-        missing_keys = set(['id', 'baseurl']).difference(set(user_repo_config))
+        missing_keys = set(["id", "baseurl"]).difference(set(user_repo_config))
         if missing_keys:
             LOG.warning(
                 "Repo config at index %d is missing required config keys: %s",
-                index, ",".join(missing_keys))
+                index,
+                ",".join(missing_keys),
+            )
             continue
-        repo_id = user_repo_config.get('id')
+        repo_id = user_repo_config.get("id")
         canon_repo_id = _canonicalize_id(repo_id)
         repo_fn_pth = os.path.join(repo_base_path, "%s.repo" % (canon_repo_id))
         if os.path.exists(repo_fn_pth):
-            LOG.info("Skipping repo %s, file %s already exists!",
-                     repo_id, repo_fn_pth)
+            LOG.info(
+                "Skipping repo %s, file %s already exists!",
+                repo_id,
+                repo_fn_pth,
+            )
             continue
         elif repo_id in valid_repos:
-            LOG.info("Skipping repo %s, file %s already pending!",
-                     repo_id, repo_fn_pth)
+            LOG.info(
+                "Skipping repo %s, file %s already pending!",
+                repo_id,
+                repo_fn_pth,
+            )
             continue
 
         # Do some basic key formatting
         repo_config = dict(
             (k.lower().strip().replace("-", "_"), v)
             for k, v in user_repo_config.items()
-            if k and k != 'id')
+            if k and k != "id"
+        )
 
         # Set defaults if not present
-        for field in ['enabled', 'autorefresh']:
+        for field in ["enabled", "autorefresh"]:
             if field not in repo_config:
-                repo_config[field] = '1'
+                repo_config[field] = "1"
 
         valid_repos[repo_id] = (repo_fn_pth, repo_config)
 
@@ -181,39 +201,44 @@ def _write_zypp_config(zypper_config):
     """Write to the default zypp configuration file /etc/zypp/zypp.conf"""
     if not zypper_config:
         return
-    zypp_config = '/etc/zypp/zypp.conf'
+    zypp_config = "/etc/zypp/zypp.conf"
     zypp_conf_content = util.load_file(zypp_config)
-    new_settings = ['# Added via cloud.cfg']
+    new_settings = ["# Added via cloud.cfg"]
     for setting, value in zypper_config.items():
-        if setting == 'configdir':
-            msg = 'Changing the location of the zypper configuration is '
+        if setting == "configdir":
+            msg = "Changing the location of the zypper configuration is "
             msg += 'not supported, skipping "configdir" setting'
             LOG.warning(msg)
             continue
         if value:
-            new_settings.append('%s=%s' % (setting, value))
+            new_settings.append("%s=%s" % (setting, value))
     if len(new_settings) > 1:
-        new_config = zypp_conf_content + '\n'.join(new_settings)
+        new_config = zypp_conf_content + "\n".join(new_settings)
     else:
         new_config = zypp_conf_content
     util.write_file(zypp_config, new_config)
 
 
 def handle(name, cfg, _cloud, log, _args):
-    zypper_section = cfg.get('zypper')
+    zypper_section = cfg.get("zypper")
     if not zypper_section:
-        LOG.debug(("Skipping module named %s,"
-                   " no 'zypper' relevant configuration found"), name)
+        LOG.debug(
+            "Skipping module named %s,"
+            " no 'zypper' relevant configuration found",
+            name,
+        )
         return
-    repos = zypper_section.get('repos')
+    repos = zypper_section.get("repos")
     if not repos:
-        LOG.debug(("Skipping module named %s,"
-                   " no 'repos' configuration found"), name)
+        LOG.debug(
+            "Skipping module named %s, no 'repos' configuration found", name
+        )
         return
-    zypper_config = zypper_section.get('config', {})
-    repo_base_path = zypper_config.get('reposdir', '/etc/zypp/repos.d/')
+    zypper_config = zypper_section.get("config", {})
+    repo_base_path = zypper_config.get("reposdir", "/etc/zypp/repos.d/")
 
     _write_zypp_config(zypper_config)
     _write_repos(repos, repo_base_path)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/config/schema.py b/cloudinit/config/schema.py
index d772b4f9..8ec4ab6a 100644
--- a/cloudinit/config/schema.py
+++ b/cloudinit/config/schema.py
@@ -1,26 +1,27 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 """schema.py: Set of module functions for processing cloud-config schema."""
 
-from cloudinit.cmd.devel import read_cfg_paths
-from cloudinit import importer
-from cloudinit.importer import MetaSchema
-from cloudinit.util import find_modules, load_file, error
-
 import argparse
-from collections import defaultdict
-from copy import deepcopy
-from functools import partial
 import logging
 import os
 import re
 import sys
+from collections import defaultdict
+from copy import deepcopy
+from functools import partial
+
 import yaml
 
+from cloudinit import importer
+from cloudinit.cmd.devel import read_cfg_paths
+from cloudinit.importer import MetaSchema
+from cloudinit.util import error, find_modules, load_file
+
 error = partial(error, sys_exit=True)
 LOG = logging.getLogger(__name__)
 
-_YAML_MAP = {True: 'true', False: 'false', None: 'null'}
-CLOUD_CONFIG_HEADER = b'#cloud-config'
+_YAML_MAP = {True: "true", False: "false", None: "null"}
+CLOUD_CONFIG_HEADER = b"#cloud-config"
 SCHEMA_DOC_TMPL = """
 {name}
 {title_underbar}
@@ -40,9 +41,10 @@ SCHEMA_DOC_TMPL = """
 """
 SCHEMA_PROPERTY_TMPL = "{prefix}**{prop_name}:** ({prop_type}) {description}"
 SCHEMA_LIST_ITEM_TMPL = (
-    '{prefix}Each item in **{prop_name}** list supports the following keys:')
-SCHEMA_EXAMPLES_HEADER = '\n**Examples**::\n\n'
-SCHEMA_EXAMPLES_SPACER_TEMPLATE = '\n    # --- Example{0} ---'
+    "{prefix}Each item in **{prop_name}** list supports the following keys:"
+)
+SCHEMA_EXAMPLES_HEADER = "\n**Examples**::\n\n"
+SCHEMA_EXAMPLES_SPACER_TEMPLATE = "\n    # --- Example{0} ---"
 
 
 class SchemaValidationError(ValueError):
@@ -56,10 +58,12 @@ class SchemaValidationError(ValueError):
         """
         self.schema_errors = schema_errors
         error_messages = [
-            '{0}: {1}'.format(config_key, message)
-            for config_key, message in schema_errors]
+            "{0}: {1}".format(config_key, message)
+            for config_key, message in schema_errors
+        ]
         message = "Cloud config schema errors: {0}".format(
-            ', '.join(error_messages))
+            ", ".join(error_messages)
+        )
         super(SchemaValidationError, self).__init__(message)
 
 
@@ -72,8 +76,9 @@ def is_schema_byte_string(checker, instance):
         from jsonschema import Draft4Validator
     except ImportError:
         return False
-    return (Draft4Validator.TYPE_CHECKER.is_type(instance, "string") or
-            isinstance(instance, (bytes,)))
+    return Draft4Validator.TYPE_CHECKER.is_type(
+        instance, "string"
+    ) or isinstance(instance, (bytes,))
 
 
 def get_jsonschema_validator():
@@ -102,25 +107,28 @@ def get_jsonschema_validator():
     # http://json-schema.org/understanding-json-schema/reference/object.html#pattern-properties
     strict_metaschema["properties"]["label"] = {"type": "string"}
 
-    if hasattr(Draft4Validator, 'TYPE_CHECKER'):  # jsonschema 3.0+
+    if hasattr(Draft4Validator, "TYPE_CHECKER"):  # jsonschema 3.0+
         type_checker = Draft4Validator.TYPE_CHECKER.redefine(
-            'string', is_schema_byte_string)
+            "string", is_schema_byte_string
+        )
         cloudinitValidator = create(
             meta_schema=strict_metaschema,
             validators=Draft4Validator.VALIDATORS,
             version="draft4",
-            type_checker=type_checker)
+            type_checker=type_checker,
+        )
     else:  # jsonschema 2.6 workaround
         types = Draft4Validator.DEFAULT_TYPES
         # Allow bytes as well as string (and disable a spurious unsupported
         # assignment-operation pylint warning which appears because this
         # code path isn't written against the latest jsonschema).
-        types['string'] = (str, bytes)  # pylint: disable=E1137
+        types["string"] = (str, bytes)  # pylint: disable=E1137
         cloudinitValidator = create(
             meta_schema=strict_metaschema,
             validators=Draft4Validator.VALIDATORS,
             version="draft4",
-            default_types=types)
+            default_types=types,
+        )
     return (cloudinitValidator, FormatChecker)
 
 
@@ -147,12 +155,14 @@ def validate_cloudconfig_metaschema(validator, schema: dict, throw=True):
         if throw:
             raise SchemaValidationError(
                 schema_errors=(
-                    ('.'.join([str(p) for p in err.path]), err.message),
+                    (".".join([str(p) for p in err.path]), err.message),
                 )
             ) from err
         LOG.warning(
             "Meta-schema validation failed, attempting to validate config "
-            "anyway: %s", err)
+            "anyway: %s",
+            err,
+        )
 
 
 def validate_cloudconfig_schema(
@@ -176,7 +186,8 @@ def validate_cloudconfig_schema(
         (cloudinitValidator, FormatChecker) = get_jsonschema_validator()
         if strict_metaschema:
             validate_cloudconfig_metaschema(
-                cloudinitValidator, schema, throw=False)
+                cloudinitValidator, schema, throw=False
+            )
     except ImportError:
         LOG.debug("Ignoring schema validation. jsonschema is not present")
         return
@@ -184,7 +195,7 @@ def validate_cloudconfig_schema(
     validator = cloudinitValidator(schema, format_checker=FormatChecker())
     errors = ()
     for error in sorted(validator.iter_errors(config), key=lambda e: e.path):
-        path = '.'.join([str(p) for p in error.path])
+        path = ".".join([str(p) for p in error.path])
         errors += ((path, error.message),)
     if errors:
         if strict:
@@ -208,12 +219,13 @@ def annotated_cloudconfig_file(cloudconfig, original_content, schema_errors):
     schemapaths = {}
     if cloudconfig:
         schemapaths = _schemapath_for_cloudconfig(
-            cloudconfig, original_content)
+            cloudconfig, original_content
+        )
     errors_by_line = defaultdict(list)
     error_footer = []
     annotated_content = []
     for path, msg in schema_errors:
-        match = re.match(r'format-l(?P<line>\d+)\.c(?P<col>\d+).*', path)
+        match = re.match(r"format-l(?P<line>\d+)\.c(?P<col>\d+).*", path)
         if match:
             line, col = match.groups()
             errors_by_line[int(line)].append(msg)
@@ -221,24 +233,26 @@ def annotated_cloudconfig_file(cloudconfig, original_content, schema_errors):
             col = None
             errors_by_line[schemapaths[path]].append(msg)
         if col is not None:
-            msg = 'Line {line} column {col}: {msg}'.format(
-                line=line, col=col, msg=msg)
-    lines = original_content.decode().split('\n')
+            msg = "Line {line} column {col}: {msg}".format(
+                line=line, col=col, msg=msg
+            )
+    lines = original_content.decode().split("\n")
     error_index = 1
     for line_number, line in enumerate(lines, 1):
         errors = errors_by_line[line_number]
         if errors:
             error_label = []
             for error in errors:
-                error_label.append('E{0}'.format(error_index))
-                error_footer.append('# E{0}: {1}'.format(error_index, error))
+                error_label.append("E{0}".format(error_index))
+                error_footer.append("# E{0}: {1}".format(error_index, error))
                 error_index += 1
-            annotated_content.append(line + '\t\t# ' + ','.join(error_label))
+            annotated_content.append(line + "\t\t# " + ",".join(error_label))
         else:
             annotated_content.append(line)
     annotated_content.append(
-        '# Errors: -------------\n{0}\n\n'.format('\n'.join(error_footer)))
-    return '\n'.join(annotated_content)
+        "# Errors: -------------\n{0}\n\n".format("\n".join(error_footer))
+    )
+    return "\n".join(annotated_content)
 
 
 def validate_cloudconfig_file(config_path, schema, annotate=False):
@@ -266,15 +280,18 @@ def validate_cloudconfig_file(config_path, schema, annotate=False):
     else:
         if not os.path.exists(config_path):
             raise RuntimeError(
-                'Configfile {0} does not exist'.format(
-                    config_path
-                )
+                "Configfile {0} does not exist".format(config_path)
             )
         content = load_file(config_path, decode=False)
     if not content.startswith(CLOUD_CONFIG_HEADER):
         errors = (
-            ('format-l1.c1', 'File {0} needs to begin with "{1}"'.format(
-                config_path, CLOUD_CONFIG_HEADER.decode())),)
+            (
+                "format-l1.c1",
+                'File {0} needs to begin with "{1}"'.format(
+                    config_path, CLOUD_CONFIG_HEADER.decode()
+                ),
+            ),
+        )
         error = SchemaValidationError(errors)
         if annotate:
             print(annotated_cloudconfig_file({}, content, error.schema_errors))
@@ -284,27 +301,32 @@ def validate_cloudconfig_file(config_path, schema, annotate=False):
     except (yaml.YAMLError) as e:
         line = column = 1
         mark = None
-        if hasattr(e, 'context_mark') and getattr(e, 'context_mark'):
-            mark = getattr(e, 'context_mark')
-        elif hasattr(e, 'problem_mark') and getattr(e, 'problem_mark'):
-            mark = getattr(e, 'problem_mark')
+        if hasattr(e, "context_mark") and getattr(e, "context_mark"):
+            mark = getattr(e, "context_mark")
+        elif hasattr(e, "problem_mark") and getattr(e, "problem_mark"):
+            mark = getattr(e, "problem_mark")
         if mark:
             line = mark.line + 1
             column = mark.column + 1
-        errors = (('format-l{line}.c{col}'.format(line=line, col=column),
-                   'File {0} is not valid yaml. {1}'.format(
-                       config_path, str(e))),)
+        errors = (
+            (
+                "format-l{line}.c{col}".format(line=line, col=column),
+                "File {0} is not valid yaml. {1}".format(config_path, str(e)),
+            ),
+        )
         error = SchemaValidationError(errors)
         if annotate:
             print(annotated_cloudconfig_file({}, content, error.schema_errors))
         raise error from e
     try:
-        validate_cloudconfig_schema(
-            cloudconfig, schema, strict=True)
+        validate_cloudconfig_schema(cloudconfig, schema, strict=True)
     except SchemaValidationError as e:
         if annotate:
-            print(annotated_cloudconfig_file(
-                cloudconfig, content, e.schema_errors))
+            print(
+                annotated_cloudconfig_file(
+                    cloudconfig, content, e.schema_errors
+                )
+            )
         raise
 
 
@@ -315,26 +337,26 @@ def _schemapath_for_cloudconfig(config, original_content):
     @param original_content: The simple file content of the cloud-config file
     """
     # FIXME Doesn't handle multi-line lists or multi-line strings
-    content_lines = original_content.decode().split('\n')
+    content_lines = original_content.decode().split("\n")
     schema_line_numbers = {}
     list_index = 0
-    RE_YAML_INDENT = r'^(\s*)'
+    RE_YAML_INDENT = r"^(\s*)"
     scopes = []
     for line_number, line in enumerate(content_lines, 1):
         indent_depth = len(re.match(RE_YAML_INDENT, line).groups()[0])
         line = line.strip()
-        if not line or line.startswith('#'):
+        if not line or line.startswith("#"):
             continue
         if scopes:
             previous_depth, path_prefix = scopes[-1]
         else:
             previous_depth = -1
-            path_prefix = ''
-        if line.startswith('- '):
+            path_prefix = ""
+        if line.startswith("- "):
             # Process list items adding a list_index to the path prefix
-            previous_list_idx = '.%d' % (list_index - 1)
+            previous_list_idx = ".%d" % (list_index - 1)
             if path_prefix and path_prefix.endswith(previous_list_idx):
-                path_prefix = path_prefix[:-len(previous_list_idx)]
+                path_prefix = path_prefix[: -len(previous_list_idx)]
             key = str(list_index)
             schema_line_numbers[key] = line_number
             item_indent = len(re.match(RE_YAML_INDENT, line[1:]).groups()[0])
@@ -346,26 +368,26 @@ def _schemapath_for_cloudconfig(config, original_content):
         else:
             # Process non-list lines setting value if present
             list_index = 0
-            key, value = line.split(':', 1)
+            key, value = line.split(":", 1)
         if path_prefix:
             # Append any existing path_prefix for a fully-pathed key
-            key = path_prefix + '.' + key
+            key = path_prefix + "." + key
         while indent_depth <= previous_depth:
             if scopes:
                 previous_depth, path_prefix = scopes.pop()
                 if list_index > 0 and indent_depth == previous_depth:
-                    path_prefix = '.'.join(path_prefix.split('.')[:-1])
+                    path_prefix = ".".join(path_prefix.split(".")[:-1])
                     break
             else:
                 previous_depth = -1
-                path_prefix = ''
+                path_prefix = ""
         scopes.append((indent_depth, key))
         if value:
             value = value.strip()
-            if value.startswith('['):
-                scopes.append((indent_depth + 2, key + '.0'))
+            if value.startswith("["):
+                scopes.append((indent_depth + 2, key + ".0"))
                 for inner_list_index in range(0, len(yaml.safe_load(value))):
-                    list_key = key + '.' + str(inner_list_index)
+                    list_key = key + "." + str(inner_list_index)
                     schema_line_numbers[list_key] = line_number
         schema_line_numbers[key] = line_number
     return schema_line_numbers
@@ -381,14 +403,14 @@ def _get_property_type(property_dict: dict) -> str:
             str(_YAML_MAP.get(k, k)) for k in property_dict["enum"]
         ]
     if isinstance(property_type, list):
-        property_type = '/'.join(property_type)
-    items = property_dict.get('items', {})
-    sub_property_type = items.get('type', '')
+        property_type = "/".join(property_type)
+    items = property_dict.get("items", {})
+    sub_property_type = items.get("type", "")
     # Collect each item type
-    for sub_item in items.get('oneOf', {}):
+    for sub_item in items.get("oneOf", {}):
         if sub_property_type:
-            sub_property_type += '/'
-        sub_property_type += '(' + _get_property_type(sub_item) + ')'
+            sub_property_type += "/"
+        sub_property_type += "(" + _get_property_type(sub_item) + ")"
     if sub_property_type:
         return "{0} of {1}".format(property_type, sub_property_type)
     return property_type or "UNDEFINED"
@@ -408,17 +430,17 @@ def _parse_description(description, prefix) -> str:
     """
     list_paragraph = prefix * 3
     description = re.sub(r"(\S)\n(\S)", r"\1 \2", description)
+    description = re.sub(r"\n\n", r"\n\n{}".format(prefix), description)
     description = re.sub(
-        r"\n\n", r"\n\n{}".format(prefix), description)
-    description = re.sub(
-        r"\n( +)-", r"\n{}-".format(list_paragraph), description)
+        r"\n( +)-", r"\n{}-".format(list_paragraph), description
+    )
 
     return description
 
 
 def _get_property_doc(schema: dict, prefix="    ") -> str:
     """Return restructured text describing the supported schema properties."""
-    new_prefix = prefix + '    '
+    new_prefix = prefix + "    "
     properties = []
     property_keys = [
         schema.get("properties", {}),
@@ -473,16 +495,17 @@ def _get_examples(meta: MetaSchema) -> str:
     """Return restructured text describing the meta examples if present."""
     examples = meta.get("examples")
     if not examples:
-        return ''
+        return ""
     rst_content = SCHEMA_EXAMPLES_HEADER
     for count, example in enumerate(examples):
         # Python2.6 is missing textwrapper.indent
-        lines = example.split('\n')
-        indented_lines = ['    {0}'.format(line) for line in lines]
+        lines = example.split("\n")
+        indented_lines = ["    {0}".format(line) for line in lines]
         if rst_content != SCHEMA_EXAMPLES_HEADER:
             indented_lines.insert(
-                0, SCHEMA_EXAMPLES_SPACER_TEMPLATE.format(count + 1))
-        rst_content += '\n'.join(indented_lines)
+                0, SCHEMA_EXAMPLES_SPACER_TEMPLATE.format(count + 1)
+            )
+        rst_content += "\n".join(indented_lines)
     return rst_content
 
 
@@ -552,7 +575,8 @@ def load_doc(requested_modules: list) -> str:
     if invalid_docs:
         error(
             "Invalid --docs value {}. Must be one of: {}".format(
-                list(invalid_docs), ", ".join(all_modules),
+                list(invalid_docs),
+                ", ".join(all_modules),
             )
         )
     for mod_name in all_modules:
@@ -601,17 +625,35 @@ def get_parser(parser=None):
     """Return a parser for supported cmdline arguments."""
     if not parser:
         parser = argparse.ArgumentParser(
-            prog='cloudconfig-schema',
-            description='Validate cloud-config files or document schema')
-    parser.add_argument('-c', '--config-file',
-                        help='Path of the cloud-config yaml file to validate')
-    parser.add_argument('--system', action='store_true', default=False,
-                        help='Validate the system cloud-config userdata')
-    parser.add_argument('-d', '--docs', nargs='+',
-                        help=('Print schema module docs. Choices: all or'
-                              ' space-delimited cc_names.'))
-    parser.add_argument('--annotate', action="store_true", default=False,
-                        help='Annotate existing cloud-config file with errors')
+            prog="cloudconfig-schema",
+            description="Validate cloud-config files or document schema",
+        )
+    parser.add_argument(
+        "-c",
+        "--config-file",
+        help="Path of the cloud-config yaml file to validate",
+    )
+    parser.add_argument(
+        "--system",
+        action="store_true",
+        default=False,
+        help="Validate the system cloud-config userdata",
+    )
+    parser.add_argument(
+        "-d",
+        "--docs",
+        nargs="+",
+        help=(
+            "Print schema module docs. Choices: all or"
+            " space-delimited cc_names."
+        ),
+    )
+    parser.add_argument(
+        "--annotate",
+        action="store_true",
+        default=False,
+        help="Annotate existing cloud-config file with errors",
+    )
     return parser
 
 
@@ -619,12 +661,13 @@ def handle_schema_args(name, args):
     """Handle provided schema args and perform the appropriate actions."""
     exclusive_args = [args.config_file, args.docs, args.system]
     if len([arg for arg in exclusive_args if arg]) != 1:
-        error('Expected one of --config-file, --system or --docs arguments')
+        error("Expected one of --config-file, --system or --docs arguments")
     full_schema = get_schema()
     if args.config_file or args.system:
         try:
             validate_cloudconfig_file(
-                args.config_file, full_schema, args.annotate)
+                args.config_file, full_schema, args.annotate
+            )
         except SchemaValidationError as e:
             if not args.annotate:
                 error(str(e))
@@ -643,11 +686,11 @@ def handle_schema_args(name, args):
 def main():
     """Tool to validate schema of a cloud-config file or print schema docs."""
     parser = get_parser()
-    handle_schema_args('cloudconfig-schema', parser.parse_args())
+    handle_schema_args("cloudconfig-schema", parser.parse_args())
     return 0
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     sys.exit(main())
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/cs_utils.py b/cloudinit/cs_utils.py
index 8bac9c44..6db7e117 100644
--- a/cloudinit/cs_utils.py
+++ b/cloudinit/cs_utils.py
@@ -24,14 +24,13 @@ import platform
 
 from cloudinit import serial
 
-
 # these high timeouts are necessary as read may read a lot of data.
 READ_TIMEOUT = 60
 WRITE_TIMEOUT = 10
 
-SERIAL_PORT = '/dev/ttyS1'
-if platform.system() == 'Windows':
-    SERIAL_PORT = 'COM2'
+SERIAL_PORT = "/dev/ttyS1"
+if platform.system() == "Windows":
+    SERIAL_PORT = "COM2"
 
 
 class Cepko(object):
@@ -39,6 +38,7 @@ class Cepko(object):
     One instance of that object could be use for one or more
     queries to the serial port.
     """
+
     request_pattern = "<\n{}\n>"
 
     def get(self, key="", request_pattern=None):
@@ -64,17 +64,18 @@ class CepkoResult(object):
     as the instance is initialized and stores the result in both raw and
     marshalled format.
     """
+
     def __init__(self, request):
         self.request = request
         self.raw_result = self._execute()
         self.result = self._marshal(self.raw_result)
 
     def _execute(self):
-        connection = serial.Serial(port=SERIAL_PORT,
-                                   timeout=READ_TIMEOUT,
-                                   writeTimeout=WRITE_TIMEOUT)
-        connection.write(self.request.encode('ascii'))
-        return connection.readline().strip(b'\x04\n').decode('ascii')
+        connection = serial.Serial(
+            port=SERIAL_PORT, timeout=READ_TIMEOUT, writeTimeout=WRITE_TIMEOUT
+        )
+        connection.write(self.request.encode("ascii"))
+        return connection.readline().strip(b"\x04\n").decode("ascii")
 
     def _marshal(self, raw_result):
         try:
@@ -94,4 +95,5 @@ class CepkoResult(object):
     def __iter__(self):
         return self.result.__iter__()
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/dhclient_hook.py b/cloudinit/dhclient_hook.py
index 72b51b6a..46b2e8d9 100644
--- a/cloudinit/dhclient_hook.py
+++ b/cloudinit/dhclient_hook.py
@@ -19,7 +19,7 @@ EVENTS = (UP, DOWN)
 
 def _get_hooks_dir():
     i = stages.Init()
-    return os.path.join(i.paths.get_runpath(), 'dhclient.hooks')
+    return os.path.join(i.paths.get_runpath(), "dhclient.hooks")
 
 
 def _filter_env_vals(info):
@@ -28,15 +28,16 @@ def _filter_env_vals(info):
     new_info = {}
     for k, v in info.items():
         if k.startswith("DHCP4_") or k.startswith("new_"):
-            key = (k.replace('DHCP4_', '').replace('new_', '')).lower()
+            key = (k.replace("DHCP4_", "").replace("new_", "")).lower()
             new_info[key] = v
     return new_info
 
 
 def run_hook(interface, event, data_d=None, env=None):
     if event not in EVENTS:
-        raise ValueError("Unexpected event '%s'. Expected one of: %s" %
-                         (event, EVENTS))
+        raise ValueError(
+            "Unexpected event '%s'. Expected one of: %s" % (event, EVENTS)
+        )
     if data_d is None:
         data_d = _get_hooks_dir()
     if env is None:
@@ -58,9 +59,11 @@ def get_parser(parser=None):
     if parser is None:
         parser = argparse.ArgumentParser(prog=NAME, description=__doc__)
     parser.add_argument(
-        "event", help='event taken on the interface', choices=EVENTS)
+        "event", help="event taken on the interface", choices=EVENTS
+    )
     parser.add_argument(
-        "interface", help='the network interface being acted upon')
+        "interface", help="the network interface being acted upon"
+    )
     # cloud-init main uses 'action'
     parser.set_defaults(action=(NAME, handle_args))
     return parser
@@ -72,12 +75,14 @@ def handle_args(name, args, data_d=None):
     return run_hook(interface=args.interface, event=args.event, data_d=data_d)
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     import sys
+
     parser = get_parser()
     args = parser.parse_args(args=sys.argv[1:])
     return_value = handle_args(
-        NAME, args, data_d=os.environ.get('_CI_DHCP_HOOK_DATA_D'))
+        NAME, args, data_d=os.environ.get("_CI_DHCP_HOOK_DATA_D")
+    )
     if return_value:
         sys.exit(return_value)
 
diff --git a/cloudinit/distros/__init__.py b/cloudinit/distros/__init__.py
index 742804ea..de000b52 100755
--- a/cloudinit/distros/__init__.py
+++ b/cloudinit/distros/__init__.py
@@ -20,49 +20,49 @@ from typing import Any, Mapping  # noqa: F401
 
 from cloudinit import importer
 from cloudinit import log as logging
-from cloudinit import net
-from cloudinit.net import activators
-from cloudinit.net import eni
-from cloudinit.net import network_state
-from cloudinit.net import renderers
+from cloudinit import net, persistence, ssh_util, subp, type_utils, util
+from cloudinit.distros.parsers import hosts
+from cloudinit.features import ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES
+from cloudinit.net import activators, eni, network_state, renderers
 from cloudinit.net.network_state import parse_net_config_data
-from cloudinit import persistence
-from cloudinit import ssh_util
-from cloudinit import type_utils
-from cloudinit import subp
-from cloudinit import util
-
-from cloudinit.features import \
-    ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES
 
-from cloudinit.distros.parsers import hosts
 from .networking import LinuxNetworking
 
-
 # Used when a cloud-config module can be run on all cloud-init distibutions.
 # The value 'all' is surfaced in module documentation for distro support.
-ALL_DISTROS = 'all'
+ALL_DISTROS = "all"
 
 OSFAMILIES = {
-    'alpine': ['alpine'],
-    'arch': ['arch'],
-    'debian': ['debian', 'ubuntu'],
-    'freebsd': ['freebsd'],
-    'gentoo': ['gentoo'],
-    'redhat': ['almalinux', 'amazon', 'centos', 'cloudlinux', 'eurolinux',
-               'fedora', 'miraclelinux', 'openEuler', 'photon', 'rhel',
-               'rocky', 'virtuozzo'],
-    'suse': ['opensuse', 'sles'],
+    "alpine": ["alpine"],
+    "arch": ["arch"],
+    "debian": ["debian", "ubuntu"],
+    "freebsd": ["freebsd"],
+    "gentoo": ["gentoo"],
+    "redhat": [
+        "almalinux",
+        "amazon",
+        "centos",
+        "cloudlinux",
+        "eurolinux",
+        "fedora",
+        "miraclelinux",
+        "openEuler",
+        "photon",
+        "rhel",
+        "rocky",
+        "virtuozzo",
+    ],
+    "suse": ["opensuse", "sles"],
 }
 
 LOG = logging.getLogger(__name__)
 
 # This is a best guess regex, based on current EC2 AZs on 2017-12-11.
 # It could break when Amazon adds new regions and new AZs.
-_EC2_AZ_RE = re.compile('^[a-z][a-z]-(?:[a-z]+-)+[0-9][a-z]$')
+_EC2_AZ_RE = re.compile("^[a-z][a-z]-(?:[a-z]+-)+[0-9][a-z]$")
 
 # Default NTP Client Configurations
-PREFERRED_NTP_CLIENTS = ['chrony', 'systemd-timesyncd', 'ntp', 'ntpdate']
+PREFERRED_NTP_CLIENTS = ["chrony", "systemd-timesyncd", "ntp", "ntpdate"]
 
 # Letters/Digits/Hyphen characters, for use in domain name validation
 LDH_ASCII_CHARS = string.ascii_letters + string.digits + "-"
@@ -75,13 +75,13 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
     ci_sudoers_fn = "/etc/sudoers.d/90-cloud-init-users"
     hostname_conf_fn = "/etc/hostname"
     tz_zone_dir = "/usr/share/zoneinfo"
-    init_cmd = ['service']  # systemctl, service etc
+    init_cmd = ["service"]  # systemctl, service etc
     renderer_configs = {}  # type: Mapping[str, Mapping[str, Any]]
     _preferred_ntp_clients = None
     networking_cls = LinuxNetworking
     # This is used by self.shutdown_command(), and can be overridden in
     # subclasses
-    shutdown_options_map = {'halt': '-H', 'poweroff': '-P', 'reboot': '-r'}
+    shutdown_options_map = {"halt": "-H", "poweroff": "-P", "reboot": "-r"}
 
     _ci_pkl_version = 1
     prefer_fqdn = False
@@ -113,23 +113,27 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         """Deprecated. Remove if/when arch and gentoo support renderers."""
         raise NotImplementedError(
             "Legacy function '_write_network' was called in distro '%s'.\n"
-            "_write_network_config needs implementation.\n" % self.name)
+            "_write_network_config needs implementation.\n" % self.name
+        )
 
     def _write_network_state(self, network_state):
         priority = util.get_cfg_by_path(
-            self._cfg, ('network', 'renderers'), None)
+            self._cfg, ("network", "renderers"), None
+        )
 
         name, render_cls = renderers.select(priority=priority)
-        LOG.debug("Selected renderer '%s' from priority list: %s",
-                  name, priority)
+        LOG.debug(
+            "Selected renderer '%s' from priority list: %s", name, priority
+        )
         renderer = render_cls(config=self.renderer_configs.get(name))
         renderer.render_network_state(network_state)
 
     def _find_tz_file(self, tz):
         tz_file = os.path.join(self.tz_zone_dir, str(tz))
         if not os.path.isfile(tz_file):
-            raise IOError(("Invalid timezone %s,"
-                           " no file found at %s") % (tz, tz_file))
+            raise IOError(
+                "Invalid timezone %s, no file found at %s" % (tz, tz_file)
+            )
         return tz_file
 
     def get_option(self, opt_name, default=None):
@@ -171,8 +175,9 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         # This resolves the package_mirrors config option
         # down to a single dict of {mirror_name: mirror_url}
         arch_info = self._get_arch_package_mirror_info(arch)
-        return _get_package_mirror_info(data_source=data_source,
-                                        mirror_info=arch_info)
+        return _get_package_mirror_info(
+            data_source=data_source, mirror_info=arch_info
+        )
 
     def apply_network(self, settings, bring_up=True):
         """Deprecated. Remove if/when arch and gentoo support renderers."""
@@ -192,16 +197,21 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
     def _apply_network_from_network_config(self, netconfig, bring_up=True):
         """Deprecated. Remove if/when arch and gentoo support renderers."""
         distro = self.__class__
-        LOG.warning("apply_network_config is not currently implemented "
-                    "for distribution '%s'.  Attempting to use apply_network",
-                    distro)
-        header = '\n'.join([
-            "# Converted from network_config for distro %s" % distro,
-            "# Implementation of _write_network_config is needed."
-        ])
+        LOG.warning(
+            "apply_network_config is not currently implemented "
+            "for distribution '%s'.  Attempting to use apply_network",
+            distro,
+        )
+        header = "\n".join(
+            [
+                "# Converted from network_config for distro %s" % distro,
+                "# Implementation of _write_network_config is needed.",
+            ]
+        )
         ns = network_state.parse_net_config_data(netconfig)
         contents = eni.network_state_to_eni(
-            ns, header=header, render_hwaddress=True)
+            ns, header=header, render_hwaddress=True
+        )
         return self.apply_network(contents, bring_up=bring_up)
 
     def generate_fallback_config(self):
@@ -224,16 +234,19 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         except NotImplementedError:
             # backwards compat until all distros have apply_network_config
             return self._apply_network_from_network_config(
-                netconfig, bring_up=bring_up)
+                netconfig, bring_up=bring_up
+            )
 
         # Now try to bring them up
         if bring_up:
-            LOG.debug('Bringing up newly configured network interfaces')
+            LOG.debug("Bringing up newly configured network interfaces")
             try:
                 network_activator = activators.select_activator()
             except activators.NoActivatorException:
-                LOG.warning("No network activator found, not bringing up "
-                            "network interfaces")
+                LOG.warning(
+                    "No network activator found, not bringing up "
+                    "network interfaces"
+                )
                 return True
             network_activator.bring_up_all_interfaces(network_state)
         else:
@@ -274,19 +287,27 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         # temporarily (until reboot so it should
         # not be depended on). Use the write
         # hostname functions for 'permanent' adjustments.
-        LOG.debug("Non-persistently setting the system hostname to %s",
-                  hostname)
+        LOG.debug(
+            "Non-persistently setting the system hostname to %s", hostname
+        )
         try:
-            subp.subp(['hostname', hostname])
+            subp.subp(["hostname", hostname])
         except subp.ProcessExecutionError:
-            util.logexc(LOG, "Failed to non-persistently adjust the system "
-                        "hostname to %s", hostname)
+            util.logexc(
+                LOG,
+                "Failed to non-persistently adjust the system hostname to %s",
+                hostname,
+            )
 
     def _select_hostname(self, hostname, fqdn):
         # Prefer the short hostname over the long
         # fully qualified domain name
-        if util.get_cfg_option_bool(self._cfg, "prefer_fqdn_over_hostname",
-                                    self.prefer_fqdn) and fqdn:
+        if (
+            util.get_cfg_option_bool(
+                self._cfg, "prefer_fqdn_over_hostname", self.prefer_fqdn
+            )
+            and fqdn
+        ):
             return fqdn
         if not hostname:
             return fqdn
@@ -329,32 +350,39 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
         # If the system hostname is different than the previous
         # one or the desired one lets update it as well
-        if ((not sys_hostname) or (sys_hostname == prev_hostname and
-           sys_hostname != hostname)):
+        if (not sys_hostname) or (
+            sys_hostname == prev_hostname and sys_hostname != hostname
+        ):
             update_files.append(sys_fn)
 
         # If something else has changed the hostname after we set it
         # initially, we should not overwrite those changes (we should
         # only be setting the hostname once per instance)
-        if (sys_hostname and prev_hostname and
-                sys_hostname != prev_hostname):
-            LOG.info("%s differs from %s, assuming user maintained hostname.",
-                     prev_hostname_fn, sys_fn)
+        if sys_hostname and prev_hostname and sys_hostname != prev_hostname:
+            LOG.info(
+                "%s differs from %s, assuming user maintained hostname.",
+                prev_hostname_fn,
+                sys_fn,
+            )
             return
 
         # Remove duplicates (incase the previous config filename)
         # is the same as the system config filename, don't bother
         # doing it twice
         update_files = set([f for f in update_files if f])
-        LOG.debug("Attempting to update hostname to %s in %s files",
-                  hostname, len(update_files))
+        LOG.debug(
+            "Attempting to update hostname to %s in %s files",
+            hostname,
+            len(update_files),
+        )
 
         for fn in update_files:
             try:
                 self._write_hostname(hostname, fn)
             except IOError:
-                util.logexc(LOG, "Failed to write hostname %s to %s", hostname,
-                            fn)
+                util.logexc(
+                    LOG, "Failed to write hostname %s to %s", hostname, fn
+                )
 
         # If the system hostname file name was provided set the
         # non-fqdn as the transient hostname.
@@ -362,11 +390,11 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
             self._apply_hostname(applying_hostname)
 
     def update_etc_hosts(self, hostname, fqdn):
-        header = ''
+        header = ""
         if os.path.exists(self.hosts_fn):
             eh = hosts.HostsConf(util.load_file(self.hosts_fn))
         else:
-            eh = hosts.HostsConf('')
+            eh = hosts.HostsConf("")
             header = util.make_header(base="added")
         local_ip = self._get_localhost_ip()
         prev_info = eh.get_entry(local_ip)
@@ -427,7 +455,7 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         return False
 
     def get_default_user(self):
-        return self.get_option('default_user')
+        return self.get_option("default_user")
 
     def add_user(self, name, **kwargs):
         """
@@ -443,43 +471,43 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
             LOG.info("User %s already exists, skipping.", name)
             return
 
-        if 'create_groups' in kwargs:
-            create_groups = kwargs.pop('create_groups')
+        if "create_groups" in kwargs:
+            create_groups = kwargs.pop("create_groups")
         else:
             create_groups = True
 
-        useradd_cmd = ['useradd', name]
-        log_useradd_cmd = ['useradd', name]
+        useradd_cmd = ["useradd", name]
+        log_useradd_cmd = ["useradd", name]
         if util.system_is_snappy():
-            useradd_cmd.append('--extrausers')
-            log_useradd_cmd.append('--extrausers')
+            useradd_cmd.append("--extrausers")
+            log_useradd_cmd.append("--extrausers")
 
         # Since we are creating users, we want to carefully validate the
         # inputs. If something goes wrong, we can end up with a system
         # that nobody can login to.
         useradd_opts = {
-            "gecos": '--comment',
-            "homedir": '--home',
-            "primary_group": '--gid',
-            "uid": '--uid',
-            "groups": '--groups',
-            "passwd": '--password',
-            "shell": '--shell',
-            "expiredate": '--expiredate',
-            "inactive": '--inactive',
-            "selinux_user": '--selinux-user',
+            "gecos": "--comment",
+            "homedir": "--home",
+            "primary_group": "--gid",
+            "uid": "--uid",
+            "groups": "--groups",
+            "passwd": "--password",
+            "shell": "--shell",
+            "expiredate": "--expiredate",
+            "inactive": "--inactive",
+            "selinux_user": "--selinux-user",
         }
 
         useradd_flags = {
-            "no_user_group": '--no-user-group',
-            "system": '--system',
-            "no_log_init": '--no-log-init',
+            "no_user_group": "--no-user-group",
+            "system": "--system",
+            "no_log_init": "--no-log-init",
         }
 
-        redact_opts = ['passwd']
+        redact_opts = ["passwd"]
 
         # support kwargs having groups=[list] or groups="g1,g2"
-        groups = kwargs.get('groups')
+        groups = kwargs.get("groups")
         if groups:
             if isinstance(groups, str):
                 groups = groups.split(",")
@@ -490,9 +518,9 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
             # kwargs.items loop below wants a comma delimeted string
             # that can go right through to the command.
-            kwargs['groups'] = ",".join(groups)
+            kwargs["groups"] = ",".join(groups)
 
-            primary_group = kwargs.get('primary_group')
+            primary_group = kwargs.get("primary_group")
             if primary_group:
                 groups.append(primary_group)
 
@@ -510,7 +538,7 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
                 # Redact certain fields from the logs
                 if key in redact_opts:
-                    log_useradd_cmd.extend([useradd_opts[key], 'REDACTED'])
+                    log_useradd_cmd.extend([useradd_opts[key], "REDACTED"])
                 else:
                     log_useradd_cmd.extend([useradd_opts[key], val])
 
@@ -520,12 +548,12 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
         # Don't create the home directory if directed so or if the user is a
         # system user
-        if kwargs.get('no_create_home') or kwargs.get('system'):
-            useradd_cmd.append('-M')
-            log_useradd_cmd.append('-M')
+        if kwargs.get("no_create_home") or kwargs.get("system"):
+            useradd_cmd.append("-M")
+            log_useradd_cmd.append("-M")
         else:
-            useradd_cmd.append('-m')
-            log_useradd_cmd.append('-m')
+            useradd_cmd.append("-m")
+            log_useradd_cmd.append("-m")
 
         # Run the command
         LOG.debug("Adding user %s", name)
@@ -540,8 +568,8 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         Add a snappy user to the system using snappy tools
         """
 
-        snapuser = kwargs.get('snapuser')
-        known = kwargs.get('known', False)
+        snapuser = kwargs.get("snapuser")
+        known = kwargs.get("known", False)
         create_user_cmd = ["snap", "create-user", "--sudoer", "--json"]
         if known:
             create_user_cmd.append("--known")
@@ -550,11 +578,12 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         # Run the command
         LOG.debug("Adding snap user %s", name)
         try:
-            (out, err) = subp.subp(create_user_cmd, logstring=create_user_cmd,
-                                   capture=True)
+            (out, err) = subp.subp(
+                create_user_cmd, logstring=create_user_cmd, capture=True
+            )
             LOG.debug("snap create-user returned: %s:%s", out, err)
             jobj = util.load_json(out)
-            username = jobj.get('username', None)
+            username = jobj.get("username", None)
         except Exception as e:
             util.logexc(LOG, "Failed to create snap user %s", name)
             raise e
@@ -582,60 +611,66 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         """
 
         # Add a snap user, if requested
-        if 'snapuser' in kwargs:
+        if "snapuser" in kwargs:
             return self.add_snap_user(name, **kwargs)
 
         # Add the user
         self.add_user(name, **kwargs)
 
         # Set password if plain-text password provided and non-empty
-        if 'plain_text_passwd' in kwargs and kwargs['plain_text_passwd']:
-            self.set_passwd(name, kwargs['plain_text_passwd'])
+        if "plain_text_passwd" in kwargs and kwargs["plain_text_passwd"]:
+            self.set_passwd(name, kwargs["plain_text_passwd"])
 
         # Set password if hashed password is provided and non-empty
-        if 'hashed_passwd' in kwargs and kwargs['hashed_passwd']:
-            self.set_passwd(name, kwargs['hashed_passwd'], hashed=True)
+        if "hashed_passwd" in kwargs and kwargs["hashed_passwd"]:
+            self.set_passwd(name, kwargs["hashed_passwd"], hashed=True)
 
         # Default locking down the account.  'lock_passwd' defaults to True.
         # lock account unless lock_password is False.
-        if kwargs.get('lock_passwd', True):
+        if kwargs.get("lock_passwd", True):
             self.lock_passwd(name)
 
         # Configure sudo access
-        if 'sudo' in kwargs and kwargs['sudo'] is not False:
-            self.write_sudo_rules(name, kwargs['sudo'])
+        if "sudo" in kwargs and kwargs["sudo"] is not False:
+            self.write_sudo_rules(name, kwargs["sudo"])
 
         # Import SSH keys
-        if 'ssh_authorized_keys' in kwargs:
+        if "ssh_authorized_keys" in kwargs:
             # Try to handle this in a smart manner.
-            keys = kwargs['ssh_authorized_keys']
+            keys = kwargs["ssh_authorized_keys"]
             if isinstance(keys, str):
                 keys = [keys]
             elif isinstance(keys, dict):
                 keys = list(keys.values())
             if keys is not None:
                 if not isinstance(keys, (tuple, list, set)):
-                    LOG.warning("Invalid type '%s' detected for"
-                                " 'ssh_authorized_keys', expected list,"
-                                " string, dict, or set.", type(keys))
+                    LOG.warning(
+                        "Invalid type '%s' detected for"
+                        " 'ssh_authorized_keys', expected list,"
+                        " string, dict, or set.",
+                        type(keys),
+                    )
                     keys = []
                 else:
                     keys = set(keys) or []
             ssh_util.setup_user_keys(set(keys), name)
-        if 'ssh_redirect_user' in kwargs:
-            cloud_keys = kwargs.get('cloud_public_ssh_keys', [])
+        if "ssh_redirect_user" in kwargs:
+            cloud_keys = kwargs.get("cloud_public_ssh_keys", [])
             if not cloud_keys:
                 LOG.warning(
-                    'Unable to disable SSH logins for %s given'
-                    ' ssh_redirect_user: %s. No cloud public-keys present.',
-                    name, kwargs['ssh_redirect_user'])
+                    "Unable to disable SSH logins for %s given"
+                    " ssh_redirect_user: %s. No cloud public-keys present.",
+                    name,
+                    kwargs["ssh_redirect_user"],
+                )
             else:
-                redirect_user = kwargs['ssh_redirect_user']
+                redirect_user = kwargs["ssh_redirect_user"]
                 disable_option = ssh_util.DISABLE_USER_OPTS
-                disable_option = disable_option.replace('$USER', redirect_user)
-                disable_option = disable_option.replace('$DISABLE_USER', name)
+                disable_option = disable_option.replace("$USER", redirect_user)
+                disable_option = disable_option.replace("$DISABLE_USER", name)
                 ssh_util.setup_user_keys(
-                    set(cloud_keys), name, options=disable_option)
+                    set(cloud_keys), name, options=disable_option
+                )
         return True
 
     def lock_passwd(self, name):
@@ -643,36 +678,36 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         Lock the password of a user, i.e., disable password logins
         """
         # passwd must use short '-l' due to SLES11 lacking long form '--lock'
-        lock_tools = (['passwd', '-l', name], ['usermod', '--lock', name])
+        lock_tools = (["passwd", "-l", name], ["usermod", "--lock", name])
         try:
             cmd = next(tool for tool in lock_tools if subp.which(tool[0]))
         except StopIteration as e:
-            raise RuntimeError((
+            raise RuntimeError(
                 "Unable to lock user account '%s'. No tools available. "
-                "  Tried: %s.") % (name, [c[0] for c in lock_tools])
+                "  Tried: %s." % (name, [c[0] for c in lock_tools])
             ) from e
         try:
             subp.subp(cmd)
         except Exception as e:
-            util.logexc(LOG, 'Failed to disable password for user %s', name)
+            util.logexc(LOG, "Failed to disable password for user %s", name)
             raise e
 
     def expire_passwd(self, user):
         try:
-            subp.subp(['passwd', '--expire', user])
+            subp.subp(["passwd", "--expire", user])
         except Exception as e:
             util.logexc(LOG, "Failed to set 'expire' for %s", user)
             raise e
 
     def set_passwd(self, user, passwd, hashed=False):
-        pass_string = '%s:%s' % (user, passwd)
-        cmd = ['chpasswd']
+        pass_string = "%s:%s" % (user, passwd)
+        cmd = ["chpasswd"]
 
         if hashed:
             # Need to use the short option name '-e' instead of '--encrypted'
             # (which would be more descriptive) since SLES 11 doesn't know
             # about long names.
-            cmd.append('-e')
+            cmd.append("-e")
 
         try:
             subp.subp(cmd, pass_string, logstring="chpasswd for %s" % user)
@@ -682,10 +717,10 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
         return True
 
-    def ensure_sudo_dir(self, path, sudo_base='/etc/sudoers'):
+    def ensure_sudo_dir(self, path, sudo_base="/etc/sudoers"):
         # Ensure the dir is included and that
         # it actually exists as a directory
-        sudoers_contents = ''
+        sudoers_contents = ""
         base_exists = False
         if os.path.exists(sudo_base):
             sudoers_contents = util.load_file(sudo_base)
@@ -706,15 +741,23 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         if not found_include:
             try:
                 if not base_exists:
-                    lines = [('# See sudoers(5) for more information'
-                              ' on "#include" directives:'), '',
-                             util.make_header(base="added"),
-                             "#includedir %s" % (path), '']
+                    lines = [
+                        "# See sudoers(5) for more information"
+                        ' on "#include" directives:',
+                        "",
+                        util.make_header(base="added"),
+                        "#includedir %s" % (path),
+                        "",
+                    ]
                     sudoers_contents = "\n".join(lines)
                     util.write_file(sudo_base, sudoers_contents, 0o440)
                 else:
-                    lines = ['', util.make_header(base="added"),
-                             "#includedir %s" % (path), '']
+                    lines = [
+                        "",
+                        util.make_header(base="added"),
+                        "#includedir %s" % (path),
+                        "",
+                    ]
                     sudoers_contents = "\n".join(lines)
                     util.append_file(sudo_base, sudoers_contents)
                 LOG.debug("Added '#includedir %s' to %s", path, sudo_base)
@@ -728,7 +771,7 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
             sudo_file = self.ci_sudoers_fn
 
         lines = [
-            '',
+            "",
             "# User rules for %s" % user,
         ]
         if isinstance(rules, (list, tuple)):
@@ -761,9 +804,9 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
                 raise e
 
     def create_group(self, name, members=None):
-        group_add_cmd = ['groupadd', name]
+        group_add_cmd = ["groupadd", name]
         if util.system_is_snappy():
-            group_add_cmd.append('--extrausers')
+            group_add_cmd.append("--extrausers")
         if not members:
             members = []
 
@@ -781,11 +824,15 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         if len(members) > 0:
             for member in members:
                 if not util.is_user(member):
-                    LOG.warning("Unable to add group member '%s' to group '%s'"
-                                "; user does not exist.", member, name)
+                    LOG.warning(
+                        "Unable to add group member '%s' to group '%s'"
+                        "; user does not exist.",
+                        member,
+                        name,
+                    )
                     continue
 
-                subp.subp(['usermod', '-a', '-G', name, member])
+                subp.subp(["usermod", "-a", "-G", name, member])
                 LOG.info("Added user '%s' to group '%s'", member, name)
 
     def shutdown_command(self, *, mode, delay, message):
@@ -812,23 +859,25 @@ class Distro(persistence.CloudInitPickleMixin, metaclass=abc.ABCMeta):
         May raise ProcessExecutionError
         """
         init_cmd = self.init_cmd
-        if self.uses_systemd() or 'systemctl' in init_cmd:
-            init_cmd = ['systemctl']
-            cmds = {'stop': ['stop', service],
-                    'start': ['start', service],
-                    'enable': ['enable', service],
-                    'restart': ['restart', service],
-                    'reload': ['reload-or-restart', service],
-                    'try-reload': ['reload-or-try-restart', service],
-                    }
+        if self.uses_systemd() or "systemctl" in init_cmd:
+            init_cmd = ["systemctl"]
+            cmds = {
+                "stop": ["stop", service],
+                "start": ["start", service],
+                "enable": ["enable", service],
+                "restart": ["restart", service],
+                "reload": ["reload-or-restart", service],
+                "try-reload": ["reload-or-try-restart", service],
+            }
         else:
-            cmds = {'stop': [service, 'stop'],
-                    'start': [service, 'start'],
-                    'enable': [service, 'start'],
-                    'restart': [service, 'restart'],
-                    'reload': [service, 'restart'],
-                    'try-reload': [service, 'restart'],
-                    }
+            cmds = {
+                "stop": [service, "stop"],
+                "start": [service, "start"],
+                "enable": [service, "start"],
+                "restart": [service, "restart"],
+                "reload": [service, "restart"],
+                "try-reload": [service, "restart"],
+            }
         cmd = list(init_cmd) + list(cmds[action])
         return subp.subp(cmd, capture=True)
 
@@ -919,27 +968,25 @@ def _sanitize_mirror_url(url: str):
         # This is an IP address, not a hostname, so no need to apply the
         # transformations
         lambda hostname: None if net.is_ip_address(hostname) else hostname,
-
         # Encode with IDNA to get the correct characters (as `bytes`), then
         # decode with ASCII so we return a `str`
-        lambda hostname: hostname.encode('idna').decode('ascii'),
-
+        lambda hostname: hostname.encode("idna").decode("ascii"),
         # Replace any unacceptable characters with "-"
-        lambda hostname: ''.join(
+        lambda hostname: "".join(
             c if c in acceptable_chars else "-" for c in hostname
         ),
-
         # Drop leading/trailing hyphens from each part of the hostname
-        lambda hostname: '.'.join(
-            part.strip('-') for part in hostname.split('.')
+        lambda hostname: ".".join(
+            part.strip("-") for part in hostname.split(".")
         ),
     ]
 
     return _apply_hostname_transformations_to_url(url, transformations)
 
 
-def _get_package_mirror_info(mirror_info, data_source=None,
-                             mirror_filter=util.search_for_mirror):
+def _get_package_mirror_info(
+    mirror_info, data_source=None, mirror_filter=util.search_for_mirror
+):
     # given a arch specific 'mirror_info' entry (from package_mirrors)
     # search through the 'search' entries, and fallback appropriately
     # return a dict with only {name: mirror} entries.
@@ -948,7 +995,7 @@ def _get_package_mirror_info(mirror_info, data_source=None,
 
     subst = {}
     if data_source and data_source.availability_zone:
-        subst['availability_zone'] = data_source.availability_zone
+        subst["availability_zone"] = data_source.availability_zone
 
         # ec2 availability zones are named cc-direction-[0-9][a-d] (us-east-1b)
         # the region is us-east-1. so region = az[0:-1]
@@ -956,18 +1003,18 @@ def _get_package_mirror_info(mirror_info, data_source=None,
             ec2_region = data_source.availability_zone[0:-1]
 
             if ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES:
-                subst['ec2_region'] = "%s" % ec2_region
+                subst["ec2_region"] = "%s" % ec2_region
             elif data_source.platform_type == "ec2":
-                subst['ec2_region'] = "%s" % ec2_region
+                subst["ec2_region"] = "%s" % ec2_region
 
     if data_source and data_source.region:
-        subst['region'] = data_source.region
+        subst["region"] = data_source.region
 
     results = {}
-    for (name, mirror) in mirror_info.get('failsafe', {}).items():
+    for (name, mirror) in mirror_info.get("failsafe", {}).items():
         results[name] = mirror
 
-    for (name, searchlist) in mirror_info.get('search', {}).items():
+    for (name, searchlist) in mirror_info.get("search", {}).items():
         mirrors = []
         for tmpl in searchlist:
             try:
@@ -1001,17 +1048,20 @@ def _get_arch_package_mirror_info(package_mirrors, arch):
 
 
 def fetch(name):
-    locs, looked_locs = importer.find_module(name, ['', __name__], ['Distro'])
+    locs, looked_locs = importer.find_module(name, ["", __name__], ["Distro"])
     if not locs:
-        raise ImportError("No distribution found for distro %s (searched %s)"
-                          % (name, looked_locs))
+        raise ImportError(
+            "No distribution found for distro %s (searched %s)"
+            % (name, looked_locs)
+        )
     mod = importer.import_module(locs[0])
-    cls = getattr(mod, 'Distro')
+    cls = getattr(mod, "Distro")
     return cls
 
 
-def set_etc_timezone(tz, tz_file=None, tz_conf="/etc/timezone",
-                     tz_local="/etc/localtime"):
+def set_etc_timezone(
+    tz, tz_file=None, tz_conf="/etc/timezone", tz_local="/etc/localtime"
+):
     util.write_file(tz_conf, str(tz).rstrip() + "\n")
     # This ensures that the correct tz will be used for the system
     if tz_local and tz_file:
@@ -1028,7 +1078,7 @@ def set_etc_timezone(tz, tz_file=None, tz_conf="/etc/timezone",
 
 def uses_systemd():
     try:
-        res = os.lstat('/run/systemd/system')
+        res = os.lstat("/run/systemd/system")
         return stat.S_ISDIR(res.st_mode)
     except Exception:
         return False
diff --git a/cloudinit/distros/almalinux.py b/cloudinit/distros/almalinux.py
index edb3165d..3dc0a342 100644
--- a/cloudinit/distros/almalinux.py
+++ b/cloudinit/distros/almalinux.py
@@ -6,4 +6,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/alpine.py b/cloudinit/distros/alpine.py
index e82965fd..3d7d4891 100644
--- a/cloudinit/distros/alpine.py
+++ b/cloudinit/distros/alpine.py
@@ -6,13 +6,8 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import distros, helpers, subp, util
 from cloudinit.distros.parsers.hostname import HostnameConf
-
 from cloudinit.settings import PER_INSTANCE
 
 NETWORK_FILE_HEADER = """\
@@ -26,12 +21,11 @@ NETWORK_FILE_HEADER = """\
 
 
 class Distro(distros.Distro):
-    init_cmd = ['rc-service']  # init scripts
+    init_cmd = ["rc-service"]  # init scripts
     locale_conf_fn = "/etc/profile.d/locale.sh"
     network_conf_fn = "/etc/network/interfaces"
     renderer_configs = {
-        "eni": {"eni_path": network_conf_fn,
-                "eni_header": NETWORK_FILE_HEADER}
+        "eni": {"eni_path": network_conf_fn, "eni_header": NETWORK_FILE_HEADER}
     }
 
     def __init__(self, name, cfg, paths):
@@ -40,13 +34,13 @@ class Distro(distros.Distro):
         # calls from repeatly happening (when they
         # should only happen say once per instance...)
         self._runner = helpers.Runners(paths)
-        self.default_locale = 'C.UTF-8'
-        self.osfamily = 'alpine'
-        cfg['ssh_svcname'] = 'sshd'
+        self.default_locale = "C.UTF-8"
+        self.osfamily = "alpine"
+        cfg["ssh_svcname"] = "sshd"
 
     def get_locale(self):
         """The default locale for Alpine Linux is different than
-           cloud-init's DataSource default.
+        cloud-init's DataSource default.
         """
         return self.default_locale
 
@@ -71,7 +65,7 @@ class Distro(distros.Distro):
 
     def install_packages(self, pkglist):
         self.update_package_sources()
-        self.package_command('add', pkgs=pkglist)
+        self.package_command("add", pkgs=pkglist)
 
     def _write_hostname(self, hostname, filename):
         conf = None
@@ -82,7 +76,7 @@ class Distro(distros.Distro):
         except IOError:
             pass
         if not conf:
-            conf = HostnameConf('')
+            conf = HostnameConf("")
         conf.set_hostname(hostname)
         util.write_file(filename, str(conf), 0o644)
 
@@ -116,7 +110,7 @@ class Distro(distros.Distro):
         if pkgs is None:
             pkgs = []
 
-        cmd = ['apk']
+        cmd = ["apk"]
         # Redirect output
         cmd.append("--quiet")
 
@@ -128,28 +122,32 @@ class Distro(distros.Distro):
         if command:
             cmd.append(command)
 
-        if command == 'upgrade':
+        if command == "upgrade":
             cmd.extend(["--update-cache", "--available"])
 
-        pkglist = util.expand_package_list('%s-%s', pkgs)
+        pkglist = util.expand_package_list("%s-%s", pkgs)
         cmd.extend(pkglist)
 
         # Allow the output of this to flow outwards (ie not be captured)
         subp.subp(cmd, capture=False)
 
     def update_package_sources(self):
-        self._runner.run("update-sources", self.package_command,
-                         ["update"], freq=PER_INSTANCE)
+        self._runner.run(
+            "update-sources",
+            self.package_command,
+            ["update"],
+            freq=PER_INSTANCE,
+        )
 
     @property
     def preferred_ntp_clients(self):
         """Allow distro to determine the preferred ntp client list"""
         if not self._preferred_ntp_clients:
-            self._preferred_ntp_clients = ['chrony', 'ntp']
+            self._preferred_ntp_clients = ["chrony", "ntp"]
 
         return self._preferred_ntp_clients
 
-    def shutdown_command(self, mode='poweroff', delay='now', message=None):
+    def shutdown_command(self, mode="poweroff", delay="now", message=None):
         # called from cc_power_state_change.load_power_state
         # Alpine has halt/poweroff/reboot, with the following specifics:
         # - we use them rather than the generic "shutdown"
@@ -163,7 +161,7 @@ class Distro(distros.Distro):
         # halt/poweroff/reboot commands take seconds rather than minutes.
         if delay == "now":
             # Alpine's commands do not understand "now".
-            command += ['0']
+            command += ["0"]
         else:
             try:
                 command.append(str(int(delay) * 60))
@@ -175,4 +173,5 @@ class Distro(distros.Distro):
 
         return command
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/amazon.py b/cloudinit/distros/amazon.py
index 5fcec952..a3573547 100644
--- a/cloudinit/distros/amazon.py
+++ b/cloudinit/distros/amazon.py
@@ -14,7 +14,6 @@ from cloudinit.distros import rhel
 
 
 class Distro(rhel.Distro):
-
     def update_package_sources(self):
         return None
 
diff --git a/cloudinit/distros/arch.py b/cloudinit/distros/arch.py
index 3c5bbb38..0bdfef83 100644
--- a/cloudinit/distros/arch.py
+++ b/cloudinit/distros/arch.py
@@ -4,32 +4,29 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import log as logging
-from cloudinit import util
-from cloudinit import subp
+import os
 
+from cloudinit import distros, helpers
+from cloudinit import log as logging
+from cloudinit import subp, util
 from cloudinit.distros import net_util
 from cloudinit.distros.parsers.hostname import HostnameConf
-
 from cloudinit.net.renderers import RendererNotFoundError
-
 from cloudinit.settings import PER_INSTANCE
 
-import os
-
 LOG = logging.getLogger(__name__)
 
 
 class Distro(distros.Distro):
     locale_gen_fn = "/etc/locale.gen"
     network_conf_dir = "/etc/netctl"
-    init_cmd = ['systemctl']  # init scripts
+    init_cmd = ["systemctl"]  # init scripts
     renderer_configs = {
-        "netplan": {"netplan_path": "/etc/netplan/50-cloud-init.yaml",
-                    "netplan_header": "# generated by cloud-init\n",
-                    "postcmds": True}
+        "netplan": {
+            "netplan_path": "/etc/netplan/50-cloud-init.yaml",
+            "netplan_header": "# generated by cloud-init\n",
+            "postcmds": True,
+        }
     }
 
     def __init__(self, name, cfg, paths):
@@ -38,28 +35,31 @@ class Distro(distros.Distro):
         # calls from repeatly happening (when they
         # should only happen say once per instance...)
         self._runner = helpers.Runners(paths)
-        self.osfamily = 'arch'
-        cfg['ssh_svcname'] = 'sshd'
+        self.osfamily = "arch"
+        cfg["ssh_svcname"] = "sshd"
 
     def apply_locale(self, locale, out_fn=None):
         if out_fn is not None and out_fn != "/etc/locale.conf":
-            LOG.warning("Invalid locale_configfile %s, only supported "
-                        "value is /etc/locale.conf", out_fn)
+            LOG.warning(
+                "Invalid locale_configfile %s, only supported "
+                "value is /etc/locale.conf",
+                out_fn,
+            )
         lines = [
             util.make_header(),
             # Hard-coding the charset isn't ideal, but there is no other way.
-            '%s UTF-8' % (locale),
+            "%s UTF-8" % (locale),
             "",
         ]
         util.write_file(self.locale_gen_fn, "\n".join(lines))
-        subp.subp(['locale-gen'], capture=False)
+        subp.subp(["locale-gen"], capture=False)
         # In the future systemd can handle locale-gen stuff:
         # https://github.com/systemd/systemd/pull/9864
-        subp.subp(['localectl', 'set-locale', locale], capture=False)
+        subp.subp(["localectl", "set-locale", locale], capture=False)
 
     def install_packages(self, pkglist):
         self.update_package_sources()
-        self.package_command('', pkgs=pkglist)
+        self.package_command("", pkgs=pkglist)
 
     def _write_network_state(self, network_state):
         try:
@@ -70,32 +70,42 @@ class Distro(distros.Distro):
 
     def _write_network(self, settings):
         entries = net_util.translate_network(settings)
-        LOG.debug("Translated ubuntu style network settings %s into %s",
-                  settings, entries)
+        LOG.debug(
+            "Translated ubuntu style network settings %s into %s",
+            settings,
+            entries,
+        )
         return _render_network(
-            entries, resolv_conf=self.resolve_conf_fn,
+            entries,
+            resolv_conf=self.resolve_conf_fn,
             conf_dir=self.network_conf_dir,
-            enable_func=self._enable_interface)
+            enable_func=self._enable_interface,
+        )
 
     def _enable_interface(self, device_name):
-        cmd = ['netctl', 'reenable', device_name]
+        cmd = ["netctl", "reenable", device_name]
         try:
             (_out, err) = subp.subp(cmd)
             if len(err):
-                LOG.warning("Running %s resulted in stderr output: %s",
-                            cmd, err)
+                LOG.warning(
+                    "Running %s resulted in stderr output: %s", cmd, err
+                )
         except subp.ProcessExecutionError:
             util.logexc(LOG, "Running interface command %s failed", cmd)
 
     def _bring_up_interface(self, device_name):
-        cmd = ['netctl', 'restart', device_name]
-        LOG.debug("Attempting to run bring up interface %s using command %s",
-                  device_name, cmd)
+        cmd = ["netctl", "restart", device_name]
+        LOG.debug(
+            "Attempting to run bring up interface %s using command %s",
+            device_name,
+            cmd,
+        )
         try:
             (_out, err) = subp.subp(cmd)
             if len(err):
-                LOG.warning("Running %s resulted in stderr output: %s",
-                            cmd, err)
+                LOG.warning(
+                    "Running %s resulted in stderr output: %s", cmd, err
+                )
             return True
         except subp.ProcessExecutionError:
             util.logexc(LOG, "Running interface command %s failed", cmd)
@@ -110,7 +120,7 @@ class Distro(distros.Distro):
         except IOError:
             pass
         if not conf:
-            conf = HostnameConf('')
+            conf = HostnameConf("")
         conf.set_hostname(hostname)
         util.write_file(filename, str(conf), omode="w", mode=0o644)
 
@@ -137,13 +147,17 @@ class Distro(distros.Distro):
     # hostname (inetutils) isn't installed per default on arch, so we use
     # hostnamectl which is installed per default (systemd).
     def _apply_hostname(self, hostname):
-        LOG.debug("Non-persistently setting the system hostname to %s",
-                  hostname)
+        LOG.debug(
+            "Non-persistently setting the system hostname to %s", hostname
+        )
         try:
-            subp.subp(['hostnamectl', '--transient', 'set-hostname', hostname])
+            subp.subp(["hostnamectl", "--transient", "set-hostname", hostname])
         except subp.ProcessExecutionError:
-            util.logexc(LOG, "Failed to non-persistently adjust the system "
-                        "hostname to %s", hostname)
+            util.logexc(
+                LOG,
+                "Failed to non-persistently adjust the system hostname to %s",
+                hostname,
+            )
 
     def set_timezone(self, tz):
         distros.set_etc_timezone(tz=tz, tz_file=self._find_tz_file(tz))
@@ -152,7 +166,7 @@ class Distro(distros.Distro):
         if pkgs is None:
             pkgs = []
 
-        cmd = ['pacman', "-Sy", "--quiet", "--noconfirm"]
+        cmd = ["pacman", "-Sy", "--quiet", "--noconfirm"]
         # Redirect output
 
         if args and isinstance(args, str):
@@ -165,19 +179,25 @@ class Distro(distros.Distro):
         if command:
             cmd.append(command)
 
-        pkglist = util.expand_package_list('%s-%s', pkgs)
+        pkglist = util.expand_package_list("%s-%s", pkgs)
         cmd.extend(pkglist)
 
         # Allow the output of this to flow outwards (ie not be captured)
         subp.subp(cmd, capture=False)
 
     def update_package_sources(self):
-        self._runner.run("update-sources", self.package_command,
-                         ["-y"], freq=PER_INSTANCE)
-
-
-def _render_network(entries, target="/", conf_dir="etc/netctl",
-                    resolv_conf="etc/resolv.conf", enable_func=None):
+        self._runner.run(
+            "update-sources", self.package_command, ["-y"], freq=PER_INSTANCE
+        )
+
+
+def _render_network(
+    entries,
+    target="/",
+    conf_dir="etc/netctl",
+    resolv_conf="etc/resolv.conf",
+    enable_func=None,
+):
     """Render the translate_network format into netctl files in target.
     Paths will be rendered under target.
     """
@@ -188,29 +208,27 @@ def _render_network(entries, target="/", conf_dir="etc/netctl",
     conf_dir = subp.target_path(target, conf_dir)
 
     for (dev, info) in entries.items():
-        if dev == 'lo':
+        if dev == "lo":
             # no configuration should be rendered for 'lo'
             continue
         devs.append(dev)
         net_fn = os.path.join(conf_dir, dev)
         net_cfg = {
-            'Connection': 'ethernet',
-            'Interface': dev,
-            'IP': info.get('bootproto'),
-            'Address': "%s/%s" % (info.get('address'),
-                                  info.get('netmask')),
-            'Gateway': info.get('gateway'),
-            'DNS': info.get('dns-nameservers', []),
+            "Connection": "ethernet",
+            "Interface": dev,
+            "IP": info.get("bootproto"),
+            "Address": "%s/%s" % (info.get("address"), info.get("netmask")),
+            "Gateway": info.get("gateway"),
+            "DNS": info.get("dns-nameservers", []),
         }
         util.write_file(net_fn, convert_netctl(net_cfg))
-        if enable_func and info.get('auto'):
+        if enable_func and info.get("auto"):
             enable_func(dev)
-        if 'dns-nameservers' in info:
-            nameservers.extend(info['dns-nameservers'])
+        if "dns-nameservers" in info:
+            nameservers.extend(info["dns-nameservers"])
 
     if nameservers:
-        util.write_file(resolv_conf,
-                        convert_resolv_conf(nameservers))
+        util.write_file(resolv_conf, convert_resolv_conf(nameservers))
     return devs
 
 
@@ -227,17 +245,18 @@ def convert_netctl(settings):
         if val is None:
             val = ""
         elif isinstance(val, (tuple, list)):
-            val = "(" + ' '.join("'%s'" % v for v in val) + ")"
+            val = "(" + " ".join("'%s'" % v for v in val) + ")"
         result.append("%s=%s\n" % (key, val))
-    return ''.join(result)
+    return "".join(result)
 
 
 def convert_resolv_conf(settings):
     """Returns a settings string formatted for resolv.conf."""
-    result = ''
+    result = ""
     if isinstance(settings, list):
         for ns in settings:
-            result = result + 'nameserver %s\n' % ns
+            result = result + "nameserver %s\n" % ns
     return result
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/bsd.py b/cloudinit/distros/bsd.py
index c2fc1e0b..1b4498b3 100644
--- a/cloudinit/distros/bsd.py
+++ b/cloudinit/distros/bsd.py
@@ -1,12 +1,10 @@
 import platform
 
-from cloudinit import distros
-from cloudinit.distros import bsd_utils
-from cloudinit import helpers
+from cloudinit import distros, helpers
 from cloudinit import log as logging
-from cloudinit import net
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import net, subp, util
+from cloudinit.distros import bsd_utils
+
 from .networking import BSDNetworking
 
 LOG = logging.getLogger(__name__)
@@ -14,12 +12,12 @@ LOG = logging.getLogger(__name__)
 
 class BSD(distros.Distro):
     networking_cls = BSDNetworking
-    hostname_conf_fn = '/etc/rc.conf'
+    hostname_conf_fn = "/etc/rc.conf"
     rc_conf_fn = "/etc/rc.conf"
 
     # This differs from the parent Distro class, which has -P for
     # poweroff.
-    shutdown_options_map = {'halt': '-H', 'poweroff': '-p', 'reboot': '-r'}
+    shutdown_options_map = {"halt": "-H", "poweroff": "-p", "reboot": "-r"}
 
     # Set in BSD distro subclasses
     group_add_cmd_prefix = []
@@ -35,7 +33,7 @@ class BSD(distros.Distro):
         # calls from repeatly happening (when they
         # should only happen say once per instance...)
         self._runner = helpers.Runners(paths)
-        cfg['ssh_svcname'] = 'sshd'
+        cfg["ssh_svcname"] = "sshd"
         self.osfamily = platform.system().lower()
 
     def _read_system_hostname(self):
@@ -43,13 +41,13 @@ class BSD(distros.Distro):
         return (self.hostname_conf_fn, sys_hostname)
 
     def _read_hostname(self, filename, default=None):
-        return bsd_utils.get_rc_config_value('hostname')
+        return bsd_utils.get_rc_config_value("hostname")
 
     def _get_add_member_to_group_cmd(self, member_name, group_name):
-        raise NotImplementedError('Return list cmd to add member to group')
+        raise NotImplementedError("Return list cmd to add member to group")
 
     def _write_hostname(self, hostname, filename):
-        bsd_utils.set_rc_config_value('hostname', hostname, fn='/etc/rc.conf')
+        bsd_utils.set_rc_config_value("hostname", hostname, fn="/etc/rc.conf")
 
     def create_group(self, name, members=None):
         if util.is_group(name):
@@ -66,45 +64,55 @@ class BSD(distros.Distro):
             members = []
         for member in members:
             if not util.is_user(member):
-                LOG.warning("Unable to add group member '%s' to group '%s'"
-                            "; user does not exist.", member, name)
+                LOG.warning(
+                    "Unable to add group member '%s' to group '%s'"
+                    "; user does not exist.",
+                    member,
+                    name,
+                )
                 continue
             try:
                 subp.subp(self._get_add_member_to_group_cmd(member, name))
                 LOG.info("Added user '%s' to group '%s'", member, name)
             except Exception:
-                util.logexc(LOG, "Failed to add user '%s' to group '%s'",
-                            member, name)
+                util.logexc(
+                    LOG, "Failed to add user '%s' to group '%s'", member, name
+                )
 
     def generate_fallback_config(self):
-        nconf = {'config': [], 'version': 1}
+        nconf = {"config": [], "version": 1}
         for mac, name in net.get_interfaces_by_mac().items():
-            nconf['config'].append(
-                {'type': 'physical', 'name': name,
-                 'mac_address': mac, 'subnets': [{'type': 'dhcp'}]})
+            nconf["config"].append(
+                {
+                    "type": "physical",
+                    "name": name,
+                    "mac_address": mac,
+                    "subnets": [{"type": "dhcp"}],
+                }
+            )
         return nconf
 
     def install_packages(self, pkglist):
         self.update_package_sources()
-        self.package_command('install', pkgs=pkglist)
+        self.package_command("install", pkgs=pkglist)
 
     def _get_pkg_cmd_environ(self):
         """Return environment vars used in *BSD package_command operations"""
-        raise NotImplementedError('BSD subclasses return a dict of env vars')
+        raise NotImplementedError("BSD subclasses return a dict of env vars")
 
     def package_command(self, command, args=None, pkgs=None):
         if pkgs is None:
             pkgs = []
 
-        if command == 'install':
+        if command == "install":
             cmd = self.pkg_cmd_install_prefix
-        elif command == 'remove':
+        elif command == "remove":
             cmd = self.pkg_cmd_remove_prefix
-        elif command == 'update':
+        elif command == "update":
             if not self.pkg_cmd_update_prefix:
                 return
             cmd = self.pkg_cmd_update_prefix
-        elif command == 'upgrade':
+        elif command == "upgrade":
             if not self.pkg_cmd_upgrade_prefix:
                 return
             cmd = self.pkg_cmd_upgrade_prefix
@@ -114,7 +122,7 @@ class BSD(distros.Distro):
         elif args and isinstance(args, list):
             cmd.extend(args)
 
-        pkglist = util.expand_package_list('%s-%s', pkgs)
+        pkglist = util.expand_package_list("%s-%s", pkgs)
         cmd.extend(pkglist)
 
         # Allow the output of this to flow outwards (ie not be captured)
@@ -124,7 +132,7 @@ class BSD(distros.Distro):
         distros.set_etc_timezone(tz=tz, tz_file=self._find_tz_file(tz))
 
     def apply_locale(self, locale, out_fn=None):
-        LOG.debug('Cannot set the locale.')
+        LOG.debug("Cannot set the locale.")
 
     def apply_network_config_names(self, netconfig):
-        LOG.debug('Cannot rename network interface.')
+        LOG.debug("Cannot rename network interface.")
diff --git a/cloudinit/distros/bsd_utils.py b/cloudinit/distros/bsd_utils.py
index 079d0d53..00cd0662 100644
--- a/cloudinit/distros/bsd_utils.py
+++ b/cloudinit/distros/bsd_utils.py
@@ -18,31 +18,31 @@ def _unquote(value):
     return value
 
 
-def get_rc_config_value(key, fn='/etc/rc.conf'):
-    key_prefix = '{}='.format(key)
+def get_rc_config_value(key, fn="/etc/rc.conf"):
+    key_prefix = "{}=".format(key)
     for line in util.load_file(fn).splitlines():
         if line.startswith(key_prefix):
-            value = line.replace(key_prefix, '')
+            value = line.replace(key_prefix, "")
             return _unquote(value)
 
 
-def set_rc_config_value(key, value, fn='/etc/rc.conf'):
+def set_rc_config_value(key, value, fn="/etc/rc.conf"):
     lines = []
     done = False
     value = shlex.quote(value)
     original_content = util.load_file(fn)
     for line in original_content.splitlines():
-        if '=' in line:
-            k, v = line.split('=', 1)
+        if "=" in line:
+            k, v = line.split("=", 1)
             if k == key:
                 v = value
                 done = True
-            lines.append('='.join([k, v]))
+            lines.append("=".join([k, v]))
         else:
             lines.append(line)
     if not done:
-        lines.append('='.join([key, value]))
-    new_content = '\n'.join(lines) + '\n'
+        lines.append("=".join([key, value]))
+    new_content = "\n".join(lines) + "\n"
     if new_content != original_content:
         util.write_file(fn, new_content)
 
diff --git a/cloudinit/distros/centos.py b/cloudinit/distros/centos.py
index edb3165d..3dc0a342 100644
--- a/cloudinit/distros/centos.py
+++ b/cloudinit/distros/centos.py
@@ -6,4 +6,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/cloudlinux.py b/cloudinit/distros/cloudlinux.py
index edb3165d..3dc0a342 100644
--- a/cloudinit/distros/cloudlinux.py
+++ b/cloudinit/distros/cloudlinux.py
@@ -6,4 +6,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/debian.py b/cloudinit/distros/debian.py
index b2af0866..0105a383 100644
--- a/cloudinit/distros/debian.py
+++ b/cloudinit/distros/debian.py
@@ -11,25 +11,25 @@ import fcntl
 import os
 import time
 
-from cloudinit import distros
-from cloudinit import helpers
+from cloudinit import distros, helpers
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import subp, util
 from cloudinit.distros.parsers.hostname import HostnameConf
-
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
 APT_LOCK_WAIT_TIMEOUT = 30
-APT_GET_COMMAND = ('apt-get', '--option=Dpkg::Options::=--force-confold',
-                   '--option=Dpkg::options::=--force-unsafe-io',
-                   '--assume-yes', '--quiet')
+APT_GET_COMMAND = (
+    "apt-get",
+    "--option=Dpkg::Options::=--force-confold",
+    "--option=Dpkg::options::=--force-unsafe-io",
+    "--assume-yes",
+    "--quiet",
+)
 APT_GET_WRAPPER = {
-    'command': 'eatmydata',
-    'enabled': 'auto',
+    "command": "eatmydata",
+    "enabled": "auto",
 }
 
 NETWORK_FILE_HEADER = """\
@@ -50,10 +50,10 @@ LOCALE_CONF_FN = "/etc/default/locale"
 # More context:
 #   https://github.com/canonical/cloud-init/pull/1034#issuecomment-986971376
 APT_LOCK_FILES = [
-    '/var/lib/dpkg/lock-frontend',
-    '/var/lib/dpkg/lock',
-    '/var/cache/apt/archives/lock',
-    '/var/lib/apt/lists/lock',
+    "/var/lib/dpkg/lock-frontend",
+    "/var/lib/dpkg/lock",
+    "/var/cache/apt/archives/lock",
+    "/var/lib/apt/lists/lock",
 ]
 
 
@@ -61,14 +61,18 @@ class Distro(distros.Distro):
     hostname_conf_fn = "/etc/hostname"
     network_conf_fn = {
         "eni": "/etc/network/interfaces.d/50-cloud-init",
-        "netplan": "/etc/netplan/50-cloud-init.yaml"
+        "netplan": "/etc/netplan/50-cloud-init.yaml",
     }
     renderer_configs = {
-        "eni": {"eni_path": network_conf_fn["eni"],
-                "eni_header": NETWORK_FILE_HEADER},
-        "netplan": {"netplan_path": network_conf_fn["netplan"],
-                    "netplan_header": NETWORK_FILE_HEADER,
-                    "postcmds": True}
+        "eni": {
+            "eni_path": network_conf_fn["eni"],
+            "eni_header": NETWORK_FILE_HEADER,
+        },
+        "netplan": {
+            "netplan_path": network_conf_fn["netplan"],
+            "netplan_header": NETWORK_FILE_HEADER,
+            "postcmds": True,
+        },
     }
 
     def __init__(self, name, cfg, paths):
@@ -77,8 +81,8 @@ class Distro(distros.Distro):
         # calls from repeatly happening (when they
         # should only happen say once per instance...)
         self._runner = helpers.Runners(paths)
-        self.osfamily = 'debian'
-        self.default_locale = 'en_US.UTF-8'
+        self.osfamily = "debian"
+        self.default_locale = "en_US.UTF-8"
         self.system_locale = None
 
     def get_locale(self):
@@ -89,25 +93,29 @@ class Distro(distros.Distro):
             self.system_locale = read_system_locale()
 
         # Return system_locale setting if valid, else use default locale
-        return (self.system_locale if self.system_locale else
-                self.default_locale)
+        return (
+            self.system_locale if self.system_locale else self.default_locale
+        )
 
-    def apply_locale(self, locale, out_fn=None, keyname='LANG'):
+    def apply_locale(self, locale, out_fn=None, keyname="LANG"):
         """Apply specified locale to system, regenerate if specified locale
-            differs from system default."""
+        differs from system default."""
         if not out_fn:
             out_fn = LOCALE_CONF_FN
 
         if not locale:
-            raise ValueError('Failed to provide locale value.')
+            raise ValueError("Failed to provide locale value.")
 
         # Only call locale regeneration if needed
         # Update system locale config with specified locale if needed
         distro_locale = self.get_locale()
         conf_fn_exists = os.path.exists(out_fn)
         sys_locale_unset = False if self.system_locale else True
-        need_regen = (locale.lower() != distro_locale.lower() or
-                      not conf_fn_exists or sys_locale_unset)
+        need_regen = (
+            locale.lower() != distro_locale.lower()
+            or not conf_fn_exists
+            or sys_locale_unset
+        )
         need_conf = not conf_fn_exists or need_regen or sys_locale_unset
 
         if need_regen:
@@ -115,7 +123,10 @@ class Distro(distros.Distro):
         else:
             LOG.debug(
                 "System has '%s=%s' requested '%s', skipping regeneration.",
-                keyname, self.system_locale, locale)
+                keyname,
+                self.system_locale,
+                locale,
+            )
 
         if need_conf:
             update_locale_conf(locale, out_fn, keyname=keyname)
@@ -124,7 +135,7 @@ class Distro(distros.Distro):
 
     def install_packages(self, pkglist):
         self.update_package_sources()
-        self.package_command('install', pkgs=pkglist)
+        self.package_command("install", pkgs=pkglist)
 
     def _write_network_state(self, network_state):
         _maybe_remove_legacy_eth0()
@@ -139,7 +150,7 @@ class Distro(distros.Distro):
         except IOError:
             pass
         if not conf:
-            conf = HostnameConf('')
+            conf = HostnameConf("")
         conf.set_hostname(hostname)
         util.write_file(filename, str(conf), 0o644)
 
@@ -181,7 +192,7 @@ class Distro(distros.Distro):
             if not os.path.exists(lock):
                 # Only wait for lock files that already exist
                 continue
-            with open(lock, 'w') as handle:
+            with open(lock, "w") as handle:
                 try:
                     fcntl.lockf(handle, fcntl.LOCK_EX | fcntl.LOCK_NB)
                 except OSError:
@@ -197,17 +208,17 @@ class Distro(distros.Distro):
         subp_kwargs: kwargs to pass to subp
         """
         start_time = time.time()
-        LOG.debug('Waiting for apt lock')
+        LOG.debug("Waiting for apt lock")
         while time.time() - start_time < timeout:
             if not self._apt_lock_available():
                 time.sleep(1)
                 continue
-            LOG.debug('apt lock available')
+            LOG.debug("apt lock available")
             try:
                 # Allow the output of this to flow outwards (not be captured)
                 log_msg = "apt-%s [%s]" % (
                     short_cmd,
-                    ' '.join(subp_kwargs['args'])
+                    " ".join(subp_kwargs["args"]),
                 )
                 return util.log_time(
                     logfunc=LOG.debug,
@@ -228,9 +239,9 @@ class Distro(distros.Distro):
                 # error received. If the lock is unavailable, just keep waiting
                 if self._apt_lock_available():
                     raise
-                LOG.debug('Another process holds apt lock. Waiting...')
+                LOG.debug("Another process holds apt lock. Waiting...")
                 time.sleep(1)
-        raise TimeoutError('Could not get apt lock')
+        raise TimeoutError("Could not get apt lock")
 
     def package_command(self, command, args=None, pkgs=None):
         """Run the given package command.
@@ -247,12 +258,13 @@ class Distro(distros.Distro):
 
         e = os.environ.copy()
         # See: http://manpages.ubuntu.com/manpages/xenial/man7/debconf.7.html
-        e['DEBIAN_FRONTEND'] = 'noninteractive'
+        e["DEBIAN_FRONTEND"] = "noninteractive"
 
         wcfg = self.get_option("apt_get_wrapper", APT_GET_WRAPPER)
         cmd = _get_wrapper_prefix(
-            wcfg.get('command', APT_GET_WRAPPER['command']),
-            wcfg.get('enabled', APT_GET_WRAPPER['enabled']))
+            wcfg.get("command", APT_GET_WRAPPER["command"]),
+            wcfg.get("enabled", APT_GET_WRAPPER["enabled"]),
+        )
 
         cmd.extend(list(self.get_option("apt_get_command", APT_GET_COMMAND)))
 
@@ -263,22 +275,27 @@ class Distro(distros.Distro):
 
         subcmd = command
         if command == "upgrade":
-            subcmd = self.get_option("apt_get_upgrade_subcommand",
-                                     "dist-upgrade")
+            subcmd = self.get_option(
+                "apt_get_upgrade_subcommand", "dist-upgrade"
+            )
 
         cmd.append(subcmd)
 
-        pkglist = util.expand_package_list('%s=%s', pkgs)
+        pkglist = util.expand_package_list("%s=%s", pkgs)
         cmd.extend(pkglist)
 
         self._wait_for_apt_command(
             short_cmd=command,
-            subp_kwargs={'args': cmd, 'env': e, 'capture': False}
+            subp_kwargs={"args": cmd, "env": e, "capture": False},
         )
 
     def update_package_sources(self):
-        self._runner.run("update-sources", self.package_command,
-                         ["update"], freq=PER_INSTANCE)
+        self._runner.run(
+            "update-sources",
+            self.package_command,
+            ["update"],
+            freq=PER_INSTANCE,
+        )
 
     def get_primary_arch(self):
         return util.get_dpkg_architecture()
@@ -288,9 +305,9 @@ def _get_wrapper_prefix(cmd, mode):
     if isinstance(cmd, str):
         cmd = [str(cmd)]
 
-    if (util.is_true(mode) or
-        (str(mode).lower() == "auto" and cmd[0] and
-         subp.which(cmd[0]))):
+    if util.is_true(mode) or (
+        str(mode).lower() == "auto" and cmd[0] and subp.which(cmd[0])
+    ):
         return cmd
     else:
         return []
@@ -298,13 +315,13 @@ def _get_wrapper_prefix(cmd, mode):
 
 def _maybe_remove_legacy_eth0(path="/etc/network/interfaces.d/eth0.cfg"):
     """Ubuntu cloud images previously included a 'eth0.cfg' that had
-       hard coded content.  That file would interfere with the rendered
-       configuration if it was present.
+    hard coded content.  That file would interfere with the rendered
+    configuration if it was present.
 
-       if the file does not exist do nothing.
-       If the file exists:
-         - with known content, remove it and warn
-         - with unknown content, leave it and warn
+    if the file does not exist do nothing.
+    If the file exists:
+      - with known content, remove it and warn
+      - with unknown content, leave it and warn
     """
 
     if not os.path.exists(path):
@@ -314,24 +331,25 @@ def _maybe_remove_legacy_eth0(path="/etc/network/interfaces.d/eth0.cfg"):
     try:
         contents = util.load_file(path)
         known_contents = ["auto eth0", "iface eth0 inet dhcp"]
-        lines = [f.strip() for f in contents.splitlines()
-                 if not f.startswith("#")]
+        lines = [
+            f.strip() for f in contents.splitlines() if not f.startswith("#")
+        ]
         if lines == known_contents:
             util.del_file(path)
             msg = "removed %s with known contents" % path
         else:
-            msg = (bmsg + " '%s' exists with user configured content." % path)
+            msg = bmsg + " '%s' exists with user configured content." % path
     except Exception:
         msg = bmsg + " %s exists, but could not be read." % path
 
     LOG.warning(msg)
 
 
-def read_system_locale(sys_path=LOCALE_CONF_FN, keyname='LANG'):
+def read_system_locale(sys_path=LOCALE_CONF_FN, keyname="LANG"):
     """Read system default locale setting, if present"""
     sys_val = ""
     if not sys_path:
-        raise ValueError('Invalid path: %s' % sys_path)
+        raise ValueError("Invalid path: %s" % sys_path)
 
     if os.path.exists(sys_path):
         locale_content = util.load_file(sys_path)
@@ -341,16 +359,22 @@ def read_system_locale(sys_path=LOCALE_CONF_FN, keyname='LANG'):
     return sys_val
 
 
-def update_locale_conf(locale, sys_path, keyname='LANG'):
+def update_locale_conf(locale, sys_path, keyname="LANG"):
     """Update system locale config"""
-    LOG.debug('Updating %s with locale setting %s=%s',
-              sys_path, keyname, locale)
+    LOG.debug(
+        "Updating %s with locale setting %s=%s", sys_path, keyname, locale
+    )
     subp.subp(
-        ['update-locale', '--locale-file=' + sys_path,
-         '%s=%s' % (keyname, locale)], capture=False)
+        [
+            "update-locale",
+            "--locale-file=" + sys_path,
+            "%s=%s" % (keyname, locale),
+        ],
+        capture=False,
+    )
 
 
-def regenerate_locale(locale, sys_path, keyname='LANG'):
+def regenerate_locale(locale, sys_path, keyname="LANG"):
     """
     Run locale-gen for the provided locale and set the default
     system variable `keyname` appropriately in the provided `sys_path`.
@@ -361,13 +385,13 @@ def regenerate_locale(locale, sys_path, keyname='LANG'):
     # C
     # C.UTF-8
     # POSIX
-    if locale.lower() in ['c', 'c.utf-8', 'posix']:
-        LOG.debug('%s=%s does not require rengeneration', keyname, locale)
+    if locale.lower() in ["c", "c.utf-8", "posix"]:
+        LOG.debug("%s=%s does not require rengeneration", keyname, locale)
         return
 
     # finally, trigger regeneration
-    LOG.debug('Generating locales for %s', locale)
-    subp.subp(['locale-gen', locale], capture=False)
+    LOG.debug("Generating locales for %s", locale)
+    subp.subp(["locale-gen", locale], capture=False)
 
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/dragonflybsd.py b/cloudinit/distros/dragonflybsd.py
index 2d825518..0d02bee0 100644
--- a/cloudinit/distros/dragonflybsd.py
+++ b/cloudinit/distros/dragonflybsd.py
@@ -6,7 +6,7 @@ import cloudinit.distros.freebsd
 
 
 class Distro(cloudinit.distros.freebsd.Distro):
-    home_dir = '/home'
+    home_dir = "/home"
 
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/eurolinux.py b/cloudinit/distros/eurolinux.py
index edb3165d..3dc0a342 100644
--- a/cloudinit/distros/eurolinux.py
+++ b/cloudinit/distros/eurolinux.py
@@ -6,4 +6,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/fedora.py b/cloudinit/distros/fedora.py
index 0fe1fbca..39203225 100644
--- a/cloudinit/distros/fedora.py
+++ b/cloudinit/distros/fedora.py
@@ -14,4 +14,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/freebsd.py b/cloudinit/distros/freebsd.py
index d94a52b8..513abdc2 100644
--- a/cloudinit/distros/freebsd.py
+++ b/cloudinit/distros/freebsd.py
@@ -10,8 +10,7 @@ from io import StringIO
 
 import cloudinit.distros.bsd
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
@@ -24,41 +23,41 @@ class Distro(cloudinit.distros.bsd.BSD):
     (N.B. DragonFlyBSD inherits from this class.)
     """
 
-    usr_lib_exec = '/usr/local/lib'
-    login_conf_fn = '/etc/login.conf'
-    login_conf_fn_bak = '/etc/login.conf.orig'
-    ci_sudoers_fn = '/usr/local/etc/sudoers.d/90-cloud-init-users'
-    group_add_cmd_prefix = ['pw', 'group', 'add']
+    usr_lib_exec = "/usr/local/lib"
+    login_conf_fn = "/etc/login.conf"
+    login_conf_fn_bak = "/etc/login.conf.orig"
+    ci_sudoers_fn = "/usr/local/etc/sudoers.d/90-cloud-init-users"
+    group_add_cmd_prefix = ["pw", "group", "add"]
     pkg_cmd_install_prefix = ["pkg", "install"]
     pkg_cmd_remove_prefix = ["pkg", "remove"]
     pkg_cmd_update_prefix = ["pkg", "update"]
     pkg_cmd_upgrade_prefix = ["pkg", "upgrade"]
     prefer_fqdn = True  # See rc.conf(5) in FreeBSD
-    home_dir = '/usr/home'
+    home_dir = "/usr/home"
 
     def _get_add_member_to_group_cmd(self, member_name, group_name):
-        return ['pw', 'usermod', '-n', member_name, '-G', group_name]
+        return ["pw", "usermod", "-n", member_name, "-G", group_name]
 
     def add_user(self, name, **kwargs):
         if util.is_user(name):
             LOG.info("User %s already exists, skipping.", name)
             return False
 
-        pw_useradd_cmd = ['pw', 'useradd', '-n', name]
-        log_pw_useradd_cmd = ['pw', 'useradd', '-n', name]
+        pw_useradd_cmd = ["pw", "useradd", "-n", name]
+        log_pw_useradd_cmd = ["pw", "useradd", "-n", name]
 
         pw_useradd_opts = {
-            "homedir": '-d',
-            "gecos": '-c',
-            "primary_group": '-g',
-            "groups": '-G',
-            "shell": '-s',
-            "inactive": '-E',
+            "homedir": "-d",
+            "gecos": "-c",
+            "primary_group": "-g",
+            "groups": "-G",
+            "shell": "-s",
+            "inactive": "-E",
         }
         pw_useradd_flags = {
-            "no_user_group": '--no-user-group',
-            "system": '--system',
-            "no_log_init": '--no-log-init',
+            "no_user_group": "--no-user-group",
+            "system": "--system",
+            "no_log_init": "--no-log-init",
         }
 
         for key, val in kwargs.items():
@@ -69,17 +68,19 @@ class Distro(cloudinit.distros.bsd.BSD):
                 pw_useradd_cmd.append(pw_useradd_flags[key])
                 log_pw_useradd_cmd.append(pw_useradd_flags[key])
 
-        if 'no_create_home' in kwargs or 'system' in kwargs:
-            pw_useradd_cmd.append('-d/nonexistent')
-            log_pw_useradd_cmd.append('-d/nonexistent')
+        if "no_create_home" in kwargs or "system" in kwargs:
+            pw_useradd_cmd.append("-d/nonexistent")
+            log_pw_useradd_cmd.append("-d/nonexistent")
         else:
-            pw_useradd_cmd.append('-d{home_dir}/{name}'.format(
-                home_dir=self.home_dir, name=name))
-            pw_useradd_cmd.append('-m')
-            log_pw_useradd_cmd.append('-d{home_dir}/{name}'.format(
-                home_dir=self.home_dir, name=name))
+            pw_useradd_cmd.append(
+                "-d{home_dir}/{name}".format(home_dir=self.home_dir, name=name)
+            )
+            pw_useradd_cmd.append("-m")
+            log_pw_useradd_cmd.append(
+                "-d{home_dir}/{name}".format(home_dir=self.home_dir, name=name)
+            )
 
-            log_pw_useradd_cmd.append('-m')
+            log_pw_useradd_cmd.append("-m")
 
         # Run the command
         LOG.info("Adding user %s", name)
@@ -90,13 +91,13 @@ class Distro(cloudinit.distros.bsd.BSD):
             raise
         # Set the password if it is provided
         # For security consideration, only hashed passwd is assumed
-        passwd_val = kwargs.get('passwd', None)
+        passwd_val = kwargs.get("passwd", None)
         if passwd_val is not None:
             self.set_passwd(name, passwd_val, hashed=True)
 
     def expire_passwd(self, user):
         try:
-            subp.subp(['pw', 'usermod', user, '-p', '01-Jan-1970'])
+            subp.subp(["pw", "usermod", user, "-p", "01-Jan-1970"])
         except Exception:
             util.logexc(LOG, "Failed to set pw expiration for %s", user)
             raise
@@ -108,15 +109,18 @@ class Distro(cloudinit.distros.bsd.BSD):
             hash_opt = "-h"
 
         try:
-            subp.subp(['pw', 'usermod', user, hash_opt, '0'],
-                      data=passwd, logstring="chpasswd for %s" % user)
+            subp.subp(
+                ["pw", "usermod", user, hash_opt, "0"],
+                data=passwd,
+                logstring="chpasswd for %s" % user,
+            )
         except Exception:
             util.logexc(LOG, "Failed to set password for %s", user)
             raise
 
     def lock_passwd(self, name):
         try:
-            subp.subp(['pw', 'usermod', name, '-h', '-'])
+            subp.subp(["pw", "usermod", name, "-h", "-"])
         except Exception:
             util.logexc(LOG, "Failed to lock user %s", name)
             raise
@@ -125,8 +129,9 @@ class Distro(cloudinit.distros.bsd.BSD):
         # Adjust the locales value to the new value
         newconf = StringIO()
         for line in util.load_file(self.login_conf_fn).splitlines():
-            newconf.write(re.sub(r'^default:',
-                                 r'default:lang=%s:' % locale, line))
+            newconf.write(
+                re.sub(r"^default:", r"default:lang=%s:" % locale, line)
+            )
             newconf.write("\n")
 
         # Make a backup of login.conf.
@@ -137,15 +142,16 @@ class Distro(cloudinit.distros.bsd.BSD):
 
         try:
             LOG.debug("Running cap_mkdb for %s", locale)
-            subp.subp(['cap_mkdb', self.login_conf_fn])
+            subp.subp(["cap_mkdb", self.login_conf_fn])
         except subp.ProcessExecutionError:
             # cap_mkdb failed, so restore the backup.
             util.logexc(LOG, "Failed to apply locale %s", locale)
             try:
                 util.copy(self.login_conf_fn_bak, self.login_conf_fn)
             except IOError:
-                util.logexc(LOG, "Failed to restore %s backup",
-                            self.login_conf_fn)
+                util.logexc(
+                    LOG, "Failed to restore %s backup", self.login_conf_fn
+                )
 
     def apply_network_config_names(self, netconfig):
         # This is handled by the freebsd network renderer. It writes in
@@ -157,13 +163,16 @@ class Distro(cloudinit.distros.bsd.BSD):
     def _get_pkg_cmd_environ(self):
         """Return environment vars used in *BSD package_command operations"""
         e = os.environ.copy()
-        e['ASSUME_ALWAYS_YES'] = 'YES'
+        e["ASSUME_ALWAYS_YES"] = "YES"
         return e
 
     def update_package_sources(self):
         self._runner.run(
-            "update-sources", self.package_command,
-            ["update"], freq=PER_INSTANCE)
+            "update-sources",
+            self.package_command,
+            ["update"],
+            freq=PER_INSTANCE,
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/gentoo.py b/cloudinit/distros/gentoo.py
index 1be76dc8..1384a682 100644
--- a/cloudinit/distros/gentoo.py
+++ b/cloudinit/distros/gentoo.py
@@ -6,25 +6,21 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import distros
-from cloudinit import helpers
+from cloudinit import distros, helpers
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import subp, util
 from cloudinit.distros import net_util
 from cloudinit.distros.parsers.hostname import HostnameConf
-
 from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
 
 class Distro(distros.Distro):
-    locale_conf_fn = '/etc/locale.gen'
-    network_conf_fn = '/etc/conf.d/net'
-    hostname_conf_fn = '/etc/conf.d/hostname'
-    init_cmd = ['rc-service']  # init scripts
+    locale_conf_fn = "/etc/locale.gen"
+    network_conf_fn = "/etc/conf.d/net"
+    hostname_conf_fn = "/etc/conf.d/hostname"
+    init_cmd = ["rc-service"]  # init scripts
 
     def __init__(self, name, cfg, paths):
         distros.Distro.__init__(self, name, cfg, paths)
@@ -32,14 +28,14 @@ class Distro(distros.Distro):
         # calls from repeatly happening (when they
         # should only happen say once per instance...)
         self._runner = helpers.Runners(paths)
-        self.osfamily = 'gentoo'
+        self.osfamily = "gentoo"
         # Fix sshd restarts
-        cfg['ssh_svcname'] = '/etc/init.d/sshd'
+        cfg["ssh_svcname"] = "/etc/init.d/sshd"
 
     def apply_locale(self, locale, out_fn=None):
         if not out_fn:
             out_fn = self.locale_conf_fn
-        subp.subp(['locale-gen', '-G', locale], capture=False)
+        subp.subp(["locale-gen", "-G", locale], capture=False)
         # "" provides trailing newline during join
         lines = [
             util.make_header(),
@@ -50,79 +46,97 @@ class Distro(distros.Distro):
 
     def install_packages(self, pkglist):
         self.update_package_sources()
-        self.package_command('', pkgs=pkglist)
+        self.package_command("", pkgs=pkglist)
 
     def _write_network(self, settings):
         entries = net_util.translate_network(settings)
-        LOG.debug("Translated ubuntu style network settings %s into %s",
-                  settings, entries)
+        LOG.debug(
+            "Translated ubuntu style network settings %s into %s",
+            settings,
+            entries,
+        )
         dev_names = entries.keys()
         nameservers = []
 
         for (dev, info) in entries.items():
-            if 'dns-nameservers' in info:
-                nameservers.extend(info['dns-nameservers'])
-            if dev == 'lo':
+            if "dns-nameservers" in info:
+                nameservers.extend(info["dns-nameservers"])
+            if dev == "lo":
                 continue
-            net_fn = self.network_conf_fn + '.' + dev
-            dns_nameservers = info.get('dns-nameservers')
+            net_fn = self.network_conf_fn + "." + dev
+            dns_nameservers = info.get("dns-nameservers")
             if isinstance(dns_nameservers, (list, tuple)):
-                dns_nameservers = str(tuple(dns_nameservers)).replace(',', '')
+                dns_nameservers = str(tuple(dns_nameservers)).replace(",", "")
             # eth0, {'auto': True, 'ipv6': {}, 'bootproto': 'dhcp'}
             # lo, {'dns-nameservers': ['10.0.1.3'], 'ipv6': {}, 'auto': True}
-            results = ''
-            if info.get('bootproto') == 'dhcp':
+            results = ""
+            if info.get("bootproto") == "dhcp":
                 results += 'config_{name}="dhcp"'.format(name=dev)
             else:
                 results += (
                     'config_{name}="{ip_address} netmask {netmask}"\n'
                     'mac_{name}="{hwaddr}"\n'
-                ).format(name=dev, ip_address=info.get('address'),
-                         netmask=info.get('netmask'),
-                         hwaddr=info.get('hwaddress'))
-                results += 'routes_{name}="default via {gateway}"\n'.format(
+                ).format(
                     name=dev,
-                    gateway=info.get('gateway')
+                    ip_address=info.get("address"),
+                    netmask=info.get("netmask"),
+                    hwaddr=info.get("hwaddress"),
+                )
+                results += 'routes_{name}="default via {gateway}"\n'.format(
+                    name=dev, gateway=info.get("gateway")
                 )
-            if info.get('dns-nameservers'):
+            if info.get("dns-nameservers"):
                 results += 'dns_servers_{name}="{dnsservers}"\n'.format(
-                    name=dev,
-                    dnsservers=dns_nameservers)
+                    name=dev, dnsservers=dns_nameservers
+                )
             util.write_file(net_fn, results)
             self._create_network_symlink(dev)
-            if info.get('auto'):
-                cmd = ['rc-update', 'add', 'net.{name}'.format(name=dev),
-                       'default']
+            if info.get("auto"):
+                cmd = [
+                    "rc-update",
+                    "add",
+                    "net.{name}".format(name=dev),
+                    "default",
+                ]
                 try:
                     (_out, err) = subp.subp(cmd)
                     if len(err):
-                        LOG.warning("Running %s resulted in stderr output: %s",
-                                    cmd, err)
+                        LOG.warning(
+                            "Running %s resulted in stderr output: %s",
+                            cmd,
+                            err,
+                        )
                 except subp.ProcessExecutionError:
-                    util.logexc(LOG, "Running interface command %s failed",
-                                cmd)
+                    util.logexc(
+                        LOG, "Running interface command %s failed", cmd
+                    )
 
         if nameservers:
-            util.write_file(self.resolve_conf_fn,
-                            convert_resolv_conf(nameservers))
+            util.write_file(
+                self.resolve_conf_fn, convert_resolv_conf(nameservers)
+            )
 
         return dev_names
 
     @staticmethod
     def _create_network_symlink(interface_name):
-        file_path = '/etc/init.d/net.{name}'.format(name=interface_name)
+        file_path = "/etc/init.d/net.{name}".format(name=interface_name)
         if not util.is_link(file_path):
-            util.sym_link('/etc/init.d/net.lo', file_path)
+            util.sym_link("/etc/init.d/net.lo", file_path)
 
     def _bring_up_interface(self, device_name):
-        cmd = ['/etc/init.d/net.%s' % device_name, 'restart']
-        LOG.debug("Attempting to run bring up interface %s using command %s",
-                  device_name, cmd)
+        cmd = ["/etc/init.d/net.%s" % device_name, "restart"]
+        LOG.debug(
+            "Attempting to run bring up interface %s using command %s",
+            device_name,
+            cmd,
+        )
         try:
             (_out, err) = subp.subp(cmd)
             if len(err):
-                LOG.warning("Running %s resulted in stderr output: %s",
-                            cmd, err)
+                LOG.warning(
+                    "Running %s resulted in stderr output: %s", cmd, err
+                )
             return True
         except subp.ProcessExecutionError:
             util.logexc(LOG, "Running interface command %s failed", cmd)
@@ -131,20 +145,21 @@ class Distro(distros.Distro):
     def _bring_up_interfaces(self, device_names):
         use_all = False
         for d in device_names:
-            if d == 'all':
+            if d == "all":
                 use_all = True
         if use_all:
             # Grab device names from init scripts
-            cmd = ['ls', '/etc/init.d/net.*']
+            cmd = ["ls", "/etc/init.d/net.*"]
             try:
                 (_out, err) = subp.subp(cmd)
                 if len(err):
-                    LOG.warning("Running %s resulted in stderr output: %s",
-                                cmd, err)
+                    LOG.warning(
+                        "Running %s resulted in stderr output: %s", cmd, err
+                    )
             except subp.ProcessExecutionError:
                 util.logexc(LOG, "Running interface command %s failed", cmd)
                 return False
-            devices = [x.split('.')[2] for x in _out.split('  ')]
+            devices = [x.split(".")[2] for x in _out.split("  ")]
             return distros.Distro._bring_up_interfaces(self, devices)
         else:
             return distros.Distro._bring_up_interfaces(self, device_names)
@@ -158,7 +173,7 @@ class Distro(distros.Distro):
         except IOError:
             pass
         if not conf:
-            conf = HostnameConf('')
+            conf = HostnameConf("")
 
         # Many distro's format is the hostname by itself, and that is the
         # way HostnameConf works but gentoo expects it to be in
@@ -194,7 +209,7 @@ class Distro(distros.Distro):
         if pkgs is None:
             pkgs = []
 
-        cmd = list('emerge')
+        cmd = list("emerge")
         # Redirect output
         cmd.append("--quiet")
 
@@ -206,23 +221,28 @@ class Distro(distros.Distro):
         if command:
             cmd.append(command)
 
-        pkglist = util.expand_package_list('%s-%s', pkgs)
+        pkglist = util.expand_package_list("%s-%s", pkgs)
         cmd.extend(pkglist)
 
         # Allow the output of this to flow outwards (ie not be captured)
         subp.subp(cmd, capture=False)
 
     def update_package_sources(self):
-        self._runner.run("update-sources", self.package_command,
-                         ["-u", "world"], freq=PER_INSTANCE)
+        self._runner.run(
+            "update-sources",
+            self.package_command,
+            ["-u", "world"],
+            freq=PER_INSTANCE,
+        )
 
 
 def convert_resolv_conf(settings):
     """Returns a settings string formatted for resolv.conf."""
-    result = ''
+    result = ""
     if isinstance(settings, list):
         for ns in settings:
-            result += 'nameserver %s\n' % ns
+            result += "nameserver %s\n" % ns
     return result
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/miraclelinux.py b/cloudinit/distros/miraclelinux.py
index c7753387..3dc0a342 100644
--- a/cloudinit/distros/miraclelinux.py
+++ b/cloudinit/distros/miraclelinux.py
@@ -5,4 +5,6 @@ from cloudinit.distros import rhel
 
 class Distro(rhel.Distro):
     pass
+
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/net_util.py b/cloudinit/distros/net_util.py
index edfcd99d..e37fb19b 100644
--- a/cloudinit/distros/net_util.py
+++ b/cloudinit/distros/net_util.py
@@ -68,7 +68,9 @@
 # }
 
 from cloudinit.net.network_state import (
-    net_prefix_to_ipv4_mask, mask_and_ipv4_to_bcast_addr)
+    mask_and_ipv4_to_bcast_addr,
+    net_prefix_to_ipv4_mask,
+)
 
 
 def translate_network(settings):
@@ -86,7 +88,7 @@ def translate_network(settings):
     ifaces = []
     consume = {}
     for (cmd, args) in entries:
-        if cmd == 'iface':
+        if cmd == "iface":
             if consume:
                 ifaces.append(consume)
                 consume = {}
@@ -96,19 +98,19 @@ def translate_network(settings):
     # Check if anything left over to consume
     absorb = False
     for (cmd, args) in consume.items():
-        if cmd == 'iface':
+        if cmd == "iface":
             absorb = True
     if absorb:
         ifaces.append(consume)
     # Now translate
     real_ifaces = {}
     for info in ifaces:
-        if 'iface' not in info:
+        if "iface" not in info:
             continue
-        iface_details = info['iface'].split(None)
+        iface_details = info["iface"].split(None)
         # Check if current device *may* have an ipv6 IP
         use_ipv6 = False
-        if 'inet6' in iface_details:
+        if "inet6" in iface_details:
             use_ipv6 = True
         dev_name = None
         if len(iface_details) >= 1:
@@ -118,55 +120,54 @@ def translate_network(settings):
         if not dev_name:
             continue
         iface_info = {}
-        iface_info['ipv6'] = {}
+        iface_info["ipv6"] = {}
         if len(iface_details) >= 3:
             proto_type = iface_details[2].strip().lower()
             # Seems like this can be 'loopback' which we don't
             # really care about
-            if proto_type in ['dhcp', 'static']:
-                iface_info['bootproto'] = proto_type
+            if proto_type in ["dhcp", "static"]:
+                iface_info["bootproto"] = proto_type
         # These can just be copied over
         if use_ipv6:
-            for k in ['address', 'gateway']:
+            for k in ["address", "gateway"]:
                 if k in info:
                     val = info[k].strip().lower()
                     if val:
-                        iface_info['ipv6'][k] = val
+                        iface_info["ipv6"][k] = val
         else:
-            for k in ['netmask', 'address', 'gateway', 'broadcast']:
+            for k in ["netmask", "address", "gateway", "broadcast"]:
                 if k in info:
                     val = info[k].strip().lower()
                     if val:
                         iface_info[k] = val
             # handle static ip configurations using
             # ipaddress/prefix-length format
-            if 'address' in iface_info:
-                if 'netmask' not in iface_info:
+            if "address" in iface_info:
+                if "netmask" not in iface_info:
                     # check if the address has a network prefix
-                    addr, _, prefix = iface_info['address'].partition('/')
+                    addr, _, prefix = iface_info["address"].partition("/")
                     if prefix:
-                        iface_info['netmask'] = (
-                            net_prefix_to_ipv4_mask(prefix))
-                        iface_info['address'] = addr
+                        iface_info["netmask"] = net_prefix_to_ipv4_mask(prefix)
+                        iface_info["address"] = addr
                         # if we set the netmask, we also can set the broadcast
-                        iface_info['broadcast'] = (
-                            mask_and_ipv4_to_bcast_addr(
-                                iface_info['netmask'], addr))
+                        iface_info["broadcast"] = mask_and_ipv4_to_bcast_addr(
+                            iface_info["netmask"], addr
+                        )
 
             # Name server info provided??
-            if 'dns-nameservers' in info:
-                iface_info['dns-nameservers'] = info['dns-nameservers'].split()
+            if "dns-nameservers" in info:
+                iface_info["dns-nameservers"] = info["dns-nameservers"].split()
             # Name server search info provided??
-            if 'dns-search' in info:
-                iface_info['dns-search'] = info['dns-search'].split()
+            if "dns-search" in info:
+                iface_info["dns-search"] = info["dns-search"].split()
             # Is any mac address spoofing going on??
-            if 'hwaddress' in info:
-                hw_info = info['hwaddress'].lower().strip()
+            if "hwaddress" in info:
+                hw_info = info["hwaddress"].lower().strip()
                 hw_split = hw_info.split(None, 1)
-                if len(hw_split) == 2 and hw_split[0].startswith('ether'):
+                if len(hw_split) == 2 and hw_split[0].startswith("ether"):
                     hw_addr = hw_split[1]
                     if hw_addr:
-                        iface_info['hwaddress'] = hw_addr
+                        iface_info["hwaddress"] = hw_addr
         # If ipv6 is enabled, device will have multiple IPs, so we need to
         # update the dictionary instead of overwriting it...
         if dev_name in real_ifaces:
@@ -179,13 +180,14 @@ def translate_network(settings):
         if not args:
             continue
         dev_name = args[0].strip().lower()
-        if cmd == 'auto':
+        if cmd == "auto":
             # Seems like auto can be like 'auto eth0 eth0:1' so just get the
             # first part out as the device name
             if dev_name in real_ifaces:
-                real_ifaces[dev_name]['auto'] = True
-        if cmd == 'iface' and 'inet6' in args:
-            real_ifaces[dev_name]['inet6'] = True
+                real_ifaces[dev_name]["auto"] = True
+        if cmd == "iface" and "inet6" in args:
+            real_ifaces[dev_name]["inet6"] = True
     return real_ifaces
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/netbsd.py b/cloudinit/distros/netbsd.py
index f1a9b182..9c38ae51 100644
--- a/cloudinit/distros/netbsd.py
+++ b/cloudinit/distros/netbsd.py
@@ -8,8 +8,7 @@ import platform
 
 import cloudinit.distros.bsd
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
@@ -21,42 +20,42 @@ class NetBSD(cloudinit.distros.bsd.BSD):
     (N.B. OpenBSD inherits from this class.)
     """
 
-    ci_sudoers_fn = '/usr/pkg/etc/sudoers.d/90-cloud-init-users'
+    ci_sudoers_fn = "/usr/pkg/etc/sudoers.d/90-cloud-init-users"
     group_add_cmd_prefix = ["groupadd"]
 
     def __init__(self, name, cfg, paths):
         super().__init__(name, cfg, paths)
         if os.path.exists("/usr/pkg/bin/pkgin"):
-            self.pkg_cmd_install_prefix = ['pkgin', '-y', 'install']
-            self.pkg_cmd_remove_prefix = ['pkgin', '-y', 'remove']
-            self.pkg_cmd_update_prefix = ['pkgin', '-y', 'update']
-            self.pkg_cmd_upgrade_prefix = ['pkgin', '-y', 'full-upgrade']
+            self.pkg_cmd_install_prefix = ["pkgin", "-y", "install"]
+            self.pkg_cmd_remove_prefix = ["pkgin", "-y", "remove"]
+            self.pkg_cmd_update_prefix = ["pkgin", "-y", "update"]
+            self.pkg_cmd_upgrade_prefix = ["pkgin", "-y", "full-upgrade"]
         else:
-            self.pkg_cmd_install_prefix = ['pkg_add', '-U']
-            self.pkg_cmd_remove_prefix = ['pkg_delete']
+            self.pkg_cmd_install_prefix = ["pkg_add", "-U"]
+            self.pkg_cmd_remove_prefix = ["pkg_delete"]
 
     def _get_add_member_to_group_cmd(self, member_name, group_name):
-        return ['usermod', '-G', group_name, member_name]
+        return ["usermod", "-G", group_name, member_name]
 
     def add_user(self, name, **kwargs):
         if util.is_user(name):
             LOG.info("User %s already exists, skipping.", name)
             return False
 
-        adduser_cmd = ['useradd']
-        log_adduser_cmd = ['useradd']
+        adduser_cmd = ["useradd"]
+        log_adduser_cmd = ["useradd"]
 
         adduser_opts = {
-            "homedir": '-d',
-            "gecos": '-c',
-            "primary_group": '-g',
-            "groups": '-G',
-            "shell": '-s',
+            "homedir": "-d",
+            "gecos": "-c",
+            "primary_group": "-g",
+            "groups": "-G",
+            "shell": "-s",
         }
         adduser_flags = {
-            "no_user_group": '--no-user-group',
-            "system": '--system',
-            "no_log_init": '--no-log-init',
+            "no_user_group": "--no-user-group",
+            "system": "--system",
+            "no_log_init": "--no-log-init",
         }
 
         for key, val in kwargs.items():
@@ -67,9 +66,9 @@ class NetBSD(cloudinit.distros.bsd.BSD):
                 adduser_cmd.append(adduser_flags[key])
                 log_adduser_cmd.append(adduser_flags[key])
 
-        if 'no_create_home' not in kwargs or 'system' not in kwargs:
-            adduser_cmd += ['-m']
-            log_adduser_cmd += ['-m']
+        if "no_create_home" not in kwargs or "system" not in kwargs:
+            adduser_cmd += ["-m"]
+            log_adduser_cmd += ["-m"]
 
         adduser_cmd += [name]
         log_adduser_cmd += [name]
@@ -83,29 +82,28 @@ class NetBSD(cloudinit.distros.bsd.BSD):
             raise
         # Set the password if it is provided
         # For security consideration, only hashed passwd is assumed
-        passwd_val = kwargs.get('passwd', None)
+        passwd_val = kwargs.get("passwd", None)
         if passwd_val is not None:
             self.set_passwd(name, passwd_val, hashed=True)
 
     def set_passwd(self, user, passwd, hashed=False):
         if hashed:
             hashed_pw = passwd
-        elif not hasattr(crypt, 'METHOD_BLOWFISH'):
+        elif not hasattr(crypt, "METHOD_BLOWFISH"):
             # crypt.METHOD_BLOWFISH comes with Python 3.7 which is available
             # on NetBSD 7 and 8.
-            LOG.error((
-                'Cannot set non-encrypted password for user %s. '
-                'Python >= 3.7 is required.'), user)
+            LOG.error(
+                "Cannot set non-encrypted password for user %s. "
+                "Python >= 3.7 is required.",
+                user,
+            )
             return
         else:
             method = crypt.METHOD_BLOWFISH  # pylint: disable=E1101
-            hashed_pw = crypt.crypt(
-                passwd,
-                crypt.mksalt(method)
-            )
+            hashed_pw = crypt.crypt(passwd, crypt.mksalt(method))
 
         try:
-            subp.subp(['usermod', '-p', hashed_pw, user])
+            subp.subp(["usermod", "-p", hashed_pw, user])
         except Exception:
             util.logexc(LOG, "Failed to set password for %s", user)
             raise
@@ -113,40 +111,42 @@ class NetBSD(cloudinit.distros.bsd.BSD):
 
     def force_passwd_change(self, user):
         try:
-            subp.subp(['usermod', '-F', user])
+            subp.subp(["usermod", "-F", user])
         except Exception:
             util.logexc(LOG, "Failed to set pw expiration for %s", user)
             raise
 
     def lock_passwd(self, name):
         try:
-            subp.subp(['usermod', '-C', 'yes', name])
+            subp.subp(["usermod", "-C", "yes", name])
         except Exception:
             util.logexc(LOG, "Failed to lock user %s", name)
             raise
 
     def unlock_passwd(self, name):
         try:
-            subp.subp(['usermod', '-C', 'no', name])
+            subp.subp(["usermod", "-C", "no", name])
         except Exception:
             util.logexc(LOG, "Failed to unlock user %s", name)
             raise
 
     def apply_locale(self, locale, out_fn=None):
-        LOG.debug('Cannot set the locale.')
+        LOG.debug("Cannot set the locale.")
 
     def apply_network_config_names(self, netconfig):
-        LOG.debug('NetBSD cannot rename network interface.')
+        LOG.debug("NetBSD cannot rename network interface.")
 
     def _get_pkg_cmd_environ(self):
         """Return env vars used in NetBSD package_command operations"""
         os_release = platform.release()
         os_arch = platform.machine()
         e = os.environ.copy()
-        e['PKG_PATH'] = (
-            'http://cdn.netbsd.org/pub/pkgsrc/'
-            'packages/NetBSD/%s/%s/All'
-        ) % (os_arch, os_release)
+        e[
+            "PKG_PATH"
+        ] = "http://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/%s/%s/All" % (
+            os_arch,
+            os_release,
+        )
         return e
 
     def update_package_sources(self):
@@ -156,4 +156,5 @@ class NetBSD(cloudinit.distros.bsd.BSD):
 class Distro(NetBSD):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/networking.py b/cloudinit/distros/networking.py
index c291196a..e18a48ca 100644
--- a/cloudinit/distros/networking.py
+++ b/cloudinit/distros/networking.py
@@ -2,9 +2,7 @@ import abc
 import logging
 import os
 
-from cloudinit import subp
-from cloudinit import net, util
-
+from cloudinit import net, subp, util
 
 LOG = logging.getLogger(__name__)
 
@@ -73,7 +71,8 @@ class Networking(metaclass=abc.ABCMeta):
 
     def get_interfaces_by_mac(self) -> dict:
         return net.get_interfaces_by_mac(
-            blacklist_drivers=self.blacklist_drivers)
+            blacklist_drivers=self.blacklist_drivers
+        )
 
     def get_master(self, devname: DeviceName):
         return net.get_master(devname)
@@ -225,7 +224,7 @@ class LinuxNetworking(Networking):
 
     def try_set_link_up(self, devname: DeviceName) -> bool:
         """Try setting the link to up explicitly and return if it is up.
-           Not guaranteed to bring the interface up. The caller is expected to
-           add wait times before retrying."""
-        subp.subp(['ip', 'link', 'set', devname, 'up'])
+        Not guaranteed to bring the interface up. The caller is expected to
+        add wait times before retrying."""
+        subp.subp(["ip", "link", "set", devname, "up"])
         return self.is_up(devname)
diff --git a/cloudinit/distros/openEuler.py b/cloudinit/distros/openEuler.py
index edb3165d..3dc0a342 100644
--- a/cloudinit/distros/openEuler.py
+++ b/cloudinit/distros/openEuler.py
@@ -6,4 +6,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/openbsd.py b/cloudinit/distros/openbsd.py
index 720c9cf3..ccdb8799 100644
--- a/cloudinit/distros/openbsd.py
+++ b/cloudinit/distros/openbsd.py
@@ -7,28 +7,27 @@ import platform
 
 import cloudinit.distros.netbsd
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
 
 class Distro(cloudinit.distros.netbsd.NetBSD):
-    hostname_conf_fn = '/etc/myname'
+    hostname_conf_fn = "/etc/myname"
 
     def _read_hostname(self, filename, default=None):
         return util.load_file(self.hostname_conf_fn)
 
     def _write_hostname(self, hostname, filename):
-        content = hostname + '\n'
+        content = hostname + "\n"
         util.write_file(self.hostname_conf_fn, content)
 
     def _get_add_member_to_group_cmd(self, member_name, group_name):
-        return ['usermod', '-G', group_name, member_name]
+        return ["usermod", "-G", group_name, member_name]
 
     def lock_passwd(self, name):
         try:
-            subp.subp(['usermod', '-p', '*', name])
+            subp.subp(["usermod", "-p", "*", name])
         except Exception:
             util.logexc(LOG, "Failed to lock user %s", name)
             raise
@@ -41,11 +40,10 @@ class Distro(cloudinit.distros.netbsd.NetBSD):
         os_release = platform.release()
         os_arch = platform.machine()
         e = os.environ.copy()
-        e['PKG_PATH'] = (
-            'ftp://ftp.openbsd.org/pub/OpenBSD/{os_release}/'
-            'packages/{os_arch}/').format(
-            os_arch=os_arch, os_release=os_release
-        )
+        e["PKG_PATH"] = (
+            "ftp://ftp.openbsd.org/pub/OpenBSD/{os_release}/"
+            "packages/{os_arch}/"
+        ).format(os_arch=os_arch, os_release=os_release)
         return e
 
 
diff --git a/cloudinit/distros/opensuse.py b/cloudinit/distros/opensuse.py
index 2a7497cc..00ed1514 100644
--- a/cloudinit/distros/opensuse.py
+++ b/cloudinit/distros/opensuse.py
@@ -8,68 +8,61 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import distros
-
-from cloudinit.distros.parsers.hostname import HostnameConf
-
-from cloudinit import helpers
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import distros, helpers, subp, util
 from cloudinit.distros import rhel_util as rhutil
+from cloudinit.distros.parsers.hostname import HostnameConf
 from cloudinit.settings import PER_INSTANCE
 
 
 class Distro(distros.Distro):
-    clock_conf_fn = '/etc/sysconfig/clock'
-    hostname_conf_fn = '/etc/HOSTNAME'
-    init_cmd = ['service']
-    locale_conf_fn = '/etc/sysconfig/language'
-    network_conf_fn = '/etc/sysconfig/network/config'
-    network_script_tpl = '/etc/sysconfig/network/ifcfg-%s'
-    route_conf_tpl = '/etc/sysconfig/network/ifroute-%s'
-    systemd_hostname_conf_fn = '/etc/hostname'
-    systemd_locale_conf_fn = '/etc/locale.conf'
-    tz_local_fn = '/etc/localtime'
+    clock_conf_fn = "/etc/sysconfig/clock"
+    hostname_conf_fn = "/etc/HOSTNAME"
+    init_cmd = ["service"]
+    locale_conf_fn = "/etc/sysconfig/language"
+    network_conf_fn = "/etc/sysconfig/network/config"
+    network_script_tpl = "/etc/sysconfig/network/ifcfg-%s"
+    route_conf_tpl = "/etc/sysconfig/network/ifroute-%s"
+    systemd_hostname_conf_fn = "/etc/hostname"
+    systemd_locale_conf_fn = "/etc/locale.conf"
+    tz_local_fn = "/etc/localtime"
     renderer_configs = {
-        'sysconfig': {
-            'control': 'etc/sysconfig/network/config',
-            'flavor': 'suse',
-            'iface_templates': '%(base)s/network/ifcfg-%(name)s',
-            'netrules_path': (
-                'etc/udev/rules.d/85-persistent-net-cloud-init.rules'),
-            'route_templates': {
-                'ipv4': '%(base)s/network/ifroute-%(name)s',
-                'ipv6': '%(base)s/network/ifroute-%(name)s',
-            }
+        "sysconfig": {
+            "control": "etc/sysconfig/network/config",
+            "flavor": "suse",
+            "iface_templates": "%(base)s/network/ifcfg-%(name)s",
+            "netrules_path": (
+                "etc/udev/rules.d/85-persistent-net-cloud-init.rules"
+            ),
+            "route_templates": {
+                "ipv4": "%(base)s/network/ifroute-%(name)s",
+                "ipv6": "%(base)s/network/ifroute-%(name)s",
+            },
         }
     }
 
     def __init__(self, name, cfg, paths):
         distros.Distro.__init__(self, name, cfg, paths)
         self._runner = helpers.Runners(paths)
-        self.osfamily = 'suse'
-        cfg['ssh_svcname'] = 'sshd'
+        self.osfamily = "suse"
+        cfg["ssh_svcname"] = "sshd"
         if self.uses_systemd():
-            self.init_cmd = ['systemctl']
-            cfg['ssh_svcname'] = 'sshd.service'
+            self.init_cmd = ["systemctl"]
+            cfg["ssh_svcname"] = "sshd.service"
 
     def apply_locale(self, locale, out_fn=None):
         if self.uses_systemd():
             if not out_fn:
                 out_fn = self.systemd_locale_conf_fn
-            locale_cfg = {'LANG': locale}
+            locale_cfg = {"LANG": locale}
         else:
             if not out_fn:
                 out_fn = self.locale_conf_fn
-            locale_cfg = {'RC_LANG': locale}
+            locale_cfg = {"RC_LANG": locale}
         rhutil.update_sysconfig_file(out_fn, locale_cfg)
 
     def install_packages(self, pkglist):
         self.package_command(
-            'install',
-            args='--auto-agree-with-licenses',
-            pkgs=pkglist
+            "install", args="--auto-agree-with-licenses", pkgs=pkglist
         )
 
     def package_command(self, command, args=None, pkgs=None):
@@ -77,11 +70,11 @@ class Distro(distros.Distro):
             pkgs = []
 
         # No user interaction possible, enable non-interactive mode
-        cmd = ['zypper', '--non-interactive']
+        cmd = ["zypper", "--non-interactive"]
 
         # Command is the operation, such as install
-        if command == 'upgrade':
-            command = 'update'
+        if command == "upgrade":
+            command = "update"
         cmd.append(command)
 
         # args are the arguments to the command, not global options
@@ -90,7 +83,7 @@ class Distro(distros.Distro):
         elif args and isinstance(args, list):
             cmd.extend(args)
 
-        pkglist = util.expand_package_list('%s-%s', pkgs)
+        pkglist = util.expand_package_list("%s-%s", pkgs)
         cmd.extend(pkglist)
 
         # Allow the output of this to flow outwards (ie not be captured)
@@ -106,21 +99,25 @@ class Distro(distros.Distro):
         else:
             # Adjust the sysconfig clock zone setting
             clock_cfg = {
-                'TIMEZONE': str(tz),
+                "TIMEZONE": str(tz),
             }
             rhutil.update_sysconfig_file(self.clock_conf_fn, clock_cfg)
             # This ensures that the correct tz will be used for the system
             util.copy(tz_file, self.tz_local_fn)
 
     def update_package_sources(self):
-        self._runner.run("update-sources", self.package_command,
-                         ['refresh'], freq=PER_INSTANCE)
+        self._runner.run(
+            "update-sources",
+            self.package_command,
+            ["refresh"],
+            freq=PER_INSTANCE,
+        )
 
     def _read_hostname(self, filename, default=None):
-        if self.uses_systemd() and filename.endswith('/previous-hostname'):
+        if self.uses_systemd() and filename.endswith("/previous-hostname"):
             return util.load_file(filename).strip()
         elif self.uses_systemd():
-            (out, _err) = subp.subp(['hostname'])
+            (out, _err) = subp.subp(["hostname"])
             if len(out):
                 return out
             else:
@@ -151,10 +148,10 @@ class Distro(distros.Distro):
         return (host_fn, self._read_hostname(host_fn))
 
     def _write_hostname(self, hostname, filename):
-        if self.uses_systemd() and filename.endswith('/previous-hostname'):
+        if self.uses_systemd() and filename.endswith("/previous-hostname"):
             util.write_file(filename, hostname)
         elif self.uses_systemd():
-            subp.subp(['hostnamectl', 'set-hostname', str(hostname)])
+            subp.subp(["hostnamectl", "set-hostname", str(hostname)])
         else:
             conf = None
             try:
@@ -164,7 +161,7 @@ class Distro(distros.Distro):
             except IOError:
                 pass
             if not conf:
-                conf = HostnameConf('')
+                conf = HostnameConf("")
             conf.set_hostname(hostname)
             util.write_file(filename, str(conf), 0o644)
 
@@ -174,22 +171,28 @@ class Distro(distros.Distro):
 
         # Allow distro to determine the preferred ntp client list
         if not self._preferred_ntp_clients:
-            distro_info = util.system_info()['dist']
+            distro_info = util.system_info()["dist"]
             name = distro_info[0]
-            major_ver = int(distro_info[1].split('.')[0])
+            major_ver = int(distro_info[1].split(".")[0])
 
             # This is horribly complicated because of a case of
             # "we do not care if versions should be increasing syndrome"
-            if (
-                (major_ver >= 15 and 'openSUSE' not in name) or
-                (major_ver >= 15 and 'openSUSE' in name and major_ver != 42)
+            if (major_ver >= 15 and "openSUSE" not in name) or (
+                major_ver >= 15 and "openSUSE" in name and major_ver != 42
             ):
-                self._preferred_ntp_clients = ['chrony',
-                                               'systemd-timesyncd', 'ntp']
+                self._preferred_ntp_clients = [
+                    "chrony",
+                    "systemd-timesyncd",
+                    "ntp",
+                ]
             else:
-                self._preferred_ntp_clients = ['ntp',
-                                               'systemd-timesyncd', 'chrony']
+                self._preferred_ntp_clients = [
+                    "ntp",
+                    "systemd-timesyncd",
+                    "chrony",
+                ]
 
         return self._preferred_ntp_clients
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/parsers/__init__.py b/cloudinit/distros/parsers/__init__.py
index 6b5b6dde..5bea2ae1 100644
--- a/cloudinit/distros/parsers/__init__.py
+++ b/cloudinit/distros/parsers/__init__.py
@@ -9,10 +9,11 @@ def chop_comment(text, comment_chars):
     comment_locations = [text.find(c) for c in comment_chars]
     comment_locations = [c for c in comment_locations if c != -1]
     if not comment_locations:
-        return (text, '')
+        return (text, "")
     min_comment = min(comment_locations)
     before_comment = text[0:min_comment]
     comment = text[min_comment:]
     return (before_comment, comment)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/parsers/hostname.py b/cloudinit/distros/parsers/hostname.py
index e74c083c..61674082 100644
--- a/cloudinit/distros/parsers/hostname.py
+++ b/cloudinit/distros/parsers/hostname.py
@@ -23,11 +23,11 @@ class HostnameConf(object):
         self.parse()
         contents = StringIO()
         for (line_type, components) in self._contents:
-            if line_type == 'blank':
+            if line_type == "blank":
                 contents.write("%s\n" % (components[0]))
-            elif line_type == 'all_comment':
+            elif line_type == "all_comment":
                 contents.write("%s\n" % (components[0]))
-            elif line_type == 'hostname':
+            elif line_type == "hostname":
                 (hostname, tail) = components
                 contents.write("%s%s\n" % (hostname, tail))
         # Ensure trailing newline
@@ -40,7 +40,7 @@ class HostnameConf(object):
     def hostname(self):
         self.parse()
         for (line_type, components) in self._contents:
-            if line_type == 'hostname':
+            if line_type == "hostname":
                 return components[0]
         return None
 
@@ -51,28 +51,28 @@ class HostnameConf(object):
         self.parse()
         replaced = False
         for (line_type, components) in self._contents:
-            if line_type == 'hostname':
+            if line_type == "hostname":
                 components[0] = str(your_hostname)
                 replaced = True
         if not replaced:
-            self._contents.append(('hostname', [str(your_hostname), '']))
+            self._contents.append(("hostname", [str(your_hostname), ""]))
 
     def _parse(self, contents):
         entries = []
         hostnames_found = set()
         for line in contents.splitlines():
             if not len(line.strip()):
-                entries.append(('blank', [line]))
+                entries.append(("blank", [line]))
                 continue
-            (head, tail) = chop_comment(line.strip(), '#')
+            (head, tail) = chop_comment(line.strip(), "#")
             if not len(head):
-                entries.append(('all_comment', [line]))
+                entries.append(("all_comment", [line]))
                 continue
-            entries.append(('hostname', [head, tail]))
+            entries.append(("hostname", [head, tail]))
             hostnames_found.add(head)
         if len(hostnames_found) > 1:
-            raise IOError("Multiple hostnames (%s) found!"
-                          % (hostnames_found))
+            raise IOError("Multiple hostnames (%s) found!" % (hostnames_found))
         return entries
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/parsers/hosts.py b/cloudinit/distros/parsers/hosts.py
index 54e4e934..e43880af 100644
--- a/cloudinit/distros/parsers/hosts.py
+++ b/cloudinit/distros/parsers/hosts.py
@@ -25,7 +25,7 @@ class HostsConf(object):
         self.parse()
         options = []
         for (line_type, components) in self._contents:
-            if line_type == 'option':
+            if line_type == "option":
                 (pieces, _tail) = components
                 if len(pieces) and pieces[0] == ip:
                     options.append(pieces[1:])
@@ -35,7 +35,7 @@ class HostsConf(object):
         self.parse()
         n_entries = []
         for (line_type, components) in self._contents:
-            if line_type != 'option':
+            if line_type != "option":
                 n_entries.append((line_type, components))
                 continue
             else:
@@ -48,35 +48,37 @@ class HostsConf(object):
 
     def add_entry(self, ip, canonical_hostname, *aliases):
         self.parse()
-        self._contents.append(('option',
-                              ([ip, canonical_hostname] + list(aliases), '')))
+        self._contents.append(
+            ("option", ([ip, canonical_hostname] + list(aliases), ""))
+        )
 
     def _parse(self, contents):
         entries = []
         for line in contents.splitlines():
             if not len(line.strip()):
-                entries.append(('blank', [line]))
+                entries.append(("blank", [line]))
                 continue
-            (head, tail) = chop_comment(line.strip(), '#')
+            (head, tail) = chop_comment(line.strip(), "#")
             if not len(head):
-                entries.append(('all_comment', [line]))
+                entries.append(("all_comment", [line]))
                 continue
-            entries.append(('option', [head.split(None), tail]))
+            entries.append(("option", [head.split(None), tail]))
         return entries
 
     def __str__(self):
         self.parse()
         contents = StringIO()
         for (line_type, components) in self._contents:
-            if line_type == 'blank':
+            if line_type == "blank":
                 contents.write("%s\n" % (components[0]))
-            elif line_type == 'all_comment':
+            elif line_type == "all_comment":
                 contents.write("%s\n" % (components[0]))
-            elif line_type == 'option':
+            elif line_type == "option":
                 (pieces, tail) = components
                 pieces = [str(p) for p in pieces]
                 pieces = "\t".join(pieces)
                 contents.write("%s%s\n" % (pieces, tail))
         return contents.getvalue()
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/parsers/networkmanager_conf.py b/cloudinit/distros/parsers/networkmanager_conf.py
index ac51f122..4b669b0f 100644
--- a/cloudinit/distros/parsers/networkmanager_conf.py
+++ b/cloudinit/distros/parsers/networkmanager_conf.py
@@ -13,9 +13,9 @@ import configobj
 
 class NetworkManagerConf(configobj.ConfigObj):
     def __init__(self, contents):
-        configobj.ConfigObj.__init__(self, contents,
-                                     interpolation=False,
-                                     write_empty_values=False)
+        configobj.ConfigObj.__init__(
+            self, contents, interpolation=False, write_empty_values=False
+        )
 
     def set_section_keypair(self, section_name, key, value):
         if section_name not in self.sections:
diff --git a/cloudinit/distros/parsers/resolv_conf.py b/cloudinit/distros/parsers/resolv_conf.py
index 62929d03..0ef4e147 100644
--- a/cloudinit/distros/parsers/resolv_conf.py
+++ b/cloudinit/distros/parsers/resolv_conf.py
@@ -6,9 +6,9 @@
 
 from io import StringIO
 
-from cloudinit.distros.parsers import chop_comment
 from cloudinit import log as logging
 from cloudinit import util
+from cloudinit.distros.parsers import chop_comment
 
 LOG = logging.getLogger(__name__)
 
@@ -26,12 +26,12 @@ class ResolvConf(object):
     @property
     def nameservers(self):
         self.parse()
-        return self._retr_option('nameserver')
+        return self._retr_option("nameserver")
 
     @property
     def local_domain(self):
         self.parse()
-        dm = self._retr_option('domain')
+        dm = self._retr_option("domain")
         if dm:
             return dm[0]
         return None
@@ -39,7 +39,7 @@ class ResolvConf(object):
     @property
     def search_domains(self):
         self.parse()
-        current_sds = self._retr_option('search')
+        current_sds = self._retr_option("search")
         flat_sds = []
         for sdlist in current_sds:
             for sd in sdlist.split(None):
@@ -51,11 +51,11 @@ class ResolvConf(object):
         self.parse()
         contents = StringIO()
         for (line_type, components) in self._contents:
-            if line_type == 'blank':
+            if line_type == "blank":
                 contents.write("\n")
-            elif line_type == 'all_comment':
+            elif line_type == "all_comment":
                 contents.write("%s\n" % (components[0]))
-            elif line_type == 'option':
+            elif line_type == "option":
                 (cfg_opt, cfg_value, comment_tail) = components
                 line = "%s %s" % (cfg_opt, cfg_value)
                 if len(comment_tail):
@@ -66,7 +66,7 @@ class ResolvConf(object):
     def _retr_option(self, opt_name):
         found = []
         for (line_type, components) in self._contents:
-            if line_type == 'option':
+            if line_type == "option":
                 (cfg_opt, cfg_value, _comment_tail) = components
                 if cfg_opt == opt_name:
                     found.append(cfg_value)
@@ -74,27 +74,29 @@ class ResolvConf(object):
 
     def add_nameserver(self, ns):
         self.parse()
-        current_ns = self._retr_option('nameserver')
+        current_ns = self._retr_option("nameserver")
         new_ns = list(current_ns)
         new_ns.append(str(ns))
         new_ns = util.uniq_list(new_ns)
         if len(new_ns) == len(current_ns):
             return current_ns
         if len(current_ns) >= 3:
-            LOG.warning("ignoring nameserver %r: adding would "
-                        "exceed the maximum of "
-                        "'3' name servers (see resolv.conf(5))", ns)
+            LOG.warning(
+                "ignoring nameserver %r: adding would "
+                "exceed the maximum of "
+                "'3' name servers (see resolv.conf(5))",
+                ns,
+            )
             return current_ns[:3]
-        self._remove_option('nameserver')
+        self._remove_option("nameserver")
         for n in new_ns:
-            self._contents.append(('option', ['nameserver', n, '']))
+            self._contents.append(("option", ["nameserver", n, ""]))
         return new_ns
 
     def _remove_option(self, opt_name):
-
         def remove_opt(item):
             line_type, components = item
-            if line_type != 'option':
+            if line_type != "option":
                 return False
             (cfg_opt, _cfg_value, _comment_tail) = components
             if cfg_opt != opt_name:
@@ -116,23 +118,26 @@ class ResolvConf(object):
             return new_sds
         if len(flat_sds) >= 6:
             # Hard restriction on only 6 search domains
-            raise ValueError(("Adding %r would go beyond the "
-                              "'6' maximum search domains") % (search_domain))
+            raise ValueError(
+                "Adding %r would go beyond the '6' maximum search domains"
+                % (search_domain)
+            )
         s_list = " ".join(new_sds)
         if len(s_list) > 256:
             # Some hard limit on 256 chars total
-            raise ValueError(("Adding %r would go beyond the "
-                              "256 maximum search list character limit")
-                             % (search_domain))
-        self._remove_option('search')
-        self._contents.append(('option', ['search', s_list, '']))
+            raise ValueError(
+                "Adding %r would go beyond the "
+                "256 maximum search list character limit" % (search_domain)
+            )
+        self._remove_option("search")
+        self._contents.append(("option", ["search", s_list, ""]))
         return flat_sds
 
     @local_domain.setter
     def local_domain(self, domain):
         self.parse()
-        self._remove_option('domain')
-        self._contents.append(('option', ['domain', str(domain), '']))
+        self._remove_option("domain")
+        self._contents.append(("option", ["domain", str(domain), ""]))
         return domain
 
     def _parse(self, contents):
@@ -140,24 +145,30 @@ class ResolvConf(object):
         for (i, line) in enumerate(contents.splitlines()):
             sline = line.strip()
             if not sline:
-                entries.append(('blank', [line]))
+                entries.append(("blank", [line]))
                 continue
-            (head, tail) = chop_comment(line, ';#')
+            (head, tail) = chop_comment(line, ";#")
             if not len(head.strip()):
-                entries.append(('all_comment', [line]))
+                entries.append(("all_comment", [line]))
                 continue
             if not tail:
-                tail = ''
+                tail = ""
             try:
                 (cfg_opt, cfg_values) = head.split(None, 1)
             except (IndexError, ValueError) as e:
                 raise IOError(
                     "Incorrectly formatted resolv.conf line %s" % (i + 1)
                 ) from e
-            if cfg_opt not in ['nameserver', 'domain',
-                               'search', 'sortlist', 'options']:
+            if cfg_opt not in [
+                "nameserver",
+                "domain",
+                "search",
+                "sortlist",
+                "options",
+            ]:
                 raise IOError("Unexpected resolv.conf option %s" % (cfg_opt))
             entries.append(("option", [cfg_opt, cfg_values, tail]))
         return entries
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/parsers/sys_conf.py b/cloudinit/distros/parsers/sys_conf.py
index dee4c551..4132734c 100644
--- a/cloudinit/distros/parsers/sys_conf.py
+++ b/cloudinit/distros/parsers/sys_conf.py
@@ -20,7 +20,7 @@ import configobj
 # See: http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html
 # or look at the 'param_expand()' function in the subst.c file in the bash
 # source tarball...
-SHELL_VAR_RULE = r'[a-zA-Z_]+[a-zA-Z0-9_]*'
+SHELL_VAR_RULE = r"[a-zA-Z_]+[a-zA-Z0-9_]*"
 SHELL_VAR_REGEXES = [
     # Basic variables
     re.compile(r"\$" + SHELL_VAR_RULE),
@@ -48,10 +48,11 @@ class SysConf(configobj.ConfigObj):
         ``configobj.ConfigObj.__init__`` (i.e. "a filename, file like object,
         or list of lines").
     """
+
     def __init__(self, contents):
-        configobj.ConfigObj.__init__(self, contents,
-                                     interpolation=False,
-                                     write_empty_values=True)
+        configobj.ConfigObj.__init__(
+            self, contents, interpolation=False, write_empty_values=True
+        )
 
     def __str__(self):
         contents = self.write()
@@ -66,11 +67,13 @@ class SysConf(configobj.ConfigObj):
         if not isinstance(value, str):
             raise ValueError('Value "%s" is not a string' % (value))
         if len(value) == 0:
-            return ''
+            return ""
         quot_func = None
         if value[0] in ['"', "'"] and value[-1] in ['"', "'"]:
             if len(value) == 1:
-                quot_func = (lambda x: self._get_single_quote(x) % x)
+                quot_func = (
+                    lambda x: self._get_single_quote(x) % x
+                )  # noqa: E731
         else:
             # Quote whitespace if it isn't the start + end of a shell command
             if value.strip().startswith("$(") and value.strip().endswith(")"):
@@ -82,11 +85,13 @@ class SysConf(configobj.ConfigObj):
                         # leave it alone since the pipes.quote function likes
                         # to use single quotes which won't get expanded...
                         if re.search(r"[\n\"']", value):
-                            quot_func = (lambda x:
-                                         self._get_triple_quote(x) % x)
+                            quot_func = (
+                                lambda x: self._get_triple_quote(x) % x
+                            )  # noqa: E731
                         else:
-                            quot_func = (lambda x:
-                                         self._get_single_quote(x) % x)
+                            quot_func = (
+                                lambda x: self._get_single_quote(x) % x
+                            )  # noqa: E731
                     else:
                         quot_func = pipes.quote
         if not quot_func:
@@ -99,10 +104,13 @@ class SysConf(configobj.ConfigObj):
         val = self._decode_element(self._quote(this_entry))
         key = self._decode_element(self._quote(entry))
         cmnt = self._decode_element(comment)
-        return '%s%s%s%s%s' % (indent_string,
-                               key,
-                               self._a_to_u('='),
-                               val,
-                               cmnt)
+        return "%s%s%s%s%s" % (
+            indent_string,
+            key,
+            self._a_to_u("="),
+            val,
+            cmnt,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/photon.py b/cloudinit/distros/photon.py
index 4ff90ea6..14cefe90 100644
--- a/cloudinit/distros/photon.py
+++ b/cloudinit/distros/photon.py
@@ -5,28 +5,25 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import net
-from cloudinit import util
-from cloudinit import subp
-from cloudinit import distros
-from cloudinit import helpers
+from cloudinit import distros, helpers
 from cloudinit import log as logging
-from cloudinit.settings import PER_INSTANCE
+from cloudinit import net, subp, util
 from cloudinit.distros import rhel_util as rhutil
+from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
 
 class Distro(distros.Distro):
-    systemd_hostname_conf_fn = '/etc/hostname'
-    network_conf_dir = '/etc/systemd/network/'
-    systemd_locale_conf_fn = '/etc/locale.conf'
-    resolve_conf_fn = '/etc/systemd/resolved.conf'
+    systemd_hostname_conf_fn = "/etc/hostname"
+    network_conf_dir = "/etc/systemd/network/"
+    systemd_locale_conf_fn = "/etc/locale.conf"
+    resolve_conf_fn = "/etc/systemd/resolved.conf"
 
     renderer_configs = {
-        'networkd': {
-            'resolv_conf_fn': resolve_conf_fn,
-            'network_conf_dir': network_conf_dir,
+        "networkd": {
+            "resolv_conf_fn": resolve_conf_fn,
+            "network_conf_dir": network_conf_dir,
         }
     }
 
@@ -39,33 +36,34 @@ class Distro(distros.Distro):
         # calls from repeatly happening (when they
         # should only happen say once per instance...)
         self._runner = helpers.Runners(paths)
-        self.osfamily = 'photon'
-        self.init_cmd = ['systemctl']
+        self.osfamily = "photon"
+        self.init_cmd = ["systemctl"]
 
     def exec_cmd(self, cmd, capture=True):
-        LOG.debug('Attempting to run: %s', cmd)
+        LOG.debug("Attempting to run: %s", cmd)
         try:
             (out, err) = subp.subp(cmd, capture=capture)
             if err:
-                LOG.warning('Running %s resulted in stderr output: %s',
-                            cmd, err)
+                LOG.warning(
+                    "Running %s resulted in stderr output: %s", cmd, err
+                )
                 return True, out, err
             return False, out, err
         except subp.ProcessExecutionError:
-            util.logexc(LOG, 'Command %s failed', cmd)
+            util.logexc(LOG, "Command %s failed", cmd)
             return True, None, None
 
     def generate_fallback_config(self):
-        key = 'disable_fallback_netcfg'
+        key = "disable_fallback_netcfg"
         disable_fallback_netcfg = self._cfg.get(key, True)
-        LOG.debug('%s value is: %s', key, disable_fallback_netcfg)
+        LOG.debug("%s value is: %s", key, disable_fallback_netcfg)
 
         if not disable_fallback_netcfg:
             return net.generate_fallback_config()
 
         LOG.info(
-            'Skipping generate_fallback_config. Rely on PhotonOS default '
-            'network config'
+            "Skipping generate_fallback_config. Rely on PhotonOS default "
+            "network config"
         )
         return None
 
@@ -76,7 +74,7 @@ class Distro(distros.Distro):
             out_fn = self.systemd_locale_conf_fn
 
         locale_cfg = {
-            'LANG': locale,
+            "LANG": locale,
         }
 
         rhutil.update_sysconfig_file(out_fn, locale_cfg)
@@ -84,36 +82,42 @@ class Distro(distros.Distro):
         # rhutil will modify /etc/locale.conf
         # For locale change to take effect, reboot is needed or we can restart
         # systemd-localed. This is equivalent of localectl
-        cmd = ['systemctl', 'restart', 'systemd-localed']
+        cmd = ["systemctl", "restart", "systemd-localed"]
         self.exec_cmd(cmd)
 
     def install_packages(self, pkglist):
         # self.update_package_sources()
-        self.package_command('install', pkgs=pkglist)
+        self.package_command("install", pkgs=pkglist)
 
     def _write_hostname(self, hostname, filename):
-        if filename and filename.endswith('/previous-hostname'):
+        if filename and filename.endswith("/previous-hostname"):
             util.write_file(filename, hostname)
         else:
-            ret, _out, err = self.exec_cmd(['hostnamectl', 'set-hostname',
-                                            str(hostname)])
+            ret, _out, err = self.exec_cmd(
+                ["hostnamectl", "set-hostname", str(hostname)]
+            )
             if ret:
-                LOG.warning(('Error while setting hostname: %s\n'
-                             'Given hostname: %s', err, hostname))
+                LOG.warning(
+                    (
+                        "Error while setting hostname: %s\nGiven hostname: %s",
+                        err,
+                        hostname,
+                    )
+                )
 
     def _read_system_hostname(self):
         sys_hostname = self._read_hostname(self.systemd_hostname_conf_fn)
         return (self.systemd_hostname_conf_fn, sys_hostname)
 
     def _read_hostname(self, filename, default=None):
-        if filename and filename.endswith('/previous-hostname'):
+        if filename and filename.endswith("/previous-hostname"):
             return util.load_file(filename).strip()
 
-        _ret, out, _err = self.exec_cmd(['hostname', '-f'])
+        _ret, out, _err = self.exec_cmd(["hostname", "-f"])
         return out.strip() if out else default
 
     def _get_localhost_ip(self):
-        return '127.0.1.1'
+        return "127.0.1.1"
 
     def set_timezone(self, tz):
         distros.set_etc_timezone(tz=tz, tz_file=self._find_tz_file(tz))
@@ -122,7 +126,7 @@ class Distro(distros.Distro):
         if not pkgs:
             pkgs = []
 
-        cmd = ['tdnf', '-y']
+        cmd = ["tdnf", "-y"]
         if args and isinstance(args, str):
             cmd.append(args)
         elif args and isinstance(args, list):
@@ -130,13 +134,17 @@ class Distro(distros.Distro):
 
         cmd.append(command)
 
-        pkglist = util.expand_package_list('%s-%s', pkgs)
+        pkglist = util.expand_package_list("%s-%s", pkgs)
         cmd.extend(pkglist)
 
         ret, _out, err = self.exec_cmd(cmd)
         if ret:
-            LOG.error('Error while installing packages: %s', err)
+            LOG.error("Error while installing packages: %s", err)
 
     def update_package_sources(self):
-        self._runner.run('update-sources', self.package_command,
-                         ['makecache'], freq=PER_INSTANCE)
+        self._runner.run(
+            "update-sources",
+            self.package_command,
+            ["makecache"],
+            freq=PER_INSTANCE,
+        )
diff --git a/cloudinit/distros/rhel.py b/cloudinit/distros/rhel.py
index c9ee2747..84744ece 100644
--- a/cloudinit/distros/rhel.py
+++ b/cloudinit/distros/rhel.py
@@ -8,12 +8,9 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import distros
-from cloudinit import helpers
+from cloudinit import distros, helpers
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import subp, util
 from cloudinit.distros import rhel_util
 from cloudinit.settings import PER_INSTANCE
 
@@ -22,30 +19,30 @@ LOG = logging.getLogger(__name__)
 
 def _make_sysconfig_bool(val):
     if val:
-        return 'yes'
+        return "yes"
     else:
-        return 'no'
+        return "no"
 
 
 class Distro(distros.Distro):
     # See: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Network_Configuration_Using_sysconfig_Files.html # noqa
     clock_conf_fn = "/etc/sysconfig/clock"
-    locale_conf_fn = '/etc/sysconfig/i18n'
-    systemd_locale_conf_fn = '/etc/locale.conf'
+    locale_conf_fn = "/etc/sysconfig/i18n"
+    systemd_locale_conf_fn = "/etc/locale.conf"
     network_conf_fn = "/etc/sysconfig/network"
     hostname_conf_fn = "/etc/sysconfig/network"
     systemd_hostname_conf_fn = "/etc/hostname"
-    network_script_tpl = '/etc/sysconfig/network-scripts/ifcfg-%s'
+    network_script_tpl = "/etc/sysconfig/network-scripts/ifcfg-%s"
     tz_local_fn = "/etc/localtime"
     usr_lib_exec = "/usr/libexec"
     renderer_configs = {
-        'sysconfig': {
-            'control': 'etc/sysconfig/network',
-            'iface_templates': '%(base)s/network-scripts/ifcfg-%(name)s',
-            'route_templates': {
-                'ipv4': '%(base)s/network-scripts/route-%(name)s',
-                'ipv6': '%(base)s/network-scripts/route6-%(name)s'
-            }
+        "sysconfig": {
+            "control": "etc/sysconfig/network",
+            "iface_templates": "%(base)s/network-scripts/ifcfg-%(name)s",
+            "route_templates": {
+                "ipv4": "%(base)s/network-scripts/route-%(name)s",
+                "ipv6": "%(base)s/network-scripts/route6-%(name)s",
+            },
         }
     }
 
@@ -59,11 +56,11 @@ class Distro(distros.Distro):
         # calls from repeatly happening (when they
         # should only happen say once per instance...)
         self._runner = helpers.Runners(paths)
-        self.osfamily = 'redhat'
-        cfg['ssh_svcname'] = 'sshd'
+        self.osfamily = "redhat"
+        cfg["ssh_svcname"] = "sshd"
 
     def install_packages(self, pkglist):
-        self.package_command('install', pkgs=pkglist)
+        self.package_command("install", pkgs=pkglist)
 
     def apply_locale(self, locale, out_fn=None):
         if self.uses_systemd():
@@ -74,20 +71,20 @@ class Distro(distros.Distro):
             if not out_fn:
                 out_fn = self.locale_conf_fn
         locale_cfg = {
-            'LANG': locale,
+            "LANG": locale,
         }
         rhel_util.update_sysconfig_file(out_fn, locale_cfg)
 
     def _write_hostname(self, hostname, filename):
         # systemd will never update previous-hostname for us, so
         # we need to do it ourselves
-        if self.uses_systemd() and filename.endswith('/previous-hostname'):
+        if self.uses_systemd() and filename.endswith("/previous-hostname"):
             util.write_file(filename, hostname)
         elif self.uses_systemd():
-            subp.subp(['hostnamectl', 'set-hostname', str(hostname)])
+            subp.subp(["hostnamectl", "set-hostname", str(hostname)])
         else:
             host_cfg = {
-                'HOSTNAME': hostname,
+                "HOSTNAME": hostname,
             }
             rhel_util.update_sysconfig_file(filename, host_cfg)
 
@@ -99,18 +96,18 @@ class Distro(distros.Distro):
         return (host_fn, self._read_hostname(host_fn))
 
     def _read_hostname(self, filename, default=None):
-        if self.uses_systemd() and filename.endswith('/previous-hostname'):
+        if self.uses_systemd() and filename.endswith("/previous-hostname"):
             return util.load_file(filename).strip()
         elif self.uses_systemd():
-            (out, _err) = subp.subp(['hostname'])
+            (out, _err) = subp.subp(["hostname"])
             if len(out):
                 return out
             else:
                 return default
         else:
             (_exists, contents) = rhel_util.read_sysconfig_file(filename)
-            if 'HOSTNAME' in contents:
-                return contents['HOSTNAME']
+            if "HOSTNAME" in contents:
+                return contents["HOSTNAME"]
             else:
                 return default
 
@@ -124,7 +121,7 @@ class Distro(distros.Distro):
         else:
             # Adjust the sysconfig clock zone setting
             clock_cfg = {
-                'ZONE': str(tz),
+                "ZONE": str(tz),
             }
             rhel_util.update_sysconfig_file(self.clock_conf_fn, clock_cfg)
             # This ensures that the correct tz will be used for the system
@@ -134,18 +131,18 @@ class Distro(distros.Distro):
         if pkgs is None:
             pkgs = []
 
-        if subp.which('dnf'):
-            LOG.debug('Using DNF for package management')
-            cmd = ['dnf']
+        if subp.which("dnf"):
+            LOG.debug("Using DNF for package management")
+            cmd = ["dnf"]
         else:
-            LOG.debug('Using YUM for package management')
+            LOG.debug("Using YUM for package management")
             # the '-t' argument makes yum tolerant of errors on the command
             # line with regard to packages.
             #
             # For example: if you request to install foo, bar and baz and baz
             # is installed; yum won't error out complaining that baz is already
             # installed.
-            cmd = ['yum', '-t']
+            cmd = ["yum", "-t"]
         # Determines whether or not yum prompts for confirmation
         # of critical actions. We don't want to prompt...
         cmd.append("-y")
@@ -157,14 +154,19 @@ class Distro(distros.Distro):
 
         cmd.append(command)
 
-        pkglist = util.expand_package_list('%s-%s', pkgs)
+        pkglist = util.expand_package_list("%s-%s", pkgs)
         cmd.extend(pkglist)
 
         # Allow the output of this to flow outwards (ie not be captured)
         subp.subp(cmd, capture=False)
 
     def update_package_sources(self):
-        self._runner.run("update-sources", self.package_command,
-                         ["makecache"], freq=PER_INSTANCE)
+        self._runner.run(
+            "update-sources",
+            self.package_command,
+            ["makecache"],
+            freq=PER_INSTANCE,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/rhel_util.py b/cloudinit/distros/rhel_util.py
index d71394b4..c96f93b5 100644
--- a/cloudinit/distros/rhel_util.py
+++ b/cloudinit/distros/rhel_util.py
@@ -8,10 +8,9 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.distros.parsers.sys_conf import SysConf
-
 from cloudinit import log as logging
 from cloudinit import util
+from cloudinit.distros.parsers.sys_conf import SysConf
 
 LOG = logging.getLogger(__name__)
 
@@ -49,4 +48,5 @@ def read_sysconfig_file(fn):
         contents = []
     return (exists, SysConf(contents))
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/rocky.py b/cloudinit/distros/rocky.py
index edb3165d..3dc0a342 100644
--- a/cloudinit/distros/rocky.py
+++ b/cloudinit/distros/rocky.py
@@ -6,4 +6,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/sles.py b/cloudinit/distros/sles.py
index f3bfb9c2..484214e7 100644
--- a/cloudinit/distros/sles.py
+++ b/cloudinit/distros/sles.py
@@ -10,4 +10,5 @@ from cloudinit.distros import opensuse
 class Distro(opensuse.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/ubuntu.py b/cloudinit/distros/ubuntu.py
index 2a1f93d9..ec6470a9 100644
--- a/cloudinit/distros/ubuntu.py
+++ b/cloudinit/distros/ubuntu.py
@@ -9,41 +9,44 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.distros import debian
-from cloudinit.distros import PREFERRED_NTP_CLIENTS
-from cloudinit import util
-
 import copy
 
+from cloudinit import util
+from cloudinit.distros import PREFERRED_NTP_CLIENTS, debian
 
-class Distro(debian.Distro):
 
+class Distro(debian.Distro):
     def __init__(self, name, cfg, paths):
         super(Distro, self).__init__(name, cfg, paths)
         # Ubuntu specific network cfg locations
         self.network_conf_fn = {
             "eni": "/etc/network/interfaces.d/50-cloud-init.cfg",
-            "netplan": "/etc/netplan/50-cloud-init.yaml"
+            "netplan": "/etc/netplan/50-cloud-init.yaml",
         }
         self.renderer_configs = {
-            "eni": {"eni_path": self.network_conf_fn["eni"],
-                    "eni_header": debian.NETWORK_FILE_HEADER},
-            "netplan": {"netplan_path": self.network_conf_fn["netplan"],
-                        "netplan_header": debian.NETWORK_FILE_HEADER,
-                        "postcmds": True}
+            "eni": {
+                "eni_path": self.network_conf_fn["eni"],
+                "eni_header": debian.NETWORK_FILE_HEADER,
+            },
+            "netplan": {
+                "netplan_path": self.network_conf_fn["netplan"],
+                "netplan_header": debian.NETWORK_FILE_HEADER,
+                "postcmds": True,
+            },
         }
 
     @property
     def preferred_ntp_clients(self):
         """The preferred ntp client is dependent on the version."""
         if not self._preferred_ntp_clients:
-            (_name, _version, codename) = util.system_info()['dist']
+            (_name, _version, codename) = util.system_info()["dist"]
             # Xenial cloud-init only installed ntp, UbuntuCore has timesyncd.
             if codename == "xenial" and not util.system_is_snappy():
-                self._preferred_ntp_clients = ['ntp']
+                self._preferred_ntp_clients = ["ntp"]
             else:
-                self._preferred_ntp_clients = (
-                    copy.deepcopy(PREFERRED_NTP_CLIENTS))
+                self._preferred_ntp_clients = copy.deepcopy(
+                    PREFERRED_NTP_CLIENTS
+                )
         return self._preferred_ntp_clients
 
 
diff --git a/cloudinit/distros/ug_util.py b/cloudinit/distros/ug_util.py
index 600b743f..72766392 100755
--- a/cloudinit/distros/ug_util.py
+++ b/cloudinit/distros/ug_util.py
@@ -10,8 +10,7 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 from cloudinit import log as logging
-from cloudinit import type_utils
-from cloudinit import util
+from cloudinit import type_utils, util
 
 LOG = logging.getLogger(__name__)
 
@@ -23,7 +22,7 @@ LOG = logging.getLogger(__name__)
 # standard form used in the rest of cloud-init
 def _normalize_groups(grp_cfg):
     if isinstance(grp_cfg, str):
-        grp_cfg = grp_cfg.strip().split(',')
+        grp_cfg = grp_cfg.strip().split(",")
 
     if isinstance(grp_cfg, list):
         c_grp_cfg = {}
@@ -31,8 +30,10 @@ def _normalize_groups(grp_cfg):
             if isinstance(i, dict):
                 for k, v in i.items():
                     if not isinstance(v, (list, str)):
-                        raise TypeError('Bad group member type %s'
-                                        % (type_utils.obj_name(v)))
+                        raise TypeError(
+                            "Bad group member type %s"
+                            % (type_utils.obj_name(v))
+                        )
 
                     if isinstance(v, list):
                         c_grp_cfg.setdefault(k, []).extend(v)
@@ -42,8 +43,9 @@ def _normalize_groups(grp_cfg):
                 if i not in c_grp_cfg:
                     c_grp_cfg[i] = []
             else:
-                raise TypeError('Unknown group name type %s'
-                                % (type_utils.obj_name(i)))
+                raise TypeError(
+                    "Unknown group name type %s" % (type_utils.obj_name(i))
+                )
         grp_cfg = c_grp_cfg
 
     groups = {}
@@ -51,8 +53,10 @@ def _normalize_groups(grp_cfg):
         for grp_name, grp_members in grp_cfg.items():
             groups[grp_name] = util.uniq_merge_sorted(grp_members)
     else:
-        raise TypeError(('Group config must be list, dict or string type only '
-                         'but found %s') % (type_utils.obj_name(grp_cfg)))
+        raise TypeError(
+            "Group config must be list, dict or string type only but found %s"
+            % (type_utils.obj_name(grp_cfg))
+        )
     return groups
 
 
@@ -73,11 +77,13 @@ def _normalize_users(u_cfg, def_user_cfg=None):
                 if util.is_true(v):
                     ad_ucfg.append(str(k))
             elif isinstance(v, dict):
-                v['name'] = k
+                v["name"] = k
                 ad_ucfg.append(v)
             else:
-                raise TypeError(('Unmappable user value type %s for key %s')
-                                % (type_utils.obj_name(v), k))
+                raise TypeError(
+                    "Unmappable user value type %s for key %s"
+                    % (type_utils.obj_name(v), k)
+                )
         u_cfg = ad_ucfg
     elif isinstance(u_cfg, str):
         u_cfg = util.uniq_merge_sorted(u_cfg)
@@ -89,13 +95,14 @@ def _normalize_users(u_cfg, def_user_cfg=None):
                 if u and u not in users:
                     users[u] = {}
         elif isinstance(user_config, dict):
-            n = user_config.pop('name', 'default')
+            n = user_config.pop("name", "default")
             prev_config = users.get(n) or {}
             users[n] = util.mergemanydict([prev_config, user_config])
         else:
-            raise TypeError(('User config must be dictionary/list or string '
-                             ' types only and not %s')
-                            % (type_utils.obj_name(user_config)))
+            raise TypeError(
+                "User config must be dictionary/list or string "
+                " types only and not %s" % (type_utils.obj_name(user_config))
+            )
 
     # Ensure user options are in the right python friendly format
     if users:
@@ -103,7 +110,7 @@ def _normalize_users(u_cfg, def_user_cfg=None):
         for uname, uconfig in users.items():
             c_uconfig = {}
             for k, v in uconfig.items():
-                k = k.replace('-', '_').strip()
+                k = k.replace("-", "_").strip()
                 if k:
                     c_uconfig[k] = v
             c_users[uname] = c_uconfig
@@ -111,33 +118,34 @@ def _normalize_users(u_cfg, def_user_cfg=None):
 
     # Fix the default user into the actual default user name and replace it.
     def_user = None
-    if users and 'default' in users:
-        def_config = users.pop('default')
+    if users and "default" in users:
+        def_config = users.pop("default")
         if def_user_cfg:
             # Pickup what the default 'real name' is and any groups that are
             # provided by the default config
             def_user_cfg = def_user_cfg.copy()
-            def_user = def_user_cfg.pop('name')
-            def_groups = def_user_cfg.pop('groups', [])
+            def_user = def_user_cfg.pop("name")
+            def_groups = def_user_cfg.pop("groups", [])
             # Pick any config + groups for the user name that we may have
             # extracted previously
             parsed_config = users.pop(def_user, {})
-            parsed_groups = parsed_config.get('groups', [])
+            parsed_groups = parsed_config.get("groups", [])
             # Now merge the extracted groups with the default config provided
             users_groups = util.uniq_merge_sorted(parsed_groups, def_groups)
-            parsed_config['groups'] = ','.join(users_groups)
+            parsed_config["groups"] = ",".join(users_groups)
             # The real config for the default user is the combination of the
             # default user config provided by the distro, the default user
             # config provided by the above merging for the user 'default' and
             # then the parsed config from the user's 'real name' which does not
             # have to be 'default' (but could be)
-            users[def_user] = util.mergemanydict([def_user_cfg, def_config,
-                                                  parsed_config])
+            users[def_user] = util.mergemanydict(
+                [def_user_cfg, def_config, parsed_config]
+            )
 
     # Ensure that only the default user that we found (if any) is actually
     # marked as the default user
     for uname, uconfig in users.items():
-        uconfig['default'] = (uname == def_user if def_user else False)
+        uconfig["default"] = uname == def_user if def_user else False
 
     return users
 
@@ -161,14 +169,17 @@ def normalize_users_groups(cfg, distro):
     # overrides the concept of the default user if provided in the user: XYZ
     # format.
     old_user = {}
-    if 'user' in cfg and cfg['user']:
-        old_user = cfg['user']
+    if "user" in cfg and cfg["user"]:
+        old_user = cfg["user"]
         # Translate it into a format that will be more useful going forward
         if isinstance(old_user, str):
-            old_user = {'name': old_user}
+            old_user = {"name": old_user}
         elif not isinstance(old_user, dict):
-            LOG.warning(("Format for 'user' key must be a string or dictionary"
-                         " and not %s"), type_utils.obj_name(old_user))
+            LOG.warning(
+                "Format for 'user' key must be a string or dictionary"
+                " and not %s",
+                type_utils.obj_name(old_user),
+            )
             old_user = {}
 
     # If no old user format, then assume the distro provides what the 'default'
@@ -179,33 +190,37 @@ def normalize_users_groups(cfg, distro):
     try:
         distro_user_config = distro.get_default_user()
     except NotImplementedError:
-        LOG.warning(('Distro has not implemented default user access. No '
-                     'distribution provided default user will be normalized.'))
+        LOG.warning(
+            "Distro has not implemented default user access. No "
+            "distribution provided default user will be normalized."
+        )
 
     # Merge the old user (which may just be an empty dict when not present)
     # with the distro provided default user configuration so that the old user
     # style picks up all the distribution specific attributes (if any)
     default_user_config = util.mergemanydict([old_user, distro_user_config])
 
-    base_users = cfg.get('users', [])
+    base_users = cfg.get("users", [])
     if not isinstance(base_users, (list, dict, str)):
-        LOG.warning(("Format for 'users' key must be a comma separated string"
-                     " or a dictionary or a list but found %s"),
-                    type_utils.obj_name(base_users))
+        LOG.warning(
+            "Format for 'users' key must be a comma separated string"
+            " or a dictionary or a list but found %s",
+            type_utils.obj_name(base_users),
+        )
         base_users = []
 
     if old_user:
         # When 'user:' is provided, it should be made as the default user
         if isinstance(base_users, list):
-            base_users.append({'name': 'default'})
+            base_users.append({"name": "default"})
         elif isinstance(base_users, dict):
-            base_users['default'] = dict(base_users).get('default', True)
+            base_users["default"] = dict(base_users).get("default", True)
         elif isinstance(base_users, str):
-            base_users += ',default'
+            base_users += ",default"
 
     groups = {}
-    if 'groups' in cfg:
-        groups = _normalize_groups(cfg['groups'])
+    if "groups" in cfg:
+        groups = _normalize_groups(cfg["groups"])
 
     users = _normalize_users(base_users, default_user_config)
     return (users, groups)
@@ -219,9 +234,9 @@ def extract_default(users, default_name=None, default_config=None):
 
     def safe_find(entry):
         config = entry[1]
-        if not config or 'default' not in config:
+        if not config or "default" not in config:
             return False
-        return config['default']
+        return config["default"]
 
     tmp_users = dict(filter(safe_find, users.items()))
     if not tmp_users:
@@ -229,7 +244,8 @@ def extract_default(users, default_name=None, default_config=None):
 
     name = list(tmp_users)[0]
     config = tmp_users[name]
-    config.pop('default', None)
+    config.pop("default", None)
     return (name, config)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/distros/virtuozzo.py b/cloudinit/distros/virtuozzo.py
index edb3165d..3dc0a342 100644
--- a/cloudinit/distros/virtuozzo.py
+++ b/cloudinit/distros/virtuozzo.py
@@ -6,4 +6,5 @@ from cloudinit.distros import rhel
 class Distro(rhel.Distro):
     pass
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/dmi.py b/cloudinit/dmi.py
index bba3daf2..3a999d41 100644
--- a/cloudinit/dmi.py
+++ b/cloudinit/dmi.py
@@ -1,17 +1,17 @@
 # This file is part of cloud-init. See LICENSE file for license information.
+import os
+from collections import namedtuple
+
 from cloudinit import log as logging
 from cloudinit import subp
 from cloudinit.util import is_container, is_FreeBSD
 
-from collections import namedtuple
-import os
-
 LOG = logging.getLogger(__name__)
 
 # Path for DMI Data
 DMI_SYS_PATH = "/sys/class/dmi/id"
 
-kdmi = namedtuple('KernelNames', ['linux', 'freebsd'])
+kdmi = namedtuple("KernelNames", ["linux", "freebsd"])
 kdmi.__new__.defaults__ = (None, None)
 
 # FreeBSD's kenv(1) and Linux /sys/class/dmi/id/* both use different names from
@@ -20,23 +20,23 @@ kdmi.__new__.defaults__ = (None, None)
 # This is our canonical translation table. If we add more tools on other
 # platforms to find dmidecode's values, their keys need to be put in here.
 DMIDECODE_TO_KERNEL = {
-    'baseboard-asset-tag': kdmi('board_asset_tag', 'smbios.planar.tag'),
-    'baseboard-manufacturer': kdmi('board_vendor', 'smbios.planar.maker'),
-    'baseboard-product-name': kdmi('board_name', 'smbios.planar.product'),
-    'baseboard-serial-number': kdmi('board_serial', 'smbios.planar.serial'),
-    'baseboard-version': kdmi('board_version', 'smbios.planar.version'),
-    'bios-release-date': kdmi('bios_date', 'smbios.bios.reldate'),
-    'bios-vendor': kdmi('bios_vendor', 'smbios.bios.vendor'),
-    'bios-version': kdmi('bios_version', 'smbios.bios.version'),
-    'chassis-asset-tag': kdmi('chassis_asset_tag', 'smbios.chassis.tag'),
-    'chassis-manufacturer': kdmi('chassis_vendor', 'smbios.chassis.maker'),
-    'chassis-serial-number': kdmi('chassis_serial', 'smbios.chassis.serial'),
-    'chassis-version': kdmi('chassis_version', 'smbios.chassis.version'),
-    'system-manufacturer': kdmi('sys_vendor', 'smbios.system.maker'),
-    'system-product-name': kdmi('product_name', 'smbios.system.product'),
-    'system-serial-number': kdmi('product_serial', 'smbios.system.serial'),
-    'system-uuid': kdmi('product_uuid', 'smbios.system.uuid'),
-    'system-version': kdmi('product_version', 'smbios.system.version'),
+    "baseboard-asset-tag": kdmi("board_asset_tag", "smbios.planar.tag"),
+    "baseboard-manufacturer": kdmi("board_vendor", "smbios.planar.maker"),
+    "baseboard-product-name": kdmi("board_name", "smbios.planar.product"),
+    "baseboard-serial-number": kdmi("board_serial", "smbios.planar.serial"),
+    "baseboard-version": kdmi("board_version", "smbios.planar.version"),
+    "bios-release-date": kdmi("bios_date", "smbios.bios.reldate"),
+    "bios-vendor": kdmi("bios_vendor", "smbios.bios.vendor"),
+    "bios-version": kdmi("bios_version", "smbios.bios.version"),
+    "chassis-asset-tag": kdmi("chassis_asset_tag", "smbios.chassis.tag"),
+    "chassis-manufacturer": kdmi("chassis_vendor", "smbios.chassis.maker"),
+    "chassis-serial-number": kdmi("chassis_serial", "smbios.chassis.serial"),
+    "chassis-version": kdmi("chassis_version", "smbios.chassis.version"),
+    "system-manufacturer": kdmi("sys_vendor", "smbios.system.maker"),
+    "system-product-name": kdmi("product_name", "smbios.system.product"),
+    "system-serial-number": kdmi("product_serial", "smbios.system.serial"),
+    "system-uuid": kdmi("product_uuid", "smbios.system.uuid"),
+    "system-version": kdmi("product_version", "smbios.system.version"),
 }
 
 
@@ -62,14 +62,18 @@ def _read_dmi_syspath(key):
 
     # uninitialized dmi values show as all \xff and /sys appends a '\n'.
     # in that event, return empty string.
-    if key_data == b'\xff' * (len(key_data) - 1) + b'\n':
+    if key_data == b"\xff" * (len(key_data) - 1) + b"\n":
         key_data = b""
 
     try:
-        return key_data.decode('utf8').strip()
+        return key_data.decode("utf8").strip()
     except UnicodeDecodeError as e:
-        LOG.error("utf-8 decode of content (%s) in %s failed: %s",
-                  dmi_key_path, key_data, e)
+        LOG.error(
+            "utf-8 decode of content (%s) in %s failed: %s",
+            dmi_key_path,
+            key_data,
+            e,
+        )
 
     return None
 
@@ -91,7 +95,7 @@ def _read_kenv(key):
         LOG.debug("kenv returned '%s' for '%s'", result, kmap.freebsd)
         return result
     except subp.ProcessExecutionError as e:
-        LOG.debug('failed kenv cmd: %s\n%s', cmd, e)
+        LOG.debug("failed kenv cmd: %s\n%s", cmd, e)
         return None
 
     return None
@@ -111,7 +115,7 @@ def _call_dmidecode(key, dmidecode_path):
             return ""
         return result
     except subp.ProcessExecutionError as e:
-        LOG.debug('failed dmidecode cmd: %s\n%s', cmd, e)
+        LOG.debug("failed dmidecode cmd: %s\n%s", cmd, e)
         return None
 
 
@@ -144,20 +148,20 @@ def read_dmi_data(key):
         return syspath_value
 
     def is_x86(arch):
-        return (arch == 'x86_64' or (arch[0] == 'i' and arch[2:] == '86'))
+        return arch == "x86_64" or (arch[0] == "i" and arch[2:] == "86")
 
     # running dmidecode can be problematic on some arches (LP: #1243287)
     uname_arch = os.uname()[4]
-    if not (is_x86(uname_arch) or uname_arch in ('aarch64', 'amd64')):
+    if not (is_x86(uname_arch) or uname_arch in ("aarch64", "amd64")):
         LOG.debug("dmidata is not supported on %s", uname_arch)
         return None
 
-    dmidecode_path = subp.which('dmidecode')
+    dmidecode_path = subp.which("dmidecode")
     if dmidecode_path:
         return _call_dmidecode(key, dmidecode_path)
 
-    LOG.debug("did not find either path %s or dmidecode command",
-              DMI_SYS_PATH)
+    LOG.debug("did not find either path %s or dmidecode command", DMI_SYS_PATH)
     return None
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/ec2_utils.py b/cloudinit/ec2_utils.py
index 34acfe84..d4019557 100644
--- a/cloudinit/ec2_utils.py
+++ b/cloudinit/ec2_utils.py
@@ -10,8 +10,7 @@ import functools
 import json
 
 from cloudinit import log as logging
-from cloudinit import url_helper
-from cloudinit import util
+from cloudinit import url_helper, util
 
 LOG = logging.getLogger(__name__)
 SKIP_USERDATA_CODES = frozenset([url_helper.NOT_FOUND])
@@ -30,7 +29,7 @@ class MetadataLeafDecoder(object):
 
     def __call__(self, field, blob):
         if not blob:
-            return ''
+            return ""
         try:
             blob = util.decode_binary(blob)
         except UnicodeDecodeError:
@@ -40,8 +39,11 @@ class MetadataLeafDecoder(object):
                 # Assume it's json, unless it fails parsing...
                 return json.loads(blob)
             except (ValueError, TypeError) as e:
-                LOG.warning("Field %s looked like a json object, but it"
-                            " was not: %s", field, e)
+                LOG.warning(
+                    "Field %s looked like a json object, but it was not: %s",
+                    field,
+                    e,
+                )
         if blob.find("\n") != -1:
             return blob.splitlines()
         return blob
@@ -85,7 +87,7 @@ class MetadataMaterializer(object):
             if not field or not field_name:
                 continue
             # Don't materialize credentials
-            if field_name == 'security-credentials':
+            if field_name == "security-credentials":
                 continue
             if has_children(field):
                 if field_name not in children:
@@ -127,8 +129,7 @@ class MetadataMaterializer(object):
         joined.update(child_contents)
         for field in leaf_contents.keys():
             if field in joined:
-                LOG.warning("Duplicate key found in results from %s",
-                            base_url)
+                LOG.warning("Duplicate key found in results from %s", base_url)
             else:
                 joined[field] = leaf_contents[field]
         return joined
@@ -139,25 +140,36 @@ def skip_retry_on_codes(status_codes, _request_args, cause):
     return cause.code not in status_codes
 
 
-def get_instance_userdata(api_version='latest',
-                          metadata_address='http://169.254.169.254',
-                          ssl_details=None, timeout=5, retries=5,
-                          headers_cb=None, headers_redact=None,
-                          exception_cb=None):
+def get_instance_userdata(
+    api_version="latest",
+    metadata_address="http://169.254.169.254",
+    ssl_details=None,
+    timeout=5,
+    retries=5,
+    headers_cb=None,
+    headers_redact=None,
+    exception_cb=None,
+):
     ud_url = url_helper.combine_url(metadata_address, api_version)
-    ud_url = url_helper.combine_url(ud_url, 'user-data')
-    user_data = ''
+    ud_url = url_helper.combine_url(ud_url, "user-data")
+    user_data = ""
     try:
         if not exception_cb:
             # It is ok for userdata to not exist (thats why we are stopping if
             # NOT_FOUND occurs) and just in that case returning an empty
             # string.
-            exception_cb = functools.partial(skip_retry_on_codes,
-                                             SKIP_USERDATA_CODES)
+            exception_cb = functools.partial(
+                skip_retry_on_codes, SKIP_USERDATA_CODES
+            )
         response = url_helper.read_file_or_url(
-            ud_url, ssl_details=ssl_details, timeout=timeout,
-            retries=retries, exception_cb=exception_cb, headers_cb=headers_cb,
-            headers_redact=headers_redact)
+            ud_url,
+            ssl_details=ssl_details,
+            timeout=timeout,
+            retries=retries,
+            exception_cb=exception_cb,
+            headers_cb=headers_cb,
+            headers_redact=headers_redact,
+        )
         user_data = response.contents
     except url_helper.UrlError as e:
         if e.code not in SKIP_USERDATA_CODES:
@@ -167,27 +179,37 @@ def get_instance_userdata(api_version='latest',
     return user_data
 
 
-def _get_instance_metadata(tree, api_version='latest',
-                           metadata_address='http://169.254.169.254',
-                           ssl_details=None, timeout=5, retries=5,
-                           leaf_decoder=None, headers_cb=None,
-                           headers_redact=None,
-                           exception_cb=None):
+def _get_instance_metadata(
+    tree,
+    api_version="latest",
+    metadata_address="http://169.254.169.254",
+    ssl_details=None,
+    timeout=5,
+    retries=5,
+    leaf_decoder=None,
+    headers_cb=None,
+    headers_redact=None,
+    exception_cb=None,
+):
     md_url = url_helper.combine_url(metadata_address, api_version, tree)
     caller = functools.partial(
-        url_helper.read_file_or_url, ssl_details=ssl_details,
-        timeout=timeout, retries=retries, headers_cb=headers_cb,
+        url_helper.read_file_or_url,
+        ssl_details=ssl_details,
+        timeout=timeout,
+        retries=retries,
+        headers_cb=headers_cb,
         headers_redact=headers_redact,
-        exception_cb=exception_cb)
+        exception_cb=exception_cb,
+    )
 
     def mcaller(url):
         return caller(url).contents
 
     try:
         response = caller(md_url)
-        materializer = MetadataMaterializer(response.contents,
-                                            md_url, mcaller,
-                                            leaf_decoder=leaf_decoder)
+        materializer = MetadataMaterializer(
+            response.contents, md_url, mcaller, leaf_decoder=leaf_decoder
+        )
         md = materializer.materialize()
         if not isinstance(md, (dict)):
             md = {}
@@ -197,35 +219,56 @@ def _get_instance_metadata(tree, api_version='latest',
         return {}
 
 
-def get_instance_metadata(api_version='latest',
-                          metadata_address='http://169.254.169.254',
-                          ssl_details=None, timeout=5, retries=5,
-                          leaf_decoder=None, headers_cb=None,
-                          headers_redact=None,
-                          exception_cb=None):
+def get_instance_metadata(
+    api_version="latest",
+    metadata_address="http://169.254.169.254",
+    ssl_details=None,
+    timeout=5,
+    retries=5,
+    leaf_decoder=None,
+    headers_cb=None,
+    headers_redact=None,
+    exception_cb=None,
+):
     # Note, 'meta-data' explicitly has trailing /.
     # this is required for CloudStack (LP: #1356855)
-    return _get_instance_metadata(tree='meta-data/', api_version=api_version,
-                                  metadata_address=metadata_address,
-                                  ssl_details=ssl_details, timeout=timeout,
-                                  retries=retries, leaf_decoder=leaf_decoder,
-                                  headers_redact=headers_redact,
-                                  headers_cb=headers_cb,
-                                  exception_cb=exception_cb)
-
-
-def get_instance_identity(api_version='latest',
-                          metadata_address='http://169.254.169.254',
-                          ssl_details=None, timeout=5, retries=5,
-                          leaf_decoder=None, headers_cb=None,
-                          headers_redact=None,
-                          exception_cb=None):
-    return _get_instance_metadata(tree='dynamic/instance-identity',
-                                  api_version=api_version,
-                                  metadata_address=metadata_address,
-                                  ssl_details=ssl_details, timeout=timeout,
-                                  retries=retries, leaf_decoder=leaf_decoder,
-                                  headers_redact=headers_redact,
-                                  headers_cb=headers_cb,
-                                  exception_cb=exception_cb)
+    return _get_instance_metadata(
+        tree="meta-data/",
+        api_version=api_version,
+        metadata_address=metadata_address,
+        ssl_details=ssl_details,
+        timeout=timeout,
+        retries=retries,
+        leaf_decoder=leaf_decoder,
+        headers_redact=headers_redact,
+        headers_cb=headers_cb,
+        exception_cb=exception_cb,
+    )
+
+
+def get_instance_identity(
+    api_version="latest",
+    metadata_address="http://169.254.169.254",
+    ssl_details=None,
+    timeout=5,
+    retries=5,
+    leaf_decoder=None,
+    headers_cb=None,
+    headers_redact=None,
+    exception_cb=None,
+):
+    return _get_instance_metadata(
+        tree="dynamic/instance-identity",
+        api_version=api_version,
+        metadata_address=metadata_address,
+        ssl_details=ssl_details,
+        timeout=timeout,
+        retries=retries,
+        leaf_decoder=leaf_decoder,
+        headers_redact=headers_redact,
+        headers_cb=headers_cb,
+        exception_cb=exception_cb,
+    )
+
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/event.py b/cloudinit/event.py
index 53ad4c25..eaf8bd0b 100644
--- a/cloudinit/event.py
+++ b/cloudinit/event.py
@@ -13,7 +13,7 @@ class EventScope(Enum):
     # NETWORK is currently the only scope, but we want to leave room to
     # grow other scopes (e.g., STORAGE) without having to make breaking
     # changes to the user config
-    NETWORK = 'network'
+    NETWORK = "network"
 
     def __str__(self):  # pylint: disable=invalid-str-returned
         return self.value
@@ -21,6 +21,7 @@ class EventScope(Enum):
 
 class EventType(Enum):
     """Event types which can generate maintenance requests for cloud-init."""
+
     # Cloud-init should grow support for the follow event types:
     # HOTPLUG
     # METADATA_CHANGE
@@ -29,7 +30,7 @@ class EventType(Enum):
     BOOT = "boot"
     BOOT_NEW_INSTANCE = "boot-new-instance"
     BOOT_LEGACY = "boot-legacy"
-    HOTPLUG = 'hotplug'
+    HOTPLUG = "hotplug"
 
     def __str__(self):  # pylint: disable=invalid-str-returned
         return self.value
@@ -58,7 +59,7 @@ def userdata_to_events(user_config: dict) -> Dict[EventScope, Set[EventType]]:
             )
             continue
         try:
-            new_values = [EventType(x) for x in scope_list['when']]
+            new_values = [EventType(x) for x in scope_list["when"]]
         except ValueError as e:
             LOG.warning(
                 "%s! Update data will be ignored for '%s' scope",
@@ -70,4 +71,5 @@ def userdata_to_events(user_config: dict) -> Dict[EventScope, Set[EventType]]:
 
     return update_config
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/filters/launch_index.py b/cloudinit/filters/launch_index.py
index 5c8bcffb..5aeb0a17 100644
--- a/cloudinit/filters/launch_index.py
+++ b/cloudinit/filters/launch_index.py
@@ -23,7 +23,7 @@ class Filter(object):
         self.allow_none = allow_none
 
     def _select(self, message):
-        msg_idx = message.get('Launch-Index', None)
+        msg_idx = message.get("Launch-Index", None)
         if self.allow_none and msg_idx is None:
             return True
         msg_idx = util.safe_int(msg_idx)
@@ -47,9 +47,12 @@ class Filter(object):
                     new_msgs.append(m)
                 else:
                     discarded += 1
-            LOG.debug(("Discarding %s multipart messages "
-                       "which do not match launch index %s"),
-                      discarded, self.wanted_idx)
+            LOG.debug(
+                "Discarding %s multipart messages "
+                "which do not match launch index %s",
+                discarded,
+                self.wanted_idx,
+            )
             new_message = copy.copy(message)
             new_message.set_payload(new_msgs)
             new_message[ud.ATTACHMENT_FIELD] = str(len(new_msgs))
@@ -62,4 +65,5 @@ class Filter(object):
             return root_message
         return self._do_filter(root_message)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/gpg.py b/cloudinit/gpg.py
index 07d682d2..8daa5e37 100644
--- a/cloudinit/gpg.py
+++ b/cloudinit/gpg.py
@@ -7,22 +7,28 @@
 
 """gpg.py - Collection of gpg key related functions"""
 
+import time
+
 from cloudinit import log as logging
 from cloudinit import subp
 
-import time
-
 LOG = logging.getLogger(__name__)
 
-GPG_LIST = ['gpg', '--with-fingerprint', '--no-default-keyring', '--list-keys',
-            '--keyring']
+GPG_LIST = [
+    "gpg",
+    "--with-fingerprint",
+    "--no-default-keyring",
+    "--list-keys",
+    "--keyring",
+]
 
 
 def export_armour(key):
     """Export gpg key, armoured key gets returned"""
     try:
-        (armour, _) = subp.subp(["gpg", "--export", "--armour", key],
-                                capture=True)
+        (armour, _) = subp.subp(
+            ["gpg", "--export", "--armour", key], capture=True
+        )
     except subp.ProcessExecutionError as error:
         # debug, since it happens for any key not on the system initially
         LOG.debug('Failed to export armoured key "%s": %s', key, error)
@@ -33,7 +39,7 @@ def export_armour(key):
 def dearmor(key):
     """Dearmor gpg key, dearmored key gets returned
 
-        note: man gpg(1) makes no mention of an --armour spelling, only --armor
+    note: man gpg(1) makes no mention of an --armour spelling, only --armor
     """
     return subp.subp(["gpg", "--dearmor"], data=key, decode=False)[0]
 
@@ -48,7 +54,7 @@ def list(key_file, human_output=False):
     cmd = []
     cmd.extend(GPG_LIST)
     if not human_output:
-        cmd.append('--with-colons')
+        cmd.append("--with-colons")
 
     cmd.append(key_file)
     (stdout, stderr) = subp.subp(cmd, capture=True)
@@ -82,8 +88,12 @@ def recv_key(key, keyserver, retries=(1, 1)):
         trynum += 1
         try:
             subp.subp(cmd, capture=True)
-            LOG.debug("Imported key '%s' from keyserver '%s' on try %d",
-                      key, keyserver, trynum)
+            LOG.debug(
+                "Imported key '%s' from keyserver '%s' on try %d",
+                key,
+                keyserver,
+                trynum,
+            )
             return
         except subp.ProcessExecutionError as e:
             error = e
@@ -91,25 +101,28 @@ def recv_key(key, keyserver, retries=(1, 1)):
             naplen = next(sleeps)
             LOG.debug(
                 "Import failed with exit code %d, will try again in %ss",
-                error.exit_code, naplen)
+                error.exit_code,
+                naplen,
+            )
             time.sleep(naplen)
         except StopIteration as e:
             raise ValueError(
-                ("Failed to import key '%s' from keyserver '%s' "
-                 "after %d tries: %s") % (key, keyserver, trynum, error)
+                "Failed to import key '%s' from keyserver '%s' "
+                "after %d tries: %s" % (key, keyserver, trynum, error)
             ) from e
 
 
 def delete_key(key):
     """Delete the specified key from the local gpg ring"""
     try:
-        subp.subp(["gpg", "--batch", "--yes", "--delete-keys", key],
-                  capture=True)
+        subp.subp(
+            ["gpg", "--batch", "--yes", "--delete-keys", key], capture=True
+        )
     except subp.ProcessExecutionError as error:
         LOG.warning('Failed delete key "%s": %s', key, error)
 
 
-def getkeybyid(keyid, keyserver='keyserver.ubuntu.com'):
+def getkeybyid(keyid, keyserver="keyserver.ubuntu.com"):
     """get gpg keyid from keyserver"""
     armour = export_armour(keyid)
     if not armour:
@@ -117,7 +130,7 @@ def getkeybyid(keyid, keyserver='keyserver.ubuntu.com'):
             recv_key(keyid, keyserver=keyserver)
             armour = export_armour(keyid)
         except ValueError:
-            LOG.exception('Failed to obtain gpg key %s', keyid)
+            LOG.exception("Failed to obtain gpg key %s", keyid)
             raise
         finally:
             # delete just imported key to leave environment as it was before
@@ -125,4 +138,5 @@ def getkeybyid(keyid, keyserver='keyserver.ubuntu.com'):
 
     return armour
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/handlers/__init__.py b/cloudinit/handlers/__init__.py
index a409ff8a..62c1fd26 100644
--- a/cloudinit/handlers/__init__.py
+++ b/cloudinit/handlers/__init__.py
@@ -13,9 +13,8 @@ import os
 
 from cloudinit import importer
 from cloudinit import log as logging
-from cloudinit import type_utils
-from cloudinit import util
-from cloudinit.settings import (PER_ALWAYS, PER_INSTANCE, FREQUENCIES)
+from cloudinit import type_utils, util
+from cloudinit.settings import FREQUENCIES, PER_ALWAYS, PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
@@ -24,7 +23,7 @@ LOG = logging.getLogger(__name__)
 NOT_MULTIPART_TYPE = "text/x-not-multipart"
 
 # When none is assigned this gets used
-OCTET_TYPE = 'application/octet-stream'
+OCTET_TYPE = "application/octet-stream"
 
 # Special content types that signal the start and end of processing
 CONTENT_END = "__end__"
@@ -34,32 +33,32 @@ CONTENT_SIGNALS = [CONTENT_START, CONTENT_END]
 # Used when a part-handler type is encountered
 # to allow for registration of new types.
 PART_CONTENT_TYPES = ["text/part-handler"]
-PART_HANDLER_FN_TMPL = 'part-handler-%03d'
+PART_HANDLER_FN_TMPL = "part-handler-%03d"
 
 # For parts without filenames
-PART_FN_TPL = 'part-%03d'
+PART_FN_TPL = "part-%03d"
 
 # Different file beginnings to their content type
 INCLUSION_TYPES_MAP = {
-    '#include': 'text/x-include-url',
-    '#include-once': 'text/x-include-once-url',
-    '#!': 'text/x-shellscript',
-    '#cloud-config': 'text/cloud-config',
-    '#upstart-job': 'text/upstart-job',
-    '#part-handler': 'text/part-handler',
-    '#cloud-boothook': 'text/cloud-boothook',
-    '#cloud-config-archive': 'text/cloud-config-archive',
-    '#cloud-config-jsonp': 'text/cloud-config-jsonp',
-    '## template: jinja': 'text/jinja2',
+    "#include": "text/x-include-url",
+    "#include-once": "text/x-include-once-url",
+    "#!": "text/x-shellscript",
+    "#cloud-config": "text/cloud-config",
+    "#upstart-job": "text/upstart-job",
+    "#part-handler": "text/part-handler",
+    "#cloud-boothook": "text/cloud-boothook",
+    "#cloud-config-archive": "text/cloud-config-archive",
+    "#cloud-config-jsonp": "text/cloud-config-jsonp",
+    "## template: jinja": "text/jinja2",
 }
 
 # Sorted longest first
-INCLUSION_SRCH = sorted(list(INCLUSION_TYPES_MAP.keys()),
-                        key=(lambda e: 0 - len(e)))
+INCLUSION_SRCH = sorted(
+    list(INCLUSION_TYPES_MAP.keys()), key=(lambda e: 0 - len(e))
+)
 
 
 class Handler(metaclass=abc.ABCMeta):
-
     def __init__(self, frequency, version=2):
         self.handler_version = version
         self.frequency = frequency
@@ -69,11 +68,13 @@ class Handler(metaclass=abc.ABCMeta):
 
     def list_types(self):
         # Each subclass must define the supported content prefixes it handles.
-        if not hasattr(self, 'prefixes'):
-            raise NotImplementedError('Missing prefixes subclass attribute')
+        if not hasattr(self, "prefixes"):
+            raise NotImplementedError("Missing prefixes subclass attribute")
         else:
-            return [INCLUSION_TYPES_MAP[prefix]
-                    for prefix in getattr(self, 'prefixes')]
+            return [
+                INCLUSION_TYPES_MAP[prefix]
+                for prefix in getattr(self, "prefixes")
+            ]
 
     @abc.abstractmethod
     def handle_part(self, *args, **kwargs):
@@ -82,8 +83,10 @@ class Handler(metaclass=abc.ABCMeta):
 
 def run_part(mod, data, filename, payload, frequency, headers):
     mod_freq = mod.frequency
-    if not (mod_freq == PER_ALWAYS or
-            (frequency == PER_INSTANCE and mod_freq == PER_INSTANCE)):
+    if not (
+        mod_freq == PER_ALWAYS
+        or (frequency == PER_INSTANCE and mod_freq == PER_INSTANCE)
+    ):
         return
     # Sanity checks on version (should be an int convertable)
     try:
@@ -91,33 +94,45 @@ def run_part(mod, data, filename, payload, frequency, headers):
         mod_ver = int(mod_ver)
     except (TypeError, ValueError, AttributeError):
         mod_ver = 1
-    content_type = headers['Content-Type']
+    content_type = headers["Content-Type"]
     try:
-        LOG.debug("Calling handler %s (%s, %s, %s) with frequency %s",
-                  mod, content_type, filename, mod_ver, frequency)
+        LOG.debug(
+            "Calling handler %s (%s, %s, %s) with frequency %s",
+            mod,
+            content_type,
+            filename,
+            mod_ver,
+            frequency,
+        )
         if mod_ver == 3:
             # Treat as v. 3 which does get a frequency + headers
-            mod.handle_part(data, content_type, filename,
-                            payload, frequency, headers)
+            mod.handle_part(
+                data, content_type, filename, payload, frequency, headers
+            )
         elif mod_ver == 2:
             # Treat as v. 2 which does get a frequency
-            mod.handle_part(data, content_type, filename,
-                            payload, frequency)
+            mod.handle_part(data, content_type, filename, payload, frequency)
         elif mod_ver == 1:
             # Treat as v. 1 which gets no frequency
             mod.handle_part(data, content_type, filename, payload)
         else:
             raise ValueError("Unknown module version %s" % (mod_ver))
     except Exception:
-        util.logexc(LOG, "Failed calling handler %s (%s, %s, %s) with "
-                    "frequency %s", mod, content_type, filename, mod_ver,
-                    frequency)
+        util.logexc(
+            LOG,
+            "Failed calling handler %s (%s, %s, %s) with frequency %s",
+            mod,
+            content_type,
+            filename,
+            mod_ver,
+            frequency,
+        )
 
 
 def call_begin(mod, data, frequency):
     # Create a fake header set
     headers = {
-        'Content-Type': CONTENT_START,
+        "Content-Type": CONTENT_START,
     }
     run_part(mod, data, None, None, frequency, headers)
 
@@ -125,31 +140,35 @@ def call_begin(mod, data, frequency):
 def call_end(mod, data, frequency):
     # Create a fake header set
     headers = {
-        'Content-Type': CONTENT_END,
+        "Content-Type": CONTENT_END,
     }
     run_part(mod, data, None, None, frequency, headers)
 
 
 def walker_handle_handler(pdata, _ctype, _filename, payload):
-    curcount = pdata['handlercount']
+    curcount = pdata["handlercount"]
     modname = PART_HANDLER_FN_TMPL % (curcount)
-    frequency = pdata['frequency']
-    modfname = os.path.join(pdata['handlerdir'], "%s" % (modname))
+    frequency = pdata["frequency"]
+    modfname = os.path.join(pdata["handlerdir"], "%s" % (modname))
     if not modfname.endswith(".py"):
         modfname = "%s.py" % (modfname)
     # TODO(harlowja): Check if path exists??
     util.write_file(modfname, payload, 0o600)
-    handlers = pdata['handlers']
+    handlers = pdata["handlers"]
     try:
         mod = fixup_handler(importer.import_module(modname))
-        call_begin(mod, pdata['data'], frequency)
+        call_begin(mod, pdata["data"], frequency)
         # Only register and increment after the above have worked, so we don't
         # register if it fails starting.
         handlers.register(mod, initialized=True)
-        pdata['handlercount'] = curcount + 1
+        pdata["handlercount"] = curcount + 1
     except Exception:
-        util.logexc(LOG, "Failed at registering python file: %s (part "
-                    "handler %s)", modfname, curcount)
+        util.logexc(
+            LOG,
+            "Failed at registering python file: %s (part handler %s)",
+            modfname,
+            curcount,
+        )
 
 
 def _extract_first_or_bytes(blob, size):
@@ -161,7 +180,7 @@ def _extract_first_or_bytes(blob, size):
         else:
             # We want to avoid decoding the whole blob (it might be huge)
             # By taking 4*size bytes we guarantee to decode size utf8 chars
-            start = blob[:4 * size].decode(errors='ignore').split("\n", 1)[0]
+            start = blob[: 4 * size].decode(errors="ignore").split("\n", 1)[0]
         if len(start) >= size:
             start = start[:size]
     except UnicodeDecodeError:
@@ -176,7 +195,7 @@ def _escape_string(text):
     except (LookupError, TypeError):
         try:
             # Unicode (and Python 3's str) doesn't support string_escape...
-            return text.encode('unicode_escape')
+            return text.encode("unicode_escape")
         except TypeError:
             # Give up...
             pass
@@ -189,28 +208,40 @@ def _escape_string(text):
 
 
 def walker_callback(data, filename, payload, headers):
-    content_type = headers['Content-Type']
-    if content_type in data.get('excluded'):
+    content_type = headers["Content-Type"]
+    if content_type in data.get("excluded"):
         LOG.debug('content_type "%s" is excluded', content_type)
         return
 
     if content_type in PART_CONTENT_TYPES:
         walker_handle_handler(data, content_type, filename, payload)
         return
-    handlers = data['handlers']
+    handlers = data["handlers"]
     if content_type in handlers:
-        run_part(handlers[content_type], data['data'], filename,
-                 payload, data['frequency'], headers)
+        run_part(
+            handlers[content_type],
+            data["data"],
+            filename,
+            payload,
+            data["frequency"],
+            headers,
+        )
     elif payload:
         # Extract the first line or 24 bytes for displaying in the log
         start = _extract_first_or_bytes(payload, 24)
         details = "'%s...'" % (_escape_string(start))
         if content_type == NOT_MULTIPART_TYPE:
-            LOG.warning("Unhandled non-multipart (%s) userdata: %s",
-                        content_type, details)
+            LOG.warning(
+                "Unhandled non-multipart (%s) userdata: %s",
+                content_type,
+                details,
+            )
         else:
-            LOG.warning("Unhandled unknown content-type (%s) userdata: %s",
-                        content_type, details)
+            LOG.warning(
+                "Unhandled unknown content-type (%s) userdata: %s",
+                content_type,
+                details,
+            )
     else:
         LOG.debug("Empty payload of type %s", content_type)
 
@@ -221,7 +252,7 @@ def walk(msg, callback, data):
     partnum = 0
     for part in msg.walk():
         # multipart/* are just containers
-        if part.get_content_maintype() == 'multipart':
+        if part.get_content_maintype() == "multipart":
             continue
 
         ctype = part.get_content_type()
@@ -234,7 +265,7 @@ def walk(msg, callback, data):
 
         headers = dict(part)
         LOG.debug(headers)
-        headers['Content-Type'] = ctype
+        headers["Content-Type"] = ctype
         payload = util.fully_decoded_payload(part)
         callback(data, filename, payload, headers)
         partnum = partnum + 1
@@ -243,8 +274,8 @@ def walk(msg, callback, data):
 def fixup_handler(mod, def_freq=PER_INSTANCE):
     if not hasattr(mod, "handler_version"):
         setattr(mod, "handler_version", 1)
-    if not hasattr(mod, 'frequency'):
-        setattr(mod, 'frequency', def_freq)
+    if not hasattr(mod, "frequency"):
+        setattr(mod, "frequency", def_freq)
     else:
         freq = mod.frequency
         if freq and freq not in FREQUENCIES:
@@ -263,4 +294,5 @@ def type_from_starts_with(payload, default=None):
             return INCLUSION_TYPES_MAP[text]
     return default
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/handlers/boot_hook.py b/cloudinit/handlers/boot_hook.py
index c6205097..602800ed 100644
--- a/cloudinit/handlers/boot_hook.py
+++ b/cloudinit/handlers/boot_hook.py
@@ -12,10 +12,8 @@ import os
 
 from cloudinit import handlers
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
-
-from cloudinit.settings import (PER_ALWAYS)
+from cloudinit import subp, util
+from cloudinit.settings import PER_ALWAYS
 
 LOG = logging.getLogger(__name__)
 
@@ -23,7 +21,7 @@ LOG = logging.getLogger(__name__)
 class BootHookPartHandler(handlers.Handler):
 
     # The content prefixes this handler understands.
-    prefixes = ['#cloud-boothook']
+    prefixes = ["#cloud-boothook"]
 
     def __init__(self, paths, datasource, **_kwargs):
         handlers.Handler.__init__(self, PER_ALWAYS)
@@ -35,8 +33,9 @@ class BootHookPartHandler(handlers.Handler):
     def _write_part(self, payload, filename):
         filename = util.clean_filename(filename)
         filepath = os.path.join(self.boothook_dir, filename)
-        contents = util.strip_prefix_suffix(util.dos2unix(payload),
-                                            prefix=self.prefixes[0])
+        contents = util.strip_prefix_suffix(
+            util.dos2unix(payload), prefix=self.prefixes[0]
+        )
         util.write_file(filepath, contents.lstrip(), 0o700)
         return filepath
 
@@ -48,12 +47,14 @@ class BootHookPartHandler(handlers.Handler):
         try:
             env = os.environ.copy()
             if self.instance_id is not None:
-                env['INSTANCE_ID'] = str(self.instance_id)
+                env["INSTANCE_ID"] = str(self.instance_id)
             subp.subp([filepath], env=env)
         except subp.ProcessExecutionError:
             util.logexc(LOG, "Boothooks script %s execution error", filepath)
         except Exception:
-            util.logexc(LOG, "Boothooks unknown error when running %s",
-                        filepath)
+            util.logexc(
+                LOG, "Boothooks unknown error when running %s", filepath
+            )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/handlers/cloud_config.py b/cloudinit/handlers/cloud_config.py
index 2a307364..2e694671 100644
--- a/cloudinit/handlers/cloud_config.py
+++ b/cloudinit/handlers/cloud_config.py
@@ -12,15 +12,12 @@ import jsonpatch
 
 from cloudinit import handlers
 from cloudinit import log as logging
-from cloudinit import mergers
-from cloudinit import util
-from cloudinit import safeyaml
-
-from cloudinit.settings import (PER_ALWAYS)
+from cloudinit import mergers, safeyaml, util
+from cloudinit.settings import PER_ALWAYS
 
 LOG = logging.getLogger(__name__)
 
-MERGE_HEADER = 'Merge-Type'
+MERGE_HEADER = "Merge-Type"
 
 # Due to the way the loading of yaml configuration was done previously,
 # where previously each cloud config part was appended to a larger yaml
@@ -39,7 +36,7 @@ MERGE_HEADER = 'Merge-Type'
 # a: 22
 #
 # This gets loaded into yaml with final result {'a': 22}
-DEF_MERGERS = mergers.string_extract_mergers('dict(replace)+list()+str()')
+DEF_MERGERS = mergers.string_extract_mergers("dict(replace)+list()+str()")
 CLOUD_PREFIX = "#cloud-config"
 JSONP_PREFIX = "#cloud-config-jsonp"
 
@@ -53,7 +50,7 @@ class CloudConfigPartHandler(handlers.Handler):
         handlers.Handler.__init__(self, PER_ALWAYS, version=3)
         self.cloud_buf = None
         self.cloud_fn = paths.get_ipath("cloud_config")
-        if 'cloud_config_path' in _kwargs:
+        if "cloud_config_path" in _kwargs:
             self.cloud_fn = paths.get_ipath(_kwargs["cloud_config_path"])
         self.file_names = []
 
@@ -66,14 +63,14 @@ class CloudConfigPartHandler(handlers.Handler):
             file_lines.append("# from %s files" % (len(self.file_names)))
             for fn in self.file_names:
                 if not fn:
-                    fn = '?'
+                    fn = "?"
                 file_lines.append("# %s" % (fn))
             file_lines.append("")
         if self.cloud_buf is not None:
             # Something was actually gathered....
             lines = [
                 CLOUD_PREFIX,
-                '',
+                "",
             ]
             lines.extend(file_lines)
             lines.append(safeyaml.dumps(self.cloud_buf))
@@ -82,9 +79,9 @@ class CloudConfigPartHandler(handlers.Handler):
         util.write_file(self.cloud_fn, "\n".join(lines), 0o600)
 
     def _extract_mergers(self, payload, headers):
-        merge_header_headers = ''
-        for h in [MERGE_HEADER, 'X-%s' % (MERGE_HEADER)]:
-            tmp_h = headers.get(h, '')
+        merge_header_headers = ""
+        for h in [MERGE_HEADER, "X-%s" % (MERGE_HEADER)]:
+            tmp_h = headers.get(h, "")
             if tmp_h:
                 merge_header_headers = tmp_h
                 break
@@ -143,7 +140,9 @@ class CloudConfigPartHandler(handlers.Handler):
                 filename = filename.replace(i, " ")
             self.file_names.append(filename.strip())
         except Exception:
-            util.logexc(LOG, "Failed at merging in cloud config part from %s",
-                        filename)
+            util.logexc(
+                LOG, "Failed at merging in cloud config part from %s", filename
+            )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/handlers/jinja_template.py b/cloudinit/handlers/jinja_template.py
index de88a5ea..1f9caa64 100644
--- a/cloudinit/handlers/jinja_template.py
+++ b/cloudinit/handlers/jinja_template.py
@@ -1,9 +1,9 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import copy
-from errno import EACCES
 import os
 import re
+from errno import EACCES
 from typing import Optional
 
 try:
@@ -12,28 +12,27 @@ try:
 except ImportError:
     # No jinja2 dependency
     JUndefinedError = Exception
-    operator_re = re.compile(r'[-.]')
+    operator_re = re.compile(r"[-.]")
 
 from cloudinit import handlers
 from cloudinit import log as logging
-from cloudinit.sources import INSTANCE_JSON_SENSITIVE_FILE
-from cloudinit.templater import render_string, MISSING_JINJA_PREFIX
-from cloudinit.util import b64d, load_file, load_json, json_dumps
-
 from cloudinit.settings import PER_ALWAYS
+from cloudinit.sources import INSTANCE_JSON_SENSITIVE_FILE
+from cloudinit.templater import MISSING_JINJA_PREFIX, render_string
+from cloudinit.util import b64d, json_dumps, load_file, load_json
 
 LOG = logging.getLogger(__name__)
 
 
 class JinjaTemplatePartHandler(handlers.Handler):
 
-    prefixes = ['## template: jinja']
+    prefixes = ["## template: jinja"]
 
     def __init__(self, paths, **_kwargs):
         handlers.Handler.__init__(self, PER_ALWAYS, version=3)
         self.paths = paths
         self.sub_handlers = {}
-        for handler in _kwargs.get('sub_handlers', []):
+        for handler in _kwargs.get("sub_handlers", []):
             for ctype in handler.list_types():
                 self.sub_handlers[ctype] = handler
 
@@ -41,28 +40,36 @@ class JinjaTemplatePartHandler(handlers.Handler):
         if ctype in handlers.CONTENT_SIGNALS:
             return
         jinja_json_file = os.path.join(
-            self.paths.run_dir, INSTANCE_JSON_SENSITIVE_FILE)
+            self.paths.run_dir, INSTANCE_JSON_SENSITIVE_FILE
+        )
         rendered_payload = render_jinja_payload_from_file(
-            payload, filename, jinja_json_file)
+            payload, filename, jinja_json_file
+        )
         if not rendered_payload:
             return
         subtype = handlers.type_from_starts_with(rendered_payload)
         sub_handler = self.sub_handlers.get(subtype)
         if not sub_handler:
             LOG.warning(
-                'Ignoring jinja template for %s. Could not find supported'
-                ' sub-handler for type %s', filename, subtype)
+                "Ignoring jinja template for %s. Could not find supported"
+                " sub-handler for type %s",
+                filename,
+                subtype,
+            )
             return
         if sub_handler.handler_version == 3:
             sub_handler.handle_part(
-                data, ctype, filename, rendered_payload, frequency, headers)
+                data, ctype, filename, rendered_payload, frequency, headers
+            )
         elif sub_handler.handler_version == 2:
             sub_handler.handle_part(
-                data, ctype, filename, rendered_payload, frequency)
+                data, ctype, filename, rendered_payload, frequency
+            )
 
 
 def render_jinja_payload_from_file(
-        payload, payload_fn, instance_data_file, debug=False):
+    payload, payload_fn, instance_data_file, debug=False
+):
     """Render a jinja template payload sourcing variables from jinja_vars_path.
 
     @param payload: String of jinja template content. Should begin with
@@ -80,19 +87,21 @@ def render_jinja_payload_from_file(
     rendered_payload = None
     if not os.path.exists(instance_data_file):
         raise RuntimeError(
-            'Cannot render jinja template vars. Instance data not yet'
-            ' present at %s' % instance_data_file)
+            "Cannot render jinja template vars. Instance data not yet"
+            " present at %s" % instance_data_file
+        )
     try:
         instance_data = load_json(load_file(instance_data_file))
     except (IOError, OSError) as e:
         if e.errno == EACCES:
             raise RuntimeError(
-                'Cannot render jinja template vars. No read permission on'
+                "Cannot render jinja template vars. No read permission on"
                 " '%s'. Try sudo" % instance_data_file
             ) from e
 
     rendered_payload = render_jinja_payload(
-        payload, payload_fn, instance_data, debug)
+        payload, payload_fn, instance_data, debug
+    )
     if not rendered_payload:
         return None
     return rendered_payload
@@ -101,26 +110,30 @@ def render_jinja_payload_from_file(
 def render_jinja_payload(payload, payload_fn, instance_data, debug=False):
     instance_jinja_vars = convert_jinja_instance_data(
         instance_data,
-        decode_paths=instance_data.get('base64-encoded-keys', []),
-        include_key_aliases=True
+        decode_paths=instance_data.get("base64-encoded-keys", []),
+        include_key_aliases=True,
     )
     if debug:
-        LOG.debug('Converted jinja variables\n%s',
-                  json_dumps(instance_jinja_vars))
+        LOG.debug(
+            "Converted jinja variables\n%s", json_dumps(instance_jinja_vars)
+        )
     try:
         rendered_payload = render_string(payload, instance_jinja_vars)
     except (TypeError, JUndefinedError) as e:
-        LOG.warning(
-            'Ignoring jinja template for %s: %s', payload_fn, str(e))
+        LOG.warning("Ignoring jinja template for %s: %s", payload_fn, str(e))
         return None
     warnings = [
-        "'%s'" % var.replace(MISSING_JINJA_PREFIX, '')
+        "'%s'" % var.replace(MISSING_JINJA_PREFIX, "")
         for var in re.findall(
-            r'%s[^\s]+' % MISSING_JINJA_PREFIX, rendered_payload)]
+            r"%s[^\s]+" % MISSING_JINJA_PREFIX, rendered_payload
+        )
+    ]
     if warnings:
         LOG.warning(
             "Could not render jinja template variables in file '%s': %s",
-            payload_fn, ', '.join(warnings))
+            payload_fn,
+            ", ".join(warnings),
+        )
     return rendered_payload
 
 
@@ -139,14 +152,14 @@ def get_jinja_variable_alias(orig_name: str) -> Optional[str]:
     :return: A string with any jinja operators replaced if needed. Otherwise,
         none if no alias required.
     """
-    alias_name = re.sub(operator_re, '_', orig_name)
+    alias_name = re.sub(operator_re, "_", orig_name)
     if alias_name != orig_name:
         return alias_name
     return None
 
 
 def convert_jinja_instance_data(
-    data, prefix='', sep='/', decode_paths=(), include_key_aliases=False
+    data, prefix="", sep="/", decode_paths=(), include_key_aliases=False
 ):
     """Process instance-data.json dict for use in jinja templates.
 
@@ -154,17 +167,20 @@ def convert_jinja_instance_data(
     base64_encoded_keys.
     """
     result = {}
-    decode_paths = [path.replace('-', '_') for path in decode_paths]
+    decode_paths = [path.replace("-", "_") for path in decode_paths]
     for key, value in sorted(data.items()):
-        key_path = '{0}{1}{2}'.format(prefix, sep, key) if prefix else key
+        key_path = "{0}{1}{2}".format(prefix, sep, key) if prefix else key
         if key_path in decode_paths:
             value = b64d(value)
         if isinstance(value, dict):
             result[key] = convert_jinja_instance_data(
-                value, key_path, sep=sep, decode_paths=decode_paths,
-                include_key_aliases=include_key_aliases
+                value,
+                key_path,
+                sep=sep,
+                decode_paths=decode_paths,
+                include_key_aliases=include_key_aliases,
             )
-            if re.match(r'v\d+$', key):
+            if re.match(r"v\d+$", key):
                 # Copy values to top-level aliases
                 for subkey, subvalue in result[key].items():
                     result[subkey] = copy.deepcopy(subvalue)
@@ -176,4 +192,5 @@ def convert_jinja_instance_data(
                 result[alias_name] = copy.deepcopy(result[key])
     return result
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/handlers/shell_script.py b/cloudinit/handlers/shell_script.py
index 9917f551..44061838 100644
--- a/cloudinit/handlers/shell_script.py
+++ b/cloudinit/handlers/shell_script.py
@@ -10,21 +10,19 @@
 
 import os
 
-from cloudinit import handlers
-from cloudinit import util
-
-from cloudinit.settings import (PER_ALWAYS)
+from cloudinit import handlers, util
+from cloudinit.settings import PER_ALWAYS
 
 
 class ShellScriptPartHandler(handlers.Handler):
 
-    prefixes = ['#!']
+    prefixes = ["#!"]
 
     def __init__(self, paths, **_kwargs):
         handlers.Handler.__init__(self, PER_ALWAYS)
-        self.script_dir = paths.get_ipath_cur('scripts')
-        if 'script_path' in _kwargs:
-            self.script_dir = paths.get_ipath_cur(_kwargs['script_path'])
+        self.script_dir = paths.get_ipath_cur("scripts")
+        if "script_path" in _kwargs:
+            self.script_dir = paths.get_ipath_cur(_kwargs["script_path"])
 
     def handle_part(self, data, ctype, filename, payload, frequency):
         if ctype in handlers.CONTENT_SIGNALS:
@@ -36,4 +34,5 @@ class ShellScriptPartHandler(handlers.Handler):
         path = os.path.join(self.script_dir, filename)
         util.write_file(path, payload, 0o700)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/handlers/upstart_job.py b/cloudinit/handlers/upstart_job.py
index a9d29537..4bc95f97 100644
--- a/cloudinit/handlers/upstart_job.py
+++ b/cloudinit/handlers/upstart_job.py
@@ -13,17 +13,15 @@ import re
 
 from cloudinit import handlers
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
-
-from cloudinit.settings import (PER_INSTANCE)
+from cloudinit import subp, util
+from cloudinit.settings import PER_INSTANCE
 
 LOG = logging.getLogger(__name__)
 
 
 class UpstartJobPartHandler(handlers.Handler):
 
-    prefixes = ['#upstart-job']
+    prefixes = ["#upstart-job"]
 
     def __init__(self, paths, **_kwargs):
         handlers.Handler.__init__(self, PER_INSTANCE)
@@ -43,7 +41,7 @@ class UpstartJobPartHandler(handlers.Handler):
         filename = util.clean_filename(filename)
         (_name, ext) = os.path.splitext(filename)
         if not ext:
-            ext = ''
+            ext = ""
         ext = ext.lower()
         if ext != ".conf":
             filename = filename + ".conf"
@@ -78,9 +76,10 @@ def _has_suitable_upstart():
         if not os.path.exists("/usr/bin/dpkg-query"):
             return False
         try:
-            (dpkg_ver, _err) = subp.subp(["dpkg-query",
-                                          "--showformat=${Version}",
-                                          "--show", "upstart"], rcs=[0, 1])
+            (dpkg_ver, _err) = subp.subp(
+                ["dpkg-query", "--showformat=${Version}", "--show", "upstart"],
+                rcs=[0, 1],
+            )
         except Exception:
             util.logexc(LOG, "dpkg-query failed")
             return False
@@ -93,8 +92,9 @@ def _has_suitable_upstart():
             if e.exit_code == 1:
                 pass
             else:
-                util.logexc(LOG, "dpkg --compare-versions failed [%s]",
-                            e.exit_code)
+                util.logexc(
+                    LOG, "dpkg --compare-versions failed [%s]", e.exit_code
+                )
         except Exception:
             util.logexc(LOG, "dpkg --compare-versions failed")
         return False
diff --git a/cloudinit/helpers.py b/cloudinit/helpers.py
index b8f9d2c3..c2c9e584 100644
--- a/cloudinit/helpers.py
+++ b/cloudinit/helpers.py
@@ -8,20 +8,15 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from time import time
-
 import contextlib
 import os
-from configparser import NoSectionError, NoOptionError, RawConfigParser
+from configparser import NoOptionError, NoSectionError, RawConfigParser
 from io import StringIO
-
-from cloudinit.settings import (PER_INSTANCE, PER_ALWAYS, PER_ONCE,
-                                CFG_ENV_NAME)
+from time import time
 
 from cloudinit import log as logging
-from cloudinit import type_utils
-from cloudinit import persistence
-from cloudinit import util
+from cloudinit import persistence, type_utils, util
+from cloudinit.settings import CFG_ENV_NAME, PER_ALWAYS, PER_INSTANCE, PER_ONCE
 
 LOG = logging.getLogger(__name__)
 
@@ -92,8 +87,9 @@ class FileSemaphores(object):
         try:
             util.del_dir(self.sem_path)
         except (IOError, OSError):
-            util.logexc(LOG, "Failed deleting semaphore directory %s",
-                        self.sem_path)
+            util.logexc(
+                LOG, "Failed deleting semaphore directory %s", self.sem_path
+            )
 
     def _acquire(self, name, freq):
         # Check again if its been already gotten
@@ -125,11 +121,14 @@ class FileSemaphores(object):
         # this case could happen if the migrator module hadn't run yet
         # but the item had run before we did canon_sem_name.
         if cname != name and os.path.exists(self._get_path(name, freq)):
-            LOG.warning("%s has run without canonicalized name [%s].\n"
-                        "likely the migrator has not yet run. "
-                        "It will run next boot.\n"
-                        "run manually with: cloud-init single --name=migrator",
-                        name, cname)
+            LOG.warning(
+                "%s has run without canonicalized name [%s].\n"
+                "likely the migrator has not yet run. "
+                "It will run next boot.\n"
+                "run manually with: cloud-init single --name=migrator",
+                name,
+                cname,
+            )
             return True
 
         return False
@@ -188,9 +187,14 @@ class Runners(object):
 
 
 class ConfigMerger(object):
-    def __init__(self, paths=None, datasource=None,
-                 additional_fns=None, base_cfg=None,
-                 include_vendor=True):
+    def __init__(
+        self,
+        paths=None,
+        datasource=None,
+        additional_fns=None,
+        base_cfg=None,
+        include_vendor=True,
+    ):
         self._paths = paths
         self._ds = datasource
         self._fns = additional_fns
@@ -207,8 +211,11 @@ class ConfigMerger(object):
                 if ds_cfg and isinstance(ds_cfg, (dict)):
                     d_cfgs.append(ds_cfg)
             except Exception:
-                util.logexc(LOG, "Failed loading of datasource config object "
-                            "from %s", self._ds)
+                util.logexc(
+                    LOG,
+                    "Failed loading of datasource config object from %s",
+                    self._ds,
+                )
         return d_cfgs
 
     def _get_env_configs(self):
@@ -218,8 +225,7 @@ class ConfigMerger(object):
             try:
                 e_cfgs.append(util.read_conf(e_fn))
             except Exception:
-                util.logexc(LOG, 'Failed loading of env. config from %s',
-                            e_fn)
+                util.logexc(LOG, "Failed loading of env. config from %s", e_fn)
         return e_cfgs
 
     def _get_instance_configs(self):
@@ -229,13 +235,13 @@ class ConfigMerger(object):
         if not self._paths:
             return i_cfgs
 
-        cc_paths = ['cloud_config']
+        cc_paths = ["cloud_config"]
         if self._include_vendor:
             # the order is important here: we want vendor2
             #  (dynamic vendor data from OpenStack)
             #  to override vendor (static data from OpenStack)
-            cc_paths.append('vendor2_cloud_config')
-            cc_paths.append('vendor_cloud_config')
+            cc_paths.append("vendor2_cloud_config")
+            cc_paths.append("vendor_cloud_config")
 
         for cc_p in cc_paths:
             cc_fn = self._paths.get_ipath_cur(cc_p)
@@ -244,11 +250,14 @@ class ConfigMerger(object):
                     i_cfgs.append(util.read_conf(cc_fn))
                 except PermissionError:
                     LOG.debug(
-                        'Skipped loading cloud-config from %s due to'
-                        ' non-root.', cc_fn)
+                        "Skipped loading cloud-config from %s due to"
+                        " non-root.",
+                        cc_fn,
+                    )
                 except Exception:
-                    util.logexc(LOG, 'Failed loading of cloud-config from %s',
-                                cc_fn)
+                    util.logexc(
+                        LOG, "Failed loading of cloud-config from %s", cc_fn
+                    )
         return i_cfgs
 
     def _read_cfg(self):
@@ -264,8 +273,9 @@ class ConfigMerger(object):
                 try:
                     cfgs.append(util.read_conf(c_fn))
                 except Exception:
-                    util.logexc(LOG, "Failed loading of configuration from %s",
-                                c_fn)
+                    util.logexc(
+                        LOG, "Failed loading of configuration from %s", c_fn
+                    )
 
         cfgs.extend(self._get_env_configs())
         cfgs.extend(self._get_instance_configs())
@@ -283,7 +293,6 @@ class ConfigMerger(object):
 
 
 class ContentHandlers(object):
-
     def __init__(self):
         self.registered = {}
         self.initialized = []
@@ -324,15 +333,15 @@ class Paths(persistence.CloudInitPickleMixin):
     def __init__(self, path_cfgs, ds=None):
         self.cfgs = path_cfgs
         # Populate all the initial paths
-        self.cloud_dir = path_cfgs.get('cloud_dir', '/var/lib/cloud')
-        self.run_dir = path_cfgs.get('run_dir', '/run/cloud-init')
-        self.instance_link = os.path.join(self.cloud_dir, 'instance')
+        self.cloud_dir = path_cfgs.get("cloud_dir", "/var/lib/cloud")
+        self.run_dir = path_cfgs.get("run_dir", "/run/cloud-init")
+        self.instance_link = os.path.join(self.cloud_dir, "instance")
         self.boot_finished = os.path.join(self.instance_link, "boot-finished")
-        self.upstart_conf_d = path_cfgs.get('upstart_dir')
-        self.seed_dir = os.path.join(self.cloud_dir, 'seed')
+        self.upstart_conf_d = path_cfgs.get("upstart_dir")
+        self.seed_dir = os.path.join(self.cloud_dir, "seed")
         # This one isn't joined, since it should just be read-only
-        template_dir = path_cfgs.get('templates_dir', '/etc/cloud/templates/')
-        self.template_tpl = os.path.join(template_dir, '%s.tmpl')
+        template_dir = path_cfgs.get("templates_dir", "/etc/cloud/templates/")
+        self.template_tpl = os.path.join(template_dir, "%s.tmpl")
         self.lookups = {
             "handlers": "handlers",
             "scripts": "scripts",
@@ -366,8 +375,8 @@ class Paths(persistence.CloudInitPickleMixin):
             # we will rely on this attribute. To fix that, we are now
             # manually adding that attribute here.
             self.run_dir = Paths(
-                path_cfgs=self.cfgs,
-                ds=self.datasource).run_dir
+                path_cfgs=self.cfgs, ds=self.datasource
+            ).run_dir
 
     # get_ipath_cur: get the current instance path for an item
     def get_ipath_cur(self, name=None):
@@ -386,8 +395,8 @@ class Paths(persistence.CloudInitPickleMixin):
         iid = self.datasource.get_instance_id()
         if iid is None:
             return None
-        path_safe_iid = str(iid).replace(os.sep, '_')
-        ipath = os.path.join(self.cloud_dir, 'instances', path_safe_iid)
+        path_safe_iid = str(iid).replace(os.sep, "_")
+        ipath = os.path.join(self.cloud_dir, "instances", path_safe_iid)
         add_on = self.lookups.get(name)
         if add_on:
             ipath = os.path.join(ipath, add_on)
@@ -399,8 +408,10 @@ class Paths(persistence.CloudInitPickleMixin):
     def get_ipath(self, name=None):
         ipath = self._get_ipath(name)
         if not ipath:
-            LOG.warning(("No per instance data available, "
-                         "is there an datasource/iid set?"))
+            LOG.warning(
+                "No per instance data available, "
+                "is there an datasource/iid set?"
+            )
             return None
         else:
             return ipath
@@ -423,6 +434,7 @@ class Paths(persistence.CloudInitPickleMixin):
 # you can avoid catching exceptions that you typically don't
 # care about...
 
+
 class DefaultingConfigParser(RawConfigParser):
     DEF_INT = 0
     DEF_FLOAT = 0.0
@@ -440,7 +452,7 @@ class DefaultingConfigParser(RawConfigParser):
         return value
 
     def set(self, section, option, value=None):
-        if not self.has_section(section) and section.lower() != 'default':
+        if not self.has_section(section) and section.lower() != "default":
             self.add_section(section)
         RawConfigParser.set(self, section, option, value)
 
@@ -464,13 +476,14 @@ class DefaultingConfigParser(RawConfigParser):
         return RawConfigParser.getint(self, section, option)
 
     def stringify(self, header=None):
-        contents = ''
+        contents = ""
         outputstream = StringIO()
         self.write(outputstream)
         outputstream.flush()
         contents = outputstream.getvalue()
         if header:
-            contents = '\n'.join([header, contents, ''])
+            contents = "\n".join([header, contents, ""])
         return contents
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/importer.py b/cloudinit/importer.py
index 4e677af3..f84ff4da 100644
--- a/cloudinit/importer.py
+++ b/cloudinit/importer.py
@@ -48,7 +48,7 @@ def find_module(base_name: str, search_paths, required_attrs=None) -> tuple:
         if path:
             real_path.extend(path.split("."))
         real_path.append(base_name)
-        full_path = '.'.join(real_path)
+        full_path = ".".join(real_path)
         lookup_paths.append(full_path)
     found_paths = []
     for full_path in lookup_paths:
@@ -67,4 +67,5 @@ def find_module(base_name: str, search_paths, required_attrs=None) -> tuple:
             found_paths.append(full_path)
     return (found_paths, lookup_paths)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/log.py b/cloudinit/log.py
index 10149907..f40201bb 100644
--- a/cloudinit/log.py
+++ b/cloudinit/log.py
@@ -28,7 +28,7 @@ DEBUG = logging.DEBUG
 NOTSET = logging.NOTSET
 
 # Default basic format
-DEF_CON_FORMAT = '%(asctime)s - %(filename)s[%(levelname)s]: %(message)s'
+DEF_CON_FORMAT = "%(asctime)s - %(filename)s[%(levelname)s]: %(message)s"
 
 # Always format logging timestamps as UTC time
 logging.Formatter.converter = time.gmtime
@@ -39,8 +39,8 @@ def setupBasicLogging(level=DEBUG, formatter=None):
         formatter = logging.Formatter(DEF_CON_FORMAT)
     root = logging.getLogger()
     for handler in root.handlers:
-        if hasattr(handler, 'stream') and hasattr(handler.stream, 'name'):
-            if handler.stream.name == '<stderr>':
+        if hasattr(handler, "stream") and hasattr(handler.stream, "name"):
+            if handler.stream.name == "<stderr>":
                 handler.setLevel(level)
                 return
     # Didn't have an existing stderr handler; create a new handler
@@ -69,18 +69,18 @@ def setupLogging(cfg=None):
         cfg = {}
 
     log_cfgs = []
-    log_cfg = cfg.get('logcfg')
+    log_cfg = cfg.get("logcfg")
     if log_cfg and isinstance(log_cfg, str):
         # If there is a 'logcfg' entry in the config,
         # respect it, it is the old keyname
         log_cfgs.append(str(log_cfg))
     elif "log_cfgs" in cfg:
-        for a_cfg in cfg['log_cfgs']:
+        for a_cfg in cfg["log_cfgs"]:
             if isinstance(a_cfg, str):
                 log_cfgs.append(a_cfg)
             elif isinstance(a_cfg, (collections.abc.Iterable)):
                 cfg_str = [str(c) for c in a_cfg]
-                log_cfgs.append('\n'.join(cfg_str))
+                log_cfgs.append("\n".join(cfg_str))
             else:
                 log_cfgs.append(str(a_cfg))
 
@@ -109,16 +109,17 @@ def setupLogging(cfg=None):
             pass
 
     # If it didn't work, at least setup a basic logger (if desired)
-    basic_enabled = cfg.get('log_basic', True)
+    basic_enabled = cfg.get("log_basic", True)
 
-    sys.stderr.write(("WARN: no logging configured!"
-                      " (tried %s configs)\n") % (am_tried))
+    sys.stderr.write(
+        "WARN: no logging configured! (tried %s configs)\n" % (am_tried)
+    )
     if basic_enabled:
         sys.stderr.write("Setting up basic logging...\n")
         setupBasicLogging()
 
 
-def getLogger(name='cloudinit'):
+def getLogger(name="cloudinit"):
     return logging.getLogger(name)
 
 
diff --git a/cloudinit/mergers/__init__.py b/cloudinit/mergers/__init__.py
index 7fa493a6..a7a6a47f 100644
--- a/cloudinit/mergers/__init__.py
+++ b/cloudinit/mergers/__init__.py
@@ -6,14 +6,13 @@
 
 import re
 
-from cloudinit import importer
-from cloudinit import type_utils
+from cloudinit import importer, type_utils
 
 NAME_MTCH = re.compile(r"(^[a-zA-Z_][A-Za-z0-9_]*)\((.*?)\)$")
 
 DEF_MERGE_TYPE = "list()+dict()+str()"
-MERGER_PREFIX = 'm_'
-MERGER_ATTR = 'Merger'
+MERGER_PREFIX = "m_"
+MERGER_ATTR = "Merger"
 
 
 class UnknownMerger(object):
@@ -53,7 +52,7 @@ class LookupMerger(UnknownMerger):
             self._lookups = lookups
 
     def __str__(self):
-        return 'LookupMerger: (%s)' % (len(self._lookups))
+        return "LookupMerger: (%s)" % (len(self._lookups))
 
     # For items which can not be merged by the parent this object
     # will lookup in a internally maintained set of objects and
@@ -69,25 +68,26 @@ class LookupMerger(UnknownMerger):
                 meth = getattr(merger, meth_wanted)
                 break
         if not meth:
-            return UnknownMerger._handle_unknown(self, meth_wanted,
-                                                 value, merge_with)
+            return UnknownMerger._handle_unknown(
+                self, meth_wanted, value, merge_with
+            )
         return meth(value, merge_with)
 
 
 def dict_extract_mergers(config):
     parsed_mergers = []
-    raw_mergers = config.pop('merge_how', None)
+    raw_mergers = config.pop("merge_how", None)
     if raw_mergers is None:
-        raw_mergers = config.pop('merge_type', None)
+        raw_mergers = config.pop("merge_type", None)
     if raw_mergers is None:
         return parsed_mergers
     if isinstance(raw_mergers, str):
         return string_extract_mergers(raw_mergers)
     for m in raw_mergers:
         if isinstance(m, (dict)):
-            name = m['name']
+            name = m["name"]
             name = name.replace("-", "_").strip()
-            opts = m['settings']
+            opts = m["settings"]
         else:
             name = m[0]
             if len(m) >= 2:
@@ -110,8 +110,9 @@ def string_extract_mergers(merge_how):
             continue
         match = NAME_MTCH.match(m_name)
         if not match:
-            msg = ("Matcher identifer '%s' is not in the right format" %
-                   (m_name))
+            msg = "Matcher identifer '%s' is not in the right format" % (
+                m_name
+            )
             raise ValueError(msg)
         (m_name, m_ops) = match.groups()
         m_ops = m_ops.strip().split(",")
@@ -129,14 +130,15 @@ def construct(parsed_mergers):
     for (m_name, m_ops) in parsed_mergers:
         if not m_name.startswith(MERGER_PREFIX):
             m_name = MERGER_PREFIX + str(m_name)
-        merger_locs, looked_locs = importer.find_module(m_name,
-                                                        [__name__],
-                                                        [MERGER_ATTR])
+        merger_locs, looked_locs = importer.find_module(
+            m_name, [__name__], [MERGER_ATTR]
+        )
         if not merger_locs:
-            msg = ("Could not find merger module named '%s' "
-                   "with attribute '%s' (searched %s)") % (m_name,
-                                                           MERGER_ATTR,
-                                                           looked_locs)
+            msg = (
+                "Could not find merger module named '%s' "
+                "with attribute '%s' (searched %s)"
+                % (m_name, MERGER_ATTR, looked_locs)
+            )
             raise ImportError(msg)
         else:
             mod = importer.import_module(merger_locs[0])
@@ -149,4 +151,5 @@ def construct(parsed_mergers):
         mergers.append(attr(root, opts))
     return root
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/mergers/m_dict.py b/cloudinit/mergers/m_dict.py
index 93472f13..274ccafc 100644
--- a/cloudinit/mergers/m_dict.py
+++ b/cloudinit/mergers/m_dict.py
@@ -4,8 +4,11 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-DEF_MERGE_TYPE = 'no_replace'
-MERGE_TYPES = ('replace', DEF_MERGE_TYPE,)
+DEF_MERGE_TYPE = "no_replace"
+MERGE_TYPES = (
+    "replace",
+    DEF_MERGE_TYPE,
+)
 
 
 def _has_any(what, *keys):
@@ -25,21 +28,27 @@ class Merger(object):
                 self._method = m
                 break
         # Affect how recursive merging is done on other primitives.
-        self._recurse_str = 'recurse_str' in opts
-        self._recurse_array = _has_any(opts, 'recurse_array', 'recurse_list')
-        self._allow_delete = 'allow_delete' in opts
+        self._recurse_str = "recurse_str" in opts
+        self._recurse_array = _has_any(opts, "recurse_array", "recurse_list")
+        self._allow_delete = "allow_delete" in opts
         # Backwards compat require this to be on.
         self._recurse_dict = True
 
     def __str__(self):
-        s = ('DictMerger: (method=%s,recurse_str=%s,'
-             'recurse_dict=%s,recurse_array=%s,allow_delete=%s)')
-        s = s % (self._method, self._recurse_str,
-                 self._recurse_dict, self._recurse_array, self._allow_delete)
+        s = (
+            "DictMerger: (method=%s,recurse_str=%s,"
+            "recurse_dict=%s,recurse_array=%s,allow_delete=%s)"
+        )
+        s = s % (
+            self._method,
+            self._recurse_str,
+            self._recurse_dict,
+            self._recurse_array,
+            self._allow_delete,
+        )
         return s
 
     def _do_dict_replace(self, value, merge_with, do_replace):
-
         def merge_same_key(old_v, new_v):
             if do_replace:
                 return new_v
@@ -65,12 +74,13 @@ class Merger(object):
     def _on_dict(self, value, merge_with):
         if not isinstance(merge_with, (dict)):
             return value
-        if self._method == 'replace':
+        if self._method == "replace":
             merged = self._do_dict_replace(dict(value), merge_with, True)
-        elif self._method == 'no_replace':
+        elif self._method == "no_replace":
             merged = self._do_dict_replace(dict(value), merge_with, False)
         else:
             raise NotImplementedError("Unknown merge type %s" % (self._method))
         return merged
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/mergers/m_list.py b/cloudinit/mergers/m_list.py
index 19f32771..9dfae8cd 100644
--- a/cloudinit/mergers/m_list.py
+++ b/cloudinit/mergers/m_list.py
@@ -4,8 +4,8 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-DEF_MERGE_TYPE = 'replace'
-MERGE_TYPES = ('append', 'prepend', DEF_MERGE_TYPE, 'no_replace')
+DEF_MERGE_TYPE = "replace"
+MERGE_TYPES = ("append", "prepend", DEF_MERGE_TYPE, "no_replace")
 
 
 def _has_any(what, *keys):
@@ -25,38 +25,44 @@ class Merger(object):
                 self._method = m
                 break
         # Affect how recursive merging is done on other primitives
-        self._recurse_str = _has_any(opts, 'recurse_str')
-        self._recurse_dict = _has_any(opts, 'recurse_dict')
-        self._recurse_array = _has_any(opts, 'recurse_array', 'recurse_list')
+        self._recurse_str = _has_any(opts, "recurse_str")
+        self._recurse_dict = _has_any(opts, "recurse_dict")
+        self._recurse_array = _has_any(opts, "recurse_array", "recurse_list")
 
     def __str__(self):
-        return ('ListMerger: (method=%s,recurse_str=%s,'
-                'recurse_dict=%s,recurse_array=%s)') % (self._method,
-                                                        self._recurse_str,
-                                                        self._recurse_dict,
-                                                        self._recurse_array)
+        return (
+            "ListMerger: (method=%s,recurse_str=%s,"
+            "recurse_dict=%s,recurse_array=%s)"
+            % (
+                self._method,
+                self._recurse_str,
+                self._recurse_dict,
+                self._recurse_array,
+            )
+        )
 
     def _on_tuple(self, value, merge_with):
         return tuple(self._on_list(list(value), merge_with))
 
     def _on_list(self, value, merge_with):
-        if (self._method == 'replace' and
-                not isinstance(merge_with, (tuple, list))):
+        if self._method == "replace" and not isinstance(
+            merge_with, (tuple, list)
+        ):
             return merge_with
 
         # Ok we now know that what we are merging with is a list or tuple.
         merged_list = []
-        if self._method == 'prepend':
+        if self._method == "prepend":
             merged_list.extend(merge_with)
             merged_list.extend(value)
             return merged_list
-        elif self._method == 'append':
+        elif self._method == "append":
             merged_list.extend(value)
             merged_list.extend(merge_with)
             return merged_list
 
         def merge_same_index(old_v, new_v):
-            if self._method == 'no_replace':
+            if self._method == "no_replace":
                 # Leave it be...
                 return old_v
             if isinstance(new_v, (list, tuple)) and self._recurse_array:
@@ -74,4 +80,5 @@ class Merger(object):
             merged_list[i] = merge_same_index(merged_list[i], merge_with[i])
         return merged_list
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/mergers/m_str.py b/cloudinit/mergers/m_str.py
index 539e3e29..a96bae5e 100644
--- a/cloudinit/mergers/m_str.py
+++ b/cloudinit/mergers/m_str.py
@@ -7,10 +7,10 @@
 
 class Merger(object):
     def __init__(self, _merger, opts):
-        self._append = 'append' in opts
+        self._append = "append" in opts
 
     def __str__(self):
-        return 'StringMerger: (append=%s)' % (self._append)
+        return "StringMerger: (append=%s)" % (self._append)
 
     # On encountering a unicode object to merge value with
     # we will for now just proxy into the string method to let it handle it.
@@ -27,4 +27,5 @@ class Merger(object):
             return merge_with
         return value + merge_with
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/net/__init__.py b/cloudinit/net/__init__.py
index f81f3a7b..1a738dbc 100644
--- a/cloudinit/net/__init__.py
+++ b/cloudinit/net/__init__.py
@@ -13,14 +13,13 @@ import os
 import re
 from typing import Any, Dict
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from cloudinit.net.network_state import mask_to_net_prefix
 from cloudinit.url_helper import UrlError, readurl
 
 LOG = logging.getLogger(__name__)
 SYS_CLASS_NET = "/sys/class/net/"
-DEFAULT_PRIMARY_INTERFACE = 'eth0'
+DEFAULT_PRIMARY_INTERFACE = "eth0"
 OVS_INTERNAL_INTERFACE_LOOKUP_CMD = [
     "ovs-vsctl",
     "--format",
@@ -36,15 +35,17 @@ OVS_INTERNAL_INTERFACE_LOOKUP_CMD = [
 ]
 
 
-def natural_sort_key(s, _nsre=re.compile('([0-9]+)')):
+def natural_sort_key(s, _nsre=re.compile("([0-9]+)")):
     """Sorting for Humans: natural sort order. Can be use as the key to sort
     functions.
     This will sort ['eth0', 'ens3', 'ens10', 'ens12', 'ens8', 'ens0'] as
     ['ens0', 'ens3', 'ens8', 'ens10', 'ens12', 'eth0'] instead of the simple
     python way which will produce ['ens0', 'ens10', 'ens12', 'ens3', 'ens8',
     'eth0']."""
-    return [int(text) if text.isdigit() else text.lower()
-            for text in re.split(_nsre, s)]
+    return [
+        int(text) if text.isdigit() else text.lower()
+        for text in re.split(_nsre, s)
+    ]
 
 
 def get_sys_class_path():
@@ -56,14 +57,19 @@ def sys_dev_path(devname, path=""):
     return get_sys_class_path() + devname + "/" + path
 
 
-def read_sys_net(devname, path, translate=None,
-                 on_enoent=None, on_keyerror=None,
-                 on_einval=None):
+def read_sys_net(
+    devname,
+    path,
+    translate=None,
+    on_enoent=None,
+    on_keyerror=None,
+    on_einval=None,
+):
     dev_path = sys_dev_path(devname, path)
     try:
         contents = util.load_file(dev_path)
     except (OSError, IOError) as e:
-        e_errno = getattr(e, 'errno', None)
+        e_errno = getattr(e, "errno", None)
         if e_errno in (errno.ENOENT, errno.ENOTDIR):
             if on_enoent is not None:
                 return on_enoent(e)
@@ -80,19 +86,26 @@ def read_sys_net(devname, path, translate=None,
         if on_keyerror is not None:
             return on_keyerror(e)
         else:
-            LOG.debug("Found unexpected (not translatable) value"
-                      " '%s' in '%s", contents, dev_path)
+            LOG.debug(
+                "Found unexpected (not translatable) value '%s' in '%s",
+                contents,
+                dev_path,
+            )
             raise
 
 
 def read_sys_net_safe(iface, field, translate=None):
     def on_excp_false(e):
         return False
-    return read_sys_net(iface, field,
-                        on_keyerror=on_excp_false,
-                        on_enoent=on_excp_false,
-                        on_einval=on_excp_false,
-                        translate=translate)
+
+    return read_sys_net(
+        iface,
+        field,
+        on_keyerror=on_excp_false,
+        on_enoent=on_excp_false,
+        on_einval=on_excp_false,
+        translate=translate,
+    )
 
 
 def read_sys_net_int(iface, field):
@@ -109,7 +122,7 @@ def is_up(devname):
     # The linux kernel says to consider devices in 'unknown'
     # operstate as up for the purposes of network configuration. See
     # Documentation/networking/operstates.txt in the kernel source.
-    translate = {'up': True, 'unknown': True, 'down': False}
+    translate = {"up": True, "unknown": True, "down": False}
     return read_sys_net_safe(devname, "operstate", translate=translate)
 
 
@@ -136,7 +149,7 @@ def master_is_bridge_or_bond(devname):
         return False
     bonding_path = os.path.join(master_path, "bonding")
     bridge_path = os.path.join(master_path, "bridge")
-    return (os.path.exists(bonding_path) or os.path.exists(bridge_path))
+    return os.path.exists(bonding_path) or os.path.exists(bridge_path)
 
 
 def master_is_openvswitch(devname):
@@ -195,23 +208,24 @@ def is_openvswitch_internal_interface(devname: str) -> bool:
 
 
 def is_netfailover(devname, driver=None):
-    """ netfailover driver uses 3 nics, master, primary and standby.
-        this returns True if the device is either the primary or standby
-        as these devices are to be ignored.
+    """netfailover driver uses 3 nics, master, primary and standby.
+    this returns True if the device is either the primary or standby
+    as these devices are to be ignored.
     """
     if driver is None:
         driver = device_driver(devname)
-    if is_netfail_primary(devname, driver) or is_netfail_standby(devname,
-                                                                 driver):
+    if is_netfail_primary(devname, driver) or is_netfail_standby(
+        devname, driver
+    ):
         return True
     return False
 
 
 def get_dev_features(devname):
-    """ Returns a str from reading /sys/class/net/<devname>/device/features."""
-    features = ''
+    """Returns a str from reading /sys/class/net/<devname>/device/features."""
+    features = ""
     try:
-        features = read_sys_net(devname, 'device/features')
+        features = read_sys_net(devname, "device/features")
     except Exception:
         pass
     return features
@@ -231,13 +245,13 @@ def has_netfail_standby_feature(devname):
 
 
 def is_netfail_master(devname, driver=None):
-    """ A device is a "netfail master" device if:
+    """A device is a "netfail master" device if:
 
-        - The device does NOT have the 'master' sysfs attribute
-        - The device driver is 'virtio_net'
-        - The device has the standby feature bit set
+    - The device does NOT have the 'master' sysfs attribute
+    - The device driver is 'virtio_net'
+    - The device has the standby feature bit set
 
-        Return True if all of the above is True.
+    Return True if all of the above is True.
     """
     if get_master(devname) is not None:
         return False
@@ -255,17 +269,17 @@ def is_netfail_master(devname, driver=None):
 
 
 def is_netfail_primary(devname, driver=None):
-    """ A device is a "netfail primary" device if:
+    """A device is a "netfail primary" device if:
 
-        - the device has a 'master' sysfs file
-        - the device driver is not 'virtio_net'
-        - the 'master' sysfs file points to device with virtio_net driver
-        - the 'master' device has the 'standby' feature bit set
+    - the device has a 'master' sysfs file
+    - the device driver is not 'virtio_net'
+    - the 'master' sysfs file points to device with virtio_net driver
+    - the 'master' device has the 'standby' feature bit set
 
-        Return True if all of the above is True.
+    Return True if all of the above is True.
     """
     # /sys/class/net/<devname>/master -> ../../<master devname>
-    master_sysfs_path = sys_dev_path(devname, path='master')
+    master_sysfs_path = sys_dev_path(devname, path="master")
     if not os.path.exists(master_sysfs_path):
         return False
 
@@ -288,13 +302,13 @@ def is_netfail_primary(devname, driver=None):
 
 
 def is_netfail_standby(devname, driver=None):
-    """ A device is a "netfail standby" device if:
+    """A device is a "netfail standby" device if:
 
-        - The device has a 'master' sysfs attribute
-        - The device driver is 'virtio_net'
-        - The device has the standby feature bit set
+    - The device has a 'master' sysfs attribute
+    - The device driver is 'virtio_net'
+    - The device has the standby feature bit set
 
-        Return True if all of the above is True.
+    Return True if all of the above is True.
     """
     if get_master(devname) is None:
         return False
@@ -320,15 +334,15 @@ def is_renamed(devname):
     #define NET_NAME_USER         3  /* provided by user-space */
     #define NET_NAME_RENAMED      4  /* renamed by user-space */
     """
-    name_assign_type = read_sys_net_safe(devname, 'name_assign_type')
-    if name_assign_type and name_assign_type in ['3', '4']:
+    name_assign_type = read_sys_net_safe(devname, "name_assign_type")
+    if name_assign_type and name_assign_type in ["3", "4"]:
         return True
     return False
 
 
 def is_vlan(devname):
     uevent = str(read_sys_net_safe(devname, "uevent"))
-    return 'DEVTYPE=vlan' in uevent.splitlines()
+    return "DEVTYPE=vlan" in uevent.splitlines()
 
 
 def device_driver(devname):
@@ -372,7 +386,7 @@ class ParserError(Exception):
 def is_disabled_cfg(cfg):
     if not cfg or not isinstance(cfg, dict):
         return False
-    return cfg.get('config') == "disabled"
+    return cfg.get("config") == "disabled"
 
 
 def find_fallback_nic(blacklist_drivers=None):
@@ -386,9 +400,9 @@ def find_fallback_nic(blacklist_drivers=None):
 
 
 def find_fallback_nic_on_netbsd_or_openbsd(blacklist_drivers=None):
-    values = list(sorted(
-        get_interfaces_by_mac().values(),
-        key=natural_sort_key))
+    values = list(
+        sorted(get_interfaces_by_mac().values(), key=natural_sort_key)
+    )
     if values:
         return values[0]
 
@@ -402,7 +416,7 @@ def find_fallback_nic_on_freebsd(blacklist_drivers=None):
 
     we'll use the first interface from ``ifconfig -l -u ether``
     """
-    stdout, _stderr = subp.subp(['ifconfig', '-l', '-u', 'ether'])
+    stdout, _stderr = subp.subp(["ifconfig", "-l", "-u", "ether"])
     values = stdout.split()
     if values:
         return values[0]
@@ -419,22 +433,31 @@ def find_fallback_nic_on_linux(blacklist_drivers=None):
     if not blacklist_drivers:
         blacklist_drivers = []
 
-    if 'net.ifnames=0' in util.get_cmdline():
-        LOG.debug('Stable ifnames disabled by net.ifnames=0 in /proc/cmdline')
+    if "net.ifnames=0" in util.get_cmdline():
+        LOG.debug("Stable ifnames disabled by net.ifnames=0 in /proc/cmdline")
     else:
-        unstable = [device for device in get_devicelist()
-                    if device != 'lo' and not is_renamed(device)]
+        unstable = [
+            device
+            for device in get_devicelist()
+            if device != "lo" and not is_renamed(device)
+        ]
         if len(unstable):
-            LOG.debug('Found unstable nic names: %s; calling udevadm settle',
-                      unstable)
-            msg = 'Waiting for udev events to settle'
+            LOG.debug(
+                "Found unstable nic names: %s; calling udevadm settle",
+                unstable,
+            )
+            msg = "Waiting for udev events to settle"
             util.log_time(LOG.debug, msg, func=util.udevadm_settle)
 
     # get list of interfaces that could have connections
-    invalid_interfaces = set(['lo'])
-    potential_interfaces = set([device for device in get_devicelist()
-                                if device_driver(device) not in
-                                blacklist_drivers])
+    invalid_interfaces = set(["lo"])
+    potential_interfaces = set(
+        [
+            device
+            for device in get_devicelist()
+            if device_driver(device) not in blacklist_drivers
+        ]
+    )
     potential_interfaces = potential_interfaces.difference(invalid_interfaces)
     # sort into interfaces with carrier, interfaces which could have carrier,
     # and ignore interfaces that are definitely disconnected
@@ -452,19 +475,19 @@ def find_fallback_nic_on_linux(blacklist_drivers=None):
         if is_netfailover(interface):
             # ignore netfailover primary/standby interfaces
             continue
-        carrier = read_sys_net_int(interface, 'carrier')
+        carrier = read_sys_net_int(interface, "carrier")
         if carrier:
             connected.append(interface)
             continue
         # check if nic is dormant or down, as this may make a nick appear to
         # not have a carrier even though it could acquire one when brought
         # online by dhclient
-        dormant = read_sys_net_int(interface, 'dormant')
+        dormant = read_sys_net_int(interface, "dormant")
         if dormant:
             possibly_connected.append(interface)
             continue
-        operstate = read_sys_net_safe(interface, 'operstate')
-        if operstate in ['dormant', 'down', 'lowerlayerdown', 'unknown']:
+        operstate = read_sys_net_safe(interface, "operstate")
+        if operstate in ["dormant", "down", "lowerlayerdown", "unknown"]:
             possibly_connected.append(interface)
             continue
 
@@ -484,7 +507,7 @@ def find_fallback_nic_on_linux(blacklist_drivers=None):
 
     # pick the first that has a mac-address
     for name in names:
-        if read_sys_net_safe(name, 'address'):
+        if read_sys_net_safe(name, "address"):
             return name
     return None
 
@@ -501,32 +524,32 @@ def generate_fallback_config(blacklist_drivers=None, config_driver=None):
 
     # netfail cannot use mac for matching, they have duplicate macs
     if is_netfail_master(target_name):
-        match = {'name': target_name}
+        match = {"name": target_name}
     else:
         match = {
-            'macaddress': read_sys_net_safe(target_name, 'address').lower()}
-    cfg = {'dhcp4': True, 'set-name': target_name, 'match': match}
+            "macaddress": read_sys_net_safe(target_name, "address").lower()
+        }
+    cfg = {"dhcp4": True, "set-name": target_name, "match": match}
     if config_driver:
         driver = device_driver(target_name)
         if driver:
-            cfg['match']['driver'] = driver
-    nconf = {'ethernets': {target_name: cfg}, 'version': 2}
+            cfg["match"]["driver"] = driver
+    nconf = {"ethernets": {target_name: cfg}, "version": 2}
     return nconf
 
 
 def extract_physdevs(netcfg):
-
     def _version_1(netcfg):
         physdevs = []
-        for ent in netcfg.get('config', {}):
-            if ent.get('type') != 'physical':
+        for ent in netcfg.get("config", {}):
+            if ent.get("type") != "physical":
                 continue
-            mac = ent.get('mac_address')
+            mac = ent.get("mac_address")
             if not mac:
                 continue
-            name = ent.get('name')
-            driver = ent.get('params', {}).get('driver')
-            device_id = ent.get('params', {}).get('device_id')
+            name = ent.get("name")
+            driver = ent.get("params", {}).get("driver")
+            device_id = ent.get("params", {}).get("device_id")
             if not driver:
                 driver = device_driver(name)
             if not device_id:
@@ -536,17 +559,17 @@ def extract_physdevs(netcfg):
 
     def _version_2(netcfg):
         physdevs = []
-        for ent in netcfg.get('ethernets', {}).values():
+        for ent in netcfg.get("ethernets", {}).values():
             # only rename if configured to do so
-            name = ent.get('set-name')
+            name = ent.get("set-name")
             if not name:
                 continue
             # cloud-init requires macaddress for renaming
-            mac = ent.get('match', {}).get('macaddress')
+            mac = ent.get("match", {}).get("macaddress")
             if not mac:
                 continue
-            driver = ent.get('match', {}).get('driver')
-            device_id = ent.get('match', {}).get('device_id')
+            driver = ent.get("match", {}).get("driver")
+            device_id = ent.get("match", {}).get("device_id")
             if not driver:
                 driver = device_driver(name)
             if not device_id:
@@ -554,13 +577,13 @@ def extract_physdevs(netcfg):
             physdevs.append([mac, name, driver, device_id])
         return physdevs
 
-    version = netcfg.get('version')
+    version = netcfg.get("version")
     if version == 1:
         return _version_1(netcfg)
     elif version == 2:
         return _version_2(netcfg)
 
-    raise RuntimeError('Unknown network config version: %s' % version)
+    raise RuntimeError("Unknown network config version: %s" % version)
 
 
 def apply_network_config_names(netcfg, strict_present=True, strict_busy=True):
@@ -577,7 +600,7 @@ def apply_network_config_names(netcfg, strict_present=True, strict_busy=True):
         _rename_interfaces(extract_physdevs(netcfg))
     except RuntimeError as e:
         raise RuntimeError(
-            'Failed to apply network config names: %s' % e
+            "Failed to apply network config names: %s" % e
         ) from e
 
 
@@ -619,33 +642,37 @@ def _get_current_rename_info(check_downable=True):
     cur_info = {}
     for (name, mac, driver, device_id) in get_interfaces():
         cur_info[name] = {
-            'downable': None,
-            'device_id': device_id,
-            'driver': driver,
-            'mac': mac.lower(),
-            'name': name,
-            'up': is_up(name),
+            "downable": None,
+            "device_id": device_id,
+            "driver": driver,
+            "mac": mac.lower(),
+            "name": name,
+            "up": is_up(name),
         }
 
     if check_downable:
         nmatch = re.compile(r"[0-9]+:\s+(\w+)[@:]")
-        ipv6, _err = subp.subp(['ip', '-6', 'addr', 'show', 'permanent',
-                                'scope', 'global'], capture=True)
-        ipv4, _err = subp.subp(['ip', '-4', 'addr', 'show'], capture=True)
+        ipv6, _err = subp.subp(
+            ["ip", "-6", "addr", "show", "permanent", "scope", "global"],
+            capture=True,
+        )
+        ipv4, _err = subp.subp(["ip", "-4", "addr", "show"], capture=True)
 
         nics_with_addresses = set()
         for bytes_out in (ipv6, ipv4):
             nics_with_addresses.update(nmatch.findall(bytes_out))
 
         for d in cur_info.values():
-            d['downable'] = (d['up'] is False or
-                             d['name'] not in nics_with_addresses)
+            d["downable"] = (
+                d["up"] is False or d["name"] not in nics_with_addresses
+            )
 
     return cur_info
 
 
-def _rename_interfaces(renames, strict_present=True, strict_busy=True,
-                       current_info=None):
+def _rename_interfaces(
+    renames, strict_present=True, strict_busy=True, current_info=None
+):
 
     if not len(renames):
         LOG.debug("no interfaces to rename")
@@ -657,16 +684,15 @@ def _rename_interfaces(renames, strict_present=True, strict_busy=True,
     cur_info = {}
     for name, data in current_info.items():
         cur = data.copy()
-        if cur.get('mac'):
-            cur['mac'] = cur['mac'].lower()
-        cur['name'] = name
+        if cur.get("mac"):
+            cur["mac"] = cur["mac"].lower()
+        cur["name"] = name
         cur_info[name] = cur
 
     LOG.debug("Detected interfaces %s", cur_info)
 
     def update_byname(bymac):
-        return dict((data['name'], data)
-                    for data in cur_info.values())
+        return dict((data["name"], data) for data in cur_info.values())
 
     def rename(cur, new):
         subp.subp(["ip", "link", "set", cur, "name", new], capture=True)
@@ -687,25 +713,31 @@ def _rename_interfaces(renames, strict_present=True, strict_busy=True,
     def entry_match(data, mac, driver, device_id):
         """match if set and in data"""
         if mac and driver and device_id:
-            return (data['mac'] == mac and
-                    data['driver'] == driver and
-                    data['device_id'] == device_id)
+            return (
+                data["mac"] == mac
+                and data["driver"] == driver
+                and data["device_id"] == device_id
+            )
         elif mac and driver:
-            return (data['mac'] == mac and
-                    data['driver'] == driver)
+            return data["mac"] == mac and data["driver"] == driver
         elif mac:
-            return (data['mac'] == mac)
+            return data["mac"] == mac
 
         return False
 
     def find_entry(mac, driver, device_id):
-        match = [data for data in cur_info.values()
-                 if entry_match(data, mac, driver, device_id)]
+        match = [
+            data
+            for data in cur_info.values()
+            if entry_match(data, mac, driver, device_id)
+        ]
         if len(match):
             if len(match) > 1:
-                msg = ('Failed to match a single device. Matched devices "%s"'
-                       ' with search values "(mac:%s driver:%s device_id:%s)"'
-                       % (match, mac, driver, device_id))
+                msg = (
+                    'Failed to match a single device. Matched devices "%s"'
+                    ' with search values "(mac:%s driver:%s device_id:%s)"'
+                    % (match, mac, driver, device_id)
+                )
                 raise ValueError(msg)
             return match[0]
 
@@ -720,10 +752,11 @@ def _rename_interfaces(renames, strict_present=True, strict_busy=True,
             if strict_present:
                 errors.append(
                     "[nic not present] Cannot rename mac=%s to %s"
-                    ", not available." % (mac, new_name))
+                    ", not available." % (mac, new_name)
+                )
             continue
 
-        cur_name = cur.get('name')
+        cur_name = cur.get("name")
         if cur_name == new_name:
             # nothing to do
             continue
@@ -732,24 +765,25 @@ def _rename_interfaces(renames, strict_present=True, strict_busy=True,
             if strict_present:
                 errors.append(
                     "[nic not present] Cannot rename mac=%s to %s"
-                    ", not available." % (mac, new_name))
+                    ", not available." % (mac, new_name)
+                )
             continue
 
-        if cur['up']:
+        if cur["up"]:
             msg = "[busy] Error renaming mac=%s from %s to %s"
-            if not cur['downable']:
+            if not cur["downable"]:
                 if strict_busy:
                     errors.append(msg % (mac, cur_name, new_name))
                 continue
-            cur['up'] = False
+            cur["up"] = False
             cur_ops.append(("down", mac, new_name, (cur_name,)))
             ups.append(("up", mac, new_name, (new_name,)))
 
         if new_name in cur_byname:
             target = cur_byname[new_name]
-            if target['up']:
+            if target["up"]:
                 msg = "[busy-target] Error renaming mac=%s from %s to %s."
-                if not target['downable']:
+                if not target["downable"]:
                     if strict_busy:
                         errors.append(msg % (mac, cur_name, new_name))
                     continue
@@ -762,17 +796,17 @@ def _rename_interfaces(renames, strict_present=True, strict_busy=True,
                 tmp_name = tmpname_fmt % tmpi
 
             cur_ops.append(("rename", mac, new_name, (new_name, tmp_name)))
-            target['name'] = tmp_name
+            target["name"] = tmp_name
             cur_byname = update_byname(cur_info)
-            if target['up']:
+            if target["up"]:
                 ups.append(("up", mac, new_name, (tmp_name,)))
 
-        cur_ops.append(("rename", mac, new_name, (cur['name'], new_name)))
-        cur['name'] = new_name
+        cur_ops.append(("rename", mac, new_name, (cur["name"], new_name)))
+        cur["name"] = new_name
         cur_byname = update_byname(cur_info)
         ops += cur_ops
 
-    opmap = {'rename': rename, 'down': down, 'up': up}
+    opmap = {"rename": rename, "down": down, "up": up}
 
     if len(ops) + len(ups) == 0:
         if len(errors):
@@ -787,11 +821,12 @@ def _rename_interfaces(renames, strict_present=True, strict_busy=True,
                 opmap.get(op)(*params)
             except Exception as e:
                 errors.append(
-                    "[unknown] Error performing %s%s for %s, %s: %s" %
-                    (op, params, mac, new_name, e))
+                    "[unknown] Error performing %s%s for %s, %s: %s"
+                    % (op, params, mac, new_name, e)
+                )
 
     if len(errors):
-        raise Exception('\n'.join(errors))
+        raise Exception("\n".join(errors))
 
 
 def get_interface_mac(ifname):
@@ -810,7 +845,7 @@ def get_ib_interface_hwaddr(ifname, ethernet_format):
     representation of the address will be returned.
     """
     # Type 32 is Infiniband.
-    if read_sys_net_safe(ifname, 'type') == '32':
+    if read_sys_net_safe(ifname, "type") == "32":
         mac = get_interface_mac(ifname)
         if mac and ethernet_format:
             # Use bytes 13-15 and 18-20 of the hardware address.
@@ -821,26 +856,30 @@ def get_ib_interface_hwaddr(ifname, ethernet_format):
 def get_interfaces_by_mac(blacklist_drivers=None) -> dict:
     if util.is_FreeBSD() or util.is_DragonFlyBSD():
         return get_interfaces_by_mac_on_freebsd(
-            blacklist_drivers=blacklist_drivers)
+            blacklist_drivers=blacklist_drivers
+        )
     elif util.is_NetBSD():
         return get_interfaces_by_mac_on_netbsd(
-            blacklist_drivers=blacklist_drivers)
+            blacklist_drivers=blacklist_drivers
+        )
     elif util.is_OpenBSD():
         return get_interfaces_by_mac_on_openbsd(
-            blacklist_drivers=blacklist_drivers)
+            blacklist_drivers=blacklist_drivers
+        )
     else:
         return get_interfaces_by_mac_on_linux(
-            blacklist_drivers=blacklist_drivers)
+            blacklist_drivers=blacklist_drivers
+        )
 
 
 def get_interfaces_by_mac_on_freebsd(blacklist_drivers=None) -> dict():
-    (out, _) = subp.subp(['ifconfig', '-a', 'ether'])
+    (out, _) = subp.subp(["ifconfig", "-a", "ether"])
 
     # flatten each interface block in a single line
     def flatten(out):
-        curr_block = ''
-        for line in out.split('\n'):
-            if line.startswith('\t'):
+        curr_block = ""
+        for line in out.split("\n"):
+            if line.startswith("\t"):
                 curr_block += line
             else:
                 if curr_block:
@@ -852,10 +891,11 @@ def get_interfaces_by_mac_on_freebsd(blacklist_drivers=None) -> dict():
     def find_mac(flat_list):
         for block in flat_list:
             m = re.search(
-                r"^(?P<ifname>\S*): .*ether\s(?P<mac>[\da-f:]{17}).*",
-                block)
+                r"^(?P<ifname>\S*): .*ether\s(?P<mac>[\da-f:]{17}).*", block
+            )
             if m:
-                yield (m.group('mac'), m.group('ifname'))
+                yield (m.group("mac"), m.group("ifname"))
+
     results = {mac: ifname for mac, ifname in find_mac(flatten(out))}
     return results
 
@@ -866,13 +906,13 @@ def get_interfaces_by_mac_on_netbsd(blacklist_drivers=None) -> dict():
         r"(?P<ifname>\w+).*address:\s"
         r"(?P<mac>([\da-f]{2}[:-]){5}([\da-f]{2})).*"
     )
-    (out, _) = subp.subp(['ifconfig', '-a'])
-    if_lines = re.sub(r'\n\s+', ' ', out).splitlines()
+    (out, _) = subp.subp(["ifconfig", "-a"])
+    if_lines = re.sub(r"\n\s+", " ", out).splitlines()
     for line in if_lines:
         m = re.match(re_field_match, line)
         if m:
             fields = m.groupdict()
-            ret[fields['mac']] = fields['ifname']
+            ret[fields["mac"]] = fields["ifname"]
     return ret
 
 
@@ -880,14 +920,15 @@ def get_interfaces_by_mac_on_openbsd(blacklist_drivers=None) -> dict():
     ret = {}
     re_field_match = (
         r"(?P<ifname>\w+).*lladdr\s"
-        r"(?P<mac>([\da-f]{2}[:-]){5}([\da-f]{2})).*")
-    (out, _) = subp.subp(['ifconfig', '-a'])
-    if_lines = re.sub(r'\n\s+', ' ', out).splitlines()
+        r"(?P<mac>([\da-f]{2}[:-]){5}([\da-f]{2})).*"
+    )
+    (out, _) = subp.subp(["ifconfig", "-a"])
+    if_lines = re.sub(r"\n\s+", " ", out).splitlines()
     for line in if_lines:
         m = re.match(re_field_match, line)
         if m:
             fields = m.groupdict()
-            ret[fields['mac']] = fields['ifname']
+            ret[fields["mac"]] = fields["ifname"]
     return ret
 
 
@@ -897,11 +938,13 @@ def get_interfaces_by_mac_on_linux(blacklist_drivers=None) -> dict:
     Bridges and any devices that have a 'stolen' mac are excluded."""
     ret = {}
     for name, mac, _driver, _devid in get_interfaces(
-            blacklist_drivers=blacklist_drivers):
+        blacklist_drivers=blacklist_drivers
+    ):
         if mac in ret:
             raise RuntimeError(
-                "duplicate mac found! both '%s' and '%s' have mac '%s'" %
-                (name, ret[mac], mac))
+                "duplicate mac found! both '%s' and '%s' have mac '%s'"
+                % (name, ret[mac], mac)
+            )
         ret[mac] = name
         # Try to get an Infiniband hardware address (in 6 byte Ethernet format)
         # for the interface.
@@ -909,8 +952,9 @@ def get_interfaces_by_mac_on_linux(blacklist_drivers=None) -> dict:
         if ib_mac:
             if ib_mac in ret:
                 raise RuntimeError(
-                    "duplicate mac found! both '%s' and '%s' have mac '%s'" %
-                    (name, ret[ib_mac], ib_mac))
+                    "duplicate mac found! both '%s' and '%s' have mac '%s'"
+                    % (name, ret[ib_mac], ib_mac)
+                )
             ret[ib_mac] = name
     return ret
 
@@ -924,7 +968,7 @@ def get_interfaces(blacklist_drivers=None) -> list:
         blacklist_drivers = []
     devs = get_devicelist()
     # 16 somewhat arbitrarily chosen.  Normally a mac is 6 '00:' tokens.
-    zero_mac = ':'.join(('00',) * 16)
+    zero_mac = ":".join(("00",) * 16)
     for name in devs:
         if not interface_has_own_mac(name):
             continue
@@ -935,8 +979,9 @@ def get_interfaces(blacklist_drivers=None) -> list:
         if is_bond(name):
             continue
         if get_master(name) is not None:
-            if (not master_is_bridge_or_bond(name) and
-                    not master_is_openvswitch(name)):
+            if not master_is_bridge_or_bond(
+                name
+            ) and not master_is_openvswitch(name):
                 continue
         if is_netfailover(name):
             continue
@@ -945,7 +990,7 @@ def get_interfaces(blacklist_drivers=None) -> list:
         if not mac:
             continue
         # skip nics that have no mac (00:00....)
-        if name != 'lo' and mac == zero_mac[:len(mac)]:
+        if name != "lo" and mac == zero_mac[: len(mac)]:
             continue
         if is_openvswitch_internal_interface(name):
             continue
@@ -966,8 +1011,9 @@ def get_ib_hwaddrs_by_interface():
         if ib_mac:
             if ib_mac in ret:
                 raise RuntimeError(
-                    "duplicate mac found! both '%s' and '%s' have mac '%s'" %
-                    (name, ret[ib_mac], ib_mac))
+                    "duplicate mac found! both '%s' and '%s' have mac '%s'"
+                    % (name, ret[ib_mac], ib_mac)
+                )
             ret[name] = ib_mac
     return ret
 
@@ -985,18 +1031,21 @@ def has_url_connectivity(url_data: Dict[str, Any]) -> bool:
         "timeout": 10
     })
     """
-    if 'url' not in url_data:
+    if "url" not in url_data:
         LOG.warning(
-            "Ignoring connectivity check. No 'url' to check in %s", url_data)
+            "Ignoring connectivity check. No 'url' to check in %s", url_data
+        )
         return False
-    url = url_data['url']
-    if not any([url.startswith('http://'), url.startswith('https://')]):
+    url = url_data["url"]
+    if not any([url.startswith("http://"), url.startswith("https://")]):
         LOG.warning(
             "Ignoring connectivity check. Expected URL beginning with http*://"
-            " received '%s'", url)
+            " received '%s'",
+            url,
+        )
         return False
-    if 'timeout' not in url_data:
-        url_data['timeout'] = 5
+    if "timeout" not in url_data:
+        url_data["timeout"] = 5
     try:
         readurl(**url_data)
     except UrlError:
@@ -1047,9 +1096,16 @@ class EphemeralIPv4Network(object):
     context exit, clean up the interface leaving no configuration behind.
     """
 
-    def __init__(self, interface, ip, prefix_or_mask, broadcast, router=None,
-                 connectivity_url_data: Dict[str, Any] = None,
-                 static_routes=None):
+    def __init__(
+        self,
+        interface,
+        ip,
+        prefix_or_mask,
+        broadcast,
+        router=None,
+        connectivity_url_data: Dict[str, Any] = None,
+        static_routes=None,
+    ):
         """Setup context manager and validate call signature.
 
         @param interface: Name of the network interface to bring up.
@@ -1064,14 +1120,14 @@ class EphemeralIPv4Network(object):
         """
         if not all([interface, ip, prefix_or_mask, broadcast]):
             raise ValueError(
-                'Cannot init network on {0} with {1}/{2} and bcast {3}'.format(
-                    interface, ip, prefix_or_mask, broadcast))
+                "Cannot init network on {0} with {1}/{2} and bcast {3}".format(
+                    interface, ip, prefix_or_mask, broadcast
+                )
+            )
         try:
             self.prefix = mask_to_net_prefix(prefix_or_mask)
         except ValueError as e:
-            raise ValueError(
-                'Cannot setup network: {0}'.format(e)
-            ) from e
+            raise ValueError("Cannot setup network: {0}".format(e)) from e
 
         self.connectivity_url_data = connectivity_url_data
         self.interface = interface
@@ -1086,8 +1142,10 @@ class EphemeralIPv4Network(object):
         if self.connectivity_url_data:
             if has_url_connectivity(self.connectivity_url_data):
                 LOG.debug(
-                    'Skip ephemeral network setup, instance has connectivity'
-                    ' to %s', self.connectivity_url_data['url'])
+                    "Skip ephemeral network setup, instance has connectivity"
+                    " to %s",
+                    self.connectivity_url_data["url"],
+                )
                 return
 
         self._bringup_device()
@@ -1116,38 +1174,92 @@ class EphemeralIPv4Network(object):
     def _delete_address(self, address, prefix):
         """Perform the ip command to remove the specified address."""
         subp.subp(
-            ['ip', '-family', 'inet', 'addr', 'del',
-             '%s/%s' % (address, prefix), 'dev', self.interface],
-            capture=True)
+            [
+                "ip",
+                "-family",
+                "inet",
+                "addr",
+                "del",
+                "%s/%s" % (address, prefix),
+                "dev",
+                self.interface,
+            ],
+            capture=True,
+        )
 
     def _bringup_device(self):
         """Perform the ip comands to fully setup the device."""
-        cidr = '{0}/{1}'.format(self.ip, self.prefix)
+        cidr = "{0}/{1}".format(self.ip, self.prefix)
         LOG.debug(
-            'Attempting setup of ephemeral network on %s with %s brd %s',
-            self.interface, cidr, self.broadcast)
+            "Attempting setup of ephemeral network on %s with %s brd %s",
+            self.interface,
+            cidr,
+            self.broadcast,
+        )
         try:
             subp.subp(
-                ['ip', '-family', 'inet', 'addr', 'add', cidr, 'broadcast',
-                 self.broadcast, 'dev', self.interface],
-                capture=True, update_env={'LANG': 'C'})
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "add",
+                    cidr,
+                    "broadcast",
+                    self.broadcast,
+                    "dev",
+                    self.interface,
+                ],
+                capture=True,
+                update_env={"LANG": "C"},
+            )
         except subp.ProcessExecutionError as e:
             if "File exists" not in e.stderr:
                 raise
             LOG.debug(
-                'Skip ephemeral network setup, %s already has address %s',
-                self.interface, self.ip)
+                "Skip ephemeral network setup, %s already has address %s",
+                self.interface,
+                self.ip,
+            )
         else:
             # Address creation success, bring up device and queue cleanup
             subp.subp(
-                ['ip', '-family', 'inet', 'link', 'set', 'dev', self.interface,
-                 'up'], capture=True)
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "link",
+                    "set",
+                    "dev",
+                    self.interface,
+                    "up",
+                ],
+                capture=True,
+            )
             self.cleanup_cmds.append(
-                ['ip', '-family', 'inet', 'link', 'set', 'dev', self.interface,
-                 'down'])
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "link",
+                    "set",
+                    "dev",
+                    self.interface,
+                    "down",
+                ]
+            )
             self.cleanup_cmds.append(
-                ['ip', '-family', 'inet', 'addr', 'del', cidr, 'dev',
-                 self.interface])
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "del",
+                    cidr,
+                    "dev",
+                    self.interface,
+                ]
+            )
 
     def _bringup_static_routes(self):
         # static_routes = [("169.254.169.254/32", "130.56.248.255"),
@@ -1155,35 +1267,76 @@ class EphemeralIPv4Network(object):
         for net_address, gateway in self.static_routes:
             via_arg = []
             if gateway != "0.0.0.0":
-                via_arg = ['via', gateway]
+                via_arg = ["via", gateway]
             subp.subp(
-                ['ip', '-4', 'route', 'append', net_address] + via_arg +
-                ['dev', self.interface], capture=True)
+                ["ip", "-4", "route", "append", net_address]
+                + via_arg
+                + ["dev", self.interface],
+                capture=True,
+            )
             self.cleanup_cmds.insert(
-                0, ['ip', '-4', 'route', 'del', net_address] + via_arg +
-                   ['dev', self.interface])
+                0,
+                ["ip", "-4", "route", "del", net_address]
+                + via_arg
+                + ["dev", self.interface],
+            )
 
     def _bringup_router(self):
         """Perform the ip commands to fully setup the router if needed."""
         # Check if a default route exists and exit if it does
-        out, _ = subp.subp(['ip', 'route', 'show', '0.0.0.0/0'], capture=True)
-        if 'default' in out:
+        out, _ = subp.subp(["ip", "route", "show", "0.0.0.0/0"], capture=True)
+        if "default" in out:
             LOG.debug(
-                'Skip ephemeral route setup. %s already has default route: %s',
-                self.interface, out.strip())
+                "Skip ephemeral route setup. %s already has default route: %s",
+                self.interface,
+                out.strip(),
+            )
             return
         subp.subp(
-            ['ip', '-4', 'route', 'add', self.router, 'dev', self.interface,
-             'src', self.ip], capture=True)
+            [
+                "ip",
+                "-4",
+                "route",
+                "add",
+                self.router,
+                "dev",
+                self.interface,
+                "src",
+                self.ip,
+            ],
+            capture=True,
+        )
         self.cleanup_cmds.insert(
             0,
-            ['ip', '-4', 'route', 'del', self.router, 'dev', self.interface,
-             'src', self.ip])
+            [
+                "ip",
+                "-4",
+                "route",
+                "del",
+                self.router,
+                "dev",
+                self.interface,
+                "src",
+                self.ip,
+            ],
+        )
         subp.subp(
-            ['ip', '-4', 'route', 'add', 'default', 'via', self.router,
-             'dev', self.interface], capture=True)
+            [
+                "ip",
+                "-4",
+                "route",
+                "add",
+                "default",
+                "via",
+                self.router,
+                "dev",
+                self.interface,
+            ],
+            capture=True,
+        )
         self.cleanup_cmds.insert(
-            0, ['ip', '-4', 'route', 'del', 'default', 'dev', self.interface])
+            0, ["ip", "-4", "route", "del", "default", "dev", self.interface]
+        )
 
 
 class RendererNotFoundError(RuntimeError):
diff --git a/cloudinit/net/activators.py b/cloudinit/net/activators.py
index 137338d8..e80c26df 100644
--- a/cloudinit/net/activators.py
+++ b/cloudinit/net/activators.py
@@ -4,15 +4,13 @@ import os
 from abc import ABC, abstractmethod
 from typing import Iterable, List, Type
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from cloudinit.net.eni import available as eni_available
 from cloudinit.net.netplan import available as netplan_available
-from cloudinit.net.networkd import available as networkd_available
 from cloudinit.net.network_state import NetworkState
+from cloudinit.net.networkd import available as networkd_available
 from cloudinit.net.sysconfig import NM_CFG_FILE
 
-
 LOG = logging.getLogger(__name__)
 
 
@@ -25,8 +23,7 @@ def _alter_interface(cmd, device_name) -> bool:
     try:
         (_out, err) = subp.subp(cmd)
         if len(err):
-            LOG.warning("Running %s resulted in stderr output: %s",
-                        cmd, err)
+            LOG.warning("Running %s resulted in stderr output: %s", cmd, err)
         return True
     except subp.ProcessExecutionError:
         util.logexc(LOG, "Running interface command %s failed", cmd)
@@ -73,7 +70,7 @@ class NetworkActivator(ABC):
         Return True is successful, otherwise return False
         """
         return cls.bring_up_interfaces(
-            [i['name'] for i in network_state.iter_interfaces()]
+            [i["name"] for i in network_state.iter_interfaces()]
         )
 
     @classmethod
@@ -91,7 +88,7 @@ class NetworkActivator(ABC):
         Return True is successful, otherwise return False
         """
         return cls.bring_down_interfaces(
-            [i['name'] for i in network_state.iter_interfaces()]
+            [i["name"] for i in network_state.iter_interfaces()]
         )
 
 
@@ -111,7 +108,7 @@ class IfUpDownActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        cmd = ['ifup', device_name]
+        cmd = ["ifup", device_name]
         return _alter_interface(cmd, device_name)
 
     @staticmethod
@@ -120,18 +117,18 @@ class IfUpDownActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        cmd = ['ifdown', device_name]
+        cmd = ["ifdown", device_name]
         return _alter_interface(cmd, device_name)
 
 
 class NetworkManagerActivator(NetworkActivator):
     @staticmethod
     def available(target=None) -> bool:
-        """ Return true if network manager can be used on this system."""
+        """Return true if network manager can be used on this system."""
         config_present = os.path.isfile(
             subp.target_path(target, path=NM_CFG_FILE)
         )
-        nmcli_present = subp.which('nmcli', target=target)
+        nmcli_present = subp.which("nmcli", target=target)
         return config_present and bool(nmcli_present)
 
     @staticmethod
@@ -140,7 +137,7 @@ class NetworkManagerActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        cmd = ['nmcli', 'connection', 'up', 'ifname', device_name]
+        cmd = ["nmcli", "connection", "up", "ifname", device_name]
         return _alter_interface(cmd, device_name)
 
     @staticmethod
@@ -149,16 +146,16 @@ class NetworkManagerActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        cmd = ['nmcli', 'connection', 'down', device_name]
+        cmd = ["nmcli", "connection", "down", device_name]
         return _alter_interface(cmd, device_name)
 
 
 class NetplanActivator(NetworkActivator):
-    NETPLAN_CMD = ['netplan', 'apply']
+    NETPLAN_CMD = ["netplan", "apply"]
 
     @staticmethod
     def available(target=None) -> bool:
-        """ Return true if netplan can be used on this system."""
+        """Return true if netplan can be used on this system."""
         return netplan_available(target=target)
 
     @staticmethod
@@ -167,9 +164,11 @@ class NetplanActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        LOG.debug("Calling 'netplan apply' rather than "
-                  "altering individual interfaces")
-        return _alter_interface(NetplanActivator.NETPLAN_CMD, 'all')
+        LOG.debug(
+            "Calling 'netplan apply' rather than "
+            "altering individual interfaces"
+        )
+        return _alter_interface(NetplanActivator.NETPLAN_CMD, "all")
 
     @staticmethod
     def bring_up_interfaces(device_names: Iterable[str]) -> bool:
@@ -177,9 +176,11 @@ class NetplanActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        LOG.debug("Calling 'netplan apply' rather than "
-                  "altering individual interfaces")
-        return _alter_interface(NetplanActivator.NETPLAN_CMD, 'all')
+        LOG.debug(
+            "Calling 'netplan apply' rather than "
+            "altering individual interfaces"
+        )
+        return _alter_interface(NetplanActivator.NETPLAN_CMD, "all")
 
     @staticmethod
     def bring_up_all_interfaces(network_state: NetworkState) -> bool:
@@ -187,7 +188,7 @@ class NetplanActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        return _alter_interface(NetplanActivator.NETPLAN_CMD, 'all')
+        return _alter_interface(NetplanActivator.NETPLAN_CMD, "all")
 
     @staticmethod
     def bring_down_interface(device_name: str) -> bool:
@@ -195,9 +196,11 @@ class NetplanActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        LOG.debug("Calling 'netplan apply' rather than "
-                  "altering individual interfaces")
-        return _alter_interface(NetplanActivator.NETPLAN_CMD, 'all')
+        LOG.debug(
+            "Calling 'netplan apply' rather than "
+            "altering individual interfaces"
+        )
+        return _alter_interface(NetplanActivator.NETPLAN_CMD, "all")
 
     @staticmethod
     def bring_down_interfaces(device_names: Iterable[str]) -> bool:
@@ -205,9 +208,11 @@ class NetplanActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        LOG.debug("Calling 'netplan apply' rather than "
-                  "altering individual interfaces")
-        return _alter_interface(NetplanActivator.NETPLAN_CMD, 'all')
+        LOG.debug(
+            "Calling 'netplan apply' rather than "
+            "altering individual interfaces"
+        )
+        return _alter_interface(NetplanActivator.NETPLAN_CMD, "all")
 
     @staticmethod
     def bring_down_all_interfaces(network_state: NetworkState) -> bool:
@@ -215,7 +220,7 @@ class NetplanActivator(NetworkActivator):
 
         Return True is successful, otherwise return False
         """
-        return _alter_interface(NetplanActivator.NETPLAN_CMD, 'all')
+        return _alter_interface(NetplanActivator.NETPLAN_CMD, "all")
 
 
 class NetworkdActivator(NetworkActivator):
@@ -226,20 +231,20 @@ class NetworkdActivator(NetworkActivator):
 
     @staticmethod
     def bring_up_interface(device_name: str) -> bool:
-        """ Return True is successful, otherwise return False """
-        cmd = ['ip', 'link', 'set', 'up', device_name]
+        """Return True is successful, otherwise return False"""
+        cmd = ["ip", "link", "set", "up", device_name]
         return _alter_interface(cmd, device_name)
 
     @staticmethod
     def bring_up_all_interfaces(network_state: NetworkState) -> bool:
-        """ Return True is successful, otherwise return False """
-        cmd = ['systemctl', 'restart', 'systemd-networkd', 'systemd-resolved']
-        return _alter_interface(cmd, 'all')
+        """Return True is successful, otherwise return False"""
+        cmd = ["systemctl", "restart", "systemd-networkd", "systemd-resolved"]
+        return _alter_interface(cmd, "all")
 
     @staticmethod
     def bring_down_interface(device_name: str) -> bool:
-        """ Return True is successful, otherwise return False """
-        cmd = ['ip', 'link', 'set', 'down', device_name]
+        """Return True is successful, otherwise return False"""
+        cmd = ["ip", "link", "set", "down", device_name]
         return _alter_interface(cmd, device_name)
 
 
@@ -262,7 +267,8 @@ def search_activator(
     unknown = [i for i in priority if i not in DEFAULT_PRIORITY]
     if unknown:
         raise ValueError(
-            "Unknown activators provided in priority list: %s" % unknown)
+            "Unknown activators provided in priority list: %s" % unknown
+        )
 
     return [activator for activator in priority if activator.available(target)]
 
@@ -277,7 +283,8 @@ def select_activator(priority=None, target=None) -> Type[NetworkActivator]:
             tmsg = " in target=%s" % target
         raise NoActivatorException(
             "No available network activators found%s. Searched "
-            "through list: %s" % (tmsg, priority))
+            "through list: %s" % (tmsg, priority)
+        )
     selected = found[0]
-    LOG.debug('Using selected activator: %s', selected)
+    LOG.debug("Using selected activator: %s", selected)
     return selected
diff --git a/cloudinit/net/bsd.py b/cloudinit/net/bsd.py
index 916cea32..dc322582 100644
--- a/cloudinit/net/bsd.py
+++ b/cloudinit/net/bsd.py
@@ -3,11 +3,9 @@
 import re
 
 from cloudinit import log as logging
-from cloudinit import net
-from cloudinit import util
-from cloudinit import subp
-from cloudinit.distros.parsers.resolv_conf import ResolvConf
+from cloudinit import net, subp, util
 from cloudinit.distros import bsd_utils
+from cloudinit.distros.parsers.resolv_conf import ResolvConf
 
 from . import renderer
 
@@ -15,8 +13,8 @@ LOG = logging.getLogger(__name__)
 
 
 class BSDRenderer(renderer.Renderer):
-    resolv_conf_fn = 'etc/resolv.conf'
-    rc_conf_fn = 'etc/rc.conf'
+    resolv_conf_fn = "etc/resolv.conf"
+    rc_conf_fn = "etc/rc.conf"
 
     def get_rc_config_value(self, key):
         fn = subp.target_path(self.target, self.rc_conf_fn)
@@ -31,52 +29,59 @@ class BSDRenderer(renderer.Renderer):
             config = {}
         self.target = None
         self.interface_configurations = {}
-        self._postcmds = config.get('postcmds', True)
+        self._postcmds = config.get("postcmds", True)
 
     def _ifconfig_entries(self, settings):
         ifname_by_mac = net.get_interfaces_by_mac()
         for interface in settings.iter_interfaces():
             device_name = interface.get("name")
             device_mac = interface.get("mac_address")
-            if device_name and re.match(r'^lo\d+$', device_name):
+            if device_name and re.match(r"^lo\d+$", device_name):
                 continue
             if device_mac not in ifname_by_mac:
-                LOG.info('Cannot find any device with MAC %s', device_mac)
+                LOG.info("Cannot find any device with MAC %s", device_mac)
             elif device_mac and device_name:
                 cur_name = ifname_by_mac[device_mac]
                 if cur_name != device_name:
-                    LOG.info('netif service will rename interface %s to %s',
-                             cur_name, device_name)
+                    LOG.info(
+                        "netif service will rename interface %s to %s",
+                        cur_name,
+                        device_name,
+                    )
                     try:
                         self.rename_interface(cur_name, device_name)
                     except NotImplementedError:
-                        LOG.error((
-                            'Interface renaming is '
-                            'not supported on this OS'))
+                        LOG.error(
+                            "Interface renaming is not supported on this OS"
+                        )
                         device_name = cur_name
 
             else:
                 device_name = ifname_by_mac[device_mac]
 
-            LOG.info('Configuring interface %s', device_name)
+            LOG.info("Configuring interface %s", device_name)
 
-            self.interface_configurations[device_name] = 'DHCP'
+            self.interface_configurations[device_name] = "DHCP"
 
             for subnet in interface.get("subnets", []):
-                if subnet.get('type') == 'static':
-                    if not subnet.get('netmask'):
+                if subnet.get("type") == "static":
+                    if not subnet.get("netmask"):
                         LOG.debug(
-                            'Skipping IP %s, because there is no netmask',
-                            subnet.get('address')
+                            "Skipping IP %s, because there is no netmask",
+                            subnet.get("address"),
                         )
                         continue
-                    LOG.debug('Configuring dev %s with %s / %s', device_name,
-                              subnet.get('address'), subnet.get('netmask'))
+                    LOG.debug(
+                        "Configuring dev %s with %s / %s",
+                        device_name,
+                        subnet.get("address"),
+                        subnet.get("netmask"),
+                    )
 
                     self.interface_configurations[device_name] = {
-                        'address': subnet.get('address'),
-                        'netmask': subnet.get('netmask'),
-                        'mtu': subnet.get('mtu') or interface.get('mtu'),
+                        "address": subnet.get("address"),
+                        "netmask": subnet.get("netmask"),
+                        "mtu": subnet.get("mtu") or interface.get("mtu"),
                     }
 
     def _route_entries(self, settings):
@@ -84,22 +89,25 @@ class BSDRenderer(renderer.Renderer):
         for interface in settings.iter_interfaces():
             subnets = interface.get("subnets", [])
             for subnet in subnets:
-                if subnet.get('type') != 'static':
+                if subnet.get("type") != "static":
                     continue
-                gateway = subnet.get('gateway')
-                if gateway and len(gateway.split('.')) == 4:
-                    routes.append({
-                        'network': '0.0.0.0',
-                        'netmask': '0.0.0.0',
-                        'gateway': gateway})
-                routes += subnet.get('routes', [])
+                gateway = subnet.get("gateway")
+                if gateway and len(gateway.split(".")) == 4:
+                    routes.append(
+                        {
+                            "network": "0.0.0.0",
+                            "netmask": "0.0.0.0",
+                            "gateway": gateway,
+                        }
+                    )
+                routes += subnet.get("routes", [])
         for route in routes:
-            network = route.get('network')
+            network = route.get("network")
             if not network:
-                LOG.debug('Skipping a bad route entry')
+                LOG.debug("Skipping a bad route entry")
                 continue
-            netmask = route.get('netmask')
-            gateway = route.get('gateway')
+            netmask = route.get("netmask")
+            gateway = route.get("gateway")
             self.set_route(network, netmask, gateway)
 
     def _resolve_conf(self, settings):
@@ -107,20 +115,26 @@ class BSDRenderer(renderer.Renderer):
         searchdomains = settings.dns_searchdomains
         for interface in settings.iter_interfaces():
             for subnet in interface.get("subnets", []):
-                if 'dns_nameservers' in subnet:
-                    nameservers.extend(subnet['dns_nameservers'])
-                if 'dns_search' in subnet:
-                    searchdomains.extend(subnet['dns_search'])
+                if "dns_nameservers" in subnet:
+                    nameservers.extend(subnet["dns_nameservers"])
+                if "dns_search" in subnet:
+                    searchdomains.extend(subnet["dns_search"])
         # Try to read the /etc/resolv.conf or just start from scratch if that
         # fails.
         try:
-            resolvconf = ResolvConf(util.load_file(subp.target_path(
-                self.target, self.resolv_conf_fn)))
+            resolvconf = ResolvConf(
+                util.load_file(
+                    subp.target_path(self.target, self.resolv_conf_fn)
+                )
+            )
             resolvconf.parse()
         except IOError:
-            util.logexc(LOG, "Failed to parse %s, use new empty file",
-                        subp.target_path(self.target, self.resolv_conf_fn))
-            resolvconf = ResolvConf('')
+            util.logexc(
+                LOG,
+                "Failed to parse %s, use new empty file",
+                subp.target_path(self.target, self.resolv_conf_fn),
+            )
+            resolvconf = ResolvConf("")
             resolvconf.parse()
 
         # Add some nameservers
@@ -138,7 +152,9 @@ class BSDRenderer(renderer.Renderer):
                 util.logexc(LOG, "Failed to add search domain %s", domain)
         util.write_file(
             subp.target_path(self.target, self.resolv_conf_fn),
-            str(resolvconf), 0o644)
+            str(resolvconf),
+            0o644,
+        )
 
     def render_network_state(self, network_state, templates=None, target=None):
         if target:
@@ -152,7 +168,7 @@ class BSDRenderer(renderer.Renderer):
 
     def dhcp_interfaces(self):
         ic = self.interface_configurations.items
-        return [k for k, v in ic() if v == 'DHCP']
+        return [k for k, v in ic() if v == "DHCP"]
 
     def start_services(self, run=False):
         raise NotImplementedError()
diff --git a/cloudinit/net/cmdline.py b/cloudinit/net/cmdline.py
index 7cdd428d..eab86d9f 100755
--- a/cloudinit/net/cmdline.py
+++ b/cloudinit/net/cmdline.py
@@ -16,8 +16,7 @@ import shlex
 
 from cloudinit import util
 
-from . import get_devicelist
-from . import read_sys_net_safe
+from . import get_devicelist, read_sys_net_safe
 
 _OPEN_ISCSI_INTERFACE_FILE = "/run/initramfs/open-iscsi.interface"
 
@@ -58,7 +57,7 @@ class KlibcNetworkConfigSource(InitramfsNetworkConfigSource):
         if self._mac_addrs is None:
             self._mac_addrs = {}
             for k in get_devicelist():
-                mac_addr = read_sys_net_safe(k, 'address')
+                mac_addr = read_sys_net_safe(k, "address")
                 if mac_addr:
                     self._mac_addrs[k] = mac_addr
 
@@ -74,7 +73,7 @@ class KlibcNetworkConfigSource(InitramfsNetworkConfigSource):
         """
         if self._files:
             for item in shlex.split(self._cmdline):
-                if item.startswith('ip=') or item.startswith('ip6='):
+                if item.startswith("ip=") or item.startswith("ip6="):
                     return True
             if os.path.exists(_OPEN_ISCSI_INTERFACE_FILE):
                 # iBft can configure networking without ip=
@@ -83,7 +82,8 @@ class KlibcNetworkConfigSource(InitramfsNetworkConfigSource):
 
     def render_config(self) -> dict:
         return config_from_klibc_net_cfg(
-            files=self._files, mac_addrs=self._mac_addrs,
+            files=self._files,
+            mac_addrs=self._mac_addrs,
         )
 
 
@@ -113,78 +113,78 @@ def _klibc_to_config_entry(content, mac_addrs=None):
 
     data = util.load_shell_content(content)
     try:
-        name = data['DEVICE'] if 'DEVICE' in data else data['DEVICE6']
+        name = data["DEVICE"] if "DEVICE" in data else data["DEVICE6"]
     except KeyError as e:
         raise ValueError("no 'DEVICE' or 'DEVICE6' entry in data") from e
 
     # ipconfig on precise does not write PROTO
     # IPv6 config gives us IPV6PROTO, not PROTO.
-    proto = data.get('PROTO', data.get('IPV6PROTO'))
+    proto = data.get("PROTO", data.get("IPV6PROTO"))
     if not proto:
-        if data.get('filename'):
-            proto = 'dhcp'
+        if data.get("filename"):
+            proto = "dhcp"
         else:
-            proto = 'none'
+            proto = "none"
 
-    if proto not in ('none', 'dhcp', 'dhcp6'):
+    if proto not in ("none", "dhcp", "dhcp6"):
         raise ValueError("Unexpected value for PROTO: %s" % proto)
 
     iface = {
-        'type': 'physical',
-        'name': name,
-        'subnets': [],
+        "type": "physical",
+        "name": name,
+        "subnets": [],
     }
 
     if name in mac_addrs:
-        iface['mac_address'] = mac_addrs[name]
+        iface["mac_address"] = mac_addrs[name]
 
     # Handle both IPv4 and IPv6 values
-    for pre in ('IPV4', 'IPV6'):
+    for pre in ("IPV4", "IPV6"):
         # if no IPV4ADDR or IPV6ADDR, then go on.
         if pre + "ADDR" not in data:
             continue
 
         # PROTO for ipv4, IPV6PROTO for ipv6
-        cur_proto = data.get(pre + 'PROTO', proto)
+        cur_proto = data.get(pre + "PROTO", proto)
         # ipconfig's 'none' is called 'static'
-        if cur_proto == 'none':
-            cur_proto = 'static'
-        subnet = {'type': cur_proto, 'control': 'manual'}
+        if cur_proto == "none":
+            cur_proto = "static"
+        subnet = {"type": cur_proto, "control": "manual"}
 
         # only populate address for static types. While the rendered config
         # may have an address for dhcp, that is not really expected.
-        if cur_proto == 'static':
-            subnet['address'] = data[pre + 'ADDR']
+        if cur_proto == "static":
+            subnet["address"] = data[pre + "ADDR"]
 
         # these fields go right on the subnet
-        for key in ('NETMASK', 'BROADCAST', 'GATEWAY'):
+        for key in ("NETMASK", "BROADCAST", "GATEWAY"):
             if pre + key in data:
                 subnet[key.lower()] = data[pre + key]
 
         dns = []
         # handle IPV4DNS0 or IPV6DNS0
-        for nskey in ('DNS0', 'DNS1'):
+        for nskey in ("DNS0", "DNS1"):
             ns = data.get(pre + nskey)
             # verify it has something other than 0.0.0.0 (or ipv6)
             if ns and len(ns.strip(":.0")):
                 dns.append(data[pre + nskey])
         if dns:
-            subnet['dns_nameservers'] = dns
+            subnet["dns_nameservers"] = dns
             # add search to both ipv4 and ipv6, as it has no namespace
-            search = data.get('DOMAINSEARCH')
+            search = data.get("DOMAINSEARCH")
             if search:
-                if ',' in search:
-                    subnet['dns_search'] = search.split(",")
+                if "," in search:
+                    subnet["dns_search"] = search.split(",")
                 else:
-                    subnet['dns_search'] = search.split()
+                    subnet["dns_search"] = search.split()
 
-        iface['subnets'].append(subnet)
+        iface["subnets"].append(subnet)
 
     return name, iface
 
 
 def _get_klibc_net_cfg_files():
-    return glob.glob('/run/net-*.conf') + glob.glob('/run/net6-*.conf')
+    return glob.glob("/run/net-*.conf") + glob.glob("/run/net6-*.conf")
 
 
 def config_from_klibc_net_cfg(files=None, mac_addrs=None):
@@ -194,24 +194,28 @@ def config_from_klibc_net_cfg(files=None, mac_addrs=None):
     entries = []
     names = {}
     for cfg_file in files:
-        name, entry = _klibc_to_config_entry(util.load_file(cfg_file),
-                                             mac_addrs=mac_addrs)
+        name, entry = _klibc_to_config_entry(
+            util.load_file(cfg_file), mac_addrs=mac_addrs
+        )
         if name in names:
-            prev = names[name]['entry']
-            if prev.get('mac_address') != entry.get('mac_address'):
+            prev = names[name]["entry"]
+            if prev.get("mac_address") != entry.get("mac_address"):
                 raise ValueError(
                     "device '{name}' was defined multiple times ({files})"
                     " but had differing mac addresses: {old} -> {new}.".format(
-                        name=name, files=' '.join(names[name]['files']),
-                        old=prev.get('mac_address'),
-                        new=entry.get('mac_address')))
-            prev['subnets'].extend(entry['subnets'])
-            names[name]['files'].append(cfg_file)
+                        name=name,
+                        files=" ".join(names[name]["files"]),
+                        old=prev.get("mac_address"),
+                        new=entry.get("mac_address"),
+                    )
+                )
+            prev["subnets"].extend(entry["subnets"])
+            names[name]["files"].append(cfg_file)
         else:
-            names[name] = {'files': [cfg_file], 'entry': entry}
+            names[name] = {"files": [cfg_file], "entry": entry}
             entries.append(entry)
 
-    return {'config': entries, 'version': 1}
+    return {"config": entries, "version": 1}
 
 
 def read_initramfs_config():
@@ -257,8 +261,10 @@ def _b64dgz(data):
     except (TypeError, ValueError):
         logging.error(
             "Expected base64 encoded kernel commandline parameter"
-            " network-config. Ignoring network-config=%s.", data)
-        return ''
+            " network-config. Ignoring network-config=%s.",
+            data,
+        )
+        return ""
 
     return _decomp_gzip(blob)
 
@@ -267,7 +273,7 @@ def read_kernel_cmdline_config(cmdline=None):
     if cmdline is None:
         cmdline = util.get_cmdline()
 
-    if 'network-config=' in cmdline:
+    if "network-config=" in cmdline:
         data64 = None
         for tok in cmdline.split():
             if tok.startswith("network-config="):
@@ -279,4 +285,5 @@ def read_kernel_cmdline_config(cmdline=None):
 
     return None
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/net/dhcp.py b/cloudinit/net/dhcp.py
index 3f4b0418..f9af18cf 100644
--- a/cloudinit/net/dhcp.py
+++ b/cloudinit/net/dhcp.py
@@ -4,26 +4,28 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from typing import Dict, Any
-import configobj
 import logging
 import os
 import re
 import signal
 import time
 from io import StringIO
+from typing import Any, Dict
+
+import configobj
 
+from cloudinit import subp, temp_utils, util
 from cloudinit.net import (
-    EphemeralIPv4Network, find_fallback_nic, get_devicelist,
-    has_url_connectivity)
+    EphemeralIPv4Network,
+    find_fallback_nic,
+    get_devicelist,
+    has_url_connectivity,
+)
 from cloudinit.net.network_state import mask_and_ipv4_to_bcast_addr as bcip
-from cloudinit import temp_utils
-from cloudinit import subp
-from cloudinit import util
 
 LOG = logging.getLogger(__name__)
 
-NETWORKD_LEASES_DIR = '/run/systemd/netif/leases'
+NETWORKD_LEASES_DIR = "/run/systemd/netif/leases"
 
 
 class InvalidDHCPLeaseFileError(Exception):
@@ -43,7 +45,7 @@ class EphemeralDHCPv4(object):
         self,
         iface=None,
         connectivity_url_data: Dict[str, Any] = None,
-        dhcp_log_func=None
+        dhcp_log_func=None,
     ):
         self.iface = iface
         self._ephipv4 = None
@@ -57,8 +59,10 @@ class EphemeralDHCPv4(object):
         if self.connectivity_url_data:
             if has_url_connectivity(self.connectivity_url_data):
                 LOG.debug(
-                    'Skip ephemeral DHCP setup, instance has connectivity'
-                    ' to %s', self.connectivity_url_data)
+                    "Skip ephemeral DHCP setup, instance has connectivity"
+                    " to %s",
+                    self.connectivity_url_data,
+                )
                 return
         return self.obtain_lease()
 
@@ -87,31 +91,39 @@ class EphemeralDHCPv4(object):
             return self.lease
         try:
             leases = maybe_perform_dhcp_discovery(
-                self.iface, self.dhcp_log_func)
+                self.iface, self.dhcp_log_func
+            )
         except InvalidDHCPLeaseFileError as e:
             raise NoDHCPLeaseError() from e
         if not leases:
             raise NoDHCPLeaseError()
         self.lease = leases[-1]
-        LOG.debug("Received dhcp lease on %s for %s/%s",
-                  self.lease['interface'], self.lease['fixed-address'],
-                  self.lease['subnet-mask'])
-        nmap = {'interface': 'interface', 'ip': 'fixed-address',
-                'prefix_or_mask': 'subnet-mask',
-                'broadcast': 'broadcast-address',
-                'static_routes': [
-                    'rfc3442-classless-static-routes',
-                    'classless-static-routes'
-                ],
-                'router': 'routers'}
+        LOG.debug(
+            "Received dhcp lease on %s for %s/%s",
+            self.lease["interface"],
+            self.lease["fixed-address"],
+            self.lease["subnet-mask"],
+        )
+        nmap = {
+            "interface": "interface",
+            "ip": "fixed-address",
+            "prefix_or_mask": "subnet-mask",
+            "broadcast": "broadcast-address",
+            "static_routes": [
+                "rfc3442-classless-static-routes",
+                "classless-static-routes",
+            ],
+            "router": "routers",
+        }
         kwargs = self.extract_dhcp_options_mapping(nmap)
-        if not kwargs['broadcast']:
-            kwargs['broadcast'] = bcip(kwargs['prefix_or_mask'], kwargs['ip'])
-        if kwargs['static_routes']:
-            kwargs['static_routes'] = (
-                parse_static_routes(kwargs['static_routes']))
+        if not kwargs["broadcast"]:
+            kwargs["broadcast"] = bcip(kwargs["prefix_or_mask"], kwargs["ip"])
+        if kwargs["static_routes"]:
+            kwargs["static_routes"] = parse_static_routes(
+                kwargs["static_routes"]
+            )
         if self.connectivity_url_data:
-            kwargs['connectivity_url_data'] = self.connectivity_url_data
+            kwargs["connectivity_url_data"] = self.connectivity_url_data
         ephipv4 = EphemeralIPv4Network(**kwargs)
         ephipv4.__enter__()
         self._ephipv4 = ephipv4
@@ -122,16 +134,15 @@ class EphemeralDHCPv4(object):
         for internal_reference, lease_option_names in nmap.items():
             if isinstance(lease_option_names, list):
                 self.get_first_option_value(
-                    internal_reference,
-                    lease_option_names,
-                    result
+                    internal_reference, lease_option_names, result
                 )
             else:
                 result[internal_reference] = self.lease.get(lease_option_names)
         return result
 
-    def get_first_option_value(self, internal_mapping,
-                               lease_option_names, result):
+    def get_first_option_value(
+        self, internal_mapping, lease_option_names, result
+    ):
         for different_names in lease_option_names:
             if not result.get(internal_mapping):
                 result[internal_mapping] = self.lease.get(different_names)
@@ -153,19 +164,20 @@ def maybe_perform_dhcp_discovery(nic=None, dhcp_log_func=None):
     if nic is None:
         nic = find_fallback_nic()
         if nic is None:
-            LOG.debug('Skip dhcp_discovery: Unable to find fallback nic.')
+            LOG.debug("Skip dhcp_discovery: Unable to find fallback nic.")
             return []
     elif nic not in get_devicelist():
         LOG.debug(
-            'Skip dhcp_discovery: nic %s not found in get_devicelist.', nic)
+            "Skip dhcp_discovery: nic %s not found in get_devicelist.", nic
+        )
         return []
-    dhclient_path = subp.which('dhclient')
+    dhclient_path = subp.which("dhclient")
     if not dhclient_path:
-        LOG.debug('Skip dhclient configuration: No dhclient command found.')
+        LOG.debug("Skip dhclient configuration: No dhclient command found.")
         return []
-    with temp_utils.tempdir(rmtree_ignore_errors=True,
-                            prefix='cloud-init-dhcp-',
-                            needs_exe=True) as tdir:
+    with temp_utils.tempdir(
+        rmtree_ignore_errors=True, prefix="cloud-init-dhcp-", needs_exe=True
+    ) as tdir:
         # Use /var/tmp because /run/cloud-init/tmp is mounted noexec
         return dhcp_discovery(dhclient_path, nic, tdir, dhcp_log_func)
 
@@ -184,20 +196,23 @@ def parse_dhcp_lease_file(lease_file):
     lease_content = util.load_file(lease_file)
     if len(lease_content) == 0:
         raise InvalidDHCPLeaseFileError(
-            'Cannot parse empty dhcp lease file {0}'.format(lease_file))
+            "Cannot parse empty dhcp lease file {0}".format(lease_file)
+        )
     for lease in lease_regex.findall(lease_content):
         lease_options = []
-        for line in lease.split(';'):
+        for line in lease.split(";"):
             # Strip newlines, double-quotes and option prefix
-            line = line.strip().replace('"', '').replace('option ', '')
+            line = line.strip().replace('"', "").replace("option ", "")
             if not line:
                 continue
-            lease_options.append(line.split(' ', 1))
+            lease_options.append(line.split(" ", 1))
         dhcp_leases.append(dict(lease_options))
     if not dhcp_leases:
         raise InvalidDHCPLeaseFileError(
-            'Cannot parse dhcp lease file {0}. No leases found'.format(
-                lease_file))
+            "Cannot parse dhcp lease file {0}. No leases found".format(
+                lease_file
+            )
+        )
     return dhcp_leases
 
 
@@ -214,17 +229,17 @@ def dhcp_discovery(dhclient_cmd_path, interface, cleandir, dhcp_log_func=None):
     @return: A list of dicts of representing the dhcp leases parsed from the
         dhcp.leases file or empty list.
     """
-    LOG.debug('Performing a dhcp discovery on %s', interface)
+    LOG.debug("Performing a dhcp discovery on %s", interface)
 
     # XXX We copy dhclient out of /sbin/dhclient to avoid dealing with strict
     # app armor profiles which disallow running dhclient -sf <our-script-file>.
     # We want to avoid running /sbin/dhclient-script because of side-effects in
     # /etc/resolv.conf any any other vendor specific scripts in
     # /etc/dhcp/dhclient*hooks.d.
-    sandbox_dhclient_cmd = os.path.join(cleandir, 'dhclient')
+    sandbox_dhclient_cmd = os.path.join(cleandir, "dhclient")
     util.copy(dhclient_cmd_path, sandbox_dhclient_cmd)
-    pid_file = os.path.join(cleandir, 'dhclient.pid')
-    lease_file = os.path.join(cleandir, 'dhcp.leases')
+    pid_file = os.path.join(cleandir, "dhclient.pid")
+    lease_file = os.path.join(cleandir, "dhcp.leases")
 
     # In some cases files in /var/tmp may not be executable, launching dhclient
     # from there will certainly raise 'Permission denied' error. Try launching
@@ -236,9 +251,19 @@ def dhcp_discovery(dhclient_cmd_path, interface, cleandir, dhcp_log_func=None):
     # Generally dhclient relies on dhclient-script PREINIT action to bring the
     # link up before attempting discovery. Since we are using -sf /bin/true,
     # we need to do that "link up" ourselves first.
-    subp.subp(['ip', 'link', 'set', 'dev', interface, 'up'], capture=True)
-    cmd = [sandbox_dhclient_cmd, '-1', '-v', '-lf', lease_file,
-           '-pf', pid_file, interface, '-sf', '/bin/true']
+    subp.subp(["ip", "link", "set", "dev", interface, "up"], capture=True)
+    cmd = [
+        sandbox_dhclient_cmd,
+        "-1",
+        "-v",
+        "-lf",
+        lease_file,
+        "-pf",
+        pid_file,
+        interface,
+        "-sf",
+        "/bin/true",
+    ]
     out, err = subp.subp(cmd, capture=True)
 
     # Wait for pid file and lease file to appear, and for the process
@@ -249,13 +274,16 @@ def dhcp_discovery(dhclient_cmd_path, interface, cleandir, dhcp_log_func=None):
     # kill the correct process, thus freeing cleandir to be deleted back
     # up the callstack.
     missing = util.wait_for_files(
-        [pid_file, lease_file], maxwait=5, naplen=0.01)
+        [pid_file, lease_file], maxwait=5, naplen=0.01
+    )
     if missing:
-        LOG.warning("dhclient did not produce expected files: %s",
-                    ', '.join(os.path.basename(f) for f in missing))
+        LOG.warning(
+            "dhclient did not produce expected files: %s",
+            ", ".join(os.path.basename(f) for f in missing),
+        )
         return []
 
-    ppid = 'unknown'
+    ppid = "unknown"
     daemonized = False
     for _ in range(0, 1000):
         pid_content = util.load_file(pid_file).strip()
@@ -266,7 +294,7 @@ def dhcp_discovery(dhclient_cmd_path, interface, cleandir, dhcp_log_func=None):
         else:
             ppid = util.get_proc_ppid(pid)
             if ppid == 1:
-                LOG.debug('killing dhclient with pid=%s', pid)
+                LOG.debug("killing dhclient with pid=%s", pid)
                 os.kill(pid, signal.SIGKILL)
                 daemonized = True
                 break
@@ -274,8 +302,11 @@ def dhcp_discovery(dhclient_cmd_path, interface, cleandir, dhcp_log_func=None):
 
     if not daemonized:
         LOG.error(
-            'dhclient(pid=%s, parentpid=%s) failed to daemonize after %s '
-            'seconds', pid_content, ppid, 0.01 * 1000
+            "dhclient(pid=%s, parentpid=%s) failed to daemonize after %s "
+            "seconds",
+            pid_content,
+            ppid,
+            0.01 * 1000,
         )
     if dhcp_log_func is not None:
         dhcp_log_func(out, err)
@@ -307,7 +338,8 @@ def networkd_load_leases(leases_d=None):
         return ret
     for lfile in os.listdir(leases_d):
         ret[lfile] = networkd_parse_lease(
-            util.load_file(os.path.join(leases_d, lfile)))
+            util.load_file(os.path.join(leases_d, lfile))
+        )
     return ret
 
 
@@ -322,7 +354,7 @@ def networkd_get_option_from_leases(keyname, leases_d=None):
 
 
 def parse_static_routes(rfc3442):
-    """ parse rfc3442 format and return a list containing tuple of strings.
+    """parse rfc3442 format and return a list containing tuple of strings.
 
     The tuple is composed of the network_address (including net length) and
     gateway for a parsed static route.  It can parse two formats of rfc3442,
@@ -352,10 +384,12 @@ def parse_static_routes(rfc3442):
     static_routes = []
 
     def _trunc_error(cidr, required, remain):
-        msg = ("RFC3442 string malformed.  Current route has CIDR of %s "
-               "and requires %s significant octets, but only %s remain. "
-               "Verify DHCP rfc3442-classless-static-routes value: %s"
-               % (cidr, required, remain, rfc3442))
+        msg = (
+            "RFC3442 string malformed.  Current route has CIDR of %s "
+            "and requires %s significant octets, but only %s remain. "
+            "Verify DHCP rfc3442-classless-static-routes value: %s"
+            % (cidr, required, remain, rfc3442)
+        )
         LOG.error(msg)
 
     current_idx = 0
@@ -368,32 +402,32 @@ def parse_static_routes(rfc3442):
             if len(tokens[idx:]) < req_toks:
                 _trunc_error(net_length, req_toks, len(tokens[idx:]))
                 return static_routes
-            net_address = ".".join(tokens[idx+1:idx+5])
-            gateway = ".".join(tokens[idx+5:idx+req_toks])
+            net_address = ".".join(tokens[idx + 1 : idx + 5])
+            gateway = ".".join(tokens[idx + 5 : idx + req_toks])
             current_idx = idx + req_toks
         elif net_length in range(17, 25):
             req_toks = 8
             if len(tokens[idx:]) < req_toks:
                 _trunc_error(net_length, req_toks, len(tokens[idx:]))
                 return static_routes
-            net_address = ".".join(tokens[idx+1:idx+4] + ["0"])
-            gateway = ".".join(tokens[idx+4:idx+req_toks])
+            net_address = ".".join(tokens[idx + 1 : idx + 4] + ["0"])
+            gateway = ".".join(tokens[idx + 4 : idx + req_toks])
             current_idx = idx + req_toks
         elif net_length in range(9, 17):
             req_toks = 7
             if len(tokens[idx:]) < req_toks:
                 _trunc_error(net_length, req_toks, len(tokens[idx:]))
                 return static_routes
-            net_address = ".".join(tokens[idx+1:idx+3] + ["0", "0"])
-            gateway = ".".join(tokens[idx+3:idx+req_toks])
+            net_address = ".".join(tokens[idx + 1 : idx + 3] + ["0", "0"])
+            gateway = ".".join(tokens[idx + 3 : idx + req_toks])
             current_idx = idx + req_toks
         elif net_length in range(1, 9):
             req_toks = 6
             if len(tokens[idx:]) < req_toks:
                 _trunc_error(net_length, req_toks, len(tokens[idx:]))
                 return static_routes
-            net_address = ".".join(tokens[idx+1:idx+2] + ["0", "0", "0"])
-            gateway = ".".join(tokens[idx+2:idx+req_toks])
+            net_address = ".".join(tokens[idx + 1 : idx + 2] + ["0", "0", "0"])
+            gateway = ".".join(tokens[idx + 2 : idx + req_toks])
             current_idx = idx + req_toks
         elif net_length == 0:
             req_toks = 5
@@ -401,15 +435,19 @@ def parse_static_routes(rfc3442):
                 _trunc_error(net_length, req_toks, len(tokens[idx:]))
                 return static_routes
             net_address = "0.0.0.0"
-            gateway = ".".join(tokens[idx+1:idx+req_toks])
+            gateway = ".".join(tokens[idx + 1 : idx + req_toks])
             current_idx = idx + req_toks
         else:
-            LOG.error('Parsed invalid net length "%s".  Verify DHCP '
-                      'rfc3442-classless-static-routes value.', net_length)
+            LOG.error(
+                'Parsed invalid net length "%s".  Verify DHCP '
+                "rfc3442-classless-static-routes value.",
+                net_length,
+            )
             return static_routes
 
         static_routes.append(("%s/%s" % (net_address, net_length), gateway))
 
     return static_routes
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/net/eni.py b/cloudinit/net/eni.py
index a89e5ad2..99e3fbb0 100644
--- a/cloudinit/net/eni.py
+++ b/cloudinit/net/eni.py
@@ -5,32 +5,58 @@ import glob
 import os
 import re
 
-from . import ParserError
-
-from . import renderer
-from .network_state import subnet_is_ipv6
-
 from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
+from . import ParserError, renderer
+from .network_state import subnet_is_ipv6
 
 LOG = logging.getLogger(__name__)
 
 NET_CONFIG_COMMANDS = [
-    "pre-up", "up", "post-up", "down", "pre-down", "post-down",
+    "pre-up",
+    "up",
+    "post-up",
+    "down",
+    "pre-down",
+    "post-down",
 ]
 
 NET_CONFIG_BRIDGE_OPTIONS = [
-    "bridge_ageing", "bridge_bridgeprio", "bridge_fd", "bridge_gcinit",
-    "bridge_hello", "bridge_maxage", "bridge_maxwait", "bridge_stp",
+    "bridge_ageing",
+    "bridge_bridgeprio",
+    "bridge_fd",
+    "bridge_gcinit",
+    "bridge_hello",
+    "bridge_maxage",
+    "bridge_maxwait",
+    "bridge_stp",
 ]
 
 NET_CONFIG_OPTIONS = [
-    "address", "netmask", "broadcast", "network", "metric", "gateway",
-    "pointtopoint", "media", "mtu", "hostname", "leasehours", "leasetime",
-    "vendor", "client", "bootfile", "server", "hwaddr", "provider", "frame",
-    "netnum", "endpoint", "local", "ttl",
+    "address",
+    "netmask",
+    "broadcast",
+    "network",
+    "metric",
+    "gateway",
+    "pointtopoint",
+    "media",
+    "mtu",
+    "hostname",
+    "leasehours",
+    "leasetime",
+    "vendor",
+    "client",
+    "bootfile",
+    "server",
+    "hwaddr",
+    "provider",
+    "frame",
+    "netnum",
+    "endpoint",
+    "local",
+    "ttl",
 ]
 
 
@@ -38,27 +64,27 @@ NET_CONFIG_OPTIONS = [
 def _iface_add_subnet(iface, subnet):
     content = []
     valid_map = [
-        'address',
-        'netmask',
-        'broadcast',
-        'metric',
-        'gateway',
-        'pointopoint',
-        'mtu',
-        'scope',
-        'dns_search',
-        'dns_nameservers',
+        "address",
+        "netmask",
+        "broadcast",
+        "metric",
+        "gateway",
+        "pointopoint",
+        "mtu",
+        "scope",
+        "dns_search",
+        "dns_nameservers",
     ]
     for key, value in subnet.items():
-        if key == 'netmask':
+        if key == "netmask":
             continue
-        if key == 'address':
-            value = "%s/%s" % (subnet['address'], subnet['prefix'])
+        if key == "address":
+            value = "%s/%s" % (subnet["address"], subnet["prefix"])
         if value and key in valid_map:
             if type(value) == list:
                 value = " ".join(value)
-            if '_' in key:
-                key = key.replace('_', '-')
+            if "_" in key:
+                key = key.replace("_", "-")
             content.append("    {0} {1}".format(key, value))
 
     return sorted(content)
@@ -75,41 +101,44 @@ def _iface_add_attrs(iface, index, ipv4_subnet_mtu):
         return []
     content = []
     ignore_map = [
-        'control',
-        'device_id',
-        'driver',
-        'index',
-        'inet',
-        'mode',
-        'name',
-        'subnets',
-        'type',
+        "control",
+        "device_id",
+        "driver",
+        "index",
+        "inet",
+        "mode",
+        "name",
+        "subnets",
+        "type",
     ]
 
     # The following parameters require repetitive entries of the key for
     # each of the values
     multiline_keys = [
-        'bridge_pathcost',
-        'bridge_portprio',
-        'bridge_waitport',
+        "bridge_pathcost",
+        "bridge_portprio",
+        "bridge_waitport",
     ]
 
-    renames = {'mac_address': 'hwaddress'}
-    if iface['type'] not in ['bond', 'bridge', 'infiniband', 'vlan']:
-        ignore_map.append('mac_address')
+    renames = {"mac_address": "hwaddress"}
+    if iface["type"] not in ["bond", "bridge", "infiniband", "vlan"]:
+        ignore_map.append("mac_address")
 
     for key, value in iface.items():
         # convert bool to string for eni
         if type(value) == bool:
-            value = 'on' if iface[key] else 'off'
+            value = "on" if iface[key] else "off"
         if not value or key in ignore_map:
             continue
-        if key == 'mtu' and ipv4_subnet_mtu:
+        if key == "mtu" and ipv4_subnet_mtu:
             if value != ipv4_subnet_mtu:
                 LOG.warning(
                     "Network config: ignoring %s device-level mtu:%s because"
                     " ipv4 subnet-level mtu:%s provided.",
-                    iface['name'], value, ipv4_subnet_mtu)
+                    iface["name"],
+                    value,
+                    ipv4_subnet_mtu,
+                )
             continue
         if key in multiline_keys:
             for v in value:
@@ -123,9 +152,9 @@ def _iface_add_attrs(iface, index, ipv4_subnet_mtu):
 
 
 def _iface_start_entry(iface, index, render_hwaddress=False):
-    fullname = iface['name']
+    fullname = iface["name"]
 
-    control = iface['control']
+    control = iface["control"]
     if control == "auto":
         cverb = "auto"
     elif control in ("hotplug",):
@@ -134,12 +163,13 @@ def _iface_start_entry(iface, index, render_hwaddress=False):
         cverb = "# control-" + control
 
     subst = iface.copy()
-    subst.update({'fullname': fullname, 'cverb': cverb})
+    subst.update({"fullname": fullname, "cverb": cverb})
 
     lines = [
         "{cverb} {fullname}".format(**subst),
-        "iface {fullname} {inet} {mode}".format(**subst)]
-    if render_hwaddress and iface.get('mac_address'):
+        "iface {fullname} {inet} {mode}".format(**subst),
+    ]
+    if render_hwaddress and iface.get("mac_address"):
         lines.append("    hwaddress {mac_address}".format(**subst))
 
     return lines
@@ -159,9 +189,9 @@ def _parse_deb_config_data(ifaces, contents, src_dir, src_path):
     currif = None
     for line in contents.splitlines():
         line = line.strip()
-        if line.startswith('#'):
+        if line.startswith("#"):
             continue
-        split = line.split(' ')
+        split = line.split(" ")
         option = split[0]
         if option == "source-directory":
             parsed_src_dir = split[1]
@@ -172,16 +202,18 @@ def _parse_deb_config_data(ifaces, contents, src_dir, src_path):
                 dir_contents = [
                     os.path.join(expanded_path, path)
                     for path in dir_contents
-                    if (os.path.isfile(os.path.join(expanded_path, path)) and
-                        re.match("^[a-zA-Z0-9_-]+$", path) is not None)
+                    if (
+                        os.path.isfile(os.path.join(expanded_path, path))
+                        and re.match("^[a-zA-Z0-9_-]+$", path) is not None
+                    )
                 ]
                 for entry in dir_contents:
                     with open(entry, "r") as fp:
                         src_data = fp.read().strip()
                     abs_entry = os.path.abspath(entry)
                     _parse_deb_config_data(
-                        ifaces, src_data,
-                        os.path.dirname(abs_entry), abs_entry)
+                        ifaces, src_data, os.path.dirname(abs_entry), abs_entry
+                    )
         elif option == "source":
             new_src_path = split[1]
             if not new_src_path.startswith("/"):
@@ -191,8 +223,8 @@ def _parse_deb_config_data(ifaces, contents, src_dir, src_path):
                     src_data = fp.read().strip()
                 abs_path = os.path.abspath(expanded_path)
                 _parse_deb_config_data(
-                    ifaces, src_data,
-                    os.path.dirname(abs_path), abs_path)
+                    ifaces, src_data, os.path.dirname(abs_path), abs_path
+                )
         elif option == "auto":
             for iface in split[1:]:
                 if iface not in ifaces:
@@ -200,7 +232,7 @@ def _parse_deb_config_data(ifaces, contents, src_dir, src_path):
                         # Include the source path this interface was found in.
                         "_source_path": src_path
                     }
-                ifaces[iface]['auto'] = True
+                ifaces[iface]["auto"] = True
         elif option == "iface":
             iface, family, method = split[1:4]
             if iface not in ifaces:
@@ -208,71 +240,72 @@ def _parse_deb_config_data(ifaces, contents, src_dir, src_path):
                     # Include the source path this interface was found in.
                     "_source_path": src_path
                 }
-            elif 'family' in ifaces[iface]:
+            elif "family" in ifaces[iface]:
                 raise ParserError(
                     "Interface %s can only be defined once. "
-                    "Re-defined in '%s'." % (iface, src_path))
-            ifaces[iface]['family'] = family
-            ifaces[iface]['method'] = method
+                    "Re-defined in '%s'." % (iface, src_path)
+                )
+            ifaces[iface]["family"] = family
+            ifaces[iface]["method"] = method
             currif = iface
         elif option == "hwaddress":
             if split[1] == "ether":
                 val = split[2]
             else:
                 val = split[1]
-            ifaces[currif]['hwaddress'] = val
+            ifaces[currif]["hwaddress"] = val
         elif option in NET_CONFIG_OPTIONS:
             ifaces[currif][option] = split[1]
         elif option in NET_CONFIG_COMMANDS:
             if option not in ifaces[currif]:
                 ifaces[currif][option] = []
-            ifaces[currif][option].append(' '.join(split[1:]))
-        elif option.startswith('dns-'):
-            if 'dns' not in ifaces[currif]:
-                ifaces[currif]['dns'] = {}
-            if option == 'dns-search':
-                ifaces[currif]['dns']['search'] = []
+            ifaces[currif][option].append(" ".join(split[1:]))
+        elif option.startswith("dns-"):
+            if "dns" not in ifaces[currif]:
+                ifaces[currif]["dns"] = {}
+            if option == "dns-search":
+                ifaces[currif]["dns"]["search"] = []
                 for domain in split[1:]:
-                    ifaces[currif]['dns']['search'].append(domain)
-            elif option == 'dns-nameservers':
-                ifaces[currif]['dns']['nameservers'] = []
+                    ifaces[currif]["dns"]["search"].append(domain)
+            elif option == "dns-nameservers":
+                ifaces[currif]["dns"]["nameservers"] = []
                 for server in split[1:]:
-                    ifaces[currif]['dns']['nameservers'].append(server)
-        elif option.startswith('bridge_'):
-            if 'bridge' not in ifaces[currif]:
-                ifaces[currif]['bridge'] = {}
+                    ifaces[currif]["dns"]["nameservers"].append(server)
+        elif option.startswith("bridge_"):
+            if "bridge" not in ifaces[currif]:
+                ifaces[currif]["bridge"] = {}
             if option in NET_CONFIG_BRIDGE_OPTIONS:
-                bridge_option = option.replace('bridge_', '', 1)
-                ifaces[currif]['bridge'][bridge_option] = split[1]
+                bridge_option = option.replace("bridge_", "", 1)
+                ifaces[currif]["bridge"][bridge_option] = split[1]
             elif option == "bridge_ports":
-                ifaces[currif]['bridge']['ports'] = []
+                ifaces[currif]["bridge"]["ports"] = []
                 for iface in split[1:]:
-                    ifaces[currif]['bridge']['ports'].append(iface)
+                    ifaces[currif]["bridge"]["ports"].append(iface)
             elif option == "bridge_hw":
                 # doc is confusing and thus some may put literal 'MAC'
                 #    bridge_hw MAC <address>
                 # but correct is:
                 #    bridge_hw <address>
                 if split[1].lower() == "mac":
-                    ifaces[currif]['bridge']['mac'] = split[2]
+                    ifaces[currif]["bridge"]["mac"] = split[2]
                 else:
-                    ifaces[currif]['bridge']['mac'] = split[1]
+                    ifaces[currif]["bridge"]["mac"] = split[1]
             elif option == "bridge_pathcost":
-                if 'pathcost' not in ifaces[currif]['bridge']:
-                    ifaces[currif]['bridge']['pathcost'] = {}
-                ifaces[currif]['bridge']['pathcost'][split[1]] = split[2]
+                if "pathcost" not in ifaces[currif]["bridge"]:
+                    ifaces[currif]["bridge"]["pathcost"] = {}
+                ifaces[currif]["bridge"]["pathcost"][split[1]] = split[2]
             elif option == "bridge_portprio":
-                if 'portprio' not in ifaces[currif]['bridge']:
-                    ifaces[currif]['bridge']['portprio'] = {}
-                ifaces[currif]['bridge']['portprio'][split[1]] = split[2]
-        elif option.startswith('bond-'):
-            if 'bond' not in ifaces[currif]:
-                ifaces[currif]['bond'] = {}
-            bond_option = option.replace('bond-', '', 1)
-            ifaces[currif]['bond'][bond_option] = split[1]
+                if "portprio" not in ifaces[currif]["bridge"]:
+                    ifaces[currif]["bridge"]["portprio"] = {}
+                ifaces[currif]["bridge"]["portprio"][split[1]] = split[2]
+        elif option.startswith("bond-"):
+            if "bond" not in ifaces[currif]:
+                ifaces[currif]["bond"] = {}
+            bond_option = option.replace("bond-", "", 1)
+            ifaces[currif]["bond"][bond_option] = split[1]
     for iface in ifaces.keys():
-        if 'auto' not in ifaces[iface]:
-            ifaces[iface]['auto'] = False
+        if "auto" not in ifaces[iface]:
+            ifaces[iface]["auto"] = False
 
 
 def parse_deb_config(path):
@@ -282,8 +315,8 @@ def parse_deb_config(path):
         contents = fp.read().strip()
     abs_path = os.path.abspath(path)
     _parse_deb_config_data(
-        ifaces, contents,
-        os.path.dirname(abs_path), abs_path)
+        ifaces, contents, os.path.dirname(abs_path), abs_path
+    )
     return ifaces
 
 
@@ -308,32 +341,31 @@ def _ifaces_to_net_config_data(ifaces):
                 dtype = "loopback"
             else:
                 dtype = "physical"
-            devs[devname] = {'type': dtype, 'name': devname, 'subnets': []}
+            devs[devname] = {"type": dtype, "name": devname, "subnets": []}
             # this isnt strictly correct, but some might specify
             # hwaddress on a nic for matching / declaring name.
-            if 'hwaddress' in data:
-                devs[devname]['mac_address'] = data['hwaddress']
-        subnet = {'_orig_eni_name': name, 'type': data['method']}
-        if data.get('auto'):
-            subnet['control'] = 'auto'
+            if "hwaddress" in data:
+                devs[devname]["mac_address"] = data["hwaddress"]
+        subnet = {"_orig_eni_name": name, "type": data["method"]}
+        if data.get("auto"):
+            subnet["control"] = "auto"
         else:
-            subnet['control'] = 'manual'
+            subnet["control"] = "manual"
 
-        if data.get('method') == 'static':
-            subnet['address'] = data['address']
+        if data.get("method") == "static":
+            subnet["address"] = data["address"]
 
-        for copy_key in ('netmask', 'gateway', 'broadcast'):
+        for copy_key in ("netmask", "gateway", "broadcast"):
             if copy_key in data:
                 subnet[copy_key] = data[copy_key]
 
-        if 'dns' in data:
-            for n in ('nameservers', 'search'):
-                if n in data['dns'] and data['dns'][n]:
-                    subnet['dns_' + n] = data['dns'][n]
-        devs[devname]['subnets'].append(subnet)
+        if "dns" in data:
+            for n in ("nameservers", "search"):
+                if n in data["dns"] and data["dns"][n]:
+                    subnet["dns_" + n] = data["dns"][n]
+        devs[devname]["subnets"].append(subnet)
 
-    return {'version': 1,
-            'config': [devs[d] for d in sorted(devs)]}
+    return {"version": 1, "config": [devs[d] for d in sorted(devs)]}
 
 
 class Renderer(renderer.Renderer):
@@ -342,10 +374,11 @@ class Renderer(renderer.Renderer):
     def __init__(self, config=None):
         if not config:
             config = {}
-        self.eni_path = config.get('eni_path', 'etc/network/interfaces')
-        self.eni_header = config.get('eni_header', None)
+        self.eni_path = config.get("eni_path", "etc/network/interfaces")
+        self.eni_header = config.get("eni_header", None)
         self.netrules_path = config.get(
-            'netrules_path', 'etc/udev/rules.d/70-persistent-net.rules')
+            "netrules_path", "etc/udev/rules.d/70-persistent-net.rules"
+        )
 
     def _render_route(self, route, indent=""):
         """When rendering routes for an iface, in some cases applying a route
@@ -367,153 +400,166 @@ class Renderer(renderer.Renderer):
         down = indent + "pre-down route del"
         or_true = " || true"
         mapping = {
-            'gateway': 'gw',
-            'metric': 'metric',
+            "gateway": "gw",
+            "metric": "metric",
         }
 
-        default_gw = ''
-        if route['network'] == '0.0.0.0' and route['netmask'] == '0.0.0.0':
-            default_gw = ' default'
-        elif route['network'] == '::' and route['prefix'] == 0:
-            default_gw = ' -A inet6 default'
+        default_gw = ""
+        if route["network"] == "0.0.0.0" and route["netmask"] == "0.0.0.0":
+            default_gw = " default"
+        elif route["network"] == "::" and route["prefix"] == 0:
+            default_gw = " -A inet6 default"
 
-        route_line = ''
-        for k in ['network', 'gateway', 'metric']:
-            if default_gw and k == 'network':
+        route_line = ""
+        for k in ["network", "gateway", "metric"]:
+            if default_gw and k == "network":
                 continue
-            if k == 'gateway':
-                route_line += '%s %s %s' % (default_gw, mapping[k], route[k])
+            if k == "gateway":
+                route_line += "%s %s %s" % (default_gw, mapping[k], route[k])
             elif k in route:
-                if k == 'network':
-                    if ':' in route[k]:
-                        route_line += ' -A inet6'
-                    elif route.get('prefix') == 32:
-                        route_line += ' -host'
+                if k == "network":
+                    if ":" in route[k]:
+                        route_line += " -A inet6"
+                    elif route.get("prefix") == 32:
+                        route_line += " -host"
                     else:
-                        route_line += ' -net'
-                    if 'prefix' in route:
-                        route_line += ' %s/%s' % (route[k], route['prefix'])
+                        route_line += " -net"
+                    if "prefix" in route:
+                        route_line += " %s/%s" % (route[k], route["prefix"])
                 else:
-                    route_line += ' %s %s' % (mapping[k], route[k])
+                    route_line += " %s %s" % (mapping[k], route[k])
         content.append(up + route_line + or_true)
         content.append(down + route_line + or_true)
         return content
 
     def _render_iface(self, iface, render_hwaddress=False):
         sections = []
-        subnets = iface.get('subnets', {})
-        accept_ra = iface.pop('accept-ra', None)
-        ethernet_wol = iface.pop('wakeonlan', None)
+        subnets = iface.get("subnets", {})
+        accept_ra = iface.pop("accept-ra", None)
+        ethernet_wol = iface.pop("wakeonlan", None)
         if ethernet_wol:
             # Specify WOL setting 'g' for using "Magic Packet"
-            iface['ethernet-wol'] = 'g'
+            iface["ethernet-wol"] = "g"
         if subnets:
             for index, subnet in enumerate(subnets):
                 ipv4_subnet_mtu = None
-                iface['index'] = index
-                iface['mode'] = subnet['type']
-                iface['control'] = subnet.get('control', 'auto')
-                subnet_inet = 'inet'
+                iface["index"] = index
+                iface["mode"] = subnet["type"]
+                iface["control"] = subnet.get("control", "auto")
+                subnet_inet = "inet"
                 if subnet_is_ipv6(subnet):
-                    subnet_inet += '6'
+                    subnet_inet += "6"
                 else:
-                    ipv4_subnet_mtu = subnet.get('mtu')
-                iface['inet'] = subnet_inet
-                if (subnet['type'] == 'dhcp4' or subnet['type'] == 'dhcp6' or
-                        subnet['type'] == 'ipv6_dhcpv6-stateful'):
+                    ipv4_subnet_mtu = subnet.get("mtu")
+                iface["inet"] = subnet_inet
+                if (
+                    subnet["type"] == "dhcp4"
+                    or subnet["type"] == "dhcp6"
+                    or subnet["type"] == "ipv6_dhcpv6-stateful"
+                ):
                     # Configure network settings using DHCP or DHCPv6
-                    iface['mode'] = 'dhcp'
+                    iface["mode"] = "dhcp"
                     if accept_ra is not None:
                         # Accept router advertisements (0=off, 1=on)
-                        iface['accept_ra'] = '1' if accept_ra else '0'
-                elif subnet['type'] == 'ipv6_dhcpv6-stateless':
+                        iface["accept_ra"] = "1" if accept_ra else "0"
+                elif subnet["type"] == "ipv6_dhcpv6-stateless":
                     # Configure network settings using SLAAC from RAs
-                    iface['mode'] = 'auto'
+                    iface["mode"] = "auto"
                     # Use stateless DHCPv6 (0=off, 1=on)
-                    iface['dhcp'] = '1'
-                elif subnet['type'] == 'ipv6_slaac':
+                    iface["dhcp"] = "1"
+                elif subnet["type"] == "ipv6_slaac":
                     # Configure network settings using SLAAC from RAs
-                    iface['mode'] = 'auto'
+                    iface["mode"] = "auto"
                     # Use stateless DHCPv6 (0=off, 1=on)
-                    iface['dhcp'] = '0'
+                    iface["dhcp"] = "0"
                 elif subnet_is_ipv6(subnet):
                     # mode might be static6, eni uses 'static'
-                    iface['mode'] = 'static'
+                    iface["mode"] = "static"
                     if accept_ra is not None:
                         # Accept router advertisements (0=off, 1=on)
-                        iface['accept_ra'] = '1' if accept_ra else '0'
+                        iface["accept_ra"] = "1" if accept_ra else "0"
 
                 # do not emit multiple 'auto $IFACE' lines as older (precise)
                 # ifupdown complains
-                if True in ["auto %s" % (iface['name']) in line
-                            for line in sections]:
-                    iface['control'] = 'alias'
+                if True in [
+                    "auto %s" % (iface["name"]) in line for line in sections
+                ]:
+                    iface["control"] = "alias"
 
                 lines = list(
                     _iface_start_entry(
-                        iface, index, render_hwaddress=render_hwaddress) +
-                    _iface_add_subnet(iface, subnet) +
-                    _iface_add_attrs(iface, index, ipv4_subnet_mtu)
+                        iface, index, render_hwaddress=render_hwaddress
+                    )
+                    + _iface_add_subnet(iface, subnet)
+                    + _iface_add_attrs(iface, index, ipv4_subnet_mtu)
                 )
-                for route in subnet.get('routes', []):
+                for route in subnet.get("routes", []):
                     lines.extend(self._render_route(route, indent="    "))
 
                 sections.append(lines)
         else:
             # ifenslave docs say to auto the slave devices
             lines = []
-            if 'bond-master' in iface or 'bond-slaves' in iface:
+            if "bond-master" in iface or "bond-slaves" in iface:
                 lines.append("auto {name}".format(**iface))
             lines.append("iface {name} {inet} {mode}".format(**iface))
             lines.extend(
-                _iface_add_attrs(iface, index=0, ipv4_subnet_mtu=None))
+                _iface_add_attrs(iface, index=0, ipv4_subnet_mtu=None)
+            )
             sections.append(lines)
         return sections
 
     def _render_interfaces(self, network_state, render_hwaddress=False):
-        '''Given state, emit etc/network/interfaces content.'''
+        """Given state, emit etc/network/interfaces content."""
 
         # handle 'lo' specifically as we need to insert the global dns entries
         # there (as that is the only interface that will be always up).
-        lo = {'name': 'lo', 'type': 'physical', 'inet': 'inet',
-              'subnets': [{'type': 'loopback', 'control': 'auto'}]}
+        lo = {
+            "name": "lo",
+            "type": "physical",
+            "inet": "inet",
+            "subnets": [{"type": "loopback", "control": "auto"}],
+        }
         for iface in network_state.iter_interfaces():
-            if iface.get('name') == "lo":
+            if iface.get("name") == "lo":
                 lo = copy.deepcopy(iface)
 
         nameservers = network_state.dns_nameservers
         if nameservers:
-            lo['subnets'][0]["dns_nameservers"] = (" ".join(nameservers))
+            lo["subnets"][0]["dns_nameservers"] = " ".join(nameservers)
 
         searchdomains = network_state.dns_searchdomains
         if searchdomains:
-            lo['subnets'][0]["dns_search"] = (" ".join(searchdomains))
+            lo["subnets"][0]["dns_search"] = " ".join(searchdomains)
 
         # Apply a sort order to ensure that we write out the physical
         # interfaces first; this is critical for bonding
         order = {
-            'loopback': 0,
-            'physical': 1,
-            'infiniband': 2,
-            'bond': 3,
-            'bridge': 4,
-            'vlan': 5,
+            "loopback": 0,
+            "physical": 1,
+            "infiniband": 2,
+            "bond": 3,
+            "bridge": 4,
+            "vlan": 5,
         }
 
         sections = []
         sections.extend(self._render_iface(lo))
-        for iface in sorted(network_state.iter_interfaces(),
-                            key=lambda k: (order[k['type']], k['name'])):
+        for iface in sorted(
+            network_state.iter_interfaces(),
+            key=lambda k: (order[k["type"]], k["name"]),
+        ):
 
-            if iface.get('name') == "lo":
+            if iface.get("name") == "lo":
                 continue
             sections.extend(
-                self._render_iface(iface, render_hwaddress=render_hwaddress))
+                self._render_iface(iface, render_hwaddress=render_hwaddress)
+            )
 
         for route in network_state.iter_routes():
             sections.append(self._render_route(route))
 
-        return '\n\n'.join(['\n'.join(s) for s in sections]) + "\n"
+        return "\n\n".join(["\n".join(s) for s in sections]) + "\n"
 
     def render_network_state(self, network_state, templates=None, target=None):
         fpeni = subp.target_path(target, self.eni_path)
@@ -524,34 +570,38 @@ class Renderer(renderer.Renderer):
         if self.netrules_path:
             netrules = subp.target_path(target, self.netrules_path)
             util.ensure_dir(os.path.dirname(netrules))
-            util.write_file(netrules,
-                            self._render_persistent_net(network_state))
+            util.write_file(
+                netrules, self._render_persistent_net(network_state)
+            )
 
 
 def network_state_to_eni(network_state, header=None, render_hwaddress=False):
     # render the provided network state, return a string of equivalent eni
-    eni_path = 'etc/network/interfaces'
-    renderer = Renderer(config={
-        'eni_path': eni_path,
-        'eni_header': header,
-        'netrules_path': None,
-    })
+    eni_path = "etc/network/interfaces"
+    renderer = Renderer(
+        config={
+            "eni_path": eni_path,
+            "eni_header": header,
+            "netrules_path": None,
+        }
+    )
     if not header:
         header = ""
     if not header.endswith("\n"):
         header += "\n"
     contents = renderer._render_interfaces(
-        network_state, render_hwaddress=render_hwaddress)
+        network_state, render_hwaddress=render_hwaddress
+    )
     return header + contents
 
 
 def available(target=None):
-    expected = ['ifquery', 'ifup', 'ifdown']
-    search = ['/sbin', '/usr/sbin']
+    expected = ["ifquery", "ifup", "ifdown"]
+    search = ["/sbin", "/usr/sbin"]
     for p in expected:
         if not subp.which(p, search=search, target=target):
             return False
-    eni = subp.target_path(target, 'etc/network/interfaces')
+    eni = subp.target_path(target, "etc/network/interfaces")
     if not os.path.isfile(eni):
         return False
 
diff --git a/cloudinit/net/freebsd.py b/cloudinit/net/freebsd.py
index f8faf240..ec42b60c 100644
--- a/cloudinit/net/freebsd.py
+++ b/cloudinit/net/freebsd.py
@@ -1,31 +1,29 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import log as logging
 import cloudinit.net.bsd
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import log as logging
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
 
 class Renderer(cloudinit.net.bsd.BSDRenderer):
-
     def __init__(self, config=None):
         self._route_cpt = 0
         super(Renderer, self).__init__()
 
     def rename_interface(self, cur_name, device_name):
-        self.set_rc_config_value('ifconfig_%s_name' % cur_name, device_name)
+        self.set_rc_config_value("ifconfig_%s_name" % cur_name, device_name)
 
     def write_config(self):
         for device_name, v in self.interface_configurations.items():
-            net_config = 'DHCP'
+            net_config = "DHCP"
             if isinstance(v, dict):
-                net_config = v.get('address') + ' netmask ' + v.get('netmask')
-                mtu = v.get('mtu')
+                net_config = v.get("address") + " netmask " + v.get("netmask")
+                mtu = v.get("mtu")
                 if mtu:
-                    net_config += (' mtu %d' % mtu)
-            self.set_rc_config_value('ifconfig_' + device_name, net_config)
+                    net_config += " mtu %d" % mtu
+            self.set_rc_config_value("ifconfig_" + device_name, net_config)
 
     def start_services(self, run=False):
         if not run:
@@ -35,29 +33,33 @@ class Renderer(cloudinit.net.bsd.BSDRenderer):
         for dhcp_interface in self.dhcp_interfaces():
             # Observed on DragonFlyBSD 6. If we use the "restart" parameter,
             # the routes are not recreated.
-            subp.subp(['service', 'dhclient', 'stop', dhcp_interface],
-                      rcs=[0, 1],
-                      capture=True)
+            subp.subp(
+                ["service", "dhclient", "stop", dhcp_interface],
+                rcs=[0, 1],
+                capture=True,
+            )
 
-        subp.subp(['service', 'netif', 'restart'], capture=True)
+        subp.subp(["service", "netif", "restart"], capture=True)
         # On FreeBSD 10, the restart of routing and dhclient is likely to fail
         # because
         # - routing: it cannot remove the loopback route, but it will still set
         #   up the default route as expected.
         # - dhclient: it cannot stop the dhclient started by the netif service.
         # In both case, the situation is ok, and we can proceed.
-        subp.subp(['service', 'routing', 'restart'], capture=True, rcs=[0, 1])
+        subp.subp(["service", "routing", "restart"], capture=True, rcs=[0, 1])
 
         for dhcp_interface in self.dhcp_interfaces():
-            subp.subp(['service', 'dhclient', 'start', dhcp_interface],
-                      rcs=[0, 1],
-                      capture=True)
+            subp.subp(
+                ["service", "dhclient", "start", dhcp_interface],
+                rcs=[0, 1],
+                capture=True,
+            )
 
     def set_route(self, network, netmask, gateway):
-        if network == '0.0.0.0':
-            self.set_rc_config_value('defaultrouter', gateway)
+        if network == "0.0.0.0":
+            self.set_rc_config_value("defaultrouter", gateway)
         else:
-            route_name = 'route_net%d' % self._route_cpt
+            route_name = "route_net%d" % self._route_cpt
             route_cmd = "-route %s/%s %s" % (network, netmask, gateway)
             self.set_rc_config_value(route_name, route_cmd)
             self._route_cpt += 1
diff --git a/cloudinit/net/netbsd.py b/cloudinit/net/netbsd.py
index 5f8881a5..3d6b85b7 100644
--- a/cloudinit/net/netbsd.py
+++ b/cloudinit/net/netbsd.py
@@ -1,45 +1,42 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
 import cloudinit.net.bsd
+from cloudinit import log as logging
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
 
 class Renderer(cloudinit.net.bsd.BSDRenderer):
-
     def __init__(self, config=None):
         super(Renderer, self).__init__()
 
     def write_config(self):
         if self.dhcp_interfaces():
-            self.set_rc_config_value('dhcpcd', 'YES')
+            self.set_rc_config_value("dhcpcd", "YES")
             self.set_rc_config_value(
-                'dhcpcd_flags',
-                ' '.join(self.dhcp_interfaces())
+                "dhcpcd_flags", " ".join(self.dhcp_interfaces())
             )
         for device_name, v in self.interface_configurations.items():
             if isinstance(v, dict):
-                net_config = v.get('address') + ' netmask ' + v.get('netmask')
-                mtu = v.get('mtu')
+                net_config = v.get("address") + " netmask " + v.get("netmask")
+                mtu = v.get("mtu")
                 if mtu:
-                    net_config += (' mtu %d' % mtu)
-                self.set_rc_config_value('ifconfig_' + device_name, net_config)
+                    net_config += " mtu %d" % mtu
+                self.set_rc_config_value("ifconfig_" + device_name, net_config)
 
     def start_services(self, run=False):
         if not run:
             LOG.debug("netbsd generate postcmd disabled")
             return
 
-        subp.subp(['service', 'network', 'restart'], capture=True)
+        subp.subp(["service", "network", "restart"], capture=True)
         if self.dhcp_interfaces():
-            subp.subp(['service', 'dhcpcd', 'restart'], capture=True)
+            subp.subp(["service", "dhcpcd", "restart"], capture=True)
 
     def set_route(self, network, netmask, gateway):
-        if network == '0.0.0.0':
-            self.set_rc_config_value('defaultroute', gateway)
+        if network == "0.0.0.0":
+            self.set_rc_config_value("defaultroute", gateway)
 
 
 def available(target=None):
diff --git a/cloudinit/net/netplan.py b/cloudinit/net/netplan.py
index 41acf963..57ba2d9a 100644
--- a/cloudinit/net/netplan.py
+++ b/cloudinit/net/netplan.py
@@ -3,20 +3,18 @@
 import copy
 import os
 
+from cloudinit import log as logging
+from cloudinit import safeyaml, subp, util
+from cloudinit.net import SYS_CLASS_NET, get_devicelist
+
 from . import renderer
 from .network_state import (
+    IPV6_DYNAMIC_TYPES,
+    NET_CONFIG_TO_V2,
     NetworkState,
     subnet_is_ipv6,
-    NET_CONFIG_TO_V2,
-    IPV6_DYNAMIC_TYPES,
 )
 
-from cloudinit import log as logging
-from cloudinit import util
-from cloudinit import subp
-from cloudinit import safeyaml
-from cloudinit.net import SYS_CLASS_NET, get_devicelist
-
 KNOWN_SNAPD_CONFIG = b"""\
 # This is the initial network config.
 # It can be overwritten by cloud-init or console-conf.
@@ -37,8 +35,11 @@ LOG = logging.getLogger(__name__)
 
 
 def _get_params_dict_by_match(config, match):
-    return dict((key, value) for (key, value) in config.items()
-                if key.startswith(match))
+    return dict(
+        (key, value)
+        for (key, value) in config.items()
+        if key.startswith(match)
+    )
 
 
 def _extract_addresses(config, entry, ifname, features=None):
@@ -78,14 +79,16 @@ def _extract_addresses(config, entry, ifname, features=None):
 
     """
 
-    def _listify(obj, token=' '):
+    def _listify(obj, token=" "):
         "Helper to convert strings to list of strings, handle single string"
         if not obj or type(obj) not in [str]:
             return obj
         if token in obj:
             return obj.split(token)
         else:
-            return [obj, ]
+            return [
+                obj,
+            ]
 
     if features is None:
         features = []
@@ -93,78 +96,85 @@ def _extract_addresses(config, entry, ifname, features=None):
     routes = []
     nameservers = []
     searchdomains = []
-    subnets = config.get('subnets', [])
+    subnets = config.get("subnets", [])
     if subnets is None:
         subnets = []
     for subnet in subnets:
-        sn_type = subnet.get('type')
-        if sn_type.startswith('dhcp'):
-            if sn_type == 'dhcp':
-                sn_type += '4'
+        sn_type = subnet.get("type")
+        if sn_type.startswith("dhcp"):
+            if sn_type == "dhcp":
+                sn_type += "4"
             entry.update({sn_type: True})
         elif sn_type in IPV6_DYNAMIC_TYPES:
-            entry.update({'dhcp6': True})
-        elif sn_type in ['static', 'static6']:
-            addr = "%s" % subnet.get('address')
-            if 'prefix' in subnet:
-                addr += "/%d" % subnet.get('prefix')
-            if 'gateway' in subnet and subnet.get('gateway'):
-                gateway = subnet.get('gateway')
+            entry.update({"dhcp6": True})
+        elif sn_type in ["static", "static6"]:
+            addr = "%s" % subnet.get("address")
+            if "prefix" in subnet:
+                addr += "/%d" % subnet.get("prefix")
+            if "gateway" in subnet and subnet.get("gateway"):
+                gateway = subnet.get("gateway")
                 if ":" in gateway:
-                    entry.update({'gateway6': gateway})
+                    entry.update({"gateway6": gateway})
                 else:
-                    entry.update({'gateway4': gateway})
-            if 'dns_nameservers' in subnet:
-                nameservers += _listify(subnet.get('dns_nameservers', []))
-            if 'dns_search' in subnet:
-                searchdomains += _listify(subnet.get('dns_search', []))
-            if 'mtu' in subnet:
-                mtukey = 'mtu'
-                if subnet_is_ipv6(subnet) and 'ipv6-mtu' in features:
-                    mtukey = 'ipv6-mtu'
-                entry.update({mtukey: subnet.get('mtu')})
-            for route in subnet.get('routes', []):
-                to_net = "%s/%s" % (route.get('network'),
-                                    route.get('prefix'))
+                    entry.update({"gateway4": gateway})
+            if "dns_nameservers" in subnet:
+                nameservers += _listify(subnet.get("dns_nameservers", []))
+            if "dns_search" in subnet:
+                searchdomains += _listify(subnet.get("dns_search", []))
+            if "mtu" in subnet:
+                mtukey = "mtu"
+                if subnet_is_ipv6(subnet) and "ipv6-mtu" in features:
+                    mtukey = "ipv6-mtu"
+                entry.update({mtukey: subnet.get("mtu")})
+            for route in subnet.get("routes", []):
+                to_net = "%s/%s" % (route.get("network"), route.get("prefix"))
                 new_route = {
-                    'via': route.get('gateway'),
-                    'to': to_net,
+                    "via": route.get("gateway"),
+                    "to": to_net,
                 }
-                if 'metric' in route:
-                    new_route.update({'metric': route.get('metric', 100)})
+                if "metric" in route:
+                    new_route.update({"metric": route.get("metric", 100)})
                 routes.append(new_route)
 
             addresses.append(addr)
 
-    if 'mtu' in config:
-        entry_mtu = entry.get('mtu')
-        if entry_mtu and config['mtu'] != entry_mtu:
+    if "mtu" in config:
+        entry_mtu = entry.get("mtu")
+        if entry_mtu and config["mtu"] != entry_mtu:
             LOG.warning(
                 "Network config: ignoring %s device-level mtu:%s because"
                 " ipv4 subnet-level mtu:%s provided.",
-                ifname, config['mtu'], entry_mtu)
+                ifname,
+                config["mtu"],
+                entry_mtu,
+            )
         else:
-            entry['mtu'] = config['mtu']
+            entry["mtu"] = config["mtu"]
     if len(addresses) > 0:
-        entry.update({'addresses': addresses})
+        entry.update({"addresses": addresses})
     if len(routes) > 0:
-        entry.update({'routes': routes})
+        entry.update({"routes": routes})
     if len(nameservers) > 0:
-        ns = {'addresses': nameservers}
-        entry.update({'nameservers': ns})
+        ns = {"addresses": nameservers}
+        entry.update({"nameservers": ns})
     if len(searchdomains) > 0:
-        ns = entry.get('nameservers', {})
-        ns.update({'search': searchdomains})
-        entry.update({'nameservers': ns})
-    if 'accept-ra' in config and config['accept-ra'] is not None:
-        entry.update({'accept-ra': util.is_true(config.get('accept-ra'))})
+        ns = entry.get("nameservers", {})
+        ns.update({"search": searchdomains})
+        entry.update({"nameservers": ns})
+    if "accept-ra" in config and config["accept-ra"] is not None:
+        entry.update({"accept-ra": util.is_true(config.get("accept-ra"))})
 
 
 def _extract_bond_slaves_by_name(interfaces, entry, bond_master):
-    bond_slave_names = sorted([name for (name, cfg) in interfaces.items()
-                               if cfg.get('bond-master', None) == bond_master])
+    bond_slave_names = sorted(
+        [
+            name
+            for (name, cfg) in interfaces.items()
+            if cfg.get("bond-master", None) == bond_master
+        ]
+    )
     if len(bond_slave_names) > 0:
-        entry.update({'interfaces': bond_slave_names})
+        entry.update({"interfaces": bond_slave_names})
 
 
 def _clean_default(target=None):
@@ -177,13 +187,20 @@ def _clean_default(target=None):
     if content != KNOWN_SNAPD_CONFIG:
         return
 
-    derived = [subp.target_path(target, f) for f in (
-               'run/systemd/network/10-netplan-all-en.network',
-               'run/systemd/network/10-netplan-all-eth.network',
-               'run/systemd/generator/netplan.stamp')]
+    derived = [
+        subp.target_path(target, f)
+        for f in (
+            "run/systemd/network/10-netplan-all-en.network",
+            "run/systemd/network/10-netplan-all-eth.network",
+            "run/systemd/generator/netplan.stamp",
+        )
+    ]
     existing = [f for f in derived if os.path.isfile(f)]
-    LOG.debug("removing known config '%s' and derived existing files: %s",
-              tpath, existing)
+    LOG.debug(
+        "removing known config '%s' and derived existing files: %s",
+        tpath,
+        existing,
+    )
 
     for f in [tpath] + existing:
         os.unlink(f)
@@ -192,18 +209,19 @@ def _clean_default(target=None):
 class Renderer(renderer.Renderer):
     """Renders network information in a /etc/netplan/network.yaml format."""
 
-    NETPLAN_GENERATE = ['netplan', 'generate']
-    NETPLAN_INFO = ['netplan', 'info']
+    NETPLAN_GENERATE = ["netplan", "generate"]
+    NETPLAN_INFO = ["netplan", "info"]
 
     def __init__(self, config=None):
         if not config:
             config = {}
-        self.netplan_path = config.get('netplan_path',
-                                       'etc/netplan/50-cloud-init.yaml')
-        self.netplan_header = config.get('netplan_header', None)
-        self._postcmds = config.get('postcmds', False)
-        self.clean_default = config.get('clean_default', True)
-        self._features = config.get('features', None)
+        self.netplan_path = config.get(
+            "netplan_path", "etc/netplan/50-cloud-init.yaml"
+        )
+        self.netplan_header = config.get("netplan_header", None)
+        self._postcmds = config.get("postcmds", False)
+        self.clean_default = config.get("clean_default", True)
+        self._features = config.get("features", None)
 
     @property
     def features(self):
@@ -211,13 +229,13 @@ class Renderer(renderer.Renderer):
             try:
                 info_blob, _err = subp.subp(self.NETPLAN_INFO, capture=True)
                 info = util.load_yaml(info_blob)
-                self._features = info['netplan.io']['features']
+                self._features = info["netplan.io"]["features"]
             except subp.ProcessExecutionError:
                 # if the info subcommand is not present then we don't have any
                 # new features
                 pass
             except (TypeError, KeyError) as e:
-                LOG.debug('Failed to list features from netplan info: %s', e)
+                LOG.debug("Failed to list features from netplan info: %s", e)
         return self._features
 
     def render_network_state(self, network_state, templates=None, target=None):
@@ -249,26 +267,30 @@ class Renderer(renderer.Renderer):
 
     def _net_setup_link(self, run=False):
         """To ensure device link properties are applied, we poke
-           udev to re-evaluate networkd .link files and call
-           the setup_link udev builtin command
+        udev to re-evaluate networkd .link files and call
+        the setup_link udev builtin command
         """
         if not run:
             LOG.debug("netplan net_setup_link postcmd disabled")
             return
-        setup_lnk = ['udevadm', 'test-builtin', 'net_setup_link']
-        for cmd in [setup_lnk + [SYS_CLASS_NET + iface]
-                    for iface in get_devicelist() if
-                    os.path.islink(SYS_CLASS_NET + iface)]:
+        setup_lnk = ["udevadm", "test-builtin", "net_setup_link"]
+        for cmd in [
+            setup_lnk + [SYS_CLASS_NET + iface]
+            for iface in get_devicelist()
+            if os.path.islink(SYS_CLASS_NET + iface)
+        ]:
             subp.subp(cmd, capture=True)
 
     def _render_content(self, network_state: NetworkState):
 
         # if content already in netplan format, pass it back
         if network_state.version == 2:
-            LOG.debug('V2 to V2 passthrough')
-            return safeyaml.dumps({'network': network_state.config},
-                                  explicit_start=False,
-                                  explicit_end=False)
+            LOG.debug("V2 to V2 passthrough")
+            return safeyaml.dumps(
+                {"network": network_state.config},
+                explicit_start=False,
+                explicit_end=False,
+            )
 
         ethernets = {}
         wifis = {}
@@ -277,80 +299,83 @@ class Renderer(renderer.Renderer):
         vlans = {}
         content = []
 
-        interfaces = network_state._network_state.get('interfaces', [])
+        interfaces = network_state._network_state.get("interfaces", [])
 
         nameservers = network_state.dns_nameservers
         searchdomains = network_state.dns_searchdomains
 
         for config in network_state.iter_interfaces():
-            ifname = config.get('name')
+            ifname = config.get("name")
             # filter None (but not False) entries up front
-            ifcfg = dict((key, value) for (key, value) in config.items()
-                         if value is not None)
-
-            if_type = ifcfg.get('type')
-            if if_type == 'physical':
+            ifcfg = dict(
+                (key, value)
+                for (key, value) in config.items()
+                if value is not None
+            )
+
+            if_type = ifcfg.get("type")
+            if if_type == "physical":
                 # required_keys = ['name', 'mac_address']
                 eth = {
-                    'set-name': ifname,
-                    'match': ifcfg.get('match', None),
+                    "set-name": ifname,
+                    "match": ifcfg.get("match", None),
                 }
-                if eth['match'] is None:
-                    macaddr = ifcfg.get('mac_address', None)
+                if eth["match"] is None:
+                    macaddr = ifcfg.get("mac_address", None)
                     if macaddr is not None:
-                        eth['match'] = {'macaddress': macaddr.lower()}
+                        eth["match"] = {"macaddress": macaddr.lower()}
                     else:
-                        del eth['match']
-                        del eth['set-name']
+                        del eth["match"]
+                        del eth["set-name"]
                 _extract_addresses(ifcfg, eth, ifname, self.features)
                 ethernets.update({ifname: eth})
 
-            elif if_type == 'bond':
+            elif if_type == "bond":
                 # required_keys = ['name', 'bond_interfaces']
                 bond = {}
                 bond_config = {}
                 # extract bond params and drop the bond_ prefix as it's
                 # redundent in v2 yaml format
-                v2_bond_map = NET_CONFIG_TO_V2.get('bond')
-                for match in ['bond_', 'bond-']:
+                v2_bond_map = NET_CONFIG_TO_V2.get("bond")
+                for match in ["bond_", "bond-"]:
                     bond_params = _get_params_dict_by_match(ifcfg, match)
                     for (param, value) in bond_params.items():
-                        newname = v2_bond_map.get(param.replace('_', '-'))
+                        newname = v2_bond_map.get(param.replace("_", "-"))
                         if newname is None:
                             continue
                         bond_config.update({newname: value})
 
                 if len(bond_config) > 0:
-                    bond.update({'parameters': bond_config})
-                if ifcfg.get('mac_address'):
-                    bond['macaddress'] = ifcfg.get('mac_address').lower()
-                slave_interfaces = ifcfg.get('bond-slaves')
-                if slave_interfaces == 'none':
+                    bond.update({"parameters": bond_config})
+                if ifcfg.get("mac_address"):
+                    bond["macaddress"] = ifcfg.get("mac_address").lower()
+                slave_interfaces = ifcfg.get("bond-slaves")
+                if slave_interfaces == "none":
                     _extract_bond_slaves_by_name(interfaces, bond, ifname)
                 _extract_addresses(ifcfg, bond, ifname, self.features)
                 bonds.update({ifname: bond})
 
-            elif if_type == 'bridge':
+            elif if_type == "bridge":
                 # required_keys = ['name', 'bridge_ports']
-                ports = sorted(copy.copy(ifcfg.get('bridge_ports')))
+                ports = sorted(copy.copy(ifcfg.get("bridge_ports")))
                 bridge = {
-                    'interfaces': ports,
+                    "interfaces": ports,
                 }
                 # extract bridge params and drop the bridge prefix as it's
                 # redundent in v2 yaml format
-                match_prefix = 'bridge_'
+                match_prefix = "bridge_"
                 params = _get_params_dict_by_match(ifcfg, match_prefix)
                 br_config = {}
 
                 # v2 yaml uses different names for the keys
                 # and at least one value format change
-                v2_bridge_map = NET_CONFIG_TO_V2.get('bridge')
+                v2_bridge_map = NET_CONFIG_TO_V2.get("bridge")
                 for (param, value) in params.items():
                     newname = v2_bridge_map.get(param)
                     if newname is None:
                         continue
                     br_config.update({newname: value})
-                    if newname in ['path-cost', 'port-priority']:
+                    if newname in ["path-cost", "port-priority"]:
                         # <interface> <value> -> <interface>: int(<value>)
                         newvalue = {}
                         for val in value:
@@ -359,58 +384,60 @@ class Renderer(renderer.Renderer):
                         br_config.update({newname: newvalue})
 
                 if len(br_config) > 0:
-                    bridge.update({'parameters': br_config})
-                if ifcfg.get('mac_address'):
-                    bridge['macaddress'] = ifcfg.get('mac_address').lower()
+                    bridge.update({"parameters": br_config})
+                if ifcfg.get("mac_address"):
+                    bridge["macaddress"] = ifcfg.get("mac_address").lower()
                 _extract_addresses(ifcfg, bridge, ifname, self.features)
                 bridges.update({ifname: bridge})
 
-            elif if_type == 'vlan':
+            elif if_type == "vlan":
                 # required_keys = ['name', 'vlan_id', 'vlan-raw-device']
                 vlan = {
-                    'id': ifcfg.get('vlan_id'),
-                    'link': ifcfg.get('vlan-raw-device')
+                    "id": ifcfg.get("vlan_id"),
+                    "link": ifcfg.get("vlan-raw-device"),
                 }
-                macaddr = ifcfg.get('mac_address', None)
+                macaddr = ifcfg.get("mac_address", None)
                 if macaddr is not None:
-                    vlan['macaddress'] = macaddr.lower()
+                    vlan["macaddress"] = macaddr.lower()
                 _extract_addresses(ifcfg, vlan, ifname, self.features)
                 vlans.update({ifname: vlan})
 
         # inject global nameserver values under each all interface which
         # has addresses and do not already have a DNS configuration
         if nameservers or searchdomains:
-            nscfg = {'addresses': nameservers, 'search': searchdomains}
+            nscfg = {"addresses": nameservers, "search": searchdomains}
             for section in [ethernets, wifis, bonds, bridges, vlans]:
                 for _name, cfg in section.items():
-                    if 'nameservers' in cfg or 'addresses' not in cfg:
+                    if "nameservers" in cfg or "addresses" not in cfg:
                         continue
-                    cfg.update({'nameservers': nscfg})
+                    cfg.update({"nameservers": nscfg})
 
         # workaround yaml dictionary key sorting when dumping
         def _render_section(name, section):
             if section:
-                dump = safeyaml.dumps({name: section},
-                                      explicit_start=False,
-                                      explicit_end=False,
-                                      noalias=True)
-                txt = util.indent(dump, ' ' * 4)
+                dump = safeyaml.dumps(
+                    {name: section},
+                    explicit_start=False,
+                    explicit_end=False,
+                    noalias=True,
+                )
+                txt = util.indent(dump, " " * 4)
                 return [txt]
             return []
 
         content.append("network:\n    version: 2\n")
-        content += _render_section('ethernets', ethernets)
-        content += _render_section('wifis', wifis)
-        content += _render_section('bonds', bonds)
-        content += _render_section('bridges', bridges)
-        content += _render_section('vlans', vlans)
+        content += _render_section("ethernets", ethernets)
+        content += _render_section("wifis", wifis)
+        content += _render_section("bonds", bonds)
+        content += _render_section("bridges", bridges)
+        content += _render_section("vlans", vlans)
 
         return "".join(content)
 
 
 def available(target=None):
-    expected = ['netplan']
-    search = ['/usr/sbin', '/sbin']
+    expected = ["netplan"]
+    search = ["/usr/sbin", "/sbin"]
     for p in expected:
         if not subp.which(p, search=search, target=target):
             return False
@@ -419,11 +446,13 @@ def available(target=None):
 
 def network_state_to_netplan(network_state, header=None):
     # render the provided network state, return a string of equivalent eni
-    netplan_path = 'etc/network/50-cloud-init.yaml'
-    renderer = Renderer({
-        'netplan_path': netplan_path,
-        'netplan_header': header,
-    })
+    netplan_path = "etc/network/50-cloud-init.yaml"
+    renderer = Renderer(
+        {
+            "netplan_path": netplan_path,
+            "netplan_header": header,
+        }
+    )
     if not header:
         header = ""
     if not header.endswith("\n"):
diff --git a/cloudinit/net/network_state.py b/cloudinit/net/network_state.py
index 4862bf91..d7c9144f 100644
--- a/cloudinit/net/network_state.py
+++ b/cloudinit/net/network_state.py
@@ -10,52 +10,70 @@ import logging
 import socket
 import struct
 
-from cloudinit import safeyaml
-from cloudinit import util
+from cloudinit import safeyaml, util
 
 LOG = logging.getLogger(__name__)
 
 NETWORK_STATE_VERSION = 1
-IPV6_DYNAMIC_TYPES = ['dhcp6',
-                      'ipv6_slaac',
-                      'ipv6_dhcpv6-stateless',
-                      'ipv6_dhcpv6-stateful']
+IPV6_DYNAMIC_TYPES = [
+    "dhcp6",
+    "ipv6_slaac",
+    "ipv6_dhcpv6-stateless",
+    "ipv6_dhcpv6-stateful",
+]
 NETWORK_STATE_REQUIRED_KEYS = {
-    1: ['version', 'config', 'network_state'],
+    1: ["version", "config", "network_state"],
 }
 NETWORK_V2_KEY_FILTER = [
-    'addresses', 'dhcp4', 'dhcp4-overrides', 'dhcp6', 'dhcp6-overrides',
-    'gateway4', 'gateway6', 'interfaces', 'match', 'mtu', 'nameservers',
-    'renderer', 'set-name', 'wakeonlan', 'accept-ra'
+    "addresses",
+    "dhcp4",
+    "dhcp4-overrides",
+    "dhcp6",
+    "dhcp6-overrides",
+    "gateway4",
+    "gateway6",
+    "interfaces",
+    "match",
+    "mtu",
+    "nameservers",
+    "renderer",
+    "set-name",
+    "wakeonlan",
+    "accept-ra",
 ]
 
 NET_CONFIG_TO_V2 = {
-    'bond': {'bond-ad-select': 'ad-select',
-             'bond-arp-interval': 'arp-interval',
-             'bond-arp-ip-target': 'arp-ip-target',
-             'bond-arp-validate': 'arp-validate',
-             'bond-downdelay': 'down-delay',
-             'bond-fail-over-mac': 'fail-over-mac-policy',
-             'bond-lacp-rate': 'lacp-rate',
-             'bond-miimon': 'mii-monitor-interval',
-             'bond-min-links': 'min-links',
-             'bond-mode': 'mode',
-             'bond-num-grat-arp': 'gratuitious-arp',
-             'bond-primary': 'primary',
-             'bond-primary-reselect': 'primary-reselect-policy',
-             'bond-updelay': 'up-delay',
-             'bond-xmit-hash-policy': 'transmit-hash-policy'},
-    'bridge': {'bridge_ageing': 'ageing-time',
-               'bridge_bridgeprio': 'priority',
-               'bridge_fd': 'forward-delay',
-               'bridge_gcint': None,
-               'bridge_hello': 'hello-time',
-               'bridge_maxage': 'max-age',
-               'bridge_maxwait': None,
-               'bridge_pathcost': 'path-cost',
-               'bridge_portprio': 'port-priority',
-               'bridge_stp': 'stp',
-               'bridge_waitport': None}}
+    "bond": {
+        "bond-ad-select": "ad-select",
+        "bond-arp-interval": "arp-interval",
+        "bond-arp-ip-target": "arp-ip-target",
+        "bond-arp-validate": "arp-validate",
+        "bond-downdelay": "down-delay",
+        "bond-fail-over-mac": "fail-over-mac-policy",
+        "bond-lacp-rate": "lacp-rate",
+        "bond-miimon": "mii-monitor-interval",
+        "bond-min-links": "min-links",
+        "bond-mode": "mode",
+        "bond-num-grat-arp": "gratuitious-arp",
+        "bond-primary": "primary",
+        "bond-primary-reselect": "primary-reselect-policy",
+        "bond-updelay": "up-delay",
+        "bond-xmit-hash-policy": "transmit-hash-policy",
+    },
+    "bridge": {
+        "bridge_ageing": "ageing-time",
+        "bridge_bridgeprio": "priority",
+        "bridge_fd": "forward-delay",
+        "bridge_gcint": None,
+        "bridge_hello": "hello-time",
+        "bridge_maxage": "max-age",
+        "bridge_maxwait": None,
+        "bridge_pathcost": "path-cost",
+        "bridge_portprio": "port-priority",
+        "bridge_stp": "stp",
+        "bridge_waitport": None,
+    },
+}
 
 
 def from_state_file(state_file):
@@ -77,17 +95,16 @@ class InvalidCommand(Exception):
 
 
 def ensure_command_keys(required_keys):
-
     def wrapper(func):
-
         @functools.wraps(func)
         def decorator(self, command, *args, **kwargs):
             if required_keys:
                 missing_keys = diff_keys(required_keys, command)
                 if missing_keys:
-                    raise InvalidCommand("Command missing %s of required"
-                                         " keys %s" % (missing_keys,
-                                                       required_keys))
+                    raise InvalidCommand(
+                        "Command missing %s of required keys %s"
+                        % (missing_keys, required_keys)
+                    )
             return func(self, command, *args, **kwargs)
 
         return decorator
@@ -102,29 +119,28 @@ class CommandHandlerMeta(type):
     'handle_' and on finding those will populate a class attribute mapping
     so that those methods can be quickly located and called.
     """
+
     def __new__(cls, name, parents, dct):
         command_handlers = {}
         for attr_name, attr in dct.items():
-            if callable(attr) and attr_name.startswith('handle_'):
-                handles_what = attr_name[len('handle_'):]
+            if callable(attr) and attr_name.startswith("handle_"):
+                handles_what = attr_name[len("handle_") :]
                 if handles_what:
                     command_handlers[handles_what] = attr
-        dct['command_handlers'] = command_handlers
-        return super(CommandHandlerMeta, cls).__new__(cls, name,
-                                                      parents, dct)
+        dct["command_handlers"] = command_handlers
+        return super(CommandHandlerMeta, cls).__new__(cls, name, parents, dct)
 
 
 class NetworkState(object):
-
     def __init__(self, network_state, version=NETWORK_STATE_VERSION):
         self._network_state = copy.deepcopy(network_state)
         self._version = version
-        self.use_ipv6 = network_state.get('use_ipv6', False)
+        self.use_ipv6 = network_state.get("use_ipv6", False)
         self._has_default_route = None
 
     @property
     def config(self):
-        return self._network_state['config']
+        return self._network_state["config"]
 
     @property
     def version(self):
@@ -133,14 +149,14 @@ class NetworkState(object):
     @property
     def dns_nameservers(self):
         try:
-            return self._network_state['dns']['nameservers']
+            return self._network_state["dns"]["nameservers"]
         except KeyError:
             return []
 
     @property
     def dns_searchdomains(self):
         try:
-            return self._network_state['dns']['search']
+            return self._network_state["dns"]["search"]
         except KeyError:
             return []
 
@@ -151,7 +167,7 @@ class NetworkState(object):
         return self._has_default_route
 
     def iter_interfaces(self, filter_func=None):
-        ifaces = self._network_state.get('interfaces', {})
+        ifaces = self._network_state.get("interfaces", {})
         for iface in ifaces.values():
             if filter_func is None:
                 yield iface
@@ -160,7 +176,7 @@ class NetworkState(object):
                     yield iface
 
     def iter_routes(self, filter_func=None):
-        for route in self._network_state.get('routes', []):
+        for route in self._network_state.get("routes", []):
             if filter_func is not None:
                 if filter_func(route):
                     yield route
@@ -172,38 +188,37 @@ class NetworkState(object):
             if self._is_default_route(route):
                 return True
         for iface in self.iter_interfaces():
-            for subnet in iface.get('subnets', []):
-                for route in subnet.get('routes', []):
+            for subnet in iface.get("subnets", []):
+                for route in subnet.get("routes", []):
                     if self._is_default_route(route):
                         return True
         return False
 
     def _is_default_route(self, route):
-        default_nets = ('::', '0.0.0.0')
+        default_nets = ("::", "0.0.0.0")
         return (
-            route.get('prefix') == 0
-            and route.get('network') in default_nets
+            route.get("prefix") == 0 and route.get("network") in default_nets
         )
 
 
 class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
 
     initial_network_state = {
-        'interfaces': {},
-        'routes': [],
-        'dns': {
-            'nameservers': [],
-            'search': [],
+        "interfaces": {},
+        "routes": [],
+        "dns": {
+            "nameservers": [],
+            "search": [],
         },
-        'use_ipv6': False,
-        'config': None,
+        "use_ipv6": False,
+        "config": None,
     }
 
     def __init__(self, version=NETWORK_STATE_VERSION, config=None):
         self._version = version
         self._config = config
         self._network_state = copy.deepcopy(self.initial_network_state)
-        self._network_state['config'] = config
+        self._network_state["config"] = config
         self._parsed = False
         self._interface_dns_map = {}
 
@@ -213,41 +228,41 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
 
     @property
     def use_ipv6(self):
-        return self._network_state.get('use_ipv6')
+        return self._network_state.get("use_ipv6")
 
     @use_ipv6.setter
     def use_ipv6(self, val):
-        self._network_state.update({'use_ipv6': val})
+        self._network_state.update({"use_ipv6": val})
 
     def dump(self):
         state = {
-            'version': self._version,
-            'config': self._config,
-            'network_state': self._network_state,
+            "version": self._version,
+            "config": self._config,
+            "network_state": self._network_state,
         }
         return safeyaml.dumps(state)
 
     def load(self, state):
-        if 'version' not in state:
-            LOG.error('Invalid state, missing version field')
-            raise ValueError('Invalid state, missing version field')
+        if "version" not in state:
+            LOG.error("Invalid state, missing version field")
+            raise ValueError("Invalid state, missing version field")
 
-        required_keys = NETWORK_STATE_REQUIRED_KEYS[state['version']]
+        required_keys = NETWORK_STATE_REQUIRED_KEYS[state["version"]]
         missing_keys = diff_keys(required_keys, state)
         if missing_keys:
-            msg = 'Invalid state, missing keys: %s' % (missing_keys)
+            msg = "Invalid state, missing keys: %s" % (missing_keys)
             LOG.error(msg)
             raise ValueError(msg)
 
         # v1 - direct attr mapping, except version
-        for key in [k for k in required_keys if k not in ['version']]:
+        for key in [k for k in required_keys if k not in ["version"]]:
             setattr(self, key, state[key])
 
     def dump_network_state(self):
         return safeyaml.dumps(self._network_state)
 
     def as_dict(self):
-        return {'version': self._version, 'config': self._config}
+        return {"version": self._version, "config": self._config}
 
     def get_network_state(self):
         ns = self.network_state
@@ -263,7 +278,7 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
 
     def parse_config_v1(self, skip_broken=True):
         for command in self._config:
-            command_type = command['type']
+            command_type = command["type"]
             try:
                 handler = self.command_handlers[command_type]
             except KeyError as e:
@@ -276,28 +291,29 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
                 if not skip_broken:
                     raise
                 else:
-                    LOG.warning("Skipping invalid command: %s", command,
-                                exc_info=True)
+                    LOG.warning(
+                        "Skipping invalid command: %s", command, exc_info=True
+                    )
                     LOG.debug(self.dump_network_state())
         for interface, dns in self._interface_dns_map.items():
             iface = None
             try:
-                iface = self._network_state['interfaces'][interface]
+                iface = self._network_state["interfaces"][interface]
             except KeyError as e:
                 raise ValueError(
-                    'Nameserver specified for interface {0}, '
-                    'but interface {0} does not exist!'.format(interface)
+                    "Nameserver specified for interface {0}, "
+                    "but interface {0} does not exist!".format(interface)
                 ) from e
             if iface:
                 nameservers, search = dns
-                iface['dns'] = {
-                    'addresses': nameservers,
-                    'search': search,
+                iface["dns"] = {
+                    "addresses": nameservers,
+                    "search": search,
                 }
 
     def parse_config_v2(self, skip_broken=True):
         for command_type, command in self._config.items():
-            if command_type in ['version', 'renderer']:
+            if command_type in ["version", "renderer"]:
                 continue
             try:
                 handler = self.command_handlers[command_type]
@@ -312,17 +328,18 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
                 if not skip_broken:
                     raise
                 else:
-                    LOG.warning("Skipping invalid command: %s", command,
-                                exc_info=True)
+                    LOG.warning(
+                        "Skipping invalid command: %s", command, exc_info=True
+                    )
                     LOG.debug(self.dump_network_state())
 
-    @ensure_command_keys(['name'])
+    @ensure_command_keys(["name"])
     def handle_loopback(self, command):
         return self.handle_physical(command)
 
-    @ensure_command_keys(['name'])
+    @ensure_command_keys(["name"])
     def handle_physical(self, command):
-        '''
+        """
         command = {
             'type': 'physical',
             'mac_address': 'c0:d6:9f:2c:e8:80',
@@ -332,119 +349,122 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
              ],
             'accept-ra': 'true'
         }
-        '''
+        """
 
-        interfaces = self._network_state.get('interfaces', {})
-        iface = interfaces.get(command['name'], {})
-        for param, val in command.get('params', {}).items():
+        interfaces = self._network_state.get("interfaces", {})
+        iface = interfaces.get(command["name"], {})
+        for param, val in command.get("params", {}).items():
             iface.update({param: val})
 
         # convert subnet ipv6 netmask to cidr as needed
-        subnets = _normalize_subnets(command.get('subnets'))
+        subnets = _normalize_subnets(command.get("subnets"))
 
         # automatically set 'use_ipv6' if any addresses are ipv6
         if not self.use_ipv6:
             for subnet in subnets:
-                if (subnet.get('type').endswith('6') or
-                        is_ipv6_addr(subnet.get('address'))):
+                if subnet.get("type").endswith("6") or is_ipv6_addr(
+                    subnet.get("address")
+                ):
                     self.use_ipv6 = True
                     break
 
-        accept_ra = command.get('accept-ra', None)
+        accept_ra = command.get("accept-ra", None)
         if accept_ra is not None:
             accept_ra = util.is_true(accept_ra)
-        wakeonlan = command.get('wakeonlan', None)
+        wakeonlan = command.get("wakeonlan", None)
         if wakeonlan is not None:
             wakeonlan = util.is_true(wakeonlan)
-        iface.update({
-            'name': command.get('name'),
-            'type': command.get('type'),
-            'mac_address': command.get('mac_address'),
-            'inet': 'inet',
-            'mode': 'manual',
-            'mtu': command.get('mtu'),
-            'address': None,
-            'gateway': None,
-            'subnets': subnets,
-            'accept-ra': accept_ra,
-            'wakeonlan': wakeonlan,
-        })
-        self._network_state['interfaces'].update({command.get('name'): iface})
+        iface.update(
+            {
+                "name": command.get("name"),
+                "type": command.get("type"),
+                "mac_address": command.get("mac_address"),
+                "inet": "inet",
+                "mode": "manual",
+                "mtu": command.get("mtu"),
+                "address": None,
+                "gateway": None,
+                "subnets": subnets,
+                "accept-ra": accept_ra,
+                "wakeonlan": wakeonlan,
+            }
+        )
+        self._network_state["interfaces"].update({command.get("name"): iface})
         self.dump_network_state()
 
-    @ensure_command_keys(['name', 'vlan_id', 'vlan_link'])
+    @ensure_command_keys(["name", "vlan_id", "vlan_link"])
     def handle_vlan(self, command):
-        '''
-            auto eth0.222
-            iface eth0.222 inet static
-                    address 10.10.10.1
-                    netmask 255.255.255.0
-                    hwaddress ether BC:76:4E:06:96:B3
-                    vlan-raw-device eth0
-        '''
-        interfaces = self._network_state.get('interfaces', {})
+        """
+        auto eth0.222
+        iface eth0.222 inet static
+                address 10.10.10.1
+                netmask 255.255.255.0
+                hwaddress ether BC:76:4E:06:96:B3
+                vlan-raw-device eth0
+        """
+        interfaces = self._network_state.get("interfaces", {})
         self.handle_physical(command)
-        iface = interfaces.get(command.get('name'), {})
-        iface['vlan-raw-device'] = command.get('vlan_link')
-        iface['vlan_id'] = command.get('vlan_id')
-        interfaces.update({iface['name']: iface})
+        iface = interfaces.get(command.get("name"), {})
+        iface["vlan-raw-device"] = command.get("vlan_link")
+        iface["vlan_id"] = command.get("vlan_id")
+        interfaces.update({iface["name"]: iface})
 
-    @ensure_command_keys(['name', 'bond_interfaces', 'params'])
+    @ensure_command_keys(["name", "bond_interfaces", "params"])
     def handle_bond(self, command):
-        '''
-    #/etc/network/interfaces
-    auto eth0
-    iface eth0 inet manual
-        bond-master bond0
-        bond-mode 802.3ad
-
-    auto eth1
-    iface eth1 inet manual
-        bond-master bond0
-        bond-mode 802.3ad
-
-    auto bond0
-    iface bond0 inet static
-         address 192.168.0.10
-         gateway 192.168.0.1
-         netmask 255.255.255.0
-         bond-slaves none
-         bond-mode 802.3ad
-         bond-miimon 100
-         bond-downdelay 200
-         bond-updelay 200
-         bond-lacp-rate 4
-        '''
+        """
+        #/etc/network/interfaces
+        auto eth0
+        iface eth0 inet manual
+            bond-master bond0
+            bond-mode 802.3ad
+
+        auto eth1
+        iface eth1 inet manual
+            bond-master bond0
+            bond-mode 802.3ad
+
+        auto bond0
+        iface bond0 inet static
+             address 192.168.0.10
+             gateway 192.168.0.1
+             netmask 255.255.255.0
+             bond-slaves none
+             bond-mode 802.3ad
+             bond-miimon 100
+             bond-downdelay 200
+             bond-updelay 200
+             bond-lacp-rate 4
+        """
 
         self.handle_physical(command)
-        interfaces = self._network_state.get('interfaces')
-        iface = interfaces.get(command.get('name'), {})
-        for param, val in command.get('params').items():
+        interfaces = self._network_state.get("interfaces")
+        iface = interfaces.get(command.get("name"), {})
+        for param, val in command.get("params").items():
             iface.update({param: val})
-        iface.update({'bond-slaves': 'none'})
-        self._network_state['interfaces'].update({iface['name']: iface})
+        iface.update({"bond-slaves": "none"})
+        self._network_state["interfaces"].update({iface["name"]: iface})
 
         # handle bond slaves
-        for ifname in command.get('bond_interfaces'):
+        for ifname in command.get("bond_interfaces"):
             if ifname not in interfaces:
                 cmd = {
-                    'name': ifname,
-                    'type': 'bond',
+                    "name": ifname,
+                    "type": "bond",
                 }
                 # inject placeholder
                 self.handle_physical(cmd)
 
-            interfaces = self._network_state.get('interfaces', {})
+            interfaces = self._network_state.get("interfaces", {})
             bond_if = interfaces.get(ifname)
-            bond_if['bond-master'] = command.get('name')
+            bond_if["bond-master"] = command.get("name")
             # copy in bond config into slave
-            for param, val in command.get('params').items():
+            for param, val in command.get("params").items():
                 bond_if.update({param: val})
-            self._network_state['interfaces'].update({ifname: bond_if})
+            self._network_state["interfaces"].update({ifname: bond_if})
 
-    @ensure_command_keys(['name', 'bridge_interfaces'])
+    @ensure_command_keys(["name", "bridge_interfaces"])
     def handle_bridge(self, command):
-        '''
+        """
             auto br0
             iface br0 inet static
                     address 10.10.10.1
@@ -469,89 +489,91 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
             "bridge_stp",
             "bridge_waitport",
         ]
-        '''
+        """
 
         # find one of the bridge port ifaces to get mac_addr
         # handle bridge_slaves
-        interfaces = self._network_state.get('interfaces', {})
-        for ifname in command.get('bridge_interfaces'):
+        interfaces = self._network_state.get("interfaces", {})
+        for ifname in command.get("bridge_interfaces"):
             if ifname in interfaces:
                 continue
 
             cmd = {
-                'name': ifname,
+                "name": ifname,
             }
             # inject placeholder
             self.handle_physical(cmd)
 
-        interfaces = self._network_state.get('interfaces', {})
+        interfaces = self._network_state.get("interfaces", {})
         self.handle_physical(command)
-        iface = interfaces.get(command.get('name'), {})
-        iface['bridge_ports'] = command['bridge_interfaces']
-        for param, val in command.get('params', {}).items():
+        iface = interfaces.get(command.get("name"), {})
+        iface["bridge_ports"] = command["bridge_interfaces"]
+        for param, val in command.get("params", {}).items():
             iface.update({param: val})
 
         # convert value to boolean
-        bridge_stp = iface.get('bridge_stp')
+        bridge_stp = iface.get("bridge_stp")
         if bridge_stp is not None and type(bridge_stp) != bool:
-            if bridge_stp in ['on', '1', 1]:
+            if bridge_stp in ["on", "1", 1]:
                 bridge_stp = True
-            elif bridge_stp in ['off', '0', 0]:
+            elif bridge_stp in ["off", "0", 0]:
                 bridge_stp = False
             else:
                 raise ValueError(
-                    'Cannot convert bridge_stp value ({stp}) to'
-                    ' boolean'.format(stp=bridge_stp))
-            iface.update({'bridge_stp': bridge_stp})
+                    "Cannot convert bridge_stp value ({stp}) to"
+                    " boolean".format(stp=bridge_stp)
+                )
+            iface.update({"bridge_stp": bridge_stp})
 
-        interfaces.update({iface['name']: iface})
+        interfaces.update({iface["name"]: iface})
 
-    @ensure_command_keys(['name'])
+    @ensure_command_keys(["name"])
     def handle_infiniband(self, command):
         self.handle_physical(command)
 
     def _parse_dns(self, command):
         nameservers = []
         search = []
-        if 'address' in command:
-            addrs = command['address']
+        if "address" in command:
+            addrs = command["address"]
             if not type(addrs) == list:
                 addrs = [addrs]
             for addr in addrs:
                 nameservers.append(addr)
-        if 'search' in command:
-            paths = command['search']
+        if "search" in command:
+            paths = command["search"]
             if not isinstance(paths, list):
                 paths = [paths]
             for path in paths:
                 search.append(path)
         return nameservers, search
 
-    @ensure_command_keys(['address'])
+    @ensure_command_keys(["address"])
     def handle_nameserver(self, command):
-        dns = self._network_state.get('dns')
+        dns = self._network_state.get("dns")
         nameservers, search = self._parse_dns(command)
-        if 'interface' in command:
-            self._interface_dns_map[command['interface']] = (
-                nameservers, search
+        if "interface" in command:
+            self._interface_dns_map[command["interface"]] = (
+                nameservers,
+                search,
             )
         else:
-            dns['nameservers'].extend(nameservers)
-            dns['search'].extend(search)
+            dns["nameservers"].extend(nameservers)
+            dns["search"].extend(search)
 
-    @ensure_command_keys(['address'])
+    @ensure_command_keys(["address"])
     def _handle_individual_nameserver(self, command, iface):
-        _iface = self._network_state.get('interfaces')
+        _iface = self._network_state.get("interfaces")
         nameservers, search = self._parse_dns(command)
-        _iface[iface]['dns'] = {'nameservers': nameservers, 'search': search}
+        _iface[iface]["dns"] = {"nameservers": nameservers, "search": search}
 
-    @ensure_command_keys(['destination'])
+    @ensure_command_keys(["destination"])
     def handle_route(self, command):
-        self._network_state['routes'].append(_normalize_route(command))
+        self._network_state["routes"].append(_normalize_route(command))
 
     # V2 handlers
     def handle_bonds(self, command):
-        '''
+        """
         v2_command = {
           bond0: {
             'interfaces': ['interface0', 'interface1'],
@@ -578,12 +600,12 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
             }
         }
 
-        '''
-        self._handle_bond_bridge(command, cmd_type='bond')
+        """
+        self._handle_bond_bridge(command, cmd_type="bond")
 
     def handle_bridges(self, command):
 
-        '''
+        """
         v2_command = {
           br0: {
             'interfaces': ['interface0', 'interface1'],
@@ -604,11 +626,11 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
             }
         }
 
-        '''
-        self._handle_bond_bridge(command, cmd_type='bridge')
+        """
+        self._handle_bond_bridge(command, cmd_type="bridge")
 
     def handle_ethernets(self, command):
-        '''
+        """
         ethernets:
           eno1:
             match:
@@ -644,34 +666,38 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
                 {'type': 'dhcp4'}
              ]
         }
-        '''
+        """
         for eth, cfg in command.items():
             phy_cmd = {
-                'type': 'physical',
-                'name': cfg.get('set-name', eth),
+                "type": "physical",
+                "name": cfg.get("set-name", eth),
             }
-            match = cfg.get('match', {})
-            mac_address = match.get('macaddress', None)
+            match = cfg.get("match", {})
+            mac_address = match.get("macaddress", None)
             if not mac_address:
-                LOG.debug('NetworkState Version2: missing "macaddress" info '
-                          'in config entry: %s: %s', eth, str(cfg))
-            phy_cmd['mac_address'] = mac_address
-            driver = match.get('driver', None)
+                LOG.debug(
+                    'NetworkState Version2: missing "macaddress" info '
+                    "in config entry: %s: %s",
+                    eth,
+                    str(cfg),
+                )
+            phy_cmd["mac_address"] = mac_address
+            driver = match.get("driver", None)
             if driver:
-                phy_cmd['params'] = {'driver': driver}
-            for key in ['mtu', 'match', 'wakeonlan', 'accept-ra']:
+                phy_cmd["params"] = {"driver": driver}
+            for key in ["mtu", "match", "wakeonlan", "accept-ra"]:
                 if key in cfg:
                     phy_cmd[key] = cfg[key]
 
             subnets = self._v2_to_v1_ipcfg(cfg)
             if len(subnets) > 0:
-                phy_cmd.update({'subnets': subnets})
+                phy_cmd.update({"subnets": subnets})
 
-            LOG.debug('v2(ethernets) -> v1(physical):\n%s', phy_cmd)
+            LOG.debug("v2(ethernets) -> v1(physical):\n%s", phy_cmd)
             self.handle_physical(phy_cmd)
 
     def handle_vlans(self, command):
-        '''
+        """
         v2_vlans = {
             'eth0.123': {
                 'id': 123,
@@ -687,41 +713,43 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
             'vlan_id': 123,
             'subnets': [{'type': 'dhcp4'}],
         }
-        '''
+        """
         for vlan, cfg in command.items():
             vlan_cmd = {
-                'type': 'vlan',
-                'name': vlan,
-                'vlan_id': cfg.get('id'),
-                'vlan_link': cfg.get('link'),
+                "type": "vlan",
+                "name": vlan,
+                "vlan_id": cfg.get("id"),
+                "vlan_link": cfg.get("link"),
             }
-            if 'mtu' in cfg:
-                vlan_cmd['mtu'] = cfg['mtu']
+            if "mtu" in cfg:
+                vlan_cmd["mtu"] = cfg["mtu"]
             subnets = self._v2_to_v1_ipcfg(cfg)
             if len(subnets) > 0:
-                vlan_cmd.update({'subnets': subnets})
-            LOG.debug('v2(vlans) -> v1(vlan):\n%s', vlan_cmd)
+                vlan_cmd.update({"subnets": subnets})
+            LOG.debug("v2(vlans) -> v1(vlan):\n%s", vlan_cmd)
             self.handle_vlan(vlan_cmd)
 
     def handle_wifis(self, command):
-        LOG.warning('Wifi configuration is only available to distros with'
-                    ' netplan rendering support.')
+        LOG.warning(
+            "Wifi configuration is only available to distros with"
+            " netplan rendering support."
+        )
 
     def _v2_common(self, cfg):
-        LOG.debug('v2_common: handling config:\n%s', cfg)
+        LOG.debug("v2_common: handling config:\n%s", cfg)
         for iface, dev_cfg in cfg.items():
-            if 'set-name' in dev_cfg:
-                set_name_iface = dev_cfg.get('set-name')
+            if "set-name" in dev_cfg:
+                set_name_iface = dev_cfg.get("set-name")
                 if set_name_iface:
                     iface = set_name_iface
-            if 'nameservers' in dev_cfg:
-                search = dev_cfg.get('nameservers').get('search', [])
-                dns = dev_cfg.get('nameservers').get('addresses', [])
-                name_cmd = {'type': 'nameserver'}
+            if "nameservers" in dev_cfg:
+                search = dev_cfg.get("nameservers").get("search", [])
+                dns = dev_cfg.get("nameservers").get("addresses", [])
+                name_cmd = {"type": "nameserver"}
                 if len(search) > 0:
-                    name_cmd.update({'search': search})
+                    name_cmd.update({"search": search})
                 if len(dns) > 0:
-                    name_cmd.update({'address': dns})
+                    name_cmd.update({"address": dns})
                 self.handle_nameserver(name_cmd)
                 self._handle_individual_nameserver(name_cmd, iface)
 
@@ -729,98 +757,110 @@ class NetworkStateInterpreter(metaclass=CommandHandlerMeta):
         """Common handler for bond and bridge types"""
 
         # inverse mapping for v2 keynames to v1 keynames
-        v2key_to_v1 = dict((v, k) for k, v in
-                           NET_CONFIG_TO_V2.get(cmd_type).items())
+        v2key_to_v1 = dict(
+            (v, k) for k, v in NET_CONFIG_TO_V2.get(cmd_type).items()
+        )
 
         for item_name, item_cfg in command.items():
-            item_params = dict((key, value) for (key, value) in
-                               item_cfg.items() if key not in
-                               NETWORK_V2_KEY_FILTER)
+            item_params = dict(
+                (key, value)
+                for (key, value) in item_cfg.items()
+                if key not in NETWORK_V2_KEY_FILTER
+            )
             # we accept the fixed spelling, but write the old for compatibility
             # Xenial does not have an updated netplan which supports the
             # correct spelling.  LP: #1756701
-            params = item_params.get('parameters', {})
-            grat_value = params.pop('gratuitous-arp', None)
+            params = item_params.get("parameters", {})
+            grat_value = params.pop("gratuitous-arp", None)
             if grat_value:
-                params['gratuitious-arp'] = grat_value
+                params["gratuitious-arp"] = grat_value
 
             v1_cmd = {
-                'type': cmd_type,
-                'name': item_name,
-                cmd_type + '_interfaces': item_cfg.get('interfaces'),
-                'params': dict((v2key_to_v1[k], v) for k, v in params.items())
+                "type": cmd_type,
+                "name": item_name,
+                cmd_type + "_interfaces": item_cfg.get("interfaces"),
+                "params": dict((v2key_to_v1[k], v) for k, v in params.items()),
             }
-            if 'mtu' in item_cfg:
-                v1_cmd['mtu'] = item_cfg['mtu']
+            if "mtu" in item_cfg:
+                v1_cmd["mtu"] = item_cfg["mtu"]
             subnets = self._v2_to_v1_ipcfg(item_cfg)
             if len(subnets) > 0:
-                v1_cmd.update({'subnets': subnets})
+                v1_cmd.update({"subnets": subnets})
 
-            LOG.debug('v2(%s) -> v1(%s):\n%s', cmd_type, cmd_type, v1_cmd)
+            LOG.debug("v2(%s) -> v1(%s):\n%s", cmd_type, cmd_type, v1_cmd)
             if cmd_type == "bridge":
                 self.handle_bridge(v1_cmd)
             elif cmd_type == "bond":
                 self.handle_bond(v1_cmd)
             else:
-                raise ValueError('Unknown command type: {cmd_type}'.format(
-                    cmd_type=cmd_type))
+                raise ValueError(
+                    "Unknown command type: {cmd_type}".format(
+                        cmd_type=cmd_type
+                    )
+                )
 
     def _v2_to_v1_ipcfg(self, cfg):
         """Common ipconfig extraction from v2 to v1 subnets array."""
 
         def _add_dhcp_overrides(overrides, subnet):
-            if 'route-metric' in overrides:
-                subnet['metric'] = overrides['route-metric']
+            if "route-metric" in overrides:
+                subnet["metric"] = overrides["route-metric"]
 
         subnets = []
-        if cfg.get('dhcp4'):
-            subnet = {'type': 'dhcp4'}
-            _add_dhcp_overrides(cfg.get('dhcp4-overrides', {}), subnet)
+        if cfg.get("dhcp4"):
+            subnet = {"type": "dhcp4"}
+            _add_dhcp_overrides(cfg.get("dhcp4-overrides", {}), subnet)
             subnets.append(subnet)
-        if cfg.get('dhcp6'):
-            subnet = {'type': 'dhcp6'}
+        if cfg.get("dhcp6"):
+            subnet = {"type": "dhcp6"}
             self.use_ipv6 = True
-            _add_dhcp_overrides(cfg.get('dhcp6-overrides', {}), subnet)
+            _add_dhcp_overrides(cfg.get("dhcp6-overrides", {}), subnet)
             subnets.append(subnet)
 
         gateway4 = None
         gateway6 = None
         nameservers = {}
-        for address in cfg.get('addresses', []):
+        for address in cfg.get("addresses", []):
             subnet = {
-                'type': 'static',
-                'address': address,
+                "type": "static",
+                "address": address,
             }
 
             if ":" in address:
-                if 'gateway6' in cfg and gateway6 is None:
-                    gateway6 = cfg.get('gateway6')
-                    subnet.update({'gateway': gateway6})
+                if "gateway6" in cfg and gateway6 is None:
+                    gateway6 = cfg.get("gateway6")
+                    subnet.update({"gateway": gateway6})
             else:
-                if 'gateway4' in cfg and gateway4 is None:
-                    gateway4 = cfg.get('gateway4')
-                    subnet.update({'gateway': gateway4})
+                if "gateway4" in cfg and gateway4 is None:
+                    gateway4 = cfg.get("gateway4")
+                    subnet.update({"gateway": gateway4})
 
-            if 'nameservers' in cfg and not nameservers:
-                addresses = cfg.get('nameservers').get('addresses')
+            if "nameservers" in cfg and not nameservers:
+                addresses = cfg.get("nameservers").get("addresses")
                 if addresses:
-                    nameservers['dns_nameservers'] = addresses
-                search = cfg.get('nameservers').get('search')
+                    nameservers["dns_nameservers"] = addresses
+                search = cfg.get("nameservers").get("search")
                 if search:
-                    nameservers['dns_search'] = search
+                    nameservers["dns_search"] = search
                 subnet.update(nameservers)
 
             subnets.append(subnet)
 
         routes = []
-        for route in cfg.get('routes', []):
-            routes.append(_normalize_route(
-                {'destination': route.get('to'), 'gateway': route.get('via')}))
+        for route in cfg.get("routes", []):
+            routes.append(
+                _normalize_route(
+                    {
+                        "destination": route.get("to"),
+                        "gateway": route.get("via"),
+                    }
+                )
+            )
 
         # v2 routes are bound to the interface, in v1 we add them under
         # the first subnet since there isn't an equivalent interface level.
         if len(subnets) and len(routes):
-            subnets[0]['routes'] = routes
+            subnets[0]["routes"] = routes
 
         return subnets
 
@@ -830,18 +870,25 @@ def _normalize_subnet(subnet):
     subnet = copy.deepcopy(subnet)
     normal_subnet = dict((k, v) for k, v in subnet.items() if v)
 
-    if subnet.get('type') in ('static', 'static6'):
+    if subnet.get("type") in ("static", "static6"):
         normal_subnet.update(
-            _normalize_net_keys(normal_subnet, address_keys=(
-                'address', 'ip_address',)))
-    normal_subnet['routes'] = [_normalize_route(r)
-                               for r in subnet.get('routes', [])]
+            _normalize_net_keys(
+                normal_subnet,
+                address_keys=(
+                    "address",
+                    "ip_address",
+                ),
+            )
+        )
+    normal_subnet["routes"] = [
+        _normalize_route(r) for r in subnet.get("routes", [])
+    ]
 
     def listify(snet, name):
         if name in snet and not isinstance(snet[name], list):
             snet[name] = snet[name].split()
 
-    for k in ('dns_search', 'dns_nameservers'):
+    for k in ("dns_search", "dns_nameservers"):
         listify(normal_subnet, k)
 
     return normal_subnet
@@ -865,15 +912,16 @@ def _normalize_net_keys(network, address_keys=()):
             addr_key = key
             break
     if not addr_key:
-        message = (
-            'No config network address keys [%s] found in %s' %
-            (','.join(address_keys), network))
+        message = "No config network address keys [%s] found in %s" % (
+            ",".join(address_keys),
+            network,
+        )
         LOG.error(message)
         raise ValueError(message)
 
     addr = net.get(addr_key)
     ipv6 = is_ipv6_addr(addr)
-    netmask = net.get('netmask')
+    netmask = net.get("netmask")
     if "/" in addr:
         addr_part, _, maybe_prefix = addr.partition("/")
         net[addr_key] = addr_part
@@ -884,23 +932,26 @@ def _normalize_net_keys(network, address_keys=()):
             prefix = mask_to_net_prefix(maybe_prefix)
     elif netmask:
         prefix = mask_to_net_prefix(netmask)
-    elif 'prefix' in net:
-        prefix = int(net['prefix'])
+    elif "prefix" in net:
+        prefix = int(net["prefix"])
     else:
         prefix = 64 if ipv6 else 24
 
-    if 'prefix' in net and str(net['prefix']) != str(prefix):
-        LOG.warning("Overwriting existing 'prefix' with '%s' in "
-                    "network info: %s", prefix, net)
-    net['prefix'] = prefix
+    if "prefix" in net and str(net["prefix"]) != str(prefix):
+        LOG.warning(
+            "Overwriting existing 'prefix' with '%s' in network info: %s",
+            prefix,
+            net,
+        )
+    net["prefix"] = prefix
 
     if ipv6:
         # TODO: we could/maybe should add this back with the very uncommon
         # 'netmask' for ipv6.  We need a 'net_prefix_to_ipv6_mask' for that.
-        if 'netmask' in net:
-            del net['netmask']
+        if "netmask" in net:
+            del net["netmask"]
     else:
-        net['netmask'] = net_prefix_to_ipv4_mask(net['prefix'])
+        net["netmask"] = net_prefix_to_ipv4_mask(net["prefix"])
 
     return net
 
@@ -913,25 +964,28 @@ def _normalize_route(route):
        'prefix': the network prefix for address as an integer.
        'metric': integer metric (only if present in input).
        'netmask': netmask (string) equivalent to prefix iff network is ipv4.
-       """
+    """
     # Prune None-value keys.  Specifically allow 0 (a valid metric).
-    normal_route = dict((k, v) for k, v in route.items()
-                        if v not in ("", None))
-    if 'destination' in normal_route:
-        normal_route['network'] = normal_route['destination']
-        del normal_route['destination']
+    normal_route = dict(
+        (k, v) for k, v in route.items() if v not in ("", None)
+    )
+    if "destination" in normal_route:
+        normal_route["network"] = normal_route["destination"]
+        del normal_route["destination"]
 
     normal_route.update(
         _normalize_net_keys(
-            normal_route, address_keys=('network', 'destination')))
+            normal_route, address_keys=("network", "destination")
+        )
+    )
 
-    metric = normal_route.get('metric')
+    metric = normal_route.get("metric")
     if metric:
         try:
-            normal_route['metric'] = int(metric)
+            normal_route["metric"] = int(metric)
         except ValueError as e:
             raise TypeError(
-                'Route config metric {} is not an integer'.format(metric)
+                "Route config metric {} is not an integer".format(metric)
             ) from e
     return normal_route
 
@@ -952,10 +1006,10 @@ def subnet_is_ipv6(subnet):
     """Common helper for checking network_state subnets for ipv6."""
     # 'static6', 'dhcp6', 'ipv6_dhcpv6-stateful', 'ipv6_dhcpv6-stateless' or
     # 'ipv6_slaac'
-    if subnet['type'].endswith('6') or subnet['type'] in IPV6_DYNAMIC_TYPES:
+    if subnet["type"].endswith("6") or subnet["type"] in IPV6_DYNAMIC_TYPES:
         # This is a request either static6 type or DHCPv6.
         return True
-    elif subnet['type'] == 'static' and is_ipv6_addr(subnet.get('address')):
+    elif subnet["type"] == "static" and is_ipv6_addr(subnet.get("address")):
         return True
     return False
 
@@ -967,7 +1021,8 @@ def net_prefix_to_ipv4_mask(prefix):
         24 -> "255.255.255.0"
     Also supports input as a string."""
     mask = socket.inet_ntoa(
-        struct.pack(">I", (0xffffffff << (32 - int(prefix)) & 0xffffffff)))
+        struct.pack(">I", (0xFFFFFFFF << (32 - int(prefix)) & 0xFFFFFFFF))
+    )
     return mask
 
 
@@ -990,14 +1045,14 @@ def ipv4_mask_to_net_prefix(mask):
     else:
         raise TypeError("mask '%s' is not a string or int")
 
-    if '.' not in mask:
+    if "." not in mask:
         raise ValueError("netmask '%s' does not contain a '.'" % mask)
 
     toks = mask.split(".")
     if len(toks) != 4:
         raise ValueError("netmask '%s' had only %d parts" % (mask, len(toks)))
 
-    return sum([bin(int(x)).count('1') for x in toks])
+    return sum([bin(int(x)).count("1") for x in toks])
 
 
 def ipv6_mask_to_net_prefix(mask):
@@ -1017,14 +1072,30 @@ def ipv6_mask_to_net_prefix(mask):
     else:
         raise TypeError("mask '%s' is not a string or int")
 
-    if ':' not in mask:
+    if ":" not in mask:
         raise ValueError("mask '%s' does not have a ':'")
 
-    bitCount = [0, 0x8000, 0xc000, 0xe000, 0xf000, 0xf800, 0xfc00, 0xfe00,
-                0xff00, 0xff80, 0xffc0, 0xffe0, 0xfff0, 0xfff8, 0xfffc,
-                0xfffe, 0xffff]
+    bitCount = [
+        0,
+        0x8000,
+        0xC000,
+        0xE000,
+        0xF000,
+        0xF800,
+        0xFC00,
+        0xFE00,
+        0xFF00,
+        0xFF80,
+        0xFFC0,
+        0xFFE0,
+        0xFFF0,
+        0xFFF8,
+        0xFFFC,
+        0xFFFE,
+        0xFFFF,
+    ]
     prefix = 0
-    for word in mask.split(':'):
+    for word in mask.split(":"):
         if not word or int(word, 16) == 0:
             break
         prefix += bitCount.index(int(word, 16))
@@ -1052,11 +1123,12 @@ def mask_and_ipv4_to_bcast_addr(mask, ip):
     """Calculate the broadcast address from the subnet mask and ip addr.
 
     Supports ipv4 only."""
-    ip_bin = int(''.join([bin(int(x) + 256)[3:] for x in ip.split('.')]), 2)
+    ip_bin = int("".join([bin(int(x) + 256)[3:] for x in ip.split(".")]), 2)
     mask_dec = ipv4_mask_to_net_prefix(mask)
-    bcast_bin = ip_bin | (2**(32 - mask_dec) - 1)
-    bcast_str = '.'.join([str(bcast_bin >> (i << 3) & 0xFF)
-                          for i in range(4)[::-1]])
+    bcast_bin = ip_bin | (2 ** (32 - mask_dec) - 1)
+    bcast_str = ".".join(
+        [str(bcast_bin >> (i << 3) & 0xFF) for i in range(4)[::-1]]
+    )
     return bcast_str
 
 
@@ -1066,8 +1138,8 @@ def parse_net_config_data(net_config, skip_broken=True) -> NetworkState:
     :param net_config: curtin network config dict
     """
     state = None
-    version = net_config.get('version')
-    config = net_config.get('config')
+    version = net_config.get("version")
+    config = net_config.get("config")
     if version == 2:
         # v2 does not have explicit 'config' key so we
         # pass the whole net-config as-is
diff --git a/cloudinit/net/networkd.py b/cloudinit/net/networkd.py
index c97c18f6..3bbeb284 100644
--- a/cloudinit/net/networkd.py
+++ b/cloudinit/net/networkd.py
@@ -8,56 +8,57 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import os
+from collections import OrderedDict
 
+from cloudinit import log as logging
+from cloudinit import subp, util
 
 from . import renderer
-from cloudinit import util
-from cloudinit import subp
-from cloudinit import log as logging
-from collections import OrderedDict
 
 LOG = logging.getLogger(__name__)
 
 
 class CfgParser:
     def __init__(self):
-        self.conf_dict = OrderedDict({
-            'Match': [],
-            'Link': [],
-            'Network': [],
-            'DHCPv4': [],
-            'DHCPv6': [],
-            'Address': [],
-            'Route': [],
-        })
+        self.conf_dict = OrderedDict(
+            {
+                "Match": [],
+                "Link": [],
+                "Network": [],
+                "DHCPv4": [],
+                "DHCPv6": [],
+                "Address": [],
+                "Route": [],
+            }
+        )
 
     def update_section(self, sec, key, val):
         for k in self.conf_dict.keys():
             if k == sec:
-                self.conf_dict[k].append(key+'='+str(val))
+                self.conf_dict[k].append(key + "=" + str(val))
                 # remove duplicates from list
                 self.conf_dict[k] = list(dict.fromkeys(self.conf_dict[k]))
                 self.conf_dict[k].sort()
 
     def get_final_conf(self):
-        contents = ''
+        contents = ""
         for k, v in sorted(self.conf_dict.items()):
             if not v:
                 continue
-            contents += '['+k+']\n'
+            contents += "[" + k + "]\n"
             for e in sorted(v):
-                contents += e + '\n'
-            contents += '\n'
+                contents += e + "\n"
+            contents += "\n"
 
         return contents
 
     def dump_data(self, target_fn):
         if not target_fn:
-            LOG.warning('Target file not given')
+            LOG.warning("Target file not given")
             return
 
         contents = self.get_final_conf()
-        LOG.debug('Final content: %s', contents)
+        LOG.debug("Final content: %s", contents)
         util.write_file(target_fn, contents)
 
 
@@ -72,17 +73,19 @@ class Renderer(renderer.Renderer):
     def __init__(self, config=None):
         if not config:
             config = {}
-        self.resolve_conf_fn = config.get('resolve_conf_fn',
-                                          '/etc/systemd/resolved.conf')
-        self.network_conf_dir = config.get('network_conf_dir',
-                                           '/etc/systemd/network/')
+        self.resolve_conf_fn = config.get(
+            "resolve_conf_fn", "/etc/systemd/resolved.conf"
+        )
+        self.network_conf_dir = config.get(
+            "network_conf_dir", "/etc/systemd/network/"
+        )
 
     def generate_match_section(self, iface, cfg):
-        sec = 'Match'
+        sec = "Match"
         match_dict = {
-            'name': 'Name',
-            'driver': 'Driver',
-            'mac_address': 'MACAddress'
+            "name": "Name",
+            "driver": "Driver",
+            "mac_address": "MACAddress",
         }
 
         if not iface:
@@ -92,125 +95,126 @@ class Renderer(renderer.Renderer):
             if k in iface and iface[k]:
                 cfg.update_section(sec, v, iface[k])
 
-        return iface['name']
+        return iface["name"]
 
     def generate_link_section(self, iface, cfg):
-        sec = 'Link'
+        sec = "Link"
 
         if not iface:
             return
 
-        if 'mtu' in iface and iface['mtu']:
-            cfg.update_section(sec, 'MTUBytes', iface['mtu'])
+        if "mtu" in iface and iface["mtu"]:
+            cfg.update_section(sec, "MTUBytes", iface["mtu"])
 
     def parse_routes(self, conf, cfg):
-        sec = 'Route'
+        sec = "Route"
         route_cfg_map = {
-            'gateway': 'Gateway',
-            'network': 'Destination',
-            'metric': 'Metric',
+            "gateway": "Gateway",
+            "network": "Destination",
+            "metric": "Metric",
         }
 
         # prefix is derived using netmask by network_state
-        prefix = ''
-        if 'prefix' in conf:
-            prefix = '/' + str(conf['prefix'])
+        prefix = ""
+        if "prefix" in conf:
+            prefix = "/" + str(conf["prefix"])
 
         for k, v in conf.items():
             if k not in route_cfg_map:
                 continue
-            if k == 'network':
+            if k == "network":
                 v += prefix
             cfg.update_section(sec, route_cfg_map[k], v)
 
     def parse_subnets(self, iface, cfg):
-        dhcp = 'no'
-        sec = 'Network'
-        for e in iface.get('subnets', []):
-            t = e['type']
-            if t == 'dhcp4' or t == 'dhcp':
-                if dhcp == 'no':
-                    dhcp = 'ipv4'
-                elif dhcp == 'ipv6':
-                    dhcp = 'yes'
-            elif t == 'dhcp6':
-                if dhcp == 'no':
-                    dhcp = 'ipv6'
-                elif dhcp == 'ipv4':
-                    dhcp = 'yes'
-            if 'routes' in e and e['routes']:
-                for i in e['routes']:
+        dhcp = "no"
+        sec = "Network"
+        for e in iface.get("subnets", []):
+            t = e["type"]
+            if t == "dhcp4" or t == "dhcp":
+                if dhcp == "no":
+                    dhcp = "ipv4"
+                elif dhcp == "ipv6":
+                    dhcp = "yes"
+            elif t == "dhcp6":
+                if dhcp == "no":
+                    dhcp = "ipv6"
+                elif dhcp == "ipv4":
+                    dhcp = "yes"
+            if "routes" in e and e["routes"]:
+                for i in e["routes"]:
                     self.parse_routes(i, cfg)
-            if 'address' in e:
+            if "address" in e:
                 subnet_cfg_map = {
-                    'address': 'Address',
-                    'gateway': 'Gateway',
-                    'dns_nameservers': 'DNS',
-                    'dns_search': 'Domains',
+                    "address": "Address",
+                    "gateway": "Gateway",
+                    "dns_nameservers": "DNS",
+                    "dns_search": "Domains",
                 }
                 for k, v in e.items():
-                    if k == 'address':
-                        if 'prefix' in e:
-                            v += '/' + str(e['prefix'])
-                        cfg.update_section('Address', subnet_cfg_map[k], v)
-                    elif k == 'gateway':
-                        cfg.update_section('Route', subnet_cfg_map[k], v)
-                    elif k == 'dns_nameservers' or k == 'dns_search':
-                        cfg.update_section(sec, subnet_cfg_map[k], ' '.join(v))
-
-        cfg.update_section(sec, 'DHCP', dhcp)
-
-        if (dhcp in ['ipv6', 'yes'] and
-                isinstance(iface.get('accept-ra', ''), bool)):
-            cfg.update_section(sec, 'IPv6AcceptRA', iface['accept-ra'])
+                    if k == "address":
+                        if "prefix" in e:
+                            v += "/" + str(e["prefix"])
+                        cfg.update_section("Address", subnet_cfg_map[k], v)
+                    elif k == "gateway":
+                        cfg.update_section("Route", subnet_cfg_map[k], v)
+                    elif k == "dns_nameservers" or k == "dns_search":
+                        cfg.update_section(sec, subnet_cfg_map[k], " ".join(v))
+
+        cfg.update_section(sec, "DHCP", dhcp)
+
+        if dhcp in ["ipv6", "yes"] and isinstance(
+            iface.get("accept-ra", ""), bool
+        ):
+            cfg.update_section(sec, "IPv6AcceptRA", iface["accept-ra"])
 
     # This is to accommodate extra keys present in VMware config
     def dhcp_domain(self, d, cfg):
-        for item in ['dhcp4domain', 'dhcp6domain']:
+        for item in ["dhcp4domain", "dhcp6domain"]:
             if item not in d:
                 continue
             ret = str(d[item]).casefold()
             try:
                 ret = util.translate_bool(ret)
-                ret = 'yes' if ret else 'no'
+                ret = "yes" if ret else "no"
             except ValueError:
-                if ret != 'route':
-                    LOG.warning('Invalid dhcp4domain value - %s', ret)
-                    ret = 'no'
-            if item == 'dhcp4domain':
-                section = 'DHCPv4'
+                if ret != "route":
+                    LOG.warning("Invalid dhcp4domain value - %s", ret)
+                    ret = "no"
+            if item == "dhcp4domain":
+                section = "DHCPv4"
             else:
-                section = 'DHCPv6'
-            cfg.update_section(section, 'UseDomains', ret)
+                section = "DHCPv6"
+            cfg.update_section(section, "UseDomains", ret)
 
     def parse_dns(self, iface, cfg, ns):
-        sec = 'Network'
+        sec = "Network"
 
         dns_cfg_map = {
-            'search': 'Domains',
-            'nameservers': 'DNS',
-            'addresses': 'DNS',
+            "search": "Domains",
+            "nameservers": "DNS",
+            "addresses": "DNS",
         }
 
-        dns = iface.get('dns')
+        dns = iface.get("dns")
         if not dns and ns.version == 1:
             dns = {
-                'search': ns.dns_searchdomains,
-                'nameservers': ns.dns_nameservers,
+                "search": ns.dns_searchdomains,
+                "nameservers": ns.dns_nameservers,
             }
         elif not dns and ns.version == 2:
             return
 
         for k, v in dns_cfg_map.items():
             if k in dns and dns[k]:
-                cfg.update_section(sec, v, ' '.join(dns[k]))
+                cfg.update_section(sec, v, " ".join(dns[k]))
 
     def create_network_file(self, link, conf, nwk_dir):
-        net_fn_owner = 'systemd-network'
+        net_fn_owner = "systemd-network"
 
-        LOG.debug('Setting Networking Config for %s', link)
+        LOG.debug("Setting Networking Config for %s", link)
 
-        net_fn = nwk_dir + '10-cloud-init-' + link + '.network'
+        net_fn = nwk_dir + "10-cloud-init-" + link + ".network"
         util.write_file(net_fn, conf)
         util.chownbyname(net_fn, net_fn_owner, net_fn_owner)
 
@@ -239,7 +243,7 @@ class Renderer(renderer.Renderer):
                 self.parse_routes(route, cfg)
 
             if ns.version == 2:
-                name = iface['name']
+                name = iface["name"]
                 # network state doesn't give dhcp domain info
                 # using ns.config as a workaround here
 
@@ -249,13 +253,13 @@ class Renderer(renderer.Renderer):
                 # set-name value that matches the current name, then update the
                 # current name to the device's name. That will be the value in
                 # the ns.config['ethernets'] dict below.
-                for dev_name, dev_cfg in ns.config['ethernets'].items():
-                    if 'set-name' in dev_cfg:
-                        if dev_cfg.get('set-name') == name:
+                for dev_name, dev_cfg in ns.config["ethernets"].items():
+                    if "set-name" in dev_cfg:
+                        if dev_cfg.get("set-name") == name:
                             name = dev_name
                             break
 
-                self.dhcp_domain(ns.config['ethernets'][name], cfg)
+                self.dhcp_domain(ns.config["ethernets"][name], cfg)
 
             ret_dict.update({link: cfg.get_final_conf()})
 
@@ -263,8 +267,8 @@ class Renderer(renderer.Renderer):
 
 
 def available(target=None):
-    expected = ['ip', 'systemctl']
-    search = ['/usr/sbin', '/bin']
+    expected = ["ip", "systemctl"]
+    search = ["/usr/sbin", "/bin"]
     for p in expected:
         if not subp.which(p, search=search, target=target):
             return False
diff --git a/cloudinit/net/openbsd.py b/cloudinit/net/openbsd.py
index d87d8a4f..da50d2ba 100644
--- a/cloudinit/net/openbsd.py
+++ b/cloudinit/net/openbsd.py
@@ -1,34 +1,31 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import log as logging
-from cloudinit import subp
-from cloudinit import util
 import cloudinit.net.bsd
+from cloudinit import log as logging
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
 
 class Renderer(cloudinit.net.bsd.BSDRenderer):
-
     def write_config(self):
         for device_name, v in self.interface_configurations.items():
-            if_file = 'etc/hostname.{}'.format(device_name)
+            if_file = "etc/hostname.{}".format(device_name)
             fn = subp.target_path(self.target, if_file)
             if device_name in self.dhcp_interfaces():
-                content = 'dhcp\n'
+                content = "dhcp\n"
             elif isinstance(v, dict):
                 try:
                     content = "inet {address} {netmask}".format(
-                        address=v['address'],
-                        netmask=v['netmask']
+                        address=v["address"], netmask=v["netmask"]
                     )
                 except KeyError:
                     LOG.error(
-                        "Invalid static configuration for %s",
-                        device_name)
+                        "Invalid static configuration for %s", device_name
+                    )
                 mtu = v.get("mtu")
                 if mtu:
-                    content += (' mtu %d' % mtu)
+                    content += " mtu %d" % mtu
                 content += "\n"
             util.write_file(fn, content)
 
@@ -36,16 +33,16 @@ class Renderer(cloudinit.net.bsd.BSDRenderer):
         if not self._postcmds:
             LOG.debug("openbsd generate postcmd disabled")
             return
-        subp.subp(['pkill', 'dhclient'], capture=True, rcs=[0, 1])
-        subp.subp(['route', 'del', 'default'], capture=True, rcs=[0, 1])
-        subp.subp(['route', 'flush', 'default'], capture=True, rcs=[0, 1])
-        subp.subp(['sh', '/etc/netstart'], capture=True)
+        subp.subp(["pkill", "dhclient"], capture=True, rcs=[0, 1])
+        subp.subp(["route", "del", "default"], capture=True, rcs=[0, 1])
+        subp.subp(["route", "flush", "default"], capture=True, rcs=[0, 1])
+        subp.subp(["sh", "/etc/netstart"], capture=True)
 
     def set_route(self, network, netmask, gateway):
-        if network == '0.0.0.0':
-            if_file = 'etc/mygate'
+        if network == "0.0.0.0":
+            if_file = "etc/mygate"
             fn = subp.target_path(self.target, if_file)
-            content = gateway + '\n'
+            content = gateway + "\n"
             util.write_file(fn, content)
 
 
diff --git a/cloudinit/net/renderer.py b/cloudinit/net/renderer.py
index 54a83b51..34b74b80 100644
--- a/cloudinit/net/renderer.py
+++ b/cloudinit/net/renderer.py
@@ -13,18 +13,18 @@ from cloudinit.net.udev import generate_udev_rule
 
 
 def filter_by_type(match_type):
-    return lambda iface: match_type == iface['type']
+    return lambda iface: match_type == iface["type"]
 
 
 def filter_by_name(match_name):
-    return lambda iface: match_name == iface['name']
+    return lambda iface: match_name == iface["name"]
 
 
 def filter_by_attr(match_name):
     return lambda iface: (match_name in iface and iface[match_name])
 
 
-filter_by_physical = filter_by_type('physical')
+filter_by_physical = filter_by_type("physical")
 
 
 class Renderer(object):
@@ -39,22 +39,27 @@ class Renderer(object):
         content = io.StringIO()
         for iface in network_state.iter_interfaces(filter_by_physical):
             # for physical interfaces write out a persist net udev rule
-            if 'name' in iface and iface.get('mac_address'):
-                driver = iface.get('driver', None)
-                content.write(generate_udev_rule(iface['name'],
-                                                 iface['mac_address'],
-                                                 driver=driver))
+            if "name" in iface and iface.get("mac_address"):
+                driver = iface.get("driver", None)
+                content.write(
+                    generate_udev_rule(
+                        iface["name"], iface["mac_address"], driver=driver
+                    )
+                )
         return content.getvalue()
 
     @abc.abstractmethod
-    def render_network_state(self, network_state, templates=None,
-                             target=None):
+    def render_network_state(self, network_state, templates=None, target=None):
         """Render network state."""
 
-    def render_network_config(self, network_config, templates=None,
-                              target=None):
+    def render_network_config(
+        self, network_config, templates=None, target=None
+    ):
         return self.render_network_state(
             network_state=parse_net_config_data(network_config),
-            templates=templates, target=target)
+            templates=templates,
+            target=target,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/net/renderers.py b/cloudinit/net/renderers.py
index 822b45de..c755f04c 100644
--- a/cloudinit/net/renderers.py
+++ b/cloudinit/net/renderers.py
@@ -2,15 +2,17 @@
 
 from typing import List, Tuple, Type
 
-from . import eni
-from . import freebsd
-from . import netbsd
-from . import netplan
-from . import networkd
-from . import renderer
-from . import RendererNotFoundError
-from . import openbsd
-from . import sysconfig
+from . import (
+    RendererNotFoundError,
+    eni,
+    freebsd,
+    netbsd,
+    netplan,
+    networkd,
+    openbsd,
+    renderer,
+    sysconfig,
+)
 
 NAME_TO_RENDERER = {
     "eni": eni,
@@ -22,8 +24,15 @@ NAME_TO_RENDERER = {
     "sysconfig": sysconfig,
 }
 
-DEFAULT_PRIORITY = ["eni", "sysconfig", "netplan", "freebsd",
-                    "netbsd", "openbsd", "networkd"]
+DEFAULT_PRIORITY = [
+    "eni",
+    "sysconfig",
+    "netplan",
+    "freebsd",
+    "netbsd",
+    "openbsd",
+    "networkd",
+]
 
 
 def search(
@@ -37,7 +46,8 @@ def search(
     unknown = [i for i in priority if i not in available]
     if unknown:
         raise ValueError(
-            "Unknown renderers provided in priority list: %s" % unknown)
+            "Unknown renderers provided in priority list: %s" % unknown
+        )
 
     found = []
     for name in priority:
@@ -60,8 +70,10 @@ def select(priority=None, target=None) -> Tuple[str, Type[renderer.Renderer]]:
         if target and target != "/":
             tmsg = " in target=%s" % target
         raise RendererNotFoundError(
-            "No available network renderers found%s. Searched "
-            "through list: %s" % (tmsg, priority))
+            "No available network renderers found%s. Searched through list: %s"
+            % (tmsg, priority)
+        )
     return found[0]
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/net/sysconfig.py b/cloudinit/net/sysconfig.py
index 85342219..997907bb 100644
--- a/cloudinit/net/sysconfig.py
+++ b/cloudinit/net/sysconfig.py
@@ -8,23 +8,35 @@ import re
 from configobj import ConfigObj
 
 from cloudinit import log as logging
-from cloudinit import util
-from cloudinit import subp
-from cloudinit.distros.parsers import networkmanager_conf
-from cloudinit.distros.parsers import resolv_conf
+from cloudinit import subp, util
+from cloudinit.distros.parsers import networkmanager_conf, resolv_conf
 
 from . import renderer
 from .network_state import (
-    is_ipv6_addr, net_prefix_to_ipv4_mask, subnet_is_ipv6, IPV6_DYNAMIC_TYPES)
+    IPV6_DYNAMIC_TYPES,
+    is_ipv6_addr,
+    net_prefix_to_ipv4_mask,
+    subnet_is_ipv6,
+)
 
 LOG = logging.getLogger(__name__)
-KNOWN_DISTROS = ['almalinux', 'centos', 'cloudlinux', 'eurolinux', 'fedora',
-                 'miraclelinux', 'openEuler', 'rhel', 'rocky', 'suse',
-                 'virtuozzo']
+KNOWN_DISTROS = [
+    "almalinux",
+    "centos",
+    "cloudlinux",
+    "eurolinux",
+    "fedora",
+    "miraclelinux",
+    "openEuler",
+    "rhel",
+    "rocky",
+    "suse",
+    "virtuozzo",
+]
 NM_CFG_FILE = "/etc/NetworkManager/NetworkManager.conf"
 
 
-def _make_header(sep='#'):
+def _make_header(sep="#"):
     lines = [
         "Created by cloud-init on instance boot automatically, do not edit.",
         "",
@@ -38,8 +50,8 @@ def _make_header(sep='#'):
 
 
 def _is_default_route(route):
-    default_nets = ('::', '0.0.0.0')
-    return route['prefix'] == 0 and route['network'] in default_nets
+    default_nets = ("::", "0.0.0.0")
+    return route["prefix"] == 0 and route["network"] in default_nets
 
 
 def _quote_value(value):
@@ -56,19 +68,19 @@ def _quote_value(value):
 def enable_ifcfg_rh(path):
     """Add ifcfg-rh to NetworkManager.cfg plugins if main section is present"""
     config = ConfigObj(path)
-    if 'main' in config:
-        if 'plugins' in config['main']:
-            if 'ifcfg-rh' in config['main']['plugins']:
+    if "main" in config:
+        if "plugins" in config["main"]:
+            if "ifcfg-rh" in config["main"]["plugins"]:
                 return
         else:
-            config['main']['plugins'] = []
+            config["main"]["plugins"] = []
 
-        if isinstance(config['main']['plugins'], list):
-            config['main']['plugins'].append('ifcfg-rh')
+        if isinstance(config["main"]["plugins"], list):
+            config["main"]["plugins"].append("ifcfg-rh")
         else:
-            config['main']['plugins'] = [config['main']['plugins'], 'ifcfg-rh']
+            config["main"]["plugins"] = [config["main"]["plugins"], "ifcfg-rh"]
         config.write()
-        LOG.debug('Enabled ifcfg-rh NetworkManager plugins')
+        LOG.debug("Enabled ifcfg-rh NetworkManager plugins")
 
 
 class ConfigMap(object):
@@ -76,8 +88,8 @@ class ConfigMap(object):
 
     # Why does redhat prefer yes/no to true/false??
     _bool_map = {
-        True: 'yes',
-        False: 'no',
+        True: "yes",
+        False: "no",
     }
 
     def __init__(self):
@@ -128,8 +140,7 @@ class ConfigMap(object):
 class Route(ConfigMap):
     """Represents a route configuration."""
 
-    def __init__(self, route_name, base_sysconf_dir,
-                 ipv4_tpl, ipv6_tpl):
+    def __init__(self, route_name, base_sysconf_dir, ipv4_tpl, ipv6_tpl):
         super(Route, self).__init__()
         self.last_idx = 1
         self.has_set_default_ipv4 = False
@@ -140,8 +151,12 @@ class Route(ConfigMap):
         self.route_fn_tpl_ipv6 = ipv6_tpl
 
     def copy(self):
-        r = Route(self._route_name, self._base_sysconf_dir,
-                  self.route_fn_tpl_ipv4, self.route_fn_tpl_ipv6)
+        r = Route(
+            self._route_name,
+            self._base_sysconf_dir,
+            self.route_fn_tpl_ipv4,
+            self.route_fn_tpl_ipv6,
+        )
         r._conf = self._conf.copy()
         r.last_idx = self.last_idx
         r.has_set_default_ipv4 = self.has_set_default_ipv4
@@ -150,20 +165,22 @@ class Route(ConfigMap):
 
     @property
     def path_ipv4(self):
-        return self.route_fn_tpl_ipv4 % ({'base': self._base_sysconf_dir,
-                                          'name': self._route_name})
+        return self.route_fn_tpl_ipv4 % (
+            {"base": self._base_sysconf_dir, "name": self._route_name}
+        )
 
     @property
     def path_ipv6(self):
-        return self.route_fn_tpl_ipv6 % ({'base': self._base_sysconf_dir,
-                                          'name': self._route_name})
+        return self.route_fn_tpl_ipv6 % (
+            {"base": self._base_sysconf_dir, "name": self._route_name}
+        )
 
     def is_ipv6_route(self, address):
-        return ':' in address
+        return ":" in address
 
     def to_string(self, proto="ipv4"):
         # only accept ipv4 and ipv6
-        if proto not in ['ipv4', 'ipv6']:
+        if proto not in ["ipv4", "ipv6"]:
             raise ValueError("Unknown protocol '%s'" % (str(proto)))
         buf = io.StringIO()
         buf.write(_make_header())
@@ -173,8 +190,8 @@ class Route(ConfigMap):
         # (because Route can contain a mix of IPv4 and IPv6)
         reindex = -1
         for key in sorted(self._conf.keys()):
-            if 'ADDRESS' in key:
-                index = key.replace('ADDRESS', '')
+            if "ADDRESS" in key:
+                index = key.replace("ADDRESS", "")
                 address_value = str(self._conf[key])
                 # only accept combinations:
                 # if proto ipv6 only display ipv6 routes
@@ -183,33 +200,59 @@ class Route(ConfigMap):
                 # do not add ipv4 routes if proto is ipv6
                 # (this array will contain a mix of ipv4 and ipv6)
                 if proto == "ipv4" and not self.is_ipv6_route(address_value):
-                    netmask_value = str(self._conf['NETMASK' + index])
-                    gateway_value = str(self._conf['GATEWAY' + index])
+                    netmask_value = str(self._conf["NETMASK" + index])
+                    gateway_value = str(self._conf["GATEWAY" + index])
                     # increase IPv4 index
                     reindex = reindex + 1
-                    buf.write("%s=%s\n" % ('ADDRESS' + str(reindex),
-                                           _quote_value(address_value)))
-                    buf.write("%s=%s\n" % ('GATEWAY' + str(reindex),
-                                           _quote_value(gateway_value)))
-                    buf.write("%s=%s\n" % ('NETMASK' + str(reindex),
-                                           _quote_value(netmask_value)))
-                    metric_key = 'METRIC' + index
+                    buf.write(
+                        "%s=%s\n"
+                        % (
+                            "ADDRESS" + str(reindex),
+                            _quote_value(address_value),
+                        )
+                    )
+                    buf.write(
+                        "%s=%s\n"
+                        % (
+                            "GATEWAY" + str(reindex),
+                            _quote_value(gateway_value),
+                        )
+                    )
+                    buf.write(
+                        "%s=%s\n"
+                        % (
+                            "NETMASK" + str(reindex),
+                            _quote_value(netmask_value),
+                        )
+                    )
+                    metric_key = "METRIC" + index
                     if metric_key in self._conf:
-                        metric_value = str(self._conf['METRIC' + index])
-                        buf.write("%s=%s\n" % ('METRIC' + str(reindex),
-                                               _quote_value(metric_value)))
+                        metric_value = str(self._conf["METRIC" + index])
+                        buf.write(
+                            "%s=%s\n"
+                            % (
+                                "METRIC" + str(reindex),
+                                _quote_value(metric_value),
+                            )
+                        )
                 elif proto == "ipv6" and self.is_ipv6_route(address_value):
-                    netmask_value = str(self._conf['NETMASK' + index])
-                    gateway_value = str(self._conf['GATEWAY' + index])
+                    netmask_value = str(self._conf["NETMASK" + index])
+                    gateway_value = str(self._conf["GATEWAY" + index])
                     metric_value = (
-                        'metric ' + str(self._conf['METRIC' + index])
-                        if 'METRIC' + index in self._conf else '')
+                        "metric " + str(self._conf["METRIC" + index])
+                        if "METRIC" + index in self._conf
+                        else ""
+                    )
                     buf.write(
-                        "%s/%s via %s %s dev %s\n" % (address_value,
-                                                      netmask_value,
-                                                      gateway_value,
-                                                      metric_value,
-                                                      self._route_name))
+                        "%s/%s via %s %s dev %s\n"
+                        % (
+                            address_value,
+                            netmask_value,
+                            gateway_value,
+                            metric_value,
+                            self._route_name,
+                        )
+                    )
 
         return buf.getvalue()
 
@@ -218,27 +261,31 @@ class NetInterface(ConfigMap):
     """Represents a sysconfig/networking-script (and its config + children)."""
 
     iface_types = {
-        'ethernet': 'Ethernet',
-        'bond': 'Bond',
-        'bridge': 'Bridge',
-        'infiniband': 'InfiniBand',
-        'vlan': 'Vlan',
+        "ethernet": "Ethernet",
+        "bond": "Bond",
+        "bridge": "Bridge",
+        "infiniband": "InfiniBand",
+        "vlan": "Vlan",
     }
 
-    def __init__(self, iface_name, base_sysconf_dir, templates,
-                 kind='ethernet'):
+    def __init__(
+        self, iface_name, base_sysconf_dir, templates, kind="ethernet"
+    ):
         super(NetInterface, self).__init__()
         self.children = []
         self.templates = templates
-        route_tpl = self.templates.get('route_templates')
-        self.routes = Route(iface_name, base_sysconf_dir,
-                            ipv4_tpl=route_tpl.get('ipv4'),
-                            ipv6_tpl=route_tpl.get('ipv6'))
-        self.iface_fn_tpl = self.templates.get('iface_templates')
+        route_tpl = self.templates.get("route_templates")
+        self.routes = Route(
+            iface_name,
+            base_sysconf_dir,
+            ipv4_tpl=route_tpl.get("ipv4"),
+            ipv6_tpl=route_tpl.get("ipv6"),
+        )
+        self.iface_fn_tpl = self.templates.get("iface_templates")
         self.kind = kind
 
         self._iface_name = iface_name
-        self._conf['DEVICE'] = iface_name
+        self._conf["DEVICE"] = iface_name
         self._base_sysconf_dir = base_sysconf_dir
 
     @property
@@ -248,7 +295,7 @@ class NetInterface(ConfigMap):
     @name.setter
     def name(self, iface_name):
         self._iface_name = iface_name
-        self._conf['DEVICE'] = iface_name
+        self._conf["DEVICE"] = iface_name
 
     @property
     def kind(self):
@@ -259,16 +306,18 @@ class NetInterface(ConfigMap):
         if kind not in self.iface_types:
             raise ValueError(kind)
         self._kind = kind
-        self._conf['TYPE'] = self.iface_types[kind]
+        self._conf["TYPE"] = self.iface_types[kind]
 
     @property
     def path(self):
-        return self.iface_fn_tpl % ({'base': self._base_sysconf_dir,
-                                     'name': self.name})
+        return self.iface_fn_tpl % (
+            {"base": self._base_sysconf_dir, "name": self.name}
+        )
 
     def copy(self, copy_children=False, copy_routes=False):
-        c = NetInterface(self.name, self._base_sysconf_dir,
-                         self.templates, kind=self._kind)
+        c = NetInterface(
+            self.name, self._base_sysconf_dir, self.templates, kind=self._kind
+        )
         c._conf = self._conf.copy()
         if copy_children:
             c.children = list(self.children)
@@ -277,7 +326,7 @@ class NetInterface(ConfigMap):
         return c
 
     def skip_key_value(self, key, val):
-        if key == 'TYPE' and val == 'Vlan':
+        if key == "TYPE" and val == "Vlan":
             return True
         return False
 
@@ -291,166 +340,180 @@ class Renderer(renderer.Renderer):
     #                                         details about this)
 
     iface_defaults = {
-        'rhel': {'ONBOOT': True, 'USERCTL': False, 'NM_CONTROLLED': False,
-                 'BOOTPROTO': 'none'},
-        'suse': {'BOOTPROTO': 'static', 'STARTMODE': 'auto'},
+        "rhel": {
+            "ONBOOT": True,
+            "USERCTL": False,
+            "NM_CONTROLLED": False,
+            "BOOTPROTO": "none",
+        },
+        "suse": {"BOOTPROTO": "static", "STARTMODE": "auto"},
     }
 
     cfg_key_maps = {
-        'rhel': {
-            'accept-ra': 'IPV6_FORCE_ACCEPT_RA',
-            'bridge_stp': 'STP',
-            'bridge_ageing': 'AGEING',
-            'bridge_bridgeprio': 'PRIO',
-            'mac_address': 'HWADDR',
-            'mtu': 'MTU',
+        "rhel": {
+            "accept-ra": "IPV6_FORCE_ACCEPT_RA",
+            "bridge_stp": "STP",
+            "bridge_ageing": "AGEING",
+            "bridge_bridgeprio": "PRIO",
+            "mac_address": "HWADDR",
+            "mtu": "MTU",
         },
-        'suse': {
-            'bridge_stp': 'BRIDGE_STP',
-            'bridge_ageing': 'BRIDGE_AGEINGTIME',
-            'bridge_bridgeprio': 'BRIDGE_PRIORITY',
-            'mac_address': 'LLADDR',
-            'mtu': 'MTU',
+        "suse": {
+            "bridge_stp": "BRIDGE_STP",
+            "bridge_ageing": "BRIDGE_AGEINGTIME",
+            "bridge_bridgeprio": "BRIDGE_PRIORITY",
+            "mac_address": "LLADDR",
+            "mtu": "MTU",
         },
     }
 
     # If these keys exist, then their values will be used to form
     # a BONDING_OPTS / BONDING_MODULE_OPTS grouping; otherwise no
     # grouping will be set.
-    bond_tpl_opts = tuple([
-        ('bond_mode', "mode=%s"),
-        ('bond_xmit_hash_policy', "xmit_hash_policy=%s"),
-        ('bond_miimon', "miimon=%s"),
-        ('bond_min_links', "min_links=%s"),
-        ('bond_arp_interval', "arp_interval=%s"),
-        ('bond_arp_ip_target', "arp_ip_target=%s"),
-        ('bond_arp_validate', "arp_validate=%s"),
-        ('bond_ad_select', "ad_select=%s"),
-        ('bond_num_grat_arp', "num_grat_arp=%s"),
-        ('bond_downdelay', "downdelay=%s"),
-        ('bond_updelay', "updelay=%s"),
-        ('bond_lacp_rate', "lacp_rate=%s"),
-        ('bond_fail_over_mac', "fail_over_mac=%s"),
-        ('bond_primary', "primary=%s"),
-        ('bond_primary_reselect', "primary_reselect=%s"),
-    ])
+    bond_tpl_opts = tuple(
+        [
+            ("bond_mode", "mode=%s"),
+            ("bond_xmit_hash_policy", "xmit_hash_policy=%s"),
+            ("bond_miimon", "miimon=%s"),
+            ("bond_min_links", "min_links=%s"),
+            ("bond_arp_interval", "arp_interval=%s"),
+            ("bond_arp_ip_target", "arp_ip_target=%s"),
+            ("bond_arp_validate", "arp_validate=%s"),
+            ("bond_ad_select", "ad_select=%s"),
+            ("bond_num_grat_arp", "num_grat_arp=%s"),
+            ("bond_downdelay", "downdelay=%s"),
+            ("bond_updelay", "updelay=%s"),
+            ("bond_lacp_rate", "lacp_rate=%s"),
+            ("bond_fail_over_mac", "fail_over_mac=%s"),
+            ("bond_primary", "primary=%s"),
+            ("bond_primary_reselect", "primary_reselect=%s"),
+        ]
+    )
 
     templates = {}
 
     def __init__(self, config=None):
         if not config:
             config = {}
-        self.sysconf_dir = config.get('sysconf_dir', 'etc/sysconfig')
+        self.sysconf_dir = config.get("sysconf_dir", "etc/sysconfig")
         self.netrules_path = config.get(
-            'netrules_path', 'etc/udev/rules.d/70-persistent-net.rules')
-        self.dns_path = config.get('dns_path', 'etc/resolv.conf')
-        nm_conf_path = 'etc/NetworkManager/conf.d/99-cloud-init.conf'
-        self.networkmanager_conf_path = config.get('networkmanager_conf_path',
-                                                   nm_conf_path)
+            "netrules_path", "etc/udev/rules.d/70-persistent-net.rules"
+        )
+        self.dns_path = config.get("dns_path", "etc/resolv.conf")
+        nm_conf_path = "etc/NetworkManager/conf.d/99-cloud-init.conf"
+        self.networkmanager_conf_path = config.get(
+            "networkmanager_conf_path", nm_conf_path
+        )
         self.templates = {
-            'control': config.get('control'),
-            'iface_templates': config.get('iface_templates'),
-            'route_templates': config.get('route_templates'),
+            "control": config.get("control"),
+            "iface_templates": config.get("iface_templates"),
+            "route_templates": config.get("route_templates"),
         }
-        self.flavor = config.get('flavor', 'rhel')
+        self.flavor = config.get("flavor", "rhel")
 
     @classmethod
     def _render_iface_shared(cls, iface, iface_cfg, flavor):
         flavor_defaults = copy.deepcopy(cls.iface_defaults.get(flavor, {}))
         iface_cfg.update(flavor_defaults)
 
-        for old_key in ('mac_address', 'mtu', 'accept-ra'):
+        for old_key in ("mac_address", "mtu", "accept-ra"):
             old_value = iface.get(old_key)
             if old_value is not None:
                 # only set HWADDR on physical interfaces
-                if (old_key == 'mac_address' and
-                   iface['type'] not in ['physical', 'infiniband']):
+                if old_key == "mac_address" and iface["type"] not in [
+                    "physical",
+                    "infiniband",
+                ]:
                     continue
                 new_key = cls.cfg_key_maps[flavor].get(old_key)
                 if new_key:
                     iface_cfg[new_key] = old_value
 
         # only set WakeOnLan for physical interfaces
-        if ('wakeonlan' in iface and iface['wakeonlan'] and
-                iface['type'] == 'physical'):
-            iface_cfg['ETHTOOL_OPTS'] = 'wol g'
+        if (
+            "wakeonlan" in iface
+            and iface["wakeonlan"]
+            and iface["type"] == "physical"
+        ):
+            iface_cfg["ETHTOOL_OPTS"] = "wol g"
 
     @classmethod
     def _render_subnets(cls, iface_cfg, subnets, has_default_route, flavor):
         # setting base values
-        if flavor == 'suse':
-            iface_cfg['BOOTPROTO'] = 'static'
-            if 'BRIDGE' in iface_cfg:
-                iface_cfg['BOOTPROTO'] = 'dhcp'
-                iface_cfg.drop('BRIDGE')
+        if flavor == "suse":
+            iface_cfg["BOOTPROTO"] = "static"
+            if "BRIDGE" in iface_cfg:
+                iface_cfg["BOOTPROTO"] = "dhcp"
+                iface_cfg.drop("BRIDGE")
         else:
-            iface_cfg['BOOTPROTO'] = 'none'
+            iface_cfg["BOOTPROTO"] = "none"
 
         # modifying base values according to subnets
         for i, subnet in enumerate(subnets, start=len(iface_cfg.children)):
-            mtu_key = 'MTU'
-            subnet_type = subnet.get('type')
-            if subnet_type == 'dhcp6' or subnet_type == 'ipv6_dhcpv6-stateful':
-                if flavor == 'suse':
+            mtu_key = "MTU"
+            subnet_type = subnet.get("type")
+            if subnet_type == "dhcp6" or subnet_type == "ipv6_dhcpv6-stateful":
+                if flavor == "suse":
                     # User wants dhcp for both protocols
-                    if iface_cfg['BOOTPROTO'] == 'dhcp4':
-                        iface_cfg['BOOTPROTO'] = 'dhcp'
+                    if iface_cfg["BOOTPROTO"] == "dhcp4":
+                        iface_cfg["BOOTPROTO"] = "dhcp"
                     else:
                         # Only IPv6 is DHCP, IPv4 may be static
-                        iface_cfg['BOOTPROTO'] = 'dhcp6'
-                    iface_cfg['DHCLIENT6_MODE'] = 'managed'
+                        iface_cfg["BOOTPROTO"] = "dhcp6"
+                    iface_cfg["DHCLIENT6_MODE"] = "managed"
                 # only if rhel AND dhcpv6 stateful
-                elif (flavor == 'rhel' and
-                        subnet_type == 'ipv6_dhcpv6-stateful'):
-                    iface_cfg['BOOTPROTO'] = 'dhcp'
-                    iface_cfg['DHCPV6C'] = True
-                    iface_cfg['IPV6INIT'] = True
-                    iface_cfg['IPV6_AUTOCONF'] = False
+                elif (
+                    flavor == "rhel" and subnet_type == "ipv6_dhcpv6-stateful"
+                ):
+                    iface_cfg["BOOTPROTO"] = "dhcp"
+                    iface_cfg["DHCPV6C"] = True
+                    iface_cfg["IPV6INIT"] = True
+                    iface_cfg["IPV6_AUTOCONF"] = False
                 else:
-                    iface_cfg['IPV6INIT'] = True
+                    iface_cfg["IPV6INIT"] = True
                     # Configure network settings using DHCPv6
-                    iface_cfg['DHCPV6C'] = True
-            elif subnet_type == 'ipv6_dhcpv6-stateless':
-                if flavor == 'suse':
+                    iface_cfg["DHCPV6C"] = True
+            elif subnet_type == "ipv6_dhcpv6-stateless":
+                if flavor == "suse":
                     # User wants dhcp for both protocols
-                    if iface_cfg['BOOTPROTO'] == 'dhcp4':
-                        iface_cfg['BOOTPROTO'] = 'dhcp'
+                    if iface_cfg["BOOTPROTO"] == "dhcp4":
+                        iface_cfg["BOOTPROTO"] = "dhcp"
                     else:
                         # Only IPv6 is DHCP, IPv4 may be static
-                        iface_cfg['BOOTPROTO'] = 'dhcp6'
-                    iface_cfg['DHCLIENT6_MODE'] = 'info'
+                        iface_cfg["BOOTPROTO"] = "dhcp6"
+                    iface_cfg["DHCLIENT6_MODE"] = "info"
                 else:
-                    iface_cfg['IPV6INIT'] = True
+                    iface_cfg["IPV6INIT"] = True
                     # Configure network settings using SLAAC from RAs and
                     # optional info from dhcp server using DHCPv6
-                    iface_cfg['IPV6_AUTOCONF'] = True
-                    iface_cfg['DHCPV6C'] = True
+                    iface_cfg["IPV6_AUTOCONF"] = True
+                    iface_cfg["DHCPV6C"] = True
                     # Use Information-request to get only stateless
                     # configuration parameters (i.e., without address).
-                    iface_cfg['DHCPV6C_OPTIONS'] = '-S'
-            elif subnet_type == 'ipv6_slaac':
-                if flavor == 'suse':
+                    iface_cfg["DHCPV6C_OPTIONS"] = "-S"
+            elif subnet_type == "ipv6_slaac":
+                if flavor == "suse":
                     # User wants dhcp for both protocols
-                    if iface_cfg['BOOTPROTO'] == 'dhcp4':
-                        iface_cfg['BOOTPROTO'] = 'dhcp'
+                    if iface_cfg["BOOTPROTO"] == "dhcp4":
+                        iface_cfg["BOOTPROTO"] = "dhcp"
                     else:
                         # Only IPv6 is DHCP, IPv4 may be static
-                        iface_cfg['BOOTPROTO'] = 'dhcp6'
-                    iface_cfg['DHCLIENT6_MODE'] = 'info'
+                        iface_cfg["BOOTPROTO"] = "dhcp6"
+                    iface_cfg["DHCLIENT6_MODE"] = "info"
                 else:
-                    iface_cfg['IPV6INIT'] = True
+                    iface_cfg["IPV6INIT"] = True
                     # Configure network settings using SLAAC from RAs
-                    iface_cfg['IPV6_AUTOCONF'] = True
-            elif subnet_type in ['dhcp4', 'dhcp']:
-                bootproto_in = iface_cfg['BOOTPROTO']
-                iface_cfg['BOOTPROTO'] = 'dhcp'
-                if flavor == 'suse' and subnet_type == 'dhcp4':
+                    iface_cfg["IPV6_AUTOCONF"] = True
+            elif subnet_type in ["dhcp4", "dhcp"]:
+                bootproto_in = iface_cfg["BOOTPROTO"]
+                iface_cfg["BOOTPROTO"] = "dhcp"
+                if flavor == "suse" and subnet_type == "dhcp4":
                     # If dhcp6 is already specified the user wants dhcp
                     # for both protocols
-                    if bootproto_in != 'dhcp6':
+                    if bootproto_in != "dhcp6":
                         # Only IPv4 is DHCP, IPv6 may be static
-                        iface_cfg['BOOTPROTO'] = 'dhcp4'
-            elif subnet_type in ['static', 'static6']:
+                        iface_cfg["BOOTPROTO"] = "dhcp4"
+            elif subnet_type in ["static", "static6"]:
                 # RH info
                 # grep BOOTPROTO sysconfig.txt -A2 | head -3
                 # BOOTPROTO=none|bootp|dhcp
@@ -458,169 +521,184 @@ class Renderer(renderer.Renderer):
                 # to run on the device. Any other
                 # value causes any static configuration
                 # in the file to be applied.
-                if subnet_is_ipv6(subnet) and flavor != 'suse':
-                    mtu_key = 'IPV6_MTU'
-                    iface_cfg['IPV6INIT'] = True
-                if 'mtu' in subnet:
-                    mtu_mismatch = bool(mtu_key in iface_cfg and
-                                        subnet['mtu'] != iface_cfg[mtu_key])
+                if subnet_is_ipv6(subnet) and flavor != "suse":
+                    mtu_key = "IPV6_MTU"
+                    iface_cfg["IPV6INIT"] = True
+                if "mtu" in subnet:
+                    mtu_mismatch = bool(
+                        mtu_key in iface_cfg
+                        and subnet["mtu"] != iface_cfg[mtu_key]
+                    )
                     if mtu_mismatch:
                         LOG.warning(
-                            'Network config: ignoring %s device-level mtu:%s'
-                            ' because ipv4 subnet-level mtu:%s provided.',
-                            iface_cfg.name, iface_cfg[mtu_key], subnet['mtu'])
+                            "Network config: ignoring %s device-level mtu:%s"
+                            " because ipv4 subnet-level mtu:%s provided.",
+                            iface_cfg.name,
+                            iface_cfg[mtu_key],
+                            subnet["mtu"],
+                        )
                     if subnet_is_ipv6(subnet):
-                        if flavor == 'suse':
+                        if flavor == "suse":
                             # TODO(rjschwei) write mtu setting to
                             # /etc/sysctl.d/
                             pass
                         else:
-                            iface_cfg[mtu_key] = subnet['mtu']
+                            iface_cfg[mtu_key] = subnet["mtu"]
                     else:
-                        iface_cfg[mtu_key] = subnet['mtu']
+                        iface_cfg[mtu_key] = subnet["mtu"]
 
-                if subnet_is_ipv6(subnet) and flavor == 'rhel':
-                    iface_cfg['IPV6_FORCE_ACCEPT_RA'] = False
-                    iface_cfg['IPV6_AUTOCONF'] = False
-            elif subnet_type == 'manual':
-                if flavor == 'suse':
+                if subnet_is_ipv6(subnet) and flavor == "rhel":
+                    iface_cfg["IPV6_FORCE_ACCEPT_RA"] = False
+                    iface_cfg["IPV6_AUTOCONF"] = False
+            elif subnet_type == "manual":
+                if flavor == "suse":
                     LOG.debug('Unknown subnet type setting "%s"', subnet_type)
                 else:
                     # If the subnet has an MTU setting, then ONBOOT=True
                     # to apply the setting
-                    iface_cfg['ONBOOT'] = mtu_key in iface_cfg
+                    iface_cfg["ONBOOT"] = mtu_key in iface_cfg
             else:
-                raise ValueError("Unknown subnet type '%s' found"
-                                 " for interface '%s'" % (subnet_type,
-                                                          iface_cfg.name))
-            if subnet.get('control') == 'manual':
-                if flavor == 'suse':
-                    iface_cfg['STARTMODE'] = 'manual'
+                raise ValueError(
+                    "Unknown subnet type '%s' found for interface '%s'"
+                    % (subnet_type, iface_cfg.name)
+                )
+            if subnet.get("control") == "manual":
+                if flavor == "suse":
+                    iface_cfg["STARTMODE"] = "manual"
                 else:
-                    iface_cfg['ONBOOT'] = False
+                    iface_cfg["ONBOOT"] = False
 
         # set IPv4 and IPv6 static addresses
         ipv4_index = -1
         ipv6_index = -1
         for i, subnet in enumerate(subnets, start=len(iface_cfg.children)):
-            subnet_type = subnet.get('type')
+            subnet_type = subnet.get("type")
             # metric may apply to both dhcp and static config
-            if 'metric' in subnet:
-                if flavor != 'suse':
-                    iface_cfg['METRIC'] = subnet['metric']
-            if subnet_type in ['dhcp', 'dhcp4']:
+            if "metric" in subnet:
+                if flavor != "suse":
+                    iface_cfg["METRIC"] = subnet["metric"]
+            if subnet_type in ["dhcp", "dhcp4"]:
                 # On SUSE distros 'DHCLIENT_SET_DEFAULT_ROUTE' is a global
                 # setting in /etc/sysconfig/network/dhcp
-                if flavor != 'suse':
-                    if has_default_route and iface_cfg['BOOTPROTO'] != 'none':
-                        iface_cfg['DHCLIENT_SET_DEFAULT_ROUTE'] = False
+                if flavor != "suse":
+                    if has_default_route and iface_cfg["BOOTPROTO"] != "none":
+                        iface_cfg["DHCLIENT_SET_DEFAULT_ROUTE"] = False
                 continue
             elif subnet_type in IPV6_DYNAMIC_TYPES:
                 continue
-            elif subnet_type in ['static', 'static6']:
+            elif subnet_type in ["static", "static6"]:
                 if subnet_is_ipv6(subnet):
                     ipv6_index = ipv6_index + 1
-                    ipv6_cidr = "%s/%s" % (subnet['address'], subnet['prefix'])
+                    ipv6_cidr = "%s/%s" % (subnet["address"], subnet["prefix"])
                     if ipv6_index == 0:
-                        if flavor == 'suse':
-                            iface_cfg['IPADDR6'] = ipv6_cidr
+                        if flavor == "suse":
+                            iface_cfg["IPADDR6"] = ipv6_cidr
                         else:
-                            iface_cfg['IPV6ADDR'] = ipv6_cidr
+                            iface_cfg["IPV6ADDR"] = ipv6_cidr
                     elif ipv6_index == 1:
-                        if flavor == 'suse':
-                            iface_cfg['IPADDR6_1'] = ipv6_cidr
+                        if flavor == "suse":
+                            iface_cfg["IPADDR6_1"] = ipv6_cidr
                         else:
-                            iface_cfg['IPV6ADDR_SECONDARIES'] = ipv6_cidr
+                            iface_cfg["IPV6ADDR_SECONDARIES"] = ipv6_cidr
                     else:
-                        if flavor == 'suse':
-                            iface_cfg['IPADDR6_%d' % ipv6_index] = ipv6_cidr
+                        if flavor == "suse":
+                            iface_cfg["IPADDR6_%d" % ipv6_index] = ipv6_cidr
                         else:
-                            iface_cfg['IPV6ADDR_SECONDARIES'] += \
+                            iface_cfg["IPV6ADDR_SECONDARIES"] += (
                                 " " + ipv6_cidr
+                            )
                 else:
                     ipv4_index = ipv4_index + 1
                     suff = "" if ipv4_index == 0 else str(ipv4_index)
-                    iface_cfg['IPADDR' + suff] = subnet['address']
-                    iface_cfg['NETMASK' + suff] = \
-                        net_prefix_to_ipv4_mask(subnet['prefix'])
-
-                if 'gateway' in subnet and flavor != 'suse':
-                    iface_cfg['DEFROUTE'] = True
-                    if is_ipv6_addr(subnet['gateway']):
-                        iface_cfg['IPV6_DEFAULTGW'] = subnet['gateway']
+                    iface_cfg["IPADDR" + suff] = subnet["address"]
+                    iface_cfg["NETMASK" + suff] = net_prefix_to_ipv4_mask(
+                        subnet["prefix"]
+                    )
+
+                if "gateway" in subnet and flavor != "suse":
+                    iface_cfg["DEFROUTE"] = True
+                    if is_ipv6_addr(subnet["gateway"]):
+                        iface_cfg["IPV6_DEFAULTGW"] = subnet["gateway"]
                     else:
-                        iface_cfg['GATEWAY'] = subnet['gateway']
+                        iface_cfg["GATEWAY"] = subnet["gateway"]
 
-                if 'dns_search' in subnet and flavor != 'suse':
-                    iface_cfg['DOMAIN'] = ' '.join(subnet['dns_search'])
+                if "dns_search" in subnet and flavor != "suse":
+                    iface_cfg["DOMAIN"] = " ".join(subnet["dns_search"])
 
-                if 'dns_nameservers' in subnet and flavor != 'suse':
-                    if len(subnet['dns_nameservers']) > 3:
+                if "dns_nameservers" in subnet and flavor != "suse":
+                    if len(subnet["dns_nameservers"]) > 3:
                         # per resolv.conf(5) MAXNS sets this to 3.
-                        LOG.debug("%s has %d entries in dns_nameservers. "
-                                  "Only 3 are used.", iface_cfg.name,
-                                  len(subnet['dns_nameservers']))
-                    for i, k in enumerate(subnet['dns_nameservers'][:3], 1):
-                        iface_cfg['DNS' + str(i)] = k
+                        LOG.debug(
+                            "%s has %d entries in dns_nameservers. "
+                            "Only 3 are used.",
+                            iface_cfg.name,
+                            len(subnet["dns_nameservers"]),
+                        )
+                    for i, k in enumerate(subnet["dns_nameservers"][:3], 1):
+                        iface_cfg["DNS" + str(i)] = k
 
     @classmethod
     def _render_subnet_routes(cls, iface_cfg, route_cfg, subnets, flavor):
         # TODO(rjschwei): route configuration on SUSE distro happens via
         # ifroute-* files, see lp#1812117. SUSE currently carries a local
         # patch in their package.
-        if flavor == 'suse':
+        if flavor == "suse":
             return
         for _, subnet in enumerate(subnets, start=len(iface_cfg.children)):
-            subnet_type = subnet.get('type')
-            for route in subnet.get('routes', []):
-                is_ipv6 = subnet.get('ipv6') or is_ipv6_addr(route['gateway'])
+            subnet_type = subnet.get("type")
+            for route in subnet.get("routes", []):
+                is_ipv6 = subnet.get("ipv6") or is_ipv6_addr(route["gateway"])
 
                 # Any dynamic configuration method, slaac, dhcpv6-stateful/
                 # stateless should get router information from router RA's.
-                if (_is_default_route(route) and subnet_type not in
-                        IPV6_DYNAMIC_TYPES):
+                if (
+                    _is_default_route(route)
+                    and subnet_type not in IPV6_DYNAMIC_TYPES
+                ):
                     if (
-                            (subnet.get('ipv4') and
-                             route_cfg.has_set_default_ipv4) or
-                            (subnet.get('ipv6') and
-                             route_cfg.has_set_default_ipv6)
+                        subnet.get("ipv4") and route_cfg.has_set_default_ipv4
+                    ) or (
+                        subnet.get("ipv6") and route_cfg.has_set_default_ipv6
                     ):
-                        raise ValueError("Duplicate declaration of default "
-                                         "route found for interface '%s'"
-                                         % (iface_cfg.name))
+                        raise ValueError(
+                            "Duplicate declaration of default "
+                            "route found for interface '%s'" % (iface_cfg.name)
+                        )
                     # NOTE(harlowja): ipv6 and ipv4 default gateways
-                    gw_key = 'GATEWAY0'
-                    nm_key = 'NETMASK0'
-                    addr_key = 'ADDRESS0'
+                    gw_key = "GATEWAY0"
+                    nm_key = "NETMASK0"
+                    addr_key = "ADDRESS0"
                     # The owning interface provides the default route.
                     #
                     # TODO(harlowja): add validation that no other iface has
                     # also provided the default route?
-                    iface_cfg['DEFROUTE'] = True
-                    if iface_cfg['BOOTPROTO'] in ('dhcp', 'dhcp4'):
-                        iface_cfg['DHCLIENT_SET_DEFAULT_ROUTE'] = True
-                    if 'gateway' in route:
+                    iface_cfg["DEFROUTE"] = True
+                    if iface_cfg["BOOTPROTO"] in ("dhcp", "dhcp4"):
+                        iface_cfg["DHCLIENT_SET_DEFAULT_ROUTE"] = True
+                    if "gateway" in route:
                         if is_ipv6:
-                            iface_cfg['IPV6_DEFAULTGW'] = route['gateway']
+                            iface_cfg["IPV6_DEFAULTGW"] = route["gateway"]
                             route_cfg.has_set_default_ipv6 = True
                         else:
-                            iface_cfg['GATEWAY'] = route['gateway']
+                            iface_cfg["GATEWAY"] = route["gateway"]
                             route_cfg.has_set_default_ipv4 = True
-                    if 'metric' in route:
-                        iface_cfg['METRIC'] = route['metric']
+                    if "metric" in route:
+                        iface_cfg["METRIC"] = route["metric"]
 
                 else:
-                    gw_key = 'GATEWAY%s' % route_cfg.last_idx
-                    nm_key = 'NETMASK%s' % route_cfg.last_idx
-                    addr_key = 'ADDRESS%s' % route_cfg.last_idx
-                    metric_key = 'METRIC%s' % route_cfg.last_idx
+                    gw_key = "GATEWAY%s" % route_cfg.last_idx
+                    nm_key = "NETMASK%s" % route_cfg.last_idx
+                    addr_key = "ADDRESS%s" % route_cfg.last_idx
+                    metric_key = "METRIC%s" % route_cfg.last_idx
                     route_cfg.last_idx += 1
                     # add default routes only to ifcfg files, not
                     # to route-* or route6-*
-                    for (old_key, new_key) in [('gateway', gw_key),
-                                               ('metric', metric_key),
-                                               ('netmask', nm_key),
-                                               ('network', addr_key)]:
+                    for (old_key, new_key) in [
+                        ("gateway", gw_key),
+                        ("metric", metric_key),
+                        ("netmask", nm_key),
+                        ("network", addr_key),
+                    ]:
                         if old_key in route:
                             route_cfg[new_key] = route[old_key]
 
@@ -638,33 +716,35 @@ class Renderer(renderer.Renderer):
                     bond_opts.append(value_tpl % (bond_value))
                     break
         if bond_opts:
-            if flavor == 'suse':
+            if flavor == "suse":
                 # suse uses the sysconfig support which requires
                 # BONDING_MODULE_OPTS see
                 # https://www.kernel.org/doc/Documentation/networking/bonding.txt
                 # 3.1 Configuration with Sysconfig Support
-                iface_cfg['BONDING_MODULE_OPTS'] = " ".join(bond_opts)
+                iface_cfg["BONDING_MODULE_OPTS"] = " ".join(bond_opts)
             else:
                 # rhel uses initscript support and thus requires BONDING_OPTS
                 # this is also the old default see
                 # https://www.kernel.org/doc/Documentation/networking/bonding.txt
                 #  3.2 Configuration with Initscripts Support
-                iface_cfg['BONDING_OPTS'] = " ".join(bond_opts)
+                iface_cfg["BONDING_OPTS"] = " ".join(bond_opts)
 
     @classmethod
     def _render_physical_interfaces(
-            cls, network_state, iface_contents, flavor
+        cls, network_state, iface_contents, flavor
     ):
         physical_filter = renderer.filter_by_physical
         for iface in network_state.iter_interfaces(physical_filter):
-            iface_name = iface['name']
+            iface_name = iface["name"]
             iface_subnets = iface.get("subnets", [])
             iface_cfg = iface_contents[iface_name]
             route_cfg = iface_cfg.routes
 
             cls._render_subnets(
-                iface_cfg, iface_subnets, network_state.has_default_route,
-                flavor
+                iface_cfg,
+                iface_subnets,
+                network_state.has_default_route,
+                flavor,
             )
             cls._render_subnet_routes(
                 iface_cfg, route_cfg, iface_subnets, flavor
@@ -672,10 +752,10 @@ class Renderer(renderer.Renderer):
 
     @classmethod
     def _render_bond_interfaces(cls, network_state, iface_contents, flavor):
-        bond_filter = renderer.filter_by_type('bond')
-        slave_filter = renderer.filter_by_attr('bond-master')
+        bond_filter = renderer.filter_by_type("bond")
+        slave_filter = renderer.filter_by_attr("bond-master")
         for iface in network_state.iter_interfaces(bond_filter):
-            iface_name = iface['name']
+            iface_name = iface["name"]
             iface_cfg = iface_contents[iface_name]
             cls._render_bonding_opts(iface_cfg, iface, flavor)
 
@@ -684,21 +764,23 @@ class Renderer(renderer.Renderer):
             master_cfgs = [iface_cfg]
             master_cfgs.extend(iface_cfg.children)
             for master_cfg in master_cfgs:
-                master_cfg['BONDING_MASTER'] = True
-                if flavor != 'suse':
-                    master_cfg.kind = 'bond'
+                master_cfg["BONDING_MASTER"] = True
+                if flavor != "suse":
+                    master_cfg.kind = "bond"
 
-            if iface.get('mac_address'):
-                if flavor == 'suse':
-                    iface_cfg['LLADDR'] = iface.get('mac_address')
+            if iface.get("mac_address"):
+                if flavor == "suse":
+                    iface_cfg["LLADDR"] = iface.get("mac_address")
                 else:
-                    iface_cfg['MACADDR'] = iface.get('mac_address')
+                    iface_cfg["MACADDR"] = iface.get("mac_address")
 
             iface_subnets = iface.get("subnets", [])
             route_cfg = iface_cfg.routes
             cls._render_subnets(
-                iface_cfg, iface_subnets, network_state.has_default_route,
-                flavor
+                iface_cfg,
+                iface_subnets,
+                network_state.has_default_route,
+                flavor,
             )
             cls._render_subnet_routes(
                 iface_cfg, route_cfg, iface_subnets, flavor
@@ -707,54 +789,64 @@ class Renderer(renderer.Renderer):
             # iter_interfaces on network-state is not sorted to produce
             # consistent numbers we need to sort.
             bond_slaves = sorted(
-                [slave_iface['name'] for slave_iface in
-                 network_state.iter_interfaces(slave_filter)
-                 if slave_iface['bond-master'] == iface_name])
+                [
+                    slave_iface["name"]
+                    for slave_iface in network_state.iter_interfaces(
+                        slave_filter
+                    )
+                    if slave_iface["bond-master"] == iface_name
+                ]
+            )
 
             for index, bond_slave in enumerate(bond_slaves):
-                if flavor == 'suse':
-                    slavestr = 'BONDING_SLAVE_%s' % index
+                if flavor == "suse":
+                    slavestr = "BONDING_SLAVE_%s" % index
                 else:
-                    slavestr = 'BONDING_SLAVE%s' % index
+                    slavestr = "BONDING_SLAVE%s" % index
                 iface_cfg[slavestr] = bond_slave
 
                 slave_cfg = iface_contents[bond_slave]
-                if flavor == 'suse':
-                    slave_cfg['BOOTPROTO'] = 'none'
-                    slave_cfg['STARTMODE'] = 'hotplug'
+                if flavor == "suse":
+                    slave_cfg["BOOTPROTO"] = "none"
+                    slave_cfg["STARTMODE"] = "hotplug"
                 else:
-                    slave_cfg['MASTER'] = iface_name
-                    slave_cfg['SLAVE'] = True
+                    slave_cfg["MASTER"] = iface_name
+                    slave_cfg["SLAVE"] = True
 
     @classmethod
     def _render_vlan_interfaces(cls, network_state, iface_contents, flavor):
-        vlan_filter = renderer.filter_by_type('vlan')
+        vlan_filter = renderer.filter_by_type("vlan")
         for iface in network_state.iter_interfaces(vlan_filter):
-            iface_name = iface['name']
+            iface_name = iface["name"]
             iface_cfg = iface_contents[iface_name]
-            if flavor == 'suse':
-                vlan_id = iface.get('vlan_id')
+            if flavor == "suse":
+                vlan_id = iface.get("vlan_id")
                 if vlan_id:
-                    iface_cfg['VLAN_ID'] = vlan_id
-                iface_cfg['ETHERDEVICE'] = iface_name[:iface_name.rfind('.')]
+                    iface_cfg["VLAN_ID"] = vlan_id
+                iface_cfg["ETHERDEVICE"] = iface_name[: iface_name.rfind(".")]
             else:
-                iface_cfg['VLAN'] = True
-                iface_cfg.kind = 'vlan'
+                iface_cfg["VLAN"] = True
+                iface_cfg.kind = "vlan"
 
-                rdev = iface['vlan-raw-device']
-                supported = _supported_vlan_names(rdev, iface['vlan_id'])
+                rdev = iface["vlan-raw-device"]
+                supported = _supported_vlan_names(rdev, iface["vlan_id"])
                 if iface_name not in supported:
                     LOG.info(
                         "Name '%s' for vlan '%s' is not officially supported"
                         "by RHEL. Supported: %s",
-                        iface_name, rdev, ' '.join(supported))
-                iface_cfg['PHYSDEV'] = rdev
+                        iface_name,
+                        rdev,
+                        " ".join(supported),
+                    )
+                iface_cfg["PHYSDEV"] = rdev
 
             iface_subnets = iface.get("subnets", [])
             route_cfg = iface_cfg.routes
             cls._render_subnets(
-                iface_cfg, iface_subnets, network_state.has_default_route,
-                flavor
+                iface_cfg,
+                iface_subnets,
+                network_state.has_default_route,
+                flavor,
             )
             cls._render_subnet_routes(
                 iface_cfg, route_cfg, iface_subnets, flavor
@@ -763,8 +855,12 @@ class Renderer(renderer.Renderer):
     @staticmethod
     def _render_dns(network_state, existing_dns_path=None):
         # skip writing resolv.conf if network_state doesn't include any input.
-        if not any([len(network_state.dns_nameservers),
-                    len(network_state.dns_searchdomains)]):
+        if not any(
+            [
+                len(network_state.dns_nameservers),
+                len(network_state.dns_searchdomains),
+            ]
+        ):
             return None
         content = resolv_conf.ResolvConf("")
         if existing_dns_path and os.path.isfile(existing_dns_path):
@@ -773,10 +869,10 @@ class Renderer(renderer.Renderer):
             content.add_nameserver(nameserver)
         for searchdomain in network_state.dns_searchdomains:
             content.add_search_domain(searchdomain)
-        header = _make_header(';')
+        header = _make_header(";")
         content_str = str(content)
         if not content_str.startswith(header):
-            content_str = header + '\n' + content_str
+            content_str = header + "\n" + content_str
         return content_str
 
     @staticmethod
@@ -787,7 +883,7 @@ class Renderer(renderer.Renderer):
         # NetworkManager to not manage dns, so that /etc/resolv.conf
         # does not get clobbered.
         if network_state.dns_nameservers:
-            content.set_section_keypair('main', 'dns', 'none')
+            content.set_section_keypair("main", "dns", "none")
 
         if len(content) == 0:
             return None
@@ -797,39 +893,41 @@ class Renderer(renderer.Renderer):
     @classmethod
     def _render_bridge_interfaces(cls, network_state, iface_contents, flavor):
         bridge_key_map = {
-            old_k: new_k for old_k, new_k in cls.cfg_key_maps[flavor].items()
-            if old_k.startswith('bridge')}
-        bridge_filter = renderer.filter_by_type('bridge')
+            old_k: new_k
+            for old_k, new_k in cls.cfg_key_maps[flavor].items()
+            if old_k.startswith("bridge")
+        }
+        bridge_filter = renderer.filter_by_type("bridge")
 
         for iface in network_state.iter_interfaces(bridge_filter):
-            iface_name = iface['name']
+            iface_name = iface["name"]
             iface_cfg = iface_contents[iface_name]
-            if flavor != 'suse':
-                iface_cfg.kind = 'bridge'
+            if flavor != "suse":
+                iface_cfg.kind = "bridge"
             for old_key, new_key in bridge_key_map.items():
                 if old_key in iface:
                     iface_cfg[new_key] = iface[old_key]
 
-            if flavor == 'suse':
-                if 'BRIDGE_STP' in iface_cfg:
-                    if iface_cfg.get('BRIDGE_STP'):
-                        iface_cfg['BRIDGE_STP'] = 'on'
+            if flavor == "suse":
+                if "BRIDGE_STP" in iface_cfg:
+                    if iface_cfg.get("BRIDGE_STP"):
+                        iface_cfg["BRIDGE_STP"] = "on"
                     else:
-                        iface_cfg['BRIDGE_STP'] = 'off'
-
-            if iface.get('mac_address'):
-                key = 'MACADDR'
-                if flavor == 'suse':
-                    key = 'LLADDRESS'
-                iface_cfg[key] = iface.get('mac_address')
-
-            if flavor == 'suse':
-                if iface.get('bridge_ports', []):
-                    iface_cfg['BRIDGE_PORTS'] = '%s' % " ".join(
-                        iface.get('bridge_ports')
+                        iface_cfg["BRIDGE_STP"] = "off"
+
+            if iface.get("mac_address"):
+                key = "MACADDR"
+                if flavor == "suse":
+                    key = "LLADDRESS"
+                iface_cfg[key] = iface.get("mac_address")
+
+            if flavor == "suse":
+                if iface.get("bridge_ports", []):
+                    iface_cfg["BRIDGE_PORTS"] = "%s" % " ".join(
+                        iface.get("bridge_ports")
                     )
             # Is this the right key to get all the connected interfaces?
-            for bridged_iface_name in iface.get('bridge_ports', []):
+            for bridged_iface_name in iface.get("bridge_ports", []):
                 # Ensure all bridged interfaces are correctly tagged
                 # as being bridged to this interface.
                 bridged_cfg = iface_contents[bridged_iface_name]
@@ -837,15 +935,17 @@ class Renderer(renderer.Renderer):
                 bridged_cfgs.extend(bridged_cfg.children)
                 for bridge_cfg in bridged_cfgs:
                     bridge_value = iface_name
-                    if flavor == 'suse':
-                        bridge_value = 'yes'
-                    bridge_cfg['BRIDGE'] = bridge_value
+                    if flavor == "suse":
+                        bridge_value = "yes"
+                    bridge_cfg["BRIDGE"] = bridge_value
 
             iface_subnets = iface.get("subnets", [])
             route_cfg = iface_cfg.routes
             cls._render_subnets(
-                iface_cfg, iface_subnets, network_state.has_default_route,
-                flavor
+                iface_cfg,
+                iface_subnets,
+                network_state.has_default_route,
+                flavor,
             )
             cls._render_subnet_routes(
                 iface_cfg, route_cfg, iface_subnets, flavor
@@ -853,37 +953,40 @@ class Renderer(renderer.Renderer):
 
     @classmethod
     def _render_ib_interfaces(cls, network_state, iface_contents, flavor):
-        ib_filter = renderer.filter_by_type('infiniband')
+        ib_filter = renderer.filter_by_type("infiniband")
         for iface in network_state.iter_interfaces(ib_filter):
-            iface_name = iface['name']
+            iface_name = iface["name"]
             iface_cfg = iface_contents[iface_name]
-            iface_cfg.kind = 'infiniband'
+            iface_cfg.kind = "infiniband"
             iface_subnets = iface.get("subnets", [])
             route_cfg = iface_cfg.routes
             cls._render_subnets(
-                iface_cfg, iface_subnets, network_state.has_default_route,
-                flavor
+                iface_cfg,
+                iface_subnets,
+                network_state.has_default_route,
+                flavor,
             )
             cls._render_subnet_routes(
                 iface_cfg, route_cfg, iface_subnets, flavor
             )
 
     @classmethod
-    def _render_sysconfig(cls, base_sysconf_dir, network_state, flavor,
-                          templates=None):
-        '''Given state, return /etc/sysconfig files + contents'''
+    def _render_sysconfig(
+        cls, base_sysconf_dir, network_state, flavor, templates=None
+    ):
+        """Given state, return /etc/sysconfig files + contents"""
         if not templates:
             templates = cls.templates
         iface_contents = {}
         for iface in network_state.iter_interfaces():
-            if iface['type'] == "loopback":
+            if iface["type"] == "loopback":
                 continue
-            iface_name = iface['name']
+            iface_name = iface["name"]
             iface_cfg = NetInterface(iface_name, base_sysconf_dir, templates)
-            if flavor == 'suse':
-                iface_cfg.drop('DEVICE')
+            if flavor == "suse":
+                iface_cfg.drop("DEVICE")
                 # If type detection fails it is considered a bug in SUSE
-                iface_cfg.drop('TYPE')
+                iface_cfg.drop("TYPE")
             cls._render_iface_shared(iface, iface_cfg, flavor)
             iface_contents[iface_name] = iface_cfg
         cls._render_physical_interfaces(network_state, iface_contents, flavor)
@@ -899,9 +1002,10 @@ class Renderer(renderer.Renderer):
                     if iface_cfg:
                         contents[iface_cfg.path] = iface_cfg.to_string()
             if iface_cfg.routes:
-                for cpath, proto in zip([iface_cfg.routes.path_ipv4,
-                                         iface_cfg.routes.path_ipv6],
-                                        ["ipv4", "ipv6"]):
+                for cpath, proto in zip(
+                    [iface_cfg.routes.path_ipv4, iface_cfg.routes.path_ipv6],
+                    ["ipv4", "ipv6"],
+                ):
                     if cpath not in contents:
                         contents[cpath] = iface_cfg.routes.to_string(proto)
         return contents
@@ -911,21 +1015,24 @@ class Renderer(renderer.Renderer):
             templates = self.templates
         file_mode = 0o644
         base_sysconf_dir = subp.target_path(target, self.sysconf_dir)
-        for path, data in self._render_sysconfig(base_sysconf_dir,
-                                                 network_state, self.flavor,
-                                                 templates=templates).items():
+        for path, data in self._render_sysconfig(
+            base_sysconf_dir, network_state, self.flavor, templates=templates
+        ).items():
             util.write_file(path, data, file_mode)
         if self.dns_path:
             dns_path = subp.target_path(target, self.dns_path)
-            resolv_content = self._render_dns(network_state,
-                                              existing_dns_path=dns_path)
+            resolv_content = self._render_dns(
+                network_state, existing_dns_path=dns_path
+            )
             if resolv_content:
                 util.write_file(dns_path, resolv_content, file_mode)
         if self.networkmanager_conf_path:
-            nm_conf_path = subp.target_path(target,
-                                            self.networkmanager_conf_path)
-            nm_conf_content = self._render_networkmanager_conf(network_state,
-                                                               templates)
+            nm_conf_path = subp.target_path(
+                target, self.networkmanager_conf_path
+            )
+            nm_conf_content = self._render_networkmanager_conf(
+                network_state, templates
+            )
             if nm_conf_content:
                 util.write_file(nm_conf_path, nm_conf_content, file_mode)
         if self.netrules_path:
@@ -933,20 +1040,19 @@ class Renderer(renderer.Renderer):
             netrules_path = subp.target_path(target, self.netrules_path)
             util.write_file(netrules_path, netrules_content, file_mode)
         if available_nm(target=target):
-            enable_ifcfg_rh(subp.target_path(
-                target, path=NM_CFG_FILE
-            ))
+            enable_ifcfg_rh(subp.target_path(target, path=NM_CFG_FILE))
 
-        sysconfig_path = subp.target_path(target, templates.get('control'))
+        sysconfig_path = subp.target_path(target, templates.get("control"))
         # Distros configuring /etc/sysconfig/network as a file e.g. Centos
-        if sysconfig_path.endswith('network'):
+        if sysconfig_path.endswith("network"):
             util.ensure_dir(os.path.dirname(sysconfig_path))
-            netcfg = [_make_header(), 'NETWORKING=yes']
+            netcfg = [_make_header(), "NETWORKING=yes"]
             if network_state.use_ipv6:
-                netcfg.append('NETWORKING_IPV6=yes')
-                netcfg.append('IPV6_AUTOCONF=no')
-            util.write_file(sysconfig_path,
-                            "\n".join(netcfg) + "\n", file_mode)
+                netcfg.append("NETWORKING_IPV6=yes")
+                netcfg.append("IPV6_AUTOCONF=no")
+            util.write_file(
+                sysconfig_path, "\n".join(netcfg) + "\n", file_mode
+            )
 
 
 def _supported_vlan_names(rdev, vid):
@@ -954,27 +1060,34 @@ def _supported_vlan_names(rdev, vid):
     11.5. Naming Scheme for VLAN Interfaces."""
     return [
         v.format(rdev=rdev, vid=int(vid))
-        for v in ("{rdev}{vid:04}", "{rdev}{vid}",
-                  "{rdev}.{vid:04}", "{rdev}.{vid}")]
+        for v in (
+            "{rdev}{vid:04}",
+            "{rdev}{vid}",
+            "{rdev}.{vid:04}",
+            "{rdev}.{vid}",
+        )
+    ]
 
 
 def available(target=None):
     sysconfig = available_sysconfig(target=target)
     nm = available_nm(target=target)
-    return (util.system_info()['variant'] in KNOWN_DISTROS
-            and any([nm, sysconfig]))
+    return util.system_info()["variant"] in KNOWN_DISTROS and any(
+        [nm, sysconfig]
+    )
 
 
 def available_sysconfig(target=None):
-    expected = ['ifup', 'ifdown']
-    search = ['/sbin', '/usr/sbin']
+    expected = ["ifup", "ifdown"]
+    search = ["/sbin", "/usr/sbin"]
     for p in expected:
         if not subp.which(p, search=search, target=target):
             return False
 
     expected_paths = [
-        'etc/sysconfig/network-scripts/network-functions',
-        'etc/sysconfig/config']
+        "etc/sysconfig/network-scripts/network-functions",
+        "etc/sysconfig/config",
+    ]
     for p in expected_paths:
         if os.path.isfile(subp.target_path(target, p)):
             return True
@@ -982,10 +1095,7 @@ def available_sysconfig(target=None):
 
 
 def available_nm(target=None):
-    if not os.path.isfile(subp.target_path(
-        target,
-        path=NM_CFG_FILE
-    )):
+    if not os.path.isfile(subp.target_path(target, path=NM_CFG_FILE)):
         return False
     return True
 
diff --git a/cloudinit/net/udev.py b/cloudinit/net/udev.py
index 58c0a708..b79e4426 100644
--- a/cloudinit/net/udev.py
+++ b/cloudinit/net/udev.py
@@ -32,15 +32,18 @@ def generate_udev_rule(interface, mac, driver=None):
     ATTR{address}="ff:ee:dd:cc:bb:aa", NAME="eth0"
     """
     if not driver:
-        driver = '?*'
-
-    rule = ', '.join([
-        compose_udev_equality('SUBSYSTEM', 'net'),
-        compose_udev_equality('ACTION', 'add'),
-        compose_udev_equality('DRIVERS', driver),
-        compose_udev_attr_equality('address', mac),
-        compose_udev_setting('NAME', interface),
-    ])
-    return '%s\n' % rule
+        driver = "?*"
+
+    rule = ", ".join(
+        [
+            compose_udev_equality("SUBSYSTEM", "net"),
+            compose_udev_equality("ACTION", "add"),
+            compose_udev_equality("DRIVERS", driver),
+            compose_udev_attr_equality("address", mac),
+            compose_udev_setting("NAME", interface),
+        ]
+    )
+    return "%s\n" % rule
+
 
 # vi: ts=4 expandtab syntax=python
diff --git a/cloudinit/netinfo.py b/cloudinit/netinfo.py
index 628e2908..74e6b35a 100644
--- a/cloudinit/netinfo.py
+++ b/cloudinit/netinfo.py
@@ -8,25 +8,18 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from copy import copy, deepcopy
 import re
+from copy import copy, deepcopy
 
 from cloudinit import log as logging
+from cloudinit import subp, util
 from cloudinit.net.network_state import net_prefix_to_ipv4_mask
-from cloudinit import subp
-from cloudinit import util
-
 from cloudinit.simpletable import SimpleTable
 
 LOG = logging.getLogger()
 
 
-DEFAULT_NETDEV_INFO = {
-    "ipv4": [],
-    "ipv6": [],
-    "hwaddr": "",
-    "up": False
-}
+DEFAULT_NETDEV_INFO = {"ipv4": [], "ipv6": [], "hwaddr": "", "up": False}
 
 
 def _netdev_info_iproute(ipaddr_out):
@@ -42,51 +35,63 @@ def _netdev_info_iproute(ipaddr_out):
     devs = {}
     dev_name = None
     for num, line in enumerate(ipaddr_out.splitlines()):
-        m = re.match(r'^\d+:\s(?P<dev>[^:]+):\s+<(?P<flags>\S+)>\s+.*', line)
+        m = re.match(r"^\d+:\s(?P<dev>[^:]+):\s+<(?P<flags>\S+)>\s+.*", line)
         if m:
-            dev_name = m.group('dev').lower().split('@')[0]
-            flags = m.group('flags').split(',')
+            dev_name = m.group("dev").lower().split("@")[0]
+            flags = m.group("flags").split(",")
             devs[dev_name] = {
-                'ipv4': [], 'ipv6': [], 'hwaddr': '',
-                'up': bool('UP' in flags and 'LOWER_UP' in flags),
+                "ipv4": [],
+                "ipv6": [],
+                "hwaddr": "",
+                "up": bool("UP" in flags and "LOWER_UP" in flags),
             }
-        elif 'inet6' in line:
+        elif "inet6" in line:
             m = re.match(
-                r'\s+inet6\s(?P<ip>\S+)\sscope\s(?P<scope6>\S+).*', line)
+                r"\s+inet6\s(?P<ip>\S+)\sscope\s(?P<scope6>\S+).*", line
+            )
             if not m:
                 LOG.warning(
-                    'Could not parse ip addr show: (line:%d) %s', num, line)
+                    "Could not parse ip addr show: (line:%d) %s", num, line
+                )
                 continue
-            devs[dev_name]['ipv6'].append(m.groupdict())
-        elif 'inet' in line:
+            devs[dev_name]["ipv6"].append(m.groupdict())
+        elif "inet" in line:
             m = re.match(
-                r'\s+inet\s(?P<cidr4>\S+)(\sbrd\s(?P<bcast>\S+))?\sscope\s'
-                r'(?P<scope>\S+).*', line)
+                r"\s+inet\s(?P<cidr4>\S+)(\sbrd\s(?P<bcast>\S+))?\sscope\s"
+                r"(?P<scope>\S+).*",
+                line,
+            )
             if not m:
                 LOG.warning(
-                    'Could not parse ip addr show: (line:%d) %s', num, line)
+                    "Could not parse ip addr show: (line:%d) %s", num, line
+                )
                 continue
             match = m.groupdict()
-            cidr4 = match.pop('cidr4')
-            addr, _, prefix = cidr4.partition('/')
+            cidr4 = match.pop("cidr4")
+            addr, _, prefix = cidr4.partition("/")
             if not prefix:
-                prefix = '32'
-            devs[dev_name]['ipv4'].append({
-                'ip': addr,
-                'bcast': match['bcast'] if match['bcast'] else '',
-                'mask': net_prefix_to_ipv4_mask(prefix),
-                'scope': match['scope']})
-        elif 'link' in line:
+                prefix = "32"
+            devs[dev_name]["ipv4"].append(
+                {
+                    "ip": addr,
+                    "bcast": match["bcast"] if match["bcast"] else "",
+                    "mask": net_prefix_to_ipv4_mask(prefix),
+                    "scope": match["scope"],
+                }
+            )
+        elif "link" in line:
             m = re.match(
-                r'\s+link/(?P<link_type>\S+)\s(?P<hwaddr>\S+).*', line)
+                r"\s+link/(?P<link_type>\S+)\s(?P<hwaddr>\S+).*", line
+            )
             if not m:
                 LOG.warning(
-                    'Could not parse ip addr show: (line:%d) %s', num, line)
+                    "Could not parse ip addr show: (line:%d) %s", num, line
+                )
                 continue
-            if m.group('link_type') == 'ether':
-                devs[dev_name]['hwaddr'] = m.group('hwaddr')
+            if m.group("link_type") == "ether":
+                devs[dev_name]["hwaddr"] = m.group("hwaddr")
             else:
-                devs[dev_name]['hwaddr'] = ''
+                devs[dev_name]["hwaddr"] = ""
         else:
             continue
     return devs
@@ -101,40 +106,41 @@ def _netdev_info_ifconfig_netbsd(ifconfig_data):
         if line[0] not in ("\t", " "):
             curdev = line.split()[0]
             # current ifconfig pops a ':' on the end of the device
-            if curdev.endswith(':'):
+            if curdev.endswith(":"):
                 curdev = curdev[:-1]
             if curdev not in devs:
                 devs[curdev] = deepcopy(DEFAULT_NETDEV_INFO)
         toks = line.lower().strip().split()
         if len(toks) > 1:
             if re.search(r"flags=[x\d]+<up.*>", toks[1]):
-                devs[curdev]['up'] = True
+                devs[curdev]["up"] = True
 
         for i in range(len(toks)):
             if toks[i] == "inet":  # Create new ipv4 addr entry
-                network, net_bits = toks[i + 1].split('/')
-                devs[curdev]['ipv4'].append(
-                    {'ip': network, 'mask': net_prefix_to_ipv4_mask(net_bits)})
+                network, net_bits = toks[i + 1].split("/")
+                devs[curdev]["ipv4"].append(
+                    {"ip": network, "mask": net_prefix_to_ipv4_mask(net_bits)}
+                )
             elif toks[i] == "broadcast":
-                devs[curdev]['ipv4'][-1]['bcast'] = toks[i + 1]
+                devs[curdev]["ipv4"][-1]["bcast"] = toks[i + 1]
             elif toks[i] == "address:":
-                devs[curdev]['hwaddr'] = toks[i + 1]
+                devs[curdev]["hwaddr"] = toks[i + 1]
             elif toks[i] == "inet6":
                 if toks[i + 1] == "addr:":
-                    devs[curdev]['ipv6'].append({'ip': toks[i + 2]})
+                    devs[curdev]["ipv6"].append({"ip": toks[i + 2]})
                 else:
-                    devs[curdev]['ipv6'].append({'ip': toks[i + 1]})
+                    devs[curdev]["ipv6"].append({"ip": toks[i + 1]})
             elif toks[i] == "prefixlen":  # Add prefix to current ipv6 value
-                addr6 = devs[curdev]['ipv6'][-1]['ip'] + "/" + toks[i + 1]
-                devs[curdev]['ipv6'][-1]['ip'] = addr6
+                addr6 = devs[curdev]["ipv6"][-1]["ip"] + "/" + toks[i + 1]
+                devs[curdev]["ipv6"][-1]["ip"] = addr6
             elif toks[i].startswith("scope:"):
-                devs[curdev]['ipv6'][-1]['scope6'] = toks[i].lstrip("scope:")
+                devs[curdev]["ipv6"][-1]["scope6"] = toks[i].lstrip("scope:")
             elif toks[i] == "scopeid":
-                res = re.match(r'.*<(\S+)>', toks[i + 1])
+                res = re.match(r".*<(\S+)>", toks[i + 1])
                 if res:
-                    devs[curdev]['ipv6'][-1]['scope6'] = res.group(1)
+                    devs[curdev]["ipv6"][-1]["scope6"] = res.group(1)
                 else:
-                    devs[curdev]['ipv6'][-1]['scope6'] = toks[i + 1]
+                    devs[curdev]["ipv6"][-1]["scope6"] = toks[i + 1]
 
     return devs
 
@@ -148,49 +154,50 @@ def _netdev_info_ifconfig(ifconfig_data):
         if line[0] not in ("\t", " "):
             curdev = line.split()[0]
             # current ifconfig pops a ':' on the end of the device
-            if curdev.endswith(':'):
+            if curdev.endswith(":"):
                 curdev = curdev[:-1]
             if curdev not in devs:
                 devs[curdev] = deepcopy(DEFAULT_NETDEV_INFO)
         toks = line.lower().strip().split()
         if toks[0] == "up":
-            devs[curdev]['up'] = True
+            devs[curdev]["up"] = True
         # If the output of ifconfig doesn't contain the required info in the
         # obvious place, use a regex filter to be sure.
         elif len(toks) > 1:
             if re.search(r"flags=\d+<up,", toks[1]):
-                devs[curdev]['up'] = True
+                devs[curdev]["up"] = True
 
         for i in range(len(toks)):
             if toks[i] == "inet":  # Create new ipv4 addr entry
-                devs[curdev]['ipv4'].append(
-                    {'ip': toks[i + 1].lstrip("addr:")})
+                devs[curdev]["ipv4"].append(
+                    {"ip": toks[i + 1].lstrip("addr:")}
+                )
             elif toks[i].startswith("bcast:"):
-                devs[curdev]['ipv4'][-1]['bcast'] = toks[i].lstrip("bcast:")
+                devs[curdev]["ipv4"][-1]["bcast"] = toks[i].lstrip("bcast:")
             elif toks[i] == "broadcast":
-                devs[curdev]['ipv4'][-1]['bcast'] = toks[i + 1]
+                devs[curdev]["ipv4"][-1]["bcast"] = toks[i + 1]
             elif toks[i].startswith("mask:"):
-                devs[curdev]['ipv4'][-1]['mask'] = toks[i].lstrip("mask:")
+                devs[curdev]["ipv4"][-1]["mask"] = toks[i].lstrip("mask:")
             elif toks[i] == "netmask":
-                devs[curdev]['ipv4'][-1]['mask'] = toks[i + 1]
+                devs[curdev]["ipv4"][-1]["mask"] = toks[i + 1]
             elif toks[i] == "hwaddr" or toks[i] == "ether":
-                devs[curdev]['hwaddr'] = toks[i + 1]
+                devs[curdev]["hwaddr"] = toks[i + 1]
             elif toks[i] == "inet6":
                 if toks[i + 1] == "addr:":
-                    devs[curdev]['ipv6'].append({'ip': toks[i + 2]})
+                    devs[curdev]["ipv6"].append({"ip": toks[i + 2]})
                 else:
-                    devs[curdev]['ipv6'].append({'ip': toks[i + 1]})
+                    devs[curdev]["ipv6"].append({"ip": toks[i + 1]})
             elif toks[i] == "prefixlen":  # Add prefix to current ipv6 value
-                addr6 = devs[curdev]['ipv6'][-1]['ip'] + "/" + toks[i + 1]
-                devs[curdev]['ipv6'][-1]['ip'] = addr6
+                addr6 = devs[curdev]["ipv6"][-1]["ip"] + "/" + toks[i + 1]
+                devs[curdev]["ipv6"][-1]["ip"] = addr6
             elif toks[i].startswith("scope:"):
-                devs[curdev]['ipv6'][-1]['scope6'] = toks[i].lstrip("scope:")
+                devs[curdev]["ipv6"][-1]["scope6"] = toks[i].lstrip("scope:")
             elif toks[i] == "scopeid":
-                res = re.match(r'.*<(\S+)>', toks[i + 1])
+                res = re.match(r".*<(\S+)>", toks[i + 1])
                 if res:
-                    devs[curdev]['ipv6'][-1]['scope6'] = res.group(1)
+                    devs[curdev]["ipv6"][-1]["scope6"] = res.group(1)
                 else:
-                    devs[curdev]['ipv6'][-1]['scope6'] = toks[i + 1]
+                    devs[curdev]["ipv6"][-1]["scope6"] = toks[i + 1]
 
     return devs
 
@@ -200,17 +207,18 @@ def netdev_info(empty=""):
     if util.is_NetBSD():
         (ifcfg_out, _err) = subp.subp(["ifconfig", "-a"], rcs=[0, 1])
         devs = _netdev_info_ifconfig_netbsd(ifcfg_out)
-    elif subp.which('ip'):
+    elif subp.which("ip"):
         # Try iproute first of all
         (ipaddr_out, _err) = subp.subp(["ip", "addr", "show"])
         devs = _netdev_info_iproute(ipaddr_out)
-    elif subp.which('ifconfig'):
+    elif subp.which("ifconfig"):
         # Fall back to net-tools if iproute2 is not present
         (ifcfg_out, _err) = subp.subp(["ifconfig", "-a"], rcs=[0, 1])
         devs = _netdev_info_ifconfig(ifcfg_out)
     else:
         LOG.warning(
-            "Could not print networks: missing 'ip' and 'ifconfig' commands")
+            "Could not print networks: missing 'ip' and 'ifconfig' commands"
+        )
 
     if empty == "":
         return devs
@@ -219,7 +227,7 @@ def netdev_info(empty=""):
 
     def fill(data, new_val="", empty_vals=("", b"")):
         """Recursively replace 'empty_vals' in data (dict, tuple, list)
-           with new_val"""
+        with new_val"""
         if isinstance(data, dict):
             myiter = data.items()
         elif isinstance(data, (tuple, list)):
@@ -249,46 +257,52 @@ def _netdev_route_info_iproute(iproute_data):
     """
 
     routes = {}
-    routes['ipv4'] = []
-    routes['ipv6'] = []
+    routes["ipv4"] = []
+    routes["ipv6"] = []
     entries = iproute_data.splitlines()
     default_route_entry = {
-        'destination': '', 'flags': '', 'gateway': '', 'genmask': '',
-        'iface': '', 'metric': ''}
+        "destination": "",
+        "flags": "",
+        "gateway": "",
+        "genmask": "",
+        "iface": "",
+        "metric": "",
+    }
     for line in entries:
         entry = copy(default_route_entry)
         if not line:
             continue
         toks = line.split()
-        flags = ['U']
+        flags = ["U"]
         if toks[0] == "default":
-            entry['destination'] = "0.0.0.0"
-            entry['genmask'] = "0.0.0.0"
+            entry["destination"] = "0.0.0.0"
+            entry["genmask"] = "0.0.0.0"
         else:
-            if '/' in toks[0]:
+            if "/" in toks[0]:
                 (addr, cidr) = toks[0].split("/")
             else:
                 addr = toks[0]
-                cidr = '32'
+                cidr = "32"
                 flags.append("H")
-                entry['genmask'] = net_prefix_to_ipv4_mask(cidr)
-            entry['destination'] = addr
-            entry['genmask'] = net_prefix_to_ipv4_mask(cidr)
-            entry['gateway'] = "0.0.0.0"
+                entry["genmask"] = net_prefix_to_ipv4_mask(cidr)
+            entry["destination"] = addr
+            entry["genmask"] = net_prefix_to_ipv4_mask(cidr)
+            entry["gateway"] = "0.0.0.0"
         for i in range(len(toks)):
             if toks[i] == "via":
-                entry['gateway'] = toks[i + 1]
+                entry["gateway"] = toks[i + 1]
                 flags.insert(1, "G")
             if toks[i] == "dev":
                 entry["iface"] = toks[i + 1]
             if toks[i] == "metric":
-                entry['metric'] = toks[i + 1]
-        entry['flags'] = ''.join(flags)
-        routes['ipv4'].append(entry)
+                entry["metric"] = toks[i + 1]
+        entry["flags"] = "".join(flags)
+        routes["ipv4"].append(entry)
     try:
         (iproute_data6, _err6) = subp.subp(
             ["ip", "--oneline", "-6", "route", "list", "table", "all"],
-            rcs=[0, 1])
+            rcs=[0, 1],
+        )
     except subp.ProcessExecutionError:
         pass
     else:
@@ -299,30 +313,30 @@ def _netdev_route_info_iproute(iproute_data):
                 continue
             toks = line.split()
             if toks[0] == "default":
-                entry['destination'] = "::/0"
-                entry['flags'] = "UG"
+                entry["destination"] = "::/0"
+                entry["flags"] = "UG"
             else:
-                entry['destination'] = toks[0]
-                entry['gateway'] = "::"
-                entry['flags'] = "U"
+                entry["destination"] = toks[0]
+                entry["gateway"] = "::"
+                entry["flags"] = "U"
             for i in range(len(toks)):
                 if toks[i] == "via":
-                    entry['gateway'] = toks[i + 1]
-                    entry['flags'] = "UG"
+                    entry["gateway"] = toks[i + 1]
+                    entry["flags"] = "UG"
                 if toks[i] == "dev":
                     entry["iface"] = toks[i + 1]
                 if toks[i] == "metric":
-                    entry['metric'] = toks[i + 1]
+                    entry["metric"] = toks[i + 1]
                 if toks[i] == "expires":
-                    entry['flags'] = entry['flags'] + 'e'
-            routes['ipv6'].append(entry)
+                    entry["flags"] = entry["flags"] + "e"
+            routes["ipv6"].append(entry)
     return routes
 
 
 def _netdev_route_info_netstat(route_data):
     routes = {}
-    routes['ipv4'] = []
-    routes['ipv6'] = []
+    routes["ipv4"] = []
+    routes["ipv6"] = []
 
     entries = route_data.splitlines()
     for line in entries:
@@ -336,9 +350,14 @@ def _netdev_route_info_netstat(route_data):
         # Linux netstat shows 2 more:
         #  Destination  Gateway    Genmask  Flags Metric Ref    Use Iface
         #  0.0.0.0      10.65.0.1  0.0.0.0  UG    0      0        0 eth0
-        if (len(toks) < 6 or toks[0] == "Kernel" or
-                toks[0] == "Destination" or toks[0] == "Internet" or
-                toks[0] == "Internet6" or toks[0] == "Routing"):
+        if (
+            len(toks) < 6
+            or toks[0] == "Kernel"
+            or toks[0] == "Destination"
+            or toks[0] == "Internet"
+            or toks[0] == "Internet6"
+            or toks[0] == "Routing"
+        ):
             continue
         if len(toks) < 8:
             toks.append("-")
@@ -346,20 +365,21 @@ def _netdev_route_info_netstat(route_data):
             toks[7] = toks[5]
             toks[5] = "-"
         entry = {
-            'destination': toks[0],
-            'gateway': toks[1],
-            'genmask': toks[2],
-            'flags': toks[3],
-            'metric': toks[4],
-            'ref': toks[5],
-            'use': toks[6],
-            'iface': toks[7],
+            "destination": toks[0],
+            "gateway": toks[1],
+            "genmask": toks[2],
+            "flags": toks[3],
+            "metric": toks[4],
+            "ref": toks[5],
+            "use": toks[6],
+            "iface": toks[7],
         }
-        routes['ipv4'].append(entry)
+        routes["ipv4"].append(entry)
 
     try:
         (route_data6, _err6) = subp.subp(
-            ["netstat", "-A", "inet6", "--route", "--numeric"], rcs=[0, 1])
+            ["netstat", "-A", "inet6", "--route", "--numeric"], rcs=[0, 1]
+        )
     except subp.ProcessExecutionError:
         pass
     else:
@@ -368,44 +388,52 @@ def _netdev_route_info_netstat(route_data):
             if not line:
                 continue
             toks = line.split()
-            if (len(toks) < 7 or toks[0] == "Kernel" or
-                    toks[0] == "Destination" or toks[0] == "Internet" or
-                    toks[0] == "Proto" or toks[0] == "Active"):
+            if (
+                len(toks) < 7
+                or toks[0] == "Kernel"
+                or toks[0] == "Destination"
+                or toks[0] == "Internet"
+                or toks[0] == "Proto"
+                or toks[0] == "Active"
+            ):
                 continue
             entry = {
-                'destination': toks[0],
-                'gateway': toks[1],
-                'flags': toks[2],
-                'metric': toks[3],
-                'ref': toks[4],
-                'use': toks[5],
-                'iface': toks[6],
+                "destination": toks[0],
+                "gateway": toks[1],
+                "flags": toks[2],
+                "metric": toks[3],
+                "ref": toks[4],
+                "use": toks[5],
+                "iface": toks[6],
             }
             # skip lo interface on ipv6
-            if entry['iface'] == "lo":
+            if entry["iface"] == "lo":
                 continue
             # strip /128 from address if it's included
-            if entry['destination'].endswith('/128'):
-                entry['destination'] = re.sub(
-                    r'\/128$', '', entry['destination'])
-            routes['ipv6'].append(entry)
+            if entry["destination"].endswith("/128"):
+                entry["destination"] = re.sub(
+                    r"\/128$", "", entry["destination"]
+                )
+            routes["ipv6"].append(entry)
     return routes
 
 
 def route_info():
     routes = {}
-    if subp.which('ip'):
+    if subp.which("ip"):
         # Try iproute first of all
         (iproute_out, _err) = subp.subp(["ip", "-o", "route", "list"])
         routes = _netdev_route_info_iproute(iproute_out)
-    elif subp.which('netstat'):
+    elif subp.which("netstat"):
         # Fall back to net-tools if iproute2 is not present
         (route_out, _err) = subp.subp(
-            ["netstat", "--route", "--numeric", "--extend"], rcs=[0, 1])
+            ["netstat", "--route", "--numeric", "--extend"], rcs=[0, 1]
+        )
         routes = _netdev_route_info_netstat(route_out)
     else:
         LOG.warning(
-            "Could not print routes: missing 'ip' and 'netstat' commands")
+            "Could not print routes: missing 'ip' and 'netstat' commands"
+        )
     return routes
 
 
@@ -418,24 +446,42 @@ def netdev_pformat():
         lines.append(
             util.center(
                 "Net device info failed ({error})".format(error=str(e)),
-                '!', 80))
+                "!",
+                80,
+            )
+        )
     else:
         if not netdev:
-            return '\n'
-        fields = ['Device', 'Up', 'Address', 'Mask', 'Scope', 'Hw-Address']
+            return "\n"
+        fields = ["Device", "Up", "Address", "Mask", "Scope", "Hw-Address"]
         tbl = SimpleTable(fields)
         for (dev, data) in sorted(netdev.items()):
-            for addr in data.get('ipv4'):
+            for addr in data.get("ipv4"):
                 tbl.add_row(
-                    (dev, data["up"], addr["ip"], addr["mask"],
-                     addr.get('scope', empty), data["hwaddr"]))
-            for addr in data.get('ipv6'):
+                    (
+                        dev,
+                        data["up"],
+                        addr["ip"],
+                        addr["mask"],
+                        addr.get("scope", empty),
+                        data["hwaddr"],
+                    )
+                )
+            for addr in data.get("ipv6"):
                 tbl.add_row(
-                    (dev, data["up"], addr["ip"], empty,
-                     addr.get("scope6", empty), data["hwaddr"]))
-            if len(data.get('ipv6')) + len(data.get('ipv4')) == 0:
-                tbl.add_row((dev, data["up"], empty, empty, empty,
-                             data["hwaddr"]))
+                    (
+                        dev,
+                        data["up"],
+                        addr["ip"],
+                        empty,
+                        addr.get("scope6", empty),
+                        data["hwaddr"],
+                    )
+                )
+            if len(data.get("ipv6")) + len(data.get("ipv4")) == 0:
+                tbl.add_row(
+                    (dev, data["up"], empty, empty, empty, data["hwaddr"])
+                )
         netdev_s = tbl.get_string()
         max_len = len(max(netdev_s.splitlines(), key=len))
         header = util.center("Net device info", "+", max_len)
@@ -450,33 +496,59 @@ def route_pformat():
     except Exception as e:
         lines.append(
             util.center(
-                'Route info failed ({error})'.format(error=str(e)),
-                '!', 80))
+                "Route info failed ({error})".format(error=str(e)), "!", 80
+            )
+        )
         util.logexc(LOG, "Route info failed: %s" % e)
     else:
-        if routes.get('ipv4'):
-            fields_v4 = ['Route', 'Destination', 'Gateway',
-                         'Genmask', 'Interface', 'Flags']
+        if routes.get("ipv4"):
+            fields_v4 = [
+                "Route",
+                "Destination",
+                "Gateway",
+                "Genmask",
+                "Interface",
+                "Flags",
+            ]
             tbl_v4 = SimpleTable(fields_v4)
-            for (n, r) in enumerate(routes.get('ipv4')):
+            for (n, r) in enumerate(routes.get("ipv4")):
                 route_id = str(n)
-                tbl_v4.add_row([route_id, r['destination'],
-                                r['gateway'], r['genmask'],
-                                r['iface'], r['flags']])
+                tbl_v4.add_row(
+                    [
+                        route_id,
+                        r["destination"],
+                        r["gateway"],
+                        r["genmask"],
+                        r["iface"],
+                        r["flags"],
+                    ]
+                )
             route_s = tbl_v4.get_string()
             max_len = len(max(route_s.splitlines(), key=len))
             header = util.center("Route IPv4 info", "+", max_len)
             lines.extend([header, route_s])
-        if routes.get('ipv6'):
-            fields_v6 = ['Route', 'Destination', 'Gateway', 'Interface',
-                         'Flags']
+        if routes.get("ipv6"):
+            fields_v6 = [
+                "Route",
+                "Destination",
+                "Gateway",
+                "Interface",
+                "Flags",
+            ]
             tbl_v6 = SimpleTable(fields_v6)
-            for (n, r) in enumerate(routes.get('ipv6')):
+            for (n, r) in enumerate(routes.get("ipv6")):
                 route_id = str(n)
-                if r['iface'] == 'lo':
+                if r["iface"] == "lo":
                     continue
-                tbl_v6.add_row([route_id, r['destination'],
-                                r['gateway'], r['iface'], r['flags']])
+                tbl_v6.add_row(
+                    [
+                        route_id,
+                        r["destination"],
+                        r["gateway"],
+                        r["iface"],
+                        r["flags"],
+                    ]
+                )
             route_s = tbl_v6.get_string()
             max_len = len(max(route_s.splitlines(), key=len))
             header = util.center("Route IPv6 info", "+", max_len)
@@ -484,7 +556,7 @@ def route_pformat():
     return "\n".join(lines) + "\n"
 
 
-def debug_info(prefix='ci-info: '):
+def debug_info(prefix="ci-info: "):
     lines = []
     netdev_lines = netdev_pformat().splitlines()
     if prefix:
@@ -500,4 +572,5 @@ def debug_info(prefix='ci-info: '):
         lines.extend(route_lines)
     return "\n".join(lines)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/patcher.py b/cloudinit/patcher.py
index 186d8ad8..516be22c 100644
--- a/cloudinit/patcher.py
+++ b/cloudinit/patcher.py
@@ -10,8 +10,9 @@ import logging
 import sys
 
 # Default fallback format
-FALL_FORMAT = ('FALLBACK: %(asctime)s - %(filename)s[%(levelname)s]: ' +
-               '%(message)s')
+FALL_FORMAT = (
+    "FALLBACK: %(asctime)s - %(filename)s[%(levelname)s]: " + "%(message)s"
+)
 
 
 class QuietStreamHandler(logging.StreamHandler):
@@ -34,6 +35,8 @@ def patch_logging():
             fallback_handler.flush()
         except IOError:
             pass
-    setattr(logging.Handler, 'handleError', handleError)
+
+    setattr(logging.Handler, "handleError", handleError)
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/registry.py b/cloudinit/registry.py
index 8e495641..5044e760 100644
--- a/cloudinit/registry.py
+++ b/cloudinit/registry.py
@@ -18,7 +18,8 @@ class DictRegistry(object):
         """Add item to the registry."""
         if key in self._items:
             raise ValueError(
-                'Item already registered with key {0}'.format(key))
+                "Item already registered with key {0}".format(key)
+            )
         self._items[key] = item
 
     def unregister_item(self, key, force=True):
@@ -36,4 +37,5 @@ class DictRegistry(object):
         """
         return copy.copy(self._items)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/reporting/__init__.py b/cloudinit/reporting/__init__.py
index ed5c7038..06b5b49f 100644
--- a/cloudinit/reporting/__init__.py
+++ b/cloudinit/reporting/__init__.py
@@ -13,7 +13,7 @@ from ..registry import DictRegistry
 from .handlers import available_handlers
 
 DEFAULT_CONFIG = {
-    'logging': {'type': 'log'},
+    "logging": {"type": "log"},
 }
 
 
@@ -28,10 +28,11 @@ def update_configuration(config):
     for handler_name, handler_config in config.items():
         if not handler_config:
             instantiated_handler_registry.unregister_item(
-                handler_name, force=True)
+                handler_name, force=True
+            )
             continue
         handler_config = handler_config.copy()
-        cls = available_handlers.registered_items[handler_config.pop('type')]
+        cls = available_handlers.registered_items[handler_config.pop("type")]
         instantiated_handler_registry.unregister_item(handler_name)
         instance = cls(**handler_config)
         instantiated_handler_registry.register_item(handler_name, instance)
@@ -39,7 +40,7 @@ def update_configuration(config):
 
 def flush_events():
     for _, handler in instantiated_handler_registry.registered_items.items():
-        if hasattr(handler, 'flush'):
+        if hasattr(handler, "flush"):
             handler.flush()
 
 
diff --git a/cloudinit/reporting/events.py b/cloudinit/reporting/events.py
index 9afad747..e53186a3 100644
--- a/cloudinit/reporting/events.py
+++ b/cloudinit/reporting/events.py
@@ -12,12 +12,12 @@ import base64
 import os.path
 import time
 
-from . import instantiated_handler_registry, available_handlers
+from . import available_handlers, instantiated_handler_registry
 
-FINISH_EVENT_TYPE = 'finish'
-START_EVENT_TYPE = 'start'
+FINISH_EVENT_TYPE = "finish"
+START_EVENT_TYPE = "start"
 
-DEFAULT_EVENT_ORIGIN = 'cloudinit'
+DEFAULT_EVENT_ORIGIN = "cloudinit"
 
 
 class _nameset(set):
@@ -33,8 +33,14 @@ status = _nameset(("SUCCESS", "WARN", "FAIL"))
 class ReportingEvent(object):
     """Encapsulation of event formatting."""
 
-    def __init__(self, event_type, name, description,
-                 origin=DEFAULT_EVENT_ORIGIN, timestamp=None):
+    def __init__(
+        self,
+        event_type,
+        name,
+        description,
+        origin=DEFAULT_EVENT_ORIGIN,
+        timestamp=None,
+    ):
         self.event_type = event_type
         self.name = name
         self.description = description
@@ -45,22 +51,28 @@ class ReportingEvent(object):
 
     def as_string(self):
         """The event represented as a string."""
-        return '{0}: {1}: {2}'.format(
-            self.event_type, self.name, self.description)
+        return "{0}: {1}: {2}".format(
+            self.event_type, self.name, self.description
+        )
 
     def as_dict(self):
         """The event represented as a dictionary."""
-        return {'name': self.name, 'description': self.description,
-                'event_type': self.event_type, 'origin': self.origin,
-                'timestamp': self.timestamp}
+        return {
+            "name": self.name,
+            "description": self.description,
+            "event_type": self.event_type,
+            "origin": self.origin,
+            "timestamp": self.timestamp,
+        }
 
 
 class FinishReportingEvent(ReportingEvent):
-
-    def __init__(self, name, description, result=status.SUCCESS,
-                 post_files=None):
+    def __init__(
+        self, name, description, result=status.SUCCESS, post_files=None
+    ):
         super(FinishReportingEvent, self).__init__(
-            FINISH_EVENT_TYPE, name, description)
+            FINISH_EVENT_TYPE, name, description
+        )
         self.result = result
         if post_files is None:
             post_files = []
@@ -69,15 +81,16 @@ class FinishReportingEvent(ReportingEvent):
             raise ValueError("Invalid result: %s" % result)
 
     def as_string(self):
-        return '{0}: {1}: {2}: {3}'.format(
-            self.event_type, self.name, self.result, self.description)
+        return "{0}: {1}: {2}: {3}".format(
+            self.event_type, self.name, self.result, self.description
+        )
 
     def as_dict(self):
         """The event represented as json friendly."""
         data = super(FinishReportingEvent, self).as_dict()
-        data['result'] = self.result
+        data["result"] = self.result
         if self.post_files:
-            data['files'] = _collect_file_info(self.post_files)
+            data["files"] = _collect_file_info(self.post_files)
         return data
 
 
@@ -110,14 +123,16 @@ def report_event(event, excluded_handler_types=None):
         handler.publish_event(event)
 
 
-def report_finish_event(event_name, event_description,
-                        result=status.SUCCESS, post_files=None):
+def report_finish_event(
+    event_name, event_description, result=status.SUCCESS, post_files=None
+):
     """Report a "finish" event.
 
     See :py:func:`.report_event` for parameter details.
     """
-    event = FinishReportingEvent(event_name, event_description, result,
-                                 post_files=post_files)
+    event = FinishReportingEvent(
+        event_name, event_description, result, post_files=post_files
+    )
     return report_event(event)
 
 
@@ -174,9 +189,16 @@ class ReportEventStack(object):
         Default value, if None, is an empty list.
     """
 
-    def __init__(self, name, description, message=None, parent=None,
-                 reporting_enabled=None, result_on_exception=status.FAIL,
-                 post_files=None):
+    def __init__(
+        self,
+        name,
+        description,
+        message=None,
+        parent=None,
+        reporting_enabled=None,
+        result_on_exception=status.FAIL,
+        post_files=None,
+    ):
         self.parent = parent
         self.name = name
         self.description = description
@@ -196,14 +218,22 @@ class ReportEventStack(object):
         self.reporting_enabled = reporting_enabled
 
         if parent:
-            self.fullname = '/'.join((parent.fullname, name,))
+            self.fullname = "/".join(
+                (
+                    parent.fullname,
+                    name,
+                )
+            )
         else:
             self.fullname = self.name
         self.children = {}
 
     def __repr__(self):
-        return ("ReportEventStack(%s, %s, reporting_enabled=%s)" %
-                (self.name, self.description, self.reporting_enabled))
+        return "ReportEventStack(%s, %s, reporting_enabled=%s)" % (
+            self.name,
+            self.description,
+            self.reporting_enabled,
+        )
 
     def __enter__(self):
         self.result = status.SUCCESS
@@ -251,8 +281,9 @@ class ReportEventStack(object):
         if self.parent:
             self.parent.children[self.name] = (result, msg)
         if self.reporting_enabled:
-            report_finish_event(self.fullname, msg, result,
-                                post_files=self.post_files)
+            report_finish_event(
+                self.fullname, msg, result, post_files=self.post_files
+            )
 
 
 def _collect_file_info(files):
@@ -265,8 +296,8 @@ def _collect_file_info(files):
         else:
             with open(fname, "rb") as fp:
                 content = base64.b64encode(fp.read()).decode()
-        ret.append({'path': fname, 'content': content,
-                    'encoding': 'base64'})
+        ret.append({"path": fname, "content": content, "encoding": "base64"})
     return ret
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/reporting/handlers.py b/cloudinit/reporting/handlers.py
index e32739ef..e163e168 100755
--- a/cloudinit/reporting/handlers.py
+++ b/cloudinit/reporting/handlers.py
@@ -12,8 +12,8 @@ import uuid
 from datetime import datetime
 
 from cloudinit import log as logging
+from cloudinit import url_helper, util
 from cloudinit.registry import DictRegistry
-from cloudinit import (url_helper, util)
 
 LOG = logging.getLogger(__name__)
 
@@ -55,7 +55,8 @@ class LogHandler(ReportingHandler):
 
     def publish_event(self, event):
         logger = logging.getLogger(
-            '.'.join(['cloudinit', 'reporting', event.event_type, event.name]))
+            ".".join(["cloudinit", "reporting", event.event_type, event.name])
+        )
         logger.log(self.level, event.as_string())
 
 
@@ -67,15 +68,25 @@ class PrintHandler(ReportingHandler):
 
 
 class WebHookHandler(ReportingHandler):
-    def __init__(self, endpoint, consumer_key=None, token_key=None,
-                 token_secret=None, consumer_secret=None, timeout=None,
-                 retries=None):
+    def __init__(
+        self,
+        endpoint,
+        consumer_key=None,
+        token_key=None,
+        token_secret=None,
+        consumer_secret=None,
+        timeout=None,
+        retries=None,
+    ):
         super(WebHookHandler, self).__init__()
 
         if any([consumer_key, token_key, token_secret, consumer_secret]):
             self.oauth_helper = url_helper.OauthUrlHelper(
-                consumer_key=consumer_key, token_key=token_key,
-                token_secret=token_secret, consumer_secret=consumer_secret)
+                consumer_key=consumer_key,
+                token_key=token_key,
+                token_secret=token_secret,
+                consumer_secret=consumer_secret,
+            )
         else:
             self.oauth_helper = None
         self.endpoint = endpoint
@@ -90,9 +101,12 @@ class WebHookHandler(ReportingHandler):
             readurl = url_helper.readurl
         try:
             return readurl(
-                self.endpoint, data=json.dumps(event.as_dict()),
+                self.endpoint,
+                data=json.dumps(event.as_dict()),
                 timeout=self.timeout,
-                retries=self.retries, ssl_details=self.ssl_details)
+                retries=self.retries,
+                ssl_details=self.ssl_details,
+            )
         except Exception:
             LOG.warning("failed posting event: %s", event.as_string())
 
@@ -112,33 +126,35 @@ class HyperVKvpReportingHandler(ReportingHandler):
     For more information, see
     https://technet.microsoft.com/en-us/library/dn798287.aspx#Linux%20guests
     """
+
     HV_KVP_EXCHANGE_MAX_VALUE_SIZE = 2048
     # The maximum value size expected in Azure
     HV_KVP_AZURE_MAX_VALUE_SIZE = 1024
     HV_KVP_EXCHANGE_MAX_KEY_SIZE = 512
-    HV_KVP_RECORD_SIZE = (HV_KVP_EXCHANGE_MAX_KEY_SIZE +
-                          HV_KVP_EXCHANGE_MAX_VALUE_SIZE)
-    EVENT_PREFIX = 'CLOUD_INIT'
-    MSG_KEY = 'msg'
-    RESULT_KEY = 'result'
-    DESC_IDX_KEY = 'msg_i'
-    JSON_SEPARATORS = (',', ':')
-    KVP_POOL_FILE_GUEST = '/var/lib/hyperv/.kvp_pool_1'
+    HV_KVP_RECORD_SIZE = (
+        HV_KVP_EXCHANGE_MAX_KEY_SIZE + HV_KVP_EXCHANGE_MAX_VALUE_SIZE
+    )
+    EVENT_PREFIX = "CLOUD_INIT"
+    MSG_KEY = "msg"
+    RESULT_KEY = "result"
+    DESC_IDX_KEY = "msg_i"
+    JSON_SEPARATORS = (",", ":")
+    KVP_POOL_FILE_GUEST = "/var/lib/hyperv/.kvp_pool_1"
     _already_truncated_pool_file = False
 
-    def __init__(self,
-                 kvp_file_path=KVP_POOL_FILE_GUEST,
-                 event_types=None):
+    def __init__(self, kvp_file_path=KVP_POOL_FILE_GUEST, event_types=None):
         super(HyperVKvpReportingHandler, self).__init__()
         self._kvp_file_path = kvp_file_path
         HyperVKvpReportingHandler._truncate_guest_pool_file(
-            self._kvp_file_path)
+            self._kvp_file_path
+        )
 
         self._event_types = event_types
         self.q = queue.Queue()
         self.incarnation_no = self._get_incarnation_no()
-        self.event_key_prefix = "{0}|{1}".format(self.EVENT_PREFIX,
-                                                 self.incarnation_no)
+        self.event_key_prefix = "{0}|{1}".format(
+            self.EVENT_PREFIX, self.incarnation_no
+        )
         self.publish_thread = threading.Thread(
             target=self._publish_event_routine
         )
@@ -184,7 +200,7 @@ class HyperVKvpReportingHandler(ReportingHandler):
 
     def _iterate_kvps(self, offset):
         """iterate the kvp file from the current offset."""
-        with open(self._kvp_file_path, 'rb') as f:
+        with open(self._kvp_file_path, "rb") as f:
             fcntl.flock(f, fcntl.LOCK_EX)
             f.seek(offset)
             record_data = f.read(self.HV_KVP_RECORD_SIZE)
@@ -200,9 +216,9 @@ class HyperVKvpReportingHandler(ReportingHandler):
         CLOUD_INIT|<incarnation number>|<event_type>|<event_name>|<uuid>
         [|subevent_index]
         """
-        return "{0}|{1}|{2}|{3}".format(self.event_key_prefix,
-                                        event.event_type, event.name,
-                                        uuid.uuid4())
+        return "{0}|{1}|{2}|{3}".format(
+            self.event_key_prefix, event.event_type, event.name, uuid.uuid4()
+        )
 
     def _encode_kvp_item(self, key, value):
         data = struct.pack(
@@ -220,19 +236,27 @@ class HyperVKvpReportingHandler(ReportingHandler):
         record_data_len = len(record_data)
         if record_data_len != self.HV_KVP_RECORD_SIZE:
             raise ReportException(
-                "record_data len not correct {0} {1}."
-                .format(record_data_len, self.HV_KVP_RECORD_SIZE))
-        k = (record_data[0:self.HV_KVP_EXCHANGE_MAX_KEY_SIZE].decode('utf-8')
-                                                             .strip('\x00'))
+                "record_data len not correct {0} {1}.".format(
+                    record_data_len, self.HV_KVP_RECORD_SIZE
+                )
+            )
+        k = (
+            record_data[0 : self.HV_KVP_EXCHANGE_MAX_KEY_SIZE]
+            .decode("utf-8")
+            .strip("\x00")
+        )
         v = (
             record_data[
-                self.HV_KVP_EXCHANGE_MAX_KEY_SIZE:self.HV_KVP_RECORD_SIZE
-            ].decode('utf-8').strip('\x00'))
+                self.HV_KVP_EXCHANGE_MAX_KEY_SIZE : self.HV_KVP_RECORD_SIZE
+            ]
+            .decode("utf-8")
+            .strip("\x00")
+        )
 
-        return {'key': k, 'value': v}
+        return {"key": k, "value": v}
 
     def _append_kvp_item(self, record_data):
-        with open(self._kvp_file_path, 'ab') as f:
+        with open(self._kvp_file_path, "ab") as f:
             fcntl.flock(f, fcntl.LOCK_EX)
             for data in record_data:
                 f.write(data)
@@ -242,22 +266,25 @@ class HyperVKvpReportingHandler(ReportingHandler):
     def _break_down(self, key, meta_data, description):
         del meta_data[self.MSG_KEY]
         des_in_json = json.dumps(description)
-        des_in_json = des_in_json[1:(len(des_in_json) - 1)]
+        des_in_json = des_in_json[1 : (len(des_in_json) - 1)]
         i = 0
         result_array = []
-        message_place_holder = "\"" + self.MSG_KEY + "\":\"\""
+        message_place_holder = '"' + self.MSG_KEY + '":""'
         while True:
             meta_data[self.DESC_IDX_KEY] = i
-            meta_data[self.MSG_KEY] = ''
-            data_without_desc = json.dumps(meta_data,
-                                           separators=self.JSON_SEPARATORS)
+            meta_data[self.MSG_KEY] = ""
+            data_without_desc = json.dumps(
+                meta_data, separators=self.JSON_SEPARATORS
+            )
             room_for_desc = (
-                self.HV_KVP_AZURE_MAX_VALUE_SIZE -
-                len(data_without_desc) - 8)
+                self.HV_KVP_AZURE_MAX_VALUE_SIZE - len(data_without_desc) - 8
+            )
             value = data_without_desc.replace(
                 message_place_holder,
                 '"{key}":"{desc}"'.format(
-                    key=self.MSG_KEY, desc=des_in_json[:room_for_desc]))
+                    key=self.MSG_KEY, desc=des_in_json[:room_for_desc]
+                ),
+            )
             subkey = "{}|{}".format(key, i)
             result_array.append(self._encode_kvp_item(subkey, value))
             i += 1
@@ -276,8 +303,9 @@ class HyperVKvpReportingHandler(ReportingHandler):
         meta_data = {
             "name": event.name,
             "type": event.event_type,
-            "ts": (datetime.utcfromtimestamp(event.timestamp)
-                   .isoformat() + 'Z'),
+            "ts": (
+                datetime.utcfromtimestamp(event.timestamp).isoformat() + "Z"
+            ),
         }
         if hasattr(event, self.RESULT_KEY):
             meta_data[self.RESULT_KEY] = event.result
@@ -327,14 +355,14 @@ class HyperVKvpReportingHandler(ReportingHandler):
             self.q.put(event)
 
     def flush(self):
-        LOG.debug('HyperVReportingHandler flushing remaining events')
+        LOG.debug("HyperVReportingHandler flushing remaining events")
         self.q.join()
 
 
 available_handlers = DictRegistry()
-available_handlers.register_item('log', LogHandler)
-available_handlers.register_item('print', PrintHandler)
-available_handlers.register_item('webhook', WebHookHandler)
-available_handlers.register_item('hyperv', HyperVKvpReportingHandler)
+available_handlers.register_item("log", LogHandler)
+available_handlers.register_item("print", PrintHandler)
+available_handlers.register_item("webhook", WebHookHandler)
+available_handlers.register_item("hyperv", HyperVKvpReportingHandler)
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/safeyaml.py b/cloudinit/safeyaml.py
index b95df27d..ba0e88c8 100644
--- a/cloudinit/safeyaml.py
+++ b/cloudinit/safeyaml.py
@@ -15,8 +15,9 @@ class _CustomSafeLoader(yaml.SafeLoader):
 
 
 _CustomSafeLoader.add_constructor(
-    'tag:yaml.org,2002:python/unicode',
-    _CustomSafeLoader.construct_python_unicode)
+    "tag:yaml.org,2002:python/unicode",
+    _CustomSafeLoader.construct_python_unicode,
+)
 
 
 class NoAliasSafeDumper(yaml.dumper.SafeDumper):
@@ -27,19 +28,21 @@ class NoAliasSafeDumper(yaml.dumper.SafeDumper):
 
 
 def load(blob):
-    return(yaml.load(blob, Loader=_CustomSafeLoader))
+    return yaml.load(blob, Loader=_CustomSafeLoader)
 
 
 def dumps(obj, explicit_start=True, explicit_end=True, noalias=False):
     """Return data in nicely formatted yaml."""
 
-    return yaml.dump(obj,
-                     line_break="\n",
-                     indent=4,
-                     explicit_start=explicit_start,
-                     explicit_end=explicit_end,
-                     default_flow_style=False,
-                     Dumper=(NoAliasSafeDumper
-                             if noalias else yaml.dumper.Dumper))
+    return yaml.dump(
+        obj,
+        line_break="\n",
+        indent=4,
+        explicit_start=explicit_start,
+        explicit_end=explicit_end,
+        default_flow_style=False,
+        Dumper=(NoAliasSafeDumper if noalias else yaml.dumper.Dumper),
+    )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/serial.py b/cloudinit/serial.py
index 67486e09..a6f710ef 100644
--- a/cloudinit/serial.py
+++ b/cloudinit/serial.py
@@ -16,22 +16,31 @@ except ImportError:
 
         @staticmethod
         def write(data):
-            raise IOError("Unable to perform serial `write` operation,"
-                          " pyserial not installed.")
+            raise IOError(
+                "Unable to perform serial `write` operation,"
+                " pyserial not installed."
+            )
 
         @staticmethod
         def readline():
-            raise IOError("Unable to perform serial `readline` operation,"
-                          " pyserial not installed.")
+            raise IOError(
+                "Unable to perform serial `readline` operation,"
+                " pyserial not installed."
+            )
 
         @staticmethod
         def flush():
-            raise IOError("Unable to perform serial `flush` operation,"
-                          " pyserial not installed.")
+            raise IOError(
+                "Unable to perform serial `flush` operation,"
+                " pyserial not installed."
+            )
 
         @staticmethod
         def read(size=1):
-            raise IOError("Unable to perform serial `read` operation,"
-                          " pyserial not installed.")
+            raise IOError(
+                "Unable to perform serial `read` operation,"
+                " pyserial not installed."
+            )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/settings.py b/cloudinit/settings.py
index 43c8fa24..ecc1403b 100644
--- a/cloudinit/settings.py
+++ b/cloudinit/settings.py
@@ -12,55 +12,55 @@
 CFG_ENV_NAME = "CLOUD_CFG"
 
 # This is expected to be a yaml formatted file
-CLOUD_CONFIG = '/etc/cloud/cloud.cfg'
+CLOUD_CONFIG = "/etc/cloud/cloud.cfg"
 
-RUN_CLOUD_CONFIG = '/run/cloud-init/cloud.cfg'
+RUN_CLOUD_CONFIG = "/run/cloud-init/cloud.cfg"
 
 # What u get if no config is provided
 CFG_BUILTIN = {
-    'datasource_list': [
-        'NoCloud',
-        'ConfigDrive',
-        'LXD',
-        'OpenNebula',
-        'DigitalOcean',
-        'Azure',
-        'AltCloud',
-        'OVF',
-        'MAAS',
-        'GCE',
-        'OpenStack',
-        'AliYun',
-        'Vultr',
-        'Ec2',
-        'CloudSigma',
-        'CloudStack',
-        'SmartOS',
-        'Bigstep',
-        'Scaleway',
-        'Hetzner',
-        'IBMCloud',
-        'Oracle',
-        'Exoscale',
-        'RbxCloud',
-        'UpCloud',
-        'VMware',
+    "datasource_list": [
+        "NoCloud",
+        "ConfigDrive",
+        "LXD",
+        "OpenNebula",
+        "DigitalOcean",
+        "Azure",
+        "AltCloud",
+        "OVF",
+        "MAAS",
+        "GCE",
+        "OpenStack",
+        "AliYun",
+        "Vultr",
+        "Ec2",
+        "CloudSigma",
+        "CloudStack",
+        "SmartOS",
+        "Bigstep",
+        "Scaleway",
+        "Hetzner",
+        "IBMCloud",
+        "Oracle",
+        "Exoscale",
+        "RbxCloud",
+        "UpCloud",
+        "VMware",
         # At the end to act as a 'catch' when none of the above work...
-        'None',
+        "None",
     ],
-    'def_log_file': '/var/log/cloud-init.log',
-    'log_cfgs': [],
-    'syslog_fix_perms': ['syslog:adm', 'root:adm', 'root:wheel', 'root:root'],
-    'system_info': {
-        'paths': {
-            'cloud_dir': '/var/lib/cloud',
-            'templates_dir': '/etc/cloud/templates/',
+    "def_log_file": "/var/log/cloud-init.log",
+    "log_cfgs": [],
+    "syslog_fix_perms": ["syslog:adm", "root:adm", "root:wheel", "root:root"],
+    "system_info": {
+        "paths": {
+            "cloud_dir": "/var/lib/cloud",
+            "templates_dir": "/etc/cloud/templates/",
         },
-        'distro': 'ubuntu',
-        'network': {'renderers': None},
+        "distro": "ubuntu",
+        "network": {"renderers": None},
     },
-    'vendor_data': {'enabled': True, 'prefix': []},
-    'vendor_data2': {'enabled': True, 'prefix': []},
+    "vendor_data": {"enabled": True, "prefix": []},
+    "vendor_data2": {"enabled": True, "prefix": []},
 }
 
 # Valid frequencies of handlers/modules
diff --git a/cloudinit/signal_handler.py b/cloudinit/signal_handler.py
index 9272d22d..382c4616 100644
--- a/cloudinit/signal_handler.py
+++ b/cloudinit/signal_handler.py
@@ -20,11 +20,11 @@ LOG = logging.getLogger(__name__)
 
 BACK_FRAME_TRACE_DEPTH = 3
 EXIT_FOR = {
-    signal.SIGINT: ('Cloud-init %(version)s received SIGINT, exiting...', 1),
-    signal.SIGTERM: ('Cloud-init %(version)s received SIGTERM, exiting...', 1),
+    signal.SIGINT: ("Cloud-init %(version)s received SIGINT, exiting...", 1),
+    signal.SIGTERM: ("Cloud-init %(version)s received SIGTERM, exiting...", 1),
     # Can't be caught...
     # signal.SIGKILL: ('Cloud-init killed, exiting...', 1),
-    signal.SIGABRT: ('Cloud-init %(version)s received SIGABRT, exiting...', 1),
+    signal.SIGABRT: ("Cloud-init %(version)s received SIGABRT, exiting...", 1),
 }
 
 
@@ -41,12 +41,11 @@ def _pprint_frame(frame, depth, max_depth, contents):
 
 def _handle_exit(signum, frame):
     (msg, rc) = EXIT_FOR[signum]
-    msg = msg % ({'version': vr.version_string()})
+    msg = msg % ({"version": vr.version_string()})
     contents = StringIO()
     contents.write("%s\n" % (msg))
     _pprint_frame(frame, 1, BACK_FRAME_TRACE_DEPTH, contents)
-    util.multi_log(contents.getvalue(),
-                   console=True, stderr=False, log=LOG)
+    util.multi_log(contents.getvalue(), console=True, stderr=False, log=LOG)
     sys.exit(rc)
 
 
@@ -57,4 +56,5 @@ def attach_handlers():
     sigs_attached += len(EXIT_FOR)
     return sigs_attached
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/simpletable.py b/cloudinit/simpletable.py
index ca663cce..90281e06 100644
--- a/cloudinit/simpletable.py
+++ b/cloudinit/simpletable.py
@@ -22,27 +22,33 @@ class SimpleTable(object):
 
     def update_column_widths(self, values):
         for i, value in enumerate(values):
-            self.column_widths[i] = max(
-                len(value),
-                self.column_widths[i])
+            self.column_widths[i] = max(len(value), self.column_widths[i])
 
     def add_row(self, values):
         if len(values) > len(self.fields):
-            raise TypeError('too many values')
+            raise TypeError("too many values")
         values = [str(value) for value in values]
         self.rows.append(values)
         self.update_column_widths(values)
 
     def _hdiv(self):
         """Returns a horizontal divider for the table."""
-        return '+' + '+'.join(
-            ['-' * (w + 2) for w in self.column_widths]) + '+'
+        return (
+            "+" + "+".join(["-" * (w + 2) for w in self.column_widths]) + "+"
+        )
 
     def _row(self, row):
         """Returns a formatted row."""
-        return '|' + '|'.join(
-            [col.center(self.column_widths[i] + 2)
-                for i, col in enumerate(row)]) + '|'
+        return (
+            "|"
+            + "|".join(
+                [
+                    col.center(self.column_widths[i] + 2)
+                    for i, col in enumerate(row)
+                ]
+            )
+            + "|"
+        )
 
     def __str__(self):
         """Returns a string representation of the table with lines around.
@@ -56,7 +62,7 @@ class SimpleTable(object):
         """
         lines = [self._hdiv(), self._row(self.fields), self._hdiv()]
         lines += [self._row(r) for r in self.rows] + [self._hdiv()]
-        return '\n'.join(lines)
+        return "\n".join(lines)
 
     def get_string(self):
         return self.__str__()
diff --git a/cloudinit/sources/DataSourceAliYun.py b/cloudinit/sources/DataSourceAliYun.py
index 09052873..37f512e3 100644
--- a/cloudinit/sources/DataSourceAliYun.py
+++ b/cloudinit/sources/DataSourceAliYun.py
@@ -1,7 +1,6 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import dmi
-from cloudinit import sources
+from cloudinit import dmi, sources
 from cloudinit.sources import DataSourceEc2 as EC2
 
 ALIYUN_PRODUCT = "Alibaba Cloud ECS"
@@ -9,18 +8,18 @@ ALIYUN_PRODUCT = "Alibaba Cloud ECS"
 
 class DataSourceAliYun(EC2.DataSourceEc2):
 
-    dsname = 'AliYun'
-    metadata_urls = ['http://100.100.100.200']
+    dsname = "AliYun"
+    metadata_urls = ["http://100.100.100.200"]
 
     # The minimum supported metadata_version from the ec2 metadata apis
-    min_metadata_version = '2016-01-01'
+    min_metadata_version = "2016-01-01"
     extended_metadata_versions = []
 
     def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
-        return self.metadata.get('hostname', 'localhost.localdomain')
+        return self.metadata.get("hostname", "localhost.localdomain")
 
     def get_public_ssh_keys(self):
-        return parse_public_keys(self.metadata.get('public-keys', {}))
+        return parse_public_keys(self.metadata.get("public-keys", {}))
 
     def _get_cloud_name(self):
         if _is_aliyun():
@@ -30,7 +29,7 @@ class DataSourceAliYun(EC2.DataSourceEc2):
 
 
 def _is_aliyun():
-    return dmi.read_dmi_data('system-product-name') == ALIYUN_PRODUCT
+    return dmi.read_dmi_data("system-product-name") == ALIYUN_PRODUCT
 
 
 def parse_public_keys(public_keys):
@@ -41,7 +40,7 @@ def parse_public_keys(public_keys):
         elif isinstance(key_body, list):
             keys.extend(key_body)
         elif isinstance(key_body, dict):
-            key = key_body.get('openssh-key', [])
+            key = key_body.get("openssh-key", [])
             if isinstance(key, str):
                 keys.append(key.strip())
             elif isinstance(key, list):
@@ -59,4 +58,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceAltCloud.py b/cloudinit/sources/DataSourceAltCloud.py
index cd93412a..9029b535 100644
--- a/cloudinit/sources/DataSourceAltCloud.py
+++ b/cloudinit/sources/DataSourceAltCloud.py
@@ -7,10 +7,10 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-'''
+"""
 This file contains code used to gather the user data passed to an
 instance on RHEVm and vSphere.
-'''
+"""
 
 import errno
 import os
@@ -18,29 +18,26 @@ import os.path
 
 from cloudinit import dmi
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import sources, subp, util
 
 LOG = logging.getLogger(__name__)
 
 # Needed file paths
-CLOUD_INFO_FILE = '/etc/sysconfig/cloud-info'
+CLOUD_INFO_FILE = "/etc/sysconfig/cloud-info"
 
 # Shell command lists
-CMD_PROBE_FLOPPY = ['modprobe', 'floppy']
+CMD_PROBE_FLOPPY = ["modprobe", "floppy"]
 
 META_DATA_NOT_SUPPORTED = {
-    'block-device-mapping': {},
-    'instance-id': 455,
-    'local-hostname': 'localhost',
-    'placement': {},
+    "block-device-mapping": {},
+    "instance-id": 455,
+    "local-hostname": "localhost",
+    "placement": {},
 }
 
 
 def read_user_data_callback(mount_dir):
-    '''
+    """
     Description:
         This callback will be applied by util.mount_cb() on the mounted
         file.
@@ -55,10 +52,10 @@ def read_user_data_callback(mount_dir):
     Returns:
         User Data
 
-    '''
+    """
 
-    deltacloud_user_data_file = mount_dir + '/deltacloud-user-data.txt'
-    user_data_file = mount_dir + '/user-data.txt'
+    deltacloud_user_data_file = mount_dir + "/deltacloud-user-data.txt"
+    user_data_file = mount_dir + "/user-data.txt"
 
     # First try deltacloud_user_data_file. On failure try user_data_file.
     try:
@@ -67,7 +64,7 @@ def read_user_data_callback(mount_dir):
         try:
             user_data = util.load_file(user_data_file).strip()
         except IOError:
-            util.logexc(LOG, 'Failed accessing user data file.')
+            util.logexc(LOG, "Failed accessing user data file.")
             return None
 
     return user_data
@@ -75,7 +72,7 @@ def read_user_data_callback(mount_dir):
 
 class DataSourceAltCloud(sources.DataSource):
 
-    dsname = 'AltCloud'
+    dsname = "AltCloud"
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
@@ -87,7 +84,7 @@ class DataSourceAltCloud(sources.DataSource):
         return "%s [seed=%s]" % (root, self.seed)
 
     def get_cloud_type(self):
-        '''
+        """
         Description:
             Get the type for the cloud back end this instance is running on
             by examining the string returned by reading either:
@@ -101,31 +98,34 @@ class DataSourceAltCloud(sources.DataSource):
             One of the following strings:
             'RHEV', 'VSPHERE' or 'UNKNOWN'
 
-        '''
+        """
         if os.path.exists(CLOUD_INFO_FILE):
             try:
                 cloud_type = util.load_file(CLOUD_INFO_FILE).strip().upper()
             except IOError:
-                util.logexc(LOG, 'Unable to access cloud info file at %s.',
-                            CLOUD_INFO_FILE)
-                return 'UNKNOWN'
+                util.logexc(
+                    LOG,
+                    "Unable to access cloud info file at %s.",
+                    CLOUD_INFO_FILE,
+                )
+                return "UNKNOWN"
             return cloud_type
         system_name = dmi.read_dmi_data("system-product-name")
         if not system_name:
-            return 'UNKNOWN'
+            return "UNKNOWN"
 
         sys_name = system_name.upper()
 
-        if sys_name.startswith('RHEV'):
-            return 'RHEV'
+        if sys_name.startswith("RHEV"):
+            return "RHEV"
 
-        if sys_name.startswith('VMWARE'):
-            return 'VSPHERE'
+        if sys_name.startswith("VMWARE"):
+            return "VSPHERE"
 
-        return 'UNKNOWN'
+        return "UNKNOWN"
 
     def _get_data(self):
-        '''
+        """
         Description:
             User Data is passed to the launching instance which
             is used to perform instance configuration.
@@ -140,18 +140,18 @@ class DataSourceAltCloud(sources.DataSource):
             Images not built with Imagefactory will try to
             determine what the cloud provider is based on system
             information.
-        '''
+        """
 
-        LOG.debug('Invoked get_data()')
+        LOG.debug("Invoked get_data()")
 
         cloud_type = self.get_cloud_type()
 
-        LOG.debug('cloud_type: %s', str(cloud_type))
+        LOG.debug("cloud_type: %s", str(cloud_type))
 
-        if 'RHEV' in cloud_type:
+        if "RHEV" in cloud_type:
             if self.user_data_rhevm():
                 return True
-        elif 'VSPHERE' in cloud_type:
+        elif "VSPHERE" in cloud_type:
             if self.user_data_vsphere():
                 return True
         else:
@@ -160,20 +160,20 @@ class DataSourceAltCloud(sources.DataSource):
             return False
 
         # No user data found
-        util.logexc(LOG, 'Failed accessing user data.')
+        util.logexc(LOG, "Failed accessing user data.")
         return False
 
     def _get_subplatform(self):
         """Return the subplatform metadata details."""
         cloud_type = self.get_cloud_type()
-        if not hasattr(self, 'source'):
+        if not hasattr(self, "source"):
             self.source = sources.METADATA_UNKNOWN
-        if cloud_type == 'RHEV':
-            self.source = '/dev/fd0'
-        return '%s (%s)' % (cloud_type.lower(), self.source)
+        if cloud_type == "RHEV":
+            self.source = "/dev/fd0"
+        return "%s (%s)" % (cloud_type.lower(), self.source)
 
     def user_data_rhevm(self):
-        '''
+        """
         RHEVM specific userdata read
 
          If on RHEV-M the user data will be contained on the
@@ -186,7 +186,7 @@ class DataSourceAltCloud(sources.DataSource):
                mount /dev/fd0 <tmp mount dir>
                The call back passed to util.mount_cb will do:
                    read <tmp mount dir>/<user_data_file>
-        '''
+        """
 
         return_str = None
 
@@ -194,16 +194,16 @@ class DataSourceAltCloud(sources.DataSource):
         try:
             modprobe_floppy()
         except subp.ProcessExecutionError as e:
-            util.logexc(LOG, 'Failed modprobe: %s', e)
+            util.logexc(LOG, "Failed modprobe: %s", e)
             return False
 
-        floppy_dev = '/dev/fd0'
+        floppy_dev = "/dev/fd0"
 
         # udevadm settle for floppy device
         try:
             util.udevadm_settle(exists=floppy_dev, timeout=5)
         except (subp.ProcessExecutionError, OSError) as e:
-            util.logexc(LOG, 'Failed udevadm_settle: %s\n', e)
+            util.logexc(LOG, "Failed udevadm_settle: %s\n", e)
             return False
 
         try:
@@ -212,8 +212,11 @@ class DataSourceAltCloud(sources.DataSource):
             if err.errno != errno.ENOENT:
                 raise
         except util.MountFailedError:
-            util.logexc(LOG, "Failed to mount %s when looking for user data",
-                        floppy_dev)
+            util.logexc(
+                LOG,
+                "Failed to mount %s when looking for user data",
+                floppy_dev,
+            )
 
         self.userdata_raw = return_str
         self.metadata = META_DATA_NOT_SUPPORTED
@@ -224,7 +227,7 @@ class DataSourceAltCloud(sources.DataSource):
             return False
 
     def user_data_vsphere(self):
-        '''
+        """
         vSphere specific userdata read
 
         If on vSphere the user data will be contained on the
@@ -235,10 +238,10 @@ class DataSourceAltCloud(sources.DataSource):
                mount /dev/fd0 <tmp mount dir>
                The call back passed to util.mount_cb will do:
                    read <tmp mount dir>/<user_data_file>
-        '''
+        """
 
         return_str = None
-        cdrom_list = util.find_devs_with('LABEL=CDROM')
+        cdrom_list = util.find_devs_with("LABEL=CDROM")
         for cdrom_dev in cdrom_list:
             try:
                 return_str = util.mount_cb(cdrom_dev, read_user_data_callback)
@@ -249,8 +252,11 @@ class DataSourceAltCloud(sources.DataSource):
                 if err.errno != errno.ENOENT:
                     raise
             except util.MountFailedError:
-                util.logexc(LOG, "Failed to mount %s when looking for user "
-                            "data", cdrom_dev)
+                util.logexc(
+                    LOG,
+                    "Failed to mount %s when looking for user data",
+                    cdrom_dev,
+                )
 
         self.userdata_raw = return_str
         self.metadata = META_DATA_NOT_SUPPORTED
@@ -263,7 +269,7 @@ class DataSourceAltCloud(sources.DataSource):
 
 def modprobe_floppy():
     out, _err = subp.subp(CMD_PROBE_FLOPPY)
-    LOG.debug('Command: %s\nOutput%s', ' '.join(CMD_PROBE_FLOPPY), out)
+    LOG.debug("Command: %s\nOutput%s", " ".join(CMD_PROBE_FLOPPY), out)
 
 
 # Used to match classes to dependencies
@@ -279,4 +285,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceAzure.py b/cloudinit/sources/DataSourceAzure.py
index eee98fa8..a8b403e8 100755
--- a/cloudinit/sources/DataSourceAzure.py
+++ b/cloudinit/sources/DataSourceAzure.py
@@ -5,66 +5,62 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import base64
-from collections import namedtuple
 import crypt
-from functools import partial
 import os
 import os.path
 import re
-from time import time
-from time import sleep
-from xml.dom import minidom
 import xml.etree.ElementTree as ET
+from collections import namedtuple
 from enum import Enum
+from functools import partial
+from time import sleep, time
+from xml.dom import minidom
+
 import requests
 
 from cloudinit import dmi
 from cloudinit import log as logging
-from cloudinit import net
+from cloudinit import net, sources, ssh_util, subp, util
 from cloudinit.event import EventScope, EventType
 from cloudinit.net import device_driver
 from cloudinit.net.dhcp import EphemeralDHCPv4
-from cloudinit import sources
-from cloudinit.sources.helpers import netlink
-from cloudinit import ssh_util
-from cloudinit import subp
-from cloudinit.url_helper import UrlError, readurl, retry_on_url_exc
-from cloudinit import util
 from cloudinit.reporting import events
-
+from cloudinit.sources.helpers import netlink
 from cloudinit.sources.helpers.azure import (
     DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE,
+    EphemeralDHCPv4WithReporting,
     azure_ds_reporter,
     azure_ds_telemetry_reporter,
-    get_metadata_from_fabric,
+    build_minimal_ovf,
+    dhcp_log_cb,
     get_boot_telemetry,
+    get_metadata_from_fabric,
     get_system_info,
-    report_diagnostic_event,
-    EphemeralDHCPv4WithReporting,
     is_byte_swapped,
-    dhcp_log_cb,
     push_log_to_kvp,
+    report_diagnostic_event,
     report_failure_to_fabric,
-    build_minimal_ovf)
+)
+from cloudinit.url_helper import UrlError, readurl, retry_on_url_exc
 
 LOG = logging.getLogger(__name__)
 
-DS_NAME = 'Azure'
+DS_NAME = "Azure"
 DEFAULT_METADATA = {"instance-id": "iid-AZURE-NODE"}
 
 # azure systems will always have a resource disk, and 66-azure-ephemeral.rules
 # ensures that it gets linked to this path.
-RESOURCE_DISK_PATH = '/dev/disk/cloud/azure_resource'
-LEASE_FILE = '/var/lib/dhcp/dhclient.eth0.leases'
-DEFAULT_FS = 'ext4'
+RESOURCE_DISK_PATH = "/dev/disk/cloud/azure_resource"
+LEASE_FILE = "/var/lib/dhcp/dhclient.eth0.leases"
+DEFAULT_FS = "ext4"
 # DMI chassis-asset-tag is set static for all azure instances
-AZURE_CHASSIS_ASSET_TAG = '7783-7084-3265-9085-8269-3286-77'
+AZURE_CHASSIS_ASSET_TAG = "7783-7084-3265-9085-8269-3286-77"
 REPROVISION_MARKER_FILE = "/var/lib/cloud/data/poll_imds"
 REPROVISION_NIC_ATTACH_MARKER_FILE = "/var/lib/cloud/data/wait_for_nic_attach"
 REPROVISION_NIC_DETACHED_MARKER_FILE = "/var/lib/cloud/data/nic_detached"
 REPORTED_READY_MARKER_FILE = "/var/lib/cloud/data/reported_ready"
-AGENT_SEED_DIR = '/var/lib/waagent'
-DEFAULT_PROVISIONING_ISO_DEV = '/dev/sr0'
+AGENT_SEED_DIR = "/var/lib/waagent"
+DEFAULT_PROVISIONING_ISO_DEV = "/dev/sr0"
 
 # In the event where the IMDS primary server is not
 # available, it takes 1s to fallback to the secondary one
@@ -90,10 +86,10 @@ PLATFORM_ENTROPY_SOURCE = "/sys/firmware/acpi/tables/OEM0"
 # List of static scripts and network config artifacts created by
 # stock ubuntu suported images.
 UBUNTU_EXTENDED_NETWORK_SCRIPTS = [
-    '/etc/netplan/90-hotplug-azure.yaml',
-    '/usr/local/sbin/ephemeral_eth.sh',
-    '/etc/udev/rules.d/10-net-device-added.rules',
-    '/run/network/interfaces.ephemeral.d',
+    "/etc/netplan/90-hotplug-azure.yaml",
+    "/usr/local/sbin/ephemeral_eth.sh",
+    "/etc/udev/rules.d/10-net-device-added.rules",
+    "/run/network/interfaces.ephemeral.d",
 ]
 
 # This list is used to blacklist devices that will be considered
@@ -113,7 +109,7 @@ UBUNTU_EXTENDED_NETWORK_SCRIPTS = [
 # https://docs.microsoft.com/en-us/azure/virtual-machines/dv2-dsv2-series
 # https://docs.microsoft.com/en-us/azure/virtual-machines/dv3-dsv3-series
 # https://docs.microsoft.com/en-us/azure/virtual-machines/ev3-esv3-series
-BLACKLIST_DRIVERS = ['mlx4_core', 'mlx5_core']
+BLACKLIST_DRIVERS = ["mlx4_core", "mlx5_core"]
 
 
 def find_storvscid_from_sysctl_pnpinfo(sysctl_out, deviceid):
@@ -127,11 +123,13 @@ def find_storvscid_from_sysctl_pnpinfo(sysctl_out, deviceid):
         if re.search(r"pnpinfo", line):
             fields = line.split()
             if len(fields) >= 3:
-                columns = fields[2].split('=')
-                if (len(columns) >= 2 and
-                        columns[0] == "deviceid" and
-                        columns[1].startswith(deviceid)):
-                    comps = fields[0].split('.')
+                columns = fields[2].split("=")
+                if (
+                    len(columns) >= 2
+                    and columns[0] == "deviceid"
+                    and columns[1].startswith(deviceid)
+                ):
+                    comps = fields[0].split(".")
                     return comps[2]
     return None
 
@@ -165,9 +163,9 @@ def find_dev_from_busdev(camcontrol_out, busdev):
     """
     for line in camcontrol_out.splitlines():
         if re.search(busdev, line):
-            items = line.split('(')
+            items = line.split("(")
             if len(items) == 2:
-                dev_pass = items[1].split(',')
+                dev_pass = items[1].split(",")
                 return dev_pass[0]
     return None
 
@@ -176,7 +174,7 @@ def execute_or_debug(cmd, fail_ret=None):
     try:
         return subp.subp(cmd)[0]
     except subp.ProcessExecutionError:
-        LOG.debug("Failed to execute: %s", ' '.join(cmd))
+        LOG.debug("Failed to execute: %s", " ".join(cmd))
         return fail_ret
 
 
@@ -185,11 +183,11 @@ def get_dev_storvsc_sysctl():
 
 
 def get_camcontrol_dev_bus():
-    return execute_or_debug(['camcontrol', 'devlist', '-b'])
+    return execute_or_debug(["camcontrol", "devlist", "-b"])
 
 
 def get_camcontrol_dev():
-    return execute_or_debug(['camcontrol', 'devlist'])
+    return execute_or_debug(["camcontrol", "devlist"])
 
 
 def get_resource_disk_on_freebsd(port_id):
@@ -236,8 +234,8 @@ def get_resource_disk_on_freebsd(port_id):
 
 # update the FreeBSD specific information
 if util.is_FreeBSD():
-    LEASE_FILE = '/var/db/dhclient.leases.hn0'
-    DEFAULT_FS = 'freebsd-ufs'
+    LEASE_FILE = "/var/db/dhclient.leases.hn0"
+    DEFAULT_FS = "freebsd-ufs"
     res_disk = get_resource_disk_on_freebsd(1)
     if res_disk is not None:
         LOG.debug("resource disk is not None")
@@ -248,52 +246,55 @@ if util.is_FreeBSD():
     PLATFORM_ENTROPY_SOURCE = None
 
 BUILTIN_DS_CONFIG = {
-    'data_dir': AGENT_SEED_DIR,
-    'disk_aliases': {'ephemeral0': RESOURCE_DISK_PATH},
-    'dhclient_lease_file': LEASE_FILE,
-    'apply_network_config': True,  # Use IMDS published network configuration
+    "data_dir": AGENT_SEED_DIR,
+    "disk_aliases": {"ephemeral0": RESOURCE_DISK_PATH},
+    "dhclient_lease_file": LEASE_FILE,
+    "apply_network_config": True,  # Use IMDS published network configuration
 }
 # RELEASE_BLOCKER: Xenial and earlier apply_network_config default is False
 
 BUILTIN_CLOUD_EPHEMERAL_DISK_CONFIG = {
-    'disk_setup': {
-        'ephemeral0': {'table_type': 'gpt',
-                       'layout': [100],
-                       'overwrite': True},
+    "disk_setup": {
+        "ephemeral0": {
+            "table_type": "gpt",
+            "layout": [100],
+            "overwrite": True,
+        },
     },
-    'fs_setup': [{'filesystem': DEFAULT_FS,
-                  'device': 'ephemeral0.1'}],
+    "fs_setup": [{"filesystem": DEFAULT_FS, "device": "ephemeral0.1"}],
 }
 
-DS_CFG_PATH = ['datasource', DS_NAME]
-DS_CFG_KEY_PRESERVE_NTFS = 'never_destroy_ntfs'
-DEF_EPHEMERAL_LABEL = 'Temporary Storage'
+DS_CFG_PATH = ["datasource", DS_NAME]
+DS_CFG_KEY_PRESERVE_NTFS = "never_destroy_ntfs"
+DEF_EPHEMERAL_LABEL = "Temporary Storage"
 
 # The redacted password fails to meet password complexity requirements
 # so we can safely use this to mask/redact the password in the ovf-env.xml
-DEF_PASSWD_REDACTION = 'REDACTED'
+DEF_PASSWD_REDACTION = "REDACTED"
 
 
 class DataSourceAzure(sources.DataSource):
 
-    dsname = 'Azure'
-    default_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-        EventType.BOOT,
-    }}
+    dsname = "Azure"
+    default_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+            EventType.BOOT,
+        }
+    }
     _negotiated = False
     _metadata_imds = sources.UNSET
     _ci_pkl_version = 1
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
-        self.seed_dir = os.path.join(paths.seed_dir, 'azure')
+        self.seed_dir = os.path.join(paths.seed_dir, "azure")
         self.cfg = {}
         self.seed = None
-        self.ds_cfg = util.mergemanydict([
-            util.get_cfg_by_path(sys_cfg, DS_CFG_PATH, {}),
-            BUILTIN_DS_CONFIG])
-        self.dhclient_lease_file = self.ds_cfg.get('dhclient_lease_file')
+        self.ds_cfg = util.mergemanydict(
+            [util.get_cfg_by_path(sys_cfg, DS_CFG_PATH, {}), BUILTIN_DS_CONFIG]
+        )
+        self.dhclient_lease_file = self.ds_cfg.get("dhclient_lease_file")
         self._network_config = None
         self._ephemeral_dhcp_ctx = None
         self.failed_desired_api_version = False
@@ -312,13 +313,13 @@ class DataSourceAzure(sources.DataSource):
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        if self.seed.startswith('/dev'):
-            subplatform_type = 'config-disk'
-        elif self.seed.lower() == 'imds':
-            subplatform_type = 'imds'
+        if self.seed.startswith("/dev"):
+            subplatform_type = "config-disk"
+        elif self.seed.lower() == "imds":
+            subplatform_type = "imds"
         else:
-            subplatform_type = 'seed-dir'
-        return '%s (%s)' % (subplatform_type, self.seed)
+            subplatform_type = "seed-dir"
+        return "%s (%s)" % (subplatform_type, self.seed)
 
     @azure_ds_telemetry_reporter
     def crawl_metadata(self):
@@ -332,7 +333,7 @@ class DataSourceAzure(sources.DataSource):
         # azure removes/ejects the cdrom containing the ovf-env.xml
         # file on reboot.  So, in order to successfully reboot we
         # need to look in the datadir and consider that valid
-        ddir = self.ds_cfg['data_dir']
+        ddir = self.ds_cfg["data_dir"]
 
         # The order in which the candidates are inserted matters here, because
         # it determines the value of ret. More specifically, the first one in
@@ -346,25 +347,28 @@ class DataSourceAzure(sources.DataSource):
         if os.path.isfile(REPROVISION_MARKER_FILE):
             reprovision = True
             metadata_source = "IMDS"
-            report_diagnostic_event("Reprovision marker file already present "
-                                    "before crawling Azure metadata: %s" %
-                                    REPROVISION_MARKER_FILE,
-                                    logger_func=LOG.debug)
+            report_diagnostic_event(
+                "Reprovision marker file already present "
+                "before crawling Azure metadata: %s" % REPROVISION_MARKER_FILE,
+                logger_func=LOG.debug,
+            )
         elif os.path.isfile(REPROVISION_NIC_ATTACH_MARKER_FILE):
             reprovision_after_nic_attach = True
             metadata_source = "NIC_ATTACH_MARKER_PRESENT"
-            report_diagnostic_event("Reprovision nic attach marker file "
-                                    "already present before crawling Azure "
-                                    "metadata: %s" %
-                                    REPROVISION_NIC_ATTACH_MARKER_FILE,
-                                    logger_func=LOG.debug)
+            report_diagnostic_event(
+                "Reprovision nic attach marker file "
+                "already present before crawling Azure "
+                "metadata: %s" % REPROVISION_NIC_ATTACH_MARKER_FILE,
+                logger_func=LOG.debug,
+            )
         else:
             for src in list_possible_azure_ds(self.seed_dir, ddir):
                 try:
                     if src.startswith("/dev/"):
                         if util.is_FreeBSD():
-                            ret = util.mount_cb(src, load_azure_ds_dir,
-                                                mtype="udf")
+                            ret = util.mount_cb(
+                                src, load_azure_ds_dir, mtype="udf"
+                            )
                         else:
                             ret = util.mount_cb(src, load_azure_ds_dir)
                         # save the device for ejection later
@@ -377,36 +381,33 @@ class DataSourceAzure(sources.DataSource):
                 except NonAzureDataSource:
                     report_diagnostic_event(
                         "Did not find Azure data source in %s" % src,
-                        logger_func=LOG.debug)
+                        logger_func=LOG.debug,
+                    )
                     continue
                 except util.MountFailedError:
                     report_diagnostic_event(
-                        '%s was not mountable' % src,
-                        logger_func=LOG.debug)
+                        "%s was not mountable" % src, logger_func=LOG.debug
+                    )
                     ovf_is_accessible = False
-                    empty_md = {'local-hostname': ''}
+                    empty_md = {"local-hostname": ""}
                     empty_cfg = dict(
-                        system_info=dict(
-                            default_user=dict(
-                                name=''
-                            )
-                        )
+                        system_info=dict(default_user=dict(name=""))
                     )
-                    ret = (empty_md, '', empty_cfg, {})
-                    metadata_source = 'IMDS'
+                    ret = (empty_md, "", empty_cfg, {})
+                    metadata_source = "IMDS"
                     continue
                 except BrokenAzureDataSource as exc:
-                    msg = 'BrokenAzureDataSource: %s' % exc
+                    msg = "BrokenAzureDataSource: %s" % exc
                     report_diagnostic_event(msg, logger_func=LOG.error)
                     raise sources.InvalidMetaDataException(msg)
 
         report_diagnostic_event(
             "Found provisioning metadata in %s" % metadata_source,
-            logger_func=LOG.debug)
+            logger_func=LOG.debug,
+        )
 
         imds_md = self.get_imds_data_with_api_fallback(
-            self.fallback_interface,
-            retries=10
+            self.fallback_interface, retries=10
         )
 
         # reset _fallback_interface so that if the code enters reprovisioning
@@ -414,16 +415,17 @@ class DataSourceAzure(sources.DataSource):
         self._fallback_interface = None
 
         if not imds_md and not ovf_is_accessible:
-            msg = 'No OVF or IMDS available'
+            msg = "No OVF or IMDS available"
             report_diagnostic_event(msg)
             raise sources.InvalidMetaDataException(msg)
 
-        perform_reprovision = (
-            reprovision or
-            self._should_reprovision(ret, imds_md))
+        perform_reprovision = reprovision or self._should_reprovision(
+            ret, imds_md
+        )
         perform_reprovision_after_nic_attach = (
-            reprovision_after_nic_attach or
-            self._should_reprovision_after_nic_attach(ret, imds_md))
+            reprovision_after_nic_attach
+            or self._should_reprovision_after_nic_attach(ret, imds_md)
+        )
 
         if perform_reprovision or perform_reprovision_after_nic_attach:
             if util.is_FreeBSD():
@@ -435,45 +437,50 @@ class DataSourceAzure(sources.DataSource):
             ret = self._reprovision()
             # fetch metadata again as it has changed after reprovisioning
             imds_md = self.get_imds_data_with_api_fallback(
-                self.fallback_interface,
-                retries=10
+                self.fallback_interface, retries=10
             )
 
         (md, userdata_raw, cfg, files) = ret
         self.seed = metadata_source
-        crawled_data.update({
-            'cfg': cfg,
-            'files': files,
-            'metadata': util.mergemanydict(
-                [md, {'imds': imds_md}]),
-            'userdata_raw': userdata_raw})
+        crawled_data.update(
+            {
+                "cfg": cfg,
+                "files": files,
+                "metadata": util.mergemanydict([md, {"imds": imds_md}]),
+                "userdata_raw": userdata_raw,
+            }
+        )
         imds_username = _username_from_imds(imds_md)
         imds_hostname = _hostname_from_imds(imds_md)
         imds_disable_password = _disable_password_from_imds(imds_md)
         if imds_username:
-            LOG.debug('Username retrieved from IMDS: %s', imds_username)
-            cfg['system_info']['default_user']['name'] = imds_username
+            LOG.debug("Username retrieved from IMDS: %s", imds_username)
+            cfg["system_info"]["default_user"]["name"] = imds_username
         if imds_hostname:
-            LOG.debug('Hostname retrieved from IMDS: %s', imds_hostname)
-            crawled_data['metadata']['local-hostname'] = imds_hostname
+            LOG.debug("Hostname retrieved from IMDS: %s", imds_hostname)
+            crawled_data["metadata"]["local-hostname"] = imds_hostname
         if imds_disable_password:
             LOG.debug(
-                'Disable password retrieved from IMDS: %s',
-                imds_disable_password
+                "Disable password retrieved from IMDS: %s",
+                imds_disable_password,
             )
-            crawled_data['metadata']['disable_password'] = imds_disable_password  # noqa: E501
+            crawled_data["metadata"][
+                "disable_password"
+            ] = imds_disable_password
 
-        if metadata_source == 'IMDS' and not crawled_data['files']:
+        if metadata_source == "IMDS" and not crawled_data["files"]:
             try:
                 contents = build_minimal_ovf(
                     username=imds_username,
                     hostname=imds_hostname,
-                    disableSshPwd=imds_disable_password)
-                crawled_data['files'] = {'ovf-env.xml': contents}
+                    disableSshPwd=imds_disable_password,
+                )
+                crawled_data["files"] = {"ovf-env.xml": contents}
             except Exception as e:
                 report_diagnostic_event(
                     "Failed to construct OVF from IMDS data %s" % e,
-                    logger_func=LOG.debug)
+                    logger_func=LOG.debug,
+                )
 
         # only use userdata from imds if OVF did not provide custom data
         # userdata provided by IMDS is always base64 encoded
@@ -482,48 +489,53 @@ class DataSourceAzure(sources.DataSource):
             if imds_userdata:
                 LOG.debug("Retrieved userdata from IMDS")
                 try:
-                    crawled_data['userdata_raw'] = base64.b64decode(
-                        ''.join(imds_userdata.split()))
+                    crawled_data["userdata_raw"] = base64.b64decode(
+                        "".join(imds_userdata.split())
+                    )
                 except Exception:
                     report_diagnostic_event(
-                        "Bad userdata in IMDS",
-                        logger_func=LOG.warning)
+                        "Bad userdata in IMDS", logger_func=LOG.warning
+                    )
 
         if not metadata_source:
-            msg = 'No Azure metadata found'
+            msg = "No Azure metadata found"
             report_diagnostic_event(msg, logger_func=LOG.error)
             raise sources.InvalidMetaDataException(msg)
         else:
             report_diagnostic_event(
-                'found datasource in %s' % metadata_source,
-                logger_func=LOG.debug)
+                "found datasource in %s" % metadata_source,
+                logger_func=LOG.debug,
+            )
 
         if metadata_source == ddir:
             report_diagnostic_event(
-                "using files cached in %s" % ddir, logger_func=LOG.debug)
+                "using files cached in %s" % ddir, logger_func=LOG.debug
+            )
 
         seed = _get_random_seed()
         if seed:
-            crawled_data['metadata']['random_seed'] = seed
-        crawled_data['metadata']['instance-id'] = self._iid()
+            crawled_data["metadata"]["random_seed"] = seed
+        crawled_data["metadata"]["instance-id"] = self._iid()
 
         if perform_reprovision or perform_reprovision_after_nic_attach:
             LOG.info("Reporting ready to Azure after getting ReprovisionData")
-            use_cached_ephemeral = (
-                self.distro.networking.is_up(self.fallback_interface) and
-                getattr(self, '_ephemeral_dhcp_ctx', None))
+            use_cached_ephemeral = self.distro.networking.is_up(
+                self.fallback_interface
+            ) and getattr(self, "_ephemeral_dhcp_ctx", None)
             if use_cached_ephemeral:
                 self._report_ready(lease=self._ephemeral_dhcp_ctx.lease)
                 self._ephemeral_dhcp_ctx.clean_network()  # Teardown ephemeral
             else:
                 try:
                     with EphemeralDHCPv4WithReporting(
-                            azure_ds_reporter) as lease:
+                        azure_ds_reporter
+                    ) as lease:
                         self._report_ready(lease=lease)
                 except Exception as e:
                     report_diagnostic_event(
                         "exception while reporting ready: %s" % e,
-                        logger_func=LOG.error)
+                        logger_func=LOG.error,
+                    )
                     raise
         return crawled_data
 
@@ -559,19 +571,24 @@ class DataSourceAzure(sources.DataSource):
 
         try:
             crawled_data = util.log_time(
-                logfunc=LOG.debug, msg='Crawl of metadata service',
-                func=self.crawl_metadata
+                logfunc=LOG.debug,
+                msg="Crawl of metadata service",
+                func=self.crawl_metadata,
             )
         except Exception as e:
             report_diagnostic_event(
-                'Could not crawl Azure metadata: %s' % e,
-                logger_func=LOG.error)
+                "Could not crawl Azure metadata: %s" % e, logger_func=LOG.error
+            )
             self._report_failure(
-                description=DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE)
+                description=DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE
+            )
             return False
 
-        if (self.distro and self.distro.name == 'ubuntu' and
-                self.ds_cfg.get('apply_network_config')):
+        if (
+            self.distro
+            and self.distro.name == "ubuntu"
+            and self.ds_cfg.get("apply_network_config")
+        ):
             maybe_remove_ubuntu_network_config_scripts()
 
         # Process crawled data and augment with various config defaults
@@ -584,21 +601,25 @@ class DataSourceAzure(sources.DataSource):
                 "Ephemeral resource disk '%s' exists. "
                 "Merging default Azure cloud ephemeral disk configs."
                 % devpath,
-                logger_func=LOG.debug)
+                logger_func=LOG.debug,
+            )
             self.cfg = util.mergemanydict(
-                [crawled_data['cfg'], BUILTIN_CLOUD_EPHEMERAL_DISK_CONFIG])
+                [crawled_data["cfg"], BUILTIN_CLOUD_EPHEMERAL_DISK_CONFIG]
+            )
         else:
             report_diagnostic_event(
                 "Ephemeral resource disk '%s' does not exist. "
                 "Not merging default Azure cloud ephemeral disk configs."
                 % devpath,
-                logger_func=LOG.debug)
-            self.cfg = crawled_data['cfg']
+                logger_func=LOG.debug,
+            )
+            self.cfg = crawled_data["cfg"]
 
-        self._metadata_imds = crawled_data['metadata']['imds']
+        self._metadata_imds = crawled_data["metadata"]["imds"]
         self.metadata = util.mergemanydict(
-            [crawled_data['metadata'], DEFAULT_METADATA])
-        self.userdata_raw = crawled_data['userdata_raw']
+            [crawled_data["metadata"], DEFAULT_METADATA]
+        )
+        self.userdata_raw = crawled_data["userdata_raw"]
 
         user_ds_cfg = util.get_cfg_by_path(self.cfg, DS_CFG_PATH, {})
         self.ds_cfg = util.mergemanydict([user_ds_cfg, self.ds_cfg])
@@ -606,17 +627,19 @@ class DataSourceAzure(sources.DataSource):
         # walinux agent writes files world readable, but expects
         # the directory to be protected.
         write_files(
-            self.ds_cfg['data_dir'], crawled_data['files'], dirmode=0o700)
+            self.ds_cfg["data_dir"], crawled_data["files"], dirmode=0o700
+        )
         return True
 
     @azure_ds_telemetry_reporter
     def get_imds_data_with_api_fallback(
-            self,
-            fallback_nic,
-            retries,
-            md_type=metadata_type.all,
-            exc_cb=retry_on_url_exc,
-            infinite=False):
+        self,
+        fallback_nic,
+        retries,
+        md_type=metadata_type.all,
+        exc_cb=retry_on_url_exc,
+        infinite=False,
+    ):
         """
         Wrapper for get_metadata_from_imds so that we can have flexibility
         in which IMDS api-version we use. If a particular instance of IMDS
@@ -628,30 +651,23 @@ class DataSourceAzure(sources.DataSource):
         if not self.failed_desired_api_version:
             for _ in range(retries):
                 try:
-                    LOG.info(
-                        "Attempting IMDS api-version: %s",
-                        IMDS_VER_WANT
-                    )
+                    LOG.info("Attempting IMDS api-version: %s", IMDS_VER_WANT)
                     return get_metadata_from_imds(
                         fallback_nic=fallback_nic,
                         retries=0,
                         md_type=md_type,
                         api_version=IMDS_VER_WANT,
-                        exc_cb=exc_cb
+                        exc_cb=exc_cb,
                     )
                 except UrlError as err:
                     LOG.info(
-                        "UrlError with IMDS api-version: %s",
-                        IMDS_VER_WANT
+                        "UrlError with IMDS api-version: %s", IMDS_VER_WANT
                     )
                     if err.code == 400:
                         log_msg = "Fall back to IMDS api-version: {}".format(
                             IMDS_VER_MIN
                         )
-                        report_diagnostic_event(
-                            log_msg,
-                            logger_func=LOG.info
-                        )
+                        report_diagnostic_event(log_msg, logger_func=LOG.info)
                         self.failed_desired_api_version = True
                         break
 
@@ -662,11 +678,11 @@ class DataSourceAzure(sources.DataSource):
             md_type=md_type,
             api_version=IMDS_VER_MIN,
             exc_cb=exc_cb,
-            infinite=infinite
+            infinite=infinite,
         )
 
     def device_name_to_device(self, name):
-        return self.ds_cfg['disk_aliases'].get(name)
+        return self.ds_cfg["disk_aliases"].get(name)
 
     @azure_ds_telemetry_reporter
     def get_public_ssh_keys(self):
@@ -687,15 +703,16 @@ class DataSourceAzure(sources.DataSource):
         OVF as a second option for environments that don't have IMDS.
         """
 
-        LOG.debug('Retrieving public SSH keys')
+        LOG.debug("Retrieving public SSH keys")
         ssh_keys = []
         keys_from_imds = True
-        LOG.debug('Attempting to get SSH keys from IMDS')
+        LOG.debug("Attempting to get SSH keys from IMDS")
         try:
             ssh_keys = [
-                public_key['keyData']
-                for public_key
-                in self.metadata['imds']['compute']['publicKeys']
+                public_key["keyData"]
+                for public_key in self.metadata["imds"]["compute"][
+                    "publicKeys"
+                ]
             ]
             for key in ssh_keys:
                 if not _key_is_openssh_formatted(key=key):
@@ -703,33 +720,28 @@ class DataSourceAzure(sources.DataSource):
                     break
 
             if not keys_from_imds:
-                log_msg = 'Keys not in OpenSSH format, using OVF'
+                log_msg = "Keys not in OpenSSH format, using OVF"
             else:
-                log_msg = 'Retrieved {} keys from IMDS'.format(
-                    len(ssh_keys)
-                    if ssh_keys is not None
-                    else 0
+                log_msg = "Retrieved {} keys from IMDS".format(
+                    len(ssh_keys) if ssh_keys is not None else 0
                 )
         except KeyError:
-            log_msg = 'Unable to get keys from IMDS, falling back to OVF'
+            log_msg = "Unable to get keys from IMDS, falling back to OVF"
             keys_from_imds = False
         finally:
             report_diagnostic_event(log_msg, logger_func=LOG.debug)
 
         if not keys_from_imds:
-            LOG.debug('Attempting to get SSH keys from OVF')
+            LOG.debug("Attempting to get SSH keys from OVF")
             try:
-                ssh_keys = self.metadata['public-keys']
-                log_msg = 'Retrieved {} keys from OVF'.format(len(ssh_keys))
+                ssh_keys = self.metadata["public-keys"]
+                log_msg = "Retrieved {} keys from OVF".format(len(ssh_keys))
             except KeyError:
-                log_msg = 'No keys available from OVF'
+                log_msg = "No keys available from OVF"
             finally:
                 report_diagnostic_event(log_msg, logger_func=LOG.debug)
 
-        return SSHKeys(
-            keys_from_imds=keys_from_imds,
-            ssh_keys=ssh_keys
-        )
+        return SSHKeys(keys_from_imds=keys_from_imds, ssh_keys=ssh_keys)
 
     def get_config_obj(self):
         return self.cfg
@@ -740,12 +752,13 @@ class DataSourceAzure(sources.DataSource):
 
     def _iid(self, previous=None):
         prev_iid_path = os.path.join(
-            self.paths.get_cpath('data'), 'instance-id')
+            self.paths.get_cpath("data"), "instance-id"
+        )
         # Older kernels than 4.15 will have UPPERCASE product_uuid.
         # We don't want Azure to react to an UPPER/lower difference as a new
         # instance id as it rewrites SSH host keys.
         # LP: #1835584
-        iid = dmi.read_dmi_data('system-uuid').lower()
+        iid = dmi.read_dmi_data("system-uuid").lower()
         if os.path.exists(prev_iid_path):
             previous = util.load_file(prev_iid_path).strip()
             if previous.lower() == iid:
@@ -759,22 +772,26 @@ class DataSourceAzure(sources.DataSource):
     @azure_ds_telemetry_reporter
     def setup(self, is_new_instance):
         if self._negotiated is False:
-            LOG.debug("negotiating for %s (new_instance=%s)",
-                      self.get_instance_id(), is_new_instance)
+            LOG.debug(
+                "negotiating for %s (new_instance=%s)",
+                self.get_instance_id(),
+                is_new_instance,
+            )
             fabric_data = self._negotiate()
             LOG.debug("negotiating returned %s", fabric_data)
             if fabric_data:
                 self.metadata.update(fabric_data)
             self._negotiated = True
         else:
-            LOG.debug("negotiating already done for %s",
-                      self.get_instance_id())
+            LOG.debug(
+                "negotiating already done for %s", self.get_instance_id()
+            )
 
     @azure_ds_telemetry_reporter
     def _wait_for_nic_detach(self, nl_sock):
         """Use the netlink socket provided to wait for nic detach event.
-           NOTE: The function doesn't close the socket. The caller owns closing
-           the socket and disposing it safely.
+        NOTE: The function doesn't close the socket. The caller owns closing
+        the socket and disposing it safely.
         """
         try:
             ifname = None
@@ -782,21 +799,27 @@ class DataSourceAzure(sources.DataSource):
             # Preprovisioned VM will only have one NIC, and it gets
             # detached immediately after deployment.
             with events.ReportEventStack(
-                    name="wait-for-nic-detach",
-                    description=("wait for nic detach"),
-                    parent=azure_ds_reporter):
+                name="wait-for-nic-detach",
+                description="wait for nic detach",
+                parent=azure_ds_reporter,
+            ):
                 ifname = netlink.wait_for_nic_detach_event(nl_sock)
             if ifname is None:
-                msg = ("Preprovisioned nic not detached as expected. "
-                       "Proceeding without failing.")
+                msg = (
+                    "Preprovisioned nic not detached as expected. "
+                    "Proceeding without failing."
+                )
                 report_diagnostic_event(msg, logger_func=LOG.warning)
             else:
-                report_diagnostic_event("The preprovisioned nic %s is detached"
-                                        % ifname, logger_func=LOG.warning)
+                report_diagnostic_event(
+                    "The preprovisioned nic %s is detached" % ifname,
+                    logger_func=LOG.warning,
+                )
             path = REPROVISION_NIC_DETACHED_MARKER_FILE
             LOG.info("Creating a marker file for nic detached: %s", path)
-            util.write_file(path, "{pid}: {time}\n".format(
-                pid=os.getpid(), time=time()))
+            util.write_file(
+                path, "{pid}: {time}\n".format(pid=os.getpid(), time=time())
+            )
         except AssertionError as error:
             report_diagnostic_event(error, logger_func=LOG.error)
             raise
@@ -804,14 +827,15 @@ class DataSourceAzure(sources.DataSource):
     @azure_ds_telemetry_reporter
     def wait_for_link_up(self, ifname):
         """In cases where the link state is still showing down after a nic is
-           hot-attached, we can attempt to bring it up by forcing the hv_netvsc
-           drivers to query the link state by unbinding and then binding the
-           device. This function attempts infinitely until the link is up,
-           because we cannot proceed further until we have a stable link."""
+        hot-attached, we can attempt to bring it up by forcing the hv_netvsc
+        drivers to query the link state by unbinding and then binding the
+        device. This function attempts infinitely until the link is up,
+        because we cannot proceed further until we have a stable link."""
 
         if self.distro.networking.try_set_link_up(ifname):
-            report_diagnostic_event("The link %s is already up." % ifname,
-                                    logger_func=LOG.info)
+            report_diagnostic_event(
+                "The link %s is already up." % ifname, logger_func=LOG.info
+            )
             return
 
         LOG.debug("Attempting to bring %s up", ifname)
@@ -820,22 +844,27 @@ class DataSourceAzure(sources.DataSource):
         LOG.info("Unbinding and binding the interface %s", ifname)
         while True:
 
-            devicename = net.read_sys_net(ifname,
-                                          'device/device_id').strip('{}')
-            util.write_file('/sys/bus/vmbus/drivers/hv_netvsc/unbind',
-                            devicename)
-            util.write_file('/sys/bus/vmbus/drivers/hv_netvsc/bind',
-                            devicename)
+            devicename = net.read_sys_net(ifname, "device/device_id").strip(
+                "{}"
+            )
+            util.write_file(
+                "/sys/bus/vmbus/drivers/hv_netvsc/unbind", devicename
+            )
+            util.write_file(
+                "/sys/bus/vmbus/drivers/hv_netvsc/bind", devicename
+            )
 
             attempts = attempts + 1
             if self.distro.networking.try_set_link_up(ifname):
-                msg = "The link %s is up after %s attempts" % (ifname,
-                                                               attempts)
+                msg = "The link %s is up after %s attempts" % (
+                    ifname,
+                    attempts,
+                )
                 report_diagnostic_event(msg, logger_func=LOG.info)
                 return
 
             if attempts % 10 == 0:
-                msg = ("Link is not up after %d attempts to rebind" % attempts)
+                msg = "Link is not up after %d attempts to rebind" % attempts
                 report_diagnostic_event(msg, logger_func=LOG.info)
                 LOG.info(msg)
 
@@ -844,13 +873,17 @@ class DataSourceAzure(sources.DataSource):
             # again.
             sleep_duration = 0.5
             max_status_polls = 20
-            LOG.debug("Polling %d seconds for primary NIC link up after "
-                      "rebind.", sleep_duration * max_status_polls)
+            LOG.debug(
+                "Polling %d seconds for primary NIC link up after rebind.",
+                sleep_duration * max_status_polls,
+            )
 
             for i in range(0, max_status_polls):
                 if self.distro.networking.is_up(ifname):
-                    msg = ("After %d attempts to rebind, link is up after "
-                           "polling the link status %d times" % (attempts, i))
+                    msg = (
+                        "After %d attempts to rebind, link is up after "
+                        "polling the link status %d times" % (attempts, i)
+                    )
                     report_diagnostic_event(msg, logger_func=LOG.info)
                     LOG.debug(msg)
                     return
@@ -860,40 +893,47 @@ class DataSourceAzure(sources.DataSource):
     @azure_ds_telemetry_reporter
     def _create_report_ready_marker(self):
         path = REPORTED_READY_MARKER_FILE
-        LOG.info(
-            "Creating a marker file to report ready: %s", path)
-        util.write_file(path, "{pid}: {time}\n".format(
-            pid=os.getpid(), time=time()))
+        LOG.info("Creating a marker file to report ready: %s", path)
+        util.write_file(
+            path, "{pid}: {time}\n".format(pid=os.getpid(), time=time())
+        )
         report_diagnostic_event(
-            'Successfully created reported ready marker file '
-            'while in the preprovisioning pool.',
-            logger_func=LOG.debug)
+            "Successfully created reported ready marker file "
+            "while in the preprovisioning pool.",
+            logger_func=LOG.debug,
+        )
 
     @azure_ds_telemetry_reporter
     def _report_ready_if_needed(self):
         """Report ready to the platform if the marker file is not present,
         and create the marker file.
         """
-        have_not_reported_ready = (
-            not os.path.isfile(REPORTED_READY_MARKER_FILE))
+        have_not_reported_ready = not os.path.isfile(
+            REPORTED_READY_MARKER_FILE
+        )
 
         if have_not_reported_ready:
-            report_diagnostic_event("Reporting ready before nic detach",
-                                    logger_func=LOG.info)
+            report_diagnostic_event(
+                "Reporting ready before nic detach", logger_func=LOG.info
+            )
             try:
                 with EphemeralDHCPv4WithReporting(azure_ds_reporter) as lease:
                     self._report_ready(lease=lease)
             except Exception as e:
-                report_diagnostic_event("Exception reporting ready during "
-                                        "preprovisioning before nic detach: %s"
-                                        % e, logger_func=LOG.error)
+                report_diagnostic_event(
+                    "Exception reporting ready during "
+                    "preprovisioning before nic detach: %s" % e,
+                    logger_func=LOG.error,
+                )
                 raise
             self._create_report_ready_marker()
         else:
-            report_diagnostic_event("Already reported ready before nic detach."
-                                    " The marker file already exists: %s" %
-                                    REPORTED_READY_MARKER_FILE,
-                                    logger_func=LOG.error)
+            report_diagnostic_event(
+                "Already reported ready before nic detach."
+                " The marker file already exists: %s"
+                % REPORTED_READY_MARKER_FILE,
+                logger_func=LOG.error,
+            )
 
     @azure_ds_telemetry_reporter
     def _check_if_nic_is_primary(self, ifname):
@@ -915,20 +955,26 @@ class DataSourceAzure(sources.DataSource):
         # the primary NIC.
         try:
             with events.ReportEventStack(
-                    name="obtain-dhcp-lease",
-                    description=("obtain dhcp lease for %s when attempting to "
-                                 "determine primary NIC during reprovision of "
-                                 "a pre-provisioned VM" % ifname),
-                    parent=azure_ds_reporter):
+                name="obtain-dhcp-lease",
+                description=(
+                    "obtain dhcp lease for %s when attempting to "
+                    "determine primary NIC during reprovision of "
+                    "a pre-provisioned VM"
+                )
+                % ifname,
+                parent=azure_ds_reporter,
+            ):
                 dhcp_ctx = EphemeralDHCPv4(
-                    iface=ifname,
-                    dhcp_log_func=dhcp_log_cb)
+                    iface=ifname, dhcp_log_func=dhcp_log_cb
+                )
                 dhcp_ctx.obtain_lease()
         except Exception as e:
-            report_diagnostic_event("Giving up. Failed to obtain dhcp lease "
-                                    "for %s when attempting to determine "
-                                    "primary NIC during reprovision due to %s"
-                                    % (ifname, e), logger_func=LOG.error)
+            report_diagnostic_event(
+                "Giving up. Failed to obtain dhcp lease "
+                "for %s when attempting to determine "
+                "primary NIC during reprovision due to %s" % (ifname, e),
+                logger_func=LOG.error,
+            )
             raise
 
         # Retry polling network metadata for a limited duration only when the
@@ -953,13 +999,15 @@ class DataSourceAzure(sources.DataSource):
                 report_diagnostic_event(
                     "Ran into exception when attempting to reach %s "
                     "after %d polls." % (msg, metadata_poll_count),
-                    logger_func=LOG.error)
+                    logger_func=LOG.error,
+                )
 
                 if isinstance(exc, UrlError):
-                    report_diagnostic_event("poll IMDS with %s failed. "
-                                            "Exception: %s and code: %s" %
-                                            (msg, exc.cause, exc.code),
-                                            logger_func=LOG.error)
+                    report_diagnostic_event(
+                        "poll IMDS with %s failed. Exception: %s and code: %s"
+                        % (msg, exc.cause, exc.code),
+                        logger_func=LOG.error,
+                    )
 
             # Retry up to a certain limit for both timeout and network
             # unreachable errors.
@@ -967,7 +1015,7 @@ class DataSourceAzure(sources.DataSource):
                 exc.cause, (requests.Timeout, requests.ConnectionError)
             ):
                 expected_errors_count = expected_errors_count + 1
-                return (expected_errors_count <= 10)
+                return expected_errors_count <= 10
             return True
 
         # Primary nic detection will be optimized in the future. The fact that
@@ -975,17 +1023,16 @@ class DataSourceAzure(sources.DataSource):
         # could add several seconds of delay.
         try:
             imds_md = self.get_imds_data_with_api_fallback(
-                ifname,
-                0,
-                metadata_type.network,
-                network_metadata_exc_cb,
-                True
+                ifname, 0, metadata_type.network, network_metadata_exc_cb, True
             )
         except Exception as e:
             LOG.warning(
                 "Failed to get network metadata using nic %s. Attempt to "
                 "contact IMDS failed with error %s. Assuming this is not the "
-                "primary nic.", ifname, e)
+                "primary nic.",
+                ifname,
+                e,
+            )
         finally:
             # If we are not the primary nic, then clean the dhcp context.
             if imds_md is None:
@@ -1000,10 +1047,11 @@ class DataSourceAzure(sources.DataSource):
             self._ephemeral_dhcp_ctx = dhcp_ctx
 
             # Set the expected nic count based on the response received.
-            expected_nic_count = len(
-                imds_md['interface'])
-            report_diagnostic_event("Expected nic count: %d" %
-                                    expected_nic_count, logger_func=LOG.info)
+            expected_nic_count = len(imds_md["interface"])
+            report_diagnostic_event(
+                "Expected nic count: %d" % expected_nic_count,
+                logger_func=LOG.info,
+            )
 
         return is_primary, expected_nic_count
 
@@ -1028,17 +1076,22 @@ class DataSourceAzure(sources.DataSource):
             while True:
                 ifname = None
                 with events.ReportEventStack(
-                        name="wait-for-nic-attach",
-                        description=("wait for nic attach after %d nics have "
-                                     "been attached" % len(nics_found)),
-                        parent=azure_ds_reporter):
-                    ifname = netlink.wait_for_nic_attach_event(nl_sock,
-                                                               nics_found)
+                    name="wait-for-nic-attach",
+                    description=(
+                        "wait for nic attach after %d nics have been attached"
+                        % len(nics_found)
+                    ),
+                    parent=azure_ds_reporter,
+                ):
+                    ifname = netlink.wait_for_nic_attach_event(
+                        nl_sock, nics_found
+                    )
 
                 # wait_for_nic_attach_event guarantees that ifname it not None
                 nics_found.append(ifname)
-                report_diagnostic_event("Detected nic %s attached." % ifname,
-                                        logger_func=LOG.info)
+                report_diagnostic_event(
+                    "Detected nic %s attached." % ifname, logger_func=LOG.info
+                )
 
                 # Attempt to bring the interface's operating state to
                 # UP in case it is not already.
@@ -1048,14 +1101,17 @@ class DataSourceAzure(sources.DataSource):
                 # platform will attach the primary nic first so we
                 # won't be in primary_nic_found = false state for long.
                 if not primary_nic_found:
-                    LOG.info("Checking if %s is the primary nic",
-                             ifname)
-                    (primary_nic_found, expected_nic_count) = (
-                        self._check_if_nic_is_primary(ifname))
+                    LOG.info("Checking if %s is the primary nic", ifname)
+                    (
+                        primary_nic_found,
+                        expected_nic_count,
+                    ) = self._check_if_nic_is_primary(ifname)
 
                 # Exit criteria: check if we've discovered all nics
-                if (expected_nic_count != -1
-                        and len(nics_found) >= expected_nic_count):
+                if (
+                    expected_nic_count != -1
+                    and len(nics_found) >= expected_nic_count
+                ):
                     LOG.info("Found all the nics for this VM.")
                     break
 
@@ -1065,9 +1121,9 @@ class DataSourceAzure(sources.DataSource):
     @azure_ds_telemetry_reporter
     def _wait_for_all_nics_ready(self):
         """Wait for nic(s) to be hot-attached. There may be multiple nics
-           depending on the customer request.
-           But only primary nic would be able to communicate with wireserver
-           and IMDS. So we detect and save the primary nic to be used later.
+        depending on the customer request.
+        But only primary nic would be able to communicate with wireserver
+        and IMDS. So we detect and save the primary nic to be used later.
         """
 
         nl_sock = None
@@ -1075,7 +1131,8 @@ class DataSourceAzure(sources.DataSource):
             nl_sock = netlink.create_bound_netlink_socket()
 
             report_ready_marker_present = bool(
-                os.path.isfile(REPORTED_READY_MARKER_FILE))
+                os.path.isfile(REPORTED_READY_MARKER_FILE)
+            )
 
             # Report ready if the marker file is not already present.
             # The nic of the preprovisioned vm gets hot-detached as soon as
@@ -1083,7 +1140,8 @@ class DataSourceAzure(sources.DataSource):
             self._report_ready_if_needed()
 
             has_nic_been_detached = bool(
-                os.path.isfile(REPROVISION_NIC_DETACHED_MARKER_FILE))
+                os.path.isfile(REPROVISION_NIC_DETACHED_MARKER_FILE)
+            )
 
             if not has_nic_been_detached:
                 LOG.info("NIC has not been detached yet.")
@@ -1097,12 +1155,14 @@ class DataSourceAzure(sources.DataSource):
             if not self.fallback_interface:
                 self._wait_for_hot_attached_nics(nl_sock)
             else:
-                report_diagnostic_event("Skipping waiting for nic attach "
-                                        "because we already have a fallback "
-                                        "interface. Report Ready marker "
-                                        "present before detaching nics: %s" %
-                                        report_ready_marker_present,
-                                        logger_func=LOG.info)
+                report_diagnostic_event(
+                    "Skipping waiting for nic attach "
+                    "because we already have a fallback "
+                    "interface. Report Ready marker "
+                    "present before detaching nics: %s"
+                    % report_ready_marker_present,
+                    logger_func=LOG.info,
+                )
         except netlink.NetlinkCreateSocketError as e:
             report_diagnostic_event(e, logger_func=LOG.warning)
             raise
@@ -1115,8 +1175,7 @@ class DataSourceAzure(sources.DataSource):
         """Poll IMDS for the new provisioning data until we get a valid
         response. Then return the returned JSON object."""
         url = "{}?api-version={}".format(
-            metadata_type.reprovisiondata.value,
-            IMDS_VER_MIN
+            metadata_type.reprovisiondata.value, IMDS_VER_MIN
         )
         headers = {"Metadata": "true"}
         nl_sock = None
@@ -1133,38 +1192,44 @@ class DataSourceAzure(sources.DataSource):
                     if self.imds_poll_counter == self.imds_logging_threshold:
                         # Reducing the logging frequency as we are polling IMDS
                         self.imds_logging_threshold *= 2
-                        LOG.debug("Backing off logging threshold for the same "
-                                  "exception to %d",
-                                  self.imds_logging_threshold)
-                        report_diagnostic_event("poll IMDS with %s failed. "
-                                                "Exception: %s and code: %s" %
-                                                (msg, exception.cause,
-                                                 exception.code),
-                                                logger_func=LOG.debug)
+                        LOG.debug(
+                            "Backing off logging threshold for the same "
+                            "exception to %d",
+                            self.imds_logging_threshold,
+                        )
+                        report_diagnostic_event(
+                            "poll IMDS with %s failed. "
+                            "Exception: %s and code: %s"
+                            % (msg, exception.cause, exception.code),
+                            logger_func=LOG.debug,
+                        )
                     self.imds_poll_counter += 1
                     return True
                 else:
                     # If we get an exception while trying to call IMDS, we call
                     # DHCP and setup the ephemeral network to acquire a new IP.
-                    report_diagnostic_event("poll IMDS with %s failed. "
-                                            "Exception: %s and code: %s" %
-                                            (msg, exception.cause,
-                                             exception.code),
-                                            logger_func=LOG.warning)
+                    report_diagnostic_event(
+                        "poll IMDS with %s failed. Exception: %s and code: %s"
+                        % (msg, exception.cause, exception.code),
+                        logger_func=LOG.warning,
+                    )
                     return False
 
             report_diagnostic_event(
-                "poll IMDS failed with an "
-                "unexpected exception: %s" % exception,
-                logger_func=LOG.warning)
+                "poll IMDS failed with an unexpected exception: %s"
+                % exception,
+                logger_func=LOG.warning,
+            )
             return False
 
         # When the interface is hot-attached, we would have already
         # done dhcp and set the dhcp context. In that case, skip
         # the attempt to do dhcp.
         is_ephemeral_ctx_present = self._ephemeral_dhcp_ctx is not None
-        msg = ("Unexpected error. Dhcp context is not expected to be already "
-               "set when we need to wait for vnet switch")
+        msg = (
+            "Unexpected error. Dhcp context is not expected to be already "
+            "set when we need to wait for vnet switch"
+        )
         if is_ephemeral_ctx_present and report_ready:
             report_diagnostic_event(msg, logger_func=LOG.error)
             raise RuntimeError(msg)
@@ -1178,11 +1243,13 @@ class DataSourceAzure(sources.DataSource):
                     # Save our EphemeralDHCPv4 context to avoid repeated dhcp
                     # later when we report ready
                     with events.ReportEventStack(
-                            name="obtain-dhcp-lease",
-                            description="obtain dhcp lease",
-                            parent=azure_ds_reporter):
+                        name="obtain-dhcp-lease",
+                        description="obtain dhcp lease",
+                        parent=azure_ds_reporter,
+                    ):
                         self._ephemeral_dhcp_ctx = EphemeralDHCPv4(
-                            dhcp_log_func=dhcp_log_cb)
+                            dhcp_log_func=dhcp_log_cb
+                        )
                         lease = self._ephemeral_dhcp_ctx.obtain_lease()
 
                 if vnet_switched:
@@ -1192,15 +1259,18 @@ class DataSourceAzure(sources.DataSource):
                         nl_sock = netlink.create_bound_netlink_socket()
                     except netlink.NetlinkCreateSocketError as e:
                         report_diagnostic_event(
-                            'Failed to create bound netlink socket: %s' % e,
-                            logger_func=LOG.warning)
+                            "Failed to create bound netlink socket: %s" % e,
+                            logger_func=LOG.warning,
+                        )
                         self._ephemeral_dhcp_ctx.clean_network()
                         break
 
                     report_ready_succeeded = self._report_ready(lease=lease)
                     if not report_ready_succeeded:
-                        msg = ('Failed reporting ready while in '
-                               'the preprovisioning pool.')
+                        msg = (
+                            "Failed reporting ready while in "
+                            "the preprovisioning pool."
+                        )
                         report_diagnostic_event(msg, logger_func=LOG.error)
                         self._ephemeral_dhcp_ctx.clean_network()
                         raise sources.InvalidMetaDataException(msg)
@@ -1210,31 +1280,37 @@ class DataSourceAzure(sources.DataSource):
 
                     LOG.debug("Wait for vnetswitch to happen")
                     with events.ReportEventStack(
-                            name="wait-for-media-disconnect-connect",
-                            description="wait for vnet switch",
-                            parent=azure_ds_reporter):
+                        name="wait-for-media-disconnect-connect",
+                        description="wait for vnet switch",
+                        parent=azure_ds_reporter,
+                    ):
                         try:
                             netlink.wait_for_media_disconnect_connect(
-                                nl_sock, lease['interface'])
+                                nl_sock, lease["interface"]
+                            )
                         except AssertionError as e:
                             report_diagnostic_event(
-                                'Error while waiting for vnet switch: %s' % e,
-                                logger_func=LOG.error)
+                                "Error while waiting for vnet switch: %s" % e,
+                                logger_func=LOG.error,
+                            )
                             break
 
                     vnet_switched = True
                     self._ephemeral_dhcp_ctx.clean_network()
                 else:
                     with events.ReportEventStack(
-                            name="get-reprovision-data-from-imds",
-                            description="get reprovision data from imds",
-                            parent=azure_ds_reporter):
-                        return_val = readurl(url,
-                                             timeout=IMDS_TIMEOUT_IN_SECONDS,
-                                             headers=headers,
-                                             exception_cb=exc_cb,
-                                             infinite=True,
-                                             log_req_resp=False).contents
+                        name="get-reprovision-data-from-imds",
+                        description="get reprovision data from imds",
+                        parent=azure_ds_reporter,
+                    ):
+                        return_val = readurl(
+                            url,
+                            timeout=IMDS_TIMEOUT_IN_SECONDS,
+                            headers=headers,
+                            exception_cb=exc_cb,
+                            infinite=True,
+                            log_req_resp=False,
+                        ).contents
                     break
             except UrlError:
                 # Teardown our EphemeralDHCPv4 context on failure as we retry
@@ -1248,12 +1324,14 @@ class DataSourceAzure(sources.DataSource):
                     nl_sock.close()
 
         if vnet_switched:
-            report_diagnostic_event("attempted dhcp %d times after reuse" %
-                                    dhcp_attempts,
-                                    logger_func=LOG.debug)
-            report_diagnostic_event("polled imds %d times after reuse" %
-                                    self.imds_poll_counter,
-                                    logger_func=LOG.debug)
+            report_diagnostic_event(
+                "attempted dhcp %d times after reuse" % dhcp_attempts,
+                logger_func=LOG.debug,
+            )
+            report_diagnostic_event(
+                "polled imds %d times after reuse" % self.imds_poll_counter,
+                logger_func=LOG.debug,
+            )
 
         return return_val
 
@@ -1264,52 +1342,63 @@ class DataSourceAzure(sources.DataSource):
         @param description: A description of the error encountered.
         @return: The success status of sending the failure signal.
         """
-        unknown_245_key = 'unknown-245'
+        unknown_245_key = "unknown-245"
 
         try:
-            if (self.distro.networking.is_up(self.fallback_interface) and
-                    getattr(self, '_ephemeral_dhcp_ctx', None) and
-                    getattr(self._ephemeral_dhcp_ctx, 'lease', None) and
-                    unknown_245_key in self._ephemeral_dhcp_ctx.lease):
+            if (
+                self.distro.networking.is_up(self.fallback_interface)
+                and getattr(self, "_ephemeral_dhcp_ctx", None)
+                and getattr(self._ephemeral_dhcp_ctx, "lease", None)
+                and unknown_245_key in self._ephemeral_dhcp_ctx.lease
+            ):
                 report_diagnostic_event(
-                    'Using cached ephemeral dhcp context '
-                    'to report failure to Azure', logger_func=LOG.debug)
+                    "Using cached ephemeral dhcp context "
+                    "to report failure to Azure",
+                    logger_func=LOG.debug,
+                )
                 report_failure_to_fabric(
                     dhcp_opts=self._ephemeral_dhcp_ctx.lease[unknown_245_key],
-                    description=description)
+                    description=description,
+                )
                 self._ephemeral_dhcp_ctx.clean_network()  # Teardown ephemeral
                 return True
         except Exception as e:
             report_diagnostic_event(
-                'Failed to report failure using '
-                'cached ephemeral dhcp context: %s' % e,
-                logger_func=LOG.error)
+                "Failed to report failure using "
+                "cached ephemeral dhcp context: %s" % e,
+                logger_func=LOG.error,
+            )
 
         try:
             report_diagnostic_event(
-                'Using new ephemeral dhcp to report failure to Azure',
-                logger_func=LOG.debug)
+                "Using new ephemeral dhcp to report failure to Azure",
+                logger_func=LOG.debug,
+            )
             with EphemeralDHCPv4WithReporting(azure_ds_reporter) as lease:
                 report_failure_to_fabric(
-                    dhcp_opts=lease[unknown_245_key],
-                    description=description)
+                    dhcp_opts=lease[unknown_245_key], description=description
+                )
             return True
         except Exception as e:
             report_diagnostic_event(
-                'Failed to report failure using new ephemeral dhcp: %s' % e,
-                logger_func=LOG.debug)
+                "Failed to report failure using new ephemeral dhcp: %s" % e,
+                logger_func=LOG.debug,
+            )
 
         try:
             report_diagnostic_event(
-                'Using fallback lease to report failure to Azure')
+                "Using fallback lease to report failure to Azure"
+            )
             report_failure_to_fabric(
                 fallback_lease_file=self.dhclient_lease_file,
-                description=description)
+                description=description,
+            )
             return True
         except Exception as e:
             report_diagnostic_event(
-                'Failed to report failure using fallback lease: %s' % e,
-                logger_func=LOG.debug)
+                "Failed to report failure using fallback lease: %s" % e,
+                logger_func=LOG.debug,
+            )
 
         return False
 
@@ -1320,27 +1409,33 @@ class DataSourceAzure(sources.DataSource):
         @return: The success status of sending the ready signal.
         """
         try:
-            get_metadata_from_fabric(fallback_lease_file=None,
-                                     dhcp_opts=lease['unknown-245'],
-                                     iso_dev=self.iso_dev)
+            get_metadata_from_fabric(
+                fallback_lease_file=None,
+                dhcp_opts=lease["unknown-245"],
+                iso_dev=self.iso_dev,
+            )
             return True
         except Exception as e:
             report_diagnostic_event(
                 "Error communicating with Azure fabric; You may experience "
-                "connectivity issues: %s" % e, logger_func=LOG.warning)
+                "connectivity issues: %s" % e,
+                logger_func=LOG.warning,
+            )
             return False
 
     def _ppstype_from_imds(self, imds_md: dict = None) -> str:
         try:
-            return imds_md['extended']['compute']['ppsType']
+            return imds_md["extended"]["compute"]["ppsType"]
         except Exception as e:
             report_diagnostic_event(
-                "Could not retrieve pps configuration from IMDS: %s" %
-                e, logger_func=LOG.debug)
+                "Could not retrieve pps configuration from IMDS: %s" % e,
+                logger_func=LOG.debug,
+            )
             return None
 
     def _should_reprovision_after_nic_attach(
-            self, ovf_md, imds_md=None) -> bool:
+        self, ovf_md, imds_md=None
+    ) -> bool:
         """Whether or not we should wait for nic attach and then poll
         IMDS for reprovisioning data. Also sets a marker file to poll IMDS.
 
@@ -1360,14 +1455,19 @@ class DataSourceAzure(sources.DataSource):
             return False
         (_md, _userdata_raw, cfg, _files) = ovf_md
         path = REPROVISION_NIC_ATTACH_MARKER_FILE
-        if (cfg.get('PreprovisionedVMType', None) == "Savable" or
-            self._ppstype_from_imds(imds_md) == "Savable" or
-                os.path.isfile(path)):
+        if (
+            cfg.get("PreprovisionedVMType", None) == "Savable"
+            or self._ppstype_from_imds(imds_md) == "Savable"
+            or os.path.isfile(path)
+        ):
             if not os.path.isfile(path):
-                LOG.info("Creating a marker file to wait for nic attach: %s",
-                         path)
-                util.write_file(path, "{pid}: {time}\n".format(
-                    pid=os.getpid(), time=time()))
+                LOG.info(
+                    "Creating a marker file to wait for nic attach: %s", path
+                )
+                util.write_file(
+                    path,
+                    "{pid}: {time}\n".format(pid=os.getpid(), time=time()),
+                )
             return True
         return False
 
@@ -1386,15 +1486,18 @@ class DataSourceAzure(sources.DataSource):
             return False
         (_md, _userdata_raw, cfg, _files) = ovf_md
         path = REPROVISION_MARKER_FILE
-        if (cfg.get('PreprovisionedVm') is True or
-            cfg.get('PreprovisionedVMType', None) == 'Running' or
-            self._ppstype_from_imds(imds_md) == "Running" or
-                os.path.isfile(path)):
+        if (
+            cfg.get("PreprovisionedVm") is True
+            or cfg.get("PreprovisionedVMType", None) == "Running"
+            or self._ppstype_from_imds(imds_md) == "Running"
+            or os.path.isfile(path)
+        ):
             if not os.path.isfile(path):
-                LOG.info("Creating a marker file to poll imds: %s",
-                         path)
-                util.write_file(path, "{pid}: {time}\n".format(
-                    pid=os.getpid(), time=time()))
+                LOG.info("Creating a marker file to poll imds: %s", path)
+                util.write_file(
+                    path,
+                    "{pid}: {time}\n".format(pid=os.getpid(), time=time()),
+                )
             return True
         return False
 
@@ -1402,35 +1505,35 @@ class DataSourceAzure(sources.DataSource):
         """Initiate the reprovisioning workflow."""
         contents = self._poll_imds()
         with events.ReportEventStack(
-                name="reprovisioning-read-azure-ovf",
-                description="read azure ovf during reprovisioning",
-                parent=azure_ds_reporter):
+            name="reprovisioning-read-azure-ovf",
+            description="read azure ovf during reprovisioning",
+            parent=azure_ds_reporter,
+        ):
             md, ud, cfg = read_azure_ovf(contents)
-            return (md, ud, cfg, {'ovf-env.xml': contents})
+            return (md, ud, cfg, {"ovf-env.xml": contents})
 
     @azure_ds_telemetry_reporter
     def _negotiate(self):
         """Negotiate with fabric and return data from it.
 
-           On success, returns a dictionary including 'public_keys'.
-           On failure, returns False.
+        On success, returns a dictionary including 'public_keys'.
+        On failure, returns False.
         """
         pubkey_info = None
         ssh_keys_and_source = self._get_public_ssh_keys_and_source()
 
         if not ssh_keys_and_source.keys_from_imds:
-            pubkey_info = self.cfg.get('_pubkeys', None)
-            log_msg = 'Retrieved {} fingerprints from OVF'.format(
-                len(pubkey_info)
-                if pubkey_info is not None
-                else 0
+            pubkey_info = self.cfg.get("_pubkeys", None)
+            log_msg = "Retrieved {} fingerprints from OVF".format(
+                len(pubkey_info) if pubkey_info is not None else 0
             )
             report_diagnostic_event(log_msg, logger_func=LOG.debug)
 
-        metadata_func = partial(get_metadata_from_fabric,
-                                fallback_lease_file=self.
-                                dhclient_lease_file,
-                                pubkey_info=pubkey_info)
+        metadata_func = partial(
+            get_metadata_from_fabric,
+            fallback_lease_file=self.dhclient_lease_file,
+            pubkey_info=pubkey_info,
+        )
 
         LOG.debug("negotiating with fabric")
         try:
@@ -1438,7 +1541,9 @@ class DataSourceAzure(sources.DataSource):
         except Exception as e:
             report_diagnostic_event(
                 "Error communicating with Azure fabric; You may experience "
-                "connectivity issues: %s" % e, logger_func=LOG.warning)
+                "connectivity issues: %s" % e,
+                logger_func=LOG.warning,
+            )
             return False
 
         util.del_file(REPORTED_READY_MARKER_FILE)
@@ -1450,30 +1555,34 @@ class DataSourceAzure(sources.DataSource):
     @azure_ds_telemetry_reporter
     def activate(self, cfg, is_new_instance):
         try:
-            address_ephemeral_resize(is_new_instance=is_new_instance,
-                                     preserve_ntfs=self.ds_cfg.get(
-                                         DS_CFG_KEY_PRESERVE_NTFS, False))
+            address_ephemeral_resize(
+                is_new_instance=is_new_instance,
+                preserve_ntfs=self.ds_cfg.get(DS_CFG_KEY_PRESERVE_NTFS, False),
+            )
         finally:
-            push_log_to_kvp(self.sys_cfg['def_log_file'])
+            push_log_to_kvp(self.sys_cfg["def_log_file"])
         return
 
     @property
     def availability_zone(self):
-        return self.metadata.get(
-            'imds', {}).get('compute', {}).get('platformFaultDomain')
+        return (
+            self.metadata.get("imds", {})
+            .get("compute", {})
+            .get("platformFaultDomain")
+        )
 
     @property
     def network_config(self):
         """Generate a network config like net.generate_fallback_network() with
-           the following exceptions.
+        the following exceptions.
 
-           1. Probe the drivers of the net-devices present and inject them in
-              the network configuration under params: driver: <driver> value
-           2. Generate a fallback network config that does not include any of
-              the blacklisted devices.
+        1. Probe the drivers of the net-devices present and inject them in
+           the network configuration under params: driver: <driver> value
+        2. Generate a fallback network config that does not include any of
+           the blacklisted devices.
         """
         if not self._network_config or self._network_config == sources.UNSET:
-            if self.ds_cfg.get('apply_network_config'):
+            if self.ds_cfg.get("apply_network_config"):
                 nc_src = self._metadata_imds
             else:
                 nc_src = None
@@ -1482,33 +1591,36 @@ class DataSourceAzure(sources.DataSource):
 
     @property
     def region(self):
-        return self.metadata.get('imds', {}).get('compute', {}).get('location')
+        return self.metadata.get("imds", {}).get("compute", {}).get("location")
 
 
 def _username_from_imds(imds_data):
     try:
-        return imds_data['compute']['osProfile']['adminUsername']
+        return imds_data["compute"]["osProfile"]["adminUsername"]
     except KeyError:
         return None
 
 
 def _userdata_from_imds(imds_data):
     try:
-        return imds_data['compute']['userData']
+        return imds_data["compute"]["userData"]
     except KeyError:
         return None
 
 
 def _hostname_from_imds(imds_data):
     try:
-        return imds_data['compute']['osProfile']['computerName']
+        return imds_data["compute"]["osProfile"]["computerName"]
     except KeyError:
         return None
 
 
 def _disable_password_from_imds(imds_data):
     try:
-        return imds_data['compute']['osProfile']['disablePasswordAuthentication'] == 'true'  # noqa: E501
+        return (
+            imds_data["compute"]["osProfile"]["disablePasswordAuthentication"]
+            == "true"
+        )
     except KeyError:
         return None
 
@@ -1518,7 +1630,7 @@ def _key_is_openssh_formatted(key):
     Validate whether or not the key is OpenSSH-formatted.
     """
     # See https://bugs.launchpad.net/cloud-init/+bug/1910835
-    if '\r\n' in key.strip():
+    if "\r\n" in key.strip():
         return False
 
     parser = ssh_util.AuthKeyLineParser()
@@ -1546,7 +1658,7 @@ def _partitions_on_device(devpath, maxnum=16):
 @azure_ds_telemetry_reporter
 def _has_ntfs_filesystem(devpath):
     ntfs_devices = util.find_devs_with("TYPE=ntfs", no_cache=True)
-    LOG.debug('ntfs_devices found = %s', ntfs_devices)
+    LOG.debug("ntfs_devices found = %s", ntfs_devices)
     return os.path.realpath(devpath) in ntfs_devices
 
 
@@ -1570,24 +1682,29 @@ def can_dev_be_reformatted(devpath, preserve_ntfs):
     If cloud-init cannot mount the disk to check for data, destruction
     will be allowed, unless the dscfg key is set."""
     if preserve_ntfs:
-        msg = ('config says to never destroy NTFS (%s.%s), skipping checks' %
-               (".".join(DS_CFG_PATH), DS_CFG_KEY_PRESERVE_NTFS))
+        msg = "config says to never destroy NTFS (%s.%s), skipping checks" % (
+            ".".join(DS_CFG_PATH),
+            DS_CFG_KEY_PRESERVE_NTFS,
+        )
         return False, msg
 
     if not os.path.exists(devpath):
-        return False, 'device %s does not exist' % devpath
+        return False, "device %s does not exist" % devpath
 
-    LOG.debug('Resolving realpath of %s -> %s', devpath,
-              os.path.realpath(devpath))
+    LOG.debug(
+        "Resolving realpath of %s -> %s", devpath, os.path.realpath(devpath)
+    )
 
     # devpath of /dev/sd[a-z] or /dev/disk/cloud/azure_resource
     # where partitions are "<devpath>1" or "<devpath>-part1" or "<devpath>p1"
     partitions = _partitions_on_device(devpath)
     if len(partitions) == 0:
-        return False, 'device %s was not partitioned' % devpath
+        return False, "device %s was not partitioned" % devpath
     elif len(partitions) > 2:
-        msg = ('device %s had 3 or more partitions: %s' %
-               (devpath, ' '.join([p[1] for p in partitions])))
+        msg = "device %s had 3 or more partitions: %s" % (
+            devpath,
+            " ".join([p[1] for p in partitions]),
+        )
         return False, msg
     elif len(partitions) == 2:
         cand_part, cand_path = partitions[1]
@@ -1595,57 +1712,78 @@ def can_dev_be_reformatted(devpath, preserve_ntfs):
         cand_part, cand_path = partitions[0]
 
     if not _has_ntfs_filesystem(cand_path):
-        msg = ('partition %s (%s) on device %s was not ntfs formatted' %
-               (cand_part, cand_path, devpath))
+        msg = "partition %s (%s) on device %s was not ntfs formatted" % (
+            cand_part,
+            cand_path,
+            devpath,
+        )
         return False, msg
 
     @azure_ds_telemetry_reporter
     def count_files(mp):
-        ignored = set(['dataloss_warning_readme.txt'])
+        ignored = set(["dataloss_warning_readme.txt"])
         return len([f for f in os.listdir(mp) if f.lower() not in ignored])
 
-    bmsg = ('partition %s (%s) on device %s was ntfs formatted' %
-            (cand_part, cand_path, devpath))
+    bmsg = "partition %s (%s) on device %s was ntfs formatted" % (
+        cand_part,
+        cand_path,
+        devpath,
+    )
 
     with events.ReportEventStack(
         name="mount-ntfs-and-count",
         description="mount-ntfs-and-count",
-        parent=azure_ds_reporter
+        parent=azure_ds_reporter,
     ) as evt:
         try:
-            file_count = util.mount_cb(cand_path, count_files, mtype="ntfs",
-                                       update_env_for_mount={'LANG': 'C'})
+            file_count = util.mount_cb(
+                cand_path,
+                count_files,
+                mtype="ntfs",
+                update_env_for_mount={"LANG": "C"},
+            )
         except util.MountFailedError as e:
             evt.description = "cannot mount ntfs"
             if "unknown filesystem type 'ntfs'" in str(e):
-                return True, (bmsg + ' but this system cannot mount NTFS,'
-                              ' assuming there are no important files.'
-                              ' Formatting allowed.')
-            return False, bmsg + ' but mount of %s failed: %s' % (cand_part, e)
+                return (
+                    True,
+                    (
+                        bmsg + " but this system cannot mount NTFS,"
+                        " assuming there are no important files."
+                        " Formatting allowed."
+                    ),
+                )
+            return False, bmsg + " but mount of %s failed: %s" % (cand_part, e)
 
         if file_count != 0:
             evt.description = "mounted and counted %d files" % file_count
-            LOG.warning("it looks like you're using NTFS on the ephemeral"
-                        " disk, to ensure that filesystem does not get wiped,"
-                        " set %s.%s in config", '.'.join(DS_CFG_PATH),
-                        DS_CFG_KEY_PRESERVE_NTFS)
-            return False, bmsg + ' but had %d files on it.' % file_count
+            LOG.warning(
+                "it looks like you're using NTFS on the ephemeral"
+                " disk, to ensure that filesystem does not get wiped,"
+                " set %s.%s in config",
+                ".".join(DS_CFG_PATH),
+                DS_CFG_KEY_PRESERVE_NTFS,
+            )
+            return False, bmsg + " but had %d files on it." % file_count
 
-    return True, bmsg + ' and had no important files. Safe for reformatting.'
+    return True, bmsg + " and had no important files. Safe for reformatting."
 
 
 @azure_ds_telemetry_reporter
-def address_ephemeral_resize(devpath=RESOURCE_DISK_PATH,
-                             is_new_instance=False, preserve_ntfs=False):
+def address_ephemeral_resize(
+    devpath=RESOURCE_DISK_PATH, is_new_instance=False, preserve_ntfs=False
+):
     if not os.path.exists(devpath):
         report_diagnostic_event(
             "Ephemeral resource disk '%s' does not exist." % devpath,
-            logger_func=LOG.debug)
+            logger_func=LOG.debug,
+        )
         return
     else:
         report_diagnostic_event(
             "Ephemeral resource disk '%s' exists." % devpath,
-            logger_func=LOG.debug)
+            logger_func=LOG.debug,
+        )
 
     result = False
     msg = None
@@ -1658,31 +1796,32 @@ def address_ephemeral_resize(devpath=RESOURCE_DISK_PATH,
     if not result:
         return
 
-    for mod in ['disk_setup', 'mounts']:
-        sempath = '/var/lib/cloud/instance/sem/config_' + mod
+    for mod in ["disk_setup", "mounts"]:
+        sempath = "/var/lib/cloud/instance/sem/config_" + mod
         bmsg = 'Marker "%s" for module "%s"' % (sempath, mod)
         if os.path.exists(sempath):
             try:
                 os.unlink(sempath)
-                LOG.debug('%s removed.', bmsg)
+                LOG.debug("%s removed.", bmsg)
             except Exception as e:
                 # python3 throws FileNotFoundError, python2 throws OSError
-                LOG.warning('%s: remove failed! (%s)', bmsg, e)
+                LOG.warning("%s: remove failed! (%s)", bmsg, e)
         else:
-            LOG.debug('%s did not exist.', bmsg)
+            LOG.debug("%s did not exist.", bmsg)
     return
 
 
 @azure_ds_telemetry_reporter
 def write_files(datadir, files, dirmode=None):
-
     def _redact_password(cnt, fname):
         """Azure provides the UserPassword in plain text. So we redact it"""
         try:
             root = ET.fromstring(cnt)
             for elem in root.iter():
-                if ('UserPassword' in elem.tag and
-                   elem.text != DEF_PASSWD_REDACTION):
+                if (
+                    "UserPassword" in elem.tag
+                    and elem.text != DEF_PASSWD_REDACTION
+                ):
                     elem.text = DEF_PASSWD_REDACTION
             return ET.tostring(root)
         except Exception:
@@ -1696,7 +1835,7 @@ def write_files(datadir, files, dirmode=None):
     util.ensure_dir(datadir, dirmode)
     for (name, content) in files.items():
         fname = os.path.join(datadir, name)
-        if 'ovf-env.xml' in name:
+        if "ovf-env.xml" in name:
             content = _redact_password(content, fname)
         util.write_file(filename=fname, content=content, mode=0o600)
 
@@ -1728,8 +1867,9 @@ def load_azure_ovf_pubkeys(sshnode):
     if len(results) == 0:
         return []
     if len(results) > 1:
-        raise BrokenAzureDataSource("Multiple 'PublicKeys'(%s) in SSH node" %
-                                    len(results))
+        raise BrokenAzureDataSource(
+            "Multiple 'PublicKeys'(%s) in SSH node" % len(results)
+        )
 
     pubkeys_node = results[0]
     pubkeys = find_child(pubkeys_node, lambda n: n.localName == "PublicKey")
@@ -1744,7 +1884,7 @@ def load_azure_ovf_pubkeys(sshnode):
         if not pk_node.hasChildNodes():
             continue
 
-        cur = {'fingerprint': "", 'path': "", 'value': ""}
+        cur = {"fingerprint": "", "path": "", "value": ""}
         for child in pk_node.childNodes:
             if child.nodeType == text_node or not child.localName:
                 continue
@@ -1754,8 +1894,10 @@ def load_azure_ovf_pubkeys(sshnode):
             if name not in cur.keys():
                 continue
 
-            if (len(child.childNodes) != 1 or
-                    child.childNodes[0].nodeType != text_node):
+            if (
+                len(child.childNodes) != 1
+                or child.childNodes[0].nodeType != text_node
+            ):
                 continue
 
             cur[name] = child.childNodes[0].wholeText.strip()
@@ -1773,33 +1915,37 @@ def read_azure_ovf(contents):
         report_diagnostic_event(error_str, logger_func=LOG.warning)
         raise BrokenAzureDataSource(error_str) from e
 
-    results = find_child(dom.documentElement,
-                         lambda n: n.localName == "ProvisioningSection")
+    results = find_child(
+        dom.documentElement, lambda n: n.localName == "ProvisioningSection"
+    )
 
     if len(results) == 0:
         raise NonAzureDataSource("No ProvisioningSection")
     if len(results) > 1:
-        raise BrokenAzureDataSource("found '%d' ProvisioningSection items" %
-                                    len(results))
+        raise BrokenAzureDataSource(
+            "found '%d' ProvisioningSection items" % len(results)
+        )
     provSection = results[0]
 
-    lpcs_nodes = find_child(provSection,
-                            lambda n:
-                            n.localName == "LinuxProvisioningConfigurationSet")
+    lpcs_nodes = find_child(
+        provSection,
+        lambda n: n.localName == "LinuxProvisioningConfigurationSet",
+    )
 
     if len(lpcs_nodes) == 0:
         raise NonAzureDataSource("No LinuxProvisioningConfigurationSet")
     if len(lpcs_nodes) > 1:
-        raise BrokenAzureDataSource("found '%d' %ss" %
-                                    (len(lpcs_nodes),
-                                     "LinuxProvisioningConfigurationSet"))
+        raise BrokenAzureDataSource(
+            "found '%d' %ss"
+            % (len(lpcs_nodes), "LinuxProvisioningConfigurationSet")
+        )
     lpcs = lpcs_nodes[0]
 
     if not lpcs.hasChildNodes():
         raise BrokenAzureDataSource("no child nodes of configuration set")
 
-    md_props = 'seedfrom'
-    md = {'azure_data': {}}
+    md_props = "seedfrom"
+    md = {"azure_data": {}}
     cfg = {}
     ud = ""
     password = None
@@ -1813,8 +1959,10 @@ def read_azure_ovf(contents):
 
         simple = False
         value = ""
-        if (len(child.childNodes) == 1 and
-                child.childNodes[0].nodeType == dom.TEXT_NODE):
+        if (
+            len(child.childNodes) == 1
+            and child.childNodes[0].nodeType == dom.TEXT_NODE
+        ):
             simple = True
             value = child.childNodes[0].wholeText
 
@@ -1823,8 +1971,8 @@ def read_azure_ovf(contents):
         # we accept either UserData or CustomData.  If both are present
         # then behavior is undefined.
         if name == "userdata" or name == "customdata":
-            if attrs.get('encoding') in (None, "base64"):
-                ud = base64.b64decode(''.join(value.split()))
+            if attrs.get("encoding") in (None, "base64"):
+                ud = base64.b64decode("".join(value.split()))
             else:
                 ud = value
         elif name == "username":
@@ -1832,36 +1980,36 @@ def read_azure_ovf(contents):
         elif name == "userpassword":
             password = value
         elif name == "hostname":
-            md['local-hostname'] = value
+            md["local-hostname"] = value
         elif name == "dscfg":
-            if attrs.get('encoding') in (None, "base64"):
-                dscfg = base64.b64decode(''.join(value.split()))
+            if attrs.get("encoding") in (None, "base64"):
+                dscfg = base64.b64decode("".join(value.split()))
             else:
                 dscfg = value
-            cfg['datasource'] = {DS_NAME: util.load_yaml(dscfg, default={})}
+            cfg["datasource"] = {DS_NAME: util.load_yaml(dscfg, default={})}
         elif name == "ssh":
-            cfg['_pubkeys'] = load_azure_ovf_pubkeys(child)
+            cfg["_pubkeys"] = load_azure_ovf_pubkeys(child)
         elif name == "disablesshpasswordauthentication":
-            cfg['ssh_pwauth'] = util.is_false(value)
+            cfg["ssh_pwauth"] = util.is_false(value)
         elif simple:
             if name in md_props:
                 md[name] = value
             else:
-                md['azure_data'][name] = value
+                md["azure_data"][name] = value
 
     defuser = {}
     if username:
-        defuser['name'] = username
+        defuser["name"] = username
     if password:
-        defuser['lock_passwd'] = False
+        defuser["lock_passwd"] = False
         if DEF_PASSWD_REDACTION != password:
-            defuser['passwd'] = cfg['password'] = encrypt_pass(password)
+            defuser["passwd"] = cfg["password"] = encrypt_pass(password)
 
     if defuser:
-        cfg['system_info'] = {'default_user': defuser}
+        cfg["system_info"] = {"default_user": defuser}
 
-    if 'ssh_pwauth' not in cfg and password:
-        cfg['ssh_pwauth'] = True
+    if "ssh_pwauth" not in cfg and password:
+        cfg["ssh_pwauth"] = True
 
     preprovisioning_cfg = _get_preprovisioning_cfgs(dom)
     cfg = util.mergemanydict([cfg, preprovisioning_cfg])
@@ -1887,20 +2035,18 @@ def _get_preprovisioning_cfgs(dom):
     More specifically, this will never happen:
         - PreprovisionedVm=True and PreprovisionedVMType=Savable
     """
-    cfg = {
-        "PreprovisionedVm": False,
-        "PreprovisionedVMType": None
-    }
+    cfg = {"PreprovisionedVm": False, "PreprovisionedVMType": None}
 
     platform_settings_section = find_child(
-        dom.documentElement,
-        lambda n: n.localName == "PlatformSettingsSection")
+        dom.documentElement, lambda n: n.localName == "PlatformSettingsSection"
+    )
     if not platform_settings_section or len(platform_settings_section) == 0:
         LOG.debug("PlatformSettingsSection not found")
         return cfg
     platform_settings = find_child(
         platform_settings_section[0],
-        lambda n: n.localName == "PlatformSettings")
+        lambda n: n.localName == "PlatformSettings",
+    )
     if not platform_settings or len(platform_settings) == 0:
         LOG.debug("PlatformSettings not found")
         return cfg
@@ -1909,10 +2055,12 @@ def _get_preprovisioning_cfgs(dom):
     # platform has removed PreprovisionedVm and only surfaces
     # PreprovisionedVMType.
     cfg["PreprovisionedVm"] = _get_preprovisionedvm_cfg_value(
-        platform_settings)
+        platform_settings
+    )
 
     cfg["PreprovisionedVMType"] = _get_preprovisionedvmtype_cfg_value(
-        platform_settings)
+        platform_settings
+    )
     return cfg
 
 
@@ -1924,16 +2072,18 @@ def _get_preprovisionedvm_cfg_value(platform_settings):
     # platform has removed PreprovisionedVm and only surfaces
     # PreprovisionedVMType.
     preprovisionedVmVal = find_child(
-        platform_settings[0],
-        lambda n: n.localName == "PreprovisionedVm")
+        platform_settings[0], lambda n: n.localName == "PreprovisionedVm"
+    )
     if not preprovisionedVmVal or len(preprovisionedVmVal) == 0:
         LOG.debug("PreprovisionedVm not found")
         return preprovisionedVm
     preprovisionedVm = util.translate_bool(
-        preprovisionedVmVal[0].firstChild.nodeValue)
+        preprovisionedVmVal[0].firstChild.nodeValue
+    )
 
     report_diagnostic_event(
-        "PreprovisionedVm: %s" % preprovisionedVm, logger_func=LOG.info)
+        "PreprovisionedVm: %s" % preprovisionedVm, logger_func=LOG.info
+    )
 
     return preprovisionedVm
 
@@ -1952,18 +2102,21 @@ def _get_preprovisionedvmtype_cfg_value(platform_settings):
     # Once assigned to customer, the customer-requested nics are
     # hot-attached to it and reprovision happens like today.
     preprovisionedVMTypeVal = find_child(
-        platform_settings[0],
-        lambda n: n.localName == "PreprovisionedVMType")
-    if (not preprovisionedVMTypeVal or len(preprovisionedVMTypeVal) == 0 or
-            preprovisionedVMTypeVal[0].firstChild is None):
+        platform_settings[0], lambda n: n.localName == "PreprovisionedVMType"
+    )
+    if (
+        not preprovisionedVMTypeVal
+        or len(preprovisionedVMTypeVal) == 0
+        or preprovisionedVMTypeVal[0].firstChild is None
+    ):
         LOG.debug("PreprovisionedVMType not found")
         return preprovisionedVMType
 
     preprovisionedVMType = preprovisionedVMTypeVal[0].firstChild.nodeValue
 
     report_diagnostic_event(
-        "PreprovisionedVMType: %s" % preprovisionedVMType,
-        logger_func=LOG.info)
+        "PreprovisionedVMType: %s" % preprovisionedVMType, logger_func=LOG.info
+    )
 
     return preprovisionedVMType
 
@@ -1987,7 +2140,7 @@ def _check_freebsd_cdrom(cdrom_dev):
 @azure_ds_telemetry_reporter
 def _get_random_seed(source=PLATFORM_ENTROPY_SOURCE):
     """Return content random seed file if available, otherwise,
-       return None."""
+    return None."""
     # azure / hyper-v provides random data here
     # now update ds_cfg to reflect contents pass in config
     if source is None:
@@ -2034,7 +2187,7 @@ def load_azure_ds_dir(source_dir):
         contents = fp.read()
 
     md, ud, cfg = read_azure_ovf(contents)
-    return (md, ud, cfg, {'ovf-env.xml': contents})
+    return (md, ud, cfg, {"ovf-env.xml": contents})
 
 
 @azure_ds_telemetry_reporter
@@ -2051,12 +2204,14 @@ def parse_network_config(imds_metadata) -> dict:
             return _generate_network_config_from_imds_metadata(imds_metadata)
         except Exception as e:
             LOG.error(
-                'Failed generating network config '
-                'from IMDS network metadata: %s', str(e))
+                "Failed generating network config "
+                "from IMDS network metadata: %s",
+                str(e),
+            )
     try:
         return _generate_network_config_from_fallback_config()
     except Exception as e:
-        LOG.error('Failed generating fallback network config: %s', str(e))
+        LOG.error("Failed generating fallback network config: %s", str(e))
     return {}
 
 
@@ -2068,57 +2223,60 @@ def _generate_network_config_from_imds_metadata(imds_metadata) -> dict:
     @param: imds_metadata: Dict of content read from IMDS network service.
     @return: Dictionary containing network version 2 standard configuration.
     """
-    netconfig = {'version': 2, 'ethernets': {}}
-    network_metadata = imds_metadata['network']
-    for idx, intf in enumerate(network_metadata['interface']):
+    netconfig = {"version": 2, "ethernets": {}}
+    network_metadata = imds_metadata["network"]
+    for idx, intf in enumerate(network_metadata["interface"]):
         has_ip_address = False
         # First IPv4 and/or IPv6 address will be obtained via DHCP.
         # Any additional IPs of each type will be set as static
         # addresses.
-        nicname = 'eth{idx}'.format(idx=idx)
-        dhcp_override = {'route-metric': (idx + 1) * 100}
-        dev_config = {'dhcp4': True, 'dhcp4-overrides': dhcp_override,
-                      'dhcp6': False}
-        for addr_type in ('ipv4', 'ipv6'):
-            addresses = intf.get(addr_type, {}).get('ipAddress', [])
+        nicname = "eth{idx}".format(idx=idx)
+        dhcp_override = {"route-metric": (idx + 1) * 100}
+        dev_config = {
+            "dhcp4": True,
+            "dhcp4-overrides": dhcp_override,
+            "dhcp6": False,
+        }
+        for addr_type in ("ipv4", "ipv6"):
+            addresses = intf.get(addr_type, {}).get("ipAddress", [])
             # If there are no available IP addresses, then we don't
             # want to add this interface to the generated config.
             if not addresses:
                 continue
             has_ip_address = True
-            if addr_type == 'ipv4':
-                default_prefix = '24'
+            if addr_type == "ipv4":
+                default_prefix = "24"
             else:
-                default_prefix = '128'
+                default_prefix = "128"
                 if addresses:
-                    dev_config['dhcp6'] = True
+                    dev_config["dhcp6"] = True
                     # non-primary interfaces should have a higher
                     # route-metric (cost) so default routes prefer
                     # primary nic due to lower route-metric value
-                    dev_config['dhcp6-overrides'] = dhcp_override
+                    dev_config["dhcp6-overrides"] = dhcp_override
             for addr in addresses[1:]:
                 # Append static address config for ip > 1
-                netPrefix = intf[addr_type]['subnet'][0].get(
-                    'prefix', default_prefix)
-                privateIp = addr['privateIpAddress']
-                if not dev_config.get('addresses'):
-                    dev_config['addresses'] = []
-                dev_config['addresses'].append(
-                    '{ip}/{prefix}'.format(
-                        ip=privateIp, prefix=netPrefix))
+                netPrefix = intf[addr_type]["subnet"][0].get(
+                    "prefix", default_prefix
+                )
+                privateIp = addr["privateIpAddress"]
+                if not dev_config.get("addresses"):
+                    dev_config["addresses"] = []
+                dev_config["addresses"].append(
+                    "{ip}/{prefix}".format(ip=privateIp, prefix=netPrefix)
+                )
         if dev_config and has_ip_address:
-            mac = ':'.join(re.findall(r'..', intf['macAddress']))
-            dev_config.update({
-                'match': {'macaddress': mac.lower()},
-                'set-name': nicname
-            })
+            mac = ":".join(re.findall(r"..", intf["macAddress"]))
+            dev_config.update(
+                {"match": {"macaddress": mac.lower()}, "set-name": nicname}
+            )
             # With netvsc, we can get two interfaces that
             # share the same MAC, so we need to make sure
             # our match condition also contains the driver
             driver = device_driver(nicname)
-            if driver and driver == 'hv_netvsc':
-                dev_config['match']['driver'] = driver
-            netconfig['ethernets'][nicname] = dev_config
+            if driver and driver == "hv_netvsc":
+                dev_config["match"]["driver"] = driver
+            netconfig["ethernets"][nicname] = dev_config
     return netconfig
 
 
@@ -2129,16 +2287,19 @@ def _generate_network_config_from_fallback_config() -> dict:
     @return: Dictionary containing network version 2 standard configuration.
     """
     return net.generate_fallback_config(
-        blacklist_drivers=BLACKLIST_DRIVERS, config_driver=True)
+        blacklist_drivers=BLACKLIST_DRIVERS, config_driver=True
+    )
 
 
 @azure_ds_telemetry_reporter
-def get_metadata_from_imds(fallback_nic,
-                           retries,
-                           md_type=metadata_type.all,
-                           api_version=IMDS_VER_MIN,
-                           exc_cb=retry_on_url_exc,
-                           infinite=False):
+def get_metadata_from_imds(
+    fallback_nic,
+    retries,
+    md_type=metadata_type.all,
+    api_version=IMDS_VER_MIN,
+    exc_cb=retry_on_url_exc,
+    infinite=False,
+):
     """Query Azure's instance metadata service, returning a dictionary.
 
     If network is not up, setup ephemeral dhcp on fallback_nic to talk to the
@@ -2154,31 +2315,34 @@ def get_metadata_from_imds(fallback_nic,
     @return: A dict of instance metadata containing compute and network
         info.
     """
-    kwargs = {'logfunc': LOG.debug,
-              'msg': 'Crawl of Azure Instance Metadata Service (IMDS)',
-              'func': _get_metadata_from_imds,
-              'args': (retries, exc_cb, md_type, api_version, infinite)}
+    kwargs = {
+        "logfunc": LOG.debug,
+        "msg": "Crawl of Azure Instance Metadata Service (IMDS)",
+        "func": _get_metadata_from_imds,
+        "args": (retries, exc_cb, md_type, api_version, infinite),
+    }
     if net.is_up(fallback_nic):
         return util.log_time(**kwargs)
     else:
         try:
-            with EphemeralDHCPv4WithReporting(
-                    azure_ds_reporter, fallback_nic):
+            with EphemeralDHCPv4WithReporting(azure_ds_reporter, fallback_nic):
                 return util.log_time(**kwargs)
         except Exception as e:
             report_diagnostic_event(
                 "exception while getting metadata: %s" % e,
-                logger_func=LOG.warning)
+                logger_func=LOG.warning,
+            )
             raise
 
 
 @azure_ds_telemetry_reporter
 def _get_metadata_from_imds(
-        retries,
-        exc_cb,
-        md_type=metadata_type.all,
-        api_version=IMDS_VER_MIN,
-        infinite=False):
+    retries,
+    exc_cb,
+    md_type=metadata_type.all,
+    api_version=IMDS_VER_MIN,
+    infinite=False,
+):
     url = "{}?api-version={}".format(md_type.value, api_version)
     headers = {"Metadata": "true"}
 
@@ -2188,20 +2352,27 @@ def _get_metadata_from_imds(
 
     try:
         response = readurl(
-            url, timeout=IMDS_TIMEOUT_IN_SECONDS, headers=headers,
-            retries=retries, exception_cb=exc_cb, infinite=infinite)
+            url,
+            timeout=IMDS_TIMEOUT_IN_SECONDS,
+            headers=headers,
+            retries=retries,
+            exception_cb=exc_cb,
+            infinite=infinite,
+        )
     except Exception as e:
         # pylint:disable=no-member
         if isinstance(e, UrlError) and e.code == 400:
             raise
         else:
             report_diagnostic_event(
-                'Ignoring IMDS instance metadata. '
-                'Get metadata from IMDS failed: %s' % e,
-                logger_func=LOG.warning)
+                "Ignoring IMDS instance metadata. "
+                "Get metadata from IMDS failed: %s" % e,
+                logger_func=LOG.warning,
+            )
             return {}
     try:
         from json.decoder import JSONDecodeError
+
         json_decode_error = JSONDecodeError
     except ImportError:
         json_decode_error = ValueError
@@ -2210,9 +2381,10 @@ def _get_metadata_from_imds(
         return util.load_json(str(response))
     except json_decode_error as e:
         report_diagnostic_event(
-            'Ignoring non-json IMDS instance metadata response: %s. '
-            'Loading non-json IMDS response failed: %s' % (str(response), e),
-            logger_func=LOG.warning)
+            "Ignoring non-json IMDS instance metadata response: %s. "
+            "Loading non-json IMDS response failed: %s" % (str(response), e),
+            logger_func=LOG.warning,
+        )
     return {}
 
 
@@ -2242,10 +2414,11 @@ def maybe_remove_ubuntu_network_config_scripts(paths=None):
         if os.path.exists(path):
             if not logged:
                 LOG.info(
-                    'Removing Ubuntu extended network scripts because'
-                    ' cloud-init updates Azure network configuration on the'
-                    ' following events: %s.',
-                    [EventType.BOOT.value, EventType.BOOT_LEGACY.value])
+                    "Removing Ubuntu extended network scripts because"
+                    " cloud-init updates Azure network configuration on the"
+                    " following events: %s.",
+                    [EventType.BOOT.value, EventType.BOOT_LEGACY.value],
+                )
                 logged = True
             if os.path.isdir(path):
                 util.del_dir(path)
@@ -2258,15 +2431,15 @@ def _is_platform_viable(seed_dir):
     with events.ReportEventStack(
         name="check-platform-viability",
         description="found azure asset tag",
-        parent=azure_ds_reporter
+        parent=azure_ds_reporter,
     ) as evt:
-        asset_tag = dmi.read_dmi_data('chassis-asset-tag')
+        asset_tag = dmi.read_dmi_data("chassis-asset-tag")
         if asset_tag == AZURE_CHASSIS_ASSET_TAG:
             return True
         msg = "Non-Azure DMI asset tag '%s' discovered." % asset_tag
         evt.description = msg
         report_diagnostic_event(msg, logger_func=LOG.debug)
-        if os.path.exists(os.path.join(seed_dir, 'ovf-env.xml')):
+        if os.path.exists(os.path.join(seed_dir, "ovf-env.xml")):
             return True
         return False
 
@@ -2284,7 +2457,7 @@ DataSourceAzureNet = DataSourceAzure
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceAzure, (sources.DEP_FILESYSTEM, )),
+    (DataSourceAzure, (sources.DEP_FILESYSTEM,)),
 ]
 
 
@@ -2292,4 +2465,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceBigstep.py b/cloudinit/sources/DataSourceBigstep.py
index 63435279..426a762e 100644
--- a/cloudinit/sources/DataSourceBigstep.py
+++ b/cloudinit/sources/DataSourceBigstep.py
@@ -7,14 +7,12 @@
 import errno
 import json
 
-from cloudinit import sources
-from cloudinit import url_helper
-from cloudinit import util
+from cloudinit import sources, url_helper, util
 
 
 class DataSourceBigstep(sources.DataSource):
 
-    dsname = 'Bigstep'
+    dsname = "Bigstep"
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
@@ -35,7 +33,7 @@ class DataSourceBigstep(sources.DataSource):
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        return 'metadata (%s)' % get_url_from_file()
+        return "metadata (%s)" % get_url_from_file()
 
 
 def get_url_from_file():
@@ -61,4 +59,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceCloudSigma.py b/cloudinit/sources/DataSourceCloudSigma.py
index f63baf74..de71c3e9 100644
--- a/cloudinit/sources/DataSourceCloudSigma.py
+++ b/cloudinit/sources/DataSourceCloudSigma.py
@@ -4,14 +4,13 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from base64 import b64decode
 import re
-
-from cloudinit.cs_utils import Cepko, SERIAL_PORT
+from base64 import b64decode
 
 from cloudinit import dmi
 from cloudinit import log as logging
 from cloudinit import sources
+from cloudinit.cs_utils import SERIAL_PORT, Cepko
 
 LOG = logging.getLogger(__name__)
 
@@ -24,11 +23,11 @@ class DataSourceCloudSigma(sources.DataSource):
     http://cloudsigma-docs.readthedocs.org/en/latest/server_context.html
     """
 
-    dsname = 'CloudSigma'
+    dsname = "CloudSigma"
 
     def __init__(self, sys_cfg, distro, paths):
         self.cepko = Cepko()
-        self.ssh_public_key = ''
+        self.ssh_public_key = ""
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
 
     def is_running_in_cloudsigma(self):
@@ -43,7 +42,7 @@ class DataSourceCloudSigma(sources.DataSource):
             LOG.debug("system-product-name not available in dmi data")
             return False
         LOG.debug("detected hypervisor as %s", sys_product_name)
-        return 'cloudsigma' in sys_product_name.lower()
+        return "cloudsigma" in sys_product_name.lower()
 
     def _get_data(self):
         """
@@ -56,7 +55,7 @@ class DataSourceCloudSigma(sources.DataSource):
 
         try:
             server_context = self.cepko.all().result
-            server_meta = server_context['meta']
+            server_meta = server_context["meta"]
         except Exception:
             # TODO: check for explicit "config on", and then warn
             # but since no explicit config is available now, just debug.
@@ -64,41 +63,42 @@ class DataSourceCloudSigma(sources.DataSource):
             return False
 
         self.dsmode = self._determine_dsmode(
-            [server_meta.get('cloudinit-dsmode')])
+            [server_meta.get("cloudinit-dsmode")]
+        )
         if dsmode == sources.DSMODE_DISABLED:
             return False
 
-        base64_fields = server_meta.get('base64_fields', '').split(',')
-        self.userdata_raw = server_meta.get('cloudinit-user-data', "")
-        if 'cloudinit-user-data' in base64_fields:
+        base64_fields = server_meta.get("base64_fields", "").split(",")
+        self.userdata_raw = server_meta.get("cloudinit-user-data", "")
+        if "cloudinit-user-data" in base64_fields:
             self.userdata_raw = b64decode(self.userdata_raw)
-        if 'cloudinit' in server_context.get('vendor_data', {}):
+        if "cloudinit" in server_context.get("vendor_data", {}):
             self.vendordata_raw = server_context["vendor_data"]["cloudinit"]
 
         self.metadata = server_context
-        self.ssh_public_key = server_meta['ssh_public_key']
+        self.ssh_public_key = server_meta["ssh_public_key"]
 
         return True
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        return 'cepko (%s)' % SERIAL_PORT
+        return "cepko (%s)" % SERIAL_PORT
 
     def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
         """
         Cleans up and uses the server's name if the latter is set. Otherwise
         the first part from uuid is being used.
         """
-        if re.match(r'^[A-Za-z0-9 -_\.]+$', self.metadata['name']):
-            return self.metadata['name'][:61]
+        if re.match(r"^[A-Za-z0-9 -_\.]+$", self.metadata["name"]):
+            return self.metadata["name"][:61]
         else:
-            return self.metadata['uuid'].split('-')[0]
+            return self.metadata["uuid"].split("-")[0]
 
     def get_public_ssh_keys(self):
         return [self.ssh_public_key]
 
     def get_instance_id(self):
-        return self.metadata['uuid']
+        return self.metadata["uuid"]
 
 
 # Legacy: Must be present in case we load an old pkl object
@@ -107,7 +107,7 @@ DataSourceCloudSigmaNet = DataSourceCloudSigma
 # Used to match classes to dependencies. Since this datasource uses the serial
 # port network is not really required, so it's okay to load without it, too.
 datasources = [
-    (DataSourceCloudSigma, (sources.DEP_FILESYSTEM, )),
+    (DataSourceCloudSigma, (sources.DEP_FILESYSTEM,)),
 ]
 
 
@@ -117,4 +117,5 @@ def get_datasource_list(depends):
     """
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceCloudStack.py b/cloudinit/sources/DataSourceCloudStack.py
index 8cb0d5a7..a742a5e6 100644
--- a/cloudinit/sources/DataSourceCloudStack.py
+++ b/cloudinit/sources/DataSourceCloudStack.py
@@ -13,17 +13,16 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import os
-from socket import inet_ntoa, getaddrinfo, gaierror
-from struct import pack
 import time
+from socket import gaierror, getaddrinfo, inet_ntoa
+from struct import pack
 
 from cloudinit import ec2_utils as ec2
 from cloudinit import log as logging
-from cloudinit.net import dhcp
-from cloudinit import sources
+from cloudinit import sources, subp
 from cloudinit import url_helper as uhelp
-from cloudinit import subp
 from cloudinit import util
+from cloudinit.net import dhcp
 
 LOG = logging.getLogger(__name__)
 
@@ -47,27 +46,36 @@ class CloudStackPasswordServerClient(object):
         # The password server was in the past, a broken HTTP server, but is now
         # fixed.  wget handles this seamlessly, so it's easier to shell out to
         # that rather than write our own handling code.
-        output, _ = subp.subp([
-            'wget', '--quiet', '--tries', '3', '--timeout', '20',
-            '--output-document', '-', '--header',
-            'DomU_Request: {0}'.format(domu_request),
-            '{0}:8080'.format(self.virtual_router_address)
-        ])
+        output, _ = subp.subp(
+            [
+                "wget",
+                "--quiet",
+                "--tries",
+                "3",
+                "--timeout",
+                "20",
+                "--output-document",
+                "-",
+                "--header",
+                "DomU_Request: {0}".format(domu_request),
+                "{0}:8080".format(self.virtual_router_address),
+            ]
+        )
         return output.strip()
 
     def get_password(self):
-        password = self._do_request('send_my_password')
-        if password in ['', 'saved_password']:
+        password = self._do_request("send_my_password")
+        if password in ["", "saved_password"]:
             return None
-        if password == 'bad_request':
-            raise RuntimeError('Error when attempting to fetch root password.')
-        self._do_request('saved_password')
+        if password == "bad_request":
+            raise RuntimeError("Error when attempting to fetch root password.")
+        self._do_request("saved_password")
         return password
 
 
 class DataSourceCloudStack(sources.DataSource):
 
-    dsname = 'CloudStack'
+    dsname = "CloudStack"
 
     # Setup read_url parameters per get_url_params.
     url_max_wait = 120
@@ -75,10 +83,10 @@ class DataSourceCloudStack(sources.DataSource):
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
-        self.seed_dir = os.path.join(paths.seed_dir, 'cs')
+        self.seed_dir = os.path.join(paths.seed_dir, "cs")
         # Cloudstack has its metadata/userdata URLs located at
         # http://<virtual-router-ip>/latest/
-        self.api_ver = 'latest'
+        self.api_ver = "latest"
         self.vr_addr = get_vr_address()
         if not self.vr_addr:
             raise RuntimeError("No virtual router found!")
@@ -91,19 +99,28 @@ class DataSourceCloudStack(sources.DataSource):
         if url_params.max_wait_seconds <= 0:
             return False
 
-        urls = [uhelp.combine_url(self.metadata_address,
-                                  'latest/meta-data/instance-id')]
+        urls = [
+            uhelp.combine_url(
+                self.metadata_address, "latest/meta-data/instance-id"
+            )
+        ]
         start_time = time.time()
         url, _response = uhelp.wait_for_url(
-            urls=urls, max_wait=url_params.max_wait_seconds,
-            timeout=url_params.timeout_seconds, status_cb=LOG.warning)
+            urls=urls,
+            max_wait=url_params.max_wait_seconds,
+            timeout=url_params.timeout_seconds,
+            status_cb=LOG.warning,
+        )
 
         if url:
             LOG.debug("Using metadata source: '%s'", url)
         else:
-            LOG.critical(("Giving up on waiting for the metadata from %s"
-                          " after %s seconds"),
-                         urls, int(time.time() - start_time))
+            LOG.critical(
+                "Giving up on waiting for the metadata from %s"
+                " after %s seconds",
+                urls,
+                int(time.time() - start_time),
+            )
 
         return bool(url)
 
@@ -113,8 +130,8 @@ class DataSourceCloudStack(sources.DataSource):
     def _get_data(self):
         seed_ret = {}
         if util.read_optional_seed(seed_ret, base=(self.seed_dir + "/")):
-            self.userdata_raw = seed_ret['user-data']
-            self.metadata = seed_ret['meta-data']
+            self.userdata_raw = seed_ret["user-data"]
+            self.metadata = seed_ret["meta-data"]
             LOG.debug("Using seeded cloudstack data from: %s", self.seed_dir)
             return True
         try:
@@ -122,39 +139,48 @@ class DataSourceCloudStack(sources.DataSource):
                 return False
             start_time = time.time()
             self.userdata_raw = ec2.get_instance_userdata(
-                self.api_ver, self.metadata_address)
-            self.metadata = ec2.get_instance_metadata(self.api_ver,
-                                                      self.metadata_address)
-            LOG.debug("Crawl of metadata service took %s seconds",
-                      int(time.time() - start_time))
+                self.api_ver, self.metadata_address
+            )
+            self.metadata = ec2.get_instance_metadata(
+                self.api_ver, self.metadata_address
+            )
+            LOG.debug(
+                "Crawl of metadata service took %s seconds",
+                int(time.time() - start_time),
+            )
             password_client = CloudStackPasswordServerClient(self.vr_addr)
             try:
                 set_password = password_client.get_password()
             except Exception:
-                util.logexc(LOG,
-                            'Failed to fetch password from virtual router %s',
-                            self.vr_addr)
+                util.logexc(
+                    LOG,
+                    "Failed to fetch password from virtual router %s",
+                    self.vr_addr,
+                )
             else:
                 if set_password:
                     self.cfg = {
-                        'ssh_pwauth': True,
-                        'password': set_password,
-                        'chpasswd': {
-                            'expire': False,
+                        "ssh_pwauth": True,
+                        "password": set_password,
+                        "chpasswd": {
+                            "expire": False,
                         },
                     }
             return True
         except Exception:
-            util.logexc(LOG, 'Failed fetching from metadata service %s',
-                        self.metadata_address)
+            util.logexc(
+                LOG,
+                "Failed fetching from metadata service %s",
+                self.metadata_address,
+            )
             return False
 
     def get_instance_id(self):
-        return self.metadata['instance-id']
+        return self.metadata["instance-id"]
 
     @property
     def availability_zone(self):
-        return self.metadata['availability-zone']
+        return self.metadata["availability-zone"]
 
 
 def get_data_server():
@@ -183,8 +209,11 @@ def get_default_gateway():
 
 def get_dhclient_d():
     # find lease files directory
-    supported_dirs = ["/var/lib/dhclient", "/var/lib/dhcp",
-                      "/var/lib/NetworkManager"]
+    supported_dirs = [
+        "/var/lib/dhclient",
+        "/var/lib/dhcp",
+        "/var/lib/NetworkManager",
+    ]
     for d in supported_dirs:
         if os.path.exists(d) and len(os.listdir(d)) > 0:
             LOG.debug("Using %s lease directory", d)
@@ -233,15 +262,18 @@ def get_vr_address():
     # Try data-server DNS entry first
     latest_address = get_data_server()
     if latest_address:
-        LOG.debug("Found metadata server '%s' via data-server DNS entry",
-                  latest_address)
+        LOG.debug(
+            "Found metadata server '%s' via data-server DNS entry",
+            latest_address,
+        )
         return latest_address
 
     # Try networkd second...
-    latest_address = dhcp.networkd_get_option_from_leases('SERVER_ADDRESS')
+    latest_address = dhcp.networkd_get_option_from_leases("SERVER_ADDRESS")
     if latest_address:
-        LOG.debug("Found SERVER_ADDRESS '%s' via networkd_leases",
-                  latest_address)
+        LOG.debug(
+            "Found SERVER_ADDRESS '%s' via networkd_leases", latest_address
+        )
         return latest_address
 
     # Try dhcp lease files next...
@@ -275,4 +307,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceConfigDrive.py b/cloudinit/sources/DataSourceConfigDrive.py
index 19c8d126..f7c58b12 100644
--- a/cloudinit/sources/DataSourceConfigDrive.py
+++ b/cloudinit/sources/DataSourceConfigDrive.py
@@ -9,9 +9,7 @@
 import os
 
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import sources, subp, util
 from cloudinit.event import EventScope, EventType
 from cloudinit.net import eni
 from cloudinit.sources.DataSourceIBMCloud import get_ibm_platform
@@ -21,32 +19,35 @@ LOG = logging.getLogger(__name__)
 
 # Various defaults/constants...
 DEFAULT_IID = "iid-dsconfigdrive"
-DEFAULT_MODE = 'pass'
+DEFAULT_MODE = "pass"
 DEFAULT_METADATA = {
     "instance-id": DEFAULT_IID,
 }
-FS_TYPES = ('vfat', 'iso9660')
-LABEL_TYPES = ('config-2', 'CONFIG-2')
-POSSIBLE_MOUNTS = ('sr', 'cd')
-OPTICAL_DEVICES = tuple(('/dev/%s%s' % (z, i) for z in POSSIBLE_MOUNTS
-                        for i in range(0, 2)))
+FS_TYPES = ("vfat", "iso9660")
+LABEL_TYPES = ("config-2", "CONFIG-2")
+POSSIBLE_MOUNTS = ("sr", "cd")
+OPTICAL_DEVICES = tuple(
+    ("/dev/%s%s" % (z, i) for z in POSSIBLE_MOUNTS for i in range(0, 2))
+)
 
 
 class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
 
-    dsname = 'ConfigDrive'
+    dsname = "ConfigDrive"
 
-    supported_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-        EventType.BOOT,
-        EventType.BOOT_LEGACY,
-        EventType.HOTPLUG,
-    }}
+    supported_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+            EventType.BOOT,
+            EventType.BOOT_LEGACY,
+            EventType.HOTPLUG,
+        }
+    }
 
     def __init__(self, sys_cfg, distro, paths):
         super(DataSourceConfigDrive, self).__init__(sys_cfg, distro, paths)
         self.source = None
-        self.seed_dir = os.path.join(paths.seed_dir, 'config_drive')
+        self.seed_dir = os.path.join(paths.seed_dir, "config_drive")
         self.version = None
         self.ec2_metadata = None
         self._network_config = None
@@ -76,15 +77,16 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
                 util.logexc(LOG, "Failed reading config drive from %s", sdir)
 
         if not found:
-            dslist = self.sys_cfg.get('datasource_list')
+            dslist = self.sys_cfg.get("datasource_list")
             for dev in find_candidate_devs(dslist=dslist):
                 mtype = None
                 if util.is_BSD():
                     if dev.startswith("/dev/cd"):
                         mtype = "cd9660"
                 try:
-                    results = util.mount_cb(dev, read_config_drive,
-                                            mtype=mtype)
+                    results = util.mount_cb(
+                        dev, read_config_drive, mtype=mtype
+                    )
                     found = dev
                 except openstack.NonReadable:
                     pass
@@ -97,41 +99,49 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
         if not found:
             return False
 
-        md = results.get('metadata', {})
+        md = results.get("metadata", {})
         md = util.mergemanydict([md, DEFAULT_METADATA])
 
         self.dsmode = self._determine_dsmode(
-            [results.get('dsmode'), self.ds_cfg.get('dsmode'),
-             sources.DSMODE_PASS if results['version'] == 1 else None])
+            [
+                results.get("dsmode"),
+                self.ds_cfg.get("dsmode"),
+                sources.DSMODE_PASS if results["version"] == 1 else None,
+            ]
+        )
 
         if self.dsmode == sources.DSMODE_DISABLED:
             return False
 
         prev_iid = get_previous_iid(self.paths)
-        cur_iid = md['instance-id']
+        cur_iid = md["instance-id"]
         if prev_iid != cur_iid:
             # better would be to handle this centrally, allowing
             # the datasource to do something on new instance id
             # note, networking is only rendered here if dsmode is DSMODE_PASS
             # which means "DISABLED, but render files and networking"
-            on_first_boot(results, distro=self.distro,
-                          network=self.dsmode == sources.DSMODE_PASS)
+            on_first_boot(
+                results,
+                distro=self.distro,
+                network=self.dsmode == sources.DSMODE_PASS,
+            )
 
         # This is legacy and sneaky.  If dsmode is 'pass' then do not claim
         # the datasource was used, even though we did run on_first_boot above.
         if self.dsmode == sources.DSMODE_PASS:
-            LOG.debug("%s: not claiming datasource, dsmode=%s", self,
-                      self.dsmode)
+            LOG.debug(
+                "%s: not claiming datasource, dsmode=%s", self, self.dsmode
+            )
             return False
 
         self.source = found
         self.metadata = md
-        self.ec2_metadata = results.get('ec2-metadata')
-        self.userdata_raw = results.get('userdata')
-        self.version = results['version']
-        self.files.update(results.get('files', {}))
+        self.ec2_metadata = results.get("ec2-metadata")
+        self.userdata_raw = results.get("userdata")
+        self.version = results["version"]
+        self.files.update(results.get("files", {}))
 
-        vd = results.get('vendordata')
+        vd = results.get("vendordata")
         self.vendordata_pure = vd
         try:
             self.vendordata_raw = sources.convert_vendordata(vd)
@@ -143,7 +153,7 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
         # obsolete compared to networkdata (from network_data.json) but both
         # might be present.
         self.network_eni = results.get("network_config")
-        self.network_json = results.get('networkdata')
+        self.network_json = results.get("networkdata")
         return True
 
     def check_instance_id(self, sys_cfg):
@@ -156,7 +166,8 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
             if self.network_json not in (None, sources.UNSET):
                 LOG.debug("network config provided via network_json")
                 self._network_config = openstack.convert_net_json(
-                    self.network_json, known_macs=self.known_macs)
+                    self.network_json, known_macs=self.known_macs
+                )
             elif self.network_eni is not None:
                 self._network_config = eni.convert_eni_data(self.network_eni)
                 LOG.debug("network config provided via converted eni data")
@@ -166,15 +177,15 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
 
     @property
     def platform(self):
-        return 'openstack'
+        return "openstack"
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        if self.source.startswith('/dev'):
-            subplatform_type = 'config-disk'
+        if self.source.startswith("/dev"):
+            subplatform_type = "config-disk"
         else:
-            subplatform_type = 'seed-dir'
-        return '%s (%s)' % (subplatform_type, self.source)
+            subplatform_type = "seed-dir"
+        return "%s (%s)" % (subplatform_type, self.source)
 
 
 def read_config_drive(source_dir):
@@ -196,7 +207,7 @@ def get_previous_iid(paths):
     # interestingly, for this purpose the "previous" instance-id is the current
     # instance-id.  cloud-init hasn't moved them over yet as this datasource
     # hasn't declared itself found.
-    fname = os.path.join(paths.get_cpath('data'), 'instance-id')
+    fname = os.path.join(paths.get_cpath("data"), "instance-id")
     try:
         return util.load_file(fname).rstrip("\n")
     except IOError:
@@ -206,14 +217,15 @@ def get_previous_iid(paths):
 def on_first_boot(data, distro=None, network=True):
     """Performs any first-boot actions using data read from a config-drive."""
     if not isinstance(data, dict):
-        raise TypeError("Config-drive data expected to be a dict; not %s"
-                        % (type(data)))
+        raise TypeError(
+            "Config-drive data expected to be a dict; not %s" % (type(data))
+        )
     if network:
-        net_conf = data.get("network_config", '')
+        net_conf = data.get("network_config", "")
         if net_conf and distro:
             LOG.warning("Updating network interfaces from config drive")
             distro.apply_network_config(eni.convert_eni_data(net_conf))
-    write_injected_files(data.get('files'))
+    write_injected_files(data.get("files"))
 
 
 def write_injected_files(files):
@@ -270,12 +282,13 @@ def find_candidate_devs(probe_optical=True, dslist=None):
 
     # combine list of items by putting by-label items first
     # followed by fstype items, but with dupes removed
-    candidates = (by_label + [d for d in by_fstype if d not in by_label])
+    candidates = by_label + [d for d in by_fstype if d not in by_label]
 
     # We are looking for a block device or partition with necessary label or
     # an unpartitioned block device (ex sda, not sda1)
-    devices = [d for d in candidates
-               if d in by_label or not util.is_partition(d)]
+    devices = [
+        d for d in candidates if d in by_label or not util.is_partition(d)
+    ]
 
     LOG.debug("devices=%s dslist=%s", devices, dslist)
     if devices and "IBMCloud" in dslist:
@@ -283,8 +296,11 @@ def find_candidate_devs(probe_optical=True, dslist=None):
         ibm_platform, ibm_path = get_ibm_platform()
         if ibm_path in devices:
             devices.remove(ibm_path)
-            LOG.debug("IBMCloud device '%s' (%s) removed from candidate list",
-                      ibm_path, ibm_platform)
+            LOG.debug(
+                "IBMCloud device '%s' (%s) removed from candidate list",
+                ibm_path,
+                ibm_platform,
+            )
 
     return devices
 
@@ -302,4 +318,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceDigitalOcean.py b/cloudinit/sources/DataSourceDigitalOcean.py
index 08805d99..52d3ad26 100644
--- a/cloudinit/sources/DataSourceDigitalOcean.py
+++ b/cloudinit/sources/DataSourceDigitalOcean.py
@@ -6,16 +6,14 @@
 # DigitalOcean Droplet API:
 # https://developers.digitalocean.com/documentation/metadata/
 
-from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import util
-
 import cloudinit.sources.helpers.digitalocean as do_helper
+from cloudinit import log as logging
+from cloudinit import sources, util
 
 LOG = logging.getLogger(__name__)
 
 BUILTIN_DS_CONFIG = {
-    'metadata_url': 'http://169.254.169.254/metadata/v1.json',
+    "metadata_url": "http://169.254.169.254/metadata/v1.json",
 }
 
 # Wait for a up to a minute, retrying the meta-data server
@@ -28,20 +26,25 @@ MD_USE_IPV4LL = True
 
 class DataSourceDigitalOcean(sources.DataSource):
 
-    dsname = 'DigitalOcean'
+    dsname = "DigitalOcean"
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
         self.distro = distro
         self.metadata = dict()
-        self.ds_cfg = util.mergemanydict([
-            util.get_cfg_by_path(sys_cfg, ["datasource", "DigitalOcean"], {}),
-            BUILTIN_DS_CONFIG])
-        self.metadata_address = self.ds_cfg['metadata_url']
-        self.retries = self.ds_cfg.get('retries', MD_RETRIES)
-        self.timeout = self.ds_cfg.get('timeout', MD_TIMEOUT)
-        self.use_ip4LL = self.ds_cfg.get('use_ip4LL', MD_USE_IPV4LL)
-        self.wait_retry = self.ds_cfg.get('wait_retry', MD_WAIT_RETRY)
+        self.ds_cfg = util.mergemanydict(
+            [
+                util.get_cfg_by_path(
+                    sys_cfg, ["datasource", "DigitalOcean"], {}
+                ),
+                BUILTIN_DS_CONFIG,
+            ]
+        )
+        self.metadata_address = self.ds_cfg["metadata_url"]
+        self.retries = self.ds_cfg.get("retries", MD_RETRIES)
+        self.timeout = self.ds_cfg.get("timeout", MD_TIMEOUT)
+        self.use_ip4LL = self.ds_cfg.get("use_ip4LL", MD_USE_IPV4LL)
+        self.wait_retry = self.ds_cfg.get("wait_retry", MD_WAIT_RETRY)
         self._network_config = None
 
     def _get_sysinfo(self):
@@ -61,15 +64,18 @@ class DataSourceDigitalOcean(sources.DataSource):
             ipv4LL_nic = do_helper.assign_ipv4_link_local(self.distro)
 
         md = do_helper.read_metadata(
-            self.metadata_address, timeout=self.timeout,
-            sec_between=self.wait_retry, retries=self.retries)
+            self.metadata_address,
+            timeout=self.timeout,
+            sec_between=self.wait_retry,
+            retries=self.retries,
+        )
 
         self.metadata_full = md
-        self.metadata['instance-id'] = md.get('droplet_id', droplet_id)
-        self.metadata['local-hostname'] = md.get('hostname', droplet_id)
-        self.metadata['interfaces'] = md.get('interfaces')
-        self.metadata['public-keys'] = md.get('public_keys')
-        self.metadata['availability_zone'] = md.get('region', 'default')
+        self.metadata["instance-id"] = md.get("droplet_id", droplet_id)
+        self.metadata["local-hostname"] = md.get("hostname", droplet_id)
+        self.metadata["interfaces"] = md.get("interfaces")
+        self.metadata["public-keys"] = md.get("public_keys")
+        self.metadata["availability_zone"] = md.get("region", "default")
         self.vendordata_raw = md.get("vendor_data", None)
         self.userdata_raw = md.get("user_data", None)
 
@@ -80,32 +86,34 @@ class DataSourceDigitalOcean(sources.DataSource):
 
     def check_instance_id(self, sys_cfg):
         return sources.instance_id_matches_system_uuid(
-            self.get_instance_id(), 'system-serial-number')
+            self.get_instance_id(), "system-serial-number"
+        )
 
     @property
     def network_config(self):
         """Configure the networking. This needs to be done each boot, since
-           the IP information may have changed due to snapshot and/or
-           migration.
+        the IP information may have changed due to snapshot and/or
+        migration.
         """
 
         if self._network_config:
             return self._network_config
 
-        interfaces = self.metadata.get('interfaces')
+        interfaces = self.metadata.get("interfaces")
         LOG.debug(interfaces)
         if not interfaces:
             raise Exception("Unable to get meta-data from server....")
 
-        nameservers = self.metadata_full['dns']['nameservers']
+        nameservers = self.metadata_full["dns"]["nameservers"]
         self._network_config = do_helper.convert_network_configuration(
-            interfaces, nameservers)
+            interfaces, nameservers
+        )
         return self._network_config
 
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceDigitalOcean, (sources.DEP_FILESYSTEM, )),
+    (DataSourceDigitalOcean, (sources.DEP_FILESYSTEM,)),
 ]
 
 
@@ -113,4 +121,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceEc2.py b/cloudinit/sources/DataSourceEc2.py
index 700437b0..03b3870c 100644
--- a/cloudinit/sources/DataSourceEc2.py
+++ b/cloudinit/sources/DataSourceEc2.py
@@ -15,13 +15,11 @@ import time
 from cloudinit import dmi
 from cloudinit import ec2_utils as ec2
 from cloudinit import log as logging
-from cloudinit import net
-from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError
-from cloudinit import sources
+from cloudinit import net, sources
 from cloudinit import url_helper as uhelp
-from cloudinit import util
-from cloudinit import warnings
+from cloudinit import util, warnings
 from cloudinit.event import EventScope, EventType
+from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError
 
 LOG = logging.getLogger(__name__)
 
@@ -30,10 +28,10 @@ SKIP_METADATA_URL_CODES = frozenset([uhelp.NOT_FOUND])
 STRICT_ID_PATH = ("datasource", "Ec2", "strict_id")
 STRICT_ID_DEFAULT = "warn"
 
-API_TOKEN_ROUTE = 'latest/api/token'
-AWS_TOKEN_TTL_SECONDS = '21600'
-AWS_TOKEN_PUT_HEADER = 'X-aws-ec2-metadata-token'
-AWS_TOKEN_REQ_HEADER = AWS_TOKEN_PUT_HEADER + '-ttl-seconds'
+API_TOKEN_ROUTE = "latest/api/token"
+AWS_TOKEN_TTL_SECONDS = "21600"
+AWS_TOKEN_PUT_HEADER = "X-aws-ec2-metadata-token"
+AWS_TOKEN_REQ_HEADER = AWS_TOKEN_PUT_HEADER + "-ttl-seconds"
 AWS_TOKEN_REDACT = [AWS_TOKEN_PUT_HEADER, AWS_TOKEN_REQ_HEADER]
 
 
@@ -53,18 +51,18 @@ class CloudNames(object):
 
 class DataSourceEc2(sources.DataSource):
 
-    dsname = 'Ec2'
+    dsname = "Ec2"
     # Default metadata urls that will be used if none are provided
     # They will be checked for 'resolveability' and some of the
     # following may be discarded if they do not resolve
     metadata_urls = ["http://169.254.169.254", "http://instance-data.:8773"]
 
     # The minimum supported metadata_version from the ec2 metadata apis
-    min_metadata_version = '2009-04-04'
+    min_metadata_version = "2009-04-04"
 
     # Priority ordered list of additional metadata versions which will be tried
     # for extended metadata content. IPv6 support comes in 2016-09-02
-    extended_metadata_versions = ['2018-09-24', '2016-09-02']
+    extended_metadata_versions = ["2018-09-24", "2016-09-02"]
 
     # Setup read_url parameters per get_url_params.
     url_max_wait = 120
@@ -76,12 +74,14 @@ class DataSourceEc2(sources.DataSource):
     # Whether we want to get network configuration from the metadata service.
     perform_dhcp_setup = False
 
-    supported_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-        EventType.BOOT,
-        EventType.BOOT_LEGACY,
-        EventType.HOTPLUG,
-    }}
+    supported_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+            EventType.BOOT,
+            EventType.BOOT_LEGACY,
+            EventType.HOTPLUG,
+        }
+    }
 
     def __init__(self, sys_cfg, distro, paths):
         super(DataSourceEc2, self).__init__(sys_cfg, distro, paths)
@@ -93,11 +93,18 @@ class DataSourceEc2(sources.DataSource):
 
     def _get_data(self):
         strict_mode, _sleep = read_strict_mode(
-            util.get_cfg_by_path(self.sys_cfg, STRICT_ID_PATH,
-                                 STRICT_ID_DEFAULT), ("warn", None))
-
-        LOG.debug("strict_mode: %s, cloud_name=%s cloud_platform=%s",
-                  strict_mode, self.cloud_name, self.platform)
+            util.get_cfg_by_path(
+                self.sys_cfg, STRICT_ID_PATH, STRICT_ID_DEFAULT
+            ),
+            ("warn", None),
+        )
+
+        LOG.debug(
+            "strict_mode: %s, cloud_name=%s cloud_platform=%s",
+            strict_mode,
+            self.cloud_name,
+            self.platform,
+        )
         if strict_mode == "true" and self.cloud_name == CloudNames.UNKNOWN:
             return False
         elif self.cloud_name == CloudNames.NO_EC2_METADATA:
@@ -110,20 +117,27 @@ class DataSourceEc2(sources.DataSource):
             try:
                 with EphemeralDHCPv4(self.fallback_interface):
                     self._crawled_metadata = util.log_time(
-                        logfunc=LOG.debug, msg='Crawl of metadata service',
-                        func=self.crawl_metadata)
+                        logfunc=LOG.debug,
+                        msg="Crawl of metadata service",
+                        func=self.crawl_metadata,
+                    )
             except NoDHCPLeaseError:
                 return False
         else:
             self._crawled_metadata = util.log_time(
-                logfunc=LOG.debug, msg='Crawl of metadata service',
-                func=self.crawl_metadata)
+                logfunc=LOG.debug,
+                msg="Crawl of metadata service",
+                func=self.crawl_metadata,
+            )
         if not self._crawled_metadata:
             return False
-        self.metadata = self._crawled_metadata.get('meta-data', None)
-        self.userdata_raw = self._crawled_metadata.get('user-data', None)
-        self.identity = self._crawled_metadata.get(
-            'dynamic', {}).get('instance-identity', {}).get('document', {})
+        self.metadata = self._crawled_metadata.get("meta-data", None)
+        self.userdata_raw = self._crawled_metadata.get("user-data", None)
+        self.identity = (
+            self._crawled_metadata.get("dynamic", {})
+            .get("instance-identity", {})
+            .get("document", {})
+        )
         return True
 
     def is_classic_instance(self):
@@ -133,9 +147,9 @@ class DataSourceEc2(sources.DataSource):
             # network_config where metadata will be present.
             # Secondary call site is in packaging postinst script.
             return False
-        ifaces_md = self.metadata.get('network', {}).get('interfaces', {})
-        for _mac, mac_data in ifaces_md.get('macs', {}).items():
-            if 'vpc-id' in mac_data:
+        ifaces_md = self.metadata.get("network", {}).get("interfaces", {})
+        for _mac, mac_data in ifaces_md.get("macs", {}).items():
+            if "vpc-id" in mac_data:
                 return False
         return True
 
@@ -143,12 +157,12 @@ class DataSourceEc2(sources.DataSource):
     def launch_index(self):
         if not self.metadata:
             return None
-        return self.metadata.get('ami-launch-index')
+        return self.metadata.get("ami-launch-index")
 
     @property
     def platform(self):
         # Handle upgrade path of pickled ds
-        if not hasattr(self, '_platform_type'):
+        if not hasattr(self, "_platform_type"):
             self._platform_type = DataSourceEc2.dsname.lower()
         if not self._platform_type:
             self._platform_type = DataSourceEc2.dsname.lower()
@@ -164,44 +178,47 @@ class DataSourceEc2(sources.DataSource):
         min_metadata_version.
         """
         # Assumes metadata service is already up
-        url_tmpl = '{0}/{1}/meta-data/instance-id'
+        url_tmpl = "{0}/{1}/meta-data/instance-id"
         headers = self._get_headers()
         for api_ver in self.extended_metadata_versions:
             url = url_tmpl.format(self.metadata_address, api_ver)
             try:
-                resp = uhelp.readurl(url=url, headers=headers,
-                                     headers_redact=AWS_TOKEN_REDACT)
+                resp = uhelp.readurl(
+                    url=url, headers=headers, headers_redact=AWS_TOKEN_REDACT
+                )
             except uhelp.UrlError as e:
-                LOG.debug('url %s raised exception %s', url, e)
+                LOG.debug("url %s raised exception %s", url, e)
             else:
                 if resp.code == 200:
-                    LOG.debug('Found preferred metadata version %s', api_ver)
+                    LOG.debug("Found preferred metadata version %s", api_ver)
                     return api_ver
                 elif resp.code == 404:
-                    msg = 'Metadata api version %s not present. Headers: %s'
+                    msg = "Metadata api version %s not present. Headers: %s"
                     LOG.debug(msg, api_ver, resp.headers)
         return self.min_metadata_version
 
     def get_instance_id(self):
         if self.cloud_name == CloudNames.AWS:
             # Prefer the ID from the instance identity document, but fall back
-            if not getattr(self, 'identity', None):
+            if not getattr(self, "identity", None):
                 # If re-using cached datasource, it's get_data run didn't
                 # setup self.identity. So we need to do that now.
                 api_version = self.get_metadata_api_version()
                 self.identity = ec2.get_instance_identity(
-                    api_version, self.metadata_address,
+                    api_version,
+                    self.metadata_address,
                     headers_cb=self._get_headers,
                     headers_redact=AWS_TOKEN_REDACT,
-                    exception_cb=self._refresh_stale_aws_token_cb).get(
-                        'document', {})
+                    exception_cb=self._refresh_stale_aws_token_cb,
+                ).get("document", {})
             return self.identity.get(
-                'instanceId', self.metadata['instance-id'])
+                "instanceId", self.metadata["instance-id"]
+            )
         else:
-            return self.metadata['instance-id']
+            return self.metadata["instance-id"]
 
     def _maybe_fetch_api_token(self, mdurls, timeout=None, max_wait=None):
-        """ Get an API token for EC2 Instance Metadata Service.
+        """Get an API token for EC2 Instance Metadata Service.
 
         On EC2. IMDS will always answer an API token, unless
         the instance owner has disabled the IMDS HTTP endpoint or
@@ -213,26 +230,29 @@ class DataSourceEc2(sources.DataSource):
         urls = []
         url2base = {}
         url_path = API_TOKEN_ROUTE
-        request_method = 'PUT'
+        request_method = "PUT"
         for url in mdurls:
-            cur = '{0}/{1}'.format(url, url_path)
+            cur = "{0}/{1}".format(url, url_path)
             urls.append(cur)
             url2base[cur] = url
 
         # use the self._imds_exception_cb to check for Read errors
-        LOG.debug('Fetching Ec2 IMDSv2 API Token')
+        LOG.debug("Fetching Ec2 IMDSv2 API Token")
 
         response = None
         url = None
         url_params = self.get_url_params()
         try:
             url, response = uhelp.wait_for_url(
-                urls=urls, max_wait=url_params.max_wait_seconds,
-                timeout=url_params.timeout_seconds, status_cb=LOG.warning,
+                urls=urls,
+                max_wait=url_params.max_wait_seconds,
+                timeout=url_params.timeout_seconds,
+                status_cb=LOG.warning,
                 headers_cb=self._get_headers,
                 exception_cb=self._imds_exception_cb,
                 request_method=request_method,
-                headers_redact=AWS_TOKEN_REDACT)
+                headers_redact=AWS_TOKEN_REDACT,
+            )
         except uhelp.UrlError:
             # We use the raised exception to interupt the retry loop.
             # Nothing else to do here.
@@ -258,8 +278,10 @@ class DataSourceEc2(sources.DataSource):
         filtered = [x for x in mdurls if util.is_resolvable_url(x)]
 
         if set(filtered) != set(mdurls):
-            LOG.debug("Removed the following from metadata urls: %s",
-                      list((set(mdurls) - set(filtered))))
+            LOG.debug(
+                "Removed the following from metadata urls: %s",
+                list((set(mdurls) - set(filtered))),
+            )
 
         if len(filtered):
             mdurls = filtered
@@ -277,20 +299,25 @@ class DataSourceEc2(sources.DataSource):
             # if we can't get a token, use instance-id path
             urls = []
             url2base = {}
-            url_path = '{ver}/meta-data/instance-id'.format(
-                ver=self.min_metadata_version)
-            request_method = 'GET'
+            url_path = "{ver}/meta-data/instance-id".format(
+                ver=self.min_metadata_version
+            )
+            request_method = "GET"
             for url in mdurls:
-                cur = '{0}/{1}'.format(url, url_path)
+                cur = "{0}/{1}".format(url, url_path)
                 urls.append(cur)
                 url2base[cur] = url
 
             start_time = time.time()
             url, _ = uhelp.wait_for_url(
-                urls=urls, max_wait=url_params.max_wait_seconds,
-                timeout=url_params.timeout_seconds, status_cb=LOG.warning,
-                headers_redact=AWS_TOKEN_REDACT, headers_cb=self._get_headers,
-                request_method=request_method)
+                urls=urls,
+                max_wait=url_params.max_wait_seconds,
+                timeout=url_params.timeout_seconds,
+                status_cb=LOG.warning,
+                headers_redact=AWS_TOKEN_REDACT,
+                headers_cb=self._get_headers,
+                request_method=request_method,
+            )
 
             if url:
                 metadata_address = url2base[url]
@@ -301,8 +328,11 @@ class DataSourceEc2(sources.DataSource):
         elif self.cloud_name == CloudNames.AWS:
             LOG.warning("IMDS's HTTP endpoint is probably disabled")
         else:
-            LOG.critical("Giving up on md from %s after %s seconds",
-                         urls, int(time.time() - start_time))
+            LOG.critical(
+                "Giving up on md from %s after %s seconds",
+                urls,
+                int(time.time() - start_time),
+            )
 
         return bool(metadata_address)
 
@@ -310,7 +340,7 @@ class DataSourceEc2(sources.DataSource):
         # Consult metadata service, that has
         #  ephemeral0: sdb
         # and return 'sdb' for input 'ephemeral0'
-        if 'block-device-mapping' not in self.metadata:
+        if "block-device-mapping" not in self.metadata:
             return None
 
         # Example:
@@ -319,7 +349,7 @@ class DataSourceEc2(sources.DataSource):
         # 'ephemeral0': '/dev/sdb',
         # 'root': '/dev/sda1'}
         found = None
-        bdm = self.metadata['block-device-mapping']
+        bdm = self.metadata["block-device-mapping"]
         if not isinstance(bdm, dict):
             LOG.debug("block-device-mapping not a dictionary: '%s'", bdm)
             return None
@@ -362,17 +392,18 @@ class DataSourceEc2(sources.DataSource):
         try:
             if self.cloud_name == CloudNames.AWS:
                 return self.identity.get(
-                    'availabilityZone',
-                    self.metadata['placement']['availability-zone'])
+                    "availabilityZone",
+                    self.metadata["placement"]["availability-zone"],
+                )
             else:
-                return self.metadata['placement']['availability-zone']
+                return self.metadata["placement"]["availability-zone"]
         except KeyError:
             return None
 
     @property
     def region(self):
         if self.cloud_name == CloudNames.AWS:
-            region = self.identity.get('region')
+            region = self.identity.get("region")
             # Fallback to trimming the availability zone if region is missing
             if self.availability_zone and not region:
                 region = self.availability_zone[:-1]
@@ -389,7 +420,8 @@ class DataSourceEc2(sources.DataSource):
         if self.cloud_name == CloudNames.UNKNOWN:
             warn_if_necessary(
                 util.get_cfg_by_path(cfg, STRICT_ID_PATH, STRICT_ID_DEFAULT),
-                cfg)
+                cfg,
+            )
 
     @property
     def network_config(self):
@@ -400,30 +432,39 @@ class DataSourceEc2(sources.DataSource):
         if self.metadata is None:
             # this would happen if get_data hadn't been called. leave as UNSET
             LOG.warning(
-                "Unexpected call to network_config when metadata is None.")
+                "Unexpected call to network_config when metadata is None."
+            )
             return None
 
         result = None
         no_network_metadata_on_aws = bool(
-            'network' not in self.metadata and
-            self.cloud_name == CloudNames.AWS)
+            "network" not in self.metadata
+            and self.cloud_name == CloudNames.AWS
+        )
         if no_network_metadata_on_aws:
-            LOG.debug("Metadata 'network' not present:"
-                      " Refreshing stale metadata from prior to upgrade.")
+            LOG.debug(
+                "Metadata 'network' not present:"
+                " Refreshing stale metadata from prior to upgrade."
+            )
             util.log_time(
-                logfunc=LOG.debug, msg='Re-crawl of metadata service',
-                func=self.get_data)
+                logfunc=LOG.debug,
+                msg="Re-crawl of metadata service",
+                func=self.get_data,
+            )
 
         iface = self.fallback_interface
-        net_md = self.metadata.get('network')
+        net_md = self.metadata.get("network")
         if isinstance(net_md, dict):
             # SRU_BLOCKER: xenial, bionic and eoan should default
             # apply_full_imds_network_config to False to retain original
             # behavior on those releases.
             result = convert_ec2_metadata_network_config(
-                net_md, fallback_nic=iface,
+                net_md,
+                fallback_nic=iface,
                 full_network_config=util.get_cfg_option_bool(
-                    self.ds_cfg, 'apply_full_imds_network_config', True))
+                    self.ds_cfg, "apply_full_imds_network_config", True
+                ),
+            )
 
             # RELEASE_BLOCKER: xenial should drop the below if statement,
             # because the issue being addressed doesn't exist pre-netplan.
@@ -435,11 +476,14 @@ class DataSourceEc2(sources.DataSource):
             # network config file every boot due to MAC address change.
             if self.is_classic_instance():
                 self.default_update_events = copy.deepcopy(
-                    self.default_update_events)
+                    self.default_update_events
+                )
                 self.default_update_events[EventScope.NETWORK].add(
-                    EventType.BOOT)
+                    EventType.BOOT
+                )
                 self.default_update_events[EventScope.NETWORK].add(
-                    EventType.BOOT_LEGACY)
+                    EventType.BOOT_LEGACY
+                )
         else:
             LOG.warning("Metadata 'network' key not valid: %s.", net_md)
         self._network_config = result
@@ -451,7 +495,7 @@ class DataSourceEc2(sources.DataSource):
         if self._fallback_interface is None:
             # fallback_nic was used at one point, so restored objects may
             # have an attribute there. respect that if found.
-            _legacy_fbnic = getattr(self, 'fallback_nic', None)
+            _legacy_fbnic = getattr(self, "fallback_nic", None)
             if _legacy_fbnic:
                 self._fallback_interface = _legacy_fbnic
                 self.fallback_nic = None
@@ -476,26 +520,37 @@ class DataSourceEc2(sources.DataSource):
         else:
             exc_cb = exc_cb_ud = None
         try:
-            crawled_metadata['user-data'] = ec2.get_instance_userdata(
-                api_version, self.metadata_address,
-                headers_cb=self._get_headers, headers_redact=redact,
-                exception_cb=exc_cb_ud)
-            crawled_metadata['meta-data'] = ec2.get_instance_metadata(
-                api_version, self.metadata_address,
-                headers_cb=self._get_headers, headers_redact=redact,
-                exception_cb=exc_cb)
+            crawled_metadata["user-data"] = ec2.get_instance_userdata(
+                api_version,
+                self.metadata_address,
+                headers_cb=self._get_headers,
+                headers_redact=redact,
+                exception_cb=exc_cb_ud,
+            )
+            crawled_metadata["meta-data"] = ec2.get_instance_metadata(
+                api_version,
+                self.metadata_address,
+                headers_cb=self._get_headers,
+                headers_redact=redact,
+                exception_cb=exc_cb,
+            )
             if self.cloud_name == CloudNames.AWS:
                 identity = ec2.get_instance_identity(
-                    api_version, self.metadata_address,
-                    headers_cb=self._get_headers, headers_redact=redact,
-                    exception_cb=exc_cb)
-                crawled_metadata['dynamic'] = {'instance-identity': identity}
+                    api_version,
+                    self.metadata_address,
+                    headers_cb=self._get_headers,
+                    headers_redact=redact,
+                    exception_cb=exc_cb,
+                )
+                crawled_metadata["dynamic"] = {"instance-identity": identity}
         except Exception:
             util.logexc(
-                LOG, "Failed reading from metadata address %s",
-                self.metadata_address)
+                LOG,
+                "Failed reading from metadata address %s",
+                self.metadata_address,
+            )
             return {}
-        crawled_metadata['_metadata_api_version'] = api_version
+        crawled_metadata["_metadata_api_version"] = api_version
         return crawled_metadata
 
     def _refresh_api_token(self, seconds=AWS_TOKEN_TTL_SECONDS):
@@ -508,23 +563,27 @@ class DataSourceEc2(sources.DataSource):
             return None
         LOG.debug("Refreshing Ec2 metadata API token")
         request_header = {AWS_TOKEN_REQ_HEADER: seconds}
-        token_url = '{}/{}'.format(self.metadata_address, API_TOKEN_ROUTE)
+        token_url = "{}/{}".format(self.metadata_address, API_TOKEN_ROUTE)
         try:
-            response = uhelp.readurl(token_url, headers=request_header,
-                                     headers_redact=AWS_TOKEN_REDACT,
-                                     request_method="PUT")
+            response = uhelp.readurl(
+                token_url,
+                headers=request_header,
+                headers_redact=AWS_TOKEN_REDACT,
+                request_method="PUT",
+            )
         except uhelp.UrlError as e:
             LOG.warning(
-                'Unable to get API token: %s raised exception %s',
-                token_url, e)
+                "Unable to get API token: %s raised exception %s", token_url, e
+            )
             return None
         return response.contents
 
     def _skip_or_refresh_stale_aws_token_cb(self, msg, exception):
         """Callback will not retry on SKIP_USERDATA_CODES or if no token
-           is available."""
+        is available."""
         retry = ec2.skip_retry_on_codes(
-            ec2.SKIP_USERDATA_CODES, msg, exception)
+            ec2.SKIP_USERDATA_CODES, msg, exception
+        )
         if not retry:
             return False  # False raises exception
         return self._refresh_stale_aws_token_cb(msg, exception)
@@ -554,14 +613,17 @@ class DataSourceEc2(sources.DataSource):
             # requests.ConnectionError will have exception.code == None
             if exception.code and exception.code >= 400:
                 if exception.code == 403:
-                    LOG.warning('Ec2 IMDS endpoint returned a 403 error. '
-                                'HTTP endpoint is disabled. Aborting.')
+                    LOG.warning(
+                        "Ec2 IMDS endpoint returned a 403 error. "
+                        "HTTP endpoint is disabled. Aborting."
+                    )
                 else:
-                    LOG.warning('Fatal error while requesting '
-                                'Ec2 IMDSv2 API tokens')
+                    LOG.warning(
+                        "Fatal error while requesting Ec2 IMDSv2 API tokens"
+                    )
                 raise exception
 
-    def _get_headers(self, url=''):
+    def _get_headers(self, url=""):
         """Return a dict of headers for accessing a url.
 
         If _api_token is unset on AWS, attempt to refresh the token via a PUT
@@ -591,13 +653,17 @@ class DataSourceEc2Local(DataSourceEc2):
     metadata service. If the metadata service provides network configuration
     then render the network configuration for that instance based on metadata.
     """
+
     perform_dhcp_setup = True  # Use dhcp before querying metadata
 
     def get_data(self):
         supported_platforms = (CloudNames.AWS,)
         if self.cloud_name not in supported_platforms:
-            LOG.debug("Local Ec2 mode only supported on %s, not %s",
-                      supported_platforms, self.cloud_name)
+            LOG.debug(
+                "Local Ec2 mode only supported on %s, not %s",
+                supported_platforms,
+                self.cloud_name,
+            )
             return False
         return super(DataSourceEc2Local, self).get_data()
 
@@ -615,18 +681,19 @@ def parse_strict_mode(cfgval):
     #    true, false, warn,[sleep]
     # return tuple with string mode (true|false|warn) and sleep.
     if cfgval is True:
-        return 'true', None
+        return "true", None
     if cfgval is False:
-        return 'false', None
+        return "false", None
 
     if not cfgval:
-        return 'warn', 0
+        return "warn", 0
 
     mode, _, sleep = cfgval.partition(",")
-    if mode not in ('true', 'false', 'warn'):
+    if mode not in ("true", "false", "warn"):
         raise ValueError(
             "Invalid mode '%s' in strict_id setting '%s': "
-            "Expected one of 'true', 'false', 'warn'." % (mode, cfgval))
+            "Expected one of 'true', 'false', 'warn'." % (mode, cfgval)
+        )
 
     if sleep:
         try:
@@ -652,47 +719,53 @@ def warn_if_necessary(cfgval, cfg):
     if mode == "false":
         return
 
-    warnings.show_warning('non_ec2_md', cfg, mode=True, sleep=sleep)
+    warnings.show_warning("non_ec2_md", cfg, mode=True, sleep=sleep)
 
 
 def identify_aws(data):
     # data is a dictionary returned by _collect_platform_data.
-    if (data['uuid'].startswith('ec2') and
-            (data['uuid_source'] == 'hypervisor' or
-             data['uuid'] == data['serial'])):
+    if data["uuid"].startswith("ec2") and (
+        data["uuid_source"] == "hypervisor" or data["uuid"] == data["serial"]
+    ):
         return CloudNames.AWS
 
     return None
 
 
 def identify_brightbox(data):
-    if data['serial'].endswith('.brightbox.com'):
+    if data["serial"].endswith(".brightbox.com"):
         return CloudNames.BRIGHTBOX
 
 
 def identify_zstack(data):
-    if data['asset_tag'].endswith('.zstack.io'):
+    if data["asset_tag"].endswith(".zstack.io"):
         return CloudNames.ZSTACK
 
 
 def identify_e24cloud(data):
-    if data['vendor'] == 'e24cloud':
+    if data["vendor"] == "e24cloud":
         return CloudNames.E24CLOUD
 
 
 def identify_platform():
     # identify the platform and return an entry in CloudNames.
     data = _collect_platform_data()
-    checks = (identify_aws, identify_brightbox, identify_zstack,
-              identify_e24cloud, lambda x: CloudNames.UNKNOWN)
+    checks = (
+        identify_aws,
+        identify_brightbox,
+        identify_zstack,
+        identify_e24cloud,
+        lambda x: CloudNames.UNKNOWN,
+    )
     for checker in checks:
         try:
             result = checker(data)
             if result:
                 return result
         except Exception as e:
-            LOG.warning("calling %s with %s raised exception: %s",
-                        checker, data, e)
+            LOG.warning(
+                "calling %s with %s raised exception: %s", checker, data, e
+            )
 
 
 def _collect_platform_data():
@@ -711,36 +784,36 @@ def _collect_platform_data():
     data = {}
     try:
         uuid = util.load_file("/sys/hypervisor/uuid").strip()
-        data['uuid_source'] = 'hypervisor'
+        data["uuid_source"] = "hypervisor"
     except Exception:
-        uuid = dmi.read_dmi_data('system-uuid')
-        data['uuid_source'] = 'dmi'
+        uuid = dmi.read_dmi_data("system-uuid")
+        data["uuid_source"] = "dmi"
 
     if uuid is None:
-        uuid = ''
-    data['uuid'] = uuid.lower()
+        uuid = ""
+    data["uuid"] = uuid.lower()
 
-    serial = dmi.read_dmi_data('system-serial-number')
+    serial = dmi.read_dmi_data("system-serial-number")
     if serial is None:
-        serial = ''
+        serial = ""
 
-    data['serial'] = serial.lower()
+    data["serial"] = serial.lower()
 
-    asset_tag = dmi.read_dmi_data('chassis-asset-tag')
+    asset_tag = dmi.read_dmi_data("chassis-asset-tag")
     if asset_tag is None:
-        asset_tag = ''
+        asset_tag = ""
 
-    data['asset_tag'] = asset_tag.lower()
+    data["asset_tag"] = asset_tag.lower()
 
-    vendor = dmi.read_dmi_data('system-manufacturer')
-    data['vendor'] = (vendor if vendor else '').lower()
+    vendor = dmi.read_dmi_data("system-manufacturer")
+    data["vendor"] = (vendor if vendor else "").lower()
 
     return data
 
 
 def convert_ec2_metadata_network_config(
-        network_md, macs_to_nics=None, fallback_nic=None,
-        full_network_config=True):
+    network_md, macs_to_nics=None, fallback_nic=None, full_network_config=True
+):
     """Convert ec2 metadata to network config version 2 data dict.
 
     @param: network_md: 'network' portion of EC2 metadata.
@@ -759,23 +832,25 @@ def convert_ec2_metadata_network_config(
 
     @return A dict of network config version 2 based on the metadata and macs.
     """
-    netcfg = {'version': 2, 'ethernets': {}}
+    netcfg = {"version": 2, "ethernets": {}}
     if not macs_to_nics:
         macs_to_nics = net.get_interfaces_by_mac()
-    macs_metadata = network_md['interfaces']['macs']
+    macs_metadata = network_md["interfaces"]["macs"]
 
     if not full_network_config:
         for mac, nic_name in macs_to_nics.items():
             if nic_name == fallback_nic:
                 break
-        dev_config = {'dhcp4': True,
-                      'dhcp6': False,
-                      'match': {'macaddress': mac.lower()},
-                      'set-name': nic_name}
+        dev_config = {
+            "dhcp4": True,
+            "dhcp6": False,
+            "match": {"macaddress": mac.lower()},
+            "set-name": nic_name,
+        }
         nic_metadata = macs_metadata.get(mac)
-        if nic_metadata.get('ipv6s'):  # Any IPv6 addresses configured
-            dev_config['dhcp6'] = True
-        netcfg['ethernets'][nic_name] = dev_config
+        if nic_metadata.get("ipv6s"):  # Any IPv6 addresses configured
+            dev_config["dhcp6"] = True
+        netcfg["ethernets"][nic_name] = dev_config
         return netcfg
     # Apply network config for all nics and any secondary IPv4/v6 addresses
     nic_idx = 0
@@ -785,24 +860,27 @@ def convert_ec2_metadata_network_config(
             continue  # Not a physical nic represented in metadata
         # device-number is zero-indexed, we want it 1-indexed for the
         # multiplication on the following line
-        nic_idx = int(nic_metadata.get('device-number', nic_idx)) + 1
-        dhcp_override = {'route-metric': nic_idx * 100}
-        dev_config = {'dhcp4': True, 'dhcp4-overrides': dhcp_override,
-                      'dhcp6': False,
-                      'match': {'macaddress': mac.lower()},
-                      'set-name': nic_name}
-        if nic_metadata.get('ipv6s'):  # Any IPv6 addresses configured
-            dev_config['dhcp6'] = True
-            dev_config['dhcp6-overrides'] = dhcp_override
-        dev_config['addresses'] = get_secondary_addresses(nic_metadata, mac)
-        if not dev_config['addresses']:
-            dev_config.pop('addresses')  # Since we found none configured
-        netcfg['ethernets'][nic_name] = dev_config
+        nic_idx = int(nic_metadata.get("device-number", nic_idx)) + 1
+        dhcp_override = {"route-metric": nic_idx * 100}
+        dev_config = {
+            "dhcp4": True,
+            "dhcp4-overrides": dhcp_override,
+            "dhcp6": False,
+            "match": {"macaddress": mac.lower()},
+            "set-name": nic_name,
+        }
+        if nic_metadata.get("ipv6s"):  # Any IPv6 addresses configured
+            dev_config["dhcp6"] = True
+            dev_config["dhcp6-overrides"] = dhcp_override
+        dev_config["addresses"] = get_secondary_addresses(nic_metadata, mac)
+        if not dev_config["addresses"]:
+            dev_config.pop("addresses")  # Since we found none configured
+        netcfg["ethernets"][nic_name] = dev_config
     # Remove route-metric dhcp overrides if only one nic configured
-    if len(netcfg['ethernets']) == 1:
-        for nic_name in netcfg['ethernets'].keys():
-            netcfg['ethernets'][nic_name].pop('dhcp4-overrides')
-            netcfg['ethernets'][nic_name].pop('dhcp6-overrides', None)
+    if len(netcfg["ethernets"]) == 1:
+        for nic_name in netcfg["ethernets"].keys():
+            netcfg["ethernets"][nic_name].pop("dhcp4-overrides")
+            netcfg["ethernets"][nic_name].pop("dhcp6-overrides", None)
     return netcfg
 
 
@@ -812,18 +890,22 @@ def get_secondary_addresses(nic_metadata, mac):
     :return: List of secondary IPv4 or IPv6 addresses to configure on the
     interface
     """
-    ipv4s = nic_metadata.get('local-ipv4s')
-    ipv6s = nic_metadata.get('ipv6s')
+    ipv4s = nic_metadata.get("local-ipv4s")
+    ipv6s = nic_metadata.get("ipv6s")
     addresses = []
     # In version < 2018-09-24 local_ipv4s or ipv6s is a str with one IP
     if bool(isinstance(ipv4s, list) and len(ipv4s) > 1):
         addresses.extend(
             _get_secondary_addresses(
-                nic_metadata, 'subnet-ipv4-cidr-block', mac, ipv4s, '24'))
+                nic_metadata, "subnet-ipv4-cidr-block", mac, ipv4s, "24"
+            )
+        )
     if bool(isinstance(ipv6s, list) and len(ipv6s) > 1):
         addresses.extend(
             _get_secondary_addresses(
-                nic_metadata, 'subnet-ipv6-cidr-block', mac, ipv6s, '128'))
+                nic_metadata, "subnet-ipv6-cidr-block", mac, ipv6s, "128"
+            )
+        )
     return sorted(addresses)
 
 
@@ -836,18 +918,22 @@ def _get_secondary_addresses(nic_metadata, cidr_key, mac, ips, default_prefix):
     addresses = []
     cidr = nic_metadata.get(cidr_key)
     prefix = default_prefix
-    if not cidr or len(cidr.split('/')) != 2:
-        ip_type = 'ipv4' if 'ipv4' in cidr_key else 'ipv6'
+    if not cidr or len(cidr.split("/")) != 2:
+        ip_type = "ipv4" if "ipv4" in cidr_key else "ipv6"
         LOG.warning(
-            'Could not parse %s %s for mac %s. %s network'
-            ' config prefix defaults to /%s',
-            cidr_key, cidr, mac, ip_type, prefix)
+            "Could not parse %s %s for mac %s. %s network"
+            " config prefix defaults to /%s",
+            cidr_key,
+            cidr,
+            mac,
+            ip_type,
+            prefix,
+        )
     else:
-        prefix = cidr.split('/')[1]
+        prefix = cidr.split("/")[1]
     # We know we have > 1 ips for in metadata for this IP type
     for ip in ips[1:]:
-        addresses.append(
-            '{ip}/{prefix}'.format(ip=ip, prefix=prefix))
+        addresses.append("{ip}/{prefix}".format(ip=ip, prefix=prefix))
     return addresses
 
 
@@ -862,4 +948,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceExoscale.py b/cloudinit/sources/DataSourceExoscale.py
index adee6d79..cc5136d7 100644
--- a/cloudinit/sources/DataSourceExoscale.py
+++ b/cloudinit/sources/DataSourceExoscale.py
@@ -5,11 +5,9 @@
 
 from cloudinit import dmi
 from cloudinit import ec2_utils as ec2
-from cloudinit import log as logging
-from cloudinit import sources
 from cloudinit import helpers
-from cloudinit import url_helper
-from cloudinit import util
+from cloudinit import log as logging
+from cloudinit import sources, url_helper, util
 
 LOG = logging.getLogger(__name__)
 
@@ -25,7 +23,7 @@ EXOSCALE_DMI_NAME = "Exoscale"
 
 class DataSourceExoscale(sources.DataSource):
 
-    dsname = 'Exoscale'
+    dsname = "Exoscale"
 
     url_max_wait = 120
 
@@ -33,12 +31,13 @@ class DataSourceExoscale(sources.DataSource):
         super(DataSourceExoscale, self).__init__(sys_cfg, distro, paths)
         LOG.debug("Initializing the Exoscale datasource")
 
-        self.metadata_url = self.ds_cfg.get('metadata_url', METADATA_URL)
-        self.api_version = self.ds_cfg.get('api_version', API_VERSION)
+        self.metadata_url = self.ds_cfg.get("metadata_url", METADATA_URL)
+        self.api_version = self.ds_cfg.get("api_version", API_VERSION)
         self.password_server_port = int(
-            self.ds_cfg.get('password_server_port', PASSWORD_SERVER_PORT))
-        self.url_timeout = self.ds_cfg.get('timeout', URL_TIMEOUT)
-        self.url_retries = self.ds_cfg.get('retries', URL_RETRIES)
+            self.ds_cfg.get("password_server_port", PASSWORD_SERVER_PORT)
+        )
+        self.url_timeout = self.ds_cfg.get("timeout", URL_TIMEOUT)
+        self.url_retries = self.ds_cfg.get("retries", URL_RETRIES)
         self.extra_config = {}
 
     def activate(self, cfg, is_new_instance):
@@ -50,23 +49,25 @@ class DataSourceExoscale(sources.DataSource):
         # a user has triggered a password reset. So calling that password
         # service generally results in no additional cloud-config.
         # TODO(Create util functions for overriding merged sys_cfg module freq)
-        mod = 'set_passwords'
-        sem_path = self.paths.get_ipath_cur('sem')
+        mod = "set_passwords"
+        sem_path = self.paths.get_ipath_cur("sem")
         sem_helper = helpers.FileSemaphores(sem_path)
-        if sem_helper.clear('config_' + mod, None):
-            LOG.debug('Overriding module set-passwords with frequency always')
+        if sem_helper.clear("config_" + mod, None):
+            LOG.debug("Overriding module set-passwords with frequency always")
 
     def wait_for_metadata_service(self):
         """Wait for the metadata service to be reachable."""
 
         metadata_url = "{}/{}/meta-data/instance-id".format(
-            self.metadata_url, self.api_version)
+            self.metadata_url, self.api_version
+        )
 
         url, _response = url_helper.wait_for_url(
             urls=[metadata_url],
             max_wait=self.url_max_wait,
             timeout=self.url_timeout,
-            status_cb=LOG.critical)
+            status_cb=LOG.critical,
+        )
 
         return bool(url)
 
@@ -78,15 +79,20 @@ class DataSourceExoscale(sources.DataSource):
         """
         metadata_ready = util.log_time(
             logfunc=LOG.info,
-            msg='waiting for the metadata service',
-            func=self.wait_for_metadata_service)
+            msg="waiting for the metadata service",
+            func=self.wait_for_metadata_service,
+        )
 
         if not metadata_ready:
             return {}
 
-        return read_metadata(self.metadata_url, self.api_version,
-                             self.password_server_port, self.url_timeout,
-                             self.url_retries)
+        return read_metadata(
+            self.metadata_url,
+            self.api_version,
+            self.password_server_port,
+            self.url_timeout,
+            self.url_retries,
+        )
 
     def _get_data(self):
         """Fetch the user data, the metadata and the VM password
@@ -100,15 +106,16 @@ class DataSourceExoscale(sources.DataSource):
 
         data = util.log_time(
             logfunc=LOG.debug,
-            msg='Crawl of metadata service',
-            func=self.crawl_metadata)
+            msg="Crawl of metadata service",
+            func=self.crawl_metadata,
+        )
 
         if not data:
             return False
 
-        self.userdata_raw = data['user-data']
-        self.metadata = data['meta-data']
-        password = data.get('password')
+        self.userdata_raw = data["user-data"]
+        self.metadata = data["meta-data"]
+        password = data.get("password")
 
         password_config = {}
         if password:
@@ -119,16 +126,17 @@ class DataSourceExoscale(sources.DataSource):
             # leave the password always disabled if no password is ever set, or
             # leave the password login enabled if we set it once.
             password_config = {
-                'ssh_pwauth': True,
-                'password': password,
-                'chpasswd': {
-                    'expire': False,
+                "ssh_pwauth": True,
+                "password": password,
+                "chpasswd": {
+                    "expire": False,
                 },
             }
 
         # builtin extra_config overrides password_config
         self.extra_config = util.mergemanydict(
-            [self.extra_config, password_config])
+            [self.extra_config, password_config]
+        )
 
         return True
 
@@ -136,8 +144,9 @@ class DataSourceExoscale(sources.DataSource):
         return self.extra_config
 
     def _is_platform_viable(self):
-        return dmi.read_dmi_data('system-product-name').startswith(
-            EXOSCALE_DMI_NAME)
+        return dmi.read_dmi_data("system-product-name").startswith(
+            EXOSCALE_DMI_NAME
+        )
 
 
 # Used to match classes to dependencies
@@ -151,28 +160,32 @@ def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
 
-def get_password(metadata_url=METADATA_URL,
-                 api_version=API_VERSION,
-                 password_server_port=PASSWORD_SERVER_PORT,
-                 url_timeout=URL_TIMEOUT,
-                 url_retries=URL_RETRIES):
+def get_password(
+    metadata_url=METADATA_URL,
+    api_version=API_VERSION,
+    password_server_port=PASSWORD_SERVER_PORT,
+    url_timeout=URL_TIMEOUT,
+    url_retries=URL_RETRIES,
+):
     """Obtain the VM's password if set.
 
     Once fetched the password is marked saved. Future calls to this method may
     return empty string or 'saved_password'."""
-    password_url = "{}:{}/{}/".format(metadata_url, password_server_port,
-                                      api_version)
+    password_url = "{}:{}/{}/".format(
+        metadata_url, password_server_port, api_version
+    )
     response = url_helper.read_file_or_url(
         password_url,
         ssl_details=None,
         headers={"DomU_Request": "send_my_password"},
         timeout=url_timeout,
-        retries=url_retries)
-    password = response.contents.decode('utf-8')
+        retries=url_retries,
+    )
+    password = response.contents.decode("utf-8")
     # the password is empty or already saved
     # Note: the original metadata server would answer an additional
     # 'bad_request' status, but the Exoscale implementation does not.
-    if password in ['', 'saved_password']:
+    if password in ["", "saved_password"]:
         return None
     # save the password
     url_helper.read_file_or_url(
@@ -180,44 +193,50 @@ def get_password(metadata_url=METADATA_URL,
         ssl_details=None,
         headers={"DomU_Request": "saved_password"},
         timeout=url_timeout,
-        retries=url_retries)
+        retries=url_retries,
+    )
     return password
 
 
-def read_metadata(metadata_url=METADATA_URL,
-                  api_version=API_VERSION,
-                  password_server_port=PASSWORD_SERVER_PORT,
-                  url_timeout=URL_TIMEOUT,
-                  url_retries=URL_RETRIES):
+def read_metadata(
+    metadata_url=METADATA_URL,
+    api_version=API_VERSION,
+    password_server_port=PASSWORD_SERVER_PORT,
+    url_timeout=URL_TIMEOUT,
+    url_retries=URL_RETRIES,
+):
     """Query the metadata server and return the retrieved data."""
     crawled_metadata = {}
-    crawled_metadata['_metadata_api_version'] = api_version
+    crawled_metadata["_metadata_api_version"] = api_version
     try:
-        crawled_metadata['user-data'] = ec2.get_instance_userdata(
-            api_version,
-            metadata_url,
-            timeout=url_timeout,
-            retries=url_retries)
-        crawled_metadata['meta-data'] = ec2.get_instance_metadata(
-            api_version,
-            metadata_url,
-            timeout=url_timeout,
-            retries=url_retries)
+        crawled_metadata["user-data"] = ec2.get_instance_userdata(
+            api_version, metadata_url, timeout=url_timeout, retries=url_retries
+        )
+        crawled_metadata["meta-data"] = ec2.get_instance_metadata(
+            api_version, metadata_url, timeout=url_timeout, retries=url_retries
+        )
     except Exception as e:
-        util.logexc(LOG, "failed reading from metadata url %s (%s)",
-                    metadata_url, e)
+        util.logexc(
+            LOG, "failed reading from metadata url %s (%s)", metadata_url, e
+        )
         return {}
 
     try:
-        crawled_metadata['password'] = get_password(
+        crawled_metadata["password"] = get_password(
             api_version=api_version,
             metadata_url=metadata_url,
             password_server_port=password_server_port,
             url_retries=url_retries,
-            url_timeout=url_timeout)
+            url_timeout=url_timeout,
+        )
     except Exception as e:
-        util.logexc(LOG, "failed to read from password server url %s:%s (%s)",
-                    metadata_url, password_server_port, e)
+        util.logexc(
+            LOG,
+            "failed to read from password server url %s:%s (%s)",
+            metadata_url,
+            password_server_port,
+            e,
+        )
 
     return crawled_metadata
 
@@ -225,35 +244,40 @@ def read_metadata(metadata_url=METADATA_URL,
 if __name__ == "__main__":
     import argparse
 
-    parser = argparse.ArgumentParser(description='Query Exoscale Metadata')
+    parser = argparse.ArgumentParser(description="Query Exoscale Metadata")
     parser.add_argument(
         "--endpoint",
         metavar="URL",
         help="The url of the metadata service.",
-        default=METADATA_URL)
+        default=METADATA_URL,
+    )
     parser.add_argument(
         "--version",
         metavar="VERSION",
         help="The version of the metadata endpoint to query.",
-        default=API_VERSION)
+        default=API_VERSION,
+    )
     parser.add_argument(
         "--retries",
         metavar="NUM",
         type=int,
         help="The number of retries querying the endpoint.",
-        default=URL_RETRIES)
+        default=URL_RETRIES,
+    )
     parser.add_argument(
         "--timeout",
         metavar="NUM",
         type=int,
         help="The time in seconds to wait before timing out.",
-        default=URL_TIMEOUT)
+        default=URL_TIMEOUT,
+    )
     parser.add_argument(
         "--password-port",
         metavar="PORT",
         type=int,
         help="The port on which the password endpoint listens",
-        default=PASSWORD_SERVER_PORT)
+        default=PASSWORD_SERVER_PORT,
+    )
 
     args = parser.parse_args()
 
@@ -262,7 +286,8 @@ if __name__ == "__main__":
         api_version=args.version,
         password_server_port=args.password_port,
         url_timeout=args.timeout,
-        url_retries=args.retries)
+        url_retries=args.retries,
+    )
 
     print(util.json_dumps(data))
 
diff --git a/cloudinit/sources/DataSourceGCE.py b/cloudinit/sources/DataSourceGCE.py
index b82fa410..c470bea8 100644
--- a/cloudinit/sources/DataSourceGCE.py
+++ b/cloudinit/sources/DataSourceGCE.py
@@ -4,31 +4,29 @@
 
 import datetime
 import json
-from contextlib import suppress as noop
-
 from base64 import b64decode
+from contextlib import suppress as noop
 
 from cloudinit import dmi
-from cloudinit.distros import ug_util
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import url_helper
-from cloudinit import util
+from cloudinit import sources, url_helper, util
+from cloudinit.distros import ug_util
 from cloudinit.net.dhcp import EphemeralDHCPv4
 
 LOG = logging.getLogger(__name__)
 
-MD_V1_URL = 'http://metadata.google.internal/computeMetadata/v1/'
-BUILTIN_DS_CONFIG = {'metadata_url': MD_V1_URL}
-REQUIRED_FIELDS = ('instance-id', 'availability-zone', 'local-hostname')
-GUEST_ATTRIBUTES_URL = ('http://metadata.google.internal/computeMetadata/'
-                        'v1/instance/guest-attributes')
-HOSTKEY_NAMESPACE = 'hostkeys'
-HEADERS = {'Metadata-Flavor': 'Google'}
+MD_V1_URL = "http://metadata.google.internal/computeMetadata/v1/"
+BUILTIN_DS_CONFIG = {"metadata_url": MD_V1_URL}
+REQUIRED_FIELDS = ("instance-id", "availability-zone", "local-hostname")
+GUEST_ATTRIBUTES_URL = (
+    "http://metadata.google.internal/computeMetadata/"
+    "v1/instance/guest-attributes"
+)
+HOSTKEY_NAMESPACE = "hostkeys"
+HEADERS = {"Metadata-Flavor": "Google"}
 
 
 class GoogleMetadataFetcher(object):
-
     def __init__(self, metadata_address, num_retries, sec_between_retries):
         self.metadata_address = metadata_address
         self.num_retries = num_retries
@@ -39,10 +37,13 @@ class GoogleMetadataFetcher(object):
         try:
             url = self.metadata_address + path
             if is_recursive:
-                url += '/?recursive=True'
-            resp = url_helper.readurl(url=url, headers=HEADERS,
-                                      retries=self.num_retries,
-                                      sec_between=self.sec_between_retries)
+                url += "/?recursive=True"
+            resp = url_helper.readurl(
+                url=url,
+                headers=HEADERS,
+                retries=self.num_retries,
+                sec_between=self.sec_between_retries,
+            )
         except url_helper.UrlError as exc:
             msg = "url %s raised exception %s"
             LOG.debug(msg, path, exc)
@@ -51,7 +52,7 @@ class GoogleMetadataFetcher(object):
                 if is_text:
                     value = util.decode_binary(resp.contents)
                 else:
-                    value = resp.contents.decode('utf-8')
+                    value = resp.contents.decode("utf-8")
             else:
                 LOG.debug("url %s returned code %s", path, resp.code)
         return value
@@ -59,7 +60,7 @@ class GoogleMetadataFetcher(object):
 
 class DataSourceGCE(sources.DataSource):
 
-    dsname = 'GCE'
+    dsname = "GCE"
     perform_dhcp_setup = False
 
     def __init__(self, sys_cfg, distro, paths):
@@ -69,10 +70,13 @@ class DataSourceGCE(sources.DataSource):
             (users, _groups) = ug_util.normalize_users_groups(sys_cfg, distro)
             (self.default_user, _user_config) = ug_util.extract_default(users)
         self.metadata = dict()
-        self.ds_cfg = util.mergemanydict([
-            util.get_cfg_by_path(sys_cfg, ["datasource", "GCE"], {}),
-            BUILTIN_DS_CONFIG])
-        self.metadata_address = self.ds_cfg['metadata_url']
+        self.ds_cfg = util.mergemanydict(
+            [
+                util.get_cfg_by_path(sys_cfg, ["datasource", "GCE"], {}),
+                BUILTIN_DS_CONFIG,
+            ]
+        )
+        self.metadata_address = self.ds_cfg["metadata_url"]
 
     def _get_data(self):
         url_params = self.get_url_params()
@@ -90,14 +94,14 @@ class DataSourceGCE(sources.DataSource):
                 },
             )
 
-        if not ret['success']:
-            if ret['platform_reports_gce']:
-                LOG.warning(ret['reason'])
+        if not ret["success"]:
+            if ret["platform_reports_gce"]:
+                LOG.warning(ret["reason"])
             else:
-                LOG.debug(ret['reason'])
+                LOG.debug(ret["reason"])
             return False
-        self.metadata = ret['meta-data']
-        self.userdata_raw = ret['user-data']
+        self.metadata = ret["meta-data"]
+        self.userdata_raw = ret["user-data"]
         return True
 
     @property
@@ -106,10 +110,10 @@ class DataSourceGCE(sources.DataSource):
         return None
 
     def get_instance_id(self):
-        return self.metadata['instance-id']
+        return self.metadata["instance-id"]
 
     def get_public_ssh_keys(self):
-        public_keys_data = self.metadata['public-keys-data']
+        public_keys_data = self.metadata["public-keys-data"]
         return _parse_public_keys(public_keys_data, self.default_user)
 
     def publish_host_keys(self, hostkeys):
@@ -118,15 +122,15 @@ class DataSourceGCE(sources.DataSource):
 
     def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
         # GCE has long FDQN's and has asked for short hostnames.
-        return self.metadata['local-hostname'].split('.')[0]
+        return self.metadata["local-hostname"].split(".")[0]
 
     @property
     def availability_zone(self):
-        return self.metadata['availability-zone']
+        return self.metadata["availability-zone"]
 
     @property
     def region(self):
-        return self.availability_zone.rsplit('-', 1)[0]
+        return self.availability_zone.rsplit("-", 1)[0]
 
 
 class DataSourceGCELocal(DataSourceGCE):
@@ -134,14 +138,19 @@ class DataSourceGCELocal(DataSourceGCE):
 
 
 def _write_host_key_to_guest_attributes(key_type, key_value):
-    url = '%s/%s/%s' % (GUEST_ATTRIBUTES_URL, HOSTKEY_NAMESPACE, key_type)
-    key_value = key_value.encode('utf-8')
-    resp = url_helper.readurl(url=url, data=key_value, headers=HEADERS,
-                              request_method='PUT', check_status=False)
+    url = "%s/%s/%s" % (GUEST_ATTRIBUTES_URL, HOSTKEY_NAMESPACE, key_type)
+    key_value = key_value.encode("utf-8")
+    resp = url_helper.readurl(
+        url=url,
+        data=key_value,
+        headers=HEADERS,
+        request_method="PUT",
+        check_status=False,
+    )
     if resp.ok():
-        LOG.debug('Wrote %s host key to guest attributes.', key_type)
+        LOG.debug("Wrote %s host key to guest attributes.", key_type)
     else:
-        LOG.debug('Unable to write %s host key to guest attributes.', key_type)
+        LOG.debug("Unable to write %s host key to guest attributes.", key_type)
 
 
 def _has_expired(public_key):
@@ -155,7 +164,7 @@ def _has_expired(public_key):
         return False
 
     # Do not expire keys if they do not have the expected schema identifier.
-    if schema != 'google-ssh':
+    if schema != "google-ssh":
         return False
 
     try:
@@ -164,11 +173,11 @@ def _has_expired(public_key):
         return False
 
     # Do not expire keys if there is no expriation timestamp.
-    if 'expireOn' not in json_obj:
+    if "expireOn" not in json_obj:
         return False
 
-    expire_str = json_obj['expireOn']
-    format_str = '%Y-%m-%dT%H:%M:%S+0000'
+    expire_str = json_obj["expireOn"]
+    format_str = "%Y-%m-%dT%H:%M:%S+0000"
     try:
         expire_time = datetime.datetime.strptime(expire_str, format_str)
     except ValueError:
@@ -189,11 +198,11 @@ def _parse_public_keys(public_keys_data, default_user=None):
     for public_key in public_keys_data:
         if not public_key or not all(ord(c) < 128 for c in public_key):
             continue
-        split_public_key = public_key.split(':', 1)
+        split_public_key = public_key.split(":", 1)
         if len(split_public_key) != 2:
             continue
         user, key = split_public_key
-        if user in ('cloudinit', default_user) and not _has_expired(key):
+        if user in ("cloudinit", default_user) and not _has_expired(key):
             public_keys.append(key)
     return public_keys
 
@@ -203,31 +212,35 @@ def read_md(address=None, url_params=None, platform_check=True):
     if address is None:
         address = MD_V1_URL
 
-    ret = {'meta-data': None, 'user-data': None,
-           'success': False, 'reason': None}
-    ret['platform_reports_gce'] = platform_reports_gce()
+    ret = {
+        "meta-data": None,
+        "user-data": None,
+        "success": False,
+        "reason": None,
+    }
+    ret["platform_reports_gce"] = platform_reports_gce()
 
-    if platform_check and not ret['platform_reports_gce']:
-        ret['reason'] = "Not running on GCE."
+    if platform_check and not ret["platform_reports_gce"]:
+        ret["reason"] = "Not running on GCE."
         return ret
 
     # If we cannot resolve the metadata server, then no point in trying.
     if not util.is_resolvable_url(address):
         LOG.debug("%s is not resolvable", address)
-        ret['reason'] = 'address "%s" is not resolvable' % address
+        ret["reason"] = 'address "%s" is not resolvable' % address
         return ret
 
     # url_map: (our-key, path, required, is_text, is_recursive)
     url_map = [
-        ('instance-id', ('instance/id',), True, True, False),
-        ('availability-zone', ('instance/zone',), True, True, False),
-        ('local-hostname', ('instance/hostname',), True, True, False),
-        ('instance-data', ('instance/attributes',), False, False, True),
-        ('project-data', ('project/attributes',), False, False, True),
+        ("instance-id", ("instance/id",), True, True, False),
+        ("availability-zone", ("instance/zone",), True, True, False),
+        ("local-hostname", ("instance/hostname",), True, True, False),
+        ("instance-data", ("instance/attributes",), False, False, True),
+        ("project-data", ("project/attributes",), False, False, True),
     ]
-    metadata_fetcher = GoogleMetadataFetcher(address,
-                                             url_params.num_retries,
-                                             url_params.sec_between_retries)
+    metadata_fetcher = GoogleMetadataFetcher(
+        address, url_params.num_retries, url_params.sec_between_retries
+    )
     md = {}
     # Iterate over url_map keys to get metadata items.
     for (mkey, paths, required, is_text, is_recursive) in url_map:
@@ -238,51 +251,52 @@ def read_md(address=None, url_params=None, platform_check=True):
                 value = new_value
         if required and value is None:
             msg = "required key %s returned nothing. not GCE"
-            ret['reason'] = msg % mkey
+            ret["reason"] = msg % mkey
             return ret
         md[mkey] = value
 
-    instance_data = json.loads(md['instance-data'] or '{}')
-    project_data = json.loads(md['project-data'] or '{}')
-    valid_keys = [instance_data.get('sshKeys'), instance_data.get('ssh-keys')]
-    block_project = instance_data.get('block-project-ssh-keys', '').lower()
-    if block_project != 'true' and not instance_data.get('sshKeys'):
-        valid_keys.append(project_data.get('ssh-keys'))
-        valid_keys.append(project_data.get('sshKeys'))
-    public_keys_data = '\n'.join([key for key in valid_keys if key])
-    md['public-keys-data'] = public_keys_data.splitlines()
+    instance_data = json.loads(md["instance-data"] or "{}")
+    project_data = json.loads(md["project-data"] or "{}")
+    valid_keys = [instance_data.get("sshKeys"), instance_data.get("ssh-keys")]
+    block_project = instance_data.get("block-project-ssh-keys", "").lower()
+    if block_project != "true" and not instance_data.get("sshKeys"):
+        valid_keys.append(project_data.get("ssh-keys"))
+        valid_keys.append(project_data.get("sshKeys"))
+    public_keys_data = "\n".join([key for key in valid_keys if key])
+    md["public-keys-data"] = public_keys_data.splitlines()
 
-    if md['availability-zone']:
-        md['availability-zone'] = md['availability-zone'].split('/')[-1]
+    if md["availability-zone"]:
+        md["availability-zone"] = md["availability-zone"].split("/")[-1]
 
-    if 'user-data' in instance_data:
+    if "user-data" in instance_data:
         # instance_data was json, so values are all utf-8 strings.
-        ud = instance_data['user-data'].encode("utf-8")
-        encoding = instance_data.get('user-data-encoding')
-        if encoding == 'base64':
+        ud = instance_data["user-data"].encode("utf-8")
+        encoding = instance_data.get("user-data-encoding")
+        if encoding == "base64":
             ud = b64decode(ud)
         elif encoding:
-            LOG.warning('unknown user-data-encoding: %s, ignoring', encoding)
-        ret['user-data'] = ud
+            LOG.warning("unknown user-data-encoding: %s, ignoring", encoding)
+        ret["user-data"] = ud
 
-    ret['meta-data'] = md
-    ret['success'] = True
+    ret["meta-data"] = md
+    ret["success"] = True
 
     return ret
 
 
 def platform_reports_gce():
-    pname = dmi.read_dmi_data('system-product-name') or "N/A"
+    pname = dmi.read_dmi_data("system-product-name") or "N/A"
     if pname == "Google Compute Engine" or pname == "Google":
         return True
 
     # system-product-name is not always guaranteed (LP: #1674861)
-    serial = dmi.read_dmi_data('system-serial-number') or "N/A"
+    serial = dmi.read_dmi_data("system-serial-number") or "N/A"
     if serial.startswith("GoogleCloud-"):
         return True
 
-    LOG.debug("Not running on google cloud. product-name=%s serial=%s",
-              pname, serial)
+    LOG.debug(
+        "Not running on google cloud. product-name=%s serial=%s", pname, serial
+    )
     return False
 
 
@@ -301,31 +315,38 @@ def get_datasource_list(depends):
 if __name__ == "__main__":
     import argparse
     import sys
-
     from base64 import b64encode
 
-    parser = argparse.ArgumentParser(description='Query GCE Metadata Service')
-    parser.add_argument("--endpoint", metavar="URL",
-                        help="The url of the metadata service.",
-                        default=MD_V1_URL)
-    parser.add_argument("--no-platform-check", dest="platform_check",
-                        help="Ignore smbios platform check",
-                        action='store_false', default=True)
+    parser = argparse.ArgumentParser(description="Query GCE Metadata Service")
+    parser.add_argument(
+        "--endpoint",
+        metavar="URL",
+        help="The url of the metadata service.",
+        default=MD_V1_URL,
+    )
+    parser.add_argument(
+        "--no-platform-check",
+        dest="platform_check",
+        help="Ignore smbios platform check",
+        action="store_false",
+        default=True,
+    )
     args = parser.parse_args()
     data = read_md(address=args.endpoint, platform_check=args.platform_check)
-    if 'user-data' in data:
+    if "user-data" in data:
         # user-data is bytes not string like other things. Handle it specially.
         # If it can be represented as utf-8 then do so. Otherwise print base64
         # encoded value in the key user-data-b64.
         try:
-            data['user-data'] = data['user-data'].decode()
+            data["user-data"] = data["user-data"].decode()
         except UnicodeDecodeError:
-            sys.stderr.write("User-data cannot be decoded. "
-                             "Writing as base64\n")
-            del data['user-data']
+            sys.stderr.write(
+                "User-data cannot be decoded. Writing as base64\n"
+            )
+            del data["user-data"]
             # b64encode returns a bytes value. Decode to get the string.
-            data['user-data-b64'] = b64encode(data['user-data']).decode()
+            data["user-data-b64"] = b64encode(data["user-data"]).decode()
 
-    print(json.dumps(data, indent=1, sort_keys=True, separators=(',', ': ')))
+    print(json.dumps(data, indent=1, sort_keys=True, separators=(",", ": ")))
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceHetzner.py b/cloudinit/sources/DataSourceHetzner.py
index c7c88dd7..50324cc4 100644
--- a/cloudinit/sources/DataSourceHetzner.py
+++ b/cloudinit/sources/DataSourceHetzner.py
@@ -6,21 +6,19 @@
 """Hetzner Cloud API Documentation
    https://docs.hetzner.cloud/"""
 
+import cloudinit.sources.helpers.hetzner as hc_helper
 from cloudinit import dmi
 from cloudinit import log as logging
 from cloudinit import net as cloudnet
-from cloudinit import sources
-from cloudinit import util
-
-import cloudinit.sources.helpers.hetzner as hc_helper
+from cloudinit import sources, util
 
 LOG = logging.getLogger(__name__)
 
-BASE_URL_V1 = 'http://169.254.169.254/hetzner/v1'
+BASE_URL_V1 = "http://169.254.169.254/hetzner/v1"
 
 BUILTIN_DS_CONFIG = {
-    'metadata_url': BASE_URL_V1 + '/metadata',
-    'userdata_url': BASE_URL_V1 + '/userdata',
+    "metadata_url": BASE_URL_V1 + "/metadata",
+    "userdata_url": BASE_URL_V1 + "/userdata",
 }
 
 MD_RETRIES = 60
@@ -30,20 +28,23 @@ MD_WAIT_RETRY = 2
 
 class DataSourceHetzner(sources.DataSource):
 
-    dsname = 'Hetzner'
+    dsname = "Hetzner"
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
         self.distro = distro
         self.metadata = dict()
-        self.ds_cfg = util.mergemanydict([
-            util.get_cfg_by_path(sys_cfg, ["datasource", "Hetzner"], {}),
-            BUILTIN_DS_CONFIG])
-        self.metadata_address = self.ds_cfg['metadata_url']
-        self.userdata_address = self.ds_cfg['userdata_url']
-        self.retries = self.ds_cfg.get('retries', MD_RETRIES)
-        self.timeout = self.ds_cfg.get('timeout', MD_TIMEOUT)
-        self.wait_retry = self.ds_cfg.get('wait_retry', MD_WAIT_RETRY)
+        self.ds_cfg = util.mergemanydict(
+            [
+                util.get_cfg_by_path(sys_cfg, ["datasource", "Hetzner"], {}),
+                BUILTIN_DS_CONFIG,
+            ]
+        )
+        self.metadata_address = self.ds_cfg["metadata_url"]
+        self.userdata_address = self.ds_cfg["userdata_url"]
+        self.retries = self.ds_cfg.get("retries", MD_RETRIES)
+        self.timeout = self.ds_cfg.get("timeout", MD_TIMEOUT)
+        self.wait_retry = self.ds_cfg.get("wait_retry", MD_WAIT_RETRY)
         self._network_config = None
         self.dsmode = sources.DSMODE_NETWORK
 
@@ -54,14 +55,21 @@ class DataSourceHetzner(sources.DataSource):
             return False
 
         nic = cloudnet.find_fallback_nic()
-        with cloudnet.EphemeralIPv4Network(nic, "169.254.0.1", 16,
-                                           "169.254.255.255"):
+        with cloudnet.EphemeralIPv4Network(
+            nic, "169.254.0.1", 16, "169.254.255.255"
+        ):
             md = hc_helper.read_metadata(
-                self.metadata_address, timeout=self.timeout,
-                sec_between=self.wait_retry, retries=self.retries)
+                self.metadata_address,
+                timeout=self.timeout,
+                sec_between=self.wait_retry,
+                retries=self.retries,
+            )
             ud = hc_helper.read_userdata(
-                self.userdata_address, timeout=self.timeout,
-                sec_between=self.wait_retry, retries=self.retries)
+                self.userdata_address,
+                timeout=self.timeout,
+                sec_between=self.wait_retry,
+                retries=self.retries,
+            )
 
         # Hetzner cloud does not support binary user-data. So here, do a
         # base64 decode of the data if we can. The end result being that a
@@ -76,10 +84,10 @@ class DataSourceHetzner(sources.DataSource):
         # hostname is name provided by user at launch.  The API enforces it is
         # a valid hostname, but it is not guaranteed to be resolvable in dns or
         # fully qualified.
-        self.metadata['instance-id'] = md['instance-id']
-        self.metadata['local-hostname'] = md['hostname']
-        self.metadata['network-config'] = md.get('network-config', None)
-        self.metadata['public-keys'] = md.get('public-keys', None)
+        self.metadata["instance-id"] = md["instance-id"]
+        self.metadata["local-hostname"] = md["hostname"]
+        self.metadata["network-config"] = md.get("network-config", None)
+        self.metadata["public-keys"] = md.get("public-keys", None)
         self.vendordata_raw = md.get("vendor_data", None)
 
         # instance-id and serial from SMBIOS should be identical
@@ -92,19 +100,20 @@ class DataSourceHetzner(sources.DataSource):
 
     def check_instance_id(self, sys_cfg):
         return sources.instance_id_matches_system_uuid(
-            self.get_instance_id(), 'system-serial-number')
+            self.get_instance_id(), "system-serial-number"
+        )
 
     @property
     def network_config(self):
         """Configure the networking. This needs to be done each boot, since
-           the IP information may have changed due to snapshot and/or
-           migration.
+        the IP information may have changed due to snapshot and/or
+        migration.
         """
 
         if self._network_config:
             return self._network_config
 
-        _net_config = self.metadata['network-config']
+        _net_config = self.metadata["network-config"]
         if not _net_config:
             raise Exception("Unable to get meta-data from server....")
 
@@ -114,7 +123,7 @@ class DataSourceHetzner(sources.DataSource):
 
 
 def get_hcloud_data():
-    vendor_name = dmi.read_dmi_data('system-manufacturer')
+    vendor_name = dmi.read_dmi_data("system-manufacturer")
     if vendor_name != "Hetzner":
         return (False, None)
 
@@ -129,7 +138,7 @@ def get_hcloud_data():
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceHetzner, (sources.DEP_FILESYSTEM, )),
+    (DataSourceHetzner, (sources.DEP_FILESYSTEM,)),
 ]
 
 
@@ -137,4 +146,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceIBMCloud.py b/cloudinit/sources/DataSourceIBMCloud.py
index 8d196185..18c3848f 100644
--- a/cloudinit/sources/DataSourceIBMCloud.py
+++ b/cloudinit/sources/DataSourceIBMCloud.py
@@ -97,10 +97,8 @@ import json
 import os
 
 from cloudinit import log as logging
-from cloudinit import sources
+from cloudinit import sources, subp, util
 from cloudinit.sources.helpers import openstack
-from cloudinit import subp
-from cloudinit import util
 
 LOG = logging.getLogger(__name__)
 
@@ -117,12 +115,13 @@ class Platforms(object):
 
 PROVISIONING = (
     Platforms.TEMPLATE_PROVISIONING_METADATA,
-    Platforms.TEMPLATE_PROVISIONING_NODATA)
+    Platforms.TEMPLATE_PROVISIONING_NODATA,
+)
 
 
 class DataSourceIBMCloud(sources.DataSource):
 
-    dsname = 'IBMCloud'
+    dsname = "IBMCloud"
     system_uuid = None
 
     def __init__(self, sys_cfg, distro, paths):
@@ -142,14 +141,14 @@ class DataSourceIBMCloud(sources.DataSource):
         if results is None:
             return False
 
-        self.source = results['source']
-        self.platform = results['platform']
-        self.metadata = results['metadata']
-        self.userdata_raw = results.get('userdata')
-        self.network_json = results.get('networkdata')
-        vd = results.get('vendordata')
+        self.source = results["source"]
+        self.platform = results["platform"]
+        self.metadata = results["metadata"]
+        self.userdata_raw = results.get("userdata")
+        self.network_json = results.get("networkdata")
+        vd = results.get("vendordata")
         self.vendordata_pure = vd
-        self.system_uuid = results['system-uuid']
+        self.system_uuid = results["system-uuid"]
         try:
             self.vendordata_raw = sources.convert_vendordata(vd)
         except ValueError as e:
@@ -160,7 +159,7 @@ class DataSourceIBMCloud(sources.DataSource):
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        return '%s (%s)' % (self.platform, self.source)
+        return "%s (%s)" % (self.platform, self.source)
 
     def check_instance_id(self, sys_cfg):
         """quickly (local check only) if self.instance_id is still valid
@@ -177,12 +176,13 @@ class DataSourceIBMCloud(sources.DataSource):
         if self.platform != Platforms.OS_CODE:
             # If deployed from template, an agent in the provisioning
             # environment handles networking configuration. Not cloud-init.
-            return {'config': 'disabled', 'version': 1}
+            return {"config": "disabled", "version": 1}
         if self._network_config is None:
             if self.network_json is not None:
                 LOG.debug("network config provided via network_json")
                 self._network_config = openstack.convert_net_json(
-                    self.network_json, known_macs=None)
+                    self.network_json, known_macs=None
+                )
             else:
                 LOG.debug("no network configuration available.")
         return self._network_config
@@ -200,22 +200,28 @@ def _is_xen():
 
 
 def _is_ibm_provisioning(
-        prov_cfg="/root/provisioningConfiguration.cfg",
-        inst_log="/root/swinstall.log",
-        boot_ref="/proc/1/environ"):
+    prov_cfg="/root/provisioningConfiguration.cfg",
+    inst_log="/root/swinstall.log",
+    boot_ref="/proc/1/environ",
+):
     """Return boolean indicating if this boot is ibm provisioning boot."""
     if os.path.exists(prov_cfg):
         msg = "config '%s' exists." % prov_cfg
         result = True
         if os.path.exists(inst_log):
             if os.path.exists(boot_ref):
-                result = (os.stat(inst_log).st_mtime >
-                          os.stat(boot_ref).st_mtime)
-                msg += (" log '%s' from %s boot." %
-                        (inst_log, "current" if result else "previous"))
+                result = (
+                    os.stat(inst_log).st_mtime > os.stat(boot_ref).st_mtime
+                )
+                msg += " log '%s' from %s boot." % (
+                    inst_log,
+                    "current" if result else "previous",
+                )
             else:
-                msg += (" log '%s' existed, but no reference file '%s'." %
-                        (inst_log, boot_ref))
+                msg += " log '%s' existed, but no reference file '%s'." % (
+                    inst_log,
+                    boot_ref,
+                )
                 result = False
         else:
             msg += " log '%s' did not exist." % inst_log
@@ -252,17 +258,26 @@ def get_ibm_platform():
         if label not in (label_mdata, label_cfg2):
             continue
         if label in fslabels:
-            LOG.warning("Duplicate fslabel '%s'. existing=%s current=%s",
-                        label, fslabels[label], data)
+            LOG.warning(
+                "Duplicate fslabel '%s'. existing=%s current=%s",
+                label,
+                fslabels[label],
+                data,
+            )
             continue
         if label == label_cfg2 and uuid != IBM_CONFIG_UUID:
-            LOG.debug("Skipping %s with LABEL=%s due to uuid != %s: %s",
-                      dev, label, uuid, data)
+            LOG.debug(
+                "Skipping %s with LABEL=%s due to uuid != %s: %s",
+                dev,
+                label,
+                uuid,
+                data,
+            )
             continue
         fslabels[label] = data
 
-    metadata_path = fslabels.get(label_mdata, {}).get('DEVNAME')
-    cfg2_path = fslabels.get(label_cfg2, {}).get('DEVNAME')
+    metadata_path = fslabels.get(label_mdata, {}).get("DEVNAME")
+    cfg2_path = fslabels.get(label_cfg2, {}).get("DEVNAME")
 
     if cfg2_path:
         return (Platforms.OS_CODE, cfg2_path)
@@ -288,12 +303,14 @@ def read_md():
         LOG.debug("This is not an IBMCloud platform.")
         return None
     elif platform in PROVISIONING:
-        LOG.debug("Cloud-init is disabled during provisioning: %s.",
-                  platform)
+        LOG.debug("Cloud-init is disabled during provisioning: %s.", platform)
         return None
 
-    ret = {'platform': platform, 'source': path,
-           'system-uuid': _read_system_uuid()}
+    ret = {
+        "platform": platform,
+        "source": path,
+        "system-uuid": _read_system_uuid(),
+    }
 
     try:
         if os.path.isdir(path):
@@ -302,8 +319,8 @@ def read_md():
             results = util.mount_cb(path, metadata_from_dir)
     except sources.BrokenMetadata as e:
         raise RuntimeError(
-            "Failed reading IBM config disk (platform=%s path=%s): %s" %
-            (platform, path, e)
+            "Failed reading IBM config disk (platform=%s path=%s): %s"
+            % (platform, path, e)
         ) from e
 
     ret.update(results)
@@ -329,14 +346,14 @@ def metadata_from_dir(source_dir):
         return os.path.join("openstack", "latest", fname)
 
     def load_json_bytes(blob):
-        return json.loads(blob.decode('utf-8'))
+        return json.loads(blob.decode("utf-8"))
 
     files = [
         # tuples of (results_name, path, translator)
-        ('metadata_raw', opath('meta_data.json'), load_json_bytes),
-        ('userdata', opath('user_data'), None),
-        ('vendordata', opath('vendor_data.json'), load_json_bytes),
-        ('networkdata', opath('network_data.json'), load_json_bytes),
+        ("metadata_raw", opath("meta_data.json"), load_json_bytes),
+        ("userdata", opath("user_data"), None),
+        ("vendordata", opath("vendor_data.json"), load_json_bytes),
+        ("networkdata", opath("network_data.json"), load_json_bytes),
     ]
 
     results = {}
@@ -355,28 +372,33 @@ def metadata_from_dir(source_dir):
                 data = transl(raw)
             except Exception as e:
                 raise sources.BrokenMetadata(
-                    "Failed decoding %s: %s" % (path, e))
+                    "Failed decoding %s: %s" % (path, e)
+                )
 
         results[name] = data
 
-    if results.get('metadata_raw') is None:
+    if results.get("metadata_raw") is None:
         raise sources.BrokenMetadata(
-            "%s missing required file 'meta_data.json'" % source_dir)
+            "%s missing required file 'meta_data.json'" % source_dir
+        )
 
-    results['metadata'] = {}
+    results["metadata"] = {}
 
-    md_raw = results['metadata_raw']
-    md = results['metadata']
-    if 'random_seed' in md_raw:
+    md_raw = results["metadata_raw"]
+    md = results["metadata"]
+    if "random_seed" in md_raw:
         try:
-            md['random_seed'] = base64.b64decode(md_raw['random_seed'])
+            md["random_seed"] = base64.b64decode(md_raw["random_seed"])
         except (ValueError, TypeError) as e:
             raise sources.BrokenMetadata(
-                "Badly formatted metadata random_seed entry: %s" % e)
+                "Badly formatted metadata random_seed entry: %s" % e
+            )
 
     renames = (
-        ('public_keys', 'public-keys'), ('hostname', 'local-hostname'),
-        ('uuid', 'instance-id'))
+        ("public_keys", "public-keys"),
+        ("hostname", "local-hostname"),
+        ("uuid", "instance-id"),
+    )
     for mdname, newname in renames:
         if mdname in md_raw:
             md[newname] = md_raw[mdname]
@@ -398,7 +420,7 @@ def get_datasource_list(depends):
 if __name__ == "__main__":
     import argparse
 
-    parser = argparse.ArgumentParser(description='Query IBM Cloud Metadata')
+    parser = argparse.ArgumentParser(description="Query IBM Cloud Metadata")
     args = parser.parse_args()
     data = read_md()
     print(util.json_dumps(data))
diff --git a/cloudinit/sources/DataSourceLXD.py b/cloudinit/sources/DataSourceLXD.py
index 469707d2..071ea87c 100644
--- a/cloudinit/sources/DataSourceLXD.py
+++ b/cloudinit/sources/DataSourceLXD.py
@@ -1,4 +1,3 @@
-
 """Datasource for LXD, reads /dev/lxd/sock representaton of instance data.
 
 Notes:
@@ -10,8 +9,10 @@ Notes:
  * TODO( Hotplug support using websockets API 1.0/events )
 """
 
-from json.decoder import JSONDecodeError
 import os
+import socket
+import stat
+from json.decoder import JSONDecodeError
 
 import requests
 from requests.adapters import HTTPAdapter
@@ -29,9 +30,6 @@ from requests.adapters import HTTPAdapter
 from requests.packages.urllib3.connection import HTTPConnection
 from requests.packages.urllib3.connectionpool import HTTPConnectionPool
 
-import socket
-import stat
-
 from cloudinit import log as logging
 from cloudinit import sources, subp, util
 
@@ -47,7 +45,7 @@ CONFIG_KEY_ALIASES = {
     "cloud-init.vendor-data": "vendor-data",
     "user.user-data": "user-data",
     "user.network-config": "network-config",
-    "user.vendor-data": "vendor-data"
+    "user.vendor-data": "vendor-data",
 }
 
 
@@ -57,18 +55,20 @@ def generate_fallback_network_config() -> dict:
         "version": 1,
         "config": [
             {
-                "type": "physical", "name": "eth0",
-                "subnets": [{"type": "dhcp", "control": "auto"}]
+                "type": "physical",
+                "name": "eth0",
+                "subnets": [{"type": "dhcp", "control": "auto"}],
             }
-        ]
+        ],
     }
     if subp.which("systemd-detect-virt"):
         try:
-            virt_type, _ = subp.subp(['systemd-detect-virt'])
+            virt_type, _ = subp.subp(["systemd-detect-virt"])
         except subp.ProcessExecutionError as err:
             LOG.warning(
                 "Unable to run systemd-detect-virt: %s."
-                " Rendering default network config.", err
+                " Rendering default network config.",
+                err,
             )
             return network_v1
         if virt_type.strip() == "kvm":  # instance.type VIRTUAL-MACHINE
@@ -84,7 +84,7 @@ def generate_fallback_network_config() -> dict:
 
 class SocketHTTPConnection(HTTPConnection):
     def __init__(self, socket_path):
-        super().__init__('localhost')
+        super().__init__("localhost")
         self.socket_path = socket_path
 
     def connect(self):
@@ -95,7 +95,7 @@ class SocketHTTPConnection(HTTPConnection):
 class SocketConnectionPool(HTTPConnectionPool):
     def __init__(self, socket_path):
         self.socket_path = socket_path
-        super().__init__('localhost')
+        super().__init__("localhost")
 
     def _new_conn(self):
         return SocketHTTPConnection(self.socket_path)
@@ -118,16 +118,16 @@ def _maybe_remove_top_network(cfg):
     if "network" not in cfg:
         return cfg
     network_val = cfg["network"]
-    bmsg = 'Top level network key in network-config %s: %s'
+    bmsg = "Top level network key in network-config %s: %s"
     if not isinstance(network_val, dict):
         LOG.debug(bmsg, "was not a dict", cfg)
         return cfg
     if len(list(cfg.keys())) != 1:
         LOG.debug(bmsg, "had multiple top level keys", cfg)
         return cfg
-    if network_val.get('config') == "disabled":
+    if network_val.get("config") == "disabled":
         LOG.debug(bmsg, "was config/disabled", cfg)
-    elif not all(('config' in network_val, 'version' in network_val)):
+    elif not all(("config" in network_val, "version" in network_val)):
         LOG.debug(bmsg, "but missing 'config' or 'version'", cfg)
         return cfg
     LOG.debug(bmsg, "fixed by removing shifting network.", cfg)
@@ -165,13 +165,16 @@ def _raw_instance_data_to_dict(metadata_type: str, metadata_value) -> dict:
 
 class DataSourceLXD(sources.DataSource):
 
-    dsname = 'LXD'
+    dsname = "LXD"
 
     _network_config = sources.UNSET
     _crawled_metadata = sources.UNSET
 
     sensitive_metadata_keys = (
-        'merged_cfg', 'user.meta-data', 'user.vendor-data', 'user.user-data',
+        "merged_cfg",
+        "user.meta-data",
+        "user.vendor-data",
+        "user.user-data",
     )
 
     def _is_platform_viable(self) -> bool:
@@ -185,8 +188,10 @@ class DataSourceLXD(sources.DataSource):
             return False
 
         self._crawled_metadata = util.log_time(
-            logfunc=LOG.debug, msg='Crawl of metadata service',
-            func=read_metadata)
+            logfunc=LOG.debug,
+            msg="Crawl of metadata service",
+            func=read_metadata,
+        )
         self.metadata = _raw_instance_data_to_dict(
             "meta-data", self._crawled_metadata.get("meta-data")
         )
@@ -293,7 +298,7 @@ def read_metadata(
                 "Invalid HTTP response [{code}] from {route}: {resp}".format(
                     code=response.status_code,
                     route=md_route,
-                    resp=response.text
+                    resp=response.text,
                 )
             )
 
@@ -304,7 +309,7 @@ def read_metadata(
         md = {
             "_metadata_api_version": api_version,  # Document API version read
             "config": {},
-            "meta-data": md["meta-data"]
+            "meta-data": md["meta-data"],
         }
 
         config_url = version_url + "config"
@@ -317,7 +322,7 @@ def read_metadata(
                 "Invalid HTTP response [{code}] from {route}: {resp}".format(
                     code=response.status_code,
                     route=config_url,
-                    resp=response.text
+                    resp=response.text,
                 )
             )
         try:
@@ -326,8 +331,7 @@ def read_metadata(
             raise sources.InvalidMetaDataException(
                 "Unable to determine cloud-init config from {route}."
                 " Expected JSON but found: {resp}".format(
-                    route=config_url,
-                    resp=response.text
+                    route=config_url, resp=response.text
                 )
             ) from exc
 
@@ -354,12 +358,15 @@ def read_metadata(
                     else:
                         LOG.warning(
                             "Ignoring LXD config %s in favor of %s value.",
-                            cfg_key, cfg_key.replace("user", "cloud-init", 1)
+                            cfg_key,
+                            cfg_key.replace("user", "cloud-init", 1),
                         )
             else:
                 LOG.debug(
                     "Skipping %s on [HTTP:%d]:%s",
-                    url, response.status_code, response.text
+                    url,
+                    response.status_code,
+                    response.text,
                 )
     return md
 
diff --git a/cloudinit/sources/DataSourceMAAS.py b/cloudinit/sources/DataSourceMAAS.py
index 9156925f..d554db0d 100644
--- a/cloudinit/sources/DataSourceMAAS.py
+++ b/cloudinit/sources/DataSourceMAAS.py
@@ -11,20 +11,18 @@ import os
 import time
 
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import url_helper
-from cloudinit import util
+from cloudinit import sources, url_helper, util
 
 LOG = logging.getLogger(__name__)
 MD_VERSION = "2012-03-01"
 
 DS_FIELDS = [
     # remote path, location in dictionary, binary data?, optional?
-    ("meta-data/instance-id", 'meta-data/instance-id', False, False),
-    ("meta-data/local-hostname", 'meta-data/local-hostname', False, False),
-    ("meta-data/public-keys", 'meta-data/public-keys', False, True),
-    ('meta-data/vendor-data', 'vendor-data', True, True),
-    ('user-data', 'user-data', True, True),
+    ("meta-data/instance-id", "meta-data/instance-id", False, False),
+    ("meta-data/local-hostname", "meta-data/local-hostname", False, False),
+    ("meta-data/public-keys", "meta-data/public-keys", False, True),
+    ("meta-data/vendor-data", "vendor-data", True, True),
+    ("user-data", "user-data", True, True),
 ]
 
 
@@ -46,7 +44,7 @@ class DataSourceMAAS(sources.DataSource):
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
         self.base_url = None
-        self.seed_dir = os.path.join(paths.seed_dir, 'maas')
+        self.seed_dir = os.path.join(paths.seed_dir, "maas")
         self.id_hash = get_id_from_ds_cfg(self.ds_cfg)
 
     @property
@@ -72,7 +70,7 @@ class DataSourceMAAS(sources.DataSource):
             raise
 
         # If there is no metadata_url, then we're not configured
-        url = mcfg.get('metadata_url', None)
+        url = mcfg.get("metadata_url", None)
         if not url:
             return False
 
@@ -85,9 +83,14 @@ class DataSourceMAAS(sources.DataSource):
                 return False
 
             self._set_data(
-                url, read_maas_seed_url(
-                    url, read_file_or_url=self.oauth_helper.readurl,
-                    paths=self.paths, retries=1))
+                url,
+                read_maas_seed_url(
+                    url,
+                    read_file_or_url=self.oauth_helper.readurl,
+                    paths=self.paths,
+                    retries=1,
+                ),
+            )
             return True
         except Exception:
             util.logexc(LOG, "Failed fetching metadata from url %s", url)
@@ -109,7 +112,7 @@ class DataSourceMAAS(sources.DataSource):
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        return 'seed-dir (%s)' % self.base_url
+        return "seed-dir (%s)" % self.base_url
 
     def wait_for_metadata_service(self, url):
         mcfg = self.ds_cfg
@@ -135,13 +138,17 @@ class DataSourceMAAS(sources.DataSource):
         check_url = "%s/%s/meta-data/instance-id" % (url, MD_VERSION)
         urls = [check_url]
         url, _response = self.oauth_helper.wait_for_url(
-            urls=urls, max_wait=max_wait, timeout=timeout)
+            urls=urls, max_wait=max_wait, timeout=timeout
+        )
 
         if url:
             LOG.debug("Using metadata source: '%s'", url)
         else:
-            LOG.critical("Giving up on md from %s after %i seconds",
-                         urls, int(time.time() - starttime))
+            LOG.critical(
+                "Giving up on md from %s after %i seconds",
+                urls,
+                int(time.time() - starttime),
+            )
 
         return bool(url)
 
@@ -154,26 +161,26 @@ class DataSourceMAAS(sources.DataSource):
         if self.id_hash is None:
             return False
         ncfg = util.get_cfg_by_path(sys_cfg, ("datasource", self.dsname), {})
-        return (self.id_hash == get_id_from_ds_cfg(ncfg))
+        return self.id_hash == get_id_from_ds_cfg(ncfg)
 
 
 def get_oauth_helper(cfg):
     """Return an oauth helper instance for values in cfg.
 
-       @raises ValueError from OauthUrlHelper if some required fields have
-               true-ish values but others do not."""
-    keys = ('consumer_key', 'consumer_secret', 'token_key', 'token_secret')
+    @raises ValueError from OauthUrlHelper if some required fields have
+            true-ish values but others do not."""
+    keys = ("consumer_key", "consumer_secret", "token_key", "token_secret")
     kwargs = dict([(r, cfg.get(r)) for r in keys])
     return url_helper.OauthUrlHelper(**kwargs)
 
 
 def get_id_from_ds_cfg(ds_cfg):
     """Given a config, generate a unique identifier for this node."""
-    fields = ('consumer_key', 'token_key', 'token_secret')
-    idstr = '\0'.join([ds_cfg.get(f, "") for f in fields])
+    fields = ("consumer_key", "token_key", "token_secret")
+    idstr = "\0".join([ds_cfg.get(f, "") for f in fields])
     # store the encoding version as part of the hash in the event
     # that it ever changed we can compute older versions.
-    return 'v1:' + hashlib.sha256(idstr.encode('utf-8')).hexdigest()
+    return "v1:" + hashlib.sha256(idstr.encode("utf-8")).hexdigest()
 
 
 def read_maas_seed_dir(seed_d):
@@ -186,8 +193,14 @@ def read_maas_seed_dir(seed_d):
     return read_maas_seed_url("file://%s" % seed_d, version=None)
 
 
-def read_maas_seed_url(seed_url, read_file_or_url=None, timeout=None,
-                       version=MD_VERSION, paths=None, retries=None):
+def read_maas_seed_url(
+    seed_url,
+    read_file_or_url=None,
+    timeout=None,
+    version=MD_VERSION,
+    paths=None,
+    retries=None,
+):
     """
     Read the maas datasource at seed_url.
       read_file_or_url is a method that should provide an interface
@@ -213,16 +226,20 @@ def read_maas_seed_url(seed_url, read_file_or_url=None, timeout=None,
             url = "%s/%s/%s" % (seed_url, version, path)
         try:
             ssl_details = util.fetch_ssl_details(paths)
-            resp = read_file_or_url(url, retries=retries, timeout=timeout,
-                                    ssl_details=ssl_details)
+            resp = read_file_or_url(
+                url, retries=retries, timeout=timeout, ssl_details=ssl_details
+            )
             if resp.ok():
                 if binary:
                     md[path] = resp.contents
                 else:
                     md[path] = util.decode_binary(resp.contents)
             else:
-                LOG.warning(("Fetching from %s resulted in"
-                             " an invalid http code %s"), url, resp.code)
+                LOG.warning(
+                    "Fetching from %s resulted in an invalid http code %s",
+                    url,
+                    resp.code,
+                )
         except url_helper.UrlError as e:
             if e.code == 404 and not optional:
                 raise MAASSeedDirMalformed(
@@ -236,8 +253,8 @@ def read_maas_seed_url(seed_url, read_file_or_url=None, timeout=None,
 
 def check_seed_contents(content, seed):
     """Validate if dictionary content valid as a return for a datasource.
-       Either return a (userdata, metadata, vendordata) tuple or
-       Raise MAASSeedDirMalformed or MAASSeedDirNone
+    Either return a (userdata, metadata, vendordata) tuple or
+    Raise MAASSeedDirMalformed or MAASSeedDirNone
     """
     ret = {}
     missing = []
@@ -262,14 +279,15 @@ def check_seed_contents(content, seed):
         raise MAASSeedDirMalformed("%s: missing files %s" % (seed, missing))
 
     vd_data = None
-    if ret.get('vendor-data'):
+    if ret.get("vendor-data"):
         err = object()
-        vd_data = util.load_yaml(ret.get('vendor-data'), default=err,
-                                 allowed=(object))
+        vd_data = util.load_yaml(
+            ret.get("vendor-data"), default=err, allowed=(object)
+        )
         if vd_data is err:
             raise MAASSeedDirMalformed("vendor-data was not loadable as yaml.")
 
-    return ret.get('user-data'), ret.get('meta-data'), vd_data
+    return ret.get("user-data"), ret.get("meta-data"), vd_data
 
 
 class MAASSeedDirNone(Exception):
@@ -292,6 +310,7 @@ def get_datasource_list(depends):
 
 
 if __name__ == "__main__":
+
     def main():
         """
         Call with single argument of directory or http or https url.
@@ -302,36 +321,66 @@ if __name__ == "__main__":
         import pprint
         import sys
 
-        parser = argparse.ArgumentParser(description='Interact with MAAS DS')
-        parser.add_argument("--config", metavar="file",
-                            help="specify DS config file", default=None)
-        parser.add_argument("--ckey", metavar="key",
-                            help="the consumer key to auth with", default=None)
-        parser.add_argument("--tkey", metavar="key",
-                            help="the token key to auth with", default=None)
-        parser.add_argument("--csec", metavar="secret",
-                            help="the consumer secret (likely '')", default="")
-        parser.add_argument("--tsec", metavar="secret",
-                            help="the token secret to auth with", default=None)
-        parser.add_argument("--apiver", metavar="version",
-                            help="the apiver to use ("" can be used)",
-                            default=MD_VERSION)
+        parser = argparse.ArgumentParser(description="Interact with MAAS DS")
+        parser.add_argument(
+            "--config",
+            metavar="file",
+            help="specify DS config file",
+            default=None,
+        )
+        parser.add_argument(
+            "--ckey",
+            metavar="key",
+            help="the consumer key to auth with",
+            default=None,
+        )
+        parser.add_argument(
+            "--tkey",
+            metavar="key",
+            help="the token key to auth with",
+            default=None,
+        )
+        parser.add_argument(
+            "--csec",
+            metavar="secret",
+            help="the consumer secret (likely '')",
+            default="",
+        )
+        parser.add_argument(
+            "--tsec",
+            metavar="secret",
+            help="the token secret to auth with",
+            default=None,
+        )
+        parser.add_argument(
+            "--apiver",
+            metavar="version",
+            help="the apiver to use ( can be used)",
+            default=MD_VERSION,
+        )
 
         subcmds = parser.add_subparsers(title="subcommands", dest="subcmd")
-        for (name, help) in (('crawl', 'crawl the datasource'),
-                             ('get', 'do a single GET of provided url'),
-                             ('check-seed', 'read and verify seed at url')):
+        for (name, help) in (
+            ("crawl", "crawl the datasource"),
+            ("get", "do a single GET of provided url"),
+            ("check-seed", "read and verify seed at url"),
+        ):
             p = subcmds.add_parser(name, help=help)
-            p.add_argument("url", help="the datasource url", nargs='?',
-                           default=None)
+            p.add_argument(
+                "url", help="the datasource url", nargs="?", default=None
+            )
 
         args = parser.parse_args()
 
-        creds = {'consumer_key': args.ckey, 'token_key': args.tkey,
-                 'token_secret': args.tsec, 'consumer_secret': args.csec}
+        creds = {
+            "consumer_key": args.ckey,
+            "token_key": args.tkey,
+            "token_secret": args.tsec,
+            "consumer_secret": args.csec,
+        }
 
         if args.config is None:
-            for fname in ('91_kernel_cmdline_url', '90_dpkg_maas'):
+            for fname in ("91_kernel_cmdline_url", "90_dpkg_maas"):
                 fpath = "/etc/cloud/cloud.cfg.d/" + fname + ".cfg"
                 if os.path.exists(fpath) and os.access(fpath, os.R_OK):
                     sys.stderr.write("Used config in %s.\n" % fpath)
@@ -339,13 +388,13 @@ if __name__ == "__main__":
 
         if args.config:
             cfg = util.read_conf(args.config)
-            if 'datasource' in cfg:
-                cfg = cfg['datasource']['MAAS']
+            if "datasource" in cfg:
+                cfg = cfg["datasource"]["MAAS"]
             for key in creds.keys():
                 if key in cfg and creds[key] is None:
                     creds[key] = cfg[key]
-            if args.url is None and 'metadata_url' in cfg:
-                args.url = cfg['metadata_url']
+            if args.url is None and "metadata_url" in cfg:
+                args.url = cfg["metadata_url"]
 
         if args.url is None:
             sys.stderr.write("Must provide a url or a config with url.\n")
@@ -380,8 +429,11 @@ if __name__ == "__main__":
                 (userdata, metadata, vd) = read_maas_seed_dir(args.url)
             else:
                 (userdata, metadata, vd) = read_maas_seed_url(
-                    args.url, version=args.apiver, read_file_or_url=readurl,
-                    retries=2)
+                    args.url,
+                    version=args.apiver,
+                    read_file_or_url=readurl,
+                    retries=2,
+                )
             print("=== user-data ===")
             print("N/A" if userdata is None else userdata.decode())
             print("=== meta-data ===")
diff --git a/cloudinit/sources/DataSourceNoCloud.py b/cloudinit/sources/DataSourceNoCloud.py
index 2d9e86b4..56559630 100644
--- a/cloudinit/sources/DataSourceNoCloud.py
+++ b/cloudinit/sources/DataSourceNoCloud.py
@@ -13,9 +13,8 @@ import os
 
 from cloudinit import dmi
 from cloudinit import log as logging
+from cloudinit import sources, util
 from cloudinit.net import eni
-from cloudinit import sources
-from cloudinit import util
 
 LOG = logging.getLogger(__name__)
 
@@ -27,8 +26,10 @@ class DataSourceNoCloud(sources.DataSource):
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
         self.seed = None
-        self.seed_dirs = [os.path.join(paths.seed_dir, 'nocloud'),
-                          os.path.join(paths.seed_dir, 'nocloud-net')]
+        self.seed_dirs = [
+            os.path.join(paths.seed_dir, "nocloud"),
+            os.path.join(paths.seed_dir, "nocloud-net"),
+        ]
         self.seed_dir = None
         self.supported_seed_starts = ("/", "file://")
 
@@ -55,17 +56,21 @@ class DataSourceNoCloud(sources.DataSource):
         }
 
         found = []
-        mydata = {'meta-data': {}, 'user-data': "", 'vendor-data': "",
-                  'network-config': None}
+        mydata = {
+            "meta-data": {},
+            "user-data": "",
+            "vendor-data": "",
+            "network-config": None,
+        }
 
         try:
             # Parse the system serial label from dmi. If not empty, try parsing
             # like the commandline
             md = {}
-            serial = dmi.read_dmi_data('system-serial-number')
+            serial = dmi.read_dmi_data("system-serial-number")
             if serial and load_cmdline_data(md, serial):
                 found.append("dmi")
-                mydata = _merge_new_seed(mydata, {'meta-data': md})
+                mydata = _merge_new_seed(mydata, {"meta-data": md})
         except Exception:
             util.logexc(LOG, "Unable to parse dmi data")
             return False
@@ -75,14 +80,16 @@ class DataSourceNoCloud(sources.DataSource):
             md = {}
             if load_cmdline_data(md):
                 found.append("cmdline")
-                mydata = _merge_new_seed(mydata, {'meta-data': md})
+                mydata = _merge_new_seed(mydata, {"meta-data": md})
         except Exception:
             util.logexc(LOG, "Unable to parse command line data")
             return False
 
         # Check to see if the seed dir has data.
-        pp2d_kwargs = {'required': ['user-data', 'meta-data'],
-                       'optional': ['vendor-data', 'network-config']}
+        pp2d_kwargs = {
+            "required": ["user-data", "meta-data"],
+            "optional": ["vendor-data", "network-config"],
+        }
 
         for path in self.seed_dirs:
             try:
@@ -97,31 +104,35 @@ class DataSourceNoCloud(sources.DataSource):
         # If the datasource config had a 'seedfrom' entry, then that takes
         # precedence over a 'seedfrom' that was found in a filesystem
         # but not over external media
-        if self.ds_cfg.get('seedfrom'):
+        if self.ds_cfg.get("seedfrom"):
             found.append("ds_config_seedfrom")
-            mydata['meta-data']["seedfrom"] = self.ds_cfg['seedfrom']
+            mydata["meta-data"]["seedfrom"] = self.ds_cfg["seedfrom"]
 
         # fields appropriately named can also just come from the datasource
         # config (ie, 'user-data', 'meta-data', 'vendor-data' there)
-        if 'user-data' in self.ds_cfg and 'meta-data' in self.ds_cfg:
+        if "user-data" in self.ds_cfg and "meta-data" in self.ds_cfg:
             mydata = _merge_new_seed(mydata, self.ds_cfg)
             found.append("ds_config")
 
         def _pp2d_callback(mp, data):
             return util.pathprefix2dict(mp, **data)
 
-        label = self.ds_cfg.get('fs_label', "cidata")
+        label = self.ds_cfg.get("fs_label", "cidata")
         if label is not None:
             for dev in self._get_devices(label):
                 try:
                     LOG.debug("Attempting to use data from %s", dev)
 
                     try:
-                        seeded = util.mount_cb(dev, _pp2d_callback,
-                                               pp2d_kwargs)
+                        seeded = util.mount_cb(
+                            dev, _pp2d_callback, pp2d_kwargs
+                        )
                     except ValueError:
-                        LOG.warning("device %s with label=%s not a "
-                                    "valid seed.", dev, label)
+                        LOG.warning(
+                            "device %s with label=%s not a valid seed.",
+                            dev,
+                            label,
+                        )
                         continue
 
                     mydata = _merge_new_seed(mydata, seeded)
@@ -133,8 +144,9 @@ class DataSourceNoCloud(sources.DataSource):
                     if e.errno != errno.ENOENT:
                         raise
                 except util.MountFailedError:
-                    util.logexc(LOG, "Failed to mount %s when looking for "
-                                "data", dev)
+                    util.logexc(
+                        LOG, "Failed to mount %s when looking for data", dev
+                    )
 
         # There was no indication on kernel cmdline or data
         # in the seeddir suggesting this handler should be used.
@@ -145,8 +157,8 @@ class DataSourceNoCloud(sources.DataSource):
         # attempt to seed the userdata / metadata from its value
         # its primarily value is in allowing the user to type less
         # on the command line, ie: ds=nocloud;s=http://bit.ly/abcdefg
-        if "seedfrom" in mydata['meta-data']:
-            seedfrom = mydata['meta-data']["seedfrom"]
+        if "seedfrom" in mydata["meta-data"]:
+            seedfrom = mydata["meta-data"]["seedfrom"]
             seedfound = False
             for proto in self.supported_seed_starts:
                 if seedfrom.startswith(proto):
@@ -162,39 +174,43 @@ class DataSourceNoCloud(sources.DataSource):
             LOG.debug("Using seeded cache data from %s", seedfrom)
 
             # Values in the command line override those from the seed
-            mydata['meta-data'] = util.mergemanydict([mydata['meta-data'],
-                                                      md_seed])
-            mydata['user-data'] = ud
-            mydata['vendor-data'] = vd
+            mydata["meta-data"] = util.mergemanydict(
+                [mydata["meta-data"], md_seed]
+            )
+            mydata["user-data"] = ud
+            mydata["vendor-data"] = vd
             found.append(seedfrom)
 
         # Now that we have exhausted any other places merge in the defaults
-        mydata['meta-data'] = util.mergemanydict([mydata['meta-data'],
-                                                  defaults])
+        mydata["meta-data"] = util.mergemanydict(
+            [mydata["meta-data"], defaults]
+        )
 
         self.dsmode = self._determine_dsmode(
-            [mydata['meta-data'].get('dsmode')])
+            [mydata["meta-data"].get("dsmode")]
+        )
 
         if self.dsmode == sources.DSMODE_DISABLED:
-            LOG.debug("%s: not claiming datasource, dsmode=%s", self,
-                      self.dsmode)
+            LOG.debug(
+                "%s: not claiming datasource, dsmode=%s", self, self.dsmode
+            )
             return False
 
         self.seed = ",".join(found)
-        self.metadata = mydata['meta-data']
-        self.userdata_raw = mydata['user-data']
-        self.vendordata_raw = mydata['vendor-data']
-        self._network_config = mydata['network-config']
-        self._network_eni = mydata['meta-data'].get('network-interfaces')
+        self.metadata = mydata["meta-data"]
+        self.userdata_raw = mydata["user-data"]
+        self.vendordata_raw = mydata["vendor-data"]
+        self._network_config = mydata["network-config"]
+        self._network_eni = mydata["meta-data"].get("network-interfaces")
         return True
 
     @property
     def platform_type(self):
         # Handle upgrade path of pickled ds
-        if not hasattr(self, '_platform_type'):
+        if not hasattr(self, "_platform_type"):
             self._platform_type = None
         if not self._platform_type:
-            self._platform_type = 'lxd' if util.is_lxd() else 'nocloud'
+            self._platform_type = "lxd" if util.is_lxd() else "nocloud"
         return self._platform_type
 
     def _get_cloud_name(self):
@@ -203,11 +219,11 @@ class DataSourceNoCloud(sources.DataSource):
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        if self.seed.startswith('/dev'):
-            subplatform_type = 'config-disk'
+        if self.seed.startswith("/dev"):
+            subplatform_type = "config-disk"
         else:
-            subplatform_type = 'seed-dir'
-        return '%s (%s)' % (subplatform_type, self.seed)
+            subplatform_type = "seed-dir"
+        return "%s (%s)" % (subplatform_type, self.seed)
 
     def check_instance_id(self, sys_cfg):
         # quickly (local check only) if self.instance_id is still valid
@@ -218,7 +234,7 @@ class DataSourceNoCloud(sources.DataSource):
 
         # LP: #1568150 need getattr in the case that an old class object
         # has been loaded from a pickled file and now executing new source.
-        dirs = getattr(self, 'seed_dirs', [self.seed_dir])
+        dirs = getattr(self, "seed_dirs", [self.seed_dir])
         quick_id = _quick_read_instance_id(dirs=dirs)
         if not quick_id:
             return None
@@ -236,7 +252,7 @@ def _quick_read_instance_id(dirs=None):
     if dirs is None:
         dirs = []
 
-    iid_key = 'instance-id'
+    iid_key = "instance-id"
     fill = {}
     if load_cmdline_data(fill) and iid_key in fill:
         return fill[iid_key]
@@ -245,8 +261,8 @@ def _quick_read_instance_id(dirs=None):
         if d is None:
             continue
         try:
-            data = util.pathprefix2dict(d, required=['meta-data'])
-            md = util.load_yaml(data['meta-data'])
+            data = util.pathprefix2dict(d, required=["meta-data"])
+            md = util.load_yaml(data["meta-data"])
             if md and iid_key in md:
                 return md[iid_key]
         except ValueError:
@@ -256,14 +272,16 @@ def _quick_read_instance_id(dirs=None):
 
 
 def load_cmdline_data(fill, cmdline=None):
-    pairs = [("ds=nocloud", sources.DSMODE_LOCAL),
-             ("ds=nocloud-net", sources.DSMODE_NETWORK)]
+    pairs = [
+        ("ds=nocloud", sources.DSMODE_LOCAL),
+        ("ds=nocloud-net", sources.DSMODE_NETWORK),
+    ]
     for idstr, dsmode in pairs:
         if parse_cmdline_data(idstr, fill, cmdline):
             # if dsmode was explicitly in the command line, then
             # prefer it to the dsmode based on the command line id
-            if 'dsmode' not in fill:
-                fill['dsmode'] = dsmode
+            if "dsmode" not in fill:
+                fill["dsmode"] = dsmode
             return True
     return False
 
@@ -323,19 +341,19 @@ def _maybe_remove_top_network(cfg):
 
     Return the original value if no change or the updated value if changed."""
     nullval = object()
-    network_val = cfg.get('network', nullval)
+    network_val = cfg.get("network", nullval)
     if network_val is nullval:
         return cfg
-    bmsg = 'Top level network key in network-config %s: %s'
+    bmsg = "Top level network key in network-config %s: %s"
     if not isinstance(network_val, dict):
         LOG.debug(bmsg, "was not a dict", cfg)
         return cfg
     if len(list(cfg.keys())) != 1:
         LOG.debug(bmsg, "had multiple top level keys", cfg)
         return cfg
-    if network_val.get('config') == "disabled":
+    if network_val.get("config") == "disabled":
         LOG.debug(bmsg, "was config/disabled", cfg)
-    elif not all(('config' in network_val, 'version' in network_val)):
+    elif not all(("config" in network_val, "version" in network_val)):
         LOG.debug(bmsg, "but missing 'config' or 'version'", cfg)
         return cfg
     LOG.debug(bmsg, "fixed by removing shifting network.", cfg)
@@ -345,19 +363,20 @@ def _maybe_remove_top_network(cfg):
 def _merge_new_seed(cur, seeded):
     ret = cur.copy()
 
-    newmd = seeded.get('meta-data', {})
-    if not isinstance(seeded['meta-data'], dict):
-        newmd = util.load_yaml(seeded['meta-data'])
-    ret['meta-data'] = util.mergemanydict([cur['meta-data'], newmd])
+    newmd = seeded.get("meta-data", {})
+    if not isinstance(seeded["meta-data"], dict):
+        newmd = util.load_yaml(seeded["meta-data"])
+    ret["meta-data"] = util.mergemanydict([cur["meta-data"], newmd])
 
-    if seeded.get('network-config'):
-        ret['network-config'] = _maybe_remove_top_network(
-            util.load_yaml(seeded.get('network-config')))
+    if seeded.get("network-config"):
+        ret["network-config"] = _maybe_remove_top_network(
+            util.load_yaml(seeded.get("network-config"))
+        )
 
-    if 'user-data' in seeded:
-        ret['user-data'] = seeded['user-data']
-    if 'vendor-data' in seeded:
-        ret['vendor-data'] = seeded['vendor-data']
+    if "user-data" in seeded:
+        ret["user-data"] = seeded["user-data"]
+    if "vendor-data" in seeded:
+        ret["vendor-data"] = seeded["vendor-data"]
     return ret
 
 
@@ -369,7 +388,7 @@ class DataSourceNoCloudNet(DataSourceNoCloud):
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceNoCloud, (sources.DEP_FILESYSTEM, )),
+    (DataSourceNoCloud, (sources.DEP_FILESYSTEM,)),
     (DataSourceNoCloudNet, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
 ]
 
@@ -378,4 +397,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceNone.py b/cloudinit/sources/DataSourceNone.py
index b7656ac5..036d00b2 100644
--- a/cloudinit/sources/DataSourceNone.py
+++ b/cloudinit/sources/DataSourceNone.py
@@ -14,23 +14,23 @@ class DataSourceNone(sources.DataSource):
     def __init__(self, sys_cfg, distro, paths, ud_proc=None):
         sources.DataSource.__init__(self, sys_cfg, distro, paths, ud_proc)
         self.metadata = {}
-        self.userdata_raw = ''
+        self.userdata_raw = ""
 
     def _get_data(self):
         # If the datasource config has any provided 'fallback'
         # userdata or metadata, use it...
-        if 'userdata_raw' in self.ds_cfg:
-            self.userdata_raw = self.ds_cfg['userdata_raw']
-        if 'metadata' in self.ds_cfg:
-            self.metadata = self.ds_cfg['metadata']
+        if "userdata_raw" in self.ds_cfg:
+            self.userdata_raw = self.ds_cfg["userdata_raw"]
+        if "metadata" in self.ds_cfg:
+            self.metadata = self.ds_cfg["metadata"]
         return True
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
-        return 'config'
+        return "config"
 
     def get_instance_id(self):
-        return 'iid-datasource-none'
+        return "iid-datasource-none"
 
     @property
     def is_disconnected(self):
@@ -48,4 +48,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceOVF.py b/cloudinit/sources/DataSourceOVF.py
index 5257a534..0df39824 100644
--- a/cloudinit/sources/DataSourceOVF.py
+++ b/cloudinit/sources/DataSourceOVF.py
@@ -16,32 +16,32 @@ from xml.dom import minidom
 
 from cloudinit import dmi
 from cloudinit import log as logging
-from cloudinit import safeyaml
-from cloudinit import sources
-from cloudinit import subp
-from cloudinit import util
-from cloudinit.sources.helpers.vmware.imc.config \
-    import Config
-from cloudinit.sources.helpers.vmware.imc.config_custom_script \
-    import PreCustomScript, PostCustomScript
-from cloudinit.sources.helpers.vmware.imc.config_file \
-    import ConfigFile
-from cloudinit.sources.helpers.vmware.imc.config_nic \
-    import NicConfigurator
-from cloudinit.sources.helpers.vmware.imc.config_passwd \
-    import PasswordConfigurator
-from cloudinit.sources.helpers.vmware.imc.guestcust_error \
-    import GuestCustErrorEnum
-from cloudinit.sources.helpers.vmware.imc.guestcust_event \
-    import GuestCustEventEnum as GuestCustEvent
-from cloudinit.sources.helpers.vmware.imc.guestcust_state \
-    import GuestCustStateEnum
+from cloudinit import safeyaml, sources, subp, util
+from cloudinit.sources.helpers.vmware.imc.config import Config
+from cloudinit.sources.helpers.vmware.imc.config_custom_script import (
+    PostCustomScript,
+    PreCustomScript,
+)
+from cloudinit.sources.helpers.vmware.imc.config_file import ConfigFile
+from cloudinit.sources.helpers.vmware.imc.config_nic import NicConfigurator
+from cloudinit.sources.helpers.vmware.imc.config_passwd import (
+    PasswordConfigurator,
+)
+from cloudinit.sources.helpers.vmware.imc.guestcust_error import (
+    GuestCustErrorEnum,
+)
+from cloudinit.sources.helpers.vmware.imc.guestcust_event import (
+    GuestCustEventEnum as GuestCustEvent,
+)
+from cloudinit.sources.helpers.vmware.imc.guestcust_state import (
+    GuestCustStateEnum,
+)
 from cloudinit.sources.helpers.vmware.imc.guestcust_util import (
     enable_nics,
     get_nics_to_enable,
-    set_customization_status,
     get_tools_config,
-    set_gc_status
+    set_customization_status,
+    set_gc_status,
 )
 
 LOG = logging.getLogger(__name__)
@@ -58,7 +58,7 @@ class DataSourceOVF(sources.DataSource):
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
         self.seed = None
-        self.seed_dir = os.path.join(paths.seed_dir, 'ovf')
+        self.seed_dir = os.path.join(paths.seed_dir, "ovf")
         self.environment = None
         self.cfg = {}
         self.supported_seed_starts = ("/", "file://")
@@ -96,36 +96,43 @@ class DataSourceOVF(sources.DataSource):
             (md, ud, cfg) = read_ovf_environment(contents)
             self.environment = contents
             found.append(seed)
-        elif system_type and 'vmware' in system_type.lower():
+        elif system_type and "vmware" in system_type.lower():
             LOG.debug("VMware Virtualization Platform found")
             allow_vmware_cust = False
             allow_raw_data = False
             if not self.vmware_customization_supported:
-                LOG.debug("Skipping the check for "
-                          "VMware Customization support")
+                LOG.debug(
+                    "Skipping the check for VMware Customization support"
+                )
             else:
                 allow_vmware_cust = not util.get_cfg_option_bool(
-                    self.sys_cfg, "disable_vmware_customization", True)
+                    self.sys_cfg, "disable_vmware_customization", True
+                )
                 allow_raw_data = util.get_cfg_option_bool(
-                    self.ds_cfg, "allow_raw_data", True)
+                    self.ds_cfg, "allow_raw_data", True
+                )
 
             if not (allow_vmware_cust or allow_raw_data):
-                LOG.debug(
-                    "Customization for VMware platform is disabled.")
+                LOG.debug("Customization for VMware platform is disabled.")
             else:
                 search_paths = (
-                    "/usr/lib/vmware-tools", "/usr/lib64/vmware-tools",
-                    "/usr/lib/open-vm-tools", "/usr/lib64/open-vm-tools",
+                    "/usr/lib/vmware-tools",
+                    "/usr/lib64/vmware-tools",
+                    "/usr/lib/open-vm-tools",
+                    "/usr/lib64/open-vm-tools",
                     "/usr/lib/x86_64-linux-gnu/open-vm-tools",
-                    "/usr/lib/aarch64-linux-gnu/open-vm-tools")
+                    "/usr/lib/aarch64-linux-gnu/open-vm-tools",
+                )
 
                 plugin = "libdeployPkgPlugin.so"
                 deployPkgPluginPath = None
                 for path in search_paths:
                     deployPkgPluginPath = search_file(path, plugin)
                     if deployPkgPluginPath:
-                        LOG.debug("Found the customization plugin at %s",
-                                  deployPkgPluginPath)
+                        LOG.debug(
+                            "Found the customization plugin at %s",
+                            deployPkgPluginPath,
+                        )
                         break
 
                 if deployPkgPluginPath:
@@ -140,7 +147,8 @@ class DataSourceOVF(sources.DataSource):
                         logfunc=LOG.debug,
                         msg="waiting for configuration file",
                         func=wait_for_imc_cfg_file,
-                        args=("cust.cfg", max_wait))
+                        args=("cust.cfg", max_wait),
+                    )
                 else:
                     LOG.debug("Did not find the customization plugin.")
 
@@ -149,30 +157,34 @@ class DataSourceOVF(sources.DataSource):
                     imcdirpath = os.path.dirname(vmwareImcConfigFilePath)
                     cf = ConfigFile(vmwareImcConfigFilePath)
                     self._vmware_cust_conf = Config(cf)
-                    LOG.debug("Found VMware Customization Config File at %s",
-                              vmwareImcConfigFilePath)
+                    LOG.debug(
+                        "Found VMware Customization Config File at %s",
+                        vmwareImcConfigFilePath,
+                    )
                     try:
                         (md_path, ud_path, nicspath) = collect_imc_file_paths(
-                            self._vmware_cust_conf)
+                            self._vmware_cust_conf
+                        )
                     except FileNotFoundError as e:
                         _raise_error_status(
                             "File(s) missing in directory",
                             e,
                             GuestCustEvent.GUESTCUST_EVENT_CUSTOMIZE_FAILED,
                             vmwareImcConfigFilePath,
-                            self._vmware_cust_conf)
+                            self._vmware_cust_conf,
+                        )
                     # Don't handle the customization for below 2 cases:
                     # 1. meta data is found, allow_raw_data is False.
                     # 2. no meta data is found, allow_vmware_cust is False.
                     if md_path and not allow_raw_data:
-                        LOG.debug(
-                            "Customization using raw data is disabled.")
+                        LOG.debug("Customization using raw data is disabled.")
                         # reset vmwareImcConfigFilePath to None to avoid
                         # customization for VMware platform
                         vmwareImcConfigFilePath = None
                     if md_path is None and not allow_vmware_cust:
                         LOG.debug(
-                            "Customization using VMware config is disabled.")
+                            "Customization using VMware config is disabled."
+                        )
                         vmwareImcConfigFilePath = None
                 else:
                     LOG.debug("Did not find VMware Customization Config File")
@@ -197,22 +209,25 @@ class DataSourceOVF(sources.DataSource):
                     e,
                     GuestCustErrorEnum.GUESTCUST_ERROR_WRONG_META_FORMAT,
                     vmwareImcConfigFilePath,
-                    self._vmware_cust_conf)
+                    self._vmware_cust_conf,
+                )
             except Exception as e:
                 _raise_error_status(
                     "Error loading cloud-init configuration",
                     e,
                     GuestCustEvent.GUESTCUST_EVENT_CUSTOMIZE_FAILED,
                     vmwareImcConfigFilePath,
-                    self._vmware_cust_conf)
+                    self._vmware_cust_conf,
+                )
 
             self._vmware_cust_found = True
-            found.append('vmware-tools')
+            found.append("vmware-tools")
 
             util.del_dir(imcdirpath)
             set_customization_status(
                 GuestCustStateEnum.GUESTCUST_STATE_DONE,
-                GuestCustErrorEnum.GUESTCUST_ERROR_SUCCESS)
+                GuestCustErrorEnum.GUESTCUST_ERROR_SUCCESS,
+            )
             set_gc_status(self._vmware_cust_conf, "Successful")
 
         elif vmwareImcConfigFilePath:
@@ -225,7 +240,8 @@ class DataSourceOVF(sources.DataSource):
                 self._vmware_nics_to_enable = get_nics_to_enable(nicspath)
                 product_marker = self._vmware_cust_conf.marker_id
                 hasmarkerfile = check_marker_exists(
-                    product_marker, os.path.join(self.paths.cloud_dir, 'data'))
+                    product_marker, os.path.join(self.paths.cloud_dir, "data")
+                )
                 special_customization = product_marker and not hasmarkerfile
                 customscript = self._vmware_cust_conf.custom_script_name
 
@@ -243,7 +259,8 @@ class DataSourceOVF(sources.DataSource):
                     custScriptConfig = get_tools_config(
                         CONFGROUPNAME_GUESTCUSTOMIZATION,
                         GUESTCUSTOMIZATION_ENABLE_CUST_SCRIPTS,
-                        defVal)
+                        defVal,
+                    )
                     if custScriptConfig.lower() != "true":
                         # Update the customization status if custom script
                         # is disabled
@@ -251,19 +268,21 @@ class DataSourceOVF(sources.DataSource):
                         LOG.debug(msg)
                         set_customization_status(
                             GuestCustStateEnum.GUESTCUST_STATE_RUNNING,
-                            GuestCustErrorEnum.GUESTCUST_ERROR_SCRIPT_DISABLED)
+                            GuestCustErrorEnum.GUESTCUST_ERROR_SCRIPT_DISABLED,
+                        )
                         raise RuntimeError(msg)
 
                 ccScriptsDir = os.path.join(
-                    self.paths.get_cpath("scripts"),
-                    "per-instance")
+                    self.paths.get_cpath("scripts"), "per-instance"
+                )
             except Exception as e:
                 _raise_error_status(
                     "Error parsing the customization Config File",
                     e,
                     GuestCustEvent.GUESTCUST_EVENT_CUSTOMIZE_FAILED,
                     vmwareImcConfigFilePath,
-                    self._vmware_cust_conf)
+                    self._vmware_cust_conf,
+                )
 
             if special_customization:
                 if customscript:
@@ -276,22 +295,22 @@ class DataSourceOVF(sources.DataSource):
                             e,
                             GuestCustEvent.GUESTCUST_EVENT_CUSTOMIZE_FAILED,
                             vmwareImcConfigFilePath,
-                            self._vmware_cust_conf)
+                            self._vmware_cust_conf,
+                        )
 
             try:
                 LOG.debug("Preparing the Network configuration")
                 self._network_config = get_network_config_from_conf(
-                    self._vmware_cust_conf,
-                    True,
-                    True,
-                    self.distro.osfamily)
+                    self._vmware_cust_conf, True, True, self.distro.osfamily
+                )
             except Exception as e:
                 _raise_error_status(
                     "Error preparing Network Configuration",
                     e,
                     GuestCustEvent.GUESTCUST_EVENT_NETWORK_SETUP_FAILED,
                     vmwareImcConfigFilePath,
-                    self._vmware_cust_conf)
+                    self._vmware_cust_conf,
+                )
 
             if special_customization:
                 LOG.debug("Applying password customization")
@@ -300,8 +319,9 @@ class DataSourceOVF(sources.DataSource):
                 try:
                     resetpwd = self._vmware_cust_conf.reset_password
                     if adminpwd or resetpwd:
-                        pwdConfigurator.configure(adminpwd, resetpwd,
-                                                  self.distro)
+                        pwdConfigurator.configure(
+                            adminpwd, resetpwd, self.distro
+                        )
                     else:
                         LOG.debug("Changing password is not needed")
                 except Exception as e:
@@ -310,13 +330,14 @@ class DataSourceOVF(sources.DataSource):
                         e,
                         GuestCustEvent.GUESTCUST_EVENT_CUSTOMIZE_FAILED,
                         vmwareImcConfigFilePath,
-                        self._vmware_cust_conf)
+                        self._vmware_cust_conf,
+                    )
 
                 if customscript:
                     try:
-                        postcust = PostCustomScript(customscript,
-                                                    imcdirpath,
-                                                    ccScriptsDir)
+                        postcust = PostCustomScript(
+                            customscript, imcdirpath, ccScriptsDir
+                        )
                         postcust.execute()
                     except Exception as e:
                         _raise_error_status(
@@ -324,23 +345,26 @@ class DataSourceOVF(sources.DataSource):
                             e,
                             GuestCustEvent.GUESTCUST_EVENT_CUSTOMIZE_FAILED,
                             vmwareImcConfigFilePath,
-                            self._vmware_cust_conf)
+                            self._vmware_cust_conf,
+                        )
 
             if product_marker:
                 try:
                     setup_marker_files(
                         product_marker,
-                        os.path.join(self.paths.cloud_dir, 'data'))
+                        os.path.join(self.paths.cloud_dir, "data"),
+                    )
                 except Exception as e:
                     _raise_error_status(
                         "Error creating marker files",
                         e,
                         GuestCustEvent.GUESTCUST_EVENT_CUSTOMIZE_FAILED,
                         vmwareImcConfigFilePath,
-                        self._vmware_cust_conf)
+                        self._vmware_cust_conf,
+                    )
 
             self._vmware_cust_found = True
-            found.append('vmware-tools')
+            found.append("vmware-tools")
 
             # TODO: Need to set the status to DONE only when the
             # customization is done successfully.
@@ -348,12 +372,15 @@ class DataSourceOVF(sources.DataSource):
             enable_nics(self._vmware_nics_to_enable)
             set_customization_status(
                 GuestCustStateEnum.GUESTCUST_STATE_DONE,
-                GuestCustErrorEnum.GUESTCUST_ERROR_SUCCESS)
+                GuestCustErrorEnum.GUESTCUST_ERROR_SUCCESS,
+            )
             set_gc_status(self._vmware_cust_conf, "Successful")
 
         else:
-            np = [('com.vmware.guestInfo', transport_vmware_guestinfo),
-                  ('iso', transport_iso9660)]
+            np = [
+                ("com.vmware.guestInfo", transport_vmware_guestinfo),
+                ("iso", transport_iso9660),
+            ]
             name = None
             for name, transfunc in np:
                 contents = transfunc()
@@ -362,24 +389,23 @@ class DataSourceOVF(sources.DataSource):
             if contents:
                 (md, ud, cfg) = read_ovf_environment(contents, True)
                 self.environment = contents
-                if 'network-config' in md and md['network-config']:
-                    self._network_config = md['network-config']
+                if "network-config" in md and md["network-config"]:
+                    self._network_config = md["network-config"]
                 found.append(name)
 
         # There was no OVF transports found
         if len(found) == 0:
             return False
 
-        if 'seedfrom' in md and md['seedfrom']:
-            seedfrom = md['seedfrom']
+        if "seedfrom" in md and md["seedfrom"]:
+            seedfrom = md["seedfrom"]
             seedfound = False
             for proto in self.supported_seed_starts:
                 if seedfrom.startswith(proto):
                     seedfound = proto
                     break
             if not seedfound:
-                LOG.debug("Seed from %s not supported by %s",
-                          seedfrom, self)
+                LOG.debug("Seed from %s not supported by %s", seedfrom, self)
                 return False
 
             (md_seed, ud, vd) = util.read_seeded(seedfrom, timeout=None)
@@ -400,14 +426,14 @@ class DataSourceOVF(sources.DataSource):
 
     def _get_subplatform(self):
         system_type = dmi.read_dmi_data("system-product-name").lower()
-        if system_type == 'vmware':
-            return 'vmware (%s)' % self.seed
-        return 'ovf (%s)' % self.seed
+        if system_type == "vmware":
+            return "vmware (%s)" % self.seed
+        return "ovf (%s)" % self.seed
 
     def get_public_ssh_keys(self):
-        if 'public-keys' not in self.metadata:
+        if "public-keys" not in self.metadata:
             return []
-        pks = self.metadata['public-keys']
+        pks = self.metadata["public-keys"]
         if isinstance(pks, (list)):
             return pks
         else:
@@ -427,14 +453,14 @@ class DataSourceOVF(sources.DataSource):
 class DataSourceOVFNet(DataSourceOVF):
     def __init__(self, sys_cfg, distro, paths):
         DataSourceOVF.__init__(self, sys_cfg, distro, paths)
-        self.seed_dir = os.path.join(paths.seed_dir, 'ovf-net')
+        self.seed_dir = os.path.join(paths.seed_dir, "ovf-net")
         self.supported_seed_starts = ("http://", "https://")
         self.vmware_customization_supported = False
 
 
 def get_max_wait_from_cfg(cfg):
     default_max_wait = 15
-    max_wait_cfg_option = 'vmware_cust_file_max_wait'
+    max_wait_cfg_option = "vmware_cust_file_max_wait"
     max_wait = default_max_wait
 
     if not cfg:
@@ -443,19 +469,27 @@ def get_max_wait_from_cfg(cfg):
     try:
         max_wait = int(cfg.get(max_wait_cfg_option, default_max_wait))
     except ValueError:
-        LOG.warning("Failed to get '%s', using %s",
-                    max_wait_cfg_option, default_max_wait)
+        LOG.warning(
+            "Failed to get '%s', using %s",
+            max_wait_cfg_option,
+            default_max_wait,
+        )
 
     if max_wait < 0:
-        LOG.warning("Invalid value '%s' for '%s', using '%s' instead",
-                    max_wait, max_wait_cfg_option, default_max_wait)
+        LOG.warning(
+            "Invalid value '%s' for '%s', using '%s' instead",
+            max_wait,
+            max_wait_cfg_option,
+            default_max_wait,
+        )
         max_wait = default_max_wait
 
     return max_wait
 
 
-def wait_for_imc_cfg_file(filename, maxwait=180, naplen=5,
-                          dirpath="/var/run/vmware-imc"):
+def wait_for_imc_cfg_file(
+    filename, maxwait=180, naplen=5, dirpath="/var/run/vmware-imc"
+):
     waited = 0
     if maxwait <= naplen:
         naplen = 1
@@ -470,24 +504,26 @@ def wait_for_imc_cfg_file(filename, maxwait=180, naplen=5,
     return None
 
 
-def get_network_config_from_conf(config, use_system_devices=True,
-                                 configure=False, osfamily=None):
+def get_network_config_from_conf(
+    config, use_system_devices=True, configure=False, osfamily=None
+):
     nicConfigurator = NicConfigurator(config.nics, use_system_devices)
     nics_cfg_list = nicConfigurator.generate(configure, osfamily)
 
-    return get_network_config(nics_cfg_list,
-                              config.name_servers,
-                              config.dns_suffixes)
+    return get_network_config(
+        nics_cfg_list, config.name_servers, config.dns_suffixes
+    )
 
 
 def get_network_config(nics=None, nameservers=None, search=None):
     config_list = nics
 
     if nameservers or search:
-        config_list.append({'type': 'nameserver', 'address': nameservers,
-                            'search': search})
+        config_list.append(
+            {"type": "nameserver", "address": nameservers, "search": search}
+        )
 
-    return {'version': 1, 'config': config_list}
+    return {"version": 1, "config": config_list}
 
 
 # This will return a dict with some content
@@ -498,14 +534,14 @@ def read_vmware_imc(config):
     ud = None
     if config.host_name:
         if config.domain_name:
-            md['local-hostname'] = config.host_name + "." + config.domain_name
+            md["local-hostname"] = config.host_name + "." + config.domain_name
         else:
-            md['local-hostname'] = config.host_name
+            md["local-hostname"] = config.host_name
 
     if config.timezone:
-        cfg['timezone'] = config.timezone
+        cfg["timezone"] = config.timezone
 
-    md['instance-id'] = "iid-vmware-imc"
+    md["instance-id"] = "iid-vmware-imc"
     return (md, ud, cfg)
 
 
@@ -516,11 +552,11 @@ def read_ovf_environment(contents, read_network=False):
     md = {}
     cfg = {}
     ud = None
-    cfg_props = ['password']
-    md_props = ['seedfrom', 'local-hostname', 'public-keys', 'instance-id']
-    network_props = ['network-config']
+    cfg_props = ["password"]
+    md_props = ["seedfrom", "local-hostname", "public-keys", "instance-id"]
+    network_props = ["network-config"]
     for (prop, val) in props.items():
-        if prop == 'hostname':
+        if prop == "hostname":
             prop = "local-hostname"
         if prop in md_props:
             md[prop] = val
@@ -529,7 +565,7 @@ def read_ovf_environment(contents, read_network=False):
         elif prop in network_props and read_network:
             try:
                 network_config = base64.b64decode(val.encode())
-                md[prop] = safeload_yaml_or_dict(network_config).get('network')
+                md[prop] = safeload_yaml_or_dict(network_config).get("network")
             except Exception:
                 LOG.debug("Ignore network-config in wrong format")
         elif prop == "user-data":
@@ -601,12 +637,12 @@ def transport_iso9660(require_iso=True):
     # Go through mounts to see if it was already mounted
     mounts = util.mounts()
     for (dev, info) in mounts.items():
-        fstype = info['fstype']
+        fstype = info["fstype"]
         if fstype != "iso9660" and require_iso:
             continue
         if not maybe_cdrom_device(dev):
             continue
-        mp = info['mountpoint']
+        mp = info["mountpoint"]
         (_fname, contents) = get_ovf_env(mp)
         if contents is not False:
             return contents
@@ -617,9 +653,11 @@ def transport_iso9660(require_iso=True):
         mtype = None
 
     # generate a list of devices with mtype filesystem, filter by regex
-    devs = [dev for dev in
-            util.find_devs_with("TYPE=%s" % mtype if mtype else None)
-            if maybe_cdrom_device(dev)]
+    devs = [
+        dev
+        for dev in util.find_devs_with("TYPE=%s" % mtype if mtype else None)
+        if maybe_cdrom_device(dev)
+    ]
     for dev in devs:
         try:
             (_fname, contents) = util.mount_cb(dev, get_ovf_env, mtype=mtype)
@@ -674,15 +712,17 @@ def get_properties(contents):
 
     # could also check here that elem.namespaceURI ==
     #   "http://schemas.dmtf.org/ovf/environment/1"
-    propSections = find_child(dom.documentElement,
-                              lambda n: n.localName == "PropertySection")
+    propSections = find_child(
+        dom.documentElement, lambda n: n.localName == "PropertySection"
+    )
 
     if len(propSections) == 0:
         raise XmlError("No 'PropertySection's")
 
     props = {}
-    propElems = find_child(propSections[0],
-                           (lambda n: n.localName == "Property"))
+    propElems = find_child(
+        propSections[0], (lambda n: n.localName == "Property")
+    )
 
     for elem in propElems:
         key = elem.attributes.getNamedItemNS(envNsURI, "key").value
@@ -709,7 +749,7 @@ class XmlError(Exception):
 
 # Used to match classes to dependencies
 datasources = (
-    (DataSourceOVF, (sources.DEP_FILESYSTEM, )),
+    (DataSourceOVF, (sources.DEP_FILESYSTEM,)),
     (DataSourceOVFNet, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
 )
 
@@ -753,7 +793,7 @@ def setup_marker_files(markerid, marker_dir):
     for fname in os.listdir(marker_dir):
         if fname.startswith(".markerfile"):
             util.del_file(os.path.join(marker_dir, fname))
-    open(markerfile, 'w').close()
+    open(markerfile, "w").close()
 
 
 def _raise_error_status(prefix, error, event, config_file, conf):
@@ -761,10 +801,8 @@ def _raise_error_status(prefix, error, event, config_file, conf):
     Raise error and send customization status to the underlying VMware
     Virtualization Platform. Also, cleanup the imc directory.
     """
-    LOG.debug('%s: %s', prefix, error)
-    set_customization_status(
-        GuestCustStateEnum.GUESTCUST_STATE_RUNNING,
-        event)
+    LOG.debug("%s: %s", prefix, error)
+    set_customization_status(GuestCustStateEnum.GUESTCUST_STATE_RUNNING, event)
     set_gc_status(conf, prefix)
     util.del_dir(os.path.dirname(config_file))
     raise error
@@ -780,16 +818,15 @@ def load_cloudinit_data(md_path, ud_path):
 
     @raises: FileNotFoundError if md_path or ud_path are absent
     """
-    LOG.debug('load meta data from: %s: user data from: %s',
-              md_path, ud_path)
+    LOG.debug("load meta data from: %s: user data from: %s", md_path, ud_path)
     md = {}
     ud = None
     network = None
 
     md = safeload_yaml_or_dict(util.load_file(md_path))
 
-    if 'network' in md:
-        network = md['network']
+    if "network" in md:
+        network = md["network"]
 
     if ud_path:
         ud = util.load_file(ud_path).replace("\r", "")
@@ -797,18 +834,18 @@ def load_cloudinit_data(md_path, ud_path):
 
 
 def safeload_yaml_or_dict(data):
-    '''
+    """
     The meta data could be JSON or YAML. Since YAML is a strict superset of
     JSON, we will unmarshal the data as YAML. If data is None then a new
     dictionary is returned.
-    '''
+    """
     if not data:
         return {}
     return safeyaml.load(data)
 
 
 def collect_imc_file_paths(cust_conf):
-    '''
+    """
     collect all the other imc files.
 
     metadata is preferred to nics.txt configuration data.
@@ -822,7 +859,7 @@ def collect_imc_file_paths(cust_conf):
              2. user provided metadata (md_path, None, None)
              3. user-provided network config (None, None, nics_path)
              4. No config found (None, None, None)
-    '''
+    """
     md_path = None
     ud_path = None
     nics_path = None
@@ -830,19 +867,21 @@ def collect_imc_file_paths(cust_conf):
     if md_file:
         md_path = os.path.join(VMWARE_IMC_DIR, md_file)
         if not os.path.exists(md_path):
-            raise FileNotFoundError("meta data file is not found: %s"
-                                    % md_path)
+            raise FileNotFoundError(
+                "meta data file is not found: %s" % md_path
+            )
 
         ud_file = cust_conf.user_data_name
         if ud_file:
             ud_path = os.path.join(VMWARE_IMC_DIR, ud_file)
             if not os.path.exists(ud_path):
-                raise FileNotFoundError("user data file is not found: %s"
-                                        % ud_path)
+                raise FileNotFoundError(
+                    "user data file is not found: %s" % ud_path
+                )
     else:
         nics_path = os.path.join(VMWARE_IMC_DIR, "nics.txt")
         if not os.path.exists(nics_path):
-            LOG.debug('%s does not exist.', nics_path)
+            LOG.debug("%s does not exist.", nics_path)
             nics_path = None
 
     return md_path, ud_path, nics_path
diff --git a/cloudinit/sources/DataSourceOpenNebula.py b/cloudinit/sources/DataSourceOpenNebula.py
index 21603fbd..9734d1a8 100644
--- a/cloudinit/sources/DataSourceOpenNebula.py
+++ b/cloudinit/sources/DataSourceOpenNebula.py
@@ -20,16 +20,12 @@ import re
 import string
 
 from cloudinit import log as logging
-from cloudinit import net
-from cloudinit import sources
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import net, sources, subp, util
 
 LOG = logging.getLogger(__name__)
 
 DEFAULT_IID = "iid-dsopennebula"
-DEFAULT_PARSEUSER = 'nobody'
+DEFAULT_PARSEUSER = "nobody"
 CONTEXT_DISK_FILES = ["context.sh"]
 
 
@@ -40,7 +36,7 @@ class DataSourceOpenNebula(sources.DataSource):
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
         self.seed = None
-        self.seed_dir = os.path.join(paths.seed_dir, 'opennebula')
+        self.seed_dir = os.path.join(paths.seed_dir, "opennebula")
 
     def __str__(self):
         root = sources.DataSource.__str__(self)
@@ -53,8 +49,8 @@ class DataSourceOpenNebula(sources.DataSource):
 
         # decide parseuser for context.sh shell reader
         parseuser = DEFAULT_PARSEUSER
-        if 'parseuser' in self.ds_cfg:
-            parseuser = self.ds_cfg.get('parseuser')
+        if "parseuser" in self.ds_cfg:
+            parseuser = self.ds_cfg.get("parseuser")
 
         candidates = [self.seed_dir]
         candidates.extend(find_candidate_devs())
@@ -90,29 +86,30 @@ class DataSourceOpenNebula(sources.DataSource):
             return False
 
         # merge fetched metadata with datasource defaults
-        md = results['metadata']
+        md = results["metadata"]
         md = util.mergemanydict([md, defaults])
 
         # check for valid user specified dsmode
         self.dsmode = self._determine_dsmode(
-            [results.get('DSMODE'), self.ds_cfg.get('dsmode')])
+            [results.get("DSMODE"), self.ds_cfg.get("dsmode")]
+        )
 
         if self.dsmode == sources.DSMODE_DISABLED:
             return False
 
         self.seed = seed
-        self.network = results.get('network-interfaces')
+        self.network = results.get("network-interfaces")
         self.metadata = md
-        self.userdata_raw = results.get('userdata')
+        self.userdata_raw = results.get("userdata")
         return True
 
     def _get_subplatform(self):
         """Return the subplatform metadata source details."""
         if self.seed_dir in self.seed:
-            subplatform_type = 'seed-dir'
+            subplatform_type = "seed-dir"
         else:
-            subplatform_type = 'config-disk'
-        return '%s (%s)' % (subplatform_type, self.seed)
+            subplatform_type = "config-disk"
+        return "%s (%s)" % (subplatform_type, self.seed)
 
     @property
     def network_config(self):
@@ -144,19 +141,25 @@ class OpenNebulaNetwork(object):
         if system_nics_by_mac is None:
             system_nics_by_mac = get_physical_nics_by_mac(distro)
         self.ifaces = collections.OrderedDict(
-            [k for k in sorted(system_nics_by_mac.items(),
-                               key=lambda k: net.natural_sort_key(k[1]))])
+            [
+                k
+                for k in sorted(
+                    system_nics_by_mac.items(),
+                    key=lambda k: net.natural_sort_key(k[1]),
+                )
+            ]
+        )
 
         # OpenNebula 4.14+ provide macaddr for ETHX in variable ETH_MAC.
         # context_devname provides {mac.lower():ETHX, mac2.lower():ETHX}
         self.context_devname = {}
         for k, v in context.items():
-            m = re.match(r'^(.+)_MAC$', k)
+            m = re.match(r"^(.+)_MAC$", k)
             if m:
                 self.context_devname[v.lower()] = m.group(1)
 
     def mac2ip(self, mac):
-        return '.'.join([str(int(c, 16)) for c in mac.split(':')[2:]])
+        return ".".join([str(int(c, 16)) for c in mac.split(":")[2:]])
 
     def mac2network(self, mac):
         return self.mac2ip(mac).rpartition(".")[0] + ".0"
@@ -164,12 +167,12 @@ class OpenNebulaNetwork(object):
     def get_nameservers(self, dev):
         nameservers = {}
         dns = self.get_field(dev, "dns", "").split()
-        dns.extend(self.context.get('DNS', "").split())
+        dns.extend(self.context.get("DNS", "").split())
         if dns:
-            nameservers['addresses'] = dns
+            nameservers["addresses"] = dns
         search_domain = self.get_field(dev, "search_domain", "").split()
         if search_domain:
-            nameservers['search'] = search_domain
+            nameservers["search"] = search_domain
         return nameservers
 
     def get_mtu(self, dev):
@@ -198,8 +201,9 @@ class OpenNebulaNetwork(object):
         # OpenNebula 6.1.80 introduced new context parameter ETHx_IP6_GATEWAY
         # to replace old ETHx_GATEWAY6. Old ETHx_GATEWAY6 will be removed in
         # OpenNebula 6.4.0 (https://github.com/OpenNebula/one/issues/5536).
-        return self.get_field(dev, "ip6_gateway",
-                              self.get_field(dev, "gateway6"))
+        return self.get_field(
+            dev, "ip6_gateway", self.get_field(dev, "gateway6")
+        )
 
     def get_mask(self, dev):
         return self.get_field(dev, "mask", "255.255.255.0")
@@ -212,14 +216,21 @@ class OpenNebulaNetwork(object):
 
         context stores <dev>_<NAME> (example: eth0_DOMAIN).
         an empty string for value will return default."""
-        val = self.context.get('_'.join((dev, name,)).upper())
+        val = self.context.get(
+            "_".join(
+                (
+                    dev,
+                    name,
+                )
+            ).upper()
+        )
         # allow empty string to return the default.
         return default if val in (None, "") else val
 
     def gen_conf(self):
         netconf = {}
-        netconf['version'] = 2
-        netconf['ethernets'] = {}
+        netconf["version"] = 2
+        netconf["ethernets"] = {}
 
         ethernets = {}
         for mac, dev in self.ifaces.items():
@@ -232,46 +243,46 @@ class OpenNebulaNetwork(object):
             devconf = {}
 
             # Set MAC address
-            devconf['match'] = {'macaddress': mac}
+            devconf["match"] = {"macaddress": mac}
 
             # Set IPv4 address
-            devconf['addresses'] = []
+            devconf["addresses"] = []
             mask = self.get_mask(c_dev)
             prefix = str(net.mask_to_net_prefix(mask))
-            devconf['addresses'].append(
-                self.get_ip(c_dev, mac) + '/' + prefix)
+            devconf["addresses"].append(self.get_ip(c_dev, mac) + "/" + prefix)
 
             # Set IPv6 Global and ULA address
             addresses6 = self.get_ip6(c_dev)
             if addresses6:
                 prefix6 = self.get_ip6_prefix(c_dev)
-                devconf['addresses'].extend(
-                    [i + '/' + prefix6 for i in addresses6])
+                devconf["addresses"].extend(
+                    [i + "/" + prefix6 for i in addresses6]
+                )
 
             # Set IPv4 default gateway
             gateway = self.get_gateway(c_dev)
             if gateway:
-                devconf['gateway4'] = gateway
+                devconf["gateway4"] = gateway
 
             # Set IPv6 default gateway
             gateway6 = self.get_gateway6(c_dev)
             if gateway6:
-                devconf['gateway6'] = gateway6
+                devconf["gateway6"] = gateway6
 
             # Set DNS servers and search domains
             nameservers = self.get_nameservers(c_dev)
             if nameservers:
-                devconf['nameservers'] = nameservers
+                devconf["nameservers"] = nameservers
 
             # Set MTU size
             mtu = self.get_mtu(c_dev)
             if mtu:
-                devconf['mtu'] = mtu
+                devconf["mtu"] = mtu
 
             ethernets[dev] = devconf
 
-        netconf['ethernets'] = ethernets
-        return(netconf)
+        netconf["ethernets"] = ethernets
+        return netconf
 
 
 def find_candidate_devs():
@@ -279,7 +290,7 @@ def find_candidate_devs():
     Return a list of devices that may contain the context disk.
     """
     combined = []
-    for f in ('LABEL=CONTEXT', 'LABEL=CDROM', 'TYPE=iso9660'):
+    for f in ("LABEL=CONTEXT", "LABEL=CDROM", "TYPE=iso9660"):
         devs = util.find_devs_with(f)
         devs.sort()
         for d in devs:
@@ -290,16 +301,17 @@ def find_candidate_devs():
 
 
 def switch_user_cmd(user):
-    return ['sudo', '-u', user]
+    return ["sudo", "-u", user]
 
 
-def parse_shell_config(content, keylist=None, bash=None, asuser=None,
-                       switch_user_cb=None):
+def parse_shell_config(
+    content, keylist=None, bash=None, asuser=None, switch_user_cb=None
+):
 
     if isinstance(bash, str):
         bash = [bash]
     elif bash is None:
-        bash = ['bash', '-e']
+        bash = ["bash", "-e"]
 
     if switch_user_cb is None:
         switch_user_cb = switch_user_cmd
@@ -313,17 +325,24 @@ def parse_shell_config(content, keylist=None, bash=None, asuser=None,
         keylist = allvars
         keylist_in = []
 
-    setup = '\n'.join(('__v="";', '',))
+    setup = "\n".join(
+        (
+            '__v="";',
+            "",
+        )
+    )
 
     def varprinter(vlist):
         # output '\0'.join(['_start_', key=value NULL for vars in vlist]
-        return '\n'.join((
-            'printf "%s\\0" _start_',
-            'for __v in %s; do' % ' '.join(vlist),
-            '   printf "%s=%s\\0" "$__v" "${!__v}";',
-            'done',
-            ''
-        ))
+        return "\n".join(
+            (
+                'printf "%s\\0" _start_',
+                "for __v in %s; do" % " ".join(vlist),
+                '   printf "%s=%s\\0" "$__v" "${!__v}";',
+                "done",
+                "",
+            )
+        )
 
     # the rendered 'bcmd' is bash syntax that does
     # setup: declare variables we use (so they show up in 'all')
@@ -336,12 +355,15 @@ def parse_shell_config(content, keylist=None, bash=None, asuser=None,
     #   key=value (for each preset variable)
     #   literal '_start_'
     #   key=value (for each post set variable)
-    bcmd = ('unset IFS\n' +
-            setup +
-            varprinter(allvars) +
-            '{\n%s\n\n:\n} > /dev/null\n' % content +
-            'unset IFS\n' +
-            varprinter(keylist) + "\n")
+    bcmd = (
+        "unset IFS\n"
+        + setup
+        + varprinter(allvars)
+        + "{\n%s\n\n:\n} > /dev/null\n" % content
+        + "unset IFS\n"
+        + varprinter(keylist)
+        + "\n"
+    )
 
     cmd = []
     if asuser is not None:
@@ -353,8 +375,14 @@ def parse_shell_config(content, keylist=None, bash=None, asuser=None,
 
     # exclude vars in bash that change on their own or that we used
     excluded = (
-        "EPOCHREALTIME", "EPOCHSECONDS", "RANDOM", "LINENO", "SECONDS", "_",
-        "SRANDOM", "__v",
+        "EPOCHREALTIME",
+        "EPOCHSECONDS",
+        "RANDOM",
+        "LINENO",
+        "SECONDS",
+        "_",
+        "SRANDOM",
+        "__v",
     )
     preset = {}
     ret = {}
@@ -368,8 +396,9 @@ def parse_shell_config(content, keylist=None, bash=None, asuser=None,
             (key, val) = line.split("=", 1)
             if target is preset:
                 preset[key] = val
-            elif (key not in excluded and
-                  (key in keylist_in or preset.get(key) != val)):
+            elif key not in excluded and (
+                key in keylist_in or preset.get(key) != val
+            ):
                 ret[key] = val
         except ValueError:
             if line != "_start_":
@@ -398,7 +427,7 @@ def read_context_disk_dir(source_dir, distro, asuser=None):
         raise NonContextDiskDir("%s: %s" % (source_dir, "no files found"))
 
     context = {}
-    results = {'userdata': None, 'metadata': {}}
+    results = {"userdata": None, "metadata": {}}
 
     if "context.sh" in found:
         if asuser is not None:
@@ -407,10 +436,11 @@ def read_context_disk_dir(source_dir, distro, asuser=None):
             except KeyError as e:
                 raise BrokenContextDiskDir(
                     "configured user '{user}' does not exist".format(
-                        user=asuser)
+                        user=asuser
+                    )
                 ) from e
         try:
-            path = os.path.join(source_dir, 'context.sh')
+            path = os.path.join(source_dir, "context.sh")
             content = util.load_file(path)
             context = parse_shell_config(content, asuser=asuser)
         except subp.ProcessExecutionError as e:
@@ -427,7 +457,7 @@ def read_context_disk_dir(source_dir, distro, asuser=None):
     if not context:
         return results
 
-    results['metadata'] = context
+    results["metadata"] = context
 
     # process single or multiple SSH keys
     ssh_key_var = None
@@ -438,40 +468,41 @@ def read_context_disk_dir(source_dir, distro, asuser=None):
 
     if ssh_key_var:
         lines = context.get(ssh_key_var).splitlines()
-        results['metadata']['public-keys'] = [
+        results["metadata"]["public-keys"] = [
             line for line in lines if len(line) and not line.startswith("#")
         ]
 
     # custom hostname -- try hostname or leave cloud-init
     # itself create hostname from IP address later
-    for k in ('SET_HOSTNAME', 'HOSTNAME', 'PUBLIC_IP', 'IP_PUBLIC', 'ETH0_IP'):
+    for k in ("SET_HOSTNAME", "HOSTNAME", "PUBLIC_IP", "IP_PUBLIC", "ETH0_IP"):
         if k in context:
-            results['metadata']['local-hostname'] = context[k]
+            results["metadata"]["local-hostname"] = context[k]
             break
 
     # raw user data
     if "USER_DATA" in context:
-        results['userdata'] = context["USER_DATA"]
+        results["userdata"] = context["USER_DATA"]
     elif "USERDATA" in context:
-        results['userdata'] = context["USERDATA"]
+        results["userdata"] = context["USERDATA"]
 
     # b64decode user data if necessary (default)
-    if 'userdata' in results:
-        encoding = context.get('USERDATA_ENCODING',
-                               context.get('USER_DATA_ENCODING'))
+    if "userdata" in results:
+        encoding = context.get(
+            "USERDATA_ENCODING", context.get("USER_DATA_ENCODING")
+        )
         if encoding == "base64":
             try:
-                results['userdata'] = util.b64d(results['userdata'])
+                results["userdata"] = util.b64d(results["userdata"])
             except TypeError:
                 LOG.warning("Failed base64 decoding of userdata")
 
     # generate Network Configuration v2
     # only if there are any required context variables
     # http://docs.opennebula.org/5.4/operation/references/template.html#context-section
-    ipaddr_keys = [k for k in context if re.match(r'^ETH\d+_IP.*$', k)]
+    ipaddr_keys = [k for k in context if re.match(r"^ETH\d+_IP.*$", k)]
     if ipaddr_keys:
         onet = OpenNebulaNetwork(context, distro)
-        results['network-interfaces'] = onet.gen_conf()
+        results["network-interfaces"] = onet.gen_conf()
 
     return results
 
@@ -488,7 +519,7 @@ DataSourceOpenNebulaNet = DataSourceOpenNebula
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceOpenNebula, (sources.DEP_FILESYSTEM, )),
+    (DataSourceOpenNebula, (sources.DEP_FILESYSTEM,)),
 ]
 
 
@@ -496,4 +527,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceOpenStack.py b/cloudinit/sources/DataSourceOpenStack.py
index a85b71d7..6878528d 100644
--- a/cloudinit/sources/DataSourceOpenStack.py
+++ b/cloudinit/sources/DataSourceOpenStack.py
@@ -8,13 +8,11 @@ import time
 
 from cloudinit import dmi
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import url_helper
-from cloudinit import util
+from cloudinit import sources, url_helper, util
 from cloudinit.event import EventScope, EventType
 from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError
-from cloudinit.sources.helpers import openstack
 from cloudinit.sources import DataSourceOracle as oracle
+from cloudinit.sources.helpers import openstack
 
 LOG = logging.getLogger(__name__)
 
@@ -26,13 +24,13 @@ DEFAULT_METADATA = {
 }
 
 # OpenStack DMI constants
-DMI_PRODUCT_NOVA = 'OpenStack Nova'
-DMI_PRODUCT_COMPUTE = 'OpenStack Compute'
+DMI_PRODUCT_NOVA = "OpenStack Nova"
+DMI_PRODUCT_COMPUTE = "OpenStack Compute"
 VALID_DMI_PRODUCT_NAMES = [DMI_PRODUCT_NOVA, DMI_PRODUCT_COMPUTE]
-DMI_ASSET_TAG_OPENTELEKOM = 'OpenTelekomCloud'
+DMI_ASSET_TAG_OPENTELEKOM = "OpenTelekomCloud"
 # See github.com/sapcc/helm-charts/blob/master/openstack/nova/values.yaml
 # -> compute.defaults.vmware.smbios_asset_tag for this value
-DMI_ASSET_TAG_SAPCCLOUD = 'SAP CCloud VM'
+DMI_ASSET_TAG_SAPCCLOUD = "SAP CCloud VM"
 VALID_DMI_ASSET_TAGS = VALID_DMI_PRODUCT_NAMES
 VALID_DMI_ASSET_TAGS += [DMI_ASSET_TAG_OPENTELEKOM, DMI_ASSET_TAG_SAPCCLOUD]
 
@@ -46,12 +44,14 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
     # Whether we want to get network configuration from the metadata service.
     perform_dhcp_setup = False
 
-    supported_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-        EventType.BOOT,
-        EventType.BOOT_LEGACY,
-        EventType.HOTPLUG
-    }}
+    supported_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+            EventType.BOOT,
+            EventType.BOOT_LEGACY,
+            EventType.HOTPLUG,
+        }
+    }
 
     def __init__(self, sys_cfg, distro, paths):
         super(DataSourceOpenStack, self).__init__(sys_cfg, distro, paths)
@@ -71,8 +71,10 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
         urls = self.ds_cfg.get("metadata_urls", [DEF_MD_URL])
         filtered = [x for x in urls if util.is_resolvable_url(x)]
         if set(filtered) != set(urls):
-            LOG.debug("Removed the following from metadata urls: %s",
-                      list((set(urls) - set(filtered))))
+            LOG.debug(
+                "Removed the following from metadata urls: %s",
+                list((set(urls) - set(filtered))),
+            )
         if len(filtered):
             urls = filtered
         else:
@@ -82,20 +84,25 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
         md_urls = []
         url2base = {}
         for url in urls:
-            md_url = url_helper.combine_url(url, 'openstack')
+            md_url = url_helper.combine_url(url, "openstack")
             md_urls.append(md_url)
             url2base[md_url] = url
 
         url_params = self.get_url_params()
         start_time = time.time()
         avail_url, _response = url_helper.wait_for_url(
-            urls=md_urls, max_wait=url_params.max_wait_seconds,
-            timeout=url_params.timeout_seconds)
+            urls=md_urls,
+            max_wait=url_params.max_wait_seconds,
+            timeout=url_params.timeout_seconds,
+        )
         if avail_url:
             LOG.debug("Using metadata source: '%s'", url2base[avail_url])
         else:
-            LOG.debug("Giving up on OpenStack md from %s after %s seconds",
-                      md_urls, int(time.time() - start_time))
+            LOG.debug(
+                "Giving up on OpenStack md from %s after %s seconds",
+                md_urls,
+                int(time.time() - start_time),
+            )
 
         self.metadata_address = url2base.get(avail_url)
         return bool(avail_url)
@@ -113,18 +120,20 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
         # RELEASE_BLOCKER: SRU to Xenial and Artful SRU should not provide
         # network_config by default unless configured in /etc/cloud/cloud.cfg*.
         # Patch Xenial and Artful before release to default to False.
-        if util.is_false(self.ds_cfg.get('apply_network_config', True)):
+        if util.is_false(self.ds_cfg.get("apply_network_config", True)):
             self._network_config = None
             return self._network_config
         if self.network_json == sources.UNSET:
             # this would happen if get_data hadn't been called. leave as UNSET
             LOG.warning(
-                'Unexpected call to network_config when network_json is None.')
+                "Unexpected call to network_config when network_json is None."
+            )
             return None
 
-        LOG.debug('network config provided via network_json')
+        LOG.debug("network config provided via network_json")
         self._network_config = openstack.convert_net_json(
-            self.network_json, known_macs=None)
+            self.network_json, known_macs=None
+        )
         return self._network_config
 
     def _get_data(self):
@@ -134,7 +143,7 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
             False when unable to contact metadata service or when metadata
             format is invalid or disabled.
         """
-        oracle_considered = 'Oracle' in self.sys_cfg.get('datasource_list')
+        oracle_considered = "Oracle" in self.sys_cfg.get("datasource_list")
         if not detect_openstack(accept_oracle=not oracle_considered):
             return False
 
@@ -142,8 +151,10 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
             try:
                 with EphemeralDHCPv4(self.fallback_interface):
                     results = util.log_time(
-                        logfunc=LOG.debug, msg='Crawl of metadata service',
-                        func=self._crawl_metadata)
+                        logfunc=LOG.debug,
+                        msg="Crawl of metadata service",
+                        func=self._crawl_metadata,
+                    )
             except (NoDHCPLeaseError, sources.InvalidMetaDataException) as e:
                 util.logexc(LOG, str(e))
                 return False
@@ -154,19 +165,19 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
                 util.logexc(LOG, str(e))
                 return False
 
-        self.dsmode = self._determine_dsmode([results.get('dsmode')])
+        self.dsmode = self._determine_dsmode([results.get("dsmode")])
         if self.dsmode == sources.DSMODE_DISABLED:
             return False
-        md = results.get('metadata', {})
+        md = results.get("metadata", {})
         md = util.mergemanydict([md, DEFAULT_METADATA])
         self.metadata = md
-        self.ec2_metadata = results.get('ec2-metadata')
-        self.network_json = results.get('networkdata')
-        self.userdata_raw = results.get('userdata')
-        self.version = results['version']
-        self.files.update(results.get('files', {}))
+        self.ec2_metadata = results.get("ec2-metadata")
+        self.network_json = results.get("networkdata")
+        self.userdata_raw = results.get("userdata")
+        self.version = results["version"]
+        self.files.update(results.get("files", {}))
 
-        vd = results.get('vendordata')
+        vd = results.get("vendordata")
         self.vendordata_pure = vd
         try:
             self.vendordata_raw = sources.convert_vendordata(vd)
@@ -174,7 +185,7 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
             LOG.warning("Invalid content in vendor-data: %s", e)
             self.vendordata_raw = None
 
-        vd2 = results.get('vendordata2')
+        vd2 = results.get("vendordata2")
         self.vendordata2_pure = vd2
         try:
             self.vendordata2_raw = sources.convert_vendordata(vd2)
@@ -194,26 +205,35 @@ class DataSourceOpenStack(openstack.SourceMixin, sources.DataSource):
         try:
             if not self.wait_for_metadata_service():
                 raise sources.InvalidMetaDataException(
-                    'No active metadata service found')
+                    "No active metadata service found"
+                )
         except IOError as e:
             raise sources.InvalidMetaDataException(
-                'IOError contacting metadata service: {error}'.format(
-                    error=str(e)))
+                "IOError contacting metadata service: {error}".format(
+                    error=str(e)
+                )
+            )
 
         url_params = self.get_url_params()
 
         try:
             result = util.log_time(
-                LOG.debug, 'Crawl of openstack metadata service',
-                read_metadata_service, args=[self.metadata_address],
-                kwargs={'ssl_details': self.ssl_details,
-                        'retries': url_params.num_retries,
-                        'timeout': url_params.timeout_seconds})
+                LOG.debug,
+                "Crawl of openstack metadata service",
+                read_metadata_service,
+                args=[self.metadata_address],
+                kwargs={
+                    "ssl_details": self.ssl_details,
+                    "retries": url_params.num_retries,
+                    "timeout": url_params.timeout_seconds,
+                },
+            )
         except openstack.NonReadable as e:
             raise sources.InvalidMetaDataException(str(e))
         except (openstack.BrokenMetadata, IOError) as e:
-            msg = 'Broken metadata address {addr}'.format(
-                addr=self.metadata_address)
+            msg = "Broken metadata address {addr}".format(
+                addr=self.metadata_address
+            )
             raise sources.InvalidMetaDataException(msg) from e
         return result
 
@@ -230,10 +250,10 @@ class DataSourceOpenStackLocal(DataSourceOpenStack):
     perform_dhcp_setup = True  # Get metadata network config if present
 
 
-def read_metadata_service(base_url, ssl_details=None,
-                          timeout=5, retries=5):
-    reader = openstack.MetadataReader(base_url, ssl_details=ssl_details,
-                                      timeout=timeout, retries=retries)
+def read_metadata_service(base_url, ssl_details=None, timeout=5, retries=5):
+    reader = openstack.MetadataReader(
+        base_url, ssl_details=ssl_details, timeout=timeout, retries=retries
+    )
     return reader.read_v2()
 
 
@@ -241,14 +261,14 @@ def detect_openstack(accept_oracle=False):
     """Return True when a potential OpenStack platform is detected."""
     if not util.is_x86():
         return True  # Non-Intel cpus don't properly report dmi product names
-    product_name = dmi.read_dmi_data('system-product-name')
+    product_name = dmi.read_dmi_data("system-product-name")
     if product_name in VALID_DMI_PRODUCT_NAMES:
         return True
-    elif dmi.read_dmi_data('chassis-asset-tag') in VALID_DMI_ASSET_TAGS:
+    elif dmi.read_dmi_data("chassis-asset-tag") in VALID_DMI_ASSET_TAGS:
         return True
     elif accept_oracle and oracle._is_platform_viable():
         return True
-    elif util.get_proc_env(1).get('product_name') == DMI_PRODUCT_NOVA:
+    elif util.get_proc_env(1).get("product_name") == DMI_PRODUCT_NOVA:
         return True
     return False
 
@@ -264,4 +284,5 @@ datasources = [
 def get_datasource_list(depends):
     return sources.list_from_depends(depends, datasources)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceOracle.py b/cloudinit/sources/DataSourceOracle.py
index fbb5312a..3f918672 100644
--- a/cloudinit/sources/DataSourceOracle.py
+++ b/cloudinit/sources/DataSourceOracle.py
@@ -32,7 +32,7 @@ LOG = logging.getLogger(__name__)
 
 BUILTIN_DS_CONFIG = {
     # Don't use IMDS to configure secondary NICs by default
-    'configure_secondary_nics': False,
+    "configure_secondary_nics": False,
 }
 CHASSIS_ASSET_TAG = "OracleCloud.com"
 METADATA_ROOT = "http://169.254.169.254/opc/v{version}/"
@@ -61,43 +61,45 @@ def _ensure_netfailover_safe(network_config):
 
     """
     # ignore anything that's not an actual network-config
-    if 'version' not in network_config:
+    if "version" not in network_config:
         return
 
-    if network_config['version'] not in [1, 2]:
-        LOG.debug('Ignoring unknown network config version: %s',
-                  network_config['version'])
+    if network_config["version"] not in [1, 2]:
+        LOG.debug(
+            "Ignoring unknown network config version: %s",
+            network_config["version"],
+        )
         return
 
     mac_to_name = get_interfaces_by_mac()
-    if network_config['version'] == 1:
-        for cfg in [c for c in network_config['config'] if 'type' in c]:
-            if cfg['type'] == 'physical':
-                if 'mac_address' in cfg:
-                    mac = cfg['mac_address']
+    if network_config["version"] == 1:
+        for cfg in [c for c in network_config["config"] if "type" in c]:
+            if cfg["type"] == "physical":
+                if "mac_address" in cfg:
+                    mac = cfg["mac_address"]
                     cur_name = mac_to_name.get(mac)
                     if not cur_name:
                         continue
                     elif is_netfail_master(cur_name):
-                        del cfg['mac_address']
+                        del cfg["mac_address"]
 
-    elif network_config['version'] == 2:
-        for _, cfg in network_config.get('ethernets', {}).items():
-            if 'match' in cfg:
-                macaddr = cfg.get('match', {}).get('macaddress')
+    elif network_config["version"] == 2:
+        for _, cfg in network_config.get("ethernets", {}).items():
+            if "match" in cfg:
+                macaddr = cfg.get("match", {}).get("macaddress")
                 if macaddr:
                     cur_name = mac_to_name.get(macaddr)
                     if not cur_name:
                         continue
                     elif is_netfail_master(cur_name):
-                        del cfg['match']['macaddress']
-                        del cfg['set-name']
-                        cfg['match']['name'] = cur_name
+                        del cfg["match"]["macaddress"]
+                        del cfg["set-name"]
+                        cfg["match"]["name"] = cur_name
 
 
 class DataSourceOracle(sources.DataSource):
 
-    dsname = 'Oracle'
+    dsname = "Oracle"
     system_uuid = None
     vendordata_pure = None
     network_config_sources = (
@@ -113,9 +115,12 @@ class DataSourceOracle(sources.DataSource):
         super(DataSourceOracle, self).__init__(sys_cfg, *args, **kwargs)
         self._vnics_data = None
 
-        self.ds_cfg = util.mergemanydict([
-            util.get_cfg_by_path(sys_cfg, ['datasource', self.dsname], {}),
-            BUILTIN_DS_CONFIG])
+        self.ds_cfg = util.mergemanydict(
+            [
+                util.get_cfg_by_path(sys_cfg, ["datasource", self.dsname], {}),
+                BUILTIN_DS_CONFIG,
+            ]
+        )
 
     def _is_platform_viable(self):
         """Check platform environment to report if this datasource may run."""
@@ -130,8 +135,8 @@ class DataSourceOracle(sources.DataSource):
         # network may be configured if iscsi root.  If that is the case
         # then read_initramfs_config will return non-None.
         fetch_vnics_data = self.ds_cfg.get(
-            'configure_secondary_nics',
-            BUILTIN_DS_CONFIG["configure_secondary_nics"]
+            "configure_secondary_nics",
+            BUILTIN_DS_CONFIG["configure_secondary_nics"],
         )
         network_context = noop()
         if not _is_iscsi_root():
@@ -140,7 +145,7 @@ class DataSourceOracle(sources.DataSource):
                 connectivity_url_data={
                     "url": METADATA_PATTERN.format(version=2, path="instance"),
                     "headers": V2_HEADERS,
-                }
+                },
             )
         with network_context:
             fetched_metadata = read_opc_metadata(
@@ -179,7 +184,7 @@ class DataSourceOracle(sources.DataSource):
         return sources.instance_id_matches_system_uuid(self.system_uuid)
 
     def get_public_ssh_keys(self):
-        return sources.normalize_pubkey_data(self.metadata.get('public_keys'))
+        return sources.normalize_pubkey_data(self.metadata.get("public_keys"))
 
     @property
     def network_config(self):
@@ -196,8 +201,8 @@ class DataSourceOracle(sources.DataSource):
                 self._network_config = self.distro.generate_fallback_config()
 
             if self.ds_cfg.get(
-                'configure_secondary_nics',
-                BUILTIN_DS_CONFIG["configure_secondary_nics"]
+                "configure_secondary_nics",
+                BUILTIN_DS_CONFIG["configure_secondary_nics"],
             ):
                 try:
                     # Mutate self._network_config to include secondary
@@ -205,8 +210,8 @@ class DataSourceOracle(sources.DataSource):
                     self._add_network_config_from_opc_imds()
                 except Exception:
                     util.logexc(
-                        LOG,
-                        "Failed to parse secondary network configuration!")
+                        LOG, "Failed to parse secondary network configuration!"
+                    )
 
             # we need to verify that the nic selected is not a netfail over
             # device and, if it is a netfail master, then we need to avoid
@@ -230,11 +235,10 @@ class DataSourceOracle(sources.DataSource):
             (if the IMDS returns valid JSON with unexpected contents).
         """
         if self._vnics_data is None:
-            LOG.warning(
-                "Secondary NIC data is UNSET but should not be")
+            LOG.warning("Secondary NIC data is UNSET but should not be")
             return
 
-        if 'nicIndex' in self._vnics_data[0]:
+        if "nicIndex" in self._vnics_data[0]:
             # TODO: Once configure_secondary_nics defaults to True, lower the
             # level of this log message.  (Currently, if we're running this
             # code at all, someone has explicitly opted-in to secondary
@@ -243,8 +247,8 @@ class DataSourceOracle(sources.DataSource):
             # Metal Machine launch, which means INFO or DEBUG would be more
             # appropriate.)
             LOG.warning(
-                'VNIC metadata indicates this is a bare metal machine; '
-                'skipping secondary VNIC configuration.'
+                "VNIC metadata indicates this is a bare metal machine; "
+                "skipping secondary VNIC configuration."
             )
             return
 
@@ -254,39 +258,45 @@ class DataSourceOracle(sources.DataSource):
             # We skip the first entry in the response because the primary
             # interface is already configured by iSCSI boot; applying
             # configuration from the IMDS is not required.
-            mac_address = vnic_dict['macAddr'].lower()
+            mac_address = vnic_dict["macAddr"].lower()
             if mac_address not in interfaces_by_mac:
-                LOG.debug('Interface with MAC %s not found; skipping',
-                          mac_address)
+                LOG.debug(
+                    "Interface with MAC %s not found; skipping", mac_address
+                )
                 continue
             name = interfaces_by_mac[mac_address]
 
-            if self._network_config['version'] == 1:
+            if self._network_config["version"] == 1:
                 subnet = {
-                    'type': 'static',
-                    'address': vnic_dict['privateIp'],
+                    "type": "static",
+                    "address": vnic_dict["privateIp"],
+                }
+                self._network_config["config"].append(
+                    {
+                        "name": name,
+                        "type": "physical",
+                        "mac_address": mac_address,
+                        "mtu": MTU,
+                        "subnets": [subnet],
+                    }
+                )
+            elif self._network_config["version"] == 2:
+                self._network_config["ethernets"][name] = {
+                    "addresses": [vnic_dict["privateIp"]],
+                    "mtu": MTU,
+                    "dhcp4": False,
+                    "dhcp6": False,
+                    "match": {"macaddress": mac_address},
                 }
-                self._network_config['config'].append({
-                    'name': name,
-                    'type': 'physical',
-                    'mac_address': mac_address,
-                    'mtu': MTU,
-                    'subnets': [subnet],
-                })
-            elif self._network_config['version'] == 2:
-                self._network_config['ethernets'][name] = {
-                    'addresses': [vnic_dict['privateIp']],
-                    'mtu': MTU, 'dhcp4': False, 'dhcp6': False,
-                    'match': {'macaddress': mac_address}}
 
 
 def _read_system_uuid():
-    sys_uuid = dmi.read_dmi_data('system-uuid')
+    sys_uuid = dmi.read_dmi_data("system-uuid")
     return None if sys_uuid is None else sys_uuid.lower()
 
 
 def _is_platform_viable():
-    asset_tag = dmi.read_dmi_data('chassis-asset-tag')
+    asset_tag = dmi.read_dmi_data("chassis-asset-tag")
     return asset_tag == CHASSIS_ASSET_TAG
 
 
@@ -329,8 +339,9 @@ def read_opc_metadata(*, fetch_vnics_data: bool = False):
         try:
             vnics_data = _fetch(metadata_version, path="vnics")
         except UrlError:
-            util.logexc(LOG,
-                        "Failed to fetch secondary network configuration!")
+            util.logexc(
+                LOG, "Failed to fetch secondary network configuration!"
+            )
     return OpcMetadata(metadata_version, instance_data, vnics_data)
 
 
diff --git a/cloudinit/sources/DataSourceRbxCloud.py b/cloudinit/sources/DataSourceRbxCloud.py
index bb69e998..14ac77e4 100644
--- a/cloudinit/sources/DataSourceRbxCloud.py
+++ b/cloudinit/sources/DataSourceRbxCloud.py
@@ -14,32 +14,34 @@ import os
 import os.path
 
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import sources, subp, util
 from cloudinit.event import EventScope, EventType
 
 LOG = logging.getLogger(__name__)
-ETC_HOSTS = '/etc/hosts'
+ETC_HOSTS = "/etc/hosts"
 
 
 def get_manage_etc_hosts():
     hosts = util.load_file(ETC_HOSTS, quiet=True)
     if hosts:
-        LOG.debug('/etc/hosts exists - setting manage_etc_hosts to False')
+        LOG.debug("/etc/hosts exists - setting manage_etc_hosts to False")
         return False
-    LOG.debug('/etc/hosts does not exists - setting manage_etc_hosts to True')
+    LOG.debug("/etc/hosts does not exists - setting manage_etc_hosts to True")
     return True
 
 
 def ip2int(addr):
-    parts = addr.split('.')
-    return (int(parts[0]) << 24) + (int(parts[1]) << 16) + \
-           (int(parts[2]) << 8) + int(parts[3])
+    parts = addr.split(".")
+    return (
+        (int(parts[0]) << 24)
+        + (int(parts[1]) << 16)
+        + (int(parts[2]) << 8)
+        + int(parts[3])
+    )
 
 
 def int2ip(addr):
-    return '.'.join([str(addr >> (i << 3) & 0xFF) for i in range(4)[::-1]])
+    return ".".join([str(addr >> (i << 3) & 0xFF) for i in range(4)[::-1]])
 
 
 def _sub_arp(cmd):
@@ -48,33 +50,35 @@ def _sub_arp(cmd):
     and runs arping.  Breaking this to a separate function
     for later use in mocking and unittests
     """
-    return subp.subp(['arping'] + cmd)
+    return subp.subp(["arping"] + cmd)
 
 
 def gratuitous_arp(items, distro):
-    source_param = '-S'
-    if distro.name in ['fedora', 'centos', 'rhel']:
-        source_param = '-s'
+    source_param = "-S"
+    if distro.name in ["fedora", "centos", "rhel"]:
+        source_param = "-s"
     for item in items:
         try:
-            _sub_arp([
-                '-c', '2',
-                source_param, item['source'],
-                item['destination']
-            ])
+            _sub_arp(
+                ["-c", "2", source_param, item["source"], item["destination"]]
+            )
         except subp.ProcessExecutionError as error:
             # warning, because the system is able to function properly
             # despite no success - some ARP table may be waiting for
             # expiration, but the system may continue
-            LOG.warning('Failed to arping from "%s" to "%s": %s',
-                        item['source'], item['destination'], error)
+            LOG.warning(
+                'Failed to arping from "%s" to "%s": %s',
+                item["source"],
+                item["destination"],
+                error,
+            )
 
 
 def get_md():
     """Returns False (not found or error) or a dictionary with metadata."""
     devices = set(
-        util.find_devs_with('LABEL=CLOUDMD') +
-        util.find_devs_with('LABEL=cloudmd')
+        util.find_devs_with("LABEL=CLOUDMD")
+        + util.find_devs_with("LABEL=cloudmd")
     )
     if not devices:
         return False
@@ -83,7 +87,7 @@ def get_md():
             rbx_data = util.mount_cb(
                 device=device,
                 callback=read_user_data_callback,
-                mtype=['vfat', 'fat', 'msdosfs']
+                mtype=["vfat", "fat", "msdosfs"],
             )
             if rbx_data:
                 return rbx_data
@@ -91,11 +95,13 @@ def get_md():
             if err.errno != errno.ENOENT:
                 raise
         except util.MountFailedError:
-            util.logexc(LOG, "Failed to mount %s when looking for user "
-                             "data", device)
+            util.logexc(
+                LOG, "Failed to mount %s when looking for user data", device
+            )
 
-    LOG.debug("Did not find RbxCloud data, searched devices: %s",
-              ",".join(devices))
+    LOG.debug(
+        "Did not find RbxCloud data, searched devices: %s", ",".join(devices)
+    )
     return False
 
 
@@ -107,25 +113,28 @@ def generate_network_config(netadps):
     @returns: A dict containing network config
     """
     return {
-        'version': 1,
-        'config': [
+        "version": 1,
+        "config": [
             {
-                'type': 'physical',
-                'name': 'eth{}'.format(str(i)),
-                'mac_address': netadp['macaddress'].lower(),
-                'subnets': [
+                "type": "physical",
+                "name": "eth{}".format(str(i)),
+                "mac_address": netadp["macaddress"].lower(),
+                "subnets": [
                     {
-                        'type': 'static',
-                        'address': ip['address'],
-                        'netmask': netadp['network']['netmask'],
-                        'control': 'auto',
-                        'gateway': netadp['network']['gateway'],
-                        'dns_nameservers': netadp['network']['dns'][
-                            'nameservers']
-                    } for ip in netadp['ip']
+                        "type": "static",
+                        "address": ip["address"],
+                        "netmask": netadp["network"]["netmask"],
+                        "control": "auto",
+                        "gateway": netadp["network"]["gateway"],
+                        "dns_nameservers": netadp["network"]["dns"][
+                            "nameservers"
+                        ],
+                    }
+                    for ip in netadp["ip"]
                 ],
-            } for i, netadp in enumerate(netadps)
-        ]
+            }
+            for i, netadp in enumerate(netadps)
+        ],
     }
 
 
@@ -140,65 +149,60 @@ def read_user_data_callback(mount_dir):
     """
     meta_data = util.load_json(
         text=util.load_file(
-            fname=os.path.join(mount_dir, 'cloud.json'),
-            decode=False
+            fname=os.path.join(mount_dir, "cloud.json"), decode=False
         )
     )
     user_data = util.load_file(
-        fname=os.path.join(mount_dir, 'user.data'),
-        quiet=True
+        fname=os.path.join(mount_dir, "user.data"), quiet=True
     )
-    if 'vm' not in meta_data or 'netadp' not in meta_data:
+    if "vm" not in meta_data or "netadp" not in meta_data:
         util.logexc(LOG, "Failed to load metadata. Invalid format.")
         return None
-    username = meta_data.get('additionalMetadata', {}).get('username')
-    ssh_keys = meta_data.get('additionalMetadata', {}).get('sshKeys', [])
+    username = meta_data.get("additionalMetadata", {}).get("username")
+    ssh_keys = meta_data.get("additionalMetadata", {}).get("sshKeys", [])
 
     hash = None
-    if meta_data.get('additionalMetadata', {}).get('password'):
-        hash = meta_data['additionalMetadata']['password']['sha512']
+    if meta_data.get("additionalMetadata", {}).get("password"):
+        hash = meta_data["additionalMetadata"]["password"]["sha512"]
 
-    network = generate_network_config(meta_data['netadp'])
+    network = generate_network_config(meta_data["netadp"])
 
     data = {
-        'userdata': user_data,
-        'metadata': {
-            'instance-id': meta_data['vm']['_id'],
-            'local-hostname': meta_data['vm']['name'],
-            'public-keys': []
+        "userdata": user_data,
+        "metadata": {
+            "instance-id": meta_data["vm"]["_id"],
+            "local-hostname": meta_data["vm"]["name"],
+            "public-keys": [],
         },
-        'gratuitous_arp': [
-            {
-                "source": ip["address"],
-                "destination": target
-            }
-            for netadp in meta_data['netadp']
-            for ip in netadp['ip']
+        "gratuitous_arp": [
+            {"source": ip["address"], "destination": target}
+            for netadp in meta_data["netadp"]
+            for ip in netadp["ip"]
             for target in [
-                netadp['network']["gateway"],
-                int2ip(ip2int(netadp['network']["gateway"]) + 2),
-                int2ip(ip2int(netadp['network']["gateway"]) + 3)
+                netadp["network"]["gateway"],
+                int2ip(ip2int(netadp["network"]["gateway"]) + 2),
+                int2ip(ip2int(netadp["network"]["gateway"]) + 3),
             ]
         ],
-        'cfg': {
-            'ssh_pwauth': True,
-            'disable_root': True,
-            'system_info': {
-                'default_user': {
-                    'name': username,
-                    'gecos': username,
-                    'sudo': ['ALL=(ALL) NOPASSWD:ALL'],
-                    'passwd': hash,
-                    'lock_passwd': False,
-                    'ssh_authorized_keys': ssh_keys,
+        "cfg": {
+            "ssh_pwauth": True,
+            "disable_root": True,
+            "system_info": {
+                "default_user": {
+                    "name": username,
+                    "gecos": username,
+                    "sudo": ["ALL=(ALL) NOPASSWD:ALL"],
+                    "passwd": hash,
+                    "lock_passwd": False,
+                    "ssh_authorized_keys": ssh_keys,
                 }
             },
-            'network_config': network,
-            'manage_etc_hosts': get_manage_etc_hosts(),
+            "network_config": network,
+            "manage_etc_hosts": get_manage_etc_hosts(),
         },
     }
 
-    LOG.debug('returning DATA object:')
+    LOG.debug("returning DATA object:")
     LOG.debug(data)
 
     return data
@@ -206,11 +210,13 @@ def read_user_data_callback(mount_dir):
 
 class DataSourceRbxCloud(sources.DataSource):
     dsname = "RbxCloud"
-    default_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-        EventType.BOOT,
-        EventType.BOOT_LEGACY
-    }}
+    default_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+            EventType.BOOT,
+            EventType.BOOT_LEGACY,
+        }
+    }
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
@@ -228,18 +234,18 @@ class DataSourceRbxCloud(sources.DataSource):
         rbx_data = get_md()
         if rbx_data is False:
             return False
-        self.userdata_raw = rbx_data['userdata']
-        self.metadata = rbx_data['metadata']
-        self.gratuitous_arp = rbx_data['gratuitous_arp']
-        self.cfg = rbx_data['cfg']
+        self.userdata_raw = rbx_data["userdata"]
+        self.metadata = rbx_data["metadata"]
+        self.gratuitous_arp = rbx_data["gratuitous_arp"]
+        self.cfg = rbx_data["cfg"]
         return True
 
     @property
     def network_config(self):
-        return self.cfg['network_config']
+        return self.cfg["network_config"]
 
     def get_public_ssh_keys(self):
-        return self.metadata['public-keys']
+        return self.metadata["public-keys"]
 
     def get_userdata_raw(self):
         return self.userdata_raw
diff --git a/cloudinit/sources/DataSourceScaleway.py b/cloudinit/sources/DataSourceScaleway.py
index 7b8974a2..8e5dd82c 100644
--- a/cloudinit/sources/DataSourceScaleway.py
+++ b/cloudinit/sources/DataSourceScaleway.py
@@ -27,21 +27,18 @@ from requests.packages.urllib3.poolmanager import PoolManager
 
 from cloudinit import dmi
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import url_helper
-from cloudinit import util
-from cloudinit import net
+from cloudinit import net, sources, url_helper, util
 from cloudinit.event import EventScope, EventType
 from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError
 
 LOG = logging.getLogger(__name__)
 
-DS_BASE_URL = 'http://169.254.42.42'
+DS_BASE_URL = "http://169.254.42.42"
 
 BUILTIN_DS_CONFIG = {
-    'metadata_url': DS_BASE_URL + '/conf?format=json',
-    'userdata_url': DS_BASE_URL + '/user_data/cloud-init',
-    'vendordata_url': DS_BASE_URL + '/vendor_data/cloud-init'
+    "metadata_url": DS_BASE_URL + "/conf?format=json",
+    "userdata_url": DS_BASE_URL + "/user_data/cloud-init",
+    "vendordata_url": DS_BASE_URL + "/vendor_data/cloud-init",
 }
 
 DEF_MD_RETRIES = 5
@@ -57,15 +54,15 @@ def on_scaleway():
     * the initrd created the file /var/run/scaleway.
     * "scaleway" is in the kernel cmdline.
     """
-    vendor_name = dmi.read_dmi_data('system-manufacturer')
-    if vendor_name == 'Scaleway':
+    vendor_name = dmi.read_dmi_data("system-manufacturer")
+    if vendor_name == "Scaleway":
         return True
 
-    if os.path.exists('/var/run/scaleway'):
+    if os.path.exists("/var/run/scaleway"):
         return True
 
     cmdline = util.get_cmdline()
-    if 'scaleway' in cmdline:
+    if "scaleway" in cmdline:
         return True
 
     return False
@@ -75,6 +72,7 @@ class SourceAddressAdapter(requests.adapters.HTTPAdapter):
     """
     Adapter for requests to choose the local address to bind to.
     """
+
     def __init__(self, source_address, **kwargs):
         self.source_address = source_address
         super(SourceAddressAdapter, self).__init__(**kwargs)
@@ -83,11 +81,13 @@ class SourceAddressAdapter(requests.adapters.HTTPAdapter):
         socket_options = HTTPConnection.default_socket_options + [
             (socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
         ]
-        self.poolmanager = PoolManager(num_pools=connections,
-                                       maxsize=maxsize,
-                                       block=block,
-                                       source_address=self.source_address,
-                                       socket_options=socket_options)
+        self.poolmanager = PoolManager(
+            num_pools=connections,
+            maxsize=maxsize,
+            block=block,
+            source_address=self.source_address,
+            socket_options=socket_options,
+        )
 
 
 def query_data_api_once(api_address, timeout, requests_session):
@@ -117,9 +117,10 @@ def query_data_api_once(api_address, timeout, requests_session):
             session=requests_session,
             # If the error is a HTTP/404 or a ConnectionError, go into raise
             # block below and don't bother retrying.
-            exception_cb=lambda _, exc: exc.code != 404 and (
+            exception_cb=lambda _, exc: exc.code != 404
+            and (
                 not isinstance(exc.cause, requests.exceptions.ConnectionError)
-            )
+            ),
         )
         return util.decode_binary(resp.contents)
     except url_helper.UrlError as exc:
@@ -143,25 +144,22 @@ def query_data_api(api_type, api_address, retries, timeout):
     for port in range(1, max(retries, 2)):
         try:
             LOG.debug(
-                'Trying to get %s data (bind on port %d)...',
-                api_type, port
+                "Trying to get %s data (bind on port %d)...", api_type, port
             )
             requests_session = requests.Session()
             requests_session.mount(
-                'http://',
-                SourceAddressAdapter(source_address=('0.0.0.0', port))
+                "http://",
+                SourceAddressAdapter(source_address=("0.0.0.0", port)),
             )
             data = query_data_api_once(
-                api_address,
-                timeout=timeout,
-                requests_session=requests_session
+                api_address, timeout=timeout, requests_session=requests_session
             )
-            LOG.debug('%s-data downloaded', api_type)
+            LOG.debug("%s-data downloaded", api_type)
             return data
 
         except url_helper.UrlError as exc:
             # Local port already in use or HTTP/429.
-            LOG.warning('Error while trying to get %s data: %s', api_type, exc)
+            LOG.warning("Error while trying to get %s data: %s", api_type, exc)
             time.sleep(5)
             last_exc = exc
             continue
@@ -176,40 +174,40 @@ class DataSourceScaleway(sources.DataSource):
         EventScope.NETWORK: {
             EventType.BOOT_NEW_INSTANCE,
             EventType.BOOT,
-            EventType.BOOT_LEGACY
+            EventType.BOOT_LEGACY,
         }
     }
 
     def __init__(self, sys_cfg, distro, paths):
         super(DataSourceScaleway, self).__init__(sys_cfg, distro, paths)
 
-        self.ds_cfg = util.mergemanydict([
-            util.get_cfg_by_path(sys_cfg, ["datasource", "Scaleway"], {}),
-            BUILTIN_DS_CONFIG
-        ])
+        self.ds_cfg = util.mergemanydict(
+            [
+                util.get_cfg_by_path(sys_cfg, ["datasource", "Scaleway"], {}),
+                BUILTIN_DS_CONFIG,
+            ]
+        )
 
-        self.metadata_address = self.ds_cfg['metadata_url']
-        self.userdata_address = self.ds_cfg['userdata_url']
-        self.vendordata_address = self.ds_cfg['vendordata_url']
+        self.metadata_address = self.ds_cfg["metadata_url"]
+        self.userdata_address = self.ds_cfg["userdata_url"]
+        self.vendordata_address = self.ds_cfg["vendordata_url"]
 
-        self.retries = int(self.ds_cfg.get('retries', DEF_MD_RETRIES))
-        self.timeout = int(self.ds_cfg.get('timeout', DEF_MD_TIMEOUT))
+        self.retries = int(self.ds_cfg.get("retries", DEF_MD_RETRIES))
+        self.timeout = int(self.ds_cfg.get("timeout", DEF_MD_TIMEOUT))
         self._fallback_interface = None
         self._network_config = sources.UNSET
 
     def _crawl_metadata(self):
-        resp = url_helper.readurl(self.metadata_address,
-                                  timeout=self.timeout,
-                                  retries=self.retries)
+        resp = url_helper.readurl(
+            self.metadata_address, timeout=self.timeout, retries=self.retries
+        )
         self.metadata = json.loads(util.decode_binary(resp.contents))
 
         self.userdata_raw = query_data_api(
-            'user-data', self.userdata_address,
-            self.retries, self.timeout
+            "user-data", self.userdata_address, self.retries, self.timeout
         )
         self.vendordata_raw = query_data_api(
-            'vendor-data', self.vendordata_address,
-            self.retries, self.timeout
+            "vendor-data", self.vendordata_address, self.retries, self.timeout
         )
 
     def _get_data(self):
@@ -221,8 +219,10 @@ class DataSourceScaleway(sources.DataSource):
         try:
             with EphemeralDHCPv4(self._fallback_interface):
                 util.log_time(
-                    logfunc=LOG.debug, msg='Crawl of metadata service',
-                    func=self._crawl_metadata)
+                    logfunc=LOG.debug,
+                    msg="Crawl of metadata service",
+                    func=self._crawl_metadata,
+                )
         except (NoDHCPLeaseError) as e:
             util.logexc(LOG, str(e))
             return False
@@ -235,8 +235,10 @@ class DataSourceScaleway(sources.DataSource):
         metadata API.
         """
         if self._network_config is None:
-            LOG.warning('Found None as cached _network_config. '
-                        'Resetting to %s', sources.UNSET)
+            LOG.warning(
+                "Found None as cached _network_config. Resetting to %s",
+                sources.UNSET,
+            )
             self._network_config = sources.UNSET
 
         if self._network_config != sources.UNSET:
@@ -245,16 +247,19 @@ class DataSourceScaleway(sources.DataSource):
         if self._fallback_interface is None:
             self._fallback_interface = net.find_fallback_nic()
 
-        netcfg = {'type': 'physical', 'name': '%s' % self._fallback_interface}
-        subnets = [{'type': 'dhcp4'}]
-        if self.metadata['ipv6']:
-            subnets += [{'type': 'static',
-                         'address': '%s' % self.metadata['ipv6']['address'],
-                         'gateway': '%s' % self.metadata['ipv6']['gateway'],
-                         'netmask': '%s' % self.metadata['ipv6']['netmask'],
-                         }]
-        netcfg['subnets'] = subnets
-        self._network_config = {'version': 1, 'config': [netcfg]}
+        netcfg = {"type": "physical", "name": "%s" % self._fallback_interface}
+        subnets = [{"type": "dhcp4"}]
+        if self.metadata["ipv6"]:
+            subnets += [
+                {
+                    "type": "static",
+                    "address": "%s" % self.metadata["ipv6"]["address"],
+                    "gateway": "%s" % self.metadata["ipv6"]["gateway"],
+                    "netmask": "%s" % self.metadata["ipv6"]["netmask"],
+                }
+            ]
+        netcfg["subnets"] = subnets
+        self._network_config = {"version": 1, "config": [netcfg]}
         return self._network_config
 
     @property
@@ -262,14 +267,14 @@ class DataSourceScaleway(sources.DataSource):
         return None
 
     def get_instance_id(self):
-        return self.metadata['id']
+        return self.metadata["id"]
 
     def get_public_ssh_keys(self):
-        ssh_keys = [key['key'] for key in self.metadata['ssh_public_keys']]
+        ssh_keys = [key["key"] for key in self.metadata["ssh_public_keys"]]
 
         akeypre = "AUTHORIZED_KEY="
         plen = len(akeypre)
-        for tag in self.metadata.get('tags', []):
+        for tag in self.metadata.get("tags", []):
             if not tag.startswith(akeypre):
                 continue
             ssh_keys.append(tag[:plen].replace("_", " "))
@@ -277,7 +282,7 @@ class DataSourceScaleway(sources.DataSource):
         return ssh_keys
 
     def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
-        return self.metadata['hostname']
+        return self.metadata["hostname"]
 
     @property
     def availability_zone(self):
diff --git a/cloudinit/sources/DataSourceSmartOS.py b/cloudinit/sources/DataSourceSmartOS.py
index 9b16bf8d..40f915fa 100644
--- a/cloudinit/sources/DataSourceSmartOS.py
+++ b/cloudinit/sources/DataSourceSmartOS.py
@@ -32,55 +32,51 @@ import socket
 
 from cloudinit import dmi
 from cloudinit import log as logging
-from cloudinit import serial
-from cloudinit import sources
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import serial, sources, subp, util
 from cloudinit.event import EventScope, EventType
 
 LOG = logging.getLogger(__name__)
 
 SMARTOS_ATTRIB_MAP = {
     # Cloud-init Key : (SmartOS Key, Strip line endings)
-    'instance-id': ('sdc:uuid', True),
-    'local-hostname': ('hostname', True),
-    'public-keys': ('root_authorized_keys', True),
-    'user-script': ('user-script', False),
-    'legacy-user-data': ('user-data', False),
-    'user-data': ('cloud-init:user-data', False),
-    'iptables_disable': ('iptables_disable', True),
-    'motd_sys_info': ('motd_sys_info', True),
-    'availability_zone': ('sdc:datacenter_name', True),
-    'vendor-data': ('sdc:vendor-data', False),
-    'operator-script': ('sdc:operator-script', False),
-    'hostname': ('sdc:hostname', True),
-    'dns_domain': ('sdc:dns_domain', True),
+    "instance-id": ("sdc:uuid", True),
+    "local-hostname": ("hostname", True),
+    "public-keys": ("root_authorized_keys", True),
+    "user-script": ("user-script", False),
+    "legacy-user-data": ("user-data", False),
+    "user-data": ("cloud-init:user-data", False),
+    "iptables_disable": ("iptables_disable", True),
+    "motd_sys_info": ("motd_sys_info", True),
+    "availability_zone": ("sdc:datacenter_name", True),
+    "vendor-data": ("sdc:vendor-data", False),
+    "operator-script": ("sdc:operator-script", False),
+    "hostname": ("sdc:hostname", True),
+    "dns_domain": ("sdc:dns_domain", True),
 }
 
 SMARTOS_ATTRIB_JSON = {
     # Cloud-init Key : (SmartOS Key known JSON)
-    'network-data': 'sdc:nics',
-    'dns_servers': 'sdc:resolvers',
-    'routes': 'sdc:routes',
+    "network-data": "sdc:nics",
+    "dns_servers": "sdc:resolvers",
+    "routes": "sdc:routes",
 }
 
 SMARTOS_ENV_LX_BRAND = "lx-brand"
 SMARTOS_ENV_KVM = "kvm"
 
-DS_NAME = 'SmartOS'
-DS_CFG_PATH = ['datasource', DS_NAME]
+DS_NAME = "SmartOS"
+DS_CFG_PATH = ["datasource", DS_NAME]
 NO_BASE64_DECODE = [
-    'iptables_disable',
-    'motd_sys_info',
-    'root_authorized_keys',
-    'sdc:datacenter_name',
-    'sdc:uuid'
-    'user-data',
-    'user-script',
+    "iptables_disable",
+    "motd_sys_info",
+    "root_authorized_keys",
+    "sdc:datacenter_name",
+    "sdc:uuiduser-data",
+    "user-script",
 ]
 
-METADATA_SOCKFILE = '/native/.zonecontrol/metadata.sock'
-SERIAL_DEVICE = '/dev/ttyS1'
+METADATA_SOCKFILE = "/native/.zonecontrol/metadata.sock"
+SERIAL_DEVICE = "/dev/ttyS1"
 SERIAL_TIMEOUT = 60
 
 # BUILT-IN DATASOURCE CONFIGURATION
@@ -98,24 +94,26 @@ SERIAL_TIMEOUT = 60
 #    fs_setup: describes how to format the ephemeral drive
 #
 BUILTIN_DS_CONFIG = {
-    'serial_device': SERIAL_DEVICE,
-    'serial_timeout': SERIAL_TIMEOUT,
-    'metadata_sockfile': METADATA_SOCKFILE,
-    'no_base64_decode': NO_BASE64_DECODE,
-    'base64_keys': [],
-    'base64_all': False,
-    'disk_aliases': {'ephemeral0': '/dev/vdb'},
+    "serial_device": SERIAL_DEVICE,
+    "serial_timeout": SERIAL_TIMEOUT,
+    "metadata_sockfile": METADATA_SOCKFILE,
+    "no_base64_decode": NO_BASE64_DECODE,
+    "base64_keys": [],
+    "base64_all": False,
+    "disk_aliases": {"ephemeral0": "/dev/vdb"},
 }
 
 BUILTIN_CLOUD_CONFIG = {
-    'disk_setup': {
-        'ephemeral0': {'table_type': 'mbr',
-                       'layout': False,
-                       'overwrite': False}
+    "disk_setup": {
+        "ephemeral0": {
+            "table_type": "mbr",
+            "layout": False,
+            "overwrite": False,
+        }
     },
-    'fs_setup': [{'label': 'ephemeral0',
-                  'filesystem': 'ext4',
-                  'device': 'ephemeral0'}],
+    "fs_setup": [
+        {"label": "ephemeral0", "filesystem": "ext4", "device": "ephemeral0"}
+    ],
 }
 
 # builtin vendor-data is a boothook that writes a script into
@@ -170,18 +168,23 @@ class DataSourceSmartOS(sources.DataSource):
 
     smartos_type = sources.UNSET
     md_client = sources.UNSET
-    default_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-        EventType.BOOT,
-        EventType.BOOT_LEGACY
-    }}
+    default_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+            EventType.BOOT,
+            EventType.BOOT_LEGACY,
+        }
+    }
 
     def __init__(self, sys_cfg, distro, paths):
         sources.DataSource.__init__(self, sys_cfg, distro, paths)
-        self.ds_cfg = util.mergemanydict([
-            self.ds_cfg,
-            util.get_cfg_by_path(sys_cfg, DS_CFG_PATH, {}),
-            BUILTIN_DS_CONFIG])
+        self.ds_cfg = util.mergemanydict(
+            [
+                self.ds_cfg,
+                util.get_cfg_by_path(sys_cfg, DS_CFG_PATH, {}),
+                BUILTIN_DS_CONFIG,
+            ]
+        )
 
         self.metadata = {}
         self.network_data = None
@@ -204,25 +207,28 @@ class DataSourceSmartOS(sources.DataSource):
         if self.md_client == sources.UNSET:
             self.md_client = jmc_client_factory(
                 smartos_type=self.smartos_type,
-                metadata_sockfile=self.ds_cfg['metadata_sockfile'],
-                serial_device=self.ds_cfg['serial_device'],
-                serial_timeout=self.ds_cfg['serial_timeout'])
+                metadata_sockfile=self.ds_cfg["metadata_sockfile"],
+                serial_device=self.ds_cfg["serial_device"],
+                serial_timeout=self.ds_cfg["serial_timeout"],
+            )
 
     def _set_provisioned(self):
-        '''Mark the instance provisioning state as successful.
+        """Mark the instance provisioning state as successful.
 
         When run in a zone, the host OS will look for /var/svc/provisioning
         to be renamed as /var/svc/provision_success.   This should be done
         after meta-data is successfully retrieved and from this point
         the host considers the provision of the zone to be a success and
         keeps the zone running.
-        '''
+        """
 
-        LOG.debug('Instance provisioning state set as successful')
-        svc_path = '/var/svc'
-        if os.path.exists('/'.join([svc_path, 'provisioning'])):
-            os.rename('/'.join([svc_path, 'provisioning']),
-                      '/'.join([svc_path, 'provision_success']))
+        LOG.debug("Instance provisioning state set as successful")
+        svc_path = "/var/svc"
+        if os.path.exists("/".join([svc_path, "provisioning"])):
+            os.rename(
+                "/".join([svc_path, "provisioning"]),
+                "/".join([svc_path, "provision_success"]),
+            )
 
     def _get_data(self):
         self._init()
@@ -235,8 +241,10 @@ class DataSourceSmartOS(sources.DataSource):
             return False
 
         if not self.md_client.exists():
-            LOG.debug("No metadata device '%r' found for SmartOS datasource",
-                      self.md_client)
+            LOG.debug(
+                "No metadata device '%r' found for SmartOS datasource",
+                self.md_client,
+            )
             return False
 
         # Open once for many requests, rather than once for each request
@@ -259,24 +267,33 @@ class DataSourceSmartOS(sources.DataSource):
         # We write 'user-script' and 'operator-script' into the
         # instance/data directory. The default vendor-data then handles
         # executing them later.
-        data_d = os.path.join(self.paths.get_cpath(), 'instances',
-                              md['instance-id'], 'data')
-        user_script = os.path.join(data_d, 'user-script')
+        data_d = os.path.join(
+            self.paths.get_cpath(), "instances", md["instance-id"], "data"
+        )
+        user_script = os.path.join(data_d, "user-script")
         u_script_l = "%s/user-script" % LEGACY_USER_D
-        write_boot_content(md.get('user-script'), content_f=user_script,
-                           link=u_script_l, shebang=True, mode=0o700)
-
-        operator_script = os.path.join(data_d, 'operator-script')
-        write_boot_content(md.get('operator-script'),
-                           content_f=operator_script, shebang=False,
-                           mode=0o700)
+        write_boot_content(
+            md.get("user-script"),
+            content_f=user_script,
+            link=u_script_l,
+            shebang=True,
+            mode=0o700,
+        )
+
+        operator_script = os.path.join(data_d, "operator-script")
+        write_boot_content(
+            md.get("operator-script"),
+            content_f=operator_script,
+            shebang=False,
+            mode=0o700,
+        )
 
         # @datadictionary:  This key has no defined format, but its value
         # is written to the file /var/db/mdata-user-data on each boot prior
         # to the phase that runs user-script. This file is not to be executed.
         # This allows a configuration file of some kind to be injected into
         # the machine to be consumed by the user-script when it runs.
-        u_data = md.get('legacy-user-data')
+        u_data = md.get("legacy-user-data")
         u_data_f = "%s/mdata-user-data" % LEGACY_USER_D
         write_boot_content(u_data, u_data_f)
 
@@ -284,38 +301,39 @@ class DataSourceSmartOS(sources.DataSource):
 
         # The hostname may or may not be qualified with the local domain name.
         # This follows section 3.14 of RFC 2132.
-        if not md['local-hostname']:
-            if md['hostname']:
-                md['local-hostname'] = md['hostname']
+        if not md["local-hostname"]:
+            if md["hostname"]:
+                md["local-hostname"] = md["hostname"]
             else:
-                md['local-hostname'] = md['instance-id']
+                md["local-hostname"] = md["instance-id"]
 
         ud = None
-        if md['user-data']:
-            ud = md['user-data']
-
-        if not md['vendor-data']:
-            md['vendor-data'] = BUILTIN_VENDOR_DATA % {
-                'user_script': user_script,
-                'operator_script': operator_script,
-                'per_boot_d': os.path.join(self.paths.get_cpath("scripts"),
-                                           'per-boot'),
+        if md["user-data"]:
+            ud = md["user-data"]
+
+        if not md["vendor-data"]:
+            md["vendor-data"] = BUILTIN_VENDOR_DATA % {
+                "user_script": user_script,
+                "operator_script": operator_script,
+                "per_boot_d": os.path.join(
+                    self.paths.get_cpath("scripts"), "per-boot"
+                ),
             }
 
         self.metadata = util.mergemanydict([md, self.metadata])
         self.userdata_raw = ud
-        self.vendordata_raw = md['vendor-data']
-        self.network_data = md['network-data']
-        self.routes_data = md['routes']
+        self.vendordata_raw = md["vendor-data"]
+        self.network_data = md["network-data"]
+        self.routes_data = md["routes"]
 
         self._set_provisioned()
         return True
 
     def _get_subplatform(self):
-        return 'serial (%s)' % SERIAL_DEVICE
+        return "serial (%s)" % SERIAL_DEVICE
 
     def device_name_to_device(self, name):
-        return self.ds_cfg['disk_aliases'].get(name)
+        return self.ds_cfg["disk_aliases"].get(name)
 
     def get_config_obj(self):
         if self.smartos_type == SMARTOS_ENV_KVM:
@@ -323,7 +341,7 @@ class DataSourceSmartOS(sources.DataSource):
         return {}
 
     def get_instance_id(self):
-        return self.metadata['instance-id']
+        return self.metadata["instance-id"]
 
     @property
     def network_config(self):
@@ -333,12 +351,12 @@ class DataSourceSmartOS(sources.DataSource):
 
         if self._network_config is None:
             if self.network_data is not None:
-                self._network_config = (
-                    convert_smartos_network_data(
-                        network_data=self.network_data,
-                        dns_servers=self.metadata['dns_servers'],
-                        dns_domain=self.metadata['dns_domain'],
-                        routes=self.routes_data))
+                self._network_config = convert_smartos_network_data(
+                    network_data=self.network_data,
+                    dns_servers=self.metadata["dns_servers"],
+                    dns_domain=self.metadata["dns_domain"],
+                    routes=self.routes_data,
+                )
         return self._network_config
 
 
@@ -357,10 +375,12 @@ class JoyentMetadataClient(object):
     The full specification can be found at
     http://eng.joyent.com/mdata/protocol.html
     """
+
     line_regex = re.compile(
-        r'V2 (?P<length>\d+) (?P<checksum>[0-9a-f]+)'
-        r' (?P<body>(?P<request_id>[0-9a-f]+) (?P<status>SUCCESS|NOTFOUND)'
-        r'( (?P<payload>.+))?)')
+        r"V2 (?P<length>\d+) (?P<checksum>[0-9a-f]+)"
+        r" (?P<body>(?P<request_id>[0-9a-f]+) (?P<status>SUCCESS|NOTFOUND)"
+        r"( (?P<payload>.+))?)"
+    )
 
     def __init__(self, smartos_type=None, fp=None):
         if smartos_type is None:
@@ -369,43 +389,50 @@ class JoyentMetadataClient(object):
         self.fp = fp
 
     def _checksum(self, body):
-        return '{0:08x}'.format(
-            binascii.crc32(body.encode('utf-8')) & 0xffffffff)
+        return "{0:08x}".format(
+            binascii.crc32(body.encode("utf-8")) & 0xFFFFFFFF
+        )
 
     def _get_value_from_frame(self, expected_request_id, frame):
         frame_data = self.line_regex.match(frame).groupdict()
-        if int(frame_data['length']) != len(frame_data['body']):
+        if int(frame_data["length"]) != len(frame_data["body"]):
             raise JoyentMetadataFetchException(
-                'Incorrect frame length given ({0} != {1}).'.format(
-                    frame_data['length'], len(frame_data['body'])))
-        expected_checksum = self._checksum(frame_data['body'])
-        if frame_data['checksum'] != expected_checksum:
+                "Incorrect frame length given ({0} != {1}).".format(
+                    frame_data["length"], len(frame_data["body"])
+                )
+            )
+        expected_checksum = self._checksum(frame_data["body"])
+        if frame_data["checksum"] != expected_checksum:
             raise JoyentMetadataFetchException(
-                'Invalid checksum (expected: {0}; got {1}).'.format(
-                    expected_checksum, frame_data['checksum']))
-        if frame_data['request_id'] != expected_request_id:
+                "Invalid checksum (expected: {0}; got {1}).".format(
+                    expected_checksum, frame_data["checksum"]
+                )
+            )
+        if frame_data["request_id"] != expected_request_id:
             raise JoyentMetadataFetchException(
-                'Request ID mismatch (expected: {0}; got {1}).'.format(
-                    expected_request_id, frame_data['request_id']))
-        if not frame_data.get('payload', None):
-            LOG.debug('No value found.')
+                "Request ID mismatch (expected: {0}; got {1}).".format(
+                    expected_request_id, frame_data["request_id"]
+                )
+            )
+        if not frame_data.get("payload", None):
+            LOG.debug("No value found.")
             return None
-        value = util.b64d(frame_data['payload'])
+        value = util.b64d(frame_data["payload"])
         LOG.debug('Value "%s" found.', value)
         return value
 
     def _readline(self):
         """
-           Reads a line a byte at a time until \n is encountered.  Returns an
-           ascii string with the trailing newline removed.
+        Reads a line a byte at a time until \n is encountered.  Returns an
+        ascii string with the trailing newline removed.
 
-           If a timeout (per-byte) is set and it expires, a
-           JoyentMetadataFetchException will be thrown.
+        If a timeout (per-byte) is set and it expires, a
+        JoyentMetadataFetchException will be thrown.
         """
         response = []
 
         def as_ascii():
-            return b''.join(response).decode('ascii')
+            return b"".join(response).decode("ascii")
 
         msg = "Partial response: '%s'"
         while True:
@@ -413,7 +440,7 @@ class JoyentMetadataClient(object):
                 byte = self.fp.read(1)
                 if len(byte) == 0:
                     raise JoyentMetadataTimeoutException(msg % as_ascii())
-                if byte == b'\n':
+                if byte == b"\n":
                     return as_ascii()
                 response.append(byte)
             except OSError as exc:
@@ -424,26 +451,33 @@ class JoyentMetadataClient(object):
                 raise
 
     def _write(self, msg):
-        self.fp.write(msg.encode('ascii'))
+        self.fp.write(msg.encode("ascii"))
         self.fp.flush()
 
     def _negotiate(self):
-        LOG.debug('Negotiating protocol V2')
-        self._write('NEGOTIATE V2\n')
+        LOG.debug("Negotiating protocol V2")
+        self._write("NEGOTIATE V2\n")
         response = self._readline()
         LOG.debug('read "%s"', response)
-        if response != 'V2_OK':
+        if response != "V2_OK":
             raise JoyentMetadataFetchException(
-                'Invalid response "%s" to "NEGOTIATE V2"' % response)
-        LOG.debug('Negotiation complete')
+                'Invalid response "%s" to "NEGOTIATE V2"' % response
+            )
+        LOG.debug("Negotiation complete")
 
     def request(self, rtype, param=None):
-        request_id = '{0:08x}'.format(random.randint(0, 0xffffffff))
-        message_body = ' '.join((request_id, rtype,))
+        request_id = "{0:08x}".format(random.randint(0, 0xFFFFFFFF))
+        message_body = " ".join(
+            (
+                request_id,
+                rtype,
+            )
+        )
         if param:
-            message_body += ' ' + base64.b64encode(param.encode()).decode()
-        msg = 'V2 {0} {1} {2}\n'.format(
-            len(message_body), self._checksum(message_body), message_body)
+            message_body += " " + base64.b64encode(param.encode()).decode()
+        msg = "V2 {0} {1} {2}\n".format(
+            len(message_body), self._checksum(message_body), message_body
+        )
         LOG.debug('Writing "%s" to metadata transport.', msg)
 
         need_close = False
@@ -458,14 +492,14 @@ class JoyentMetadataClient(object):
 
         LOG.debug('Read "%s" from metadata transport.', response)
 
-        if 'SUCCESS' not in response:
+        if "SUCCESS" not in response:
             return None
 
         value = self._get_value_from_frame(request_id, response)
         return value
 
     def get(self, key, default=None, strip=False):
-        result = self.request(rtype='GET', param=key)
+        result = self.request(rtype="GET", param=key)
         if result is None:
             return default
         if result and strip:
@@ -479,18 +513,19 @@ class JoyentMetadataClient(object):
         return json.loads(result)
 
     def list(self):
-        result = self.request(rtype='KEYS')
+        result = self.request(rtype="KEYS")
         if not result:
             return []
-        return result.split('\n')
+        return result.split("\n")
 
     def put(self, key, val):
-        param = b' '.join([base64.b64encode(i.encode())
-                           for i in (key, val)]).decode()
-        return self.request(rtype='PUT', param=param)
+        param = b" ".join(
+            [base64.b64encode(i.encode()) for i in (key, val)]
+        ).decode()
+        return self.request(rtype="PUT", param=param)
 
     def delete(self, key):
-        return self.request(rtype='DELETE', param=key)
+        return self.request(rtype="DELETE", param=key)
 
     def close_transport(self):
         if self.fp:
@@ -519,7 +554,7 @@ class JoyentMetadataSocketClient(JoyentMetadataClient):
     def open_transport(self):
         sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
         sock.connect(self.socketpath)
-        self.fp = sock.makefile('rwb')
+        self.fp = sock.makefile("rwb")
         self._negotiate()
 
     def exists(self):
@@ -530,8 +565,9 @@ class JoyentMetadataSocketClient(JoyentMetadataClient):
 
 
 class JoyentMetadataSerialClient(JoyentMetadataClient):
-    def __init__(self, device, timeout=10, smartos_type=SMARTOS_ENV_KVM,
-                 fp=None):
+    def __init__(
+        self, device, timeout=10, smartos_type=SMARTOS_ENV_KVM, fp=None
+    ):
         super(JoyentMetadataSerialClient, self).__init__(smartos_type, fp)
         self.device = device
         self.timeout = timeout
@@ -550,7 +586,7 @@ class JoyentMetadataSerialClient(JoyentMetadataClient):
         self._negotiate()
 
     def _flush(self):
-        LOG.debug('Flushing input')
+        LOG.debug("Flushing input")
         # Read any pending data
         timeout = self.fp.timeout
         self.fp.timeout = 0.1
@@ -559,7 +595,7 @@ class JoyentMetadataSerialClient(JoyentMetadataClient):
                 self._readline()
             except JoyentMetadataTimeoutException:
                 break
-        LOG.debug('Input empty')
+        LOG.debug("Input empty")
 
         # Send a newline and expect "invalid command".  Keep trying until
         # successful.  Retry rather frequently so that the "Is the host
@@ -571,24 +607,29 @@ class JoyentMetadataSerialClient(JoyentMetadataClient):
             self.fp.timeout = timeout
         while True:
             LOG.debug('Writing newline, expecting "invalid command"')
-            self._write('\n')
+            self._write("\n")
             try:
                 response = self._readline()
-                if response == 'invalid command':
+                if response == "invalid command":
                     break
-                if response == 'FAILURE':
+                if response == "FAILURE":
                     LOG.debug('Got "FAILURE".  Retrying.')
                     continue
                 LOG.warning('Unexpected response "%s" during flush', response)
             except JoyentMetadataTimeoutException:
-                LOG.warning('Timeout while initializing metadata client. '
-                            'Is the host metadata service running?')
+                LOG.warning(
+                    "Timeout while initializing metadata client. "
+                    "Is the host metadata service running?"
+                )
         LOG.debug('Got "invalid command".  Flush complete.')
         self.fp.timeout = timeout
 
     def __repr__(self):
         return "%s(device=%s, timeout=%s)" % (
-            self.__class__.__name__, self.device, self.timeout)
+            self.__class__.__name__,
+            self.device,
+            self.timeout,
+        )
 
 
 class JoyentMetadataLegacySerialClient(JoyentMetadataSerialClient):
@@ -620,7 +661,7 @@ class JoyentMetadataLegacySerialClient(JoyentMetadataSerialClient):
         keys = None
         if self.base64_all is None:
             keys = self.list()
-            if 'base64_all' in keys:
+            if "base64_all" in keys:
                 self.base64_all = util.is_true(self._get("base64_all"))
             else:
                 self.base64_all = False
@@ -633,7 +674,7 @@ class JoyentMetadataLegacySerialClient(JoyentMetadataSerialClient):
             if keys is None:
                 keys = self.list()
             b64_keys = set()
-            if 'base64_keys' in keys:
+            if "base64_keys" in keys:
                 b64_keys = set(self._get("base64_keys").split(","))
 
             # now add any b64-<keyname> that has a true value
@@ -647,8 +688,9 @@ class JoyentMetadataLegacySerialClient(JoyentMetadataSerialClient):
             self.base64_keys = b64_keys
 
     def _get(self, key, default=None, strip=False):
-        return (super(JoyentMetadataLegacySerialClient, self).
-                get(key, default=default, strip=strip))
+        return super(JoyentMetadataLegacySerialClient, self).get(
+            key, default=default, strip=strip
+        )
 
     def is_b64_encoded(self, key, reset=False):
         if key in NO_BASE64_DECODE:
@@ -680,9 +722,12 @@ class JoyentMetadataLegacySerialClient(JoyentMetadataSerialClient):
 
 
 def jmc_client_factory(
-        smartos_type=None, metadata_sockfile=METADATA_SOCKFILE,
-        serial_device=SERIAL_DEVICE, serial_timeout=SERIAL_TIMEOUT,
-        uname_version=None):
+    smartos_type=None,
+    metadata_sockfile=METADATA_SOCKFILE,
+    serial_device=SERIAL_DEVICE,
+    serial_timeout=SERIAL_TIMEOUT,
+    uname_version=None,
+):
 
     if smartos_type is None:
         smartos_type = get_smartos_environ(uname_version)
@@ -691,11 +736,14 @@ def jmc_client_factory(
         return None
     elif smartos_type == SMARTOS_ENV_KVM:
         return JoyentMetadataLegacySerialClient(
-            device=serial_device, timeout=serial_timeout,
-            smartos_type=smartos_type)
+            device=serial_device,
+            timeout=serial_timeout,
+            smartos_type=smartos_type,
+        )
     elif smartos_type == SMARTOS_ENV_LX_BRAND:
-        return JoyentMetadataSocketClient(socketpath=metadata_sockfile,
-                                          smartos_type=smartos_type)
+        return JoyentMetadataSocketClient(
+            socketpath=metadata_sockfile, smartos_type=smartos_type
+        )
 
     raise ValueError("Unknown value for smartos_type: %s" % smartos_type)
 
@@ -708,12 +756,14 @@ def identify_file(content_f):
         LOG.debug("script %s mime type is %s", content_f, f_type)
     except subp.ProcessExecutionError as e:
         util.logexc(
-            LOG, ("Failed to identify script type for %s" % content_f, e))
+            LOG, ("Failed to identify script type for %s" % content_f, e)
+        )
     return None if f_type is None else f_type.strip()
 
 
-def write_boot_content(content, content_f, link=None, shebang=False,
-                       mode=0o400):
+def write_boot_content(
+    content, content_f, link=None, shebang=False, mode=0o400
+):
     """
     Write the content to content_f. Under the following rules:
         1. If no content, remove the file
@@ -747,7 +797,8 @@ def write_boot_content(content, content_f, link=None, shebang=False,
         f_type = identify_file(content_f)
         if f_type == "text/plain":
             util.write_file(
-                content_f, "\n".join(["#!/bin/bash", content]), mode=mode)
+                content_f, "\n".join(["#!/bin/bash", content]), mode=mode
+            )
             LOG.debug("added shebang to file %s", content_f)
 
     if link:
@@ -768,7 +819,7 @@ def get_smartos_environ(uname_version=None, product_name=None):
     # report 'BrandZ virtual linux' as the kernel version
     if uname_version is None:
         uname_version = uname[3]
-    if uname_version == 'BrandZ virtual linux':
+    if uname_version == "BrandZ virtual linux":
         return SMARTOS_ENV_LX_BRAND
 
     if product_name is None:
@@ -776,16 +827,16 @@ def get_smartos_environ(uname_version=None, product_name=None):
     else:
         system_type = product_name
 
-    if system_type and system_type.startswith('SmartDC'):
+    if system_type and system_type.startswith("SmartDC"):
         return SMARTOS_ENV_KVM
 
     return None
 
 
 # Convert SMARTOS 'sdc:nics' data to network_config yaml
-def convert_smartos_network_data(network_data=None,
-                                 dns_servers=None, dns_domain=None,
-                                 routes=None):
+def convert_smartos_network_data(
+    network_data=None, dns_servers=None, dns_domain=None, routes=None
+):
     """Return a dictionary of network_config by parsing provided
        SMARTOS sdc:nics configuration data
 
@@ -810,28 +861,28 @@ def convert_smartos_network_data(network_data=None,
     """
 
     valid_keys = {
-        'physical': [
-            'mac_address',
-            'mtu',
-            'name',
-            'params',
-            'subnets',
-            'type',
+        "physical": [
+            "mac_address",
+            "mtu",
+            "name",
+            "params",
+            "subnets",
+            "type",
         ],
-        'subnet': [
-            'address',
-            'broadcast',
-            'dns_nameservers',
-            'dns_search',
-            'metric',
-            'pointopoint',
-            'routes',
-            'scope',
-            'type',
+        "subnet": [
+            "address",
+            "broadcast",
+            "dns_nameservers",
+            "dns_search",
+            "metric",
+            "pointopoint",
+            "routes",
+            "scope",
+            "type",
         ],
-        'route': [
-            'network',
-            'gateway',
+        "route": [
+            "network",
+            "gateway",
         ],
     }
 
@@ -851,56 +902,64 @@ def convert_smartos_network_data(network_data=None,
         routes = []
 
     def is_valid_ipv4(addr):
-        return '.' in addr
+        return "." in addr
 
     def is_valid_ipv6(addr):
-        return ':' in addr
+        return ":" in addr
 
     pgws = {
-        'ipv4': {'match': is_valid_ipv4, 'gw': None},
-        'ipv6': {'match': is_valid_ipv6, 'gw': None},
+        "ipv4": {"match": is_valid_ipv4, "gw": None},
+        "ipv6": {"match": is_valid_ipv6, "gw": None},
     }
 
     config = []
     for nic in network_data:
-        cfg = dict((k, v) for k, v in nic.items()
-                   if k in valid_keys['physical'])
-        cfg.update({
-            'type': 'physical',
-            'name': nic['interface']})
-        if 'mac' in nic:
-            cfg.update({'mac_address': nic['mac']})
+        cfg = dict(
+            (k, v) for k, v in nic.items() if k in valid_keys["physical"]
+        )
+        cfg.update({"type": "physical", "name": nic["interface"]})
+        if "mac" in nic:
+            cfg.update({"mac_address": nic["mac"]})
 
         subnets = []
-        for ip in nic.get('ips', []):
+        for ip in nic.get("ips", []):
             if ip == "dhcp":
-                subnet = {'type': 'dhcp4'}
+                subnet = {"type": "dhcp4"}
             else:
                 routeents = []
-                subnet = dict((k, v) for k, v in nic.items()
-                              if k in valid_keys['subnet'])
-                subnet.update({
-                    'type': 'static',
-                    'address': ip,
-                })
-
-                proto = 'ipv4' if is_valid_ipv4(ip) else 'ipv6'
+                subnet = dict(
+                    (k, v) for k, v in nic.items() if k in valid_keys["subnet"]
+                )
+                subnet.update(
+                    {
+                        "type": "static",
+                        "address": ip,
+                    }
+                )
+
+                proto = "ipv4" if is_valid_ipv4(ip) else "ipv6"
                 # Only use gateways for 'primary' nics
-                if 'primary' in nic and nic.get('primary', False):
+                if "primary" in nic and nic.get("primary", False):
                     # the ips and gateways list may be N to M, here
                     # we map the ip index into the gateways list,
                     # and handle the case that we could have more ips
                     # than gateways.  we only consume the first gateway
-                    if not pgws[proto]['gw']:
-                        gateways = [gw for gw in nic.get('gateways', [])
-                                    if pgws[proto]['match'](gw)]
+                    if not pgws[proto]["gw"]:
+                        gateways = [
+                            gw
+                            for gw in nic.get("gateways", [])
+                            if pgws[proto]["match"](gw)
+                        ]
                         if len(gateways):
-                            pgws[proto]['gw'] = gateways[0]
-                            subnet.update({'gateway': pgws[proto]['gw']})
+                            pgws[proto]["gw"] = gateways[0]
+                            subnet.update({"gateway": pgws[proto]["gw"]})
 
                 for route in routes:
-                    rcfg = dict((k, v) for k, v in route.items()
-                                if k in valid_keys['route'])
+                    rcfg = dict(
+                        (k, v)
+                        for k, v in route.items()
+                        if k in valid_keys["route"]
+                    )
                     # Linux uses the value of 'gateway' to determine
                     # automatically if the route is a forward/next-hop
                     # (non-local IP for gateway) or an interface/resolver
@@ -913,25 +972,29 @@ def convert_smartos_network_data(network_data=None,
                     # to see if it's in the prefix.  We can then smartly
                     # add or not-add this route.  But for now,
                     # when in doubt, use brute force! Routes for everyone!
-                    rcfg.update({'network': route['dst']})
+                    rcfg.update({"network": route["dst"]})
                     routeents.append(rcfg)
-                    subnet.update({'routes': routeents})
+                    subnet.update({"routes": routeents})
 
             subnets.append(subnet)
-        cfg.update({'subnets': subnets})
+        cfg.update({"subnets": subnets})
         config.append(cfg)
 
     if dns_servers:
         config.append(
-            {'type': 'nameserver', 'address': dns_servers,
-             'search': dns_domain})
+            {
+                "type": "nameserver",
+                "address": dns_servers,
+                "search": dns_domain,
+            }
+        )
 
-    return {'version': 1, 'config': config}
+    return {"version": 1, "config": config}
 
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceSmartOS, (sources.DEP_FILESYSTEM, )),
+    (DataSourceSmartOS, (sources.DEP_FILESYSTEM,)),
 ]
 
 
@@ -942,13 +1005,17 @@ def get_datasource_list(depends):
 
 if __name__ == "__main__":
     import sys
+
     jmc = jmc_client_factory()
     if jmc is None:
         print("Do not appear to be on smartos.")
         sys.exit(1)
     if len(sys.argv) == 1:
-        keys = (list(SMARTOS_ATTRIB_JSON.keys()) +
-                list(SMARTOS_ATTRIB_MAP.keys()) + ['network_config'])
+        keys = (
+            list(SMARTOS_ATTRIB_JSON.keys())
+            + list(SMARTOS_ATTRIB_MAP.keys())
+            + ["network_config"]
+        )
     else:
         keys = sys.argv[1:]
 
@@ -960,14 +1027,19 @@ if __name__ == "__main__":
             keyname = SMARTOS_ATTRIB_JSON[key]
             data[key] = client.get_json(keyname)
         elif key == "network_config":
-            for depkey in ('network-data', 'dns_servers', 'dns_domain',
-                           'routes'):
+            for depkey in (
+                "network-data",
+                "dns_servers",
+                "dns_domain",
+                "routes",
+            ):
                 load_key(client, depkey, data)
             data[key] = convert_smartos_network_data(
-                network_data=data['network-data'],
-                dns_servers=data['dns_servers'],
-                dns_domain=data['dns_domain'],
-                routes=data['routes'])
+                network_data=data["network-data"],
+                dns_servers=data["dns_servers"],
+                dns_domain=data["dns_domain"],
+                routes=data["routes"],
+            )
         else:
             if key in SMARTOS_ATTRIB_MAP:
                 keyname, strip = SMARTOS_ATTRIB_MAP[key]
@@ -981,7 +1053,6 @@ if __name__ == "__main__":
     for key in keys:
         load_key(client=jmc, key=key, data=data)
 
-    print(json.dumps(data, indent=1, sort_keys=True,
-                     separators=(',', ': ')))
+    print(json.dumps(data, indent=1, sort_keys=True, separators=(",", ": ")))
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/DataSourceUpCloud.py b/cloudinit/sources/DataSourceUpCloud.py
index 209b9672..f4b78da5 100644
--- a/cloudinit/sources/DataSourceUpCloud.py
+++ b/cloudinit/sources/DataSourceUpCloud.py
@@ -6,12 +6,9 @@
 # https://developers.upcloud.com/1.3/8-servers/#metadata-service
 
 from cloudinit import log as logging
-from cloudinit import sources
-from cloudinit import util
 from cloudinit import net as cloudnet
+from cloudinit import sources, util
 from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError
-
-
 from cloudinit.sources.helpers import upcloud as uc_helper
 
 LOG = logging.getLogger(__name__)
@@ -152,7 +149,7 @@ class DataSourceUpCloudLocal(DataSourceUpCloud):
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceUpCloudLocal, (sources.DEP_FILESYSTEM, )),
+    (DataSourceUpCloudLocal, (sources.DEP_FILESYSTEM,)),
     (DataSourceUpCloud, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
 ]
 
diff --git a/cloudinit/sources/DataSourceVMware.py b/cloudinit/sources/DataSourceVMware.py
index 22ca63de..ed7f487a 100644
--- a/cloudinit/sources/DataSourceVMware.py
+++ b/cloudinit/sources/DataSourceVMware.py
@@ -63,20 +63,19 @@ Netifaces (https://github.com/al45tair/netifaces)
 
 import collections
 import copy
-from distutils.spawn import find_executable
 import ipaddress
 import json
 import os
 import socket
 import time
-
-from cloudinit import dmi, log as logging
-from cloudinit import sources
-from cloudinit import util
-from cloudinit.subp import subp, ProcessExecutionError
+from distutils.spawn import find_executable
 
 import netifaces
 
+from cloudinit import dmi
+from cloudinit import log as logging
+from cloudinit import sources, util
+from cloudinit.subp import ProcessExecutionError, subp
 
 PRODUCT_UUID_FILE_PATH = "/sys/class/dmi/id/product_uuid"
 
@@ -460,7 +459,7 @@ def guestinfo_set_value(key, value, vmware_rpctool=VMWARE_RPCTOOL):
         subp(
             [
                 vmware_rpctool,
-                ("info-set %s %s" % (get_guestinfo_key_name(key), value)),
+                "info-set %s %s" % (get_guestinfo_key_name(key), value),
             ]
         )
         return True
diff --git a/cloudinit/sources/DataSourceVultr.py b/cloudinit/sources/DataSourceVultr.py
index abeefbc5..13f7c24d 100644
--- a/cloudinit/sources/DataSourceVultr.py
+++ b/cloudinit/sources/DataSourceVultr.py
@@ -5,35 +5,37 @@
 # Vultr Metadata API:
 # https://www.vultr.com/metadata/
 
-from cloudinit import log as log
-from cloudinit import sources
-from cloudinit import util
-from cloudinit import version
-
 import cloudinit.sources.helpers.vultr as vultr
+from cloudinit import log as log
+from cloudinit import sources, util, version
 
 LOG = log.getLogger(__name__)
 BUILTIN_DS_CONFIG = {
-    'url': 'http://169.254.169.254',
-    'retries': 30,
-    'timeout': 10,
-    'wait': 5,
-    'user-agent': 'Cloud-Init/%s - OS: %s Variant: %s' %
-                  (version.version_string(),
-                   util.system_info()['system'],
-                   util.system_info()['variant'])
+    "url": "http://169.254.169.254",
+    "retries": 30,
+    "timeout": 10,
+    "wait": 5,
+    "user-agent": "Cloud-Init/%s - OS: %s Variant: %s"
+    % (
+        version.version_string(),
+        util.system_info()["system"],
+        util.system_info()["variant"],
+    ),
 }
 
 
 class DataSourceVultr(sources.DataSource):
 
-    dsname = 'Vultr'
+    dsname = "Vultr"
 
     def __init__(self, sys_cfg, distro, paths):
         super(DataSourceVultr, self).__init__(sys_cfg, distro, paths)
-        self.ds_cfg = util.mergemanydict([
-            util.get_cfg_by_path(sys_cfg, ["datasource", "Vultr"], {}),
-            BUILTIN_DS_CONFIG])
+        self.ds_cfg = util.mergemanydict(
+            [
+                util.get_cfg_by_path(sys_cfg, ["datasource", "Vultr"], {}),
+                BUILTIN_DS_CONFIG,
+            ]
+        )
 
     # Initiate data and check if Vultr
     def _get_data(self):
@@ -46,8 +48,8 @@ class DataSourceVultr(sources.DataSource):
 
         # Fetch metadata
         self.metadata = self.get_metadata()
-        self.metadata['instance-id'] = self.metadata['instanceid']
-        self.metadata['local-hostname'] = self.metadata['hostname']
+        self.metadata["instance-id"] = self.metadata["instanceid"]
+        self.metadata["local-hostname"] = self.metadata["hostname"]
         self.userdata_raw = self.metadata["user-data"]
 
         # Generate config and process data
@@ -55,9 +57,9 @@ class DataSourceVultr(sources.DataSource):
 
         # Dump some data so diagnosing failures is manageable
         LOG.debug("Vultr Vendor Config:")
-        LOG.debug(util.json_dumps(self.metadata['vendor-data']))
-        LOG.debug("SUBID: %s", self.metadata['instance-id'])
-        LOG.debug("Hostname: %s", self.metadata['local-hostname'])
+        LOG.debug(util.json_dumps(self.metadata["vendor-data"]))
+        LOG.debug("SUBID: %s", self.metadata["instance-id"])
+        LOG.debug("Hostname: %s", self.metadata["local-hostname"])
         if self.userdata_raw is not None:
             LOG.debug("User-Data:")
             LOG.debug(self.userdata_raw)
@@ -70,16 +72,16 @@ class DataSourceVultr(sources.DataSource):
         if "cloud_interfaces" in md:
             # In the future we will just drop pre-configured
             # network configs into the array. They need names though.
-            self.netcfg = vultr.add_interface_names(md['cloud_interfaces'])
+            self.netcfg = vultr.add_interface_names(md["cloud_interfaces"])
         else:
-            self.netcfg = vultr.generate_network_config(md['interfaces'])
+            self.netcfg = vultr.generate_network_config(md["interfaces"])
 
         # Grab vendordata
-        self.vendordata_raw = md['vendor-data']
+        self.vendordata_raw = md["vendor-data"]
 
         # Default hostname is "guest" for whitelabel
-        if self.metadata['local-hostname'] == "":
-            self.metadata['local-hostname'] = "guest"
+        if self.metadata["local-hostname"] == "":
+            self.metadata["local-hostname"] = "guest"
 
         self.userdata_raw = md["user-data"]
         if self.userdata_raw == "":
@@ -87,11 +89,13 @@ class DataSourceVultr(sources.DataSource):
 
     # Get the metadata by flag
     def get_metadata(self):
-        return vultr.get_metadata(self.ds_cfg['url'],
-                                  self.ds_cfg['timeout'],
-                                  self.ds_cfg['retries'],
-                                  self.ds_cfg['wait'],
-                                  self.ds_cfg['user-agent'])
+        return vultr.get_metadata(
+            self.ds_cfg["url"],
+            self.ds_cfg["timeout"],
+            self.ds_cfg["retries"],
+            self.ds_cfg["wait"],
+            self.ds_cfg["user-agent"],
+        )
 
     # Compare subid as instance id
     def check_instance_id(self, sys_cfg):
@@ -102,7 +106,7 @@ class DataSourceVultr(sources.DataSource):
         if vultr.is_baremetal():
             return False
 
-        subid = vultr.get_sysinfo()['subid']
+        subid = vultr.get_sysinfo()["subid"]
         return sources.instance_id_matches_system_uuid(subid)
 
     # Currently unsupported
@@ -117,7 +121,7 @@ class DataSourceVultr(sources.DataSource):
 
 # Used to match classes to dependencies
 datasources = [
-    (DataSourceVultr, (sources.DEP_FILESYSTEM, )),
+    (DataSourceVultr, (sources.DEP_FILESYSTEM,)),
 ]
 
 
@@ -133,12 +137,14 @@ if __name__ == "__main__":
         print("Machine is not a Vultr instance")
         sys.exit(1)
 
-    md = vultr.get_metadata(BUILTIN_DS_CONFIG['url'],
-                            BUILTIN_DS_CONFIG['timeout'],
-                            BUILTIN_DS_CONFIG['retries'],
-                            BUILTIN_DS_CONFIG['wait'],
-                            BUILTIN_DS_CONFIG['user-agent'])
-    config = md['vendor-data']
+    md = vultr.get_metadata(
+        BUILTIN_DS_CONFIG["url"],
+        BUILTIN_DS_CONFIG["timeout"],
+        BUILTIN_DS_CONFIG["retries"],
+        BUILTIN_DS_CONFIG["wait"],
+        BUILTIN_DS_CONFIG["user-agent"],
+    )
+    config = md["vendor-data"]
     sysinfo = vultr.get_sysinfo()
 
     print(util.json_dumps(sysinfo))
diff --git a/cloudinit/sources/__init__.py b/cloudinit/sources/__init__.py
index f2f2343c..9083f399 100644
--- a/cloudinit/sources/__init__.py
+++ b/cloudinit/sources/__init__.py
@@ -15,11 +15,9 @@ import os
 from collections import namedtuple
 from typing import Dict, List  # noqa: F401
 
-from cloudinit import dmi
-from cloudinit import importer
+from cloudinit import dmi, importer
 from cloudinit import log as logging
-from cloudinit import net
-from cloudinit import type_utils
+from cloudinit import net, type_utils
 from cloudinit import user_data as ud
 from cloudinit import util
 from cloudinit.atomic_helper import write_json
@@ -38,42 +36,44 @@ VALID_DSMODES = [DSMODE_DISABLED, DSMODE_LOCAL, DSMODE_NETWORK]
 
 DEP_FILESYSTEM = "FILESYSTEM"
 DEP_NETWORK = "NETWORK"
-DS_PREFIX = 'DataSource'
+DS_PREFIX = "DataSource"
 
 EXPERIMENTAL_TEXT = (
     "EXPERIMENTAL: The structure and format of content scoped under the 'ds'"
-    " key may change in subsequent releases of cloud-init.")
+    " key may change in subsequent releases of cloud-init."
+)
 
 
 # File in which public available instance meta-data is written
 # security-sensitive key values are redacted from this world-readable file
-INSTANCE_JSON_FILE = 'instance-data.json'
+INSTANCE_JSON_FILE = "instance-data.json"
 # security-sensitive key values are present in this root-readable file
-INSTANCE_JSON_SENSITIVE_FILE = 'instance-data-sensitive.json'
-REDACT_SENSITIVE_VALUE = 'redacted for non-root user'
+INSTANCE_JSON_SENSITIVE_FILE = "instance-data-sensitive.json"
+REDACT_SENSITIVE_VALUE = "redacted for non-root user"
 
 # Key which can be provide a cloud's official product name to cloud-init
-METADATA_CLOUD_NAME_KEY = 'cloud-name'
+METADATA_CLOUD_NAME_KEY = "cloud-name"
 
 UNSET = "_unset"
-METADATA_UNKNOWN = 'unknown'
+METADATA_UNKNOWN = "unknown"
 
 LOG = logging.getLogger(__name__)
 
 # CLOUD_ID_REGION_PREFIX_MAP format is:
 #  <region-match-prefix>: (<new-cloud-id>: <test_allowed_cloud_callable>)
 CLOUD_ID_REGION_PREFIX_MAP = {
-    'cn-': ('aws-china', lambda c: c == 'aws'),    # only change aws regions
-    'us-gov-': ('aws-gov', lambda c: c == 'aws'),  # only change aws regions
-    'china': ('azure-china', lambda c: c == 'azure'),  # only change azure
+    "cn-": ("aws-china", lambda c: c == "aws"),  # only change aws regions
+    "us-gov-": ("aws-gov", lambda c: c == "aws"),  # only change aws regions
+    "china": ("azure-china", lambda c: c == "azure"),  # only change azure
 }
 
 # NetworkConfigSource represents the canonical list of network config sources
 # that cloud-init knows about.  (Python 2.7 lacks PEP 435, so use a singleton
 # namedtuple as an enum; see https://stackoverflow.com/a/6971002)
-_NETCFG_SOURCE_NAMES = ('cmdline', 'ds', 'system_cfg', 'fallback', 'initramfs')
-NetworkConfigSource = namedtuple('NetworkConfigSource',
-                                 _NETCFG_SOURCE_NAMES)(*_NETCFG_SOURCE_NAMES)
+_NETCFG_SOURCE_NAMES = ("cmdline", "ds", "system_cfg", "fallback", "initramfs")
+NetworkConfigSource = namedtuple("NetworkConfigSource", _NETCFG_SOURCE_NAMES)(
+    *_NETCFG_SOURCE_NAMES
+)
 
 
 class DatasourceUnpickleUserDataError(Exception):
@@ -88,7 +88,7 @@ class InvalidMetaDataException(Exception):
     """Raised when metadata is broken, unavailable or disabled."""
 
 
-def process_instance_metadata(metadata, key_path='', sensitive_keys=()):
+def process_instance_metadata(metadata, key_path="", sensitive_keys=()):
     """Process all instance metadata cleaning it up for persisting as json.
 
     Strip ci-b64 prefix and catalog any 'base64_encoded_keys' as a list
@@ -100,22 +100,23 @@ def process_instance_metadata(metadata, key_path='', sensitive_keys=()):
     sens_keys = []
     for key, val in metadata.items():
         if key_path:
-            sub_key_path = key_path + '/' + key
+            sub_key_path = key_path + "/" + key
         else:
             sub_key_path = key
         if key in sensitive_keys or sub_key_path in sensitive_keys:
             sens_keys.append(sub_key_path)
-        if isinstance(val, str) and val.startswith('ci-b64:'):
+        if isinstance(val, str) and val.startswith("ci-b64:"):
             base64_encoded_keys.append(sub_key_path)
-            md_copy[key] = val.replace('ci-b64:', '')
+            md_copy[key] = val.replace("ci-b64:", "")
         if isinstance(val, dict):
             return_val = process_instance_metadata(
-                val, sub_key_path, sensitive_keys)
-            base64_encoded_keys.extend(return_val.pop('base64_encoded_keys'))
-            sens_keys.extend(return_val.pop('sensitive_keys'))
+                val, sub_key_path, sensitive_keys
+            )
+            base64_encoded_keys.extend(return_val.pop("base64_encoded_keys"))
+            sens_keys.extend(return_val.pop("sensitive_keys"))
             md_copy[key] = return_val
-    md_copy['base64_encoded_keys'] = sorted(base64_encoded_keys)
-    md_copy['sensitive_keys'] = sorted(sens_keys)
+    md_copy["base64_encoded_keys"] = sorted(base64_encoded_keys)
+    md_copy["sensitive_keys"] = sorted(sens_keys)
     return md_copy
 
 
@@ -124,11 +125,11 @@ def redact_sensitive_keys(metadata, redact_value=REDACT_SENSITIVE_VALUE):
 
     Replace any keys values listed in 'sensitive_keys' with redact_value.
     """
-    if not metadata.get('sensitive_keys', []):
+    if not metadata.get("sensitive_keys", []):
         return metadata
     md_copy = copy.deepcopy(metadata)
-    for key_path in metadata.get('sensitive_keys'):
-        path_parts = key_path.split('/')
+    for key_path in metadata.get("sensitive_keys"):
+        path_parts = key_path.split("/")
         obj = md_copy
         for path in path_parts:
             if isinstance(obj[path], dict) and path != path_parts[-1]:
@@ -138,18 +139,24 @@ def redact_sensitive_keys(metadata, redact_value=REDACT_SENSITIVE_VALUE):
 
 
 URLParams = namedtuple(
-    'URLParms', ['max_wait_seconds', 'timeout_seconds',
-                 'num_retries', 'sec_between_retries'])
+    "URLParms",
+    [
+        "max_wait_seconds",
+        "timeout_seconds",
+        "num_retries",
+        "sec_between_retries",
+    ],
+)
 
 
 class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
     dsmode = DSMODE_NETWORK
-    default_locale = 'en_US.UTF-8'
+    default_locale = "en_US.UTF-8"
 
     # Datasource name needs to be set by subclasses to determine which
     # cloud-config datasource key is loaded
-    dsname = '_undef'
+    dsname = "_undef"
 
     # Cached cloud_name as determined by _get_cloud_name
     _cloud_name = None
@@ -170,15 +177,17 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
     # configuration will be used without considering any that follow.)  This
     # should always be a subset of the members of NetworkConfigSource with no
     # duplicate entries.
-    network_config_sources = (NetworkConfigSource.cmdline,
-                              NetworkConfigSource.initramfs,
-                              NetworkConfigSource.system_cfg,
-                              NetworkConfigSource.ds)
+    network_config_sources = (
+        NetworkConfigSource.cmdline,
+        NetworkConfigSource.initramfs,
+        NetworkConfigSource.system_cfg,
+        NetworkConfigSource.ds,
+    )
 
     # read_url_params
-    url_max_wait = -1            # max_wait < 0 means do not wait
-    url_timeout = 10             # timeout for each metadata url read attempt
-    url_retries = 5              # number of times to retry url upon 404
+    url_max_wait = -1  # max_wait < 0 means do not wait
+    url_timeout = 10  # timeout for each metadata url read attempt
+    url_retries = 5  # number of times to retry url upon 404
     url_sec_between_retries = 1  # amount of seconds to wait between retries
 
     # The datasource defines a set of supported EventTypes during which
@@ -192,30 +201,43 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
     # would call default_update_events['network'].add(EventType.BOOT).
 
     # Default: generate network config on new instance id (first boot).
-    supported_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-        EventType.BOOT,
-        EventType.BOOT_LEGACY,
-        EventType.HOTPLUG,
-    }}
-    default_update_events = {EventScope.NETWORK: {
-        EventType.BOOT_NEW_INSTANCE,
-    }}
+    supported_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+            EventType.BOOT,
+            EventType.BOOT_LEGACY,
+            EventType.HOTPLUG,
+        }
+    }
+    default_update_events = {
+        EventScope.NETWORK: {
+            EventType.BOOT_NEW_INSTANCE,
+        }
+    }
 
     # N-tuple listing default values for any metadata-related class
     # attributes cached on an instance by a process_data runs. These attribute
     # values are reset via clear_cached_attrs during any update_metadata call.
     cached_attr_defaults = (
-        ('ec2_metadata', UNSET), ('network_json', UNSET),
-        ('metadata', {}), ('userdata', None), ('userdata_raw', None),
-        ('vendordata', None), ('vendordata_raw', None),
-        ('vendordata2', None), ('vendordata2_raw', None))
+        ("ec2_metadata", UNSET),
+        ("network_json", UNSET),
+        ("metadata", {}),
+        ("userdata", None),
+        ("userdata_raw", None),
+        ("vendordata", None),
+        ("vendordata_raw", None),
+        ("vendordata2", None),
+        ("vendordata2_raw", None),
+    )
 
     _dirty_cache = False
 
     # N-tuple of keypaths or keynames redact from instance-data.json for
     # non-root users
-    sensitive_metadata_keys = ('merged_cfg', 'security-credentials',)
+    sensitive_metadata_keys = (
+        "merged_cfg",
+        "security-credentials",
+    )
 
     _ci_pkl_version = 1
 
@@ -232,7 +254,8 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
         self.vendordata2_raw = None
 
         self.ds_cfg = util.get_cfg_by_path(
-            self.sys_cfg, ("datasource", self.dsname), {})
+            self.sys_cfg, ("datasource", self.dsname), {}
+        )
         if not self.ds_cfg:
             self.ds_cfg = {}
 
@@ -243,11 +266,11 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
     def _unpickle(self, ci_pkl_version: int) -> None:
         """Perform deserialization fixes for Paths."""
-        if not hasattr(self, 'vendordata2'):
+        if not hasattr(self, "vendordata2"):
             self.vendordata2 = None
-        if not hasattr(self, 'vendordata2_raw'):
+        if not hasattr(self, "vendordata2_raw"):
             self.vendordata2_raw = None
-        if hasattr(self, 'userdata') and self.userdata is not None:
+        if hasattr(self, "userdata") and self.userdata is not None:
             # If userdata stores MIME data, on < python3.6 it will be
             # missing the 'policy' attribute that exists on >=python3.6.
             # Calling str() on the userdata will attempt to access this
@@ -258,7 +281,8 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             except AttributeError as e:
                 LOG.debug(
                     "Unable to unpickle datasource: %s."
-                    " Ignoring current cache.", e
+                    " Ignoring current cache.",
+                    e,
                 )
                 raise DatasourceUnpickleUserDataError() from e
 
@@ -275,28 +299,30 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
         # metadata to discover that content
         sysinfo = instance_data["sys_info"]
         return {
-            'v1': {
-                '_beta_keys': ['subplatform'],
-                'availability-zone': availability_zone,
-                'availability_zone': availability_zone,
-                'cloud-name': self.cloud_name,
-                'cloud_name': self.cloud_name,
-                'distro': sysinfo["dist"][0],
-                'distro_version': sysinfo["dist"][1],
-                'distro_release': sysinfo["dist"][2],
-                'platform': self.platform_type,
-                'public_ssh_keys': self.get_public_ssh_keys(),
-                'python_version': sysinfo["python"],
-                'instance-id': instance_id,
-                'instance_id': instance_id,
-                'kernel_release': sysinfo["uname"][2],
-                'local-hostname': local_hostname,
-                'local_hostname': local_hostname,
-                'machine': sysinfo["uname"][4],
-                'region': self.region,
-                'subplatform': self.subplatform,
-                'system_platform': sysinfo["platform"],
-                'variant': sysinfo["variant"]}}
+            "v1": {
+                "_beta_keys": ["subplatform"],
+                "availability-zone": availability_zone,
+                "availability_zone": availability_zone,
+                "cloud-name": self.cloud_name,
+                "cloud_name": self.cloud_name,
+                "distro": sysinfo["dist"][0],
+                "distro_version": sysinfo["dist"][1],
+                "distro_release": sysinfo["dist"][2],
+                "platform": self.platform_type,
+                "public_ssh_keys": self.get_public_ssh_keys(),
+                "python_version": sysinfo["python"],
+                "instance-id": instance_id,
+                "instance_id": instance_id,
+                "kernel_release": sysinfo["uname"][2],
+                "local-hostname": local_hostname,
+                "local_hostname": local_hostname,
+                "machine": sysinfo["uname"][4],
+                "region": self.region,
+                "subplatform": self.subplatform,
+                "system_platform": sysinfo["platform"],
+                "variant": sysinfo["variant"],
+            }
+        }
 
     def clear_cached_attrs(self, attr_defaults=()):
         """Reset any cached metadata attributes to datasource defaults.
@@ -337,48 +363,51 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
         @return True on successful write, False otherwise.
         """
-        if hasattr(self, '_crawled_metadata'):
+        if hasattr(self, "_crawled_metadata"):
             # Any datasource with _crawled_metadata will best represent
             # most recent, 'raw' metadata
             crawled_metadata = copy.deepcopy(
-                getattr(self, '_crawled_metadata'))
-            crawled_metadata.pop('user-data', None)
-            crawled_metadata.pop('vendor-data', None)
-            instance_data = {'ds': crawled_metadata}
+                getattr(self, "_crawled_metadata")
+            )
+            crawled_metadata.pop("user-data", None)
+            crawled_metadata.pop("vendor-data", None)
+            instance_data = {"ds": crawled_metadata}
         else:
-            instance_data = {'ds': {'meta_data': self.metadata}}
-            if hasattr(self, 'network_json'):
-                network_json = getattr(self, 'network_json')
+            instance_data = {"ds": {"meta_data": self.metadata}}
+            if hasattr(self, "network_json"):
+                network_json = getattr(self, "network_json")
                 if network_json != UNSET:
-                    instance_data['ds']['network_json'] = network_json
-            if hasattr(self, 'ec2_metadata'):
-                ec2_metadata = getattr(self, 'ec2_metadata')
+                    instance_data["ds"]["network_json"] = network_json
+            if hasattr(self, "ec2_metadata"):
+                ec2_metadata = getattr(self, "ec2_metadata")
                 if ec2_metadata != UNSET:
-                    instance_data['ds']['ec2_metadata'] = ec2_metadata
-        instance_data['ds']['_doc'] = EXPERIMENTAL_TEXT
+                    instance_data["ds"]["ec2_metadata"] = ec2_metadata
+        instance_data["ds"]["_doc"] = EXPERIMENTAL_TEXT
         # Add merged cloud.cfg and sys info for jinja templates and cli query
-        instance_data['merged_cfg'] = copy.deepcopy(self.sys_cfg)
-        instance_data['merged_cfg']['_doc'] = (
-            'Merged cloud-init system config from /etc/cloud/cloud.cfg and'
-            ' /etc/cloud/cloud.cfg.d/')
-        instance_data['sys_info'] = util.system_info()
-        instance_data.update(
-            self._get_standardized_metadata(instance_data))
+        instance_data["merged_cfg"] = copy.deepcopy(self.sys_cfg)
+        instance_data["merged_cfg"]["_doc"] = (
+            "Merged cloud-init system config from /etc/cloud/cloud.cfg and"
+            " /etc/cloud/cloud.cfg.d/"
+        )
+        instance_data["sys_info"] = util.system_info()
+        instance_data.update(self._get_standardized_metadata(instance_data))
         try:
             # Process content base64encoding unserializable values
             content = util.json_dumps(instance_data)
             # Strip base64: prefix and set base64_encoded_keys list.
             processed_data = process_instance_metadata(
                 json.loads(content),
-                sensitive_keys=self.sensitive_metadata_keys)
+                sensitive_keys=self.sensitive_metadata_keys,
+            )
         except TypeError as e:
-            LOG.warning('Error persisting instance-data.json: %s', str(e))
+            LOG.warning("Error persisting instance-data.json: %s", str(e))
             return False
         except UnicodeDecodeError as e:
-            LOG.warning('Error persisting instance-data.json: %s', str(e))
+            LOG.warning("Error persisting instance-data.json: %s", str(e))
             return False
-        json_sensitive_file = os.path.join(self.paths.run_dir,
-                                           INSTANCE_JSON_SENSITIVE_FILE)
+        json_sensitive_file = os.path.join(
+            self.paths.run_dir, INSTANCE_JSON_SENSITIVE_FILE
+        )
         write_json(json_sensitive_file, processed_data, mode=0o600)
         json_file = os.path.join(self.paths.run_dir, INSTANCE_JSON_FILE)
         # World readable
@@ -388,8 +417,9 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
     def _get_data(self):
         """Walk metadata sources, process crawled data and save attributes."""
         raise NotImplementedError(
-            'Subclasses of DataSource must implement _get_data which'
-            ' sets self.metadata, vendordata_raw and userdata_raw.')
+            "Subclasses of DataSource must implement _get_data which"
+            " sets self.metadata, vendordata_raw and userdata_raw."
+        )
 
     def get_url_params(self):
         """Return the Datasource's prefered url_read parameters.
@@ -404,37 +434,50 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             max_wait = int(self.ds_cfg.get("max_wait", self.url_max_wait))
         except ValueError:
             util.logexc(
-                LOG, "Config max_wait '%s' is not an int, using default '%s'",
-                self.ds_cfg.get("max_wait"), max_wait)
+                LOG,
+                "Config max_wait '%s' is not an int, using default '%s'",
+                self.ds_cfg.get("max_wait"),
+                max_wait,
+            )
 
         timeout = self.url_timeout
         try:
-            timeout = max(
-                0, int(self.ds_cfg.get("timeout", self.url_timeout)))
+            timeout = max(0, int(self.ds_cfg.get("timeout", self.url_timeout)))
         except ValueError:
             timeout = self.url_timeout
             util.logexc(
-                LOG, "Config timeout '%s' is not an int, using default '%s'",
-                self.ds_cfg.get('timeout'), timeout)
+                LOG,
+                "Config timeout '%s' is not an int, using default '%s'",
+                self.ds_cfg.get("timeout"),
+                timeout,
+            )
 
         retries = self.url_retries
         try:
             retries = int(self.ds_cfg.get("retries", self.url_retries))
         except Exception:
             util.logexc(
-                LOG, "Config retries '%s' is not an int, using default '%s'",
-                self.ds_cfg.get('retries'), retries)
+                LOG,
+                "Config retries '%s' is not an int, using default '%s'",
+                self.ds_cfg.get("retries"),
+                retries,
+            )
 
         sec_between_retries = self.url_sec_between_retries
         try:
-            sec_between_retries = int(self.ds_cfg.get(
-                "sec_between_retries",
-                self.url_sec_between_retries))
+            sec_between_retries = int(
+                self.ds_cfg.get(
+                    "sec_between_retries", self.url_sec_between_retries
+                )
+            )
         except Exception:
             util.logexc(
-                LOG, "Config sec_between_retries '%s' is not an int,"
-                     " using default '%s'",
-                self.ds_cfg.get("sec_between_retries"), sec_between_retries)
+                LOG,
+                "Config sec_between_retries '%s' is not an int,"
+                " using default '%s'",
+                self.ds_cfg.get("sec_between_retries"),
+                sec_between_retries,
+            )
 
         return URLParams(max_wait, timeout, retries, sec_between_retries)
 
@@ -462,13 +505,13 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             self._fallback_interface = net.find_fallback_nic()
             if self._fallback_interface is None:
                 LOG.warning(
-                    "Did not find a fallback interface on %s.",
-                    self.cloud_name)
+                    "Did not find a fallback interface on %s.", self.cloud_name
+                )
         return self._fallback_interface
 
     @property
     def platform_type(self):
-        if not hasattr(self, '_platform_type'):
+        if not hasattr(self, "_platform_type"):
             # Handle upgrade path where pickled datasource has no _platform.
             self._platform_type = self.dsname.lower()
         if not self._platform_type:
@@ -487,7 +530,7 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             nocloud:   seed-dir (/seed/dir/path)
             lxd:   nocloud (/seed/dir/path)
         """
-        if not hasattr(self, '_subplatform'):
+        if not hasattr(self, "_subplatform"):
             # Handle upgrade path where pickled datasource has no _platform.
             self._subplatform = self._get_subplatform()
         if not self._subplatform:
@@ -496,8 +539,8 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
     def _get_subplatform(self):
         """Subclasses should implement to return a "slug (detail)" string."""
-        if hasattr(self, 'metadata_address'):
-            return 'metadata (%s)' % getattr(self, 'metadata_address')
+        if hasattr(self, "metadata_address"):
+            return "metadata (%s)" % getattr(self, "metadata_address")
         return METADATA_UNKNOWN
 
     @property
@@ -516,8 +559,10 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             else:
                 self._cloud_name = self._get_cloud_name().lower()
                 LOG.debug(
-                    'Ignoring metadata provided key %s: non-string type %s',
-                    METADATA_CLOUD_NAME_KEY, type(cloud_name))
+                    "Ignoring metadata provided key %s: non-string type %s",
+                    METADATA_CLOUD_NAME_KEY,
+                    type(cloud_name),
+                )
         else:
             self._cloud_name = self._get_cloud_name().lower()
         return self._cloud_name
@@ -534,8 +579,8 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
     def launch_index(self):
         if not self.metadata:
             return None
-        if 'launch-index' in self.metadata:
-            return self.metadata['launch-index']
+        if "launch-index" in self.metadata:
+            return self.metadata["launch-index"]
         return None
 
     def _filter_xdata(self, processed_ud):
@@ -567,7 +612,7 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
         return {}
 
     def get_public_ssh_keys(self):
-        return normalize_pubkey_data(self.metadata.get('public-keys'))
+        return normalize_pubkey_data(self.metadata.get("public-keys"))
 
     def publish_host_keys(self, hostkeys):
         """Publish the public SSH host keys (found in /etc/ssh/*.pub).
@@ -589,7 +634,7 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             if not short_name.startswith(nfrom):
                 continue
             for nto in tlist:
-                cand = "/dev/%s%s" % (nto, short_name[len(nfrom):])
+                cand = "/dev/%s%s" % (nto, short_name[len(nfrom) :])
                 if os.path.exists(cand):
                     return cand
         return None
@@ -614,20 +659,21 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
     @property
     def availability_zone(self):
         top_level_az = self.metadata.get(
-            'availability-zone', self.metadata.get('availability_zone'))
+            "availability-zone", self.metadata.get("availability_zone")
+        )
         if top_level_az:
             return top_level_az
-        return self.metadata.get('placement', {}).get('availability-zone')
+        return self.metadata.get("placement", {}).get("availability-zone")
 
     @property
     def region(self):
-        return self.metadata.get('region')
+        return self.metadata.get("region")
 
     def get_instance_id(self):
-        if not self.metadata or 'instance-id' not in self.metadata:
+        if not self.metadata or "instance-id" not in self.metadata:
             # Return a magic not really instance id string
             return "iid-datasource"
-        return str(self.metadata['instance-id'])
+        return str(self.metadata["instance-id"])
 
     def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
         """Get hostname or fqdn from the datasource. Look it up if desired.
@@ -645,7 +691,7 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
         defhost = "localhost"
         domain = defdomain
 
-        if not self.metadata or not self.metadata.get('local-hostname'):
+        if not self.metadata or not self.metadata.get("local-hostname"):
             if metadata_only:
                 return None
             # this is somewhat questionable really.
@@ -666,14 +712,14 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
         else:
             # if there is an ipv4 address in 'local-hostname', then
             # make up a hostname (LP: #475354) in format ip-xx.xx.xx.xx
-            lhost = self.metadata['local-hostname']
+            lhost = self.metadata["local-hostname"]
             if net.is_ipv4_address(lhost):
                 toks = []
                 if resolve_ip:
                     toks = util.gethostbyaddr(lhost)
 
                 if toks:
-                    toks = str(toks).split('.')
+                    toks = str(toks).split(".")
                 else:
                     toks = ["ip-%s" % lhost.replace(".", "-")]
             else:
@@ -681,7 +727,7 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
 
         if len(toks) > 1:
             hostname = toks[0]
-            domain = '.'.join(toks[1:])
+            domain = ".".join(toks[1:])
         else:
             hostname = toks[0]
 
@@ -696,7 +742,10 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
     def get_supported_events(self, source_event_types: List[EventType]):
         supported_events = {}  # type: Dict[EventScope, set]
         for event in source_event_types:
-            for update_scope, update_events in self.supported_update_events.items():  # noqa: E501
+            for (
+                update_scope,
+                update_events,
+            ) in self.supported_update_events.items():
                 if event in update_events:
                     if not supported_events.get(update_scope):
                         supported_events[update_scope] = set()
@@ -723,18 +772,22 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             LOG.debug(
                 "Update datasource metadata and %s config due to events: %s",
                 scope.value,
-                ', '.join([event.value for event in matched_events]))
+                ", ".join([event.value for event in matched_events]),
+            )
             # Each datasource has a cached config property which needs clearing
             # Once cleared that config property will be regenerated from
             # current metadata.
-            self.clear_cached_attrs((('_%s_config' % scope, UNSET),))
+            self.clear_cached_attrs((("_%s_config" % scope, UNSET),))
         if supported_events:
             self.clear_cached_attrs()
             result = self.get_data()
             if result:
                 return True
-        LOG.debug("Datasource %s not updated for events: %s", self,
-                  ', '.join([event.value for event in source_event_types]))
+        LOG.debug(
+            "Datasource %s not updated for events: %s",
+            self,
+            ", ".join([event.value for event in source_event_types]),
+        )
         return False
 
     def check_instance_id(self, sys_cfg):
@@ -756,8 +809,9 @@ class DataSource(CloudInitPickleMixin, metaclass=abc.ABCMeta):
             if candidate in valid:
                 return candidate
             else:
-                LOG.warning("invalid dsmode '%s', using default=%s",
-                            candidate, default)
+                LOG.warning(
+                    "invalid dsmode '%s', using default=%s", candidate, default
+                )
                 return default
 
         return default
@@ -836,7 +890,8 @@ def find_source(sys_cfg, distro, paths, ds_deps, cfg_list, pkg_list, reporter):
             name="search-%s" % name.replace("DataSource", ""),
             description="searching for %s data from %s" % (mode, name),
             message="no %s data found from %s" % (mode, name),
-            parent=reporter)
+            parent=reporter,
+        )
         try:
             with myrep:
                 LOG.debug("Seeing if we can get any data from %s", cls)
@@ -849,8 +904,9 @@ def find_source(sys_cfg, distro, paths, ds_deps, cfg_list, pkg_list, reporter):
         except Exception:
             util.logexc(LOG, "Getting data from %s failed", cls)
 
-    msg = ("Did not find any data source,"
-           " searched classes: (%s)") % (", ".join(ds_names))
+    msg = "Did not find any data source, searched classes: (%s)" % ", ".join(
+        ds_names
+    )
     raise DataSourceNotFoundException(msg)
 
 
@@ -860,15 +916,19 @@ def find_source(sys_cfg, distro, paths, ds_deps, cfg_list, pkg_list, reporter):
 # Return an ordered list of classes that match (if any)
 def list_sources(cfg_list, depends, pkg_list):
     src_list = []
-    LOG.debug(("Looking for data source in: %s,"
-               " via packages %s that matches dependencies %s"),
-              cfg_list, pkg_list, depends)
+    LOG.debug(
+        "Looking for data source in: %s,"
+        " via packages %s that matches dependencies %s",
+        cfg_list,
+        pkg_list,
+        depends,
+    )
     for ds_name in cfg_list:
         if not ds_name.startswith(DS_PREFIX):
-            ds_name = '%s%s' % (DS_PREFIX, ds_name)
-        m_locs, _looked_locs = importer.find_module(ds_name,
-                                                    pkg_list,
-                                                    ['get_datasource_list'])
+            ds_name = "%s%s" % (DS_PREFIX, ds_name)
+        m_locs, _looked_locs = importer.find_module(
+            ds_name, pkg_list, ["get_datasource_list"]
+        )
         for m_loc in m_locs:
             mod = importer.import_module(m_loc)
             lister = getattr(mod, "get_datasource_list")
@@ -879,7 +939,7 @@ def list_sources(cfg_list, depends, pkg_list):
     return src_list
 
 
-def instance_id_matches_system_uuid(instance_id, field='system-uuid'):
+def instance_id_matches_system_uuid(instance_id, field="system-uuid"):
     # quickly (local check only) if self.instance_id is still valid
     # we check kernel command line or files.
     if not instance_id:
@@ -929,8 +989,7 @@ def convert_vendordata(data, recurse=True):
         return copy.deepcopy(data)
     if isinstance(data, dict):
         if recurse is True:
-            return convert_vendordata(data.get('cloud-init'),
-                                      recurse=False)
+            return convert_vendordata(data.get("cloud-init"), recurse=False)
         raise ValueError("vendordata['cloud-init'] cannot be dict")
     raise ValueError("Unknown data type for vendordata: %s" % type(data))
 
diff --git a/cloudinit/sources/helpers/azure.py b/cloudinit/sources/helpers/azure.py
index a5ac1d57..50058fe0 100755
--- a/cloudinit/sources/helpers/azure.py
+++ b/cloudinit/sources/helpers/azure.py
@@ -6,27 +6,28 @@ import os
 import re
 import socket
 import struct
-import time
 import textwrap
+import time
 import zlib
-from errno import ENOENT
-
-from cloudinit.settings import CFG_BUILTIN
-from cloudinit.net import dhcp
-from cloudinit import stages
-from cloudinit import temp_utils
 from contextlib import contextmanager
+from datetime import datetime
+from errno import ENOENT
 from xml.etree import ElementTree
 from xml.sax.saxutils import escape
 
-from cloudinit import subp
-from cloudinit import url_helper
-from cloudinit import util
-from cloudinit import version
-from cloudinit import distros
-from cloudinit.reporting import events
+from cloudinit import (
+    distros,
+    stages,
+    subp,
+    temp_utils,
+    url_helper,
+    util,
+    version,
+)
+from cloudinit.net import dhcp
 from cloudinit.net.dhcp import EphemeralDHCPv4
-from datetime import datetime
+from cloudinit.reporting import events
+from cloudinit.settings import CFG_BUILTIN
 
 LOG = logging.getLogger(__name__)
 
@@ -34,10 +35,10 @@ LOG = logging.getLogger(__name__)
 # value is applied if the endpoint can't be found within a lease file
 DEFAULT_WIRESERVER_ENDPOINT = "a8:3f:81:10"
 
-BOOT_EVENT_TYPE = 'boot-telemetry'
-SYSTEMINFO_EVENT_TYPE = 'system-info'
-DIAGNOSTIC_EVENT_TYPE = 'diagnostic'
-COMPRESSED_EVENT_TYPE = 'compressed'
+BOOT_EVENT_TYPE = "boot-telemetry"
+SYSTEMINFO_EVENT_TYPE = "system-info"
+DIAGNOSTIC_EVENT_TYPE = "diagnostic"
+COMPRESSED_EVENT_TYPE = "compressed"
 # Maximum number of bytes of the cloud-init.log file that can be dumped to KVP
 # at once. This number is based on the analysis done on a large sample of
 # cloud-init.log files where the P95 of the file sizes was 537KB and the time
@@ -45,25 +46,29 @@ COMPRESSED_EVENT_TYPE = 'compressed'
 MAX_LOG_TO_KVP_LENGTH = 512000
 # File to store the last byte of cloud-init.log that was pushed to KVP. This
 # file will be deleted with every VM reboot.
-LOG_PUSHED_TO_KVP_INDEX_FILE = '/run/cloud-init/log_pushed_to_kvp_index'
+LOG_PUSHED_TO_KVP_INDEX_FILE = "/run/cloud-init/log_pushed_to_kvp_index"
 azure_ds_reporter = events.ReportEventStack(
     name="azure-ds",
     description="initialize reporter for azure ds",
-    reporting_enabled=True)
+    reporting_enabled=True,
+)
 
 DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE = (
-    'The VM encountered an error during deployment. '
-    'Please visit https://aka.ms/linuxprovisioningerror '
-    'for more information on remediation.')
+    "The VM encountered an error during deployment. "
+    "Please visit https://aka.ms/linuxprovisioningerror "
+    "for more information on remediation."
+)
 
 
 def azure_ds_telemetry_reporter(func):
     def impl(*args, **kwargs):
         with events.ReportEventStack(
-                name=func.__name__,
-                description=func.__name__,
-                parent=azure_ds_reporter):
+            name=func.__name__,
+            description=func.__name__,
+            parent=azure_ds_reporter,
+        ):
             return func(*args, **kwargs)
+
     return impl
 
 
@@ -79,16 +84,16 @@ def is_byte_swapped(previous_id, current_id):
     def swap_bytestring(s, width=2):
         dd = [byte for byte in textwrap.wrap(s, 2)]
         dd.reverse()
-        return ''.join(dd)
+        return "".join(dd)
 
-    parts = current_id.split('-')
-    swapped_id = '-'.join(
+    parts = current_id.split("-")
+    swapped_id = "-".join(
         [
             swap_bytestring(parts[0]),
             swap_bytestring(parts[1]),
             swap_bytestring(parts[2]),
             parts[3],
-            parts[4]
+            parts[4],
         ]
     )
 
@@ -98,31 +103,29 @@ def is_byte_swapped(previous_id, current_id):
 @azure_ds_telemetry_reporter
 def get_boot_telemetry():
     """Report timestamps related to kernel initialization and systemd
-       activation of cloud-init"""
+    activation of cloud-init"""
     if not distros.uses_systemd():
-        raise RuntimeError(
-            "distro not using systemd, skipping boot telemetry")
+        raise RuntimeError("distro not using systemd, skipping boot telemetry")
 
     LOG.debug("Collecting boot telemetry")
     try:
         kernel_start = float(time.time()) - float(util.uptime())
     except ValueError as e:
-        raise RuntimeError(
-            "Failed to determine kernel start timestamp"
-        ) from e
+        raise RuntimeError("Failed to determine kernel start timestamp") from e
 
     try:
-        out, _ = subp.subp(['/bin/systemctl',
-                            'show', '-p',
-                            'UserspaceTimestampMonotonic'],
-                           capture=True)
+        out, _ = subp.subp(
+            ["/bin/systemctl", "show", "-p", "UserspaceTimestampMonotonic"],
+            capture=True,
+        )
         tsm = None
-        if out and '=' in out:
+        if out and "=" in out:
             tsm = out.split("=")[1]
 
         if not tsm:
-            raise RuntimeError("Failed to parse "
-                               "UserspaceTimestampMonotonic from systemd")
+            raise RuntimeError(
+                "Failed to parse UserspaceTimestampMonotonic from systemd"
+            )
 
         user_start = kernel_start + (float(tsm) / 1000000)
     except subp.ProcessExecutionError as e:
@@ -135,16 +138,23 @@ def get_boot_telemetry():
         ) from e
 
     try:
-        out, _ = subp.subp(['/bin/systemctl', 'show',
-                            'cloud-init-local', '-p',
-                            'InactiveExitTimestampMonotonic'],
-                           capture=True)
+        out, _ = subp.subp(
+            [
+                "/bin/systemctl",
+                "show",
+                "cloud-init-local",
+                "-p",
+                "InactiveExitTimestampMonotonic",
+            ],
+            capture=True,
+        )
         tsm = None
-        if out and '=' in out:
+        if out and "=" in out:
             tsm = out.split("=")[1]
         if not tsm:
-            raise RuntimeError("Failed to parse "
-                               "InactiveExitTimestampMonotonic from systemd")
+            raise RuntimeError(
+                "Failed to parse InactiveExitTimestampMonotonic from systemd"
+            )
 
         cloudinit_activation = kernel_start + (float(tsm) / 1000000)
     except subp.ProcessExecutionError as e:
@@ -158,12 +168,16 @@ def get_boot_telemetry():
         ) from e
 
     evt = events.ReportingEvent(
-        BOOT_EVENT_TYPE, 'boot-telemetry',
-        "kernel_start=%s user_start=%s cloudinit_activation=%s" %
-        (datetime.utcfromtimestamp(kernel_start).isoformat() + 'Z',
-         datetime.utcfromtimestamp(user_start).isoformat() + 'Z',
-         datetime.utcfromtimestamp(cloudinit_activation).isoformat() + 'Z'),
-        events.DEFAULT_EVENT_ORIGIN)
+        BOOT_EVENT_TYPE,
+        "boot-telemetry",
+        "kernel_start=%s user_start=%s cloudinit_activation=%s"
+        % (
+            datetime.utcfromtimestamp(kernel_start).isoformat() + "Z",
+            datetime.utcfromtimestamp(user_start).isoformat() + "Z",
+            datetime.utcfromtimestamp(cloudinit_activation).isoformat() + "Z",
+        ),
+        events.DEFAULT_EVENT_ORIGIN,
+    )
     events.report_event(evt)
 
     # return the event for unit testing purpose
@@ -175,13 +189,22 @@ def get_system_info():
     """Collect and report system information"""
     info = util.system_info()
     evt = events.ReportingEvent(
-        SYSTEMINFO_EVENT_TYPE, 'system information',
+        SYSTEMINFO_EVENT_TYPE,
+        "system information",
         "cloudinit_version=%s, kernel_version=%s, variant=%s, "
         "distro_name=%s, distro_version=%s, flavor=%s, "
-        "python_version=%s" %
-        (version.version_string(), info['release'], info['variant'],
-         info['dist'][0], info['dist'][1], info['dist'][2],
-         info['python']), events.DEFAULT_EVENT_ORIGIN)
+        "python_version=%s"
+        % (
+            version.version_string(),
+            info["release"],
+            info["variant"],
+            info["dist"][0],
+            info["dist"][1],
+            info["dist"][2],
+            info["python"],
+        ),
+        events.DEFAULT_EVENT_ORIGIN,
+    )
     events.report_event(evt)
 
     # return the event for unit testing purpose
@@ -189,13 +212,17 @@ def get_system_info():
 
 
 def report_diagnostic_event(
-        msg: str, *, logger_func=None) -> events.ReportingEvent:
+    msg: str, *, logger_func=None
+) -> events.ReportingEvent:
     """Report a diagnostic event"""
     if callable(logger_func):
         logger_func(msg)
     evt = events.ReportingEvent(
-        DIAGNOSTIC_EVENT_TYPE, 'diagnostic message',
-        msg, events.DEFAULT_EVENT_ORIGIN)
+        DIAGNOSTIC_EVENT_TYPE,
+        "diagnostic message",
+        msg,
+        events.DEFAULT_EVENT_ORIGIN,
+    )
     events.report_event(evt, excluded_handler_types={"log"})
 
     # return the event for unit testing purpose
@@ -205,21 +232,26 @@ def report_diagnostic_event(
 def report_compressed_event(event_name, event_content):
     """Report a compressed event"""
     compressed_data = base64.encodebytes(zlib.compress(event_content))
-    event_data = {"encoding": "gz+b64",
-                  "data": compressed_data.decode('ascii')}
+    event_data = {
+        "encoding": "gz+b64",
+        "data": compressed_data.decode("ascii"),
+    }
     evt = events.ReportingEvent(
-        COMPRESSED_EVENT_TYPE, event_name,
+        COMPRESSED_EVENT_TYPE,
+        event_name,
         json.dumps(event_data),
-        events.DEFAULT_EVENT_ORIGIN)
-    events.report_event(evt,
-                        excluded_handler_types={"log", "print", "webhook"})
+        events.DEFAULT_EVENT_ORIGIN,
+    )
+    events.report_event(
+        evt, excluded_handler_types={"log", "print", "webhook"}
+    )
 
     # return the event for unit testing purpose
     return evt
 
 
 @azure_ds_telemetry_reporter
-def push_log_to_kvp(file_name=CFG_BUILTIN['def_log_file']):
+def push_log_to_kvp(file_name=CFG_BUILTIN["def_log_file"]):
     """Push a portion of cloud-init.log file or the whole file to KVP
     based on the file size.
     The first time this function is called after VM boot, It will push the last
@@ -237,23 +269,26 @@ def push_log_to_kvp(file_name=CFG_BUILTIN['def_log_file']):
             report_diagnostic_event(
                 "Dumping last {0} bytes of cloud-init.log file to KVP starting"
                 " from index: {1}".format(f.tell() - seek_index, seek_index),
-                logger_func=LOG.debug)
+                logger_func=LOG.debug,
+            )
             f.seek(seek_index, os.SEEK_SET)
             report_compressed_event("cloud-init.log", f.read())
             util.write_file(LOG_PUSHED_TO_KVP_INDEX_FILE, str(f.tell()))
     except Exception as ex:
         report_diagnostic_event(
             "Exception when dumping log file: %s" % repr(ex),
-            logger_func=LOG.warning)
+            logger_func=LOG.warning,
+        )
 
     LOG.debug("Dumping dmesg log to KVP")
     try:
-        out, _ = subp.subp(['dmesg'], decode=False, capture=True)
+        out, _ = subp.subp(["dmesg"], decode=False, capture=True)
         report_compressed_event("dmesg", out)
     except Exception as ex:
         report_diagnostic_event(
             "Exception when dumping dmesg log: %s" % repr(ex),
-            logger_func=LOG.warning)
+            logger_func=LOG.warning,
+        )
 
 
 @azure_ds_telemetry_reporter
@@ -263,16 +298,20 @@ def get_last_log_byte_pushed_to_kvp_index():
             return int(f.read())
     except IOError as e:
         if e.errno != ENOENT:
-            report_diagnostic_event("Reading LOG_PUSHED_TO_KVP_INDEX_FILE"
-                                    " failed: %s." % repr(e),
-                                    logger_func=LOG.warning)
+            report_diagnostic_event(
+                "Reading LOG_PUSHED_TO_KVP_INDEX_FILE failed: %s." % repr(e),
+                logger_func=LOG.warning,
+            )
     except ValueError as e:
-        report_diagnostic_event("Invalid value in LOG_PUSHED_TO_KVP_INDEX_FILE"
-                                ": %s." % repr(e),
-                                logger_func=LOG.warning)
+        report_diagnostic_event(
+            "Invalid value in LOG_PUSHED_TO_KVP_INDEX_FILE: %s." % repr(e),
+            logger_func=LOG.warning,
+        )
     except Exception as e:
-        report_diagnostic_event("Failed to get the last log byte pushed to KVP"
-                                ": %s." % repr(e), logger_func=LOG.warning)
+        report_diagnostic_event(
+            "Failed to get the last log byte pushed to KVP: %s." % repr(e),
+            logger_func=LOG.warning,
+        )
     return 0
 
 
@@ -306,28 +345,31 @@ def http_with_retries(url, **kwargs) -> str:
     sleep_duration_between_retries = 5
     periodic_logging_attempts = 12
 
-    if 'timeout' not in kwargs:
-        kwargs['timeout'] = default_readurl_timeout
+    if "timeout" not in kwargs:
+        kwargs["timeout"] = default_readurl_timeout
 
     # remove kwargs that cause url_helper.readurl to retry,
     # since we are already implementing our own retry logic.
-    if kwargs.pop('retries', None):
+    if kwargs.pop("retries", None):
         LOG.warning(
-            'Ignoring retries kwarg passed in for '
-            'communication with Azure endpoint.')
-    if kwargs.pop('infinite', None):
+            "Ignoring retries kwarg passed in for "
+            "communication with Azure endpoint."
+        )
+    if kwargs.pop("infinite", None):
         LOG.warning(
-            'Ignoring infinite kwarg passed in for communication '
-            'with Azure endpoint.')
+            "Ignoring infinite kwarg passed in for communication "
+            "with Azure endpoint."
+        )
 
     for attempt in range(1, max_readurl_attempts + 1):
         try:
             ret = url_helper.readurl(url, **kwargs)
 
             report_diagnostic_event(
-                'Successful HTTP request with Azure endpoint %s after '
-                '%d attempts' % (url, attempt),
-                logger_func=LOG.debug)
+                "Successful HTTP request with Azure endpoint %s after "
+                "%d attempts" % (url, attempt),
+                logger_func=LOG.debug,
+            )
 
             return ret
 
@@ -335,20 +377,20 @@ def http_with_retries(url, **kwargs) -> str:
             exc = e
             if attempt % periodic_logging_attempts == 0:
                 report_diagnostic_event(
-                    'Failed HTTP request with Azure endpoint %s during '
-                    'attempt %d with exception: %s' %
-                    (url, attempt, e),
-                    logger_func=LOG.debug)
+                    "Failed HTTP request with Azure endpoint %s during "
+                    "attempt %d with exception: %s" % (url, attempt, e),
+                    logger_func=LOG.debug,
+                )
             time.sleep(sleep_duration_between_retries)
 
     raise exc
 
 
 def build_minimal_ovf(
-        username: str,
-        hostname: str,
-        disableSshPwd: str) -> bytes:
-    OVF_ENV_TEMPLATE = textwrap.dedent('''\
+    username: str, hostname: str, disableSshPwd: str
+) -> bytes:
+    OVF_ENV_TEMPLATE = textwrap.dedent(
+        """\
         <ns0:Environment xmlns:ns0="http://schemas.dmtf.org/ovf/environment/1"
          xmlns:ns1="http://schemas.microsoft.com/windowsazure"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
@@ -370,19 +412,19 @@ def build_minimal_ovf(
             </ns1:PlatformSettings>
           </ns1:PlatformSettingsSection>
         </ns0:Environment>
-        ''')
+        """
+    )
     ret = OVF_ENV_TEMPLATE.format(
-        username=username,
-        hostname=hostname,
-        disableSshPwd=disableSshPwd)
-    return ret.encode('utf-8')
+        username=username, hostname=hostname, disableSshPwd=disableSshPwd
+    )
+    return ret.encode("utf-8")
 
 
 class AzureEndpointHttpClient:
 
     headers = {
-        'x-ms-agent-name': 'WALinuxAgent',
-        'x-ms-version': '2012-11-30',
+        "x-ms-agent-name": "WALinuxAgent",
+        "x-ms-version": "2012-11-30",
     }
 
     def __init__(self, certificate):
@@ -403,8 +445,7 @@ class AzureEndpointHttpClient:
         if extra_headers is not None:
             headers = self.headers.copy()
             headers.update(extra_headers)
-        return http_with_retries(
-            url, data=data, headers=headers)
+        return http_with_retries(url, data=data, headers=headers)
 
 
 class InvalidGoalStateXMLException(Exception):
@@ -412,12 +453,12 @@ class InvalidGoalStateXMLException(Exception):
 
 
 class GoalState:
-
     def __init__(
-            self,
-            unparsed_xml: str,
-            azure_endpoint_client: AzureEndpointHttpClient,
-            need_certificate: bool = True) -> None:
+        self,
+        unparsed_xml: str,
+        azure_endpoint_client: AzureEndpointHttpClient,
+        need_certificate: bool = True,
+    ) -> None:
         """Parses a GoalState XML string and returns a GoalState object.
 
         @param unparsed_xml: string representing a GoalState XML.
@@ -431,36 +472,41 @@ class GoalState:
             self.root = ElementTree.fromstring(unparsed_xml)
         except ElementTree.ParseError as e:
             report_diagnostic_event(
-                'Failed to parse GoalState XML: %s' % e,
-                logger_func=LOG.warning)
+                "Failed to parse GoalState XML: %s" % e,
+                logger_func=LOG.warning,
+            )
             raise
 
-        self.container_id = self._text_from_xpath('./Container/ContainerId')
+        self.container_id = self._text_from_xpath("./Container/ContainerId")
         self.instance_id = self._text_from_xpath(
-            './Container/RoleInstanceList/RoleInstance/InstanceId')
-        self.incarnation = self._text_from_xpath('./Incarnation')
+            "./Container/RoleInstanceList/RoleInstance/InstanceId"
+        )
+        self.incarnation = self._text_from_xpath("./Incarnation")
 
         for attr in ("container_id", "instance_id", "incarnation"):
             if getattr(self, attr) is None:
-                msg = 'Missing %s in GoalState XML' % attr
+                msg = "Missing %s in GoalState XML" % attr
                 report_diagnostic_event(msg, logger_func=LOG.warning)
                 raise InvalidGoalStateXMLException(msg)
 
         self.certificates_xml = None
         url = self._text_from_xpath(
-            './Container/RoleInstanceList/RoleInstance'
-            '/Configuration/Certificates')
+            "./Container/RoleInstanceList/RoleInstance"
+            "/Configuration/Certificates"
+        )
         if url is not None and need_certificate:
             with events.ReportEventStack(
-                    name="get-certificates-xml",
-                    description="get certificates xml",
-                    parent=azure_ds_reporter):
-                self.certificates_xml = \
-                    self.azure_endpoint_client.get(
-                        url, secure=True).contents
+                name="get-certificates-xml",
+                description="get certificates xml",
+                parent=azure_ds_reporter,
+            ):
+                self.certificates_xml = self.azure_endpoint_client.get(
+                    url, secure=True
+                ).contents
                 if self.certificates_xml is None:
                     raise InvalidGoalStateXMLException(
-                        'Azure endpoint returned empty certificates xml.')
+                        "Azure endpoint returned empty certificates xml."
+                    )
 
     def _text_from_xpath(self, xpath):
         element = self.root.find(xpath)
@@ -472,8 +518,8 @@ class GoalState:
 class OpenSSLManager:
 
     certificate_names = {
-        'private_key': 'TransportPrivate.pem',
-        'certificate': 'TransportCert.pem',
+        "private_key": "TransportPrivate.pem",
+        "certificate": "TransportCert.pem",
     }
 
     def __init__(self):
@@ -494,35 +540,47 @@ class OpenSSLManager:
 
     @azure_ds_telemetry_reporter
     def generate_certificate(self):
-        LOG.debug('Generating certificate for communication with fabric...')
+        LOG.debug("Generating certificate for communication with fabric...")
         if self.certificate is not None:
-            LOG.debug('Certificate already generated.')
+            LOG.debug("Certificate already generated.")
             return
         with cd(self.tmpdir):
-            subp.subp([
-                'openssl', 'req', '-x509', '-nodes', '-subj',
-                '/CN=LinuxTransport', '-days', '32768', '-newkey', 'rsa:2048',
-                '-keyout', self.certificate_names['private_key'],
-                '-out', self.certificate_names['certificate'],
-            ])
-            certificate = ''
-            for line in open(self.certificate_names['certificate']):
+            subp.subp(
+                [
+                    "openssl",
+                    "req",
+                    "-x509",
+                    "-nodes",
+                    "-subj",
+                    "/CN=LinuxTransport",
+                    "-days",
+                    "32768",
+                    "-newkey",
+                    "rsa:2048",
+                    "-keyout",
+                    self.certificate_names["private_key"],
+                    "-out",
+                    self.certificate_names["certificate"],
+                ]
+            )
+            certificate = ""
+            for line in open(self.certificate_names["certificate"]):
                 if "CERTIFICATE" not in line:
                     certificate += line.rstrip()
             self.certificate = certificate
-        LOG.debug('New certificate generated.')
+        LOG.debug("New certificate generated.")
 
     @staticmethod
     @azure_ds_telemetry_reporter
     def _run_x509_action(action, cert):
-        cmd = ['openssl', 'x509', '-noout', action]
+        cmd = ["openssl", "x509", "-noout", action]
         result, _ = subp.subp(cmd, data=cert)
         return result
 
     @azure_ds_telemetry_reporter
     def _get_ssh_key_from_cert(self, certificate):
-        pub_key = self._run_x509_action('-pubkey', certificate)
-        keygen_cmd = ['ssh-keygen', '-i', '-m', 'PKCS8', '-f', '/dev/stdin']
+        pub_key = self._run_x509_action("-pubkey", certificate)
+        keygen_cmd = ["ssh-keygen", "-i", "-m", "PKCS8", "-f", "/dev/stdin"]
         ssh_key, _ = subp.subp(keygen_cmd, data=pub_key)
         return ssh_key
 
@@ -535,48 +593,50 @@ class OpenSSLManager:
         Azure control plane passes that fingerprint as so:
         '073E19D14D1C799224C6A0FD8DDAB6A8BF27D473'
         """
-        raw_fp = self._run_x509_action('-fingerprint', certificate)
-        eq = raw_fp.find('=')
-        octets = raw_fp[eq+1:-1].split(':')
-        return ''.join(octets)
+        raw_fp = self._run_x509_action("-fingerprint", certificate)
+        eq = raw_fp.find("=")
+        octets = raw_fp[eq + 1 : -1].split(":")
+        return "".join(octets)
 
     @azure_ds_telemetry_reporter
     def _decrypt_certs_from_xml(self, certificates_xml):
         """Decrypt the certificates XML document using the our private key;
-           return the list of certs and private keys contained in the doc.
+        return the list of certs and private keys contained in the doc.
         """
-        tag = ElementTree.fromstring(certificates_xml).find('.//Data')
+        tag = ElementTree.fromstring(certificates_xml).find(".//Data")
         certificates_content = tag.text
         lines = [
-            b'MIME-Version: 1.0',
+            b"MIME-Version: 1.0",
             b'Content-Disposition: attachment; filename="Certificates.p7m"',
             b'Content-Type: application/x-pkcs7-mime; name="Certificates.p7m"',
-            b'Content-Transfer-Encoding: base64',
-            b'',
-            certificates_content.encode('utf-8'),
+            b"Content-Transfer-Encoding: base64",
+            b"",
+            certificates_content.encode("utf-8"),
         ]
         with cd(self.tmpdir):
             out, _ = subp.subp(
-                'openssl cms -decrypt -in /dev/stdin -inkey'
-                ' {private_key} -recip {certificate} | openssl pkcs12 -nodes'
-                ' -password pass:'.format(**self.certificate_names),
-                shell=True, data=b'\n'.join(lines))
+                "openssl cms -decrypt -in /dev/stdin -inkey"
+                " {private_key} -recip {certificate} | openssl pkcs12 -nodes"
+                " -password pass:".format(**self.certificate_names),
+                shell=True,
+                data=b"\n".join(lines),
+            )
         return out
 
     @azure_ds_telemetry_reporter
     def parse_certificates(self, certificates_xml):
         """Given the Certificates XML document, return a dictionary of
-           fingerprints and associated SSH keys derived from the certs."""
+        fingerprints and associated SSH keys derived from the certs."""
         out = self._decrypt_certs_from_xml(certificates_xml)
         current = []
         keys = {}
         for line in out.splitlines():
             current.append(line)
-            if re.match(r'[-]+END .*?KEY[-]+$', line):
+            if re.match(r"[-]+END .*?KEY[-]+$", line):
                 # ignore private_keys
                 current = []
-            elif re.match(r'[-]+END .*?CERTIFICATE[-]+$', line):
-                certificate = '\n'.join(current)
+            elif re.match(r"[-]+END .*?CERTIFICATE[-]+$", line):
+                certificate = "\n".join(current)
                 ssh_key = self._get_ssh_key_from_cert(certificate)
                 fingerprint = self._get_fingerprint_from_cert(certificate)
                 keys[fingerprint] = ssh_key
@@ -586,7 +646,8 @@ class OpenSSLManager:
 
 class GoalStateHealthReporter:
 
-    HEALTH_REPORT_XML_TEMPLATE = textwrap.dedent('''\
+    HEALTH_REPORT_XML_TEMPLATE = textwrap.dedent(
+        """\
         <?xml version="1.0" encoding="utf-8"?>
         <Health xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns:xsd="http://www.w3.org/2001/XMLSchema">
@@ -604,25 +665,30 @@ class GoalStateHealthReporter:
             </RoleInstanceList>
           </Container>
         </Health>
-        ''')
+        """
+    )
 
-    HEALTH_DETAIL_SUBSECTION_XML_TEMPLATE = textwrap.dedent('''\
+    HEALTH_DETAIL_SUBSECTION_XML_TEMPLATE = textwrap.dedent(
+        """\
         <Details>
           <SubStatus>{health_substatus}</SubStatus>
           <Description>{health_description}</Description>
         </Details>
-        ''')
+        """
+    )
 
-    PROVISIONING_SUCCESS_STATUS = 'Ready'
-    PROVISIONING_NOT_READY_STATUS = 'NotReady'
-    PROVISIONING_FAILURE_SUBSTATUS = 'ProvisioningFailed'
+    PROVISIONING_SUCCESS_STATUS = "Ready"
+    PROVISIONING_NOT_READY_STATUS = "NotReady"
+    PROVISIONING_FAILURE_SUBSTATUS = "ProvisioningFailed"
 
     HEALTH_REPORT_DESCRIPTION_TRIM_LEN = 512
 
     def __init__(
-            self, goal_state: GoalState,
-            azure_endpoint_client: AzureEndpointHttpClient,
-            endpoint: str) -> None:
+        self,
+        goal_state: GoalState,
+        azure_endpoint_client: AzureEndpointHttpClient,
+        endpoint: str,
+    ) -> None:
         """Creates instance that will report provisioning status to an endpoint
 
         @param goal_state: An instance of class GoalState that contains
@@ -644,17 +710,19 @@ class GoalStateHealthReporter:
             incarnation=self._goal_state.incarnation,
             container_id=self._goal_state.container_id,
             instance_id=self._goal_state.instance_id,
-            status=self.PROVISIONING_SUCCESS_STATUS)
-        LOG.debug('Reporting ready to Azure fabric.')
+            status=self.PROVISIONING_SUCCESS_STATUS,
+        )
+        LOG.debug("Reporting ready to Azure fabric.")
         try:
             self._post_health_report(document=document)
         except Exception as e:
             report_diagnostic_event(
                 "exception while reporting ready: %s" % e,
-                logger_func=LOG.error)
+                logger_func=LOG.error,
+            )
             raise
 
-        LOG.info('Reported ready to Azure fabric.')
+        LOG.info("Reported ready to Azure fabric.")
 
     @azure_ds_telemetry_reporter
     def send_failure_signal(self, description: str) -> None:
@@ -664,7 +732,8 @@ class GoalStateHealthReporter:
             instance_id=self._goal_state.instance_id,
             status=self.PROVISIONING_NOT_READY_STATUS,
             substatus=self.PROVISIONING_FAILURE_SUBSTATUS,
-            description=description)
+            description=description,
+        )
         try:
             self._post_health_report(document=document)
         except Exception as e:
@@ -672,24 +741,33 @@ class GoalStateHealthReporter:
             report_diagnostic_event(msg, logger_func=LOG.error)
             raise
 
-        LOG.warning('Reported failure to Azure fabric.')
+        LOG.warning("Reported failure to Azure fabric.")
 
     def build_report(
-            self, incarnation: str, container_id: str, instance_id: str,
-            status: str, substatus=None, description=None) -> str:
-        health_detail = ''
+        self,
+        incarnation: str,
+        container_id: str,
+        instance_id: str,
+        status: str,
+        substatus=None,
+        description=None,
+    ) -> str:
+        health_detail = ""
         if substatus is not None:
             health_detail = self.HEALTH_DETAIL_SUBSECTION_XML_TEMPLATE.format(
                 health_substatus=escape(substatus),
                 health_description=escape(
-                    description[:self.HEALTH_REPORT_DESCRIPTION_TRIM_LEN]))
+                    description[: self.HEALTH_REPORT_DESCRIPTION_TRIM_LEN]
+                ),
+            )
 
         health_report = self.HEALTH_REPORT_XML_TEMPLATE.format(
             incarnation=escape(str(incarnation)),
             container_id=escape(container_id),
             instance_id=escape(instance_id),
             health_status=escape(status),
-            health_detail_subsection=health_detail)
+            health_detail_subsection=health_detail,
+        )
 
         return health_report
 
@@ -717,20 +795,22 @@ class GoalStateHealthReporter:
         # reporting handler that writes to the special KVP files.
         time.sleep(0)
 
-        LOG.debug('Sending health report to Azure fabric.')
+        LOG.debug("Sending health report to Azure fabric.")
         url = "http://{}/machine?comp=health".format(self._endpoint)
         self._azure_endpoint_client.post(
             url,
             data=document,
-            extra_headers={'Content-Type': 'text/xml; charset=utf-8'})
-        LOG.debug('Successfully sent health report to Azure fabric')
+            extra_headers={"Content-Type": "text/xml; charset=utf-8"},
+        )
+        LOG.debug("Successfully sent health report to Azure fabric")
 
 
 class WALinuxAgentShim:
-
     def __init__(self, fallback_lease_file=None, dhcp_options=None):
-        LOG.debug('WALinuxAgentShim instantiated, fallback_lease_file=%s',
-                  fallback_lease_file)
+        LOG.debug(
+            "WALinuxAgentShim instantiated, fallback_lease_file=%s",
+            fallback_lease_file,
+        )
         self.dhcpoptions = dhcp_options
         self._endpoint = None
         self.openssl_manager = None
@@ -749,30 +829,33 @@ class WALinuxAgentShim:
     @property
     def endpoint(self):
         if self._endpoint is None:
-            self._endpoint = self.find_endpoint(self.lease_file,
-                                                self.dhcpoptions)
+            self._endpoint = self.find_endpoint(
+                self.lease_file, self.dhcpoptions
+            )
         return self._endpoint
 
     @staticmethod
     def get_ip_from_lease_value(fallback_lease_value):
-        unescaped_value = fallback_lease_value.replace('\\', '')
+        unescaped_value = fallback_lease_value.replace("\\", "")
         if len(unescaped_value) > 4:
-            hex_string = ''
-            for hex_pair in unescaped_value.split(':'):
+            hex_string = ""
+            for hex_pair in unescaped_value.split(":"):
                 if len(hex_pair) == 1:
-                    hex_pair = '0' + hex_pair
+                    hex_pair = "0" + hex_pair
                 hex_string += hex_pair
             packed_bytes = struct.pack(
-                '>L', int(hex_string.replace(':', ''), 16))
+                ">L", int(hex_string.replace(":", ""), 16)
+            )
         else:
-            packed_bytes = unescaped_value.encode('utf-8')
+            packed_bytes = unescaped_value.encode("utf-8")
         return socket.inet_ntoa(packed_bytes)
 
     @staticmethod
     @azure_ds_telemetry_reporter
     def _networkd_get_value_from_leases(leases_d=None):
         return dhcp.networkd_get_option_from_leases(
-            'OPTION_245', leases_d=leases_d)
+            "OPTION_245", leases_d=leases_d
+        )
 
     @staticmethod
     @azure_ds_telemetry_reporter
@@ -790,7 +873,7 @@ class WALinuxAgentShim:
             if option_name in line:
                 # Example line from Ubuntu
                 # option unknown-245 a8:3f:81:10;
-                leases.append(line.strip(' ').split(' ', 2)[-1].strip(';\n"'))
+                leases.append(line.strip(" ").split(" ", 2)[-1].strip(';\n"'))
         # Return the "most recent" one in the list
         if len(leases) < 1:
             return None
@@ -805,15 +888,16 @@ class WALinuxAgentShim:
         if not os.path.exists(hooks_dir):
             LOG.debug("%s not found.", hooks_dir)
             return None
-        hook_files = [os.path.join(hooks_dir, x)
-                      for x in os.listdir(hooks_dir)]
+        hook_files = [
+            os.path.join(hooks_dir, x) for x in os.listdir(hooks_dir)
+        ]
         for hook_file in hook_files:
             try:
-                name = os.path.basename(hook_file).replace('.json', '')
+                name = os.path.basename(hook_file).replace(".json", "")
                 dhcp_options[name] = json.loads(util.load_file((hook_file)))
             except ValueError as e:
                 raise ValueError(
-                    '{_file} is not valid JSON data'.format(_file=hook_file)
+                    "{_file} is not valid JSON data".format(_file=hook_file)
                 ) from e
         return dhcp_options
 
@@ -825,7 +909,7 @@ class WALinuxAgentShim:
         # the MS endpoint server is given to us as DHPC option 245
         _value = None
         for interface in dhcp_options:
-            _value = dhcp_options[interface].get('unknown_245', None)
+            _value = dhcp_options[interface].get("unknown_245", None)
             if _value is not None:
                 LOG.debug("Endpoint server found in dhclient options")
                 break
@@ -855,63 +939,73 @@ class WALinuxAgentShim:
             LOG.debug("Using Azure Endpoint from dhcp options")
         if value is None:
             report_diagnostic_event(
-                'No Azure endpoint from dhcp options. '
-                'Finding Azure endpoint from networkd...',
-                logger_func=LOG.debug)
+                "No Azure endpoint from dhcp options. "
+                "Finding Azure endpoint from networkd...",
+                logger_func=LOG.debug,
+            )
             value = WALinuxAgentShim._networkd_get_value_from_leases()
         if value is None:
             # Option-245 stored in /run/cloud-init/dhclient.hooks/<ifc>.json
             # a dhclient exit hook that calls cloud-init-dhclient-hook
             report_diagnostic_event(
-                'No Azure endpoint from networkd. '
-                'Finding Azure endpoint from hook json...',
-                logger_func=LOG.debug)
+                "No Azure endpoint from networkd. "
+                "Finding Azure endpoint from hook json...",
+                logger_func=LOG.debug,
+            )
             dhcp_options = WALinuxAgentShim._load_dhclient_json()
             value = WALinuxAgentShim._get_value_from_dhcpoptions(dhcp_options)
         if value is None:
             # Fallback and check the leases file if unsuccessful
             report_diagnostic_event(
-                'No Azure endpoint from dhclient logs. '
-                'Unable to find endpoint in dhclient logs. '
-                'Falling back to check lease files',
-                logger_func=LOG.debug)
+                "No Azure endpoint from dhclient logs. "
+                "Unable to find endpoint in dhclient logs. "
+                "Falling back to check lease files",
+                logger_func=LOG.debug,
+            )
             if fallback_lease_file is None:
                 report_diagnostic_event(
-                    'No fallback lease file was specified.',
-                    logger_func=LOG.warning)
+                    "No fallback lease file was specified.",
+                    logger_func=LOG.warning,
+                )
                 value = None
             else:
                 report_diagnostic_event(
-                    'Looking for endpoint in lease file %s'
-                    % fallback_lease_file, logger_func=LOG.debug)
+                    "Looking for endpoint in lease file %s"
+                    % fallback_lease_file,
+                    logger_func=LOG.debug,
+                )
                 value = WALinuxAgentShim._get_value_from_leases_file(
-                    fallback_lease_file)
+                    fallback_lease_file
+                )
         if value is None:
             value = DEFAULT_WIRESERVER_ENDPOINT
             report_diagnostic_event(
-                'No lease found; using default endpoint: %s' % value,
-                logger_func=LOG.warning)
+                "No lease found; using default endpoint: %s" % value,
+                logger_func=LOG.warning,
+            )
 
         endpoint_ip_address = WALinuxAgentShim.get_ip_from_lease_value(value)
         report_diagnostic_event(
-            'Azure endpoint found at %s' % endpoint_ip_address,
-            logger_func=LOG.debug)
+            "Azure endpoint found at %s" % endpoint_ip_address,
+            logger_func=LOG.debug,
+        )
         return endpoint_ip_address
 
     @azure_ds_telemetry_reporter
     def eject_iso(self, iso_dev) -> None:
         try:
             LOG.debug("Ejecting the provisioning iso")
-            subp.subp(['eject', iso_dev])
+            subp.subp(["eject", iso_dev])
         except Exception as e:
             report_diagnostic_event(
                 "Failed ejecting the provisioning iso: %s" % e,
-                logger_func=LOG.debug)
+                logger_func=LOG.debug,
+            )
 
     @azure_ds_telemetry_reporter
-    def register_with_azure_and_fetch_data(self,
-                                           pubkey_info=None,
-                                           iso_dev=None) -> dict:
+    def register_with_azure_and_fetch_data(
+        self, pubkey_info=None, iso_dev=None
+    ) -> dict:
         """Gets the VM's GoalState from Azure, uses the GoalState information
         to report ready/send the ready signal/provisioning complete signal to
         Azure, and then uses pubkey_info to filter and obtain the user's
@@ -928,7 +1022,8 @@ class WALinuxAgentShim:
             http_client_certificate = self.openssl_manager.certificate
         if self.azure_endpoint_client is None:
             self.azure_endpoint_client = AzureEndpointHttpClient(
-                http_client_certificate)
+                http_client_certificate
+            )
         goal_state = self._fetch_goal_state_from_azure(
             need_certificate=http_client_certificate is not None
         )
@@ -936,13 +1031,14 @@ class WALinuxAgentShim:
         if pubkey_info is not None:
             ssh_keys = self._get_user_pubkeys(goal_state, pubkey_info)
         health_reporter = GoalStateHealthReporter(
-            goal_state, self.azure_endpoint_client, self.endpoint)
+            goal_state, self.azure_endpoint_client, self.endpoint
+        )
 
         if iso_dev is not None:
             self.eject_iso(iso_dev)
 
         health_reporter.send_ready_signal()
-        return {'public-keys': ssh_keys}
+        return {"public-keys": ssh_keys}
 
     @azure_ds_telemetry_reporter
     def register_with_azure_and_report_failure(self, description: str) -> None:
@@ -955,13 +1051,14 @@ class WALinuxAgentShim:
             self.azure_endpoint_client = AzureEndpointHttpClient(None)
         goal_state = self._fetch_goal_state_from_azure(need_certificate=False)
         health_reporter = GoalStateHealthReporter(
-            goal_state, self.azure_endpoint_client, self.endpoint)
+            goal_state, self.azure_endpoint_client, self.endpoint
+        )
         health_reporter.send_failure_signal(description=description)
 
     @azure_ds_telemetry_reporter
     def _fetch_goal_state_from_azure(
-            self,
-            need_certificate: bool) -> GoalState:
+        self, need_certificate: bool
+    ) -> GoalState:
         """Fetches the GoalState XML from the Azure endpoint, parses the XML,
         and returns a GoalState object.
 
@@ -970,8 +1067,7 @@ class WALinuxAgentShim:
         """
         unparsed_goal_state_xml = self._get_raw_goal_state_xml_from_azure()
         return self._parse_raw_goal_state_xml(
-            unparsed_goal_state_xml,
-            need_certificate
+            unparsed_goal_state_xml, need_certificate
         )
 
     @azure_ds_telemetry_reporter
@@ -982,27 +1078,29 @@ class WALinuxAgentShim:
         @return: GoalState XML string
         """
 
-        LOG.info('Registering with Azure...')
-        url = 'http://{}/machine/?comp=goalstate'.format(self.endpoint)
+        LOG.info("Registering with Azure...")
+        url = "http://{}/machine/?comp=goalstate".format(self.endpoint)
         try:
             with events.ReportEventStack(
-                    name="goalstate-retrieval",
-                    description="retrieve goalstate",
-                    parent=azure_ds_reporter):
+                name="goalstate-retrieval",
+                description="retrieve goalstate",
+                parent=azure_ds_reporter,
+            ):
                 response = self.azure_endpoint_client.get(url)
         except Exception as e:
             report_diagnostic_event(
-                'failed to register with Azure and fetch GoalState XML: %s'
-                % e, logger_func=LOG.warning)
+                "failed to register with Azure and fetch GoalState XML: %s"
+                % e,
+                logger_func=LOG.warning,
+            )
             raise
-        LOG.debug('Successfully fetched GoalState XML.')
+        LOG.debug("Successfully fetched GoalState XML.")
         return response.contents
 
     @azure_ds_telemetry_reporter
     def _parse_raw_goal_state_xml(
-            self,
-            unparsed_goal_state_xml: str,
-            need_certificate: bool) -> GoalState:
+        self, unparsed_goal_state_xml: str, need_certificate: bool
+    ) -> GoalState:
         """Parses a GoalState XML string and returns a GoalState object.
 
         @param unparsed_goal_state_xml: GoalState XML string
@@ -1013,23 +1111,28 @@ class WALinuxAgentShim:
             goal_state = GoalState(
                 unparsed_goal_state_xml,
                 self.azure_endpoint_client,
-                need_certificate
+                need_certificate,
             )
         except Exception as e:
             report_diagnostic_event(
-                'Error processing GoalState XML: %s' % e,
-                logger_func=LOG.warning)
+                "Error processing GoalState XML: %s" % e,
+                logger_func=LOG.warning,
+            )
             raise
-        msg = ', '.join([
-            'GoalState XML container id: %s' % goal_state.container_id,
-            'GoalState XML instance id: %s' % goal_state.instance_id,
-            'GoalState XML incarnation: %s' % goal_state.incarnation])
+        msg = ", ".join(
+            [
+                "GoalState XML container id: %s" % goal_state.container_id,
+                "GoalState XML instance id: %s" % goal_state.instance_id,
+                "GoalState XML incarnation: %s" % goal_state.incarnation,
+            ]
+        )
         report_diagnostic_event(msg, logger_func=LOG.debug)
         return goal_state
 
     @azure_ds_telemetry_reporter
     def _get_user_pubkeys(
-            self, goal_state: GoalState, pubkey_info: list) -> list:
+        self, goal_state: GoalState, pubkey_info: list
+    ) -> list:
         """Gets and filters the VM admin user's authorized pubkeys.
 
         The admin user in this case is the username specified as "admin"
@@ -1057,15 +1160,16 @@ class WALinuxAgentShim:
         """
         ssh_keys = []
         if goal_state.certificates_xml is not None and pubkey_info is not None:
-            LOG.debug('Certificate XML found; parsing out public keys.')
+            LOG.debug("Certificate XML found; parsing out public keys.")
             keys_by_fingerprint = self.openssl_manager.parse_certificates(
-                goal_state.certificates_xml)
+                goal_state.certificates_xml
+            )
             ssh_keys = self._filter_pubkeys(keys_by_fingerprint, pubkey_info)
         return ssh_keys
 
     @staticmethod
     def _filter_pubkeys(keys_by_fingerprint: dict, pubkey_info: list) -> list:
-        """ Filter and return only the user's actual pubkeys.
+        """Filter and return only the user's actual pubkeys.
 
         @param keys_by_fingerprint: pubkey fingerprint -> pubkey value dict
             that was obtained from GoalState Certificates XML. May contain
@@ -1078,71 +1182,84 @@ class WALinuxAgentShim:
         """
         keys = []
         for pubkey in pubkey_info:
-            if 'value' in pubkey and pubkey['value']:
-                keys.append(pubkey['value'])
-            elif 'fingerprint' in pubkey and pubkey['fingerprint']:
-                fingerprint = pubkey['fingerprint']
+            if "value" in pubkey and pubkey["value"]:
+                keys.append(pubkey["value"])
+            elif "fingerprint" in pubkey and pubkey["fingerprint"]:
+                fingerprint = pubkey["fingerprint"]
                 if fingerprint in keys_by_fingerprint:
                     keys.append(keys_by_fingerprint[fingerprint])
                 else:
-                    LOG.warning("ovf-env.xml specified PublicKey fingerprint "
-                                "%s not found in goalstate XML", fingerprint)
+                    LOG.warning(
+                        "ovf-env.xml specified PublicKey fingerprint "
+                        "%s not found in goalstate XML",
+                        fingerprint,
+                    )
             else:
-                LOG.warning("ovf-env.xml specified PublicKey with neither "
-                            "value nor fingerprint: %s", pubkey)
+                LOG.warning(
+                    "ovf-env.xml specified PublicKey with neither "
+                    "value nor fingerprint: %s",
+                    pubkey,
+                )
 
         return keys
 
 
 @azure_ds_telemetry_reporter
-def get_metadata_from_fabric(fallback_lease_file=None, dhcp_opts=None,
-                             pubkey_info=None, iso_dev=None):
-    shim = WALinuxAgentShim(fallback_lease_file=fallback_lease_file,
-                            dhcp_options=dhcp_opts)
+def get_metadata_from_fabric(
+    fallback_lease_file=None, dhcp_opts=None, pubkey_info=None, iso_dev=None
+):
+    shim = WALinuxAgentShim(
+        fallback_lease_file=fallback_lease_file, dhcp_options=dhcp_opts
+    )
     try:
         return shim.register_with_azure_and_fetch_data(
-            pubkey_info=pubkey_info, iso_dev=iso_dev)
+            pubkey_info=pubkey_info, iso_dev=iso_dev
+        )
     finally:
         shim.clean_up()
 
 
 @azure_ds_telemetry_reporter
-def report_failure_to_fabric(fallback_lease_file=None, dhcp_opts=None,
-                             description=None):
-    shim = WALinuxAgentShim(fallback_lease_file=fallback_lease_file,
-                            dhcp_options=dhcp_opts)
+def report_failure_to_fabric(
+    fallback_lease_file=None, dhcp_opts=None, description=None
+):
+    shim = WALinuxAgentShim(
+        fallback_lease_file=fallback_lease_file, dhcp_options=dhcp_opts
+    )
     if not description:
         description = DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE
     try:
-        shim.register_with_azure_and_report_failure(
-            description=description)
+        shim.register_with_azure_and_report_failure(description=description)
     finally:
         shim.clean_up()
 
 
 def dhcp_log_cb(out, err):
     report_diagnostic_event(
-        "dhclient output stream: %s" % out, logger_func=LOG.debug)
+        "dhclient output stream: %s" % out, logger_func=LOG.debug
+    )
     report_diagnostic_event(
-        "dhclient error stream: %s" % err, logger_func=LOG.debug)
+        "dhclient error stream: %s" % err, logger_func=LOG.debug
+    )
 
 
 class EphemeralDHCPv4WithReporting:
     def __init__(self, reporter, nic=None):
         self.reporter = reporter
         self.ephemeralDHCPv4 = EphemeralDHCPv4(
-            iface=nic, dhcp_log_func=dhcp_log_cb)
+            iface=nic, dhcp_log_func=dhcp_log_cb
+        )
 
     def __enter__(self):
         with events.ReportEventStack(
-                name="obtain-dhcp-lease",
-                description="obtain dhcp lease",
-                parent=self.reporter):
+            name="obtain-dhcp-lease",
+            description="obtain dhcp lease",
+            parent=self.reporter,
+        ):
             return self.ephemeralDHCPv4.__enter__()
 
     def __exit__(self, excp_type, excp_value, excp_traceback):
-        self.ephemeralDHCPv4.__exit__(
-            excp_type, excp_value, excp_traceback)
+        self.ephemeralDHCPv4.__exit__(excp_type, excp_value, excp_traceback)
 
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/digitalocean.py b/cloudinit/sources/helpers/digitalocean.py
index f9be4ecb..72515caf 100644
--- a/cloudinit/sources/helpers/digitalocean.py
+++ b/cloudinit/sources/helpers/digitalocean.py
@@ -8,20 +8,18 @@ import random
 from cloudinit import dmi
 from cloudinit import log as logging
 from cloudinit import net as cloudnet
-from cloudinit import url_helper
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, url_helper, util
 
-NIC_MAP = {'public': 'eth0', 'private': 'eth1'}
+NIC_MAP = {"public": "eth0", "private": "eth1"}
 
 LOG = logging.getLogger(__name__)
 
 
 def assign_ipv4_link_local(distro, nic=None):
-    """Bring up NIC using an address using link-local (ip4LL) IPs. On
-       DigitalOcean, the link-local domain is per-droplet routed, so there
-       is no risk of collisions. However, to be more safe, the ip4LL
-       address is random.
+    """Bring up NIC using an address using link-local (ip4LL) IPs.
+    On DigitalOcean, the link-local domain is per-droplet routed, so there
+    is no risk of collisions. However, to be more safe, the ip4LL
+    address is random.
     """
 
     if not nic:
@@ -29,18 +27,22 @@ def assign_ipv4_link_local(distro, nic=None):
         LOG.debug("selected interface '%s' for reading metadata", nic)
 
     if not nic:
-        raise RuntimeError("unable to find interfaces to access the"
-                           "meta-data server. This droplet is broken.")
+        raise RuntimeError(
+            "unable to find interfaces to access the"
+            "meta-data server. This droplet is broken."
+        )
 
-    addr = "169.254.{0}.{1}/16".format(random.randint(1, 168),
-                                       random.randint(0, 255))
+    addr = "169.254.{0}.{1}/16".format(
+        random.randint(1, 168), random.randint(0, 255)
+    )
 
-    ip_addr_cmd = ['ip', 'addr', 'add', addr, 'dev', nic]
-    ip_link_cmd = ['ip', 'link', 'set', 'dev', nic, 'up']
+    ip_addr_cmd = ["ip", "addr", "add", addr, "dev", nic]
+    ip_link_cmd = ["ip", "link", "set", "dev", nic, "up"]
 
-    if not subp.which('ip'):
-        raise RuntimeError("No 'ip' command available to configure ip4LL "
-                           "address")
+    if not subp.which("ip"):
+        raise RuntimeError(
+            "No 'ip' command available to configure ip4LL address"
+        )
 
     try:
         subp.subp(ip_addr_cmd)
@@ -48,8 +50,13 @@ def assign_ipv4_link_local(distro, nic=None):
         subp.subp(ip_link_cmd)
         LOG.debug("brought device '%s' up", nic)
     except Exception:
-        util.logexc(LOG, "ip4LL address assignment of '%s' to '%s' failed."
-                         " Droplet networking will be broken", addr, nic)
+        util.logexc(
+            LOG,
+            "ip4LL address assignment of '%s' to '%s' failed."
+            " Droplet networking will be broken",
+            addr,
+            nic,
+        )
         raise
 
     return nic
@@ -63,21 +70,23 @@ def get_link_local_nic(distro):
     ]
     if not nics:
         return None
-    return min(nics, key=lambda d: cloudnet.read_sys_net_int(d, 'ifindex'))
+    return min(nics, key=lambda d: cloudnet.read_sys_net_int(d, "ifindex"))
 
 
 def del_ipv4_link_local(nic=None):
     """Remove the ip4LL address. While this is not necessary, the ip4LL
-       address is extraneous and confusing to users.
+    address is extraneous and confusing to users.
     """
     if not nic:
-        LOG.debug("no link_local address interface defined, skipping link "
-                  "local address cleanup")
+        LOG.debug(
+            "no link_local address interface defined, skipping link "
+            "local address cleanup"
+        )
         return
 
     LOG.debug("cleaning up ipv4LL address")
 
-    ip_addr_cmd = ['ip', 'addr', 'flush', 'dev', nic]
+    ip_addr_cmd = ["ip", "addr", "flush", "dev", nic]
 
     try:
         subp.subp(ip_addr_cmd)
@@ -89,44 +98,47 @@ def del_ipv4_link_local(nic=None):
 
 def convert_network_configuration(config, dns_servers):
     """Convert the DigitalOcean Network description into Cloud-init's netconfig
-       format.
-
-       Example JSON:
-        {'public': [
-              {'mac': '04:01:58:27:7f:01',
-               'ipv4': {'gateway': '45.55.32.1',
-                        'netmask': '255.255.224.0',
-                        'ip_address': '45.55.50.93'},
-               'anchor_ipv4': {
-                        'gateway': '10.17.0.1',
-                        'netmask': '255.255.0.0',
-                        'ip_address': '10.17.0.9'},
-               'type': 'public',
-               'ipv6': {'gateway': '....',
-                        'ip_address': '....',
-                        'cidr': 64}}
-           ],
-          'private': [
-              {'mac': '04:01:58:27:7f:02',
-               'ipv4': {'gateway': '10.132.0.1',
-                        'netmask': '255.255.0.0',
-                        'ip_address': '10.132.75.35'},
-               'type': 'private'}
-           ]
-        }
+    format.
+
+    Example JSON:
+     {'public': [
+           {'mac': '04:01:58:27:7f:01',
+            'ipv4': {'gateway': '45.55.32.1',
+                     'netmask': '255.255.224.0',
+                     'ip_address': '45.55.50.93'},
+            'anchor_ipv4': {
+                     'gateway': '10.17.0.1',
+                     'netmask': '255.255.0.0',
+                     'ip_address': '10.17.0.9'},
+            'type': 'public',
+            'ipv6': {'gateway': '....',
+                     'ip_address': '....',
+                     'cidr': 64}}
+        ],
+       'private': [
+           {'mac': '04:01:58:27:7f:02',
+            'ipv4': {'gateway': '10.132.0.1',
+                     'netmask': '255.255.0.0',
+                     'ip_address': '10.132.75.35'},
+            'type': 'private'}
+        ]
+     }
     """
 
     def _get_subnet_part(pcfg):
-        subpart = {'type': 'static',
-                   'control': 'auto',
-                   'address': pcfg.get('ip_address'),
-                   'gateway': pcfg.get('gateway')}
-
-        if ":" in pcfg.get('ip_address'):
-            subpart['address'] = "{0}/{1}".format(pcfg.get('ip_address'),
-                                                  pcfg.get('cidr'))
+        subpart = {
+            "type": "static",
+            "control": "auto",
+            "address": pcfg.get("ip_address"),
+            "gateway": pcfg.get("gateway"),
+        }
+
+        if ":" in pcfg.get("ip_address"):
+            subpart["address"] = "{0}/{1}".format(
+                pcfg.get("ip_address"), pcfg.get("cidr")
+            )
         else:
-            subpart['netmask'] = pcfg.get('netmask')
+            subpart["netmask"] = pcfg.get("netmask")
 
         return subpart
 
@@ -138,54 +150,66 @@ def convert_network_configuration(config, dns_servers):
         nic = config[n][0]
         LOG.debug("considering %s", nic)
 
-        mac_address = nic.get('mac')
+        mac_address = nic.get("mac")
         if mac_address not in macs_to_nics:
-            raise RuntimeError("Did not find network interface on system "
-                               "with mac '%s'. Cannot apply configuration: %s"
-                               % (mac_address, nic))
+            raise RuntimeError(
+                "Did not find network interface on system "
+                "with mac '%s'. Cannot apply configuration: %s"
+                % (mac_address, nic)
+            )
 
         sysfs_name = macs_to_nics.get(mac_address)
-        nic_type = nic.get('type', 'unknown')
+        nic_type = nic.get("type", "unknown")
 
         if_name = NIC_MAP.get(nic_type, sysfs_name)
         if if_name != sysfs_name:
-            LOG.debug("Found %s interface '%s' on '%s', assigned name of '%s'",
-                      nic_type, mac_address, sysfs_name, if_name)
+            LOG.debug(
+                "Found %s interface '%s' on '%s', assigned name of '%s'",
+                nic_type,
+                mac_address,
+                sysfs_name,
+                if_name,
+            )
         else:
-            msg = ("Found interface '%s' on '%s', which is not a public "
-                   "or private interface. Using default system naming.")
+            msg = (
+                "Found interface '%s' on '%s', which is not a public "
+                "or private interface. Using default system naming."
+            )
             LOG.debug(msg, mac_address, sysfs_name)
 
-        ncfg = {'type': 'physical',
-                'mac_address': mac_address,
-                'name': if_name}
+        ncfg = {
+            "type": "physical",
+            "mac_address": mac_address,
+            "name": if_name,
+        }
 
         subnets = []
-        for netdef in ('ipv4', 'ipv6', 'anchor_ipv4', 'anchor_ipv6'):
+        for netdef in ("ipv4", "ipv6", "anchor_ipv4", "anchor_ipv6"):
             raw_subnet = nic.get(netdef, None)
             if not raw_subnet:
                 continue
 
             sub_part = _get_subnet_part(raw_subnet)
             if nic_type != "public" or "anchor" in netdef:
-                del sub_part['gateway']
+                del sub_part["gateway"]
 
             subnets.append(sub_part)
 
-        ncfg['subnets'] = subnets
+        ncfg["subnets"] = subnets
         nic_configs.append(ncfg)
         LOG.debug("nic '%s' configuration: %s", if_name, ncfg)
 
     if dns_servers:
         LOG.debug("added dns servers: %s", dns_servers)
-        nic_configs.append({'type': 'nameserver', 'address': dns_servers})
+        nic_configs.append({"type": "nameserver", "address": dns_servers})
 
-    return {'version': 1, 'config': nic_configs}
+    return {"version": 1, "config": nic_configs}
 
 
 def read_metadata(url, timeout=2, sec_between=2, retries=30):
-    response = url_helper.readurl(url, timeout=timeout,
-                                  sec_between=sec_between, retries=retries)
+    response = url_helper.readurl(
+        url, timeout=timeout, sec_between=sec_between, retries=retries
+    )
     if not response.ok():
         raise RuntimeError("unable to read metadata at %s" % url)
     return json.loads(response.contents.decode())
@@ -202,16 +226,21 @@ def read_sysinfo():
 
     droplet_id = dmi.read_dmi_data("system-serial-number")
     if droplet_id:
-        LOG.debug("system identified via SMBIOS as DigitalOcean Droplet: %s",
-                  droplet_id)
+        LOG.debug(
+            "system identified via SMBIOS as DigitalOcean Droplet: %s",
+            droplet_id,
+        )
     else:
-        msg = ("system identified via SMBIOS as a DigitalOcean "
-               "Droplet, but did not provide an ID. Please file a "
-               "support ticket at: "
-               "https://cloud.digitalocean.com/support/tickets/new")
+        msg = (
+            "system identified via SMBIOS as a DigitalOcean "
+            "Droplet, but did not provide an ID. Please file a "
+            "support ticket at: "
+            "https://cloud.digitalocean.com/support/tickets/new"
+        )
         LOG.critical(msg)
         raise RuntimeError(msg)
 
     return (True, droplet_id)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/hetzner.py b/cloudinit/sources/helpers/hetzner.py
index 33dc4c53..592ae80b 100644
--- a/cloudinit/sources/helpers/hetzner.py
+++ b/cloudinit/sources/helpers/hetzner.py
@@ -3,24 +3,25 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import url_helper
-from cloudinit import util
-
 import base64
 import binascii
 
+from cloudinit import url_helper, util
+
 
 def read_metadata(url, timeout=2, sec_between=2, retries=30):
-    response = url_helper.readurl(url, timeout=timeout,
-                                  sec_between=sec_between, retries=retries)
+    response = url_helper.readurl(
+        url, timeout=timeout, sec_between=sec_between, retries=retries
+    )
     if not response.ok():
         raise RuntimeError("unable to read metadata at %s" % url)
     return util.load_yaml(response.contents.decode())
 
 
 def read_userdata(url, timeout=2, sec_between=2, retries=30):
-    response = url_helper.readurl(url, timeout=timeout,
-                                  sec_between=sec_between, retries=retries)
+    response = url_helper.readurl(
+        url, timeout=timeout, sec_between=sec_between, retries=retries
+    )
     if not response.ok():
         raise RuntimeError("unable to read userdata at %s" % url)
     return response.contents
diff --git a/cloudinit/sources/helpers/netlink.py b/cloudinit/sources/helpers/netlink.py
index e13d6834..2953e858 100644
--- a/cloudinit/sources/helpers/netlink.py
+++ b/cloudinit/sources/helpers/netlink.py
@@ -2,14 +2,14 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import log as logging
-from cloudinit import util
-from collections import namedtuple
-
 import os
 import select
 import socket
 import struct
+from collections import namedtuple
+
+from cloudinit import log as logging
+from cloudinit import util
 
 LOG = logging.getLogger(__name__)
 
@@ -47,29 +47,30 @@ OPER_TESTING = 4
 OPER_DORMANT = 5
 OPER_UP = 6
 
-RTAAttr = namedtuple('RTAAttr', ['length', 'rta_type', 'data'])
-InterfaceOperstate = namedtuple('InterfaceOperstate', ['ifname', 'operstate'])
-NetlinkHeader = namedtuple('NetlinkHeader', ['length', 'type', 'flags', 'seq',
-                                             'pid'])
+RTAAttr = namedtuple("RTAAttr", ["length", "rta_type", "data"])
+InterfaceOperstate = namedtuple("InterfaceOperstate", ["ifname", "operstate"])
+NetlinkHeader = namedtuple(
+    "NetlinkHeader", ["length", "type", "flags", "seq", "pid"]
+)
 
 
 class NetlinkCreateSocketError(RuntimeError):
-    '''Raised if netlink socket fails during create or bind.'''
+    """Raised if netlink socket fails during create or bind."""
 
 
 def create_bound_netlink_socket():
-    '''Creates netlink socket and bind on netlink group to catch interface
+    """Creates netlink socket and bind on netlink group to catch interface
     down/up events. The socket will bound only on RTMGRP_LINK (which only
     includes RTM_NEWLINK/RTM_DELLINK/RTM_GETLINK events). The socket is set to
     non-blocking mode since we're only receiving messages.
 
     :returns: netlink socket in non-blocking mode
     :raises: NetlinkCreateSocketError
-    '''
+    """
     try:
-        netlink_socket = socket.socket(socket.AF_NETLINK,
-                                       socket.SOCK_RAW,
-                                       socket.NETLINK_ROUTE)
+        netlink_socket = socket.socket(
+            socket.AF_NETLINK, socket.SOCK_RAW, socket.NETLINK_ROUTE
+        )
         netlink_socket.bind((os.getpid(), RTMGRP_LINK))
         netlink_socket.setblocking(0)
     except socket.error as e:
@@ -80,7 +81,7 @@ def create_bound_netlink_socket():
 
 
 def get_netlink_msg_header(data):
-    '''Gets netlink message type and length
+    """Gets netlink message type and length
 
     :param: data read from netlink socket
     :returns: netlink message type
@@ -92,18 +93,20 @@ def get_netlink_msg_header(data):
                __u32 nlmsg_seq;    /* Sequence number */
                __u32 nlmsg_pid;    /* Sender port ID */
     };
-    '''
-    assert (data is not None), ("data is none")
-    assert (len(data) >= NLMSGHDR_SIZE), (
-        "data is smaller than netlink message header")
-    msg_len, msg_type, flags, seq, pid = struct.unpack(NLMSGHDR_FMT,
-                                                       data[:MSG_TYPE_OFFSET])
+    """
+    assert data is not None, "data is none"
+    assert (
+        len(data) >= NLMSGHDR_SIZE
+    ), "data is smaller than netlink message header"
+    msg_len, msg_type, flags, seq, pid = struct.unpack(
+        NLMSGHDR_FMT, data[:MSG_TYPE_OFFSET]
+    )
     LOG.debug("Got netlink msg of type %d", msg_type)
     return NetlinkHeader(msg_len, msg_type, flags, seq, pid)
 
 
 def read_netlink_socket(netlink_socket, timeout=None):
-    '''Select and read from the netlink socket if ready.
+    """Select and read from the netlink socket if ready.
 
     :param: netlink_socket: specify which socket object to read from
     :param: timeout: specify a timeout value (integer) to wait while reading,
@@ -111,8 +114,8 @@ def read_netlink_socket(netlink_socket, timeout=None):
     :returns: string of data read (max length = <MAX_SIZE>) from socket,
               if no data read, returns None
     :raises: AssertionError if netlink_socket is None
-    '''
-    assert (netlink_socket is not None), ("netlink socket is none")
+    """
+    assert netlink_socket is not None, "netlink socket is none"
     read_set, _, _ = select.select([netlink_socket], [], [], timeout)
     # Incase of timeout,read_set doesn't contain netlink socket.
     # just return from this function
@@ -126,32 +129,33 @@ def read_netlink_socket(netlink_socket, timeout=None):
 
 
 def unpack_rta_attr(data, offset):
-    '''Unpack a single rta attribute.
+    """Unpack a single rta attribute.
 
     :param: data: string of data read from netlink socket
     :param: offset: starting offset of RTA Attribute
     :return: RTAAttr object with length, type and data. On error, return None.
     :raises: AssertionError if data is None or offset is not integer.
-    '''
-    assert (data is not None), ("data is none")
-    assert (type(offset) == int), ("offset is not integer")
-    assert (offset >= RTATTR_START_OFFSET), (
-        "rta offset is less than expected length")
+    """
+    assert data is not None, "data is none"
+    assert type(offset) == int, "offset is not integer"
+    assert (
+        offset >= RTATTR_START_OFFSET
+    ), "rta offset is less than expected length"
     length = rta_type = 0
     attr_data = None
     try:
         length = struct.unpack_from("H", data, offset=offset)[0]
-        rta_type = struct.unpack_from("H", data, offset=offset+2)[0]
+        rta_type = struct.unpack_from("H", data, offset=offset + 2)[0]
     except struct.error:
         return None  # Should mean our offset is >= remaining data
 
     # Unpack just the attribute's data. Offset by 4 to skip length/type header
-    attr_data = data[offset+RTA_DATA_START_OFFSET:offset+length]
+    attr_data = data[offset + RTA_DATA_START_OFFSET : offset + length]
     return RTAAttr(length, rta_type, attr_data)
 
 
 def read_rta_oper_state(data):
-    '''Reads Interface name and operational state from RTA Data.
+    """Reads Interface name and operational state from RTA Data.
 
     :param: data: string of data read from netlink socket
     :returns: InterfaceOperstate object containing if_name and oper_state.
@@ -159,10 +163,11 @@ def read_rta_oper_state(data):
               IFLA_IFNAME messages.
     :raises: AssertionError if data is None or length of data is
              smaller than RTATTR_START_OFFSET.
-    '''
-    assert (data is not None), ("data is none")
-    assert (len(data) > RTATTR_START_OFFSET), (
-        "length of data is smaller than RTATTR_START_OFFSET")
+    """
+    assert data is not None, "data is none"
+    assert (
+        len(data) > RTATTR_START_OFFSET
+    ), "length of data is smaller than RTATTR_START_OFFSET"
     ifname = operstate = None
     offset = RTATTR_START_OFFSET
     while offset <= len(data):
@@ -170,15 +175,16 @@ def read_rta_oper_state(data):
         if not attr or attr.length == 0:
             break
         # Each attribute is 4-byte aligned. Determine pad length.
-        padlen = (PAD_ALIGNMENT -
-                  (attr.length % PAD_ALIGNMENT)) % PAD_ALIGNMENT
+        padlen = (
+            PAD_ALIGNMENT - (attr.length % PAD_ALIGNMENT)
+        ) % PAD_ALIGNMENT
         offset += attr.length + padlen
 
         if attr.rta_type == IFLA_OPERSTATE:
             operstate = ord(attr.data)
         elif attr.rta_type == IFLA_IFNAME:
-            interface_name = util.decode_binary(attr.data, 'utf-8')
-            ifname = interface_name.strip('\0')
+            interface_name = util.decode_binary(attr.data, "utf-8")
+            ifname = interface_name.strip("\0")
     if not ifname or operstate is None:
         return None
     LOG.debug("rta attrs: ifname %s operstate %d", ifname, operstate)
@@ -186,12 +192,12 @@ def read_rta_oper_state(data):
 
 
 def wait_for_nic_attach_event(netlink_socket, existing_nics):
-    '''Block until a single nic is attached.
+    """Block until a single nic is attached.
 
     :param: netlink_socket: netlink_socket to receive events
     :param: existing_nics: List of existing nics so that we can skip them.
     :raises: AssertionError if netlink_socket is none.
-    '''
+    """
     LOG.debug("Preparing to wait for nic attach.")
     ifname = None
 
@@ -204,19 +210,21 @@ def wait_for_nic_attach_event(netlink_socket, existing_nics):
 
     # We can return even if the operational state of the new nic is DOWN
     # because we set it to UP before doing dhcp.
-    read_netlink_messages(netlink_socket,
-                          None,
-                          [RTM_NEWLINK],
-                          [OPER_UP, OPER_DOWN],
-                          should_continue_cb)
+    read_netlink_messages(
+        netlink_socket,
+        None,
+        [RTM_NEWLINK],
+        [OPER_UP, OPER_DOWN],
+        should_continue_cb,
+    )
     return ifname
 
 
 def wait_for_nic_detach_event(netlink_socket):
-    '''Block until a single nic is detached and its operational state is down.
+    """Block until a single nic is detached and its operational state is down.
 
     :param: netlink_socket: netlink_socket to receive events.
-    '''
+    """
     LOG.debug("Preparing to wait for nic detach.")
     ifname = None
 
@@ -225,16 +233,14 @@ def wait_for_nic_detach_event(netlink_socket):
         ifname = iname
         return False
 
-    read_netlink_messages(netlink_socket,
-                          None,
-                          [RTM_DELLINK],
-                          [OPER_DOWN],
-                          should_continue_cb)
+    read_netlink_messages(
+        netlink_socket, None, [RTM_DELLINK], [OPER_DOWN], should_continue_cb
+    )
     return ifname
 
 
 def wait_for_media_disconnect_connect(netlink_socket, ifname):
-    '''Block until media disconnect and connect has happened on an interface.
+    """Block until media disconnect and connect has happened on an interface.
     Listens on netlink socket to receive netlink events and when the carrier
     changes from 0 to 1, it considers event has happened and
     return from this function
@@ -242,10 +248,10 @@ def wait_for_media_disconnect_connect(netlink_socket, ifname):
     :param: netlink_socket: netlink_socket to receive events
     :param: ifname: Interface name to lookout for netlink events
     :raises: AssertionError if netlink_socket is None or ifname is None.
-    '''
-    assert (netlink_socket is not None), ("netlink socket is none")
-    assert (ifname is not None), ("interface name is none")
-    assert (len(ifname) > 0), ("interface name cannot be empty")
+    """
+    assert netlink_socket is not None, "netlink socket is none"
+    assert ifname is not None, "interface name is none"
+    assert len(ifname) > 0, "interface name cannot be empty"
 
     def should_continue_cb(iname, carrier, prevCarrier):
         # check for carrier down, up sequence
@@ -256,19 +262,23 @@ def wait_for_media_disconnect_connect(netlink_socket, ifname):
         return True
 
     LOG.debug("Wait for media disconnect and reconnect to happen")
-    read_netlink_messages(netlink_socket,
-                          ifname,
-                          [RTM_NEWLINK, RTM_DELLINK],
-                          [OPER_UP, OPER_DOWN],
-                          should_continue_cb)
-
-
-def read_netlink_messages(netlink_socket,
-                          ifname_filter,
-                          rtm_types,
-                          operstates,
-                          should_continue_callback):
-    ''' Reads from the netlink socket until the condition specified by
+    read_netlink_messages(
+        netlink_socket,
+        ifname,
+        [RTM_NEWLINK, RTM_DELLINK],
+        [OPER_UP, OPER_DOWN],
+        should_continue_cb,
+    )
+
+
+def read_netlink_messages(
+    netlink_socket,
+    ifname_filter,
+    rtm_types,
+    operstates,
+    should_continue_callback,
+):
+    """Reads from the netlink socket until the condition specified by
     the continuation callback is met.
 
     :param: netlink_socket: netlink_socket to receive events.
@@ -276,7 +286,7 @@ def read_netlink_messages(netlink_socket,
     :param: rtm_types: Type of netlink events to listen for.
     :param: operstates: Operational states to listen.
     :param: should_continue_callback: Specifies when to stop listening.
-    '''
+    """
     if netlink_socket is None:
         raise RuntimeError("Netlink socket is none")
     data = bytes()
@@ -286,9 +296,9 @@ def read_netlink_messages(netlink_socket,
         recv_data = read_netlink_socket(netlink_socket, SELECT_TIMEOUT)
         if recv_data is None:
             continue
-        LOG.debug('read %d bytes from socket', len(recv_data))
+        LOG.debug("read %d bytes from socket", len(recv_data))
         data += recv_data
-        LOG.debug('Length of data after concat %d', len(data))
+        LOG.debug("Length of data after concat %d", len(data))
         offset = 0
         datalen = len(data)
         while offset < datalen:
@@ -300,30 +310,37 @@ def read_netlink_messages(netlink_socket,
             if len(nl_msg) < nlheader.length:
                 LOG.debug("Partial data. Smaller than netlink message")
                 break
-            padlen = (nlheader.length+PAD_ALIGNMENT-1) & ~(PAD_ALIGNMENT-1)
+            padlen = (nlheader.length + PAD_ALIGNMENT - 1) & ~(
+                PAD_ALIGNMENT - 1
+            )
             offset = offset + padlen
-            LOG.debug('offset to next netlink message: %d', offset)
+            LOG.debug("offset to next netlink message: %d", offset)
             # Continue if we are not interested in this message.
             if nlheader.type not in rtm_types:
                 continue
             interface_state = read_rta_oper_state(nl_msg)
             if interface_state is None:
-                LOG.debug('Failed to read rta attributes: %s', interface_state)
+                LOG.debug("Failed to read rta attributes: %s", interface_state)
                 continue
-            if (ifname_filter is not None and
-                    interface_state.ifname != ifname_filter):
+            if (
+                ifname_filter is not None
+                and interface_state.ifname != ifname_filter
+            ):
                 LOG.debug(
                     "Ignored netlink event on interface %s. Waiting for %s.",
-                    interface_state.ifname, ifname_filter)
+                    interface_state.ifname,
+                    ifname_filter,
+                )
                 continue
             if interface_state.operstate not in operstates:
                 continue
             prevCarrier = carrier
             carrier = interface_state.operstate
-            if not should_continue_callback(interface_state.ifname,
-                                            carrier,
-                                            prevCarrier):
+            if not should_continue_callback(
+                interface_state.ifname, carrier, prevCarrier
+            ):
                 return
         data = data[offset:]
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/openstack.py b/cloudinit/sources/helpers/openstack.py
index 4f566e64..a42543e4 100644
--- a/cloudinit/sources/helpers/openstack.py
+++ b/cloudinit/sources/helpers/openstack.py
@@ -14,11 +14,7 @@ import os
 
 from cloudinit import ec2_utils
 from cloudinit import log as logging
-from cloudinit import net
-from cloudinit import sources
-from cloudinit import subp
-from cloudinit import url_helper
-from cloudinit import util
+from cloudinit import net, sources, subp, url_helper, util
 from cloudinit.sources import BrokenMetadata
 
 # See https://docs.openstack.org/user-guide/cli-config-drive.html
@@ -27,30 +23,30 @@ LOG = logging.getLogger(__name__)
 
 FILES_V1 = {
     # Path <-> (metadata key name, translator function, default value)
-    'etc/network/interfaces': ('network_config', lambda x: x, ''),
-    'meta.js': ('meta_js', util.load_json, {}),
-    "root/.ssh/authorized_keys": ('authorized_keys', lambda x: x, ''),
+    "etc/network/interfaces": ("network_config", lambda x: x, ""),
+    "meta.js": ("meta_js", util.load_json, {}),
+    "root/.ssh/authorized_keys": ("authorized_keys", lambda x: x, ""),
 }
 KEY_COPIES = (
     # Cloud-init metadata names <-> (metadata key, is required)
-    ('local-hostname', 'hostname', False),
-    ('instance-id', 'uuid', True),
+    ("local-hostname", "hostname", False),
+    ("instance-id", "uuid", True),
 )
 
 # Versions and names taken from nova source nova/api/metadata/base.py
-OS_LATEST = 'latest'
-OS_FOLSOM = '2012-08-10'
-OS_GRIZZLY = '2013-04-04'
-OS_HAVANA = '2013-10-17'
-OS_LIBERTY = '2015-10-15'
+OS_LATEST = "latest"
+OS_FOLSOM = "2012-08-10"
+OS_GRIZZLY = "2013-04-04"
+OS_HAVANA = "2013-10-17"
+OS_LIBERTY = "2015-10-15"
 # NEWTON_ONE adds 'devices' to md (sriov-pf-passthrough-neutron-port-vlan)
-OS_NEWTON_ONE = '2016-06-30'
+OS_NEWTON_ONE = "2016-06-30"
 # NEWTON_TWO adds vendor_data2.json (vendordata-reboot)
-OS_NEWTON_TWO = '2016-10-06'
+OS_NEWTON_TWO = "2016-10-06"
 # OS_OCATA adds 'vif' field to devices (sriov-pf-passthrough-neutron-port-vlan)
-OS_OCATA = '2017-02-22'
+OS_OCATA = "2017-02-22"
 # OS_ROCKY adds a vf_trusted field to devices (sriov-trusted-vfs)
-OS_ROCKY = '2018-08-27'
+OS_ROCKY = "2018-08-27"
 
 
 # keep this in chronological order. new supported versions go at the end.
@@ -67,18 +63,18 @@ OS_VERSIONS = (
 
 KNOWN_PHYSICAL_TYPES = (
     None,
-    'bgpovs',  # not present in OpenStack upstream but used on OVH cloud.
-    'bridge',
-    'cascading',  # not present in OpenStack upstream, used on OpenTelekomCloud
-    'dvs',
-    'ethernet',
-    'hw_veb',
-    'hyperv',
-    'ovs',
-    'phy',
-    'tap',
-    'vhostuser',
-    'vif',
+    "bgpovs",  # not present in OpenStack upstream but used on OVH cloud.
+    "bridge",
+    "cascading",  # not present in OpenStack upstream, used on OpenTelekomCloud
+    "dvs",
+    "ethernet",
+    "hw_veb",
+    "hyperv",
+    "ovs",
+    "phy",
+    "tap",
+    "vhostuser",
+    "vif",
 )
 
 
@@ -90,7 +86,7 @@ class SourceMixin(object):
     def _ec2_name_to_device(self, name):
         if not self.ec2_metadata:
             return None
-        bdm = self.ec2_metadata.get('block-device-mapping', {})
+        bdm = self.ec2_metadata.get("block-device-mapping", {})
         for (ent_name, device) in bdm.items():
             if name == ent_name:
                 return device
@@ -105,9 +101,9 @@ class SourceMixin(object):
     def _os_name_to_device(self, name):
         device = None
         try:
-            criteria = 'LABEL=%s' % (name)
-            if name == 'swap':
-                criteria = 'TYPE=%s' % (name)
+            criteria = "LABEL=%s" % (name)
+            if name == "swap":
+                criteria = "TYPE=%s" % (name)
             dev_entries = util.find_devs_with(criteria)
             if dev_entries:
                 device = dev_entries[0]
@@ -135,10 +131,10 @@ class SourceMixin(object):
             return None
         # Try the ec2 mapping first
         names = [name]
-        if name == 'root':
-            names.insert(0, 'ami')
-        if name == 'ami':
-            names.append('root')
+        if name == "root":
+            names.insert(0, "ami")
+        if name == "ami":
+            names.append("root")
         device = None
         LOG.debug("Using ec2 style lookup to find device %s", names)
         for n in names:
@@ -163,7 +159,6 @@ class SourceMixin(object):
 
 
 class BaseReader(metaclass=abc.ABCMeta):
-
     def __init__(self, base_path):
         self.base_path = base_path
 
@@ -187,8 +182,11 @@ class BaseReader(metaclass=abc.ABCMeta):
         try:
             versions_available = self._fetch_available_versions()
         except Exception as e:
-            LOG.debug("Unable to read openstack versions from %s due to: %s",
-                      self.base_path, e)
+            LOG.debug(
+                "Unable to read openstack versions from %s due to: %s",
+                self.base_path,
+                e,
+            )
             versions_available = []
 
         # openstack.OS_VERSIONS is stored in chronological order, so
@@ -202,12 +200,15 @@ class BaseReader(metaclass=abc.ABCMeta):
             selected_version = potential_version
             break
 
-        LOG.debug("Selected version '%s' from %s", selected_version,
-                  versions_available)
+        LOG.debug(
+            "Selected version '%s' from %s",
+            selected_version,
+            versions_available,
+        )
         return selected_version
 
     def _read_content_path(self, item, decode=False):
-        path = item.get('content_path', '').lstrip("/")
+        path = item.get("content_path", "").lstrip("/")
         path_pieces = path.split("/")
         valid_pieces = [p for p in path_pieces if len(p)]
         if not valid_pieces:
@@ -225,43 +226,44 @@ class BaseReader(metaclass=abc.ABCMeta):
         """
 
         load_json_anytype = functools.partial(
-            util.load_json, root_types=(dict, list, str))
+            util.load_json, root_types=(dict, list, str)
+        )
 
         def datafiles(version):
             files = {}
-            files['metadata'] = (
+            files["metadata"] = (
                 # File path to read
-                self._path_join("openstack", version, 'meta_data.json'),
+                self._path_join("openstack", version, "meta_data.json"),
                 # Is it required?
                 True,
                 # Translator function (applied after loading)
                 util.load_json,
             )
-            files['userdata'] = (
-                self._path_join("openstack", version, 'user_data'),
+            files["userdata"] = (
+                self._path_join("openstack", version, "user_data"),
                 False,
                 lambda x: x,
             )
-            files['vendordata'] = (
-                self._path_join("openstack", version, 'vendor_data.json'),
+            files["vendordata"] = (
+                self._path_join("openstack", version, "vendor_data.json"),
                 False,
                 load_json_anytype,
             )
-            files['vendordata2'] = (
-                self._path_join("openstack", version, 'vendor_data2.json'),
+            files["vendordata2"] = (
+                self._path_join("openstack", version, "vendor_data2.json"),
                 False,
                 load_json_anytype,
             )
-            files['networkdata'] = (
-                self._path_join("openstack", version, 'network_data.json'),
+            files["networkdata"] = (
+                self._path_join("openstack", version, "network_data.json"),
                 False,
                 load_json_anytype,
             )
             return files
 
         results = {
-            'userdata': '',
-            'version': 2,
+            "userdata": "",
+            "version": 2,
         }
         data = datafiles(self._find_working_version())
         for (name, (path, required, translator)) in data.items():
@@ -272,11 +274,13 @@ class BaseReader(metaclass=abc.ABCMeta):
                 data = self._path_read(path)
             except IOError as e:
                 if not required:
-                    LOG.debug("Failed reading optional path %s due"
-                              " to: %s", path, e)
+                    LOG.debug(
+                        "Failed reading optional path %s due to: %s", path, e
+                    )
                 else:
-                    LOG.debug("Failed reading mandatory path %s due"
-                              " to: %s", path, e)
+                    LOG.debug(
+                        "Failed reading mandatory path %s due to: %s", path, e
+                    )
             else:
                 found = True
             if required and not found:
@@ -291,11 +295,11 @@ class BaseReader(metaclass=abc.ABCMeta):
             if found:
                 results[name] = data
 
-        metadata = results['metadata']
-        if 'random_seed' in metadata:
-            random_seed = metadata['random_seed']
+        metadata = results["metadata"]
+        if "random_seed" in metadata:
+            random_seed = metadata["random_seed"]
             try:
-                metadata['random_seed'] = base64.b64decode(random_seed)
+                metadata["random_seed"] = base64.b64decode(random_seed)
             except (ValueError, TypeError) as e:
                 raise BrokenMetadata(
                     "Badly formatted metadata random_seed entry: %s" % e
@@ -303,18 +307,18 @@ class BaseReader(metaclass=abc.ABCMeta):
 
         # load any files that were provided
         files = {}
-        metadata_files = metadata.get('files', [])
+        metadata_files = metadata.get("files", [])
         for item in metadata_files:
-            if 'path' not in item:
+            if "path" not in item:
                 continue
-            path = item['path']
+            path = item["path"]
             try:
                 files[path] = self._read_content_path(item)
             except Exception as e:
                 raise BrokenMetadata(
                     "Failed to read provided file %s: %s" % (path, e)
                 ) from e
-        results['files'] = files
+        results["files"] = files
 
         # The 'network_config' item in metadata is a content pointer
         # to the network config that should be applied. It is just a
@@ -323,7 +327,7 @@ class BaseReader(metaclass=abc.ABCMeta):
         if net_item:
             try:
                 content = self._read_content_path(net_item, decode=True)
-                results['network_config'] = content
+                results["network_config"] = content
             except IOError as e:
                 raise BrokenMetadata(
                     "Failed to read network configuration: %s" % (e)
@@ -334,12 +338,12 @@ class BaseReader(metaclass=abc.ABCMeta):
         # if they specify 'dsmode' they're indicating the mode that they intend
         # for this datasource to operate in.
         try:
-            results['dsmode'] = metadata['meta']['dsmode']
+            results["dsmode"] = metadata["meta"]["dsmode"]
         except KeyError:
             pass
 
         # Read any ec2-metadata (if applicable)
-        results['ec2-metadata'] = self._read_ec2_metadata()
+        results["ec2-metadata"] = self._read_ec2_metadata()
 
         # Perform some misc. metadata key renames...
         for (target_key, source_key, is_required) in KEY_COPIES:
@@ -364,15 +368,19 @@ class ConfigDriveReader(BaseReader):
 
     def _fetch_available_versions(self):
         if self._versions is None:
-            path = self._path_join(self.base_path, 'openstack')
-            found = [d for d in os.listdir(path)
-                     if os.path.isdir(os.path.join(path))]
+            path = self._path_join(self.base_path, "openstack")
+            found = [
+                d
+                for d in os.listdir(path)
+                if os.path.isdir(os.path.join(path))
+            ]
             self._versions = sorted(found)
         return self._versions
 
     def _read_ec2_metadata(self):
-        path = self._path_join(self.base_path,
-                               'ec2', 'latest', 'meta-data.json')
+        path = self._path_join(
+            self.base_path, "ec2", "latest", "meta-data.json"
+        )
         if not os.path.exists(path):
             return {}
         else:
@@ -419,14 +427,14 @@ class ConfigDriveReader(BaseReader):
             else:
                 md[key] = copy.deepcopy(default)
 
-        keydata = md['authorized_keys']
-        meta_js = md['meta_js']
+        keydata = md["authorized_keys"]
+        meta_js = md["meta_js"]
 
         # keydata in meta_js is preferred over "injected"
-        keydata = meta_js.get('public-keys', keydata)
+        keydata = meta_js.get("public-keys", keydata)
         if keydata:
             lines = keydata.splitlines()
-            md['public-keys'] = [
+            md["public-keys"] = [
                 line
                 for line in lines
                 if len(line) and not line.startswith("#")
@@ -434,25 +442,25 @@ class ConfigDriveReader(BaseReader):
 
         # config-drive-v1 has no way for openstack to provide the instance-id
         # so we copy that into metadata from the user input
-        if 'instance-id' in meta_js:
-            md['instance-id'] = meta_js['instance-id']
+        if "instance-id" in meta_js:
+            md["instance-id"] = meta_js["instance-id"]
 
         results = {
-            'version': 1,
-            'metadata': md,
+            "version": 1,
+            "metadata": md,
         }
 
         # allow the user to specify 'dsmode' in a meta tag
-        if 'dsmode' in meta_js:
-            results['dsmode'] = meta_js['dsmode']
+        if "dsmode" in meta_js:
+            results["dsmode"] = meta_js["dsmode"]
 
         # config-drive-v1 has no way of specifying user-data, so the user has
         # to cheat and stuff it in a meta tag also.
-        results['userdata'] = meta_js.get('user-data', '')
+        results["userdata"] = meta_js.get("user-data", "")
 
         # this implementation does not support files other than
         # network/interfaces and authorized_keys...
-        results['files'] = {}
+        results["files"] = {}
 
         return results
 
@@ -481,7 +489,6 @@ class MetadataReader(BaseReader):
         return self._versions
 
     def _path_read(self, path, decode=False):
-
         def should_retry_cb(_request_args, cause):
             try:
                 code = int(cause.code)
@@ -492,11 +499,13 @@ class MetadataReader(BaseReader):
                 pass
             return True
 
-        response = url_helper.readurl(path,
-                                      retries=self.retries,
-                                      ssl_details=self.ssl_details,
-                                      timeout=self.timeout,
-                                      exception_cb=should_retry_cb)
+        response = url_helper.readurl(
+            path,
+            retries=self.retries,
+            ssl_details=self.ssl_details,
+            timeout=self.timeout,
+            exception_cb=should_retry_cb,
+        )
         if decode:
             return response.contents.decode()
         else:
@@ -506,9 +515,11 @@ class MetadataReader(BaseReader):
         return url_helper.combine_url(base, *add_ons)
 
     def _read_ec2_metadata(self):
-        return ec2_utils.get_instance_metadata(ssl_details=self.ssl_details,
-                                               timeout=self.timeout,
-                                               retries=self.retries)
+        return ec2_utils.get_instance_metadata(
+            ssl_details=self.ssl_details,
+            timeout=self.timeout,
+            retries=self.retries,
+        )
 
 
 # Convert OpenStack ConfigDrive NetworkData json to network_config yaml
@@ -544,32 +555,32 @@ def convert_net_json(network_json=None, known_macs=None):
 
     # dict of network_config key for filtering network_json
     valid_keys = {
-        'physical': [
-            'name',
-            'type',
-            'mac_address',
-            'subnets',
-            'params',
-            'mtu',
+        "physical": [
+            "name",
+            "type",
+            "mac_address",
+            "subnets",
+            "params",
+            "mtu",
         ],
-        'subnet': [
-            'type',
-            'address',
-            'netmask',
-            'broadcast',
-            'metric',
-            'gateway',
-            'pointopoint',
-            'scope',
-            'dns_nameservers',
-            'dns_search',
-            'routes',
+        "subnet": [
+            "type",
+            "address",
+            "netmask",
+            "broadcast",
+            "metric",
+            "gateway",
+            "pointopoint",
+            "scope",
+            "dns_nameservers",
+            "dns_search",
+            "routes",
         ],
     }
 
-    links = network_json.get('links', [])
-    networks = network_json.get('networks', [])
-    services = network_json.get('services', [])
+    links = network_json.get("links", [])
+    networks = network_json.get("networks", [])
+    services = network_json.get("services", [])
 
     link_updates = []
     link_id_info = {}
@@ -578,65 +589,77 @@ def convert_net_json(network_json=None, known_macs=None):
     config = []
     for link in links:
         subnets = []
-        cfg = dict((k, v) for k, v in link.items()
-                   if k in valid_keys['physical'])
+        cfg = dict(
+            (k, v) for k, v in link.items() if k in valid_keys["physical"]
+        )
         # 'name' is not in openstack spec yet, but we will support it if it is
         # present.  The 'id' in the spec is currently implemented as the host
         # nic's name, meaning something like 'tap-adfasdffd'.  We do not want
         # to name guest devices with such ugly names.
-        if 'name' in link:
-            cfg['name'] = link['name']
+        if "name" in link:
+            cfg["name"] = link["name"]
 
         link_mac_addr = None
-        if link.get('ethernet_mac_address'):
-            link_mac_addr = link.get('ethernet_mac_address').lower()
-            link_id_info[link['id']] = link_mac_addr
-
-        curinfo = {'name': cfg.get('name'), 'mac': link_mac_addr,
-                   'id': link['id'], 'type': link['type']}
-
-        for network in [n for n in networks
-                        if n['link'] == link['id']]:
-            subnet = dict((k, v) for k, v in network.items()
-                          if k in valid_keys['subnet'])
-
-            if network['type'] == 'ipv4_dhcp':
-                subnet.update({'type': 'dhcp4'})
-            elif network['type'] == 'ipv6_dhcp':
-                subnet.update({'type': 'dhcp6'})
-            elif network['type'] in ['ipv6_slaac', 'ipv6_dhcpv6-stateless',
-                                     'ipv6_dhcpv6-stateful']:
-                subnet.update({'type': network['type']})
-            elif network['type'] in ['ipv4', 'static']:
-                subnet.update({
-                    'type': 'static',
-                    'address': network.get('ip_address'),
-                })
-            elif network['type'] in ['ipv6', 'static6']:
-                cfg.update({'accept-ra': False})
-                subnet.update({
-                    'type': 'static6',
-                    'address': network.get('ip_address'),
-                })
+        if link.get("ethernet_mac_address"):
+            link_mac_addr = link.get("ethernet_mac_address").lower()
+            link_id_info[link["id"]] = link_mac_addr
+
+        curinfo = {
+            "name": cfg.get("name"),
+            "mac": link_mac_addr,
+            "id": link["id"],
+            "type": link["type"],
+        }
+
+        for network in [n for n in networks if n["link"] == link["id"]]:
+            subnet = dict(
+                (k, v) for k, v in network.items() if k in valid_keys["subnet"]
+            )
+
+            if network["type"] == "ipv4_dhcp":
+                subnet.update({"type": "dhcp4"})
+            elif network["type"] == "ipv6_dhcp":
+                subnet.update({"type": "dhcp6"})
+            elif network["type"] in [
+                "ipv6_slaac",
+                "ipv6_dhcpv6-stateless",
+                "ipv6_dhcpv6-stateful",
+            ]:
+                subnet.update({"type": network["type"]})
+            elif network["type"] in ["ipv4", "static"]:
+                subnet.update(
+                    {
+                        "type": "static",
+                        "address": network.get("ip_address"),
+                    }
+                )
+            elif network["type"] in ["ipv6", "static6"]:
+                cfg.update({"accept-ra": False})
+                subnet.update(
+                    {
+                        "type": "static6",
+                        "address": network.get("ip_address"),
+                    }
+                )
 
             # Enable accept_ra for stateful and legacy ipv6_dhcp types
-            if network['type'] in ['ipv6_dhcpv6-stateful', 'ipv6_dhcp']:
-                cfg.update({'accept-ra': True})
+            if network["type"] in ["ipv6_dhcpv6-stateful", "ipv6_dhcp"]:
+                cfg.update({"accept-ra": True})
 
-            if network['type'] == 'ipv4':
-                subnet['ipv4'] = True
-            if network['type'] == 'ipv6':
-                subnet['ipv6'] = True
+            if network["type"] == "ipv4":
+                subnet["ipv4"] = True
+            if network["type"] == "ipv6":
+                subnet["ipv6"] = True
             subnets.append(subnet)
-        cfg.update({'subnets': subnets})
-        if link['type'] in ['bond']:
+        cfg.update({"subnets": subnets})
+        if link["type"] in ["bond"]:
             params = {}
             if link_mac_addr:
-                params['mac_address'] = link_mac_addr
+                params["mac_address"] = link_mac_addr
             for k, v in link.items():
-                if k == 'bond_links':
+                if k == "bond_links":
                     continue
-                elif k.startswith('bond'):
+                elif k.startswith("bond"):
                     params.update({k: v})
 
             # openstack does not provide a name for the bond.
@@ -649,35 +672,45 @@ def convert_net_json(network_json=None, known_macs=None):
             # to the network config by their nic name.
             # store that in bond_links_needed, and update these later.
             link_updates.append(
-                (cfg, 'bond_interfaces', '%s',
-                 copy.deepcopy(link['bond_links']))
+                (
+                    cfg,
+                    "bond_interfaces",
+                    "%s",
+                    copy.deepcopy(link["bond_links"]),
+                )
+            )
+            cfg.update({"params": params, "name": link_name})
+
+            curinfo["name"] = link_name
+        elif link["type"] in ["vlan"]:
+            name = "%s.%s" % (link["vlan_link"], link["vlan_id"])
+            cfg.update(
+                {
+                    "name": name,
+                    "vlan_id": link["vlan_id"],
+                    "mac_address": link["vlan_mac_address"],
+                }
+            )
+            link_updates.append((cfg, "vlan_link", "%s", link["vlan_link"]))
+            link_updates.append(
+                (cfg, "name", "%%s.%s" % link["vlan_id"], link["vlan_link"])
             )
-            cfg.update({'params': params, 'name': link_name})
-
-            curinfo['name'] = link_name
-        elif link['type'] in ['vlan']:
-            name = "%s.%s" % (link['vlan_link'], link['vlan_id'])
-            cfg.update({
-                'name': name,
-                'vlan_id': link['vlan_id'],
-                'mac_address': link['vlan_mac_address'],
-            })
-            link_updates.append((cfg, 'vlan_link', '%s', link['vlan_link']))
-            link_updates.append((cfg, 'name', "%%s.%s" % link['vlan_id'],
-                                 link['vlan_link']))
-            curinfo.update({'mac': link['vlan_mac_address'],
-                            'name': name})
+            curinfo.update({"mac": link["vlan_mac_address"], "name": name})
         else:
-            if link['type'] not in KNOWN_PHYSICAL_TYPES:
-                LOG.warning('Unknown network_data link type (%s); treating as'
-                            ' physical', link['type'])
-            cfg.update({'type': 'physical', 'mac_address': link_mac_addr})
+            if link["type"] not in KNOWN_PHYSICAL_TYPES:
+                LOG.warning(
+                    "Unknown network_data link type (%s); treating as"
+                    " physical",
+                    link["type"],
+                )
+            cfg.update({"type": "physical", "mac_address": link_mac_addr})
 
         config.append(cfg)
-        link_id_info[curinfo['id']] = curinfo
+        link_id_info[curinfo["id"]] = curinfo
 
-    need_names = [d for d in config
-                  if d.get('type') == 'physical' and 'name' not in d]
+    need_names = [
+        d for d in config if d.get("type") == "physical" and "name" not in d
+    ]
 
     if need_names or link_updates:
         if known_macs is None:
@@ -685,26 +718,26 @@ def convert_net_json(network_json=None, known_macs=None):
 
         # go through and fill out the link_id_info with names
         for _link_id, info in link_id_info.items():
-            if info.get('name'):
+            if info.get("name"):
                 continue
-            if info.get('mac') in known_macs:
-                info['name'] = known_macs[info['mac']]
+            if info.get("mac") in known_macs:
+                info["name"] = known_macs[info["mac"]]
 
         for d in need_names:
-            mac = d.get('mac_address')
+            mac = d.get("mac_address")
             if not mac:
                 raise ValueError("No mac_address or name entry for %s" % d)
             if mac not in known_macs:
                 raise ValueError("Unable to find a system nic for %s" % d)
-            d['name'] = known_macs[mac]
+            d["name"] = known_macs[mac]
 
         for cfg, key, fmt, targets in link_updates:
             if isinstance(targets, (list, tuple)):
                 cfg[key] = [
-                    fmt % link_id_info[target]['name'] for target in targets
+                    fmt % link_id_info[target]["name"] for target in targets
                 ]
             else:
-                cfg[key] = fmt % link_id_info[targets]['name']
+                cfg[key] = fmt % link_id_info[targets]["name"]
 
     # Infiniband interfaces may be referenced in network_data.json by a 6 byte
     # Ethernet MAC-style address, and we use that address to look up the
@@ -713,15 +746,16 @@ def convert_net_json(network_json=None, known_macs=None):
     ib_known_hwaddrs = net.get_ib_hwaddrs_by_interface()
     if ib_known_hwaddrs:
         for cfg in config:
-            if cfg['name'] in ib_known_hwaddrs:
-                cfg['mac_address'] = ib_known_hwaddrs[cfg['name']]
-                cfg['type'] = 'infiniband'
+            if cfg["name"] in ib_known_hwaddrs:
+                cfg["mac_address"] = ib_known_hwaddrs[cfg["name"]]
+                cfg["type"] = "infiniband"
 
     for service in services:
         cfg = service
-        cfg.update({'type': 'nameserver'})
+        cfg.update({"type": "nameserver"})
         config.append(cfg)
 
-    return {'version': 1, 'config': config}
+    return {"version": 1, "config": config}
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/upcloud.py b/cloudinit/sources/helpers/upcloud.py
index 199baa58..e7b95a5e 100644
--- a/cloudinit/sources/helpers/upcloud.py
+++ b/cloudinit/sources/helpers/upcloud.py
@@ -169,7 +169,7 @@ def convert_to_network_config_v1(config):
         interface = {
             "type": "physical",
             "name": sysfs_name,
-            "mac_address": mac_address
+            "mac_address": mac_address,
         }
 
         subnets = []
@@ -182,10 +182,9 @@ def convert_to_network_config_v1(config):
 
     if config.get("dns"):
         LOG.debug("Setting DNS nameservers to %s", config.get("dns"))
-        nic_configs.append({
-            "type": "nameserver",
-            "address": config.get("dns")
-        })
+        nic_configs.append(
+            {"type": "nameserver", "address": config.get("dns")}
+        )
 
     return {"version": 1, "config": nic_configs}
 
@@ -216,8 +215,7 @@ def read_sysinfo():
     server_uuid = dmi.read_dmi_data("system-uuid")
     if server_uuid:
         LOG.debug(
-            "system identified via SMBIOS as UpCloud server: %s",
-            server_uuid
+            "system identified via SMBIOS as UpCloud server: %s", server_uuid
         )
     else:
         msg = (
diff --git a/cloudinit/sources/helpers/vmware/imc/boot_proto.py b/cloudinit/sources/helpers/vmware/imc/boot_proto.py
index 9a07eafa..a5c67bb7 100644
--- a/cloudinit/sources/helpers/vmware/imc/boot_proto.py
+++ b/cloudinit/sources/helpers/vmware/imc/boot_proto.py
@@ -9,7 +9,8 @@
 class BootProtoEnum(object):
     """Specifies the NIC Boot Settings."""
 
-    DHCP = 'dhcp'
-    STATIC = 'static'
+    DHCP = "dhcp"
+    STATIC = "static"
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/config.py b/cloudinit/sources/helpers/vmware/imc/config.py
index bdfab5a0..39dacee0 100644
--- a/cloudinit/sources/helpers/vmware/imc/config.py
+++ b/cloudinit/sources/helpers/vmware/imc/config.py
@@ -15,20 +15,20 @@ class Config(object):
     Specification file.
     """
 
-    CUSTOM_SCRIPT = 'CUSTOM-SCRIPT|SCRIPT-NAME'
-    DNS = 'DNS|NAMESERVER|'
-    DOMAINNAME = 'NETWORK|DOMAINNAME'
-    HOSTNAME = 'NETWORK|HOSTNAME'
-    MARKERID = 'MISC|MARKER-ID'
-    PASS = 'PASSWORD|-PASS'
-    RESETPASS = 'PASSWORD|RESET'
-    SUFFIX = 'DNS|SUFFIX|'
-    TIMEZONE = 'DATETIME|TIMEZONE'
-    UTC = 'DATETIME|UTC'
-    POST_GC_STATUS = 'MISC|POST-GC-STATUS'
-    DEFAULT_RUN_POST_SCRIPT = 'MISC|DEFAULT-RUN-POST-CUST-SCRIPT'
-    CLOUDINIT_META_DATA = 'CLOUDINIT|METADATA'
-    CLOUDINIT_USER_DATA = 'CLOUDINIT|USERDATA'
+    CUSTOM_SCRIPT = "CUSTOM-SCRIPT|SCRIPT-NAME"
+    DNS = "DNS|NAMESERVER|"
+    DOMAINNAME = "NETWORK|DOMAINNAME"
+    HOSTNAME = "NETWORK|HOSTNAME"
+    MARKERID = "MISC|MARKER-ID"
+    PASS = "PASSWORD|-PASS"
+    RESETPASS = "PASSWORD|RESET"
+    SUFFIX = "DNS|SUFFIX|"
+    TIMEZONE = "DATETIME|TIMEZONE"
+    UTC = "DATETIME|UTC"
+    POST_GC_STATUS = "MISC|POST-GC-STATUS"
+    DEFAULT_RUN_POST_SCRIPT = "MISC|DEFAULT-RUN-POST-CUST-SCRIPT"
+    CLOUDINIT_META_DATA = "CLOUDINIT|METADATA"
+    CLOUDINIT_USER_DATA = "CLOUDINIT|USERDATA"
 
     def __init__(self, configFile):
         self._configFile = configFile
@@ -84,8 +84,8 @@ class Config(object):
     def nics(self):
         """Return the list of associated NICs."""
         res = []
-        nics = self._configFile['NIC-CONFIG|NICS']
-        for nic in nics.split(','):
+        nics = self._configFile["NIC-CONFIG|NICS"]
+        for nic in nics.split(","):
             res.append(Nic(nic, self._configFile))
 
         return res
@@ -93,11 +93,11 @@ class Config(object):
     @property
     def reset_password(self):
         """Retreives if the root password needs to be reset."""
-        resetPass = self._configFile.get(Config.RESETPASS, 'no')
+        resetPass = self._configFile.get(Config.RESETPASS, "no")
         resetPass = resetPass.lower()
-        if resetPass not in ('yes', 'no'):
-            raise ValueError('ResetPassword value should be yes/no')
-        return resetPass == 'yes'
+        if resetPass not in ("yes", "no"):
+            raise ValueError("ResetPassword value should be yes/no")
+        return resetPass == "yes"
 
     @property
     def marker_id(self):
@@ -112,11 +112,11 @@ class Config(object):
     @property
     def post_gc_status(self):
         """Return whether to post guestinfo.gc.status VMX property."""
-        postGcStatus = self._configFile.get(Config.POST_GC_STATUS, 'no')
+        postGcStatus = self._configFile.get(Config.POST_GC_STATUS, "no")
         postGcStatus = postGcStatus.lower()
-        if postGcStatus not in ('yes', 'no'):
-            raise ValueError('PostGcStatus value should be yes/no')
-        return postGcStatus == 'yes'
+        if postGcStatus not in ("yes", "no"):
+            raise ValueError("PostGcStatus value should be yes/no")
+        return postGcStatus == "yes"
 
     @property
     def default_run_post_script(self):
@@ -125,12 +125,12 @@ class Config(object):
         is absent in VM Tools configuration
         """
         defaultRunPostScript = self._configFile.get(
-            Config.DEFAULT_RUN_POST_SCRIPT,
-            'no')
+            Config.DEFAULT_RUN_POST_SCRIPT, "no"
+        )
         defaultRunPostScript = defaultRunPostScript.lower()
-        if defaultRunPostScript not in ('yes', 'no'):
-            raise ValueError('defaultRunPostScript value should be yes/no')
-        return defaultRunPostScript == 'yes'
+        if defaultRunPostScript not in ("yes", "no"):
+            raise ValueError("defaultRunPostScript value should be yes/no")
+        return defaultRunPostScript == "yes"
 
     @property
     def meta_data_name(self):
@@ -142,4 +142,5 @@ class Config(object):
         """Return the name of cloud-init user data."""
         return self._configFile.get(Config.CLOUDINIT_USER_DATA, None)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/config_custom_script.py b/cloudinit/sources/helpers/vmware/imc/config_custom_script.py
index 2ab22de9..8240ea8f 100644
--- a/cloudinit/sources/helpers/vmware/imc/config_custom_script.py
+++ b/cloudinit/sources/helpers/vmware/imc/config_custom_script.py
@@ -9,8 +9,7 @@ import logging
 import os
 import stat
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
@@ -24,8 +23,7 @@ class CustomScriptConstant(object):
 
     # The user defined custom script
     CUSTOM_SCRIPT_NAME = "customize.sh"
-    CUSTOM_SCRIPT = os.path.join(CUSTOM_TMP_DIR,
-                                 CUSTOM_SCRIPT_NAME)
+    CUSTOM_SCRIPT = os.path.join(CUSTOM_TMP_DIR, CUSTOM_SCRIPT_NAME)
     POST_CUSTOM_PENDING_MARKER = "/.guest-customization-post-reboot-pending"
     # The cc_scripts_per_instance script to launch custom script
     POST_CUSTOM_SCRIPT_NAME = "post-customize-guest.sh"
@@ -39,22 +37,25 @@ class RunCustomScript(object):
 
     def prepare_script(self):
         if not os.path.exists(self.scriptpath):
-            raise CustomScriptNotFound("Script %s not found!! "
-                                       "Cannot execute custom script!"
-                                       % self.scriptpath)
+            raise CustomScriptNotFound(
+                "Script %s not found!! Cannot execute custom script!"
+                % self.scriptpath
+            )
 
         util.ensure_dir(CustomScriptConstant.CUSTOM_TMP_DIR)
 
-        LOG.debug("Copying custom script to %s",
-                  CustomScriptConstant.CUSTOM_SCRIPT)
+        LOG.debug(
+            "Copying custom script to %s", CustomScriptConstant.CUSTOM_SCRIPT
+        )
         util.copy(self.scriptpath, CustomScriptConstant.CUSTOM_SCRIPT)
 
         # Strip any CR characters from the decoded script
-        content = util.load_file(
-            CustomScriptConstant.CUSTOM_SCRIPT).replace("\r", "")
-        util.write_file(CustomScriptConstant.CUSTOM_SCRIPT,
-                        content,
-                        mode=0o544)
+        content = util.load_file(CustomScriptConstant.CUSTOM_SCRIPT).replace(
+            "\r", ""
+        )
+        util.write_file(
+            CustomScriptConstant.CUSTOM_SCRIPT, content, mode=0o544
+        )
 
 
 class PreCustomScript(RunCustomScript):
@@ -70,8 +71,8 @@ class PostCustomScript(RunCustomScript):
         super(PostCustomScript, self).__init__(scriptname, directory)
         self.ccScriptsDir = ccScriptsDir
         self.ccScriptPath = os.path.join(
-            ccScriptsDir,
-            CustomScriptConstant.POST_CUSTOM_SCRIPT_NAME)
+            ccScriptsDir, CustomScriptConstant.POST_CUSTOM_SCRIPT_NAME
+        )
 
     def execute(self):
         """
@@ -81,15 +82,17 @@ class PostCustomScript(RunCustomScript):
         """
         self.prepare_script()
 
-        LOG.debug("Copying post customize run script to %s",
-                  self.ccScriptPath)
+        LOG.debug("Copying post customize run script to %s", self.ccScriptPath)
         util.copy(
-            os.path.join(self.directory,
-                         CustomScriptConstant.POST_CUSTOM_SCRIPT_NAME),
-            self.ccScriptPath)
+            os.path.join(
+                self.directory, CustomScriptConstant.POST_CUSTOM_SCRIPT_NAME
+            ),
+            self.ccScriptPath,
+        )
         st = os.stat(self.ccScriptPath)
         os.chmod(self.ccScriptPath, st.st_mode | stat.S_IEXEC)
         LOG.info("Creating post customization pending marker")
         util.ensure_file(CustomScriptConstant.POST_CUSTOM_PENDING_MARKER)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/config_file.py b/cloudinit/sources/helpers/vmware/imc/config_file.py
index fc034c95..845294ec 100644
--- a/cloudinit/sources/helpers/vmware/imc/config_file.py
+++ b/cloudinit/sources/helpers/vmware/imc/config_file.py
@@ -35,7 +35,7 @@ class ConfigFile(ConfigSource, dict):
         key = key.strip()
         val = val.strip()
 
-        if key.startswith('-') or '|-' in key:
+        if key.startswith("-") or "|-" in key:
             canLog = False
         else:
             canLog = True
@@ -59,7 +59,7 @@ class ConfigFile(ConfigSource, dict):
         Keyword arguments:
         filename - The full path to the config file.
         """
-        logger.info('Parsing the config file %s.', filename)
+        logger.info("Parsing the config file %s.", filename)
 
         config = configparser.ConfigParser()
         config.optionxform = str
@@ -71,7 +71,7 @@ class ConfigFile(ConfigSource, dict):
             logger.debug("FOUND CATEGORY = '%s'", category)
 
             for (key, value) in config.items(category):
-                self._insertKey(category + '|' + key, value)
+                self._insertKey(category + "|" + key, value)
 
     def should_keep_current_value(self, key):
         """
@@ -115,4 +115,5 @@ class ConfigFile(ConfigSource, dict):
         """
         return len([key for key in self if key.startswith(prefix)])
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/config_namespace.py b/cloudinit/sources/helpers/vmware/imc/config_namespace.py
index 5899d8f7..3b3b2d5a 100644
--- a/cloudinit/sources/helpers/vmware/imc/config_namespace.py
+++ b/cloudinit/sources/helpers/vmware/imc/config_namespace.py
@@ -11,4 +11,5 @@ from .config_source import ConfigSource
 class ConfigNamespace(ConfigSource):
     """Specifies the Config Namespace."""
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/config_nic.py b/cloudinit/sources/helpers/vmware/imc/config_nic.py
index f5a0ebe4..df621f20 100644
--- a/cloudinit/sources/helpers/vmware/imc/config_nic.py
+++ b/cloudinit/sources/helpers/vmware/imc/config_nic.py
@@ -9,9 +9,8 @@ import logging
 import os
 import re
 
+from cloudinit import subp, util
 from cloudinit.net.network_state import mask_to_net_prefix
-from cloudinit import subp
-from cloudinit import util
 
 logger = logging.getLogger(__name__)
 
@@ -63,8 +62,10 @@ class NicConfigurator(object):
         if not primary_nics:
             return None
         elif len(primary_nics) > 1:
-            raise Exception('There can only be one primary nic',
-                            [nic.mac for nic in primary_nics])
+            raise Exception(
+                "There can only be one primary nic",
+                [nic.mac for nic in primary_nics],
+            )
         else:
             return primary_nics[0]
 
@@ -73,17 +74,17 @@ class NicConfigurator(object):
         Create the mac2Name dictionary
         The mac address(es) are in the lower case
         """
-        cmd = ['ip', 'addr', 'show']
+        cmd = ["ip", "addr", "show"]
         output, _err = subp.subp(cmd)
-        sections = re.split(r'\n\d+: ', '\n' + output)[1:]
+        sections = re.split(r"\n\d+: ", "\n" + output)[1:]
 
-        macPat = r'link/ether (([0-9A-Fa-f]{2}[:]){5}([0-9A-Fa-f]{2}))'
+        macPat = r"link/ether (([0-9A-Fa-f]{2}[:]){5}([0-9A-Fa-f]{2}))"
         for section in sections:
             match = re.search(macPat, section)
             if not match:  # Only keep info about nics
                 continue
             mac = match.group(1).lower()
-            name = section.split(':', 1)[0]
+            name = section.split(":", 1)[0]
             self.mac2Name[mac] = name
 
     def gen_one_nic(self, nic):
@@ -95,11 +96,11 @@ class NicConfigurator(object):
         mac = nic.mac.lower()
         name = self.mac2Name.get(mac)
         if not name:
-            raise ValueError('No known device has MACADDR: %s' % nic.mac)
+            raise ValueError("No known device has MACADDR: %s" % nic.mac)
 
         nics_cfg_list = []
 
-        cfg = {'type': 'physical', 'name': name, 'mac_address': mac}
+        cfg = {"type": "physical", "name": name, "mac_address": mac}
 
         subnet_list = []
         route_list = []
@@ -114,7 +115,7 @@ class NicConfigurator(object):
         subnet_list.extend(subnets)
         route_list.extend(routes)
 
-        cfg.update({'subnets': subnet_list})
+        cfg.update({"subnets": subnet_list})
 
         nics_cfg_list.append(cfg)
         if route_list:
@@ -135,17 +136,17 @@ class NicConfigurator(object):
         route_list = []
 
         if nic.onboot:
-            subnet.update({'control': 'auto'})
+            subnet.update({"control": "auto"})
 
         bootproto = nic.bootProto.lower()
-        if nic.ipv4_mode.lower() == 'disabled':
-            bootproto = 'manual'
+        if nic.ipv4_mode.lower() == "disabled":
+            bootproto = "manual"
 
-        if bootproto != 'static':
-            subnet.update({'type': 'dhcp'})
+        if bootproto != "static":
+            subnet.update({"type": "dhcp"})
             return ([subnet], route_list)
         else:
-            subnet.update({'type': 'static'})
+            subnet.update({"type": "static"})
 
         # Static Ipv4
         addrs = nic.staticIpv4
@@ -154,20 +155,21 @@ class NicConfigurator(object):
 
         v4 = addrs[0]
         if v4.ip:
-            subnet.update({'address': v4.ip})
+            subnet.update({"address": v4.ip})
         if v4.netmask:
-            subnet.update({'netmask': v4.netmask})
+            subnet.update({"netmask": v4.netmask})
 
         # Add the primary gateway
         if nic.primary and v4.gateways:
             self.ipv4PrimaryGateway = v4.gateways[0]
-            subnet.update({'gateway': self.ipv4PrimaryGateway})
+            subnet.update({"gateway": self.ipv4PrimaryGateway})
             return ([subnet], route_list)
 
         # Add routes if there is no primary nic
         if not self._primaryNic and v4.gateways:
             subnet.update(
-                {'routes': self.gen_ipv4_route(nic, v4.gateways, v4.netmask)})
+                {"routes": self.gen_ipv4_route(nic, v4.gateways, v4.netmask)}
+            )
 
         return ([subnet], route_list)
 
@@ -184,10 +186,14 @@ class NicConfigurator(object):
 
         for gateway in gateways:
             destination = "%s/%d" % (gen_subnet(gateway, netmask), cidr)
-            route_list.append({'destination': destination,
-                               'type': 'route',
-                               'gateway': gateway,
-                               'metric': 10000})
+            route_list.append(
+                {
+                    "destination": destination,
+                    "type": "route",
+                    "gateway": gateway,
+                    "metric": 10000,
+                }
+            )
 
         return route_list
 
@@ -208,9 +214,11 @@ class NicConfigurator(object):
         addrs = nic.staticIpv6
 
         for addr in addrs:
-            subnet = {'type': 'static6',
-                      'address': addr.ip,
-                      'netmask': addr.netmask}
+            subnet = {
+                "type": "static6",
+                "address": addr.ip,
+                "netmask": addr.netmask,
+            }
             subnet_list.append(subnet)
 
         # TODO: Add the primary gateway
@@ -226,9 +234,9 @@ class NicConfigurator(object):
         route_list = []
 
         for addr in addrs:
-            route_list.append({'type': 'route',
-                               'gateway': addr.gateway,
-                               'metric': 10000})
+            route_list.append(
+                {"type": "route", "gateway": addr.gateway, "metric": 10000}
+            )
 
         return route_list
 
@@ -246,7 +254,7 @@ class NicConfigurator(object):
         return nics_cfg_list
 
     def clear_dhcp(self):
-        logger.info('Clearing DHCP leases')
+        logger.info("Clearing DHCP leases")
 
         # Ignore the return code 1.
         subp.subp(["pkill", "dhclient"], rcs=[0, 1])
@@ -262,11 +270,12 @@ class NicConfigurator(object):
             logger.info("Debian OS not detected. Skipping the configure step")
             return
 
-        containingDir = '/etc/network'
+        containingDir = "/etc/network"
 
-        interfaceFile = os.path.join(containingDir, 'interfaces')
-        originalFile = os.path.join(containingDir,
-                                    'interfaces.before_vmware_customization')
+        interfaceFile = os.path.join(containingDir, "interfaces")
+        originalFile = os.path.join(
+            containingDir, "interfaces.before_vmware_customization"
+        )
 
         if not os.path.exists(originalFile) and os.path.exists(interfaceFile):
             os.rename(interfaceFile, originalFile)
@@ -278,8 +287,9 @@ class NicConfigurator(object):
             "source-directory /etc/network/interfaces.d",
         ]
 
-        util.write_file(interfaceFile, content='\n'.join(lines))
+        util.write_file(interfaceFile, content="\n".join(lines))
 
         self.clear_dhcp()
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/config_passwd.py b/cloudinit/sources/helpers/vmware/imc/config_passwd.py
index d16a7690..4d3967a1 100644
--- a/cloudinit/sources/helpers/vmware/imc/config_passwd.py
+++ b/cloudinit/sources/helpers/vmware/imc/config_passwd.py
@@ -9,8 +9,7 @@
 import logging
 import os
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 
 LOG = logging.getLogger(__name__)
 
@@ -20,6 +19,7 @@ class PasswordConfigurator(object):
     Class for changing configurations related to passwords in a VM. Includes
     setting and expiring passwords.
     """
+
     def configure(self, passwd, resetPasswd, distro):
         """
         Main method to perform all functionalities based on configuration file
@@ -28,25 +28,25 @@ class PasswordConfigurator(object):
         @param resetPasswd: boolean to determine if password needs to be reset.
         @return cfg: dict to be used by cloud-init set_passwd code.
         """
-        LOG.info('Starting password configuration')
+        LOG.info("Starting password configuration")
         if passwd:
             passwd = util.b64d(passwd)
         allRootUsers = []
-        for line in open('/etc/passwd', 'r'):
-            if line.split(':')[2] == '0':
-                allRootUsers.append(line.split(':')[0])
+        for line in open("/etc/passwd", "r"):
+            if line.split(":")[2] == "0":
+                allRootUsers.append(line.split(":")[0])
         # read shadow file and check for each user, if its uid0 or root.
         uidUsersList = []
-        for line in open('/etc/shadow', 'r'):
-            user = line.split(':')[0]
+        for line in open("/etc/shadow", "r"):
+            user = line.split(":")[0]
             if user in allRootUsers:
                 uidUsersList.append(user)
         if passwd:
-            LOG.info('Setting admin password')
-            distro.set_passwd('root', passwd)
+            LOG.info("Setting admin password")
+            distro.set_passwd("root", passwd)
         if resetPasswd:
             self.reset_password(uidUsersList)
-        LOG.info('Configure Password completed!')
+        LOG.info("Configure Password completed!")
 
     def reset_password(self, uidUserList):
         """
@@ -54,15 +54,19 @@ class PasswordConfigurator(object):
         not succeeded using passwd command. Log failure message otherwise.
         @param: list of users for which to expire password.
         """
-        LOG.info('Expiring password.')
+        LOG.info("Expiring password.")
         for user in uidUserList:
             try:
-                subp.subp(['passwd', '--expire', user])
+                subp.subp(["passwd", "--expire", user])
             except subp.ProcessExecutionError as e:
-                if os.path.exists('/usr/bin/chage'):
-                    subp.subp(['chage', '-d', '0', user])
+                if os.path.exists("/usr/bin/chage"):
+                    subp.subp(["chage", "-d", "0", user])
                 else:
-                    LOG.warning('Failed to expire password for %s with error: '
-                                '%s', user, e)
+                    LOG.warning(
+                        "Failed to expire password for %s with error: %s",
+                        user,
+                        e,
+                    )
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/config_source.py b/cloudinit/sources/helpers/vmware/imc/config_source.py
index 7ec06a9c..e99f9b43 100644
--- a/cloudinit/sources/helpers/vmware/imc/config_source.py
+++ b/cloudinit/sources/helpers/vmware/imc/config_source.py
@@ -9,4 +9,5 @@
 class ConfigSource(object):
     """Specifies a source for the Config Content."""
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/guestcust_error.py b/cloudinit/sources/helpers/vmware/imc/guestcust_error.py
index 96d839b8..eda84cfb 100644
--- a/cloudinit/sources/helpers/vmware/imc/guestcust_error.py
+++ b/cloudinit/sources/helpers/vmware/imc/guestcust_error.py
@@ -13,4 +13,5 @@ class GuestCustErrorEnum(object):
     GUESTCUST_ERROR_SCRIPT_DISABLED = 6
     GUESTCUST_ERROR_WRONG_META_FORMAT = 9
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/guestcust_event.py b/cloudinit/sources/helpers/vmware/imc/guestcust_event.py
index e84c1cb0..33169a7e 100644
--- a/cloudinit/sources/helpers/vmware/imc/guestcust_event.py
+++ b/cloudinit/sources/helpers/vmware/imc/guestcust_event.py
@@ -14,4 +14,5 @@ class GuestCustEventEnum(object):
     GUESTCUST_EVENT_ENABLE_NICS = 103
     GUESTCUST_EVENT_QUERY_NICS = 104
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/guestcust_state.py b/cloudinit/sources/helpers/vmware/imc/guestcust_state.py
index a8211dea..c74fbc8b 100644
--- a/cloudinit/sources/helpers/vmware/imc/guestcust_state.py
+++ b/cloudinit/sources/helpers/vmware/imc/guestcust_state.py
@@ -12,4 +12,5 @@ class GuestCustStateEnum(object):
     GUESTCUST_STATE_RUNNING = 4
     GUESTCUST_STATE_DONE = 5
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/guestcust_util.py b/cloudinit/sources/helpers/vmware/imc/guestcust_util.py
index d919f693..08763e62 100644
--- a/cloudinit/sources/helpers/vmware/imc/guestcust_util.py
+++ b/cloudinit/sources/helpers/vmware/imc/guestcust_util.py
@@ -73,7 +73,7 @@ def get_nics_to_enable(nicsfilepath):
     if not os.path.exists(nicsfilepath):
         return None
 
-    with open(nicsfilepath, 'r') as fp:
+    with open(nicsfilepath, "r") as fp:
         nics = fp.read(NICS_SIZE)
 
     return nics
@@ -95,7 +95,8 @@ def enable_nics(nics):
         (out, _err) = set_customization_status(
             GuestCustStateEnum.GUESTCUST_STATE_RUNNING,
             GuestCustEventEnum.GUESTCUST_EVENT_ENABLE_NICS,
-            nics)
+            nics,
+        )
         if not out:
             time.sleep(enableNicsWaitCount * enableNicsWaitSeconds)
             continue
@@ -108,32 +109,36 @@ def enable_nics(nics):
             (out, _err) = set_customization_status(
                 GuestCustStateEnum.GUESTCUST_STATE_RUNNING,
                 GuestCustEventEnum.GUESTCUST_EVENT_QUERY_NICS,
-                nics)
+                nics,
+            )
             if out and out == NICS_STATUS_CONNECTED:
                 logger.info("NICS are connected on %d second", count)
                 return
 
             time.sleep(enableNicsWaitSeconds)
 
-    logger.warning("Can't connect network interfaces after %d attempts",
-                   enableNicsWaitRetries)
+    logger.warning(
+        "Can't connect network interfaces after %d attempts",
+        enableNicsWaitRetries,
+    )
 
 
 def get_tools_config(section, key, defaultVal):
-    """ Return the value of [section] key from VMTools configuration.
+    """Return the value of [section] key from VMTools configuration.
 
-        @param section: String of section to read from VMTools config
-        @returns: String value from key in [section] or defaultVal if
-                  [section] is not present or vmware-toolbox-cmd is
-                  not installed.
+    @param section: String of section to read from VMTools config
+    @returns: String value from key in [section] or defaultVal if
+              [section] is not present or vmware-toolbox-cmd is
+              not installed.
     """
 
-    if not subp.which('vmware-toolbox-cmd'):
+    if not subp.which("vmware-toolbox-cmd"):
         logger.debug(
-            'vmware-toolbox-cmd not installed, returning default value')
+            "vmware-toolbox-cmd not installed, returning default value"
+        )
         return defaultVal
 
-    cmd = ['vmware-toolbox-cmd', 'config', 'get', section, key]
+    cmd = ["vmware-toolbox-cmd", "config", "get", section, key]
 
     try:
         (outText, _) = subp.subp(cmd)
@@ -141,22 +146,27 @@ def get_tools_config(section, key, defaultVal):
         if e.exit_code == 69:
             logger.debug(
                 "vmware-toolbox-cmd returned 69 (unavailable) for cmd: %s."
-                " Return default value: %s", " ".join(cmd), defaultVal)
+                " Return default value: %s",
+                " ".join(cmd),
+                defaultVal,
+            )
         else:
             logger.error("Failed running %s[%s]", cmd, e.exit_code)
             logger.exception(e)
         return defaultVal
 
     retValue = defaultVal
-    m = re.match(r'([^=]+)=(.*)', outText)
+    m = re.match(r"([^=]+)=(.*)", outText)
     if m:
         retValue = m.group(2).strip()
-        logger.debug("Get tools config: [%s] %s = %s",
-                     section, key, retValue)
+        logger.debug("Get tools config: [%s] %s = %s", section, key, retValue)
     else:
         logger.debug(
             "Tools config: [%s] %s is not found, return default value: %s",
-            section, key, retValue)
+            section,
+            key,
+            retValue,
+        )
 
     return retValue
 
diff --git a/cloudinit/sources/helpers/vmware/imc/ipv4_mode.py b/cloudinit/sources/helpers/vmware/imc/ipv4_mode.py
index d793bdeb..673204a0 100644
--- a/cloudinit/sources/helpers/vmware/imc/ipv4_mode.py
+++ b/cloudinit/sources/helpers/vmware/imc/ipv4_mode.py
@@ -18,18 +18,19 @@ class Ipv4ModeEnum(object):
 
     # The legacy mode which only allows dhcp/static based on whether IPv4
     # addresses list is empty or not
-    IPV4_MODE_BACKWARDS_COMPATIBLE = 'BACKWARDS_COMPATIBLE'
+    IPV4_MODE_BACKWARDS_COMPATIBLE = "BACKWARDS_COMPATIBLE"
 
     # IPv4 must use static address. Reserved for future use
-    IPV4_MODE_STATIC = 'STATIC'
+    IPV4_MODE_STATIC = "STATIC"
 
     # IPv4 must use DHCPv4. Reserved for future use
-    IPV4_MODE_DHCP = 'DHCP'
+    IPV4_MODE_DHCP = "DHCP"
 
     # IPv4 must be disabled
-    IPV4_MODE_DISABLED = 'DISABLED'
+    IPV4_MODE_DISABLED = "DISABLED"
 
     # IPv4 settings should be left untouched. Reserved for future use
-    IPV4_MODE_AS_IS = 'AS_IS'
+    IPV4_MODE_AS_IS = "AS_IS"
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/nic.py b/cloudinit/sources/helpers/vmware/imc/nic.py
index ef8f87f7..7b742d0f 100644
--- a/cloudinit/sources/helpers/vmware/imc/nic.py
+++ b/cloudinit/sources/helpers/vmware/imc/nic.py
@@ -20,7 +20,7 @@ class Nic(NicBase):
         self._configFile = configFile
 
     def _get(self, what):
-        return self._configFile.get(self.name + '|' + what, None)
+        return self._configFile.get(self.name + "|" + what, None)
 
     def _get_count_with_prefix(self, prefix):
         return self._configFile.get_count_with_prefix(self.name + prefix)
@@ -31,29 +31,29 @@ class Nic(NicBase):
 
     @property
     def mac(self):
-        return self._get('MACADDR').lower()
+        return self._get("MACADDR").lower()
 
     @property
     def primary(self):
-        value = self._get('PRIMARY')
+        value = self._get("PRIMARY")
         if value:
             value = value.lower()
-            return value == 'yes' or value == 'true'
+            return value == "yes" or value == "true"
         else:
             return False
 
     @property
     def onboot(self):
-        value = self._get('ONBOOT')
+        value = self._get("ONBOOT")
         if value:
             value = value.lower()
-            return value == 'yes' or value == 'true'
+            return value == "yes" or value == "true"
         else:
             return False
 
     @property
     def bootProto(self):
-        value = self._get('BOOTPROTO')
+        value = self._get("BOOTPROTO")
         if value:
             return value.lower()
         else:
@@ -61,7 +61,7 @@ class Nic(NicBase):
 
     @property
     def ipv4_mode(self):
-        value = self._get('IPv4_MODE')
+        value = self._get("IPv4_MODE")
         if value:
             return value.lower()
         else:
@@ -80,7 +80,7 @@ class Nic(NicBase):
 
     @property
     def staticIpv6(self):
-        cnt = self._get_count_with_prefix('|IPv6ADDR|')
+        cnt = self._get_count_with_prefix("|IPv6ADDR|")
 
         if not cnt:
             return None
@@ -100,17 +100,17 @@ class StaticIpv4Addr(StaticIpv4Base):
 
     @property
     def ip(self):
-        return self._nic._get('IPADDR')
+        return self._nic._get("IPADDR")
 
     @property
     def netmask(self):
-        return self._nic._get('NETMASK')
+        return self._nic._get("NETMASK")
 
     @property
     def gateways(self):
-        value = self._nic._get('GATEWAY')
+        value = self._nic._get("GATEWAY")
         if value:
-            return [x.strip() for x in value.split(',')]
+            return [x.strip() for x in value.split(",")]
         else:
             return None
 
@@ -124,14 +124,15 @@ class StaticIpv6Addr(StaticIpv6Base):
 
     @property
     def ip(self):
-        return self._nic._get('IPv6ADDR|' + str(self._index))
+        return self._nic._get("IPv6ADDR|" + str(self._index))
 
     @property
     def netmask(self):
-        return self._nic._get('IPv6NETMASK|' + str(self._index))
+        return self._nic._get("IPv6NETMASK|" + str(self._index))
 
     @property
     def gateway(self):
-        return self._nic._get('IPv6GATEWAY|' + str(self._index))
+        return self._nic._get("IPv6GATEWAY|" + str(self._index))
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vmware/imc/nic_base.py b/cloudinit/sources/helpers/vmware/imc/nic_base.py
index de7b866d..37d9602f 100644
--- a/cloudinit/sources/helpers/vmware/imc/nic_base.py
+++ b/cloudinit/sources/helpers/vmware/imc/nic_base.py
@@ -18,7 +18,7 @@ class NicBase(object):
         Retrieves the mac address of the nic
         @return (str) : the MACADDR setting
         """
-        raise NotImplementedError('MACADDR')
+        raise NotImplementedError("MACADDR")
 
     @property
     def primary(self):
@@ -29,7 +29,7 @@ class NicBase(object):
         be set.
         @return (bool): the PRIMARY setting
         """
-        raise NotImplementedError('PRIMARY')
+        raise NotImplementedError("PRIMARY")
 
     @property
     def onboot(self):
@@ -37,7 +37,7 @@ class NicBase(object):
         Retrieves whether the nic should be up at the boot time
         @return (bool) : the ONBOOT setting
         """
-        raise NotImplementedError('ONBOOT')
+        raise NotImplementedError("ONBOOT")
 
     @property
     def bootProto(self):
@@ -45,7 +45,7 @@ class NicBase(object):
         Retrieves the boot protocol of the nic
         @return (str): the BOOTPROTO setting, valid values: dhcp and static.
         """
-        raise NotImplementedError('BOOTPROTO')
+        raise NotImplementedError("BOOTPROTO")
 
     @property
     def ipv4_mode(self):
@@ -54,7 +54,7 @@ class NicBase(object):
         @return (str): the IPv4_MODE setting, valid values:
         backwards_compatible, static, dhcp, disabled, as_is
         """
-        raise NotImplementedError('IPv4_MODE')
+        raise NotImplementedError("IPv4_MODE")
 
     @property
     def staticIpv4(self):
@@ -62,7 +62,7 @@ class NicBase(object):
         Retrieves the static IPv4 configuration of the nic
         @return (StaticIpv4Base list): the static ipv4 setting
         """
-        raise NotImplementedError('Static IPv4')
+        raise NotImplementedError("Static IPv4")
 
     @property
     def staticIpv6(self):
@@ -70,7 +70,7 @@ class NicBase(object):
         Retrieves the IPv6 configuration of the nic
         @return (StaticIpv6Base list): the static ipv6 setting
         """
-        raise NotImplementedError('Static Ipv6')
+        raise NotImplementedError("Static Ipv6")
 
     def validate(self):
         """
@@ -78,7 +78,7 @@ class NicBase(object):
         For example, the staticIpv4 property is required and should not be
         empty when ipv4Mode is STATIC
         """
-        raise NotImplementedError('Check constraints on properties')
+        raise NotImplementedError("Check constraints on properties")
 
 
 class StaticIpv4Base(object):
@@ -93,7 +93,7 @@ class StaticIpv4Base(object):
         Retrieves the Ipv4 address
         @return (str): the IPADDR setting
         """
-        raise NotImplementedError('Ipv4 Address')
+        raise NotImplementedError("Ipv4 Address")
 
     @property
     def netmask(self):
@@ -101,7 +101,7 @@ class StaticIpv4Base(object):
         Retrieves the Ipv4 NETMASK setting
         @return (str): the NETMASK setting
         """
-        raise NotImplementedError('Ipv4 NETMASK')
+        raise NotImplementedError("Ipv4 NETMASK")
 
     @property
     def gateways(self):
@@ -109,7 +109,7 @@ class StaticIpv4Base(object):
         Retrieves the gateways on this Ipv4 subnet
         @return (str list): the GATEWAY setting
         """
-        raise NotImplementedError('Ipv4 GATEWAY')
+        raise NotImplementedError("Ipv4 GATEWAY")
 
 
 class StaticIpv6Base(object):
@@ -123,7 +123,7 @@ class StaticIpv6Base(object):
         Retrieves the Ipv6 address
         @return (str): the IPv6ADDR setting
         """
-        raise NotImplementedError('Ipv6 Address')
+        raise NotImplementedError("Ipv6 Address")
 
     @property
     def netmask(self):
@@ -131,7 +131,7 @@ class StaticIpv6Base(object):
         Retrieves the Ipv6 NETMASK setting
         @return (str): the IPv6NETMASK setting
         """
-        raise NotImplementedError('Ipv6 NETMASK')
+        raise NotImplementedError("Ipv6 NETMASK")
 
     @property
     def gateway(self):
@@ -139,6 +139,7 @@ class StaticIpv6Base(object):
         Retrieves the Ipv6 GATEWAY setting
         @return (str): the IPv6GATEWAY setting
         """
-        raise NotImplementedError('Ipv6 GATEWAY')
+        raise NotImplementedError("Ipv6 GATEWAY")
+
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/sources/helpers/vultr.py b/cloudinit/sources/helpers/vultr.py
index ad347bea..eb504eba 100644
--- a/cloudinit/sources/helpers/vultr.py
+++ b/cloudinit/sources/helpers/vultr.py
@@ -3,16 +3,12 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import json
+from functools import lru_cache
 
-from cloudinit import log as log
-from cloudinit import url_helper
 from cloudinit import dmi
-from cloudinit import util
-from cloudinit import net
-from cloudinit import netinfo
-from cloudinit import subp
+from cloudinit import log as log
+from cloudinit import net, netinfo, subp, url_helper, util
 from cloudinit.net.dhcp import EphemeralDHCPv4, NoDHCPLeaseError
-from functools import lru_cache
 
 # Get LOG
 LOG = log.getLogger(__name__)
@@ -41,21 +37,21 @@ def set_route():
     routes = netinfo.route_info()
 
     # If no tools exist and empty dict is returned
-    if 'ipv4' not in routes:
+    if "ipv4" not in routes:
         return
 
     # We only care about IPv4
-    routes = routes['ipv4']
+    routes = routes["ipv4"]
 
     # Searchable list
     dests = []
 
     # Parse each route into a more searchable format
     for route in routes:
-        dests.append(route['destination'])
+        dests.append(route["destination"])
 
-    gw_present = '100.64.0.0' in dests or '100.64.0.0/10' in dests
-    dest_present = '169.254.169.254' in dests
+    gw_present = "100.64.0.0" in dests or "100.64.0.0/10" in dests
+    dest_present = "169.254.169.254" in dests
 
     # If not IPv6 only (No link local)
     # or the route is already present
@@ -63,36 +59,32 @@ def set_route():
         return
 
     # Set metadata route
-    if subp.which('ip'):
-        subp.subp([
-            'ip',
-            'route',
-            'add',
-            '169.254.169.254/32',
-            'dev',
-            net.find_fallback_nic()
-        ])
-    elif subp.which('route'):
-        subp.subp([
-            'route',
-            'add',
-            '-net',
-            '169.254.169.254/32',
-            '100.64.0.1'
-        ])
+    if subp.which("ip"):
+        subp.subp(
+            [
+                "ip",
+                "route",
+                "add",
+                "169.254.169.254/32",
+                "dev",
+                net.find_fallback_nic(),
+            ]
+        )
+    elif subp.which("route"):
+        subp.subp(["route", "add", "-net", "169.254.169.254/32", "100.64.0.1"])
 
 
 # Read the system information from SMBIOS
 def get_sysinfo():
     return {
-        'manufacturer': dmi.read_dmi_data("system-manufacturer"),
-        'subid': dmi.read_dmi_data("system-serial-number")
+        "manufacturer": dmi.read_dmi_data("system-manufacturer"),
+        "subid": dmi.read_dmi_data("system-serial-number"),
     }
 
 
 # Assumes is Vultr is already checked
 def is_baremetal():
-    if get_sysinfo()['manufacturer'] != "Vultr":
+    if get_sysinfo()["manufacturer"] != "Vultr":
         return True
     return False
 
@@ -102,7 +94,7 @@ def is_vultr():
     # VC2, VDC, and HFC use DMI
     sysinfo = get_sysinfo()
 
-    if sysinfo['manufacturer'] == "Vultr":
+    if sysinfo["manufacturer"] == "Vultr":
         return True
 
     # Baremetal requires a kernel parameter
@@ -118,20 +110,20 @@ def read_metadata(url, timeout, retries, sec_between, agent):
 
     # Announce os details so we can handle non Vultr origin
     # images and provide correct vendordata generation.
-    headers = {
-        'Metadata-Token': 'cloudinit',
-        'User-Agent': agent
-    }
+    headers = {"Metadata-Token": "cloudinit", "User-Agent": agent}
 
-    response = url_helper.readurl(url,
-                                  timeout=timeout,
-                                  retries=retries,
-                                  headers=headers,
-                                  sec_between=sec_between)
+    response = url_helper.readurl(
+        url,
+        timeout=timeout,
+        retries=retries,
+        headers=headers,
+        sec_between=sec_between,
+    )
 
     if not response.ok():
-        raise RuntimeError("Failed to connect to %s: Code: %s" %
-                           url, response.code)
+        raise RuntimeError(
+            "Failed to connect to %s: Code: %s" % url, response.code
+        )
 
     return response.contents.decode()
 
@@ -156,95 +148,82 @@ def get_interface_name(mac):
 def generate_network_config(interfaces):
     network = {
         "version": 1,
-        "config": [
-            {
-                "type": "nameserver",
-                "address": [
-                    "108.61.10.10"
-                ]
-            }
-        ]
+        "config": [{"type": "nameserver", "address": ["108.61.10.10"]}],
     }
 
     # Prepare interface 0, public
     if len(interfaces) > 0:
         public = generate_public_network_interface(interfaces[0])
-        network['config'].append(public)
+        network["config"].append(public)
 
     # Prepare additional interfaces, private
     for i in range(1, len(interfaces)):
         private = generate_private_network_interface(interfaces[i])
-        network['config'].append(private)
+        network["config"].append(private)
 
     return network
 
 
 # Input Metadata and generate public network config part
 def generate_public_network_interface(interface):
-    interface_name = get_interface_name(interface['mac'])
+    interface_name = get_interface_name(interface["mac"])
     if not interface_name:
         raise RuntimeError(
-            "Interface: %s could not be found on the system" %
-            interface['mac'])
+            "Interface: %s could not be found on the system" % interface["mac"]
+        )
 
     netcfg = {
         "name": interface_name,
         "type": "physical",
-        "mac_address": interface['mac'],
+        "mac_address": interface["mac"],
         "accept-ra": 1,
         "subnets": [
-            {
-                "type": "dhcp",
-                "control": "auto"
-            },
-            {
-                "type": "ipv6_slaac",
-                "control": "auto"
-            },
-        ]
+            {"type": "dhcp", "control": "auto"},
+            {"type": "ipv6_slaac", "control": "auto"},
+        ],
     }
 
     # Options that may or may not be used
     if "mtu" in interface:
-        netcfg['mtu'] = interface['mtu']
+        netcfg["mtu"] = interface["mtu"]
 
     if "accept-ra" in interface:
-        netcfg['accept-ra'] = interface['accept-ra']
+        netcfg["accept-ra"] = interface["accept-ra"]
 
     if "routes" in interface:
-        netcfg['subnets'][0]['routes'] = interface['routes']
+        netcfg["subnets"][0]["routes"] = interface["routes"]
 
     # Check for additional IP's
-    additional_count = len(interface['ipv4']['additional'])
+    additional_count = len(interface["ipv4"]["additional"])
     if "ipv4" in interface and additional_count > 0:
-        for additional in interface['ipv4']['additional']:
+        for additional in interface["ipv4"]["additional"]:
             add = {
                 "type": "static",
                 "control": "auto",
-                "address": additional['address'],
-                "netmask": additional['netmask']
+                "address": additional["address"],
+                "netmask": additional["netmask"],
             }
 
             if "routes" in additional:
-                add['routes'] = additional['routes']
+                add["routes"] = additional["routes"]
 
-            netcfg['subnets'].append(add)
+            netcfg["subnets"].append(add)
 
     # Check for additional IPv6's
-    additional_count = len(interface['ipv6']['additional'])
+    additional_count = len(interface["ipv6"]["additional"])
     if "ipv6" in interface and additional_count > 0:
-        for additional in interface['ipv6']['additional']:
+        for additional in interface["ipv6"]["additional"]:
             add = {
                 "type": "static6",
                 "control": "auto",
-                "address": additional['address'],
-                "netmask": additional['netmask']
+                "address": additional["address"],
+                "netmask": additional["netmask"],
             }
 
             if "routes" in additional:
-                add['routes'] = additional['routes']
+                add["routes"] = additional["routes"]
 
-            netcfg['subnets'].append(add)
+            netcfg["subnets"].append(add)
 
     # Add config to template
     return netcfg
@@ -252,35 +231,35 @@ def generate_public_network_interface(interface):
 
 # Input Metadata and generate private network config part
 def generate_private_network_interface(interface):
-    interface_name = get_interface_name(interface['mac'])
+    interface_name = get_interface_name(interface["mac"])
     if not interface_name:
         raise RuntimeError(
-            "Interface: %s could not be found on the system" %
-            interface['mac'])
+            "Interface: %s could not be found on the system" % interface["mac"]
+        )
 
     netcfg = {
         "name": interface_name,
         "type": "physical",
-        "mac_address": interface['mac'],
+        "mac_address": interface["mac"],
         "subnets": [
             {
                 "type": "static",
                 "control": "auto",
-                "address": interface['ipv4']['address'],
-                "netmask": interface['ipv4']['netmask']
+                "address": interface["ipv4"]["address"],
+                "netmask": interface["ipv4"]["netmask"],
             }
-        ]
+        ],
     }
 
     # Options that may or may not be used
     if "mtu" in interface:
-        netcfg['mtu'] = interface['mtu']
+        netcfg["mtu"] = interface["mtu"]
 
     if "accept-ra" in interface:
-        netcfg['accept-ra'] = interface['accept-ra']
+        netcfg["accept-ra"] = interface["accept-ra"]
 
     if "routes" in interface:
-        netcfg['subnets'][0]['routes'] = interface['routes']
+        netcfg["subnets"][0]["routes"] = interface["routes"]
 
     return netcfg
 
@@ -288,12 +267,13 @@ def generate_private_network_interface(interface):
 # Make required adjustments to the network configs provided
 def add_interface_names(interfaces):
     for interface in interfaces:
-        interface_name = get_interface_name(interface['mac'])
+        interface_name = get_interface_name(interface["mac"])
         if not interface_name:
             raise RuntimeError(
-                "Interface: %s could not be found on the system" %
-                interface['mac'])
-        interface['name'] = interface_name
+                "Interface: %s could not be found on the system"
+                % interface["mac"]
+            )
+        interface["name"] = interface_name
 
     return interfaces
 
diff --git a/cloudinit/ssh_util.py b/cloudinit/ssh_util.py
index 33679dcc..ab4c63aa 100644
--- a/cloudinit/ssh_util.py
+++ b/cloudinit/ssh_util.py
@@ -60,14 +60,16 @@ _DISABLE_USER_SSH_EXIT = 142
 
 DISABLE_USER_OPTS = (
     "no-port-forwarding,no-agent-forwarding,"
-    "no-X11-forwarding,command=\"echo \'Please login as the user \\\"$USER\\\""
-    " rather than the user \\\"$DISABLE_USER\\\".\';echo;sleep 10;"
-    "exit " + str(_DISABLE_USER_SSH_EXIT) + "\"")
+    'no-X11-forwarding,command="echo \'Please login as the user \\"$USER\\"'
+    ' rather than the user \\"$DISABLE_USER\\".\';echo;sleep 10;'
+    "exit " + str(_DISABLE_USER_SSH_EXIT) + '"'
+)
 
 
 class AuthKeyLine(object):
-    def __init__(self, source, keytype=None, base64=None,
-                 comment=None, options=None):
+    def __init__(
+        self, source, keytype=None, base64=None, comment=None, options=None
+    ):
         self.base64 = base64
         self.comment = comment
         self.options = options
@@ -75,7 +77,7 @@ class AuthKeyLine(object):
         self.source = source
 
     def valid(self):
-        return (self.base64 and self.keytype)
+        return self.base64 and self.keytype
 
     def __str__(self):
         toks = []
@@ -90,7 +92,7 @@ class AuthKeyLine(object):
         if not toks:
             return self.source
         else:
-            return ' '.join(toks)
+            return " ".join(toks)
 
 
 class AuthKeyLineParser(object):
@@ -121,8 +123,7 @@ class AuthKeyLineParser(object):
         """
         quoted = False
         i = 0
-        while (i < len(ent) and
-               ((quoted) or (ent[i] not in (" ", "\t")))):
+        while i < len(ent) and ((quoted) or (ent[i] not in (" ", "\t"))):
             curc = ent[i]
             if i + 1 >= len(ent):
                 i = i + 1
@@ -143,7 +144,7 @@ class AuthKeyLineParser(object):
     def parse(self, src_line, options=None):
         # modeled after opensshes auth2-pubkey.c:user_key_allowed2
         line = src_line.rstrip("\r\n")
-        if line.startswith("#") or line.strip() == '':
+        if line.startswith("#") or line.strip() == "":
             return AuthKeyLine(src_line)
 
         def parse_ssh_key(ent):
@@ -174,8 +175,13 @@ class AuthKeyLineParser(object):
             except TypeError:
                 return AuthKeyLine(src_line)
 
-        return AuthKeyLine(src_line, keytype=keytype, base64=base64,
-                           comment=comment, options=options)
+        return AuthKeyLine(
+            src_line,
+            keytype=keytype,
+            base64=base64,
+            comment=comment,
+            options=options,
+        )
 
 
 def parse_authorized_keys(fnames):
@@ -218,15 +224,15 @@ def update_authorized_keys(old_entries, keys):
     lines = [str(b) for b in old_entries]
 
     # Ensure it ends with a newline
-    lines.append('')
-    return '\n'.join(lines)
+    lines.append("")
+    return "\n".join(lines)
 
 
 def users_ssh_info(username):
     pw_ent = pwd.getpwnam(username)
     if not pw_ent or not pw_ent.pw_dir:
         raise RuntimeError("Unable to get SSH info for user %r" % (username))
-    return (os.path.join(pw_ent.pw_dir, '.ssh'), pw_ent)
+    return (os.path.join(pw_ent.pw_dir, ".ssh"), pw_ent)
 
 
 def render_authorizedkeysfile_paths(value, homedir, username):
@@ -269,9 +275,14 @@ def check_permissions(username, current_path, full_path, is_file, strictmodes):
     # 1. owner must be either root or the user itself
     owner = util.get_owner(current_path)
     if strictmodes and owner != username and owner != "root":
-        LOG.debug("Path %s in %s must be own by user %s or"
-                  " by root, but instead is own by %s. Ignoring key.",
-                  current_path, full_path, username, owner)
+        LOG.debug(
+            "Path %s in %s must be own by user %s or"
+            " by root, but instead is own by %s. Ignoring key.",
+            current_path,
+            full_path,
+            username,
+            owner,
+        )
         return False
 
     parent_permission = util.get_permissions(current_path)
@@ -291,17 +302,24 @@ def check_permissions(username, current_path, full_path, is_file, strictmodes):
             minimal_permissions &= 0o007
 
     if parent_permission & minimal_permissions == 0:
-        LOG.debug("Path %s in %s must be accessible by user %s,"
-                  " check its permissions",
-                  current_path, full_path, username)
+        LOG.debug(
+            "Path %s in %s must be accessible by user %s,"
+            " check its permissions",
+            current_path,
+            full_path,
+            username,
+        )
         return False
 
     # 3. no write permission (w) is given to group and world users (022)
     # Group and world user can still have +rx.
     if strictmodes and parent_permission & 0o022 != 0:
-        LOG.debug("Path %s in %s must not give write"
-                  "permission to group or world users. Ignoring key.",
-                  current_path, full_path)
+        LOG.debug(
+            "Path %s in %s must not give write"
+            "permission to group or world users. Ignoring key.",
+            current_path,
+            full_path,
+        )
         return False
 
     return True
@@ -326,17 +344,20 @@ def check_create_path(username, filename, strictmodes):
             if os.path.islink(parent_folder):
                 LOG.debug(
                     "Invalid directory. Symlink exists in path: %s",
-                    parent_folder)
+                    parent_folder,
+                )
                 return False
 
             if os.path.isfile(parent_folder):
                 LOG.debug(
-                    "Invalid directory. File exists in path: %s",
-                    parent_folder)
+                    "Invalid directory. File exists in path: %s", parent_folder
+                )
                 return False
 
-            if (home_folder.startswith(parent_folder) or
-                    parent_folder == user_pwent.pw_dir):
+            if (
+                home_folder.startswith(parent_folder)
+                or parent_folder == user_pwent.pw_dir
+            ):
                 continue
 
             if not os.path.exists(parent_folder):
@@ -354,8 +375,9 @@ def check_create_path(username, filename, strictmodes):
                     os.makedirs(parent_folder, mode=mode, exist_ok=True)
                     util.chownbyid(parent_folder, uid, gid)
 
-            permissions = check_permissions(username, parent_folder,
-                                            filename, False, strictmodes)
+            permissions = check_permissions(
+                username, parent_folder, filename, False, strictmodes
+            )
             if not permissions:
                 return False
 
@@ -367,11 +389,12 @@ def check_create_path(username, filename, strictmodes):
         if not os.path.exists(filename):
             # if file does not exist: we need to create it, since the
             # folders at this point exist and have right permissions
-            util.write_file(filename, '', mode=0o600, ensure_dir_exists=True)
+            util.write_file(filename, "", mode=0o600, ensure_dir_exists=True)
             util.chownbyid(filename, user_pwent.pw_uid, user_pwent.pw_gid)
 
-        permissions = check_permissions(username, filename,
-                                        filename, True, strictmodes)
+        permissions = check_permissions(
+            username, filename, filename, True, strictmodes
+        )
         if not permissions:
             return False
     except (IOError, OSError) as e:
@@ -383,34 +406,44 @@ def check_create_path(username, filename, strictmodes):
 
 def extract_authorized_keys(username, sshd_cfg_file=DEF_SSHD_CFG):
     (ssh_dir, pw_ent) = users_ssh_info(username)
-    default_authorizedkeys_file = os.path.join(ssh_dir, 'authorized_keys')
+    default_authorizedkeys_file = os.path.join(ssh_dir, "authorized_keys")
     user_authorizedkeys_file = default_authorizedkeys_file
     auth_key_fns = []
     with util.SeLinuxGuard(ssh_dir, recursive=True):
         try:
             ssh_cfg = parse_ssh_config_map(sshd_cfg_file)
-            key_paths = ssh_cfg.get("authorizedkeysfile",
-                                    "%h/.ssh/authorized_keys")
+            key_paths = ssh_cfg.get(
+                "authorizedkeysfile", "%h/.ssh/authorized_keys"
+            )
             strictmodes = ssh_cfg.get("strictmodes", "yes")
             auth_key_fns = render_authorizedkeysfile_paths(
-                key_paths, pw_ent.pw_dir, username)
+                key_paths, pw_ent.pw_dir, username
+            )
 
         except (IOError, OSError):
             # Give up and use a default key filename
             auth_key_fns[0] = default_authorizedkeys_file
-            util.logexc(LOG, "Failed extracting 'AuthorizedKeysFile' in SSH "
-                        "config from %r, using 'AuthorizedKeysFile' file "
-                        "%r instead", DEF_SSHD_CFG, auth_key_fns[0])
+            util.logexc(
+                LOG,
+                "Failed extracting 'AuthorizedKeysFile' in SSH "
+                "config from %r, using 'AuthorizedKeysFile' file "
+                "%r instead",
+                DEF_SSHD_CFG,
+                auth_key_fns[0],
+            )
 
     # check if one of the keys is the user's one and has the right permissions
     for key_path, auth_key_fn in zip(key_paths.split(), auth_key_fns):
-        if any([
-            '%u' in key_path,
-            '%h' in key_path,
-            auth_key_fn.startswith('{}/'.format(pw_ent.pw_dir))
-        ]):
-            permissions_ok = check_create_path(username, auth_key_fn,
-                                               strictmodes == "yes")
+        if any(
+            [
+                "%u" in key_path,
+                "%h" in key_path,
+                auth_key_fn.startswith("{}/".format(pw_ent.pw_dir)),
+            ]
+        ):
+            permissions_ok = check_create_path(
+                username, auth_key_fn, strictmodes == "yes"
+            )
             if permissions_ok:
                 user_authorizedkeys_file = auth_key_fn
                 break
@@ -418,11 +451,13 @@ def extract_authorized_keys(username, sshd_cfg_file=DEF_SSHD_CFG):
     if user_authorizedkeys_file != default_authorizedkeys_file:
         LOG.debug(
             "AuthorizedKeysFile has an user-specific authorized_keys, "
-            "using %s", user_authorizedkeys_file)
+            "using %s",
+            user_authorizedkeys_file,
+        )
 
     return (
         user_authorizedkeys_file,
-        parse_authorized_keys([user_authorizedkeys_file])
+        parse_authorized_keys([user_authorizedkeys_file]),
     )
 
 
@@ -485,11 +520,13 @@ def parse_ssh_config_lines(lines):
             key, val = line.split(None, 1)
         except ValueError:
             try:
-                key, val = line.split('=', 1)
+                key, val = line.split("=", 1)
             except ValueError:
                 LOG.debug(
-                    "sshd_config: option \"%s\" has no key/value pair,"
-                    " skipping it", line)
+                    'sshd_config: option "%s" has no key/value pair,'
+                    " skipping it",
+                    line,
+                )
                 continue
         ret.append(SshdConfigLine(line, key, val))
     return ret
@@ -516,9 +553,10 @@ def update_ssh_config(updates, fname=DEF_SSHD_CFG):
     changed = update_ssh_config_lines(lines=lines, updates=updates)
     if changed:
         util.write_file(
-            fname, "\n".join(
-                [str(line) for line in lines]
-            ) + "\n", preserve_mode=True)
+            fname,
+            "\n".join([str(line) for line in lines]) + "\n",
+            preserve_mode=True,
+        )
     return len(changed) != 0
 
 
@@ -542,12 +580,18 @@ def update_ssh_config_lines(lines, updates):
             value = updates[key]
             found.add(key)
             if line.value == value:
-                LOG.debug("line %d: option %s already set to %s",
-                          i, key, value)
+                LOG.debug(
+                    "line %d: option %s already set to %s", i, key, value
+                )
             else:
                 changed.append(key)
-                LOG.debug("line %d: option %s updated %s -> %s", i,
-                          key, line.value, value)
+                LOG.debug(
+                    "line %d: option %s updated %s -> %s",
+                    i,
+                    key,
+                    line.value,
+                    value,
+                )
                 line.value = value
 
     if len(found) != len(updates):
@@ -555,9 +599,11 @@ def update_ssh_config_lines(lines, updates):
             if key in found:
                 continue
             changed.append(key)
-            lines.append(SshdConfigLine('', key, value))
-            LOG.debug("line %d: option %s added with %s",
-                      len(lines), key, value)
+            lines.append(SshdConfigLine("", key, value))
+            LOG.debug(
+                "line %d: option %s added with %s", len(lines), key, value
+            )
     return changed
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/stages.py b/cloudinit/stages.py
index 731b2982..b1a6bc49 100644
--- a/cloudinit/stages.py
+++ b/cloudinit/stages.py
@@ -11,10 +11,10 @@ import sys
 from collections import namedtuple
 from typing import Dict, Set  # noqa: F401
 
-from cloudinit.settings import (
-    FREQUENCIES, CLOUD_CONFIG, PER_INSTANCE, PER_ONCE, RUN_CLOUD_CONFIG)
-
-from cloudinit import handlers
+from cloudinit import cloud, config, distros, handlers, helpers, importer
+from cloudinit import log as logging
+from cloudinit import net, sources, type_utils, util
+from cloudinit.event import EventScope, EventType, userdata_to_events
 
 # Default handlers (used if not overridden)
 from cloudinit.handlers.boot_hook import BootHookPartHandler
@@ -22,26 +22,16 @@ from cloudinit.handlers.cloud_config import CloudConfigPartHandler
 from cloudinit.handlers.jinja_template import JinjaTemplatePartHandler
 from cloudinit.handlers.shell_script import ShellScriptPartHandler
 from cloudinit.handlers.upstart_job import UpstartJobPartHandler
-
-from cloudinit.event import (
-    EventScope,
-    EventType,
-    userdata_to_events,
-)
-from cloudinit.sources import NetworkConfigSource
-
-from cloudinit import cloud
-from cloudinit import config
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import importer
-from cloudinit import log as logging
-from cloudinit import net
 from cloudinit.net import cmdline
 from cloudinit.reporting import events
-from cloudinit import sources
-from cloudinit import type_utils
-from cloudinit import util
+from cloudinit.settings import (
+    CLOUD_CONFIG,
+    FREQUENCIES,
+    PER_INSTANCE,
+    PER_ONCE,
+    RUN_CLOUD_CONFIG,
+)
+from cloudinit.sources import NetworkConfigSource
 
 LOG = logging.getLogger(__name__)
 
@@ -53,7 +43,7 @@ def update_event_enabled(
     datasource: sources.DataSource,
     cfg: dict,
     event_source_type: EventType,
-    scope: EventScope = None
+    scope: EventScope = None,
 ) -> bool:
     """Determine if a particular EventType is enabled.
 
@@ -67,14 +57,20 @@ def update_event_enabled(
     case, we only have the data source's `default_update_events`,
     so an event that should be enabled in userdata may be denied.
     """
-    default_events = datasource.default_update_events  # type: Dict[EventScope, Set[EventType]]    # noqa: E501
-    user_events = userdata_to_events(cfg.get('updates', {}))  # type: Dict[EventScope, Set[EventType]]  # noqa: E501
+    default_events = (
+        datasource.default_update_events
+    )  # type: Dict[EventScope, Set[EventType]]
+    user_events = userdata_to_events(
+        cfg.get("updates", {})
+    )  # type: Dict[EventScope, Set[EventType]]
     # A value in the first will override a value in the second
-    allowed = util.mergemanydict([
-        copy.deepcopy(user_events),
-        copy.deepcopy(default_events),
-    ])
-    LOG.debug('Allowed events: %s', allowed)
+    allowed = util.mergemanydict(
+        [
+            copy.deepcopy(user_events),
+            copy.deepcopy(default_events),
+        ]
+    )
+    LOG.debug("Allowed events: %s", allowed)
 
     if not scope:
         scopes = allowed.keys()
@@ -85,14 +81,14 @@ def update_event_enabled(
     for evt_scope in scopes:
         if event_source_type in allowed.get(evt_scope, []):
             LOG.debug(
-                'Event Allowed: scope=%s EventType=%s',
-                evt_scope.value, event_source_type
+                "Event Allowed: scope=%s EventType=%s",
+                evt_scope.value,
+                event_source_type,
             )
             return True
 
     LOG.debug(
-        'Event Denied: scopes=%s EventType=%s',
-        scope_values, event_source_type
+        "Event Denied: scopes=%s EventType=%s", scope_values, event_source_type
     )
     return False
 
@@ -114,8 +110,10 @@ class Init(object):
 
         if reporter is None:
             reporter = events.ReportEventStack(
-                name="init-reporter", description="init-desc",
-                reporting_enabled=False)
+                name="init-reporter",
+                description="init-desc",
+                reporting_enabled=False,
+            )
         self.reporter = reporter
 
     def _reset(self, reset_ds=False):
@@ -131,8 +129,8 @@ class Init(object):
     def distro(self):
         if not self._distro:
             # Try to find the right class to use
-            system_config = self._extract_cfg('system')
-            distro_name = system_config.pop('distro', 'ubuntu')
+            system_config = self._extract_cfg("system")
+            distro_name = system_config.pop("distro", "ubuntu")
             distro_cls = distros.fetch(distro_name)
             LOG.debug("Using distro class %s", distro_cls)
             self._distro = distro_cls(distro_name, system_config, self.paths)
@@ -146,19 +144,19 @@ class Init(object):
 
     @property
     def cfg(self):
-        return self._extract_cfg('restricted')
+        return self._extract_cfg("restricted")
 
     def _extract_cfg(self, restriction):
         # Ensure actually read
         self.read_cfg()
         # Nobody gets the real config
         ocfg = copy.deepcopy(self._cfg)
-        if restriction == 'restricted':
-            ocfg.pop('system_info', None)
-        elif restriction == 'system':
-            ocfg = util.get_cfg_by_path(ocfg, ('system_info',), {})
-        elif restriction == 'paths':
-            ocfg = util.get_cfg_by_path(ocfg, ('system_info', 'paths'), {})
+        if restriction == "restricted":
+            ocfg.pop("system_info", None)
+        elif restriction == "system":
+            ocfg = util.get_cfg_by_path(ocfg, ("system_info",), {})
+        elif restriction == "paths":
+            ocfg = util.get_cfg_by_path(ocfg, ("system_info", "paths"), {})
         if not isinstance(ocfg, (dict)):
             ocfg = {}
         return ocfg
@@ -166,7 +164,7 @@ class Init(object):
     @property
     def paths(self):
         if not self._paths:
-            path_info = self._extract_cfg('paths')
+            path_info = self._extract_cfg("paths")
             self._paths = helpers.Paths(path_info, self.datasource)
         return self._paths
 
@@ -175,17 +173,17 @@ class Init(object):
         run_dir = self.paths.run_dir
         initial_dirs = [
             c_dir,
-            os.path.join(c_dir, 'scripts'),
-            os.path.join(c_dir, 'scripts', 'per-instance'),
-            os.path.join(c_dir, 'scripts', 'per-once'),
-            os.path.join(c_dir, 'scripts', 'per-boot'),
-            os.path.join(c_dir, 'scripts', 'vendor'),
-            os.path.join(c_dir, 'seed'),
-            os.path.join(c_dir, 'instances'),
-            os.path.join(c_dir, 'handlers'),
-            os.path.join(c_dir, 'sem'),
-            os.path.join(c_dir, 'data'),
-            os.path.join(run_dir, 'sem'),
+            os.path.join(c_dir, "scripts"),
+            os.path.join(c_dir, "scripts", "per-instance"),
+            os.path.join(c_dir, "scripts", "per-once"),
+            os.path.join(c_dir, "scripts", "per-boot"),
+            os.path.join(c_dir, "scripts", "vendor"),
+            os.path.join(c_dir, "seed"),
+            os.path.join(c_dir, "instances"),
+            os.path.join(c_dir, "handlers"),
+            os.path.join(c_dir, "sem"),
+            os.path.join(c_dir, "data"),
+            os.path.join(run_dir, "sem"),
         ]
         return initial_dirs
 
@@ -202,10 +200,10 @@ class Init(object):
 
     def _initialize_filesystem(self):
         util.ensure_dirs(self._initial_subdirs())
-        log_file = util.get_cfg_option_str(self.cfg, 'def_log_file')
+        log_file = util.get_cfg_option_str(self.cfg, "def_log_file")
         if log_file:
             util.ensure_file(log_file, mode=0o640, preserve_mode=True)
-            perms = self.cfg.get('syslog_fix_perms')
+            perms = self.cfg.get("syslog_fix_perms")
             if not perms:
                 perms = {}
             if not isinstance(perms, list):
@@ -220,8 +218,12 @@ class Init(object):
                 except OSError as e:
                     error = e
 
-            LOG.warning("Failed changing perms on '%s'. tried: %s. %s",
-                        log_file, ','.join(perms), error)
+            LOG.warning(
+                "Failed changing perms on '%s'. tried: %s. %s",
+                log_file,
+                ",".join(perms),
+                error,
+            )
 
     def read_cfg(self, extra_fns=None):
         # None check so that we don't keep on re-loading if empty
@@ -231,37 +233,41 @@ class Init(object):
 
     def _read_cfg(self, extra_fns):
         no_cfg_paths = helpers.Paths({}, self.datasource)
-        merger = helpers.ConfigMerger(paths=no_cfg_paths,
-                                      datasource=self.datasource,
-                                      additional_fns=extra_fns,
-                                      base_cfg=fetch_base_config())
+        merger = helpers.ConfigMerger(
+            paths=no_cfg_paths,
+            datasource=self.datasource,
+            additional_fns=extra_fns,
+            base_cfg=fetch_base_config(),
+        )
         return merger.cfg
 
     def _restore_from_cache(self):
         # We try to restore from a current link and static path
         # by using the instance link, if purge_cache was called
         # the file wont exist.
-        return _pkl_load(self.paths.get_ipath_cur('obj_pkl'))
+        return _pkl_load(self.paths.get_ipath_cur("obj_pkl"))
 
     def _write_to_cache(self):
         if self.datasource is NULL_DATA_SOURCE:
             return False
-        if util.get_cfg_option_bool(self.cfg, 'manual_cache_clean', False):
+        if util.get_cfg_option_bool(self.cfg, "manual_cache_clean", False):
             # The empty file in instance/ dir indicates manual cleaning,
             # and can be read by ds-identify.
             util.write_file(
                 self.paths.get_ipath_cur("manual_clean_marker"),
-                omode="w", content="")
+                omode="w",
+                content="",
+            )
         return _pkl_store(self.datasource, self.paths.get_ipath_cur("obj_pkl"))
 
     def _get_datasources(self):
         # Any config provided???
-        pkg_list = self.cfg.get('datasource_pkg_list') or []
+        pkg_list = self.cfg.get("datasource_pkg_list") or []
         # Add the defaults at the end
-        for n in ['', type_utils.obj_name(sources)]:
+        for n in ["", type_utils.obj_name(sources)]:
             if n not in pkg_list:
                 pkg_list.append(n)
-        cfg_list = self.cfg.get('datasource_list') or []
+        cfg_list = self.cfg.get("datasource_list") or []
         return (cfg_list, pkg_list)
 
     def _restore_from_checked_cache(self, existing):
@@ -272,7 +278,7 @@ class Init(object):
         if not ds:
             return (None, "no cache found")
 
-        run_iid_fn = self.paths.get_runpath('instance_id')
+        run_iid_fn = self.paths.get_runpath("instance_id")
         if os.path.exists(run_iid_fn):
             run_iid = util.load_file(run_iid_fn).strip()
         else:
@@ -283,8 +289,9 @@ class Init(object):
         elif existing == "trust":
             return (ds, "restored from cache: %s" % ds)
         else:
-            if (hasattr(ds, 'check_instance_id') and
-                    ds.check_instance_id(self.cfg)):
+            if hasattr(ds, "check_instance_id") and ds.check_instance_id(
+                self.cfg
+            ):
                 return (ds, "restored from checked cache: %s" % ds)
             else:
                 return (None, "cache invalid in datasource: %s" % ds)
@@ -294,9 +301,10 @@ class Init(object):
             return self.datasource
 
         with events.ReportEventStack(
-                name="check-cache",
-                description="attempting to read from cache [%s]" % existing,
-                parent=self.reporter) as myrep:
+            name="check-cache",
+            description="attempting to read from cache [%s]" % existing,
+            parent=self.reporter,
+        ) as myrep:
 
             ds, desc = self._restore_from_checked_cache(existing)
             myrep.description = desc
@@ -308,12 +316,15 @@ class Init(object):
             (cfg_list, pkg_list) = self._get_datasources()
             # Deep copy so that user-data handlers can not modify
             # (which will affect user-data handlers down the line...)
-            (ds, dsname) = sources.find_source(self.cfg,
-                                               self.distro,
-                                               self.paths,
-                                               copy.deepcopy(self.ds_deps),
-                                               cfg_list,
-                                               pkg_list, self.reporter)
+            (ds, dsname) = sources.find_source(
+                self.cfg,
+                self.distro,
+                self.paths,
+                copy.deepcopy(self.ds_deps),
+                cfg_list,
+                pkg_list,
+                self.reporter,
+            )
             LOG.info("Loaded datasource %s - %s", dsname, ds)
         self.datasource = ds  # type: sources.DataSource
         # Ensure we adjust our path members datasource
@@ -322,7 +333,7 @@ class Init(object):
         return ds
 
     def _get_instance_subdirs(self):
-        return ['handlers', 'scripts', 'sem']
+        return ["handlers", "scripts", "sem"]
 
     def _get_ipath(self, subname=None):
         # Force a check to see if anything
@@ -330,8 +341,10 @@ class Init(object):
         # then a datasource has not been assigned...
         instance_dir = self.paths.get_ipath(subname)
         if not instance_dir:
-            raise RuntimeError(("No instance directory is available."
-                                " Has a datasource been fetched??"))
+            raise RuntimeError(
+                "No instance directory is available."
+                " Has a datasource been fetched??"
+            )
         return instance_dir
 
     def _reflect_cur_instance(self):
@@ -349,12 +362,12 @@ class Init(object):
 
         # Write out information on what is being used for the current instance
         # and what may have been used for a previous instance...
-        dp = self.paths.get_cpath('data')
+        dp = self.paths.get_cpath("data")
 
         # Write what the datasource was and is..
         ds = "%s: %s" % (type_utils.obj_name(self.datasource), self.datasource)
         previous_ds = None
-        ds_fn = os.path.join(idir, 'datasource')
+        ds_fn = os.path.join(idir, "datasource")
         try:
             previous_ds = util.load_file(ds_fn).strip()
         except Exception:
@@ -362,18 +375,20 @@ class Init(object):
         if not previous_ds:
             previous_ds = ds
         util.write_file(ds_fn, "%s\n" % ds)
-        util.write_file(os.path.join(dp, 'previous-datasource'),
-                        "%s\n" % (previous_ds))
+        util.write_file(
+            os.path.join(dp, "previous-datasource"), "%s\n" % (previous_ds)
+        )
 
         # What the instance id was and is...
         iid = self.datasource.get_instance_id()
-        iid_fn = os.path.join(dp, 'instance-id')
+        iid_fn = os.path.join(dp, "instance-id")
 
         previous_iid = self.previous_iid()
         util.write_file(iid_fn, "%s\n" % iid)
-        util.write_file(self.paths.get_runpath('instance_id'), "%s\n" % iid)
-        util.write_file(os.path.join(dp, 'previous-instance-id'),
-                        "%s\n" % (previous_iid))
+        util.write_file(self.paths.get_runpath("instance_id"), "%s\n" % iid)
+        util.write_file(
+            os.path.join(dp, "previous-instance-id"), "%s\n" % (previous_iid)
+        )
 
         self._write_to_cache()
         # Ensure needed components are regenerated
@@ -386,8 +401,8 @@ class Init(object):
         if self._previous_iid is not None:
             return self._previous_iid
 
-        dp = self.paths.get_cpath('data')
-        iid_fn = os.path.join(dp, 'instance-id')
+        dp = self.paths.get_cpath("data")
+        iid_fn = os.path.join(dp, "instance-id")
         try:
             self._previous_iid = util.load_file(iid_fn).strip()
         except Exception:
@@ -403,8 +418,10 @@ class Init(object):
         even on first boot.
         """
         previous = self.previous_iid()
-        ret = (previous == NO_PREVIOUS_INSTANCE_ID or
-               previous != self.datasource.get_instance_id())
+        ret = (
+            previous == NO_PREVIOUS_INSTANCE_ID
+            or previous != self.datasource.get_instance_id()
+        )
         return ret
 
     def fetch(self, existing="check"):
@@ -415,54 +432,64 @@ class Init(object):
 
     def cloudify(self):
         # Form the needed options to cloudify our members
-        return cloud.Cloud(self.datasource,
-                           self.paths, self.cfg,
-                           self.distro, helpers.Runners(self.paths),
-                           reporter=self.reporter)
+        return cloud.Cloud(
+            self.datasource,
+            self.paths,
+            self.cfg,
+            self.distro,
+            helpers.Runners(self.paths),
+            reporter=self.reporter,
+        )
 
     def update(self):
-        self._store_rawdata(self.datasource.get_userdata_raw(),
-                            'userdata')
-        self._store_processeddata(self.datasource.get_userdata(),
-                                  'userdata')
-        self._store_raw_vendordata(self.datasource.get_vendordata_raw(),
-                                   'vendordata')
-        self._store_processeddata(self.datasource.get_vendordata(),
-                                  'vendordata')
-        self._store_raw_vendordata(self.datasource.get_vendordata2_raw(),
-                                   'vendordata2')
-        self._store_processeddata(self.datasource.get_vendordata2(),
-                                  'vendordata2')
+        self._store_rawdata(self.datasource.get_userdata_raw(), "userdata")
+        self._store_processeddata(self.datasource.get_userdata(), "userdata")
+        self._store_raw_vendordata(
+            self.datasource.get_vendordata_raw(), "vendordata"
+        )
+        self._store_processeddata(
+            self.datasource.get_vendordata(), "vendordata"
+        )
+        self._store_raw_vendordata(
+            self.datasource.get_vendordata2_raw(), "vendordata2"
+        )
+        self._store_processeddata(
+            self.datasource.get_vendordata2(), "vendordata2"
+        )
 
     def setup_datasource(self):
-        with events.ReportEventStack("setup-datasource",
-                                     "setting up datasource",
-                                     parent=self.reporter):
+        with events.ReportEventStack(
+            "setup-datasource", "setting up datasource", parent=self.reporter
+        ):
             if self.datasource is None:
                 raise RuntimeError("Datasource is None, cannot setup.")
             self.datasource.setup(is_new_instance=self.is_new_instance())
 
     def activate_datasource(self):
-        with events.ReportEventStack("activate-datasource",
-                                     "activating datasource",
-                                     parent=self.reporter):
+        with events.ReportEventStack(
+            "activate-datasource",
+            "activating datasource",
+            parent=self.reporter,
+        ):
             if self.datasource is None:
                 raise RuntimeError("Datasource is None, cannot activate.")
-            self.datasource.activate(cfg=self.cfg,
-                                     is_new_instance=self.is_new_instance())
+            self.datasource.activate(
+                cfg=self.cfg, is_new_instance=self.is_new_instance()
+            )
             self._write_to_cache()
 
     def _store_rawdata(self, data, datasource):
         # Raw data is bytes, not a string
         if data is None:
-            data = b''
-        util.write_file(self._get_ipath('%s_raw' % datasource), data, 0o600)
+            data = b""
+        util.write_file(self._get_ipath("%s_raw" % datasource), data, 0o600)
 
     def _store_raw_vendordata(self, data, datasource):
         # Only these data types
         if data is not None and type(data) not in [bytes, str, list]:
-            raise TypeError("vendordata_raw is unsupported type '%s'" %
-                            str(type(data)))
+            raise TypeError(
+                "vendordata_raw is unsupported type '%s'" % str(type(data))
+            )
         # This data may be a list, convert it to a string if so
         if isinstance(data, list):
             data = util.json_dumps(data)
@@ -471,18 +498,21 @@ class Init(object):
     def _store_processeddata(self, processed_data, datasource):
         # processed is a Mime message, so write as string.
         if processed_data is None:
-            processed_data = ''
-        util.write_file(self._get_ipath(datasource),
-                        str(processed_data), 0o600)
+            processed_data = ""
+        util.write_file(
+            self._get_ipath(datasource), str(processed_data), 0o600
+        )
 
     def _default_handlers(self, opts=None):
         if opts is None:
             opts = {}
 
-        opts.update({
-            'paths': self.paths,
-            'datasource': self.datasource,
-        })
+        opts.update(
+            {
+                "paths": self.paths,
+                "datasource": self.datasource,
+            }
+        )
         # TODO(harlowja) Hmmm, should we dynamically import these??
         cloudconfig_handler = CloudConfigPartHandler(**opts)
         shellscript_handler = ShellScriptPartHandler(**opts)
@@ -493,7 +523,8 @@ class Init(object):
             UpstartJobPartHandler(**opts),
         ]
         opts.update(
-            {'sub_handlers': [cloudconfig_handler, shellscript_handler]})
+            {"sub_handlers": [cloudconfig_handler, shellscript_handler]}
+        )
         def_handlers.append(JinjaTemplatePartHandler(**opts))
         return def_handlers
 
@@ -502,16 +533,23 @@ class Init(object):
 
     def _default_vendordata_handlers(self):
         return self._default_handlers(
-            opts={'script_path': 'vendor_scripts',
-                  'cloud_config_path': 'vendor_cloud_config'})
+            opts={
+                "script_path": "vendor_scripts",
+                "cloud_config_path": "vendor_cloud_config",
+            }
+        )
 
     def _default_vendordata2_handlers(self):
         return self._default_handlers(
-            opts={'script_path': 'vendor_scripts',
-                  'cloud_config_path': 'vendor2_cloud_config'})
+            opts={
+                "script_path": "vendor_scripts",
+                "cloud_config_path": "vendor2_cloud_config",
+            }
+        )
 
-    def _do_handlers(self, data_msg, c_handlers_list, frequency,
-                     excluded=None):
+    def _do_handlers(
+        self, data_msg, c_handlers_list, frequency, excluded=None
+    ):
         """
         Generalized handlers suitable for use with either vendordata
         or userdata
@@ -538,21 +576,31 @@ class Init(object):
             for (fname, mod_name) in potential_handlers.items():
                 try:
                     mod_locs, looked_locs = importer.find_module(
-                        mod_name, [''], ['list_types', 'handle_part'])
+                        mod_name, [""], ["list_types", "handle_part"]
+                    )
                     if not mod_locs:
-                        LOG.warning("Could not find a valid user-data handler"
-                                    " named %s in file %s (searched %s)",
-                                    mod_name, fname, looked_locs)
+                        LOG.warning(
+                            "Could not find a valid user-data handler"
+                            " named %s in file %s (searched %s)",
+                            mod_name,
+                            fname,
+                            looked_locs,
+                        )
                         continue
                     mod = importer.import_module(mod_locs[0])
                     mod = handlers.fixup_handler(mod)
                     types = c_handlers.register(mod)
                     if types:
-                        LOG.debug("Added custom handler for %s [%s] from %s",
-                                  types, mod, fname)
+                        LOG.debug(
+                            "Added custom handler for %s [%s] from %s",
+                            types,
+                            mod,
+                            fname,
+                        )
                 except Exception:
-                    util.logexc(LOG, "Failed to register handler from %s",
-                                fname)
+                    util.logexc(
+                        LOG, "Failed to register handler from %s", fname
+                    )
 
         # This keeps track of all the active handlers
         c_handlers = helpers.ContentHandlers()
@@ -584,17 +632,17 @@ class Init(object):
         def walk_handlers(excluded):
             # Walk the user data
             part_data = {
-                'handlers': c_handlers,
+                "handlers": c_handlers,
                 # Any new handlers that are encountered get writen here
-                'handlerdir': idir,
-                'data': data,
+                "handlerdir": idir,
+                "data": data,
                 # The default frequency if handlers don't have one
-                'frequency': frequency,
+                "frequency": frequency,
                 # This will be used when new handlers are found
                 # to help write their contents to files with numbered
                 # names...
-                'handlercount': 0,
-                'excluded': excluded,
+                "handlercount": 0,
+                "excluded": excluded,
             }
             handlers.walk(data_msg, handlers.walker_callback, data=part_data)
 
@@ -620,22 +668,28 @@ class Init(object):
     def consume_data(self, frequency=PER_INSTANCE):
         # Consume the userdata first, because we need want to let the part
         # handlers run first (for merging stuff)
-        with events.ReportEventStack("consume-user-data",
-                                     "reading and applying user-data",
-                                     parent=self.reporter):
-            if util.get_cfg_option_bool(self.cfg, 'allow_userdata', True):
+        with events.ReportEventStack(
+            "consume-user-data",
+            "reading and applying user-data",
+            parent=self.reporter,
+        ):
+            if util.get_cfg_option_bool(self.cfg, "allow_userdata", True):
                 self._consume_userdata(frequency)
             else:
-                LOG.debug('allow_userdata = False: discarding user-data')
+                LOG.debug("allow_userdata = False: discarding user-data")
 
-        with events.ReportEventStack("consume-vendor-data",
-                                     "reading and applying vendor-data",
-                                     parent=self.reporter):
+        with events.ReportEventStack(
+            "consume-vendor-data",
+            "reading and applying vendor-data",
+            parent=self.reporter,
+        ):
             self._consume_vendordata("vendordata", frequency)
 
-        with events.ReportEventStack("consume-vendor-data2",
-                                     "reading and applying vendor-data2",
-                                     parent=self.reporter):
+        with events.ReportEventStack(
+            "consume-vendor-data2",
+            "reading and applying vendor-data2",
+            parent=self.reporter,
+        ):
             self._consume_vendordata("vendordata2", frequency)
 
         # Perform post-consumption adjustments so that
@@ -658,48 +712,56 @@ class Init(object):
         # So we merge the other available cloud-configs (everything except
         # vendor provided), and check whether or not we should consume
         # vendor data at all. That gives user or system a chance to override.
-        if vendor_source == 'vendordata':
+        if vendor_source == "vendordata":
             if not self.datasource.get_vendordata_raw():
                 LOG.debug("no vendordata from datasource")
                 return
-            cfg_name = 'vendor_data'
-        elif vendor_source == 'vendordata2':
+            cfg_name = "vendor_data"
+        elif vendor_source == "vendordata2":
             if not self.datasource.get_vendordata2_raw():
                 LOG.debug("no vendordata2 from datasource")
                 return
-            cfg_name = 'vendor_data2'
+            cfg_name = "vendor_data2"
         else:
-            raise RuntimeError("vendor_source arg must be either 'vendordata'"
-                               " or 'vendordata2'")
-
-        _cc_merger = helpers.ConfigMerger(paths=self._paths,
-                                          datasource=self.datasource,
-                                          additional_fns=[],
-                                          base_cfg=self.cfg,
-                                          include_vendor=False)
+            raise RuntimeError(
+                "vendor_source arg must be either 'vendordata'"
+                " or 'vendordata2'"
+            )
+
+        _cc_merger = helpers.ConfigMerger(
+            paths=self._paths,
+            datasource=self.datasource,
+            additional_fns=[],
+            base_cfg=self.cfg,
+            include_vendor=False,
+        )
         vdcfg = _cc_merger.cfg.get(cfg_name, {})
 
         if not isinstance(vdcfg, dict):
-            vdcfg = {'enabled': False}
-            LOG.warning("invalid %s setting. resetting to: %s",
-                        cfg_name, vdcfg)
+            vdcfg = {"enabled": False}
+            LOG.warning(
+                "invalid %s setting. resetting to: %s", cfg_name, vdcfg
+            )
 
-        enabled = vdcfg.get('enabled')
-        no_handlers = vdcfg.get('disabled_handlers', None)
+        enabled = vdcfg.get("enabled")
+        no_handlers = vdcfg.get("disabled_handlers", None)
 
         if not util.is_true(enabled):
             LOG.debug("%s consumption is disabled.", vendor_source)
             return
 
-        LOG.debug("%s will be consumed. disabled_handlers=%s",
-                  vendor_source, no_handlers)
+        LOG.debug(
+            "%s will be consumed. disabled_handlers=%s",
+            vendor_source,
+            no_handlers,
+        )
 
         # Ensure vendordata source fetched before activation (just in case.)
 
         # c_handlers_list keeps track of all the active handlers, while
         # excluding what the users doesn't want run, i.e. boot_hook,
         # cloud_config, shell_script
-        if vendor_source == 'vendordata':
+        if vendor_source == "vendordata":
             vendor_data_msg = self.datasource.get_vendordata()
             c_handlers_list = self._default_vendordata_handlers()
         else:
@@ -707,8 +769,9 @@ class Init(object):
             c_handlers_list = self._default_vendordata2_handlers()
 
         # Run the handlers
-        self._do_handlers(vendor_data_msg, c_handlers_list, frequency,
-                          excluded=no_handlers)
+        self._do_handlers(
+            vendor_data_msg, c_handlers_list, frequency, excluded=no_handlers
+        )
 
     def _consume_userdata(self, frequency=PER_INSTANCE):
         """
@@ -726,7 +789,8 @@ class Init(object):
 
     def _find_networking_config(self):
         disable_file = os.path.join(
-            self.paths.get_cpath('data'), 'upgraded-network')
+            self.paths.get_cpath("data"), "upgraded-network"
+        )
         if os.path.exists(disable_file):
             return (None, disable_file)
 
@@ -734,12 +798,13 @@ class Init(object):
             NetworkConfigSource.cmdline: cmdline.read_kernel_cmdline_config(),
             NetworkConfigSource.initramfs: cmdline.read_initramfs_config(),
             NetworkConfigSource.ds: None,
-            NetworkConfigSource.system_cfg: self.cfg.get('network'),
+            NetworkConfigSource.system_cfg: self.cfg.get("network"),
         }
 
-        if self.datasource and hasattr(self.datasource, 'network_config'):
-            available_cfgs[NetworkConfigSource.ds] = (
-                self.datasource.network_config)
+        if self.datasource and hasattr(self.datasource, "network_config"):
+            available_cfgs[
+                NetworkConfigSource.ds
+            ] = self.datasource.network_config
 
         if self.datasource:
             order = self.datasource.network_config_sources
@@ -747,12 +812,17 @@ class Init(object):
             order = sources.DataSource.network_config_sources
         for cfg_source in order:
             if not hasattr(NetworkConfigSource, cfg_source):
-                LOG.warning('data source specifies an invalid network'
-                            ' cfg_source: %s', cfg_source)
+                LOG.warning(
+                    "data source specifies an invalid network cfg_source: %s",
+                    cfg_source,
+                )
                 continue
             if cfg_source not in available_cfgs:
-                LOG.warning('data source specifies an unavailable network'
-                            ' cfg_source: %s', cfg_source)
+                LOG.warning(
+                    "data source specifies an unavailable network"
+                    " cfg_source: %s",
+                    cfg_source,
+                )
                 continue
             ncfg = available_cfgs[cfg_source]
             if net.is_disabled_cfg(ncfg):
@@ -760,8 +830,10 @@ class Init(object):
                 return (None, cfg_source)
             if ncfg:
                 return (ncfg, cfg_source)
-        return (self.distro.generate_fallback_config(),
-                NetworkConfigSource.fallback)
+        return (
+            self.distro.generate_fallback_config(),
+            NetworkConfigSource.fallback,
+        )
 
     def _apply_netcfg_names(self, netcfg):
         try:
@@ -771,9 +843,9 @@ class Init(object):
             LOG.warning("Failed to rename devices: %s", e)
 
     def _get_per_boot_network_semaphore(self):
-        return namedtuple('Semaphore', 'semaphore args')(
-            helpers.FileSemaphores(self.paths.get_runpath('sem')),
-            ('apply_network_config', PER_ONCE)
+        return namedtuple("Semaphore", "semaphore args")(
+            helpers.FileSemaphores(self.paths.get_runpath("sem")),
+            ("apply_network_config", PER_ONCE),
         )
 
     def _network_already_configured(self) -> bool:
@@ -792,26 +864,32 @@ class Init(object):
             return
 
         def event_enabled_and_metadata_updated(event_type):
-            return update_event_enabled(
-                datasource=self.datasource,
-                cfg=self.cfg,
-                event_source_type=event_type,
-                scope=EventScope.NETWORK
-            ) and self.datasource.update_metadata_if_supported([event_type])
+            return (
+                update_event_enabled(
+                    datasource=self.datasource,
+                    cfg=self.cfg,
+                    event_source_type=event_type,
+                    scope=EventScope.NETWORK,
+                )
+                and self.datasource.update_metadata_if_supported([event_type])
+            )
 
         def should_run_on_boot_event():
-            return (not self._network_already_configured() and
-                    event_enabled_and_metadata_updated(EventType.BOOT))
+            return (
+                not self._network_already_configured()
+                and event_enabled_and_metadata_updated(EventType.BOOT)
+            )
 
         if (
-            self.datasource is not NULL_DATA_SOURCE and
-            not self.is_new_instance() and
-            not should_run_on_boot_event() and
-            not event_enabled_and_metadata_updated(EventType.BOOT_LEGACY)
+            self.datasource is not NULL_DATA_SOURCE
+            and not self.is_new_instance()
+            and not should_run_on_boot_event()
+            and not event_enabled_and_metadata_updated(EventType.BOOT_LEGACY)
         ):
             LOG.debug(
                 "No network config applied. Neither a new instance"
-                " nor datasource network update allowed")
+                " nor datasource network update allowed"
+            )
             # nothing new, but ensure proper names
             self._apply_netcfg_names(netcfg)
             return
@@ -826,22 +904,32 @@ class Init(object):
         self._apply_netcfg_names(netcfg)
 
         # rendering config
-        LOG.info("Applying network configuration from %s bringup=%s: %s",
-                 src, bring_up, netcfg)
+        LOG.info(
+            "Applying network configuration from %s bringup=%s: %s",
+            src,
+            bring_up,
+            netcfg,
+        )
 
         sem = self._get_per_boot_network_semaphore()
         try:
             with sem.semaphore.lock(*sem.args):
                 return self.distro.apply_network_config(
-                    netcfg, bring_up=bring_up)
+                    netcfg, bring_up=bring_up
+                )
         except net.RendererNotFoundError as e:
-            LOG.error("Unable to render networking. Network config is "
-                      "likely broken: %s", e)
+            LOG.error(
+                "Unable to render networking. Network config is "
+                "likely broken: %s",
+                e,
+            )
             return
         except NotImplementedError:
-            LOG.warning("distro '%s' does not implement apply_network_config. "
-                        "networking may not be configured properly.",
-                        self.distro)
+            LOG.warning(
+                "distro '%s' does not implement apply_network_config. "
+                "networking may not be configured properly.",
+                self.distro,
+            )
             return
 
 
@@ -853,18 +941,22 @@ class Modules(object):
         self._cached_cfg = None
         if reporter is None:
             reporter = events.ReportEventStack(
-                name="module-reporter", description="module-desc",
-                reporting_enabled=False)
+                name="module-reporter",
+                description="module-desc",
+                reporting_enabled=False,
+            )
         self.reporter = reporter
 
     @property
     def cfg(self):
         # None check to avoid empty case causing re-reading
         if self._cached_cfg is None:
-            merger = helpers.ConfigMerger(paths=self.init.paths,
-                                          datasource=self.init.datasource,
-                                          additional_fns=self.cfg_files,
-                                          base_cfg=self.init.cfg)
+            merger = helpers.ConfigMerger(
+                paths=self.init.paths,
+                datasource=self.init.datasource,
+                additional_fns=self.cfg_files,
+                base_cfg=self.init.cfg,
+            )
             self._cached_cfg = merger.cfg
             # LOG.debug("Loading 'module' config %s", self._cached_cfg)
         # Only give out a copy so that others can't modify this...
@@ -885,57 +977,67 @@ class Modules(object):
             if not item:
                 continue
             if isinstance(item, str):
-                module_list.append({
-                    'mod': item.strip(),
-                })
+                module_list.append(
+                    {
+                        "mod": item.strip(),
+                    }
+                )
             elif isinstance(item, (list)):
                 contents = {}
                 # Meant to fall through...
                 if len(item) >= 1:
-                    contents['mod'] = item[0].strip()
+                    contents["mod"] = item[0].strip()
                 if len(item) >= 2:
-                    contents['freq'] = item[1].strip()
+                    contents["freq"] = item[1].strip()
                 if len(item) >= 3:
-                    contents['args'] = item[2:]
+                    contents["args"] = item[2:]
                 if contents:
                     module_list.append(contents)
             elif isinstance(item, (dict)):
                 contents = {}
                 valid = False
-                if 'name' in item:
-                    contents['mod'] = item['name'].strip()
+                if "name" in item:
+                    contents["mod"] = item["name"].strip()
                     valid = True
-                if 'frequency' in item:
-                    contents['freq'] = item['frequency'].strip()
-                if 'args' in item:
-                    contents['args'] = item['args'] or []
+                if "frequency" in item:
+                    contents["freq"] = item["frequency"].strip()
+                if "args" in item:
+                    contents["args"] = item["args"] or []
                 if contents and valid:
                     module_list.append(contents)
             else:
-                raise TypeError(("Failed to read '%s' item in config,"
-                                 " unknown type %s") %
-                                (item, type_utils.obj_name(item)))
+                raise TypeError(
+                    "Failed to read '%s' item in config, unknown type %s"
+                    % (item, type_utils.obj_name(item))
+                )
         return module_list
 
     def _fixup_modules(self, raw_mods):
         mostly_mods = []
         for raw_mod in raw_mods:
-            raw_name = raw_mod['mod']
-            freq = raw_mod.get('freq')
-            run_args = raw_mod.get('args') or []
+            raw_name = raw_mod["mod"]
+            freq = raw_mod.get("freq")
+            run_args = raw_mod.get("args") or []
             mod_name = config.form_module_name(raw_name)
             if not mod_name:
                 continue
             if freq and freq not in FREQUENCIES:
-                LOG.warning(("Config specified module %s"
-                             " has an unknown frequency %s"), raw_name, freq)
+                LOG.warning(
+                    "Config specified module %s has an unknown frequency %s",
+                    raw_name,
+                    freq,
+                )
                 # Reset it so when ran it will get set to a known value
                 freq = None
             mod_locs, looked_locs = importer.find_module(
-                mod_name, ['', type_utils.obj_name(config)], ['handle'])
+                mod_name, ["", type_utils.obj_name(config)], ["handle"]
+            )
             if not mod_locs:
-                LOG.warning("Could not find module named %s (searched %s)",
-                            mod_name, looked_locs)
+                LOG.warning(
+                    "Could not find module named %s (searched %s)",
+                    mod_name,
+                    looked_locs,
+                )
                 continue
             mod = config.fixup_module(importer.import_module(mod_locs[0]))
             mostly_mods.append([mod, raw_name, freq, run_args])
@@ -954,15 +1056,15 @@ class Modules(object):
                     freq = mod.frequency
                 if freq not in FREQUENCIES:
                     freq = PER_INSTANCE
-                LOG.debug("Running module %s (%s) with frequency %s",
-                          name, mod, freq)
+                LOG.debug(
+                    "Running module %s (%s) with frequency %s", name, mod, freq
+                )
 
                 # Use the configs logger and not our own
                 # TODO(harlowja): possibly check the module
                 # for having a LOG attr and just give it back
                 # its own logger?
-                func_args = [name, self.cfg,
-                             cc, config.LOG, args]
+                func_args = [name, self.cfg, cc, config.LOG, args]
                 # Mark it as having started running
                 which_ran.append(name)
                 # This name will affect the semaphore name created
@@ -970,11 +1072,13 @@ class Modules(object):
 
                 desc = "running %s with frequency %s" % (run_name, freq)
                 myrep = events.ReportEventStack(
-                    name=run_name, description=desc, parent=self.reporter)
+                    name=run_name, description=desc, parent=self.reporter
+                )
 
                 with myrep:
-                    ran, _r = cc.run(run_name, mod.handle, func_args,
-                                     freq=freq)
+                    ran, _r = cc.run(
+                        run_name, mod.handle, func_args, freq=freq
+                    )
                     if ran:
                         myrep.message = "%s ran successfully" % run_name
                     else:
@@ -988,9 +1092,9 @@ class Modules(object):
     def run_single(self, mod_name, args=None, freq=None):
         # Form the users module 'specs'
         mod_to_be = {
-            'mod': mod_name,
-            'args': args,
-            'freq': freq,
+            "mod": mod_name,
+            "args": args,
+            "freq": freq,
         }
         # Now resume doing the normal fixups and running
         raw_mods = [mod_to_be]
@@ -1004,13 +1108,14 @@ class Modules(object):
 
         skipped = []
         forced = []
-        overridden = self.cfg.get('unverified_modules', [])
+        overridden = self.cfg.get("unverified_modules", [])
         active_mods = []
         all_distros = set([distros.ALL_DISTROS])
         for (mod, name, _freq, _args) in mostly_mods:
             worked_distros = set(mod.distros)  # Minimally [] per fixup_modules
             worked_distros.update(
-                distros.Distro.expand_osfamily(mod.osfamilies))
+                distros.Distro.expand_osfamily(mod.osfamilies)
+            )
 
             # Skip only when the following conditions are all met:
             #  - distros are defined in the module != ALL_DISTROS
@@ -1026,12 +1131,15 @@ class Modules(object):
             active_mods.append([mod, name, _freq, _args])
 
         if skipped:
-            LOG.info("Skipping modules '%s' because they are not verified "
-                     "on distro '%s'.  To run anyway, add them to "
-                     "'unverified_modules' in config.",
-                     ','.join(skipped), d_name)
+            LOG.info(
+                "Skipping modules '%s' because they are not verified "
+                "on distro '%s'.  To run anyway, add them to "
+                "'unverified_modules' in config.",
+                ",".join(skipped),
+                d_name,
+            )
         if forced:
-            LOG.info("running unverified_modules: '%s'", ', '.join(forced))
+            LOG.info("running unverified_modules: '%s'", ", ".join(forced))
 
         return self._run_modules(active_mods)
 
@@ -1051,7 +1159,9 @@ def fetch_base_config():
             read_runtime_config(),
             # Kernel/cmdline parameters override system config
             util.read_conf_from_cmdline(),
-        ], reverse=True)
+        ],
+        reverse=True,
+    )
 
 
 def _pkl_store(obj, fname):
@@ -1087,4 +1197,5 @@ def _pkl_load(fname):
         util.logexc(LOG, "Failed loading pickled blob from %s", fname)
         return None
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/subp.py b/cloudinit/subp.py
index 024e1a98..7693601d 100644
--- a/cloudinit/subp.py
+++ b/cloudinit/subp.py
@@ -4,7 +4,6 @@
 import logging
 import os
 import subprocess
-
 from errno import ENOEXEC
 
 LOG = logging.getLogger(__name__)
@@ -37,7 +36,7 @@ def prepend_base_command(base_command, commands):
             elif command[0] != base_command:  # Automatically prepend
                 command.insert(0, base_command)
         elif isinstance(command, str):
-            if not command.startswith('%s ' % base_command):
+            if not command.startswith("%s " % base_command):
                 warnings.append(command)
         else:
             errors.append(str(command))
@@ -46,30 +45,43 @@ def prepend_base_command(base_command, commands):
 
     if warnings:
         LOG.warning(
-            'Non-%s commands in %s config:\n%s',
-            base_command, base_command, '\n'.join(warnings))
+            "Non-%s commands in %s config:\n%s",
+            base_command,
+            base_command,
+            "\n".join(warnings),
+        )
     if errors:
         raise TypeError(
-            'Invalid {name} config.'
-            ' These commands are not a string or list:\n{errors}'.format(
-                name=base_command, errors='\n'.join(errors)))
+            "Invalid {name} config."
+            " These commands are not a string or list:\n{errors}".format(
+                name=base_command, errors="\n".join(errors)
+            )
+        )
     return fixed_commands
 
 
 class ProcessExecutionError(IOError):
 
-    MESSAGE_TMPL = ('%(description)s\n'
-                    'Command: %(cmd)s\n'
-                    'Exit code: %(exit_code)s\n'
-                    'Reason: %(reason)s\n'
-                    'Stdout: %(stdout)s\n'
-                    'Stderr: %(stderr)s')
-    empty_attr = '-'
-
-    def __init__(self, stdout=None, stderr=None,
-                 exit_code=None, cmd=None,
-                 description=None, reason=None,
-                 errno=None):
+    MESSAGE_TMPL = (
+        "%(description)s\n"
+        "Command: %(cmd)s\n"
+        "Exit code: %(exit_code)s\n"
+        "Reason: %(reason)s\n"
+        "Stdout: %(stdout)s\n"
+        "Stderr: %(stderr)s"
+    )
+    empty_attr = "-"
+
+    def __init__(
+        self,
+        stdout=None,
+        stderr=None,
+        exit_code=None,
+        cmd=None,
+        description=None,
+        reason=None,
+        errno=None,
+    ):
         if not cmd:
             self.cmd = self.empty_attr
         else:
@@ -77,9 +89,9 @@ class ProcessExecutionError(IOError):
 
         if not description:
             if not exit_code and errno == ENOEXEC:
-                self.description = 'Exec format error. Missing #! in script?'
+                self.description = "Exec format error. Missing #! in script?"
             else:
-                self.description = 'Unexpected error while running command.'
+                self.description = "Unexpected error while running command."
         else:
             self.description = description
 
@@ -111,12 +123,12 @@ class ProcessExecutionError(IOError):
 
         self.errno = errno
         message = self.MESSAGE_TMPL % {
-            'description': self._ensure_string(self.description),
-            'cmd': self._ensure_string(self.cmd),
-            'exit_code': self._ensure_string(self.exit_code),
-            'stdout': self._ensure_string(self.stdout),
-            'stderr': self._ensure_string(self.stderr),
-            'reason': self._ensure_string(self.reason),
+            "description": self._ensure_string(self.description),
+            "cmd": self._ensure_string(self.cmd),
+            "exit_code": self._ensure_string(self.exit_code),
+            "stdout": self._ensure_string(self.stdout),
+            "stderr": self._ensure_string(self.stderr),
+            "reason": self._ensure_string(self.reason),
         }
         IOError.__init__(self, message)
 
@@ -130,8 +142,8 @@ class ProcessExecutionError(IOError):
         """
         indent text on all but the first line, allowing for easy to read output
         """
-        cr = '\n'
-        indent = ' ' * indent_level
+        cr = "\n"
+        indent = " " * indent_level
         # if input is bytes, return bytes
         if isinstance(text, bytes):
             cr = cr.encode()
@@ -141,10 +153,21 @@ class ProcessExecutionError(IOError):
         return text.rstrip(cr).replace(cr, cr + indent)
 
 
-def subp(args, data=None, rcs=None, env=None, capture=True,
-         combine_capture=False, shell=False,
-         logstring=False, decode="replace", target=None, update_env=None,
-         status_cb=None, cwd=None):
+def subp(
+    args,
+    data=None,
+    rcs=None,
+    env=None,
+    capture=True,
+    combine_capture=False,
+    shell=False,
+    logstring=False,
+    decode="replace",
+    target=None,
+    update_env=None,
+    status_cb=None,
+    cwd=None,
+):
     """Run a subprocess.
 
     :param args: command to run in a list. [cmd, arg1, arg2...]
@@ -210,18 +233,26 @@ def subp(args, data=None, rcs=None, env=None, capture=True,
         env.update(update_env)
 
     if target_path(target) != "/":
-        args = ['chroot', target] + list(args)
+        args = ["chroot", target] + list(args)
 
     if status_cb:
-        command = ' '.join(args) if isinstance(args, list) else args
-        status_cb('Begin run command: {command}\n'.format(command=command))
+        command = " ".join(args) if isinstance(args, list) else args
+        status_cb("Begin run command: {command}\n".format(command=command))
     if not logstring:
-        LOG.debug(("Running command %s with allowed return codes %s"
-                   " (shell=%s, capture=%s)"),
-                  args, rcs, shell, 'combine' if combine_capture else capture)
+        LOG.debug(
+            "Running command %s with allowed return codes %s"
+            " (shell=%s, capture=%s)",
+            args,
+            rcs,
+            shell,
+            "combine" if combine_capture else capture,
+        )
     else:
-        LOG.debug(("Running hidden command to protect sensitive "
-                   "input/output logstring: %s"), logstring)
+        LOG.debug(
+            "Running hidden command to protect sensitive "
+            "input/output logstring: %s",
+            logstring,
+        )
 
     stdin = None
     stdout = None
@@ -251,20 +282,28 @@ def subp(args, data=None, rcs=None, env=None, capture=True,
         bytes_args = args.encode("utf-8")
     else:
         bytes_args = [
-            x if isinstance(x, bytes) else x.encode("utf-8")
-            for x in args]
+            x if isinstance(x, bytes) else x.encode("utf-8") for x in args
+        ]
     try:
-        sp = subprocess.Popen(bytes_args, stdout=stdout,
-                              stderr=stderr, stdin=stdin,
-                              env=env, shell=shell, cwd=cwd)
+        sp = subprocess.Popen(
+            bytes_args,
+            stdout=stdout,
+            stderr=stderr,
+            stdin=stdin,
+            env=env,
+            shell=shell,
+            cwd=cwd,
+        )
         (out, err) = sp.communicate(data)
     except OSError as e:
         if status_cb:
-            status_cb('ERROR: End run command: invalid command provided\n')
+            status_cb("ERROR: End run command: invalid command provided\n")
         raise ProcessExecutionError(
-            cmd=args, reason=e, errno=e.errno,
+            cmd=args,
+            reason=e,
+            errno=e.errno,
             stdout="-" if decode else b"-",
-            stderr="-" if decode else b"-"
+            stderr="-" if decode else b"-",
         ) from e
     finally:
         if devnull_fp:
@@ -273,11 +312,12 @@ def subp(args, data=None, rcs=None, env=None, capture=True,
     # Just ensure blank instead of none.
     if capture or combine_capture:
         if not out:
-            out = b''
+            out = b""
         if not err:
-            err = b''
+            err = b""
     if decode:
-        def ldecode(data, m='utf-8'):
+
+        def ldecode(data, m="utf-8"):
             if not isinstance(data, bytes):
                 return data
             return data.decode(m, decode)
@@ -288,13 +328,12 @@ def subp(args, data=None, rcs=None, env=None, capture=True,
     rc = sp.returncode
     if rc not in rcs:
         if status_cb:
-            status_cb(
-                'ERROR: End run command: exit({code})\n'.format(code=rc))
-        raise ProcessExecutionError(stdout=out, stderr=err,
-                                    exit_code=rc,
-                                    cmd=args)
+            status_cb("ERROR: End run command: exit({code})\n".format(code=rc))
+        raise ProcessExecutionError(
+            stdout=out, stderr=err, exit_code=rc, cmd=args
+        )
     if status_cb:
-        status_cb('End run command: exit({code})\n'.format(code=rc))
+        status_cb("End run command: exit({code})\n".format(code=rc))
     return (out, err)
 
 
@@ -331,8 +370,9 @@ def which(program, search=None, target=None):
             return program
 
     if search is None:
-        paths = [p.strip('"') for p in
-                 os.environ.get("PATH", "").split(os.pathsep)]
+        paths = [
+            p.strip('"') for p in os.environ.get("PATH", "").split(os.pathsep)
+        ]
         if target == "/":
             search = paths
         else:
@@ -382,8 +422,9 @@ def runparts(dirp, skip_no_exist=True, exe_prefix=None):
 
     if failed and attempted:
         raise RuntimeError(
-            'Runparts: %s failures (%s) in %s attempted commands' %
-            (len(failed), ",".join(failed), len(attempted)))
+            "Runparts: %s failures (%s) in %s attempted commands"
+            % (len(failed), ",".join(failed), len(attempted))
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/cloudinit/temp_utils.py b/cloudinit/temp_utils.py
index 346276ec..e23b6599 100644
--- a/cloudinit/temp_utils.py
+++ b/cloudinit/temp_utils.py
@@ -42,7 +42,7 @@ def _tempfile_dir_arg(odir=None, needs_exe=False):
     if os.getuid() == 0:
         tdir = _ROOT_TMPDIR
     else:
-        tdir = os.environ.get('TMPDIR', '/tmp')
+        tdir = os.environ.get("TMPDIR", "/tmp")
     if not os.path.isdir(tdir):
         os.makedirs(tdir)
         os.chmod(tdir, 0o1777)
@@ -52,8 +52,9 @@ def _tempfile_dir_arg(odir=None, needs_exe=False):
 
 
 def ExtendedTemporaryFile(**kwargs):
-    kwargs['dir'] = _tempfile_dir_arg(
-        kwargs.pop('dir', None), kwargs.pop('needs_exe', False))
+    kwargs["dir"] = _tempfile_dir_arg(
+        kwargs.pop("dir", None), kwargs.pop("needs_exe", False)
+    )
     fh = tempfile.NamedTemporaryFile(**kwargs)
     # Replace its unlink with a quiet version
     # that does not raise errors when the
@@ -76,7 +77,7 @@ def ExtendedTemporaryFile(**kwargs):
     def unlink_now():
         fh.unlink(fh.name)
 
-    setattr(fh, 'unlink_now', unlink_now)
+    setattr(fh, "unlink_now", unlink_now)
     return fh
 
 
@@ -93,14 +94,17 @@ def tempdir(rmtree_ignore_errors=False, **kwargs):
 
 
 def mkdtemp(**kwargs):
-    kwargs['dir'] = _tempfile_dir_arg(
-        kwargs.pop('dir', None), kwargs.pop('needs_exe', False))
+    kwargs["dir"] = _tempfile_dir_arg(
+        kwargs.pop("dir", None), kwargs.pop("needs_exe", False)
+    )
     return tempfile.mkdtemp(**kwargs)
 
 
 def mkstemp(**kwargs):
-    kwargs['dir'] = _tempfile_dir_arg(
-        kwargs.pop('dir', None), kwargs.pop('needs_exe', False))
+    kwargs["dir"] = _tempfile_dir_arg(
+        kwargs.pop("dir", None), kwargs.pop("needs_exe", False)
+    )
     return tempfile.mkstemp(**kwargs)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/templater.py b/cloudinit/templater.py
index 009bed32..c215bbbb 100644
--- a/cloudinit/templater.py
+++ b/cloudinit/templater.py
@@ -13,16 +13,17 @@
 import collections
 import re
 
-
 try:
     from Cheetah.Template import Template as CTemplate
+
     CHEETAH_AVAILABLE = True
 except (ImportError, AttributeError):
     CHEETAH_AVAILABLE = False
 
 try:
-    from jinja2 import Template as JTemplate
     from jinja2 import DebugUndefined as JUndefined
+    from jinja2 import Template as JTemplate
+
     JINJA_AVAILABLE = True
 except (ImportError, AttributeError):
     JINJA_AVAILABLE = False
@@ -32,25 +33,26 @@ from cloudinit import log as logging
 from cloudinit import type_utils as tu
 from cloudinit import util
 
-
 LOG = logging.getLogger(__name__)
 TYPE_MATCHER = re.compile(r"##\s*template:(.*)", re.I)
-BASIC_MATCHER = re.compile(r'\$\{([A-Za-z0-9_.]+)\}|\$([A-Za-z0-9_.]+)')
-MISSING_JINJA_PREFIX = 'CI_MISSING_JINJA_VAR/'
+BASIC_MATCHER = re.compile(r"\$\{([A-Za-z0-9_.]+)\}|\$([A-Za-z0-9_.]+)")
+MISSING_JINJA_PREFIX = "CI_MISSING_JINJA_VAR/"
 
 
 class UndefinedJinjaVariable(JUndefined):
     """Class used to represent any undefined jinja template variable."""
 
     def __str__(self):
-        return '%s%s' % (MISSING_JINJA_PREFIX, self._undefined_name)
+        return "%s%s" % (MISSING_JINJA_PREFIX, self._undefined_name)
 
     def __sub__(self, other):
-        other = str(other).replace(MISSING_JINJA_PREFIX, '')
+        other = str(other).replace(MISSING_JINJA_PREFIX, "")
         raise TypeError(
             'Undefined jinja variable: "{this}-{other}". Jinja tried'
             ' subtraction. Perhaps you meant "{this}_{other}"?'.format(
-                this=self._undefined_name, other=other))
+                this=self._undefined_name, other=other
+            )
+        )
 
 
 def basic_render(content, params):
@@ -73,67 +75,75 @@ def basic_render(content, params):
         while len(path) > 1:
             key = path.popleft()
             if not isinstance(selected_params, dict):
-                raise TypeError("Can not traverse into"
-                                " non-dictionary '%s' of type %s while"
-                                " looking for subkey '%s'"
-                                % (selected_params,
-                                   tu.obj_name(selected_params),
-                                   key))
+                raise TypeError(
+                    "Can not traverse into"
+                    " non-dictionary '%s' of type %s while"
+                    " looking for subkey '%s'"
+                    % (selected_params, tu.obj_name(selected_params), key)
+                )
             selected_params = selected_params[key]
         key = path.popleft()
         if not isinstance(selected_params, dict):
-            raise TypeError("Can not extract key '%s' from non-dictionary"
-                            " '%s' of type %s"
-                            % (key, selected_params,
-                               tu.obj_name(selected_params)))
+            raise TypeError(
+                "Can not extract key '%s' from non-dictionary '%s' of type %s"
+                % (key, selected_params, tu.obj_name(selected_params))
+            )
         return str(selected_params[key])
 
     return BASIC_MATCHER.sub(replacer, content)
 
 
 def detect_template(text):
-
     def cheetah_render(content, params):
         return CTemplate(content, searchList=[params]).respond()
 
     def jinja_render(content, params):
         # keep_trailing_newline is in jinja2 2.7+, not 2.6
         add = "\n" if content.endswith("\n") else ""
-        return JTemplate(content,
-                         undefined=UndefinedJinjaVariable,
-                         trim_blocks=True).render(**params) + add
+        return (
+            JTemplate(
+                content, undefined=UndefinedJinjaVariable, trim_blocks=True
+            ).render(**params)
+            + add
+        )
 
     if text.find("\n") != -1:
         ident, rest = text.split("\n", 1)
     else:
         ident = text
-        rest = ''
+        rest = ""
     type_match = TYPE_MATCHER.match(ident)
     if not type_match:
         if CHEETAH_AVAILABLE:
             LOG.debug("Using Cheetah as the renderer for unknown template.")
-            return ('cheetah', cheetah_render, text)
+            return ("cheetah", cheetah_render, text)
         else:
-            return ('basic', basic_render, text)
+            return ("basic", basic_render, text)
     else:
         template_type = type_match.group(1).lower().strip()
-        if template_type not in ('jinja', 'cheetah', 'basic'):
-            raise ValueError("Unknown template rendering type '%s' requested"
-                             % template_type)
-        if template_type == 'jinja' and not JINJA_AVAILABLE:
-            LOG.warning("Jinja not available as the selected renderer for"
-                        " desired template, reverting to the basic renderer.")
-            return ('basic', basic_render, rest)
-        elif template_type == 'jinja' and JINJA_AVAILABLE:
-            return ('jinja', jinja_render, rest)
-        if template_type == 'cheetah' and not CHEETAH_AVAILABLE:
-            LOG.warning("Cheetah not available as the selected renderer for"
-                        " desired template, reverting to the basic renderer.")
-            return ('basic', basic_render, rest)
-        elif template_type == 'cheetah' and CHEETAH_AVAILABLE:
-            return ('cheetah', cheetah_render, rest)
+        if template_type not in ("jinja", "cheetah", "basic"):
+            raise ValueError(
+                "Unknown template rendering type '%s' requested"
+                % template_type
+            )
+        if template_type == "jinja" and not JINJA_AVAILABLE:
+            LOG.warning(
+                "Jinja not available as the selected renderer for"
+                " desired template, reverting to the basic renderer."
+            )
+            return ("basic", basic_render, rest)
+        elif template_type == "jinja" and JINJA_AVAILABLE:
+            return ("jinja", jinja_render, rest)
+        if template_type == "cheetah" and not CHEETAH_AVAILABLE:
+            LOG.warning(
+                "Cheetah not available as the selected renderer for"
+                " desired template, reverting to the basic renderer."
+            )
+            return ("basic", basic_render, rest)
+        elif template_type == "cheetah" and CHEETAH_AVAILABLE:
+            return ("cheetah", cheetah_render, rest)
         # Only thing left over is the basic renderer (it is always available).
-        return ('basic', basic_render, rest)
+        return ("basic", basic_render, rest)
 
 
 def render_from_file(fn, params):
@@ -143,7 +153,8 @@ def render_from_file(fn, params):
     # If it is given a str that has non-ascii then it will raise a
     # UnicodeDecodeError.  So we explicitly convert to unicode type here.
     template_type, renderer, content = detect_template(
-        util.load_file(fn, decode=False).decode('utf-8'))
+        util.load_file(fn, decode=False).decode("utf-8")
+    )
     LOG.debug("Rendering content of '%s' using renderer %s", fn, template_type)
     return renderer(content, params)
 
@@ -168,4 +179,5 @@ def render_string(content, params):
     _template_type, renderer, content = detect_template(content)
     return renderer(content, params)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/type_utils.py b/cloudinit/type_utils.py
index 2c1ae368..d971b278 100644
--- a/cloudinit/type_utils.py
+++ b/cloudinit/type_utils.py
@@ -10,7 +10,6 @@
 
 import types
 
-
 _NAME_TYPES = (
     types.ModuleType,
     types.FunctionType,
@@ -23,9 +22,10 @@ def obj_name(obj):
     if isinstance(obj, _NAME_TYPES):
         return str(obj.__name__)
     else:
-        if not hasattr(obj, '__class__'):
+        if not hasattr(obj, "__class__"):
             return repr(obj)
         else:
             return obj_name(obj.__class__)
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/url_helper.py b/cloudinit/url_helper.py
index caa88435..847e5379 100644
--- a/cloudinit/url_helper.py
+++ b/cloudinit/url_helper.py
@@ -17,7 +17,7 @@ from errno import ENOENT
 from functools import partial
 from http.client import NOT_FOUND
 from itertools import count
-from urllib.parse import urlparse, urlunparse, quote
+from urllib.parse import quote, urlparse, urlunparse
 
 import requests
 from requests import exceptions
@@ -32,32 +32,33 @@ LOG = logging.getLogger(__name__)
 SSL_ENABLED = False
 CONFIG_ENABLED = False  # This was added in 0.7 (but taken out in >=1.0)
 _REQ_VER = None
-REDACTED = 'REDACTED'
+REDACTED = "REDACTED"
 try:
     from distutils.version import LooseVersion
+
     import pkg_resources
-    _REQ = pkg_resources.get_distribution('requests')
+
+    _REQ = pkg_resources.get_distribution("requests")
     _REQ_VER = LooseVersion(_REQ.version)  # pylint: disable=no-member
-    if _REQ_VER >= LooseVersion('0.8.8'):
+    if _REQ_VER >= LooseVersion("0.8.8"):
         SSL_ENABLED = True
-    if LooseVersion('0.7.0') <= _REQ_VER < LooseVersion('1.0.0'):
+    if LooseVersion("0.7.0") <= _REQ_VER < LooseVersion("1.0.0"):
         CONFIG_ENABLED = True
 except ImportError:
     pass
 
 
 def _cleanurl(url):
-    parsed_url = list(urlparse(url, scheme='http'))
+    parsed_url = list(urlparse(url, scheme="http"))
     if not parsed_url[1] and parsed_url[2]:
         # Swap these since this seems to be a common
         # occurrence when given urls like 'www.google.com'
         parsed_url[1] = parsed_url[2]
-        parsed_url[2] = ''
+        parsed_url[2] = ""
     return urlunparse(parsed_url)
 
 
 def combine_url(base, *add_ons):
-
     def combine_single(url, add_on):
         url_parsed = list(urlparse(url))
         path = url_parsed[2]
@@ -87,7 +88,7 @@ def read_file_or_url(url, **kwargs):
     if url.lower().startswith("file://"):
         if kwargs.get("data"):
             LOG.warning("Unable to post data to file resource %s", url)
-        file_path = url[len("file://"):]
+        file_path = url[len("file://") :]
         try:
             with open(file_path, "rb") as fp:
                 contents = fp.read()
@@ -117,7 +118,7 @@ class StringResponse(object):
         return True
 
     def __str__(self):
-        return self.contents.decode('utf-8')
+        return self.contents.decode("utf-8")
 
 
 class FileResponse(StringResponse):
@@ -173,28 +174,46 @@ class UrlError(IOError):
 def _get_ssl_args(url, ssl_details):
     ssl_args = {}
     scheme = urlparse(url).scheme
-    if scheme == 'https' and ssl_details:
+    if scheme == "https" and ssl_details:
         if not SSL_ENABLED:
-            LOG.warning("SSL is not supported in requests v%s, "
-                        "cert. verification can not occur!", _REQ_VER)
+            LOG.warning(
+                "SSL is not supported in requests v%s, "
+                "cert. verification can not occur!",
+                _REQ_VER,
+            )
         else:
-            if 'ca_certs' in ssl_details and ssl_details['ca_certs']:
-                ssl_args['verify'] = ssl_details['ca_certs']
+            if "ca_certs" in ssl_details and ssl_details["ca_certs"]:
+                ssl_args["verify"] = ssl_details["ca_certs"]
             else:
-                ssl_args['verify'] = True
-            if 'cert_file' in ssl_details and 'key_file' in ssl_details:
-                ssl_args['cert'] = [ssl_details['cert_file'],
-                                    ssl_details['key_file']]
-            elif 'cert_file' in ssl_details:
-                ssl_args['cert'] = str(ssl_details['cert_file'])
+                ssl_args["verify"] = True
+            if "cert_file" in ssl_details and "key_file" in ssl_details:
+                ssl_args["cert"] = [
+                    ssl_details["cert_file"],
+                    ssl_details["key_file"],
+                ]
+            elif "cert_file" in ssl_details:
+                ssl_args["cert"] = str(ssl_details["cert_file"])
     return ssl_args
 
 
-def readurl(url, data=None, timeout=None, retries=0, sec_between=1,
-            headers=None, headers_cb=None, headers_redact=None,
-            ssl_details=None, check_status=True, allow_redirects=True,
-            exception_cb=None, session=None, infinite=False, log_req_resp=True,
-            request_method=None):
+def readurl(
+    url,
+    data=None,
+    timeout=None,
+    retries=0,
+    sec_between=1,
+    headers=None,
+    headers_cb=None,
+    headers_redact=None,
+    ssl_details=None,
+    check_status=True,
+    allow_redirects=True,
+    exception_cb=None,
+    session=None,
+    infinite=False,
+    log_req_resp=True,
+    request_method=None,
+):
     """Wrapper around requests.Session to read the url and retry if necessary
 
     :param url: Mandatory url to request.
@@ -227,15 +246,15 @@ def readurl(url, data=None, timeout=None, retries=0, sec_between=1,
     """
     url = _cleanurl(url)
     req_args = {
-        'url': url,
+        "url": url,
     }
     req_args.update(_get_ssl_args(url, ssl_details))
-    req_args['allow_redirects'] = allow_redirects
+    req_args["allow_redirects"] = allow_redirects
     if not request_method:
-        request_method = 'POST' if data else 'GET'
-    req_args['method'] = request_method
+        request_method = "POST" if data else "GET"
+    req_args["method"] = request_method
     if timeout is not None:
-        req_args['timeout'] = max(float(timeout), 0)
+        req_args["timeout"] = max(float(timeout), 0)
     if headers_redact is None:
         headers_redact = []
     # It doesn't seem like config
@@ -243,31 +262,33 @@ def readurl(url, data=None, timeout=None, retries=0, sec_between=1,
     # need to manually do the retries if it wasn't...
     if CONFIG_ENABLED:
         req_config = {
-            'store_cookies': False,
+            "store_cookies": False,
         }
         # Don't use the retry support built-in
         # since it doesn't allow for 'sleep_times'
         # in between tries....
         # if retries:
         #     req_config['max_retries'] = max(int(retries), 0)
-        req_args['config'] = req_config
+        req_args["config"] = req_config
     manual_tries = 1
     if retries:
         manual_tries = max(int(retries) + 1, 1)
 
     def_headers = {
-        'User-Agent': 'Cloud-Init/%s' % (version.version_string()),
+        "User-Agent": "Cloud-Init/%s" % (version.version_string()),
     }
     if headers:
         def_headers.update(headers)
     headers = def_headers
 
     if not headers_cb:
+
         def _cb(url):
             return headers
+
         headers_cb = _cb
     if data:
-        req_args['data'] = data
+        req_args["data"] = data
     if sec_between is None:
         sec_between = -1
 
@@ -276,12 +297,12 @@ def readurl(url, data=None, timeout=None, retries=0, sec_between=1,
     # doesn't handle sleeping between tries...
     # Infinitely retry if infinite is True
     for i in count() if infinite else range(0, manual_tries):
-        req_args['headers'] = headers_cb(url)
+        req_args["headers"] = headers_cb(url)
         filtered_req_args = {}
         for (k, v) in req_args.items():
-            if k == 'data':
+            if k == "data":
                 continue
-            if k == 'headers' and headers_redact:
+            if k == "headers" and headers_redact:
                 matched_headers = [k for k in headers_redact if v.get(k)]
                 if matched_headers:
                     filtered_req_args[k] = copy.deepcopy(v)
@@ -292,9 +313,13 @@ def readurl(url, data=None, timeout=None, retries=0, sec_between=1,
         try:
 
             if log_req_resp:
-                LOG.debug("[%s/%s] open '%s' with %s configuration", i,
-                          "infinite" if infinite else manual_tries, url,
-                          filtered_req_args)
+                LOG.debug(
+                    "[%s/%s] open '%s' with %s configuration",
+                    i,
+                    "infinite" if infinite else manual_tries,
+                    url,
+                    filtered_req_args,
+                )
 
             if session is None:
                 session = requests.Session()
@@ -304,19 +329,33 @@ def readurl(url, data=None, timeout=None, retries=0, sec_between=1,
 
             if check_status:
                 r.raise_for_status()
-            LOG.debug("Read from %s (%s, %sb) after %s attempts", url,
-                      r.status_code, len(r.content), (i + 1))
+            LOG.debug(
+                "Read from %s (%s, %sb) after %s attempts",
+                url,
+                r.status_code,
+                len(r.content),
+                (i + 1),
+            )
             # Doesn't seem like we can make it use a different
             # subclass for responses, so add our own backward-compat
             # attrs
             return UrlResponse(r)
         except exceptions.RequestException as e:
-            if (isinstance(e, (exceptions.HTTPError)) and
-               hasattr(e, 'response') and  # This appeared in v 0.10.8
-               hasattr(e.response, 'status_code')):
-                excps.append(UrlError(e, code=e.response.status_code,
-                                      headers=e.response.headers,
-                                      url=url))
+            if (
+                isinstance(e, (exceptions.HTTPError))
+                and hasattr(e, "response")
+                and hasattr(  # This appeared in v 0.10.8
+                    e.response, "status_code"
+                )
+            ):
+                excps.append(
+                    UrlError(
+                        e,
+                        code=e.response.status_code,
+                        headers=e.response.headers,
+                        url=url,
+                    )
+                )
             else:
                 excps.append(UrlError(e, url=url))
                 if SSL_ENABLED and isinstance(e, exceptions.SSLError):
@@ -328,22 +367,33 @@ def readurl(url, data=None, timeout=None, retries=0, sec_between=1,
                 # to continue retrying and False to break and re-raise the
                 # exception
                 break
-            if (infinite and sec_between > 0) or \
-               (i + 1 < manual_tries and sec_between > 0):
+            if (infinite and sec_between > 0) or (
+                i + 1 < manual_tries and sec_between > 0
+            ):
 
                 if log_req_resp:
                     LOG.debug(
                         "Please wait %s seconds while we wait to try again",
-                        sec_between)
+                        sec_between,
+                    )
                 time.sleep(sec_between)
     if excps:
         raise excps[-1]
     return None  # Should throw before this...
 
 
-def wait_for_url(urls, max_wait=None, timeout=None, status_cb=None,
-                 headers_cb=None, headers_redact=None, sleep_time=1,
-                 exception_cb=None, sleep_time_cb=None, request_method=None):
+def wait_for_url(
+    urls,
+    max_wait=None,
+    timeout=None,
+    status_cb=None,
+    headers_cb=None,
+    headers_redact=None,
+    sleep_time=1,
+    exception_cb=None,
+    sleep_time_cb=None,
+    request_method=None,
+):
     """
     urls:      a list of urls to try
     max_wait:  roughly the maximum time to wait before giving up
@@ -388,9 +438,9 @@ def wait_for_url(urls, max_wait=None, timeout=None, status_cb=None,
         status_cb = log_status_cb
 
     def timeup(max_wait, start_time):
-        if (max_wait is None):
+        if max_wait is None:
             return False
-        return ((max_wait <= 0) or (time.time() - start_time > max_wait))
+        return (max_wait <= 0) or (time.time() - start_time > max_wait)
 
     loop_n = 0
     response = None
@@ -404,8 +454,11 @@ def wait_for_url(urls, max_wait=None, timeout=None, status_cb=None,
             if loop_n != 0:
                 if timeup(max_wait, start_time):
                     break
-                if (max_wait is not None and
-                        timeout and (now + timeout > (start_time + max_wait))):
+                if (
+                    max_wait is not None
+                    and timeout
+                    and (now + timeout > (start_time + max_wait))
+                ):
                     # shorten timeout to not run way over max_time
                     timeout = int((start_time + max_wait) - now)
 
@@ -418,17 +471,29 @@ def wait_for_url(urls, max_wait=None, timeout=None, status_cb=None,
                     headers = {}
 
                 response = readurl(
-                    url, headers=headers, headers_redact=headers_redact,
-                    timeout=timeout, check_status=False,
-                    request_method=request_method)
+                    url,
+                    headers=headers,
+                    headers_redact=headers_redact,
+                    timeout=timeout,
+                    check_status=False,
+                    request_method=request_method,
+                )
                 if not response.contents:
                     reason = "empty response [%s]" % (response.code)
-                    url_exc = UrlError(ValueError(reason), code=response.code,
-                                       headers=response.headers, url=url)
+                    url_exc = UrlError(
+                        ValueError(reason),
+                        code=response.code,
+                        headers=response.headers,
+                        url=url,
+                    )
                 elif not response.ok():
                     reason = "bad status code [%s]" % (response.code)
-                    url_exc = UrlError(ValueError(reason), code=response.code,
-                                       headers=response.headers, url=url)
+                    url_exc = UrlError(
+                        ValueError(reason),
+                        code=response.code,
+                        headers=response.headers,
+                        url=url,
+                    )
                 else:
                     return url, response.contents
             except UrlError as e:
@@ -440,10 +505,12 @@ def wait_for_url(urls, max_wait=None, timeout=None, status_cb=None,
 
             time_taken = int(time.time() - start_time)
             max_wait_str = "%ss" % max_wait if max_wait else "unlimited"
-            status_msg = "Calling '%s' failed [%s/%s]: %s" % (url,
-                                                              time_taken,
-                                                              max_wait_str,
-                                                              reason)
+            status_msg = "Calling '%s' failed [%s/%s]: %s" % (
+                url,
+                time_taken,
+                max_wait_str,
+                reason,
+            )
             status_cb(status_msg)
             if exception_cb:
                 # This can be used to alter the headers that will be sent
@@ -455,17 +522,23 @@ def wait_for_url(urls, max_wait=None, timeout=None, status_cb=None,
             break
 
         loop_n = loop_n + 1
-        LOG.debug("Please wait %s seconds while we wait to try again",
-                  sleep_time)
+        LOG.debug(
+            "Please wait %s seconds while we wait to try again", sleep_time
+        )
         time.sleep(sleep_time)
 
     return False, None
 
 
 class OauthUrlHelper(object):
-    def __init__(self, consumer_key=None, token_key=None,
-                 token_secret=None, consumer_secret=None,
-                 skew_data_file="/run/oauth_skew.json"):
+    def __init__(
+        self,
+        consumer_key=None,
+        token_key=None,
+        token_secret=None,
+        consumer_secret=None,
+        skew_data_file="/run/oauth_skew.json",
+    ):
         self.consumer_key = consumer_key
         self.consumer_secret = consumer_secret or ""
         self.token_key = token_key
@@ -477,8 +550,10 @@ class OauthUrlHelper(object):
         if not any(required):
             self._do_oauth = False
         elif not all(required):
-            raise ValueError("all or none of token_key, token_secret, or "
-                             "consumer_key can be set")
+            raise ValueError(
+                "all or none of token_key, token_secret, or "
+                "consumer_key can be set"
+            )
 
         old = self.read_skew_file()
         self.skew_data = old or {}
@@ -501,16 +576,17 @@ class OauthUrlHelper(object):
             fp.write(json.dumps(cur))
 
     def exception_cb(self, msg, exception):
-        if not (isinstance(exception, UrlError) and
-                (exception.code == 403 or exception.code == 401)):
+        if not (
+            isinstance(exception, UrlError)
+            and (exception.code == 403 or exception.code == 401)
+        ):
             return
 
-        if 'date' not in exception.headers:
-            LOG.warning("Missing header 'date' in %s response",
-                        exception.code)
+        if "date" not in exception.headers:
+            LOG.warning("Missing header 'date' in %s response", exception.code)
             return
 
-        date = exception.headers['date']
+        date = exception.headers["date"]
         try:
             remote_time = time.mktime(parsedate(date))
         except Exception as e:
@@ -537,15 +613,21 @@ class OauthUrlHelper(object):
             timestamp = int(time.time()) + self.skew_data[host]
 
         return oauth_headers(
-            url=url, consumer_key=self.consumer_key,
-            token_key=self.token_key, token_secret=self.token_secret,
-            consumer_secret=self.consumer_secret, timestamp=timestamp)
+            url=url,
+            consumer_key=self.consumer_key,
+            token_key=self.token_key,
+            token_secret=self.token_secret,
+            consumer_secret=self.consumer_secret,
+            timestamp=timestamp,
+        )
 
     def _wrapped(self, wrapped_func, args, kwargs):
-        kwargs['headers_cb'] = partial(
-            self._headers_cb, kwargs.get('headers_cb'))
-        kwargs['exception_cb'] = partial(
-            self._exception_cb, kwargs.get('exception_cb'))
+        kwargs["headers_cb"] = partial(
+            self._headers_cb, kwargs.get("headers_cb")
+        )
+        kwargs["exception_cb"] = partial(
+            self._exception_cb, kwargs.get("exception_cb")
+        )
         return wrapped_func(*args, **kwargs)
 
     def wait_for_url(self, *args, **kwargs):
@@ -571,12 +653,13 @@ class OauthUrlHelper(object):
         return headers
 
 
-def oauth_headers(url, consumer_key, token_key, token_secret, consumer_secret,
-                  timestamp=None):
+def oauth_headers(
+    url, consumer_key, token_key, token_secret, consumer_secret, timestamp=None
+):
     try:
         import oauthlib.oauth1 as oauth1
     except ImportError as e:
-        raise NotImplementedError('oauth support is not available') from e
+        raise NotImplementedError("oauth support is not available") from e
 
     if timestamp:
         timestamp = str(timestamp)
@@ -589,7 +672,8 @@ def oauth_headers(url, consumer_key, token_key, token_secret, consumer_secret,
         resource_owner_key=token_key,
         resource_owner_secret=token_secret,
         signature_method=oauth1.SIGNATURE_PLAINTEXT,
-        timestamp=timestamp)
+        timestamp=timestamp,
+    )
     _uri, signed_headers, _body = client.sign(url)
     return signed_headers
 
@@ -607,4 +691,5 @@ def retry_on_url_exc(msg, exc):
         return True
     return False
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/user_data.py b/cloudinit/user_data.py
index 1317e063..05c66741 100644
--- a/cloudinit/user_data.py
+++ b/cloudinit/user_data.py
@@ -14,11 +14,10 @@ from email.mime.multipart import MIMEMultipart
 from email.mime.nonmultipart import MIMENonMultipart
 from email.mime.text import MIMEText
 
-from cloudinit import handlers
+from cloudinit import features, handlers
 from cloudinit import log as logging
-from cloudinit import features
-from cloudinit.url_helper import read_file_or_url, UrlError
 from cloudinit import util
+from cloudinit.url_helper import UrlError, read_file_or_url
 
 LOG = logging.getLogger(__name__)
 
@@ -28,11 +27,11 @@ PART_FN_TPL = handlers.PART_FN_TPL
 OCTET_TYPE = handlers.OCTET_TYPE
 
 # Saves typing errors
-CONTENT_TYPE = 'Content-Type'
+CONTENT_TYPE = "Content-Type"
 
 # Various special content types that cause special actions
 TYPE_NEEDED = ["text/plain", "text/x-not-multipart"]
-INCLUDE_TYPES = ['text/x-include-url', 'text/x-include-once-url']
+INCLUDE_TYPES = ["text/x-include-url", "text/x-include-once-url"]
 ARCHIVE_TYPES = ["text/cloud-config-archive"]
 UNDEF_TYPE = "text/plain"
 ARCHIVE_UNDEF_TYPE = "text/cloud-config"
@@ -40,18 +39,18 @@ ARCHIVE_UNDEF_BINARY_TYPE = "application/octet-stream"
 
 # This seems to hit most of the gzip possible content types.
 DECOMP_TYPES = [
-    'application/gzip',
-    'application/gzip-compressed',
-    'application/gzipped',
-    'application/x-compress',
-    'application/x-compressed',
-    'application/x-gunzip',
-    'application/x-gzip',
-    'application/x-gzip-compressed',
+    "application/gzip",
+    "application/gzip-compressed",
+    "application/gzipped",
+    "application/x-compress",
+    "application/x-compressed",
+    "application/x-gunzip",
+    "application/x-gzip",
+    "application/x-gzip-compressed",
 ]
 
 # Msg header used to track attachments
-ATTACHMENT_FIELD = 'Number-Attachments'
+ATTACHMENT_FIELD = "Number-Attachments"
 
 # Only the following content types can have there launch index examined
 # in there payload, evey other content type can still provide a header
@@ -64,9 +63,8 @@ def _replace_header(msg, key, value):
 
 
 def _set_filename(msg, filename):
-    del msg['Content-Disposition']
-    msg.add_header('Content-Disposition',
-                   'attachment', filename=str(filename))
+    del msg["Content-Disposition"]
+    msg.add_header("Content-Disposition", "attachment", filename=str(filename))
 
 
 def _handle_error(error_message, source_exception=None):
@@ -91,7 +89,6 @@ class UserDataProcessor(object):
         return accumulating_msg
 
     def _process_msg(self, base_msg, append_msg):
-
         def find_ctype(payload):
             return handlers.type_from_starts_with(payload)
 
@@ -118,7 +115,9 @@ class UserDataProcessor(object):
                     error_message = (
                         "Failed decompressing payload from {} of"
                         " length {} due to: {}".format(
-                            ctype_orig, len(payload), e))
+                            ctype_orig, len(payload), e
+                        )
+                    )
                     _handle_error(error_message, e)
                     continue
 
@@ -130,7 +129,7 @@ class UserDataProcessor(object):
             # to check the true MIME type for x-shellscript type since all
             # shellscript payloads must have a #! header.  The other MIME types
             # that cloud-init supports do not have the same guarantee.
-            if ctype_orig in TYPE_NEEDED + ['text/x-shellscript']:
+            if ctype_orig in TYPE_NEEDED + ["text/x-shellscript"]:
                 ctype = find_ctype(payload)
             if ctype is None:
                 ctype = ctype_orig
@@ -148,7 +147,7 @@ class UserDataProcessor(object):
                 # after decoding and decompression.
                 if part.get_filename():
                     _set_filename(n_part, part.get_filename())
-                for h in ('Launch-Index',):
+                for h in ("Launch-Index",):
                     if h in part:
                         _replace_header(n_part, h, str(part[h]))
                 part = n_part
@@ -171,7 +170,7 @@ class UserDataProcessor(object):
             self._attach_part(append_msg, part)
 
     def _attach_launch_index(self, msg):
-        header_idx = msg.get('Launch-Index', None)
+        header_idx = msg.get("Launch-Index", None)
         payload_idx = None
         if msg.get_content_type() in EXAMINE_FOR_LAUNCH_INDEX:
             try:
@@ -179,7 +178,7 @@ class UserDataProcessor(object):
                 # that might affect the final header
                 payload = util.load_yaml(msg.get_payload(decode=True))
                 if payload:
-                    payload_idx = payload.get('launch-index')
+                    payload_idx = payload.get("launch-index")
             except Exception:
                 pass
         # Header overrides contents, for now (?) or the other way around?
@@ -190,14 +189,15 @@ class UserDataProcessor(object):
             payload_idx = header_idx
         if payload_idx is not None:
             try:
-                msg.add_header('Launch-Index', str(int(payload_idx)))
+                msg.add_header("Launch-Index", str(int(payload_idx)))
             except (ValueError, TypeError):
                 pass
 
     def _get_include_once_filename(self, entry):
-        entry_fn = util.hash_blob(entry, 'md5', 64)
-        return os.path.join(self.paths.get_ipath_cur('data'),
-                            'urlcache', entry_fn)
+        entry_fn = util.hash_blob(entry, "md5", 64)
+        return os.path.join(
+            self.paths.get_ipath_cur("data"), "urlcache", entry_fn
+        )
 
     def _process_before_attach(self, msg, attached_id):
         if not msg.get_filename():
@@ -212,13 +212,13 @@ class UserDataProcessor(object):
         for line in content.splitlines():
             lc_line = line.lower()
             if lc_line.startswith("#include-once"):
-                line = line[len("#include-once"):].lstrip()
+                line = line[len("#include-once") :].lstrip()
                 # Every following include will now
                 # not be refetched.... but will be
                 # re-read from a local urlcache (if it worked)
                 include_once_on = True
             elif lc_line.startswith("#include"):
-                line = line[len("#include"):].lstrip()
+                line = line[len("#include") :].lstrip()
                 # Disable the include once if it was on
                 # if it wasn't, then this has no effect.
                 include_once_on = False
@@ -236,29 +236,37 @@ class UserDataProcessor(object):
                 content = util.load_file(include_once_fn)
             else:
                 try:
-                    resp = read_file_or_url(include_url, timeout=5, retries=10,
-                                            ssl_details=self.ssl_details)
+                    resp = read_file_or_url(
+                        include_url,
+                        timeout=5,
+                        retries=10,
+                        ssl_details=self.ssl_details,
+                    )
                     if include_once_on and resp.ok():
-                        util.write_file(include_once_fn, resp.contents,
-                                        mode=0o600)
+                        util.write_file(
+                            include_once_fn, resp.contents, mode=0o600
+                        )
                     if resp.ok():
                         content = resp.contents
                     else:
                         error_message = (
                             "Fetching from {} resulted in"
                             " a invalid http code of {}".format(
-                                include_url, resp.code))
+                                include_url, resp.code
+                            )
+                        )
                         _handle_error(error_message)
                 except UrlError as urle:
                     message = str(urle)
                     # Older versions of requests.exceptions.HTTPError may not
                     # include the errant url. Append it for clarity in logs.
                     if include_url not in message:
-                        message += ' for url: {0}'.format(include_url)
+                        message += " for url: {0}".format(include_url)
                     _handle_error(message, urle)
                 except IOError as ioe:
                     error_message = "Fetching from {} resulted in {}".format(
-                        include_url, ioe)
+                        include_url, ioe
+                    )
                     _handle_error(error_message, ioe)
 
             if content is not None:
@@ -275,20 +283,20 @@ class UserDataProcessor(object):
             # or
             #  scalar(payload)
             if isinstance(ent, str):
-                ent = {'content': ent}
+                ent = {"content": ent}
             if not isinstance(ent, (dict)):
                 # TODO(harlowja) raise?
                 continue
 
-            content = ent.get('content', '')
-            mtype = ent.get('type')
+            content = ent.get("content", "")
+            mtype = ent.get("type")
             if not mtype:
                 default = ARCHIVE_UNDEF_TYPE
                 if isinstance(content, bytes):
                     default = ARCHIVE_UNDEF_BINARY_TYPE
                 mtype = handlers.type_from_starts_with(content, default)
 
-            maintype, subtype = mtype.split('/', 1)
+            maintype, subtype = mtype.split("/", 1)
             if maintype == "text":
                 if isinstance(content, bytes):
                     content = content.decode()
@@ -297,16 +305,21 @@ class UserDataProcessor(object):
                 msg = MIMEBase(maintype, subtype)
                 msg.set_payload(content)
 
-            if 'filename' in ent:
-                _set_filename(msg, ent['filename'])
-            if 'launch-index' in ent:
-                msg.add_header('Launch-Index', str(ent['launch-index']))
+            if "filename" in ent:
+                _set_filename(msg, ent["filename"])
+            if "launch-index" in ent:
+                msg.add_header("Launch-Index", str(ent["launch-index"]))
 
             for header in list(ent.keys()):
-                if header.lower() in ('content', 'filename', 'type',
-                                      'launch-index', 'content-disposition',
-                                      ATTACHMENT_FIELD.lower(),
-                                      CONTENT_TYPE.lower()):
+                if header.lower() in (
+                    "content",
+                    "filename",
+                    "type",
+                    "launch-index",
+                    "content-disposition",
+                    ATTACHMENT_FIELD.lower(),
+                    CONTENT_TYPE.lower(),
+                ):
                     continue
                 msg.add_header(header, ent[header])
 
@@ -318,7 +331,7 @@ class UserDataProcessor(object):
         at its 'Number-Attachments' header.
         """
         if ATTACHMENT_FIELD not in outer_msg:
-            outer_msg[ATTACHMENT_FIELD] = '0'
+            outer_msg[ATTACHMENT_FIELD] = "0"
 
         if new_count is not None:
             _replace_header(outer_msg, ATTACHMENT_FIELD, str(new_count))
@@ -344,8 +357,8 @@ class UserDataProcessor(object):
 
 def is_skippable(part):
     # multipart/* are just containers
-    part_maintype = part.get_content_maintype() or ''
-    if part_maintype.lower() == 'multipart':
+    part_maintype = part.get_content_maintype() or ""
+    if part_maintype.lower() == "multipart":
         return True
     return False
 
@@ -355,7 +368,7 @@ def convert_string(raw_data, content_type=NOT_MULTIPART_TYPE):
     """convert a string (more likely bytes) or a message into
     a mime message."""
     if not raw_data:
-        raw_data = b''
+        raw_data = b""
 
     def create_binmsg(data, content_type):
         maintype, subtype = content_type.split("/", 1)
@@ -364,12 +377,12 @@ def convert_string(raw_data, content_type=NOT_MULTIPART_TYPE):
         return msg
 
     if isinstance(raw_data, str):
-        bdata = raw_data.encode('utf-8')
+        bdata = raw_data.encode("utf-8")
     else:
         bdata = raw_data
     bdata = util.decomp_gzip(bdata, decode=False)
     if b"mime-version:" in bdata[0:4096].lower():
-        msg = util.message_from_string(bdata.decode('utf-8'))
+        msg = util.message_from_string(bdata.decode("utf-8"))
     else:
         msg = create_binmsg(bdata, content_type)
 
diff --git a/cloudinit/util.py b/cloudinit/util.py
index 27821de5..569fc215 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -34,15 +34,15 @@ import time
 from base64 import b64decode, b64encode
 from errno import ENOENT
 from functools import lru_cache
-from urllib import parse
 from typing import List
+from urllib import parse
 
 from cloudinit import importer
 from cloudinit import log as logging
-from cloudinit import subp
 from cloudinit import (
     mergers,
     safeyaml,
+    subp,
     temp_utils,
     type_utils,
     url_helper,
@@ -55,16 +55,16 @@ LOG = logging.getLogger(__name__)
 
 # Helps cleanup filenames to ensure they aren't FS incompatible
 FN_REPLACEMENTS = {
-    os.sep: '_',
+    os.sep: "_",
 }
-FN_ALLOWED = ('_-.()' + string.digits + string.ascii_letters)
+FN_ALLOWED = "_-.()" + string.digits + string.ascii_letters
 
-TRUE_STRINGS = ('true', '1', 'on', 'yes')
-FALSE_STRINGS = ('off', '0', 'no', 'false')
+TRUE_STRINGS = ("true", "1", "on", "yes")
+FALSE_STRINGS = ("off", "0", "no", "false")
 
 
 def kernel_version():
-    return tuple(map(int, os.uname().release.split('.')[:2]))
+    return tuple(map(int, os.uname().release.split(".")[:2]))
 
 
 @lru_cache()
@@ -74,28 +74,36 @@ def get_dpkg_architecture(target=None):
     N.B. This function is wrapped in functools.lru_cache, so repeated calls
     won't shell out every time.
     """
-    out, _ = subp.subp(['dpkg', '--print-architecture'], capture=True,
-                       target=target)
+    out, _ = subp.subp(
+        ["dpkg", "--print-architecture"], capture=True, target=target
+    )
     return out.strip()
 
 
 @lru_cache()
 def lsb_release(target=None):
-    fmap = {'Codename': 'codename', 'Description': 'description',
-            'Distributor ID': 'id', 'Release': 'release'}
+    fmap = {
+        "Codename": "codename",
+        "Description": "description",
+        "Distributor ID": "id",
+        "Release": "release",
+    }
 
     data = {}
     try:
-        out, _ = subp.subp(['lsb_release', '--all'], capture=True,
-                           target=target)
+        out, _ = subp.subp(
+            ["lsb_release", "--all"], capture=True, target=target
+        )
         for line in out.splitlines():
             fname, _, val = line.partition(":")
             if fname in fmap:
                 data[fmap[fname]] = val.strip()
         missing = [k for k in fmap.values() if k not in data]
         if len(missing):
-            LOG.warning("Missing fields in lsb_release --all output: %s",
-                        ','.join(missing))
+            LOG.warning(
+                "Missing fields in lsb_release --all output: %s",
+                ",".join(missing),
+            )
 
     except subp.ProcessExecutionError as err:
         LOG.warning("Unable to get lsb_release --all: %s", err)
@@ -104,14 +112,14 @@ def lsb_release(target=None):
     return data
 
 
-def decode_binary(blob, encoding='utf-8'):
+def decode_binary(blob, encoding="utf-8"):
     # Converts a binary type into a text type using given encoding.
     if isinstance(blob, str):
         return blob
     return blob.decode(encoding)
 
 
-def encode_text(text, encoding='utf-8'):
+def encode_text(text, encoding="utf-8"):
     # Converts a text string into a binary type using given encoding.
     if isinstance(text, bytes):
         return text
@@ -123,7 +131,7 @@ def b64d(source):
     # str/unicode if the result is utf-8 compatible, otherwise returning bytes.
     decoded = b64decode(source)
     try:
-        return decoded.decode('utf-8')
+        return decoded.decode("utf-8")
     except UnicodeDecodeError:
         return decoded
 
@@ -132,8 +140,8 @@ def b64e(source):
     # Base64 encode some data, accepting bytes or unicode/str, and returning
     # str/unicode if the result is utf-8 compatible, otherwise returning bytes.
     if not isinstance(source, bytes):
-        source = source.encode('utf-8')
-    return b64encode(source).decode('utf-8')
+        source = source.encode("utf-8")
+    return b64encode(source).decode("utf-8")
 
 
 def fully_decoded_payload(part):
@@ -143,14 +151,15 @@ def fully_decoded_payload(part):
     # bytes, first try to decode to str via CT charset, and failing that, try
     # utf-8 using surrogate escapes.
     cte_payload = part.get_payload(decode=True)
-    if (part.get_content_maintype() == 'text' and
-            isinstance(cte_payload, bytes)):
+    if part.get_content_maintype() == "text" and isinstance(
+        cte_payload, bytes
+    ):
         charset = part.get_charset()
         if charset and charset.input_codec:
             encoding = charset.input_codec
         else:
-            encoding = 'utf-8'
-        return cte_payload.decode(encoding, 'surrogateescape')
+            encoding = "utf-8"
+        return cte_payload.decode(encoding, "surrogateescape")
     return cte_payload
 
 
@@ -159,7 +168,7 @@ class SeLinuxGuard(object):
         # Late import since it might not always
         # be possible to use this
         try:
-            self.selinux = importer.import_module('selinux')
+            self.selinux = importer.import_module("selinux")
         except ImportError:
             self.selinux = None
         self.path = path
@@ -184,13 +193,20 @@ class SeLinuxGuard(object):
         except OSError:
             return
 
-        LOG.debug("Restoring selinux mode for %s (recursive=%s)",
-                  path, self.recursive)
+        LOG.debug(
+            "Restoring selinux mode for %s (recursive=%s)",
+            path,
+            self.recursive,
+        )
         try:
             self.selinux.restorecon(path, recursive=self.recursive)
         except OSError as e:
-            LOG.warning('restorecon failed on %s,%s maybe badness? %s',
-                        path, self.recursive, e)
+            LOG.warning(
+                "restorecon failed on %s,%s maybe badness? %s",
+                path,
+                self.recursive,
+                e,
+            )
 
 
 class MountFailedError(Exception):
@@ -208,12 +224,18 @@ def fork_cb(child_cb, *args, **kwargs):
             child_cb(*args, **kwargs)
             os._exit(0)
         except Exception:
-            logexc(LOG, "Failed forking and calling callback %s",
-                   type_utils.obj_name(child_cb))
+            logexc(
+                LOG,
+                "Failed forking and calling callback %s",
+                type_utils.obj_name(child_cb),
+            )
             os._exit(1)
     else:
-        LOG.debug("Forked child %s who will run callback %s",
-                  fid, type_utils.obj_name(child_cb))
+        LOG.debug(
+            "Forked child %s who will run callback %s",
+            fid,
+            type_utils.obj_name(child_cb),
+        )
 
 
 def is_true(val, addons=None):
@@ -310,7 +332,7 @@ def clean_filename(fn):
         if k not in FN_ALLOWED:
             removals.append(k)
     for k in removals:
-        fn = fn.replace(k, '')
+        fn = fn.replace(k, "")
     fn = fn.strip()
     return fn
 
@@ -334,7 +356,7 @@ def decomp_gzip(data, quiet=True, decode=True):
 def extract_usergroup(ug_pair):
     if not ug_pair:
         return (None, None)
-    ug_parted = ug_pair.split(':', 1)
+    ug_parted = ug_pair.split(":", 1)
     u = ug_parted[0].strip()
     if len(ug_parted) == 2:
         g = ug_parted[1].strip()
@@ -359,14 +381,20 @@ def find_modules(root_dir) -> dict:
     return entries
 
 
-def multi_log(text, console=True, stderr=True,
-              log=None, log_level=logging.DEBUG, fallback_to_stdout=True):
+def multi_log(
+    text,
+    console=True,
+    stderr=True,
+    log=None,
+    log_level=logging.DEBUG,
+    fallback_to_stdout=True,
+):
     if stderr:
         sys.stderr.write(text)
     if console:
         conpath = "/dev/console"
         if os.path.exists(conpath):
-            with open(conpath, 'w') as wfh:
+            with open(conpath, "w") as wfh:
                 wfh.write(text)
                 wfh.flush()
         elif fallback_to_stdout:
@@ -388,36 +416,36 @@ def multi_log(text, console=True, stderr=True,
 
 @lru_cache()
 def is_Linux():
-    return 'Linux' in platform.system()
+    return "Linux" in platform.system()
 
 
 @lru_cache()
 def is_BSD():
-    if 'BSD' in platform.system():
+    if "BSD" in platform.system():
         return True
-    if platform.system() == 'DragonFly':
+    if platform.system() == "DragonFly":
         return True
     return False
 
 
 @lru_cache()
 def is_FreeBSD():
-    return system_info()['variant'] == "freebsd"
+    return system_info()["variant"] == "freebsd"
 
 
 @lru_cache()
 def is_DragonFlyBSD():
-    return system_info()['variant'] == "dragonfly"
+    return system_info()["variant"] == "dragonfly"
 
 
 @lru_cache()
 def is_NetBSD():
-    return system_info()['variant'] == "netbsd"
+    return system_info()["variant"] == "netbsd"
 
 
 @lru_cache()
 def is_OpenBSD():
-    return system_info()['variant'] == "openbsd"
+    return system_info()["variant"] == "openbsd"
 
 
 def get_cfg_option_bool(yobj, key, default=False):
@@ -447,74 +475,80 @@ def _parse_redhat_release(release_file=None):
     """
 
     if not release_file:
-        release_file = '/etc/redhat-release'
+        release_file = "/etc/redhat-release"
     if not os.path.exists(release_file):
         return {}
     redhat_release = load_file(release_file)
     redhat_regex = (
-        r'(?P<name>.+) release (?P<version>[\d\.]+) '
-        r'\((?P<codename>[^)]+)\)')
+        r"(?P<name>.+) release (?P<version>[\d\.]+) "
+        r"\((?P<codename>[^)]+)\)"
+    )
 
     # Virtuozzo deviates here
     if "Virtuozzo" in redhat_release:
-        redhat_regex = r'(?P<name>.+) release (?P<version>[\d\.]+)'
+        redhat_regex = r"(?P<name>.+) release (?P<version>[\d\.]+)"
 
     match = re.match(redhat_regex, redhat_release)
     if match:
         group = match.groupdict()
 
         # Virtuozzo has no codename in this file
-        if "Virtuozzo" in group['name']:
-            group['codename'] = group['name']
-
-        group['name'] = group['name'].lower().partition(' linux')[0]
-        if group['name'] == 'red hat enterprise':
-            group['name'] = 'redhat'
-        return {'ID': group['name'], 'VERSION_ID': group['version'],
-                'VERSION_CODENAME': group['codename']}
+        if "Virtuozzo" in group["name"]:
+            group["codename"] = group["name"]
+
+        group["name"] = group["name"].lower().partition(" linux")[0]
+        if group["name"] == "red hat enterprise":
+            group["name"] = "redhat"
+        return {
+            "ID": group["name"],
+            "VERSION_ID": group["version"],
+            "VERSION_CODENAME": group["codename"],
+        }
     return {}
 
 
 @lru_cache()
 def get_linux_distro():
-    distro_name = ''
-    distro_version = ''
-    flavor = ''
+    distro_name = ""
+    distro_version = ""
+    flavor = ""
     os_release = {}
     os_release_rhel = False
-    if os.path.exists('/etc/os-release'):
-        os_release = load_shell_content(load_file('/etc/os-release'))
+    if os.path.exists("/etc/os-release"):
+        os_release = load_shell_content(load_file("/etc/os-release"))
     if not os_release:
         os_release_rhel = True
         os_release = _parse_redhat_release()
     if os_release:
-        distro_name = os_release.get('ID', '')
-        distro_version = os_release.get('VERSION_ID', '')
-        if 'sles' in distro_name or 'suse' in distro_name:
+        distro_name = os_release.get("ID", "")
+        distro_version = os_release.get("VERSION_ID", "")
+        if "sles" in distro_name or "suse" in distro_name:
             # RELEASE_BLOCKER: We will drop this sles divergent behavior in
             # the future so that get_linux_distro returns a named tuple
             # which will include both version codename and architecture
             # on all distributions.
             flavor = platform.machine()
-        elif distro_name == 'photon':
-            flavor = os_release.get('PRETTY_NAME', '')
-        elif distro_name == 'virtuozzo' and not os_release_rhel:
+        elif distro_name == "photon":
+            flavor = os_release.get("PRETTY_NAME", "")
+        elif distro_name == "virtuozzo" and not os_release_rhel:
             # Only use this if the redhat file is not parsed
-            flavor = os_release.get('PRETTY_NAME', '')
+            flavor = os_release.get("PRETTY_NAME", "")
         else:
-            flavor = os_release.get('VERSION_CODENAME', '')
+            flavor = os_release.get("VERSION_CODENAME", "")
             if not flavor:
-                match = re.match(r'[^ ]+ \((?P<codename>[^)]+)\)',
-                                 os_release.get('VERSION', ''))
+                match = re.match(
+                    r"[^ ]+ \((?P<codename>[^)]+)\)",
+                    os_release.get("VERSION", ""),
+                )
                 if match:
-                    flavor = match.groupdict()['codename']
-        if distro_name == 'rhel':
-            distro_name = 'redhat'
+                    flavor = match.groupdict()["codename"]
+        if distro_name == "rhel":
+            distro_name = "redhat"
     elif is_BSD():
         distro_name = platform.system().lower()
         distro_version = platform.release()
     else:
-        dist = ('', '', '')
+        dist = ("", "", "")
         try:
             # Was removed in 3.8
             dist = platform.dist()  # pylint: disable=W1505,E1101
@@ -526,36 +560,60 @@ def get_linux_distro():
                 if entry:
                     found = 1
             if not found:
-                LOG.warning('Unable to determine distribution, template '
-                            'expansion may have unexpected results')
+                LOG.warning(
+                    "Unable to determine distribution, template "
+                    "expansion may have unexpected results"
+                )
         return dist
 
     return (distro_name, distro_version, flavor)
 
 
 def _get_variant(info):
-    system = info['system'].lower()
-    variant = 'unknown'
+    system = info["system"].lower()
+    variant = "unknown"
     if system == "linux":
-        linux_dist = info['dist'][0].lower()
+        linux_dist = info["dist"][0].lower()
         if linux_dist in (
-                'almalinux', 'alpine', 'arch', 'centos', 'cloudlinux',
-                'debian', 'eurolinux', 'fedora', 'miraclelinux', 'openeuler',
-                'photon', 'rhel', 'rocky', 'suse', 'virtuozzo'):
+            "almalinux",
+            "alpine",
+            "arch",
+            "centos",
+            "cloudlinux",
+            "debian",
+            "eurolinux",
+            "fedora",
+            "miraclelinux",
+            "openeuler",
+            "photon",
+            "rhel",
+            "rocky",
+            "suse",
+            "virtuozzo",
+        ):
             variant = linux_dist
-        elif linux_dist in ('ubuntu', 'linuxmint', 'mint'):
-            variant = 'ubuntu'
-        elif linux_dist == 'redhat':
-            variant = 'rhel'
+        elif linux_dist in ("ubuntu", "linuxmint", "mint"):
+            variant = "ubuntu"
+        elif linux_dist == "redhat":
+            variant = "rhel"
         elif linux_dist in (
-                'opensuse', 'opensuse-tumbleweed', 'opensuse-leap',
-                'sles', 'sle_hpc'):
-            variant = 'suse'
+            "opensuse",
+            "opensuse-tumbleweed",
+            "opensuse-leap",
+            "sles",
+            "sle_hpc",
+        ):
+            variant = "suse"
         else:
-            variant = 'linux'
+            variant = "linux"
     elif system in (
-            'windows', 'darwin', "freebsd", "netbsd",
-            "openbsd", "dragonfly"):
+        "windows",
+        "darwin",
+        "freebsd",
+        "netbsd",
+        "openbsd",
+        "dragonfly",
+    ):
         variant = system
 
     return variant
@@ -564,14 +622,14 @@ def _get_variant(info):
 @lru_cache()
 def system_info():
     info = {
-        'platform': platform.platform(),
-        'system': platform.system(),
-        'release': platform.release(),
-        'python': platform.python_version(),
-        'uname': list(platform.uname()),
-        'dist': get_linux_distro()
+        "platform": platform.platform(),
+        "system": platform.system(),
+        "release": platform.release(),
+        "python": platform.python_version(),
+        "uname": list(platform.uname()),
+        "dist": get_linux_distro(),
     }
-    info['variant'] = _get_variant(info)
+    info["variant"] = _get_variant(info)
     return info
 
 
@@ -726,23 +784,24 @@ def redirect_output(outfmt, errfmt, o_out=None, o_err=None):
             os.dup2(new_fp.fileno(), o_err.fileno())
 
 
-def make_url(scheme, host, port=None,
-             path='', params='', query='', fragment=''):
+def make_url(
+    scheme, host, port=None, path="", params="", query="", fragment=""
+):
 
-    pieces = [scheme or '']
+    pieces = [scheme or ""]
 
-    netloc = ''
+    netloc = ""
     if host:
         netloc = str(host)
 
     if port is not None:
         netloc += ":" + "%s" % (port)
 
-    pieces.append(netloc or '')
-    pieces.append(path or '')
-    pieces.append(params or '')
-    pieces.append(query or '')
-    pieces.append(fragment or '')
+    pieces.append(netloc or "")
+    pieces.append(path or "")
+    pieces.append(params or "")
+    pieces.append(query or "")
+    pieces.append(fragment or "")
 
     return parse.urlunparse(pieces)
 
@@ -782,8 +841,9 @@ def umask(n_msk):
 
 
 def center(text, fill, max_len):
-    return '{0:{fill}{align}{size}}'.format(text, fill=fill,
-                                            align="^", size=max_len)
+    return "{0:{fill}{align}{size}}".format(
+        text, fill=fill, align="^", size=max_len
+    )
 
 
 def del_dir(path):
@@ -798,9 +858,9 @@ def del_dir(path):
 def read_optional_seed(fill, base="", ext="", timeout=5):
     try:
         (md, ud, vd) = read_seeded(base, ext, timeout)
-        fill['user-data'] = ud
-        fill['vendor-data'] = vd
-        fill['meta-data'] = md
+        fill["user-data"] = ud
+        fill["vendor-data"] = vd
+        fill["meta-data"] = md
         return True
     except url_helper.UrlError as e:
         if e.code == url_helper.NOT_FOUND:
@@ -812,31 +872,33 @@ def fetch_ssl_details(paths=None):
     ssl_details = {}
     # Lookup in these locations for ssl key/cert files
     ssl_cert_paths = [
-        '/var/lib/cloud/data/ssl',
-        '/var/lib/cloud/instance/data/ssl',
+        "/var/lib/cloud/data/ssl",
+        "/var/lib/cloud/instance/data/ssl",
     ]
     if paths:
-        ssl_cert_paths.extend([
-            os.path.join(paths.get_ipath_cur('data'), 'ssl'),
-            os.path.join(paths.get_cpath('data'), 'ssl'),
-        ])
+        ssl_cert_paths.extend(
+            [
+                os.path.join(paths.get_ipath_cur("data"), "ssl"),
+                os.path.join(paths.get_cpath("data"), "ssl"),
+            ]
+        )
     ssl_cert_paths = uniq_merge(ssl_cert_paths)
     ssl_cert_paths = [d for d in ssl_cert_paths if d and os.path.isdir(d)]
     cert_file = None
     for d in ssl_cert_paths:
-        if os.path.isfile(os.path.join(d, 'cert.pem')):
-            cert_file = os.path.join(d, 'cert.pem')
+        if os.path.isfile(os.path.join(d, "cert.pem")):
+            cert_file = os.path.join(d, "cert.pem")
             break
     key_file = None
     for d in ssl_cert_paths:
-        if os.path.isfile(os.path.join(d, 'key.pem')):
-            key_file = os.path.join(d, 'key.pem')
+        if os.path.isfile(os.path.join(d, "key.pem")):
+            key_file = os.path.join(d, "key.pem")
             break
     if cert_file and key_file:
-        ssl_details['cert_file'] = cert_file
-        ssl_details['key_file'] = key_file
+        ssl_details["cert_file"] = cert_file
+        ssl_details["key_file"] = key_file
     elif cert_file:
-        ssl_details['cert_file'] = cert_file
+        ssl_details["cert_file"] = cert_file
     return ssl_details
 
 
@@ -844,32 +906,38 @@ def load_yaml(blob, default=None, allowed=(dict,)):
     loaded = default
     blob = decode_binary(blob)
     try:
-        LOG.debug("Attempting to load yaml from string "
-                  "of length %s with allowed root types %s",
-                  len(blob), allowed)
+        LOG.debug(
+            "Attempting to load yaml from string "
+            "of length %s with allowed root types %s",
+            len(blob),
+            allowed,
+        )
         converted = safeyaml.load(blob)
         if converted is None:
             LOG.debug("loaded blob returned None, returning default.")
             converted = default
         elif not isinstance(converted, allowed):
             # Yes this will just be caught, but thats ok for now...
-            raise TypeError(("Yaml load allows %s root types,"
-                             " but got %s instead") %
-                            (allowed, type_utils.obj_name(converted)))
+            raise TypeError(
+                "Yaml load allows %s root types, but got %s instead"
+                % (allowed, type_utils.obj_name(converted))
+            )
         loaded = converted
     except (safeyaml.YAMLError, TypeError, ValueError) as e:
-        msg = 'Failed loading yaml blob'
+        msg = "Failed loading yaml blob"
         mark = None
-        if hasattr(e, 'context_mark') and getattr(e, 'context_mark'):
-            mark = getattr(e, 'context_mark')
-        elif hasattr(e, 'problem_mark') and getattr(e, 'problem_mark'):
-            mark = getattr(e, 'problem_mark')
+        if hasattr(e, "context_mark") and getattr(e, "context_mark"):
+            mark = getattr(e, "context_mark")
+        elif hasattr(e, "problem_mark") and getattr(e, "problem_mark"):
+            mark = getattr(e, "problem_mark")
         if mark:
             msg += (
                 '. Invalid format at line {line} column {col}: "{err}"'.format(
-                    line=mark.line + 1, col=mark.column + 1, err=e))
+                    line=mark.line + 1, col=mark.column + 1, err=e
+                )
+            )
         else:
-            msg += '. {err}'.format(err=e)
+            msg += ". {err}".format(err=e)
         LOG.warning(msg)
     return loaded
 
@@ -884,22 +952,25 @@ def read_seeded(base="", ext="", timeout=5, retries=10, file_retries=0):
         vd_url = "%s%s%s" % (base, "vendor-data", ext)
         md_url = "%s%s%s" % (base, "meta-data", ext)
 
-    md_resp = url_helper.read_file_or_url(md_url, timeout=timeout,
-                                          retries=retries)
+    md_resp = url_helper.read_file_or_url(
+        md_url, timeout=timeout, retries=retries
+    )
     md = None
     if md_resp.ok():
         md = load_yaml(decode_binary(md_resp.contents), default={})
 
-    ud_resp = url_helper.read_file_or_url(ud_url, timeout=timeout,
-                                          retries=retries)
+    ud_resp = url_helper.read_file_or_url(
+        ud_url, timeout=timeout, retries=retries
+    )
     ud = None
     if ud_resp.ok():
         ud = ud_resp.contents
 
     vd = None
     try:
-        vd_resp = url_helper.read_file_or_url(vd_url, timeout=timeout,
-                                              retries=retries)
+        vd_resp = url_helper.read_file_or_url(
+            vd_url, timeout=timeout, retries=retries
+        )
     except url_helper.UrlError as e:
         LOG.debug("Error in vendor-data response: %s", e)
     else:
@@ -919,8 +990,7 @@ def read_conf_d(confd):
     confs = [f for f in confs if f.endswith(".cfg")]
 
     # Remove anything not a file
-    confs = [f for f in confs
-             if os.path.isfile(os.path.join(confd, f))]
+    confs = [f for f in confs if os.path.isfile(os.path.join(confd, f))]
 
     # Load them all so that they can be merged
     cfgs = []
@@ -935,12 +1005,13 @@ def read_conf_with_confd(cfgfile):
 
     confd = False
     if "conf_d" in cfg:
-        confd = cfg['conf_d']
+        confd = cfg["conf_d"]
         if confd:
             if not isinstance(confd, str):
-                raise TypeError(("Config file %s contains 'conf_d' "
-                                 "with non-string type %s") %
-                                (cfgfile, type_utils.obj_name(confd)))
+                raise TypeError(
+                    "Config file %s contains 'conf_d' with non-string type %s"
+                    % (cfgfile, type_utils.obj_name(confd))
+                )
             else:
                 confd = str(confd).strip()
     elif os.path.isdir("%s.d" % cfgfile):
@@ -984,19 +1055,21 @@ def read_cc_from_cmdline(cmdline=None):
         if end < 0:
             end = clen
         tokens.append(
-            parse.unquote(
-                cmdline[begin + begin_l:end].lstrip()).replace("\\n", "\n"))
+            parse.unquote(cmdline[begin + begin_l : end].lstrip()).replace(
+                "\\n", "\n"
+            )
+        )
         begin = cmdline.find(tag_begin, end + end_l)
 
-    return '\n'.join(tokens)
+    return "\n".join(tokens)
 
 
 def dos2unix(contents):
     # find first end of line
-    pos = contents.find('\n')
-    if pos <= 0 or contents[pos - 1] != '\r':
+    pos = contents.find("\n")
+    if pos <= 0 or contents[pos - 1] != "\r":
         return contents
-    return contents.replace('\r\n', '\n')
+    return contents.replace("\r\n", "\n")
 
 
 def get_hostname_fqdn(cfg, cloud, metadata_only=False):
@@ -1011,20 +1084,20 @@ def get_hostname_fqdn(cfg, cloud, metadata_only=False):
     """
     if "fqdn" in cfg:
         # user specified a fqdn.  Default hostname then is based off that
-        fqdn = cfg['fqdn']
-        hostname = get_cfg_option_str(cfg, "hostname", fqdn.split('.')[0])
+        fqdn = cfg["fqdn"]
+        hostname = get_cfg_option_str(cfg, "hostname", fqdn.split(".")[0])
     else:
-        if "hostname" in cfg and cfg['hostname'].find('.') > 0:
+        if "hostname" in cfg and cfg["hostname"].find(".") > 0:
             # user specified hostname, and it had '.' in it
             # be nice to them.  set fqdn and hostname from that
-            fqdn = cfg['hostname']
-            hostname = cfg['hostname'][:fqdn.find('.')]
+            fqdn = cfg["hostname"]
+            hostname = cfg["hostname"][: fqdn.find(".")]
         else:
             # no fqdn set, get fqdn from cloud.
             # get hostname from cfg if available otherwise cloud
             fqdn = cloud.get_hostname(fqdn=True, metadata_only=metadata_only)
             if "hostname" in cfg:
-                hostname = cfg['hostname']
+                hostname = cfg["hostname"]
             else:
                 hostname = cloud.get_hostname(metadata_only=metadata_only)
     return (hostname, fqdn)
@@ -1085,14 +1158,17 @@ def is_resolvable(name):
     global _DNS_REDIRECT_IP
     if _DNS_REDIRECT_IP is None:
         badips = set()
-        badnames = ("does-not-exist.example.com.", "example.invalid.",
-                    "__cloud_init_expected_not_found__")
+        badnames = (
+            "does-not-exist.example.com.",
+            "example.invalid.",
+            "__cloud_init_expected_not_found__",
+        )
         badresults = {}
         for iname in badnames:
             try:
-                result = socket.getaddrinfo(iname, None, 0, 0,
-                                            socket.SOCK_STREAM,
-                                            socket.AI_CANONNAME)
+                result = socket.getaddrinfo(
+                    iname, None, 0, 0, socket.SOCK_STREAM, socket.AI_CANONNAME
+                )
                 badresults[iname] = []
                 for (_fam, _stype, _proto, cname, sockaddr) in result:
                     badresults[iname].append("%s: %s" % (cname, sockaddr[0]))
@@ -1128,9 +1204,12 @@ def gethostbyaddr(ip):
 
 def is_resolvable_url(url):
     """determine if this url is resolvable (existing or ip)."""
-    return log_time(logfunc=LOG.debug, msg="Resolving URL: " + url,
-                    func=is_resolvable,
-                    args=(parse.urlparse(url).hostname,))
+    return log_time(
+        logfunc=LOG.debug,
+        msg="Resolving URL: " + url,
+        func=is_resolvable,
+        args=(parse.urlparse(url).hostname,),
+    )
 
 
 def search_for_mirror(candidates):
@@ -1166,16 +1245,19 @@ def close_stdin():
         os.dup2(fp.fileno(), sys.stdin.fileno())
 
 
-def find_devs_with_freebsd(criteria=None, oformat='device',
-                           tag=None, no_cache=False, path=None):
+def find_devs_with_freebsd(
+    criteria=None, oformat="device", tag=None, no_cache=False, path=None
+):
     devlist = []
     if not criteria:
         return glob.glob("/dev/msdosfs/*") + glob.glob("/dev/iso9660/*")
     if criteria.startswith("LABEL="):
         label = criteria.lstrip("LABEL=")
         devlist = [
-            p for p in ['/dev/msdosfs/' + label, '/dev/iso9660/' + label]
-            if os.path.exists(p)]
+            p
+            for p in ["/dev/msdosfs/" + label, "/dev/iso9660/" + label]
+            if os.path.exists(p)
+        ]
     elif criteria == "TYPE=vfat":
         devlist = glob.glob("/dev/msdosfs/*")
     elif criteria == "TYPE=iso9660":
@@ -1183,8 +1265,9 @@ def find_devs_with_freebsd(criteria=None, oformat='device',
     return devlist
 
 
-def find_devs_with_netbsd(criteria=None, oformat='device',
-                          tag=None, no_cache=False, path=None):
+def find_devs_with_netbsd(
+    criteria=None, oformat="device", tag=None, no_cache=False, path=None
+):
     devlist = []
     label = None
     _type = None
@@ -1193,55 +1276,65 @@ def find_devs_with_netbsd(criteria=None, oformat='device',
             label = criteria.lstrip("LABEL=")
         if criteria.startswith("TYPE="):
             _type = criteria.lstrip("TYPE=")
-    out, _err = subp.subp(['sysctl', '-n', 'hw.disknames'], rcs=[0])
+    out, _err = subp.subp(["sysctl", "-n", "hw.disknames"], rcs=[0])
     for dev in out.split():
         if label or _type:
-            mscdlabel_out, _ = subp.subp(['mscdlabel', dev], rcs=[0, 1])
+            mscdlabel_out, _ = subp.subp(["mscdlabel", dev], rcs=[0, 1])
         if label and not ('label "%s"' % label) in mscdlabel_out:
             continue
         if _type == "iso9660" and "ISO filesystem" not in mscdlabel_out:
             continue
         if _type == "vfat" and "ISO filesystem" in mscdlabel_out:
             continue
-        devlist.append('/dev/' + dev)
+        devlist.append("/dev/" + dev)
     return devlist
 
 
-def find_devs_with_openbsd(criteria=None, oformat='device',
-                           tag=None, no_cache=False, path=None):
-    out, _err = subp.subp(['sysctl', '-n', 'hw.disknames'], rcs=[0])
+def find_devs_with_openbsd(
+    criteria=None, oformat="device", tag=None, no_cache=False, path=None
+):
+    out, _err = subp.subp(["sysctl", "-n", "hw.disknames"], rcs=[0])
     devlist = []
-    for entry in out.rstrip().split(','):
-        if not entry.endswith(':'):
+    for entry in out.rstrip().split(","):
+        if not entry.endswith(":"):
             # ffs partition with a serial, not a config-drive
             continue
-        if entry == 'fd0:':
+        if entry == "fd0:":
             continue
-        devlist.append(entry[:-1] + 'a')
-        if not entry.startswith('cd'):
-            devlist.append(entry[:-1] + 'i')
-    return ['/dev/' + i for i in devlist]
+        devlist.append(entry[:-1] + "a")
+        if not entry.startswith("cd"):
+            devlist.append(entry[:-1] + "i")
+    return ["/dev/" + i for i in devlist]
 
 
-def find_devs_with_dragonflybsd(criteria=None, oformat='device',
-                                tag=None, no_cache=False, path=None):
-    out, _err = subp.subp(['sysctl', '-n', 'kern.disks'], rcs=[0])
-    devlist = [i for i in sorted(out.split(), reverse=True)
-               if not i.startswith("md") and not i.startswith("vn")]
+def find_devs_with_dragonflybsd(
+    criteria=None, oformat="device", tag=None, no_cache=False, path=None
+):
+    out, _err = subp.subp(["sysctl", "-n", "kern.disks"], rcs=[0])
+    devlist = [
+        i
+        for i in sorted(out.split(), reverse=True)
+        if not i.startswith("md") and not i.startswith("vn")
+    ]
 
     if criteria == "TYPE=iso9660":
-        devlist = [i for i in devlist
-                   if i.startswith('cd') or i.startswith('acd')]
+        devlist = [
+            i for i in devlist if i.startswith("cd") or i.startswith("acd")
+        ]
     elif criteria in ["LABEL=CONFIG-2", "TYPE=vfat"]:
-        devlist = [i for i in devlist
-                   if not (i.startswith('cd') or i.startswith('acd'))]
+        devlist = [
+            i
+            for i in devlist
+            if not (i.startswith("cd") or i.startswith("acd"))
+        ]
     elif criteria:
         LOG.debug("Unexpected criteria: %s", criteria)
-    return ['/dev/' + i for i in devlist]
+    return ["/dev/" + i for i in devlist]
 
 
-def find_devs_with(criteria=None, oformat='device',
-                   tag=None, no_cache=False, path=None):
+def find_devs_with(
+    criteria=None, oformat="device", tag=None, no_cache=False, path=None
+):
     """
     find devices matching given criteria (via blkid)
     criteria can be *one* of:
@@ -1250,19 +1343,17 @@ def find_devs_with(criteria=None, oformat='device',
       UUID=<uuid>
     """
     if is_FreeBSD():
-        return find_devs_with_freebsd(criteria, oformat,
-                                      tag, no_cache, path)
+        return find_devs_with_freebsd(criteria, oformat, tag, no_cache, path)
     elif is_NetBSD():
-        return find_devs_with_netbsd(criteria, oformat,
-                                     tag, no_cache, path)
+        return find_devs_with_netbsd(criteria, oformat, tag, no_cache, path)
     elif is_OpenBSD():
-        return find_devs_with_openbsd(criteria, oformat,
-                                      tag, no_cache, path)
+        return find_devs_with_openbsd(criteria, oformat, tag, no_cache, path)
     elif is_DragonFlyBSD():
-        return find_devs_with_dragonflybsd(criteria, oformat,
-                                           tag, no_cache, path)
+        return find_devs_with_dragonflybsd(
+            criteria, oformat, tag, no_cache, path
+        )
 
-    blk_id_cmd = ['blkid']
+    blk_id_cmd = ["blkid"]
     options = []
     if criteria:
         # Search for block devices with tokens named NAME that
@@ -1284,7 +1375,7 @@ def find_devs_with(criteria=None, oformat='device',
         # Display blkid's output using the specified format.
         # The format parameter may be:
         # full, value, list, device, udev, export
-        options.append('-o%s' % (oformat))
+        options.append("-o%s" % (oformat))
     if path:
         options.append(path)
     cmd = blk_id_cmd + options
@@ -1318,9 +1409,9 @@ def blkid(devs=None, disable_cache=False):
     else:
         devs = list(devs)
 
-    cmd = ['blkid', '-o', 'full']
+    cmd = ["blkid", "-o", "full"]
     if disable_cache:
-        cmd.extend(['-c', '/dev/null'])
+        cmd.extend(["-c", "/dev/null"])
     cmd.extend(devs)
 
     # we have to decode with 'replace' as shelx.split (called by
@@ -1338,7 +1429,7 @@ def blkid(devs=None, disable_cache=False):
 
 def peek_file(fname, max_bytes):
     LOG.debug("Peeking at %s (max_bytes=%s)", fname, max_bytes)
-    with open(fname, 'rb') as ifh:
+    with open(fname, "rb") as ifh:
         return ifh.read(max_bytes)
 
 
@@ -1356,7 +1447,7 @@ def load_file(fname, read_cb=None, quiet=False, decode=True):
     LOG.debug("Reading from %s (quiet=%s)", fname, quiet)
     ofh = io.BytesIO()
     try:
-        with open(fname, 'rb') as ifh:
+        with open(fname, "rb") as ifh:
             pipe_in_out(ifh, ofh, chunk_cb=read_cb)
     except IOError as e:
         if not quiet:
@@ -1391,7 +1482,7 @@ def _get_cmdline():
 
 
 def get_cmdline():
-    if 'DEBUG_PROC_CMDLINE' in os.environ:
+    if "DEBUG_PROC_CMDLINE" in os.environ:
         return os.environ["DEBUG_PROC_CMDLINE"]
 
     return _get_cmdline()
@@ -1444,18 +1535,18 @@ def chownbyname(fname, user=None, group=None):
 # this returns the specific 'mode' entry, cleanly formatted, with value
 def get_output_cfg(cfg, mode):
     ret = [None, None]
-    if not cfg or 'output' not in cfg:
+    if not cfg or "output" not in cfg:
         return ret
 
-    outcfg = cfg['output']
+    outcfg = cfg["output"]
     if mode in outcfg:
         modecfg = outcfg[mode]
     else:
-        if 'all' not in outcfg:
+        if "all" not in outcfg:
             return ret
         # if there is a 'all' item in the output list
         # then it applies to all users of this (init, config, final)
-        modecfg = outcfg['all']
+        modecfg = outcfg["all"]
 
     # if value is a string, it specifies stdout and stderr
     if isinstance(modecfg, str):
@@ -1471,10 +1562,10 @@ def get_output_cfg(cfg, mode):
     # if it is a dictionary, expect 'out' and 'error'
     # items, which indicate out and error
     if isinstance(modecfg, dict):
-        if 'output' in modecfg:
-            ret[0] = modecfg['output']
-        if 'error' in modecfg:
-            ret[1] = modecfg['error']
+        if "output" in modecfg:
+            ret[0] = modecfg["output"]
+        if "error" in modecfg:
+            ret[1] = modecfg["error"]
 
     # if err's entry == "&1", then make it same as stdout
     # as in shell syntax of "echo foo >/dev/null 2>&1"
@@ -1489,7 +1580,7 @@ def get_output_cfg(cfg, mode):
         found = False
         for s in swlist:
             if val.startswith(s):
-                val = "%s %s" % (s, val[len(s):].strip())
+                val = "%s %s" % (s, val[len(s) :].strip())
                 found = True
                 break
         if not found:
@@ -1508,20 +1599,20 @@ def get_config_logfiles(cfg):
     logs = []
     if not cfg or not isinstance(cfg, dict):
         return logs
-    default_log = cfg.get('def_log_file')
+    default_log = cfg.get("def_log_file")
     if default_log:
         logs.append(default_log)
     for fmt in get_output_cfg(cfg, None):
         if not fmt:
             continue
-        match = re.match(r'(?P<type>\||>+)\s*(?P<target>.*)', fmt)
+        match = re.match(r"(?P<type>\||>+)\s*(?P<target>.*)", fmt)
         if not match:
             continue
-        target = match.group('target')
+        target = match.group("target")
         parts = target.split()
         if len(parts) == 1:
             logs.append(target)
-        elif ['tee', '-a'] == parts[:2]:
+        elif ["tee", "-a"] == parts[:2]:
             logs.append(parts[2])
     return list(set(logs))
 
@@ -1586,17 +1677,19 @@ def load_json(text, root_types=(dict,)):
     decoded = json.loads(decode_binary(text))
     if not isinstance(decoded, tuple(root_types)):
         expected_types = ", ".join([str(t) for t in root_types])
-        raise TypeError("(%s) root types expected, got %s instead"
-                        % (expected_types, type(decoded)))
+        raise TypeError(
+            "(%s) root types expected, got %s instead"
+            % (expected_types, type(decoded))
+        )
     return decoded
 
 
 def json_serialize_default(_obj):
     """Handler for types which aren't json serializable."""
     try:
-        return 'ci-b64:{0}'.format(b64e(_obj))
+        return "ci-b64:{0}".format(b64e(_obj))
     except AttributeError:
-        return 'Warning: redacted unserializable type {0}'.format(type(_obj))
+        return "Warning: redacted unserializable type {0}".format(type(_obj))
 
 
 def json_preserialize_binary(data):
@@ -1611,7 +1704,7 @@ def json_preserialize_binary(data):
         if isinstance(value, (dict)):
             data[key] = json_preserialize_binary(value)
         if isinstance(value, bytes):
-            data[key] = 'ci-b64:{0}'.format(b64e(value))
+            data[key] = "ci-b64:{0}".format(b64e(value))
     return data
 
 
@@ -1619,8 +1712,12 @@ def json_dumps(data):
     """Return data in nicely formatted json."""
     try:
         return json.dumps(
-            data, indent=1, sort_keys=True, separators=(',', ': '),
-            default=json_serialize_default)
+            data,
+            indent=1,
+            sort_keys=True,
+            separators=(",", ": "),
+            default=json_serialize_default,
+        )
     except UnicodeDecodeError:
         if sys.version_info[:2] == (2, 7):
             data = json_preserialize_binary(data)
@@ -1655,17 +1752,17 @@ def mounts():
         # Go through mounts to see what is already mounted
         if os.path.exists("/proc/mounts"):
             mount_locs = load_file("/proc/mounts").splitlines()
-            method = 'proc'
+            method = "proc"
         else:
             (mountoutput, _err) = subp.subp("mount")
             mount_locs = mountoutput.splitlines()
-            method = 'mount'
-        mountre = r'^(/dev/[\S]+) on (/.*) \((.+), .+, (.+)\)$'
+            method = "mount"
+        mountre = r"^(/dev/[\S]+) on (/.*) \((.+), .+, (.+)\)$"
         for mpline in mount_locs:
             # Linux: /dev/sda1 on /boot type ext4 (rw,relatime,data=ordered)
             # FreeBSD: /dev/vtbd0p2 on / (ufs, local, journaled soft-updates)
             try:
-                if method == 'proc':
+                if method == "proc":
                     (dev, mp, fstype, opts, _freq, _passno) = mpline.split()
                 else:
                     m = re.search(mountre, mpline)
@@ -1679,9 +1776,9 @@ def mounts():
             # can be escaped as '\040', so undo that..
             mp = mp.replace("\\040", " ")
             mounted[dev] = {
-                'fstype': fstype,
-                'mountpoint': mp,
-                'opts': opts,
+                "fstype": fstype,
+                "mountpoint": mp,
+                "opts": opts,
             }
         LOG.debug("Fetched %s mounts from %s", mounted, method)
     except (IOError, OSError):
@@ -1689,8 +1786,9 @@ def mounts():
     return mounted
 
 
-def mount_cb(device, callback, data=None, mtype=None,
-             update_env_for_mount=None):
+def mount_cb(
+    device, callback, data=None, mtype=None, update_env_for_mount=None
+):
     """
     Mount the device, call method 'callback' passing the directory
     in which it was mounted, then unmount.  Return whatever 'callback'
@@ -1708,8 +1806,10 @@ def mount_cb(device, callback, data=None, mtype=None,
         mtypes = None
     else:
         raise TypeError(
-            'Unsupported type provided for mtype parameter: {_type}'.format(
-                _type=type(mtype)))
+            "Unsupported type provided for mtype parameter: {_type}".format(
+                _type=type(mtype)
+            )
+        )
 
     # clean up 'mtype' input a bit based on platform.
     if is_Linux():
@@ -1717,7 +1817,7 @@ def mount_cb(device, callback, data=None, mtype=None,
             mtypes = ["auto"]
     elif is_BSD():
         if mtypes is None:
-            mtypes = ['ufs', 'cd9660', 'msdos']
+            mtypes = ["ufs", "cd9660", "msdos"]
         for index, mtype in enumerate(mtypes):
             if mtype == "iso9660":
                 mtypes[index] = "cd9660"
@@ -1725,21 +1825,21 @@ def mount_cb(device, callback, data=None, mtype=None,
                 mtypes[index] = "msdos"
     else:
         # we cannot do a smart "auto", so just call 'mount' once with no -t
-        mtypes = ['']
+        mtypes = [""]
 
     mounted = mounts()
     with temp_utils.tempdir() as tmpd:
         umount = False
         if os.path.realpath(device) in mounted:
-            mountpoint = mounted[os.path.realpath(device)]['mountpoint']
+            mountpoint = mounted[os.path.realpath(device)]["mountpoint"]
         else:
             failure_reason = None
             for mtype in mtypes:
                 mountpoint = None
                 try:
-                    mountcmd = ['mount', '-o', 'ro']
+                    mountcmd = ["mount", "-o", "ro"]
                     if mtype:
-                        mountcmd.extend(['-t', mtype])
+                        mountcmd.extend(["-t", mtype])
                     mountcmd.append(device)
                     mountcmd.append(tmpd)
                     subp.subp(mountcmd, update_env=update_env_for_mount)
@@ -1747,14 +1847,21 @@ def mount_cb(device, callback, data=None, mtype=None,
                     mountpoint = tmpd
                     break
                 except (IOError, OSError) as exc:
-                    LOG.debug("Failed to mount device: '%s' with type: '%s' "
-                              "using mount command: '%s', "
-                              "which caused exception: %s",
-                              device, mtype, ' '.join(mountcmd), exc)
+                    LOG.debug(
+                        "Failed to mount device: '%s' with type: '%s' "
+                        "using mount command: '%s', "
+                        "which caused exception: %s",
+                        device,
+                        mtype,
+                        " ".join(mountcmd),
+                        exc,
+                    )
                     failure_reason = exc
             if not mountpoint:
-                raise MountFailedError("Failed mounting %s to %s due to: %s" %
-                                       (device, tmpd, failure_reason))
+                raise MountFailedError(
+                    "Failed mounting %s to %s due to: %s"
+                    % (device, tmpd, failure_reason)
+                )
 
         # Be nice and ensure it ends with a slash
         if not mountpoint.endswith("/"):
@@ -1821,31 +1928,37 @@ def boottime():
     NULL_BYTES = b"\x00"
 
     class timeval(ctypes.Structure):
-        _fields_ = [
-            ("tv_sec", ctypes.c_int64),
-            ("tv_usec", ctypes.c_int64)
-        ]
-    libc = ctypes.CDLL(ctypes.util.find_library('c'))
+        _fields_ = [("tv_sec", ctypes.c_int64), ("tv_usec", ctypes.c_int64)]
+
+    libc = ctypes.CDLL(ctypes.util.find_library("c"))
     size = ctypes.c_size_t()
     size.value = ctypes.sizeof(timeval)
     buf = timeval()
-    if libc.sysctlbyname(b"kern.boottime" + NULL_BYTES, ctypes.byref(buf),
-                         ctypes.byref(size), None, 0) != -1:
+    if (
+        libc.sysctlbyname(
+            b"kern.boottime" + NULL_BYTES,
+            ctypes.byref(buf),
+            ctypes.byref(size),
+            None,
+            0,
+        )
+        != -1
+    ):
         return buf.tv_sec + buf.tv_usec / 1000000.0
     raise RuntimeError("Unable to retrieve kern.boottime on this system")
 
 
 def uptime():
-    uptime_str = '??'
-    method = 'unknown'
+    uptime_str = "??"
+    method = "unknown"
     try:
         if os.path.exists("/proc/uptime"):
-            method = '/proc/uptime'
+            method = "/proc/uptime"
             contents = load_file("/proc/uptime")
             if contents:
                 uptime_str = contents.split()[0]
         else:
-            method = 'ctypes'
+            method = "ctypes"
             # This is the *BSD codepath
             uptime_str = str(time.time() - boottime())
 
@@ -1862,7 +1975,7 @@ def ensure_file(
     path, mode: int = 0o644, *, preserve_mode: bool = False
 ) -> None:
     write_file(
-        path, content='', omode="ab", mode=mode, preserve_mode=preserve_mode
+        path, content="", omode="ab", mode=mode, preserve_mode=preserve_mode
     )
 
 
@@ -1973,18 +2086,24 @@ def write_file(
 
     if ensure_dir_exists:
         ensure_dir(os.path.dirname(filename))
-    if 'b' in omode.lower():
+    if "b" in omode.lower():
         content = encode_text(content)
-        write_type = 'bytes'
+        write_type = "bytes"
     else:
         content = decode_binary(content)
-        write_type = 'characters'
+        write_type = "characters"
     try:
         mode_r = "%o" % mode
     except TypeError:
         mode_r = "%r" % mode
-    LOG.debug("Writing to %s - %s: [%s] %s %s",
-              filename, omode, mode_r, len(content), write_type)
+    LOG.debug(
+        "Writing to %s - %s: [%s] %s %s",
+        filename,
+        omode,
+        mode_r,
+        len(content),
+        write_type,
+    )
     with SeLinuxGuard(path=filename):
         with open(filename, omode) as fh:
             fh.write(content)
@@ -2006,7 +2125,7 @@ def delete_dir_contents(dirname):
             del_file(node_fullpath)
 
 
-def make_header(comment_char="#", base='created'):
+def make_header(comment_char="#", base="created"):
     ci_ver = version.version_string()
     header = str(comment_char)
     header += " %s by cloud-init v. %s" % (base.title(), ci_ver)
@@ -2025,13 +2144,14 @@ def abs_join(base, *paths):
 def shellify(cmdlist, add_header=True):
     if not isinstance(cmdlist, (tuple, list)):
         raise TypeError(
-            "Input to shellify was type '%s'. Expected list or tuple." %
-            (type_utils.obj_name(cmdlist)))
+            "Input to shellify was type '%s'. Expected list or tuple."
+            % (type_utils.obj_name(cmdlist))
+        )
 
-    content = ''
+    content = ""
     if add_header:
         content += "#!/bin/sh\n"
-    escaped = "%s%s%s%s" % ("'", '\\', "'", "'")
+    escaped = "%s%s%s%s" % ("'", "\\", "'", "'")
     cmds_made = 0
     for args in cmdlist:
         # If the item is a list, wrap all items in single tick.
@@ -2040,7 +2160,7 @@ def shellify(cmdlist, add_header=True):
             fixed = []
             for f in args:
                 fixed.append("'%s'" % (str(f).replace("'", escaped)))
-            content = "%s%s\n" % (content, ' '.join(fixed))
+            content = "%s%s\n" % (content, " ".join(fixed))
             cmds_made += 1
         elif isinstance(args, str):
             content = "%s%s\n" % (content, args)
@@ -2051,7 +2171,8 @@ def shellify(cmdlist, add_header=True):
         else:
             raise TypeError(
                 "Unable to shellify type '%s'. Expected list, string, tuple. "
-                "Got: %s" % (type_utils.obj_name(args), args))
+                "Got: %s" % (type_utils.obj_name(args), args)
+            )
 
     LOG.debug("Shellified %s commands.", cmds_made)
     return content
@@ -2059,9 +2180,9 @@ def shellify(cmdlist, add_header=True):
 
 def strip_prefix_suffix(line, prefix=None, suffix=None):
     if prefix and line.startswith(prefix):
-        line = line[len(prefix):]
+        line = line[len(prefix) :]
     if suffix and line.endswith(suffix):
-        line = line[:-len(suffix)]
+        line = line[: -len(suffix)]
     return line
 
 
@@ -2106,7 +2227,8 @@ def is_container():
         _is_container_systemd,
         _is_container_freebsd,
         _is_container_upstart,
-        _is_container_old_lxc)
+        _is_container_old_lxc,
+    )
 
     for helper in checks:
         if helper():
@@ -2145,10 +2267,10 @@ def is_container():
 
 def is_lxd():
     """Check to see if we are running in a lxd container."""
-    return os.path.exists('/dev/lxd/sock')
+    return os.path.exists("/dev/lxd/sock")
 
 
-def get_proc_env(pid, encoding='utf-8', errors='replace'):
+def get_proc_env(pid, encoding="utf-8", errors="replace"):
     """
     Return the environment in a dict that a given process id was started with.
 
@@ -2228,7 +2350,7 @@ def parse_mount_info(path, mountinfo_lines, log=LOG, get_mnt_opts=False):
     """Return the mount information for PATH given the lines from
     /proc/$$/mountinfo."""
 
-    path_elements = [e for e in path.split('/') if e]
+    path_elements = [e for e in path.split("/") if e]
     devpth = None
     fs_type = None
     match_mount_point = None
@@ -2243,12 +2365,13 @@ def parse_mount_info(path, mountinfo_lines, log=LOG, get_mnt_opts=False):
 
         # The minimum number of elements in a valid line is 10.
         if len(parts) < 10:
-            log.debug("Line %d has two few columns (%d): %s",
-                      i + 1, len(parts), line)
+            log.debug(
+                "Line %d has two few columns (%d): %s", i + 1, len(parts), line
+            )
             return None
 
         mount_point = parts[4]
-        mount_point_elements = [e for e in mount_point.split('/') if e]
+        mount_point_elements = [e for e in mount_point.split("/") if e]
 
         # Ignore mounts deeper than the path in question.
         if len(mount_point_elements) > len(path_elements):
@@ -2261,18 +2384,20 @@ def parse_mount_info(path, mountinfo_lines, log=LOG, get_mnt_opts=False):
 
         # Ignore mount points higher than an already seen mount
         # point.
-        if (match_mount_point_elements is not None and
-                len(match_mount_point_elements) > len(mount_point_elements)):
+        if match_mount_point_elements is not None and len(
+            match_mount_point_elements
+        ) > len(mount_point_elements):
             continue
 
         # Find the '-' which terminates a list of optional columns to
         # find the filesystem type and the path to the device.  See
         # man 5 proc for the format of this file.
         try:
-            i = parts.index('-')
+            i = parts.index("-")
         except ValueError:
-            log.debug("Did not find column named '-' in line %d: %s",
-                      i + 1, line)
+            log.debug(
+                "Did not find column named '-' in line %d: %s", i + 1, line
+            )
             return None
 
         # Get the path to the device.
@@ -2280,8 +2405,9 @@ def parse_mount_info(path, mountinfo_lines, log=LOG, get_mnt_opts=False):
             fs_type = parts[i + 1]
             devpth = parts[i + 2]
         except IndexError:
-            log.debug("Too few columns after '-' column in line %d: %s",
-                      i + 1, line)
+            log.debug(
+                "Too few columns after '-' column in line %d: %s", i + 1, line
+            )
             return None
 
         match_mount_point = mount_point
@@ -2308,12 +2434,12 @@ def parse_mtab(path):
 
 
 def find_freebsd_part(fs):
-    splitted = fs.split('/')
+    splitted = fs.split("/")
     if len(splitted) == 3:
         return splitted[2]
-    elif splitted[2] in ['label', 'gpt', 'ufs']:
+    elif splitted[2] in ["label", "gpt", "ufs"]:
         target_label = fs[5:]
-        (part, _err) = subp.subp(['glabel', 'status', '-s'])
+        (part, _err) = subp.subp(["glabel", "status", "-s"])
         for labels in part.split("\n"):
             items = labels.split()
             if len(items) > 0 and items[0] == target_label:
@@ -2325,8 +2451,8 @@ def find_freebsd_part(fs):
 
 
 def find_dragonflybsd_part(fs):
-    splitted = fs.split('/')
-    if len(splitted) == 3 and splitted[1] == 'dev':
+    splitted = fs.split("/")
+    if len(splitted) == 3 and splitted[1] == "dev":
         return splitted[2]
     else:
         LOG.warning("Unexpected input in find_dragonflybsd_part: %s", fs)
@@ -2336,19 +2462,19 @@ def get_path_dev_freebsd(path, mnt_list):
     path_found = None
     for line in mnt_list.split("\n"):
         items = line.split()
-        if (len(items) > 2 and os.path.exists(items[1] + path)):
+        if len(items) > 2 and os.path.exists(items[1] + path):
             path_found = line
             break
     return path_found
 
 
 def get_mount_info_freebsd(path):
-    (result, err) = subp.subp(['mount', '-p', path], rcs=[0, 1])
+    (result, err) = subp.subp(["mount", "-p", path], rcs=[0, 1])
     if len(err):
         # find a path if the input is not a mounting point
-        (mnt_list, err) = subp.subp(['mount', '-p'])
+        (mnt_list, err) = subp.subp(["mount", "-p"])
         path_found = get_path_dev_freebsd(path, mnt_list)
-        if (path_found is None):
+        if path_found is None:
             return None
         result = path_found
     ret = result.split()
@@ -2358,17 +2484,17 @@ def get_mount_info_freebsd(path):
 
 def get_device_info_from_zpool(zpool):
     # zpool has 10 second timeout waiting for /dev/zfs LP: #1760173
-    if not os.path.exists('/dev/zfs'):
-        LOG.debug('Cannot get zpool info, no /dev/zfs')
+    if not os.path.exists("/dev/zfs"):
+        LOG.debug("Cannot get zpool info, no /dev/zfs")
         return None
     try:
-        (zpoolstatus, err) = subp.subp(['zpool', 'status', zpool])
+        (zpoolstatus, err) = subp.subp(["zpool", "status", zpool])
     except subp.ProcessExecutionError as err:
         LOG.warning("Unable to get zpool status of %s: %s", zpool, err)
         return None
     if len(err):
         return None
-    r = r'.*(ONLINE).*'
+    r = r".*(ONLINE).*"
     for line in zpoolstatus.split("\n"):
         if re.search(r, line) and zpool not in line and "state" not in line:
             disk = line.split()[0]
@@ -2377,17 +2503,21 @@ def get_device_info_from_zpool(zpool):
 
 
 def parse_mount(path):
-    (mountoutput, _err) = subp.subp(['mount'])
+    (mountoutput, _err) = subp.subp(["mount"])
     mount_locs = mountoutput.splitlines()
     # there are 2 types of mount outputs we have to parse therefore
     # the regex is a bit complex. to better understand this regex see:
     # https://regex101.com/r/2F6c1k/1
     # https://regex101.com/r/T2en7a/1
-    regex = (r'^(/dev/[\S]+|.*zroot\S*?) on (/[\S]*) '
-             r'(?=(?:type)[\s]+([\S]+)|\(([^,]*))')
+    regex = (
+        r"^(/dev/[\S]+|.*zroot\S*?) on (/[\S]*) "
+        r"(?=(?:type)[\s]+([\S]+)|\(([^,]*))"
+    )
     if is_DragonFlyBSD():
-        regex = (r'^(/dev/[\S]+|\S*?) on (/[\S]*) '
-                 r'(?=(?:type)[\s]+([\S]+)|\(([^,]*))')
+        regex = (
+            r"^(/dev/[\S]+|\S*?) on (/[\S]*) "
+            r"(?=(?:type)[\s]+([\S]+)|\(([^,]*))"
+        )
     for line in mount_locs:
         m = re.search(regex, line)
         if not m:
@@ -2399,15 +2529,19 @@ def parse_mount(path):
         fs_type = m.group(3)
         if fs_type is None:
             fs_type = m.group(4)
-        LOG.debug('found line in mount -> devpth: %s, mount_point: %s, '
-                  'fs_type: %s', devpth, mount_point, fs_type)
+        LOG.debug(
+            "found line in mount -> devpth: %s, mount_point: %s, fs_type: %s",
+            devpth,
+            mount_point,
+            fs_type,
+        )
         # check whether the dev refers to a label on FreeBSD
         # for example, if dev is '/dev/label/rootfs', we should
         # continue finding the real device like '/dev/da0'.
         # this is only valid for non zfs file systems as a zpool
         # can have gpt labels as disk.
-        devm = re.search('^(/dev/.+)p([0-9])$', devpth)
-        if not devm and is_FreeBSD() and fs_type != 'zfs':
+        devm = re.search("^(/dev/.+)p([0-9])$", devpth)
+        if not devm and is_FreeBSD() and fs_type != "zfs":
             return get_mount_info_freebsd(path)
         elif mount_point == path:
             return devpth, fs_type, mount_point
@@ -2443,7 +2577,7 @@ def get_mount_info(path, log=LOG, get_mnt_opts=False):
     #
     # So use /proc/$$/mountinfo to find the device underlying the
     # input path.
-    mountinfo_path = '/proc/%s/mountinfo' % os.getpid()
+    mountinfo_path = "/proc/%s/mountinfo" % os.getpid()
     if os.path.exists(mountinfo_path):
         lines = load_file(mountinfo_path).splitlines()
         return parse_mount_info(path, lines, log, get_mnt_opts)
@@ -2521,7 +2655,8 @@ def pathprefix2dict(base, required=None, optional=None, delim=os.path.sep):
 
     if len(missing):
         raise ValueError(
-            'Missing required files: {files}'.format(files=','.join(missing)))
+            "Missing required files: {files}".format(files=",".join(missing))
+        )
 
     return ret
 
@@ -2529,16 +2664,19 @@ def pathprefix2dict(base, required=None, optional=None, delim=os.path.sep):
 def read_meminfo(meminfo="/proc/meminfo", raw=False):
     # read a /proc/meminfo style file and return
     # a dict with 'total', 'free', and 'available'
-    mpliers = {'kB': 2 ** 10, 'mB': 2 ** 20, 'B': 1, 'gB': 2 ** 30}
-    kmap = {'MemTotal:': 'total', 'MemFree:': 'free',
-            'MemAvailable:': 'available'}
+    mpliers = {"kB": 2 ** 10, "mB": 2 ** 20, "B": 1, "gB": 2 ** 30}
+    kmap = {
+        "MemTotal:": "total",
+        "MemFree:": "free",
+        "MemAvailable:": "available",
+    }
     ret = {}
     for line in load_file(meminfo).splitlines():
         try:
             key, value, unit = line.split()
         except ValueError:
             key, value = line.split()
-            unit = 'B'
+            unit = "B"
         if raw:
             ret[key] = int(value) * mpliers[unit]
         elif key in kmap:
@@ -2549,21 +2687,21 @@ def read_meminfo(meminfo="/proc/meminfo", raw=False):
 
 def human2bytes(size):
     """Convert human string or integer to size in bytes
-      10M => 10485760
-      .5G => 536870912
+    10M => 10485760
+    .5G => 536870912
     """
     size_in = size
     if size.endswith("B"):
         size = size[:-1]
 
-    mpliers = {'B': 1, 'K': 2 ** 10, 'M': 2 ** 20, 'G': 2 ** 30, 'T': 2 ** 40}
+    mpliers = {"B": 1, "K": 2 ** 10, "M": 2 ** 20, "G": 2 ** 30, "T": 2 ** 40}
 
     num = size
-    mplier = 'B'
+    mplier = "B"
     for m in mpliers:
         if size.endswith(m):
             mplier = m
-            num = size[0:-len(m)]
+            num = size[0 : -len(m)]
 
     try:
         num = float(num)
@@ -2580,9 +2718,9 @@ def is_x86(uname_arch=None):
     """Return True if platform is x86-based"""
     if uname_arch is None:
         uname_arch = os.uname()[4]
-    x86_arch_match = (
-        uname_arch == 'x86_64' or
-        (uname_arch[0] == 'i' and uname_arch[2:] == '86'))
+    x86_arch_match = uname_arch == "x86_64" or (
+        uname_arch[0] == "i" and uname_arch[2:] == "86"
+    )
     return x86_arch_match
 
 
@@ -2593,7 +2731,7 @@ def message_from_string(string):
 
 
 def get_installed_packages(target=None):
-    (out, _) = subp.subp(['dpkg-query', '--list'], target=target, capture=True)
+    (out, _) = subp.subp(["dpkg-query", "--list"], target=target, capture=True)
 
     pkgs_inst = set()
     for line in out.splitlines():
@@ -2614,17 +2752,17 @@ def system_is_snappy():
     orpath = "/etc/os-release"
     try:
         orinfo = load_shell_content(load_file(orpath, quiet=True))
-        if orinfo.get('ID', '').lower() == "ubuntu-core":
+        if orinfo.get("ID", "").lower() == "ubuntu-core":
             return True
     except ValueError as e:
         LOG.warning("Unexpected error loading '%s': %s", orpath, e)
 
     cmdline = get_cmdline()
-    if 'snap_core=' in cmdline:
+    if "snap_core=" in cmdline:
         return True
 
     content = load_file("/etc/system-image/channel.ini", quiet=True)
-    if 'ubuntu-core' in content.lower():
+    if "ubuntu-core" in content.lower():
         return True
     if os.path.isdir("/etc/system-image/config.d/"):
         return True
@@ -2636,7 +2774,7 @@ def indent(text, prefix):
     lines = []
     for line in text.splitlines(True):
         lines.append(prefix + line)
-    return ''.join(lines)
+    return "".join(lines)
 
 
 def rootdev_from_cmdline(cmdline):
@@ -2651,12 +2789,13 @@ def rootdev_from_cmdline(cmdline):
     if found.startswith("/dev/"):
         return found
     if found.startswith("LABEL="):
-        return "/dev/disk/by-label/" + found[len("LABEL="):]
+        return "/dev/disk/by-label/" + found[len("LABEL=") :]
     if found.startswith("UUID="):
-        return "/dev/disk/by-uuid/" + found[len("UUID="):].lower()
+        return "/dev/disk/by-uuid/" + found[len("UUID=") :].lower()
     if found.startswith("PARTUUID="):
-        disks_path = ("/dev/disk/by-partuuid/" +
-                      found[len("PARTUUID="):].lower())
+        disks_path = (
+            "/dev/disk/by-partuuid/" + found[len("PARTUUID=") :].lower()
+        )
         if os.path.exists(disks_path):
             return disks_path
         results = find_devs_with(found)
@@ -2671,9 +2810,9 @@ def rootdev_from_cmdline(cmdline):
 
 def load_shell_content(content, add_empty=False, empty_val=None):
     """Given shell like syntax (key=value\nkey2=value2\n) in content
-       return the data in dictionary form.  If 'add_empty' is True
-       then add entries in to the returned dictionary for 'VAR='
-       variables.  Set their value to empty_val."""
+    return the data in dictionary form.  If 'add_empty' is True
+    then add entries in to the returned dictionary for 'VAR='
+    variables.  Set their value to empty_val."""
 
     def _shlex_split(blob):
         return shlex.split(blob, comments=True)
@@ -2689,33 +2828,42 @@ def load_shell_content(content, add_empty=False, empty_val=None):
     return data
 
 
-def wait_for_files(flist, maxwait, naplen=.5, log_pre=""):
+def wait_for_files(flist, maxwait, naplen=0.5, log_pre=""):
     need = set(flist)
     waited = 0
     while True:
         need -= set([f for f in need if os.path.exists(f)])
         if len(need) == 0:
-            LOG.debug("%sAll files appeared after %s seconds: %s",
-                      log_pre, waited, flist)
+            LOG.debug(
+                "%sAll files appeared after %s seconds: %s",
+                log_pre,
+                waited,
+                flist,
+            )
             return []
         if waited == 0:
-            LOG.debug("%sWaiting up to %s seconds for the following files: %s",
-                      log_pre, maxwait, flist)
+            LOG.debug(
+                "%sWaiting up to %s seconds for the following files: %s",
+                log_pre,
+                maxwait,
+                flist,
+            )
         if waited + naplen > maxwait:
             break
         time.sleep(naplen)
         waited += naplen
 
-    LOG.debug("%sStill missing files after %s seconds: %s",
-              log_pre, maxwait, need)
+    LOG.debug(
+        "%sStill missing files after %s seconds: %s", log_pre, maxwait, need
+    )
     return need
 
 
 def mount_is_read_write(mount_point):
     """Check whether the given mount point is mounted rw"""
     result = get_mount_info(mount_point, get_mnt_opts=True)
-    mount_opts = result[-1].split(',')
-    return mount_opts[0] == 'rw'
+    mount_opts = result[-1].split(",")
+    return mount_opts[0] == "rw"
 
 
 def udevadm_settle(exists=None, timeout=None):
@@ -2725,9 +2873,9 @@ def udevadm_settle(exists=None, timeout=None):
         # skip the settle if the requested path already exists
         if os.path.exists(exists):
             return
-        settle_cmd.extend(['--exit-if-exists=%s' % exists])
+        settle_cmd.extend(["--exit-if-exists=%s" % exists])
     if timeout:
-        settle_cmd.extend(['--timeout=%s' % timeout])
+        settle_cmd.extend(["--timeout=%s" % timeout])
 
     return subp.subp(settle_cmd)
 
@@ -2740,7 +2888,7 @@ def get_proc_ppid(pid):
     try:
         contents = load_file("/proc/%s/stat" % pid, quiet=True)
     except IOError as e:
-        LOG.warning('Failed to load /proc/%s/stat. %s', pid, e)
+        LOG.warning("Failed to load /proc/%s/stat. %s", pid, e)
     if contents:
         parts = contents.split(" ", 4)
         # man proc says
@@ -2749,7 +2897,7 @@ def get_proc_ppid(pid):
     return ppid
 
 
-def error(msg, rc=1, fmt='Error:\n{}', sys_exit=False):
+def error(msg, rc=1, fmt="Error:\n{}", sys_exit=False):
     """
     Print error to stderr and return or exit
 
@@ -2763,4 +2911,5 @@ def error(msg, rc=1, fmt='Error:\n{}', sys_exit=False):
         sys.exit(rc)
     return rc
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/version.py b/cloudinit/version.py
index ab93f902..6ad90bd3 100644
--- a/cloudinit/version.py
+++ b/cloudinit/version.py
@@ -5,20 +5,21 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 __VERSION__ = "21.4"
-_PACKAGED_VERSION = '@@PACKAGED_VERSION@@'
+_PACKAGED_VERSION = "@@PACKAGED_VERSION@@"
 
 FEATURES = [
     # supports network config version 1
-    'NETWORK_CONFIG_V1',
+    "NETWORK_CONFIG_V1",
     # supports network config version 2 (netplan)
-    'NETWORK_CONFIG_V2',
+    "NETWORK_CONFIG_V2",
 ]
 
 
 def version_string():
     """Extract a version string from cloud-init."""
-    if not _PACKAGED_VERSION.startswith('@@'):
+    if not _PACKAGED_VERSION.startswith("@@"):
         return _PACKAGED_VERSION
     return __VERSION__
 
+
 # vi: ts=4 expandtab
diff --git a/cloudinit/warnings.py b/cloudinit/warnings.py
index 1da90c40..7ddd2f8d 100644
--- a/cloudinit/warnings.py
+++ b/cloudinit/warnings.py
@@ -1,16 +1,16 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
+import os
+import time
+
 from cloudinit import helpers
 from cloudinit import log as logging
 from cloudinit import util
 
-import os
-import time
-
 LOG = logging.getLogger()
 
 WARNINGS = {
-    'non_ec2_md': """
+    "non_ec2_md": """
 This system is using the EC2 Metadata Service, but does not appear to
 be running on Amazon EC2 or one of cloud-init's known platforms that
 provide a EC2 Metadata service. In the future, cloud-init may stop
@@ -35,7 +35,7 @@ putting that content into
 datasource:
  Ec2:
   strict_id: false""",
-    'dsid_missing_source': """
+    "dsid_missing_source": """
 A new feature in cloud-init identified possible datasources for
 this system as:
   {dslist}
@@ -64,8 +64,9 @@ warnings:
 
 def _get_warn_dir(cfg):
     paths = helpers.Paths(
-        path_cfgs=cfg.get('system_info', {}).get('paths', {}))
-    return paths.get_ipath_cur('warnings')
+        path_cfgs=cfg.get("system_info", {}).get("paths", {})
+    )
+    return paths.get_ipath_cur("warnings")
 
 
 def _load_warn_cfg(cfg, name, mode=True, sleep=None):
@@ -77,7 +78,7 @@ def _load_warn_cfg(cfg, name, mode=True, sleep=None):
     if not cfg or not isinstance(cfg, dict):
         return default
 
-    ncfg = util.get_cfg_by_path(cfg, ('warnings', name))
+    ncfg = util.get_cfg_by_path(cfg, ("warnings", name))
     if ncfg is None:
         return default
 
@@ -128,7 +129,8 @@ def show_warning(name, cfg=None, sleep=None, mode=True, **kwargs):
 
     util.write_file(
         os.path.join(_get_warn_dir(cfg), name),
-        topline + "\n".join(fmtlines) + "\n" + topline)
+        topline + "\n".join(fmtlines) + "\n" + topline,
+    )
 
     LOG.warning("%s%s\n%s", topline, "\n".join(fmtlines), closeline)
 
@@ -136,4 +138,5 @@ def show_warning(name, cfg=None, sleep=None, mode=True, **kwargs):
         LOG.debug("sleeping %d seconds for warning '%s'", sleep, name)
         time.sleep(sleep)
 
+
 # vi: ts=4 expandtab
diff --git a/conftest.py b/conftest.py
index f3f8c036..ffcb3233 100644
--- a/conftest.py
+++ b/conftest.py
@@ -138,6 +138,7 @@ def disable_subp_usage(request, fixture_utils):
                 " this either by modifying your test code, or by modifying"
                 " disable_subp_usage to handle precedence."
             )
+
     else:
         # Look this up before our patch is in place, so we have access to
         # the real implementation in side_effect
@@ -203,7 +204,7 @@ def paths(tmpdir):
     return helpers.Paths(dirs)
 
 
-@pytest.fixture(autouse=True, scope='session')
+@pytest.fixture(autouse=True, scope="session")
 def monkeypatch_system_info():
     def my_system_info():
         return {
@@ -213,7 +214,7 @@ def monkeypatch_system_info():
             "python": "invalid",
             "uname": ["invalid"] * 6,
             "dist": ("Distro", "-1.1", "Codename"),
-            "variant": "ubuntu"
+            "variant": "ubuntu",
         }
 
     util.system_info = my_system_info
diff --git a/doc/rtd/conf.py b/doc/rtd/conf.py
index 4316b5d9..d2cb6ae1 100644
--- a/doc/rtd/conf.py
+++ b/doc/rtd/conf.py
@@ -6,10 +6,10 @@ from cloudinit import version
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-sys.path.insert(0, os.path.abspath('../../'))
-sys.path.insert(0, os.path.abspath('../'))
-sys.path.insert(0, os.path.abspath('./'))
-sys.path.insert(0, os.path.abspath('.'))
+sys.path.insert(0, os.path.abspath("../../"))
+sys.path.insert(0, os.path.abspath("../"))
+sys.path.insert(0, os.path.abspath("./"))
+sys.path.insert(0, os.path.abspath("."))
 
 
 # Supress warnings for docs that aren't used yet
@@ -17,8 +17,8 @@ sys.path.insert(0, os.path.abspath('.'))
 # ]
 
 # General information about the project.
-project = 'cloud-init'
-copyright = '2020, Canonical Ltd.'
+project = "cloud-init"
+copyright = "2020, Canonical Ltd."
 
 # -- General configuration ----------------------------------------------------
 
@@ -28,17 +28,17 @@ copyright = '2020, Canonical Ltd.'
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom ones.
 extensions = [
-    'm2r',
-    'sphinx.ext.autodoc',
-    'sphinx.ext.autosectionlabel',
-    'sphinx.ext.viewcode',
+    "m2r",
+    "sphinx.ext.autodoc",
+    "sphinx.ext.autosectionlabel",
+    "sphinx.ext.viewcode",
 ]
 
 # The suffix of source filenames.
-source_suffix = '.rst'
+source_suffix = ".rst"
 
 # The master toctree document.
-master_doc = 'index'
+master_doc = "index"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -47,7 +47,7 @@ version = version.version_string()
 release = version
 
 # Set the default Pygments syntax
-highlight_language = 'yaml'
+highlight_language = "yaml"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
@@ -61,8 +61,8 @@ show_authors = False
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
-html_theme = 'sphinx_rtd_theme'
+html_theme = "sphinx_rtd_theme"
 
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
-html_logo = 'static/logo.png'
+html_logo = "static/logo.png"
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 00000000..26734e62
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,8 @@
+[tool.black]
+line-length = 79
+
+[tool.isort]
+profile = "black"
+line_length = 79
+# We patch logging in main.py before certain imports
+skip = ["cloudinit/cmd/main.py", ".tox", "packages", "tools"]
diff --git a/setup.py b/setup.py
index 100b07fe..e6405ad9 100755
--- a/setup.py
+++ b/setup.py
@@ -8,22 +8,19 @@
 
 # Distutils magic for ec2-init
 
-from glob import glob
-
 import atexit
 import os
+import platform
 import shutil
+import subprocess
 import sys
 import tempfile
-import platform
+from distutils.errors import DistutilsArgError
+from glob import glob
 
 import setuptools
-from setuptools.command.install import install
 from setuptools.command.egg_info import egg_info
-
-from distutils.errors import DistutilsArgError
-
-import subprocess
+from setuptools.command.install import install
 
 RENDERED_TMPD_PREFIX = "RENDERED_TEMPD"
 VARIANT = None
@@ -34,20 +31,20 @@ def is_f(p):
 
 
 def is_generator(p):
-    return '-generator' in p
+    return "-generator" in p
 
 
 def pkg_config_read(library, var):
     fallbacks = {
-        'systemd': {
-            'systemdsystemconfdir': '/etc/systemd/system',
-            'systemdsystemunitdir': '/lib/systemd/system',
-            'systemdsystemgeneratordir': '/lib/systemd/system-generators',
+        "systemd": {
+            "systemdsystemconfdir": "/etc/systemd/system",
+            "systemdsystemunitdir": "/lib/systemd/system",
+            "systemdsystemgeneratordir": "/lib/systemd/system-generators",
         }
     }
-    cmd = ['pkg-config', '--variable=%s' % var, library]
+    cmd = ["pkg-config", "--variable=%s" % var, library]
     try:
-        path = subprocess.check_output(cmd).decode('utf-8')
+        path = subprocess.check_output(cmd).decode("utf-8")
         path = path.strip()
     except Exception:
         path = fallbacks[library][var]
@@ -68,15 +65,15 @@ def in_virtualenv():
 
 
 def get_version():
-    cmd = [sys.executable, 'tools/read-version']
+    cmd = [sys.executable, "tools/read-version"]
     ver = subprocess.check_output(cmd)
-    return ver.decode('utf-8').strip()
+    return ver.decode("utf-8").strip()
 
 
 def read_requires():
-    cmd = [sys.executable, 'tools/read-dependencies']
+    cmd = [sys.executable, "tools/read-dependencies"]
     deps = subprocess.check_output(cmd)
-    return deps.decode('utf-8').splitlines()
+    return deps.decode("utf-8").splitlines()
 
 
 def render_tmpl(template, mode=None):
@@ -90,7 +87,7 @@ def render_tmpl(template, mode=None):
 
     # older versions of tox use bdist (xenial), and then install from there.
     # newer versions just use install.
-    if not (sys.argv[1] == 'install' or sys.argv[1].startswith('bdist*')):
+    if not (sys.argv[1] == "install" or sys.argv[1].startswith("bdist*")):
         return template
 
     tmpl_ext = ".tmpl"
@@ -104,11 +101,20 @@ def render_tmpl(template, mode=None):
     bname = os.path.basename(template).rstrip(tmpl_ext)
     fpath = os.path.join(tmpd, bname)
     if VARIANT:
-        subprocess.run([sys.executable, './tools/render-cloudcfg', '--variant',
-                        VARIANT, template, fpath])
+        subprocess.run(
+            [
+                sys.executable,
+                "./tools/render-cloudcfg",
+                "--variant",
+                VARIANT,
+                template,
+                fpath,
+            ]
+        )
     else:
         subprocess.run(
-            [sys.executable, './tools/render-cloudcfg', template, fpath])
+            [sys.executable, "./tools/render-cloudcfg", template, fpath]
+        )
     if mode:
         os.chmod(fpath, mode)
     # return path relative to setup.py
@@ -116,41 +122,48 @@ def render_tmpl(template, mode=None):
 
 
 # User can set the variant for template rendering
-if '--distro' in sys.argv:
-    idx = sys.argv.index('--distro')
-    VARIANT = sys.argv[idx+1]
-    del sys.argv[idx+1]
-    sys.argv.remove('--distro')
+if "--distro" in sys.argv:
+    idx = sys.argv.index("--distro")
+    VARIANT = sys.argv[idx + 1]
+    del sys.argv[idx + 1]
+    sys.argv.remove("--distro")
 
 INITSYS_FILES = {
-    'sysvinit': [f for f in glob('sysvinit/redhat/*') if is_f(f)],
-    'sysvinit_freebsd': [f for f in glob('sysvinit/freebsd/*') if is_f(f)],
-    'sysvinit_netbsd': [f for f in glob('sysvinit/netbsd/*') if is_f(f)],
-    'sysvinit_deb': [f for f in glob('sysvinit/debian/*') if is_f(f)],
-    'sysvinit_openrc': [f for f in glob('sysvinit/gentoo/*') if is_f(f)],
-    'sysvinit_suse': [f for f in glob('sysvinit/suse/*') if is_f(f)],
-    'systemd': [render_tmpl(f)
-                for f in (glob('systemd/*.tmpl') +
-                          glob('systemd/*.service') +
-                          glob('systemd/*.socket') +
-                          glob('systemd/*.target'))
-                if (is_f(f) and not is_generator(f))],
-    'systemd.generators': [
+    "sysvinit": [f for f in glob("sysvinit/redhat/*") if is_f(f)],
+    "sysvinit_freebsd": [f for f in glob("sysvinit/freebsd/*") if is_f(f)],
+    "sysvinit_netbsd": [f for f in glob("sysvinit/netbsd/*") if is_f(f)],
+    "sysvinit_deb": [f for f in glob("sysvinit/debian/*") if is_f(f)],
+    "sysvinit_openrc": [f for f in glob("sysvinit/gentoo/*") if is_f(f)],
+    "sysvinit_suse": [f for f in glob("sysvinit/suse/*") if is_f(f)],
+    "systemd": [
+        render_tmpl(f)
+        for f in (
+            glob("systemd/*.tmpl")
+            + glob("systemd/*.service")
+            + glob("systemd/*.socket")
+            + glob("systemd/*.target")
+        )
+        if (is_f(f) and not is_generator(f))
+    ],
+    "systemd.generators": [
         render_tmpl(f, mode=0o755)
-        for f in glob('systemd/*') if is_f(f) and is_generator(f)],
-    'upstart': [f for f in glob('upstart/*') if is_f(f)],
+        for f in glob("systemd/*")
+        if is_f(f) and is_generator(f)
+    ],
+    "upstart": [f for f in glob("upstart/*") if is_f(f)],
 }
 INITSYS_ROOTS = {
-    'sysvinit': 'etc/rc.d/init.d',
-    'sysvinit_freebsd': 'usr/local/etc/rc.d',
-    'sysvinit_netbsd': 'usr/local/etc/rc.d',
-    'sysvinit_deb': 'etc/init.d',
-    'sysvinit_openrc': 'etc/init.d',
-    'sysvinit_suse': 'etc/init.d',
-    'systemd': pkg_config_read('systemd', 'systemdsystemunitdir'),
-    'systemd.generators': pkg_config_read('systemd',
-                                          'systemdsystemgeneratordir'),
-    'upstart': 'etc/init/',
+    "sysvinit": "etc/rc.d/init.d",
+    "sysvinit_freebsd": "usr/local/etc/rc.d",
+    "sysvinit_netbsd": "usr/local/etc/rc.d",
+    "sysvinit_deb": "etc/init.d",
+    "sysvinit_openrc": "etc/init.d",
+    "sysvinit_suse": "etc/init.d",
+    "systemd": pkg_config_read("systemd", "systemdsystemunitdir"),
+    "systemd.generators": pkg_config_read(
+        "systemd", "systemdsystemgeneratordir"
+    ),
+    "upstart": "etc/init/",
 }
 INITSYS_TYPES = sorted([f.partition(".")[0] for f in INITSYS_ROOTS.keys()])
 
@@ -161,14 +174,14 @@ USR = "usr"
 ETC = "etc"
 USR_LIB_EXEC = "usr/lib"
 LIB = "lib"
-if os.uname()[0] in ['FreeBSD', 'DragonFly']:
+if os.uname()[0] in ["FreeBSD", "DragonFly"]:
     USR = "usr/local"
     USR_LIB_EXEC = "usr/local/lib"
-elif os.path.isfile('/etc/redhat-release'):
+elif os.path.isfile("/etc/redhat-release"):
     USR_LIB_EXEC = "usr/libexec"
-elif os.path.isfile('/etc/system-release-cpe'):
-    with open('/etc/system-release-cpe') as f:
-        cpe_data = f.read().rstrip().split(':')
+elif os.path.isfile("/etc/system-release-cpe"):
+    with open("/etc/system-release-cpe") as f:
+        cpe_data = f.read().rstrip().split(":")
 
         if cpe_data[1] == "\o":  # noqa: W605
             # URI formatted CPE
@@ -176,7 +189,7 @@ elif os.path.isfile('/etc/system-release-cpe'):
         else:
             # String formatted CPE
             inc = 1
-        (cpe_vendor, cpe_product, cpe_version) = cpe_data[2+inc:5+inc]
+        (cpe_vendor, cpe_product, cpe_version) = cpe_data[2 + inc : 5 + inc]
         if cpe_vendor == "amazon":
             USR_LIB_EXEC = "usr/libexec"
 
@@ -187,16 +200,18 @@ class MyEggInfo(egg_info):
     def find_sources(self):
         ret = egg_info.find_sources(self)
         # update the self.filelist.
-        self.filelist.exclude_pattern(RENDERED_TMPD_PREFIX + ".*",
-                                      is_regex=True)
+        self.filelist.exclude_pattern(
+            RENDERED_TMPD_PREFIX + ".*", is_regex=True
+        )
         # but since mfname is already written we have to update it also.
         mfname = os.path.join(self.egg_info, "SOURCES.txt")
         if os.path.exists(mfname):
             with open(mfname) as fp:
-                files = [f for f in fp
-                         if not f.startswith(RENDERED_TMPD_PREFIX)]
+                files = [
+                    f for f in fp if not f.startswith(RENDERED_TMPD_PREFIX)
+                ]
             with open(mfname, "w") as fp:
-                fp.write(''.join(files))
+                fp.write("".join(files))
         return ret
 
 
@@ -205,9 +220,12 @@ class InitsysInstallData(install):
     init_system = None
     user_options = install.user_options + [
         # This will magically show up in member variable 'init_sys'
-        ('init-system=', None,
-         ('init system(s) to configure (%s) [default: None]' %
-          (", ".join(INITSYS_TYPES)))),
+        (
+            "init-system=",
+            None,
+            "init system(s) to configure (%s) [default: None]"
+            % ", ".join(INITSYS_TYPES),
+        ),
     ]
 
     def initialize_options(self):
@@ -220,26 +238,30 @@ class InitsysInstallData(install):
         if self.init_system and isinstance(self.init_system, str):
             self.init_system = self.init_system.split(",")
 
-        if (len(self.init_system) == 0 and
-                not platform.system().endswith('BSD')):
-            self.init_system = ['systemd']
+        if len(self.init_system) == 0 and not platform.system().endswith(
+            "BSD"
+        ):
+            self.init_system = ["systemd"]
 
         bad = [f for f in self.init_system if f not in INITSYS_TYPES]
         if len(bad) != 0:
             raise DistutilsArgError(
-                "Invalid --init-system: %s" % (','.join(bad)))
+                "Invalid --init-system: %s" % ",".join(bad)
+            )
 
         for system in self.init_system:
             # add data files for anything that starts with '<system>.'
-            datakeys = [k for k in INITSYS_ROOTS
-                        if k.partition(".")[0] == system]
+            datakeys = [
+                k for k in INITSYS_ROOTS if k.partition(".")[0] == system
+            ]
             for k in datakeys:
                 if not INITSYS_FILES[k]:
                     continue
                 self.distribution.data_files.append(
-                    (INITSYS_ROOTS[k], INITSYS_FILES[k]))
+                    (INITSYS_ROOTS[k], INITSYS_FILES[k])
+                )
         # Force that command to reinitialize (with new file list)
-        self.distribution.reinitialize_command('install_data', True)
+        self.distribution.reinitialize_command("install_data", True)
 
 
 if not in_virtualenv():
@@ -251,58 +273,75 @@ if not in_virtualenv():
         INITSYS_ROOTS[k] = "/" + INITSYS_ROOTS[k]
 
 data_files = [
-    (ETC + '/cloud', [render_tmpl("config/cloud.cfg.tmpl")]),
-    (ETC + '/cloud/cloud.cfg.d', glob('config/cloud.cfg.d/*')),
-    (ETC + '/cloud/templates', glob('templates/*')),
-    (USR_LIB_EXEC + '/cloud-init', ['tools/ds-identify',
-                                    'tools/hook-hotplug',
-                                    'tools/uncloud-init',
-                                    'tools/write-ssh-key-fingerprints']),
-    (USR + '/share/bash-completion/completions',
-     ['bash_completion/cloud-init']),
-    (USR + '/share/doc/cloud-init', [f for f in glob('doc/*') if is_f(f)]),
-    (USR + '/share/doc/cloud-init/examples',
-        [f for f in glob('doc/examples/*') if is_f(f)]),
-    (USR + '/share/doc/cloud-init/examples/seed',
-        [f for f in glob('doc/examples/seed/*') if is_f(f)]),
+    (ETC + "/cloud", [render_tmpl("config/cloud.cfg.tmpl")]),
+    (ETC + "/cloud/cloud.cfg.d", glob("config/cloud.cfg.d/*")),
+    (ETC + "/cloud/templates", glob("templates/*")),
+    (
+        USR_LIB_EXEC + "/cloud-init",
+        [
+            "tools/ds-identify",
+            "tools/hook-hotplug",
+            "tools/uncloud-init",
+            "tools/write-ssh-key-fingerprints",
+        ],
+    ),
+    (
+        USR + "/share/bash-completion/completions",
+        ["bash_completion/cloud-init"],
+    ),
+    (USR + "/share/doc/cloud-init", [f for f in glob("doc/*") if is_f(f)]),
+    (
+        USR + "/share/doc/cloud-init/examples",
+        [f for f in glob("doc/examples/*") if is_f(f)],
+    ),
+    (
+        USR + "/share/doc/cloud-init/examples/seed",
+        [f for f in glob("doc/examples/seed/*") if is_f(f)],
+    ),
 ]
-if not platform.system().endswith('BSD'):
-    data_files.extend([
-        (ETC + '/NetworkManager/dispatcher.d/',
-         ['tools/hook-network-manager']),
-        (ETC + '/dhcp/dhclient-exit-hooks.d/', ['tools/hook-dhclient']),
-        (LIB + '/udev/rules.d', [f for f in glob('udev/*.rules')]),
-        (ETC + '/systemd/system/sshd-keygen@.service.d/',
-         ['systemd/disable-sshd-keygen-if-cloud-init-active.conf']),
-    ])
+if not platform.system().endswith("BSD"):
+    data_files.extend(
+        [
+            (
+                ETC + "/NetworkManager/dispatcher.d/",
+                ["tools/hook-network-manager"],
+            ),
+            (ETC + "/dhcp/dhclient-exit-hooks.d/", ["tools/hook-dhclient"]),
+            (LIB + "/udev/rules.d", [f for f in glob("udev/*.rules")]),
+            (
+                ETC + "/systemd/system/sshd-keygen@.service.d/",
+                ["systemd/disable-sshd-keygen-if-cloud-init-active.conf"],
+            ),
+        ]
+    )
 # Use a subclass for install that handles
 # adding on the right init system configuration files
 cmdclass = {
-    'install': InitsysInstallData,
-    'egg_info': MyEggInfo,
+    "install": InitsysInstallData,
+    "egg_info": MyEggInfo,
 }
 
 requirements = read_requires()
 
 setuptools.setup(
-    name='cloud-init',
+    name="cloud-init",
     version=get_version(),
-    description='Cloud instance initialisation magic',
-    author='Scott Moser',
-    author_email='scott.moser@canonical.com',
-    url='http://launchpad.net/cloud-init/',
-    packages=setuptools.find_packages(exclude=['tests.*', 'tests']),
-    scripts=['tools/cloud-init-per'],
-    license='Dual-licensed under GPLv3 or Apache 2.0',
+    description="Cloud instance initialisation magic",
+    author="Scott Moser",
+    author_email="scott.moser@canonical.com",
+    url="http://launchpad.net/cloud-init/",
+    packages=setuptools.find_packages(exclude=["tests.*", "tests"]),
+    scripts=["tools/cloud-init-per"],
+    license="Dual-licensed under GPLv3 or Apache 2.0",
     data_files=data_files,
     install_requires=requirements,
     cmdclass=cmdclass,
     entry_points={
-        'console_scripts': [
-            'cloud-init = cloudinit.cmd.main:main',
-            'cloud-id = cloudinit.cmd.cloud_id:main'
+        "console_scripts": [
+            "cloud-init = cloudinit.cmd.main:main",
+            "cloud-id = cloudinit.cmd.cloud_id:main",
         ],
-    }
+    },
 )
 
 
diff --git a/tests/integration_tests/__init__.py b/tests/integration_tests/__init__.py
index e1d4cd28..81f9b02f 100644
--- a/tests/integration_tests/__init__.py
+++ b/tests/integration_tests/__init__.py
@@ -7,6 +7,8 @@ def random_mac_address() -> str:
     The MAC address will have a 1 in its least significant bit, indicating it
     to be a locally administered address.
     """
-    return "02:00:00:%02x:%02x:%02x" % (random.randint(0, 255),
-                                        random.randint(0, 255),
-                                        random.randint(0, 255))
+    return "02:00:00:%02x:%02x:%02x" % (
+        random.randint(0, 255),
+        random.randint(0, 255),
+        random.randint(0, 255),
+    )
diff --git a/tests/integration_tests/bugs/test_gh570.py b/tests/integration_tests/bugs/test_gh570.py
index 534cfb9a..ddc74503 100644
--- a/tests/integration_tests/bugs/test_gh570.py
+++ b/tests/integration_tests/bugs/test_gh570.py
@@ -4,9 +4,10 @@ Test that we can add optional vendor-data to the seedfrom file in a
 NoCloud environment
 """
 
-from tests.integration_tests.instances import IntegrationInstance
 import pytest
 
+from tests.integration_tests.instances import IntegrationInstance
+
 VENDOR_DATA = """\
 #cloud-config
 runcmd:
@@ -19,7 +20,7 @@ runcmd:
 @pytest.mark.lxd_container
 @pytest.mark.lxd_vm
 def test_nocloud_seedfrom_vendordata(client: IntegrationInstance):
-    seed_dir = '/var/tmp/test_seed_dir'
+    seed_dir = "/var/tmp/test_seed_dir"
     result = client.execute(
         "mkdir {seed_dir} && "
         "touch {seed_dir}/user-data && "
@@ -30,10 +31,10 @@ def test_nocloud_seedfrom_vendordata(client: IntegrationInstance):
     assert result.return_code == 0
 
     client.write_to_file(
-        '{}/vendor-data'.format(seed_dir),
+        "{}/vendor-data".format(seed_dir),
         VENDOR_DATA,
     )
-    client.execute('cloud-init clean --logs')
+    client.execute("cloud-init clean --logs")
     client.restart()
-    assert client.execute('cloud-init status').ok
-    assert 'seeded_vendordata_test_file' in client.execute('ls /var/tmp')
+    assert client.execute("cloud-init status").ok
+    assert "seeded_vendordata_test_file" in client.execute("ls /var/tmp")
diff --git a/tests/integration_tests/bugs/test_gh626.py b/tests/integration_tests/bugs/test_gh626.py
index dba01b34..7c720143 100644
--- a/tests/integration_tests/bugs/test_gh626.py
+++ b/tests/integration_tests/bugs/test_gh626.py
@@ -11,7 +11,6 @@ from tests.integration_tests import random_mac_address
 from tests.integration_tests.clouds import ImageSpecification
 from tests.integration_tests.instances import IntegrationInstance
 
-
 MAC_ADDRESS = random_mac_address()
 NETWORK_CONFIG = """\
 version: 2
@@ -21,7 +20,9 @@ ethernets:
     wakeonlan: true
     match:
       macaddress: {}
-""".format(MAC_ADDRESS)
+""".format(
+    MAC_ADDRESS
+)
 
 EXPECTED_ENI_END = """\
 iface eth0 inet dhcp
@@ -31,17 +32,19 @@ iface eth0 inet dhcp
 @pytest.mark.sru_2020_11
 @pytest.mark.lxd_container
 @pytest.mark.lxd_vm
-@pytest.mark.lxd_config_dict({
-    'user.network-config': NETWORK_CONFIG,
-    "volatile.eth0.hwaddr": MAC_ADDRESS,
-})
+@pytest.mark.lxd_config_dict(
+    {
+        "user.network-config": NETWORK_CONFIG,
+        "volatile.eth0.hwaddr": MAC_ADDRESS,
+    }
+)
 def test_wakeonlan(client: IntegrationInstance):
-    if ImageSpecification.from_os_image().release == 'xenial':
-        eni = client.execute('cat /etc/network/interfaces.d/50-cloud-init.cfg')
+    if ImageSpecification.from_os_image().release == "xenial":
+        eni = client.execute("cat /etc/network/interfaces.d/50-cloud-init.cfg")
         assert eni.endswith(EXPECTED_ENI_END)
         return
 
-    netplan_cfg = client.execute('cat /etc/netplan/50-cloud-init.yaml')
+    netplan_cfg = client.execute("cat /etc/netplan/50-cloud-init.yaml")
     netplan_yaml = yaml.safe_load(netplan_cfg)
-    assert 'wakeonlan' in netplan_yaml['network']['ethernets']['eth0']
-    assert netplan_yaml['network']['ethernets']['eth0']['wakeonlan'] is True
+    assert "wakeonlan" in netplan_yaml["network"]["ethernets"]["eth0"]
+    assert netplan_yaml["network"]["ethernets"]["eth0"]["wakeonlan"] is True
diff --git a/tests/integration_tests/bugs/test_gh632.py b/tests/integration_tests/bugs/test_gh632.py
index f3702a2e..c7a897c6 100644
--- a/tests/integration_tests/bugs/test_gh632.py
+++ b/tests/integration_tests/bugs/test_gh632.py
@@ -14,18 +14,20 @@ from tests.integration_tests.util import verify_clean_log
 @pytest.mark.lxd_vm
 def test_datasource_rbx_no_stacktrace(client: IntegrationInstance):
     client.write_to_file(
-        '/etc/cloud/cloud.cfg.d/90_dpkg.cfg',
-        'datasource_list: [ RbxCloud, NoCloud ]\n',
+        "/etc/cloud/cloud.cfg.d/90_dpkg.cfg",
+        "datasource_list: [ RbxCloud, NoCloud ]\n",
     )
     client.write_to_file(
-        '/etc/cloud/ds-identify.cfg',
-        'policy: enabled\n',
+        "/etc/cloud/ds-identify.cfg",
+        "policy: enabled\n",
     )
-    client.execute('cloud-init clean --logs')
+    client.execute("cloud-init clean --logs")
     client.restart()
 
-    log = client.read_from_file('/var/log/cloud-init.log')
+    log = client.read_from_file("/var/log/cloud-init.log")
     verify_clean_log(log)
-    assert 'Failed to load metadata and userdata' not in log
-    assert ("Getting data from <class 'cloudinit.sources.DataSourceRbxCloud."
-            "DataSourceRbxCloud'> failed") not in log
+    assert "Failed to load metadata and userdata" not in log
+    assert (
+        "Getting data from <class 'cloudinit.sources.DataSourceRbxCloud."
+        "DataSourceRbxCloud'> failed" not in log
+    )
diff --git a/tests/integration_tests/bugs/test_gh668.py b/tests/integration_tests/bugs/test_gh668.py
index ce57052e..95edb48d 100644
--- a/tests/integration_tests/bugs/test_gh668.py
+++ b/tests/integration_tests/bugs/test_gh668.py
@@ -10,7 +10,6 @@ import pytest
 from tests.integration_tests import random_mac_address
 from tests.integration_tests.instances import IntegrationInstance
 
-
 DESTINATION_IP = "172.16.0.10"
 GATEWAY_IP = "10.0.0.100"
 MAC_ADDRESS = random_mac_address()
@@ -26,17 +25,21 @@ ethernets:
       via: {}
     match:
       macaddress: {}
-""".format(DESTINATION_IP, GATEWAY_IP, MAC_ADDRESS)
+""".format(
+    DESTINATION_IP, GATEWAY_IP, MAC_ADDRESS
+)
 
 EXPECTED_ROUTE = "{} via {}".format(DESTINATION_IP, GATEWAY_IP)
 
 
 @pytest.mark.lxd_container
 @pytest.mark.lxd_vm
-@pytest.mark.lxd_config_dict({
-    "user.network-config": NETWORK_CONFIG,
-    "volatile.eth0.hwaddr": MAC_ADDRESS,
-})
+@pytest.mark.lxd_config_dict(
+    {
+        "user.network-config": NETWORK_CONFIG,
+        "volatile.eth0.hwaddr": MAC_ADDRESS,
+    }
+)
 @pytest.mark.lxd_use_exec
 def test_static_route_to_host(client: IntegrationInstance):
     route = client.execute("ip route | grep {}".format(DESTINATION_IP))
diff --git a/tests/integration_tests/bugs/test_gh671.py b/tests/integration_tests/bugs/test_gh671.py
index 5e90cdda..15f204ee 100644
--- a/tests/integration_tests/bugs/test_gh671.py
+++ b/tests/integration_tests/bugs/test_gh671.py
@@ -11,13 +11,13 @@ import pytest
 
 from tests.integration_tests.clouds import IntegrationCloud
 
-OLD_PASSWORD = 'DoIM33tTheComplexityRequirements!??'
-NEW_PASSWORD = 'DoIM33tTheComplexityRequirementsNow!??'
+OLD_PASSWORD = "DoIM33tTheComplexityRequirements!??"
+NEW_PASSWORD = "DoIM33tTheComplexityRequirementsNow!??"
 
 
 def _check_password(instance, unhashed_password):
-    shadow_password = instance.execute('getent shadow ubuntu').split(':')[1]
-    salt = shadow_password.rsplit('$', 1)[0]
+    shadow_password = instance.execute("getent shadow ubuntu").split(":")[1]
+    salt = shadow_password.rsplit("$", 1)[0]
     hashed_password = crypt.crypt(unhashed_password, salt)
     assert shadow_password == hashed_password
 
@@ -26,29 +26,28 @@ def _check_password(instance, unhashed_password):
 @pytest.mark.sru_2020_11
 def test_update_default_password(setup_image, session_cloud: IntegrationCloud):
     os_profile = {
-        'os_profile': {
-            'admin_password': '',
-            'linux_configuration': {
-                'disable_password_authentication': False
-            }
+        "os_profile": {
+            "admin_password": "",
+            "linux_configuration": {"disable_password_authentication": False},
         }
     }
-    os_profile['os_profile']['admin_password'] = OLD_PASSWORD
-    instance1 = session_cloud.launch(launch_kwargs={'vm_params': os_profile})
+    os_profile["os_profile"]["admin_password"] = OLD_PASSWORD
+    instance1 = session_cloud.launch(launch_kwargs={"vm_params": os_profile})
 
     _check_password(instance1, OLD_PASSWORD)
 
     snapshot_id = instance1.cloud.cloud_instance.snapshot(
-        instance1.instance,
-        delete_provisioned_user=False
+        instance1.instance, delete_provisioned_user=False
     )
 
-    os_profile['os_profile']['admin_password'] = NEW_PASSWORD
+    os_profile["os_profile"]["admin_password"] = NEW_PASSWORD
     try:
-        with session_cloud.launch(launch_kwargs={
-            'image_id': snapshot_id,
-            'vm_params': os_profile,
-        }) as instance2:
+        with session_cloud.launch(
+            launch_kwargs={
+                "image_id": snapshot_id,
+                "vm_params": os_profile,
+            }
+        ) as instance2:
             _check_password(instance2, NEW_PASSWORD)
     finally:
         session_cloud.cloud_instance.delete_image(snapshot_id)
diff --git a/tests/integration_tests/bugs/test_gh868.py b/tests/integration_tests/bugs/test_gh868.py
index 1119d461..a62e8b36 100644
--- a/tests/integration_tests/bugs/test_gh868.py
+++ b/tests/integration_tests/bugs/test_gh868.py
@@ -4,7 +4,6 @@ import pytest
 from tests.integration_tests.instances import IntegrationInstance
 from tests.integration_tests.util import verify_clean_log
 
-
 USERDATA = """\
 #cloud-config
 chef:
@@ -24,5 +23,5 @@ chef:
 @pytest.mark.lxd_vm
 @pytest.mark.user_data(USERDATA)
 def test_chef_license(client: IntegrationInstance):
-    log = client.read_from_file('/var/log/cloud-init.log')
+    log = client.read_from_file("/var/log/cloud-init.log")
     verify_clean_log(log)
diff --git a/tests/integration_tests/bugs/test_lp1813396.py b/tests/integration_tests/bugs/test_lp1813396.py
index 27d41c2b..451a9972 100644
--- a/tests/integration_tests/bugs/test_lp1813396.py
+++ b/tests/integration_tests/bugs/test_lp1813396.py
@@ -8,7 +8,6 @@ import pytest
 from tests.integration_tests.instances import IntegrationInstance
 from tests.integration_tests.util import verify_ordered_items_in_text
 
-
 USER_DATA = """\
 #cloud-config
 apt:
@@ -23,7 +22,7 @@ apt:
 @pytest.mark.sru_2020_11
 @pytest.mark.user_data(USER_DATA)
 def test_gpg_no_tty(client: IntegrationInstance):
-    log = client.read_from_file('/var/log/cloud-init.log')
+    log = client.read_from_file("/var/log/cloud-init.log")
     to_verify = [
         "Running command ['gpg', '--no-tty', "
         "'--keyserver=keyserver.ubuntu.com', '--recv-keys', 'E4D304DF'] "
diff --git a/tests/integration_tests/bugs/test_lp1835584.py b/tests/integration_tests/bugs/test_lp1835584.py
index 732f2179..a800eab4 100644
--- a/tests/integration_tests/bugs/test_lp1835584.py
+++ b/tests/integration_tests/bugs/test_lp1835584.py
@@ -31,12 +31,9 @@ import re
 
 import pytest
 
-from tests.integration_tests.instances import IntegrationAzureInstance
-from tests.integration_tests.clouds import (
-    ImageSpecification, IntegrationCloud
-)
+from tests.integration_tests.clouds import ImageSpecification, IntegrationCloud
 from tests.integration_tests.conftest import get_validated_source
-
+from tests.integration_tests.instances import IntegrationAzureInstance
 
 IMG_AZURE_UBUNTU_PRO_FIPS_BIONIC = (
     "Canonical:0001-com-ubuntu-pro-bionic-fips:pro-fips-18_04:18.04.202010201"
@@ -44,14 +41,12 @@ IMG_AZURE_UBUNTU_PRO_FIPS_BIONIC = (
 
 
 def _check_iid_insensitive_across_kernel_upgrade(
-    instance: IntegrationAzureInstance
+    instance: IntegrationAzureInstance,
 ):
     uuid = instance.read_from_file("/sys/class/dmi/id/product_uuid")
-    assert uuid.isupper(), (
-        "Expected uppercase UUID on Ubuntu FIPS image {}".format(
-            uuid
-        )
-    )
+    assert (
+        uuid.isupper()
+    ), "Expected uppercase UUID on Ubuntu FIPS image {}".format(uuid)
     orig_kernel = instance.execute("uname -r").strip()
     assert "azure-fips" in orig_kernel
     result = instance.execute("apt-get update")
@@ -80,7 +75,7 @@ def _check_iid_insensitive_across_kernel_upgrade(
 @pytest.mark.azure
 @pytest.mark.sru_next
 def test_azure_kernel_upgrade_case_insensitive_uuid(
-    session_cloud: IntegrationCloud
+    session_cloud: IntegrationCloud,
 ):
     cfg_image_spec = ImageSpecification.from_os_image()
     if (cfg_image_spec.os, cfg_image_spec.release) != ("ubuntu", "bionic"):
diff --git a/tests/integration_tests/bugs/test_lp1886531.py b/tests/integration_tests/bugs/test_lp1886531.py
index 6dd61222..d56ca320 100644
--- a/tests/integration_tests/bugs/test_lp1886531.py
+++ b/tests/integration_tests/bugs/test_lp1886531.py
@@ -13,7 +13,6 @@ import pytest
 
 from tests.integration_tests.util import verify_clean_log
 
-
 USER_DATA = """\
 #cloud-config
 bootcmd:
@@ -22,7 +21,6 @@ bootcmd:
 
 
 class TestLp1886531:
-
     @pytest.mark.user_data(USER_DATA)
     def test_lp1886531(self, client):
         log_content = client.read_from_file("/var/log/cloud-init.log")
diff --git a/tests/integration_tests/bugs/test_lp1897099.py b/tests/integration_tests/bugs/test_lp1897099.py
index 27c8927f..876a2887 100644
--- a/tests/integration_tests/bugs/test_lp1897099.py
+++ b/tests/integration_tests/bugs/test_lp1897099.py
@@ -7,7 +7,6 @@ https://bugs.launchpad.net/cloud-init/+bug/1897099
 
 import pytest
 
-
 USER_DATA = """\
 #cloud-config
 bootcmd:
@@ -21,11 +20,11 @@ swap:
 
 @pytest.mark.sru_2020_11
 @pytest.mark.user_data(USER_DATA)
-@pytest.mark.no_container('Containers cannot configure swap')
+@pytest.mark.no_container("Containers cannot configure swap")
 def test_fallocate_fallback(client):
-    log = client.read_from_file('/var/log/cloud-init.log')
-    assert '/swap.img' in client.execute('cat /proc/swaps')
-    assert '/swap.img' in client.execute('cat /etc/fstab')
-    assert 'fallocate swap creation failed, will attempt with dd' in log
+    log = client.read_from_file("/var/log/cloud-init.log")
+    assert "/swap.img" in client.execute("cat /proc/swaps")
+    assert "/swap.img" in client.execute("cat /etc/fstab")
+    assert "fallocate swap creation failed, will attempt with dd" in log
     assert "Running command ['dd', 'if=/dev/zero', 'of=/swap.img'" in log
-    assert 'SUCCESS: config-mounts ran successfully' in log
+    assert "SUCCESS: config-mounts ran successfully" in log
diff --git a/tests/integration_tests/bugs/test_lp1898997.py b/tests/integration_tests/bugs/test_lp1898997.py
index 909bc690..115bd34f 100644
--- a/tests/integration_tests/bugs/test_lp1898997.py
+++ b/tests/integration_tests/bugs/test_lp1898997.py
@@ -33,13 +33,17 @@ ethernets:
       match:
           macaddress: {}
 version: 2
-""".format(MAC_ADDRESS)
+""".format(
+    MAC_ADDRESS
+)
 
 
-@pytest.mark.lxd_config_dict({
-    "user.network-config": NETWORK_CONFIG,
-    "volatile.eth0.hwaddr": MAC_ADDRESS,
-})
+@pytest.mark.lxd_config_dict(
+    {
+        "user.network-config": NETWORK_CONFIG,
+        "volatile.eth0.hwaddr": MAC_ADDRESS,
+    }
+)
 @pytest.mark.lxd_vm
 @pytest.mark.lxd_use_exec
 @pytest.mark.not_bionic
diff --git a/tests/integration_tests/bugs/test_lp1900837.py b/tests/integration_tests/bugs/test_lp1900837.py
index fcc2b751..3df10883 100644
--- a/tests/integration_tests/bugs/test_lp1900837.py
+++ b/tests/integration_tests/bugs/test_lp1900837.py
@@ -23,7 +23,7 @@ class TestLogPermissionsNotResetOnReboot:
 
         # Reboot
         client.restart()
-        assert client.execute('cloud-init status').ok
+        assert client.execute("cloud-init status").ok
 
         # Check that permissions are not reset on reboot
         assert "600" == _get_log_perms(client)
diff --git a/tests/integration_tests/bugs/test_lp1901011.py b/tests/integration_tests/bugs/test_lp1901011.py
index 2b47f0a8..7de8bd77 100644
--- a/tests/integration_tests/bugs/test_lp1901011.py
+++ b/tests/integration_tests/bugs/test_lp1901011.py
@@ -10,12 +10,16 @@ from tests.integration_tests.clouds import IntegrationCloud
 
 
 @pytest.mark.azure
-@pytest.mark.parametrize('instance_type,is_ephemeral', [
-    ('Standard_DS1_v2', True),
-    ('Standard_D2s_v4', False),
-])
-def test_ephemeral(instance_type, is_ephemeral,
-                   session_cloud: IntegrationCloud, setup_image):
+@pytest.mark.parametrize(
+    "instance_type,is_ephemeral",
+    [
+        ("Standard_DS1_v2", True),
+        ("Standard_D2s_v4", False),
+    ],
+)
+def test_ephemeral(
+    instance_type, is_ephemeral, session_cloud: IntegrationCloud, setup_image
+):
     if is_ephemeral:
         expected_log = (
             "Ephemeral resource disk '/dev/disk/cloud/azure_resource' exists. "
@@ -29,30 +33,35 @@ def test_ephemeral(instance_type, is_ephemeral,
         )
 
     with session_cloud.launch(
-        launch_kwargs={'instance_type': instance_type}
+        launch_kwargs={"instance_type": instance_type}
     ) as client:
         # Verify log file
-        log = client.read_from_file('/var/log/cloud-init.log')
+        log = client.read_from_file("/var/log/cloud-init.log")
         assert expected_log in log
 
         # Verify devices
-        dev_links = client.execute('ls /dev/disk/cloud')
-        assert 'azure_root' in dev_links
-        assert 'azure_root-part1' in dev_links
+        dev_links = client.execute("ls /dev/disk/cloud")
+        assert "azure_root" in dev_links
+        assert "azure_root-part1" in dev_links
         if is_ephemeral:
-            assert 'azure_resource' in dev_links
-            assert 'azure_resource-part1' in dev_links
+            assert "azure_resource" in dev_links
+            assert "azure_resource-part1" in dev_links
 
         # Verify mounts
-        blks = client.execute('lsblk -pPo NAME,TYPE,MOUNTPOINT')
+        blks = client.execute("lsblk -pPo NAME,TYPE,MOUNTPOINT")
         root_device = client.execute(
-            'realpath /dev/disk/cloud/azure_root-part1'
+            "realpath /dev/disk/cloud/azure_root-part1"
+        )
+        assert (
+            'NAME="{}" TYPE="part" MOUNTPOINT="/"'.format(root_device) in blks
         )
-        assert 'NAME="{}" TYPE="part" MOUNTPOINT="/"'.format(
-            root_device) in blks
         if is_ephemeral:
             ephemeral_device = client.execute(
-                'realpath /dev/disk/cloud/azure_resource-part1'
+                "realpath /dev/disk/cloud/azure_resource-part1"
+            )
+            assert (
+                'NAME="{}" TYPE="part" MOUNTPOINT="/mnt"'.format(
+                    ephemeral_device
+                )
+                in blks
             )
-            assert 'NAME="{}" TYPE="part" MOUNTPOINT="/mnt"'.format(
-                ephemeral_device) in blks
diff --git a/tests/integration_tests/bugs/test_lp1910835.py b/tests/integration_tests/bugs/test_lp1910835.py
index 87f92d5e..ddd996f9 100644
--- a/tests/integration_tests/bugs/test_lp1910835.py
+++ b/tests/integration_tests/bugs/test_lp1910835.py
@@ -19,7 +19,6 @@ will match.
 """
 import pytest
 
-
 USER_DATA_TMPL = """\
 #cloud-config
 ssh_authorized_keys:
diff --git a/tests/integration_tests/bugs/test_lp1912844.py b/tests/integration_tests/bugs/test_lp1912844.py
index efafae50..55511ed2 100644
--- a/tests/integration_tests/bugs/test_lp1912844.py
+++ b/tests/integration_tests/bugs/test_lp1912844.py
@@ -51,7 +51,9 @@ vlans:
     id: 200
     link: ovs-br
     mtu: 1500
-""".format(MAC_ADDRESS)
+""".format(
+    MAC_ADDRESS
+)
 
 
 SETUP_USER_DATA = """\
diff --git a/tests/integration_tests/clouds.py b/tests/integration_tests/clouds.py
index dee2adff..d4670bac 100644
--- a/tests/integration_tests/clouds.py
+++ b/tests/integration_tests/clouds.py
@@ -1,17 +1,17 @@
 # This file is part of cloud-init. See LICENSE file for license information.
-from abc import ABC, abstractmethod
 import datetime
 import logging
 import os.path
 import random
 import string
+from abc import ABC, abstractmethod
 from uuid import UUID
 
 from pycloudlib import (
     EC2,
     GCE,
-    Azure,
     OCI,
+    Azure,
     LXDContainer,
     LXDVirtualMachine,
     Openstack,
@@ -19,14 +19,15 @@ from pycloudlib import (
 from pycloudlib.lxd.instance import LXDInstance
 
 import cloudinit
-from cloudinit.subp import subp, ProcessExecutionError
+from cloudinit.subp import ProcessExecutionError, subp
 from tests.integration_tests import integration_settings
 from tests.integration_tests.instances import (
+    IntegrationAzureInstance,
     IntegrationEc2Instance,
     IntegrationGceInstance,
-    IntegrationAzureInstance, IntegrationInstance,
-    IntegrationOciInstance,
+    IntegrationInstance,
     IntegrationLxdInstance,
+    IntegrationOciInstance,
 )
 from tests.integration_tests.util import emit_dots_on_travis
 
@@ -36,7 +37,7 @@ except ImportError:
     pass
 
 
-log = logging.getLogger('integration_testing')
+log = logging.getLogger("integration_testing")
 
 
 def _get_ubuntu_series() -> list:
@@ -149,41 +150,48 @@ class IntegrationCloud(ABC):
         pycloudlib_instance = self.cloud_instance.launch(**launch_kwargs)
         return pycloudlib_instance
 
-    def launch(self, user_data=None, launch_kwargs=None,
-               settings=integration_settings, **kwargs):
+    def launch(
+        self,
+        user_data=None,
+        launch_kwargs=None,
+        settings=integration_settings,
+        **kwargs
+    ):
         if launch_kwargs is None:
             launch_kwargs = {}
         if self.settings.EXISTING_INSTANCE_ID:
             log.info(
-                'Not launching instance due to EXISTING_INSTANCE_ID. '
-                'Instance id: %s', self.settings.EXISTING_INSTANCE_ID)
+                "Not launching instance due to EXISTING_INSTANCE_ID. "
+                "Instance id: %s",
+                self.settings.EXISTING_INSTANCE_ID,
+            )
             self.instance = self.cloud_instance.get_instance(
                 self.settings.EXISTING_INSTANCE_ID
             )
             return self.instance
         default_launch_kwargs = {
-            'image_id': self.image_id,
-            'user_data': user_data,
+            "image_id": self.image_id,
+            "user_data": user_data,
         }
         launch_kwargs = {**default_launch_kwargs, **launch_kwargs}
         log.info(
             "Launching instance with launch_kwargs:\n%s",
-            "\n".join("{}={}".format(*item) for item in launch_kwargs.items())
+            "\n".join("{}={}".format(*item) for item in launch_kwargs.items()),
         )
 
         with emit_dots_on_travis():
             pycloudlib_instance = self._perform_launch(launch_kwargs, **kwargs)
-        log.info('Launched instance: %s', pycloudlib_instance)
+        log.info("Launched instance: %s", pycloudlib_instance)
         instance = self.get_instance(pycloudlib_instance, settings)
-        if launch_kwargs.get('wait', True):
+        if launch_kwargs.get("wait", True):
             # If we aren't waiting, we can't rely on command execution here
             log.info(
-                'cloud-init version: %s',
-                instance.execute("cloud-init --version")
+                "cloud-init version: %s",
+                instance.execute("cloud-init --version"),
             )
             serial = instance.execute("grep serial /etc/cloud/build.info")
             if serial:
-                log.info('image serial: %s', serial.split()[1])
+                log.info("image serial: %s", serial.split()[1])
         return instance
 
     def get_instance(self, cloud_instance, settings=integration_settings):
@@ -199,66 +207,70 @@ class IntegrationCloud(ABC):
         if self.snapshot_id:
             if self.settings.KEEP_IMAGE:
                 log.info(
-                    'NOT deleting snapshot image created for this testrun '
-                    'because KEEP_IMAGE is True: %s', self.snapshot_id)
+                    "NOT deleting snapshot image created for this testrun "
+                    "because KEEP_IMAGE is True: %s",
+                    self.snapshot_id,
+                )
             else:
                 log.info(
-                    'Deleting snapshot image created for this testrun: %s',
-                    self.snapshot_id
+                    "Deleting snapshot image created for this testrun: %s",
+                    self.snapshot_id,
                 )
                 self.cloud_instance.delete_image(self.snapshot_id)
 
 
 class Ec2Cloud(IntegrationCloud):
-    datasource = 'ec2'
+    datasource = "ec2"
     integration_instance_cls = IntegrationEc2Instance
 
     def _get_cloud_instance(self):
-        return EC2(tag='ec2-integration-test')
+        return EC2(tag="ec2-integration-test")
 
 
 class GceCloud(IntegrationCloud):
-    datasource = 'gce'
+    datasource = "gce"
     integration_instance_cls = IntegrationGceInstance
 
     def _get_cloud_instance(self):
         return GCE(
-            tag='gce-integration-test',
+            tag="gce-integration-test",
         )
 
 
 class AzureCloud(IntegrationCloud):
-    datasource = 'azure'
+    datasource = "azure"
     integration_instance_cls = IntegrationAzureInstance
 
     def _get_cloud_instance(self):
-        return Azure(tag='azure-integration-test')
+        return Azure(tag="azure-integration-test")
 
     def destroy(self):
         if self.settings.KEEP_INSTANCE:
             log.info(
-                'NOT deleting resource group because KEEP_INSTANCE is true '
-                'and deleting resource group would also delete instance. '
-                'Instance and resource group must both be manually deleted.'
+                "NOT deleting resource group because KEEP_INSTANCE is true "
+                "and deleting resource group would also delete instance. "
+                "Instance and resource group must both be manually deleted."
             )
         else:
             self.cloud_instance.delete_resource_group()
 
 
 class OciCloud(IntegrationCloud):
-    datasource = 'oci'
+    datasource = "oci"
     integration_instance_cls = IntegrationOciInstance
 
     def _get_cloud_instance(self):
         if not integration_settings.ORACLE_AVAILABILITY_DOMAIN:
             raise Exception(
-                'ORACLE_AVAILABILITY_DOMAIN must be set to a valid '
-                'availability domain. If using the oracle CLI, '
-                'try `oci iam availability-domain list`'
+                "ORACLE_AVAILABILITY_DOMAIN must be set to a valid "
+                "availability domain. If using the oracle CLI, "
+                "try `oci iam availability-domain list`"
             )
         return OCI(
-            tag='oci-integration-test',
-            availability_domain=integration_settings.ORACLE_AVAILABILITY_DOMAIN
+            tag="oci-integration-test",
+            availability_domain=(
+                integration_settings.ORACLE_AVAILABILITY_DOMAIN,
+            ),
         )
 
 
@@ -277,38 +289,42 @@ class _LxdIntegrationCloud(IntegrationCloud):
     def _mount_source(instance: LXDInstance):
         cloudinit_path = cloudinit.__path__[0]
         mounts = [
-            (cloudinit_path, '/usr/lib/python3/dist-packages/cloudinit'),
-            (os.path.join(cloudinit_path, '..', 'config', 'cloud.cfg.d'),
-             '/etc/cloud/cloud.cfg.d'),
-            (os.path.join(cloudinit_path, '..', 'templates'),
-             '/etc/cloud/templates'),
+            (cloudinit_path, "/usr/lib/python3/dist-packages/cloudinit"),
+            (
+                os.path.join(cloudinit_path, "..", "config", "cloud.cfg.d"),
+                "/etc/cloud/cloud.cfg.d",
+            ),
+            (
+                os.path.join(cloudinit_path, "..", "templates"),
+                "/etc/cloud/templates",
+            ),
         ]
         for (n, (source_path, target_path)) in enumerate(mounts):
             format_variables = {
-                'name': instance.name,
-                'source_path': os.path.realpath(source_path),
-                'container_path': target_path,
-                'idx': n,
+                "name": instance.name,
+                "source_path": os.path.realpath(source_path),
+                "container_path": target_path,
+                "idx": n,
             }
             log.info(
-                'Mounting source %(source_path)s directly onto LXD'
-                ' container/VM named %(name)s at %(container_path)s',
-                format_variables
+                "Mounting source %(source_path)s directly onto LXD"
+                " container/VM named %(name)s at %(container_path)s",
+                format_variables,
             )
             command = (
-                'lxc config device add {name} host-cloud-init-{idx} disk '
-                'source={source_path} '
-                'path={container_path}'
+                "lxc config device add {name} host-cloud-init-{idx} disk "
+                "source={source_path} "
+                "path={container_path}"
             ).format(**format_variables)
             subp(command.split())
 
     def _perform_launch(self, launch_kwargs, **kwargs):
-        launch_kwargs['inst_type'] = launch_kwargs.pop('instance_type', None)
-        wait = launch_kwargs.pop('wait', True)
-        release = launch_kwargs.pop('image_id')
+        launch_kwargs["inst_type"] = launch_kwargs.pop("instance_type", None)
+        wait = launch_kwargs.pop("wait", True)
+        release = launch_kwargs.pop("image_id")
 
         try:
-            profile_list = launch_kwargs['profile_list']
+            profile_list = launch_kwargs["profile_list"]
         except KeyError:
             profile_list = self._get_or_set_profile_list(release)
 
@@ -317,52 +333,53 @@ class _LxdIntegrationCloud(IntegrationCloud):
             random.choices(string.ascii_lowercase + string.digits, k=8)
         )
         pycloudlib_instance = self.cloud_instance.init(
-            launch_kwargs.pop('name', default_name),
+            launch_kwargs.pop("name", default_name),
             release,
             profile_list=profile_list,
             **launch_kwargs
         )
-        if self.settings.CLOUD_INIT_SOURCE == 'IN_PLACE':
+        if self.settings.CLOUD_INIT_SOURCE == "IN_PLACE":
             self._mount_source(pycloudlib_instance)
-        if 'lxd_setup' in kwargs:
+        if "lxd_setup" in kwargs:
             log.info("Running callback specified by 'lxd_setup' mark")
-            kwargs['lxd_setup'](pycloudlib_instance)
+            kwargs["lxd_setup"](pycloudlib_instance)
         pycloudlib_instance.start(wait=wait)
         return pycloudlib_instance
 
 
 class LxdContainerCloud(_LxdIntegrationCloud):
-    datasource = 'lxd_container'
+    datasource = "lxd_container"
     pycloudlib_instance_cls = LXDContainer
-    instance_tag = 'lxd-container-integration-test'
+    instance_tag = "lxd-container-integration-test"
 
 
 class LxdVmCloud(_LxdIntegrationCloud):
-    datasource = 'lxd_vm'
+    datasource = "lxd_vm"
     pycloudlib_instance_cls = LXDVirtualMachine
-    instance_tag = 'lxd-vm-integration-test'
+    instance_tag = "lxd-vm-integration-test"
     _profile_list = None
 
     def _get_or_set_profile_list(self, release):
         if self._profile_list:
             return self._profile_list
         self._profile_list = self.cloud_instance.build_necessary_profiles(
-            release)
+            release
+        )
         return self._profile_list
 
 
 class OpenstackCloud(IntegrationCloud):
-    datasource = 'openstack'
+    datasource = "openstack"
     integration_instance_cls = IntegrationInstance
 
     def _get_cloud_instance(self):
         if not integration_settings.OPENSTACK_NETWORK:
             raise Exception(
-                'OPENSTACK_NETWORK must be set to a valid Openstack network. '
-                'If using the openstack CLI, try `openstack network list`'
+                "OPENSTACK_NETWORK must be set to a valid Openstack network. "
+                "If using the openstack CLI, try `openstack network list`"
             )
         return Openstack(
-            tag='openstack-integration-test',
+            tag="openstack-integration-test",
             network=integration_settings.OPENSTACK_NETWORK,
         )
 
@@ -372,9 +389,9 @@ class OpenstackCloud(IntegrationCloud):
             UUID(image.image_id)
         except ValueError as e:
             raise Exception(
-                'When using Openstack, `OS_IMAGE` MUST be specified with '
-                'a 36-character UUID image ID. Passing in a release name is '
-                'not valid here.\n'
-                'OS image id: {}'.format(image.image_id)
+                "When using Openstack, `OS_IMAGE` MUST be specified with "
+                "a 36-character UUID image ID. Passing in a release name is "
+                "not valid here.\n"
+                "OS image id: {}".format(image.image_id)
             ) from e
         return image.image_id
diff --git a/tests/integration_tests/conftest.py b/tests/integration_tests/conftest.py
index 5eab5a45..b14b6ad0 100644
--- a/tests/integration_tests/conftest.py
+++ b/tests/integration_tests/conftest.py
@@ -2,12 +2,13 @@
 import datetime
 import functools
 import logging
-import pytest
 import os
 import sys
-from tarfile import TarFile
 from contextlib import contextmanager
 from pathlib import Path
+from tarfile import TarFile
+
+import pytest
 
 from tests.integration_tests import integration_settings
 from tests.integration_tests.clouds import (
@@ -19,31 +20,30 @@ from tests.integration_tests.clouds import (
     LxdContainerCloud,
     LxdVmCloud,
     OciCloud,
-    _LxdIntegrationCloud,
     OpenstackCloud,
+    _LxdIntegrationCloud,
 )
 from tests.integration_tests.instances import (
     CloudInitSource,
     IntegrationInstance,
 )
 
-
-log = logging.getLogger('integration_testing')
+log = logging.getLogger("integration_testing")
 log.addHandler(logging.StreamHandler(sys.stdout))
 log.setLevel(logging.INFO)
 
 platforms = {
-    'ec2': Ec2Cloud,
-    'gce': GceCloud,
-    'azure': AzureCloud,
-    'oci': OciCloud,
-    'lxd_container': LxdContainerCloud,
-    'lxd_vm': LxdVmCloud,
-    'openstack': OpenstackCloud,
+    "ec2": Ec2Cloud,
+    "gce": GceCloud,
+    "azure": AzureCloud,
+    "oci": OciCloud,
+    "lxd_container": LxdContainerCloud,
+    "lxd_vm": LxdVmCloud,
+    "openstack": OpenstackCloud,
 }
 os_list = ["ubuntu"]
 
-session_start_time = datetime.datetime.now().strftime('%y%m%d%H%M%S')
+session_start_time = datetime.datetime.now().strftime("%y%m%d%H%M%S")
 
 XENIAL_LXD_VM_EXEC_MSG = """\
 The default xenial images do not support `exec` for LXD VMs.
@@ -69,14 +69,14 @@ def pytest_runtest_setup(item):
     test_marks = [mark.name for mark in item.iter_markers()]
     supported_platforms = set(all_platforms).intersection(test_marks)
     current_platform = integration_settings.PLATFORM
-    unsupported_message = 'Cannot run on platform {}'.format(current_platform)
-    if 'no_container' in test_marks:
-        if 'lxd_container' in test_marks:
+    unsupported_message = "Cannot run on platform {}".format(current_platform)
+    if "no_container" in test_marks:
+        if "lxd_container" in test_marks:
             raise Exception(
-                'lxd_container and no_container marks simultaneously set '
-                'on test'
+                "lxd_container and no_container marks simultaneously set "
+                "on test"
             )
-        if current_platform == 'lxd_container':
+        if current_platform == "lxd_container":
             pytest.skip(unsupported_message)
     if supported_platforms and current_platform not in supported_platforms:
         pytest.skip(unsupported_message)
@@ -86,8 +86,8 @@ def pytest_runtest_setup(item):
     supported_os_set = set(os_list).intersection(test_marks)
     if current_os and supported_os_set and current_os not in supported_os_set:
         pytest.skip("Cannot run on OS {}".format(current_os))
-    if 'unstable' in test_marks and not integration_settings.RUN_UNSTABLE:
-        pytest.skip('Test marked unstable. Manually remove mark to run it')
+    if "unstable" in test_marks and not integration_settings.RUN_UNSTABLE:
+        pytest.skip("Test marked unstable. Manually remove mark to run it")
 
     current_release = image.release
     if "not_{}".format(current_release) in test_marks:
@@ -101,7 +101,7 @@ def disable_subp_usage(request):
     pass
 
 
-@pytest.yield_fixture(scope='session')
+@pytest.yield_fixture(scope="session")
 def session_cloud():
     if integration_settings.PLATFORM not in platforms.keys():
         raise ValueError(
@@ -122,28 +122,30 @@ def session_cloud():
 
 def get_validated_source(
     session_cloud: IntegrationCloud,
-    source=integration_settings.CLOUD_INIT_SOURCE
+    source=integration_settings.CLOUD_INIT_SOURCE,
 ) -> CloudInitSource:
-    if source == 'NONE':
+    if source == "NONE":
         return CloudInitSource.NONE
-    elif source == 'IN_PLACE':
-        if session_cloud.datasource not in ['lxd_container', 'lxd_vm']:
+    elif source == "IN_PLACE":
+        if session_cloud.datasource not in ["lxd_container", "lxd_vm"]:
             raise ValueError(
-                'IN_PLACE as CLOUD_INIT_SOURCE only works for LXD')
+                "IN_PLACE as CLOUD_INIT_SOURCE only works for LXD"
+            )
         return CloudInitSource.IN_PLACE
-    elif source == 'PROPOSED':
+    elif source == "PROPOSED":
         return CloudInitSource.PROPOSED
-    elif source.startswith('ppa:'):
+    elif source.startswith("ppa:"):
         return CloudInitSource.PPA
     elif os.path.isfile(str(source)):
         return CloudInitSource.DEB_PACKAGE
     elif source == "UPGRADE":
         return CloudInitSource.UPGRADE
     raise ValueError(
-        'Invalid value for CLOUD_INIT_SOURCE setting: {}'.format(source))
+        "Invalid value for CLOUD_INIT_SOURCE setting: {}".format(source)
+    )
 
 
-@pytest.fixture(scope='session')
+@pytest.fixture(scope="session")
 def setup_image(session_cloud: IntegrationCloud):
     """Setup the target environment with the correct version of cloud-init.
 
@@ -153,17 +155,18 @@ def setup_image(session_cloud: IntegrationCloud):
     source = get_validated_source(session_cloud)
     if not source.installs_new_version():
         return
-    log.info('Setting up environment for %s', session_cloud.datasource)
+    log.info("Setting up environment for %s", session_cloud.datasource)
     client = session_cloud.launch()
     client.install_new_cloud_init(source)
     # Even if we're keeping instances, we don't want to keep this
     # one around as it was just for image creation
     client.destroy()
-    log.info('Done with environment setup')
+    log.info("Done with environment setup")
 
 
-def _collect_logs(instance: IntegrationInstance, node_id: str,
-                  test_failed: bool):
+def _collect_logs(
+    instance: IntegrationInstance, node_id: str, test_failed: bool
+):
     """Collect logs from remote instance.
 
     Args:
@@ -172,36 +175,43 @@ def _collect_logs(instance: IntegrationInstance, node_id: str,
             tests/integration_tests/test_example.py::TestExample.test_example
         test_failed: If test failed or not
     """
-    if any([
-        integration_settings.COLLECT_LOGS == 'NEVER',
-        integration_settings.COLLECT_LOGS == 'ON_ERROR' and not test_failed
-    ]):
+    if any(
+        [
+            integration_settings.COLLECT_LOGS == "NEVER",
+            integration_settings.COLLECT_LOGS == "ON_ERROR"
+            and not test_failed,
+        ]
+    ):
         return
     instance.execute(
-        'cloud-init collect-logs -u -t /var/tmp/cloud-init.tar.gz')
+        "cloud-init collect-logs -u -t /var/tmp/cloud-init.tar.gz"
+    )
     node_id_path = Path(
-        node_id
-        .replace('.py', '')  # Having a directory with '.py' would be weird
-        .replace('::', os.path.sep)  # Turn classes/tests into paths
-        .replace('[', '-')  # For parametrized names
-        .replace(']', '')  # For parameterized names
+        node_id.replace(
+            ".py", ""
+        )  # Having a directory with '.py' would be weird
+        .replace("::", os.path.sep)  # Turn classes/tests into paths
+        .replace("[", "-")  # For parametrized names
+        .replace("]", "")  # For parameterized names
+    )
+    log_dir = (
+        Path(integration_settings.LOCAL_LOG_PATH)
+        / session_start_time
+        / node_id_path
     )
-    log_dir = Path(
-        integration_settings.LOCAL_LOG_PATH
-    ) / session_start_time / node_id_path
     log.info("Writing logs to %s", log_dir)
 
     if not log_dir.exists():
         log_dir.mkdir(parents=True)
 
     # Add a symlink to the latest log output directory
-    last_symlink = Path(integration_settings.LOCAL_LOG_PATH) / 'last'
+    last_symlink = Path(integration_settings.LOCAL_LOG_PATH) / "last"
     if os.path.islink(last_symlink):
         os.unlink(last_symlink)
     os.symlink(log_dir.parent, last_symlink)
 
-    tarball_path = log_dir / 'cloud-init.tar.gz'
-    instance.pull_file('/var/tmp/cloud-init.tar.gz', tarball_path)
+    tarball_path = log_dir / "cloud-init.tar.gz"
+    instance.pull_file("/var/tmp/cloud-init.tar.gz", tarball_path)
 
     tarball = TarFile.open(str(tarball_path))
     tarball.extractall(path=str(log_dir))
@@ -218,12 +228,12 @@ def _client(request, fixture_utils, session_cloud: IntegrationCloud):
     getter = functools.partial(
         fixture_utils.closest_marker_first_arg_or, request, default=None
     )
-    user_data = getter('user_data')
-    name = getter('instance_name')
-    lxd_config_dict = getter('lxd_config_dict')
-    lxd_setup = getter('lxd_setup')
+    user_data = getter("user_data")
+    name = getter("instance_name")
+    lxd_config_dict = getter("lxd_config_dict")
+    lxd_setup = getter("lxd_setup")
     lxd_use_exec = fixture_utils.closest_marker_args_or(
-        request, 'lxd_use_exec', None
+        request, "lxd_use_exec", None
     )
 
     launch_kwargs = {}
@@ -250,8 +260,8 @@ def _client(request, fixture_utils, session_cloud: IntegrationCloud):
     local_launch_kwargs = {}
     if lxd_setup is not None:
         if not isinstance(session_cloud, _LxdIntegrationCloud):
-            pytest.skip('lxd_setup requires LXD')
-        local_launch_kwargs['lxd_setup'] = lxd_setup
+            pytest.skip("lxd_setup requires LXD")
+        local_launch_kwargs["lxd_setup"] = lxd_setup
 
     with session_cloud.launch(
         user_data=user_data, launch_kwargs=launch_kwargs, **local_launch_kwargs
@@ -273,14 +283,14 @@ def client(request, fixture_utils, session_cloud, setup_image):
         yield client
 
 
-@pytest.yield_fixture(scope='module')
+@pytest.yield_fixture(scope="module")
 def module_client(request, fixture_utils, session_cloud, setup_image):
     """Provide a client that runs once per module."""
     with _client(request, fixture_utils, session_cloud) as client:
         yield client
 
 
-@pytest.yield_fixture(scope='class')
+@pytest.yield_fixture(scope="class")
 def class_client(request, fixture_utils, session_cloud, setup_image):
     """Provide a client that runs once per class."""
     with _client(request, fixture_utils, session_cloud) as client:
diff --git a/tests/integration_tests/datasources/test_lxd_discovery.py b/tests/integration_tests/datasources/test_lxd_discovery.py
index 3f05e906..da010813 100644
--- a/tests/integration_tests/datasources/test_lxd_discovery.py
+++ b/tests/integration_tests/datasources/test_lxd_discovery.py
@@ -1,4 +1,5 @@
 import json
+
 import pytest
 import yaml
 
@@ -9,10 +10,10 @@ from tests.integration_tests.util import verify_clean_log
 
 def _customize_envionment(client: IntegrationInstance):
     client.write_to_file(
-        '/etc/cloud/cloud.cfg.d/99-detect-lxd.cfg',
-        'datasource_list: [LXD]\n',
+        "/etc/cloud/cloud.cfg.d/99-detect-lxd.cfg",
+        "datasource_list: [LXD]\n",
     )
-    client.execute('cloud-init clean --logs')
+    client.execute("cloud-init clean --logs")
     client.restart()
 
 
@@ -25,40 +26,44 @@ def test_lxd_datasource_discovery(client: IntegrationInstance):
     """Test that DataSourceLXD is detected instead of NoCloud."""
     _customize_envionment(client)
     nic_dev = "enp5s0" if client.settings.PLATFORM == "lxd_vm" else "eth0"
-    result = client.execute('cloud-init status --long')
+    result = client.execute("cloud-init status --long")
     if not result.ok:
-        raise AssertionError('cloud-init failed:\n%s', result.stderr)
+        raise AssertionError("cloud-init failed:\n%s", result.stderr)
     if "DataSourceLXD" not in result.stdout:
         raise AssertionError(
-            'cloud-init did not discover DataSourceLXD', result.stdout
+            "cloud-init did not discover DataSourceLXD", result.stdout
         )
-    netplan_yaml = client.execute('cat /etc/netplan/50-cloud-init.yaml')
+    netplan_yaml = client.execute("cat /etc/netplan/50-cloud-init.yaml")
     netplan_cfg = yaml.safe_load(netplan_yaml)
     assert {
-        'network': {'ethernets': {nic_dev: {'dhcp4': True}}, 'version': 2}
+        "network": {"ethernets": {nic_dev: {"dhcp4": True}}, "version": 2}
     } == netplan_cfg
-    log = client.read_from_file('/var/log/cloud-init.log')
+    log = client.read_from_file("/var/log/cloud-init.log")
     verify_clean_log(log)
-    result = client.execute('cloud-id')
+    result = client.execute("cloud-id")
     if result.stdout != "lxd":
         raise AssertionError(
             "cloud-id didn't report lxd. Result: %s", result.stdout
         )
     # Validate config instance data represented
-    data = json.loads(client.read_from_file(
-        '/run/cloud-init/instance-data.json')
+    data = json.loads(
+        client.read_from_file("/run/cloud-init/instance-data.json")
     )
     v1 = data["v1"]
     ds_cfg = data["ds"]
     assert "lxd" == v1["platform"]
     assert "LXD socket API v. 1.0 (/dev/lxd/sock)" == v1["subplatform"]
-    ds_cfg = json.loads(client.execute('cloud-init query ds').stdout)
+    ds_cfg = json.loads(client.execute("cloud-init query ds").stdout)
     assert ["_doc", "_metadata_api_version", "config", "meta-data"] == sorted(
         list(ds_cfg.keys())
     )
     if (
-        client.settings.PLATFORM == "lxd_vm" and
-        ImageSpecification.from_os_image().release in ("xenial", "bionic")
+        client.settings.PLATFORM == "lxd_vm"
+        and ImageSpecification.from_os_image().release
+        in (
+            "xenial",
+            "bionic",
+        )
     ):
         # pycloudlib injects user.vendor_data for lxd_vm on bionic and xenial
         # to start the lxd-agent.
@@ -74,17 +79,13 @@ def test_lxd_datasource_discovery(client: IntegrationInstance):
     assert {"public-keys": v1["public_ssh_keys"][0]} == (
         yaml.safe_load(ds_cfg["config"]["user.meta-data"])
     )
-    assert (
-        "#cloud-config\ninstance-id" in ds_cfg["meta-data"]
-    )
+    assert "#cloud-config\ninstance-id" in ds_cfg["meta-data"]
     # Assert NoCloud seed data is still present in cloud image metadata
     # This will start failing if we redact metadata templates from
     # https://cloud-images.ubuntu.com/daily/server/jammy/current/\
     #    jammy-server-cloudimg-amd64-lxd.tar.xz
     nocloud_metadata = yaml.safe_load(
-        client.read_from_file(
-            "/var/lib/cloud/seed/nocloud-net/meta-data"
-        )
+        client.read_from_file("/var/lib/cloud/seed/nocloud-net/meta-data")
     )
     assert client.instance.name == nocloud_metadata["instance-id"]
     assert (
diff --git a/tests/integration_tests/datasources/test_network_dependency.py b/tests/integration_tests/datasources/test_network_dependency.py
index 24e71f9d..32ac7053 100644
--- a/tests/integration_tests/datasources/test_network_dependency.py
+++ b/tests/integration_tests/datasources/test_network_dependency.py
@@ -6,10 +6,10 @@ from tests.integration_tests.instances import IntegrationInstance
 def _customize_envionment(client: IntegrationInstance):
     # Insert our "disable_network_activation" file here
     client.write_to_file(
-        '/etc/cloud/cloud.cfg.d/99-disable-network-activation.cfg',
-        'disable_network_activation: true\n',
+        "/etc/cloud/cloud.cfg.d/99-disable-network-activation.cfg",
+        "disable_network_activation: true\n",
     )
-    client.execute('cloud-init clean --logs')
+    client.execute("cloud-init clean --logs")
     client.restart()
 
 
@@ -20,13 +20,14 @@ def _customize_envionment(client: IntegrationInstance):
 def test_network_activation_disabled(client: IntegrationInstance):
     """Test that the network is not activated during init mode."""
     _customize_envionment(client)
-    result = client.execute('systemctl status google-guest-agent.service')
+    result = client.execute("systemctl status google-guest-agent.service")
     if not result.ok:
         raise AssertionError(
-            'google-guest-agent is not active:\n%s', result.stdout)
-    log = client.read_from_file('/var/log/cloud-init.log')
+            "google-guest-agent is not active:\n%s", result.stdout
+        )
+    log = client.read_from_file("/var/log/cloud-init.log")
 
     assert "Running command ['netplan', 'apply']" not in log
 
-    assert 'Not bringing up newly configured network interfaces' in log
-    assert 'Bringing up newly configured network interfaces' not in log
+    assert "Not bringing up newly configured network interfaces" in log
+    assert "Bringing up newly configured network interfaces" not in log
diff --git a/tests/integration_tests/instances.py b/tests/integration_tests/instances.py
index 8f66bf43..793f729e 100644
--- a/tests/integration_tests/instances.py
+++ b/tests/integration_tests/instances.py
@@ -1,8 +1,8 @@
 # This file is part of cloud-init. See LICENSE file for license information.
-from enum import Enum
 import logging
 import os
 import uuid
+from enum import Enum
 from tempfile import NamedTemporaryFile
 
 from pycloudlib.instance import BaseInstance
@@ -13,20 +13,21 @@ from tests.integration_tests.util import retry
 
 try:
     from typing import TYPE_CHECKING
+
     if TYPE_CHECKING:
         from tests.integration_tests.clouds import (  # noqa: F401
-            IntegrationCloud
+            IntegrationCloud,
         )
 except ImportError:
     pass
 
 
-log = logging.getLogger('integration_testing')
+log = logging.getLogger("integration_testing")
 
 
 def _get_tmp_path():
     tmp_filename = str(uuid.uuid4())
-    return '/var/tmp/{}.tmp'.format(tmp_filename)
+    return "/var/tmp/{}.tmp".format(tmp_filename)
 
 
 class CloudInitSource(Enum):
@@ -37,6 +38,7 @@ class CloudInitSource(Enum):
     explanation of these values. If the value set there can't be parsed into
     one of these values, an exception will be raised
     """
+
     NONE = 1
     IN_PLACE = 2
     PROPOSED = 3
@@ -51,8 +53,12 @@ class CloudInitSource(Enum):
 
 
 class IntegrationInstance:
-    def __init__(self, cloud: 'IntegrationCloud', instance: BaseInstance,
-                 settings=integration_settings):
+    def __init__(
+        self,
+        cloud: "IntegrationCloud",
+        instance: BaseInstance,
+        settings=integration_settings,
+    ):
         self.cloud = cloud
         self.instance = instance
         self.settings = settings
@@ -69,41 +75,44 @@ class IntegrationInstance:
         self.instance.restart()
 
     def execute(self, command, *, use_sudo=True) -> Result:
-        if self.instance.username == 'root' and use_sudo is False:
-            raise Exception('Root user cannot run unprivileged')
+        if self.instance.username == "root" and use_sudo is False:
+            raise Exception("Root user cannot run unprivileged")
         return self.instance.execute(command, use_sudo=use_sudo)
 
     def pull_file(self, remote_path, local_path):
         # First copy to a temporary directory because of permissions issues
         tmp_path = _get_tmp_path()
-        self.instance.execute('cp {} {}'.format(str(remote_path), tmp_path))
+        self.instance.execute("cp {} {}".format(str(remote_path), tmp_path))
         self.instance.pull_file(tmp_path, str(local_path))
 
     def push_file(self, local_path, remote_path):
         # First push to a temporary directory because of permissions issues
         tmp_path = _get_tmp_path()
         self.instance.push_file(str(local_path), tmp_path)
-        self.execute('mv {} {}'.format(tmp_path, str(remote_path)))
+        self.execute("mv {} {}".format(tmp_path, str(remote_path)))
 
     def read_from_file(self, remote_path) -> str:
-        result = self.execute('cat {}'.format(remote_path))
+        result = self.execute("cat {}".format(remote_path))
         if result.failed:
             # TODO: Raise here whatever pycloudlib raises when it has
             # a consistent error response
             raise IOError(
-                'Failed reading remote file via cat: {}\n'
-                'Return code: {}\n'
-                'Stderr: {}\n'
-                'Stdout: {}'.format(
-                    remote_path, result.return_code,
-                    result.stderr, result.stdout)
+                "Failed reading remote file via cat: {}\n"
+                "Return code: {}\n"
+                "Stderr: {}\n"
+                "Stdout: {}".format(
+                    remote_path,
+                    result.return_code,
+                    result.stderr,
+                    result.stdout,
+                )
             )
         return result.stdout
 
     def write_to_file(self, remote_path, contents: str):
         # Writes file locally and then pushes it rather
         # than writing the file directly on the instance
-        with NamedTemporaryFile('w', delete=False) as tmp_file:
+        with NamedTemporaryFile("w", delete=False) as tmp_file:
             tmp_file.write(contents)
 
         try:
@@ -113,7 +122,7 @@ class IntegrationInstance:
 
     def snapshot(self):
         image_id = self.cloud.snapshot(self.instance)
-        log.info('Created new image: %s', image_id)
+        log.info("Created new image: %s", image_id)
         return image_id
 
     def install_new_cloud_init(
@@ -133,10 +142,11 @@ class IntegrationInstance:
         else:
             raise Exception(
                 "Specified to install {} which isn't supported here".format(
-                    source)
+                    source
+                )
             )
-        version = self.execute('cloud-init -v').split()[-1]
-        log.info('Installed cloud-init version: %s', version)
+        version = self.execute("cloud-init -v").split()[-1]
+        log.info("Installed cloud-init version: %s", version)
         if clean:
             self.instance.clean()
         if take_snapshot:
@@ -149,38 +159,39 @@ class IntegrationInstance:
 
     @retry(tries=30, delay=1)
     def install_proposed_image(self):
-        log.info('Installing proposed image')
+        log.info("Installing proposed image")
         assert self.execute(
             'echo deb "http://archive.ubuntu.com/ubuntu '
             '$(lsb_release -sc)-proposed main" >> '
-            '/etc/apt/sources.list.d/proposed.list'
+            "/etc/apt/sources.list.d/proposed.list"
         ).ok
-        assert self.execute('apt-get update -q').ok
-        assert self.execute('apt-get install -qy cloud-init').ok
+        assert self.execute("apt-get update -q").ok
+        assert self.execute("apt-get install -qy cloud-init").ok
 
     @retry(tries=30, delay=1)
     def install_ppa(self):
-        log.info('Installing PPA')
-        assert self.execute('add-apt-repository {} -y'.format(
-            self.settings.CLOUD_INIT_SOURCE)
+        log.info("Installing PPA")
+        assert self.execute(
+            "add-apt-repository {} -y".format(self.settings.CLOUD_INIT_SOURCE)
         ).ok
-        assert self.execute('apt-get update -q').ok
-        assert self.execute('apt-get install -qy cloud-init').ok
+        assert self.execute("apt-get update -q").ok
+        assert self.execute("apt-get install -qy cloud-init").ok
 
     @retry(tries=30, delay=1)
     def install_deb(self):
-        log.info('Installing deb package')
+        log.info("Installing deb package")
         deb_path = integration_settings.CLOUD_INIT_SOURCE
         deb_name = os.path.basename(deb_path)
-        remote_path = '/var/tmp/{}'.format(deb_name)
+        remote_path = "/var/tmp/{}".format(deb_name)
         self.push_file(
             local_path=integration_settings.CLOUD_INIT_SOURCE,
-            remote_path=remote_path)
-        assert self.execute('dpkg -i {path}'.format(path=remote_path)).ok
+            remote_path=remote_path,
+        )
+        assert self.execute("dpkg -i {path}".format(path=remote_path)).ok
 
     @retry(tries=30, delay=1)
     def upgrade_cloud_init(self):
-        log.info('Upgrading cloud-init to latest version in archive')
+        log.info("Upgrading cloud-init to latest version in archive")
         assert self.execute("apt-get update -q").ok
         assert self.execute("apt-get install -qy cloud-init").ok
 
diff --git a/tests/integration_tests/integration_settings.py b/tests/integration_tests/integration_settings.py
index e4a790c2..641ce297 100644
--- a/tests/integration_tests/integration_settings.py
+++ b/tests/integration_tests/integration_settings.py
@@ -1,6 +1,5 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 import os
-
 from distutils.util import strtobool
 
 ##################################################################
@@ -22,7 +21,7 @@ RUN_UNSTABLE = False
 #  gce
 #  oci
 #  openstack
-PLATFORM = 'lxd_container'
+PLATFORM = "lxd_container"
 
 # The cloud-specific instance type to run. E.g., a1.medium on AWS
 # If the pycloudlib instance provides a default, this can be left None
@@ -34,7 +33,7 @@ INSTANCE_TYPE = None
 # <image_id>[::<os>[::<release>]].  If given, os and release should describe
 # the image specified by image_id.  (Ubuntu releases are converted to this
 # format internally; in this case, to "focal::ubuntu::focal".)
-OS_IMAGE = 'focal'
+OS_IMAGE = "focal"
 
 # Populate if you want to use a pre-launched instance instead of
 # creating a new one. The exact contents will be platform dependent
@@ -66,7 +65,7 @@ EXISTING_INSTANCE_ID = None
 #   Install from a PPA. It MUST start with 'ppa:'
 # <file path>
 #   A path to a valid package to be uploaded and installed
-CLOUD_INIT_SOURCE = 'NONE'
+CLOUD_INIT_SOURCE = "NONE"
 
 # Before an instance is torn down, we run `cloud-init collect-logs`
 # and transfer them locally. These settings specify when to collect these
@@ -75,8 +74,8 @@ CLOUD_INIT_SOURCE = 'NONE'
 #   'ALWAYS'
 #   'ON_ERROR'
 #   'NEVER'
-COLLECT_LOGS = 'ON_ERROR'
-LOCAL_LOG_PATH = '/tmp/cloud_init_test_logs'
+COLLECT_LOGS = "ON_ERROR"
+LOCAL_LOG_PATH = "/tmp/cloud_init_test_logs"
 
 ##################################################################
 # SSH KEY SETTINGS
@@ -124,7 +123,7 @@ except ImportError:
 current_settings = [var for var in locals() if var.isupper()]
 for setting in current_settings:
     env_setting = os.getenv(
-        'CLOUD_INIT_{}'.format(setting), globals()[setting]
+        "CLOUD_INIT_{}".format(setting), globals()[setting]
     )
     if isinstance(env_setting, str):
         try:
diff --git a/tests/integration_tests/modules/test_apt.py b/tests/integration_tests/modules/test_apt.py
index f5f6c813..48f398d1 100644
--- a/tests/integration_tests/modules/test_apt.py
+++ b/tests/integration_tests/modules/test_apt.py
@@ -3,12 +3,11 @@ import re
 
 import pytest
 
-from cloudinit.config import cc_apt_configure
 from cloudinit import gpg
+from cloudinit.config import cc_apt_configure
 from tests.integration_tests.clouds import ImageSpecification
 from tests.integration_tests.instances import IntegrationInstance
 
-
 USER_DATA = """\
 #cloud-config
 apt:
@@ -104,14 +103,15 @@ class TestApt:
         """Return all keys in /etc/apt/trusted.gpg.d/ and /etc/apt/trusted.gpg
         in human readable format. Mimics the output of apt-key finger
         """
-        list_cmd = ' '.join(gpg.GPG_LIST) + ' '
+        list_cmd = " ".join(gpg.GPG_LIST) + " "
         keys = class_client.execute(list_cmd + cc_apt_configure.APT_LOCAL_KEYS)
         print(keys)
         files = class_client.execute(
-            'ls ' + cc_apt_configure.APT_TRUSTED_GPG_DIR)
+            "ls " + cc_apt_configure.APT_TRUSTED_GPG_DIR
+        )
         for file in files.split():
             path = cc_apt_configure.APT_TRUSTED_GPG_DIR + file
-            keys += class_client.execute(list_cmd + path) or ''
+            keys += class_client.execute(list_cmd + path) or ""
         return keys
 
     def test_sources_list(self, class_client: IntegrationInstance):
@@ -124,8 +124,8 @@ class TestApt:
         (This is ported from
         `tests/cloud_tests/testcases/modules/apt_configure_sources_list.yaml`.)
         """
-        sources_list = class_client.read_from_file('/etc/apt/sources.list')
-        assert 6 == len(sources_list.rstrip().split('\n'))
+        sources_list = class_client.read_from_file("/etc/apt/sources.list")
+        assert 6 == len(sources_list.rstrip().split("\n"))
 
         for expected_re in EXPECTED_REGEXES:
             assert re.search(expected_re, sources_list) is not None
@@ -136,7 +136,7 @@ class TestApt:
         Ported from tests/cloud_tests/testcases/modules/apt_configure_conf.py
         """
         apt_config = class_client.read_from_file(
-            '/etc/apt/apt.conf.d/94cloud-init-config'
+            "/etc/apt/apt.conf.d/94cloud-init-config"
         )
         assert 'Assume-Yes "true";' in apt_config
         assert 'Fix-Broken "true";' in apt_config
@@ -149,40 +149,43 @@ class TestApt:
         """
         release = ImageSpecification.from_os_image().release
         ppa_path_contents = class_client.read_from_file(
-            '/etc/apt/sources.list.d/'
-            'simplestreams-dev-ubuntu-trunk-{}.list'.format(release)
+            "/etc/apt/sources.list.d/"
+            "simplestreams-dev-ubuntu-trunk-{}.list".format(release)
         )
 
         assert (
-            'http://ppa.launchpad.net/simplestreams-dev/trunk/ubuntu'
-        ) in ppa_path_contents
+            "http://ppa.launchpad.net/simplestreams-dev/trunk/ubuntu"
+            in ppa_path_contents
+        )
 
         assert TEST_PPA_KEY in self.get_keys(class_client)
 
     def test_signed_by(self, class_client: IntegrationInstance):
-        """Test the apt signed-by functionality.
-        """
+        """Test the apt signed-by functionality."""
         release = ImageSpecification.from_os_image().release
         source = (
             "deb [signed-by=/etc/apt/cloud-init.gpg.d/test_signed_by.gpg] "
             "http://ppa.launchpad.net/juju/stable/ubuntu"
-            " {} main".format(release))
+            " {} main".format(release)
+        )
         path_contents = class_client.read_from_file(
-            '/etc/apt/sources.list.d/test_signed_by.list')
+            "/etc/apt/sources.list.d/test_signed_by.list"
+        )
         assert path_contents == source
 
         key = class_client.execute(
-            'gpg --no-default-keyring --with-fingerprint --list-keys '
-            '--keyring /etc/apt/cloud-init.gpg.d/test_signed_by.gpg')
+            "gpg --no-default-keyring --with-fingerprint --list-keys "
+            "--keyring /etc/apt/cloud-init.gpg.d/test_signed_by.gpg"
+        )
 
         assert TEST_SIGNED_BY_KEY in key
 
     def test_bad_key(self, class_client: IntegrationInstance):
-        """Test the apt signed-by functionality.
-        """
+        """Test the apt signed-by functionality."""
         with pytest.raises(OSError):
             class_client.read_from_file(
-                '/etc/apt/trusted.list.d/test_bad_key.gpg')
+                "/etc/apt/trusted.list.d/test_bad_key.gpg"
+            )
 
     def test_key(self, class_client: IntegrationInstance):
         """Test the apt key functionality.
@@ -191,12 +194,13 @@ class TestApt:
         tests/cloud_tests/testcases/modules/apt_configure_sources_key.py
         """
         test_archive_contents = class_client.read_from_file(
-            '/etc/apt/sources.list.d/test_key.list'
+            "/etc/apt/sources.list.d/test_key.list"
         )
 
         assert (
-            'http://ppa.launchpad.net/cloud-init-dev/test-archive/ubuntu'
-        ) in test_archive_contents
+            "http://ppa.launchpad.net/cloud-init-dev/test-archive/ubuntu"
+            in test_archive_contents
+        )
         assert TEST_KEY in self.get_keys(class_client)
 
     def test_keyserver(self, class_client: IntegrationInstance):
@@ -206,12 +210,13 @@ class TestApt:
         tests/cloud_tests/testcases/modules/apt_configure_sources_keyserver.py
         """
         test_keyserver_contents = class_client.read_from_file(
-            '/etc/apt/sources.list.d/test_keyserver.list'
+            "/etc/apt/sources.list.d/test_keyserver.list"
         )
 
         assert (
-            'http://ppa.launchpad.net/canonical-kernel-team/ppa/ubuntu'
-        ) in test_keyserver_contents
+            "http://ppa.launchpad.net/canonical-kernel-team/ppa/ubuntu"
+            in test_keyserver_contents
+        )
 
         assert TEST_KEYSERVER_KEY in self.get_keys(class_client)
 
@@ -221,7 +226,7 @@ class TestApt:
         Ported from tests/cloud_tests/testcases/modules/apt_pipelining_os.py
         """
         conf_exists = class_client.execute(
-            'test -f /etc/apt/apt.conf.d/90cloud-init-pipelining'
+            "test -f /etc/apt/apt.conf.d/90cloud-init-pipelining"
         ).ok
         assert conf_exists is False
 
@@ -237,7 +242,7 @@ apt:
     - arches:
       - default
 """
-DEFAULT_DATA = _DEFAULT_DATA.format(uri='')
+DEFAULT_DATA = _DEFAULT_DATA.format(uri="")
 
 
 @pytest.mark.ubuntu
@@ -249,9 +254,9 @@ class TestDefaults:
 
         When no uri is provided.
         """
-        zone = class_client.execute('cloud-init query v1.availability_zone')
-        sources_list = class_client.read_from_file('/etc/apt/sources.list')
-        assert '{}.clouds.archive.ubuntu.com'.format(zone) in sources_list
+        zone = class_client.execute("cloud-init query v1.availability_zone")
+        sources_list = class_client.read_from_file("/etc/apt/sources.list")
+        assert "{}.clouds.archive.ubuntu.com".format(zone) in sources_list
 
     def test_security(self, class_client: IntegrationInstance):
         """Test apt default security sources.
@@ -259,12 +264,12 @@ class TestDefaults:
         Ported from
         tests/cloud_tests/testcases/modules/apt_configure_security.py
         """
-        sources_list = class_client.read_from_file('/etc/apt/sources.list')
+        sources_list = class_client.read_from_file("/etc/apt/sources.list")
 
         # 3 lines from main, universe, and multiverse
-        assert 3 == sources_list.count('deb http://security.ubuntu.com/ubuntu')
+        assert 3 == sources_list.count("deb http://security.ubuntu.com/ubuntu")
         assert 3 == sources_list.count(
-            '# deb-src http://security.ubuntu.com/ubuntu'
+            "# deb-src http://security.ubuntu.com/ubuntu"
         )
 
 
@@ -280,10 +285,10 @@ def test_default_primary_with_uri(client: IntegrationInstance):
     Ported from
     tests/cloud_tests/testcases/modules/apt_configure_primary.py
     """
-    sources_list = client.read_from_file('/etc/apt/sources.list')
-    assert 'archive.ubuntu.com' not in sources_list
+    sources_list = client.read_from_file("/etc/apt/sources.list")
+    assert "archive.ubuntu.com" not in sources_list
 
-    assert 'something.random.invalid' in sources_list
+    assert "something.random.invalid" in sources_list
 
 
 DISABLED_DATA = """\
@@ -310,7 +315,7 @@ class TestDisabled:
         sources_list = class_client.execute(
             "cat /etc/apt/sources.list | grep -v '^#'"
         ).strip()
-        assert '' == sources_list
+        assert "" == sources_list
 
     def test_disable_apt_pipelining(self, class_client: IntegrationInstance):
         """Test disabling of apt pipelining.
@@ -319,7 +324,7 @@ class TestDisabled:
         tests/cloud_tests/testcases/modules/apt_pipelining_disable.py
         """
         conf = class_client.read_from_file(
-            '/etc/apt/apt.conf.d/90cloud-init-pipelining'
+            "/etc/apt/apt.conf.d/90cloud-init-pipelining"
         )
         assert 'Acquire::http::Pipeline-Depth "0";' in conf
 
@@ -338,8 +343,7 @@ apt:
 @pytest.mark.user_data(APT_PROXY_DATA)
 def test_apt_proxy(client: IntegrationInstance):
     """Test the apt proxy data gets written correctly."""
-    out = client.read_from_file(
-        '/etc/apt/apt.conf.d/90cloud-init-aptproxy')
+    out = client.read_from_file("/etc/apt/apt.conf.d/90cloud-init-aptproxy")
     assert 'Acquire::http::Proxy "http://proxy.internal:3128";' in out
     assert 'Acquire::http::Proxy "http://squid.internal:3128";' in out
     assert 'Acquire::ftp::Proxy "ftp://squid.internal:3128";' in out
diff --git a/tests/integration_tests/modules/test_ca_certs.py b/tests/integration_tests/modules/test_ca_certs.py
index 89c01a9c..d514fc62 100644
--- a/tests/integration_tests/modules/test_ca_certs.py
+++ b/tests/integration_tests/modules/test_ca_certs.py
@@ -10,7 +10,6 @@ import os.path
 
 import pytest
 
-
 USER_DATA = """\
 #cloud-config
 ca-certs:
diff --git a/tests/integration_tests/modules/test_cli.py b/tests/integration_tests/modules/test_cli.py
index 3f41b34d..97bfe52d 100644
--- a/tests/integration_tests/modules/test_cli.py
+++ b/tests/integration_tests/modules/test_cli.py
@@ -7,7 +7,6 @@ import pytest
 
 from tests.integration_tests.instances import IntegrationInstance
 
-
 VALID_USER_DATA = """\
 #cloud-config
 runcmd:
@@ -27,9 +26,9 @@ def test_valid_userdata(client: IntegrationInstance):
 
     PR #575
     """
-    result = client.execute('cloud-init devel schema --system')
+    result = client.execute("cloud-init devel schema --system")
     assert result.ok
-    assert 'Valid cloud-config: system userdata' == result.stdout.strip()
+    assert "Valid cloud-config: system userdata" == result.stdout.strip()
 
 
 @pytest.mark.sru_2020_11
@@ -39,7 +38,7 @@ def test_invalid_userdata(client: IntegrationInstance):
 
     PR #575
     """
-    result = client.execute('cloud-init devel schema --system')
+    result = client.execute("cloud-init devel schema --system")
     assert not result.ok
-    assert 'Cloud config schema errors' in result.stderr
+    assert "Cloud config schema errors" in result.stderr
     assert 'needs to begin with "#cloud-config"' in result.stderr
diff --git a/tests/integration_tests/modules/test_combined.py b/tests/integration_tests/modules/test_combined.py
index 26a8397d..c88f40d3 100644
--- a/tests/integration_tests/modules/test_combined.py
+++ b/tests/integration_tests/modules/test_combined.py
@@ -6,9 +6,10 @@ the same instance launch. Most independent module coherence tests can go
 here.
 """
 import json
-import pytest
 import re
 
+import pytest
+
 from tests.integration_tests.clouds import ImageSpecification
 from tests.integration_tests.instances import IntegrationInstance
 from tests.integration_tests.util import (
@@ -76,7 +77,7 @@ class TestCombined:
         Also tests LP 1511485: final_message is silent.
         """
         client = class_client
-        log = client.read_from_file('/var/log/cloud-init.log')
+        log = client.read_from_file("/var/log/cloud-init.log")
         expected = (
             "This is my final message!\n"
             r"\d+\.\d+.*\n"
@@ -94,10 +95,10 @@ class TestCombined:
         configuring the archives.
         """
         client = class_client
-        log = client.read_from_file('/var/log/cloud-init.log')
-        assert 'W: Failed to fetch' not in log
-        assert 'W: Some index files failed to download' not in log
-        assert 'E: Unable to locate package ntp' not in log
+        log = client.read_from_file("/var/log/cloud-init.log")
+        assert "W: Failed to fetch" not in log
+        assert "W: Some index files failed to download" not in log
+        assert "E: Unable to locate package ntp" not in log
 
     def test_byobu(self, class_client: IntegrationInstance):
         """Test byobu configured as enabled by default."""
@@ -107,22 +108,18 @@ class TestCombined:
     def test_configured_locale(self, class_client: IntegrationInstance):
         """Test locale can be configured correctly."""
         client = class_client
-        default_locale = client.read_from_file('/etc/default/locale')
-        assert 'LANG=en_GB.UTF-8' in default_locale
+        default_locale = client.read_from_file("/etc/default/locale")
+        assert "LANG=en_GB.UTF-8" in default_locale
 
-        locale_a = client.execute('locale -a')
-        verify_ordered_items_in_text([
-            'en_GB.utf8',
-            'en_US.utf8'
-        ], locale_a)
+        locale_a = client.execute("locale -a")
+        verify_ordered_items_in_text(["en_GB.utf8", "en_US.utf8"], locale_a)
 
         locale_gen = client.execute(
             "cat /etc/locale.gen | grep -v '^#' | uniq"
         )
-        verify_ordered_items_in_text([
-            'en_GB.UTF-8',
-            'en_US.UTF-8'
-        ], locale_gen)
+        verify_ordered_items_in_text(
+            ["en_GB.UTF-8", "en_US.UTF-8"], locale_gen
+        )
 
     def test_random_seed_data(self, class_client: IntegrationInstance):
         """Integration test for the random seed module.
@@ -141,12 +138,12 @@ class TestCombined:
     def test_rsyslog(self, class_client: IntegrationInstance):
         """Test rsyslog is configured correctly."""
         client = class_client
-        assert 'My test log' in client.read_from_file('/var/tmp/rsyslog.log')
+        assert "My test log" in client.read_from_file("/var/tmp/rsyslog.log")
 
     def test_runcmd(self, class_client: IntegrationInstance):
         """Test runcmd works as expected"""
         client = class_client
-        assert 'hello world' == client.read_from_file('/var/tmp/runcmd_output')
+        assert "hello world" == client.read_from_file("/var/tmp/runcmd_output")
 
     @retry(tries=30, delay=1)
     def test_ssh_import_id(self, class_client: IntegrationInstance):
@@ -160,11 +157,10 @@ class TestCombined:
         /home/ubuntu; this will need modification to run on other OSes.
         """
         client = class_client
-        ssh_output = client.read_from_file(
-            "/home/ubuntu/.ssh/authorized_keys")
+        ssh_output = client.read_from_file("/home/ubuntu/.ssh/authorized_keys")
 
-        assert '# ssh-import-id gh:powersj' in ssh_output
-        assert '# ssh-import-id lp:smoser' in ssh_output
+        assert "# ssh-import-id gh:powersj" in ssh_output
+        assert "# ssh-import-id lp:smoser" in ssh_output
 
     def test_snap(self, class_client: IntegrationInstance):
         """Integration test for the snap module.
@@ -185,21 +181,22 @@ class TestCombined:
         """
         client = class_client
         timezone_output = client.execute(
-            'date "+%Z" --date="Thu, 03 Nov 2016 00:47:00 -0400"')
+            'date "+%Z" --date="Thu, 03 Nov 2016 00:47:00 -0400"'
+        )
         assert timezone_output.strip() == "HDT"
 
     def test_no_problems(self, class_client: IntegrationInstance):
         """Test no errors, warnings, or tracebacks"""
         client = class_client
-        status_file = client.read_from_file('/run/cloud-init/status.json')
-        status_json = json.loads(status_file)['v1']
-        for stage in ('init', 'init-local', 'modules-config', 'modules-final'):
-            assert status_json[stage]['errors'] == []
-        result_file = client.read_from_file('/run/cloud-init/result.json')
-        result_json = json.loads(result_file)['v1']
-        assert result_json['errors'] == []
-
-        log = client.read_from_file('/var/log/cloud-init.log')
+        status_file = client.read_from_file("/run/cloud-init/status.json")
+        status_json = json.loads(status_file)["v1"]
+        for stage in ("init", "init-local", "modules-config", "modules-final"):
+            assert status_json[stage]["errors"] == []
+        result_file = client.read_from_file("/run/cloud-init/result.json")
+        result_json = json.loads(result_file)["v1"]
+        assert result_json["errors"] == []
+
+        log = client.read_from_file("/var/log/cloud-init.log")
         verify_clean_log(log)
 
     def test_correct_datasource_detected(
@@ -228,73 +225,81 @@ class TestCombined:
         )
 
     def _check_common_metadata(self, data):
-        assert data['base64_encoded_keys'] == []
-        assert data['merged_cfg'] == 'redacted for non-root user'
+        assert data["base64_encoded_keys"] == []
+        assert data["merged_cfg"] == "redacted for non-root user"
 
         image_spec = ImageSpecification.from_os_image()
-        assert data['sys_info']['dist'][0] == image_spec.os
+        assert data["sys_info"]["dist"][0] == image_spec.os
 
-        v1_data = data['v1']
-        assert re.match(r'\d\.\d+\.\d+-\d+', v1_data['kernel_release'])
-        assert v1_data['variant'] == image_spec.os
-        assert v1_data['distro'] == image_spec.os
-        assert v1_data['distro_release'] == image_spec.release
-        assert v1_data['machine'] == 'x86_64'
-        assert re.match(r'3.\d\.\d', v1_data['python_version'])
+        v1_data = data["v1"]
+        assert re.match(r"\d\.\d+\.\d+-\d+", v1_data["kernel_release"])
+        assert v1_data["variant"] == image_spec.os
+        assert v1_data["distro"] == image_spec.os
+        assert v1_data["distro_release"] == image_spec.release
+        assert v1_data["machine"] == "x86_64"
+        assert re.match(r"3.\d\.\d", v1_data["python_version"])
 
     @pytest.mark.lxd_container
     def test_instance_json_lxd(self, class_client: IntegrationInstance):
         client = class_client
         instance_json_file = client.read_from_file(
-            '/run/cloud-init/instance-data.json')
+            "/run/cloud-init/instance-data.json"
+        )
 
         data = json.loads(instance_json_file)
         self._check_common_metadata(data)
-        v1_data = data['v1']
-        assert v1_data['cloud_name'] == 'unknown'
-        assert v1_data['platform'] == 'lxd'
-        assert v1_data['subplatform'] == (
-            'seed-dir (/var/lib/cloud/seed/nocloud-net)')
-        assert v1_data['availability_zone'] is None
-        assert v1_data['instance_id'] == client.instance.name
-        assert v1_data['local_hostname'] == client.instance.name
-        assert v1_data['region'] is None
+        v1_data = data["v1"]
+        assert v1_data["cloud_name"] == "unknown"
+        assert v1_data["platform"] == "lxd"
+        assert (
+            v1_data["subplatform"]
+            == "seed-dir (/var/lib/cloud/seed/nocloud-net)"
+        )
+        assert v1_data["availability_zone"] is None
+        assert v1_data["instance_id"] == client.instance.name
+        assert v1_data["local_hostname"] == client.instance.name
+        assert v1_data["region"] is None
 
     @pytest.mark.lxd_vm
     def test_instance_json_lxd_vm(self, class_client: IntegrationInstance):
         client = class_client
         instance_json_file = client.read_from_file(
-            '/run/cloud-init/instance-data.json')
+            "/run/cloud-init/instance-data.json"
+        )
 
         data = json.loads(instance_json_file)
         self._check_common_metadata(data)
-        v1_data = data['v1']
-        assert v1_data['cloud_name'] == 'unknown'
-        assert v1_data['platform'] == 'lxd'
-        assert any([
-            '/var/lib/cloud/seed/nocloud-net' in v1_data['subplatform'],
-            '/dev/sr0' in v1_data['subplatform']
-        ])
-        assert v1_data['availability_zone'] is None
-        assert v1_data['instance_id'] == client.instance.name
-        assert v1_data['local_hostname'] == client.instance.name
-        assert v1_data['region'] is None
+        v1_data = data["v1"]
+        assert v1_data["cloud_name"] == "unknown"
+        assert v1_data["platform"] == "lxd"
+        assert any(
+            [
+                "/var/lib/cloud/seed/nocloud-net" in v1_data["subplatform"],
+                "/dev/sr0" in v1_data["subplatform"],
+            ]
+        )
+        assert v1_data["availability_zone"] is None
+        assert v1_data["instance_id"] == client.instance.name
+        assert v1_data["local_hostname"] == client.instance.name
+        assert v1_data["region"] is None
 
     @pytest.mark.ec2
     def test_instance_json_ec2(self, class_client: IntegrationInstance):
         client = class_client
         instance_json_file = client.read_from_file(
-            '/run/cloud-init/instance-data.json')
+            "/run/cloud-init/instance-data.json"
+        )
         data = json.loads(instance_json_file)
-        v1_data = data['v1']
-        assert v1_data['cloud_name'] == 'aws'
-        assert v1_data['platform'] == 'ec2'
-        assert v1_data['subplatform'].startswith('metadata')
-        assert v1_data[
-            'availability_zone'] == client.instance.availability_zone
-        assert v1_data['instance_id'] == client.instance.name
-        assert v1_data['local_hostname'].startswith('ip-')
-        assert v1_data['region'] == client.cloud.cloud_instance.region
+        v1_data = data["v1"]
+        assert v1_data["cloud_name"] == "aws"
+        assert v1_data["platform"] == "ec2"
+        assert v1_data["subplatform"].startswith("metadata")
+        assert (
+            v1_data["availability_zone"] == client.instance.availability_zone
+        )
+        assert v1_data["instance_id"] == client.instance.name
+        assert v1_data["local_hostname"].startswith("ip-")
+        assert v1_data["region"] == client.cloud.cloud_instance.region
 
     @pytest.mark.gce
     def test_instance_json_gce(self, class_client: IntegrationInstance):
diff --git a/tests/integration_tests/modules/test_command_output.py b/tests/integration_tests/modules/test_command_output.py
index 8429873f..96525cac 100644
--- a/tests/integration_tests/modules/test_command_output.py
+++ b/tests/integration_tests/modules/test_command_output.py
@@ -8,7 +8,6 @@ import pytest
 
 from tests.integration_tests.instances import IntegrationInstance
 
-
 USER_DATA = """\
 #cloud-config
 output: { all: "| tee -a /var/log/cloud-init-test-output" }
@@ -18,5 +17,5 @@ final_message: "should be last line in cloud-init-test-output file"
 
 @pytest.mark.user_data(USER_DATA)
 def test_runcmd(client: IntegrationInstance):
-    log = client.read_from_file('/var/log/cloud-init-test-output')
-    assert 'should be last line in cloud-init-test-output file' in log
+    log = client.read_from_file("/var/log/cloud-init-test-output")
+    assert "should be last line in cloud-init-test-output file" in log
diff --git a/tests/integration_tests/modules/test_disk_setup.py b/tests/integration_tests/modules/test_disk_setup.py
index 9c9edc46..22277331 100644
--- a/tests/integration_tests/modules/test_disk_setup.py
+++ b/tests/integration_tests/modules/test_disk_setup.py
@@ -1,25 +1,29 @@
 import json
 import os
-import pytest
 from uuid import uuid4
+
+import pytest
 from pycloudlib.lxd.instance import LXDInstance
 
 from cloudinit.subp import subp
 from tests.integration_tests.instances import IntegrationInstance
 from tests.integration_tests.util import verify_clean_log
 
-DISK_PATH = '/tmp/test_disk_setup_{}'.format(uuid4())
+DISK_PATH = "/tmp/test_disk_setup_{}".format(uuid4())
 
 
 def setup_and_mount_lxd_disk(instance: LXDInstance):
-    subp('lxc config device add {} test-disk-setup-disk disk source={}'.format(
-        instance.name, DISK_PATH).split())
+    subp(
+        "lxc config device add {} test-disk-setup-disk disk source={}".format(
+            instance.name, DISK_PATH
+        ).split()
+    )
 
 
 @pytest.yield_fixture
 def create_disk():
     # 640k should be enough for anybody
-    subp('dd if=/dev/zero of={} bs=1k count=640'.format(DISK_PATH).split())
+    subp("dd if=/dev/zero of={} bs=1k count=640".format(DISK_PATH).split())
     yield
     os.remove(DISK_PATH)
 
@@ -54,21 +58,21 @@ class TestDeviceAliases:
     """Test devices aliases work on disk setup/mount"""
 
     def test_device_alias(self, create_disk, client: IntegrationInstance):
-        log = client.read_from_file('/var/log/cloud-init.log')
+        log = client.read_from_file("/var/log/cloud-init.log")
         assert (
-            "updated disk_setup device entry 'my_alias' to '/dev/sdb'"
-        ) in log
-        assert 'changed my_alias.1 => /dev/sdb1' in log
-        assert 'changed my_alias.2 => /dev/sdb2' in log
+            "updated disk_setup device entry 'my_alias' to '/dev/sdb'" in log
+        )
+        assert "changed my_alias.1 => /dev/sdb1" in log
+        assert "changed my_alias.2 => /dev/sdb2" in log
         verify_clean_log(log)
 
-        lsblk = json.loads(client.execute('lsblk --json'))
-        sdb = [x for x in lsblk['blockdevices'] if x['name'] == 'sdb'][0]
-        assert len(sdb['children']) == 2
-        assert sdb['children'][0]['name'] == 'sdb1'
-        assert sdb['children'][0]['mountpoint'] == '/mnt1'
-        assert sdb['children'][1]['name'] == 'sdb2'
-        assert sdb['children'][1]['mountpoint'] == '/mnt2'
+        lsblk = json.loads(client.execute("lsblk --json"))
+        sdb = [x for x in lsblk["blockdevices"] if x["name"] == "sdb"][0]
+        assert len(sdb["children"]) == 2
+        assert sdb["children"][0]["name"] == "sdb1"
+        assert sdb["children"][0]["mountpoint"] == "/mnt1"
+        assert sdb["children"][1]["name"] == "sdb2"
+        assert sdb["children"][1]["mountpoint"] == "/mnt2"
 
 
 PARTPROBE_USERDATA = """\
@@ -121,13 +125,13 @@ class TestPartProbeAvailability:
 
     def _verify_first_disk_setup(self, client, log):
         verify_clean_log(log)
-        lsblk = json.loads(client.execute('lsblk --json'))
-        sdb = [x for x in lsblk['blockdevices'] if x['name'] == 'sdb'][0]
-        assert len(sdb['children']) == 2
-        assert sdb['children'][0]['name'] == 'sdb1'
-        assert sdb['children'][0]['mountpoint'] == '/mnt1'
-        assert sdb['children'][1]['name'] == 'sdb2'
-        assert sdb['children'][1]['mountpoint'] == '/mnt2'
+        lsblk = json.loads(client.execute("lsblk --json"))
+        sdb = [x for x in lsblk["blockdevices"] if x["name"] == "sdb"][0]
+        assert len(sdb["children"]) == 2
+        assert sdb["children"][0]["name"] == "sdb1"
+        assert sdb["children"][0]["mountpoint"] == "/mnt1"
+        assert sdb["children"][1]["name"] == "sdb2"
+        assert sdb["children"][1]["mountpoint"] == "/mnt2"
 
     # Not bionic or xenial because the LXD agent gets in the way of us
     # changing the userdata
@@ -148,13 +152,13 @@ class TestPartProbeAvailability:
         with a warning and a traceback. When partprobe is in use, everything
         should work successfully.
         """
-        log = client.read_from_file('/var/log/cloud-init.log')
+        log = client.read_from_file("/var/log/cloud-init.log")
         self._verify_first_disk_setup(client, log)
 
         # Update our userdata and cloud.cfg to mount then perform new disk
         # setup
         client.write_to_file(
-            '/var/lib/cloud/seed/nocloud-net/user-data',
+            "/var/lib/cloud/seed/nocloud-net/user-data",
             UPDATED_PARTPROBE_USERDATA,
         )
         client.execute(
@@ -162,17 +166,17 @@ class TestPartProbeAvailability:
             "/etc/cloud/cloud.cfg"
         )
 
-        client.execute('cloud-init clean --logs')
+        client.execute("cloud-init clean --logs")
         client.restart()
 
         # Assert new setup works as expected
         verify_clean_log(log)
 
-        lsblk = json.loads(client.execute('lsblk --json'))
-        sdb = [x for x in lsblk['blockdevices'] if x['name'] == 'sdb'][0]
-        assert len(sdb['children']) == 1
-        assert sdb['children'][0]['name'] == 'sdb1'
-        assert sdb['children'][0]['mountpoint'] == '/mnt3'
+        lsblk = json.loads(client.execute("lsblk --json"))
+        sdb = [x for x in lsblk["blockdevices"] if x["name"] == "sdb"][0]
+        assert len(sdb["children"]) == 1
+        assert sdb["children"][0]["name"] == "sdb1"
+        assert sdb["children"][0]["mountpoint"] == "/mnt3"
 
     def test_disk_setup_no_partprobe(
         self, create_disk, client: IntegrationInstance
@@ -180,11 +184,11 @@ class TestPartProbeAvailability:
         """Ensure disk setup still works as expected without partprobe."""
         # We can't do this part in a bootcmd because the path has already
         # been found by the time we get to the bootcmd
-        client.execute('rm $(which partprobe)')
-        client.execute('cloud-init clean --logs')
+        client.execute("rm $(which partprobe)")
+        client.execute("cloud-init clean --logs")
         client.restart()
 
-        log = client.read_from_file('/var/log/cloud-init.log')
+        log = client.read_from_file("/var/log/cloud-init.log")
         self._verify_first_disk_setup(client, log)
 
-        assert 'partprobe' not in log
+        assert "partprobe" not in log
diff --git a/tests/integration_tests/modules/test_growpart.py b/tests/integration_tests/modules/test_growpart.py
index af1e3a15..67251817 100644
--- a/tests/integration_tests/modules/test_growpart.py
+++ b/tests/integration_tests/modules/test_growpart.py
@@ -1,22 +1,26 @@
+import json
 import os
-import pytest
 import pathlib
-import json
 from uuid import uuid4
+
+import pytest
 from pycloudlib.lxd.instance import LXDInstance
 
 from cloudinit.subp import subp
 from tests.integration_tests.instances import IntegrationInstance
 
-DISK_PATH = '/tmp/test_disk_setup_{}'.format(uuid4())
+DISK_PATH = "/tmp/test_disk_setup_{}".format(uuid4())
 
 
 def setup_and_mount_lxd_disk(instance: LXDInstance):
-    subp('lxc config device add {} test-disk-setup-disk disk source={}'.format(
-        instance.name, DISK_PATH).split())
+    subp(
+        "lxc config device add {} test-disk-setup-disk disk source={}".format(
+            instance.name, DISK_PATH
+        ).split()
+    )
 
 
-@pytest.fixture(scope='class', autouse=True)
+@pytest.fixture(scope="class", autouse=True)
 def create_disk():
     """Create 16M sparse file"""
     pathlib.Path(DISK_PATH).touch()
@@ -50,13 +54,15 @@ class TestGrowPart:
     """Test growpart"""
 
     def test_grow_part(self, client: IntegrationInstance):
-        """Verify """
-        log = client.read_from_file('/var/log/cloud-init.log')
-        assert ("cc_growpart.py[INFO]: '/dev/sdb1' resized:"
-                " changed (/dev/sdb, 1) from") in log
-
-        lsblk = json.loads(client.execute('lsblk --json'))
-        sdb = [x for x in lsblk['blockdevices'] if x['name'] == 'sdb'][0]
-        assert len(sdb['children']) == 1
-        assert sdb['children'][0]['name'] == 'sdb1'
-        assert sdb['size'] == '16M'
+        """Verify"""
+        log = client.read_from_file("/var/log/cloud-init.log")
+        assert (
+            "cc_growpart.py[INFO]: '/dev/sdb1' resized:"
+            " changed (/dev/sdb, 1) from" in log
+        )
+
+        lsblk = json.loads(client.execute("lsblk --json"))
+        sdb = [x for x in lsblk["blockdevices"] if x["name"] == "sdb"][0]
+        assert len(sdb["children"]) == 1
+        assert sdb["children"][0]["name"] == "sdb1"
+        assert sdb["size"] == "16M"
diff --git a/tests/integration_tests/modules/test_hotplug.py b/tests/integration_tests/modules/test_hotplug.py
index f5abc86f..0bad761e 100644
--- a/tests/integration_tests/modules/test_hotplug.py
+++ b/tests/integration_tests/modules/test_hotplug.py
@@ -1,8 +1,9 @@
-import pytest
 import time
-import yaml
 from collections import namedtuple
 
+import pytest
+import yaml
+
 from tests.integration_tests.instances import IntegrationInstance
 
 USER_DATA = """\
@@ -12,28 +13,28 @@ updates:
     when: ['hotplug']
 """
 
-ip_addr = namedtuple('ip_addr', 'interface state ip4 ip6')
+ip_addr = namedtuple("ip_addr", "interface state ip4 ip6")
 
 
 def _wait_till_hotplug_complete(client, expected_runs=1):
     for _ in range(60):
-        log = client.read_from_file('/var/log/cloud-init.log')
-        if log.count('Exiting hotplug handler') == expected_runs:
+        log = client.read_from_file("/var/log/cloud-init.log")
+        if log.count("Exiting hotplug handler") == expected_runs:
             return log
         time.sleep(1)
-    raise Exception('Waiting for hotplug handler failed')
+    raise Exception("Waiting for hotplug handler failed")
 
 
 def _get_ip_addr(client):
     ips = []
-    lines = client.execute('ip --brief addr').split('\n')
+    lines = client.execute("ip --brief addr").split("\n")
     for line in lines:
         attributes = line.split()
         interface, state = attributes[0], attributes[1]
         ip4_cidr = attributes[2] if len(attributes) > 2 else None
         ip6_cidr = attributes[3] if len(attributes) > 3 else None
-        ip4 = ip4_cidr.split('/')[0] if ip4_cidr else None
-        ip6 = ip6_cidr.split('/')[0] if ip6_cidr else None
+        ip4 = ip4_cidr.split("/")[0] if ip4_cidr else None
+        ip6 = ip6_cidr.split("/")[0] if ip6_cidr else None
         ip = ip_addr(interface, state, ip4, ip6)
         ips.append(ip)
     return ips
@@ -47,10 +48,10 @@ def _get_ip_addr(client):
 @pytest.mark.user_data(USER_DATA)
 def test_hotplug_add_remove(client: IntegrationInstance):
     ips_before = _get_ip_addr(client)
-    log = client.read_from_file('/var/log/cloud-init.log')
-    assert 'Exiting hotplug handler' not in log
+    log = client.read_from_file("/var/log/cloud-init.log")
+    assert "Exiting hotplug handler" not in log
     assert client.execute(
-        'test -f /etc/udev/rules.d/10-cloud-init-hook-hotplug.rules'
+        "test -f /etc/udev/rules.d/10-cloud-init-hook-hotplug.rules"
     ).ok
 
     # Add new NIC
@@ -62,11 +63,11 @@ def test_hotplug_add_remove(client: IntegrationInstance):
     assert len(ips_after_add) == len(ips_before) + 1
     assert added_ip not in [ip.ip4 for ip in ips_before]
     assert added_ip in [ip.ip4 for ip in ips_after_add]
-    assert new_addition.state == 'UP'
+    assert new_addition.state == "UP"
 
-    netplan_cfg = client.read_from_file('/etc/netplan/50-cloud-init.yaml')
+    netplan_cfg = client.read_from_file("/etc/netplan/50-cloud-init.yaml")
     config = yaml.safe_load(netplan_cfg)
-    assert new_addition.interface in config['network']['ethernets']
+    assert new_addition.interface in config["network"]["ethernets"]
 
     # Remove new NIC
     client.instance.remove_network_interface(added_ip)
@@ -75,37 +76,37 @@ def test_hotplug_add_remove(client: IntegrationInstance):
     assert len(ips_after_remove) == len(ips_before)
     assert added_ip not in [ip.ip4 for ip in ips_after_remove]
 
-    netplan_cfg = client.read_from_file('/etc/netplan/50-cloud-init.yaml')
+    netplan_cfg = client.read_from_file("/etc/netplan/50-cloud-init.yaml")
     config = yaml.safe_load(netplan_cfg)
-    assert new_addition.interface not in config['network']['ethernets']
+    assert new_addition.interface not in config["network"]["ethernets"]
 
-    assert 'enabled' == client.execute(
-        'cloud-init devel hotplug-hook -s net query'
+    assert "enabled" == client.execute(
+        "cloud-init devel hotplug-hook -s net query"
     )
 
 
 @pytest.mark.openstack
 def test_no_hotplug_in_userdata(client: IntegrationInstance):
     ips_before = _get_ip_addr(client)
-    log = client.read_from_file('/var/log/cloud-init.log')
-    assert 'Exiting hotplug handler' not in log
+    log = client.read_from_file("/var/log/cloud-init.log")
+    assert "Exiting hotplug handler" not in log
     assert client.execute(
-        'test -f /etc/udev/rules.d/10-cloud-init-hook-hotplug.rules'
+        "test -f /etc/udev/rules.d/10-cloud-init-hook-hotplug.rules"
     ).failed
 
     # Add new NIC
     client.instance.add_network_interface()
-    log = client.read_from_file('/var/log/cloud-init.log')
-    assert 'hotplug-hook' not in log
+    log = client.read_from_file("/var/log/cloud-init.log")
+    assert "hotplug-hook" not in log
 
     ips_after_add = _get_ip_addr(client)
     if len(ips_after_add) == len(ips_before) + 1:
         # We can see the device, but it should not have been brought up
         new_ip = [ip for ip in ips_after_add if ip not in ips_before][0]
-        assert new_ip.state == 'DOWN'
+        assert new_ip.state == "DOWN"
     else:
         assert len(ips_after_add) == len(ips_before)
 
-    assert 'disabled' == client.execute(
-        'cloud-init devel hotplug-hook -s net query'
+    assert "disabled" == client.execute(
+        "cloud-init devel hotplug-hook -s net query"
     )
diff --git a/tests/integration_tests/modules/test_jinja_templating.py b/tests/integration_tests/modules/test_jinja_templating.py
index fe8eff1a..7788c6f0 100644
--- a/tests/integration_tests/modules/test_jinja_templating.py
+++ b/tests/integration_tests/modules/test_jinja_templating.py
@@ -4,7 +4,6 @@ import pytest
 from tests.integration_tests.instances import IntegrationInstance
 from tests.integration_tests.util import verify_ordered_items_in_text
 
-
 USER_DATA = """\
 ## template: jinja
 #cloud-config
@@ -23,12 +22,12 @@ def test_runcmd_with_variable_substitution(client: IntegrationInstance):
     we can also substitute variables from instance-data-sensitive
     LP: #1931392.
     """
-    hostname = client.execute('hostname').stdout.strip()
+    hostname = client.execute("hostname").stdout.strip()
     expected = [
         hostname,
-        ('Merged cloud-init system config from /etc/cloud/cloud.cfg and '
-            '/etc/cloud/cloud.cfg.d/'),
-        hostname
+        "Merged cloud-init system config from /etc/cloud/cloud.cfg and "
+        "/etc/cloud/cloud.cfg.d/",
+        hostname,
     ]
-    output = client.read_from_file('/var/tmp/runcmd_output')
+    output = client.read_from_file("/var/tmp/runcmd_output")
     verify_ordered_items_in_text(expected, output)
diff --git a/tests/integration_tests/modules/test_keys_to_console.py b/tests/integration_tests/modules/test_keys_to_console.py
index e79db3c7..50899982 100644
--- a/tests/integration_tests/modules/test_keys_to_console.py
+++ b/tests/integration_tests/modules/test_keys_to_console.py
@@ -36,6 +36,7 @@ users:
 @pytest.mark.user_data(BLACKLIST_USER_DATA)
 class TestKeysToConsoleBlacklist:
     """Test that the blacklist options work as expected."""
+
     @pytest.mark.parametrize("key_type", ["DSA", "ECDSA"])
     def test_excluded_keys(self, class_client, key_type):
         syslog = class_client.read_from_file("/var/log/syslog")
@@ -55,6 +56,7 @@ class TestAllKeysToConsoleBlacklist:
     """Test that when key blacklist contains all key types that
     no header/footer are output.
     """
+
     def test_header_excluded(self, class_client):
         syslog = class_client.read_from_file("/var/log/syslog")
         assert "BEGIN SSH HOST KEY FINGERPRINTS" not in syslog
@@ -67,6 +69,7 @@ class TestAllKeysToConsoleBlacklist:
 @pytest.mark.user_data(DISABLED_USER_DATA)
 class TestKeysToConsoleDisabled:
     """Test that output can be fully disabled."""
+
     @pytest.mark.parametrize("key_type", ["DSA", "ECDSA", "ED25519", "RSA"])
     def test_keys_excluded(self, class_client, key_type):
         syslog = class_client.read_from_file("/var/log/syslog")
@@ -90,7 +93,7 @@ class TestKeysToConsoleEnabled:
     """Test that output can be enabled disabled."""
 
     def test_duplicate_messaging_console_log(self, class_client):
-        class_client.execute('cloud-init status --wait --long').ok
+        class_client.execute("cloud-init status --wait --long").ok
         try:
             console_log = class_client.instance.console_log()
         except NotImplementedError:
@@ -98,13 +101,13 @@ class TestKeysToConsoleEnabled:
             # log
             pytest.skip("NotImplementedError when requesting console log")
             return
-        if console_log.lower() == 'no console output':
+        if console_log.lower() == "no console output":
             # This test retries because we might not have the full console log
             # on the first fetch. However, if we have no console output
             # at all, we don't want to keep retrying as that would trigger
             # another 5 minute wait on the pycloudlib side, which could
             # leave us waiting for a couple hours
-            pytest.fail('no console output')
+            pytest.fail("no console output")
             return
         msg = "no authorized SSH keys fingerprints found for user barfoo."
         assert 1 == console_log.count(msg)
diff --git a/tests/integration_tests/modules/test_lxd_bridge.py b/tests/integration_tests/modules/test_lxd_bridge.py
index 65dce3c7..2cb3f4f3 100644
--- a/tests/integration_tests/modules/test_lxd_bridge.py
+++ b/tests/integration_tests/modules/test_lxd_bridge.py
@@ -8,7 +8,6 @@ import yaml
 
 from tests.integration_tests.util import verify_clean_log
 
-
 USER_DATA = """\
 #cloud-config
 lxd:
@@ -29,7 +28,6 @@ lxd:
 @pytest.mark.no_container
 @pytest.mark.user_data(USER_DATA)
 class TestLxdBridge:
-
     @pytest.mark.parametrize("binary_name", ["lxc", "lxd"])
     def test_binaries_installed(self, class_client, binary_name):
         """Check that the expected LXD binaries are installed"""
diff --git a/tests/integration_tests/modules/test_ntp_servers.py b/tests/integration_tests/modules/test_ntp_servers.py
index c777a641..fc62e63b 100644
--- a/tests/integration_tests/modules/test_ntp_servers.py
+++ b/tests/integration_tests/modules/test_ntp_servers.py
@@ -9,8 +9,8 @@ and ``tests/cloud_tests/testcases/modules/ntp_chrony.yaml``)
 """
 import re
 
-import yaml
 import pytest
+import yaml
 
 from tests.integration_tests.instances import IntegrationInstance
 
@@ -33,13 +33,13 @@ EXPECTED_POOLS = yaml.safe_load(USER_DATA)["ntp"]["pools"]
 
 @pytest.mark.user_data(USER_DATA)
 class TestNtpServers:
-
     def test_ntp_installed(self, class_client: IntegrationInstance):
         """Test that `ntpd --version` succeeds, indicating installation."""
         assert class_client.execute("ntpd --version").ok
 
-    def test_dist_config_file_is_empty(self,
-                                       class_client: IntegrationInstance):
+    def test_dist_config_file_is_empty(
+        self, class_client: IntegrationInstance
+    ):
         """Test that the distributed config file is empty.
 
         (This test is skipped on all currently supported Ubuntu releases, so
@@ -56,13 +56,13 @@ class TestNtpServers:
             assert re.search(
                 r"^server {} iburst".format(expected_server),
                 ntp_conf,
-                re.MULTILINE
+                re.MULTILINE,
             )
         for expected_pool in EXPECTED_POOLS:
             assert re.search(
                 r"^pool {} iburst".format(expected_pool),
                 ntp_conf,
-                re.MULTILINE
+                re.MULTILINE,
             )
 
     def test_ntpq_servers(self, class_client: IntegrationInstance):
@@ -84,12 +84,12 @@ ntp:
 
 @pytest.mark.user_data(CHRONY_DATA)
 def test_chrony(client: IntegrationInstance):
-    if client.execute('test -f /etc/chrony.conf').ok:
-        chrony_conf = '/etc/chrony.conf'
+    if client.execute("test -f /etc/chrony.conf").ok:
+        chrony_conf = "/etc/chrony.conf"
     else:
-        chrony_conf = '/etc/chrony/chrony.conf'
+        chrony_conf = "/etc/chrony/chrony.conf"
     contents = client.read_from_file(chrony_conf)
-    assert 'server 172.16.15.14' in contents
+    assert "server 172.16.15.14" in contents
 
 
 TIMESYNCD_DATA = """\
@@ -105,9 +105,9 @@ ntp:
 @pytest.mark.user_data(TIMESYNCD_DATA)
 def test_timesyncd(client: IntegrationInstance):
     contents = client.read_from_file(
-        '/etc/systemd/timesyncd.conf.d/cloud-init.conf'
+        "/etc/systemd/timesyncd.conf.d/cloud-init.conf"
     )
-    assert 'NTP=172.16.15.14' in contents
+    assert "NTP=172.16.15.14" in contents
 
 
 EMPTY_NTP = """\
@@ -121,8 +121,8 @@ ntp:
 
 @pytest.mark.user_data(EMPTY_NTP)
 def test_empty_ntp(client: IntegrationInstance):
-    assert client.execute('ntpd --version').ok
-    assert client.execute('test -f /etc/ntp.conf.dist').failed
-    assert 'pool.ntp.org iburst' in client.execute(
+    assert client.execute("ntpd --version").ok
+    assert client.execute("test -f /etc/ntp.conf.dist").failed
+    assert "pool.ntp.org iburst" in client.execute(
         'grep -v "^#" /etc/ntp.conf'
     )
diff --git a/tests/integration_tests/modules/test_package_update_upgrade_install.py b/tests/integration_tests/modules/test_package_update_upgrade_install.py
index 28d741bc..d668d81c 100644
--- a/tests/integration_tests/modules/test_package_update_upgrade_install.py
+++ b/tests/integration_tests/modules/test_package_update_upgrade_install.py
@@ -13,8 +13,8 @@ NOTE: the testcase for this looks for the command in history.log as
 """
 
 import re
-import pytest
 
+import pytest
 
 USER_DATA = """\
 #cloud-config
@@ -29,7 +29,6 @@ package_upgrade: true
 @pytest.mark.ubuntu
 @pytest.mark.user_data(USER_DATA)
 class TestPackageUpdateUpgradeInstall:
-
     def assert_package_installed(self, pkg_out, name, version=None):
         """Check dpkg-query --show output for matching package name.
 
@@ -38,7 +37,8 @@ class TestPackageUpdateUpgradeInstall:
             version.
         """
         pkg_match = re.search(
-            "^%s\t(?P<version>.*)$" % name, pkg_out, re.MULTILINE)
+            "^%s\t(?P<version>.*)$" % name, pkg_out, re.MULTILINE
+        )
         if pkg_match:
             installed_version = pkg_match.group("version")
             if not version:
@@ -46,8 +46,10 @@ class TestPackageUpdateUpgradeInstall:
             if installed_version.startswith(version):
                 return  # Success
             raise AssertionError(
-                "Expected package version %s-%s not found. Found %s" %
-                name, version, installed_version)
+                "Expected package version %s-%s not found. Found %s" % name,
+                version,
+                installed_version,
+            )
         raise AssertionError("Package not installed: %s" % name)
 
     def test_new_packages_are_installed(self, class_client):
@@ -58,11 +60,13 @@ class TestPackageUpdateUpgradeInstall:
 
     def test_packages_were_updated(self, class_client):
         out = class_client.execute(
-            "grep ^Commandline: /var/log/apt/history.log")
+            "grep ^Commandline: /var/log/apt/history.log"
+        )
         assert (
             "Commandline: /usr/bin/apt-get --option=Dpkg::Options"
             "::=--force-confold --option=Dpkg::options::=--force-unsafe-io "
-            "--assume-yes --quiet install sl tree") in out
+            "--assume-yes --quiet install sl tree" in out
+        )
 
     def test_packages_were_upgraded(self, class_client):
         """Test cloud-init-output for install & upgrade stuff."""
diff --git a/tests/integration_tests/modules/test_persistence.py b/tests/integration_tests/modules/test_persistence.py
index 00fdeaea..33527e1e 100644
--- a/tests/integration_tests/modules/test_persistence.py
+++ b/tests/integration_tests/modules/test_persistence.py
@@ -10,21 +10,23 @@ from tests.integration_tests.util import (
     verify_ordered_items_in_text,
 )
 
-
-PICKLE_PATH = Path('/var/lib/cloud/instance/obj.pkl')
-TEST_PICKLE = ASSETS_DIR / 'trusty_with_mime.pkl'
+PICKLE_PATH = Path("/var/lib/cloud/instance/obj.pkl")
+TEST_PICKLE = ASSETS_DIR / "trusty_with_mime.pkl"
 
 
 @pytest.mark.lxd_container
 def test_log_message_on_missing_version_file(client: IntegrationInstance):
     client.push_file(TEST_PICKLE, PICKLE_PATH)
     client.restart()
-    assert client.execute('cloud-init status --wait').ok
-    log = client.read_from_file('/var/log/cloud-init.log')
-    verify_ordered_items_in_text([
-        "Unable to unpickle datasource: 'MIMEMultipart' object has no "
-        "attribute 'policy'. Ignoring current cache.",
-        'no cache found',
-        'Searching for local data source',
-        'SUCCESS: found local data from DataSourceNoCloud'
-    ], log)
+    assert client.execute("cloud-init status --wait").ok
+    log = client.read_from_file("/var/log/cloud-init.log")
+    verify_ordered_items_in_text(
+        [
+            "Unable to unpickle datasource: 'MIMEMultipart' object has no "
+            "attribute 'policy'. Ignoring current cache.",
+            "no cache found",
+            "Searching for local data source",
+            "SUCCESS: found local data from DataSourceNoCloud",
+        ],
+        log,
+    )
diff --git a/tests/integration_tests/modules/test_power_state_change.py b/tests/integration_tests/modules/test_power_state_change.py
index 5f3a32ac..a629029d 100644
--- a/tests/integration_tests/modules/test_power_state_change.py
+++ b/tests/integration_tests/modules/test_power_state_change.py
@@ -30,7 +30,7 @@ def _detect_reboot(instance: IntegrationInstance):
     instance.instance.wait()
     for _ in range(600):
         try:
-            log = instance.read_from_file('/var/log/cloud-init.log')
+            log = instance.read_from_file("/var/log/cloud-init.log")
             boot_count = log.count("running 'init-local'")
             if boot_count == 1:
                 instance.instance.wait()
@@ -40,11 +40,11 @@ def _detect_reboot(instance: IntegrationInstance):
             pass
         time.sleep(1)
     else:
-        raise Exception('Could not detect reboot')
+        raise Exception("Could not detect reboot")
 
 
 def _can_connect(instance):
-    return instance.execute('true').ok
+    return instance.execute("true").ok
 
 
 # This test is marked unstable because even though it should be able to
@@ -55,36 +55,44 @@ def _can_connect(instance):
 @pytest.mark.ubuntu
 @pytest.mark.lxd_container
 class TestPowerChange:
-    @pytest.mark.parametrize('mode,delay,timeout,expected', [
-        ('poweroff', 'now', '10', 'will execute: shutdown -P now msg'),
-        ('reboot', 'now', '0', 'will execute: shutdown -r now msg'),
-        ('halt', '+1', '0', 'will execute: shutdown -H +1 msg'),
-    ])
-    def test_poweroff(self, session_cloud: IntegrationCloud,
-                      mode, delay, timeout, expected):
+    @pytest.mark.parametrize(
+        "mode,delay,timeout,expected",
+        [
+            ("poweroff", "now", "10", "will execute: shutdown -P now msg"),
+            ("reboot", "now", "0", "will execute: shutdown -r now msg"),
+            ("halt", "+1", "0", "will execute: shutdown -H +1 msg"),
+        ],
+    )
+    def test_poweroff(
+        self, session_cloud: IntegrationCloud, mode, delay, timeout, expected
+    ):
         with session_cloud.launch(
             user_data=USER_DATA.format(
-                delay=delay, mode=mode, timeout=timeout, condition='true'),
-            launch_kwargs={'wait': False},
+                delay=delay, mode=mode, timeout=timeout, condition="true"
+            ),
+            launch_kwargs={"wait": False},
         ) as instance:
-            if mode == 'reboot':
+            if mode == "reboot":
                 _detect_reboot(instance)
             else:
                 instance.instance.wait_for_stop()
                 instance.instance.start(wait=True)
-            log = instance.read_from_file('/var/log/cloud-init.log')
+            log = instance.read_from_file("/var/log/cloud-init.log")
             assert _can_connect(instance)
         lines_to_check = [
-            'Running module power-state-change',
+            "Running module power-state-change",
             expected,
             "running 'init-local'",
-            'config-power-state-change already ran',
+            "config-power-state-change already ran",
         ]
         verify_ordered_items_in_text(lines_to_check, log)
 
-    @pytest.mark.user_data(USER_DATA.format(delay='0', mode='poweroff',
-                                            timeout='0', condition='false'))
+    @pytest.mark.user_data(
+        USER_DATA.format(
+            delay="0", mode="poweroff", timeout="0", condition="false"
+        )
+    )
     def test_poweroff_false_condition(self, client: IntegrationInstance):
-        log = client.read_from_file('/var/log/cloud-init.log')
+        log = client.read_from_file("/var/log/cloud-init.log")
         assert _can_connect(client)
-        assert 'Condition was false. Will not perform state change' in log
+        assert "Condition was false. Will not perform state change" in log
diff --git a/tests/integration_tests/modules/test_puppet.py b/tests/integration_tests/modules/test_puppet.py
index f40a6ca3..1bd9cee4 100644
--- a/tests/integration_tests/modules/test_puppet.py
+++ b/tests/integration_tests/modules/test_puppet.py
@@ -15,9 +15,9 @@ puppet:
 @pytest.mark.user_data(SERVICE_DATA)
 def test_puppet_service(client: IntegrationInstance):
     """Basic test that puppet gets installed and runs."""
-    log = client.read_from_file('/var/log/cloud-init.log')
+    log = client.read_from_file("/var/log/cloud-init.log")
     verify_clean_log(log)
-    assert client.execute('systemctl is-active puppet').ok
+    assert client.execute("systemctl is-active puppet").ok
     assert "Running command ['puppet', 'agent'" not in log
 
 
@@ -35,5 +35,5 @@ puppet:
 @pytest.mark.user_data(EXEC_DATA)
 def test_pupet_exec(client: IntegrationInstance):
     """Basic test that puppet gets installed and runs."""
-    log = client.read_from_file('/var/log/cloud-init.log')
+    log = client.read_from_file("/var/log/cloud-init.log")
     assert "Running command ['puppet', 'agent', '--noop']" in log
diff --git a/tests/integration_tests/modules/test_set_hostname.py b/tests/integration_tests/modules/test_set_hostname.py
index e7f7f6b6..ae0aeae9 100644
--- a/tests/integration_tests/modules/test_set_hostname.py
+++ b/tests/integration_tests/modules/test_set_hostname.py
@@ -11,7 +11,6 @@ after the system is boot.
 
 import pytest
 
-
 USER_DATA_HOSTNAME = """\
 #cloud-config
 hostname: cloudinit2
@@ -34,7 +33,6 @@ fqdn: cloudinit2.test.io
 
 @pytest.mark.ci
 class TestHostname:
-
     @pytest.mark.user_data(USER_DATA_HOSTNAME)
     def test_hostname(self, client):
         hostname_output = client.execute("hostname")
@@ -59,6 +57,8 @@ class TestHostname:
         assert "cloudinit2.i9n.cloud-init.io" in fqdn_output.strip()
 
         host_output = client.execute("grep ^127 /etc/hosts")
-        assert '127.0.1.1 {} {}'.format(
-            fqdn_output, hostname_output) in host_output
-        assert '127.0.0.1 localhost' in host_output
+        assert (
+            "127.0.1.1 {} {}".format(fqdn_output, hostname_output)
+            in host_output
+        )
+        assert "127.0.0.1 localhost" in host_output
diff --git a/tests/integration_tests/modules/test_set_password.py b/tests/integration_tests/modules/test_set_password.py
index ac9db19d..e0f8b692 100644
--- a/tests/integration_tests/modules/test_set_password.py
+++ b/tests/integration_tests/modules/test_set_password.py
@@ -15,7 +15,6 @@ import yaml
 
 from tests.integration_tests.util import retry
 
-
 COMMON_USER_DATA = """\
 #cloud-config
 ssh_pwauth: yes
@@ -42,7 +41,9 @@ Uh69tP4GSrGW5XKHxMLiKowJgm/"
     lock_passwd: false
 """
 
-LIST_USER_DATA = COMMON_USER_DATA + """
+LIST_USER_DATA = (
+    COMMON_USER_DATA
+    + """
 chpasswd:
   list:
     - tom:mypassword123!
@@ -50,8 +51,11 @@ chpasswd:
     - harry:RANDOM
     - mikey:$5$xZ$B2YGGEx2AOf4PeW48KC6.QyT1W2B4rZ9Qbltudtha89
 """
+)
 
-STRING_USER_DATA = COMMON_USER_DATA + """
+STRING_USER_DATA = (
+    COMMON_USER_DATA
+    + """
 chpasswd:
     list: |
       tom:mypassword123!
@@ -59,6 +63,7 @@ chpasswd:
       harry:RANDOM
       mikey:$5$xZ$B2YGGEx2AOf4PeW48KC6.QyT1W2B4rZ9Qbltudtha89
 """
+)
 
 USERS_DICTS = yaml.safe_load(COMMON_USER_DATA)["users"]
 USERS_PASSWD_VALUES = {
@@ -141,13 +146,13 @@ class Mixin:
             # log
             pytest.skip("NotImplementedError when requesting console log")
             return
-        if console_log.lower() == 'no console output':
+        if console_log.lower() == "no console output":
             # This test retries because we might not have the full console log
             # on the first fetch. However, if we have no console output
             # at all, we don't want to keep retrying as that would trigger
             # another 5 minute wait on the pycloudlib side, which could
             # leave us waiting for a couple hours
-            pytest.fail('no console output')
+            pytest.fail("no console output")
             return
         assert "dick:" in console_log
         assert "harry:" in console_log
diff --git a/tests/integration_tests/modules/test_ssh_auth_key_fingerprints.py b/tests/integration_tests/modules/test_ssh_auth_key_fingerprints.py
index cf14d0b0..89b49576 100644
--- a/tests/integration_tests/modules/test_ssh_auth_key_fingerprints.py
+++ b/tests/integration_tests/modules/test_ssh_auth_key_fingerprints.py
@@ -14,7 +14,6 @@ import pytest
 
 from tests.integration_tests.util import retry
 
-
 USER_DATA_SSH_AUTHKEY_DISABLE = """\
 #cloud-config
 no_ssh_fingerprints: true
@@ -32,13 +31,13 @@ ssh_authorized_keys:
 
 @pytest.mark.ci
 class TestSshAuthkeyFingerprints:
-
     @pytest.mark.user_data(USER_DATA_SSH_AUTHKEY_DISABLE)
     def test_ssh_authkey_fingerprints_disable(self, client):
         cloudinit_output = client.read_from_file("/var/log/cloud-init.log")
         assert (
             "Skipping module named ssh-authkey-fingerprints, "
-            "logging of SSH fingerprints disabled") in cloudinit_output
+            "logging of SSH fingerprints disabled" in cloudinit_output
+        )
 
     # retry decorator here because it can take some time to be reflected
     # in syslog
@@ -47,7 +46,7 @@ class TestSshAuthkeyFingerprints:
     def test_ssh_authkey_fingerprints_enable(self, client):
         syslog_output = client.read_from_file("/var/log/syslog")
 
-        assert re.search(r'256 SHA256:.*(ECDSA)', syslog_output) is not None
-        assert re.search(r'256 SHA256:.*(ED25519)', syslog_output) is not None
-        assert re.search(r'1024 SHA256:.*(DSA)', syslog_output) is None
-        assert re.search(r'2048 SHA256:.*(RSA)', syslog_output) is None
+        assert re.search(r"256 SHA256:.*(ECDSA)", syslog_output) is not None
+        assert re.search(r"256 SHA256:.*(ED25519)", syslog_output) is not None
+        assert re.search(r"1024 SHA256:.*(DSA)", syslog_output) is None
+        assert re.search(r"2048 SHA256:.*(RSA)", syslog_output) is None
diff --git a/tests/integration_tests/modules/test_ssh_generate.py b/tests/integration_tests/modules/test_ssh_generate.py
index 60c36982..1dd0adf1 100644
--- a/tests/integration_tests/modules/test_ssh_generate.py
+++ b/tests/integration_tests/modules/test_ssh_generate.py
@@ -10,7 +10,6 @@ keys were created.
 
 import pytest
 
-
 USER_DATA = """\
 #cloud-config
 ssh_genkeytypes:
@@ -23,28 +22,27 @@ authkey_hash: sha512
 @pytest.mark.ci
 @pytest.mark.user_data(USER_DATA)
 class TestSshKeysGenerate:
-
     @pytest.mark.parametrize(
-        "ssh_key_path", (
+        "ssh_key_path",
+        (
             "/etc/ssh/ssh_host_dsa_key.pub",
             "/etc/ssh/ssh_host_dsa_key",
             "/etc/ssh/ssh_host_rsa_key.pub",
             "/etc/ssh/ssh_host_rsa_key",
-        )
+        ),
     )
     def test_ssh_keys_not_generated(self, ssh_key_path, class_client):
-        out = class_client.execute(
-            "test -e {}".format(ssh_key_path)
-        )
+        out = class_client.execute("test -e {}".format(ssh_key_path))
         assert out.failed
 
     @pytest.mark.parametrize(
-        "ssh_key_path", (
+        "ssh_key_path",
+        (
             "/etc/ssh/ssh_host_ecdsa_key.pub",
             "/etc/ssh/ssh_host_ecdsa_key",
             "/etc/ssh/ssh_host_ed25519_key.pub",
             "/etc/ssh/ssh_host_ed25519_key",
-        )
+        ),
     )
     def test_ssh_keys_generated(self, ssh_key_path, class_client):
         out = class_client.read_from_file(ssh_key_path)
diff --git a/tests/integration_tests/modules/test_ssh_keys_provided.py b/tests/integration_tests/modules/test_ssh_keys_provided.py
index 6aae96ae..b79f18eb 100644
--- a/tests/integration_tests/modules/test_ssh_keys_provided.py
+++ b/tests/integration_tests/modules/test_ssh_keys_provided.py
@@ -9,7 +9,6 @@ system.
 
 import pytest
 
-
 USER_DATA = """\
 #cloud-config
 disable_root: false
@@ -82,44 +81,33 @@ ssh_keys:
 @pytest.mark.ci
 @pytest.mark.user_data(USER_DATA)
 class TestSshKeysProvided:
-
     @pytest.mark.parametrize(
         "config_path,expected_out",
         (
             (
                 "/etc/ssh/ssh_host_dsa_key.pub",
-                (
-                    "AAAAB3NzaC1kc3MAAACBAPkWy1zbchVIN7qTgM0/yyY8q4R"
-                    "ZS8cNM4ZpeuE5UB/Nnr6OSU/nmbO8LuM"
-                ),
+                "AAAAB3NzaC1kc3MAAACBAPkWy1zbchVIN7qTgM0/yyY8q4R"
+                "ZS8cNM4ZpeuE5UB/Nnr6OSU/nmbO8LuM",
             ),
             (
                 "/etc/ssh/ssh_host_dsa_key",
-                (
-                    "MIIBuwIBAAKBgQD5Fstc23IVSDe6k4DNP8smPKuEWUvHDTOGaXr"
-                    "hOVAfzZ6+jklP"
-                ),
+                "MIIBuwIBAAKBgQD5Fstc23IVSDe6k4DNP8smPKuEWUvHDTOGaXr"
+                "hOVAfzZ6+jklP",
             ),
             (
                 "/etc/ssh/ssh_host_rsa_key.pub",
-                (
-                    "AAAAB3NzaC1yc2EAAAADAQABAAABAQC0/Ho+o3eJISydO2JvIgT"
-                    "LnZOtrxPl+fSvJfKDjoOLY0HB2eOjy2s2/2N6d9X9SGZ4"
-                ),
+                "AAAAB3NzaC1yc2EAAAADAQABAAABAQC0/Ho+o3eJISydO2JvIgT"
+                "LnZOtrxPl+fSvJfKDjoOLY0HB2eOjy2s2/2N6d9X9SGZ4",
             ),
             (
                 "/etc/ssh/ssh_host_rsa_key",
-                (
-                    "4DOkqNiUGl80Zp1RgZNohHUXlJMtAbrIlAVEk+mTmg7vjfyp2un"
-                    "RQvLZpMRdywBm"
-                ),
+                "4DOkqNiUGl80Zp1RgZNohHUXlJMtAbrIlAVEk+mTmg7vjfyp2un"
+                "RQvLZpMRdywBm",
             ),
             (
                 "/etc/ssh/ssh_host_rsa_key-cert.pub",
-                (
-                    "AAAAHHNzaC1yc2EtY2VydC12MDFAb3BlbnNzaC5jb20AAAAgMpg"
-                    "BP4Phn3L8I7Vqh7lmHKcOfIokEvSEbHDw83Y3JloAAAAD"
-                ),
+                "AAAAHHNzaC1yc2EtY2VydC12MDFAb3BlbnNzaC5jb20AAAAgMpg"
+                "BP4Phn3L8I7Vqh7lmHKcOfIokEvSEbHDw83Y3JloAAAAD",
             ),
             (
                 "/etc/ssh/sshd_config",
@@ -127,33 +115,25 @@ class TestSshKeysProvided:
             ),
             (
                 "/etc/ssh/ssh_host_ecdsa_key.pub",
-                (
-                    "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAAB"
-                    "BBFsS5Tvky/IC/dXhE/afxxU"
-                ),
+                "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAAB"
+                "BBFsS5Tvky/IC/dXhE/afxxU",
             ),
             (
                 "/etc/ssh/ssh_host_ecdsa_key",
-                (
-                    "AwEHoUQDQgAEWxLlO+TL8gL91eET9p/HFQbqR1A691AkJgZk3jY"
-                    "5mpZqxgX4vcgb"
-                ),
+                "AwEHoUQDQgAEWxLlO+TL8gL91eET9p/HFQbqR1A691AkJgZk3jY"
+                "5mpZqxgX4vcgb",
             ),
             (
                 "/etc/ssh/ssh_host_ed25519_key.pub",
-                (
-                    "AAAAC3NzaC1lZDI1NTE5AAAAINudAZSu4vjZpVWzId5pXmZg1M6"
-                    "G15dqjQ2XkNVOEnb5"
-                ),
+                "AAAAC3NzaC1lZDI1NTE5AAAAINudAZSu4vjZpVWzId5pXmZg1M6"
+                "G15dqjQ2XkNVOEnb5",
             ),
             (
                 "/etc/ssh/ssh_host_ed25519_key",
-                (
-                    "XAAAAAtzc2gtZWQyNTUxOQAAACDbnQGUruL42aVVsyHeaV5mYNT"
-                    "OhteXao0Nl5DVThJ2+Q"
-                ),
+                "XAAAAAtzc2gtZWQyNTUxOQAAACDbnQGUruL42aVVsyHeaV5mYNT"
+                "OhteXao0Nl5DVThJ2+Q",
             ),
-        )
+        ),
     )
     def test_ssh_provided_keys(self, config_path, expected_out, class_client):
         out = class_client.read_from_file(config_path).strip()
diff --git a/tests/integration_tests/modules/test_ssh_keysfile.py b/tests/integration_tests/modules/test_ssh_keysfile.py
index b39454e6..8330a1ce 100644
--- a/tests/integration_tests/modules/test_ssh_keysfile.py
+++ b/tests/integration_tests/modules/test_ssh_keysfile.py
@@ -1,15 +1,16 @@
+from io import StringIO
+
 import paramiko
 import pytest
-from io import StringIO
 from paramiko.ssh_exception import SSHException
 
 from tests.integration_tests.clouds import ImageSpecification
 from tests.integration_tests.instances import IntegrationInstance
 from tests.integration_tests.util import get_test_rsa_keypair
 
-TEST_USER1_KEYS = get_test_rsa_keypair('test1')
-TEST_USER2_KEYS = get_test_rsa_keypair('test2')
-TEST_DEFAULT_KEYS = get_test_rsa_keypair('test3')
+TEST_USER1_KEYS = get_test_rsa_keypair("test1")
+TEST_USER2_KEYS = get_test_rsa_keypair("test2")
+TEST_DEFAULT_KEYS = get_test_rsa_keypair("test3")
 
 _USERDATA = """\
 #cloud-config
@@ -26,7 +27,7 @@ users:
   ssh_authorized_keys:
     - {user2}
 """.format(
-    bootcmd='{bootcmd}',
+    bootcmd="{bootcmd}",
     default=TEST_DEFAULT_KEYS.public_key,
     user1=TEST_USER1_KEYS.public_key,
     user2=TEST_USER2_KEYS.public_key,
@@ -37,9 +38,9 @@ def common_verify(client, expected_keys):
     for user, filename, keys in expected_keys:
         # Ensure key is in the key file
         contents = client.read_from_file(filename)
-        if user in ['ubuntu', 'root']:
-            lines = contents.split('\n')
-            if user == 'root':
+        if user in ["ubuntu", "root"]:
+            lines = contents.split("\n")
+            if user == "root":
                 # Our personal public key gets added by pycloudlib in
                 # addition to the default `ssh_authorized_keys`
                 assert len(lines) == 2
@@ -54,8 +55,9 @@ def common_verify(client, expected_keys):
         # Ensure we can actually connect
         ssh = paramiko.SSHClient()
         ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
-        paramiko_key = paramiko.RSAKey.from_private_key(StringIO(
-            keys.private_key))
+        paramiko_key = paramiko.RSAKey.from_private_key(
+            StringIO(keys.private_key)
+        )
 
         # Will fail with AuthenticationException if
         # we cannot connect
@@ -71,8 +73,11 @@ def common_verify(client, expected_keys):
         other_users = [u[0] for u in expected_keys if u[2] != keys]
         for other_user in other_users:
             with pytest.raises(SSHException):
-                print('trying to connect as {} with key from {}'.format(
-                    other_user, user))
+                print(
+                    "trying to connect as {} with key from {}".format(
+                        other_user, user
+                    )
+                )
                 ssh.connect(
                     client.instance.ip,
                     username=other_user,
@@ -83,37 +88,38 @@ def common_verify(client, expected_keys):
 
         # Ensure we haven't messed with any /home permissions
         # See LP: #1940233
-        home_dir = '/home/{}'.format(user)
+        home_dir = "/home/{}".format(user)
         # Home permissions aren't consistent between releases. On ubuntu
         # this can change to 750 once focal is unsupported.
         if ImageSpecification.from_os_image().release in ("bionic", "focal"):
-            home_perms = '755'
+            home_perms = "755"
         else:
-            home_perms = '750'
-        if user == 'root':
-            home_dir = '/root'
-            home_perms = '700'
-        assert '{} {}'.format(user, home_perms) == client.execute(
+            home_perms = "750"
+        if user == "root":
+            home_dir = "/root"
+            home_perms = "700"
+        assert "{} {}".format(user, home_perms) == client.execute(
             'stat -c "%U %a" {}'.format(home_dir)
         )
         if client.execute("test -d {}/.ssh".format(home_dir)).ok:
-            assert '{} 700'.format(user) == client.execute(
+            assert "{} 700".format(user) == client.execute(
                 'stat -c "%U %a" {}/.ssh'.format(home_dir)
             )
-        assert '{} 600'.format(user) == client.execute(
+        assert "{} 600".format(user) == client.execute(
             'stat -c "%U %a" {}'.format(filename)
         )
 
         # Also ensure ssh-keygen works as expected
-        client.execute('mkdir {}/.ssh'.format(home_dir))
+        client.execute("mkdir {}/.ssh".format(home_dir))
         assert client.execute(
             "ssh-keygen -b 2048 -t rsa -f {}/.ssh/id_rsa -q -N ''".format(
-                home_dir)
+                home_dir
+            )
         ).ok
-        assert client.execute('test -f {}/.ssh/id_rsa'.format(home_dir))
-        assert client.execute('test -f {}/.ssh/id_rsa.pub'.format(home_dir))
+        assert client.execute("test -f {}/.ssh/id_rsa".format(home_dir))
+        assert client.execute("test -f {}/.ssh/id_rsa.pub".format(home_dir))
 
-    assert 'root 755' == client.execute('stat -c "%U %a" /home')
+    assert "root 755" == client.execute('stat -c "%U %a" /home')
 
 
 DEFAULT_KEYS_USERDATA = _USERDATA.format(bootcmd='""')
@@ -123,75 +129,96 @@ DEFAULT_KEYS_USERDATA = _USERDATA.format(bootcmd='""')
 @pytest.mark.user_data(DEFAULT_KEYS_USERDATA)
 def test_authorized_keys_default(client: IntegrationInstance):
     expected_keys = [
-        ('test_user1', '/home/test_user1/.ssh/authorized_keys',
-         TEST_USER1_KEYS),
-        ('test_user2', '/home/test_user2/.ssh/authorized_keys',
-         TEST_USER2_KEYS),
-        ('ubuntu', '/home/ubuntu/.ssh/authorized_keys',
-         TEST_DEFAULT_KEYS),
-        ('root', '/root/.ssh/authorized_keys', TEST_DEFAULT_KEYS),
+        (
+            "test_user1",
+            "/home/test_user1/.ssh/authorized_keys",
+            TEST_USER1_KEYS,
+        ),
+        (
+            "test_user2",
+            "/home/test_user2/.ssh/authorized_keys",
+            TEST_USER2_KEYS,
+        ),
+        ("ubuntu", "/home/ubuntu/.ssh/authorized_keys", TEST_DEFAULT_KEYS),
+        ("root", "/root/.ssh/authorized_keys", TEST_DEFAULT_KEYS),
     ]
     common_verify(client, expected_keys)
 
 
-AUTHORIZED_KEYS2_USERDATA = _USERDATA.format(bootcmd=(
-    "sed -i 's;#AuthorizedKeysFile.*;AuthorizedKeysFile "
-    "/etc/ssh/authorized_keys %h/.ssh/authorized_keys2;' "
-    "/etc/ssh/sshd_config"))
+AUTHORIZED_KEYS2_USERDATA = _USERDATA.format(
+    bootcmd=(
+        "sed -i 's;#AuthorizedKeysFile.*;AuthorizedKeysFile "
+        "/etc/ssh/authorized_keys %h/.ssh/authorized_keys2;' "
+        "/etc/ssh/sshd_config"
+    )
+)
 
 
 @pytest.mark.ubuntu
 @pytest.mark.user_data(AUTHORIZED_KEYS2_USERDATA)
 def test_authorized_keys2(client: IntegrationInstance):
     expected_keys = [
-        ('test_user1', '/home/test_user1/.ssh/authorized_keys2',
-         TEST_USER1_KEYS),
-        ('test_user2', '/home/test_user2/.ssh/authorized_keys2',
-         TEST_USER2_KEYS),
-        ('ubuntu', '/home/ubuntu/.ssh/authorized_keys2',
-         TEST_DEFAULT_KEYS),
-        ('root', '/root/.ssh/authorized_keys2', TEST_DEFAULT_KEYS),
+        (
+            "test_user1",
+            "/home/test_user1/.ssh/authorized_keys2",
+            TEST_USER1_KEYS,
+        ),
+        (
+            "test_user2",
+            "/home/test_user2/.ssh/authorized_keys2",
+            TEST_USER2_KEYS,
+        ),
+        ("ubuntu", "/home/ubuntu/.ssh/authorized_keys2", TEST_DEFAULT_KEYS),
+        ("root", "/root/.ssh/authorized_keys2", TEST_DEFAULT_KEYS),
     ]
     common_verify(client, expected_keys)
 
 
-NESTED_KEYS_USERDATA = _USERDATA.format(bootcmd=(
-    "sed -i 's;#AuthorizedKeysFile.*;AuthorizedKeysFile "
-    "/etc/ssh/authorized_keys %h/foo/bar/ssh/keys;' "
-    "/etc/ssh/sshd_config"))
+NESTED_KEYS_USERDATA = _USERDATA.format(
+    bootcmd=(
+        "sed -i 's;#AuthorizedKeysFile.*;AuthorizedKeysFile "
+        "/etc/ssh/authorized_keys %h/foo/bar/ssh/keys;' "
+        "/etc/ssh/sshd_config"
+    )
+)
 
 
 @pytest.mark.ubuntu
 @pytest.mark.user_data(NESTED_KEYS_USERDATA)
 def test_nested_keys(client: IntegrationInstance):
     expected_keys = [
-        ('test_user1', '/home/test_user1/foo/bar/ssh/keys',
-         TEST_USER1_KEYS),
-        ('test_user2', '/home/test_user2/foo/bar/ssh/keys',
-         TEST_USER2_KEYS),
-        ('ubuntu', '/home/ubuntu/foo/bar/ssh/keys',
-         TEST_DEFAULT_KEYS),
-        ('root', '/root/foo/bar/ssh/keys', TEST_DEFAULT_KEYS),
+        ("test_user1", "/home/test_user1/foo/bar/ssh/keys", TEST_USER1_KEYS),
+        ("test_user2", "/home/test_user2/foo/bar/ssh/keys", TEST_USER2_KEYS),
+        ("ubuntu", "/home/ubuntu/foo/bar/ssh/keys", TEST_DEFAULT_KEYS),
+        ("root", "/root/foo/bar/ssh/keys", TEST_DEFAULT_KEYS),
     ]
     common_verify(client, expected_keys)
 
 
-EXTERNAL_KEYS_USERDATA = _USERDATA.format(bootcmd=(
-    "sed -i 's;#AuthorizedKeysFile.*;AuthorizedKeysFile "
-    "/etc/ssh/authorized_keys /etc/ssh/authorized_keys/%u/keys;' "
-    "/etc/ssh/sshd_config"))
+EXTERNAL_KEYS_USERDATA = _USERDATA.format(
+    bootcmd=(
+        "sed -i 's;#AuthorizedKeysFile.*;AuthorizedKeysFile "
+        "/etc/ssh/authorized_keys /etc/ssh/authorized_keys/%u/keys;' "
+        "/etc/ssh/sshd_config"
+    )
+)
 
 
 @pytest.mark.ubuntu
 @pytest.mark.user_data(EXTERNAL_KEYS_USERDATA)
 def test_external_keys(client: IntegrationInstance):
     expected_keys = [
-        ('test_user1', '/etc/ssh/authorized_keys/test_user1/keys',
-         TEST_USER1_KEYS),
-        ('test_user2', '/etc/ssh/authorized_keys/test_user2/keys',
-         TEST_USER2_KEYS),
-        ('ubuntu', '/etc/ssh/authorized_keys/ubuntu/keys',
-         TEST_DEFAULT_KEYS),
-        ('root', '/etc/ssh/authorized_keys/root/keys', TEST_DEFAULT_KEYS),
+        (
+            "test_user1",
+            "/etc/ssh/authorized_keys/test_user1/keys",
+            TEST_USER1_KEYS,
+        ),
+        (
+            "test_user2",
+            "/etc/ssh/authorized_keys/test_user2/keys",
+            TEST_USER2_KEYS,
+        ),
+        ("ubuntu", "/etc/ssh/authorized_keys/ubuntu/keys", TEST_DEFAULT_KEYS),
+        ("root", "/etc/ssh/authorized_keys/root/keys", TEST_DEFAULT_KEYS),
     ]
     common_verify(client, expected_keys)
diff --git a/tests/integration_tests/modules/test_user_events.py b/tests/integration_tests/modules/test_user_events.py
index fffa0746..e4a4241f 100644
--- a/tests/integration_tests/modules/test_user_events.py
+++ b/tests/integration_tests/modules/test_user_events.py
@@ -3,8 +3,9 @@
 This is currently limited to applying network config on BOOT events.
 """
 
-import pytest
 import re
+
+import pytest
 import yaml
 
 from tests.integration_tests.instances import IntegrationInstance
@@ -13,16 +14,16 @@ from tests.integration_tests.instances import IntegrationInstance
 def _add_dummy_bridge_to_netplan(client: IntegrationInstance):
     # Update netplan configuration to ensure it doesn't change on reboot
     netplan = yaml.safe_load(
-        client.execute('cat /etc/netplan/50-cloud-init.yaml')
+        client.execute("cat /etc/netplan/50-cloud-init.yaml")
     )
     # Just a dummy bridge to do nothing
     try:
-        netplan['network']['bridges']['dummy0'] = {'dhcp4': False}
+        netplan["network"]["bridges"]["dummy0"] = {"dhcp4": False}
     except KeyError:
-        netplan['network']['bridges'] = {'dummy0': {'dhcp4': False}}
+        netplan["network"]["bridges"] = {"dummy0": {"dhcp4": False}}
 
     dumped_netplan = yaml.dump(netplan)
-    client.write_to_file('/etc/netplan/50-cloud-init.yaml', dumped_netplan)
+    client.write_to_file("/etc/netplan/50-cloud-init.yaml", dumped_netplan)
 
 
 @pytest.mark.lxd_container
@@ -32,19 +33,19 @@ def _add_dummy_bridge_to_netplan(client: IntegrationInstance):
 @pytest.mark.oci
 @pytest.mark.openstack
 def test_boot_event_disabled_by_default(client: IntegrationInstance):
-    log = client.read_from_file('/var/log/cloud-init.log')
-    if 'network config is disabled' in log:
+    log = client.read_from_file("/var/log/cloud-init.log")
+    if "network config is disabled" in log:
         pytest.skip("network config disabled. Test doesn't apply")
-    assert 'Applying network configuration' in log
-    assert 'dummy0' not in client.execute('ls /sys/class/net')
+    assert "Applying network configuration" in log
+    assert "dummy0" not in client.execute("ls /sys/class/net")
 
     _add_dummy_bridge_to_netplan(client)
-    client.execute('rm /var/log/cloud-init.log')
+    client.execute("rm /var/log/cloud-init.log")
 
     client.restart()
-    log2 = client.read_from_file('/var/log/cloud-init.log')
+    log2 = client.read_from_file("/var/log/cloud-init.log")
 
-    if 'cache invalid in datasource' in log2:
+    if "cache invalid in datasource" in log2:
         # Invalid cache will get cleared, meaning we'll create a new
         # "instance" and apply networking config, so events aren't
         # really relevant here
@@ -53,8 +54,9 @@ def test_boot_event_disabled_by_default(client: IntegrationInstance):
     # We attempt to apply network config twice on every boot.
     # Ensure neither time works.
     assert 2 == len(
-        re.findall(r"Event Denied: scopes=\['network'\] EventType=boot[^-]",
-                   log2)
+        re.findall(
+            r"Event Denied: scopes=\['network'\] EventType=boot[^-]", log2
+        )
     )
     assert 2 == log2.count(
         "Event Denied: scopes=['network'] EventType=boot-legacy"
@@ -64,30 +66,30 @@ def test_boot_event_disabled_by_default(client: IntegrationInstance):
         " nor datasource network update allowed"
     )
 
-    assert 'dummy0' in client.execute('ls /sys/class/net')
+    assert "dummy0" in client.execute("ls /sys/class/net")
 
 
 def _test_network_config_applied_on_reboot(client: IntegrationInstance):
-    log = client.read_from_file('/var/log/cloud-init.log')
-    if 'network config is disabled' in log:
+    log = client.read_from_file("/var/log/cloud-init.log")
+    if "network config is disabled" in log:
         pytest.skip("network config disabled. Test doesn't apply")
-    assert 'Applying network configuration' in log
-    assert 'dummy0' not in client.execute('ls /sys/class/net')
+    assert "Applying network configuration" in log
+    assert "dummy0" not in client.execute("ls /sys/class/net")
 
     _add_dummy_bridge_to_netplan(client)
     client.execute('echo "" > /var/log/cloud-init.log')
     client.restart()
 
-    log = client.read_from_file('/var/log/cloud-init.log')
-    if 'cache invalid in datasource' in log:
+    log = client.read_from_file("/var/log/cloud-init.log")
+    if "cache invalid in datasource" in log:
         # Invalid cache will get cleared, meaning we'll create a new
         # "instance" and apply networking config, so events aren't
         # really relevant here
         pytest.skip("Test only valid for existing instances")
 
-    assert 'Event Allowed: scope=network EventType=boot' in log
-    assert 'Applying network configuration' in log
-    assert 'dummy0' not in client.execute('ls /sys/class/net')
+    assert "Event Allowed: scope=network EventType=boot" in log
+    assert "Applying network configuration" in log
+    assert "dummy0" not in client.execute("ls /sys/class/net")
 
 
 @pytest.mark.azure
diff --git a/tests/integration_tests/modules/test_users_groups.py b/tests/integration_tests/modules/test_users_groups.py
index bcb17b7f..3d1358ce 100644
--- a/tests/integration_tests/modules/test_users_groups.py
+++ b/tests/integration_tests/modules/test_users_groups.py
@@ -11,7 +11,6 @@ import pytest
 from tests.integration_tests.clouds import ImageSpecification
 from tests.integration_tests.instances import IntegrationInstance
 
-
 USER_DATA = """\
 #cloud-config
 # Add groups to the system
@@ -84,7 +83,9 @@ class TestUsersGroups:
         assert re.search(regex, result.stdout) is not None, (
             "'getent {}' resulted in '{}', "
             "but expected to match regex {}".format(
-                ' '.join(getent_args), result.stdout, regex))
+                " ".join(getent_args), result.stdout, regex
+            )
+        )
 
     def test_user_root_in_secret(self, class_client):
         """Test root user is in 'secret' group."""
@@ -105,19 +106,21 @@ def test_sudoers_includedir(client: IntegrationInstance):
     https://github.com/canonical/cloud-init/pull/783
     """
     if ImageSpecification.from_os_image().release in [
-        'xenial', 'bionic', 'focal'
+        "xenial",
+        "bionic",
+        "focal",
     ]:
         raise pytest.skip(
-            'Test requires version of sudo installed on groovy and later'
+            "Test requires version of sudo installed on groovy and later"
         )
     client.execute("sed -i 's/#include/@include/g' /etc/sudoers")
 
-    sudoers = client.read_from_file('/etc/sudoers')
-    if '@includedir /etc/sudoers.d' not in sudoers:
+    sudoers = client.read_from_file("/etc/sudoers")
+    if "@includedir /etc/sudoers.d" not in sudoers:
         client.execute("echo '@includedir /etc/sudoers.d' >> /etc/sudoers")
     client.instance.clean()
     client.restart()
-    sudoers = client.read_from_file('/etc/sudoers')
+    sudoers = client.read_from_file("/etc/sudoers")
 
-    assert '#includedir' not in sudoers
-    assert sudoers.count('includedir /etc/sudoers.d') == 1
+    assert "#includedir" not in sudoers
+    assert sudoers.count("includedir /etc/sudoers.d") == 1
diff --git a/tests/integration_tests/modules/test_version_change.py b/tests/integration_tests/modules/test_version_change.py
index f28079d4..3168cd60 100644
--- a/tests/integration_tests/modules/test_version_change.py
+++ b/tests/integration_tests/modules/test_version_change.py
@@ -5,39 +5,40 @@ import pytest
 from tests.integration_tests.instances import IntegrationInstance
 from tests.integration_tests.util import ASSETS_DIR, verify_clean_log
 
-
-PICKLE_PATH = Path('/var/lib/cloud/instance/obj.pkl')
-TEST_PICKLE = ASSETS_DIR / 'test_version_change.pkl'
+PICKLE_PATH = Path("/var/lib/cloud/instance/obj.pkl")
+TEST_PICKLE = ASSETS_DIR / "test_version_change.pkl"
 
 
 def _assert_no_pickle_problems(log):
-    assert 'Failed loading pickled blob' not in log
+    assert "Failed loading pickled blob" not in log
     verify_clean_log(log)
 
 
 def test_reboot_without_version_change(client: IntegrationInstance):
-    log = client.read_from_file('/var/log/cloud-init.log')
-    assert 'Python version change detected' not in log
-    assert 'Cache compatibility status is currently unknown.' not in log
+    log = client.read_from_file("/var/log/cloud-init.log")
+    assert "Python version change detected" not in log
+    assert "Cache compatibility status is currently unknown." not in log
     _assert_no_pickle_problems(log)
 
     client.restart()
-    log = client.read_from_file('/var/log/cloud-init.log')
-    assert 'Python version change detected' not in log
-    assert 'Could not determine Python version used to write cache' not in log
+    log = client.read_from_file("/var/log/cloud-init.log")
+    assert "Python version change detected" not in log
+    assert "Could not determine Python version used to write cache" not in log
     _assert_no_pickle_problems(log)
 
     # Now ensure that loading a bad pickle gives us problems
     client.push_file(TEST_PICKLE, PICKLE_PATH)
     client.restart()
-    log = client.read_from_file('/var/log/cloud-init.log')
+    log = client.read_from_file("/var/log/cloud-init.log")
 
     # no cache found is an "expected" upgrade error, and
     # "Failed" means we're unable to load the pickle
-    assert any([
-        'Failed loading pickled blob from {}'.format(PICKLE_PATH) in log,
-        'no cache found' in log
-    ])
+    assert any(
+        [
+            "Failed loading pickled blob from {}".format(PICKLE_PATH) in log,
+            "no cache found" in log,
+        ]
+    )
 
 
 @pytest.mark.ec2
@@ -54,8 +55,8 @@ def test_cache_purged_on_version_change(client: IntegrationInstance):
     client.push_file(TEST_PICKLE, PICKLE_PATH)
     client.execute("echo '1.0' > /var/lib/cloud/data/python-version")
     client.restart()
-    log = client.read_from_file('/var/log/cloud-init.log')
-    assert 'Python version change detected. Purging cache' in log
+    log = client.read_from_file("/var/log/cloud-init.log")
+    assert "Python version change detected. Purging cache" in log
     _assert_no_pickle_problems(log)
 
 
@@ -65,11 +66,11 @@ def test_log_message_on_missing_version_file(client: IntegrationInstance):
     client.execute("rm /var/lib/cloud/data/python-version")
     client.execute("rm /var/log/cloud-init.log")
     client.restart()
-    log = client.read_from_file('/var/log/cloud-init.log')
-    if 'no cache found' not in log:
+    log = client.read_from_file("/var/log/cloud-init.log")
+    if "no cache found" not in log:
         # We don't expect the python version file to exist if we have no
         # pre-existing cache
         assert (
-            'Writing python-version file. '
-            'Cache compatibility status is currently unknown.'
-        ) in log
+            "Writing python-version file. "
+            "Cache compatibility status is currently unknown." in log
+        )
diff --git a/tests/integration_tests/modules/test_write_files.py b/tests/integration_tests/modules/test_write_files.py
index 1d532fac..1eb7e945 100644
--- a/tests/integration_tests/modules/test_write_files.py
+++ b/tests/integration_tests/modules/test_write_files.py
@@ -7,8 +7,8 @@ and then checks if those files were created during boot.
 ``tests/cloud_tests/testcases/modules/write_files.yaml``.)"""
 
 import base64
-import pytest
 
+import pytest
 
 ASCII_TEXT = "ASCII text"
 B64_CONTENT = base64.b64encode(ASCII_TEXT.encode("utf-8"))
@@ -50,25 +50,30 @@ write_files:
     defer: true
     owner: 'myuser'
     permissions: '0644'
-""".format(B64_CONTENT.decode("ascii"))
+""".format(
+    B64_CONTENT.decode("ascii")
+)
 
 
 @pytest.mark.ci
 @pytest.mark.user_data(USER_DATA)
 class TestWriteFiles:
-
     @pytest.mark.parametrize(
-        "cmd,expected_out", (
+        "cmd,expected_out",
+        (
             ("file /root/file_b64", ASCII_TEXT),
             ("md5sum </root/file_binary", "3801184b97bb8c6e63fa0e1eae2920d7"),
-            ("sha256sum </root/file_binary", (
+            (
+                "sha256sum </root/file_binary",
                 "2c791c4037ea5bd7e928d6a87380f8ba"
-                "7a803cd83d5e4f269e28f5090f0f2c9a"
-            )),
-            ("file /root/file_gzip",
-             "POSIX shell script, ASCII text executable"),
+                "7a803cd83d5e4f269e28f5090f0f2c9a",
+            ),
+            (
+                "file /root/file_gzip",
+                "POSIX shell script, ASCII text executable",
+            ),
             ("file /root/file_text", ASCII_TEXT),
-        )
+        ),
     )
     def test_write_files(self, cmd, expected_out, class_client):
         out = class_client.execute(cmd)
@@ -82,6 +87,7 @@ class TestWriteFiles:
         """
         out = class_client.read_from_file("/home/testuser/my-file")
         assert "echo 'hello world!'" == out
-        assert class_client.execute(
-            'stat -c "%U %a" /home/testuser/my-file'
-        ) == 'myuser 644'
+        assert (
+            class_client.execute('stat -c "%U %a" /home/testuser/my-file')
+            == "myuser 644"
+        )
diff --git a/tests/integration_tests/test_upgrade.py b/tests/integration_tests/test_upgrade.py
index 0ba4754c..e53ea998 100644
--- a/tests/integration_tests/test_upgrade.py
+++ b/tests/integration_tests/test_upgrade.py
@@ -1,14 +1,14 @@
 import json
 import logging
 import os
+
 import pytest
 
 from tests.integration_tests.clouds import ImageSpecification, IntegrationCloud
 from tests.integration_tests.conftest import get_validated_source
 from tests.integration_tests.util import verify_clean_log
 
-
-LOG = logging.getLogger('integration_testing.test_upgrade')
+LOG = logging.getLogger("integration_testing.test_upgrade")
 
 LOG_TEMPLATE = """\n\
 === `systemd-analyze` before:
@@ -46,8 +46,10 @@ def test_clean_boot_of_upgraded_package(session_cloud: IntegrationCloud):
     if not source.installs_new_version():
         pytest.skip(UNSUPPORTED_INSTALL_METHOD_MSG.format(source))
         return  # type checking doesn't understand that skip raises
-    if (ImageSpecification.from_os_image().release == 'bionic' and
-            session_cloud.settings.PLATFORM == 'lxd_vm'):
+    if (
+        ImageSpecification.from_os_image().release == "bionic"
+        and session_cloud.settings.PLATFORM == "lxd_vm"
+    ):
         # The issues that we see on Bionic VMs don't appear anywhere
         # else, including when calling KVM directly. It likely has to
         # do with the extra lxd-agent setup happening on bionic.
@@ -57,32 +59,34 @@ def test_clean_boot_of_upgraded_package(session_cloud: IntegrationCloud):
         return
 
     launch_kwargs = {
-        'image_id': session_cloud.released_image_id,
+        "image_id": session_cloud.released_image_id,
     }
 
     with session_cloud.launch(
-        launch_kwargs=launch_kwargs, user_data=USER_DATA,
+        launch_kwargs=launch_kwargs,
+        user_data=USER_DATA,
     ) as instance:
         # get pre values
-        pre_hostname = instance.execute('hostname')
-        pre_cloud_id = instance.execute('cloud-id')
-        pre_result = instance.execute('cat /run/cloud-init/result.json')
-        pre_network = instance.execute('cat /etc/netplan/50-cloud-init.yaml')
-        pre_systemd_analyze = instance.execute('systemd-analyze')
-        pre_systemd_blame = instance.execute('systemd-analyze blame')
-        pre_cloud_analyze = instance.execute('cloud-init analyze show')
-        pre_cloud_blame = instance.execute('cloud-init analyze blame')
+        pre_hostname = instance.execute("hostname")
+        pre_cloud_id = instance.execute("cloud-id")
+        pre_result = instance.execute("cat /run/cloud-init/result.json")
+        pre_network = instance.execute("cat /etc/netplan/50-cloud-init.yaml")
+        pre_systemd_analyze = instance.execute("systemd-analyze")
+        pre_systemd_blame = instance.execute("systemd-analyze blame")
+        pre_cloud_analyze = instance.execute("cloud-init analyze show")
+        pre_cloud_blame = instance.execute("cloud-init analyze blame")
 
         # Ensure no issues pre-upgrade
-        log = instance.read_from_file('/var/log/cloud-init.log')
-        assert not json.loads(pre_result)['v1']['errors']
+        log = instance.read_from_file("/var/log/cloud-init.log")
+        assert not json.loads(pre_result)["v1"]["errors"]
 
         try:
             verify_clean_log(log)
         except AssertionError:
             LOG.warning(
-                'There were errors/warnings/tracebacks pre-upgrade. '
-                'Any failures may be due to pre-upgrade problem')
+                "There were errors/warnings/tracebacks pre-upgrade. "
+                "Any failures may be due to pre-upgrade problem"
+            )
 
         # Upgrade
         instance.install_new_cloud_init(source, take_snapshot=False)
@@ -91,27 +95,27 @@ def test_clean_boot_of_upgraded_package(session_cloud: IntegrationCloud):
         # have broken across re-constitution of a cached datasource. Some
         # platforms invalidate their datasource cache on reboot, so we run
         # it here to ensure we get a dirty run.
-        assert instance.execute('cloud-init init').ok
+        assert instance.execute("cloud-init init").ok
 
         # Reboot
-        instance.execute('hostname something-else')
+        instance.execute("hostname something-else")
         instance.restart()
-        assert instance.execute('cloud-init status --wait --long').ok
+        assert instance.execute("cloud-init status --wait --long").ok
 
         # get post values
-        post_hostname = instance.execute('hostname')
-        post_cloud_id = instance.execute('cloud-id')
-        post_result = instance.execute('cat /run/cloud-init/result.json')
-        post_network = instance.execute('cat /etc/netplan/50-cloud-init.yaml')
-        post_systemd_analyze = instance.execute('systemd-analyze')
-        post_systemd_blame = instance.execute('systemd-analyze blame')
-        post_cloud_analyze = instance.execute('cloud-init analyze show')
-        post_cloud_blame = instance.execute('cloud-init analyze blame')
+        post_hostname = instance.execute("hostname")
+        post_cloud_id = instance.execute("cloud-id")
+        post_result = instance.execute("cat /run/cloud-init/result.json")
+        post_network = instance.execute("cat /etc/netplan/50-cloud-init.yaml")
+        post_systemd_analyze = instance.execute("systemd-analyze")
+        post_systemd_blame = instance.execute("systemd-analyze blame")
+        post_cloud_analyze = instance.execute("cloud-init analyze show")
+        post_cloud_blame = instance.execute("cloud-init analyze blame")
 
         # Ensure no issues post-upgrade
-        assert not json.loads(pre_result)['v1']['errors']
+        assert not json.loads(pre_result)["v1"]["errors"]
 
-        log = instance.read_from_file('/var/log/cloud-init.log')
+        log = instance.read_from_file("/var/log/cloud-init.log")
         verify_clean_log(log)
 
         # Ensure important things stayed the same
@@ -120,36 +124,46 @@ def test_clean_boot_of_upgraded_package(session_cloud: IntegrationCloud):
         try:
             assert pre_result == post_result
         except AssertionError:
-            if instance.settings.PLATFORM == 'azure':
+            if instance.settings.PLATFORM == "azure":
                 pre_json = json.loads(pre_result)
                 post_json = json.loads(post_result)
-                assert pre_json['v1']['datasource'].startswith(
-                    'DataSourceAzure')
-                assert post_json['v1']['datasource'].startswith(
-                    'DataSourceAzure')
+                assert pre_json["v1"]["datasource"].startswith(
+                    "DataSourceAzure"
+                )
+                assert post_json["v1"]["datasource"].startswith(
+                    "DataSourceAzure"
+                )
         assert pre_network == post_network
 
         # Calculate and log all the boot numbers
         pre_analyze_totals = [
-            x for x in pre_cloud_analyze.splitlines()
-            if x.startswith('Finished stage') or x.startswith('Total Time')
+            x
+            for x in pre_cloud_analyze.splitlines()
+            if x.startswith("Finished stage") or x.startswith("Total Time")
         ]
         post_analyze_totals = [
-            x for x in post_cloud_analyze.splitlines()
-            if x.startswith('Finished stage') or x.startswith('Total Time')
+            x
+            for x in post_cloud_analyze.splitlines()
+            if x.startswith("Finished stage") or x.startswith("Total Time")
         ]
 
         # pylint: disable=logging-format-interpolation
-        LOG.info(LOG_TEMPLATE.format(
-            pre_systemd_analyze=pre_systemd_analyze,
-            post_systemd_analyze=post_systemd_analyze,
-            pre_systemd_blame='\n'.join(pre_systemd_blame.splitlines()[:10]),
-            post_systemd_blame='\n'.join(post_systemd_blame.splitlines()[:10]),
-            pre_analyze_totals='\n'.join(pre_analyze_totals),
-            post_analyze_totals='\n'.join(post_analyze_totals),
-            pre_cloud_blame='\n'.join(pre_cloud_blame.splitlines()[:10]),
-            post_cloud_blame='\n'.join(post_cloud_blame.splitlines()[:10]),
-        ))
+        LOG.info(
+            LOG_TEMPLATE.format(
+                pre_systemd_analyze=pre_systemd_analyze,
+                post_systemd_analyze=post_systemd_analyze,
+                pre_systemd_blame="\n".join(
+                    pre_systemd_blame.splitlines()[:10]
+                ),
+                post_systemd_blame="\n".join(
+                    post_systemd_blame.splitlines()[:10]
+                ),
+                pre_analyze_totals="\n".join(pre_analyze_totals),
+                post_analyze_totals="\n".join(post_analyze_totals),
+                pre_cloud_blame="\n".join(pre_cloud_blame.splitlines()[:10]),
+                post_cloud_blame="\n".join(post_cloud_blame.splitlines()[:10]),
+            )
+        )
 
 
 @pytest.mark.ci
@@ -157,18 +171,18 @@ def test_clean_boot_of_upgraded_package(session_cloud: IntegrationCloud):
 def test_subsequent_boot_of_upgraded_package(session_cloud: IntegrationCloud):
     source = get_validated_source(session_cloud)
     if not source.installs_new_version():
-        if os.environ.get('TRAVIS'):
+        if os.environ.get("TRAVIS"):
             # If this isn't running on CI, we should know
             pytest.fail(UNSUPPORTED_INSTALL_METHOD_MSG.format(source))
         else:
             pytest.skip(UNSUPPORTED_INSTALL_METHOD_MSG.format(source))
         return  # type checking doesn't understand that skip raises
 
-    launch_kwargs = {'image_id': session_cloud.released_image_id}
+    launch_kwargs = {"image_id": session_cloud.released_image_id}
 
     with session_cloud.launch(launch_kwargs=launch_kwargs) as instance:
         instance.install_new_cloud_init(
             source, take_snapshot=False, clean=False
         )
         instance.restart()
-        assert instance.execute('cloud-init status --wait --long').ok
+        assert instance.execute("cloud-init status --wait --long").ok
diff --git a/tests/integration_tests/util.py b/tests/integration_tests/util.py
index e40d80fe..31fe69c0 100644
--- a/tests/integration_tests/util.py
+++ b/tests/integration_tests/util.py
@@ -3,16 +3,15 @@ import logging
 import multiprocessing
 import os
 import time
-from contextlib import contextmanager
 from collections import namedtuple
+from contextlib import contextmanager
 from pathlib import Path
 
+log = logging.getLogger("integration_testing")
+key_pair = namedtuple("key_pair", "public_key private_key")
 
-log = logging.getLogger('integration_testing')
-key_pair = namedtuple('key_pair', 'public_key private_key')
-
-ASSETS_DIR = Path('tests/integration_tests/assets')
-KEY_PATH = ASSETS_DIR / 'keys'
+ASSETS_DIR = Path("tests/integration_tests/assets")
+KEY_PATH = ASSETS_DIR / "keys"
 
 
 def verify_ordered_items_in_text(to_verify: list, text: str):
@@ -30,26 +29,27 @@ def verify_ordered_items_in_text(to_verify: list, text: str):
 
 def verify_clean_log(log):
     """Assert no unexpected tracebacks or warnings in logs"""
-    warning_count = log.count('WARN')
+    warning_count = log.count("WARN")
     expected_warnings = 0
-    traceback_count = log.count('Traceback')
+    traceback_count = log.count("Traceback")
     expected_tracebacks = 0
 
     warning_texts = [
         # Consistently on all Azure launches:
         # azure.py[WARNING]: No lease found; using default endpoint
-        'No lease found; using default endpoint'
+        "No lease found; using default endpoint"
     ]
     traceback_texts = []
-    if 'oracle' in log:
+    if "oracle" in log:
         # LP: #1842752
-        lease_exists_text = 'Stderr: RTNETLINK answers: File exists'
+        lease_exists_text = "Stderr: RTNETLINK answers: File exists"
         warning_texts.append(lease_exists_text)
         traceback_texts.append(lease_exists_text)
         # LP: #1833446
         fetch_error_text = (
-            'UrlError: 404 Client Error: Not Found for url: '
-            'http://169.254.169.254/latest/meta-data/')
+            "UrlError: 404 Client Error: Not Found for url: "
+            "http://169.254.169.254/latest/meta-data/"
+        )
         warning_texts.append(fetch_error_text)
         traceback_texts.append(fetch_error_text)
         # Oracle has a file in /etc/cloud/cloud.cfg.d that contains
@@ -59,7 +59,7 @@ def verify_clean_log(log):
         #   ssh_redirect_user: true
         # This can trigger a warning about opc having no public key
         warning_texts.append(
-            'Unable to disable SSH logins for opc given ssh_redirect_user'
+            "Unable to disable SSH logins for opc given ssh_redirect_user"
         )
 
     for warning_text in warning_texts:
@@ -82,7 +82,7 @@ def emit_dots_on_travis():
     It should be wrapped selectively around operations that are known to take a
     long time.
     """
-    if os.environ.get('TRAVIS') != "true":
+    if os.environ.get("TRAVIS") != "true":
         # If we aren't on Travis, don't do anything.
         yield
         return
@@ -100,9 +100,9 @@ def emit_dots_on_travis():
         dot_process.terminate()
 
 
-def get_test_rsa_keypair(key_name: str = 'test1') -> key_pair:
-    private_key_path = KEY_PATH / 'id_rsa.{}'.format(key_name)
-    public_key_path = KEY_PATH / 'id_rsa.{}.pub'.format(key_name)
+def get_test_rsa_keypair(key_name: str = "test1") -> key_pair:
+    private_key_path = KEY_PATH / "id_rsa.{}".format(key_name)
+    public_key_path = KEY_PATH / "id_rsa.{}.pub".format(key_name)
     with public_key_path.open() as public_file:
         public_key = public_file.read()
     with private_key_path.open() as private_file:
@@ -121,6 +121,7 @@ def retry(*, tries: int = 30, delay: int = 1):
       def try_something_that_may_not_be_ready():
           ...
     """
+
     def _retry(func):
         @functools.wraps(func)
         def wrapper(*args, **kwargs):
@@ -135,5 +136,7 @@ def retry(*, tries: int = 30, delay: int = 1):
             else:
                 if last_error:
                     raise last_error
+
         return wrapper
+
     return _retry
diff --git a/tests/unittests/__init__.py b/tests/unittests/__init__.py
index d89ed443..657cb399 100644
--- a/tests/unittests/__init__.py
+++ b/tests/unittests/__init__.py
@@ -4,6 +4,7 @@ try:
     # For test cases, avoid the following UserWarning to stderr:
     # You don't have the C version of NameMapper installed ...
     from Cheetah import NameMapper as _nm
+
     _nm.C_VERSION = True
 except ImportError:
     pass
diff --git a/tests/unittests/analyze/test_boot.py b/tests/unittests/analyze/test_boot.py
index fd878b44..68db69ec 100644
--- a/tests/unittests/analyze/test_boot.py
+++ b/tests/unittests/analyze/test_boot.py
@@ -1,89 +1,93 @@
 import os
-from cloudinit.analyze.__main__ import (analyze_boot, get_parser)
+
+from cloudinit.analyze.__main__ import analyze_boot, get_parser
+from cloudinit.analyze.show import (
+    CONTAINER_CODE,
+    FAIL_CODE,
+    SystemctlReader,
+    dist_check_timestamp,
+)
 from tests.unittests.helpers import CiTestCase, mock
-from cloudinit.analyze.show import dist_check_timestamp, SystemctlReader, \
-    FAIL_CODE, CONTAINER_CODE
 
 err_code = (FAIL_CODE, -1, -1, -1)
 
 
 class TestDistroChecker(CiTestCase):
-
     def test_blank_distro(self):
         self.assertEqual(err_code, dist_check_timestamp())
 
-    @mock.patch('cloudinit.util.is_FreeBSD', return_value=True)
+    @mock.patch("cloudinit.util.is_FreeBSD", return_value=True)
     def test_freebsd_gentoo_cant_find(self, m_is_FreeBSD):
         self.assertEqual(err_code, dist_check_timestamp())
 
-    @mock.patch('cloudinit.subp.subp', return_value=(0, 1))
+    @mock.patch("cloudinit.subp.subp", return_value=(0, 1))
     def test_subp_fails(self, m_subp):
         self.assertEqual(err_code, dist_check_timestamp())
 
 
 class TestSystemCtlReader(CiTestCase):
-
     def test_systemctl_invalid_property(self):
-        reader = SystemctlReader('dummyProperty')
+        reader = SystemctlReader("dummyProperty")
         with self.assertRaises(RuntimeError):
             reader.parse_epoch_as_float()
 
     def test_systemctl_invalid_parameter(self):
-        reader = SystemctlReader('dummyProperty', 'dummyParameter')
+        reader = SystemctlReader("dummyProperty", "dummyParameter")
         with self.assertRaises(RuntimeError):
             reader.parse_epoch_as_float()
 
-    @mock.patch('cloudinit.subp.subp', return_value=('U=1000000', None))
+    @mock.patch("cloudinit.subp.subp", return_value=("U=1000000", None))
     def test_systemctl_works_correctly_threshold(self, m_subp):
-        reader = SystemctlReader('dummyProperty', 'dummyParameter')
+        reader = SystemctlReader("dummyProperty", "dummyParameter")
         self.assertEqual(1.0, reader.parse_epoch_as_float())
         thresh = 1.0 - reader.parse_epoch_as_float()
         self.assertTrue(thresh < 1e-6)
         self.assertTrue(thresh > (-1 * 1e-6))
 
-    @mock.patch('cloudinit.subp.subp', return_value=('U=0', None))
+    @mock.patch("cloudinit.subp.subp", return_value=("U=0", None))
     def test_systemctl_succeed_zero(self, m_subp):
-        reader = SystemctlReader('dummyProperty', 'dummyParameter')
+        reader = SystemctlReader("dummyProperty", "dummyParameter")
         self.assertEqual(0.0, reader.parse_epoch_as_float())
 
-    @mock.patch('cloudinit.subp.subp', return_value=('U=1', None))
+    @mock.patch("cloudinit.subp.subp", return_value=("U=1", None))
     def test_systemctl_succeed_distinct(self, m_subp):
-        reader = SystemctlReader('dummyProperty', 'dummyParameter')
+        reader = SystemctlReader("dummyProperty", "dummyParameter")
         val1 = reader.parse_epoch_as_float()
-        m_subp.return_value = ('U=2', None)
-        reader2 = SystemctlReader('dummyProperty', 'dummyParameter')
+        m_subp.return_value = ("U=2", None)
+        reader2 = SystemctlReader("dummyProperty", "dummyParameter")
         val2 = reader2.parse_epoch_as_float()
         self.assertNotEqual(val1, val2)
 
-    @mock.patch('cloudinit.subp.subp', return_value=('100', None))
+    @mock.patch("cloudinit.subp.subp", return_value=("100", None))
     def test_systemctl_epoch_not_splittable(self, m_subp):
-        reader = SystemctlReader('dummyProperty', 'dummyParameter')
+        reader = SystemctlReader("dummyProperty", "dummyParameter")
         with self.assertRaises(IndexError):
             reader.parse_epoch_as_float()
 
-    @mock.patch('cloudinit.subp.subp', return_value=('U=foobar', None))
+    @mock.patch("cloudinit.subp.subp", return_value=("U=foobar", None))
     def test_systemctl_cannot_convert_epoch_to_float(self, m_subp):
-        reader = SystemctlReader('dummyProperty', 'dummyParameter')
+        reader = SystemctlReader("dummyProperty", "dummyParameter")
         with self.assertRaises(ValueError):
             reader.parse_epoch_as_float()
 
 
 class TestAnalyzeBoot(CiTestCase):
-
     def set_up_dummy_file_ci(self, path, log_path):
-        infh = open(path, 'w+')
-        infh.write('2019-07-08 17:40:49,601 - util.py[DEBUG]: Cloud-init v. '
-                   '19.1-1-gbaa47854-0ubuntu1~18.04.1 running \'init-local\' '
-                   'at Mon, 08 Jul 2019 17:40:49 +0000. Up 18.84 seconds.')
+        infh = open(path, "w+")
+        infh.write(
+            "2019-07-08 17:40:49,601 - util.py[DEBUG]: Cloud-init v. "
+            "19.1-1-gbaa47854-0ubuntu1~18.04.1 running 'init-local' "
+            "at Mon, 08 Jul 2019 17:40:49 +0000. Up 18.84 seconds."
+        )
         infh.close()
-        outfh = open(log_path, 'w+')
+        outfh = open(log_path, "w+")
         outfh.close()
 
     def set_up_dummy_file(self, path, log_path):
-        infh = open(path, 'w+')
-        infh.write('dummy data')
+        infh = open(path, "w+")
+        infh.write("dummy data")
         infh.close()
-        outfh = open(log_path, 'w+')
+        outfh = open(log_path, "w+")
         outfh.close()
 
     def remove_dummy_file(self, path, log_path):
@@ -92,46 +96,47 @@ class TestAnalyzeBoot(CiTestCase):
         if os.path.isfile(log_path):
             os.remove(log_path)
 
-    @mock.patch('cloudinit.analyze.show.dist_check_timestamp',
-                return_value=err_code)
+    @mock.patch(
+        "cloudinit.analyze.show.dist_check_timestamp", return_value=err_code
+    )
     def test_boot_invalid_distro(self, m_dist_check_timestamp):
 
         path = os.path.dirname(os.path.abspath(__file__))
-        log_path = path + '/boot-test.log'
-        path += '/dummy.log'
+        log_path = path + "/boot-test.log"
+        path += "/dummy.log"
         self.set_up_dummy_file(path, log_path)
 
         parser = get_parser()
-        args = parser.parse_args(args=['boot', '-i', path, '-o',
-                                       log_path])
-        name_default = ''
+        args = parser.parse_args(args=["boot", "-i", path, "-o", log_path])
+        name_default = ""
         analyze_boot(name_default, args)
         # now args have been tested, go into outfile and make sure error
         # message is in the outfile
-        outfh = open(args.outfile, 'r')
+        outfh = open(args.outfile, "r")
         data = outfh.read()
-        err_string = 'Your Linux distro or container does not support this ' \
-                     'functionality.\nYou must be running a Kernel ' \
-                     'Telemetry supported distro.\nPlease check ' \
-                     'https://cloudinit.readthedocs.io/en/latest/topics' \
-                     '/analyze.html for more information on supported ' \
-                     'distros.\n'
+        err_string = (
+            "Your Linux distro or container does not support this "
+            "functionality.\nYou must be running a Kernel "
+            "Telemetry supported distro.\nPlease check "
+            "https://cloudinit.readthedocs.io/en/latest/topics"
+            "/analyze.html for more information on supported "
+            "distros.\n"
+        )
 
         self.remove_dummy_file(path, log_path)
         self.assertEqual(err_string, data)
 
     @mock.patch("cloudinit.util.is_container", return_value=True)
-    @mock.patch('cloudinit.subp.subp', return_value=('U=1000000', None))
+    @mock.patch("cloudinit.subp.subp", return_value=("U=1000000", None))
     def test_container_no_ci_log_line(self, m_is_container, m_subp):
         path = os.path.dirname(os.path.abspath(__file__))
-        log_path = path + '/boot-test.log'
-        path += '/dummy.log'
+        log_path = path + "/boot-test.log"
+        path += "/dummy.log"
         self.set_up_dummy_file(path, log_path)
 
         parser = get_parser()
-        args = parser.parse_args(args=['boot', '-i', path, '-o',
-                                       log_path])
-        name_default = ''
+        args = parser.parse_args(args=["boot", "-i", path, "-o", log_path])
+        name_default = ""
 
         finish_code = analyze_boot(name_default, args)
 
@@ -139,22 +144,30 @@ class TestAnalyzeBoot(CiTestCase):
         self.assertEqual(FAIL_CODE, finish_code)
 
     @mock.patch("cloudinit.util.is_container", return_value=True)
-    @mock.patch('cloudinit.subp.subp', return_value=('U=1000000', None))
-    @mock.patch('cloudinit.analyze.__main__._get_events', return_value=[{
-        'name': 'init-local', 'description': 'starting search', 'timestamp':
-        100000}])
-    @mock.patch('cloudinit.analyze.show.dist_check_timestamp',
-                return_value=(CONTAINER_CODE, 1, 1, 1))
+    @mock.patch("cloudinit.subp.subp", return_value=("U=1000000", None))
+    @mock.patch(
+        "cloudinit.analyze.__main__._get_events",
+        return_value=[
+            {
+                "name": "init-local",
+                "description": "starting search",
+                "timestamp": 100000,
+            }
+        ],
+    )
+    @mock.patch(
+        "cloudinit.analyze.show.dist_check_timestamp",
+        return_value=(CONTAINER_CODE, 1, 1, 1),
+    )
     def test_container_ci_log_line(self, m_is_container, m_subp, m_get, m_g):
         path = os.path.dirname(os.path.abspath(__file__))
-        log_path = path + '/boot-test.log'
-        path += '/dummy.log'
+        log_path = path + "/boot-test.log"
+        path += "/dummy.log"
         self.set_up_dummy_file_ci(path, log_path)
 
         parser = get_parser()
-        args = parser.parse_args(args=['boot', '-i', path, '-o',
-                                       log_path])
-        name_default = ''
+        args = parser.parse_args(args=["boot", "-i", path, "-o", log_path])
+        name_default = ""
         finish_code = analyze_boot(name_default, args)
 
         self.remove_dummy_file(path, log_path)
diff --git a/tests/unittests/analyze/test_dump.py b/tests/unittests/analyze/test_dump.py
index e3683bbf..56bbf97f 100644
--- a/tests/unittests/analyze/test_dump.py
+++ b/tests/unittests/analyze/test_dump.py
@@ -4,50 +4,54 @@ from datetime import datetime
 from textwrap import dedent
 
 from cloudinit.analyze.dump import (
-    dump_events, parse_ci_logline, parse_timestamp)
-from cloudinit.util import write_file
+    dump_events,
+    parse_ci_logline,
+    parse_timestamp,
+)
 from cloudinit.subp import which
+from cloudinit.util import write_file
 from tests.unittests.helpers import CiTestCase, mock, skipIf
 
 
 class TestParseTimestamp(CiTestCase):
-
     def test_parse_timestamp_handles_cloud_init_default_format(self):
         """Logs with cloud-init detailed formats will be properly parsed."""
-        trusty_fmt = '%Y-%m-%d %H:%M:%S,%f'
-        trusty_stamp = '2016-09-12 14:39:20,839'
+        trusty_fmt = "%Y-%m-%d %H:%M:%S,%f"
+        trusty_stamp = "2016-09-12 14:39:20,839"
         dt = datetime.strptime(trusty_stamp, trusty_fmt)
         self.assertEqual(
-            float(dt.strftime('%s.%f')), parse_timestamp(trusty_stamp))
+            float(dt.strftime("%s.%f")), parse_timestamp(trusty_stamp)
+        )
 
     def test_parse_timestamp_handles_syslog_adding_year(self):
         """Syslog timestamps lack a year. Add year and properly parse."""
-        syslog_fmt = '%b %d %H:%M:%S %Y'
-        syslog_stamp = 'Aug 08 15:12:51'
+        syslog_fmt = "%b %d %H:%M:%S %Y"
+        syslog_stamp = "Aug 08 15:12:51"
 
         # convert stamp ourselves by adding the missing year value
         year = datetime.now().year
         dt = datetime.strptime(syslog_stamp + " " + str(year), syslog_fmt)
         self.assertEqual(
-            float(dt.strftime('%s.%f')),
-            parse_timestamp(syslog_stamp))
+            float(dt.strftime("%s.%f")), parse_timestamp(syslog_stamp)
+        )
 
     def test_parse_timestamp_handles_journalctl_format_adding_year(self):
         """Journalctl precise timestamps lack a year. Add year and parse."""
-        journal_fmt = '%b %d %H:%M:%S.%f %Y'
-        journal_stamp = 'Aug 08 17:15:50.606811'
+        journal_fmt = "%b %d %H:%M:%S.%f %Y"
+        journal_stamp = "Aug 08 17:15:50.606811"
 
         # convert stamp ourselves by adding the missing year value
         year = datetime.now().year
         dt = datetime.strptime(journal_stamp + " " + str(year), journal_fmt)
         self.assertEqual(
-            float(dt.strftime('%s.%f')), parse_timestamp(journal_stamp))
+            float(dt.strftime("%s.%f")), parse_timestamp(journal_stamp)
+        )
 
     @skipIf(not which("date"), "'date' command not available.")
     def test_parse_unexpected_timestamp_format_with_date_command(self):
         """Dump sends unexpected timestamp formats to date for processing."""
-        new_fmt = '%H:%M %m/%d %Y'
-        new_stamp = '17:15 08/08'
+        new_fmt = "%H:%M %m/%d %Y"
+        new_stamp = "17:15 08/08"
         # convert stamp ourselves by adding the missing year value
         year = datetime.now().year
         dt = datetime.strptime(new_stamp + " " + str(year), new_fmt)
@@ -55,15 +59,20 @@ class TestParseTimestamp(CiTestCase):
         # use date(1)
         with self.allow_subp(["date"]):
             self.assertEqual(
-                float(dt.strftime('%s.%f')), parse_timestamp(new_stamp))
+                float(dt.strftime("%s.%f")), parse_timestamp(new_stamp)
+            )
 
 
 class TestParseCILogLine(CiTestCase):
-
     def test_parse_logline_returns_none_without_separators(self):
         """When no separators are found, parse_ci_logline returns None."""
         expected_parse_ignores = [
-            '', '-', 'adsf-asdf', '2017-05-22 18:02:01,088', 'CLOUDINIT']
+            "",
+            "-",
+            "adsf-asdf",
+            "2017-05-22 18:02:01,088",
+            "CLOUDINIT",
+        ]
         for parse_ignores in expected_parse_ignores:
             self.assertIsNone(parse_ci_logline(parse_ignores))
 
@@ -72,79 +81,95 @@ class TestParseCILogLine(CiTestCase):
         line = (
             "2017-08-08 20:05:07,147 - util.py[DEBUG]: Cloud-init v. 0.7.9"
             " running 'init-local' at Tue, 08 Aug 2017 20:05:07 +0000. Up"
-            " 6.26 seconds.")
+            " 6.26 seconds."
+        )
         dt = datetime.strptime(
-            '2017-08-08 20:05:07,147', '%Y-%m-%d %H:%M:%S,%f')
-        timestamp = float(dt.strftime('%s.%f'))
+            "2017-08-08 20:05:07,147", "%Y-%m-%d %H:%M:%S,%f"
+        )
+        timestamp = float(dt.strftime("%s.%f"))
         expected = {
-            'description': 'starting search for local datasources',
-            'event_type': 'start',
-            'name': 'init-local',
-            'origin': 'cloudinit',
-            'timestamp': timestamp}
+            "description": "starting search for local datasources",
+            "event_type": "start",
+            "name": "init-local",
+            "origin": "cloudinit",
+            "timestamp": timestamp,
+        }
         self.assertEqual(expected, parse_ci_logline(line))
 
     def test_parse_logline_returns_event_for_journalctl_logs(self):
         """parse_ci_logline returns an event parse from journalctl format."""
-        line = ("Nov 03 06:51:06.074410 x2 cloud-init[106]: [CLOUDINIT]"
-                " util.py[DEBUG]: Cloud-init v. 0.7.8 running 'init-local' at"
-                "  Thu, 03 Nov 2016 06:51:06 +0000. Up 1.0 seconds.")
+        line = (
+            "Nov 03 06:51:06.074410 x2 cloud-init[106]: [CLOUDINIT]"
+            " util.py[DEBUG]: Cloud-init v. 0.7.8 running 'init-local' at"
+            "  Thu, 03 Nov 2016 06:51:06 +0000. Up 1.0 seconds."
+        )
         year = datetime.now().year
         dt = datetime.strptime(
-            'Nov 03 06:51:06.074410 %d' % year, '%b %d %H:%M:%S.%f %Y')
-        timestamp = float(dt.strftime('%s.%f'))
+            "Nov 03 06:51:06.074410 %d" % year, "%b %d %H:%M:%S.%f %Y"
+        )
+        timestamp = float(dt.strftime("%s.%f"))
         expected = {
-            'description': 'starting search for local datasources',
-            'event_type': 'start',
-            'name': 'init-local',
-            'origin': 'cloudinit',
-            'timestamp': timestamp}
+            "description": "starting search for local datasources",
+            "event_type": "start",
+            "name": "init-local",
+            "origin": "cloudinit",
+            "timestamp": timestamp,
+        }
         self.assertEqual(expected, parse_ci_logline(line))
 
     @mock.patch("cloudinit.analyze.dump.parse_timestamp_from_date")
-    def test_parse_logline_returns_event_for_finish_events(self,
-                                                           m_parse_from_date):
+    def test_parse_logline_returns_event_for_finish_events(
+        self, m_parse_from_date
+    ):
         """parse_ci_logline returns a finish event for a parsed log line."""
-        line = ('2016-08-30 21:53:25.972325+00:00 y1 [CLOUDINIT]'
-                ' handlers.py[DEBUG]: finish: modules-final: SUCCESS: running'
-                ' modules for final')
+        line = (
+            "2016-08-30 21:53:25.972325+00:00 y1 [CLOUDINIT]"
+            " handlers.py[DEBUG]: finish: modules-final: SUCCESS: running"
+            " modules for final"
+        )
         expected = {
-            'description': 'running modules for final',
-            'event_type': 'finish',
-            'name': 'modules-final',
-            'origin': 'cloudinit',
-            'result': 'SUCCESS',
-            'timestamp': 1472594005.972}
+            "description": "running modules for final",
+            "event_type": "finish",
+            "name": "modules-final",
+            "origin": "cloudinit",
+            "result": "SUCCESS",
+            "timestamp": 1472594005.972,
+        }
         m_parse_from_date.return_value = "1472594005.972"
         self.assertEqual(expected, parse_ci_logline(line))
         m_parse_from_date.assert_has_calls(
-            [mock.call("2016-08-30 21:53:25.972325+00:00")])
+            [mock.call("2016-08-30 21:53:25.972325+00:00")]
+        )
 
     def test_parse_logline_returns_event_for_amazon_linux_2_line(self):
         line = (
             "Apr 30 19:39:11 cloud-init[2673]: handlers.py[DEBUG]: start:"
-            " init-local/check-cache: attempting to read from cache [check]")
+            " init-local/check-cache: attempting to read from cache [check]"
+        )
         # Generate the expected value using `datetime`, so that TZ
         # determination is consistent with the code under test.
         timestamp_dt = datetime.strptime(
             "Apr 30 19:39:11", "%b %d %H:%M:%S"
         ).replace(year=datetime.now().year)
         expected = {
-            'description': 'attempting to read from cache [check]',
-            'event_type': 'start',
-            'name': 'init-local/check-cache',
-            'origin': 'cloudinit',
-            'timestamp': timestamp_dt.timestamp()}
+            "description": "attempting to read from cache [check]",
+            "event_type": "start",
+            "name": "init-local/check-cache",
+            "origin": "cloudinit",
+            "timestamp": timestamp_dt.timestamp(),
+        }
         self.assertEqual(expected, parse_ci_logline(line))
 
 
-SAMPLE_LOGS = dedent("""\
+SAMPLE_LOGS = dedent(
+    """\
 Nov 03 06:51:06.074410 x2 cloud-init[106]: [CLOUDINIT] util.py[DEBUG]:\
  Cloud-init v. 0.7.8 running 'init-local' at Thu, 03 Nov 2016\
  06:51:06 +0000. Up 1.0 seconds.
 2016-08-30 21:53:25.972325+00:00 y1 [CLOUDINIT] handlers.py[DEBUG]: finish:\
  modules-final: SUCCESS: running modules for final
-""")
+"""
+)
 
 
 class TestDumpEvents(CiTestCase):
@@ -158,51 +183,65 @@ class TestDumpEvents(CiTestCase):
         expected_data = SAMPLE_LOGS.splitlines()
         self.assertEqual(
             [mock.call("2016-08-30 21:53:25.972325+00:00")],
-            m_parse_from_date.call_args_list)
+            m_parse_from_date.call_args_list,
+        )
         self.assertEqual(expected_data, data)
         year = datetime.now().year
         dt1 = datetime.strptime(
-            'Nov 03 06:51:06.074410 %d' % year, '%b %d %H:%M:%S.%f %Y')
-        timestamp1 = float(dt1.strftime('%s.%f'))
-        expected_events = [{
-            'description': 'starting search for local datasources',
-            'event_type': 'start',
-            'name': 'init-local',
-            'origin': 'cloudinit',
-            'timestamp': timestamp1}, {
-            'description': 'running modules for final',
-            'event_type': 'finish',
-            'name': 'modules-final',
-            'origin': 'cloudinit',
-            'result': 'SUCCESS',
-            'timestamp': 1472594005.972}]
+            "Nov 03 06:51:06.074410 %d" % year, "%b %d %H:%M:%S.%f %Y"
+        )
+        timestamp1 = float(dt1.strftime("%s.%f"))
+        expected_events = [
+            {
+                "description": "starting search for local datasources",
+                "event_type": "start",
+                "name": "init-local",
+                "origin": "cloudinit",
+                "timestamp": timestamp1,
+            },
+            {
+                "description": "running modules for final",
+                "event_type": "finish",
+                "name": "modules-final",
+                "origin": "cloudinit",
+                "result": "SUCCESS",
+                "timestamp": 1472594005.972,
+            },
+        ]
         self.assertEqual(expected_events, events)
 
     @mock.patch("cloudinit.analyze.dump.parse_timestamp_from_date")
     def test_dump_events_with_cisource(self, m_parse_from_date):
         """Cisource file is read and parsed into a tuple of events and data."""
-        tmpfile = self.tmp_path('logfile')
+        tmpfile = self.tmp_path("logfile")
         write_file(tmpfile, SAMPLE_LOGS)
         m_parse_from_date.return_value = 1472594005.972
 
         events, data = dump_events(cisource=open(tmpfile))
         year = datetime.now().year
         dt1 = datetime.strptime(
-            'Nov 03 06:51:06.074410 %d' % year, '%b %d %H:%M:%S.%f %Y')
-        timestamp1 = float(dt1.strftime('%s.%f'))
-        expected_events = [{
-            'description': 'starting search for local datasources',
-            'event_type': 'start',
-            'name': 'init-local',
-            'origin': 'cloudinit',
-            'timestamp': timestamp1}, {
-            'description': 'running modules for final',
-            'event_type': 'finish',
-            'name': 'modules-final',
-            'origin': 'cloudinit',
-            'result': 'SUCCESS',
-            'timestamp': 1472594005.972}]
+            "Nov 03 06:51:06.074410 %d" % year, "%b %d %H:%M:%S.%f %Y"
+        )
+        timestamp1 = float(dt1.strftime("%s.%f"))
+        expected_events = [
+            {
+                "description": "starting search for local datasources",
+                "event_type": "start",
+                "name": "init-local",
+                "origin": "cloudinit",
+                "timestamp": timestamp1,
+            },
+            {
+                "description": "running modules for final",
+                "event_type": "finish",
+                "name": "modules-final",
+                "origin": "cloudinit",
+                "result": "SUCCESS",
+                "timestamp": 1472594005.972,
+            },
+        ]
         self.assertEqual(expected_events, events)
         self.assertEqual(SAMPLE_LOGS.splitlines(), [d.strip() for d in data])
         m_parse_from_date.assert_has_calls(
-            [mock.call("2016-08-30 21:53:25.972325+00:00")])
+            [mock.call("2016-08-30 21:53:25.972325+00:00")]
+        )
diff --git a/tests/unittests/cmd/devel/test_hotplug_hook.py b/tests/unittests/cmd/devel/test_hotplug_hook.py
index e1c64e2f..842e8dfd 100644
--- a/tests/unittests/cmd/devel/test_hotplug_hook.py
+++ b/tests/unittests/cmd/devel/test_hotplug_hook.py
@@ -1,8 +1,9 @@
-import pytest
 from collections import namedtuple
 from unittest import mock
 from unittest.mock import call
 
+import pytest
+
 from cloudinit.cmd.devel.hotplug_hook import handle_hotplug
 from cloudinit.distros import Distro
 from cloudinit.event import EventType
@@ -11,9 +12,8 @@ from cloudinit.net.network_state import NetworkState
 from cloudinit.sources import DataSource
 from cloudinit.stages import Init
 
-
-hotplug_args = namedtuple('hotplug_args', 'udevaction, subsystem, devpath')
-FAKE_MAC = '11:22:33:44:55:66'
+hotplug_args = namedtuple("hotplug_args", "udevaction, subsystem, devpath")
+FAKE_MAC = "11:22:33:44:55:66"
 
 
 @pytest.yield_fixture
@@ -26,28 +26,28 @@ def mocks():
     m_init.fetch.return_value = m_datasource
 
     read_sys_net = mock.patch(
-        'cloudinit.cmd.devel.hotplug_hook.read_sys_net_safe',
-        return_value=FAKE_MAC
+        "cloudinit.cmd.devel.hotplug_hook.read_sys_net_safe",
+        return_value=FAKE_MAC,
     )
 
     update_event_enabled = mock.patch(
-        'cloudinit.stages.update_event_enabled',
+        "cloudinit.stages.update_event_enabled",
         return_value=True,
     )
 
     m_network_state = mock.MagicMock(spec=NetworkState)
     parse_net = mock.patch(
-        'cloudinit.cmd.devel.hotplug_hook.parse_net_config_data',
-        return_value=m_network_state
+        "cloudinit.cmd.devel.hotplug_hook.parse_net_config_data",
+        return_value=m_network_state,
     )
 
     m_activator = mock.MagicMock(spec=NetworkActivator)
     select_activator = mock.patch(
-        'cloudinit.cmd.devel.hotplug_hook.activators.select_activator',
-        return_value=m_activator
+        "cloudinit.cmd.devel.hotplug_hook.activators.select_activator",
+        return_value=m_activator,
     )
 
-    sleep = mock.patch('time.sleep')
+    sleep = mock.patch("time.sleep")
 
     read_sys_net.start()
     update_event_enabled.start()
@@ -55,7 +55,7 @@ def mocks():
     select_activator.start()
     m_sleep = sleep.start()
 
-    yield namedtuple('mocks', 'm_init m_network_state m_activator m_sleep')(
+    yield namedtuple("mocks", "m_init m_network_state m_activator m_sleep")(
         m_init=m_init,
         m_network_state=m_network_state,
         m_activator=m_activator,
@@ -72,42 +72,43 @@ def mocks():
 class TestUnsupportedActions:
     def test_unsupported_subsystem(self, mocks):
         with pytest.raises(
-            Exception,
-            match='cannot handle events for subsystem: not_real'
+            Exception, match="cannot handle events for subsystem: not_real"
         ):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                subsystem='not_real',
-                udevaction='add'
+                devpath="/dev/fake",
+                subsystem="not_real",
+                udevaction="add",
             )
 
     def test_unsupported_udevaction(self, mocks):
-        with pytest.raises(ValueError, match='Unknown action: not_real'):
+        with pytest.raises(ValueError, match="Unknown action: not_real"):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                udevaction='not_real',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="not_real",
+                subsystem="net",
             )
 
 
 class TestHotplug:
     def test_succcessful_add(self, mocks):
         init = mocks.m_init
-        mocks.m_network_state.iter_interfaces.return_value = [{
-            'mac_address': FAKE_MAC,
-        }]
+        mocks.m_network_state.iter_interfaces.return_value = [
+            {
+                "mac_address": FAKE_MAC,
+            }
+        ]
         handle_hotplug(
             hotplug_init=init,
-            devpath='/dev/fake',
-            udevaction='add',
-            subsystem='net'
+            devpath="/dev/fake",
+            udevaction="add",
+            subsystem="net",
+        )
+        init.datasource.update_metadata_if_supported.assert_called_once_with(
+            [EventType.HOTPLUG]
         )
-        init.datasource.update_metadata_if_supported.assert_called_once_with([
-            EventType.HOTPLUG
-        ])
-        mocks.m_activator.bring_up_interface.assert_called_once_with('fake')
+        mocks.m_activator.bring_up_interface.assert_called_once_with("fake")
         mocks.m_activator.bring_down_interface.assert_not_called()
         init._write_to_cache.assert_called_once_with()
 
@@ -116,113 +117,120 @@ class TestHotplug:
         mocks.m_network_state.iter_interfaces.return_value = [{}]
         handle_hotplug(
             hotplug_init=init,
-            devpath='/dev/fake',
-            udevaction='remove',
-            subsystem='net'
+            devpath="/dev/fake",
+            udevaction="remove",
+            subsystem="net",
         )
-        init.datasource.update_metadata_if_supported.assert_called_once_with([
-            EventType.HOTPLUG
-        ])
-        mocks.m_activator.bring_down_interface.assert_called_once_with('fake')
+        init.datasource.update_metadata_if_supported.assert_called_once_with(
+            [EventType.HOTPLUG]
+        )
+        mocks.m_activator.bring_down_interface.assert_called_once_with("fake")
         mocks.m_activator.bring_up_interface.assert_not_called()
         init._write_to_cache.assert_called_once_with()
 
     def test_update_event_disabled(self, mocks, caplog):
         init = mocks.m_init
         with mock.patch(
-            'cloudinit.stages.update_event_enabled',
-            return_value=False
+            "cloudinit.stages.update_event_enabled", return_value=False
         ):
             handle_hotplug(
                 hotplug_init=init,
-                devpath='/dev/fake',
-                udevaction='remove',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="remove",
+                subsystem="net",
             )
-        assert 'hotplug not enabled for event of type' in caplog.text
+        assert "hotplug not enabled for event of type" in caplog.text
         init.datasource.update_metadata_if_supported.assert_not_called()
         mocks.m_activator.bring_up_interface.assert_not_called()
         mocks.m_activator.bring_down_interface.assert_not_called()
         init._write_to_cache.assert_not_called()
 
     def test_update_metadata_failed(self, mocks):
-        mocks.m_init.datasource.update_metadata_if_supported.return_value = \
+        mocks.m_init.datasource.update_metadata_if_supported.return_value = (
             False
+        )
         with pytest.raises(
-            RuntimeError, match='Datasource .* not updated for event hotplug'
+            RuntimeError, match="Datasource .* not updated for event hotplug"
         ):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                udevaction='remove',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="remove",
+                subsystem="net",
             )
 
     def test_detect_hotplugged_device_not_detected_on_add(self, mocks):
         mocks.m_network_state.iter_interfaces.return_value = [{}]
         with pytest.raises(
             RuntimeError,
-            match='Failed to detect {} in updated metadata'.format(FAKE_MAC)
+            match="Failed to detect {} in updated metadata".format(FAKE_MAC),
         ):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                udevaction='add',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="add",
+                subsystem="net",
             )
 
     def test_detect_hotplugged_device_detected_on_remove(self, mocks):
-        mocks.m_network_state.iter_interfaces.return_value = [{
-            'mac_address': FAKE_MAC,
-        }]
+        mocks.m_network_state.iter_interfaces.return_value = [
+            {
+                "mac_address": FAKE_MAC,
+            }
+        ]
         with pytest.raises(
-            RuntimeError,
-            match='Failed to detect .* in updated metadata'
+            RuntimeError, match="Failed to detect .* in updated metadata"
         ):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                udevaction='remove',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="remove",
+                subsystem="net",
             )
 
     def test_apply_failed_on_add(self, mocks):
-        mocks.m_network_state.iter_interfaces.return_value = [{
-            'mac_address': FAKE_MAC,
-        }]
+        mocks.m_network_state.iter_interfaces.return_value = [
+            {
+                "mac_address": FAKE_MAC,
+            }
+        ]
         mocks.m_activator.bring_up_interface.return_value = False
         with pytest.raises(
-            RuntimeError, match='Failed to bring up device: /dev/fake'
+            RuntimeError, match="Failed to bring up device: /dev/fake"
         ):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                udevaction='add',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="add",
+                subsystem="net",
             )
 
     def test_apply_failed_on_remove(self, mocks):
         mocks.m_network_state.iter_interfaces.return_value = [{}]
         mocks.m_activator.bring_down_interface.return_value = False
         with pytest.raises(
-            RuntimeError, match='Failed to bring down device: /dev/fake'
+            RuntimeError, match="Failed to bring down device: /dev/fake"
         ):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                udevaction='remove',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="remove",
+                subsystem="net",
             )
 
     def test_retry(self, mocks):
         with pytest.raises(RuntimeError):
             handle_hotplug(
                 hotplug_init=mocks.m_init,
-                devpath='/dev/fake',
-                udevaction='add',
-                subsystem='net'
+                devpath="/dev/fake",
+                udevaction="add",
+                subsystem="net",
             )
         assert mocks.m_sleep.call_count == 5
         assert mocks.m_sleep.call_args_list == [
-            call(1), call(3), call(5), call(10), call(30)
+            call(1),
+            call(3),
+            call(5),
+            call(10),
+            call(30),
         ]
diff --git a/tests/unittests/cmd/devel/test_logs.py b/tests/unittests/cmd/devel/test_logs.py
index 18bdcdda..73ed3c65 100644
--- a/tests/unittests/cmd/devel/test_logs.py
+++ b/tests/unittests/cmd/devel/test_logs.py
@@ -1,167 +1,213 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from datetime import datetime
 import os
+from datetime import datetime
 from io import StringIO
 
 from cloudinit.cmd.devel import logs
 from cloudinit.sources import INSTANCE_JSON_SENSITIVE_FILE
-from tests.unittests.helpers import (
-    FilesystemMockingTestCase, mock, wrap_and_call)
 from cloudinit.subp import subp
 from cloudinit.util import ensure_dir, load_file, write_file
+from tests.unittests.helpers import (
+    FilesystemMockingTestCase,
+    mock,
+    wrap_and_call,
+)
 
 
-@mock.patch('cloudinit.cmd.devel.logs.os.getuid')
+@mock.patch("cloudinit.cmd.devel.logs.os.getuid")
 class TestCollectLogs(FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestCollectLogs, self).setUp()
         self.new_root = self.tmp_dir()
-        self.run_dir = self.tmp_path('run', self.new_root)
+        self.run_dir = self.tmp_path("run", self.new_root)
 
     def test_collect_logs_with_userdata_requires_root_user(self, m_getuid):
         """collect-logs errors when non-root user collects userdata ."""
         m_getuid.return_value = 100  # non-root
-        output_tarfile = self.tmp_path('logs.tgz')
-        with mock.patch('sys.stderr', new_callable=StringIO) as m_stderr:
+        output_tarfile = self.tmp_path("logs.tgz")
+        with mock.patch("sys.stderr", new_callable=StringIO) as m_stderr:
             self.assertEqual(
-                1, logs.collect_logs(output_tarfile, include_userdata=True))
+                1, logs.collect_logs(output_tarfile, include_userdata=True)
+            )
         self.assertEqual(
-            'To include userdata, root user is required.'
-            ' Try sudo cloud-init collect-logs\n',
-            m_stderr.getvalue())
+            "To include userdata, root user is required."
+            " Try sudo cloud-init collect-logs\n",
+            m_stderr.getvalue(),
+        )
 
     def test_collect_logs_creates_tarfile(self, m_getuid):
         """collect-logs creates a tarfile with all related cloud-init info."""
         m_getuid.return_value = 100
-        log1 = self.tmp_path('cloud-init.log', self.new_root)
-        write_file(log1, 'cloud-init-log')
-        log2 = self.tmp_path('cloud-init-output.log', self.new_root)
-        write_file(log2, 'cloud-init-output-log')
+        log1 = self.tmp_path("cloud-init.log", self.new_root)
+        write_file(log1, "cloud-init-log")
+        log2 = self.tmp_path("cloud-init-output.log", self.new_root)
+        write_file(log2, "cloud-init-output-log")
         ensure_dir(self.run_dir)
-        write_file(self.tmp_path('results.json', self.run_dir), 'results')
-        write_file(self.tmp_path(INSTANCE_JSON_SENSITIVE_FILE, self.run_dir),
-                   'sensitive')
-        output_tarfile = self.tmp_path('logs.tgz')
+        write_file(self.tmp_path("results.json", self.run_dir), "results")
+        write_file(
+            self.tmp_path(INSTANCE_JSON_SENSITIVE_FILE, self.run_dir),
+            "sensitive",
+        )
+        output_tarfile = self.tmp_path("logs.tgz")
 
-        date = datetime.utcnow().date().strftime('%Y-%m-%d')
-        date_logdir = 'cloud-init-logs-{0}'.format(date)
+        date = datetime.utcnow().date().strftime("%Y-%m-%d")
+        date_logdir = "cloud-init-logs-{0}".format(date)
 
-        version_out = '/usr/bin/cloud-init 18.2fake\n'
+        version_out = "/usr/bin/cloud-init 18.2fake\n"
         expected_subp = {
-            ('dpkg-query', '--show', "-f=${Version}\n", 'cloud-init'):
-                '0.7fake\n',
-            ('cloud-init', '--version'): version_out,
-            ('dmesg',): 'dmesg-out\n',
-            ('journalctl', '--boot=0', '-o', 'short-precise'): 'journal-out\n',
-            ('tar', 'czvf', output_tarfile, date_logdir): ''
+            (
+                "dpkg-query",
+                "--show",
+                "-f=${Version}\n",
+                "cloud-init",
+            ): "0.7fake\n",
+            ("cloud-init", "--version"): version_out,
+            ("dmesg",): "dmesg-out\n",
+            ("journalctl", "--boot=0", "-o", "short-precise"): "journal-out\n",
+            ("tar", "czvf", output_tarfile, date_logdir): "",
         }
 
         def fake_subp(cmd):
             cmd_tuple = tuple(cmd)
             if cmd_tuple not in expected_subp:
                 raise AssertionError(
-                    'Unexpected command provided to subp: {0}'.format(cmd))
-            if cmd == ['tar', 'czvf', output_tarfile, date_logdir]:
+                    "Unexpected command provided to subp: {0}".format(cmd)
+                )
+            if cmd == ["tar", "czvf", output_tarfile, date_logdir]:
                 subp(cmd)  # Pass through tar cmd so we can check output
-            return expected_subp[cmd_tuple], ''
+            return expected_subp[cmd_tuple], ""
 
         fake_stderr = mock.MagicMock()
 
         wrap_and_call(
-            'cloudinit.cmd.devel.logs',
-            {'subp': {'side_effect': fake_subp},
-             'sys.stderr': {'new': fake_stderr},
-             'CLOUDINIT_LOGS': {'new': [log1, log2]},
-             'CLOUDINIT_RUN_DIR': {'new': self.run_dir}},
-            logs.collect_logs, output_tarfile, include_userdata=False)
+            "cloudinit.cmd.devel.logs",
+            {
+                "subp": {"side_effect": fake_subp},
+                "sys.stderr": {"new": fake_stderr},
+                "CLOUDINIT_LOGS": {"new": [log1, log2]},
+                "CLOUDINIT_RUN_DIR": {"new": self.run_dir},
+            },
+            logs.collect_logs,
+            output_tarfile,
+            include_userdata=False,
+        )
         # unpack the tarfile and check file contents
-        subp(['tar', 'zxvf', output_tarfile, '-C', self.new_root])
+        subp(["tar", "zxvf", output_tarfile, "-C", self.new_root])
         out_logdir = self.tmp_path(date_logdir, self.new_root)
         self.assertFalse(
             os.path.exists(
-                os.path.join(out_logdir, 'run', 'cloud-init',
-                             INSTANCE_JSON_SENSITIVE_FILE)),
-            'Unexpected file found: %s' % INSTANCE_JSON_SENSITIVE_FILE)
+                os.path.join(
+                    out_logdir,
+                    "run",
+                    "cloud-init",
+                    INSTANCE_JSON_SENSITIVE_FILE,
+                )
+            ),
+            "Unexpected file found: %s" % INSTANCE_JSON_SENSITIVE_FILE,
+        )
+        self.assertEqual(
+            "0.7fake\n", load_file(os.path.join(out_logdir, "dpkg-version"))
+        )
         self.assertEqual(
-            '0.7fake\n',
-            load_file(os.path.join(out_logdir, 'dpkg-version')))
-        self.assertEqual(version_out,
-                         load_file(os.path.join(out_logdir, 'version')))
+            version_out, load_file(os.path.join(out_logdir, "version"))
+        )
         self.assertEqual(
-            'cloud-init-log',
-            load_file(os.path.join(out_logdir, 'cloud-init.log')))
+            "cloud-init-log",
+            load_file(os.path.join(out_logdir, "cloud-init.log")),
+        )
         self.assertEqual(
-            'cloud-init-output-log',
-            load_file(os.path.join(out_logdir, 'cloud-init-output.log')))
+            "cloud-init-output-log",
+            load_file(os.path.join(out_logdir, "cloud-init-output.log")),
+        )
         self.assertEqual(
-            'dmesg-out\n',
-            load_file(os.path.join(out_logdir, 'dmesg.txt')))
+            "dmesg-out\n", load_file(os.path.join(out_logdir, "dmesg.txt"))
+        )
         self.assertEqual(
-            'journal-out\n',
-            load_file(os.path.join(out_logdir, 'journal.txt')))
+            "journal-out\n", load_file(os.path.join(out_logdir, "journal.txt"))
+        )
         self.assertEqual(
-            'results',
+            "results",
             load_file(
-                os.path.join(out_logdir, 'run', 'cloud-init', 'results.json')))
-        fake_stderr.write.assert_any_call('Wrote %s\n' % output_tarfile)
+                os.path.join(out_logdir, "run", "cloud-init", "results.json")
+            ),
+        )
+        fake_stderr.write.assert_any_call("Wrote %s\n" % output_tarfile)
 
     def test_collect_logs_includes_optional_userdata(self, m_getuid):
         """collect-logs include userdata when --include-userdata is set."""
         m_getuid.return_value = 0
-        log1 = self.tmp_path('cloud-init.log', self.new_root)
-        write_file(log1, 'cloud-init-log')
-        log2 = self.tmp_path('cloud-init-output.log', self.new_root)
-        write_file(log2, 'cloud-init-output-log')
-        userdata = self.tmp_path('user-data.txt', self.new_root)
-        write_file(userdata, 'user-data')
+        log1 = self.tmp_path("cloud-init.log", self.new_root)
+        write_file(log1, "cloud-init-log")
+        log2 = self.tmp_path("cloud-init-output.log", self.new_root)
+        write_file(log2, "cloud-init-output-log")
+        userdata = self.tmp_path("user-data.txt", self.new_root)
+        write_file(userdata, "user-data")
         ensure_dir(self.run_dir)
-        write_file(self.tmp_path('results.json', self.run_dir), 'results')
-        write_file(self.tmp_path(INSTANCE_JSON_SENSITIVE_FILE, self.run_dir),
-                   'sensitive')
-        output_tarfile = self.tmp_path('logs.tgz')
+        write_file(self.tmp_path("results.json", self.run_dir), "results")
+        write_file(
+            self.tmp_path(INSTANCE_JSON_SENSITIVE_FILE, self.run_dir),
+            "sensitive",
+        )
+        output_tarfile = self.tmp_path("logs.tgz")
 
-        date = datetime.utcnow().date().strftime('%Y-%m-%d')
-        date_logdir = 'cloud-init-logs-{0}'.format(date)
+        date = datetime.utcnow().date().strftime("%Y-%m-%d")
+        date_logdir = "cloud-init-logs-{0}".format(date)
 
-        version_out = '/usr/bin/cloud-init 18.2fake\n'
+        version_out = "/usr/bin/cloud-init 18.2fake\n"
         expected_subp = {
-            ('dpkg-query', '--show', "-f=${Version}\n", 'cloud-init'):
-                '0.7fake',
-            ('cloud-init', '--version'): version_out,
-            ('dmesg',): 'dmesg-out\n',
-            ('journalctl', '--boot=0', '-o', 'short-precise'): 'journal-out\n',
-            ('tar', 'czvf', output_tarfile, date_logdir): ''
+            (
+                "dpkg-query",
+                "--show",
+                "-f=${Version}\n",
+                "cloud-init",
+            ): "0.7fake",
+            ("cloud-init", "--version"): version_out,
+            ("dmesg",): "dmesg-out\n",
+            ("journalctl", "--boot=0", "-o", "short-precise"): "journal-out\n",
+            ("tar", "czvf", output_tarfile, date_logdir): "",
         }
 
         def fake_subp(cmd):
             cmd_tuple = tuple(cmd)
             if cmd_tuple not in expected_subp:
                 raise AssertionError(
-                    'Unexpected command provided to subp: {0}'.format(cmd))
-            if cmd == ['tar', 'czvf', output_tarfile, date_logdir]:
+                    "Unexpected command provided to subp: {0}".format(cmd)
+                )
+            if cmd == ["tar", "czvf", output_tarfile, date_logdir]:
                 subp(cmd)  # Pass through tar cmd so we can check output
-            return expected_subp[cmd_tuple], ''
+            return expected_subp[cmd_tuple], ""
 
         fake_stderr = mock.MagicMock()
 
         wrap_and_call(
-            'cloudinit.cmd.devel.logs',
-            {'subp': {'side_effect': fake_subp},
-             'sys.stderr': {'new': fake_stderr},
-             'CLOUDINIT_LOGS': {'new': [log1, log2]},
-             'CLOUDINIT_RUN_DIR': {'new': self.run_dir},
-             'USER_DATA_FILE': {'new': userdata}},
-            logs.collect_logs, output_tarfile, include_userdata=True)
+            "cloudinit.cmd.devel.logs",
+            {
+                "subp": {"side_effect": fake_subp},
+                "sys.stderr": {"new": fake_stderr},
+                "CLOUDINIT_LOGS": {"new": [log1, log2]},
+                "CLOUDINIT_RUN_DIR": {"new": self.run_dir},
+                "USER_DATA_FILE": {"new": userdata},
+            },
+            logs.collect_logs,
+            output_tarfile,
+            include_userdata=True,
+        )
         # unpack the tarfile and check file contents
-        subp(['tar', 'zxvf', output_tarfile, '-C', self.new_root])
+        subp(["tar", "zxvf", output_tarfile, "-C", self.new_root])
         out_logdir = self.tmp_path(date_logdir, self.new_root)
         self.assertEqual(
-            'user-data',
-            load_file(os.path.join(out_logdir, 'user-data.txt')))
+            "user-data", load_file(os.path.join(out_logdir, "user-data.txt"))
+        )
         self.assertEqual(
-            'sensitive',
-            load_file(os.path.join(out_logdir, 'run', 'cloud-init',
-                                   INSTANCE_JSON_SENSITIVE_FILE)))
-        fake_stderr.write.assert_any_call('Wrote %s\n' % output_tarfile)
+            "sensitive",
+            load_file(
+                os.path.join(
+                    out_logdir,
+                    "run",
+                    "cloud-init",
+                    INSTANCE_JSON_SENSITIVE_FILE,
+                )
+            ),
+        )
+        fake_stderr.write.assert_any_call("Wrote %s\n" % output_tarfile)
diff --git a/tests/unittests/cmd/devel/test_render.py b/tests/unittests/cmd/devel/test_render.py
index c7ddca3d..4afc64f0 100644
--- a/tests/unittests/cmd/devel/test_render.py
+++ b/tests/unittests/cmd/devel/test_render.py
@@ -1,21 +1,21 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import os
+from collections import namedtuple
 from io import StringIO
 
-from collections import namedtuple
 from cloudinit.cmd.devel import render
 from cloudinit.helpers import Paths
 from cloudinit.sources import INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE
-from tests.unittests.helpers import CiTestCase, mock, skipUnlessJinja
 from cloudinit.util import ensure_dir, write_file
+from tests.unittests.helpers import CiTestCase, mock, skipUnlessJinja
 
 
 class TestRender(CiTestCase):
 
     with_logs = True
 
-    args = namedtuple('renderargs', 'user_data instance_data debug')
+    args = namedtuple("renderargs", "user_data instance_data debug")
 
     def setUp(self):
         super(TestRender, self).setUp()
@@ -23,122 +23,132 @@ class TestRender(CiTestCase):
 
     def test_handle_args_error_on_missing_user_data(self):
         """When user_data file path does not exist, log an error."""
-        absent_file = self.tmp_path('user-data', dir=self.tmp)
-        instance_data = self.tmp_path('instance-data', dir=self.tmp)
-        write_file(instance_data, '{}')
+        absent_file = self.tmp_path("user-data", dir=self.tmp)
+        instance_data = self.tmp_path("instance-data", dir=self.tmp)
+        write_file(instance_data, "{}")
         args = self.args(
-            user_data=absent_file, instance_data=instance_data, debug=False)
-        with mock.patch('sys.stderr', new_callable=StringIO):
-            self.assertEqual(1, render.handle_args('anyname', args))
+            user_data=absent_file, instance_data=instance_data, debug=False
+        )
+        with mock.patch("sys.stderr", new_callable=StringIO):
+            self.assertEqual(1, render.handle_args("anyname", args))
         self.assertIn(
-            'Missing user-data file: %s' % absent_file,
-            self.logs.getvalue())
+            "Missing user-data file: %s" % absent_file, self.logs.getvalue()
+        )
 
     def test_handle_args_error_on_missing_instance_data(self):
         """When instance_data file path does not exist, log an error."""
-        user_data = self.tmp_path('user-data', dir=self.tmp)
-        absent_file = self.tmp_path('instance-data', dir=self.tmp)
+        user_data = self.tmp_path("user-data", dir=self.tmp)
+        absent_file = self.tmp_path("instance-data", dir=self.tmp)
         args = self.args(
-            user_data=user_data, instance_data=absent_file, debug=False)
-        with mock.patch('sys.stderr', new_callable=StringIO):
-            self.assertEqual(1, render.handle_args('anyname', args))
+            user_data=user_data, instance_data=absent_file, debug=False
+        )
+        with mock.patch("sys.stderr", new_callable=StringIO):
+            self.assertEqual(1, render.handle_args("anyname", args))
         self.assertIn(
-            'Missing instance-data.json file: %s' % absent_file,
-            self.logs.getvalue())
+            "Missing instance-data.json file: %s" % absent_file,
+            self.logs.getvalue(),
+        )
 
     def test_handle_args_defaults_instance_data(self):
         """When no instance_data argument, default to configured run_dir."""
-        user_data = self.tmp_path('user-data', dir=self.tmp)
-        run_dir = self.tmp_path('run_dir', dir=self.tmp)
+        user_data = self.tmp_path("user-data", dir=self.tmp)
+        run_dir = self.tmp_path("run_dir", dir=self.tmp)
         ensure_dir(run_dir)
-        paths = Paths({'run_dir': run_dir})
-        self.add_patch('cloudinit.cmd.devel.render.read_cfg_paths', 'm_paths')
+        paths = Paths({"run_dir": run_dir})
+        self.add_patch("cloudinit.cmd.devel.render.read_cfg_paths", "m_paths")
         self.m_paths.return_value = paths
-        args = self.args(
-            user_data=user_data, instance_data=None, debug=False)
-        with mock.patch('sys.stderr', new_callable=StringIO):
-            self.assertEqual(1, render.handle_args('anyname', args))
+        args = self.args(user_data=user_data, instance_data=None, debug=False)
+        with mock.patch("sys.stderr", new_callable=StringIO):
+            self.assertEqual(1, render.handle_args("anyname", args))
         json_file = os.path.join(run_dir, INSTANCE_JSON_FILE)
         self.assertIn(
-            'Missing instance-data.json file: %s' % json_file,
-            self.logs.getvalue())
+            "Missing instance-data.json file: %s" % json_file,
+            self.logs.getvalue(),
+        )
 
     def test_handle_args_root_fallback_from_sensitive_instance_data(self):
         """When root user defaults to sensitive.json."""
-        user_data = self.tmp_path('user-data', dir=self.tmp)
-        run_dir = self.tmp_path('run_dir', dir=self.tmp)
+        user_data = self.tmp_path("user-data", dir=self.tmp)
+        run_dir = self.tmp_path("run_dir", dir=self.tmp)
         ensure_dir(run_dir)
-        paths = Paths({'run_dir': run_dir})
-        self.add_patch('cloudinit.cmd.devel.render.read_cfg_paths', 'm_paths')
+        paths = Paths({"run_dir": run_dir})
+        self.add_patch("cloudinit.cmd.devel.render.read_cfg_paths", "m_paths")
         self.m_paths.return_value = paths
-        args = self.args(
-            user_data=user_data, instance_data=None, debug=False)
-        with mock.patch('sys.stderr', new_callable=StringIO):
-            with mock.patch('os.getuid') as m_getuid:
+        args = self.args(user_data=user_data, instance_data=None, debug=False)
+        with mock.patch("sys.stderr", new_callable=StringIO):
+            with mock.patch("os.getuid") as m_getuid:
                 m_getuid.return_value = 0
-                self.assertEqual(1, render.handle_args('anyname', args))
+                self.assertEqual(1, render.handle_args("anyname", args))
         json_file = os.path.join(run_dir, INSTANCE_JSON_FILE)
         json_sensitive = os.path.join(run_dir, INSTANCE_JSON_SENSITIVE_FILE)
         self.assertIn(
-            'WARNING: Missing root-readable %s. Using redacted %s' % (
-                json_sensitive, json_file), self.logs.getvalue())
+            "WARNING: Missing root-readable %s. Using redacted %s"
+            % (json_sensitive, json_file),
+            self.logs.getvalue(),
+        )
         self.assertIn(
-            'ERROR: Missing instance-data.json file: %s' % json_file,
-            self.logs.getvalue())
+            "ERROR: Missing instance-data.json file: %s" % json_file,
+            self.logs.getvalue(),
+        )
 
     def test_handle_args_root_uses_sensitive_instance_data(self):
         """When root user, and no instance-data arg, use sensitive.json."""
-        user_data = self.tmp_path('user-data', dir=self.tmp)
-        write_file(user_data, '##template: jinja\nrendering: {{ my_var }}')
-        run_dir = self.tmp_path('run_dir', dir=self.tmp)
+        user_data = self.tmp_path("user-data", dir=self.tmp)
+        write_file(user_data, "##template: jinja\nrendering: {{ my_var }}")
+        run_dir = self.tmp_path("run_dir", dir=self.tmp)
         ensure_dir(run_dir)
         json_sensitive = os.path.join(run_dir, INSTANCE_JSON_SENSITIVE_FILE)
         write_file(json_sensitive, '{"my-var": "jinja worked"}')
-        paths = Paths({'run_dir': run_dir})
-        self.add_patch('cloudinit.cmd.devel.render.read_cfg_paths', 'm_paths')
+        paths = Paths({"run_dir": run_dir})
+        self.add_patch("cloudinit.cmd.devel.render.read_cfg_paths", "m_paths")
         self.m_paths.return_value = paths
-        args = self.args(
-            user_data=user_data, instance_data=None, debug=False)
-        with mock.patch('sys.stderr', new_callable=StringIO):
-            with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
-                with mock.patch('os.getuid') as m_getuid:
+        args = self.args(user_data=user_data, instance_data=None, debug=False)
+        with mock.patch("sys.stderr", new_callable=StringIO):
+            with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
+                with mock.patch("os.getuid") as m_getuid:
                     m_getuid.return_value = 0
-                    self.assertEqual(0, render.handle_args('anyname', args))
-        self.assertIn('rendering: jinja worked', m_stdout.getvalue())
+                    self.assertEqual(0, render.handle_args("anyname", args))
+        self.assertIn("rendering: jinja worked", m_stdout.getvalue())
 
     @skipUnlessJinja()
     def test_handle_args_renders_instance_data_vars_in_template(self):
         """If user_data file is a jinja template render instance-data vars."""
-        user_data = self.tmp_path('user-data', dir=self.tmp)
-        write_file(user_data, '##template: jinja\nrendering: {{ my_var }}')
-        instance_data = self.tmp_path('instance-data', dir=self.tmp)
+        user_data = self.tmp_path("user-data", dir=self.tmp)
+        write_file(user_data, "##template: jinja\nrendering: {{ my_var }}")
+        instance_data = self.tmp_path("instance-data", dir=self.tmp)
         write_file(instance_data, '{"my-var": "jinja worked"}')
         args = self.args(
-            user_data=user_data, instance_data=instance_data, debug=True)
-        with mock.patch('sys.stderr', new_callable=StringIO) as m_console_err:
-            with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
-                self.assertEqual(0, render.handle_args('anyname', args))
+            user_data=user_data, instance_data=instance_data, debug=True
+        )
+        with mock.patch("sys.stderr", new_callable=StringIO) as m_console_err:
+            with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
+                self.assertEqual(0, render.handle_args("anyname", args))
         self.assertIn(
-            'DEBUG: Converted jinja variables\n{', self.logs.getvalue())
+            "DEBUG: Converted jinja variables\n{", self.logs.getvalue()
+        )
         self.assertIn(
-            'DEBUG: Converted jinja variables\n{', m_console_err.getvalue())
-        self.assertEqual('rendering: jinja worked', m_stdout.getvalue())
+            "DEBUG: Converted jinja variables\n{", m_console_err.getvalue()
+        )
+        self.assertEqual("rendering: jinja worked", m_stdout.getvalue())
 
     @skipUnlessJinja()
     def test_handle_args_warns_and_gives_up_on_invalid_jinja_operation(self):
         """If user_data file has invalid jinja operations log warnings."""
-        user_data = self.tmp_path('user-data', dir=self.tmp)
-        write_file(user_data, '##template: jinja\nrendering: {{ my-var }}')
-        instance_data = self.tmp_path('instance-data', dir=self.tmp)
+        user_data = self.tmp_path("user-data", dir=self.tmp)
+        write_file(user_data, "##template: jinja\nrendering: {{ my-var }}")
+        instance_data = self.tmp_path("instance-data", dir=self.tmp)
         write_file(instance_data, '{"my-var": "jinja worked"}')
         args = self.args(
-            user_data=user_data, instance_data=instance_data, debug=True)
-        with mock.patch('sys.stderr', new_callable=StringIO):
-            self.assertEqual(1, render.handle_args('anyname', args))
+            user_data=user_data, instance_data=instance_data, debug=True
+        )
+        with mock.patch("sys.stderr", new_callable=StringIO):
+            self.assertEqual(1, render.handle_args("anyname", args))
         self.assertIn(
-            'WARNING: Ignoring jinja template for %s: Undefined jinja'
+            "WARNING: Ignoring jinja template for %s: Undefined jinja"
             ' variable: "my-var". Jinja tried subtraction. Perhaps you meant'
             ' "my_var"?' % user_data,
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/cmd/test_clean.py b/tests/unittests/cmd/test_clean.py
index 3bb0ee9b..7d12017e 100644
--- a/tests/unittests/cmd/test_clean.py
+++ b/tests/unittests/cmd/test_clean.py
@@ -1,29 +1,31 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.cmd import clean
-from cloudinit.util import ensure_dir, sym_link, write_file
-from tests.unittests.helpers import CiTestCase, wrap_and_call, mock
-from collections import namedtuple
 import os
+from collections import namedtuple
 from io import StringIO
 
-mypaths = namedtuple('MyPaths', 'cloud_dir')
+from cloudinit.cmd import clean
+from cloudinit.util import ensure_dir, sym_link, write_file
+from tests.unittests.helpers import CiTestCase, mock, wrap_and_call
 
+mypaths = namedtuple("MyPaths", "cloud_dir")
 
-class TestClean(CiTestCase):
 
+class TestClean(CiTestCase):
     def setUp(self):
         super(TestClean, self).setUp()
         self.new_root = self.tmp_dir()
-        self.artifact_dir = self.tmp_path('artifacts', self.new_root)
-        self.log1 = self.tmp_path('cloud-init.log', self.new_root)
-        self.log2 = self.tmp_path('cloud-init-output.log', self.new_root)
+        self.artifact_dir = self.tmp_path("artifacts", self.new_root)
+        self.log1 = self.tmp_path("cloud-init.log", self.new_root)
+        self.log2 = self.tmp_path("cloud-init-output.log", self.new_root)
 
         class FakeInit(object):
-            cfg = {'def_log_file': self.log1,
-                   'output': {'all': '|tee -a {0}'.format(self.log2)}}
+            cfg = {
+                "def_log_file": self.log1,
+                "output": {"all": "|tee -a {0}".format(self.log2)},
+            }
             # Ensure cloud_dir has a trailing slash, to match real behaviour
-            paths = mypaths(cloud_dir='{}/'.format(self.artifact_dir))
+            paths = mypaths(cloud_dir="{}/".format(self.artifact_dir))
 
             def __init__(self, ds_deps):
                 pass
@@ -35,110 +37,133 @@ class TestClean(CiTestCase):
 
     def test_remove_artifacts_removes_logs(self):
         """remove_artifacts removes logs when remove_logs is True."""
-        write_file(self.log1, 'cloud-init-log')
-        write_file(self.log2, 'cloud-init-output-log')
+        write_file(self.log1, "cloud-init-log")
+        write_file(self.log2, "cloud-init-output-log")
 
         self.assertFalse(
-            os.path.exists(self.artifact_dir), 'Unexpected artifacts dir')
+            os.path.exists(self.artifact_dir), "Unexpected artifacts dir"
+        )
         retcode = wrap_and_call(
-            'cloudinit.cmd.clean',
-            {'Init': {'side_effect': self.init_class}},
-            clean.remove_artifacts, remove_logs=True)
-        self.assertFalse(os.path.exists(self.log1), 'Unexpected file')
-        self.assertFalse(os.path.exists(self.log2), 'Unexpected file')
+            "cloudinit.cmd.clean",
+            {"Init": {"side_effect": self.init_class}},
+            clean.remove_artifacts,
+            remove_logs=True,
+        )
+        self.assertFalse(os.path.exists(self.log1), "Unexpected file")
+        self.assertFalse(os.path.exists(self.log2), "Unexpected file")
         self.assertEqual(0, retcode)
 
     def test_remove_artifacts_preserves_logs(self):
         """remove_artifacts leaves logs when remove_logs is False."""
-        write_file(self.log1, 'cloud-init-log')
-        write_file(self.log2, 'cloud-init-output-log')
+        write_file(self.log1, "cloud-init-log")
+        write_file(self.log2, "cloud-init-output-log")
 
         retcode = wrap_and_call(
-            'cloudinit.cmd.clean',
-            {'Init': {'side_effect': self.init_class}},
-            clean.remove_artifacts, remove_logs=False)
-        self.assertTrue(os.path.exists(self.log1), 'Missing expected file')
-        self.assertTrue(os.path.exists(self.log2), 'Missing expected file')
+            "cloudinit.cmd.clean",
+            {"Init": {"side_effect": self.init_class}},
+            clean.remove_artifacts,
+            remove_logs=False,
+        )
+        self.assertTrue(os.path.exists(self.log1), "Missing expected file")
+        self.assertTrue(os.path.exists(self.log2), "Missing expected file")
         self.assertEqual(0, retcode)
 
     def test_remove_artifacts_removes_unlinks_symlinks(self):
         """remove_artifacts cleans artifacts dir unlinking any symlinks."""
-        dir1 = os.path.join(self.artifact_dir, 'dir1')
+        dir1 = os.path.join(self.artifact_dir, "dir1")
         ensure_dir(dir1)
-        symlink = os.path.join(self.artifact_dir, 'mylink')
+        symlink = os.path.join(self.artifact_dir, "mylink")
         sym_link(dir1, symlink)
 
         retcode = wrap_and_call(
-            'cloudinit.cmd.clean',
-            {'Init': {'side_effect': self.init_class}},
-            clean.remove_artifacts, remove_logs=False)
+            "cloudinit.cmd.clean",
+            {"Init": {"side_effect": self.init_class}},
+            clean.remove_artifacts,
+            remove_logs=False,
+        )
         self.assertEqual(0, retcode)
         for path in (dir1, symlink):
             self.assertFalse(
-                os.path.exists(path),
-                'Unexpected {0} dir'.format(path))
+                os.path.exists(path), "Unexpected {0} dir".format(path)
+            )
 
     def test_remove_artifacts_removes_artifacts_skipping_seed(self):
         """remove_artifacts cleans artifacts dir with exception of seed dir."""
         dirs = [
             self.artifact_dir,
-            os.path.join(self.artifact_dir, 'seed'),
-            os.path.join(self.artifact_dir, 'dir1'),
-            os.path.join(self.artifact_dir, 'dir2')]
+            os.path.join(self.artifact_dir, "seed"),
+            os.path.join(self.artifact_dir, "dir1"),
+            os.path.join(self.artifact_dir, "dir2"),
+        ]
         for _dir in dirs:
             ensure_dir(_dir)
 
         retcode = wrap_and_call(
-            'cloudinit.cmd.clean',
-            {'Init': {'side_effect': self.init_class}},
-            clean.remove_artifacts, remove_logs=False)
+            "cloudinit.cmd.clean",
+            {"Init": {"side_effect": self.init_class}},
+            clean.remove_artifacts,
+            remove_logs=False,
+        )
         self.assertEqual(0, retcode)
         for expected_dir in dirs[:2]:
             self.assertTrue(
                 os.path.exists(expected_dir),
-                'Missing {0} dir'.format(expected_dir))
+                "Missing {0} dir".format(expected_dir),
+            )
         for deleted_dir in dirs[2:]:
             self.assertFalse(
                 os.path.exists(deleted_dir),
-                'Unexpected {0} dir'.format(deleted_dir))
+                "Unexpected {0} dir".format(deleted_dir),
+            )
 
     def test_remove_artifacts_removes_artifacts_removes_seed(self):
         """remove_artifacts removes seed dir when remove_seed is True."""
         dirs = [
             self.artifact_dir,
-            os.path.join(self.artifact_dir, 'seed'),
-            os.path.join(self.artifact_dir, 'dir1'),
-            os.path.join(self.artifact_dir, 'dir2')]
+            os.path.join(self.artifact_dir, "seed"),
+            os.path.join(self.artifact_dir, "dir1"),
+            os.path.join(self.artifact_dir, "dir2"),
+        ]
         for _dir in dirs:
             ensure_dir(_dir)
 
         retcode = wrap_and_call(
-            'cloudinit.cmd.clean',
-            {'Init': {'side_effect': self.init_class}},
-            clean.remove_artifacts, remove_logs=False, remove_seed=True)
+            "cloudinit.cmd.clean",
+            {"Init": {"side_effect": self.init_class}},
+            clean.remove_artifacts,
+            remove_logs=False,
+            remove_seed=True,
+        )
         self.assertEqual(0, retcode)
         self.assertTrue(
-            os.path.exists(self.artifact_dir), 'Missing artifact dir')
+            os.path.exists(self.artifact_dir), "Missing artifact dir"
+        )
         for deleted_dir in dirs[1:]:
             self.assertFalse(
                 os.path.exists(deleted_dir),
-                'Unexpected {0} dir'.format(deleted_dir))
+                "Unexpected {0} dir".format(deleted_dir),
+            )
 
     def test_remove_artifacts_returns_one_on_errors(self):
         """remove_artifacts returns non-zero on failure and prints an error."""
         ensure_dir(self.artifact_dir)
-        ensure_dir(os.path.join(self.artifact_dir, 'dir1'))
+        ensure_dir(os.path.join(self.artifact_dir, "dir1"))
 
-        with mock.patch('sys.stderr', new_callable=StringIO) as m_stderr:
+        with mock.patch("sys.stderr", new_callable=StringIO) as m_stderr:
             retcode = wrap_and_call(
-                'cloudinit.cmd.clean',
-                {'del_dir': {'side_effect': OSError('oops')},
-                 'Init': {'side_effect': self.init_class}},
-                clean.remove_artifacts, remove_logs=False)
+                "cloudinit.cmd.clean",
+                {
+                    "del_dir": {"side_effect": OSError("oops")},
+                    "Init": {"side_effect": self.init_class},
+                },
+                clean.remove_artifacts,
+                remove_logs=False,
+            )
         self.assertEqual(1, retcode)
         self.assertEqual(
-            'Error:\nCould not remove %s/dir1: oops\n' % self.artifact_dir,
-            m_stderr.getvalue())
+            "Error:\nCould not remove %s/dir1: oops\n" % self.artifact_dir,
+            m_stderr.getvalue(),
+        )
 
     def test_handle_clean_args_reboots(self):
         """handle_clean_args_reboots when reboot arg is provided."""
@@ -147,32 +172,40 @@ class TestClean(CiTestCase):
 
         def fake_subp(cmd, capture):
             called_cmds.append((cmd, capture))
-            return '', ''
+            return "", ""
 
-        myargs = namedtuple('MyArgs', 'remove_logs remove_seed reboot')
+        myargs = namedtuple("MyArgs", "remove_logs remove_seed reboot")
         cmdargs = myargs(remove_logs=False, remove_seed=False, reboot=True)
         retcode = wrap_and_call(
-            'cloudinit.cmd.clean',
-            {'subp': {'side_effect': fake_subp},
-             'Init': {'side_effect': self.init_class}},
-            clean.handle_clean_args, name='does not matter', args=cmdargs)
+            "cloudinit.cmd.clean",
+            {
+                "subp": {"side_effect": fake_subp},
+                "Init": {"side_effect": self.init_class},
+            },
+            clean.handle_clean_args,
+            name="does not matter",
+            args=cmdargs,
+        )
         self.assertEqual(0, retcode)
-        self.assertEqual(
-            [(['shutdown', '-r', 'now'], False)], called_cmds)
+        self.assertEqual([(["shutdown", "-r", "now"], False)], called_cmds)
 
     def test_status_main(self):
-        '''clean.main can be run as a standalone script.'''
-        write_file(self.log1, 'cloud-init-log')
+        """clean.main can be run as a standalone script."""
+        write_file(self.log1, "cloud-init-log")
         with self.assertRaises(SystemExit) as context_manager:
             wrap_and_call(
-                'cloudinit.cmd.clean',
-                {'Init': {'side_effect': self.init_class},
-                 'sys.argv': {'new': ['clean', '--logs']}},
-                clean.main)
+                "cloudinit.cmd.clean",
+                {
+                    "Init": {"side_effect": self.init_class},
+                    "sys.argv": {"new": ["clean", "--logs"]},
+                },
+                clean.main,
+            )
 
         self.assertEqual(0, context_manager.exception.code)
         self.assertFalse(
-            os.path.exists(self.log1), 'Unexpected log {0}'.format(self.log1))
+            os.path.exists(self.log1), "Unexpected log {0}".format(self.log1)
+        )
 
 
 # vi: ts=4 expandtab syntax=python
diff --git a/tests/unittests/cmd/test_cloud_id.py b/tests/unittests/cmd/test_cloud_id.py
index 9a010402..42941d4f 100644
--- a/tests/unittests/cmd/test_cloud_id.py
+++ b/tests/unittests/cmd/test_cloud_id.py
@@ -2,41 +2,45 @@
 
 """Tests for cloud-id command line utility."""
 
-from cloudinit import util
 from collections import namedtuple
 from io import StringIO
 
+from cloudinit import util
 from cloudinit.cmd import cloud_id
-
 from tests.unittests.helpers import CiTestCase, mock
 
 
 class TestCloudId(CiTestCase):
 
-    args = namedtuple('cloudidargs', ('instance_data json long'))
+    args = namedtuple("cloudidargs", "instance_data json long")
 
     def setUp(self):
         super(TestCloudId, self).setUp()
         self.tmp = self.tmp_dir()
-        self.instance_data = self.tmp_path('instance-data.json', dir=self.tmp)
+        self.instance_data = self.tmp_path("instance-data.json", dir=self.tmp)
 
     def test_cloud_id_arg_parser_defaults(self):
         """Validate the argument defaults when not provided by the end-user."""
-        cmd = ['cloud-id']
-        with mock.patch('sys.argv', cmd):
+        cmd = ["cloud-id"]
+        with mock.patch("sys.argv", cmd):
             args = cloud_id.get_parser().parse_args()
         self.assertEqual(
-            '/run/cloud-init/instance-data.json',
-            args.instance_data)
+            "/run/cloud-init/instance-data.json", args.instance_data
+        )
         self.assertEqual(False, args.long)
         self.assertEqual(False, args.json)
 
     def test_cloud_id_arg_parse_overrides(self):
         """Override argument defaults by specifying values for each param."""
-        util.write_file(self.instance_data, '{}')
-        cmd = ['cloud-id', '--instance-data', self.instance_data, '--long',
-               '--json']
-        with mock.patch('sys.argv', cmd):
+        util.write_file(self.instance_data, "{}")
+        cmd = [
+            "cloud-id",
+            "--instance-data",
+            self.instance_data,
+            "--long",
+            "--json",
+        ]
+        with mock.patch("sys.argv", cmd):
             args = cloud_id.get_parser().parse_args()
         self.assertEqual(self.instance_data, args.instance_data)
         self.assertEqual(True, args.long)
@@ -44,37 +48,40 @@ class TestCloudId(CiTestCase):
 
     def test_cloud_id_missing_instance_data_json(self):
         """Exit error when the provided instance-data.json does not exist."""
-        cmd = ['cloud-id', '--instance-data', self.instance_data]
-        with mock.patch('sys.argv', cmd):
-            with mock.patch('sys.stderr', new_callable=StringIO) as m_stderr:
+        cmd = ["cloud-id", "--instance-data", self.instance_data]
+        with mock.patch("sys.argv", cmd):
+            with mock.patch("sys.stderr", new_callable=StringIO) as m_stderr:
                 with self.assertRaises(SystemExit) as context_manager:
                     cloud_id.main()
         self.assertEqual(1, context_manager.exception.code)
         self.assertIn(
             "Error:\nFile not found '%s'" % self.instance_data,
-            m_stderr.getvalue())
+            m_stderr.getvalue(),
+        )
 
     def test_cloud_id_non_json_instance_data(self):
         """Exit error when the provided instance-data.json is not json."""
-        cmd = ['cloud-id', '--instance-data', self.instance_data]
-        util.write_file(self.instance_data, '{')
-        with mock.patch('sys.argv', cmd):
-            with mock.patch('sys.stderr', new_callable=StringIO) as m_stderr:
+        cmd = ["cloud-id", "--instance-data", self.instance_data]
+        util.write_file(self.instance_data, "{")
+        with mock.patch("sys.argv", cmd):
+            with mock.patch("sys.stderr", new_callable=StringIO) as m_stderr:
                 with self.assertRaises(SystemExit) as context_manager:
                     cloud_id.main()
         self.assertEqual(1, context_manager.exception.code)
         self.assertIn(
             "Error:\nFile '%s' is not valid json." % self.instance_data,
-            m_stderr.getvalue())
+            m_stderr.getvalue(),
+        )
 
     def test_cloud_id_from_cloud_name_in_instance_data(self):
         """Report canonical cloud-id from cloud_name in instance-data."""
         util.write_file(
             self.instance_data,
-            '{"v1": {"cloud_name": "mycloud", "region": "somereg"}}')
-        cmd = ['cloud-id', '--instance-data', self.instance_data]
-        with mock.patch('sys.argv', cmd):
-            with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+            '{"v1": {"cloud_name": "mycloud", "region": "somereg"}}',
+        )
+        cmd = ["cloud-id", "--instance-data", self.instance_data]
+        with mock.patch("sys.argv", cmd):
+            with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
                 with self.assertRaises(SystemExit) as context_manager:
                     cloud_id.main()
         self.assertEqual(0, context_manager.exception.code)
@@ -84,10 +91,11 @@ class TestCloudId(CiTestCase):
         """Report long cloud-id format from cloud_name and region."""
         util.write_file(
             self.instance_data,
-            '{"v1": {"cloud_name": "mycloud", "region": "somereg"}}')
-        cmd = ['cloud-id', '--instance-data', self.instance_data, '--long']
-        with mock.patch('sys.argv', cmd):
-            with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+            '{"v1": {"cloud_name": "mycloud", "region": "somereg"}}',
+        )
+        cmd = ["cloud-id", "--instance-data", self.instance_data, "--long"]
+        with mock.patch("sys.argv", cmd):
+            with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
                 with self.assertRaises(SystemExit) as context_manager:
                     cloud_id.main()
         self.assertEqual(0, context_manager.exception.code)
@@ -98,10 +106,11 @@ class TestCloudId(CiTestCase):
         util.write_file(
             self.instance_data,
             '{"v1": {"cloud_name": "aws", "region": "cn-north-1",'
-            ' "platform": "ec2"}}')
-        cmd = ['cloud-id', '--instance-data', self.instance_data, '--long']
-        with mock.patch('sys.argv', cmd):
-            with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+            ' "platform": "ec2"}}',
+        )
+        cmd = ["cloud-id", "--instance-data", self.instance_data, "--long"]
+        with mock.patch("sys.argv", cmd):
+            with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
                 with self.assertRaises(SystemExit) as context_manager:
                     cloud_id.main()
         self.assertEqual(0, context_manager.exception.code)
@@ -112,16 +121,24 @@ class TestCloudId(CiTestCase):
         util.write_file(
             self.instance_data,
             '{"v1": {"cloud_name": "unknown", "region": "dfw",'
-            ' "platform": "openstack", "public_ssh_keys": []}}')
-        expected = util.json_dumps({
-            'cloud_id': 'openstack', 'cloud_name': 'unknown',
-            'platform': 'openstack', 'public_ssh_keys': [], 'region': 'dfw'})
-        cmd = ['cloud-id', '--instance-data', self.instance_data, '--json']
-        with mock.patch('sys.argv', cmd):
-            with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+            ' "platform": "openstack", "public_ssh_keys": []}}',
+        )
+        expected = util.json_dumps(
+            {
+                "cloud_id": "openstack",
+                "cloud_name": "unknown",
+                "platform": "openstack",
+                "public_ssh_keys": [],
+                "region": "dfw",
+            }
+        )
+        cmd = ["cloud-id", "--instance-data", self.instance_data, "--json"]
+        with mock.patch("sys.argv", cmd):
+            with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
                 with self.assertRaises(SystemExit) as context_manager:
                     cloud_id.main()
         self.assertEqual(0, context_manager.exception.code)
-        self.assertEqual(expected + '\n', m_stdout.getvalue())
+        self.assertEqual(expected + "\n", m_stdout.getvalue())
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/cmd/test_main.py b/tests/unittests/cmd/test_main.py
index e1ce682b..3e778b0b 100644
--- a/tests/unittests/cmd/test_main.py
+++ b/tests/unittests/cmd/test_main.py
@@ -1,22 +1,20 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from collections import namedtuple
 import copy
 import os
+from collections import namedtuple
 from io import StringIO
 from unittest import mock
 
 import pytest
 
-from cloudinit.cmd import main
 from cloudinit import safeyaml
-from cloudinit.util import (
-    ensure_dir, load_file, write_file)
-from tests.unittests.helpers import (
-    FilesystemMockingTestCase, wrap_and_call)
+from cloudinit.cmd import main
+from cloudinit.util import ensure_dir, load_file, write_file
+from tests.unittests.helpers import FilesystemMockingTestCase, wrap_and_call
 
-mypaths = namedtuple('MyPaths', 'run_dir')
-myargs = namedtuple('MyArgs', 'debug files force local reporter subcommand')
+mypaths = namedtuple("MyPaths", "run_dir")
+myargs = namedtuple("MyArgs", "debug files force local reporter subcommand")
 
 
 class TestMain(FilesystemMockingTestCase):
@@ -26,27 +24,32 @@ class TestMain(FilesystemMockingTestCase):
     def setUp(self):
         super(TestMain, self).setUp()
         self.new_root = self.tmp_dir()
-        self.cloud_dir = self.tmp_path('var/lib/cloud/', dir=self.new_root)
+        self.cloud_dir = self.tmp_path("var/lib/cloud/", dir=self.new_root)
         os.makedirs(self.cloud_dir)
-        self.replicateTestRoot('simple_ubuntu', self.new_root)
+        self.replicateTestRoot("simple_ubuntu", self.new_root)
         self.cfg = {
-            'datasource_list': ['None'],
-            'runcmd': ['ls /etc'],  # test ALL_DISTROS
-            'system_info': {'paths': {'cloud_dir': self.cloud_dir,
-                                      'run_dir': self.new_root}},
-            'write_files': [
+            "datasource_list": ["None"],
+            "runcmd": ["ls /etc"],  # test ALL_DISTROS
+            "system_info": {
+                "paths": {
+                    "cloud_dir": self.cloud_dir,
+                    "run_dir": self.new_root,
+                }
+            },
+            "write_files": [
                 {
-                    'path': '/etc/blah.ini',
-                    'content': 'blah',
-                    'permissions': 0o755,
+                    "path": "/etc/blah.ini",
+                    "content": "blah",
+                    "permissions": 0o755,
                 },
             ],
-            'cloud_init_modules': ['write-files', 'runcmd'],
+            "cloud_init_modules": ["write-files", "runcmd"],
         }
         cloud_cfg = safeyaml.dumps(self.cfg)
-        ensure_dir(os.path.join(self.new_root, 'etc', 'cloud'))
+        ensure_dir(os.path.join(self.new_root, "etc", "cloud"))
         self.cloud_cfg_file = os.path.join(
-            self.new_root, 'etc', 'cloud', 'cloud.cfg')
+            self.new_root, "etc", "cloud", "cloud.cfg"
+        )
         write_file(self.cloud_cfg_file, cloud_cfg)
         self.patchOS(self.new_root)
         self.patchUtils(self.new_root)
@@ -55,31 +58,44 @@ class TestMain(FilesystemMockingTestCase):
 
     def test_main_init_run_net_stops_on_file_no_net(self):
         """When no-net file is present, main_init does not process modules."""
-        stop_file = os.path.join(self.cloud_dir, 'data', 'no-net')  # stop file
-        write_file(stop_file, '')
+        stop_file = os.path.join(self.cloud_dir, "data", "no-net")  # stop file
+        write_file(stop_file, "")
         cmdargs = myargs(
-            debug=False, files=None, force=False, local=False, reporter=None,
-            subcommand='init')
+            debug=False,
+            files=None,
+            force=False,
+            local=False,
+            reporter=None,
+            subcommand="init",
+        )
         (_item1, item2) = wrap_and_call(
-            'cloudinit.cmd.main',
-            {'util.close_stdin': True,
-             'netinfo.debug_info': 'my net debug info',
-             'util.fixup_output': ('outfmt', 'errfmt')},
-            main.main_init, 'init', cmdargs)
+            "cloudinit.cmd.main",
+            {
+                "util.close_stdin": True,
+                "netinfo.debug_info": "my net debug info",
+                "util.fixup_output": ("outfmt", "errfmt"),
+            },
+            main.main_init,
+            "init",
+            cmdargs,
+        )
         # We should not run write_files module
         self.assertFalse(
-            os.path.exists(os.path.join(self.new_root, 'etc/blah.ini')),
-            'Unexpected run of write_files module produced blah.ini')
+            os.path.exists(os.path.join(self.new_root, "etc/blah.ini")),
+            "Unexpected run of write_files module produced blah.ini",
+        )
         self.assertEqual([], item2)
         # Instancify is called
-        instance_id_path = 'var/lib/cloud/data/instance-id'
+        instance_id_path = "var/lib/cloud/data/instance-id"
         self.assertFalse(
             os.path.exists(os.path.join(self.new_root, instance_id_path)),
-            'Unexpected call to datasource.instancify produced instance-id')
+            "Unexpected call to datasource.instancify produced instance-id",
+        )
         expected_logs = [
             "Exiting. stop file ['{stop_file}'] existed\n".format(
-                stop_file=stop_file),
-            'my net debug info'  # netinfo.debug_info
+                stop_file=stop_file
+            ),
+            "my net debug info",  # netinfo.debug_info
         ]
         for log in expected_logs:
             self.assertIn(log, self.stderr.getvalue())
@@ -87,97 +103,133 @@ class TestMain(FilesystemMockingTestCase):
     def test_main_init_run_net_runs_modules(self):
         """Modules like write_files are run in 'net' mode."""
         cmdargs = myargs(
-            debug=False, files=None, force=False, local=False, reporter=None,
-            subcommand='init')
+            debug=False,
+            files=None,
+            force=False,
+            local=False,
+            reporter=None,
+            subcommand="init",
+        )
         (_item1, item2) = wrap_and_call(
-            'cloudinit.cmd.main',
-            {'util.close_stdin': True,
-             'netinfo.debug_info': 'my net debug info',
-             'util.fixup_output': ('outfmt', 'errfmt')},
-            main.main_init, 'init', cmdargs)
+            "cloudinit.cmd.main",
+            {
+                "util.close_stdin": True,
+                "netinfo.debug_info": "my net debug info",
+                "util.fixup_output": ("outfmt", "errfmt"),
+            },
+            main.main_init,
+            "init",
+            cmdargs,
+        )
         self.assertEqual([], item2)
         # Instancify is called
-        instance_id_path = 'var/lib/cloud/data/instance-id'
+        instance_id_path = "var/lib/cloud/data/instance-id"
         self.assertEqual(
-            'iid-datasource-none\n',
-            os.path.join(load_file(
-                os.path.join(self.new_root, instance_id_path))))
+            "iid-datasource-none\n",
+            os.path.join(
+                load_file(os.path.join(self.new_root, instance_id_path))
+            ),
+        )
         # modules are run (including write_files)
         self.assertEqual(
-            'blah', load_file(os.path.join(self.new_root, 'etc/blah.ini')))
+            "blah", load_file(os.path.join(self.new_root, "etc/blah.ini"))
+        )
         expected_logs = [
-            'network config is disabled by fallback',  # apply_network_config
-            'my net debug info',  # netinfo.debug_info
-            'no previous run detected'
+            "network config is disabled by fallback",  # apply_network_config
+            "my net debug info",  # netinfo.debug_info
+            "no previous run detected",
         ]
         for log in expected_logs:
             self.assertIn(log, self.stderr.getvalue())
 
     def test_main_init_run_net_calls_set_hostname_when_metadata_present(self):
         """When local-hostname metadata is present, call cc_set_hostname."""
-        self.cfg['datasource'] = {
-            'None': {'metadata': {'local-hostname': 'md-hostname'}}}
+        self.cfg["datasource"] = {
+            "None": {"metadata": {"local-hostname": "md-hostname"}}
+        }
         cloud_cfg = safeyaml.dumps(self.cfg)
         write_file(self.cloud_cfg_file, cloud_cfg)
         cmdargs = myargs(
-            debug=False, files=None, force=False, local=False, reporter=None,
-            subcommand='init')
+            debug=False,
+            files=None,
+            force=False,
+            local=False,
+            reporter=None,
+            subcommand="init",
+        )
 
         def set_hostname(name, cfg, cloud, log, args):
-            self.assertEqual('set-hostname', name)
+            self.assertEqual("set-hostname", name)
             updated_cfg = copy.deepcopy(self.cfg)
             updated_cfg.update(
-                {'def_log_file': '/var/log/cloud-init.log',
-                 'log_cfgs': [],
-                 'syslog_fix_perms': [
-                     'syslog:adm', 'root:adm', 'root:wheel', 'root:root'
-                 ],
-                 'vendor_data': {'enabled': True, 'prefix': []},
-                 'vendor_data2': {'enabled': True, 'prefix': []}})
-            updated_cfg.pop('system_info')
+                {
+                    "def_log_file": "/var/log/cloud-init.log",
+                    "log_cfgs": [],
+                    "syslog_fix_perms": [
+                        "syslog:adm",
+                        "root:adm",
+                        "root:wheel",
+                        "root:root",
+                    ],
+                    "vendor_data": {"enabled": True, "prefix": []},
+                    "vendor_data2": {"enabled": True, "prefix": []},
+                }
+            )
+            updated_cfg.pop("system_info")
 
             self.assertEqual(updated_cfg, cfg)
             self.assertEqual(main.LOG, log)
             self.assertIsNone(args)
 
         (_item1, item2) = wrap_and_call(
-            'cloudinit.cmd.main',
-            {'util.close_stdin': True,
-             'netinfo.debug_info': 'my net debug info',
-             'cc_set_hostname.handle': {'side_effect': set_hostname},
-             'util.fixup_output': ('outfmt', 'errfmt')},
-            main.main_init, 'init', cmdargs)
+            "cloudinit.cmd.main",
+            {
+                "util.close_stdin": True,
+                "netinfo.debug_info": "my net debug info",
+                "cc_set_hostname.handle": {"side_effect": set_hostname},
+                "util.fixup_output": ("outfmt", "errfmt"),
+            },
+            main.main_init,
+            "init",
+            cmdargs,
+        )
         self.assertEqual([], item2)
         # Instancify is called
-        instance_id_path = 'var/lib/cloud/data/instance-id'
+        instance_id_path = "var/lib/cloud/data/instance-id"
         self.assertEqual(
-            'iid-datasource-none\n',
-            os.path.join(load_file(
-                os.path.join(self.new_root, instance_id_path))))
+            "iid-datasource-none\n",
+            os.path.join(
+                load_file(os.path.join(self.new_root, instance_id_path))
+            ),
+        )
         # modules are run (including write_files)
         self.assertEqual(
-            'blah', load_file(os.path.join(self.new_root, 'etc/blah.ini')))
+            "blah", load_file(os.path.join(self.new_root, "etc/blah.ini"))
+        )
         expected_logs = [
-            'network config is disabled by fallback',  # apply_network_config
-            'my net debug info',  # netinfo.debug_info
-            'no previous run detected'
+            "network config is disabled by fallback",  # apply_network_config
+            "my net debug info",  # netinfo.debug_info
+            "no previous run detected",
         ]
         for log in expected_logs:
             self.assertIn(log, self.stderr.getvalue())
 
 
 class TestShouldBringUpInterfaces:
-    @pytest.mark.parametrize('cfg_disable,args_local,expected', [
-        (True, True, False),
-        (True, False, False),
-        (False, True, False),
-        (False, False, True),
-    ])
+    @pytest.mark.parametrize(
+        "cfg_disable,args_local,expected",
+        [
+            (True, True, False),
+            (True, False, False),
+            (False, True, False),
+            (False, False, True),
+        ],
+    )
     def test_should_bring_up_interfaces(
         self, cfg_disable, args_local, expected
     ):
         init = mock.Mock()
-        init.cfg = {'disable_network_activation': cfg_disable}
+        init.cfg = {"disable_network_activation": cfg_disable}
 
         args = mock.Mock()
         args.local = args_local
@@ -185,4 +237,5 @@ class TestShouldBringUpInterfaces:
         result = main._should_bring_up_interfaces(init, args)
         assert result == expected
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/cmd/test_query.py b/tests/unittests/cmd/test_query.py
index b7d02d13..03a73bb5 100644
--- a/tests/unittests/cmd/test_query.py
+++ b/tests/unittests/cmd/test_query.py
@@ -4,19 +4,21 @@ import errno
 import gzip
 import json
 import os
+from collections import namedtuple
 from io import BytesIO
 from textwrap import dedent
 
 import pytest
 
-from collections import namedtuple
 from cloudinit.cmd import query
 from cloudinit.helpers import Paths
 from cloudinit.sources import (
-    REDACT_SENSITIVE_VALUE, INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE)
-from tests.unittests.helpers import mock
-
+    INSTANCE_JSON_FILE,
+    INSTANCE_JSON_SENSITIVE_FILE,
+    REDACT_SENSITIVE_VALUE,
+)
 from cloudinit.util import b64e, write_file
+from tests.unittests.helpers import mock
 
 
 def _gzip_data(data):
@@ -30,9 +32,10 @@ def _gzip_data(data):
 class TestQuery:
 
     args = namedtuple(
-        'queryargs',
-        ('debug dump_all format instance_data list_keys user_data vendor_data'
-         ' varname'))
+        "queryargs",
+        "debug dump_all format instance_data list_keys user_data vendor_data"
+        " varname",
+    )
 
     def _setup_paths(self, tmpdir, ud_val=None, vd_val=None):
         """Write userdata and vendordata into a tmpdir.
@@ -41,153 +44,191 @@ class TestQuery:
             4-tuple : (paths, run_dir_path, userdata_path, vendordata_path)
         """
         if ud_val:
-            user_data = tmpdir.join('user-data')
+            user_data = tmpdir.join("user-data")
             write_file(user_data.strpath, ud_val)
         else:
             user_data = None
         if vd_val:
-            vendor_data = tmpdir.join('vendor-data')
+            vendor_data = tmpdir.join("vendor-data")
             write_file(vendor_data.strpath, vd_val)
         else:
             vendor_data = None
-        run_dir = tmpdir.join('run_dir')
+        run_dir = tmpdir.join("run_dir")
         run_dir.ensure_dir()
 
-        cloud_dir = tmpdir.join('cloud_dir')
+        cloud_dir = tmpdir.join("cloud_dir")
         cloud_dir.ensure_dir()
 
         return (
             Paths(
-                {'cloud_dir': cloud_dir.strpath, 'run_dir': run_dir.strpath}
+                {"cloud_dir": cloud_dir.strpath, "run_dir": run_dir.strpath}
             ),
             run_dir,
             user_data,
-            vendor_data
+            vendor_data,
         )
 
     def test_handle_args_error_on_missing_param(self, caplog, capsys):
         """Error when missing required parameters and print usage."""
         args = self.args(
-            debug=False, dump_all=False, format=None, instance_data=None,
-            list_keys=False, user_data=None, vendor_data=None, varname=None)
+            debug=False,
+            dump_all=False,
+            format=None,
+            instance_data=None,
+            list_keys=False,
+            user_data=None,
+            vendor_data=None,
+            varname=None,
+        )
         with mock.patch(
             "cloudinit.cmd.query.addLogHandlerCLI", return_value=""
         ) as m_cli_log:
-            assert 1 == query.handle_args('anyname', args)
+            assert 1 == query.handle_args("anyname", args)
         expected_error = (
-            'Expected one of the options: --all, --format, --list-keys'
-            ' or varname\n')
+            "Expected one of the options: --all, --format, --list-keys"
+            " or varname\n"
+        )
         assert expected_error in caplog.text
         out, _err = capsys.readouterr()
-        assert 'usage: query' in out
+        assert "usage: query" in out
         assert 1 == m_cli_log.call_count
 
     @pytest.mark.parametrize(
-        "inst_data,varname,expected_error", (
+        "inst_data,varname,expected_error",
+        (
             (
                 '{"v1": {"key-2": "value-2"}}',
-                'v1.absent_leaf',
-                "instance-data 'v1' has no 'absent_leaf'\n"
+                "v1.absent_leaf",
+                "instance-data 'v1' has no 'absent_leaf'\n",
             ),
             (
                 '{"v1": {"key-2": "value-2"}}',
-                'absent_key',
-                "Undefined instance-data key 'absent_key'\n"
+                "absent_key",
+                "Undefined instance-data key 'absent_key'\n",
             ),
-        )
+        ),
     )
     def test_handle_args_error_on_invalid_vaname_paths(
         self, inst_data, varname, expected_error, caplog, tmpdir
     ):
         """Error when varname is not a valid instance-data variable path."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write(inst_data)
         args = self.args(
-            debug=False, dump_all=False, format=None,
+            debug=False,
+            dump_all=False,
+            format=None,
             instance_data=instance_data.strpath,
-            list_keys=False, user_data=None, vendor_data=None, varname=varname
+            list_keys=False,
+            user_data=None,
+            vendor_data=None,
+            varname=varname,
         )
         paths, _, _, _ = self._setup_paths(tmpdir)
-        with mock.patch('cloudinit.cmd.query.read_cfg_paths') as m_paths:
+        with mock.patch("cloudinit.cmd.query.read_cfg_paths") as m_paths:
             m_paths.return_value = paths
             with mock.patch(
                 "cloudinit.cmd.query.addLogHandlerCLI", return_value=""
             ):
-                with mock.patch('cloudinit.cmd.query.load_userdata') as m_lud:
+                with mock.patch("cloudinit.cmd.query.load_userdata") as m_lud:
                     m_lud.return_value = "ud"
-                    assert 1 == query.handle_args('anyname', args)
+                    assert 1 == query.handle_args("anyname", args)
         assert expected_error in caplog.text
 
     def test_handle_args_error_on_missing_instance_data(self, caplog, tmpdir):
         """When instance_data file path does not exist, log an error."""
-        absent_fn = tmpdir.join('absent')
+        absent_fn = tmpdir.join("absent")
         args = self.args(
-            debug=False, dump_all=True, format=None,
+            debug=False,
+            dump_all=True,
+            format=None,
             instance_data=absent_fn.strpath,
-            list_keys=False, user_data='ud', vendor_data='vd', varname=None)
-        assert 1 == query.handle_args('anyname', args)
+            list_keys=False,
+            user_data="ud",
+            vendor_data="vd",
+            varname=None,
+        )
+        assert 1 == query.handle_args("anyname", args)
 
-        msg = 'Missing instance-data file: %s' % absent_fn
+        msg = "Missing instance-data file: %s" % absent_fn
         assert msg in caplog.text
 
     def test_handle_args_error_when_no_read_permission_instance_data(
         self, caplog, tmpdir
     ):
         """When instance_data file is unreadable, log an error."""
-        noread_fn = tmpdir.join('unreadable')
-        noread_fn.write('thou shall not pass')
+        noread_fn = tmpdir.join("unreadable")
+        noread_fn.write("thou shall not pass")
         args = self.args(
-            debug=False, dump_all=True, format=None,
+            debug=False,
+            dump_all=True,
+            format=None,
             instance_data=noread_fn.strpath,
-            list_keys=False, user_data='ud', vendor_data='vd', varname=None)
-        with mock.patch('cloudinit.cmd.query.util.load_file') as m_load:
-            m_load.side_effect = OSError(errno.EACCES, 'Not allowed')
-            assert 1 == query.handle_args('anyname', args)
+            list_keys=False,
+            user_data="ud",
+            vendor_data="vd",
+            varname=None,
+        )
+        with mock.patch("cloudinit.cmd.query.util.load_file") as m_load:
+            m_load.side_effect = OSError(errno.EACCES, "Not allowed")
+            assert 1 == query.handle_args("anyname", args)
         msg = "No read permission on '%s'. Try sudo" % noread_fn
         assert msg in caplog.text
 
     def test_handle_args_defaults_instance_data(self, caplog, tmpdir):
         """When no instance_data argument, default to configured run_dir."""
         args = self.args(
-            debug=False, dump_all=True, format=None, instance_data=None,
-            list_keys=False, user_data=None, vendor_data=None, varname=None)
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=None,
+            list_keys=False,
+            user_data=None,
+            vendor_data=None,
+            varname=None,
+        )
         paths, run_dir, _, _ = self._setup_paths(tmpdir)
-        with mock.patch('cloudinit.cmd.query.read_cfg_paths') as m_paths:
+        with mock.patch("cloudinit.cmd.query.read_cfg_paths") as m_paths:
             m_paths.return_value = paths
-            assert 1 == query.handle_args('anyname', args)
+            assert 1 == query.handle_args("anyname", args)
         json_file = run_dir.join(INSTANCE_JSON_FILE)
-        msg = 'Missing instance-data file: %s' % json_file.strpath
+        msg = "Missing instance-data file: %s" % json_file.strpath
         assert msg in caplog.text
 
     def test_handle_args_root_fallsback_to_instance_data(self, caplog, tmpdir):
         """When no instance_data argument, root falls back to redacted json."""
         args = self.args(
-            debug=False, dump_all=True, format=None, instance_data=None,
-            list_keys=False, user_data=None, vendor_data=None, varname=None)
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=None,
+            list_keys=False,
+            user_data=None,
+            vendor_data=None,
+            varname=None,
+        )
         paths, run_dir, _, _ = self._setup_paths(tmpdir)
-        with mock.patch('cloudinit.cmd.query.read_cfg_paths') as m_paths:
+        with mock.patch("cloudinit.cmd.query.read_cfg_paths") as m_paths:
             m_paths.return_value = paths
-            with mock.patch('os.getuid') as m_getuid:
+            with mock.patch("os.getuid") as m_getuid:
                 m_getuid.return_value = 0
-                assert 1 == query.handle_args('anyname', args)
+                assert 1 == query.handle_args("anyname", args)
         json_file = run_dir.join(INSTANCE_JSON_FILE)
         sensitive_file = run_dir.join(INSTANCE_JSON_SENSITIVE_FILE)
-        msg = (
-            'Missing root-readable %s. Using redacted %s instead.' %
-            (
-                sensitive_file.strpath, json_file.strpath
-            )
+        msg = "Missing root-readable %s. Using redacted %s instead." % (
+            sensitive_file.strpath,
+            json_file.strpath,
         )
         assert msg in caplog.text
 
     @pytest.mark.parametrize(
-        'ud_src,ud_expected,vd_src,vd_expected',
+        "ud_src,ud_expected,vd_src,vd_expected",
         (
-            ('hi mom', 'hi mom', 'hi pops', 'hi pops'),
-            ('ud'.encode('utf-8'), 'ud', 'vd'.encode('utf-8'), 'vd'),
-            (_gzip_data(b'ud'), 'ud', _gzip_data(b'vd'), 'vd'),
-            (_gzip_data('ud'.encode('utf-8')), 'ud', _gzip_data(b'vd'), 'vd'),
-        )
+            ("hi mom", "hi mom", "hi pops", "hi pops"),
+            ("ud".encode("utf-8"), "ud", "vd".encode("utf-8"), "vd"),
+            (_gzip_data(b"ud"), "ud", _gzip_data(b"vd"), "vd"),
+            (_gzip_data("ud".encode("utf-8")), "ud", _gzip_data(b"vd"), "vd"),
+        ),
     )
     def test_handle_args_root_processes_user_data(
         self, ud_src, ud_expected, vd_src, vd_expected, capsys, tmpdir
@@ -199,23 +240,29 @@ class TestQuery:
         sensitive_file = run_dir.join(INSTANCE_JSON_SENSITIVE_FILE)
         sensitive_file.write('{"my-var": "it worked"}')
         args = self.args(
-            debug=False, dump_all=True, format=None, instance_data=None,
-            list_keys=False, user_data=user_data.strpath,
-            vendor_data=vendor_data.strpath, varname=None)
-        with mock.patch('cloudinit.cmd.query.read_cfg_paths') as m_paths:
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=None,
+            list_keys=False,
+            user_data=user_data.strpath,
+            vendor_data=vendor_data.strpath,
+            varname=None,
+        )
+        with mock.patch("cloudinit.cmd.query.read_cfg_paths") as m_paths:
             m_paths.return_value = paths
-            with mock.patch('os.getuid') as m_getuid:
+            with mock.patch("os.getuid") as m_getuid:
                 m_getuid.return_value = 0
-                assert 0 == query.handle_args('anyname', args)
+                assert 0 == query.handle_args("anyname", args)
         out, _err = capsys.readouterr()
         cmd_output = json.loads(out)
-        assert "it worked" == cmd_output['my-var']
+        assert "it worked" == cmd_output["my-var"]
         if ud_expected == "ci-b64:":
             ud_expected = "ci-b64:{}".format(b64e(ud_src))
         if vd_expected == "ci-b64:":
             vd_expected = "ci-b64:{}".format(b64e(vd_src))
-        assert ud_expected == cmd_output['userdata']
-        assert vd_expected == cmd_output['vendordata']
+        assert ud_expected == cmd_output["userdata"]
+        assert vd_expected == cmd_output["vendordata"]
 
     def test_handle_args_user_vendor_data_defaults_to_instance_link(
         self, capsys, tmpdir
@@ -231,13 +278,19 @@ class TestQuery:
         write_file(vd_path, "instance_link_vd")
 
         args = self.args(
-            debug=False, dump_all=True, format=None, instance_data=None,
-            list_keys=False, user_data=None,
-            vendor_data=None, varname=None)
-        with mock.patch('cloudinit.cmd.query.read_cfg_paths') as m_paths:
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=None,
+            list_keys=False,
+            user_data=None,
+            vendor_data=None,
+            varname=None,
+        )
+        with mock.patch("cloudinit.cmd.query.read_cfg_paths") as m_paths:
             m_paths.return_value = paths
-            with mock.patch('os.getuid', return_value=0):
-                assert 0 == query.handle_args('anyname', args)
+            with mock.patch("os.getuid", return_value=0):
+                assert 0 == query.handle_args("anyname", args)
         expected = (
             '{\n "my-var": "it worked",\n '
             '"userdata": "instance_link_ud",\n '
@@ -251,19 +304,25 @@ class TestQuery:
     ):
         """When no instance_data argument, root uses sensitive json."""
         paths, run_dir, user_data, vendor_data = self._setup_paths(
-            tmpdir, ud_val='ud', vd_val='vd'
+            tmpdir, ud_val="ud", vd_val="vd"
         )
         sensitive_file = run_dir.join(INSTANCE_JSON_SENSITIVE_FILE)
         sensitive_file.write('{"my-var": "it worked"}')
         args = self.args(
-            debug=False, dump_all=True, format=None, instance_data=None,
-            list_keys=False, user_data=user_data.strpath,
-            vendor_data=vendor_data.strpath, varname=None)
-        with mock.patch('cloudinit.cmd.query.read_cfg_paths') as m_paths:
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=None,
+            list_keys=False,
+            user_data=user_data.strpath,
+            vendor_data=vendor_data.strpath,
+            varname=None,
+        )
+        with mock.patch("cloudinit.cmd.query.read_cfg_paths") as m_paths:
             m_paths.return_value = paths
-            with mock.patch('os.getuid') as m_getuid:
+            with mock.patch("os.getuid") as m_getuid:
                 m_getuid.return_value = 0
-                assert 0 == query.handle_args('anyname', args)
+                assert 0 == query.handle_args("anyname", args)
         expected = (
             '{\n "my-var": "it worked",\n '
             '"userdata": "ud",\n "vendordata": "vd"\n}\n'
@@ -273,68 +332,85 @@ class TestQuery:
 
     def test_handle_args_dumps_all_instance_data(self, capsys, tmpdir):
         """When --all is specified query will dump all instance data vars."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write('{"my-var": "it worked"}')
         args = self.args(
-            debug=False, dump_all=True, format=None,
-            instance_data=instance_data.strpath, list_keys=False,
-            user_data='ud', vendor_data='vd', varname=None)
-        with mock.patch('os.getuid') as m_getuid:
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=instance_data.strpath,
+            list_keys=False,
+            user_data="ud",
+            vendor_data="vd",
+            varname=None,
+        )
+        with mock.patch("os.getuid") as m_getuid:
             m_getuid.return_value = 100
-            assert 0 == query.handle_args('anyname', args)
+            assert 0 == query.handle_args("anyname", args)
         expected = (
             '{\n "my-var": "it worked",\n "userdata": "<%s> file:ud",\n'
-            ' "vendordata": "<%s> file:vd"\n}\n' % (
-                REDACT_SENSITIVE_VALUE, REDACT_SENSITIVE_VALUE
-            )
+            ' "vendordata": "<%s> file:vd"\n}\n'
+            % (REDACT_SENSITIVE_VALUE, REDACT_SENSITIVE_VALUE)
         )
         out, _err = capsys.readouterr()
         assert expected == out
 
     def test_handle_args_returns_top_level_varname(self, capsys, tmpdir):
         """When the argument varname is passed, report its value."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write('{"my-var": "it worked"}')
         args = self.args(
-            debug=False, dump_all=True, format=None,
-            instance_data=instance_data.strpath, list_keys=False,
-            user_data='ud', vendor_data='vd', varname='my_var')
-        with mock.patch('os.getuid') as m_getuid:
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=instance_data.strpath,
+            list_keys=False,
+            user_data="ud",
+            vendor_data="vd",
+            varname="my_var",
+        )
+        with mock.patch("os.getuid") as m_getuid:
             m_getuid.return_value = 100
-            assert 0 == query.handle_args('anyname', args)
+            assert 0 == query.handle_args("anyname", args)
         out, _err = capsys.readouterr()
-        assert 'it worked\n' == out
+        assert "it worked\n" == out
 
     @pytest.mark.parametrize(
-        'inst_data,varname,expected',
+        "inst_data,varname,expected",
         (
             (
                 '{"v1": {"key-2": "value-2"}, "my-var": "it worked"}',
-                'v1.key_2',
-                'value-2\n'
+                "v1.key_2",
+                "value-2\n",
             ),
             # Assert no jinja underscore-delimited aliases are reported on CLI
             (
                 '{"v1": {"something-hyphenated": {"no.underscores":"x",'
                 ' "no-alias": "y"}}, "my-var": "it worked"}',
-                'v1.something_hyphenated',
-                '{\n "no-alias": "y",\n "no.underscores": "x"\n}\n'
+                "v1.something_hyphenated",
+                '{\n "no-alias": "y",\n "no.underscores": "x"\n}\n',
             ),
-        )
+        ),
     )
     def test_handle_args_returns_nested_varname(
         self, inst_data, varname, expected, capsys, tmpdir
     ):
         """If user_data file is a jinja template render instance-data vars."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write(inst_data)
         args = self.args(
-            debug=False, dump_all=False, format=None,
-            instance_data=instance_data.strpath, user_data='ud',
-            vendor_data='vd', list_keys=False, varname=varname)
-        with mock.patch('os.getuid') as m_getuid:
+            debug=False,
+            dump_all=False,
+            format=None,
+            instance_data=instance_data.strpath,
+            user_data="ud",
+            vendor_data="vd",
+            list_keys=False,
+            varname=varname,
+        )
+        with mock.patch("os.getuid") as m_getuid:
             m_getuid.return_value = 100
-            assert 0 == query.handle_args('anyname', args)
+            assert 0 == query.handle_args("anyname", args)
         out, _err = capsys.readouterr()
         assert expected == out
 
@@ -342,11 +418,13 @@ class TestQuery:
         self, capsys, tmpdir
     ):
         """Any standardized vars under v# are promoted as top-level aliases."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write(
             '{"v1": {"v1_1": "val1.1"}, "v2": {"v2_2": "val2.2"},'
-            ' "top": "gun"}')
-        expected = dedent("""\
+            ' "top": "gun"}'
+        )
+        expected = dedent(
+            """\
             {
              "top": "gun",
              "userdata": "<redacted for non-root user> file:ud",
@@ -360,14 +438,21 @@ class TestQuery:
              "v2_2": "val2.2",
              "vendordata": "<redacted for non-root user> file:vd"
             }
-        """)
+        """
+        )
         args = self.args(
-            debug=False, dump_all=True, format=None,
-            instance_data=instance_data.strpath, user_data='ud',
-            vendor_data='vd', list_keys=False, varname=None)
-        with mock.patch('os.getuid') as m_getuid:
+            debug=False,
+            dump_all=True,
+            format=None,
+            instance_data=instance_data.strpath,
+            user_data="ud",
+            vendor_data="vd",
+            list_keys=False,
+            varname=None,
+        )
+        with mock.patch("os.getuid") as m_getuid:
             m_getuid.return_value = 100
-            assert 0 == query.handle_args('anyname', args)
+            assert 0 == query.handle_args("anyname", args)
         out, _err = capsys.readouterr()
         assert expected == out
 
@@ -375,18 +460,25 @@ class TestQuery:
         self, capsys, tmpdir
     ):
         """Sort all top-level keys when only --list-keys provided."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write(
             '{"v1": {"v1_1": "val1.1"}, "v2": {"v2_2": "val2.2"},'
-            ' "top": "gun"}')
-        expected = 'top\nuserdata\nv1\nv1_1\nv2\nv2_2\nvendordata\n'
+            ' "top": "gun"}'
+        )
+        expected = "top\nuserdata\nv1\nv1_1\nv2\nv2_2\nvendordata\n"
         args = self.args(
-            debug=False, dump_all=False, format=None,
-            instance_data=instance_data.strpath, list_keys=True,
-            user_data='ud', vendor_data='vd', varname=None)
-        with mock.patch('os.getuid') as m_getuid:
+            debug=False,
+            dump_all=False,
+            format=None,
+            instance_data=instance_data.strpath,
+            list_keys=True,
+            user_data="ud",
+            vendor_data="vd",
+            varname=None,
+        )
+        with mock.patch("os.getuid") as m_getuid:
             m_getuid.return_value = 100
-            assert 0 == query.handle_args('anyname', args)
+            assert 0 == query.handle_args("anyname", args)
         out, _err = capsys.readouterr()
         assert expected == out
 
@@ -394,18 +486,25 @@ class TestQuery:
         self, capsys, tmpdir
     ):
         """Sort all nested keys of varname object when --list-keys provided."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write(
-            '{"v1": {"v1_1": "val1.1", "v1_2": "val1.2"}, "v2":' +
-            ' {"v2_2": "val2.2"}, "top": "gun"}')
-        expected = 'v1_1\nv1_2\n'
+            '{"v1": {"v1_1": "val1.1", "v1_2": "val1.2"}, "v2":'
+            + ' {"v2_2": "val2.2"}, "top": "gun"}'
+        )
+        expected = "v1_1\nv1_2\n"
         args = self.args(
-            debug=False, dump_all=False, format=None,
-            instance_data=instance_data.strpath, list_keys=True,
-            user_data='ud', vendor_data='vd', varname='v1')
-        with mock.patch('os.getuid') as m_getuid:
+            debug=False,
+            dump_all=False,
+            format=None,
+            instance_data=instance_data.strpath,
+            list_keys=True,
+            user_data="ud",
+            vendor_data="vd",
+            varname="v1",
+        )
+        with mock.patch("os.getuid") as m_getuid:
             m_getuid.return_value = 100
-            assert 0 == query.handle_args('anyname', args)
+            assert 0 == query.handle_args("anyname", args)
         out, _err = capsys.readouterr()
         assert expected == out
 
@@ -413,18 +512,26 @@ class TestQuery:
         self, caplog, tmpdir
     ):
         """Raise an error when --list-keys and varname specify a non-list."""
-        instance_data = tmpdir.join('instance-data')
+        instance_data = tmpdir.join("instance-data")
         instance_data.write(
-            '{"v1": {"v1_1": "val1.1", "v1_2": "val1.2"}, "v2": ' +
-            '{"v2_2": "val2.2"}, "top": "gun"}')
+            '{"v1": {"v1_1": "val1.1", "v1_2": "val1.2"}, "v2": '
+            + '{"v2_2": "val2.2"}, "top": "gun"}'
+        )
         expected_error = "--list-keys provided but 'top' is not a dict"
         args = self.args(
-            debug=False, dump_all=False, format=None,
-            instance_data=instance_data.strpath, list_keys=True,
-            user_data='ud', vendor_data='vd', varname='top')
-        with mock.patch('os.getuid') as m_getuid:
+            debug=False,
+            dump_all=False,
+            format=None,
+            instance_data=instance_data.strpath,
+            list_keys=True,
+            user_data="ud",
+            vendor_data="vd",
+            varname="top",
+        )
+        with mock.patch("os.getuid") as m_getuid:
             m_getuid.return_value = 100
-            assert 1 == query.handle_args('anyname', args)
+            assert 1 == query.handle_args("anyname", args)
         assert expected_error in caplog.text
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/cmd/test_status.py b/tests/unittests/cmd/test_status.py
index 49eae043..acd1fea5 100644
--- a/tests/unittests/cmd/test_status.py
+++ b/tests/unittests/cmd/test_status.py
@@ -1,26 +1,25 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from collections import namedtuple
 import os
+from collections import namedtuple
 from io import StringIO
 from textwrap import dedent
 
 from cloudinit.atomic_helper import write_json
 from cloudinit.cmd import status
 from cloudinit.util import ensure_file
-from tests.unittests.helpers import CiTestCase, wrap_and_call, mock
+from tests.unittests.helpers import CiTestCase, mock, wrap_and_call
 
-mypaths = namedtuple('MyPaths', 'run_dir')
-myargs = namedtuple('MyArgs', 'long wait')
+mypaths = namedtuple("MyPaths", "run_dir")
+myargs = namedtuple("MyArgs", "long wait")
 
 
 class TestStatus(CiTestCase):
-
     def setUp(self):
         super(TestStatus, self).setUp()
         self.new_root = self.tmp_dir()
-        self.status_file = self.tmp_path('status.json', self.new_root)
-        self.disable_file = self.tmp_path('cloudinit-disable', self.new_root)
+        self.status_file = self.tmp_path("status.json", self.new_root)
+        self.disable_file = self.tmp_path("cloudinit-disable", self.new_root)
         self.paths = mypaths(run_dir=self.new_root)
 
         class FakeInit(object):
@@ -35,285 +34,419 @@ class TestStatus(CiTestCase):
         self.init_class = FakeInit
 
     def test__is_cloudinit_disabled_false_on_sysvinit(self):
-        '''When not in an environment using systemd, return False.'''
+        """When not in an environment using systemd, return False."""
         ensure_file(self.disable_file)  # Create the ignored disable file
         (is_disabled, reason) = wrap_and_call(
-            'cloudinit.cmd.status',
-            {'uses_systemd': False,
-             'get_cmdline': "root=/dev/my-root not-important"},
-            status._is_cloudinit_disabled, self.disable_file, self.paths)
+            "cloudinit.cmd.status",
+            {
+                "uses_systemd": False,
+                "get_cmdline": "root=/dev/my-root not-important",
+            },
+            status._is_cloudinit_disabled,
+            self.disable_file,
+            self.paths,
+        )
         self.assertFalse(
-            is_disabled, 'expected enabled cloud-init on sysvinit')
-        self.assertEqual('Cloud-init enabled on sysvinit', reason)
+            is_disabled, "expected enabled cloud-init on sysvinit"
+        )
+        self.assertEqual("Cloud-init enabled on sysvinit", reason)
 
     def test__is_cloudinit_disabled_true_on_disable_file(self):
-        '''When using systemd and disable_file is present return disabled.'''
+        """When using systemd and disable_file is present return disabled."""
         ensure_file(self.disable_file)  # Create observed disable file
         (is_disabled, reason) = wrap_and_call(
-            'cloudinit.cmd.status',
-            {'uses_systemd': True,
-             'get_cmdline': "root=/dev/my-root not-important"},
-            status._is_cloudinit_disabled, self.disable_file, self.paths)
-        self.assertTrue(is_disabled, 'expected disabled cloud-init')
+            "cloudinit.cmd.status",
+            {
+                "uses_systemd": True,
+                "get_cmdline": "root=/dev/my-root not-important",
+            },
+            status._is_cloudinit_disabled,
+            self.disable_file,
+            self.paths,
+        )
+        self.assertTrue(is_disabled, "expected disabled cloud-init")
         self.assertEqual(
-            'Cloud-init disabled by {0}'.format(self.disable_file), reason)
+            "Cloud-init disabled by {0}".format(self.disable_file), reason
+        )
 
     def test__is_cloudinit_disabled_false_on_kernel_cmdline_enable(self):
-        '''Not disabled when using systemd and enabled via commandline.'''
+        """Not disabled when using systemd and enabled via commandline."""
         ensure_file(self.disable_file)  # Create ignored disable file
         (is_disabled, reason) = wrap_and_call(
-            'cloudinit.cmd.status',
-            {'uses_systemd': True,
-             'get_cmdline': 'something cloud-init=enabled else'},
-            status._is_cloudinit_disabled, self.disable_file, self.paths)
-        self.assertFalse(is_disabled, 'expected enabled cloud-init')
+            "cloudinit.cmd.status",
+            {
+                "uses_systemd": True,
+                "get_cmdline": "something cloud-init=enabled else",
+            },
+            status._is_cloudinit_disabled,
+            self.disable_file,
+            self.paths,
+        )
+        self.assertFalse(is_disabled, "expected enabled cloud-init")
         self.assertEqual(
-            'Cloud-init enabled by kernel command line cloud-init=enabled',
-            reason)
+            "Cloud-init enabled by kernel command line cloud-init=enabled",
+            reason,
+        )
 
     def test__is_cloudinit_disabled_true_on_kernel_cmdline(self):
-        '''When using systemd and disable_file is present return disabled.'''
+        """When using systemd and disable_file is present return disabled."""
         (is_disabled, reason) = wrap_and_call(
-            'cloudinit.cmd.status',
-            {'uses_systemd': True,
-             'get_cmdline': 'something cloud-init=disabled else'},
-            status._is_cloudinit_disabled, self.disable_file, self.paths)
-        self.assertTrue(is_disabled, 'expected disabled cloud-init')
+            "cloudinit.cmd.status",
+            {
+                "uses_systemd": True,
+                "get_cmdline": "something cloud-init=disabled else",
+            },
+            status._is_cloudinit_disabled,
+            self.disable_file,
+            self.paths,
+        )
+        self.assertTrue(is_disabled, "expected disabled cloud-init")
         self.assertEqual(
-            'Cloud-init disabled by kernel parameter cloud-init=disabled',
-            reason)
+            "Cloud-init disabled by kernel parameter cloud-init=disabled",
+            reason,
+        )
 
     def test__is_cloudinit_disabled_true_when_generator_disables(self):
-        '''When cloud-init-generator doesn't write enabled file return True.'''
-        enabled_file = os.path.join(self.paths.run_dir, 'enabled')
+        """When cloud-init-generator doesn't write enabled file return True."""
+        enabled_file = os.path.join(self.paths.run_dir, "enabled")
         self.assertFalse(os.path.exists(enabled_file))
         (is_disabled, reason) = wrap_and_call(
-            'cloudinit.cmd.status',
-            {'uses_systemd': True,
-             'get_cmdline': 'something'},
-            status._is_cloudinit_disabled, self.disable_file, self.paths)
-        self.assertTrue(is_disabled, 'expected disabled cloud-init')
-        self.assertEqual('Cloud-init disabled by cloud-init-generator', reason)
+            "cloudinit.cmd.status",
+            {"uses_systemd": True, "get_cmdline": "something"},
+            status._is_cloudinit_disabled,
+            self.disable_file,
+            self.paths,
+        )
+        self.assertTrue(is_disabled, "expected disabled cloud-init")
+        self.assertEqual("Cloud-init disabled by cloud-init-generator", reason)
 
     def test__is_cloudinit_disabled_false_when_enabled_in_systemd(self):
-        '''Report enabled when systemd generator creates the enabled file.'''
-        enabled_file = os.path.join(self.paths.run_dir, 'enabled')
+        """Report enabled when systemd generator creates the enabled file."""
+        enabled_file = os.path.join(self.paths.run_dir, "enabled")
         ensure_file(enabled_file)
         (is_disabled, reason) = wrap_and_call(
-            'cloudinit.cmd.status',
-            {'uses_systemd': True,
-             'get_cmdline': 'something ignored'},
-            status._is_cloudinit_disabled, self.disable_file, self.paths)
-        self.assertFalse(is_disabled, 'expected enabled cloud-init')
+            "cloudinit.cmd.status",
+            {"uses_systemd": True, "get_cmdline": "something ignored"},
+            status._is_cloudinit_disabled,
+            self.disable_file,
+            self.paths,
+        )
+        self.assertFalse(is_disabled, "expected enabled cloud-init")
         self.assertEqual(
-            'Cloud-init enabled by systemd cloud-init-generator', reason)
+            "Cloud-init enabled by systemd cloud-init-generator", reason
+        )
 
     def test_status_returns_not_run(self):
-        '''When status.json does not exist yet, return 'not run'.'''
+        """When status.json does not exist yet, return 'not run'."""
         self.assertFalse(
-            os.path.exists(self.status_file), 'Unexpected status.json found')
+            os.path.exists(self.status_file), "Unexpected status.json found"
+        )
         cmdargs = myargs(long=False, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
-        self.assertEqual('status: not run\n', m_stdout.getvalue())
+        self.assertEqual("status: not run\n", m_stdout.getvalue())
 
     def test_status_returns_disabled_long_on_presence_of_disable_file(self):
-        '''When cloudinit is disabled, return disabled reason.'''
+        """When cloudinit is disabled, return disabled reason."""
 
         checked_files = []
 
         def fakeexists(filepath):
             checked_files.append(filepath)
-            status_file = os.path.join(self.paths.run_dir, 'status.json')
+            status_file = os.path.join(self.paths.run_dir, "status.json")
             return bool(not filepath == status_file)
 
         cmdargs = myargs(long=True, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'os.path.exists': {'side_effect': fakeexists},
-                 '_is_cloudinit_disabled': (True, 'disabled for some reason'),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "os.path.exists": {"side_effect": fakeexists},
+                    "_is_cloudinit_disabled": (
+                        True,
+                        "disabled for some reason",
+                    ),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
         self.assertEqual(
-            [os.path.join(self.paths.run_dir, 'status.json')],
-            checked_files)
-        expected = dedent('''\
+            [os.path.join(self.paths.run_dir, "status.json")], checked_files
+        )
+        expected = dedent(
+            """\
             status: disabled
             detail:
             disabled for some reason
-        ''')
+        """
+        )
         self.assertEqual(expected, m_stdout.getvalue())
 
     def test_status_returns_running_on_no_results_json(self):
-        '''Report running when status.json exists but result.json does not.'''
-        result_file = self.tmp_path('result.json', self.new_root)
+        """Report running when status.json exists but result.json does not."""
+        result_file = self.tmp_path("result.json", self.new_root)
         write_json(self.status_file, {})
         self.assertFalse(
-            os.path.exists(result_file), 'Unexpected result.json found')
+            os.path.exists(result_file), "Unexpected result.json found"
+        )
         cmdargs = myargs(long=False, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
-        self.assertEqual('status: running\n', m_stdout.getvalue())
+        self.assertEqual("status: running\n", m_stdout.getvalue())
 
     def test_status_returns_running(self):
-        '''Report running when status exists with an unfinished stage.'''
-        ensure_file(self.tmp_path('result.json', self.new_root))
-        write_json(self.status_file,
-                   {'v1': {'init': {'start': 1, 'finished': None}}})
+        """Report running when status exists with an unfinished stage."""
+        ensure_file(self.tmp_path("result.json", self.new_root))
+        write_json(
+            self.status_file, {"v1": {"init": {"start": 1, "finished": None}}}
+        )
         cmdargs = myargs(long=False, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
-        self.assertEqual('status: running\n', m_stdout.getvalue())
+        self.assertEqual("status: running\n", m_stdout.getvalue())
 
     def test_status_returns_done(self):
-        '''Report done results.json exists no stages are unfinished.'''
-        ensure_file(self.tmp_path('result.json', self.new_root))
+        """Report done results.json exists no stages are unfinished."""
+        ensure_file(self.tmp_path("result.json", self.new_root))
         write_json(
             self.status_file,
-            {'v1': {'stage': None,  # No current stage running
-                    'datasource': (
-                        'DataSourceNoCloud [seed=/var/.../seed/nocloud-net]'
-                        '[dsmode=net]'),
-                    'blah': {'finished': 123.456},
-                    'init': {'errors': [], 'start': 124.567,
-                             'finished': 125.678},
-                    'init-local': {'start': 123.45, 'finished': 123.46}}})
+            {
+                "v1": {
+                    "stage": None,  # No current stage running
+                    "datasource": (
+                        "DataSourceNoCloud [seed=/var/.../seed/nocloud-net]"
+                        "[dsmode=net]"
+                    ),
+                    "blah": {"finished": 123.456},
+                    "init": {
+                        "errors": [],
+                        "start": 124.567,
+                        "finished": 125.678,
+                    },
+                    "init-local": {"start": 123.45, "finished": 123.46},
+                }
+            },
+        )
         cmdargs = myargs(long=False, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
-        self.assertEqual('status: done\n', m_stdout.getvalue())
+        self.assertEqual("status: done\n", m_stdout.getvalue())
 
     def test_status_returns_done_long(self):
-        '''Long format of done status includes datasource info.'''
-        ensure_file(self.tmp_path('result.json', self.new_root))
+        """Long format of done status includes datasource info."""
+        ensure_file(self.tmp_path("result.json", self.new_root))
         write_json(
             self.status_file,
-            {'v1': {'stage': None,
-                    'datasource': (
-                        'DataSourceNoCloud [seed=/var/.../seed/nocloud-net]'
-                        '[dsmode=net]'),
-                    'init': {'start': 124.567, 'finished': 125.678},
-                    'init-local': {'start': 123.45, 'finished': 123.46}}})
+            {
+                "v1": {
+                    "stage": None,
+                    "datasource": (
+                        "DataSourceNoCloud [seed=/var/.../seed/nocloud-net]"
+                        "[dsmode=net]"
+                    ),
+                    "init": {"start": 124.567, "finished": 125.678},
+                    "init-local": {"start": 123.45, "finished": 123.46},
+                }
+            },
+        )
         cmdargs = myargs(long=True, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
-        expected = dedent('''\
+        expected = dedent(
+            """\
             status: done
             time: Thu, 01 Jan 1970 00:02:05 +0000
             detail:
             DataSourceNoCloud [seed=/var/.../seed/nocloud-net][dsmode=net]
-        ''')
+        """
+        )
         self.assertEqual(expected, m_stdout.getvalue())
 
     def test_status_on_errors(self):
-        '''Reports error when any stage has errors.'''
+        """Reports error when any stage has errors."""
         write_json(
             self.status_file,
-            {'v1': {'stage': None,
-                    'blah': {'errors': [], 'finished': 123.456},
-                    'init': {'errors': ['error1'], 'start': 124.567,
-                             'finished': 125.678},
-                    'init-local': {'start': 123.45, 'finished': 123.46}}})
+            {
+                "v1": {
+                    "stage": None,
+                    "blah": {"errors": [], "finished": 123.456},
+                    "init": {
+                        "errors": ["error1"],
+                        "start": 124.567,
+                        "finished": 125.678,
+                    },
+                    "init-local": {"start": 123.45, "finished": 123.46},
+                }
+            },
+        )
         cmdargs = myargs(long=False, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(1, retcode)
-        self.assertEqual('status: error\n', m_stdout.getvalue())
+        self.assertEqual("status: error\n", m_stdout.getvalue())
 
     def test_status_on_errors_long(self):
-        '''Long format of error status includes all error messages.'''
+        """Long format of error status includes all error messages."""
         write_json(
             self.status_file,
-            {'v1': {'stage': None,
-                    'datasource': (
-                        'DataSourceNoCloud [seed=/var/.../seed/nocloud-net]'
-                        '[dsmode=net]'),
-                    'init': {'errors': ['error1'], 'start': 124.567,
-                             'finished': 125.678},
-                    'init-local': {'errors': ['error2', 'error3'],
-                                   'start': 123.45, 'finished': 123.46}}})
+            {
+                "v1": {
+                    "stage": None,
+                    "datasource": (
+                        "DataSourceNoCloud [seed=/var/.../seed/nocloud-net]"
+                        "[dsmode=net]"
+                    ),
+                    "init": {
+                        "errors": ["error1"],
+                        "start": 124.567,
+                        "finished": 125.678,
+                    },
+                    "init-local": {
+                        "errors": ["error2", "error3"],
+                        "start": 123.45,
+                        "finished": 123.46,
+                    },
+                }
+            },
+        )
         cmdargs = myargs(long=True, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(1, retcode)
-        expected = dedent('''\
+        expected = dedent(
+            """\
             status: error
             time: Thu, 01 Jan 1970 00:02:05 +0000
             detail:
             error1
             error2
             error3
-        ''')
+        """
+        )
         self.assertEqual(expected, m_stdout.getvalue())
 
     def test_status_returns_running_long_format(self):
-        '''Long format reports the stage in which we are running.'''
+        """Long format reports the stage in which we are running."""
         write_json(
             self.status_file,
-            {'v1': {'stage': 'init',
-                    'init': {'start': 124.456, 'finished': None},
-                    'init-local': {'start': 123.45, 'finished': 123.46}}})
+            {
+                "v1": {
+                    "stage": "init",
+                    "init": {"start": 124.456, "finished": None},
+                    "init-local": {"start": 123.45, "finished": 123.46},
+                }
+            },
+        )
         cmdargs = myargs(long=True, wait=False)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
-        expected = dedent('''\
+        expected = dedent(
+            """\
             status: running
             time: Thu, 01 Jan 1970 00:02:04 +0000
             detail:
             Running in stage: init
-        ''')
+        """
+        )
         self.assertEqual(expected, m_stdout.getvalue())
 
     def test_status_wait_blocks_until_done(self):
-        '''Specifying wait will poll every 1/4 second until done state.'''
+        """Specifying wait will poll every 1/4 second until done state."""
         running_json = {
-            'v1': {'stage': 'init',
-                   'init': {'start': 124.456, 'finished': None},
-                   'init-local': {'start': 123.45, 'finished': 123.46}}}
+            "v1": {
+                "stage": "init",
+                "init": {"start": 124.456, "finished": None},
+                "init-local": {"start": 123.45, "finished": 123.46},
+            }
+        }
         done_json = {
-            'v1': {'stage': None,
-                   'init': {'start': 124.456, 'finished': 125.678},
-                   'init-local': {'start': 123.45, 'finished': 123.46}}}
+            "v1": {
+                "stage": None,
+                "init": {"start": 124.456, "finished": 125.678},
+                "init-local": {"start": 123.45, "finished": 123.46},
+            }
+        }
 
         self.sleep_calls = 0
 
@@ -324,32 +457,46 @@ class TestStatus(CiTestCase):
                 write_json(self.status_file, running_json)
             elif self.sleep_calls == 3:
                 write_json(self.status_file, done_json)
-                result_file = self.tmp_path('result.json', self.new_root)
+                result_file = self.tmp_path("result.json", self.new_root)
                 ensure_file(result_file)
 
         cmdargs = myargs(long=False, wait=True)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'sleep': {'side_effect': fake_sleep},
-                 '_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "sleep": {"side_effect": fake_sleep},
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(0, retcode)
         self.assertEqual(4, self.sleep_calls)
-        self.assertEqual('....\nstatus: done\n', m_stdout.getvalue())
+        self.assertEqual("....\nstatus: done\n", m_stdout.getvalue())
 
     def test_status_wait_blocks_until_error(self):
-        '''Specifying wait will poll every 1/4 second until error state.'''
+        """Specifying wait will poll every 1/4 second until error state."""
         running_json = {
-            'v1': {'stage': 'init',
-                   'init': {'start': 124.456, 'finished': None},
-                   'init-local': {'start': 123.45, 'finished': 123.46}}}
+            "v1": {
+                "stage": "init",
+                "init": {"start": 124.456, "finished": None},
+                "init-local": {"start": 123.45, "finished": 123.46},
+            }
+        }
         error_json = {
-            'v1': {'stage': None,
-                   'init': {'errors': ['error1'], 'start': 124.456,
-                            'finished': 125.678},
-                   'init-local': {'start': 123.45, 'finished': 123.46}}}
+            "v1": {
+                "stage": None,
+                "init": {
+                    "errors": ["error1"],
+                    "start": 124.456,
+                    "finished": 125.678,
+                },
+                "init-local": {"start": 123.45, "finished": 123.46},
+            }
+        }
 
         self.sleep_calls = 0
 
@@ -362,30 +509,40 @@ class TestStatus(CiTestCase):
                 write_json(self.status_file, error_json)
 
         cmdargs = myargs(long=False, wait=True)
-        with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+        with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
             retcode = wrap_and_call(
-                'cloudinit.cmd.status',
-                {'sleep': {'side_effect': fake_sleep},
-                 '_is_cloudinit_disabled': (False, ''),
-                 'Init': {'side_effect': self.init_class}},
-                status.handle_status_args, 'ignored', cmdargs)
+                "cloudinit.cmd.status",
+                {
+                    "sleep": {"side_effect": fake_sleep},
+                    "_is_cloudinit_disabled": (False, ""),
+                    "Init": {"side_effect": self.init_class},
+                },
+                status.handle_status_args,
+                "ignored",
+                cmdargs,
+            )
         self.assertEqual(1, retcode)
         self.assertEqual(4, self.sleep_calls)
-        self.assertEqual('....\nstatus: error\n', m_stdout.getvalue())
+        self.assertEqual("....\nstatus: error\n", m_stdout.getvalue())
 
     def test_status_main(self):
-        '''status.main can be run as a standalone script.'''
-        write_json(self.status_file,
-                   {'v1': {'init': {'start': 1, 'finished': None}}})
+        """status.main can be run as a standalone script."""
+        write_json(
+            self.status_file, {"v1": {"init": {"start": 1, "finished": None}}}
+        )
         with self.assertRaises(SystemExit) as context_manager:
-            with mock.patch('sys.stdout', new_callable=StringIO) as m_stdout:
+            with mock.patch("sys.stdout", new_callable=StringIO) as m_stdout:
                 wrap_and_call(
-                    'cloudinit.cmd.status',
-                    {'sys.argv': {'new': ['status']},
-                     '_is_cloudinit_disabled': (False, ''),
-                     'Init': {'side_effect': self.init_class}},
-                    status.main)
+                    "cloudinit.cmd.status",
+                    {
+                        "sys.argv": {"new": ["status"]},
+                        "_is_cloudinit_disabled": (False, ""),
+                        "Init": {"side_effect": self.init_class},
+                    },
+                    status.main,
+                )
         self.assertEqual(0, context_manager.exception.code)
-        self.assertEqual('status: running\n', m_stdout.getvalue())
+        self.assertEqual("status: running\n", m_stdout.getvalue())
+
 
 # vi: ts=4 expandtab syntax=python
diff --git a/tests/unittests/config/test_apt_conf_v1.py b/tests/unittests/config/test_apt_conf_v1.py
index 98d99945..5a75cf0a 100644
--- a/tests/unittests/config/test_apt_conf_v1.py
+++ b/tests/unittests/config/test_apt_conf_v1.py
@@ -1,16 +1,15 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.config import cc_apt_configure
-from cloudinit import util
-
-from tests.unittests.helpers import TestCase
-
 import copy
 import os
 import re
 import shutil
 import tempfile
 
+from cloudinit import util
+from cloudinit.config import cc_apt_configure
+from tests.unittests.helpers import TestCase
+
 
 class TestAptProxyConfig(TestCase):
     def setUp(self):
@@ -23,10 +22,12 @@ class TestAptProxyConfig(TestCase):
     def _search_apt_config(self, contents, ptype, value):
         return re.search(
             r"acquire::%s::proxy\s+[\"']%s[\"'];\n" % (ptype, value),
-            contents, flags=re.IGNORECASE)
+            contents,
+            flags=re.IGNORECASE,
+        )
 
     def test_apt_proxy_written(self):
-        cfg = {'proxy': 'myproxy'}
+        cfg = {"proxy": "myproxy"}
         cc_apt_configure.apply_apt_config(cfg, self.pfile, self.cfile)
 
         self.assertTrue(os.path.isfile(self.pfile))
@@ -36,7 +37,7 @@ class TestAptProxyConfig(TestCase):
         self.assertTrue(self._search_apt_config(contents, "http", "myproxy"))
 
     def test_apt_http_proxy_written(self):
-        cfg = {'http_proxy': 'myproxy'}
+        cfg = {"http_proxy": "myproxy"}
         cc_apt_configure.apply_apt_config(cfg, self.pfile, self.cfile)
 
         self.assertTrue(os.path.isfile(self.pfile))
@@ -46,14 +47,17 @@ class TestAptProxyConfig(TestCase):
         self.assertTrue(self._search_apt_config(contents, "http", "myproxy"))
 
     def test_apt_all_proxy_written(self):
-        cfg = {'http_proxy': 'myproxy_http_proxy',
-               'https_proxy': 'myproxy_https_proxy',
-               'ftp_proxy': 'myproxy_ftp_proxy'}
-
-        values = {'http': cfg['http_proxy'],
-                  'https': cfg['https_proxy'],
-                  'ftp': cfg['ftp_proxy'],
-                  }
+        cfg = {
+            "http_proxy": "myproxy_http_proxy",
+            "https_proxy": "myproxy_https_proxy",
+            "ftp_proxy": "myproxy_ftp_proxy",
+        }
+
+        values = {
+            "http": cfg["http_proxy"],
+            "https": cfg["https_proxy"],
+            "ftp": cfg["ftp_proxy"],
+        }
 
         cc_apt_configure.apply_apt_config(cfg, self.pfile, self.cfile)
 
@@ -73,15 +77,16 @@ class TestAptProxyConfig(TestCase):
 
     def test_proxy_replaced(self):
         util.write_file(self.cfile, "content doesnt matter")
-        cc_apt_configure.apply_apt_config({'proxy': "foo"},
-                                          self.pfile, self.cfile)
+        cc_apt_configure.apply_apt_config(
+            {"proxy": "foo"}, self.pfile, self.cfile
+        )
         self.assertTrue(os.path.isfile(self.pfile))
         contents = util.load_file(self.pfile)
         self.assertTrue(self._search_apt_config(contents, "http", "foo"))
 
     def test_config_written(self):
-        payload = 'this is my apt config'
-        cfg = {'conf': payload}
+        payload = "this is my apt config"
+        cfg = {"conf": payload}
 
         cc_apt_configure.apply_apt_config(cfg, self.pfile, self.cfile)
 
@@ -92,8 +97,9 @@ class TestAptProxyConfig(TestCase):
 
     def test_config_replaced(self):
         util.write_file(self.pfile, "content doesnt matter")
-        cc_apt_configure.apply_apt_config({'conf': "foo"},
-                                          self.pfile, self.cfile)
+        cc_apt_configure.apply_apt_config(
+            {"conf": "foo"}, self.pfile, self.cfile
+        )
         self.assertTrue(os.path.isfile(self.cfile))
         self.assertEqual(util.load_file(self.cfile), "foo")
 
@@ -109,21 +115,23 @@ class TestConversion(TestCase):
     def test_convert_with_apt_mirror_as_empty_string(self):
         # an empty apt_mirror is the same as no apt_mirror
         empty_m_found = cc_apt_configure.convert_to_v3_apt_format(
-            {'apt_mirror': ''})
+            {"apt_mirror": ""}
+        )
         default_found = cc_apt_configure.convert_to_v3_apt_format({})
         self.assertEqual(default_found, empty_m_found)
 
     def test_convert_with_apt_mirror(self):
-        mirror = 'http://my.mirror/ubuntu'
-        f = cc_apt_configure.convert_to_v3_apt_format({'apt_mirror': mirror})
-        self.assertIn(mirror, set(m['uri'] for m in f['apt']['primary']))
+        mirror = "http://my.mirror/ubuntu"
+        f = cc_apt_configure.convert_to_v3_apt_format({"apt_mirror": mirror})
+        self.assertIn(mirror, set(m["uri"] for m in f["apt"]["primary"]))
 
     def test_no_old_content(self):
-        mirror = 'http://my.mirror/ubuntu'
-        mydata = {'apt': {'primary': {'arches': ['default'], 'uri': mirror}}}
+        mirror = "http://my.mirror/ubuntu"
+        mydata = {"apt": {"primary": {"arches": ["default"], "uri": mirror}}}
         expected = copy.deepcopy(mydata)
-        self.assertEqual(expected,
-                         cc_apt_configure.convert_to_v3_apt_format(mydata))
+        self.assertEqual(
+            expected, cc_apt_configure.convert_to_v3_apt_format(mydata)
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_apt_configure_sources_list_v1.py b/tests/unittests/config/test_apt_configure_sources_list_v1.py
index 4aeaea24..d4ade106 100644
--- a/tests/unittests/config/test_apt_configure_sources_list_v1.py
+++ b/tests/unittests/config/test_apt_configure_sources_list_v1.py
@@ -9,14 +9,9 @@ import shutil
 import tempfile
 from unittest import mock
 
-from cloudinit import templater
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import subp, templater, util
 from cloudinit.config import cc_apt_configure
-
 from cloudinit.distros.debian import Distro
-
 from tests.unittests import helpers as t_help
 from tests.unittests.util import get_cloud
 
@@ -41,8 +36,7 @@ apt_custom_sources_list: |
     # FIND_SOMETHING_SPECIAL
 """
 
-EXPECTED_CONVERTED_CONTENT = (
-    """## Note, this file is written by cloud-init on first boot of an instance
+EXPECTED_CONVERTED_CONTENT = """## Note, this file is written by cloud-init on first boot of an instance
 ## modifications made here will not survive a re-bundle.
 ## if you wish to make changes you can:
 ## a.) add 'apt_preserve_sources_list: true' to /etc/cloud/cloud.cfg
@@ -55,13 +49,14 @@ EXPECTED_CONVERTED_CONTENT = (
 deb http://archive.ubuntu.com/ubuntu/ fakerelease main restricted
 deb-src http://archive.ubuntu.com/ubuntu/ fakerelease main restricted
 # FIND_SOMETHING_SPECIAL
-""")
+"""
 
 
 class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
     """TestAptSourceConfigSourceList
     Main Class to test sources list rendering
     """
+
     def setUp(self):
         super(TestAptSourceConfigSourceList, self).setUp()
         self.subp = subp.subp
@@ -70,11 +65,11 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
 
         rpatcher = mock.patch("cloudinit.util.lsb_release")
         get_rel = rpatcher.start()
-        get_rel.return_value = {'codename': "fakerelease"}
+        get_rel.return_value = {"codename": "fakerelease"}
         self.addCleanup(rpatcher.stop)
         apatcher = mock.patch("cloudinit.util.get_dpkg_architecture")
         get_arch = apatcher.start()
-        get_arch.return_value = 'amd64'
+        get_arch.return_value = "amd64"
         self.addCleanup(apatcher.stop)
 
     def apt_source_list(self, distro, mirror, mirrorcheck=None):
@@ -85,47 +80,57 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
             mirrorcheck = mirror
 
         if isinstance(mirror, list):
-            cfg = {'apt_mirror_search': mirror}
+            cfg = {"apt_mirror_search": mirror}
         else:
-            cfg = {'apt_mirror': mirror}
+            cfg = {"apt_mirror": mirror}
 
         mycloud = get_cloud(distro)
 
-        with mock.patch.object(util, 'write_file') as mockwf:
-            with mock.patch.object(util, 'load_file',
-                                   return_value="faketmpl") as mocklf:
-                with mock.patch.object(os.path, 'isfile',
-                                       return_value=True) as mockisfile:
+        with mock.patch.object(util, "write_file") as mockwf:
+            with mock.patch.object(
+                util, "load_file", return_value="faketmpl"
+            ) as mocklf:
+                with mock.patch.object(
+                    os.path, "isfile", return_value=True
+                ) as mockisfile:
                     with mock.patch.object(
-                        templater, 'render_string',
-                            return_value='fake') as mockrnd:
-                        with mock.patch.object(util, 'rename'):
-                            cc_apt_configure.handle("test", cfg, mycloud,
-                                                    LOG, None)
+                        templater, "render_string", return_value="fake"
+                    ) as mockrnd:
+                        with mock.patch.object(util, "rename"):
+                            cc_apt_configure.handle(
+                                "test", cfg, mycloud, LOG, None
+                            )
 
         mockisfile.assert_any_call(
-            ('/etc/cloud/templates/sources.list.%s.tmpl' % distro))
+            "/etc/cloud/templates/sources.list.%s.tmpl" % distro
+        )
         mocklf.assert_any_call(
-            ('/etc/cloud/templates/sources.list.%s.tmpl' % distro))
-        mockrnd.assert_called_once_with('faketmpl',
-                                        {'RELEASE': 'fakerelease',
-                                         'PRIMARY': mirrorcheck,
-                                         'MIRROR': mirrorcheck,
-                                         'SECURITY': mirrorcheck,
-                                         'codename': 'fakerelease',
-                                         'primary': mirrorcheck,
-                                         'mirror': mirrorcheck,
-                                         'security': mirrorcheck})
-        mockwf.assert_called_once_with('/etc/apt/sources.list', 'fake',
-                                       mode=0o644)
+            "/etc/cloud/templates/sources.list.%s.tmpl" % distro
+        )
+        mockrnd.assert_called_once_with(
+            "faketmpl",
+            {
+                "RELEASE": "fakerelease",
+                "PRIMARY": mirrorcheck,
+                "MIRROR": mirrorcheck,
+                "SECURITY": mirrorcheck,
+                "codename": "fakerelease",
+                "primary": mirrorcheck,
+                "mirror": mirrorcheck,
+                "security": mirrorcheck,
+            },
+        )
+        mockwf.assert_called_once_with(
+            "/etc/apt/sources.list", "fake", mode=0o644
+        )
 
     def test_apt_v1_source_list_debian(self):
         """Test rendering of a source.list from template for debian"""
-        self.apt_source_list('debian', 'http://httpredir.debian.org/debian')
+        self.apt_source_list("debian", "http://httpredir.debian.org/debian")
 
     def test_apt_v1_source_list_ubuntu(self):
         """Test rendering of a source.list from template for ubuntu"""
-        self.apt_source_list('ubuntu', 'http://archive.ubuntu.com/ubuntu/')
+        self.apt_source_list("ubuntu", "http://archive.ubuntu.com/ubuntu/")
 
     @staticmethod
     def myresolve(name):
@@ -139,23 +144,30 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
 
     def test_apt_v1_srcl_debian_mirrorfail(self):
         """Test rendering of a source.list from template for debian"""
-        with mock.patch.object(util, 'is_resolvable',
-                               side_effect=self.myresolve) as mockresolve:
-            self.apt_source_list('debian',
-                                 ['http://does.not.exist',
-                                  'http://httpredir.debian.org/debian'],
-                                 'http://httpredir.debian.org/debian')
+        with mock.patch.object(
+            util, "is_resolvable", side_effect=self.myresolve
+        ) as mockresolve:
+            self.apt_source_list(
+                "debian",
+                [
+                    "http://does.not.exist",
+                    "http://httpredir.debian.org/debian",
+                ],
+                "http://httpredir.debian.org/debian",
+            )
         mockresolve.assert_any_call("does.not.exist")
         mockresolve.assert_any_call("httpredir.debian.org")
 
     def test_apt_v1_srcl_ubuntu_mirrorfail(self):
         """Test rendering of a source.list from template for ubuntu"""
-        with mock.patch.object(util, 'is_resolvable',
-                               side_effect=self.myresolve) as mockresolve:
-            self.apt_source_list('ubuntu',
-                                 ['http://does.not.exist',
-                                  'http://archive.ubuntu.com/ubuntu/'],
-                                 'http://archive.ubuntu.com/ubuntu/')
+        with mock.patch.object(
+            util, "is_resolvable", side_effect=self.myresolve
+        ) as mockresolve:
+            self.apt_source_list(
+                "ubuntu",
+                ["http://does.not.exist", "http://archive.ubuntu.com/ubuntu/"],
+                "http://archive.ubuntu.com/ubuntu/",
+            )
         mockresolve.assert_any_call("does.not.exist")
         mockresolve.assert_any_call("archive.ubuntu.com")
 
@@ -165,17 +177,18 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
         mycloud = get_cloud()
 
         # the second mock restores the original subp
-        with mock.patch.object(util, 'write_file') as mockwrite:
-            with mock.patch.object(subp, 'subp', self.subp):
-                with mock.patch.object(Distro, 'get_primary_arch',
-                                       return_value='amd64'):
-                    cc_apt_configure.handle("notimportant", cfg, mycloud,
-                                            LOG, None)
+        with mock.patch.object(util, "write_file") as mockwrite:
+            with mock.patch.object(subp, "subp", self.subp):
+                with mock.patch.object(
+                    Distro, "get_primary_arch", return_value="amd64"
+                ):
+                    cc_apt_configure.handle(
+                        "notimportant", cfg, mycloud, LOG, None
+                    )
 
         mockwrite.assert_called_once_with(
-            '/etc/apt/sources.list',
-            EXPECTED_CONVERTED_CONTENT,
-            mode=420)
+            "/etc/apt/sources.list", EXPECTED_CONVERTED_CONTENT, mode=420
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_apt_configure_sources_list_v3.py b/tests/unittests/config/test_apt_configure_sources_list_v3.py
index a8087bd1..d9ec6f74 100644
--- a/tests/unittests/config/test_apt_configure_sources_list_v3.py
+++ b/tests/unittests/config/test_apt_configure_sources_list_v3.py
@@ -3,20 +3,18 @@
 """ test_apt_custom_sources_list
 Test templating of custom sources list
 """
-from contextlib import ExitStack
 import logging
 import os
 import shutil
 import tempfile
+from contextlib import ExitStack
 from unittest import mock
 from unittest.mock import call
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from cloudinit.config import cc_apt_configure
 from cloudinit.distros.debian import Distro
 from tests.unittests import helpers as t_help
-
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -65,30 +63,31 @@ deb http://test.ubuntu.com/ubuntu/ notouched-updates main restricted
 deb http://testsec.ubuntu.com/ubuntu/ notouched-security main restricted
 """
 
-EXPECTED_BASE_CONTENT = ("""
+EXPECTED_BASE_CONTENT = """
 deb http://test.ubuntu.com/ubuntu/ notouched main restricted
 deb-src http://test.ubuntu.com/ubuntu/ notouched main restricted
 deb http://test.ubuntu.com/ubuntu/ notouched-updates main restricted
 deb http://testsec.ubuntu.com/ubuntu/ notouched-security main restricted
-""")
+"""
 
-EXPECTED_MIRROR_CONTENT = ("""
+EXPECTED_MIRROR_CONTENT = """
 deb http://test.ubuntu.com/ubuntu/ notouched main restricted
 deb-src http://test.ubuntu.com/ubuntu/ notouched main restricted
 deb http://test.ubuntu.com/ubuntu/ notouched-updates main restricted
 deb http://test.ubuntu.com/ubuntu/ notouched-security main restricted
-""")
+"""
 
-EXPECTED_PRIMSEC_CONTENT = ("""
+EXPECTED_PRIMSEC_CONTENT = """
 deb http://test.ubuntu.com/ubuntu/ notouched main restricted
 deb-src http://test.ubuntu.com/ubuntu/ notouched main restricted
 deb http://test.ubuntu.com/ubuntu/ notouched-updates main restricted
 deb http://testsec.ubuntu.com/ubuntu/ notouched-security main restricted
-""")
+"""
 
 
 class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
     """TestAptSourceConfigSourceList - Class to test sources list rendering"""
+
     def setUp(self):
         super(TestAptSourceConfigSourceList, self).setUp()
         self.subp = subp.subp
@@ -97,33 +96,39 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
 
         rpatcher = mock.patch("cloudinit.util.lsb_release")
         get_rel = rpatcher.start()
-        get_rel.return_value = {'codename': "fakerel"}
+        get_rel.return_value = {"codename": "fakerel"}
         self.addCleanup(rpatcher.stop)
         apatcher = mock.patch("cloudinit.util.get_dpkg_architecture")
         get_arch = apatcher.start()
-        get_arch.return_value = 'amd64'
+        get_arch.return_value = "amd64"
         self.addCleanup(apatcher.stop)
 
     def _apt_source_list(self, distro, cfg, cfg_on_empty=False):
         """_apt_source_list - Test rendering from template (generic)"""
         # entry at top level now, wrap in 'apt' key
-        cfg = {'apt': cfg}
+        cfg = {"apt": cfg}
         mycloud = get_cloud(distro)
 
         with ExitStack() as stack:
-            mock_writefile = stack.enter_context(mock.patch.object(
-                util, 'write_file'))
-            mock_loadfile = stack.enter_context(mock.patch.object(
-                util, 'load_file', return_value=MOCKED_APT_SRC_LIST))
-            mock_isfile = stack.enter_context(mock.patch.object(
-                os.path, 'isfile', return_value=True))
-            stack.enter_context(mock.patch.object(
-                util, 'del_file'))
-            cfg_func = ('cloudinit.config.cc_apt_configure.'
-                        '_should_configure_on_empty_apt')
-            mock_shouldcfg = stack.enter_context(mock.patch(
-                cfg_func, return_value=(cfg_on_empty, 'test')
-            ))
+            mock_writefile = stack.enter_context(
+                mock.patch.object(util, "write_file")
+            )
+            mock_loadfile = stack.enter_context(
+                mock.patch.object(
+                    util, "load_file", return_value=MOCKED_APT_SRC_LIST
+                )
+            )
+            mock_isfile = stack.enter_context(
+                mock.patch.object(os.path, "isfile", return_value=True)
+            )
+            stack.enter_context(mock.patch.object(util, "del_file"))
+            cfg_func = (
+                "cloudinit.config.cc_apt_configure."
+                "_should_configure_on_empty_apt"
+            )
+            mock_shouldcfg = stack.enter_context(
+                mock.patch(cfg_func, return_value=(cfg_on_empty, "test"))
+            )
             cc_apt_configure.handle("test", cfg, mycloud, LOG, None)
 
             return mock_writefile, mock_loadfile, mock_isfile, mock_shouldcfg
@@ -131,15 +136,20 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
     def test_apt_v3_source_list_debian(self):
         """test_apt_v3_source_list_debian - without custom sources or parms"""
         cfg = {}
-        distro = 'debian'
+        distro = "debian"
         expected = EXPECTED_BASE_CONTENT
 
-        mock_writefile, mock_load_file, mock_isfile, mock_shouldcfg = (
-            self._apt_source_list(distro, cfg, cfg_on_empty=True))
-
-        template = '/etc/cloud/templates/sources.list.%s.tmpl' % distro
-        mock_writefile.assert_called_once_with('/etc/apt/sources.list',
-                                               expected, mode=0o644)
+        (
+            mock_writefile,
+            mock_load_file,
+            mock_isfile,
+            mock_shouldcfg,
+        ) = self._apt_source_list(distro, cfg, cfg_on_empty=True)
+
+        template = "/etc/cloud/templates/sources.list.%s.tmpl" % distro
+        mock_writefile.assert_called_once_with(
+            "/etc/apt/sources.list", expected, mode=0o644
+        )
         mock_load_file.assert_called_with(template)
         mock_isfile.assert_any_call(template)
         self.assertEqual(1, mock_shouldcfg.call_count)
@@ -147,15 +157,20 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
     def test_apt_v3_source_list_ubuntu(self):
         """test_apt_v3_source_list_ubuntu - without custom sources or parms"""
         cfg = {}
-        distro = 'ubuntu'
+        distro = "ubuntu"
         expected = EXPECTED_BASE_CONTENT
 
-        mock_writefile, mock_load_file, mock_isfile, mock_shouldcfg = (
-            self._apt_source_list(distro, cfg, cfg_on_empty=True))
-
-        template = '/etc/cloud/templates/sources.list.%s.tmpl' % distro
-        mock_writefile.assert_called_once_with('/etc/apt/sources.list',
-                                               expected, mode=0o644)
+        (
+            mock_writefile,
+            mock_load_file,
+            mock_isfile,
+            mock_shouldcfg,
+        ) = self._apt_source_list(distro, cfg, cfg_on_empty=True)
+
+        template = "/etc/cloud/templates/sources.list.%s.tmpl" % distro
+        mock_writefile.assert_called_once_with(
+            "/etc/apt/sources.list", expected, mode=0o644
+        )
         mock_load_file.assert_called_with(template)
         mock_isfile.assert_any_call(template)
         self.assertEqual(1, mock_shouldcfg.call_count)
@@ -163,12 +178,13 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
     def test_apt_v3_source_list_ubuntu_snappy(self):
         """test_apt_v3_source_list_ubuntu_snappy - without custom sources or
         parms"""
-        cfg = {'apt': {}}
+        cfg = {"apt": {}}
         mycloud = get_cloud()
 
-        with mock.patch.object(util, 'write_file') as mock_writefile:
-            with mock.patch.object(util, 'system_is_snappy',
-                                   return_value=True) as mock_issnappy:
+        with mock.patch.object(util, "write_file") as mock_writefile:
+            with mock.patch.object(
+                util, "system_is_snappy", return_value=True
+            ) as mock_issnappy:
                 cc_apt_configure.handle("test", cfg, mycloud, LOG, None)
 
         self.assertEqual(0, mock_writefile.call_count)
@@ -177,7 +193,7 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
     def test_apt_v3_source_list_centos(self):
         """test_apt_v3_source_list_centos - without custom sources or parms"""
         cfg = {}
-        distro = 'rhel'
+        distro = "rhel"
 
         mock_writefile, _, _, _ = self._apt_source_list(distro, cfg)
 
@@ -185,22 +201,24 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
 
     def test_apt_v3_source_list_psm(self):
         """test_apt_v3_source_list_psm - Test specifying prim+sec mirrors"""
-        pm = 'http://test.ubuntu.com/ubuntu/'
-        sm = 'http://testsec.ubuntu.com/ubuntu/'
-        cfg = {'preserve_sources_list': False,
-               'primary': [{'arches': ["default"],
-                            'uri': pm}],
-               'security': [{'arches': ["default"],
-                             'uri': sm}]}
-        distro = 'ubuntu'
+        pm = "http://test.ubuntu.com/ubuntu/"
+        sm = "http://testsec.ubuntu.com/ubuntu/"
+        cfg = {
+            "preserve_sources_list": False,
+            "primary": [{"arches": ["default"], "uri": pm}],
+            "security": [{"arches": ["default"], "uri": sm}],
+        }
+        distro = "ubuntu"
         expected = EXPECTED_PRIMSEC_CONTENT
 
-        mock_writefile, mock_load_file, mock_isfile, _ = (
-            self._apt_source_list(distro, cfg, cfg_on_empty=True))
+        mock_writefile, mock_load_file, mock_isfile, _ = self._apt_source_list(
+            distro, cfg, cfg_on_empty=True
+        )
 
-        template = '/etc/cloud/templates/sources.list.%s.tmpl' % distro
-        mock_writefile.assert_called_once_with('/etc/apt/sources.list',
-                                               expected, mode=0o644)
+        template = "/etc/cloud/templates/sources.list.%s.tmpl" % distro
+        mock_writefile.assert_called_once_with(
+            "/etc/apt/sources.list", expected, mode=0o644
+        )
         mock_load_file.assert_called_with(template)
         mock_isfile.assert_any_call(template)
 
@@ -210,16 +228,20 @@ class TestAptSourceConfigSourceList(t_help.FilesystemMockingTestCase):
         mycloud = get_cloud()
 
         # the second mock restores the original subp
-        with mock.patch.object(util, 'write_file') as mockwrite:
-            with mock.patch.object(subp, 'subp', self.subp):
-                with mock.patch.object(Distro, 'get_primary_arch',
-                                       return_value='amd64'):
-                    cc_apt_configure.handle("notimportant", cfg, mycloud,
-                                            LOG, None)
-
-        calls = [call('/etc/apt/sources.list',
-                      EXPECTED_CONVERTED_CONTENT,
-                      mode=0o644)]
+        with mock.patch.object(util, "write_file") as mockwrite:
+            with mock.patch.object(subp, "subp", self.subp):
+                with mock.patch.object(
+                    Distro, "get_primary_arch", return_value="amd64"
+                ):
+                    cc_apt_configure.handle(
+                        "notimportant", cfg, mycloud, LOG, None
+                    )
+
+        calls = [
+            call(
+                "/etc/apt/sources.list", EXPECTED_CONVERTED_CONTENT, mode=0o644
+            )
+        ]
         mockwrite.assert_has_calls(calls)
 
 
diff --git a/tests/unittests/config/test_apt_key.py b/tests/unittests/config/test_apt_key.py
index 00e5a38d..9fcf3039 100644
--- a/tests/unittests/config/test_apt_key.py
+++ b/tests/unittests/config/test_apt_key.py
@@ -1,11 +1,10 @@
 import os
 from unittest import mock
 
+from cloudinit import subp, util
 from cloudinit.config import cc_apt_configure
-from cloudinit import subp
-from cloudinit import util
 
-TEST_KEY_HUMAN = '''
+TEST_KEY_HUMAN = """
 /etc/apt/cloud-init.gpg.d/my_key.gpg
 --------------------------------------------
 pub   rsa4096 2021-10-22 [SC]
@@ -13,9 +12,9 @@ pub   rsa4096 2021-10-22 [SC]
 uid           [ unknown] Brett Holman <brett.holman@canonical.com>
 sub   rsa4096 2021-10-22 [A]
 sub   rsa4096 2021-10-22 [E]
-'''
+"""
 
-TEST_KEY_MACHINE = '''
+TEST_KEY_MACHINE = """
 tru::1:1635129362:0:3:1:5
 pub:-:4096:1:F83F77129A5EBD85:1634912922:::-:::scESCA::::::23::0:
 fpr:::::::::3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85:
@@ -25,113 +24,101 @@ sub:-:4096:1:544B39C9A9141F04:1634912922::::::a::::::23:
 fpr:::::::::8BD901490D6EC986D03D6F0D544B39C9A9141F04:
 sub:-:4096:1:F45D9443F0A87092:1634912922::::::e::::::23:
 fpr:::::::::8CCCB332317324F030A45B19F45D9443F0A87092:
-'''
+"""
 
-TEST_KEY_FINGERPRINT_HUMAN = \
-    '3A3E F34D FDED B3B7 F3FD  F603 F83F 7712 9A5E BD85'
+TEST_KEY_FINGERPRINT_HUMAN = (
+    "3A3E F34D FDED B3B7 F3FD  F603 F83F 7712 9A5E BD85"
+)
 
-TEST_KEY_FINGERPRINT_MACHINE = \
-    '3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85'
+TEST_KEY_FINGERPRINT_MACHINE = "3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85"
 
 
 class TestAptKey:
     """TestAptKey
     Class to test apt-key commands
     """
-    @mock.patch.object(subp, 'subp', return_value=('fakekey', ''))
-    @mock.patch.object(util, 'write_file')
+
+    @mock.patch.object(subp, "subp", return_value=("fakekey", ""))
+    @mock.patch.object(util, "write_file")
     def _apt_key_add_success_helper(self, directory, *args, hardened=False):
         file = cc_apt_configure.apt_key(
-            'add',
-            output_file='my-key',
-            data='fakekey',
-            hardened=hardened)
-        assert file == directory + '/my-key.gpg'
+            "add", output_file="my-key", data="fakekey", hardened=hardened
+        )
+        assert file == directory + "/my-key.gpg"
 
     def test_apt_key_add_success(self):
-        """Verify the correct directory path gets returned for unhardened case
-        """
-        self._apt_key_add_success_helper('/etc/apt/trusted.gpg.d')
+        """Verify the right directory path gets returned for unhardened case"""
+        self._apt_key_add_success_helper("/etc/apt/trusted.gpg.d")
 
     def test_apt_key_add_success_hardened(self):
-        """Verify the correct directory path gets returned for hardened case
-        """
+        """Verify the right directory path gets returned for hardened case"""
         self._apt_key_add_success_helper(
-            '/etc/apt/cloud-init.gpg.d',
-            hardened=True)
+            "/etc/apt/cloud-init.gpg.d", hardened=True
+        )
 
     def test_apt_key_add_fail_no_file_name(self):
-        """Verify that null filename gets handled correctly
-        """
-        file = cc_apt_configure.apt_key(
-            'add',
-            output_file=None,
-            data='')
-        assert '/dev/null' == file
+        """Verify that null filename gets handled correctly"""
+        file = cc_apt_configure.apt_key("add", output_file=None, data="")
+        assert "/dev/null" == file
 
     def _apt_key_fail_helper(self):
         file = cc_apt_configure.apt_key(
-            'add',
-            output_file='my-key',
-            data='fakekey')
-        assert file == '/dev/null'
+            "add", output_file="my-key", data="fakekey"
+        )
+        assert file == "/dev/null"
 
-    @mock.patch.object(subp, 'subp', side_effect=subp.ProcessExecutionError)
+    @mock.patch.object(subp, "subp", side_effect=subp.ProcessExecutionError)
     def test_apt_key_add_fail_no_file_name_subproc(self, *args):
-        """Verify that bad key value gets handled correctly
-        """
+        """Verify that bad key value gets handled correctly"""
         self._apt_key_fail_helper()
 
     @mock.patch.object(
-        subp, 'subp', side_effect=UnicodeDecodeError('test', b'', 1, 1, ''))
+        subp, "subp", side_effect=UnicodeDecodeError("test", b"", 1, 1, "")
+    )
     def test_apt_key_add_fail_no_file_name_unicode(self, *args):
-        """Verify that bad key encoding gets handled correctly
-        """
+        """Verify that bad key encoding gets handled correctly"""
         self._apt_key_fail_helper()
 
     def _apt_key_list_success_helper(self, finger, key, human_output=True):
-        @mock.patch.object(os, 'listdir', return_value=('/fake/dir/key.gpg',))
-        @mock.patch.object(subp, 'subp', return_value=(key, ''))
+        @mock.patch.object(os, "listdir", return_value=("/fake/dir/key.gpg",))
+        @mock.patch.object(subp, "subp", return_value=(key, ""))
         def mocked_list(*a):
 
-            keys = cc_apt_configure.apt_key('list', human_output)
+            keys = cc_apt_configure.apt_key("list", human_output)
             assert finger in keys
+
         mocked_list()
 
     def test_apt_key_list_success_human(self):
-        """Verify expected key output, human
-        """
+        """Verify expected key output, human"""
         self._apt_key_list_success_helper(
-            TEST_KEY_FINGERPRINT_HUMAN,
-            TEST_KEY_HUMAN)
+            TEST_KEY_FINGERPRINT_HUMAN, TEST_KEY_HUMAN
+        )
 
     def test_apt_key_list_success_machine(self):
-        """Verify expected key output, machine
-        """
+        """Verify expected key output, machine"""
         self._apt_key_list_success_helper(
-            TEST_KEY_FINGERPRINT_MACHINE,
-            TEST_KEY_MACHINE, human_output=False)
+            TEST_KEY_FINGERPRINT_MACHINE, TEST_KEY_MACHINE, human_output=False
+        )
 
-    @mock.patch.object(os, 'listdir', return_value=())
-    @mock.patch.object(subp, 'subp', return_value=('', ''))
+    @mock.patch.object(os, "listdir", return_value=())
+    @mock.patch.object(subp, "subp", return_value=("", ""))
     def test_apt_key_list_fail_no_keys(self, *args):
-        """Ensure falsy output for no keys
-        """
-        keys = cc_apt_configure.apt_key('list')
+        """Ensure falsy output for no keys"""
+        keys = cc_apt_configure.apt_key("list")
         assert not keys
 
-    @mock.patch.object(os, 'listdir', return_value=('file_not_gpg_key.txt'))
-    @mock.patch.object(subp, 'subp', return_value=('', ''))
+    @mock.patch.object(os, "listdir", return_value="file_not_gpg_key.txt")
+    @mock.patch.object(subp, "subp", return_value=("", ""))
     def test_apt_key_list_fail_no_keys_file(self, *args):
         """Ensure non-gpg file is not returned.
 
         apt-key used file extensions for this, so we do too
         """
-        assert not cc_apt_configure.apt_key('list')
+        assert not cc_apt_configure.apt_key("list")
 
-    @mock.patch.object(subp, 'subp', side_effect=subp.ProcessExecutionError)
-    @mock.patch.object(os, 'listdir', return_value=('bad_gpg_key.gpg'))
+    @mock.patch.object(subp, "subp", side_effect=subp.ProcessExecutionError)
+    @mock.patch.object(os, "listdir", return_value="bad_gpg_key.gpg")
     def test_apt_key_list_fail_bad_key_file(self, *args):
-        """Ensure bad gpg key doesn't throw exeption.
-        """
-        assert not cc_apt_configure.apt_key('list')
+        """Ensure bad gpg key doesn't throw exeption."""
+        assert not cc_apt_configure.apt_key("list")
diff --git a/tests/unittests/config/test_apt_source_v1.py b/tests/unittests/config/test_apt_source_v1.py
index 684c2495..fbc2bf45 100644
--- a/tests/unittests/config/test_apt_source_v1.py
+++ b/tests/unittests/config/test_apt_source_v1.py
@@ -6,18 +6,15 @@ This calls all things with v1 format to stress the conversion code on top of
 the actually tested code.
 """
 import os
+import pathlib
 import re
 import shutil
 import tempfile
-import pathlib
 from unittest import mock
 from unittest.mock import call
 
+from cloudinit import gpg, subp, util
 from cloudinit.config import cc_apt_configure
-from cloudinit import gpg
-from cloudinit import subp
-from cloudinit import util
-
 from tests.unittests.helpers import TestCase
 
 EXPECTEDKEY = """-----BEGIN PGP PUBLIC KEY BLOCK-----
@@ -39,6 +36,7 @@ ADD_APT_REPO_MATCH = r"^[\w-]+:\w"
 
 class FakeDistro(object):
     """Fake Distro helper object"""
+
     def update_package_sources(self):
         """Fake update_package_sources helper method"""
         return
@@ -46,12 +44,14 @@ class FakeDistro(object):
 
 class FakeDatasource:
     """Fake Datasource helper object"""
+
     def __init__(self):
-        self.region = 'region'
+        self.region = "region"
 
 
 class FakeCloud(object):
     """Fake Cloud helper object"""
+
     def __init__(self):
         self.distro = FakeDistro()
         self.datasource = FakeDatasource()
@@ -61,6 +61,7 @@ class TestAptSourceConfig(TestCase):
     """TestAptSourceConfig
     Main Class to test apt_source configs
     """
+
     release = "fantastic"
 
     def setUp(self):
@@ -73,18 +74,19 @@ class TestAptSourceConfig(TestCase):
         self.join = os.path.join
         self.matcher = re.compile(ADD_APT_REPO_MATCH).search
         # mock fallback filename into writable tmp dir
-        self.fallbackfn = os.path.join(self.tmp, "etc/apt/sources.list.d/",
-                                       "cloud_config_sources.list")
+        self.fallbackfn = os.path.join(
+            self.tmp, "etc/apt/sources.list.d/", "cloud_config_sources.list"
+        )
 
         self.fakecloud = FakeCloud()
 
         rpatcher = mock.patch("cloudinit.util.lsb_release")
         get_rel = rpatcher.start()
-        get_rel.return_value = {'codename': self.release}
+        get_rel.return_value = {"codename": self.release}
         self.addCleanup(rpatcher.stop)
         apatcher = mock.patch("cloudinit.util.get_dpkg_architecture")
         get_arch = apatcher.start()
-        get_arch.return_value = 'amd64'
+        get_arch.return_value = "amd64"
         self.addCleanup(apatcher.stop)
 
     def _get_default_params(self):
@@ -92,23 +94,27 @@ class TestAptSourceConfig(TestCase):
         Get the most basic default mrror and release info to be used in tests
         """
         params = {}
-        params['RELEASE'] = self.release
-        params['MIRROR'] = "http://archive.ubuntu.com/ubuntu"
+        params["RELEASE"] = self.release
+        params["MIRROR"] = "http://archive.ubuntu.com/ubuntu"
         return params
 
     def wrapv1conf(self, cfg):
         params = self._get_default_params()
         # old v1 list format under old keys, but callabe to main handler
         # disable source.list rendering and set mirror to avoid other code
-        return {'apt_preserve_sources_list': True,
-                'apt_mirror': params['MIRROR'],
-                'apt_sources': cfg}
+        return {
+            "apt_preserve_sources_list": True,
+            "apt_mirror": params["MIRROR"],
+            "apt_sources": cfg,
+        }
 
     def myjoin(self, *args, **kwargs):
         """myjoin - redir into writable tmpdir"""
-        if (args[0] == "/etc/apt/sources.list.d/" and
-                args[1] == "cloud_config_sources.list" and
-                len(args) == 2):
+        if (
+            args[0] == "/etc/apt/sources.list.d/"
+            and args[1] == "cloud_config_sources.list"
+            and len(args) == 2
+        ):
             return self.join(self.tmp, args[0].lstrip("/"), args[1])
         else:
             return self.join(*args, **kwargs)
@@ -124,26 +130,43 @@ class TestAptSourceConfig(TestCase):
         self.assertTrue(os.path.isfile(filename))
 
         contents = util.load_file(filename)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", "http://archive.ubuntu.com/ubuntu",
-                                   "karmic-backports",
-                                   "main universe multiverse restricted"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://archive.ubuntu.com/ubuntu",
+                    "karmic-backports",
+                    "main universe multiverse restricted",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_src_basic(self):
         """Test deb source string, overwrite mirror and filename"""
-        cfg = {'source': ('deb http://archive.ubuntu.com/ubuntu'
-                          ' karmic-backports'
-                          ' main universe multiverse restricted'),
-               'filename': self.aptlistfile}
+        cfg = {
+            "source": (
+                "deb http://archive.ubuntu.com/ubuntu"
+                " karmic-backports"
+                " main universe multiverse restricted"
+            ),
+            "filename": self.aptlistfile,
+        }
         self.apt_src_basic(self.aptlistfile, [cfg])
 
     def test_apt_src_basic_dict(self):
         """Test deb source string, overwrite mirror and filename (dict)"""
-        cfg = {self.aptlistfile: {'source':
-                                  ('deb http://archive.ubuntu.com/ubuntu'
-                                   ' karmic-backports'
-                                   ' main universe multiverse restricted')}}
+        cfg = {
+            self.aptlistfile: {
+                "source": (
+                    "deb http://archive.ubuntu.com/ubuntu"
+                    " karmic-backports"
+                    " main universe multiverse restricted"
+                )
+            }
+        }
         self.apt_src_basic(self.aptlistfile, cfg)
 
     def apt_src_basic_tri(self, cfg):
@@ -156,56 +179,99 @@ class TestAptSourceConfig(TestCase):
 
         # extra verify on two extra files of this test
         contents = util.load_file(self.aptlistfile2)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", "http://archive.ubuntu.com/ubuntu",
-                                   "precise-backports",
-                                   "main universe multiverse restricted"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://archive.ubuntu.com/ubuntu",
+                    "precise-backports",
+                    "main universe multiverse restricted",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
         contents = util.load_file(self.aptlistfile3)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", "http://archive.ubuntu.com/ubuntu",
-                                   "lucid-backports",
-                                   "main universe multiverse restricted"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://archive.ubuntu.com/ubuntu",
+                    "lucid-backports",
+                    "main universe multiverse restricted",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_src_basic_tri(self):
         """Test Fix three deb source string with filenames"""
-        cfg1 = {'source': ('deb http://archive.ubuntu.com/ubuntu'
-                           ' karmic-backports'
-                           ' main universe multiverse restricted'),
-                'filename': self.aptlistfile}
-        cfg2 = {'source': ('deb http://archive.ubuntu.com/ubuntu'
-                           ' precise-backports'
-                           ' main universe multiverse restricted'),
-                'filename': self.aptlistfile2}
-        cfg3 = {'source': ('deb http://archive.ubuntu.com/ubuntu'
-                           ' lucid-backports'
-                           ' main universe multiverse restricted'),
-                'filename': self.aptlistfile3}
+        cfg1 = {
+            "source": (
+                "deb http://archive.ubuntu.com/ubuntu"
+                " karmic-backports"
+                " main universe multiverse restricted"
+            ),
+            "filename": self.aptlistfile,
+        }
+        cfg2 = {
+            "source": (
+                "deb http://archive.ubuntu.com/ubuntu"
+                " precise-backports"
+                " main universe multiverse restricted"
+            ),
+            "filename": self.aptlistfile2,
+        }
+        cfg3 = {
+            "source": (
+                "deb http://archive.ubuntu.com/ubuntu"
+                " lucid-backports"
+                " main universe multiverse restricted"
+            ),
+            "filename": self.aptlistfile3,
+        }
         self.apt_src_basic_tri([cfg1, cfg2, cfg3])
 
     def test_apt_src_basic_dict_tri(self):
         """Test Fix three deb source string with filenames (dict)"""
-        cfg = {self.aptlistfile: {'source':
-                                  ('deb http://archive.ubuntu.com/ubuntu'
-                                   ' karmic-backports'
-                                   ' main universe multiverse restricted')},
-               self.aptlistfile2: {'source':
-                                   ('deb http://archive.ubuntu.com/ubuntu'
-                                    ' precise-backports'
-                                    ' main universe multiverse restricted')},
-               self.aptlistfile3: {'source':
-                                   ('deb http://archive.ubuntu.com/ubuntu'
-                                    ' lucid-backports'
-                                    ' main universe multiverse restricted')}}
+        cfg = {
+            self.aptlistfile: {
+                "source": (
+                    "deb http://archive.ubuntu.com/ubuntu"
+                    " karmic-backports"
+                    " main universe multiverse restricted"
+                )
+            },
+            self.aptlistfile2: {
+                "source": (
+                    "deb http://archive.ubuntu.com/ubuntu"
+                    " precise-backports"
+                    " main universe multiverse restricted"
+                )
+            },
+            self.aptlistfile3: {
+                "source": (
+                    "deb http://archive.ubuntu.com/ubuntu"
+                    " lucid-backports"
+                    " main universe multiverse restricted"
+                )
+            },
+        }
         self.apt_src_basic_tri(cfg)
 
     def test_apt_src_basic_nofn(self):
         """Test Fix three deb source string without filenames (dict)"""
-        cfg = {'source': ('deb http://archive.ubuntu.com/ubuntu'
-                          ' karmic-backports'
-                          ' main universe multiverse restricted')}
-        with mock.patch.object(os.path, 'join', side_effect=self.myjoin):
+        cfg = {
+            "source": (
+                "deb http://archive.ubuntu.com/ubuntu"
+                " karmic-backports"
+                " main universe multiverse restricted"
+            )
+        }
+        with mock.patch.object(os.path, "join", side_effect=self.myjoin):
             self.apt_src_basic(self.fallbackfn, [cfg])
 
     def apt_src_replacement(self, filename, cfg):
@@ -219,15 +285,21 @@ class TestAptSourceConfig(TestCase):
         self.assertTrue(os.path.isfile(filename))
 
         contents = util.load_file(filename)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", params['MIRROR'], params['RELEASE'],
-                                   "multiverse"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % ("deb", params["MIRROR"], params["RELEASE"], "multiverse"),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_src_replace(self):
         """Test Autoreplacement of MIRROR and RELEASE in source specs"""
-        cfg = {'source': 'deb $MIRROR $RELEASE multiverse',
-               'filename': self.aptlistfile}
+        cfg = {
+            "source": "deb $MIRROR $RELEASE multiverse",
+            "filename": self.aptlistfile,
+        }
         self.apt_src_replacement(self.aptlistfile, [cfg])
 
     def apt_src_replace_tri(self, cfg):
@@ -240,38 +312,56 @@ class TestAptSourceConfig(TestCase):
         # extra verify on two extra files of this test
         params = self._get_default_params()
         contents = util.load_file(self.aptlistfile2)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", params['MIRROR'], params['RELEASE'],
-                                   "main"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % ("deb", params["MIRROR"], params["RELEASE"], "main"),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
         contents = util.load_file(self.aptlistfile3)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", params['MIRROR'], params['RELEASE'],
-                                   "universe"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % ("deb", params["MIRROR"], params["RELEASE"], "universe"),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_src_replace_tri(self):
         """Test triple Autoreplacement of MIRROR and RELEASE in source specs"""
-        cfg1 = {'source': 'deb $MIRROR $RELEASE multiverse',
-                'filename': self.aptlistfile}
-        cfg2 = {'source': 'deb $MIRROR $RELEASE main',
-                'filename': self.aptlistfile2}
-        cfg3 = {'source': 'deb $MIRROR $RELEASE universe',
-                'filename': self.aptlistfile3}
+        cfg1 = {
+            "source": "deb $MIRROR $RELEASE multiverse",
+            "filename": self.aptlistfile,
+        }
+        cfg2 = {
+            "source": "deb $MIRROR $RELEASE main",
+            "filename": self.aptlistfile2,
+        }
+        cfg3 = {
+            "source": "deb $MIRROR $RELEASE universe",
+            "filename": self.aptlistfile3,
+        }
         self.apt_src_replace_tri([cfg1, cfg2, cfg3])
 
     def test_apt_src_replace_dict_tri(self):
         """Test triple Autoreplacement in source specs (dict)"""
-        cfg = {self.aptlistfile: {'source': 'deb $MIRROR $RELEASE multiverse'},
-               'notused': {'source': 'deb $MIRROR $RELEASE main',
-                           'filename': self.aptlistfile2},
-               self.aptlistfile3: {'source': 'deb $MIRROR $RELEASE universe'}}
+        cfg = {
+            self.aptlistfile: {"source": "deb $MIRROR $RELEASE multiverse"},
+            "notused": {
+                "source": "deb $MIRROR $RELEASE main",
+                "filename": self.aptlistfile2,
+            },
+            self.aptlistfile3: {"source": "deb $MIRROR $RELEASE universe"},
+        }
         self.apt_src_replace_tri(cfg)
 
     def test_apt_src_replace_nofn(self):
         """Test Autoreplacement of MIRROR and RELEASE in source specs nofile"""
-        cfg = {'source': 'deb $MIRROR $RELEASE multiverse'}
-        with mock.patch.object(os.path, 'join', side_effect=self.myjoin):
+        cfg = {"source": "deb $MIRROR $RELEASE multiverse"}
+        with mock.patch.object(os.path, "join", side_effect=self.myjoin):
             self.apt_src_replacement(self.fallbackfn, [cfg])
 
     def apt_src_keyid(self, filename, cfg, keynum):
@@ -280,12 +370,12 @@ class TestAptSourceConfig(TestCase):
         """
         cfg = self.wrapv1conf(cfg)
 
-        with mock.patch.object(cc_apt_configure, 'add_apt_key') as mockobj:
+        with mock.patch.object(cc_apt_configure, "add_apt_key") as mockobj:
             cc_apt_configure.handle("test", cfg, self.fakecloud, None, None)
 
         # check if it added the right number of keys
         calls = []
-        sources = cfg['apt']['sources']
+        sources = cfg["apt"]["sources"]
         for src in sources:
             print(sources[src])
             calls.append(call(sources[src], None))
@@ -295,68 +385,109 @@ class TestAptSourceConfig(TestCase):
         self.assertTrue(os.path.isfile(filename))
 
         contents = util.load_file(filename)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "main"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "main",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_src_keyid(self):
         """Test specification of a source + keyid with filename being set"""
-        cfg = {'source': ('deb '
-                          'http://ppa.launchpad.net/'
-                          'smoser/cloud-init-test/ubuntu'
-                          ' xenial main'),
-               'keyid': "03683F77",
-               'filename': self.aptlistfile}
+        cfg = {
+            "source": (
+                "deb "
+                "http://ppa.launchpad.net/"
+                "smoser/cloud-init-test/ubuntu"
+                " xenial main"
+            ),
+            "keyid": "03683F77",
+            "filename": self.aptlistfile,
+        }
         self.apt_src_keyid(self.aptlistfile, [cfg], 1)
 
     def test_apt_src_keyid_tri(self):
         """Test 3x specification of a source + keyid with filename being set"""
-        cfg1 = {'source': ('deb '
-                           'http://ppa.launchpad.net/'
-                           'smoser/cloud-init-test/ubuntu'
-                           ' xenial main'),
-                'keyid': "03683F77",
-                'filename': self.aptlistfile}
-        cfg2 = {'source': ('deb '
-                           'http://ppa.launchpad.net/'
-                           'smoser/cloud-init-test/ubuntu'
-                           ' xenial universe'),
-                'keyid': "03683F77",
-                'filename': self.aptlistfile2}
-        cfg3 = {'source': ('deb '
-                           'http://ppa.launchpad.net/'
-                           'smoser/cloud-init-test/ubuntu'
-                           ' xenial multiverse'),
-                'keyid': "03683F77",
-                'filename': self.aptlistfile3}
+        cfg1 = {
+            "source": (
+                "deb "
+                "http://ppa.launchpad.net/"
+                "smoser/cloud-init-test/ubuntu"
+                " xenial main"
+            ),
+            "keyid": "03683F77",
+            "filename": self.aptlistfile,
+        }
+        cfg2 = {
+            "source": (
+                "deb "
+                "http://ppa.launchpad.net/"
+                "smoser/cloud-init-test/ubuntu"
+                " xenial universe"
+            ),
+            "keyid": "03683F77",
+            "filename": self.aptlistfile2,
+        }
+        cfg3 = {
+            "source": (
+                "deb "
+                "http://ppa.launchpad.net/"
+                "smoser/cloud-init-test/ubuntu"
+                " xenial multiverse"
+            ),
+            "keyid": "03683F77",
+            "filename": self.aptlistfile3,
+        }
 
         self.apt_src_keyid(self.aptlistfile, [cfg1, cfg2, cfg3], 3)
         contents = util.load_file(self.aptlistfile2)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "universe"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "universe",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
         contents = util.load_file(self.aptlistfile3)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "multiverse"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "multiverse",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_src_keyid_nofn(self):
         """Test specification of a source + keyid without filename being set"""
-        cfg = {'source': ('deb '
-                          'http://ppa.launchpad.net/'
-                          'smoser/cloud-init-test/ubuntu'
-                          ' xenial main'),
-               'keyid': "03683F77"}
-        with mock.patch.object(os.path, 'join', side_effect=self.myjoin):
+        cfg = {
+            "source": (
+                "deb "
+                "http://ppa.launchpad.net/"
+                "smoser/cloud-init-test/ubuntu"
+                " xenial main"
+            ),
+            "keyid": "03683F77",
+        }
+        with mock.patch.object(os.path, "join", side_effect=self.myjoin):
             self.apt_src_keyid(self.fallbackfn, [cfg], 1)
 
     def apt_src_key(self, filename, cfg):
@@ -365,11 +496,11 @@ class TestAptSourceConfig(TestCase):
         """
         cfg = self.wrapv1conf([cfg])
 
-        with mock.patch.object(cc_apt_configure, 'add_apt_key') as mockobj:
+        with mock.patch.object(cc_apt_configure, "add_apt_key") as mockobj:
             cc_apt_configure.handle("test", cfg, self.fakecloud, None, None)
 
         # check if it added the right amount of keys
-        sources = cfg['apt']['sources']
+        sources = cfg["apt"]["sources"]
         calls = []
         for src in sources:
             print(sources[src])
@@ -380,46 +511,63 @@ class TestAptSourceConfig(TestCase):
         self.assertTrue(os.path.isfile(filename))
 
         contents = util.load_file(filename)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "main"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "main",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_src_key(self):
         """Test specification of a source + key with filename being set"""
-        cfg = {'source': ('deb '
-                          'http://ppa.launchpad.net/'
-                          'smoser/cloud-init-test/ubuntu'
-                          ' xenial main'),
-               'key': "fakekey 4321",
-               'filename': self.aptlistfile}
+        cfg = {
+            "source": (
+                "deb "
+                "http://ppa.launchpad.net/"
+                "smoser/cloud-init-test/ubuntu"
+                " xenial main"
+            ),
+            "key": "fakekey 4321",
+            "filename": self.aptlistfile,
+        }
         self.apt_src_key(self.aptlistfile, cfg)
 
     def test_apt_src_key_nofn(self):
         """Test specification of a source + key without filename being set"""
-        cfg = {'source': ('deb '
-                          'http://ppa.launchpad.net/'
-                          'smoser/cloud-init-test/ubuntu'
-                          ' xenial main'),
-               'key': "fakekey 4321"}
-        with mock.patch.object(os.path, 'join', side_effect=self.myjoin):
+        cfg = {
+            "source": (
+                "deb "
+                "http://ppa.launchpad.net/"
+                "smoser/cloud-init-test/ubuntu"
+                " xenial main"
+            ),
+            "key": "fakekey 4321",
+        }
+        with mock.patch.object(os.path, "join", side_effect=self.myjoin):
             self.apt_src_key(self.fallbackfn, cfg)
 
     def test_apt_src_keyonly(self):
         """Test specifying key without source"""
-        cfg = {'key': "fakekey 4242",
-               'filename': self.aptlistfile}
+        cfg = {"key": "fakekey 4242", "filename": self.aptlistfile}
         cfg = self.wrapv1conf([cfg])
-        with mock.patch.object(cc_apt_configure, 'apt_key') as mockobj:
+        with mock.patch.object(cc_apt_configure, "apt_key") as mockobj:
             cc_apt_configure.handle("test", cfg, self.fakecloud, None, None)
 
-        calls = (call(
-            'add',
-            output_file=pathlib.Path(self.aptlistfile).stem,
-            data='fakekey 4242',
-            hardened=False),)
+        calls = (
+            call(
+                "add",
+                output_file=pathlib.Path(self.aptlistfile).stem,
+                data="fakekey 4242",
+                hardened=False,
+            ),
+        )
         mockobj.assert_has_calls(calls, any_order=True)
 
         # filename should be ignored on key only
@@ -427,25 +575,25 @@ class TestAptSourceConfig(TestCase):
 
     def test_apt_src_keyidonly(self):
         """Test specification of a keyid without source"""
-        cfg = {'keyid': "03683F77",
-               'filename': self.aptlistfile}
+        cfg = {"keyid": "03683F77", "filename": self.aptlistfile}
         cfg = self.wrapv1conf([cfg])
 
-        with mock.patch.object(subp, 'subp',
-                               return_value=('fakekey 1212', '')):
-            with mock.patch.object(cc_apt_configure, 'apt_key') as mockobj:
+        with mock.patch.object(
+            subp, "subp", return_value=("fakekey 1212", "")
+        ):
+            with mock.patch.object(cc_apt_configure, "apt_key") as mockobj:
                 cc_apt_configure.handle(
-                    "test",
-                    cfg,
-                    self.fakecloud,
-                    None,
-                    None)
-
-        calls = (call(
-            'add',
-            output_file=pathlib.Path(self.aptlistfile).stem,
-            data='fakekey 1212',
-            hardened=False),)
+                    "test", cfg, self.fakecloud, None, None
+                )
+
+        calls = (
+            call(
+                "add",
+                output_file=pathlib.Path(self.aptlistfile).stem,
+                data="fakekey 1212",
+                hardened=False,
+            ),
+        )
         mockobj.assert_has_calls(calls, any_order=True)
 
         # filename should be ignored on key only
@@ -457,20 +605,21 @@ class TestAptSourceConfig(TestCase):
         up to addition of the key (add_apt_key_raw mocked to keep the
         environment as is)
         """
-        key = cfg['keyid']
-        keyserver = cfg.get('keyserver', 'keyserver.ubuntu.com')
+        key = cfg["keyid"]
+        keyserver = cfg.get("keyserver", "keyserver.ubuntu.com")
         cfg = self.wrapv1conf([cfg])
 
-        with mock.patch.object(cc_apt_configure, 'add_apt_key_raw') as mockkey:
-            with mock.patch.object(gpg, 'getkeybyid',
-                                   return_value=expectedkey) as mockgetkey:
-                cc_apt_configure.handle("test", cfg, self.fakecloud,
-                                        None, None)
+        with mock.patch.object(cc_apt_configure, "add_apt_key_raw") as mockkey:
+            with mock.patch.object(
+                gpg, "getkeybyid", return_value=expectedkey
+            ) as mockgetkey:
+                cc_apt_configure.handle(
+                    "test", cfg, self.fakecloud, None, None
+                )
         if is_hardened is not None:
             mockkey.assert_called_with(
-                expectedkey,
-                self.aptlistfile,
-                hardened=is_hardened)
+                expectedkey, self.aptlistfile, hardened=is_hardened
+            )
         else:
             mockkey.assert_called_with(expectedkey, self.aptlistfile)
         mockgetkey.assert_called_with(key, keyserver)
@@ -481,62 +630,77 @@ class TestAptSourceConfig(TestCase):
     def test_apt_src_keyid_real(self):
         """test_apt_src_keyid_real - Test keyid including key add"""
         keyid = "03683F77"
-        cfg = {'keyid': keyid,
-               'filename': self.aptlistfile}
+        cfg = {"keyid": keyid, "filename": self.aptlistfile}
 
         self.apt_src_keyid_real(cfg, EXPECTEDKEY, is_hardened=False)
 
     def test_apt_src_longkeyid_real(self):
         """test_apt_src_longkeyid_real - Test long keyid including key add"""
         keyid = "B59D 5F15 97A5 04B7 E230  6DCA 0620 BBCF 0368 3F77"
-        cfg = {'keyid': keyid,
-               'filename': self.aptlistfile}
+        cfg = {"keyid": keyid, "filename": self.aptlistfile}
 
         self.apt_src_keyid_real(cfg, EXPECTEDKEY, is_hardened=False)
 
     def test_apt_src_longkeyid_ks_real(self):
         """test_apt_src_longkeyid_ks_real - Test long keyid from other ks"""
         keyid = "B59D 5F15 97A5 04B7 E230  6DCA 0620 BBCF 0368 3F77"
-        cfg = {'keyid': keyid,
-               'keyserver': 'keys.gnupg.net',
-               'filename': self.aptlistfile}
+        cfg = {
+            "keyid": keyid,
+            "keyserver": "keys.gnupg.net",
+            "filename": self.aptlistfile,
+        }
 
         self.apt_src_keyid_real(cfg, EXPECTEDKEY, is_hardened=False)
 
     def test_apt_src_ppa(self):
         """Test adding a ppa"""
-        cfg = {'source': 'ppa:smoser/cloud-init-test',
-               'filename': self.aptlistfile}
+        cfg = {
+            "source": "ppa:smoser/cloud-init-test",
+            "filename": self.aptlistfile,
+        }
         cfg = self.wrapv1conf([cfg])
 
-        with mock.patch.object(subp, 'subp') as mockobj:
+        with mock.patch.object(subp, "subp") as mockobj:
             cc_apt_configure.handle("test", cfg, self.fakecloud, None, None)
-        mockobj.assert_called_once_with(['add-apt-repository',
-                                         'ppa:smoser/cloud-init-test'],
-                                        target=None)
+        mockobj.assert_called_once_with(
+            ["add-apt-repository", "ppa:smoser/cloud-init-test"], target=None
+        )
 
         # adding ppa should ignore filename (uses add-apt-repository)
         self.assertFalse(os.path.isfile(self.aptlistfile))
 
     def test_apt_src_ppa_tri(self):
         """Test adding three ppa's"""
-        cfg1 = {'source': 'ppa:smoser/cloud-init-test',
-                'filename': self.aptlistfile}
-        cfg2 = {'source': 'ppa:smoser/cloud-init-test2',
-                'filename': self.aptlistfile2}
-        cfg3 = {'source': 'ppa:smoser/cloud-init-test3',
-                'filename': self.aptlistfile3}
+        cfg1 = {
+            "source": "ppa:smoser/cloud-init-test",
+            "filename": self.aptlistfile,
+        }
+        cfg2 = {
+            "source": "ppa:smoser/cloud-init-test2",
+            "filename": self.aptlistfile2,
+        }
+        cfg3 = {
+            "source": "ppa:smoser/cloud-init-test3",
+            "filename": self.aptlistfile3,
+        }
         cfg = self.wrapv1conf([cfg1, cfg2, cfg3])
 
-        with mock.patch.object(subp, 'subp') as mockobj:
-            cc_apt_configure.handle("test", cfg, self.fakecloud,
-                                    None, None)
-        calls = [call(['add-apt-repository', 'ppa:smoser/cloud-init-test'],
-                      target=None),
-                 call(['add-apt-repository', 'ppa:smoser/cloud-init-test2'],
-                      target=None),
-                 call(['add-apt-repository', 'ppa:smoser/cloud-init-test3'],
-                      target=None)]
+        with mock.patch.object(subp, "subp") as mockobj:
+            cc_apt_configure.handle("test", cfg, self.fakecloud, None, None)
+        calls = [
+            call(
+                ["add-apt-repository", "ppa:smoser/cloud-init-test"],
+                target=None,
+            ),
+            call(
+                ["add-apt-repository", "ppa:smoser/cloud-init-test2"],
+                target=None,
+            ),
+            call(
+                ["add-apt-repository", "ppa:smoser/cloud-init-test3"],
+                target=None,
+            ),
+        ]
         mockobj.assert_has_calls(calls, any_order=True)
 
         # adding ppa should ignore all filenames (uses add-apt-repository)
@@ -546,43 +710,59 @@ class TestAptSourceConfig(TestCase):
 
     def test_convert_to_new_format(self):
         """Test the conversion of old to new format"""
-        cfg1 = {'source': 'deb $MIRROR $RELEASE multiverse',
-                'filename': self.aptlistfile}
-        cfg2 = {'source': 'deb $MIRROR $RELEASE main',
-                'filename': self.aptlistfile2}
-        cfg3 = {'source': 'deb $MIRROR $RELEASE universe',
-                'filename': self.aptlistfile3}
-        cfg = {'apt_sources': [cfg1, cfg2, cfg3]}
-        checkcfg = {self.aptlistfile: {'filename': self.aptlistfile,
-                                       'source': 'deb $MIRROR $RELEASE '
-                                                 'multiverse'},
-                    self.aptlistfile2: {'filename': self.aptlistfile2,
-                                        'source': 'deb $MIRROR $RELEASE main'},
-                    self.aptlistfile3: {'filename': self.aptlistfile3,
-                                        'source': 'deb $MIRROR $RELEASE '
-                                                  'universe'}}
+        cfg1 = {
+            "source": "deb $MIRROR $RELEASE multiverse",
+            "filename": self.aptlistfile,
+        }
+        cfg2 = {
+            "source": "deb $MIRROR $RELEASE main",
+            "filename": self.aptlistfile2,
+        }
+        cfg3 = {
+            "source": "deb $MIRROR $RELEASE universe",
+            "filename": self.aptlistfile3,
+        }
+        cfg = {"apt_sources": [cfg1, cfg2, cfg3]}
+        checkcfg = {
+            self.aptlistfile: {
+                "filename": self.aptlistfile,
+                "source": "deb $MIRROR $RELEASE multiverse",
+            },
+            self.aptlistfile2: {
+                "filename": self.aptlistfile2,
+                "source": "deb $MIRROR $RELEASE main",
+            },
+            self.aptlistfile3: {
+                "filename": self.aptlistfile3,
+                "source": "deb $MIRROR $RELEASE universe",
+            },
+        }
 
         newcfg = cc_apt_configure.convert_to_v3_apt_format(cfg)
-        self.assertEqual(newcfg['apt']['sources'], checkcfg)
+        self.assertEqual(newcfg["apt"]["sources"], checkcfg)
 
         # convert again, should stay the same
         newcfg2 = cc_apt_configure.convert_to_v3_apt_format(newcfg)
-        self.assertEqual(newcfg2['apt']['sources'], checkcfg)
+        self.assertEqual(newcfg2["apt"]["sources"], checkcfg)
 
         # should work without raising an exception
         cc_apt_configure.convert_to_v3_apt_format({})
 
         with self.assertRaises(ValueError):
-            cc_apt_configure.convert_to_v3_apt_format({'apt_sources': 5})
+            cc_apt_configure.convert_to_v3_apt_format({"apt_sources": 5})
 
     def test_convert_to_new_format_collision(self):
         """Test the conversion of old to new format with collisions
-           That matches e.g. the MAAS case specifying old and new config"""
-        cfg_1_and_3 = {'apt': {'proxy': 'http://192.168.122.1:8000/'},
-                       'apt_proxy': 'http://192.168.122.1:8000/'}
-        cfg_3_only = {'apt': {'proxy': 'http://192.168.122.1:8000/'}}
-        cfgconflict = {'apt': {'proxy': 'http://192.168.122.1:8000/'},
-                       'apt_proxy': 'ftp://192.168.122.1:8000/'}
+        That matches e.g. the MAAS case specifying old and new config"""
+        cfg_1_and_3 = {
+            "apt": {"proxy": "http://192.168.122.1:8000/"},
+            "apt_proxy": "http://192.168.122.1:8000/",
+        }
+        cfg_3_only = {"apt": {"proxy": "http://192.168.122.1:8000/"}}
+        cfgconflict = {
+            "apt": {"proxy": "http://192.168.122.1:8000/"},
+            "apt_proxy": "ftp://192.168.122.1:8000/",
+        }
 
         # collision (equal)
         newcfg = cc_apt_configure.convert_to_v3_apt_format(cfg_1_and_3)
@@ -596,22 +776,34 @@ class TestAptSourceConfig(TestCase):
             cc_apt_configure.convert_to_v3_apt_format(cfgconflict)
 
     def test_convert_to_new_format_dict_collision(self):
-        cfg1 = {'source': 'deb $MIRROR $RELEASE multiverse',
-                'filename': self.aptlistfile}
-        cfg2 = {'source': 'deb $MIRROR $RELEASE main',
-                'filename': self.aptlistfile2}
-        cfg3 = {'source': 'deb $MIRROR $RELEASE universe',
-                'filename': self.aptlistfile3}
-        fullv3 = {self.aptlistfile: {'filename': self.aptlistfile,
-                                     'source': 'deb $MIRROR $RELEASE '
-                                               'multiverse'},
-                  self.aptlistfile2: {'filename': self.aptlistfile2,
-                                      'source': 'deb $MIRROR $RELEASE main'},
-                  self.aptlistfile3: {'filename': self.aptlistfile3,
-                                      'source': 'deb $MIRROR $RELEASE '
-                                                'universe'}}
-        cfg_3_only = {'apt': {'sources': fullv3}}
-        cfg_1_and_3 = {'apt_sources': [cfg1, cfg2, cfg3]}
+        cfg1 = {
+            "source": "deb $MIRROR $RELEASE multiverse",
+            "filename": self.aptlistfile,
+        }
+        cfg2 = {
+            "source": "deb $MIRROR $RELEASE main",
+            "filename": self.aptlistfile2,
+        }
+        cfg3 = {
+            "source": "deb $MIRROR $RELEASE universe",
+            "filename": self.aptlistfile3,
+        }
+        fullv3 = {
+            self.aptlistfile: {
+                "filename": self.aptlistfile,
+                "source": "deb $MIRROR $RELEASE multiverse",
+            },
+            self.aptlistfile2: {
+                "filename": self.aptlistfile2,
+                "source": "deb $MIRROR $RELEASE main",
+            },
+            self.aptlistfile3: {
+                "filename": self.aptlistfile3,
+                "source": "deb $MIRROR $RELEASE universe",
+            },
+        }
+        cfg_3_only = {"apt": {"sources": fullv3}}
+        cfg_1_and_3 = {"apt_sources": [cfg1, cfg2, cfg3]}
         cfg_1_and_3.update(cfg_3_only)
 
         # collision (equal, so ok to remove)
@@ -621,27 +813,36 @@ class TestAptSourceConfig(TestCase):
         newcfg = cc_apt_configure.convert_to_v3_apt_format(cfg_3_only)
         self.assertEqual(newcfg, cfg_3_only)
 
-        diff = {self.aptlistfile: {'filename': self.aptlistfile,
-                                   'source': 'deb $MIRROR $RELEASE '
-                                             'DIFFERENTVERSE'},
-                self.aptlistfile2: {'filename': self.aptlistfile2,
-                                    'source': 'deb $MIRROR $RELEASE main'},
-                self.aptlistfile3: {'filename': self.aptlistfile3,
-                                    'source': 'deb $MIRROR $RELEASE '
-                                              'universe'}}
-        cfg_3_only = {'apt': {'sources': diff}}
-        cfg_1_and_3_different = {'apt_sources': [cfg1, cfg2, cfg3]}
+        diff = {
+            self.aptlistfile: {
+                "filename": self.aptlistfile,
+                "source": "deb $MIRROR $RELEASE DIFFERENTVERSE",
+            },
+            self.aptlistfile2: {
+                "filename": self.aptlistfile2,
+                "source": "deb $MIRROR $RELEASE main",
+            },
+            self.aptlistfile3: {
+                "filename": self.aptlistfile3,
+                "source": "deb $MIRROR $RELEASE universe",
+            },
+        }
+        cfg_3_only = {"apt": {"sources": diff}}
+        cfg_1_and_3_different = {"apt_sources": [cfg1, cfg2, cfg3]}
         cfg_1_and_3_different.update(cfg_3_only)
 
         # collision (unequal by dict having a different entry)
         with self.assertRaises(ValueError):
             cc_apt_configure.convert_to_v3_apt_format(cfg_1_and_3_different)
 
-        missing = {self.aptlistfile: {'filename': self.aptlistfile,
-                                      'source': 'deb $MIRROR $RELEASE '
-                                                'multiverse'}}
-        cfg_3_only = {'apt': {'sources': missing}}
-        cfg_1_and_3_missing = {'apt_sources': [cfg1, cfg2, cfg3]}
+        missing = {
+            self.aptlistfile: {
+                "filename": self.aptlistfile,
+                "source": "deb $MIRROR $RELEASE multiverse",
+            }
+        }
+        cfg_3_only = {"apt": {"sources": missing}}
+        cfg_1_and_3_missing = {"apt_sources": [cfg1, cfg2, cfg3]}
         cfg_1_and_3_missing.update(cfg_3_only)
         # collision (unequal by dict missing an entry)
         with self.assertRaises(ValueError):
diff --git a/tests/unittests/config/test_apt_source_v3.py b/tests/unittests/config/test_apt_source_v3.py
index 0b78037e..75adc647 100644
--- a/tests/unittests/config/test_apt_source_v3.py
+++ b/tests/unittests/config/test_apt_source_v3.py
@@ -6,21 +6,17 @@ This tries to call all in the new v3 format and cares about new features
 """
 import glob
 import os
+import pathlib
 import re
 import shutil
 import socket
 import tempfile
-import pathlib
-
 from unittest import TestCase, mock
 from unittest.mock import call
 
-from cloudinit import gpg
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import gpg, subp, util
 from cloudinit.config import cc_apt_configure
 from tests.unittests import helpers as t_help
-
 from tests.unittests.util import get_cloud
 
 EXPECTEDKEY = """-----BEGIN PGP PUBLIC KEY BLOCK-----
@@ -42,18 +38,23 @@ ADD_APT_REPO_MATCH = r"^[\w-]+:\w"
 TARGET = None
 
 MOCK_LSB_RELEASE_DATA = {
-    'id': 'Ubuntu', 'description': 'Ubuntu 18.04.1 LTS',
-    'release': '18.04', 'codename': 'bionic'}
+    "id": "Ubuntu",
+    "description": "Ubuntu 18.04.1 LTS",
+    "release": "18.04",
+    "codename": "bionic",
+}
 
 
 class FakeDatasource:
     """Fake Datasource helper object"""
+
     def __init__(self):
-        self.region = 'region'
+        self.region = "region"
 
 
 class FakeCloud:
     """Fake Cloud helper object"""
+
     def __init__(self):
         self.datasource = FakeDatasource()
 
@@ -62,6 +63,7 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
     """TestAptSourceConfig
     Main Class to test apt configs
     """
+
     def setUp(self):
         super(TestAptSourceConfig, self).setUp()
         self.tmp = tempfile.mkdtemp()
@@ -74,12 +76,14 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         self.join = os.path.join
         self.matcher = re.compile(ADD_APT_REPO_MATCH).search
         self.add_patch(
-            'cloudinit.config.cc_apt_configure.util.lsb_release',
-            'm_lsb_release', return_value=MOCK_LSB_RELEASE_DATA.copy())
+            "cloudinit.config.cc_apt_configure.util.lsb_release",
+            "m_lsb_release",
+            return_value=MOCK_LSB_RELEASE_DATA.copy(),
+        )
 
     @staticmethod
     def _add_apt_sources(*args, **kwargs):
-        with mock.patch.object(cc_apt_configure, 'update_packages'):
+        with mock.patch.object(cc_apt_configure, "update_packages"):
             cc_apt_configure.add_apt_sources(*args, **kwargs)
 
     @staticmethod
@@ -88,17 +92,20 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         Get the most basic default mrror and release info to be used in tests
         """
         params = {}
-        params['RELEASE'] = MOCK_LSB_RELEASE_DATA['release']
-        arch = 'amd64'
-        params['MIRROR'] = cc_apt_configure.\
-            get_default_mirrors(arch)["PRIMARY"]
+        params["RELEASE"] = MOCK_LSB_RELEASE_DATA["release"]
+        arch = "amd64"
+        params["MIRROR"] = cc_apt_configure.get_default_mirrors(arch)[
+            "PRIMARY"
+        ]
         return params
 
     def _myjoin(self, *args, **kwargs):
         """_myjoin - redir into writable tmpdir"""
-        if (args[0] == "/etc/apt/sources.list.d/" and
-                args[1] == "cloud_config_sources.list" and
-                len(args) == 2):
+        if (
+            args[0] == "/etc/apt/sources.list.d/"
+            and args[1] == "cloud_config_sources.list"
+            and len(args) == 2
+        ):
             return self.join(self.tmp, args[0].lstrip("/"), args[1])
         else:
             return self.join(*args, **kwargs)
@@ -109,81 +116,131 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         """
         params = self._get_default_params()
 
-        self._add_apt_sources(cfg, TARGET, template_params=params,
-                              aa_repo_match=self.matcher)
+        self._add_apt_sources(
+            cfg, TARGET, template_params=params, aa_repo_match=self.matcher
+        )
 
         self.assertTrue(os.path.isfile(filename))
 
         contents = util.load_file(filename)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", "http://test.ubuntu.com/ubuntu",
-                                   "karmic-backports",
-                                   "main universe multiverse restricted"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://test.ubuntu.com/ubuntu",
+                    "karmic-backports",
+                    "main universe multiverse restricted",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_v3_src_basic(self):
         """test_apt_v3_src_basic - Test fix deb source string"""
-        cfg = {self.aptlistfile: {'source':
-                                  ('deb http://test.ubuntu.com/ubuntu'
-                                   ' karmic-backports'
-                                   ' main universe multiverse restricted')}}
+        cfg = {
+            self.aptlistfile: {
+                "source": (
+                    "deb http://test.ubuntu.com/ubuntu"
+                    " karmic-backports"
+                    " main universe multiverse restricted"
+                )
+            }
+        }
         self._apt_src_basic(self.aptlistfile, cfg)
 
     def test_apt_v3_src_basic_tri(self):
         """test_apt_v3_src_basic_tri - Test multiple fix deb source strings"""
-        cfg = {self.aptlistfile: {'source':
-                                  ('deb http://test.ubuntu.com/ubuntu'
-                                   ' karmic-backports'
-                                   ' main universe multiverse restricted')},
-               self.aptlistfile2: {'source':
-                                   ('deb http://test.ubuntu.com/ubuntu'
-                                    ' precise-backports'
-                                    ' main universe multiverse restricted')},
-               self.aptlistfile3: {'source':
-                                   ('deb http://test.ubuntu.com/ubuntu'
-                                    ' lucid-backports'
-                                    ' main universe multiverse restricted')}}
+        cfg = {
+            self.aptlistfile: {
+                "source": (
+                    "deb http://test.ubuntu.com/ubuntu"
+                    " karmic-backports"
+                    " main universe multiverse restricted"
+                )
+            },
+            self.aptlistfile2: {
+                "source": (
+                    "deb http://test.ubuntu.com/ubuntu"
+                    " precise-backports"
+                    " main universe multiverse restricted"
+                )
+            },
+            self.aptlistfile3: {
+                "source": (
+                    "deb http://test.ubuntu.com/ubuntu"
+                    " lucid-backports"
+                    " main universe multiverse restricted"
+                )
+            },
+        }
         self._apt_src_basic(self.aptlistfile, cfg)
 
         # extra verify on two extra files of this test
         contents = util.load_file(self.aptlistfile2)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", "http://test.ubuntu.com/ubuntu",
-                                   "precise-backports",
-                                   "main universe multiverse restricted"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://test.ubuntu.com/ubuntu",
+                    "precise-backports",
+                    "main universe multiverse restricted",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
         contents = util.load_file(self.aptlistfile3)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", "http://test.ubuntu.com/ubuntu",
-                                   "lucid-backports",
-                                   "main universe multiverse restricted"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://test.ubuntu.com/ubuntu",
+                    "lucid-backports",
+                    "main universe multiverse restricted",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def _apt_src_replacement(self, filename, cfg):
         """apt_src_replace
         Test Autoreplacement of MIRROR and RELEASE in source specs
         """
         params = self._get_default_params()
-        self._add_apt_sources(cfg, TARGET, template_params=params,
-                              aa_repo_match=self.matcher)
+        self._add_apt_sources(
+            cfg, TARGET, template_params=params, aa_repo_match=self.matcher
+        )
 
         self.assertTrue(os.path.isfile(filename))
 
         contents = util.load_file(filename)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", params['MIRROR'], params['RELEASE'],
-                                   "multiverse"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % ("deb", params["MIRROR"], params["RELEASE"], "multiverse"),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_v3_src_replace(self):
         """test_apt_v3_src_replace - Test replacement of MIRROR & RELEASE"""
-        cfg = {self.aptlistfile: {'source': 'deb $MIRROR $RELEASE multiverse'}}
+        cfg = {self.aptlistfile: {"source": "deb $MIRROR $RELEASE multiverse"}}
         self._apt_src_replacement(self.aptlistfile, cfg)
 
     def test_apt_v3_src_replace_fn(self):
         """test_apt_v3_src_replace_fn - Test filename overwritten in dict"""
-        cfg = {'ignored': {'source': 'deb $MIRROR $RELEASE multiverse',
-                           'filename': self.aptlistfile}}
+        cfg = {
+            "ignored": {
+                "source": "deb $MIRROR $RELEASE multiverse",
+                "filename": self.aptlistfile,
+            }
+        }
         # second file should overwrite the dict key
         self._apt_src_replacement(self.aptlistfile, cfg)
 
@@ -197,22 +254,34 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         # extra verify on two extra files of this test
         params = self._get_default_params()
         contents = util.load_file(self.aptlistfile2)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", params['MIRROR'], params['RELEASE'],
-                                   "main"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % ("deb", params["MIRROR"], params["RELEASE"], "main"),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
         contents = util.load_file(self.aptlistfile3)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb", params['MIRROR'], params['RELEASE'],
-                                   "universe"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % ("deb", params["MIRROR"], params["RELEASE"], "universe"),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_v3_src_replace_tri(self):
         """test_apt_v3_src_replace_tri - Test multiple replace/overwrites"""
-        cfg = {self.aptlistfile: {'source': 'deb $MIRROR $RELEASE multiverse'},
-               'notused': {'source': 'deb $MIRROR $RELEASE main',
-                           'filename': self.aptlistfile2},
-               self.aptlistfile3: {'source': 'deb $MIRROR $RELEASE universe'}}
+        cfg = {
+            self.aptlistfile: {"source": "deb $MIRROR $RELEASE multiverse"},
+            "notused": {
+                "source": "deb $MIRROR $RELEASE main",
+                "filename": self.aptlistfile2,
+            },
+            self.aptlistfile3: {"source": "deb $MIRROR $RELEASE universe"},
+        }
         self._apt_src_replace_tri(cfg)
 
     def _apt_src_keyid(self, filename, cfg, keynum, is_hardened=None):
@@ -221,9 +290,10 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         """
         params = self._get_default_params()
 
-        with mock.patch.object(cc_apt_configure, 'add_apt_key') as mockobj:
-            self._add_apt_sources(cfg, TARGET, template_params=params,
-                                  aa_repo_match=self.matcher)
+        with mock.patch.object(cc_apt_configure, "add_apt_key") as mockobj:
+            self._add_apt_sources(
+                cfg, TARGET, template_params=params, aa_repo_match=self.matcher
+            )
 
         # check if it added the right number of keys
         calls = []
@@ -238,103 +308,165 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         self.assertTrue(os.path.isfile(filename))
 
         contents = util.load_file(filename)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "main"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "main",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_v3_src_keyid(self):
         """test_apt_v3_src_keyid - Test source + keyid with filename"""
-        cfg = {self.aptlistfile: {'source': ('deb '
-                                             'http://ppa.launchpad.net/'
-                                             'smoser/cloud-init-test/ubuntu'
-                                             ' xenial main'),
-                                  'filename': self.aptlistfile,
-                                  'keyid': "03683F77"}}
+        cfg = {
+            self.aptlistfile: {
+                "source": (
+                    "deb "
+                    "http://ppa.launchpad.net/"
+                    "smoser/cloud-init-test/ubuntu"
+                    " xenial main"
+                ),
+                "filename": self.aptlistfile,
+                "keyid": "03683F77",
+            }
+        }
         self._apt_src_keyid(self.aptlistfile, cfg, 1)
 
     def test_apt_v3_src_keyid_tri(self):
         """test_apt_v3_src_keyid_tri - Test multiple src+key+filen writes"""
-        cfg = {self.aptlistfile: {'source': ('deb '
-                                             'http://ppa.launchpad.net/'
-                                             'smoser/cloud-init-test/ubuntu'
-                                             ' xenial main'),
-                                  'keyid': "03683F77"},
-               'ignored': {'source': ('deb '
-                                      'http://ppa.launchpad.net/'
-                                      'smoser/cloud-init-test/ubuntu'
-                                      ' xenial universe'),
-                           'keyid': "03683F77",
-                           'filename': self.aptlistfile2},
-               self.aptlistfile3: {'source': ('deb '
-                                              'http://ppa.launchpad.net/'
-                                              'smoser/cloud-init-test/ubuntu'
-                                              ' xenial multiverse'),
-                                   'filename': self.aptlistfile3,
-                                   'keyid': "03683F77"}}
+        cfg = {
+            self.aptlistfile: {
+                "source": (
+                    "deb "
+                    "http://ppa.launchpad.net/"
+                    "smoser/cloud-init-test/ubuntu"
+                    " xenial main"
+                ),
+                "keyid": "03683F77",
+            },
+            "ignored": {
+                "source": (
+                    "deb "
+                    "http://ppa.launchpad.net/"
+                    "smoser/cloud-init-test/ubuntu"
+                    " xenial universe"
+                ),
+                "keyid": "03683F77",
+                "filename": self.aptlistfile2,
+            },
+            self.aptlistfile3: {
+                "source": (
+                    "deb "
+                    "http://ppa.launchpad.net/"
+                    "smoser/cloud-init-test/ubuntu"
+                    " xenial multiverse"
+                ),
+                "filename": self.aptlistfile3,
+                "keyid": "03683F77",
+            },
+        }
 
         self._apt_src_keyid(self.aptlistfile, cfg, 3)
         contents = util.load_file(self.aptlistfile2)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "universe"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "universe",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
         contents = util.load_file(self.aptlistfile3)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "multiverse"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "multiverse",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_v3_src_key(self):
         """test_apt_v3_src_key - Test source + key"""
         params = self._get_default_params()
-        cfg = {self.aptlistfile: {'source': ('deb '
-                                             'http://ppa.launchpad.net/'
-                                             'smoser/cloud-init-test/ubuntu'
-                                             ' xenial main'),
-                                  'filename': self.aptlistfile,
-                                  'key': "fakekey 4321"}}
-
-        with mock.patch.object(cc_apt_configure, 'apt_key') as mockobj:
-            self._add_apt_sources(cfg, TARGET, template_params=params,
-                                  aa_repo_match=self.matcher)
-
-        calls = (call(
-            'add',
-            output_file=pathlib.Path(self.aptlistfile).stem,
-            data='fakekey 4321',
-            hardened=False),)
+        cfg = {
+            self.aptlistfile: {
+                "source": (
+                    "deb "
+                    "http://ppa.launchpad.net/"
+                    "smoser/cloud-init-test/ubuntu"
+                    " xenial main"
+                ),
+                "filename": self.aptlistfile,
+                "key": "fakekey 4321",
+            }
+        }
+
+        with mock.patch.object(cc_apt_configure, "apt_key") as mockobj:
+            self._add_apt_sources(
+                cfg, TARGET, template_params=params, aa_repo_match=self.matcher
+            )
+
+        calls = (
+            call(
+                "add",
+                output_file=pathlib.Path(self.aptlistfile).stem,
+                data="fakekey 4321",
+                hardened=False,
+            ),
+        )
         mockobj.assert_has_calls(calls, any_order=True)
         self.assertTrue(os.path.isfile(self.aptlistfile))
 
         contents = util.load_file(self.aptlistfile)
-        self.assertTrue(re.search(r"%s %s %s %s\n" %
-                                  ("deb",
-                                   ('http://ppa.launchpad.net/smoser/'
-                                    'cloud-init-test/ubuntu'),
-                                   "xenial", "main"),
-                                  contents, flags=re.IGNORECASE))
+        self.assertTrue(
+            re.search(
+                r"%s %s %s %s\n"
+                % (
+                    "deb",
+                    "http://ppa.launchpad.net/smoser/cloud-init-test/ubuntu",
+                    "xenial",
+                    "main",
+                ),
+                contents,
+                flags=re.IGNORECASE,
+            )
+        )
 
     def test_apt_v3_src_keyonly(self):
         """test_apt_v3_src_keyonly - Test key without source"""
         params = self._get_default_params()
-        cfg = {self.aptlistfile: {'key': "fakekey 4242"}}
-
-        with mock.patch.object(cc_apt_configure, 'apt_key') as mockobj:
-            self._add_apt_sources(cfg, TARGET, template_params=params,
-                                  aa_repo_match=self.matcher)
-
-        calls = (call(
-            'add',
-            output_file=pathlib.Path(self.aptlistfile).stem,
-            data='fakekey 4242',
-            hardened=False),)
+        cfg = {self.aptlistfile: {"key": "fakekey 4242"}}
+
+        with mock.patch.object(cc_apt_configure, "apt_key") as mockobj:
+            self._add_apt_sources(
+                cfg, TARGET, template_params=params, aa_repo_match=self.matcher
+            )
+
+        calls = (
+            call(
+                "add",
+                output_file=pathlib.Path(self.aptlistfile).stem,
+                data="fakekey 4242",
+                hardened=False,
+            ),
+        )
         mockobj.assert_has_calls(calls, any_order=True)
 
         # filename should be ignored on key only
@@ -343,18 +475,26 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
     def test_apt_v3_src_keyidonly(self):
         """test_apt_v3_src_keyidonly - Test keyid without source"""
         params = self._get_default_params()
-        cfg = {self.aptlistfile: {'keyid': "03683F77"}}
-        with mock.patch.object(subp, 'subp',
-                               return_value=('fakekey 1212', '')):
-            with mock.patch.object(cc_apt_configure, 'apt_key') as mockobj:
-                self._add_apt_sources(cfg, TARGET, template_params=params,
-                                      aa_repo_match=self.matcher)
-
-        calls = (call(
-            'add',
-            output_file=pathlib.Path(self.aptlistfile).stem,
-            data='fakekey 1212',
-            hardened=False),)
+        cfg = {self.aptlistfile: {"keyid": "03683F77"}}
+        with mock.patch.object(
+            subp, "subp", return_value=("fakekey 1212", "")
+        ):
+            with mock.patch.object(cc_apt_configure, "apt_key") as mockobj:
+                self._add_apt_sources(
+                    cfg,
+                    TARGET,
+                    template_params=params,
+                    aa_repo_match=self.matcher,
+                )
+
+        calls = (
+            call(
+                "add",
+                output_file=pathlib.Path(self.aptlistfile).stem,
+                data="fakekey 1212",
+                hardened=False,
+            ),
+        )
         mockobj.assert_has_calls(calls, any_order=True)
 
         # filename should be ignored on key only
@@ -368,21 +508,25 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         """
         params = self._get_default_params()
 
-        with mock.patch.object(cc_apt_configure, 'add_apt_key_raw') as mockkey:
-            with mock.patch.object(gpg, 'getkeybyid',
-                                   return_value=expectedkey) as mockgetkey:
-                self._add_apt_sources(cfg, TARGET, template_params=params,
-                                      aa_repo_match=self.matcher)
+        with mock.patch.object(cc_apt_configure, "add_apt_key_raw") as mockkey:
+            with mock.patch.object(
+                gpg, "getkeybyid", return_value=expectedkey
+            ) as mockgetkey:
+                self._add_apt_sources(
+                    cfg,
+                    TARGET,
+                    template_params=params,
+                    aa_repo_match=self.matcher,
+                )
 
         keycfg = cfg[self.aptlistfile]
-        mockgetkey.assert_called_with(keycfg['keyid'],
-                                      keycfg.get('keyserver',
-                                                 'keyserver.ubuntu.com'))
+        mockgetkey.assert_called_with(
+            keycfg["keyid"], keycfg.get("keyserver", "keyserver.ubuntu.com")
+        )
         if is_hardened is not None:
             mockkey.assert_called_with(
-                expectedkey,
-                keycfg['keyfile'],
-                hardened=is_hardened)
+                expectedkey, keycfg["keyfile"], hardened=is_hardened
+            )
 
         # filename should be ignored on key only
         self.assertFalse(os.path.isfile(self.aptlistfile))
@@ -390,25 +534,27 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
     def test_apt_v3_src_keyid_real(self):
         """test_apt_v3_src_keyid_real - Test keyid including key add"""
         keyid = "03683F77"
-        cfg = {self.aptlistfile: {'keyid': keyid,
-                                  'keyfile': self.aptlistfile}}
+        cfg = {self.aptlistfile: {"keyid": keyid, "keyfile": self.aptlistfile}}
 
         self.apt_src_keyid_real(cfg, EXPECTEDKEY, is_hardened=False)
 
     def test_apt_v3_src_longkeyid_real(self):
         """test_apt_v3_src_longkeyid_real Test long keyid including key add"""
         keyid = "B59D 5F15 97A5 04B7 E230  6DCA 0620 BBCF 0368 3F77"
-        cfg = {self.aptlistfile: {'keyid': keyid,
-                                  'keyfile': self.aptlistfile}}
+        cfg = {self.aptlistfile: {"keyid": keyid, "keyfile": self.aptlistfile}}
 
         self.apt_src_keyid_real(cfg, EXPECTEDKEY, is_hardened=False)
 
     def test_apt_v3_src_longkeyid_ks_real(self):
         """test_apt_v3_src_longkeyid_ks_real Test long keyid from other ks"""
         keyid = "B59D 5F15 97A5 04B7 E230  6DCA 0620 BBCF 0368 3F77"
-        cfg = {self.aptlistfile: {'keyid': keyid,
-                                  'keyfile': self.aptlistfile,
-                                  'keyserver': 'keys.gnupg.net'}}
+        cfg = {
+            self.aptlistfile: {
+                "keyid": keyid,
+                "keyfile": self.aptlistfile,
+                "keyserver": "keys.gnupg.net",
+            }
+        }
 
         self.apt_src_keyid_real(cfg, EXPECTEDKEY)
 
@@ -416,21 +562,31 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         """test_apt_v3_src_keyid_keyserver - Test custom keyserver"""
         keyid = "03683F77"
         params = self._get_default_params()
-        cfg = {self.aptlistfile: {'keyid': keyid,
-                                  'keyfile': self.aptlistfile,
-                                  'keyserver': 'test.random.com'}}
+        cfg = {
+            self.aptlistfile: {
+                "keyid": keyid,
+                "keyfile": self.aptlistfile,
+                "keyserver": "test.random.com",
+            }
+        }
 
         # in some test environments only *.ubuntu.com is reachable
         # so mock the call and check if the config got there
-        with mock.patch.object(gpg, 'getkeybyid',
-                               return_value="fakekey") as mockgetkey:
-            with mock.patch.object(cc_apt_configure,
-                                   'add_apt_key_raw') as mockadd:
-                self._add_apt_sources(cfg, TARGET, template_params=params,
-                                      aa_repo_match=self.matcher)
-
-        mockgetkey.assert_called_with('03683F77', 'test.random.com')
-        mockadd.assert_called_with('fakekey', self.aptlistfile, hardened=False)
+        with mock.patch.object(
+            gpg, "getkeybyid", return_value="fakekey"
+        ) as mockgetkey:
+            with mock.patch.object(
+                cc_apt_configure, "add_apt_key_raw"
+            ) as mockadd:
+                self._add_apt_sources(
+                    cfg,
+                    TARGET,
+                    template_params=params,
+                    aa_repo_match=self.matcher,
+                )
+
+        mockgetkey.assert_called_with("03683F77", "test.random.com")
+        mockadd.assert_called_with("fakekey", self.aptlistfile, hardened=False)
 
         # filename should be ignored on key only
         self.assertFalse(os.path.isfile(self.aptlistfile))
@@ -438,13 +594,15 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
     def test_apt_v3_src_ppa(self):
         """test_apt_v3_src_ppa - Test specification of a ppa"""
         params = self._get_default_params()
-        cfg = {self.aptlistfile: {'source': 'ppa:smoser/cloud-init-test'}}
+        cfg = {self.aptlistfile: {"source": "ppa:smoser/cloud-init-test"}}
 
         with mock.patch("cloudinit.subp.subp") as mockobj:
-            self._add_apt_sources(cfg, TARGET, template_params=params,
-                                  aa_repo_match=self.matcher)
-        mockobj.assert_any_call(['add-apt-repository',
-                                 'ppa:smoser/cloud-init-test'], target=TARGET)
+            self._add_apt_sources(
+                cfg, TARGET, template_params=params, aa_repo_match=self.matcher
+            )
+        mockobj.assert_any_call(
+            ["add-apt-repository", "ppa:smoser/cloud-init-test"], target=TARGET
+        )
 
         # adding ppa should ignore filename (uses add-apt-repository)
         self.assertFalse(os.path.isfile(self.aptlistfile))
@@ -452,19 +610,30 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
     def test_apt_v3_src_ppa_tri(self):
         """test_apt_v3_src_ppa_tri - Test specification of multiple ppa's"""
         params = self._get_default_params()
-        cfg = {self.aptlistfile: {'source': 'ppa:smoser/cloud-init-test'},
-               self.aptlistfile2: {'source': 'ppa:smoser/cloud-init-test2'},
-               self.aptlistfile3: {'source': 'ppa:smoser/cloud-init-test3'}}
+        cfg = {
+            self.aptlistfile: {"source": "ppa:smoser/cloud-init-test"},
+            self.aptlistfile2: {"source": "ppa:smoser/cloud-init-test2"},
+            self.aptlistfile3: {"source": "ppa:smoser/cloud-init-test3"},
+        }
 
         with mock.patch("cloudinit.subp.subp") as mockobj:
-            self._add_apt_sources(cfg, TARGET, template_params=params,
-                                  aa_repo_match=self.matcher)
-        calls = [call(['add-apt-repository', 'ppa:smoser/cloud-init-test'],
-                      target=TARGET),
-                 call(['add-apt-repository', 'ppa:smoser/cloud-init-test2'],
-                      target=TARGET),
-                 call(['add-apt-repository', 'ppa:smoser/cloud-init-test3'],
-                      target=TARGET)]
+            self._add_apt_sources(
+                cfg, TARGET, template_params=params, aa_repo_match=self.matcher
+            )
+        calls = [
+            call(
+                ["add-apt-repository", "ppa:smoser/cloud-init-test"],
+                target=TARGET,
+            ),
+            call(
+                ["add-apt-repository", "ppa:smoser/cloud-init-test2"],
+                target=TARGET,
+            ),
+            call(
+                ["add-apt-repository", "ppa:smoser/cloud-init-test3"],
+                target=TARGET,
+            ),
+        ]
         mockobj.assert_has_calls(calls, any_order=True)
 
         # adding ppa should ignore all filenames (uses add-apt-repository)
@@ -478,34 +647,46 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         pre = "/var/lib/apt/lists"
         # filenames are archive dependent
 
-        arch = 's390x'
+        arch = "s390x"
         m_get_dpkg_architecture.return_value = arch
         component = "ubuntu-ports"
         archive = "ports.ubuntu.com"
 
-        cfg = {'primary': [{'arches': ["default"],
-                            'uri':
-                            'http://test.ubuntu.com/%s/' % component}],
-               'security': [{'arches': ["default"],
-                             'uri':
-                             'http://testsec.ubuntu.com/%s/' % component}]}
-        post = ("%s_dists_%s-updates_InRelease" %
-                (component, MOCK_LSB_RELEASE_DATA['codename']))
-        fromfn = ("%s/%s_%s" % (pre, archive, post))
-        tofn = ("%s/test.ubuntu.com_%s" % (pre, post))
+        cfg = {
+            "primary": [
+                {
+                    "arches": ["default"],
+                    "uri": "http://test.ubuntu.com/%s/" % component,
+                }
+            ],
+            "security": [
+                {
+                    "arches": ["default"],
+                    "uri": "http://testsec.ubuntu.com/%s/" % component,
+                }
+            ],
+        }
+        post = "%s_dists_%s-updates_InRelease" % (
+            component,
+            MOCK_LSB_RELEASE_DATA["codename"],
+        )
+        fromfn = "%s/%s_%s" % (pre, archive, post)
+        tofn = "%s/test.ubuntu.com_%s" % (pre, post)
 
         mirrors = cc_apt_configure.find_apt_mirror_info(cfg, FakeCloud(), arch)
 
-        self.assertEqual(mirrors['MIRROR'],
-                         "http://test.ubuntu.com/%s/" % component)
-        self.assertEqual(mirrors['PRIMARY'],
-                         "http://test.ubuntu.com/%s/" % component)
-        self.assertEqual(mirrors['SECURITY'],
-                         "http://testsec.ubuntu.com/%s/" % component)
+        self.assertEqual(
+            mirrors["MIRROR"], "http://test.ubuntu.com/%s/" % component
+        )
+        self.assertEqual(
+            mirrors["PRIMARY"], "http://test.ubuntu.com/%s/" % component
+        )
+        self.assertEqual(
+            mirrors["SECURITY"], "http://testsec.ubuntu.com/%s/" % component
+        )
 
-        with mock.patch.object(os, 'rename') as mockren:
-            with mock.patch.object(glob, 'glob',
-                                   return_value=[fromfn]):
+        with mock.patch.object(os, "rename") as mockren:
+            with mock.patch.object(glob, "glob", return_value=[fromfn]):
                 cc_apt_configure.rename_apt_lists(mirrors, TARGET, arch)
 
         mockren.assert_any_call(fromfn, tofn)
@@ -515,13 +696,13 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         target = os.path.join(self.tmp, "rename_non_slash")
         apt_lists_d = os.path.join(target, "./" + cc_apt_configure.APT_LISTS)
 
-        arch = 'amd64'
+        arch = "amd64"
         m_get_dpkg_architecture.return_value = arch
 
         mirror_path = "some/random/path/"
         primary = "http://test.ubuntu.com/" + mirror_path
         security = "http://test-security.ubuntu.com/" + mirror_path
-        mirrors = {'PRIMARY': primary, 'SECURITY': security}
+        mirrors = {"PRIMARY": primary, "SECURITY": security}
 
         # these match default archive prefixes
         opri_pre = "archive.ubuntu.com_ubuntu_dists_xenial"
@@ -559,203 +740,226 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
     @staticmethod
     def test_apt_v3_proxy():
         """test_apt_v3_proxy - Test apt_*proxy configuration"""
-        cfg = {"proxy": "foobar1",
-               "http_proxy": "foobar2",
-               "ftp_proxy": "foobar3",
-               "https_proxy": "foobar4"}
+        cfg = {
+            "proxy": "foobar1",
+            "http_proxy": "foobar2",
+            "ftp_proxy": "foobar3",
+            "https_proxy": "foobar4",
+        }
 
-        with mock.patch.object(util, 'write_file') as mockobj:
+        with mock.patch.object(util, "write_file") as mockobj:
             cc_apt_configure.apply_apt_config(cfg, "proxyfn", "notused")
 
-        mockobj.assert_called_with('proxyfn',
-                                   ('Acquire::http::Proxy "foobar1";\n'
-                                    'Acquire::http::Proxy "foobar2";\n'
-                                    'Acquire::ftp::Proxy "foobar3";\n'
-                                    'Acquire::https::Proxy "foobar4";\n'))
+        mockobj.assert_called_with(
+            "proxyfn",
+            'Acquire::http::Proxy "foobar1";\n'
+            'Acquire::http::Proxy "foobar2";\n'
+            'Acquire::ftp::Proxy "foobar3";\n'
+            'Acquire::https::Proxy "foobar4";\n',
+        )
 
     def test_apt_v3_mirror(self):
         """test_apt_v3_mirror - Test defining a mirror"""
         pmir = "http://us.archive.ubuntu.com/ubuntu/"
         smir = "http://security.ubuntu.com/ubuntu/"
-        cfg = {"primary": [{'arches': ["default"],
-                            "uri": pmir}],
-               "security": [{'arches': ["default"],
-                             "uri": smir}]}
+        cfg = {
+            "primary": [{"arches": ["default"], "uri": pmir}],
+            "security": [{"arches": ["default"], "uri": smir}],
+        }
 
         mirrors = cc_apt_configure.find_apt_mirror_info(
-            cfg, FakeCloud(), 'amd64')
+            cfg, FakeCloud(), "amd64"
+        )
 
-        self.assertEqual(mirrors['MIRROR'],
-                         pmir)
-        self.assertEqual(mirrors['PRIMARY'],
-                         pmir)
-        self.assertEqual(mirrors['SECURITY'],
-                         smir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     def test_apt_v3_mirror_default(self):
         """test_apt_v3_mirror_default - Test without defining a mirror"""
-        arch = 'amd64'
+        arch = "amd64"
         default_mirrors = cc_apt_configure.get_default_mirrors(arch)
         pmir = default_mirrors["PRIMARY"]
         smir = default_mirrors["SECURITY"]
         mycloud = get_cloud()
         mirrors = cc_apt_configure.find_apt_mirror_info({}, mycloud, arch)
 
-        self.assertEqual(mirrors['MIRROR'],
-                         pmir)
-        self.assertEqual(mirrors['PRIMARY'],
-                         pmir)
-        self.assertEqual(mirrors['SECURITY'],
-                         smir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     def test_apt_v3_mirror_arches(self):
         """test_apt_v3_mirror_arches - Test arches selection of mirror"""
         pmir = "http://my-primary.ubuntu.com/ubuntu/"
         smir = "http://my-security.ubuntu.com/ubuntu/"
-        arch = 'ppc64el'
-        cfg = {"primary": [{'arches': ["default"], "uri": "notthis-primary"},
-                           {'arches': [arch], "uri": pmir}],
-               "security": [{'arches': ["default"], "uri": "nothis-security"},
-                            {'arches': [arch], "uri": smir}]}
+        arch = "ppc64el"
+        cfg = {
+            "primary": [
+                {"arches": ["default"], "uri": "notthis-primary"},
+                {"arches": [arch], "uri": pmir},
+            ],
+            "security": [
+                {"arches": ["default"], "uri": "nothis-security"},
+                {"arches": [arch], "uri": smir},
+            ],
+        }
 
         mirrors = cc_apt_configure.find_apt_mirror_info(cfg, FakeCloud(), arch)
 
-        self.assertEqual(mirrors['PRIMARY'], pmir)
-        self.assertEqual(mirrors['MIRROR'], pmir)
-        self.assertEqual(mirrors['SECURITY'], smir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     def test_apt_v3_mirror_arches_default(self):
         """test_apt_v3_mirror_arches - Test falling back to default arch"""
         pmir = "http://us.archive.ubuntu.com/ubuntu/"
         smir = "http://security.ubuntu.com/ubuntu/"
-        cfg = {"primary": [{'arches': ["default"],
-                            "uri": pmir},
-                           {'arches': ["thisarchdoesntexist"],
-                            "uri": "notthis"}],
-               "security": [{'arches': ["thisarchdoesntexist"],
-                             "uri": "nothat"},
-                            {'arches': ["default"],
-                             "uri": smir}]}
+        cfg = {
+            "primary": [
+                {"arches": ["default"], "uri": pmir},
+                {"arches": ["thisarchdoesntexist"], "uri": "notthis"},
+            ],
+            "security": [
+                {"arches": ["thisarchdoesntexist"], "uri": "nothat"},
+                {"arches": ["default"], "uri": smir},
+            ],
+        }
 
         mirrors = cc_apt_configure.find_apt_mirror_info(
-            cfg, FakeCloud(), 'amd64')
+            cfg, FakeCloud(), "amd64"
+        )
 
-        self.assertEqual(mirrors['MIRROR'],
-                         pmir)
-        self.assertEqual(mirrors['PRIMARY'],
-                         pmir)
-        self.assertEqual(mirrors['SECURITY'],
-                         smir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     @mock.patch("cloudinit.config.cc_apt_configure.util.get_dpkg_architecture")
     def test_apt_v3_get_def_mir_non_intel_no_arch(
         self, m_get_dpkg_architecture
     ):
-        arch = 'ppc64el'
+        arch = "ppc64el"
         m_get_dpkg_architecture.return_value = arch
-        expected = {'PRIMARY': 'http://ports.ubuntu.com/ubuntu-ports',
-                    'SECURITY': 'http://ports.ubuntu.com/ubuntu-ports'}
+        expected = {
+            "PRIMARY": "http://ports.ubuntu.com/ubuntu-ports",
+            "SECURITY": "http://ports.ubuntu.com/ubuntu-ports",
+        }
         self.assertEqual(expected, cc_apt_configure.get_default_mirrors())
 
     def test_apt_v3_get_default_mirrors_non_intel_with_arch(self):
-        found = cc_apt_configure.get_default_mirrors('ppc64el')
+        found = cc_apt_configure.get_default_mirrors("ppc64el")
 
-        expected = {'PRIMARY': 'http://ports.ubuntu.com/ubuntu-ports',
-                    'SECURITY': 'http://ports.ubuntu.com/ubuntu-ports'}
+        expected = {
+            "PRIMARY": "http://ports.ubuntu.com/ubuntu-ports",
+            "SECURITY": "http://ports.ubuntu.com/ubuntu-ports",
+        }
         self.assertEqual(expected, found)
 
     def test_apt_v3_mirror_arches_sysdefault(self):
         """test_apt_v3_mirror_arches - Test arches fallback to sys default"""
-        arch = 'amd64'
+        arch = "amd64"
         default_mirrors = cc_apt_configure.get_default_mirrors(arch)
         pmir = default_mirrors["PRIMARY"]
         smir = default_mirrors["SECURITY"]
         mycloud = get_cloud()
-        cfg = {"primary": [{'arches': ["thisarchdoesntexist_64"],
-                            "uri": "notthis"},
-                           {'arches': ["thisarchdoesntexist"],
-                            "uri": "notthiseither"}],
-               "security": [{'arches': ["thisarchdoesntexist"],
-                             "uri": "nothat"},
-                            {'arches': ["thisarchdoesntexist_64"],
-                             "uri": "nothateither"}]}
+        cfg = {
+            "primary": [
+                {"arches": ["thisarchdoesntexist_64"], "uri": "notthis"},
+                {"arches": ["thisarchdoesntexist"], "uri": "notthiseither"},
+            ],
+            "security": [
+                {"arches": ["thisarchdoesntexist"], "uri": "nothat"},
+                {"arches": ["thisarchdoesntexist_64"], "uri": "nothateither"},
+            ],
+        }
 
         mirrors = cc_apt_configure.find_apt_mirror_info(cfg, mycloud, arch)
 
-        self.assertEqual(mirrors['MIRROR'], pmir)
-        self.assertEqual(mirrors['PRIMARY'], pmir)
-        self.assertEqual(mirrors['SECURITY'], smir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     def test_apt_v3_mirror_search(self):
         """test_apt_v3_mirror_search - Test searching mirrors in a list
-            mock checks to avoid relying on network connectivity"""
+        mock checks to avoid relying on network connectivity"""
         pmir = "http://us.archive.ubuntu.com/ubuntu/"
         smir = "http://security.ubuntu.com/ubuntu/"
-        cfg = {"primary": [{'arches': ["default"],
-                            "search": ["pfailme", pmir]}],
-               "security": [{'arches': ["default"],
-                             "search": ["sfailme", smir]}]}
-
-        with mock.patch.object(cc_apt_configure.util, 'search_for_mirror',
-                               side_effect=[pmir, smir]) as mocksearch:
-            mirrors = cc_apt_configure.find_apt_mirror_info(cfg, FakeCloud(),
-                                                            'amd64')
-
-        calls = [call(["pfailme", pmir]),
-                 call(["sfailme", smir])]
+        cfg = {
+            "primary": [{"arches": ["default"], "search": ["pfailme", pmir]}],
+            "security": [{"arches": ["default"], "search": ["sfailme", smir]}],
+        }
+
+        with mock.patch.object(
+            cc_apt_configure.util,
+            "search_for_mirror",
+            side_effect=[pmir, smir],
+        ) as mocksearch:
+            mirrors = cc_apt_configure.find_apt_mirror_info(
+                cfg, FakeCloud(), "amd64"
+            )
+
+        calls = [call(["pfailme", pmir]), call(["sfailme", smir])]
         mocksearch.assert_has_calls(calls)
 
-        self.assertEqual(mirrors['MIRROR'],
-                         pmir)
-        self.assertEqual(mirrors['PRIMARY'],
-                         pmir)
-        self.assertEqual(mirrors['SECURITY'],
-                         smir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     def test_apt_v3_mirror_search_many2(self):
         """test_apt_v3_mirror_search_many3 - Test both mirrors specs at once"""
         pmir = "http://us.archive.ubuntu.com/ubuntu/"
         smir = "http://security.ubuntu.com/ubuntu/"
-        cfg = {"primary": [{'arches': ["default"],
-                            "uri": pmir,
-                            "search": ["pfailme", "foo"]}],
-               "security": [{'arches': ["default"],
-                             "uri": smir,
-                             "search": ["sfailme", "bar"]}]}
+        cfg = {
+            "primary": [
+                {
+                    "arches": ["default"],
+                    "uri": pmir,
+                    "search": ["pfailme", "foo"],
+                }
+            ],
+            "security": [
+                {
+                    "arches": ["default"],
+                    "uri": smir,
+                    "search": ["sfailme", "bar"],
+                }
+            ],
+        }
 
-        arch = 'amd64'
+        arch = "amd64"
 
         # should be called only once per type, despite two mirror configs
         mycloud = None
-        with mock.patch.object(cc_apt_configure, 'get_mirror',
-                               return_value="http://mocked/foo") as mockgm:
+        with mock.patch.object(
+            cc_apt_configure, "get_mirror", return_value="http://mocked/foo"
+        ) as mockgm:
             mirrors = cc_apt_configure.find_apt_mirror_info(cfg, mycloud, arch)
-        calls = [call(cfg, 'primary', arch, mycloud),
-                 call(cfg, 'security', arch, mycloud)]
+        calls = [
+            call(cfg, "primary", arch, mycloud),
+            call(cfg, "security", arch, mycloud),
+        ]
         mockgm.assert_has_calls(calls)
 
         # should not be called, since primary is specified
-        with mock.patch.object(cc_apt_configure.util,
-                               'search_for_mirror') as mockse:
+        with mock.patch.object(
+            cc_apt_configure.util, "search_for_mirror"
+        ) as mockse:
             mirrors = cc_apt_configure.find_apt_mirror_info(
-                cfg, FakeCloud(), arch)
+                cfg, FakeCloud(), arch
+            )
         mockse.assert_not_called()
 
-        self.assertEqual(mirrors['MIRROR'],
-                         pmir)
-        self.assertEqual(mirrors['PRIMARY'],
-                         pmir)
-        self.assertEqual(mirrors['SECURITY'],
-                         smir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     def test_apt_v3_url_resolvable(self):
         """test_apt_v3_url_resolvable - Test resolving urls"""
 
-        with mock.patch.object(util, 'is_resolvable') as mockresolve:
+        with mock.patch.object(util, "is_resolvable") as mockresolve:
             util.is_resolvable_url("http://1.2.3.4/ubuntu")
         mockresolve.assert_called_with("1.2.3.4")
 
-        with mock.patch.object(util, 'is_resolvable') as mockresolve:
+        with mock.patch.object(util, "is_resolvable") as mockresolve:
             util.is_resolvable_url("http://us.archive.ubuntu.com/ubuntu")
         mockresolve.assert_called_with("us.archive.ubuntu.com")
 
@@ -764,25 +968,27 @@ class TestAptSourceConfig(t_help.FilesystemMockingTestCase):
         util._DNS_REDIRECT_IP = None
         bad = [(None, None, None, "badname", ["10.3.2.1"])]
         good = [(None, None, None, "goodname", ["10.2.3.4"])]
-        with mock.patch.object(socket, 'getaddrinfo',
-                               side_effect=[bad, bad, bad, good,
-                                            good]) as mocksock:
+        with mock.patch.object(
+            socket, "getaddrinfo", side_effect=[bad, bad, bad, good, good]
+        ) as mocksock:
             ret = util.is_resolvable_url("http://us.archive.ubuntu.com/ubuntu")
             ret2 = util.is_resolvable_url("http://1.2.3.4/ubuntu")
-        mocksock.assert_any_call('does-not-exist.example.com.', None,
-                                 0, 0, 1, 2)
-        mocksock.assert_any_call('example.invalid.', None, 0, 0, 1, 2)
-        mocksock.assert_any_call('us.archive.ubuntu.com', None)
-        mocksock.assert_any_call('1.2.3.4', None)
+        mocksock.assert_any_call(
+            "does-not-exist.example.com.", None, 0, 0, 1, 2
+        )
+        mocksock.assert_any_call("example.invalid.", None, 0, 0, 1, 2)
+        mocksock.assert_any_call("us.archive.ubuntu.com", None)
+        mocksock.assert_any_call("1.2.3.4", None)
 
         self.assertTrue(ret)
         self.assertTrue(ret2)
 
         # side effect need only bad ret after initial call
-        with mock.patch.object(socket, 'getaddrinfo',
-                               side_effect=[bad]) as mocksock:
+        with mock.patch.object(
+            socket, "getaddrinfo", side_effect=[bad]
+        ) as mocksock:
             ret3 = util.is_resolvable_url("http://failme.com/ubuntu")
-        calls = [call('failme.com', None)]
+        calls = [call("failme.com", None)]
         mocksock.assert_has_calls(calls)
         self.assertFalse(ret3)
 
@@ -818,24 +1024,28 @@ deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
 
         # single disable other suite
         disabled = ["$RELEASE-updates"]
-        expect = ("""deb http://ubuntu.com//ubuntu xenial main
+        expect = (
+            """deb http://ubuntu.com//ubuntu xenial main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu"""
-                  """ xenial-updates main
+            """ xenial-updates main
 deb http://ubuntu.com//ubuntu xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
-deb http://ubuntu.com/ubuntu/ xenial-proposed main""")
+deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
+        )
         result = cc_apt_configure.disable_suites(disabled, orig, release)
         self.assertEqual(expect, result)
 
         # multi disable
         disabled = ["$RELEASE-updates", "$RELEASE-security"]
-        expect = ("""deb http://ubuntu.com//ubuntu xenial main
+        expect = (
+            """deb http://ubuntu.com//ubuntu xenial main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu """
-                  """xenial-updates main
+            """xenial-updates main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu """
-                  """xenial-security main
+            """xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
-deb http://ubuntu.com/ubuntu/ xenial-proposed main""")
+deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
+        )
         result = cc_apt_configure.disable_suites(disabled, orig, release)
         self.assertEqual(expect, result)
 
@@ -848,17 +1058,19 @@ deb-src http://ubuntu.com//ubuntu universe multiverse
 deb http://UBUNTU.com//ubuntu xenial-updates main
 deb http://UBUNTU.COM//ubuntu xenial-updates main
 deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
-        expect = ("""deb http://ubuntu.com//ubuntu xenial main
+        expect = (
+            """deb http://ubuntu.com//ubuntu xenial main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu """
-                  """xenial-updates main
+            """xenial-updates main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu """
-                  """xenial-security main
+            """xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
 # suite disabled by cloud-init: deb http://UBUNTU.com//ubuntu """
-                  """xenial-updates main
+            """xenial-updates main
 # suite disabled by cloud-init: deb http://UBUNTU.COM//ubuntu """
-                  """xenial-updates main
-deb http://ubuntu.com/ubuntu/ xenial-proposed main""")
+            """xenial-updates main
+deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
+        )
         result = cc_apt_configure.disable_suites(disabled, orig, release)
         self.assertEqual(expect, result)
 
@@ -872,17 +1084,19 @@ deb-src http://ubuntu.com//ubuntu universe multiverse
 #deb http://UBUNTU.com//ubuntu xenial-updates main
 deb http://UBUNTU.COM//ubuntu xenial-updates main
 deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
-        expect = ("""deb http://ubuntu.com//ubuntu xenial main
+        expect = (
+            """deb http://ubuntu.com//ubuntu xenial main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu """
-                  """xenial-updates main
+            """xenial-updates main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu """
-                  """xenial-security main
+            """xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
 #foo
 #deb http://UBUNTU.com//ubuntu xenial-updates main
 # suite disabled by cloud-init: deb http://UBUNTU.COM//ubuntu """
-                  """xenial-updates main
-deb http://ubuntu.com/ubuntu/ xenial-proposed main""")
+            """xenial-updates main
+deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
+        )
         result = cc_apt_configure.disable_suites(disabled, orig, release)
         self.assertEqual(expect, result)
 
@@ -919,12 +1133,14 @@ deb [a=b] http://ubu.com//ubu xenial-updates main
 deb http://ubuntu.com//ubuntu xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
 deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
-        expect = ("""deb http://ubuntu.com//ubuntu xenial main
+        expect = (
+            """deb http://ubuntu.com//ubuntu xenial main
 # suite disabled by cloud-init: deb [a=b] http://ubu.com//ubu """
-                  """xenial-updates main
+            """xenial-updates main
 deb http://ubuntu.com//ubuntu xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
-deb http://ubuntu.com/ubuntu/ xenial-proposed main""")
+deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
+        )
         result = cc_apt_configure.disable_suites(disabled, orig, release)
         self.assertEqual(expect, result)
 
@@ -951,134 +1167,167 @@ deb [arch=foo] http://ubuntu.com//ubuntu xenial-updates main
 deb http://ubuntu.com//ubuntu xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
 deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
-        expect = ("""deb http://ubuntu.com//ubuntu xenial main
+        expect = (
+            """deb http://ubuntu.com//ubuntu xenial main
 deb [arch=foo] http://ubuntu.com//ubuntu xenial-updates main
 # suite disabled by cloud-init: deb http://ubuntu.com//ubuntu """
-                  """xenial-security main
+            """xenial-security main
 deb-src http://ubuntu.com//ubuntu universe multiverse
-deb http://ubuntu.com/ubuntu/ xenial-proposed main""")
+deb http://ubuntu.com/ubuntu/ xenial-proposed main"""
+        )
         result = cc_apt_configure.disable_suites(disabled, orig, release)
         self.assertEqual(expect, result)
 
     def test_disable_suites_blank_lines(self):
         """test_disable_suites_blank_lines - ensure blank lines allowed"""
-        lines = ["deb %(repo)s %(rel)s main universe",
-                 "",
-                 "deb %(repo)s %(rel)s-updates main universe",
-                 "   # random comment",
-                 "#comment here",
-                 ""]
+        lines = [
+            "deb %(repo)s %(rel)s main universe",
+            "",
+            "deb %(repo)s %(rel)s-updates main universe",
+            "   # random comment",
+            "#comment here",
+            "",
+        ]
         rel = "trusty"
-        repo = 'http://example.com/mirrors/ubuntu'
-        orig = "\n".join(lines) % {'repo': repo, 'rel': rel}
+        repo = "http://example.com/mirrors/ubuntu"
+        orig = "\n".join(lines) % {"repo": repo, "rel": rel}
         self.assertEqual(
-            orig, cc_apt_configure.disable_suites(["proposed"], orig, rel))
+            orig, cc_apt_configure.disable_suites(["proposed"], orig, rel)
+        )
 
-    @mock.patch("cloudinit.util.get_hostname", return_value='abc.localdomain')
+    @mock.patch("cloudinit.util.get_hostname", return_value="abc.localdomain")
     def test_apt_v3_mirror_search_dns(self, m_get_hostname):
         """test_apt_v3_mirror_search_dns - Test searching dns patterns"""
         pmir = "phit"
         smir = "shit"
-        arch = 'amd64'
-        mycloud = get_cloud('ubuntu')
-        cfg = {"primary": [{'arches': ["default"],
-                            "search_dns": True}],
-               "security": [{'arches': ["default"],
-                             "search_dns": True}]}
-
-        with mock.patch.object(cc_apt_configure, 'get_mirror',
-                               return_value="http://mocked/foo") as mockgm:
+        arch = "amd64"
+        mycloud = get_cloud("ubuntu")
+        cfg = {
+            "primary": [{"arches": ["default"], "search_dns": True}],
+            "security": [{"arches": ["default"], "search_dns": True}],
+        }
+
+        with mock.patch.object(
+            cc_apt_configure, "get_mirror", return_value="http://mocked/foo"
+        ) as mockgm:
             mirrors = cc_apt_configure.find_apt_mirror_info(cfg, mycloud, arch)
-        calls = [call(cfg, 'primary', arch, mycloud),
-                 call(cfg, 'security', arch, mycloud)]
+        calls = [
+            call(cfg, "primary", arch, mycloud),
+            call(cfg, "security", arch, mycloud),
+        ]
         mockgm.assert_has_calls(calls)
 
-        with mock.patch.object(cc_apt_configure, 'search_for_mirror_dns',
-                               return_value="http://mocked/foo") as mocksdns:
+        with mock.patch.object(
+            cc_apt_configure,
+            "search_for_mirror_dns",
+            return_value="http://mocked/foo",
+        ) as mocksdns:
             mirrors = cc_apt_configure.find_apt_mirror_info(cfg, mycloud, arch)
-        calls = [call(True, 'primary', cfg, mycloud),
-                 call(True, 'security', cfg, mycloud)]
+        calls = [
+            call(True, "primary", cfg, mycloud),
+            call(True, "security", cfg, mycloud),
+        ]
         mocksdns.assert_has_calls(calls)
 
         # first return is for the non-dns call before
-        with mock.patch.object(cc_apt_configure.util, 'search_for_mirror',
-                               side_effect=[None, pmir, None, smir]) as mockse:
+        with mock.patch.object(
+            cc_apt_configure.util,
+            "search_for_mirror",
+            side_effect=[None, pmir, None, smir],
+        ) as mockse:
             mirrors = cc_apt_configure.find_apt_mirror_info(cfg, mycloud, arch)
 
-        calls = [call(None),
-                 call(['http://ubuntu-mirror.localdomain/ubuntu',
-                       'http://ubuntu-mirror/ubuntu']),
-                 call(None),
-                 call(['http://ubuntu-security-mirror.localdomain/ubuntu',
-                       'http://ubuntu-security-mirror/ubuntu'])]
+        calls = [
+            call(None),
+            call(
+                [
+                    "http://ubuntu-mirror.localdomain/ubuntu",
+                    "http://ubuntu-mirror/ubuntu",
+                ]
+            ),
+            call(None),
+            call(
+                [
+                    "http://ubuntu-security-mirror.localdomain/ubuntu",
+                    "http://ubuntu-security-mirror/ubuntu",
+                ]
+            ),
+        ]
         mockse.assert_has_calls(calls)
 
-        self.assertEqual(mirrors['MIRROR'],
-                         pmir)
-        self.assertEqual(mirrors['PRIMARY'],
-                         pmir)
-        self.assertEqual(mirrors['SECURITY'],
-                         smir)
+        self.assertEqual(mirrors["MIRROR"], pmir)
+        self.assertEqual(mirrors["PRIMARY"], pmir)
+        self.assertEqual(mirrors["SECURITY"], smir)
 
     def test_apt_v3_add_mirror_keys(self):
         """test_apt_v3_add_mirror_keys - Test adding key for mirrors"""
-        arch = 'amd64'
+        arch = "amd64"
         cfg = {
-            'primary': [
-                {'arches': [arch],
-                 'uri': 'http://test.ubuntu.com/',
-                 'filename': 'primary',
-                 'key': 'fakekey_primary'}],
-            'security': [
-                {'arches': [arch],
-                 'uri': 'http://testsec.ubuntu.com/',
-                 'filename': 'security',
-                 'key': 'fakekey_security'}]
+            "primary": [
+                {
+                    "arches": [arch],
+                    "uri": "http://test.ubuntu.com/",
+                    "filename": "primary",
+                    "key": "fakekey_primary",
+                }
+            ],
+            "security": [
+                {
+                    "arches": [arch],
+                    "uri": "http://testsec.ubuntu.com/",
+                    "filename": "security",
+                    "key": "fakekey_security",
+                }
+            ],
         }
 
-        with mock.patch.object(cc_apt_configure,
-                               'add_apt_key_raw') as mockadd:
+        with mock.patch.object(cc_apt_configure, "add_apt_key_raw") as mockadd:
             cc_apt_configure.add_mirror_keys(cfg, TARGET)
         calls = [
-            mock.call('fakekey_primary', 'primary', hardened=False),
-            mock.call('fakekey_security', 'security', hardened=False),
+            mock.call("fakekey_primary", "primary", hardened=False),
+            mock.call("fakekey_security", "security", hardened=False),
         ]
         mockadd.assert_has_calls(calls, any_order=True)
 
 
 class TestDebconfSelections(TestCase):
-
     @mock.patch("cloudinit.config.cc_apt_configure.subp.subp")
     def test_set_sel_appends_newline_if_absent(self, m_subp):
         """Automatically append a newline to debconf-set-selections config."""
-        selections = b'some/setting boolean true'
+        selections = b"some/setting boolean true"
         cc_apt_configure.debconf_set_selections(selections=selections)
-        cc_apt_configure.debconf_set_selections(selections=selections + b'\n')
+        cc_apt_configure.debconf_set_selections(selections=selections + b"\n")
         m_call = mock.call(
-            ['debconf-set-selections'], data=selections + b'\n', capture=True,
-            target=None)
+            ["debconf-set-selections"],
+            data=selections + b"\n",
+            capture=True,
+            target=None,
+        )
         self.assertEqual([m_call, m_call], m_subp.call_args_list)
 
     @mock.patch("cloudinit.config.cc_apt_configure.debconf_set_selections")
     def test_no_set_sel_if_none_to_set(self, m_set_sel):
-        cc_apt_configure.apply_debconf_selections({'foo': 'bar'})
+        cc_apt_configure.apply_debconf_selections({"foo": "bar"})
         m_set_sel.assert_not_called()
 
-    @mock.patch("cloudinit.config.cc_apt_configure."
-                "debconf_set_selections")
-    @mock.patch("cloudinit.config.cc_apt_configure."
-                "util.get_installed_packages")
+    @mock.patch("cloudinit.config.cc_apt_configure.debconf_set_selections")
+    @mock.patch(
+        "cloudinit.config.cc_apt_configure.util.get_installed_packages"
+    )
     def test_set_sel_call_has_expected_input(self, m_get_inst, m_set_sel):
         data = {
-            'set1': 'pkga pkga/q1 mybool false',
-            'set2': ('pkgb\tpkgb/b1\tstr\tthis is a string\n'
-                     'pkgc\tpkgc/ip\tstring\t10.0.0.1')}
-        lines = '\n'.join(data.values()).split('\n')
+            "set1": "pkga pkga/q1 mybool false",
+            "set2": (
+                "pkgb\tpkgb/b1\tstr\tthis is a string\n"
+                "pkgc\tpkgc/ip\tstring\t10.0.0.1"
+            ),
+        }
+        lines = "\n".join(data.values()).split("\n")
 
         m_get_inst.return_value = ["adduser", "apparmor"]
         m_set_sel.return_value = None
 
-        cc_apt_configure.apply_debconf_selections({'debconf_selections': data})
+        cc_apt_configure.apply_debconf_selections({"debconf_selections": data})
         self.assertTrue(m_get_inst.called)
         self.assertEqual(m_set_sel.call_count, 1)
 
@@ -1092,43 +1341,59 @@ class TestDebconfSelections(TestCase):
 
     @mock.patch("cloudinit.config.cc_apt_configure.dpkg_reconfigure")
     @mock.patch("cloudinit.config.cc_apt_configure.debconf_set_selections")
-    @mock.patch("cloudinit.config.cc_apt_configure."
-                "util.get_installed_packages")
-    def test_reconfigure_if_intersection(self, m_get_inst, m_set_sel,
-                                         m_dpkg_r):
+    @mock.patch(
+        "cloudinit.config.cc_apt_configure.util.get_installed_packages"
+    )
+    def test_reconfigure_if_intersection(
+        self, m_get_inst, m_set_sel, m_dpkg_r
+    ):
         data = {
-            'set1': 'pkga pkga/q1 mybool false',
-            'set2': ('pkgb\tpkgb/b1\tstr\tthis is a string\n'
-                     'pkgc\tpkgc/ip\tstring\t10.0.0.1'),
-            'cloud-init': ('cloud-init cloud-init/datasources'
-                           'multiselect MAAS')}
+            "set1": "pkga pkga/q1 mybool false",
+            "set2": (
+                "pkgb\tpkgb/b1\tstr\tthis is a string\n"
+                "pkgc\tpkgc/ip\tstring\t10.0.0.1"
+            ),
+            "cloud-init": "cloud-init cloud-init/datasourcesmultiselect MAAS",
+        }
 
         m_set_sel.return_value = None
-        m_get_inst.return_value = ["adduser", "apparmor", "pkgb",
-                                   "cloud-init", 'zdog']
+        m_get_inst.return_value = [
+            "adduser",
+            "apparmor",
+            "pkgb",
+            "cloud-init",
+            "zdog",
+        ]
 
-        cc_apt_configure.apply_debconf_selections({'debconf_selections': data})
+        cc_apt_configure.apply_debconf_selections({"debconf_selections": data})
 
         # reconfigure should be called with the intersection
         # of (packages in config, packages installed)
         self.assertEqual(m_dpkg_r.call_count, 1)
         # assumes called with *args (dpkg_reconfigure([a,b,c], target=))
         packages = m_dpkg_r.call_args_list[0][0][0]
-        self.assertEqual(set(['cloud-init', 'pkgb']), set(packages))
+        self.assertEqual(set(["cloud-init", "pkgb"]), set(packages))
 
     @mock.patch("cloudinit.config.cc_apt_configure.dpkg_reconfigure")
     @mock.patch("cloudinit.config.cc_apt_configure.debconf_set_selections")
-    @mock.patch("cloudinit.config.cc_apt_configure."
-                "util.get_installed_packages")
-    def test_reconfigure_if_no_intersection(self, m_get_inst, m_set_sel,
-                                            m_dpkg_r):
-        data = {'set1': 'pkga pkga/q1 mybool false'}
-
-        m_get_inst.return_value = ["adduser", "apparmor", "pkgb",
-                                   "cloud-init", 'zdog']
+    @mock.patch(
+        "cloudinit.config.cc_apt_configure.util.get_installed_packages"
+    )
+    def test_reconfigure_if_no_intersection(
+        self, m_get_inst, m_set_sel, m_dpkg_r
+    ):
+        data = {"set1": "pkga pkga/q1 mybool false"}
+
+        m_get_inst.return_value = [
+            "adduser",
+            "apparmor",
+            "pkgb",
+            "cloud-init",
+            "zdog",
+        ]
         m_set_sel.return_value = None
 
-        cc_apt_configure.apply_debconf_selections({'debconf_selections': data})
+        cc_apt_configure.apply_debconf_selections({"debconf_selections": data})
 
         self.assertTrue(m_get_inst.called)
         self.assertEqual(m_dpkg_r.call_count, 0)
@@ -1141,19 +1406,25 @@ class TestDebconfSelections(TestCase):
         # mocking clean_cloud_init directly does not work.  So we mock
         # the CONFIG_CLEANERS dictionary and assert our cleaner is called.
         ci_cleaner = mock.MagicMock()
-        with mock.patch.dict(("cloudinit.config.cc_apt_configure."
-                              "CONFIG_CLEANERS"),
-                             values={'cloud-init': ci_cleaner}, clear=True):
-            cc_apt_configure.dpkg_reconfigure(['pkga', 'cloud-init'],
-                                              target=target)
+        with mock.patch.dict(
+            "cloudinit.config.cc_apt_configure.CONFIG_CLEANERS",
+            values={"cloud-init": ci_cleaner},
+            clear=True,
+        ):
+            cc_apt_configure.dpkg_reconfigure(
+                ["pkga", "cloud-init"], target=target
+            )
         # cloud-init is actually the only package we have a cleaner for
         # so for now, its the only one that should reconfigured
         self.assertTrue(m_subp.called)
         ci_cleaner.assert_called_with(target)
         self.assertEqual(m_subp.call_count, 1)
         found = m_subp.call_args_list[0][0][0]
-        expected = ['dpkg-reconfigure', '--frontend=noninteractive',
-                    'cloud-init']
+        expected = [
+            "dpkg-reconfigure",
+            "--frontend=noninteractive",
+            "cloud-init",
+        ]
         self.assertEqual(expected, found)
 
     @mock.patch("cloudinit.config.cc_apt_configure.subp.subp")
@@ -1163,8 +1434,9 @@ class TestDebconfSelections(TestCase):
 
     @mock.patch("cloudinit.config.cc_apt_configure.subp.subp")
     def test_dpkg_reconfigure_not_done_if_no_cleaners(self, m_subp):
-        cc_apt_configure.dpkg_reconfigure(['pkgfoo', 'pkgbar'])
+        cc_apt_configure.dpkg_reconfigure(["pkgfoo", "pkgbar"])
         m_subp.assert_not_called()
 
+
 #
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_apk_configure.py b/tests/unittests/config/test_cc_apk_configure.py
index 70139451..6fbc3dec 100644
--- a/tests/unittests/config/test_cc_apk_configure.py
+++ b/tests/unittests/config/test_cc_apk_configure.py
@@ -8,20 +8,19 @@ import logging
 import os
 import textwrap
 
-from cloudinit import (cloud, helpers, util)
-
+from cloudinit import cloud, helpers, util
 from cloudinit.config import cc_apk_configure
-from tests.unittests.helpers import (FilesystemMockingTestCase, mock)
+from tests.unittests.helpers import FilesystemMockingTestCase, mock
 
 REPO_FILE = "/etc/apk/repositories"
 DEFAULT_MIRROR_URL = "https://alpine.global.ssl.fastly.net/alpine"
-CC_APK = 'cloudinit.config.cc_apk_configure'
+CC_APK = "cloudinit.config.cc_apk_configure"
 
 
 class TestNoConfig(FilesystemMockingTestCase):
     def setUp(self):
         super(TestNoConfig, self).setUp()
-        self.add_patch(CC_APK + '._write_repositories_file', 'm_write_repos')
+        self.add_patch(CC_APK + "._write_repositories_file", "m_write_repos")
         self.name = "apk-configure"
         self.cloud_init = None
         self.log = logging.getLogger("TestNoConfig")
@@ -34,8 +33,9 @@ class TestNoConfig(FilesystemMockingTestCase):
         """
         config = util.get_builtin_cfg()
 
-        cc_apk_configure.handle(self.name, config, self.cloud_init,
-                                self.log, self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud_init, self.log, self.args
+        )
 
         self.assertEqual(0, self.m_write_repos.call_count)
 
@@ -45,15 +45,15 @@ class TestConfig(FilesystemMockingTestCase):
         super(TestConfig, self).setUp()
         self.new_root = self.tmp_dir()
         self.new_root = self.reRoot(root=self.new_root)
-        for dirname in ['tmp', 'etc/apk']:
+        for dirname in ["tmp", "etc/apk"]:
             util.ensure_dir(os.path.join(self.new_root, dirname))
-        self.paths = helpers.Paths({'templates_dir': self.new_root})
+        self.paths = helpers.Paths({"templates_dir": self.new_root})
         self.name = "apk-configure"
         self.cloud = cloud.Cloud(None, self.paths, None, None, None)
         self.log = logging.getLogger("TestNoConfig")
         self.args = []
 
-    @mock.patch(CC_APK + '._write_repositories_file')
+    @mock.patch(CC_APK + "._write_repositories_file")
     def test_no_repo_settings(self, m_write_repos):
         """
         Test that nothing is written if the 'alpine-repo' key
@@ -61,20 +61,22 @@ class TestConfig(FilesystemMockingTestCase):
         """
         config = {"apk_repos": {}}
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
         self.assertEqual(0, m_write_repos.call_count)
 
-    @mock.patch(CC_APK + '._write_repositories_file')
+    @mock.patch(CC_APK + "._write_repositories_file")
     def test_empty_repo_settings(self, m_write_repos):
         """
         Test that nothing is written if 'alpine_repo' list is empty.
         """
         config = {"apk_repos": {"alpine_repo": []}}
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
         self.assertEqual(0, m_write_repos.call_count)
 
@@ -82,19 +84,15 @@ class TestConfig(FilesystemMockingTestCase):
         """
         Test when only details of main repo is written to file.
         """
-        alpine_version = 'v3.12'
-        config = {
-            "apk_repos": {
-                "alpine_repo": {
-                    "version": alpine_version
-                }
-            }
-        }
+        alpine_version = "v3.12"
+        config = {"apk_repos": {"alpine_repo": {"version": alpine_version}}}
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
-        expected_content = textwrap.dedent("""\
+        expected_content = textwrap.dedent(
+            """\
             #
             # Created by cloud-init
             #
@@ -103,7 +101,10 @@ class TestConfig(FilesystemMockingTestCase):
 
             {0}/{1}/main
 
-            """.format(DEFAULT_MIRROR_URL, alpine_version))
+            """.format(
+                DEFAULT_MIRROR_URL, alpine_version
+            )
+        )
 
         self.assertEqual(expected_content, util.load_file(REPO_FILE))
 
@@ -112,20 +113,22 @@ class TestConfig(FilesystemMockingTestCase):
         Test when only details of main and community repos are
         written to file.
         """
-        alpine_version = 'edge'
+        alpine_version = "edge"
         config = {
             "apk_repos": {
                 "alpine_repo": {
                     "version": alpine_version,
-                    "community_enabled": True
+                    "community_enabled": True,
                 }
             }
         }
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
-        expected_content = textwrap.dedent("""\
+        expected_content = textwrap.dedent(
+            """\
             #
             # Created by cloud-init
             #
@@ -135,7 +138,10 @@ class TestConfig(FilesystemMockingTestCase):
             {0}/{1}/main
             {0}/{1}/community
 
-            """.format(DEFAULT_MIRROR_URL, alpine_version))
+            """.format(
+                DEFAULT_MIRROR_URL, alpine_version
+            )
+        )
 
         self.assertEqual(expected_content, util.load_file(REPO_FILE))
 
@@ -144,21 +150,23 @@ class TestConfig(FilesystemMockingTestCase):
         Test when details of main, community and testing repos
         are written to file.
         """
-        alpine_version = 'v3.12'
+        alpine_version = "v3.12"
         config = {
             "apk_repos": {
                 "alpine_repo": {
                     "version": alpine_version,
                     "community_enabled": True,
-                    "testing_enabled": True
+                    "testing_enabled": True,
                 }
             }
         }
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
-        expected_content = textwrap.dedent("""\
+        expected_content = textwrap.dedent(
+            """\
             #
             # Created by cloud-init
             #
@@ -172,7 +180,10 @@ class TestConfig(FilesystemMockingTestCase):
             #
             {0}/edge/testing
 
-            """.format(DEFAULT_MIRROR_URL, alpine_version))
+            """.format(
+                DEFAULT_MIRROR_URL, alpine_version
+            )
+        )
 
         self.assertEqual(expected_content, util.load_file(REPO_FILE))
 
@@ -181,21 +192,23 @@ class TestConfig(FilesystemMockingTestCase):
         Test when details of main, community and testing repos
         for Edge version of Alpine are written to file.
         """
-        alpine_version = 'edge'
+        alpine_version = "edge"
         config = {
             "apk_repos": {
                 "alpine_repo": {
                     "version": alpine_version,
                     "community_enabled": True,
-                    "testing_enabled": True
+                    "testing_enabled": True,
                 }
             }
         }
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
-        expected_content = textwrap.dedent("""\
+        expected_content = textwrap.dedent(
+            """\
             #
             # Created by cloud-init
             #
@@ -206,7 +219,10 @@ class TestConfig(FilesystemMockingTestCase):
             {0}/{1}/community
             {0}/{1}/testing
 
-            """.format(DEFAULT_MIRROR_URL, alpine_version))
+            """.format(
+                DEFAULT_MIRROR_URL, alpine_version
+            )
+        )
 
         self.assertEqual(expected_content, util.load_file(REPO_FILE))
 
@@ -215,23 +231,25 @@ class TestConfig(FilesystemMockingTestCase):
         Test when details of main, community, testing and
         local repos are written to file.
         """
-        alpine_version = 'v3.12'
-        local_repo_url = 'http://some.mirror/whereever'
+        alpine_version = "v3.12"
+        local_repo_url = "http://some.mirror/whereever"
         config = {
             "apk_repos": {
                 "alpine_repo": {
                     "version": alpine_version,
                     "community_enabled": True,
-                    "testing_enabled": True
+                    "testing_enabled": True,
                 },
-                "local_repo_base_url": local_repo_url
+                "local_repo_base_url": local_repo_url,
             }
         }
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
-        expected_content = textwrap.dedent("""\
+        expected_content = textwrap.dedent(
+            """\
             #
             # Created by cloud-init
             #
@@ -250,7 +268,10 @@ class TestConfig(FilesystemMockingTestCase):
             #
             {2}/{1}
 
-            """.format(DEFAULT_MIRROR_URL, alpine_version, local_repo_url))
+            """.format(
+                DEFAULT_MIRROR_URL, alpine_version, local_repo_url
+            )
+        )
 
         self.assertEqual(expected_content, util.load_file(REPO_FILE))
 
@@ -259,23 +280,25 @@ class TestConfig(FilesystemMockingTestCase):
         Test when details of main, community, testing and local repos
         for Edge version of Alpine are written to file.
         """
-        alpine_version = 'edge'
-        local_repo_url = 'http://some.mirror/whereever'
+        alpine_version = "edge"
+        local_repo_url = "http://some.mirror/whereever"
         config = {
             "apk_repos": {
                 "alpine_repo": {
                     "version": alpine_version,
                     "community_enabled": True,
-                    "testing_enabled": True
+                    "testing_enabled": True,
                 },
-                "local_repo_base_url": local_repo_url
+                "local_repo_base_url": local_repo_url,
             }
         }
 
-        cc_apk_configure.handle(self.name, config, self.cloud, self.log,
-                                self.args)
+        cc_apk_configure.handle(
+            self.name, config, self.cloud, self.log, self.args
+        )
 
-        expected_content = textwrap.dedent("""\
+        expected_content = textwrap.dedent(
+            """\
             #
             # Created by cloud-init
             #
@@ -291,7 +314,10 @@ class TestConfig(FilesystemMockingTestCase):
             #
             {2}/{1}
 
-            """.format(DEFAULT_MIRROR_URL, alpine_version, local_repo_url))
+            """.format(
+                DEFAULT_MIRROR_URL, alpine_version, local_repo_url
+            )
+        )
 
         self.assertEqual(expected_content, util.load_file(REPO_FILE))
 
diff --git a/tests/unittests/config/test_cc_apt_pipelining.py b/tests/unittests/config/test_cc_apt_pipelining.py
index d7589d35..b4497156 100644
--- a/tests/unittests/config/test_cc_apt_pipelining.py
+++ b/tests/unittests/config/test_cc_apt_pipelining.py
@@ -3,26 +3,26 @@
 """Tests cc_apt_pipelining handler"""
 
 import cloudinit.config.cc_apt_pipelining as cc_apt_pipelining
-
 from tests.unittests.helpers import CiTestCase, mock
 
 
 class TestAptPipelining(CiTestCase):
-
-    @mock.patch('cloudinit.config.cc_apt_pipelining.util.write_file')
+    @mock.patch("cloudinit.config.cc_apt_pipelining.util.write_file")
     def test_not_disabled_by_default(self, m_write_file):
         """ensure that default behaviour is to not disable pipelining"""
-        cc_apt_pipelining.handle('foo', {}, None, mock.MagicMock(), None)
+        cc_apt_pipelining.handle("foo", {}, None, mock.MagicMock(), None)
         self.assertEqual(0, m_write_file.call_count)
 
-    @mock.patch('cloudinit.config.cc_apt_pipelining.util.write_file')
+    @mock.patch("cloudinit.config.cc_apt_pipelining.util.write_file")
     def test_false_disables_pipelining(self, m_write_file):
         """ensure that pipelining can be disabled with correct config"""
         cc_apt_pipelining.handle(
-            'foo', {'apt_pipelining': 'false'}, None, mock.MagicMock(), None)
+            "foo", {"apt_pipelining": "false"}, None, mock.MagicMock(), None
+        )
         self.assertEqual(1, m_write_file.call_count)
         args, _ = m_write_file.call_args
         self.assertEqual(cc_apt_pipelining.DEFAULT_FILE, args[0])
         self.assertIn('Pipeline-Depth "0"', args[1])
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_bootcmd.py b/tests/unittests/config/test_cc_bootcmd.py
index 6f38f12a..6d8793b9 100644
--- a/tests/unittests/config/test_cc_bootcmd.py
+++ b/tests/unittests/config/test_cc_bootcmd.py
@@ -2,11 +2,14 @@
 import logging
 import tempfile
 
+from cloudinit import subp, util
 from cloudinit.config.cc_bootcmd import handle, schema
-from cloudinit import (subp, util)
 from tests.unittests.helpers import (
-    CiTestCase, mock, SchemaTestCaseMixin, skipUnlessJsonSchema)
-
+    CiTestCase,
+    SchemaTestCaseMixin,
+    mock,
+    skipUnlessJsonSchema,
+)
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -16,7 +19,8 @@ class FakeExtendedTempFile(object):
     def __init__(self, suffix):
         self.suffix = suffix
         self.handle = tempfile.NamedTemporaryFile(
-            prefix="ci-%s." % self.__class__.__name__, delete=False)
+            prefix="ci-%s." % self.__class__.__name__, delete=False
+        )
 
     def __enter__(self):
         return self.handle
@@ -30,8 +34,9 @@ class TestBootcmd(CiTestCase):
 
     with_logs = True
 
-    _etmpfile_path = ('cloudinit.config.cc_bootcmd.temp_utils.'
-                      'ExtendedTemporaryFile')
+    _etmpfile_path = (
+        "cloudinit.config.cc_bootcmd.temp_utils.ExtendedTemporaryFile"
+    )
 
     def setUp(self):
         super(TestBootcmd, self).setUp()
@@ -42,21 +47,23 @@ class TestBootcmd(CiTestCase):
         """When the provided config doesn't contain bootcmd, skip it."""
         cfg = {}
         mycloud = get_cloud()
-        handle('notimportant', cfg, mycloud, LOG, None)
+        handle("notimportant", cfg, mycloud, LOG, None)
         self.assertIn(
             "Skipping module named notimportant, no 'bootcmd' key",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
     def test_handler_invalid_command_set(self):
         """Commands which can't be converted to shell will raise errors."""
-        invalid_config = {'bootcmd': 1}
+        invalid_config = {"bootcmd": 1}
         cc = get_cloud()
         with self.assertRaises(TypeError) as context_manager:
-            handle('cc_bootcmd', invalid_config, cc, LOG, [])
-        self.assertIn('Failed to shellify bootcmd', self.logs.getvalue())
+            handle("cc_bootcmd", invalid_config, cc, LOG, [])
+        self.assertIn("Failed to shellify bootcmd", self.logs.getvalue())
         self.assertEqual(
             "Input to shellify was type 'int'. Expected list or tuple.",
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
     @skipUnlessJsonSchema()
     def test_handler_schema_validation_warns_non_array_type(self):
@@ -65,14 +72,15 @@ class TestBootcmd(CiTestCase):
         Schema validation is not strict, so bootcmd attempts to shellify the
         invalid content.
         """
-        invalid_config = {'bootcmd': 1}
+        invalid_config = {"bootcmd": 1}
         cc = get_cloud()
         with self.assertRaises(TypeError):
-            handle('cc_bootcmd', invalid_config, cc, LOG, [])
+            handle("cc_bootcmd", invalid_config, cc, LOG, [])
         self.assertIn(
-            'Invalid config:\nbootcmd: 1 is not of type \'array\'',
-            self.logs.getvalue())
-        self.assertIn('Failed to shellify', self.logs.getvalue())
+            "Invalid config:\nbootcmd: 1 is not of type 'array'",
+            self.logs.getvalue(),
+        )
+        self.assertIn("Failed to shellify", self.logs.getvalue())
 
     @skipUnlessJsonSchema()
     def test_handler_schema_validation_warns_non_array_item_type(self):
@@ -82,54 +90,58 @@ class TestBootcmd(CiTestCase):
         invalid content.
         """
         invalid_config = {
-            'bootcmd': ['ls /', 20, ['wget', 'http://stuff/blah'], {'a': 'n'}]}
+            "bootcmd": ["ls /", 20, ["wget", "http://stuff/blah"], {"a": "n"}]
+        }
         cc = get_cloud()
         with self.assertRaises(TypeError) as context_manager:
-            handle('cc_bootcmd', invalid_config, cc, LOG, [])
+            handle("cc_bootcmd", invalid_config, cc, LOG, [])
         expected_warnings = [
-            'bootcmd.1: 20 is not valid under any of the given schemas',
-            'bootcmd.3: {\'a\': \'n\'} is not valid under any of the given'
-            ' schema'
+            "bootcmd.1: 20 is not valid under any of the given schemas",
+            "bootcmd.3: {'a': 'n'} is not valid under any of the given schema",
         ]
         logs = self.logs.getvalue()
         for warning in expected_warnings:
             self.assertIn(warning, logs)
-        self.assertIn('Failed to shellify', logs)
+        self.assertIn("Failed to shellify", logs)
         self.assertEqual(
-            ("Unable to shellify type 'int'. Expected list, string, tuple. "
-             "Got: 20"),
-            str(context_manager.exception))
+            "Unable to shellify type 'int'. Expected list, string, tuple. "
+            "Got: 20",
+            str(context_manager.exception),
+        )
 
     def test_handler_creates_and_runs_bootcmd_script_with_instance_id(self):
         """Valid schema runs a bootcmd script with INSTANCE_ID in the env."""
         cc = get_cloud()
-        out_file = self.tmp_path('bootcmd.out', self.new_root)
+        out_file = self.tmp_path("bootcmd.out", self.new_root)
         my_id = "b6ea0f59-e27d-49c6-9f87-79f19765a425"
-        valid_config = {'bootcmd': [
-            'echo {0} $INSTANCE_ID > {1}'.format(my_id, out_file)]}
+        valid_config = {
+            "bootcmd": ["echo {0} $INSTANCE_ID > {1}".format(my_id, out_file)]
+        }
 
         with mock.patch(self._etmpfile_path, FakeExtendedTempFile):
-            with self.allow_subp(['/bin/sh']):
-                handle('cc_bootcmd', valid_config, cc, LOG, [])
-        self.assertEqual(my_id + ' iid-datasource-none\n',
-                         util.load_file(out_file))
+            with self.allow_subp(["/bin/sh"]):
+                handle("cc_bootcmd", valid_config, cc, LOG, [])
+        self.assertEqual(
+            my_id + " iid-datasource-none\n", util.load_file(out_file)
+        )
 
     def test_handler_runs_bootcmd_script_with_error(self):
         """When a valid script generates an error, that error is raised."""
         cc = get_cloud()
-        valid_config = {'bootcmd': ['exit 1']}  # Script with error
+        valid_config = {"bootcmd": ["exit 1"]}  # Script with error
 
         with mock.patch(self._etmpfile_path, FakeExtendedTempFile):
-            with self.allow_subp(['/bin/sh']):
+            with self.allow_subp(["/bin/sh"]):
                 with self.assertRaises(subp.ProcessExecutionError) as ctxt:
-                    handle('does-not-matter', valid_config, cc, LOG, [])
+                    handle("does-not-matter", valid_config, cc, LOG, [])
         self.assertIn(
-            'Unexpected error while running command.\n'
-            "Command: ['/bin/sh',",
-            str(ctxt.exception))
+            "Unexpected error while running command.\nCommand: ['/bin/sh',",
+            str(ctxt.exception),
+        )
         self.assertIn(
-            'Failed to run bootcmd module does-not-matter',
-            self.logs.getvalue())
+            "Failed to run bootcmd module does-not-matter",
+            self.logs.getvalue(),
+        )
 
 
 @skipUnlessJsonSchema()
@@ -141,12 +153,14 @@ class TestSchema(CiTestCase, SchemaTestCaseMixin):
     def test_duplicates_are_fine_array_array(self):
         """Duplicated commands array/array entries are allowed."""
         self.assertSchemaValid(
-            ["byebye", "byebye"], 'command entries can be duplicate')
+            ["byebye", "byebye"], "command entries can be duplicate"
+        )
 
     def test_duplicates_are_fine_array_string(self):
         """Duplicated commands array/string entries are allowed."""
         self.assertSchemaValid(
-            ["echo bye", "echo bye"], "command entries can be duplicate.")
+            ["echo bye", "echo bye"], "command entries can be duplicate."
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_ca_certs.py b/tests/unittests/config/test_cc_ca_certs.py
index 91b005d0..c49922e6 100644
--- a/tests/unittests/config/test_cc_ca_certs.py
+++ b/tests/unittests/config/test_cc_ca_certs.py
@@ -6,13 +6,9 @@ import unittest
 from contextlib import ExitStack
 from unittest import mock
 
-from cloudinit import distros
+from cloudinit import distros, helpers, subp, util
 from cloudinit.config import cc_ca_certs
-from cloudinit import helpers
-from cloudinit import subp
-from cloudinit import util
 from tests.unittests.helpers import TestCase
-
 from tests.unittests.util import get_cloud
 
 
@@ -31,12 +27,15 @@ class TestNoConfig(unittest.TestCase):
         config = util.get_builtin_cfg()
         with ExitStack() as mocks:
             util_mock = mocks.enter_context(
-                mock.patch.object(util, 'write_file'))
+                mock.patch.object(util, "write_file")
+            )
             certs_mock = mocks.enter_context(
-                mock.patch.object(cc_ca_certs, 'update_ca_certs'))
+                mock.patch.object(cc_ca_certs, "update_ca_certs")
+            )
 
-            cc_ca_certs.handle(self.name, config, self.cloud_init, self.log,
-                               self.args)
+            cc_ca_certs.handle(
+                self.name, config, self.cloud_init, self.log, self.args
+            )
 
             self.assertEqual(util_mock.call_count, 0)
             self.assertEqual(certs_mock.call_count, 0)
@@ -61,11 +60,14 @@ class TestConfig(TestCase):
 
         # Mock out the functions that actually modify the system
         self.mock_add = self.mocks.enter_context(
-            mock.patch.object(cc_ca_certs, 'add_ca_certs'))
+            mock.patch.object(cc_ca_certs, "add_ca_certs")
+        )
         self.mock_update = self.mocks.enter_context(
-            mock.patch.object(cc_ca_certs, 'update_ca_certs'))
+            mock.patch.object(cc_ca_certs, "update_ca_certs")
+        )
         self.mock_remove = self.mocks.enter_context(
-            mock.patch.object(cc_ca_certs, 'remove_default_ca_certs'))
+            mock.patch.object(cc_ca_certs, "remove_default_ca_certs")
+        )
 
     def test_no_trusted_list(self):
         """
@@ -106,7 +108,7 @@ class TestConfig(TestCase):
             conf = cc_ca_certs._distro_ca_certs_configs(distro_name)
             cc_ca_certs.handle(self.name, config, cloud, self.log, self.args)
 
-            self.mock_add.assert_called_once_with(conf, ['CERT1'])
+            self.mock_add.assert_called_once_with(conf, ["CERT1"])
             self.assertEqual(self.mock_update.call_count, 1)
             self.assertEqual(self.mock_remove.call_count, 0)
 
@@ -120,7 +122,7 @@ class TestConfig(TestCase):
             conf = cc_ca_certs._distro_ca_certs_configs(distro_name)
             cc_ca_certs.handle(self.name, config, cloud, self.log, self.args)
 
-            self.mock_add.assert_called_once_with(conf, ['CERT1', 'CERT2'])
+            self.mock_add.assert_called_once_with(conf, ["CERT1", "CERT2"])
             self.assertEqual(self.mock_update.call_count, 1)
             self.assertEqual(self.mock_remove.call_count, 0)
 
@@ -160,20 +162,21 @@ class TestConfig(TestCase):
             conf = cc_ca_certs._distro_ca_certs_configs(distro_name)
             cc_ca_certs.handle(self.name, config, cloud, self.log, self.args)
 
-            self.mock_add.assert_called_once_with(conf, ['CERT1'])
+            self.mock_add.assert_called_once_with(conf, ["CERT1"])
             self.assertEqual(self.mock_update.call_count, 1)
             self.assertEqual(self.mock_remove.call_count, 1)
 
 
 class TestAddCaCerts(TestCase):
-
     def setUp(self):
         super(TestAddCaCerts, self).setUp()
         tmpdir = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, tmpdir)
-        self.paths = helpers.Paths({
-            'cloud_dir': tmpdir,
-        })
+        self.paths = helpers.Paths(
+            {
+                "cloud_dir": tmpdir,
+            }
+        )
         self.add_patch("cloudinit.config.cc_ca_certs.os.stat", "m_stat")
 
     def _fetch_distro(self, kind):
@@ -185,7 +188,7 @@ class TestAddCaCerts(TestCase):
         """Test that no certificate are written if not provided."""
         for distro_name in cc_ca_certs.distros:
             conf = cc_ca_certs._distro_ca_certs_configs(distro_name)
-            with mock.patch.object(util, 'write_file') as mockobj:
+            with mock.patch.object(util, "write_file") as mockobj:
                 cc_ca_certs.add_ca_certs(conf, [])
             self.assertEqual(mockobj.call_count, 0)
 
@@ -204,21 +207,28 @@ class TestAddCaCerts(TestCase):
 
             with ExitStack() as mocks:
                 mock_write = mocks.enter_context(
-                    mock.patch.object(util, 'write_file'))
+                    mock.patch.object(util, "write_file")
+                )
                 mock_load = mocks.enter_context(
-                    mock.patch.object(util, 'load_file',
-                                      return_value=ca_certs_content))
+                    mock.patch.object(
+                        util, "load_file", return_value=ca_certs_content
+                    )
+                )
 
                 cc_ca_certs.add_ca_certs(conf, [cert])
 
-                mock_write.assert_has_calls([
-                    mock.call(conf['ca_cert_full_path'],
-                              cert, mode=0o644)])
-                if conf['ca_cert_config'] is not None:
-                    mock_write.assert_has_calls([
-                        mock.call(conf['ca_cert_config'],
-                                  expected, omode="wb")])
-                    mock_load.assert_called_once_with(conf['ca_cert_config'])
+                mock_write.assert_has_calls(
+                    [mock.call(conf["ca_cert_full_path"], cert, mode=0o644)]
+                )
+                if conf["ca_cert_config"] is not None:
+                    mock_write.assert_has_calls(
+                        [
+                            mock.call(
+                                conf["ca_cert_config"], expected, omode="wb"
+                            )
+                        ]
+                    )
+                    mock_load.assert_called_once_with(conf["ca_cert_config"])
 
     def test_single_cert_no_trailing_cr(self):
         """Test adding a single certificate to the trusted CAs
@@ -234,24 +244,32 @@ class TestAddCaCerts(TestCase):
 
             with ExitStack() as mocks:
                 mock_write = mocks.enter_context(
-                    mock.patch.object(util, 'write_file'))
+                    mock.patch.object(util, "write_file")
+                )
                 mock_load = mocks.enter_context(
-                    mock.patch.object(util, 'load_file',
-                                      return_value=ca_certs_content))
+                    mock.patch.object(
+                        util, "load_file", return_value=ca_certs_content
+                    )
+                )
 
                 cc_ca_certs.add_ca_certs(conf, [cert])
 
-                mock_write.assert_has_calls([
-                    mock.call(conf['ca_cert_full_path'],
-                              cert, mode=0o644)])
-                if conf['ca_cert_config'] is not None:
-                    mock_write.assert_has_calls([
-                        mock.call(conf['ca_cert_config'],
-                                  "%s\n%s\n" % (ca_certs_content,
-                                                conf['ca_cert_filename']),
-                                  omode="wb")])
-
-                    mock_load.assert_called_once_with(conf['ca_cert_config'])
+                mock_write.assert_has_calls(
+                    [mock.call(conf["ca_cert_full_path"], cert, mode=0o644)]
+                )
+                if conf["ca_cert_config"] is not None:
+                    mock_write.assert_has_calls(
+                        [
+                            mock.call(
+                                conf["ca_cert_config"],
+                                "%s\n%s\n"
+                                % (ca_certs_content, conf["ca_cert_filename"]),
+                                omode="wb",
+                            )
+                        ]
+                    )
+
+                    mock_load.assert_called_once_with(conf["ca_cert_config"])
 
     def test_single_cert_to_empty_existing_ca_file(self):
         """Test adding a single certificate to the trusted CAs
@@ -264,18 +282,23 @@ class TestAddCaCerts(TestCase):
 
         for distro_name in cc_ca_certs.distros:
             conf = cc_ca_certs._distro_ca_certs_configs(distro_name)
-            with mock.patch.object(util, 'write_file',
-                                   autospec=True) as m_write:
+            with mock.patch.object(
+                util, "write_file", autospec=True
+            ) as m_write:
 
                 cc_ca_certs.add_ca_certs(conf, [cert])
 
-                m_write.assert_has_calls([
-                    mock.call(conf['ca_cert_full_path'],
-                              cert, mode=0o644)])
-                if conf['ca_cert_config'] is not None:
-                    m_write.assert_has_calls([
-                        mock.call(conf['ca_cert_config'],
-                                  expected, omode="wb")])
+                m_write.assert_has_calls(
+                    [mock.call(conf["ca_cert_full_path"], cert, mode=0o644)]
+                )
+                if conf["ca_cert_config"] is not None:
+                    m_write.assert_has_calls(
+                        [
+                            mock.call(
+                                conf["ca_cert_config"], expected, omode="wb"
+                            )
+                        ]
+                    )
 
     def test_multiple_certs(self):
         """Test adding multiple certificates to the trusted CAs."""
@@ -290,45 +313,61 @@ class TestAddCaCerts(TestCase):
 
             with ExitStack() as mocks:
                 mock_write = mocks.enter_context(
-                    mock.patch.object(util, 'write_file'))
+                    mock.patch.object(util, "write_file")
+                )
                 mock_load = mocks.enter_context(
-                    mock.patch.object(util, 'load_file',
-                                      return_value=ca_certs_content))
+                    mock.patch.object(
+                        util, "load_file", return_value=ca_certs_content
+                    )
+                )
 
                 cc_ca_certs.add_ca_certs(conf, certs)
 
-                mock_write.assert_has_calls([
-                    mock.call(conf['ca_cert_full_path'],
-                              expected_cert_file, mode=0o644)])
-                if conf['ca_cert_config'] is not None:
-                    mock_write.assert_has_calls([
-                        mock.call(conf['ca_cert_config'],
-                                  "%s\n%s\n" % (ca_certs_content,
-                                                conf['ca_cert_filename']),
-                                  omode='wb')])
-
-                    mock_load.assert_called_once_with(conf['ca_cert_config'])
+                mock_write.assert_has_calls(
+                    [
+                        mock.call(
+                            conf["ca_cert_full_path"],
+                            expected_cert_file,
+                            mode=0o644,
+                        )
+                    ]
+                )
+                if conf["ca_cert_config"] is not None:
+                    mock_write.assert_has_calls(
+                        [
+                            mock.call(
+                                conf["ca_cert_config"],
+                                "%s\n%s\n"
+                                % (ca_certs_content, conf["ca_cert_filename"]),
+                                omode="wb",
+                            )
+                        ]
+                    )
+
+                    mock_load.assert_called_once_with(conf["ca_cert_config"])
 
 
 class TestUpdateCaCerts(unittest.TestCase):
     def test_commands(self):
         for distro_name in cc_ca_certs.distros:
             conf = cc_ca_certs._distro_ca_certs_configs(distro_name)
-            with mock.patch.object(subp, 'subp') as mockobj:
+            with mock.patch.object(subp, "subp") as mockobj:
                 cc_ca_certs.update_ca_certs(conf)
                 mockobj.assert_called_once_with(
-                    conf['ca_cert_update_cmd'], capture=False)
+                    conf["ca_cert_update_cmd"], capture=False
+                )
 
 
 class TestRemoveDefaultCaCerts(TestCase):
-
     def setUp(self):
         super(TestRemoveDefaultCaCerts, self).setUp()
         tmpdir = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, tmpdir)
-        self.paths = helpers.Paths({
-            'cloud_dir': tmpdir,
-        })
+        self.paths = helpers.Paths(
+            {
+                "cloud_dir": tmpdir,
+            }
+        )
 
     def test_commands(self):
         for distro_name in cc_ca_certs.distros:
@@ -336,26 +375,35 @@ class TestRemoveDefaultCaCerts(TestCase):
 
             with ExitStack() as mocks:
                 mock_delete = mocks.enter_context(
-                    mock.patch.object(util, 'delete_dir_contents'))
+                    mock.patch.object(util, "delete_dir_contents")
+                )
                 mock_write = mocks.enter_context(
-                    mock.patch.object(util, 'write_file'))
+                    mock.patch.object(util, "write_file")
+                )
                 mock_subp = mocks.enter_context(
-                    mock.patch.object(subp, 'subp'))
+                    mock.patch.object(subp, "subp")
+                )
 
                 cc_ca_certs.remove_default_ca_certs(distro_name, conf)
 
-                mock_delete.assert_has_calls([
-                    mock.call(conf['ca_cert_path']),
-                    mock.call(conf['ca_cert_system_path'])])
+                mock_delete.assert_has_calls(
+                    [
+                        mock.call(conf["ca_cert_path"]),
+                        mock.call(conf["ca_cert_system_path"]),
+                    ]
+                )
 
-                if conf['ca_cert_config'] is not None:
+                if conf["ca_cert_config"] is not None:
                     mock_write.assert_called_once_with(
-                        conf['ca_cert_config'], "", mode=0o644)
+                        conf["ca_cert_config"], "", mode=0o644
+                    )
 
-                if distro_name in ['debian', 'ubuntu']:
+                if distro_name in ["debian", "ubuntu"]:
                     mock_subp.assert_called_once_with(
-                        ('debconf-set-selections', '-'),
-                        "ca-certificates \
-ca-certificates/trust_new_crts select no")
+                        ("debconf-set-selections", "-"),
+                        "ca-certificates ca-certificates/trust_new_crts"
+                        " select no",
+                    )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_chef.py b/tests/unittests/config/test_cc_chef.py
index 1c90a4fc..835974e5 100644
--- a/tests/unittests/config/test_cc_chef.py
+++ b/tests/unittests/config/test_cc_chef.py
@@ -1,21 +1,20 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-import httpretty
 import json
 import logging
 import os
 
-from cloudinit.config import cc_chef
-from cloudinit import util
+import httpretty
 
+from cloudinit import util
+from cloudinit.config import cc_chef
 from tests.unittests.helpers import (
-    HttprettyTestCase,
     FilesystemMockingTestCase,
+    HttprettyTestCase,
+    cloud_init_project_dir,
     mock,
     skipIf,
-    cloud_init_project_dir,
 )
-
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -31,7 +30,6 @@ OMNIBUS_URL_HTTP = cc_chef.OMNIBUS_URL.replace("https:", "http:")
 
 
 class TestInstallChefOmnibus(HttprettyTestCase):
-
     def setUp(self):
         super(TestInstallChefOmnibus, self).setUp()
         self.new_root = self.tmp_dir()
@@ -41,70 +39,81 @@ class TestInstallChefOmnibus(HttprettyTestCase):
         """install_chef_from_omnibus calls subp_blob_in_tempfile."""
         response = b'#!/bin/bash\necho "Hi Mom"'
         httpretty.register_uri(
-            httpretty.GET, cc_chef.OMNIBUS_URL, body=response, status=200)
+            httpretty.GET, cc_chef.OMNIBUS_URL, body=response, status=200
+        )
         ret = (None, None)  # stdout, stderr but capture=False
 
-        with mock.patch("cloudinit.config.cc_chef.subp_blob_in_tempfile",
-                        return_value=ret) as m_subp_blob:
+        with mock.patch(
+            "cloudinit.config.cc_chef.subp_blob_in_tempfile", return_value=ret
+        ) as m_subp_blob:
             cc_chef.install_chef_from_omnibus()
         # admittedly whitebox, but assuming subp_blob_in_tempfile works
         # this should be fine.
         self.assertEqual(
-            [mock.call(blob=response, args=[], basename='chef-omnibus-install',
-                       capture=False)],
-            m_subp_blob.call_args_list)
-
-    @mock.patch('cloudinit.config.cc_chef.url_helper.readurl')
-    @mock.patch('cloudinit.config.cc_chef.subp_blob_in_tempfile')
+            [
+                mock.call(
+                    blob=response,
+                    args=[],
+                    basename="chef-omnibus-install",
+                    capture=False,
+                )
+            ],
+            m_subp_blob.call_args_list,
+        )
+
+    @mock.patch("cloudinit.config.cc_chef.url_helper.readurl")
+    @mock.patch("cloudinit.config.cc_chef.subp_blob_in_tempfile")
     def test_install_chef_from_omnibus_retries_url(self, m_subp_blob, m_rdurl):
         """install_chef_from_omnibus retries OMNIBUS_URL upon failure."""
 
         class FakeURLResponse(object):
             contents = '#!/bin/bash\necho "Hi Mom" > {0}/chef.out'.format(
-                self.new_root)
+                self.new_root
+            )
 
         m_rdurl.return_value = FakeURLResponse()
 
         cc_chef.install_chef_from_omnibus()
-        expected_kwargs = {'retries': cc_chef.OMNIBUS_URL_RETRIES,
-                           'url': cc_chef.OMNIBUS_URL}
+        expected_kwargs = {
+            "retries": cc_chef.OMNIBUS_URL_RETRIES,
+            "url": cc_chef.OMNIBUS_URL,
+        }
         self.assertCountEqual(expected_kwargs, m_rdurl.call_args_list[0][1])
         cc_chef.install_chef_from_omnibus(retries=10)
-        expected_kwargs = {'retries': 10,
-                           'url': cc_chef.OMNIBUS_URL}
+        expected_kwargs = {"retries": 10, "url": cc_chef.OMNIBUS_URL}
         self.assertCountEqual(expected_kwargs, m_rdurl.call_args_list[1][1])
         expected_subp_kwargs = {
-            'args': ['-v', '2.0'],
-            'basename': 'chef-omnibus-install',
-            'blob': m_rdurl.return_value.contents,
-            'capture': False
+            "args": ["-v", "2.0"],
+            "basename": "chef-omnibus-install",
+            "blob": m_rdurl.return_value.contents,
+            "capture": False,
         }
         self.assertCountEqual(
-            expected_subp_kwargs,
-            m_subp_blob.call_args_list[0][1])
+            expected_subp_kwargs, m_subp_blob.call_args_list[0][1]
+        )
 
     @mock.patch("cloudinit.config.cc_chef.OMNIBUS_URL", OMNIBUS_URL_HTTP)
-    @mock.patch('cloudinit.config.cc_chef.subp_blob_in_tempfile')
+    @mock.patch("cloudinit.config.cc_chef.subp_blob_in_tempfile")
     def test_install_chef_from_omnibus_has_omnibus_version(self, m_subp_blob):
         """install_chef_from_omnibus provides version arg to OMNIBUS_URL."""
-        chef_outfile = self.tmp_path('chef.out', self.new_root)
+        chef_outfile = self.tmp_path("chef.out", self.new_root)
         response = '#!/bin/bash\necho "Hi Mom" > {0}'.format(chef_outfile)
         httpretty.register_uri(
-            httpretty.GET, cc_chef.OMNIBUS_URL, body=response)
-        cc_chef.install_chef_from_omnibus(omnibus_version='2.0')
+            httpretty.GET, cc_chef.OMNIBUS_URL, body=response
+        )
+        cc_chef.install_chef_from_omnibus(omnibus_version="2.0")
 
         called_kwargs = m_subp_blob.call_args_list[0][1]
         expected_kwargs = {
-            'args': ['-v', '2.0'],
-            'basename': 'chef-omnibus-install',
-            'blob': response,
-            'capture': False
+            "args": ["-v", "2.0"],
+            "basename": "chef-omnibus-install",
+            "blob": response,
+            "capture": False,
         }
         self.assertCountEqual(expected_kwargs, called_kwargs)
 
 
 class TestChef(FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestChef, self).setUp()
         self.tmp = self.tmp_dir()
@@ -114,12 +123,13 @@ class TestChef(FilesystemMockingTestCase):
         self.patchOS(self.tmp)
 
         cfg = {}
-        cc_chef.handle('chef', cfg, get_cloud(), LOG, [])
+        cc_chef.handle("chef", cfg, get_cloud(), LOG, [])
         for d in cc_chef.CHEF_DIRS:
             self.assertFalse(os.path.isdir(d))
 
-    @skipIf(not os.path.isfile(CLIENT_TEMPL),
-            CLIENT_TEMPL + " is not available")
+    @skipIf(
+        not os.path.isfile(CLIENT_TEMPL), CLIENT_TEMPL + " is not available"
+    )
     def test_basic_config(self):
         """
         test basic config looks sane
@@ -147,26 +157,27 @@ class TestChef(FilesystemMockingTestCase):
         self.patchUtils(self.tmp)
         self.patchOS(self.tmp)
 
-        util.write_file('/etc/cloud/templates/chef_client.rb.tmpl', tpl_file)
+        util.write_file("/etc/cloud/templates/chef_client.rb.tmpl", tpl_file)
         cfg = {
-            'chef': {
-                'chef_license': "accept",
-                'server_url': 'localhost',
-                'validation_name': 'bob',
-                'validation_key': "/etc/chef/vkey.pem",
-                'validation_cert': "this is my cert",
-                'encrypted_data_bag_secret':
-                    '/etc/chef/encrypted_data_bag_secret'
+            "chef": {
+                "chef_license": "accept",
+                "server_url": "localhost",
+                "validation_name": "bob",
+                "validation_key": "/etc/chef/vkey.pem",
+                "validation_cert": "this is my cert",
+                "encrypted_data_bag_secret": (
+                    "/etc/chef/encrypted_data_bag_secret"
+                ),
             },
         }
-        cc_chef.handle('chef', cfg, get_cloud(), LOG, [])
+        cc_chef.handle("chef", cfg, get_cloud(), LOG, [])
         for d in cc_chef.CHEF_DIRS:
             self.assertTrue(os.path.isdir(d))
         c = util.load_file(cc_chef.CHEF_RB_PATH)
 
         # the content of these keys is not expected to be rendered to tmpl
-        unrendered_keys = ('validation_cert',)
-        for k, v in cfg['chef'].items():
+        unrendered_keys = ("validation_cert",)
+        for k, v in cfg["chef"].items():
             if k in unrendered_keys:
                 continue
             self.assertIn(v, c)
@@ -174,7 +185,7 @@ class TestChef(FilesystemMockingTestCase):
             if k in unrendered_keys:
                 continue
             # the value from the cfg overrides that in the default
-            val = cfg['chef'].get(k, v)
+            val = cfg["chef"].get(k, v)
             if isinstance(val, str):
                 self.assertIn(val, c)
         c = util.load_file(cc_chef.CHEF_FB_PATH)
@@ -185,64 +196,68 @@ class TestChef(FilesystemMockingTestCase):
         self.patchOS(self.tmp)
 
         cfg = {
-            'chef': {
-                'server_url': 'localhost',
-                'validation_name': 'bob',
-                'run_list': ['a', 'b', 'c'],
-                'initial_attributes': {
-                    'c': 'd',
-                }
+            "chef": {
+                "server_url": "localhost",
+                "validation_name": "bob",
+                "run_list": ["a", "b", "c"],
+                "initial_attributes": {
+                    "c": "d",
+                },
             },
         }
-        cc_chef.handle('chef', cfg, get_cloud(), LOG, [])
+        cc_chef.handle("chef", cfg, get_cloud(), LOG, [])
         c = util.load_file(cc_chef.CHEF_FB_PATH)
         self.assertEqual(
             {
-                'run_list': ['a', 'b', 'c'],
-                'c': 'd',
-            }, json.loads(c))
+                "run_list": ["a", "b", "c"],
+                "c": "d",
+            },
+            json.loads(c),
+        )
 
-    @skipIf(not os.path.isfile(CLIENT_TEMPL),
-            CLIENT_TEMPL + " is not available")
+    @skipIf(
+        not os.path.isfile(CLIENT_TEMPL), CLIENT_TEMPL + " is not available"
+    )
     def test_template_deletes(self):
         tpl_file = util.load_file(CLIENT_TEMPL)
         self.patchUtils(self.tmp)
         self.patchOS(self.tmp)
 
-        util.write_file('/etc/cloud/templates/chef_client.rb.tmpl', tpl_file)
+        util.write_file("/etc/cloud/templates/chef_client.rb.tmpl", tpl_file)
         cfg = {
-            'chef': {
-                'server_url': 'localhost',
-                'validation_name': 'bob',
-                'json_attribs': None,
-                'show_time': None,
+            "chef": {
+                "server_url": "localhost",
+                "validation_name": "bob",
+                "json_attribs": None,
+                "show_time": None,
             },
         }
-        cc_chef.handle('chef', cfg, get_cloud(), LOG, [])
+        cc_chef.handle("chef", cfg, get_cloud(), LOG, [])
         c = util.load_file(cc_chef.CHEF_RB_PATH)
-        self.assertNotIn('json_attribs', c)
-        self.assertNotIn('Formatter.show_time', c)
+        self.assertNotIn("json_attribs", c)
+        self.assertNotIn("Formatter.show_time", c)
 
-    @skipIf(not os.path.isfile(CLIENT_TEMPL),
-            CLIENT_TEMPL + " is not available")
+    @skipIf(
+        not os.path.isfile(CLIENT_TEMPL), CLIENT_TEMPL + " is not available"
+    )
     def test_validation_cert_and_validation_key(self):
         # test validation_cert content is written to validation_key path
         tpl_file = util.load_file(CLIENT_TEMPL)
         self.patchUtils(self.tmp)
         self.patchOS(self.tmp)
 
-        util.write_file('/etc/cloud/templates/chef_client.rb.tmpl', tpl_file)
-        v_path = '/etc/chef/vkey.pem'
-        v_cert = 'this is my cert'
+        util.write_file("/etc/cloud/templates/chef_client.rb.tmpl", tpl_file)
+        v_path = "/etc/chef/vkey.pem"
+        v_cert = "this is my cert"
         cfg = {
-            'chef': {
-                'server_url': 'localhost',
-                'validation_name': 'bob',
-                'validation_key': v_path,
-                'validation_cert': v_cert
+            "chef": {
+                "server_url": "localhost",
+                "validation_name": "bob",
+                "validation_key": v_path,
+                "validation_cert": v_cert,
             },
         }
-        cc_chef.handle('chef', cfg, get_cloud(), LOG, [])
+        cc_chef.handle("chef", cfg, get_cloud(), LOG, [])
         content = util.load_file(cc_chef.CHEF_RB_PATH)
         self.assertIn(v_path, content)
         util.load_file(v_path)
@@ -254,23 +269,24 @@ class TestChef(FilesystemMockingTestCase):
         self.patchUtils(self.tmp)
         self.patchOS(self.tmp)
 
-        v_path = '/etc/chef/vkey.pem'
+        v_path = "/etc/chef/vkey.pem"
         v_cert = "system"
         expected_cert = "this is the system file certificate"
         cfg = {
-            'chef': {
-                'server_url': 'localhost',
-                'validation_name': 'bob',
-                'validation_key': v_path,
-                'validation_cert': v_cert
+            "chef": {
+                "server_url": "localhost",
+                "validation_name": "bob",
+                "validation_key": v_path,
+                "validation_cert": v_cert,
             },
         }
-        util.write_file('/etc/cloud/templates/chef_client.rb.tmpl', tpl_file)
+        util.write_file("/etc/cloud/templates/chef_client.rb.tmpl", tpl_file)
         util.write_file(v_path, expected_cert)
-        cc_chef.handle('chef', cfg, get_cloud(), LOG, [])
+        cc_chef.handle("chef", cfg, get_cloud(), LOG, [])
         content = util.load_file(cc_chef.CHEF_RB_PATH)
         self.assertIn(v_path, content)
         util.load_file(v_path)
         self.assertEqual(expected_cert, util.load_file(v_path))
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_debug.py b/tests/unittests/config/test_cc_debug.py
index 174f772f..79a88561 100644
--- a/tests/unittests/config/test_cc_debug.py
+++ b/tests/unittests/config/test_cc_debug.py
@@ -7,14 +7,13 @@ import tempfile
 
 from cloudinit import util
 from cloudinit.config import cc_debug
-from tests.unittests.helpers import (FilesystemMockingTestCase, mock)
-
+from tests.unittests.helpers import FilesystemMockingTestCase, mock
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
 
 
-@mock.patch('cloudinit.distros.debian.read_system_locale')
+@mock.patch("cloudinit.distros.debian.read_system_locale")
 class TestDebug(FilesystemMockingTestCase):
     def setUp(self):
         super(TestDebug, self).setUp()
@@ -23,37 +22,39 @@ class TestDebug(FilesystemMockingTestCase):
         self.patchUtils(self.new_root)
 
     def test_debug_write(self, m_locale):
-        m_locale.return_value = 'en_US.UTF-8'
+        m_locale.return_value = "en_US.UTF-8"
         cfg = {
-            'abc': '123',
-            'c': '\u20a0',
-            'debug': {
-                'verbose': True,
+            "abc": "123",
+            "c": "\u20a0",
+            "debug": {
+                "verbose": True,
                 # Does not actually write here due to mocking...
-                'output': '/var/log/cloud-init-debug.log',
+                "output": "/var/log/cloud-init-debug.log",
             },
         }
         cc = get_cloud()
-        cc_debug.handle('cc_debug', cfg, cc, LOG, [])
-        contents = util.load_file('/var/log/cloud-init-debug.log')
+        cc_debug.handle("cc_debug", cfg, cc, LOG, [])
+        contents = util.load_file("/var/log/cloud-init-debug.log")
         # Some basic sanity tests...
         self.assertNotEqual(0, len(contents))
         for k in cfg.keys():
             self.assertIn(k, contents)
 
     def test_debug_no_write(self, m_locale):
-        m_locale.return_value = 'en_US.UTF-8'
+        m_locale.return_value = "en_US.UTF-8"
         cfg = {
-            'abc': '123',
-            'debug': {
-                'verbose': False,
+            "abc": "123",
+            "debug": {
+                "verbose": False,
                 # Does not actually write here due to mocking...
-                'output': '/var/log/cloud-init-debug.log',
+                "output": "/var/log/cloud-init-debug.log",
             },
         }
         cc = get_cloud()
-        cc_debug.handle('cc_debug', cfg, cc, LOG, [])
-        self.assertRaises(IOError,
-                          util.load_file, '/var/log/cloud-init-debug.log')
+        cc_debug.handle("cc_debug", cfg, cc, LOG, [])
+        self.assertRaises(
+            IOError, util.load_file, "/var/log/cloud-init-debug.log"
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_disable_ec2_metadata.py b/tests/unittests/config/test_cc_disable_ec2_metadata.py
index 7a794845..3c3313a7 100644
--- a/tests/unittests/config/test_cc_disable_ec2_metadata.py
+++ b/tests/unittests/config/test_cc_disable_ec2_metadata.py
@@ -2,47 +2,49 @@
 
 """Tests cc_disable_ec2_metadata handler"""
 
-import cloudinit.config.cc_disable_ec2_metadata as ec2_meta
+import logging
 
+import cloudinit.config.cc_disable_ec2_metadata as ec2_meta
 from tests.unittests.helpers import CiTestCase, mock
 
-import logging
-
 LOG = logging.getLogger(__name__)
 
-DISABLE_CFG = {'disable_ec2_metadata': 'true'}
+DISABLE_CFG = {"disable_ec2_metadata": "true"}
 
 
 class TestEC2MetadataRoute(CiTestCase):
-
-    @mock.patch('cloudinit.config.cc_disable_ec2_metadata.subp.which')
-    @mock.patch('cloudinit.config.cc_disable_ec2_metadata.subp.subp')
+    @mock.patch("cloudinit.config.cc_disable_ec2_metadata.subp.which")
+    @mock.patch("cloudinit.config.cc_disable_ec2_metadata.subp.subp")
     def test_disable_ifconfig(self, m_subp, m_which):
         """Set the route if ifconfig command is available"""
-        m_which.side_effect = lambda x: x if x == 'ifconfig' else None
-        ec2_meta.handle('foo', DISABLE_CFG, None, LOG, None)
+        m_which.side_effect = lambda x: x if x == "ifconfig" else None
+        ec2_meta.handle("foo", DISABLE_CFG, None, LOG, None)
         m_subp.assert_called_with(
-            ['route', 'add', '-host', '169.254.169.254', 'reject'],
-            capture=False)
+            ["route", "add", "-host", "169.254.169.254", "reject"],
+            capture=False,
+        )
 
-    @mock.patch('cloudinit.config.cc_disable_ec2_metadata.subp.which')
-    @mock.patch('cloudinit.config.cc_disable_ec2_metadata.subp.subp')
+    @mock.patch("cloudinit.config.cc_disable_ec2_metadata.subp.which")
+    @mock.patch("cloudinit.config.cc_disable_ec2_metadata.subp.subp")
     def test_disable_ip(self, m_subp, m_which):
         """Set the route if ip command is available"""
-        m_which.side_effect = lambda x: x if x == 'ip' else None
-        ec2_meta.handle('foo', DISABLE_CFG, None, LOG, None)
+        m_which.side_effect = lambda x: x if x == "ip" else None
+        ec2_meta.handle("foo", DISABLE_CFG, None, LOG, None)
         m_subp.assert_called_with(
-            ['ip', 'route', 'add', 'prohibit', '169.254.169.254'],
-            capture=False)
+            ["ip", "route", "add", "prohibit", "169.254.169.254"],
+            capture=False,
+        )
 
-    @mock.patch('cloudinit.config.cc_disable_ec2_metadata.subp.which')
-    @mock.patch('cloudinit.config.cc_disable_ec2_metadata.subp.subp')
+    @mock.patch("cloudinit.config.cc_disable_ec2_metadata.subp.which")
+    @mock.patch("cloudinit.config.cc_disable_ec2_metadata.subp.subp")
     def test_disable_no_tool(self, m_subp, m_which):
         """Log error when neither route nor ip commands are available"""
         m_which.return_value = None  # Find neither ifconfig nor ip
-        ec2_meta.handle('foo', DISABLE_CFG, None, LOG, None)
+        ec2_meta.handle("foo", DISABLE_CFG, None, LOG, None)
         self.assertEqual(
-            [mock.call('ip'), mock.call('ifconfig')], m_which.call_args_list)
+            [mock.call("ip"), mock.call("ifconfig")], m_which.call_args_list
+        )
         m_subp.assert_not_called()
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_disk_setup.py b/tests/unittests/config/test_cc_disk_setup.py
index fa565559..8a8d7195 100644
--- a/tests/unittests/config/test_cc_disk_setup.py
+++ b/tests/unittests/config/test_cc_disk_setup.py
@@ -3,19 +3,20 @@
 import random
 
 from cloudinit.config import cc_disk_setup
-from tests.unittests.helpers import CiTestCase, ExitStack, mock, TestCase
+from tests.unittests.helpers import CiTestCase, ExitStack, TestCase, mock
 
 
 class TestIsDiskUsed(TestCase):
-
     def setUp(self):
         super(TestIsDiskUsed, self).setUp()
         self.patches = ExitStack()
-        mod_name = 'cloudinit.config.cc_disk_setup'
+        mod_name = "cloudinit.config.cc_disk_setup"
         self.enumerate_disk = self.patches.enter_context(
-            mock.patch('{0}.enumerate_disk'.format(mod_name)))
+            mock.patch("{0}.enumerate_disk".format(mod_name))
+        )
         self.check_fs = self.patches.enter_context(
-            mock.patch('{0}.check_fs'.format(mod_name)))
+            mock.patch("{0}.check_fs".format(mod_name))
+        )
 
     def tearDown(self):
         super(TestIsDiskUsed, self).tearDown()
@@ -29,7 +30,10 @@ class TestIsDiskUsed(TestCase):
     def test_valid_filesystem_returns_true(self):
         self.enumerate_disk.return_value = (mock.MagicMock() for _ in range(1))
         self.check_fs.return_value = (
-            mock.MagicMock(), 'ext4', mock.MagicMock())
+            mock.MagicMock(),
+            "ext4",
+            mock.MagicMock(),
+        )
         self.assertTrue(cc_disk_setup.is_disk_used(mock.MagicMock()))
 
     def test_one_child_nodes_and_no_fs_returns_false(self):
@@ -39,12 +43,12 @@ class TestIsDiskUsed(TestCase):
 
 
 class TestGetMbrHddSize(TestCase):
-
     def setUp(self):
         super(TestGetMbrHddSize, self).setUp()
         self.patches = ExitStack()
         self.subp = self.patches.enter_context(
-            mock.patch.object(cc_disk_setup.subp, 'subp'))
+            mock.patch.object(cc_disk_setup.subp, "subp")
+        )
 
     def tearDown(self):
         super(TestGetMbrHddSize, self).tearDown()
@@ -53,11 +57,11 @@ class TestGetMbrHddSize(TestCase):
     def _configure_subp_mock(self, hdd_size_in_bytes, sector_size_in_bytes):
         def _subp(cmd, *args, **kwargs):
             self.assertEqual(3, len(cmd))
-            if '--getsize64' in cmd:
+            if "--getsize64" in cmd:
                 return hdd_size_in_bytes, None
-            elif '--getss' in cmd:
+            elif "--getss" in cmd:
                 return sector_size_in_bytes, None
-            raise Exception('Unexpected blockdev command called')
+            raise Exception("Unexpected blockdev command called")
 
         self.subp.side_effect = _subp
 
@@ -65,8 +69,9 @@ class TestGetMbrHddSize(TestCase):
         size_in_bytes = random.randint(10000, 10000000) * 512
         size_in_sectors = size_in_bytes / sector_size
         self._configure_subp_mock(size_in_bytes, sector_size)
-        self.assertEqual(size_in_sectors,
-                         cc_disk_setup.get_hdd_size('/dev/sda1'))
+        self.assertEqual(
+            size_in_sectors, cc_disk_setup.get_hdd_size("/dev/sda1")
+        )
 
     def test_size_for_512_byte_sectors(self):
         self._test_for_sector_size(512)
@@ -82,98 +87,116 @@ class TestGetMbrHddSize(TestCase):
 
 
 class TestGetPartitionMbrLayout(TestCase):
-
     def test_single_partition_using_boolean(self):
-        self.assertEqual('0,',
-                         cc_disk_setup.get_partition_mbr_layout(1000, True))
+        self.assertEqual(
+            "0,", cc_disk_setup.get_partition_mbr_layout(1000, True)
+        )
 
     def test_single_partition_using_list(self):
         disk_size = random.randint(1000000, 1000000000000)
         self.assertEqual(
-            ',,83',
-            cc_disk_setup.get_partition_mbr_layout(disk_size, [100]))
+            ",,83", cc_disk_setup.get_partition_mbr_layout(disk_size, [100])
+        )
 
     def test_half_and_half(self):
         disk_size = random.randint(1000000, 1000000000000)
         expected_partition_size = int(float(disk_size) / 2)
         self.assertEqual(
-            ',{0},83\n,,83'.format(expected_partition_size),
-            cc_disk_setup.get_partition_mbr_layout(disk_size, [50, 50]))
+            ",{0},83\n,,83".format(expected_partition_size),
+            cc_disk_setup.get_partition_mbr_layout(disk_size, [50, 50]),
+        )
 
     def test_thirds_with_different_partition_type(self):
         disk_size = random.randint(1000000, 1000000000000)
         expected_partition_size = int(float(disk_size) * 0.33)
         self.assertEqual(
-            ',{0},83\n,,82'.format(expected_partition_size),
-            cc_disk_setup.get_partition_mbr_layout(disk_size, [33, [66, 82]]))
+            ",{0},83\n,,82".format(expected_partition_size),
+            cc_disk_setup.get_partition_mbr_layout(disk_size, [33, [66, 82]]),
+        )
 
 
 class TestUpdateFsSetupDevices(TestCase):
     def test_regression_1634678(self):
         # Cf. https://bugs.launchpad.net/cloud-init/+bug/1634678
         fs_setup = {
-            'partition': 'auto',
-            'device': '/dev/xvdb1',
-            'overwrite': False,
-            'label': 'test',
-            'filesystem': 'ext4'
+            "partition": "auto",
+            "device": "/dev/xvdb1",
+            "overwrite": False,
+            "label": "test",
+            "filesystem": "ext4",
         }
 
-        cc_disk_setup.update_fs_setup_devices([fs_setup],
-                                              lambda device: device)
+        cc_disk_setup.update_fs_setup_devices(
+            [fs_setup], lambda device: device
+        )
 
-        self.assertEqual({
-            '_origname': '/dev/xvdb1',
-            'partition': 'auto',
-            'device': '/dev/xvdb1',
-            'overwrite': False,
-            'label': 'test',
-            'filesystem': 'ext4'
-        }, fs_setup)
+        self.assertEqual(
+            {
+                "_origname": "/dev/xvdb1",
+                "partition": "auto",
+                "device": "/dev/xvdb1",
+                "overwrite": False,
+                "label": "test",
+                "filesystem": "ext4",
+            },
+            fs_setup,
+        )
 
     def test_dotted_devname(self):
         fs_setup = {
-            'partition': 'auto',
-            'device': 'ephemeral0.0',
-            'label': 'test2',
-            'filesystem': 'xfs'
+            "partition": "auto",
+            "device": "ephemeral0.0",
+            "label": "test2",
+            "filesystem": "xfs",
         }
 
-        cc_disk_setup.update_fs_setup_devices([fs_setup],
-                                              lambda device: device)
+        cc_disk_setup.update_fs_setup_devices(
+            [fs_setup], lambda device: device
+        )
 
-        self.assertEqual({
-            '_origname': 'ephemeral0.0',
-            '_partition': 'auto',
-            'partition': '0',
-            'device': 'ephemeral0',
-            'label': 'test2',
-            'filesystem': 'xfs'
-        }, fs_setup)
+        self.assertEqual(
+            {
+                "_origname": "ephemeral0.0",
+                "_partition": "auto",
+                "partition": "0",
+                "device": "ephemeral0",
+                "label": "test2",
+                "filesystem": "xfs",
+            },
+            fs_setup,
+        )
 
     def test_dotted_devname_populates_partition(self):
         fs_setup = {
-            'device': 'ephemeral0.1',
-            'label': 'test2',
-            'filesystem': 'xfs'
+            "device": "ephemeral0.1",
+            "label": "test2",
+            "filesystem": "xfs",
         }
-        cc_disk_setup.update_fs_setup_devices([fs_setup],
-                                              lambda device: device)
-        self.assertEqual({
-            '_origname': 'ephemeral0.1',
-            'device': 'ephemeral0',
-            'partition': '1',
-            'label': 'test2',
-            'filesystem': 'xfs'
-        }, fs_setup)
-
-
-@mock.patch('cloudinit.config.cc_disk_setup.assert_and_settle_device',
-            return_value=None)
-@mock.patch('cloudinit.config.cc_disk_setup.find_device_node',
-            return_value=('/dev/xdb1', False))
-@mock.patch('cloudinit.config.cc_disk_setup.device_type', return_value=None)
-@mock.patch('cloudinit.config.cc_disk_setup.subp.subp', return_value=('', ''))
+        cc_disk_setup.update_fs_setup_devices(
+            [fs_setup], lambda device: device
+        )
+        self.assertEqual(
+            {
+                "_origname": "ephemeral0.1",
+                "device": "ephemeral0",
+                "partition": "1",
+                "label": "test2",
+                "filesystem": "xfs",
+            },
+            fs_setup,
+        )
+
+
+@mock.patch(
+    "cloudinit.config.cc_disk_setup.assert_and_settle_device",
+    return_value=None,
+)
+@mock.patch(
+    "cloudinit.config.cc_disk_setup.find_device_node",
+    return_value=("/dev/xdb1", False),
+)
+@mock.patch("cloudinit.config.cc_disk_setup.device_type", return_value=None)
+@mock.patch("cloudinit.config.cc_disk_setup.subp.subp", return_value=("", ""))
 class TestMkfsCommandHandling(CiTestCase):
 
     with_logs = True
@@ -181,63 +204,84 @@ class TestMkfsCommandHandling(CiTestCase):
     def test_with_cmd(self, subp, *args):
         """mkfs honors cmd and logs warnings when extra_opts or overwrite are
         provided."""
-        cc_disk_setup.mkfs({
-            'cmd': 'mkfs -t %(filesystem)s -L %(label)s %(device)s',
-            'filesystem': 'ext4',
-            'device': '/dev/xdb1',
-            'label': 'with_cmd',
-            'extra_opts': ['should', 'generate', 'warning'],
-            'overwrite': 'should generate warning too'
-        })
+        cc_disk_setup.mkfs(
+            {
+                "cmd": "mkfs -t %(filesystem)s -L %(label)s %(device)s",
+                "filesystem": "ext4",
+                "device": "/dev/xdb1",
+                "label": "with_cmd",
+                "extra_opts": ["should", "generate", "warning"],
+                "overwrite": "should generate warning too",
+            }
+        )
 
         self.assertIn(
-            'extra_opts ' +
-            'ignored because cmd was specified: mkfs -t ext4 -L with_cmd ' +
-            '/dev/xdb1',
-            self.logs.getvalue())
+            "extra_opts "
+            + "ignored because cmd was specified: mkfs -t ext4 -L with_cmd "
+            + "/dev/xdb1",
+            self.logs.getvalue(),
+        )
         self.assertIn(
-            'overwrite ' +
-            'ignored because cmd was specified: mkfs -t ext4 -L with_cmd ' +
-            '/dev/xdb1',
-            self.logs.getvalue())
+            "overwrite "
+            + "ignored because cmd was specified: mkfs -t ext4 -L with_cmd "
+            + "/dev/xdb1",
+            self.logs.getvalue(),
+        )
 
         subp.assert_called_once_with(
-            'mkfs -t ext4 -L with_cmd /dev/xdb1', shell=True)
+            "mkfs -t ext4 -L with_cmd /dev/xdb1", shell=True
+        )
 
-    @mock.patch('cloudinit.config.cc_disk_setup.subp.which')
+    @mock.patch("cloudinit.config.cc_disk_setup.subp.which")
     def test_overwrite_and_extra_opts_without_cmd(self, m_which, subp, *args):
         """mkfs observes extra_opts and overwrite settings when cmd is not
         present."""
-        m_which.side_effect = lambda p: {'mkfs.ext4': '/sbin/mkfs.ext4'}[p]
-        cc_disk_setup.mkfs({
-            'filesystem': 'ext4',
-            'device': '/dev/xdb1',
-            'label': 'without_cmd',
-            'extra_opts': ['are', 'added'],
-            'overwrite': True
-        })
+        m_which.side_effect = lambda p: {"mkfs.ext4": "/sbin/mkfs.ext4"}[p]
+        cc_disk_setup.mkfs(
+            {
+                "filesystem": "ext4",
+                "device": "/dev/xdb1",
+                "label": "without_cmd",
+                "extra_opts": ["are", "added"],
+                "overwrite": True,
+            }
+        )
 
         subp.assert_called_once_with(
-            ['/sbin/mkfs.ext4', '/dev/xdb1',
-             '-L', 'without_cmd', '-F', 'are', 'added'],
-            shell=False)
-
-    @mock.patch('cloudinit.config.cc_disk_setup.subp.which')
+            [
+                "/sbin/mkfs.ext4",
+                "/dev/xdb1",
+                "-L",
+                "without_cmd",
+                "-F",
+                "are",
+                "added",
+            ],
+            shell=False,
+        )
+
+    @mock.patch("cloudinit.config.cc_disk_setup.subp.which")
     def test_mkswap(self, m_which, subp, *args):
         """mkfs observes extra_opts and overwrite settings when cmd is not
         present."""
-        m_which.side_effect = iter([None, '/sbin/mkswap'])
-        cc_disk_setup.mkfs({
-            'filesystem': 'swap',
-            'device': '/dev/xdb1',
-            'label': 'swap',
-            'overwrite': True,
-        })
-
-        self.assertEqual([mock.call('mkfs.swap'), mock.call('mkswap')],
-                         m_which.call_args_list)
+        m_which.side_effect = iter([None, "/sbin/mkswap"])
+        cc_disk_setup.mkfs(
+            {
+                "filesystem": "swap",
+                "device": "/dev/xdb1",
+                "label": "swap",
+                "overwrite": True,
+            }
+        )
+
+        self.assertEqual(
+            [mock.call("mkfs.swap"), mock.call("mkswap")],
+            m_which.call_args_list,
+        )
         subp.assert_called_once_with(
-            ['/sbin/mkswap', '/dev/xdb1', '-L', 'swap', '-f'], shell=False)
+            ["/sbin/mkswap", "/dev/xdb1", "-L", "swap", "-f"], shell=False
+        )
+
 
 #
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_growpart.py b/tests/unittests/config/test_cc_growpart.py
index b007f24f..ba66f136 100644
--- a/tests/unittests/config/test_cc_growpart.py
+++ b/tests/unittests/config/test_cc_growpart.py
@@ -1,21 +1,18 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import cloud
-from cloudinit.config import cc_growpart
-from cloudinit import subp
-from cloudinit import temp_utils
-
-from tests.unittests.helpers import TestCase
-
 import errno
 import logging
 import os
-import shutil
 import re
+import shutil
+import stat
 import unittest
 from contextlib import ExitStack
 from unittest import mock
-import stat
+
+from cloudinit import cloud, subp, temp_utils
+from cloudinit.config import cc_growpart
+from tests.unittests.helpers import TestCase
 
 # growpart:
 #   mode: auto  # off, on, auto, 'growpart'
@@ -62,7 +59,8 @@ usage: gpart add -t type [-a alignment] [-b start] <SNIP> geom
 
 
 class Dir:
-    '''Stub object'''
+    """Stub object"""
+
     def __init__(self, name):
         self.name = name
         self.st_mode = name
@@ -75,9 +73,13 @@ class Dir:
 
 
 class Scanner:
-    '''Stub object'''
+    """Stub object"""
+
     def __enter__(self):
-        return (Dir(''), Dir(''),)
+        return (
+            Dir(""),
+            Dir(""),
+        )
 
     def __exit__(self, *args):
         pass
@@ -97,11 +99,12 @@ class TestDisabled(unittest.TestCase):
         # Test that nothing is done if mode is off.
 
         # this really only verifies that resizer_factory isn't called
-        config = {'growpart': {'mode': 'off'}}
+        config = {"growpart": {"mode": "off"}}
 
-        with mock.patch.object(cc_growpart, 'resizer_factory') as mockobj:
-            self.handle(self.name, config, self.cloud_init, self.log,
-                        self.args)
+        with mock.patch.object(cc_growpart, "resizer_factory") as mockobj:
+            self.handle(
+                self.name, config, self.cloud_init, self.log, self.args
+            )
             self.assertEqual(mockobj.call_count, 0)
 
 
@@ -116,9 +119,9 @@ class TestConfig(TestCase):
 
         self.cloud_init = None
         self.handle = cc_growpart.handle
-        self.tmppath = '/tmp/cloudinit-test-file'
-        self.tmpdir = os.scandir('/tmp')
-        self.tmpfile = open(self.tmppath, 'w')
+        self.tmppath = "/tmp/cloudinit-test-file"
+        self.tmpdir = os.scandir("/tmp")
+        self.tmpfile = open(self.tmppath, "w")
 
     def tearDown(self):
         self.tmpfile.close()
@@ -127,110 +130,143 @@ class TestConfig(TestCase):
     @mock.patch.dict("os.environ", clear=True)
     def test_no_resizers_auto_is_fine(self):
         with mock.patch.object(
-                subp, 'subp',
-                return_value=(HELP_GROWPART_NO_RESIZE, "")) as mockobj:
-
-            config = {'growpart': {'mode': 'auto'}}
-            self.handle(self.name, config, self.cloud_init, self.log,
-                        self.args)
-
-            mockobj.assert_has_calls([
-                mock.call(['growpart', '--help'], env={'LANG': 'C'}),
-                mock.call(['gpart', 'help'], env={'LANG': 'C'}, rcs=[0, 1])])
+            subp, "subp", return_value=(HELP_GROWPART_NO_RESIZE, "")
+        ) as mockobj:
+
+            config = {"growpart": {"mode": "auto"}}
+            self.handle(
+                self.name, config, self.cloud_init, self.log, self.args
+            )
+
+            mockobj.assert_has_calls(
+                [
+                    mock.call(["growpart", "--help"], env={"LANG": "C"}),
+                    mock.call(
+                        ["gpart", "help"], env={"LANG": "C"}, rcs=[0, 1]
+                    ),
+                ]
+            )
 
     @mock.patch.dict("os.environ", clear=True)
     def test_no_resizers_mode_growpart_is_exception(self):
         with mock.patch.object(
-                subp, 'subp',
-                return_value=(HELP_GROWPART_NO_RESIZE, "")) as mockobj:
-            config = {'growpart': {'mode': "growpart"}}
+            subp, "subp", return_value=(HELP_GROWPART_NO_RESIZE, "")
+        ) as mockobj:
+            config = {"growpart": {"mode": "growpart"}}
             self.assertRaises(
-                ValueError, self.handle, self.name, config,
-                self.cloud_init, self.log, self.args)
+                ValueError,
+                self.handle,
+                self.name,
+                config,
+                self.cloud_init,
+                self.log,
+                self.args,
+            )
 
             mockobj.assert_called_once_with(
-                ['growpart', '--help'], env={'LANG': 'C'})
+                ["growpart", "--help"], env={"LANG": "C"}
+            )
 
     @mock.patch.dict("os.environ", clear=True)
     def test_mode_auto_prefers_growpart(self):
         with mock.patch.object(
-                subp, 'subp',
-                return_value=(HELP_GROWPART_RESIZE, "")) as mockobj:
+            subp, "subp", return_value=(HELP_GROWPART_RESIZE, "")
+        ) as mockobj:
             ret = cc_growpart.resizer_factory(mode="auto")
             self.assertIsInstance(ret, cc_growpart.ResizeGrowPart)
 
             mockobj.assert_called_once_with(
-                ['growpart', '--help'], env={'LANG': 'C'})
-
-    @mock.patch.dict("os.environ", {'LANG': 'cs_CZ.UTF-8'}, clear=True)
-    @mock.patch.object(temp_utils, 'mkdtemp', return_value='/tmp/much-random')
-    @mock.patch.object(stat, 'S_ISDIR', return_value=False)
-    @mock.patch.object(os.path, 'samestat', return_value=True)
-    @mock.patch.object(os.path, "join", return_value='/tmp')
-    @mock.patch.object(os, 'scandir', return_value=Scanner())
-    @mock.patch.object(os, 'mkdir')
-    @mock.patch.object(os, 'unlink')
-    @mock.patch.object(os, 'rmdir')
-    @mock.patch.object(os, 'open', return_value=1)
-    @mock.patch.object(os, 'close')
-    @mock.patch.object(shutil, 'rmtree')
-    @mock.patch.object(os, 'lseek', return_value=1024)
-    @mock.patch.object(os, 'lstat', return_value='interesting metadata')
+                ["growpart", "--help"], env={"LANG": "C"}
+            )
+
+    @mock.patch.dict("os.environ", {"LANG": "cs_CZ.UTF-8"}, clear=True)
+    @mock.patch.object(temp_utils, "mkdtemp", return_value="/tmp/much-random")
+    @mock.patch.object(stat, "S_ISDIR", return_value=False)
+    @mock.patch.object(os.path, "samestat", return_value=True)
+    @mock.patch.object(os.path, "join", return_value="/tmp")
+    @mock.patch.object(os, "scandir", return_value=Scanner())
+    @mock.patch.object(os, "mkdir")
+    @mock.patch.object(os, "unlink")
+    @mock.patch.object(os, "rmdir")
+    @mock.patch.object(os, "open", return_value=1)
+    @mock.patch.object(os, "close")
+    @mock.patch.object(shutil, "rmtree")
+    @mock.patch.object(os, "lseek", return_value=1024)
+    @mock.patch.object(os, "lstat", return_value="interesting metadata")
     def test_force_lang_check_tempfile(self, *args, **kwargs):
         with mock.patch.object(
-                subp,
-                'subp',
-                return_value=(HELP_GROWPART_RESIZE, "")) as mockobj:
+            subp, "subp", return_value=(HELP_GROWPART_RESIZE, "")
+        ) as mockobj:
 
             ret = cc_growpart.resizer_factory(mode="auto")
             self.assertIsInstance(ret, cc_growpart.ResizeGrowPart)
-            diskdev = '/dev/sdb'
+            diskdev = "/dev/sdb"
             partnum = 1
-            partdev = '/dev/sdb'
+            partdev = "/dev/sdb"
             ret.resize(diskdev, partnum, partdev)
-        mockobj.assert_has_calls([
-            mock.call(
-                ["growpart", '--dry-run', diskdev, partnum],
-                env={'LANG': 'C', 'TMPDIR': '/tmp'}),
-            mock.call(
-                ["growpart", diskdev, partnum],
-                env={'LANG': 'C', 'TMPDIR': '/tmp'}),
-        ])
-
-    @mock.patch.dict("os.environ", {'LANG': 'cs_CZ.UTF-8'}, clear=True)
+        mockobj.assert_has_calls(
+            [
+                mock.call(
+                    ["growpart", "--dry-run", diskdev, partnum],
+                    env={"LANG": "C", "TMPDIR": "/tmp"},
+                ),
+                mock.call(
+                    ["growpart", diskdev, partnum],
+                    env={"LANG": "C", "TMPDIR": "/tmp"},
+                ),
+            ]
+        )
+
+    @mock.patch.dict("os.environ", {"LANG": "cs_CZ.UTF-8"}, clear=True)
     def test_mode_auto_falls_back_to_gpart(self):
         with mock.patch.object(
-                subp, 'subp',
-                return_value=("", HELP_GPART)) as mockobj:
+            subp, "subp", return_value=("", HELP_GPART)
+        ) as mockobj:
             ret = cc_growpart.resizer_factory(mode="auto")
             self.assertIsInstance(ret, cc_growpart.ResizeGpart)
 
-            mockobj.assert_has_calls([
-                mock.call(['growpart', '--help'], env={'LANG': 'C'}),
-                mock.call(['gpart', 'help'], env={'LANG': 'C'}, rcs=[0, 1])])
+            mockobj.assert_has_calls(
+                [
+                    mock.call(["growpart", "--help"], env={"LANG": "C"}),
+                    mock.call(
+                        ["gpart", "help"], env={"LANG": "C"}, rcs=[0, 1]
+                    ),
+                ]
+            )
 
     def test_handle_with_no_growpart_entry(self):
         # if no 'growpart' entry in config, then mode=auto should be used
 
         myresizer = object()
-        retval = (("/", cc_growpart.RESIZE.CHANGED, "my-message",),)
+        retval = (
+            (
+                "/",
+                cc_growpart.RESIZE.CHANGED,
+                "my-message",
+            ),
+        )
 
         with ExitStack() as mocks:
             factory = mocks.enter_context(
-                mock.patch.object(cc_growpart, 'resizer_factory',
-                                  return_value=myresizer))
+                mock.patch.object(
+                    cc_growpart, "resizer_factory", return_value=myresizer
+                )
+            )
             rsdevs = mocks.enter_context(
-                mock.patch.object(cc_growpart, 'resize_devices',
-                                  return_value=retval))
+                mock.patch.object(
+                    cc_growpart, "resize_devices", return_value=retval
+                )
+            )
             mocks.enter_context(
-                mock.patch.object(cc_growpart, 'RESIZERS',
-                                  (('mysizer', object),)
-                                  ))
+                mock.patch.object(
+                    cc_growpart, "RESIZERS", (("mysizer", object),)
+                )
+            )
 
             self.handle(self.name, {}, self.cloud_init, self.log, self.args)
 
-            factory.assert_called_once_with('auto')
-            rsdevs.assert_called_once_with(myresizer, ['/'])
+            factory.assert_called_once_with("auto")
+            rsdevs.assert_called_once_with(myresizer, ["/"])
 
 
 class TestResize(unittest.TestCase):
@@ -244,9 +280,18 @@ class TestResize(unittest.TestCase):
         # this patches out devent2dev, os.stat, and device_part_info
         # so in the end, doesn't test a lot
         devs = ["/dev/XXda1", "/dev/YYda2"]
-        devstat_ret = Bunch(st_mode=25008, st_ino=6078, st_dev=5,
-                            st_nlink=1, st_uid=0, st_gid=6, st_size=0,
-                            st_atime=0, st_mtime=0, st_ctime=0)
+        devstat_ret = Bunch(
+            st_mode=25008,
+            st_ino=6078,
+            st_dev=5,
+            st_nlink=1,
+            st_uid=0,
+            st_gid=6,
+            st_size=0,
+            st_atime=0,
+            st_mtime=0,
+            st_ctime=0,
+        )
         enoent = ["/dev/NOENT"]
         real_stat = os.stat
         resize_calls = []
@@ -280,12 +325,15 @@ class TestResize(unittest.TestCase):
                         return f
                 return None
 
-            self.assertEqual(cc_growpart.RESIZE.NOCHANGE,
-                             find("/dev/XXda1", resized)[1])
-            self.assertEqual(cc_growpart.RESIZE.CHANGED,
-                             find("/dev/YYda2", resized)[1])
-            self.assertEqual(cc_growpart.RESIZE.SKIPPED,
-                             find(enoent[0], resized)[1])
+            self.assertEqual(
+                cc_growpart.RESIZE.NOCHANGE, find("/dev/XXda1", resized)[1]
+            )
+            self.assertEqual(
+                cc_growpart.RESIZE.CHANGED, find("/dev/YYda2", resized)[1]
+            )
+            self.assertEqual(
+                cc_growpart.RESIZE.SKIPPED, find(enoent[0], resized)[1]
+            )
             # self.assertEqual(resize_calls,
             #                 [("/dev/XXda", "1", "/dev/XXda1"),
             #                  ("/dev/YYda", "2", "/dev/YYda2")])
diff --git a/tests/unittests/config/test_cc_grub_dpkg.py b/tests/unittests/config/test_cc_grub_dpkg.py
index 99c05bb5..5151a7b5 100644
--- a/tests/unittests/config/test_cc_grub_dpkg.py
+++ b/tests/unittests/config/test_cc_grub_dpkg.py
@@ -1,11 +1,12 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
+from logging import Logger
+from unittest import mock
+
 import pytest
 
-from unittest import mock
-from logging import Logger
-from cloudinit.subp import ProcessExecutionError
 from cloudinit.config.cc_grub_dpkg import fetch_idevs, handle
+from cloudinit.subp import ProcessExecutionError
 
 
 class TestFetchIdevs:
@@ -21,73 +22,78 @@ class TestFetchIdevs:
                 ProcessExecutionError(reason=FileNotFoundError()),
                 False,
                 mock.call("'grub-probe' not found in $PATH"),
-                '',
-                '',
+                "",
+                "",
             ),
             # Inside a container, grub installed
             (
                 ProcessExecutionError(stderr="failed to get canonical path"),
                 False,
                 mock.call("grub-probe 'failed to get canonical path'"),
-                '',
-                '',
+                "",
+                "",
             ),
             # KVM Instance
             (
-                ['/dev/vda'],
+                ["/dev/vda"],
                 True,
                 None,
                 (
-                    '/dev/disk/by-path/pci-0000:00:00.0 ',
-                    '/dev/disk/by-path/virtio-pci-0000:00:00.0 '
+                    "/dev/disk/by-path/pci-0000:00:00.0 ",
+                    "/dev/disk/by-path/virtio-pci-0000:00:00.0 ",
                 ),
-                '/dev/vda',
+                "/dev/vda",
             ),
             # Xen Instance
             (
-                ['/dev/xvda'],
+                ["/dev/xvda"],
                 True,
                 None,
-                '',
-                '/dev/xvda',
+                "",
+                "/dev/xvda",
             ),
             # NVMe Hardware Instance
             (
-                ['/dev/nvme1n1'],
+                ["/dev/nvme1n1"],
                 True,
                 None,
                 (
-                    '/dev/disk/by-id/nvme-Company_hash000 ',
-                    '/dev/disk/by-id/nvme-nvme.000-000-000-000-000 ',
-                    '/dev/disk/by-path/pci-0000:00:00.0-nvme-0 '
+                    "/dev/disk/by-id/nvme-Company_hash000 ",
+                    "/dev/disk/by-id/nvme-nvme.000-000-000-000-000 ",
+                    "/dev/disk/by-path/pci-0000:00:00.0-nvme-0 ",
                 ),
-                '/dev/disk/by-id/nvme-Company_hash000',
+                "/dev/disk/by-id/nvme-Company_hash000",
             ),
             # SCSI Hardware Instance
             (
-                ['/dev/sda'],
+                ["/dev/sda"],
                 True,
                 None,
                 (
-                    '/dev/disk/by-id/company-user-1 ',
-                    '/dev/disk/by-id/scsi-0Company_user-1 ',
-                    '/dev/disk/by-path/pci-0000:00:00.0-scsi-0:0:0:0 '
+                    "/dev/disk/by-id/company-user-1 ",
+                    "/dev/disk/by-id/scsi-0Company_user-1 ",
+                    "/dev/disk/by-path/pci-0000:00:00.0-scsi-0:0:0:0 ",
                 ),
-                '/dev/disk/by-id/company-user-1',
+                "/dev/disk/by-id/company-user-1",
             ),
         ],
     )
     @mock.patch("cloudinit.config.cc_grub_dpkg.util.logexc")
     @mock.patch("cloudinit.config.cc_grub_dpkg.os.path.exists")
     @mock.patch("cloudinit.config.cc_grub_dpkg.subp.subp")
-    def test_fetch_idevs(self, m_subp, m_exists, m_logexc, grub_output,
-                         path_exists, expected_log_call, udevadm_output,
-                         expected_idevs):
+    def test_fetch_idevs(
+        self,
+        m_subp,
+        m_exists,
+        m_logexc,
+        grub_output,
+        path_exists,
+        expected_log_call,
+        udevadm_output,
+        expected_idevs,
+    ):
         """Tests outputs from grub-probe and udevadm info against grub-dpkg"""
-        m_subp.side_effect = [
-            grub_output,
-            ["".join(udevadm_output)]
-        ]
+        m_subp.side_effect = [grub_output, ["".join(udevadm_output)]]
         m_exists.return_value = path_exists
         log = mock.Mock(spec=Logger)
         idevs = fetch_idevs(log)
@@ -106,67 +112,72 @@ class TestHandle:
                 # No configuration
                 None,
                 None,
-                '/dev/disk/by-id/nvme-Company_hash000',
+                "/dev/disk/by-id/nvme-Company_hash000",
                 (
                     "Setting grub debconf-set-selections with ",
-                    "'/dev/disk/by-id/nvme-Company_hash000','false'"
+                    "'/dev/disk/by-id/nvme-Company_hash000','false'",
                 ),
             ),
             (
                 # idevs set, idevs_empty unset
-                '/dev/sda',
+                "/dev/sda",
                 None,
-                '/dev/sda',
+                "/dev/sda",
                 (
                     "Setting grub debconf-set-selections with ",
-                    "'/dev/sda','false'"
+                    "'/dev/sda','false'",
                 ),
             ),
             (
                 # idevs unset, idevs_empty set
                 None,
-                'true',
-                '/dev/xvda',
+                "true",
+                "/dev/xvda",
                 (
                     "Setting grub debconf-set-selections with ",
-                    "'/dev/xvda','true'"
+                    "'/dev/xvda','true'",
                 ),
             ),
             (
                 # idevs set, idevs_empty set
-                '/dev/vda',
-                'false',
-                '/dev/disk/by-id/company-user-1',
+                "/dev/vda",
+                "false",
+                "/dev/disk/by-id/company-user-1",
                 (
                     "Setting grub debconf-set-selections with ",
-                    "'/dev/vda','false'"
+                    "'/dev/vda','false'",
                 ),
             ),
             (
                 # idevs set, idevs_empty set
                 # Respect what the user defines, even if its logically wrong
-                '/dev/nvme0n1',
-                'true',
-                '',
+                "/dev/nvme0n1",
+                "true",
+                "",
                 (
                     "Setting grub debconf-set-selections with ",
-                    "'/dev/nvme0n1','true'"
+                    "'/dev/nvme0n1','true'",
                 ),
-            )
+            ),
         ],
     )
     @mock.patch("cloudinit.config.cc_grub_dpkg.fetch_idevs")
     @mock.patch("cloudinit.config.cc_grub_dpkg.util.get_cfg_option_str")
     @mock.patch("cloudinit.config.cc_grub_dpkg.util.logexc")
     @mock.patch("cloudinit.config.cc_grub_dpkg.subp.subp")
-    def test_handle(self, m_subp, m_logexc, m_get_cfg_str, m_fetch_idevs,
-                    cfg_idevs, cfg_idevs_empty, fetch_idevs_output,
-                    expected_log_output):
+    def test_handle(
+        self,
+        m_subp,
+        m_logexc,
+        m_get_cfg_str,
+        m_fetch_idevs,
+        cfg_idevs,
+        cfg_idevs_empty,
+        fetch_idevs_output,
+        expected_log_output,
+    ):
         """Test setting of correct debconf database entries"""
-        m_get_cfg_str.side_effect = [
-            cfg_idevs,
-            cfg_idevs_empty
-        ]
+        m_get_cfg_str.side_effect = [cfg_idevs, cfg_idevs_empty]
         m_fetch_idevs.return_value = fetch_idevs_output
         log = mock.Mock(spec=Logger)
         handle(mock.Mock(), mock.Mock(), mock.Mock(), log, mock.Mock())
diff --git a/tests/unittests/config/test_cc_install_hotplug.py b/tests/unittests/config/test_cc_install_hotplug.py
index 5d6b1e77..3bd44aba 100644
--- a/tests/unittests/config/test_cc_install_hotplug.py
+++ b/tests/unittests/config/test_cc_install_hotplug.py
@@ -5,28 +5,31 @@ from unittest import mock
 import pytest
 
 from cloudinit.config.cc_install_hotplug import (
-    handle,
     HOTPLUG_UDEV_PATH,
     HOTPLUG_UDEV_RULES_TEMPLATE,
+    handle,
 )
 from cloudinit.event import EventScope, EventType
 
 
 @pytest.yield_fixture()
 def mocks():
-    m_update_enabled = mock.patch('cloudinit.stages.update_event_enabled')
-    m_write = mock.patch('cloudinit.util.write_file', autospec=True)
-    m_del = mock.patch('cloudinit.util.del_file', autospec=True)
-    m_subp = mock.patch('cloudinit.subp.subp')
-    m_which = mock.patch('cloudinit.subp.which', return_value=None)
-    m_path_exists = mock.patch('os.path.exists', return_value=False)
+    m_update_enabled = mock.patch("cloudinit.stages.update_event_enabled")
+    m_write = mock.patch("cloudinit.util.write_file", autospec=True)
+    m_del = mock.patch("cloudinit.util.del_file", autospec=True)
+    m_subp = mock.patch("cloudinit.subp.subp")
+    m_which = mock.patch("cloudinit.subp.which", return_value=None)
+    m_path_exists = mock.patch("os.path.exists", return_value=False)
 
     yield namedtuple(
-        'Mocks',
-        'm_update_enabled m_write m_del m_subp m_which m_path_exists'
+        "Mocks", "m_update_enabled m_write m_del m_subp m_which m_path_exists"
     )(
-        m_update_enabled.start(), m_write.start(), m_del.start(),
-        m_subp.start(), m_which.start(), m_path_exists.start()
+        m_update_enabled.start(),
+        m_write.start(),
+        m_del.start(),
+        m_subp.start(),
+        m_which.start(),
+        m_path_exists.start(),
     )
 
     m_update_enabled.stop()
@@ -38,11 +41,11 @@ def mocks():
 
 
 class TestInstallHotplug:
-    @pytest.mark.parametrize('libexec_exists', [True, False])
+    @pytest.mark.parametrize("libexec_exists", [True, False])
     def test_rules_installed_when_supported_and_enabled(
         self, mocks, libexec_exists
     ):
-        mocks.m_which.return_value = 'udevadm'
+        mocks.m_which.return_value = "udevadm"
         mocks.m_update_enabled.return_value = True
         m_cloud = mock.MagicMock()
         m_cloud.datasource.get_supported_events.return_value = {
@@ -53,16 +56,23 @@ class TestInstallHotplug:
             libexecdir = "/usr/libexec/cloud-init"
         else:
             libexecdir = "/usr/lib/cloud-init"
-        with mock.patch('os.path.exists', return_value=libexec_exists):
+        with mock.patch("os.path.exists", return_value=libexec_exists):
             handle(None, {}, m_cloud, mock.Mock(), None)
             mocks.m_write.assert_called_once_with(
                 filename=HOTPLUG_UDEV_PATH,
                 content=HOTPLUG_UDEV_RULES_TEMPLATE.format(
-                    libexecdir=libexecdir),
+                    libexecdir=libexecdir
+                ),
             )
-        assert mocks.m_subp.call_args_list == [mock.call([
-            'udevadm', 'control', '--reload-rules',
-        ])]
+        assert mocks.m_subp.call_args_list == [
+            mock.call(
+                [
+                    "udevadm",
+                    "control",
+                    "--reload-rules",
+                ]
+            )
+        ]
         assert mocks.m_del.call_args_list == []
 
     def test_rules_not_installed_when_unsupported(self, mocks):
@@ -95,9 +105,15 @@ class TestInstallHotplug:
 
         handle(None, {}, m_cloud, mock.Mock(), None)
         mocks.m_del.assert_called_with(HOTPLUG_UDEV_PATH)
-        assert mocks.m_subp.call_args_list == [mock.call([
-            'udevadm', 'control', '--reload-rules',
-        ])]
+        assert mocks.m_subp.call_args_list == [
+            mock.call(
+                [
+                    "udevadm",
+                    "control",
+                    "--reload-rules",
+                ]
+            )
+        ]
         assert mocks.m_write.call_args_list == []
 
     def test_rules_not_installed_when_no_udevadm(self, mocks):
diff --git a/tests/unittests/config/test_cc_keys_to_console.py b/tests/unittests/config/test_cc_keys_to_console.py
index 4083fc54..9efc2b48 100644
--- a/tests/unittests/config/test_cc_keys_to_console.py
+++ b/tests/unittests/config/test_cc_keys_to_console.py
@@ -16,12 +16,18 @@ class TestHandle:
     @mock.patch("cloudinit.config.cc_keys_to_console.util.multi_log")
     @mock.patch("cloudinit.config.cc_keys_to_console.os.path.exists")
     @mock.patch("cloudinit.config.cc_keys_to_console.subp.subp")
-    @pytest.mark.parametrize("cfg,subp_called", [
-        ({}, True),  # Default to emitting keys
-        ({"ssh": {}}, True),  # Default even if we have the parent key
-        ({"ssh": {"emit_keys_to_console": True}}, True),  # Explicitly enabled
-        ({"ssh": {"emit_keys_to_console": False}}, False),  # Disabled
-    ])
+    @pytest.mark.parametrize(
+        "cfg,subp_called",
+        [
+            ({}, True),  # Default to emitting keys
+            ({"ssh": {}}, True),  # Default even if we have the parent key
+            (
+                {"ssh": {"emit_keys_to_console": True}},
+                True,
+            ),  # Explicitly enabled
+            ({"ssh": {"emit_keys_to_console": False}}, False),  # Disabled
+        ],
+    )
     def test_emit_keys_to_console_config(
         self, m_subp, m_path_exists, _m_multi_log, cfg, subp_called
     ):
diff --git a/tests/unittests/config/test_cc_landscape.py b/tests/unittests/config/test_cc_landscape.py
index 07b3f899..efddc1b6 100644
--- a/tests/unittests/config/test_cc_landscape.py
+++ b/tests/unittests/config/test_cc_landscape.py
@@ -1,12 +1,15 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 import logging
+
 from configobj import ConfigObj
 
-from cloudinit.config import cc_landscape
 from cloudinit import util
-from tests.unittests.helpers import (FilesystemMockingTestCase, mock,
-                                     wrap_and_call)
-
+from cloudinit.config import cc_landscape
+from tests.unittests.helpers import (
+    FilesystemMockingTestCase,
+    mock,
+    wrap_and_call,
+)
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -19,108 +22,149 @@ class TestLandscape(FilesystemMockingTestCase):
     def setUp(self):
         super(TestLandscape, self).setUp()
         self.new_root = self.tmp_dir()
-        self.conf = self.tmp_path('client.conf', self.new_root)
-        self.default_file = self.tmp_path('default_landscape', self.new_root)
+        self.conf = self.tmp_path("client.conf", self.new_root)
+        self.default_file = self.tmp_path("default_landscape", self.new_root)
         self.patchUtils(self.new_root)
         self.add_patch(
-            'cloudinit.distros.ubuntu.Distro.install_packages',
-            'm_install_packages'
+            "cloudinit.distros.ubuntu.Distro.install_packages",
+            "m_install_packages",
         )
 
     def test_handler_skips_empty_landscape_cloudconfig(self):
         """Empty landscape cloud-config section does no work."""
-        mycloud = get_cloud('ubuntu')
+        mycloud = get_cloud("ubuntu")
         mycloud.distro = mock.MagicMock()
-        cfg = {'landscape': {}}
-        cc_landscape.handle('notimportant', cfg, mycloud, LOG, None)
+        cfg = {"landscape": {}}
+        cc_landscape.handle("notimportant", cfg, mycloud, LOG, None)
         self.assertFalse(mycloud.distro.install_packages.called)
 
     def test_handler_error_on_invalid_landscape_type(self):
         """Raise an error when landscape configuraiton option is invalid."""
-        mycloud = get_cloud('ubuntu')
-        cfg = {'landscape': 'wrongtype'}
+        mycloud = get_cloud("ubuntu")
+        cfg = {"landscape": "wrongtype"}
         with self.assertRaises(RuntimeError) as context_manager:
-            cc_landscape.handle('notimportant', cfg, mycloud, LOG, None)
+            cc_landscape.handle("notimportant", cfg, mycloud, LOG, None)
         self.assertIn(
             "'landscape' key existed in config, but not a dict",
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
-    @mock.patch('cloudinit.config.cc_landscape.subp')
+    @mock.patch("cloudinit.config.cc_landscape.subp")
     def test_handler_restarts_landscape_client(self, m_subp):
         """handler restarts lansdscape-client after install."""
-        mycloud = get_cloud('ubuntu')
-        cfg = {'landscape': {'client': {}}}
+        mycloud = get_cloud("ubuntu")
+        cfg = {"landscape": {"client": {}}}
         wrap_and_call(
-            'cloudinit.config.cc_landscape',
-            {'LSC_CLIENT_CFG_FILE': {'new': self.conf}},
-            cc_landscape.handle, 'notimportant', cfg, mycloud, LOG, None)
+            "cloudinit.config.cc_landscape",
+            {"LSC_CLIENT_CFG_FILE": {"new": self.conf}},
+            cc_landscape.handle,
+            "notimportant",
+            cfg,
+            mycloud,
+            LOG,
+            None,
+        )
         self.assertEqual(
-            [mock.call(['service', 'landscape-client', 'restart'])],
-            m_subp.subp.call_args_list)
+            [mock.call(["service", "landscape-client", "restart"])],
+            m_subp.subp.call_args_list,
+        )
 
     def test_handler_installs_client_and_creates_config_file(self):
         """Write landscape client.conf and install landscape-client."""
-        mycloud = get_cloud('ubuntu')
-        cfg = {'landscape': {'client': {}}}
-        expected = {'client': {
-            'log_level': 'info',
-            'url': 'https://landscape.canonical.com/message-system',
-            'ping_url': 'http://landscape.canonical.com/ping',
-            'data_path': '/var/lib/landscape/client'}}
+        mycloud = get_cloud("ubuntu")
+        cfg = {"landscape": {"client": {}}}
+        expected = {
+            "client": {
+                "log_level": "info",
+                "url": "https://landscape.canonical.com/message-system",
+                "ping_url": "http://landscape.canonical.com/ping",
+                "data_path": "/var/lib/landscape/client",
+            }
+        }
         mycloud.distro = mock.MagicMock()
         wrap_and_call(
-            'cloudinit.config.cc_landscape',
-            {'LSC_CLIENT_CFG_FILE': {'new': self.conf},
-             'LS_DEFAULT_FILE': {'new': self.default_file}},
-            cc_landscape.handle, 'notimportant', cfg, mycloud, LOG, None)
+            "cloudinit.config.cc_landscape",
+            {
+                "LSC_CLIENT_CFG_FILE": {"new": self.conf},
+                "LS_DEFAULT_FILE": {"new": self.default_file},
+            },
+            cc_landscape.handle,
+            "notimportant",
+            cfg,
+            mycloud,
+            LOG,
+            None,
+        )
         self.assertEqual(
-            [mock.call('landscape-client')],
-            mycloud.distro.install_packages.call_args)
+            [mock.call("landscape-client")],
+            mycloud.distro.install_packages.call_args,
+        )
         self.assertEqual(expected, dict(ConfigObj(self.conf)))
         self.assertIn(
-            'Wrote landscape config file to {0}'.format(self.conf),
-            self.logs.getvalue())
+            "Wrote landscape config file to {0}".format(self.conf),
+            self.logs.getvalue(),
+        )
         default_content = util.load_file(self.default_file)
-        self.assertEqual('RUN=1\n', default_content)
+        self.assertEqual("RUN=1\n", default_content)
 
     def test_handler_writes_merged_client_config_file_with_defaults(self):
         """Merge and write options from LSC_CLIENT_CFG_FILE with defaults."""
         # Write existing sparse client.conf file
-        util.write_file(self.conf, '[client]\ncomputer_title = My PC\n')
-        mycloud = get_cloud('ubuntu')
-        cfg = {'landscape': {'client': {}}}
-        expected = {'client': {
-            'log_level': 'info',
-            'url': 'https://landscape.canonical.com/message-system',
-            'ping_url': 'http://landscape.canonical.com/ping',
-            'data_path': '/var/lib/landscape/client',
-            'computer_title': 'My PC'}}
+        util.write_file(self.conf, "[client]\ncomputer_title = My PC\n")
+        mycloud = get_cloud("ubuntu")
+        cfg = {"landscape": {"client": {}}}
+        expected = {
+            "client": {
+                "log_level": "info",
+                "url": "https://landscape.canonical.com/message-system",
+                "ping_url": "http://landscape.canonical.com/ping",
+                "data_path": "/var/lib/landscape/client",
+                "computer_title": "My PC",
+            }
+        }
         wrap_and_call(
-            'cloudinit.config.cc_landscape',
-            {'LSC_CLIENT_CFG_FILE': {'new': self.conf}},
-            cc_landscape.handle, 'notimportant', cfg, mycloud, LOG, None)
+            "cloudinit.config.cc_landscape",
+            {"LSC_CLIENT_CFG_FILE": {"new": self.conf}},
+            cc_landscape.handle,
+            "notimportant",
+            cfg,
+            mycloud,
+            LOG,
+            None,
+        )
         self.assertEqual(expected, dict(ConfigObj(self.conf)))
         self.assertIn(
-            'Wrote landscape config file to {0}'.format(self.conf),
-            self.logs.getvalue())
+            "Wrote landscape config file to {0}".format(self.conf),
+            self.logs.getvalue(),
+        )
 
     def test_handler_writes_merged_provided_cloudconfig_with_defaults(self):
         """Merge and write options from cloud-config options with defaults."""
         # Write empty sparse client.conf file
-        util.write_file(self.conf, '')
-        mycloud = get_cloud('ubuntu')
-        cfg = {'landscape': {'client': {'computer_title': 'My PC'}}}
-        expected = {'client': {
-            'log_level': 'info',
-            'url': 'https://landscape.canonical.com/message-system',
-            'ping_url': 'http://landscape.canonical.com/ping',
-            'data_path': '/var/lib/landscape/client',
-            'computer_title': 'My PC'}}
+        util.write_file(self.conf, "")
+        mycloud = get_cloud("ubuntu")
+        cfg = {"landscape": {"client": {"computer_title": "My PC"}}}
+        expected = {
+            "client": {
+                "log_level": "info",
+                "url": "https://landscape.canonical.com/message-system",
+                "ping_url": "http://landscape.canonical.com/ping",
+                "data_path": "/var/lib/landscape/client",
+                "computer_title": "My PC",
+            }
+        }
         wrap_and_call(
-            'cloudinit.config.cc_landscape',
-            {'LSC_CLIENT_CFG_FILE': {'new': self.conf}},
-            cc_landscape.handle, 'notimportant', cfg, mycloud, LOG, None)
+            "cloudinit.config.cc_landscape",
+            {"LSC_CLIENT_CFG_FILE": {"new": self.conf}},
+            cc_landscape.handle,
+            "notimportant",
+            cfg,
+            mycloud,
+            LOG,
+            None,
+        )
         self.assertEqual(expected, dict(ConfigObj(self.conf)))
         self.assertIn(
-            'Wrote landscape config file to {0}'.format(self.conf),
-            self.logs.getvalue())
+            "Wrote landscape config file to {0}".format(self.conf),
+            self.logs.getvalue(),
+        )
diff --git a/tests/unittests/config/test_cc_locale.py b/tests/unittests/config/test_cc_locale.py
index 6cd95a29..7190bc68 100644
--- a/tests/unittests/config/test_cc_locale.py
+++ b/tests/unittests/config/test_cc_locale.py
@@ -8,21 +8,19 @@ import os
 import shutil
 import tempfile
 from io import BytesIO
-from configobj import ConfigObj
 from unittest import mock
 
+from configobj import ConfigObj
+
 from cloudinit import util
 from cloudinit.config import cc_locale
 from tests.unittests import helpers as t_help
-
 from tests.unittests.util import get_cloud
 
-
 LOG = logging.getLogger(__name__)
 
 
 class TestLocale(t_help.FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestLocale, self).setUp()
         self.new_root = tempfile.mkdtemp()
@@ -30,35 +28,37 @@ class TestLocale(t_help.FilesystemMockingTestCase):
         self.patchUtils(self.new_root)
 
     def test_set_locale_arch(self):
-        locale = 'en_GB.UTF-8'
-        locale_configfile = '/etc/invalid-locale-path'
+        locale = "en_GB.UTF-8"
+        locale_configfile = "/etc/invalid-locale-path"
         cfg = {
-            'locale': locale,
-            'locale_configfile': locale_configfile,
+            "locale": locale,
+            "locale_configfile": locale_configfile,
         }
-        cc = get_cloud('arch')
-
-        with mock.patch('cloudinit.distros.arch.subp.subp') as m_subp:
-            with mock.patch('cloudinit.distros.arch.LOG.warning') as m_LOG:
-                cc_locale.handle('cc_locale', cfg, cc, LOG, [])
-                m_LOG.assert_called_with('Invalid locale_configfile %s, '
-                                         'only supported value is '
-                                         '/etc/locale.conf',
-                                         locale_configfile)
+        cc = get_cloud("arch")
+
+        with mock.patch("cloudinit.distros.arch.subp.subp") as m_subp:
+            with mock.patch("cloudinit.distros.arch.LOG.warning") as m_LOG:
+                cc_locale.handle("cc_locale", cfg, cc, LOG, [])
+                m_LOG.assert_called_with(
+                    "Invalid locale_configfile %s, "
+                    "only supported value is "
+                    "/etc/locale.conf",
+                    locale_configfile,
+                )
 
                 contents = util.load_file(cc.distro.locale_gen_fn)
-                self.assertIn('%s UTF-8' % locale, contents)
-                m_subp.assert_called_with(['localectl',
-                                           'set-locale',
-                                           locale], capture=False)
+                self.assertIn("%s UTF-8" % locale, contents)
+                m_subp.assert_called_with(
+                    ["localectl", "set-locale", locale], capture=False
+                )
 
     def test_set_locale_sles(self):
 
         cfg = {
-            'locale': 'My.Locale',
+            "locale": "My.Locale",
         }
-        cc = get_cloud('sles')
-        cc_locale.handle('cc_locale', cfg, cc, LOG, [])
+        cc = get_cloud("sles")
+        cc_locale.handle("cc_locale", cfg, cc, LOG, [])
         if cc.distro.uses_systemd():
             locale_conf = cc.distro.systemd_locale_conf_fn
         else:
@@ -66,51 +66,58 @@ class TestLocale(t_help.FilesystemMockingTestCase):
         contents = util.load_file(locale_conf, decode=False)
         n_cfg = ConfigObj(BytesIO(contents))
         if cc.distro.uses_systemd():
-            self.assertEqual({'LANG': cfg['locale']}, dict(n_cfg))
+            self.assertEqual({"LANG": cfg["locale"]}, dict(n_cfg))
         else:
-            self.assertEqual({'RC_LANG': cfg['locale']}, dict(n_cfg))
+            self.assertEqual({"RC_LANG": cfg["locale"]}, dict(n_cfg))
 
     def test_set_locale_sles_default(self):
         cfg = {}
-        cc = get_cloud('sles')
-        cc_locale.handle('cc_locale', cfg, cc, LOG, [])
+        cc = get_cloud("sles")
+        cc_locale.handle("cc_locale", cfg, cc, LOG, [])
 
         if cc.distro.uses_systemd():
             locale_conf = cc.distro.systemd_locale_conf_fn
-            keyname = 'LANG'
+            keyname = "LANG"
         else:
             locale_conf = cc.distro.locale_conf_fn
-            keyname = 'RC_LANG'
+            keyname = "RC_LANG"
 
         contents = util.load_file(locale_conf, decode=False)
         n_cfg = ConfigObj(BytesIO(contents))
-        self.assertEqual({keyname: 'en_US.UTF-8'}, dict(n_cfg))
+        self.assertEqual({keyname: "en_US.UTF-8"}, dict(n_cfg))
 
     def test_locale_update_config_if_different_than_default(self):
         """Test cc_locale writes updates conf if different than default"""
         locale_conf = os.path.join(self.new_root, "etc/default/locale")
         util.write_file(locale_conf, 'LANG="en_US.UTF-8"\n')
-        cfg = {'locale': 'C.UTF-8'}
-        cc = get_cloud('ubuntu')
-        with mock.patch('cloudinit.distros.debian.subp.subp') as m_subp:
-            with mock.patch('cloudinit.distros.debian.LOCALE_CONF_FN',
-                            locale_conf):
-                cc_locale.handle('cc_locale', cfg, cc, LOG, [])
-                m_subp.assert_called_with(['update-locale',
-                                           '--locale-file=%s' % locale_conf,
-                                           'LANG=C.UTF-8'], capture=False)
+        cfg = {"locale": "C.UTF-8"}
+        cc = get_cloud("ubuntu")
+        with mock.patch("cloudinit.distros.debian.subp.subp") as m_subp:
+            with mock.patch(
+                "cloudinit.distros.debian.LOCALE_CONF_FN", locale_conf
+            ):
+                cc_locale.handle("cc_locale", cfg, cc, LOG, [])
+                m_subp.assert_called_with(
+                    [
+                        "update-locale",
+                        "--locale-file=%s" % locale_conf,
+                        "LANG=C.UTF-8",
+                    ],
+                    capture=False,
+                )
 
     def test_locale_rhel_defaults_en_us_utf8(self):
         """Test cc_locale gets en_US.UTF-8 from distro get_locale fallback"""
         cfg = {}
-        cc = get_cloud('rhel')
-        update_sysconfig = 'cloudinit.distros.rhel_util.update_sysconfig_file'
-        with mock.patch.object(cc.distro, 'uses_systemd') as m_use_sd:
+        cc = get_cloud("rhel")
+        update_sysconfig = "cloudinit.distros.rhel_util.update_sysconfig_file"
+        with mock.patch.object(cc.distro, "uses_systemd") as m_use_sd:
             m_use_sd.return_value = True
             with mock.patch(update_sysconfig) as m_update_syscfg:
-                cc_locale.handle('cc_locale', cfg, cc, LOG, [])
-                m_update_syscfg.assert_called_with('/etc/locale.conf',
-                                                   {'LANG': 'en_US.UTF-8'})
+                cc_locale.handle("cc_locale", cfg, cc, LOG, [])
+                m_update_syscfg.assert_called_with(
+                    "/etc/locale.conf", {"LANG": "en_US.UTF-8"}
+                )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_lxd.py b/tests/unittests/config/test_cc_lxd.py
index 887987c0..720274d6 100644
--- a/tests/unittests/config/test_cc_lxd.py
+++ b/tests/unittests/config/test_cc_lxd.py
@@ -3,7 +3,6 @@ from unittest import mock
 
 from cloudinit.config import cc_lxd
 from tests.unittests import helpers as t_help
-
 from tests.unittests.util import get_cloud
 
 
@@ -12,11 +11,11 @@ class TestLxd(t_help.CiTestCase):
     with_logs = True
 
     lxd_cfg = {
-        'lxd': {
-            'init': {
-                'network_address': '0.0.0.0',
-                'storage_backend': 'zfs',
-                'storage_pool': 'poolname',
+        "lxd": {
+            "init": {
+                "network_address": "0.0.0.0",
+                "storage_backend": "zfs",
+                "storage_pool": "poolname",
             }
         }
     }
@@ -27,16 +26,26 @@ class TestLxd(t_help.CiTestCase):
         cc = get_cloud()
         mock_subp.which.return_value = True
         m_maybe_clean.return_value = None
-        cc_lxd.handle('cc_lxd', self.lxd_cfg, cc, self.logger, [])
+        cc_lxd.handle("cc_lxd", self.lxd_cfg, cc, self.logger, [])
         self.assertTrue(mock_subp.which.called)
         # no bridge config, so maybe_cleanup should not be called.
         self.assertFalse(m_maybe_clean.called)
         self.assertEqual(
-            [mock.call(['lxd', 'waitready', '--timeout=300']),
-             mock.call(
-                 ['lxd', 'init', '--auto', '--network-address=0.0.0.0',
-                  '--storage-backend=zfs', '--storage-pool=poolname'])],
-            mock_subp.subp.call_args_list)
+            [
+                mock.call(["lxd", "waitready", "--timeout=300"]),
+                mock.call(
+                    [
+                        "lxd",
+                        "init",
+                        "--auto",
+                        "--network-address=0.0.0.0",
+                        "--storage-backend=zfs",
+                        "--storage-pool=poolname",
+                    ]
+                ),
+            ],
+            mock_subp.subp.call_args_list,
+        )
 
     @mock.patch("cloudinit.config.cc_lxd.maybe_cleanup_default")
     @mock.patch("cloudinit.config.cc_lxd.subp")
@@ -44,20 +53,20 @@ class TestLxd(t_help.CiTestCase):
         cc = get_cloud()
         cc.distro = mock.MagicMock()
         mock_subp.which.return_value = None
-        cc_lxd.handle('cc_lxd', self.lxd_cfg, cc, self.logger, [])
-        self.assertNotIn('WARN', self.logs.getvalue())
+        cc_lxd.handle("cc_lxd", self.lxd_cfg, cc, self.logger, [])
+        self.assertNotIn("WARN", self.logs.getvalue())
         self.assertTrue(cc.distro.install_packages.called)
-        cc_lxd.handle('cc_lxd', self.lxd_cfg, cc, self.logger, [])
+        cc_lxd.handle("cc_lxd", self.lxd_cfg, cc, self.logger, [])
         self.assertFalse(m_maybe_clean.called)
         install_pkg = cc.distro.install_packages.call_args_list[0][0][0]
-        self.assertEqual(sorted(install_pkg), ['lxd', 'zfsutils-linux'])
+        self.assertEqual(sorted(install_pkg), ["lxd", "zfsutils-linux"])
 
     @mock.patch("cloudinit.config.cc_lxd.maybe_cleanup_default")
     @mock.patch("cloudinit.config.cc_lxd.subp")
     def test_no_init_does_nothing(self, mock_subp, m_maybe_clean):
         cc = get_cloud()
         cc.distro = mock.MagicMock()
-        cc_lxd.handle('cc_lxd', {'lxd': {}}, cc, self.logger, [])
+        cc_lxd.handle("cc_lxd", {"lxd": {}}, cc, self.logger, [])
         self.assertFalse(cc.distro.install_packages.called)
         self.assertFalse(mock_subp.subp.called)
         self.assertFalse(m_maybe_clean.called)
@@ -67,118 +76,150 @@ class TestLxd(t_help.CiTestCase):
     def test_no_lxd_does_nothing(self, mock_subp, m_maybe_clean):
         cc = get_cloud()
         cc.distro = mock.MagicMock()
-        cc_lxd.handle('cc_lxd', {'package_update': True}, cc, self.logger, [])
+        cc_lxd.handle("cc_lxd", {"package_update": True}, cc, self.logger, [])
         self.assertFalse(cc.distro.install_packages.called)
         self.assertFalse(mock_subp.subp.called)
         self.assertFalse(m_maybe_clean.called)
 
     def test_lxd_debconf_new_full(self):
-        data = {"mode": "new",
-                "name": "testbr0",
-                "ipv4_address": "10.0.8.1",
-                "ipv4_netmask": "24",
-                "ipv4_dhcp_first": "10.0.8.2",
-                "ipv4_dhcp_last": "10.0.8.254",
-                "ipv4_dhcp_leases": "250",
-                "ipv4_nat": "true",
-                "ipv6_address": "fd98:9e0:3744::1",
-                "ipv6_netmask": "64",
-                "ipv6_nat": "true",
-                "domain": "lxd"}
+        data = {
+            "mode": "new",
+            "name": "testbr0",
+            "ipv4_address": "10.0.8.1",
+            "ipv4_netmask": "24",
+            "ipv4_dhcp_first": "10.0.8.2",
+            "ipv4_dhcp_last": "10.0.8.254",
+            "ipv4_dhcp_leases": "250",
+            "ipv4_nat": "true",
+            "ipv6_address": "fd98:9e0:3744::1",
+            "ipv6_netmask": "64",
+            "ipv6_nat": "true",
+            "domain": "lxd",
+        }
         self.assertEqual(
             cc_lxd.bridge_to_debconf(data),
-            {"lxd/setup-bridge": "true",
-             "lxd/bridge-name": "testbr0",
-             "lxd/bridge-ipv4": "true",
-             "lxd/bridge-ipv4-address": "10.0.8.1",
-             "lxd/bridge-ipv4-netmask": "24",
-             "lxd/bridge-ipv4-dhcp-first": "10.0.8.2",
-             "lxd/bridge-ipv4-dhcp-last": "10.0.8.254",
-             "lxd/bridge-ipv4-dhcp-leases": "250",
-             "lxd/bridge-ipv4-nat": "true",
-             "lxd/bridge-ipv6": "true",
-             "lxd/bridge-ipv6-address": "fd98:9e0:3744::1",
-             "lxd/bridge-ipv6-netmask": "64",
-             "lxd/bridge-ipv6-nat": "true",
-             "lxd/bridge-domain": "lxd"})
+            {
+                "lxd/setup-bridge": "true",
+                "lxd/bridge-name": "testbr0",
+                "lxd/bridge-ipv4": "true",
+                "lxd/bridge-ipv4-address": "10.0.8.1",
+                "lxd/bridge-ipv4-netmask": "24",
+                "lxd/bridge-ipv4-dhcp-first": "10.0.8.2",
+                "lxd/bridge-ipv4-dhcp-last": "10.0.8.254",
+                "lxd/bridge-ipv4-dhcp-leases": "250",
+                "lxd/bridge-ipv4-nat": "true",
+                "lxd/bridge-ipv6": "true",
+                "lxd/bridge-ipv6-address": "fd98:9e0:3744::1",
+                "lxd/bridge-ipv6-netmask": "64",
+                "lxd/bridge-ipv6-nat": "true",
+                "lxd/bridge-domain": "lxd",
+            },
+        )
 
     def test_lxd_debconf_new_partial(self):
-        data = {"mode": "new",
-                "ipv6_address": "fd98:9e0:3744::1",
-                "ipv6_netmask": "64",
-                "ipv6_nat": "true"}
+        data = {
+            "mode": "new",
+            "ipv6_address": "fd98:9e0:3744::1",
+            "ipv6_netmask": "64",
+            "ipv6_nat": "true",
+        }
         self.assertEqual(
             cc_lxd.bridge_to_debconf(data),
-            {"lxd/setup-bridge": "true",
-             "lxd/bridge-ipv6": "true",
-             "lxd/bridge-ipv6-address": "fd98:9e0:3744::1",
-             "lxd/bridge-ipv6-netmask": "64",
-             "lxd/bridge-ipv6-nat": "true"})
+            {
+                "lxd/setup-bridge": "true",
+                "lxd/bridge-ipv6": "true",
+                "lxd/bridge-ipv6-address": "fd98:9e0:3744::1",
+                "lxd/bridge-ipv6-netmask": "64",
+                "lxd/bridge-ipv6-nat": "true",
+            },
+        )
 
     def test_lxd_debconf_existing(self):
-        data = {"mode": "existing",
-                "name": "testbr0"}
+        data = {"mode": "existing", "name": "testbr0"}
         self.assertEqual(
             cc_lxd.bridge_to_debconf(data),
-            {"lxd/setup-bridge": "false",
-             "lxd/use-existing-bridge": "true",
-             "lxd/bridge-name": "testbr0"})
+            {
+                "lxd/setup-bridge": "false",
+                "lxd/use-existing-bridge": "true",
+                "lxd/bridge-name": "testbr0",
+            },
+        )
 
     def test_lxd_debconf_none(self):
         data = {"mode": "none"}
         self.assertEqual(
             cc_lxd.bridge_to_debconf(data),
-            {"lxd/setup-bridge": "false",
-             "lxd/bridge-name": ""})
+            {"lxd/setup-bridge": "false", "lxd/bridge-name": ""},
+        )
 
     def test_lxd_cmd_new_full(self):
-        data = {"mode": "new",
-                "name": "testbr0",
-                "ipv4_address": "10.0.8.1",
-                "ipv4_netmask": "24",
-                "ipv4_dhcp_first": "10.0.8.2",
-                "ipv4_dhcp_last": "10.0.8.254",
-                "ipv4_dhcp_leases": "250",
-                "ipv4_nat": "true",
-                "ipv6_address": "fd98:9e0:3744::1",
-                "ipv6_netmask": "64",
-                "ipv6_nat": "true",
-                "domain": "lxd"}
+        data = {
+            "mode": "new",
+            "name": "testbr0",
+            "ipv4_address": "10.0.8.1",
+            "ipv4_netmask": "24",
+            "ipv4_dhcp_first": "10.0.8.2",
+            "ipv4_dhcp_last": "10.0.8.254",
+            "ipv4_dhcp_leases": "250",
+            "ipv4_nat": "true",
+            "ipv6_address": "fd98:9e0:3744::1",
+            "ipv6_netmask": "64",
+            "ipv6_nat": "true",
+            "domain": "lxd",
+        }
         self.assertEqual(
             cc_lxd.bridge_to_cmd(data),
-            (["network", "create", "testbr0",
-              "ipv4.address=10.0.8.1/24", "ipv4.nat=true",
-              "ipv4.dhcp.ranges=10.0.8.2-10.0.8.254",
-              "ipv6.address=fd98:9e0:3744::1/64",
-              "ipv6.nat=true", "dns.domain=lxd"],
-             ["network", "attach-profile",
-              "testbr0", "default", "eth0"]))
+            (
+                [
+                    "network",
+                    "create",
+                    "testbr0",
+                    "ipv4.address=10.0.8.1/24",
+                    "ipv4.nat=true",
+                    "ipv4.dhcp.ranges=10.0.8.2-10.0.8.254",
+                    "ipv6.address=fd98:9e0:3744::1/64",
+                    "ipv6.nat=true",
+                    "dns.domain=lxd",
+                ],
+                ["network", "attach-profile", "testbr0", "default", "eth0"],
+            ),
+        )
 
     def test_lxd_cmd_new_partial(self):
-        data = {"mode": "new",
-                "ipv6_address": "fd98:9e0:3744::1",
-                "ipv6_netmask": "64",
-                "ipv6_nat": "true"}
+        data = {
+            "mode": "new",
+            "ipv6_address": "fd98:9e0:3744::1",
+            "ipv6_netmask": "64",
+            "ipv6_nat": "true",
+        }
         self.assertEqual(
             cc_lxd.bridge_to_cmd(data),
-            (["network", "create", "lxdbr0", "ipv4.address=none",
-              "ipv6.address=fd98:9e0:3744::1/64", "ipv6.nat=true"],
-             ["network", "attach-profile",
-              "lxdbr0", "default", "eth0"]))
+            (
+                [
+                    "network",
+                    "create",
+                    "lxdbr0",
+                    "ipv4.address=none",
+                    "ipv6.address=fd98:9e0:3744::1/64",
+                    "ipv6.nat=true",
+                ],
+                ["network", "attach-profile", "lxdbr0", "default", "eth0"],
+            ),
+        )
 
     def test_lxd_cmd_existing(self):
-        data = {"mode": "existing",
-                "name": "testbr0"}
+        data = {"mode": "existing", "name": "testbr0"}
         self.assertEqual(
             cc_lxd.bridge_to_cmd(data),
-            (None, ["network", "attach-profile",
-                    "testbr0", "default", "eth0"]))
+            (
+                None,
+                ["network", "attach-profile", "testbr0", "default", "eth0"],
+            ),
+        )
 
     def test_lxd_cmd_none(self):
         data = {"mode": "none"}
-        self.assertEqual(
-            cc_lxd.bridge_to_cmd(data),
-            (None, None))
+        self.assertEqual(cc_lxd.bridge_to_cmd(data), (None, None))
 
 
 class TestLxdMaybeCleanupDefault(t_help.CiTestCase):
@@ -190,21 +231,24 @@ class TestLxdMaybeCleanupDefault(t_help.CiTestCase):
     def test_network_other_than_default_not_deleted(self, m_lxc):
         """deletion or removal should only occur if bridge is default."""
         cc_lxd.maybe_cleanup_default(
-            net_name="lxdbr1", did_init=True, create=True, attach=True)
+            net_name="lxdbr1", did_init=True, create=True, attach=True
+        )
         m_lxc.assert_not_called()
 
     @mock.patch("cloudinit.config.cc_lxd._lxc")
     def test_did_init_false_does_not_delete(self, m_lxc):
         """deletion or removal should only occur if did_init is True."""
         cc_lxd.maybe_cleanup_default(
-            net_name=self.defnet, did_init=False, create=True, attach=True)
+            net_name=self.defnet, did_init=False, create=True, attach=True
+        )
         m_lxc.assert_not_called()
 
     @mock.patch("cloudinit.config.cc_lxd._lxc")
     def test_network_deleted_if_create_true(self, m_lxc):
         """deletion of network should occur if create is True."""
         cc_lxd.maybe_cleanup_default(
-            net_name=self.defnet, did_init=True, create=True, attach=False)
+            net_name=self.defnet, did_init=True, create=True, attach=False
+        )
         m_lxc.assert_called_with(["network", "delete", self.defnet])
 
     @mock.patch("cloudinit.config.cc_lxd._lxc")
@@ -213,10 +257,16 @@ class TestLxdMaybeCleanupDefault(t_help.CiTestCase):
         nic_name = "my_nic"
         profile = "my_profile"
         cc_lxd.maybe_cleanup_default(
-            net_name=self.defnet, did_init=True, create=False, attach=True,
-            profile=profile, nic_name=nic_name)
+            net_name=self.defnet,
+            did_init=True,
+            create=False,
+            attach=True,
+            profile=profile,
+            nic_name=nic_name,
+        )
         m_lxc.assert_called_once_with(
-            ["profile", "device", "remove", profile, nic_name])
+            ["profile", "device", "remove", profile, nic_name]
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_mcollective.py b/tests/unittests/config/test_cc_mcollective.py
index fff777b6..5cbdeb76 100644
--- a/tests/unittests/config/test_cc_mcollective.py
+++ b/tests/unittests/config/test_cc_mcollective.py
@@ -1,15 +1,15 @@
 # This file is part of cloud-init. See LICENSE file for license information.
-import configobj
 import logging
 import os
 import shutil
 import tempfile
 from io import BytesIO
 
-from cloudinit import (util)
+import configobj
+
+from cloudinit import util
 from cloudinit.config import cc_mcollective
 from tests.unittests import helpers as t_help
-
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -47,83 +47,92 @@ class TestConfig(t_help.FilesystemMockingTestCase):
         self.addCleanup(shutil.rmtree, self.tmp)
         # "./": make os.path.join behave correctly with abs path as second arg
         self.server_cfg = os.path.join(
-            self.tmp, "./" + cc_mcollective.SERVER_CFG)
+            self.tmp, "./" + cc_mcollective.SERVER_CFG
+        )
         self.pubcert_file = os.path.join(
-            self.tmp, "./" + cc_mcollective.PUBCERT_FILE)
+            self.tmp, "./" + cc_mcollective.PUBCERT_FILE
+        )
         self.pricert_file = os.path.join(
-            self.tmp, self.tmp, "./" + cc_mcollective.PRICERT_FILE)
+            self.tmp, self.tmp, "./" + cc_mcollective.PRICERT_FILE
+        )
 
     def test_basic_config(self):
         cfg = {
-            'mcollective': {
-                'conf': {
-                    'loglevel': 'debug',
-                    'connector': 'rabbitmq',
-                    'logfile': '/var/log/mcollective.log',
-                    'ttl': '4294957',
-                    'collectives': 'mcollective',
-                    'main_collective': 'mcollective',
-                    'securityprovider': 'psk',
-                    'daemonize': '1',
-                    'factsource': 'yaml',
-                    'direct_addressing': '1',
-                    'plugin.psk': 'unset',
-                    'libdir': '/usr/share/mcollective/plugins',
-                    'identity': '1',
+            "mcollective": {
+                "conf": {
+                    "loglevel": "debug",
+                    "connector": "rabbitmq",
+                    "logfile": "/var/log/mcollective.log",
+                    "ttl": "4294957",
+                    "collectives": "mcollective",
+                    "main_collective": "mcollective",
+                    "securityprovider": "psk",
+                    "daemonize": "1",
+                    "factsource": "yaml",
+                    "direct_addressing": "1",
+                    "plugin.psk": "unset",
+                    "libdir": "/usr/share/mcollective/plugins",
+                    "identity": "1",
                 },
             },
         }
-        expected = cfg['mcollective']['conf']
+        expected = cfg["mcollective"]["conf"]
 
         self.patchUtils(self.tmp)
-        cc_mcollective.configure(cfg['mcollective']['conf'])
+        cc_mcollective.configure(cfg["mcollective"]["conf"])
         contents = util.load_file(cc_mcollective.SERVER_CFG, decode=False)
         contents = configobj.ConfigObj(BytesIO(contents))
         self.assertEqual(expected, dict(contents))
 
     def test_existing_config_is_saved(self):
-        cfg = {'loglevel': 'warn'}
+        cfg = {"loglevel": "warn"}
         util.write_file(self.server_cfg, STOCK_CONFIG)
         cc_mcollective.configure(config=cfg, server_cfg=self.server_cfg)
         self.assertTrue(os.path.exists(self.server_cfg))
         self.assertTrue(os.path.exists(self.server_cfg + ".old"))
-        self.assertEqual(util.load_file(self.server_cfg + ".old"),
-                         STOCK_CONFIG)
+        self.assertEqual(
+            util.load_file(self.server_cfg + ".old"), STOCK_CONFIG
+        )
 
     def test_existing_updated(self):
-        cfg = {'loglevel': 'warn'}
+        cfg = {"loglevel": "warn"}
         util.write_file(self.server_cfg, STOCK_CONFIG)
         cc_mcollective.configure(config=cfg, server_cfg=self.server_cfg)
         cfgobj = configobj.ConfigObj(self.server_cfg)
-        self.assertEqual(cfg['loglevel'], cfgobj['loglevel'])
+        self.assertEqual(cfg["loglevel"], cfgobj["loglevel"])
 
     def test_certificats_written(self):
         # check public-cert and private-cert keys in config get written
-        cfg = {'loglevel': 'debug',
-               'public-cert': "this is my public-certificate",
-               'private-cert': "secret private certificate"}
+        cfg = {
+            "loglevel": "debug",
+            "public-cert": "this is my public-certificate",
+            "private-cert": "secret private certificate",
+        }
 
         cc_mcollective.configure(
-            config=cfg, server_cfg=self.server_cfg,
-            pricert_file=self.pricert_file, pubcert_file=self.pubcert_file)
+            config=cfg,
+            server_cfg=self.server_cfg,
+            pricert_file=self.pricert_file,
+            pubcert_file=self.pubcert_file,
+        )
 
         found = configobj.ConfigObj(self.server_cfg)
 
         # make sure these didnt get written in
-        self.assertFalse('public-cert' in found)
-        self.assertFalse('private-cert' in found)
+        self.assertFalse("public-cert" in found)
+        self.assertFalse("private-cert" in found)
 
         # these need updating to the specified paths
-        self.assertEqual(found['plugin.ssl_server_public'], self.pubcert_file)
-        self.assertEqual(found['plugin.ssl_server_private'], self.pricert_file)
+        self.assertEqual(found["plugin.ssl_server_public"], self.pubcert_file)
+        self.assertEqual(found["plugin.ssl_server_private"], self.pricert_file)
 
         # and the security provider should be ssl
-        self.assertEqual(found['securityprovider'], 'ssl')
+        self.assertEqual(found["securityprovider"], "ssl")
 
         self.assertEqual(
-            util.load_file(self.pricert_file), cfg['private-cert'])
-        self.assertEqual(
-            util.load_file(self.pubcert_file), cfg['public-cert'])
+            util.load_file(self.pricert_file), cfg["private-cert"]
+        )
+        self.assertEqual(util.load_file(self.pubcert_file), cfg["public-cert"])
 
 
 class TestHandler(t_help.TestCase):
@@ -133,14 +142,17 @@ class TestHandler(t_help.TestCase):
         cc = get_cloud()
         cc.distro = t_help.mock.MagicMock()
         mock_util.load_file.return_value = b""
-        mycfg = {'mcollective': {'conf': {'loglevel': 'debug'}}}
-        cc_mcollective.handle('cc_mcollective', mycfg, cc, LOG, [])
+        mycfg = {"mcollective": {"conf": {"loglevel": "debug"}}}
+        cc_mcollective.handle("cc_mcollective", mycfg, cc, LOG, [])
         self.assertTrue(cc.distro.install_packages.called)
         install_pkg = cc.distro.install_packages.call_args_list[0][0][0]
-        self.assertEqual(install_pkg, ('mcollective',))
+        self.assertEqual(install_pkg, ("mcollective",))
 
         self.assertTrue(mock_subp.subp.called)
-        self.assertEqual(mock_subp.subp.call_args_list[0][0][0],
-                         ['service', 'mcollective', 'restart'])
+        self.assertEqual(
+            mock_subp.subp.call_args_list[0][0][0],
+            ["service", "mcollective", "restart"],
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_mounts.py b/tests/unittests/config/test_cc_mounts.py
index fc65f108..084faacd 100644
--- a/tests/unittests/config/test_cc_mounts.py
+++ b/tests/unittests/config/test_cc_mounts.py
@@ -1,302 +1,363 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-import pytest
 import os.path
 from unittest import mock
 
-from tests.unittests import helpers as test_helpers
+import pytest
+
 from cloudinit.config import cc_mounts
 from cloudinit.config.cc_mounts import create_swapfile
 from cloudinit.subp import ProcessExecutionError
+from tests.unittests import helpers as test_helpers
 
-M_PATH = 'cloudinit.config.cc_mounts.'
+M_PATH = "cloudinit.config.cc_mounts."
 
 
 class TestSanitizeDevname(test_helpers.FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestSanitizeDevname, self).setUp()
         self.new_root = self.tmp_dir()
         self.patchOS(self.new_root)
 
     def _touch(self, path):
-        path = os.path.join(self.new_root, path.lstrip('/'))
+        path = os.path.join(self.new_root, path.lstrip("/"))
         basedir = os.path.dirname(path)
         if not os.path.exists(basedir):
             os.makedirs(basedir)
-        open(path, 'a').close()
+        open(path, "a").close()
 
     def _makedirs(self, directory):
-        directory = os.path.join(self.new_root, directory.lstrip('/'))
+        directory = os.path.join(self.new_root, directory.lstrip("/"))
         if not os.path.exists(directory):
             os.makedirs(directory)
 
     def mock_existence_of_disk(self, disk_path):
         self._touch(disk_path)
-        self._makedirs(os.path.join('/sys/block', disk_path.split('/')[-1]))
+        self._makedirs(os.path.join("/sys/block", disk_path.split("/")[-1]))
 
     def mock_existence_of_partition(self, disk_path, partition_number):
         self.mock_existence_of_disk(disk_path)
         self._touch(disk_path + str(partition_number))
-        disk_name = disk_path.split('/')[-1]
-        self._makedirs(os.path.join('/sys/block',
-                                    disk_name,
-                                    disk_name + str(partition_number)))
+        disk_name = disk_path.split("/")[-1]
+        self._makedirs(
+            os.path.join(
+                "/sys/block", disk_name, disk_name + str(partition_number)
+            )
+        )
 
     def test_existent_full_disk_path_is_returned(self):
-        disk_path = '/dev/sda'
+        disk_path = "/dev/sda"
         self.mock_existence_of_disk(disk_path)
-        self.assertEqual(disk_path,
-                         cc_mounts.sanitize_devname(disk_path,
-                                                    lambda x: None,
-                                                    mock.Mock()))
+        self.assertEqual(
+            disk_path,
+            cc_mounts.sanitize_devname(disk_path, lambda x: None, mock.Mock()),
+        )
 
     def test_existent_disk_name_returns_full_path(self):
-        disk_name = 'sda'
-        disk_path = '/dev/' + disk_name
+        disk_name = "sda"
+        disk_path = "/dev/" + disk_name
         self.mock_existence_of_disk(disk_path)
-        self.assertEqual(disk_path,
-                         cc_mounts.sanitize_devname(disk_name,
-                                                    lambda x: None,
-                                                    mock.Mock()))
+        self.assertEqual(
+            disk_path,
+            cc_mounts.sanitize_devname(disk_name, lambda x: None, mock.Mock()),
+        )
 
     def test_existent_meta_disk_is_returned(self):
-        actual_disk_path = '/dev/sda'
+        actual_disk_path = "/dev/sda"
         self.mock_existence_of_disk(actual_disk_path)
         self.assertEqual(
             actual_disk_path,
-            cc_mounts.sanitize_devname('ephemeral0',
-                                       lambda x: actual_disk_path,
-                                       mock.Mock()))
+            cc_mounts.sanitize_devname(
+                "ephemeral0", lambda x: actual_disk_path, mock.Mock()
+            ),
+        )
 
     def test_existent_meta_partition_is_returned(self):
-        disk_name, partition_part = '/dev/sda', '1'
+        disk_name, partition_part = "/dev/sda", "1"
         actual_partition_path = disk_name + partition_part
         self.mock_existence_of_partition(disk_name, partition_part)
         self.assertEqual(
             actual_partition_path,
-            cc_mounts.sanitize_devname('ephemeral0.1',
-                                       lambda x: disk_name,
-                                       mock.Mock()))
+            cc_mounts.sanitize_devname(
+                "ephemeral0.1", lambda x: disk_name, mock.Mock()
+            ),
+        )
 
     def test_existent_meta_partition_with_p_is_returned(self):
-        disk_name, partition_part = '/dev/sda', 'p1'
+        disk_name, partition_part = "/dev/sda", "p1"
         actual_partition_path = disk_name + partition_part
         self.mock_existence_of_partition(disk_name, partition_part)
         self.assertEqual(
             actual_partition_path,
-            cc_mounts.sanitize_devname('ephemeral0.1',
-                                       lambda x: disk_name,
-                                       mock.Mock()))
+            cc_mounts.sanitize_devname(
+                "ephemeral0.1", lambda x: disk_name, mock.Mock()
+            ),
+        )
 
     def test_first_partition_returned_if_existent_disk_is_partitioned(self):
-        disk_name, partition_part = '/dev/sda', '1'
+        disk_name, partition_part = "/dev/sda", "1"
         actual_partition_path = disk_name + partition_part
         self.mock_existence_of_partition(disk_name, partition_part)
         self.assertEqual(
             actual_partition_path,
-            cc_mounts.sanitize_devname('ephemeral0',
-                                       lambda x: disk_name,
-                                       mock.Mock()))
+            cc_mounts.sanitize_devname(
+                "ephemeral0", lambda x: disk_name, mock.Mock()
+            ),
+        )
 
     def test_nth_partition_returned_if_requested(self):
-        disk_name, partition_part = '/dev/sda', '3'
+        disk_name, partition_part = "/dev/sda", "3"
         actual_partition_path = disk_name + partition_part
         self.mock_existence_of_partition(disk_name, partition_part)
         self.assertEqual(
             actual_partition_path,
-            cc_mounts.sanitize_devname('ephemeral0.3',
-                                       lambda x: disk_name,
-                                       mock.Mock()))
+            cc_mounts.sanitize_devname(
+                "ephemeral0.3", lambda x: disk_name, mock.Mock()
+            ),
+        )
 
     def test_transformer_returning_none_returns_none(self):
         self.assertIsNone(
             cc_mounts.sanitize_devname(
-                'ephemeral0', lambda x: None, mock.Mock()))
+                "ephemeral0", lambda x: None, mock.Mock()
+            )
+        )
 
     def test_missing_device_returns_none(self):
         self.assertIsNone(
-            cc_mounts.sanitize_devname('/dev/sda', None, mock.Mock()))
+            cc_mounts.sanitize_devname("/dev/sda", None, mock.Mock())
+        )
 
     def test_missing_sys_returns_none(self):
-        disk_path = '/dev/sda'
+        disk_path = "/dev/sda"
         self._makedirs(disk_path)
         self.assertIsNone(
-            cc_mounts.sanitize_devname(disk_path, None, mock.Mock()))
+            cc_mounts.sanitize_devname(disk_path, None, mock.Mock())
+        )
 
     def test_existent_disk_but_missing_partition_returns_none(self):
-        disk_path = '/dev/sda'
+        disk_path = "/dev/sda"
         self.mock_existence_of_disk(disk_path)
         self.assertIsNone(
             cc_mounts.sanitize_devname(
-                'ephemeral0.1', lambda x: disk_path, mock.Mock()))
+                "ephemeral0.1", lambda x: disk_path, mock.Mock()
+            )
+        )
 
     def test_network_device_returns_network_device(self):
-        disk_path = 'netdevice:/path'
+        disk_path = "netdevice:/path"
         self.assertEqual(
-            disk_path,
-            cc_mounts.sanitize_devname(disk_path, None, mock.Mock()))
+            disk_path, cc_mounts.sanitize_devname(disk_path, None, mock.Mock())
+        )
 
     def test_device_aliases_remapping(self):
-        disk_path = '/dev/sda'
+        disk_path = "/dev/sda"
         self.mock_existence_of_disk(disk_path)
-        self.assertEqual(disk_path,
-                         cc_mounts.sanitize_devname('mydata',
-                                                    lambda x: None,
-                                                    mock.Mock(),
-                                                    {'mydata': disk_path}))
+        self.assertEqual(
+            disk_path,
+            cc_mounts.sanitize_devname(
+                "mydata", lambda x: None, mock.Mock(), {"mydata": disk_path}
+            ),
+        )
 
 
 class TestSwapFileCreation(test_helpers.FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestSwapFileCreation, self).setUp()
         self.new_root = self.tmp_dir()
         self.patchOS(self.new_root)
 
-        self.fstab_path = os.path.join(self.new_root, 'etc/fstab')
-        self.swap_path = os.path.join(self.new_root, 'swap.img')
-        self._makedirs('/etc')
+        self.fstab_path = os.path.join(self.new_root, "etc/fstab")
+        self.swap_path = os.path.join(self.new_root, "swap.img")
+        self._makedirs("/etc")
 
-        self.add_patch('cloudinit.config.cc_mounts.FSTAB_PATH',
-                       'mock_fstab_path',
-                       self.fstab_path,
-                       autospec=False)
-
-        self.add_patch('cloudinit.config.cc_mounts.subp.subp',
-                       'm_subp_subp')
+        self.add_patch(
+            "cloudinit.config.cc_mounts.FSTAB_PATH",
+            "mock_fstab_path",
+            self.fstab_path,
+            autospec=False,
+        )
 
-        self.add_patch('cloudinit.config.cc_mounts.util.mounts',
-                       'mock_util_mounts',
-                       return_value={
-                           '/dev/sda1': {'fstype': 'ext4',
-                                         'mountpoint': '/',
-                                         'opts': 'rw,relatime,discard'
-                                         }})
+        self.add_patch("cloudinit.config.cc_mounts.subp.subp", "m_subp_subp")
+
+        self.add_patch(
+            "cloudinit.config.cc_mounts.util.mounts",
+            "mock_util_mounts",
+            return_value={
+                "/dev/sda1": {
+                    "fstype": "ext4",
+                    "mountpoint": "/",
+                    "opts": "rw,relatime,discard",
+                }
+            },
+        )
 
         self.mock_cloud = mock.Mock()
         self.mock_log = mock.Mock()
         self.mock_cloud.device_name_to_device = self.device_name_to_device
 
         self.cc = {
-            'swap': {
-                'filename': self.swap_path,
-                'size': '512',
-                'maxsize': '512'}}
+            "swap": {
+                "filename": self.swap_path,
+                "size": "512",
+                "maxsize": "512",
+            }
+        }
 
     def _makedirs(self, directory):
-        directory = os.path.join(self.new_root, directory.lstrip('/'))
+        directory = os.path.join(self.new_root, directory.lstrip("/"))
         if not os.path.exists(directory):
             os.makedirs(directory)
 
     def device_name_to_device(self, path):
-        if path == 'swap':
+        if path == "swap":
             return self.swap_path
         else:
             dev = None
 
         return dev
 
-    @mock.patch('cloudinit.util.get_mount_info')
-    @mock.patch('cloudinit.util.kernel_version')
-    def test_swap_creation_method_fallocate_on_xfs(self, m_kernel_version,
-                                                   m_get_mount_info):
+    @mock.patch("cloudinit.util.get_mount_info")
+    @mock.patch("cloudinit.util.kernel_version")
+    def test_swap_creation_method_fallocate_on_xfs(
+        self, m_kernel_version, m_get_mount_info
+    ):
         m_kernel_version.return_value = (4, 20)
         m_get_mount_info.return_value = ["", "xfs"]
 
         cc_mounts.handle(None, self.cc, self.mock_cloud, self.mock_log, [])
-        self.m_subp_subp.assert_has_calls([
-            mock.call(['fallocate', '-l', '0M', self.swap_path], capture=True),
-            mock.call(['mkswap', self.swap_path]),
-            mock.call(['swapon', '-a'])])
-
-    @mock.patch('cloudinit.util.get_mount_info')
-    @mock.patch('cloudinit.util.kernel_version')
-    def test_swap_creation_method_xfs(self, m_kernel_version,
-                                      m_get_mount_info):
+        self.m_subp_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["fallocate", "-l", "0M", self.swap_path], capture=True
+                ),
+                mock.call(["mkswap", self.swap_path]),
+                mock.call(["swapon", "-a"]),
+            ]
+        )
+
+    @mock.patch("cloudinit.util.get_mount_info")
+    @mock.patch("cloudinit.util.kernel_version")
+    def test_swap_creation_method_xfs(
+        self, m_kernel_version, m_get_mount_info
+    ):
         m_kernel_version.return_value = (3, 18)
         m_get_mount_info.return_value = ["", "xfs"]
 
         cc_mounts.handle(None, self.cc, self.mock_cloud, self.mock_log, [])
-        self.m_subp_subp.assert_has_calls([
-            mock.call(['dd', 'if=/dev/zero',
-                       'of=' + self.swap_path,
-                       'bs=1M', 'count=0'], capture=True),
-            mock.call(['mkswap', self.swap_path]),
-            mock.call(['swapon', '-a'])])
-
-    @mock.patch('cloudinit.util.get_mount_info')
-    @mock.patch('cloudinit.util.kernel_version')
-    def test_swap_creation_method_btrfs(self, m_kernel_version,
-                                        m_get_mount_info):
+        self.m_subp_subp.assert_has_calls(
+            [
+                mock.call(
+                    [
+                        "dd",
+                        "if=/dev/zero",
+                        "of=" + self.swap_path,
+                        "bs=1M",
+                        "count=0",
+                    ],
+                    capture=True,
+                ),
+                mock.call(["mkswap", self.swap_path]),
+                mock.call(["swapon", "-a"]),
+            ]
+        )
+
+    @mock.patch("cloudinit.util.get_mount_info")
+    @mock.patch("cloudinit.util.kernel_version")
+    def test_swap_creation_method_btrfs(
+        self, m_kernel_version, m_get_mount_info
+    ):
         m_kernel_version.return_value = (4, 20)
         m_get_mount_info.return_value = ["", "btrfs"]
 
         cc_mounts.handle(None, self.cc, self.mock_cloud, self.mock_log, [])
-        self.m_subp_subp.assert_has_calls([
-            mock.call(['dd', 'if=/dev/zero',
-                       'of=' + self.swap_path,
-                       'bs=1M', 'count=0'], capture=True),
-            mock.call(['mkswap', self.swap_path]),
-            mock.call(['swapon', '-a'])])
-
-    @mock.patch('cloudinit.util.get_mount_info')
-    @mock.patch('cloudinit.util.kernel_version')
-    def test_swap_creation_method_ext4(self, m_kernel_version,
-                                       m_get_mount_info):
+        self.m_subp_subp.assert_has_calls(
+            [
+                mock.call(
+                    [
+                        "dd",
+                        "if=/dev/zero",
+                        "of=" + self.swap_path,
+                        "bs=1M",
+                        "count=0",
+                    ],
+                    capture=True,
+                ),
+                mock.call(["mkswap", self.swap_path]),
+                mock.call(["swapon", "-a"]),
+            ]
+        )
+
+    @mock.patch("cloudinit.util.get_mount_info")
+    @mock.patch("cloudinit.util.kernel_version")
+    def test_swap_creation_method_ext4(
+        self, m_kernel_version, m_get_mount_info
+    ):
         m_kernel_version.return_value = (5, 14)
         m_get_mount_info.return_value = ["", "ext4"]
 
         cc_mounts.handle(None, self.cc, self.mock_cloud, self.mock_log, [])
-        self.m_subp_subp.assert_has_calls([
-            mock.call(['fallocate', '-l', '0M', self.swap_path], capture=True),
-            mock.call(['mkswap', self.swap_path]),
-            mock.call(['swapon', '-a'])])
+        self.m_subp_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["fallocate", "-l", "0M", self.swap_path], capture=True
+                ),
+                mock.call(["mkswap", self.swap_path]),
+                mock.call(["swapon", "-a"]),
+            ]
+        )
 
 
 class TestFstabHandling(test_helpers.FilesystemMockingTestCase):
 
-    swap_path = '/dev/sdb1'
+    swap_path = "/dev/sdb1"
 
     def setUp(self):
         super(TestFstabHandling, self).setUp()
         self.new_root = self.tmp_dir()
         self.patchOS(self.new_root)
 
-        self.fstab_path = os.path.join(self.new_root, 'etc/fstab')
-        self._makedirs('/etc')
-
-        self.add_patch('cloudinit.config.cc_mounts.FSTAB_PATH',
-                       'mock_fstab_path',
-                       self.fstab_path,
-                       autospec=False)
+        self.fstab_path = os.path.join(self.new_root, "etc/fstab")
+        self._makedirs("/etc")
 
-        self.add_patch('cloudinit.config.cc_mounts._is_block_device',
-                       'mock_is_block_device',
-                       return_value=True)
+        self.add_patch(
+            "cloudinit.config.cc_mounts.FSTAB_PATH",
+            "mock_fstab_path",
+            self.fstab_path,
+            autospec=False,
+        )
 
-        self.add_patch('cloudinit.config.cc_mounts.subp.subp',
-                       'm_subp_subp')
+        self.add_patch(
+            "cloudinit.config.cc_mounts._is_block_device",
+            "mock_is_block_device",
+            return_value=True,
+        )
 
-        self.add_patch('cloudinit.config.cc_mounts.util.mounts',
-                       'mock_util_mounts',
-                       return_value={
-                           '/dev/sda1': {'fstype': 'ext4',
-                                         'mountpoint': '/',
-                                         'opts': 'rw,relatime,discard'
-                                         }})
+        self.add_patch("cloudinit.config.cc_mounts.subp.subp", "m_subp_subp")
+
+        self.add_patch(
+            "cloudinit.config.cc_mounts.util.mounts",
+            "mock_util_mounts",
+            return_value={
+                "/dev/sda1": {
+                    "fstype": "ext4",
+                    "mountpoint": "/",
+                    "opts": "rw,relatime,discard",
+                }
+            },
+        )
 
         self.mock_cloud = mock.Mock()
         self.mock_log = mock.Mock()
         self.mock_cloud.device_name_to_device = self.device_name_to_device
 
     def _makedirs(self, directory):
-        directory = os.path.join(self.new_root, directory.lstrip('/'))
+        directory = os.path.join(self.new_root, directory.lstrip("/"))
         if not os.path.exists(directory):
             os.makedirs(directory)
 
     def device_name_to_device(self, path):
-        if path == 'swap':
+        if path == "swap":
             return self.swap_path
         else:
             dev = None
@@ -304,127 +365,126 @@ class TestFstabHandling(test_helpers.FilesystemMockingTestCase):
         return dev
 
     def test_no_fstab(self):
-        """ Handle images which do not include an fstab. """
+        """Handle images which do not include an fstab."""
         self.assertFalse(os.path.exists(cc_mounts.FSTAB_PATH))
         fstab_expected_content = (
-            '%s\tnone\tswap\tsw,comment=cloudconfig\t'
-            '0\t0\n' % (self.swap_path,)
+            "%s\tnone\tswap\tsw,comment=cloudconfig\t0\t0\n"
+            % (self.swap_path,)
         )
         cc_mounts.handle(None, {}, self.mock_cloud, self.mock_log, [])
-        with open(cc_mounts.FSTAB_PATH, 'r') as fd:
+        with open(cc_mounts.FSTAB_PATH, "r") as fd:
             fstab_new_content = fd.read()
             self.assertEqual(fstab_expected_content, fstab_new_content)
 
     def test_swap_integrity(self):
-        '''Ensure that the swap file is correctly created and can
+        """Ensure that the swap file is correctly created and can
         swapon successfully. Fixing the corner case of:
-        kernel: swapon: swapfile has holes'''
+        kernel: swapon: swapfile has holes"""
 
-        fstab = '/swap.img swap swap defaults 0 0\n'
+        fstab = "/swap.img swap swap defaults 0 0\n"
 
-        with open(cc_mounts.FSTAB_PATH, 'w') as fd:
+        with open(cc_mounts.FSTAB_PATH, "w") as fd:
             fd.write(fstab)
-        cc = {'swap': ['filename: /swap.img', 'size: 512', 'maxsize: 512']}
+        cc = {"swap": ["filename: /swap.img", "size: 512", "maxsize: 512"]}
         cc_mounts.handle(None, cc, self.mock_cloud, self.mock_log, [])
 
     def test_fstab_no_swap_device(self):
-        '''Ensure that cloud-init adds a discovered swap partition
-        to /etc/fstab.'''
+        """Ensure that cloud-init adds a discovered swap partition
+        to /etc/fstab."""
 
-        fstab_original_content = ''
+        fstab_original_content = ""
         fstab_expected_content = (
-            '%s\tnone\tswap\tsw,comment=cloudconfig\t'
-            '0\t0\n' % (self.swap_path,)
+            "%s\tnone\tswap\tsw,comment=cloudconfig\t0\t0\n"
+            % (self.swap_path,)
         )
 
-        with open(cc_mounts.FSTAB_PATH, 'w') as fd:
+        with open(cc_mounts.FSTAB_PATH, "w") as fd:
             fd.write(fstab_original_content)
 
         cc_mounts.handle(None, {}, self.mock_cloud, self.mock_log, [])
 
-        with open(cc_mounts.FSTAB_PATH, 'r') as fd:
+        with open(cc_mounts.FSTAB_PATH, "r") as fd:
             fstab_new_content = fd.read()
             self.assertEqual(fstab_expected_content, fstab_new_content)
 
     def test_fstab_same_swap_device_already_configured(self):
-        '''Ensure that cloud-init will not add a swap device if the same
-        device already exists in /etc/fstab.'''
+        """Ensure that cloud-init will not add a swap device if the same
+        device already exists in /etc/fstab."""
 
-        fstab_original_content = '%s swap swap defaults 0 0\n' % (
-            self.swap_path,)
+        fstab_original_content = "%s swap swap defaults 0 0\n" % (
+            self.swap_path,
+        )
         fstab_expected_content = fstab_original_content
 
-        with open(cc_mounts.FSTAB_PATH, 'w') as fd:
+        with open(cc_mounts.FSTAB_PATH, "w") as fd:
             fd.write(fstab_original_content)
 
         cc_mounts.handle(None, {}, self.mock_cloud, self.mock_log, [])
 
-        with open(cc_mounts.FSTAB_PATH, 'r') as fd:
+        with open(cc_mounts.FSTAB_PATH, "r") as fd:
             fstab_new_content = fd.read()
             self.assertEqual(fstab_expected_content, fstab_new_content)
 
     def test_fstab_alternate_swap_device_already_configured(self):
-        '''Ensure that cloud-init will add a discovered swap device to
+        """Ensure that cloud-init will add a discovered swap device to
         /etc/fstab even when there exists a swap definition on another
-        device.'''
+        device."""
 
-        fstab_original_content = '/dev/sdc1 swap swap defaults 0 0\n'
+        fstab_original_content = "/dev/sdc1 swap swap defaults 0 0\n"
         fstab_expected_content = (
-            fstab_original_content +
-            '%s\tnone\tswap\tsw,comment=cloudconfig\t'
-            '0\t0\n' % (self.swap_path,)
+            fstab_original_content
+            + "%s\tnone\tswap\tsw,comment=cloudconfig\t0\t0\n"
+            % (self.swap_path,)
         )
 
-        with open(cc_mounts.FSTAB_PATH, 'w') as fd:
+        with open(cc_mounts.FSTAB_PATH, "w") as fd:
             fd.write(fstab_original_content)
 
         cc_mounts.handle(None, {}, self.mock_cloud, self.mock_log, [])
 
-        with open(cc_mounts.FSTAB_PATH, 'r') as fd:
+        with open(cc_mounts.FSTAB_PATH, "r") as fd:
             fstab_new_content = fd.read()
             self.assertEqual(fstab_expected_content, fstab_new_content)
 
     def test_no_change_fstab_sets_needs_mount_all(self):
-        '''verify unchanged fstab entries are mounted if not call mount -a'''
+        """verify unchanged fstab entries are mounted if not call mount -a"""
         fstab_original_content = (
-            'LABEL=cloudimg-rootfs / ext4 defaults 0 0\n'
-            'LABEL=UEFI /boot/efi vfat defaults 0 0\n'
-            '/dev/vdb /mnt auto defaults,noexec,comment=cloudconfig 0 2\n'
+            "LABEL=cloudimg-rootfs / ext4 defaults 0 0\n"
+            "LABEL=UEFI /boot/efi vfat defaults 0 0\n"
+            "/dev/vdb /mnt auto defaults,noexec,comment=cloudconfig 0 2\n"
         )
         fstab_expected_content = fstab_original_content
-        cc = {
-            'mounts': [
-                ['/dev/vdb', '/mnt', 'auto', 'defaults,noexec']
-            ]
-        }
-        with open(cc_mounts.FSTAB_PATH, 'w') as fd:
+        cc = {"mounts": [["/dev/vdb", "/mnt", "auto", "defaults,noexec"]]}
+        with open(cc_mounts.FSTAB_PATH, "w") as fd:
             fd.write(fstab_original_content)
-        with open(cc_mounts.FSTAB_PATH, 'r') as fd:
+        with open(cc_mounts.FSTAB_PATH, "r") as fd:
             fstab_new_content = fd.read()
             self.assertEqual(fstab_expected_content, fstab_new_content)
         cc_mounts.handle(None, cc, self.mock_cloud, self.mock_log, [])
-        self.m_subp_subp.assert_has_calls([
-            mock.call(['mount', '-a']),
-            mock.call(['systemctl', 'daemon-reload'])])
+        self.m_subp_subp.assert_has_calls(
+            [
+                mock.call(["mount", "-a"]),
+                mock.call(["systemctl", "daemon-reload"]),
+            ]
+        )
 
 
 class TestCreateSwapfile:
-
-    @pytest.mark.parametrize('fstype', ('xfs', 'btrfs', 'ext4', 'other'))
-    @mock.patch(M_PATH + 'util.get_mount_info')
-    @mock.patch(M_PATH + 'subp.subp')
+    @pytest.mark.parametrize("fstype", ("xfs", "btrfs", "ext4", "other"))
+    @mock.patch(M_PATH + "util.get_mount_info")
+    @mock.patch(M_PATH + "subp.subp")
     def test_happy_path(self, m_subp, m_get_mount_info, fstype, tmpdir):
         swap_file = tmpdir.join("swap-file")
         fname = str(swap_file)
 
         # Some of the calls to subp.subp should create the swap file; this
         # roughly approximates that
-        m_subp.side_effect = lambda *args, **kwargs: swap_file.write('')
+        m_subp.side_effect = lambda *args, **kwargs: swap_file.write("")
 
         m_get_mount_info.return_value = (mock.ANY, fstype)
 
-        create_swapfile(fname, '')
-        assert mock.call(['mkswap', fname]) in m_subp.call_args_list
+        create_swapfile(fname, "")
+        assert mock.call(["mkswap", fname]) in m_subp.call_args_list
 
     @mock.patch(M_PATH + "util.get_mount_info")
     @mock.patch(M_PATH + "subp.subp")
@@ -458,4 +518,5 @@ class TestCreateSwapfile:
         msg = "fallocate swap creation failed, will attempt with dd"
         assert msg in caplog.text
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_ntp.py b/tests/unittests/config/test_cc_ntp.py
index 3426533a..7da82cee 100644
--- a/tests/unittests/config/test_cc_ntp.py
+++ b/tests/unittests/config/test_cc_ntp.py
@@ -5,14 +5,16 @@ import shutil
 from functools import partial
 from os.path import dirname
 
-from cloudinit import (helpers, util)
+from cloudinit import helpers, util
 from cloudinit.config import cc_ntp
 from tests.unittests.helpers import (
-    CiTestCase, FilesystemMockingTestCase, mock, skipUnlessJsonSchema)
-
+    CiTestCase,
+    FilesystemMockingTestCase,
+    mock,
+    skipUnlessJsonSchema,
+)
 from tests.unittests.util import get_cloud
 
-
 NTP_TEMPLATE = """\
 ## template: jinja
 servers {{servers}}
@@ -35,18 +37,18 @@ class TestNtp(FilesystemMockingTestCase):
     def setUp(self):
         super(TestNtp, self).setUp()
         self.new_root = self.tmp_dir()
-        self.add_patch('cloudinit.util.system_is_snappy', 'm_snappy')
+        self.add_patch("cloudinit.util.system_is_snappy", "m_snappy")
         self.m_snappy.return_value = False
         self.new_root = self.reRoot()
         self._get_cloud = partial(
-            get_cloud,
-            paths=helpers.Paths({'templates_dir': self.new_root})
+            get_cloud, paths=helpers.Paths({"templates_dir": self.new_root})
         )
 
     def _get_template_path(self, template_name, distro, basepath=None):
         # ntp.conf.{distro} -> ntp.conf.debian.tmpl
-        template_fn = '{0}.tmpl'.format(
-            template_name.replace('{distro}', distro))
+        template_fn = "{0}.tmpl".format(
+            template_name.replace("{distro}", distro)
+        )
         if not basepath:
             basepath = self.new_root
         path = os.path.join(basepath, template_fn)
@@ -55,25 +57,25 @@ class TestNtp(FilesystemMockingTestCase):
     def _generate_template(self, template=None):
         if not template:
             template = NTP_TEMPLATE
-        confpath = os.path.join(self.new_root, 'client.conf')
-        template_fn = os.path.join(self.new_root, 'client.conf.tmpl')
+        confpath = os.path.join(self.new_root, "client.conf")
+        template_fn = os.path.join(self.new_root, "client.conf.tmpl")
         util.write_file(template_fn, content=template)
         return (confpath, template_fn)
 
     def _mock_ntp_client_config(self, client=None, distro=None):
         if not client:
-            client = 'ntp'
+            client = "ntp"
         if not distro:
-            distro = 'ubuntu'
+            distro = "ubuntu"
         dcfg = cc_ntp.distro_ntp_client_configs(distro)
-        if client == 'systemd-timesyncd':
+        if client == "systemd-timesyncd":
             template = TIMESYNCD_TEMPLATE
         else:
             template = NTP_TEMPLATE
         (confpath, _template_fn) = self._generate_template(template=template)
         ntpconfig = copy.deepcopy(dcfg[client])
-        ntpconfig['confpath'] = confpath
-        ntpconfig['template_name'] = os.path.basename(confpath)
+        ntpconfig["confpath"] = confpath
+        ntpconfig["template_name"] = os.path.basename(confpath)
         return ntpconfig
 
     @mock.patch("cloudinit.config.cc_ntp.subp")
@@ -81,19 +83,21 @@ class TestNtp(FilesystemMockingTestCase):
         """ntp_install_client runs install_func when check_exe is absent."""
         mock_subp.which.return_value = None  # check_exe not found.
         install_func = mock.MagicMock()
-        cc_ntp.install_ntp_client(install_func,
-                                  packages=['ntpx'], check_exe='ntpdx')
-        mock_subp.which.assert_called_with('ntpdx')
-        install_func.assert_called_once_with(['ntpx'])
+        cc_ntp.install_ntp_client(
+            install_func, packages=["ntpx"], check_exe="ntpdx"
+        )
+        mock_subp.which.assert_called_with("ntpdx")
+        install_func.assert_called_once_with(["ntpx"])
 
     @mock.patch("cloudinit.config.cc_ntp.subp")
     def test_ntp_install_not_needed(self, mock_subp):
         """ntp_install_client doesn't install when check_exe is found."""
-        client = 'chrony'
+        client = "chrony"
         mock_subp.which.return_value = [client]  # check_exe found.
         install_func = mock.MagicMock()
-        cc_ntp.install_ntp_client(install_func, packages=[client],
-                                  check_exe=client)
+        cc_ntp.install_ntp_client(
+            install_func, packages=[client], check_exe=client
+        )
         install_func.assert_not_called()
 
     @mock.patch("cloudinit.config.cc_ntp.subp")
@@ -101,8 +105,9 @@ class TestNtp(FilesystemMockingTestCase):
         """ntp_install_client runs install_func with empty list"""
         mock_subp.which.return_value = None  # check_exe not found
         install_func = mock.MagicMock()
-        cc_ntp.install_ntp_client(install_func, packages=[],
-                                  check_exe='timesyncd')
+        cc_ntp.install_ntp_client(
+            install_func, packages=[], check_exe="timesyncd"
+        )
         install_func.assert_called_once_with([])
 
     def test_ntp_rename_ntp_conf(self):
@@ -124,18 +129,22 @@ class TestNtp(FilesystemMockingTestCase):
     def test_write_ntp_config_template_uses_ntp_conf_distro_no_servers(self):
         """write_ntp_config_template reads from $client.conf.distro.tmpl"""
         servers = []
-        pools = ['10.0.0.1', '10.0.0.2']
+        pools = ["10.0.0.1", "10.0.0.2"]
         (confpath, template_fn) = self._generate_template()
-        mock_path = 'cloudinit.config.cc_ntp.temp_utils._TMPDIR'
+        mock_path = "cloudinit.config.cc_ntp.temp_utils._TMPDIR"
         with mock.patch(mock_path, self.new_root):
-            cc_ntp.write_ntp_config_template('ubuntu',
-                                             servers=servers, pools=pools,
-                                             path=confpath,
-                                             template_fn=template_fn,
-                                             template=None)
+            cc_ntp.write_ntp_config_template(
+                "ubuntu",
+                servers=servers,
+                pools=pools,
+                path=confpath,
+                template_fn=template_fn,
+                template=None,
+            )
         self.assertEqual(
             "servers []\npools ['10.0.0.1', '10.0.0.2']\n",
-            util.load_file(confpath))
+            util.load_file(confpath),
+        )
 
     def test_write_ntp_config_template_defaults_pools_w_empty_lists(self):
         """write_ntp_config_template defaults pools servers upon empty config.
@@ -143,20 +152,23 @@ class TestNtp(FilesystemMockingTestCase):
         When both pools and servers are empty, default NR_POOL_SERVERS get
         configured.
         """
-        distro = 'ubuntu'
+        distro = "ubuntu"
         pools = cc_ntp.generate_server_names(distro)
         servers = []
         (confpath, template_fn) = self._generate_template()
-        mock_path = 'cloudinit.config.cc_ntp.temp_utils._TMPDIR'
+        mock_path = "cloudinit.config.cc_ntp.temp_utils._TMPDIR"
         with mock.patch(mock_path, self.new_root):
-            cc_ntp.write_ntp_config_template(distro,
-                                             servers=servers, pools=pools,
-                                             path=confpath,
-                                             template_fn=template_fn,
-                                             template=None)
+            cc_ntp.write_ntp_config_template(
+                distro,
+                servers=servers,
+                pools=pools,
+                path=confpath,
+                template_fn=template_fn,
+                template=None,
+            )
         self.assertEqual(
-            "servers []\npools {0}\n".format(pools),
-            util.load_file(confpath))
+            "servers []\npools {0}\n".format(pools), util.load_file(confpath)
+        )
 
     def test_defaults_pools_empty_lists_sles(self):
         """write_ntp_config_template defaults opensuse pools upon empty config.
@@ -164,39 +176,50 @@ class TestNtp(FilesystemMockingTestCase):
         When both pools and servers are empty, default NR_POOL_SERVERS get
         configured.
         """
-        distro = 'sles'
+        distro = "sles"
         default_pools = cc_ntp.generate_server_names(distro)
         (confpath, template_fn) = self._generate_template()
 
-        cc_ntp.write_ntp_config_template(distro,
-                                         servers=[], pools=[],
-                                         path=confpath,
-                                         template_fn=template_fn,
-                                         template=None)
+        cc_ntp.write_ntp_config_template(
+            distro,
+            servers=[],
+            pools=[],
+            path=confpath,
+            template_fn=template_fn,
+            template=None,
+        )
         for pool in default_pools:
-            self.assertIn('opensuse', pool)
+            self.assertIn("opensuse", pool)
         self.assertEqual(
             "servers []\npools {0}\n".format(default_pools),
-            util.load_file(confpath))
+            util.load_file(confpath),
+        )
         self.assertIn(
             "Adding distro default ntp pool servers: {0}".format(
-                ",".join(default_pools)),
-            self.logs.getvalue())
+                ",".join(default_pools)
+            ),
+            self.logs.getvalue(),
+        )
 
     def test_timesyncd_template(self):
         """Test timesycnd template is correct"""
-        pools = ['0.mycompany.pool.ntp.org', '3.mycompany.pool.ntp.org']
-        servers = ['192.168.23.3', '192.168.23.4']
+        pools = ["0.mycompany.pool.ntp.org", "3.mycompany.pool.ntp.org"]
+        servers = ["192.168.23.3", "192.168.23.4"]
         (confpath, template_fn) = self._generate_template(
-            template=TIMESYNCD_TEMPLATE)
-        cc_ntp.write_ntp_config_template('ubuntu',
-                                         servers=servers, pools=pools,
-                                         path=confpath,
-                                         template_fn=template_fn,
-                                         template=None)
+            template=TIMESYNCD_TEMPLATE
+        )
+        cc_ntp.write_ntp_config_template(
+            "ubuntu",
+            servers=servers,
+            pools=pools,
+            path=confpath,
+            template_fn=template_fn,
+            template=None,
+        )
         self.assertEqual(
             "[Time]\nNTP=%s %s \n" % (" ".join(servers), " ".join(pools)),
-            util.load_file(confpath))
+            util.load_file(confpath),
+        )
 
     def test_distro_ntp_client_configs(self):
         """Test we have updated ntp client configs on different distros"""
@@ -213,55 +236,62 @@ class TestNtp(FilesystemMockingTestCase):
             result = cc_ntp.distro_ntp_client_configs(distro)
             for client in delta[distro].keys():
                 for key in delta[distro][client].keys():
-                    self.assertEqual(delta[distro][client][key],
-                                     result[client][key])
+                    self.assertEqual(
+                        delta[distro][client][key], result[client][key]
+                    )
 
     def _get_expected_pools(self, pools, distro, client):
-        if client in ['ntp', 'chrony']:
-            if client == 'ntp' and distro == 'alpine':
+        if client in ["ntp", "chrony"]:
+            if client == "ntp" and distro == "alpine":
                 # NTP for Alpine Linux is Busybox's ntp which does not
                 # support 'pool' lines in its configuration file.
                 expected_pools = []
             else:
                 expected_pools = [
-                    'pool {0} iburst'.format(pool) for pool in pools]
-        elif client == 'systemd-timesyncd':
+                    "pool {0} iburst".format(pool) for pool in pools
+                ]
+        elif client == "systemd-timesyncd":
             expected_pools = " ".join(pools)
 
         return expected_pools
 
     def _get_expected_servers(self, servers, distro, client):
-        if client in ['ntp', 'chrony']:
-            if client == 'ntp' and distro == 'alpine':
+        if client in ["ntp", "chrony"]:
+            if client == "ntp" and distro == "alpine":
                 # NTP for Alpine Linux is Busybox's ntp which only supports
                 # 'server' lines without iburst option.
                 expected_servers = [
-                    'server {0}'.format(srv) for srv in servers]
+                    "server {0}".format(srv) for srv in servers
+                ]
             else:
                 expected_servers = [
-                    'server {0} iburst'.format(srv) for srv in servers]
-        elif client == 'systemd-timesyncd':
+                    "server {0} iburst".format(srv) for srv in servers
+                ]
+        elif client == "systemd-timesyncd":
             expected_servers = " ".join(servers)
 
         return expected_servers
 
     def test_ntp_handler_real_distro_ntp_templates(self):
         """Test ntp handler renders the shipped distro ntp client templates."""
-        pools = ['0.mycompany.pool.ntp.org', '3.mycompany.pool.ntp.org']
-        servers = ['192.168.23.3', '192.168.23.4']
-        for client in ['ntp', 'systemd-timesyncd', 'chrony']:
+        pools = ["0.mycompany.pool.ntp.org", "3.mycompany.pool.ntp.org"]
+        servers = ["192.168.23.3", "192.168.23.4"]
+        for client in ["ntp", "systemd-timesyncd", "chrony"]:
             for distro in cc_ntp.distros:
                 distro_cfg = cc_ntp.distro_ntp_client_configs(distro)
                 ntpclient = distro_cfg[client]
-                confpath = (
-                    os.path.join(self.new_root, ntpclient.get('confpath')[1:]))
-                template = ntpclient.get('template_name')
+                confpath = os.path.join(
+                    self.new_root, ntpclient.get("confpath")[1:]
+                )
+                template = ntpclient.get("template_name")
                 # find sourcetree template file
                 root_dir = (
-                    dirname(dirname(os.path.realpath(util.__file__))) +
-                    '/templates')
-                source_fn = self._get_template_path(template, distro,
-                                                    basepath=root_dir)
+                    dirname(dirname(os.path.realpath(util.__file__)))
+                    + "/templates"
+                )
+                source_fn = self._get_template_path(
+                    template, distro, basepath=root_dir
+                )
                 template_fn = self._get_template_path(template, distro)
                 # don't fail if cloud-init doesn't have a template for
                 # a distro,client pair
@@ -269,64 +299,77 @@ class TestNtp(FilesystemMockingTestCase):
                     continue
                 # Create a copy in our tmp_dir
                 shutil.copy(source_fn, template_fn)
-                cc_ntp.write_ntp_config_template(distro, servers=servers,
-                                                 pools=pools, path=confpath,
-                                                 template_fn=template_fn)
+                cc_ntp.write_ntp_config_template(
+                    distro,
+                    servers=servers,
+                    pools=pools,
+                    path=confpath,
+                    template_fn=template_fn,
+                )
                 content = util.load_file(confpath)
-                if client in ['ntp', 'chrony']:
+                if client in ["ntp", "chrony"]:
                     content_lines = content.splitlines()
-                    expected_servers = self._get_expected_servers(servers,
-                                                                  distro,
-                                                                  client)
-                    print('distro=%s client=%s' % (distro, client))
+                    expected_servers = self._get_expected_servers(
+                        servers, distro, client
+                    )
+                    print("distro=%s client=%s" % (distro, client))
                     for sline in expected_servers:
-                        self.assertIn(sline, content_lines,
-                                      ('failed to render {0} conf'
-                                       ' for distro:{1}'.format(client,
-                                                                distro)))
-                    expected_pools = self._get_expected_pools(pools, distro,
-                                                              client)
+                        self.assertIn(
+                            sline,
+                            content_lines,
+                            "failed to render {0} conf for distro:{1}".format(
+                                client, distro
+                            ),
+                        )
+                    expected_pools = self._get_expected_pools(
+                        pools, distro, client
+                    )
                     if expected_pools != []:
                         for pline in expected_pools:
-                            self.assertIn(pline, content_lines,
-                                          ('failed to render {0} conf'
-                                           ' for distro:{1}'.format(client,
-                                                                    distro)))
-                elif client == 'systemd-timesyncd':
-                    expected_servers = self._get_expected_servers(servers,
-                                                                  distro,
-                                                                  client)
-                    expected_pools = self._get_expected_pools(pools,
-                                                              distro,
-                                                              client)
+                            self.assertIn(
+                                pline,
+                                content_lines,
+                                "failed to render {0} conf"
+                                " for distro:{1}".format(client, distro),
+                            )
+                elif client == "systemd-timesyncd":
+                    expected_servers = self._get_expected_servers(
+                        servers, distro, client
+                    )
+                    expected_pools = self._get_expected_pools(
+                        pools, distro, client
+                    )
                     expected_content = (
-                        "# cloud-init generated file\n" +
-                        "# See timesyncd.conf(5) for details.\n\n" +
-                        "[Time]\nNTP=%s %s \n" % (expected_servers,
-                                                  expected_pools))
+                        "# cloud-init generated file\n"
+                        + "# See timesyncd.conf(5) for details.\n\n"
+                        + "[Time]\nNTP=%s %s \n"
+                        % (expected_servers, expected_pools)
+                    )
                     self.assertEqual(expected_content, content)
 
     def test_no_ntpcfg_does_nothing(self):
         """When no ntp section is defined handler logs a warning and noops."""
-        cc_ntp.handle('cc_ntp', {}, None, None, [])
+        cc_ntp.handle("cc_ntp", {}, None, None, [])
         self.assertEqual(
-            'DEBUG: Skipping module named cc_ntp, '
-            'not present or disabled by cfg\n',
-            self.logs.getvalue())
+            "DEBUG: Skipping module named cc_ntp, "
+            "not present or disabled by cfg\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
-    def test_ntp_handler_schema_validation_allows_empty_ntp_config(self,
-                                                                   m_select):
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
+    def test_ntp_handler_schema_validation_allows_empty_ntp_config(
+        self, m_select
+    ):
         """Ntp schema validation allows for an empty ntp: configuration."""
-        valid_empty_configs = [{'ntp': {}}, {'ntp': None}]
+        valid_empty_configs = [{"ntp": {}}, {"ntp": None}]
         for valid_empty_config in valid_empty_configs:
             for distro in cc_ntp.distros:
                 mycloud = self._get_cloud(distro)
                 ntpconfig = self._mock_ntp_client_config(distro=distro)
-                confpath = ntpconfig['confpath']
+                confpath = ntpconfig["confpath"]
                 m_select.return_value = ntpconfig
-                cc_ntp.handle('cc_ntp', valid_empty_config, mycloud, None, [])
-                if distro == 'alpine':
+                cc_ntp.handle("cc_ntp", valid_empty_config, mycloud, None, [])
+                if distro == "alpine":
                     # _mock_ntp_client_config call above did not specify a
                     # client value and so it defaults to "ntp" which on
                     # Alpine Linux only supports servers and not pools.
@@ -334,217 +377,240 @@ class TestNtp(FilesystemMockingTestCase):
                     servers = cc_ntp.generate_server_names(mycloud.distro.name)
                     self.assertEqual(
                         "servers {0}\npools []\n".format(servers),
-                        util.load_file(confpath))
+                        util.load_file(confpath),
+                    )
                 else:
                     pools = cc_ntp.generate_server_names(mycloud.distro.name)
                     self.assertEqual(
                         "servers []\npools {0}\n".format(pools),
-                        util.load_file(confpath))
-            self.assertNotIn('Invalid config:', self.logs.getvalue())
+                        util.load_file(confpath),
+                    )
+            self.assertNotIn("Invalid config:", self.logs.getvalue())
 
     @skipUnlessJsonSchema()
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
-    def test_ntp_handler_schema_validation_warns_non_string_item_type(self,
-                                                                      m_sel):
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
+    def test_ntp_handler_schema_validation_warns_non_string_item_type(
+        self, m_sel
+    ):
         """Ntp schema validation warns of non-strings in pools or servers.
 
         Schema validation is not strict, so ntp config is still be rendered.
         """
-        invalid_config = {'ntp': {'pools': [123], 'servers': ['valid', None]}}
+        invalid_config = {"ntp": {"pools": [123], "servers": ["valid", None]}}
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
             ntpconfig = self._mock_ntp_client_config(distro=distro)
-            confpath = ntpconfig['confpath']
+            confpath = ntpconfig["confpath"]
             m_sel.return_value = ntpconfig
-            cc_ntp.handle('cc_ntp', invalid_config, mycloud, None, [])
+            cc_ntp.handle("cc_ntp", invalid_config, mycloud, None, [])
             self.assertIn(
                 "Invalid config:\nntp.pools.0: 123 is not of type 'string'\n"
                 "ntp.servers.1: None is not of type 'string'",
-                self.logs.getvalue())
-            self.assertEqual("servers ['valid', None]\npools [123]\n",
-                             util.load_file(confpath))
+                self.logs.getvalue(),
+            )
+            self.assertEqual(
+                "servers ['valid', None]\npools [123]\n",
+                util.load_file(confpath),
+            )
 
     @skipUnlessJsonSchema()
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
-    def test_ntp_handler_schema_validation_warns_of_non_array_type(self,
-                                                                   m_select):
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
+    def test_ntp_handler_schema_validation_warns_of_non_array_type(
+        self, m_select
+    ):
         """Ntp schema validation warns of non-array pools or servers types.
 
         Schema validation is not strict, so ntp config is still be rendered.
         """
-        invalid_config = {'ntp': {'pools': 123, 'servers': 'non-array'}}
+        invalid_config = {"ntp": {"pools": 123, "servers": "non-array"}}
 
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
             ntpconfig = self._mock_ntp_client_config(distro=distro)
-            confpath = ntpconfig['confpath']
+            confpath = ntpconfig["confpath"]
             m_select.return_value = ntpconfig
-            cc_ntp.handle('cc_ntp', invalid_config, mycloud, None, [])
+            cc_ntp.handle("cc_ntp", invalid_config, mycloud, None, [])
             self.assertIn(
                 "Invalid config:\nntp.pools: 123 is not of type 'array'\n"
                 "ntp.servers: 'non-array' is not of type 'array'",
-                self.logs.getvalue())
-            self.assertEqual("servers non-array\npools 123\n",
-                             util.load_file(confpath))
+                self.logs.getvalue(),
+            )
+            self.assertEqual(
+                "servers non-array\npools 123\n", util.load_file(confpath)
+            )
 
     @skipUnlessJsonSchema()
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
-    def test_ntp_handler_schema_validation_warns_invalid_key_present(self,
-                                                                     m_select):
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
+    def test_ntp_handler_schema_validation_warns_invalid_key_present(
+        self, m_select
+    ):
         """Ntp schema validation warns of invalid keys present in ntp config.
 
         Schema validation is not strict, so ntp config is still be rendered.
         """
         invalid_config = {
-            'ntp': {'invalidkey': 1, 'pools': ['0.mycompany.pool.ntp.org']}}
+            "ntp": {"invalidkey": 1, "pools": ["0.mycompany.pool.ntp.org"]}
+        }
         for distro in cc_ntp.distros:
-            if distro != 'alpine':
+            if distro != "alpine":
                 mycloud = self._get_cloud(distro)
                 ntpconfig = self._mock_ntp_client_config(distro=distro)
-                confpath = ntpconfig['confpath']
+                confpath = ntpconfig["confpath"]
                 m_select.return_value = ntpconfig
-                cc_ntp.handle('cc_ntp', invalid_config, mycloud, None, [])
+                cc_ntp.handle("cc_ntp", invalid_config, mycloud, None, [])
                 self.assertIn(
                     "Invalid config:\nntp: Additional properties are not "
                     "allowed ('invalidkey' was unexpected)",
-                    self.logs.getvalue())
+                    self.logs.getvalue(),
+                )
                 self.assertEqual(
                     "servers []\npools ['0.mycompany.pool.ntp.org']\n",
-                    util.load_file(confpath))
+                    util.load_file(confpath),
+                )
 
     @skipUnlessJsonSchema()
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
     def test_ntp_handler_schema_validation_warns_of_duplicates(self, m_select):
         """Ntp schema validation warns of duplicates in servers or pools.
 
         Schema validation is not strict, so ntp config is still be rendered.
         """
         invalid_config = {
-            'ntp': {'pools': ['0.mypool.org', '0.mypool.org'],
-                    'servers': ['10.0.0.1', '10.0.0.1']}}
+            "ntp": {
+                "pools": ["0.mypool.org", "0.mypool.org"],
+                "servers": ["10.0.0.1", "10.0.0.1"],
+            }
+        }
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
             ntpconfig = self._mock_ntp_client_config(distro=distro)
-            confpath = ntpconfig['confpath']
+            confpath = ntpconfig["confpath"]
             m_select.return_value = ntpconfig
-            cc_ntp.handle('cc_ntp', invalid_config, mycloud, None, [])
+            cc_ntp.handle("cc_ntp", invalid_config, mycloud, None, [])
             self.assertIn(
                 "Invalid config:\nntp.pools: ['0.mypool.org', '0.mypool.org']"
                 " has non-unique elements\nntp.servers: "
                 "['10.0.0.1', '10.0.0.1'] has non-unique elements",
-                self.logs.getvalue())
+                self.logs.getvalue(),
+            )
             self.assertEqual(
                 "servers ['10.0.0.1', '10.0.0.1']\n"
                 "pools ['0.mypool.org', '0.mypool.org']\n",
-                util.load_file(confpath))
+                util.load_file(confpath),
+            )
 
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
     def test_ntp_handler_timesyncd(self, m_select):
         """Test ntp handler configures timesyncd"""
-        servers = ['192.168.2.1', '192.168.2.2']
-        pools = ['0.mypool.org']
-        cfg = {'ntp': {'servers': servers, 'pools': pools}}
-        client = 'systemd-timesyncd'
+        servers = ["192.168.2.1", "192.168.2.2"]
+        pools = ["0.mypool.org"]
+        cfg = {"ntp": {"servers": servers, "pools": pools}}
+        client = "systemd-timesyncd"
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
-            ntpconfig = self._mock_ntp_client_config(distro=distro,
-                                                     client=client)
-            confpath = ntpconfig['confpath']
+            ntpconfig = self._mock_ntp_client_config(
+                distro=distro, client=client
+            )
+            confpath = ntpconfig["confpath"]
             m_select.return_value = ntpconfig
-            cc_ntp.handle('cc_ntp', cfg, mycloud, None, [])
+            cc_ntp.handle("cc_ntp", cfg, mycloud, None, [])
             self.assertEqual(
                 "[Time]\nNTP=192.168.2.1 192.168.2.2 0.mypool.org \n",
-                util.load_file(confpath))
+                util.load_file(confpath),
+            )
 
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
     def test_ntp_handler_enabled_false(self, m_select):
-        """Test ntp handler does not run if enabled: false """
-        cfg = {'ntp': {'enabled': False}}
+        """Test ntp handler does not run if enabled: false"""
+        cfg = {"ntp": {"enabled": False}}
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
-            cc_ntp.handle('notimportant', cfg, mycloud, None, None)
+            cc_ntp.handle("notimportant", cfg, mycloud, None, None)
             self.assertEqual(0, m_select.call_count)
 
     @mock.patch("cloudinit.distros.subp")
     @mock.patch("cloudinit.config.cc_ntp.subp")
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
     @mock.patch("cloudinit.distros.Distro.uses_systemd")
     def test_ntp_the_whole_package(self, m_sysd, m_select, m_subp, m_dsubp):
-        """Test enabled config renders template, and restarts service """
-        cfg = {'ntp': {'enabled': True}}
+        """Test enabled config renders template, and restarts service"""
+        cfg = {"ntp": {"enabled": True}}
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
             ntpconfig = self._mock_ntp_client_config(distro=distro)
-            confpath = ntpconfig['confpath']
-            service_name = ntpconfig['service_name']
+            confpath = ntpconfig["confpath"]
+            service_name = ntpconfig["service_name"]
             m_select.return_value = ntpconfig
 
             hosts = cc_ntp.generate_server_names(mycloud.distro.name)
             uses_systemd = True
-            expected_service_call = ['systemctl', 'reload-or-restart',
-                                     service_name]
+            expected_service_call = [
+                "systemctl",
+                "reload-or-restart",
+                service_name,
+            ]
             expected_content = "servers []\npools {0}\n".format(hosts)
 
-            if distro == 'alpine':
+            if distro == "alpine":
                 uses_systemd = False
-                expected_service_call = ['rc-service', service_name, 'restart']
+                expected_service_call = ["rc-service", service_name, "restart"]
                 # _mock_ntp_client_config call above did not specify a client
                 # value and so it defaults to "ntp" which on Alpine Linux only
                 # supports servers and not pools.
                 expected_content = "servers {0}\npools []\n".format(hosts)
 
             m_sysd.return_value = uses_systemd
-            with mock.patch('cloudinit.config.cc_ntp.util') as m_util:
+            with mock.patch("cloudinit.config.cc_ntp.util") as m_util:
                 # allow use of util.mergemanydict
                 m_util.mergemanydict.side_effect = util.mergemanydict
                 # default client is present
                 m_subp.which.return_value = True
                 # use the config 'enabled' value
                 m_util.is_false.return_value = util.is_false(
-                    cfg['ntp']['enabled'])
-                cc_ntp.handle('notimportant', cfg, mycloud, None, None)
+                    cfg["ntp"]["enabled"]
+                )
+                cc_ntp.handle("notimportant", cfg, mycloud, None, None)
                 m_dsubp.subp.assert_called_with(
-                    expected_service_call, capture=True)
+                    expected_service_call, capture=True
+                )
 
             self.assertEqual(expected_content, util.load_file(confpath))
 
-    @mock.patch('cloudinit.util.system_info')
+    @mock.patch("cloudinit.util.system_info")
     def test_opensuse_picks_chrony(self, m_sysinfo):
         """Test opensuse picks chrony or ntp on certain distro versions"""
         #  < 15.0  => ntp
-        m_sysinfo.return_value = {
-            'dist': ('openSUSE', '13.2', 'Harlequin')
-        }
-        mycloud = self._get_cloud('opensuse')
+        m_sysinfo.return_value = {"dist": ("openSUSE", "13.2", "Harlequin")}
+        mycloud = self._get_cloud("opensuse")
         expected_client = mycloud.distro.preferred_ntp_clients[0]
-        self.assertEqual('ntp', expected_client)
+        self.assertEqual("ntp", expected_client)
 
         #  >= 15.0 and  not openSUSE => chrony
         m_sysinfo.return_value = {
-            'dist': ('SLES', '15.0', 'SUSE Linux Enterprise Server 15')
+            "dist": ("SLES", "15.0", "SUSE Linux Enterprise Server 15")
         }
-        mycloud = self._get_cloud('sles')
+        mycloud = self._get_cloud("sles")
         expected_client = mycloud.distro.preferred_ntp_clients[0]
-        self.assertEqual('chrony', expected_client)
+        self.assertEqual("chrony", expected_client)
 
         #  >= 15.0 and  openSUSE and ver != 42  => chrony
         m_sysinfo.return_value = {
-            'dist': ('openSUSE Tumbleweed', '20180326', 'timbleweed')
+            "dist": ("openSUSE Tumbleweed", "20180326", "timbleweed")
         }
-        mycloud = self._get_cloud('opensuse')
+        mycloud = self._get_cloud("opensuse")
         expected_client = mycloud.distro.preferred_ntp_clients[0]
-        self.assertEqual('chrony', expected_client)
+        self.assertEqual("chrony", expected_client)
 
-    @mock.patch('cloudinit.util.system_info')
+    @mock.patch("cloudinit.util.system_info")
     def test_ubuntu_xenial_picks_ntp(self, m_sysinfo):
         """Test Ubuntu picks ntp on xenial release"""
 
-        m_sysinfo.return_value = {'dist': ('Ubuntu', '16.04', 'xenial')}
-        mycloud = self._get_cloud('ubuntu')
+        m_sysinfo.return_value = {"dist": ("Ubuntu", "16.04", "xenial")}
+        mycloud = self._get_cloud("ubuntu")
         expected_client = mycloud.distro.preferred_ntp_clients[0]
-        self.assertEqual('ntp', expected_client)
+        self.assertEqual("ntp", expected_client)
 
-    @mock.patch('cloudinit.config.cc_ntp.subp.which')
+    @mock.patch("cloudinit.config.cc_ntp.subp.which")
     def test_snappy_system_picks_timesyncd(self, m_which):
         """Test snappy systems prefer installed clients"""
 
@@ -552,26 +618,27 @@ class TestNtp(FilesystemMockingTestCase):
         self.m_snappy.return_value = True
 
         # ubuntu core systems will have timesyncd installed
-        m_which.side_effect = iter([None, '/lib/systemd/systemd-timesyncd',
-                                    None, None, None])
-        distro = 'ubuntu'
+        m_which.side_effect = iter(
+            [None, "/lib/systemd/systemd-timesyncd", None, None, None]
+        )
+        distro = "ubuntu"
         mycloud = self._get_cloud(distro)
         distro_configs = cc_ntp.distro_ntp_client_configs(distro)
-        expected_client = 'systemd-timesyncd'
+        expected_client = "systemd-timesyncd"
         expected_cfg = distro_configs[expected_client]
         expected_calls = []
         # we only get to timesyncd
         for client in mycloud.distro.preferred_ntp_clients[0:2]:
             cfg = distro_configs[client]
-            expected_calls.append(mock.call(cfg['check_exe']))
+            expected_calls.append(mock.call(cfg["check_exe"]))
         result = cc_ntp.select_ntp_client(None, mycloud.distro)
         m_which.assert_has_calls(expected_calls)
         self.assertEqual(sorted(expected_cfg), sorted(cfg))
         self.assertEqual(sorted(expected_cfg), sorted(result))
 
-    @mock.patch('cloudinit.config.cc_ntp.subp.which')
+    @mock.patch("cloudinit.config.cc_ntp.subp.which")
     def test_ntp_distro_searches_all_preferred_clients(self, m_which):
-        """Test select_ntp_client search all distro perferred clients """
+        """Test select_ntp_client search all distro perferred clients"""
         # nothing is installed
         m_which.return_value = None
         for distro in cc_ntp.distros:
@@ -582,12 +649,12 @@ class TestNtp(FilesystemMockingTestCase):
             expected_calls = []
             for client in mycloud.distro.preferred_ntp_clients:
                 cfg = distro_configs[client]
-                expected_calls.append(mock.call(cfg['check_exe']))
+                expected_calls.append(mock.call(cfg["check_exe"]))
             cc_ntp.select_ntp_client({}, mycloud.distro)
             m_which.assert_has_calls(expected_calls)
             self.assertEqual(sorted(expected_cfg), sorted(cfg))
 
-    @mock.patch('cloudinit.config.cc_ntp.subp.which')
+    @mock.patch("cloudinit.config.cc_ntp.subp.which")
     def test_user_cfg_ntp_client_auto_uses_distro_clients(self, m_which):
         """Test user_cfg.ntp_client='auto' defaults to distro search"""
         # nothing is installed
@@ -600,34 +667,36 @@ class TestNtp(FilesystemMockingTestCase):
             expected_calls = []
             for client in mycloud.distro.preferred_ntp_clients:
                 cfg = distro_configs[client]
-                expected_calls.append(mock.call(cfg['check_exe']))
-            cc_ntp.select_ntp_client('auto', mycloud.distro)
+                expected_calls.append(mock.call(cfg["check_exe"]))
+            cc_ntp.select_ntp_client("auto", mycloud.distro)
             m_which.assert_has_calls(expected_calls)
             self.assertEqual(sorted(expected_cfg), sorted(cfg))
 
-    @mock.patch('cloudinit.config.cc_ntp.write_ntp_config_template')
-    @mock.patch('cloudinit.cloud.Cloud.get_template_filename')
-    @mock.patch('cloudinit.config.cc_ntp.subp.which')
-    def test_ntp_custom_client_overrides_installed_clients(self, m_which,
-                                                           m_tmpfn, m_write):
-        """Test user client is installed despite other clients present """
-        client = 'ntpdate'
-        cfg = {'ntp': {'ntp_client': client}}
+    @mock.patch("cloudinit.config.cc_ntp.write_ntp_config_template")
+    @mock.patch("cloudinit.cloud.Cloud.get_template_filename")
+    @mock.patch("cloudinit.config.cc_ntp.subp.which")
+    def test_ntp_custom_client_overrides_installed_clients(
+        self, m_which, m_tmpfn, m_write
+    ):
+        """Test user client is installed despite other clients present"""
+        client = "ntpdate"
+        cfg = {"ntp": {"ntp_client": client}}
         for distro in cc_ntp.distros:
             # client is not installed
             m_which.side_effect = iter([None])
             mycloud = self._get_cloud(distro)
-            with mock.patch.object(mycloud.distro,
-                                   'install_packages') as m_install:
-                cc_ntp.handle('notimportant', cfg, mycloud, None, None)
+            with mock.patch.object(
+                mycloud.distro, "install_packages"
+            ) as m_install:
+                cc_ntp.handle("notimportant", cfg, mycloud, None, None)
             m_install.assert_called_with([client])
             m_which.assert_called_with(client)
 
-    @mock.patch('cloudinit.config.cc_ntp.subp.which')
+    @mock.patch("cloudinit.config.cc_ntp.subp.which")
     def test_ntp_system_config_overrides_distro_builtin_clients(self, m_which):
         """Test distro system_config overrides builtin preferred ntp clients"""
-        system_client = 'chrony'
-        sys_cfg = {'ntp_client': system_client}
+        system_client = "chrony"
+        sys_cfg = {"ntp_client": system_client}
         # no clients installed
         m_which.return_value = None
         for distro in cc_ntp.distros:
@@ -638,12 +707,12 @@ class TestNtp(FilesystemMockingTestCase):
             self.assertEqual(sorted(expected_cfg), sorted(result))
             m_which.assert_has_calls([])
 
-    @mock.patch('cloudinit.config.cc_ntp.subp.which')
+    @mock.patch("cloudinit.config.cc_ntp.subp.which")
     def test_ntp_user_config_overrides_system_cfg(self, m_which):
         """Test user-data overrides system_config ntp_client"""
-        system_client = 'chrony'
-        sys_cfg = {'ntp_client': system_client}
-        user_client = 'systemd-timesyncd'
+        system_client = "chrony"
+        sys_cfg = {"ntp_client": system_client}
+        user_client = "systemd-timesyncd"
         # no clients installed
         m_which.return_value = None
         for distro in cc_ntp.distros:
@@ -654,112 +723,145 @@ class TestNtp(FilesystemMockingTestCase):
             self.assertEqual(sorted(expected_cfg), sorted(result))
             m_which.assert_has_calls([])
 
-    @mock.patch('cloudinit.config.cc_ntp.install_ntp_client')
+    @mock.patch("cloudinit.config.cc_ntp.install_ntp_client")
     def test_ntp_user_provided_config_with_template(self, m_install):
-        custom = r'\n#MyCustomTemplate'
+        custom = r"\n#MyCustomTemplate"
         user_template = NTP_TEMPLATE + custom
-        confpath = os.path.join(self.new_root, 'etc/myntp/myntp.conf')
+        confpath = os.path.join(self.new_root, "etc/myntp/myntp.conf")
         cfg = {
-            'ntp': {
-                'pools': ['mypool.org'],
-                'ntp_client': 'myntpd',
-                'config': {
-                    'check_exe': 'myntpd',
-                    'confpath': confpath,
-                    'packages': ['myntp'],
-                    'service_name': 'myntp',
-                    'template': user_template,
-                }
+            "ntp": {
+                "pools": ["mypool.org"],
+                "ntp_client": "myntpd",
+                "config": {
+                    "check_exe": "myntpd",
+                    "confpath": confpath,
+                    "packages": ["myntp"],
+                    "service_name": "myntp",
+                    "template": user_template,
+                },
             }
         }
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
-            mock_path = 'cloudinit.config.cc_ntp.temp_utils._TMPDIR'
+            mock_path = "cloudinit.config.cc_ntp.temp_utils._TMPDIR"
             with mock.patch(mock_path, self.new_root):
-                cc_ntp.handle('notimportant', cfg, mycloud, None, None)
+                cc_ntp.handle("notimportant", cfg, mycloud, None, None)
             self.assertEqual(
                 "servers []\npools ['mypool.org']\n%s" % custom,
-                util.load_file(confpath))
-
-    @mock.patch('cloudinit.config.cc_ntp.supplemental_schema_validation')
-    @mock.patch('cloudinit.config.cc_ntp.install_ntp_client')
-    @mock.patch('cloudinit.config.cc_ntp.select_ntp_client')
-    def test_ntp_user_provided_config_template_only(self, m_select, m_install,
-                                                    m_schema):
+                util.load_file(confpath),
+            )
+
+    @mock.patch("cloudinit.config.cc_ntp.supplemental_schema_validation")
+    @mock.patch("cloudinit.config.cc_ntp.install_ntp_client")
+    @mock.patch("cloudinit.config.cc_ntp.select_ntp_client")
+    def test_ntp_user_provided_config_template_only(
+        self, m_select, m_install, m_schema
+    ):
         """Test custom template for default client"""
-        custom = r'\n#MyCustomTemplate'
+        custom = r"\n#MyCustomTemplate"
         user_template = NTP_TEMPLATE + custom
-        client = 'chrony'
+        client = "chrony"
         cfg = {
-            'pools': ['mypool.org'],
-            'ntp_client': client,
-            'config': {
-                'template': user_template,
-            }
+            "pools": ["mypool.org"],
+            "ntp_client": client,
+            "config": {
+                "template": user_template,
+            },
         }
         expected_merged_cfg = {
-            'check_exe': 'chronyd',
-            'confpath': '{tmpdir}/client.conf'.format(tmpdir=self.new_root),
-            'template_name': 'client.conf', 'template': user_template,
-            'service_name': 'chrony', 'packages': ['chrony']}
+            "check_exe": "chronyd",
+            "confpath": "{tmpdir}/client.conf".format(tmpdir=self.new_root),
+            "template_name": "client.conf",
+            "template": user_template,
+            "service_name": "chrony",
+            "packages": ["chrony"],
+        }
         for distro in cc_ntp.distros:
             mycloud = self._get_cloud(distro)
-            ntpconfig = self._mock_ntp_client_config(client=client,
-                                                     distro=distro)
-            confpath = ntpconfig['confpath']
+            ntpconfig = self._mock_ntp_client_config(
+                client=client, distro=distro
+            )
+            confpath = ntpconfig["confpath"]
             m_select.return_value = ntpconfig
-            mock_path = 'cloudinit.config.cc_ntp.temp_utils._TMPDIR'
+            mock_path = "cloudinit.config.cc_ntp.temp_utils._TMPDIR"
             with mock.patch(mock_path, self.new_root):
-                cc_ntp.handle('notimportant',
-                              {'ntp': cfg}, mycloud, None, None)
+                cc_ntp.handle(
+                    "notimportant", {"ntp": cfg}, mycloud, None, None
+                )
             self.assertEqual(
                 "servers []\npools ['mypool.org']\n%s" % custom,
-                util.load_file(confpath))
+                util.load_file(confpath),
+            )
         m_schema.assert_called_with(expected_merged_cfg)
 
 
 class TestSupplementalSchemaValidation(CiTestCase):
-
     def test_error_on_missing_keys(self):
         """ValueError raised reporting any missing required ntp:config keys"""
         cfg = {}
-        match = (r'Invalid ntp configuration:\\nMissing required ntp:config'
-                 ' keys: check_exe, confpath, packages, service_name')
+        match = (
+            r"Invalid ntp configuration:\\nMissing required ntp:config"
+            " keys: check_exe, confpath, packages, service_name"
+        )
         with self.assertRaisesRegex(ValueError, match):
             cc_ntp.supplemental_schema_validation(cfg)
 
     def test_error_requiring_either_template_or_template_name(self):
         """ValueError raised if both template not template_name are None."""
-        cfg = {'confpath': 'someconf', 'check_exe': '', 'service_name': '',
-               'template': None, 'template_name': None, 'packages': []}
-        match = (r'Invalid ntp configuration:\\nEither ntp:config:template'
-                 ' or ntp:config:template_name values are required')
+        cfg = {
+            "confpath": "someconf",
+            "check_exe": "",
+            "service_name": "",
+            "template": None,
+            "template_name": None,
+            "packages": [],
+        }
+        match = (
+            r"Invalid ntp configuration:\\nEither ntp:config:template"
+            " or ntp:config:template_name values are required"
+        )
         with self.assertRaisesRegex(ValueError, match):
             cc_ntp.supplemental_schema_validation(cfg)
 
     def test_error_on_non_list_values(self):
         """ValueError raised when packages is not of type list."""
-        cfg = {'confpath': 'someconf', 'check_exe': '', 'service_name': '',
-               'template': 'asdf', 'template_name': None, 'packages': 'NOPE'}
-        match = (r'Invalid ntp configuration:\\nExpected a list of required'
-                 ' package names for ntp:config:packages. Found \\(NOPE\\)')
+        cfg = {
+            "confpath": "someconf",
+            "check_exe": "",
+            "service_name": "",
+            "template": "asdf",
+            "template_name": None,
+            "packages": "NOPE",
+        }
+        match = (
+            r"Invalid ntp configuration:\\nExpected a list of required"
+            " package names for ntp:config:packages. Found \\(NOPE\\)"
+        )
         with self.assertRaisesRegex(ValueError, match):
             cc_ntp.supplemental_schema_validation(cfg)
 
     def test_error_on_non_string_values(self):
         """ValueError raised for any values expected as string type."""
-        cfg = {'confpath': 1, 'check_exe': 2, 'service_name': 3,
-               'template': 4, 'template_name': 5, 'packages': []}
+        cfg = {
+            "confpath": 1,
+            "check_exe": 2,
+            "service_name": 3,
+            "template": 4,
+            "template_name": 5,
+            "packages": [],
+        }
         errors = [
-            'Expected a config file path ntp:config:confpath. Found (1)',
-            'Expected a string type for ntp:config:check_exe. Found (2)',
-            'Expected a string type for ntp:config:service_name. Found (3)',
-            'Expected a string type for ntp:config:template. Found (4)',
-            'Expected a string type for ntp:config:template_name. Found (5)']
+            "Expected a config file path ntp:config:confpath. Found (1)",
+            "Expected a string type for ntp:config:check_exe. Found (2)",
+            "Expected a string type for ntp:config:service_name. Found (3)",
+            "Expected a string type for ntp:config:template. Found (4)",
+            "Expected a string type for ntp:config:template_name. Found (5)",
+        ]
         with self.assertRaises(ValueError) as context_mgr:
             cc_ntp.supplemental_schema_validation(cfg)
         error_msg = str(context_mgr.exception)
         for error in errors:
             self.assertIn(error, error_msg)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_power_state_change.py b/tests/unittests/config/test_cc_power_state_change.py
index e699f424..47eb0d58 100644
--- a/tests/unittests/config/test_cc_power_state_change.py
+++ b/tests/unittests/config/test_cc_power_state_change.py
@@ -2,11 +2,8 @@
 
 import sys
 
+from cloudinit import distros, helpers
 from cloudinit.config import cc_power_state_change as psc
-
-from cloudinit import distros
-from cloudinit import helpers
-
 from tests.unittests import helpers as t_help
 from tests.unittests.helpers import mock
 
@@ -14,9 +11,9 @@ from tests.unittests.helpers import mock
 class TestLoadPowerState(t_help.TestCase):
     def setUp(self):
         super(TestLoadPowerState, self).setUp()
-        cls = distros.fetch('ubuntu')
+        cls = distros.fetch("ubuntu")
         paths = helpers.Paths({})
-        self.dist = cls('ubuntu', {}, paths)
+        self.dist = cls("ubuntu", {}, paths)
 
     def test_no_config(self):
         # completely empty config should mean do nothing
@@ -25,85 +22,86 @@ class TestLoadPowerState(t_help.TestCase):
 
     def test_irrelevant_config(self):
         # no power_state field in config should return None for cmd
-        (cmd, _timeout, _condition) = psc.load_power_state({'foo': 'bar'},
-                                                           self.dist)
+        (cmd, _timeout, _condition) = psc.load_power_state(
+            {"foo": "bar"}, self.dist
+        )
         self.assertIsNone(cmd)
 
     def test_invalid_mode(self):
 
-        cfg = {'power_state': {'mode': 'gibberish'}}
+        cfg = {"power_state": {"mode": "gibberish"}}
         self.assertRaises(TypeError, psc.load_power_state, cfg, self.dist)
 
-        cfg = {'power_state': {'mode': ''}}
+        cfg = {"power_state": {"mode": ""}}
         self.assertRaises(TypeError, psc.load_power_state, cfg, self.dist)
 
     def test_empty_mode(self):
-        cfg = {'power_state': {'message': 'goodbye'}}
+        cfg = {"power_state": {"message": "goodbye"}}
         self.assertRaises(TypeError, psc.load_power_state, cfg, self.dist)
 
     def test_valid_modes(self):
-        cfg = {'power_state': {}}
-        for mode in ('halt', 'poweroff', 'reboot'):
-            cfg['power_state']['mode'] = mode
+        cfg = {"power_state": {}}
+        for mode in ("halt", "poweroff", "reboot"):
+            cfg["power_state"]["mode"] = mode
             check_lps_ret(psc.load_power_state(cfg, self.dist), mode=mode)
 
     def test_invalid_delay(self):
-        cfg = {'power_state': {'mode': 'poweroff', 'delay': 'goodbye'}}
+        cfg = {"power_state": {"mode": "poweroff", "delay": "goodbye"}}
         self.assertRaises(TypeError, psc.load_power_state, cfg, self.dist)
 
     def test_valid_delay(self):
-        cfg = {'power_state': {'mode': 'poweroff', 'delay': ''}}
+        cfg = {"power_state": {"mode": "poweroff", "delay": ""}}
         for delay in ("now", "+1", "+30"):
-            cfg['power_state']['delay'] = delay
+            cfg["power_state"]["delay"] = delay
             check_lps_ret(psc.load_power_state(cfg, self.dist))
 
     def test_message_present(self):
-        cfg = {'power_state': {'mode': 'poweroff', 'message': 'GOODBYE'}}
+        cfg = {"power_state": {"mode": "poweroff", "message": "GOODBYE"}}
         ret = psc.load_power_state(cfg, self.dist)
         check_lps_ret(psc.load_power_state(cfg, self.dist))
-        self.assertIn(cfg['power_state']['message'], ret[0])
+        self.assertIn(cfg["power_state"]["message"], ret[0])
 
     def test_no_message(self):
         # if message is not present, then no argument should be passed for it
-        cfg = {'power_state': {'mode': 'poweroff'}}
+        cfg = {"power_state": {"mode": "poweroff"}}
         (cmd, _timeout, _condition) = psc.load_power_state(cfg, self.dist)
         self.assertNotIn("", cmd)
         check_lps_ret(psc.load_power_state(cfg, self.dist))
         self.assertTrue(len(cmd) == 3)
 
     def test_condition_null_raises(self):
-        cfg = {'power_state': {'mode': 'poweroff', 'condition': None}}
+        cfg = {"power_state": {"mode": "poweroff", "condition": None}}
         self.assertRaises(TypeError, psc.load_power_state, cfg, self.dist)
 
     def test_condition_default_is_true(self):
-        cfg = {'power_state': {'mode': 'poweroff'}}
+        cfg = {"power_state": {"mode": "poweroff"}}
         _cmd, _timeout, cond = psc.load_power_state(cfg, self.dist)
         self.assertEqual(cond, True)
 
     def test_freebsd_poweroff_uses_lowercase_p(self):
-        cls = distros.fetch('freebsd')
+        cls = distros.fetch("freebsd")
         paths = helpers.Paths({})
-        freebsd = cls('freebsd', {}, paths)
-        cfg = {'power_state': {'mode': 'poweroff'}}
+        freebsd = cls("freebsd", {}, paths)
+        cfg = {"power_state": {"mode": "poweroff"}}
         ret = psc.load_power_state(cfg, freebsd)
-        self.assertIn('-p', ret[0])
+        self.assertIn("-p", ret[0])
 
     def test_alpine_delay(self):
         # alpine takes delay in seconds.
-        cls = distros.fetch('alpine')
+        cls = distros.fetch("alpine")
         paths = helpers.Paths({})
-        alpine = cls('alpine', {}, paths)
-        cfg = {'power_state': {'mode': 'poweroff', 'delay': ''}}
-        for delay, value in (('now', 0), ("+1", 60), ("+30", 1800)):
-            cfg['power_state']['delay'] = delay
+        alpine = cls("alpine", {}, paths)
+        cfg = {"power_state": {"mode": "poweroff", "delay": ""}}
+        for delay, value in (("now", 0), ("+1", 60), ("+30", 1800)):
+            cfg["power_state"]["delay"] = delay
             ret = psc.load_power_state(cfg, alpine)
-            self.assertEqual('-d', ret[0][1])
+            self.assertEqual("-d", ret[0][1])
             self.assertEqual(str(value), ret[0][2])
 
 
 class TestCheckCondition(t_help.TestCase):
     def cmd_with_exit(self, rc):
-        return([sys.executable, '-c', 'import sys; sys.exit(%s)' % rc])
+        return [sys.executable, "-c", "import sys; sys.exit(%s)" % rc]
 
     def test_true_is_true(self):
         self.assertEqual(psc.check_condition(True), True)
@@ -120,7 +118,8 @@ class TestCheckCondition(t_help.TestCase):
     def test_cmd_exit_nonzero_warns(self):
         mocklog = mock.Mock()
         self.assertEqual(
-            psc.check_condition(self.cmd_with_exit(2), mocklog), False)
+            psc.check_condition(self.cmd_with_exit(2), mocklog), False
+        )
         self.assertEqual(mocklog.warning.call_count, 1)
 
 
@@ -133,14 +132,14 @@ def check_lps_ret(psc_return, mode=None):
     timeout = psc_return[1]
     condition = psc_return[2]
 
-    if 'shutdown' not in psc_return[0][0]:
+    if "shutdown" not in psc_return[0][0]:
         errs.append("string 'shutdown' not in cmd")
 
     if condition is None:
         errs.append("condition was not returned")
 
     if mode is not None:
-        opt = {'halt': '-H', 'poweroff': '-P', 'reboot': '-r'}[mode]
+        opt = {"halt": "-H", "poweroff": "-P", "reboot": "-r"}[mode]
         if opt not in psc_return[0]:
             errs.append("opt '%s' not in cmd: %s" % (opt, cmd))
 
@@ -154,6 +153,7 @@ def check_lps_ret(psc_return, mode=None):
 
     if len(errs):
         lines = ["Errors in result: %s" % str(psc_return)] + errs
-        raise Exception('\n'.join(lines))
+        raise Exception("\n".join(lines))
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_puppet.py b/tests/unittests/config/test_cc_puppet.py
index 1f67dc4c..2c4481da 100644
--- a/tests/unittests/config/test_cc_puppet.py
+++ b/tests/unittests/config/test_cc_puppet.py
@@ -2,58 +2,71 @@
 import logging
 import textwrap
 
-from cloudinit.config import cc_puppet
 from cloudinit import util
+from cloudinit.config import cc_puppet
 from tests.unittests.helpers import CiTestCase, HttprettyTestCase, mock
-
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
 
 
-@mock.patch('cloudinit.config.cc_puppet.subp.subp')
-@mock.patch('cloudinit.config.cc_puppet.os')
+@mock.patch("cloudinit.config.cc_puppet.subp.subp")
+@mock.patch("cloudinit.config.cc_puppet.os")
 class TestAutostartPuppet(CiTestCase):
-
     def test_wb_autostart_puppet_updates_puppet_default(self, m_os, m_subp):
         """Update /etc/default/puppet to autostart if it exists."""
 
         def _fake_exists(path):
-            return path == '/etc/default/puppet'
+            return path == "/etc/default/puppet"
 
         m_os.path.exists.side_effect = _fake_exists
         cc_puppet._autostart_puppet(LOG)
         self.assertEqual(
-            [mock.call(['sed', '-i', '-e', 's/^START=.*/START=yes/',
-                        '/etc/default/puppet'], capture=False)],
-            m_subp.call_args_list)
+            [
+                mock.call(
+                    [
+                        "sed",
+                        "-i",
+                        "-e",
+                        "s/^START=.*/START=yes/",
+                        "/etc/default/puppet",
+                    ],
+                    capture=False,
+                )
+            ],
+            m_subp.call_args_list,
+        )
 
     def test_wb_autostart_pupppet_enables_puppet_systemctl(self, m_os, m_subp):
         """If systemctl is present, enable puppet via systemctl."""
 
         def _fake_exists(path):
-            return path == '/bin/systemctl'
+            return path == "/bin/systemctl"
 
         m_os.path.exists.side_effect = _fake_exists
         cc_puppet._autostart_puppet(LOG)
-        expected_calls = [mock.call(
-            ['/bin/systemctl', 'enable', 'puppet.service'], capture=False)]
+        expected_calls = [
+            mock.call(
+                ["/bin/systemctl", "enable", "puppet.service"], capture=False
+            )
+        ]
         self.assertEqual(expected_calls, m_subp.call_args_list)
 
     def test_wb_autostart_pupppet_enables_puppet_chkconfig(self, m_os, m_subp):
         """If chkconfig is present, enable puppet via checkcfg."""
 
         def _fake_exists(path):
-            return path == '/sbin/chkconfig'
+            return path == "/sbin/chkconfig"
 
         m_os.path.exists.side_effect = _fake_exists
         cc_puppet._autostart_puppet(LOG)
-        expected_calls = [mock.call(
-            ['/sbin/chkconfig', 'puppet', 'on'], capture=False)]
+        expected_calls = [
+            mock.call(["/sbin/chkconfig", "puppet", "on"], capture=False)
+        ]
         self.assertEqual(expected_calls, m_subp.call_args_list)
 
 
-@mock.patch('cloudinit.config.cc_puppet._autostart_puppet')
+@mock.patch("cloudinit.config.cc_puppet._autostart_puppet")
 class TestPuppetHandle(CiTestCase):
 
     with_logs = True
@@ -61,145 +74,164 @@ class TestPuppetHandle(CiTestCase):
     def setUp(self):
         super(TestPuppetHandle, self).setUp()
         self.new_root = self.tmp_dir()
-        self.conf = self.tmp_path('puppet.conf')
-        self.csr_attributes_path = self.tmp_path(
-            'csr_attributes.yaml')
+        self.conf = self.tmp_path("puppet.conf")
+        self.csr_attributes_path = self.tmp_path("csr_attributes.yaml")
         self.cloud = get_cloud()
 
     def test_skips_missing_puppet_key_in_cloudconfig(self, m_auto):
         """Cloud-config containing no 'puppet' key is skipped."""
 
         cfg = {}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
-        self.assertIn(
-            "no 'puppet' configuration found", self.logs.getvalue())
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
+        self.assertIn("no 'puppet' configuration found", self.logs.getvalue())
         self.assertEqual(0, m_auto.call_count)
 
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_puppet_config_starts_puppet_service(self, m_subp, m_auto):
         """Cloud-config 'puppet' configuration starts puppet."""
 
-        cfg = {'puppet': {'install': False}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {"puppet": {"install": False}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(1, m_auto.call_count)
         self.assertIn(
-            [mock.call(['service', 'puppet', 'start'], capture=False)],
-            m_subp.call_args_list)
+            [mock.call(["service", "puppet", "start"], capture=False)],
+            m_subp.call_args_list,
+        )
 
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_empty_puppet_config_installs_puppet(self, m_subp, m_auto):
         """Cloud-config empty 'puppet' configuration installs latest puppet."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet': {}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {"puppet": {}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(
-            [mock.call(('puppet', None))],
-            self.cloud.distro.install_packages.call_args_list)
+            [mock.call(("puppet", None))],
+            self.cloud.distro.install_packages.call_args_list,
+        )
 
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_puppet_config_installs_puppet_on_true(self, m_subp, _):
         """Cloud-config with 'puppet' key installs when 'install' is True."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet': {'install': True}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {"puppet": {"install": True}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(
-            [mock.call(('puppet', None))],
-            self.cloud.distro.install_packages.call_args_list)
+            [mock.call(("puppet", None))],
+            self.cloud.distro.install_packages.call_args_list,
+        )
 
-    @mock.patch('cloudinit.config.cc_puppet.install_puppet_aio', autospec=True)
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.install_puppet_aio", autospec=True)
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_puppet_config_installs_puppet_aio(self, m_subp, m_aio, _):
         """Cloud-config with 'puppet' key installs
         when 'install_type' is 'aio'."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet': {'install': True, 'install_type': 'aio'}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
-        m_aio.assert_called_with(
-            cc_puppet.AIO_INSTALL_URL,
-            None, None, True)
-
-    @mock.patch('cloudinit.config.cc_puppet.install_puppet_aio', autospec=True)
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
-    def test_puppet_config_installs_puppet_aio_with_version(self,
-                                                            m_subp, m_aio, _):
+        cfg = {"puppet": {"install": True, "install_type": "aio"}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
+        m_aio.assert_called_with(cc_puppet.AIO_INSTALL_URL, None, None, True)
+
+    @mock.patch("cloudinit.config.cc_puppet.install_puppet_aio", autospec=True)
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
+    def test_puppet_config_installs_puppet_aio_with_version(
+        self, m_subp, m_aio, _
+    ):
         """Cloud-config with 'puppet' key installs
         when 'install_type' is 'aio' and 'version' is specified."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet': {'install': True,
-                          'version': '6.24.0', 'install_type': 'aio'}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {
+            "puppet": {
+                "install": True,
+                "version": "6.24.0",
+                "install_type": "aio",
+            }
+        }
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         m_aio.assert_called_with(
-            cc_puppet.AIO_INSTALL_URL,
-            '6.24.0', None, True)
-
-    @mock.patch('cloudinit.config.cc_puppet.install_puppet_aio', autospec=True)
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
-    def test_puppet_config_installs_puppet_aio_with_collection(self,
-                                                               m_subp,
-                                                               m_aio, _):
+            cc_puppet.AIO_INSTALL_URL, "6.24.0", None, True
+        )
+
+    @mock.patch("cloudinit.config.cc_puppet.install_puppet_aio", autospec=True)
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
+    def test_puppet_config_installs_puppet_aio_with_collection(
+        self, m_subp, m_aio, _
+    ):
         """Cloud-config with 'puppet' key installs
         when 'install_type' is 'aio' and 'collection' is specified."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet': {'install': True,
-                          'collection': 'puppet6', 'install_type': 'aio'}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {
+            "puppet": {
+                "install": True,
+                "collection": "puppet6",
+                "install_type": "aio",
+            }
+        }
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         m_aio.assert_called_with(
-            cc_puppet.AIO_INSTALL_URL,
-            None, 'puppet6', True)
-
-    @mock.patch('cloudinit.config.cc_puppet.install_puppet_aio', autospec=True)
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
-    def test_puppet_config_installs_puppet_aio_with_custom_url(self,
-                                                               m_subp,
-                                                               m_aio, _):
+            cc_puppet.AIO_INSTALL_URL, None, "puppet6", True
+        )
+
+    @mock.patch("cloudinit.config.cc_puppet.install_puppet_aio", autospec=True)
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
+    def test_puppet_config_installs_puppet_aio_with_custom_url(
+        self, m_subp, m_aio, _
+    ):
         """Cloud-config with 'puppet' key installs
         when 'install_type' is 'aio' and 'aio_install_url' is specified."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet':
-               {'install': True,
-                'aio_install_url': 'http://test.url/path/to/script.sh',
-                'install_type': 'aio'}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {
+            "puppet": {
+                "install": True,
+                "aio_install_url": "http://test.url/path/to/script.sh",
+                "install_type": "aio",
+            }
+        }
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         m_aio.assert_called_with(
-            'http://test.url/path/to/script.sh', None, None, True)
-
-    @mock.patch('cloudinit.config.cc_puppet.install_puppet_aio', autospec=True)
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
-    def test_puppet_config_installs_puppet_aio_without_cleanup(self,
-                                                               m_subp,
-                                                               m_aio, _):
+            "http://test.url/path/to/script.sh", None, None, True
+        )
+
+    @mock.patch("cloudinit.config.cc_puppet.install_puppet_aio", autospec=True)
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
+    def test_puppet_config_installs_puppet_aio_without_cleanup(
+        self, m_subp, m_aio, _
+    ):
         """Cloud-config with 'puppet' key installs
         when 'install_type' is 'aio' and no cleanup."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet': {'install': True,
-                          'cleanup': False, 'install_type': 'aio'}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
-        m_aio.assert_called_with(
-            cc_puppet.AIO_INSTALL_URL,
-            None, None, False)
+        cfg = {
+            "puppet": {
+                "install": True,
+                "cleanup": False,
+                "install_type": "aio",
+            }
+        }
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
+        m_aio.assert_called_with(cc_puppet.AIO_INSTALL_URL, None, None, False)
 
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_puppet_config_installs_puppet_version(self, m_subp, _):
         """Cloud-config 'puppet' configuration can specify a version."""
 
         self.cloud.distro = mock.MagicMock()
-        cfg = {'puppet': {'version': '3.8'}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {"puppet": {"version": "3.8"}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(
-            [mock.call(('puppet', '3.8'))],
-            self.cloud.distro.install_packages.call_args_list)
-
-    @mock.patch('cloudinit.config.cc_puppet.get_config_value')
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
-    def test_puppet_config_updates_puppet_conf(self,
-                                               m_subp, m_default, m_auto):
+            [mock.call(("puppet", "3.8"))],
+            self.cloud.distro.install_packages.call_args_list,
+        )
+
+    @mock.patch("cloudinit.config.cc_puppet.get_config_value")
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
+    def test_puppet_config_updates_puppet_conf(
+        self, m_subp, m_default, m_auto
+    ):
         """When 'conf' is provided update values in PUPPET_CONF_PATH."""
 
         def _fake_get_config_value(puppet_bin, setting):
@@ -208,22 +240,24 @@ class TestPuppetHandle(CiTestCase):
         m_default.side_effect = _fake_get_config_value
 
         cfg = {
-            'puppet': {
-                'conf': {'agent': {'server': 'puppetserver.example.org'}}}}
-        util.write_file(
-            self.conf, '[agent]\nserver = origpuppet\nother = 3')
+            "puppet": {
+                "conf": {"agent": {"server": "puppetserver.example.org"}}
+            }
+        }
+        util.write_file(self.conf, "[agent]\nserver = origpuppet\nother = 3")
         self.cloud.distro = mock.MagicMock()
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         content = util.load_file(self.conf)
-        expected = '[agent]\nserver = puppetserver.example.org\nother = 3\n\n'
+        expected = "[agent]\nserver = puppetserver.example.org\nother = 3\n\n"
         self.assertEqual(expected, content)
 
-    @mock.patch('cloudinit.config.cc_puppet.get_config_value')
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp')
-    def test_puppet_writes_csr_attributes_file(self,
-                                               m_subp, m_default, m_auto):
+    @mock.patch("cloudinit.config.cc_puppet.get_config_value")
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp")
+    def test_puppet_writes_csr_attributes_file(
+        self, m_subp, m_default, m_auto
+    ):
         """When csr_attributes is provided
-            creates file in PUPPET_CSR_ATTRIBUTES_PATH."""
+        creates file in PUPPET_CSR_ATTRIBUTES_PATH."""
 
         def _fake_get_config_value(puppet_bin, setting):
             return self.csr_attributes_path
@@ -232,105 +266,131 @@ class TestPuppetHandle(CiTestCase):
 
         self.cloud.distro = mock.MagicMock()
         cfg = {
-            'puppet': {
-                'csr_attributes': {
-                    'custom_attributes': {
-                        '1.2.840.113549.1.9.7':
-                            '342thbjkt82094y0uthhor289jnqthpc2290'
+            "puppet": {
+                "csr_attributes": {
+                    "custom_attributes": {
+                        "1.2.840.113549.1.9.7": (
+                            "342thbjkt82094y0uthhor289jnqthpc2290"
+                        )
+                    },
+                    "extension_requests": {
+                        "pp_uuid": "ED803750-E3C7-44F5-BB08-41A04433FE2E",
+                        "pp_image_name": "my_ami_image",
+                        "pp_preshared_key": (
+                            "342thbjkt82094y0uthhor289jnqthpc2290"
+                        ),
                     },
-                    'extension_requests': {
-                        'pp_uuid': 'ED803750-E3C7-44F5-BB08-41A04433FE2E',
-                        'pp_image_name': 'my_ami_image',
-                        'pp_preshared_key':
-                            '342thbjkt82094y0uthhor289jnqthpc2290'
-                    }
                 }
             }
         }
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         content = util.load_file(self.csr_attributes_path)
-        expected = textwrap.dedent("""\
+        expected = textwrap.dedent(
+            """\
             custom_attributes:
               1.2.840.113549.1.9.7: 342thbjkt82094y0uthhor289jnqthpc2290
             extension_requests:
               pp_image_name: my_ami_image
               pp_preshared_key: 342thbjkt82094y0uthhor289jnqthpc2290
               pp_uuid: ED803750-E3C7-44F5-BB08-41A04433FE2E
-            """)
+            """
+        )
         self.assertEqual(expected, content)
 
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_puppet_runs_puppet_if_requested(self, m_subp, m_auto):
         """Run puppet with default args if 'exec' is set to True."""
 
-        cfg = {'puppet': {'exec': True}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {"puppet": {"exec": True}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(1, m_auto.call_count)
         self.assertIn(
-            [mock.call(['puppet', 'agent', '--test'], capture=False)],
-            m_subp.call_args_list)
+            [mock.call(["puppet", "agent", "--test"], capture=False)],
+            m_subp.call_args_list,
+        )
 
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_puppet_starts_puppetd(self, m_subp, m_auto):
         """Run puppet with default args if 'exec' is set to True."""
 
-        cfg = {'puppet': {}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {"puppet": {}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(1, m_auto.call_count)
         self.assertIn(
-            [mock.call(['service', 'puppet', 'start'], capture=False)],
-            m_subp.call_args_list)
+            [mock.call(["service", "puppet", "start"], capture=False)],
+            m_subp.call_args_list,
+        )
 
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
     def test_puppet_skips_puppetd(self, m_subp, m_auto):
         """Run puppet with default args if 'exec' is set to True."""
 
-        cfg = {'puppet': {'start_service': False}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {"puppet": {"start_service": False}}
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(0, m_auto.call_count)
         self.assertNotIn(
-            [mock.call(['service', 'puppet', 'start'], capture=False)],
-            m_subp.call_args_list)
-
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
-    def test_puppet_runs_puppet_with_args_list_if_requested(self,
-                                                            m_subp, m_auto):
+            [mock.call(["service", "puppet", "start"], capture=False)],
+            m_subp.call_args_list,
+        )
+
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
+    def test_puppet_runs_puppet_with_args_list_if_requested(
+        self, m_subp, m_auto
+    ):
         """Run puppet with 'exec_args' list if 'exec' is set to True."""
 
-        cfg = {'puppet': {'exec': True, 'exec_args': [
-            '--onetime', '--detailed-exitcodes']}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {
+            "puppet": {
+                "exec": True,
+                "exec_args": ["--onetime", "--detailed-exitcodes"],
+            }
+        }
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(1, m_auto.call_count)
         self.assertIn(
-            [mock.call(
-                ['puppet', 'agent', '--onetime', '--detailed-exitcodes'],
-                capture=False)],
-            m_subp.call_args_list)
-
-    @mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=("", ""))
-    def test_puppet_runs_puppet_with_args_string_if_requested(self,
-                                                              m_subp, m_auto):
+            [
+                mock.call(
+                    ["puppet", "agent", "--onetime", "--detailed-exitcodes"],
+                    capture=False,
+                )
+            ],
+            m_subp.call_args_list,
+        )
+
+    @mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=("", ""))
+    def test_puppet_runs_puppet_with_args_string_if_requested(
+        self, m_subp, m_auto
+    ):
         """Run puppet with 'exec_args' string if 'exec' is set to True."""
 
-        cfg = {'puppet': {'exec': True,
-                          'exec_args': '--onetime --detailed-exitcodes'}}
-        cc_puppet.handle('notimportant', cfg, self.cloud, LOG, None)
+        cfg = {
+            "puppet": {
+                "exec": True,
+                "exec_args": "--onetime --detailed-exitcodes",
+            }
+        }
+        cc_puppet.handle("notimportant", cfg, self.cloud, LOG, None)
         self.assertEqual(1, m_auto.call_count)
         self.assertIn(
-            [mock.call(
-                ['puppet', 'agent', '--onetime', '--detailed-exitcodes'],
-                capture=False)],
-            m_subp.call_args_list)
+            [
+                mock.call(
+                    ["puppet", "agent", "--onetime", "--detailed-exitcodes"],
+                    capture=False,
+                )
+            ],
+            m_subp.call_args_list,
+        )
 
 
 URL_MOCK = mock.Mock()
 URL_MOCK.contents = b'#!/bin/bash\necho "Hi Mom"'
 
 
-@mock.patch('cloudinit.config.cc_puppet.subp.subp', return_value=(None, None))
+@mock.patch("cloudinit.config.cc_puppet.subp.subp", return_value=(None, None))
 @mock.patch(
-    'cloudinit.config.cc_puppet.url_helper.readurl',
-    return_value=URL_MOCK, autospec=True,
+    "cloudinit.config.cc_puppet.url_helper.readurl",
+    return_value=URL_MOCK,
+    autospec=True,
 )
 class TestInstallPuppetAio(HttprettyTestCase):
     def test_install_with_default_arguments(self, m_readurl, m_subp):
@@ -338,43 +398,53 @@ class TestInstallPuppetAio(HttprettyTestCase):
         cc_puppet.install_puppet_aio()
 
         self.assertEqual(
-            [mock.call([mock.ANY, '--cleanup'], capture=False)],
-            m_subp.call_args_list)
+            [mock.call([mock.ANY, "--cleanup"], capture=False)],
+            m_subp.call_args_list,
+        )
 
     def test_install_with_custom_url(self, m_readurl, m_subp):
         """Install AIO from custom URL"""
-        cc_puppet.install_puppet_aio('http://custom.url/path/to/script.sh')
+        cc_puppet.install_puppet_aio("http://custom.url/path/to/script.sh")
         m_readurl.assert_called_with(
-            url='http://custom.url/path/to/script.sh',
-            retries=5)
+            url="http://custom.url/path/to/script.sh", retries=5
+        )
 
         self.assertEqual(
-            [mock.call([mock.ANY, '--cleanup'], capture=False)],
-            m_subp.call_args_list)
+            [mock.call([mock.ANY, "--cleanup"], capture=False)],
+            m_subp.call_args_list,
+        )
 
     def test_install_with_version(self, m_readurl, m_subp):
         """Install AIO with specific version"""
-        cc_puppet.install_puppet_aio(cc_puppet.AIO_INSTALL_URL, '7.6.0')
+        cc_puppet.install_puppet_aio(cc_puppet.AIO_INSTALL_URL, "7.6.0")
 
         self.assertEqual(
-            [mock.call([mock.ANY, '-v', '7.6.0', '--cleanup'], capture=False)],
-            m_subp.call_args_list)
+            [mock.call([mock.ANY, "-v", "7.6.0", "--cleanup"], capture=False)],
+            m_subp.call_args_list,
+        )
 
     def test_install_with_collection(self, m_readurl, m_subp):
         """Install AIO with specific collection"""
         cc_puppet.install_puppet_aio(
-            cc_puppet.AIO_INSTALL_URL, None, 'puppet6-nightly')
+            cc_puppet.AIO_INSTALL_URL, None, "puppet6-nightly"
+        )
 
         self.assertEqual(
-            [mock.call([mock.ANY, '-c', 'puppet6-nightly', '--cleanup'],
-                       capture=False)],
-            m_subp.call_args_list)
+            [
+                mock.call(
+                    [mock.ANY, "-c", "puppet6-nightly", "--cleanup"],
+                    capture=False,
+                )
+            ],
+            m_subp.call_args_list,
+        )
 
     def test_install_with_no_cleanup(self, m_readurl, m_subp):
         """Install AIO with no cleanup"""
         cc_puppet.install_puppet_aio(
-            cc_puppet.AIO_INSTALL_URL, None, None, False)
+            cc_puppet.AIO_INSTALL_URL, None, None, False
+        )
 
         self.assertEqual(
-            [mock.call([mock.ANY], capture=False)],
-            m_subp.call_args_list)
+            [mock.call([mock.ANY], capture=False)], m_subp.call_args_list
+        )
diff --git a/tests/unittests/config/test_cc_refresh_rmc_and_interface.py b/tests/unittests/config/test_cc_refresh_rmc_and_interface.py
index 522de23d..e038f814 100644
--- a/tests/unittests/config/test_cc_refresh_rmc_and_interface.py
+++ b/tests/unittests/config/test_cc_refresh_rmc_and_interface.py
@@ -1,51 +1,83 @@
-from cloudinit.config import cc_refresh_rmc_and_interface as ccrmci
+import logging
+from textwrap import dedent
 
 from cloudinit import util
-
+from cloudinit.config import cc_refresh_rmc_and_interface as ccrmci
 from tests.unittests import helpers as t_help
 from tests.unittests.helpers import mock
 
-from textwrap import dedent
-import logging
-
 LOG = logging.getLogger(__name__)
 MPATH = "cloudinit.config.cc_refresh_rmc_and_interface"
 NET_INFO = {
-    'lo': {'ipv4': [{'ip': '127.0.0.1',
-                    'bcast': '', 'mask': '255.0.0.0',
-                                 'scope': 'host'}],
-           'ipv6': [{'ip': '::1/128',
-                     'scope6': 'host'}], 'hwaddr': '',
-           'up': 'True'},
-    'env2': {'ipv4': [{'ip': '8.0.0.19',
-                       'bcast': '8.0.0.255', 'mask': '255.255.255.0',
-                                             'scope': 'global'}],
-             'ipv6': [{'ip': 'fe80::f896:c2ff:fe81:8220/64',
-                       'scope6': 'link'}], 'hwaddr': 'fa:96:c2:81:82:20',
-             'up': 'True'},
-    'env3': {'ipv4': [{'ip': '90.0.0.14',
-                       'bcast': '90.0.0.255', 'mask': '255.255.255.0',
-                                              'scope': 'global'}],
-             'ipv6': [{'ip': 'fe80::f896:c2ff:fe81:8221/64',
-                       'scope6': 'link'}], 'hwaddr': 'fa:96:c2:81:82:21',
-             'up': 'True'},
-    'env4': {'ipv4': [{'ip': '9.114.23.7',
-                       'bcast': '9.114.23.255', 'mask': '255.255.255.0',
-                                                'scope': 'global'}],
-             'ipv6': [{'ip': 'fe80::f896:c2ff:fe81:8222/64',
-                       'scope6': 'link'}], 'hwaddr': 'fa:96:c2:81:82:22',
-             'up': 'True'},
-    'env5': {'ipv4': [],
-             'ipv6': [{'ip': 'fe80::9c26:c3ff:fea4:62c8/64',
-                       'scope6': 'link'}], 'hwaddr': '42:20:86:df:fa:4c',
-             'up': 'True'}}
+    "lo": {
+        "ipv4": [
+            {
+                "ip": "127.0.0.1",
+                "bcast": "",
+                "mask": "255.0.0.0",
+                "scope": "host",
+            }
+        ],
+        "ipv6": [{"ip": "::1/128", "scope6": "host"}],
+        "hwaddr": "",
+        "up": "True",
+    },
+    "env2": {
+        "ipv4": [
+            {
+                "ip": "8.0.0.19",
+                "bcast": "8.0.0.255",
+                "mask": "255.255.255.0",
+                "scope": "global",
+            }
+        ],
+        "ipv6": [{"ip": "fe80::f896:c2ff:fe81:8220/64", "scope6": "link"}],
+        "hwaddr": "fa:96:c2:81:82:20",
+        "up": "True",
+    },
+    "env3": {
+        "ipv4": [
+            {
+                "ip": "90.0.0.14",
+                "bcast": "90.0.0.255",
+                "mask": "255.255.255.0",
+                "scope": "global",
+            }
+        ],
+        "ipv6": [{"ip": "fe80::f896:c2ff:fe81:8221/64", "scope6": "link"}],
+        "hwaddr": "fa:96:c2:81:82:21",
+        "up": "True",
+    },
+    "env4": {
+        "ipv4": [
+            {
+                "ip": "9.114.23.7",
+                "bcast": "9.114.23.255",
+                "mask": "255.255.255.0",
+                "scope": "global",
+            }
+        ],
+        "ipv6": [{"ip": "fe80::f896:c2ff:fe81:8222/64", "scope6": "link"}],
+        "hwaddr": "fa:96:c2:81:82:22",
+        "up": "True",
+    },
+    "env5": {
+        "ipv4": [],
+        "ipv6": [{"ip": "fe80::9c26:c3ff:fea4:62c8/64", "scope6": "link"}],
+        "hwaddr": "42:20:86:df:fa:4c",
+        "up": "True",
+    },
+}
 
 
 class TestRsctNodeFile(t_help.CiTestCase):
     def test_disable_ipv6_interface(self):
         """test parsing of iface files."""
         fname = self.tmp_path("iface-eth5")
-        util.write_file(fname, dedent("""\
+        util.write_file(
+            fname,
+            dedent(
+                """\
             BOOTPROTO=static
             DEVICE=eth5
             HWADDR=42:20:86:df:fa:4c
@@ -57,10 +89,14 @@ class TestRsctNodeFile(t_help.CiTestCase):
             STARTMODE=auto
             TYPE=Ethernet
             USERCTL=no
-            """))
+            """
+            ),
+        )
 
         ccrmci.disable_ipv6(fname)
-        self.assertEqual(dedent("""\
+        self.assertEqual(
+            dedent(
+                """\
             BOOTPROTO=static
             DEVICE=eth5
             HWADDR=42:20:86:df:fa:4c
@@ -69,41 +105,53 @@ class TestRsctNodeFile(t_help.CiTestCase):
             TYPE=Ethernet
             USERCTL=no
             NM_CONTROLLED=no
-            """), util.load_file(fname))
+            """
+            ),
+            util.load_file(fname),
+        )
 
-    @mock.patch(MPATH + '.refresh_rmc')
-    @mock.patch(MPATH + '.restart_network_manager')
-    @mock.patch(MPATH + '.disable_ipv6')
-    @mock.patch(MPATH + '.refresh_ipv6')
-    @mock.patch(MPATH + '.netinfo.netdev_info')
-    @mock.patch(MPATH + '.subp.which')
-    def test_handle(self, m_refresh_rmc,
-                    m_netdev_info, m_refresh_ipv6, m_disable_ipv6,
-                    m_restart_nm, m_which):
+    @mock.patch(MPATH + ".refresh_rmc")
+    @mock.patch(MPATH + ".restart_network_manager")
+    @mock.patch(MPATH + ".disable_ipv6")
+    @mock.patch(MPATH + ".refresh_ipv6")
+    @mock.patch(MPATH + ".netinfo.netdev_info")
+    @mock.patch(MPATH + ".subp.which")
+    def test_handle(
+        self,
+        m_refresh_rmc,
+        m_netdev_info,
+        m_refresh_ipv6,
+        m_disable_ipv6,
+        m_restart_nm,
+        m_which,
+    ):
         """Basic test of handle."""
         m_netdev_info.return_value = NET_INFO
-        m_which.return_value = '/opt/rsct/bin/rmcctrl'
-        ccrmci.handle(
-            "refresh_rmc_and_interface", None, None, None, None)
+        m_which.return_value = "/opt/rsct/bin/rmcctrl"
+        ccrmci.handle("refresh_rmc_and_interface", None, None, None, None)
         self.assertEqual(1, m_netdev_info.call_count)
-        m_refresh_ipv6.assert_called_with('env5')
+        m_refresh_ipv6.assert_called_with("env5")
         m_disable_ipv6.assert_called_with(
-            '/etc/sysconfig/network-scripts/ifcfg-env5')
+            "/etc/sysconfig/network-scripts/ifcfg-env5"
+        )
         self.assertEqual(1, m_restart_nm.call_count)
         self.assertEqual(1, m_refresh_rmc.call_count)
 
-    @mock.patch(MPATH + '.netinfo.netdev_info')
+    @mock.patch(MPATH + ".netinfo.netdev_info")
     def test_find_ipv6(self, m_netdev_info):
         """find_ipv6_ifaces parses netdev_info returning those with ipv6"""
         m_netdev_info.return_value = NET_INFO
         found = ccrmci.find_ipv6_ifaces()
-        self.assertEqual(['env5'], found)
+        self.assertEqual(["env5"], found)
 
-    @mock.patch(MPATH + '.subp.subp')
+    @mock.patch(MPATH + ".subp.subp")
     def test_refresh_ipv6(self, m_subp):
         """refresh_ipv6 should ip down and up the interface."""
         iface = "myeth0"
         ccrmci.refresh_ipv6(iface)
-        m_subp.assert_has_calls([
-            mock.call(['ip', 'link', 'set', iface, 'down']),
-            mock.call(['ip', 'link', 'set', iface, 'up'])])
+        m_subp.assert_has_calls(
+            [
+                mock.call(["ip", "link", "set", iface, "down"]),
+                mock.call(["ip", "link", "set", iface, "up"]),
+            ]
+        )
diff --git a/tests/unittests/config/test_cc_resizefs.py b/tests/unittests/config/test_cc_resizefs.py
index 1f9e24da..228f1e45 100644
--- a/tests/unittests/config/test_cc_resizefs.py
+++ b/tests/unittests/config/test_cc_resizefs.py
@@ -1,16 +1,26 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.config.cc_resizefs import (
-    can_skip_resize, handle, maybe_get_writable_device_path, _resize_btrfs,
-    _resize_zfs, _resize_xfs, _resize_ext, _resize_ufs)
-
-from collections import namedtuple
 import logging
+from collections import namedtuple
 
+from cloudinit.config.cc_resizefs import (
+    _resize_btrfs,
+    _resize_ext,
+    _resize_ufs,
+    _resize_xfs,
+    _resize_zfs,
+    can_skip_resize,
+    handle,
+    maybe_get_writable_device_path,
+)
 from cloudinit.subp import ProcessExecutionError
 from tests.unittests.helpers import (
-    CiTestCase, mock, skipUnlessJsonSchema, util, wrap_and_call)
-
+    CiTestCase,
+    mock,
+    skipUnlessJsonSchema,
+    util,
+    wrap_and_call,
+)
 
 LOG = logging.getLogger(__name__)
 
@@ -22,32 +32,34 @@ class TestResizefs(CiTestCase):
         super(TestResizefs, self).setUp()
         self.name = "resizefs"
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_skip_ufs_resize(self, m_subp):
         fs_type = "ufs"
         resize_what = "/"
         devpth = "/dev/da0p2"
-        err = ("growfs: requested size 2.0GB is not larger than the "
-               "current filesystem size 2.0GB\n")
+        err = (
+            "growfs: requested size 2.0GB is not larger than the "
+            "current filesystem size 2.0GB\n"
+        )
         exception = ProcessExecutionError(stderr=err, exit_code=1)
         m_subp.side_effect = exception
         res = can_skip_resize(fs_type, resize_what, devpth)
         self.assertTrue(res)
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_cannot_skip_ufs_resize(self, m_subp):
         fs_type = "ufs"
         resize_what = "/"
         devpth = "/dev/da0p2"
         m_subp.return_value = (
-            ("stdout: super-block backups (for fsck_ffs -b #) at:\n\n"),
-            ("growfs: no room to allocate last cylinder group; "
-             "leaving 364KB unused\n")
+            "stdout: super-block backups (for fsck_ffs -b #) at:\n\n",
+            "growfs: no room to allocate last cylinder group; "
+            "leaving 364KB unused\n",
         )
         res = can_skip_resize(fs_type, resize_what, devpth)
         self.assertFalse(res)
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_cannot_skip_ufs_growfs_exception(self, m_subp):
         fs_type = "ufs"
         resize_what = "/"
@@ -59,15 +71,16 @@ class TestResizefs(CiTestCase):
             can_skip_resize(fs_type, resize_what, devpth)
 
     def test_can_skip_resize_ext(self):
-        self.assertFalse(can_skip_resize('ext', '/', '/dev/sda1'))
+        self.assertFalse(can_skip_resize("ext", "/", "/dev/sda1"))
 
     def test_handle_noops_on_disabled(self):
         """The handle function logs when the configuration disables resize."""
-        cfg = {'resize_rootfs': False}
-        handle('cc_resizefs', cfg, _cloud=None, log=LOG, args=[])
+        cfg = {"resize_rootfs": False}
+        handle("cc_resizefs", cfg, _cloud=None, log=LOG, args=[])
         self.assertIn(
-            'DEBUG: Skipping module named cc_resizefs, resizing disabled\n',
-            self.logs.getvalue())
+            "DEBUG: Skipping module named cc_resizefs, resizing disabled\n",
+            self.logs.getvalue(),
+        )
 
     @skipUnlessJsonSchema()
     def test_handle_schema_validation_logs_invalid_resize_rootfs_value(self):
@@ -75,164 +88,189 @@ class TestResizefs(CiTestCase):
 
         Invalid values for resize_rootfs result in disabling the module.
         """
-        cfg = {'resize_rootfs': 'junk'}
-        handle('cc_resizefs', cfg, _cloud=None, log=LOG, args=[])
+        cfg = {"resize_rootfs": "junk"}
+        handle("cc_resizefs", cfg, _cloud=None, log=LOG, args=[])
         logs = self.logs.getvalue()
         self.assertIn(
             "WARNING: Invalid config:\nresize_rootfs: 'junk' is not one of"
             " [True, False, 'noblock']",
-            logs)
+            logs,
+        )
         self.assertIn(
-            'DEBUG: Skipping module named cc_resizefs, resizing disabled\n',
-            logs)
+            "DEBUG: Skipping module named cc_resizefs, resizing disabled\n",
+            logs,
+        )
 
-    @mock.patch('cloudinit.config.cc_resizefs.util.get_mount_info')
+    @mock.patch("cloudinit.config.cc_resizefs.util.get_mount_info")
     def test_handle_warns_on_unknown_mount_info(self, m_get_mount_info):
         """handle warns when get_mount_info sees unknown filesystem for /."""
         m_get_mount_info.return_value = None
-        cfg = {'resize_rootfs': True}
-        handle('cc_resizefs', cfg, _cloud=None, log=LOG, args=[])
+        cfg = {"resize_rootfs": True}
+        handle("cc_resizefs", cfg, _cloud=None, log=LOG, args=[])
         logs = self.logs.getvalue()
         self.assertNotIn("WARNING: Invalid config:\nresize_rootfs:", logs)
         self.assertIn(
-            'WARNING: Could not determine filesystem type of /\n',
-            logs)
+            "WARNING: Could not determine filesystem type of /\n", logs
+        )
         self.assertEqual(
-            [mock.call('/', LOG)],
-            m_get_mount_info.call_args_list)
+            [mock.call("/", LOG)], m_get_mount_info.call_args_list
+        )
 
     def test_handle_warns_on_undiscoverable_root_path_in_commandline(self):
         """handle noops when the root path is not found on the commandline."""
-        cfg = {'resize_rootfs': True}
-        exists_mock_path = 'cloudinit.config.cc_resizefs.os.path.exists'
+        cfg = {"resize_rootfs": True}
+        exists_mock_path = "cloudinit.config.cc_resizefs.os.path.exists"
 
         def fake_mount_info(path, log):
-            self.assertEqual('/', path)
+            self.assertEqual("/", path)
             self.assertEqual(LOG, log)
-            return ('/dev/root', 'ext4', '/')
+            return ("/dev/root", "ext4", "/")
 
         with mock.patch(exists_mock_path) as m_exists:
             m_exists.return_value = False
             wrap_and_call(
-                'cloudinit.config.cc_resizefs.util',
-                {'is_container': {'return_value': False},
-                 'get_mount_info': {'side_effect': fake_mount_info},
-                 'get_cmdline': {'return_value': 'BOOT_IMAGE=/vmlinuz.efi'}},
-                handle, 'cc_resizefs', cfg, _cloud=None, log=LOG,
-                args=[])
+                "cloudinit.config.cc_resizefs.util",
+                {
+                    "is_container": {"return_value": False},
+                    "get_mount_info": {"side_effect": fake_mount_info},
+                    "get_cmdline": {"return_value": "BOOT_IMAGE=/vmlinuz.efi"},
+                },
+                handle,
+                "cc_resizefs",
+                cfg,
+                _cloud=None,
+                log=LOG,
+                args=[],
+            )
         logs = self.logs.getvalue()
         self.assertIn("WARNING: Unable to find device '/dev/root'", logs)
 
     def test_resize_zfs_cmd_return(self):
-        zpool = 'zroot'
-        devpth = 'gpt/system'
-        self.assertEqual(('zpool', 'online', '-e', zpool, devpth),
-                         _resize_zfs(zpool, devpth))
+        zpool = "zroot"
+        devpth = "gpt/system"
+        self.assertEqual(
+            ("zpool", "online", "-e", zpool, devpth),
+            _resize_zfs(zpool, devpth),
+        )
 
     def test_resize_xfs_cmd_return(self):
-        mount_point = '/mnt/test'
-        devpth = '/dev/sda1'
-        self.assertEqual(('xfs_growfs', mount_point),
-                         _resize_xfs(mount_point, devpth))
+        mount_point = "/mnt/test"
+        devpth = "/dev/sda1"
+        self.assertEqual(
+            ("xfs_growfs", mount_point), _resize_xfs(mount_point, devpth)
+        )
 
     def test_resize_ext_cmd_return(self):
-        mount_point = '/'
-        devpth = '/dev/sdb1'
-        self.assertEqual(('resize2fs', devpth),
-                         _resize_ext(mount_point, devpth))
+        mount_point = "/"
+        devpth = "/dev/sdb1"
+        self.assertEqual(
+            ("resize2fs", devpth), _resize_ext(mount_point, devpth)
+        )
 
     def test_resize_ufs_cmd_return(self):
-        mount_point = '/'
-        devpth = '/dev/sda2'
-        self.assertEqual(('growfs', '-y', mount_point),
-                         _resize_ufs(mount_point, devpth))
-
-    @mock.patch('cloudinit.util.is_container', return_value=False)
-    @mock.patch('cloudinit.util.parse_mount')
-    @mock.patch('cloudinit.util.get_device_info_from_zpool')
-    @mock.patch('cloudinit.util.get_mount_info')
-    def test_handle_zfs_root(self, mount_info, zpool_info, parse_mount,
-                             is_container):
-        devpth = 'vmzroot/ROOT/freebsd'
-        disk = 'gpt/system'
-        fs_type = 'zfs'
-        mount_point = '/'
+        mount_point = "/"
+        devpth = "/dev/sda2"
+        self.assertEqual(
+            ("growfs", "-y", mount_point), _resize_ufs(mount_point, devpth)
+        )
+
+    @mock.patch("cloudinit.util.is_container", return_value=False)
+    @mock.patch("cloudinit.util.parse_mount")
+    @mock.patch("cloudinit.util.get_device_info_from_zpool")
+    @mock.patch("cloudinit.util.get_mount_info")
+    def test_handle_zfs_root(
+        self, mount_info, zpool_info, parse_mount, is_container
+    ):
+        devpth = "vmzroot/ROOT/freebsd"
+        disk = "gpt/system"
+        fs_type = "zfs"
+        mount_point = "/"
 
         mount_info.return_value = (devpth, fs_type, mount_point)
         zpool_info.return_value = disk
         parse_mount.return_value = (devpth, fs_type, mount_point)
 
-        cfg = {'resize_rootfs': True}
+        cfg = {"resize_rootfs": True}
 
-        with mock.patch('cloudinit.config.cc_resizefs.do_resize') as dresize:
-            handle('cc_resizefs', cfg, _cloud=None, log=LOG, args=[])
+        with mock.patch("cloudinit.config.cc_resizefs.do_resize") as dresize:
+            handle("cc_resizefs", cfg, _cloud=None, log=LOG, args=[])
             ret = dresize.call_args[0][0]
 
-        self.assertEqual(('zpool', 'online', '-e', 'vmzroot', disk), ret)
+        self.assertEqual(("zpool", "online", "-e", "vmzroot", disk), ret)
 
-    @mock.patch('cloudinit.util.is_container', return_value=False)
-    @mock.patch('cloudinit.util.get_mount_info')
-    @mock.patch('cloudinit.util.get_device_info_from_zpool')
-    @mock.patch('cloudinit.util.parse_mount')
-    def test_handle_modern_zfsroot(self, mount_info, zpool_info, parse_mount,
-                                   is_container):
-        devpth = 'zroot/ROOT/default'
-        disk = 'da0p3'
-        fs_type = 'zfs'
-        mount_point = '/'
+    @mock.patch("cloudinit.util.is_container", return_value=False)
+    @mock.patch("cloudinit.util.get_mount_info")
+    @mock.patch("cloudinit.util.get_device_info_from_zpool")
+    @mock.patch("cloudinit.util.parse_mount")
+    def test_handle_modern_zfsroot(
+        self, mount_info, zpool_info, parse_mount, is_container
+    ):
+        devpth = "zroot/ROOT/default"
+        disk = "da0p3"
+        fs_type = "zfs"
+        mount_point = "/"
 
         mount_info.return_value = (devpth, fs_type, mount_point)
         zpool_info.return_value = disk
         parse_mount.return_value = (devpth, fs_type, mount_point)
 
-        cfg = {'resize_rootfs': True}
+        cfg = {"resize_rootfs": True}
 
         def fake_stat(devpath):
             if devpath == disk:
                 raise OSError("not here")
             FakeStat = namedtuple(
-                'FakeStat', ['st_mode', 'st_size', 'st_mtime'])  # minimal stat
+                "FakeStat", ["st_mode", "st_size", "st_mtime"]
+            )  # minimal stat
             return FakeStat(25008, 0, 1)  # fake char block device
 
-        with mock.patch('cloudinit.config.cc_resizefs.do_resize') as dresize:
-            with mock.patch('cloudinit.config.cc_resizefs.os.stat') as m_stat:
+        with mock.patch("cloudinit.config.cc_resizefs.do_resize") as dresize:
+            with mock.patch("cloudinit.config.cc_resizefs.os.stat") as m_stat:
                 m_stat.side_effect = fake_stat
-                handle('cc_resizefs', cfg, _cloud=None, log=LOG, args=[])
+                handle("cc_resizefs", cfg, _cloud=None, log=LOG, args=[])
 
-        self.assertEqual(('zpool', 'online', '-e', 'zroot', '/dev/' + disk),
-                         dresize.call_args[0][0])
+        self.assertEqual(
+            ("zpool", "online", "-e", "zroot", "/dev/" + disk),
+            dresize.call_args[0][0],
+        )
 
 
 class TestRootDevFromCmdline(CiTestCase):
-
     def test_rootdev_from_cmdline_with_no_root(self):
         """Return None from rootdev_from_cmdline when root is not present."""
         invalid_cases = [
-            'BOOT_IMAGE=/adsf asdfa werasef  root adf', 'BOOT_IMAGE=/adsf', '']
+            "BOOT_IMAGE=/adsf asdfa werasef  root adf",
+            "BOOT_IMAGE=/adsf",
+            "",
+        ]
         for case in invalid_cases:
             self.assertIsNone(util.rootdev_from_cmdline(case))
 
     def test_rootdev_from_cmdline_with_root_startswith_dev(self):
         """Return the cmdline root when the path starts with /dev."""
         self.assertEqual(
-            '/dev/this', util.rootdev_from_cmdline('asdf root=/dev/this'))
+            "/dev/this", util.rootdev_from_cmdline("asdf root=/dev/this")
+        )
 
     def test_rootdev_from_cmdline_with_root_without_dev_prefix(self):
         """Add /dev prefix to cmdline root when the path lacks the prefix."""
         self.assertEqual(
-            '/dev/this', util.rootdev_from_cmdline('asdf root=this'))
+            "/dev/this", util.rootdev_from_cmdline("asdf root=this")
+        )
 
     def test_rootdev_from_cmdline_with_root_with_label(self):
         """When cmdline root contains a LABEL, our root is disk/by-label."""
         self.assertEqual(
-            '/dev/disk/by-label/unique',
-            util.rootdev_from_cmdline('asdf root=LABEL=unique'))
+            "/dev/disk/by-label/unique",
+            util.rootdev_from_cmdline("asdf root=LABEL=unique"),
+        )
 
     def test_rootdev_from_cmdline_with_root_with_uuid(self):
         """When cmdline root contains a UUID, our root is disk/by-uuid."""
         self.assertEqual(
-            '/dev/disk/by-uuid/adsfdsaf-adsf',
-            util.rootdev_from_cmdline('asdf root=UUID=adsfdsaf-adsf'))
+            "/dev/disk/by-uuid/adsfdsaf-adsf",
+            util.rootdev_from_cmdline("asdf root=UUID=adsfdsaf-adsf"),
+        )
 
 
 class TestMaybeGetDevicePathAsWritableBlock(CiTestCase):
@@ -241,158 +279,210 @@ class TestMaybeGetDevicePathAsWritableBlock(CiTestCase):
 
     def test_maybe_get_writable_device_path_none_on_overlayroot(self):
         """When devpath is overlayroot (on MAAS), is_dev_writable is False."""
-        info = 'does not matter'
+        info = "does not matter"
         devpath = wrap_and_call(
-            'cloudinit.config.cc_resizefs.util',
-            {'is_container': {'return_value': False}},
-            maybe_get_writable_device_path, 'overlayroot', info, LOG)
+            "cloudinit.config.cc_resizefs.util",
+            {"is_container": {"return_value": False}},
+            maybe_get_writable_device_path,
+            "overlayroot",
+            info,
+            LOG,
+        )
         self.assertIsNone(devpath)
         self.assertIn(
             "Not attempting to resize devpath 'overlayroot'",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
     def test_maybe_get_writable_device_path_warns_missing_cmdline_root(self):
         """When root does not exist isn't in the cmdline, log warning."""
-        info = 'does not matter'
+        info = "does not matter"
 
         def fake_mount_info(path, log):
-            self.assertEqual('/', path)
+            self.assertEqual("/", path)
             self.assertEqual(LOG, log)
-            return ('/dev/root', 'ext4', '/')
+            return ("/dev/root", "ext4", "/")
 
-        exists_mock_path = 'cloudinit.config.cc_resizefs.os.path.exists'
+        exists_mock_path = "cloudinit.config.cc_resizefs.os.path.exists"
         with mock.patch(exists_mock_path) as m_exists:
             m_exists.return_value = False
             devpath = wrap_and_call(
-                'cloudinit.config.cc_resizefs.util',
-                {'is_container': {'return_value': False},
-                 'get_mount_info': {'side_effect': fake_mount_info},
-                 'get_cmdline': {'return_value': 'BOOT_IMAGE=/vmlinuz.efi'}},
-                maybe_get_writable_device_path, '/dev/root', info, LOG)
+                "cloudinit.config.cc_resizefs.util",
+                {
+                    "is_container": {"return_value": False},
+                    "get_mount_info": {"side_effect": fake_mount_info},
+                    "get_cmdline": {"return_value": "BOOT_IMAGE=/vmlinuz.efi"},
+                },
+                maybe_get_writable_device_path,
+                "/dev/root",
+                info,
+                LOG,
+            )
         self.assertIsNone(devpath)
         logs = self.logs.getvalue()
         self.assertIn("WARNING: Unable to find device '/dev/root'", logs)
 
     def test_maybe_get_writable_device_path_does_not_exist(self):
         """When devpath does not exist, a warning is logged."""
-        info = 'dev=/dev/I/dont/exist mnt_point=/ path=/dev/none'
+        info = "dev=/dev/I/dont/exist mnt_point=/ path=/dev/none"
         devpath = wrap_and_call(
-            'cloudinit.config.cc_resizefs.util',
-            {'is_container': {'return_value': False}},
-            maybe_get_writable_device_path, '/dev/I/dont/exist', info, LOG)
+            "cloudinit.config.cc_resizefs.util",
+            {"is_container": {"return_value": False}},
+            maybe_get_writable_device_path,
+            "/dev/I/dont/exist",
+            info,
+            LOG,
+        )
         self.assertIsNone(devpath)
         self.assertIn(
             "WARNING: Device '/dev/I/dont/exist' did not exist."
-            ' cannot resize: %s' % info,
-            self.logs.getvalue())
+            " cannot resize: %s" % info,
+            self.logs.getvalue(),
+        )
 
     def test_maybe_get_writable_device_path_does_not_exist_in_container(self):
         """When devpath does not exist in a container, log a debug message."""
-        info = 'dev=/dev/I/dont/exist mnt_point=/ path=/dev/none'
+        info = "dev=/dev/I/dont/exist mnt_point=/ path=/dev/none"
         devpath = wrap_and_call(
-            'cloudinit.config.cc_resizefs.util',
-            {'is_container': {'return_value': True}},
-            maybe_get_writable_device_path, '/dev/I/dont/exist', info, LOG)
+            "cloudinit.config.cc_resizefs.util",
+            {"is_container": {"return_value": True}},
+            maybe_get_writable_device_path,
+            "/dev/I/dont/exist",
+            info,
+            LOG,
+        )
         self.assertIsNone(devpath)
         self.assertIn(
             "DEBUG: Device '/dev/I/dont/exist' did not exist in container."
-            ' cannot resize: %s' % info,
-            self.logs.getvalue())
+            " cannot resize: %s" % info,
+            self.logs.getvalue(),
+        )
 
     def test_maybe_get_writable_device_path_raises_oserror(self):
         """When unexpected OSError is raises by os.stat it is reraised."""
-        info = 'dev=/dev/I/dont/exist mnt_point=/ path=/dev/none'
+        info = "dev=/dev/I/dont/exist mnt_point=/ path=/dev/none"
         with self.assertRaises(OSError) as context_manager:
             wrap_and_call(
-                'cloudinit.config.cc_resizefs',
-                {'util.is_container': {'return_value': True},
-                 'os.stat': {'side_effect': OSError('Something unexpected')}},
-                maybe_get_writable_device_path, '/dev/I/dont/exist', info, LOG)
+                "cloudinit.config.cc_resizefs",
+                {
+                    "util.is_container": {"return_value": True},
+                    "os.stat": {
+                        "side_effect": OSError("Something unexpected")
+                    },
+                },
+                maybe_get_writable_device_path,
+                "/dev/I/dont/exist",
+                info,
+                LOG,
+            )
         self.assertEqual(
-            'Something unexpected', str(context_manager.exception))
+            "Something unexpected", str(context_manager.exception)
+        )
 
     def test_maybe_get_writable_device_path_non_block(self):
         """When device is not a block device, emit warning return False."""
-        fake_devpath = self.tmp_path('dev/readwrite')
-        util.write_file(fake_devpath, '', mode=0o600)  # read-write
-        info = 'dev=/dev/root mnt_point=/ path={0}'.format(fake_devpath)
+        fake_devpath = self.tmp_path("dev/readwrite")
+        util.write_file(fake_devpath, "", mode=0o600)  # read-write
+        info = "dev=/dev/root mnt_point=/ path={0}".format(fake_devpath)
 
         devpath = wrap_and_call(
-            'cloudinit.config.cc_resizefs.util',
-            {'is_container': {'return_value': False}},
-            maybe_get_writable_device_path, fake_devpath, info, LOG)
+            "cloudinit.config.cc_resizefs.util",
+            {"is_container": {"return_value": False}},
+            maybe_get_writable_device_path,
+            fake_devpath,
+            info,
+            LOG,
+        )
         self.assertIsNone(devpath)
         self.assertIn(
             "WARNING: device '{0}' not a block device. cannot resize".format(
-                fake_devpath),
-            self.logs.getvalue())
+                fake_devpath
+            ),
+            self.logs.getvalue(),
+        )
 
     def test_maybe_get_writable_device_path_non_block_on_container(self):
         """When device is non-block device in container, emit debug log."""
-        fake_devpath = self.tmp_path('dev/readwrite')
-        util.write_file(fake_devpath, '', mode=0o600)  # read-write
-        info = 'dev=/dev/root mnt_point=/ path={0}'.format(fake_devpath)
+        fake_devpath = self.tmp_path("dev/readwrite")
+        util.write_file(fake_devpath, "", mode=0o600)  # read-write
+        info = "dev=/dev/root mnt_point=/ path={0}".format(fake_devpath)
 
         devpath = wrap_and_call(
-            'cloudinit.config.cc_resizefs.util',
-            {'is_container': {'return_value': True}},
-            maybe_get_writable_device_path, fake_devpath, info, LOG)
+            "cloudinit.config.cc_resizefs.util",
+            {"is_container": {"return_value": True}},
+            maybe_get_writable_device_path,
+            fake_devpath,
+            info,
+            LOG,
+        )
         self.assertIsNone(devpath)
         self.assertIn(
             "DEBUG: device '{0}' not a block device in container."
-            ' cannot resize'.format(fake_devpath),
-            self.logs.getvalue())
+            " cannot resize".format(fake_devpath),
+            self.logs.getvalue(),
+        )
 
     def test_maybe_get_writable_device_path_returns_cmdline_root(self):
         """When root device is UUID in kernel commandline, update devpath."""
         # XXX Long-term we want to use FilesystemMocking test to avoid
         # touching os.stat.
         FakeStat = namedtuple(
-            'FakeStat', ['st_mode', 'st_size', 'st_mtime'])  # minimal def.
-        info = 'dev=/dev/root mnt_point=/ path=/does/not/matter'
+            "FakeStat", ["st_mode", "st_size", "st_mtime"]
+        )  # minimal def.
+        info = "dev=/dev/root mnt_point=/ path=/does/not/matter"
         devpath = wrap_and_call(
-            'cloudinit.config.cc_resizefs',
-            {'util.get_cmdline': {'return_value': 'asdf root=UUID=my-uuid'},
-             'util.is_container': False,
-             'os.path.exists': False,  # /dev/root doesn't exist
-             'os.stat': {
-                 'return_value': FakeStat(25008, 0, 1)}  # char block device
-             },
-            maybe_get_writable_device_path, '/dev/root', info, LOG)
-        self.assertEqual('/dev/disk/by-uuid/my-uuid', devpath)
+            "cloudinit.config.cc_resizefs",
+            {
+                "util.get_cmdline": {"return_value": "asdf root=UUID=my-uuid"},
+                "util.is_container": False,
+                "os.path.exists": False,  # /dev/root doesn't exist
+                "os.stat": {
+                    "return_value": FakeStat(25008, 0, 1)
+                },  # char block device
+            },
+            maybe_get_writable_device_path,
+            "/dev/root",
+            info,
+            LOG,
+        )
+        self.assertEqual("/dev/disk/by-uuid/my-uuid", devpath)
         self.assertIn(
             "DEBUG: Converted /dev/root to '/dev/disk/by-uuid/my-uuid'"
             " per kernel cmdline",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.util.mount_is_read_write')
-    @mock.patch('cloudinit.config.cc_resizefs.os.path.isdir')
+    @mock.patch("cloudinit.util.mount_is_read_write")
+    @mock.patch("cloudinit.config.cc_resizefs.os.path.isdir")
     def test_resize_btrfs_mount_is_ro(self, m_is_dir, m_is_rw):
         """Do not resize / directly if it is read-only. (LP: #1734787)."""
         m_is_rw.return_value = False
         m_is_dir.return_value = True
         self.assertEqual(
-            ('btrfs', 'filesystem', 'resize', 'max', '//.snapshots'),
-            _resize_btrfs("/", "/dev/sda1"))
+            ("btrfs", "filesystem", "resize", "max", "//.snapshots"),
+            _resize_btrfs("/", "/dev/sda1"),
+        )
 
-    @mock.patch('cloudinit.util.mount_is_read_write')
-    @mock.patch('cloudinit.config.cc_resizefs.os.path.isdir')
+    @mock.patch("cloudinit.util.mount_is_read_write")
+    @mock.patch("cloudinit.config.cc_resizefs.os.path.isdir")
     def test_resize_btrfs_mount_is_rw(self, m_is_dir, m_is_rw):
         """Do not resize / directly if it is read-only. (LP: #1734787)."""
         m_is_rw.return_value = True
         m_is_dir.return_value = True
         self.assertEqual(
-            ('btrfs', 'filesystem', 'resize', 'max', '/'),
-            _resize_btrfs("/", "/dev/sda1"))
+            ("btrfs", "filesystem", "resize", "max", "/"),
+            _resize_btrfs("/", "/dev/sda1"),
+        )
 
-    @mock.patch('cloudinit.util.is_container', return_value=True)
-    @mock.patch('cloudinit.util.is_FreeBSD')
-    def test_maybe_get_writable_device_path_zfs_freebsd(self, freebsd,
-                                                        m_is_container):
+    @mock.patch("cloudinit.util.is_container", return_value=True)
+    @mock.patch("cloudinit.util.is_FreeBSD")
+    def test_maybe_get_writable_device_path_zfs_freebsd(
+        self, freebsd, m_is_container
+    ):
         freebsd.return_value = True
-        info = 'dev=gpt/system mnt_point=/ path=/'
-        devpth = maybe_get_writable_device_path('gpt/system', info, LOG)
-        self.assertEqual('gpt/system', devpth)
+        info = "dev=gpt/system mnt_point=/ path=/"
+        devpth = maybe_get_writable_device_path("gpt/system", info, LOG)
+        self.assertEqual("gpt/system", devpth)
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_resolv_conf.py b/tests/unittests/config/test_cc_resolv_conf.py
index ab2de17a..8896a4e8 100644
--- a/tests/unittests/config/test_cc_resolv_conf.py
+++ b/tests/unittests/config/test_cc_resolv_conf.py
@@ -4,19 +4,16 @@ import logging
 import os
 import shutil
 import tempfile
-import pytest
 from copy import deepcopy
 from unittest import mock
 
-from cloudinit import cloud
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import util
+import pytest
 
-from tests.unittests import helpers as t_help
-from tests.unittests.util import MockDistro
+from cloudinit import cloud, distros, helpers, util
 from cloudinit.config import cc_resolv_conf
 from cloudinit.config.cc_resolv_conf import generate_resolv_conf
+from tests.unittests import helpers as t_help
+from tests.unittests.util import MockDistro
 
 LOG = logging.getLogger(__name__)
 EXPECTED_HEADER = """\
@@ -29,17 +26,17 @@ EXPECTED_HEADER = """\
 
 class TestResolvConf(t_help.FilesystemMockingTestCase):
     with_logs = True
-    cfg = {'manage_resolv_conf': True, 'resolv_conf': {}}
+    cfg = {"manage_resolv_conf": True, "resolv_conf": {}}
 
     def setUp(self):
         super(TestResolvConf, self).setUp()
         self.tmp = tempfile.mkdtemp()
-        util.ensure_dir(os.path.join(self.tmp, 'data'))
+        util.ensure_dir(os.path.join(self.tmp, "data"))
         self.addCleanup(shutil.rmtree, self.tmp)
 
     def _fetch_distro(self, kind, conf=None):
         cls = distros.fetch(kind)
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         conf = {} if conf is None else conf
         return cls(kind, conf, paths)
 
@@ -47,67 +44,73 @@ class TestResolvConf(t_help.FilesystemMockingTestCase):
         if not cc:
             ds = None
             distro = self._fetch_distro(distro_name, conf)
-            paths = helpers.Paths({'cloud_dir': self.tmp})
+            paths = helpers.Paths({"cloud_dir": self.tmp})
             cc = cloud.Cloud(ds, paths, {}, distro, None)
-        cc_resolv_conf.handle('cc_resolv_conf', conf, cc, LOG, [])
+        cc_resolv_conf.handle("cc_resolv_conf", conf, cc, LOG, [])
 
     @mock.patch("cloudinit.config.cc_resolv_conf.templater.render_to_file")
     def test_resolv_conf_systemd_resolved(self, m_render_to_file):
-        self.call_resolv_conf_handler('photon', self.cfg)
+        self.call_resolv_conf_handler("photon", self.cfg)
 
         assert [
-            mock.call(mock.ANY, '/etc/systemd/resolved.conf', mock.ANY)
+            mock.call(mock.ANY, "/etc/systemd/resolved.conf", mock.ANY)
         ] == m_render_to_file.call_args_list
 
     @mock.patch("cloudinit.config.cc_resolv_conf.templater.render_to_file")
     def test_resolv_conf_no_param(self, m_render_to_file):
         tmp = deepcopy(self.cfg)
         self.logs.truncate(0)
-        tmp.pop('resolv_conf')
-        self.call_resolv_conf_handler('photon', tmp)
+        tmp.pop("resolv_conf")
+        self.call_resolv_conf_handler("photon", tmp)
 
-        self.assertIn('manage_resolv_conf True but no parameters provided',
-                      self.logs.getvalue())
+        self.assertIn(
+            "manage_resolv_conf True but no parameters provided",
+            self.logs.getvalue(),
+        )
         assert [
-            mock.call(mock.ANY, '/etc/systemd/resolved.conf', mock.ANY)
+            mock.call(mock.ANY, "/etc/systemd/resolved.conf", mock.ANY)
         ] not in m_render_to_file.call_args_list
 
     @mock.patch("cloudinit.config.cc_resolv_conf.templater.render_to_file")
     def test_resolv_conf_manage_resolv_conf_false(self, m_render_to_file):
         tmp = deepcopy(self.cfg)
         self.logs.truncate(0)
-        tmp['manage_resolv_conf'] = False
-        self.call_resolv_conf_handler('photon', tmp)
-        self.assertIn("'manage_resolv_conf' present but set to False",
-                      self.logs.getvalue())
+        tmp["manage_resolv_conf"] = False
+        self.call_resolv_conf_handler("photon", tmp)
+        self.assertIn(
+            "'manage_resolv_conf' present but set to False",
+            self.logs.getvalue(),
+        )
         assert [
-            mock.call(mock.ANY, '/etc/systemd/resolved.conf', mock.ANY)
+            mock.call(mock.ANY, "/etc/systemd/resolved.conf", mock.ANY)
         ] not in m_render_to_file.call_args_list
 
     @mock.patch("cloudinit.config.cc_resolv_conf.templater.render_to_file")
     def test_resolv_conf_etc_resolv_conf(self, m_render_to_file):
-        self.call_resolv_conf_handler('rhel', self.cfg)
+        self.call_resolv_conf_handler("rhel", self.cfg)
 
         assert [
-            mock.call(mock.ANY, '/etc/resolv.conf', mock.ANY)
+            mock.call(mock.ANY, "/etc/resolv.conf", mock.ANY)
         ] == m_render_to_file.call_args_list
 
     @mock.patch("cloudinit.config.cc_resolv_conf.templater.render_to_file")
     def test_resolv_conf_invalid_resolve_conf_fn(self, m_render_to_file):
         ds = None
-        distro = self._fetch_distro('rhel', self.cfg)
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        distro = self._fetch_distro("rhel", self.cfg)
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         cc = cloud.Cloud(ds, paths, {}, distro, None)
-        cc.distro.resolve_conf_fn = 'bla'
+        cc.distro.resolve_conf_fn = "bla"
 
         self.logs.truncate(0)
-        self.call_resolv_conf_handler('rhel', self.cfg, cc)
+        self.call_resolv_conf_handler("rhel", self.cfg, cc)
 
-        self.assertIn('No template found, not rendering resolve configs',
-                      self.logs.getvalue())
+        self.assertIn(
+            "No template found, not rendering resolve configs",
+            self.logs.getvalue(),
+        )
 
         assert [
-            mock.call(mock.ANY, '/etc/resolv.conf', mock.ANY)
+            mock.call(mock.ANY, "/etc/resolv.conf", mock.ANY)
         ] not in m_render_to_file.call_args_list
 
 
@@ -119,9 +122,9 @@ class TestGenerateResolvConf:
     @mock.patch("cloudinit.config.cc_resolv_conf.templater.render_to_file")
     def test_dist_resolv_conf_fn(self, m_render_to_file):
         self.dist.resolve_conf_fn = "/tmp/resolv-test.conf"
-        generate_resolv_conf(self.tmpl_fn,
-                             mock.MagicMock(),
-                             self.dist.resolve_conf_fn)
+        generate_resolv_conf(
+            self.tmpl_fn, mock.MagicMock(), self.dist.resolve_conf_fn
+        )
 
         assert [
             mock.call(mock.ANY, self.dist.resolve_conf_fn, mock.ANY)
@@ -190,4 +193,5 @@ class TestGenerateResolvConf:
             mock.call(mock.ANY, expected_content, mode=mock.ANY)
         ] == m_write_file.call_args_list
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_rh_subscription.py b/tests/unittests/config/test_cc_rh_subscription.py
index bd7ebc98..fcc7db34 100644
--- a/tests/unittests/config/test_cc_rh_subscription.py
+++ b/tests/unittests/config/test_cc_rh_subscription.py
@@ -5,13 +5,12 @@
 import copy
 import logging
 
-from cloudinit.config import cc_rh_subscription
 from cloudinit import subp
-
+from cloudinit.config import cc_rh_subscription
 from tests.unittests.helpers import CiTestCase, mock
 
 SUBMGR = cc_rh_subscription.SubscriptionManager
-SUB_MAN_CLI = 'cloudinit.config.cc_rh_subscription._sub_man_cli'
+SUB_MAN_CLI = "cloudinit.config.cc_rh_subscription._sub_man_cli"
 
 
 @mock.patch(SUB_MAN_CLI)
@@ -26,87 +25,115 @@ class GoodTests(CiTestCase):
         self.args = []
         self.handle = cc_rh_subscription.handle
 
-        self.config = {'rh_subscription':
-                       {'username': 'scooby@do.com',
-                        'password': 'scooby-snacks'
-                        }}
-        self.config_full = {'rh_subscription':
-                            {'username': 'scooby@do.com',
-                             'password': 'scooby-snacks',
-                             'auto-attach': True,
-                             'service-level': 'self-support',
-                             'add-pool': ['pool1', 'pool2', 'pool3'],
-                             'enable-repo': ['repo1', 'repo2', 'repo3'],
-                             'disable-repo': ['repo4', 'repo5']
-                             }}
+        self.config = {
+            "rh_subscription": {
+                "username": "scooby@do.com",
+                "password": "scooby-snacks",
+            }
+        }
+        self.config_full = {
+            "rh_subscription": {
+                "username": "scooby@do.com",
+                "password": "scooby-snacks",
+                "auto-attach": True,
+                "service-level": "self-support",
+                "add-pool": ["pool1", "pool2", "pool3"],
+                "enable-repo": ["repo1", "repo2", "repo3"],
+                "disable-repo": ["repo4", "repo5"],
+            }
+        }
 
     def test_already_registered(self, m_sman_cli):
-        '''
+        """
         Emulates a system that is already registered. Ensure it gets
         a non-ProcessExecution error from is_registered()
-        '''
-        self.handle(self.name, self.config, self.cloud_init,
-                    self.log, self.args)
+        """
+        self.handle(
+            self.name, self.config, self.cloud_init, self.log, self.args
+        )
         self.assertEqual(m_sman_cli.call_count, 1)
-        self.assertIn('System is already registered', self.logs.getvalue())
+        self.assertIn("System is already registered", self.logs.getvalue())
 
     def test_simple_registration(self, m_sman_cli):
-        '''
+        """
         Simple registration with username and password
-        '''
-        reg = "The system has been registered with ID:" \
-              " 12345678-abde-abcde-1234-1234567890abc"
-        m_sman_cli.side_effect = [subp.ProcessExecutionError, (reg, 'bar')]
-        self.handle(self.name, self.config, self.cloud_init,
-                    self.log, self.args)
-        self.assertIn(mock.call(['identity']), m_sman_cli.call_args_list)
-        self.assertIn(mock.call(['register', '--username=scooby@do.com',
-                                 '--password=scooby-snacks'],
-                                logstring_val=True),
-                      m_sman_cli.call_args_list)
-        self.assertIn('rh_subscription plugin completed successfully',
-                      self.logs.getvalue())
+        """
+        reg = (
+            "The system has been registered with ID:"
+            " 12345678-abde-abcde-1234-1234567890abc"
+        )
+        m_sman_cli.side_effect = [subp.ProcessExecutionError, (reg, "bar")]
+        self.handle(
+            self.name, self.config, self.cloud_init, self.log, self.args
+        )
+        self.assertIn(mock.call(["identity"]), m_sman_cli.call_args_list)
+        self.assertIn(
+            mock.call(
+                [
+                    "register",
+                    "--username=scooby@do.com",
+                    "--password=scooby-snacks",
+                ],
+                logstring_val=True,
+            ),
+            m_sman_cli.call_args_list,
+        )
+        self.assertIn(
+            "rh_subscription plugin completed successfully",
+            self.logs.getvalue(),
+        )
         self.assertEqual(m_sman_cli.call_count, 2)
 
     @mock.patch.object(cc_rh_subscription.SubscriptionManager, "_getRepos")
     def test_update_repos_disable_with_none(self, m_get_repos, m_sman_cli):
         cfg = copy.deepcopy(self.config)
-        m_get_repos.return_value = ([], ['repo1'])
-        cfg['rh_subscription'].update(
-            {'enable-repo': ['repo1'], 'disable-repo': None})
+        m_get_repos.return_value = ([], ["repo1"])
+        cfg["rh_subscription"].update(
+            {"enable-repo": ["repo1"], "disable-repo": None}
+        )
         mysm = cc_rh_subscription.SubscriptionManager(cfg)
         self.assertEqual(True, mysm.update_repos())
         m_get_repos.assert_called_with()
-        self.assertEqual(m_sman_cli.call_args_list,
-                         [mock.call(['repos', '--enable=repo1'])])
+        self.assertEqual(
+            m_sman_cli.call_args_list, [mock.call(["repos", "--enable=repo1"])]
+        )
 
     def test_full_registration(self, m_sman_cli):
-        '''
+        """
         Registration with auto-attach, service-level, adding pools,
         and enabling and disabling yum repos
-        '''
+        """
         call_lists = []
-        call_lists.append(['attach', '--pool=pool1', '--pool=pool3'])
-        call_lists.append(['repos', '--disable=repo5', '--enable=repo2',
-                           '--enable=repo3'])
-        call_lists.append(['attach', '--auto', '--servicelevel=self-support'])
-        reg = "The system has been registered with ID:" \
-              " 12345678-abde-abcde-1234-1234567890abc"
+        call_lists.append(["attach", "--pool=pool1", "--pool=pool3"])
+        call_lists.append(
+            ["repos", "--disable=repo5", "--enable=repo2", "--enable=repo3"]
+        )
+        call_lists.append(["attach", "--auto", "--servicelevel=self-support"])
+        reg = (
+            "The system has been registered with ID:"
+            " 12345678-abde-abcde-1234-1234567890abc"
+        )
         m_sman_cli.side_effect = [
             subp.ProcessExecutionError,
-            (reg, 'bar'),
-            ('Service level set to: self-support', ''),
-            ('pool1\npool3\n', ''), ('pool2\n', ''), ('', ''),
-            ('Repo ID: repo1\nRepo ID: repo5\n', ''),
-            ('Repo ID: repo2\nRepo ID: repo3\nRepo ID: repo4', ''),
-            ('', '')]
-        self.handle(self.name, self.config_full, self.cloud_init,
-                    self.log, self.args)
+            (reg, "bar"),
+            ("Service level set to: self-support", ""),
+            ("pool1\npool3\n", ""),
+            ("pool2\n", ""),
+            ("", ""),
+            ("Repo ID: repo1\nRepo ID: repo5\n", ""),
+            ("Repo ID: repo2\nRepo ID: repo3\nRepo ID: repo4", ""),
+            ("", ""),
+        ]
+        self.handle(
+            self.name, self.config_full, self.cloud_init, self.log, self.args
+        )
         self.assertEqual(m_sman_cli.call_count, 9)
         for call in call_lists:
             self.assertIn(mock.call(call), m_sman_cli.call_args_list)
-        self.assertIn("rh_subscription plugin completed successfully",
-                      self.logs.getvalue())
+        self.assertIn(
+            "rh_subscription plugin completed successfully",
+            self.logs.getvalue(),
+        )
 
 
 @mock.patch(SUB_MAN_CLI)
@@ -117,38 +144,48 @@ class TestBadInput(CiTestCase):
     log = logging.getLogger("bad_tests")
     args = []
     SM = cc_rh_subscription.SubscriptionManager
-    reg = "The system has been registered with ID:" \
-          " 12345678-abde-abcde-1234-1234567890abc"
-
-    config_no_password = {'rh_subscription':
-                          {'username': 'scooby@do.com'
-                           }}
-
-    config_no_key = {'rh_subscription':
-                     {'activation-key': '1234abcde',
-                      }}
-
-    config_service = {'rh_subscription':
-                      {'username': 'scooby@do.com',
-                       'password': 'scooby-snacks',
-                       'service-level': 'self-support'
-                       }}
-
-    config_badpool = {'rh_subscription':
-                      {'username': 'scooby@do.com',
-                       'password': 'scooby-snacks',
-                       'add-pool': 'not_a_list'
-                       }}
-    config_badrepo = {'rh_subscription':
-                      {'username': 'scooby@do.com',
-                       'password': 'scooby-snacks',
-                       'enable-repo': 'not_a_list'
-                       }}
-    config_badkey = {'rh_subscription':
-                     {'activation-key': 'abcdef1234',
-                      'fookey': 'bar',
-                      'org': '123',
-                      }}
+    reg = (
+        "The system has been registered with ID:"
+        " 12345678-abde-abcde-1234-1234567890abc"
+    )
+
+    config_no_password = {"rh_subscription": {"username": "scooby@do.com"}}
+
+    config_no_key = {
+        "rh_subscription": {
+            "activation-key": "1234abcde",
+        }
+    }
+
+    config_service = {
+        "rh_subscription": {
+            "username": "scooby@do.com",
+            "password": "scooby-snacks",
+            "service-level": "self-support",
+        }
+    }
+
+    config_badpool = {
+        "rh_subscription": {
+            "username": "scooby@do.com",
+            "password": "scooby-snacks",
+            "add-pool": "not_a_list",
+        }
+    }
+    config_badrepo = {
+        "rh_subscription": {
+            "username": "scooby@do.com",
+            "password": "scooby-snacks",
+            "enable-repo": "not_a_list",
+        }
+    }
+    config_badkey = {
+        "rh_subscription": {
+            "activation-key": "abcdef1234",
+            "fookey": "bar",
+            "org": "123",
+        }
+    }
 
     def setUp(self):
         super(TestBadInput, self).setUp()
@@ -160,75 +197,124 @@ class TestBadInput(CiTestCase):
         self.assertEqual([], missing, "Missing expected warnings.")
 
     def test_no_password(self, m_sman_cli):
-        '''Attempt to register without the password key/value.'''
-        m_sman_cli.side_effect = [subp.ProcessExecutionError,
-                                  (self.reg, 'bar')]
-        self.handle(self.name, self.config_no_password, self.cloud_init,
-                    self.log, self.args)
+        """Attempt to register without the password key/value."""
+        m_sman_cli.side_effect = [
+            subp.ProcessExecutionError,
+            (self.reg, "bar"),
+        ]
+        self.handle(
+            self.name,
+            self.config_no_password,
+            self.cloud_init,
+            self.log,
+            self.args,
+        )
         self.assertEqual(m_sman_cli.call_count, 0)
 
     def test_no_org(self, m_sman_cli):
-        '''Attempt to register without the org key/value.'''
+        """Attempt to register without the org key/value."""
         m_sman_cli.side_effect = [subp.ProcessExecutionError]
-        self.handle(self.name, self.config_no_key, self.cloud_init,
-                    self.log, self.args)
-        m_sman_cli.assert_called_with(['identity'])
+        self.handle(
+            self.name, self.config_no_key, self.cloud_init, self.log, self.args
+        )
+        m_sman_cli.assert_called_with(["identity"])
         self.assertEqual(m_sman_cli.call_count, 1)
-        self.assert_logged_warnings((
-            'Unable to register system due to incomplete information.',
-            'Use either activationkey and org *or* userid and password',
-            'Registration failed or did not run completely',
-            'rh_subscription plugin did not complete successfully'))
+        self.assert_logged_warnings(
+            (
+                "Unable to register system due to incomplete information.",
+                "Use either activationkey and org *or* userid and password",
+                "Registration failed or did not run completely",
+                "rh_subscription plugin did not complete successfully",
+            )
+        )
 
     def test_service_level_without_auto(self, m_sman_cli):
-        '''Attempt to register using service-level without auto-attach key.'''
-        m_sman_cli.side_effect = [subp.ProcessExecutionError,
-                                  (self.reg, 'bar')]
-        self.handle(self.name, self.config_service, self.cloud_init,
-                    self.log, self.args)
+        """Attempt to register using service-level without auto-attach key."""
+        m_sman_cli.side_effect = [
+            subp.ProcessExecutionError,
+            (self.reg, "bar"),
+        ]
+        self.handle(
+            self.name,
+            self.config_service,
+            self.cloud_init,
+            self.log,
+            self.args,
+        )
         self.assertEqual(m_sman_cli.call_count, 1)
-        self.assert_logged_warnings((
-            'The service-level key must be used in conjunction with ',
-            'rh_subscription plugin did not complete successfully'))
+        self.assert_logged_warnings(
+            (
+                "The service-level key must be used in conjunction with ",
+                "rh_subscription plugin did not complete successfully",
+            )
+        )
 
     def test_pool_not_a_list(self, m_sman_cli):
-        '''
+        """
         Register with pools that are not in the format of a list
-        '''
-        m_sman_cli.side_effect = [subp.ProcessExecutionError,
-                                  (self.reg, 'bar')]
-        self.handle(self.name, self.config_badpool, self.cloud_init,
-                    self.log, self.args)
+        """
+        m_sman_cli.side_effect = [
+            subp.ProcessExecutionError,
+            (self.reg, "bar"),
+        ]
+        self.handle(
+            self.name,
+            self.config_badpool,
+            self.cloud_init,
+            self.log,
+            self.args,
+        )
         self.assertEqual(m_sman_cli.call_count, 2)
-        self.assert_logged_warnings((
-            'Pools must in the format of a list',
-            'rh_subscription plugin did not complete successfully'))
+        self.assert_logged_warnings(
+            (
+                "Pools must in the format of a list",
+                "rh_subscription plugin did not complete successfully",
+            )
+        )
 
     def test_repo_not_a_list(self, m_sman_cli):
-        '''
+        """
         Register with repos that are not in the format of a list
-        '''
-        m_sman_cli.side_effect = [subp.ProcessExecutionError,
-                                  (self.reg, 'bar')]
-        self.handle(self.name, self.config_badrepo, self.cloud_init,
-                    self.log, self.args)
+        """
+        m_sman_cli.side_effect = [
+            subp.ProcessExecutionError,
+            (self.reg, "bar"),
+        ]
+        self.handle(
+            self.name,
+            self.config_badrepo,
+            self.cloud_init,
+            self.log,
+            self.args,
+        )
         self.assertEqual(m_sman_cli.call_count, 2)
-        self.assert_logged_warnings((
-            'Repo IDs must in the format of a list.',
-            'Unable to add or remove repos',
-            'rh_subscription plugin did not complete successfully'))
+        self.assert_logged_warnings(
+            (
+                "Repo IDs must in the format of a list.",
+                "Unable to add or remove repos",
+                "rh_subscription plugin did not complete successfully",
+            )
+        )
 
     def test_bad_key_value(self, m_sman_cli):
-        '''
+        """
         Attempt to register with a key that we don't know
-        '''
-        m_sman_cli.side_effect = [subp.ProcessExecutionError,
-                                  (self.reg, 'bar')]
-        self.handle(self.name, self.config_badkey, self.cloud_init,
-                    self.log, self.args)
+        """
+        m_sman_cli.side_effect = [
+            subp.ProcessExecutionError,
+            (self.reg, "bar"),
+        ]
+        self.handle(
+            self.name, self.config_badkey, self.cloud_init, self.log, self.args
+        )
         self.assertEqual(m_sman_cli.call_count, 1)
-        self.assert_logged_warnings((
-            'fookey is not a valid key for rh_subscription. Valid keys are:',
-            'rh_subscription plugin did not complete successfully'))
+        self.assert_logged_warnings(
+            (
+                "fookey is not a valid key for rh_subscription. Valid keys"
+                " are:",
+                "rh_subscription plugin did not complete successfully",
+            )
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_rsyslog.py b/tests/unittests/config/test_cc_rsyslog.py
index bc147dac..e5d06ca2 100644
--- a/tests/unittests/config/test_cc_rsyslog.py
+++ b/tests/unittests/config/test_cc_rsyslog.py
@@ -4,11 +4,16 @@ import os
 import shutil
 import tempfile
 
-from cloudinit.config.cc_rsyslog import (
-    apply_rsyslog_changes, DEF_DIR, DEF_FILENAME, DEF_RELOAD, load_config,
-    parse_remotes_line, remotes_to_rsyslog_cfg)
 from cloudinit import util
-
+from cloudinit.config.cc_rsyslog import (
+    DEF_DIR,
+    DEF_FILENAME,
+    DEF_RELOAD,
+    apply_rsyslog_changes,
+    load_config,
+    parse_remotes_line,
+    remotes_to_rsyslog_cfg,
+)
 from tests.unittests import helpers as t_help
 
 
@@ -16,43 +21,46 @@ class TestLoadConfig(t_help.TestCase):
     def setUp(self):
         super(TestLoadConfig, self).setUp()
         self.basecfg = {
-            'config_filename': DEF_FILENAME,
-            'config_dir': DEF_DIR,
-            'service_reload_command': DEF_RELOAD,
-            'configs': [],
-            'remotes': {},
+            "config_filename": DEF_FILENAME,
+            "config_dir": DEF_DIR,
+            "service_reload_command": DEF_RELOAD,
+            "configs": [],
+            "remotes": {},
         }
 
     def test_legacy_full(self):
-        found = load_config({
-            'rsyslog': ['*.* @192.168.1.1'],
-            'rsyslog_dir': "mydir",
-            'rsyslog_filename': "myfilename"})
-        self.basecfg.update({
-            'configs': ['*.* @192.168.1.1'],
-            'config_dir': "mydir",
-            'config_filename': 'myfilename',
-            'service_reload_command': 'auto'}
+        found = load_config(
+            {
+                "rsyslog": ["*.* @192.168.1.1"],
+                "rsyslog_dir": "mydir",
+                "rsyslog_filename": "myfilename",
+            }
+        )
+        self.basecfg.update(
+            {
+                "configs": ["*.* @192.168.1.1"],
+                "config_dir": "mydir",
+                "config_filename": "myfilename",
+                "service_reload_command": "auto",
+            }
         )
 
         self.assertEqual(found, self.basecfg)
 
     def test_legacy_defaults(self):
-        found = load_config({
-            'rsyslog': ['*.* @192.168.1.1']})
-        self.basecfg.update({
-            'configs': ['*.* @192.168.1.1']})
+        found = load_config({"rsyslog": ["*.* @192.168.1.1"]})
+        self.basecfg.update({"configs": ["*.* @192.168.1.1"]})
         self.assertEqual(found, self.basecfg)
 
     def test_new_defaults(self):
         self.assertEqual(load_config({}), self.basecfg)
 
     def test_new_configs(self):
-        cfgs = ['*.* myhost', '*.* my2host']
-        self.basecfg.update({'configs': cfgs})
+        cfgs = ["*.* myhost", "*.* my2host"]
+        self.basecfg.update({"configs": cfgs})
         self.assertEqual(
-            load_config({'rsyslog': {'configs': cfgs}}),
-            self.basecfg)
+            load_config({"rsyslog": {"configs": cfgs}}), self.basecfg
+        )
 
 
 class TestApplyChanges(t_help.TestCase):
@@ -63,27 +71,29 @@ class TestApplyChanges(t_help.TestCase):
     def test_simple(self):
         cfgline = "*.* foohost"
         changed = apply_rsyslog_changes(
-            configs=[cfgline], def_fname="foo.cfg", cfg_dir=self.tmp)
+            configs=[cfgline], def_fname="foo.cfg", cfg_dir=self.tmp
+        )
 
         fname = os.path.join(self.tmp, "foo.cfg")
         self.assertEqual([fname], changed)
-        self.assertEqual(
-            util.load_file(fname), cfgline + "\n")
+        self.assertEqual(util.load_file(fname), cfgline + "\n")
 
     def test_multiple_files(self):
         configs = [
-            '*.* foohost',
-            {'content': 'abc', 'filename': 'my.cfg'},
-            {'content': 'filefoo-content',
-             'filename': os.path.join(self.tmp, 'mydir/mycfg')},
+            "*.* foohost",
+            {"content": "abc", "filename": "my.cfg"},
+            {
+                "content": "filefoo-content",
+                "filename": os.path.join(self.tmp, "mydir/mycfg"),
+            },
         ]
 
         changed = apply_rsyslog_changes(
-            configs=configs, def_fname="default.cfg", cfg_dir=self.tmp)
+            configs=configs, def_fname="default.cfg", cfg_dir=self.tmp
+        )
 
         expected = [
-            (os.path.join(self.tmp, "default.cfg"),
-             "*.* foohost\n"),
+            (os.path.join(self.tmp, "default.cfg"), "*.* foohost\n"),
             (os.path.join(self.tmp, "my.cfg"), "abc\n"),
             (os.path.join(self.tmp, "mydir/mycfg"), "filefoo-content\n"),
         ]
@@ -91,30 +101,37 @@ class TestApplyChanges(t_help.TestCase):
         actual = []
         for fname, _content in expected:
             util.load_file(fname)
-            actual.append((fname, util.load_file(fname),))
+            actual.append(
+                (
+                    fname,
+                    util.load_file(fname),
+                )
+            )
         self.assertEqual(expected, actual)
 
     def test_repeat_def(self):
-        configs = ['*.* foohost', "*.warn otherhost"]
+        configs = ["*.* foohost", "*.warn otherhost"]
 
         changed = apply_rsyslog_changes(
-            configs=configs, def_fname="default.cfg", cfg_dir=self.tmp)
+            configs=configs, def_fname="default.cfg", cfg_dir=self.tmp
+        )
 
         fname = os.path.join(self.tmp, "default.cfg")
         self.assertEqual([fname], changed)
 
-        expected_content = '\n'.join([c for c in configs]) + '\n'
+        expected_content = "\n".join([c for c in configs]) + "\n"
         found_content = util.load_file(fname)
         self.assertEqual(expected_content, found_content)
 
     def test_multiline_content(self):
-        configs = ['line1', 'line2\nline3\n']
+        configs = ["line1", "line2\nline3\n"]
 
         apply_rsyslog_changes(
-            configs=configs, def_fname="default.cfg", cfg_dir=self.tmp)
+            configs=configs, def_fname="default.cfg", cfg_dir=self.tmp
+        )
 
         fname = os.path.join(self.tmp, "default.cfg")
-        expected_content = '\n'.join([c for c in configs])
+        expected_content = "\n".join([c for c in configs])
         found_content = util.load_file(fname)
         self.assertEqual(expected_content, found_content)
 
@@ -152,7 +169,7 @@ class TestRemotesToSyslog(t_help.TestCase):
         # str rendered line must appear in remotes_to_ryslog_cfg return
         mycfg = "*.* myhost"
         myline = str(parse_remotes_line(mycfg, name="myname"))
-        r = remotes_to_rsyslog_cfg({'myname': mycfg})
+        r = remotes_to_rsyslog_cfg({"myname": mycfg})
         lines = r.splitlines()
         self.assertEqual(1, len(lines))
         self.assertTrue(myline in r.splitlines())
@@ -161,7 +178,8 @@ class TestRemotesToSyslog(t_help.TestCase):
         header = "#foo head"
         footer = "#foo foot"
         r = remotes_to_rsyslog_cfg(
-            {'myname': "*.* myhost"}, header=header, footer=footer)
+            {"myname": "*.* myhost"}, header=header, footer=footer
+        )
         lines = r.splitlines()
         self.assertTrue(header, lines[0])
         self.assertTrue(footer, lines[-1])
@@ -170,9 +188,11 @@ class TestRemotesToSyslog(t_help.TestCase):
         mycfg = "*.* myhost"
         myline = str(parse_remotes_line(mycfg, name="myname"))
         r = remotes_to_rsyslog_cfg(
-            {'myname': mycfg, 'removed': None, 'removed2': ""})
+            {"myname": mycfg, "removed": None, "removed2": ""}
+        )
         lines = r.splitlines()
         self.assertEqual(1, len(lines))
         self.assertTrue(myline in r.splitlines())
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_runcmd.py b/tests/unittests/config/test_cc_runcmd.py
index 01de6af0..34b3fb77 100644
--- a/tests/unittests/config/test_cc_runcmd.py
+++ b/tests/unittests/config/test_cc_runcmd.py
@@ -4,12 +4,14 @@ import os
 import stat
 from unittest.mock import patch
 
+from cloudinit import helpers, subp, util
 from cloudinit.config.cc_runcmd import handle, schema
-from cloudinit import (helpers, subp, util)
 from tests.unittests.helpers import (
-    CiTestCase, FilesystemMockingTestCase, SchemaTestCaseMixin,
-    skipUnlessJsonSchema)
-
+    CiTestCase,
+    FilesystemMockingTestCase,
+    SchemaTestCaseMixin,
+    skipUnlessJsonSchema,
+)
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -24,38 +26,40 @@ class TestRuncmd(FilesystemMockingTestCase):
         self.subp = subp.subp
         self.new_root = self.tmp_dir()
         self.patchUtils(self.new_root)
-        self.paths = helpers.Paths({'scripts': self.new_root})
+        self.paths = helpers.Paths({"scripts": self.new_root})
 
     def test_handler_skip_if_no_runcmd(self):
         """When the provided config doesn't contain runcmd, skip it."""
         cfg = {}
         mycloud = get_cloud(paths=self.paths)
-        handle('notimportant', cfg, mycloud, LOG, None)
+        handle("notimportant", cfg, mycloud, LOG, None)
         self.assertIn(
             "Skipping module named notimportant, no 'runcmd' key",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @patch('cloudinit.util.shellify')
+    @patch("cloudinit.util.shellify")
     def test_runcmd_shellify_fails(self, cls):
         """When shellify fails throw exception"""
         cls.side_effect = TypeError("patched shellify")
-        valid_config = {'runcmd': ['echo 42']}
+        valid_config = {"runcmd": ["echo 42"]}
         cc = get_cloud(paths=self.paths)
         with self.assertRaises(TypeError) as cm:
-            with self.allow_subp(['/bin/sh']):
-                handle('cc_runcmd', valid_config, cc, LOG, None)
+            with self.allow_subp(["/bin/sh"]):
+                handle("cc_runcmd", valid_config, cc, LOG, None)
         self.assertIn("Failed to shellify", str(cm.exception))
 
     def test_handler_invalid_command_set(self):
         """Commands which can't be converted to shell will raise errors."""
-        invalid_config = {'runcmd': 1}
+        invalid_config = {"runcmd": 1}
         cc = get_cloud(paths=self.paths)
         with self.assertRaises(TypeError) as cm:
-            handle('cc_runcmd', invalid_config, cc, LOG, [])
+            handle("cc_runcmd", invalid_config, cc, LOG, [])
         self.assertIn(
-            'Failed to shellify 1 into file'
-            ' /var/lib/cloud/instances/iid-datasource-none/scripts/runcmd',
-            str(cm.exception))
+            "Failed to shellify 1 into file"
+            " /var/lib/cloud/instances/iid-datasource-none/scripts/runcmd",
+            str(cm.exception),
+        )
 
     @skipUnlessJsonSchema()
     def test_handler_schema_validation_warns_non_array_type(self):
@@ -64,14 +68,15 @@ class TestRuncmd(FilesystemMockingTestCase):
         Schema validation is not strict, so runcmd attempts to shellify the
         invalid content.
         """
-        invalid_config = {'runcmd': 1}
+        invalid_config = {"runcmd": 1}
         cc = get_cloud(paths=self.paths)
         with self.assertRaises(TypeError) as cm:
-            handle('cc_runcmd', invalid_config, cc, LOG, [])
+            handle("cc_runcmd", invalid_config, cc, LOG, [])
         self.assertIn(
-            'Invalid config:\nruncmd: 1 is not of type \'array\'',
-            self.logs.getvalue())
-        self.assertIn('Failed to shellify', str(cm.exception))
+            "Invalid config:\nruncmd: 1 is not of type 'array'",
+            self.logs.getvalue(),
+        )
+        self.assertIn("Failed to shellify", str(cm.exception))
 
     @skipUnlessJsonSchema()
     def test_handler_schema_validation_warns_non_array_item_type(self):
@@ -81,28 +86,29 @@ class TestRuncmd(FilesystemMockingTestCase):
         invalid content.
         """
         invalid_config = {
-            'runcmd': ['ls /', 20, ['wget', 'http://stuff/blah'], {'a': 'n'}]}
+            "runcmd": ["ls /", 20, ["wget", "http://stuff/blah"], {"a": "n"}]
+        }
         cc = get_cloud(paths=self.paths)
         with self.assertRaises(TypeError) as cm:
-            handle('cc_runcmd', invalid_config, cc, LOG, [])
+            handle("cc_runcmd", invalid_config, cc, LOG, [])
         expected_warnings = [
-            'runcmd.1: 20 is not valid under any of the given schemas',
-            'runcmd.3: {\'a\': \'n\'} is not valid under any of the given'
-            ' schema'
+            "runcmd.1: 20 is not valid under any of the given schemas",
+            "runcmd.3: {'a': 'n'} is not valid under any of the given schema",
         ]
         logs = self.logs.getvalue()
         for warning in expected_warnings:
             self.assertIn(warning, logs)
-        self.assertIn('Failed to shellify', str(cm.exception))
+        self.assertIn("Failed to shellify", str(cm.exception))
 
     def test_handler_write_valid_runcmd_schema_to_file(self):
         """Valid runcmd schema is written to a runcmd shell script."""
-        valid_config = {'runcmd': [['ls', '/']]}
+        valid_config = {"runcmd": [["ls", "/"]]}
         cc = get_cloud(paths=self.paths)
-        handle('cc_runcmd', valid_config, cc, LOG, [])
+        handle("cc_runcmd", valid_config, cc, LOG, [])
         runcmd_file = os.path.join(
             self.new_root,
-            'var/lib/cloud/instances/iid-datasource-none/scripts/runcmd')
+            "var/lib/cloud/instances/iid-datasource-none/scripts/runcmd",
+        )
         self.assertEqual("#!/bin/sh\n'ls' '/'\n", util.load_file(runcmd_file))
         file_stat = os.stat(runcmd_file)
         self.assertEqual(0o700, stat.S_IMODE(file_stat.st_mode))
@@ -118,12 +124,14 @@ class TestSchema(CiTestCase, SchemaTestCaseMixin):
         """Duplicated commands array/array entries are allowed."""
         self.assertSchemaValid(
             [["echo", "bye"], ["echo", "bye"]],
-            "command entries can be duplicate.")
+            "command entries can be duplicate.",
+        )
 
     def test_duplicates_are_fine_array_string(self):
         """Duplicated commands array/string entries are allowed."""
         self.assertSchemaValid(
-            ["echo bye", "echo bye"],
-            "command entries can be duplicate.")
+            ["echo bye", "echo bye"], "command entries can be duplicate."
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_seed_random.py b/tests/unittests/config/test_cc_seed_random.py
index cfd67dce..8b2fdcdd 100644
--- a/tests/unittests/config/test_cc_seed_random.py
+++ b/tests/unittests/config/test_cc_seed_random.py
@@ -12,11 +12,9 @@ import logging
 import tempfile
 from io import BytesIO
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from cloudinit.config import cc_seed_random
 from tests.unittests import helpers as t_help
-
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -29,8 +27,8 @@ class TestRandomSeed(t_help.TestCase):
         self.unapply = []
 
         # by default 'which' has nothing in its path
-        self.apply_patches([(subp, 'which', self._which)])
-        self.apply_patches([(subp, 'subp', self._subp)])
+        self.apply_patches([(subp, "which", self._which)])
+        self.apply_patches([(subp, "subp", self._subp)])
         self.subp_called = []
         self.whichdata = {}
 
@@ -47,149 +45,166 @@ class TestRandomSeed(t_help.TestCase):
 
     def _subp(self, *args, **kwargs):
         # supports subp calling with cmd as args or kwargs
-        if 'args' not in kwargs:
-            kwargs['args'] = args[0]
+        if "args" not in kwargs:
+            kwargs["args"] = args[0]
         self.subp_called.append(kwargs)
         return
 
     def _compress(self, text):
         contents = BytesIO()
-        gz_fh = gzip.GzipFile(mode='wb', fileobj=contents)
+        gz_fh = gzip.GzipFile(mode="wb", fileobj=contents)
         gz_fh.write(text)
         gz_fh.close()
         return contents.getvalue()
 
     def test_append_random(self):
         cfg = {
-            'random_seed': {
-                'file': self._seed_file,
-                'data': 'tiny-tim-was-here',
+            "random_seed": {
+                "file": self._seed_file,
+                "data": "tiny-tim-was-here",
             }
         }
-        cc_seed_random.handle('test', cfg, get_cloud('ubuntu'), LOG, [])
+        cc_seed_random.handle("test", cfg, get_cloud("ubuntu"), LOG, [])
         contents = util.load_file(self._seed_file)
         self.assertEqual("tiny-tim-was-here", contents)
 
     def test_append_random_unknown_encoding(self):
         data = self._compress(b"tiny-toe")
         cfg = {
-            'random_seed': {
-                'file': self._seed_file,
-                'data': data,
-                'encoding': 'special_encoding',
+            "random_seed": {
+                "file": self._seed_file,
+                "data": data,
+                "encoding": "special_encoding",
             }
         }
-        self.assertRaises(IOError, cc_seed_random.handle, 'test', cfg,
-                          get_cloud('ubuntu'), LOG, [])
+        self.assertRaises(
+            IOError,
+            cc_seed_random.handle,
+            "test",
+            cfg,
+            get_cloud("ubuntu"),
+            LOG,
+            [],
+        )
 
     def test_append_random_gzip(self):
         data = self._compress(b"tiny-toe")
         cfg = {
-            'random_seed': {
-                'file': self._seed_file,
-                'data': data,
-                'encoding': 'gzip',
+            "random_seed": {
+                "file": self._seed_file,
+                "data": data,
+                "encoding": "gzip",
             }
         }
-        cc_seed_random.handle('test', cfg, get_cloud('ubuntu'), LOG, [])
+        cc_seed_random.handle("test", cfg, get_cloud("ubuntu"), LOG, [])
         contents = util.load_file(self._seed_file)
         self.assertEqual("tiny-toe", contents)
 
     def test_append_random_gz(self):
         data = self._compress(b"big-toe")
         cfg = {
-            'random_seed': {
-                'file': self._seed_file,
-                'data': data,
-                'encoding': 'gz',
+            "random_seed": {
+                "file": self._seed_file,
+                "data": data,
+                "encoding": "gz",
             }
         }
-        cc_seed_random.handle('test', cfg, get_cloud('ubuntu'), LOG, [])
+        cc_seed_random.handle("test", cfg, get_cloud("ubuntu"), LOG, [])
         contents = util.load_file(self._seed_file)
         self.assertEqual("big-toe", contents)
 
     def test_append_random_base64(self):
-        data = util.b64e('bubbles')
+        data = util.b64e("bubbles")
         cfg = {
-            'random_seed': {
-                'file': self._seed_file,
-                'data': data,
-                'encoding': 'base64',
+            "random_seed": {
+                "file": self._seed_file,
+                "data": data,
+                "encoding": "base64",
             }
         }
-        cc_seed_random.handle('test', cfg, get_cloud('ubuntu'), LOG, [])
+        cc_seed_random.handle("test", cfg, get_cloud("ubuntu"), LOG, [])
         contents = util.load_file(self._seed_file)
         self.assertEqual("bubbles", contents)
 
     def test_append_random_b64(self):
-        data = util.b64e('kit-kat')
+        data = util.b64e("kit-kat")
         cfg = {
-            'random_seed': {
-                'file': self._seed_file,
-                'data': data,
-                'encoding': 'b64',
+            "random_seed": {
+                "file": self._seed_file,
+                "data": data,
+                "encoding": "b64",
             }
         }
-        cc_seed_random.handle('test', cfg, get_cloud('ubuntu'), LOG, [])
+        cc_seed_random.handle("test", cfg, get_cloud("ubuntu"), LOG, [])
         contents = util.load_file(self._seed_file)
         self.assertEqual("kit-kat", contents)
 
     def test_append_random_metadata(self):
         cfg = {
-            'random_seed': {
-                'file': self._seed_file,
-                'data': 'tiny-tim-was-here',
+            "random_seed": {
+                "file": self._seed_file,
+                "data": "tiny-tim-was-here",
             }
         }
-        c = get_cloud('ubuntu', metadata={'random_seed': '-so-was-josh'})
-        cc_seed_random.handle('test', cfg, c, LOG, [])
+        c = get_cloud("ubuntu", metadata={"random_seed": "-so-was-josh"})
+        cc_seed_random.handle("test", cfg, c, LOG, [])
         contents = util.load_file(self._seed_file)
-        self.assertEqual('tiny-tim-was-here-so-was-josh', contents)
+        self.assertEqual("tiny-tim-was-here-so-was-josh", contents)
 
     def test_seed_command_provided_and_available(self):
-        c = get_cloud('ubuntu')
-        self.whichdata = {'pollinate': '/usr/bin/pollinate'}
-        cfg = {'random_seed': {'command': ['pollinate', '-q']}}
-        cc_seed_random.handle('test', cfg, c, LOG, [])
+        c = get_cloud("ubuntu")
+        self.whichdata = {"pollinate": "/usr/bin/pollinate"}
+        cfg = {"random_seed": {"command": ["pollinate", "-q"]}}
+        cc_seed_random.handle("test", cfg, c, LOG, [])
 
-        subp_args = [f['args'] for f in self.subp_called]
-        self.assertIn(['pollinate', '-q'], subp_args)
+        subp_args = [f["args"] for f in self.subp_called]
+        self.assertIn(["pollinate", "-q"], subp_args)
 
     def test_seed_command_not_provided(self):
-        c = get_cloud('ubuntu')
+        c = get_cloud("ubuntu")
         self.whichdata = {}
-        cc_seed_random.handle('test', {}, c, LOG, [])
+        cc_seed_random.handle("test", {}, c, LOG, [])
 
         # subp should not have been called as which would say not available
         self.assertFalse(self.subp_called)
 
     def test_unavailable_seed_command_and_required_raises_error(self):
-        c = get_cloud('ubuntu')
+        c = get_cloud("ubuntu")
         self.whichdata = {}
-        cfg = {'random_seed': {'command': ['THIS_NO_COMMAND'],
-                               'command_required': True}}
-        self.assertRaises(ValueError, cc_seed_random.handle,
-                          'test', cfg, c, LOG, [])
+        cfg = {
+            "random_seed": {
+                "command": ["THIS_NO_COMMAND"],
+                "command_required": True,
+            }
+        }
+        self.assertRaises(
+            ValueError, cc_seed_random.handle, "test", cfg, c, LOG, []
+        )
 
     def test_seed_command_and_required(self):
-        c = get_cloud('ubuntu')
-        self.whichdata = {'foo': 'foo'}
-        cfg = {'random_seed': {'command_required': True, 'command': ['foo']}}
-        cc_seed_random.handle('test', cfg, c, LOG, [])
+        c = get_cloud("ubuntu")
+        self.whichdata = {"foo": "foo"}
+        cfg = {"random_seed": {"command_required": True, "command": ["foo"]}}
+        cc_seed_random.handle("test", cfg, c, LOG, [])
 
-        self.assertIn(['foo'], [f['args'] for f in self.subp_called])
+        self.assertIn(["foo"], [f["args"] for f in self.subp_called])
 
     def test_file_in_environment_for_command(self):
-        c = get_cloud('ubuntu')
-        self.whichdata = {'foo': 'foo'}
-        cfg = {'random_seed': {'command_required': True, 'command': ['foo'],
-                               'file': self._seed_file}}
-        cc_seed_random.handle('test', cfg, c, LOG, [])
+        c = get_cloud("ubuntu")
+        self.whichdata = {"foo": "foo"}
+        cfg = {
+            "random_seed": {
+                "command_required": True,
+                "command": ["foo"],
+                "file": self._seed_file,
+            }
+        }
+        cc_seed_random.handle("test", cfg, c, LOG, [])
 
         # this just instists that the first time subp was called,
         # RANDOM_SEED_FILE was in the environment set up correctly
-        subp_env = [f['env'] for f in self.subp_called]
-        self.assertEqual(subp_env[0].get('RANDOM_SEED_FILE'), self._seed_file)
+        subp_env = [f["env"] for f in self.subp_called]
+        self.assertEqual(subp_env[0].get("RANDOM_SEED_FILE"), self._seed_file)
 
 
 def apply_patches(patches):
@@ -202,4 +217,5 @@ def apply_patches(patches):
         ret.append((ref, name, orig))
     return ret
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_set_hostname.py b/tests/unittests/config/test_cc_set_hostname.py
index b9a783a7..fd994c4e 100644
--- a/tests/unittests/config/test_cc_set_hostname.py
+++ b/tests/unittests/config/test_cc_set_hostname.py
@@ -1,15 +1,5 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.config import cc_set_hostname
-
-from cloudinit import cloud
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import util
-
-from tests.unittests import helpers as t_help
-
-from configobj import ConfigObj
 import logging
 import os
 import shutil
@@ -17,6 +7,12 @@ import tempfile
 from io import BytesIO
 from unittest import mock
 
+from configobj import ConfigObj
+
+from cloudinit import cloud, distros, helpers, util
+from cloudinit.config import cc_set_hostname
+from tests.unittests import helpers as t_help
+
 LOG = logging.getLogger(__name__)
 
 
@@ -27,181 +23,186 @@ class TestHostname(t_help.FilesystemMockingTestCase):
     def setUp(self):
         super(TestHostname, self).setUp()
         self.tmp = tempfile.mkdtemp()
-        util.ensure_dir(os.path.join(self.tmp, 'data'))
+        util.ensure_dir(os.path.join(self.tmp, "data"))
         self.addCleanup(shutil.rmtree, self.tmp)
 
     def _fetch_distro(self, kind, conf=None):
         cls = distros.fetch(kind)
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         conf = {} if conf is None else conf
         return cls(kind, conf, paths)
 
     def test_debian_write_hostname_prefer_fqdn(self):
         cfg = {
-            'hostname': 'blah',
-            'prefer_fqdn_over_hostname': True,
-            'fqdn': 'blah.yahoo.com',
+            "hostname": "blah",
+            "prefer_fqdn_over_hostname": True,
+            "fqdn": "blah.yahoo.com",
         }
-        distro = self._fetch_distro('debian', cfg)
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        distro = self._fetch_distro("debian", cfg)
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
-        cc_set_hostname.handle('cc_set_hostname',
-                               cfg, cc, LOG, [])
+        cc_set_hostname.handle("cc_set_hostname", cfg, cc, LOG, [])
         contents = util.load_file("/etc/hostname")
-        self.assertEqual('blah.yahoo.com', contents.strip())
+        self.assertEqual("blah.yahoo.com", contents.strip())
 
-    @mock.patch('cloudinit.distros.Distro.uses_systemd', return_value=False)
+    @mock.patch("cloudinit.distros.Distro.uses_systemd", return_value=False)
     def test_rhel_write_hostname_prefer_hostname(self, m_uses_systemd):
         cfg = {
-            'hostname': 'blah',
-            'prefer_fqdn_over_hostname': False,
-            'fqdn': 'blah.yahoo.com',
+            "hostname": "blah",
+            "prefer_fqdn_over_hostname": False,
+            "fqdn": "blah.yahoo.com",
         }
-        distro = self._fetch_distro('rhel', cfg)
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        distro = self._fetch_distro("rhel", cfg)
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
-        cc_set_hostname.handle('cc_set_hostname',
-                               cfg, cc, LOG, [])
+        cc_set_hostname.handle("cc_set_hostname", cfg, cc, LOG, [])
         contents = util.load_file("/etc/sysconfig/network", decode=False)
         n_cfg = ConfigObj(BytesIO(contents))
-        self.assertEqual(
-            {'HOSTNAME': 'blah'},
-            dict(n_cfg))
+        self.assertEqual({"HOSTNAME": "blah"}, dict(n_cfg))
 
-    @mock.patch('cloudinit.distros.Distro.uses_systemd', return_value=False)
+    @mock.patch("cloudinit.distros.Distro.uses_systemd", return_value=False)
     def test_write_hostname_rhel(self, m_uses_systemd):
-        cfg = {
-            'hostname': 'blah',
-            'fqdn': 'blah.blah.blah.yahoo.com'
-        }
-        distro = self._fetch_distro('rhel')
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        cfg = {"hostname": "blah", "fqdn": "blah.blah.blah.yahoo.com"}
+        distro = self._fetch_distro("rhel")
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
-        cc_set_hostname.handle('cc_set_hostname',
-                               cfg, cc, LOG, [])
+        cc_set_hostname.handle("cc_set_hostname", cfg, cc, LOG, [])
         contents = util.load_file("/etc/sysconfig/network", decode=False)
         n_cfg = ConfigObj(BytesIO(contents))
-        self.assertEqual(
-            {'HOSTNAME': 'blah.blah.blah.yahoo.com'},
-            dict(n_cfg))
+        self.assertEqual({"HOSTNAME": "blah.blah.blah.yahoo.com"}, dict(n_cfg))
 
     def test_write_hostname_debian(self):
         cfg = {
-            'hostname': 'blah',
-            'fqdn': 'blah.blah.blah.yahoo.com',
+            "hostname": "blah",
+            "fqdn": "blah.blah.blah.yahoo.com",
         }
-        distro = self._fetch_distro('debian')
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        distro = self._fetch_distro("debian")
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
-        cc_set_hostname.handle('cc_set_hostname',
-                               cfg, cc, LOG, [])
+        cc_set_hostname.handle("cc_set_hostname", cfg, cc, LOG, [])
         contents = util.load_file("/etc/hostname")
-        self.assertEqual('blah', contents.strip())
+        self.assertEqual("blah", contents.strip())
 
-    @mock.patch('cloudinit.distros.Distro.uses_systemd', return_value=False)
+    @mock.patch("cloudinit.distros.Distro.uses_systemd", return_value=False)
     def test_write_hostname_sles(self, m_uses_systemd):
         cfg = {
-            'hostname': 'blah.blah.blah.suse.com',
+            "hostname": "blah.blah.blah.suse.com",
         }
-        distro = self._fetch_distro('sles')
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        distro = self._fetch_distro("sles")
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
-        cc_set_hostname.handle('cc_set_hostname', cfg, cc, LOG, [])
+        cc_set_hostname.handle("cc_set_hostname", cfg, cc, LOG, [])
         contents = util.load_file(distro.hostname_conf_fn)
-        self.assertEqual('blah', contents.strip())
+        self.assertEqual("blah", contents.strip())
 
-    @mock.patch('cloudinit.distros.photon.subp.subp')
+    @mock.patch("cloudinit.distros.photon.subp.subp")
     def test_photon_hostname(self, m_subp):
         cfg1 = {
-            'hostname': 'photon',
-            'prefer_fqdn_over_hostname': True,
-            'fqdn': 'test1.vmware.com',
+            "hostname": "photon",
+            "prefer_fqdn_over_hostname": True,
+            "fqdn": "test1.vmware.com",
         }
         cfg2 = {
-            'hostname': 'photon',
-            'prefer_fqdn_over_hostname': False,
-            'fqdn': 'test2.vmware.com',
+            "hostname": "photon",
+            "prefer_fqdn_over_hostname": False,
+            "fqdn": "test2.vmware.com",
         }
 
         ds = None
         m_subp.return_value = (None, None)
-        distro = self._fetch_distro('photon', cfg1)
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        distro = self._fetch_distro("photon", cfg1)
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         for c in [cfg1, cfg2]:
-            cc_set_hostname.handle('cc_set_hostname', c, cc, LOG, [])
+            cc_set_hostname.handle("cc_set_hostname", c, cc, LOG, [])
             print("\n", m_subp.call_args_list)
-            if c['prefer_fqdn_over_hostname']:
+            if c["prefer_fqdn_over_hostname"]:
                 assert [
-                    mock.call(['hostnamectl', 'set-hostname', c['fqdn']],
-                              capture=True)
+                    mock.call(
+                        ["hostnamectl", "set-hostname", c["fqdn"]],
+                        capture=True,
+                    )
                 ] in m_subp.call_args_list
                 assert [
-                    mock.call(['hostnamectl', 'set-hostname', c['hostname']],
-                              capture=True)
+                    mock.call(
+                        ["hostnamectl", "set-hostname", c["hostname"]],
+                        capture=True,
+                    )
                 ] not in m_subp.call_args_list
             else:
                 assert [
-                    mock.call(['hostnamectl', 'set-hostname', c['hostname']],
-                              capture=True)
+                    mock.call(
+                        ["hostnamectl", "set-hostname", c["hostname"]],
+                        capture=True,
+                    )
                 ] in m_subp.call_args_list
                 assert [
-                    mock.call(['hostnamectl', 'set-hostname', c['fqdn']],
-                              capture=True)
+                    mock.call(
+                        ["hostnamectl", "set-hostname", c["fqdn"]],
+                        capture=True,
+                    )
                 ] not in m_subp.call_args_list
 
     def test_multiple_calls_skips_unchanged_hostname(self):
         """Only new hostname or fqdn values will generate a hostname call."""
-        distro = self._fetch_distro('debian')
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        distro = self._fetch_distro("debian")
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
         cc_set_hostname.handle(
-            'cc_set_hostname', {'hostname': 'hostname1.me.com'}, cc, LOG, [])
+            "cc_set_hostname", {"hostname": "hostname1.me.com"}, cc, LOG, []
+        )
         contents = util.load_file("/etc/hostname")
-        self.assertEqual('hostname1', contents.strip())
+        self.assertEqual("hostname1", contents.strip())
         cc_set_hostname.handle(
-            'cc_set_hostname', {'hostname': 'hostname1.me.com'}, cc, LOG, [])
+            "cc_set_hostname", {"hostname": "hostname1.me.com"}, cc, LOG, []
+        )
         self.assertIn(
-            'DEBUG: No hostname changes. Skipping set-hostname\n',
-            self.logs.getvalue())
+            "DEBUG: No hostname changes. Skipping set-hostname\n",
+            self.logs.getvalue(),
+        )
         cc_set_hostname.handle(
-            'cc_set_hostname', {'hostname': 'hostname2.me.com'}, cc, LOG, [])
+            "cc_set_hostname", {"hostname": "hostname2.me.com"}, cc, LOG, []
+        )
         contents = util.load_file("/etc/hostname")
-        self.assertEqual('hostname2', contents.strip())
+        self.assertEqual("hostname2", contents.strip())
         self.assertIn(
-            'Non-persistently setting the system hostname to hostname2',
-            self.logs.getvalue())
+            "Non-persistently setting the system hostname to hostname2",
+            self.logs.getvalue(),
+        )
 
     def test_error_on_distro_set_hostname_errors(self):
         """Raise SetHostnameError on exceptions from distro.set_hostname."""
-        distro = self._fetch_distro('debian')
+        distro = self._fetch_distro("debian")
 
         def set_hostname_error(hostname, fqdn):
             raise Exception("OOPS on: %s" % fqdn)
 
         distro.set_hostname = set_hostname_error
-        paths = helpers.Paths({'cloud_dir': self.tmp})
+        paths = helpers.Paths({"cloud_dir": self.tmp})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
         with self.assertRaises(cc_set_hostname.SetHostnameError) as ctx_mgr:
             cc_set_hostname.handle(
-                'somename', {'hostname': 'hostname1.me.com'}, cc, LOG, [])
+                "somename", {"hostname": "hostname1.me.com"}, cc, LOG, []
+            )
         self.assertEqual(
-            'Failed to set the hostname to hostname1.me.com (hostname1):'
-            ' OOPS on: hostname1.me.com',
-            str(ctx_mgr.exception))
+            "Failed to set the hostname to hostname1.me.com (hostname1):"
+            " OOPS on: hostname1.me.com",
+            str(ctx_mgr.exception),
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_set_passwords.py b/tests/unittests/config/test_cc_set_passwords.py
index 9bcd0439..bc81214b 100644
--- a/tests/unittests/config/test_cc_set_passwords.py
+++ b/tests/unittests/config/test_cc_set_passwords.py
@@ -2,9 +2,9 @@
 
 from unittest import mock
 
+from cloudinit import util
 from cloudinit.config import cc_set_passwords as setpass
 from tests.unittests.helpers import CiTestCase
-from cloudinit import util
 
 MODPATH = "cloudinit.config.cc_set_passwords."
 
@@ -16,27 +16,29 @@ class TestHandleSshPwauth(CiTestCase):
 
     @mock.patch("cloudinit.distros.subp.subp")
     def test_unknown_value_logs_warning(self, m_subp):
-        cloud = self.tmp_cloud(distro='ubuntu')
+        cloud = self.tmp_cloud(distro="ubuntu")
         setpass.handle_ssh_pwauth("floo", cloud.distro)
-        self.assertIn("Unrecognized value: ssh_pwauth=floo",
-                      self.logs.getvalue())
+        self.assertIn(
+            "Unrecognized value: ssh_pwauth=floo", self.logs.getvalue()
+        )
         m_subp.assert_not_called()
 
     @mock.patch(MODPATH + "update_ssh_config", return_value=True)
     @mock.patch("cloudinit.distros.subp.subp")
     def test_systemctl_as_service_cmd(self, m_subp, m_update_ssh_config):
         """If systemctl in service cmd: systemctl restart name."""
-        cloud = self.tmp_cloud(distro='ubuntu')
-        cloud.distro.init_cmd = ['systemctl']
+        cloud = self.tmp_cloud(distro="ubuntu")
+        cloud.distro.init_cmd = ["systemctl"]
         setpass.handle_ssh_pwauth(True, cloud.distro)
         m_subp.assert_called_with(
-            ["systemctl", "restart", "ssh"], capture=True)
+            ["systemctl", "restart", "ssh"], capture=True
+        )
 
     @mock.patch(MODPATH + "update_ssh_config", return_value=False)
     @mock.patch("cloudinit.distros.subp.subp")
     def test_not_restarted_if_not_updated(self, m_subp, m_update_ssh_config):
         """If config is not updated, then no system restart should be done."""
-        cloud = self.tmp_cloud(distro='ubuntu')
+        cloud = self.tmp_cloud(distro="ubuntu")
         setpass.handle_ssh_pwauth(True, cloud.distro)
         m_subp.assert_not_called()
         self.assertIn("No need to restart SSH", self.logs.getvalue())
@@ -45,7 +47,7 @@ class TestHandleSshPwauth(CiTestCase):
     @mock.patch("cloudinit.distros.subp.subp")
     def test_unchanged_does_nothing(self, m_subp, m_update_ssh_config):
         """If 'unchanged', then no updates to config and no restart."""
-        cloud = self.tmp_cloud(distro='ubuntu')
+        cloud = self.tmp_cloud(distro="ubuntu")
         setpass.handle_ssh_pwauth("unchanged", cloud.distro)
         m_update_ssh_config.assert_not_called()
         m_subp.assert_not_called()
@@ -53,7 +55,7 @@ class TestHandleSshPwauth(CiTestCase):
     @mock.patch("cloudinit.distros.subp.subp")
     def test_valid_change_values(self, m_subp):
         """If value is a valid changen value, then update should be called."""
-        cloud = self.tmp_cloud(distro='ubuntu')
+        cloud = self.tmp_cloud(distro="ubuntu")
         upname = MODPATH + "update_ssh_config"
         optname = "PasswordAuthentication"
         for value in util.FALSE_STRINGS + util.TRUE_STRINGS:
@@ -71,52 +73,65 @@ class TestSetPasswordsHandle(CiTestCase):
 
     def test_handle_on_empty_config(self, *args):
         """handle logs that no password has changed when config is empty."""
-        cloud = self.tmp_cloud(distro='ubuntu')
+        cloud = self.tmp_cloud(distro="ubuntu")
         setpass.handle(
-            'IGNORED', cfg={}, cloud=cloud, log=self.logger, args=[])
+            "IGNORED", cfg={}, cloud=cloud, log=self.logger, args=[]
+        )
         self.assertEqual(
             "DEBUG: Leaving SSH config 'PasswordAuthentication' unchanged. "
-            'ssh_pwauth=None\n',
-            self.logs.getvalue())
+            "ssh_pwauth=None\n",
+            self.logs.getvalue(),
+        )
 
     def test_handle_on_chpasswd_list_parses_common_hashes(self):
         """handle parses command password hashes."""
-        cloud = self.tmp_cloud(distro='ubuntu')
+        cloud = self.tmp_cloud(distro="ubuntu")
         valid_hashed_pwds = [
-            'root:$2y$10$8BQjxjVByHA/Ee.O1bCXtO8S7Y5WojbXWqnqYpUW.BrPx/'
-            'Dlew1Va',
-            'ubuntu:$6$5hOurLPO$naywm3Ce0UlmZg9gG2Fl9acWCVEoakMMC7dR52q'
-            'SDexZbrN9z8yHxhUM2b.sxpguSwOlbOQSW/HpXazGGx3oo1']
-        cfg = {'chpasswd': {'list': valid_hashed_pwds}}
-        with mock.patch.object(setpass, 'chpasswd') as chpasswd:
+            "root:$2y$10$8BQjxjVByHA/Ee.O1bCXtO8S7Y5WojbXWqnqYpUW.BrPx/"
+            "Dlew1Va",
+            "ubuntu:$6$5hOurLPO$naywm3Ce0UlmZg9gG2Fl9acWCVEoakMMC7dR52q"
+            "SDexZbrN9z8yHxhUM2b.sxpguSwOlbOQSW/HpXazGGx3oo1",
+        ]
+        cfg = {"chpasswd": {"list": valid_hashed_pwds}}
+        with mock.patch.object(setpass, "chpasswd") as chpasswd:
             setpass.handle(
-                'IGNORED', cfg=cfg, cloud=cloud, log=self.logger, args=[])
+                "IGNORED", cfg=cfg, cloud=cloud, log=self.logger, args=[]
+            )
         self.assertIn(
-            'DEBUG: Handling input for chpasswd as list.',
-            self.logs.getvalue())
+            "DEBUG: Handling input for chpasswd as list.", self.logs.getvalue()
+        )
         self.assertIn(
             "DEBUG: Setting hashed password for ['root', 'ubuntu']",
-            self.logs.getvalue())
-        valid = '\n'.join(valid_hashed_pwds) + '\n'
+            self.logs.getvalue(),
+        )
+        valid = "\n".join(valid_hashed_pwds) + "\n"
         called = chpasswd.call_args[0][1]
         self.assertEqual(valid, called)
 
     @mock.patch(MODPATH + "util.is_BSD")
     @mock.patch(MODPATH + "subp.subp")
     def test_bsd_calls_custom_pw_cmds_to_set_and_expire_passwords(
-            self, m_subp, m_is_bsd):
+        self, m_subp, m_is_bsd
+    ):
         """BSD don't use chpasswd"""
         m_is_bsd.return_value = True
-        cloud = self.tmp_cloud(distro='freebsd')
-        valid_pwds = ['ubuntu:passw0rd']
-        cfg = {'chpasswd': {'list': valid_pwds}}
+        cloud = self.tmp_cloud(distro="freebsd")
+        valid_pwds = ["ubuntu:passw0rd"]
+        cfg = {"chpasswd": {"list": valid_pwds}}
         setpass.handle(
-            'IGNORED', cfg=cfg, cloud=cloud, log=self.logger, args=[])
-        self.assertEqual([
-            mock.call(['pw', 'usermod', 'ubuntu', '-h', '0'], data='passw0rd',
-                      logstring="chpasswd for ubuntu"),
-            mock.call(['pw', 'usermod', 'ubuntu', '-p', '01-Jan-1970'])],
-            m_subp.call_args_list)
+            "IGNORED", cfg=cfg, cloud=cloud, log=self.logger, args=[]
+        )
+        self.assertEqual(
+            [
+                mock.call(
+                    ["pw", "usermod", "ubuntu", "-h", "0"],
+                    data="passw0rd",
+                    logstring="chpasswd for ubuntu",
+                ),
+                mock.call(["pw", "usermod", "ubuntu", "-p", "01-Jan-1970"]),
+            ],
+            m_subp.call_args_list,
+        )
 
     @mock.patch(MODPATH + "util.multi_log")
     @mock.patch(MODPATH + "subp.subp")
@@ -124,29 +139,29 @@ class TestSetPasswordsHandle(CiTestCase):
         self, m_subp, m_multi_log
     ):
         """handle parses command set random passwords."""
-        cloud = self.tmp_cloud(distro='ubuntu')
-        valid_random_pwds = [
-            'root:R',
-            'ubuntu:RANDOM']
-        cfg = {'chpasswd': {'expire': 'false', 'list': valid_random_pwds}}
-        with mock.patch.object(setpass, 'chpasswd') as chpasswd:
+        cloud = self.tmp_cloud(distro="ubuntu")
+        valid_random_pwds = ["root:R", "ubuntu:RANDOM"]
+        cfg = {"chpasswd": {"expire": "false", "list": valid_random_pwds}}
+        with mock.patch.object(setpass, "chpasswd") as chpasswd:
             setpass.handle(
-                'IGNORED', cfg=cfg, cloud=cloud, log=self.logger, args=[])
+                "IGNORED", cfg=cfg, cloud=cloud, log=self.logger, args=[]
+            )
         self.assertIn(
-            'DEBUG: Handling input for chpasswd as list.',
-            self.logs.getvalue())
+            "DEBUG: Handling input for chpasswd as list.", self.logs.getvalue()
+        )
         self.assertEqual(1, chpasswd.call_count)
         passwords, _ = chpasswd.call_args
         user_pass = {
             user: password
-            for user, password
-            in (line.split(":") for line in passwords[1].splitlines())
+            for user, password in (
+                line.split(":") for line in passwords[1].splitlines()
+            )
         }
 
         self.assertEqual(1, m_multi_log.call_count)
         self.assertEqual(
             mock.call(mock.ANY, stderr=False, fallback_to_stdout=False),
-            m_multi_log.call_args
+            m_multi_log.call_args,
         )
 
         self.assertEqual(set(["root", "ubuntu"]), set(user_pass.keys()))
diff --git a/tests/unittests/config/test_cc_snap.py b/tests/unittests/config/test_cc_snap.py
index e8113eca..f7e66ad2 100644
--- a/tests/unittests/config/test_cc_snap.py
+++ b/tests/unittests/config/test_cc_snap.py
@@ -3,14 +3,23 @@
 import re
 from io import StringIO
 
+from cloudinit import util
 from cloudinit.config.cc_snap import (
-    ASSERTIONS_FILE, add_assertions, handle, maybe_install_squashfuse,
-    run_commands, schema)
+    ASSERTIONS_FILE,
+    add_assertions,
+    handle,
+    maybe_install_squashfuse,
+    run_commands,
+    schema,
+)
 from cloudinit.config.schema import validate_cloudconfig_schema
-from cloudinit import util
 from tests.unittests.helpers import (
-    CiTestCase, SchemaTestCaseMixin, mock, wrap_and_call, skipUnlessJsonSchema)
-
+    CiTestCase,
+    SchemaTestCaseMixin,
+    mock,
+    skipUnlessJsonSchema,
+    wrap_and_call,
+)
 
 SYSTEM_USER_ASSERTION = """\
 type: system-user
@@ -92,11 +101,11 @@ class TestAddAssertions(CiTestCase):
         super(TestAddAssertions, self).setUp()
         self.tmp = self.tmp_dir()
 
-    @mock.patch('cloudinit.config.cc_snap.subp.subp')
+    @mock.patch("cloudinit.config.cc_snap.subp.subp")
     def test_add_assertions_on_empty_list(self, m_subp):
         """When provided with an empty list, add_assertions does nothing."""
         add_assertions([])
-        self.assertEqual('', self.logs.getvalue())
+        self.assertEqual("", self.logs.getvalue())
         m_subp.assert_not_called()
 
     def test_add_assertions_on_non_list_or_dict(self):
@@ -105,58 +114,72 @@ class TestAddAssertions(CiTestCase):
             add_assertions(assertions="I'm Not Valid")
         self.assertEqual(
             "assertion parameter was not a list or dict: I'm Not Valid",
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.subp.subp')
+    @mock.patch("cloudinit.config.cc_snap.subp.subp")
     def test_add_assertions_adds_assertions_as_list(self, m_subp):
         """When provided with a list, add_assertions adds all assertions."""
         self.assertEqual(
-            ASSERTIONS_FILE, '/var/lib/cloud/instance/snapd.assertions')
-        assert_file = self.tmp_path('snapd.assertions', dir=self.tmp)
+            ASSERTIONS_FILE, "/var/lib/cloud/instance/snapd.assertions"
+        )
+        assert_file = self.tmp_path("snapd.assertions", dir=self.tmp)
         assertions = [SYSTEM_USER_ASSERTION, ACCOUNT_ASSERTION]
         wrap_and_call(
-            'cloudinit.config.cc_snap',
-            {'ASSERTIONS_FILE': {'new': assert_file}},
-            add_assertions, assertions)
+            "cloudinit.config.cc_snap",
+            {"ASSERTIONS_FILE": {"new": assert_file}},
+            add_assertions,
+            assertions,
+        )
         self.assertIn(
-            'Importing user-provided snap assertions', self.logs.getvalue())
-        self.assertIn(
-            'sertions', self.logs.getvalue())
+            "Importing user-provided snap assertions", self.logs.getvalue()
+        )
+        self.assertIn("sertions", self.logs.getvalue())
         self.assertEqual(
-            [mock.call(['snap', 'ack', assert_file], capture=True)],
-            m_subp.call_args_list)
-        compare_file = self.tmp_path('comparison', dir=self.tmp)
-        util.write_file(compare_file, '\n'.join(assertions).encode('utf-8'))
+            [mock.call(["snap", "ack", assert_file], capture=True)],
+            m_subp.call_args_list,
+        )
+        compare_file = self.tmp_path("comparison", dir=self.tmp)
+        util.write_file(compare_file, "\n".join(assertions).encode("utf-8"))
         self.assertEqual(
-            util.load_file(compare_file), util.load_file(assert_file))
+            util.load_file(compare_file), util.load_file(assert_file)
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.subp.subp')
+    @mock.patch("cloudinit.config.cc_snap.subp.subp")
     def test_add_assertions_adds_assertions_as_dict(self, m_subp):
         """When provided with a dict, add_assertions adds all assertions."""
         self.assertEqual(
-            ASSERTIONS_FILE, '/var/lib/cloud/instance/snapd.assertions')
-        assert_file = self.tmp_path('snapd.assertions', dir=self.tmp)
-        assertions = {'00': SYSTEM_USER_ASSERTION, '01': ACCOUNT_ASSERTION}
+            ASSERTIONS_FILE, "/var/lib/cloud/instance/snapd.assertions"
+        )
+        assert_file = self.tmp_path("snapd.assertions", dir=self.tmp)
+        assertions = {"00": SYSTEM_USER_ASSERTION, "01": ACCOUNT_ASSERTION}
         wrap_and_call(
-            'cloudinit.config.cc_snap',
-            {'ASSERTIONS_FILE': {'new': assert_file}},
-            add_assertions, assertions)
+            "cloudinit.config.cc_snap",
+            {"ASSERTIONS_FILE": {"new": assert_file}},
+            add_assertions,
+            assertions,
+        )
         self.assertIn(
-            'Importing user-provided snap assertions', self.logs.getvalue())
+            "Importing user-provided snap assertions", self.logs.getvalue()
+        )
         self.assertIn(
             "DEBUG: Snap acking: ['type: system-user', 'authority-id: Lqv",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
         self.assertIn(
             "DEBUG: Snap acking: ['type: account-key', 'authority-id: canonic",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
         self.assertEqual(
-            [mock.call(['snap', 'ack', assert_file], capture=True)],
-            m_subp.call_args_list)
-        compare_file = self.tmp_path('comparison', dir=self.tmp)
-        combined = '\n'.join(assertions.values())
-        util.write_file(compare_file, combined.encode('utf-8'))
+            [mock.call(["snap", "ack", assert_file], capture=True)],
+            m_subp.call_args_list,
+        )
+        compare_file = self.tmp_path("comparison", dir=self.tmp)
+        combined = "\n".join(assertions.values())
+        util.write_file(compare_file, combined.encode("utf-8"))
         self.assertEqual(
-            util.load_file(compare_file), util.load_file(assert_file))
+            util.load_file(compare_file), util.load_file(assert_file)
+        )
 
 
 class TestRunCommands(CiTestCase):
@@ -168,11 +191,11 @@ class TestRunCommands(CiTestCase):
         super(TestRunCommands, self).setUp()
         self.tmp = self.tmp_dir()
 
-    @mock.patch('cloudinit.config.cc_snap.subp.subp')
+    @mock.patch("cloudinit.config.cc_snap.subp.subp")
     def test_run_commands_on_empty_list(self, m_subp):
         """When provided with an empty list, run_commands does nothing."""
         run_commands([])
-        self.assertEqual('', self.logs.getvalue())
+        self.assertEqual("", self.logs.getvalue())
         m_subp.assert_not_called()
 
     def test_run_commands_on_non_list_or_dict(self):
@@ -181,68 +204,74 @@ class TestRunCommands(CiTestCase):
             run_commands(commands="I'm Not Valid")
         self.assertEqual(
             "commands parameter was not a list or dict: I'm Not Valid",
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
     def test_run_command_logs_commands_and_exit_codes_to_stderr(self):
         """All exit codes are logged to stderr."""
-        outfile = self.tmp_path('output.log', dir=self.tmp)
+        outfile = self.tmp_path("output.log", dir=self.tmp)
 
         cmd1 = 'echo "HI" >> %s' % outfile
-        cmd2 = 'bogus command'
+        cmd2 = "bogus command"
         cmd3 = 'echo "MOM" >> %s' % outfile
         commands = [cmd1, cmd2, cmd3]
 
-        mock_path = 'cloudinit.config.cc_snap.sys.stderr'
+        mock_path = "cloudinit.config.cc_snap.sys.stderr"
         with mock.patch(mock_path, new_callable=StringIO) as m_stderr:
             with self.assertRaises(RuntimeError) as context_manager:
                 run_commands(commands=commands)
 
         self.assertIsNotNone(
-            re.search(r'bogus: (command )?not found',
-                      str(context_manager.exception)),
-            msg='Expected bogus command not found')
-        expected_stderr_log = '\n'.join([
-            'Begin run command: {cmd}'.format(cmd=cmd1),
-            'End run command: exit(0)',
-            'Begin run command: {cmd}'.format(cmd=cmd2),
-            'ERROR: End run command: exit(127)',
-            'Begin run command: {cmd}'.format(cmd=cmd3),
-            'End run command: exit(0)\n'])
+            re.search(
+                r"bogus: (command )?not found", str(context_manager.exception)
+            ),
+            msg="Expected bogus command not found",
+        )
+        expected_stderr_log = "\n".join(
+            [
+                "Begin run command: {cmd}".format(cmd=cmd1),
+                "End run command: exit(0)",
+                "Begin run command: {cmd}".format(cmd=cmd2),
+                "ERROR: End run command: exit(127)",
+                "Begin run command: {cmd}".format(cmd=cmd3),
+                "End run command: exit(0)\n",
+            ]
+        )
         self.assertEqual(expected_stderr_log, m_stderr.getvalue())
 
     def test_run_command_as_lists(self):
         """When commands are specified as a list, run them in order."""
-        outfile = self.tmp_path('output.log', dir=self.tmp)
+        outfile = self.tmp_path("output.log", dir=self.tmp)
 
         cmd1 = 'echo "HI" >> %s' % outfile
         cmd2 = 'echo "MOM" >> %s' % outfile
         commands = [cmd1, cmd2]
-        mock_path = 'cloudinit.config.cc_snap.sys.stderr'
+        mock_path = "cloudinit.config.cc_snap.sys.stderr"
         with mock.patch(mock_path, new_callable=StringIO):
             run_commands(commands=commands)
 
         self.assertIn(
-            'DEBUG: Running user-provided snap commands',
-            self.logs.getvalue())
-        self.assertEqual('HI\nMOM\n', util.load_file(outfile))
+            "DEBUG: Running user-provided snap commands", self.logs.getvalue()
+        )
+        self.assertEqual("HI\nMOM\n", util.load_file(outfile))
         self.assertIn(
-            'WARNING: Non-snap commands in snap config:', self.logs.getvalue())
+            "WARNING: Non-snap commands in snap config:", self.logs.getvalue()
+        )
 
     def test_run_command_dict_sorted_as_command_script(self):
         """When commands are a dict, sort them and run."""
-        outfile = self.tmp_path('output.log', dir=self.tmp)
+        outfile = self.tmp_path("output.log", dir=self.tmp)
         cmd1 = 'echo "HI" >> %s' % outfile
         cmd2 = 'echo "MOM" >> %s' % outfile
-        commands = {'02': cmd1, '01': cmd2}
-        mock_path = 'cloudinit.config.cc_snap.sys.stderr'
+        commands = {"02": cmd1, "01": cmd2}
+        mock_path = "cloudinit.config.cc_snap.sys.stderr"
         with mock.patch(mock_path, new_callable=StringIO):
             run_commands(commands=commands)
 
-        expected_messages = [
-            'DEBUG: Running user-provided snap commands']
+        expected_messages = ["DEBUG: Running user-provided snap commands"]
         for message in expected_messages:
             self.assertIn(message, self.logs.getvalue())
-        self.assertEqual('MOM\nHI\n', util.load_file(outfile))
+        self.assertEqual("MOM\nHI\n", util.load_file(outfile))
 
 
 @skipUnlessJsonSchema()
@@ -253,70 +282,72 @@ class TestSchema(CiTestCase, SchemaTestCaseMixin):
 
     def test_schema_warns_on_snap_not_as_dict(self):
         """If the snap configuration is not a dict, emit a warning."""
-        validate_cloudconfig_schema({'snap': 'wrong type'}, schema)
+        validate_cloudconfig_schema({"snap": "wrong type"}, schema)
         self.assertEqual(
             "WARNING: Invalid config:\nsnap: 'wrong type' is not of type"
             " 'object'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
     def test_schema_disallows_unknown_keys(self, _):
         """Unknown keys in the snap configuration emit warnings."""
         validate_cloudconfig_schema(
-            {'snap': {'commands': ['ls'], 'invalid-key': ''}}, schema)
+            {"snap": {"commands": ["ls"], "invalid-key": ""}}, schema
+        )
         self.assertIn(
-            'WARNING: Invalid config:\nsnap: Additional properties are not'
+            "WARNING: Invalid config:\nsnap: Additional properties are not"
             " allowed ('invalid-key' was unexpected)",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
     def test_warn_schema_requires_either_commands_or_assertions(self):
         """Warn when snap configuration lacks both commands and assertions."""
-        validate_cloudconfig_schema(
-            {'snap': {}}, schema)
+        validate_cloudconfig_schema({"snap": {}}, schema)
         self.assertIn(
-            'WARNING: Invalid config:\nsnap: {} does not have enough'
-            ' properties',
-            self.logs.getvalue())
+            "WARNING: Invalid config:\nsnap: {} does not have enough"
+            " properties",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
     def test_warn_schema_commands_is_not_list_or_dict(self, _):
         """Warn when snap:commands config is not a list or dict."""
-        validate_cloudconfig_schema(
-            {'snap': {'commands': 'broken'}}, schema)
+        validate_cloudconfig_schema({"snap": {"commands": "broken"}}, schema)
         self.assertEqual(
             "WARNING: Invalid config:\nsnap.commands: 'broken' is not of type"
             " 'object', 'array'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
     def test_warn_schema_when_commands_is_empty(self, _):
         """Emit warnings when snap:commands is an empty list or dict."""
-        validate_cloudconfig_schema(
-            {'snap': {'commands': []}}, schema)
-        validate_cloudconfig_schema(
-            {'snap': {'commands': {}}}, schema)
+        validate_cloudconfig_schema({"snap": {"commands": []}}, schema)
+        validate_cloudconfig_schema({"snap": {"commands": {}}}, schema)
         self.assertEqual(
             "WARNING: Invalid config:\nsnap.commands: [] is too short\n"
             "WARNING: Invalid config:\nsnap.commands: {} does not have enough"
             " properties\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
     def test_schema_when_commands_are_list_or_dict(self, _):
         """No warnings when snap:commands are either a list or dict."""
+        validate_cloudconfig_schema({"snap": {"commands": ["valid"]}}, schema)
         validate_cloudconfig_schema(
-            {'snap': {'commands': ['valid']}}, schema)
-        validate_cloudconfig_schema(
-            {'snap': {'commands': {'01': 'also valid'}}}, schema)
-        self.assertEqual('', self.logs.getvalue())
+            {"snap": {"commands": {"01": "also valid"}}}, schema
+        )
+        self.assertEqual("", self.logs.getvalue())
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
     def test_schema_when_commands_values_are_invalid_type(self, _):
         """Warnings when snap:commands values are invalid type (e.g. int)"""
+        validate_cloudconfig_schema({"snap": {"commands": [123]}}, schema)
         validate_cloudconfig_schema(
-            {'snap': {'commands': [123]}}, schema)
-        validate_cloudconfig_schema(
-            {'snap': {'commands': {'01': 123}}}, schema)
+            {"snap": {"commands": {"01": 123}}}, schema
+        )
         self.assertEqual(
             "WARNING: Invalid config:\n"
             "snap.commands.0: 123 is not valid under any of the given"
@@ -324,15 +355,18 @@ class TestSchema(CiTestCase, SchemaTestCaseMixin):
             "WARNING: Invalid config:\n"
             "snap.commands.01: 123 is not valid under any of the given"
             " schemas\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
     def test_schema_when_commands_list_values_are_invalid_type(self, _):
         """Warnings when snap:commands list values are wrong type (e.g. int)"""
         validate_cloudconfig_schema(
-            {'snap': {'commands': [["snap", "install", 123]]}}, schema)
+            {"snap": {"commands": [["snap", "install", 123]]}}, schema
+        )
         validate_cloudconfig_schema(
-            {'snap': {'commands': {'01': ["snap", "install", 123]}}}, schema)
+            {"snap": {"commands": {"01": ["snap", "install", 123]}}}, schema
+        )
         self.assertEqual(
             "WARNING: Invalid config:\n"
             "snap.commands.0: ['snap', 'install', 123] is not valid under any"
@@ -340,77 +374,84 @@ class TestSchema(CiTestCase, SchemaTestCaseMixin):
             "WARNING: Invalid config:\n"
             "snap.commands.0: ['snap', 'install', 123] is not valid under any"
             " of the given schemas\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
     def test_schema_when_assertions_values_are_invalid_type(self, _):
         """Warnings when snap:assertions values are invalid type (e.g. int)"""
+        validate_cloudconfig_schema({"snap": {"assertions": [123]}}, schema)
         validate_cloudconfig_schema(
-            {'snap': {'assertions': [123]}}, schema)
-        validate_cloudconfig_schema(
-            {'snap': {'assertions': {'01': 123}}}, schema)
+            {"snap": {"assertions": {"01": 123}}}, schema
+        )
         self.assertEqual(
             "WARNING: Invalid config:\n"
             "snap.assertions.0: 123 is not of type 'string'\n"
             "WARNING: Invalid config:\n"
             "snap.assertions.01: 123 is not of type 'string'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.add_assertions')
+    @mock.patch("cloudinit.config.cc_snap.add_assertions")
     def test_warn_schema_assertions_is_not_list_or_dict(self, _):
         """Warn when snap:assertions config is not a list or dict."""
-        validate_cloudconfig_schema(
-            {'snap': {'assertions': 'broken'}}, schema)
+        validate_cloudconfig_schema({"snap": {"assertions": "broken"}}, schema)
         self.assertEqual(
             "WARNING: Invalid config:\nsnap.assertions: 'broken' is not of"
             " type 'object', 'array'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.add_assertions')
+    @mock.patch("cloudinit.config.cc_snap.add_assertions")
     def test_warn_schema_when_assertions_is_empty(self, _):
         """Emit warnings when snap:assertions is an empty list or dict."""
-        validate_cloudconfig_schema(
-            {'snap': {'assertions': []}}, schema)
-        validate_cloudconfig_schema(
-            {'snap': {'assertions': {}}}, schema)
+        validate_cloudconfig_schema({"snap": {"assertions": []}}, schema)
+        validate_cloudconfig_schema({"snap": {"assertions": {}}}, schema)
         self.assertEqual(
             "WARNING: Invalid config:\nsnap.assertions: [] is too short\n"
             "WARNING: Invalid config:\nsnap.assertions: {} does not have"
             " enough properties\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.add_assertions')
+    @mock.patch("cloudinit.config.cc_snap.add_assertions")
     def test_schema_when_assertions_are_list_or_dict(self, _):
         """No warnings when snap:assertions are a list or dict."""
         validate_cloudconfig_schema(
-            {'snap': {'assertions': ['valid']}}, schema)
+            {"snap": {"assertions": ["valid"]}}, schema
+        )
         validate_cloudconfig_schema(
-            {'snap': {'assertions': {'01': 'also valid'}}}, schema)
-        self.assertEqual('', self.logs.getvalue())
+            {"snap": {"assertions": {"01": "also valid"}}}, schema
+        )
+        self.assertEqual("", self.logs.getvalue())
 
     def test_duplicates_are_fine_array_array(self):
         """Duplicated commands array/array entries are allowed."""
         self.assertSchemaValid(
-            {'commands': [["echo", "bye"], ["echo", "bye"]]},
-            "command entries can be duplicate.")
+            {"commands": [["echo", "bye"], ["echo", "bye"]]},
+            "command entries can be duplicate.",
+        )
 
     def test_duplicates_are_fine_array_string(self):
         """Duplicated commands array/string entries are allowed."""
         self.assertSchemaValid(
-            {'commands': ["echo bye", "echo bye"]},
-            "command entries can be duplicate.")
+            {"commands": ["echo bye", "echo bye"]},
+            "command entries can be duplicate.",
+        )
 
     def test_duplicates_are_fine_dict_array(self):
         """Duplicated commands dict/array entries are allowed."""
         self.assertSchemaValid(
-            {'commands': {'00': ["echo", "bye"], '01': ["echo", "bye"]}},
-            "command entries can be duplicate.")
+            {"commands": {"00": ["echo", "bye"], "01": ["echo", "bye"]}},
+            "command entries can be duplicate.",
+        )
 
     def test_duplicates_are_fine_dict_string(self):
         """Duplicated commands dict/string entries are allowed."""
         self.assertSchemaValid(
-            {'commands': {'00': "echo bye", '01': "echo bye"}},
-            "command entries can be duplicate.")
+            {"commands": {"00": "echo bye", "01": "echo bye"}},
+            "command entries can be duplicate.",
+        )
 
 
 class TestHandle(CiTestCase):
@@ -421,92 +462,122 @@ class TestHandle(CiTestCase):
         super(TestHandle, self).setUp()
         self.tmp = self.tmp_dir()
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
-    @mock.patch('cloudinit.config.cc_snap.add_assertions')
-    @mock.patch('cloudinit.config.cc_snap.validate_cloudconfig_schema')
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
+    @mock.patch("cloudinit.config.cc_snap.add_assertions")
+    @mock.patch("cloudinit.config.cc_snap.validate_cloudconfig_schema")
     def test_handle_no_config(self, m_schema, m_add, m_run):
         """When no snap-related configuration is provided, nothing happens."""
         cfg = {}
-        handle('snap', cfg=cfg, cloud=None, log=self.logger, args=None)
+        handle("snap", cfg=cfg, cloud=None, log=self.logger, args=None)
         self.assertIn(
             "DEBUG: Skipping module named snap, no 'snap' key in config",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
         m_schema.assert_not_called()
         m_add.assert_not_called()
         m_run.assert_not_called()
 
-    @mock.patch('cloudinit.config.cc_snap.run_commands')
-    @mock.patch('cloudinit.config.cc_snap.add_assertions')
-    @mock.patch('cloudinit.config.cc_snap.maybe_install_squashfuse')
-    def test_handle_skips_squashfuse_when_unconfigured(self, m_squash, m_add,
-                                                       m_run):
+    @mock.patch("cloudinit.config.cc_snap.run_commands")
+    @mock.patch("cloudinit.config.cc_snap.add_assertions")
+    @mock.patch("cloudinit.config.cc_snap.maybe_install_squashfuse")
+    def test_handle_skips_squashfuse_when_unconfigured(
+        self, m_squash, m_add, m_run
+    ):
         """When squashfuse_in_container is unset, don't attempt to install."""
         handle(
-            'snap', cfg={'snap': {}}, cloud=None, log=self.logger, args=None)
+            "snap", cfg={"snap": {}}, cloud=None, log=self.logger, args=None
+        )
         handle(
-            'snap', cfg={'snap': {'squashfuse_in_container': None}},
-            cloud=None, log=self.logger, args=None)
+            "snap",
+            cfg={"snap": {"squashfuse_in_container": None}},
+            cloud=None,
+            log=self.logger,
+            args=None,
+        )
         handle(
-            'snap', cfg={'snap': {'squashfuse_in_container': False}},
-            cloud=None, log=self.logger, args=None)
+            "snap",
+            cfg={"snap": {"squashfuse_in_container": False}},
+            cloud=None,
+            log=self.logger,
+            args=None,
+        )
         self.assertEqual([], m_squash.call_args_list)  # No calls
         # snap configuration missing assertions and commands will default to []
         self.assertIn(mock.call([]), m_add.call_args_list)
         self.assertIn(mock.call([]), m_run.call_args_list)
 
-    @mock.patch('cloudinit.config.cc_snap.maybe_install_squashfuse')
+    @mock.patch("cloudinit.config.cc_snap.maybe_install_squashfuse")
     def test_handle_tries_to_install_squashfuse(self, m_squash):
         """If squashfuse_in_container is True, try installing squashfuse."""
-        cfg = {'snap': {'squashfuse_in_container': True}}
+        cfg = {"snap": {"squashfuse_in_container": True}}
         mycloud = FakeCloud(None)
-        handle('snap', cfg=cfg, cloud=mycloud, log=self.logger, args=None)
-        self.assertEqual(
-            [mock.call(mycloud)], m_squash.call_args_list)
+        handle("snap", cfg=cfg, cloud=mycloud, log=self.logger, args=None)
+        self.assertEqual([mock.call(mycloud)], m_squash.call_args_list)
 
     def test_handle_runs_commands_provided(self):
         """If commands are specified as a list, run them."""
-        outfile = self.tmp_path('output.log', dir=self.tmp)
+        outfile = self.tmp_path("output.log", dir=self.tmp)
 
         cfg = {
-            'snap': {'commands': ['echo "HI" >> %s' % outfile,
-                                  'echo "MOM" >> %s' % outfile]}}
-        mock_path = 'cloudinit.config.cc_snap.sys.stderr'
+            "snap": {
+                "commands": [
+                    'echo "HI" >> %s' % outfile,
+                    'echo "MOM" >> %s' % outfile,
+                ]
+            }
+        }
+        mock_path = "cloudinit.config.cc_snap.sys.stderr"
         with self.allow_subp([CiTestCase.SUBP_SHELL_TRUE]):
             with mock.patch(mock_path, new_callable=StringIO):
-                handle('snap', cfg=cfg, cloud=None, log=self.logger, args=None)
+                handle("snap", cfg=cfg, cloud=None, log=self.logger, args=None)
 
-        self.assertEqual('HI\nMOM\n', util.load_file(outfile))
+        self.assertEqual("HI\nMOM\n", util.load_file(outfile))
 
-    @mock.patch('cloudinit.config.cc_snap.subp.subp')
+    @mock.patch("cloudinit.config.cc_snap.subp.subp")
     def test_handle_adds_assertions(self, m_subp):
         """Any configured snap assertions are provided to add_assertions."""
-        assert_file = self.tmp_path('snapd.assertions', dir=self.tmp)
-        compare_file = self.tmp_path('comparison', dir=self.tmp)
+        assert_file = self.tmp_path("snapd.assertions", dir=self.tmp)
+        compare_file = self.tmp_path("comparison", dir=self.tmp)
         cfg = {
-            'snap': {'assertions': [SYSTEM_USER_ASSERTION, ACCOUNT_ASSERTION]}}
+            "snap": {"assertions": [SYSTEM_USER_ASSERTION, ACCOUNT_ASSERTION]}
+        }
         wrap_and_call(
-            'cloudinit.config.cc_snap',
-            {'ASSERTIONS_FILE': {'new': assert_file}},
-            handle, 'snap', cfg=cfg, cloud=None, log=self.logger, args=None)
-        content = '\n'.join(cfg['snap']['assertions'])
-        util.write_file(compare_file, content.encode('utf-8'))
+            "cloudinit.config.cc_snap",
+            {"ASSERTIONS_FILE": {"new": assert_file}},
+            handle,
+            "snap",
+            cfg=cfg,
+            cloud=None,
+            log=self.logger,
+            args=None,
+        )
+        content = "\n".join(cfg["snap"]["assertions"])
+        util.write_file(compare_file, content.encode("utf-8"))
         self.assertEqual(
-            util.load_file(compare_file), util.load_file(assert_file))
+            util.load_file(compare_file), util.load_file(assert_file)
+        )
 
-    @mock.patch('cloudinit.config.cc_snap.subp.subp')
+    @mock.patch("cloudinit.config.cc_snap.subp.subp")
     @skipUnlessJsonSchema()
     def test_handle_validates_schema(self, m_subp):
         """Any provided configuration is runs validate_cloudconfig_schema."""
-        assert_file = self.tmp_path('snapd.assertions', dir=self.tmp)
-        cfg = {'snap': {'invalid': ''}}  # Generates schema warning
+        assert_file = self.tmp_path("snapd.assertions", dir=self.tmp)
+        cfg = {"snap": {"invalid": ""}}  # Generates schema warning
         wrap_and_call(
-            'cloudinit.config.cc_snap',
-            {'ASSERTIONS_FILE': {'new': assert_file}},
-            handle, 'snap', cfg=cfg, cloud=None, log=self.logger, args=None)
+            "cloudinit.config.cc_snap",
+            {"ASSERTIONS_FILE": {"new": assert_file}},
+            handle,
+            "snap",
+            cfg=cfg,
+            cloud=None,
+            log=self.logger,
+            args=None,
+        )
         self.assertEqual(
             "WARNING: Invalid config:\nsnap: Additional properties are not"
             " allowed ('invalid' was unexpected)\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
 
 class TestMaybeInstallSquashFuse(CiTestCase):
@@ -517,48 +588,52 @@ class TestMaybeInstallSquashFuse(CiTestCase):
         super(TestMaybeInstallSquashFuse, self).setUp()
         self.tmp = self.tmp_dir()
 
-    @mock.patch('cloudinit.config.cc_snap.util.is_container')
+    @mock.patch("cloudinit.config.cc_snap.util.is_container")
     def test_maybe_install_squashfuse_skips_non_containers(self, m_container):
         """maybe_install_squashfuse does nothing when not on a container."""
         m_container.return_value = False
         maybe_install_squashfuse(cloud=FakeCloud(None))
         self.assertEqual([mock.call()], m_container.call_args_list)
-        self.assertEqual('', self.logs.getvalue())
+        self.assertEqual("", self.logs.getvalue())
 
-    @mock.patch('cloudinit.config.cc_snap.util.is_container')
+    @mock.patch("cloudinit.config.cc_snap.util.is_container")
     def test_maybe_install_squashfuse_raises_install_errors(self, m_container):
         """maybe_install_squashfuse logs and raises package install errors."""
         m_container.return_value = True
         distro = mock.MagicMock()
         distro.update_package_sources.side_effect = RuntimeError(
-            'Some apt error')
+            "Some apt error"
+        )
         with self.assertRaises(RuntimeError) as context_manager:
             maybe_install_squashfuse(cloud=FakeCloud(distro))
-        self.assertEqual('Some apt error', str(context_manager.exception))
-        self.assertIn('Package update failed\nTraceback', self.logs.getvalue())
+        self.assertEqual("Some apt error", str(context_manager.exception))
+        self.assertIn("Package update failed\nTraceback", self.logs.getvalue())
 
-    @mock.patch('cloudinit.config.cc_snap.util.is_container')
+    @mock.patch("cloudinit.config.cc_snap.util.is_container")
     def test_maybe_install_squashfuse_raises_update_errors(self, m_container):
         """maybe_install_squashfuse logs and raises package update errors."""
         m_container.return_value = True
         distro = mock.MagicMock()
         distro.update_package_sources.side_effect = RuntimeError(
-            'Some apt error')
+            "Some apt error"
+        )
         with self.assertRaises(RuntimeError) as context_manager:
             maybe_install_squashfuse(cloud=FakeCloud(distro))
-        self.assertEqual('Some apt error', str(context_manager.exception))
-        self.assertIn('Package update failed\nTraceback', self.logs.getvalue())
+        self.assertEqual("Some apt error", str(context_manager.exception))
+        self.assertIn("Package update failed\nTraceback", self.logs.getvalue())
 
-    @mock.patch('cloudinit.config.cc_snap.util.is_container')
+    @mock.patch("cloudinit.config.cc_snap.util.is_container")
     def test_maybe_install_squashfuse_happy_path(self, m_container):
         """maybe_install_squashfuse logs and raises package install errors."""
         m_container.return_value = True
         distro = mock.MagicMock()  # No errors raised
         maybe_install_squashfuse(cloud=FakeCloud(distro))
         self.assertEqual(
-            [mock.call()], distro.update_package_sources.call_args_list)
+            [mock.call()], distro.update_package_sources.call_args_list
+        )
         self.assertEqual(
-            [mock.call(['squashfuse'])],
-            distro.install_packages.call_args_list)
+            [mock.call(["squashfuse"])], distro.install_packages.call_args_list
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_spacewalk.py b/tests/unittests/config/test_cc_spacewalk.py
index 96efccf0..e1f42968 100644
--- a/tests/unittests/config/test_cc_spacewalk.py
+++ b/tests/unittests/config/test_cc_spacewalk.py
@@ -1,21 +1,20 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.config import cc_spacewalk
-from cloudinit import subp
-
-from tests.unittests import helpers
-
 import logging
 from unittest import mock
 
+from cloudinit import subp
+from cloudinit.config import cc_spacewalk
+from tests.unittests import helpers
+
 LOG = logging.getLogger(__name__)
 
 
 class TestSpacewalk(helpers.TestCase):
     space_cfg = {
-        'spacewalk': {
-            'server': 'localhost',
-            'profile_name': 'test',
+        "spacewalk": {
+            "server": "localhost",
+            "profile_name": "test",
         }
     }
 
@@ -31,12 +30,19 @@ class TestSpacewalk(helpers.TestCase):
 
     @mock.patch("cloudinit.config.cc_spacewalk.subp.subp")
     def test_do_register(self, mock_subp):
-        cc_spacewalk.do_register(**self.space_cfg['spacewalk'])
-        mock_subp.assert_called_with([
-            'rhnreg_ks',
-            '--serverUrl', 'https://localhost/XMLRPC',
-            '--profilename', 'test',
-            '--sslCACert', cc_spacewalk.def_ca_cert_path,
-        ], capture=False)
+        cc_spacewalk.do_register(**self.space_cfg["spacewalk"])
+        mock_subp.assert_called_with(
+            [
+                "rhnreg_ks",
+                "--serverUrl",
+                "https://localhost/XMLRPC",
+                "--profilename",
+                "test",
+                "--sslCACert",
+                cc_spacewalk.def_ca_cert_path,
+            ],
+            capture=False,
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_ssh.py b/tests/unittests/config/test_cc_ssh.py
index ba179bbf..d66cc4cb 100644
--- a/tests/unittests/config/test_cc_ssh.py
+++ b/tests/unittests/config/test_cc_ssh.py
@@ -1,17 +1,18 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
+import logging
 import os.path
 
-from cloudinit.config import cc_ssh
 from cloudinit import ssh_util
+from cloudinit.config import cc_ssh
 from tests.unittests.helpers import CiTestCase, mock
-import logging
 
 LOG = logging.getLogger(__name__)
 
 MODPATH = "cloudinit.config.cc_ssh."
-KEY_NAMES_NO_DSA = [name for name in cc_ssh.GENERATE_KEY_NAMES
-                    if name not in 'dsa']
+KEY_NAMES_NO_DSA = [
+    name for name in cc_ssh.GENERATE_KEY_NAMES if name not in "dsa"
+]
 
 
 @mock.patch(MODPATH + "ssh_util.setup_user_keys")
@@ -20,39 +21,45 @@ class TestHandleSsh(CiTestCase):
 
     def _publish_hostkey_test_setup(self):
         self.test_hostkeys = {
-            'dsa': ('ssh-dss', 'AAAAB3NzaC1kc3MAAACB'),
-            'ecdsa': ('ecdsa-sha2-nistp256', 'AAAAE2VjZ'),
-            'ed25519': ('ssh-ed25519', 'AAAAC3NzaC1lZDI'),
-            'rsa': ('ssh-rsa', 'AAAAB3NzaC1yc2EAAA'),
+            "dsa": ("ssh-dss", "AAAAB3NzaC1kc3MAAACB"),
+            "ecdsa": ("ecdsa-sha2-nistp256", "AAAAE2VjZ"),
+            "ed25519": ("ssh-ed25519", "AAAAC3NzaC1lZDI"),
+            "rsa": ("ssh-rsa", "AAAAB3NzaC1yc2EAAA"),
         }
         self.test_hostkey_files = []
         hostkey_tmpdir = self.tmp_dir()
         for key_type in cc_ssh.GENERATE_KEY_NAMES:
             key_data = self.test_hostkeys[key_type]
-            filename = 'ssh_host_%s_key.pub' % key_type
+            filename = "ssh_host_%s_key.pub" % key_type
             filepath = os.path.join(hostkey_tmpdir, filename)
             self.test_hostkey_files.append(filepath)
-            with open(filepath, 'w') as f:
-                f.write(' '.join(key_data))
+            with open(filepath, "w") as f:
+                f.write(" ".join(key_data))
 
-        cc_ssh.KEY_FILE_TPL = os.path.join(hostkey_tmpdir, 'ssh_host_%s_key')
+        cc_ssh.KEY_FILE_TPL = os.path.join(hostkey_tmpdir, "ssh_host_%s_key")
 
     def test_apply_credentials_with_user(self, m_setup_keys):
         """Apply keys for the given user and root."""
         keys = ["key1"]
         user = "clouduser"
         cc_ssh.apply_credentials(keys, user, False, ssh_util.DISABLE_USER_OPTS)
-        self.assertEqual([mock.call(set(keys), user),
-                          mock.call(set(keys), "root", options="")],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [
+                mock.call(set(keys), user),
+                mock.call(set(keys), "root", options=""),
+            ],
+            m_setup_keys.call_args_list,
+        )
 
     def test_apply_credentials_with_no_user(self, m_setup_keys):
         """Apply keys for root only."""
         keys = ["key1"]
         user = None
         cc_ssh.apply_credentials(keys, user, False, ssh_util.DISABLE_USER_OPTS)
-        self.assertEqual([mock.call(set(keys), "root", options="")],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [mock.call(set(keys), "root", options="")],
+            m_setup_keys.call_args_list,
+        )
 
     def test_apply_credentials_with_user_disable_root(self, m_setup_keys):
         """Apply keys for the given user and disable root ssh."""
@@ -62,9 +69,13 @@ class TestHandleSsh(CiTestCase):
         cc_ssh.apply_credentials(keys, user, True, options)
         options = options.replace("$USER", user)
         options = options.replace("$DISABLE_USER", "root")
-        self.assertEqual([mock.call(set(keys), user),
-                          mock.call(set(keys), "root", options=options)],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [
+                mock.call(set(keys), user),
+                mock.call(set(keys), "root", options=options),
+            ],
+            m_setup_keys.call_args_list,
+        )
 
     def test_apply_credentials_with_no_user_disable_root(self, m_setup_keys):
         """Apply keys no user and disable root ssh."""
@@ -74,14 +85,15 @@ class TestHandleSsh(CiTestCase):
         cc_ssh.apply_credentials(keys, user, True, options)
         options = options.replace("$USER", "NONE")
         options = options.replace("$DISABLE_USER", "root")
-        self.assertEqual([mock.call(set(keys), "root", options=options)],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [mock.call(set(keys), "root", options=options)],
+            m_setup_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
-    def test_handle_no_cfg(self, m_path_exists, m_nug,
-                           m_glob, m_setup_keys):
+    def test_handle_no_cfg(self, m_path_exists, m_nug, m_glob, m_setup_keys):
         """Test handle with no config ignores generating existing keyfiles."""
         cfg = {}
         keys = ["key1"]
@@ -90,28 +102,33 @@ class TestHandleSsh(CiTestCase):
         m_path_exists.return_value = True
         m_nug.return_value = ([], {})
         cc_ssh.PUBLISH_HOST_KEYS = False
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cc_ssh.handle("name", cfg, cloud, LOG, None)
         options = ssh_util.DISABLE_USER_OPTS.replace("$USER", "NONE")
         options = options.replace("$DISABLE_USER", "root")
-        m_glob.assert_called_once_with('/etc/ssh/ssh_host_*key*')
+        m_glob.assert_called_once_with("/etc/ssh/ssh_host_*key*")
         self.assertIn(
-            [mock.call('/etc/ssh/ssh_host_rsa_key'),
-             mock.call('/etc/ssh/ssh_host_dsa_key'),
-             mock.call('/etc/ssh/ssh_host_ecdsa_key'),
-             mock.call('/etc/ssh/ssh_host_ed25519_key')],
-            m_path_exists.call_args_list)
-        self.assertEqual([mock.call(set(keys), "root", options=options)],
-                         m_setup_keys.call_args_list)
+            [
+                mock.call("/etc/ssh/ssh_host_rsa_key"),
+                mock.call("/etc/ssh/ssh_host_dsa_key"),
+                mock.call("/etc/ssh/ssh_host_ecdsa_key"),
+                mock.call("/etc/ssh/ssh_host_ed25519_key"),
+            ],
+            m_path_exists.call_args_list,
+        )
+        self.assertEqual(
+            [mock.call(set(keys), "root", options=options)],
+            m_setup_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
-    def test_dont_allow_public_ssh_keys(self, m_path_exists, m_nug,
-                                        m_glob, m_setup_keys):
+    def test_dont_allow_public_ssh_keys(
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test allow_public_ssh_keys=False ignores ssh public keys from
-           platform.
+        platform.
         """
         cfg = {"allow_public_ssh_keys": False}
         keys = ["key1"]
@@ -120,21 +137,25 @@ class TestHandleSsh(CiTestCase):
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cc_ssh.handle("name", cfg, cloud, LOG, None)
 
         options = ssh_util.DISABLE_USER_OPTS.replace("$USER", user)
         options = options.replace("$DISABLE_USER", "root")
-        self.assertEqual([mock.call(set(), user),
-                          mock.call(set(), "root", options=options)],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [
+                mock.call(set(), user),
+                mock.call(set(), "root", options=options),
+            ],
+            m_setup_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
-    def test_handle_no_cfg_and_default_root(self, m_path_exists, m_nug,
-                                            m_glob, m_setup_keys):
+    def test_handle_no_cfg_and_default_root(
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with no config and a default distro user."""
         cfg = {}
         keys = ["key1"]
@@ -143,21 +164,25 @@ class TestHandleSsh(CiTestCase):
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cc_ssh.handle("name", cfg, cloud, LOG, None)
 
         options = ssh_util.DISABLE_USER_OPTS.replace("$USER", user)
         options = options.replace("$DISABLE_USER", "root")
-        self.assertEqual([mock.call(set(keys), user),
-                          mock.call(set(keys), "root", options=options)],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [
+                mock.call(set(keys), user),
+                mock.call(set(keys), "root", options=options),
+            ],
+            m_setup_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
-    def test_handle_cfg_with_explicit_disable_root(self, m_path_exists, m_nug,
-                                                   m_glob, m_setup_keys):
+    def test_handle_cfg_with_explicit_disable_root(
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with explicit disable_root and a default distro user."""
         # This test is identical to test_handle_no_cfg_and_default_root,
         # except this uses an explicit cfg value
@@ -168,21 +193,25 @@ class TestHandleSsh(CiTestCase):
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cc_ssh.handle("name", cfg, cloud, LOG, None)
 
         options = ssh_util.DISABLE_USER_OPTS.replace("$USER", user)
         options = options.replace("$DISABLE_USER", "root")
-        self.assertEqual([mock.call(set(keys), user),
-                          mock.call(set(keys), "root", options=options)],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [
+                mock.call(set(keys), user),
+                mock.call(set(keys), "root", options=options),
+            ],
+            m_setup_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
-    def test_handle_cfg_without_disable_root(self, m_path_exists, m_nug,
-                                             m_glob, m_setup_keys):
+    def test_handle_cfg_without_disable_root(
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with disable_root == False."""
         # When disable_root == False, the ssh redirect for root is skipped
         cfg = {"disable_root": False}
@@ -192,96 +221,111 @@ class TestHandleSsh(CiTestCase):
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cloud.get_public_ssh_keys = mock.Mock(return_value=keys)
         cc_ssh.handle("name", cfg, cloud, LOG, None)
 
-        self.assertEqual([mock.call(set(keys), user),
-                          mock.call(set(keys), "root", options="")],
-                         m_setup_keys.call_args_list)
+        self.assertEqual(
+            [
+                mock.call(set(keys), user),
+                mock.call(set(keys), "root", options=""),
+            ],
+            m_setup_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
     def test_handle_publish_hostkeys_default(
-            self, m_path_exists, m_nug, m_glob, m_setup_keys):
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with various configs for ssh_publish_hostkeys."""
         self._publish_hostkey_test_setup()
         cc_ssh.PUBLISH_HOST_KEYS = True
         keys = ["key1"]
         user = "clouduser"
         # Return no matching keys for first glob, test keys for second.
-        m_glob.side_effect = iter([
-                                  [],
-                                  self.test_hostkey_files,
-                                  ])
+        m_glob.side_effect = iter(
+            [
+                [],
+                self.test_hostkey_files,
+            ]
+        )
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cloud.datasource.publish_host_keys = mock.Mock()
 
         cfg = {}
-        expected_call = [self.test_hostkeys[key_type] for key_type
-                         in KEY_NAMES_NO_DSA]
+        expected_call = [
+            self.test_hostkeys[key_type] for key_type in KEY_NAMES_NO_DSA
+        ]
         cc_ssh.handle("name", cfg, cloud, LOG, None)
-        self.assertEqual([mock.call(expected_call)],
-                         cloud.datasource.publish_host_keys.call_args_list)
+        self.assertEqual(
+            [mock.call(expected_call)],
+            cloud.datasource.publish_host_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
     def test_handle_publish_hostkeys_config_enable(
-            self, m_path_exists, m_nug, m_glob, m_setup_keys):
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with various configs for ssh_publish_hostkeys."""
         self._publish_hostkey_test_setup()
         cc_ssh.PUBLISH_HOST_KEYS = False
         keys = ["key1"]
         user = "clouduser"
         # Return no matching keys for first glob, test keys for second.
-        m_glob.side_effect = iter([
-                                  [],
-                                  self.test_hostkey_files,
-                                  ])
+        m_glob.side_effect = iter(
+            [
+                [],
+                self.test_hostkey_files,
+            ]
+        )
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cloud.datasource.publish_host_keys = mock.Mock()
 
-        cfg = {'ssh_publish_hostkeys': {'enabled': True}}
-        expected_call = [self.test_hostkeys[key_type] for key_type
-                         in KEY_NAMES_NO_DSA]
+        cfg = {"ssh_publish_hostkeys": {"enabled": True}}
+        expected_call = [
+            self.test_hostkeys[key_type] for key_type in KEY_NAMES_NO_DSA
+        ]
         cc_ssh.handle("name", cfg, cloud, LOG, None)
-        self.assertEqual([mock.call(expected_call)],
-                         cloud.datasource.publish_host_keys.call_args_list)
+        self.assertEqual(
+            [mock.call(expected_call)],
+            cloud.datasource.publish_host_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
     def test_handle_publish_hostkeys_config_disable(
-            self, m_path_exists, m_nug, m_glob, m_setup_keys):
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with various configs for ssh_publish_hostkeys."""
         self._publish_hostkey_test_setup()
         cc_ssh.PUBLISH_HOST_KEYS = True
         keys = ["key1"]
         user = "clouduser"
         # Return no matching keys for first glob, test keys for second.
-        m_glob.side_effect = iter([
-                                  [],
-                                  self.test_hostkey_files,
-                                  ])
+        m_glob.side_effect = iter(
+            [
+                [],
+                self.test_hostkey_files,
+            ]
+        )
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cloud.datasource.publish_host_keys = mock.Mock()
 
-        cfg = {'ssh_publish_hostkeys': {'enabled': False}}
+        cfg = {"ssh_publish_hostkeys": {"enabled": False}}
         cc_ssh.handle("name", cfg, cloud, LOG, None)
         self.assertFalse(cloud.datasource.publish_host_keys.call_args_list)
         cloud.datasource.publish_host_keys.assert_not_called()
@@ -290,61 +334,75 @@ class TestHandleSsh(CiTestCase):
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
     def test_handle_publish_hostkeys_config_blacklist(
-            self, m_path_exists, m_nug, m_glob, m_setup_keys):
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with various configs for ssh_publish_hostkeys."""
         self._publish_hostkey_test_setup()
         cc_ssh.PUBLISH_HOST_KEYS = True
         keys = ["key1"]
         user = "clouduser"
         # Return no matching keys for first glob, test keys for second.
-        m_glob.side_effect = iter([
-                                  [],
-                                  self.test_hostkey_files,
-                                  ])
+        m_glob.side_effect = iter(
+            [
+                [],
+                self.test_hostkey_files,
+            ]
+        )
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cloud.datasource.publish_host_keys = mock.Mock()
 
-        cfg = {'ssh_publish_hostkeys': {'enabled': True,
-                                        'blacklist': ['dsa', 'rsa']}}
-        expected_call = [self.test_hostkeys[key_type] for key_type
-                         in ['ecdsa', 'ed25519']]
+        cfg = {
+            "ssh_publish_hostkeys": {
+                "enabled": True,
+                "blacklist": ["dsa", "rsa"],
+            }
+        }
+        expected_call = [
+            self.test_hostkeys[key_type] for key_type in ["ecdsa", "ed25519"]
+        ]
         cc_ssh.handle("name", cfg, cloud, LOG, None)
-        self.assertEqual([mock.call(expected_call)],
-                         cloud.datasource.publish_host_keys.call_args_list)
+        self.assertEqual(
+            [mock.call(expected_call)],
+            cloud.datasource.publish_host_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "glob.glob")
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "os.path.exists")
     def test_handle_publish_hostkeys_empty_blacklist(
-            self, m_path_exists, m_nug, m_glob, m_setup_keys):
+        self, m_path_exists, m_nug, m_glob, m_setup_keys
+    ):
         """Test handle with various configs for ssh_publish_hostkeys."""
         self._publish_hostkey_test_setup()
         cc_ssh.PUBLISH_HOST_KEYS = True
         keys = ["key1"]
         user = "clouduser"
         # Return no matching keys for first glob, test keys for second.
-        m_glob.side_effect = iter([
-                                  [],
-                                  self.test_hostkey_files,
-                                  ])
+        m_glob.side_effect = iter(
+            [
+                [],
+                self.test_hostkey_files,
+            ]
+        )
         # Mock os.path.exits to True to short-circuit the key writing logic
         m_path_exists.return_value = True
         m_nug.return_value = ({user: {"default": user}}, {})
-        cloud = self.tmp_cloud(
-            distro='ubuntu', metadata={'public-keys': keys})
+        cloud = self.tmp_cloud(distro="ubuntu", metadata={"public-keys": keys})
         cloud.datasource.publish_host_keys = mock.Mock()
 
-        cfg = {'ssh_publish_hostkeys': {'enabled': True,
-                                        'blacklist': []}}
-        expected_call = [self.test_hostkeys[key_type] for key_type
-                         in cc_ssh.GENERATE_KEY_NAMES]
+        cfg = {"ssh_publish_hostkeys": {"enabled": True, "blacklist": []}}
+        expected_call = [
+            self.test_hostkeys[key_type]
+            for key_type in cc_ssh.GENERATE_KEY_NAMES
+        ]
         cc_ssh.handle("name", cfg, cloud, LOG, None)
-        self.assertEqual([mock.call(expected_call)],
-                         cloud.datasource.publish_host_keys.call_args_list)
+        self.assertEqual(
+            [mock.call(expected_call)],
+            cloud.datasource.publish_host_keys.call_args_list,
+        )
 
     @mock.patch(MODPATH + "ug_util.normalize_users_groups")
     @mock.patch(MODPATH + "util.write_file")
@@ -369,36 +427,40 @@ class TestHandleSsh(CiTestCase):
             cfg["ssh_keys"][public_name] = public_value
             cfg["ssh_keys"][cert_name] = cert_value
 
-            expected_calls.extend([
-                mock.call(
-                    '/etc/ssh/ssh_host_{}_key'.format(key_type),
-                    private_value,
-                    384
-                ),
-                mock.call(
-                    '/etc/ssh/ssh_host_{}_key.pub'.format(key_type),
-                    public_value,
-                    384
-                ),
-                mock.call(
-                    '/etc/ssh/ssh_host_{}_key-cert.pub'.format(key_type),
-                    cert_value,
-                    384
-                ),
-                mock.call(
-                    '/etc/ssh/sshd_config',
-                    ('HostCertificate /etc/ssh/ssh_host_{}_key-cert.pub'
-                     '\n'.format(key_type)),
-                    preserve_mode=True
-                )
-            ])
+            expected_calls.extend(
+                [
+                    mock.call(
+                        "/etc/ssh/ssh_host_{}_key".format(key_type),
+                        private_value,
+                        384,
+                    ),
+                    mock.call(
+                        "/etc/ssh/ssh_host_{}_key.pub".format(key_type),
+                        public_value,
+                        384,
+                    ),
+                    mock.call(
+                        "/etc/ssh/ssh_host_{}_key-cert.pub".format(key_type),
+                        cert_value,
+                        384,
+                    ),
+                    mock.call(
+                        "/etc/ssh/sshd_config",
+                        "HostCertificate /etc/ssh/ssh_host_{}_key-cert.pub"
+                        "\n".format(key_type),
+                        preserve_mode=True,
+                    ),
+                ]
+            )
 
         # Run the handler.
         m_nug.return_value = ([], {})
-        with mock.patch(MODPATH + 'ssh_util.parse_ssh_config',
-                        return_value=[]):
-            cc_ssh.handle("name", cfg, self.tmp_cloud(distro='ubuntu'),
-                          LOG, None)
+        with mock.patch(
+            MODPATH + "ssh_util.parse_ssh_config", return_value=[]
+        ):
+            cc_ssh.handle(
+                "name", cfg, self.tmp_cloud(distro="ubuntu"), LOG, None
+            )
 
         # Check that all expected output has been done.
         for call_ in expected_calls:
diff --git a/tests/unittests/config/test_cc_timezone.py b/tests/unittests/config/test_cc_timezone.py
index fb6aab5f..f76397b7 100644
--- a/tests/unittests/config/test_cc_timezone.py
+++ b/tests/unittests/config/test_cc_timezone.py
@@ -4,19 +4,16 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.config import cc_timezone
-
-from cloudinit import util
-
-
 import logging
 import shutil
 import tempfile
-from configobj import ConfigObj
 from io import BytesIO
 
-from tests.unittests import helpers as t_help
+from configobj import ConfigObj
 
+from cloudinit import util
+from cloudinit.config import cc_timezone
+from tests.unittests import helpers as t_help
 from tests.unittests.util import get_cloud
 
 LOG = logging.getLogger(__name__)
@@ -33,22 +30,24 @@ class TestTimezone(t_help.FilesystemMockingTestCase):
     def test_set_timezone_sles(self):
 
         cfg = {
-            'timezone': 'Tatooine/Bestine',
+            "timezone": "Tatooine/Bestine",
         }
-        cc = get_cloud('sles')
+        cc = get_cloud("sles")
 
         # Create a dummy timezone file
-        dummy_contents = '0123456789abcdefgh'
-        util.write_file('/usr/share/zoneinfo/%s' % cfg['timezone'],
-                        dummy_contents)
+        dummy_contents = "0123456789abcdefgh"
+        util.write_file(
+            "/usr/share/zoneinfo/%s" % cfg["timezone"], dummy_contents
+        )
 
-        cc_timezone.handle('cc_timezone', cfg, cc, LOG, [])
+        cc_timezone.handle("cc_timezone", cfg, cc, LOG, [])
 
-        contents = util.load_file('/etc/sysconfig/clock', decode=False)
+        contents = util.load_file("/etc/sysconfig/clock", decode=False)
         n_cfg = ConfigObj(BytesIO(contents))
-        self.assertEqual({'TIMEZONE': cfg['timezone']}, dict(n_cfg))
+        self.assertEqual({"TIMEZONE": cfg["timezone"]}, dict(n_cfg))
 
-        contents = util.load_file('/etc/localtime')
+        contents = util.load_file("/etc/localtime")
         self.assertEqual(dummy_contents, contents.strip())
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_ubuntu_advantage.py b/tests/unittests/config/test_cc_ubuntu_advantage.py
index 8d0c9665..d7519a1b 100644
--- a/tests/unittests/config/test_cc_ubuntu_advantage.py
+++ b/tests/unittests/config/test_cc_ubuntu_advantage.py
@@ -1,15 +1,22 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
+from cloudinit import subp
 from cloudinit.config.cc_ubuntu_advantage import (
-    configure_ua, handle, maybe_install_ua_tools, schema)
+    configure_ua,
+    handle,
+    maybe_install_ua_tools,
+    schema,
+)
 from cloudinit.config.schema import validate_cloudconfig_schema
-from cloudinit import subp
 from tests.unittests.helpers import (
-    CiTestCase, mock, SchemaTestCaseMixin, skipUnlessJsonSchema)
-
+    CiTestCase,
+    SchemaTestCaseMixin,
+    mock,
+    skipUnlessJsonSchema,
+)
 
 # Module path used in mocks
-MPATH = 'cloudinit.config.cc_ubuntu_advantage'
+MPATH = "cloudinit.config.cc_ubuntu_advantage"
 
 
 class FakeCloud(object):
@@ -26,111 +33,131 @@ class TestConfigureUA(CiTestCase):
         super(TestConfigureUA, self).setUp()
         self.tmp = self.tmp_dir()
 
-    @mock.patch('%s.subp.subp' % MPATH)
+    @mock.patch("%s.subp.subp" % MPATH)
     def test_configure_ua_attach_error(self, m_subp):
         """Errors from ua attach command are raised."""
         m_subp.side_effect = subp.ProcessExecutionError(
-            'Invalid token SomeToken')
+            "Invalid token SomeToken"
+        )
         with self.assertRaises(RuntimeError) as context_manager:
-            configure_ua(token='SomeToken')
+            configure_ua(token="SomeToken")
         self.assertEqual(
-            'Failure attaching Ubuntu Advantage:\nUnexpected error while'
-            ' running command.\nCommand: -\nExit code: -\nReason: -\n'
-            'Stdout: Invalid token SomeToken\nStderr: -',
-            str(context_manager.exception))
+            "Failure attaching Ubuntu Advantage:\nUnexpected error while"
+            " running command.\nCommand: -\nExit code: -\nReason: -\n"
+            "Stdout: Invalid token SomeToken\nStderr: -",
+            str(context_manager.exception),
+        )
 
-    @mock.patch('%s.subp.subp' % MPATH)
+    @mock.patch("%s.subp.subp" % MPATH)
     def test_configure_ua_attach_with_token(self, m_subp):
         """When token is provided, attach the machine to ua using the token."""
-        configure_ua(token='SomeToken')
-        m_subp.assert_called_once_with(['ua', 'attach', 'SomeToken'])
+        configure_ua(token="SomeToken")
+        m_subp.assert_called_once_with(["ua", "attach", "SomeToken"])
         self.assertEqual(
-            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
-            self.logs.getvalue())
+            "DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('%s.subp.subp' % MPATH)
+    @mock.patch("%s.subp.subp" % MPATH)
     def test_configure_ua_attach_on_service_error(self, m_subp):
         """all services should be enabled and then any failures raised"""
 
         def fake_subp(cmd, capture=None):
-            fail_cmds = [['ua', 'enable', svc] for svc in ['esm', 'cc']]
+            fail_cmds = [["ua", "enable", svc] for svc in ["esm", "cc"]]
             if cmd in fail_cmds and capture:
                 svc = cmd[-1]
                 raise subp.ProcessExecutionError(
-                    'Invalid {} credentials'.format(svc.upper()))
+                    "Invalid {} credentials".format(svc.upper())
+                )
 
         m_subp.side_effect = fake_subp
 
         with self.assertRaises(RuntimeError) as context_manager:
-            configure_ua(token='SomeToken', enable=['esm', 'cc', 'fips'])
+            configure_ua(token="SomeToken", enable=["esm", "cc", "fips"])
         self.assertEqual(
             m_subp.call_args_list,
-            [mock.call(['ua', 'attach', 'SomeToken']),
-             mock.call(['ua', 'enable', 'esm'], capture=True),
-             mock.call(['ua', 'enable', 'cc'], capture=True),
-             mock.call(['ua', 'enable', 'fips'], capture=True)])
+            [
+                mock.call(["ua", "attach", "SomeToken"]),
+                mock.call(["ua", "enable", "esm"], capture=True),
+                mock.call(["ua", "enable", "cc"], capture=True),
+                mock.call(["ua", "enable", "fips"], capture=True),
+            ],
+        )
         self.assertIn(
             'WARNING: Failure enabling "esm":\nUnexpected error'
-            ' while running command.\nCommand: -\nExit code: -\nReason: -\n'
-            'Stdout: Invalid ESM credentials\nStderr: -\n',
-            self.logs.getvalue())
+            " while running command.\nCommand: -\nExit code: -\nReason: -\n"
+            "Stdout: Invalid ESM credentials\nStderr: -\n",
+            self.logs.getvalue(),
+        )
         self.assertIn(
             'WARNING: Failure enabling "cc":\nUnexpected error'
-            ' while running command.\nCommand: -\nExit code: -\nReason: -\n'
-            'Stdout: Invalid CC credentials\nStderr: -\n',
-            self.logs.getvalue())
+            " while running command.\nCommand: -\nExit code: -\nReason: -\n"
+            "Stdout: Invalid CC credentials\nStderr: -\n",
+            self.logs.getvalue(),
+        )
         self.assertEqual(
             'Failure enabling Ubuntu Advantage service(s): "esm", "cc"',
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
-    @mock.patch('%s.subp.subp' % MPATH)
+    @mock.patch("%s.subp.subp" % MPATH)
     def test_configure_ua_attach_with_empty_services(self, m_subp):
         """When services is an empty list, do not auto-enable attach."""
-        configure_ua(token='SomeToken', enable=[])
-        m_subp.assert_called_once_with(['ua', 'attach', 'SomeToken'])
+        configure_ua(token="SomeToken", enable=[])
+        m_subp.assert_called_once_with(["ua", "attach", "SomeToken"])
         self.assertEqual(
-            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
-            self.logs.getvalue())
+            "DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('%s.subp.subp' % MPATH)
+    @mock.patch("%s.subp.subp" % MPATH)
     def test_configure_ua_attach_with_specific_services(self, m_subp):
         """When services a list, only enable specific services."""
-        configure_ua(token='SomeToken', enable=['fips'])
+        configure_ua(token="SomeToken", enable=["fips"])
         self.assertEqual(
             m_subp.call_args_list,
-            [mock.call(['ua', 'attach', 'SomeToken']),
-             mock.call(['ua', 'enable', 'fips'], capture=True)])
+            [
+                mock.call(["ua", "attach", "SomeToken"]),
+                mock.call(["ua", "enable", "fips"], capture=True),
+            ],
+        )
         self.assertEqual(
-            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
-            self.logs.getvalue())
+            "DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH, mock.MagicMock())
-    @mock.patch('%s.subp.subp' % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH, mock.MagicMock())
+    @mock.patch("%s.subp.subp" % MPATH)
     def test_configure_ua_attach_with_string_services(self, m_subp):
         """When services a string, treat as singleton list and warn"""
-        configure_ua(token='SomeToken', enable='fips')
+        configure_ua(token="SomeToken", enable="fips")
         self.assertEqual(
             m_subp.call_args_list,
-            [mock.call(['ua', 'attach', 'SomeToken']),
-             mock.call(['ua', 'enable', 'fips'], capture=True)])
+            [
+                mock.call(["ua", "attach", "SomeToken"]),
+                mock.call(["ua", "enable", "fips"], capture=True),
+            ],
+        )
         self.assertEqual(
-            'WARNING: ubuntu_advantage: enable should be a list, not a'
-            ' string; treating as a single enable\n'
-            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
-            self.logs.getvalue())
+            "WARNING: ubuntu_advantage: enable should be a list, not a"
+            " string; treating as a single enable\n"
+            "DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('%s.subp.subp' % MPATH)
+    @mock.patch("%s.subp.subp" % MPATH)
     def test_configure_ua_attach_with_weird_services(self, m_subp):
         """When services not string or list, warn but still attach"""
-        configure_ua(token='SomeToken', enable={'deffo': 'wont work'})
+        configure_ua(token="SomeToken", enable={"deffo": "wont work"})
         self.assertEqual(
-            m_subp.call_args_list,
-            [mock.call(['ua', 'attach', 'SomeToken'])])
+            m_subp.call_args_list, [mock.call(["ua", "attach", "SomeToken"])]
+        )
         self.assertEqual(
-            'WARNING: ubuntu_advantage: enable should be a list, not a'
-            ' dict; skipping enabling services\n'
-            'DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n',
-            self.logs.getvalue())
+            "WARNING: ubuntu_advantage: enable should be a list, not a"
+            " dict; skipping enabling services\n"
+            "DEBUG: Attaching to Ubuntu Advantage. ua attach SomeToken\n",
+            self.logs.getvalue(),
+        )
 
 
 @skipUnlessJsonSchema()
@@ -139,49 +166,57 @@ class TestSchema(CiTestCase, SchemaTestCaseMixin):
     with_logs = True
     schema = schema
 
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
-    @mock.patch('%s.configure_ua' % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH)
+    @mock.patch("%s.configure_ua" % MPATH)
     def test_schema_warns_on_ubuntu_advantage_not_dict(self, _cfg, _):
         """If ubuntu_advantage configuration is not a dict, emit a warning."""
-        validate_cloudconfig_schema({'ubuntu_advantage': 'wrong type'}, schema)
+        validate_cloudconfig_schema({"ubuntu_advantage": "wrong type"}, schema)
         self.assertEqual(
             "WARNING: Invalid config:\nubuntu_advantage: 'wrong type' is not"
             " of type 'object'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
-    @mock.patch('%s.configure_ua' % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH)
+    @mock.patch("%s.configure_ua" % MPATH)
     def test_schema_disallows_unknown_keys(self, _cfg, _):
         """Unknown keys in ubuntu_advantage configuration emit warnings."""
         validate_cloudconfig_schema(
-            {'ubuntu_advantage': {'token': 'winner', 'invalid-key': ''}},
-            schema)
+            {"ubuntu_advantage": {"token": "winner", "invalid-key": ""}},
+            schema,
+        )
         self.assertIn(
-            'WARNING: Invalid config:\nubuntu_advantage: Additional properties'
+            "WARNING: Invalid config:\nubuntu_advantage: Additional properties"
             " are not allowed ('invalid-key' was unexpected)",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
-    @mock.patch('%s.configure_ua' % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH)
+    @mock.patch("%s.configure_ua" % MPATH)
     def test_warn_schema_requires_token(self, _cfg, _):
         """Warn if ubuntu_advantage configuration lacks token."""
         validate_cloudconfig_schema(
-            {'ubuntu_advantage': {'enable': ['esm']}}, schema)
+            {"ubuntu_advantage": {"enable": ["esm"]}}, schema
+        )
         self.assertEqual(
             "WARNING: Invalid config:\nubuntu_advantage:"
-            " 'token' is a required property\n", self.logs.getvalue())
+            " 'token' is a required property\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
-    @mock.patch('%s.configure_ua' % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH)
+    @mock.patch("%s.configure_ua" % MPATH)
     def test_warn_schema_services_is_not_list_or_dict(self, _cfg, _):
         """Warn when ubuntu_advantage:enable config is not a list."""
         validate_cloudconfig_schema(
-            {'ubuntu_advantage': {'enable': 'needslist'}}, schema)
+            {"ubuntu_advantage": {"enable": "needslist"}}, schema
+        )
         self.assertEqual(
             "WARNING: Invalid config:\nubuntu_advantage: 'token' is a"
             " required property\nubuntu_advantage.enable: 'needslist'"
             " is not of type 'array'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
 
 class TestHandle(CiTestCase):
@@ -192,89 +227,93 @@ class TestHandle(CiTestCase):
         super(TestHandle, self).setUp()
         self.tmp = self.tmp_dir()
 
-    @mock.patch('%s.validate_cloudconfig_schema' % MPATH)
+    @mock.patch("%s.validate_cloudconfig_schema" % MPATH)
     def test_handle_no_config(self, m_schema):
         """When no ua-related configuration is provided, nothing happens."""
         cfg = {}
-        handle('ua-test', cfg=cfg, cloud=None, log=self.logger, args=None)
+        handle("ua-test", cfg=cfg, cloud=None, log=self.logger, args=None)
         self.assertIn(
             "DEBUG: Skipping module named ua-test, no 'ubuntu_advantage'"
-            ' configuration found',
-            self.logs.getvalue())
+            " configuration found",
+            self.logs.getvalue(),
+        )
         m_schema.assert_not_called()
 
-    @mock.patch('%s.configure_ua' % MPATH)
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
+    @mock.patch("%s.configure_ua" % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH)
     def test_handle_tries_to_install_ubuntu_advantage_tools(
-            self, m_install, m_cfg):
+        self, m_install, m_cfg
+    ):
         """If ubuntu_advantage is provided, try installing ua-tools package."""
-        cfg = {'ubuntu_advantage': {'token': 'valid'}}
+        cfg = {"ubuntu_advantage": {"token": "valid"}}
         mycloud = FakeCloud(None)
-        handle('nomatter', cfg=cfg, cloud=mycloud, log=self.logger, args=None)
+        handle("nomatter", cfg=cfg, cloud=mycloud, log=self.logger, args=None)
         m_install.assert_called_once_with(mycloud)
 
-    @mock.patch('%s.configure_ua' % MPATH)
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH)
+    @mock.patch("%s.configure_ua" % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH)
     def test_handle_passes_credentials_and_services_to_configure_ua(
-            self, m_install, m_configure_ua):
+        self, m_install, m_configure_ua
+    ):
         """All ubuntu_advantage config keys are passed to configure_ua."""
-        cfg = {'ubuntu_advantage': {'token': 'token', 'enable': ['esm']}}
-        handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
-        m_configure_ua.assert_called_once_with(
-            token='token', enable=['esm'])
+        cfg = {"ubuntu_advantage": {"token": "token", "enable": ["esm"]}}
+        handle("nomatter", cfg=cfg, cloud=None, log=self.logger, args=None)
+        m_configure_ua.assert_called_once_with(token="token", enable=["esm"])
 
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH, mock.MagicMock())
-    @mock.patch('%s.configure_ua' % MPATH)
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH, mock.MagicMock())
+    @mock.patch("%s.configure_ua" % MPATH)
     def test_handle_warns_on_deprecated_ubuntu_advantage_key_w_config(
-            self, m_configure_ua):
+        self, m_configure_ua
+    ):
         """Warning when ubuntu-advantage key is present with new config"""
-        cfg = {'ubuntu-advantage': {'token': 'token', 'enable': ['esm']}}
-        handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
+        cfg = {"ubuntu-advantage": {"token": "token", "enable": ["esm"]}}
+        handle("nomatter", cfg=cfg, cloud=None, log=self.logger, args=None)
         self.assertEqual(
             'WARNING: Deprecated configuration key "ubuntu-advantage"'
             ' provided. Expected underscore delimited "ubuntu_advantage";'
-            ' will attempt to continue.',
-            self.logs.getvalue().splitlines()[0])
-        m_configure_ua.assert_called_once_with(
-            token='token', enable=['esm'])
+            " will attempt to continue.",
+            self.logs.getvalue().splitlines()[0],
+        )
+        m_configure_ua.assert_called_once_with(token="token", enable=["esm"])
 
     def test_handle_error_on_deprecated_commands_key_dashed(self):
         """Error when commands is present in ubuntu-advantage key."""
-        cfg = {'ubuntu-advantage': {'commands': 'nogo'}}
+        cfg = {"ubuntu-advantage": {"commands": "nogo"}}
         with self.assertRaises(RuntimeError) as context_manager:
-            handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
+            handle("nomatter", cfg=cfg, cloud=None, log=self.logger, args=None)
         self.assertEqual(
             'Deprecated configuration "ubuntu-advantage: commands" provided.'
             ' Expected "token"',
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
     def test_handle_error_on_deprecated_commands_key_underscored(self):
         """Error when commands is present in ubuntu_advantage key."""
-        cfg = {'ubuntu_advantage': {'commands': 'nogo'}}
+        cfg = {"ubuntu_advantage": {"commands": "nogo"}}
         with self.assertRaises(RuntimeError) as context_manager:
-            handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
+            handle("nomatter", cfg=cfg, cloud=None, log=self.logger, args=None)
         self.assertEqual(
             'Deprecated configuration "ubuntu-advantage: commands" provided.'
             ' Expected "token"',
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
-    @mock.patch('%s.maybe_install_ua_tools' % MPATH, mock.MagicMock())
-    @mock.patch('%s.configure_ua' % MPATH)
-    def test_handle_prefers_new_style_config(
-            self, m_configure_ua):
+    @mock.patch("%s.maybe_install_ua_tools" % MPATH, mock.MagicMock())
+    @mock.patch("%s.configure_ua" % MPATH)
+    def test_handle_prefers_new_style_config(self, m_configure_ua):
         """ubuntu_advantage should be preferred over ubuntu-advantage"""
         cfg = {
-            'ubuntu-advantage': {'token': 'nope', 'enable': ['wrong']},
-            'ubuntu_advantage': {'token': 'token', 'enable': ['esm']},
+            "ubuntu-advantage": {"token": "nope", "enable": ["wrong"]},
+            "ubuntu_advantage": {"token": "token", "enable": ["esm"]},
         }
-        handle('nomatter', cfg=cfg, cloud=None, log=self.logger, args=None)
+        handle("nomatter", cfg=cfg, cloud=None, log=self.logger, args=None)
         self.assertEqual(
             'WARNING: Deprecated configuration key "ubuntu-advantage"'
             ' provided. Expected underscore delimited "ubuntu_advantage";'
-            ' will attempt to continue.',
-            self.logs.getvalue().splitlines()[0])
-        m_configure_ua.assert_called_once_with(
-            token='token', enable=['esm'])
+            " will attempt to continue.",
+            self.logs.getvalue().splitlines()[0],
+        )
+        m_configure_ua.assert_called_once_with(token="token", enable=["esm"])
 
 
 class TestMaybeInstallUATools(CiTestCase):
@@ -285,42 +324,46 @@ class TestMaybeInstallUATools(CiTestCase):
         super(TestMaybeInstallUATools, self).setUp()
         self.tmp = self.tmp_dir()
 
-    @mock.patch('%s.subp.which' % MPATH)
+    @mock.patch("%s.subp.which" % MPATH)
     def test_maybe_install_ua_tools_noop_when_ua_tools_present(self, m_which):
         """Do nothing if ubuntu-advantage-tools already exists."""
-        m_which.return_value = '/usr/bin/ua'  # already installed
+        m_which.return_value = "/usr/bin/ua"  # already installed
         distro = mock.MagicMock()
         distro.update_package_sources.side_effect = RuntimeError(
-            'Some apt error')
+            "Some apt error"
+        )
         maybe_install_ua_tools(cloud=FakeCloud(distro))  # No RuntimeError
 
-    @mock.patch('%s.subp.which' % MPATH)
+    @mock.patch("%s.subp.which" % MPATH)
     def test_maybe_install_ua_tools_raises_update_errors(self, m_which):
         """maybe_install_ua_tools logs and raises apt update errors."""
         m_which.return_value = None
         distro = mock.MagicMock()
         distro.update_package_sources.side_effect = RuntimeError(
-            'Some apt error')
+            "Some apt error"
+        )
         with self.assertRaises(RuntimeError) as context_manager:
             maybe_install_ua_tools(cloud=FakeCloud(distro))
-        self.assertEqual('Some apt error', str(context_manager.exception))
-        self.assertIn('Package update failed\nTraceback', self.logs.getvalue())
+        self.assertEqual("Some apt error", str(context_manager.exception))
+        self.assertIn("Package update failed\nTraceback", self.logs.getvalue())
 
-    @mock.patch('%s.subp.which' % MPATH)
+    @mock.patch("%s.subp.which" % MPATH)
     def test_maybe_install_ua_raises_install_errors(self, m_which):
         """maybe_install_ua_tools logs and raises package install errors."""
         m_which.return_value = None
         distro = mock.MagicMock()
         distro.update_package_sources.return_value = None
         distro.install_packages.side_effect = RuntimeError(
-            'Some install error')
+            "Some install error"
+        )
         with self.assertRaises(RuntimeError) as context_manager:
             maybe_install_ua_tools(cloud=FakeCloud(distro))
-        self.assertEqual('Some install error', str(context_manager.exception))
+        self.assertEqual("Some install error", str(context_manager.exception))
         self.assertIn(
-            'Failed to install ubuntu-advantage-tools\n', self.logs.getvalue())
+            "Failed to install ubuntu-advantage-tools\n", self.logs.getvalue()
+        )
 
-    @mock.patch('%s.subp.which' % MPATH)
+    @mock.patch("%s.subp.which" % MPATH)
     def test_maybe_install_ua_tools_happy_path(self, m_which):
         """maybe_install_ua_tools installs ubuntu-advantage-tools."""
         m_which.return_value = None
@@ -328,6 +371,8 @@ class TestMaybeInstallUATools(CiTestCase):
         maybe_install_ua_tools(cloud=FakeCloud(distro))
         distro.update_package_sources.assert_called_once_with()
         distro.install_packages.assert_called_once_with(
-            ['ubuntu-advantage-tools'])
+            ["ubuntu-advantage-tools"]
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_ubuntu_drivers.py b/tests/unittests/config/test_cc_ubuntu_drivers.py
index d341fbfd..4987492d 100644
--- a/tests/unittests/config/test_cc_ubuntu_drivers.py
+++ b/tests/unittests/config/test_cc_ubuntu_drivers.py
@@ -3,17 +3,20 @@
 import copy
 import os
 
-from tests.unittests.helpers import CiTestCase, skipUnlessJsonSchema, mock
-from cloudinit.config.schema import (
-    SchemaValidationError, validate_cloudconfig_schema)
 from cloudinit.config import cc_ubuntu_drivers as drivers
+from cloudinit.config.schema import (
+    SchemaValidationError,
+    validate_cloudconfig_schema,
+)
 from cloudinit.subp import ProcessExecutionError
+from tests.unittests.helpers import CiTestCase, mock, skipUnlessJsonSchema
 
 MPATH = "cloudinit.config.cc_ubuntu_drivers."
 M_TMP_PATH = MPATH + "temp_utils.mkdtemp"
 OLD_UBUNTU_DRIVERS_ERROR_STDERR = (
     "ubuntu-drivers: error: argument <command>: invalid choice: 'install' "
-    "(choose from 'list', 'autoinstall', 'devices', 'debug')\n")
+    "(choose from 'list', 'autoinstall', 'devices', 'debug')\n"
+)
 
 
 # The tests in this module call helper methods which are decorated with
@@ -23,8 +26,8 @@ OLD_UBUNTU_DRIVERS_ERROR_STDERR = (
 # disable it for the entire module:
 #  pylint: disable=no-value-for-parameter
 
-class AnyTempScriptAndDebconfFile(object):
 
+class AnyTempScriptAndDebconfFile(object):
     def __init__(self, tmp_dir, debconf_file):
         self.tmp_dir = tmp_dir
         self.debconf_file = debconf_file
@@ -33,60 +36,68 @@ class AnyTempScriptAndDebconfFile(object):
         if not len(cmd) == 2:
             return False
         script, debconf_file = cmd
-        if bool(script.startswith(self.tmp_dir) and script.endswith('.sh')):
+        if bool(script.startswith(self.tmp_dir) and script.endswith(".sh")):
             return debconf_file == self.debconf_file
         return False
 
 
 class TestUbuntuDrivers(CiTestCase):
-    cfg_accepted = {'drivers': {'nvidia': {'license-accepted': True}}}
-    install_gpgpu = ['ubuntu-drivers', 'install', '--gpgpu', 'nvidia']
+    cfg_accepted = {"drivers": {"nvidia": {"license-accepted": True}}}
+    install_gpgpu = ["ubuntu-drivers", "install", "--gpgpu", "nvidia"]
 
     with_logs = True
 
     @skipUnlessJsonSchema()
     def test_schema_requires_boolean_for_license_accepted(self):
         with self.assertRaisesRegex(
-                SchemaValidationError, ".*license-accepted.*TRUE.*boolean"):
+            SchemaValidationError, ".*license-accepted.*TRUE.*boolean"
+        ):
             validate_cloudconfig_schema(
-                {'drivers': {'nvidia': {'license-accepted': "TRUE"}}},
-                schema=drivers.schema, strict=True)
+                {"drivers": {"nvidia": {"license-accepted": "TRUE"}}},
+                schema=drivers.schema,
+                strict=True,
+            )
 
     @mock.patch(M_TMP_PATH)
-    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
+    @mock.patch(MPATH + "subp.subp", return_value=("", ""))
     @mock.patch(MPATH + "subp.which", return_value=False)
-    def _assert_happy_path_taken(
-            self, config, m_which, m_subp, m_tmp):
+    def _assert_happy_path_taken(self, config, m_which, m_subp, m_tmp):
         """Positive path test through handle. Package should be installed."""
         tdir = self.tmp_dir()
-        debconf_file = os.path.join(tdir, 'nvidia.template')
+        debconf_file = os.path.join(tdir, "nvidia.template")
         m_tmp.return_value = tdir
         myCloud = mock.MagicMock()
-        drivers.handle('ubuntu_drivers', config, myCloud, None, None)
-        self.assertEqual([mock.call(['ubuntu-drivers-common'])],
-                         myCloud.distro.install_packages.call_args_list)
+        drivers.handle("ubuntu_drivers", config, myCloud, None, None)
+        self.assertEqual(
+            [mock.call(["ubuntu-drivers-common"])],
+            myCloud.distro.install_packages.call_args_list,
+        )
         self.assertEqual(
-            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
-             mock.call(self.install_gpgpu)],
-            m_subp.call_args_list)
+            [
+                mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
+                mock.call(self.install_gpgpu),
+            ],
+            m_subp.call_args_list,
+        )
 
     def test_handle_does_package_install(self):
         self._assert_happy_path_taken(self.cfg_accepted)
 
     def test_trueish_strings_are_considered_approval(self):
-        for true_value in ['yes', 'true', 'on', '1']:
+        for true_value in ["yes", "true", "on", "1"]:
             new_config = copy.deepcopy(self.cfg_accepted)
-            new_config['drivers']['nvidia']['license-accepted'] = true_value
+            new_config["drivers"]["nvidia"]["license-accepted"] = true_value
             self._assert_happy_path_taken(new_config)
 
     @mock.patch(M_TMP_PATH)
     @mock.patch(MPATH + "subp.subp")
     @mock.patch(MPATH + "subp.which", return_value=False)
     def test_handle_raises_error_if_no_drivers_found(
-            self, m_which, m_subp, m_tmp):
+        self, m_which, m_subp, m_tmp
+    ):
         """If ubuntu-drivers doesn't install any drivers, raise an error."""
         tdir = self.tmp_dir()
-        debconf_file = os.path.join(tdir, 'nvidia.template')
+        debconf_file = os.path.join(tdir, "nvidia.template")
         m_tmp.return_value = tdir
         myCloud = mock.MagicMock()
 
@@ -94,84 +105,103 @@ class TestUbuntuDrivers(CiTestCase):
             if cmd[0].startswith(tdir):
                 return
             raise ProcessExecutionError(
-                stdout='No drivers found for installation.\n', exit_code=1)
+                stdout="No drivers found for installation.\n", exit_code=1
+            )
+
         m_subp.side_effect = fake_subp
 
         with self.assertRaises(Exception):
             drivers.handle(
-                'ubuntu_drivers', self.cfg_accepted, myCloud, None, None)
-        self.assertEqual([mock.call(['ubuntu-drivers-common'])],
-                         myCloud.distro.install_packages.call_args_list)
+                "ubuntu_drivers", self.cfg_accepted, myCloud, None, None
+            )
         self.assertEqual(
-            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
-             mock.call(self.install_gpgpu)],
-            m_subp.call_args_list)
-        self.assertIn('ubuntu-drivers found no drivers for installation',
-                      self.logs.getvalue())
-
-    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
+            [mock.call(["ubuntu-drivers-common"])],
+            myCloud.distro.install_packages.call_args_list,
+        )
+        self.assertEqual(
+            [
+                mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
+                mock.call(self.install_gpgpu),
+            ],
+            m_subp.call_args_list,
+        )
+        self.assertIn(
+            "ubuntu-drivers found no drivers for installation",
+            self.logs.getvalue(),
+        )
+
+    @mock.patch(MPATH + "subp.subp", return_value=("", ""))
     @mock.patch(MPATH + "subp.which", return_value=False)
     def _assert_inert_with_config(self, config, m_which, m_subp):
         """Helper to reduce repetition when testing negative cases"""
         myCloud = mock.MagicMock()
-        drivers.handle('ubuntu_drivers', config, myCloud, None, None)
+        drivers.handle("ubuntu_drivers", config, myCloud, None, None)
         self.assertEqual(0, myCloud.distro.install_packages.call_count)
         self.assertEqual(0, m_subp.call_count)
 
     def test_handle_inert_if_license_not_accepted(self):
         """Ensure we don't do anything if the license is rejected."""
         self._assert_inert_with_config(
-            {'drivers': {'nvidia': {'license-accepted': False}}})
+            {"drivers": {"nvidia": {"license-accepted": False}}}
+        )
 
     def test_handle_inert_if_garbage_in_license_field(self):
         """Ensure we don't do anything if unknown text is in license field."""
         self._assert_inert_with_config(
-            {'drivers': {'nvidia': {'license-accepted': 'garbage'}}})
+            {"drivers": {"nvidia": {"license-accepted": "garbage"}}}
+        )
 
     def test_handle_inert_if_no_license_key(self):
         """Ensure we don't do anything if no license key."""
-        self._assert_inert_with_config({'drivers': {'nvidia': {}}})
+        self._assert_inert_with_config({"drivers": {"nvidia": {}}})
 
     def test_handle_inert_if_no_nvidia_key(self):
         """Ensure we don't do anything if other license accepted."""
         self._assert_inert_with_config(
-            {'drivers': {'acme': {'license-accepted': True}}})
+            {"drivers": {"acme": {"license-accepted": True}}}
+        )
 
     def test_handle_inert_if_string_given(self):
         """Ensure we don't do anything if string refusal given."""
-        for false_value in ['no', 'false', 'off', '0']:
+        for false_value in ["no", "false", "off", "0"]:
             self._assert_inert_with_config(
-                {'drivers': {'nvidia': {'license-accepted': false_value}}})
+                {"drivers": {"nvidia": {"license-accepted": false_value}}}
+            )
 
     @mock.patch(MPATH + "install_drivers")
     def test_handle_no_drivers_does_nothing(self, m_install_drivers):
         """If no 'drivers' key in the config, nothing should be done."""
         myCloud = mock.MagicMock()
         myLog = mock.MagicMock()
-        drivers.handle('ubuntu_drivers', {'foo': 'bzr'}, myCloud, myLog, None)
-        self.assertIn('Skipping module named',
-                      myLog.debug.call_args_list[0][0][0])
+        drivers.handle("ubuntu_drivers", {"foo": "bzr"}, myCloud, myLog, None)
+        self.assertIn(
+            "Skipping module named", myLog.debug.call_args_list[0][0][0]
+        )
         self.assertEqual(0, m_install_drivers.call_count)
 
     @mock.patch(M_TMP_PATH)
-    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
+    @mock.patch(MPATH + "subp.subp", return_value=("", ""))
     @mock.patch(MPATH + "subp.which", return_value=True)
     def test_install_drivers_no_install_if_present(
-            self, m_which, m_subp, m_tmp):
+        self, m_which, m_subp, m_tmp
+    ):
         """If 'ubuntu-drivers' is present, no package install should occur."""
         tdir = self.tmp_dir()
-        debconf_file = os.path.join(tdir, 'nvidia.template')
+        debconf_file = os.path.join(tdir, "nvidia.template")
         m_tmp.return_value = tdir
         pkg_install = mock.MagicMock()
-        drivers.install_drivers(self.cfg_accepted['drivers'],
-                                pkg_install_func=pkg_install)
+        drivers.install_drivers(
+            self.cfg_accepted["drivers"], pkg_install_func=pkg_install
+        )
         self.assertEqual(0, pkg_install.call_count)
-        self.assertEqual([mock.call('ubuntu-drivers')],
-                         m_which.call_args_list)
+        self.assertEqual([mock.call("ubuntu-drivers")], m_which.call_args_list)
         self.assertEqual(
-            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
-             mock.call(self.install_gpgpu)],
-            m_subp.call_args_list)
+            [
+                mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
+                mock.call(self.install_gpgpu),
+            ],
+            m_subp.call_args_list,
+        )
 
     def test_install_drivers_rejects_invalid_config(self):
         """install_drivers should raise TypeError if not given a config dict"""
@@ -184,10 +214,11 @@ class TestUbuntuDrivers(CiTestCase):
     @mock.patch(MPATH + "subp.subp")
     @mock.patch(MPATH + "subp.which", return_value=False)
     def test_install_drivers_handles_old_ubuntu_drivers_gracefully(
-            self, m_which, m_subp, m_tmp):
+        self, m_which, m_subp, m_tmp
+    ):
         """Older ubuntu-drivers versions should emit message and raise error"""
         tdir = self.tmp_dir()
-        debconf_file = os.path.join(tdir, 'nvidia.template')
+        debconf_file = os.path.join(tdir, "nvidia.template")
         m_tmp.return_value = tdir
         myCloud = mock.MagicMock()
 
@@ -195,50 +226,68 @@ class TestUbuntuDrivers(CiTestCase):
             if cmd[0].startswith(tdir):
                 return
             raise ProcessExecutionError(
-                stderr=OLD_UBUNTU_DRIVERS_ERROR_STDERR, exit_code=2)
+                stderr=OLD_UBUNTU_DRIVERS_ERROR_STDERR, exit_code=2
+            )
+
         m_subp.side_effect = fake_subp
 
         with self.assertRaises(Exception):
             drivers.handle(
-                'ubuntu_drivers', self.cfg_accepted, myCloud, None, None)
-        self.assertEqual([mock.call(['ubuntu-drivers-common'])],
-                         myCloud.distro.install_packages.call_args_list)
+                "ubuntu_drivers", self.cfg_accepted, myCloud, None, None
+            )
         self.assertEqual(
-            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
-             mock.call(self.install_gpgpu)],
-            m_subp.call_args_list)
-        self.assertIn('WARNING: the available version of ubuntu-drivers is'
-                      ' too old to perform requested driver installation',
-                      self.logs.getvalue())
+            [mock.call(["ubuntu-drivers-common"])],
+            myCloud.distro.install_packages.call_args_list,
+        )
+        self.assertEqual(
+            [
+                mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
+                mock.call(self.install_gpgpu),
+            ],
+            m_subp.call_args_list,
+        )
+        self.assertIn(
+            "WARNING: the available version of ubuntu-drivers is"
+            " too old to perform requested driver installation",
+            self.logs.getvalue(),
+        )
 
 
 # Sub-class TestUbuntuDrivers to run the same test cases, but with a version
 class TestUbuntuDriversWithVersion(TestUbuntuDrivers):
     cfg_accepted = {
-        'drivers': {'nvidia': {'license-accepted': True, 'version': '123'}}}
-    install_gpgpu = ['ubuntu-drivers', 'install', '--gpgpu', 'nvidia:123']
+        "drivers": {"nvidia": {"license-accepted": True, "version": "123"}}
+    }
+    install_gpgpu = ["ubuntu-drivers", "install", "--gpgpu", "nvidia:123"]
 
     @mock.patch(M_TMP_PATH)
-    @mock.patch(MPATH + "subp.subp", return_value=('', ''))
+    @mock.patch(MPATH + "subp.subp", return_value=("", ""))
     @mock.patch(MPATH + "subp.which", return_value=False)
     def test_version_none_uses_latest(self, m_which, m_subp, m_tmp):
         tdir = self.tmp_dir()
-        debconf_file = os.path.join(tdir, 'nvidia.template')
+        debconf_file = os.path.join(tdir, "nvidia.template")
         m_tmp.return_value = tdir
         myCloud = mock.MagicMock()
         version_none_cfg = {
-            'drivers': {'nvidia': {'license-accepted': True, 'version': None}}}
-        drivers.handle(
-            'ubuntu_drivers', version_none_cfg, myCloud, None, None)
+            "drivers": {"nvidia": {"license-accepted": True, "version": None}}
+        }
+        drivers.handle("ubuntu_drivers", version_none_cfg, myCloud, None, None)
         self.assertEqual(
-            [mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
-             mock.call(['ubuntu-drivers', 'install', '--gpgpu', 'nvidia'])],
-            m_subp.call_args_list)
+            [
+                mock.call(AnyTempScriptAndDebconfFile(tdir, debconf_file)),
+                mock.call(["ubuntu-drivers", "install", "--gpgpu", "nvidia"]),
+            ],
+            m_subp.call_args_list,
+        )
 
     def test_specifying_a_version_doesnt_override_license_acceptance(self):
-        self._assert_inert_with_config({
-            'drivers': {'nvidia': {'license-accepted': False,
-                                   'version': '123'}}
-        })
+        self._assert_inert_with_config(
+            {
+                "drivers": {
+                    "nvidia": {"license-accepted": False, "version": "123"}
+                }
+            }
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_update_etc_hosts.py b/tests/unittests/config/test_cc_update_etc_hosts.py
index 35ad6413..2bbc16f4 100644
--- a/tests/unittests/config/test_cc_update_etc_hosts.py
+++ b/tests/unittests/config/test_cc_update_etc_hosts.py
@@ -1,18 +1,13 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.config import cc_update_etc_hosts
-
-from cloudinit import cloud
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import util
-
-from tests.unittests import helpers as t_help
-
 import logging
 import os
 import shutil
 
+from cloudinit import cloud, distros, helpers, util
+from cloudinit.config import cc_update_etc_hosts
+from tests.unittests import helpers as t_help
+
 LOG = logging.getLogger(__name__)
 
 
@@ -28,46 +23,46 @@ class TestHostsFile(t_help.FilesystemMockingTestCase):
 
     def test_write_etc_hosts_suse_localhost(self):
         cfg = {
-            'manage_etc_hosts': 'localhost',
-            'hostname': 'cloud-init.test.us'
+            "manage_etc_hosts": "localhost",
+            "hostname": "cloud-init.test.us",
         }
-        os.makedirs('%s/etc/' % self.tmp)
-        hosts_content = '192.168.1.1 blah.blah.us blah\n'
-        fout = open('%s/etc/hosts' % self.tmp, 'w')
+        os.makedirs("%s/etc/" % self.tmp)
+        hosts_content = "192.168.1.1 blah.blah.us blah\n"
+        fout = open("%s/etc/hosts" % self.tmp, "w")
         fout.write(hosts_content)
         fout.close()
-        distro = self._fetch_distro('sles')
-        distro.hosts_fn = '%s/etc/hosts' % self.tmp
+        distro = self._fetch_distro("sles")
+        distro.hosts_fn = "%s/etc/hosts" % self.tmp
         paths = helpers.Paths({})
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
-        cc_update_etc_hosts.handle('test', cfg, cc, LOG, [])
-        contents = util.load_file('%s/etc/hosts' % self.tmp)
-        if '127.0.1.1\tcloud-init.test.us\tcloud-init' not in contents:
-            self.assertIsNone('No entry for 127.0.1.1 in etc/hosts')
-        if '192.168.1.1\tblah.blah.us\tblah' not in contents:
-            self.assertIsNone('Default etc/hosts content modified')
+        cc_update_etc_hosts.handle("test", cfg, cc, LOG, [])
+        contents = util.load_file("%s/etc/hosts" % self.tmp)
+        if "127.0.1.1\tcloud-init.test.us\tcloud-init" not in contents:
+            self.assertIsNone("No entry for 127.0.1.1 in etc/hosts")
+        if "192.168.1.1\tblah.blah.us\tblah" not in contents:
+            self.assertIsNone("Default etc/hosts content modified")
 
     @t_help.skipUnlessJinja()
     def test_write_etc_hosts_suse_template(self):
         cfg = {
-            'manage_etc_hosts': 'template',
-            'hostname': 'cloud-init.test.us'
+            "manage_etc_hosts": "template",
+            "hostname": "cloud-init.test.us",
         }
         shutil.copytree(
-            t_help.cloud_init_project_dir('templates'),
-            '%s/etc/cloud/templates' % self.tmp,
+            t_help.cloud_init_project_dir("templates"),
+            "%s/etc/cloud/templates" % self.tmp,
         )
-        distro = self._fetch_distro('sles')
+        distro = self._fetch_distro("sles")
         paths = helpers.Paths({})
-        paths.template_tpl = '%s' % self.tmp + '/etc/cloud/templates/%s.tmpl'
+        paths.template_tpl = "%s" % self.tmp + "/etc/cloud/templates/%s.tmpl"
         ds = None
         cc = cloud.Cloud(ds, paths, {}, distro, None)
         self.patchUtils(self.tmp)
-        cc_update_etc_hosts.handle('test', cfg, cc, LOG, [])
-        contents = util.load_file('%s/etc/hosts' % self.tmp)
-        if '127.0.1.1 cloud-init.test.us cloud-init' not in contents:
-            self.assertIsNone('No entry for 127.0.1.1 in etc/hosts')
-        if '::1 cloud-init.test.us cloud-init' not in contents:
-            self.assertIsNone('No entry for 127.0.0.1 in etc/hosts')
+        cc_update_etc_hosts.handle("test", cfg, cc, LOG, [])
+        contents = util.load_file("%s/etc/hosts" % self.tmp)
+        if "127.0.1.1 cloud-init.test.us cloud-init" not in contents:
+            self.assertIsNone("No entry for 127.0.1.1 in etc/hosts")
+        if "::1 cloud-init.test.us cloud-init" not in contents:
+            self.assertIsNone("No entry for 127.0.0.1 in etc/hosts")
diff --git a/tests/unittests/config/test_cc_users_groups.py b/tests/unittests/config/test_cc_users_groups.py
index 4ef844cb..0bd3c980 100644
--- a/tests/unittests/config/test_cc_users_groups.py
+++ b/tests/unittests/config/test_cc_users_groups.py
@@ -7,8 +7,8 @@ from tests.unittests.helpers import CiTestCase, mock
 MODPATH = "cloudinit.config.cc_users_groups"
 
 
-@mock.patch('cloudinit.distros.ubuntu.Distro.create_group')
-@mock.patch('cloudinit.distros.ubuntu.Distro.create_user')
+@mock.patch("cloudinit.distros.ubuntu.Distro.create_group")
+@mock.patch("cloudinit.distros.ubuntu.Distro.create_user")
 class TestHandleUsersGroups(CiTestCase):
     """Test cc_users_groups handling of config."""
 
@@ -18,58 +18,90 @@ class TestHandleUsersGroups(CiTestCase):
         """Test handle with no config will not create users or groups."""
         cfg = {}  # merged cloud-config
         # System config defines a default user for the distro.
-        sys_cfg = {'default_user': {'name': 'ubuntu', 'lock_passwd': True,
-                                    'groups': ['lxd', 'sudo'],
-                                    'shell': '/bin/bash'}}
+        sys_cfg = {
+            "default_user": {
+                "name": "ubuntu",
+                "lock_passwd": True,
+                "groups": ["lxd", "sudo"],
+                "shell": "/bin/bash",
+            }
+        }
         metadata = {}
         cloud = self.tmp_cloud(
-            distro='ubuntu', sys_cfg=sys_cfg, metadata=metadata)
-        cc_users_groups.handle('modulename', cfg, cloud, None, None)
+            distro="ubuntu", sys_cfg=sys_cfg, metadata=metadata
+        )
+        cc_users_groups.handle("modulename", cfg, cloud, None, None)
         m_user.assert_not_called()
         m_group.assert_not_called()
 
     def test_handle_users_in_cfg_calls_create_users(self, m_user, m_group):
         """When users in config, create users with distro.create_user."""
-        cfg = {'users': ['default', {'name': 'me2'}]}  # merged cloud-config
+        cfg = {"users": ["default", {"name": "me2"}]}  # merged cloud-config
         # System config defines a default user for the distro.
-        sys_cfg = {'default_user': {'name': 'ubuntu', 'lock_passwd': True,
-                                    'groups': ['lxd', 'sudo'],
-                                    'shell': '/bin/bash'}}
+        sys_cfg = {
+            "default_user": {
+                "name": "ubuntu",
+                "lock_passwd": True,
+                "groups": ["lxd", "sudo"],
+                "shell": "/bin/bash",
+            }
+        }
         metadata = {}
         cloud = self.tmp_cloud(
-            distro='ubuntu', sys_cfg=sys_cfg, metadata=metadata)
-        cc_users_groups.handle('modulename', cfg, cloud, None, None)
+            distro="ubuntu", sys_cfg=sys_cfg, metadata=metadata
+        )
+        cc_users_groups.handle("modulename", cfg, cloud, None, None)
         self.assertCountEqual(
             m_user.call_args_list,
-            [mock.call('ubuntu', groups='lxd,sudo', lock_passwd=True,
-                       shell='/bin/bash'),
-             mock.call('me2', default=False)])
+            [
+                mock.call(
+                    "ubuntu",
+                    groups="lxd,sudo",
+                    lock_passwd=True,
+                    shell="/bin/bash",
+                ),
+                mock.call("me2", default=False),
+            ],
+        )
         m_group.assert_not_called()
 
-    @mock.patch('cloudinit.distros.freebsd.Distro.create_group')
-    @mock.patch('cloudinit.distros.freebsd.Distro.create_user')
+    @mock.patch("cloudinit.distros.freebsd.Distro.create_group")
+    @mock.patch("cloudinit.distros.freebsd.Distro.create_user")
     def test_handle_users_in_cfg_calls_create_users_on_bsd(
-            self,
-            m_fbsd_user,
-            m_fbsd_group,
-            m_linux_user,
-            m_linux_group,
+        self,
+        m_fbsd_user,
+        m_fbsd_group,
+        m_linux_user,
+        m_linux_group,
     ):
         """When users in config, create users with freebsd.create_user."""
-        cfg = {'users': ['default', {'name': 'me2'}]}  # merged cloud-config
+        cfg = {"users": ["default", {"name": "me2"}]}  # merged cloud-config
         # System config defines a default user for the distro.
-        sys_cfg = {'default_user': {'name': 'freebsd', 'lock_passwd': True,
-                                    'groups': ['wheel'],
-                                    'shell': '/bin/tcsh'}}
+        sys_cfg = {
+            "default_user": {
+                "name": "freebsd",
+                "lock_passwd": True,
+                "groups": ["wheel"],
+                "shell": "/bin/tcsh",
+            }
+        }
         metadata = {}
         cloud = self.tmp_cloud(
-            distro='freebsd', sys_cfg=sys_cfg, metadata=metadata)
-        cc_users_groups.handle('modulename', cfg, cloud, None, None)
+            distro="freebsd", sys_cfg=sys_cfg, metadata=metadata
+        )
+        cc_users_groups.handle("modulename", cfg, cloud, None, None)
         self.assertCountEqual(
             m_fbsd_user.call_args_list,
-            [mock.call('freebsd', groups='wheel', lock_passwd=True,
-                       shell='/bin/tcsh'),
-             mock.call('me2', default=False)])
+            [
+                mock.call(
+                    "freebsd",
+                    groups="wheel",
+                    lock_passwd=True,
+                    shell="/bin/tcsh",
+                ),
+                mock.call("me2", default=False),
+            ],
+        )
         m_fbsd_group.assert_not_called()
         m_linux_group.assert_not_called()
         m_linux_user.assert_not_called()
@@ -77,96 +109,160 @@ class TestHandleUsersGroups(CiTestCase):
     def test_users_with_ssh_redirect_user_passes_keys(self, m_user, m_group):
         """When ssh_redirect_user is True pass default user and cloud keys."""
         cfg = {
-            'users': ['default', {'name': 'me2', 'ssh_redirect_user': True}]}
+            "users": ["default", {"name": "me2", "ssh_redirect_user": True}]
+        }
         # System config defines a default user for the distro.
-        sys_cfg = {'default_user': {'name': 'ubuntu', 'lock_passwd': True,
-                                    'groups': ['lxd', 'sudo'],
-                                    'shell': '/bin/bash'}}
-        metadata = {'public-keys': ['key1']}
+        sys_cfg = {
+            "default_user": {
+                "name": "ubuntu",
+                "lock_passwd": True,
+                "groups": ["lxd", "sudo"],
+                "shell": "/bin/bash",
+            }
+        }
+        metadata = {"public-keys": ["key1"]}
         cloud = self.tmp_cloud(
-            distro='ubuntu', sys_cfg=sys_cfg, metadata=metadata)
-        cc_users_groups.handle('modulename', cfg, cloud, None, None)
+            distro="ubuntu", sys_cfg=sys_cfg, metadata=metadata
+        )
+        cc_users_groups.handle("modulename", cfg, cloud, None, None)
         self.assertCountEqual(
             m_user.call_args_list,
-            [mock.call('ubuntu', groups='lxd,sudo', lock_passwd=True,
-                       shell='/bin/bash'),
-             mock.call('me2', cloud_public_ssh_keys=['key1'], default=False,
-                       ssh_redirect_user='ubuntu')])
+            [
+                mock.call(
+                    "ubuntu",
+                    groups="lxd,sudo",
+                    lock_passwd=True,
+                    shell="/bin/bash",
+                ),
+                mock.call(
+                    "me2",
+                    cloud_public_ssh_keys=["key1"],
+                    default=False,
+                    ssh_redirect_user="ubuntu",
+                ),
+            ],
+        )
         m_group.assert_not_called()
 
     def test_users_with_ssh_redirect_user_default_str(self, m_user, m_group):
         """When ssh_redirect_user is 'default' pass default username."""
         cfg = {
-            'users': ['default', {'name': 'me2',
-                                  'ssh_redirect_user': 'default'}]}
+            "users": [
+                "default",
+                {"name": "me2", "ssh_redirect_user": "default"},
+            ]
+        }
         # System config defines a default user for the distro.
-        sys_cfg = {'default_user': {'name': 'ubuntu', 'lock_passwd': True,
-                                    'groups': ['lxd', 'sudo'],
-                                    'shell': '/bin/bash'}}
-        metadata = {'public-keys': ['key1']}
+        sys_cfg = {
+            "default_user": {
+                "name": "ubuntu",
+                "lock_passwd": True,
+                "groups": ["lxd", "sudo"],
+                "shell": "/bin/bash",
+            }
+        }
+        metadata = {"public-keys": ["key1"]}
         cloud = self.tmp_cloud(
-            distro='ubuntu', sys_cfg=sys_cfg, metadata=metadata)
-        cc_users_groups.handle('modulename', cfg, cloud, None, None)
+            distro="ubuntu", sys_cfg=sys_cfg, metadata=metadata
+        )
+        cc_users_groups.handle("modulename", cfg, cloud, None, None)
         self.assertCountEqual(
             m_user.call_args_list,
-            [mock.call('ubuntu', groups='lxd,sudo', lock_passwd=True,
-                       shell='/bin/bash'),
-             mock.call('me2', cloud_public_ssh_keys=['key1'], default=False,
-                       ssh_redirect_user='ubuntu')])
+            [
+                mock.call(
+                    "ubuntu",
+                    groups="lxd,sudo",
+                    lock_passwd=True,
+                    shell="/bin/bash",
+                ),
+                mock.call(
+                    "me2",
+                    cloud_public_ssh_keys=["key1"],
+                    default=False,
+                    ssh_redirect_user="ubuntu",
+                ),
+            ],
+        )
         m_group.assert_not_called()
 
     def test_users_with_ssh_redirect_user_non_default(self, m_user, m_group):
         """Warn when ssh_redirect_user is not 'default'."""
         cfg = {
-            'users': ['default', {'name': 'me2',
-                                  'ssh_redirect_user': 'snowflake'}]}
+            "users": [
+                "default",
+                {"name": "me2", "ssh_redirect_user": "snowflake"},
+            ]
+        }
         # System config defines a default user for the distro.
-        sys_cfg = {'default_user': {'name': 'ubuntu', 'lock_passwd': True,
-                                    'groups': ['lxd', 'sudo'],
-                                    'shell': '/bin/bash'}}
-        metadata = {'public-keys': ['key1']}
+        sys_cfg = {
+            "default_user": {
+                "name": "ubuntu",
+                "lock_passwd": True,
+                "groups": ["lxd", "sudo"],
+                "shell": "/bin/bash",
+            }
+        }
+        metadata = {"public-keys": ["key1"]}
         cloud = self.tmp_cloud(
-            distro='ubuntu', sys_cfg=sys_cfg, metadata=metadata)
+            distro="ubuntu", sys_cfg=sys_cfg, metadata=metadata
+        )
         with self.assertRaises(ValueError) as context_manager:
-            cc_users_groups.handle('modulename', cfg, cloud, None, None)
+            cc_users_groups.handle("modulename", cfg, cloud, None, None)
         m_group.assert_not_called()
         self.assertEqual(
-            'Not creating user me2. Invalid value of ssh_redirect_user:'
-            ' snowflake. Expected values: true, default or false.',
-            str(context_manager.exception))
+            "Not creating user me2. Invalid value of ssh_redirect_user:"
+            " snowflake. Expected values: true, default or false.",
+            str(context_manager.exception),
+        )
 
     def test_users_with_ssh_redirect_user_default_false(self, m_user, m_group):
         """When unspecified ssh_redirect_user is false and not set up."""
-        cfg = {'users': ['default', {'name': 'me2'}]}
+        cfg = {"users": ["default", {"name": "me2"}]}
         # System config defines a default user for the distro.
-        sys_cfg = {'default_user': {'name': 'ubuntu', 'lock_passwd': True,
-                                    'groups': ['lxd', 'sudo'],
-                                    'shell': '/bin/bash'}}
-        metadata = {'public-keys': ['key1']}
+        sys_cfg = {
+            "default_user": {
+                "name": "ubuntu",
+                "lock_passwd": True,
+                "groups": ["lxd", "sudo"],
+                "shell": "/bin/bash",
+            }
+        }
+        metadata = {"public-keys": ["key1"]}
         cloud = self.tmp_cloud(
-            distro='ubuntu', sys_cfg=sys_cfg, metadata=metadata)
-        cc_users_groups.handle('modulename', cfg, cloud, None, None)
+            distro="ubuntu", sys_cfg=sys_cfg, metadata=metadata
+        )
+        cc_users_groups.handle("modulename", cfg, cloud, None, None)
         self.assertCountEqual(
             m_user.call_args_list,
-            [mock.call('ubuntu', groups='lxd,sudo', lock_passwd=True,
-                       shell='/bin/bash'),
-             mock.call('me2', default=False)])
+            [
+                mock.call(
+                    "ubuntu",
+                    groups="lxd,sudo",
+                    lock_passwd=True,
+                    shell="/bin/bash",
+                ),
+                mock.call("me2", default=False),
+            ],
+        )
         m_group.assert_not_called()
 
     def test_users_ssh_redirect_user_and_no_default(self, m_user, m_group):
         """Warn when ssh_redirect_user is True and no default user present."""
         cfg = {
-            'users': ['default', {'name': 'me2', 'ssh_redirect_user': True}]}
+            "users": ["default", {"name": "me2", "ssh_redirect_user": True}]
+        }
         # System config defines *no* default user for the distro.
         sys_cfg = {}
         metadata = {}  # no public-keys defined
         cloud = self.tmp_cloud(
-            distro='ubuntu', sys_cfg=sys_cfg, metadata=metadata)
-        cc_users_groups.handle('modulename', cfg, cloud, None, None)
-        m_user.assert_called_once_with('me2', default=False)
+            distro="ubuntu", sys_cfg=sys_cfg, metadata=metadata
+        )
+        cc_users_groups.handle("modulename", cfg, cloud, None, None)
+        m_user.assert_called_once_with("me2", default=False)
         m_group.assert_not_called()
         self.assertEqual(
-            'WARNING: Ignoring ssh_redirect_user: True for me2. No'
-            ' default_user defined. Perhaps missing'
-            ' cloud configuration users:  [default, ..].\n',
-            self.logs.getvalue())
+            "WARNING: Ignoring ssh_redirect_user: True for me2. No"
+            " default_user defined. Perhaps missing"
+            " cloud configuration users:  [default, ..].\n",
+            self.logs.getvalue(),
+        )
diff --git a/tests/unittests/config/test_cc_write_files.py b/tests/unittests/config/test_cc_write_files.py
index 99248f74..7eea99d3 100644
--- a/tests/unittests/config/test_cc_write_files.py
+++ b/tests/unittests/config/test_cc_write_files.py
@@ -7,13 +7,15 @@ import io
 import shutil
 import tempfile
 
-from cloudinit.config.cc_write_files import (
-    handle, decode_perms, write_files)
 from cloudinit import log as logging
 from cloudinit import util
-
+from cloudinit.config.cc_write_files import decode_perms, handle, write_files
 from tests.unittests.helpers import (
-    CiTestCase, FilesystemMockingTestCase, mock, skipUnlessJsonSchema)
+    CiTestCase,
+    FilesystemMockingTestCase,
+    mock,
+    skipUnlessJsonSchema,
+)
 
 LOG = logging.getLogger(__name__)
 
@@ -35,73 +37,89 @@ write_files:
 """
 
 YAML_CONTENT_EXPECTED = {
-    '/usr/bin/hello': "#!/bin/sh\necho hello world\n",
-    '/wark': "foobar\n",
-    '/tmp/message': "hi mom line 1\nhi mom line 2\n",
+    "/usr/bin/hello": "#!/bin/sh\necho hello world\n",
+    "/wark": "foobar\n",
+    "/tmp/message": "hi mom line 1\nhi mom line 2\n",
 }
 
 VALID_SCHEMA = {
-    'write_files': [
-        {'append': False, 'content': 'a', 'encoding': 'gzip', 'owner': 'jeff',
-         'path': '/some', 'permissions': '0777'}
+    "write_files": [
+        {
+            "append": False,
+            "content": "a",
+            "encoding": "gzip",
+            "owner": "jeff",
+            "path": "/some",
+            "permissions": "0777",
+        }
     ]
 }
 
 INVALID_SCHEMA = {  # Dropped required path key
-    'write_files': [
-        {'append': False, 'content': 'a', 'encoding': 'gzip', 'owner': 'jeff',
-         'permissions': '0777'}
+    "write_files": [
+        {
+            "append": False,
+            "content": "a",
+            "encoding": "gzip",
+            "owner": "jeff",
+            "permissions": "0777",
+        }
     ]
 }
 
 
 @skipUnlessJsonSchema()
-@mock.patch('cloudinit.config.cc_write_files.write_files')
+@mock.patch("cloudinit.config.cc_write_files.write_files")
 class TestWriteFilesSchema(CiTestCase):
 
     with_logs = True
 
     def test_schema_validation_warns_missing_path(self, m_write_files):
         """The only required file item property is 'path'."""
-        cc = self.tmp_cloud('ubuntu')
-        valid_config = {'write_files': [{'path': '/some/path'}]}
-        handle('cc_write_file', valid_config, cc, LOG, [])
-        self.assertNotIn('Invalid config:', self.logs.getvalue())
-        handle('cc_write_file', INVALID_SCHEMA, cc, LOG, [])
-        self.assertIn('Invalid config:', self.logs.getvalue())
+        cc = self.tmp_cloud("ubuntu")
+        valid_config = {"write_files": [{"path": "/some/path"}]}
+        handle("cc_write_file", valid_config, cc, LOG, [])
+        self.assertNotIn("Invalid config:", self.logs.getvalue())
+        handle("cc_write_file", INVALID_SCHEMA, cc, LOG, [])
+        self.assertIn("Invalid config:", self.logs.getvalue())
         self.assertIn("'path' is a required property", self.logs.getvalue())
 
     def test_schema_validation_warns_non_string_type_for_files(
-            self, m_write_files):
+        self, m_write_files
+    ):
         """Schema validation warns of non-string values for each file item."""
-        cc = self.tmp_cloud('ubuntu')
-        for key in VALID_SCHEMA['write_files'][0].keys():
-            if key == 'append':
-                key_type = 'boolean'
+        cc = self.tmp_cloud("ubuntu")
+        for key in VALID_SCHEMA["write_files"][0].keys():
+            if key == "append":
+                key_type = "boolean"
             else:
-                key_type = 'string'
+                key_type = "string"
             invalid_config = copy.deepcopy(VALID_SCHEMA)
-            invalid_config['write_files'][0][key] = 1
-            handle('cc_write_file', invalid_config, cc, LOG, [])
+            invalid_config["write_files"][0][key] = 1
+            handle("cc_write_file", invalid_config, cc, LOG, [])
             self.assertIn(
-                mock.call('cc_write_file', invalid_config['write_files']),
-                m_write_files.call_args_list)
+                mock.call("cc_write_file", invalid_config["write_files"]),
+                m_write_files.call_args_list,
+            )
             self.assertIn(
-                'write_files.0.%s: 1 is not of type \'%s\'' % (key, key_type),
-                self.logs.getvalue())
-        self.assertIn('Invalid config:', self.logs.getvalue())
+                "write_files.0.%s: 1 is not of type '%s'" % (key, key_type),
+                self.logs.getvalue(),
+            )
+        self.assertIn("Invalid config:", self.logs.getvalue())
 
     def test_schema_validation_warns_on_additional_undefined_propertes(
-            self, m_write_files):
+        self, m_write_files
+    ):
         """Schema validation warns on additional undefined file properties."""
-        cc = self.tmp_cloud('ubuntu')
+        cc = self.tmp_cloud("ubuntu")
         invalid_config = copy.deepcopy(VALID_SCHEMA)
-        invalid_config['write_files'][0]['bogus'] = 'value'
-        handle('cc_write_file', invalid_config, cc, LOG, [])
+        invalid_config["write_files"][0]["bogus"] = "value"
+        handle("cc_write_file", invalid_config, cc, LOG, [])
         self.assertIn(
             "Invalid config:\nwrite_files.0: Additional properties"
             " are not allowed ('bogus' was unexpected)",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
 
 class TestWriteFiles(FilesystemMockingTestCase):
@@ -116,20 +134,20 @@ class TestWriteFiles(FilesystemMockingTestCase):
     @skipUnlessJsonSchema()
     def test_handler_schema_validation_warns_non_array_type(self):
         """Schema validation warns of non-array value."""
-        invalid_config = {'write_files': 1}
-        cc = self.tmp_cloud('ubuntu')
+        invalid_config = {"write_files": 1}
+        cc = self.tmp_cloud("ubuntu")
         with self.assertRaises(TypeError):
-            handle('cc_write_file', invalid_config, cc, LOG, [])
+            handle("cc_write_file", invalid_config, cc, LOG, [])
         self.assertIn(
-            'Invalid config:\nwrite_files: 1 is not of type \'array\'',
-            self.logs.getvalue())
+            "Invalid config:\nwrite_files: 1 is not of type 'array'",
+            self.logs.getvalue(),
+        )
 
     def test_simple(self):
         self.patchUtils(self.tmp)
         expected = "hello world\n"
         filename = "/tmp/my.file"
-        write_files(
-            "test_simple", [{"content": expected, "path": filename}])
+        write_files("test_simple", [{"content": expected, "path": filename}])
         self.assertEqual(util.load_file(filename), expected)
 
     def test_append(self):
@@ -141,13 +159,14 @@ class TestWriteFiles(FilesystemMockingTestCase):
         util.write_file(filename, existing)
         write_files(
             "test_append",
-            [{"content": added, "path": filename, "append": "true"}])
+            [{"content": added, "path": filename, "append": "true"}],
+        )
         self.assertEqual(util.load_file(filename), expected)
 
     def test_yaml_binary(self):
         self.patchUtils(self.tmp)
         data = util.load_yaml(YAML_TEXT)
-        write_files("testname", data['write_files'])
+        write_files("testname", data["write_files"])
         for path, content in YAML_CONTENT_EXPECTED.items():
             self.assertEqual(util.load_file(path), content)
 
@@ -158,13 +177,13 @@ class TestWriteFiles(FilesystemMockingTestCase):
         # for 'gz', 'gzip', 'gz+base64' ...
         data = b"foobzr"
         utf8_valid = b"foobzr"
-        utf8_invalid = b'ab\xaadef'
+        utf8_invalid = b"ab\xaadef"
         files = []
         expected = []
 
-        gz_aliases = ('gz', 'gzip')
-        gz_b64_aliases = ('gz+base64', 'gzip+base64', 'gz+b64', 'gzip+b64')
-        b64_aliases = ('base64', 'b64')
+        gz_aliases = ("gz", "gzip")
+        gz_b64_aliases = ("gz+base64", "gzip+base64", "gz+b64", "gzip+b64")
+        b64_aliases = ("base64", "b64")
 
         datum = (("utf8", utf8_valid), ("no-utf8", utf8_invalid))
         for name, data in datum:
@@ -173,11 +192,13 @@ class TestWriteFiles(FilesystemMockingTestCase):
             b64 = (base64.b64encode(data), b64_aliases)
             for content, aliases in (gz, gz_b64, b64):
                 for enc in aliases:
-                    cur = {'content': content,
-                           'path': '/tmp/file-%s-%s' % (name, enc),
-                           'encoding': enc}
+                    cur = {
+                        "content": content,
+                        "path": "/tmp/file-%s-%s" % (name, enc),
+                        "encoding": enc,
+                    }
                     files.append(cur)
-                    expected.append((cur['path'], data))
+                    expected.append((cur["path"], data))
 
         write_files("test_decoding", files)
 
@@ -185,20 +206,17 @@ class TestWriteFiles(FilesystemMockingTestCase):
             self.assertEqual(util.load_file(path, decode=False), content)
 
         # make sure we actually wrote *some* files.
-        flen_expected = (
-            len(gz_aliases + gz_b64_aliases + b64_aliases) * len(datum))
+        flen_expected = len(gz_aliases + gz_b64_aliases + b64_aliases) * len(
+            datum
+        )
         self.assertEqual(len(expected), flen_expected)
 
     def test_deferred(self):
         self.patchUtils(self.tmp)
-        file_path = '/tmp/deferred.file'
-        config = {
-            'write_files': [
-                {'path': file_path, 'defer': True}
-            ]
-        }
-        cc = self.tmp_cloud('ubuntu')
-        handle('cc_write_file', config, cc, LOG, [])
+        file_path = "/tmp/deferred.file"
+        config = {"write_files": [{"path": file_path, "defer": True}]}
+        cc = self.tmp_cloud("ubuntu")
+        handle("cc_write_file", config, cc, LOG, [])
         with self.assertRaises(FileNotFoundError):
             util.load_file(file_path)
 
diff --git a/tests/unittests/config/test_cc_write_files_deferred.py b/tests/unittests/config/test_cc_write_files_deferred.py
index d33d250a..3faac1bf 100644
--- a/tests/unittests/config/test_cc_write_files_deferred.py
+++ b/tests/unittests/config/test_cc_write_files_deferred.py
@@ -1,48 +1,54 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-import tempfile
 import shutil
+import tempfile
 
-from cloudinit.config.cc_write_files_deferred import (handle)
-from .test_cc_write_files import (VALID_SCHEMA)
 from cloudinit import log as logging
 from cloudinit import util
-
+from cloudinit.config.cc_write_files_deferred import handle
 from tests.unittests.helpers import (
-    CiTestCase, FilesystemMockingTestCase, mock, skipUnlessJsonSchema)
+    CiTestCase,
+    FilesystemMockingTestCase,
+    mock,
+    skipUnlessJsonSchema,
+)
+
+from .test_cc_write_files import VALID_SCHEMA
 
 LOG = logging.getLogger(__name__)
 
 
 @skipUnlessJsonSchema()
-@mock.patch('cloudinit.config.cc_write_files_deferred.write_files')
+@mock.patch("cloudinit.config.cc_write_files_deferred.write_files")
 class TestWriteFilesDeferredSchema(CiTestCase):
 
     with_logs = True
 
-    def test_schema_validation_warns_invalid_value(self,
-                                                   m_write_files_deferred):
+    def test_schema_validation_warns_invalid_value(
+        self, m_write_files_deferred
+    ):
         """If 'defer' is defined, it must be of type 'bool'."""
 
         valid_config = {
-            'write_files': [
-                {**VALID_SCHEMA.get('write_files')[0], 'defer': True}
+            "write_files": [
+                {**VALID_SCHEMA.get("write_files")[0], "defer": True}
             ]
         }
 
         invalid_config = {
-            'write_files': [
-                {**VALID_SCHEMA.get('write_files')[0], 'defer': str('no')}
+            "write_files": [
+                {**VALID_SCHEMA.get("write_files")[0], "defer": str("no")}
             ]
         }
 
-        cc = self.tmp_cloud('ubuntu')
-        handle('cc_write_files_deferred', valid_config, cc, LOG, [])
-        self.assertNotIn('Invalid config:', self.logs.getvalue())
-        handle('cc_write_files_deferred', invalid_config, cc, LOG, [])
-        self.assertIn('Invalid config:', self.logs.getvalue())
-        self.assertIn("defer: 'no' is not of type 'boolean'",
-                      self.logs.getvalue())
+        cc = self.tmp_cloud("ubuntu")
+        handle("cc_write_files_deferred", valid_config, cc, LOG, [])
+        self.assertNotIn("Invalid config:", self.logs.getvalue())
+        handle("cc_write_files_deferred", invalid_config, cc, LOG, [])
+        self.assertIn("Invalid config:", self.logs.getvalue())
+        self.assertIn(
+            "defer: 'no' is not of type 'boolean'", self.logs.getvalue()
+        )
 
 
 class TestWriteFilesDeferred(FilesystemMockingTestCase):
@@ -58,20 +64,20 @@ class TestWriteFilesDeferred(FilesystemMockingTestCase):
         self.patchUtils(self.tmp)
         expected = "hello world\n"
         config = {
-            'write_files': [
+            "write_files": [
                 {
-                    'path': '/tmp/deferred.file',
-                    'defer': True,
-                    'content': expected
+                    "path": "/tmp/deferred.file",
+                    "defer": True,
+                    "content": expected,
                 },
-                {'path': '/tmp/not_deferred.file'}
+                {"path": "/tmp/not_deferred.file"},
             ]
         }
-        cc = self.tmp_cloud('ubuntu')
-        handle('cc_write_files_deferred', config, cc, LOG, [])
-        self.assertEqual(util.load_file('/tmp/deferred.file'), expected)
+        cc = self.tmp_cloud("ubuntu")
+        handle("cc_write_files_deferred", config, cc, LOG, [])
+        self.assertEqual(util.load_file("/tmp/deferred.file"), expected)
         with self.assertRaises(FileNotFoundError):
-            util.load_file('/tmp/not_deferred.file')
+            util.load_file("/tmp/not_deferred.file")
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_yum_add_repo.py b/tests/unittests/config/test_cc_yum_add_repo.py
index 2f11b96a..550b0af2 100644
--- a/tests/unittests/config/test_cc_yum_add_repo.py
+++ b/tests/unittests/config/test_cc_yum_add_repo.py
@@ -20,92 +20,101 @@ class TestConfig(helpers.FilesystemMockingTestCase):
 
     def test_bad_config(self):
         cfg = {
-            'yum_repos': {
-                'epel-testing': {
-                    'name': 'Extra Packages for Enterprise Linux 5 - Testing',
+            "yum_repos": {
+                "epel-testing": {
+                    "name": "Extra Packages for Enterprise Linux 5 - Testing",
                     # Missing this should cause the repo not to be written
                     # 'baseurl': 'http://blah.org/pub/epel/testing/5/$barch',
-                    'enabled': False,
-                    'gpgcheck': True,
-                    'gpgkey': 'file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL',
-                    'failovermethod': 'priority',
+                    "enabled": False,
+                    "gpgcheck": True,
+                    "gpgkey": "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL",
+                    "failovermethod": "priority",
                 },
             },
         }
         self.patchUtils(self.tmp)
-        cc_yum_add_repo.handle('yum_add_repo', cfg, None, LOG, [])
-        self.assertRaises(IOError, util.load_file,
-                          "/etc/yum.repos.d/epel_testing.repo")
+        cc_yum_add_repo.handle("yum_add_repo", cfg, None, LOG, [])
+        self.assertRaises(
+            IOError, util.load_file, "/etc/yum.repos.d/epel_testing.repo"
+        )
 
     def test_write_config(self):
         cfg = {
-            'yum_repos': {
-                'epel-testing': {
-                    'name': 'Extra Packages for Enterprise Linux 5 - Testing',
-                    'baseurl': 'http://blah.org/pub/epel/testing/5/$basearch',
-                    'enabled': False,
-                    'gpgcheck': True,
-                    'gpgkey': 'file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL',
-                    'failovermethod': 'priority',
+            "yum_repos": {
+                "epel-testing": {
+                    "name": "Extra Packages for Enterprise Linux 5 - Testing",
+                    "baseurl": "http://blah.org/pub/epel/testing/5/$basearch",
+                    "enabled": False,
+                    "gpgcheck": True,
+                    "gpgkey": "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL",
+                    "failovermethod": "priority",
                 },
             },
         }
         self.patchUtils(self.tmp)
-        cc_yum_add_repo.handle('yum_add_repo', cfg, None, LOG, [])
+        cc_yum_add_repo.handle("yum_add_repo", cfg, None, LOG, [])
         contents = util.load_file("/etc/yum.repos.d/epel_testing.repo")
         parser = configparser.ConfigParser()
         parser.read_string(contents)
         expected = {
-            'epel_testing': {
-                'name': 'Extra Packages for Enterprise Linux 5 - Testing',
-                'failovermethod': 'priority',
-                'gpgkey': 'file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL',
-                'enabled': '0',
-                'baseurl': 'http://blah.org/pub/epel/testing/5/$basearch',
-                'gpgcheck': '1',
+            "epel_testing": {
+                "name": "Extra Packages for Enterprise Linux 5 - Testing",
+                "failovermethod": "priority",
+                "gpgkey": "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL",
+                "enabled": "0",
+                "baseurl": "http://blah.org/pub/epel/testing/5/$basearch",
+                "gpgcheck": "1",
             }
         }
         for section in expected:
-            self.assertTrue(parser.has_section(section),
-                            "Contains section {0}".format(section))
+            self.assertTrue(
+                parser.has_section(section),
+                "Contains section {0}".format(section),
+            )
             for k, v in expected[section].items():
                 self.assertEqual(parser.get(section, k), v)
 
     def test_write_config_array(self):
         cfg = {
-            'yum_repos': {
-                'puppetlabs-products': {
-                    'name': 'Puppet Labs Products El 6 - $basearch',
-                    'baseurl':
-                        'http://yum.puppetlabs.com/el/6/products/$basearch',
-                    'gpgkey': [
-                        'file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppetlabs',
-                        'file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppet',
+            "yum_repos": {
+                "puppetlabs-products": {
+                    "name": "Puppet Labs Products El 6 - $basearch",
+                    "baseurl": (
+                        "http://yum.puppetlabs.com/el/6/products/$basearch"
+                    ),
+                    "gpgkey": [
+                        "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppetlabs",
+                        "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppet",
                     ],
-                    'enabled': True,
-                    'gpgcheck': True,
+                    "enabled": True,
+                    "gpgcheck": True,
                 }
             }
         }
         self.patchUtils(self.tmp)
-        cc_yum_add_repo.handle('yum_add_repo', cfg, None, LOG, [])
+        cc_yum_add_repo.handle("yum_add_repo", cfg, None, LOG, [])
         contents = util.load_file("/etc/yum.repos.d/puppetlabs_products.repo")
         parser = configparser.ConfigParser()
         parser.read_string(contents)
         expected = {
-            'puppetlabs_products': {
-                'name': 'Puppet Labs Products El 6 - $basearch',
-                'baseurl': 'http://yum.puppetlabs.com/el/6/products/$basearch',
-                'gpgkey': 'file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppetlabs\n'
-                          'file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppet',
-                'enabled': '1',
-                'gpgcheck': '1',
+            "puppetlabs_products": {
+                "name": "Puppet Labs Products El 6 - $basearch",
+                "baseurl": "http://yum.puppetlabs.com/el/6/products/$basearch",
+                "gpgkey": (
+                    "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppetlabs\n"
+                    "file:///etc/pki/rpm-gpg/RPM-GPG-KEY-puppet"
+                ),
+                "enabled": "1",
+                "gpgcheck": "1",
             }
         }
         for section in expected:
-            self.assertTrue(parser.has_section(section),
-                            "Contains section {0}".format(section))
+            self.assertTrue(
+                parser.has_section(section),
+                "Contains section {0}".format(section),
+            )
             for k, v in expected[section].items():
                 self.assertEqual(parser.get(section, k), v)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/config/test_cc_zypper_add_repo.py b/tests/unittests/config/test_cc_zypper_add_repo.py
index 4af04bee..4304fee1 100644
--- a/tests/unittests/config/test_cc_zypper_add_repo.py
+++ b/tests/unittests/config/test_cc_zypper_add_repo.py
@@ -17,31 +17,28 @@ class TestConfig(helpers.FilesystemMockingTestCase):
     def setUp(self):
         super(TestConfig, self).setUp()
         self.tmp = self.tmp_dir()
-        self.zypp_conf = 'etc/zypp/zypp.conf'
+        self.zypp_conf = "etc/zypp/zypp.conf"
 
     def test_bad_repo_config(self):
         """Config has no baseurl, no file should be written"""
         cfg = {
-            'repos': [
-                {
-                    'id': 'foo',
-                    'name': 'suse-test',
-                    'enabled': '1'
-                },
+            "repos": [
+                {"id": "foo", "name": "suse-test", "enabled": "1"},
             ]
         }
         self.patchUtils(self.tmp)
-        cc_zypper_add_repo._write_repos(cfg['repos'], '/etc/zypp/repos.d')
-        self.assertRaises(IOError, util.load_file,
-                          "/etc/zypp/repos.d/foo.repo")
+        cc_zypper_add_repo._write_repos(cfg["repos"], "/etc/zypp/repos.d")
+        self.assertRaises(
+            IOError, util.load_file, "/etc/zypp/repos.d/foo.repo"
+        )
 
     def test_write_repos(self):
         """Verify valid repos get written"""
         cfg = self._get_base_config_repos()
         root_d = self.tmp_dir()
-        cc_zypper_add_repo._write_repos(cfg['zypper']['repos'], root_d)
-        repos = glob.glob('%s/*.repo' % root_d)
-        expected_repos = ['testing-foo.repo', 'testing-bar.repo']
+        cc_zypper_add_repo._write_repos(cfg["zypper"]["repos"], root_d)
+        repos = glob.glob("%s/*.repo" % root_d)
+        expected_repos = ["testing-foo.repo", "testing-bar.repo"]
         if len(repos) != 2:
             assert 'Number of repos written is "%d" expected 2' % len(repos)
         for repo in repos:
@@ -53,80 +50,77 @@ class TestConfig(helpers.FilesystemMockingTestCase):
     def test_write_repo(self):
         """Verify the content of a repo file"""
         cfg = {
-            'repos': [
+            "repos": [
                 {
-                    'baseurl': 'http://foo',
-                    'name': 'test-foo',
-                    'id': 'testing-foo'
+                    "baseurl": "http://foo",
+                    "name": "test-foo",
+                    "id": "testing-foo",
                 },
             ]
         }
         root_d = self.tmp_dir()
-        cc_zypper_add_repo._write_repos(cfg['repos'], root_d)
+        cc_zypper_add_repo._write_repos(cfg["repos"], root_d)
         contents = util.load_file("%s/testing-foo.repo" % root_d)
         parser = configparser.ConfigParser()
         parser.read_string(contents)
         expected = {
-            'testing-foo': {
-                'name': 'test-foo',
-                'baseurl': 'http://foo',
-                'enabled': '1',
-                'autorefresh': '1'
+            "testing-foo": {
+                "name": "test-foo",
+                "baseurl": "http://foo",
+                "enabled": "1",
+                "autorefresh": "1",
             }
         }
         for section in expected:
-            self.assertTrue(parser.has_section(section),
-                            "Contains section {0}".format(section))
+            self.assertTrue(
+                parser.has_section(section),
+                "Contains section {0}".format(section),
+            )
             for k, v in expected[section].items():
                 self.assertEqual(parser.get(section, k), v)
 
     def test_config_write(self):
         """Write valid configuration data"""
-        cfg = {
-            'config': {
-                'download.deltarpm': 'False',
-                'reposdir': 'foo'
-            }
-        }
+        cfg = {"config": {"download.deltarpm": "False", "reposdir": "foo"}}
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {self.zypp_conf: '# Zypp config\n'})
+        helpers.populate_dir(root_d, {self.zypp_conf: "# Zypp config\n"})
         self.reRoot(root_d)
-        cc_zypper_add_repo._write_zypp_config(cfg['config'])
+        cc_zypper_add_repo._write_zypp_config(cfg["config"])
         cfg_out = os.path.join(root_d, self.zypp_conf)
         contents = util.load_file(cfg_out)
         expected = [
-            '# Zypp config',
-            '# Added via cloud.cfg',
-            'download.deltarpm=False',
-            'reposdir=foo'
+            "# Zypp config",
+            "# Added via cloud.cfg",
+            "download.deltarpm=False",
+            "reposdir=foo",
         ]
-        for item in contents.split('\n'):
+        for item in contents.split("\n"):
             if item not in expected:
                 self.assertIsNone(item)
 
-    @mock.patch('cloudinit.log.logging')
+    @mock.patch("cloudinit.log.logging")
     def test_config_write_skip_configdir(self, mock_logging):
         """Write configuration but skip writing 'configdir' setting"""
         cfg = {
-            'config': {
-                'download.deltarpm': 'False',
-                'reposdir': 'foo',
-                'configdir': 'bar'
+            "config": {
+                "download.deltarpm": "False",
+                "reposdir": "foo",
+                "configdir": "bar",
             }
         }
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {self.zypp_conf: '# Zypp config\n'})
+        helpers.populate_dir(root_d, {self.zypp_conf: "# Zypp config\n"})
         self.reRoot(root_d)
-        cc_zypper_add_repo._write_zypp_config(cfg['config'])
+        cc_zypper_add_repo._write_zypp_config(cfg["config"])
         cfg_out = os.path.join(root_d, self.zypp_conf)
         contents = util.load_file(cfg_out)
         expected = [
-            '# Zypp config',
-            '# Added via cloud.cfg',
-            'download.deltarpm=False',
-            'reposdir=foo'
+            "# Zypp config",
+            "# Added via cloud.cfg",
+            "download.deltarpm=False",
+            "reposdir=foo",
         ]
-        for item in contents.split('\n'):
+        for item in contents.split("\n"):
             if item not in expected:
                 self.assertIsNone(item)
         # Not finding teh right path for mocking :(
@@ -134,55 +128,53 @@ class TestConfig(helpers.FilesystemMockingTestCase):
 
     def test_empty_config_section_no_new_data(self):
         """When the config section is empty no new data should be written to
-           zypp.conf"""
+        zypp.conf"""
         cfg = self._get_base_config_repos()
-        cfg['zypper']['config'] = None
+        cfg["zypper"]["config"] = None
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {self.zypp_conf: '# No data'})
+        helpers.populate_dir(root_d, {self.zypp_conf: "# No data"})
         self.reRoot(root_d)
-        cc_zypper_add_repo._write_zypp_config(cfg.get('config', {}))
+        cc_zypper_add_repo._write_zypp_config(cfg.get("config", {}))
         cfg_out = os.path.join(root_d, self.zypp_conf)
         contents = util.load_file(cfg_out)
-        self.assertEqual(contents, '# No data')
+        self.assertEqual(contents, "# No data")
 
     def test_empty_config_value_no_new_data(self):
         """When the config section is not empty but there are no values
-           no new data should be written to zypp.conf"""
+        no new data should be written to zypp.conf"""
         cfg = self._get_base_config_repos()
-        cfg['zypper']['config'] = {
-            'download.deltarpm': None
-        }
+        cfg["zypper"]["config"] = {"download.deltarpm": None}
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {self.zypp_conf: '# No data'})
+        helpers.populate_dir(root_d, {self.zypp_conf: "# No data"})
         self.reRoot(root_d)
-        cc_zypper_add_repo._write_zypp_config(cfg.get('config', {}))
+        cc_zypper_add_repo._write_zypp_config(cfg.get("config", {}))
         cfg_out = os.path.join(root_d, self.zypp_conf)
         contents = util.load_file(cfg_out)
-        self.assertEqual(contents, '# No data')
+        self.assertEqual(contents, "# No data")
 
     def test_handler_full_setup(self):
         """Test that the handler ends up calling the renderers"""
         cfg = self._get_base_config_repos()
-        cfg['zypper']['config'] = {
-            'download.deltarpm': 'False',
+        cfg["zypper"]["config"] = {
+            "download.deltarpm": "False",
         }
         root_d = self.tmp_dir()
-        os.makedirs('%s/etc/zypp/repos.d' % root_d)
-        helpers.populate_dir(root_d, {self.zypp_conf: '# Zypp config\n'})
+        os.makedirs("%s/etc/zypp/repos.d" % root_d)
+        helpers.populate_dir(root_d, {self.zypp_conf: "# Zypp config\n"})
         self.reRoot(root_d)
-        cc_zypper_add_repo.handle('zypper_add_repo', cfg, None, LOG, [])
+        cc_zypper_add_repo.handle("zypper_add_repo", cfg, None, LOG, [])
         cfg_out = os.path.join(root_d, self.zypp_conf)
         contents = util.load_file(cfg_out)
         expected = [
-            '# Zypp config',
-            '# Added via cloud.cfg',
-            'download.deltarpm=False',
+            "# Zypp config",
+            "# Added via cloud.cfg",
+            "download.deltarpm=False",
         ]
-        for item in contents.split('\n'):
+        for item in contents.split("\n"):
             if item not in expected:
                 self.assertIsNone(item)
-        repos = glob.glob('%s/etc/zypp/repos.d/*.repo' % root_d)
-        expected_repos = ['testing-foo.repo', 'testing-bar.repo']
+        repos = glob.glob("%s/etc/zypp/repos.d/*.repo" % root_d)
+        expected_repos = ["testing-foo.repo", "testing-bar.repo"]
         if len(repos) != 2:
             assert 'Number of repos written is "%d" expected 2' % len(repos)
         for repo in repos:
@@ -192,39 +184,39 @@ class TestConfig(helpers.FilesystemMockingTestCase):
 
     def test_no_config_section_no_new_data(self):
         """When there is no config section no new data should be written to
-           zypp.conf"""
+        zypp.conf"""
         cfg = self._get_base_config_repos()
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {self.zypp_conf: '# No data'})
+        helpers.populate_dir(root_d, {self.zypp_conf: "# No data"})
         self.reRoot(root_d)
-        cc_zypper_add_repo._write_zypp_config(cfg.get('config', {}))
+        cc_zypper_add_repo._write_zypp_config(cfg.get("config", {}))
         cfg_out = os.path.join(root_d, self.zypp_conf)
         contents = util.load_file(cfg_out)
-        self.assertEqual(contents, '# No data')
+        self.assertEqual(contents, "# No data")
 
     def test_no_repo_data(self):
         """When there is no repo data nothing should happen"""
         root_d = self.tmp_dir()
         self.reRoot(root_d)
         cc_zypper_add_repo._write_repos(None, root_d)
-        content = glob.glob('%s/*' % root_d)
+        content = glob.glob("%s/*" % root_d)
         self.assertEqual(len(content), 0)
 
     def _get_base_config_repos(self):
         """Basic valid repo configuration"""
         cfg = {
-            'zypper': {
-                'repos': [
+            "zypper": {
+                "repos": [
                     {
-                        'baseurl': 'http://foo',
-                        'name': 'test-foo',
-                        'id': 'testing-foo'
+                        "baseurl": "http://foo",
+                        "name": "test-foo",
+                        "id": "testing-foo",
                     },
                     {
-                        'baseurl': 'http://bar',
-                        'name': 'test-bar',
-                        'id': 'testing-bar'
-                    }
+                        "baseurl": "http://bar",
+                        "name": "test-bar",
+                        "id": "testing-bar",
+                    },
                 ]
             }
         }
diff --git a/tests/unittests/config/test_schema.py b/tests/unittests/config/test_schema.py
index 40803cae..fb5b891d 100644
--- a/tests/unittests/config/test_schema.py
+++ b/tests/unittests/config/test_schema.py
@@ -2,35 +2,36 @@
 
 
 import importlib
-import sys
 import inspect
+import itertools
 import logging
+import sys
 from copy import copy
-import itertools
-import pytest
 from pathlib import Path
 from textwrap import dedent
+
+import pytest
 from yaml import safe_load
 
 from cloudinit.config.schema import (
     CLOUD_CONFIG_HEADER,
+    MetaSchema,
     SchemaValidationError,
     annotated_cloudconfig_file,
+    get_jsonschema_validator,
     get_meta_doc,
     get_schema,
-    get_jsonschema_validator,
+    main,
     validate_cloudconfig_file,
     validate_cloudconfig_metaschema,
     validate_cloudconfig_schema,
-    main,
-    MetaSchema,
 )
 from cloudinit.util import write_file
 from tests.unittests.helpers import (
     CiTestCase,
+    cloud_init_project_dir,
     mock,
     skipUnlessJsonSchema,
-    cloud_init_project_dir,
 )
 
 
@@ -78,26 +79,25 @@ def get_module_variable(var_name) -> dict:
 
 
 class GetSchemaTest(CiTestCase):
-
     def test_get_schema_coalesces_known_schema(self):
         """Every cloudconfig module with schema is listed in allOf keyword."""
         schema = get_schema()
         self.assertCountEqual(
             [
-                'cc_apk_configure',
-                'cc_apt_configure',
-                'cc_bootcmd',
-                'cc_locale',
-                'cc_ntp',
-                'cc_resizefs',
-                'cc_runcmd',
-                'cc_snap',
-                'cc_ubuntu_advantage',
-                'cc_ubuntu_drivers',
-                'cc_write_files',
-                'cc_zypper_add_repo',
-                'cc_chef',
-                'cc_install_hotplug',
+                "cc_apk_configure",
+                "cc_apt_configure",
+                "cc_bootcmd",
+                "cc_locale",
+                "cc_ntp",
+                "cc_resizefs",
+                "cc_runcmd",
+                "cc_snap",
+                "cc_ubuntu_advantage",
+                "cc_ubuntu_drivers",
+                "cc_write_files",
+                "cc_zypper_add_repo",
+                "cc_chef",
+                "cc_install_hotplug",
             ],
             [meta["id"] for meta in get_metas().values() if meta is not None],
         )
@@ -113,15 +113,18 @@ class SchemaValidationErrorTest(CiTestCase):
 
     def test_schema_validation_error_expects_schema_errors(self):
         """SchemaValidationError is initialized from schema_errors."""
-        errors = (('key.path', 'unexpected key "junk"'),
-                  ('key2.path', '"-123" is not a valid "hostname" format'))
+        errors = (
+            ("key.path", 'unexpected key "junk"'),
+            ("key2.path", '"-123" is not a valid "hostname" format'),
+        )
         exception = SchemaValidationError(schema_errors=errors)
         self.assertIsInstance(exception, Exception)
         self.assertEqual(exception.schema_errors, errors)
         self.assertEqual(
             'Cloud config schema errors: key.path: unexpected key "junk", '
             'key2.path: "-123" is not a valid "hostname" format',
-            str(exception))
+            str(exception),
+        )
         self.assertTrue(isinstance(exception, ValueError))
 
 
@@ -133,18 +136,19 @@ class ValidateCloudConfigSchemaTest(CiTestCase):
     @skipUnlessJsonSchema()
     def test_validateconfig_schema_non_strict_emits_warnings(self):
         """When strict is False validate_cloudconfig_schema emits warnings."""
-        schema = {'properties': {'p1': {'type': 'string'}}}
-        validate_cloudconfig_schema({'p1': -1}, schema, strict=False)
+        schema = {"properties": {"p1": {"type": "string"}}}
+        validate_cloudconfig_schema({"p1": -1}, schema, strict=False)
         self.assertIn(
             "Invalid config:\np1: -1 is not of type 'string'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
     @skipUnlessJsonSchema()
     def test_validateconfig_schema_emits_warning_on_missing_jsonschema(self):
         """Warning from validate_cloudconfig_schema when missing jsonschema."""
-        schema = {'properties': {'p1': {'type': 'string'}}}
-        with mock.patch.dict('sys.modules', **{'jsonschema': ImportError()}):
-            validate_cloudconfig_schema({'p1': -1}, schema, strict=True)
+        schema = {"properties": {"p1": {"type": "string"}}}
+        with mock.patch.dict("sys.modules", **{"jsonschema": ImportError()}):
+            validate_cloudconfig_schema({"p1": -1}, schema, strict=True)
         self.assertIn(
             "Ignoring schema validation. jsonschema is not present",
             self.logs.getvalue(),
@@ -153,28 +157,28 @@ class ValidateCloudConfigSchemaTest(CiTestCase):
     @skipUnlessJsonSchema()
     def test_validateconfig_schema_strict_raises_errors(self):
         """When strict is True validate_cloudconfig_schema raises errors."""
-        schema = {'properties': {'p1': {'type': 'string'}}}
+        schema = {"properties": {"p1": {"type": "string"}}}
         with self.assertRaises(SchemaValidationError) as context_mgr:
-            validate_cloudconfig_schema({'p1': -1}, schema, strict=True)
+            validate_cloudconfig_schema({"p1": -1}, schema, strict=True)
         self.assertEqual(
             "Cloud config schema errors: p1: -1 is not of type 'string'",
-            str(context_mgr.exception))
+            str(context_mgr.exception),
+        )
 
     @skipUnlessJsonSchema()
     def test_validateconfig_schema_honors_formats(self):
         """With strict True, validate_cloudconfig_schema errors on format."""
-        schema = {
-            'properties': {'p1': {'type': 'string', 'format': 'email'}}}
+        schema = {"properties": {"p1": {"type": "string", "format": "email"}}}
         with self.assertRaises(SchemaValidationError) as context_mgr:
-            validate_cloudconfig_schema({'p1': '-1'}, schema, strict=True)
+            validate_cloudconfig_schema({"p1": "-1"}, schema, strict=True)
         self.assertEqual(
             "Cloud config schema errors: p1: '-1' is not a 'email'",
-            str(context_mgr.exception))
+            str(context_mgr.exception),
+        )
 
     @skipUnlessJsonSchema()
     def test_validateconfig_schema_honors_formats_strict_metaschema(self):
-        """With strict True and strict_metascheam True, ensure errors on format
-        """
+        """With strict and strict_metaschema True, ensure errors on format"""
         schema = {"properties": {"p1": {"type": "string", "format": "email"}}}
         with self.assertRaises(SchemaValidationError) as context_mgr:
             validate_cloudconfig_schema(
@@ -229,15 +233,15 @@ class ValidateCloudConfigFileTest(CiTestCase):
 
     def setUp(self):
         super(ValidateCloudConfigFileTest, self).setUp()
-        self.config_file = self.tmp_path('cloudcfg.yaml')
+        self.config_file = self.tmp_path("cloudcfg.yaml")
 
     def test_validateconfig_file_error_on_absent_file(self):
         """On absent config_path, validate_cloudconfig_file errors."""
         with self.assertRaises(RuntimeError) as context_mgr:
-            validate_cloudconfig_file('/not/here', {})
+            validate_cloudconfig_file("/not/here", {})
         self.assertEqual(
-            'Configfile /not/here does not exist',
-            str(context_mgr.exception))
+            "Configfile /not/here does not exist", str(context_mgr.exception)
+        )
 
     def test_validateconfig_file_error_on_invalid_header(self):
         """On invalid header, validate_cloudconfig_file errors.
@@ -245,48 +249,54 @@ class ValidateCloudConfigFileTest(CiTestCase):
         A SchemaValidationError is raised when the file doesn't begin with
         CLOUD_CONFIG_HEADER.
         """
-        write_file(self.config_file, '#junk')
+        write_file(self.config_file, "#junk")
         with self.assertRaises(SchemaValidationError) as context_mgr:
             validate_cloudconfig_file(self.config_file, {})
         self.assertEqual(
-            'Cloud config schema errors: format-l1.c1: File {0} needs to begin'
+            "Cloud config schema errors: format-l1.c1: File {0} needs to begin"
             ' with "{1}"'.format(
-                self.config_file, CLOUD_CONFIG_HEADER.decode()),
-            str(context_mgr.exception))
+                self.config_file, CLOUD_CONFIG_HEADER.decode()
+            ),
+            str(context_mgr.exception),
+        )
 
     def test_validateconfig_file_error_on_non_yaml_scanner_error(self):
         """On non-yaml scan issues, validate_cloudconfig_file errors."""
         # Generate a scanner error by providing text on a single line with
         # improper indent.
-        write_file(self.config_file, '#cloud-config\nasdf:\nasdf')
+        write_file(self.config_file, "#cloud-config\nasdf:\nasdf")
         with self.assertRaises(SchemaValidationError) as context_mgr:
             validate_cloudconfig_file(self.config_file, {})
         self.assertIn(
-            'schema errors: format-l3.c1: File {0} is not valid yaml.'.format(
-                self.config_file),
-            str(context_mgr.exception))
+            "schema errors: format-l3.c1: File {0} is not valid yaml.".format(
+                self.config_file
+            ),
+            str(context_mgr.exception),
+        )
 
     def test_validateconfig_file_error_on_non_yaml_parser_error(self):
         """On non-yaml parser issues, validate_cloudconfig_file errors."""
-        write_file(self.config_file, '#cloud-config\n{}}')
+        write_file(self.config_file, "#cloud-config\n{}}")
         with self.assertRaises(SchemaValidationError) as context_mgr:
             validate_cloudconfig_file(self.config_file, {})
         self.assertIn(
-            'schema errors: format-l2.c3: File {0} is not valid yaml.'.format(
-                self.config_file),
-            str(context_mgr.exception))
+            "schema errors: format-l2.c3: File {0} is not valid yaml.".format(
+                self.config_file
+            ),
+            str(context_mgr.exception),
+        )
 
     @skipUnlessJsonSchema()
     def test_validateconfig_file_sctrictly_validates_schema(self):
         """validate_cloudconfig_file raises errors on invalid schema."""
-        schema = {
-            'properties': {'p1': {'type': 'string', 'format': 'string'}}}
-        write_file(self.config_file, '#cloud-config\np1: -1')
+        schema = {"properties": {"p1": {"type": "string", "format": "string"}}}
+        write_file(self.config_file, "#cloud-config\np1: -1")
         with self.assertRaises(SchemaValidationError) as context_mgr:
             validate_cloudconfig_file(self.config_file, schema)
         self.assertEqual(
             "Cloud config schema errors: p1: -1 is not of type 'string'",
-            str(context_mgr.exception))
+            str(context_mgr.exception),
+        )
 
 
 class GetSchemaDocTest(CiTestCase):
@@ -321,13 +331,21 @@ class GetSchemaDocTest(CiTestCase):
         """get_meta_doc returns restructured text for a cloudinit schema."""
         full_schema = copy(self.required_schema)
         full_schema.update(
-            {'properties': {
-                'prop1': {'type': 'array', 'description': 'prop-description',
-                          'items': {'type': 'integer'}}}})
+            {
+                "properties": {
+                    "prop1": {
+                        "type": "array",
+                        "description": "prop-description",
+                        "items": {"type": "integer"},
+                    }
+                }
+            }
+        )
 
         doc = get_meta_doc(self.meta, full_schema)
         self.assertEqual(
-            dedent("""
+            dedent(
+                """
                 name
                 ----
                 **Summary:** title
@@ -349,7 +367,8 @@ class GetSchemaDocTest(CiTestCase):
                         [don't, expand, "this"]
                     # --- Example2 ---
                     ex2: true
-            """),
+            """
+            ),
             doc,
         )
 
@@ -388,12 +407,23 @@ class GetSchemaDocTest(CiTestCase):
         """get_meta_doc properly indented examples as a list of strings."""
         full_schema = copy(self.required_schema)
         full_schema.update(
-            {'examples': ['ex1:\n    [don\'t, expand, "this"]', 'ex2: true'],
-             'properties': {
-                'prop1': {'type': 'array', 'description': 'prop-description',
-                          'items': {'type': 'integer'}}}})
+            {
+                "examples": [
+                    'ex1:\n    [don\'t, expand, "this"]',
+                    "ex2: true",
+                ],
+                "properties": {
+                    "prop1": {
+                        "type": "array",
+                        "description": "prop-description",
+                        "items": {"type": "integer"},
+                    }
+                },
+            }
+        )
         self.assertIn(
-            dedent("""
+            dedent(
+                """
                 **Config schema**:
                     **prop1:** (array of integer) prop-description
 
@@ -403,7 +433,8 @@ class GetSchemaDocTest(CiTestCase):
                         [don't, expand, "this"]
                     # --- Example2 ---
                     ex2: true
-            """),
+            """
+            ),
             get_meta_doc(self.meta, full_schema),
         )
 
@@ -424,13 +455,15 @@ class GetSchemaDocTest(CiTestCase):
                           - option3
 
                         The default value is
-                        option1""")
+                        option1"""
+                    ),
                 }
             }
         }
 
         self.assertIn(
-            dedent("""
+            dedent(
+                """
                 **Config schema**:
                     **p1:** (string) This item has the following options:
 
@@ -440,7 +473,8 @@ class GetSchemaDocTest(CiTestCase):
 
                     The default value is option1
 
-            """),
+            """
+            ),
             get_meta_doc(self.meta, schema),
         )
 
@@ -475,7 +509,7 @@ class GetSchemaDocTest(CiTestCase):
                     "type": "string",
                 },
                 "prop_array": {
-                    "label": 'array_label',
+                    "label": "array_label",
                     "type": "array",
                     "items": {
                         "type": "object",
@@ -490,7 +524,7 @@ class GetSchemaDocTest(CiTestCase):
                     "type": "string",
                     "label": "label2",
                 }
-            }
+            },
         }
         meta_doc = get_meta_doc(self.meta, schema)
         assert "**label1:** (string)" in meta_doc
@@ -507,20 +541,23 @@ class AnnotatedCloudconfigFileTest(CiTestCase):
 
     def test_annotated_cloudconfig_file_no_schema_errors(self):
         """With no schema_errors, print the original content."""
-        content = b'ntp:\n  pools: [ntp1.pools.com]\n'
+        content = b"ntp:\n  pools: [ntp1.pools.com]\n"
         self.assertEqual(
-            content,
-            annotated_cloudconfig_file({}, content, schema_errors=[]))
+            content, annotated_cloudconfig_file({}, content, schema_errors=[])
+        )
 
     def test_annotated_cloudconfig_file_schema_annotates_and_adds_footer(self):
         """With schema_errors, error lines are annotated and a footer added."""
-        content = dedent("""\
+        content = dedent(
+            """\
             #cloud-config
             # comment
             ntp:
               pools: [-99, 75]
-            """).encode()
-        expected = dedent("""\
+            """
+        ).encode()
+        expected = dedent(
+            """\
             #cloud-config
             # comment
             ntp:		# E1
@@ -531,38 +568,48 @@ class AnnotatedCloudconfigFileTest(CiTestCase):
             # E2: -99 is not a string
             # E3: 75 is not a string
 
-            """)
+            """
+        )
         parsed_config = safe_load(content[13:])
         schema_errors = [
-            ('ntp', 'Some type error'), ('ntp.pools.0', '-99 is not a string'),
-            ('ntp.pools.1', '75 is not a string')]
+            ("ntp", "Some type error"),
+            ("ntp.pools.0", "-99 is not a string"),
+            ("ntp.pools.1", "75 is not a string"),
+        ]
         self.assertEqual(
             expected,
-            annotated_cloudconfig_file(parsed_config, content, schema_errors))
+            annotated_cloudconfig_file(parsed_config, content, schema_errors),
+        )
 
     def test_annotated_cloudconfig_file_annotates_separate_line_items(self):
         """Errors are annotated for lists with items on separate lines."""
-        content = dedent("""\
+        content = dedent(
+            """\
             #cloud-config
             # comment
             ntp:
               pools:
                 - -99
                 - 75
-            """).encode()
-        expected = dedent("""\
+            """
+        ).encode()
+        expected = dedent(
+            """\
             ntp:
               pools:
                 - -99		# E1
                 - 75		# E2
-            """)
+            """
+        )
         parsed_config = safe_load(content[13:])
         schema_errors = [
-            ('ntp.pools.0', '-99 is not a string'),
-            ('ntp.pools.1', '75 is not a string')]
+            ("ntp.pools.0", "-99 is not a string"),
+            ("ntp.pools.1", "75 is not a string"),
+        ]
         self.assertIn(
             expected,
-            annotated_cloudconfig_file(parsed_config, content, schema_errors))
+            annotated_cloudconfig_file(parsed_config, content, schema_errors),
+        )
 
 
 class TestMain:
@@ -575,94 +622,94 @@ class TestMain:
     def test_main_exclusive_args(self, params, capsys):
         """Main exits non-zero and error on required exclusive args."""
         params = list(itertools.chain(*[a.split() for a in params]))
-        with mock.patch('sys.argv', ['mycmd'] + params):
+        with mock.patch("sys.argv", ["mycmd"] + params):
             with pytest.raises(SystemExit) as context_manager:
                 main()
         assert 1 == context_manager.value.code
 
         _out, err = capsys.readouterr()
         expected = (
-            'Error:\n'
-            'Expected one of --config-file, --system or --docs arguments\n'
+            "Error:\n"
+            "Expected one of --config-file, --system or --docs arguments\n"
         )
         assert expected == err
 
     def test_main_missing_args(self, capsys):
         """Main exits non-zero and reports an error on missing parameters."""
-        with mock.patch('sys.argv', ['mycmd']):
+        with mock.patch("sys.argv", ["mycmd"]):
             with pytest.raises(SystemExit) as context_manager:
                 main()
         assert 1 == context_manager.value.code
 
         _out, err = capsys.readouterr()
         expected = (
-            'Error:\n'
-            'Expected one of --config-file, --system or --docs arguments\n'
+            "Error:\n"
+            "Expected one of --config-file, --system or --docs arguments\n"
         )
         assert expected == err
 
     def test_main_absent_config_file(self, capsys):
         """Main exits non-zero when config file is absent."""
-        myargs = ['mycmd', '--annotate', '--config-file', 'NOT_A_FILE']
-        with mock.patch('sys.argv', myargs):
+        myargs = ["mycmd", "--annotate", "--config-file", "NOT_A_FILE"]
+        with mock.patch("sys.argv", myargs):
             with pytest.raises(SystemExit) as context_manager:
                 main()
         assert 1 == context_manager.value.code
         _out, err = capsys.readouterr()
-        assert 'Error:\nConfigfile NOT_A_FILE does not exist\n' == err
+        assert "Error:\nConfigfile NOT_A_FILE does not exist\n" == err
 
     def test_main_prints_docs(self, capsys):
         """When --docs parameter is provided, main generates documentation."""
-        myargs = ['mycmd', '--docs', 'all']
-        with mock.patch('sys.argv', myargs):
-            assert 0 == main(), 'Expected 0 exit code'
+        myargs = ["mycmd", "--docs", "all"]
+        with mock.patch("sys.argv", myargs):
+            assert 0 == main(), "Expected 0 exit code"
         out, _err = capsys.readouterr()
-        assert '\nNTP\n---\n' in out
-        assert '\nRuncmd\n------\n' in out
+        assert "\nNTP\n---\n" in out
+        assert "\nRuncmd\n------\n" in out
 
     def test_main_validates_config_file(self, tmpdir, capsys):
         """When --config-file parameter is provided, main validates schema."""
-        myyaml = tmpdir.join('my.yaml')
-        myargs = ['mycmd', '--config-file', myyaml.strpath]
-        myyaml.write(b'#cloud-config\nntp:')  # shortest ntp schema
-        with mock.patch('sys.argv', myargs):
-            assert 0 == main(), 'Expected 0 exit code'
+        myyaml = tmpdir.join("my.yaml")
+        myargs = ["mycmd", "--config-file", myyaml.strpath]
+        myyaml.write(b"#cloud-config\nntp:")  # shortest ntp schema
+        with mock.patch("sys.argv", myargs):
+            assert 0 == main(), "Expected 0 exit code"
         out, _err = capsys.readouterr()
-        assert 'Valid cloud-config: {0}\n'.format(myyaml) == out
+        assert "Valid cloud-config: {0}\n".format(myyaml) == out
 
-    @mock.patch('cloudinit.config.schema.read_cfg_paths')
-    @mock.patch('cloudinit.config.schema.os.getuid', return_value=0)
+    @mock.patch("cloudinit.config.schema.read_cfg_paths")
+    @mock.patch("cloudinit.config.schema.os.getuid", return_value=0)
     def test_main_validates_system_userdata(
         self, m_getuid, m_read_cfg_paths, capsys, paths
     ):
         """When --system is provided, main validates system userdata."""
         m_read_cfg_paths.return_value = paths
         ud_file = paths.get_ipath_cur("userdata_raw")
-        write_file(ud_file, b'#cloud-config\nntp:')
-        myargs = ['mycmd', '--system']
-        with mock.patch('sys.argv', myargs):
-            assert 0 == main(), 'Expected 0 exit code'
+        write_file(ud_file, b"#cloud-config\nntp:")
+        myargs = ["mycmd", "--system"]
+        with mock.patch("sys.argv", myargs):
+            assert 0 == main(), "Expected 0 exit code"
         out, _err = capsys.readouterr()
-        assert 'Valid cloud-config: system userdata\n' == out
+        assert "Valid cloud-config: system userdata\n" == out
 
-    @mock.patch('cloudinit.config.schema.os.getuid', return_value=1000)
+    @mock.patch("cloudinit.config.schema.os.getuid", return_value=1000)
     def test_main_system_userdata_requires_root(self, m_getuid, capsys, paths):
         """Non-root user can't use --system param"""
-        myargs = ['mycmd', '--system']
-        with mock.patch('sys.argv', myargs):
+        myargs = ["mycmd", "--system"]
+        with mock.patch("sys.argv", myargs):
             with pytest.raises(SystemExit) as context_manager:
                 main()
         assert 1 == context_manager.value.code
         _out, err = capsys.readouterr()
         expected = (
-            'Error:\nUnable to read system userdata as non-root user. '
-            'Try using sudo\n'
+            "Error:\nUnable to read system userdata as non-root user. "
+            "Try using sudo\n"
         )
         assert expected == err
 
 
 def _get_meta_doc_examples():
-    examples_dir = Path(cloud_init_project_dir('doc/examples'))
+    examples_dir = Path(cloud_init_project_dir("doc/examples"))
     assert examples_dir.is_dir()
 
     return (
@@ -712,7 +759,7 @@ class TestStrictMetaschema:
         }
         with pytest.raises(
             SchemaValidationError,
-            match=(r"Additional properties are not allowed.*")
+            match=r"Additional properties are not allowed.*",
         ):
 
             validate_cloudconfig_metaschema(validator, schema)
diff --git a/tests/unittests/distros/__init__.py b/tests/unittests/distros/__init__.py
index 5394aa56..e66b9446 100644
--- a/tests/unittests/distros/__init__.py
+++ b/tests/unittests/distros/__init__.py
@@ -1,9 +1,7 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 import copy
 
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import settings
+from cloudinit import distros, helpers, settings
 
 
 def _get_distro(dtype, system_info=None):
@@ -14,8 +12,8 @@ def _get_distro(dtype, system_info=None):
     example: _get_distro("debian")
     """
     if system_info is None:
-        system_info = copy.deepcopy(settings.CFG_BUILTIN['system_info'])
-    system_info['distro'] = dtype
-    paths = helpers.Paths(system_info['paths'])
+        system_info = copy.deepcopy(settings.CFG_BUILTIN["system_info"])
+    system_info["distro"] = dtype
+    paths = helpers.Paths(system_info["paths"])
     distro_cls = distros.fetch(dtype)
     return distro_cls(dtype, system_info, paths)
diff --git a/tests/unittests/distros/test_arch.py b/tests/unittests/distros/test_arch.py
index 590ba00e..5446295e 100644
--- a/tests/unittests/distros/test_arch.py
+++ b/tests/unittests/distros/test_arch.py
@@ -1,15 +1,13 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.distros.arch import _render_network
 from cloudinit import util
-
-from tests.unittests.helpers import (CiTestCase, dir2dict)
+from cloudinit.distros.arch import _render_network
+from tests.unittests.helpers import CiTestCase, dir2dict
 
 from . import _get_distro
 
 
 class TestArch(CiTestCase):
-
     def test_get_distro(self):
         distro = _get_distro("arch")
         hostname = "myhostname"
@@ -23,23 +21,35 @@ class TestRenderNetwork(CiTestCase):
         """Just the most basic static config.
 
         note 'lo' should not be rendered as an interface."""
-        entries = {'eth0': {'auto': True,
-                            'dns-nameservers': ['8.8.8.8'],
-                            'bootproto': 'static',
-                            'address': '10.0.0.2',
-                            'gateway': '10.0.0.1',
-                            'netmask': '255.255.255.0'},
-                   'lo': {'auto': True}}
+        entries = {
+            "eth0": {
+                "auto": True,
+                "dns-nameservers": ["8.8.8.8"],
+                "bootproto": "static",
+                "address": "10.0.0.2",
+                "gateway": "10.0.0.1",
+                "netmask": "255.255.255.0",
+            },
+            "lo": {"auto": True},
+        }
         target = self.tmp_dir()
         devs = _render_network(entries, target=target)
         files = dir2dict(target, prefix=target)
-        self.assertEqual(['eth0'], devs)
+        self.assertEqual(["eth0"], devs)
         self.assertEqual(
-            {'/etc/netctl/eth0': '\n'.join([
-                "Address=10.0.0.2/255.255.255.0",
-                "Connection=ethernet",
-                "DNS=('8.8.8.8')",
-                "Gateway=10.0.0.1",
-                "IP=static",
-                "Interface=eth0", ""]),
-             '/etc/resolv.conf': 'nameserver 8.8.8.8\n'}, files)
+            {
+                "/etc/netctl/eth0": "\n".join(
+                    [
+                        "Address=10.0.0.2/255.255.255.0",
+                        "Connection=ethernet",
+                        "DNS=('8.8.8.8')",
+                        "Gateway=10.0.0.1",
+                        "IP=static",
+                        "Interface=eth0",
+                        "",
+                    ]
+                ),
+                "/etc/resolv.conf": "nameserver 8.8.8.8\n",
+            },
+            files,
+        )
diff --git a/tests/unittests/distros/test_bsd_utils.py b/tests/unittests/distros/test_bsd_utils.py
index 55686dc9..d6f0aeed 100644
--- a/tests/unittests/distros/test_bsd_utils.py
+++ b/tests/unittests/distros/test_bsd_utils.py
@@ -1,8 +1,7 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import cloudinit.distros.bsd_utils as bsd_utils
-
-from tests.unittests.helpers import (CiTestCase, ExitStack, mock)
+from tests.unittests.helpers import CiTestCase, ExitStack, mock
 
 RC_FILE = """
 if something; then
@@ -13,55 +12,55 @@ hostname={hostname}
 
 
 class TestBsdUtils(CiTestCase):
-
     def setUp(self):
         super().setUp()
         patches = ExitStack()
         self.addCleanup(patches.close)
 
         self.load_file = patches.enter_context(
-            mock.patch.object(bsd_utils.util, 'load_file'))
+            mock.patch.object(bsd_utils.util, "load_file")
+        )
 
         self.write_file = patches.enter_context(
-            mock.patch.object(bsd_utils.util, 'write_file'))
+            mock.patch.object(bsd_utils.util, "write_file")
+        )
 
     def test_get_rc_config_value(self):
-        self.load_file.return_value = 'hostname=foo\n'
-        self.assertEqual(bsd_utils.get_rc_config_value('hostname'), 'foo')
-        self.load_file.assert_called_with('/etc/rc.conf')
+        self.load_file.return_value = "hostname=foo\n"
+        self.assertEqual(bsd_utils.get_rc_config_value("hostname"), "foo")
+        self.load_file.assert_called_with("/etc/rc.conf")
 
-        self.load_file.return_value = 'hostname=foo'
-        self.assertEqual(bsd_utils.get_rc_config_value('hostname'), 'foo')
+        self.load_file.return_value = "hostname=foo"
+        self.assertEqual(bsd_utils.get_rc_config_value("hostname"), "foo")
 
         self.load_file.return_value = 'hostname="foo"'
-        self.assertEqual(bsd_utils.get_rc_config_value('hostname'), 'foo')
+        self.assertEqual(bsd_utils.get_rc_config_value("hostname"), "foo")
 
         self.load_file.return_value = "hostname='foo'"
-        self.assertEqual(bsd_utils.get_rc_config_value('hostname'), 'foo')
+        self.assertEqual(bsd_utils.get_rc_config_value("hostname"), "foo")
 
-        self.load_file.return_value = 'hostname=\'foo"'
-        self.assertEqual(bsd_utils.get_rc_config_value('hostname'), "'foo\"")
+        self.load_file.return_value = "hostname='foo\""
+        self.assertEqual(bsd_utils.get_rc_config_value("hostname"), "'foo\"")
 
-        self.load_file.return_value = ''
-        self.assertEqual(bsd_utils.get_rc_config_value('hostname'), None)
+        self.load_file.return_value = ""
+        self.assertEqual(bsd_utils.get_rc_config_value("hostname"), None)
 
-        self.load_file.return_value = RC_FILE.format(hostname='foo')
-        self.assertEqual(bsd_utils.get_rc_config_value('hostname'), "foo")
+        self.load_file.return_value = RC_FILE.format(hostname="foo")
+        self.assertEqual(bsd_utils.get_rc_config_value("hostname"), "foo")
 
     def test_set_rc_config_value_unchanged(self):
         # bsd_utils.set_rc_config_value('hostname', 'foo')
         # self.write_file.assert_called_with('/etc/rc.conf', 'hostname=foo\n')
 
-        self.load_file.return_value = RC_FILE.format(hostname='foo')
+        self.load_file.return_value = RC_FILE.format(hostname="foo")
         self.write_file.assert_not_called()
 
     def test_set_rc_config_value(self):
-        bsd_utils.set_rc_config_value('hostname', 'foo')
-        self.write_file.assert_called_with('/etc/rc.conf', 'hostname=foo\n')
+        bsd_utils.set_rc_config_value("hostname", "foo")
+        self.write_file.assert_called_with("/etc/rc.conf", "hostname=foo\n")
 
-        self.load_file.return_value = RC_FILE.format(hostname='foo')
-        bsd_utils.set_rc_config_value('hostname', 'bar')
+        self.load_file.return_value = RC_FILE.format(hostname="foo")
+        bsd_utils.set_rc_config_value("hostname", "bar")
         self.write_file.assert_called_with(
-            '/etc/rc.conf',
-            RC_FILE.format(hostname='bar')
+            "/etc/rc.conf", RC_FILE.format(hostname="bar")
         )
diff --git a/tests/unittests/distros/test_create_users.py b/tests/unittests/distros/test_create_users.py
index 5baa8a4b..ddb039bd 100644
--- a/tests/unittests/distros/test_create_users.py
+++ b/tests/unittests/distros/test_create_users.py
@@ -2,9 +2,8 @@
 
 import re
 
-from cloudinit import distros
-from cloudinit import ssh_util
-from tests.unittests.helpers import (CiTestCase, mock)
+from cloudinit import distros, ssh_util
+from tests.unittests.helpers import CiTestCase, mock
 from tests.unittests.util import abstract_to_concrete
 
 
@@ -17,220 +16,267 @@ class TestCreateUser(CiTestCase):
     def setUp(self):
         super(TestCreateUser, self).setUp()
         self.dist = abstract_to_concrete(distros.Distro)(
-            name='test', cfg=None, paths=None
+            name="test", cfg=None, paths=None
         )
 
     def _useradd2call(self, args):
         # return a mock call for the useradd command in args
         # with expected 'logstring'.
-        args = ['useradd'] + args
+        args = ["useradd"] + args
         logcmd = [a for a in args]
         for i in range(len(args)):
-            if args[i] in ('--password',):
-                logcmd[i + 1] = 'REDACTED'
+            if args[i] in ("--password",):
+                logcmd[i + 1] = "REDACTED"
         return mock.call(args, logstring=logcmd)
 
     def test_basic(self, m_subp, m_is_snappy):
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user)
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '-m']),
-             mock.call(['passwd', '-l', user])])
+            [
+                self._useradd2call([user, "-m"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
 
     def test_no_home(self, m_subp, m_is_snappy):
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user, no_create_home=True)
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '-M']),
-             mock.call(['passwd', '-l', user])])
+            [
+                self._useradd2call([user, "-M"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
 
     def test_system_user(self, m_subp, m_is_snappy):
         # system user should have no home and get --system
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user, system=True)
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '--system', '-M']),
-             mock.call(['passwd', '-l', user])])
+            [
+                self._useradd2call([user, "--system", "-M"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
 
     def test_explicit_no_home_false(self, m_subp, m_is_snappy):
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user, no_create_home=False)
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '-m']),
-             mock.call(['passwd', '-l', user])])
+            [
+                self._useradd2call([user, "-m"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
 
     def test_unlocked(self, m_subp, m_is_snappy):
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user, lock_passwd=False)
         self.assertEqual(
-            m_subp.call_args_list,
-            [self._useradd2call([user, '-m'])])
+            m_subp.call_args_list, [self._useradd2call([user, "-m"])]
+        )
 
     def test_set_password(self, m_subp, m_is_snappy):
-        user = 'foouser'
-        password = 'passfoo'
+        user = "foouser"
+        password = "passfoo"
         self.dist.create_user(user, passwd=password)
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '--password', password, '-m']),
-             mock.call(['passwd', '-l', user])])
+            [
+                self._useradd2call([user, "--password", password, "-m"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
 
     @mock.patch("cloudinit.distros.util.is_group")
     def test_group_added(self, m_is_group, m_subp, m_is_snappy):
         m_is_group.return_value = False
-        user = 'foouser'
-        self.dist.create_user(user, groups=['group1'])
+        user = "foouser"
+        self.dist.create_user(user, groups=["group1"])
         expected = [
-            mock.call(['groupadd', 'group1']),
-            self._useradd2call([user, '--groups', 'group1', '-m']),
-            mock.call(['passwd', '-l', user])]
+            mock.call(["groupadd", "group1"]),
+            self._useradd2call([user, "--groups", "group1", "-m"]),
+            mock.call(["passwd", "-l", user]),
+        ]
         self.assertEqual(m_subp.call_args_list, expected)
 
     @mock.patch("cloudinit.distros.util.is_group")
     def test_only_new_group_added(self, m_is_group, m_subp, m_is_snappy):
-        ex_groups = ['existing_group']
-        groups = ['group1', ex_groups[0]]
+        ex_groups = ["existing_group"]
+        groups = ["group1", ex_groups[0]]
         m_is_group.side_effect = lambda m: m in ex_groups
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user, groups=groups)
         expected = [
-            mock.call(['groupadd', 'group1']),
-            self._useradd2call([user, '--groups', ','.join(groups), '-m']),
-            mock.call(['passwd', '-l', user])]
+            mock.call(["groupadd", "group1"]),
+            self._useradd2call([user, "--groups", ",".join(groups), "-m"]),
+            mock.call(["passwd", "-l", user]),
+        ]
         self.assertEqual(m_subp.call_args_list, expected)
 
     @mock.patch("cloudinit.distros.util.is_group")
     def test_create_groups_with_whitespace_string(
-            self, m_is_group, m_subp, m_is_snappy):
+        self, m_is_group, m_subp, m_is_snappy
+    ):
         # groups supported as a comma delimeted string even with white space
         m_is_group.return_value = False
-        user = 'foouser'
-        self.dist.create_user(user, groups='group1, group2')
+        user = "foouser"
+        self.dist.create_user(user, groups="group1, group2")
         expected = [
-            mock.call(['groupadd', 'group1']),
-            mock.call(['groupadd', 'group2']),
-            self._useradd2call([user, '--groups', 'group1,group2', '-m']),
-            mock.call(['passwd', '-l', user])]
+            mock.call(["groupadd", "group1"]),
+            mock.call(["groupadd", "group2"]),
+            self._useradd2call([user, "--groups", "group1,group2", "-m"]),
+            mock.call(["passwd", "-l", user]),
+        ]
         self.assertEqual(m_subp.call_args_list, expected)
 
     def test_explicit_sudo_false(self, m_subp, m_is_snappy):
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user, sudo=False)
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '-m']),
-             mock.call(['passwd', '-l', user])])
+            [
+                self._useradd2call([user, "-m"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
 
-    @mock.patch('cloudinit.ssh_util.setup_user_keys')
+    @mock.patch("cloudinit.ssh_util.setup_user_keys")
     def test_setup_ssh_authorized_keys_with_string(
-            self, m_setup_user_keys, m_subp, m_is_snappy):
+        self, m_setup_user_keys, m_subp, m_is_snappy
+    ):
         """ssh_authorized_keys allows string and calls setup_user_keys."""
-        user = 'foouser'
-        self.dist.create_user(user, ssh_authorized_keys='mykey')
+        user = "foouser"
+        self.dist.create_user(user, ssh_authorized_keys="mykey")
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '-m']),
-             mock.call(['passwd', '-l', user])])
-        m_setup_user_keys.assert_called_once_with(set(['mykey']), user)
+            [
+                self._useradd2call([user, "-m"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
+        m_setup_user_keys.assert_called_once_with(set(["mykey"]), user)
 
-    @mock.patch('cloudinit.ssh_util.setup_user_keys')
+    @mock.patch("cloudinit.ssh_util.setup_user_keys")
     def test_setup_ssh_authorized_keys_with_list(
-            self, m_setup_user_keys, m_subp, m_is_snappy):
+        self, m_setup_user_keys, m_subp, m_is_snappy
+    ):
         """ssh_authorized_keys allows lists and calls setup_user_keys."""
-        user = 'foouser'
-        self.dist.create_user(user, ssh_authorized_keys=['key1', 'key2'])
+        user = "foouser"
+        self.dist.create_user(user, ssh_authorized_keys=["key1", "key2"])
         self.assertEqual(
             m_subp.call_args_list,
-            [self._useradd2call([user, '-m']),
-             mock.call(['passwd', '-l', user])])
-        m_setup_user_keys.assert_called_once_with(set(['key1', 'key2']), user)
+            [
+                self._useradd2call([user, "-m"]),
+                mock.call(["passwd", "-l", user]),
+            ],
+        )
+        m_setup_user_keys.assert_called_once_with(set(["key1", "key2"]), user)
 
-    @mock.patch('cloudinit.ssh_util.setup_user_keys')
+    @mock.patch("cloudinit.ssh_util.setup_user_keys")
     def test_setup_ssh_authorized_keys_with_integer(
-            self, m_setup_user_keys, m_subp, m_is_snappy):
+        self, m_setup_user_keys, m_subp, m_is_snappy
+    ):
         """ssh_authorized_keys warns on non-iterable/string type."""
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(user, ssh_authorized_keys=-1)
         m_setup_user_keys.assert_called_once_with(set([]), user)
         match = re.match(
-            r'.*WARNING: Invalid type \'<(type|class) \'int\'>\' detected for'
-            ' \'ssh_authorized_keys\'.*',
+            r".*WARNING: Invalid type \'<(type|class) \'int\'>\' detected for"
+            " 'ssh_authorized_keys'.*",
             self.logs.getvalue(),
-            re.DOTALL)
+            re.DOTALL,
+        )
         self.assertIsNotNone(
-            match, 'Missing ssh_authorized_keys invalid type warning')
+            match, "Missing ssh_authorized_keys invalid type warning"
+        )
 
-    @mock.patch('cloudinit.ssh_util.setup_user_keys')
+    @mock.patch("cloudinit.ssh_util.setup_user_keys")
     def test_create_user_with_ssh_redirect_user_no_cloud_keys(
-            self, m_setup_user_keys, m_subp, m_is_snappy):
+        self, m_setup_user_keys, m_subp, m_is_snappy
+    ):
         """Log a warning when trying to redirect a user no cloud ssh keys."""
-        user = 'foouser'
-        self.dist.create_user(user, ssh_redirect_user='someuser')
+        user = "foouser"
+        self.dist.create_user(user, ssh_redirect_user="someuser")
         self.assertIn(
-            'WARNING: Unable to disable SSH logins for foouser given '
-            'ssh_redirect_user: someuser. No cloud public-keys present.\n',
-            self.logs.getvalue())
+            "WARNING: Unable to disable SSH logins for foouser given "
+            "ssh_redirect_user: someuser. No cloud public-keys present.\n",
+            self.logs.getvalue(),
+        )
         m_setup_user_keys.assert_not_called()
 
-    @mock.patch('cloudinit.ssh_util.setup_user_keys')
+    @mock.patch("cloudinit.ssh_util.setup_user_keys")
     def test_create_user_with_ssh_redirect_user_with_cloud_keys(
-            self, m_setup_user_keys, m_subp, m_is_snappy):
+        self, m_setup_user_keys, m_subp, m_is_snappy
+    ):
         """Disable ssh when ssh_redirect_user and cloud ssh keys are set."""
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(
-            user, ssh_redirect_user='someuser', cloud_public_ssh_keys=['key1'])
+            user, ssh_redirect_user="someuser", cloud_public_ssh_keys=["key1"]
+        )
         disable_prefix = ssh_util.DISABLE_USER_OPTS
-        disable_prefix = disable_prefix.replace('$USER', 'someuser')
-        disable_prefix = disable_prefix.replace('$DISABLE_USER', user)
+        disable_prefix = disable_prefix.replace("$USER", "someuser")
+        disable_prefix = disable_prefix.replace("$DISABLE_USER", user)
         m_setup_user_keys.assert_called_once_with(
-            set(['key1']), 'foouser', options=disable_prefix)
+            set(["key1"]), "foouser", options=disable_prefix
+        )
 
-    @mock.patch('cloudinit.ssh_util.setup_user_keys')
+    @mock.patch("cloudinit.ssh_util.setup_user_keys")
     def test_create_user_with_ssh_redirect_user_does_not_disable_auth_keys(
-            self, m_setup_user_keys, m_subp, m_is_snappy):
+        self, m_setup_user_keys, m_subp, m_is_snappy
+    ):
         """Do not disable ssh_authorized_keys when ssh_redirect_user is set."""
-        user = 'foouser'
+        user = "foouser"
         self.dist.create_user(
-            user, ssh_authorized_keys='auth1', ssh_redirect_user='someuser',
-            cloud_public_ssh_keys=['key1'])
+            user,
+            ssh_authorized_keys="auth1",
+            ssh_redirect_user="someuser",
+            cloud_public_ssh_keys=["key1"],
+        )
         disable_prefix = ssh_util.DISABLE_USER_OPTS
-        disable_prefix = disable_prefix.replace('$USER', 'someuser')
-        disable_prefix = disable_prefix.replace('$DISABLE_USER', user)
+        disable_prefix = disable_prefix.replace("$USER", "someuser")
+        disable_prefix = disable_prefix.replace("$DISABLE_USER", user)
         self.assertEqual(
             m_setup_user_keys.call_args_list,
-            [mock.call(set(['auth1']), user),  # not disabled
-             mock.call(set(['key1']), 'foouser', options=disable_prefix)])
+            [
+                mock.call(set(["auth1"]), user),  # not disabled
+                mock.call(set(["key1"]), "foouser", options=disable_prefix),
+            ],
+        )
 
     @mock.patch("cloudinit.distros.subp.which")
-    def test_lock_with_usermod_if_no_passwd(self, m_which, m_subp,
-                                            m_is_snappy):
+    def test_lock_with_usermod_if_no_passwd(
+        self, m_which, m_subp, m_is_snappy
+    ):
         """Lock uses usermod --lock if no 'passwd' cmd available."""
-        m_which.side_effect = lambda m: m in ('usermod',)
+        m_which.side_effect = lambda m: m in ("usermod",)
         self.dist.lock_passwd("bob")
         self.assertEqual(
-            [mock.call(['usermod', '--lock', 'bob'])],
-            m_subp.call_args_list)
+            [mock.call(["usermod", "--lock", "bob"])], m_subp.call_args_list
+        )
 
     @mock.patch("cloudinit.distros.subp.which")
-    def test_lock_with_passwd_if_available(self, m_which, m_subp,
-                                           m_is_snappy):
+    def test_lock_with_passwd_if_available(self, m_which, m_subp, m_is_snappy):
         """Lock with only passwd will use passwd."""
-        m_which.side_effect = lambda m: m in ('passwd',)
+        m_which.side_effect = lambda m: m in ("passwd",)
         self.dist.lock_passwd("bob")
         self.assertEqual(
-            [mock.call(['passwd', '-l', 'bob'])],
-            m_subp.call_args_list)
+            [mock.call(["passwd", "-l", "bob"])], m_subp.call_args_list
+        )
 
     @mock.patch("cloudinit.distros.subp.which")
-    def test_lock_raises_runtime_if_no_commands(self, m_which, m_subp,
-                                                m_is_snappy):
+    def test_lock_raises_runtime_if_no_commands(
+        self, m_which, m_subp, m_is_snappy
+    ):
         """Lock with no commands available raises RuntimeError."""
         m_which.return_value = None
         with self.assertRaises(RuntimeError):
             self.dist.lock_passwd("bob")
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/distros/test_debian.py b/tests/unittests/distros/test_debian.py
index 3d0db145..c7c5932e 100644
--- a/tests/unittests/distros/test_debian.py
+++ b/tests/unittests/distros/test_debian.py
@@ -4,92 +4,117 @@ from unittest import mock
 
 import pytest
 
-from cloudinit import distros, util
-from cloudinit.distros.debian import (
-    APT_GET_COMMAND,
-    APT_GET_WRAPPER,
-)
+from cloudinit import distros, subp, util
+from cloudinit.distros.debian import APT_GET_COMMAND, APT_GET_WRAPPER
 from tests.unittests.helpers import FilesystemMockingTestCase
-from cloudinit import subp
 
 
 @mock.patch("cloudinit.distros.debian.subp.subp")
 class TestDebianApplyLocale(FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestDebianApplyLocale, self).setUp()
         self.new_root = self.tmp_dir()
         self.patchOS(self.new_root)
         self.patchUtils(self.new_root)
-        self.spath = self.tmp_path('etc/default/locale', self.new_root)
+        self.spath = self.tmp_path("etc/default/locale", self.new_root)
         cls = distros.fetch("debian")
         self.distro = cls("debian", {}, None)
 
     def test_no_rerun(self, m_subp):
         """If system has defined locale, no re-run is expected."""
         m_subp.return_value = (None, None)
-        locale = 'en_US.UTF-8'
-        util.write_file(self.spath, 'LANG=%s\n' % locale, omode="w")
+        locale = "en_US.UTF-8"
+        util.write_file(self.spath, "LANG=%s\n" % locale, omode="w")
         self.distro.apply_locale(locale, out_fn=self.spath)
         m_subp.assert_not_called()
 
     def test_no_regen_on_c_utf8(self, m_subp):
         """If locale is set to C.UTF8, do not attempt to call locale-gen"""
         m_subp.return_value = (None, None)
-        locale = 'C.UTF-8'
-        util.write_file(self.spath, 'LANG=%s\n' % 'en_US.UTF-8', omode="w")
+        locale = "C.UTF-8"
+        util.write_file(self.spath, "LANG=%s\n" % "en_US.UTF-8", omode="w")
         self.distro.apply_locale(locale, out_fn=self.spath)
         self.assertEqual(
-            [['update-locale', '--locale-file=' + self.spath,
-              'LANG=%s' % locale]],
-            [p[0][0] for p in m_subp.call_args_list])
+            [
+                [
+                    "update-locale",
+                    "--locale-file=" + self.spath,
+                    "LANG=%s" % locale,
+                ]
+            ],
+            [p[0][0] for p in m_subp.call_args_list],
+        )
 
     def test_rerun_if_different(self, m_subp):
         """If system has different locale, locale-gen should be called."""
         m_subp.return_value = (None, None)
-        locale = 'en_US.UTF-8'
-        util.write_file(self.spath, 'LANG=fr_FR.UTF-8', omode="w")
+        locale = "en_US.UTF-8"
+        util.write_file(self.spath, "LANG=fr_FR.UTF-8", omode="w")
         self.distro.apply_locale(locale, out_fn=self.spath)
         self.assertEqual(
-            [['locale-gen', locale],
-             ['update-locale', '--locale-file=' + self.spath,
-              'LANG=%s' % locale]],
-            [p[0][0] for p in m_subp.call_args_list])
+            [
+                ["locale-gen", locale],
+                [
+                    "update-locale",
+                    "--locale-file=" + self.spath,
+                    "LANG=%s" % locale,
+                ],
+            ],
+            [p[0][0] for p in m_subp.call_args_list],
+        )
 
     def test_rerun_if_no_file(self, m_subp):
         """If system has no locale file, locale-gen should be called."""
         m_subp.return_value = (None, None)
-        locale = 'en_US.UTF-8'
+        locale = "en_US.UTF-8"
         self.distro.apply_locale(locale, out_fn=self.spath)
         self.assertEqual(
-            [['locale-gen', locale],
-             ['update-locale', '--locale-file=' + self.spath,
-              'LANG=%s' % locale]],
-            [p[0][0] for p in m_subp.call_args_list])
+            [
+                ["locale-gen", locale],
+                [
+                    "update-locale",
+                    "--locale-file=" + self.spath,
+                    "LANG=%s" % locale,
+                ],
+            ],
+            [p[0][0] for p in m_subp.call_args_list],
+        )
 
     def test_rerun_on_unset_system_locale(self, m_subp):
         """If system has unset locale, locale-gen should be called."""
         m_subp.return_value = (None, None)
-        locale = 'en_US.UTF-8'
-        util.write_file(self.spath, 'LANG=', omode="w")
+        locale = "en_US.UTF-8"
+        util.write_file(self.spath, "LANG=", omode="w")
         self.distro.apply_locale(locale, out_fn=self.spath)
         self.assertEqual(
-            [['locale-gen', locale],
-             ['update-locale', '--locale-file=' + self.spath,
-              'LANG=%s' % locale]],
-            [p[0][0] for p in m_subp.call_args_list])
+            [
+                ["locale-gen", locale],
+                [
+                    "update-locale",
+                    "--locale-file=" + self.spath,
+                    "LANG=%s" % locale,
+                ],
+            ],
+            [p[0][0] for p in m_subp.call_args_list],
+        )
 
     def test_rerun_on_mismatched_keys(self, m_subp):
         """If key is LC_ALL and system has only LANG, rerun is expected."""
         m_subp.return_value = (None, None)
-        locale = 'en_US.UTF-8'
-        util.write_file(self.spath, 'LANG=', omode="w")
-        self.distro.apply_locale(locale, out_fn=self.spath, keyname='LC_ALL')
+        locale = "en_US.UTF-8"
+        util.write_file(self.spath, "LANG=", omode="w")
+        self.distro.apply_locale(locale, out_fn=self.spath, keyname="LC_ALL")
         self.assertEqual(
-            [['locale-gen', locale],
-             ['update-locale', '--locale-file=' + self.spath,
-              'LC_ALL=%s' % locale]],
-            [p[0][0] for p in m_subp.call_args_list])
+            [
+                ["locale-gen", locale],
+                [
+                    "update-locale",
+                    "--locale-file=" + self.spath,
+                    "LC_ALL=%s" % locale,
+                ],
+            ],
+            [p[0][0] for p in m_subp.call_args_list],
+        )
 
     def test_falseish_locale_raises_valueerror(self, m_subp):
         """locale as None or "" is invalid and should raise ValueError."""
@@ -99,45 +124,53 @@ class TestDebianApplyLocale(FilesystemMockingTestCase):
             m_subp.assert_not_called()
 
         self.assertEqual(
-            'Failed to provide locale value.', str(ctext_m.exception))
+            "Failed to provide locale value.", str(ctext_m.exception)
+        )
 
         with self.assertRaises(ValueError) as ctext_m:
             self.distro.apply_locale("")
             m_subp.assert_not_called()
         self.assertEqual(
-            'Failed to provide locale value.', str(ctext_m.exception))
+            "Failed to provide locale value.", str(ctext_m.exception)
+        )
 
 
-@mock.patch.dict('os.environ', {}, clear=True)
+@mock.patch.dict("os.environ", {}, clear=True)
 @mock.patch("cloudinit.distros.debian.subp.which", return_value=True)
 @mock.patch("cloudinit.distros.debian.subp.subp")
 class TestPackageCommand:
     distro = distros.fetch("debian")("debian", {}, None)
 
-    @mock.patch("cloudinit.distros.debian.Distro._apt_lock_available",
-                return_value=True)
+    @mock.patch(
+        "cloudinit.distros.debian.Distro._apt_lock_available",
+        return_value=True,
+    )
     def test_simple_command(self, m_apt_avail, m_subp, m_which):
-        self.distro.package_command('update')
-        apt_args = [APT_GET_WRAPPER['command']]
+        self.distro.package_command("update")
+        apt_args = [APT_GET_WRAPPER["command"]]
         apt_args.extend(APT_GET_COMMAND)
-        apt_args.append('update')
+        apt_args.append("update")
         expected_call = {
-            'args': apt_args,
-            'capture': False,
-            'env': {'DEBIAN_FRONTEND': 'noninteractive'},
+            "args": apt_args,
+            "capture": False,
+            "env": {"DEBIAN_FRONTEND": "noninteractive"},
         }
         assert m_subp.call_args == mock.call(**expected_call)
 
-    @mock.patch("cloudinit.distros.debian.Distro._apt_lock_available",
-                side_effect=[False, False, True])
+    @mock.patch(
+        "cloudinit.distros.debian.Distro._apt_lock_available",
+        side_effect=[False, False, True],
+    )
     @mock.patch("cloudinit.distros.debian.time.sleep")
     def test_wait_for_lock(self, m_sleep, m_apt_avail, m_subp, m_which):
         self.distro._wait_for_apt_command("stub", {"args": "stub2"})
         assert m_sleep.call_args_list == [mock.call(1), mock.call(1)]
-        assert m_subp.call_args_list == [mock.call(args='stub2')]
+        assert m_subp.call_args_list == [mock.call(args="stub2")]
 
-    @mock.patch("cloudinit.distros.debian.Distro._apt_lock_available",
-                return_value=False)
+    @mock.patch(
+        "cloudinit.distros.debian.Distro._apt_lock_available",
+        return_value=False,
+    )
     @mock.patch("cloudinit.distros.debian.time.sleep")
     @mock.patch("cloudinit.distros.debian.time.time", side_effect=count())
     def test_lock_wait_timeout(
@@ -147,8 +180,10 @@ class TestPackageCommand:
             self.distro._wait_for_apt_command("stub", "stub2", timeout=5)
         assert m_subp.call_args_list == []
 
-    @mock.patch("cloudinit.distros.debian.Distro._apt_lock_available",
-                side_effect=cycle([True, False]))
+    @mock.patch(
+        "cloudinit.distros.debian.Distro._apt_lock_available",
+        side_effect=cycle([True, False]),
+    )
     @mock.patch("cloudinit.distros.debian.time.sleep")
     def test_lock_exception_wait(self, m_sleep, m_apt_avail, m_subp, m_which):
         exception = subp.ProcessExecutionError(
@@ -158,8 +193,10 @@ class TestPackageCommand:
         ret = self.distro._wait_for_apt_command("stub", {"args": "stub2"})
         assert ret == "return_thing"
 
-    @mock.patch("cloudinit.distros.debian.Distro._apt_lock_available",
-                side_effect=cycle([True, False]))
+    @mock.patch(
+        "cloudinit.distros.debian.Distro._apt_lock_available",
+        side_effect=cycle([True, False]),
+    )
     @mock.patch("cloudinit.distros.debian.time.sleep")
     @mock.patch("cloudinit.distros.debian.time.time", side_effect=count())
     def test_lock_exception_timeout(
diff --git a/tests/unittests/distros/test_freebsd.py b/tests/unittests/distros/test_freebsd.py
index 0279e86f..22be5098 100644
--- a/tests/unittests/distros/test_freebsd.py
+++ b/tests/unittests/distros/test_freebsd.py
@@ -1,45 +1,43 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.util import (find_freebsd_part, get_path_dev_freebsd)
-from tests.unittests.helpers import (CiTestCase, mock)
-
 import os
 
+from cloudinit.util import find_freebsd_part, get_path_dev_freebsd
+from tests.unittests.helpers import CiTestCase, mock
 
-class TestDeviceLookUp(CiTestCase):
 
-    @mock.patch('cloudinit.subp.subp')
+class TestDeviceLookUp(CiTestCase):
+    @mock.patch("cloudinit.subp.subp")
     def test_find_freebsd_part_label(self, mock_subp):
-        glabel_out = '''
+        glabel_out = """
 gptid/fa52d426-c337-11e6-8911-00155d4c5e47  N/A  da0p1
                               label/rootfs  N/A  da0p2
                                 label/swap  N/A  da0p3
-'''
+"""
         mock_subp.return_value = (glabel_out, "")
         res = find_freebsd_part("/dev/label/rootfs")
         self.assertEqual("da0p2", res)
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_find_freebsd_part_gpt(self, mock_subp):
-        glabel_out = '''
+        glabel_out = """
                                 gpt/bootfs  N/A  vtbd0p1
 gptid/3f4cbe26-75da-11e8-a8f2-002590ec6166  N/A  vtbd0p1
                                 gpt/swapfs  N/A  vtbd0p2
                                 gpt/rootfs  N/A  vtbd0p3
                             iso9660/cidata  N/A  vtbd2
-'''
+"""
         mock_subp.return_value = (glabel_out, "")
         res = find_freebsd_part("/dev/gpt/rootfs")
         self.assertEqual("vtbd0p3", res)
 
     def test_get_path_dev_freebsd_label(self):
-        mnt_list = '''
+        mnt_list = """
 /dev/label/rootfs  /                ufs     rw              1 1
 devfs              /dev             devfs   rw,multilabel   0 0
 fdescfs            /dev/fd          fdescfs rw              0 0
 /dev/da1s1         /mnt/resource    ufs     rw              2 2
-'''
-        with mock.patch.object(os.path, 'exists',
-                               return_value=True):
-            res = get_path_dev_freebsd('/etc', mnt_list)
+"""
+        with mock.patch.object(os.path, "exists", return_value=True):
+            res = get_path_dev_freebsd("/etc", mnt_list)
             self.assertIsNotNone(res)
diff --git a/tests/unittests/distros/test_generic.py b/tests/unittests/distros/test_generic.py
index e542c26f..93c5395c 100644
--- a/tests/unittests/distros/test_generic.py
+++ b/tests/unittests/distros/test_generic.py
@@ -1,35 +1,49 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import distros
-from cloudinit import util
-
-from tests.unittests import helpers
-
 import os
-import pytest
 import shutil
 import tempfile
 from unittest import mock
 
+import pytest
+
+from cloudinit import distros, util
+from tests.unittests import helpers
+
 unknown_arch_info = {
-    'arches': ['default'],
-    'failsafe': {'primary': 'http://fs-primary-default',
-                 'security': 'http://fs-security-default'}
+    "arches": ["default"],
+    "failsafe": {
+        "primary": "http://fs-primary-default",
+        "security": "http://fs-security-default",
+    },
 }
 
 package_mirrors = [
-    {'arches': ['i386', 'amd64'],
-     'failsafe': {'primary': 'http://fs-primary-intel',
-                  'security': 'http://fs-security-intel'},
-     'search': {
-         'primary': ['http://%(ec2_region)s.ec2/',
-                     'http://%(availability_zone)s.clouds/'],
-         'security': ['http://security-mirror1-intel',
-                      'http://security-mirror2-intel']}},
-    {'arches': ['armhf', 'armel'],
-     'failsafe': {'primary': 'http://fs-primary-arm',
-                  'security': 'http://fs-security-arm'}},
-    unknown_arch_info
+    {
+        "arches": ["i386", "amd64"],
+        "failsafe": {
+            "primary": "http://fs-primary-intel",
+            "security": "http://fs-security-intel",
+        },
+        "search": {
+            "primary": [
+                "http://%(ec2_region)s.ec2/",
+                "http://%(availability_zone)s.clouds/",
+            ],
+            "security": [
+                "http://security-mirror1-intel",
+                "http://security-mirror2-intel",
+            ],
+        },
+    },
+    {
+        "arches": ["armhf", "armel"],
+        "failsafe": {
+            "primary": "http://fs-primary-arm",
+            "security": "http://fs-security-arm",
+        },
+    },
+    unknown_arch_info,
 ]
 
 gpmi = distros._get_package_mirror_info
@@ -37,7 +51,6 @@ gapmi = distros._get_arch_package_mirror_info
 
 
 class TestGenericDistro(helpers.FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestGenericDistro, self).setUp()
         # Make a temp directoy for tests to use.
@@ -48,7 +61,7 @@ class TestGenericDistro(helpers.FilesystemMockingTestCase):
         cls = distros.fetch("ubuntu")
         d = cls("ubuntu", {}, None)
         os.makedirs(os.path.join(self.tmp, "etc"))
-        os.makedirs(os.path.join(self.tmp, "etc", 'sudoers.d'))
+        os.makedirs(os.path.join(self.tmp, "etc", "sudoers.d"))
         self.patchOS(self.tmp)
         self.patchUtils(self.tmp)
         d.write_sudo_rules("harlowja", rules)
@@ -65,34 +78,34 @@ class TestGenericDistro(helpers.FilesystemMockingTestCase):
         return found_amount
 
     def test_sudoers_ensure_rules(self):
-        rules = 'ALL=(ALL:ALL) ALL'
-        contents = self._write_load_sudoers('harlowja', rules)
-        expected = ['harlowja ALL=(ALL:ALL) ALL']
+        rules = "ALL=(ALL:ALL) ALL"
+        contents = self._write_load_sudoers("harlowja", rules)
+        expected = ["harlowja ALL=(ALL:ALL) ALL"]
         self.assertEqual(len(expected), self._count_in(expected, contents))
         not_expected = [
-            'harlowja A',
-            'harlowja L',
-            'harlowja L',
+            "harlowja A",
+            "harlowja L",
+            "harlowja L",
         ]
         self.assertEqual(0, self._count_in(not_expected, contents))
 
     def test_sudoers_ensure_rules_list(self):
         rules = [
-            'ALL=(ALL:ALL) ALL',
-            'B-ALL=(ALL:ALL) ALL',
-            'C-ALL=(ALL:ALL) ALL',
+            "ALL=(ALL:ALL) ALL",
+            "B-ALL=(ALL:ALL) ALL",
+            "C-ALL=(ALL:ALL) ALL",
         ]
-        contents = self._write_load_sudoers('harlowja', rules)
+        contents = self._write_load_sudoers("harlowja", rules)
         expected = [
-            'harlowja ALL=(ALL:ALL) ALL',
-            'harlowja B-ALL=(ALL:ALL) ALL',
-            'harlowja C-ALL=(ALL:ALL) ALL',
+            "harlowja ALL=(ALL:ALL) ALL",
+            "harlowja B-ALL=(ALL:ALL) ALL",
+            "harlowja C-ALL=(ALL:ALL) ALL",
         ]
         self.assertEqual(len(expected), self._count_in(expected, contents))
         not_expected = [
-            'harlowja A',
-            'harlowja L',
-            'harlowja L',
+            "harlowja A",
+            "harlowja L",
+            "harlowja L",
         ]
         self.assertEqual(0, self._count_in(not_expected, contents))
 
@@ -124,7 +137,7 @@ class TestGenericDistro(helpers.FilesystemMockingTestCase):
         d = cls("ubuntu", {}, None)
         self.patchOS(self.tmp)
         self.patchUtils(self.tmp)
-        for char in ['#', '@']:
+        for char in ["#", "@"]:
             util.write_file("/etc/sudoers", "{}includedir /b".format(char))
             d.ensure_sudo_dir("/b")
             contents = util.load_file("/etc/sudoers")
@@ -146,7 +159,7 @@ class TestGenericDistro(helpers.FilesystemMockingTestCase):
         d = cls("ubuntu", {}, None)
         self.patchOS(self.tmp)
         self.patchUtils(self.tmp)
-        os.makedirs('/run/systemd/system')
+        os.makedirs("/run/systemd/system")
         self.assertTrue(d.uses_systemd())
 
     def test_systemd_not_in_use(self):
@@ -161,18 +174,18 @@ class TestGenericDistro(helpers.FilesystemMockingTestCase):
         d = cls("ubuntu", {}, None)
         self.patchOS(self.tmp)
         self.patchUtils(self.tmp)
-        os.makedirs('/run/systemd')
-        os.symlink('/', '/run/systemd/system')
+        os.makedirs("/run/systemd")
+        os.symlink("/", "/run/systemd/system")
         self.assertFalse(d.uses_systemd())
 
-    @mock.patch('cloudinit.distros.debian.read_system_locale')
+    @mock.patch("cloudinit.distros.debian.read_system_locale")
     def test_get_locale_ubuntu(self, m_locale):
         """Test ubuntu distro returns locale set to C.UTF-8"""
-        m_locale.return_value = 'C.UTF-8'
+        m_locale.return_value = "C.UTF-8"
         cls = distros.fetch("ubuntu")
         d = cls("ubuntu", {}, None)
         locale = d.get_locale()
-        self.assertEqual('C.UTF-8', locale)
+        self.assertEqual("C.UTF-8", locale)
 
     def test_get_locale_rhel(self):
         """Test rhel distro returns NotImplementedError exception"""
@@ -197,11 +210,11 @@ class TestGenericDistro(helpers.FilesystemMockingTestCase):
         with mock.patch("cloudinit.subp.subp") as m_subp:
             d.expire_passwd("myuser")
         m_subp.assert_called_once_with(
-            ["pw", "usermod", "myuser", "-p", "01-Jan-1970"])
+            ["pw", "usermod", "myuser", "-p", "01-Jan-1970"]
+        )
 
 
 class TestGetPackageMirrors:
-
     def return_first(self, mlist):
         if not mlist:
             return None
@@ -219,77 +232,125 @@ class TestGetPackageMirrors:
     def return_last(self, mlist):
         if not mlist:
             return None
-        return(mlist[-1])
+        return mlist[-1]
 
     @pytest.mark.parametrize(
         "allow_ec2_mirror, platform_type, mirrors",
         [
-            (True, "ec2", [
-                {'primary': 'http://us-east-1.ec2/',
-                 'security': 'http://security-mirror1-intel'},
-                {'primary': 'http://us-east-1a.clouds/',
-                 'security': 'http://security-mirror2-intel'}
-            ]),
-            (True, "other", [
-                {'primary': 'http://us-east-1.ec2/',
-                 'security': 'http://security-mirror1-intel'},
-                {'primary': 'http://us-east-1a.clouds/',
-                 'security': 'http://security-mirror2-intel'}
-            ]),
-            (False, "ec2", [
-                {'primary': 'http://us-east-1.ec2/',
-                 'security': 'http://security-mirror1-intel'},
-                {'primary': 'http://us-east-1a.clouds/',
-                 'security': 'http://security-mirror2-intel'}
-            ]),
-            (False, "other", [
-                {'primary': 'http://us-east-1a.clouds/',
-                 'security': 'http://security-mirror1-intel'},
-                {'primary': 'http://fs-primary-intel',
-                 'security': 'http://security-mirror2-intel'}
-            ])
-        ])
-    def test_get_package_mirror_info_az_ec2(self,
-                                            allow_ec2_mirror,
-                                            platform_type,
-                                            mirrors):
-        flag_path = "cloudinit.distros." \
-                    "ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES"
+            (
+                True,
+                "ec2",
+                [
+                    {
+                        "primary": "http://us-east-1.ec2/",
+                        "security": "http://security-mirror1-intel",
+                    },
+                    {
+                        "primary": "http://us-east-1a.clouds/",
+                        "security": "http://security-mirror2-intel",
+                    },
+                ],
+            ),
+            (
+                True,
+                "other",
+                [
+                    {
+                        "primary": "http://us-east-1.ec2/",
+                        "security": "http://security-mirror1-intel",
+                    },
+                    {
+                        "primary": "http://us-east-1a.clouds/",
+                        "security": "http://security-mirror2-intel",
+                    },
+                ],
+            ),
+            (
+                False,
+                "ec2",
+                [
+                    {
+                        "primary": "http://us-east-1.ec2/",
+                        "security": "http://security-mirror1-intel",
+                    },
+                    {
+                        "primary": "http://us-east-1a.clouds/",
+                        "security": "http://security-mirror2-intel",
+                    },
+                ],
+            ),
+            (
+                False,
+                "other",
+                [
+                    {
+                        "primary": "http://us-east-1a.clouds/",
+                        "security": "http://security-mirror1-intel",
+                    },
+                    {
+                        "primary": "http://fs-primary-intel",
+                        "security": "http://security-mirror2-intel",
+                    },
+                ],
+            ),
+        ],
+    )
+    def test_get_package_mirror_info_az_ec2(
+        self, allow_ec2_mirror, platform_type, mirrors
+    ):
+        flag_path = (
+            "cloudinit.distros.ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES"
+        )
         with mock.patch(flag_path, allow_ec2_mirror):
             arch_mirrors = gapmi(package_mirrors, arch="amd64")
             data_source_mock = mock.Mock(
-                availability_zone="us-east-1a",
-                platform_type=platform_type)
-
-            results = gpmi(arch_mirrors, data_source=data_source_mock,
-                           mirror_filter=self.return_first)
-            assert(results == mirrors[0])
-
-            results = gpmi(arch_mirrors, data_source=data_source_mock,
-                           mirror_filter=self.return_second)
-            assert(results == mirrors[1])
-
-            results = gpmi(arch_mirrors, data_source=data_source_mock,
-                           mirror_filter=self.return_none)
-            assert(results == package_mirrors[0]['failsafe'])
+                availability_zone="us-east-1a", platform_type=platform_type
+            )
+
+            results = gpmi(
+                arch_mirrors,
+                data_source=data_source_mock,
+                mirror_filter=self.return_first,
+            )
+            assert results == mirrors[0]
+
+            results = gpmi(
+                arch_mirrors,
+                data_source=data_source_mock,
+                mirror_filter=self.return_second,
+            )
+            assert results == mirrors[1]
+
+            results = gpmi(
+                arch_mirrors,
+                data_source=data_source_mock,
+                mirror_filter=self.return_none,
+            )
+            assert results == package_mirrors[0]["failsafe"]
 
     def test_get_package_mirror_info_az_non_ec2(self):
         arch_mirrors = gapmi(package_mirrors, arch="amd64")
         data_source_mock = mock.Mock(availability_zone="nova.cloudvendor")
 
-        results = gpmi(arch_mirrors, data_source=data_source_mock,
-                       mirror_filter=self.return_first)
-        assert(results == {
-            'primary': 'http://nova.cloudvendor.clouds/',
-            'security': 'http://security-mirror1-intel'}
+        results = gpmi(
+            arch_mirrors,
+            data_source=data_source_mock,
+            mirror_filter=self.return_first,
         )
-
-        results = gpmi(arch_mirrors, data_source=data_source_mock,
-                       mirror_filter=self.return_last)
-        assert(results == {
-            'primary': 'http://nova.cloudvendor.clouds/',
-            'security': 'http://security-mirror2-intel'}
+        assert results == {
+            "primary": "http://nova.cloudvendor.clouds/",
+            "security": "http://security-mirror1-intel",
+        }
+
+        results = gpmi(
+            arch_mirrors,
+            data_source=data_source_mock,
+            mirror_filter=self.return_last,
         )
+        assert results == {
+            "primary": "http://nova.cloudvendor.clouds/",
+            "security": "http://security-mirror2-intel",
+        }
 
     def test_get_package_mirror_info_none(self):
         arch_mirrors = gapmi(package_mirrors, arch="amd64")
@@ -298,18 +359,25 @@ class TestGetPackageMirrors:
         # because both search entries here replacement based on
         # availability-zone, the filter will be called with an empty list and
         # failsafe should be taken.
-        results = gpmi(arch_mirrors, data_source=data_source_mock,
-                       mirror_filter=self.return_first)
-        assert(results == {
-            'primary': 'http://fs-primary-intel',
-            'security': 'http://security-mirror1-intel'}
+        results = gpmi(
+            arch_mirrors,
+            data_source=data_source_mock,
+            mirror_filter=self.return_first,
         )
-
-        results = gpmi(arch_mirrors, data_source=data_source_mock,
-                       mirror_filter=self.return_last)
-        assert(results == {
-            'primary': 'http://fs-primary-intel',
-            'security': 'http://security-mirror2-intel'}
+        assert results == {
+            "primary": "http://fs-primary-intel",
+            "security": "http://security-mirror1-intel",
+        }
+
+        results = gpmi(
+            arch_mirrors,
+            data_source=data_source_mock,
+            mirror_filter=self.return_last,
         )
+        assert results == {
+            "primary": "http://fs-primary-intel",
+            "security": "http://security-mirror2-intel",
+        }
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/distros/test_gentoo.py b/tests/unittests/distros/test_gentoo.py
index 4e4680b8..dadf5df5 100644
--- a/tests/unittests/distros/test_gentoo.py
+++ b/tests/unittests/distros/test_gentoo.py
@@ -1,13 +1,12 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import util
-from cloudinit import atomic_helper
+from cloudinit import atomic_helper, util
 from tests.unittests.helpers import CiTestCase
+
 from . import _get_distro
 
 
 class TestGentoo(CiTestCase):
-
     def test_write_hostname(self):
         distro = _get_distro("gentoo")
         hostname = "myhostname"
@@ -22,5 +21,7 @@ class TestGentoo(CiTestCase):
         hostfile = self.tmp_path("hostfile")
         atomic_helper.write_file(hostfile, contents, omode="w")
         distro._write_hostname(hostname, hostfile)
-        self.assertEqual('#This is the hostname\nhostname="myhostname"\n',
-                         util.load_file(hostfile))
+        self.assertEqual(
+            '#This is the hostname\nhostname="myhostname"\n',
+            util.load_file(hostfile),
+        )
diff --git a/tests/unittests/distros/test_hostname.py b/tests/unittests/distros/test_hostname.py
index f6d4dbe5..2cbbb3e2 100644
--- a/tests/unittests/distros/test_hostname.py
+++ b/tests/unittests/distros/test_hostname.py
@@ -4,13 +4,12 @@ import unittest
 
 from cloudinit.distros.parsers import hostname
 
-
-BASE_HOSTNAME = '''
+BASE_HOSTNAME = """
 # My super-duper-hostname
 
 blahblah
 
-'''
+"""
 BASE_HOSTNAME = BASE_HOSTNAME.strip()
 
 
@@ -18,7 +17,7 @@ class TestHostnameHelper(unittest.TestCase):
     def test_parse_same(self):
         hn = hostname.HostnameConf(BASE_HOSTNAME)
         self.assertEqual(str(hn).strip(), BASE_HOSTNAME)
-        self.assertEqual(hn.hostname, 'blahblah')
+        self.assertEqual(hn.hostname, "blahblah")
 
     def test_no_adjust_hostname(self):
         hn = hostname.HostnameConf(BASE_HOSTNAME)
@@ -29,14 +28,15 @@ class TestHostnameHelper(unittest.TestCase):
     def test_adjust_hostname(self):
         hn = hostname.HostnameConf(BASE_HOSTNAME)
         prev_name = hn.hostname
-        self.assertEqual(prev_name, 'blahblah')
+        self.assertEqual(prev_name, "blahblah")
         hn.set_hostname("bbbbd")
-        self.assertEqual(hn.hostname, 'bbbbd')
-        expected_out = '''
+        self.assertEqual(hn.hostname, "bbbbd")
+        expected_out = """
 # My super-duper-hostname
 
 bbbbd
-'''
+"""
         self.assertEqual(str(hn).strip(), expected_out.strip())
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/distros/test_hosts.py b/tests/unittests/distros/test_hosts.py
index 8aaa6e48..faffd912 100644
--- a/tests/unittests/distros/test_hosts.py
+++ b/tests/unittests/distros/test_hosts.py
@@ -4,42 +4,44 @@ import unittest
 
 from cloudinit.distros.parsers import hosts
 
-
-BASE_ETC = '''
+BASE_ETC = """
 # Example
 127.0.0.1	localhost
 192.168.1.10	foo.mydomain.org  foo
 192.168.1.10 	bar.mydomain.org  bar
 146.82.138.7	master.debian.org      master
 209.237.226.90	www.opensource.org
-'''
+"""
 BASE_ETC = BASE_ETC.strip()
 
 
 class TestHostsHelper(unittest.TestCase):
     def test_parse(self):
         eh = hosts.HostsConf(BASE_ETC)
-        self.assertEqual(eh.get_entry('127.0.0.1'), [['localhost']])
-        self.assertEqual(eh.get_entry('192.168.1.10'),
-                         [['foo.mydomain.org', 'foo'],
-                          ['bar.mydomain.org', 'bar']])
+        self.assertEqual(eh.get_entry("127.0.0.1"), [["localhost"]])
+        self.assertEqual(
+            eh.get_entry("192.168.1.10"),
+            [["foo.mydomain.org", "foo"], ["bar.mydomain.org", "bar"]],
+        )
         eh = str(eh)
-        self.assertTrue(eh.startswith('# Example'))
+        self.assertTrue(eh.startswith("# Example"))
 
     def test_add(self):
         eh = hosts.HostsConf(BASE_ETC)
-        eh.add_entry('127.0.0.0', 'blah')
-        self.assertEqual(eh.get_entry('127.0.0.0'), [['blah']])
-        eh.add_entry('127.0.0.3', 'blah', 'blah2', 'blah3')
-        self.assertEqual(eh.get_entry('127.0.0.3'),
-                         [['blah', 'blah2', 'blah3']])
+        eh.add_entry("127.0.0.0", "blah")
+        self.assertEqual(eh.get_entry("127.0.0.0"), [["blah"]])
+        eh.add_entry("127.0.0.3", "blah", "blah2", "blah3")
+        self.assertEqual(
+            eh.get_entry("127.0.0.3"), [["blah", "blah2", "blah3"]]
+        )
 
     def test_del(self):
         eh = hosts.HostsConf(BASE_ETC)
-        eh.add_entry('127.0.0.0', 'blah')
-        self.assertEqual(eh.get_entry('127.0.0.0'), [['blah']])
+        eh.add_entry("127.0.0.0", "blah")
+        self.assertEqual(eh.get_entry("127.0.0.0"), [["blah"]])
+
+        eh.del_entries("127.0.0.0")
+        self.assertEqual(eh.get_entry("127.0.0.0"), [])
 
-        eh.del_entries('127.0.0.0')
-        self.assertEqual(eh.get_entry('127.0.0.0'), [])
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/distros/test_init.py b/tests/unittests/distros/test_init.py
index fd64a322..8f3c8978 100644
--- a/tests/unittests/distros/test_init.py
+++ b/tests/unittests/distros/test_init.py
@@ -9,16 +9,17 @@ from unittest import mock
 
 import pytest
 
-from cloudinit.distros import _get_package_mirror_info, LDH_ASCII_CHARS
+from cloudinit.distros import LDH_ASCII_CHARS, _get_package_mirror_info
 
 # In newer versions of Python, these characters will be omitted instead
 # of substituted because of security concerns.
 # See https://bugs.python.org/issue43882
-SECURITY_URL_CHARS = '\n\r\t'
+SECURITY_URL_CHARS = "\n\r\t"
 
 # Define a set of characters we would expect to be replaced
 INVALID_URL_CHARS = [
-    chr(x) for x in range(127)
+    chr(x)
+    for x in range(127)
     if chr(x) not in LDH_ASCII_CHARS + SECURITY_URL_CHARS
 ]
 for separator in [":", ".", "/", "#", "?", "@", "[", "]"]:
@@ -37,21 +38,41 @@ class TestGetPackageMirrorInfo:
     These tests are more focused on specific aspects of the unit under test.
     """
 
-    @pytest.mark.parametrize('mirror_info,expected', [
-        # Empty info gives empty return
-        ({}, {}),
-        # failsafe values used if present
-        ({'failsafe': {'primary': 'http://value', 'security': 'http://other'}},
-         {'primary': 'http://value', 'security': 'http://other'}),
-        # search values used if present
-        ({'search': {'primary': ['http://value'],
-                     'security': ['http://other']}},
-         {'primary': ['http://value'], 'security': ['http://other']}),
-        # failsafe values used if search value not present
-        ({'search': {'primary': ['http://value']},
-          'failsafe': {'security': 'http://other'}},
-         {'primary': ['http://value'], 'security': 'http://other'})
-    ])
+    @pytest.mark.parametrize(
+        "mirror_info,expected",
+        [
+            # Empty info gives empty return
+            ({}, {}),
+            # failsafe values used if present
+            (
+                {
+                    "failsafe": {
+                        "primary": "http://value",
+                        "security": "http://other",
+                    }
+                },
+                {"primary": "http://value", "security": "http://other"},
+            ),
+            # search values used if present
+            (
+                {
+                    "search": {
+                        "primary": ["http://value"],
+                        "security": ["http://other"],
+                    }
+                },
+                {"primary": ["http://value"], "security": ["http://other"]},
+            ),
+            # failsafe values used if search value not present
+            (
+                {
+                    "search": {"primary": ["http://value"]},
+                    "failsafe": {"security": "http://other"},
+                },
+                {"primary": ["http://value"], "security": "http://other"},
+            ),
+        ],
+    )
     def test_get_package_mirror_info_failsafe(self, mirror_info, expected):
         """
         Test the interaction between search and failsafe inputs
@@ -60,97 +81,163 @@ class TestGetPackageMirrorInfo:
         options; test_failsafe_used_if_all_search_results_filtered_out covers
         that.)
         """
-        assert expected == _get_package_mirror_info(mirror_info,
-                                                    mirror_filter=lambda x: x)
+        assert expected == _get_package_mirror_info(
+            mirror_info, mirror_filter=lambda x: x
+        )
 
     def test_failsafe_used_if_all_search_results_filtered_out(self):
         """Test the failsafe option used if all search options eliminated."""
         mirror_info = {
-            'search': {'primary': ['http://value']},
-            'failsafe': {'primary': 'http://other'}
+            "search": {"primary": ["http://value"]},
+            "failsafe": {"primary": "http://other"},
         }
-        assert {'primary': 'http://other'} == _get_package_mirror_info(
-            mirror_info, mirror_filter=lambda x: False)
+        assert {"primary": "http://other"} == _get_package_mirror_info(
+            mirror_info, mirror_filter=lambda x: False
+        )
 
-    @pytest.mark.parametrize('allow_ec2_mirror, platform_type', [
-        (True, 'ec2')
-    ])
-    @pytest.mark.parametrize('availability_zone,region,patterns,expected', (
-        # Test ec2_region alone
-        ('fk-fake-1f', None, ['http://EC2-%(ec2_region)s/ubuntu'],
-         ['http://ec2-fk-fake-1/ubuntu']),
-        # Test availability_zone alone
-        ('fk-fake-1f', None, ['http://AZ-%(availability_zone)s/ubuntu'],
-         ['http://az-fk-fake-1f/ubuntu']),
-        # Test region alone
-        (None, 'fk-fake-1', ['http://RG-%(region)s/ubuntu'],
-         ['http://rg-fk-fake-1/ubuntu']),
-        # Test that ec2_region is not available for non-matching AZs
-        ('fake-fake-1f', None,
-         ['http://EC2-%(ec2_region)s/ubuntu',
-          'http://AZ-%(availability_zone)s/ubuntu'],
-         ['http://az-fake-fake-1f/ubuntu']),
-        # Test that template order maintained
-        (None, 'fake-region',
-         ['http://RG-%(region)s-2/ubuntu', 'http://RG-%(region)s-1/ubuntu'],
-         ['http://rg-fake-region-2/ubuntu', 'http://rg-fake-region-1/ubuntu']),
-        # Test that non-ASCII hostnames are IDNA encoded;
-        # "IDNA-ТεЅТ̣".encode('idna') == b"xn--idna--4kd53hh6aba3q"
-        (None, 'ТεЅТ̣', ['http://www.IDNA-%(region)s.com/ubuntu'],
-         ['http://www.xn--idna--4kd53hh6aba3q.com/ubuntu']),
-        # Test that non-ASCII hostnames with a port are IDNA encoded;
-        # "IDNA-ТεЅТ̣".encode('idna') == b"xn--idna--4kd53hh6aba3q"
-        (None, 'ТεЅТ̣', ['http://www.IDNA-%(region)s.com:8080/ubuntu'],
-         ['http://www.xn--idna--4kd53hh6aba3q.com:8080/ubuntu']),
-        # Test that non-ASCII non-hostname parts of URLs are unchanged
-        (None, 'ТεЅТ̣', ['http://www.example.com/%(region)s/ubuntu'],
-         ['http://www.example.com/ТεЅТ̣/ubuntu']),
-        # Test that IPv4 addresses are unchanged
-        (None, 'fk-fake-1', ['http://192.168.1.1:8080/%(region)s/ubuntu'],
-         ['http://192.168.1.1:8080/fk-fake-1/ubuntu']),
-        # Test that IPv6 addresses are unchanged
-        (None, 'fk-fake-1',
-         ['http://[2001:67c:1360:8001::23]/%(region)s/ubuntu'],
-         ['http://[2001:67c:1360:8001::23]/fk-fake-1/ubuntu']),
-        # Test that unparseable URLs are filtered out of the mirror list
-        (None, 'inv[lid',
-         ['http://%(region)s.in.hostname/should/be/filtered',
-          'http://but.not.in.the.path/%(region)s'],
-         ['http://but.not.in.the.path/inv[lid']),
-        (None, '-some-region-',
-         ['http://-lead-ing.%(region)s.trail-ing-.example.com/ubuntu'],
-         ['http://lead-ing.some-region.trail-ing.example.com/ubuntu']),
-    ) + tuple(
-        # Dynamically generate a test case for each non-LDH
-        # (Letters/Digits/Hyphen) ASCII character, testing that it is
-        # substituted with a hyphen
-        (None, 'fk{0}fake{0}1'.format(invalid_char),
-         ['http://%(region)s/ubuntu'], ['http://fk-fake-1/ubuntu'])
-        for invalid_char in INVALID_URL_CHARS
-    ))
-    def test_valid_substitution(self,
-                                allow_ec2_mirror,
-                                platform_type,
-                                availability_zone,
-                                region,
-                                patterns,
-                                expected):
+    @pytest.mark.parametrize(
+        "allow_ec2_mirror, platform_type", [(True, "ec2")]
+    )
+    @pytest.mark.parametrize(
+        "availability_zone,region,patterns,expected",
+        (
+            # Test ec2_region alone
+            (
+                "fk-fake-1f",
+                None,
+                ["http://EC2-%(ec2_region)s/ubuntu"],
+                ["http://ec2-fk-fake-1/ubuntu"],
+            ),
+            # Test availability_zone alone
+            (
+                "fk-fake-1f",
+                None,
+                ["http://AZ-%(availability_zone)s/ubuntu"],
+                ["http://az-fk-fake-1f/ubuntu"],
+            ),
+            # Test region alone
+            (
+                None,
+                "fk-fake-1",
+                ["http://RG-%(region)s/ubuntu"],
+                ["http://rg-fk-fake-1/ubuntu"],
+            ),
+            # Test that ec2_region is not available for non-matching AZs
+            (
+                "fake-fake-1f",
+                None,
+                [
+                    "http://EC2-%(ec2_region)s/ubuntu",
+                    "http://AZ-%(availability_zone)s/ubuntu",
+                ],
+                ["http://az-fake-fake-1f/ubuntu"],
+            ),
+            # Test that template order maintained
+            (
+                None,
+                "fake-region",
+                [
+                    "http://RG-%(region)s-2/ubuntu",
+                    "http://RG-%(region)s-1/ubuntu",
+                ],
+                [
+                    "http://rg-fake-region-2/ubuntu",
+                    "http://rg-fake-region-1/ubuntu",
+                ],
+            ),
+            # Test that non-ASCII hostnames are IDNA encoded;
+            # "IDNA-ТεЅТ̣".encode('idna') == b"xn--idna--4kd53hh6aba3q"
+            (
+                None,
+                "ТεЅТ̣",
+                ["http://www.IDNA-%(region)s.com/ubuntu"],
+                ["http://www.xn--idna--4kd53hh6aba3q.com/ubuntu"],
+            ),
+            # Test that non-ASCII hostnames with a port are IDNA encoded;
+            # "IDNA-ТεЅТ̣".encode('idna') == b"xn--idna--4kd53hh6aba3q"
+            (
+                None,
+                "ТεЅТ̣",
+                ["http://www.IDNA-%(region)s.com:8080/ubuntu"],
+                ["http://www.xn--idna--4kd53hh6aba3q.com:8080/ubuntu"],
+            ),
+            # Test that non-ASCII non-hostname parts of URLs are unchanged
+            (
+                None,
+                "ТεЅТ̣",
+                ["http://www.example.com/%(region)s/ubuntu"],
+                ["http://www.example.com/ТεЅТ̣/ubuntu"],
+            ),
+            # Test that IPv4 addresses are unchanged
+            (
+                None,
+                "fk-fake-1",
+                ["http://192.168.1.1:8080/%(region)s/ubuntu"],
+                ["http://192.168.1.1:8080/fk-fake-1/ubuntu"],
+            ),
+            # Test that IPv6 addresses are unchanged
+            (
+                None,
+                "fk-fake-1",
+                ["http://[2001:67c:1360:8001::23]/%(region)s/ubuntu"],
+                ["http://[2001:67c:1360:8001::23]/fk-fake-1/ubuntu"],
+            ),
+            # Test that unparseable URLs are filtered out of the mirror list
+            (
+                None,
+                "inv[lid",
+                [
+                    "http://%(region)s.in.hostname/should/be/filtered",
+                    "http://but.not.in.the.path/%(region)s",
+                ],
+                ["http://but.not.in.the.path/inv[lid"],
+            ),
+            (
+                None,
+                "-some-region-",
+                ["http://-lead-ing.%(region)s.trail-ing-.example.com/ubuntu"],
+                ["http://lead-ing.some-region.trail-ing.example.com/ubuntu"],
+            ),
+        )
+        + tuple(
+            # Dynamically generate a test case for each non-LDH
+            # (Letters/Digits/Hyphen) ASCII character, testing that it is
+            # substituted with a hyphen
+            (
+                None,
+                "fk{0}fake{0}1".format(invalid_char),
+                ["http://%(region)s/ubuntu"],
+                ["http://fk-fake-1/ubuntu"],
+            )
+            for invalid_char in INVALID_URL_CHARS
+        ),
+    )
+    def test_valid_substitution(
+        self,
+        allow_ec2_mirror,
+        platform_type,
+        availability_zone,
+        region,
+        patterns,
+        expected,
+    ):
         """Test substitution works as expected."""
-        flag_path = "cloudinit.distros." \
-                    "ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES"
+        flag_path = (
+            "cloudinit.distros.ALLOW_EC2_MIRRORS_ON_NON_AWS_INSTANCE_TYPES"
+        )
 
         m_data_source = mock.Mock(
             availability_zone=availability_zone,
             region=region,
-            platform_type=platform_type
+            platform_type=platform_type,
         )
-        mirror_info = {'search': {'primary': patterns}}
+        mirror_info = {"search": {"primary": patterns}}
 
         with mock.patch(flag_path, allow_ec2_mirror):
             ret = _get_package_mirror_info(
                 mirror_info,
                 data_source=m_data_source,
-                mirror_filter=lambda x: x
+                mirror_filter=lambda x: x,
             )
         print(allow_ec2_mirror)
         print(platform_type)
@@ -158,4 +245,4 @@ class TestGetPackageMirrorInfo:
         print(region)
         print(patterns)
         print(expected)
-        assert {'primary': expected} == ret
+        assert {"primary": expected} == ret
diff --git a/tests/unittests/distros/test_manage_service.py b/tests/unittests/distros/test_manage_service.py
index 6f1bd0b1..9e64b35c 100644
--- a/tests/unittests/distros/test_manage_service.py
+++ b/tests/unittests/distros/test_manage_service.py
@@ -1,6 +1,6 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from tests.unittests.helpers import (CiTestCase, mock)
+from tests.unittests.helpers import CiTestCase, mock
 from tests.unittests.util import MockDistro
 
 
@@ -12,27 +12,30 @@ class TestManageService(CiTestCase):
         super(TestManageService, self).setUp()
         self.dist = MockDistro()
 
-    @mock.patch.object(MockDistro, 'uses_systemd', return_value=False)
+    @mock.patch.object(MockDistro, "uses_systemd", return_value=False)
     @mock.patch("cloudinit.distros.subp.subp")
     def test_manage_service_systemctl_initcmd(self, m_subp, m_sysd):
-        self.dist.init_cmd = ['systemctl']
-        self.dist.manage_service('start', 'myssh')
-        m_subp.assert_called_with(['systemctl', 'start', 'myssh'],
-                                  capture=True)
+        self.dist.init_cmd = ["systemctl"]
+        self.dist.manage_service("start", "myssh")
+        m_subp.assert_called_with(
+            ["systemctl", "start", "myssh"], capture=True
+        )
 
-    @mock.patch.object(MockDistro, 'uses_systemd', return_value=False)
+    @mock.patch.object(MockDistro, "uses_systemd", return_value=False)
     @mock.patch("cloudinit.distros.subp.subp")
     def test_manage_service_service_initcmd(self, m_subp, m_sysd):
-        self.dist.init_cmd = ['service']
-        self.dist.manage_service('start', 'myssh')
-        m_subp.assert_called_with(['service', 'myssh', 'start'], capture=True)
+        self.dist.init_cmd = ["service"]
+        self.dist.manage_service("start", "myssh")
+        m_subp.assert_called_with(["service", "myssh", "start"], capture=True)
 
-    @mock.patch.object(MockDistro, 'uses_systemd', return_value=True)
+    @mock.patch.object(MockDistro, "uses_systemd", return_value=True)
     @mock.patch("cloudinit.distros.subp.subp")
     def test_manage_service_systemctl(self, m_subp, m_sysd):
-        self.dist.init_cmd = ['ignore']
-        self.dist.manage_service('start', 'myssh')
-        m_subp.assert_called_with(['systemctl', 'start', 'myssh'],
-                                  capture=True)
+        self.dist.init_cmd = ["ignore"]
+        self.dist.manage_service("start", "myssh")
+        m_subp.assert_called_with(
+            ["systemctl", "start", "myssh"], capture=True
+        )
+
 
 # vi: ts=4 sw=4 expandtab
diff --git a/tests/unittests/distros/test_netbsd.py b/tests/unittests/distros/test_netbsd.py
index 11a68d2a..0bc6dfbd 100644
--- a/tests/unittests/distros/test_netbsd.py
+++ b/tests/unittests/distros/test_netbsd.py
@@ -1,10 +1,11 @@
-import cloudinit.distros.netbsd
+import unittest.mock as mock
 
 import pytest
-import unittest.mock as mock
+
+import cloudinit.distros.netbsd
 
 
-@pytest.mark.parametrize('with_pkgin', (True, False))
+@pytest.mark.parametrize("with_pkgin", (True, False))
 @mock.patch("cloudinit.distros.netbsd.os")
 def test_init(m_os, with_pkgin):
     print(with_pkgin)
@@ -12,6 +13,6 @@ def test_init(m_os, with_pkgin):
     cfg = {}
 
     distro = cloudinit.distros.netbsd.NetBSD("netbsd", cfg, None)
-    expectation = ['pkgin', '-y', 'full-upgrade'] if with_pkgin else None
+    expectation = ["pkgin", "-y", "full-upgrade"] if with_pkgin else None
     assert distro.pkg_cmd_upgrade_prefix == expectation
-    assert [mock.call('/usr/pkg/bin/pkgin')] == m_os.path.exists.call_args_list
+    assert [mock.call("/usr/pkg/bin/pkgin")] == m_os.path.exists.call_args_list
diff --git a/tests/unittests/distros/test_netconfig.py b/tests/unittests/distros/test_netconfig.py
index 90ac5578..a25be481 100644
--- a/tests/unittests/distros/test_netconfig.py
+++ b/tests/unittests/distros/test_netconfig.py
@@ -7,17 +7,11 @@ from io import StringIO
 from textwrap import dedent
 from unittest import mock
 
-from cloudinit import distros
+from cloudinit import distros, helpers, safeyaml, settings, subp, util
 from cloudinit.distros.parsers.sys_conf import SysConf
-from cloudinit import helpers
-from cloudinit import settings
-from tests.unittests.helpers import (
-    FilesystemMockingTestCase, dir2dict)
-from cloudinit import subp
-from cloudinit import util
-from cloudinit import safeyaml
-
-BASE_NET_CFG = '''
+from tests.unittests.helpers import FilesystemMockingTestCase, dir2dict
+
+BASE_NET_CFG = """
 auto lo
 iface lo inet loopback
 
@@ -31,9 +25,9 @@ iface eth0 inet static
 
 auto eth1
 iface eth1 inet dhcp
-'''
+"""
 
-BASE_NET_CFG_FROM_V2 = '''
+BASE_NET_CFG_FROM_V2 = """
 auto lo
 iface lo inet loopback
 
@@ -44,9 +38,9 @@ iface eth0 inet static
 
 auto eth1
 iface eth1 inet dhcp
-'''
+"""
 
-BASE_NET_CFG_IPV6 = '''
+BASE_NET_CFG_IPV6 = """
 auto lo
 iface lo inet loopback
 
@@ -74,20 +68,31 @@ iface eth1 inet6 static
     address 2607:f0d0:1002:0011::3
     netmask 64
     gateway 2607:f0d0:1002:0011::1
-'''
-
-V1_NET_CFG = {'config': [{'name': 'eth0',
+"""
 
-                          'subnets': [{'address': '192.168.1.5',
-                                       'broadcast': '192.168.1.0',
-                                       'gateway': '192.168.1.254',
-                                       'netmask': '255.255.255.0',
-                                       'type': 'static'}],
-                          'type': 'physical'},
-                         {'name': 'eth1',
-                          'subnets': [{'control': 'auto', 'type': 'dhcp4'}],
-                          'type': 'physical'}],
-              'version': 1}
+V1_NET_CFG = {
+    "config": [
+        {
+            "name": "eth0",
+            "subnets": [
+                {
+                    "address": "192.168.1.5",
+                    "broadcast": "192.168.1.0",
+                    "gateway": "192.168.1.254",
+                    "netmask": "255.255.255.0",
+                    "type": "static",
+                }
+            ],
+            "type": "physical",
+        },
+        {
+            "name": "eth1",
+            "subnets": [{"control": "auto", "type": "dhcp4"}],
+            "type": "physical",
+        },
+    ],
+    "version": 1,
+}
 
 V1_NET_CFG_WITH_DUPS = """\
 # same value in interface specific dns and global dns
@@ -144,19 +149,28 @@ auto eth1
 iface eth1 inet dhcp
 """
 
-V1_NET_CFG_IPV6 = {'config': [{'name': 'eth0',
-                               'subnets': [{'address':
-                                            '2607:f0d0:1002:0011::2',
-                                            'gateway':
-                                            '2607:f0d0:1002:0011::1',
-                                            'netmask': '64',
-                                            'type': 'static6'}],
-                               'type': 'physical'},
-                              {'name': 'eth1',
-                               'subnets': [{'control': 'auto',
-                                            'type': 'dhcp4'}],
-                               'type': 'physical'}],
-                   'version': 1}
+V1_NET_CFG_IPV6 = {
+    "config": [
+        {
+            "name": "eth0",
+            "subnets": [
+                {
+                    "address": "2607:f0d0:1002:0011::2",
+                    "gateway": "2607:f0d0:1002:0011::1",
+                    "netmask": "64",
+                    "type": "static6",
+                }
+            ],
+            "type": "physical",
+        },
+        {
+            "name": "eth1",
+            "subnets": [{"control": "auto", "type": "dhcp4"}],
+            "type": "physical",
+        },
+    ],
+    "version": 1,
+}
 
 
 V1_TO_V2_NET_CFG_OUTPUT = """\
@@ -194,14 +208,11 @@ network:
 """
 
 V2_NET_CFG = {
-    'ethernets': {
-        'eth7': {
-            'addresses': ['192.168.1.5/24'],
-            'gateway4': '192.168.1.254'},
-        'eth9': {
-            'dhcp4': True}
+    "ethernets": {
+        "eth7": {"addresses": ["192.168.1.5/24"], "gateway4": "192.168.1.254"},
+        "eth9": {"dhcp4": True},
     },
-    'version': 2
+    "version": 2,
 }
 
 
@@ -237,19 +248,18 @@ class WriteBuffer(object):
 
 
 class TestNetCfgDistroBase(FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestNetCfgDistroBase, self).setUp()
-        self.add_patch('cloudinit.util.system_is_snappy', 'm_snappy')
+        self.add_patch("cloudinit.util.system_is_snappy", "m_snappy")
 
     def _get_distro(self, dname, renderers=None):
         cls = distros.fetch(dname)
         cfg = settings.CFG_BUILTIN
-        cfg['system_info']['distro'] = dname
+        cfg["system_info"]["distro"] = dname
         if renderers:
-            cfg['system_info']['network'] = {'renderers': renderers}
+            cfg["system_info"]["network"] = {"renderers": renderers}
         paths = helpers.Paths({})
-        return cls(dname, cfg.get('system_info'), paths)
+        return cls(dname, cfg.get("system_info"), paths)
 
     def assertCfgEquals(self, blob1, blob2):
         b1 = dict(SysConf(blob1.strip().splitlines()))
@@ -264,23 +274,23 @@ class TestNetCfgDistroBase(FilesystemMockingTestCase):
 
 
 class TestNetCfgDistroFreeBSD(TestNetCfgDistroBase):
-
     def setUp(self):
         super(TestNetCfgDistroFreeBSD, self).setUp()
-        self.distro = self._get_distro('freebsd', renderers=['freebsd'])
+        self.distro = self._get_distro("freebsd", renderers=["freebsd"])
 
-    def _apply_and_verify_freebsd(self, apply_fn, config, expected_cfgs=None,
-                                  bringup=False):
+    def _apply_and_verify_freebsd(
+        self, apply_fn, config, expected_cfgs=None, bringup=False
+    ):
         if not expected_cfgs:
-            raise ValueError('expected_cfg must not be None')
+            raise ValueError("expected_cfg must not be None")
 
         tmpd = None
-        with mock.patch('cloudinit.net.freebsd.available') as m_avail:
+        with mock.patch("cloudinit.net.freebsd.available") as m_avail:
             m_avail.return_value = True
             with self.reRooted(tmpd) as tmpd:
-                util.ensure_dir('/etc')
-                util.ensure_file('/etc/rc.conf')
-                util.ensure_file('/etc/resolv.conf')
+                util.ensure_dir("/etc")
+                util.ensure_file("/etc/rc.conf")
+                util.ensure_file("/etc/resolv.conf")
                 apply_fn(config, bringup)
 
         results = dir2dict(tmpd)
@@ -291,14 +301,14 @@ class TestNetCfgDistroFreeBSD(TestNetCfgDistroBase):
             print(results[cfgpath])
             print("----------")
             self.assertEqual(
-                set(expected.split('\n')),
-                set(results[cfgpath].split('\n')))
+                set(expected.split("\n")), set(results[cfgpath].split("\n"))
+            )
             self.assertEqual(0o644, get_mode(cfgpath, tmpd))
 
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_apply_network_config_freebsd_standard(self, ifaces_mac):
         ifaces_mac.return_value = {
-            '00:15:5d:4c:73:00': 'eth0',
+            "00:15:5d:4c:73:00": "eth0",
         }
         rc_conf_expected = """\
 defaultrouter=192.168.1.254
@@ -307,17 +317,19 @@ ifconfig_eth1=DHCP
 """
 
         expected_cfgs = {
-            '/etc/rc.conf': rc_conf_expected,
-            '/etc/resolv.conf': ''
+            "/etc/rc.conf": rc_conf_expected,
+            "/etc/resolv.conf": "",
         }
-        self._apply_and_verify_freebsd(self.distro.apply_network_config,
-                                       V1_NET_CFG,
-                                       expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify_freebsd(
+            self.distro.apply_network_config,
+            V1_NET_CFG,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_apply_network_config_freebsd_ifrename(self, ifaces_mac):
         ifaces_mac.return_value = {
-            '00:15:5d:4c:73:00': 'vtnet0',
+            "00:15:5d:4c:73:00": "vtnet0",
         }
         rc_conf_expected = """\
 ifconfig_vtnet0_name=eth0
@@ -327,49 +339,51 @@ ifconfig_eth1=DHCP
 """
 
         V1_NET_CFG_RENAME = copy.deepcopy(V1_NET_CFG)
-        V1_NET_CFG_RENAME['config'][0]['mac_address'] = '00:15:5d:4c:73:00'
+        V1_NET_CFG_RENAME["config"][0]["mac_address"] = "00:15:5d:4c:73:00"
 
         expected_cfgs = {
-            '/etc/rc.conf': rc_conf_expected,
-            '/etc/resolv.conf': ''
+            "/etc/rc.conf": rc_conf_expected,
+            "/etc/resolv.conf": "",
         }
-        self._apply_and_verify_freebsd(self.distro.apply_network_config,
-                                       V1_NET_CFG_RENAME,
-                                       expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify_freebsd(
+            self.distro.apply_network_config,
+            V1_NET_CFG_RENAME,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_apply_network_config_freebsd_nameserver(self, ifaces_mac):
         ifaces_mac.return_value = {
-            '00:15:5d:4c:73:00': 'eth0',
+            "00:15:5d:4c:73:00": "eth0",
         }
 
         V1_NET_CFG_DNS = copy.deepcopy(V1_NET_CFG)
-        ns = ['1.2.3.4']
-        V1_NET_CFG_DNS['config'][0]['subnets'][0]['dns_nameservers'] = ns
-        expected_cfgs = {
-            '/etc/resolv.conf': 'nameserver 1.2.3.4\n'
-        }
-        self._apply_and_verify_freebsd(self.distro.apply_network_config,
-                                       V1_NET_CFG_DNS,
-                                       expected_cfgs=expected_cfgs.copy())
+        ns = ["1.2.3.4"]
+        V1_NET_CFG_DNS["config"][0]["subnets"][0]["dns_nameservers"] = ns
+        expected_cfgs = {"/etc/resolv.conf": "nameserver 1.2.3.4\n"}
+        self._apply_and_verify_freebsd(
+            self.distro.apply_network_config,
+            V1_NET_CFG_DNS,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
 
 class TestNetCfgDistroUbuntuEni(TestNetCfgDistroBase):
-
     def setUp(self):
         super(TestNetCfgDistroUbuntuEni, self).setUp()
-        self.distro = self._get_distro('ubuntu', renderers=['eni'])
+        self.distro = self._get_distro("ubuntu", renderers=["eni"])
 
     def eni_path(self):
-        return '/etc/network/interfaces.d/50-cloud-init.cfg'
+        return "/etc/network/interfaces.d/50-cloud-init.cfg"
 
-    def _apply_and_verify_eni(self, apply_fn, config, expected_cfgs=None,
-                              bringup=False):
+    def _apply_and_verify_eni(
+        self, apply_fn, config, expected_cfgs=None, bringup=False
+    ):
         if not expected_cfgs:
-            raise ValueError('expected_cfg must not be None')
+            raise ValueError("expected_cfg must not be None")
 
         tmpd = None
-        with mock.patch('cloudinit.net.eni.available') as m_avail:
+        with mock.patch("cloudinit.net.eni.available") as m_avail:
             m_avail.return_value = True
             with self.reRooted(tmpd) as tmpd:
                 apply_fn(config, bringup)
@@ -389,35 +403,39 @@ class TestNetCfgDistroUbuntuEni(TestNetCfgDistroBase):
             self.eni_path(): V1_NET_CFG_OUTPUT,
         }
         # ub_distro.apply_network_config(V1_NET_CFG, False)
-        self._apply_and_verify_eni(self.distro.apply_network_config,
-                                   V1_NET_CFG,
-                                   expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify_eni(
+            self.distro.apply_network_config,
+            V1_NET_CFG,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
     def test_apply_network_config_ipv6_ub(self):
-        expected_cfgs = {
-            self.eni_path(): V1_NET_CFG_IPV6_OUTPUT
-        }
-        self._apply_and_verify_eni(self.distro.apply_network_config,
-                                   V1_NET_CFG_IPV6,
-                                   expected_cfgs=expected_cfgs.copy())
+        expected_cfgs = {self.eni_path(): V1_NET_CFG_IPV6_OUTPUT}
+        self._apply_and_verify_eni(
+            self.distro.apply_network_config,
+            V1_NET_CFG_IPV6,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
 
 class TestNetCfgDistroUbuntuNetplan(TestNetCfgDistroBase):
     def setUp(self):
         super(TestNetCfgDistroUbuntuNetplan, self).setUp()
-        self.distro = self._get_distro('ubuntu', renderers=['netplan'])
-        self.devlist = ['eth0', 'lo']
+        self.distro = self._get_distro("ubuntu", renderers=["netplan"])
+        self.devlist = ["eth0", "lo"]
 
-    def _apply_and_verify_netplan(self, apply_fn, config, expected_cfgs=None,
-                                  bringup=False):
+    def _apply_and_verify_netplan(
+        self, apply_fn, config, expected_cfgs=None, bringup=False
+    ):
         if not expected_cfgs:
-            raise ValueError('expected_cfg must not be None')
+            raise ValueError("expected_cfg must not be None")
 
         tmpd = None
-        with mock.patch('cloudinit.net.netplan.available',
-                        return_value=True):
-            with mock.patch("cloudinit.net.netplan.get_devicelist",
-                            return_value=self.devlist):
+        with mock.patch("cloudinit.net.netplan.available", return_value=True):
+            with mock.patch(
+                "cloudinit.net.netplan.get_devicelist",
+                return_value=self.devlist,
+            ):
                 with self.reRooted(tmpd) as tmpd:
                     apply_fn(config, bringup)
 
@@ -432,7 +450,7 @@ class TestNetCfgDistroUbuntuNetplan(TestNetCfgDistroBase):
             self.assertEqual(0o644, get_mode(cfgpath, tmpd))
 
     def netplan_path(self):
-        return '/etc/netplan/50-cloud-init.yaml'
+        return "/etc/netplan/50-cloud-init.yaml"
 
     def test_apply_network_config_v1_to_netplan_ub(self):
         expected_cfgs = {
@@ -440,9 +458,11 @@ class TestNetCfgDistroUbuntuNetplan(TestNetCfgDistroBase):
         }
 
         # ub_distro.apply_network_config(V1_NET_CFG, False)
-        self._apply_and_verify_netplan(self.distro.apply_network_config,
-                                       V1_NET_CFG,
-                                       expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify_netplan(
+            self.distro.apply_network_config,
+            V1_NET_CFG,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
     def test_apply_network_config_v1_ipv6_to_netplan_ub(self):
         expected_cfgs = {
@@ -450,39 +470,43 @@ class TestNetCfgDistroUbuntuNetplan(TestNetCfgDistroBase):
         }
 
         # ub_distro.apply_network_config(V1_NET_CFG_IPV6, False)
-        self._apply_and_verify_netplan(self.distro.apply_network_config,
-                                       V1_NET_CFG_IPV6,
-                                       expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify_netplan(
+            self.distro.apply_network_config,
+            V1_NET_CFG_IPV6,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
     def test_apply_network_config_v2_passthrough_ub(self):
         expected_cfgs = {
             self.netplan_path(): V2_TO_V2_NET_CFG_OUTPUT,
         }
         # ub_distro.apply_network_config(V2_NET_CFG, False)
-        self._apply_and_verify_netplan(self.distro.apply_network_config,
-                                       V2_NET_CFG,
-                                       expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify_netplan(
+            self.distro.apply_network_config,
+            V2_NET_CFG,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
 
 class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
-
     def setUp(self):
         super(TestNetCfgDistroRedhat, self).setUp()
-        self.distro = self._get_distro('rhel', renderers=['sysconfig'])
+        self.distro = self._get_distro("rhel", renderers=["sysconfig"])
 
     def ifcfg_path(self, ifname):
-        return '/etc/sysconfig/network-scripts/ifcfg-%s' % ifname
+        return "/etc/sysconfig/network-scripts/ifcfg-%s" % ifname
 
     def control_path(self):
-        return '/etc/sysconfig/network'
+        return "/etc/sysconfig/network"
 
-    def _apply_and_verify(self, apply_fn, config, expected_cfgs=None,
-                          bringup=False):
+    def _apply_and_verify(
+        self, apply_fn, config, expected_cfgs=None, bringup=False
+    ):
         if not expected_cfgs:
-            raise ValueError('expected_cfg must not be None')
+            raise ValueError("expected_cfg must not be None")
 
         tmpd = None
-        with mock.patch('cloudinit.net.sysconfig.available') as m_avail:
+        with mock.patch("cloudinit.net.sysconfig.available") as m_avail:
             m_avail.return_value = True
             with self.reRooted(tmpd) as tmpd:
                 apply_fn(config, bringup)
@@ -494,7 +518,8 @@ class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
 
     def test_apply_network_config_rh(self):
         expected_cfgs = {
-            self.ifcfg_path('eth0'): dedent("""\
+            self.ifcfg_path("eth0"): dedent(
+                """\
                 BOOTPROTO=none
                 DEFROUTE=yes
                 DEVICE=eth0
@@ -505,27 +530,35 @@ class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            self.ifcfg_path('eth1'): dedent("""\
+                """
+            ),
+            self.ifcfg_path("eth1"): dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEVICE=eth1
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            self.control_path(): dedent("""\
+                """
+            ),
+            self.control_path(): dedent(
+                """\
                 NETWORKING=yes
-                """),
+                """
+            ),
         }
         # rh_distro.apply_network_config(V1_NET_CFG, False)
-        self._apply_and_verify(self.distro.apply_network_config,
-                               V1_NET_CFG,
-                               expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify(
+            self.distro.apply_network_config,
+            V1_NET_CFG,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
     def test_apply_network_config_ipv6_rh(self):
         expected_cfgs = {
-            self.ifcfg_path('eth0'): dedent("""\
+            self.ifcfg_path("eth0"): dedent(
+                """\
                 BOOTPROTO=none
                 DEFROUTE=yes
                 DEVICE=eth0
@@ -538,39 +571,54 @@ class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            self.ifcfg_path('eth1'): dedent("""\
+                """
+            ),
+            self.ifcfg_path("eth1"): dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEVICE=eth1
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            self.control_path(): dedent("""\
+                """
+            ),
+            self.control_path(): dedent(
+                """\
                 NETWORKING=yes
                 NETWORKING_IPV6=yes
                 IPV6_AUTOCONF=no
-                """),
+                """
+            ),
         }
         # rh_distro.apply_network_config(V1_NET_CFG_IPV6, False)
-        self._apply_and_verify(self.distro.apply_network_config,
-                               V1_NET_CFG_IPV6,
-                               expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify(
+            self.distro.apply_network_config,
+            V1_NET_CFG_IPV6,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
     def test_vlan_render_unsupported(self):
         """Render officially unsupported vlan names."""
         cfg = {
-            'version': 2,
-            'ethernets': {
-                'eth0': {'addresses': ["192.10.1.2/24"],
-                         'match': {'macaddress': "00:16:3e:60:7c:df"}}},
-            'vlans': {
-                'infra0': {'addresses': ["10.0.1.2/16"],
-                           'id': 1001, 'link': 'eth0'}},
+            "version": 2,
+            "ethernets": {
+                "eth0": {
+                    "addresses": ["192.10.1.2/24"],
+                    "match": {"macaddress": "00:16:3e:60:7c:df"},
+                }
+            },
+            "vlans": {
+                "infra0": {
+                    "addresses": ["10.0.1.2/16"],
+                    "id": 1001,
+                    "link": "eth0",
+                }
+            },
         }
         expected_cfgs = {
-            self.ifcfg_path('eth0'): dedent("""\
+            self.ifcfg_path("eth0"): dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth0
                 HWADDR=00:16:3e:60:7c:df
@@ -580,8 +628,10 @@ class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            self.ifcfg_path('infra0'): dedent("""\
+                """
+            ),
+            self.ifcfg_path("infra0"): dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=infra0
                 IPADDR=10.0.1.2
@@ -591,26 +641,33 @@ class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
                 PHYSDEV=eth0
                 USERCTL=no
                 VLAN=yes
-                """),
-            self.control_path(): dedent("""\
+                """
+            ),
+            self.control_path(): dedent(
+                """\
                 NETWORKING=yes
-                """),
+                """
+            ),
         }
         self._apply_and_verify(
-            self.distro.apply_network_config, cfg,
-            expected_cfgs=expected_cfgs)
+            self.distro.apply_network_config, cfg, expected_cfgs=expected_cfgs
+        )
 
     def test_vlan_render(self):
         cfg = {
-            'version': 2,
-            'ethernets': {
-                'eth0': {'addresses': ["192.10.1.2/24"]}},
-            'vlans': {
-                'eth0.1001': {'addresses': ["10.0.1.2/16"],
-                              'id': 1001, 'link': 'eth0'}},
+            "version": 2,
+            "ethernets": {"eth0": {"addresses": ["192.10.1.2/24"]}},
+            "vlans": {
+                "eth0.1001": {
+                    "addresses": ["10.0.1.2/16"],
+                    "id": 1001,
+                    "link": "eth0",
+                }
+            },
         }
         expected_cfgs = {
-            self.ifcfg_path('eth0'): dedent("""\
+            self.ifcfg_path("eth0"): dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth0
                 IPADDR=192.10.1.2
@@ -619,8 +676,10 @@ class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            self.ifcfg_path('eth0.1001'): dedent("""\
+                """
+            ),
+            self.ifcfg_path("eth0.1001"): dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth0.1001
                 IPADDR=10.0.1.2
@@ -630,32 +689,35 @@ class TestNetCfgDistroRedhat(TestNetCfgDistroBase):
                 PHYSDEV=eth0
                 USERCTL=no
                 VLAN=yes
-                """),
-            self.control_path(): dedent("""\
+                """
+            ),
+            self.control_path(): dedent(
+                """\
                 NETWORKING=yes
-                """),
+                """
+            ),
         }
         self._apply_and_verify(
-            self.distro.apply_network_config, cfg,
-            expected_cfgs=expected_cfgs)
+            self.distro.apply_network_config, cfg, expected_cfgs=expected_cfgs
+        )
 
 
 class TestNetCfgDistroOpensuse(TestNetCfgDistroBase):
-
     def setUp(self):
         super(TestNetCfgDistroOpensuse, self).setUp()
-        self.distro = self._get_distro('opensuse', renderers=['sysconfig'])
+        self.distro = self._get_distro("opensuse", renderers=["sysconfig"])
 
     def ifcfg_path(self, ifname):
-        return '/etc/sysconfig/network/ifcfg-%s' % ifname
+        return "/etc/sysconfig/network/ifcfg-%s" % ifname
 
-    def _apply_and_verify(self, apply_fn, config, expected_cfgs=None,
-                          bringup=False):
+    def _apply_and_verify(
+        self, apply_fn, config, expected_cfgs=None, bringup=False
+    ):
         if not expected_cfgs:
-            raise ValueError('expected_cfg must not be None')
+            raise ValueError("expected_cfg must not be None")
 
         tmpd = None
-        with mock.patch('cloudinit.net.sysconfig.available') as m_avail:
+        with mock.patch("cloudinit.net.sysconfig.available") as m_avail:
             m_avail.return_value = True
             with self.reRooted(tmpd) as tmpd:
                 apply_fn(config, bringup)
@@ -668,52 +730,71 @@ class TestNetCfgDistroOpensuse(TestNetCfgDistroBase):
     def test_apply_network_config_opensuse(self):
         """Opensuse uses apply_network_config and renders sysconfig"""
         expected_cfgs = {
-            self.ifcfg_path('eth0'): dedent("""\
+            self.ifcfg_path("eth0"): dedent(
+                """\
                 BOOTPROTO=static
                 IPADDR=192.168.1.5
                 NETMASK=255.255.255.0
                 STARTMODE=auto
-                """),
-            self.ifcfg_path('eth1'): dedent("""\
+                """
+            ),
+            self.ifcfg_path("eth1"): dedent(
+                """\
                 BOOTPROTO=dhcp4
                 STARTMODE=auto
-                """),
+                """
+            ),
         }
-        self._apply_and_verify(self.distro.apply_network_config,
-                               V1_NET_CFG,
-                               expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify(
+            self.distro.apply_network_config,
+            V1_NET_CFG,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
     def test_apply_network_config_ipv6_opensuse(self):
         """Opensuse uses apply_network_config and renders sysconfig w/ipv6"""
         expected_cfgs = {
-            self.ifcfg_path('eth0'): dedent("""\
+            self.ifcfg_path("eth0"): dedent(
+                """\
                 BOOTPROTO=static
                 IPADDR6=2607:f0d0:1002:0011::2/64
                 STARTMODE=auto
-            """),
-            self.ifcfg_path('eth1'): dedent("""\
+            """
+            ),
+            self.ifcfg_path("eth1"): dedent(
+                """\
                 BOOTPROTO=dhcp4
                 STARTMODE=auto
-            """),
+            """
+            ),
         }
-        self._apply_and_verify(self.distro.apply_network_config,
-                               V1_NET_CFG_IPV6,
-                               expected_cfgs=expected_cfgs.copy())
+        self._apply_and_verify(
+            self.distro.apply_network_config,
+            V1_NET_CFG_IPV6,
+            expected_cfgs=expected_cfgs.copy(),
+        )
 
 
 class TestNetCfgDistroArch(TestNetCfgDistroBase):
     def setUp(self):
         super(TestNetCfgDistroArch, self).setUp()
-        self.distro = self._get_distro('arch', renderers=['netplan'])
-
-    def _apply_and_verify(self, apply_fn, config, expected_cfgs=None,
-                          bringup=False, with_netplan=False):
+        self.distro = self._get_distro("arch", renderers=["netplan"])
+
+    def _apply_and_verify(
+        self,
+        apply_fn,
+        config,
+        expected_cfgs=None,
+        bringup=False,
+        with_netplan=False,
+    ):
         if not expected_cfgs:
-            raise ValueError('expected_cfg must not be None')
+            raise ValueError("expected_cfg must not be None")
 
         tmpd = None
-        with mock.patch('cloudinit.net.netplan.available',
-                        return_value=with_netplan):
+        with mock.patch(
+            "cloudinit.net.netplan.available", return_value=with_netplan
+        ):
             with self.reRooted(tmpd) as tmpd:
                 apply_fn(config, bringup)
 
@@ -728,10 +809,10 @@ class TestNetCfgDistroArch(TestNetCfgDistroBase):
             self.assertEqual(0o644, get_mode(cfgpath, tmpd))
 
     def netctl_path(self, iface):
-        return '/etc/netctl/%s' % iface
+        return "/etc/netctl/%s" % iface
 
     def netplan_path(self):
-        return '/etc/netplan/50-cloud-init.yaml'
+        return "/etc/netplan/50-cloud-init.yaml"
 
     def test_apply_network_config_v1_without_netplan(self):
         # Note that this is in fact an invalid netctl config:
@@ -741,33 +822,40 @@ class TestNetCfgDistroArch(TestNetCfgDistroBase):
         # still being used in absence of netplan, not the correctness of the
         # rendered netctl config.
         expected_cfgs = {
-            self.netctl_path('eth0'): dedent("""\
+            self.netctl_path("eth0"): dedent(
+                """\
                 Address=192.168.1.5/255.255.255.0
                 Connection=ethernet
                 DNS=()
                 Gateway=192.168.1.254
                 IP=static
                 Interface=eth0
-                """),
-            self.netctl_path('eth1'): dedent("""\
+                """
+            ),
+            self.netctl_path("eth1"): dedent(
+                """\
                 Address=None/None
                 Connection=ethernet
                 DNS=()
                 Gateway=
                 IP=dhcp
                 Interface=eth1
-                """),
+                """
+            ),
         }
 
         # ub_distro.apply_network_config(V1_NET_CFG, False)
-        self._apply_and_verify(self.distro.apply_network_config,
-                               V1_NET_CFG,
-                               expected_cfgs=expected_cfgs.copy(),
-                               with_netplan=False)
+        self._apply_and_verify(
+            self.distro.apply_network_config,
+            V1_NET_CFG,
+            expected_cfgs=expected_cfgs.copy(),
+            with_netplan=False,
+        )
 
     def test_apply_network_config_v1_with_netplan(self):
         expected_cfgs = {
-            self.netplan_path(): dedent("""\
+            self.netplan_path(): dedent(
+                """\
                 # generated by cloud-init
                 network:
                     version: 2
@@ -778,31 +866,32 @@ class TestNetCfgDistroArch(TestNetCfgDistroBase):
                             gateway4: 192.168.1.254
                         eth1:
                             dhcp4: true
-                """),
+                """
+            ),
         }
 
         with mock.patch(
-            'cloudinit.net.netplan.get_devicelist',
-            return_value=[]
+            "cloudinit.net.netplan.get_devicelist", return_value=[]
         ):
-            self._apply_and_verify(self.distro.apply_network_config,
-                                   V1_NET_CFG,
-                                   expected_cfgs=expected_cfgs.copy(),
-                                   with_netplan=True)
+            self._apply_and_verify(
+                self.distro.apply_network_config,
+                V1_NET_CFG,
+                expected_cfgs=expected_cfgs.copy(),
+                with_netplan=True,
+            )
 
 
 class TestNetCfgDistroPhoton(TestNetCfgDistroBase):
-
     def setUp(self):
         super(TestNetCfgDistroPhoton, self).setUp()
-        self.distro = self._get_distro('photon', renderers=['networkd'])
+        self.distro = self._get_distro("photon", renderers=["networkd"])
 
     def create_conf_dict(self, contents):
         content_dict = {}
         for line in contents:
             if line:
                 line = line.strip()
-                if line and re.search(r'^\[(.+)\]$', line):
+                if line and re.search(r"^\[(.+)\]$", line):
                     content_dict[line] = []
                     key = line
                 elif line:
@@ -815,13 +904,14 @@ class TestNetCfgDistroPhoton(TestNetCfgDistroBase):
         for k, v in actual.items():
             self.assertEqual(sorted(expected[k]), sorted(v))
 
-    def _apply_and_verify(self, apply_fn, config, expected_cfgs=None,
-                          bringup=False):
+    def _apply_and_verify(
+        self, apply_fn, config, expected_cfgs=None, bringup=False
+    ):
         if not expected_cfgs:
-            raise ValueError('expected_cfg must not be None')
+            raise ValueError("expected_cfg must not be None")
 
         tmpd = None
-        with mock.patch('cloudinit.net.networkd.available') as m_avail:
+        with mock.patch("cloudinit.net.networkd.available") as m_avail:
             m_avail.return_value = True
             with self.reRooted(tmpd) as tmpd:
                 apply_fn(config, bringup)
@@ -833,10 +923,11 @@ class TestNetCfgDistroPhoton(TestNetCfgDistroBase):
             self.assertEqual(0o644, get_mode(cfgpath, tmpd))
 
     def nwk_file_path(self, ifname):
-        return '/etc/systemd/network/10-cloud-init-%s.network' % ifname
+        return "/etc/systemd/network/10-cloud-init-%s.network" % ifname
 
     def net_cfg_1(self, ifname):
-        ret = """\
+        ret = (
+            """\
         [Match]
         Name=%s
         [Network]
@@ -844,48 +935,53 @@ class TestNetCfgDistroPhoton(TestNetCfgDistroBase):
         [Address]
         Address=192.168.1.5/24
         [Route]
-        Gateway=192.168.1.254""" % ifname
+        Gateway=192.168.1.254"""
+            % ifname
+        )
         return ret
 
     def net_cfg_2(self, ifname):
-        ret = """\
+        ret = (
+            """\
         [Match]
         Name=%s
         [Network]
-        DHCP=ipv4""" % ifname
+        DHCP=ipv4"""
+            % ifname
+        )
         return ret
 
     def test_photon_network_config_v1(self):
-        tmp = self.net_cfg_1('eth0').splitlines()
+        tmp = self.net_cfg_1("eth0").splitlines()
         expected_eth0 = self.create_conf_dict(tmp)
 
-        tmp = self.net_cfg_2('eth1').splitlines()
+        tmp = self.net_cfg_2("eth1").splitlines()
         expected_eth1 = self.create_conf_dict(tmp)
 
         expected_cfgs = {
-            self.nwk_file_path('eth0'): expected_eth0,
-            self.nwk_file_path('eth1'): expected_eth1,
+            self.nwk_file_path("eth0"): expected_eth0,
+            self.nwk_file_path("eth1"): expected_eth1,
         }
 
-        self._apply_and_verify(self.distro.apply_network_config,
-                               V1_NET_CFG,
-                               expected_cfgs.copy())
+        self._apply_and_verify(
+            self.distro.apply_network_config, V1_NET_CFG, expected_cfgs.copy()
+        )
 
     def test_photon_network_config_v2(self):
-        tmp = self.net_cfg_1('eth7').splitlines()
+        tmp = self.net_cfg_1("eth7").splitlines()
         expected_eth7 = self.create_conf_dict(tmp)
 
-        tmp = self.net_cfg_2('eth9').splitlines()
+        tmp = self.net_cfg_2("eth9").splitlines()
         expected_eth9 = self.create_conf_dict(tmp)
 
         expected_cfgs = {
-            self.nwk_file_path('eth7'): expected_eth7,
-            self.nwk_file_path('eth9'): expected_eth9,
+            self.nwk_file_path("eth7"): expected_eth7,
+            self.nwk_file_path("eth9"): expected_eth9,
         }
 
-        self._apply_and_verify(self.distro.apply_network_config,
-                               V2_NET_CFG,
-                               expected_cfgs.copy())
+        self._apply_and_verify(
+            self.distro.apply_network_config, V2_NET_CFG, expected_cfgs.copy()
+        )
 
     def test_photon_network_config_v1_with_duplicates(self):
         expected = """\
@@ -902,15 +998,16 @@ class TestNetCfgDistroPhoton(TestNetCfgDistroBase):
 
         expected = self.create_conf_dict(expected.splitlines())
         expected_cfgs = {
-            self.nwk_file_path('eth0'): expected,
+            self.nwk_file_path("eth0"): expected,
         }
 
-        self._apply_and_verify(self.distro.apply_network_config,
-                               net_cfg,
-                               expected_cfgs.copy())
+        self._apply_and_verify(
+            self.distro.apply_network_config, net_cfg, expected_cfgs.copy()
+        )
 
 
 def get_mode(path, target=None):
     return os.stat(subp.target_path(target, path)).st_mode & 0o777
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/distros/test_networking.py b/tests/unittests/distros/test_networking.py
index ec508f4d..635f6901 100644
--- a/tests/unittests/distros/test_networking.py
+++ b/tests/unittests/distros/test_networking.py
@@ -1,3 +1,6 @@
+# See https://docs.pytest.org/en/stable/example
+# /parametrize.html#parametrizing-conditional-raising
+from contextlib import ExitStack as does_not_raise
 from unittest import mock
 
 import pytest
@@ -9,10 +12,6 @@ from cloudinit.distros.networking import (
     Networking,
 )
 
-# See https://docs.pytest.org/en/stable/example
-# /parametrize.html#parametrizing-conditional-raising
-from contextlib import ExitStack as does_not_raise
-
 
 @pytest.yield_fixture
 def generic_networking_cls():
@@ -35,7 +34,8 @@ def generic_networking_cls():
 
     error = AssertionError("Unexpectedly used /sys in generic networking code")
     with mock.patch(
-        "cloudinit.net.get_sys_class_path", side_effect=error,
+        "cloudinit.net.get_sys_class_path",
+        side_effect=error,
     ):
         yield TestNetworking
 
@@ -91,8 +91,10 @@ class TestLinuxNetworkingTrySetLinkUp:
         m_is_up.return_value = True
         is_success = LinuxNetworking().try_set_link_up(devname)
 
-        assert (mock.call(['ip', 'link', 'set', devname, 'up']) ==
-                m_subp.call_args_list[-1])
+        assert (
+            mock.call(["ip", "link", "set", devname, "up"])
+            == m_subp.call_args_list[-1]
+        )
         assert is_success
 
     def test_calls_subp_return_false(self, m_subp, m_is_up):
@@ -100,8 +102,10 @@ class TestLinuxNetworkingTrySetLinkUp:
         m_is_up.return_value = False
         is_success = LinuxNetworking().try_set_link_up(devname)
 
-        assert (mock.call(['ip', 'link', 'set', devname, 'up']) ==
-                m_subp.call_args_list[-1])
+        assert (
+            mock.call(["ip", "link", "set", devname, "up"])
+            == m_subp.call_args_list[-1]
+        )
         assert not is_success
 
 
@@ -153,7 +157,9 @@ class TestNetworkingWaitForPhysDevs:
         return netcfg
 
     def test_skips_settle_if_all_present(
-        self, generic_networking_cls, wait_for_physdevs_netcfg,
+        self,
+        generic_networking_cls,
+        wait_for_physdevs_netcfg,
     ):
         networking = generic_networking_cls()
         with mock.patch.object(
@@ -169,7 +175,9 @@ class TestNetworkingWaitForPhysDevs:
             assert 0 == m_settle.call_count
 
     def test_calls_udev_settle_on_missing(
-        self, generic_networking_cls, wait_for_physdevs_netcfg,
+        self,
+        generic_networking_cls,
+        wait_for_physdevs_netcfg,
     ):
         networking = generic_networking_cls()
         with mock.patch.object(
diff --git a/tests/unittests/distros/test_opensuse.py b/tests/unittests/distros/test_opensuse.py
index 4ff26102..4a4b266f 100644
--- a/tests/unittests/distros/test_opensuse.py
+++ b/tests/unittests/distros/test_opensuse.py
@@ -6,7 +6,6 @@ from . import _get_distro
 
 
 class TestopenSUSE(CiTestCase):
-
     def test_get_distro(self):
         distro = _get_distro("opensuse")
-        self.assertEqual(distro.osfamily, 'suse')
+        self.assertEqual(distro.osfamily, "suse")
diff --git a/tests/unittests/distros/test_photon.py b/tests/unittests/distros/test_photon.py
index 3858f723..fed30c2b 100644
--- a/tests/unittests/distros/test_photon.py
+++ b/tests/unittests/distros/test_photon.py
@@ -1,34 +1,34 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from . import _get_distro
 from cloudinit import util
-from tests.unittests.helpers import mock
-from tests.unittests.helpers import CiTestCase
+from tests.unittests.helpers import CiTestCase, mock
+
+from . import _get_distro
 
 SYSTEM_INFO = {
-    'paths': {
-        'cloud_dir': '/var/lib/cloud/',
-        'templates_dir': '/etc/cloud/templates/',
+    "paths": {
+        "cloud_dir": "/var/lib/cloud/",
+        "templates_dir": "/etc/cloud/templates/",
     },
-    'network': {'renderers': 'networkd'},
+    "network": {"renderers": "networkd"},
 }
 
 
 class TestPhoton(CiTestCase):
     with_logs = True
-    distro = _get_distro('photon', SYSTEM_INFO)
-    expected_log_line = 'Rely on PhotonOS default network config'
+    distro = _get_distro("photon", SYSTEM_INFO)
+    expected_log_line = "Rely on PhotonOS default network config"
 
     def test_network_renderer(self):
-        self.assertEqual(self.distro._cfg['network']['renderers'], 'networkd')
+        self.assertEqual(self.distro._cfg["network"]["renderers"], "networkd")
 
     def test_get_distro(self):
-        self.assertEqual(self.distro.osfamily, 'photon')
+        self.assertEqual(self.distro.osfamily, "photon")
 
     @mock.patch("cloudinit.distros.photon.subp.subp")
     def test_write_hostname(self, m_subp):
-        hostname = 'myhostname'
-        hostfile = self.tmp_path('previous-hostname')
+        hostname = "myhostname"
+        hostfile = self.tmp_path("previous-hostname")
         self.distro._write_hostname(hostname, hostfile)
         self.assertEqual(hostname, util.load_file(hostfile))
 
@@ -36,7 +36,7 @@ class TestPhoton(CiTestCase):
         self.assertEqual(ret, hostname)
 
         m_subp.return_value = (None, None)
-        hostfile += 'hostfile'
+        hostfile += "hostfile"
         self.distro._write_hostname(hostname, hostfile)
 
         m_subp.return_value = (hostname, None)
@@ -44,25 +44,25 @@ class TestPhoton(CiTestCase):
         self.assertEqual(ret, hostname)
 
         self.logs.truncate(0)
-        m_subp.return_value = (None, 'bla')
+        m_subp.return_value = (None, "bla")
         self.distro._write_hostname(hostname, None)
-        self.assertIn('Error while setting hostname', self.logs.getvalue())
+        self.assertIn("Error while setting hostname", self.logs.getvalue())
 
-    @mock.patch('cloudinit.net.generate_fallback_config')
+    @mock.patch("cloudinit.net.generate_fallback_config")
     def test_fallback_netcfg(self, m_fallback_cfg):
 
-        key = 'disable_fallback_netcfg'
+        key = "disable_fallback_netcfg"
         # Don't use fallback if no setting given
         self.logs.truncate(0)
-        assert(self.distro.generate_fallback_config() is None)
+        assert self.distro.generate_fallback_config() is None
         self.assertIn(self.expected_log_line, self.logs.getvalue())
 
         self.logs.truncate(0)
         self.distro._cfg[key] = True
-        assert(self.distro.generate_fallback_config() is None)
+        assert self.distro.generate_fallback_config() is None
         self.assertIn(self.expected_log_line, self.logs.getvalue())
 
         self.logs.truncate(0)
         self.distro._cfg[key] = False
-        assert(self.distro.generate_fallback_config() is not None)
+        assert self.distro.generate_fallback_config() is not None
         self.assertNotIn(self.expected_log_line, self.logs.getvalue())
diff --git a/tests/unittests/distros/test_resolv.py b/tests/unittests/distros/test_resolv.py
index e7971627..65e78101 100644
--- a/tests/unittests/distros/test_resolv.py
+++ b/tests/unittests/distros/test_resolv.py
@@ -1,18 +1,16 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.distros.parsers import resolv_conf
-
-from tests.unittests.helpers import TestCase
-
 import re
 
+from cloudinit.distros.parsers import resolv_conf
+from tests.unittests.helpers import TestCase
 
-BASE_RESOLVE = '''
+BASE_RESOLVE = """
 ; generated by /sbin/dhclient-script
 search blah.yahoo.com yahoo.com
 nameserver 10.15.44.14
 nameserver 10.15.30.92
-'''
+"""
 BASE_RESOLVE = BASE_RESOLVE.strip()
 
 
@@ -27,39 +25,40 @@ class TestResolvHelper(TestCase):
         self.assertIsNone(rp.local_domain)
 
         rp.local_domain = "bob"
-        self.assertEqual('bob', rp.local_domain)
-        self.assertIn('domain bob', str(rp))
+        self.assertEqual("bob", rp.local_domain)
+        self.assertIn("domain bob", str(rp))
 
     def test_nameservers(self):
         rp = resolv_conf.ResolvConf(BASE_RESOLVE)
-        self.assertIn('10.15.44.14', rp.nameservers)
-        self.assertIn('10.15.30.92', rp.nameservers)
-        rp.add_nameserver('10.2')
-        self.assertIn('10.2', rp.nameservers)
-        self.assertIn('nameserver 10.2', str(rp))
-        self.assertNotIn('10.3', rp.nameservers)
+        self.assertIn("10.15.44.14", rp.nameservers)
+        self.assertIn("10.15.30.92", rp.nameservers)
+        rp.add_nameserver("10.2")
+        self.assertIn("10.2", rp.nameservers)
+        self.assertIn("nameserver 10.2", str(rp))
+        self.assertNotIn("10.3", rp.nameservers)
         self.assertEqual(len(rp.nameservers), 3)
-        rp.add_nameserver('10.2')
-        rp.add_nameserver('10.3')
-        self.assertNotIn('10.3', rp.nameservers)
+        rp.add_nameserver("10.2")
+        rp.add_nameserver("10.3")
+        self.assertNotIn("10.3", rp.nameservers)
 
     def test_search_domains(self):
         rp = resolv_conf.ResolvConf(BASE_RESOLVE)
-        self.assertIn('yahoo.com', rp.search_domains)
-        self.assertIn('blah.yahoo.com', rp.search_domains)
-        rp.add_search_domain('bbb.y.com')
-        self.assertIn('bbb.y.com', rp.search_domains)
-        self.assertTrue(re.search(r'search(.*)bbb.y.com(.*)', str(rp)))
-        self.assertIn('bbb.y.com', rp.search_domains)
-        rp.add_search_domain('bbb.y.com')
+        self.assertIn("yahoo.com", rp.search_domains)
+        self.assertIn("blah.yahoo.com", rp.search_domains)
+        rp.add_search_domain("bbb.y.com")
+        self.assertIn("bbb.y.com", rp.search_domains)
+        self.assertTrue(re.search(r"search(.*)bbb.y.com(.*)", str(rp)))
+        self.assertIn("bbb.y.com", rp.search_domains)
+        rp.add_search_domain("bbb.y.com")
         self.assertEqual(len(rp.search_domains), 3)
-        rp.add_search_domain('bbb2.y.com')
+        rp.add_search_domain("bbb2.y.com")
         self.assertEqual(len(rp.search_domains), 4)
-        rp.add_search_domain('bbb3.y.com')
+        rp.add_search_domain("bbb3.y.com")
         self.assertEqual(len(rp.search_domains), 5)
-        rp.add_search_domain('bbb4.y.com')
+        rp.add_search_domain("bbb4.y.com")
         self.assertEqual(len(rp.search_domains), 6)
-        self.assertRaises(ValueError, rp.add_search_domain, 'bbb5.y.com')
+        self.assertRaises(ValueError, rp.add_search_domain, "bbb5.y.com")
         self.assertEqual(len(rp.search_domains), 6)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/distros/test_sles.py b/tests/unittests/distros/test_sles.py
index 04514a19..66b8b13d 100644
--- a/tests/unittests/distros/test_sles.py
+++ b/tests/unittests/distros/test_sles.py
@@ -6,7 +6,6 @@ from . import _get_distro
 
 
 class TestSLES(CiTestCase):
-
     def test_get_distro(self):
         distro = _get_distro("sles")
-        self.assertEqual(distro.osfamily, 'suse')
+        self.assertEqual(distro.osfamily, "suse")
diff --git a/tests/unittests/distros/test_sysconfig.py b/tests/unittests/distros/test_sysconfig.py
index 4368496d..d0979e17 100644
--- a/tests/unittests/distros/test_sysconfig.py
+++ b/tests/unittests/distros/test_sysconfig.py
@@ -3,22 +3,23 @@
 import re
 
 from cloudinit.distros.parsers.sys_conf import SysConf
-
 from tests.unittests.helpers import TestCase
 
-
 # Lots of good examples @
 # http://content.hccfl.edu/pollock/AUnix1/SysconfigFilesDesc.txt
 
+
 class TestSysConfHelper(TestCase):
     # This function was added in 2.7, make it work for 2.6
     def assertRegMatches(self, text, regexp):
         regexp = re.compile(regexp)
-        self.assertTrue(regexp.search(text),
-                        msg="%s must match %s!" % (text, regexp.pattern))
+        self.assertTrue(
+            regexp.search(text),
+            msg="%s must match %s!" % (text, regexp.pattern),
+        )
 
     def test_parse_no_change(self):
-        contents = '''# A comment
+        contents = """# A comment
 USESMBAUTH=no
 KEYTABLE=/usr/lib/kbd/keytables/us.map
 SHORTDATE=$(date +%y:%m:%d:%H:%M)
@@ -28,59 +29,64 @@ NETMASK0=255.255.255.0
 LIST=$LOGROOT/incremental-list
 IPV6TO4_ROUTING='eth0-:0004::1/64 eth1-:0005::1/64'
 ETHTOOL_OPTS="-K ${DEVICE} tso on; -G ${DEVICE} rx 256 tx 256"
-USEMD5=no'''
+USEMD5=no"""
         conf = SysConf(contents.splitlines())
-        self.assertEqual(conf['HOSTNAME'], 'blahblah')
-        self.assertEqual(conf['SHORTDATE'], '$(date +%y:%m:%d:%H:%M)')
+        self.assertEqual(conf["HOSTNAME"], "blahblah")
+        self.assertEqual(conf["SHORTDATE"], "$(date +%y:%m:%d:%H:%M)")
         # Should be unquoted
-        self.assertEqual(conf['ETHTOOL_OPTS'], ('-K ${DEVICE} tso on; '
-                                                '-G ${DEVICE} rx 256 tx 256'))
+        self.assertEqual(
+            conf["ETHTOOL_OPTS"],
+            "-K ${DEVICE} tso on; -G ${DEVICE} rx 256 tx 256",
+        )
         self.assertEqual(contents, str(conf))
 
     def test_parse_shell_vars(self):
-        contents = 'USESMBAUTH=$XYZ'
+        contents = "USESMBAUTH=$XYZ"
         conf = SysConf(contents.splitlines())
         self.assertEqual(contents, str(conf))
-        conf = SysConf('')
-        conf['B'] = '${ZZ}d apples'
+        conf = SysConf("")
+        conf["B"] = "${ZZ}d apples"
         # Should be quoted
         self.assertEqual('B="${ZZ}d apples"', str(conf))
-        conf = SysConf('')
-        conf['B'] = '$? d apples'
+        conf = SysConf("")
+        conf["B"] = "$? d apples"
         self.assertEqual('B="$? d apples"', str(conf))
         contents = 'IPMI_WATCHDOG_OPTIONS="timeout=60"'
         conf = SysConf(contents.splitlines())
-        self.assertEqual('IPMI_WATCHDOG_OPTIONS=timeout=60', str(conf))
+        self.assertEqual("IPMI_WATCHDOG_OPTIONS=timeout=60", str(conf))
 
     def test_parse_adjust(self):
         contents = 'IPV6TO4_ROUTING="eth0-:0004::1/64 eth1-:0005::1/64"'
         conf = SysConf(contents.splitlines())
         # Should be unquoted
-        self.assertEqual('eth0-:0004::1/64 eth1-:0005::1/64',
-                         conf['IPV6TO4_ROUTING'])
-        conf['IPV6TO4_ROUTING'] = "blah \tblah"
+        self.assertEqual(
+            "eth0-:0004::1/64 eth1-:0005::1/64", conf["IPV6TO4_ROUTING"]
+        )
+        conf["IPV6TO4_ROUTING"] = "blah \tblah"
         contents2 = str(conf).strip()
         # Should be requoted due to whitespace
-        self.assertRegMatches(contents2,
-                              r'IPV6TO4_ROUTING=[\']blah\s+blah[\']')
+        self.assertRegMatches(
+            contents2, r"IPV6TO4_ROUTING=[\']blah\s+blah[\']"
+        )
 
     def test_parse_no_adjust_shell(self):
-        conf = SysConf(''.splitlines())
-        conf['B'] = ' $(time)'
+        conf = SysConf("".splitlines())
+        conf["B"] = " $(time)"
         contents = str(conf)
-        self.assertEqual('B= $(time)', contents)
+        self.assertEqual("B= $(time)", contents)
 
     def test_parse_empty(self):
-        contents = ''
+        contents = ""
         conf = SysConf(contents.splitlines())
-        self.assertEqual('', str(conf).strip())
+        self.assertEqual("", str(conf).strip())
 
     def test_parse_add_new(self):
-        contents = 'BLAH=b'
+        contents = "BLAH=b"
         conf = SysConf(contents.splitlines())
-        conf['Z'] = 'd'
+        conf["Z"] = "d"
         contents = str(conf)
         self.assertIn("Z=d", contents)
         self.assertIn("BLAH=b", contents)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/distros/test_user_data_normalize.py b/tests/unittests/distros/test_user_data_normalize.py
index bd8f2adb..67ea024b 100644
--- a/tests/unittests/distros/test_user_data_normalize.py
+++ b/tests/unittests/distros/test_user_data_normalize.py
@@ -2,251 +2,233 @@
 
 from unittest import mock
 
-from cloudinit import distros
+from cloudinit import distros, helpers, settings
 from cloudinit.distros import ug_util
-from cloudinit import helpers
-from cloudinit import settings
-
 from tests.unittests.helpers import TestCase
 
-
 bcfg = {
-    'name': 'bob',
-    'plain_text_passwd': 'ubuntu',
-    'home': "/home/ubuntu",
-    'shell': "/bin/bash",
-    'lock_passwd': True,
-    'gecos': "Ubuntu",
-    'groups': ["foo"]
+    "name": "bob",
+    "plain_text_passwd": "ubuntu",
+    "home": "/home/ubuntu",
+    "shell": "/bin/bash",
+    "lock_passwd": True,
+    "gecos": "Ubuntu",
+    "groups": ["foo"],
 }
 
 
 class TestUGNormalize(TestCase):
-
     def setUp(self):
         super(TestUGNormalize, self).setUp()
-        self.add_patch('cloudinit.util.system_is_snappy', 'm_snappy')
+        self.add_patch("cloudinit.util.system_is_snappy", "m_snappy")
 
     def _make_distro(self, dtype, def_user=None):
         cfg = dict(settings.CFG_BUILTIN)
-        cfg['system_info']['distro'] = dtype
-        paths = helpers.Paths(cfg['system_info']['paths'])
+        cfg["system_info"]["distro"] = dtype
+        paths = helpers.Paths(cfg["system_info"]["paths"])
         distro_cls = distros.fetch(dtype)
         if def_user:
-            cfg['system_info']['default_user'] = def_user.copy()
-        distro = distro_cls(dtype, cfg['system_info'], paths)
+            cfg["system_info"]["default_user"] = def_user.copy()
+        distro = distro_cls(dtype, cfg["system_info"], paths)
         return distro
 
     def _norm(self, cfg, distro):
         return ug_util.normalize_users_groups(cfg, distro)
 
     def test_group_dict(self):
-        distro = self._make_distro('ubuntu')
-        g = {'groups':
-             [{'ubuntu': ['foo', 'bar'],
-               'bob': 'users'},
-              'cloud-users',
-              {'bob': 'users2'}]}
+        distro = self._make_distro("ubuntu")
+        g = {
+            "groups": [
+                {"ubuntu": ["foo", "bar"], "bob": "users"},
+                "cloud-users",
+                {"bob": "users2"},
+            ]
+        }
         (_users, groups) = self._norm(g, distro)
-        self.assertIn('ubuntu', groups)
-        ub_members = groups['ubuntu']
-        self.assertEqual(sorted(['foo', 'bar']), sorted(ub_members))
-        self.assertIn('bob', groups)
-        b_members = groups['bob']
-        self.assertEqual(sorted(['users', 'users2']),
-                         sorted(b_members))
+        self.assertIn("ubuntu", groups)
+        ub_members = groups["ubuntu"]
+        self.assertEqual(sorted(["foo", "bar"]), sorted(ub_members))
+        self.assertIn("bob", groups)
+        b_members = groups["bob"]
+        self.assertEqual(sorted(["users", "users2"]), sorted(b_members))
 
     def test_basic_groups(self):
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'groups': ['bob'],
+            "groups": ["bob"],
         }
         (users, groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', groups)
+        self.assertIn("bob", groups)
         self.assertEqual({}, users)
 
     def test_csv_groups(self):
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'groups': 'bob,joe,steve',
+            "groups": "bob,joe,steve",
         }
         (users, groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', groups)
-        self.assertIn('joe', groups)
-        self.assertIn('steve', groups)
+        self.assertIn("bob", groups)
+        self.assertIn("joe", groups)
+        self.assertIn("steve", groups)
         self.assertEqual({}, users)
 
     def test_more_groups(self):
-        distro = self._make_distro('ubuntu')
-        ug_cfg = {
-            'groups': ['bob', 'joe', 'steve']
-        }
+        distro = self._make_distro("ubuntu")
+        ug_cfg = {"groups": ["bob", "joe", "steve"]}
         (users, groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', groups)
-        self.assertIn('joe', groups)
-        self.assertIn('steve', groups)
+        self.assertIn("bob", groups)
+        self.assertIn("joe", groups)
+        self.assertIn("steve", groups)
         self.assertEqual({}, users)
 
     def test_member_groups(self):
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'groups': {
-                'bob': ['s'],
-                'joe': [],
-                'steve': [],
+            "groups": {
+                "bob": ["s"],
+                "joe": [],
+                "steve": [],
             }
         }
         (users, groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', groups)
-        self.assertEqual(['s'], groups['bob'])
-        self.assertEqual([], groups['joe'])
-        self.assertIn('joe', groups)
-        self.assertIn('steve', groups)
+        self.assertIn("bob", groups)
+        self.assertEqual(["s"], groups["bob"])
+        self.assertEqual([], groups["joe"])
+        self.assertIn("joe", groups)
+        self.assertIn("steve", groups)
         self.assertEqual({}, users)
 
     def test_users_simple_dict(self):
-        distro = self._make_distro('ubuntu', bcfg)
+        distro = self._make_distro("ubuntu", bcfg)
         ug_cfg = {
-            'users': {
-                'default': True,
+            "users": {
+                "default": True,
             }
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
+        self.assertIn("bob", users)
         ug_cfg = {
-            'users': {
-                'default': 'yes',
+            "users": {
+                "default": "yes",
             }
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
+        self.assertIn("bob", users)
         ug_cfg = {
-            'users': {
-                'default': '1',
+            "users": {
+                "default": "1",
             }
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
+        self.assertIn("bob", users)
 
     def test_users_simple_dict_no(self):
-        distro = self._make_distro('ubuntu', bcfg)
+        distro = self._make_distro("ubuntu", bcfg)
         ug_cfg = {
-            'users': {
-                'default': False,
+            "users": {
+                "default": False,
             }
         }
         (users, _groups) = self._norm(ug_cfg, distro)
         self.assertEqual({}, users)
         ug_cfg = {
-            'users': {
-                'default': 'no',
+            "users": {
+                "default": "no",
             }
         }
         (users, _groups) = self._norm(ug_cfg, distro)
         self.assertEqual({}, users)
 
     def test_users_simple_csv(self):
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'users': 'joe,bob',
+            "users": "joe,bob",
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('joe', users)
-        self.assertIn('bob', users)
-        self.assertEqual({'default': False}, users['joe'])
-        self.assertEqual({'default': False}, users['bob'])
+        self.assertIn("joe", users)
+        self.assertIn("bob", users)
+        self.assertEqual({"default": False}, users["joe"])
+        self.assertEqual({"default": False}, users["bob"])
 
     def test_users_simple(self):
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'users': [
-                'joe',
-                'bob'
-            ],
+            "users": ["joe", "bob"],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('joe', users)
-        self.assertIn('bob', users)
-        self.assertEqual({'default': False}, users['joe'])
-        self.assertEqual({'default': False}, users['bob'])
+        self.assertIn("joe", users)
+        self.assertIn("bob", users)
+        self.assertEqual({"default": False}, users["joe"])
+        self.assertEqual({"default": False}, users["bob"])
 
     def test_users_old_user(self):
-        distro = self._make_distro('ubuntu', bcfg)
-        ug_cfg = {
-            'user': 'zetta',
-            'users': 'default'
-        }
+        distro = self._make_distro("ubuntu", bcfg)
+        ug_cfg = {"user": "zetta", "users": "default"}
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertNotIn('bob', users)  # Bob is not the default now, zetta is
-        self.assertIn('zetta', users)
-        self.assertTrue(users['zetta']['default'])
-        self.assertNotIn('default', users)
-        ug_cfg = {
-            'user': 'zetta',
-            'users': 'default, joe'
-        }
+        self.assertNotIn("bob", users)  # Bob is not the default now, zetta is
+        self.assertIn("zetta", users)
+        self.assertTrue(users["zetta"]["default"])
+        self.assertNotIn("default", users)
+        ug_cfg = {"user": "zetta", "users": "default, joe"}
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertNotIn('bob', users)  # Bob is not the default now, zetta is
-        self.assertIn('joe', users)
-        self.assertIn('zetta', users)
-        self.assertTrue(users['zetta']['default'])
-        self.assertNotIn('default', users)
-        ug_cfg = {
-            'user': 'zetta',
-            'users': ['bob', 'joe']
-        }
+        self.assertNotIn("bob", users)  # Bob is not the default now, zetta is
+        self.assertIn("joe", users)
+        self.assertIn("zetta", users)
+        self.assertTrue(users["zetta"]["default"])
+        self.assertNotIn("default", users)
+        ug_cfg = {"user": "zetta", "users": ["bob", "joe"]}
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
-        self.assertIn('joe', users)
-        self.assertIn('zetta', users)
-        self.assertTrue(users['zetta']['default'])
+        self.assertIn("bob", users)
+        self.assertIn("joe", users)
+        self.assertIn("zetta", users)
+        self.assertTrue(users["zetta"]["default"])
         ug_cfg = {
-            'user': 'zetta',
-            'users': {
-                'bob': True,
-                'joe': True,
-            }
+            "user": "zetta",
+            "users": {
+                "bob": True,
+                "joe": True,
+            },
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
-        self.assertIn('joe', users)
-        self.assertIn('zetta', users)
-        self.assertTrue(users['zetta']['default'])
+        self.assertIn("bob", users)
+        self.assertIn("joe", users)
+        self.assertIn("zetta", users)
+        self.assertTrue(users["zetta"]["default"])
         ug_cfg = {
-            'user': 'zetta',
+            "user": "zetta",
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('zetta', users)
+        self.assertIn("zetta", users)
         ug_cfg = {}
         (users, groups) = self._norm(ug_cfg, distro)
         self.assertEqual({}, users)
         self.assertEqual({}, groups)
 
     def test_users_dict_default_additional(self):
-        distro = self._make_distro('ubuntu', bcfg)
+        distro = self._make_distro("ubuntu", bcfg)
         ug_cfg = {
-            'users': [
-                {'name': 'default', 'blah': True}
-            ],
+            "users": [{"name": "default", "blah": True}],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
-        self.assertEqual(",".join(distro.get_default_user()['groups']),
-                         users['bob']['groups'])
-        self.assertEqual(True, users['bob']['blah'])
-        self.assertEqual(True, users['bob']['default'])
+        self.assertIn("bob", users)
+        self.assertEqual(
+            ",".join(distro.get_default_user()["groups"]),
+            users["bob"]["groups"],
+        )
+        self.assertEqual(True, users["bob"]["blah"])
+        self.assertEqual(True, users["bob"]["default"])
 
     def test_users_dict_extract(self):
-        distro = self._make_distro('ubuntu', bcfg)
+        distro = self._make_distro("ubuntu", bcfg)
         ug_cfg = {
-            'users': [
-                'default',
+            "users": [
+                "default",
             ],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
+        self.assertIn("bob", users)
         (name, config) = ug_util.extract_default(users)
-        self.assertEqual(name, 'bob')
+        self.assertEqual(name, "bob")
         expected_config = {}
         def_config = None
         try:
@@ -258,115 +240,126 @@ class TestUGNormalize(TestCase):
         expected_config.update(def_config)
 
         # Ignore these for now
-        expected_config.pop('name', None)
-        expected_config.pop('groups', None)
-        config.pop('groups', None)
+        expected_config.pop("name", None)
+        expected_config.pop("groups", None)
+        config.pop("groups", None)
         self.assertEqual(config, expected_config)
 
     def test_users_dict_default(self):
-        distro = self._make_distro('ubuntu', bcfg)
+        distro = self._make_distro("ubuntu", bcfg)
         ug_cfg = {
-            'users': [
-                'default',
+            "users": [
+                "default",
             ],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('bob', users)
-        self.assertEqual(",".join(distro.get_default_user()['groups']),
-                         users['bob']['groups'])
-        self.assertEqual(True, users['bob']['default'])
+        self.assertIn("bob", users)
+        self.assertEqual(
+            ",".join(distro.get_default_user()["groups"]),
+            users["bob"]["groups"],
+        )
+        self.assertEqual(True, users["bob"]["default"])
 
     def test_users_dict_trans(self):
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'users': [
-                {'name': 'joe',
-                 'tr-me': True},
-                {'name': 'bob'},
+            "users": [
+                {"name": "joe", "tr-me": True},
+                {"name": "bob"},
             ],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('joe', users)
-        self.assertIn('bob', users)
-        self.assertEqual({'tr_me': True, 'default': False}, users['joe'])
-        self.assertEqual({'default': False}, users['bob'])
+        self.assertIn("joe", users)
+        self.assertIn("bob", users)
+        self.assertEqual({"tr_me": True, "default": False}, users["joe"])
+        self.assertEqual({"default": False}, users["bob"])
 
     def test_users_dict(self):
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'users': [
-                {'name': 'joe'},
-                {'name': 'bob'},
+            "users": [
+                {"name": "joe"},
+                {"name": "bob"},
             ],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
-        self.assertIn('joe', users)
-        self.assertIn('bob', users)
-        self.assertEqual({'default': False}, users['joe'])
-        self.assertEqual({'default': False}, users['bob'])
+        self.assertIn("joe", users)
+        self.assertIn("bob", users)
+        self.assertEqual({"default": False}, users["joe"])
+        self.assertEqual({"default": False}, users["bob"])
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_create_snap_user(self, mock_subp):
-        mock_subp.side_effect = [('{"username": "joe", "ssh-key-count": 1}\n',
-                                  '')]
-        distro = self._make_distro('ubuntu')
+        mock_subp.side_effect = [
+            ('{"username": "joe", "ssh-key-count": 1}\n', "")
+        ]
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'users': [
-                {'name': 'joe', 'snapuser': 'joe@joe.com'},
+            "users": [
+                {"name": "joe", "snapuser": "joe@joe.com"},
             ],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
         for (user, config) in users.items():
-            print('user=%s config=%s' % (user, config))
+            print("user=%s config=%s" % (user, config))
             username = distro.create_user(user, **config)
 
-        snapcmd = ['snap', 'create-user', '--sudoer', '--json', 'joe@joe.com']
+        snapcmd = ["snap", "create-user", "--sudoer", "--json", "joe@joe.com"]
         mock_subp.assert_called_with(snapcmd, capture=True, logstring=snapcmd)
-        self.assertEqual(username, 'joe')
+        self.assertEqual(username, "joe")
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_create_snap_user_known(self, mock_subp):
-        mock_subp.side_effect = [('{"username": "joe", "ssh-key-count": 1}\n',
-                                  '')]
-        distro = self._make_distro('ubuntu')
+        mock_subp.side_effect = [
+            ('{"username": "joe", "ssh-key-count": 1}\n', "")
+        ]
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'users': [
-                {'name': 'joe', 'snapuser': 'joe@joe.com', 'known': True},
+            "users": [
+                {"name": "joe", "snapuser": "joe@joe.com", "known": True},
             ],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
         for (user, config) in users.items():
-            print('user=%s config=%s' % (user, config))
+            print("user=%s config=%s" % (user, config))
             username = distro.create_user(user, **config)
 
-        snapcmd = ['snap', 'create-user', '--sudoer', '--json', '--known',
-                   'joe@joe.com']
+        snapcmd = [
+            "snap",
+            "create-user",
+            "--sudoer",
+            "--json",
+            "--known",
+            "joe@joe.com",
+        ]
         mock_subp.assert_called_with(snapcmd, capture=True, logstring=snapcmd)
-        self.assertEqual(username, 'joe')
-
-    @mock.patch('cloudinit.util.system_is_snappy')
-    @mock.patch('cloudinit.util.is_group')
-    @mock.patch('cloudinit.subp.subp')
-    def test_add_user_on_snappy_system(self, mock_subp, mock_isgrp,
-                                       mock_snappy):
+        self.assertEqual(username, "joe")
+
+    @mock.patch("cloudinit.util.system_is_snappy")
+    @mock.patch("cloudinit.util.is_group")
+    @mock.patch("cloudinit.subp.subp")
+    def test_add_user_on_snappy_system(
+        self, mock_subp, mock_isgrp, mock_snappy
+    ):
         mock_isgrp.return_value = False
         mock_subp.return_value = True
         mock_snappy.return_value = True
-        distro = self._make_distro('ubuntu')
+        distro = self._make_distro("ubuntu")
         ug_cfg = {
-            'users': [
-                {'name': 'joe', 'groups': 'users', 'create_groups': True},
+            "users": [
+                {"name": "joe", "groups": "users", "create_groups": True},
             ],
         }
         (users, _groups) = self._norm(ug_cfg, distro)
         for (user, config) in users.items():
-            print('user=%s config=%s' % (user, config))
+            print("user=%s config=%s" % (user, config))
             distro.add_user(user, **config)
 
-        groupcmd = ['groupadd', 'users', '--extrausers']
-        addcmd = ['useradd', 'joe', '--extrausers', '--groups', 'users', '-m']
+        groupcmd = ["groupadd", "users", "--extrausers"]
+        addcmd = ["useradd", "joe", "--extrausers", "--groups", "users", "-m"]
 
         mock_subp.assert_any_call(groupcmd)
         mock_subp.assert_any_call(addcmd, logstring=addcmd)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/filters/test_launch_index.py b/tests/unittests/filters/test_launch_index.py
index 0b1a7067..679bdfc3 100644
--- a/tests/unittests/filters/test_launch_index.py
+++ b/tests/unittests/filters/test_launch_index.py
@@ -3,11 +3,10 @@
 import copy
 from itertools import filterfalse
 
-from tests.unittests import helpers
-
-from cloudinit.filters import launch_index
 from cloudinit import user_data as ud
 from cloudinit import util
+from cloudinit.filters import launch_index
+from tests.unittests import helpers
 
 
 def count_messages(root):
@@ -20,7 +19,6 @@ def count_messages(root):
 
 
 class TestLaunchFilter(helpers.ResourceUsingTestCase):
-
     def assertCounts(self, message, expected_counts):
         orig_message = copy.deepcopy(message)
         for (index, count) in expected_counts.items():
@@ -54,7 +52,7 @@ class TestLaunchFilter(helpers.ResourceUsingTestCase):
         return True
 
     def testMultiEmailIndex(self):
-        test_data = helpers.readResource('filter_cloud_multipart_2.email')
+        test_data = helpers.readResource("filter_cloud_multipart_2.email")
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(test_data)
         self.assertTrue(count_messages(message) > 0)
@@ -69,7 +67,7 @@ class TestLaunchFilter(helpers.ResourceUsingTestCase):
         self.assertCounts(message, expected_counts)
 
     def testHeaderEmailIndex(self):
-        test_data = helpers.readResource('filter_cloud_multipart_header.email')
+        test_data = helpers.readResource("filter_cloud_multipart_header.email")
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(test_data)
         self.assertTrue(count_messages(message) > 0)
@@ -78,13 +76,13 @@ class TestLaunchFilter(helpers.ResourceUsingTestCase):
         expected_counts = {
             5: 1,
             -1: 0,
-            'c': 1,
+            "c": 1,
             None: 1,
         }
         self.assertCounts(message, expected_counts)
 
     def testConfigEmailIndex(self):
-        test_data = helpers.readResource('filter_cloud_multipart_1.email')
+        test_data = helpers.readResource("filter_cloud_multipart_1.email")
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(test_data)
         self.assertTrue(count_messages(message) > 0)
@@ -98,7 +96,7 @@ class TestLaunchFilter(helpers.ResourceUsingTestCase):
         self.assertCounts(message, expected_counts)
 
     def testNoneIndex(self):
-        test_data = helpers.readResource('filter_cloud_multipart.yaml')
+        test_data = helpers.readResource("filter_cloud_multipart.yaml")
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(test_data)
         start_count = count_messages(message)
@@ -107,7 +105,7 @@ class TestLaunchFilter(helpers.ResourceUsingTestCase):
         self.assertTrue(self.equivalentMessage(message, filtered_message))
 
     def testIndexes(self):
-        test_data = helpers.readResource('filter_cloud_multipart.yaml')
+        test_data = helpers.readResource("filter_cloud_multipart.yaml")
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(test_data)
         start_count = count_messages(message)
@@ -126,10 +124,11 @@ class TestLaunchFilter(helpers.ResourceUsingTestCase):
             # None should just give all back
             None: start_count,
             # Non ints should be ignored
-            'c': start_count,
+            "c": start_count,
             # Strings should be converted
-            '1': 2,
+            "1": 2,
         }
         self.assertCounts(message, expected_counts)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/helpers.py b/tests/unittests/helpers.py
index e9afbd36..67fed8c9 100644
--- a/tests/unittests/helpers.py
+++ b/tests/unittests/helpers.py
@@ -1,7 +1,6 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import functools
-import httpretty
 import io
 import logging
 import os
@@ -12,21 +11,23 @@ import sys
 import tempfile
 import time
 import unittest
-from pathlib import Path
 from contextlib import ExitStack, contextmanager
+from pathlib import Path
 from unittest import mock
 from unittest.util import strclass
 
+import httpretty
+
 import cloudinit
-from cloudinit.config.schema import (
-    SchemaValidationError, validate_cloudconfig_schema)
-from cloudinit import cloud
-from cloudinit import distros
+from cloudinit import cloud, distros
 from cloudinit import helpers as ch
+from cloudinit import subp, util
+from cloudinit.config.schema import (
+    SchemaValidationError,
+    validate_cloudconfig_schema,
+)
 from cloudinit.sources import DataSourceNone
 from cloudinit.templater import JINJA_AVAILABLE
-from cloudinit import subp
-from cloudinit import util
 
 _real_subp = subp.subp
 
@@ -66,11 +67,11 @@ def retarget_many_wrapper(new_base, am, old_func):
             if isinstance(path, str):
                 n_args[i] = rebase_path(path, new_base)
         return old_func(*n_args, **kwds)
+
     return wrapper
 
 
 class TestCase(unittest.TestCase):
-
     def reset_global_state(self):
         """Reset any global state to its original settings.
 
@@ -93,13 +94,13 @@ class TestCase(unittest.TestCase):
         self.reset_global_state()
 
     def shortDescription(self):
-        return strclass(self.__class__) + '.' + self._testMethodName
+        return strclass(self.__class__) + "." + self._testMethodName
 
     def add_patch(self, target, attr, *args, **kwargs):
         """Patches specified target object and sets it as attr on test
         instance also schedules cleanup"""
-        if 'autospec' not in kwargs:
-            kwargs['autospec'] = True
+        if "autospec" not in kwargs:
+            kwargs["autospec"] = True
         m = mock.patch(target, *args, **kwargs)
         p = m.start()
         self.addCleanup(m.stop)
@@ -108,7 +109,7 @@ class TestCase(unittest.TestCase):
 
 class CiTestCase(TestCase):
     """This is the preferred test case base class unless user
-       needs other test case classes below."""
+    needs other test case classes below."""
 
     # Subclass overrides for specific test behavior
     # Whether or not a unit test needs logfile setup
@@ -131,7 +132,7 @@ class CiTestCase(TestCase):
             # Create a log handler so unit tests can search expected logs.
             self.logger = logging.getLogger()
             self.logs = io.StringIO()
-            formatter = logging.Formatter('%(levelname)s: %(message)s')
+            formatter = logging.Formatter("%(levelname)s: %(message)s")
             handler = logging.StreamHandler(self.logs)
             handler.setFormatter(formatter)
             self.old_handlers = self.logger.handlers
@@ -142,12 +143,13 @@ class CiTestCase(TestCase):
             subp.subp = self._fake_subp
 
     def _fake_subp(self, *args, **kwargs):
-        if 'args' in kwargs:
-            cmd = kwargs['args']
+        if "args" in kwargs:
+            cmd = kwargs["args"]
         else:
             if not args:
                 raise TypeError(
-                    "subp() missing 1 required positional argument: 'args'")
+                    "subp() missing 1 required positional argument: 'args'"
+                )
             cmd = args[0]
 
         if not isinstance(cmd, str):
@@ -158,16 +160,19 @@ class CiTestCase(TestCase):
         if isinstance(self.allowed_subp, bool):
             pass_through = self.allowed_subp
         else:
-            pass_through = (
-                (cmd in self.allowed_subp) or
-                (self.SUBP_SHELL_TRUE in self.allowed_subp and
-                 kwargs.get('shell')))
+            pass_through = (cmd in self.allowed_subp) or (
+                self.SUBP_SHELL_TRUE in self.allowed_subp
+                and kwargs.get("shell")
+            )
         if pass_through:
             return _real_subp(*args, **kwargs)
         raise Exception(
-            "called subp. set self.allowed_subp=True to allow\n subp(%s)" %
-            ', '.join([str(repr(a)) for a in args] +
-                      ["%s=%s" % (k, repr(v)) for k, v in kwargs.items()]))
+            "called subp. set self.allowed_subp=True to allow\n subp(%s)"
+            % ", ".join(
+                [str(repr(a)) for a in args]
+                + ["%s=%s" % (k, repr(v)) for k, v in kwargs.items()]
+            )
+        )
 
     def tearDown(self):
         if self.with_logs:
@@ -180,12 +185,12 @@ class CiTestCase(TestCase):
     def tmp_dir(self, dir=None, cleanup=True):
         # return a full path to a temporary directory that will be cleaned up.
         if dir is None:
-            tmpd = tempfile.mkdtemp(
-                prefix="ci-%s." % self.__class__.__name__)
+            tmpd = tempfile.mkdtemp(prefix="ci-%s." % self.__class__.__name__)
         else:
             tmpd = tempfile.mkdtemp(dir=dir)
         self.addCleanup(
-            functools.partial(shutil.rmtree, tmpd, ignore_errors=True))
+            functools.partial(shutil.rmtree, tmpd, ignore_errors=True)
+        )
         return tmpd
 
     def tmp_path(self, path, dir=None):
@@ -208,7 +213,7 @@ class CiTestCase(TestCase):
         if not sys_cfg:
             sys_cfg = {}
         tmp_paths = {}
-        for var in ['templates_dir', 'run_dir', 'cloud_dir']:
+        for var in ["templates_dir", "run_dir", "cloud_dir"]:
             tmp_paths[var] = self.tmp_path(var, dir=self.new_root)
             util.ensure_dir(tmp_paths[var])
         self.paths = ch.Paths(tmp_paths)
@@ -221,13 +226,13 @@ class CiTestCase(TestCase):
 
     @classmethod
     def random_string(cls, length=8):
-        """ return a random lowercase string with default length of 8"""
-        return ''.join(
-            random.choice(string.ascii_lowercase) for _ in range(length))
+        """return a random lowercase string with default length of 8"""
+        return "".join(
+            random.choice(string.ascii_lowercase) for _ in range(length)
+        )
 
 
 class ResourceUsingTestCase(CiTestCase):
-
     def setUp(self):
         super(ResourceUsingTestCase, self).setUp()
         self.resource_path = None
@@ -235,14 +240,13 @@ class ResourceUsingTestCase(CiTestCase):
     def getCloudPaths(self, ds=None):
         tmpdir = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, tmpdir)
-        cp = ch.Paths({'cloud_dir': tmpdir,
-                       'templates_dir': resourceLocation()},
-                      ds=ds)
+        cp = ch.Paths(
+            {"cloud_dir": tmpdir, "templates_dir": resourceLocation()}, ds=ds
+        )
         return cp
 
 
 class FilesystemMockingTestCase(ResourceUsingTestCase):
-
     def setUp(self):
         super(FilesystemMockingTestCase, self).setUp()
         self.patched_funcs = ExitStack()
@@ -253,10 +257,10 @@ class FilesystemMockingTestCase(ResourceUsingTestCase):
 
     def replicateTestRoot(self, example_root, target_root):
         real_root = resourceLocation()
-        real_root = os.path.join(real_root, 'roots', example_root)
+        real_root = os.path.join(real_root, "roots", example_root)
         for (dir_path, _dirnames, filenames) in os.walk(real_root):
             real_path = dir_path
-            make_path = rebase_path(real_path[len(real_root):], target_root)
+            make_path = rebase_path(real_path[len(real_root) :], target_root)
             util.ensure_dir(make_path)
             for f in filenames:
                 real_path = util.abs_join(real_path, f)
@@ -265,72 +269,89 @@ class FilesystemMockingTestCase(ResourceUsingTestCase):
 
     def patchUtils(self, new_root):
         patch_funcs = {
-            util: [('write_file', 1),
-                   ('append_file', 1),
-                   ('load_file', 1),
-                   ('ensure_dir', 1),
-                   ('chmod', 1),
-                   ('delete_dir_contents', 1),
-                   ('del_file', 1),
-                   ('sym_link', -1),
-                   ('copy', -1)],
+            util: [
+                ("write_file", 1),
+                ("append_file", 1),
+                ("load_file", 1),
+                ("ensure_dir", 1),
+                ("chmod", 1),
+                ("delete_dir_contents", 1),
+                ("del_file", 1),
+                ("sym_link", -1),
+                ("copy", -1),
+            ],
         }
         for (mod, funcs) in patch_funcs.items():
             for (f, am) in funcs:
                 func = getattr(mod, f)
                 trap_func = retarget_many_wrapper(new_root, am, func)
                 self.patched_funcs.enter_context(
-                    mock.patch.object(mod, f, trap_func))
+                    mock.patch.object(mod, f, trap_func)
+                )
 
         # Handle subprocess calls
-        func = getattr(subp, 'subp')
+        func = getattr(subp, "subp")
 
         def nsubp(*_args, **_kwargs):
-            return ('', '')
+            return ("", "")
 
         self.patched_funcs.enter_context(
-            mock.patch.object(subp, 'subp', nsubp))
+            mock.patch.object(subp, "subp", nsubp)
+        )
 
         def null_func(*_args, **_kwargs):
             return None
 
-        for f in ['chownbyid', 'chownbyname']:
+        for f in ["chownbyid", "chownbyname"]:
             self.patched_funcs.enter_context(
-                mock.patch.object(util, f, null_func))
+                mock.patch.object(util, f, null_func)
+            )
 
     def patchOS(self, new_root):
         patch_funcs = {
-            os.path: [('isfile', 1), ('exists', 1),
-                      ('islink', 1), ('isdir', 1), ('lexists', 1)],
-            os: [('listdir', 1), ('mkdir', 1),
-                 ('lstat', 1), ('symlink', 2),
-                 ('stat', 1)]
+            os.path: [
+                ("isfile", 1),
+                ("exists", 1),
+                ("islink", 1),
+                ("isdir", 1),
+                ("lexists", 1),
+            ],
+            os: [
+                ("listdir", 1),
+                ("mkdir", 1),
+                ("lstat", 1),
+                ("symlink", 2),
+                ("stat", 1),
+            ],
         }
 
-        if hasattr(os, 'scandir'):
+        if hasattr(os, "scandir"):
             # py27 does not have scandir
-            patch_funcs[os].append(('scandir', 1))
+            patch_funcs[os].append(("scandir", 1))
 
         for (mod, funcs) in patch_funcs.items():
             for f, nargs in funcs:
                 func = getattr(mod, f)
                 trap_func = retarget_many_wrapper(new_root, nargs, func)
                 self.patched_funcs.enter_context(
-                    mock.patch.object(mod, f, trap_func))
+                    mock.patch.object(mod, f, trap_func)
+                )
 
     def patchOpen(self, new_root):
         trap_func = retarget_many_wrapper(new_root, 1, open)
         self.patched_funcs.enter_context(
-            mock.patch('builtins.open', trap_func)
+            mock.patch("builtins.open", trap_func)
         )
 
     def patchStdoutAndStderr(self, stdout=None, stderr=None):
         if stdout is not None:
             self.patched_funcs.enter_context(
-                mock.patch.object(sys, 'stdout', stdout))
+                mock.patch.object(sys, "stdout", stdout)
+            )
         if stderr is not None:
             self.patched_funcs.enter_context(
-                mock.patch.object(sys, 'stderr', stderr))
+                mock.patch.object(sys, "stderr", stderr)
+            )
 
     def reRoot(self, root=None):
         if root is None:
@@ -355,33 +376,32 @@ class HttprettyTestCase(CiTestCase):
     # And make sure reset and enable/disable are done.
 
     def setUp(self):
-        self.restore_proxy = os.environ.get('http_proxy')
+        self.restore_proxy = os.environ.get("http_proxy")
         if self.restore_proxy is not None:
-            del os.environ['http_proxy']
+            del os.environ["http_proxy"]
         super(HttprettyTestCase, self).setUp()
         httpretty.HTTPretty.allow_net_connect = False
         httpretty.reset()
         httpretty.enable()
         # Stop the logging from HttpPretty so our logs don't get mixed
         # up with its logs
-        logging.getLogger('httpretty.core').setLevel(logging.CRITICAL)
+        logging.getLogger("httpretty.core").setLevel(logging.CRITICAL)
 
     def tearDown(self):
         httpretty.disable()
         httpretty.reset()
         if self.restore_proxy:
-            os.environ['http_proxy'] = self.restore_proxy
+            os.environ["http_proxy"] = self.restore_proxy
         super(HttprettyTestCase, self).tearDown()
 
 
 class SchemaTestCaseMixin(unittest.TestCase):
-
     def assertSchemaValid(self, cfg, msg="Valid Schema failed validation."):
         """Assert the config is valid per self.schema.
 
         If there is only one top level key in the schema properties, then
         the cfg will be put under that key."""
-        props = list(self.schema.get('properties'))
+        props = list(self.schema.get("properties"))
         # put cfg under top level key if there is only one in the schema
         if len(props) == 1:
             cfg = {props[0]: cfg}
@@ -402,7 +422,7 @@ def populate_dir(path, files):
             if isinstance(content, bytes):
                 fp.write(content)
             else:
-                fp.write(content.encode('utf-8'))
+                fp.write(content.encode("utf-8"))
             fp.close()
         ret.append(p)
 
@@ -425,7 +445,7 @@ def dir2dict(startdir, prefix=None):
     for root, _dirs, files in os.walk(startdir):
         for fname in files:
             fpath = os.path.join(root, fname)
-            key = fpath[len(prefix):]
+            key = fpath[len(prefix) :]
             flist[key] = util.load_file(fpath)
     return flist
 
@@ -443,16 +463,16 @@ def wrap_and_call(prefix, mocks, func, *args, **kwargs):
 
     return_value: return from 'func'
     """
-    delim = '.'
+    delim = "."
     if prefix is None:
-        prefix = ''
+        prefix = ""
     prefix = prefix.rstrip(delim)
     unwraps = []
     for fname, kw in mocks.items():
         if prefix:
             fname = delim.join((prefix, fname))
         if not isinstance(kw, dict):
-            kw = {'return_value': kw}
+            kw = {"return_value": kw}
         p = mock.patch(fname, **kw)
         p.start()
         unwraps.append(p)
@@ -464,19 +484,20 @@ def wrap_and_call(prefix, mocks, func, *args, **kwargs):
 
 
 def resourceLocation(subname=None):
-    path = cloud_init_project_dir('tests/data')
+    path = cloud_init_project_dir("tests/data")
     if not subname:
         return path
     return os.path.join(path, subname)
 
 
-def readResource(name, mode='r'):
+def readResource(name, mode="r"):
     with open(resourceLocation(name), mode) as fh:
         return fh.read()
 
 
 try:
     import jsonschema
+
     assert jsonschema  # avoid pyflakes error F401: import unused
     _missing_jsonschema_dep = False
 except ImportError:
@@ -485,7 +506,8 @@ except ImportError:
 
 def skipUnlessJsonSchema():
     return skipIf(
-        _missing_jsonschema_dep, "No python-jsonschema dependency present.")
+        _missing_jsonschema_dep, "No python-jsonschema dependency present."
+    )
 
 
 def skipUnlessJinja():
@@ -497,13 +519,17 @@ def skipIfJinja():
 
 
 # older versions of mock do not have the useful 'assert_not_called'
-if not hasattr(mock.Mock, 'assert_not_called'):
+if not hasattr(mock.Mock, "assert_not_called"):
+
     def __mock_assert_not_called(mmock):
         if mmock.call_count != 0:
-            msg = ("[citest] Expected '%s' to not have been called. "
-                   "Called %s times." %
-                   (mmock._mock_name or 'mock', mmock.call_count))
+            msg = (
+                "[citest] Expected '%s' to not have been called. "
+                "Called %s times."
+                % (mmock._mock_name or "mock", mmock.call_count)
+            )
             raise AssertionError(msg)
+
     mock.Mock.assert_not_called = __mock_assert_not_called
 
 
@@ -524,4 +550,5 @@ def cloud_init_project_dir(sub_path: str) -> str:
     """
     return str(get_top_level_dir() / sub_path)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/net/test_dhcp.py b/tests/unittests/net/test_dhcp.py
index d3da3981..876873d5 100644
--- a/tests/unittests/net/test_dhcp.py
+++ b/tests/unittests/net/test_dhcp.py
@@ -1,44 +1,54 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-import httpretty
 import os
 import signal
 from textwrap import dedent
 
+import httpretty
+
 import cloudinit.net as net
 from cloudinit.net.dhcp import (
-    InvalidDHCPLeaseFileError, maybe_perform_dhcp_discovery,
-    parse_dhcp_lease_file, dhcp_discovery, networkd_load_leases,
-    parse_static_routes)
+    InvalidDHCPLeaseFileError,
+    dhcp_discovery,
+    maybe_perform_dhcp_discovery,
+    networkd_load_leases,
+    parse_dhcp_lease_file,
+    parse_static_routes,
+)
 from cloudinit.util import ensure_file, write_file
 from tests.unittests.helpers import (
-    CiTestCase, HttprettyTestCase, mock, populate_dir, wrap_and_call)
+    CiTestCase,
+    HttprettyTestCase,
+    mock,
+    populate_dir,
+    wrap_and_call,
+)
 
 
 class TestParseDHCPLeasesFile(CiTestCase):
-
     def test_parse_empty_lease_file_errors(self):
         """parse_dhcp_lease_file errors when file content is empty."""
-        empty_file = self.tmp_path('leases')
+        empty_file = self.tmp_path("leases")
         ensure_file(empty_file)
         with self.assertRaises(InvalidDHCPLeaseFileError) as context_manager:
             parse_dhcp_lease_file(empty_file)
         error = context_manager.exception
-        self.assertIn('Cannot parse empty dhcp lease file', str(error))
+        self.assertIn("Cannot parse empty dhcp lease file", str(error))
 
     def test_parse_malformed_lease_file_content_errors(self):
         """parse_dhcp_lease_file errors when file content isn't dhcp leases."""
-        non_lease_file = self.tmp_path('leases')
-        write_file(non_lease_file, 'hi mom.')
+        non_lease_file = self.tmp_path("leases")
+        write_file(non_lease_file, "hi mom.")
         with self.assertRaises(InvalidDHCPLeaseFileError) as context_manager:
             parse_dhcp_lease_file(non_lease_file)
         error = context_manager.exception
-        self.assertIn('Cannot parse dhcp lease file', str(error))
+        self.assertIn("Cannot parse dhcp lease file", str(error))
 
     def test_parse_multiple_leases(self):
         """parse_dhcp_lease_file returns a list of all leases within."""
-        lease_file = self.tmp_path('leases')
-        content = dedent("""
+        lease_file = self.tmp_path("leases")
+        content = dedent(
+            """
             lease {
               interface "wlp3s0";
               fixed-address 192.168.2.74;
@@ -55,26 +65,36 @@ class TestParseDHCPLeasesFile(CiTestCase):
               option subnet-mask 255.255.255.0;
               option routers 192.168.2.1;
             }
-        """)
+        """
+        )
         expected = [
-            {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74',
-             'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1',
-             'renew': '4 2017/07/27 18:02:30',
-             'expire': '5 2017/07/28 07:08:15',
-             'filename': 'http://192.168.2.50/boot.php?mac=${netX}'},
-            {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74',
-             'filename': 'http://192.168.2.50/boot.php?mac=${netX}',
-             'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1'}]
+            {
+                "interface": "wlp3s0",
+                "fixed-address": "192.168.2.74",
+                "subnet-mask": "255.255.255.0",
+                "routers": "192.168.2.1",
+                "renew": "4 2017/07/27 18:02:30",
+                "expire": "5 2017/07/28 07:08:15",
+                "filename": "http://192.168.2.50/boot.php?mac=${netX}",
+            },
+            {
+                "interface": "wlp3s0",
+                "fixed-address": "192.168.2.74",
+                "filename": "http://192.168.2.50/boot.php?mac=${netX}",
+                "subnet-mask": "255.255.255.0",
+                "routers": "192.168.2.1",
+            },
+        ]
         write_file(lease_file, content)
         self.assertCountEqual(expected, parse_dhcp_lease_file(lease_file))
 
 
 class TestDHCPRFC3442(CiTestCase):
-
     def test_parse_lease_finds_rfc3442_classless_static_routes(self):
         """parse_dhcp_lease_file returns rfc3442-classless-static-routes."""
-        lease_file = self.tmp_path('leases')
-        content = dedent("""
+        lease_file = self.tmp_path("leases")
+        content = dedent(
+            """
             lease {
               interface "wlp3s0";
               fixed-address 192.168.2.74;
@@ -84,13 +104,19 @@ class TestDHCPRFC3442(CiTestCase):
               renew 4 2017/07/27 18:02:30;
               expire 5 2017/07/28 07:08:15;
             }
-        """)
+        """
+        )
         expected = [
-            {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74',
-             'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1',
-             'rfc3442-classless-static-routes': '0,130,56,240,1',
-             'renew': '4 2017/07/27 18:02:30',
-             'expire': '5 2017/07/28 07:08:15'}]
+            {
+                "interface": "wlp3s0",
+                "fixed-address": "192.168.2.74",
+                "subnet-mask": "255.255.255.0",
+                "routers": "192.168.2.1",
+                "rfc3442-classless-static-routes": "0,130,56,240,1",
+                "renew": "4 2017/07/27 18:02:30",
+                "expire": "5 2017/07/28 07:08:15",
+            }
+        ]
         write_file(lease_file, content)
         self.assertCountEqual(expected, parse_dhcp_lease_file(lease_file))
 
@@ -99,8 +125,9 @@ class TestDHCPRFC3442(CiTestCase):
         parse_dhcp_lease_file returns classless-static-routes
         for Centos lease format.
         """
-        lease_file = self.tmp_path('leases')
-        content = dedent("""
+        lease_file = self.tmp_path("leases")
+        content = dedent(
+            """
             lease {
               interface "wlp3s0";
               fixed-address 192.168.2.74;
@@ -110,61 +137,79 @@ class TestDHCPRFC3442(CiTestCase):
               renew 4 2017/07/27 18:02:30;
               expire 5 2017/07/28 07:08:15;
             }
-        """)
+        """
+        )
         expected = [
-            {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74',
-             'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1',
-             'classless-static-routes': '0 130.56.240.1',
-             'renew': '4 2017/07/27 18:02:30',
-             'expire': '5 2017/07/28 07:08:15'}]
+            {
+                "interface": "wlp3s0",
+                "fixed-address": "192.168.2.74",
+                "subnet-mask": "255.255.255.0",
+                "routers": "192.168.2.1",
+                "classless-static-routes": "0 130.56.240.1",
+                "renew": "4 2017/07/27 18:02:30",
+                "expire": "5 2017/07/28 07:08:15",
+            }
+        ]
         write_file(lease_file, content)
         self.assertCountEqual(expected, parse_dhcp_lease_file(lease_file))
 
-    @mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network')
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @mock.patch("cloudinit.net.dhcp.EphemeralIPv4Network")
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_obtain_lease_parses_static_routes(self, m_maybe, m_ipv4):
         """EphemeralDHPCv4 parses rfc3442 routes for EphemeralIPv4Network"""
         lease = [
-            {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74',
-             'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1',
-             'rfc3442-classless-static-routes': '0,130,56,240,1',
-             'renew': '4 2017/07/27 18:02:30',
-             'expire': '5 2017/07/28 07:08:15'}]
+            {
+                "interface": "wlp3s0",
+                "fixed-address": "192.168.2.74",
+                "subnet-mask": "255.255.255.0",
+                "routers": "192.168.2.1",
+                "rfc3442-classless-static-routes": "0,130,56,240,1",
+                "renew": "4 2017/07/27 18:02:30",
+                "expire": "5 2017/07/28 07:08:15",
+            }
+        ]
         m_maybe.return_value = lease
         eph = net.dhcp.EphemeralDHCPv4()
         eph.obtain_lease()
         expected_kwargs = {
-            'interface': 'wlp3s0',
-            'ip': '192.168.2.74',
-            'prefix_or_mask': '255.255.255.0',
-            'broadcast': '192.168.2.255',
-            'static_routes': [('0.0.0.0/0', '130.56.240.1')],
-            'router': '192.168.2.1'}
+            "interface": "wlp3s0",
+            "ip": "192.168.2.74",
+            "prefix_or_mask": "255.255.255.0",
+            "broadcast": "192.168.2.255",
+            "static_routes": [("0.0.0.0/0", "130.56.240.1")],
+            "router": "192.168.2.1",
+        }
         m_ipv4.assert_called_with(**expected_kwargs)
 
-    @mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network')
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @mock.patch("cloudinit.net.dhcp.EphemeralIPv4Network")
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_obtain_centos_lease_parses_static_routes(self, m_maybe, m_ipv4):
         """
         EphemeralDHPCv4 parses rfc3442 routes for EphemeralIPv4Network
         for Centos Lease format
         """
         lease = [
-            {'interface': 'wlp3s0', 'fixed-address': '192.168.2.74',
-             'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1',
-             'classless-static-routes': '0 130.56.240.1',
-             'renew': '4 2017/07/27 18:02:30',
-             'expire': '5 2017/07/28 07:08:15'}]
+            {
+                "interface": "wlp3s0",
+                "fixed-address": "192.168.2.74",
+                "subnet-mask": "255.255.255.0",
+                "routers": "192.168.2.1",
+                "classless-static-routes": "0 130.56.240.1",
+                "renew": "4 2017/07/27 18:02:30",
+                "expire": "5 2017/07/28 07:08:15",
+            }
+        ]
         m_maybe.return_value = lease
         eph = net.dhcp.EphemeralDHCPv4()
         eph.obtain_lease()
         expected_kwargs = {
-            'interface': 'wlp3s0',
-            'ip': '192.168.2.74',
-            'prefix_or_mask': '255.255.255.0',
-            'broadcast': '192.168.2.255',
-            'static_routes': [('0.0.0.0/0', '130.56.240.1')],
-            'router': '192.168.2.1'}
+            "interface": "wlp3s0",
+            "ip": "192.168.2.74",
+            "prefix_or_mask": "255.255.255.0",
+            "broadcast": "192.168.2.255",
+            "static_routes": [("0.0.0.0/0", "130.56.240.1")],
+            "router": "192.168.2.1",
+        }
         m_ipv4.assert_called_with(**expected_kwargs)
 
 
@@ -185,34 +230,45 @@ class TestDHCPParseStaticRoutes(CiTestCase):
 
     def test_parse_static_routes_single_ip(self):
         rfc3442 = "32,169,254,169,254,130,56,248,255"
-        self.assertEqual([('169.254.169.254/32', '130.56.248.255')],
-                         parse_static_routes(rfc3442))
+        self.assertEqual(
+            [("169.254.169.254/32", "130.56.248.255")],
+            parse_static_routes(rfc3442),
+        )
 
     def test_parse_static_routes_single_ip_handles_trailing_semicolon(self):
         rfc3442 = "32,169,254,169,254,130,56,248,255;"
-        self.assertEqual([('169.254.169.254/32', '130.56.248.255')],
-                         parse_static_routes(rfc3442))
+        self.assertEqual(
+            [("169.254.169.254/32", "130.56.248.255")],
+            parse_static_routes(rfc3442),
+        )
 
     def test_parse_static_routes_default_route(self):
         rfc3442 = "0,130,56,240,1"
-        self.assertEqual([('0.0.0.0/0', '130.56.240.1')],
-                         parse_static_routes(rfc3442))
+        self.assertEqual(
+            [("0.0.0.0/0", "130.56.240.1")], parse_static_routes(rfc3442)
+        )
 
     def test_unspecified_gateway(self):
         rfc3442 = "32,169,254,169,254,0,0,0,0"
-        self.assertEqual([('169.254.169.254/32', '0.0.0.0')],
-                         parse_static_routes(rfc3442))
+        self.assertEqual(
+            [("169.254.169.254/32", "0.0.0.0")], parse_static_routes(rfc3442)
+        )
 
     def test_parse_static_routes_class_c_b_a(self):
         class_c = "24,192,168,74,192,168,0,4"
         class_b = "16,172,16,172,16,0,4"
         class_a = "8,10,10,0,0,4"
         rfc3442 = ",".join([class_c, class_b, class_a])
-        self.assertEqual(sorted([
-            ("192.168.74.0/24", "192.168.0.4"),
-            ("172.16.0.0/16", "172.16.0.4"),
-            ("10.0.0.0/8", "10.0.0.4")
-        ]), sorted(parse_static_routes(rfc3442)))
+        self.assertEqual(
+            sorted(
+                [
+                    ("192.168.74.0/24", "192.168.0.4"),
+                    ("172.16.0.0/16", "172.16.0.4"),
+                    ("10.0.0.0/8", "10.0.0.4"),
+                ]
+            ),
+            sorted(parse_static_routes(rfc3442)),
+        )
 
     def test_parse_static_routes_logs_error_truncated(self):
         bad_rfc3442 = {
@@ -233,261 +289,341 @@ class TestDHCPParseStaticRoutes(CiTestCase):
         class_b = "16,172,16,172,16,0,4"
         class_a_error = "8,10,10,0,0"
         rfc3442 = ",".join([class_c, class_b, class_a_error])
-        self.assertEqual(sorted([
-            ("192.168.74.0/24", "192.168.0.4"),
-            ("172.16.0.0/16", "172.16.0.4"),
-        ]), sorted(parse_static_routes(rfc3442)))
+        self.assertEqual(
+            sorted(
+                [
+                    ("192.168.74.0/24", "192.168.0.4"),
+                    ("172.16.0.0/16", "172.16.0.4"),
+                ]
+            ),
+            sorted(parse_static_routes(rfc3442)),
+        )
 
         logs = self.logs.getvalue()
         self.assertIn(rfc3442, logs.splitlines()[0])
 
     def test_redhat_format(self):
         redhat_format = "24.191.168.128 192.168.128.1,0 192.168.128.1"
-        self.assertEqual(sorted([
-            ("191.168.128.0/24", "192.168.128.1"),
-            ("0.0.0.0/0", "192.168.128.1")
-        ]), sorted(parse_static_routes(redhat_format)))
+        self.assertEqual(
+            sorted(
+                [
+                    ("191.168.128.0/24", "192.168.128.1"),
+                    ("0.0.0.0/0", "192.168.128.1"),
+                ]
+            ),
+            sorted(parse_static_routes(redhat_format)),
+        )
 
     def test_redhat_format_with_a_space_too_much_after_comma(self):
         redhat_format = "24.191.168.128 192.168.128.1, 0 192.168.128.1"
-        self.assertEqual(sorted([
-            ("191.168.128.0/24", "192.168.128.1"),
-            ("0.0.0.0/0", "192.168.128.1")
-        ]), sorted(parse_static_routes(redhat_format)))
+        self.assertEqual(
+            sorted(
+                [
+                    ("191.168.128.0/24", "192.168.128.1"),
+                    ("0.0.0.0/0", "192.168.128.1"),
+                ]
+            ),
+            sorted(parse_static_routes(redhat_format)),
+        )
 
 
 class TestDHCPDiscoveryClean(CiTestCase):
     with_logs = True
 
-    @mock.patch('cloudinit.net.dhcp.find_fallback_nic')
+    @mock.patch("cloudinit.net.dhcp.find_fallback_nic")
     def test_no_fallback_nic_found(self, m_fallback_nic):
         """Log and do nothing when nic is absent and no fallback is found."""
         m_fallback_nic.return_value = None  # No fallback nic found
         self.assertEqual([], maybe_perform_dhcp_discovery())
         self.assertIn(
-            'Skip dhcp_discovery: Unable to find fallback nic.',
-            self.logs.getvalue())
+            "Skip dhcp_discovery: Unable to find fallback nic.",
+            self.logs.getvalue(),
+        )
 
     def test_provided_nic_does_not_exist(self):
         """When the provided nic doesn't exist, log a message and no-op."""
-        self.assertEqual([], maybe_perform_dhcp_discovery('idontexist'))
+        self.assertEqual([], maybe_perform_dhcp_discovery("idontexist"))
         self.assertIn(
-            'Skip dhcp_discovery: nic idontexist not found in get_devicelist.',
-            self.logs.getvalue())
+            "Skip dhcp_discovery: nic idontexist not found in get_devicelist.",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.net.dhcp.subp.which')
-    @mock.patch('cloudinit.net.dhcp.find_fallback_nic')
+    @mock.patch("cloudinit.net.dhcp.subp.which")
+    @mock.patch("cloudinit.net.dhcp.find_fallback_nic")
     def test_absent_dhclient_command(self, m_fallback, m_which):
         """When dhclient doesn't exist in the OS, log the issue and no-op."""
-        m_fallback.return_value = 'eth9'
+        m_fallback.return_value = "eth9"
         m_which.return_value = None  # dhclient isn't found
         self.assertEqual([], maybe_perform_dhcp_discovery())
         self.assertIn(
-            'Skip dhclient configuration: No dhclient command found.',
-            self.logs.getvalue())
-
-    @mock.patch('cloudinit.temp_utils.os.getuid')
-    @mock.patch('cloudinit.net.dhcp.dhcp_discovery')
-    @mock.patch('cloudinit.net.dhcp.subp.which')
-    @mock.patch('cloudinit.net.dhcp.find_fallback_nic')
+            "Skip dhclient configuration: No dhclient command found.",
+            self.logs.getvalue(),
+        )
+
+    @mock.patch("cloudinit.temp_utils.os.getuid")
+    @mock.patch("cloudinit.net.dhcp.dhcp_discovery")
+    @mock.patch("cloudinit.net.dhcp.subp.which")
+    @mock.patch("cloudinit.net.dhcp.find_fallback_nic")
     def test_dhclient_run_with_tmpdir(self, m_fback, m_which, m_dhcp, m_uid):
         """maybe_perform_dhcp_discovery passes tmpdir to dhcp_discovery."""
         m_uid.return_value = 0  # Fake root user for tmpdir
-        m_fback.return_value = 'eth9'
-        m_which.return_value = '/sbin/dhclient'
-        m_dhcp.return_value = {'address': '192.168.2.2'}
+        m_fback.return_value = "eth9"
+        m_which.return_value = "/sbin/dhclient"
+        m_dhcp.return_value = {"address": "192.168.2.2"}
         retval = wrap_and_call(
-            'cloudinit.temp_utils',
-            {'_TMPDIR': {'new': None},
-             'os.getuid': 0},
-            maybe_perform_dhcp_discovery)
-        self.assertEqual({'address': '192.168.2.2'}, retval)
+            "cloudinit.temp_utils",
+            {"_TMPDIR": {"new": None}, "os.getuid": 0},
+            maybe_perform_dhcp_discovery,
+        )
+        self.assertEqual({"address": "192.168.2.2"}, retval)
         self.assertEqual(
-            1, m_dhcp.call_count, 'dhcp_discovery not called once')
+            1, m_dhcp.call_count, "dhcp_discovery not called once"
+        )
         call = m_dhcp.call_args_list[0]
-        self.assertEqual('/sbin/dhclient', call[0][0])
-        self.assertEqual('eth9', call[0][1])
-        self.assertIn('/var/tmp/cloud-init/cloud-init-dhcp-', call[0][2])
-
-    @mock.patch('time.sleep', mock.MagicMock())
-    @mock.patch('cloudinit.net.dhcp.os.kill')
-    @mock.patch('cloudinit.net.dhcp.subp.subp')
-    def test_dhcp_discovery_run_in_sandbox_warns_invalid_pid(self, m_subp,
-                                                             m_kill):
+        self.assertEqual("/sbin/dhclient", call[0][0])
+        self.assertEqual("eth9", call[0][1])
+        self.assertIn("/var/tmp/cloud-init/cloud-init-dhcp-", call[0][2])
+
+    @mock.patch("time.sleep", mock.MagicMock())
+    @mock.patch("cloudinit.net.dhcp.os.kill")
+    @mock.patch("cloudinit.net.dhcp.subp.subp")
+    def test_dhcp_discovery_run_in_sandbox_warns_invalid_pid(
+        self, m_subp, m_kill
+    ):
         """dhcp_discovery logs a warning when pidfile contains invalid content.
 
         Lease processing still occurs and no proc kill is attempted.
         """
-        m_subp.return_value = ('', '')
+        m_subp.return_value = ("", "")
         tmpdir = self.tmp_dir()
-        dhclient_script = os.path.join(tmpdir, 'dhclient.orig')
-        script_content = '#!/bin/bash\necho fake-dhclient'
+        dhclient_script = os.path.join(tmpdir, "dhclient.orig")
+        script_content = "#!/bin/bash\necho fake-dhclient"
         write_file(dhclient_script, script_content, mode=0o755)
-        write_file(self.tmp_path('dhclient.pid', tmpdir), '')  # Empty pid ''
-        lease_content = dedent("""
+        write_file(self.tmp_path("dhclient.pid", tmpdir), "")  # Empty pid ''
+        lease_content = dedent(
+            """
             lease {
               interface "eth9";
               fixed-address 192.168.2.74;
               option subnet-mask 255.255.255.0;
               option routers 192.168.2.1;
             }
-        """)
-        write_file(self.tmp_path('dhcp.leases', tmpdir), lease_content)
+        """
+        )
+        write_file(self.tmp_path("dhcp.leases", tmpdir), lease_content)
 
         self.assertCountEqual(
-            [{'interface': 'eth9', 'fixed-address': '192.168.2.74',
-              'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1'}],
-            dhcp_discovery(dhclient_script, 'eth9', tmpdir))
+            [
+                {
+                    "interface": "eth9",
+                    "fixed-address": "192.168.2.74",
+                    "subnet-mask": "255.255.255.0",
+                    "routers": "192.168.2.1",
+                }
+            ],
+            dhcp_discovery(dhclient_script, "eth9", tmpdir),
+        )
         self.assertIn(
             "dhclient(pid=, parentpid=unknown) failed "
             "to daemonize after 10.0 seconds",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
         m_kill.assert_not_called()
 
-    @mock.patch('cloudinit.net.dhcp.util.get_proc_ppid')
-    @mock.patch('cloudinit.net.dhcp.os.kill')
-    @mock.patch('cloudinit.net.dhcp.util.wait_for_files')
-    @mock.patch('cloudinit.net.dhcp.subp.subp')
-    def test_dhcp_discovery_run_in_sandbox_waits_on_lease_and_pid(self,
-                                                                  m_subp,
-                                                                  m_wait,
-                                                                  m_kill,
-                                                                  m_getppid):
+    @mock.patch("cloudinit.net.dhcp.util.get_proc_ppid")
+    @mock.patch("cloudinit.net.dhcp.os.kill")
+    @mock.patch("cloudinit.net.dhcp.util.wait_for_files")
+    @mock.patch("cloudinit.net.dhcp.subp.subp")
+    def test_dhcp_discovery_run_in_sandbox_waits_on_lease_and_pid(
+        self, m_subp, m_wait, m_kill, m_getppid
+    ):
         """dhcp_discovery waits for the presence of pidfile and dhcp.leases."""
-        m_subp.return_value = ('', '')
+        m_subp.return_value = ("", "")
         tmpdir = self.tmp_dir()
-        dhclient_script = os.path.join(tmpdir, 'dhclient.orig')
-        script_content = '#!/bin/bash\necho fake-dhclient'
+        dhclient_script = os.path.join(tmpdir, "dhclient.orig")
+        script_content = "#!/bin/bash\necho fake-dhclient"
         write_file(dhclient_script, script_content, mode=0o755)
         # Don't create pid or leases file
-        pidfile = self.tmp_path('dhclient.pid', tmpdir)
-        leasefile = self.tmp_path('dhcp.leases', tmpdir)
+        pidfile = self.tmp_path("dhclient.pid", tmpdir)
+        leasefile = self.tmp_path("dhcp.leases", tmpdir)
         m_wait.return_value = [pidfile]  # Return the missing pidfile wait for
         m_getppid.return_value = 1  # Indicate that dhclient has daemonized
-        self.assertEqual([], dhcp_discovery(dhclient_script, 'eth9', tmpdir))
+        self.assertEqual([], dhcp_discovery(dhclient_script, "eth9", tmpdir))
         self.assertEqual(
             mock.call([pidfile, leasefile], maxwait=5, naplen=0.01),
-            m_wait.call_args_list[0])
+            m_wait.call_args_list[0],
+        )
         self.assertIn(
-            'WARNING: dhclient did not produce expected files: dhclient.pid',
-            self.logs.getvalue())
+            "WARNING: dhclient did not produce expected files: dhclient.pid",
+            self.logs.getvalue(),
+        )
         m_kill.assert_not_called()
 
-    @mock.patch('cloudinit.net.dhcp.util.get_proc_ppid')
-    @mock.patch('cloudinit.net.dhcp.os.kill')
-    @mock.patch('cloudinit.net.dhcp.subp.subp')
+    @mock.patch("cloudinit.net.dhcp.util.get_proc_ppid")
+    @mock.patch("cloudinit.net.dhcp.os.kill")
+    @mock.patch("cloudinit.net.dhcp.subp.subp")
     def test_dhcp_discovery_run_in_sandbox(self, m_subp, m_kill, m_getppid):
         """dhcp_discovery brings up the interface and runs dhclient.
 
         It also returns the parsed dhcp.leases file generated in the sandbox.
         """
-        m_subp.return_value = ('', '')
+        m_subp.return_value = ("", "")
         tmpdir = self.tmp_dir()
-        dhclient_script = os.path.join(tmpdir, 'dhclient.orig')
-        script_content = '#!/bin/bash\necho fake-dhclient'
+        dhclient_script = os.path.join(tmpdir, "dhclient.orig")
+        script_content = "#!/bin/bash\necho fake-dhclient"
         write_file(dhclient_script, script_content, mode=0o755)
-        lease_content = dedent("""
+        lease_content = dedent(
+            """
             lease {
               interface "eth9";
               fixed-address 192.168.2.74;
               option subnet-mask 255.255.255.0;
               option routers 192.168.2.1;
             }
-        """)
-        lease_file = os.path.join(tmpdir, 'dhcp.leases')
+        """
+        )
+        lease_file = os.path.join(tmpdir, "dhcp.leases")
         write_file(lease_file, lease_content)
-        pid_file = os.path.join(tmpdir, 'dhclient.pid')
+        pid_file = os.path.join(tmpdir, "dhclient.pid")
         my_pid = 1
         write_file(pid_file, "%d\n" % my_pid)
         m_getppid.return_value = 1  # Indicate that dhclient has daemonized
 
         self.assertCountEqual(
-            [{'interface': 'eth9', 'fixed-address': '192.168.2.74',
-              'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1'}],
-            dhcp_discovery(dhclient_script, 'eth9', tmpdir))
+            [
+                {
+                    "interface": "eth9",
+                    "fixed-address": "192.168.2.74",
+                    "subnet-mask": "255.255.255.0",
+                    "routers": "192.168.2.1",
+                }
+            ],
+            dhcp_discovery(dhclient_script, "eth9", tmpdir),
+        )
         # dhclient script got copied
-        with open(os.path.join(tmpdir, 'dhclient')) as stream:
+        with open(os.path.join(tmpdir, "dhclient")) as stream:
             self.assertEqual(script_content, stream.read())
         # Interface was brought up before dhclient called from sandbox
-        m_subp.assert_has_calls([
-            mock.call(
-                ['ip', 'link', 'set', 'dev', 'eth9', 'up'], capture=True),
-            mock.call(
-                [os.path.join(tmpdir, 'dhclient'), '-1', '-v', '-lf',
-                 lease_file, '-pf', os.path.join(tmpdir, 'dhclient.pid'),
-                 'eth9', '-sf', '/bin/true'], capture=True)])
+        m_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["ip", "link", "set", "dev", "eth9", "up"], capture=True
+                ),
+                mock.call(
+                    [
+                        os.path.join(tmpdir, "dhclient"),
+                        "-1",
+                        "-v",
+                        "-lf",
+                        lease_file,
+                        "-pf",
+                        os.path.join(tmpdir, "dhclient.pid"),
+                        "eth9",
+                        "-sf",
+                        "/bin/true",
+                    ],
+                    capture=True,
+                ),
+            ]
+        )
         m_kill.assert_has_calls([mock.call(my_pid, signal.SIGKILL)])
 
-    @mock.patch('cloudinit.net.dhcp.util.get_proc_ppid')
-    @mock.patch('cloudinit.net.dhcp.os.kill')
-    @mock.patch('cloudinit.net.dhcp.subp.subp')
+    @mock.patch("cloudinit.net.dhcp.util.get_proc_ppid")
+    @mock.patch("cloudinit.net.dhcp.os.kill")
+    @mock.patch("cloudinit.net.dhcp.subp.subp")
     def test_dhcp_discovery_outside_sandbox(self, m_subp, m_kill, m_getppid):
         """dhcp_discovery brings up the interface and runs dhclient.
 
         It also returns the parsed dhcp.leases file generated in the sandbox.
         """
-        m_subp.return_value = ('', '')
+        m_subp.return_value = ("", "")
         tmpdir = self.tmp_dir()
-        dhclient_script = os.path.join(tmpdir, 'dhclient.orig')
-        script_content = '#!/bin/bash\necho fake-dhclient'
+        dhclient_script = os.path.join(tmpdir, "dhclient.orig")
+        script_content = "#!/bin/bash\necho fake-dhclient"
         write_file(dhclient_script, script_content, mode=0o755)
-        lease_content = dedent("""
+        lease_content = dedent(
+            """
             lease {
               interface "eth9";
               fixed-address 192.168.2.74;
               option subnet-mask 255.255.255.0;
               option routers 192.168.2.1;
             }
-        """)
-        lease_file = os.path.join(tmpdir, 'dhcp.leases')
+        """
+        )
+        lease_file = os.path.join(tmpdir, "dhcp.leases")
         write_file(lease_file, lease_content)
-        pid_file = os.path.join(tmpdir, 'dhclient.pid')
+        pid_file = os.path.join(tmpdir, "dhclient.pid")
         my_pid = 1
         write_file(pid_file, "%d\n" % my_pid)
         m_getppid.return_value = 1  # Indicate that dhclient has daemonized
 
-        with mock.patch('os.access', return_value=False):
+        with mock.patch("os.access", return_value=False):
             self.assertCountEqual(
-                [{'interface': 'eth9', 'fixed-address': '192.168.2.74',
-                  'subnet-mask': '255.255.255.0', 'routers': '192.168.2.1'}],
-                dhcp_discovery(dhclient_script, 'eth9', tmpdir))
+                [
+                    {
+                        "interface": "eth9",
+                        "fixed-address": "192.168.2.74",
+                        "subnet-mask": "255.255.255.0",
+                        "routers": "192.168.2.1",
+                    }
+                ],
+                dhcp_discovery(dhclient_script, "eth9", tmpdir),
+            )
         # dhclient script got copied
-        with open(os.path.join(tmpdir, 'dhclient.orig')) as stream:
+        with open(os.path.join(tmpdir, "dhclient.orig")) as stream:
             self.assertEqual(script_content, stream.read())
         # Interface was brought up before dhclient called from sandbox
-        m_subp.assert_has_calls([
-            mock.call(
-                ['ip', 'link', 'set', 'dev', 'eth9', 'up'], capture=True),
-            mock.call(
-                [os.path.join(tmpdir, 'dhclient.orig'), '-1', '-v', '-lf',
-                 lease_file, '-pf', os.path.join(tmpdir, 'dhclient.pid'),
-                 'eth9', '-sf', '/bin/true'], capture=True)])
+        m_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["ip", "link", "set", "dev", "eth9", "up"], capture=True
+                ),
+                mock.call(
+                    [
+                        os.path.join(tmpdir, "dhclient.orig"),
+                        "-1",
+                        "-v",
+                        "-lf",
+                        lease_file,
+                        "-pf",
+                        os.path.join(tmpdir, "dhclient.pid"),
+                        "eth9",
+                        "-sf",
+                        "/bin/true",
+                    ],
+                    capture=True,
+                ),
+            ]
+        )
         m_kill.assert_has_calls([mock.call(my_pid, signal.SIGKILL)])
 
-    @mock.patch('cloudinit.net.dhcp.util.get_proc_ppid')
-    @mock.patch('cloudinit.net.dhcp.os.kill')
-    @mock.patch('cloudinit.net.dhcp.subp.subp')
+    @mock.patch("cloudinit.net.dhcp.util.get_proc_ppid")
+    @mock.patch("cloudinit.net.dhcp.os.kill")
+    @mock.patch("cloudinit.net.dhcp.subp.subp")
     def test_dhcp_output_error_stream(self, m_subp, m_kill, m_getppid):
-        """"dhcp_log_func is called with the output and error streams of
+        """ "dhcp_log_func is called with the output and error streams of
         dhclinet when the callable is passed."""
-        dhclient_err = 'FAKE DHCLIENT ERROR'
-        dhclient_out = 'FAKE DHCLIENT OUT'
+        dhclient_err = "FAKE DHCLIENT ERROR"
+        dhclient_out = "FAKE DHCLIENT OUT"
         m_subp.return_value = (dhclient_out, dhclient_err)
         tmpdir = self.tmp_dir()
-        dhclient_script = os.path.join(tmpdir, 'dhclient.orig')
-        script_content = '#!/bin/bash\necho fake-dhclient'
+        dhclient_script = os.path.join(tmpdir, "dhclient.orig")
+        script_content = "#!/bin/bash\necho fake-dhclient"
         write_file(dhclient_script, script_content, mode=0o755)
-        lease_content = dedent("""
+        lease_content = dedent(
+            """
                 lease {
                   interface "eth9";
                   fixed-address 192.168.2.74;
                   option subnet-mask 255.255.255.0;
                   option routers 192.168.2.1;
                 }
-            """)
-        lease_file = os.path.join(tmpdir, 'dhcp.leases')
+            """
+        )
+        lease_file = os.path.join(tmpdir, "dhcp.leases")
         write_file(lease_file, lease_content)
-        pid_file = os.path.join(tmpdir, 'dhclient.pid')
+        pid_file = os.path.join(tmpdir, "dhclient.pid")
         my_pid = 1
         write_file(pid_file, "%d\n" % my_pid)
         m_getppid.return_value = 1  # Indicate that dhclient has daemonized
@@ -497,12 +633,14 @@ class TestDHCPDiscoveryClean(CiTestCase):
             self.assertEqual(err, dhclient_err)
 
         dhcp_discovery(
-            dhclient_script, 'eth9', tmpdir, dhcp_log_func=dhcp_log_func)
+            dhclient_script, "eth9", tmpdir, dhcp_log_func=dhcp_log_func
+        )
 
 
 class TestSystemdParseLeases(CiTestCase):
 
-    lxd_lease = dedent("""\
+    lxd_lease = dedent(
+        """\
     # This is private data. Do not parse.
     ADDRESS=10.75.205.242
     NETMASK=255.255.255.0
@@ -517,25 +655,27 @@ class TestSystemdParseLeases(CiTestCase):
     DOMAINNAME=lxd
     HOSTNAME=a1
     CLIENTID=ffe617693400020000ab110c65a6a0866931c2
-    """)
+    """
+    )
 
     lxd_parsed = {
-        'ADDRESS': '10.75.205.242',
-        'NETMASK': '255.255.255.0',
-        'ROUTER': '10.75.205.1',
-        'SERVER_ADDRESS': '10.75.205.1',
-        'NEXT_SERVER': '10.75.205.1',
-        'BROADCAST': '10.75.205.255',
-        'T1': '1580',
-        'T2': '2930',
-        'LIFETIME': '3600',
-        'DNS': '10.75.205.1',
-        'DOMAINNAME': 'lxd',
-        'HOSTNAME': 'a1',
-        'CLIENTID': 'ffe617693400020000ab110c65a6a0866931c2',
+        "ADDRESS": "10.75.205.242",
+        "NETMASK": "255.255.255.0",
+        "ROUTER": "10.75.205.1",
+        "SERVER_ADDRESS": "10.75.205.1",
+        "NEXT_SERVER": "10.75.205.1",
+        "BROADCAST": "10.75.205.255",
+        "T1": "1580",
+        "T2": "2930",
+        "LIFETIME": "3600",
+        "DNS": "10.75.205.1",
+        "DOMAINNAME": "lxd",
+        "HOSTNAME": "a1",
+        "CLIENTID": "ffe617693400020000ab110c65a6a0866931c2",
     }
 
-    azure_lease = dedent("""\
+    azure_lease = dedent(
+        """\
     # This is private data. Do not parse.
     ADDRESS=10.132.0.5
     NETMASK=255.255.255.255
@@ -554,26 +694,28 @@ class TestSystemdParseLeases(CiTestCase):
     ROUTES=10.132.0.1/32,0.0.0.0 0.0.0.0/0,10.132.0.1
     CLIENTID=ff405663a200020000ab11332859494d7a8b4c
     OPTION_245=624c3620
-    """)
+    """
+    )
 
     azure_parsed = {
-        'ADDRESS': '10.132.0.5',
-        'NETMASK': '255.255.255.255',
-        'ROUTER': '10.132.0.1',
-        'SERVER_ADDRESS': '169.254.169.254',
-        'NEXT_SERVER': '10.132.0.1',
-        'MTU': '1460',
-        'T1': '43200',
-        'T2': '75600',
-        'LIFETIME': '86400',
-        'DNS': '169.254.169.254',
-        'NTP': '169.254.169.254',
-        'DOMAINNAME': 'c.ubuntu-foundations.internal',
-        'DOMAIN_SEARCH_LIST': 'c.ubuntu-foundations.internal google.internal',
-        'HOSTNAME': 'tribaal-test-171002-1349.c.ubuntu-foundations.internal',
-        'ROUTES': '10.132.0.1/32,0.0.0.0 0.0.0.0/0,10.132.0.1',
-        'CLIENTID': 'ff405663a200020000ab11332859494d7a8b4c',
-        'OPTION_245': '624c3620'}
+        "ADDRESS": "10.132.0.5",
+        "NETMASK": "255.255.255.255",
+        "ROUTER": "10.132.0.1",
+        "SERVER_ADDRESS": "169.254.169.254",
+        "NEXT_SERVER": "10.132.0.1",
+        "MTU": "1460",
+        "T1": "43200",
+        "T2": "75600",
+        "LIFETIME": "86400",
+        "DNS": "169.254.169.254",
+        "NTP": "169.254.169.254",
+        "DOMAINNAME": "c.ubuntu-foundations.internal",
+        "DOMAIN_SEARCH_LIST": "c.ubuntu-foundations.internal google.internal",
+        "HOSTNAME": "tribaal-test-171002-1349.c.ubuntu-foundations.internal",
+        "ROUTES": "10.132.0.1/32,0.0.0.0 0.0.0.0/0,10.132.0.1",
+        "CLIENTID": "ff405663a200020000ab11332859494d7a8b4c",
+        "OPTION_245": "624c3620",
+    }
 
     def setUp(self):
         super(TestSystemdParseLeases, self).setUp()
@@ -585,63 +727,71 @@ class TestSystemdParseLeases(CiTestCase):
 
     def test_no_leases_dir_returns_empty_dict(self):
         """A non-existing leases dir should return empty dict."""
-        enodir = os.path.join(self.lease_d, 'does-not-exist')
+        enodir = os.path.join(self.lease_d, "does-not-exist")
         self.assertEqual({}, networkd_load_leases(enodir))
 
     def test_single_leases_file(self):
         """A leases dir with one leases file."""
-        populate_dir(self.lease_d, {'2': self.lxd_lease})
+        populate_dir(self.lease_d, {"2": self.lxd_lease})
         self.assertEqual(
-            {'2': self.lxd_parsed}, networkd_load_leases(self.lease_d))
+            {"2": self.lxd_parsed}, networkd_load_leases(self.lease_d)
+        )
 
     def test_single_azure_leases_file(self):
         """On Azure, option 245 should be present, verify it specifically."""
-        populate_dir(self.lease_d, {'1': self.azure_lease})
+        populate_dir(self.lease_d, {"1": self.azure_lease})
         self.assertEqual(
-            {'1': self.azure_parsed}, networkd_load_leases(self.lease_d))
+            {"1": self.azure_parsed}, networkd_load_leases(self.lease_d)
+        )
 
     def test_multiple_files(self):
         """Multiple leases files on azure with one found return that value."""
         self.maxDiff = None
-        populate_dir(self.lease_d, {'1': self.azure_lease,
-                                    '9': self.lxd_lease})
-        self.assertEqual({'1': self.azure_parsed, '9': self.lxd_parsed},
-                         networkd_load_leases(self.lease_d))
+        populate_dir(
+            self.lease_d, {"1": self.azure_lease, "9": self.lxd_lease}
+        )
+        self.assertEqual(
+            {"1": self.azure_parsed, "9": self.lxd_parsed},
+            networkd_load_leases(self.lease_d),
+        )
 
 
 class TestEphemeralDhcpNoNetworkSetup(HttprettyTestCase):
-
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_ephemeral_dhcp_no_network_if_url_connectivity(self, m_dhcp):
         """No EphemeralDhcp4 network setup when connectivity_url succeeds."""
-        url = 'http://example.org/index.html'
+        url = "http://example.org/index.html"
 
         httpretty.register_uri(httpretty.GET, url)
         with net.dhcp.EphemeralDHCPv4(
-            connectivity_url_data={'url': url},
+            connectivity_url_data={"url": url},
         ) as lease:
             self.assertIsNone(lease)
         # Ensure that no teardown happens:
         m_dhcp.assert_not_called()
 
-    @mock.patch('cloudinit.net.dhcp.subp.subp')
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @mock.patch("cloudinit.net.dhcp.subp.subp")
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_ephemeral_dhcp_setup_network_if_url_connectivity(
-            self, m_dhcp, m_subp):
+        self, m_dhcp, m_subp
+    ):
         """No EphemeralDhcp4 network setup when connectivity_url succeeds."""
-        url = 'http://example.org/index.html'
+        url = "http://example.org/index.html"
         fake_lease = {
-            'interface': 'eth9', 'fixed-address': '192.168.2.2',
-            'subnet-mask': '255.255.0.0'}
+            "interface": "eth9",
+            "fixed-address": "192.168.2.2",
+            "subnet-mask": "255.255.0.0",
+        }
         m_dhcp.return_value = [fake_lease]
-        m_subp.return_value = ('', '')
+        m_subp.return_value = ("", "")
 
         httpretty.register_uri(httpretty.GET, url, body={}, status=404)
         with net.dhcp.EphemeralDHCPv4(
-            connectivity_url_data={'url': url},
+            connectivity_url_data={"url": url},
         ) as lease:
             self.assertEqual(fake_lease, lease)
         # Ensure that dhcp discovery occurs
         m_dhcp.called_once_with()
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/net/test_init.py b/tests/unittests/net/test_init.py
index 82854ab3..b245da94 100644
--- a/tests/unittests/net/test_init.py
+++ b/tests/unittests/net/test_init.py
@@ -13,24 +13,23 @@ import requests
 
 import cloudinit.net as net
 from cloudinit import safeyaml as yaml
-from tests.unittests.helpers import CiTestCase, HttprettyTestCase
 from cloudinit.subp import ProcessExecutionError
 from cloudinit.util import ensure_file, write_file
+from tests.unittests.helpers import CiTestCase, HttprettyTestCase
 
 
 class TestSysDevPath(CiTestCase):
-
     def test_sys_dev_path(self):
         """sys_dev_path returns a path under SYS_CLASS_NET for a device."""
-        dev = 'something'
-        path = 'attribute'
-        expected = net.SYS_CLASS_NET + dev + '/' + path
+        dev = "something"
+        path = "attribute"
+        expected = net.SYS_CLASS_NET + dev + "/" + path
         self.assertEqual(expected, net.sys_dev_path(dev, path))
 
     def test_sys_dev_path_without_path(self):
         """When path param isn't provided it defaults to empty string."""
-        dev = 'something'
-        expected = net.SYS_CLASS_NET + dev + '/'
+        dev = "something"
+        expected = net.SYS_CLASS_NET + dev + "/"
         self.assertEqual(expected, net.sys_dev_path(dev))
 
 
@@ -39,25 +38,25 @@ class TestReadSysNet(CiTestCase):
 
     def setUp(self):
         super(TestReadSysNet, self).setUp()
-        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
+        sys_mock = mock.patch("cloudinit.net.get_sys_class_path")
         self.m_sys_path = sys_mock.start()
-        self.sysdir = self.tmp_dir() + '/'
+        self.sysdir = self.tmp_dir() + "/"
         self.m_sys_path.return_value = self.sysdir
         self.addCleanup(sys_mock.stop)
 
     def test_read_sys_net_strips_contents_of_sys_path(self):
         """read_sys_net strips whitespace from the contents of a sys file."""
-        content = 'some stuff with trailing whitespace\t\r\n'
-        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
-        self.assertEqual(content.strip(), net.read_sys_net('dev', 'attr'))
+        content = "some stuff with trailing whitespace\t\r\n"
+        write_file(os.path.join(self.sysdir, "dev", "attr"), content)
+        self.assertEqual(content.strip(), net.read_sys_net("dev", "attr"))
 
     def test_read_sys_net_reraises_oserror(self):
         """read_sys_net raises OSError/IOError when file doesn't exist."""
         # Non-specific Exception because versions of python OSError vs IOError.
         with self.assertRaises(Exception) as context_manager:  # noqa: H202
-            net.read_sys_net('dev', 'attr')
+            net.read_sys_net("dev", "attr")
         error = context_manager.exception
-        self.assertIn('No such file or directory', str(error))
+        self.assertIn("No such file or directory", str(error))
 
     def test_read_sys_net_handles_error_with_on_enoent(self):
         """read_sys_net handles OSError/IOError with on_enoent if provided."""
@@ -66,43 +65,44 @@ class TestReadSysNet(CiTestCase):
         def on_enoent(e):
             handled_errors.append(e)
 
-        net.read_sys_net('dev', 'attr', on_enoent=on_enoent)
+        net.read_sys_net("dev", "attr", on_enoent=on_enoent)
         error = handled_errors[0]
         self.assertIsInstance(error, Exception)
-        self.assertIn('No such file or directory', str(error))
+        self.assertIn("No such file or directory", str(error))
 
     def test_read_sys_net_translates_content(self):
         """read_sys_net translates content when translate dict is provided."""
         content = "you're welcome\n"
-        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
-        translate = {"you're welcome": 'de nada'}
+        write_file(os.path.join(self.sysdir, "dev", "attr"), content)
+        translate = {"you're welcome": "de nada"}
         self.assertEqual(
-            'de nada',
-            net.read_sys_net('dev', 'attr', translate=translate))
+            "de nada", net.read_sys_net("dev", "attr", translate=translate)
+        )
 
     def test_read_sys_net_errors_on_translation_failures(self):
         """read_sys_net raises a KeyError and logs details on failure."""
         content = "you're welcome\n"
-        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
+        write_file(os.path.join(self.sysdir, "dev", "attr"), content)
         with self.assertRaises(KeyError) as context_manager:
-            net.read_sys_net('dev', 'attr', translate={})
+            net.read_sys_net("dev", "attr", translate={})
         error = context_manager.exception
         self.assertEqual('"you\'re welcome"', str(error))
         self.assertIn(
             "Found unexpected (not translatable) value 'you're welcome' in "
             "'{0}dev/attr".format(self.sysdir),
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
     def test_read_sys_net_handles_handles_with_onkeyerror(self):
         """read_sys_net handles translation errors calling on_keyerror."""
         content = "you're welcome\n"
-        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
+        write_file(os.path.join(self.sysdir, "dev", "attr"), content)
         handled_errors = []
 
         def on_keyerror(e):
             handled_errors.append(e)
 
-        net.read_sys_net('dev', 'attr', translate={}, on_keyerror=on_keyerror)
+        net.read_sys_net("dev", "attr", translate={}, on_keyerror=on_keyerror)
         error = handled_errors[0]
         self.assertIsInstance(error, KeyError)
         self.assertEqual('"you\'re welcome"', str(error))
@@ -110,274 +110,308 @@ class TestReadSysNet(CiTestCase):
     def test_read_sys_net_safe_false_on_translate_failure(self):
         """read_sys_net_safe returns False on translation failures."""
         content = "you're welcome\n"
-        write_file(os.path.join(self.sysdir, 'dev', 'attr'), content)
-        self.assertFalse(net.read_sys_net_safe('dev', 'attr', translate={}))
+        write_file(os.path.join(self.sysdir, "dev", "attr"), content)
+        self.assertFalse(net.read_sys_net_safe("dev", "attr", translate={}))
 
     def test_read_sys_net_safe_returns_false_on_noent_failure(self):
         """read_sys_net_safe returns False on file not found failures."""
-        self.assertFalse(net.read_sys_net_safe('dev', 'attr'))
+        self.assertFalse(net.read_sys_net_safe("dev", "attr"))
 
     def test_read_sys_net_int_returns_none_on_error(self):
         """read_sys_net_safe returns None on failures."""
-        self.assertFalse(net.read_sys_net_int('dev', 'attr'))
+        self.assertFalse(net.read_sys_net_int("dev", "attr"))
 
     def test_read_sys_net_int_returns_none_on_valueerror(self):
         """read_sys_net_safe returns None when content is not an int."""
-        write_file(os.path.join(self.sysdir, 'dev', 'attr'), 'NOTINT\n')
-        self.assertFalse(net.read_sys_net_int('dev', 'attr'))
+        write_file(os.path.join(self.sysdir, "dev", "attr"), "NOTINT\n")
+        self.assertFalse(net.read_sys_net_int("dev", "attr"))
 
     def test_read_sys_net_int_returns_integer_from_content(self):
         """read_sys_net_safe returns None on failures."""
-        write_file(os.path.join(self.sysdir, 'dev', 'attr'), '1\n')
-        self.assertEqual(1, net.read_sys_net_int('dev', 'attr'))
+        write_file(os.path.join(self.sysdir, "dev", "attr"), "1\n")
+        self.assertEqual(1, net.read_sys_net_int("dev", "attr"))
 
     def test_is_up_true(self):
         """is_up is True if sys/net/devname/operstate is 'up' or 'unknown'."""
-        for state in ['up', 'unknown']:
-            write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), state)
-            self.assertTrue(net.is_up('eth0'))
+        for state in ["up", "unknown"]:
+            write_file(os.path.join(self.sysdir, "eth0", "operstate"), state)
+            self.assertTrue(net.is_up("eth0"))
 
     def test_is_up_false(self):
         """is_up is False if sys/net/devname/operstate is 'down' or invalid."""
-        for state in ['down', 'incomprehensible']:
-            write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), state)
-            self.assertFalse(net.is_up('eth0'))
+        for state in ["down", "incomprehensible"]:
+            write_file(os.path.join(self.sysdir, "eth0", "operstate"), state)
+            self.assertFalse(net.is_up("eth0"))
 
     def test_is_bridge(self):
         """is_bridge is True when /sys/net/devname/bridge exists."""
-        self.assertFalse(net.is_bridge('eth0'))
-        ensure_file(os.path.join(self.sysdir, 'eth0', 'bridge'))
-        self.assertTrue(net.is_bridge('eth0'))
+        self.assertFalse(net.is_bridge("eth0"))
+        ensure_file(os.path.join(self.sysdir, "eth0", "bridge"))
+        self.assertTrue(net.is_bridge("eth0"))
 
     def test_is_bond(self):
         """is_bond is True when /sys/net/devname/bonding exists."""
-        self.assertFalse(net.is_bond('eth0'))
-        ensure_file(os.path.join(self.sysdir, 'eth0', 'bonding'))
-        self.assertTrue(net.is_bond('eth0'))
+        self.assertFalse(net.is_bond("eth0"))
+        ensure_file(os.path.join(self.sysdir, "eth0", "bonding"))
+        self.assertTrue(net.is_bond("eth0"))
 
     def test_get_master(self):
         """get_master returns the path when /sys/net/devname/master exists."""
-        self.assertIsNone(net.get_master('enP1s1'))
-        master_path = os.path.join(self.sysdir, 'enP1s1', 'master')
+        self.assertIsNone(net.get_master("enP1s1"))
+        master_path = os.path.join(self.sysdir, "enP1s1", "master")
         ensure_file(master_path)
-        self.assertEqual(master_path, net.get_master('enP1s1'))
+        self.assertEqual(master_path, net.get_master("enP1s1"))
 
     def test_master_is_bridge_or_bond(self):
-        bridge_mac = 'aa:bb:cc:aa:bb:cc'
-        bond_mac = 'cc:bb:aa:cc:bb:aa'
+        bridge_mac = "aa:bb:cc:aa:bb:cc"
+        bond_mac = "cc:bb:aa:cc:bb:aa"
 
         # No master => False
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), bridge_mac)
-        write_file(os.path.join(self.sysdir, 'eth2', 'address'), bond_mac)
+        write_file(os.path.join(self.sysdir, "eth1", "address"), bridge_mac)
+        write_file(os.path.join(self.sysdir, "eth2", "address"), bond_mac)
 
-        self.assertFalse(net.master_is_bridge_or_bond('eth1'))
-        self.assertFalse(net.master_is_bridge_or_bond('eth2'))
+        self.assertFalse(net.master_is_bridge_or_bond("eth1"))
+        self.assertFalse(net.master_is_bridge_or_bond("eth2"))
 
         # masters without bridge/bonding => False
-        write_file(os.path.join(self.sysdir, 'br0', 'address'), bridge_mac)
-        write_file(os.path.join(self.sysdir, 'bond0', 'address'), bond_mac)
+        write_file(os.path.join(self.sysdir, "br0", "address"), bridge_mac)
+        write_file(os.path.join(self.sysdir, "bond0", "address"), bond_mac)
 
-        os.symlink('../br0', os.path.join(self.sysdir, 'eth1', 'master'))
-        os.symlink('../bond0', os.path.join(self.sysdir, 'eth2', 'master'))
+        os.symlink("../br0", os.path.join(self.sysdir, "eth1", "master"))
+        os.symlink("../bond0", os.path.join(self.sysdir, "eth2", "master"))
 
-        self.assertFalse(net.master_is_bridge_or_bond('eth1'))
-        self.assertFalse(net.master_is_bridge_or_bond('eth2'))
+        self.assertFalse(net.master_is_bridge_or_bond("eth1"))
+        self.assertFalse(net.master_is_bridge_or_bond("eth2"))
 
         # masters with bridge/bonding => True
-        write_file(os.path.join(self.sysdir, 'br0', 'bridge'), '')
-        write_file(os.path.join(self.sysdir, 'bond0', 'bonding'), '')
+        write_file(os.path.join(self.sysdir, "br0", "bridge"), "")
+        write_file(os.path.join(self.sysdir, "bond0", "bonding"), "")
 
-        self.assertTrue(net.master_is_bridge_or_bond('eth1'))
-        self.assertTrue(net.master_is_bridge_or_bond('eth2'))
+        self.assertTrue(net.master_is_bridge_or_bond("eth1"))
+        self.assertTrue(net.master_is_bridge_or_bond("eth2"))
 
     def test_master_is_openvswitch(self):
-        ovs_mac = 'bb:cc:aa:bb:cc:aa'
+        ovs_mac = "bb:cc:aa:bb:cc:aa"
 
         # No master => False
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), ovs_mac)
+        write_file(os.path.join(self.sysdir, "eth1", "address"), ovs_mac)
 
-        self.assertFalse(net.master_is_bridge_or_bond('eth1'))
+        self.assertFalse(net.master_is_bridge_or_bond("eth1"))
 
         # masters without ovs-system => False
-        write_file(os.path.join(self.sysdir, 'ovs-system', 'address'), ovs_mac)
+        write_file(os.path.join(self.sysdir, "ovs-system", "address"), ovs_mac)
 
-        os.symlink('../ovs-system', os.path.join(self.sysdir, 'eth1',
-                   'master'))
+        os.symlink(
+            "../ovs-system", os.path.join(self.sysdir, "eth1", "master")
+        )
 
-        self.assertFalse(net.master_is_openvswitch('eth1'))
+        self.assertFalse(net.master_is_openvswitch("eth1"))
 
         # masters with ovs-system => True
-        os.symlink('../ovs-system', os.path.join(self.sysdir, 'eth1',
-                   'upper_ovs-system'))
+        os.symlink(
+            "../ovs-system",
+            os.path.join(self.sysdir, "eth1", "upper_ovs-system"),
+        )
 
-        self.assertTrue(net.master_is_openvswitch('eth1'))
+        self.assertTrue(net.master_is_openvswitch("eth1"))
 
     def test_is_vlan(self):
         """is_vlan is True when /sys/net/devname/uevent has DEVTYPE=vlan."""
-        ensure_file(os.path.join(self.sysdir, 'eth0', 'uevent'))
-        self.assertFalse(net.is_vlan('eth0'))
-        content = 'junk\nDEVTYPE=vlan\njunk\n'
-        write_file(os.path.join(self.sysdir, 'eth0', 'uevent'), content)
-        self.assertTrue(net.is_vlan('eth0'))
+        ensure_file(os.path.join(self.sysdir, "eth0", "uevent"))
+        self.assertFalse(net.is_vlan("eth0"))
+        content = "junk\nDEVTYPE=vlan\njunk\n"
+        write_file(os.path.join(self.sysdir, "eth0", "uevent"), content)
+        self.assertTrue(net.is_vlan("eth0"))
 
 
 class TestGenerateFallbackConfig(CiTestCase):
-
     def setUp(self):
         super(TestGenerateFallbackConfig, self).setUp()
-        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
+        sys_mock = mock.patch("cloudinit.net.get_sys_class_path")
         self.m_sys_path = sys_mock.start()
-        self.sysdir = self.tmp_dir() + '/'
+        self.sysdir = self.tmp_dir() + "/"
         self.m_sys_path.return_value = self.sysdir
         self.addCleanup(sys_mock.stop)
-        self.add_patch('cloudinit.net.util.is_container', 'm_is_container',
-                       return_value=False)
-        self.add_patch('cloudinit.net.util.udevadm_settle', 'm_settle')
-        self.add_patch('cloudinit.net.is_netfailover', 'm_netfail',
-                       return_value=False)
-        self.add_patch('cloudinit.net.is_netfail_master', 'm_netfail_master',
-                       return_value=False)
+        self.add_patch(
+            "cloudinit.net.util.is_container",
+            "m_is_container",
+            return_value=False,
+        )
+        self.add_patch("cloudinit.net.util.udevadm_settle", "m_settle")
+        self.add_patch(
+            "cloudinit.net.is_netfailover", "m_netfail", return_value=False
+        )
+        self.add_patch(
+            "cloudinit.net.is_netfail_master",
+            "m_netfail_master",
+            return_value=False,
+        )
 
     def test_generate_fallback_finds_connected_eth_with_mac(self):
         """generate_fallback_config finds any connected device with a mac."""
-        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
-        write_file(os.path.join(self.sysdir, 'eth1', 'carrier'), '1')
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac)
+        write_file(os.path.join(self.sysdir, "eth0", "carrier"), "1")
+        write_file(os.path.join(self.sysdir, "eth1", "carrier"), "1")
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth1", "address"), mac)
         expected = {
-            'ethernets': {'eth1': {'match': {'macaddress': mac},
-                                   'dhcp4': True, 'set-name': 'eth1'}},
-            'version': 2}
+            "ethernets": {
+                "eth1": {
+                    "match": {"macaddress": mac},
+                    "dhcp4": True,
+                    "set-name": "eth1",
+                }
+            },
+            "version": 2,
+        }
         self.assertEqual(expected, net.generate_fallback_config())
 
     def test_generate_fallback_finds_dormant_eth_with_mac(self):
         """generate_fallback_config finds any dormant device with a mac."""
-        write_file(os.path.join(self.sysdir, 'eth0', 'dormant'), '1')
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
+        write_file(os.path.join(self.sysdir, "eth0", "dormant"), "1")
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth0", "address"), mac)
         expected = {
-            'ethernets': {'eth0': {'match': {'macaddress': mac}, 'dhcp4': True,
-                                   'set-name': 'eth0'}},
-            'version': 2}
+            "ethernets": {
+                "eth0": {
+                    "match": {"macaddress": mac},
+                    "dhcp4": True,
+                    "set-name": "eth0",
+                }
+            },
+            "version": 2,
+        }
         self.assertEqual(expected, net.generate_fallback_config())
 
     def test_generate_fallback_finds_eth_by_operstate(self):
         """generate_fallback_config finds any dormant device with a mac."""
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth0", "address"), mac)
         expected = {
-            'ethernets': {
-                'eth0': {'dhcp4': True, 'match': {'macaddress': mac},
-                         'set-name': 'eth0'}},
-            'version': 2}
-        valid_operstates = ['dormant', 'down', 'lowerlayerdown', 'unknown']
+            "ethernets": {
+                "eth0": {
+                    "dhcp4": True,
+                    "match": {"macaddress": mac},
+                    "set-name": "eth0",
+                }
+            },
+            "version": 2,
+        }
+        valid_operstates = ["dormant", "down", "lowerlayerdown", "unknown"]
         for state in valid_operstates:
-            write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), state)
+            write_file(os.path.join(self.sysdir, "eth0", "operstate"), state)
             self.assertEqual(expected, net.generate_fallback_config())
-        write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), 'noworky')
+        write_file(os.path.join(self.sysdir, "eth0", "operstate"), "noworky")
         self.assertIsNone(net.generate_fallback_config())
 
     def test_generate_fallback_config_skips_veth(self):
         """generate_fallback_config will skip any veth interfaces."""
         # A connected veth which gets ignored
-        write_file(os.path.join(self.sysdir, 'veth0', 'carrier'), '1')
+        write_file(os.path.join(self.sysdir, "veth0", "carrier"), "1")
         self.assertIsNone(net.generate_fallback_config())
 
     def test_generate_fallback_config_skips_bridges(self):
         """generate_fallback_config will skip any bridges interfaces."""
         # A connected veth which gets ignored
-        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
-        ensure_file(os.path.join(self.sysdir, 'eth0', 'bridge'))
+        write_file(os.path.join(self.sysdir, "eth0", "carrier"), "1")
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth0", "address"), mac)
+        ensure_file(os.path.join(self.sysdir, "eth0", "bridge"))
         self.assertIsNone(net.generate_fallback_config())
 
     def test_generate_fallback_config_skips_bonds(self):
         """generate_fallback_config will skip any bonded interfaces."""
         # A connected veth which gets ignored
-        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth0', 'address'), mac)
-        ensure_file(os.path.join(self.sysdir, 'eth0', 'bonding'))
+        write_file(os.path.join(self.sysdir, "eth0", "carrier"), "1")
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth0", "address"), mac)
+        ensure_file(os.path.join(self.sysdir, "eth0", "bonding"))
         self.assertIsNone(net.generate_fallback_config())
 
     def test_generate_fallback_config_skips_netfail_devs(self):
         """gen_fallback_config ignores netfail primary,sby no mac on master."""
-        mac = 'aa:bb:cc:aa:bb:cc'  # netfailover devs share the same mac
-        for iface in ['ens3', 'ens3sby', 'enP0s1f3']:
-            write_file(os.path.join(self.sysdir, iface, 'carrier'), '1')
-            write_file(
-                os.path.join(self.sysdir, iface, 'addr_assign_type'), '0')
+        mac = "aa:bb:cc:aa:bb:cc"  # netfailover devs share the same mac
+        for iface in ["ens3", "ens3sby", "enP0s1f3"]:
+            write_file(os.path.join(self.sysdir, iface, "carrier"), "1")
             write_file(
-                os.path.join(self.sysdir, iface, 'address'), mac)
+                os.path.join(self.sysdir, iface, "addr_assign_type"), "0"
+            )
+            write_file(os.path.join(self.sysdir, iface, "address"), mac)
 
         def is_netfail(iface, _driver=None):
             # ens3 is the master
-            if iface == 'ens3':
+            if iface == "ens3":
                 return False
             return True
+
         self.m_netfail.side_effect = is_netfail
 
         def is_netfail_master(iface, _driver=None):
             # ens3 is the master
-            if iface == 'ens3':
+            if iface == "ens3":
                 return True
             return False
+
         self.m_netfail_master.side_effect = is_netfail_master
         expected = {
-            'ethernets': {
-                'ens3': {'dhcp4': True, 'match': {'name': 'ens3'},
-                         'set-name': 'ens3'}},
-            'version': 2}
+            "ethernets": {
+                "ens3": {
+                    "dhcp4": True,
+                    "match": {"name": "ens3"},
+                    "set-name": "ens3",
+                }
+            },
+            "version": 2,
+        }
         result = net.generate_fallback_config()
         self.assertEqual(expected, result)
 
 
 class TestNetFindFallBackNic(CiTestCase):
-
     def setUp(self):
         super(TestNetFindFallBackNic, self).setUp()
-        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
+        sys_mock = mock.patch("cloudinit.net.get_sys_class_path")
         self.m_sys_path = sys_mock.start()
-        self.sysdir = self.tmp_dir() + '/'
+        self.sysdir = self.tmp_dir() + "/"
         self.m_sys_path.return_value = self.sysdir
         self.addCleanup(sys_mock.stop)
-        self.add_patch('cloudinit.net.util.is_container', 'm_is_container',
-                       return_value=False)
-        self.add_patch('cloudinit.net.util.udevadm_settle', 'm_settle')
+        self.add_patch(
+            "cloudinit.net.util.is_container",
+            "m_is_container",
+            return_value=False,
+        )
+        self.add_patch("cloudinit.net.util.udevadm_settle", "m_settle")
 
     def test_generate_fallback_finds_first_connected_eth_with_mac(self):
         """find_fallback_nic finds any connected device with a mac."""
-        write_file(os.path.join(self.sysdir, 'eth0', 'carrier'), '1')
-        write_file(os.path.join(self.sysdir, 'eth1', 'carrier'), '1')
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac)
-        self.assertEqual('eth1', net.find_fallback_nic())
+        write_file(os.path.join(self.sysdir, "eth0", "carrier"), "1")
+        write_file(os.path.join(self.sysdir, "eth1", "carrier"), "1")
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth1", "address"), mac)
+        self.assertEqual("eth1", net.find_fallback_nic())
 
 
 class TestGetDeviceList(CiTestCase):
-
     def setUp(self):
         super(TestGetDeviceList, self).setUp()
-        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
+        sys_mock = mock.patch("cloudinit.net.get_sys_class_path")
         self.m_sys_path = sys_mock.start()
-        self.sysdir = self.tmp_dir() + '/'
+        self.sysdir = self.tmp_dir() + "/"
         self.m_sys_path.return_value = self.sysdir
         self.addCleanup(sys_mock.stop)
 
     def test_get_devicelist_raise_oserror(self):
         """get_devicelist raise any non-ENOENT OSerror."""
-        error = OSError('Can not do it')
+        error = OSError("Can not do it")
         error.errno = errno.EPERM  # Set non-ENOENT
         self.m_sys_path.side_effect = error
         with self.assertRaises(OSError) as context_manager:
             net.get_devicelist()
         exception = context_manager.exception
-        self.assertEqual('Can not do it', str(exception))
+        self.assertEqual("Can not do it", str(exception))
 
     def test_get_devicelist_empty_without_sys_net(self):
         """get_devicelist returns empty list when missing SYS_CLASS_NET."""
-        self.m_sys_path.return_value = 'idontexist'
+        self.m_sys_path.return_value = "idontexist"
         self.assertEqual([], net.get_devicelist())
 
     def test_get_devicelist_empty_with_no_devices_in_sys_net(self):
@@ -386,9 +420,9 @@ class TestGetDeviceList(CiTestCase):
 
     def test_get_devicelist_lists_any_subdirectories_in_sys_net(self):
         """get_devicelist returns a directory listing for SYS_CLASS_NET."""
-        write_file(os.path.join(self.sysdir, 'eth0', 'operstate'), 'up')
-        write_file(os.path.join(self.sysdir, 'eth1', 'operstate'), 'up')
-        self.assertCountEqual(['eth0', 'eth1'], net.get_devicelist())
+        write_file(os.path.join(self.sysdir, "eth0", "operstate"), "up")
+        write_file(os.path.join(self.sysdir, "eth1", "operstate"), "up")
+        self.assertCountEqual(["eth0", "eth1"], net.get_devicelist())
 
 
 @mock.patch(
@@ -396,239 +430,288 @@ class TestGetDeviceList(CiTestCase):
     mock.Mock(return_value=False),
 )
 class TestGetInterfaceMAC(CiTestCase):
-
     def setUp(self):
         super(TestGetInterfaceMAC, self).setUp()
-        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
+        sys_mock = mock.patch("cloudinit.net.get_sys_class_path")
         self.m_sys_path = sys_mock.start()
-        self.sysdir = self.tmp_dir() + '/'
+        self.sysdir = self.tmp_dir() + "/"
         self.m_sys_path.return_value = self.sysdir
         self.addCleanup(sys_mock.stop)
 
     def test_get_interface_mac_false_with_no_mac(self):
         """get_device_list returns False when no mac is reported."""
-        ensure_file(os.path.join(self.sysdir, 'eth0', 'bonding'))
-        mac_path = os.path.join(self.sysdir, 'eth0', 'address')
+        ensure_file(os.path.join(self.sysdir, "eth0", "bonding"))
+        mac_path = os.path.join(self.sysdir, "eth0", "address")
         self.assertFalse(os.path.exists(mac_path))
-        self.assertFalse(net.get_interface_mac('eth0'))
+        self.assertFalse(net.get_interface_mac("eth0"))
 
     def test_get_interface_mac(self):
         """get_interfaces returns the mac from SYS_CLASS_NET/dev/address."""
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac)
-        self.assertEqual(mac, net.get_interface_mac('eth1'))
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth1", "address"), mac)
+        self.assertEqual(mac, net.get_interface_mac("eth1"))
 
     def test_get_interface_mac_grabs_bonding_address(self):
         """get_interfaces returns the source device mac for bonded devices."""
-        source_dev_mac = 'aa:bb:cc:aa:bb:cc'
-        bonded_mac = 'dd:ee:ff:dd:ee:ff'
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), bonded_mac)
+        source_dev_mac = "aa:bb:cc:aa:bb:cc"
+        bonded_mac = "dd:ee:ff:dd:ee:ff"
+        write_file(os.path.join(self.sysdir, "eth1", "address"), bonded_mac)
         write_file(
-            os.path.join(self.sysdir, 'eth1', 'bonding_slave', 'perm_hwaddr'),
-            source_dev_mac)
-        self.assertEqual(source_dev_mac, net.get_interface_mac('eth1'))
+            os.path.join(self.sysdir, "eth1", "bonding_slave", "perm_hwaddr"),
+            source_dev_mac,
+        )
+        self.assertEqual(source_dev_mac, net.get_interface_mac("eth1"))
 
     def test_get_interfaces_empty_list_without_sys_net(self):
         """get_interfaces returns an empty list when missing SYS_CLASS_NET."""
-        self.m_sys_path.return_value = 'idontexist'
+        self.m_sys_path.return_value = "idontexist"
         self.assertEqual([], net.get_interfaces())
 
     def test_get_interfaces_by_mac_skips_empty_mac(self):
         """Ignore 00:00:00:00:00:00 addresses from get_interfaces_by_mac."""
-        empty_mac = '00:00:00:00:00:00'
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), empty_mac)
-        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '0')
-        write_file(os.path.join(self.sysdir, 'eth2', 'addr_assign_type'), '0')
-        write_file(os.path.join(self.sysdir, 'eth2', 'address'), mac)
-        expected = [('eth2', 'aa:bb:cc:aa:bb:cc', None, None)]
+        empty_mac = "00:00:00:00:00:00"
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth1", "address"), empty_mac)
+        write_file(os.path.join(self.sysdir, "eth1", "addr_assign_type"), "0")
+        write_file(os.path.join(self.sysdir, "eth2", "addr_assign_type"), "0")
+        write_file(os.path.join(self.sysdir, "eth2", "address"), mac)
+        expected = [("eth2", "aa:bb:cc:aa:bb:cc", None, None)]
         self.assertEqual(expected, net.get_interfaces())
 
     def test_get_interfaces_by_mac_skips_missing_mac(self):
         """Ignore interfaces without an address from get_interfaces_by_mac."""
-        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '0')
-        address_path = os.path.join(self.sysdir, 'eth1', 'address')
+        write_file(os.path.join(self.sysdir, "eth1", "addr_assign_type"), "0")
+        address_path = os.path.join(self.sysdir, "eth1", "address")
         self.assertFalse(os.path.exists(address_path))
-        mac = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth2', 'addr_assign_type'), '0')
-        write_file(os.path.join(self.sysdir, 'eth2', 'address'), mac)
-        expected = [('eth2', 'aa:bb:cc:aa:bb:cc', None, None)]
+        mac = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth2", "addr_assign_type"), "0")
+        write_file(os.path.join(self.sysdir, "eth2", "address"), mac)
+        expected = [("eth2", "aa:bb:cc:aa:bb:cc", None, None)]
         self.assertEqual(expected, net.get_interfaces())
 
     def test_get_interfaces_by_mac_skips_master_devs(self):
         """Ignore interfaces with a master device which would have dup mac."""
-        mac1 = mac2 = 'aa:bb:cc:aa:bb:cc'
-        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '0')
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), mac1)
-        write_file(os.path.join(self.sysdir, 'eth1', 'master'), "blah")
-        write_file(os.path.join(self.sysdir, 'eth2', 'addr_assign_type'), '0')
-        write_file(os.path.join(self.sysdir, 'eth2', 'address'), mac2)
-        expected = [('eth2', mac2, None, None)]
+        mac1 = mac2 = "aa:bb:cc:aa:bb:cc"
+        write_file(os.path.join(self.sysdir, "eth1", "addr_assign_type"), "0")
+        write_file(os.path.join(self.sysdir, "eth1", "address"), mac1)
+        write_file(os.path.join(self.sysdir, "eth1", "master"), "blah")
+        write_file(os.path.join(self.sysdir, "eth2", "addr_assign_type"), "0")
+        write_file(os.path.join(self.sysdir, "eth2", "address"), mac2)
+        expected = [("eth2", mac2, None, None)]
         self.assertEqual(expected, net.get_interfaces())
 
-    @mock.patch('cloudinit.net.is_netfailover')
+    @mock.patch("cloudinit.net.is_netfailover")
     def test_get_interfaces_by_mac_skips_netfailvoer(self, m_netfail):
         """Ignore interfaces if netfailover primary or standby."""
-        mac = 'aa:bb:cc:aa:bb:cc'  # netfailover devs share the same mac
-        for iface in ['ens3', 'ens3sby', 'enP0s1f3']:
+        mac = "aa:bb:cc:aa:bb:cc"  # netfailover devs share the same mac
+        for iface in ["ens3", "ens3sby", "enP0s1f3"]:
             write_file(
-                os.path.join(self.sysdir, iface, 'addr_assign_type'), '0')
-            write_file(
-                os.path.join(self.sysdir, iface, 'address'), mac)
+                os.path.join(self.sysdir, iface, "addr_assign_type"), "0"
+            )
+            write_file(os.path.join(self.sysdir, iface, "address"), mac)
 
         def is_netfail(iface, _driver=None):
             # ens3 is the master
-            if iface == 'ens3':
+            if iface == "ens3":
                 return False
             else:
                 return True
+
         m_netfail.side_effect = is_netfail
-        expected = [('ens3', mac, None, None)]
+        expected = [("ens3", mac, None, None)]
         self.assertEqual(expected, net.get_interfaces())
 
     def test_get_interfaces_does_not_skip_phys_members_of_bridges_and_bonds(
-        self
+        self,
     ):
-        bridge_mac = 'aa:bb:cc:aa:bb:cc'
-        bond_mac = 'cc:bb:aa:cc:bb:aa'
-        ovs_mac = 'bb:cc:aa:bb:cc:aa'
+        bridge_mac = "aa:bb:cc:aa:bb:cc"
+        bond_mac = "cc:bb:aa:cc:bb:aa"
+        ovs_mac = "bb:cc:aa:bb:cc:aa"
 
-        write_file(os.path.join(self.sysdir, 'br0', 'address'), bridge_mac)
-        write_file(os.path.join(self.sysdir, 'br0', 'bridge'), '')
+        write_file(os.path.join(self.sysdir, "br0", "address"), bridge_mac)
+        write_file(os.path.join(self.sysdir, "br0", "bridge"), "")
 
-        write_file(os.path.join(self.sysdir, 'bond0', 'address'), bond_mac)
-        write_file(os.path.join(self.sysdir, 'bond0', 'bonding'), '')
+        write_file(os.path.join(self.sysdir, "bond0", "address"), bond_mac)
+        write_file(os.path.join(self.sysdir, "bond0", "bonding"), "")
 
-        write_file(os.path.join(self.sysdir, 'ovs-system', 'address'),
-                   ovs_mac)
+        write_file(os.path.join(self.sysdir, "ovs-system", "address"), ovs_mac)
 
-        write_file(os.path.join(self.sysdir, 'eth1', 'address'), bridge_mac)
-        os.symlink('../br0', os.path.join(self.sysdir, 'eth1', 'master'))
+        write_file(os.path.join(self.sysdir, "eth1", "address"), bridge_mac)
+        os.symlink("../br0", os.path.join(self.sysdir, "eth1", "master"))
 
-        write_file(os.path.join(self.sysdir, 'eth2', 'address'), bond_mac)
-        os.symlink('../bond0', os.path.join(self.sysdir, 'eth2', 'master'))
+        write_file(os.path.join(self.sysdir, "eth2", "address"), bond_mac)
+        os.symlink("../bond0", os.path.join(self.sysdir, "eth2", "master"))
 
-        write_file(os.path.join(self.sysdir, 'eth3', 'address'), ovs_mac)
-        os.symlink('../ovs-system', os.path.join(self.sysdir, 'eth3',
-                   'master'))
-        os.symlink('../ovs-system', os.path.join(self.sysdir, 'eth3',
-                   'upper_ovs-system'))
+        write_file(os.path.join(self.sysdir, "eth3", "address"), ovs_mac)
+        os.symlink(
+            "../ovs-system", os.path.join(self.sysdir, "eth3", "master")
+        )
+        os.symlink(
+            "../ovs-system",
+            os.path.join(self.sysdir, "eth3", "upper_ovs-system"),
+        )
 
         interface_names = [interface[0] for interface in net.get_interfaces()]
-        self.assertEqual(['eth1', 'eth2', 'eth3', 'ovs-system'],
-                         sorted(interface_names))
+        self.assertEqual(
+            ["eth1", "eth2", "eth3", "ovs-system"], sorted(interface_names)
+        )
 
 
 class TestInterfaceHasOwnMAC(CiTestCase):
-
     def setUp(self):
         super(TestInterfaceHasOwnMAC, self).setUp()
-        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
+        sys_mock = mock.patch("cloudinit.net.get_sys_class_path")
         self.m_sys_path = sys_mock.start()
-        self.sysdir = self.tmp_dir() + '/'
+        self.sysdir = self.tmp_dir() + "/"
         self.m_sys_path.return_value = self.sysdir
         self.addCleanup(sys_mock.stop)
 
     def test_interface_has_own_mac_false_when_stolen(self):
         """Return False from interface_has_own_mac when address is stolen."""
-        write_file(os.path.join(self.sysdir, 'eth1', 'addr_assign_type'), '2')
-        self.assertFalse(net.interface_has_own_mac('eth1'))
+        write_file(os.path.join(self.sysdir, "eth1", "addr_assign_type"), "2")
+        self.assertFalse(net.interface_has_own_mac("eth1"))
 
     def test_interface_has_own_mac_true_when_not_stolen(self):
         """Return False from interface_has_own_mac when mac isn't stolen."""
-        valid_assign_types = ['0', '1', '3']
-        assign_path = os.path.join(self.sysdir, 'eth1', 'addr_assign_type')
+        valid_assign_types = ["0", "1", "3"]
+        assign_path = os.path.join(self.sysdir, "eth1", "addr_assign_type")
         for _type in valid_assign_types:
             write_file(assign_path, _type)
-            self.assertTrue(net.interface_has_own_mac('eth1'))
+            self.assertTrue(net.interface_has_own_mac("eth1"))
 
     def test_interface_has_own_mac_strict_errors_on_absent_assign_type(self):
         """When addr_assign_type is absent, interface_has_own_mac errors."""
         with self.assertRaises(ValueError):
-            net.interface_has_own_mac('eth1', strict=True)
+            net.interface_has_own_mac("eth1", strict=True)
 
 
-@mock.patch('cloudinit.net.subp.subp')
+@mock.patch("cloudinit.net.subp.subp")
 class TestEphemeralIPV4Network(CiTestCase):
 
     with_logs = True
 
     def setUp(self):
         super(TestEphemeralIPV4Network, self).setUp()
-        sys_mock = mock.patch('cloudinit.net.get_sys_class_path')
+        sys_mock = mock.patch("cloudinit.net.get_sys_class_path")
         self.m_sys_path = sys_mock.start()
-        self.sysdir = self.tmp_dir() + '/'
+        self.sysdir = self.tmp_dir() + "/"
         self.m_sys_path.return_value = self.sysdir
         self.addCleanup(sys_mock.stop)
 
     def test_ephemeral_ipv4_network_errors_on_missing_params(self, m_subp):
         """No required params for EphemeralIPv4Network can be None."""
         required_params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255'}
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "prefix_or_mask": "255.255.255.0",
+            "broadcast": "192.168.2.255",
+        }
         for key in required_params.keys():
             params = copy.deepcopy(required_params)
             params[key] = None
             with self.assertRaises(ValueError) as context_manager:
                 net.EphemeralIPv4Network(**params)
             error = context_manager.exception
-            self.assertIn('Cannot init network on', str(error))
+            self.assertIn("Cannot init network on", str(error))
             self.assertEqual(0, m_subp.call_count)
 
     def test_ephemeral_ipv4_network_errors_invalid_mask_prefix(self, m_subp):
         """Raise an error when prefix_or_mask is not a netmask or prefix."""
         params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'broadcast': '192.168.2.255'}
-        invalid_masks = ('invalid', 'invalid.', '123.123.123')
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "broadcast": "192.168.2.255",
+        }
+        invalid_masks = ("invalid", "invalid.", "123.123.123")
         for error_val in invalid_masks:
-            params['prefix_or_mask'] = error_val
+            params["prefix_or_mask"] = error_val
             with self.assertRaises(ValueError) as context_manager:
                 with net.EphemeralIPv4Network(**params):
                     pass
             error = context_manager.exception
-            self.assertIn('Cannot setup network: netmask', str(error))
+            self.assertIn("Cannot setup network: netmask", str(error))
             self.assertEqual(0, m_subp.call_count)
 
     def test_ephemeral_ipv4_network_performs_teardown(self, m_subp):
         """EphemeralIPv4Network performs teardown on the device if setup."""
         expected_setup_calls = [
             mock.call(
-                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
-                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
-                capture=True, update_env={'LANG': 'C'}),
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "add",
+                    "192.168.2.2/24",
+                    "broadcast",
+                    "192.168.2.255",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+                update_env={"LANG": "C"},
+            ),
             mock.call(
-                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0', 'up'],
-                capture=True)]
+                ["ip", "-family", "inet", "link", "set", "dev", "eth0", "up"],
+                capture=True,
+            ),
+        ]
         expected_teardown_calls = [
             mock.call(
-                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0',
-                 'down'], capture=True),
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "link",
+                    "set",
+                    "dev",
+                    "eth0",
+                    "down",
+                ],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-family', 'inet', 'addr', 'del', '192.168.2.2/24',
-                 'dev', 'eth0'], capture=True)]
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "del",
+                    "192.168.2.2/24",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
+        ]
         params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255'}
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "prefix_or_mask": "255.255.255.0",
+            "broadcast": "192.168.2.255",
+        }
         with net.EphemeralIPv4Network(**params):
             self.assertEqual(expected_setup_calls, m_subp.call_args_list)
         m_subp.assert_has_calls(expected_teardown_calls)
 
-    @mock.patch('cloudinit.net.readurl')
+    @mock.patch("cloudinit.net.readurl")
     def test_ephemeral_ipv4_no_network_if_url_connectivity(
-            self, m_readurl, m_subp):
+        self, m_readurl, m_subp
+    ):
         """No network setup is performed if we can successfully connect to
         connectivity_url."""
         params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255',
-            'connectivity_url_data': {'url': 'http://example.org/index.html'}
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "prefix_or_mask": "255.255.255.0",
+            "broadcast": "192.168.2.255",
+            "connectivity_url_data": {"url": "http://example.org/index.html"},
         }
 
         with net.EphemeralIPv4Network(**params):
             self.assertEqual(
-                [mock.call(url='http://example.org/index.html', timeout=5)],
-                m_readurl.call_args_list
+                [mock.call(url="http://example.org/index.html", timeout=5)],
+                m_readurl.call_args_list,
             )
         # Ensure that no teardown happens:
         m_subp.assert_has_calls([])
@@ -639,67 +722,173 @@ class TestEphemeralIPV4Network(CiTestCase):
         It performs no cleanup as the interface was already setup.
         """
         params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255'}
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "prefix_or_mask": "255.255.255.0",
+            "broadcast": "192.168.2.255",
+        }
         m_subp.side_effect = ProcessExecutionError(
-            '', 'RTNETLINK answers: File exists', 2)
+            "", "RTNETLINK answers: File exists", 2
+        )
         expected_calls = [
             mock.call(
-                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
-                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
-                capture=True, update_env={'LANG': 'C'})]
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "add",
+                    "192.168.2.2/24",
+                    "broadcast",
+                    "192.168.2.255",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+                update_env={"LANG": "C"},
+            )
+        ]
         with net.EphemeralIPv4Network(**params):
             pass
         self.assertEqual(expected_calls, m_subp.call_args_list)
         self.assertIn(
-            'Skip ephemeral network setup, eth0 already has address',
-            self.logs.getvalue())
+            "Skip ephemeral network setup, eth0 already has address",
+            self.logs.getvalue(),
+        )
 
     def test_ephemeral_ipv4_network_with_prefix(self, m_subp):
         """EphemeralIPv4Network takes a valid prefix to setup the network."""
         params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'prefix_or_mask': '24', 'broadcast': '192.168.2.255'}
-        for prefix_val in ['24', 16]:  # prefix can be int or string
-            params['prefix_or_mask'] = prefix_val
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "prefix_or_mask": "24",
+            "broadcast": "192.168.2.255",
+        }
+        for prefix_val in ["24", 16]:  # prefix can be int or string
+            params["prefix_or_mask"] = prefix_val
             with net.EphemeralIPv4Network(**params):
                 pass
-        m_subp.assert_has_calls([mock.call(
-            ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
-             'broadcast', '192.168.2.255', 'dev', 'eth0'],
-            capture=True, update_env={'LANG': 'C'})])
-        m_subp.assert_has_calls([mock.call(
-            ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/16',
-             'broadcast', '192.168.2.255', 'dev', 'eth0'],
-            capture=True, update_env={'LANG': 'C'})])
+        m_subp.assert_has_calls(
+            [
+                mock.call(
+                    [
+                        "ip",
+                        "-family",
+                        "inet",
+                        "addr",
+                        "add",
+                        "192.168.2.2/24",
+                        "broadcast",
+                        "192.168.2.255",
+                        "dev",
+                        "eth0",
+                    ],
+                    capture=True,
+                    update_env={"LANG": "C"},
+                )
+            ]
+        )
+        m_subp.assert_has_calls(
+            [
+                mock.call(
+                    [
+                        "ip",
+                        "-family",
+                        "inet",
+                        "addr",
+                        "add",
+                        "192.168.2.2/16",
+                        "broadcast",
+                        "192.168.2.255",
+                        "dev",
+                        "eth0",
+                    ],
+                    capture=True,
+                    update_env={"LANG": "C"},
+                )
+            ]
+        )
 
     def test_ephemeral_ipv4_network_with_new_default_route(self, m_subp):
         """Add the route when router is set and no default route exists."""
         params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'prefix_or_mask': '255.255.255.0', 'broadcast': '192.168.2.255',
-            'router': '192.168.2.1'}
-        m_subp.return_value = '', ''  # Empty response from ip route gw check
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "prefix_or_mask": "255.255.255.0",
+            "broadcast": "192.168.2.255",
+            "router": "192.168.2.1",
+        }
+        m_subp.return_value = "", ""  # Empty response from ip route gw check
         expected_setup_calls = [
             mock.call(
-                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/24',
-                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
-                capture=True, update_env={'LANG': 'C'}),
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "add",
+                    "192.168.2.2/24",
+                    "broadcast",
+                    "192.168.2.255",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+                update_env={"LANG": "C"},
+            ),
             mock.call(
-                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0', 'up'],
-                capture=True),
+                ["ip", "-family", "inet", "link", "set", "dev", "eth0", "up"],
+                capture=True,
+            ),
+            mock.call(["ip", "route", "show", "0.0.0.0/0"], capture=True),
             mock.call(
-                ['ip', 'route', 'show', '0.0.0.0/0'], capture=True),
-            mock.call(['ip', '-4', 'route', 'add', '192.168.2.1',
-                       'dev', 'eth0', 'src', '192.168.2.2'], capture=True),
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "add",
+                    "192.168.2.1",
+                    "dev",
+                    "eth0",
+                    "src",
+                    "192.168.2.2",
+                ],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-4', 'route', 'add', 'default', 'via',
-                 '192.168.2.1', 'dev', 'eth0'], capture=True)]
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "add",
+                    "default",
+                    "via",
+                    "192.168.2.1",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
+        ]
         expected_teardown_calls = [
-            mock.call(['ip', '-4', 'route', 'del', 'default', 'dev', 'eth0'],
-                      capture=True),
-            mock.call(['ip', '-4', 'route', 'del', '192.168.2.1',
-                       'dev', 'eth0', 'src', '192.168.2.2'], capture=True),
+            mock.call(
+                ["ip", "-4", "route", "del", "default", "dev", "eth0"],
+                capture=True,
+            ),
+            mock.call(
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "del",
+                    "192.168.2.1",
+                    "dev",
+                    "eth0",
+                    "src",
+                    "192.168.2.2",
+                ],
+                capture=True,
+            ),
         ]
 
         with net.EphemeralIPv4Network(**params):
@@ -708,45 +897,138 @@ class TestEphemeralIPV4Network(CiTestCase):
 
     def test_ephemeral_ipv4_network_with_rfc3442_static_routes(self, m_subp):
         params = {
-            'interface': 'eth0', 'ip': '192.168.2.2',
-            'prefix_or_mask': '255.255.255.255', 'broadcast': '192.168.2.255',
-            'static_routes': [('192.168.2.1/32', '0.0.0.0'),
-                              ('169.254.169.254/32', '192.168.2.1'),
-                              ('0.0.0.0/0', '192.168.2.1')],
-            'router': '192.168.2.1'}
+            "interface": "eth0",
+            "ip": "192.168.2.2",
+            "prefix_or_mask": "255.255.255.255",
+            "broadcast": "192.168.2.255",
+            "static_routes": [
+                ("192.168.2.1/32", "0.0.0.0"),
+                ("169.254.169.254/32", "192.168.2.1"),
+                ("0.0.0.0/0", "192.168.2.1"),
+            ],
+            "router": "192.168.2.1",
+        }
         expected_setup_calls = [
             mock.call(
-                ['ip', '-family', 'inet', 'addr', 'add', '192.168.2.2/32',
-                 'broadcast', '192.168.2.255', 'dev', 'eth0'],
-                capture=True, update_env={'LANG': 'C'}),
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "add",
+                    "192.168.2.2/32",
+                    "broadcast",
+                    "192.168.2.255",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+                update_env={"LANG": "C"},
+            ),
             mock.call(
-                ['ip', '-family', 'inet', 'link', 'set', 'dev', 'eth0', 'up'],
-                capture=True),
+                ["ip", "-family", "inet", "link", "set", "dev", "eth0", "up"],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-4', 'route', 'append', '192.168.2.1/32',
-                 'dev', 'eth0'], capture=True),
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "append",
+                    "192.168.2.1/32",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-4', 'route', 'append', '169.254.169.254/32',
-                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True),
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "append",
+                    "169.254.169.254/32",
+                    "via",
+                    "192.168.2.1",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-4', 'route', 'append', '0.0.0.0/0',
-                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True)]
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "append",
+                    "0.0.0.0/0",
+                    "via",
+                    "192.168.2.1",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
+        ]
         expected_teardown_calls = [
             mock.call(
-                ['ip', '-4', 'route', 'del', '0.0.0.0/0',
-                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True),
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "del",
+                    "0.0.0.0/0",
+                    "via",
+                    "192.168.2.1",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-4', 'route', 'del', '169.254.169.254/32',
-                 'via', '192.168.2.1', 'dev', 'eth0'], capture=True),
+                [
+                    "ip",
+                    "-4",
+                    "route",
+                    "del",
+                    "169.254.169.254/32",
+                    "via",
+                    "192.168.2.1",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-4', 'route', 'del', '192.168.2.1/32',
-                 'dev', 'eth0'], capture=True),
+                ["ip", "-4", "route", "del", "192.168.2.1/32", "dev", "eth0"],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-family', 'inet', 'link', 'set', 'dev',
-                 'eth0', 'down'], capture=True),
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "link",
+                    "set",
+                    "dev",
+                    "eth0",
+                    "down",
+                ],
+                capture=True,
+            ),
             mock.call(
-                ['ip', '-family', 'inet', 'addr', 'del',
-                 '192.168.2.2/32', 'dev', 'eth0'], capture=True)
+                [
+                    "ip",
+                    "-family",
+                    "inet",
+                    "addr",
+                    "del",
+                    "192.168.2.2/32",
+                    "dev",
+                    "eth0",
+                ],
+                capture=True,
+            ),
         ]
         with net.EphemeralIPv4Network(**params):
             self.assertEqual(expected_setup_calls, m_subp.call_args_list)
@@ -754,7 +1036,8 @@ class TestEphemeralIPV4Network(CiTestCase):
 
 
 class TestApplyNetworkCfgNames(CiTestCase):
-    V1_CONFIG = textwrap.dedent("""\
+    V1_CONFIG = textwrap.dedent(
+        """\
         version: 1
         config:
             - type: physical
@@ -765,8 +1048,10 @@ class TestApplyNetworkCfgNames(CiTestCase):
                     address: 10.0.2.15
                     netmask: 255.255.255.0
                     gateway: 10.0.2.2
-    """)
-    V2_CONFIG = textwrap.dedent("""\
+    """
+    )
+    V2_CONFIG = textwrap.dedent(
+        """\
       version: 2
       ethernets:
           interface0:
@@ -776,9 +1061,11 @@ class TestApplyNetworkCfgNames(CiTestCase):
               - 10.0.2.15/24
             gateway4: 10.0.2.2
             set-name: interface0
-    """)
+    """
+    )
 
-    V2_CONFIG_NO_SETNAME = textwrap.dedent("""\
+    V2_CONFIG_NO_SETNAME = textwrap.dedent(
+        """\
       version: 2
       ethernets:
           interface0:
@@ -787,9 +1074,11 @@ class TestApplyNetworkCfgNames(CiTestCase):
             addresses:
               - 10.0.2.15/24
             gateway4: 10.0.2.2
-    """)
+    """
+    )
 
-    V2_CONFIG_NO_MAC = textwrap.dedent("""\
+    V2_CONFIG_NO_MAC = textwrap.dedent(
+        """\
       version: 2
       ethernets:
           interface0:
@@ -799,40 +1088,43 @@ class TestApplyNetworkCfgNames(CiTestCase):
               - 10.0.2.15/24
             gateway4: 10.0.2.2
             set-name: interface0
-    """)
+    """
+    )
 
-    @mock.patch('cloudinit.net.device_devid')
-    @mock.patch('cloudinit.net.device_driver')
-    @mock.patch('cloudinit.net._rename_interfaces')
-    def test_apply_v1_renames(self, m_rename_interfaces, m_device_driver,
-                              m_device_devid):
-        m_device_driver.return_value = 'virtio_net'
-        m_device_devid.return_value = '0x15d8'
+    @mock.patch("cloudinit.net.device_devid")
+    @mock.patch("cloudinit.net.device_driver")
+    @mock.patch("cloudinit.net._rename_interfaces")
+    def test_apply_v1_renames(
+        self, m_rename_interfaces, m_device_driver, m_device_devid
+    ):
+        m_device_driver.return_value = "virtio_net"
+        m_device_devid.return_value = "0x15d8"
 
         net.apply_network_config_names(yaml.load(self.V1_CONFIG))
 
-        call = ['52:54:00:12:34:00', 'interface0', 'virtio_net', '0x15d8']
+        call = ["52:54:00:12:34:00", "interface0", "virtio_net", "0x15d8"]
         m_rename_interfaces.assert_called_with([call])
 
-    @mock.patch('cloudinit.net.device_devid')
-    @mock.patch('cloudinit.net.device_driver')
-    @mock.patch('cloudinit.net._rename_interfaces')
-    def test_apply_v2_renames(self, m_rename_interfaces, m_device_driver,
-                              m_device_devid):
-        m_device_driver.return_value = 'virtio_net'
-        m_device_devid.return_value = '0x15d8'
+    @mock.patch("cloudinit.net.device_devid")
+    @mock.patch("cloudinit.net.device_driver")
+    @mock.patch("cloudinit.net._rename_interfaces")
+    def test_apply_v2_renames(
+        self, m_rename_interfaces, m_device_driver, m_device_devid
+    ):
+        m_device_driver.return_value = "virtio_net"
+        m_device_devid.return_value = "0x15d8"
 
         net.apply_network_config_names(yaml.load(self.V2_CONFIG))
 
-        call = ['52:54:00:12:34:00', 'interface0', 'virtio_net', '0x15d8']
+        call = ["52:54:00:12:34:00", "interface0", "virtio_net", "0x15d8"]
         m_rename_interfaces.assert_called_with([call])
 
-    @mock.patch('cloudinit.net._rename_interfaces')
+    @mock.patch("cloudinit.net._rename_interfaces")
     def test_apply_v2_renames_skips_without_setname(self, m_rename_interfaces):
         net.apply_network_config_names(yaml.load(self.V2_CONFIG_NO_SETNAME))
         m_rename_interfaces.assert_called_with([])
 
-    @mock.patch('cloudinit.net._rename_interfaces')
+    @mock.patch("cloudinit.net._rename_interfaces")
     def test_apply_v2_renames_skips_without_mac(self, m_rename_interfaces):
         net.apply_network_config_names(yaml.load(self.V2_CONFIG_NO_MAC))
         m_rename_interfaces.assert_called_with([])
@@ -843,184 +1135,191 @@ class TestApplyNetworkCfgNames(CiTestCase):
 
 
 class TestHasURLConnectivity(HttprettyTestCase):
-
     def setUp(self):
         super(TestHasURLConnectivity, self).setUp()
-        self.url = 'http://fake/'
-        self.kwargs = {'allow_redirects': True, 'timeout': 5.0}
+        self.url = "http://fake/"
+        self.kwargs = {"allow_redirects": True, "timeout": 5.0}
 
-    @mock.patch('cloudinit.net.readurl')
+    @mock.patch("cloudinit.net.readurl")
     def test_url_timeout_on_connectivity_check(self, m_readurl):
         """A timeout of 5 seconds is provided when reading a url."""
         self.assertTrue(
-            net.has_url_connectivity({'url': self.url}),
-            'Expected True on url connect')
+            net.has_url_connectivity({"url": self.url}),
+            "Expected True on url connect",
+        )
 
     def test_true_on_url_connectivity_success(self):
         httpretty.register_uri(httpretty.GET, self.url)
         self.assertTrue(
-            net.has_url_connectivity({'url': self.url}),
-            'Expected True on url connect')
+            net.has_url_connectivity({"url": self.url}),
+            "Expected True on url connect",
+        )
 
-    @mock.patch('requests.Session.request')
+    @mock.patch("requests.Session.request")
     def test_true_on_url_connectivity_timeout(self, m_request):
         """A timeout raised accessing the url will return False."""
-        m_request.side_effect = requests.Timeout('Fake Connection Timeout')
+        m_request.side_effect = requests.Timeout("Fake Connection Timeout")
         self.assertFalse(
-            net.has_url_connectivity({'url': self.url}),
-            'Expected False on url timeout')
+            net.has_url_connectivity({"url": self.url}),
+            "Expected False on url timeout",
+        )
 
     def test_true_on_url_connectivity_failure(self):
         httpretty.register_uri(httpretty.GET, self.url, body={}, status=404)
         self.assertFalse(
-            net.has_url_connectivity({'url': self.url}),
-            'Expected False on url fail')
+            net.has_url_connectivity({"url": self.url}),
+            "Expected False on url fail",
+        )
 
 
 def _mk_v1_phys(mac, name, driver, device_id):
-    v1_cfg = {'type': 'physical', 'name': name, 'mac_address': mac}
+    v1_cfg = {"type": "physical", "name": name, "mac_address": mac}
     params = {}
     if driver:
-        params.update({'driver': driver})
+        params.update({"driver": driver})
     if device_id:
-        params.update({'device_id': device_id})
+        params.update({"device_id": device_id})
 
     if params:
-        v1_cfg.update({'params': params})
+        v1_cfg.update({"params": params})
 
     return v1_cfg
 
 
 def _mk_v2_phys(mac, name, driver=None, device_id=None):
-    v2_cfg = {'set-name': name, 'match': {'macaddress': mac}}
+    v2_cfg = {"set-name": name, "match": {"macaddress": mac}}
     if driver:
-        v2_cfg['match'].update({'driver': driver})
+        v2_cfg["match"].update({"driver": driver})
     if device_id:
-        v2_cfg['match'].update({'device_id': device_id})
+        v2_cfg["match"].update({"device_id": device_id})
 
     return v2_cfg
 
 
 class TestExtractPhysdevs(CiTestCase):
-
     def setUp(self):
         super(TestExtractPhysdevs, self).setUp()
-        self.add_patch('cloudinit.net.device_driver', 'm_driver')
-        self.add_patch('cloudinit.net.device_devid', 'm_devid')
+        self.add_patch("cloudinit.net.device_driver", "m_driver")
+        self.add_patch("cloudinit.net.device_devid", "m_devid")
 
     def test_extract_physdevs_looks_up_driver_v1(self):
-        driver = 'virtio'
+        driver = "virtio"
         self.m_driver.return_value = driver
         physdevs = [
-            ['aa:bb:cc:dd:ee:ff', 'eth0', None, '0x1000'],
+            ["aa:bb:cc:dd:ee:ff", "eth0", None, "0x1000"],
         ]
         netcfg = {
-            'version': 1,
-            'config': [_mk_v1_phys(*args) for args in physdevs],
+            "version": 1,
+            "config": [_mk_v1_phys(*args) for args in physdevs],
         }
         # insert the driver value for verification
         physdevs[0][2] = driver
-        self.assertEqual(sorted(physdevs),
-                         sorted(net.extract_physdevs(netcfg)))
-        self.m_driver.assert_called_with('eth0')
+        self.assertEqual(
+            sorted(physdevs), sorted(net.extract_physdevs(netcfg))
+        )
+        self.m_driver.assert_called_with("eth0")
 
     def test_extract_physdevs_looks_up_driver_v2(self):
-        driver = 'virtio'
+        driver = "virtio"
         self.m_driver.return_value = driver
         physdevs = [
-            ['aa:bb:cc:dd:ee:ff', 'eth0', None, '0x1000'],
+            ["aa:bb:cc:dd:ee:ff", "eth0", None, "0x1000"],
         ]
         netcfg = {
-            'version': 2,
-            'ethernets': {args[1]: _mk_v2_phys(*args) for args in physdevs},
+            "version": 2,
+            "ethernets": {args[1]: _mk_v2_phys(*args) for args in physdevs},
         }
         # insert the driver value for verification
         physdevs[0][2] = driver
-        self.assertEqual(sorted(physdevs),
-                         sorted(net.extract_physdevs(netcfg)))
-        self.m_driver.assert_called_with('eth0')
+        self.assertEqual(
+            sorted(physdevs), sorted(net.extract_physdevs(netcfg))
+        )
+        self.m_driver.assert_called_with("eth0")
 
     def test_extract_physdevs_looks_up_devid_v1(self):
-        devid = '0x1000'
+        devid = "0x1000"
         self.m_devid.return_value = devid
         physdevs = [
-            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', None],
+            ["aa:bb:cc:dd:ee:ff", "eth0", "virtio", None],
         ]
         netcfg = {
-            'version': 1,
-            'config': [_mk_v1_phys(*args) for args in physdevs],
+            "version": 1,
+            "config": [_mk_v1_phys(*args) for args in physdevs],
         }
         # insert the driver value for verification
         physdevs[0][3] = devid
-        self.assertEqual(sorted(physdevs),
-                         sorted(net.extract_physdevs(netcfg)))
-        self.m_devid.assert_called_with('eth0')
+        self.assertEqual(
+            sorted(physdevs), sorted(net.extract_physdevs(netcfg))
+        )
+        self.m_devid.assert_called_with("eth0")
 
     def test_extract_physdevs_looks_up_devid_v2(self):
-        devid = '0x1000'
+        devid = "0x1000"
         self.m_devid.return_value = devid
         physdevs = [
-            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', None],
+            ["aa:bb:cc:dd:ee:ff", "eth0", "virtio", None],
         ]
         netcfg = {
-            'version': 2,
-            'ethernets': {args[1]: _mk_v2_phys(*args) for args in physdevs},
+            "version": 2,
+            "ethernets": {args[1]: _mk_v2_phys(*args) for args in physdevs},
         }
         # insert the driver value for verification
         physdevs[0][3] = devid
-        self.assertEqual(sorted(physdevs),
-                         sorted(net.extract_physdevs(netcfg)))
-        self.m_devid.assert_called_with('eth0')
+        self.assertEqual(
+            sorted(physdevs), sorted(net.extract_physdevs(netcfg))
+        )
+        self.m_devid.assert_called_with("eth0")
 
     def test_get_v1_type_physical(self):
         physdevs = [
-            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
-            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
-            ['09:87:65:43:21:10', 'ens0p1', 'mlx4_core', '0:0:1000'],
+            ["aa:bb:cc:dd:ee:ff", "eth0", "virtio", "0x1000"],
+            ["00:11:22:33:44:55", "ens3", "e1000", "0x1643"],
+            ["09:87:65:43:21:10", "ens0p1", "mlx4_core", "0:0:1000"],
         ]
         netcfg = {
-            'version': 1,
-            'config': [_mk_v1_phys(*args) for args in physdevs],
+            "version": 1,
+            "config": [_mk_v1_phys(*args) for args in physdevs],
         }
-        self.assertEqual(sorted(physdevs),
-                         sorted(net.extract_physdevs(netcfg)))
+        self.assertEqual(
+            sorted(physdevs), sorted(net.extract_physdevs(netcfg))
+        )
 
     def test_get_v2_type_physical(self):
         physdevs = [
-            ['aa:bb:cc:dd:ee:ff', 'eth0', 'virtio', '0x1000'],
-            ['00:11:22:33:44:55', 'ens3', 'e1000', '0x1643'],
-            ['09:87:65:43:21:10', 'ens0p1', 'mlx4_core', '0:0:1000'],
+            ["aa:bb:cc:dd:ee:ff", "eth0", "virtio", "0x1000"],
+            ["00:11:22:33:44:55", "ens3", "e1000", "0x1643"],
+            ["09:87:65:43:21:10", "ens0p1", "mlx4_core", "0:0:1000"],
         ]
         netcfg = {
-            'version': 2,
-            'ethernets': {args[1]: _mk_v2_phys(*args) for args in physdevs},
+            "version": 2,
+            "ethernets": {args[1]: _mk_v2_phys(*args) for args in physdevs},
         }
-        self.assertEqual(sorted(physdevs),
-                         sorted(net.extract_physdevs(netcfg)))
+        self.assertEqual(
+            sorted(physdevs), sorted(net.extract_physdevs(netcfg))
+        )
 
     def test_get_v2_type_physical_skips_if_no_set_name(self):
         netcfg = {
-            'version': 2,
-            'ethernets': {
-                'ens3': {
-                    'match': {'macaddress': '00:11:22:33:44:55'},
+            "version": 2,
+            "ethernets": {
+                "ens3": {
+                    "match": {"macaddress": "00:11:22:33:44:55"},
                 }
-            }
+            },
         }
         self.assertEqual([], net.extract_physdevs(netcfg))
 
     def test_runtime_error_on_unknown_netcfg_version(self):
         with self.assertRaises(RuntimeError):
-            net.extract_physdevs({'version': 3, 'awesome_config': []})
+            net.extract_physdevs({"version": 3, "awesome_config": []})
 
 
 class TestNetFailOver(CiTestCase):
-
     def setUp(self):
         super(TestNetFailOver, self).setUp()
-        self.add_patch('cloudinit.net.util', 'm_util')
-        self.add_patch('cloudinit.net.read_sys_net', 'm_read_sys_net')
-        self.add_patch('cloudinit.net.device_driver', 'm_device_driver')
+        self.add_patch("cloudinit.net.util", "m_util")
+        self.add_patch("cloudinit.net.read_sys_net", "m_read_sys_net")
+        self.add_patch("cloudinit.net.device_driver", "m_device_driver")
 
     def test_get_dev_features(self):
         devname = self.random_string()
@@ -1029,192 +1328,210 @@ class TestNetFailOver(CiTestCase):
 
         self.assertEqual(features, net.get_dev_features(devname))
         self.assertEqual(1, self.m_read_sys_net.call_count)
-        self.assertEqual(mock.call(devname, 'device/features'),
-                         self.m_read_sys_net.call_args_list[0])
+        self.assertEqual(
+            mock.call(devname, "device/features"),
+            self.m_read_sys_net.call_args_list[0],
+        )
 
     def test_get_dev_features_none_returns_empty_string(self):
         devname = self.random_string()
-        self.m_read_sys_net.side_effect = Exception('error')
-        self.assertEqual('', net.get_dev_features(devname))
+        self.m_read_sys_net.side_effect = Exception("error")
+        self.assertEqual("", net.get_dev_features(devname))
         self.assertEqual(1, self.m_read_sys_net.call_count)
-        self.assertEqual(mock.call(devname, 'device/features'),
-                         self.m_read_sys_net.call_args_list[0])
+        self.assertEqual(
+            mock.call(devname, "device/features"),
+            self.m_read_sys_net.call_args_list[0],
+        )
 
-    @mock.patch('cloudinit.net.get_dev_features')
+    @mock.patch("cloudinit.net.get_dev_features")
     def test_has_netfail_standby_feature(self, m_dev_features):
         devname = self.random_string()
-        standby_features = ('0' * 62) + '1' + '0'
+        standby_features = ("0" * 62) + "1" + "0"
         m_dev_features.return_value = standby_features
         self.assertTrue(net.has_netfail_standby_feature(devname))
 
-    @mock.patch('cloudinit.net.get_dev_features')
+    @mock.patch("cloudinit.net.get_dev_features")
     def test_has_netfail_standby_feature_short_is_false(self, m_dev_features):
         devname = self.random_string()
         standby_features = self.random_string()
         m_dev_features.return_value = standby_features
         self.assertFalse(net.has_netfail_standby_feature(devname))
 
-    @mock.patch('cloudinit.net.get_dev_features')
-    def test_has_netfail_standby_feature_not_present_is_false(self,
-                                                              m_dev_features):
+    @mock.patch("cloudinit.net.get_dev_features")
+    def test_has_netfail_standby_feature_not_present_is_false(
+        self, m_dev_features
+    ):
         devname = self.random_string()
-        standby_features = '0' * 64
+        standby_features = "0" * 64
         m_dev_features.return_value = standby_features
         self.assertFalse(net.has_netfail_standby_feature(devname))
 
-    @mock.patch('cloudinit.net.get_dev_features')
-    def test_has_netfail_standby_feature_no_features_is_false(self,
-                                                              m_dev_features):
+    @mock.patch("cloudinit.net.get_dev_features")
+    def test_has_netfail_standby_feature_no_features_is_false(
+        self, m_dev_features
+    ):
         devname = self.random_string()
         standby_features = None
         m_dev_features.return_value = standby_features
         self.assertFalse(net.has_netfail_standby_feature(devname))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_master(self, m_exists, m_standby):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         m_exists.return_value = False  # no master sysfs attr
         m_standby.return_value = True  # has standby feature flag
         self.assertTrue(net.is_netfail_master(devname, driver))
 
-    @mock.patch('cloudinit.net.sys_dev_path')
+    @mock.patch("cloudinit.net.sys_dev_path")
     def test_is_netfail_master_checks_master_attr(self, m_sysdev):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         m_sysdev.return_value = self.random_string()
         self.assertFalse(net.is_netfail_master(devname, driver))
         self.assertEqual(1, m_sysdev.call_count)
-        self.assertEqual(mock.call(devname, path='master'),
-                         m_sysdev.call_args_list[0])
+        self.assertEqual(
+            mock.call(devname, path="master"), m_sysdev.call_args_list[0]
+        )
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_master_wrong_driver(self, m_exists, m_standby):
         devname = self.random_string()
         driver = self.random_string()
         self.assertFalse(net.is_netfail_master(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_master_has_master_attr(self, m_exists, m_standby):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         m_exists.return_value = True  # has master sysfs attr
         self.assertFalse(net.is_netfail_master(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_master_no_standby_feat(self, m_exists, m_standby):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         m_exists.return_value = False  # no master sysfs attr
         m_standby.return_value = False  # no standby feature flag
         self.assertFalse(net.is_netfail_master(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
-    @mock.patch('cloudinit.net.sys_dev_path')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
+    @mock.patch("cloudinit.net.sys_dev_path")
     def test_is_netfail_primary(self, m_sysdev, m_exists, m_standby):
         devname = self.random_string()
         driver = self.random_string()  # device not virtio_net
         master_devname = self.random_string()
-        m_sysdev.return_value = "%s/%s" % (self.random_string(),
-                                           master_devname)
+        m_sysdev.return_value = "%s/%s" % (
+            self.random_string(),
+            master_devname,
+        )
         m_exists.return_value = True  # has master sysfs attr
-        self.m_device_driver.return_value = 'virtio_net'  # master virtio_net
+        self.m_device_driver.return_value = "virtio_net"  # master virtio_net
         m_standby.return_value = True  # has standby feature flag
         self.assertTrue(net.is_netfail_primary(devname, driver))
         self.assertEqual(1, self.m_device_driver.call_count)
-        self.assertEqual(mock.call(master_devname),
-                         self.m_device_driver.call_args_list[0])
+        self.assertEqual(
+            mock.call(master_devname), self.m_device_driver.call_args_list[0]
+        )
         self.assertEqual(1, m_standby.call_count)
-        self.assertEqual(mock.call(master_devname),
-                         m_standby.call_args_list[0])
-
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
-    @mock.patch('cloudinit.net.sys_dev_path')
-    def test_is_netfail_primary_wrong_driver(self, m_sysdev, m_exists,
-                                             m_standby):
+        self.assertEqual(
+            mock.call(master_devname), m_standby.call_args_list[0]
+        )
+
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
+    @mock.patch("cloudinit.net.sys_dev_path")
+    def test_is_netfail_primary_wrong_driver(
+        self, m_sysdev, m_exists, m_standby
+    ):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         self.assertFalse(net.is_netfail_primary(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
-    @mock.patch('cloudinit.net.sys_dev_path')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
+    @mock.patch("cloudinit.net.sys_dev_path")
     def test_is_netfail_primary_no_master(self, m_sysdev, m_exists, m_standby):
         devname = self.random_string()
         driver = self.random_string()  # device not virtio_net
         m_exists.return_value = False  # no master sysfs attr
         self.assertFalse(net.is_netfail_primary(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
-    @mock.patch('cloudinit.net.sys_dev_path')
-    def test_is_netfail_primary_bad_master(self, m_sysdev, m_exists,
-                                           m_standby):
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
+    @mock.patch("cloudinit.net.sys_dev_path")
+    def test_is_netfail_primary_bad_master(
+        self, m_sysdev, m_exists, m_standby
+    ):
         devname = self.random_string()
         driver = self.random_string()  # device not virtio_net
         master_devname = self.random_string()
-        m_sysdev.return_value = "%s/%s" % (self.random_string(),
-                                           master_devname)
+        m_sysdev.return_value = "%s/%s" % (
+            self.random_string(),
+            master_devname,
+        )
         m_exists.return_value = True  # has master sysfs attr
-        self.m_device_driver.return_value = 'XXXX'  # master not virtio_net
+        self.m_device_driver.return_value = "XXXX"  # master not virtio_net
         self.assertFalse(net.is_netfail_primary(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
-    @mock.patch('cloudinit.net.sys_dev_path')
-    def test_is_netfail_primary_no_standby(self, m_sysdev, m_exists,
-                                           m_standby):
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
+    @mock.patch("cloudinit.net.sys_dev_path")
+    def test_is_netfail_primary_no_standby(
+        self, m_sysdev, m_exists, m_standby
+    ):
         devname = self.random_string()
         driver = self.random_string()  # device not virtio_net
         master_devname = self.random_string()
-        m_sysdev.return_value = "%s/%s" % (self.random_string(),
-                                           master_devname)
+        m_sysdev.return_value = "%s/%s" % (
+            self.random_string(),
+            master_devname,
+        )
         m_exists.return_value = True  # has master sysfs attr
-        self.m_device_driver.return_value = 'virtio_net'  # master virtio_net
+        self.m_device_driver.return_value = "virtio_net"  # master virtio_net
         m_standby.return_value = False  # master has no standby feature flag
         self.assertFalse(net.is_netfail_primary(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_standby(self, m_exists, m_standby):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         m_exists.return_value = True  # has master sysfs attr
         m_standby.return_value = True  # has standby feature flag
         self.assertTrue(net.is_netfail_standby(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_standby_wrong_driver(self, m_exists, m_standby):
         devname = self.random_string()
         driver = self.random_string()
         self.assertFalse(net.is_netfail_standby(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_standby_no_master(self, m_exists, m_standby):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         m_exists.return_value = False  # has master sysfs attr
         self.assertFalse(net.is_netfail_standby(devname, driver))
 
-    @mock.patch('cloudinit.net.has_netfail_standby_feature')
-    @mock.patch('cloudinit.net.os.path.exists')
+    @mock.patch("cloudinit.net.has_netfail_standby_feature")
+    @mock.patch("cloudinit.net.os.path.exists")
     def test_is_netfail_standby_no_standby_feature(self, m_exists, m_standby):
         devname = self.random_string()
-        driver = 'virtio_net'
+        driver = "virtio_net"
         m_exists.return_value = True  # has master sysfs attr
         m_standby.return_value = False  # has standby feature flag
         self.assertFalse(net.is_netfail_standby(devname, driver))
 
-    @mock.patch('cloudinit.net.is_netfail_standby')
-    @mock.patch('cloudinit.net.is_netfail_primary')
+    @mock.patch("cloudinit.net.is_netfail_standby")
+    @mock.patch("cloudinit.net.is_netfail_primary")
     def test_is_netfailover_primary(self, m_primary, m_standby):
         devname = self.random_string()
         driver = self.random_string()
@@ -1222,8 +1539,8 @@ class TestNetFailOver(CiTestCase):
         m_standby.return_value = False
         self.assertTrue(net.is_netfailover(devname, driver))
 
-    @mock.patch('cloudinit.net.is_netfail_standby')
-    @mock.patch('cloudinit.net.is_netfail_primary')
+    @mock.patch("cloudinit.net.is_netfail_standby")
+    @mock.patch("cloudinit.net.is_netfail_primary")
     def test_is_netfailover_standby(self, m_primary, m_standby):
         devname = self.random_string()
         driver = self.random_string()
@@ -1231,8 +1548,8 @@ class TestNetFailOver(CiTestCase):
         m_standby.return_value = True
         self.assertTrue(net.is_netfailover(devname, driver))
 
-    @mock.patch('cloudinit.net.is_netfail_standby')
-    @mock.patch('cloudinit.net.is_netfail_primary')
+    @mock.patch("cloudinit.net.is_netfail_standby")
+    @mock.patch("cloudinit.net.is_netfail_primary")
     def test_is_netfailover_returns_false(self, m_primary, m_standby):
         devname = self.random_string()
         driver = self.random_string()
@@ -1274,6 +1591,7 @@ class TestGetOVSInternalInterfaces:
     Uses the ``clear_lru_cache`` local autouse fixture to allow us to test
     despite the ``lru_cache`` decorator on the unit under test.
     """
+
     @pytest.fixture(autouse=True)
     def clear_lru_cache(self):
         net.get_ovs_internal_interfaces.cache_clear()
@@ -1364,14 +1682,19 @@ class TestIsIpAddress:
     the ipaddress module correctly.
     """
 
-    @pytest.mark.parametrize('ip_address_side_effect,expected_return', (
-        (ValueError, False),
-        (lambda _: ipaddress.IPv4Address('192.168.0.1'), True),
-        (lambda _: ipaddress.IPv6Address('2001:db8::'), True),
-    ))
+    @pytest.mark.parametrize(
+        "ip_address_side_effect,expected_return",
+        (
+            (ValueError, False),
+            (lambda _: ipaddress.IPv4Address("192.168.0.1"), True),
+            (lambda _: ipaddress.IPv6Address("2001:db8::"), True),
+        ),
+    )
     def test_is_ip_address(self, ip_address_side_effect, expected_return):
-        with mock.patch('cloudinit.net.ipaddress.ip_address',
-                        side_effect=ip_address_side_effect) as m_ip_address:
+        with mock.patch(
+            "cloudinit.net.ipaddress.ip_address",
+            side_effect=ip_address_side_effect,
+        ) as m_ip_address:
             ret = net.is_ip_address(mock.sentinel.ip_address_in)
         assert expected_return == ret
         expected_call = mock.call(mock.sentinel.ip_address_in)
@@ -1386,13 +1709,20 @@ class TestIsIpv4Address:
     the ipaddress module correctly.
     """
 
-    @pytest.mark.parametrize('ipv4address_mock,expected_return', (
-        (mock.Mock(side_effect=ValueError), False),
-        (mock.Mock(return_value=ipaddress.IPv4Address('192.168.0.1')), True),
-    ))
+    @pytest.mark.parametrize(
+        "ipv4address_mock,expected_return",
+        (
+            (mock.Mock(side_effect=ValueError), False),
+            (
+                mock.Mock(return_value=ipaddress.IPv4Address("192.168.0.1")),
+                True,
+            ),
+        ),
+    )
     def test_is_ip_address(self, ipv4address_mock, expected_return):
-        with mock.patch('cloudinit.net.ipaddress.IPv4Address',
-                        ipv4address_mock) as m_ipv4address:
+        with mock.patch(
+            "cloudinit.net.ipaddress.IPv4Address", ipv4address_mock
+        ) as m_ipv4address:
             ret = net.is_ipv4_address(mock.sentinel.ip_address_in)
         assert expected_return == ret
         expected_call = mock.call(mock.sentinel.ip_address_in)
diff --git a/tests/unittests/net/test_network_state.py b/tests/unittests/net/test_network_state.py
index fdcd5296..88da9f94 100644
--- a/tests/unittests/net/test_network_state.py
+++ b/tests/unittests/net/test_network_state.py
@@ -8,7 +8,7 @@ from cloudinit import safeyaml
 from cloudinit.net import network_state
 from tests.unittests.helpers import CiTestCase
 
-netstate_path = 'cloudinit.net.network_state'
+netstate_path = "cloudinit.net.network_state"
 
 
 _V1_CONFIG_NAMESERVERS = """\
@@ -36,8 +36,8 @@ network:
       mac_address: '66:77:88:99:00:11'
 """
 
-V1_CONFIG_NAMESERVERS_VALID = _V1_CONFIG_NAMESERVERS.format(iface='eth1')
-V1_CONFIG_NAMESERVERS_INVALID = _V1_CONFIG_NAMESERVERS.format(iface='eth90')
+V1_CONFIG_NAMESERVERS_VALID = _V1_CONFIG_NAMESERVERS.format(iface="eth1")
+V1_CONFIG_NAMESERVERS_INVALID = _V1_CONFIG_NAMESERVERS.format(iface="eth90")
 
 V2_CONFIG_NAMESERVERS = """\
 network:
@@ -60,11 +60,10 @@ network:
 
 
 class TestNetworkStateParseConfig(CiTestCase):
-
     def setUp(self):
         super(TestNetworkStateParseConfig, self).setUp()
-        nsi_path = netstate_path + '.NetworkStateInterpreter'
-        self.add_patch(nsi_path, 'm_nsi')
+        nsi_path = netstate_path + ".NetworkStateInterpreter"
+        self.add_patch(nsi_path, "m_nsi")
 
     def test_missing_version_returns_none(self):
         ncfg = {}
@@ -72,93 +71,96 @@ class TestNetworkStateParseConfig(CiTestCase):
             network_state.parse_net_config_data(ncfg)
 
     def test_unknown_versions_returns_none(self):
-        ncfg = {'version': 13.2}
+        ncfg = {"version": 13.2}
         with self.assertRaises(RuntimeError):
             network_state.parse_net_config_data(ncfg)
 
     def test_version_2_passes_self_as_config(self):
-        ncfg = {'version': 2, 'otherconfig': {}, 'somemore': [1, 2, 3]}
+        ncfg = {"version": 2, "otherconfig": {}, "somemore": [1, 2, 3]}
         network_state.parse_net_config_data(ncfg)
-        self.assertEqual([mock.call(version=2, config=ncfg)],
-                         self.m_nsi.call_args_list)
+        self.assertEqual(
+            [mock.call(version=2, config=ncfg)], self.m_nsi.call_args_list
+        )
 
     def test_valid_config_gets_network_state(self):
-        ncfg = {'version': 2, 'otherconfig': {}, 'somemore': [1, 2, 3]}
+        ncfg = {"version": 2, "otherconfig": {}, "somemore": [1, 2, 3]}
         result = network_state.parse_net_config_data(ncfg)
         self.assertNotEqual(None, result)
 
     def test_empty_v1_config_gets_network_state(self):
-        ncfg = {'version': 1, 'config': []}
+        ncfg = {"version": 1, "config": []}
         result = network_state.parse_net_config_data(ncfg)
         self.assertNotEqual(None, result)
 
     def test_empty_v2_config_gets_network_state(self):
-        ncfg = {'version': 2}
+        ncfg = {"version": 2}
         result = network_state.parse_net_config_data(ncfg)
         self.assertNotEqual(None, result)
 
 
 class TestNetworkStateParseConfigV2(CiTestCase):
-
     def test_version_2_ignores_renderer_key(self):
-        ncfg = {'version': 2, 'renderer': 'networkd', 'ethernets': {}}
-        nsi = network_state.NetworkStateInterpreter(version=ncfg['version'],
-                                                    config=ncfg)
+        ncfg = {"version": 2, "renderer": "networkd", "ethernets": {}}
+        nsi = network_state.NetworkStateInterpreter(
+            version=ncfg["version"], config=ncfg
+        )
         nsi.parse_config(skip_broken=False)
-        self.assertEqual(ncfg, nsi.as_dict()['config'])
+        self.assertEqual(ncfg, nsi.as_dict()["config"])
 
 
 class TestNetworkStateParseNameservers:
     def _parse_network_state_from_config(self, config):
         yaml = safeyaml.load(config)
-        return network_state.parse_net_config_data(yaml['network'])
+        return network_state.parse_net_config_data(yaml["network"])
 
     def test_v1_nameservers_valid(self):
         config = self._parse_network_state_from_config(
-            V1_CONFIG_NAMESERVERS_VALID)
+            V1_CONFIG_NAMESERVERS_VALID
+        )
 
         # If an interface was specified, DNS shouldn't be in the global list
-        assert ['192.168.1.0', '4.4.4.4'] == sorted(
-            config.dns_nameservers)
-        assert ['eggs.local'] == config.dns_searchdomains
+        assert ["192.168.1.0", "4.4.4.4"] == sorted(config.dns_nameservers)
+        assert ["eggs.local"] == config.dns_searchdomains
 
         # If an interface was specified, DNS should be part of the interface
         for iface in config.iter_interfaces():
-            if iface['name'] == 'eth1':
-                assert iface['dns']['addresses'] == ['192.168.1.1', '8.8.8.8']
-                assert iface['dns']['search'] == ['spam.local']
+            if iface["name"] == "eth1":
+                assert iface["dns"]["addresses"] == ["192.168.1.1", "8.8.8.8"]
+                assert iface["dns"]["search"] == ["spam.local"]
             else:
-                assert 'dns' not in iface
+                assert "dns" not in iface
 
     def test_v1_nameservers_invalid(self):
         with pytest.raises(ValueError):
             self._parse_network_state_from_config(
-                V1_CONFIG_NAMESERVERS_INVALID)
+                V1_CONFIG_NAMESERVERS_INVALID
+            )
 
     def test_v2_nameservers(self):
         config = self._parse_network_state_from_config(V2_CONFIG_NAMESERVERS)
 
         # Ensure DNS defined on interface exists on interface
         for iface in config.iter_interfaces():
-            if iface['name'] == 'eth0':
-                assert iface['dns'] == {
-                    'nameservers': ['8.8.8.8'],
-                    'search': ['spam.local', 'eggs.local'],
+            if iface["name"] == "eth0":
+                assert iface["dns"] == {
+                    "nameservers": ["8.8.8.8"],
+                    "search": ["spam.local", "eggs.local"],
                 }
             else:
-                assert iface['dns'] == {
-                    'nameservers': ['4.4.4.4'],
-                    'search': ['foo.local', 'bar.local']
+                assert iface["dns"] == {
+                    "nameservers": ["4.4.4.4"],
+                    "search": ["foo.local", "bar.local"],
                 }
 
         # Ensure DNS defined on interface also exists globally (since there
         # is no global DNS definitions in v2)
-        assert ['4.4.4.4', '8.8.8.8'] == sorted(config.dns_nameservers)
+        assert ["4.4.4.4", "8.8.8.8"] == sorted(config.dns_nameservers)
         assert [
-            'bar.local',
-            'eggs.local',
-            'foo.local',
-            'spam.local',
+            "bar.local",
+            "eggs.local",
+            "foo.local",
+            "spam.local",
         ] == sorted(config.dns_searchdomains)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/net/test_networkd.py b/tests/unittests/net/test_networkd.py
index 8dc90b48..ec1d04e9 100644
--- a/tests/unittests/net/test_networkd.py
+++ b/tests/unittests/net/test_networkd.py
@@ -1,7 +1,7 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 from cloudinit import safeyaml
-from cloudinit.net import networkd, network_state
+from cloudinit.net import network_state, networkd
 
 V2_CONFIG_SET_NAME = """\
 network:
diff --git a/tests/unittests/runs/test_merge_run.py b/tests/unittests/runs/test_merge_run.py
index 29439c8a..1b1b5595 100644
--- a/tests/unittests/runs/test_merge_run.py
+++ b/tests/unittests/runs/test_merge_run.py
@@ -4,12 +4,9 @@ import os
 import shutil
 import tempfile
 
-from tests.unittests import helpers
-
+from cloudinit import safeyaml, stages, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import safeyaml
-from cloudinit import stages
-from cloudinit import util
+from tests.unittests import helpers
 
 
 class TestMergeRun(helpers.FilesystemMockingTestCase):
@@ -20,17 +17,18 @@ class TestMergeRun(helpers.FilesystemMockingTestCase):
     def test_none_ds(self):
         new_root = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, new_root)
-        self.replicateTestRoot('simple_ubuntu', new_root)
+        self.replicateTestRoot("simple_ubuntu", new_root)
         cfg = {
-            'datasource_list': ['None'],
-            'cloud_init_modules': ['write-files'],
-            'system_info': {'paths': {'run_dir': new_root}}
+            "datasource_list": ["None"],
+            "cloud_init_modules": ["write-files"],
+            "system_info": {"paths": {"run_dir": new_root}},
         }
-        ud = helpers.readResource('user_data.1.txt')
+        ud = helpers.readResource("user_data.1.txt")
         cloud_cfg = safeyaml.dumps(cfg)
-        util.ensure_dir(os.path.join(new_root, 'etc', 'cloud'))
-        util.write_file(os.path.join(new_root, 'etc',
-                                     'cloud', 'cloud.cfg'), cloud_cfg)
+        util.ensure_dir(os.path.join(new_root, "etc", "cloud"))
+        util.write_file(
+            os.path.join(new_root, "etc", "cloud", "cloud.cfg"), cloud_cfg
+        )
         self._patchIn(new_root)
 
         # Now start verifying whats created
@@ -41,20 +39,23 @@ class TestMergeRun(helpers.FilesystemMockingTestCase):
         initer.datasource.userdata_raw = ud
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data',
-                              initer.consume_data,
-                              args=[PER_INSTANCE],
-                              freq=PER_INSTANCE)
-        mirrors = initer.distro.get_option('package_mirrors')
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
+        mirrors = initer.distro.get_option("package_mirrors")
         self.assertEqual(1, len(mirrors))
         mirror = mirrors[0]
-        self.assertEqual(mirror['arches'], ['i386', 'amd64', 'blah'])
+        self.assertEqual(mirror["arches"], ["i386", "amd64", "blah"])
         mods = stages.Modules(initer)
-        (which_ran, failures) = mods.run_section('cloud_init_modules')
+        (which_ran, failures) = mods.run_section("cloud_init_modules")
         self.assertTrue(len(failures) == 0)
-        self.assertTrue(os.path.exists('/etc/blah.ini'))
-        self.assertIn('write-files', which_ran)
-        contents = util.load_file('/etc/blah.ini')
-        self.assertEqual(contents, 'blah')
+        self.assertTrue(os.path.exists("/etc/blah.ini"))
+        self.assertIn("write-files", which_ran)
+        contents = util.load_file("/etc/blah.ini")
+        self.assertEqual(contents, "blah")
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/runs/test_simple_run.py b/tests/unittests/runs/test_simple_run.py
index aa78dda3..38cf9494 100644
--- a/tests/unittests/runs/test_simple_run.py
+++ b/tests/unittests/runs/test_simple_run.py
@@ -3,12 +3,9 @@
 import copy
 import os
 
-
+from cloudinit import safeyaml, stages, util
 from cloudinit.settings import PER_INSTANCE
-from cloudinit import safeyaml
-from cloudinit import stages
 from tests.unittests import helpers
-from cloudinit import util
 
 
 class TestSimpleRun(helpers.FilesystemMockingTestCase):
@@ -18,27 +15,28 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
     def setUp(self):
         super(TestSimpleRun, self).setUp()
         self.new_root = self.tmp_dir()
-        self.replicateTestRoot('simple_ubuntu', self.new_root)
+        self.replicateTestRoot("simple_ubuntu", self.new_root)
 
         # Seed cloud.cfg file for our tests
         self.cfg = {
-            'datasource_list': ['None'],
-            'runcmd': ['ls /etc'],  # test ALL_DISTROS
-            'spacewalk': {},  # test non-ubuntu distros module definition
-            'system_info': {'paths': {'run_dir': self.new_root}},
-            'write_files': [
+            "datasource_list": ["None"],
+            "runcmd": ["ls /etc"],  # test ALL_DISTROS
+            "spacewalk": {},  # test non-ubuntu distros module definition
+            "system_info": {"paths": {"run_dir": self.new_root}},
+            "write_files": [
                 {
-                    'path': '/etc/blah.ini',
-                    'content': 'blah',
-                    'permissions': 0o755,
+                    "path": "/etc/blah.ini",
+                    "content": "blah",
+                    "permissions": 0o755,
                 },
             ],
-            'cloud_init_modules': ['write-files', 'spacewalk', 'runcmd'],
+            "cloud_init_modules": ["write-files", "spacewalk", "runcmd"],
         }
         cloud_cfg = safeyaml.dumps(self.cfg)
-        util.ensure_dir(os.path.join(self.new_root, 'etc', 'cloud'))
-        util.write_file(os.path.join(self.new_root, 'etc',
-                                     'cloud', 'cloud.cfg'), cloud_cfg)
+        util.ensure_dir(os.path.join(self.new_root, "etc", "cloud"))
+        util.write_file(
+            os.path.join(self.new_root, "etc", "cloud", "cloud.cfg"), cloud_cfg
+        )
         self.patchOS(self.new_root)
         self.patchUtils(self.new_root)
 
@@ -49,12 +47,12 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         initer.read_cfg()
         initer.initialize()
         self.assertTrue(os.path.exists("/var/lib/cloud"))
-        for d in ['scripts', 'seed', 'instances', 'handlers', 'sem', 'data']:
+        for d in ["scripts", "seed", "instances", "handlers", "sem", "data"]:
             self.assertTrue(os.path.isdir(os.path.join("/var/lib/cloud", d)))
 
         initer.fetch()
         iid = initer.instancify()
-        self.assertEqual(iid, 'iid-datasource-none')
+        self.assertEqual(iid, "iid-datasource-none")
         initer.update()
         self.assertTrue(os.path.islink("var/lib/cloud/instance"))
 
@@ -66,20 +64,25 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data', initer.consume_data,
-                              args=[PER_INSTANCE], freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
 
         mods = stages.Modules(initer)
-        (which_ran, failures) = mods.run_section('cloud_init_modules')
+        (which_ran, failures) = mods.run_section("cloud_init_modules")
         self.assertTrue(len(failures) == 0)
-        self.assertTrue(os.path.exists('/etc/blah.ini'))
-        self.assertIn('write-files', which_ran)
-        contents = util.load_file('/etc/blah.ini')
-        self.assertEqual(contents, 'blah')
+        self.assertTrue(os.path.exists("/etc/blah.ini"))
+        self.assertIn("write-files", which_ran)
+        contents = util.load_file("/etc/blah.ini")
+        self.assertEqual(contents, "blah")
         self.assertNotIn(
             "Skipping modules ['write-files'] because they are not verified on"
             " distro 'ubuntu'",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
     def test_none_ds_skips_modules_which_define_unmatched_distros(self):
         """Skip modules which define distros which don't match the current."""
@@ -89,17 +92,22 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data', initer.consume_data,
-                              args=[PER_INSTANCE], freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
 
         mods = stages.Modules(initer)
-        (which_ran, failures) = mods.run_section('cloud_init_modules')
+        (which_ran, failures) = mods.run_section("cloud_init_modules")
         self.assertTrue(len(failures) == 0)
         self.assertIn(
             "Skipping modules 'spacewalk' because they are not verified on"
             " distro 'ubuntu'",
-            self.logs.getvalue())
-        self.assertNotIn('spacewalk', which_ran)
+            self.logs.getvalue(),
+        )
+        self.assertNotIn("spacewalk", which_ran)
 
     def test_none_ds_runs_modules_which_distros_all(self):
         """Skip modules which define distros attribute as supporting 'all'.
@@ -113,28 +121,34 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data', initer.consume_data,
-                              args=[PER_INSTANCE], freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
 
         mods = stages.Modules(initer)
-        (which_ran, failures) = mods.run_section('cloud_init_modules')
+        (which_ran, failures) = mods.run_section("cloud_init_modules")
         self.assertTrue(len(failures) == 0)
-        self.assertIn('runcmd', which_ran)
+        self.assertIn("runcmd", which_ran)
         self.assertNotIn(
             "Skipping modules 'runcmd' because they are not verified on"
             " distro 'ubuntu'",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
     def test_none_ds_forces_run_via_unverified_modules(self):
         """run_section forced skipped modules by using unverified_modules."""
 
         # re-write cloud.cfg with unverified_modules override
         cfg = copy.deepcopy(self.cfg)
-        cfg['unverified_modules'] = ['spacewalk']  # Would have skipped
+        cfg["unverified_modules"] = ["spacewalk"]  # Would have skipped
         cloud_cfg = safeyaml.dumps(cfg)
-        util.ensure_dir(os.path.join(self.new_root, 'etc', 'cloud'))
-        util.write_file(os.path.join(self.new_root, 'etc',
-                                     'cloud', 'cloud.cfg'), cloud_cfg)
+        util.ensure_dir(os.path.join(self.new_root, "etc", "cloud"))
+        util.write_file(
+            os.path.join(self.new_root, "etc", "cloud", "cloud.cfg"), cloud_cfg
+        )
 
         initer = stages.Init()
         initer.read_cfg()
@@ -142,16 +156,20 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data', initer.consume_data,
-                              args=[PER_INSTANCE], freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
 
         mods = stages.Modules(initer)
-        (which_ran, failures) = mods.run_section('cloud_init_modules')
+        (which_ran, failures) = mods.run_section("cloud_init_modules")
         self.assertTrue(len(failures) == 0)
-        self.assertIn('spacewalk', which_ran)
+        self.assertIn("spacewalk", which_ran)
         self.assertIn(
-            "running unverified_modules: 'spacewalk'",
-            self.logs.getvalue())
+            "running unverified_modules: 'spacewalk'", self.logs.getvalue()
+        )
 
     def test_none_ds_run_with_no_config_modules(self):
         """run_section will report no modules run when none are configured."""
@@ -159,11 +177,12 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         # re-write cloud.cfg with unverified_modules override
         cfg = copy.deepcopy(self.cfg)
         # Represent empty configuration in /etc/cloud/cloud.cfg
-        cfg['cloud_init_modules'] = None
+        cfg["cloud_init_modules"] = None
         cloud_cfg = safeyaml.dumps(cfg)
-        util.ensure_dir(os.path.join(self.new_root, 'etc', 'cloud'))
-        util.write_file(os.path.join(self.new_root, 'etc',
-                                     'cloud', 'cloud.cfg'), cloud_cfg)
+        util.ensure_dir(os.path.join(self.new_root, "etc", "cloud"))
+        util.write_file(
+            os.path.join(self.new_root, "etc", "cloud", "cloud.cfg"), cloud_cfg
+        )
 
         initer = stages.Init()
         initer.read_cfg()
@@ -171,12 +190,17 @@ class TestSimpleRun(helpers.FilesystemMockingTestCase):
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data', initer.consume_data,
-                              args=[PER_INSTANCE], freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
 
         mods = stages.Modules(initer)
-        (which_ran, failures) = mods.run_section('cloud_init_modules')
+        (which_ran, failures) = mods.run_section("cloud_init_modules")
         self.assertTrue(len(failures) == 0)
         self.assertEqual([], which_ran)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/helpers/test_netlink.py b/tests/unittests/sources/helpers/test_netlink.py
index 478ce375..5eabf104 100644
--- a/tests/unittests/sources/helpers/test_netlink.py
+++ b/tests/unittests/sources/helpers/test_netlink.py
@@ -2,48 +2,64 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from tests.unittests.helpers import CiTestCase, mock
+import codecs
 import socket
 import struct
-import codecs
+
 from cloudinit.sources.helpers.netlink import (
-    NetlinkCreateSocketError, create_bound_netlink_socket, read_netlink_socket,
-    read_rta_oper_state, unpack_rta_attr, wait_for_media_disconnect_connect,
-    wait_for_nic_attach_event, wait_for_nic_detach_event,
-    OPER_DOWN, OPER_UP, OPER_DORMANT, OPER_LOWERLAYERDOWN, OPER_NOTPRESENT,
-    OPER_TESTING, OPER_UNKNOWN, RTATTR_START_OFFSET, RTM_NEWLINK, RTM_DELLINK,
-    RTM_SETLINK, RTM_GETLINK, MAX_SIZE)
+    MAX_SIZE,
+    OPER_DORMANT,
+    OPER_DOWN,
+    OPER_LOWERLAYERDOWN,
+    OPER_NOTPRESENT,
+    OPER_TESTING,
+    OPER_UNKNOWN,
+    OPER_UP,
+    RTATTR_START_OFFSET,
+    RTM_DELLINK,
+    RTM_GETLINK,
+    RTM_NEWLINK,
+    RTM_SETLINK,
+    NetlinkCreateSocketError,
+    create_bound_netlink_socket,
+    read_netlink_socket,
+    read_rta_oper_state,
+    unpack_rta_attr,
+    wait_for_media_disconnect_connect,
+    wait_for_nic_attach_event,
+    wait_for_nic_detach_event,
+)
+from tests.unittests.helpers import CiTestCase, mock
 
 
 def int_to_bytes(i):
-    '''convert integer to binary: eg: 1 to \x01'''
-    hex_value = '{0:x}'.format(i)
-    hex_value = '0' * (len(hex_value) % 2) + hex_value
-    return codecs.decode(hex_value, 'hex_codec')
+    """convert integer to binary: eg: 1 to \x01"""
+    hex_value = "{0:x}".format(i)
+    hex_value = "0" * (len(hex_value) % 2) + hex_value
+    return codecs.decode(hex_value, "hex_codec")
 
 
 class TestCreateBoundNetlinkSocket(CiTestCase):
-
-    @mock.patch('cloudinit.sources.helpers.netlink.socket.socket')
+    @mock.patch("cloudinit.sources.helpers.netlink.socket.socket")
     def test_socket_error_on_create(self, m_socket):
-        '''create_bound_netlink_socket catches socket creation exception'''
+        """create_bound_netlink_socket catches socket creation exception"""
 
         """NetlinkCreateSocketError is raised when socket creation errors."""
         m_socket.side_effect = socket.error("Fake socket failure")
         with self.assertRaises(NetlinkCreateSocketError) as ctx_mgr:
             create_bound_netlink_socket()
         self.assertEqual(
-            'Exception during netlink socket create: Fake socket failure',
-            str(ctx_mgr.exception))
+            "Exception during netlink socket create: Fake socket failure",
+            str(ctx_mgr.exception),
+        )
 
 
 class TestReadNetlinkSocket(CiTestCase):
-
-    @mock.patch('cloudinit.sources.helpers.netlink.socket.socket')
-    @mock.patch('cloudinit.sources.helpers.netlink.select.select')
+    @mock.patch("cloudinit.sources.helpers.netlink.socket.socket")
+    @mock.patch("cloudinit.sources.helpers.netlink.select.select")
     def test_read_netlink_socket(self, m_select, m_socket):
-        '''read_netlink_socket able to receive data'''
-        data = 'netlinktest'
+        """read_netlink_socket able to receive data"""
+        data = "netlinktest"
         m_select.return_value = [m_socket], None, None
         m_socket.recv.return_value = data
         recv_data = read_netlink_socket(m_socket, 2)
@@ -52,10 +68,10 @@ class TestReadNetlinkSocket(CiTestCase):
         self.assertIsNotNone(recv_data)
         self.assertEqual(recv_data, data)
 
-    @mock.patch('cloudinit.sources.helpers.netlink.socket.socket')
-    @mock.patch('cloudinit.sources.helpers.netlink.select.select')
+    @mock.patch("cloudinit.sources.helpers.netlink.socket.socket")
+    @mock.patch("cloudinit.sources.helpers.netlink.select.select")
     def test_netlink_read_timeout(self, m_select, m_socket):
-        '''read_netlink_socket should timeout if nothing to read'''
+        """read_netlink_socket should timeout if nothing to read"""
         m_select.return_value = [], None, None
         data = read_netlink_socket(m_socket, 1)
         m_select.assert_called_with([m_socket], [], [], 1)
@@ -63,35 +79,43 @@ class TestReadNetlinkSocket(CiTestCase):
         self.assertIsNone(data)
 
     def test_read_invalid_socket(self):
-        '''read_netlink_socket raises assert error if socket is invalid'''
+        """read_netlink_socket raises assert error if socket is invalid"""
         socket = None
         with self.assertRaises(AssertionError) as context:
             read_netlink_socket(socket, 1)
-        self.assertTrue('netlink socket is none' in str(context.exception))
+        self.assertTrue("netlink socket is none" in str(context.exception))
 
 
 class TestParseNetlinkMessage(CiTestCase):
-
     def test_read_rta_oper_state(self):
-        '''read_rta_oper_state could parse netlink message and extract data'''
+        """read_rta_oper_state could parse netlink message and extract data"""
         ifname = "eth0"
         bytes = ifname.encode("utf-8")
         buf = bytearray(48)
-        struct.pack_into("HH4sHHc", buf, RTATTR_START_OFFSET, 8, 3, bytes, 5,
-                         16, int_to_bytes(OPER_DOWN))
+        struct.pack_into(
+            "HH4sHHc",
+            buf,
+            RTATTR_START_OFFSET,
+            8,
+            3,
+            bytes,
+            5,
+            16,
+            int_to_bytes(OPER_DOWN),
+        )
         interface_state = read_rta_oper_state(buf)
         self.assertEqual(interface_state.ifname, ifname)
         self.assertEqual(interface_state.operstate, OPER_DOWN)
 
     def test_read_none_data(self):
-        '''read_rta_oper_state raises assert error if data is none'''
+        """read_rta_oper_state raises assert error if data is none"""
         data = None
         with self.assertRaises(AssertionError) as context:
             read_rta_oper_state(data)
-        self.assertEqual('data is none', str(context.exception))
+        self.assertEqual("data is none", str(context.exception))
 
     def test_read_invalid_rta_operstate_none(self):
-        '''read_rta_oper_state returns none if operstate is none'''
+        """read_rta_oper_state returns none if operstate is none"""
         ifname = "eth0"
         buf = bytearray(40)
         bytes = ifname.encode("utf-8")
@@ -100,65 +124,84 @@ class TestParseNetlinkMessage(CiTestCase):
         self.assertIsNone(interface_state)
 
     def test_read_invalid_rta_ifname_none(self):
-        '''read_rta_oper_state returns none if ifname is none'''
+        """read_rta_oper_state returns none if ifname is none"""
         buf = bytearray(40)
-        struct.pack_into("HHc", buf, RTATTR_START_OFFSET, 5, 16,
-                         int_to_bytes(OPER_DOWN))
+        struct.pack_into(
+            "HHc", buf, RTATTR_START_OFFSET, 5, 16, int_to_bytes(OPER_DOWN)
+        )
         interface_state = read_rta_oper_state(buf)
         self.assertIsNone(interface_state)
 
     def test_read_invalid_data_len(self):
-        '''raise assert error if data size is smaller than required size'''
+        """raise assert error if data size is smaller than required size"""
         buf = bytearray(32)
         with self.assertRaises(AssertionError) as context:
             read_rta_oper_state(buf)
-        self.assertTrue('length of data is smaller than RTATTR_START_OFFSET' in
-                        str(context.exception))
+        self.assertTrue(
+            "length of data is smaller than RTATTR_START_OFFSET"
+            in str(context.exception)
+        )
 
     def test_unpack_rta_attr_none_data(self):
-        '''unpack_rta_attr raises assert error if data is none'''
+        """unpack_rta_attr raises assert error if data is none"""
         data = None
         with self.assertRaises(AssertionError) as context:
             unpack_rta_attr(data, RTATTR_START_OFFSET)
-        self.assertTrue('data is none' in str(context.exception))
+        self.assertTrue("data is none" in str(context.exception))
 
     def test_unpack_rta_attr_invalid_offset(self):
-        '''unpack_rta_attr raises assert error if offset is invalid'''
+        """unpack_rta_attr raises assert error if offset is invalid"""
         data = bytearray(48)
         with self.assertRaises(AssertionError) as context:
             unpack_rta_attr(data, "offset")
-        self.assertTrue('offset is not integer' in str(context.exception))
+        self.assertTrue("offset is not integer" in str(context.exception))
         with self.assertRaises(AssertionError) as context:
             unpack_rta_attr(data, 31)
-        self.assertTrue('rta offset is less than expected length' in
-                        str(context.exception))
+        self.assertTrue(
+            "rta offset is less than expected length" in str(context.exception)
+        )
 
 
-@mock.patch('cloudinit.sources.helpers.netlink.socket.socket')
-@mock.patch('cloudinit.sources.helpers.netlink.read_netlink_socket')
+@mock.patch("cloudinit.sources.helpers.netlink.socket.socket")
+@mock.patch("cloudinit.sources.helpers.netlink.read_netlink_socket")
 class TestNicAttachDetach(CiTestCase):
     with_logs = True
 
     def _media_switch_data(self, ifname, msg_type, operstate):
-        '''construct netlink data with specified fields'''
+        """construct netlink data with specified fields"""
         if ifname and operstate is not None:
             data = bytearray(48)
             bytes = ifname.encode("utf-8")
-            struct.pack_into("HH4sHHc", data, RTATTR_START_OFFSET, 8, 3,
-                             bytes, 5, 16, int_to_bytes(operstate))
+            struct.pack_into(
+                "HH4sHHc",
+                data,
+                RTATTR_START_OFFSET,
+                8,
+                3,
+                bytes,
+                5,
+                16,
+                int_to_bytes(operstate),
+            )
         elif ifname:
             data = bytearray(40)
             bytes = ifname.encode("utf-8")
             struct.pack_into("HH4s", data, RTATTR_START_OFFSET, 8, 3, bytes)
         elif operstate:
             data = bytearray(40)
-            struct.pack_into("HHc", data, RTATTR_START_OFFSET, 5, 16,
-                             int_to_bytes(operstate))
+            struct.pack_into(
+                "HHc",
+                data,
+                RTATTR_START_OFFSET,
+                5,
+                16,
+                int_to_bytes(operstate),
+            )
         struct.pack_into("=LHHLL", data, 0, len(data), msg_type, 0, 0, 0)
         return data
 
     def test_nic_attached_oper_down(self, m_read_netlink_socket, m_socket):
-        '''Test for a new nic attached'''
+        """Test for a new nic attached"""
         ifname = "eth0"
         data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN)
         m_read_netlink_socket.side_effect = [data_op_down]
@@ -167,7 +210,7 @@ class TestNicAttachDetach(CiTestCase):
         self.assertEqual(ifname, ifread)
 
     def test_nic_attached_oper_up(self, m_read_netlink_socket, m_socket):
-        '''Test for a new nic attached'''
+        """Test for a new nic attached"""
         ifname = "eth0"
         data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP)
         m_read_netlink_socket.side_effect = [data_op_up]
@@ -176,7 +219,7 @@ class TestNicAttachDetach(CiTestCase):
         self.assertEqual(ifname, ifread)
 
     def test_nic_attach_ignore_existing(self, m_read_netlink_socket, m_socket):
-        '''Test that we read only the interfaces we are interested in.'''
+        """Test that we read only the interfaces we are interested in."""
         data_eth0 = self._media_switch_data("eth0", RTM_NEWLINK, OPER_DOWN)
         data_eth1 = self._media_switch_data("eth1", RTM_NEWLINK, OPER_DOWN)
         m_read_netlink_socket.side_effect = [data_eth0, data_eth1]
@@ -185,7 +228,7 @@ class TestNicAttachDetach(CiTestCase):
         self.assertEqual("eth1", ifread)
 
     def test_nic_attach_read_first(self, m_read_netlink_socket, m_socket):
-        '''Test that we read only the interfaces we are interested in.'''
+        """Test that we read only the interfaces we are interested in."""
         data_eth0 = self._media_switch_data("eth0", RTM_NEWLINK, OPER_DOWN)
         data_eth1 = self._media_switch_data("eth1", RTM_NEWLINK, OPER_DOWN)
         m_read_netlink_socket.side_effect = [data_eth0, data_eth1]
@@ -194,7 +237,7 @@ class TestNicAttachDetach(CiTestCase):
         self.assertEqual("eth0", ifread)
 
     def test_nic_detached(self, m_read_netlink_socket, m_socket):
-        '''Test for an existing nic detached'''
+        """Test for an existing nic detached"""
         ifname = "eth0"
         data_op_down = self._media_switch_data(ifname, RTM_DELLINK, OPER_DOWN)
         m_read_netlink_socket.side_effect = [data_op_down]
@@ -203,32 +246,46 @@ class TestNicAttachDetach(CiTestCase):
         self.assertEqual(ifname, ifread)
 
 
-@mock.patch('cloudinit.sources.helpers.netlink.socket.socket')
-@mock.patch('cloudinit.sources.helpers.netlink.read_netlink_socket')
+@mock.patch("cloudinit.sources.helpers.netlink.socket.socket")
+@mock.patch("cloudinit.sources.helpers.netlink.read_netlink_socket")
 class TestWaitForMediaDisconnectConnect(CiTestCase):
     with_logs = True
 
     def _media_switch_data(self, ifname, msg_type, operstate):
-        '''construct netlink data with specified fields'''
+        """construct netlink data with specified fields"""
         if ifname and operstate is not None:
             data = bytearray(48)
             bytes = ifname.encode("utf-8")
-            struct.pack_into("HH4sHHc", data, RTATTR_START_OFFSET, 8, 3,
-                             bytes, 5, 16, int_to_bytes(operstate))
+            struct.pack_into(
+                "HH4sHHc",
+                data,
+                RTATTR_START_OFFSET,
+                8,
+                3,
+                bytes,
+                5,
+                16,
+                int_to_bytes(operstate),
+            )
         elif ifname:
             data = bytearray(40)
             bytes = ifname.encode("utf-8")
             struct.pack_into("HH4s", data, RTATTR_START_OFFSET, 8, 3, bytes)
         elif operstate:
             data = bytearray(40)
-            struct.pack_into("HHc", data, RTATTR_START_OFFSET, 5, 16,
-                             int_to_bytes(operstate))
+            struct.pack_into(
+                "HHc",
+                data,
+                RTATTR_START_OFFSET,
+                5,
+                16,
+                int_to_bytes(operstate),
+            )
         struct.pack_into("=LHHLL", data, 0, len(data), msg_type, 0, 0, 0)
         return data
 
-    def test_media_down_up_scenario(self, m_read_netlink_socket,
-                                    m_socket):
-        '''Test for media down up sequence for required interface name'''
+    def test_media_down_up_scenario(self, m_read_netlink_socket, m_socket):
+        """Test for media down up sequence for required interface name"""
         ifname = "eth0"
         # construct data for Oper State down
         data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN)
@@ -238,15 +295,16 @@ class TestWaitForMediaDisconnectConnect(CiTestCase):
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 2)
 
-    def test_wait_for_media_switch_diff_interface(self, m_read_netlink_socket,
-                                                  m_socket):
-        '''wait_for_media_disconnect_connect ignores unexpected interfaces.
+    def test_wait_for_media_switch_diff_interface(
+        self, m_read_netlink_socket, m_socket
+    ):
+        """wait_for_media_disconnect_connect ignores unexpected interfaces.
 
         The first two messages are for other interfaces and last two are for
         expected interface. So the function exit only after receiving last
         2 messages and therefore the call count for m_read_netlink_socket
         has to be 4
-        '''
+        """
         other_ifname = "eth1"
         expected_ifname = "eth0"
         data_op_down_eth1 = self._media_switch_data(
@@ -259,51 +317,50 @@ class TestWaitForMediaDisconnectConnect(CiTestCase):
             expected_ifname, RTM_NEWLINK, OPER_DOWN
         )
         data_op_up_eth0 = self._media_switch_data(
-            expected_ifname, RTM_NEWLINK, OPER_UP)
+            expected_ifname, RTM_NEWLINK, OPER_UP
+        )
         m_read_netlink_socket.side_effect = [
             data_op_down_eth1,
             data_op_up_eth1,
             data_op_down_eth0,
-            data_op_up_eth0
+            data_op_up_eth0,
         ]
         wait_for_media_disconnect_connect(m_socket, expected_ifname)
-        self.assertIn('Ignored netlink event on interface %s' % other_ifname,
-                      self.logs.getvalue())
+        self.assertIn(
+            "Ignored netlink event on interface %s" % other_ifname,
+            self.logs.getvalue(),
+        )
         self.assertEqual(m_read_netlink_socket.call_count, 4)
 
     def test_invalid_msgtype_getlink(self, m_read_netlink_socket, m_socket):
-        '''wait_for_media_disconnect_connect ignores GETLINK events.
+        """wait_for_media_disconnect_connect ignores GETLINK events.
 
         The first two messages are for oper down and up for RTM_GETLINK type
         which netlink module will ignore. The last 2 messages are RTM_NEWLINK
         with oper state down and up messages. Therefore the call count for
         m_read_netlink_socket has to be 4 ignoring first 2 messages
         of RTM_GETLINK
-        '''
+        """
         ifname = "eth0"
         data_getlink_down = self._media_switch_data(
             ifname, RTM_GETLINK, OPER_DOWN
         )
-        data_getlink_up = self._media_switch_data(
-            ifname, RTM_GETLINK, OPER_UP
-        )
+        data_getlink_up = self._media_switch_data(ifname, RTM_GETLINK, OPER_UP)
         data_newlink_down = self._media_switch_data(
             ifname, RTM_NEWLINK, OPER_DOWN
         )
-        data_newlink_up = self._media_switch_data(
-            ifname, RTM_NEWLINK, OPER_UP
-        )
+        data_newlink_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP)
         m_read_netlink_socket.side_effect = [
             data_getlink_down,
             data_getlink_up,
             data_newlink_down,
-            data_newlink_up
+            data_newlink_up,
         ]
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 4)
 
     def test_invalid_msgtype_setlink(self, m_read_netlink_socket, m_socket):
-        '''wait_for_media_disconnect_connect ignores SETLINK events.
+        """wait_for_media_disconnect_connect ignores SETLINK events.
 
         The first two messages are for oper down and up for RTM_GETLINK type
         which it will ignore. 3rd and 4th messages are RTM_NEWLINK with down
@@ -311,34 +368,31 @@ class TestWaitForMediaDisconnectConnect(CiTestCase):
         sees down->up scenario. So the call count for m_read_netlink_socket
         has to be 4 ignoring first 2 messages of RTM_GETLINK and
         last 2 messages of RTM_NEWLINK
-        '''
+        """
         ifname = "eth0"
         data_setlink_down = self._media_switch_data(
             ifname, RTM_SETLINK, OPER_DOWN
         )
-        data_setlink_up = self._media_switch_data(
-            ifname, RTM_SETLINK, OPER_UP
-        )
+        data_setlink_up = self._media_switch_data(ifname, RTM_SETLINK, OPER_UP)
         data_newlink_down = self._media_switch_data(
             ifname, RTM_NEWLINK, OPER_DOWN
         )
-        data_newlink_up = self._media_switch_data(
-            ifname, RTM_NEWLINK, OPER_UP
-        )
+        data_newlink_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP)
         m_read_netlink_socket.side_effect = [
             data_setlink_down,
             data_setlink_up,
             data_newlink_down,
             data_newlink_up,
             data_newlink_down,
-            data_newlink_up
+            data_newlink_up,
         ]
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 4)
 
-    def test_netlink_invalid_switch_scenario(self, m_read_netlink_socket,
-                                             m_socket):
-        '''returns only if it receives UP event after a DOWN event'''
+    def test_netlink_invalid_switch_scenario(
+        self, m_read_netlink_socket, m_socket
+    ):
+        """returns only if it receives UP event after a DOWN event"""
         ifname = "eth0"
         data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN)
         data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP)
@@ -358,114 +412,153 @@ class TestWaitForMediaDisconnectConnect(CiTestCase):
             ifname, RTM_NEWLINK, OPER_UNKNOWN
         )
         m_read_netlink_socket.side_effect = [
-            data_op_up, data_op_up,
-            data_op_dormant, data_op_up,
-            data_op_notpresent, data_op_up,
-            data_op_lowerdown, data_op_up,
-            data_op_testing, data_op_up,
-            data_op_unknown, data_op_up,
-            data_op_down, data_op_up
+            data_op_up,
+            data_op_up,
+            data_op_dormant,
+            data_op_up,
+            data_op_notpresent,
+            data_op_up,
+            data_op_lowerdown,
+            data_op_up,
+            data_op_testing,
+            data_op_up,
+            data_op_unknown,
+            data_op_up,
+            data_op_down,
+            data_op_up,
         ]
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 14)
 
-    def test_netlink_valid_inbetween_transitions(self, m_read_netlink_socket,
-                                                 m_socket):
-        '''wait_for_media_disconnect_connect handles in between transitions'''
+    def test_netlink_valid_inbetween_transitions(
+        self, m_read_netlink_socket, m_socket
+    ):
+        """wait_for_media_disconnect_connect handles in between transitions"""
         ifname = "eth0"
         data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN)
         data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP)
         data_op_dormant = self._media_switch_data(
-            ifname, RTM_NEWLINK, OPER_DORMANT)
+            ifname, RTM_NEWLINK, OPER_DORMANT
+        )
         data_op_unknown = self._media_switch_data(
-            ifname, RTM_NEWLINK, OPER_UNKNOWN)
+            ifname, RTM_NEWLINK, OPER_UNKNOWN
+        )
         m_read_netlink_socket.side_effect = [
-            data_op_down, data_op_dormant,
-            data_op_unknown, data_op_up
+            data_op_down,
+            data_op_dormant,
+            data_op_unknown,
+            data_op_up,
         ]
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 4)
 
     def test_netlink_invalid_operstate(self, m_read_netlink_socket, m_socket):
-        '''wait_for_media_disconnect_connect should handle invalid operstates.
+        """wait_for_media_disconnect_connect should handle invalid operstates.
 
         The function should not fail and return even if it receives invalid
         operstates. It always should wait for down up sequence.
-        '''
+        """
         ifname = "eth0"
         data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN)
         data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP)
         data_op_invalid = self._media_switch_data(ifname, RTM_NEWLINK, 7)
         m_read_netlink_socket.side_effect = [
-            data_op_invalid, data_op_up,
-            data_op_down, data_op_invalid,
-            data_op_up
+            data_op_invalid,
+            data_op_up,
+            data_op_down,
+            data_op_invalid,
+            data_op_up,
         ]
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 5)
 
     def test_wait_invalid_socket(self, m_read_netlink_socket, m_socket):
-        '''wait_for_media_disconnect_connect handle none netlink socket.'''
+        """wait_for_media_disconnect_connect handle none netlink socket."""
         socket = None
         ifname = "eth0"
         with self.assertRaises(AssertionError) as context:
             wait_for_media_disconnect_connect(socket, ifname)
-        self.assertTrue('netlink socket is none' in str(context.exception))
+        self.assertTrue("netlink socket is none" in str(context.exception))
 
     def test_wait_invalid_ifname(self, m_read_netlink_socket, m_socket):
-        '''wait_for_media_disconnect_connect handle none interface name'''
+        """wait_for_media_disconnect_connect handle none interface name"""
         ifname = None
         with self.assertRaises(AssertionError) as context:
             wait_for_media_disconnect_connect(m_socket, ifname)
-        self.assertTrue('interface name is none' in str(context.exception))
+        self.assertTrue("interface name is none" in str(context.exception))
         ifname = ""
         with self.assertRaises(AssertionError) as context:
             wait_for_media_disconnect_connect(m_socket, ifname)
-        self.assertTrue('interface name cannot be empty' in
-                        str(context.exception))
+        self.assertTrue(
+            "interface name cannot be empty" in str(context.exception)
+        )
 
     def test_wait_invalid_rta_attr(self, m_read_netlink_socket, m_socket):
-        ''' wait_for_media_disconnect_connect handles invalid rta data'''
+        """wait_for_media_disconnect_connect handles invalid rta data"""
         ifname = "eth0"
         data_invalid1 = self._media_switch_data(None, RTM_NEWLINK, OPER_DOWN)
         data_invalid2 = self._media_switch_data(ifname, RTM_NEWLINK, None)
         data_op_down = self._media_switch_data(ifname, RTM_NEWLINK, OPER_DOWN)
         data_op_up = self._media_switch_data(ifname, RTM_NEWLINK, OPER_UP)
         m_read_netlink_socket.side_effect = [
-            data_invalid1, data_invalid2, data_op_down, data_op_up
+            data_invalid1,
+            data_invalid2,
+            data_op_down,
+            data_op_up,
         ]
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 4)
 
     def test_read_multiple_netlink_msgs(self, m_read_netlink_socket, m_socket):
-        '''Read multiple messages in single receive call'''
+        """Read multiple messages in single receive call"""
         ifname = "eth0"
         bytes = ifname.encode("utf-8")
         data = bytearray(96)
         struct.pack_into("=LHHLL", data, 0, 48, RTM_NEWLINK, 0, 0, 0)
         struct.pack_into(
-            "HH4sHHc", data, RTATTR_START_OFFSET, 8, 3,
-            bytes, 5, 16, int_to_bytes(OPER_DOWN)
+            "HH4sHHc",
+            data,
+            RTATTR_START_OFFSET,
+            8,
+            3,
+            bytes,
+            5,
+            16,
+            int_to_bytes(OPER_DOWN),
         )
         struct.pack_into("=LHHLL", data, 48, 48, RTM_NEWLINK, 0, 0, 0)
         struct.pack_into(
-            "HH4sHHc", data, 48 + RTATTR_START_OFFSET, 8,
-            3, bytes, 5, 16, int_to_bytes(OPER_UP)
+            "HH4sHHc",
+            data,
+            48 + RTATTR_START_OFFSET,
+            8,
+            3,
+            bytes,
+            5,
+            16,
+            int_to_bytes(OPER_UP),
         )
         m_read_netlink_socket.return_value = data
         wait_for_media_disconnect_connect(m_socket, ifname)
         self.assertEqual(m_read_netlink_socket.call_count, 1)
 
     def test_read_partial_netlink_msgs(self, m_read_netlink_socket, m_socket):
-        '''Read partial messages in receive call'''
+        """Read partial messages in receive call"""
         ifname = "eth0"
         bytes = ifname.encode("utf-8")
         data1 = bytearray(112)
         data2 = bytearray(32)
         struct.pack_into("=LHHLL", data1, 0, 48, RTM_NEWLINK, 0, 0, 0)
         struct.pack_into(
-            "HH4sHHc", data1, RTATTR_START_OFFSET, 8, 3,
-            bytes, 5, 16, int_to_bytes(OPER_DOWN)
+            "HH4sHHc",
+            data1,
+            RTATTR_START_OFFSET,
+            8,
+            3,
+            bytes,
+            5,
+            16,
+            int_to_bytes(OPER_DOWN),
         )
         struct.pack_into("=LHHLL", data1, 48, 48, RTM_NEWLINK, 0, 0, 0)
         struct.pack_into(
diff --git a/tests/unittests/sources/helpers/test_openstack.py b/tests/unittests/sources/helpers/test_openstack.py
index 74743e7c..eb87b1ce 100644
--- a/tests/unittests/sources/helpers/test_openstack.py
+++ b/tests/unittests/sources/helpers/test_openstack.py
@@ -8,10 +8,9 @@ from tests.unittests import helpers as test_helpers
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestConvertNetJson(test_helpers.CiTestCase):
-
     def test_phy_types(self):
         """Verify the different known physical types are handled."""
         # network_data.json example from
@@ -19,31 +18,45 @@ class TestConvertNetJson(test_helpers.CiTestCase):
         mac0 = "fa:16:3e:9c:bf:3d"
         net_json = {
             "links": [
-                {"ethernet_mac_address": mac0, "id": "tapcd9f6d46-4a",
-                 "mtu": None, "type": "bridge",
-                 "vif_id": "cd9f6d46-4a3a-43ab-a466-994af9db96fc"}
+                {
+                    "ethernet_mac_address": mac0,
+                    "id": "tapcd9f6d46-4a",
+                    "mtu": None,
+                    "type": "bridge",
+                    "vif_id": "cd9f6d46-4a3a-43ab-a466-994af9db96fc",
+                }
             ],
             "networks": [
-                {"id": "network0", "link": "tapcd9f6d46-4a",
-                 "network_id": "99e88329-f20d-4741-9593-25bf07847b16",
-                 "type": "ipv4_dhcp"}
+                {
+                    "id": "network0",
+                    "link": "tapcd9f6d46-4a",
+                    "network_id": "99e88329-f20d-4741-9593-25bf07847b16",
+                    "type": "ipv4_dhcp",
+                }
             ],
-            "services": [{"address": "8.8.8.8", "type": "dns"}]
+            "services": [{"address": "8.8.8.8", "type": "dns"}],
         }
-        macs = {mac0: 'eth0'}
+        macs = {mac0: "eth0"}
 
         expected = {
-            'version': 1,
-            'config': [
-                {'mac_address': 'fa:16:3e:9c:bf:3d',
-                 'mtu': None, 'name': 'eth0',
-                 'subnets': [{'type': 'dhcp4'}],
-                 'type': 'physical'},
-                {'address': '8.8.8.8', 'type': 'nameserver'}]}
+            "version": 1,
+            "config": [
+                {
+                    "mac_address": "fa:16:3e:9c:bf:3d",
+                    "mtu": None,
+                    "name": "eth0",
+                    "subnets": [{"type": "dhcp4"}],
+                    "type": "physical",
+                },
+                {"address": "8.8.8.8", "type": "nameserver"},
+            ],
+        }
 
         for t in openstack.KNOWN_PHYSICAL_TYPES:
             net_json["links"][0]["type"] = t
             self.assertEqual(
                 expected,
-                openstack.convert_net_json(network_json=net_json,
-                                           known_macs=macs))
+                openstack.convert_net_json(
+                    network_json=net_json, known_macs=macs
+                ),
+            )
diff --git a/tests/unittests/sources/test_aliyun.py b/tests/unittests/sources/test_aliyun.py
index 00209913..8a61d5ee 100644
--- a/tests/unittests/sources/test_aliyun.py
+++ b/tests/unittests/sources/test_aliyun.py
@@ -1,38 +1,46 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import functools
-import httpretty
 import os
 from unittest import mock
 
+import httpretty
+
 from cloudinit import helpers
 from cloudinit.sources import DataSourceAliYun as ay
 from cloudinit.sources.DataSourceEc2 import convert_ec2_metadata_network_config
 from tests.unittests import helpers as test_helpers
 
 DEFAULT_METADATA = {
-    'instance-id': 'aliyun-test-vm-00',
-    'eipv4': '10.0.0.1',
-    'hostname': 'test-hostname',
-    'image-id': 'm-test',
-    'launch-index': '0',
-    'mac': '00:16:3e:00:00:00',
-    'network-type': 'vpc',
-    'private-ipv4': '192.168.0.1',
-    'serial-number': 'test-string',
-    'vpc-cidr-block': '192.168.0.0/16',
-    'vpc-id': 'test-vpc',
-    'vswitch-id': 'test-vpc',
-    'vswitch-cidr-block': '192.168.0.0/16',
-    'zone-id': 'test-zone-1',
-    'ntp-conf': {'ntp_servers': [
-                 'ntp1.aliyun.com',
-                 'ntp2.aliyun.com',
-                 'ntp3.aliyun.com']},
-    'source-address': ['http://mirrors.aliyun.com',
-                       'http://mirrors.aliyuncs.com'],
-    'public-keys': {'key-pair-1': {'openssh-key': 'ssh-rsa AAAAB3...'},
-                    'key-pair-2': {'openssh-key': 'ssh-rsa AAAAB3...'}}
+    "instance-id": "aliyun-test-vm-00",
+    "eipv4": "10.0.0.1",
+    "hostname": "test-hostname",
+    "image-id": "m-test",
+    "launch-index": "0",
+    "mac": "00:16:3e:00:00:00",
+    "network-type": "vpc",
+    "private-ipv4": "192.168.0.1",
+    "serial-number": "test-string",
+    "vpc-cidr-block": "192.168.0.0/16",
+    "vpc-id": "test-vpc",
+    "vswitch-id": "test-vpc",
+    "vswitch-cidr-block": "192.168.0.0/16",
+    "zone-id": "test-zone-1",
+    "ntp-conf": {
+        "ntp_servers": [
+            "ntp1.aliyun.com",
+            "ntp2.aliyun.com",
+            "ntp3.aliyun.com",
+        ]
+    },
+    "source-address": [
+        "http://mirrors.aliyun.com",
+        "http://mirrors.aliyuncs.com",
+    ],
+    "public-keys": {
+        "key-pair-1": {"openssh-key": "ssh-rsa AAAAB3..."},
+        "key-pair-2": {"openssh-key": "ssh-rsa AAAAB3..."},
+    },
 }
 
 DEFAULT_USERDATA = """\
@@ -46,21 +54,22 @@ def register_mock_metaserver(base_url, data):
         if isinstance(body, str):
             register(base_url, body)
         elif isinstance(body, list):
-            register(base_url.rstrip('/'), '\n'.join(body) + '\n')
+            register(base_url.rstrip("/"), "\n".join(body) + "\n")
         elif isinstance(body, dict):
             if not body:
-                register(base_url.rstrip('/') + '/', 'not found',
-                         status_code=404)
+                register(
+                    base_url.rstrip("/") + "/", "not found", status_code=404
+                )
             vals = []
             for k, v in body.items():
                 if isinstance(v, (str, list)):
-                    suffix = k.rstrip('/')
+                    suffix = k.rstrip("/")
                 else:
-                    suffix = k.rstrip('/') + '/'
+                    suffix = k.rstrip("/") + "/"
                 vals.append(suffix)
-                url = base_url.rstrip('/') + '/' + suffix
+                url = base_url.rstrip("/") + "/" + suffix
                 register_helper(register, url, v)
-            register(base_url, '\n'.join(vals) + '\n')
+            register(base_url, "\n".join(vals) + "\n")
 
     register = functools.partial(httpretty.register_uri, httpretty.GET)
     register_helper(register, base_url, data)
@@ -69,9 +78,9 @@ def register_mock_metaserver(base_url, data):
 class TestAliYunDatasource(test_helpers.HttprettyTestCase):
     def setUp(self):
         super(TestAliYunDatasource, self).setUp()
-        cfg = {'datasource': {'AliYun': {'timeout': '1', 'max_wait': '1'}}}
+        cfg = {"datasource": {"AliYun": {"timeout": "1", "max_wait": "1"}}}
         distro = {}
-        paths = helpers.Paths({'run_dir': self.tmp_dir()})
+        paths = helpers.Paths({"run_dir": self.tmp_dir()})
         self.ds = ay.DataSourceAliYun(cfg, distro, paths)
         self.metadata_address = self.ds.metadata_urls[0]
 
@@ -85,15 +94,20 @@ class TestAliYunDatasource(test_helpers.HttprettyTestCase):
 
     @property
     def metadata_url(self):
-        return os.path.join(
-            self.metadata_address,
-            self.ds.min_metadata_version, 'meta-data') + '/'
+        return (
+            os.path.join(
+                self.metadata_address,
+                self.ds.min_metadata_version,
+                "meta-data",
+            )
+            + "/"
+        )
 
     @property
     def userdata_url(self):
         return os.path.join(
-            self.metadata_address,
-            self.ds.min_metadata_version, 'user-data')
+            self.metadata_address, self.ds.min_metadata_version, "user-data"
+        )
 
     # EC2 provides an instance-identity document which must return 404 here
     # for this test to pass.
@@ -103,9 +117,12 @@ class TestAliYunDatasource(test_helpers.HttprettyTestCase):
 
     @property
     def identity_url(self):
-        return os.path.join(self.metadata_address,
-                            self.ds.min_metadata_version,
-                            'dynamic', 'instance-identity')
+        return os.path.join(
+            self.metadata_address,
+            self.ds.min_metadata_version,
+            "dynamic",
+            "instance-identity",
+        )
 
     def regist_default_server(self):
         register_mock_metaserver(self.metadata_url, self.default_metadata)
@@ -114,21 +131,26 @@ class TestAliYunDatasource(test_helpers.HttprettyTestCase):
 
     def _test_get_data(self):
         self.assertEqual(self.ds.metadata, self.default_metadata)
-        self.assertEqual(self.ds.userdata_raw,
-                         self.default_userdata.encode('utf8'))
+        self.assertEqual(
+            self.ds.userdata_raw, self.default_userdata.encode("utf8")
+        )
 
     def _test_get_sshkey(self):
-        pub_keys = [v['openssh-key'] for (_, v) in
-                    self.default_metadata['public-keys'].items()]
+        pub_keys = [
+            v["openssh-key"]
+            for (_, v) in self.default_metadata["public-keys"].items()
+        ]
         self.assertEqual(self.ds.get_public_ssh_keys(), pub_keys)
 
     def _test_get_iid(self):
-        self.assertEqual(self.default_metadata['instance-id'],
-                         self.ds.get_instance_id())
+        self.assertEqual(
+            self.default_metadata["instance-id"], self.ds.get_instance_id()
+        )
 
     def _test_host_name(self):
-        self.assertEqual(self.default_metadata['hostname'],
-                         self.ds.get_hostname())
+        self.assertEqual(
+            self.default_metadata["hostname"], self.ds.get_hostname()
+        )
 
     @mock.patch("cloudinit.sources.DataSourceAliYun._is_aliyun")
     def test_with_mock_server(self, m_is_aliyun):
@@ -141,10 +163,11 @@ class TestAliYunDatasource(test_helpers.HttprettyTestCase):
         self._test_get_sshkey()
         self._test_get_iid()
         self._test_host_name()
-        self.assertEqual('aliyun', self.ds.cloud_name)
-        self.assertEqual('ec2', self.ds.platform)
+        self.assertEqual("aliyun", self.ds.cloud_name)
+        self.assertEqual("ec2", self.ds.platform)
         self.assertEqual(
-            'metadata (http://100.100.100.200)', self.ds.subplatform)
+            "metadata (http://100.100.100.200)", self.ds.subplatform
+        )
 
     @mock.patch("cloudinit.sources.DataSourceAliYun._is_aliyun")
     def test_returns_false_when_not_on_aliyun(self, m_is_aliyun):
@@ -159,30 +182,38 @@ class TestAliYunDatasource(test_helpers.HttprettyTestCase):
         public_keys = {}
         self.assertEqual(ay.parse_public_keys(public_keys), [])
 
-        public_keys = {'key-pair-0': 'ssh-key-0'}
-        self.assertEqual(ay.parse_public_keys(public_keys),
-                         [public_keys['key-pair-0']])
+        public_keys = {"key-pair-0": "ssh-key-0"}
+        self.assertEqual(
+            ay.parse_public_keys(public_keys), [public_keys["key-pair-0"]]
+        )
 
-        public_keys = {'key-pair-0': 'ssh-key-0', 'key-pair-1': 'ssh-key-1'}
-        self.assertEqual(set(ay.parse_public_keys(public_keys)),
-                         set([public_keys['key-pair-0'],
-                             public_keys['key-pair-1']]))
+        public_keys = {"key-pair-0": "ssh-key-0", "key-pair-1": "ssh-key-1"}
+        self.assertEqual(
+            set(ay.parse_public_keys(public_keys)),
+            set([public_keys["key-pair-0"], public_keys["key-pair-1"]]),
+        )
 
-        public_keys = {'key-pair-0': ['ssh-key-0', 'ssh-key-1']}
-        self.assertEqual(ay.parse_public_keys(public_keys),
-                         public_keys['key-pair-0'])
+        public_keys = {"key-pair-0": ["ssh-key-0", "ssh-key-1"]}
+        self.assertEqual(
+            ay.parse_public_keys(public_keys), public_keys["key-pair-0"]
+        )
 
-        public_keys = {'key-pair-0': {'openssh-key': []}}
+        public_keys = {"key-pair-0": {"openssh-key": []}}
         self.assertEqual(ay.parse_public_keys(public_keys), [])
 
-        public_keys = {'key-pair-0': {'openssh-key': 'ssh-key-0'}}
-        self.assertEqual(ay.parse_public_keys(public_keys),
-                         [public_keys['key-pair-0']['openssh-key']])
+        public_keys = {"key-pair-0": {"openssh-key": "ssh-key-0"}}
+        self.assertEqual(
+            ay.parse_public_keys(public_keys),
+            [public_keys["key-pair-0"]["openssh-key"]],
+        )
 
-        public_keys = {'key-pair-0': {'openssh-key': ['ssh-key-0',
-                                                      'ssh-key-1']}}
-        self.assertEqual(ay.parse_public_keys(public_keys),
-                         public_keys['key-pair-0']['openssh-key'])
+        public_keys = {
+            "key-pair-0": {"openssh-key": ["ssh-key-0", "ssh-key-1"]}
+        }
+        self.assertEqual(
+            ay.parse_public_keys(public_keys),
+            public_keys["key-pair-0"]["openssh-key"],
+        )
 
     def test_route_metric_calculated_without_device_number(self):
         """Test that route-metric code works without `device-number`
@@ -193,38 +224,43 @@ class TestAliYunDatasource(test_helpers.HttprettyTestCase):
         LP: #1917875
         """
         netcfg = convert_ec2_metadata_network_config(
-            {"interfaces": {"macs": {
-                "06:17:04:d7:26:09": {
-                    "interface-id": "eni-e44ef49e",
-                },
-                "06:17:04:d7:26:08": {
-                    "interface-id": "eni-e44ef49f",
+            {
+                "interfaces": {
+                    "macs": {
+                        "06:17:04:d7:26:09": {
+                            "interface-id": "eni-e44ef49e",
+                        },
+                        "06:17:04:d7:26:08": {
+                            "interface-id": "eni-e44ef49f",
+                        },
+                    }
                 }
-            }}},
+            },
             macs_to_nics={
-                '06:17:04:d7:26:09': 'eth0',
-                '06:17:04:d7:26:08': 'eth1',
-            }
+                "06:17:04:d7:26:09": "eth0",
+                "06:17:04:d7:26:08": "eth1",
+            },
         )
 
-        met0 = netcfg['ethernets']['eth0']['dhcp4-overrides']['route-metric']
-        met1 = netcfg['ethernets']['eth1']['dhcp4-overrides']['route-metric']
+        met0 = netcfg["ethernets"]["eth0"]["dhcp4-overrides"]["route-metric"]
+        met1 = netcfg["ethernets"]["eth1"]["dhcp4-overrides"]["route-metric"]
 
         # route-metric numbers should be 100 apart
         assert 100 == abs(met0 - met1)
 
 
 class TestIsAliYun(test_helpers.CiTestCase):
-    ALIYUN_PRODUCT = 'Alibaba Cloud ECS'
-    read_dmi_data_expected = [mock.call('system-product-name')]
+    ALIYUN_PRODUCT = "Alibaba Cloud ECS"
+    read_dmi_data_expected = [mock.call("system-product-name")]
 
     @mock.patch("cloudinit.sources.DataSourceAliYun.dmi.read_dmi_data")
     def test_true_on_aliyun_product(self, m_read_dmi_data):
         """Should return true if the dmi product data has expected value."""
         m_read_dmi_data.return_value = self.ALIYUN_PRODUCT
         ret = ay._is_aliyun()
-        self.assertEqual(self.read_dmi_data_expected,
-                         m_read_dmi_data.call_args_list)
+        self.assertEqual(
+            self.read_dmi_data_expected, m_read_dmi_data.call_args_list
+        )
         self.assertEqual(True, ret)
 
     @mock.patch("cloudinit.sources.DataSourceAliYun.dmi.read_dmi_data")
@@ -232,8 +268,9 @@ class TestIsAliYun(test_helpers.CiTestCase):
         """Should return false on empty value returned."""
         m_read_dmi_data.return_value = ""
         ret = ay._is_aliyun()
-        self.assertEqual(self.read_dmi_data_expected,
-                         m_read_dmi_data.call_args_list)
+        self.assertEqual(
+            self.read_dmi_data_expected, m_read_dmi_data.call_args_list
+        )
         self.assertEqual(False, ret)
 
     @mock.patch("cloudinit.sources.DataSourceAliYun.dmi.read_dmi_data")
@@ -241,8 +278,10 @@ class TestIsAliYun(test_helpers.CiTestCase):
         """Should return false on an unrelated string."""
         m_read_dmi_data.return_value = "cubs win"
         ret = ay._is_aliyun()
-        self.assertEqual(self.read_dmi_data_expected,
-                         m_read_dmi_data.call_args_list)
+        self.assertEqual(
+            self.read_dmi_data_expected, m_read_dmi_data.call_args_list
+        )
         self.assertEqual(False, ret)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_altcloud.py b/tests/unittests/sources/test_altcloud.py
index 7384c104..44dfafd9 100644
--- a/tests/unittests/sources/test_altcloud.py
+++ b/tests/unittests/sources/test_altcloud.py
@@ -6,54 +6,47 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-'''
+"""
 This test file exercises the code in sources DataSourceAltCloud.py
-'''
+"""
 
 import os
 import shutil
 import tempfile
 
-from cloudinit import dmi
-from cloudinit import helpers
-from cloudinit import subp
-from cloudinit import util
-
-from tests.unittests.helpers import CiTestCase, mock
-
 import cloudinit.sources.DataSourceAltCloud as dsac
+from cloudinit import dmi, helpers, subp, util
+from tests.unittests.helpers import CiTestCase, mock
 
-OS_UNAME_ORIG = getattr(os, 'uname')
+OS_UNAME_ORIG = getattr(os, "uname")
 
 
 def _write_user_data_files(mount_dir, value):
-    '''
+    """
     Populate the deltacloud_user_data_file the user_data_file
     which would be populated with user data.
-    '''
-    deltacloud_user_data_file = mount_dir + '/deltacloud-user-data.txt'
-    user_data_file = mount_dir + '/user-data.txt'
+    """
+    deltacloud_user_data_file = mount_dir + "/deltacloud-user-data.txt"
+    user_data_file = mount_dir + "/user-data.txt"
 
-    udfile = open(deltacloud_user_data_file, 'w')
+    udfile = open(deltacloud_user_data_file, "w")
     udfile.write(value)
     udfile.close()
     os.chmod(deltacloud_user_data_file, 0o664)
 
-    udfile = open(user_data_file, 'w')
+    udfile = open(user_data_file, "w")
     udfile.write(value)
     udfile.close()
     os.chmod(user_data_file, 0o664)
 
 
-def _remove_user_data_files(mount_dir,
-                            dc_file=True,
-                            non_dc_file=True):
-    '''
+def _remove_user_data_files(mount_dir, dc_file=True, non_dc_file=True):
+    """
     Remove the test files: deltacloud_user_data_file and
     user_data_file
-    '''
-    deltacloud_user_data_file = mount_dir + '/deltacloud-user-data.txt'
-    user_data_file = mount_dir + '/user-data.txt'
+    """
+    deltacloud_user_data_file = mount_dir + "/deltacloud-user-data.txt"
+    user_data_file = mount_dir + "/user-data.txt"
 
     # Ignore any failures removeing files that are already gone.
     if dc_file:
@@ -70,9 +63,10 @@ def _remove_user_data_files(mount_dir,
 
 
 def _dmi_data(expected):
-    '''
+    """
     Spoof the data received over DMI
-    '''
+    """
+
     def _data(key):
         return expected
 
@@ -80,19 +74,19 @@ def _dmi_data(expected):
 
 
 class TestGetCloudType(CiTestCase):
-    '''Test to exercise method: DataSourceAltCloud.get_cloud_type()'''
+    """Test to exercise method: DataSourceAltCloud.get_cloud_type()"""
 
     with_logs = True
 
     def setUp(self):
-        '''Set up.'''
+        """Set up."""
         super(TestGetCloudType, self).setUp()
         self.tmp = self.tmp_dir()
-        self.paths = helpers.Paths({'cloud_dir': self.tmp})
+        self.paths = helpers.Paths({"cloud_dir": self.tmp})
         self.dmi_data = dmi.read_dmi_data
         # We have a different code path for arm to deal with LP1243287
         # We have to switch arch to x86_64 to avoid test failure
-        force_arch('x86_64')
+        force_arch("x86_64")
 
     def tearDown(self):
         # Reset
@@ -101,216 +95,226 @@ class TestGetCloudType(CiTestCase):
 
     def test_cloud_info_file_ioerror(self):
         """Return UNKNOWN when /etc/sysconfig/cloud-info exists but errors."""
-        self.assertEqual('/etc/sysconfig/cloud-info', dsac.CLOUD_INFO_FILE)
+        self.assertEqual("/etc/sysconfig/cloud-info", dsac.CLOUD_INFO_FILE)
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         # Attempting to read the directory generates IOError
-        with mock.patch.object(dsac, 'CLOUD_INFO_FILE', self.tmp):
-            self.assertEqual('UNKNOWN', dsrc.get_cloud_type())
+        with mock.patch.object(dsac, "CLOUD_INFO_FILE", self.tmp):
+            self.assertEqual("UNKNOWN", dsrc.get_cloud_type())
         self.assertIn(
-            "[Errno 21] Is a directory: '%s'" % self.tmp,
-            self.logs.getvalue())
+            "[Errno 21] Is a directory: '%s'" % self.tmp, self.logs.getvalue()
+        )
 
     def test_cloud_info_file(self):
         """Return uppercase stripped content from /etc/sysconfig/cloud-info."""
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
-        cloud_info = self.tmp_path('cloud-info', dir=self.tmp)
-        util.write_file(cloud_info, ' OverRiDdeN CloudType ')
+        cloud_info = self.tmp_path("cloud-info", dir=self.tmp)
+        util.write_file(cloud_info, " OverRiDdeN CloudType ")
         # Attempting to read the directory generates IOError
-        with mock.patch.object(dsac, 'CLOUD_INFO_FILE', cloud_info):
-            self.assertEqual('OVERRIDDEN CLOUDTYPE', dsrc.get_cloud_type())
+        with mock.patch.object(dsac, "CLOUD_INFO_FILE", cloud_info):
+            self.assertEqual("OVERRIDDEN CLOUDTYPE", dsrc.get_cloud_type())
 
     def test_rhev(self):
-        '''
+        """
         Test method get_cloud_type() for RHEVm systems.
         Forcing read_dmi_data return to match a RHEVm system: RHEV Hypervisor
-        '''
-        dmi.read_dmi_data = _dmi_data('RHEV')
+        """
+        dmi.read_dmi_data = _dmi_data("RHEV")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
-        self.assertEqual('RHEV', dsrc.get_cloud_type())
+        self.assertEqual("RHEV", dsrc.get_cloud_type())
 
     def test_vsphere(self):
-        '''
+        """
         Test method get_cloud_type() for vSphere systems.
         Forcing read_dmi_data return to match a vSphere system: RHEV Hypervisor
-        '''
-        dmi.read_dmi_data = _dmi_data('VMware Virtual Platform')
+        """
+        dmi.read_dmi_data = _dmi_data("VMware Virtual Platform")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
-        self.assertEqual('VSPHERE', dsrc.get_cloud_type())
+        self.assertEqual("VSPHERE", dsrc.get_cloud_type())
 
     def test_unknown(self):
-        '''
+        """
         Test method get_cloud_type() for unknown systems.
         Forcing read_dmi_data return to match an unrecognized return.
-        '''
-        dmi.read_dmi_data = _dmi_data('Unrecognized Platform')
+        """
+        dmi.read_dmi_data = _dmi_data("Unrecognized Platform")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
-        self.assertEqual('UNKNOWN', dsrc.get_cloud_type())
+        self.assertEqual("UNKNOWN", dsrc.get_cloud_type())
 
 
 class TestGetDataCloudInfoFile(CiTestCase):
-    '''
+    """
     Test to exercise method: DataSourceAltCloud.get_data()
     With a contrived CLOUD_INFO_FILE
-    '''
+    """
+
     def setUp(self):
-        '''Set up.'''
+        """Set up."""
         self.tmp = self.tmp_dir()
         self.paths = helpers.Paths(
-            {'cloud_dir': self.tmp, 'run_dir': self.tmp})
-        self.cloud_info_file = self.tmp_path('cloud-info', dir=self.tmp)
+            {"cloud_dir": self.tmp, "run_dir": self.tmp}
+        )
+        self.cloud_info_file = self.tmp_path("cloud-info", dir=self.tmp)
 
     def test_rhev(self):
-        '''Success Test module get_data() forcing RHEV.'''
+        """Success Test module get_data() forcing RHEV."""
 
-        util.write_file(self.cloud_info_file, 'RHEV')
+        util.write_file(self.cloud_info_file, "RHEV")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_rhevm = lambda: True
-        with mock.patch.object(dsac, 'CLOUD_INFO_FILE', self.cloud_info_file):
+        with mock.patch.object(dsac, "CLOUD_INFO_FILE", self.cloud_info_file):
             self.assertEqual(True, dsrc.get_data())
-        self.assertEqual('altcloud', dsrc.cloud_name)
-        self.assertEqual('altcloud', dsrc.platform_type)
-        self.assertEqual('rhev (/dev/fd0)', dsrc.subplatform)
+        self.assertEqual("altcloud", dsrc.cloud_name)
+        self.assertEqual("altcloud", dsrc.platform_type)
+        self.assertEqual("rhev (/dev/fd0)", dsrc.subplatform)
 
     def test_vsphere(self):
-        '''Success Test module get_data() forcing VSPHERE.'''
+        """Success Test module get_data() forcing VSPHERE."""
 
-        util.write_file(self.cloud_info_file, 'VSPHERE')
+        util.write_file(self.cloud_info_file, "VSPHERE")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_vsphere = lambda: True
-        with mock.patch.object(dsac, 'CLOUD_INFO_FILE', self.cloud_info_file):
+        with mock.patch.object(dsac, "CLOUD_INFO_FILE", self.cloud_info_file):
             self.assertEqual(True, dsrc.get_data())
-        self.assertEqual('altcloud', dsrc.cloud_name)
-        self.assertEqual('altcloud', dsrc.platform_type)
-        self.assertEqual('vsphere (unknown)', dsrc.subplatform)
+        self.assertEqual("altcloud", dsrc.cloud_name)
+        self.assertEqual("altcloud", dsrc.platform_type)
+        self.assertEqual("vsphere (unknown)", dsrc.subplatform)
 
     def test_fail_rhev(self):
-        '''Failure Test module get_data() forcing RHEV.'''
+        """Failure Test module get_data() forcing RHEV."""
 
-        util.write_file(self.cloud_info_file, 'RHEV')
+        util.write_file(self.cloud_info_file, "RHEV")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_rhevm = lambda: False
-        with mock.patch.object(dsac, 'CLOUD_INFO_FILE', self.cloud_info_file):
+        with mock.patch.object(dsac, "CLOUD_INFO_FILE", self.cloud_info_file):
             self.assertEqual(False, dsrc.get_data())
 
     def test_fail_vsphere(self):
-        '''Failure Test module get_data() forcing VSPHERE.'''
+        """Failure Test module get_data() forcing VSPHERE."""
 
-        util.write_file(self.cloud_info_file, 'VSPHERE')
+        util.write_file(self.cloud_info_file, "VSPHERE")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_vsphere = lambda: False
-        with mock.patch.object(dsac, 'CLOUD_INFO_FILE', self.cloud_info_file):
+        with mock.patch.object(dsac, "CLOUD_INFO_FILE", self.cloud_info_file):
             self.assertEqual(False, dsrc.get_data())
 
     def test_unrecognized(self):
-        '''Failure Test module get_data() forcing unrecognized.'''
+        """Failure Test module get_data() forcing unrecognized."""
 
-        util.write_file(self.cloud_info_file, 'unrecognized')
+        util.write_file(self.cloud_info_file, "unrecognized")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
-        with mock.patch.object(dsac, 'CLOUD_INFO_FILE', self.cloud_info_file):
+        with mock.patch.object(dsac, "CLOUD_INFO_FILE", self.cloud_info_file):
             self.assertEqual(False, dsrc.get_data())
 
 
 class TestGetDataNoCloudInfoFile(CiTestCase):
-    '''
+    """
     Test to exercise method: DataSourceAltCloud.get_data()
     Without a CLOUD_INFO_FILE
-    '''
+    """
+
     def setUp(self):
-        '''Set up.'''
+        """Set up."""
         self.tmp = self.tmp_dir()
         self.paths = helpers.Paths(
-            {'cloud_dir': self.tmp, 'run_dir': self.tmp})
+            {"cloud_dir": self.tmp, "run_dir": self.tmp}
+        )
         self.dmi_data = dmi.read_dmi_data
-        dsac.CLOUD_INFO_FILE = \
-            'no such file'
+        dsac.CLOUD_INFO_FILE = "no such file"
         # We have a different code path for arm to deal with LP1243287
         # We have to switch arch to x86_64 to avoid test failure
-        force_arch('x86_64')
+        force_arch("x86_64")
 
     def tearDown(self):
         # Reset
-        dsac.CLOUD_INFO_FILE = \
-            '/etc/sysconfig/cloud-info'
+        dsac.CLOUD_INFO_FILE = "/etc/sysconfig/cloud-info"
         dmi.read_dmi_data = self.dmi_data
         # Return back to original arch
         force_arch()
 
     def test_rhev_no_cloud_file(self):
-        '''Test No cloud info file module get_data() forcing RHEV.'''
+        """Test No cloud info file module get_data() forcing RHEV."""
 
-        dmi.read_dmi_data = _dmi_data('RHEV Hypervisor')
+        dmi.read_dmi_data = _dmi_data("RHEV Hypervisor")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_rhevm = lambda: True
         self.assertEqual(True, dsrc.get_data())
 
     def test_vsphere_no_cloud_file(self):
-        '''Test No cloud info file module get_data() forcing VSPHERE.'''
+        """Test No cloud info file module get_data() forcing VSPHERE."""
 
-        dmi.read_dmi_data = _dmi_data('VMware Virtual Platform')
+        dmi.read_dmi_data = _dmi_data("VMware Virtual Platform")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         dsrc.user_data_vsphere = lambda: True
         self.assertEqual(True, dsrc.get_data())
 
     def test_failure_no_cloud_file(self):
-        '''Test No cloud info file module get_data() forcing unrecognized.'''
+        """Test No cloud info file module get_data() forcing unrecognized."""
 
-        dmi.read_dmi_data = _dmi_data('Unrecognized Platform')
+        dmi.read_dmi_data = _dmi_data("Unrecognized Platform")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         self.assertEqual(False, dsrc.get_data())
 
 
 class TestUserDataRhevm(CiTestCase):
-    '''
+    """
     Test to exercise method: DataSourceAltCloud.user_data_rhevm()
-    '''
+    """
+
     def setUp(self):
-        '''Set up.'''
-        self.paths = helpers.Paths({'cloud_dir': '/tmp'})
+        """Set up."""
+        self.paths = helpers.Paths({"cloud_dir": "/tmp"})
         self.mount_dir = self.tmp_dir()
-        _write_user_data_files(self.mount_dir, 'test user data')
+        _write_user_data_files(self.mount_dir, "test user data")
         self.add_patch(
-            'cloudinit.sources.DataSourceAltCloud.modprobe_floppy',
-            'm_modprobe_floppy', return_value=None)
+            "cloudinit.sources.DataSourceAltCloud.modprobe_floppy",
+            "m_modprobe_floppy",
+            return_value=None,
+        )
         self.add_patch(
-            'cloudinit.sources.DataSourceAltCloud.util.udevadm_settle',
-            'm_udevadm_settle', return_value=('', ''))
+            "cloudinit.sources.DataSourceAltCloud.util.udevadm_settle",
+            "m_udevadm_settle",
+            return_value=("", ""),
+        )
         self.add_patch(
-            'cloudinit.sources.DataSourceAltCloud.util.mount_cb',
-            'm_mount_cb')
+            "cloudinit.sources.DataSourceAltCloud.util.mount_cb", "m_mount_cb"
+        )
 
     def test_mount_cb_fails(self):
-        '''Test user_data_rhevm() where mount_cb fails.'''
+        """Test user_data_rhevm() where mount_cb fails."""
 
         self.m_mount_cb.side_effect = util.MountFailedError("Failed Mount")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         self.assertEqual(False, dsrc.user_data_rhevm())
 
     def test_modprobe_fails(self):
-        '''Test user_data_rhevm() where modprobe fails.'''
+        """Test user_data_rhevm() where modprobe fails."""
 
         self.m_modprobe_floppy.side_effect = subp.ProcessExecutionError(
-            "Failed modprobe")
+            "Failed modprobe"
+        )
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         self.assertEqual(False, dsrc.user_data_rhevm())
 
     def test_no_modprobe_cmd(self):
-        '''Test user_data_rhevm() with no modprobe command.'''
+        """Test user_data_rhevm() with no modprobe command."""
 
         self.m_modprobe_floppy.side_effect = subp.ProcessExecutionError(
-            "No such file or dir")
+            "No such file or dir"
+        )
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         self.assertEqual(False, dsrc.user_data_rhevm())
 
     def test_udevadm_fails(self):
-        '''Test user_data_rhevm() where udevadm fails.'''
+        """Test user_data_rhevm() where udevadm fails."""
 
         self.m_udevadm_settle.side_effect = subp.ProcessExecutionError(
-            "Failed settle.")
+            "Failed settle."
+        )
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
         self.assertEqual(False, dsrc.user_data_rhevm())
 
     def test_no_udevadm_cmd(self):
-        '''Test user_data_rhevm() with no udevadm command.'''
+        """Test user_data_rhevm() with no udevadm command."""
 
         self.m_udevadm_settle.side_effect = OSError("No such file or dir")
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
@@ -318,16 +322,17 @@ class TestUserDataRhevm(CiTestCase):
 
 
 class TestUserDataVsphere(CiTestCase):
-    '''
+    """
     Test to exercise method: DataSourceAltCloud.user_data_vsphere()
-    '''
+    """
+
     def setUp(self):
-        '''Set up.'''
+        """Set up."""
         self.tmp = self.tmp_dir()
-        self.paths = helpers.Paths({'cloud_dir': self.tmp})
+        self.paths = helpers.Paths({"cloud_dir": self.tmp})
         self.mount_dir = tempfile.mkdtemp()
 
-        _write_user_data_files(self.mount_dir, 'test user data')
+        _write_user_data_files(self.mount_dir, "test user data")
 
     def tearDown(self):
         # Reset
@@ -340,13 +345,12 @@ class TestUserDataVsphere(CiTestCase):
         except OSError:
             pass
 
-        dsac.CLOUD_INFO_FILE = \
-            '/etc/sysconfig/cloud-info'
+        dsac.CLOUD_INFO_FILE = "/etc/sysconfig/cloud-info"
 
     @mock.patch("cloudinit.sources.DataSourceAltCloud.util.find_devs_with")
     @mock.patch("cloudinit.sources.DataSourceAltCloud.util.mount_cb")
     def test_user_data_vsphere_no_cdrom(self, m_mount_cb, m_find_devs_with):
-        '''Test user_data_vsphere() where mount_cb fails.'''
+        """Test user_data_vsphere() where mount_cb fails."""
 
         m_mount_cb.return_value = []
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
@@ -356,7 +360,7 @@ class TestUserDataVsphere(CiTestCase):
     @mock.patch("cloudinit.sources.DataSourceAltCloud.util.find_devs_with")
     @mock.patch("cloudinit.sources.DataSourceAltCloud.util.mount_cb")
     def test_user_data_vsphere_mcb_fail(self, m_mount_cb, m_find_devs_with):
-        '''Test user_data_vsphere() where mount_cb fails.'''
+        """Test user_data_vsphere() where mount_cb fails."""
 
         m_find_devs_with.return_value = ["/dev/mock/cdrom"]
         m_mount_cb.side_effect = util.MountFailedError("Unable To mount")
@@ -370,28 +374,30 @@ class TestUserDataVsphere(CiTestCase):
     def test_user_data_vsphere_success(self, m_mount_cb, m_find_devs_with):
         """Test user_data_vsphere() where successful."""
         m_find_devs_with.return_value = ["/dev/mock/cdrom"]
-        m_mount_cb.return_value = 'raw userdata from cdrom'
+        m_mount_cb.return_value = "raw userdata from cdrom"
         dsrc = dsac.DataSourceAltCloud({}, None, self.paths)
-        cloud_info = self.tmp_path('cloud-info', dir=self.tmp)
-        util.write_file(cloud_info, 'VSPHERE')
+        cloud_info = self.tmp_path("cloud-info", dir=self.tmp)
+        util.write_file(cloud_info, "VSPHERE")
         self.assertEqual(True, dsrc.user_data_vsphere())
-        m_find_devs_with.assert_called_once_with('LABEL=CDROM')
+        m_find_devs_with.assert_called_once_with("LABEL=CDROM")
         m_mount_cb.assert_called_once_with(
-            '/dev/mock/cdrom', dsac.read_user_data_callback)
-        with mock.patch.object(dsrc, 'get_cloud_type', return_value='VSPHERE'):
-            self.assertEqual('vsphere (/dev/mock/cdrom)', dsrc.subplatform)
+            "/dev/mock/cdrom", dsac.read_user_data_callback
+        )
+        with mock.patch.object(dsrc, "get_cloud_type", return_value="VSPHERE"):
+            self.assertEqual("vsphere (/dev/mock/cdrom)", dsrc.subplatform)
 
 
 class TestReadUserDataCallback(CiTestCase):
-    '''
+    """
     Test to exercise method: DataSourceAltCloud.read_user_data_callback()
-    '''
+    """
+
     def setUp(self):
-        '''Set up.'''
-        self.paths = helpers.Paths({'cloud_dir': '/tmp'})
+        """Set up."""
+        self.paths = helpers.Paths({"cloud_dir": "/tmp"})
         self.mount_dir = tempfile.mkdtemp()
 
-        _write_user_data_files(self.mount_dir, 'test user data')
+        _write_user_data_files(self.mount_dir, "test user data")
 
     def tearDown(self):
         # Reset
@@ -405,46 +411,49 @@ class TestReadUserDataCallback(CiTestCase):
             pass
 
     def test_callback_both(self):
-        '''Test read_user_data_callback() with both files.'''
+        """Test read_user_data_callback() with both files."""
 
-        self.assertEqual('test user data',
-                         dsac.read_user_data_callback(self.mount_dir))
+        self.assertEqual(
+            "test user data", dsac.read_user_data_callback(self.mount_dir)
+        )
 
     def test_callback_dc(self):
-        '''Test read_user_data_callback() with only DC file.'''
+        """Test read_user_data_callback() with only DC file."""
 
-        _remove_user_data_files(self.mount_dir,
-                                dc_file=False,
-                                non_dc_file=True)
+        _remove_user_data_files(
+            self.mount_dir, dc_file=False, non_dc_file=True
+        )
 
-        self.assertEqual('test user data',
-                         dsac.read_user_data_callback(self.mount_dir))
+        self.assertEqual(
+            "test user data", dsac.read_user_data_callback(self.mount_dir)
+        )
 
     def test_callback_non_dc(self):
-        '''Test read_user_data_callback() with only non-DC file.'''
+        """Test read_user_data_callback() with only non-DC file."""
 
-        _remove_user_data_files(self.mount_dir,
-                                dc_file=True,
-                                non_dc_file=False)
+        _remove_user_data_files(
+            self.mount_dir, dc_file=True, non_dc_file=False
+        )
 
-        self.assertEqual('test user data',
-                         dsac.read_user_data_callback(self.mount_dir))
+        self.assertEqual(
+            "test user data", dsac.read_user_data_callback(self.mount_dir)
+        )
 
     def test_callback_none(self):
-        '''Test read_user_data_callback() no files are found.'''
+        """Test read_user_data_callback() no files are found."""
 
         _remove_user_data_files(self.mount_dir)
         self.assertIsNone(dsac.read_user_data_callback(self.mount_dir))
 
 
 def force_arch(arch=None):
-
     def _os_uname():
-        return ('LINUX', 'NODENAME', 'RELEASE', 'VERSION', arch)
+        return ("LINUX", "NODENAME", "RELEASE", "VERSION", arch)
 
     if arch:
-        setattr(os, 'uname', _os_uname)
+        setattr(os, "uname", _os_uname)
     elif arch is None:
-        setattr(os, 'uname', OS_UNAME_ORIG)
+        setattr(os, "uname", OS_UNAME_ORIG)
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_azure.py b/tests/unittests/sources/test_azure.py
index ad8be04b..8b0762b7 100644
--- a/tests/unittests/sources/test_azure.py
+++ b/tests/unittests/sources/test_azure.py
@@ -1,33 +1,47 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import url_helper
-from cloudinit.sources import (
-    UNSET, DataSourceAzure as dsaz, InvalidMetaDataException)
-from cloudinit.util import (b64e, decode_binary, load_file, write_file,
-                            MountFailedError, json_dumps, load_json)
-from cloudinit.version import version_string as vs
-from tests.unittests.helpers import (
-    HttprettyTestCase, CiTestCase, populate_dir, mock, wrap_and_call,
-    ExitStack, resourceLocation)
-from cloudinit.sources.helpers import netlink
-
 import copy
 import crypt
-import httpretty
 import json
 import os
-import requests
 import stat
 import xml.etree.ElementTree as ET
-import yaml
 
+import httpretty
+import requests
+import yaml
 
-def construct_valid_ovf_env(data=None, pubkeys=None,
-                            userdata=None, platform_settings=None):
+from cloudinit import distros, helpers, url_helper
+from cloudinit.sources import UNSET
+from cloudinit.sources import DataSourceAzure as dsaz
+from cloudinit.sources import InvalidMetaDataException
+from cloudinit.sources.helpers import netlink
+from cloudinit.util import (
+    MountFailedError,
+    b64e,
+    decode_binary,
+    json_dumps,
+    load_file,
+    load_json,
+    write_file,
+)
+from cloudinit.version import version_string as vs
+from tests.unittests.helpers import (
+    CiTestCase,
+    ExitStack,
+    HttprettyTestCase,
+    mock,
+    populate_dir,
+    resourceLocation,
+    wrap_and_call,
+)
+
+
+def construct_valid_ovf_env(
+    data=None, pubkeys=None, userdata=None, platform_settings=None
+):
     if data is None:
-        data = {'HostName': 'FOOHOST'}
+        data = {"HostName": "FOOHOST"}
     if pubkeys is None:
         pubkeys = {}
 
@@ -45,9 +59,14 @@ def construct_valid_ovf_env(data=None, pubkeys=None,
     """
     for key, dval in data.items():
         if isinstance(dval, dict):
-            val = dict(dval).get('text')
-            attrs = ' ' + ' '.join(["%s='%s'" % (k, v) for k, v
-                                    in dict(dval).items() if k != 'text'])
+            val = dict(dval).get("text")
+            attrs = " " + " ".join(
+                [
+                    "%s='%s'" % (k, v)
+                    for k, v in dict(dval).items()
+                    if k != "text"
+                ]
+            )
         else:
             val = dval
             attrs = ""
@@ -61,8 +80,10 @@ def construct_valid_ovf_env(data=None, pubkeys=None,
         for fp, path, value in pubkeys:
             content += " <PublicKey>"
             if fp and path:
-                content += ("<Fingerprint>%s</Fingerprint><Path>%s</Path>" %
-                            (fp, path))
+                content += "<Fingerprint>%s</Fingerprint><Path>%s</Path>" % (
+                    fp,
+                    path,
+                )
             if value:
                 content += "<Value>%s</Value>" % value
             content += "</PublicKey>\n"
@@ -106,300 +127,331 @@ NETWORK_METADATA = {
         "vmScaleSetName": "",
         "vmSize": "Standard_DS1_v2",
         "zone": "",
-        "publicKeys": [
-            {
-                "keyData": "ssh-rsa key1",
-                "path": "path1"
-            }
-        ]
+        "publicKeys": [{"keyData": "ssh-rsa key1", "path": "path1"}],
     },
     "network": {
         "interface": [
             {
                 "macAddress": "000D3A047598",
-                "ipv6": {
-                    "ipAddress": []
-                },
+                "ipv6": {"ipAddress": []},
                 "ipv4": {
-                    "subnet": [
-                        {
-                            "prefix": "24",
-                            "address": "10.0.0.0"
-                        }
-                    ],
+                    "subnet": [{"prefix": "24", "address": "10.0.0.0"}],
                     "ipAddress": [
                         {
                             "privateIpAddress": "10.0.0.4",
-                            "publicIpAddress": "104.46.124.81"
+                            "publicIpAddress": "104.46.124.81",
                         }
-                    ]
-                }
+                    ],
+                },
             }
         ]
-    }
+    },
 }
 
 SECONDARY_INTERFACE = {
     "macAddress": "220D3A047598",
-    "ipv6": {
-        "ipAddress": []
-    },
+    "ipv6": {"ipAddress": []},
     "ipv4": {
-        "subnet": [
-            {
-                "prefix": "24",
-                "address": "10.0.1.0"
-            }
-        ],
+        "subnet": [{"prefix": "24", "address": "10.0.1.0"}],
         "ipAddress": [
             {
                 "privateIpAddress": "10.0.1.5",
             }
-        ]
-    }
+        ],
+    },
 }
 
 SECONDARY_INTERFACE_NO_IP = {
     "macAddress": "220D3A047598",
-    "ipv6": {
-        "ipAddress": []
-    },
+    "ipv6": {"ipAddress": []},
     "ipv4": {
-        "subnet": [
-            {
-                "prefix": "24",
-                "address": "10.0.1.0"
-            }
-        ],
-        "ipAddress": []
-    }
+        "subnet": [{"prefix": "24", "address": "10.0.1.0"}],
+        "ipAddress": [],
+    },
 }
 
 IMDS_NETWORK_METADATA = {
     "interface": [
         {
             "macAddress": "000D3A047598",
-            "ipv6": {
-                "ipAddress": []
-            },
+            "ipv6": {"ipAddress": []},
             "ipv4": {
-                "subnet": [
-                    {
-                        "prefix": "24",
-                        "address": "10.0.0.0"
-                    }
-                ],
+                "subnet": [{"prefix": "24", "address": "10.0.0.0"}],
                 "ipAddress": [
                     {
                         "privateIpAddress": "10.0.0.4",
-                        "publicIpAddress": "104.46.124.81"
+                        "publicIpAddress": "104.46.124.81",
                     }
-                ]
-            }
+                ],
+            },
         }
     ]
 }
 
-MOCKPATH = 'cloudinit.sources.DataSourceAzure.'
-EXAMPLE_UUID = 'd0df4c54-4ecb-4a4b-9954-5bdf3ed5c3b8'
+MOCKPATH = "cloudinit.sources.DataSourceAzure."
+EXAMPLE_UUID = "d0df4c54-4ecb-4a4b-9954-5bdf3ed5c3b8"
 
 
 class TestParseNetworkConfig(CiTestCase):
 
     maxDiff = None
     fallback_config = {
-        'version': 1,
-        'config': [{
-            'type': 'physical', 'name': 'eth0',
-            'mac_address': '00:11:22:33:44:55',
-            'params': {'driver': 'hv_netsvc'},
-            'subnets': [{'type': 'dhcp'}],
-        }]
+        "version": 1,
+        "config": [
+            {
+                "type": "physical",
+                "name": "eth0",
+                "mac_address": "00:11:22:33:44:55",
+                "params": {"driver": "hv_netsvc"},
+                "subnets": [{"type": "dhcp"}],
+            }
+        ],
     }
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_single_ipv4_nic_configuration(self, m_driver):
         """parse_network_config emits dhcp on single nic with ipv4"""
-        expected = {'ethernets': {
-            'eth0': {'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 100},
-                     'dhcp6': False,
-                     'match': {'macaddress': '00:0d:3a:04:75:98'},
-                     'set-name': 'eth0'}}, 'version': 2}
+        expected = {
+            "ethernets": {
+                "eth0": {
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": False,
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "set-name": "eth0",
+                }
+            },
+            "version": 2,
+        }
         self.assertEqual(expected, dsaz.parse_network_config(NETWORK_METADATA))
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_increases_route_metric_for_non_primary_nics(self, m_driver):
         """parse_network_config increases route-metric for each nic"""
-        expected = {'ethernets': {
-            'eth0': {'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 100},
-                     'dhcp6': False,
-                     'match': {'macaddress': '00:0d:3a:04:75:98'},
-                     'set-name': 'eth0'},
-            'eth1': {'set-name': 'eth1',
-                     'match': {'macaddress': '22:0d:3a:04:75:98'},
-                     'dhcp6': False,
-                     'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 200}},
-            'eth2': {'set-name': 'eth2',
-                     'match': {'macaddress': '33:0d:3a:04:75:98'},
-                     'dhcp6': False,
-                     'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 300}}}, 'version': 2}
+        expected = {
+            "ethernets": {
+                "eth0": {
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": False,
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "set-name": "eth0",
+                },
+                "eth1": {
+                    "set-name": "eth1",
+                    "match": {"macaddress": "22:0d:3a:04:75:98"},
+                    "dhcp6": False,
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 200},
+                },
+                "eth2": {
+                    "set-name": "eth2",
+                    "match": {"macaddress": "33:0d:3a:04:75:98"},
+                    "dhcp6": False,
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 300},
+                },
+            },
+            "version": 2,
+        }
         imds_data = copy.deepcopy(NETWORK_METADATA)
-        imds_data['network']['interface'].append(SECONDARY_INTERFACE)
+        imds_data["network"]["interface"].append(SECONDARY_INTERFACE)
         third_intf = copy.deepcopy(SECONDARY_INTERFACE)
-        third_intf['macAddress'] = third_intf['macAddress'].replace('22', '33')
-        third_intf['ipv4']['subnet'][0]['address'] = '10.0.2.0'
-        third_intf['ipv4']['ipAddress'][0]['privateIpAddress'] = '10.0.2.6'
-        imds_data['network']['interface'].append(third_intf)
+        third_intf["macAddress"] = third_intf["macAddress"].replace("22", "33")
+        third_intf["ipv4"]["subnet"][0]["address"] = "10.0.2.0"
+        third_intf["ipv4"]["ipAddress"][0]["privateIpAddress"] = "10.0.2.6"
+        imds_data["network"]["interface"].append(third_intf)
         self.assertEqual(expected, dsaz.parse_network_config(imds_data))
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_ipv4_and_ipv6_route_metrics_match_for_nics(self, m_driver):
         """parse_network_config emits matching ipv4 and ipv6 route-metrics."""
-        expected = {'ethernets': {
-            'eth0': {'addresses': ['10.0.0.5/24', '2001:dead:beef::2/128'],
-                     'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 100},
-                     'dhcp6': True,
-                     'dhcp6-overrides': {'route-metric': 100},
-                     'match': {'macaddress': '00:0d:3a:04:75:98'},
-                     'set-name': 'eth0'},
-            'eth1': {'set-name': 'eth1',
-                     'match': {'macaddress': '22:0d:3a:04:75:98'},
-                     'dhcp4': True,
-                     'dhcp6': False,
-                     'dhcp4-overrides': {'route-metric': 200}},
-            'eth2': {'set-name': 'eth2',
-                     'match': {'macaddress': '33:0d:3a:04:75:98'},
-                     'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 300},
-                     'dhcp6': True,
-                     'dhcp6-overrides': {'route-metric': 300}}}, 'version': 2}
+        expected = {
+            "ethernets": {
+                "eth0": {
+                    "addresses": ["10.0.0.5/24", "2001:dead:beef::2/128"],
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": True,
+                    "dhcp6-overrides": {"route-metric": 100},
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "set-name": "eth0",
+                },
+                "eth1": {
+                    "set-name": "eth1",
+                    "match": {"macaddress": "22:0d:3a:04:75:98"},
+                    "dhcp4": True,
+                    "dhcp6": False,
+                    "dhcp4-overrides": {"route-metric": 200},
+                },
+                "eth2": {
+                    "set-name": "eth2",
+                    "match": {"macaddress": "33:0d:3a:04:75:98"},
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 300},
+                    "dhcp6": True,
+                    "dhcp6-overrides": {"route-metric": 300},
+                },
+            },
+            "version": 2,
+        }
         imds_data = copy.deepcopy(NETWORK_METADATA)
-        nic1 = imds_data['network']['interface'][0]
-        nic1['ipv4']['ipAddress'].append({'privateIpAddress': '10.0.0.5'})
+        nic1 = imds_data["network"]["interface"][0]
+        nic1["ipv4"]["ipAddress"].append({"privateIpAddress": "10.0.0.5"})
 
-        nic1['ipv6'] = {
+        nic1["ipv6"] = {
             "subnet": [{"address": "2001:dead:beef::16"}],
-            "ipAddress": [{"privateIpAddress": "2001:dead:beef::1"},
-                          {"privateIpAddress": "2001:dead:beef::2"}]
+            "ipAddress": [
+                {"privateIpAddress": "2001:dead:beef::1"},
+                {"privateIpAddress": "2001:dead:beef::2"},
+            ],
         }
-        imds_data['network']['interface'].append(SECONDARY_INTERFACE)
+        imds_data["network"]["interface"].append(SECONDARY_INTERFACE)
         third_intf = copy.deepcopy(SECONDARY_INTERFACE)
-        third_intf['macAddress'] = third_intf['macAddress'].replace('22', '33')
-        third_intf['ipv4']['subnet'][0]['address'] = '10.0.2.0'
-        third_intf['ipv4']['ipAddress'][0]['privateIpAddress'] = '10.0.2.6'
-        third_intf['ipv6'] = {
+        third_intf["macAddress"] = third_intf["macAddress"].replace("22", "33")
+        third_intf["ipv4"]["subnet"][0]["address"] = "10.0.2.0"
+        third_intf["ipv4"]["ipAddress"][0]["privateIpAddress"] = "10.0.2.6"
+        third_intf["ipv6"] = {
             "subnet": [{"prefix": "64", "address": "2001:dead:beef::2"}],
-            "ipAddress": [{"privateIpAddress": "2001:dead:beef::1"}]
+            "ipAddress": [{"privateIpAddress": "2001:dead:beef::1"}],
         }
-        imds_data['network']['interface'].append(third_intf)
+        imds_data["network"]["interface"].append(third_intf)
         self.assertEqual(expected, dsaz.parse_network_config(imds_data))
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_ipv4_secondary_ips_will_be_static_addrs(self, m_driver):
         """parse_network_config emits primary ipv4 as dhcp others are static"""
-        expected = {'ethernets': {
-            'eth0': {'addresses': ['10.0.0.5/24'],
-                     'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 100},
-                     'dhcp6': True,
-                     'dhcp6-overrides': {'route-metric': 100},
-                     'match': {'macaddress': '00:0d:3a:04:75:98'},
-                     'set-name': 'eth0'}}, 'version': 2}
+        expected = {
+            "ethernets": {
+                "eth0": {
+                    "addresses": ["10.0.0.5/24"],
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": True,
+                    "dhcp6-overrides": {"route-metric": 100},
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "set-name": "eth0",
+                }
+            },
+            "version": 2,
+        }
         imds_data = copy.deepcopy(NETWORK_METADATA)
-        nic1 = imds_data['network']['interface'][0]
-        nic1['ipv4']['ipAddress'].append({'privateIpAddress': '10.0.0.5'})
+        nic1 = imds_data["network"]["interface"][0]
+        nic1["ipv4"]["ipAddress"].append({"privateIpAddress": "10.0.0.5"})
 
-        nic1['ipv6'] = {
+        nic1["ipv6"] = {
             "subnet": [{"prefix": "10", "address": "2001:dead:beef::16"}],
-            "ipAddress": [{"privateIpAddress": "2001:dead:beef::1"}]
+            "ipAddress": [{"privateIpAddress": "2001:dead:beef::1"}],
         }
         self.assertEqual(expected, dsaz.parse_network_config(imds_data))
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_ipv6_secondary_ips_will_be_static_cidrs(self, m_driver):
         """parse_network_config emits primary ipv6 as dhcp others are static"""
-        expected = {'ethernets': {
-            'eth0': {'addresses': ['10.0.0.5/24', '2001:dead:beef::2/10'],
-                     'dhcp4': True,
-                     'dhcp4-overrides': {'route-metric': 100},
-                     'dhcp6': True,
-                     'dhcp6-overrides': {'route-metric': 100},
-                     'match': {'macaddress': '00:0d:3a:04:75:98'},
-                     'set-name': 'eth0'}}, 'version': 2}
+        expected = {
+            "ethernets": {
+                "eth0": {
+                    "addresses": ["10.0.0.5/24", "2001:dead:beef::2/10"],
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": True,
+                    "dhcp6-overrides": {"route-metric": 100},
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "set-name": "eth0",
+                }
+            },
+            "version": 2,
+        }
         imds_data = copy.deepcopy(NETWORK_METADATA)
-        nic1 = imds_data['network']['interface'][0]
-        nic1['ipv4']['ipAddress'].append({'privateIpAddress': '10.0.0.5'})
+        nic1 = imds_data["network"]["interface"][0]
+        nic1["ipv4"]["ipAddress"].append({"privateIpAddress": "10.0.0.5"})
 
         # Secondary ipv6 addresses currently ignored/unconfigured
-        nic1['ipv6'] = {
+        nic1["ipv6"] = {
             "subnet": [{"prefix": "10", "address": "2001:dead:beef::16"}],
-            "ipAddress": [{"privateIpAddress": "2001:dead:beef::1"},
-                          {"privateIpAddress": "2001:dead:beef::2"}]
+            "ipAddress": [
+                {"privateIpAddress": "2001:dead:beef::1"},
+                {"privateIpAddress": "2001:dead:beef::2"},
+            ],
         }
         self.assertEqual(expected, dsaz.parse_network_config(imds_data))
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value='hv_netvsc')
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver",
+        return_value="hv_netvsc",
+    )
     def test_match_driver_for_netvsc(self, m_driver):
         """parse_network_config emits driver when using netvsc."""
-        expected = {'ethernets': {
-            'eth0': {
-                'dhcp4': True,
-                'dhcp4-overrides': {'route-metric': 100},
-                'dhcp6': False,
-                'match': {
-                    'macaddress': '00:0d:3a:04:75:98',
-                    'driver': 'hv_netvsc',
-                },
-                'set-name': 'eth0'
-            }}, 'version': 2}
+        expected = {
+            "ethernets": {
+                "eth0": {
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": False,
+                    "match": {
+                        "macaddress": "00:0d:3a:04:75:98",
+                        "driver": "hv_netvsc",
+                    },
+                    "set-name": "eth0",
+                }
+            },
+            "version": 2,
+        }
         self.assertEqual(expected, dsaz.parse_network_config(NETWORK_METADATA))
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
-    @mock.patch('cloudinit.net.generate_fallback_config')
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
+    @mock.patch("cloudinit.net.generate_fallback_config")
     def test_parse_network_config_uses_fallback_cfg_when_no_network_metadata(
-            self, m_fallback_config, m_driver):
+        self, m_fallback_config, m_driver
+    ):
         """parse_network_config generates fallback network config when the
         IMDS instance metadata is corrupted/invalid, such as when
         network metadata is not present.
         """
         imds_metadata_missing_network_metadata = copy.deepcopy(
-            NETWORK_METADATA)
-        del imds_metadata_missing_network_metadata['network']
+            NETWORK_METADATA
+        )
+        del imds_metadata_missing_network_metadata["network"]
         m_fallback_config.return_value = self.fallback_config
         self.assertEqual(
             self.fallback_config,
-            dsaz.parse_network_config(
-                imds_metadata_missing_network_metadata))
+            dsaz.parse_network_config(imds_metadata_missing_network_metadata),
+        )
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
-    @mock.patch('cloudinit.net.generate_fallback_config')
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
+    @mock.patch("cloudinit.net.generate_fallback_config")
     def test_parse_network_config_uses_fallback_cfg_when_no_interface_metadata(
-            self, m_fallback_config, m_driver):
+        self, m_fallback_config, m_driver
+    ):
         """parse_network_config generates fallback network config when the
         IMDS instance metadata is corrupted/invalid, such as when
         network interface metadata is not present.
         """
         imds_metadata_missing_interface_metadata = copy.deepcopy(
-            NETWORK_METADATA)
-        del imds_metadata_missing_interface_metadata['network']['interface']
+            NETWORK_METADATA
+        )
+        del imds_metadata_missing_interface_metadata["network"]["interface"]
         m_fallback_config.return_value = self.fallback_config
         self.assertEqual(
             self.fallback_config,
             dsaz.parse_network_config(
-                imds_metadata_missing_interface_metadata))
+                imds_metadata_missing_interface_metadata
+            ),
+        )
 
 
 class TestGetMetadataFromIMDS(HttprettyTestCase):
@@ -412,175 +464,218 @@ class TestGetMetadataFromIMDS(HttprettyTestCase):
             dsaz.IMDS_URL
         )
 
-    @mock.patch(MOCKPATH + 'readurl')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4', autospec=True)
-    @mock.patch(MOCKPATH + 'net.is_up', autospec=True)
+    @mock.patch(MOCKPATH + "readurl")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4", autospec=True)
+    @mock.patch(MOCKPATH + "net.is_up", autospec=True)
     def test_get_metadata_does_not_dhcp_if_network_is_up(
-            self, m_net_is_up, m_dhcp, m_readurl):
+        self, m_net_is_up, m_dhcp, m_readurl
+    ):
         """Do not perform DHCP setup when nic is already up."""
         m_net_is_up.return_value = True
         m_readurl.return_value = url_helper.StringResponse(
-            json.dumps(NETWORK_METADATA).encode('utf-8'))
+            json.dumps(NETWORK_METADATA).encode("utf-8")
+        )
         self.assertEqual(
-            NETWORK_METADATA,
-            dsaz.get_metadata_from_imds('eth9', retries=3))
+            NETWORK_METADATA, dsaz.get_metadata_from_imds("eth9", retries=3)
+        )
 
-        m_net_is_up.assert_called_with('eth9')
+        m_net_is_up.assert_called_with("eth9")
         m_dhcp.assert_not_called()
         self.assertIn(
             "Crawl of Azure Instance Metadata Service (IMDS) took",  # log_time
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch(MOCKPATH + 'readurl', autospec=True)
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
-    @mock.patch(MOCKPATH + 'net.is_up')
+    @mock.patch(MOCKPATH + "readurl", autospec=True)
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
+    @mock.patch(MOCKPATH + "net.is_up")
     def test_get_metadata_uses_instance_url(
-            self, m_net_is_up, m_dhcp, m_readurl):
+        self, m_net_is_up, m_dhcp, m_readurl
+    ):
         """Make sure readurl is called with the correct url when accessing
         metadata"""
         m_net_is_up.return_value = True
         m_readurl.return_value = url_helper.StringResponse(
-            json.dumps(IMDS_NETWORK_METADATA).encode('utf-8'))
+            json.dumps(IMDS_NETWORK_METADATA).encode("utf-8")
+        )
 
         dsaz.get_metadata_from_imds(
-            'eth0', retries=3, md_type=dsaz.metadata_type.all)
+            "eth0", retries=3, md_type=dsaz.metadata_type.all
+        )
         m_readurl.assert_called_with(
-            "http://169.254.169.254/metadata/instance?api-version="
-            "2019-06-01", exception_cb=mock.ANY,
-            headers=mock.ANY, retries=mock.ANY,
-            timeout=mock.ANY, infinite=False)
+            "http://169.254.169.254/metadata/instance?api-version=2019-06-01",
+            exception_cb=mock.ANY,
+            headers=mock.ANY,
+            retries=mock.ANY,
+            timeout=mock.ANY,
+            infinite=False,
+        )
 
-    @mock.patch(MOCKPATH + 'readurl', autospec=True)
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
-    @mock.patch(MOCKPATH + 'net.is_up')
+    @mock.patch(MOCKPATH + "readurl", autospec=True)
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
+    @mock.patch(MOCKPATH + "net.is_up")
     def test_get_network_metadata_uses_network_url(
-            self, m_net_is_up, m_dhcp, m_readurl):
+        self, m_net_is_up, m_dhcp, m_readurl
+    ):
         """Make sure readurl is called with the correct url when accessing
         network metadata"""
         m_net_is_up.return_value = True
         m_readurl.return_value = url_helper.StringResponse(
-            json.dumps(IMDS_NETWORK_METADATA).encode('utf-8'))
+            json.dumps(IMDS_NETWORK_METADATA).encode("utf-8")
+        )
 
         dsaz.get_metadata_from_imds(
-            'eth0', retries=3, md_type=dsaz.metadata_type.network)
+            "eth0", retries=3, md_type=dsaz.metadata_type.network
+        )
         m_readurl.assert_called_with(
             "http://169.254.169.254/metadata/instance/network?api-version="
-            "2019-06-01", exception_cb=mock.ANY,
-            headers=mock.ANY, retries=mock.ANY,
-            timeout=mock.ANY, infinite=False)
+            "2019-06-01",
+            exception_cb=mock.ANY,
+            headers=mock.ANY,
+            retries=mock.ANY,
+            timeout=mock.ANY,
+            infinite=False,
+        )
 
-    @mock.patch(MOCKPATH + 'readurl', autospec=True)
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
-    @mock.patch(MOCKPATH + 'net.is_up')
+    @mock.patch(MOCKPATH + "readurl", autospec=True)
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
+    @mock.patch(MOCKPATH + "net.is_up")
     def test_get_default_metadata_uses_instance_url(
-            self, m_net_is_up, m_dhcp, m_readurl):
+        self, m_net_is_up, m_dhcp, m_readurl
+    ):
         """Make sure readurl is called with the correct url when accessing
         metadata"""
         m_net_is_up.return_value = True
         m_readurl.return_value = url_helper.StringResponse(
-            json.dumps(IMDS_NETWORK_METADATA).encode('utf-8'))
+            json.dumps(IMDS_NETWORK_METADATA).encode("utf-8")
+        )
 
-        dsaz.get_metadata_from_imds(
-            'eth0', retries=3)
+        dsaz.get_metadata_from_imds("eth0", retries=3)
         m_readurl.assert_called_with(
-            "http://169.254.169.254/metadata/instance?api-version="
-            "2019-06-01", exception_cb=mock.ANY,
-            headers=mock.ANY, retries=mock.ANY,
-            timeout=mock.ANY, infinite=False)
+            "http://169.254.169.254/metadata/instance?api-version=2019-06-01",
+            exception_cb=mock.ANY,
+            headers=mock.ANY,
+            retries=mock.ANY,
+            timeout=mock.ANY,
+            infinite=False,
+        )
 
-    @mock.patch(MOCKPATH + 'readurl', autospec=True)
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
-    @mock.patch(MOCKPATH + 'net.is_up')
+    @mock.patch(MOCKPATH + "readurl", autospec=True)
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
+    @mock.patch(MOCKPATH + "net.is_up")
     def test_get_metadata_uses_extended_url(
-            self, m_net_is_up, m_dhcp, m_readurl):
+        self, m_net_is_up, m_dhcp, m_readurl
+    ):
         """Make sure readurl is called with the correct url when accessing
         metadata"""
         m_net_is_up.return_value = True
         m_readurl.return_value = url_helper.StringResponse(
-            json.dumps(IMDS_NETWORK_METADATA).encode('utf-8'))
+            json.dumps(IMDS_NETWORK_METADATA).encode("utf-8")
+        )
 
         dsaz.get_metadata_from_imds(
-            'eth0', retries=3, md_type=dsaz.metadata_type.all,
-            api_version="2021-08-01")
+            "eth0",
+            retries=3,
+            md_type=dsaz.metadata_type.all,
+            api_version="2021-08-01",
+        )
         m_readurl.assert_called_with(
             "http://169.254.169.254/metadata/instance?api-version="
-            "2021-08-01&extended=true", exception_cb=mock.ANY,
-            headers=mock.ANY, retries=mock.ANY,
-            timeout=mock.ANY, infinite=False)
+            "2021-08-01&extended=true",
+            exception_cb=mock.ANY,
+            headers=mock.ANY,
+            retries=mock.ANY,
+            timeout=mock.ANY,
+            infinite=False,
+        )
 
-    @mock.patch(MOCKPATH + 'readurl', autospec=True)
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4WithReporting', autospec=True)
-    @mock.patch(MOCKPATH + 'net.is_up', autospec=True)
+    @mock.patch(MOCKPATH + "readurl", autospec=True)
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4WithReporting", autospec=True)
+    @mock.patch(MOCKPATH + "net.is_up", autospec=True)
     def test_get_metadata_performs_dhcp_when_network_is_down(
-            self, m_net_is_up, m_dhcp, m_readurl):
+        self, m_net_is_up, m_dhcp, m_readurl
+    ):
         """Perform DHCP setup when nic is not up."""
         m_net_is_up.return_value = False
         m_readurl.return_value = url_helper.StringResponse(
-            json.dumps(NETWORK_METADATA).encode('utf-8'))
+            json.dumps(NETWORK_METADATA).encode("utf-8")
+        )
 
         self.assertEqual(
-            NETWORK_METADATA,
-            dsaz.get_metadata_from_imds('eth9', retries=2))
+            NETWORK_METADATA, dsaz.get_metadata_from_imds("eth9", retries=2)
+        )
 
-        m_net_is_up.assert_called_with('eth9')
-        m_dhcp.assert_called_with(mock.ANY, 'eth9')
+        m_net_is_up.assert_called_with("eth9")
+        m_dhcp.assert_called_with(mock.ANY, "eth9")
         self.assertIn(
             "Crawl of Azure Instance Metadata Service (IMDS) took",  # log_time
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
         m_readurl.assert_called_with(
-            self.network_md_url, exception_cb=mock.ANY,
-            headers={'Metadata': 'true'}, retries=2,
-            timeout=dsaz.IMDS_TIMEOUT_IN_SECONDS, infinite=False)
+            self.network_md_url,
+            exception_cb=mock.ANY,
+            headers={"Metadata": "true"},
+            retries=2,
+            timeout=dsaz.IMDS_TIMEOUT_IN_SECONDS,
+            infinite=False,
+        )
 
-    @mock.patch('cloudinit.url_helper.time.sleep')
-    @mock.patch(MOCKPATH + 'net.is_up', autospec=True)
+    @mock.patch("cloudinit.url_helper.time.sleep")
+    @mock.patch(MOCKPATH + "net.is_up", autospec=True)
     def test_get_metadata_from_imds_empty_when_no_imds_present(
-            self, m_net_is_up, m_sleep):
+        self, m_net_is_up, m_sleep
+    ):
         """Return empty dict when IMDS network metadata is absent."""
         httpretty.register_uri(
             httpretty.GET,
-            dsaz.IMDS_URL + '/instance?api-version=2017-12-01',
-            body={}, status=404)
+            dsaz.IMDS_URL + "/instance?api-version=2017-12-01",
+            body={},
+            status=404,
+        )
 
         m_net_is_up.return_value = True  # skips dhcp
 
-        self.assertEqual({}, dsaz.get_metadata_from_imds('eth9', retries=2))
+        self.assertEqual({}, dsaz.get_metadata_from_imds("eth9", retries=2))
 
-        m_net_is_up.assert_called_with('eth9')
+        m_net_is_up.assert_called_with("eth9")
         self.assertEqual([mock.call(1), mock.call(1)], m_sleep.call_args_list)
         self.assertIn(
             "Crawl of Azure Instance Metadata Service (IMDS) took",  # log_time
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('requests.Session.request')
-    @mock.patch('cloudinit.url_helper.time.sleep')
-    @mock.patch(MOCKPATH + 'net.is_up', autospec=True)
+    @mock.patch("requests.Session.request")
+    @mock.patch("cloudinit.url_helper.time.sleep")
+    @mock.patch(MOCKPATH + "net.is_up", autospec=True)
     def test_get_metadata_from_imds_retries_on_timeout(
-            self, m_net_is_up, m_sleep, m_request):
+        self, m_net_is_up, m_sleep, m_request
+    ):
         """Retry IMDS network metadata on timeout errors."""
 
         self.attempt = 0
-        m_request.side_effect = requests.Timeout('Fake Connection Timeout')
+        m_request.side_effect = requests.Timeout("Fake Connection Timeout")
 
         def retry_callback(request, uri, headers):
             self.attempt += 1
-            raise requests.Timeout('Fake connection timeout')
+            raise requests.Timeout("Fake connection timeout")
 
         httpretty.register_uri(
             httpretty.GET,
-            dsaz.IMDS_URL + 'instance?api-version=2017-12-01',
-            body=retry_callback)
+            dsaz.IMDS_URL + "instance?api-version=2017-12-01",
+            body=retry_callback,
+        )
 
         m_net_is_up.return_value = True  # skips dhcp
 
-        self.assertEqual({}, dsaz.get_metadata_from_imds('eth9', retries=3))
+        self.assertEqual({}, dsaz.get_metadata_from_imds("eth9", retries=3))
 
-        m_net_is_up.assert_called_with('eth9')
-        self.assertEqual([mock.call(1)]*3, m_sleep.call_args_list)
+        m_net_is_up.assert_called_with("eth9")
+        self.assertEqual([mock.call(1)] * 3, m_sleep.call_args_list)
         self.assertIn(
             "Crawl of Azure Instance Metadata Service (IMDS) took",  # log_time
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
 
 class TestAzureDataSource(CiTestCase):
@@ -593,25 +688,35 @@ class TestAzureDataSource(CiTestCase):
 
         # patch cloud_dir, so our 'seed_dir' is guaranteed empty
         self.paths = helpers.Paths(
-            {'cloud_dir': self.tmp, 'run_dir': self.tmp})
-        self.waagent_d = os.path.join(self.tmp, 'var', 'lib', 'waagent')
+            {"cloud_dir": self.tmp, "run_dir": self.tmp}
+        )
+        self.waagent_d = os.path.join(self.tmp, "var", "lib", "waagent")
 
         self.patches = ExitStack()
         self.addCleanup(self.patches.close)
 
-        self.patches.enter_context(mock.patch.object(
-            dsaz, '_get_random_seed', return_value='wild'))
+        self.patches.enter_context(
+            mock.patch.object(dsaz, "_get_random_seed", return_value="wild")
+        )
         self.m_get_metadata_from_imds = self.patches.enter_context(
             mock.patch.object(
-                dsaz, 'get_metadata_from_imds',
-                mock.MagicMock(return_value=NETWORK_METADATA)))
+                dsaz,
+                "get_metadata_from_imds",
+                mock.MagicMock(return_value=NETWORK_METADATA),
+            )
+        )
         self.m_fallback_nic = self.patches.enter_context(
-            mock.patch('cloudinit.sources.net.find_fallback_nic',
-                       return_value='eth9'))
+            mock.patch(
+                "cloudinit.sources.net.find_fallback_nic", return_value="eth9"
+            )
+        )
         self.m_remove_ubuntu_network_scripts = self.patches.enter_context(
             mock.patch.object(
-                dsaz, 'maybe_remove_ubuntu_network_config_scripts',
-                mock.MagicMock()))
+                dsaz,
+                "maybe_remove_ubuntu_network_config_scripts",
+                mock.MagicMock(),
+            )
+        )
         super(TestAzureDataSource, self).setUp()
 
     def apply_patches(self, patches):
@@ -619,15 +724,21 @@ class TestAzureDataSource(CiTestCase):
             self.patches.enter_context(mock.patch.object(module, name, new))
 
     def _get_mockds(self):
-        sysctl_out = "dev.storvsc.3.%pnpinfo: "\
-                     "classid=ba6163d9-04a1-4d29-b605-72e2ffb1dc7f "\
-                     "deviceid=f8b3781b-1e82-4818-a1c3-63d806ec15bb\n"
-        sysctl_out += "dev.storvsc.2.%pnpinfo: "\
-                      "classid=ba6163d9-04a1-4d29-b605-72e2ffb1dc7f "\
-                      "deviceid=f8b3781a-1e82-4818-a1c3-63d806ec15bb\n"
-        sysctl_out += "dev.storvsc.1.%pnpinfo: "\
-                      "classid=32412632-86cb-44a2-9b5c-50d1417354f5 "\
-                      "deviceid=00000000-0001-8899-0000-000000000000\n"
+        sysctl_out = (
+            "dev.storvsc.3.%pnpinfo: "
+            "classid=ba6163d9-04a1-4d29-b605-72e2ffb1dc7f "
+            "deviceid=f8b3781b-1e82-4818-a1c3-63d806ec15bb\n"
+        )
+        sysctl_out += (
+            "dev.storvsc.2.%pnpinfo: "
+            "classid=ba6163d9-04a1-4d29-b605-72e2ffb1dc7f "
+            "deviceid=f8b3781a-1e82-4818-a1c3-63d806ec15bb\n"
+        )
+        sysctl_out += (
+            "dev.storvsc.1.%pnpinfo: "
+            "classid=32412632-86cb-44a2-9b5c-50d1417354f5 "
+            "deviceid=00000000-0001-8899-0000-000000000000\n"
+        )
         camctl_devbus = """
 scbus0 on ata0 bus 0
 scbus1 on ata1 bus 0
@@ -642,45 +753,57 @@ scbus-1 on xpt0 bus 0
 <Msft Virtual Disk 1.0>            at scbus2 target 0 lun 0 (da0,pass1)
 <Msft Virtual Disk 1.0>            at scbus3 target 1 lun 0 (da1,pass2)
         """
-        self.apply_patches([
-            (dsaz, 'get_dev_storvsc_sysctl', mock.MagicMock(
-                return_value=sysctl_out)),
-            (dsaz, 'get_camcontrol_dev_bus', mock.MagicMock(
-                return_value=camctl_devbus)),
-            (dsaz, 'get_camcontrol_dev', mock.MagicMock(
-                return_value=camctl_dev))
-        ])
+        self.apply_patches(
+            [
+                (
+                    dsaz,
+                    "get_dev_storvsc_sysctl",
+                    mock.MagicMock(return_value=sysctl_out),
+                ),
+                (
+                    dsaz,
+                    "get_camcontrol_dev_bus",
+                    mock.MagicMock(return_value=camctl_devbus),
+                ),
+                (
+                    dsaz,
+                    "get_camcontrol_dev",
+                    mock.MagicMock(return_value=camctl_dev),
+                ),
+            ]
+        )
         return dsaz
 
-    def _get_ds(self, data, distro='ubuntu',
-                apply_network=None, instance_id=None):
-
+    def _get_ds(
+        self, data, distro="ubuntu", apply_network=None, instance_id=None
+    ):
         def _wait_for_files(flist, _maxwait=None, _naplen=None):
-            data['waited'] = flist
+            data["waited"] = flist
             return []
 
         def _load_possible_azure_ds(seed_dir, cache_dir):
             yield seed_dir
             yield dsaz.DEFAULT_PROVISIONING_ISO_DEV
-            yield from data.get('dsdevs', [])
+            yield from data.get("dsdevs", [])
             if cache_dir:
                 yield cache_dir
 
         seed_dir = os.path.join(self.paths.seed_dir, "azure")
-        if data.get('ovfcontent') is not None:
-            populate_dir(seed_dir,
-                         {'ovf-env.xml': data['ovfcontent']})
+        if data.get("ovfcontent") is not None:
+            populate_dir(seed_dir, {"ovf-env.xml": data["ovfcontent"]})
 
-        dsaz.BUILTIN_DS_CONFIG['data_dir'] = self.waagent_d
+        dsaz.BUILTIN_DS_CONFIG["data_dir"] = self.waagent_d
 
         self.m_is_platform_viable = mock.MagicMock(autospec=True)
         self.m_get_metadata_from_fabric = mock.MagicMock(
-            return_value={'public-keys': []})
+            return_value={"public-keys": []}
+        )
         self.m_report_failure_to_fabric = mock.MagicMock(autospec=True)
         self.m_ephemeral_dhcpv4 = mock.MagicMock()
         self.m_ephemeral_dhcpv4_with_reporting = mock.MagicMock()
         self.m_list_possible_azure_ds = mock.MagicMock(
-            side_effect=_load_possible_azure_ds)
+            side_effect=_load_possible_azure_ds
+        )
 
         if instance_id:
             self.instance_id = instance_id
@@ -688,39 +811,59 @@ scbus-1 on xpt0 bus 0
             self.instance_id = EXAMPLE_UUID
 
         def _dmi_mocks(key):
-            if key == 'system-uuid':
+            if key == "system-uuid":
                 return self.instance_id
-            elif key == 'chassis-asset-tag':
-                return '7783-7084-3265-9085-8269-3286-77'
-
-        self.apply_patches([
-            (dsaz, 'list_possible_azure_ds',
-                self.m_list_possible_azure_ds),
-            (dsaz, '_is_platform_viable',
-                self.m_is_platform_viable),
-            (dsaz, 'get_metadata_from_fabric',
-                self.m_get_metadata_from_fabric),
-            (dsaz, 'report_failure_to_fabric',
-                self.m_report_failure_to_fabric),
-            (dsaz, 'EphemeralDHCPv4', self.m_ephemeral_dhcpv4),
-            (dsaz, 'EphemeralDHCPv4WithReporting',
-                self.m_ephemeral_dhcpv4_with_reporting),
-            (dsaz, 'get_boot_telemetry', mock.MagicMock()),
-            (dsaz, 'get_system_info', mock.MagicMock()),
-            (dsaz.subp, 'which', lambda x: True),
-            (dsaz.dmi, 'read_dmi_data', mock.MagicMock(
-                side_effect=_dmi_mocks)),
-            (dsaz.util, 'wait_for_files', mock.MagicMock(
-                side_effect=_wait_for_files)),
-        ])
+            elif key == "chassis-asset-tag":
+                return "7783-7084-3265-9085-8269-3286-77"
+
+        self.apply_patches(
+            [
+                (
+                    dsaz,
+                    "list_possible_azure_ds",
+                    self.m_list_possible_azure_ds,
+                ),
+                (dsaz, "_is_platform_viable", self.m_is_platform_viable),
+                (
+                    dsaz,
+                    "get_metadata_from_fabric",
+                    self.m_get_metadata_from_fabric,
+                ),
+                (
+                    dsaz,
+                    "report_failure_to_fabric",
+                    self.m_report_failure_to_fabric,
+                ),
+                (dsaz, "EphemeralDHCPv4", self.m_ephemeral_dhcpv4),
+                (
+                    dsaz,
+                    "EphemeralDHCPv4WithReporting",
+                    self.m_ephemeral_dhcpv4_with_reporting,
+                ),
+                (dsaz, "get_boot_telemetry", mock.MagicMock()),
+                (dsaz, "get_system_info", mock.MagicMock()),
+                (dsaz.subp, "which", lambda x: True),
+                (
+                    dsaz.dmi,
+                    "read_dmi_data",
+                    mock.MagicMock(side_effect=_dmi_mocks),
+                ),
+                (
+                    dsaz.util,
+                    "wait_for_files",
+                    mock.MagicMock(side_effect=_wait_for_files),
+                ),
+            ]
+        )
 
         if isinstance(distro, str):
             distro_cls = distros.fetch(distro)
-            distro = distro_cls(distro, data.get('sys_cfg', {}), self.paths)
+            distro = distro_cls(distro, data.get("sys_cfg", {}), self.paths)
         dsrc = dsaz.DataSourceAzure(
-            data.get('sys_cfg', {}), distro=distro, paths=self.paths)
+            data.get("sys_cfg", {}), distro=distro, paths=self.paths
+        )
         if apply_network is not None:
-            dsrc.ds_cfg['apply_network_config'] = apply_network
+            dsrc.ds_cfg["apply_network_config"] = apply_network
 
         return dsrc
 
@@ -774,19 +917,18 @@ scbus-1 on xpt0 bus 0
         data = {}
         dsrc = self._get_ds(data)
         self.m_is_platform_viable.return_value = False
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata, \
-                mock.patch.object(dsrc, '_report_failure') as m_report_failure:
+        with mock.patch.object(
+            dsrc, "crawl_metadata"
+        ) as m_crawl_metadata, mock.patch.object(
+            dsrc, "_report_failure"
+        ) as m_report_failure:
             ret = dsrc.get_data()
             self.m_is_platform_viable.assert_called_with(dsrc.seed_dir)
             self.assertFalse(ret)
             # Assert that for non viable platforms,
             # there is no communication with the Azure datasource.
-            self.assertEqual(
-                0,
-                m_crawl_metadata.call_count)
-            self.assertEqual(
-                0,
-                m_report_failure.call_count)
+            self.assertEqual(0, m_crawl_metadata.call_count)
+            self.assertEqual(0, m_report_failure.call_count)
 
     def test_platform_viable_but_no_devs_should_return_no_datasource(self):
         """For platforms where the Azure platform is viable
@@ -797,170 +939,190 @@ scbus-1 on xpt0 bus 0
         """
         data = {}
         dsrc = self._get_ds(data)
-        with mock.patch.object(dsrc, '_report_failure') as m_report_failure:
+        with mock.patch.object(dsrc, "_report_failure") as m_report_failure:
             self.m_is_platform_viable.return_value = True
             ret = dsrc.get_data()
             self.m_is_platform_viable.assert_called_with(dsrc.seed_dir)
             self.assertFalse(ret)
-            self.assertEqual(
-                1,
-                m_report_failure.call_count)
+            self.assertEqual(1, m_report_failure.call_count)
 
     def test_crawl_metadata_exception_returns_no_datasource(self):
         data = {}
         dsrc = self._get_ds(data)
         self.m_is_platform_viable.return_value = True
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata:
+        with mock.patch.object(dsrc, "crawl_metadata") as m_crawl_metadata:
             m_crawl_metadata.side_effect = Exception
             ret = dsrc.get_data()
             self.m_is_platform_viable.assert_called_with(dsrc.seed_dir)
-            self.assertEqual(
-                1,
-                m_crawl_metadata.call_count)
+            self.assertEqual(1, m_crawl_metadata.call_count)
             self.assertFalse(ret)
 
     def test_crawl_metadata_exception_should_report_failure_with_msg(self):
         data = {}
         dsrc = self._get_ds(data)
         self.m_is_platform_viable.return_value = True
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata, \
-                mock.patch.object(dsrc, '_report_failure') as m_report_failure:
+        with mock.patch.object(
+            dsrc, "crawl_metadata"
+        ) as m_crawl_metadata, mock.patch.object(
+            dsrc, "_report_failure"
+        ) as m_report_failure:
             m_crawl_metadata.side_effect = Exception
             dsrc.get_data()
-            self.assertEqual(
-                1,
-                m_crawl_metadata.call_count)
+            self.assertEqual(1, m_crawl_metadata.call_count)
             m_report_failure.assert_called_once_with(
-                description=dsaz.DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE)
+                description=dsaz.DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE
+            )
 
     def test_crawl_metadata_exc_should_log_could_not_crawl_msg(self):
         data = {}
         dsrc = self._get_ds(data)
         self.m_is_platform_viable.return_value = True
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata:
+        with mock.patch.object(dsrc, "crawl_metadata") as m_crawl_metadata:
             m_crawl_metadata.side_effect = Exception
             dsrc.get_data()
-            self.assertEqual(
-                1,
-                m_crawl_metadata.call_count)
+            self.assertEqual(1, m_crawl_metadata.call_count)
             self.assertIn(
-                "Could not crawl Azure metadata",
-                self.logs.getvalue())
+                "Could not crawl Azure metadata", self.logs.getvalue()
+            )
 
     def test_basic_seed_dir(self):
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': {}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": {},
+        }
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
         self.assertEqual(dsrc.userdata_raw, "")
-        self.assertEqual(dsrc.metadata['local-hostname'], odata['HostName'])
-        self.assertTrue(os.path.isfile(
-            os.path.join(self.waagent_d, 'ovf-env.xml')))
-        self.assertEqual('azure', dsrc.cloud_name)
-        self.assertEqual('azure', dsrc.platform_type)
+        self.assertEqual(dsrc.metadata["local-hostname"], odata["HostName"])
+        self.assertTrue(
+            os.path.isfile(os.path.join(self.waagent_d, "ovf-env.xml"))
+        )
+        self.assertEqual("azure", dsrc.cloud_name)
+        self.assertEqual("azure", dsrc.platform_type)
         self.assertEqual(
-            'seed-dir (%s/seed/azure)' % self.tmp, dsrc.subplatform)
+            "seed-dir (%s/seed/azure)" % self.tmp, dsrc.subplatform
+        )
 
     def test_basic_dev_file(self):
         """When a device path is used, present that in subplatform."""
-        data = {'sys_cfg': {}, 'dsdevs': ['/dev/cd0']}
+        data = {"sys_cfg": {}, "dsdevs": ["/dev/cd0"]}
         dsrc = self._get_ds(data)
         # DSAzure will attempt to mount /dev/sr0 first, which should
         # fail with mount error since the list of devices doesn't have
         # /dev/sr0
-        with mock.patch(MOCKPATH + 'util.mount_cb') as m_mount_cb:
+        with mock.patch(MOCKPATH + "util.mount_cb") as m_mount_cb:
             m_mount_cb.side_effect = [
                 MountFailedError("fail"),
-                ({'local-hostname': 'me'}, 'ud', {'cfg': ''}, {})
+                ({"local-hostname": "me"}, "ud", {"cfg": ""}, {}),
             ]
             self.assertTrue(dsrc.get_data())
-        self.assertEqual(dsrc.userdata_raw, 'ud')
-        self.assertEqual(dsrc.metadata['local-hostname'], 'me')
-        self.assertEqual('azure', dsrc.cloud_name)
-        self.assertEqual('azure', dsrc.platform_type)
-        self.assertEqual('config-disk (/dev/cd0)', dsrc.subplatform)
+        self.assertEqual(dsrc.userdata_raw, "ud")
+        self.assertEqual(dsrc.metadata["local-hostname"], "me")
+        self.assertEqual("azure", dsrc.cloud_name)
+        self.assertEqual("azure", dsrc.platform_type)
+        self.assertEqual("config-disk (/dev/cd0)", dsrc.subplatform)
 
     def test_get_data_non_ubuntu_will_not_remove_network_scripts(self):
         """get_data on non-Ubuntu will not remove ubuntu net scripts."""
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': {}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": {},
+        }
 
-        dsrc = self._get_ds(data, distro='debian')
+        dsrc = self._get_ds(data, distro="debian")
         dsrc.get_data()
         self.m_remove_ubuntu_network_scripts.assert_not_called()
 
     def test_get_data_on_ubuntu_will_remove_network_scripts(self):
         """get_data will remove ubuntu net scripts on Ubuntu distro."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
 
-        dsrc = self._get_ds(data, distro='ubuntu')
+        dsrc = self._get_ds(data, distro="ubuntu")
         dsrc.get_data()
         self.m_remove_ubuntu_network_scripts.assert_called_once_with()
 
     def test_get_data_on_ubuntu_will_not_remove_network_scripts_disabled(self):
         """When apply_network_config false, do not remove scripts on Ubuntu."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': False}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": False}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
 
-        dsrc = self._get_ds(data, distro='ubuntu')
+        dsrc = self._get_ds(data, distro="ubuntu")
         dsrc.get_data()
         self.m_remove_ubuntu_network_scripts.assert_not_called()
 
     def test_crawl_metadata_returns_structured_data_and_caches_nothing(self):
         """Return all structured metadata and cache no class attributes."""
         yaml_cfg = ""
-        odata = {'HostName': "myhost", 'UserName': "myuser",
-                 'UserData': {'text': 'FOOBAR', 'encoding': 'plain'},
-                 'dscfg': {'text': yaml_cfg, 'encoding': 'plain'}}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': {}}
+        odata = {
+            "HostName": "myhost",
+            "UserName": "myuser",
+            "UserData": {"text": "FOOBAR", "encoding": "plain"},
+            "dscfg": {"text": yaml_cfg, "encoding": "plain"},
+        }
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": {},
+        }
         dsrc = self._get_ds(data)
         expected_cfg = {
-            'PreprovisionedVMType': None,
-            'PreprovisionedVm': False,
-            'datasource': {'Azure': {}},
-            'system_info': {'default_user': {'name': 'myuser'}}}
+            "PreprovisionedVMType": None,
+            "PreprovisionedVm": False,
+            "datasource": {"Azure": {}},
+            "system_info": {"default_user": {"name": "myuser"}},
+        }
         expected_metadata = {
-            'azure_data': {
-                'configurationsettype': 'LinuxProvisioningConfiguration'},
-            'imds': NETWORK_METADATA,
-            'instance-id': EXAMPLE_UUID,
-            'local-hostname': 'myhost',
-            'random_seed': 'wild'}
+            "azure_data": {
+                "configurationsettype": "LinuxProvisioningConfiguration"
+            },
+            "imds": NETWORK_METADATA,
+            "instance-id": EXAMPLE_UUID,
+            "local-hostname": "myhost",
+            "random_seed": "wild",
+        }
 
         crawled_metadata = dsrc.crawl_metadata()
 
         self.assertCountEqual(
             crawled_metadata.keys(),
-            ['cfg', 'files', 'metadata', 'userdata_raw'])
-        self.assertEqual(crawled_metadata['cfg'], expected_cfg)
+            ["cfg", "files", "metadata", "userdata_raw"],
+        )
+        self.assertEqual(crawled_metadata["cfg"], expected_cfg)
         self.assertEqual(
-            list(crawled_metadata['files'].keys()), ['ovf-env.xml'])
+            list(crawled_metadata["files"].keys()), ["ovf-env.xml"]
+        )
         self.assertIn(
-            b'<HostName>myhost</HostName>',
-            crawled_metadata['files']['ovf-env.xml'])
-        self.assertEqual(crawled_metadata['metadata'], expected_metadata)
-        self.assertEqual(crawled_metadata['userdata_raw'], 'FOOBAR')
+            b"<HostName>myhost</HostName>",
+            crawled_metadata["files"]["ovf-env.xml"],
+        )
+        self.assertEqual(crawled_metadata["metadata"], expected_metadata)
+        self.assertEqual(crawled_metadata["userdata_raw"], "FOOBAR")
         self.assertEqual(dsrc.userdata_raw, None)
         self.assertEqual(dsrc.metadata, {})
         self.assertEqual(dsrc._metadata_imds, UNSET)
-        self.assertFalse(os.path.isfile(
-            os.path.join(self.waagent_d, 'ovf-env.xml')))
+        self.assertFalse(
+            os.path.isfile(os.path.join(self.waagent_d, "ovf-env.xml"))
+        )
 
     def test_crawl_metadata_raises_invalid_metadata_on_error(self):
         """crawl_metadata raises an exception on invalid ovf-env.xml."""
-        data = {'ovfcontent': "BOGUS", 'sys_cfg': {}}
+        data = {"ovfcontent": "BOGUS", "sys_cfg": {}}
         dsrc = self._get_ds(data)
-        error_msg = ('BrokenAzureDataSource: Invalid ovf-env.xml:'
-                     ' syntax error: line 1, column 0')
+        error_msg = (
+            "BrokenAzureDataSource: Invalid ovf-env.xml:"
+            " syntax error: line 1, column 0"
+        )
         with self.assertRaises(InvalidMetaDataException) as cm:
             dsrc.crawl_metadata()
         self.assertEqual(str(cm.exception), error_msg)
@@ -971,20 +1133,19 @@ scbus-1 on xpt0 bus 0
             platform_settings={"PreprovisionedVm": "False"}
         )
 
-        data = {
-            'ovfcontent': ovfenv,
-            'sys_cfg': {}
-        }
+        data = {"ovfcontent": ovfenv, "sys_cfg": {}}
         dsrc = self._get_ds(data)
         dsrc.crawl_metadata()
         self.assertEqual(1, self.m_get_metadata_from_imds.call_count)
 
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting')
-    @mock.patch('cloudinit.sources.DataSourceAzure.util.write_file')
+        "cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.util.write_file")
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready')
-    @mock.patch('cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds')
+        "cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds")
     def test_crawl_metadata_call_imds_twice_with_reprovision(
         self, poll_imds_func, m_report_ready, m_write, m_dhcp
     ):
@@ -993,21 +1154,20 @@ scbus-1 on xpt0 bus 0
             platform_settings={"PreprovisionedVm": "True"}
         )
 
-        data = {
-            'ovfcontent': ovfenv,
-            'sys_cfg': {}
-        }
+        data = {"ovfcontent": ovfenv, "sys_cfg": {}}
         dsrc = self._get_ds(data)
         poll_imds_func.return_value = ovfenv
         dsrc.crawl_metadata()
         self.assertEqual(2, self.m_get_metadata_from_imds.call_count)
 
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting')
-    @mock.patch('cloudinit.sources.DataSourceAzure.util.write_file')
+        "cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.util.write_file")
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready')
-    @mock.patch('cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds')
+        "cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds")
     def test_crawl_metadata_on_reprovision_reports_ready(
         self, poll_imds_func, m_report_ready, m_write, m_dhcp
     ):
@@ -1016,37 +1176,36 @@ scbus-1 on xpt0 bus 0
             platform_settings={"PreprovisionedVm": "True"}
         )
 
-        data = {
-            'ovfcontent': ovfenv,
-            'sys_cfg': {}
-        }
+        data = {"ovfcontent": ovfenv, "sys_cfg": {}}
         dsrc = self._get_ds(data)
         poll_imds_func.return_value = ovfenv
         dsrc.crawl_metadata()
         self.assertEqual(1, m_report_ready.call_count)
 
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting')
-    @mock.patch('cloudinit.sources.DataSourceAzure.util.write_file')
+        "cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.util.write_file")
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready')
-    @mock.patch('cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds')
+        "cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds")
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.DataSourceAzure.'
-        '_wait_for_all_nics_ready')
+        "cloudinit.sources.DataSourceAzure.DataSourceAzure."
+        "_wait_for_all_nics_ready"
+    )
     def test_crawl_metadata_waits_for_nic_on_savable_vms(
         self, detect_nics, poll_imds_func, report_ready_func, m_write, m_dhcp
     ):
         """If reprovisioning, report ready at the end"""
         ovfenv = construct_valid_ovf_env(
-            platform_settings={"PreprovisionedVMType": "Savable",
-                               "PreprovisionedVm": "True"}
+            platform_settings={
+                "PreprovisionedVMType": "Savable",
+                "PreprovisionedVm": "True",
+            }
         )
 
-        data = {
-            'ovfcontent': ovfenv,
-            'sys_cfg': {}
-        }
+        data = {"ovfcontent": ovfenv, "sys_cfg": {}}
         dsrc = self._get_ds(data)
         poll_imds_func.return_value = ovfenv
         dsrc.crawl_metadata()
@@ -1054,18 +1213,27 @@ scbus-1 on xpt0 bus 0
         self.assertEqual(1, detect_nics.call_count)
 
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting')
-    @mock.patch('cloudinit.sources.DataSourceAzure.util.write_file')
+        "cloudinit.sources.DataSourceAzure.EphemeralDHCPv4WithReporting"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.util.write_file")
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready')
-    @mock.patch('cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds')
+        "cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.DataSourceAzure._poll_imds")
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.DataSourceAzure.'
-        '_wait_for_all_nics_ready')
-    @mock.patch('os.path.isfile')
+        "cloudinit.sources.DataSourceAzure.DataSourceAzure."
+        "_wait_for_all_nics_ready"
+    )
+    @mock.patch("os.path.isfile")
     def test_detect_nics_when_marker_present(
-        self, is_file, detect_nics, poll_imds_func, report_ready_func, m_write,
-            m_dhcp):
+        self,
+        is_file,
+        detect_nics,
+        poll_imds_func,
+        report_ready_func,
+        m_write,
+        m_dhcp,
+    ):
         """If reprovisioning, wait for nic attach if marker present"""
 
         def is_file_ret(key):
@@ -1074,10 +1242,7 @@ scbus-1 on xpt0 bus 0
         is_file.side_effect = is_file_ret
         ovfenv = construct_valid_ovf_env()
 
-        data = {
-            'ovfcontent': ovfenv,
-            'sys_cfg': {}
-        }
+        data = {"ovfcontent": ovfenv, "sys_cfg": {}}
 
         dsrc = self._get_ds(data)
         poll_imds_func.return_value = ovfenv
@@ -1085,29 +1250,28 @@ scbus-1 on xpt0 bus 0
         self.assertEqual(1, report_ready_func.call_count)
         self.assertEqual(1, detect_nics.call_count)
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.util.write_file')
-    @mock.patch('cloudinit.sources.helpers.netlink.'
-                'wait_for_media_disconnect_connect')
+    @mock.patch("cloudinit.sources.DataSourceAzure.util.write_file")
     @mock.patch(
-        'cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready')
-    @mock.patch('cloudinit.sources.DataSourceAzure.readurl')
+        "cloudinit.sources.helpers.netlink.wait_for_media_disconnect_connect"
+    )
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.DataSourceAzure._report_ready"
+    )
+    @mock.patch("cloudinit.sources.DataSourceAzure.readurl")
     def test_crawl_metadata_on_reprovision_reports_ready_using_lease(
-        self, m_readurl, m_report_ready,
-        m_media_switch, m_write
+        self, m_readurl, m_report_ready, m_media_switch, m_write
     ):
         """If reprovisioning, report ready using the obtained lease"""
         ovfenv = construct_valid_ovf_env(
             platform_settings={"PreprovisionedVm": "True"}
         )
 
-        data = {
-            'ovfcontent': ovfenv,
-            'sys_cfg': {}
-        }
+        data = {"ovfcontent": ovfenv, "sys_cfg": {}}
         dsrc = self._get_ds(data)
 
-        with mock.patch.object(dsrc.distro.networking, 'is_up') \
-                as m_dsrc_distro_networking_is_up:
+        with mock.patch.object(
+            dsrc.distro.networking, "is_up"
+        ) as m_dsrc_distro_networking_is_up:
 
             # For this mock, net should not be up,
             # so that cached ephemeral won't be used.
@@ -1116,16 +1280,21 @@ scbus-1 on xpt0 bus 0
             m_dsrc_distro_networking_is_up.return_value = False
 
             lease = {
-                'interface': 'eth9', 'fixed-address': '192.168.2.9',
-                'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-                'unknown-245': '624c3620'}
-            self.m_ephemeral_dhcpv4_with_reporting.return_value \
-                .__enter__.return_value = lease
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+                "unknown-245": "624c3620",
+            }
+            self.m_ephemeral_dhcpv4_with_reporting.return_value.__enter__.return_value = (  # noqa: E501
+                lease
+            )
             m_media_switch.return_value = None
 
             reprovision_ovfenv = construct_valid_ovf_env()
             m_readurl.return_value = url_helper.StringResponse(
-                reprovision_ovfenv.encode('utf-8'))
+                reprovision_ovfenv.encode("utf-8")
+            )
 
             dsrc.crawl_metadata()
             self.assertEqual(2, m_report_ready.call_count)
@@ -1133,91 +1302,118 @@ scbus-1 on xpt0 bus 0
 
     def test_waagent_d_has_0700_perms(self):
         # we expect /var/lib/waagent to be created 0700
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
         ret = dsrc.get_data()
         self.assertTrue(ret)
         self.assertTrue(os.path.isdir(self.waagent_d))
         self.assertEqual(stat.S_IMODE(os.stat(self.waagent_d).st_mode), 0o700)
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_network_config_set_from_imds(self, m_driver):
         """Datasource.network_config returns IMDS network data."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
         odata = {}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
         expected_network_config = {
-            'ethernets': {
-                'eth0': {'set-name': 'eth0',
-                         'match': {'macaddress': '00:0d:3a:04:75:98'},
-                         'dhcp6': False,
-                         'dhcp4': True,
-                         'dhcp4-overrides': {'route-metric': 100}}},
-            'version': 2}
+            "ethernets": {
+                "eth0": {
+                    "set-name": "eth0",
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "dhcp6": False,
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                }
+            },
+            "version": 2,
+        }
         dsrc = self._get_ds(data)
         dsrc.get_data()
         self.assertEqual(expected_network_config, dsrc.network_config)
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_network_config_set_from_imds_route_metric_for_secondary_nic(
-            self, m_driver):
+        self, m_driver
+    ):
         """Datasource.network_config adds route-metric to secondary nics."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
         odata = {}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
         expected_network_config = {
-            'ethernets': {
-                'eth0': {'set-name': 'eth0',
-                         'match': {'macaddress': '00:0d:3a:04:75:98'},
-                         'dhcp6': False,
-                         'dhcp4': True,
-                         'dhcp4-overrides': {'route-metric': 100}},
-                'eth1': {'set-name': 'eth1',
-                         'match': {'macaddress': '22:0d:3a:04:75:98'},
-                         'dhcp6': False,
-                         'dhcp4': True,
-                         'dhcp4-overrides': {'route-metric': 200}},
-                'eth2': {'set-name': 'eth2',
-                         'match': {'macaddress': '33:0d:3a:04:75:98'},
-                         'dhcp6': False,
-                         'dhcp4': True,
-                         'dhcp4-overrides': {'route-metric': 300}}},
-            'version': 2}
+            "ethernets": {
+                "eth0": {
+                    "set-name": "eth0",
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "dhcp6": False,
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                },
+                "eth1": {
+                    "set-name": "eth1",
+                    "match": {"macaddress": "22:0d:3a:04:75:98"},
+                    "dhcp6": False,
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 200},
+                },
+                "eth2": {
+                    "set-name": "eth2",
+                    "match": {"macaddress": "33:0d:3a:04:75:98"},
+                    "dhcp6": False,
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 300},
+                },
+            },
+            "version": 2,
+        }
         imds_data = copy.deepcopy(NETWORK_METADATA)
-        imds_data['network']['interface'].append(SECONDARY_INTERFACE)
+        imds_data["network"]["interface"].append(SECONDARY_INTERFACE)
         third_intf = copy.deepcopy(SECONDARY_INTERFACE)
-        third_intf['macAddress'] = third_intf['macAddress'].replace('22', '33')
-        third_intf['ipv4']['subnet'][0]['address'] = '10.0.2.0'
-        third_intf['ipv4']['ipAddress'][0]['privateIpAddress'] = '10.0.2.6'
-        imds_data['network']['interface'].append(third_intf)
+        third_intf["macAddress"] = third_intf["macAddress"].replace("22", "33")
+        third_intf["ipv4"]["subnet"][0]["address"] = "10.0.2.0"
+        third_intf["ipv4"]["ipAddress"][0]["privateIpAddress"] = "10.0.2.6"
+        imds_data["network"]["interface"].append(third_intf)
 
         self.m_get_metadata_from_imds.return_value = imds_data
         dsrc = self._get_ds(data)
         dsrc.get_data()
         self.assertEqual(expected_network_config, dsrc.network_config)
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
     def test_network_config_set_from_imds_for_secondary_nic_no_ip(
-            self, m_driver):
+        self, m_driver
+    ):
         """If an IP address is empty then there should no config for it."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
         odata = {}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
         expected_network_config = {
-            'ethernets': {
-                'eth0': {'set-name': 'eth0',
-                         'match': {'macaddress': '00:0d:3a:04:75:98'},
-                         'dhcp6': False,
-                         'dhcp4': True,
-                         'dhcp4-overrides': {'route-metric': 100}}},
-            'version': 2}
+            "ethernets": {
+                "eth0": {
+                    "set-name": "eth0",
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "dhcp6": False,
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                }
+            },
+            "version": 2,
+        }
         imds_data = copy.deepcopy(NETWORK_METADATA)
-        imds_data['network']['interface'].append(SECONDARY_INTERFACE_NO_IP)
+        imds_data["network"]["interface"].append(SECONDARY_INTERFACE_NO_IP)
         self.m_get_metadata_from_imds.return_value = imds_data
         dsrc = self._get_ds(data)
         dsrc.get_data()
@@ -1225,91 +1421,110 @@ scbus-1 on xpt0 bus 0
 
     def test_availability_zone_set_from_imds(self):
         """Datasource.availability returns IMDS platformFaultDomain."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
         odata = {}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
         dsrc = self._get_ds(data)
         dsrc.get_data()
-        self.assertEqual('0', dsrc.availability_zone)
+        self.assertEqual("0", dsrc.availability_zone)
 
     def test_region_set_from_imds(self):
         """Datasource.region returns IMDS region location."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
         odata = {}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
         dsrc = self._get_ds(data)
         dsrc.get_data()
-        self.assertEqual('eastus2', dsrc.region)
+        self.assertEqual("eastus2", dsrc.region)
 
     def test_sys_cfg_set_never_destroy_ntfs(self):
-        sys_cfg = {'datasource': {'Azure': {
-            'never_destroy_ntfs': 'user-supplied-value'}}}
-        data = {'ovfcontent': construct_valid_ovf_env(data={}),
-                'sys_cfg': sys_cfg}
+        sys_cfg = {
+            "datasource": {
+                "Azure": {"never_destroy_ntfs": "user-supplied-value"}
+            }
+        }
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data={}),
+            "sys_cfg": sys_cfg,
+        }
 
         dsrc = self._get_ds(data)
         ret = self._get_and_setup(dsrc)
         self.assertTrue(ret)
-        self.assertEqual(dsrc.ds_cfg.get(dsaz.DS_CFG_KEY_PRESERVE_NTFS),
-                         'user-supplied-value')
+        self.assertEqual(
+            dsrc.ds_cfg.get(dsaz.DS_CFG_KEY_PRESERVE_NTFS),
+            "user-supplied-value",
+        )
 
     def test_username_used(self):
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata)}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {"ovfcontent": construct_valid_ovf_env(data=odata)}
 
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(dsrc.cfg['system_info']['default_user']['name'],
-                         "myuser")
+        self.assertEqual(
+            dsrc.cfg["system_info"]["default_user"]["name"], "myuser"
+        )
 
     def test_password_given(self):
-        odata = {'HostName': "myhost", 'UserName': "myuser",
-                 'UserPassword': "mypass"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata)}
+        odata = {
+            "HostName": "myhost",
+            "UserName": "myuser",
+            "UserPassword": "mypass",
+        }
+        data = {"ovfcontent": construct_valid_ovf_env(data=odata)}
 
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertIn('default_user', dsrc.cfg['system_info'])
-        defuser = dsrc.cfg['system_info']['default_user']
+        self.assertIn("default_user", dsrc.cfg["system_info"])
+        defuser = dsrc.cfg["system_info"]["default_user"]
 
         # default user should be updated username and should not be locked.
-        self.assertEqual(defuser['name'], odata['UserName'])
-        self.assertFalse(defuser['lock_passwd'])
+        self.assertEqual(defuser["name"], odata["UserName"])
+        self.assertFalse(defuser["lock_passwd"])
         # passwd is crypt formated string $id$salt$encrypted
         # encrypting plaintext with salt value of everything up to final '$'
         # should equal that after the '$'
-        pos = defuser['passwd'].rfind("$") + 1
-        self.assertEqual(defuser['passwd'],
-                         crypt.crypt(odata['UserPassword'],
-                                     defuser['passwd'][0:pos]))
+        pos = defuser["passwd"].rfind("$") + 1
+        self.assertEqual(
+            defuser["passwd"],
+            crypt.crypt(odata["UserPassword"], defuser["passwd"][0:pos]),
+        )
 
         # the same hashed value should also be present in cfg['password']
-        self.assertEqual(defuser['passwd'], dsrc.cfg['password'])
+        self.assertEqual(defuser["passwd"], dsrc.cfg["password"])
 
     def test_user_not_locked_if_password_redacted(self):
-        odata = {'HostName': "myhost", 'UserName': "myuser",
-                 'UserPassword': dsaz.DEF_PASSWD_REDACTION}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata)}
+        odata = {
+            "HostName": "myhost",
+            "UserName": "myuser",
+            "UserPassword": dsaz.DEF_PASSWD_REDACTION,
+        }
+        data = {"ovfcontent": construct_valid_ovf_env(data=odata)}
 
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertIn('default_user', dsrc.cfg['system_info'])
-        defuser = dsrc.cfg['system_info']['default_user']
+        self.assertIn("default_user", dsrc.cfg["system_info"])
+        defuser = dsrc.cfg["system_info"]["default_user"]
 
         # default user should be updated username and should not be locked.
-        self.assertEqual(defuser['name'], odata['UserName'])
-        self.assertIn('lock_passwd', defuser)
-        self.assertFalse(defuser['lock_passwd'])
+        self.assertEqual(defuser["name"], odata["UserName"])
+        self.assertIn("lock_passwd", defuser)
+        self.assertFalse(defuser["lock_passwd"])
 
     def test_userdata_plain(self):
         mydata = "FOOBAR"
-        odata = {'UserData': {'text': mydata, 'encoding': 'plain'}}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata)}
+        odata = {"UserData": {"text": mydata, "encoding": "plain"}}
+        data = {"ovfcontent": construct_valid_ovf_env(data=odata)}
 
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
@@ -1318,72 +1533,86 @@ scbus-1 on xpt0 bus 0
 
     def test_userdata_found(self):
         mydata = "FOOBAR"
-        odata = {'UserData': {'text': b64e(mydata), 'encoding': 'base64'}}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata)}
+        odata = {"UserData": {"text": b64e(mydata), "encoding": "base64"}}
+        data = {"ovfcontent": construct_valid_ovf_env(data=odata)}
 
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(dsrc.userdata_raw, mydata.encode('utf-8'))
+        self.assertEqual(dsrc.userdata_raw, mydata.encode("utf-8"))
 
     def test_default_ephemeral_configs_ephemeral_exists(self):
         # make sure the ephemeral configs are correct if disk present
         odata = {}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': {}}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": {},
+        }
 
         orig_exists = dsaz.os.path.exists
 
         def changed_exists(path):
-            return True if path == dsaz.RESOURCE_DISK_PATH else orig_exists(
-                path)
+            return (
+                True if path == dsaz.RESOURCE_DISK_PATH else orig_exists(path)
+            )
 
-        with mock.patch(MOCKPATH + 'os.path.exists', new=changed_exists):
+        with mock.patch(MOCKPATH + "os.path.exists", new=changed_exists):
             dsrc = self._get_ds(data)
             ret = dsrc.get_data()
             self.assertTrue(ret)
             cfg = dsrc.get_config_obj()
 
-            self.assertEqual(dsrc.device_name_to_device("ephemeral0"),
-                             dsaz.RESOURCE_DISK_PATH)
-            assert 'disk_setup' in cfg
-            assert 'fs_setup' in cfg
-            self.assertIsInstance(cfg['disk_setup'], dict)
-            self.assertIsInstance(cfg['fs_setup'], list)
+            self.assertEqual(
+                dsrc.device_name_to_device("ephemeral0"),
+                dsaz.RESOURCE_DISK_PATH,
+            )
+            assert "disk_setup" in cfg
+            assert "fs_setup" in cfg
+            self.assertIsInstance(cfg["disk_setup"], dict)
+            self.assertIsInstance(cfg["fs_setup"], list)
 
     def test_default_ephemeral_configs_ephemeral_does_not_exist(self):
         # make sure the ephemeral configs are correct if disk not present
         odata = {}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': {}}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": {},
+        }
 
         orig_exists = dsaz.os.path.exists
 
         def changed_exists(path):
-            return False if path == dsaz.RESOURCE_DISK_PATH else orig_exists(
-                path)
+            return (
+                False if path == dsaz.RESOURCE_DISK_PATH else orig_exists(path)
+            )
 
-        with mock.patch(MOCKPATH + 'os.path.exists', new=changed_exists):
+        with mock.patch(MOCKPATH + "os.path.exists", new=changed_exists):
             dsrc = self._get_ds(data)
             ret = dsrc.get_data()
             self.assertTrue(ret)
             cfg = dsrc.get_config_obj()
 
-            assert 'disk_setup' not in cfg
-            assert 'fs_setup' not in cfg
+            assert "disk_setup" not in cfg
+            assert "fs_setup" not in cfg
 
     def test_provide_disk_aliases(self):
         # Make sure that user can affect disk aliases
-        dscfg = {'disk_aliases': {'ephemeral0': '/dev/sdc'}}
-        odata = {'HostName': "myhost", 'UserName': "myuser",
-                 'dscfg': {'text': b64e(yaml.dump(dscfg)),
-                           'encoding': 'base64'}}
-        usercfg = {'disk_setup': {'/dev/sdc': {'something': '...'},
-                                  'ephemeral0': False}}
-        userdata = '#cloud-config' + yaml.dump(usercfg) + "\n"
+        dscfg = {"disk_aliases": {"ephemeral0": "/dev/sdc"}}
+        odata = {
+            "HostName": "myhost",
+            "UserName": "myuser",
+            "dscfg": {"text": b64e(yaml.dump(dscfg)), "encoding": "base64"},
+        }
+        usercfg = {
+            "disk_setup": {
+                "/dev/sdc": {"something": "..."},
+                "ephemeral0": False,
+            }
+        }
+        userdata = "#cloud-config" + yaml.dump(usercfg) + "\n"
 
         ovfcontent = construct_valid_ovf_env(data=odata, userdata=userdata)
-        data = {'ovfcontent': ovfcontent, 'sys_cfg': {}}
+        data = {"ovfcontent": ovfcontent, "sys_cfg": {}}
 
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
@@ -1394,92 +1623,95 @@ scbus-1 on xpt0 bus 0
     def test_userdata_arrives(self):
         userdata = "This is my user-data"
         xml = construct_valid_ovf_env(data={}, userdata=userdata)
-        data = {'ovfcontent': xml}
+        data = {"ovfcontent": xml}
         dsrc = self._get_ds(data)
         dsrc.get_data()
 
-        self.assertEqual(userdata.encode('us-ascii'), dsrc.userdata_raw)
+        self.assertEqual(userdata.encode("us-ascii"), dsrc.userdata_raw)
 
     def test_password_redacted_in_ovf(self):
-        odata = {'HostName': "myhost", 'UserName': "myuser",
-                 'UserPassword': "mypass"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata)}
+        odata = {
+            "HostName": "myhost",
+            "UserName": "myuser",
+            "UserPassword": "mypass",
+        }
+        data = {"ovfcontent": construct_valid_ovf_env(data=odata)}
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
 
         self.assertTrue(ret)
-        ovf_env_path = os.path.join(self.waagent_d, 'ovf-env.xml')
+        ovf_env_path = os.path.join(self.waagent_d, "ovf-env.xml")
 
         # The XML should not be same since the user password is redacted
         on_disk_ovf = load_file(ovf_env_path)
-        self.xml_notequals(data['ovfcontent'], on_disk_ovf)
+        self.xml_notequals(data["ovfcontent"], on_disk_ovf)
 
         # Make sure that the redacted password on disk is not used by CI
-        self.assertNotEqual(dsrc.cfg.get('password'),
-                            dsaz.DEF_PASSWD_REDACTION)
+        self.assertNotEqual(
+            dsrc.cfg.get("password"), dsaz.DEF_PASSWD_REDACTION
+        )
 
         # Make sure that the password was really encrypted
         et = ET.fromstring(on_disk_ovf)
         for elem in et.iter():
-            if 'UserPassword' in elem.tag:
+            if "UserPassword" in elem.tag:
                 self.assertEqual(dsaz.DEF_PASSWD_REDACTION, elem.text)
 
     def test_ovf_env_arrives_in_waagent_dir(self):
         xml = construct_valid_ovf_env(data={}, userdata="FOODATA")
-        dsrc = self._get_ds({'ovfcontent': xml})
+        dsrc = self._get_ds({"ovfcontent": xml})
         dsrc.get_data()
 
         # 'data_dir' is '/var/lib/waagent' (walinux-agent's state dir)
         # we expect that the ovf-env.xml file is copied there.
-        ovf_env_path = os.path.join(self.waagent_d, 'ovf-env.xml')
+        ovf_env_path = os.path.join(self.waagent_d, "ovf-env.xml")
         self.assertTrue(os.path.exists(ovf_env_path))
         self.xml_equals(xml, load_file(ovf_env_path))
 
     def test_ovf_can_include_unicode(self):
         xml = construct_valid_ovf_env(data={})
-        xml = '\ufeff{0}'.format(xml)
-        dsrc = self._get_ds({'ovfcontent': xml})
+        xml = "\ufeff{0}".format(xml)
+        dsrc = self._get_ds({"ovfcontent": xml})
         dsrc.get_data()
 
-    def test_dsaz_report_ready_returns_true_when_report_succeeds(
-            self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+    def test_dsaz_report_ready_returns_true_when_report_succeeds(self):
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
         self.assertTrue(dsrc._report_ready(lease=mock.MagicMock()))
 
-    def test_dsaz_report_ready_returns_false_and_does_not_propagate_exc(
-            self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+    def test_dsaz_report_ready_returns_false_and_does_not_propagate_exc(self):
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
         self.m_get_metadata_from_fabric.side_effect = Exception
         self.assertFalse(dsrc._report_ready(lease=mock.MagicMock()))
 
     def test_dsaz_report_failure_returns_true_when_report_succeeds(self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
 
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata:
+        with mock.patch.object(dsrc, "crawl_metadata") as m_crawl_metadata:
             # mock crawl metadata failure to cause report failure
             m_crawl_metadata.side_effect = Exception
 
             self.assertTrue(dsrc._report_failure())
-            self.assertEqual(
-                1,
-                self.m_report_failure_to_fabric.call_count)
+            self.assertEqual(1, self.m_report_failure_to_fabric.call_count)
 
     def test_dsaz_report_failure_returns_false_and_does_not_propagate_exc(
-            self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
-
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata, \
-                mock.patch.object(dsrc, '_ephemeral_dhcp_ctx') \
-                as m_ephemeral_dhcp_ctx, \
-                mock.patch.object(dsrc.distro.networking, 'is_up') \
-                as m_dsrc_distro_networking_is_up:
+        self,
+    ):
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
+
+        with mock.patch.object(
+            dsrc, "crawl_metadata"
+        ) as m_crawl_metadata, mock.patch.object(
+            dsrc, "_ephemeral_dhcp_ctx"
+        ) as m_ephemeral_dhcp_ctx, mock.patch.object(
+            dsrc.distro.networking, "is_up"
+        ) as m_dsrc_distro_networking_is_up:
             # mock crawl metadata failure to cause report failure
             m_crawl_metadata.side_effect = Exception
 
             # setup mocks to allow using cached ephemeral dhcp lease
             m_dsrc_distro_networking_is_up.return_value = True
-            test_lease_dhcp_option_245 = 'test_lease_dhcp_option_245'
-            test_lease = {'unknown-245': test_lease_dhcp_option_245}
+            test_lease_dhcp_option_245 = "test_lease_dhcp_option_245"
+            test_lease = {"unknown-245": test_lease_dhcp_option_245}
             m_ephemeral_dhcp_ctx.lease = test_lease
 
             # We expect 3 calls to report_failure_to_fabric,
@@ -1490,91 +1722,97 @@ scbus-1 on xpt0 bus 0
             # 3. Using fallback lease to report failure to Azure
             self.m_report_failure_to_fabric.side_effect = Exception
             self.assertFalse(dsrc._report_failure())
-            self.assertEqual(
-                3,
-                self.m_report_failure_to_fabric.call_count)
+            self.assertEqual(3, self.m_report_failure_to_fabric.call_count)
 
     def test_dsaz_report_failure_description_msg(self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
 
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata:
+        with mock.patch.object(dsrc, "crawl_metadata") as m_crawl_metadata:
             # mock crawl metadata failure to cause report failure
             m_crawl_metadata.side_effect = Exception
 
-            test_msg = 'Test report failure description message'
+            test_msg = "Test report failure description message"
             self.assertTrue(dsrc._report_failure(description=test_msg))
             self.m_report_failure_to_fabric.assert_called_once_with(
-                dhcp_opts=mock.ANY, description=test_msg)
+                dhcp_opts=mock.ANY, description=test_msg
+            )
 
     def test_dsaz_report_failure_no_description_msg(self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
 
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata:
+        with mock.patch.object(dsrc, "crawl_metadata") as m_crawl_metadata:
             m_crawl_metadata.side_effect = Exception
 
             self.assertTrue(dsrc._report_failure())  # no description msg
             self.m_report_failure_to_fabric.assert_called_once_with(
-                dhcp_opts=mock.ANY, description=None)
+                dhcp_opts=mock.ANY, description=None
+            )
 
     def test_dsaz_report_failure_uses_cached_ephemeral_dhcp_ctx_lease(self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
-
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata, \
-                mock.patch.object(dsrc, '_ephemeral_dhcp_ctx') \
-                as m_ephemeral_dhcp_ctx, \
-                mock.patch.object(dsrc.distro.networking, 'is_up') \
-                as m_dsrc_distro_networking_is_up:
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
+
+        with mock.patch.object(
+            dsrc, "crawl_metadata"
+        ) as m_crawl_metadata, mock.patch.object(
+            dsrc, "_ephemeral_dhcp_ctx"
+        ) as m_ephemeral_dhcp_ctx, mock.patch.object(
+            dsrc.distro.networking, "is_up"
+        ) as m_dsrc_distro_networking_is_up:
             # mock crawl metadata failure to cause report failure
             m_crawl_metadata.side_effect = Exception
 
             # setup mocks to allow using cached ephemeral dhcp lease
             m_dsrc_distro_networking_is_up.return_value = True
-            test_lease_dhcp_option_245 = 'test_lease_dhcp_option_245'
-            test_lease = {'unknown-245': test_lease_dhcp_option_245}
+            test_lease_dhcp_option_245 = "test_lease_dhcp_option_245"
+            test_lease = {"unknown-245": test_lease_dhcp_option_245}
             m_ephemeral_dhcp_ctx.lease = test_lease
 
             self.assertTrue(dsrc._report_failure())
 
             # ensure called with cached ephemeral dhcp lease option 245
             self.m_report_failure_to_fabric.assert_called_once_with(
-                description=mock.ANY, dhcp_opts=test_lease_dhcp_option_245)
+                description=mock.ANY, dhcp_opts=test_lease_dhcp_option_245
+            )
 
             # ensure cached ephemeral is cleaned
-            self.assertEqual(
-                1,
-                m_ephemeral_dhcp_ctx.clean_network.call_count)
+            self.assertEqual(1, m_ephemeral_dhcp_ctx.clean_network.call_count)
 
     def test_dsaz_report_failure_no_net_uses_new_ephemeral_dhcp_lease(self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
 
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata, \
-                mock.patch.object(dsrc.distro.networking, 'is_up') \
-                as m_dsrc_distro_networking_is_up:
+        with mock.patch.object(
+            dsrc, "crawl_metadata"
+        ) as m_crawl_metadata, mock.patch.object(
+            dsrc.distro.networking, "is_up"
+        ) as m_dsrc_distro_networking_is_up:
             # mock crawl metadata failure to cause report failure
             m_crawl_metadata.side_effect = Exception
 
             # net is not up and cannot use cached ephemeral dhcp
             m_dsrc_distro_networking_is_up.return_value = False
             # setup ephemeral dhcp lease discovery mock
-            test_lease_dhcp_option_245 = 'test_lease_dhcp_option_245'
-            test_lease = {'unknown-245': test_lease_dhcp_option_245}
-            self.m_ephemeral_dhcpv4_with_reporting.return_value \
-                .__enter__.return_value = test_lease
+            test_lease_dhcp_option_245 = "test_lease_dhcp_option_245"
+            test_lease = {"unknown-245": test_lease_dhcp_option_245}
+            self.m_ephemeral_dhcpv4_with_reporting.return_value.__enter__.return_value = (  # noqa: E501
+                test_lease
+            )
 
             self.assertTrue(dsrc._report_failure())
 
             # ensure called with the newly discovered
             # ephemeral dhcp lease option 245
             self.m_report_failure_to_fabric.assert_called_once_with(
-                description=mock.ANY, dhcp_opts=test_lease_dhcp_option_245)
+                description=mock.ANY, dhcp_opts=test_lease_dhcp_option_245
+            )
 
-    def test_dsaz_report_failure_no_net_and_no_dhcp_uses_fallback_lease(
-            self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+    def test_dsaz_report_failure_no_net_and_no_dhcp_uses_fallback_lease(self):
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
 
-        with mock.patch.object(dsrc, 'crawl_metadata') as m_crawl_metadata, \
-                mock.patch.object(dsrc.distro.networking, 'is_up') \
-                as m_dsrc_distro_networking_is_up:
+        with mock.patch.object(
+            dsrc, "crawl_metadata"
+        ) as m_crawl_metadata, mock.patch.object(
+            dsrc.distro.networking, "is_up"
+        ) as m_dsrc_distro_networking_is_up:
             # mock crawl metadata failure to cause report failure
             m_crawl_metadata.side_effect = Exception
 
@@ -1582,29 +1820,31 @@ scbus-1 on xpt0 bus 0
             m_dsrc_distro_networking_is_up.return_value = False
             # ephemeral dhcp discovery failure,
             # so cannot use a new ephemeral dhcp
-            self.m_ephemeral_dhcpv4_with_reporting.return_value \
-                .__enter__.side_effect = Exception
+            self.m_ephemeral_dhcpv4_with_reporting.return_value.__enter__.side_effect = (  # noqa: E501
+                Exception
+            )
 
             self.assertTrue(dsrc._report_failure())
 
             # ensure called with fallback lease
             self.m_report_failure_to_fabric.assert_called_once_with(
                 description=mock.ANY,
-                fallback_lease_file=dsrc.dhclient_lease_file)
+                fallback_lease_file=dsrc.dhclient_lease_file,
+            )
 
     def test_exception_fetching_fabric_data_doesnt_propagate(self):
         """Errors communicating with fabric should warn, but return True."""
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
         self.m_get_metadata_from_fabric.side_effect = Exception
         ret = self._get_and_setup(dsrc)
         self.assertTrue(ret)
 
     def test_fabric_data_included_in_metadata(self):
-        dsrc = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
-        self.m_get_metadata_from_fabric.return_value = {'test': 'value'}
+        dsrc = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
+        self.m_get_metadata_from_fabric.return_value = {"test": "value"}
         ret = self._get_and_setup(dsrc)
         self.assertTrue(ret)
-        self.assertEqual('value', dsrc.metadata['test'])
+        self.assertEqual("value", dsrc.metadata["test"])
 
     def test_instance_id_case_insensitive(self):
         """Return the previous iid when current is a case-insensitive match."""
@@ -1612,152 +1852,180 @@ scbus-1 on xpt0 bus 0
         upper_iid = EXAMPLE_UUID.upper()
         # lowercase current UUID
         ds = self._get_ds(
-            {'ovfcontent': construct_valid_ovf_env()}, instance_id=lower_iid
+            {"ovfcontent": construct_valid_ovf_env()}, instance_id=lower_iid
         )
         # UPPERCASE previous
         write_file(
-            os.path.join(self.paths.cloud_dir, 'data', 'instance-id'),
-            upper_iid)
+            os.path.join(self.paths.cloud_dir, "data", "instance-id"),
+            upper_iid,
+        )
         ds.get_data()
-        self.assertEqual(upper_iid, ds.metadata['instance-id'])
+        self.assertEqual(upper_iid, ds.metadata["instance-id"])
 
         # UPPERCASE current UUID
         ds = self._get_ds(
-            {'ovfcontent': construct_valid_ovf_env()}, instance_id=upper_iid
+            {"ovfcontent": construct_valid_ovf_env()}, instance_id=upper_iid
         )
         # lowercase previous
         write_file(
-            os.path.join(self.paths.cloud_dir, 'data', 'instance-id'),
-            lower_iid)
+            os.path.join(self.paths.cloud_dir, "data", "instance-id"),
+            lower_iid,
+        )
         ds.get_data()
-        self.assertEqual(lower_iid, ds.metadata['instance-id'])
+        self.assertEqual(lower_iid, ds.metadata["instance-id"])
 
     def test_instance_id_endianness(self):
         """Return the previous iid when dmi uuid is the byteswapped iid."""
-        ds = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        ds = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
         # byte-swapped previous
         write_file(
-            os.path.join(self.paths.cloud_dir, 'data', 'instance-id'),
-            '544CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8')
+            os.path.join(self.paths.cloud_dir, "data", "instance-id"),
+            "544CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8",
+        )
         ds.get_data()
         self.assertEqual(
-            '544CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8', ds.metadata['instance-id'])
+            "544CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8", ds.metadata["instance-id"]
+        )
         # not byte-swapped previous
         write_file(
-            os.path.join(self.paths.cloud_dir, 'data', 'instance-id'),
-            '644CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8')
+            os.path.join(self.paths.cloud_dir, "data", "instance-id"),
+            "644CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8",
+        )
         ds.get_data()
-        self.assertEqual(self.instance_id, ds.metadata['instance-id'])
+        self.assertEqual(self.instance_id, ds.metadata["instance-id"])
 
     def test_instance_id_from_dmidecode_used(self):
-        ds = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        ds = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
         ds.get_data()
-        self.assertEqual(self.instance_id, ds.metadata['instance-id'])
+        self.assertEqual(self.instance_id, ds.metadata["instance-id"])
 
     def test_instance_id_from_dmidecode_used_for_builtin(self):
-        ds = self._get_ds({'ovfcontent': construct_valid_ovf_env()})
+        ds = self._get_ds({"ovfcontent": construct_valid_ovf_env()})
         ds.get_data()
-        self.assertEqual(self.instance_id, ds.metadata['instance-id'])
+        self.assertEqual(self.instance_id, ds.metadata["instance-id"])
 
-    @mock.patch(MOCKPATH + 'util.is_FreeBSD')
-    @mock.patch(MOCKPATH + '_check_freebsd_cdrom')
-    def test_list_possible_azure_ds(self, m_check_fbsd_cdrom,
-                                    m_is_FreeBSD):
+    @mock.patch(MOCKPATH + "util.is_FreeBSD")
+    @mock.patch(MOCKPATH + "_check_freebsd_cdrom")
+    def test_list_possible_azure_ds(self, m_check_fbsd_cdrom, m_is_FreeBSD):
         """On FreeBSD, possible devs should show /dev/cd0."""
         m_is_FreeBSD.return_value = True
         m_check_fbsd_cdrom.return_value = True
         possible_ds = []
-        for src in dsaz.list_possible_azure_ds(
-                "seed_dir", "cache_dir"):
+        for src in dsaz.list_possible_azure_ds("seed_dir", "cache_dir"):
             possible_ds.append(src)
-        self.assertEqual(possible_ds, ["seed_dir",
-                                       dsaz.DEFAULT_PROVISIONING_ISO_DEV,
-                                       "/dev/cd0",
-                                       "cache_dir"])
         self.assertEqual(
-            [mock.call("/dev/cd0")], m_check_fbsd_cdrom.call_args_list)
+            possible_ds,
+            [
+                "seed_dir",
+                dsaz.DEFAULT_PROVISIONING_ISO_DEV,
+                "/dev/cd0",
+                "cache_dir",
+            ],
+        )
+        self.assertEqual(
+            [mock.call("/dev/cd0")], m_check_fbsd_cdrom.call_args_list
+        )
 
-    @mock.patch('cloudinit.sources.DataSourceAzure.device_driver',
-                return_value=None)
-    @mock.patch('cloudinit.net.generate_fallback_config')
+    @mock.patch(
+        "cloudinit.sources.DataSourceAzure.device_driver", return_value=None
+    )
+    @mock.patch("cloudinit.net.generate_fallback_config")
     def test_imds_network_config(self, mock_fallback, m_driver):
         """Network config is generated from IMDS network data when present."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
 
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
 
         expected_cfg = {
-            'ethernets': {
-                'eth0': {'dhcp4': True,
-                         'dhcp4-overrides': {'route-metric': 100},
-                         'dhcp6': False,
-                         'match': {'macaddress': '00:0d:3a:04:75:98'},
-                         'set-name': 'eth0'}},
-            'version': 2}
+            "ethernets": {
+                "eth0": {
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": False,
+                    "match": {"macaddress": "00:0d:3a:04:75:98"},
+                    "set-name": "eth0",
+                }
+            },
+            "version": 2,
+        }
 
         self.assertEqual(expected_cfg, dsrc.network_config)
         mock_fallback.assert_not_called()
 
-    @mock.patch('cloudinit.net.get_interface_mac')
-    @mock.patch('cloudinit.net.get_devicelist')
-    @mock.patch('cloudinit.net.device_driver')
-    @mock.patch('cloudinit.net.generate_fallback_config')
+    @mock.patch("cloudinit.net.get_interface_mac")
+    @mock.patch("cloudinit.net.get_devicelist")
+    @mock.patch("cloudinit.net.device_driver")
+    @mock.patch("cloudinit.net.generate_fallback_config")
     def test_imds_network_ignored_when_apply_network_config_false(
-            self, mock_fallback, mock_dd, mock_devlist, mock_get_mac):
+        self, mock_fallback, mock_dd, mock_devlist, mock_get_mac
+    ):
         """When apply_network_config is False, use fallback instead of IMDS."""
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': False}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': sys_cfg}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": False}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
+        }
         fallback_config = {
-            'version': 1,
-            'config': [{
-                'type': 'physical', 'name': 'eth0',
-                'mac_address': '00:11:22:33:44:55',
-                'params': {'driver': 'hv_netsvc'},
-                'subnets': [{'type': 'dhcp'}],
-            }]
+            "version": 1,
+            "config": [
+                {
+                    "type": "physical",
+                    "name": "eth0",
+                    "mac_address": "00:11:22:33:44:55",
+                    "params": {"driver": "hv_netsvc"},
+                    "subnets": [{"type": "dhcp"}],
+                }
+            ],
         }
         mock_fallback.return_value = fallback_config
 
-        mock_devlist.return_value = ['eth0']
-        mock_dd.return_value = ['hv_netsvc']
-        mock_get_mac.return_value = '00:11:22:33:44:55'
+        mock_devlist.return_value = ["eth0"]
+        mock_dd.return_value = ["hv_netsvc"]
+        mock_get_mac.return_value = "00:11:22:33:44:55"
 
         dsrc = self._get_ds(data)
         self.assertTrue(dsrc.get_data())
         self.assertEqual(dsrc.network_config, fallback_config)
 
-    @mock.patch('cloudinit.net.get_interface_mac')
-    @mock.patch('cloudinit.net.get_devicelist')
-    @mock.patch('cloudinit.net.device_driver')
-    @mock.patch('cloudinit.net.generate_fallback_config', autospec=True)
-    def test_fallback_network_config(self, mock_fallback, mock_dd,
-                                     mock_devlist, mock_get_mac):
+    @mock.patch("cloudinit.net.get_interface_mac")
+    @mock.patch("cloudinit.net.get_devicelist")
+    @mock.patch("cloudinit.net.device_driver")
+    @mock.patch("cloudinit.net.generate_fallback_config", autospec=True)
+    def test_fallback_network_config(
+        self, mock_fallback, mock_dd, mock_devlist, mock_get_mac
+    ):
         """On absent IMDS network data, generate network fallback config."""
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': {}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": {},
+        }
 
         fallback_config = {
-            'version': 1,
-            'config': [{
-                'type': 'physical', 'name': 'eth0',
-                'mac_address': '00:11:22:33:44:55',
-                'params': {'driver': 'hv_netsvc'},
-                'subnets': [{'type': 'dhcp'}],
-            }]
+            "version": 1,
+            "config": [
+                {
+                    "type": "physical",
+                    "name": "eth0",
+                    "mac_address": "00:11:22:33:44:55",
+                    "params": {"driver": "hv_netsvc"},
+                    "subnets": [{"type": "dhcp"}],
+                }
+            ],
         }
         mock_fallback.return_value = fallback_config
 
-        mock_devlist.return_value = ['eth0']
-        mock_dd.return_value = ['hv_netsvc']
-        mock_get_mac.return_value = '00:11:22:33:44:55'
+        mock_devlist.return_value = ["eth0"]
+        mock_dd.return_value = ["hv_netsvc"]
+        mock_get_mac.return_value = "00:11:22:33:44:55"
 
         dsrc = self._get_ds(data)
         # Represent empty response from network imds
@@ -1768,37 +2036,41 @@ scbus-1 on xpt0 bus 0
         netconfig = dsrc.network_config
         self.assertEqual(netconfig, fallback_config)
         mock_fallback.assert_called_with(
-            blacklist_drivers=['mlx4_core', 'mlx5_core'],
-            config_driver=True)
+            blacklist_drivers=["mlx4_core", "mlx5_core"], config_driver=True
+        )
 
-    @mock.patch(MOCKPATH + 'net.get_interfaces', autospec=True)
-    def test_blacklist_through_distro(
-            self, m_net_get_interfaces):
+    @mock.patch(MOCKPATH + "net.get_interfaces", autospec=True)
+    def test_blacklist_through_distro(self, m_net_get_interfaces):
         """Verify Azure DS updates blacklist drivers in the distro's
-           networking object."""
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
-        data = {'ovfcontent': construct_valid_ovf_env(data=odata),
-                'sys_cfg': {}}
+        networking object."""
+        odata = {"HostName": "myhost", "UserName": "myuser"}
+        data = {
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": {},
+        }
 
-        distro_cls = distros.fetch('ubuntu')
-        distro = distro_cls('ubuntu', {}, self.paths)
+        distro_cls = distros.fetch("ubuntu")
+        distro = distro_cls("ubuntu", {}, self.paths)
         dsrc = self._get_ds(data, distro=distro)
         dsrc.get_data()
-        self.assertEqual(distro.networking.blacklist_drivers,
-                         dsaz.BLACKLIST_DRIVERS)
+        self.assertEqual(
+            distro.networking.blacklist_drivers, dsaz.BLACKLIST_DRIVERS
+        )
 
         distro.networking.get_interfaces_by_mac()
         m_net_get_interfaces.assert_called_with(
-            blacklist_drivers=dsaz.BLACKLIST_DRIVERS)
+            blacklist_drivers=dsaz.BLACKLIST_DRIVERS
+        )
 
     @mock.patch(
-        'cloudinit.sources.helpers.azure.OpenSSLManager.parse_certificates')
+        "cloudinit.sources.helpers.azure.OpenSSLManager.parse_certificates"
+    )
     def test_get_public_ssh_keys_with_imds(self, m_parse_certificates):
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         dsrc = self._get_ds(data)
         dsrc.get_data()
@@ -1808,32 +2080,32 @@ scbus-1 on xpt0 bus 0
         self.assertEqual(m_parse_certificates.call_count, 0)
 
     def test_key_without_crlf_valid(self):
-        test_key = 'ssh-rsa somerandomkeystuff some comment'
+        test_key = "ssh-rsa somerandomkeystuff some comment"
         assert True is dsaz._key_is_openssh_formatted(test_key)
 
     def test_key_with_crlf_invalid(self):
-        test_key = 'ssh-rsa someran\r\ndomkeystuff some comment'
+        test_key = "ssh-rsa someran\r\ndomkeystuff some comment"
         assert False is dsaz._key_is_openssh_formatted(test_key)
 
     def test_key_endswith_crlf_valid(self):
-        test_key = 'ssh-rsa somerandomkeystuff some comment\r\n'
+        test_key = "ssh-rsa somerandomkeystuff some comment\r\n"
         assert True is dsaz._key_is_openssh_formatted(test_key)
 
     @mock.patch(
-        'cloudinit.sources.helpers.azure.OpenSSLManager.parse_certificates')
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
+        "cloudinit.sources.helpers.azure.OpenSSLManager.parse_certificates"
+    )
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
     def test_get_public_ssh_keys_with_no_openssh_format(
-            self,
-            m_get_metadata_from_imds,
-            m_parse_certificates):
+        self, m_get_metadata_from_imds, m_parse_certificates
+    ):
         imds_data = copy.deepcopy(NETWORK_METADATA)
-        imds_data['compute']['publicKeys'][0]['keyData'] = 'no-openssh-format'
+        imds_data["compute"]["publicKeys"][0]["keyData"] = "no-openssh-format"
         m_get_metadata_from_imds.return_value = imds_data
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         dsrc = self._get_ds(data)
         dsrc.get_data()
@@ -1842,38 +2114,37 @@ scbus-1 on xpt0 bus 0
         self.assertEqual(ssh_keys, [])
         self.assertEqual(m_parse_certificates.call_count, 0)
 
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
-    def test_get_public_ssh_keys_without_imds(
-            self,
-            m_get_metadata_from_imds):
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
+    def test_get_public_ssh_keys_without_imds(self, m_get_metadata_from_imds):
         m_get_metadata_from_imds.return_value = dict()
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         dsrc = self._get_ds(data)
-        dsaz.get_metadata_from_fabric.return_value = {'public-keys': ['key2']}
+        dsaz.get_metadata_from_fabric.return_value = {"public-keys": ["key2"]}
         dsrc.get_data()
         dsrc.setup(True)
         ssh_keys = dsrc.get_public_ssh_keys()
-        self.assertEqual(ssh_keys, ['key2'])
+        self.assertEqual(ssh_keys, ["key2"])
 
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
     def test_imds_api_version_wanted_nonexistent(
-            self,
-            m_get_metadata_from_imds):
+        self, m_get_metadata_from_imds
+    ):
         def get_metadata_from_imds_side_eff(*args, **kwargs):
-            if kwargs['api_version'] == dsaz.IMDS_VER_WANT:
+            if kwargs["api_version"] == dsaz.IMDS_VER_WANT:
                 raise url_helper.UrlError("No IMDS version", code=400)
             return NETWORK_METADATA
+
         m_get_metadata_from_imds.side_effect = get_metadata_from_imds_side_eff
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         dsrc = self._get_ds(data)
         dsrc.get_data()
@@ -1881,86 +2152,86 @@ scbus-1 on xpt0 bus 0
         self.assertTrue(dsrc.failed_desired_api_version)
 
     @mock.patch(
-        MOCKPATH + 'get_metadata_from_imds', return_value=NETWORK_METADATA)
+        MOCKPATH + "get_metadata_from_imds", return_value=NETWORK_METADATA
+    )
     def test_imds_api_version_wanted_exists(self, m_get_metadata_from_imds):
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         dsrc = self._get_ds(data)
         dsrc.get_data()
         self.assertIsNotNone(dsrc.metadata)
         self.assertFalse(dsrc.failed_desired_api_version)
 
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
     def test_hostname_from_imds(self, m_get_metadata_from_imds):
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         imds_data_with_os_profile = copy.deepcopy(NETWORK_METADATA)
         imds_data_with_os_profile["compute"]["osProfile"] = dict(
             adminUsername="username1",
             computerName="hostname1",
-            disablePasswordAuthentication="true"
+            disablePasswordAuthentication="true",
         )
         m_get_metadata_from_imds.return_value = imds_data_with_os_profile
         dsrc = self._get_ds(data)
         dsrc.get_data()
         self.assertEqual(dsrc.metadata["local-hostname"], "hostname1")
 
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
     def test_username_from_imds(self, m_get_metadata_from_imds):
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         imds_data_with_os_profile = copy.deepcopy(NETWORK_METADATA)
         imds_data_with_os_profile["compute"]["osProfile"] = dict(
             adminUsername="username1",
             computerName="hostname1",
-            disablePasswordAuthentication="true"
+            disablePasswordAuthentication="true",
         )
         m_get_metadata_from_imds.return_value = imds_data_with_os_profile
         dsrc = self._get_ds(data)
         dsrc.get_data()
         self.assertEqual(
-            dsrc.cfg["system_info"]["default_user"]["name"],
-            "username1"
+            dsrc.cfg["system_info"]["default_user"]["name"], "username1"
         )
 
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
     def test_disable_password_from_imds(self, m_get_metadata_from_imds):
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         imds_data_with_os_profile = copy.deepcopy(NETWORK_METADATA)
         imds_data_with_os_profile["compute"]["osProfile"] = dict(
             adminUsername="username1",
             computerName="hostname1",
-            disablePasswordAuthentication="true"
+            disablePasswordAuthentication="true",
         )
         m_get_metadata_from_imds.return_value = imds_data_with_os_profile
         dsrc = self._get_ds(data)
         dsrc.get_data()
         self.assertTrue(dsrc.metadata["disable_password"])
 
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
     def test_userdata_from_imds(self, m_get_metadata_from_imds):
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
-        odata = {'HostName': "myhost", 'UserName': "myuser"}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
+        odata = {"HostName": "myhost", "UserName": "myuser"}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
         userdata = "userdataImds"
         imds_data = copy.deepcopy(NETWORK_METADATA)
@@ -1974,20 +2245,22 @@ scbus-1 on xpt0 bus 0
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(dsrc.userdata_raw, userdata.encode('utf-8'))
+        self.assertEqual(dsrc.userdata_raw, userdata.encode("utf-8"))
 
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
     def test_userdata_from_imds_with_customdata_from_OVF(
-            self, m_get_metadata_from_imds):
+        self, m_get_metadata_from_imds
+    ):
         userdataOVF = "userdataOVF"
         odata = {
-            'HostName': "myhost", 'UserName': "myuser",
-            'UserData': {'text': b64e(userdataOVF), 'encoding': 'base64'}
+            "HostName": "myhost",
+            "UserName": "myuser",
+            "UserData": {"text": b64e(userdataOVF), "encoding": "base64"},
         }
-        sys_cfg = {'datasource': {'Azure': {'apply_network_config': True}}}
+        sys_cfg = {"datasource": {"Azure": {"apply_network_config": True}}}
         data = {
-            'ovfcontent': construct_valid_ovf_env(data=odata),
-            'sys_cfg': sys_cfg
+            "ovfcontent": construct_valid_ovf_env(data=odata),
+            "sys_cfg": sys_cfg,
         }
 
         userdataImds = "userdataImds"
@@ -2002,7 +2275,7 @@ scbus-1 on xpt0 bus 0
         dsrc = self._get_ds(data)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(dsrc.userdata_raw, userdataOVF.encode('utf-8'))
+        self.assertEqual(dsrc.userdata_raw, userdataOVF.encode("utf-8"))
 
 
 class TestLoadAzureDsDir(CiTestCase):
@@ -2017,39 +2290,40 @@ class TestLoadAzureDsDir(CiTestCase):
         with self.assertRaises(dsaz.NonAzureDataSource) as context_manager:
             dsaz.load_azure_ds_dir(self.source_dir)
         self.assertEqual(
-            'No ovf-env file found',
-            str(context_manager.exception))
+            "No ovf-env file found", str(context_manager.exception)
+        )
 
     def test_wb_invalid_ovf_env_xml_calls_read_azure_ovf(self):
         """load_azure_ds_dir calls read_azure_ovf to parse the xml."""
-        ovf_path = os.path.join(self.source_dir, 'ovf-env.xml')
-        with open(ovf_path, 'wb') as stream:
-            stream.write(b'invalid xml')
+        ovf_path = os.path.join(self.source_dir, "ovf-env.xml")
+        with open(ovf_path, "wb") as stream:
+            stream.write(b"invalid xml")
         with self.assertRaises(dsaz.BrokenAzureDataSource) as context_manager:
             dsaz.load_azure_ds_dir(self.source_dir)
         self.assertEqual(
-            'Invalid ovf-env.xml: syntax error: line 1, column 0',
-            str(context_manager.exception))
+            "Invalid ovf-env.xml: syntax error: line 1, column 0",
+            str(context_manager.exception),
+        )
 
 
 class TestReadAzureOvf(CiTestCase):
-
     def test_invalid_xml_raises_non_azure_ds(self):
         invalid_xml = "<foo>" + construct_valid_ovf_env(data={})
-        self.assertRaises(dsaz.BrokenAzureDataSource,
-                          dsaz.read_azure_ovf, invalid_xml)
+        self.assertRaises(
+            dsaz.BrokenAzureDataSource, dsaz.read_azure_ovf, invalid_xml
+        )
 
     def test_load_with_pubkeys(self):
-        mypklist = [{'fingerprint': 'fp1', 'path': 'path1', 'value': ''}]
-        pubkeys = [(x['fingerprint'], x['path'], x['value']) for x in mypklist]
+        mypklist = [{"fingerprint": "fp1", "path": "path1", "value": ""}]
+        pubkeys = [(x["fingerprint"], x["path"], x["value"]) for x in mypklist]
         content = construct_valid_ovf_env(pubkeys=pubkeys)
         (_md, _ud, cfg) = dsaz.read_azure_ovf(content)
         for mypk in mypklist:
-            self.assertIn(mypk, cfg['_pubkeys'])
+            self.assertIn(mypk, cfg["_pubkeys"])
 
 
 class TestCanDevBeReformatted(CiTestCase):
-    warning_file = 'dataloss_warning_readme.txt'
+    warning_file = "dataloss_warning_readme.txt"
 
     def _domock(self, mockpath, sattr=None):
         patcher = mock.patch(mockpath)
@@ -2060,42 +2334,42 @@ class TestCanDevBeReformatted(CiTestCase):
         bypath = {}
         for path, data in devs.items():
             bypath[path] = data
-            if 'realpath' in data:
-                bypath[data['realpath']] = data
-            for ppath, pdata in data.get('partitions', {}).items():
+            if "realpath" in data:
+                bypath[data["realpath"]] = data
+            for ppath, pdata in data.get("partitions", {}).items():
                 bypath[ppath] = pdata
-                if 'realpath' in data:
-                    bypath[pdata['realpath']] = pdata
+                if "realpath" in data:
+                    bypath[pdata["realpath"]] = pdata
 
         def realpath(d):
-            return bypath[d].get('realpath', d)
+            return bypath[d].get("realpath", d)
 
         def partitions_on_device(devpath):
-            parts = bypath.get(devpath, {}).get('partitions', {})
+            parts = bypath.get(devpath, {}).get("partitions", {})
             ret = []
             for path, data in parts.items():
-                ret.append((data.get('num'), realpath(path)))
+                ret.append((data.get("num"), realpath(path)))
             # return sorted by partition number
             return sorted(ret, key=lambda d: d[0])
 
         def mount_cb(device, callback, mtype, update_env_for_mount):
-            self.assertEqual('ntfs', mtype)
-            self.assertEqual('C', update_env_for_mount.get('LANG'))
+            self.assertEqual("ntfs", mtype)
+            self.assertEqual("C", update_env_for_mount.get("LANG"))
             p = self.tmp_dir()
-            for f in bypath.get(device).get('files', []):
+            for f in bypath.get(device).get("files", []):
                 write_file(os.path.join(p, f), content=f)
             return callback(p)
 
         def has_ntfs_fs(device):
-            return bypath.get(device, {}).get('fs') == 'ntfs'
+            return bypath.get(device, {}).get("fs") == "ntfs"
 
         p = MOCKPATH
-        self._domock(p + "_partitions_on_device", 'm_partitions_on_device')
-        self._domock(p + "_has_ntfs_filesystem", 'm_has_ntfs_filesystem')
-        self._domock(p + "util.mount_cb", 'm_mount_cb')
-        self._domock(p + "os.path.realpath", 'm_realpath')
-        self._domock(p + "os.path.exists", 'm_exists')
-        self._domock(p + "util.SeLinuxGuard", 'm_selguard')
+        self._domock(p + "_partitions_on_device", "m_partitions_on_device")
+        self._domock(p + "_has_ntfs_filesystem", "m_has_ntfs_filesystem")
+        self._domock(p + "util.mount_cb", "m_mount_cb")
+        self._domock(p + "os.path.realpath", "m_realpath")
+        self._domock(p + "os.path.exists", "m_exists")
+        self._domock(p + "util.SeLinuxGuard", "m_selguard")
 
         self.m_exists.side_effect = lambda p: p in bypath
         self.m_realpath.side_effect = realpath
@@ -2107,330 +2381,433 @@ class TestCanDevBeReformatted(CiTestCase):
 
     def test_three_partitions_is_false(self):
         """A disk with 3 partitions can not be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1},
-                    '/dev/sda2': {'num': 2},
-                    '/dev/sda3': {'num': 3},
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {"num": 1},
+                        "/dev/sda2": {"num": 2},
+                        "/dev/sda3": {"num": 3},
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertFalse(value)
         self.assertIn("3 or more", msg.lower())
 
     def test_no_partitions_is_false(self):
         """A disk with no partitions can not be formatted."""
-        self.patchup({'/dev/sda': {}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup({"/dev/sda": {}})
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertFalse(value)
         self.assertIn("not partitioned", msg.lower())
 
     def test_two_partitions_not_ntfs_false(self):
         """2 partitions and 2nd not ntfs can not be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1},
-                    '/dev/sda2': {'num': 2, 'fs': 'ext4', 'files': []},
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {"num": 1},
+                        "/dev/sda2": {"num": 2, "fs": "ext4", "files": []},
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertFalse(value)
         self.assertIn("not ntfs", msg.lower())
 
     def test_two_partitions_ntfs_populated_false(self):
         """2 partitions and populated ntfs fs on 2nd can not be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1},
-                    '/dev/sda2': {'num': 2, 'fs': 'ntfs',
-                                  'files': ['secret.txt']},
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {"num": 1},
+                        "/dev/sda2": {
+                            "num": 2,
+                            "fs": "ntfs",
+                            "files": ["secret.txt"],
+                        },
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertFalse(value)
         self.assertIn("files on it", msg.lower())
 
     def test_two_partitions_ntfs_empty_is_true(self):
         """2 partitions and empty ntfs fs on 2nd can be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1},
-                    '/dev/sda2': {'num': 2, 'fs': 'ntfs', 'files': []},
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {"num": 1},
+                        "/dev/sda2": {"num": 2, "fs": "ntfs", "files": []},
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertTrue(value)
         self.assertIn("safe for", msg.lower())
 
     def test_one_partition_not_ntfs_false(self):
         """1 partition witih fs other than ntfs can not be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1, 'fs': 'zfs'},
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {"num": 1, "fs": "zfs"},
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertFalse(value)
         self.assertIn("not ntfs", msg.lower())
 
     def test_one_partition_ntfs_populated_false(self):
         """1 mountable ntfs partition with many files can not be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1, 'fs': 'ntfs',
-                                  'files': ['file1.txt', 'file2.exe']},
-                }}})
-        with mock.patch.object(dsaz.LOG, 'warning') as warning:
-            value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                     preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {
+                            "num": 1,
+                            "fs": "ntfs",
+                            "files": ["file1.txt", "file2.exe"],
+                        },
+                    }
+                }
+            }
+        )
+        with mock.patch.object(dsaz.LOG, "warning") as warning:
+            value, msg = dsaz.can_dev_be_reformatted(
+                "/dev/sda", preserve_ntfs=False
+            )
             wmsg = warning.call_args[0][0]
-            self.assertIn("looks like you're using NTFS on the ephemeral disk",
-                          wmsg)
+            self.assertIn(
+                "looks like you're using NTFS on the ephemeral disk", wmsg
+            )
             self.assertFalse(value)
             self.assertIn("files on it", msg.lower())
 
     def test_one_partition_ntfs_empty_is_true(self):
         """1 mountable ntfs partition and no files can be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1, 'fs': 'ntfs', 'files': []}
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {"num": 1, "fs": "ntfs", "files": []}
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertTrue(value)
         self.assertIn("safe for", msg.lower())
 
     def test_one_partition_ntfs_empty_with_dataloss_file_is_true(self):
         """1 mountable ntfs partition and only warn file can be formatted."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1, 'fs': 'ntfs',
-                                  'files': ['dataloss_warning_readme.txt']}
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=False)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {
+                            "num": 1,
+                            "fs": "ntfs",
+                            "files": ["dataloss_warning_readme.txt"],
+                        }
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=False
+        )
         self.assertTrue(value)
         self.assertIn("safe for", msg.lower())
 
     def test_one_partition_through_realpath_is_true(self):
         """A symlink to a device with 1 ntfs partition can be formatted."""
-        epath = '/dev/disk/cloud/azure_resource'
-        self.patchup({
-            epath: {
-                'realpath': '/dev/sdb',
-                'partitions': {
-                    epath + '-part1': {
-                        'num': 1, 'fs': 'ntfs', 'files': [self.warning_file],
-                        'realpath': '/dev/sdb1'}
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted(epath,
-                                                 preserve_ntfs=False)
+        epath = "/dev/disk/cloud/azure_resource"
+        self.patchup(
+            {
+                epath: {
+                    "realpath": "/dev/sdb",
+                    "partitions": {
+                        epath
+                        + "-part1": {
+                            "num": 1,
+                            "fs": "ntfs",
+                            "files": [self.warning_file],
+                            "realpath": "/dev/sdb1",
+                        }
+                    },
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(epath, preserve_ntfs=False)
         self.assertTrue(value)
         self.assertIn("safe for", msg.lower())
 
     def test_three_partition_through_realpath_is_false(self):
         """A symlink to a device with 3 partitions can not be formatted."""
-        epath = '/dev/disk/cloud/azure_resource'
-        self.patchup({
-            epath: {
-                'realpath': '/dev/sdb',
-                'partitions': {
-                    epath + '-part1': {
-                        'num': 1, 'fs': 'ntfs', 'files': [self.warning_file],
-                        'realpath': '/dev/sdb1'},
-                    epath + '-part2': {'num': 2, 'fs': 'ext3',
-                                       'realpath': '/dev/sdb2'},
-                    epath + '-part3': {'num': 3, 'fs': 'ext',
-                                       'realpath': '/dev/sdb3'}
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted(epath,
-                                                 preserve_ntfs=False)
+        epath = "/dev/disk/cloud/azure_resource"
+        self.patchup(
+            {
+                epath: {
+                    "realpath": "/dev/sdb",
+                    "partitions": {
+                        epath
+                        + "-part1": {
+                            "num": 1,
+                            "fs": "ntfs",
+                            "files": [self.warning_file],
+                            "realpath": "/dev/sdb1",
+                        },
+                        epath
+                        + "-part2": {
+                            "num": 2,
+                            "fs": "ext3",
+                            "realpath": "/dev/sdb2",
+                        },
+                        epath
+                        + "-part3": {
+                            "num": 3,
+                            "fs": "ext",
+                            "realpath": "/dev/sdb3",
+                        },
+                    },
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(epath, preserve_ntfs=False)
         self.assertFalse(value)
         self.assertIn("3 or more", msg.lower())
 
     def test_ntfs_mount_errors_true(self):
         """can_dev_be_reformatted does not fail if NTFS is unknown fstype."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1, 'fs': 'ntfs', 'files': []}
-                }}})
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {"num": 1, "fs": "ntfs", "files": []}
+                    }
+                }
+            }
+        )
 
         error_msgs = [
             "Stderr: mount: unknown filesystem type 'ntfs'",  # RHEL
-            "Stderr: mount: /dev/sdb1: unknown filesystem type 'ntfs'"  # SLES
+            "Stderr: mount: /dev/sdb1: unknown filesystem type 'ntfs'",  # SLES
         ]
 
         for err_msg in error_msgs:
             self.m_mount_cb.side_effect = MountFailedError(
-                "Failed mounting %s to %s due to: \nUnexpected.\n%s" %
-                ('/dev/sda', '/fake-tmp/dir', err_msg))
+                "Failed mounting %s to %s due to: \nUnexpected.\n%s"
+                % ("/dev/sda", "/fake-tmp/dir", err_msg)
+            )
 
-            value, msg = dsaz.can_dev_be_reformatted('/dev/sda',
-                                                     preserve_ntfs=False)
+            value, msg = dsaz.can_dev_be_reformatted(
+                "/dev/sda", preserve_ntfs=False
+            )
             self.assertTrue(value)
-            self.assertIn('cannot mount NTFS, assuming', msg)
+            self.assertIn("cannot mount NTFS, assuming", msg)
 
     def test_never_destroy_ntfs_config_false(self):
         """Normally formattable situation with never_destroy_ntfs set."""
-        self.patchup({
-            '/dev/sda': {
-                'partitions': {
-                    '/dev/sda1': {'num': 1, 'fs': 'ntfs',
-                                  'files': ['dataloss_warning_readme.txt']}
-                }}})
-        value, msg = dsaz.can_dev_be_reformatted("/dev/sda",
-                                                 preserve_ntfs=True)
+        self.patchup(
+            {
+                "/dev/sda": {
+                    "partitions": {
+                        "/dev/sda1": {
+                            "num": 1,
+                            "fs": "ntfs",
+                            "files": ["dataloss_warning_readme.txt"],
+                        }
+                    }
+                }
+            }
+        )
+        value, msg = dsaz.can_dev_be_reformatted(
+            "/dev/sda", preserve_ntfs=True
+        )
         self.assertFalse(value)
-        self.assertIn("config says to never destroy NTFS "
-                      "(datasource.Azure.never_destroy_ntfs)", msg)
+        self.assertIn(
+            "config says to never destroy NTFS "
+            "(datasource.Azure.never_destroy_ntfs)",
+            msg,
+        )
 
 
 class TestClearCachedData(CiTestCase):
-
     def test_clear_cached_attrs_clears_imds(self):
         """All class attributes are reset to defaults, including imds data."""
         tmp = self.tmp_dir()
-        paths = helpers.Paths(
-            {'cloud_dir': tmp, 'run_dir': tmp})
+        paths = helpers.Paths({"cloud_dir": tmp, "run_dir": tmp})
         dsrc = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=paths)
         clean_values = [dsrc.metadata, dsrc.userdata, dsrc._metadata_imds]
-        dsrc.metadata = 'md'
-        dsrc.userdata = 'ud'
-        dsrc._metadata_imds = 'imds'
+        dsrc.metadata = "md"
+        dsrc.userdata = "ud"
+        dsrc._metadata_imds = "imds"
         dsrc._dirty_cache = True
         dsrc.clear_cached_attrs()
         self.assertEqual(
-            [dsrc.metadata, dsrc.userdata, dsrc._metadata_imds],
-            clean_values)
+            [dsrc.metadata, dsrc.userdata, dsrc._metadata_imds], clean_values
+        )
 
 
 class TestAzureNetExists(CiTestCase):
-
     def test_azure_net_must_exist_for_legacy_objpkl(self):
         """DataSourceAzureNet must exist for old obj.pkl files
-           that reference it."""
+        that reference it."""
         self.assertTrue(hasattr(dsaz, "DataSourceAzureNet"))
 
 
 class TestPreprovisioningReadAzureOvfFlag(CiTestCase):
-
     def test_read_azure_ovf_with_true_flag(self):
         """The read_azure_ovf method should set the PreprovisionedVM
-           cfg flag if the proper setting is present."""
+        cfg flag if the proper setting is present."""
         content = construct_valid_ovf_env(
-            platform_settings={"PreprovisionedVm": "True"})
+            platform_settings={"PreprovisionedVm": "True"}
+        )
         ret = dsaz.read_azure_ovf(content)
         cfg = ret[2]
-        self.assertTrue(cfg['PreprovisionedVm'])
+        self.assertTrue(cfg["PreprovisionedVm"])
 
     def test_read_azure_ovf_with_false_flag(self):
         """The read_azure_ovf method should set the PreprovisionedVM
-           cfg flag to false if the proper setting is false."""
+        cfg flag to false if the proper setting is false."""
         content = construct_valid_ovf_env(
-            platform_settings={"PreprovisionedVm": "False"})
+            platform_settings={"PreprovisionedVm": "False"}
+        )
         ret = dsaz.read_azure_ovf(content)
         cfg = ret[2]
-        self.assertFalse(cfg['PreprovisionedVm'])
+        self.assertFalse(cfg["PreprovisionedVm"])
 
     def test_read_azure_ovf_without_flag(self):
         """The read_azure_ovf method should not set the
-           PreprovisionedVM cfg flag."""
+        PreprovisionedVM cfg flag."""
         content = construct_valid_ovf_env()
         ret = dsaz.read_azure_ovf(content)
         cfg = ret[2]
-        self.assertFalse(cfg['PreprovisionedVm'])
+        self.assertFalse(cfg["PreprovisionedVm"])
         self.assertEqual(None, cfg["PreprovisionedVMType"])
 
     def test_read_azure_ovf_with_running_type(self):
         """The read_azure_ovf method should set PreprovisionedVMType
-           cfg flag to Running."""
+        cfg flag to Running."""
         content = construct_valid_ovf_env(
-            platform_settings={"PreprovisionedVMType": "Running",
-                               "PreprovisionedVm": "True"})
+            platform_settings={
+                "PreprovisionedVMType": "Running",
+                "PreprovisionedVm": "True",
+            }
+        )
         ret = dsaz.read_azure_ovf(content)
         cfg = ret[2]
-        self.assertTrue(cfg['PreprovisionedVm'])
-        self.assertEqual("Running", cfg['PreprovisionedVMType'])
+        self.assertTrue(cfg["PreprovisionedVm"])
+        self.assertEqual("Running", cfg["PreprovisionedVMType"])
 
     def test_read_azure_ovf_with_savable_type(self):
         """The read_azure_ovf method should set PreprovisionedVMType
-           cfg flag to Savable."""
+        cfg flag to Savable."""
         content = construct_valid_ovf_env(
-            platform_settings={"PreprovisionedVMType": "Savable",
-                               "PreprovisionedVm": "True"})
+            platform_settings={
+                "PreprovisionedVMType": "Savable",
+                "PreprovisionedVm": "True",
+            }
+        )
         ret = dsaz.read_azure_ovf(content)
         cfg = ret[2]
-        self.assertTrue(cfg['PreprovisionedVm'])
-        self.assertEqual("Savable", cfg['PreprovisionedVMType'])
+        self.assertTrue(cfg["PreprovisionedVm"])
+        self.assertEqual("Savable", cfg["PreprovisionedVMType"])
 
 
-@mock.patch('os.path.isfile')
+@mock.patch("os.path.isfile")
 class TestPreprovisioningShouldReprovision(CiTestCase):
-
     def setUp(self):
         super(TestPreprovisioningShouldReprovision, self).setUp()
         tmp = self.tmp_dir()
-        self.waagent_d = self.tmp_path('/var/lib/waagent', tmp)
-        self.paths = helpers.Paths({'cloud_dir': tmp})
-        dsaz.BUILTIN_DS_CONFIG['data_dir'] = self.waagent_d
+        self.waagent_d = self.tmp_path("/var/lib/waagent", tmp)
+        self.paths = helpers.Paths({"cloud_dir": tmp})
+        dsaz.BUILTIN_DS_CONFIG["data_dir"] = self.waagent_d
 
-    @mock.patch(MOCKPATH + 'util.write_file')
+    @mock.patch(MOCKPATH + "util.write_file")
     def test__should_reprovision_with_true_cfg(self, isfile, write_f):
         """The _should_reprovision method should return true with config
-           flag present."""
+        flag present."""
         isfile.return_value = False
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
-        self.assertTrue(dsa._should_reprovision(
-            (None, None, {'PreprovisionedVm': True}, None)))
+        self.assertTrue(
+            dsa._should_reprovision(
+                (None, None, {"PreprovisionedVm": True}, None)
+            )
+        )
 
     def test__should_reprovision_with_file_existing(self, isfile):
         """The _should_reprovision method should return True if the sentinal
-           exists."""
+        exists."""
         isfile.return_value = True
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
-        self.assertTrue(dsa._should_reprovision(
-            (None, None, {'preprovisionedvm': False}, None)))
+        self.assertTrue(
+            dsa._should_reprovision(
+                (None, None, {"preprovisionedvm": False}, None)
+            )
+        )
 
     def test__should_reprovision_returns_false(self, isfile):
         """The _should_reprovision method should return False
-           if config and sentinal are not present."""
+        if config and sentinal are not present."""
         isfile.return_value = False
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
         self.assertFalse(dsa._should_reprovision((None, None, {}, None)))
 
-    @mock.patch(MOCKPATH + 'util.write_file', autospec=True)
+    @mock.patch(MOCKPATH + "util.write_file", autospec=True)
     def test__should_reprovision_uses_imds_md(self, write_file, isfile):
         """The _should_reprovision method should be able to
         retrieve the preprovisioning VM type from imds metadata"""
         isfile.return_value = False
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
-        self.assertTrue(dsa._should_reprovision(
-            (None, None, {}, None),
-            {'extended': {'compute': {'ppsType': 'Running'}}}))
-        self.assertFalse(dsa._should_reprovision(
-            (None, None, {}, None),
-            {}))
-        self.assertFalse(dsa._should_reprovision(
-            (None, None, {}, None),
-            {'extended': {'compute': {"hasCustomData": False}}}))
-
-    @mock.patch(MOCKPATH + 'DataSourceAzure._poll_imds')
+        self.assertTrue(
+            dsa._should_reprovision(
+                (None, None, {}, None),
+                {"extended": {"compute": {"ppsType": "Running"}}},
+            )
+        )
+        self.assertFalse(dsa._should_reprovision((None, None, {}, None), {}))
+        self.assertFalse(
+            dsa._should_reprovision(
+                (None, None, {}, None),
+                {"extended": {"compute": {"hasCustomData": False}}},
+            )
+        )
+
+    @mock.patch(MOCKPATH + "DataSourceAzure._poll_imds")
     def test_reprovision_calls__poll_imds(self, _poll_imds, isfile):
         """_reprovision will poll IMDS."""
         isfile.return_value = False
         hostname = "myhost"
         username = "myuser"
-        odata = {'HostName': hostname, 'UserName': username}
+        odata = {"HostName": hostname, "UserName": username}
         _poll_imds.return_value = construct_valid_ovf_env(data=odata)
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
         dsa._reprovision()
@@ -2438,18 +2815,19 @@ class TestPreprovisioningShouldReprovision(CiTestCase):
 
 
 class TestPreprovisioningHotAttachNics(CiTestCase):
-
     def setUp(self):
         super(TestPreprovisioningHotAttachNics, self).setUp()
         self.tmp = self.tmp_dir()
-        self.waagent_d = self.tmp_path('/var/lib/waagent', self.tmp)
-        self.paths = helpers.Paths({'cloud_dir': self.tmp})
-        dsaz.BUILTIN_DS_CONFIG['data_dir'] = self.waagent_d
-        self.paths = helpers.Paths({'cloud_dir': self.tmp})
-
-    @mock.patch('cloudinit.sources.helpers.netlink.wait_for_nic_detach_event',
-                autospec=True)
-    @mock.patch(MOCKPATH + 'util.write_file', autospec=True)
+        self.waagent_d = self.tmp_path("/var/lib/waagent", self.tmp)
+        self.paths = helpers.Paths({"cloud_dir": self.tmp})
+        dsaz.BUILTIN_DS_CONFIG["data_dir"] = self.waagent_d
+        self.paths = helpers.Paths({"cloud_dir": self.tmp})
+
+    @mock.patch(
+        "cloudinit.sources.helpers.netlink.wait_for_nic_detach_event",
+        autospec=True,
+    )
+    @mock.patch(MOCKPATH + "util.write_file", autospec=True)
     def test_nic_detach_writes_marker(self, m_writefile, m_detach):
         """When we detect that a nic gets detached, we write a marker for it"""
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
@@ -2458,16 +2836,17 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         m_detach.assert_called_with(nl_sock)
         self.assertEqual(1, m_detach.call_count)
         m_writefile.assert_called_with(
-            dsaz.REPROVISION_NIC_DETACHED_MARKER_FILE, mock.ANY)
+            dsaz.REPROVISION_NIC_DETACHED_MARKER_FILE, mock.ANY
+        )
 
-    @mock.patch(MOCKPATH + 'util.write_file', autospec=True)
-    @mock.patch(MOCKPATH + 'DataSourceAzure.fallback_interface')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4WithReporting')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._report_ready')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._wait_for_nic_detach')
+    @mock.patch(MOCKPATH + "util.write_file", autospec=True)
+    @mock.patch(MOCKPATH + "DataSourceAzure.fallback_interface")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4WithReporting")
+    @mock.patch(MOCKPATH + "DataSourceAzure._report_ready")
+    @mock.patch(MOCKPATH + "DataSourceAzure._wait_for_nic_detach")
     def test_detect_nic_attach_reports_ready_and_waits_for_detach(
-            self, m_detach, m_report_ready, m_dhcp, m_fallback_if,
-            m_writefile):
+        self, m_detach, m_report_ready, m_dhcp, m_fallback_if, m_writefile
+    ):
         """Report ready first and then wait for nic detach"""
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
         dsa._wait_for_all_nics_ready()
@@ -2476,16 +2855,18 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         self.assertEqual(1, m_detach.call_count)
         self.assertEqual(1, m_writefile.call_count)
         self.assertEqual(1, m_dhcp.call_count)
-        m_writefile.assert_called_with(dsaz.REPORTED_READY_MARKER_FILE,
-                                       mock.ANY)
-
-    @mock.patch('os.path.isfile')
-    @mock.patch(MOCKPATH + 'DataSourceAzure.fallback_interface')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4WithReporting')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._report_ready')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._wait_for_nic_detach')
+        m_writefile.assert_called_with(
+            dsaz.REPORTED_READY_MARKER_FILE, mock.ANY
+        )
+
+    @mock.patch("os.path.isfile")
+    @mock.patch(MOCKPATH + "DataSourceAzure.fallback_interface")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4WithReporting")
+    @mock.patch(MOCKPATH + "DataSourceAzure._report_ready")
+    @mock.patch(MOCKPATH + "DataSourceAzure._wait_for_nic_detach")
     def test_detect_nic_attach_skips_report_ready_when_marker_present(
-            self, m_detach, m_report_ready, m_dhcp, m_fallback_if, m_isfile):
+        self, m_detach, m_report_ready, m_dhcp, m_fallback_if, m_isfile
+    ):
         """Skip reporting ready if we already have a marker file."""
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
 
@@ -2499,13 +2880,14 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         self.assertEqual(0, m_dhcp.call_count)
         self.assertEqual(1, m_detach.call_count)
 
-    @mock.patch('os.path.isfile')
-    @mock.patch(MOCKPATH + 'DataSourceAzure.fallback_interface')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4WithReporting')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._report_ready')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._wait_for_nic_detach')
+    @mock.patch("os.path.isfile")
+    @mock.patch(MOCKPATH + "DataSourceAzure.fallback_interface")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4WithReporting")
+    @mock.patch(MOCKPATH + "DataSourceAzure._report_ready")
+    @mock.patch(MOCKPATH + "DataSourceAzure._wait_for_nic_detach")
     def test_detect_nic_attach_skips_nic_detach_when_marker_present(
-            self, m_detach, m_report_ready, m_dhcp, m_fallback_if, m_isfile):
+        self, m_detach, m_report_ready, m_dhcp, m_fallback_if, m_isfile
+    ):
         """Skip wait for nic detach if it already happened."""
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
 
@@ -2516,22 +2898,32 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         self.assertEqual(0, m_dhcp.call_count)
         self.assertEqual(0, m_detach.call_count)
 
-    @mock.patch(MOCKPATH + 'DataSourceAzure.wait_for_link_up', autospec=True)
-    @mock.patch('cloudinit.sources.helpers.netlink.wait_for_nic_attach_event')
-    @mock.patch('cloudinit.sources.net.find_fallback_nic')
-    @mock.patch(MOCKPATH + 'get_metadata_from_imds')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._wait_for_nic_detach')
-    @mock.patch('os.path.isfile')
+    @mock.patch(MOCKPATH + "DataSourceAzure.wait_for_link_up", autospec=True)
+    @mock.patch("cloudinit.sources.helpers.netlink.wait_for_nic_attach_event")
+    @mock.patch("cloudinit.sources.net.find_fallback_nic")
+    @mock.patch(MOCKPATH + "get_metadata_from_imds")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
+    @mock.patch(MOCKPATH + "DataSourceAzure._wait_for_nic_detach")
+    @mock.patch("os.path.isfile")
     def test_wait_for_nic_attach_if_no_fallback_interface(
-            self, m_isfile, m_detach, m_dhcpv4, m_imds, m_fallback_if,
-            m_attach, m_link_up):
+        self,
+        m_isfile,
+        m_detach,
+        m_dhcpv4,
+        m_imds,
+        m_fallback_if,
+        m_attach,
+        m_link_up,
+    ):
         """Wait for nic attach if we do not have a fallback interface"""
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
         lease = {
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}
+            "interface": "eth9",
+            "fixed-address": "192.168.2.9",
+            "routers": "192.168.2.1",
+            "subnet-mask": "255.255.255.0",
+            "unknown-245": "624c3620",
+        }
 
         m_isfile.return_value = True
         m_attach.return_value = "eth0"
@@ -2550,22 +2942,32 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         self.assertEqual(1, m_link_up.call_count)
         m_link_up.assert_called_with(mock.ANY, "eth0")
 
-    @mock.patch(MOCKPATH + 'DataSourceAzure.wait_for_link_up')
-    @mock.patch('cloudinit.sources.helpers.netlink.wait_for_nic_attach_event')
-    @mock.patch('cloudinit.sources.net.find_fallback_nic')
-    @mock.patch(MOCKPATH + 'DataSourceAzure.get_imds_data_with_api_fallback')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
-    @mock.patch(MOCKPATH + 'DataSourceAzure._wait_for_nic_detach')
-    @mock.patch('os.path.isfile')
+    @mock.patch(MOCKPATH + "DataSourceAzure.wait_for_link_up")
+    @mock.patch("cloudinit.sources.helpers.netlink.wait_for_nic_attach_event")
+    @mock.patch("cloudinit.sources.net.find_fallback_nic")
+    @mock.patch(MOCKPATH + "DataSourceAzure.get_imds_data_with_api_fallback")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
+    @mock.patch(MOCKPATH + "DataSourceAzure._wait_for_nic_detach")
+    @mock.patch("os.path.isfile")
     def test_wait_for_nic_attach_multinic_attach(
-            self, m_isfile, m_detach, m_dhcpv4, m_imds, m_fallback_if,
-            m_attach, m_link_up):
+        self,
+        m_isfile,
+        m_detach,
+        m_dhcpv4,
+        m_imds,
+        m_fallback_if,
+        m_attach,
+        m_link_up,
+    ):
         """Wait for nic attach if we do not have a fallback interface"""
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
         lease = {
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}
+            "interface": "eth9",
+            "fixed-address": "192.168.2.9",
+            "routers": "192.168.2.1",
+            "subnet-mask": "255.255.255.0",
+            "unknown-245": "624c3620",
+        }
         m_attach_call_count = 0
 
         def nic_attach_ret(nl_sock, nics_found):
@@ -2580,15 +2982,15 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         # Simulate two NICs by adding the same one twice.
         md = {
             "interface": [
-                IMDS_NETWORK_METADATA['interface'][0],
-                IMDS_NETWORK_METADATA['interface'][0]
+                IMDS_NETWORK_METADATA["interface"][0],
+                IMDS_NETWORK_METADATA["interface"][0],
             ]
         }
 
         def network_metadata_ret(ifname, retries, type, exc_cb, infinite):
             if ifname == "eth0":
                 return md
-            raise requests.Timeout('Fake connection timeout')
+            raise requests.Timeout("Fake connection timeout")
 
         m_isfile.return_value = True
         m_attach.side_effect = nic_attach_ret
@@ -2607,25 +3009,29 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         self.assertEqual(1, m_imds.call_count)
         self.assertEqual(2, m_link_up.call_count)
 
-    @mock.patch(MOCKPATH + 'DataSourceAzure.get_imds_data_with_api_fallback')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
+    @mock.patch(MOCKPATH + "DataSourceAzure.get_imds_data_with_api_fallback")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
     def test_check_if_nic_is_primary_retries_on_failures(
-            self, m_dhcpv4, m_imds):
+        self, m_dhcpv4, m_imds
+    ):
         """Retry polling for network metadata on all failures except timeout
         and network unreachable errors"""
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
         lease = {
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}
+            "interface": "eth9",
+            "fixed-address": "192.168.2.9",
+            "routers": "192.168.2.1",
+            "subnet-mask": "255.255.255.0",
+            "unknown-245": "624c3620",
+        }
 
         eth0Retries = []
         eth1Retries = []
         # Simulate two NICs by adding the same one twice.
         md = {
             "interface": [
-                IMDS_NETWORK_METADATA['interface'][0],
-                IMDS_NETWORK_METADATA['interface'][0]
+                IMDS_NETWORK_METADATA["interface"][0],
+                IMDS_NETWORK_METADATA["interface"][0],
             ]
         }
 
@@ -2645,9 +3051,9 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
                     # We are expected to retry for a certain period for both
                     # timeout errors and network unreachable errors.
                     if _ < 5:
-                        cause = requests.Timeout('Fake connection timeout')
+                        cause = requests.Timeout("Fake connection timeout")
                     else:
-                        cause = requests.ConnectionError('Network Unreachable')
+                        cause = requests.ConnectionError("Network Unreachable")
                     error = url_helper.UrlError(cause=cause)
                     eth1Retries.append(exc_cb("Connection timeout", error))
                 # Should stop retrying after 10 retries
@@ -2679,31 +3085,31 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
             self.assertTrue(eth1Retries[i])
         self.assertFalse(eth1Retries[10])
 
-    @mock.patch('cloudinit.distros.networking.LinuxNetworking.try_set_link_up')
-    def test_wait_for_link_up_returns_if_already_up(
-            self, m_is_link_up):
+    @mock.patch("cloudinit.distros.networking.LinuxNetworking.try_set_link_up")
+    def test_wait_for_link_up_returns_if_already_up(self, m_is_link_up):
         """Waiting for link to be up should return immediately if the link is
-           already up."""
+        already up."""
 
-        distro_cls = distros.fetch('ubuntu')
-        distro = distro_cls('ubuntu', {}, self.paths)
+        distro_cls = distros.fetch("ubuntu")
+        distro = distro_cls("ubuntu", {}, self.paths)
         dsa = dsaz.DataSourceAzure({}, distro=distro, paths=self.paths)
         m_is_link_up.return_value = True
 
         dsa.wait_for_link_up("eth0")
         self.assertEqual(1, m_is_link_up.call_count)
 
-    @mock.patch(MOCKPATH + 'net.is_up', autospec=True)
-    @mock.patch(MOCKPATH + 'util.write_file')
-    @mock.patch('cloudinit.net.read_sys_net')
-    @mock.patch('cloudinit.distros.networking.LinuxNetworking.try_set_link_up')
+    @mock.patch(MOCKPATH + "net.is_up", autospec=True)
+    @mock.patch(MOCKPATH + "util.write_file")
+    @mock.patch("cloudinit.net.read_sys_net")
+    @mock.patch("cloudinit.distros.networking.LinuxNetworking.try_set_link_up")
     def test_wait_for_link_up_checks_link_after_sleep(
-            self, m_try_set_link_up, m_read_sys_net, m_writefile, m_is_up):
+        self, m_try_set_link_up, m_read_sys_net, m_writefile, m_is_up
+    ):
         """Waiting for link to be up should return immediately if the link is
-           already up."""
+        already up."""
 
-        distro_cls = distros.fetch('ubuntu')
-        distro = distro_cls('ubuntu', {}, self.paths)
+        distro_cls = distros.fetch("ubuntu")
+        distro = distro_cls("ubuntu", {}, self.paths)
         dsa = dsaz.DataSourceAzure({}, distro=distro, paths=self.paths)
         m_try_set_link_up.return_value = False
 
@@ -2718,21 +3124,22 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
 
         m_is_up.side_effect = is_up_mock
 
-        with mock.patch('cloudinit.sources.DataSourceAzure.sleep'):
+        with mock.patch("cloudinit.sources.DataSourceAzure.sleep"):
             dsa.wait_for_link_up("eth0")
         self.assertEqual(2, m_try_set_link_up.call_count)
         self.assertEqual(2, m_is_up.call_count)
 
-    @mock.patch(MOCKPATH + 'util.write_file')
-    @mock.patch('cloudinit.net.read_sys_net')
-    @mock.patch('cloudinit.distros.networking.LinuxNetworking.try_set_link_up')
+    @mock.patch(MOCKPATH + "util.write_file")
+    @mock.patch("cloudinit.net.read_sys_net")
+    @mock.patch("cloudinit.distros.networking.LinuxNetworking.try_set_link_up")
     def test_wait_for_link_up_writes_to_device_file(
-            self, m_is_link_up, m_read_sys_net, m_writefile):
+        self, m_is_link_up, m_read_sys_net, m_writefile
+    ):
         """Waiting for link to be up should return immediately if the link is
-           already up."""
+        already up."""
 
-        distro_cls = distros.fetch('ubuntu')
-        distro = distro_cls('ubuntu', {}, self.paths)
+        distro_cls = distros.fetch("ubuntu")
+        distro = distro_cls("ubuntu", {}, self.paths)
         dsa = dsaz.DataSourceAzure({}, distro=distro, paths=self.paths)
 
         callcount = 0
@@ -2751,48 +3158,59 @@ class TestPreprovisioningHotAttachNics(CiTestCase):
         self.assertEqual(1, m_read_sys_net.call_count)
         self.assertEqual(2, m_writefile.call_count)
 
-    @mock.patch('cloudinit.sources.helpers.netlink.'
-                'create_bound_netlink_socket')
+    @mock.patch(
+        "cloudinit.sources.helpers.netlink.create_bound_netlink_socket"
+    )
     def test_wait_for_all_nics_ready_raises_if_socket_fails(self, m_socket):
         """Waiting for all nics should raise exception if netlink socket
-           creation fails."""
+        creation fails."""
 
         m_socket.side_effect = netlink.NetlinkCreateSocketError
-        distro_cls = distros.fetch('ubuntu')
-        distro = distro_cls('ubuntu', {}, self.paths)
+        distro_cls = distros.fetch("ubuntu")
+        distro = distro_cls("ubuntu", {}, self.paths)
         dsa = dsaz.DataSourceAzure({}, distro=distro, paths=self.paths)
 
-        self.assertRaises(netlink.NetlinkCreateSocketError,
-                          dsa._wait_for_all_nics_ready)
+        self.assertRaises(
+            netlink.NetlinkCreateSocketError, dsa._wait_for_all_nics_ready
+        )
         # dsa._wait_for_all_nics_ready()
 
 
-@mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network')
-@mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
-@mock.patch('cloudinit.sources.helpers.netlink.'
-            'wait_for_media_disconnect_connect')
-@mock.patch('requests.Session.request')
-@mock.patch(MOCKPATH + 'DataSourceAzure._report_ready')
+@mock.patch("cloudinit.net.dhcp.EphemeralIPv4Network")
+@mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
+@mock.patch(
+    "cloudinit.sources.helpers.netlink.wait_for_media_disconnect_connect"
+)
+@mock.patch("requests.Session.request")
+@mock.patch(MOCKPATH + "DataSourceAzure._report_ready")
 class TestPreprovisioningPollIMDS(CiTestCase):
-
     def setUp(self):
         super(TestPreprovisioningPollIMDS, self).setUp()
         self.tmp = self.tmp_dir()
-        self.waagent_d = self.tmp_path('/var/lib/waagent', self.tmp)
-        self.paths = helpers.Paths({'cloud_dir': self.tmp})
-        dsaz.BUILTIN_DS_CONFIG['data_dir'] = self.waagent_d
-
-    @mock.patch('time.sleep', mock.MagicMock())
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
-    def test_poll_imds_re_dhcp_on_timeout(self, m_dhcpv4, m_report_ready,
-                                          m_request, m_media_switch, m_dhcp,
-                                          m_net):
+        self.waagent_d = self.tmp_path("/var/lib/waagent", self.tmp)
+        self.paths = helpers.Paths({"cloud_dir": self.tmp})
+        dsaz.BUILTIN_DS_CONFIG["data_dir"] = self.waagent_d
+
+    @mock.patch("time.sleep", mock.MagicMock())
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
+    def test_poll_imds_re_dhcp_on_timeout(
+        self,
+        m_dhcpv4,
+        m_report_ready,
+        m_request,
+        m_media_switch,
+        m_dhcp,
+        m_net,
+    ):
         """The poll_imds will retry DHCP on IMDS timeout."""
-        report_file = self.tmp_path('report_marker', self.tmp)
+        report_file = self.tmp_path("report_marker", self.tmp)
         lease = {
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}
+            "interface": "eth9",
+            "fixed-address": "192.168.2.9",
+            "routers": "192.168.2.1",
+            "subnet-mask": "255.255.255.0",
+            "unknown-245": "624c3620",
+        }
         m_dhcp.return_value = [lease]
         m_media_switch.return_value = None
         dhcp_ctx = mock.MagicMock(lease=lease)
@@ -2804,7 +3222,7 @@ class TestPreprovisioningPollIMDS(CiTestCase):
         def fake_timeout_once(**kwargs):
             self.tries += 1
             if self.tries == 1:
-                raise requests.Timeout('Fake connection timeout')
+                raise requests.Timeout("Fake connection timeout")
             elif self.tries in (2, 3):
                 response = requests.Response()
                 response.status_code = 404 if self.tries == 2 else 410
@@ -2817,41 +3235,54 @@ class TestPreprovisioningPollIMDS(CiTestCase):
         m_request.side_effect = fake_timeout_once
 
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
-        with mock.patch(MOCKPATH + 'REPORTED_READY_MARKER_FILE', report_file):
+        with mock.patch(MOCKPATH + "REPORTED_READY_MARKER_FILE", report_file):
             dsa._poll_imds()
         self.assertEqual(m_report_ready.call_count, 1)
         m_report_ready.assert_called_with(lease=lease)
-        self.assertEqual(3, m_dhcpv4.call_count, 'Expected 3 DHCP calls')
-        self.assertEqual(4, self.tries, 'Expected 4 total reads from IMDS')
+        self.assertEqual(3, m_dhcpv4.call_count, "Expected 3 DHCP calls")
+        self.assertEqual(4, self.tries, "Expected 4 total reads from IMDS")
 
-    @mock.patch('os.path.isfile')
+    @mock.patch("os.path.isfile")
     def test_poll_imds_skips_dhcp_if_ctx_present(
-            self, m_isfile, report_ready_func, fake_resp, m_media_switch,
-            m_dhcp, m_net):
+        self,
+        m_isfile,
+        report_ready_func,
+        fake_resp,
+        m_media_switch,
+        m_dhcp,
+        m_net,
+    ):
         """The poll_imds function should reuse the dhcp ctx if it is already
-           present. This happens when we wait for nic to be hot-attached before
-           polling for reprovisiondata. Note that if this ctx is set when
-           _poll_imds is called, then it is not expected to be waiting for
-           media_disconnect_connect either."""
-        report_file = self.tmp_path('report_marker', self.tmp)
+        present. This happens when we wait for nic to be hot-attached before
+        polling for reprovisiondata. Note that if this ctx is set when
+        _poll_imds is called, then it is not expected to be waiting for
+        media_disconnect_connect either."""
+        report_file = self.tmp_path("report_marker", self.tmp)
         m_isfile.return_value = True
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
         dsa._ephemeral_dhcp_ctx = "Dummy dhcp ctx"
-        with mock.patch(MOCKPATH + 'REPORTED_READY_MARKER_FILE', report_file):
+        with mock.patch(MOCKPATH + "REPORTED_READY_MARKER_FILE", report_file):
             dsa._poll_imds()
         self.assertEqual(0, m_dhcp.call_count)
         self.assertEqual(0, m_media_switch.call_count)
 
-    @mock.patch('os.path.isfile')
-    @mock.patch(MOCKPATH + 'EphemeralDHCPv4')
+    @mock.patch("os.path.isfile")
+    @mock.patch(MOCKPATH + "EphemeralDHCPv4")
     def test_poll_imds_does_dhcp_on_retries_if_ctx_present(
-            self, m_ephemeral_dhcpv4, m_isfile, report_ready_func, m_request,
-            m_media_switch, m_dhcp, m_net):
+        self,
+        m_ephemeral_dhcpv4,
+        m_isfile,
+        report_ready_func,
+        m_request,
+        m_media_switch,
+        m_dhcp,
+        m_net,
+    ):
         """The poll_imds function should reuse the dhcp ctx if it is already
-           present. This happens when we wait for nic to be hot-attached before
-           polling for reprovisiondata. Note that if this ctx is set when
-           _poll_imds is called, then it is not expected to be waiting for
-           media_disconnect_connect either."""
+        present. This happens when we wait for nic to be hot-attached before
+        polling for reprovisiondata. Note that if this ctx is set when
+        _poll_imds is called, then it is not expected to be waiting for
+        media_disconnect_connect either."""
 
         tries = 0
 
@@ -2859,15 +3290,16 @@ class TestPreprovisioningPollIMDS(CiTestCase):
             nonlocal tries
             tries += 1
             if tries == 1:
-                raise requests.Timeout('Fake connection timeout')
+                raise requests.Timeout("Fake connection timeout")
             return mock.MagicMock(status_code=200, text="good", content="good")
 
         m_request.side_effect = fake_timeout_once
-        report_file = self.tmp_path('report_marker', self.tmp)
+        report_file = self.tmp_path("report_marker", self.tmp)
         m_isfile.return_value = True
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
-        with mock.patch(MOCKPATH + 'REPORTED_READY_MARKER_FILE', report_file),\
-                mock.patch.object(dsa, '_ephemeral_dhcp_ctx') as m_dhcp_ctx:
+        with mock.patch(
+            MOCKPATH + "REPORTED_READY_MARKER_FILE", report_file
+        ), mock.patch.object(dsa, "_ephemeral_dhcp_ctx") as m_dhcp_ctx:
             m_dhcp_ctx.obtain_lease.return_value = "Dummy lease"
             dsa._ephemeral_dhcp_ctx = m_dhcp_ctx
             dsa._poll_imds()
@@ -2877,145 +3309,189 @@ class TestPreprovisioningPollIMDS(CiTestCase):
         self.assertEqual(2, m_request.call_count)
 
     def test_does_not_poll_imds_report_ready_when_marker_file_exists(
-            self, m_report_ready, m_request, m_media_switch, m_dhcp, m_net):
+        self, m_report_ready, m_request, m_media_switch, m_dhcp, m_net
+    ):
         """poll_imds should not call report ready when the reported ready
         marker file exists"""
-        report_file = self.tmp_path('report_marker', self.tmp)
-        write_file(report_file, content='dont run report_ready :)')
-        m_dhcp.return_value = [{
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}]
+        report_file = self.tmp_path("report_marker", self.tmp)
+        write_file(report_file, content="dont run report_ready :)")
+        m_dhcp.return_value = [
+            {
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+                "unknown-245": "624c3620",
+            }
+        ]
         m_media_switch.return_value = None
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
-        with mock.patch(MOCKPATH + 'REPORTED_READY_MARKER_FILE', report_file):
+        with mock.patch(MOCKPATH + "REPORTED_READY_MARKER_FILE", report_file):
             dsa._poll_imds()
         self.assertEqual(m_report_ready.call_count, 0)
 
     def test_poll_imds_report_ready_success_writes_marker_file(
-            self, m_report_ready, m_request, m_media_switch, m_dhcp, m_net):
+        self, m_report_ready, m_request, m_media_switch, m_dhcp, m_net
+    ):
         """poll_imds should write the report_ready marker file if
         reporting ready succeeds"""
-        report_file = self.tmp_path('report_marker', self.tmp)
-        m_dhcp.return_value = [{
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}]
+        report_file = self.tmp_path("report_marker", self.tmp)
+        m_dhcp.return_value = [
+            {
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+                "unknown-245": "624c3620",
+            }
+        ]
         m_media_switch.return_value = None
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
         self.assertFalse(os.path.exists(report_file))
-        with mock.patch(MOCKPATH + 'REPORTED_READY_MARKER_FILE', report_file):
+        with mock.patch(MOCKPATH + "REPORTED_READY_MARKER_FILE", report_file):
             dsa._poll_imds()
         self.assertEqual(m_report_ready.call_count, 1)
         self.assertTrue(os.path.exists(report_file))
 
     def test_poll_imds_report_ready_failure_raises_exc_and_doesnt_write_marker(
-            self, m_report_ready, m_request, m_media_switch, m_dhcp, m_net):
+        self, m_report_ready, m_request, m_media_switch, m_dhcp, m_net
+    ):
         """poll_imds should write the report_ready marker file if
         reporting ready succeeds"""
-        report_file = self.tmp_path('report_marker', self.tmp)
-        m_dhcp.return_value = [{
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}]
+        report_file = self.tmp_path("report_marker", self.tmp)
+        m_dhcp.return_value = [
+            {
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+                "unknown-245": "624c3620",
+            }
+        ]
         m_media_switch.return_value = None
         m_report_ready.return_value = False
         dsa = dsaz.DataSourceAzure({}, distro=None, paths=self.paths)
         self.assertFalse(os.path.exists(report_file))
-        with mock.patch(MOCKPATH + 'REPORTED_READY_MARKER_FILE', report_file):
-            self.assertRaises(
-                InvalidMetaDataException,
-                dsa._poll_imds)
+        with mock.patch(MOCKPATH + "REPORTED_READY_MARKER_FILE", report_file):
+            self.assertRaises(InvalidMetaDataException, dsa._poll_imds)
         self.assertEqual(m_report_ready.call_count, 1)
         self.assertFalse(os.path.exists(report_file))
 
 
-@mock.patch(MOCKPATH + 'DataSourceAzure._report_ready', mock.MagicMock())
-@mock.patch(MOCKPATH + 'subp.subp', mock.MagicMock())
-@mock.patch(MOCKPATH + 'util.write_file', mock.MagicMock())
-@mock.patch('cloudinit.sources.helpers.netlink.'
-            'wait_for_media_disconnect_connect')
-@mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network', autospec=True)
-@mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
-@mock.patch('requests.Session.request')
+@mock.patch(MOCKPATH + "DataSourceAzure._report_ready", mock.MagicMock())
+@mock.patch(MOCKPATH + "subp.subp", mock.MagicMock())
+@mock.patch(MOCKPATH + "util.write_file", mock.MagicMock())
+@mock.patch(
+    "cloudinit.sources.helpers.netlink.wait_for_media_disconnect_connect"
+)
+@mock.patch("cloudinit.net.dhcp.EphemeralIPv4Network", autospec=True)
+@mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
+@mock.patch("requests.Session.request")
 class TestAzureDataSourcePreprovisioning(CiTestCase):
-
     def setUp(self):
         super(TestAzureDataSourcePreprovisioning, self).setUp()
         tmp = self.tmp_dir()
-        self.waagent_d = self.tmp_path('/var/lib/waagent', tmp)
-        self.paths = helpers.Paths({'cloud_dir': tmp})
-        dsaz.BUILTIN_DS_CONFIG['data_dir'] = self.waagent_d
+        self.waagent_d = self.tmp_path("/var/lib/waagent", tmp)
+        self.paths = helpers.Paths({"cloud_dir": tmp})
+        dsaz.BUILTIN_DS_CONFIG["data_dir"] = self.waagent_d
 
-    def test_poll_imds_returns_ovf_env(self, m_request,
-                                       m_dhcp, m_net,
-                                       m_media_switch):
+    def test_poll_imds_returns_ovf_env(
+        self, m_request, m_dhcp, m_net, m_media_switch
+    ):
         """The _poll_imds method should return the ovf_env.xml."""
         m_media_switch.return_value = None
-        m_dhcp.return_value = [{
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0'}]
-        url = 'http://{0}/metadata/reprovisiondata?api-version=2019-06-01'
+        m_dhcp.return_value = [
+            {
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+            }
+        ]
+        url = "http://{0}/metadata/reprovisiondata?api-version=2019-06-01"
         host = "169.254.169.254"
         full_url = url.format(host)
-        m_request.return_value = mock.MagicMock(status_code=200, text="ovf",
-                                                content="ovf")
+        m_request.return_value = mock.MagicMock(
+            status_code=200, text="ovf", content="ovf"
+        )
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
         self.assertTrue(len(dsa._poll_imds()) > 0)
-        self.assertEqual(m_request.call_args_list,
-                         [mock.call(allow_redirects=True,
-                                    headers={'Metadata': 'true',
-                                             'User-Agent':
-                                             'Cloud-Init/%s' % vs()
-                                             }, method='GET',
-                                    timeout=dsaz.IMDS_TIMEOUT_IN_SECONDS,
-                                    url=full_url)])
+        self.assertEqual(
+            m_request.call_args_list,
+            [
+                mock.call(
+                    allow_redirects=True,
+                    headers={
+                        "Metadata": "true",
+                        "User-Agent": "Cloud-Init/%s" % vs(),
+                    },
+                    method="GET",
+                    timeout=dsaz.IMDS_TIMEOUT_IN_SECONDS,
+                    url=full_url,
+                )
+            ],
+        )
         self.assertEqual(m_dhcp.call_count, 2)
         m_net.assert_any_call(
-            broadcast='192.168.2.255', interface='eth9', ip='192.168.2.9',
-            prefix_or_mask='255.255.255.0', router='192.168.2.1',
-            static_routes=None)
+            broadcast="192.168.2.255",
+            interface="eth9",
+            ip="192.168.2.9",
+            prefix_or_mask="255.255.255.0",
+            router="192.168.2.1",
+            static_routes=None,
+        )
         self.assertEqual(m_net.call_count, 2)
 
-    def test__reprovision_calls__poll_imds(self, m_request,
-                                           m_dhcp, m_net,
-                                           m_media_switch):
+    def test__reprovision_calls__poll_imds(
+        self, m_request, m_dhcp, m_net, m_media_switch
+    ):
         """The _reprovision method should call poll IMDS."""
         m_media_switch.return_value = None
-        m_dhcp.return_value = [{
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'unknown-245': '624c3620'}]
-        url = 'http://{0}/metadata/reprovisiondata?api-version=2019-06-01'
+        m_dhcp.return_value = [
+            {
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+                "unknown-245": "624c3620",
+            }
+        ]
+        url = "http://{0}/metadata/reprovisiondata?api-version=2019-06-01"
         host = "169.254.169.254"
         full_url = url.format(host)
         hostname = "myhost"
         username = "myuser"
-        odata = {'HostName': hostname, 'UserName': username}
+        odata = {"HostName": hostname, "UserName": username}
         content = construct_valid_ovf_env(data=odata)
-        m_request.return_value = mock.MagicMock(status_code=200, text=content,
-                                                content=content)
+        m_request.return_value = mock.MagicMock(
+            status_code=200, text=content, content=content
+        )
         dsa = dsaz.DataSourceAzure({}, distro=mock.Mock(), paths=self.paths)
         md, _ud, cfg, _d = dsa._reprovision()
-        self.assertEqual(md['local-hostname'], hostname)
-        self.assertEqual(cfg['system_info']['default_user']['name'], username)
+        self.assertEqual(md["local-hostname"], hostname)
+        self.assertEqual(cfg["system_info"]["default_user"]["name"], username)
         self.assertIn(
             mock.call(
                 allow_redirects=True,
                 headers={
-                    'Metadata': 'true',
-                    'User-Agent': 'Cloud-Init/%s' % vs()
+                    "Metadata": "true",
+                    "User-Agent": "Cloud-Init/%s" % vs(),
                 },
-                method='GET',
+                method="GET",
                 timeout=dsaz.IMDS_TIMEOUT_IN_SECONDS,
-                url=full_url
+                url=full_url,
             ),
-            m_request.call_args_list)
+            m_request.call_args_list,
+        )
         self.assertEqual(m_dhcp.call_count, 2)
         m_net.assert_any_call(
-            broadcast='192.168.2.255', interface='eth9', ip='192.168.2.9',
-            prefix_or_mask='255.255.255.0', router='192.168.2.1',
-            static_routes=None)
+            broadcast="192.168.2.255",
+            interface="eth9",
+            ip="192.168.2.9",
+            prefix_or_mask="255.255.255.0",
+            router="192.168.2.1",
+            static_routes=None,
+        )
         self.assertEqual(m_net.call_count, 2)
 
 
@@ -3029,36 +3505,42 @@ class TestRemoveUbuntuNetworkConfigScripts(CiTestCase):
 
     def test_remove_network_scripts_removes_both_files_and_directories(self):
         """Any files or directories in paths are removed when present."""
-        file1 = self.tmp_path('file1', dir=self.tmp)
-        subdir = self.tmp_path('sub1', dir=self.tmp)
-        subfile = self.tmp_path('leaf1', dir=subdir)
-        write_file(file1, 'file1content')
-        write_file(subfile, 'leafcontent')
+        file1 = self.tmp_path("file1", dir=self.tmp)
+        subdir = self.tmp_path("sub1", dir=self.tmp)
+        subfile = self.tmp_path("leaf1", dir=subdir)
+        write_file(file1, "file1content")
+        write_file(subfile, "leafcontent")
         dsaz.maybe_remove_ubuntu_network_config_scripts(paths=[subdir, file1])
 
         for path in (file1, subdir, subfile):
-            self.assertFalse(os.path.exists(path),
-                             'Found unremoved: %s' % path)
+            self.assertFalse(
+                os.path.exists(path), "Found unremoved: %s" % path
+            )
 
         expected_logs = [
-            'INFO: Removing Ubuntu extended network scripts because cloud-init'
-            ' updates Azure network configuration on the following events:'
+            "INFO: Removing Ubuntu extended network scripts because cloud-init"
+            " updates Azure network configuration on the following events:"
             " ['boot', 'boot-legacy']",
-            'Recursively deleting %s' % subdir,
-            'Attempting to remove %s' % file1]
+            "Recursively deleting %s" % subdir,
+            "Attempting to remove %s" % file1,
+        ]
         for log in expected_logs:
             self.assertIn(log, self.logs.getvalue())
 
     def test_remove_network_scripts_only_attempts_removal_if_path_exists(self):
         """Any files or directories absent are skipped without error."""
-        dsaz.maybe_remove_ubuntu_network_config_scripts(paths=[
-            self.tmp_path('nodirhere/', dir=self.tmp),
-            self.tmp_path('notfilehere', dir=self.tmp)])
-        self.assertNotIn('/not/a', self.logs.getvalue())  # No delete logs
-
-    @mock.patch(MOCKPATH + 'os.path.exists')
-    def test_remove_network_scripts_default_removes_stock_scripts(self,
-                                                                  m_exists):
+        dsaz.maybe_remove_ubuntu_network_config_scripts(
+            paths=[
+                self.tmp_path("nodirhere/", dir=self.tmp),
+                self.tmp_path("notfilehere", dir=self.tmp),
+            ]
+        )
+        self.assertNotIn("/not/a", self.logs.getvalue())  # No delete logs
+
+    @mock.patch(MOCKPATH + "os.path.exists")
+    def test_remove_network_scripts_default_removes_stock_scripts(
+        self, m_exists
+    ):
         """Azure's stock ubuntu image scripts and artifacts are removed."""
         # Report path absent on all to avoid delete operation
         m_exists.return_value = False
@@ -3070,24 +3552,25 @@ class TestRemoveUbuntuNetworkConfigScripts(CiTestCase):
 
 class TestWBIsPlatformViable(CiTestCase):
     """White box tests for _is_platform_viable."""
+
     with_logs = True
 
-    @mock.patch(MOCKPATH + 'dmi.read_dmi_data')
+    @mock.patch(MOCKPATH + "dmi.read_dmi_data")
     def test_true_on_non_azure_chassis(self, m_read_dmi_data):
         """Return True if DMI chassis-asset-tag is AZURE_CHASSIS_ASSET_TAG."""
         m_read_dmi_data.return_value = dsaz.AZURE_CHASSIS_ASSET_TAG
-        self.assertTrue(dsaz._is_platform_viable('doesnotmatter'))
+        self.assertTrue(dsaz._is_platform_viable("doesnotmatter"))
 
-    @mock.patch(MOCKPATH + 'os.path.exists')
-    @mock.patch(MOCKPATH + 'dmi.read_dmi_data')
+    @mock.patch(MOCKPATH + "os.path.exists")
+    @mock.patch(MOCKPATH + "dmi.read_dmi_data")
     def test_true_on_azure_ovf_env_in_seed_dir(self, m_read_dmi_data, m_exist):
         """Return True if ovf-env.xml exists in known seed dirs."""
         # Non-matching Azure chassis-asset-tag
-        m_read_dmi_data.return_value = dsaz.AZURE_CHASSIS_ASSET_TAG + 'X'
+        m_read_dmi_data.return_value = dsaz.AZURE_CHASSIS_ASSET_TAG + "X"
 
         m_exist.return_value = True
-        self.assertTrue(dsaz._is_platform_viable('/some/seed/dir'))
-        m_exist.called_once_with('/other/seed/dir')
+        self.assertTrue(dsaz._is_platform_viable("/some/seed/dir"))
+        m_exist.called_once_with("/other/seed/dir")
 
     def test_false_on_no_matching_azure_criteria(self):
         """Report non-azure on unmatched asset tag, ovf-env absent and no dev.
@@ -3096,17 +3579,25 @@ class TestWBIsPlatformViable(CiTestCase):
         AZURE_CHASSIS_ASSET_TAG, no ovf-env.xml files exist in known seed dirs
         and no devices have a label starting with prefix 'rd_rdfe_'.
         """
-        self.assertFalse(wrap_and_call(
-            MOCKPATH,
-            {'os.path.exists': False,
-             # Non-matching Azure chassis-asset-tag
-             'dmi.read_dmi_data': dsaz.AZURE_CHASSIS_ASSET_TAG + 'X',
-             'subp.which': None},
-            dsaz._is_platform_viable, 'doesnotmatter'))
+        self.assertFalse(
+            wrap_and_call(
+                MOCKPATH,
+                {
+                    "os.path.exists": False,
+                    # Non-matching Azure chassis-asset-tag
+                    "dmi.read_dmi_data": dsaz.AZURE_CHASSIS_ASSET_TAG + "X",
+                    "subp.which": None,
+                },
+                dsaz._is_platform_viable,
+                "doesnotmatter",
+            )
+        )
         self.assertIn(
             "DEBUG: Non-Azure DMI asset tag '{0}' discovered.\n".format(
-                dsaz.AZURE_CHASSIS_ASSET_TAG + 'X'),
-            self.logs.getvalue())
+                dsaz.AZURE_CHASSIS_ASSET_TAG + "X"
+            ),
+            self.logs.getvalue(),
+        )
 
 
 class TestRandomSeed(CiTestCase):
@@ -3120,13 +3611,14 @@ class TestRandomSeed(CiTestCase):
         path = resourceLocation("azure/non_unicode_random_string")
         result = dsaz._get_random_seed(path)
 
-        obj = {'seed': result}
+        obj = {"seed": result}
         try:
             serialized = json_dumps(obj)
             deserialized = load_json(serialized)
         except UnicodeDecodeError:
             self.fail("Non-serializable random seed returned")
 
-        self.assertEqual(deserialized['seed'], result)
+        self.assertEqual(deserialized["seed"], result)
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_azure_helper.py b/tests/unittests/sources/test_azure_helper.py
index 24c582c2..6f7f2890 100644
--- a/tests/unittests/sources/test_azure_helper.py
+++ b/tests/unittests/sources/test_azure_helper.py
@@ -9,10 +9,9 @@ from xml.etree import ElementTree
 from xml.sax.saxutils import escape, unescape
 
 from cloudinit.sources.helpers import azure as azure_helper
-from tests.unittests.helpers import CiTestCase, ExitStack, mock, populate_dir
-
-from cloudinit.util import load_file
 from cloudinit.sources.helpers.azure import WALinuxAgentShim as wa_shim
+from cloudinit.util import load_file
+from tests.unittests.helpers import CiTestCase, ExitStack, mock, populate_dir
 
 GOAL_STATE_TEMPLATE = """\
 <?xml version="1.0" encoding="utf-8"?>
@@ -52,7 +51,7 @@ GOAL_STATE_TEMPLATE = """\
 </GoalState>
 """
 
-HEALTH_REPORT_XML_TEMPLATE = '''\
+HEALTH_REPORT_XML_TEMPLATE = """\
 <?xml version="1.0" encoding="utf-8"?>
 <Health xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema">
@@ -70,14 +69,16 @@ HEALTH_REPORT_XML_TEMPLATE = '''\
     </RoleInstanceList>
   </Container>
 </Health>
-'''
+"""
 
-HEALTH_DETAIL_SUBSECTION_XML_TEMPLATE = dedent('''\
+HEALTH_DETAIL_SUBSECTION_XML_TEMPLATE = dedent(
+    """\
     <Details>
       <SubStatus>{health_substatus}</SubStatus>
       <Description>{health_description}</Description>
     </Details>
-    ''')
+    """
+)
 
 HEALTH_REPORT_DESCRIPTION_TRIM_LEN = 512
 
@@ -87,24 +88,27 @@ class SentinelException(Exception):
 
 
 class TestFindEndpoint(CiTestCase):
-
     def setUp(self):
         super(TestFindEndpoint, self).setUp()
         patches = ExitStack()
         self.addCleanup(patches.close)
 
         self.load_file = patches.enter_context(
-            mock.patch.object(azure_helper.util, 'load_file'))
+            mock.patch.object(azure_helper.util, "load_file")
+        )
 
         self.dhcp_options = patches.enter_context(
-            mock.patch.object(wa_shim, '_load_dhclient_json'))
+            mock.patch.object(wa_shim, "_load_dhclient_json")
+        )
 
         self.networkd_leases = patches.enter_context(
-            mock.patch.object(wa_shim, '_networkd_get_value_from_leases'))
+            mock.patch.object(wa_shim, "_networkd_get_value_from_leases")
+        )
         self.networkd_leases.return_value = None
 
     def test_missing_file(self):
-        """wa_shim find_endpoint uses default endpoint if leasefile not found
+        """wa_shim find_endpoint uses default endpoint if
+        leasefile not found
         """
         self.assertEqual(wa_shim.find_endpoint(), "168.63.129.16")
 
@@ -112,80 +116,93 @@ class TestFindEndpoint(CiTestCase):
         """wa_shim find_endpoint uses default endpoint if leasefile is found
         but does not contain DHCP Option 245 (whose value is the endpoint)
         """
-        self.load_file.return_value = ''
-        self.dhcp_options.return_value = {'eth0': {'key': 'value'}}
+        self.load_file.return_value = ""
+        self.dhcp_options.return_value = {"eth0": {"key": "value"}}
         self.assertEqual(wa_shim.find_endpoint(), "168.63.129.16")
 
     @staticmethod
     def _build_lease_content(encoded_address):
         endpoint = azure_helper._get_dhcp_endpoint_option_name()
-        return '\n'.join([
-            'lease {',
-            ' interface "eth0";',
-            ' option {0} {1};'.format(endpoint, encoded_address),
-            '}'])
+        return "\n".join(
+            [
+                "lease {",
+                ' interface "eth0";',
+                " option {0} {1};".format(endpoint, encoded_address),
+                "}",
+            ]
+        )
 
     def test_from_dhcp_client(self):
         self.dhcp_options.return_value = {"eth0": {"unknown_245": "5:4:3:2"}}
-        self.assertEqual('5.4.3.2', wa_shim.find_endpoint(None))
+        self.assertEqual("5.4.3.2", wa_shim.find_endpoint(None))
 
     def test_latest_lease_used(self):
-        encoded_addresses = ['5:4:3:2', '4:3:2:1']
-        file_content = '\n'.join([self._build_lease_content(encoded_address)
-                                  for encoded_address in encoded_addresses])
+        encoded_addresses = ["5:4:3:2", "4:3:2:1"]
+        file_content = "\n".join(
+            [
+                self._build_lease_content(encoded_address)
+                for encoded_address in encoded_addresses
+            ]
+        )
         self.load_file.return_value = file_content
-        self.assertEqual(encoded_addresses[-1].replace(':', '.'),
-                         wa_shim.find_endpoint("foobar"))
+        self.assertEqual(
+            encoded_addresses[-1].replace(":", "."),
+            wa_shim.find_endpoint("foobar"),
+        )
 
 
 class TestExtractIpAddressFromLeaseValue(CiTestCase):
-
     def test_hex_string(self):
-        ip_address, encoded_address = '98.76.54.32', '62:4c:36:20'
+        ip_address, encoded_address = "98.76.54.32", "62:4c:36:20"
         self.assertEqual(
-            ip_address, wa_shim.get_ip_from_lease_value(encoded_address))
+            ip_address, wa_shim.get_ip_from_lease_value(encoded_address)
+        )
 
     def test_hex_string_with_single_character_part(self):
-        ip_address, encoded_address = '4.3.2.1', '4:3:2:1'
+        ip_address, encoded_address = "4.3.2.1", "4:3:2:1"
         self.assertEqual(
-            ip_address, wa_shim.get_ip_from_lease_value(encoded_address))
+            ip_address, wa_shim.get_ip_from_lease_value(encoded_address)
+        )
 
     def test_packed_string(self):
-        ip_address, encoded_address = '98.76.54.32', 'bL6 '
+        ip_address, encoded_address = "98.76.54.32", "bL6 "
         self.assertEqual(
-            ip_address, wa_shim.get_ip_from_lease_value(encoded_address))
+            ip_address, wa_shim.get_ip_from_lease_value(encoded_address)
+        )
 
     def test_packed_string_with_escaped_quote(self):
-        ip_address, encoded_address = '100.72.34.108', 'dH\\"l'
+        ip_address, encoded_address = "100.72.34.108", 'dH\\"l'
         self.assertEqual(
-            ip_address, wa_shim.get_ip_from_lease_value(encoded_address))
+            ip_address, wa_shim.get_ip_from_lease_value(encoded_address)
+        )
 
     def test_packed_string_containing_a_colon(self):
-        ip_address, encoded_address = '100.72.58.108', 'dH:l'
+        ip_address, encoded_address = "100.72.58.108", "dH:l"
         self.assertEqual(
-            ip_address, wa_shim.get_ip_from_lease_value(encoded_address))
+            ip_address, wa_shim.get_ip_from_lease_value(encoded_address)
+        )
 
 
 class TestGoalStateParsing(CiTestCase):
 
     default_parameters = {
-        'incarnation': 1,
-        'container_id': 'MyContainerId',
-        'instance_id': 'MyInstanceId',
-        'certificates_url': 'MyCertificatesUrl',
+        "incarnation": 1,
+        "container_id": "MyContainerId",
+        "instance_id": "MyInstanceId",
+        "certificates_url": "MyCertificatesUrl",
     }
 
     def _get_formatted_goal_state_xml_string(self, **kwargs):
         parameters = self.default_parameters.copy()
         parameters.update(kwargs)
         xml = GOAL_STATE_TEMPLATE.format(**parameters)
-        if parameters['certificates_url'] is None:
+        if parameters["certificates_url"] is None:
             new_xml_lines = []
             for line in xml.splitlines():
-                if 'Certificates' in line:
+                if "Certificates" in line:
                     continue
                 new_xml_lines.append(line)
-            xml = '\n'.join(new_xml_lines)
+            xml = "\n".join(new_xml_lines)
         return xml
 
     def _get_goal_state(self, m_azure_endpoint_client=None, **kwargs):
@@ -195,17 +212,17 @@ class TestGoalStateParsing(CiTestCase):
         return azure_helper.GoalState(xml, m_azure_endpoint_client)
 
     def test_incarnation_parsed_correctly(self):
-        incarnation = '123'
+        incarnation = "123"
         goal_state = self._get_goal_state(incarnation=incarnation)
         self.assertEqual(incarnation, goal_state.incarnation)
 
     def test_container_id_parsed_correctly(self):
-        container_id = 'TestContainerId'
+        container_id = "TestContainerId"
         goal_state = self._get_goal_state(container_id=container_id)
         self.assertEqual(container_id, goal_state.container_id)
 
     def test_instance_id_parsed_correctly(self):
-        instance_id = 'TestInstanceId'
+        instance_id = "TestInstanceId"
         goal_state = self._get_goal_state(instance_id=instance_id)
         self.assertEqual(instance_id, goal_state.instance_id)
 
@@ -214,67 +231,72 @@ class TestGoalStateParsing(CiTestCase):
         previous_iid = "D0DF4C54-4ECB-4A4B-9954-5BDF3ED5C3B8"
         current_iid = "544CDFD0-CB4E-4B4A-9954-5BDF3ED5C3B8"
         self.assertTrue(
-            azure_helper.is_byte_swapped(previous_iid, current_iid))
+            azure_helper.is_byte_swapped(previous_iid, current_iid)
+        )
 
     def test_instance_id_no_byte_swap_same_instance_id(self):
         previous_iid = "D0DF4C54-4ECB-4A4B-9954-5BDF3ED5C3B8"
         current_iid = "D0DF4C54-4ECB-4A4B-9954-5BDF3ED5C3B8"
         self.assertFalse(
-            azure_helper.is_byte_swapped(previous_iid, current_iid))
+            azure_helper.is_byte_swapped(previous_iid, current_iid)
+        )
 
     def test_instance_id_no_byte_swap_diff_instance_id(self):
         previous_iid = "D0DF4C54-4ECB-4A4B-9954-5BDF3ED5C3B8"
         current_iid = "G0DF4C54-4ECB-4A4B-9954-5BDF3ED5C3B8"
         self.assertFalse(
-            azure_helper.is_byte_swapped(previous_iid, current_iid))
+            azure_helper.is_byte_swapped(previous_iid, current_iid)
+        )
 
     def test_certificates_xml_parsed_and_fetched_correctly(self):
         m_azure_endpoint_client = mock.MagicMock()
-        certificates_url = 'TestCertificatesUrl'
+        certificates_url = "TestCertificatesUrl"
         goal_state = self._get_goal_state(
             m_azure_endpoint_client=m_azure_endpoint_client,
-            certificates_url=certificates_url)
+            certificates_url=certificates_url,
+        )
         certificates_xml = goal_state.certificates_xml
         self.assertEqual(1, m_azure_endpoint_client.get.call_count)
         self.assertEqual(
-            certificates_url,
-            m_azure_endpoint_client.get.call_args[0][0])
+            certificates_url, m_azure_endpoint_client.get.call_args[0][0]
+        )
         self.assertTrue(
-            m_azure_endpoint_client.get.call_args[1].get(
-                'secure', False))
+            m_azure_endpoint_client.get.call_args[1].get("secure", False)
+        )
         self.assertEqual(
-            m_azure_endpoint_client.get.return_value.contents,
-            certificates_xml)
+            m_azure_endpoint_client.get.return_value.contents, certificates_xml
+        )
 
     def test_missing_certificates_skips_http_get(self):
         m_azure_endpoint_client = mock.MagicMock()
         goal_state = self._get_goal_state(
             m_azure_endpoint_client=m_azure_endpoint_client,
-            certificates_url=None)
+            certificates_url=None,
+        )
         certificates_xml = goal_state.certificates_xml
         self.assertEqual(0, m_azure_endpoint_client.get.call_count)
         self.assertIsNone(certificates_xml)
 
     def test_invalid_goal_state_xml_raises_parse_error(self):
-        xml = 'random non-xml data'
+        xml = "random non-xml data"
         with self.assertRaises(ElementTree.ParseError):
             azure_helper.GoalState(xml, mock.MagicMock())
 
     def test_missing_container_id_in_goal_state_xml_raises_exc(self):
         xml = self._get_formatted_goal_state_xml_string()
-        xml = re.sub('<ContainerId>.*</ContainerId>', '', xml)
+        xml = re.sub("<ContainerId>.*</ContainerId>", "", xml)
         with self.assertRaises(azure_helper.InvalidGoalStateXMLException):
             azure_helper.GoalState(xml, mock.MagicMock())
 
     def test_missing_instance_id_in_goal_state_xml_raises_exc(self):
         xml = self._get_formatted_goal_state_xml_string()
-        xml = re.sub('<InstanceId>.*</InstanceId>', '', xml)
+        xml = re.sub("<InstanceId>.*</InstanceId>", "", xml)
         with self.assertRaises(azure_helper.InvalidGoalStateXMLException):
             azure_helper.GoalState(xml, mock.MagicMock())
 
     def test_missing_incarnation_in_goal_state_xml_raises_exc(self):
         xml = self._get_formatted_goal_state_xml_string()
-        xml = re.sub('<Incarnation>.*</Incarnation>', '', xml)
+        xml = re.sub("<Incarnation>.*</Incarnation>", "", xml)
         with self.assertRaises(azure_helper.InvalidGoalStateXMLException):
             azure_helper.GoalState(xml, mock.MagicMock())
 
@@ -282,8 +304,8 @@ class TestGoalStateParsing(CiTestCase):
 class TestAzureEndpointHttpClient(CiTestCase):
 
     regular_headers = {
-        'x-ms-agent-name': 'WALinuxAgent',
-        'x-ms-version': '2012-11-30',
+        "x-ms-agent-name": "WALinuxAgent",
+        "x-ms-version": "2012-11-30",
     }
 
     def setUp(self):
@@ -291,43 +313,48 @@ class TestAzureEndpointHttpClient(CiTestCase):
         patches = ExitStack()
         self.addCleanup(patches.close)
         self.m_http_with_retries = patches.enter_context(
-            mock.patch.object(azure_helper, 'http_with_retries'))
+            mock.patch.object(azure_helper, "http_with_retries")
+        )
 
     def test_non_secure_get(self):
         client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
-        url = 'MyTestUrl'
+        url = "MyTestUrl"
         response = client.get(url, secure=False)
         self.assertEqual(1, self.m_http_with_retries.call_count)
         self.assertEqual(self.m_http_with_retries.return_value, response)
         self.assertEqual(
             mock.call(url, headers=self.regular_headers),
-            self.m_http_with_retries.call_args)
+            self.m_http_with_retries.call_args,
+        )
 
     def test_non_secure_get_raises_exception(self):
         client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
-        url = 'MyTestUrl'
+        url = "MyTestUrl"
         self.m_http_with_retries.side_effect = SentinelException
         self.assertRaises(SentinelException, client.get, url, secure=False)
         self.assertEqual(1, self.m_http_with_retries.call_count)
 
     def test_secure_get(self):
-        url = 'MyTestUrl'
+        url = "MyTestUrl"
         m_certificate = mock.MagicMock()
         expected_headers = self.regular_headers.copy()
-        expected_headers.update({
-            "x-ms-cipher-name": "DES_EDE3_CBC",
-            "x-ms-guest-agent-public-x509-cert": m_certificate,
-        })
+        expected_headers.update(
+            {
+                "x-ms-cipher-name": "DES_EDE3_CBC",
+                "x-ms-guest-agent-public-x509-cert": m_certificate,
+            }
+        )
         client = azure_helper.AzureEndpointHttpClient(m_certificate)
         response = client.get(url, secure=True)
         self.assertEqual(1, self.m_http_with_retries.call_count)
         self.assertEqual(self.m_http_with_retries.return_value, response)
         self.assertEqual(
             mock.call(url, headers=expected_headers),
-            self.m_http_with_retries.call_args)
+            self.m_http_with_retries.call_args,
+        )
 
     def test_secure_get_raises_exception(self):
-        url = 'MyTestUrl'
+        url = "MyTestUrl"
         client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
         self.m_http_with_retries.side_effect = SentinelException
         self.assertRaises(SentinelException, client.get, url, secure=True)
@@ -335,44 +362,50 @@ class TestAzureEndpointHttpClient(CiTestCase):
 
     def test_post(self):
         m_data = mock.MagicMock()
-        url = 'MyTestUrl'
+        url = "MyTestUrl"
         client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
         response = client.post(url, data=m_data)
         self.assertEqual(1, self.m_http_with_retries.call_count)
         self.assertEqual(self.m_http_with_retries.return_value, response)
         self.assertEqual(
             mock.call(url, data=m_data, headers=self.regular_headers),
-            self.m_http_with_retries.call_args)
+            self.m_http_with_retries.call_args,
+        )
 
     def test_post_raises_exception(self):
         m_data = mock.MagicMock()
-        url = 'MyTestUrl'
+        url = "MyTestUrl"
         client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
         self.m_http_with_retries.side_effect = SentinelException
         self.assertRaises(SentinelException, client.post, url, data=m_data)
         self.assertEqual(1, self.m_http_with_retries.call_count)
 
     def test_post_with_extra_headers(self):
-        url = 'MyTestUrl'
+        url = "MyTestUrl"
         client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
-        extra_headers = {'test': 'header'}
+        extra_headers = {"test": "header"}
         client.post(url, extra_headers=extra_headers)
         expected_headers = self.regular_headers.copy()
         expected_headers.update(extra_headers)
         self.assertEqual(1, self.m_http_with_retries.call_count)
         self.assertEqual(
             mock.call(url, data=mock.ANY, headers=expected_headers),
-            self.m_http_with_retries.call_args)
+            self.m_http_with_retries.call_args,
+        )
 
     def test_post_with_sleep_with_extra_headers_raises_exception(self):
         m_data = mock.MagicMock()
-        url = 'MyTestUrl'
-        extra_headers = {'test': 'header'}
+        url = "MyTestUrl"
+        extra_headers = {"test": "header"}
         client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
         self.m_http_with_retries.side_effect = SentinelException
         self.assertRaises(
-            SentinelException, client.post,
-            url, data=m_data, extra_headers=extra_headers)
+            SentinelException,
+            client.post,
+            url,
+            data=m_data,
+            extra_headers=extra_headers,
+        )
         self.assertEqual(1, self.m_http_with_retries.call_count)
 
 
@@ -392,128 +425,139 @@ class TestAzureHelperHttpWithRetries(CiTestCase):
 
         self.m_readurl = patches.enter_context(
             mock.patch.object(
-                azure_helper.url_helper, 'readurl', mock.MagicMock()))
+                azure_helper.url_helper, "readurl", mock.MagicMock()
+            )
+        )
         self.m_sleep = patches.enter_context(
-            mock.patch.object(azure_helper.time, 'sleep', autospec=True))
+            mock.patch.object(azure_helper.time, "sleep", autospec=True)
+        )
 
     def test_http_with_retries(self):
-        self.m_readurl.return_value = 'TestResp'
+        self.m_readurl.return_value = "TestResp"
         self.assertEqual(
-            azure_helper.http_with_retries('testurl'),
-            self.m_readurl.return_value)
+            azure_helper.http_with_retries("testurl"),
+            self.m_readurl.return_value,
+        )
         self.assertEqual(self.m_readurl.call_count, 1)
 
-    def test_http_with_retries_propagates_readurl_exc_and_logs_exc(
-            self):
+    def test_http_with_retries_propagates_readurl_exc_and_logs_exc(self):
         self.m_readurl.side_effect = SentinelException
 
         self.assertRaises(
-            SentinelException, azure_helper.http_with_retries, 'testurl')
+            SentinelException, azure_helper.http_with_retries, "testurl"
+        )
         self.assertEqual(self.m_readurl.call_count, self.max_readurl_attempts)
 
         self.assertIsNotNone(
             re.search(
-                r'Failed HTTP request with Azure endpoint \S* during '
-                r'attempt \d+ with exception: \S*',
-                self.logs.getvalue()))
+                r"Failed HTTP request with Azure endpoint \S* during "
+                r"attempt \d+ with exception: \S*",
+                self.logs.getvalue(),
+            )
+        )
         self.assertIsNone(
             re.search(
-                r'Successful HTTP request with Azure endpoint \S* after '
-                r'\d+ attempts',
-                self.logs.getvalue()))
+                r"Successful HTTP request with Azure endpoint \S* after "
+                r"\d+ attempts",
+                self.logs.getvalue(),
+            )
+        )
 
     def test_http_with_retries_delayed_success_due_to_temporary_readurl_exc(
-            self):
-        self.m_readurl.side_effect = \
-            [SentinelException] * self.periodic_logging_attempts + \
-            ['TestResp']
-        self.m_readurl.return_value = 'TestResp'
-
-        response = azure_helper.http_with_retries('testurl')
-        self.assertEqual(
-            response,
-            self.m_readurl.return_value)
+        self,
+    ):
+        self.m_readurl.side_effect = [
+            SentinelException
+        ] * self.periodic_logging_attempts + ["TestResp"]
+        self.m_readurl.return_value = "TestResp"
+
+        response = azure_helper.http_with_retries("testurl")
+        self.assertEqual(response, self.m_readurl.return_value)
         self.assertEqual(
-            self.m_readurl.call_count,
-            self.periodic_logging_attempts + 1)
+            self.m_readurl.call_count, self.periodic_logging_attempts + 1
+        )
 
         # Ensure that cloud-init did sleep between each failed request
         self.assertEqual(
-            self.m_sleep.call_count,
-            self.periodic_logging_attempts)
+            self.m_sleep.call_count, self.periodic_logging_attempts
+        )
         self.m_sleep.assert_called_with(self.sleep_duration_between_retries)
 
     def test_http_with_retries_long_delay_logs_periodic_failure_msg(self):
-        self.m_readurl.side_effect = \
-            [SentinelException] * self.periodic_logging_attempts + \
-            ['TestResp']
-        self.m_readurl.return_value = 'TestResp'
+        self.m_readurl.side_effect = [
+            SentinelException
+        ] * self.periodic_logging_attempts + ["TestResp"]
+        self.m_readurl.return_value = "TestResp"
 
-        azure_helper.http_with_retries('testurl')
+        azure_helper.http_with_retries("testurl")
 
         self.assertEqual(
-            self.m_readurl.call_count,
-            self.periodic_logging_attempts + 1)
+            self.m_readurl.call_count, self.periodic_logging_attempts + 1
+        )
         self.assertIsNotNone(
             re.search(
-                r'Failed HTTP request with Azure endpoint \S* during '
-                r'attempt \d+ with exception: \S*',
-                self.logs.getvalue()))
+                r"Failed HTTP request with Azure endpoint \S* during "
+                r"attempt \d+ with exception: \S*",
+                self.logs.getvalue(),
+            )
+        )
         self.assertIsNotNone(
             re.search(
-                r'Successful HTTP request with Azure endpoint \S* after '
-                r'\d+ attempts',
-                self.logs.getvalue()))
+                r"Successful HTTP request with Azure endpoint \S* after "
+                r"\d+ attempts",
+                self.logs.getvalue(),
+            )
+        )
 
     def test_http_with_retries_short_delay_does_not_log_periodic_failure_msg(
-            self):
-        self.m_readurl.side_effect = \
-            [SentinelException] * \
-            (self.periodic_logging_attempts - 1) + \
-            ['TestResp']
-        self.m_readurl.return_value = 'TestResp'
-
-        azure_helper.http_with_retries('testurl')
+        self,
+    ):
+        self.m_readurl.side_effect = [SentinelException] * (
+            self.periodic_logging_attempts - 1
+        ) + ["TestResp"]
+        self.m_readurl.return_value = "TestResp"
+
+        azure_helper.http_with_retries("testurl")
         self.assertEqual(
-            self.m_readurl.call_count,
-            self.periodic_logging_attempts)
+            self.m_readurl.call_count, self.periodic_logging_attempts
+        )
 
         self.assertIsNone(
             re.search(
-                r'Failed HTTP request with Azure endpoint \S* during '
-                r'attempt \d+ with exception: \S*',
-                self.logs.getvalue()))
+                r"Failed HTTP request with Azure endpoint \S* during "
+                r"attempt \d+ with exception: \S*",
+                self.logs.getvalue(),
+            )
+        )
         self.assertIsNotNone(
             re.search(
-                r'Successful HTTP request with Azure endpoint \S* after '
-                r'\d+ attempts',
-                self.logs.getvalue()))
+                r"Successful HTTP request with Azure endpoint \S* after "
+                r"\d+ attempts",
+                self.logs.getvalue(),
+            )
+        )
 
     def test_http_with_retries_calls_url_helper_readurl_with_args_kwargs(self):
         testurl = mock.MagicMock()
         kwargs = {
-            'headers': mock.MagicMock(),
-            'data': mock.MagicMock(),
+            "headers": mock.MagicMock(),
+            "data": mock.MagicMock(),
             # timeout kwarg should not be modified or deleted if present
-            'timeout': mock.MagicMock()
+            "timeout": mock.MagicMock(),
         }
         azure_helper.http_with_retries(testurl, **kwargs)
         self.m_readurl.assert_called_once_with(testurl, **kwargs)
 
     def test_http_with_retries_adds_timeout_kwarg_if_not_present(self):
         testurl = mock.MagicMock()
-        kwargs = {
-            'headers': mock.MagicMock(),
-            'data': mock.MagicMock()
-        }
+        kwargs = {"headers": mock.MagicMock(), "data": mock.MagicMock()}
         expected_kwargs = copy.deepcopy(kwargs)
-        expected_kwargs['timeout'] = self.default_readurl_timeout
+        expected_kwargs["timeout"] = self.default_readurl_timeout
 
         azure_helper.http_with_retries(testurl, **kwargs)
         self.m_readurl.assert_called_once_with(testurl, **expected_kwargs)
 
-    def test_http_with_retries_deletes_retries_kwargs_passed_in(
-            self):
+    def test_http_with_retries_deletes_retries_kwargs_passed_in(self):
         """http_with_retries already implements retry logic,
         so url_helper.readurl should not have retries.
         http_with_retries should delete kwargs that
@@ -521,44 +565,44 @@ class TestAzureHelperHttpWithRetries(CiTestCase):
         """
         testurl = mock.MagicMock()
         kwargs = {
-            'headers': mock.MagicMock(),
-            'data': mock.MagicMock(),
-            'timeout': mock.MagicMock(),
-            'retries': mock.MagicMock(),
-            'infinite': mock.MagicMock()
+            "headers": mock.MagicMock(),
+            "data": mock.MagicMock(),
+            "timeout": mock.MagicMock(),
+            "retries": mock.MagicMock(),
+            "infinite": mock.MagicMock(),
         }
         expected_kwargs = copy.deepcopy(kwargs)
-        expected_kwargs.pop('retries', None)
-        expected_kwargs.pop('infinite', None)
+        expected_kwargs.pop("retries", None)
+        expected_kwargs.pop("infinite", None)
 
         azure_helper.http_with_retries(testurl, **kwargs)
         self.m_readurl.assert_called_once_with(testurl, **expected_kwargs)
         self.assertIn(
-            'retries kwarg passed in for communication with Azure endpoint.',
-            self.logs.getvalue())
+            "retries kwarg passed in for communication with Azure endpoint.",
+            self.logs.getvalue(),
+        )
         self.assertIn(
-            'infinite kwarg passed in for communication with Azure endpoint.',
-            self.logs.getvalue())
+            "infinite kwarg passed in for communication with Azure endpoint.",
+            self.logs.getvalue(),
+        )
 
 
 class TestOpenSSLManager(CiTestCase):
-
     def setUp(self):
         super(TestOpenSSLManager, self).setUp()
         patches = ExitStack()
         self.addCleanup(patches.close)
 
         self.subp = patches.enter_context(
-            mock.patch.object(azure_helper.subp, 'subp'))
+            mock.patch.object(azure_helper.subp, "subp")
+        )
         try:
-            self.open = patches.enter_context(
-                mock.patch('__builtin__.open'))
+            self.open = patches.enter_context(mock.patch("__builtin__.open"))
         except ImportError:
-            self.open = patches.enter_context(
-                mock.patch('builtins.open'))
+            self.open = patches.enter_context(mock.patch("builtins.open"))
 
-    @mock.patch.object(azure_helper, 'cd', mock.MagicMock())
-    @mock.patch.object(azure_helper.temp_utils, 'mkdtemp')
+    @mock.patch.object(azure_helper, "cd", mock.MagicMock())
+    @mock.patch.object(azure_helper.temp_utils, "mkdtemp")
     def test_openssl_manager_creates_a_tmpdir(self, mkdtemp):
         manager = azure_helper.OpenSSLManager()
         self.assertEqual(mkdtemp.return_value, manager.tmpdir)
@@ -567,16 +611,16 @@ class TestOpenSSLManager(CiTestCase):
         subp_directory = {}
 
         def capture_directory(*args, **kwargs):
-            subp_directory['path'] = os.getcwd()
+            subp_directory["path"] = os.getcwd()
 
         self.subp.side_effect = capture_directory
         manager = azure_helper.OpenSSLManager()
-        self.assertEqual(manager.tmpdir, subp_directory['path'])
+        self.assertEqual(manager.tmpdir, subp_directory["path"])
         manager.clean_up()
 
-    @mock.patch.object(azure_helper, 'cd', mock.MagicMock())
-    @mock.patch.object(azure_helper.temp_utils, 'mkdtemp', mock.MagicMock())
-    @mock.patch.object(azure_helper.util, 'del_dir')
+    @mock.patch.object(azure_helper, "cd", mock.MagicMock())
+    @mock.patch.object(azure_helper.temp_utils, "mkdtemp", mock.MagicMock())
+    @mock.patch.object(azure_helper.util, "del_dir")
     def test_clean_up(self, del_dir):
         manager = azure_helper.OpenSSLManager()
         manager.clean_up()
@@ -584,43 +628,42 @@ class TestOpenSSLManager(CiTestCase):
 
 
 class TestOpenSSLManagerActions(CiTestCase):
-
     def setUp(self):
         super(TestOpenSSLManagerActions, self).setUp()
 
         self.allowed_subp = True
 
     def _data_file(self, name):
-        path = 'tests/data/azure'
+        path = "tests/data/azure"
         return os.path.join(path, name)
 
     @unittest.skip("todo move to cloud_test")
     def test_pubkey_extract(self):
-        cert = load_file(self._data_file('pubkey_extract_cert'))
-        good_key = load_file(self._data_file('pubkey_extract_ssh_key'))
+        cert = load_file(self._data_file("pubkey_extract_cert"))
+        good_key = load_file(self._data_file("pubkey_extract_ssh_key"))
         sslmgr = azure_helper.OpenSSLManager()
         key = sslmgr._get_ssh_key_from_cert(cert)
         self.assertEqual(good_key, key)
 
-        good_fingerprint = '073E19D14D1C799224C6A0FD8DDAB6A8BF27D473'
+        good_fingerprint = "073E19D14D1C799224C6A0FD8DDAB6A8BF27D473"
         fingerprint = sslmgr._get_fingerprint_from_cert(cert)
         self.assertEqual(good_fingerprint, fingerprint)
 
     @unittest.skip("todo move to cloud_test")
-    @mock.patch.object(azure_helper.OpenSSLManager, '_decrypt_certs_from_xml')
+    @mock.patch.object(azure_helper.OpenSSLManager, "_decrypt_certs_from_xml")
     def test_parse_certificates(self, mock_decrypt_certs):
         """Azure control plane puts private keys as well as certificates
-           into the Certificates XML object. Make sure only the public keys
-           from certs are extracted and that fingerprints are converted to
-           the form specified in the ovf-env.xml file.
+        into the Certificates XML object. Make sure only the public keys
+        from certs are extracted and that fingerprints are converted to
+        the form specified in the ovf-env.xml file.
         """
-        cert_contents = load_file(self._data_file('parse_certificates_pem'))
-        fingerprints = load_file(self._data_file(
-            'parse_certificates_fingerprints')
+        cert_contents = load_file(self._data_file("parse_certificates_pem"))
+        fingerprints = load_file(
+            self._data_file("parse_certificates_fingerprints")
         ).splitlines()
         mock_decrypt_certs.return_value = cert_contents
         sslmgr = azure_helper.OpenSSLManager()
-        keys_by_fp = sslmgr.parse_certificates('')
+        keys_by_fp = sslmgr.parse_certificates("")
         for fp in keys_by_fp.keys():
             self.assertIn(fp, fingerprints)
         for fp in fingerprints:
@@ -632,21 +675,23 @@ class TestGoalStateHealthReporter(CiTestCase):
     maxDiff = None
 
     default_parameters = {
-        'incarnation': 1634,
-        'container_id': 'MyContainerId',
-        'instance_id': 'MyInstanceId'
+        "incarnation": 1634,
+        "container_id": "MyContainerId",
+        "instance_id": "MyInstanceId",
     }
 
-    test_azure_endpoint = 'TestEndpoint'
-    test_health_report_url = 'http://{0}/machine?comp=health'.format(
-        test_azure_endpoint)
-    test_default_headers = {'Content-Type': 'text/xml; charset=utf-8'}
+    test_azure_endpoint = "TestEndpoint"
+    test_health_report_url = "http://{0}/machine?comp=health".format(
+        test_azure_endpoint
+    )
+    test_default_headers = {"Content-Type": "text/xml; charset=utf-8"}
 
-    provisioning_success_status = 'Ready'
-    provisioning_not_ready_status = 'NotReady'
-    provisioning_failure_substatus = 'ProvisioningFailed'
+    provisioning_success_status = "Ready"
+    provisioning_not_ready_status = "NotReady"
+    provisioning_failure_substatus = "ProvisioningFailed"
     provisioning_failure_err_description = (
-        'Test error message containing provisioning failure details')
+        "Test error message containing provisioning failure details"
+    )
 
     def setUp(self):
         super(TestGoalStateHealthReporter, self).setUp()
@@ -654,22 +699,28 @@ class TestGoalStateHealthReporter(CiTestCase):
         self.addCleanup(patches.close)
 
         patches.enter_context(
-            mock.patch.object(azure_helper.time, 'sleep', mock.MagicMock()))
+            mock.patch.object(azure_helper.time, "sleep", mock.MagicMock())
+        )
         self.read_file_or_url = patches.enter_context(
-            mock.patch.object(azure_helper.url_helper, 'read_file_or_url'))
+            mock.patch.object(azure_helper.url_helper, "read_file_or_url")
+        )
 
         self.post = patches.enter_context(
-            mock.patch.object(azure_helper.AzureEndpointHttpClient,
-                              'post'))
+            mock.patch.object(azure_helper.AzureEndpointHttpClient, "post")
+        )
 
         self.GoalState = patches.enter_context(
-            mock.patch.object(azure_helper, 'GoalState'))
-        self.GoalState.return_value.container_id = \
-            self.default_parameters['container_id']
-        self.GoalState.return_value.instance_id = \
-            self.default_parameters['instance_id']
-        self.GoalState.return_value.incarnation = \
-            self.default_parameters['incarnation']
+            mock.patch.object(azure_helper, "GoalState")
+        )
+        self.GoalState.return_value.container_id = self.default_parameters[
+            "container_id"
+        ]
+        self.GoalState.return_value.instance_id = self.default_parameters[
+            "instance_id"
+        ]
+        self.GoalState.return_value.incarnation = self.default_parameters[
+            "incarnation"
+        ]
 
     def _text_from_xpath_in_xroot(self, xroot, xpath):
         element = xroot.find(xpath)
@@ -685,34 +736,41 @@ class TestGoalStateHealthReporter(CiTestCase):
 
     def _get_report_ready_health_document(self):
         return self._get_formatted_health_report_xml_string(
-            incarnation=escape(str(self.default_parameters['incarnation'])),
-            container_id=escape(self.default_parameters['container_id']),
-            instance_id=escape(self.default_parameters['instance_id']),
+            incarnation=escape(str(self.default_parameters["incarnation"])),
+            container_id=escape(self.default_parameters["container_id"]),
+            instance_id=escape(self.default_parameters["instance_id"]),
             health_status=escape(self.provisioning_success_status),
-            health_detail_subsection='')
+            health_detail_subsection="",
+        )
 
     def _get_report_failure_health_document(self):
-        health_detail_subsection = \
+        health_detail_subsection = (
             self._get_formatted_health_detail_subsection_xml_string(
                 health_substatus=escape(self.provisioning_failure_substatus),
                 health_description=escape(
-                    self.provisioning_failure_err_description))
+                    self.provisioning_failure_err_description
+                ),
+            )
+        )
 
         return self._get_formatted_health_report_xml_string(
-            incarnation=escape(str(self.default_parameters['incarnation'])),
-            container_id=escape(self.default_parameters['container_id']),
-            instance_id=escape(self.default_parameters['instance_id']),
+            incarnation=escape(str(self.default_parameters["incarnation"])),
+            container_id=escape(self.default_parameters["container_id"]),
+            instance_id=escape(self.default_parameters["instance_id"]),
             health_status=escape(self.provisioning_not_ready_status),
-            health_detail_subsection=health_detail_subsection)
+            health_detail_subsection=health_detail_subsection,
+        )
 
     def test_send_ready_signal_sends_post_request(self):
         with mock.patch.object(
-                azure_helper.GoalStateHealthReporter,
-                'build_report') as m_build_report:
+            azure_helper.GoalStateHealthReporter, "build_report"
+        ) as m_build_report:
             client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
             reporter = azure_helper.GoalStateHealthReporter(
                 azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
-                client, self.test_azure_endpoint)
+                client,
+                self.test_azure_endpoint,
+            )
             reporter.send_ready_signal()
 
             self.assertEqual(1, self.post.call_count)
@@ -720,73 +778,94 @@ class TestGoalStateHealthReporter(CiTestCase):
                 mock.call(
                     self.test_health_report_url,
                     data=m_build_report.return_value,
-                    extra_headers=self.test_default_headers),
-                self.post.call_args)
+                    extra_headers=self.test_default_headers,
+                ),
+                self.post.call_args,
+            )
 
     def test_send_failure_signal_sends_post_request(self):
         with mock.patch.object(
-                azure_helper.GoalStateHealthReporter,
-                'build_report') as m_build_report:
+            azure_helper.GoalStateHealthReporter, "build_report"
+        ) as m_build_report:
             client = azure_helper.AzureEndpointHttpClient(mock.MagicMock())
             reporter = azure_helper.GoalStateHealthReporter(
                 azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
-                client, self.test_azure_endpoint)
+                client,
+                self.test_azure_endpoint,
+            )
             reporter.send_failure_signal(
-                description=self.provisioning_failure_err_description)
+                description=self.provisioning_failure_err_description
+            )
 
             self.assertEqual(1, self.post.call_count)
             self.assertEqual(
                 mock.call(
                     self.test_health_report_url,
                     data=m_build_report.return_value,
-                    extra_headers=self.test_default_headers),
-                self.post.call_args)
+                    extra_headers=self.test_default_headers,
+                ),
+                self.post.call_args,
+            )
 
     def test_build_report_for_ready_signal_health_document(self):
         health_document = self._get_report_ready_health_document()
         reporter = azure_helper.GoalStateHealthReporter(
             azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
             azure_helper.AzureEndpointHttpClient(mock.MagicMock()),
-            self.test_azure_endpoint)
+            self.test_azure_endpoint,
+        )
         generated_health_document = reporter.build_report(
-            incarnation=self.default_parameters['incarnation'],
-            container_id=self.default_parameters['container_id'],
-            instance_id=self.default_parameters['instance_id'],
-            status=self.provisioning_success_status)
+            incarnation=self.default_parameters["incarnation"],
+            container_id=self.default_parameters["container_id"],
+            instance_id=self.default_parameters["instance_id"],
+            status=self.provisioning_success_status,
+        )
 
         self.assertEqual(health_document, generated_health_document)
 
         generated_xroot = ElementTree.fromstring(generated_health_document)
         self.assertEqual(
             self._text_from_xpath_in_xroot(
-                generated_xroot, './GoalStateIncarnation'),
-            str(self.default_parameters['incarnation']))
+                generated_xroot, "./GoalStateIncarnation"
+            ),
+            str(self.default_parameters["incarnation"]),
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
-                generated_xroot, './Container/ContainerId'),
-            str(self.default_parameters['container_id']))
+                generated_xroot, "./Container/ContainerId"
+            ),
+            str(self.default_parameters["container_id"]),
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
-                generated_xroot,
-                './Container/RoleInstanceList/Role/InstanceId'),
-            str(self.default_parameters['instance_id']))
+                generated_xroot, "./Container/RoleInstanceList/Role/InstanceId"
+            ),
+            str(self.default_parameters["instance_id"]),
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
                 generated_xroot,
-                './Container/RoleInstanceList/Role/Health/State'),
-            escape(self.provisioning_success_status))
+                "./Container/RoleInstanceList/Role/Health/State",
+            ),
+            escape(self.provisioning_success_status),
+        )
         self.assertIsNone(
             self._text_from_xpath_in_xroot(
                 generated_xroot,
-                './Container/RoleInstanceList/Role/Health/Details'))
+                "./Container/RoleInstanceList/Role/Health/Details",
+            )
+        )
         self.assertIsNone(
             self._text_from_xpath_in_xroot(
                 generated_xroot,
-                './Container/RoleInstanceList/Role/Health/Details/SubStatus'))
+                "./Container/RoleInstanceList/Role/Health/Details/SubStatus",
+            )
+        )
         self.assertIsNone(
             self._text_from_xpath_in_xroot(
                 generated_xroot,
-                './Container/RoleInstanceList/Role/Health/Details/Description')
+                "./Container/RoleInstanceList/Role/Health/Details/Description",
+            )
         )
 
     def test_build_report_for_failure_signal_health_document(self):
@@ -794,120 +873,143 @@ class TestGoalStateHealthReporter(CiTestCase):
         reporter = azure_helper.GoalStateHealthReporter(
             azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
             azure_helper.AzureEndpointHttpClient(mock.MagicMock()),
-            self.test_azure_endpoint)
+            self.test_azure_endpoint,
+        )
         generated_health_document = reporter.build_report(
-            incarnation=self.default_parameters['incarnation'],
-            container_id=self.default_parameters['container_id'],
-            instance_id=self.default_parameters['instance_id'],
+            incarnation=self.default_parameters["incarnation"],
+            container_id=self.default_parameters["container_id"],
+            instance_id=self.default_parameters["instance_id"],
             status=self.provisioning_not_ready_status,
             substatus=self.provisioning_failure_substatus,
-            description=self.provisioning_failure_err_description)
+            description=self.provisioning_failure_err_description,
+        )
 
         self.assertEqual(health_document, generated_health_document)
 
         generated_xroot = ElementTree.fromstring(generated_health_document)
         self.assertEqual(
             self._text_from_xpath_in_xroot(
-                generated_xroot, './GoalStateIncarnation'),
-            str(self.default_parameters['incarnation']))
+                generated_xroot, "./GoalStateIncarnation"
+            ),
+            str(self.default_parameters["incarnation"]),
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
-                generated_xroot, './Container/ContainerId'),
-            self.default_parameters['container_id'])
+                generated_xroot, "./Container/ContainerId"
+            ),
+            self.default_parameters["container_id"],
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
-                generated_xroot,
-                './Container/RoleInstanceList/Role/InstanceId'),
-            self.default_parameters['instance_id'])
+                generated_xroot, "./Container/RoleInstanceList/Role/InstanceId"
+            ),
+            self.default_parameters["instance_id"],
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
                 generated_xroot,
-                './Container/RoleInstanceList/Role/Health/State'),
-            escape(self.provisioning_not_ready_status))
+                "./Container/RoleInstanceList/Role/Health/State",
+            ),
+            escape(self.provisioning_not_ready_status),
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
                 generated_xroot,
-                './Container/RoleInstanceList/Role/Health/Details/'
-                'SubStatus'),
-            escape(self.provisioning_failure_substatus))
+                "./Container/RoleInstanceList/Role/Health/Details/SubStatus",
+            ),
+            escape(self.provisioning_failure_substatus),
+        )
         self.assertEqual(
             self._text_from_xpath_in_xroot(
                 generated_xroot,
-                './Container/RoleInstanceList/Role/Health/Details/'
-                'Description'),
-            escape(self.provisioning_failure_err_description))
+                "./Container/RoleInstanceList/Role/Health/Details/Description",
+            ),
+            escape(self.provisioning_failure_err_description),
+        )
 
     def test_send_ready_signal_calls_build_report(self):
         with mock.patch.object(
-            azure_helper.GoalStateHealthReporter, 'build_report'
+            azure_helper.GoalStateHealthReporter, "build_report"
         ) as m_build_report:
             reporter = azure_helper.GoalStateHealthReporter(
                 azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
                 azure_helper.AzureEndpointHttpClient(mock.MagicMock()),
-                self.test_azure_endpoint)
+                self.test_azure_endpoint,
+            )
             reporter.send_ready_signal()
 
             self.assertEqual(1, m_build_report.call_count)
             self.assertEqual(
                 mock.call(
-                    incarnation=self.default_parameters['incarnation'],
-                    container_id=self.default_parameters['container_id'],
-                    instance_id=self.default_parameters['instance_id'],
-                    status=self.provisioning_success_status),
-                m_build_report.call_args)
+                    incarnation=self.default_parameters["incarnation"],
+                    container_id=self.default_parameters["container_id"],
+                    instance_id=self.default_parameters["instance_id"],
+                    status=self.provisioning_success_status,
+                ),
+                m_build_report.call_args,
+            )
 
     def test_send_failure_signal_calls_build_report(self):
         with mock.patch.object(
-            azure_helper.GoalStateHealthReporter, 'build_report'
+            azure_helper.GoalStateHealthReporter, "build_report"
         ) as m_build_report:
             reporter = azure_helper.GoalStateHealthReporter(
                 azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
                 azure_helper.AzureEndpointHttpClient(mock.MagicMock()),
-                self.test_azure_endpoint)
+                self.test_azure_endpoint,
+            )
             reporter.send_failure_signal(
-                description=self.provisioning_failure_err_description)
+                description=self.provisioning_failure_err_description
+            )
 
             self.assertEqual(1, m_build_report.call_count)
             self.assertEqual(
                 mock.call(
-                    incarnation=self.default_parameters['incarnation'],
-                    container_id=self.default_parameters['container_id'],
-                    instance_id=self.default_parameters['instance_id'],
+                    incarnation=self.default_parameters["incarnation"],
+                    container_id=self.default_parameters["container_id"],
+                    instance_id=self.default_parameters["instance_id"],
                     status=self.provisioning_not_ready_status,
                     substatus=self.provisioning_failure_substatus,
-                    description=self.provisioning_failure_err_description),
-                m_build_report.call_args)
+                    description=self.provisioning_failure_err_description,
+                ),
+                m_build_report.call_args,
+            )
 
     def test_build_report_escapes_chars(self):
-        incarnation = 'jd8\'9*&^<\'A><A[p&o+\"SD()*&&&LKAJSD23'
-        container_id = '&&<\"><><ds8\'9+7&d9a86!@($09asdl;<>'
-        instance_id = 'Opo>>>jas\'&d;[p&fp\"a<<!!@&&'
-        health_status = '&<897\"6&>&aa\'sd!@&!)((*<&>'
-        health_substatus = '&as\"d<<a&s>d<\'^@!5&6<7'
-        health_description = '&&&>!#$\"&&<as\'1!@$d&>><>&\"sd<67<]>>'
-
-        health_detail_subsection = \
+        incarnation = "jd8'9*&^<'A><A[p&o+\"SD()*&&&LKAJSD23"
+        container_id = "&&<\"><><ds8'9+7&d9a86!@($09asdl;<>"
+        instance_id = "Opo>>>jas'&d;[p&fp\"a<<!!@&&"
+        health_status = "&<897\"6&>&aa'sd!@&!)((*<&>"
+        health_substatus = "&as\"d<<a&s>d<'^@!5&6<7"
+        health_description = '&&&>!#$"&&<as\'1!@$d&>><>&"sd<67<]>>'
+
+        health_detail_subsection = (
             self._get_formatted_health_detail_subsection_xml_string(
                 health_substatus=escape(health_substatus),
-                health_description=escape(health_description))
+                health_description=escape(health_description),
+            )
+        )
         health_document = self._get_formatted_health_report_xml_string(
             incarnation=escape(incarnation),
             container_id=escape(container_id),
             instance_id=escape(instance_id),
             health_status=escape(health_status),
-            health_detail_subsection=health_detail_subsection)
+            health_detail_subsection=health_detail_subsection,
+        )
 
         reporter = azure_helper.GoalStateHealthReporter(
             azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
             azure_helper.AzureEndpointHttpClient(mock.MagicMock()),
-            self.test_azure_endpoint)
+            self.test_azure_endpoint,
+        )
         generated_health_document = reporter.build_report(
             incarnation=incarnation,
             container_id=container_id,
             instance_id=instance_id,
             status=health_status,
             substatus=health_substatus,
-            description=health_description)
+            description=health_description,
+        )
 
         self.assertEqual(health_document, generated_health_document)
 
@@ -915,26 +1017,31 @@ class TestGoalStateHealthReporter(CiTestCase):
         reporter = azure_helper.GoalStateHealthReporter(
             azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
             azure_helper.AzureEndpointHttpClient(mock.MagicMock()),
-            self.test_azure_endpoint)
-        long_err_msg = 'a9&ea8>>>e as1< d\"q2*&(^%\'a=5<' * 100
+            self.test_azure_endpoint,
+        )
+        long_err_msg = "a9&ea8>>>e as1< d\"q2*&(^%'a=5<" * 100
         generated_health_document = reporter.build_report(
-            incarnation=self.default_parameters['incarnation'],
-            container_id=self.default_parameters['container_id'],
-            instance_id=self.default_parameters['instance_id'],
+            incarnation=self.default_parameters["incarnation"],
+            container_id=self.default_parameters["container_id"],
+            instance_id=self.default_parameters["instance_id"],
             status=self.provisioning_not_ready_status,
             substatus=self.provisioning_failure_substatus,
-            description=long_err_msg)
+            description=long_err_msg,
+        )
 
         generated_xroot = ElementTree.fromstring(generated_health_document)
         generated_health_report_description = self._text_from_xpath_in_xroot(
             generated_xroot,
-            './Container/RoleInstanceList/Role/Health/Details/Description')
+            "./Container/RoleInstanceList/Role/Health/Details/Description",
+        )
         self.assertEqual(
             len(unescape(generated_health_report_description)),
-            HEALTH_REPORT_DESCRIPTION_TRIM_LEN)
+            HEALTH_REPORT_DESCRIPTION_TRIM_LEN,
+        )
 
     def test_trim_description_then_escape_conforms_to_len_limits_worst_case(
-            self):
+        self,
+    ):
         """When unescaped characters are XML-escaped, the length increases.
         Char      Escape String
         <         &lt;
@@ -963,46 +1070,53 @@ class TestGoalStateHealthReporter(CiTestCase):
         reporter = azure_helper.GoalStateHealthReporter(
             azure_helper.GoalState(mock.MagicMock(), mock.MagicMock()),
             azure_helper.AzureEndpointHttpClient(mock.MagicMock()),
-            self.test_azure_endpoint)
-        long_err_msg = '\'\"' * 10000
+            self.test_azure_endpoint,
+        )
+        long_err_msg = "'\"" * 10000
         generated_health_document = reporter.build_report(
-            incarnation=self.default_parameters['incarnation'],
-            container_id=self.default_parameters['container_id'],
-            instance_id=self.default_parameters['instance_id'],
+            incarnation=self.default_parameters["incarnation"],
+            container_id=self.default_parameters["container_id"],
+            instance_id=self.default_parameters["instance_id"],
             status=self.provisioning_not_ready_status,
             substatus=self.provisioning_failure_substatus,
-            description=long_err_msg)
+            description=long_err_msg,
+        )
 
         generated_xroot = ElementTree.fromstring(generated_health_document)
         generated_health_report_description = self._text_from_xpath_in_xroot(
             generated_xroot,
-            './Container/RoleInstanceList/Role/Health/Details/Description')
+            "./Container/RoleInstanceList/Role/Health/Details/Description",
+        )
         # The escaped description string should be less than
         # the Azure platform limit for the escaped description string.
         self.assertLessEqual(len(generated_health_report_description), 4096)
 
 
 class TestWALinuxAgentShim(CiTestCase):
-
     def setUp(self):
         super(TestWALinuxAgentShim, self).setUp()
         patches = ExitStack()
         self.addCleanup(patches.close)
 
         self.AzureEndpointHttpClient = patches.enter_context(
-            mock.patch.object(azure_helper, 'AzureEndpointHttpClient'))
+            mock.patch.object(azure_helper, "AzureEndpointHttpClient")
+        )
         self.find_endpoint = patches.enter_context(
-            mock.patch.object(wa_shim, 'find_endpoint'))
+            mock.patch.object(wa_shim, "find_endpoint")
+        )
         self.GoalState = patches.enter_context(
-            mock.patch.object(azure_helper, 'GoalState'))
+            mock.patch.object(azure_helper, "GoalState")
+        )
         self.OpenSSLManager = patches.enter_context(
-            mock.patch.object(azure_helper, 'OpenSSLManager', autospec=True))
+            mock.patch.object(azure_helper, "OpenSSLManager", autospec=True)
+        )
         patches.enter_context(
-            mock.patch.object(azure_helper.time, 'sleep', mock.MagicMock()))
+            mock.patch.object(azure_helper.time, "sleep", mock.MagicMock())
+        )
 
-        self.test_incarnation = 'TestIncarnation'
-        self.test_container_id = 'TestContainerId'
-        self.test_instance_id = 'TestInstanceId'
+        self.test_incarnation = "TestIncarnation"
+        self.test_container_id = "TestContainerId"
+        self.test_instance_id = "TestInstanceId"
         self.GoalState.return_value.incarnation = self.test_incarnation
         self.GoalState.return_value.container_id = self.test_container_id
         self.GoalState.return_value.instance_id = self.test_instance_id
@@ -1010,7 +1124,7 @@ class TestWALinuxAgentShim(CiTestCase):
     def test_eject_iso_is_called(self):
         shim = wa_shim()
         with mock.patch.object(
-            shim, 'eject_iso', autospec=True
+            shim, "eject_iso", autospec=True
         ) as m_eject_iso:
             shim.register_with_azure_and_fetch_data(iso_dev="/dev/sr0")
             m_eject_iso.assert_called_once_with("/dev/sr0")
@@ -1019,102 +1133,113 @@ class TestWALinuxAgentShim(CiTestCase):
         shim = wa_shim()
         shim.register_with_azure_and_fetch_data()
         self.assertEqual(
-            [mock.call(None)],
-            self.AzureEndpointHttpClient.call_args_list)
+            [mock.call(None)], self.AzureEndpointHttpClient.call_args_list
+        )
 
     def test_http_client_does_not_use_certificate_for_report_failure(self):
         shim = wa_shim()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
+        shim.register_with_azure_and_report_failure(description="TestDesc")
         self.assertEqual(
-            [mock.call(None)],
-            self.AzureEndpointHttpClient.call_args_list)
+            [mock.call(None)], self.AzureEndpointHttpClient.call_args_list
+        )
 
     def test_correct_url_used_for_goalstate_during_report_ready(self):
-        self.find_endpoint.return_value = 'test_endpoint'
+        self.find_endpoint.return_value = "test_endpoint"
         shim = wa_shim()
         shim.register_with_azure_and_fetch_data()
         m_get = self.AzureEndpointHttpClient.return_value.get
         self.assertEqual(
-            [mock.call('http://test_endpoint/machine/?comp=goalstate')],
-            m_get.call_args_list)
+            [mock.call("http://test_endpoint/machine/?comp=goalstate")],
+            m_get.call_args_list,
+        )
         self.assertEqual(
-            [mock.call(
-                m_get.return_value.contents,
-                self.AzureEndpointHttpClient.return_value,
-                False
-            )],
-            self.GoalState.call_args_list)
+            [
+                mock.call(
+                    m_get.return_value.contents,
+                    self.AzureEndpointHttpClient.return_value,
+                    False,
+                )
+            ],
+            self.GoalState.call_args_list,
+        )
 
     def test_correct_url_used_for_goalstate_during_report_failure(self):
-        self.find_endpoint.return_value = 'test_endpoint'
+        self.find_endpoint.return_value = "test_endpoint"
         shim = wa_shim()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
+        shim.register_with_azure_and_report_failure(description="TestDesc")
         m_get = self.AzureEndpointHttpClient.return_value.get
         self.assertEqual(
-            [mock.call('http://test_endpoint/machine/?comp=goalstate')],
-            m_get.call_args_list)
+            [mock.call("http://test_endpoint/machine/?comp=goalstate")],
+            m_get.call_args_list,
+        )
         self.assertEqual(
-            [mock.call(
-                m_get.return_value.contents,
-                self.AzureEndpointHttpClient.return_value,
-                False
-            )],
-            self.GoalState.call_args_list)
+            [
+                mock.call(
+                    m_get.return_value.contents,
+                    self.AzureEndpointHttpClient.return_value,
+                    False,
+                )
+            ],
+            self.GoalState.call_args_list,
+        )
 
     def test_certificates_used_to_determine_public_keys(self):
         # if register_with_azure_and_fetch_data() isn't passed some info about
         # the user's public keys, there's no point in even trying to parse the
         # certificates
         shim = wa_shim()
-        mypk = [{'fingerprint': 'fp1', 'path': 'path1'},
-                {'fingerprint': 'fp3', 'path': 'path3', 'value': ''}]
-        certs = {'fp1': 'expected-key',
-                 'fp2': 'should-not-be-found',
-                 'fp3': 'expected-no-value-key',
-                 }
+        mypk = [
+            {"fingerprint": "fp1", "path": "path1"},
+            {"fingerprint": "fp3", "path": "path3", "value": ""},
+        ]
+        certs = {
+            "fp1": "expected-key",
+            "fp2": "should-not-be-found",
+            "fp3": "expected-no-value-key",
+        }
         sslmgr = self.OpenSSLManager.return_value
         sslmgr.parse_certificates.return_value = certs
         data = shim.register_with_azure_and_fetch_data(pubkey_info=mypk)
         self.assertEqual(
             [mock.call(self.GoalState.return_value.certificates_xml)],
-            sslmgr.parse_certificates.call_args_list)
-        self.assertIn('expected-key', data['public-keys'])
-        self.assertIn('expected-no-value-key', data['public-keys'])
-        self.assertNotIn('should-not-be-found', data['public-keys'])
+            sslmgr.parse_certificates.call_args_list,
+        )
+        self.assertIn("expected-key", data["public-keys"])
+        self.assertIn("expected-no-value-key", data["public-keys"])
+        self.assertNotIn("should-not-be-found", data["public-keys"])
 
     def test_absent_certificates_produces_empty_public_keys(self):
-        mypk = [{'fingerprint': 'fp1', 'path': 'path1'}]
+        mypk = [{"fingerprint": "fp1", "path": "path1"}]
         self.GoalState.return_value.certificates_xml = None
         shim = wa_shim()
         data = shim.register_with_azure_and_fetch_data(pubkey_info=mypk)
-        self.assertEqual([], data['public-keys'])
+        self.assertEqual([], data["public-keys"])
 
     def test_correct_url_used_for_report_ready(self):
-        self.find_endpoint.return_value = 'test_endpoint'
+        self.find_endpoint.return_value = "test_endpoint"
         shim = wa_shim()
         shim.register_with_azure_and_fetch_data()
-        expected_url = 'http://test_endpoint/machine?comp=health'
+        expected_url = "http://test_endpoint/machine?comp=health"
         self.assertEqual(
             [mock.call(expected_url, data=mock.ANY, extra_headers=mock.ANY)],
-            self.AzureEndpointHttpClient.return_value.post
-                .call_args_list)
+            self.AzureEndpointHttpClient.return_value.post.call_args_list,
+        )
 
     def test_correct_url_used_for_report_failure(self):
-        self.find_endpoint.return_value = 'test_endpoint'
+        self.find_endpoint.return_value = "test_endpoint"
         shim = wa_shim()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
-        expected_url = 'http://test_endpoint/machine?comp=health'
+        shim.register_with_azure_and_report_failure(description="TestDesc")
+        expected_url = "http://test_endpoint/machine?comp=health"
         self.assertEqual(
             [mock.call(expected_url, data=mock.ANY, extra_headers=mock.ANY)],
-            self.AzureEndpointHttpClient.return_value.post
-                .call_args_list)
+            self.AzureEndpointHttpClient.return_value.post.call_args_list,
+        )
 
     def test_goal_state_values_used_for_report_ready(self):
         shim = wa_shim()
         shim.register_with_azure_and_fetch_data()
         posted_document = (
-            self.AzureEndpointHttpClient.return_value.post
-                .call_args[1]['data']
+            self.AzureEndpointHttpClient.return_value.post.call_args[1]["data"]
         )
         self.assertIn(self.test_incarnation, posted_document)
         self.assertIn(self.test_container_id, posted_document)
@@ -1122,10 +1247,9 @@ class TestWALinuxAgentShim(CiTestCase):
 
     def test_goal_state_values_used_for_report_failure(self):
         shim = wa_shim()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
+        shim.register_with_azure_and_report_failure(description="TestDesc")
         posted_document = (
-            self.AzureEndpointHttpClient.return_value.post
-                .call_args[1]['data']
+            self.AzureEndpointHttpClient.return_value.post.call_args[1]["data"]
         )
         self.assertIn(self.test_incarnation, posted_document)
         self.assertIn(self.test_container_id, posted_document)
@@ -1138,57 +1262,66 @@ class TestWALinuxAgentShim(CiTestCase):
             incarnation=escape(self.test_incarnation),
             container_id=escape(self.test_container_id),
             instance_id=escape(self.test_instance_id),
-            health_status=escape('Ready'),
-            health_detail_subsection='')
+            health_status=escape("Ready"),
+            health_detail_subsection="",
+        )
         posted_document = (
-            self.AzureEndpointHttpClient.return_value.post
-                .call_args[1]['data'])
+            self.AzureEndpointHttpClient.return_value.post.call_args[1]["data"]
+        )
         self.assertEqual(health_document, posted_document)
 
     def test_xml_elems_in_report_failure_post(self):
         shim = wa_shim()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
+        shim.register_with_azure_and_report_failure(description="TestDesc")
         health_document = HEALTH_REPORT_XML_TEMPLATE.format(
             incarnation=escape(self.test_incarnation),
             container_id=escape(self.test_container_id),
             instance_id=escape(self.test_instance_id),
-            health_status=escape('NotReady'),
-            health_detail_subsection=HEALTH_DETAIL_SUBSECTION_XML_TEMPLATE
-            .format(
-                health_substatus=escape('ProvisioningFailed'),
-                health_description=escape('TestDesc')))
+            health_status=escape("NotReady"),
+            health_detail_subsection=(
+                HEALTH_DETAIL_SUBSECTION_XML_TEMPLATE.format(
+                    health_substatus=escape("ProvisioningFailed"),
+                    health_description=escape("TestDesc"),
+                )
+            ),
+        )
         posted_document = (
-            self.AzureEndpointHttpClient.return_value.post
-                .call_args[1]['data'])
+            self.AzureEndpointHttpClient.return_value.post.call_args[1]["data"]
+        )
         self.assertEqual(health_document, posted_document)
 
-    @mock.patch.object(azure_helper, 'GoalStateHealthReporter', autospec=True)
+    @mock.patch.object(azure_helper, "GoalStateHealthReporter", autospec=True)
     def test_register_with_azure_and_fetch_data_calls_send_ready_signal(
-            self, m_goal_state_health_reporter):
+        self, m_goal_state_health_reporter
+    ):
         shim = wa_shim()
         shim.register_with_azure_and_fetch_data()
         self.assertEqual(
             1,
-            m_goal_state_health_reporter.return_value.send_ready_signal
-            .call_count)
+            m_goal_state_health_reporter.return_value.send_ready_signal.call_count,  # noqa: E501
+        )
 
-    @mock.patch.object(azure_helper, 'GoalStateHealthReporter', autospec=True)
+    @mock.patch.object(azure_helper, "GoalStateHealthReporter", autospec=True)
     def test_register_with_azure_and_report_failure_calls_send_failure_signal(
-            self, m_goal_state_health_reporter):
+        self, m_goal_state_health_reporter
+    ):
         shim = wa_shim()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
-        m_goal_state_health_reporter.return_value.send_failure_signal \
-            .assert_called_once_with(description='TestDesc')
+        shim.register_with_azure_and_report_failure(description="TestDesc")
+        m_goal_state_health_reporter.return_value.send_failure_signal.assert_called_once_with(  # noqa: E501
+            description="TestDesc"
+        )
 
     def test_register_with_azure_and_report_failure_does_not_need_certificates(
-            self):
+        self,
+    ):
         shim = wa_shim()
         with mock.patch.object(
-            shim, '_fetch_goal_state_from_azure', autospec=True
+            shim, "_fetch_goal_state_from_azure", autospec=True
         ) as m_fetch_goal_state_from_azure:
-            shim.register_with_azure_and_report_failure(description='TestDesc')
+            shim.register_with_azure_and_report_failure(description="TestDesc")
             m_fetch_goal_state_from_azure.assert_called_once_with(
-                need_certificate=False)
+                need_certificate=False
+            )
 
     def test_clean_up_can_be_called_at_any_time(self):
         shim = wa_shim()
@@ -1197,7 +1330,7 @@ class TestWALinuxAgentShim(CiTestCase):
     def test_openssl_manager_not_instantiated_by_shim_report_status(self):
         shim = wa_shim()
         shim.register_with_azure_and_fetch_data()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
+        shim.register_with_azure_and_report_failure(description="TestDesc")
         shim.clean_up()
         self.OpenSSLManager.assert_not_called()
 
@@ -1209,178 +1342,204 @@ class TestWALinuxAgentShim(CiTestCase):
 
     def test_clean_up_after_report_failure(self):
         shim = wa_shim()
-        shim.register_with_azure_and_report_failure(description='TestDesc')
+        shim.register_with_azure_and_report_failure(description="TestDesc")
         shim.clean_up()
         self.OpenSSLManager.return_value.clean_up.assert_not_called()
 
     def test_fetch_goalstate_during_report_ready_raises_exc_on_get_exc(self):
-        self.AzureEndpointHttpClient.return_value.get \
-            .side_effect = SentinelException
+        self.AzureEndpointHttpClient.return_value.get.side_effect = (
+            SentinelException
+        )
         shim = wa_shim()
-        self.assertRaises(SentinelException,
-                          shim.register_with_azure_and_fetch_data)
+        self.assertRaises(
+            SentinelException, shim.register_with_azure_and_fetch_data
+        )
 
     def test_fetch_goalstate_during_report_failure_raises_exc_on_get_exc(self):
-        self.AzureEndpointHttpClient.return_value.get \
-            .side_effect = SentinelException
+        self.AzureEndpointHttpClient.return_value.get.side_effect = (
+            SentinelException
+        )
         shim = wa_shim()
-        self.assertRaises(SentinelException,
-                          shim.register_with_azure_and_report_failure,
-                          description='TestDesc')
+        self.assertRaises(
+            SentinelException,
+            shim.register_with_azure_and_report_failure,
+            description="TestDesc",
+        )
 
     def test_fetch_goalstate_during_report_ready_raises_exc_on_parse_exc(self):
         self.GoalState.side_effect = SentinelException
         shim = wa_shim()
-        self.assertRaises(SentinelException,
-                          shim.register_with_azure_and_fetch_data)
+        self.assertRaises(
+            SentinelException, shim.register_with_azure_and_fetch_data
+        )
 
     def test_fetch_goalstate_during_report_failure_raises_exc_on_parse_exc(
-            self):
+        self,
+    ):
         self.GoalState.side_effect = SentinelException
         shim = wa_shim()
-        self.assertRaises(SentinelException,
-                          shim.register_with_azure_and_report_failure,
-                          description='TestDesc')
+        self.assertRaises(
+            SentinelException,
+            shim.register_with_azure_and_report_failure,
+            description="TestDesc",
+        )
 
     def test_failure_to_send_report_ready_health_doc_bubbles_up(self):
-        self.AzureEndpointHttpClient.return_value.post \
-            .side_effect = SentinelException
+        self.AzureEndpointHttpClient.return_value.post.side_effect = (
+            SentinelException
+        )
         shim = wa_shim()
-        self.assertRaises(SentinelException,
-                          shim.register_with_azure_and_fetch_data)
+        self.assertRaises(
+            SentinelException, shim.register_with_azure_and_fetch_data
+        )
 
     def test_failure_to_send_report_failure_health_doc_bubbles_up(self):
-        self.AzureEndpointHttpClient.return_value.post \
-            .side_effect = SentinelException
+        self.AzureEndpointHttpClient.return_value.post.side_effect = (
+            SentinelException
+        )
         shim = wa_shim()
-        self.assertRaises(SentinelException,
-                          shim.register_with_azure_and_report_failure,
-                          description='TestDesc')
+        self.assertRaises(
+            SentinelException,
+            shim.register_with_azure_and_report_failure,
+            description="TestDesc",
+        )
 
 
 class TestGetMetadataGoalStateXMLAndReportReadyToFabric(CiTestCase):
-
     def setUp(self):
         super(TestGetMetadataGoalStateXMLAndReportReadyToFabric, self).setUp()
         patches = ExitStack()
         self.addCleanup(patches.close)
 
         self.m_shim = patches.enter_context(
-            mock.patch.object(azure_helper, 'WALinuxAgentShim'))
+            mock.patch.object(azure_helper, "WALinuxAgentShim")
+        )
 
     def test_data_from_shim_returned(self):
         ret = azure_helper.get_metadata_from_fabric()
         self.assertEqual(
-            self.m_shim.return_value.register_with_azure_and_fetch_data
-                .return_value,
-            ret)
+            self.m_shim.return_value.register_with_azure_and_fetch_data.return_value,  # noqa: E501
+            ret,
+        )
 
     def test_success_calls_clean_up(self):
         azure_helper.get_metadata_from_fabric()
         self.assertEqual(1, self.m_shim.return_value.clean_up.call_count)
 
-    def test_failure_in_registration_propagates_exc_and_calls_clean_up(
-            self):
-        self.m_shim.return_value.register_with_azure_and_fetch_data \
-            .side_effect = SentinelException
-        self.assertRaises(SentinelException,
-                          azure_helper.get_metadata_from_fabric)
+    def test_failure_in_registration_propagates_exc_and_calls_clean_up(self):
+        self.m_shim.return_value.register_with_azure_and_fetch_data.side_effect = (  # noqa: E501
+            SentinelException
+        )
+        self.assertRaises(
+            SentinelException, azure_helper.get_metadata_from_fabric
+        )
         self.assertEqual(1, self.m_shim.return_value.clean_up.call_count)
 
     def test_calls_shim_register_with_azure_and_fetch_data(self):
         m_pubkey_info = mock.MagicMock()
         azure_helper.get_metadata_from_fabric(
-            pubkey_info=m_pubkey_info, iso_dev="/dev/sr0")
+            pubkey_info=m_pubkey_info, iso_dev="/dev/sr0"
+        )
         self.assertEqual(
             1,
-            self.m_shim.return_value
-                .register_with_azure_and_fetch_data.call_count)
+            self.m_shim.return_value.register_with_azure_and_fetch_data.call_count,  # noqa: E501
+        )
         self.assertEqual(
             mock.call(iso_dev="/dev/sr0", pubkey_info=m_pubkey_info),
-            self.m_shim.return_value
-                .register_with_azure_and_fetch_data.call_args)
+            self.m_shim.return_value.register_with_azure_and_fetch_data.call_args,  # noqa: E501
+        )
 
     def test_instantiates_shim_with_kwargs(self):
         m_fallback_lease_file = mock.MagicMock()
         m_dhcp_options = mock.MagicMock()
         azure_helper.get_metadata_from_fabric(
-            fallback_lease_file=m_fallback_lease_file,
-            dhcp_opts=m_dhcp_options)
+            fallback_lease_file=m_fallback_lease_file, dhcp_opts=m_dhcp_options
+        )
         self.assertEqual(1, self.m_shim.call_count)
         self.assertEqual(
             mock.call(
                 fallback_lease_file=m_fallback_lease_file,
-                dhcp_options=m_dhcp_options),
-            self.m_shim.call_args)
+                dhcp_options=m_dhcp_options,
+            ),
+            self.m_shim.call_args,
+        )
 
 
 class TestGetMetadataGoalStateXMLAndReportFailureToFabric(CiTestCase):
-
     def setUp(self):
         super(
-            TestGetMetadataGoalStateXMLAndReportFailureToFabric, self).setUp()
+            TestGetMetadataGoalStateXMLAndReportFailureToFabric, self
+        ).setUp()
         patches = ExitStack()
         self.addCleanup(patches.close)
 
         self.m_shim = patches.enter_context(
-            mock.patch.object(azure_helper, 'WALinuxAgentShim'))
+            mock.patch.object(azure_helper, "WALinuxAgentShim")
+        )
 
     def test_success_calls_clean_up(self):
         azure_helper.report_failure_to_fabric()
-        self.assertEqual(
-            1,
-            self.m_shim.return_value.clean_up.call_count)
+        self.assertEqual(1, self.m_shim.return_value.clean_up.call_count)
 
     def test_failure_in_shim_report_failure_propagates_exc_and_calls_clean_up(
-            self):
-        self.m_shim.return_value.register_with_azure_and_report_failure \
-            .side_effect = SentinelException
-        self.assertRaises(SentinelException,
-                          azure_helper.report_failure_to_fabric)
-        self.assertEqual(
-            1,
-            self.m_shim.return_value.clean_up.call_count)
+        self,
+    ):
+        self.m_shim.return_value.register_with_azure_and_report_failure.side_effect = (  # noqa: E501
+            SentinelException
+        )
+        self.assertRaises(
+            SentinelException, azure_helper.report_failure_to_fabric
+        )
+        self.assertEqual(1, self.m_shim.return_value.clean_up.call_count)
 
     def test_report_failure_to_fabric_with_desc_calls_shim_report_failure(
-            self):
-        azure_helper.report_failure_to_fabric(description='TestDesc')
-        self.m_shim.return_value.register_with_azure_and_report_failure \
-            .assert_called_once_with(description='TestDesc')
+        self,
+    ):
+        azure_helper.report_failure_to_fabric(description="TestDesc")
+        self.m_shim.return_value.register_with_azure_and_report_failure.assert_called_once_with(  # noqa: E501
+            description="TestDesc"
+        )
 
     def test_report_failure_to_fabric_with_no_desc_calls_shim_report_failure(
-            self):
+        self,
+    ):
         azure_helper.report_failure_to_fabric()
         # default err message description should be shown to the user
         # if no description is passed in
-        self.m_shim.return_value.register_with_azure_and_report_failure \
-            .assert_called_once_with(
-                description=azure_helper
-                .DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE)
+        self.m_shim.return_value.register_with_azure_and_report_failure.assert_called_once_with(  # noqa: E501
+            description=(
+                azure_helper.DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE
+            )
+        )
 
     def test_report_failure_to_fabric_empty_desc_calls_shim_report_failure(
-            self):
-        azure_helper.report_failure_to_fabric(description='')
+        self,
+    ):
+        azure_helper.report_failure_to_fabric(description="")
         # default err message description should be shown to the user
         # if an empty description is passed in
-        self.m_shim.return_value.register_with_azure_and_report_failure \
-            .assert_called_once_with(
-                description=azure_helper
-                .DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE)
+        self.m_shim.return_value.register_with_azure_and_report_failure.assert_called_once_with(  # noqa: E501
+            description=(
+                azure_helper.DEFAULT_REPORT_FAILURE_USER_VISIBLE_MESSAGE
+            )
+        )
 
     def test_instantiates_shim_with_kwargs(self):
         m_fallback_lease_file = mock.MagicMock()
         m_dhcp_options = mock.MagicMock()
         azure_helper.report_failure_to_fabric(
-            fallback_lease_file=m_fallback_lease_file,
-            dhcp_opts=m_dhcp_options)
+            fallback_lease_file=m_fallback_lease_file, dhcp_opts=m_dhcp_options
+        )
         self.m_shim.assert_called_once_with(
             fallback_lease_file=m_fallback_lease_file,
-            dhcp_options=m_dhcp_options)
+            dhcp_options=m_dhcp_options,
+        )
 
 
 class TestExtractIpAddressFromNetworkd(CiTestCase):
 
-    azure_lease = dedent("""\
+    azure_lease = dedent(
+        """\
     # This is private data. Do not parse.
     ADDRESS=10.132.0.5
     NETMASK=255.255.255.255
@@ -1399,7 +1558,8 @@ class TestExtractIpAddressFromNetworkd(CiTestCase):
     ROUTES=10.132.0.1/32,0.0.0.0 0.0.0.0/0,10.132.0.1
     CLIENTID=ff405663a200020000ab11332859494d7a8b4c
     OPTION_245=624c3620
-    """)
+    """
+    )
 
     def setUp(self):
         super(TestExtractIpAddressFromNetworkd, self).setUp()
@@ -1408,21 +1568,25 @@ class TestExtractIpAddressFromNetworkd(CiTestCase):
     def test_no_valid_leases_is_none(self):
         """No valid leases should return None."""
         self.assertIsNone(
-            wa_shim._networkd_get_value_from_leases(self.lease_d))
+            wa_shim._networkd_get_value_from_leases(self.lease_d)
+        )
 
     def test_option_245_is_found_in_single(self):
         """A single valid lease with 245 option should return it."""
-        populate_dir(self.lease_d, {'9': self.azure_lease})
+        populate_dir(self.lease_d, {"9": self.azure_lease})
         self.assertEqual(
-            '624c3620', wa_shim._networkd_get_value_from_leases(self.lease_d))
+            "624c3620", wa_shim._networkd_get_value_from_leases(self.lease_d)
+        )
 
     def test_option_245_not_found_returns_None(self):
         """A valid lease, but no option 245 should return None."""
         populate_dir(
             self.lease_d,
-            {'9': self.azure_lease.replace("OPTION_245", "OPTION_999")})
+            {"9": self.azure_lease.replace("OPTION_245", "OPTION_999")},
+        )
         self.assertIsNone(
-            wa_shim._networkd_get_value_from_leases(self.lease_d))
+            wa_shim._networkd_get_value_from_leases(self.lease_d)
+        )
 
     def test_multiple_returns_first(self):
         """Somewhat arbitrarily return the first address when multiple.
@@ -1432,10 +1596,14 @@ class TestExtractIpAddressFromNetworkd(CiTestCase):
         myval = "624c3601"
         populate_dir(
             self.lease_d,
-            {'9': self.azure_lease,
-             '2': self.azure_lease.replace("624c3620", myval)})
+            {
+                "9": self.azure_lease,
+                "2": self.azure_lease.replace("624c3620", myval),
+            },
+        )
         self.assertEqual(
-            myval, wa_shim._networkd_get_value_from_leases(self.lease_d))
+            myval, wa_shim._networkd_get_value_from_leases(self.lease_d)
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_cloudsigma.py b/tests/unittests/sources/test_cloudsigma.py
index 2eae16ee..a2f26245 100644
--- a/tests/unittests/sources/test_cloudsigma.py
+++ b/tests/unittests/sources/test_cloudsigma.py
@@ -2,12 +2,9 @@
 
 import copy
 
+from cloudinit import distros, helpers, sources
 from cloudinit.cs_utils import Cepko
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import sources
 from cloudinit.sources import DataSourceCloudSigma
-
 from tests.unittests import helpers as test_helpers
 
 SERVER_CONTEXT = {
@@ -28,10 +25,10 @@ SERVER_CONTEXT = {
     "vendor_data": {
         "location": "zrh",
         "cloudinit": "#cloud-config\n\n...",
-    }
+    },
 }
 
-DS_PATH = 'cloudinit.sources.DataSourceCloudSigma.DataSourceCloudSigma'
+DS_PATH = "cloudinit.sources.DataSourceCloudSigma.DataSourceCloudSigma"
 
 
 class CepkoMock(Cepko):
@@ -45,41 +42,48 @@ class CepkoMock(Cepko):
 class DataSourceCloudSigmaTest(test_helpers.CiTestCase):
     def setUp(self):
         super(DataSourceCloudSigmaTest, self).setUp()
-        self.paths = helpers.Paths({'run_dir': self.tmp_dir()})
-        self.add_patch(DS_PATH + '.is_running_in_cloudsigma',
-                       "m_is_container", return_value=True)
+        self.paths = helpers.Paths({"run_dir": self.tmp_dir()})
+        self.add_patch(
+            DS_PATH + ".is_running_in_cloudsigma",
+            "m_is_container",
+            return_value=True,
+        )
 
         distro_cls = distros.fetch("ubuntu")
         distro = distro_cls("ubuntu", cfg={}, paths=self.paths)
         self.datasource = DataSourceCloudSigma.DataSourceCloudSigma(
-            sys_cfg={}, distro=distro, paths=self.paths)
+            sys_cfg={}, distro=distro, paths=self.paths
+        )
         self.datasource.cepko = CepkoMock(SERVER_CONTEXT)
 
     def test_get_hostname(self):
         self.datasource.get_data()
         self.assertEqual("test_server", self.datasource.get_hostname())
-        self.datasource.metadata['name'] = ''
+        self.datasource.metadata["name"] = ""
         self.assertEqual("65b2fb23", self.datasource.get_hostname())
-        utf8_hostname = b'\xd1\x82\xd0\xb5\xd1\x81\xd1\x82'.decode('utf-8')
-        self.datasource.metadata['name'] = utf8_hostname
+        utf8_hostname = b"\xd1\x82\xd0\xb5\xd1\x81\xd1\x82".decode("utf-8")
+        self.datasource.metadata["name"] = utf8_hostname
         self.assertEqual("65b2fb23", self.datasource.get_hostname())
 
     def test_get_public_ssh_keys(self):
         self.datasource.get_data()
-        self.assertEqual([SERVER_CONTEXT['meta']['ssh_public_key']],
-                         self.datasource.get_public_ssh_keys())
+        self.assertEqual(
+            [SERVER_CONTEXT["meta"]["ssh_public_key"]],
+            self.datasource.get_public_ssh_keys(),
+        )
 
     def test_get_instance_id(self):
         self.datasource.get_data()
-        self.assertEqual(SERVER_CONTEXT['uuid'],
-                         self.datasource.get_instance_id())
+        self.assertEqual(
+            SERVER_CONTEXT["uuid"], self.datasource.get_instance_id()
+        )
 
     def test_platform(self):
         """All platform-related attributes are set."""
         self.datasource.get_data()
-        self.assertEqual(self.datasource.cloud_name, 'cloudsigma')
-        self.assertEqual(self.datasource.platform_type, 'cloudsigma')
-        self.assertEqual(self.datasource.subplatform, 'cepko (/dev/ttyS1)')
+        self.assertEqual(self.datasource.cloud_name, "cloudsigma")
+        self.assertEqual(self.datasource.platform_type, "cloudsigma")
+        self.assertEqual(self.datasource.subplatform, "cepko (/dev/ttyS1)")
 
     def test_metadata(self):
         self.datasource.get_data()
@@ -87,22 +91,26 @@ class DataSourceCloudSigmaTest(test_helpers.CiTestCase):
 
     def test_user_data(self):
         self.datasource.get_data()
-        self.assertEqual(self.datasource.userdata_raw,
-                         SERVER_CONTEXT['meta']['cloudinit-user-data'])
+        self.assertEqual(
+            self.datasource.userdata_raw,
+            SERVER_CONTEXT["meta"]["cloudinit-user-data"],
+        )
 
     def test_encoded_user_data(self):
         encoded_context = copy.deepcopy(SERVER_CONTEXT)
-        encoded_context['meta']['base64_fields'] = 'cloudinit-user-data'
-        encoded_context['meta']['cloudinit-user-data'] = 'aGkgd29ybGQK'
+        encoded_context["meta"]["base64_fields"] = "cloudinit-user-data"
+        encoded_context["meta"]["cloudinit-user-data"] = "aGkgd29ybGQK"
         self.datasource.cepko = CepkoMock(encoded_context)
         self.datasource.get_data()
 
-        self.assertEqual(self.datasource.userdata_raw, b'hi world\n')
+        self.assertEqual(self.datasource.userdata_raw, b"hi world\n")
 
     def test_vendor_data(self):
         self.datasource.get_data()
-        self.assertEqual(self.datasource.vendordata_raw,
-                         SERVER_CONTEXT['vendor_data']['cloudinit'])
+        self.assertEqual(
+            self.datasource.vendordata_raw,
+            SERVER_CONTEXT["vendor_data"]["cloudinit"],
+        )
 
     def test_lack_of_vendor_data(self):
         stripped_context = copy.deepcopy(SERVER_CONTEXT)
@@ -125,13 +133,13 @@ class DsLoads(test_helpers.TestCase):
     def test_get_datasource_list_returns_in_local(self):
         deps = (sources.DEP_FILESYSTEM,)
         ds_list = DataSourceCloudSigma.get_datasource_list(deps)
-        self.assertEqual(ds_list,
-                         [DataSourceCloudSigma.DataSourceCloudSigma])
+        self.assertEqual(ds_list, [DataSourceCloudSigma.DataSourceCloudSigma])
 
     def test_list_sources_finds_ds(self):
         found = sources.list_sources(
-            ['CloudSigma'], (sources.DEP_FILESYSTEM,), ['cloudinit.sources'])
-        self.assertEqual([DataSourceCloudSigma.DataSourceCloudSigma],
-                         found)
+            ["CloudSigma"], (sources.DEP_FILESYSTEM,), ["cloudinit.sources"]
+        )
+        self.assertEqual([DataSourceCloudSigma.DataSourceCloudSigma], found)
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_cloudstack.py b/tests/unittests/sources/test_cloudstack.py
index 2b1a1b70..f7c69f91 100644
--- a/tests/unittests/sources/test_cloudstack.py
+++ b/tests/unittests/sources/test_cloudstack.py
@@ -1,80 +1,90 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import helpers
-from cloudinit import util
-from cloudinit.sources.DataSourceCloudStack import (
-    DataSourceCloudStack, get_latest_lease)
-
-from tests.unittests.helpers import CiTestCase, ExitStack, mock
-
 import os
 import time
 
-MOD_PATH = 'cloudinit.sources.DataSourceCloudStack'
-DS_PATH = MOD_PATH + '.DataSourceCloudStack'
+from cloudinit import helpers, util
+from cloudinit.sources.DataSourceCloudStack import (
+    DataSourceCloudStack,
+    get_latest_lease,
+)
+from tests.unittests.helpers import CiTestCase, ExitStack, mock
+
+MOD_PATH = "cloudinit.sources.DataSourceCloudStack"
+DS_PATH = MOD_PATH + ".DataSourceCloudStack"
 
 
 class TestCloudStackPasswordFetching(CiTestCase):
-
     def setUp(self):
         super(TestCloudStackPasswordFetching, self).setUp()
         self.patches = ExitStack()
         self.addCleanup(self.patches.close)
         mod_name = MOD_PATH
-        self.patches.enter_context(mock.patch('{0}.ec2'.format(mod_name)))
-        self.patches.enter_context(mock.patch('{0}.uhelp'.format(mod_name)))
+        self.patches.enter_context(mock.patch("{0}.ec2".format(mod_name)))
+        self.patches.enter_context(mock.patch("{0}.uhelp".format(mod_name)))
         default_gw = "192.201.20.0"
         get_latest_lease = mock.MagicMock(return_value=None)
-        self.patches.enter_context(mock.patch(
-            mod_name + '.get_latest_lease', get_latest_lease))
+        self.patches.enter_context(
+            mock.patch(mod_name + ".get_latest_lease", get_latest_lease)
+        )
 
         get_default_gw = mock.MagicMock(return_value=default_gw)
-        self.patches.enter_context(mock.patch(
-            mod_name + '.get_default_gateway', get_default_gw))
+        self.patches.enter_context(
+            mock.patch(mod_name + ".get_default_gateway", get_default_gw)
+        )
 
         get_networkd_server_address = mock.MagicMock(return_value=None)
-        self.patches.enter_context(mock.patch(
-            mod_name + '.dhcp.networkd_get_option_from_leases',
-            get_networkd_server_address))
+        self.patches.enter_context(
+            mock.patch(
+                mod_name + ".dhcp.networkd_get_option_from_leases",
+                get_networkd_server_address,
+            )
+        )
         self.tmp = self.tmp_dir()
 
     def _set_password_server_response(self, response_string):
-        subp = mock.MagicMock(return_value=(response_string, ''))
+        subp = mock.MagicMock(return_value=(response_string, ""))
         self.patches.enter_context(
-            mock.patch('cloudinit.sources.DataSourceCloudStack.subp.subp',
-                       subp))
+            mock.patch(
+                "cloudinit.sources.DataSourceCloudStack.subp.subp", subp
+            )
+        )
         return subp
 
     def test_empty_password_doesnt_create_config(self):
-        self._set_password_server_response('')
+        self._set_password_server_response("")
         ds = DataSourceCloudStack(
-            {}, None, helpers.Paths({'run_dir': self.tmp}))
+            {}, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds.get_data()
         self.assertEqual({}, ds.get_config_obj())
 
     def test_saved_password_doesnt_create_config(self):
-        self._set_password_server_response('saved_password')
+        self._set_password_server_response("saved_password")
         ds = DataSourceCloudStack(
-            {}, None, helpers.Paths({'run_dir': self.tmp}))
+            {}, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds.get_data()
         self.assertEqual({}, ds.get_config_obj())
 
-    @mock.patch(DS_PATH + '.wait_for_metadata_service')
+    @mock.patch(DS_PATH + ".wait_for_metadata_service")
     def test_password_sets_password(self, m_wait):
         m_wait.return_value = True
-        password = 'SekritSquirrel'
+        password = "SekritSquirrel"
         self._set_password_server_response(password)
         ds = DataSourceCloudStack(
-            {}, None, helpers.Paths({'run_dir': self.tmp}))
+            {}, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds.get_data()
-        self.assertEqual(password, ds.get_config_obj()['password'])
+        self.assertEqual(password, ds.get_config_obj()["password"])
 
-    @mock.patch(DS_PATH + '.wait_for_metadata_service')
+    @mock.patch(DS_PATH + ".wait_for_metadata_service")
     def test_bad_request_doesnt_stop_ds_from_working(self, m_wait):
         m_wait.return_value = True
-        self._set_password_server_response('bad_request')
+        self._set_password_server_response("bad_request")
         ds = DataSourceCloudStack(
-            {}, None, helpers.Paths({'run_dir': self.tmp}))
+            {}, None, helpers.Paths({"run_dir": self.tmp})
+        )
         self.assertTrue(ds.get_data())
 
     def assertRequestTypesSent(self, subp, expected_request_types):
@@ -82,42 +92,44 @@ class TestCloudStackPasswordFetching(CiTestCase):
         for call in subp.call_args_list:
             args = call[0][0]
             for arg in args:
-                if arg.startswith('DomU_Request'):
+                if arg.startswith("DomU_Request"):
                     request_types.append(arg.split()[1])
         self.assertEqual(expected_request_types, request_types)
 
-    @mock.patch(DS_PATH + '.wait_for_metadata_service')
+    @mock.patch(DS_PATH + ".wait_for_metadata_service")
     def test_valid_response_means_password_marked_as_saved(self, m_wait):
         m_wait.return_value = True
-        password = 'SekritSquirrel'
+        password = "SekritSquirrel"
         subp = self._set_password_server_response(password)
         ds = DataSourceCloudStack(
-            {}, None, helpers.Paths({'run_dir': self.tmp}))
+            {}, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds.get_data()
-        self.assertRequestTypesSent(subp,
-                                    ['send_my_password', 'saved_password'])
+        self.assertRequestTypesSent(
+            subp, ["send_my_password", "saved_password"]
+        )
 
     def _check_password_not_saved_for(self, response_string):
         subp = self._set_password_server_response(response_string)
         ds = DataSourceCloudStack(
-            {}, None, helpers.Paths({'run_dir': self.tmp}))
-        with mock.patch(DS_PATH + '.wait_for_metadata_service') as m_wait:
+            {}, None, helpers.Paths({"run_dir": self.tmp})
+        )
+        with mock.patch(DS_PATH + ".wait_for_metadata_service") as m_wait:
             m_wait.return_value = True
             ds.get_data()
-        self.assertRequestTypesSent(subp, ['send_my_password'])
+        self.assertRequestTypesSent(subp, ["send_my_password"])
 
     def test_password_not_saved_if_empty(self):
-        self._check_password_not_saved_for('')
+        self._check_password_not_saved_for("")
 
     def test_password_not_saved_if_already_saved(self):
-        self._check_password_not_saved_for('saved_password')
+        self._check_password_not_saved_for("saved_password")
 
     def test_password_not_saved_if_bad_request(self):
-        self._check_password_not_saved_for('bad_request')
+        self._check_password_not_saved_for("bad_request")
 
 
 class TestGetLatestLease(CiTestCase):
-
     def _populate_dir_list(self, bdir, files):
         """populate_dir_list([(name, data), (name, data)])
 
@@ -133,8 +145,9 @@ class TestGetLatestLease(CiTestCase):
     def _pop_and_test(self, files, expected):
         lease_d = self.tmp_dir()
         self._populate_dir_list(lease_d, files)
-        self.assertEqual(self.tmp_path(expected, lease_d),
-                         get_latest_lease(lease_d))
+        self.assertEqual(
+            self.tmp_path(expected, lease_d), get_latest_lease(lease_d)
+        )
 
     def test_skips_dhcpv6_files(self):
         """files started with dhclient6 should be skipped."""
@@ -161,9 +174,15 @@ class TestGetLatestLease(CiTestCase):
     def test_ignores_by_extension(self):
         """only .lease or .leases file should be considered."""
 
-        self._pop_and_test(["dhclient.lease", "dhclient.lease.bk",
-                            "dhclient.lease-old", "dhclient.leaselease"],
-                           "dhclient.lease")
+        self._pop_and_test(
+            [
+                "dhclient.lease",
+                "dhclient.lease.bk",
+                "dhclient.lease-old",
+                "dhclient.leaselease",
+            ],
+            "dhclient.lease",
+        )
 
     def test_selects_newest_matching(self):
         """If multiple files match, the newest written should be used."""
diff --git a/tests/unittests/sources/test_common.py b/tests/unittests/sources/test_common.py
index bb8fa530..a5bdb629 100644
--- a/tests/unittests/sources/test_common.py
+++ b/tests/unittests/sources/test_common.py
@@ -1,39 +1,34 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import settings
-from cloudinit import sources
-from cloudinit import type_utils
-from cloudinit.sources import (
-    DataSource,
-    DataSourceAliYun as AliYun,
-    DataSourceAltCloud as AltCloud,
-    DataSourceAzure as Azure,
-    DataSourceBigstep as Bigstep,
-    DataSourceCloudSigma as CloudSigma,
-    DataSourceCloudStack as CloudStack,
-    DataSourceConfigDrive as ConfigDrive,
-    DataSourceDigitalOcean as DigitalOcean,
-    DataSourceEc2 as Ec2,
-    DataSourceExoscale as Exoscale,
-    DataSourceGCE as GCE,
-    DataSourceHetzner as Hetzner,
-    DataSourceIBMCloud as IBMCloud,
-    DataSourceLXD as LXD,
-    DataSourceMAAS as MAAS,
-    DataSourceNoCloud as NoCloud,
-    DataSourceOpenNebula as OpenNebula,
-    DataSourceOpenStack as OpenStack,
-    DataSourceOracle as Oracle,
-    DataSourceOVF as OVF,
-    DataSourceRbxCloud as RbxCloud,
-    DataSourceScaleway as Scaleway,
-    DataSourceSmartOS as SmartOS,
-    DataSourceUpCloud as UpCloud,
-    DataSourceVultr as Vultr,
-    DataSourceVMware as VMware,
-)
+from cloudinit import settings, sources, type_utils
+from cloudinit.sources import DataSource
+from cloudinit.sources import DataSourceAliYun as AliYun
+from cloudinit.sources import DataSourceAltCloud as AltCloud
+from cloudinit.sources import DataSourceAzure as Azure
+from cloudinit.sources import DataSourceBigstep as Bigstep
+from cloudinit.sources import DataSourceCloudSigma as CloudSigma
+from cloudinit.sources import DataSourceCloudStack as CloudStack
+from cloudinit.sources import DataSourceConfigDrive as ConfigDrive
+from cloudinit.sources import DataSourceDigitalOcean as DigitalOcean
+from cloudinit.sources import DataSourceEc2 as Ec2
+from cloudinit.sources import DataSourceExoscale as Exoscale
+from cloudinit.sources import DataSourceGCE as GCE
+from cloudinit.sources import DataSourceHetzner as Hetzner
+from cloudinit.sources import DataSourceIBMCloud as IBMCloud
+from cloudinit.sources import DataSourceLXD as LXD
+from cloudinit.sources import DataSourceMAAS as MAAS
+from cloudinit.sources import DataSourceNoCloud as NoCloud
 from cloudinit.sources import DataSourceNone as DSNone
-
+from cloudinit.sources import DataSourceOpenNebula as OpenNebula
+from cloudinit.sources import DataSourceOpenStack as OpenStack
+from cloudinit.sources import DataSourceOracle as Oracle
+from cloudinit.sources import DataSourceOVF as OVF
+from cloudinit.sources import DataSourceRbxCloud as RbxCloud
+from cloudinit.sources import DataSourceScaleway as Scaleway
+from cloudinit.sources import DataSourceSmartOS as SmartOS
+from cloudinit.sources import DataSourceUpCloud as UpCloud
+from cloudinit.sources import DataSourceVMware as VMware
+from cloudinit.sources import DataSourceVultr as Vultr
 from tests.unittests import helpers as test_helpers
 
 DEFAULT_LOCAL = [
@@ -78,24 +73,27 @@ DEFAULT_NETWORK = [
 
 
 class ExpectedDataSources(test_helpers.TestCase):
-    builtin_list = settings.CFG_BUILTIN['datasource_list']
+    builtin_list = settings.CFG_BUILTIN["datasource_list"]
     deps_local = [sources.DEP_FILESYSTEM]
     deps_network = [sources.DEP_FILESYSTEM, sources.DEP_NETWORK]
     pkg_list = [type_utils.obj_name(sources)]
 
     def test_expected_default_local_sources_found(self):
         found = sources.list_sources(
-            self.builtin_list, self.deps_local, self.pkg_list)
+            self.builtin_list, self.deps_local, self.pkg_list
+        )
         self.assertEqual(set(DEFAULT_LOCAL), set(found))
 
     def test_expected_default_network_sources_found(self):
         found = sources.list_sources(
-            self.builtin_list, self.deps_network, self.pkg_list)
+            self.builtin_list, self.deps_network, self.pkg_list
+        )
         self.assertEqual(set(DEFAULT_NETWORK), set(found))
 
     def test_expected_nondefault_network_sources_found(self):
         found = sources.list_sources(
-            ['AliYun'], self.deps_network, self.pkg_list)
+            ["AliYun"], self.deps_network, self.pkg_list
+        )
         self.assertEqual(set([AliYun.DataSourceAliYun]), set(found))
 
 
@@ -103,19 +101,23 @@ class TestDataSourceInvariants(test_helpers.TestCase):
     def test_data_sources_have_valid_network_config_sources(self):
         for ds in DEFAULT_LOCAL + DEFAULT_NETWORK:
             for cfg_src in ds.network_config_sources:
-                fail_msg = ('{} has an invalid network_config_sources entry:'
-                            ' {}'.format(str(ds), cfg_src))
-                self.assertTrue(hasattr(sources.NetworkConfigSource, cfg_src),
-                                fail_msg)
+                fail_msg = (
+                    "{} has an invalid network_config_sources entry:"
+                    " {}".format(str(ds), cfg_src)
+                )
+                self.assertTrue(
+                    hasattr(sources.NetworkConfigSource, cfg_src), fail_msg
+                )
 
     def test_expected_dsname_defined(self):
         for ds in DEFAULT_LOCAL + DEFAULT_NETWORK:
             fail_msg = (
-                '{} has an invalid / missing dsname property: {}'.format(
+                "{} has an invalid / missing dsname property: {}".format(
                     str(ds), str(ds.dsname)
                 )
             )
             self.assertNotEqual(ds.dsname, DataSource.dsname, fail_msg)
             self.assertIsNotNone(ds.dsname)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_configdrive.py b/tests/unittests/sources/test_configdrive.py
index 775d0622..1fc40a0e 100644
--- a/tests/unittests/sources/test_configdrive.py
+++ b/tests/unittests/sources/test_configdrive.py
@@ -1,139 +1,229 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from copy import copy, deepcopy
 import json
 import os
+from copy import copy, deepcopy
 
-from cloudinit import helpers
-from cloudinit.net import eni
-from cloudinit.net import network_state
-from cloudinit import settings
+from cloudinit import helpers, settings, util
+from cloudinit.net import eni, network_state
 from cloudinit.sources import DataSourceConfigDrive as ds
 from cloudinit.sources.helpers import openstack
-from cloudinit import util
-
 from tests.unittests.helpers import CiTestCase, ExitStack, mock, populate_dir
 
-
-PUBKEY = 'ssh-rsa AAAAB3NzaC1....sIkJhq8wdX+4I3A4cYbYP ubuntu@server-460\n'
+PUBKEY = "ssh-rsa AAAAB3NzaC1....sIkJhq8wdX+4I3A4cYbYP ubuntu@server-460\n"
 EC2_META = {
-    'ami-id': 'ami-00000001',
-    'ami-launch-index': 0,
-    'ami-manifest-path': 'FIXME',
-    'block-device-mapping': {
-        'ami': 'sda1',
-        'ephemeral0': 'sda2',
-        'root': '/dev/sda1',
-        'swap': 'sda3'},
-    'hostname': 'sm-foo-test.novalocal',
-    'instance-action': 'none',
-    'instance-id': 'i-00000001',
-    'instance-type': 'm1.tiny',
-    'local-hostname': 'sm-foo-test.novalocal',
-    'local-ipv4': None,
-    'placement': {'availability-zone': 'nova'},
-    'public-hostname': 'sm-foo-test.novalocal',
-    'public-ipv4': '',
-    'public-keys': {'0': {'openssh-key': PUBKEY}},
-    'reservation-id': 'r-iru5qm4m',
-    'security-groups': ['default']
+    "ami-id": "ami-00000001",
+    "ami-launch-index": 0,
+    "ami-manifest-path": "FIXME",
+    "block-device-mapping": {
+        "ami": "sda1",
+        "ephemeral0": "sda2",
+        "root": "/dev/sda1",
+        "swap": "sda3",
+    },
+    "hostname": "sm-foo-test.novalocal",
+    "instance-action": "none",
+    "instance-id": "i-00000001",
+    "instance-type": "m1.tiny",
+    "local-hostname": "sm-foo-test.novalocal",
+    "local-ipv4": None,
+    "placement": {"availability-zone": "nova"},
+    "public-hostname": "sm-foo-test.novalocal",
+    "public-ipv4": "",
+    "public-keys": {"0": {"openssh-key": PUBKEY}},
+    "reservation-id": "r-iru5qm4m",
+    "security-groups": ["default"],
 }
-USER_DATA = b'#!/bin/sh\necho This is user data\n'
+USER_DATA = b"#!/bin/sh\necho This is user data\n"
 OSTACK_META = {
-    'availability_zone': 'nova',
-    'files': [{'content_path': '/content/0000', 'path': '/etc/foo.cfg'},
-              {'content_path': '/content/0001', 'path': '/etc/bar/bar.cfg'}],
-    'hostname': 'sm-foo-test.novalocal',
-    'meta': {'dsmode': 'local', 'my-meta': 'my-value'},
-    'name': 'sm-foo-test',
-    'public_keys': {'mykey': PUBKEY},
-    'uuid': 'b0fa911b-69d4-4476-bbe2-1c92bff6535c'}
-
-CONTENT_0 = b'This is contents of /etc/foo.cfg\n'
-CONTENT_1 = b'# this is /etc/bar/bar.cfg\n'
+    "availability_zone": "nova",
+    "files": [
+        {"content_path": "/content/0000", "path": "/etc/foo.cfg"},
+        {"content_path": "/content/0001", "path": "/etc/bar/bar.cfg"},
+    ],
+    "hostname": "sm-foo-test.novalocal",
+    "meta": {"dsmode": "local", "my-meta": "my-value"},
+    "name": "sm-foo-test",
+    "public_keys": {"mykey": PUBKEY},
+    "uuid": "b0fa911b-69d4-4476-bbe2-1c92bff6535c",
+}
+
+CONTENT_0 = b"This is contents of /etc/foo.cfg\n"
+CONTENT_1 = b"# this is /etc/bar/bar.cfg\n"
 NETWORK_DATA = {
-    'services': [
-        {'type': 'dns', 'address': '199.204.44.24'},
-        {'type': 'dns', 'address': '199.204.47.54'}
+    "services": [
+        {"type": "dns", "address": "199.204.44.24"},
+        {"type": "dns", "address": "199.204.47.54"},
+    ],
+    "links": [
+        {
+            "vif_id": "2ecc7709-b3f7-4448-9580-e1ec32d75bbd",
+            "ethernet_mac_address": "fa:16:3e:69:b0:58",
+            "type": "ovs",
+            "mtu": None,
+            "id": "tap2ecc7709-b3",
+        },
+        {
+            "vif_id": "2f88d109-5b57-40e6-af32-2472df09dc33",
+            "ethernet_mac_address": "fa:16:3e:d4:57:ad",
+            "type": "ovs",
+            "mtu": None,
+            "id": "tap2f88d109-5b",
+        },
+        {
+            "vif_id": "1a5382f8-04c5-4d75-ab98-d666c1ef52cc",
+            "ethernet_mac_address": "fa:16:3e:05:30:fe",
+            "type": "ovs",
+            "mtu": None,
+            "id": "tap1a5382f8-04",
+            "name": "nic0",
+        },
     ],
-    'links': [
-        {'vif_id': '2ecc7709-b3f7-4448-9580-e1ec32d75bbd',
-         'ethernet_mac_address': 'fa:16:3e:69:b0:58',
-         'type': 'ovs', 'mtu': None, 'id': 'tap2ecc7709-b3'},
-        {'vif_id': '2f88d109-5b57-40e6-af32-2472df09dc33',
-         'ethernet_mac_address': 'fa:16:3e:d4:57:ad',
-         'type': 'ovs', 'mtu': None, 'id': 'tap2f88d109-5b'},
-        {'vif_id': '1a5382f8-04c5-4d75-ab98-d666c1ef52cc',
-         'ethernet_mac_address': 'fa:16:3e:05:30:fe',
-         'type': 'ovs', 'mtu': None, 'id': 'tap1a5382f8-04', 'name': 'nic0'}
+    "networks": [
+        {
+            "link": "tap2ecc7709-b3",
+            "type": "ipv4_dhcp",
+            "network_id": "6d6357ac-0f70-4afa-8bd7-c274cc4ea235",
+            "id": "network0",
+        },
+        {
+            "link": "tap2f88d109-5b",
+            "type": "ipv4_dhcp",
+            "network_id": "d227a9b3-6960-4d94-8976-ee5788b44f54",
+            "id": "network1",
+        },
+        {
+            "link": "tap1a5382f8-04",
+            "type": "ipv4_dhcp",
+            "network_id": "dab2ba57-cae2-4311-a5ed-010b263891f5",
+            "id": "network2",
+        },
     ],
-    'networks': [
-        {'link': 'tap2ecc7709-b3', 'type': 'ipv4_dhcp',
-         'network_id': '6d6357ac-0f70-4afa-8bd7-c274cc4ea235',
-         'id': 'network0'},
-        {'link': 'tap2f88d109-5b', 'type': 'ipv4_dhcp',
-         'network_id': 'd227a9b3-6960-4d94-8976-ee5788b44f54',
-         'id': 'network1'},
-        {'link': 'tap1a5382f8-04', 'type': 'ipv4_dhcp',
-         'network_id': 'dab2ba57-cae2-4311-a5ed-010b263891f5',
-         'id': 'network2'}
-    ]
 }
 
 NETWORK_DATA_2 = {
     "services": [
         {"type": "dns", "address": "1.1.1.191"},
-        {"type": "dns", "address": "1.1.1.4"}],
+        {"type": "dns", "address": "1.1.1.4"},
+    ],
     "networks": [
-        {"network_id": "d94bbe94-7abc-48d4-9c82-4628ea26164a", "type": "ipv4",
-         "netmask": "255.255.255.248", "link": "eth0",
-         "routes": [{"netmask": "0.0.0.0", "network": "0.0.0.0",
-                     "gateway": "2.2.2.9"}],
-         "ip_address": "2.2.2.10", "id": "network0-ipv4"},
-        {"network_id": "ca447c83-6409-499b-aaef-6ad1ae995348", "type": "ipv4",
-         "netmask": "255.255.255.224", "link": "eth1",
-         "routes": [], "ip_address": "3.3.3.24", "id": "network1-ipv4"}],
+        {
+            "network_id": "d94bbe94-7abc-48d4-9c82-4628ea26164a",
+            "type": "ipv4",
+            "netmask": "255.255.255.248",
+            "link": "eth0",
+            "routes": [
+                {
+                    "netmask": "0.0.0.0",
+                    "network": "0.0.0.0",
+                    "gateway": "2.2.2.9",
+                }
+            ],
+            "ip_address": "2.2.2.10",
+            "id": "network0-ipv4",
+        },
+        {
+            "network_id": "ca447c83-6409-499b-aaef-6ad1ae995348",
+            "type": "ipv4",
+            "netmask": "255.255.255.224",
+            "link": "eth1",
+            "routes": [],
+            "ip_address": "3.3.3.24",
+            "id": "network1-ipv4",
+        },
+    ],
     "links": [
-        {"ethernet_mac_address": "fa:16:3e:dd:50:9a", "mtu": 1500,
-         "type": "vif", "id": "eth0", "vif_id": "vif-foo1"},
-        {"ethernet_mac_address": "fa:16:3e:a8:14:69", "mtu": 1500,
-         "type": "vif", "id": "eth1", "vif_id": "vif-foo2"}]
+        {
+            "ethernet_mac_address": "fa:16:3e:dd:50:9a",
+            "mtu": 1500,
+            "type": "vif",
+            "id": "eth0",
+            "vif_id": "vif-foo1",
+        },
+        {
+            "ethernet_mac_address": "fa:16:3e:a8:14:69",
+            "mtu": 1500,
+            "type": "vif",
+            "id": "eth1",
+            "vif_id": "vif-foo2",
+        },
+    ],
 }
 
 # This network data ha 'tap' or null type for a link.
 NETWORK_DATA_3 = {
-    "services": [{"type": "dns", "address": "172.16.36.11"},
-                 {"type": "dns", "address": "172.16.36.12"}],
+    "services": [
+        {"type": "dns", "address": "172.16.36.11"},
+        {"type": "dns", "address": "172.16.36.12"},
+    ],
     "networks": [
-        {"network_id": "7c41450c-ba44-401a-9ab1-1604bb2da51e",
-         "type": "ipv4", "netmask": "255.255.255.128",
-         "link": "tap77a0dc5b-72", "ip_address": "172.17.48.18",
-         "id": "network0",
-         "routes": [{"netmask": "0.0.0.0", "network": "0.0.0.0",
-                     "gateway": "172.17.48.1"}]},
-        {"network_id": "7c41450c-ba44-401a-9ab1-1604bb2da51e",
-         "type": "ipv6", "netmask": "ffff:ffff:ffff:ffff::",
-         "link": "tap77a0dc5b-72",
-         "ip_address": "fdb8:52d0:9d14:0:f816:3eff:fe9f:70d",
-         "id": "network1",
-         "routes": [{"netmask": "::", "network": "::",
-                     "gateway": "fdb8:52d0:9d14::1"}]},
-        {"network_id": "1f53cb0e-72d3-47c7-94b9-ff4397c5fe54",
-         "type": "ipv4", "netmask": "255.255.255.128",
-         "link": "tap7d6b7bec-93", "ip_address": "172.16.48.13",
-         "id": "network2",
-         "routes": [{"netmask": "0.0.0.0", "network": "0.0.0.0",
-                    "gateway": "172.16.48.1"},
-                    {"netmask": "255.255.0.0", "network": "172.16.0.0",
-                     "gateway": "172.16.48.1"}]}],
+        {
+            "network_id": "7c41450c-ba44-401a-9ab1-1604bb2da51e",
+            "type": "ipv4",
+            "netmask": "255.255.255.128",
+            "link": "tap77a0dc5b-72",
+            "ip_address": "172.17.48.18",
+            "id": "network0",
+            "routes": [
+                {
+                    "netmask": "0.0.0.0",
+                    "network": "0.0.0.0",
+                    "gateway": "172.17.48.1",
+                }
+            ],
+        },
+        {
+            "network_id": "7c41450c-ba44-401a-9ab1-1604bb2da51e",
+            "type": "ipv6",
+            "netmask": "ffff:ffff:ffff:ffff::",
+            "link": "tap77a0dc5b-72",
+            "ip_address": "fdb8:52d0:9d14:0:f816:3eff:fe9f:70d",
+            "id": "network1",
+            "routes": [
+                {
+                    "netmask": "::",
+                    "network": "::",
+                    "gateway": "fdb8:52d0:9d14::1",
+                }
+            ],
+        },
+        {
+            "network_id": "1f53cb0e-72d3-47c7-94b9-ff4397c5fe54",
+            "type": "ipv4",
+            "netmask": "255.255.255.128",
+            "link": "tap7d6b7bec-93",
+            "ip_address": "172.16.48.13",
+            "id": "network2",
+            "routes": [
+                {
+                    "netmask": "0.0.0.0",
+                    "network": "0.0.0.0",
+                    "gateway": "172.16.48.1",
+                },
+                {
+                    "netmask": "255.255.0.0",
+                    "network": "172.16.0.0",
+                    "gateway": "172.16.48.1",
+                },
+            ],
+        },
+    ],
     "links": [
-        {"ethernet_mac_address": "fa:16:3e:dd:50:9a", "mtu": None,
-         "type": "tap", "id": "tap77a0dc5b-72",
-         "vif_id": "77a0dc5b-720e-41b7-bfa7-1b2ff62e0d48"},
-        {"ethernet_mac_address": "fa:16:3e:a8:14:69", "mtu": None,
-         "type": None, "id": "tap7d6b7bec-93",
-         "vif_id": "7d6b7bec-93e6-4c03-869a-ddc5014892d5"}
-    ]
+        {
+            "ethernet_mac_address": "fa:16:3e:dd:50:9a",
+            "mtu": None,
+            "type": "tap",
+            "id": "tap77a0dc5b-72",
+            "vif_id": "77a0dc5b-720e-41b7-bfa7-1b2ff62e0d48",
+        },
+        {
+            "ethernet_mac_address": "fa:16:3e:a8:14:69",
+            "mtu": None,
+            "type": None,
+            "id": "tap7d6b7bec-93",
+            "vif_id": "7d6b7bec-93e6-4c03-869a-ddc5014892d5",
+        },
+    ],
 }
 
 BOND_MAC = "fa:16:3e:b3:72:36"
@@ -143,122 +233,182 @@ NETWORK_DATA_BOND = {
         {"type": "dns", "address": "1.1.1.4"},
     ],
     "networks": [
-        {"id": "network2-ipv4", "ip_address": "2.2.2.13",
-         "link": "vlan2", "netmask": "255.255.255.248",
-         "network_id": "4daf5ce8-38cf-4240-9f1a-04e86d7c6117",
-         "type": "ipv4",
-         "routes": [{"netmask": "0.0.0.0", "network": "0.0.0.0",
-                    "gateway": "2.2.2.9"}]},
-        {"id": "network3-ipv4", "ip_address": "10.0.1.5",
-         "link": "vlan3", "netmask": "255.255.255.248",
-         "network_id": "a9e2f47c-3c43-4782-94d0-e1eeef1c8c9d",
-         "type": "ipv4",
-         "routes": [{"netmask": "255.255.255.255",
-                    "network": "192.168.1.0", "gateway": "10.0.1.1"}]}
+        {
+            "id": "network2-ipv4",
+            "ip_address": "2.2.2.13",
+            "link": "vlan2",
+            "netmask": "255.255.255.248",
+            "network_id": "4daf5ce8-38cf-4240-9f1a-04e86d7c6117",
+            "type": "ipv4",
+            "routes": [
+                {
+                    "netmask": "0.0.0.0",
+                    "network": "0.0.0.0",
+                    "gateway": "2.2.2.9",
+                }
+            ],
+        },
+        {
+            "id": "network3-ipv4",
+            "ip_address": "10.0.1.5",
+            "link": "vlan3",
+            "netmask": "255.255.255.248",
+            "network_id": "a9e2f47c-3c43-4782-94d0-e1eeef1c8c9d",
+            "type": "ipv4",
+            "routes": [
+                {
+                    "netmask": "255.255.255.255",
+                    "network": "192.168.1.0",
+                    "gateway": "10.0.1.1",
+                }
+            ],
+        },
     ],
     "links": [
-        {"ethernet_mac_address": "0c:c4:7a:34:6e:3c",
-         "id": "eth0", "mtu": 1500, "type": "phy"},
-        {"ethernet_mac_address": "0c:c4:7a:34:6e:3d",
-         "id": "eth1", "mtu": 1500, "type": "phy"},
-        {"bond_links": ["eth0", "eth1"],
-         "bond_miimon": 100, "bond_mode": "4",
-         "bond_xmit_hash_policy": "layer3+4",
-         "ethernet_mac_address": BOND_MAC,
-         "id": "bond0", "type": "bond"},
-        {"ethernet_mac_address": "fa:16:3e:b3:72:30",
-         "id": "vlan2", "type": "vlan", "vlan_id": 602,
-         "vlan_link": "bond0", "vlan_mac_address": "fa:16:3e:b3:72:30"},
-        {"ethernet_mac_address": "fa:16:3e:66:ab:a6",
-         "id": "vlan3", "type": "vlan", "vlan_id": 612, "vlan_link": "bond0",
-         "vlan_mac_address": "fa:16:3e:66:ab:a6"}
-    ]
+        {
+            "ethernet_mac_address": "0c:c4:7a:34:6e:3c",
+            "id": "eth0",
+            "mtu": 1500,
+            "type": "phy",
+        },
+        {
+            "ethernet_mac_address": "0c:c4:7a:34:6e:3d",
+            "id": "eth1",
+            "mtu": 1500,
+            "type": "phy",
+        },
+        {
+            "bond_links": ["eth0", "eth1"],
+            "bond_miimon": 100,
+            "bond_mode": "4",
+            "bond_xmit_hash_policy": "layer3+4",
+            "ethernet_mac_address": BOND_MAC,
+            "id": "bond0",
+            "type": "bond",
+        },
+        {
+            "ethernet_mac_address": "fa:16:3e:b3:72:30",
+            "id": "vlan2",
+            "type": "vlan",
+            "vlan_id": 602,
+            "vlan_link": "bond0",
+            "vlan_mac_address": "fa:16:3e:b3:72:30",
+        },
+        {
+            "ethernet_mac_address": "fa:16:3e:66:ab:a6",
+            "id": "vlan3",
+            "type": "vlan",
+            "vlan_id": 612,
+            "vlan_link": "bond0",
+            "vlan_mac_address": "fa:16:3e:66:ab:a6",
+        },
+    ],
 }
 
 NETWORK_DATA_VLAN = {
     "services": [{"type": "dns", "address": "1.1.1.191"}],
     "networks": [
-        {"id": "network1-ipv4", "ip_address": "10.0.1.5",
-         "link": "vlan1", "netmask": "255.255.255.248",
-         "network_id": "a9e2f47c-3c43-4782-94d0-e1eeef1c8c9d",
-         "type": "ipv4",
-         "routes": [{"netmask": "255.255.255.255",
-                    "network": "192.168.1.0", "gateway": "10.0.1.1"}]}
+        {
+            "id": "network1-ipv4",
+            "ip_address": "10.0.1.5",
+            "link": "vlan1",
+            "netmask": "255.255.255.248",
+            "network_id": "a9e2f47c-3c43-4782-94d0-e1eeef1c8c9d",
+            "type": "ipv4",
+            "routes": [
+                {
+                    "netmask": "255.255.255.255",
+                    "network": "192.168.1.0",
+                    "gateway": "10.0.1.1",
+                }
+            ],
+        }
     ],
     "links": [
-        {"ethernet_mac_address": "fa:16:3e:69:b0:58",
-         "id": "eth0", "mtu": 1500, "type": "phy"},
-        {"ethernet_mac_address": "fa:16:3e:b3:72:30",
-         "id": "vlan1", "type": "vlan", "vlan_id": 602,
-         "vlan_link": "eth0", "vlan_mac_address": "fa:16:3e:b3:72:30"},
-    ]
+        {
+            "ethernet_mac_address": "fa:16:3e:69:b0:58",
+            "id": "eth0",
+            "mtu": 1500,
+            "type": "phy",
+        },
+        {
+            "ethernet_mac_address": "fa:16:3e:b3:72:30",
+            "id": "vlan1",
+            "type": "vlan",
+            "vlan_id": 602,
+            "vlan_link": "eth0",
+            "vlan_mac_address": "fa:16:3e:b3:72:30",
+        },
+    ],
 }
 
 KNOWN_MACS = {
-    'fa:16:3e:69:b0:58': 'enp0s1',
-    'fa:16:3e:d4:57:ad': 'enp0s2',
-    'fa:16:3e:dd:50:9a': 'foo1',
-    'fa:16:3e:a8:14:69': 'foo2',
-    'fa:16:3e:ed:9a:59': 'foo3',
-    '0c:c4:7a:34:6e:3d': 'oeth1',
-    '0c:c4:7a:34:6e:3c': 'oeth0',
+    "fa:16:3e:69:b0:58": "enp0s1",
+    "fa:16:3e:d4:57:ad": "enp0s2",
+    "fa:16:3e:dd:50:9a": "foo1",
+    "fa:16:3e:a8:14:69": "foo2",
+    "fa:16:3e:ed:9a:59": "foo3",
+    "0c:c4:7a:34:6e:3d": "oeth1",
+    "0c:c4:7a:34:6e:3c": "oeth0",
 }
 
 CFG_DRIVE_FILES_V2 = {
-    'ec2/2009-04-04/meta-data.json': json.dumps(EC2_META),
-    'ec2/2009-04-04/user-data': USER_DATA,
-    'ec2/latest/meta-data.json': json.dumps(EC2_META),
-    'ec2/latest/user-data': USER_DATA,
-    'openstack/2012-08-10/meta_data.json': json.dumps(OSTACK_META),
-    'openstack/2012-08-10/user_data': USER_DATA,
-    'openstack/content/0000': CONTENT_0,
-    'openstack/content/0001': CONTENT_1,
-    'openstack/latest/meta_data.json': json.dumps(OSTACK_META),
-    'openstack/latest/user_data': USER_DATA,
-    'openstack/latest/network_data.json': json.dumps(NETWORK_DATA),
-    'openstack/2015-10-15/meta_data.json': json.dumps(OSTACK_META),
-    'openstack/2015-10-15/user_data': USER_DATA,
-    'openstack/2015-10-15/network_data.json': json.dumps(NETWORK_DATA)}
+    "ec2/2009-04-04/meta-data.json": json.dumps(EC2_META),
+    "ec2/2009-04-04/user-data": USER_DATA,
+    "ec2/latest/meta-data.json": json.dumps(EC2_META),
+    "ec2/latest/user-data": USER_DATA,
+    "openstack/2012-08-10/meta_data.json": json.dumps(OSTACK_META),
+    "openstack/2012-08-10/user_data": USER_DATA,
+    "openstack/content/0000": CONTENT_0,
+    "openstack/content/0001": CONTENT_1,
+    "openstack/latest/meta_data.json": json.dumps(OSTACK_META),
+    "openstack/latest/user_data": USER_DATA,
+    "openstack/latest/network_data.json": json.dumps(NETWORK_DATA),
+    "openstack/2015-10-15/meta_data.json": json.dumps(OSTACK_META),
+    "openstack/2015-10-15/user_data": USER_DATA,
+    "openstack/2015-10-15/network_data.json": json.dumps(NETWORK_DATA),
+}
 
 M_PATH = "cloudinit.sources.DataSourceConfigDrive."
 
 
 class TestConfigDriveDataSource(CiTestCase):
-
     def setUp(self):
         super(TestConfigDriveDataSource, self).setUp()
         self.add_patch(
-            M_PATH + "util.find_devs_with",
-            "m_find_devs_with", return_value=[])
+            M_PATH + "util.find_devs_with", "m_find_devs_with", return_value=[]
+        )
         self.tmp = self.tmp_dir()
 
     def test_ec2_metadata(self):
         populate_dir(self.tmp, CFG_DRIVE_FILES_V2)
         found = ds.read_config_drive(self.tmp)
-        self.assertTrue('ec2-metadata' in found)
-        ec2_md = found['ec2-metadata']
+        self.assertTrue("ec2-metadata" in found)
+        ec2_md = found["ec2-metadata"]
         self.assertEqual(EC2_META, ec2_md)
 
     def test_dev_os_remap(self):
         populate_dir(self.tmp, CFG_DRIVE_FILES_V2)
-        cfg_ds = ds.DataSourceConfigDrive(settings.CFG_BUILTIN,
-                                          None,
-                                          helpers.Paths({}))
+        cfg_ds = ds.DataSourceConfigDrive(
+            settings.CFG_BUILTIN, None, helpers.Paths({})
+        )
         found = ds.read_config_drive(self.tmp)
-        cfg_ds.metadata = found['metadata']
+        cfg_ds.metadata = found["metadata"]
         name_tests = {
-            'ami': '/dev/vda1',
-            'root': '/dev/vda1',
-            'ephemeral0': '/dev/vda2',
-            'swap': '/dev/vda3',
+            "ami": "/dev/vda1",
+            "root": "/dev/vda1",
+            "ephemeral0": "/dev/vda2",
+            "swap": "/dev/vda3",
         }
         for name, dev_name in name_tests.items():
             with ExitStack() as mocks:
-                provided_name = dev_name[len('/dev/'):]
+                provided_name = dev_name[len("/dev/") :]
                 provided_name = "s" + provided_name[1:]
                 find_mock = mocks.enter_context(
-                    mock.patch.object(util, 'find_devs_with',
-                                      return_value=[provided_name]))
+                    mock.patch.object(
+                        util, "find_devs_with", return_value=[provided_name]
+                    )
+                )
                 # We want os.path.exists() to return False on its first call,
                 # and True on its second call.  We use a handy generator as
                 # the mock side effect for this.  The mocked function returns
@@ -267,9 +417,12 @@ class TestConfigDriveDataSource(CiTestCase):
                 def exists_side_effect():
                     yield False
                     yield True
+
                 exists_mock = mocks.enter_context(
-                    mock.patch.object(os.path, 'exists',
-                                      side_effect=exists_side_effect()))
+                    mock.patch.object(
+                        os.path, "exists", side_effect=exists_side_effect()
+                    )
+                )
                 self.assertEqual(dev_name, cfg_ds.device_name_to_device(name))
 
                 find_mock.assert_called_once_with(mock.ANY)
@@ -277,26 +430,28 @@ class TestConfigDriveDataSource(CiTestCase):
 
     def test_dev_os_map(self):
         populate_dir(self.tmp, CFG_DRIVE_FILES_V2)
-        cfg_ds = ds.DataSourceConfigDrive(settings.CFG_BUILTIN,
-                                          None,
-                                          helpers.Paths({}))
+        cfg_ds = ds.DataSourceConfigDrive(
+            settings.CFG_BUILTIN, None, helpers.Paths({})
+        )
         found = ds.read_config_drive(self.tmp)
-        os_md = found['metadata']
+        os_md = found["metadata"]
         cfg_ds.metadata = os_md
         name_tests = {
-            'ami': '/dev/vda1',
-            'root': '/dev/vda1',
-            'ephemeral0': '/dev/vda2',
-            'swap': '/dev/vda3',
+            "ami": "/dev/vda1",
+            "root": "/dev/vda1",
+            "ephemeral0": "/dev/vda2",
+            "swap": "/dev/vda3",
         }
         for name, dev_name in name_tests.items():
             with ExitStack() as mocks:
                 find_mock = mocks.enter_context(
-                    mock.patch.object(util, 'find_devs_with',
-                                      return_value=[dev_name]))
+                    mock.patch.object(
+                        util, "find_devs_with", return_value=[dev_name]
+                    )
+                )
                 exists_mock = mocks.enter_context(
-                    mock.patch.object(os.path, 'exists',
-                                      return_value=True))
+                    mock.patch.object(os.path, "exists", return_value=True)
+                )
                 self.assertEqual(dev_name, cfg_ds.device_name_to_device(name))
 
                 find_mock.assert_called_once_with(mock.ANY)
@@ -304,22 +459,22 @@ class TestConfigDriveDataSource(CiTestCase):
 
     def test_dev_ec2_remap(self):
         populate_dir(self.tmp, CFG_DRIVE_FILES_V2)
-        cfg_ds = ds.DataSourceConfigDrive(settings.CFG_BUILTIN,
-                                          None,
-                                          helpers.Paths({}))
+        cfg_ds = ds.DataSourceConfigDrive(
+            settings.CFG_BUILTIN, None, helpers.Paths({})
+        )
         found = ds.read_config_drive(self.tmp)
-        ec2_md = found['ec2-metadata']
-        os_md = found['metadata']
+        ec2_md = found["ec2-metadata"]
+        os_md = found["metadata"]
         cfg_ds.ec2_metadata = ec2_md
         cfg_ds.metadata = os_md
         name_tests = {
-            'ami': '/dev/vda1',
-            'root': '/dev/vda1',
-            'ephemeral0': '/dev/vda2',
-            'swap': '/dev/vda3',
+            "ami": "/dev/vda1",
+            "root": "/dev/vda1",
+            "ephemeral0": "/dev/vda2",
+            "swap": "/dev/vda3",
             None: None,
-            'bob': None,
-            'root2k': None,
+            "bob": None,
+            "root2k": None,
         }
         for name, dev_name in name_tests.items():
             # We want os.path.exists() to return False on its first call,
@@ -329,8 +484,10 @@ class TestConfigDriveDataSource(CiTestCase):
             def exists_side_effect():
                 yield False
                 yield True
-            with mock.patch.object(os.path, 'exists',
-                                   side_effect=exists_side_effect()):
+
+            with mock.patch.object(
+                os.path, "exists", side_effect=exists_side_effect()
+            ):
                 self.assertEqual(dev_name, cfg_ds.device_name_to_device(name))
                 # We don't assert the call count for os.path.exists() because
                 # not all of the entries in name_tests results in two calls to
@@ -339,25 +496,25 @@ class TestConfigDriveDataSource(CiTestCase):
 
     def test_dev_ec2_map(self):
         populate_dir(self.tmp, CFG_DRIVE_FILES_V2)
-        cfg_ds = ds.DataSourceConfigDrive(settings.CFG_BUILTIN,
-                                          None,
-                                          helpers.Paths({}))
+        cfg_ds = ds.DataSourceConfigDrive(
+            settings.CFG_BUILTIN, None, helpers.Paths({})
+        )
         found = ds.read_config_drive(self.tmp)
-        ec2_md = found['ec2-metadata']
-        os_md = found['metadata']
+        ec2_md = found["ec2-metadata"]
+        os_md = found["metadata"]
         cfg_ds.ec2_metadata = ec2_md
         cfg_ds.metadata = os_md
         name_tests = {
-            'ami': '/dev/sda1',
-            'root': '/dev/sda1',
-            'ephemeral0': '/dev/sda2',
-            'swap': '/dev/sda3',
+            "ami": "/dev/sda1",
+            "root": "/dev/sda1",
+            "ephemeral0": "/dev/sda2",
+            "swap": "/dev/sda3",
             None: None,
-            'bob': None,
-            'root2k': None,
+            "bob": None,
+            "root2k": None,
         }
         for name, dev_name in name_tests.items():
-            with mock.patch.object(os.path, 'exists', return_value=True):
+            with mock.patch.object(os.path, "exists", return_value=True):
                 self.assertEqual(dev_name, cfg_ds.device_name_to_device(name))
 
     def test_dir_valid(self):
@@ -368,14 +525,14 @@ class TestConfigDriveDataSource(CiTestCase):
         found = ds.read_config_drive(self.tmp)
 
         expected_md = copy(OSTACK_META)
-        expected_md['instance-id'] = expected_md['uuid']
-        expected_md['local-hostname'] = expected_md['hostname']
+        expected_md["instance-id"] = expected_md["uuid"]
+        expected_md["local-hostname"] = expected_md["hostname"]
 
-        self.assertEqual(USER_DATA, found['userdata'])
-        self.assertEqual(expected_md, found['metadata'])
-        self.assertEqual(NETWORK_DATA, found['networkdata'])
-        self.assertEqual(found['files']['/etc/foo.cfg'], CONTENT_0)
-        self.assertEqual(found['files']['/etc/bar/bar.cfg'], CONTENT_1)
+        self.assertEqual(USER_DATA, found["userdata"])
+        self.assertEqual(expected_md, found["metadata"])
+        self.assertEqual(NETWORK_DATA, found["networkdata"])
+        self.assertEqual(found["files"]["/etc/foo.cfg"], CONTENT_0)
+        self.assertEqual(found["files"]["/etc/bar/bar.cfg"], CONTENT_1)
 
     def test_seed_dir_valid_extra(self):
         """Verify extra files do not affect datasource validity."""
@@ -389,10 +546,10 @@ class TestConfigDriveDataSource(CiTestCase):
         found = ds.read_config_drive(self.tmp)
 
         expected_md = copy(OSTACK_META)
-        expected_md['instance-id'] = expected_md['uuid']
-        expected_md['local-hostname'] = expected_md['hostname']
+        expected_md["instance-id"] = expected_md["uuid"]
+        expected_md["local-hostname"] = expected_md["hostname"]
 
-        self.assertEqual(expected_md, found['metadata'])
+        self.assertEqual(expected_md, found["metadata"])
 
     def test_seed_dir_bad_json_metadata(self):
         """Verify that bad json in metadata raises BrokenConfigDriveDir."""
@@ -404,8 +561,9 @@ class TestConfigDriveDataSource(CiTestCase):
 
         populate_dir(self.tmp, data)
 
-        self.assertRaises(openstack.BrokenMetadata,
-                          ds.read_config_drive, self.tmp)
+        self.assertRaises(
+            openstack.BrokenMetadata, ds.read_config_drive, self.tmp
+        )
 
     def test_seed_dir_no_configdrive(self):
         """Verify that no metadata raises NonConfigDriveDir."""
@@ -416,20 +574,18 @@ class TestConfigDriveDataSource(CiTestCase):
         data["openstack/latest/random-file.txt"] = "random-content"
         data["content/foo"] = "foocontent"
 
-        self.assertRaises(openstack.NonReadable,
-                          ds.read_config_drive, my_d)
+        self.assertRaises(openstack.NonReadable, ds.read_config_drive, my_d)
 
     def test_seed_dir_missing(self):
         """Verify that missing seed_dir raises NonConfigDriveDir."""
         my_d = os.path.join(self.tmp, "nonexistantdirectory")
-        self.assertRaises(openstack.NonReadable,
-                          ds.read_config_drive, my_d)
+        self.assertRaises(openstack.NonReadable, ds.read_config_drive, my_d)
 
     def test_find_candidates(self):
         devs_with_answers = {}
 
         def my_devs_with(*args, **kwargs):
-            criteria = args[0] if len(args) else kwargs.pop('criteria', None)
+            criteria = args[0] if len(args) else kwargs.pop("criteria", None)
             return devs_with_answers.get(criteria, [])
 
         def my_is_partition(dev):
@@ -442,60 +598,67 @@ class TestConfigDriveDataSource(CiTestCase):
             orig_is_partition = util.is_partition
             util.is_partition = my_is_partition
 
-            devs_with_answers = {"TYPE=vfat": [],
-                                 "TYPE=iso9660": ["/dev/vdb"],
-                                 "LABEL=config-2": ["/dev/vdb"]}
+            devs_with_answers = {
+                "TYPE=vfat": [],
+                "TYPE=iso9660": ["/dev/vdb"],
+                "LABEL=config-2": ["/dev/vdb"],
+            }
             self.assertEqual(["/dev/vdb"], ds.find_candidate_devs())
 
             # add a vfat item
             # zdd reverse sorts after vdb, but config-2 label is preferred
-            devs_with_answers['TYPE=vfat'] = ["/dev/zdd"]
-            self.assertEqual(["/dev/vdb", "/dev/zdd"],
-                             ds.find_candidate_devs())
+            devs_with_answers["TYPE=vfat"] = ["/dev/zdd"]
+            self.assertEqual(
+                ["/dev/vdb", "/dev/zdd"], ds.find_candidate_devs()
+            )
 
             # verify that partitions are considered, that have correct label.
-            devs_with_answers = {"TYPE=vfat": ["/dev/sda1"],
-                                 "TYPE=iso9660": [],
-                                 "LABEL=config-2": ["/dev/vdb3"]}
-            self.assertEqual(["/dev/vdb3"],
-                             ds.find_candidate_devs())
+            devs_with_answers = {
+                "TYPE=vfat": ["/dev/sda1"],
+                "TYPE=iso9660": [],
+                "LABEL=config-2": ["/dev/vdb3"],
+            }
+            self.assertEqual(["/dev/vdb3"], ds.find_candidate_devs())
 
             # Verify that uppercase labels are also found.
-            devs_with_answers = {"TYPE=vfat": [],
-                                 "TYPE=iso9660": ["/dev/vdb"],
-                                 "LABEL=CONFIG-2": ["/dev/vdb"]}
+            devs_with_answers = {
+                "TYPE=vfat": [],
+                "TYPE=iso9660": ["/dev/vdb"],
+                "LABEL=CONFIG-2": ["/dev/vdb"],
+            }
             self.assertEqual(["/dev/vdb"], ds.find_candidate_devs())
 
         finally:
             util.find_devs_with = orig_find_devs_with
             util.is_partition = orig_is_partition
 
-    @mock.patch(M_PATH + 'on_first_boot')
+    @mock.patch(M_PATH + "on_first_boot")
     def test_pubkeys_v2(self, on_first_boot):
         """Verify that public-keys work in config-drive-v2."""
         myds = cfg_ds_from_dir(self.tmp, files=CFG_DRIVE_FILES_V2)
-        self.assertEqual(myds.get_public_ssh_keys(),
-                         [OSTACK_META['public_keys']['mykey']])
-        self.assertEqual('configdrive', myds.cloud_name)
-        self.assertEqual('openstack', myds.platform)
-        self.assertEqual('seed-dir (%s/seed)' % self.tmp, myds.subplatform)
+        self.assertEqual(
+            myds.get_public_ssh_keys(), [OSTACK_META["public_keys"]["mykey"]]
+        )
+        self.assertEqual("configdrive", myds.cloud_name)
+        self.assertEqual("openstack", myds.platform)
+        self.assertEqual("seed-dir (%s/seed)" % self.tmp, myds.subplatform)
 
     def test_subplatform_config_drive_when_starts_with_dev(self):
         """subplatform reports config-drive when source starts with /dev/."""
-        cfg_ds = ds.DataSourceConfigDrive(settings.CFG_BUILTIN,
-                                          None,
-                                          helpers.Paths({}))
-        with mock.patch(M_PATH + 'find_candidate_devs') as m_find_devs:
-            with mock.patch(M_PATH + 'util.mount_cb'):
-                with mock.patch(M_PATH + 'on_first_boot'):
-                    m_find_devs.return_value = ['/dev/anything']
+        cfg_ds = ds.DataSourceConfigDrive(
+            settings.CFG_BUILTIN, None, helpers.Paths({})
+        )
+        with mock.patch(M_PATH + "find_candidate_devs") as m_find_devs:
+            with mock.patch(M_PATH + "util.mount_cb"):
+                with mock.patch(M_PATH + "on_first_boot"):
+                    m_find_devs.return_value = ["/dev/anything"]
                     self.assertEqual(True, cfg_ds.get_data())
-        self.assertEqual('config-disk (/dev/anything)', cfg_ds.subplatform)
+        self.assertEqual("config-disk (/dev/anything)", cfg_ds.subplatform)
 
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestNetJson(CiTestCase):
     def setUp(self):
@@ -503,55 +666,74 @@ class TestNetJson(CiTestCase):
         self.tmp = self.tmp_dir()
         self.maxDiff = None
 
-    @mock.patch(M_PATH + 'on_first_boot')
+    @mock.patch(M_PATH + "on_first_boot")
     def test_network_data_is_found(self, on_first_boot):
         """Verify that network_data is present in ds in config-drive-v2."""
         myds = cfg_ds_from_dir(self.tmp, files=CFG_DRIVE_FILES_V2)
         self.assertIsNotNone(myds.network_json)
 
-    @mock.patch(M_PATH + 'on_first_boot')
+    @mock.patch(M_PATH + "on_first_boot")
     def test_network_config_is_converted(self, on_first_boot):
         """Verify that network_data is converted and present on ds object."""
         myds = cfg_ds_from_dir(self.tmp, files=CFG_DRIVE_FILES_V2)
-        network_config = openstack.convert_net_json(NETWORK_DATA,
-                                                    known_macs=KNOWN_MACS)
+        network_config = openstack.convert_net_json(
+            NETWORK_DATA, known_macs=KNOWN_MACS
+        )
         self.assertEqual(myds.network_config, network_config)
 
     def test_network_config_conversion_dhcp6(self):
         """Test some ipv6 input network json and check the expected
-           conversions."""
+        conversions."""
         in_data = {
-            'links': [
-                {'vif_id': '2ecc7709-b3f7-4448-9580-e1ec32d75bbd',
-                 'ethernet_mac_address': 'fa:16:3e:69:b0:58',
-                 'type': 'ovs', 'mtu': None, 'id': 'tap2ecc7709-b3'},
-                {'vif_id': '2f88d109-5b57-40e6-af32-2472df09dc33',
-                 'ethernet_mac_address': 'fa:16:3e:d4:57:ad',
-                 'type': 'ovs', 'mtu': None, 'id': 'tap2f88d109-5b'},
+            "links": [
+                {
+                    "vif_id": "2ecc7709-b3f7-4448-9580-e1ec32d75bbd",
+                    "ethernet_mac_address": "fa:16:3e:69:b0:58",
+                    "type": "ovs",
+                    "mtu": None,
+                    "id": "tap2ecc7709-b3",
+                },
+                {
+                    "vif_id": "2f88d109-5b57-40e6-af32-2472df09dc33",
+                    "ethernet_mac_address": "fa:16:3e:d4:57:ad",
+                    "type": "ovs",
+                    "mtu": None,
+                    "id": "tap2f88d109-5b",
+                },
+            ],
+            "networks": [
+                {
+                    "link": "tap2ecc7709-b3",
+                    "type": "ipv6_dhcpv6-stateless",
+                    "network_id": "6d6357ac-0f70-4afa-8bd7-c274cc4ea235",
+                    "id": "network0",
+                },
+                {
+                    "link": "tap2f88d109-5b",
+                    "type": "ipv6_dhcpv6-stateful",
+                    "network_id": "d227a9b3-6960-4d94-8976-ee5788b44f54",
+                    "id": "network1",
+                },
             ],
-            'networks': [
-                {'link': 'tap2ecc7709-b3', 'type': 'ipv6_dhcpv6-stateless',
-                 'network_id': '6d6357ac-0f70-4afa-8bd7-c274cc4ea235',
-                 'id': 'network0'},
-                {'link': 'tap2f88d109-5b', 'type': 'ipv6_dhcpv6-stateful',
-                 'network_id': 'd227a9b3-6960-4d94-8976-ee5788b44f54',
-                 'id': 'network1'},
-            ]
         }
         out_data = {
-            'version': 1,
-            'config': [
-                {'mac_address': 'fa:16:3e:69:b0:58',
-                 'mtu': None,
-                 'name': 'enp0s1',
-                 'subnets': [{'type': 'ipv6_dhcpv6-stateless'}],
-                 'type': 'physical'},
-                {'mac_address': 'fa:16:3e:d4:57:ad',
-                 'mtu': None,
-                 'name': 'enp0s2',
-                 'subnets': [{'type': 'ipv6_dhcpv6-stateful'}],
-                 'type': 'physical',
-                 'accept-ra': True}
+            "version": 1,
+            "config": [
+                {
+                    "mac_address": "fa:16:3e:69:b0:58",
+                    "mtu": None,
+                    "name": "enp0s1",
+                    "subnets": [{"type": "ipv6_dhcpv6-stateless"}],
+                    "type": "physical",
+                },
+                {
+                    "mac_address": "fa:16:3e:d4:57:ad",
+                    "mtu": None,
+                    "name": "enp0s2",
+                    "subnets": [{"type": "ipv6_dhcpv6-stateful"}],
+                    "type": "physical",
+                    "accept-ra": True,
+                },
             ],
         }
         conv_data = openstack.convert_net_json(in_data, known_macs=KNOWN_MACS)
@@ -559,107 +741,115 @@ class TestNetJson(CiTestCase):
 
     def test_network_config_conversions(self):
         """Tests a bunch of input network json and checks the
-           expected conversions."""
+        expected conversions."""
         in_datas = [
             NETWORK_DATA,
             {
-                'services': [{'type': 'dns', 'address': '172.19.0.12'}],
-                'networks': [{
-                    'network_id': 'dacd568d-5be6-4786-91fe-750c374b78b4',
-                    'type': 'ipv4',
-                    'netmask': '255.255.252.0',
-                    'link': 'tap1a81968a-79',
-                    'routes': [{
-                        'netmask': '0.0.0.0',
-                        'network': '0.0.0.0',
-                        'gateway': '172.19.3.254',
-                    }],
-                    'ip_address': '172.19.1.34',
-                    'id': 'network0',
-                }],
-                'links': [{
-                    'type': 'bridge',
-                    'vif_id': '1a81968a-797a-400f-8a80-567f997eb93f',
-                    'ethernet_mac_address': 'fa:16:3e:ed:9a:59',
-                    'id': 'tap1a81968a-79',
-                    'mtu': None,
-                }],
+                "services": [{"type": "dns", "address": "172.19.0.12"}],
+                "networks": [
+                    {
+                        "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
+                        "type": "ipv4",
+                        "netmask": "255.255.252.0",
+                        "link": "tap1a81968a-79",
+                        "routes": [
+                            {
+                                "netmask": "0.0.0.0",
+                                "network": "0.0.0.0",
+                                "gateway": "172.19.3.254",
+                            }
+                        ],
+                        "ip_address": "172.19.1.34",
+                        "id": "network0",
+                    }
+                ],
+                "links": [
+                    {
+                        "type": "bridge",
+                        "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f",
+                        "ethernet_mac_address": "fa:16:3e:ed:9a:59",
+                        "id": "tap1a81968a-79",
+                        "mtu": None,
+                    }
+                ],
             },
         ]
         out_datas = [
             {
-                'version': 1,
-                'config': [
+                "version": 1,
+                "config": [
                     {
-                        'subnets': [{'type': 'dhcp4'}],
-                        'type': 'physical',
-                        'mac_address': 'fa:16:3e:69:b0:58',
-                        'name': 'enp0s1',
-                        'mtu': None,
+                        "subnets": [{"type": "dhcp4"}],
+                        "type": "physical",
+                        "mac_address": "fa:16:3e:69:b0:58",
+                        "name": "enp0s1",
+                        "mtu": None,
                     },
                     {
-                        'subnets': [{'type': 'dhcp4'}],
-                        'type': 'physical',
-                        'mac_address': 'fa:16:3e:d4:57:ad',
-                        'name': 'enp0s2',
-                        'mtu': None,
+                        "subnets": [{"type": "dhcp4"}],
+                        "type": "physical",
+                        "mac_address": "fa:16:3e:d4:57:ad",
+                        "name": "enp0s2",
+                        "mtu": None,
                     },
                     {
-                        'subnets': [{'type': 'dhcp4'}],
-                        'type': 'physical',
-                        'mac_address': 'fa:16:3e:05:30:fe',
-                        'name': 'nic0',
-                        'mtu': None,
+                        "subnets": [{"type": "dhcp4"}],
+                        "type": "physical",
+                        "mac_address": "fa:16:3e:05:30:fe",
+                        "name": "nic0",
+                        "mtu": None,
                     },
                     {
-                        'type': 'nameserver',
-                        'address': '199.204.44.24',
+                        "type": "nameserver",
+                        "address": "199.204.44.24",
                     },
                     {
-                        'type': 'nameserver',
-                        'address': '199.204.47.54',
-                    }
+                        "type": "nameserver",
+                        "address": "199.204.47.54",
+                    },
                 ],
-
             },
             {
-                'version': 1,
-                'config': [
+                "version": 1,
+                "config": [
                     {
-                        'name': 'foo3',
-                        'mac_address': 'fa:16:3e:ed:9a:59',
-                        'mtu': None,
-                        'type': 'physical',
-                        'subnets': [
+                        "name": "foo3",
+                        "mac_address": "fa:16:3e:ed:9a:59",
+                        "mtu": None,
+                        "type": "physical",
+                        "subnets": [
                             {
-                                'address': '172.19.1.34',
-                                'netmask': '255.255.252.0',
-                                'type': 'static',
-                                'ipv4': True,
-                                'routes': [{
-                                    'gateway': '172.19.3.254',
-                                    'netmask': '0.0.0.0',
-                                    'network': '0.0.0.0',
-                                }],
+                                "address": "172.19.1.34",
+                                "netmask": "255.255.252.0",
+                                "type": "static",
+                                "ipv4": True,
+                                "routes": [
+                                    {
+                                        "gateway": "172.19.3.254",
+                                        "netmask": "0.0.0.0",
+                                        "network": "0.0.0.0",
+                                    }
+                                ],
                             }
-                        ]
+                        ],
                     },
                     {
-                        'type': 'nameserver',
-                        'address': '172.19.0.12',
-                    }
+                        "type": "nameserver",
+                        "address": "172.19.0.12",
+                    },
                 ],
             },
         ]
         for in_data, out_data in zip(in_datas, out_datas):
-            conv_data = openstack.convert_net_json(in_data,
-                                                   known_macs=KNOWN_MACS)
+            conv_data = openstack.convert_net_json(
+                in_data, known_macs=KNOWN_MACS
+            )
             self.assertEqual(out_data, conv_data)
 
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestConvertNetworkData(CiTestCase):
 
@@ -670,86 +860,105 @@ class TestConvertNetworkData(CiTestCase):
         self.tmp = self.tmp_dir()
 
     def _getnames_in_config(self, ncfg):
-        return set([n['name'] for n in ncfg['config']
-                    if n['type'] == 'physical'])
+        return set(
+            [n["name"] for n in ncfg["config"] if n["type"] == "physical"]
+        )
 
     def test_conversion_fills_names(self):
         ncfg = openstack.convert_net_json(NETWORK_DATA, known_macs=KNOWN_MACS)
-        expected = set(['nic0', 'enp0s1', 'enp0s2'])
+        expected = set(["nic0", "enp0s1", "enp0s2"])
         found = self._getnames_in_config(ncfg)
         self.assertEqual(found, expected)
 
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_convert_reads_system_prefers_name(self, get_interfaces_by_mac):
         macs = KNOWN_MACS.copy()
-        macs.update({'fa:16:3e:05:30:fe': 'foonic1',
-                     'fa:16:3e:69:b0:58': 'ens1'})
+        macs.update(
+            {"fa:16:3e:05:30:fe": "foonic1", "fa:16:3e:69:b0:58": "ens1"}
+        )
         get_interfaces_by_mac.return_value = macs
 
         ncfg = openstack.convert_net_json(NETWORK_DATA)
-        expected = set(['nic0', 'ens1', 'enp0s2'])
+        expected = set(["nic0", "ens1", "enp0s2"])
         found = self._getnames_in_config(ncfg)
         self.assertEqual(found, expected)
 
     def test_convert_raises_value_error_on_missing_name(self):
-        macs = {'aa:aa:aa:aa:aa:00': 'ens1'}
-        self.assertRaises(ValueError, openstack.convert_net_json,
-                          NETWORK_DATA, known_macs=macs)
+        macs = {"aa:aa:aa:aa:aa:00": "ens1"}
+        self.assertRaises(
+            ValueError,
+            openstack.convert_net_json,
+            NETWORK_DATA,
+            known_macs=macs,
+        )
 
     def test_conversion_with_route(self):
-        ncfg = openstack.convert_net_json(NETWORK_DATA_2,
-                                          known_macs=KNOWN_MACS)
+        ncfg = openstack.convert_net_json(
+            NETWORK_DATA_2, known_macs=KNOWN_MACS
+        )
         # not the best test, but see that we get a route in the
         # network config and that it gets rendered to an ENI file
         routes = []
-        for n in ncfg['config']:
-            for s in n.get('subnets', []):
-                routes.extend(s.get('routes', []))
+        for n in ncfg["config"]:
+            for s in n.get("subnets", []):
+                routes.extend(s.get("routes", []))
         self.assertIn(
-            {'network': '0.0.0.0', 'netmask': '0.0.0.0', 'gateway': '2.2.2.9'},
-            routes)
+            {"network": "0.0.0.0", "netmask": "0.0.0.0", "gateway": "2.2.2.9"},
+            routes,
+        )
         eni_renderer = eni.Renderer()
         eni_renderer.render_network_state(
-            network_state.parse_net_config_data(ncfg), target=self.tmp)
-        with open(os.path.join(self.tmp, "etc",
-                               "network", "interfaces"), 'r') as f:
+            network_state.parse_net_config_data(ncfg), target=self.tmp
+        )
+        with open(
+            os.path.join(self.tmp, "etc", "network", "interfaces"), "r"
+        ) as f:
             eni_rendering = f.read()
             self.assertIn("route add default gw 2.2.2.9", eni_rendering)
 
     def test_conversion_with_tap(self):
-        ncfg = openstack.convert_net_json(NETWORK_DATA_3,
-                                          known_macs=KNOWN_MACS)
+        ncfg = openstack.convert_net_json(
+            NETWORK_DATA_3, known_macs=KNOWN_MACS
+        )
         physicals = set()
-        for i in ncfg['config']:
-            if i.get('type') == "physical":
-                physicals.add(i['name'])
-        self.assertEqual(physicals, set(('foo1', 'foo2')))
+        for i in ncfg["config"]:
+            if i.get("type") == "physical":
+                physicals.add(i["name"])
+        self.assertEqual(physicals, set(("foo1", "foo2")))
 
     def test_bond_conversion(self):
         # light testing of bond conversion and eni rendering of bond
-        ncfg = openstack.convert_net_json(NETWORK_DATA_BOND,
-                                          known_macs=KNOWN_MACS)
+        ncfg = openstack.convert_net_json(
+            NETWORK_DATA_BOND, known_macs=KNOWN_MACS
+        )
         eni_renderer = eni.Renderer()
 
         eni_renderer.render_network_state(
-            network_state.parse_net_config_data(ncfg), target=self.tmp)
-        with open(os.path.join(self.tmp, "etc",
-                               "network", "interfaces"), 'r') as f:
+            network_state.parse_net_config_data(ncfg), target=self.tmp
+        )
+        with open(
+            os.path.join(self.tmp, "etc", "network", "interfaces"), "r"
+        ) as f:
             eni_rendering = f.read()
 
         # Verify there are expected interfaces in the net config.
         interfaces = sorted(
-            [i['name'] for i in ncfg['config']
-             if i['type'] in ('vlan', 'bond', 'physical')])
+            [
+                i["name"]
+                for i in ncfg["config"]
+                if i["type"] in ("vlan", "bond", "physical")
+            ]
+        )
         self.assertEqual(
             sorted(["oeth0", "oeth1", "bond0", "bond0.602", "bond0.612"]),
-            interfaces)
+            interfaces,
+        )
 
         words = eni_rendering.split()
         # 'eth0' and 'eth1' are the ids. because their mac adresses
         # map to other names, we should not see them in the ENI
-        self.assertNotIn('eth0', words)
-        self.assertNotIn('eth1', words)
+        self.assertNotIn("eth0", words)
+        self.assertNotIn("eth1", words)
 
         # oeth0 and oeth1 are the interface names for eni.
         # bond0 will be generated for the bond. Each should be auto.
@@ -762,13 +971,16 @@ class TestConvertNetworkData(CiTestCase):
 
     def test_vlan(self):
         # light testing of vlan config conversion and eni rendering
-        ncfg = openstack.convert_net_json(NETWORK_DATA_VLAN,
-                                          known_macs=KNOWN_MACS)
+        ncfg = openstack.convert_net_json(
+            NETWORK_DATA_VLAN, known_macs=KNOWN_MACS
+        )
         eni_renderer = eni.Renderer()
         eni_renderer.render_network_state(
-            network_state.parse_net_config_data(ncfg), target=self.tmp)
-        with open(os.path.join(self.tmp, "etc",
-                               "network", "interfaces"), 'r') as f:
+            network_state.parse_net_config_data(ncfg), target=self.tmp
+        )
+        with open(
+            os.path.join(self.tmp, "etc", "network", "interfaces"), "r"
+        ) as f:
             eni_rendering = f.read()
 
         self.assertIn("iface enp0s1", eni_rendering)
@@ -778,52 +990,63 @@ class TestConvertNetworkData(CiTestCase):
     def test_mac_addrs_can_be_upper_case(self):
         # input mac addresses on rackspace may be upper case
         my_netdata = deepcopy(NETWORK_DATA)
-        for link in my_netdata['links']:
-            link['ethernet_mac_address'] = link['ethernet_mac_address'].upper()
+        for link in my_netdata["links"]:
+            link["ethernet_mac_address"] = link["ethernet_mac_address"].upper()
 
         ncfg = openstack.convert_net_json(my_netdata, known_macs=KNOWN_MACS)
         config_name2mac = {}
-        for n in ncfg['config']:
-            if n['type'] == 'physical':
-                config_name2mac[n['name']] = n['mac_address']
-
-        expected = {'nic0': 'fa:16:3e:05:30:fe', 'enp0s1': 'fa:16:3e:69:b0:58',
-                    'enp0s2': 'fa:16:3e:d4:57:ad'}
+        for n in ncfg["config"]:
+            if n["type"] == "physical":
+                config_name2mac[n["name"]] = n["mac_address"]
+
+        expected = {
+            "nic0": "fa:16:3e:05:30:fe",
+            "enp0s1": "fa:16:3e:69:b0:58",
+            "enp0s2": "fa:16:3e:d4:57:ad",
+        }
         self.assertEqual(expected, config_name2mac)
 
     def test_unknown_device_types_accepted(self):
         # If we don't recognise a link, we should treat it as physical for a
         # best-effort boot
         my_netdata = deepcopy(NETWORK_DATA)
-        my_netdata['links'][0]['type'] = 'my-special-link-type'
+        my_netdata["links"][0]["type"] = "my-special-link-type"
 
         ncfg = openstack.convert_net_json(my_netdata, known_macs=KNOWN_MACS)
         config_name2mac = {}
-        for n in ncfg['config']:
-            if n['type'] == 'physical':
-                config_name2mac[n['name']] = n['mac_address']
-
-        expected = {'nic0': 'fa:16:3e:05:30:fe', 'enp0s1': 'fa:16:3e:69:b0:58',
-                    'enp0s2': 'fa:16:3e:d4:57:ad'}
+        for n in ncfg["config"]:
+            if n["type"] == "physical":
+                config_name2mac[n["name"]] = n["mac_address"]
+
+        expected = {
+            "nic0": "fa:16:3e:05:30:fe",
+            "enp0s1": "fa:16:3e:69:b0:58",
+            "enp0s2": "fa:16:3e:d4:57:ad",
+        }
         self.assertEqual(expected, config_name2mac)
 
         # We should, however, warn the user that we don't recognise the type
-        self.assertIn('Unknown network_data link type (my-special-link-type)',
-                      self.logs.getvalue())
+        self.assertIn(
+            "Unknown network_data link type (my-special-link-type)",
+            self.logs.getvalue(),
+        )
 
 
 def cfg_ds_from_dir(base_d, files=None):
     run = os.path.join(base_d, "run")
     os.mkdir(run)
     cfg_ds = ds.DataSourceConfigDrive(
-        settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': run}))
+        settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": run})
+    )
     cfg_ds.seed_dir = os.path.join(base_d, "seed")
     if files:
         populate_dir(cfg_ds.seed_dir, files)
     cfg_ds.known_macs = KNOWN_MACS.copy()
     if not cfg_ds.get_data():
-        raise RuntimeError("Data source did not extract itself from"
-                           " seed directory %s" % cfg_ds.seed_dir)
+        raise RuntimeError(
+            "Data source did not extract itself from seed directory %s"
+            % cfg_ds.seed_dir
+        )
     return cfg_ds
 
 
@@ -832,13 +1055,14 @@ def populate_ds_from_read_config(cfg_ds, source, results):
     read_config_drive_dir hopefully in line with what it would have
     if cfg_ds.get_data had been successfully called"""
     cfg_ds.source = source
-    cfg_ds.metadata = results.get('metadata')
-    cfg_ds.ec2_metadata = results.get('ec2-metadata')
-    cfg_ds.userdata_raw = results.get('userdata')
-    cfg_ds.version = results.get('version')
-    cfg_ds.network_json = results.get('networkdata')
+    cfg_ds.metadata = results.get("metadata")
+    cfg_ds.ec2_metadata = results.get("ec2-metadata")
+    cfg_ds.userdata_raw = results.get("userdata")
+    cfg_ds.version = results.get("version")
+    cfg_ds.network_json = results.get("networkdata")
     cfg_ds._network_config = openstack.convert_net_json(
-        cfg_ds.network_json, known_macs=KNOWN_MACS)
+        cfg_ds.network_json, known_macs=KNOWN_MACS
+    )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_digitalocean.py b/tests/unittests/sources/test_digitalocean.py
index 351bf7ba..f3e6224e 100644
--- a/tests/unittests/sources/test_digitalocean.py
+++ b/tests/unittests/sources/test_digitalocean.py
@@ -8,19 +8,20 @@
 
 import json
 
-from cloudinit import helpers
-from cloudinit import settings
+from cloudinit import helpers, settings
 from cloudinit.sources import DataSourceDigitalOcean
 from cloudinit.sources.helpers import digitalocean
+from tests.unittests.helpers import CiTestCase, mock
 
-from tests.unittests.helpers import mock, CiTestCase
-
-DO_MULTIPLE_KEYS = ["ssh-rsa AAAAB3NzaC1yc2EAAAA... test1@do.co",
-                    "ssh-rsa AAAAB3NzaC1yc2EAAAA... test2@do.co"]
+DO_MULTIPLE_KEYS = [
+    "ssh-rsa AAAAB3NzaC1yc2EAAAA... test1@do.co",
+    "ssh-rsa AAAAB3NzaC1yc2EAAAA... test2@do.co",
+]
 DO_SINGLE_KEY = "ssh-rsa AAAAB3NzaC1yc2EAAAA... test@do.co"
 
 # the following JSON was taken from droplet (that's why its a string)
-DO_META = json.loads("""
+DO_META = json.loads(
+    """
 {
   "droplet_id": "22532410",
   "hostname": "utl-96268",
@@ -76,89 +77,94 @@ DO_META = json.loads("""
     ]
   }
 }
-""")
+"""
+)
 
 # This has no private interface
 DO_META_2 = {
     "droplet_id": 27223699,
     "hostname": "smtest1",
-    "vendor_data": "\n".join([
-        ('"Content-Type: multipart/mixed; '
-         'boundary=\"===============8645434374073493512==\"'),
-        'MIME-Version: 1.0',
-        '',
-        '--===============8645434374073493512==',
-        'MIME-Version: 1.0'
-        'Content-Type: text/cloud-config; charset="us-ascii"'
-        'Content-Transfer-Encoding: 7bit'
-        'Content-Disposition: attachment; filename="cloud-config"'
-        '',
-        '#cloud-config',
-        'disable_root: false',
-        'manage_etc_hosts: true',
-        '',
-        '',
-        '--===============8645434374073493512=='
-    ]),
-    "public_keys": [
-        "ssh-rsa AAAAB3NzaN...N3NtHw== smoser@brickies"
-    ],
+    "vendor_data": "\n".join(
+        [
+            '"Content-Type: multipart/mixed; '
+            'boundary="===============8645434374073493512=="',
+            "MIME-Version: 1.0",
+            "",
+            "--===============8645434374073493512==",
+            "MIME-Version: 1.0"
+            'Content-Type: text/cloud-config; charset="us-ascii"'
+            "Content-Transfer-Encoding: 7bit"
+            'Content-Disposition: attachment; filename="cloud-config"'
+            "",
+            "#cloud-config",
+            "disable_root: false",
+            "manage_etc_hosts: true",
+            "",
+            "",
+            "--===============8645434374073493512==",
+        ]
+    ),
+    "public_keys": ["ssh-rsa AAAAB3NzaN...N3NtHw== smoser@brickies"],
     "auth_key": "88888888888888888888888888888888",
     "region": "nyc3",
     "interfaces": {
-        "public": [{
-            "ipv4": {
-                "ip_address": "45.55.249.133",
-                "netmask": "255.255.192.0",
-                "gateway": "45.55.192.1"
-            },
-            "anchor_ipv4": {
-                "ip_address": "10.17.0.5",
-                "netmask": "255.255.0.0",
-                "gateway": "10.17.0.1"
-            },
-            "mac": "ae:cc:08:7c:88:00",
-            "type": "public"
-        }]
+        "public": [
+            {
+                "ipv4": {
+                    "ip_address": "45.55.249.133",
+                    "netmask": "255.255.192.0",
+                    "gateway": "45.55.192.1",
+                },
+                "anchor_ipv4": {
+                    "ip_address": "10.17.0.5",
+                    "netmask": "255.255.0.0",
+                    "gateway": "10.17.0.1",
+                },
+                "mac": "ae:cc:08:7c:88:00",
+                "type": "public",
+            }
+        ]
     },
     "floating_ip": {"ipv4": {"active": True, "ip_address": "138.197.59.92"}},
     "dns": {"nameservers": ["8.8.8.8", "8.8.4.4"]},
     "tags": None,
 }
 
-DO_META['public_keys'] = DO_SINGLE_KEY
+DO_META["public_keys"] = DO_SINGLE_KEY
 
-MD_URL = 'http://169.254.169.254/metadata/v1.json'
+MD_URL = "http://169.254.169.254/metadata/v1.json"
 
 
 def _mock_dmi():
-    return (True, DO_META.get('id'))
+    return (True, DO_META.get("id"))
 
 
 class TestDataSourceDigitalOcean(CiTestCase):
     """
     Test reading the meta-data
     """
+
     def setUp(self):
         super(TestDataSourceDigitalOcean, self).setUp()
         self.tmp = self.tmp_dir()
 
     def get_ds(self, get_sysinfo=_mock_dmi):
         ds = DataSourceDigitalOcean.DataSourceDigitalOcean(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds.use_ip4LL = False
         if get_sysinfo is not None:
             ds._get_sysinfo = get_sysinfo
         return ds
 
-    @mock.patch('cloudinit.sources.helpers.digitalocean.read_sysinfo')
+    @mock.patch("cloudinit.sources.helpers.digitalocean.read_sysinfo")
     def test_returns_false_not_on_docean(self, m_read_sysinfo):
         m_read_sysinfo.return_value = (False, None)
         ds = self.get_ds(get_sysinfo=None)
         self.assertEqual(False, ds.get_data())
         self.assertTrue(m_read_sysinfo.called)
 
-    @mock.patch('cloudinit.sources.helpers.digitalocean.read_metadata')
+    @mock.patch("cloudinit.sources.helpers.digitalocean.read_metadata")
     def test_metadata(self, mock_readmd):
         mock_readmd.return_value = DO_META.copy()
 
@@ -168,22 +174,23 @@ class TestDataSourceDigitalOcean(CiTestCase):
 
         self.assertTrue(mock_readmd.called)
 
-        self.assertEqual(DO_META.get('user_data'), ds.get_userdata_raw())
-        self.assertEqual(DO_META.get('vendor_data'), ds.get_vendordata_raw())
-        self.assertEqual(DO_META.get('region'), ds.availability_zone)
-        self.assertEqual(DO_META.get('droplet_id'), ds.get_instance_id())
-        self.assertEqual(DO_META.get('hostname'), ds.get_hostname())
+        self.assertEqual(DO_META.get("user_data"), ds.get_userdata_raw())
+        self.assertEqual(DO_META.get("vendor_data"), ds.get_vendordata_raw())
+        self.assertEqual(DO_META.get("region"), ds.availability_zone)
+        self.assertEqual(DO_META.get("droplet_id"), ds.get_instance_id())
+        self.assertEqual(DO_META.get("hostname"), ds.get_hostname())
 
         # Single key
-        self.assertEqual([DO_META.get('public_keys')],
-                         ds.get_public_ssh_keys())
+        self.assertEqual(
+            [DO_META.get("public_keys")], ds.get_public_ssh_keys()
+        )
 
         self.assertIsInstance(ds.get_public_ssh_keys(), list)
 
-    @mock.patch('cloudinit.sources.helpers.digitalocean.read_metadata')
+    @mock.patch("cloudinit.sources.helpers.digitalocean.read_metadata")
     def test_multiple_ssh_keys(self, mock_readmd):
         metadata = DO_META.copy()
-        metadata['public_keys'] = DO_MULTIPLE_KEYS
+        metadata["public_keys"] = DO_MULTIPLE_KEYS
         mock_readmd.return_value = metadata.copy()
 
         ds = self.get_ds()
@@ -193,38 +200,39 @@ class TestDataSourceDigitalOcean(CiTestCase):
         self.assertTrue(mock_readmd.called)
 
         # Multiple keys
-        self.assertEqual(metadata['public_keys'], ds.get_public_ssh_keys())
+        self.assertEqual(metadata["public_keys"], ds.get_public_ssh_keys())
         self.assertIsInstance(ds.get_public_ssh_keys(), list)
 
 
 class TestNetworkConvert(CiTestCase):
-
     def _get_networking(self):
         self.m_get_by_mac.return_value = {
-            '04:01:57:d1:9e:01': 'ens1',
-            '04:01:57:d1:9e:02': 'ens2',
-            'b8:ae:ed:75:5f:9a': 'enp0s25',
-            'ae:cc:08:7c:88:00': 'meta2p1'}
+            "04:01:57:d1:9e:01": "ens1",
+            "04:01:57:d1:9e:02": "ens2",
+            "b8:ae:ed:75:5f:9a": "enp0s25",
+            "ae:cc:08:7c:88:00": "meta2p1",
+        }
         netcfg = digitalocean.convert_network_configuration(
-            DO_META['interfaces'], DO_META['dns']['nameservers'])
-        self.assertIn('config', netcfg)
+            DO_META["interfaces"], DO_META["dns"]["nameservers"]
+        )
+        self.assertIn("config", netcfg)
         return netcfg
 
     def setUp(self):
         super(TestNetworkConvert, self).setUp()
-        self.add_patch('cloudinit.net.get_interfaces_by_mac', 'm_get_by_mac')
+        self.add_patch("cloudinit.net.get_interfaces_by_mac", "m_get_by_mac")
 
     def test_networking_defined(self):
         netcfg = self._get_networking()
         self.assertIsNotNone(netcfg)
         dns_defined = False
 
-        for part in netcfg.get('config'):
-            n_type = part.get('type')
+        for part in netcfg.get("config"):
+            n_type = part.get("type")
             print("testing part ", n_type, "\n", json.dumps(part, indent=3))
 
-            if n_type == 'nameserver':
-                n_address = part.get('address')
+            if n_type == "nameserver":
+                n_address = part.get("address")
                 self.assertIsNotNone(n_address)
                 self.assertEqual(len(n_address), 3)
 
@@ -234,9 +242,9 @@ class TestNetworkConvert(CiTestCase):
                 dns_defined = True
 
             else:
-                n_subnets = part.get('type')
-                n_name = part.get('name')
-                n_mac = part.get('mac_address')
+                n_subnets = part.get("type")
+                n_name = part.get("name")
+                n_mac = part.get("mac_address")
 
                 self.assertIsNotNone(n_type)
                 self.assertIsNotNone(n_subnets)
@@ -247,21 +255,21 @@ class TestNetworkConvert(CiTestCase):
 
     def _get_nic_definition(self, int_type, expected_name):
         """helper function to return if_type (i.e. public) and the expected
-           name used by cloud-init (i.e eth0)"""
+        name used by cloud-init (i.e eth0)"""
         netcfg = self._get_networking()
-        meta_def = (DO_META.get('interfaces')).get(int_type)[0]
+        meta_def = (DO_META.get("interfaces")).get(int_type)[0]
 
-        self.assertEqual(int_type, meta_def.get('type'))
+        self.assertEqual(int_type, meta_def.get("type"))
 
-        for nic_def in netcfg.get('config'):
+        for nic_def in netcfg.get("config"):
             print(nic_def)
-            if nic_def.get('name') == expected_name:
+            if nic_def.get("name") == expected_name:
                 return nic_def, meta_def
 
     def _get_match_subn(self, subnets, ip_addr):
         """get the matching subnet definition based on ip address"""
         for subn in subnets:
-            address = subn.get('address')
+            address = subn.get("address")
             self.assertIsNotNone(address)
 
             # equals won't work because of ipv6 addressing being in
@@ -274,99 +282,108 @@ class TestNetworkConvert(CiTestCase):
         """test to make sure the eth0 ipv4 and ipv6 gateways are defined"""
         netcfg = self._get_networking()
         gateways = []
-        for nic_def in netcfg.get('config'):
-            if nic_def.get('type') != 'physical':
+        for nic_def in netcfg.get("config"):
+            if nic_def.get("type") != "physical":
                 continue
-            for subn in nic_def.get('subnets'):
-                if 'gateway' in subn:
-                    gateways.append(subn.get('gateway'))
+            for subn in nic_def.get("subnets"):
+                if "gateway" in subn:
+                    gateways.append(subn.get("gateway"))
 
         # we should have two gateways, one ipv4 and ipv6
         self.assertEqual(len(gateways), 2)
 
         # make that the ipv6 gateway is there
-        (nic_def, meta_def) = self._get_nic_definition('public', 'eth0')
-        ipv4_def = meta_def.get('ipv4')
-        self.assertIn(ipv4_def.get('gateway'), gateways)
+        (nic_def, meta_def) = self._get_nic_definition("public", "eth0")
+        ipv4_def = meta_def.get("ipv4")
+        self.assertIn(ipv4_def.get("gateway"), gateways)
 
         # make sure the the ipv6 gateway is there
-        ipv6_def = meta_def.get('ipv6')
-        self.assertIn(ipv6_def.get('gateway'), gateways)
+        ipv6_def = meta_def.get("ipv6")
+        self.assertIn(ipv6_def.get("gateway"), gateways)
 
     def test_public_interface_defined(self):
         """test that the public interface is defined as eth0"""
-        (nic_def, meta_def) = self._get_nic_definition('public', 'eth0')
-        self.assertEqual('eth0', nic_def.get('name'))
-        self.assertEqual(meta_def.get('mac'), nic_def.get('mac_address'))
-        self.assertEqual('physical', nic_def.get('type'))
+        (nic_def, meta_def) = self._get_nic_definition("public", "eth0")
+        self.assertEqual("eth0", nic_def.get("name"))
+        self.assertEqual(meta_def.get("mac"), nic_def.get("mac_address"))
+        self.assertEqual("physical", nic_def.get("type"))
 
     def test_private_interface_defined(self):
         """test that the private interface is defined as eth1"""
-        (nic_def, meta_def) = self._get_nic_definition('private', 'eth1')
-        self.assertEqual('eth1', nic_def.get('name'))
-        self.assertEqual(meta_def.get('mac'), nic_def.get('mac_address'))
-        self.assertEqual('physical', nic_def.get('type'))
+        (nic_def, meta_def) = self._get_nic_definition("private", "eth1")
+        self.assertEqual("eth1", nic_def.get("name"))
+        self.assertEqual(meta_def.get("mac"), nic_def.get("mac_address"))
+        self.assertEqual("physical", nic_def.get("type"))
 
     def test_public_interface_ipv6(self):
         """test public ipv6 addressing"""
-        (nic_def, meta_def) = self._get_nic_definition('public', 'eth0')
-        ipv6_def = meta_def.get('ipv6')
+        (nic_def, meta_def) = self._get_nic_definition("public", "eth0")
+        ipv6_def = meta_def.get("ipv6")
         self.assertIsNotNone(ipv6_def)
 
-        subn_def = self._get_match_subn(nic_def.get('subnets'),
-                                        ipv6_def.get('ip_address'))
+        subn_def = self._get_match_subn(
+            nic_def.get("subnets"), ipv6_def.get("ip_address")
+        )
 
-        cidr_notated_address = "{0}/{1}".format(ipv6_def.get('ip_address'),
-                                                ipv6_def.get('cidr'))
+        cidr_notated_address = "{0}/{1}".format(
+            ipv6_def.get("ip_address"), ipv6_def.get("cidr")
+        )
 
-        self.assertEqual(cidr_notated_address, subn_def.get('address'))
-        self.assertEqual(ipv6_def.get('gateway'), subn_def.get('gateway'))
+        self.assertEqual(cidr_notated_address, subn_def.get("address"))
+        self.assertEqual(ipv6_def.get("gateway"), subn_def.get("gateway"))
 
     def test_public_interface_ipv4(self):
         """test public ipv4 addressing"""
-        (nic_def, meta_def) = self._get_nic_definition('public', 'eth0')
-        ipv4_def = meta_def.get('ipv4')
+        (nic_def, meta_def) = self._get_nic_definition("public", "eth0")
+        ipv4_def = meta_def.get("ipv4")
         self.assertIsNotNone(ipv4_def)
 
-        subn_def = self._get_match_subn(nic_def.get('subnets'),
-                                        ipv4_def.get('ip_address'))
+        subn_def = self._get_match_subn(
+            nic_def.get("subnets"), ipv4_def.get("ip_address")
+        )
 
-        self.assertEqual(ipv4_def.get('netmask'), subn_def.get('netmask'))
-        self.assertEqual(ipv4_def.get('gateway'), subn_def.get('gateway'))
+        self.assertEqual(ipv4_def.get("netmask"), subn_def.get("netmask"))
+        self.assertEqual(ipv4_def.get("gateway"), subn_def.get("gateway"))
 
     def test_public_interface_anchor_ipv4(self):
         """test public ipv4 addressing"""
-        (nic_def, meta_def) = self._get_nic_definition('public', 'eth0')
-        ipv4_def = meta_def.get('anchor_ipv4')
+        (nic_def, meta_def) = self._get_nic_definition("public", "eth0")
+        ipv4_def = meta_def.get("anchor_ipv4")
         self.assertIsNotNone(ipv4_def)
 
-        subn_def = self._get_match_subn(nic_def.get('subnets'),
-                                        ipv4_def.get('ip_address'))
+        subn_def = self._get_match_subn(
+            nic_def.get("subnets"), ipv4_def.get("ip_address")
+        )
 
-        self.assertEqual(ipv4_def.get('netmask'), subn_def.get('netmask'))
-        self.assertNotIn('gateway', subn_def)
+        self.assertEqual(ipv4_def.get("netmask"), subn_def.get("netmask"))
+        self.assertNotIn("gateway", subn_def)
 
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_convert_without_private(self, m_get_by_mac):
         m_get_by_mac.return_value = {
-            'b8:ae:ed:75:5f:9a': 'enp0s25',
-            'ae:cc:08:7c:88:00': 'meta2p1'}
+            "b8:ae:ed:75:5f:9a": "enp0s25",
+            "ae:cc:08:7c:88:00": "meta2p1",
+        }
         netcfg = digitalocean.convert_network_configuration(
-            DO_META_2['interfaces'], DO_META_2['dns']['nameservers'])
+            DO_META_2["interfaces"], DO_META_2["dns"]["nameservers"]
+        )
 
         # print(netcfg)
         byname = {}
-        for i in netcfg['config']:
-            if 'name' in i:
-                if i['name'] in byname:
-                    raise ValueError("name '%s' in config twice: %s" %
-                                     (i['name'], netcfg))
-                byname[i['name']] = i
-        self.assertTrue('eth0' in byname)
-        self.assertTrue('subnets' in byname['eth0'])
-        eth0 = byname['eth0']
+        for i in netcfg["config"]:
+            if "name" in i:
+                if i["name"] in byname:
+                    raise ValueError(
+                        "name '%s' in config twice: %s" % (i["name"], netcfg)
+                    )
+                byname[i["name"]] = i
+        self.assertTrue("eth0" in byname)
+        self.assertTrue("subnets" in byname["eth0"])
+        eth0 = byname["eth0"]
         self.assertEqual(
-            sorted(['45.55.249.133', '10.17.0.5']),
-            sorted([i['address'] for i in eth0['subnets']]))
+            sorted(["45.55.249.133", "10.17.0.5"]),
+            sorted([i["address"] for i in eth0["subnets"]]),
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_ec2.py b/tests/unittests/sources/test_ec2.py
index 19c2bbcd..b376660d 100644
--- a/tests/unittests/sources/test_ec2.py
+++ b/tests/unittests/sources/test_ec2.py
@@ -1,35 +1,37 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import copy
-import httpretty
 import json
-import requests
 from unittest import mock
 
+import httpretty
+import requests
+
 from cloudinit import helpers
 from cloudinit.sources import DataSourceEc2 as ec2
 from tests.unittests import helpers as test_helpers
 
-
 DYNAMIC_METADATA = {
     "instance-identity": {
-        "document": json.dumps({
-            "devpayProductCodes": None,
-            "marketplaceProductCodes": ["1abc2defghijklm3nopqrs4tu"],
-            "availabilityZone": "us-west-2b",
-            "privateIp": "10.158.112.84",
-            "version": "2017-09-30",
-            "instanceId": "my-identity-id",
-            "billingProducts": None,
-            "instanceType": "t2.micro",
-            "accountId": "123456789012",
-            "imageId": "ami-5fb8c835",
-            "pendingTime": "2016-11-19T16:32:11Z",
-            "architecture": "x86_64",
-            "kernelId": None,
-            "ramdiskId": None,
-            "region": "us-west-2"
-        })
+        "document": json.dumps(
+            {
+                "devpayProductCodes": None,
+                "marketplaceProductCodes": ["1abc2defghijklm3nopqrs4tu"],
+                "availabilityZone": "us-west-2b",
+                "privateIp": "10.158.112.84",
+                "version": "2017-09-30",
+                "instanceId": "my-identity-id",
+                "billingProducts": None,
+                "instanceType": "t2.micro",
+                "accountId": "123456789012",
+                "imageId": "ami-5fb8c835",
+                "pendingTime": "2016-11-19T16:32:11Z",
+                "architecture": "x86_64",
+                "kernelId": None,
+                "ramdiskId": None,
+                "region": "us-west-2",
+            }
+        )
     }
 }
 
@@ -52,7 +54,7 @@ DEFAULT_METADATA = {
     "local-hostname": "ip-172-3-3-15.us-east-2.compute.internal",
     "local-ipv4": "172.3.3.15",
     "mac": "06:17:04:d7:26:09",
-    "metrics": {"vhostmd": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"},
+    "metrics": {"vhostmd": '<?xml version="1.0" encoding="UTF-8"?>'},
     "network": {
         "interfaces": {
             "macs": {
@@ -61,13 +63,15 @@ DEFAULT_METADATA = {
                     "interface-id": "eni-e44ef49e",
                     "ipv4-associations": {"13.59.77.202": "172.3.3.15"},
                     "ipv6s": "2600:1f16:aeb:b20b:9d87:a4af:5cc9:73dc",
-                    "local-hostname": ("ip-172-3-3-15.us-east-2."
-                                       "compute.internal"),
+                    "local-hostname": (
+                        "ip-172-3-3-15.us-east-2.compute.internal"
+                    ),
                     "local-ipv4s": "172.3.3.15",
                     "mac": "06:17:04:d7:26:09",
                     "owner-id": "950047163771",
-                    "public-hostname": ("ec2-13-59-77-202.us-east-2."
-                                        "compute.amazonaws.com"),
+                    "public-hostname": (
+                        "ec2-13-59-77-202.us-east-2.compute.amazonaws.com"
+                    ),
                     "public-ipv4s": "13.59.77.202",
                     "security-group-ids": "sg-5a61d333",
                     "security-groups": "wide-open",
@@ -77,20 +81,22 @@ DEFAULT_METADATA = {
                     "vpc-id": "vpc-87e72bee",
                     "vpc-ipv4-cidr-block": "172.31.0.0/16",
                     "vpc-ipv4-cidr-blocks": "172.31.0.0/16",
-                    "vpc-ipv6-cidr-blocks": "2600:1f16:aeb:b200::/56"
+                    "vpc-ipv6-cidr-blocks": "2600:1f16:aeb:b200::/56",
                 },
                 "06:17:04:d7:26:08": {
-                    "device-number": "1",   # Only IPv4 local config
+                    "device-number": "1",  # Only IPv4 local config
                     "interface-id": "eni-e44ef49f",
                     "ipv4-associations": {"": "172.3.3.16"},
                     "ipv6s": "",  # No IPv6 config
-                    "local-hostname": ("ip-172-3-3-16.us-east-2."
-                                       "compute.internal"),
+                    "local-hostname": (
+                        "ip-172-3-3-16.us-east-2.compute.internal"
+                    ),
                     "local-ipv4s": "172.3.3.16",
                     "mac": "06:17:04:d7:26:08",
                     "owner-id": "950047163771",
-                    "public-hostname": ("ec2-172-3-3-16.us-east-2."
-                                        "compute.amazonaws.com"),
+                    "public-hostname": (
+                        "ec2-172-3-3-16.us-east-2.compute.amazonaws.com"
+                    ),
                     "public-ipv4s": "",  # No public ipv4 config
                     "security-group-ids": "sg-5a61d333",
                     "security-groups": "wide-open",
@@ -100,8 +106,8 @@ DEFAULT_METADATA = {
                     "vpc-id": "vpc-87e72bee",
                     "vpc-ipv4-cidr-block": "172.31.0.0/16",
                     "vpc-ipv4-cidr-blocks": "172.31.0.0/16",
-                    "vpc-ipv6-cidr-blocks": ""
-                }
+                    "vpc-ipv6-cidr-blocks": "",
+                },
             }
         }
     },
@@ -123,24 +129,17 @@ DEFAULT_METADATA = {
 NIC1_MD_IPV4_IPV6_MULTI_IP = {
     "device-number": "0",
     "interface-id": "eni-0d6335689899ce9cc",
-    "ipv4-associations": {
-        "18.218.219.181": "172.31.44.13"
-    },
+    "ipv4-associations": {"18.218.219.181": "172.31.44.13"},
     "ipv6s": [
         "2600:1f16:292:100:c187:593c:4349:136",
         "2600:1f16:292:100:f153:12a3:c37c:11f9",
-        "2600:1f16:292:100:f152:2222:3333:4444"
-    ],
-    "local-hostname": ("ip-172-31-44-13.us-east-2."
-                       "compute.internal"),
-    "local-ipv4s": [
-        "172.31.44.13",
-        "172.31.45.70"
+        "2600:1f16:292:100:f152:2222:3333:4444",
     ],
+    "local-hostname": "ip-172-31-44-13.us-east-2.compute.internal",
+    "local-ipv4s": ["172.31.44.13", "172.31.45.70"],
     "mac": "0a:07:84:3d:6e:38",
     "owner-id": "329910648901",
-    "public-hostname": ("ec2-18-218-219-181.us-east-2."
-                        "compute.amazonaws.com"),
+    "public-hostname": "ec2-18-218-219-181.us-east-2.compute.amazonaws.com",
     "public-ipv4s": "18.218.219.181",
     "security-group-ids": "sg-0c387755222ba8d2e",
     "security-groups": "launch-wizard-4",
@@ -150,7 +149,7 @@ NIC1_MD_IPV4_IPV6_MULTI_IP = {
     "vpc-id": "vpc-a07f62c8",
     "vpc-ipv4-cidr-block": "172.31.0.0/16",
     "vpc-ipv4-cidr-blocks": "172.31.0.0/16",
-    "vpc_ipv6_cidr_blocks": "2600:1f16:292:100::/56"
+    "vpc_ipv6_cidr_blocks": "2600:1f16:292:100::/56",
 }
 
 NIC2_MD = {
@@ -166,30 +165,22 @@ NIC2_MD = {
     "subnet-ipv4-cidr-block": "172.31.32.0/20",
     "vpc-id": "vpc-a07f62c8",
     "vpc-ipv4-cidr-block": "172.31.0.0/16",
-    "vpc-ipv4-cidr-blocks": "172.31.0.0/16"
+    "vpc-ipv4-cidr-blocks": "172.31.0.0/16",
 }
 
 SECONDARY_IP_METADATA_2018_09_24 = {
     "ami-id": "ami-0986c2ac728528ac2",
     "ami-launch-index": "0",
     "ami-manifest-path": "(unknown)",
-    "block-device-mapping": {
-        "ami": "/dev/sda1",
-        "root": "/dev/sda1"
-    },
-    "events": {
-        "maintenance": {
-            "history": "[]",
-            "scheduled": "[]"
-        }
-    },
+    "block-device-mapping": {"ami": "/dev/sda1", "root": "/dev/sda1"},
+    "events": {"maintenance": {"history": "[]", "scheduled": "[]"}},
     "hostname": "ip-172-31-44-13.us-east-2.compute.internal",
     "identity-credentials": {
         "ec2": {
             "info": {
                 "AccountId": "329910648901",
                 "Code": "Success",
-                "LastUpdated": "2019-07-06T14:22:56Z"
+                "LastUpdated": "2019-07-06T14:22:56Z",
             }
         }
     },
@@ -199,9 +190,7 @@ SECONDARY_IP_METADATA_2018_09_24 = {
     "local-hostname": "ip-172-31-44-13.us-east-2.compute.internal",
     "local-ipv4": "172.31.44.13",
     "mac": "0a:07:84:3d:6e:38",
-    "metrics": {
-        "vhostmd": "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
-    },
+    "metrics": {"vhostmd": '<?xml version="1.0" encoding="UTF-8"?>'},
     "network": {
         "interfaces": {
             "macs": {
@@ -209,27 +198,17 @@ SECONDARY_IP_METADATA_2018_09_24 = {
             }
         }
     },
-    "placement": {
-        "availability-zone": "us-east-2c"
-    },
+    "placement": {"availability-zone": "us-east-2c"},
     "profile": "default-hvm",
-    "public-hostname": (
-        "ec2-18-218-219-181.us-east-2.compute.amazonaws.com"),
+    "public-hostname": "ec2-18-218-219-181.us-east-2.compute.amazonaws.com",
     "public-ipv4": "18.218.219.181",
-    "public-keys": {
-        "yourkeyname,e": [
-            "ssh-rsa AAAAW...DZ yourkeyname"
-        ]
-    },
+    "public-keys": {"yourkeyname,e": ["ssh-rsa AAAAW...DZ yourkeyname"]},
     "reservation-id": "r-09b4917135cdd33be",
     "security-groups": "launch-wizard-4",
-    "services": {
-        "domain": "amazonaws.com",
-        "partition": "aws"
-    }
+    "services": {"domain": "amazonaws.com", "partition": "aws"},
 }
 
-M_PATH_NET = 'cloudinit.sources.DataSourceEc2.net.'
+M_PATH_NET = "cloudinit.sources.DataSourceEc2.net."
 
 
 def _register_ssh_keys(rfunc, base_url, keys_data):
@@ -250,9 +229,9 @@ def _register_ssh_keys(rfunc, base_url, keys_data):
     """
 
     base_url = base_url.rstrip("/")
-    odd_index = '\n'.join(
-        ["{0}={1}".format(n, name)
-         for n, name in enumerate(sorted(keys_data))])
+    odd_index = "\n".join(
+        ["{0}={1}".format(n, name) for n, name in enumerate(sorted(keys_data))]
+    )
 
     rfunc(base_url, odd_index)
     rfunc(base_url + "/", odd_index)
@@ -260,7 +239,7 @@ def _register_ssh_keys(rfunc, base_url, keys_data):
     for n, name in enumerate(sorted(keys_data)):
         val = keys_data[name]
         if isinstance(val, list):
-            val = '\n'.join(val)
+            val = "\n".join(val)
         burl = base_url + "/%s" % n
         rfunc(burl, "openssh-key")
         rfunc(burl + "/", "openssh-key")
@@ -281,6 +260,7 @@ def register_mock_metaserver(base_url, data):
        base_url/mac with 00:16:3e:00:00:00
     In the index, references to lists or dictionaries have a trailing /.
     """
+
     def register_helper(register, base_url, body):
         if not isinstance(base_url, str):
             register(base_url, body)
@@ -289,25 +269,24 @@ def register_mock_metaserver(base_url, data):
         if isinstance(body, str):
             register(base_url, body)
         elif isinstance(body, list):
-            register(base_url, '\n'.join(body) + '\n')
-            register(base_url + '/', '\n'.join(body) + '\n')
+            register(base_url, "\n".join(body) + "\n")
+            register(base_url + "/", "\n".join(body) + "\n")
         elif isinstance(body, dict):
             vals = []
             for k, v in body.items():
-                if k == 'public-keys':
-                    _register_ssh_keys(
-                        register, base_url + '/public-keys/', v)
+                if k == "public-keys":
+                    _register_ssh_keys(register, base_url + "/public-keys/", v)
                     continue
                 suffix = k.rstrip("/")
                 if not isinstance(v, (str, list)):
                     suffix += "/"
                 vals.append(suffix)
-                url = base_url + '/' + suffix
+                url = base_url + "/" + suffix
                 register_helper(register, url, v)
-            register(base_url, '\n'.join(vals) + '\n')
-            register(base_url + '/', '\n'.join(vals) + '\n')
+            register(base_url, "\n".join(vals) + "\n")
+            register(base_url + "/", "\n".join(vals) + "\n")
         elif body is None:
-            register(base_url, 'not found', status=404)
+            register(base_url, "not found", status=404)
 
     def myreg(*argc, **kwargs):
         url = argc[0]
@@ -322,9 +301,9 @@ class TestEc2(test_helpers.HttprettyTestCase):
     maxDiff = None
 
     valid_platform_data = {
-        'uuid': 'ec212f79-87d1-2f1d-588f-d86dc0fd5412',
-        'uuid_source': 'dmi',
-        'serial': 'ec212f79-87d1-2f1d-588f-d86dc0fd5412',
+        "uuid": "ec212f79-87d1-2f1d-588f-d86dc0fd5412",
+        "uuid_source": "dmi",
+        "serial": "ec212f79-87d1-2f1d-588f-d86dc0fd5412",
     }
 
     def setUp(self):
@@ -333,9 +312,9 @@ class TestEc2(test_helpers.HttprettyTestCase):
         self.metadata_addr = self.datasource.metadata_urls[0]
         self.tmp = self.tmp_dir()
 
-    def data_url(self, version, data_item='meta-data'):
+    def data_url(self, version, data_item="meta-data"):
         """Return a metadata url based on the version provided."""
-        return '/'.join([self.metadata_addr, version, data_item])
+        return "/".join([self.metadata_addr, version, data_item])
 
     def _patch_add_cleanup(self, mpath, *args, **kwargs):
         p = mock.patch(mpath, *args, **kwargs)
@@ -345,7 +324,7 @@ class TestEc2(test_helpers.HttprettyTestCase):
     def _setup_ds(self, sys_cfg, platform_data, md, md_version=None):
         self.uris = []
         distro = {}
-        paths = helpers.Paths({'run_dir': self.tmp})
+        paths = helpers.Paths({"run_dir": self.tmp})
         if sys_cfg is None:
             sys_cfg = {}
         ds = self.datasource(sys_cfg=sys_cfg, distro=distro, paths=paths)
@@ -354,32 +333,39 @@ class TestEc2(test_helpers.HttprettyTestCase):
         if platform_data is not None:
             self._patch_add_cleanup(
                 "cloudinit.sources.DataSourceEc2._collect_platform_data",
-                return_value=platform_data)
+                return_value=platform_data,
+            )
 
         if md:
-            all_versions = (
-                [ds.min_metadata_version] + ds.extended_metadata_versions)
-            token_url = self.data_url('latest', data_item='api/token')
-            register_mock_metaserver(token_url, 'API-TOKEN')
+            all_versions = [
+                ds.min_metadata_version
+            ] + ds.extended_metadata_versions
+            token_url = self.data_url("latest", data_item="api/token")
+            register_mock_metaserver(token_url, "API-TOKEN")
             for version in all_versions:
-                metadata_url = self.data_url(version) + '/'
+                metadata_url = self.data_url(version) + "/"
                 if version == md_version:
                     # Register all metadata for desired version
                     register_mock_metaserver(
-                        metadata_url, md.get('md', DEFAULT_METADATA))
+                        metadata_url, md.get("md", DEFAULT_METADATA)
+                    )
                     userdata_url = self.data_url(
-                        version, data_item='user-data')
-                    register_mock_metaserver(userdata_url, md.get('ud', ''))
+                        version, data_item="user-data"
+                    )
+                    register_mock_metaserver(userdata_url, md.get("ud", ""))
                     identity_url = self.data_url(
-                        version, data_item='dynamic/instance-identity')
+                        version, data_item="dynamic/instance-identity"
+                    )
                     register_mock_metaserver(
-                        identity_url, md.get('id', DYNAMIC_METADATA))
+                        identity_url, md.get("id", DYNAMIC_METADATA)
+                    )
                 else:
-                    instance_id_url = metadata_url + 'instance-id'
+                    instance_id_url = metadata_url + "instance-id"
                     if version == ds.min_metadata_version:
                         # Add min_metadata_version service availability check
                         register_mock_metaserver(
-                            instance_id_url, DEFAULT_METADATA['instance-id'])
+                            instance_id_url, DEFAULT_METADATA["instance-id"]
+                        )
                     else:
                         # Register 404s for all unrequested extended versions
                         register_mock_metaserver(instance_id_url, None)
@@ -389,24 +375,33 @@ class TestEc2(test_helpers.HttprettyTestCase):
         """network_config property returns network version 2 for metadata"""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': True}}},
-            md={'md': DEFAULT_METADATA})
-        find_fallback_path = M_PATH_NET + 'find_fallback_nic'
+            sys_cfg={"datasource": {"Ec2": {"strict_id": True}}},
+            md={"md": DEFAULT_METADATA},
+        )
+        find_fallback_path = M_PATH_NET + "find_fallback_nic"
         with mock.patch(find_fallback_path) as m_find_fallback:
-            m_find_fallback.return_value = 'eth9'
+            m_find_fallback.return_value = "eth9"
             ds.get_data()
 
-        mac1 = '06:17:04:d7:26:09'  # Defined in DEFAULT_METADATA
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': '06:17:04:d7:26:09'}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': True}}}
-        patch_path = M_PATH_NET + 'get_interfaces_by_mac'
-        get_interface_mac_path = M_PATH_NET + 'get_interface_mac'
+        mac1 = "06:17:04:d7:26:09"  # Defined in DEFAULT_METADATA
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": "06:17:04:d7:26:09"},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": True,
+                }
+            },
+        }
+        patch_path = M_PATH_NET + "get_interfaces_by_mac"
+        get_interface_mac_path = M_PATH_NET + "get_interface_mac"
         with mock.patch(patch_path) as m_get_interfaces_by_mac:
             with mock.patch(find_fallback_path) as m_find_fallback:
                 with mock.patch(get_interface_mac_path) as m_get_mac:
-                    m_get_interfaces_by_mac.return_value = {mac1: 'eth9'}
-                    m_find_fallback.return_value = 'eth9'
+                    m_get_interfaces_by_mac.return_value = {mac1: "eth9"}
+                    m_find_fallback.return_value = "eth9"
                     m_get_mac.return_value = mac1
                     self.assertEqual(expected, ds.network_config)
 
@@ -418,24 +413,33 @@ class TestEc2(test_helpers.HttprettyTestCase):
         """
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': True}}},
-            md={'md': DEFAULT_METADATA})
-        find_fallback_path = M_PATH_NET + 'find_fallback_nic'
+            sys_cfg={"datasource": {"Ec2": {"strict_id": True}}},
+            md={"md": DEFAULT_METADATA},
+        )
+        find_fallback_path = M_PATH_NET + "find_fallback_nic"
         with mock.patch(find_fallback_path) as m_find_fallback:
-            m_find_fallback.return_value = 'eth9'
+            m_find_fallback.return_value = "eth9"
             ds.get_data()
 
-        mac1 = '06:17:04:d7:26:08'  # IPv4 only in DEFAULT_METADATA
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': mac1.lower()}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': False}}}
-        patch_path = M_PATH_NET + 'get_interfaces_by_mac'
-        get_interface_mac_path = M_PATH_NET + 'get_interface_mac'
+        mac1 = "06:17:04:d7:26:08"  # IPv4 only in DEFAULT_METADATA
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": mac1.lower()},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": False,
+                }
+            },
+        }
+        patch_path = M_PATH_NET + "get_interfaces_by_mac"
+        get_interface_mac_path = M_PATH_NET + "get_interface_mac"
         with mock.patch(patch_path) as m_get_interfaces_by_mac:
             with mock.patch(find_fallback_path) as m_find_fallback:
                 with mock.patch(get_interface_mac_path) as m_get_mac:
-                    m_get_interfaces_by_mac.return_value = {mac1: 'eth9'}
-                    m_find_fallback.return_value = 'eth9'
+                    m_get_interfaces_by_mac.return_value = {mac1: "eth9"}
+                    m_find_fallback.return_value = "eth9"
                     m_get_mac.return_value = mac1
                     self.assertEqual(expected, ds.network_config)
 
@@ -447,27 +451,38 @@ class TestEc2(test_helpers.HttprettyTestCase):
         """
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': True}}},
-            md={'md': SECONDARY_IP_METADATA_2018_09_24})
-        find_fallback_path = M_PATH_NET + 'find_fallback_nic'
+            sys_cfg={"datasource": {"Ec2": {"strict_id": True}}},
+            md={"md": SECONDARY_IP_METADATA_2018_09_24},
+        )
+        find_fallback_path = M_PATH_NET + "find_fallback_nic"
         with mock.patch(find_fallback_path) as m_find_fallback:
-            m_find_fallback.return_value = 'eth9'
+            m_find_fallback.return_value = "eth9"
             ds.get_data()
 
-        mac1 = '0a:07:84:3d:6e:38'  # 1 secondary IPv4 and 2 secondary IPv6
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': mac1}, 'set-name': 'eth9',
-            'addresses': ['172.31.45.70/20',
-                          '2600:1f16:292:100:f152:2222:3333:4444/128',
-                          '2600:1f16:292:100:f153:12a3:c37c:11f9/128'],
-            'dhcp4': True, 'dhcp6': True}}}
-        patch_path = M_PATH_NET + 'get_interfaces_by_mac'
-        get_interface_mac_path = M_PATH_NET + 'get_interface_mac'
+        mac1 = "0a:07:84:3d:6e:38"  # 1 secondary IPv4 and 2 secondary IPv6
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": mac1},
+                    "set-name": "eth9",
+                    "addresses": [
+                        "172.31.45.70/20",
+                        "2600:1f16:292:100:f152:2222:3333:4444/128",
+                        "2600:1f16:292:100:f153:12a3:c37c:11f9/128",
+                    ],
+                    "dhcp4": True,
+                    "dhcp6": True,
+                }
+            },
+        }
+        patch_path = M_PATH_NET + "get_interfaces_by_mac"
+        get_interface_mac_path = M_PATH_NET + "get_interface_mac"
         with mock.patch(patch_path) as m_get_interfaces_by_mac:
             with mock.patch(find_fallback_path) as m_find_fallback:
                 with mock.patch(get_interface_mac_path) as m_get_mac:
-                    m_get_interfaces_by_mac.return_value = {mac1: 'eth9'}
-                    m_find_fallback.return_value = 'eth9'
+                    m_get_interfaces_by_mac.return_value = {mac1: "eth9"}
+                    m_find_fallback.return_value = "eth9"
                     m_get_mac.return_value = mac1
                     self.assertEqual(expected, ds.network_config)
 
@@ -475,12 +490,13 @@ class TestEc2(test_helpers.HttprettyTestCase):
         """network_config property is cached in DataSourceEc2."""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': True}}},
-            md={'md': DEFAULT_METADATA})
-        ds._network_config = {'cached': 'data'}
-        self.assertEqual({'cached': 'data'}, ds.network_config)
+            sys_cfg={"datasource": {"Ec2": {"strict_id": True}}},
+            md={"md": DEFAULT_METADATA},
+        )
+        ds._network_config = {"cached": "data"}
+        self.assertEqual({"cached": "data"}, ds.network_config)
 
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_network_config_cached_property_refreshed_on_upgrade(self, m_dhcp):
         """Refresh the network_config Ec2 cache if network key is absent.
 
@@ -488,28 +504,39 @@ class TestEc2(test_helpers.HttprettyTestCase):
         which lacked newly required network key.
         """
         old_metadata = copy.deepcopy(DEFAULT_METADATA)
-        old_metadata.pop('network')
+        old_metadata.pop("network")
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': True}}},
-            md={'md': old_metadata})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": True}}},
+            md={"md": old_metadata},
+        )
         self.assertTrue(ds.get_data())
         # Provide new revision of metadata that contains network data
         register_mock_metaserver(
-            'http://169.254.169.254/2009-04-04/meta-data/', DEFAULT_METADATA)
-        mac1 = '06:17:04:d7:26:09'  # Defined in DEFAULT_METADATA
-        get_interface_mac_path = M_PATH_NET + 'get_interfaces_by_mac'
-        ds.fallback_nic = 'eth9'
+            "http://169.254.169.254/2009-04-04/meta-data/", DEFAULT_METADATA
+        )
+        mac1 = "06:17:04:d7:26:09"  # Defined in DEFAULT_METADATA
+        get_interface_mac_path = M_PATH_NET + "get_interfaces_by_mac"
+        ds.fallback_nic = "eth9"
         with mock.patch(get_interface_mac_path) as m_get_interfaces_by_mac:
-            m_get_interfaces_by_mac.return_value = {mac1: 'eth9'}
+            m_get_interfaces_by_mac.return_value = {mac1: "eth9"}
             nc = ds.network_config  # Will re-crawl network metadata
             self.assertIsNotNone(nc)
         self.assertIn(
-            'Refreshing stale metadata from prior to upgrade',
-            self.logs.getvalue())
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': mac1}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': True}}}
+            "Refreshing stale metadata from prior to upgrade",
+            self.logs.getvalue(),
+        )
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": True,
+                }
+            },
+        }
         self.assertEqual(expected, ds.network_config)
 
     def test_ec2_get_instance_id_refreshes_identity_on_upgrade(self):
@@ -522,40 +549,46 @@ class TestEc2(test_helpers.HttprettyTestCase):
         self.datasource = ec2.DataSourceEc2Local
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
         # Mock 404s on all versions except latest
-        all_versions = (
-            [ds.min_metadata_version] + ds.extended_metadata_versions)
+        all_versions = [
+            ds.min_metadata_version
+        ] + ds.extended_metadata_versions
         for ver in all_versions[:-1]:
             register_mock_metaserver(
-                'http://169.254.169.254/{0}/meta-data/instance-id'.format(ver),
-                None)
-        ds.metadata_address = 'http://169.254.169.254'
+                "http://169.254.169.254/{0}/meta-data/instance-id".format(ver),
+                None,
+            )
+        ds.metadata_address = "http://169.254.169.254"
         register_mock_metaserver(
-            '{0}/{1}/meta-data/'.format(ds.metadata_address, all_versions[-1]),
-            DEFAULT_METADATA)
+            "{0}/{1}/meta-data/".format(ds.metadata_address, all_versions[-1]),
+            DEFAULT_METADATA,
+        )
         # Register dynamic/instance-identity document which we now read.
         register_mock_metaserver(
-            '{0}/{1}/dynamic/'.format(ds.metadata_address, all_versions[-1]),
-            DYNAMIC_METADATA)
+            "{0}/{1}/dynamic/".format(ds.metadata_address, all_versions[-1]),
+            DYNAMIC_METADATA,
+        )
         ds._cloud_name = ec2.CloudNames.AWS
         # Setup cached metadata on the Datasource
         ds.metadata = DEFAULT_METADATA
-        self.assertEqual('my-identity-id', ds.get_instance_id())
+        self.assertEqual("my-identity-id", ds.get_instance_id())
 
     def test_classic_instance_true(self):
         """If no vpc-id in metadata, is_classic_instance must return true."""
         md_copy = copy.deepcopy(DEFAULT_METADATA)
-        ifaces_md = md_copy.get('network', {}).get('interfaces', {})
-        for _mac, mac_data in ifaces_md.get('macs', {}).items():
-            if 'vpc-id' in mac_data:
-                del mac_data['vpc-id']
+        ifaces_md = md_copy.get("network", {}).get("interfaces", {})
+        for _mac, mac_data in ifaces_md.get("macs", {}).items():
+            if "vpc-id" in mac_data:
+                del mac_data["vpc-id"]
 
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': md_copy})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": md_copy},
+        )
         self.assertTrue(ds.get_data())
         self.assertTrue(ds.is_classic_instance())
 
@@ -563,8 +596,9 @@ class TestEc2(test_helpers.HttprettyTestCase):
         """If vpc-id in metadata, is_classic_instance must return false."""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
         self.assertTrue(ds.get_data())
         self.assertFalse(ds.is_classic_instance())
 
@@ -572,108 +606,117 @@ class TestEc2(test_helpers.HttprettyTestCase):
         """Inaccessibility of http://169.254.169.254 are retried."""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md=None)
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md=None,
+        )
 
         conn_error = requests.exceptions.ConnectionError(
-            '[Errno 113] no route to host'
+            "[Errno 113] no route to host"
         )
 
-        mock_success = mock.MagicMock(contents=b'fakesuccess')
+        mock_success = mock.MagicMock(contents=b"fakesuccess")
         mock_success.ok.return_value = True
 
-        with mock.patch('cloudinit.url_helper.readurl') as m_readurl:
+        with mock.patch("cloudinit.url_helper.readurl") as m_readurl:
             m_readurl.side_effect = (conn_error, conn_error, mock_success)
-            with mock.patch('cloudinit.url_helper.time.sleep'):
+            with mock.patch("cloudinit.url_helper.time.sleep"):
                 self.assertTrue(ds.wait_for_metadata_service())
 
         # Just one /latest/api/token request
         self.assertEqual(3, len(m_readurl.call_args_list))
         for readurl_call in m_readurl.call_args_list:
-            self.assertIn('latest/api/token', readurl_call[0][0])
+            self.assertIn("latest/api/token", readurl_call[0][0])
 
     def test_aws_token_403_fails_without_retries(self):
         """Verify that 403s fetching AWS tokens are not retried."""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md=None)
-        token_url = self.data_url('latest', data_item='api/token')
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md=None,
+        )
+        token_url = self.data_url("latest", data_item="api/token")
         httpretty.register_uri(httpretty.PUT, token_url, body={}, status=403)
         self.assertFalse(ds.get_data())
         # Just one /latest/api/token request
         logs = self.logs.getvalue()
         failed_put_log = '"PUT /latest/api/token HTTP/1.1" 403 0'
         expected_logs = [
-            'WARNING: Ec2 IMDS endpoint returned a 403 error. HTTP endpoint is'
-            ' disabled. Aborting.',
+            "WARNING: Ec2 IMDS endpoint returned a 403 error. HTTP endpoint is"
+            " disabled. Aborting.",
             "WARNING: IMDS's HTTP endpoint is probably disabled",
-            failed_put_log
+            failed_put_log,
         ]
         for log in expected_logs:
             self.assertIn(log, logs)
         self.assertEqual(
             1,
-            len([line for line in logs.splitlines() if failed_put_log in line])
+            len(
+                [line for line in logs.splitlines() if failed_put_log in line]
+            ),
         )
 
     def test_aws_token_redacted(self):
         """Verify that aws tokens are redacted when logged."""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
         self.assertTrue(ds.get_data())
         all_logs = self.logs.getvalue().splitlines()
         REDACT_TTL = "'X-aws-ec2-metadata-token-ttl-seconds': 'REDACTED'"
         REDACT_TOK = "'X-aws-ec2-metadata-token': 'REDACTED'"
         logs_with_redacted_ttl = [log for log in all_logs if REDACT_TTL in log]
         logs_with_redacted = [log for log in all_logs if REDACT_TOK in log]
-        logs_with_token = [log for log in all_logs if 'API-TOKEN' in log]
+        logs_with_token = [log for log in all_logs if "API-TOKEN" in log]
         self.assertEqual(1, len(logs_with_redacted_ttl))
         self.assertEqual(81, len(logs_with_redacted))
         self.assertEqual(0, len(logs_with_token))
 
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_valid_platform_with_strict_true(self, m_dhcp):
         """Valid platform data should return true with strict_id true."""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': True}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": True}}},
+            md={"md": DEFAULT_METADATA},
+        )
         ret = ds.get_data()
         self.assertTrue(ret)
         self.assertEqual(0, m_dhcp.call_count)
-        self.assertEqual('aws', ds.cloud_name)
-        self.assertEqual('ec2', ds.platform_type)
-        self.assertEqual('metadata (%s)' % ds.metadata_address, ds.subplatform)
+        self.assertEqual("aws", ds.cloud_name)
+        self.assertEqual("ec2", ds.platform_type)
+        self.assertEqual("metadata (%s)" % ds.metadata_address, ds.subplatform)
 
     def test_valid_platform_with_strict_false(self):
         """Valid platform data should return true with strict_id false."""
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
         ret = ds.get_data()
         self.assertTrue(ret)
 
     def test_unknown_platform_with_strict_true(self):
         """Unknown platform data with strict_id true should return False."""
-        uuid = 'ab439480-72bf-11d3-91fc-b8aded755F9a'
+        uuid = "ab439480-72bf-11d3-91fc-b8aded755F9a"
         ds = self._setup_ds(
-            platform_data={'uuid': uuid, 'uuid_source': 'dmi', 'serial': ''},
-            sys_cfg={'datasource': {'Ec2': {'strict_id': True}}},
-            md={'md': DEFAULT_METADATA})
+            platform_data={"uuid": uuid, "uuid_source": "dmi", "serial": ""},
+            sys_cfg={"datasource": {"Ec2": {"strict_id": True}}},
+            md={"md": DEFAULT_METADATA},
+        )
         ret = ds.get_data()
         self.assertFalse(ret)
 
     def test_unknown_platform_with_strict_false(self):
         """Unknown platform data with strict_id false should return True."""
-        uuid = 'ab439480-72bf-11d3-91fc-b8aded755F9a'
+        uuid = "ab439480-72bf-11d3-91fc-b8aded755F9a"
         ds = self._setup_ds(
-            platform_data={'uuid': uuid, 'uuid_source': 'dmi', 'serial': ''},
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            platform_data={"uuid": uuid, "uuid_source": "dmi", "serial": ""},
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
         ret = ds.get_data()
         self.assertTrue(ret)
 
@@ -682,24 +725,28 @@ class TestEc2(test_helpers.HttprettyTestCase):
         self.datasource = ec2.DataSourceEc2Local
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
         platform_attrs = [
-            attr for attr in ec2.CloudNames.__dict__.keys()
-            if not attr.startswith('__')]
+            attr
+            for attr in ec2.CloudNames.__dict__.keys()
+            if not attr.startswith("__")
+        ]
         for attr_name in platform_attrs:
             platform_name = getattr(ec2.CloudNames, attr_name)
-            if platform_name != 'aws':
+            if platform_name != "aws":
                 ds._cloud_name = platform_name
                 ret = ds.get_data()
-                self.assertEqual('ec2', ds.platform_type)
+                self.assertEqual("ec2", ds.platform_type)
                 self.assertFalse(ret)
                 message = (
                     "Local Ec2 mode only supported on ('aws',),"
-                    ' not {0}'.format(platform_name))
+                    " not {0}".format(platform_name)
+                )
                 self.assertIn(message, self.logs.getvalue())
 
-    @mock.patch('cloudinit.sources.DataSourceEc2.util.is_FreeBSD')
+    @mock.patch("cloudinit.sources.DataSourceEc2.util.is_FreeBSD")
     def test_ec2_local_returns_false_on_bsd(self, m_is_freebsd):
         """DataSourceEc2Local returns False on BSD.
 
@@ -709,20 +756,23 @@ class TestEc2(test_helpers.HttprettyTestCase):
         self.datasource = ec2.DataSourceEc2Local
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
         ret = ds.get_data()
         self.assertFalse(ret)
         self.assertIn(
             "FreeBSD doesn't support running dhclient with -sf",
-            self.logs.getvalue())
-
-    @mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network')
-    @mock.patch('cloudinit.net.find_fallback_nic')
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
-    @mock.patch('cloudinit.sources.DataSourceEc2.util.is_FreeBSD')
-    def test_ec2_local_performs_dhcp_on_non_bsd(self, m_is_bsd, m_dhcp,
-                                                m_fallback_nic, m_net):
+            self.logs.getvalue(),
+        )
+
+    @mock.patch("cloudinit.net.dhcp.EphemeralIPv4Network")
+    @mock.patch("cloudinit.net.find_fallback_nic")
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
+    @mock.patch("cloudinit.sources.DataSourceEc2.util.is_FreeBSD")
+    def test_ec2_local_performs_dhcp_on_non_bsd(
+        self, m_is_bsd, m_dhcp, m_fallback_nic, m_net
+    ):
         """Ec2Local returns True for valid platform data on non-BSD with dhcp.
 
         DataSourceEc2Local will setup initial IPv4 network via dhcp discovery.
@@ -730,31 +780,41 @@ class TestEc2(test_helpers.HttprettyTestCase):
         When the platform data is valid, return True.
         """
 
-        m_fallback_nic.return_value = 'eth9'
+        m_fallback_nic.return_value = "eth9"
         m_is_bsd.return_value = False
-        m_dhcp.return_value = [{
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'broadcast-address': '192.168.2.255'}]
+        m_dhcp.return_value = [
+            {
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+                "broadcast-address": "192.168.2.255",
+            }
+        ]
         self.datasource = ec2.DataSourceEc2Local
         ds = self._setup_ds(
             platform_data=self.valid_platform_data,
-            sys_cfg={'datasource': {'Ec2': {'strict_id': False}}},
-            md={'md': DEFAULT_METADATA})
+            sys_cfg={"datasource": {"Ec2": {"strict_id": False}}},
+            md={"md": DEFAULT_METADATA},
+        )
 
         ret = ds.get_data()
         self.assertTrue(ret)
-        m_dhcp.assert_called_once_with('eth9', None)
+        m_dhcp.assert_called_once_with("eth9", None)
         m_net.assert_called_once_with(
-            broadcast='192.168.2.255', interface='eth9', ip='192.168.2.9',
-            prefix_or_mask='255.255.255.0', router='192.168.2.1',
-            static_routes=None)
-        self.assertIn('Crawl of metadata service took', self.logs.getvalue())
+            broadcast="192.168.2.255",
+            interface="eth9",
+            ip="192.168.2.9",
+            prefix_or_mask="255.255.255.0",
+            router="192.168.2.1",
+            static_routes=None,
+        )
+        self.assertIn("Crawl of metadata service took", self.logs.getvalue())
 
 
 class TestGetSecondaryAddresses(test_helpers.CiTestCase):
 
-    mac = '06:17:04:d7:26:ff'
+    mac = "06:17:04:d7:26:ff"
     with_logs = True
 
     def test_md_with_no_secondary_addresses(self):
@@ -764,26 +824,34 @@ class TestGetSecondaryAddresses(test_helpers.CiTestCase):
     def test_md_with_secondary_v4_and_v6_addresses(self):
         """All secondary addresses are returned from nic metadata"""
         self.assertEqual(
-            ['172.31.45.70/20', '2600:1f16:292:100:f152:2222:3333:4444/128',
-             '2600:1f16:292:100:f153:12a3:c37c:11f9/128'],
-            ec2.get_secondary_addresses(NIC1_MD_IPV4_IPV6_MULTI_IP, self.mac))
+            [
+                "172.31.45.70/20",
+                "2600:1f16:292:100:f152:2222:3333:4444/128",
+                "2600:1f16:292:100:f153:12a3:c37c:11f9/128",
+            ],
+            ec2.get_secondary_addresses(NIC1_MD_IPV4_IPV6_MULTI_IP, self.mac),
+        )
 
     def test_invalid_ipv4_ipv6_cidr_metadata_logged_with_defaults(self):
         """Any invalid subnet-ipv(4|6)-cidr-block values use defaults"""
         invalid_cidr_md = copy.deepcopy(NIC1_MD_IPV4_IPV6_MULTI_IP)
-        invalid_cidr_md['subnet-ipv4-cidr-block'] = "something-unexpected"
-        invalid_cidr_md['subnet-ipv6-cidr-block'] = "not/sure/what/this/is"
+        invalid_cidr_md["subnet-ipv4-cidr-block"] = "something-unexpected"
+        invalid_cidr_md["subnet-ipv6-cidr-block"] = "not/sure/what/this/is"
         self.assertEqual(
-            ['172.31.45.70/24', '2600:1f16:292:100:f152:2222:3333:4444/128',
-             '2600:1f16:292:100:f153:12a3:c37c:11f9/128'],
-            ec2.get_secondary_addresses(invalid_cidr_md, self.mac))
+            [
+                "172.31.45.70/24",
+                "2600:1f16:292:100:f152:2222:3333:4444/128",
+                "2600:1f16:292:100:f153:12a3:c37c:11f9/128",
+            ],
+            ec2.get_secondary_addresses(invalid_cidr_md, self.mac),
+        )
         expected_logs = [
             "WARNING: Could not parse subnet-ipv4-cidr-block"
             " something-unexpected for mac 06:17:04:d7:26:ff."
             " ipv4 network config prefix defaults to /24",
             "WARNING: Could not parse subnet-ipv6-cidr-block"
             " not/sure/what/this/is for mac 06:17:04:d7:26:ff."
-            " ipv6 network config prefix defaults to /128"
+            " ipv6 network config prefix defaults to /128",
         ]
         logs = self.logs.getvalue()
         for log in expected_logs:
@@ -791,188 +859,267 @@ class TestGetSecondaryAddresses(test_helpers.CiTestCase):
 
 
 class TestConvertEc2MetadataNetworkConfig(test_helpers.CiTestCase):
-
     def setUp(self):
         super(TestConvertEc2MetadataNetworkConfig, self).setUp()
-        self.mac1 = '06:17:04:d7:26:09'
+        self.mac1 = "06:17:04:d7:26:09"
         interface_dict = copy.deepcopy(
-            DEFAULT_METADATA['network']['interfaces']['macs'][self.mac1])
+            DEFAULT_METADATA["network"]["interfaces"]["macs"][self.mac1]
+        )
         # These tests are written assuming the base interface doesn't have IPv6
-        interface_dict.pop('ipv6s')
+        interface_dict.pop("ipv6s")
         self.network_metadata = {
-            'interfaces': {'macs': {self.mac1: interface_dict}}}
+            "interfaces": {"macs": {self.mac1: interface_dict}}
+        }
 
     def test_convert_ec2_metadata_network_config_skips_absent_macs(self):
         """Any mac absent from metadata is skipped by network config."""
-        macs_to_nics = {self.mac1: 'eth9', 'DE:AD:BE:EF:FF:FF': 'vitualnic2'}
+        macs_to_nics = {self.mac1: "eth9", "DE:AD:BE:EF:FF:FF": "vitualnic2"}
 
         # DE:AD:BE:EF:FF:FF represented by OS but not in metadata
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': self.mac1}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': False}}}
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": False,
+                }
+            },
+        }
         self.assertEqual(
             expected,
             ec2.convert_ec2_metadata_network_config(
-                self.network_metadata, macs_to_nics))
+                self.network_metadata, macs_to_nics
+            ),
+        )
 
     def test_convert_ec2_metadata_network_config_handles_only_dhcp6(self):
         """Config dhcp6 when ipv6s is in metadata for a mac."""
-        macs_to_nics = {self.mac1: 'eth9'}
+        macs_to_nics = {self.mac1: "eth9"}
         network_metadata_ipv6 = copy.deepcopy(self.network_metadata)
-        nic1_metadata = (
-            network_metadata_ipv6['interfaces']['macs'][self.mac1])
-        nic1_metadata['ipv6s'] = '2620:0:1009:fd00:e442:c88d:c04d:dc85/64'
-        nic1_metadata.pop('public-ipv4s')
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': self.mac1}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': True}}}
+        nic1_metadata = network_metadata_ipv6["interfaces"]["macs"][self.mac1]
+        nic1_metadata["ipv6s"] = "2620:0:1009:fd00:e442:c88d:c04d:dc85/64"
+        nic1_metadata.pop("public-ipv4s")
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": True,
+                }
+            },
+        }
         self.assertEqual(
             expected,
             ec2.convert_ec2_metadata_network_config(
-                network_metadata_ipv6, macs_to_nics))
+                network_metadata_ipv6, macs_to_nics
+            ),
+        )
 
     def test_convert_ec2_metadata_network_config_local_only_dhcp4(self):
         """Config dhcp4 when there are no public addresses in public-ipv4s."""
-        macs_to_nics = {self.mac1: 'eth9'}
+        macs_to_nics = {self.mac1: "eth9"}
         network_metadata_ipv6 = copy.deepcopy(self.network_metadata)
-        nic1_metadata = (
-            network_metadata_ipv6['interfaces']['macs'][self.mac1])
-        nic1_metadata['local-ipv4s'] = '172.3.3.15'
-        nic1_metadata.pop('public-ipv4s')
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': self.mac1}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': False}}}
+        nic1_metadata = network_metadata_ipv6["interfaces"]["macs"][self.mac1]
+        nic1_metadata["local-ipv4s"] = "172.3.3.15"
+        nic1_metadata.pop("public-ipv4s")
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": False,
+                }
+            },
+        }
         self.assertEqual(
             expected,
             ec2.convert_ec2_metadata_network_config(
-                network_metadata_ipv6, macs_to_nics))
+                network_metadata_ipv6, macs_to_nics
+            ),
+        )
 
     def test_convert_ec2_metadata_network_config_handles_absent_dhcp4(self):
         """Config dhcp4 on fallback_nic when there are no ipv4 addresses."""
-        macs_to_nics = {self.mac1: 'eth9'}
+        macs_to_nics = {self.mac1: "eth9"}
         network_metadata_ipv6 = copy.deepcopy(self.network_metadata)
-        nic1_metadata = (
-            network_metadata_ipv6['interfaces']['macs'][self.mac1])
-        nic1_metadata['public-ipv4s'] = ''
+        nic1_metadata = network_metadata_ipv6["interfaces"]["macs"][self.mac1]
+        nic1_metadata["public-ipv4s"] = ""
 
         # When no ipv4 or ipv6 content but fallback_nic set, set dhcp4 config.
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': self.mac1}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': False}}}
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": False,
+                }
+            },
+        }
         self.assertEqual(
             expected,
             ec2.convert_ec2_metadata_network_config(
-                network_metadata_ipv6, macs_to_nics, fallback_nic='eth9'))
+                network_metadata_ipv6, macs_to_nics, fallback_nic="eth9"
+            ),
+        )
 
     def test_convert_ec2_metadata_network_config_handles_local_v4_and_v6(self):
         """When ipv6s and local-ipv4s are non-empty, enable dhcp6 and dhcp4."""
-        macs_to_nics = {self.mac1: 'eth9'}
+        macs_to_nics = {self.mac1: "eth9"}
         network_metadata_both = copy.deepcopy(self.network_metadata)
-        nic1_metadata = (
-            network_metadata_both['interfaces']['macs'][self.mac1])
-        nic1_metadata['ipv6s'] = '2620:0:1009:fd00:e442:c88d:c04d:dc85/64'
-        nic1_metadata.pop('public-ipv4s')
-        nic1_metadata['local-ipv4s'] = '10.0.0.42'  # Local ipv4 only on vpc
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': self.mac1}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': True}}}
+        nic1_metadata = network_metadata_both["interfaces"]["macs"][self.mac1]
+        nic1_metadata["ipv6s"] = "2620:0:1009:fd00:e442:c88d:c04d:dc85/64"
+        nic1_metadata.pop("public-ipv4s")
+        nic1_metadata["local-ipv4s"] = "10.0.0.42"  # Local ipv4 only on vpc
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": True,
+                }
+            },
+        }
         self.assertEqual(
             expected,
             ec2.convert_ec2_metadata_network_config(
-                network_metadata_both, macs_to_nics))
+                network_metadata_both, macs_to_nics
+            ),
+        )
 
     def test_convert_ec2_metadata_network_config_handles_multiple_nics(self):
         """DHCP route-metric increases on secondary NICs for IPv4 and IPv6."""
-        mac2 = '06:17:04:d7:26:08'
-        macs_to_nics = {self.mac1: 'eth9', mac2: 'eth10'}
+        mac2 = "06:17:04:d7:26:08"
+        macs_to_nics = {self.mac1: "eth9", mac2: "eth10"}
         network_metadata_both = copy.deepcopy(self.network_metadata)
         # Add 2nd nic info
-        network_metadata_both['interfaces']['macs'][mac2] = NIC2_MD
-        nic1_metadata = (
-            network_metadata_both['interfaces']['macs'][self.mac1])
-        nic1_metadata['ipv6s'] = '2620:0:1009:fd00:e442:c88d:c04d:dc85/64'
-        nic1_metadata.pop('public-ipv4s')  # No public-ipv4 IPs in cfg
-        nic1_metadata['local-ipv4s'] = '10.0.0.42'  # Local ipv4 only on vpc
-        expected = {'version': 2, 'ethernets': {
-            'eth9': {
-                'match': {'macaddress': self.mac1}, 'set-name': 'eth9',
-                'dhcp4': True, 'dhcp4-overrides': {'route-metric': 100},
-                'dhcp6': True, 'dhcp6-overrides': {'route-metric': 100}},
-            'eth10': {
-                'match': {'macaddress': mac2}, 'set-name': 'eth10',
-                'dhcp4': True, 'dhcp4-overrides': {'route-metric': 200},
-                'dhcp6': False}}}
+        network_metadata_both["interfaces"]["macs"][mac2] = NIC2_MD
+        nic1_metadata = network_metadata_both["interfaces"]["macs"][self.mac1]
+        nic1_metadata["ipv6s"] = "2620:0:1009:fd00:e442:c88d:c04d:dc85/64"
+        nic1_metadata.pop("public-ipv4s")  # No public-ipv4 IPs in cfg
+        nic1_metadata["local-ipv4s"] = "10.0.0.42"  # Local ipv4 only on vpc
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 100},
+                    "dhcp6": True,
+                    "dhcp6-overrides": {"route-metric": 100},
+                },
+                "eth10": {
+                    "match": {"macaddress": mac2},
+                    "set-name": "eth10",
+                    "dhcp4": True,
+                    "dhcp4-overrides": {"route-metric": 200},
+                    "dhcp6": False,
+                },
+            },
+        }
         self.assertEqual(
             expected,
             ec2.convert_ec2_metadata_network_config(
-                network_metadata_both, macs_to_nics))
+                network_metadata_both, macs_to_nics
+            ),
+        )
 
     def test_convert_ec2_metadata_network_config_handles_dhcp4_and_dhcp6(self):
         """Config both dhcp4 and dhcp6 when both vpc-ipv6 and ipv4 exists."""
-        macs_to_nics = {self.mac1: 'eth9'}
+        macs_to_nics = {self.mac1: "eth9"}
         network_metadata_both = copy.deepcopy(self.network_metadata)
-        nic1_metadata = (
-            network_metadata_both['interfaces']['macs'][self.mac1])
-        nic1_metadata['ipv6s'] = '2620:0:1009:fd00:e442:c88d:c04d:dc85/64'
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': self.mac1}, 'set-name': 'eth9',
-            'dhcp4': True, 'dhcp6': True}}}
+        nic1_metadata = network_metadata_both["interfaces"]["macs"][self.mac1]
+        nic1_metadata["ipv6s"] = "2620:0:1009:fd00:e442:c88d:c04d:dc85/64"
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": True,
+                }
+            },
+        }
         self.assertEqual(
             expected,
             ec2.convert_ec2_metadata_network_config(
-                network_metadata_both, macs_to_nics))
+                network_metadata_both, macs_to_nics
+            ),
+        )
 
     def test_convert_ec2_metadata_gets_macs_from_get_interfaces_by_mac(self):
         """Convert Ec2 Metadata calls get_interfaces_by_mac by default."""
-        expected = {'version': 2, 'ethernets': {'eth9': {
-            'match': {'macaddress': self.mac1},
-            'set-name': 'eth9', 'dhcp4': True, 'dhcp6': False}}}
-        patch_path = M_PATH_NET + 'get_interfaces_by_mac'
+        expected = {
+            "version": 2,
+            "ethernets": {
+                "eth9": {
+                    "match": {"macaddress": self.mac1},
+                    "set-name": "eth9",
+                    "dhcp4": True,
+                    "dhcp6": False,
+                }
+            },
+        }
+        patch_path = M_PATH_NET + "get_interfaces_by_mac"
         with mock.patch(patch_path) as m_get_interfaces_by_mac:
-            m_get_interfaces_by_mac.return_value = {self.mac1: 'eth9'}
+            m_get_interfaces_by_mac.return_value = {self.mac1: "eth9"}
             self.assertEqual(
                 expected,
-                ec2.convert_ec2_metadata_network_config(self.network_metadata))
+                ec2.convert_ec2_metadata_network_config(self.network_metadata),
+            )
 
 
 class TesIdentifyPlatform(test_helpers.CiTestCase):
-
     def collmock(self, **kwargs):
         """return non-special _collect_platform_data updated with changes."""
         unspecial = {
-            'asset_tag': '3857-0037-2746-7462-1818-3997-77',
-            'serial': 'H23-C4J3JV-R6',
-            'uuid': '81c7e555-6471-4833-9551-1ab366c4cfd2',
-            'uuid_source': 'dmi',
-            'vendor': 'tothecloud',
+            "asset_tag": "3857-0037-2746-7462-1818-3997-77",
+            "serial": "H23-C4J3JV-R6",
+            "uuid": "81c7e555-6471-4833-9551-1ab366c4cfd2",
+            "uuid_source": "dmi",
+            "vendor": "tothecloud",
         }
         unspecial.update(**kwargs)
         return unspecial
 
-    @mock.patch('cloudinit.sources.DataSourceEc2._collect_platform_data')
+    @mock.patch("cloudinit.sources.DataSourceEc2._collect_platform_data")
     def test_identify_zstack(self, m_collect):
-        """zstack should be identified if chassis-asset-tag ends in .zstack.io
+        """zstack should be identified if chassis-asset-tag
+        ends in .zstack.io
         """
-        m_collect.return_value = self.collmock(asset_tag='123456.zstack.io')
+        m_collect.return_value = self.collmock(asset_tag="123456.zstack.io")
         self.assertEqual(ec2.CloudNames.ZSTACK, ec2.identify_platform())
 
-    @mock.patch('cloudinit.sources.DataSourceEc2._collect_platform_data')
+    @mock.patch("cloudinit.sources.DataSourceEc2._collect_platform_data")
     def test_identify_zstack_full_domain_only(self, m_collect):
-        """zstack asset-tag matching should match only on full domain boundary.
+        """zstack asset-tag matching should match only on
+        full domain boundary.
         """
-        m_collect.return_value = self.collmock(asset_tag='123456.buzzstack.io')
+        m_collect.return_value = self.collmock(asset_tag="123456.buzzstack.io")
         self.assertEqual(ec2.CloudNames.UNKNOWN, ec2.identify_platform())
 
-    @mock.patch('cloudinit.sources.DataSourceEc2._collect_platform_data')
+    @mock.patch("cloudinit.sources.DataSourceEc2._collect_platform_data")
     def test_identify_e24cloud(self, m_collect):
         """e24cloud identified if vendor is e24cloud"""
-        m_collect.return_value = self.collmock(vendor='e24cloud')
+        m_collect.return_value = self.collmock(vendor="e24cloud")
         self.assertEqual(ec2.CloudNames.E24CLOUD, ec2.identify_platform())
 
-    @mock.patch('cloudinit.sources.DataSourceEc2._collect_platform_data')
+    @mock.patch("cloudinit.sources.DataSourceEc2._collect_platform_data")
     def test_identify_e24cloud_negative(self, m_collect):
         """e24cloud identified if vendor is e24cloud"""
-        m_collect.return_value = self.collmock(vendor='e24cloudyday')
+        m_collect.return_value = self.collmock(vendor="e24cloudyday")
         self.assertEqual(ec2.CloudNames.UNKNOWN, ec2.identify_platform())
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_exoscale.py b/tests/unittests/sources/test_exoscale.py
index b0ffb7a5..591256d8 100644
--- a/tests/unittests/sources/test_exoscale.py
+++ b/tests/unittests/sources/test_exoscale.py
@@ -2,36 +2,33 @@
 # Author: Christopher Glass <christopher.glass@exoscale.com>
 #
 # This file is part of cloud-init. See LICENSE file for license information.
-from cloudinit import helpers
+import os
+
+import httpretty
+import requests
+
+from cloudinit import helpers, util
 from cloudinit.sources.DataSourceExoscale import (
     API_VERSION,
-    DataSourceExoscale,
     METADATA_URL,
-    get_password,
     PASSWORD_SERVER_PORT,
-    read_metadata)
+    DataSourceExoscale,
+    get_password,
+    read_metadata,
+)
 from tests.unittests.helpers import HttprettyTestCase, mock
-from cloudinit import util
 
-import httpretty
-import os
-import requests
+TEST_PASSWORD_URL = "{}:{}/{}/".format(
+    METADATA_URL, PASSWORD_SERVER_PORT, API_VERSION
+)
 
+TEST_METADATA_URL = "{}/{}/meta-data/".format(METADATA_URL, API_VERSION)
 
-TEST_PASSWORD_URL = "{}:{}/{}/".format(METADATA_URL,
-                                       PASSWORD_SERVER_PORT,
-                                       API_VERSION)
-
-TEST_METADATA_URL = "{}/{}/meta-data/".format(METADATA_URL,
-                                              API_VERSION)
-
-TEST_USERDATA_URL = "{}/{}/user-data".format(METADATA_URL,
-                                             API_VERSION)
+TEST_USERDATA_URL = "{}/{}/user-data".format(METADATA_URL, API_VERSION)
 
 
 @httpretty.activate
 class TestDatasourceExoscale(HttprettyTestCase):
-
     def setUp(self):
         super(TestDatasourceExoscale, self).setUp()
         self.tmp = self.tmp_dir()
@@ -42,37 +39,35 @@ class TestDatasourceExoscale(HttprettyTestCase):
     def test_password_saved(self):
         """The password is not set when it is not found
         in the metadata service."""
-        httpretty.register_uri(httpretty.GET,
-                               self.password_url,
-                               body="saved_password")
+        httpretty.register_uri(
+            httpretty.GET, self.password_url, body="saved_password"
+        )
         self.assertFalse(get_password())
 
     def test_password_empty(self):
         """No password is set if the metadata service returns
         an empty string."""
-        httpretty.register_uri(httpretty.GET,
-                               self.password_url,
-                               body="")
+        httpretty.register_uri(httpretty.GET, self.password_url, body="")
         self.assertFalse(get_password())
 
     def test_password(self):
         """The password is set to what is found in the metadata
         service."""
         expected_password = "p@ssw0rd"
-        httpretty.register_uri(httpretty.GET,
-                               self.password_url,
-                               body=expected_password)
+        httpretty.register_uri(
+            httpretty.GET, self.password_url, body=expected_password
+        )
         password = get_password()
         self.assertEqual(expected_password, password)
 
     def test_activate_removes_set_passwords_semaphore(self):
         """Allow set_passwords to run every boot by removing the semaphore."""
-        path = helpers.Paths({'cloud_dir': self.tmp})
-        sem_dir = self.tmp_path('instance/sem', dir=self.tmp)
+        path = helpers.Paths({"cloud_dir": self.tmp})
+        sem_dir = self.tmp_path("instance/sem", dir=self.tmp)
         util.ensure_dir(sem_dir)
-        sem_file = os.path.join(sem_dir, 'config_set_passwords')
-        with open(sem_file, 'w') as stream:
-            stream.write('')
+        sem_file = os.path.join(sem_dir, "config_set_passwords")
+        with open(sem_file, "w") as stream:
+            stream.write("")
         ds = DataSourceExoscale({}, None, path)
         ds.activate(None, None)
         self.assertFalse(os.path.exists(sem_file))
@@ -80,102 +75,130 @@ class TestDatasourceExoscale(HttprettyTestCase):
     def test_get_data(self):
         """The datasource conforms to expected behavior when supplied
         full test data."""
-        path = helpers.Paths({'run_dir': self.tmp})
+        path = helpers.Paths({"run_dir": self.tmp})
         ds = DataSourceExoscale({}, None, path)
         ds._is_platform_viable = lambda: True
         expected_password = "p@ssw0rd"
         expected_id = "12345"
         expected_hostname = "myname"
         expected_userdata = "#cloud-config"
-        httpretty.register_uri(httpretty.GET,
-                               self.userdata_url,
-                               body=expected_userdata)
-        httpretty.register_uri(httpretty.GET,
-                               self.password_url,
-                               body=expected_password)
-        httpretty.register_uri(httpretty.GET,
-                               self.metadata_url,
-                               body="instance-id\nlocal-hostname")
-        httpretty.register_uri(httpretty.GET,
-                               "{}local-hostname".format(self.metadata_url),
-                               body=expected_hostname)
-        httpretty.register_uri(httpretty.GET,
-                               "{}instance-id".format(self.metadata_url),
-                               body=expected_id)
+        httpretty.register_uri(
+            httpretty.GET, self.userdata_url, body=expected_userdata
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.password_url, body=expected_password
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            self.metadata_url,
+            body="instance-id\nlocal-hostname",
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}local-hostname".format(self.metadata_url),
+            body=expected_hostname,
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}instance-id".format(self.metadata_url),
+            body=expected_id,
+        )
         self.assertTrue(ds._get_data())
         self.assertEqual(ds.userdata_raw.decode("utf-8"), "#cloud-config")
-        self.assertEqual(ds.metadata, {"instance-id": expected_id,
-                                       "local-hostname": expected_hostname})
-        self.assertEqual(ds.get_config_obj(),
-                         {'ssh_pwauth': True,
-                          'password': expected_password,
-                          'chpasswd': {
-                              'expire': False,
-                          }})
+        self.assertEqual(
+            ds.metadata,
+            {"instance-id": expected_id, "local-hostname": expected_hostname},
+        )
+        self.assertEqual(
+            ds.get_config_obj(),
+            {
+                "ssh_pwauth": True,
+                "password": expected_password,
+                "chpasswd": {
+                    "expire": False,
+                },
+            },
+        )
 
     def test_get_data_saved_password(self):
         """The datasource conforms to expected behavior when saved_password is
         returned by the password server."""
-        path = helpers.Paths({'run_dir': self.tmp})
+        path = helpers.Paths({"run_dir": self.tmp})
         ds = DataSourceExoscale({}, None, path)
         ds._is_platform_viable = lambda: True
         expected_answer = "saved_password"
         expected_id = "12345"
         expected_hostname = "myname"
         expected_userdata = "#cloud-config"
-        httpretty.register_uri(httpretty.GET,
-                               self.userdata_url,
-                               body=expected_userdata)
-        httpretty.register_uri(httpretty.GET,
-                               self.password_url,
-                               body=expected_answer)
-        httpretty.register_uri(httpretty.GET,
-                               self.metadata_url,
-                               body="instance-id\nlocal-hostname")
-        httpretty.register_uri(httpretty.GET,
-                               "{}local-hostname".format(self.metadata_url),
-                               body=expected_hostname)
-        httpretty.register_uri(httpretty.GET,
-                               "{}instance-id".format(self.metadata_url),
-                               body=expected_id)
+        httpretty.register_uri(
+            httpretty.GET, self.userdata_url, body=expected_userdata
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.password_url, body=expected_answer
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            self.metadata_url,
+            body="instance-id\nlocal-hostname",
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}local-hostname".format(self.metadata_url),
+            body=expected_hostname,
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}instance-id".format(self.metadata_url),
+            body=expected_id,
+        )
         self.assertTrue(ds._get_data())
         self.assertEqual(ds.userdata_raw.decode("utf-8"), "#cloud-config")
-        self.assertEqual(ds.metadata, {"instance-id": expected_id,
-                                       "local-hostname": expected_hostname})
+        self.assertEqual(
+            ds.metadata,
+            {"instance-id": expected_id, "local-hostname": expected_hostname},
+        )
         self.assertEqual(ds.get_config_obj(), {})
 
     def test_get_data_no_password(self):
         """The datasource conforms to expected behavior when no password is
         returned by the password server."""
-        path = helpers.Paths({'run_dir': self.tmp})
+        path = helpers.Paths({"run_dir": self.tmp})
         ds = DataSourceExoscale({}, None, path)
         ds._is_platform_viable = lambda: True
         expected_answer = ""
         expected_id = "12345"
         expected_hostname = "myname"
         expected_userdata = "#cloud-config"
-        httpretty.register_uri(httpretty.GET,
-                               self.userdata_url,
-                               body=expected_userdata)
-        httpretty.register_uri(httpretty.GET,
-                               self.password_url,
-                               body=expected_answer)
-        httpretty.register_uri(httpretty.GET,
-                               self.metadata_url,
-                               body="instance-id\nlocal-hostname")
-        httpretty.register_uri(httpretty.GET,
-                               "{}local-hostname".format(self.metadata_url),
-                               body=expected_hostname)
-        httpretty.register_uri(httpretty.GET,
-                               "{}instance-id".format(self.metadata_url),
-                               body=expected_id)
+        httpretty.register_uri(
+            httpretty.GET, self.userdata_url, body=expected_userdata
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.password_url, body=expected_answer
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            self.metadata_url,
+            body="instance-id\nlocal-hostname",
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}local-hostname".format(self.metadata_url),
+            body=expected_hostname,
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}instance-id".format(self.metadata_url),
+            body=expected_id,
+        )
         self.assertTrue(ds._get_data())
         self.assertEqual(ds.userdata_raw.decode("utf-8"), "#cloud-config")
-        self.assertEqual(ds.metadata, {"instance-id": expected_id,
-                                       "local-hostname": expected_hostname})
+        self.assertEqual(
+            ds.metadata,
+            {"instance-id": expected_id, "local-hostname": expected_hostname},
+        )
         self.assertEqual(ds.get_config_obj(), {})
 
-    @mock.patch('cloudinit.sources.DataSourceExoscale.get_password')
+    @mock.patch("cloudinit.sources.DataSourceExoscale.get_password")
     def test_read_metadata_when_password_server_unreachable(self, m_password):
         """The read_metadata function returns partial results in case the
         password server (only) is unreachable."""
@@ -183,29 +206,36 @@ class TestDatasourceExoscale(HttprettyTestCase):
         expected_hostname = "myname"
         expected_userdata = "#cloud-config"
 
-        m_password.side_effect = requests.Timeout('Fake Connection Timeout')
-        httpretty.register_uri(httpretty.GET,
-                               self.userdata_url,
-                               body=expected_userdata)
-        httpretty.register_uri(httpretty.GET,
-                               self.metadata_url,
-                               body="instance-id\nlocal-hostname")
-        httpretty.register_uri(httpretty.GET,
-                               "{}local-hostname".format(self.metadata_url),
-                               body=expected_hostname)
-        httpretty.register_uri(httpretty.GET,
-                               "{}instance-id".format(self.metadata_url),
-                               body=expected_id)
+        m_password.side_effect = requests.Timeout("Fake Connection Timeout")
+        httpretty.register_uri(
+            httpretty.GET, self.userdata_url, body=expected_userdata
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            self.metadata_url,
+            body="instance-id\nlocal-hostname",
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}local-hostname".format(self.metadata_url),
+            body=expected_hostname,
+        )
+        httpretty.register_uri(
+            httpretty.GET,
+            "{}instance-id".format(self.metadata_url),
+            body=expected_id,
+        )
 
         result = read_metadata()
 
         self.assertIsNone(result.get("password"))
-        self.assertEqual(result.get("user-data").decode("utf-8"),
-                         expected_userdata)
+        self.assertEqual(
+            result.get("user-data").decode("utf-8"), expected_userdata
+        )
 
     def test_non_viable_platform(self):
         """The datasource fails fast when the platform is not viable."""
-        path = helpers.Paths({'run_dir': self.tmp})
+        path = helpers.Paths({"run_dir": self.tmp})
         ds = DataSourceExoscale({}, None, path)
         ds._is_platform_viable = lambda: False
         self.assertFalse(ds._get_data())
diff --git a/tests/unittests/sources/test_gce.py b/tests/unittests/sources/test_gce.py
index dc768e99..e030931b 100644
--- a/tests/unittests/sources/test_gce.py
+++ b/tests/unittests/sources/test_gce.py
@@ -5,58 +5,57 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import datetime
-import httpretty
 import json
 import re
+from base64 import b64decode, b64encode
 from unittest import mock
 from urllib.parse import urlparse
 
-from base64 import b64encode, b64decode
+import httpretty
 
-from cloudinit import distros
-from cloudinit import helpers
-from cloudinit import settings
+from cloudinit import distros, helpers, settings
 from cloudinit.sources import DataSourceGCE
-
 from tests.unittests import helpers as test_helpers
 
-
 GCE_META = {
-    'instance/id': '123',
-    'instance/zone': 'foo/bar',
-    'instance/hostname': 'server.project-foo.local',
+    "instance/id": "123",
+    "instance/zone": "foo/bar",
+    "instance/hostname": "server.project-foo.local",
 }
 
 GCE_META_PARTIAL = {
-    'instance/id': '1234',
-    'instance/hostname': 'server.project-bar.local',
-    'instance/zone': 'bar/baz',
+    "instance/id": "1234",
+    "instance/hostname": "server.project-bar.local",
+    "instance/zone": "bar/baz",
 }
 
 GCE_META_ENCODING = {
-    'instance/id': '12345',
-    'instance/hostname': 'server.project-baz.local',
-    'instance/zone': 'baz/bang',
-    'instance/attributes': {
-        'user-data': b64encode(b'#!/bin/echo baz\n').decode('utf-8'),
-        'user-data-encoding': 'base64',
-    }
+    "instance/id": "12345",
+    "instance/hostname": "server.project-baz.local",
+    "instance/zone": "baz/bang",
+    "instance/attributes": {
+        "user-data": b64encode(b"#!/bin/echo baz\n").decode("utf-8"),
+        "user-data-encoding": "base64",
+    },
 }
 
 GCE_USER_DATA_TEXT = {
-    'instance/id': '12345',
-    'instance/hostname': 'server.project-baz.local',
-    'instance/zone': 'baz/bang',
-    'instance/attributes': {
-        'user-data': '#!/bin/sh\necho hi mom\ntouch /run/up-now\n',
-    }
+    "instance/id": "12345",
+    "instance/hostname": "server.project-baz.local",
+    "instance/zone": "baz/bang",
+    "instance/attributes": {
+        "user-data": "#!/bin/sh\necho hi mom\ntouch /run/up-now\n",
+    },
 }
 
-HEADERS = {'Metadata-Flavor': 'Google'}
+HEADERS = {"Metadata-Flavor": "Google"}
 MD_URL_RE = re.compile(
-    r'http://metadata.google.internal/computeMetadata/v1/.*')
-GUEST_ATTRIBUTES_URL = ('http://metadata.google.internal/computeMetadata/'
-                        'v1/instance/guest-attributes/hostkeys/')
+    r"http://metadata.google.internal/computeMetadata/v1/.*"
+)
+GUEST_ATTRIBUTES_URL = (
+    "http://metadata.google.internal/computeMetadata/"
+    "v1/instance/guest-attributes/hostkeys/"
+)
 
 
 def _set_mock_metadata(gce_meta=None):
@@ -65,10 +64,10 @@ def _set_mock_metadata(gce_meta=None):
 
     def _request_callback(method, uri, headers):
         url_path = urlparse(uri).path
-        if url_path.startswith('/computeMetadata/v1/'):
-            path = url_path.split('/computeMetadata/v1/')[1:][0]
-            recursive = path.endswith('/')
-            path = path.rstrip('/')
+        if url_path.startswith("/computeMetadata/v1/"):
+            path = url_path.split("/computeMetadata/v1/")[1:][0]
+            recursive = path.endswith("/")
+            path = path.rstrip("/")
         else:
             path = None
         if path in gce_meta:
@@ -77,7 +76,7 @@ def _set_mock_metadata(gce_meta=None):
                 response = json.dumps(response)
             return (200, headers, response)
         else:
-            return (404, headers, '')
+            return (404, headers, "")
 
     # reset is needed. https://github.com/gabrielfalcao/HTTPretty/issues/316
     httpretty.register_uri(httpretty.GET, MD_URL_RE, body=_request_callback)
@@ -85,28 +84,28 @@ def _set_mock_metadata(gce_meta=None):
 
 @httpretty.activate
 class TestDataSourceGCE(test_helpers.HttprettyTestCase):
-
     def _make_distro(self, dtype, def_user=None):
         cfg = dict(settings.CFG_BUILTIN)
-        cfg['system_info']['distro'] = dtype
-        paths = helpers.Paths(cfg['system_info']['paths'])
+        cfg["system_info"]["distro"] = dtype
+        paths = helpers.Paths(cfg["system_info"]["paths"])
         distro_cls = distros.fetch(dtype)
         if def_user:
-            cfg['system_info']['default_user'] = def_user.copy()
-        distro = distro_cls(dtype, cfg['system_info'], paths)
+            cfg["system_info"]["default_user"] = def_user.copy()
+        distro = distro_cls(dtype, cfg["system_info"], paths)
         return distro
 
     def setUp(self):
         tmp = self.tmp_dir()
         self.ds = DataSourceGCE.DataSourceGCE(
-            settings.CFG_BUILTIN, None,
-            helpers.Paths({'run_dir': tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": tmp})
+        )
         ppatch = self.m_platform_reports_gce = mock.patch(
-            'cloudinit.sources.DataSourceGCE.platform_reports_gce')
+            "cloudinit.sources.DataSourceGCE.platform_reports_gce"
+        )
         self.m_platform_reports_gce = ppatch.start()
         self.m_platform_reports_gce.return_value = True
         self.addCleanup(ppatch.stop)
-        self.add_patch('time.sleep', 'm_sleep')  # just to speed up tests
+        self.add_patch("time.sleep", "m_sleep")  # just to speed up tests
         super(TestDataSourceGCE, self).setUp()
 
     def test_connection(self):
@@ -121,30 +120,33 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
     def test_metadata(self):
         # UnicodeDecodeError if set to ds.userdata instead of userdata_raw
         meta = GCE_META.copy()
-        meta['instance/attributes/user-data'] = b'/bin/echo \xff\n'
+        meta["instance/attributes/user-data"] = b"/bin/echo \xff\n"
 
         _set_mock_metadata()
         self.ds.get_data()
 
-        shostname = GCE_META.get('instance/hostname').split('.')[0]
-        self.assertEqual(shostname,
-                         self.ds.get_hostname())
+        shostname = GCE_META.get("instance/hostname").split(".")[0]
+        self.assertEqual(shostname, self.ds.get_hostname())
 
-        self.assertEqual(GCE_META.get('instance/id'),
-                         self.ds.get_instance_id())
+        self.assertEqual(
+            GCE_META.get("instance/id"), self.ds.get_instance_id()
+        )
 
-        self.assertEqual(GCE_META.get('instance/attributes/user-data'),
-                         self.ds.get_userdata_raw())
+        self.assertEqual(
+            GCE_META.get("instance/attributes/user-data"),
+            self.ds.get_userdata_raw(),
+        )
 
     # test partial metadata (missing user-data in particular)
     def test_metadata_partial(self):
         _set_mock_metadata(GCE_META_PARTIAL)
         self.ds.get_data()
 
-        self.assertEqual(GCE_META_PARTIAL.get('instance/id'),
-                         self.ds.get_instance_id())
+        self.assertEqual(
+            GCE_META_PARTIAL.get("instance/id"), self.ds.get_instance_id()
+        )
 
-        shostname = GCE_META_PARTIAL.get('instance/hostname').split('.')[0]
+        shostname = GCE_META_PARTIAL.get("instance/hostname").split(".")[0]
         self.assertEqual(shostname, self.ds.get_hostname())
 
     def test_userdata_no_encoding(self):
@@ -152,21 +154,25 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         _set_mock_metadata(GCE_USER_DATA_TEXT)
         self.ds.get_data()
         self.assertEqual(
-            GCE_USER_DATA_TEXT['instance/attributes']['user-data'].encode(),
-            self.ds.get_userdata_raw())
+            GCE_USER_DATA_TEXT["instance/attributes"]["user-data"].encode(),
+            self.ds.get_userdata_raw(),
+        )
 
     def test_metadata_encoding(self):
         """user-data is base64 encoded if user-data-encoding is 'base64'."""
         _set_mock_metadata(GCE_META_ENCODING)
         self.ds.get_data()
 
-        instance_data = GCE_META_ENCODING.get('instance/attributes')
-        decoded = b64decode(instance_data.get('user-data'))
+        instance_data = GCE_META_ENCODING.get("instance/attributes")
+        decoded = b64decode(instance_data.get("user-data"))
         self.assertEqual(decoded, self.ds.get_userdata_raw())
 
     def test_missing_required_keys_return_false(self):
-        for required_key in ['instance/id', 'instance/zone',
-                             'instance/hostname']:
+        for required_key in [
+            "instance/id",
+            "instance/zone",
+            "instance/hostname",
+        ]:
             meta = GCE_META_PARTIAL.copy()
             del meta[required_key]
             _set_mock_metadata(meta)
@@ -179,29 +185,35 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         self.assertEqual([], self.ds.get_public_ssh_keys())
 
     def test_cloudinit_ssh_keys(self):
-        valid_key = 'ssh-rsa VALID {0}'
-        invalid_key = 'ssh-rsa INVALID {0}'
+        valid_key = "ssh-rsa VALID {0}"
+        invalid_key = "ssh-rsa INVALID {0}"
         project_attributes = {
-            'sshKeys': '\n'.join([
-                'cloudinit:{0}'.format(valid_key.format(0)),
-                'user:{0}'.format(invalid_key.format(0)),
-            ]),
-            'ssh-keys': '\n'.join([
-                'cloudinit:{0}'.format(valid_key.format(1)),
-                'user:{0}'.format(invalid_key.format(1)),
-            ]),
+            "sshKeys": "\n".join(
+                [
+                    "cloudinit:{0}".format(valid_key.format(0)),
+                    "user:{0}".format(invalid_key.format(0)),
+                ]
+            ),
+            "ssh-keys": "\n".join(
+                [
+                    "cloudinit:{0}".format(valid_key.format(1)),
+                    "user:{0}".format(invalid_key.format(1)),
+                ]
+            ),
         }
         instance_attributes = {
-            'ssh-keys': '\n'.join([
-                'cloudinit:{0}'.format(valid_key.format(2)),
-                'user:{0}'.format(invalid_key.format(2)),
-            ]),
-            'block-project-ssh-keys': 'False',
+            "ssh-keys": "\n".join(
+                [
+                    "cloudinit:{0}".format(valid_key.format(2)),
+                    "user:{0}".format(invalid_key.format(2)),
+                ]
+            ),
+            "block-project-ssh-keys": "False",
         }
 
         meta = GCE_META.copy()
-        meta['project/attributes'] = project_attributes
-        meta['instance/attributes'] = instance_attributes
+        meta["project/attributes"] = project_attributes
+        meta["instance/attributes"] = instance_attributes
 
         _set_mock_metadata(meta)
         self.ds.get_data()
@@ -212,34 +224,42 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
     @mock.patch("cloudinit.sources.DataSourceGCE.ug_util")
     def test_default_user_ssh_keys(self, mock_ug_util):
         mock_ug_util.normalize_users_groups.return_value = None, None
-        mock_ug_util.extract_default.return_value = 'ubuntu', None
+        mock_ug_util.extract_default.return_value = "ubuntu", None
         ubuntu_ds = DataSourceGCE.DataSourceGCE(
-            settings.CFG_BUILTIN, self._make_distro('ubuntu'),
-            helpers.Paths({'run_dir': self.tmp_dir()}))
+            settings.CFG_BUILTIN,
+            self._make_distro("ubuntu"),
+            helpers.Paths({"run_dir": self.tmp_dir()}),
+        )
 
-        valid_key = 'ssh-rsa VALID {0}'
-        invalid_key = 'ssh-rsa INVALID {0}'
+        valid_key = "ssh-rsa VALID {0}"
+        invalid_key = "ssh-rsa INVALID {0}"
         project_attributes = {
-            'sshKeys': '\n'.join([
-                'ubuntu:{0}'.format(valid_key.format(0)),
-                'user:{0}'.format(invalid_key.format(0)),
-            ]),
-            'ssh-keys': '\n'.join([
-                'ubuntu:{0}'.format(valid_key.format(1)),
-                'user:{0}'.format(invalid_key.format(1)),
-            ]),
+            "sshKeys": "\n".join(
+                [
+                    "ubuntu:{0}".format(valid_key.format(0)),
+                    "user:{0}".format(invalid_key.format(0)),
+                ]
+            ),
+            "ssh-keys": "\n".join(
+                [
+                    "ubuntu:{0}".format(valid_key.format(1)),
+                    "user:{0}".format(invalid_key.format(1)),
+                ]
+            ),
         }
         instance_attributes = {
-            'ssh-keys': '\n'.join([
-                'ubuntu:{0}'.format(valid_key.format(2)),
-                'user:{0}'.format(invalid_key.format(2)),
-            ]),
-            'block-project-ssh-keys': 'False',
+            "ssh-keys": "\n".join(
+                [
+                    "ubuntu:{0}".format(valid_key.format(2)),
+                    "user:{0}".format(invalid_key.format(2)),
+                ]
+            ),
+            "block-project-ssh-keys": "False",
         }
 
         meta = GCE_META.copy()
-        meta['project/attributes'] = project_attributes
-        meta['instance/attributes'] = instance_attributes
+        meta["project/attributes"] = project_attributes
+        meta["instance/attributes"] = instance_attributes
 
         _set_mock_metadata(meta)
         ubuntu_ds.get_data()
@@ -248,21 +268,21 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         self.assertEqual(set(expected), set(ubuntu_ds.get_public_ssh_keys()))
 
     def test_instance_ssh_keys_override(self):
-        valid_key = 'ssh-rsa VALID {0}'
-        invalid_key = 'ssh-rsa INVALID {0}'
+        valid_key = "ssh-rsa VALID {0}"
+        invalid_key = "ssh-rsa INVALID {0}"
         project_attributes = {
-            'sshKeys': 'cloudinit:{0}'.format(invalid_key.format(0)),
-            'ssh-keys': 'cloudinit:{0}'.format(invalid_key.format(1)),
+            "sshKeys": "cloudinit:{0}".format(invalid_key.format(0)),
+            "ssh-keys": "cloudinit:{0}".format(invalid_key.format(1)),
         }
         instance_attributes = {
-            'sshKeys': 'cloudinit:{0}'.format(valid_key.format(0)),
-            'ssh-keys': 'cloudinit:{0}'.format(valid_key.format(1)),
-            'block-project-ssh-keys': 'False',
+            "sshKeys": "cloudinit:{0}".format(valid_key.format(0)),
+            "ssh-keys": "cloudinit:{0}".format(valid_key.format(1)),
+            "block-project-ssh-keys": "False",
         }
 
         meta = GCE_META.copy()
-        meta['project/attributes'] = project_attributes
-        meta['instance/attributes'] = instance_attributes
+        meta["project/attributes"] = project_attributes
+        meta["instance/attributes"] = instance_attributes
 
         _set_mock_metadata(meta)
         self.ds.get_data()
@@ -271,20 +291,20 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         self.assertEqual(set(expected), set(self.ds.get_public_ssh_keys()))
 
     def test_block_project_ssh_keys_override(self):
-        valid_key = 'ssh-rsa VALID {0}'
-        invalid_key = 'ssh-rsa INVALID {0}'
+        valid_key = "ssh-rsa VALID {0}"
+        invalid_key = "ssh-rsa INVALID {0}"
         project_attributes = {
-            'sshKeys': 'cloudinit:{0}'.format(invalid_key.format(0)),
-            'ssh-keys': 'cloudinit:{0}'.format(invalid_key.format(1)),
+            "sshKeys": "cloudinit:{0}".format(invalid_key.format(0)),
+            "ssh-keys": "cloudinit:{0}".format(invalid_key.format(1)),
         }
         instance_attributes = {
-            'ssh-keys': 'cloudinit:{0}'.format(valid_key.format(0)),
-            'block-project-ssh-keys': 'True',
+            "ssh-keys": "cloudinit:{0}".format(valid_key.format(0)),
+            "block-project-ssh-keys": "True",
         }
 
         meta = GCE_META.copy()
-        meta['project/attributes'] = project_attributes
-        meta['instance/attributes'] = instance_attributes
+        meta["project/attributes"] = project_attributes
+        meta["instance/attributes"] = instance_attributes
 
         _set_mock_metadata(meta)
         self.ds.get_data()
@@ -296,7 +316,7 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         _set_mock_metadata()
         r = self.ds.get_data()
         self.assertEqual(True, r)
-        self.assertEqual('bar', self.ds.availability_zone)
+        self.assertEqual("bar", self.ds.availability_zone)
 
     @mock.patch("cloudinit.sources.DataSourceGCE.GoogleMetadataFetcher")
     def test_get_data_returns_false_if_not_on_gce(self, m_fetcher):
@@ -306,9 +326,8 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         m_fetcher.assert_not_called()
 
     def test_has_expired(self):
-
         def _get_timestamp(days):
-            format_str = '%Y-%m-%dT%H:%M:%S+0000'
+            format_str = "%Y-%m-%dT%H:%M:%S+0000"
             today = datetime.datetime.now()
             timestamp = today + datetime.timedelta(days=days)
             return timestamp.strftime(format_str)
@@ -317,12 +336,12 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         future = _get_timestamp(1)
         ssh_keys = {
             None: False,
-            '': False,
-            'Invalid': False,
-            'user:ssh-rsa key user@domain.com': False,
+            "": False,
+            "Invalid": False,
+            "user:ssh-rsa key user@domain.com": False,
             'user:ssh-rsa key google {"expireOn":"%s"}' % past: False,
-            'user:ssh-rsa key google-ssh': False,
-            'user:ssh-rsa key google-ssh {invalid:json}': False,
+            "user:ssh-rsa key google-ssh": False,
+            "user:ssh-rsa key google-ssh {invalid:json}": False,
             'user:ssh-rsa key google-ssh {"userName":"user"}': False,
             'user:ssh-rsa key google-ssh {"expireOn":"invalid"}': False,
             'user:xyz key google-ssh {"expireOn":"%s"}' % future: False,
@@ -334,28 +353,36 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
 
     def test_parse_public_keys_non_ascii(self):
         public_key_data = [
-            'cloudinit:rsa ssh-ke%s invalid' % chr(165),
-            'use%sname:rsa ssh-key' % chr(174),
-            'cloudinit:test 1',
-            'default:test 2',
-            'user:test 3',
+            "cloudinit:rsa ssh-ke%s invalid" % chr(165),
+            "use%sname:rsa ssh-key" % chr(174),
+            "cloudinit:test 1",
+            "default:test 2",
+            "user:test 3",
         ]
-        expected = ['test 1', 'test 2']
+        expected = ["test 1", "test 2"]
         found = DataSourceGCE._parse_public_keys(
-            public_key_data, default_user='default')
+            public_key_data, default_user="default"
+        )
         self.assertEqual(sorted(found), sorted(expected))
 
     @mock.patch("cloudinit.url_helper.readurl")
     def test_publish_host_keys(self, m_readurl):
-        hostkeys = [('ssh-rsa', 'asdfasdf'),
-                    ('ssh-ed25519', 'qwerqwer')]
+        hostkeys = [("ssh-rsa", "asdfasdf"), ("ssh-ed25519", "qwerqwer")]
         readurl_expected_calls = [
-            mock.call(check_status=False, data=b'asdfasdf', headers=HEADERS,
-                      request_method='PUT',
-                      url='%s%s' % (GUEST_ATTRIBUTES_URL, 'ssh-rsa')),
-            mock.call(check_status=False, data=b'qwerqwer', headers=HEADERS,
-                      request_method='PUT',
-                      url='%s%s' % (GUEST_ATTRIBUTES_URL, 'ssh-ed25519')),
+            mock.call(
+                check_status=False,
+                data=b"asdfasdf",
+                headers=HEADERS,
+                request_method="PUT",
+                url="%s%s" % (GUEST_ATTRIBUTES_URL, "ssh-rsa"),
+            ),
+            mock.call(
+                check_status=False,
+                data=b"qwerqwer",
+                headers=HEADERS,
+                request_method="PUT",
+                url="%s%s" % (GUEST_ATTRIBUTES_URL, "ssh-ed25519"),
+            ),
         ]
         self.ds.publish_host_keys(hostkeys)
         m_readurl.assert_has_calls(readurl_expected_calls, any_order=True)
@@ -385,4 +412,5 @@ class TestDataSourceGCE(test_helpers.HttprettyTestCase):
         ds._get_data()
         assert m_dhcp.call_count == 0
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_hetzner.py b/tests/unittests/sources/test_hetzner.py
index 5af0f3db..9e70de34 100644
--- a/tests/unittests/sources/test_hetzner.py
+++ b/tests/unittests/sources/test_hetzner.py
@@ -4,16 +4,17 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.sources import DataSourceHetzner
-import cloudinit.sources.helpers.hetzner as hc_helper
-from cloudinit import util, settings, helpers
-
-from tests.unittests.helpers import mock, CiTestCase
-
 import base64
+
 import pytest
 
-METADATA = util.load_yaml("""
+import cloudinit.sources.helpers.hetzner as hc_helper
+from cloudinit import helpers, settings, util
+from cloudinit.sources import DataSourceHetzner
+from tests.unittests.helpers import CiTestCase, mock
+
+METADATA = util.load_yaml(
+    """
 hostname: cloudinit-test
 instance-id: 123456
 local-ipv4: ''
@@ -52,7 +53,8 @@ public-keys:
   AAAAC3Nzac1lZdI1NTE5AaaAIaFrcac0yVITsmRrmueq6MD0qYNKlEvW8O1Ib4nkhmWh \
   test-key@workstation
 vendor_data: "test"
-""")
+"""
+)
 
 USERDATA = b"""#cloud-config
 runcmd:
@@ -64,55 +66,59 @@ class TestDataSourceHetzner(CiTestCase):
     """
     Test reading the meta-data
     """
+
     def setUp(self):
         super(TestDataSourceHetzner, self).setUp()
         self.tmp = self.tmp_dir()
 
     def get_ds(self):
         ds = DataSourceHetzner.DataSourceHetzner(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         return ds
 
-    @mock.patch('cloudinit.net.EphemeralIPv4Network')
-    @mock.patch('cloudinit.net.find_fallback_nic')
-    @mock.patch('cloudinit.sources.helpers.hetzner.read_metadata')
-    @mock.patch('cloudinit.sources.helpers.hetzner.read_userdata')
-    @mock.patch('cloudinit.sources.DataSourceHetzner.get_hcloud_data')
-    def test_read_data(self, m_get_hcloud_data, m_usermd, m_readmd,
-                       m_fallback_nic, m_net):
-        m_get_hcloud_data.return_value = (True,
-                                          str(METADATA.get('instance-id')))
+    @mock.patch("cloudinit.net.EphemeralIPv4Network")
+    @mock.patch("cloudinit.net.find_fallback_nic")
+    @mock.patch("cloudinit.sources.helpers.hetzner.read_metadata")
+    @mock.patch("cloudinit.sources.helpers.hetzner.read_userdata")
+    @mock.patch("cloudinit.sources.DataSourceHetzner.get_hcloud_data")
+    def test_read_data(
+        self, m_get_hcloud_data, m_usermd, m_readmd, m_fallback_nic, m_net
+    ):
+        m_get_hcloud_data.return_value = (
+            True,
+            str(METADATA.get("instance-id")),
+        )
         m_readmd.return_value = METADATA.copy()
         m_usermd.return_value = USERDATA
-        m_fallback_nic.return_value = 'eth0'
+        m_fallback_nic.return_value = "eth0"
 
         ds = self.get_ds()
         ret = ds.get_data()
         self.assertTrue(ret)
 
         m_net.assert_called_once_with(
-            'eth0', '169.254.0.1',
-            16, '169.254.255.255'
+            "eth0", "169.254.0.1", 16, "169.254.255.255"
         )
 
         self.assertTrue(m_readmd.called)
 
-        self.assertEqual(METADATA.get('hostname'), ds.get_hostname())
+        self.assertEqual(METADATA.get("hostname"), ds.get_hostname())
 
-        self.assertEqual(METADATA.get('public-keys'),
-                         ds.get_public_ssh_keys())
+        self.assertEqual(METADATA.get("public-keys"), ds.get_public_ssh_keys())
 
         self.assertIsInstance(ds.get_public_ssh_keys(), list)
         self.assertEqual(ds.get_userdata_raw(), USERDATA)
-        self.assertEqual(ds.get_vendordata_raw(), METADATA.get('vendor_data'))
-
-    @mock.patch('cloudinit.sources.helpers.hetzner.read_metadata')
-    @mock.patch('cloudinit.net.find_fallback_nic')
-    @mock.patch('cloudinit.sources.DataSourceHetzner.get_hcloud_data')
-    def test_not_on_hetzner_returns_false(self, m_get_hcloud_data,
-                                          m_find_fallback, m_read_md):
+        self.assertEqual(ds.get_vendordata_raw(), METADATA.get("vendor_data"))
+
+    @mock.patch("cloudinit.sources.helpers.hetzner.read_metadata")
+    @mock.patch("cloudinit.net.find_fallback_nic")
+    @mock.patch("cloudinit.sources.DataSourceHetzner.get_hcloud_data")
+    def test_not_on_hetzner_returns_false(
+        self, m_get_hcloud_data, m_find_fallback, m_read_md
+    ):
         """If helper 'get_hcloud_data' returns False,
-           return False from get_data."""
+        return False from get_data."""
         m_get_hcloud_data.return_value = (False, None)
         ds = self.get_ds()
         ret = ds.get_data()
@@ -132,11 +138,14 @@ class TestMaybeB64Decode:
         with pytest.raises(TypeError):
             hc_helper.maybe_b64decode(invalid_input)
 
-    @pytest.mark.parametrize("in_data,expected", [
-        # If data is not b64 encoded, then return value should be the same.
-        (b"this is my data", b"this is my data"),
-        # If data is b64 encoded, then return value should be decoded.
-        (base64.b64encode(b"data"), b"data"),
-    ])
+    @pytest.mark.parametrize(
+        "in_data,expected",
+        [
+            # If data is not b64 encoded, then return value should be the same.
+            (b"this is my data", b"this is my data"),
+            # If data is b64 encoded, then return value should be decoded.
+            (base64.b64encode(b"data"), b"data"),
+        ],
+    )
     def test_happy_path(self, in_data, expected):
         assert expected == hc_helper.maybe_b64decode(in_data)
diff --git a/tests/unittests/sources/test_ibmcloud.py b/tests/unittests/sources/test_ibmcloud.py
index 38e8e892..17a8be64 100644
--- a/tests/unittests/sources/test_ibmcloud.py
+++ b/tests/unittests/sources/test_ibmcloud.py
@@ -1,15 +1,15 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.helpers import Paths
-from cloudinit.sources import DataSourceIBMCloud as ibm
-from tests.unittests import helpers as test_helpers
-from cloudinit import util
-
 import base64
 import copy
 import json
 from textwrap import dedent
 
+from cloudinit import util
+from cloudinit.helpers import Paths
+from cloudinit.sources import DataSourceIBMCloud as ibm
+from tests.unittests import helpers as test_helpers
+
 mock = test_helpers.mock
 
 D_PATH = "cloudinit.sources.DataSourceIBMCloud."
@@ -23,24 +23,36 @@ class TestGetIBMPlatform(test_helpers.CiTestCase):
 
     blkid_base = {
         "/dev/xvda1": {
-            "DEVNAME": "/dev/xvda1", "LABEL": "cloudimg-bootfs",
-            "TYPE": "ext3"},
+            "DEVNAME": "/dev/xvda1",
+            "LABEL": "cloudimg-bootfs",
+            "TYPE": "ext3",
+        },
         "/dev/xvda2": {
-            "DEVNAME": "/dev/xvda2", "LABEL": "cloudimg-rootfs",
-            "TYPE": "ext4"},
+            "DEVNAME": "/dev/xvda2",
+            "LABEL": "cloudimg-rootfs",
+            "TYPE": "ext4",
+        },
     }
 
     blkid_metadata_disk = {
         "/dev/xvdh1": {
-            "DEVNAME": "/dev/xvdh1", "LABEL": "METADATA", "TYPE": "vfat",
-            "SEC_TYPE": "msdos", "UUID": "681B-8C5D",
-            "PARTUUID": "3d631e09-01"},
+            "DEVNAME": "/dev/xvdh1",
+            "LABEL": "METADATA",
+            "TYPE": "vfat",
+            "SEC_TYPE": "msdos",
+            "UUID": "681B-8C5D",
+            "PARTUUID": "3d631e09-01",
+        },
     }
 
     blkid_oscode_disk = {
         "/dev/xvdh": {
-            "DEVNAME": "/dev/xvdh", "LABEL": "config-2", "TYPE": "vfat",
-            "SEC_TYPE": "msdos", "UUID": ibm.IBM_CONFIG_UUID}
+            "DEVNAME": "/dev/xvdh",
+            "LABEL": "config-2",
+            "TYPE": "vfat",
+            "SEC_TYPE": "msdos",
+            "UUID": ibm.IBM_CONFIG_UUID,
+        }
     }
 
     def setUp(self):
@@ -56,7 +68,8 @@ class TestGetIBMPlatform(test_helpers.CiTestCase):
         m_is_prov.return_value = False
         self.assertEqual(
             (ibm.Platforms.TEMPLATE_LIVE_METADATA, "/dev/xvdh1"),
-            ibm.get_ibm_platform())
+            ibm.get_ibm_platform(),
+        )
 
     def test_id_template_prov_metadata(self, m_blkid, m_is_prov, _m_xen):
         """identify TEMPLATE_PROVISIONING_METADATA."""
@@ -64,7 +77,8 @@ class TestGetIBMPlatform(test_helpers.CiTestCase):
         m_is_prov.return_value = True
         self.assertEqual(
             (ibm.Platforms.TEMPLATE_PROVISIONING_METADATA, "/dev/xvdh1"),
-            ibm.get_ibm_platform())
+            ibm.get_ibm_platform(),
+        )
 
     def test_id_template_prov_nodata(self, m_blkid, m_is_prov, _m_xen):
         """identify TEMPLATE_PROVISIONING_NODATA."""
@@ -72,14 +86,16 @@ class TestGetIBMPlatform(test_helpers.CiTestCase):
         m_is_prov.return_value = True
         self.assertEqual(
             (ibm.Platforms.TEMPLATE_PROVISIONING_NODATA, None),
-            ibm.get_ibm_platform())
+            ibm.get_ibm_platform(),
+        )
 
     def test_id_os_code(self, m_blkid, m_is_prov, _m_xen):
         """Identify OS_CODE."""
         m_blkid.return_value = self.blkid_oscode
         m_is_prov.return_value = False
-        self.assertEqual((ibm.Platforms.OS_CODE, "/dev/xvdh"),
-                         ibm.get_ibm_platform())
+        self.assertEqual(
+            (ibm.Platforms.OS_CODE, "/dev/xvdh"), ibm.get_ibm_platform()
+        )
 
     def test_id_os_code_must_match_uuid(self, m_blkid, m_is_prov, _m_xen):
         """Test against false positive on openstack with non-ibm UUID."""
@@ -116,7 +132,8 @@ class TestReadMD(test_helpers.CiTestCase):
         "public_keys": {"1091307": "ssh-rsa AAAAB3N..Hw== ci-pubkey"},
     }
 
-    content_interfaces = dedent("""\
+    content_interfaces = dedent(
+        """\
         auto lo
         iface lo inet loopback
 
@@ -125,71 +142,107 @@ class TestReadMD(test_helpers.CiTestCase):
         iface eth0 inet static
         address 10.82.43.5
         netmask 255.255.255.192
-        """)
+        """
+    )
 
     userdata = b"#!/bin/sh\necho hi mom\n"
     # meta.js file gets json encoded userdata as a list.
     meta_js = '["#!/bin/sh\necho hi mom\n"]'
     vendor_data = {
-        "cloud-init": "#!/bin/bash\necho 'root:$6$5ab01p1m1' | chpasswd -e"}
+        "cloud-init": "#!/bin/bash\necho 'root:$6$5ab01p1m1' | chpasswd -e"
+    }
 
     network_data = {
         "links": [
-            {"id": "interface_29402281", "name": "eth0", "mtu": None,
-             "type": "phy", "ethernet_mac_address": "06:00:f1:bd:da:25"},
-            {"id": "interface_29402279", "name": "eth1", "mtu": None,
-             "type": "phy", "ethernet_mac_address": "06:98:5e:d0:7f:86"}
+            {
+                "id": "interface_29402281",
+                "name": "eth0",
+                "mtu": None,
+                "type": "phy",
+                "ethernet_mac_address": "06:00:f1:bd:da:25",
+            },
+            {
+                "id": "interface_29402279",
+                "name": "eth1",
+                "mtu": None,
+                "type": "phy",
+                "ethernet_mac_address": "06:98:5e:d0:7f:86",
+            },
         ],
         "networks": [
-            {"id": "network_109887563", "link": "interface_29402281",
-             "type": "ipv4", "ip_address": "10.82.43.2",
-             "netmask": "255.255.255.192",
-             "routes": [
-                 {"network": "10.0.0.0", "netmask": "255.0.0.0",
-                  "gateway": "10.82.43.1"},
-                 {"network": "161.26.0.0", "netmask": "255.255.0.0",
-                  "gateway": "10.82.43.1"}]},
-            {"id": "network_109887551", "link": "interface_29402279",
-             "type": "ipv4", "ip_address": "108.168.194.252",
-             "netmask": "255.255.255.248",
-             "routes": [
-                 {"network": "0.0.0.0", "netmask": "0.0.0.0",
-                  "gateway": "108.168.194.249"}]}
+            {
+                "id": "network_109887563",
+                "link": "interface_29402281",
+                "type": "ipv4",
+                "ip_address": "10.82.43.2",
+                "netmask": "255.255.255.192",
+                "routes": [
+                    {
+                        "network": "10.0.0.0",
+                        "netmask": "255.0.0.0",
+                        "gateway": "10.82.43.1",
+                    },
+                    {
+                        "network": "161.26.0.0",
+                        "netmask": "255.255.0.0",
+                        "gateway": "10.82.43.1",
+                    },
+                ],
+            },
+            {
+                "id": "network_109887551",
+                "link": "interface_29402279",
+                "type": "ipv4",
+                "ip_address": "108.168.194.252",
+                "netmask": "255.255.255.248",
+                "routes": [
+                    {
+                        "network": "0.0.0.0",
+                        "netmask": "0.0.0.0",
+                        "gateway": "108.168.194.249",
+                    }
+                ],
+            },
         ],
         "services": [
             {"type": "dns", "address": "10.0.80.11"},
-            {"type": "dns", "address": "10.0.80.12"}
+            {"type": "dns", "address": "10.0.80.12"},
         ],
     }
 
-    sysuuid = '7f79ebf5-d791-43c3-a723-854e8389d59f'
+    sysuuid = "7f79ebf5-d791-43c3-a723-854e8389d59f"
 
     def _get_expected_metadata(self, os_md):
         """return expected 'metadata' for data loaded from meta_data.json."""
         os_md = copy.deepcopy(os_md)
         renames = (
-            ('hostname', 'local-hostname'),
-            ('uuid', 'instance-id'),
-            ('public_keys', 'public-keys'))
+            ("hostname", "local-hostname"),
+            ("uuid", "instance-id"),
+            ("public_keys", "public-keys"),
+        )
         ret = {}
         for osname, mdname in renames:
             if osname in os_md:
                 ret[mdname] = os_md[osname]
-        if 'random_seed' in os_md:
-            ret['random_seed'] = base64.b64decode(os_md['random_seed'])
+        if "random_seed" in os_md:
+            ret["random_seed"] = base64.b64decode(os_md["random_seed"])
 
         return ret
 
     def test_provisioning_md(self, m_platform, m_sysuuid):
         """Provisioning env with a metadata disk should return None."""
         m_platform.return_value = (
-            ibm.Platforms.TEMPLATE_PROVISIONING_METADATA, "/dev/xvdh")
+            ibm.Platforms.TEMPLATE_PROVISIONING_METADATA,
+            "/dev/xvdh",
+        )
         self.assertIsNone(ibm.read_md())
 
     def test_provisioning_no_metadata(self, m_platform, m_sysuuid):
         """Provisioning env with no metadata disk should return None."""
         m_platform.return_value = (
-            ibm.Platforms.TEMPLATE_PROVISIONING_NODATA, None)
+            ibm.Platforms.TEMPLATE_PROVISIONING_NODATA,
+            None,
+        )
         self.assertIsNone(ibm.read_md())
 
     def test_provisioning_not_ibm(self, m_platform, m_sysuuid):
@@ -201,62 +254,83 @@ class TestReadMD(test_helpers.CiTestCase):
         """Template live environment should be identified."""
         tmpdir = self.tmp_dir()
         m_platform.return_value = (
-            ibm.Platforms.TEMPLATE_LIVE_METADATA, tmpdir)
+            ibm.Platforms.TEMPLATE_LIVE_METADATA,
+            tmpdir,
+        )
         m_sysuuid.return_value = self.sysuuid
 
-        test_helpers.populate_dir(tmpdir, {
-            'openstack/latest/meta_data.json': json.dumps(self.template_md),
-            'openstack/latest/user_data': self.userdata,
-            'openstack/content/interfaces': self.content_interfaces,
-            'meta.js': self.meta_js})
+        test_helpers.populate_dir(
+            tmpdir,
+            {
+                "openstack/latest/meta_data.json": json.dumps(
+                    self.template_md
+                ),
+                "openstack/latest/user_data": self.userdata,
+                "openstack/content/interfaces": self.content_interfaces,
+                "meta.js": self.meta_js,
+            },
+        )
 
         ret = ibm.read_md()
-        self.assertEqual(ibm.Platforms.TEMPLATE_LIVE_METADATA,
-                         ret['platform'])
-        self.assertEqual(tmpdir, ret['source'])
-        self.assertEqual(self.userdata, ret['userdata'])
-        self.assertEqual(self._get_expected_metadata(self.template_md),
-                         ret['metadata'])
-        self.assertEqual(self.sysuuid, ret['system-uuid'])
+        self.assertEqual(ibm.Platforms.TEMPLATE_LIVE_METADATA, ret["platform"])
+        self.assertEqual(tmpdir, ret["source"])
+        self.assertEqual(self.userdata, ret["userdata"])
+        self.assertEqual(
+            self._get_expected_metadata(self.template_md), ret["metadata"]
+        )
+        self.assertEqual(self.sysuuid, ret["system-uuid"])
 
     def test_os_code_live(self, m_platform, m_sysuuid):
         """Verify an os_code metadata path."""
         tmpdir = self.tmp_dir()
         m_platform.return_value = (ibm.Platforms.OS_CODE, tmpdir)
         netdata = json.dumps(self.network_data)
-        test_helpers.populate_dir(tmpdir, {
-            'openstack/latest/meta_data.json': json.dumps(self.oscode_md),
-            'openstack/latest/user_data': self.userdata,
-            'openstack/latest/vendor_data.json': json.dumps(self.vendor_data),
-            'openstack/latest/network_data.json': netdata,
-        })
+        test_helpers.populate_dir(
+            tmpdir,
+            {
+                "openstack/latest/meta_data.json": json.dumps(self.oscode_md),
+                "openstack/latest/user_data": self.userdata,
+                "openstack/latest/vendor_data.json": json.dumps(
+                    self.vendor_data
+                ),
+                "openstack/latest/network_data.json": netdata,
+            },
+        )
 
         ret = ibm.read_md()
-        self.assertEqual(ibm.Platforms.OS_CODE, ret['platform'])
-        self.assertEqual(tmpdir, ret['source'])
-        self.assertEqual(self.userdata, ret['userdata'])
-        self.assertEqual(self._get_expected_metadata(self.oscode_md),
-                         ret['metadata'])
+        self.assertEqual(ibm.Platforms.OS_CODE, ret["platform"])
+        self.assertEqual(tmpdir, ret["source"])
+        self.assertEqual(self.userdata, ret["userdata"])
+        self.assertEqual(
+            self._get_expected_metadata(self.oscode_md), ret["metadata"]
+        )
 
     def test_os_code_live_no_userdata(self, m_platform, m_sysuuid):
         """Verify os_code without user-data."""
         tmpdir = self.tmp_dir()
         m_platform.return_value = (ibm.Platforms.OS_CODE, tmpdir)
-        test_helpers.populate_dir(tmpdir, {
-            'openstack/latest/meta_data.json': json.dumps(self.oscode_md),
-            'openstack/latest/vendor_data.json': json.dumps(self.vendor_data),
-        })
+        test_helpers.populate_dir(
+            tmpdir,
+            {
+                "openstack/latest/meta_data.json": json.dumps(self.oscode_md),
+                "openstack/latest/vendor_data.json": json.dumps(
+                    self.vendor_data
+                ),
+            },
+        )
 
         ret = ibm.read_md()
-        self.assertEqual(ibm.Platforms.OS_CODE, ret['platform'])
-        self.assertEqual(tmpdir, ret['source'])
-        self.assertIsNone(ret['userdata'])
-        self.assertEqual(self._get_expected_metadata(self.oscode_md),
-                         ret['metadata'])
+        self.assertEqual(ibm.Platforms.OS_CODE, ret["platform"])
+        self.assertEqual(tmpdir, ret["source"])
+        self.assertIsNone(ret["userdata"])
+        self.assertEqual(
+            self._get_expected_metadata(self.oscode_md), ret["metadata"]
+        )
 
 
 class TestIsIBMProvisioning(test_helpers.FilesystemMockingTestCase):
     """Test the _is_ibm_provisioning method."""
+
     inst_log = "/root/swinstall.log"
     prov_cfg = "/root/provisioningConfiguration.cfg"
     boot_ref = "/proc/1/environ"
@@ -279,9 +353,11 @@ class TestIsIBMProvisioning(test_helpers.FilesystemMockingTestCase):
     def test_config_with_old_log(self):
         """A config with a log from previous boot is not provisioning."""
         rootd = self.tmp_dir()
-        data = {self.prov_cfg: ("key=value\nkey2=val2\n", -10),
-                self.inst_log: ("log data\n", -30),
-                self.boot_ref: ("PWD=/", 0)}
+        data = {
+            self.prov_cfg: ("key=value\nkey2=val2\n", -10),
+            self.inst_log: ("log data\n", -30),
+            self.boot_ref: ("PWD=/", 0),
+        }
         test_helpers.populate_dir_with_ts(rootd, data)
         self.assertFalse(self._call_with_root(rootd=rootd))
         self.assertIn("from previous boot", self.logs.getvalue())
@@ -289,9 +365,11 @@ class TestIsIBMProvisioning(test_helpers.FilesystemMockingTestCase):
     def test_config_with_new_log(self):
         """A config with a log from this boot is provisioning."""
         rootd = self.tmp_dir()
-        data = {self.prov_cfg: ("key=value\nkey2=val2\n", -10),
-                self.inst_log: ("log data\n", 30),
-                self.boot_ref: ("PWD=/", 0)}
+        data = {
+            self.prov_cfg: ("key=value\nkey2=val2\n", -10),
+            self.inst_log: ("log data\n", 30),
+            self.boot_ref: ("PWD=/", 0),
+        }
         test_helpers.populate_dir_with_ts(rootd, data)
         self.assertTrue(self._call_with_root(rootd=rootd))
         self.assertIn("from current boot", self.logs.getvalue())
@@ -300,44 +378,49 @@ class TestIsIBMProvisioning(test_helpers.FilesystemMockingTestCase):
         """If the config and log existed, but no reference, assume not."""
         rootd = self.tmp_dir()
         test_helpers.populate_dir(
-            rootd, {self.prov_cfg: "key=value", self.inst_log: "log data\n"})
+            rootd, {self.prov_cfg: "key=value", self.inst_log: "log data\n"}
+        )
         self.assertFalse(self._call_with_root(rootd=rootd))
         self.assertIn("no reference file", self.logs.getvalue())
 
 
 class TestDataSourceIBMCloud(test_helpers.CiTestCase):
-
     def setUp(self):
         super(TestDataSourceIBMCloud, self).setUp()
         self.tmp = self.tmp_dir()
-        self.cloud_dir = self.tmp_path('cloud', dir=self.tmp)
+        self.cloud_dir = self.tmp_path("cloud", dir=self.tmp)
         util.ensure_dir(self.cloud_dir)
-        paths = Paths({'run_dir': self.tmp, 'cloud_dir': self.cloud_dir})
-        self.ds = ibm.DataSourceIBMCloud(
-            sys_cfg={}, distro=None, paths=paths)
+        paths = Paths({"run_dir": self.tmp, "cloud_dir": self.cloud_dir})
+        self.ds = ibm.DataSourceIBMCloud(sys_cfg={}, distro=None, paths=paths)
 
     def test_get_data_false(self):
         """When read_md returns None, get_data returns False."""
-        with mock.patch(D_PATH + 'read_md', return_value=None):
+        with mock.patch(D_PATH + "read_md", return_value=None):
             self.assertFalse(self.ds.get_data())
 
     def test_get_data_processes_read_md(self):
         """get_data processes and caches content returned by read_md."""
         md = {
-            'metadata': {}, 'networkdata': 'net', 'platform': 'plat',
-            'source': 'src', 'system-uuid': 'uuid', 'userdata': 'ud',
-            'vendordata': 'vd'}
-        with mock.patch(D_PATH + 'read_md', return_value=md):
+            "metadata": {},
+            "networkdata": "net",
+            "platform": "plat",
+            "source": "src",
+            "system-uuid": "uuid",
+            "userdata": "ud",
+            "vendordata": "vd",
+        }
+        with mock.patch(D_PATH + "read_md", return_value=md):
             self.assertTrue(self.ds.get_data())
-        self.assertEqual('src', self.ds.source)
-        self.assertEqual('plat', self.ds.platform)
+        self.assertEqual("src", self.ds.source)
+        self.assertEqual("plat", self.ds.platform)
         self.assertEqual({}, self.ds.metadata)
-        self.assertEqual('ud', self.ds.userdata_raw)
-        self.assertEqual('net', self.ds.network_json)
-        self.assertEqual('vd', self.ds.vendordata_pure)
-        self.assertEqual('uuid', self.ds.system_uuid)
-        self.assertEqual('ibmcloud', self.ds.cloud_name)
-        self.assertEqual('ibmcloud', self.ds.platform_type)
-        self.assertEqual('plat (src)', self.ds.subplatform)
+        self.assertEqual("ud", self.ds.userdata_raw)
+        self.assertEqual("net", self.ds.network_json)
+        self.assertEqual("vd", self.ds.vendordata_pure)
+        self.assertEqual("uuid", self.ds.system_uuid)
+        self.assertEqual("ibmcloud", self.ds.cloud_name)
+        self.assertEqual("ibmcloud", self.ds.platform_type)
+        self.assertEqual("plat (src)", self.ds.subplatform)
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_init.py b/tests/unittests/sources/test_init.py
index a1d19518..745a7fa6 100644
--- a/tests/unittests/sources/test_init.py
+++ b/tests/unittests/sources/test_init.py
@@ -5,46 +5,60 @@ import inspect
 import os
 import stat
 
+from cloudinit import importer, util
 from cloudinit.event import EventScope, EventType
 from cloudinit.helpers import Paths
-from cloudinit import importer
 from cloudinit.sources import (
-    EXPERIMENTAL_TEXT, INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE,
-    METADATA_UNKNOWN, REDACT_SENSITIVE_VALUE, UNSET, DataSource,
-    canonical_cloud_id, redact_sensitive_keys)
-from tests.unittests.helpers import CiTestCase, mock
+    EXPERIMENTAL_TEXT,
+    INSTANCE_JSON_FILE,
+    INSTANCE_JSON_SENSITIVE_FILE,
+    METADATA_UNKNOWN,
+    REDACT_SENSITIVE_VALUE,
+    UNSET,
+    DataSource,
+    canonical_cloud_id,
+    redact_sensitive_keys,
+)
 from cloudinit.user_data import UserDataProcessor
-from cloudinit import util
+from tests.unittests.helpers import CiTestCase, mock
 
 
 class DataSourceTestSubclassNet(DataSource):
 
-    dsname = 'MyTestSubclass'
+    dsname = "MyTestSubclass"
     url_max_wait = 55
 
-    def __init__(self, sys_cfg, distro, paths, custom_metadata=None,
-                 custom_userdata=None, get_data_retval=True):
-        super(DataSourceTestSubclassNet, self).__init__(
-            sys_cfg, distro, paths)
+    def __init__(
+        self,
+        sys_cfg,
+        distro,
+        paths,
+        custom_metadata=None,
+        custom_userdata=None,
+        get_data_retval=True,
+    ):
+        super(DataSourceTestSubclassNet, self).__init__(sys_cfg, distro, paths)
         self._custom_userdata = custom_userdata
         self._custom_metadata = custom_metadata
         self._get_data_retval = get_data_retval
 
     def _get_cloud_name(self):
-        return 'SubclassCloudName'
+        return "SubclassCloudName"
 
     def _get_data(self):
         if self._custom_metadata:
             self.metadata = self._custom_metadata
         else:
-            self.metadata = {'availability_zone': 'myaz',
-                             'local-hostname': 'test-subclass-hostname',
-                             'region': 'myregion'}
+            self.metadata = {
+                "availability_zone": "myaz",
+                "local-hostname": "test-subclass-hostname",
+                "region": "myregion",
+            }
         if self._custom_userdata:
             self.userdata_raw = self._custom_userdata
         else:
-            self.userdata_raw = 'userdata_raw'
-        self.vendordata_raw = 'vendordata_raw'
+            self.userdata_raw = "userdata_raw"
+        self.vendordata_raw = "vendordata_raw"
         return self._get_data_retval
 
 
@@ -59,8 +73,8 @@ class TestDataSource(CiTestCase):
 
     def setUp(self):
         super(TestDataSource, self).setUp()
-        self.sys_cfg = {'datasource': {'_undef': {'key1': False}}}
-        self.distro = 'distrotest'  # generally should be a Distro object
+        self.sys_cfg = {"datasource": {"_undef": {"key1": False}}}
+        self.distro = "distrotest"  # generally should be a Distro object
         self.paths = Paths({})
         self.datasource = DataSource(self.sys_cfg, self.distro, self.paths)
 
@@ -74,22 +88,23 @@ class TestDataSource(CiTestCase):
         self.assertIsNone(self.datasource.userdata_raw)
         self.assertIsNone(self.datasource.vendordata)
         self.assertIsNone(self.datasource.vendordata_raw)
-        self.assertEqual({'key1': False}, self.datasource.ds_cfg)
+        self.assertEqual({"key1": False}, self.datasource.ds_cfg)
         self.assertIsInstance(self.datasource.ud_proc, UserDataProcessor)
 
     def test_datasource_init_gets_ds_cfg_using_dsname(self):
         """Init uses DataSource.dsname for sourcing ds_cfg."""
-        sys_cfg = {'datasource': {'MyTestSubclass': {'key2': False}}}
-        distro = 'distrotest'  # generally should be a Distro object
+        sys_cfg = {"datasource": {"MyTestSubclass": {"key2": False}}}
+        distro = "distrotest"  # generally should be a Distro object
         datasource = DataSourceTestSubclassNet(sys_cfg, distro, self.paths)
-        self.assertEqual({'key2': False}, datasource.ds_cfg)
+        self.assertEqual({"key2": False}, datasource.ds_cfg)
 
     def test_str_is_classname(self):
         """The string representation of the datasource is the classname."""
-        self.assertEqual('DataSource', str(self.datasource))
+        self.assertEqual("DataSource", str(self.datasource))
         self.assertEqual(
-            'DataSourceTestSubclassNet',
-            str(DataSourceTestSubclassNet('', '', self.paths)))
+            "DataSourceTestSubclassNet",
+            str(DataSourceTestSubclassNet("", "", self.paths)),
+        )
 
     def test_datasource_get_url_params_defaults(self):
         """get_url_params default url config settings for the datasource."""
@@ -97,16 +112,21 @@ class TestDataSource(CiTestCase):
         self.assertEqual(params.max_wait_seconds, self.datasource.url_max_wait)
         self.assertEqual(params.timeout_seconds, self.datasource.url_timeout)
         self.assertEqual(params.num_retries, self.datasource.url_retries)
-        self.assertEqual(params.sec_between_retries,
-                         self.datasource.url_sec_between_retries)
+        self.assertEqual(
+            params.sec_between_retries, self.datasource.url_sec_between_retries
+        )
 
     def test_datasource_get_url_params_subclassed(self):
         """Subclasses can override get_url_params defaults."""
-        sys_cfg = {'datasource': {'MyTestSubclass': {'key2': False}}}
-        distro = 'distrotest'  # generally should be a Distro object
+        sys_cfg = {"datasource": {"MyTestSubclass": {"key2": False}}}
+        distro = "distrotest"  # generally should be a Distro object
         datasource = DataSourceTestSubclassNet(sys_cfg, distro, self.paths)
-        expected = (datasource.url_max_wait, datasource.url_timeout,
-                    datasource.url_retries, datasource.url_sec_between_retries)
+        expected = (
+            datasource.url_max_wait,
+            datasource.url_timeout,
+            datasource.url_retries,
+            datasource.url_sec_between_retries,
+        )
         url_params = datasource.get_url_params()
         self.assertNotEqual(self.datasource.get_url_params(), url_params)
         self.assertEqual(expected, url_params)
@@ -114,40 +134,64 @@ class TestDataSource(CiTestCase):
     def test_datasource_get_url_params_ds_config_override(self):
         """Datasource configuration options can override url param defaults."""
         sys_cfg = {
-            'datasource': {
-                'MyTestSubclass': {
-                    'max_wait': '1', 'timeout': '2',
-                    'retries': '3', 'sec_between_retries': 4
-                }}}
+            "datasource": {
+                "MyTestSubclass": {
+                    "max_wait": "1",
+                    "timeout": "2",
+                    "retries": "3",
+                    "sec_between_retries": 4,
+                }
+            }
+        }
         datasource = DataSourceTestSubclassNet(
-            sys_cfg, self.distro, self.paths)
+            sys_cfg, self.distro, self.paths
+        )
         expected = (1, 2, 3, 4)
         url_params = datasource.get_url_params()
         self.assertNotEqual(
-            (datasource.url_max_wait, datasource.url_timeout,
-             datasource.url_retries, datasource.url_sec_between_retries),
-            url_params)
+            (
+                datasource.url_max_wait,
+                datasource.url_timeout,
+                datasource.url_retries,
+                datasource.url_sec_between_retries,
+            ),
+            url_params,
+        )
         self.assertEqual(expected, url_params)
 
     def test_datasource_get_url_params_is_zero_or_greater(self):
         """get_url_params ignores timeouts with a value below 0."""
         # Set an override that is below 0 which gets ignored.
-        sys_cfg = {'datasource': {'_undef': {'timeout': '-1'}}}
+        sys_cfg = {"datasource": {"_undef": {"timeout": "-1"}}}
         datasource = DataSource(sys_cfg, self.distro, self.paths)
-        (_max_wait, timeout, _retries,
-         _sec_between_retries) = datasource.get_url_params()
+        (
+            _max_wait,
+            timeout,
+            _retries,
+            _sec_between_retries,
+        ) = datasource.get_url_params()
         self.assertEqual(0, timeout)
 
     def test_datasource_get_url_uses_defaults_on_errors(self):
         """On invalid system config values for url_params defaults are used."""
         # All invalid values should be logged
-        sys_cfg = {'datasource': {
-            '_undef': {
-                'max_wait': 'nope', 'timeout': 'bug', 'retries': 'nonint'}}}
+        sys_cfg = {
+            "datasource": {
+                "_undef": {
+                    "max_wait": "nope",
+                    "timeout": "bug",
+                    "retries": "nonint",
+                }
+            }
+        }
         datasource = DataSource(sys_cfg, self.distro, self.paths)
         url_params = datasource.get_url_params()
-        expected = (datasource.url_max_wait, datasource.url_timeout,
-                    datasource.url_retries, datasource.url_sec_between_retries)
+        expected = (
+            datasource.url_max_wait,
+            datasource.url_timeout,
+            datasource.url_retries,
+            datasource.url_sec_between_retries,
+        )
         self.assertEqual(expected, url_params)
         logs = self.logs.getvalue()
         expected_logs = [
@@ -158,27 +202,28 @@ class TestDataSource(CiTestCase):
         for log in expected_logs:
             self.assertIn(log, logs)
 
-    @mock.patch('cloudinit.sources.net.find_fallback_nic')
+    @mock.patch("cloudinit.sources.net.find_fallback_nic")
     def test_fallback_interface_is_discovered(self, m_get_fallback_nic):
         """The fallback_interface is discovered via find_fallback_nic."""
-        m_get_fallback_nic.return_value = 'nic9'
-        self.assertEqual('nic9', self.datasource.fallback_interface)
+        m_get_fallback_nic.return_value = "nic9"
+        self.assertEqual("nic9", self.datasource.fallback_interface)
 
-    @mock.patch('cloudinit.sources.net.find_fallback_nic')
+    @mock.patch("cloudinit.sources.net.find_fallback_nic")
     def test_fallback_interface_logs_undiscovered(self, m_get_fallback_nic):
         """Log a warning when fallback_interface can not discover the nic."""
-        self.datasource._cloud_name = 'MySupahCloud'
+        self.datasource._cloud_name = "MySupahCloud"
         m_get_fallback_nic.return_value = None  # Couldn't discover nic
         self.assertIsNone(self.datasource.fallback_interface)
         self.assertEqual(
-            'WARNING: Did not find a fallback interface on MySupahCloud.\n',
-            self.logs.getvalue())
+            "WARNING: Did not find a fallback interface on MySupahCloud.\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.sources.net.find_fallback_nic')
+    @mock.patch("cloudinit.sources.net.find_fallback_nic")
     def test_wb_fallback_interface_is_cached(self, m_get_fallback_nic):
         """The fallback_interface is cached and won't be rediscovered."""
-        self.datasource._fallback_interface = 'nic10'
-        self.assertEqual('nic10', self.datasource.fallback_interface)
+        self.datasource._fallback_interface = "nic10"
+        self.assertEqual("nic10", self.datasource.fallback_interface)
         m_get_fallback_nic.assert_not_called()
 
     def test__get_data_unimplemented(self):
@@ -186,80 +231,95 @@ class TestDataSource(CiTestCase):
         with self.assertRaises(NotImplementedError) as context_manager:
             self.datasource.get_data()
         self.assertIn(
-            'Subclasses of DataSource must implement _get_data',
-            str(context_manager.exception))
+            "Subclasses of DataSource must implement _get_data",
+            str(context_manager.exception),
+        )
         datasource2 = InvalidDataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, self.paths)
+            self.sys_cfg, self.distro, self.paths
+        )
         with self.assertRaises(NotImplementedError) as context_manager:
             datasource2.get_data()
         self.assertIn(
-            'Subclasses of DataSource must implement _get_data',
-            str(context_manager.exception))
+            "Subclasses of DataSource must implement _get_data",
+            str(context_manager.exception),
+        )
 
     def test_get_data_calls_subclass__get_data(self):
         """Datasource.get_data uses the subclass' version of _get_data."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         self.assertTrue(datasource.get_data())
         self.assertEqual(
-            {'availability_zone': 'myaz',
-             'local-hostname': 'test-subclass-hostname',
-             'region': 'myregion'},
-            datasource.metadata)
-        self.assertEqual('userdata_raw', datasource.userdata_raw)
-        self.assertEqual('vendordata_raw', datasource.vendordata_raw)
+            {
+                "availability_zone": "myaz",
+                "local-hostname": "test-subclass-hostname",
+                "region": "myregion",
+            },
+            datasource.metadata,
+        )
+        self.assertEqual("userdata_raw", datasource.userdata_raw)
+        self.assertEqual("vendordata_raw", datasource.vendordata_raw)
 
     def test_get_hostname_strips_local_hostname_without_domain(self):
         """Datasource.get_hostname strips metadata local-hostname of domain."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         self.assertTrue(datasource.get_data())
         self.assertEqual(
-            'test-subclass-hostname', datasource.metadata['local-hostname'])
-        self.assertEqual('test-subclass-hostname', datasource.get_hostname())
-        datasource.metadata['local-hostname'] = 'hostname.my.domain.com'
-        self.assertEqual('hostname', datasource.get_hostname())
+            "test-subclass-hostname", datasource.metadata["local-hostname"]
+        )
+        self.assertEqual("test-subclass-hostname", datasource.get_hostname())
+        datasource.metadata["local-hostname"] = "hostname.my.domain.com"
+        self.assertEqual("hostname", datasource.get_hostname())
 
     def test_get_hostname_with_fqdn_returns_local_hostname_with_domain(self):
         """Datasource.get_hostname with fqdn set gets qualified hostname."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         self.assertTrue(datasource.get_data())
-        datasource.metadata['local-hostname'] = 'hostname.my.domain.com'
+        datasource.metadata["local-hostname"] = "hostname.my.domain.com"
         self.assertEqual(
-            'hostname.my.domain.com', datasource.get_hostname(fqdn=True))
+            "hostname.my.domain.com", datasource.get_hostname(fqdn=True)
+        )
 
     def test_get_hostname_without_metadata_uses_system_hostname(self):
         """Datasource.gethostname runs util.get_hostname when no metadata."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         self.assertEqual({}, datasource.metadata)
-        mock_fqdn = 'cloudinit.sources.util.get_fqdn_from_hosts'
-        with mock.patch('cloudinit.sources.util.get_hostname') as m_gethost:
+        mock_fqdn = "cloudinit.sources.util.get_fqdn_from_hosts"
+        with mock.patch("cloudinit.sources.util.get_hostname") as m_gethost:
             with mock.patch(mock_fqdn) as m_fqdn:
-                m_gethost.return_value = 'systemhostname.domain.com'
+                m_gethost.return_value = "systemhostname.domain.com"
                 m_fqdn.return_value = None  # No maching fqdn in /etc/hosts
-                self.assertEqual('systemhostname', datasource.get_hostname())
+                self.assertEqual("systemhostname", datasource.get_hostname())
                 self.assertEqual(
-                    'systemhostname.domain.com',
-                    datasource.get_hostname(fqdn=True))
+                    "systemhostname.domain.com",
+                    datasource.get_hostname(fqdn=True),
+                )
 
     def test_get_hostname_without_metadata_returns_none(self):
         """Datasource.gethostname returns None when metadata_only and no MD."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         self.assertEqual({}, datasource.metadata)
-        mock_fqdn = 'cloudinit.sources.util.get_fqdn_from_hosts'
-        with mock.patch('cloudinit.sources.util.get_hostname') as m_gethost:
+        mock_fqdn = "cloudinit.sources.util.get_fqdn_from_hosts"
+        with mock.patch("cloudinit.sources.util.get_hostname") as m_gethost:
             with mock.patch(mock_fqdn) as m_fqdn:
                 self.assertIsNone(datasource.get_hostname(metadata_only=True))
                 self.assertIsNone(
-                    datasource.get_hostname(fqdn=True, metadata_only=True))
+                    datasource.get_hostname(fqdn=True, metadata_only=True)
+                )
         self.assertEqual([], m_gethost.call_args_list)
         self.assertEqual([], m_fqdn.call_args_list)
 
@@ -267,78 +327,99 @@ class TestDataSource(CiTestCase):
         """Datasource.gethostname prefers /etc/hosts to util.get_hostname."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         self.assertEqual({}, datasource.metadata)
-        mock_fqdn = 'cloudinit.sources.util.get_fqdn_from_hosts'
-        with mock.patch('cloudinit.sources.util.get_hostname') as m_gethost:
+        mock_fqdn = "cloudinit.sources.util.get_fqdn_from_hosts"
+        with mock.patch("cloudinit.sources.util.get_hostname") as m_gethost:
             with mock.patch(mock_fqdn) as m_fqdn:
-                m_gethost.return_value = 'systemhostname.domain.com'
-                m_fqdn.return_value = 'fqdnhostname.domain.com'
-                self.assertEqual('fqdnhostname', datasource.get_hostname())
-                self.assertEqual('fqdnhostname.domain.com',
-                                 datasource.get_hostname(fqdn=True))
+                m_gethost.return_value = "systemhostname.domain.com"
+                m_fqdn.return_value = "fqdnhostname.domain.com"
+                self.assertEqual("fqdnhostname", datasource.get_hostname())
+                self.assertEqual(
+                    "fqdnhostname.domain.com",
+                    datasource.get_hostname(fqdn=True),
+                )
 
     def test_get_data_does_not_write_instance_data_on_failure(self):
         """get_data does not write INSTANCE_JSON_FILE on get_data False."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}),
-            get_data_retval=False)
+            self.sys_cfg,
+            self.distro,
+            Paths({"run_dir": tmp}),
+            get_data_retval=False,
+        )
         self.assertFalse(datasource.get_data())
         json_file = self.tmp_path(INSTANCE_JSON_FILE, tmp)
         self.assertFalse(
-            os.path.exists(json_file), 'Found unexpected file %s' % json_file)
+            os.path.exists(json_file), "Found unexpected file %s" % json_file
+        )
 
     def test_get_data_writes_json_instance_data_on_success(self):
         """get_data writes INSTANCE_JSON_FILE to run_dir as world readable."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         sys_info = {
             "python": "3.7",
-            "platform":
-                "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal",
-            "uname": ["Linux", "myhost", "5.4.0-24-generic", "SMP blah",
-                      "x86_64"],
-            "variant": "ubuntu", "dist": ["ubuntu", "20.04", "focal"]}
+            "platform": (
+                "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal"
+            ),
+            "uname": [
+                "Linux",
+                "myhost",
+                "5.4.0-24-generic",
+                "SMP blah",
+                "x86_64",
+            ],
+            "variant": "ubuntu",
+            "dist": ["ubuntu", "20.04", "focal"],
+        }
         with mock.patch("cloudinit.util.system_info", return_value=sys_info):
             datasource.get_data()
         json_file = self.tmp_path(INSTANCE_JSON_FILE, tmp)
         content = util.load_file(json_file)
         expected = {
-            'base64_encoded_keys': [],
-            'merged_cfg': REDACT_SENSITIVE_VALUE,
-            'sensitive_keys': ['merged_cfg'],
-            'sys_info': sys_info,
-            'v1': {
-                '_beta_keys': ['subplatform'],
-                'availability-zone': 'myaz',
-                'availability_zone': 'myaz',
-                'cloud-name': 'subclasscloudname',
-                'cloud_name': 'subclasscloudname',
-                'distro': 'ubuntu',
-                'distro_release': 'focal',
-                'distro_version': '20.04',
-                'instance-id': 'iid-datasource',
-                'instance_id': 'iid-datasource',
-                'local-hostname': 'test-subclass-hostname',
-                'local_hostname': 'test-subclass-hostname',
-                'kernel_release': '5.4.0-24-generic',
-                'machine': 'x86_64',
-                'platform': 'mytestsubclass',
-                'public_ssh_keys': [],
-                'python_version': '3.7',
-                'region': 'myregion',
-                'system_platform':
-                    'Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal',
-                'subplatform': 'unknown',
-                'variant': 'ubuntu'},
-            'ds': {
-
-                '_doc': EXPERIMENTAL_TEXT,
-                'meta_data': {'availability_zone': 'myaz',
-                              'local-hostname': 'test-subclass-hostname',
-                              'region': 'myregion'}}}
+            "base64_encoded_keys": [],
+            "merged_cfg": REDACT_SENSITIVE_VALUE,
+            "sensitive_keys": ["merged_cfg"],
+            "sys_info": sys_info,
+            "v1": {
+                "_beta_keys": ["subplatform"],
+                "availability-zone": "myaz",
+                "availability_zone": "myaz",
+                "cloud-name": "subclasscloudname",
+                "cloud_name": "subclasscloudname",
+                "distro": "ubuntu",
+                "distro_release": "focal",
+                "distro_version": "20.04",
+                "instance-id": "iid-datasource",
+                "instance_id": "iid-datasource",
+                "local-hostname": "test-subclass-hostname",
+                "local_hostname": "test-subclass-hostname",
+                "kernel_release": "5.4.0-24-generic",
+                "machine": "x86_64",
+                "platform": "mytestsubclass",
+                "public_ssh_keys": [],
+                "python_version": "3.7",
+                "region": "myregion",
+                "system_platform": (
+                    "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal"
+                ),
+                "subplatform": "unknown",
+                "variant": "ubuntu",
+            },
+            "ds": {
+                "_doc": EXPERIMENTAL_TEXT,
+                "meta_data": {
+                    "availability_zone": "myaz",
+                    "local-hostname": "test-subclass-hostname",
+                    "region": "myregion",
+                },
+            },
+        }
         self.assertEqual(expected, util.load_json(content))
         file_stat = os.stat(json_file)
         self.assertEqual(0o644, stat.S_IMODE(file_stat.st_mode))
@@ -348,63 +429,89 @@ class TestDataSource(CiTestCase):
         """get_data writes redacted content to public INSTANCE_JSON_FILE."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}),
+            self.sys_cfg,
+            self.distro,
+            Paths({"run_dir": tmp}),
             custom_metadata={
-                'availability_zone': 'myaz',
-                'local-hostname': 'test-subclass-hostname',
-                'region': 'myregion',
-                'some': {'security-credentials': {
-                    'cred1': 'sekret', 'cred2': 'othersekret'}}})
+                "availability_zone": "myaz",
+                "local-hostname": "test-subclass-hostname",
+                "region": "myregion",
+                "some": {
+                    "security-credentials": {
+                        "cred1": "sekret",
+                        "cred2": "othersekret",
+                    }
+                },
+            },
+        )
         self.assertCountEqual(
-            ('merged_cfg', 'security-credentials',),
-            datasource.sensitive_metadata_keys)
+            (
+                "merged_cfg",
+                "security-credentials",
+            ),
+            datasource.sensitive_metadata_keys,
+        )
         sys_info = {
             "python": "3.7",
-            "platform":
-                "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal",
-            "uname": ["Linux", "myhost", "5.4.0-24-generic", "SMP blah",
-                      "x86_64"],
-            "variant": "ubuntu", "dist": ["ubuntu", "20.04", "focal"]}
+            "platform": (
+                "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal"
+            ),
+            "uname": [
+                "Linux",
+                "myhost",
+                "5.4.0-24-generic",
+                "SMP blah",
+                "x86_64",
+            ],
+            "variant": "ubuntu",
+            "dist": ["ubuntu", "20.04", "focal"],
+        }
         with mock.patch("cloudinit.util.system_info", return_value=sys_info):
             datasource.get_data()
         json_file = self.tmp_path(INSTANCE_JSON_FILE, tmp)
         redacted = util.load_json(util.load_file(json_file))
         expected = {
-            'base64_encoded_keys': [],
-            'merged_cfg': REDACT_SENSITIVE_VALUE,
-            'sensitive_keys': [
-                'ds/meta_data/some/security-credentials', 'merged_cfg'],
-            'sys_info': sys_info,
-            'v1': {
-                '_beta_keys': ['subplatform'],
-                'availability-zone': 'myaz',
-                'availability_zone': 'myaz',
-                'cloud-name': 'subclasscloudname',
-                'cloud_name': 'subclasscloudname',
-                'distro': 'ubuntu',
-                'distro_release': 'focal',
-                'distro_version': '20.04',
-                'instance-id': 'iid-datasource',
-                'instance_id': 'iid-datasource',
-                'local-hostname': 'test-subclass-hostname',
-                'local_hostname': 'test-subclass-hostname',
-                'kernel_release': '5.4.0-24-generic',
-                'machine': 'x86_64',
-                'platform': 'mytestsubclass',
-                'public_ssh_keys': [],
-                'python_version': '3.7',
-                'region': 'myregion',
-                'system_platform':
-                    'Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal',
-                'subplatform': 'unknown',
-                'variant': 'ubuntu'},
-            'ds': {
-                '_doc': EXPERIMENTAL_TEXT,
-                'meta_data': {
-                    'availability_zone': 'myaz',
-                    'local-hostname': 'test-subclass-hostname',
-                    'region': 'myregion',
-                    'some': {'security-credentials': REDACT_SENSITIVE_VALUE}}}
+            "base64_encoded_keys": [],
+            "merged_cfg": REDACT_SENSITIVE_VALUE,
+            "sensitive_keys": [
+                "ds/meta_data/some/security-credentials",
+                "merged_cfg",
+            ],
+            "sys_info": sys_info,
+            "v1": {
+                "_beta_keys": ["subplatform"],
+                "availability-zone": "myaz",
+                "availability_zone": "myaz",
+                "cloud-name": "subclasscloudname",
+                "cloud_name": "subclasscloudname",
+                "distro": "ubuntu",
+                "distro_release": "focal",
+                "distro_version": "20.04",
+                "instance-id": "iid-datasource",
+                "instance_id": "iid-datasource",
+                "local-hostname": "test-subclass-hostname",
+                "local_hostname": "test-subclass-hostname",
+                "kernel_release": "5.4.0-24-generic",
+                "machine": "x86_64",
+                "platform": "mytestsubclass",
+                "public_ssh_keys": [],
+                "python_version": "3.7",
+                "region": "myregion",
+                "system_platform": (
+                    "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal"
+                ),
+                "subplatform": "unknown",
+                "variant": "ubuntu",
+            },
+            "ds": {
+                "_doc": EXPERIMENTAL_TEXT,
+                "meta_data": {
+                    "availability_zone": "myaz",
+                    "local-hostname": "test-subclass-hostname",
+                    "region": "myregion",
+                    "some": {"security-credentials": REDACT_SENSITIVE_VALUE},
+                },
+            },
         }
         self.assertCountEqual(expected, redacted)
         file_stat = os.stat(json_file)
@@ -416,71 +523,101 @@ class TestDataSource(CiTestCase):
         """
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}),
+            self.sys_cfg,
+            self.distro,
+            Paths({"run_dir": tmp}),
             custom_metadata={
-                'availability_zone': 'myaz',
-                'local-hostname': 'test-subclass-hostname',
-                'region': 'myregion',
-                'some': {'security-credentials': {
-                    'cred1': 'sekret', 'cred2': 'othersekret'}}})
+                "availability_zone": "myaz",
+                "local-hostname": "test-subclass-hostname",
+                "region": "myregion",
+                "some": {
+                    "security-credentials": {
+                        "cred1": "sekret",
+                        "cred2": "othersekret",
+                    }
+                },
+            },
+        )
         sys_info = {
             "python": "3.7",
-            "platform":
-                "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal",
-            "uname": ["Linux", "myhost", "5.4.0-24-generic", "SMP blah",
-                      "x86_64"],
-            "variant": "ubuntu", "dist": ["ubuntu", "20.04", "focal"]}
+            "platform": (
+                "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal"
+            ),
+            "uname": [
+                "Linux",
+                "myhost",
+                "5.4.0-24-generic",
+                "SMP blah",
+                "x86_64",
+            ],
+            "variant": "ubuntu",
+            "dist": ["ubuntu", "20.04", "focal"],
+        }
 
         self.assertCountEqual(
-            ('merged_cfg', 'security-credentials',),
-            datasource.sensitive_metadata_keys)
+            (
+                "merged_cfg",
+                "security-credentials",
+            ),
+            datasource.sensitive_metadata_keys,
+        )
         with mock.patch("cloudinit.util.system_info", return_value=sys_info):
             datasource.get_data()
         sensitive_json_file = self.tmp_path(INSTANCE_JSON_SENSITIVE_FILE, tmp)
         content = util.load_file(sensitive_json_file)
         expected = {
-            'base64_encoded_keys': [],
-            'merged_cfg': {
-                '_doc': (
-                    'Merged cloud-init system config from '
-                    '/etc/cloud/cloud.cfg and /etc/cloud/cloud.cfg.d/'
+            "base64_encoded_keys": [],
+            "merged_cfg": {
+                "_doc": (
+                    "Merged cloud-init system config from "
+                    "/etc/cloud/cloud.cfg and /etc/cloud/cloud.cfg.d/"
+                ),
+                "datasource": {"_undef": {"key1": False}},
+            },
+            "sensitive_keys": [
+                "ds/meta_data/some/security-credentials",
+                "merged_cfg",
+            ],
+            "sys_info": sys_info,
+            "v1": {
+                "_beta_keys": ["subplatform"],
+                "availability-zone": "myaz",
+                "availability_zone": "myaz",
+                "cloud-name": "subclasscloudname",
+                "cloud_name": "subclasscloudname",
+                "distro": "ubuntu",
+                "distro_release": "focal",
+                "distro_version": "20.04",
+                "instance-id": "iid-datasource",
+                "instance_id": "iid-datasource",
+                "kernel_release": "5.4.0-24-generic",
+                "local-hostname": "test-subclass-hostname",
+                "local_hostname": "test-subclass-hostname",
+                "machine": "x86_64",
+                "platform": "mytestsubclass",
+                "public_ssh_keys": [],
+                "python_version": "3.7",
+                "region": "myregion",
+                "subplatform": "unknown",
+                "system_platform": (
+                    "Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal"
                 ),
-                'datasource': {'_undef': {'key1': False}}},
-            'sensitive_keys': [
-                'ds/meta_data/some/security-credentials', 'merged_cfg'],
-            'sys_info': sys_info,
-            'v1': {
-                '_beta_keys': ['subplatform'],
-                'availability-zone': 'myaz',
-                'availability_zone': 'myaz',
-                'cloud-name': 'subclasscloudname',
-                'cloud_name': 'subclasscloudname',
-                'distro': 'ubuntu',
-                'distro_release': 'focal',
-                'distro_version': '20.04',
-                'instance-id': 'iid-datasource',
-                'instance_id': 'iid-datasource',
-                'kernel_release': '5.4.0-24-generic',
-                'local-hostname': 'test-subclass-hostname',
-                'local_hostname': 'test-subclass-hostname',
-                'machine': 'x86_64',
-                'platform': 'mytestsubclass',
-                'public_ssh_keys': [],
-                'python_version': '3.7',
-                'region': 'myregion',
-                'subplatform': 'unknown',
-                'system_platform':
-                    'Linux-5.4.0-24-generic-x86_64-with-Ubuntu-20.04-focal',
-                'variant': 'ubuntu'},
-            'ds': {
-                '_doc': EXPERIMENTAL_TEXT,
-                'meta_data': {
-                    'availability_zone': 'myaz',
-                    'local-hostname': 'test-subclass-hostname',
-                    'region': 'myregion',
-                    'some': {
-                        'security-credentials':
-                            {'cred1': 'sekret', 'cred2': 'othersekret'}}}}
+                "variant": "ubuntu",
+            },
+            "ds": {
+                "_doc": EXPERIMENTAL_TEXT,
+                "meta_data": {
+                    "availability_zone": "myaz",
+                    "local-hostname": "test-subclass-hostname",
+                    "region": "myregion",
+                    "some": {
+                        "security-credentials": {
+                            "cred1": "sekret",
+                            "cred2": "othersekret",
+                        }
+                    },
+                },
+            },
         }
         self.assertCountEqual(expected, util.load_json(content))
         file_stat = os.stat(sensitive_json_file)
@@ -491,69 +628,81 @@ class TestDataSource(CiTestCase):
         """get_data warns unserializable content in INSTANCE_JSON_FILE."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}),
-            custom_metadata={'key1': 'val1', 'key2': {'key2.1': self.paths}})
+            self.sys_cfg,
+            self.distro,
+            Paths({"run_dir": tmp}),
+            custom_metadata={"key1": "val1", "key2": {"key2.1": self.paths}},
+        )
         datasource.get_data()
         json_file = self.tmp_path(INSTANCE_JSON_FILE, tmp)
         content = util.load_file(json_file)
         expected_metadata = {
-            'key1': 'val1',
-            'key2': {
-                'key2.1': "Warning: redacted unserializable type <class"
-                          " 'cloudinit.helpers.Paths'>"}}
+            "key1": "val1",
+            "key2": {
+                "key2.1": (
+                    "Warning: redacted unserializable type <class"
+                    " 'cloudinit.helpers.Paths'>"
+                )
+            },
+        }
         instance_json = util.load_json(content)
-        self.assertEqual(
-            expected_metadata, instance_json['ds']['meta_data'])
+        self.assertEqual(expected_metadata, instance_json["ds"]["meta_data"])
 
     def test_persist_instance_data_writes_ec2_metadata_when_set(self):
         """When ec2_metadata class attribute is set, persist to json."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         datasource.ec2_metadata = UNSET
         datasource.get_data()
         json_file = self.tmp_path(INSTANCE_JSON_FILE, tmp)
         instance_data = util.load_json(util.load_file(json_file))
-        self.assertNotIn('ec2_metadata', instance_data['ds'])
-        datasource.ec2_metadata = {'ec2stuff': 'is good'}
+        self.assertNotIn("ec2_metadata", instance_data["ds"])
+        datasource.ec2_metadata = {"ec2stuff": "is good"}
         datasource.persist_instance_data()
         instance_data = util.load_json(util.load_file(json_file))
         self.assertEqual(
-            {'ec2stuff': 'is good'},
-            instance_data['ds']['ec2_metadata'])
+            {"ec2stuff": "is good"}, instance_data["ds"]["ec2_metadata"]
+        )
 
     def test_persist_instance_data_writes_network_json_when_set(self):
         """When network_data.json class attribute is set, persist to json."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}))
+            self.sys_cfg, self.distro, Paths({"run_dir": tmp})
+        )
         datasource.get_data()
         json_file = self.tmp_path(INSTANCE_JSON_FILE, tmp)
         instance_data = util.load_json(util.load_file(json_file))
-        self.assertNotIn('network_json', instance_data['ds'])
-        datasource.network_json = {'network_json': 'is good'}
+        self.assertNotIn("network_json", instance_data["ds"])
+        datasource.network_json = {"network_json": "is good"}
         datasource.persist_instance_data()
         instance_data = util.load_json(util.load_file(json_file))
         self.assertEqual(
-            {'network_json': 'is good'},
-            instance_data['ds']['network_json'])
+            {"network_json": "is good"}, instance_data["ds"]["network_json"]
+        )
 
     def test_get_data_base64encodes_unserializable_bytes(self):
         """On py3, get_data base64encodes any unserializable content."""
         tmp = self.tmp_dir()
         datasource = DataSourceTestSubclassNet(
-            self.sys_cfg, self.distro, Paths({'run_dir': tmp}),
-            custom_metadata={'key1': 'val1', 'key2': {'key2.1': b'\x123'}})
+            self.sys_cfg,
+            self.distro,
+            Paths({"run_dir": tmp}),
+            custom_metadata={"key1": "val1", "key2": {"key2.1": b"\x123"}},
+        )
         self.assertTrue(datasource.get_data())
         json_file = self.tmp_path(INSTANCE_JSON_FILE, tmp)
         content = util.load_file(json_file)
         instance_json = util.load_json(content)
         self.assertCountEqual(
-            ['ds/meta_data/key2/key2.1'],
-            instance_json['base64_encoded_keys'])
+            ["ds/meta_data/key2/key2.1"], instance_json["base64_encoded_keys"]
+        )
         self.assertEqual(
-            {'key1': 'val1', 'key2': {'key2.1': 'EjM='}},
-            instance_json['ds']['meta_data'])
+            {"key1": "val1", "key2": {"key2.1": "EjM="}},
+            instance_json["ds"]["meta_data"],
+        )
 
     def test_get_hostname_subclass_support(self):
         """Validate get_hostname signature on all subclasses of DataSource."""
@@ -561,23 +710,24 @@ class TestDataSource(CiTestCase):
         # Import all DataSource subclasses so we can inspect them.
         modules = util.find_modules(os.path.dirname(os.path.dirname(__file__)))
         for _loc, name in modules.items():
-            mod_locs, _ = importer.find_module(name, ['cloudinit.sources'], [])
+            mod_locs, _ = importer.find_module(name, ["cloudinit.sources"], [])
             if mod_locs:
                 importer.import_module(mod_locs[0])
         for child in DataSource.__subclasses__():
-            if 'Test' in child.dsname:
+            if "Test" in child.dsname:
                 continue
             self.assertEqual(
                 base_args,
                 inspect.getfullargspec(child.get_hostname),
-                '%s does not implement DataSource.get_hostname params'
-                % child)
+                "%s does not implement DataSource.get_hostname params" % child,
+            )
             for grandchild in child.__subclasses__():
                 self.assertEqual(
                     base_args,
                     inspect.getfullargspec(grandchild.get_hostname),
-                    '%s does not implement DataSource.get_hostname params'
-                    % grandchild)
+                    "%s does not implement DataSource.get_hostname params"
+                    % grandchild,
+                )
 
     def test_clear_cached_attrs_resets_cached_attr_class_attributes(self):
         """Class attributes listed in cached_attr_defaults are reset."""
@@ -598,7 +748,7 @@ class TestDataSource(CiTestCase):
         for attr, _ in self.datasource.cached_attr_defaults:
             setattr(self.datasource, attr, count)
             count += 1
-        self.datasource._dirty_cache = False   # Fake clean cache
+        self.datasource._dirty_cache = False  # Fake clean cache
         self.datasource.clear_cached_attrs()
         count = 0
         for attr, _ in self.datasource.cached_attr_defaults:
@@ -609,163 +759,194 @@ class TestDataSource(CiTestCase):
         """Skip any cached_attr_defaults which aren't class attributes."""
         self.datasource._dirty_cache = True
         self.datasource.clear_cached_attrs()
-        for attr in ('ec2_metadata', 'network_json'):
+        for attr in ("ec2_metadata", "network_json"):
             self.assertFalse(hasattr(self.datasource, attr))
 
     def test_clear_cached_attrs_of_custom_attrs(self):
         """Custom attr_values can be passed to clear_cached_attrs."""
         self.datasource._dirty_cache = True
         cached_attr_name = self.datasource.cached_attr_defaults[0][0]
-        setattr(self.datasource, cached_attr_name, 'himom')
-        self.datasource.myattr = 'orig'
+        setattr(self.datasource, cached_attr_name, "himom")
+        self.datasource.myattr = "orig"
         self.datasource.clear_cached_attrs(
-            attr_defaults=(('myattr', 'updated'),))
-        self.assertEqual('himom', getattr(self.datasource, cached_attr_name))
-        self.assertEqual('updated', self.datasource.myattr)
-
-    @mock.patch.dict(DataSource.default_update_events, {
-        EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}})
-    @mock.patch.dict(DataSource.supported_update_events, {
-        EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}})
+            attr_defaults=(("myattr", "updated"),)
+        )
+        self.assertEqual("himom", getattr(self.datasource, cached_attr_name))
+        self.assertEqual("updated", self.datasource.myattr)
+
+    @mock.patch.dict(
+        DataSource.default_update_events,
+        {EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}},
+    )
+    @mock.patch.dict(
+        DataSource.supported_update_events,
+        {EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}},
+    )
     def test_update_metadata_only_acts_on_supported_update_events(self):
         """update_metadata_if_supported wont get_data on unsupported events."""
         self.assertEqual(
             {EventScope.NETWORK: set([EventType.BOOT_NEW_INSTANCE])},
-            self.datasource.default_update_events
+            self.datasource.default_update_events,
         )
 
         def fake_get_data():
-            raise Exception('get_data should not be called')
+            raise Exception("get_data should not be called")
 
         self.datasource.get_data = fake_get_data
         self.assertFalse(
             self.datasource.update_metadata_if_supported(
-                source_event_types=[EventType.BOOT]))
+                source_event_types=[EventType.BOOT]
+            )
+        )
 
-    @mock.patch.dict(DataSource.supported_update_events, {
-        EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}})
+    @mock.patch.dict(
+        DataSource.supported_update_events,
+        {EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}},
+    )
     def test_update_metadata_returns_true_on_supported_update_event(self):
         """update_metadata_if_supported returns get_data on supported events"""
+
         def fake_get_data():
             return True
 
         self.datasource.get_data = fake_get_data
-        self.datasource._network_config = 'something'
+        self.datasource._network_config = "something"
         self.datasource._dirty_cache = True
         self.assertTrue(
             self.datasource.update_metadata_if_supported(
                 source_event_types=[
-                    EventType.BOOT, EventType.BOOT_NEW_INSTANCE]))
+                    EventType.BOOT,
+                    EventType.BOOT_NEW_INSTANCE,
+                ]
+            )
+        )
         self.assertEqual(UNSET, self.datasource._network_config)
 
         self.assertIn(
             "DEBUG: Update datasource metadata and network config due to"
             " events: boot-new-instance",
-            self.logs.getvalue()
+            self.logs.getvalue(),
         )
 
 
 class TestRedactSensitiveData(CiTestCase):
-
     def test_redact_sensitive_data_noop_when_no_sensitive_keys_present(self):
         """When sensitive_keys is absent or empty from metadata do nothing."""
-        md = {'my': 'data'}
+        md = {"my": "data"}
         self.assertEqual(
-            md, redact_sensitive_keys(md, redact_value='redacted'))
-        md['sensitive_keys'] = []
+            md, redact_sensitive_keys(md, redact_value="redacted")
+        )
+        md["sensitive_keys"] = []
         self.assertEqual(
-            md, redact_sensitive_keys(md, redact_value='redacted'))
+            md, redact_sensitive_keys(md, redact_value="redacted")
+        )
 
     def test_redact_sensitive_data_redacts_exact_match_name(self):
         """Only exact matched sensitive_keys are redacted from metadata."""
-        md = {'sensitive_keys': ['md/secure'],
-              'md': {'secure': 's3kr1t', 'insecure': 'publik'}}
+        md = {
+            "sensitive_keys": ["md/secure"],
+            "md": {"secure": "s3kr1t", "insecure": "publik"},
+        }
         secure_md = copy.deepcopy(md)
-        secure_md['md']['secure'] = 'redacted'
+        secure_md["md"]["secure"] = "redacted"
         self.assertEqual(
-            secure_md,
-            redact_sensitive_keys(md, redact_value='redacted'))
+            secure_md, redact_sensitive_keys(md, redact_value="redacted")
+        )
 
     def test_redact_sensitive_data_does_redacts_with_default_string(self):
         """When redact_value is absent, REDACT_SENSITIVE_VALUE is used."""
-        md = {'sensitive_keys': ['md/secure'],
-              'md': {'secure': 's3kr1t', 'insecure': 'publik'}}
+        md = {
+            "sensitive_keys": ["md/secure"],
+            "md": {"secure": "s3kr1t", "insecure": "publik"},
+        }
         secure_md = copy.deepcopy(md)
-        secure_md['md']['secure'] = 'redacted for non-root user'
-        self.assertEqual(
-            secure_md,
-            redact_sensitive_keys(md))
+        secure_md["md"]["secure"] = "redacted for non-root user"
+        self.assertEqual(secure_md, redact_sensitive_keys(md))
 
 
 class TestCanonicalCloudID(CiTestCase):
-
     def test_cloud_id_returns_platform_on_unknowns(self):
         """When region and cloud_name are unknown, return platform."""
         self.assertEqual(
-            'platform',
-            canonical_cloud_id(cloud_name=METADATA_UNKNOWN,
-                               region=METADATA_UNKNOWN,
-                               platform='platform'))
+            "platform",
+            canonical_cloud_id(
+                cloud_name=METADATA_UNKNOWN,
+                region=METADATA_UNKNOWN,
+                platform="platform",
+            ),
+        )
 
     def test_cloud_id_returns_platform_on_none(self):
         """When region and cloud_name are unknown, return platform."""
         self.assertEqual(
-            'platform',
-            canonical_cloud_id(cloud_name=None,
-                               region=None,
-                               platform='platform'))
+            "platform",
+            canonical_cloud_id(
+                cloud_name=None, region=None, platform="platform"
+            ),
+        )
 
     def test_cloud_id_returns_cloud_name_on_unknown_region(self):
         """When region is unknown, return cloud_name."""
         for region in (None, METADATA_UNKNOWN):
             self.assertEqual(
-                'cloudname',
-                canonical_cloud_id(cloud_name='cloudname',
-                                   region=region,
-                                   platform='platform'))
+                "cloudname",
+                canonical_cloud_id(
+                    cloud_name="cloudname", region=region, platform="platform"
+                ),
+            )
 
     def test_cloud_id_returns_platform_on_unknown_cloud_name(self):
         """When region is set but cloud_name is unknown return cloud_name."""
         self.assertEqual(
-            'platform',
-            canonical_cloud_id(cloud_name=METADATA_UNKNOWN,
-                               region='region',
-                               platform='platform'))
+            "platform",
+            canonical_cloud_id(
+                cloud_name=METADATA_UNKNOWN,
+                region="region",
+                platform="platform",
+            ),
+        )
 
     def test_cloud_id_aws_based_on_region_and_cloud_name(self):
         """When cloud_name is aws, return proper cloud-id based on region."""
         self.assertEqual(
-            'aws-china',
-            canonical_cloud_id(cloud_name='aws',
-                               region='cn-north-1',
-                               platform='platform'))
+            "aws-china",
+            canonical_cloud_id(
+                cloud_name="aws", region="cn-north-1", platform="platform"
+            ),
+        )
         self.assertEqual(
-            'aws',
-            canonical_cloud_id(cloud_name='aws',
-                               region='us-east-1',
-                               platform='platform'))
+            "aws",
+            canonical_cloud_id(
+                cloud_name="aws", region="us-east-1", platform="platform"
+            ),
+        )
         self.assertEqual(
-            'aws-gov',
-            canonical_cloud_id(cloud_name='aws',
-                               region='us-gov-1',
-                               platform='platform'))
+            "aws-gov",
+            canonical_cloud_id(
+                cloud_name="aws", region="us-gov-1", platform="platform"
+            ),
+        )
         self.assertEqual(  # Overrideen non-aws cloud_name is returned
-            '!aws',
-            canonical_cloud_id(cloud_name='!aws',
-                               region='us-gov-1',
-                               platform='platform'))
+            "!aws",
+            canonical_cloud_id(
+                cloud_name="!aws", region="us-gov-1", platform="platform"
+            ),
+        )
 
     def test_cloud_id_azure_based_on_region_and_cloud_name(self):
         """Report cloud-id when cloud_name is azure and region is in china."""
         self.assertEqual(
-            'azure-china',
-            canonical_cloud_id(cloud_name='azure',
-                               region='chinaeast',
-                               platform='platform'))
+            "azure-china",
+            canonical_cloud_id(
+                cloud_name="azure", region="chinaeast", platform="platform"
+            ),
+        )
         self.assertEqual(
-            'azure',
-            canonical_cloud_id(cloud_name='azure',
-                               region='!chinaeast',
-                               platform='platform'))
+            "azure",
+            canonical_cloud_id(
+                cloud_name="azure", region="!chinaeast", platform="platform"
+            ),
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_lxd.py b/tests/unittests/sources/test_lxd.py
index a6e51f3b..ad1508a0 100644
--- a/tests/unittests/sources/test_lxd.py
+++ b/tests/unittests/sources/test_lxd.py
@@ -1,18 +1,19 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from collections import namedtuple
-from copy import deepcopy
 import json
 import re
 import stat
+from collections import namedtuple
+from copy import deepcopy
 from unittest import mock
-import yaml
 
 import pytest
+import yaml
+
+from cloudinit.sources import UNSET
+from cloudinit.sources import DataSourceLXD as lxd
+from cloudinit.sources import InvalidMetaDataException
 
-from cloudinit.sources import (
-    DataSourceLXD as lxd, InvalidMetaDataException, UNSET
-)
 DS_PATH = "cloudinit.sources.DataSourceLXD."
 
 
@@ -23,10 +24,11 @@ NETWORK_V1 = {
     "version": 1,
     "config": [
         {
-            "type": "physical", "name": "eth0",
-            "subnets": [{"type": "dhcp", "control": "auto"}]
+            "type": "physical",
+            "name": "eth0",
+            "subnets": [{"type": "dhcp", "control": "auto"}],
         }
-    ]
+    ],
 }
 
 
@@ -43,12 +45,10 @@ LXD_V1_METADATA = {
     "user-data": "#cloud-config\npackages: [sl]\n",
     "vendor-data": "#cloud-config\nruncmd: ['echo vendor-data']\n",
     "config": {
-        "user.user-data":
-            "instance-id: my-lxc\nlocal-hostname: my-lxc\n\n",
-        "user.vendor-data":
-            "#cloud-config\nruncmd: ['echo vendor-data']\n",
+        "user.user-data": "instance-id: my-lxc\nlocal-hostname: my-lxc\n\n",
+        "user.vendor-data": "#cloud-config\nruncmd: ['echo vendor-data']\n",
         "user.network-config": yaml.safe_dump(NETWORK_V1),
-    }
+    },
 }
 
 
@@ -76,9 +76,9 @@ def lxd_ds(request, paths, lxd_metadata):
 
 
 class TestGenerateFallbackNetworkConfig:
-
     @pytest.mark.parametrize(
-        "uname_machine,systemd_detect_virt,expected", (
+        "uname_machine,systemd_detect_virt,expected",
+        (
             # None for systemd_detect_virt returns None from which
             ({}, None, NETWORK_V1),
             ({}, None, NETWORK_V1),
@@ -86,8 +86,8 @@ class TestGenerateFallbackNetworkConfig:
             # `uname -m` on kvm determines devname
             ("x86_64", "kvm\n", _add_network_v1_device("enp5s0")),
             ("ppc64le", "kvm\n", _add_network_v1_device("enp0s5")),
-            ("s390x", "kvm\n", _add_network_v1_device("enc9"))
-        )
+            ("s390x", "kvm\n", _add_network_v1_device("enc9")),
+        ),
     )
     @mock.patch(DS_PATH + "util.system_info")
     @mock.patch(DS_PATH + "subp.subp")
@@ -145,11 +145,12 @@ class TestDataSourceLXD:
 
 class TestIsPlatformViable:
     @pytest.mark.parametrize(
-        "exists,lstat_mode,expected", (
+        "exists,lstat_mode,expected",
+        (
             (False, None, False),
             (True, stat.S_IFREG, False),
             (True, stat.S_IFSOCK, True),
-        )
+        ),
     )
     @mock.patch(DS_PATH + "os.lstat")
     @mock.patch(DS_PATH + "os.path.exists")
@@ -169,7 +170,8 @@ class TestIsPlatformViable:
 
 class TestReadMetadata:
     @pytest.mark.parametrize(
-        "url_responses,expected,logs", (
+        "url_responses,expected,logs",
+        (
             (  # Assert non-JSON format from config route
                 {
                     "http://lxd/1.0/meta-data": "local-hostname: md\n",
@@ -178,31 +180,38 @@ class TestReadMetadata:
                 InvalidMetaDataException(
                     "Unable to determine cloud-init config from"
                     " http://lxd/1.0/config. Expected JSON but found:"
-                    " [NOT_JSON"),
-                ["[GET] [HTTP:200] http://lxd/1.0/meta-data",
-                 "[GET] [HTTP:200] http://lxd/1.0/config"],
+                    " [NOT_JSON"
+                ),
+                [
+                    "[GET] [HTTP:200] http://lxd/1.0/meta-data",
+                    "[GET] [HTTP:200] http://lxd/1.0/config",
+                ],
             ),
-            (   # Assert success on just meta-data
+            (  # Assert success on just meta-data
                 {
                     "http://lxd/1.0/meta-data": "local-hostname: md\n",
                     "http://lxd/1.0/config": "[]",
                 },
                 {
                     "_metadata_api_version": lxd.LXD_SOCKET_API_VERSION,
-                    "config": {}, "meta-data": "local-hostname: md\n"
+                    "config": {},
+                    "meta-data": "local-hostname: md\n",
                 },
-                ["[GET] [HTTP:200] http://lxd/1.0/meta-data",
-                 "[GET] [HTTP:200] http://lxd/1.0/config"],
+                [
+                    "[GET] [HTTP:200] http://lxd/1.0/meta-data",
+                    "[GET] [HTTP:200] http://lxd/1.0/config",
+                ],
             ),
-            (   # Assert 404s for config routes log skipping
+            (  # Assert 404s for config routes log skipping
                 {
                     "http://lxd/1.0/meta-data": "local-hostname: md\n",
-                    "http://lxd/1.0/config":
+                    "http://lxd/1.0/config": (
                         '["/1.0/config/user.custom1",'
                         ' "/1.0/config/user.meta-data",'
                         ' "/1.0/config/user.network-config",'
                         ' "/1.0/config/user.user-data",'
-                        ' "/1.0/config/user.vendor-data"]',
+                        ' "/1.0/config/user.vendor-data"]'
+                    ),
                     "http://lxd/1.0/config/user.custom1": "custom1",
                     "http://lxd/1.0/config/user.meta-data": "",  # 404
                     "http://lxd/1.0/config/user.network-config": "net-config",
@@ -212,7 +221,7 @@ class TestReadMetadata:
                 {
                     "_metadata_api_version": lxd.LXD_SOCKET_API_VERSION,
                     "config": {
-                        "user.custom1": "custom1",   # Not promoted
+                        "user.custom1": "custom1",  # Not promoted
                         "user.network-config": "net-config",
                     },
                     "meta-data": "local-hostname: md\n",
@@ -231,15 +240,16 @@ class TestReadMetadata:
                     " http://lxd/1.0/config/user.network-config",
                 ],
             ),
-            (   # Assert all CONFIG_KEY_ALIASES promoted to top-level keys
+            (  # Assert all CONFIG_KEY_ALIASES promoted to top-level keys
                 {
                     "http://lxd/1.0/meta-data": "local-hostname: md\n",
-                    "http://lxd/1.0/config":
+                    "http://lxd/1.0/config": (
                         '["/1.0/config/user.custom1",'
                         ' "/1.0/config/user.meta-data",'
                         ' "/1.0/config/user.network-config",'
                         ' "/1.0/config/user.user-data",'
-                        ' "/1.0/config/user.vendor-data"]',
+                        ' "/1.0/config/user.vendor-data"]'
+                    ),
                     "http://lxd/1.0/config/user.custom1": "custom1",
                     "http://lxd/1.0/config/user.meta-data": "meta-data",
                     "http://lxd/1.0/config/user.network-config": "net-config",
@@ -249,7 +259,7 @@ class TestReadMetadata:
                 {
                     "_metadata_api_version": lxd.LXD_SOCKET_API_VERSION,
                     "config": {
-                        "user.custom1": "custom1",   # Not promoted
+                        "user.custom1": "custom1",  # Not promoted
                         "user.meta-data": "meta-data",
                         "user.network-config": "net-config",
                         "user.user-data": "user-data",
@@ -271,31 +281,38 @@ class TestReadMetadata:
                     "[GET] [HTTP:200] http://lxd/1.0/config/user.vendor-data",
                 ],
             ),
-            (   # Assert cloud-init.* config key values prefered over user.*
+            (  # Assert cloud-init.* config key values prefered over user.*
                 {
                     "http://lxd/1.0/meta-data": "local-hostname: md\n",
-                    "http://lxd/1.0/config":
+                    "http://lxd/1.0/config": (
                         '["/1.0/config/user.meta-data",'
                         ' "/1.0/config/user.network-config",'
                         ' "/1.0/config/user.user-data",'
                         ' "/1.0/config/user.vendor-data",'
                         ' "/1.0/config/cloud-init.network-config",'
                         ' "/1.0/config/cloud-init.user-data",'
-                        ' "/1.0/config/cloud-init.vendor-data"]',
+                        ' "/1.0/config/cloud-init.vendor-data"]'
+                    ),
                     "http://lxd/1.0/config/user.meta-data": "user.meta-data",
-                    "http://lxd/1.0/config/user.network-config":
-                        "user.network-config",
+                    "http://lxd/1.0/config/user.network-config": (
+                        "user.network-config"
+                    ),
                     "http://lxd/1.0/config/user.user-data": "user.user-data",
-                    "http://lxd/1.0/config/user.vendor-data":
-                        "user.vendor-data",
-                    "http://lxd/1.0/config/cloud-init.meta-data":
-                        "cloud-init.meta-data",
-                    "http://lxd/1.0/config/cloud-init.network-config":
-                        "cloud-init.network-config",
-                    "http://lxd/1.0/config/cloud-init.user-data":
-                        "cloud-init.user-data",
-                    "http://lxd/1.0/config/cloud-init.vendor-data":
-                        "cloud-init.vendor-data",
+                    "http://lxd/1.0/config/user.vendor-data": (
+                        "user.vendor-data"
+                    ),
+                    "http://lxd/1.0/config/cloud-init.meta-data": (
+                        "cloud-init.meta-data"
+                    ),
+                    "http://lxd/1.0/config/cloud-init.network-config": (
+                        "cloud-init.network-config"
+                    ),
+                    "http://lxd/1.0/config/cloud-init.user-data": (
+                        "cloud-init.user-data"
+                    ),
+                    "http://lxd/1.0/config/cloud-init.vendor-data": (
+                        "cloud-init.vendor-data"
+                    ),
                 },
                 {
                     "_metadata_api_version": lxd.LXD_SOCKET_API_VERSION,
@@ -304,11 +321,11 @@ class TestReadMetadata:
                         "user.network-config": "user.network-config",
                         "user.user-data": "user.user-data",
                         "user.vendor-data": "user.vendor-data",
-                        "cloud-init.network-config":
-                            "cloud-init.network-config",
+                        "cloud-init.network-config": (
+                            "cloud-init.network-config"
+                        ),
                         "cloud-init.user-data": "cloud-init.user-data",
-                        "cloud-init.vendor-data":
-                            "cloud-init.vendor-data",
+                        "cloud-init.vendor-data": "cloud-init.vendor-data",
                     },
                     "meta-data": "local-hostname: md\n",
                     "network-config": "cloud-init.network-config",
@@ -337,9 +354,9 @@ class TestReadMetadata:
                     " cloud-init.vendor-data value.",
                 ],
             ),
-        )
+        ),
     )
-    @mock.patch.object(lxd.requests.Session, 'get')
+    @mock.patch.object(lxd.requests.Session, "get")
     def test_read_metadata_handles_unexpected_content_or_http_status(
         self, session_get, url_responses, expected, logs, caplog
     ):
@@ -348,7 +365,7 @@ class TestReadMetadata:
         def fake_get(url):
             """Mock Response json, ok, status_code, text from url_responses."""
             m_resp = mock.MagicMock()
-            content = url_responses.get(url, '')
+            content = url_responses.get(url, "")
             m_resp.json.side_effect = lambda: json.loads(content)
             if content:
                 mock_ok = mock.PropertyMock(return_value=True)
@@ -373,4 +390,5 @@ class TestReadMetadata:
         for log in logs:
             assert log in caplogs
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_maas.py b/tests/unittests/sources/test_maas.py
index 34b79587..e95ba374 100644
--- a/tests/unittests/sources/test_maas.py
+++ b/tests/unittests/sources/test_maas.py
@@ -1,19 +1,19 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from copy import copy
 import os
 import shutil
 import tempfile
-import yaml
+from copy import copy
 from unittest import mock
 
-from cloudinit.sources import DataSourceMAAS
+import yaml
+
 from cloudinit import url_helper
+from cloudinit.sources import DataSourceMAAS
 from tests.unittests.helpers import CiTestCase, populate_dir
 
 
 class TestMAASDataSource(CiTestCase):
-
     def setUp(self):
         super(TestMAASDataSource, self).setUp()
         # Make a temp directoy for tests to use.
@@ -23,11 +23,13 @@ class TestMAASDataSource(CiTestCase):
     def test_seed_dir_valid(self):
         """Verify a valid seeddir is read as such."""
 
-        userdata = b'valid01-userdata'
-        data = {'meta-data/instance-id': 'i-valid01',
-                'meta-data/local-hostname': 'valid01-hostname',
-                'user-data': userdata,
-                'public-keys': 'ssh-rsa AAAAB3Nz...aC1yc2E= keyname'}
+        userdata = b"valid01-userdata"
+        data = {
+            "meta-data/instance-id": "i-valid01",
+            "meta-data/local-hostname": "valid01-hostname",
+            "user-data": userdata,
+            "public-keys": "ssh-rsa AAAAB3Nz...aC1yc2E= keyname",
+        }
 
         my_d = os.path.join(self.tmp, "valid")
         populate_dir(my_d, data)
@@ -35,20 +37,23 @@ class TestMAASDataSource(CiTestCase):
         ud, md, vd = DataSourceMAAS.read_maas_seed_dir(my_d)
 
         self.assertEqual(userdata, ud)
-        for key in ('instance-id', 'local-hostname'):
+        for key in ("instance-id", "local-hostname"):
             self.assertEqual(data["meta-data/" + key], md[key])
 
         # verify that 'userdata' is not returned as part of the metadata
-        self.assertFalse(('user-data' in md))
+        self.assertFalse(("user-data" in md))
         self.assertIsNone(vd)
 
     def test_seed_dir_valid_extra(self):
         """Verify extra files do not affect seed_dir validity."""
 
-        userdata = b'valid-extra-userdata'
-        data = {'meta-data/instance-id': 'i-valid-extra',
-                'meta-data/local-hostname': 'valid-extra-hostname',
-                'user-data': userdata, 'foo': 'bar'}
+        userdata = b"valid-extra-userdata"
+        data = {
+            "meta-data/instance-id": "i-valid-extra",
+            "meta-data/local-hostname": "valid-extra-hostname",
+            "user-data": userdata,
+            "foo": "bar",
+        }
 
         my_d = os.path.join(self.tmp, "valid_extra")
         populate_dir(my_d, data)
@@ -56,62 +61,77 @@ class TestMAASDataSource(CiTestCase):
         ud, md, _vd = DataSourceMAAS.read_maas_seed_dir(my_d)
 
         self.assertEqual(userdata, ud)
-        for key in ('instance-id', 'local-hostname'):
-            self.assertEqual(data['meta-data/' + key], md[key])
+        for key in ("instance-id", "local-hostname"):
+            self.assertEqual(data["meta-data/" + key], md[key])
 
         # additional files should not just appear as keys in metadata atm
-        self.assertFalse(('foo' in md))
+        self.assertFalse(("foo" in md))
 
     def test_seed_dir_invalid(self):
         """Verify that invalid seed_dir raises MAASSeedDirMalformed."""
 
-        valid = {'instance-id': 'i-instanceid',
-                 'local-hostname': 'test-hostname', 'user-data': ''}
+        valid = {
+            "instance-id": "i-instanceid",
+            "local-hostname": "test-hostname",
+            "user-data": "",
+        }
 
         my_based = os.path.join(self.tmp, "valid_extra")
 
         # missing 'userdata' file
         my_d = "%s-01" % my_based
         invalid_data = copy(valid)
-        del invalid_data['local-hostname']
+        del invalid_data["local-hostname"]
         populate_dir(my_d, invalid_data)
-        self.assertRaises(DataSourceMAAS.MAASSeedDirMalformed,
-                          DataSourceMAAS.read_maas_seed_dir, my_d)
+        self.assertRaises(
+            DataSourceMAAS.MAASSeedDirMalformed,
+            DataSourceMAAS.read_maas_seed_dir,
+            my_d,
+        )
 
         # missing 'instance-id'
         my_d = "%s-02" % my_based
         invalid_data = copy(valid)
-        del invalid_data['instance-id']
+        del invalid_data["instance-id"]
         populate_dir(my_d, invalid_data)
-        self.assertRaises(DataSourceMAAS.MAASSeedDirMalformed,
-                          DataSourceMAAS.read_maas_seed_dir, my_d)
+        self.assertRaises(
+            DataSourceMAAS.MAASSeedDirMalformed,
+            DataSourceMAAS.read_maas_seed_dir,
+            my_d,
+        )
 
     def test_seed_dir_none(self):
         """Verify that empty seed_dir raises MAASSeedDirNone."""
 
         my_d = os.path.join(self.tmp, "valid_empty")
-        self.assertRaises(DataSourceMAAS.MAASSeedDirNone,
-                          DataSourceMAAS.read_maas_seed_dir, my_d)
+        self.assertRaises(
+            DataSourceMAAS.MAASSeedDirNone,
+            DataSourceMAAS.read_maas_seed_dir,
+            my_d,
+        )
 
     def test_seed_dir_missing(self):
         """Verify that missing seed_dir raises MAASSeedDirNone."""
-        self.assertRaises(DataSourceMAAS.MAASSeedDirNone,
-                          DataSourceMAAS.read_maas_seed_dir,
-                          os.path.join(self.tmp, "nonexistantdirectory"))
+        self.assertRaises(
+            DataSourceMAAS.MAASSeedDirNone,
+            DataSourceMAAS.read_maas_seed_dir,
+            os.path.join(self.tmp, "nonexistantdirectory"),
+        )
 
     def mock_read_maas_seed_url(self, data, seed, version="19991231"):
         """mock up readurl to appear as a web server at seed has provided data.
         return what read_maas_seed_url returns."""
+
         def my_readurl(*args, **kwargs):
             if len(args):
                 url = args[0]
             else:
-                url = kwargs['url']
+                url = kwargs["url"]
             prefix = "%s/%s/" % (seed, version)
             if not url.startswith(prefix):
                 raise ValueError("unexpected call %s" % url)
 
-            short = url[len(prefix):]
+            short = url[len(prefix) :]
             if short not in data:
                 raise url_helper.UrlError("not found", code=404, url=url)
             return url_helper.StringResponse(data[short])
@@ -124,44 +144,48 @@ class TestMAASDataSource(CiTestCase):
     def test_seed_url_valid(self):
         """Verify that valid seed_url is read as such."""
         valid = {
-            'meta-data/instance-id': 'i-instanceid',
-            'meta-data/local-hostname': 'test-hostname',
-            'meta-data/public-keys': 'test-hostname',
-            'meta-data/vendor-data': b'my-vendordata',
-            'user-data': b'foodata',
+            "meta-data/instance-id": "i-instanceid",
+            "meta-data/local-hostname": "test-hostname",
+            "meta-data/public-keys": "test-hostname",
+            "meta-data/vendor-data": b"my-vendordata",
+            "user-data": b"foodata",
         }
         my_seed = "http://example.com/xmeta"
         my_ver = "1999-99-99"
         ud, md, vd = self.mock_read_maas_seed_url(valid, my_seed, my_ver)
 
-        self.assertEqual(valid['meta-data/instance-id'], md['instance-id'])
+        self.assertEqual(valid["meta-data/instance-id"], md["instance-id"])
         self.assertEqual(
-            valid['meta-data/local-hostname'], md['local-hostname'])
-        self.assertEqual(valid['meta-data/public-keys'], md['public-keys'])
-        self.assertEqual(valid['user-data'], ud)
+            valid["meta-data/local-hostname"], md["local-hostname"]
+        )
+        self.assertEqual(valid["meta-data/public-keys"], md["public-keys"])
+        self.assertEqual(valid["user-data"], ud)
         # vendor-data is yaml, which decodes a string
-        self.assertEqual(valid['meta-data/vendor-data'].decode(), vd)
+        self.assertEqual(valid["meta-data/vendor-data"].decode(), vd)
 
     def test_seed_url_vendor_data_dict(self):
-        expected_vd = {'key1': 'value1'}
+        expected_vd = {"key1": "value1"}
         valid = {
-            'meta-data/instance-id': 'i-instanceid',
-            'meta-data/local-hostname': 'test-hostname',
-            'meta-data/vendor-data': yaml.safe_dump(expected_vd).encode(),
+            "meta-data/instance-id": "i-instanceid",
+            "meta-data/local-hostname": "test-hostname",
+            "meta-data/vendor-data": yaml.safe_dump(expected_vd).encode(),
         }
         _ud, md, vd = self.mock_read_maas_seed_url(
-            valid, "http://example.com/foo")
+            valid, "http://example.com/foo"
+        )
 
-        self.assertEqual(valid['meta-data/instance-id'], md['instance-id'])
+        self.assertEqual(valid["meta-data/instance-id"], md["instance-id"])
         self.assertEqual(expected_vd, vd)
 
 
 @mock.patch("cloudinit.sources.DataSourceMAAS.url_helper.OauthUrlHelper")
 class TestGetOauthHelper(CiTestCase):
-    base_cfg = {'consumer_key': 'FAKE_CONSUMER_KEY',
-                'token_key': 'FAKE_TOKEN_KEY',
-                'token_secret': 'FAKE_TOKEN_SECRET',
-                'consumer_secret': None}
+    base_cfg = {
+        "consumer_key": "FAKE_CONSUMER_KEY",
+        "token_key": "FAKE_TOKEN_KEY",
+        "token_secret": "FAKE_TOKEN_SECRET",
+        "consumer_secret": None,
+    }
 
     def test_all_required(self, m_helper):
         """Valid config as expected."""
@@ -171,17 +195,20 @@ class TestGetOauthHelper(CiTestCase):
     def test_other_fields_not_passed_through(self, m_helper):
         """Only relevant fields are passed through."""
         mycfg = self.base_cfg.copy()
-        mycfg['unrelated_field'] = 'unrelated'
+        mycfg["unrelated_field"] = "unrelated"
         DataSourceMAAS.get_oauth_helper(mycfg)
         m_helper.assert_has_calls([mock.call(**self.base_cfg)])
 
 
 class TestGetIdHash(CiTestCase):
-    v1_cfg = {'consumer_key': 'CKEY', 'token_key': 'TKEY',
-              'token_secret': 'TSEC'}
+    v1_cfg = {
+        "consumer_key": "CKEY",
+        "token_key": "TKEY",
+        "token_secret": "TSEC",
+    }
     v1_id = (
-        'v1:'
-        '403ee5f19c956507f1d0e50814119c405902137ea4f8838bde167c5da8110392')
+        "v1:403ee5f19c956507f1d0e50814119c405902137ea4f8838bde167c5da8110392"
+    )
 
     def test_v1_expected(self):
         """Test v1 id generated as expected working behavior from config."""
@@ -191,8 +218,8 @@ class TestGetIdHash(CiTestCase):
     def test_v1_extra_fields_are_ignored(self):
         """Test v1 id ignores unused entries in config."""
         cfg = self.v1_cfg.copy()
-        cfg['consumer_secret'] = "BOO"
-        cfg['unrelated'] = "HI MOM"
+        cfg["consumer_secret"] = "BOO"
+        cfg["unrelated"] = "HI MOM"
         result = DataSourceMAAS.get_id_from_ds_cfg(cfg)
         self.assertEqual(self.v1_id, result)
 
diff --git a/tests/unittests/sources/test_nocloud.py b/tests/unittests/sources/test_nocloud.py
index 26f91054..1f6b722d 100644
--- a/tests/unittests/sources/test_nocloud.py
+++ b/tests/unittests/sources/test_nocloud.py
@@ -1,27 +1,27 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import dmi
-from cloudinit import helpers
-from cloudinit.sources.DataSourceNoCloud import (
-    DataSourceNoCloud as dsNoCloud,
-    _maybe_remove_top_network,
-    parse_cmdline_data)
-from cloudinit import util
-from tests.unittests.helpers import CiTestCase, populate_dir, mock, ExitStack
-
 import os
 import textwrap
+
 import yaml
 
+from cloudinit import dmi, helpers, util
+from cloudinit.sources.DataSourceNoCloud import DataSourceNoCloud as dsNoCloud
+from cloudinit.sources.DataSourceNoCloud import (
+    _maybe_remove_top_network,
+    parse_cmdline_data,
+)
+from tests.unittests.helpers import CiTestCase, ExitStack, mock, populate_dir
+
 
-@mock.patch('cloudinit.sources.DataSourceNoCloud.util.is_lxd')
+@mock.patch("cloudinit.sources.DataSourceNoCloud.util.is_lxd")
 class TestNoCloudDataSource(CiTestCase):
-
     def setUp(self):
         super(TestNoCloudDataSource, self).setUp()
         self.tmp = self.tmp_dir()
         self.paths = helpers.Paths(
-            {'cloud_dir': self.tmp, 'run_dir': self.tmp})
+            {"cloud_dir": self.tmp, "run_dir": self.tmp}
+        )
 
         self.cmdline = "root=TESTCMDLINE"
 
@@ -29,77 +29,77 @@ class TestNoCloudDataSource(CiTestCase):
         self.addCleanup(self.mocks.close)
 
         self.mocks.enter_context(
-            mock.patch.object(util, 'get_cmdline', return_value=self.cmdline))
+            mock.patch.object(util, "get_cmdline", return_value=self.cmdline)
+        )
         self.mocks.enter_context(
-            mock.patch.object(dmi, 'read_dmi_data', return_value=None))
+            mock.patch.object(dmi, "read_dmi_data", return_value=None)
+        )
 
     def _test_fs_config_is_read(self, fs_label, fs_label_to_search):
-        vfat_device = 'device-1'
+        vfat_device = "device-1"
 
         def m_mount_cb(device, callback, mtype):
-            if (device == vfat_device):
-                return {'meta-data': yaml.dump({'instance-id': 'IID'})}
+            if device == vfat_device:
+                return {"meta-data": yaml.dump({"instance-id": "IID"})}
             else:
                 return {}
 
-        def m_find_devs_with(query='', path=''):
-            if 'TYPE=vfat' == query:
+        def m_find_devs_with(query="", path=""):
+            if "TYPE=vfat" == query:
                 return [vfat_device]
-            elif 'LABEL={}'.format(fs_label) == query:
+            elif "LABEL={}".format(fs_label) == query:
                 return [vfat_device]
             else:
                 return []
 
         self.mocks.enter_context(
-            mock.patch.object(util, 'find_devs_with',
-                              side_effect=m_find_devs_with))
+            mock.patch.object(
+                util, "find_devs_with", side_effect=m_find_devs_with
+            )
+        )
         self.mocks.enter_context(
-            mock.patch.object(util, 'mount_cb',
-                              side_effect=m_mount_cb))
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': fs_label_to_search}}}
+            mock.patch.object(util, "mount_cb", side_effect=m_mount_cb)
+        )
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": fs_label_to_search}}}
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
 
-        self.assertEqual(dsrc.metadata.get('instance-id'), 'IID')
+        self.assertEqual(dsrc.metadata.get("instance-id"), "IID")
         self.assertTrue(ret)
 
     def test_nocloud_seed_dir_on_lxd(self, m_is_lxd):
-        md = {'instance-id': 'IID', 'dsmode': 'local'}
+        md = {"instance-id": "IID", "dsmode": "local"}
         ud = b"USER_DATA_HERE"
         seed_dir = os.path.join(self.paths.seed_dir, "nocloud")
-        populate_dir(seed_dir,
-                     {'user-data': ud, 'meta-data': yaml.safe_dump(md)})
+        populate_dir(
+            seed_dir, {"user-data": ud, "meta-data": yaml.safe_dump(md)}
+        )
 
-        sys_cfg = {
-            'datasource': {'NoCloud': {'fs_label': None}}
-        }
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
         self.assertEqual(dsrc.userdata_raw, ud)
         self.assertEqual(dsrc.metadata, md)
-        self.assertEqual(dsrc.platform_type, 'lxd')
-        self.assertEqual(
-            dsrc.subplatform, 'seed-dir (%s)' % seed_dir)
+        self.assertEqual(dsrc.platform_type, "lxd")
+        self.assertEqual(dsrc.subplatform, "seed-dir (%s)" % seed_dir)
         self.assertTrue(ret)
 
     def test_nocloud_seed_dir_non_lxd_platform_is_nocloud(self, m_is_lxd):
         """Non-lxd environments will list nocloud as the platform."""
         m_is_lxd.return_value = False
-        md = {'instance-id': 'IID', 'dsmode': 'local'}
+        md = {"instance-id": "IID", "dsmode": "local"}
         seed_dir = os.path.join(self.paths.seed_dir, "nocloud")
-        populate_dir(seed_dir,
-                     {'user-data': '', 'meta-data': yaml.safe_dump(md)})
+        populate_dir(
+            seed_dir, {"user-data": "", "meta-data": yaml.safe_dump(md)}
+        )
 
-        sys_cfg = {
-            'datasource': {'NoCloud': {'fs_label': None}}
-        }
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         self.assertTrue(dsrc.get_data())
-        self.assertEqual(dsrc.platform_type, 'nocloud')
-        self.assertEqual(
-            dsrc.subplatform, 'seed-dir (%s)' % seed_dir)
+        self.assertEqual(dsrc.platform_type, "nocloud")
+        self.assertEqual(dsrc.subplatform, "seed-dir (%s)" % seed_dir)
 
     def test_fs_label(self, m_is_lxd):
         # find_devs_with should not be called ff fs_label is None
@@ -107,65 +107,70 @@ class TestNoCloudDataSource(CiTestCase):
             pass
 
         self.mocks.enter_context(
-            mock.patch.object(util, 'find_devs_with',
-                              side_effect=PsuedoException))
+            mock.patch.object(
+                util, "find_devs_with", side_effect=PsuedoException
+            )
+        )
 
         # by default, NoCloud should search for filesystems by label
-        sys_cfg = {'datasource': {'NoCloud': {}}}
+        sys_cfg = {"datasource": {"NoCloud": {}}}
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         self.assertRaises(PsuedoException, dsrc.get_data)
 
         # but disabling searching should just end up with None found
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
         self.assertFalse(ret)
 
     def test_fs_config_lowercase_label(self, m_is_lxd):
-        self._test_fs_config_is_read('cidata', 'cidata')
+        self._test_fs_config_is_read("cidata", "cidata")
 
     def test_fs_config_uppercase_label(self, m_is_lxd):
-        self._test_fs_config_is_read('CIDATA', 'cidata')
+        self._test_fs_config_is_read("CIDATA", "cidata")
 
     def test_fs_config_lowercase_label_search_uppercase(self, m_is_lxd):
-        self._test_fs_config_is_read('cidata', 'CIDATA')
+        self._test_fs_config_is_read("cidata", "CIDATA")
 
     def test_fs_config_uppercase_label_search_uppercase(self, m_is_lxd):
-        self._test_fs_config_is_read('CIDATA', 'CIDATA')
+        self._test_fs_config_is_read("CIDATA", "CIDATA")
 
     def test_no_datasource_expected(self, m_is_lxd):
         # no source should be found if no cmdline, config, and fs_label=None
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         self.assertFalse(dsrc.get_data())
 
     def test_seed_in_config(self, m_is_lxd):
         data = {
-            'fs_label': None,
-            'meta-data': yaml.safe_dump({'instance-id': 'IID'}),
-            'user-data': b"USER_DATA_RAW",
+            "fs_label": None,
+            "meta-data": yaml.safe_dump({"instance-id": "IID"}),
+            "user-data": b"USER_DATA_RAW",
         }
 
-        sys_cfg = {'datasource': {'NoCloud': data}}
+        sys_cfg = {"datasource": {"NoCloud": data}}
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
         self.assertEqual(dsrc.userdata_raw, b"USER_DATA_RAW")
-        self.assertEqual(dsrc.metadata.get('instance-id'), 'IID')
+        self.assertEqual(dsrc.metadata.get("instance-id"), "IID")
         self.assertTrue(ret)
 
     def test_nocloud_seed_with_vendordata(self, m_is_lxd):
-        md = {'instance-id': 'IID', 'dsmode': 'local'}
+        md = {"instance-id": "IID", "dsmode": "local"}
         ud = b"USER_DATA_HERE"
         vd = b"THIS IS MY VENDOR_DATA"
 
-        populate_dir(os.path.join(self.paths.seed_dir, "nocloud"),
-                     {'user-data': ud, 'meta-data': yaml.safe_dump(md),
-                      'vendor-data': vd})
+        populate_dir(
+            os.path.join(self.paths.seed_dir, "nocloud"),
+            {
+                "user-data": ud,
+                "meta-data": yaml.safe_dump(md),
+                "vendor-data": vd,
+            },
+        )
 
-        sys_cfg = {
-            'datasource': {'NoCloud': {'fs_label': None}}
-        }
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
@@ -175,10 +180,12 @@ class TestNoCloudDataSource(CiTestCase):
         self.assertTrue(ret)
 
     def test_nocloud_no_vendordata(self, m_is_lxd):
-        populate_dir(os.path.join(self.paths.seed_dir, "nocloud"),
-                     {'user-data': b"ud", 'meta-data': "instance-id: IID\n"})
+        populate_dir(
+            os.path.join(self.paths.seed_dir, "nocloud"),
+            {"user-data": b"ud", "meta-data": "instance-id: IID\n"},
+        )
 
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
@@ -189,23 +196,28 @@ class TestNoCloudDataSource(CiTestCase):
     def test_metadata_network_interfaces(self, m_is_lxd):
         gateway = "103.225.10.1"
         md = {
-            'instance-id': 'i-abcd',
-            'local-hostname': 'hostname1',
-            'network-interfaces': textwrap.dedent("""\
+            "instance-id": "i-abcd",
+            "local-hostname": "hostname1",
+            "network-interfaces": textwrap.dedent(
+                """\
                 auto eth0
                 iface eth0 inet static
                 hwaddr 00:16:3e:70:e1:04
                 address 103.225.10.12
                 netmask 255.255.255.0
-                gateway """ + gateway + """
-                dns-servers 8.8.8.8""")}
+                gateway """
+                + gateway
+                + """
+                dns-servers 8.8.8.8"""
+            ),
+        }
 
         populate_dir(
             os.path.join(self.paths.seed_dir, "nocloud"),
-            {'user-data': b"ud",
-             'meta-data': yaml.dump(md) + "\n"})
+            {"user-data": b"ud", "meta-data": yaml.dump(md) + "\n"},
+        )
 
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
@@ -215,16 +227,26 @@ class TestNoCloudDataSource(CiTestCase):
 
     def test_metadata_network_config(self, m_is_lxd):
         # network-config needs to get into network_config
-        netconf = {'version': 1,
-                   'config': [{'type': 'physical', 'name': 'interface0',
-                               'subnets': [{'type': 'dhcp'}]}]}
+        netconf = {
+            "version": 1,
+            "config": [
+                {
+                    "type": "physical",
+                    "name": "interface0",
+                    "subnets": [{"type": "dhcp"}],
+                }
+            ],
+        }
         populate_dir(
             os.path.join(self.paths.seed_dir, "nocloud"),
-            {'user-data': b"ud",
-             'meta-data': "instance-id: IID\n",
-             'network-config': yaml.dump(netconf) + "\n"})
+            {
+                "user-data": b"ud",
+                "meta-data": "instance-id: IID\n",
+                "network-config": yaml.dump(netconf) + "\n",
+            },
+        )
 
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
@@ -233,14 +255,17 @@ class TestNoCloudDataSource(CiTestCase):
 
     def test_metadata_network_config_with_toplevel_network(self, m_is_lxd):
         """network-config may have 'network' top level key."""
-        netconf = {'config': 'disabled'}
+        netconf = {"config": "disabled"}
         populate_dir(
             os.path.join(self.paths.seed_dir, "nocloud"),
-            {'user-data': b"ud",
-             'meta-data': "instance-id: IID\n",
-             'network-config': yaml.dump({'network': netconf}) + "\n"})
+            {
+                "user-data": b"ud",
+                "meta-data": "instance-id: IID\n",
+                "network-config": yaml.dump({"network": netconf}) + "\n",
+            },
+        )
 
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
@@ -251,27 +276,42 @@ class TestNoCloudDataSource(CiTestCase):
         # network-config should override meta-data/network-interfaces
         gateway = "103.225.10.1"
         md = {
-            'instance-id': 'i-abcd',
-            'local-hostname': 'hostname1',
-            'network-interfaces': textwrap.dedent("""\
+            "instance-id": "i-abcd",
+            "local-hostname": "hostname1",
+            "network-interfaces": textwrap.dedent(
+                """\
                 auto eth0
                 iface eth0 inet static
                 hwaddr 00:16:3e:70:e1:04
                 address 103.225.10.12
                 netmask 255.255.255.0
-                gateway """ + gateway + """
-                dns-servers 8.8.8.8""")}
+                gateway """
+                + gateway
+                + """
+                dns-servers 8.8.8.8"""
+            ),
+        }
 
-        netconf = {'version': 1,
-                   'config': [{'type': 'physical', 'name': 'interface0',
-                               'subnets': [{'type': 'dhcp'}]}]}
+        netconf = {
+            "version": 1,
+            "config": [
+                {
+                    "type": "physical",
+                    "name": "interface0",
+                    "subnets": [{"type": "dhcp"}],
+                }
+            ],
+        }
         populate_dir(
             os.path.join(self.paths.seed_dir, "nocloud"),
-            {'user-data': b"ud",
-             'meta-data': yaml.dump(md) + "\n",
-             'network-config': yaml.dump(netconf) + "\n"})
+            {
+                "user-data": b"ud",
+                "meta-data": yaml.dump(md) + "\n",
+                "network-config": yaml.dump(netconf) + "\n",
+            },
+        )
 
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
         ret = dsrc.get_data()
@@ -281,17 +321,24 @@ class TestNoCloudDataSource(CiTestCase):
 
     @mock.patch("cloudinit.util.blkid")
     def test_nocloud_get_devices_freebsd(self, m_is_lxd, fake_blkid):
-        populate_dir(os.path.join(self.paths.seed_dir, "nocloud"),
-                     {'user-data': b"ud", 'meta-data': "instance-id: IID\n"})
+        populate_dir(
+            os.path.join(self.paths.seed_dir, "nocloud"),
+            {"user-data": b"ud", "meta-data": "instance-id: IID\n"},
+        )
 
-        sys_cfg = {'datasource': {'NoCloud': {'fs_label': None}}}
+        sys_cfg = {"datasource": {"NoCloud": {"fs_label": None}}}
 
         self.mocks.enter_context(
-            mock.patch.object(util, 'is_FreeBSD', return_value=True))
+            mock.patch.object(util, "is_FreeBSD", return_value=True)
+        )
 
         def _mfind_devs_with_freebsd(
-                criteria=None, oformat='device',
-                tag=None, no_cache=False, path=None):
+            criteria=None,
+            oformat="device",
+            tag=None,
+            no_cache=False,
+            path=None,
+        ):
             if not criteria:
                 return ["/dev/msdosfs/foo", "/dev/iso9660/foo"]
             if criteria.startswith("LABEL="):
@@ -304,17 +351,19 @@ class TestNoCloudDataSource(CiTestCase):
 
         self.mocks.enter_context(
             mock.patch.object(
-                util, 'find_devs_with_freebsd',
-                side_effect=_mfind_devs_with_freebsd))
+                util,
+                "find_devs_with_freebsd",
+                side_effect=_mfind_devs_with_freebsd,
+            )
+        )
 
         dsrc = dsNoCloud(sys_cfg=sys_cfg, distro=None, paths=self.paths)
-        ret = dsrc._get_devices('foo')
-        self.assertEqual(['/dev/msdosfs/foo', '/dev/iso9660/foo'], ret)
+        ret = dsrc._get_devices("foo")
+        self.assertEqual(["/dev/msdosfs/foo", "/dev/iso9660/foo"], ret)
         fake_blkid.assert_not_called()
 
 
 class TestParseCommandLineData(CiTestCase):
-
     def test_parse_cmdline_data_valid(self):
         ds_id = "ds=nocloud"
         pairs = (
@@ -322,18 +371,21 @@ class TestParseCommandLineData(CiTestCase):
             ("%(ds_id)s; root=/dev/foo", {}),
             ("%(ds_id)s", {}),
             ("%(ds_id)s;", {}),
-            ("%(ds_id)s;s=SEED", {'seedfrom': 'SEED'}),
-            ("%(ds_id)s;seedfrom=SEED;local-hostname=xhost",
-             {'seedfrom': 'SEED', 'local-hostname': 'xhost'}),
-            ("%(ds_id)s;h=xhost",
-             {'local-hostname': 'xhost'}),
-            ("%(ds_id)s;h=xhost;i=IID",
-             {'local-hostname': 'xhost', 'instance-id': 'IID'}),
+            ("%(ds_id)s;s=SEED", {"seedfrom": "SEED"}),
+            (
+                "%(ds_id)s;seedfrom=SEED;local-hostname=xhost",
+                {"seedfrom": "SEED", "local-hostname": "xhost"},
+            ),
+            ("%(ds_id)s;h=xhost", {"local-hostname": "xhost"}),
+            (
+                "%(ds_id)s;h=xhost;i=IID",
+                {"local-hostname": "xhost", "instance-id": "IID"},
+            ),
         )
 
         for (fmt, expected) in pairs:
             fill = {}
-            cmdline = fmt % {'ds_id': ds_id}
+            cmdline = fmt % {"ds_id": ds_id}
             ret = parse_cmdline_data(ds_id=ds_id, fill=fill, cmdline=cmdline)
             self.assertEqual(expected, fill)
             self.assertTrue(ret)
@@ -358,36 +410,44 @@ class TestParseCommandLineData(CiTestCase):
 
 class TestMaybeRemoveToplevelNetwork(CiTestCase):
     """test _maybe_remove_top_network function."""
-    basecfg = [{'type': 'physical', 'name': 'interface0',
-                'subnets': [{'type': 'dhcp'}]}]
+
+    basecfg = [
+        {
+            "type": "physical",
+            "name": "interface0",
+            "subnets": [{"type": "dhcp"}],
+        }
+    ]
 
     def test_should_remove_safely(self):
-        mcfg = {'config': self.basecfg, 'version': 1}
-        self.assertEqual(mcfg, _maybe_remove_top_network({'network': mcfg}))
+        mcfg = {"config": self.basecfg, "version": 1}
+        self.assertEqual(mcfg, _maybe_remove_top_network({"network": mcfg}))
 
     def test_no_remove_if_other_keys(self):
         """should not shift if other keys at top level."""
-        mcfg = {'network': {'config': self.basecfg, 'version': 1},
-                'unknown_keyname': 'keyval'}
+        mcfg = {
+            "network": {"config": self.basecfg, "version": 1},
+            "unknown_keyname": "keyval",
+        }
         self.assertEqual(mcfg, _maybe_remove_top_network(mcfg))
 
     def test_no_remove_if_non_dict(self):
         """should not shift if not a dict."""
-        mcfg = {'network': '"content here'}
+        mcfg = {"network": '"content here'}
         self.assertEqual(mcfg, _maybe_remove_top_network(mcfg))
 
     def test_no_remove_if_missing_config_or_version(self):
         """should not shift unless network entry has config and version."""
-        mcfg = {'network': {'config': self.basecfg}}
+        mcfg = {"network": {"config": self.basecfg}}
         self.assertEqual(mcfg, _maybe_remove_top_network(mcfg))
 
-        mcfg = {'network': {'version': 1}}
+        mcfg = {"network": {"version": 1}}
         self.assertEqual(mcfg, _maybe_remove_top_network(mcfg))
 
     def test_remove_with_config_disabled(self):
         """network/config=disabled should be shifted."""
-        mcfg = {'config': 'disabled'}
-        self.assertEqual(mcfg, _maybe_remove_top_network({'network': mcfg}))
+        mcfg = {"config": "disabled"}
+        self.assertEqual(mcfg, _maybe_remove_top_network({"network": mcfg}))
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_opennebula.py b/tests/unittests/sources/test_opennebula.py
index e5963f5a..e05c4749 100644
--- a/tests/unittests/sources/test_opennebula.py
+++ b/tests/unittests/sources/test_opennebula.py
@@ -1,62 +1,61 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import helpers
-from cloudinit.sources import DataSourceOpenNebula as ds
-from cloudinit import util
-from tests.unittests.helpers import mock, populate_dir, CiTestCase
-
 import os
 import pwd
 import unittest
 
 import pytest
 
+from cloudinit import helpers, util
+from cloudinit.sources import DataSourceOpenNebula as ds
+from tests.unittests.helpers import CiTestCase, mock, populate_dir
 
 TEST_VARS = {
-    'VAR1': 'single',
-    'VAR2': 'double word',
-    'VAR3': 'multi\nline\n',
-    'VAR4': "'single'",
-    'VAR5': "'double word'",
-    'VAR6': "'multi\nline\n'",
-    'VAR7': 'single\\t',
-    'VAR8': 'double\\tword',
-    'VAR9': 'multi\\t\nline\n',
-    'VAR10': '\\',  # expect '\'
-    'VAR11': '\'',  # expect '
-    'VAR12': '$',   # expect $
+    "VAR1": "single",
+    "VAR2": "double word",
+    "VAR3": "multi\nline\n",
+    "VAR4": "'single'",
+    "VAR5": "'double word'",
+    "VAR6": "'multi\nline\n'",
+    "VAR7": "single\\t",
+    "VAR8": "double\\tword",
+    "VAR9": "multi\\t\nline\n",
+    "VAR10": "\\",  # expect '\'
+    "VAR11": "'",  # expect '
+    "VAR12": "$",  # expect $
 }
 
-INVALID_CONTEXT = ';'
-USER_DATA = '#cloud-config\napt_upgrade: true'
-SSH_KEY = 'ssh-rsa AAAAB3NzaC1....sIkJhq8wdX+4I3A4cYbYP ubuntu@server-460-%i'
-HOSTNAME = 'foo.example.com'
-PUBLIC_IP = '10.0.0.3'
-MACADDR = '02:00:0a:12:01:01'
-IP_BY_MACADDR = '10.18.1.1'
-IP4_PREFIX = '24'
-IP6_GLOBAL = '2001:db8:1:0:400:c0ff:fea8:1ba'
-IP6_ULA = 'fd01:dead:beaf:0:400:c0ff:fea8:1ba'
-IP6_GW = '2001:db8:1::ffff'
-IP6_PREFIX = '48'
+INVALID_CONTEXT = ";"
+USER_DATA = "#cloud-config\napt_upgrade: true"
+SSH_KEY = "ssh-rsa AAAAB3NzaC1....sIkJhq8wdX+4I3A4cYbYP ubuntu@server-460-%i"
+HOSTNAME = "foo.example.com"
+PUBLIC_IP = "10.0.0.3"
+MACADDR = "02:00:0a:12:01:01"
+IP_BY_MACADDR = "10.18.1.1"
+IP4_PREFIX = "24"
+IP6_GLOBAL = "2001:db8:1:0:400:c0ff:fea8:1ba"
+IP6_ULA = "fd01:dead:beaf:0:400:c0ff:fea8:1ba"
+IP6_GW = "2001:db8:1::ffff"
+IP6_PREFIX = "48"
 
 DS_PATH = "cloudinit.sources.DataSourceOpenNebula"
 
 
 class TestOpenNebulaDataSource(CiTestCase):
     parsed_user = None
-    allowed_subp = ['bash']
+    allowed_subp = ["bash"]
 
     def setUp(self):
         super(TestOpenNebulaDataSource, self).setUp()
         self.tmp = self.tmp_dir()
         self.paths = helpers.Paths(
-            {'cloud_dir': self.tmp, 'run_dir': self.tmp})
+            {"cloud_dir": self.tmp, "run_dir": self.tmp}
+        )
 
         # defaults for few tests
         self.ds = ds.DataSourceOpenNebula
         self.seed_dir = os.path.join(self.paths.seed_dir, "opennebula")
-        self.sys_cfg = {'datasource': {'OpenNebula': {'dsmode': 'local'}}}
+        self.sys_cfg = {"datasource": {"OpenNebula": {"dsmode": "local"}}}
 
         # we don't want 'sudo' called in tests. so we patch switch_user_cmd
         def my_switch_user_cmd(user):
@@ -86,7 +85,7 @@ class TestOpenNebulaDataSource(CiTestCase):
         try:
             # dont' try to lookup for CDs
             util.find_devs_with = lambda n: []
-            populate_dir(self.seed_dir, {'context.sh': INVALID_CONTEXT})
+            populate_dir(self.seed_dir, {"context.sh": INVALID_CONTEXT})
             dsrc = self.ds(sys_cfg=self.sys_cfg, distro=None, paths=self.paths)
             self.assertRaises(ds.BrokenContextDiskDir, dsrc.get_data)
         finally:
@@ -97,18 +96,19 @@ class TestOpenNebulaDataSource(CiTestCase):
         try:
             # generate non-existing system user name
             sys_cfg = self.sys_cfg
-            invalid_user = 'invalid'
-            while not sys_cfg['datasource']['OpenNebula'].get('parseuser'):
+            invalid_user = "invalid"
+            while not sys_cfg["datasource"]["OpenNebula"].get("parseuser"):
                 try:
                     pwd.getpwnam(invalid_user)
-                    invalid_user += 'X'
+                    invalid_user += "X"
                 except KeyError:
-                    sys_cfg['datasource']['OpenNebula']['parseuser'] = \
-                        invalid_user
+                    sys_cfg["datasource"]["OpenNebula"][
+                        "parseuser"
+                    ] = invalid_user
 
             # dont' try to lookup for CDs
             util.find_devs_with = lambda n: []
-            populate_context_dir(self.seed_dir, {'KEY1': 'val1'})
+            populate_context_dir(self.seed_dir, {"KEY1": "val1"})
             dsrc = self.ds(sys_cfg=sys_cfg, distro=None, paths=self.paths)
             self.assertRaises(ds.BrokenContextDiskDir, dsrc.get_data)
         finally:
@@ -119,227 +119,265 @@ class TestOpenNebulaDataSource(CiTestCase):
         try:
             # dont' try to lookup for CDs
             util.find_devs_with = lambda n: []
-            populate_context_dir(self.seed_dir, {'KEY1': 'val1'})
+            populate_context_dir(self.seed_dir, {"KEY1": "val1"})
             dsrc = self.ds(sys_cfg=self.sys_cfg, distro=None, paths=self.paths)
             ret = dsrc.get_data()
             self.assertTrue(ret)
         finally:
             util.find_devs_with = orig_find_devs_with
-        self.assertEqual('opennebula', dsrc.cloud_name)
-        self.assertEqual('opennebula', dsrc.platform_type)
+        self.assertEqual("opennebula", dsrc.cloud_name)
+        self.assertEqual("opennebula", dsrc.platform_type)
         self.assertEqual(
-            'seed-dir (%s/seed/opennebula)' % self.tmp, dsrc.subplatform)
+            "seed-dir (%s/seed/opennebula)" % self.tmp, dsrc.subplatform
+        )
 
     def test_seed_dir_non_contextdisk(self):
-        self.assertRaises(ds.NonContextDiskDir, ds.read_context_disk_dir,
-                          self.seed_dir, mock.Mock())
+        self.assertRaises(
+            ds.NonContextDiskDir,
+            ds.read_context_disk_dir,
+            self.seed_dir,
+            mock.Mock(),
+        )
 
     def test_seed_dir_empty1_context(self):
-        populate_dir(self.seed_dir, {'context.sh': ''})
+        populate_dir(self.seed_dir, {"context.sh": ""})
         results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-        self.assertIsNone(results['userdata'])
-        self.assertEqual(results['metadata'], {})
+        self.assertIsNone(results["userdata"])
+        self.assertEqual(results["metadata"], {})
 
     def test_seed_dir_empty2_context(self):
         populate_context_dir(self.seed_dir, {})
         results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-        self.assertIsNone(results['userdata'])
-        self.assertEqual(results['metadata'], {})
+        self.assertIsNone(results["userdata"])
+        self.assertEqual(results["metadata"], {})
 
     def test_seed_dir_broken_context(self):
-        populate_dir(self.seed_dir, {'context.sh': INVALID_CONTEXT})
+        populate_dir(self.seed_dir, {"context.sh": INVALID_CONTEXT})
 
-        self.assertRaises(ds.BrokenContextDiskDir,
-                          ds.read_context_disk_dir,
-                          self.seed_dir, mock.Mock())
+        self.assertRaises(
+            ds.BrokenContextDiskDir,
+            ds.read_context_disk_dir,
+            self.seed_dir,
+            mock.Mock(),
+        )
 
     def test_context_parser(self):
         populate_context_dir(self.seed_dir, TEST_VARS)
         results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-        self.assertTrue('metadata' in results)
-        self.assertEqual(TEST_VARS, results['metadata'])
+        self.assertTrue("metadata" in results)
+        self.assertEqual(TEST_VARS, results["metadata"])
 
     def test_ssh_key(self):
-        public_keys = ['first key', 'second key']
+        public_keys = ["first key", "second key"]
         for c in range(4):
-            for k in ('SSH_KEY', 'SSH_PUBLIC_KEY'):
+            for k in ("SSH_KEY", "SSH_PUBLIC_KEY"):
                 my_d = os.path.join(self.tmp, "%s-%i" % (k, c))
-                populate_context_dir(my_d, {k: '\n'.join(public_keys)})
+                populate_context_dir(my_d, {k: "\n".join(public_keys)})
                 results = ds.read_context_disk_dir(my_d, mock.Mock())
 
-                self.assertTrue('metadata' in results)
-                self.assertTrue('public-keys' in results['metadata'])
-                self.assertEqual(public_keys,
-                                 results['metadata']['public-keys'])
+                self.assertTrue("metadata" in results)
+                self.assertTrue("public-keys" in results["metadata"])
+                self.assertEqual(
+                    public_keys, results["metadata"]["public-keys"]
+                )
 
             public_keys.append(SSH_KEY % (c + 1,))
 
     def test_user_data_plain(self):
-        for k in ('USER_DATA', 'USERDATA'):
+        for k in ("USER_DATA", "USERDATA"):
             my_d = os.path.join(self.tmp, k)
-            populate_context_dir(my_d, {k: USER_DATA,
-                                        'USERDATA_ENCODING': ''})
+            populate_context_dir(my_d, {k: USER_DATA, "USERDATA_ENCODING": ""})
             results = ds.read_context_disk_dir(my_d, mock.Mock())
 
-            self.assertTrue('userdata' in results)
-            self.assertEqual(USER_DATA, results['userdata'])
+            self.assertTrue("userdata" in results)
+            self.assertEqual(USER_DATA, results["userdata"])
 
     def test_user_data_encoding_required_for_decode(self):
         b64userdata = util.b64e(USER_DATA)
-        for k in ('USER_DATA', 'USERDATA'):
+        for k in ("USER_DATA", "USERDATA"):
             my_d = os.path.join(self.tmp, k)
             populate_context_dir(my_d, {k: b64userdata})
             results = ds.read_context_disk_dir(my_d, mock.Mock())
 
-            self.assertTrue('userdata' in results)
-            self.assertEqual(b64userdata, results['userdata'])
+            self.assertTrue("userdata" in results)
+            self.assertEqual(b64userdata, results["userdata"])
 
     def test_user_data_base64_encoding(self):
-        for k in ('USER_DATA', 'USERDATA'):
+        for k in ("USER_DATA", "USERDATA"):
             my_d = os.path.join(self.tmp, k)
-            populate_context_dir(my_d, {k: util.b64e(USER_DATA),
-                                        'USERDATA_ENCODING': 'base64'})
+            populate_context_dir(
+                my_d, {k: util.b64e(USER_DATA), "USERDATA_ENCODING": "base64"}
+            )
             results = ds.read_context_disk_dir(my_d, mock.Mock())
 
-            self.assertTrue('userdata' in results)
-            self.assertEqual(USER_DATA, results['userdata'])
+            self.assertTrue("userdata" in results)
+            self.assertEqual(USER_DATA, results["userdata"])
 
     @mock.patch(DS_PATH + ".get_physical_nics_by_mac")
     def test_hostname(self, m_get_phys_by_mac):
-        for dev in ('eth0', 'ens3'):
+        for dev in ("eth0", "ens3"):
             m_get_phys_by_mac.return_value = {MACADDR: dev}
-            for k in ('SET_HOSTNAME', 'HOSTNAME', 'PUBLIC_IP', 'IP_PUBLIC',
-                      'ETH0_IP'):
+            for k in (
+                "SET_HOSTNAME",
+                "HOSTNAME",
+                "PUBLIC_IP",
+                "IP_PUBLIC",
+                "ETH0_IP",
+            ):
                 my_d = os.path.join(self.tmp, k)
                 populate_context_dir(my_d, {k: PUBLIC_IP})
                 results = ds.read_context_disk_dir(my_d, mock.Mock())
 
-                self.assertTrue('metadata' in results)
-                self.assertTrue('local-hostname' in results['metadata'])
+                self.assertTrue("metadata" in results)
+                self.assertTrue("local-hostname" in results["metadata"])
                 self.assertEqual(
-                    PUBLIC_IP, results['metadata']['local-hostname'])
+                    PUBLIC_IP, results["metadata"]["local-hostname"]
+                )
 
     @mock.patch(DS_PATH + ".get_physical_nics_by_mac")
     def test_network_interfaces(self, m_get_phys_by_mac):
-        for dev in ('eth0', 'ens3'):
+        for dev in ("eth0", "ens3"):
             m_get_phys_by_mac.return_value = {MACADDR: dev}
 
             # without ETH0_MAC
             # for Older OpenNebula?
-            populate_context_dir(self.seed_dir, {'ETH0_IP': IP_BY_MACADDR})
+            populate_context_dir(self.seed_dir, {"ETH0_IP": IP_BY_MACADDR})
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP_BY_MACADDR + '/' + IP4_PREFIX in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP_BY_MACADDR + "/" + IP4_PREFIX
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_IP and ETH0_MAC
             populate_context_dir(
-                self.seed_dir, {'ETH0_IP': IP_BY_MACADDR, 'ETH0_MAC': MACADDR})
+                self.seed_dir, {"ETH0_IP": IP_BY_MACADDR, "ETH0_MAC": MACADDR}
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP_BY_MACADDR + '/' + IP4_PREFIX in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP_BY_MACADDR + "/" + IP4_PREFIX
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_IP with empty string and ETH0_MAC
             # in the case of using Virtual Network contains
             # "AR = [ TYPE = ETHER ]"
             populate_context_dir(
-                self.seed_dir, {'ETH0_IP': '', 'ETH0_MAC': MACADDR})
+                self.seed_dir, {"ETH0_IP": "", "ETH0_MAC": MACADDR}
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP_BY_MACADDR + '/' + IP4_PREFIX in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP_BY_MACADDR + "/" + IP4_PREFIX
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_MASK
             populate_context_dir(
-                self.seed_dir, {
-                    'ETH0_IP': IP_BY_MACADDR,
-                    'ETH0_MAC': MACADDR,
-                    'ETH0_MASK': '255.255.0.0'
-                })
+                self.seed_dir,
+                {
+                    "ETH0_IP": IP_BY_MACADDR,
+                    "ETH0_MAC": MACADDR,
+                    "ETH0_MASK": "255.255.0.0",
+                },
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP_BY_MACADDR + '/16' in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP_BY_MACADDR + "/16"
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_MASK with empty string
             populate_context_dir(
-                self.seed_dir, {
-                    'ETH0_IP': IP_BY_MACADDR,
-                    'ETH0_MAC': MACADDR,
-                    'ETH0_MASK': ''
-                })
+                self.seed_dir,
+                {
+                    "ETH0_IP": IP_BY_MACADDR,
+                    "ETH0_MAC": MACADDR,
+                    "ETH0_MASK": "",
+                },
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP_BY_MACADDR + '/' + IP4_PREFIX in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP_BY_MACADDR + "/" + IP4_PREFIX
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_IP6
             populate_context_dir(
-                self.seed_dir, {
-                    'ETH0_IP6': IP6_GLOBAL,
-                    'ETH0_MAC': MACADDR,
-                })
+                self.seed_dir,
+                {
+                    "ETH0_IP6": IP6_GLOBAL,
+                    "ETH0_MAC": MACADDR,
+                },
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP6_GLOBAL + '/64' in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP6_GLOBAL + "/64"
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_IP6_ULA
             populate_context_dir(
-                self.seed_dir, {
-                    'ETH0_IP6_ULA': IP6_ULA,
-                    'ETH0_MAC': MACADDR,
-                })
+                self.seed_dir,
+                {
+                    "ETH0_IP6_ULA": IP6_ULA,
+                    "ETH0_MAC": MACADDR,
+                },
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP6_ULA + '/64' in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP6_ULA + "/64"
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_IP6 and ETH0_IP6_PREFIX_LENGTH
             populate_context_dir(
-                self.seed_dir, {
-                    'ETH0_IP6': IP6_GLOBAL,
-                    'ETH0_IP6_PREFIX_LENGTH': IP6_PREFIX,
-                    'ETH0_MAC': MACADDR,
-                })
+                self.seed_dir,
+                {
+                    "ETH0_IP6": IP6_GLOBAL,
+                    "ETH0_IP6_PREFIX_LENGTH": IP6_PREFIX,
+                    "ETH0_MAC": MACADDR,
+                },
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP6_GLOBAL + '/' + IP6_PREFIX in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP6_GLOBAL + "/" + IP6_PREFIX
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
             # ETH0_IP6 and ETH0_IP6_PREFIX_LENGTH with empty string
             populate_context_dir(
-                self.seed_dir, {
-                    'ETH0_IP6': IP6_GLOBAL,
-                    'ETH0_IP6_PREFIX_LENGTH': '',
-                    'ETH0_MAC': MACADDR,
-                })
+                self.seed_dir,
+                {
+                    "ETH0_IP6": IP6_GLOBAL,
+                    "ETH0_IP6_PREFIX_LENGTH": "",
+                    "ETH0_MAC": MACADDR,
+                },
+            )
             results = ds.read_context_disk_dir(self.seed_dir, mock.Mock())
 
-            self.assertTrue('network-interfaces' in results)
+            self.assertTrue("network-interfaces" in results)
             self.assertTrue(
-                IP6_GLOBAL + '/64' in
-                results['network-interfaces']['ethernets'][dev]['addresses'])
+                IP6_GLOBAL + "/64"
+                in results["network-interfaces"]["ethernets"][dev]["addresses"]
+            )
 
     def test_find_candidates(self):
         def my_devs_with(criteria):
@@ -352,25 +390,28 @@ class TestOpenNebulaDataSource(CiTestCase):
         orig_find_devs_with = util.find_devs_with
         try:
             util.find_devs_with = my_devs_with
-            self.assertEqual(["/dev/sdb", "/dev/sr0", "/dev/vdb"],
-                             ds.find_candidate_devs())
+            self.assertEqual(
+                ["/dev/sdb", "/dev/sr0", "/dev/vdb"], ds.find_candidate_devs()
+            )
         finally:
             util.find_devs_with = orig_find_devs_with
 
 
-@mock.patch(DS_PATH + '.net.get_interfaces_by_mac', mock.Mock(return_value={}))
+@mock.patch(DS_PATH + ".net.get_interfaces_by_mac", mock.Mock(return_value={}))
 class TestOpenNebulaNetwork(unittest.TestCase):
 
-    system_nics = ('eth0', 'ens3')
+    system_nics = ("eth0", "ens3")
 
     def test_context_devname(self):
         """Verify context_devname correctly returns mac and name."""
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH1_MAC': '02:00:0a:12:0f:0f', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH1_MAC": "02:00:0a:12:0f:0f",
+        }
         expected = {
-            '02:00:0a:12:01:01': 'ETH0',
-            '02:00:0a:12:0f:0f': 'ETH1', }
+            "02:00:0a:12:01:01": "ETH0",
+            "02:00:0a:12:0f:0f": "ETH1",
+        }
         net = ds.OpenNebulaNetwork(context, mock.Mock())
         self.assertEqual(expected, net.context_devname)
 
@@ -380,28 +421,30 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         and search domains.
         """
         context = {
-            'DNS': '1.2.3.8',
-            'ETH0_DNS': '1.2.3.6 1.2.3.7',
-            'ETH0_SEARCH_DOMAIN': 'example.com example.org', }
+            "DNS": "1.2.3.8",
+            "ETH0_DNS": "1.2.3.6 1.2.3.7",
+            "ETH0_SEARCH_DOMAIN": "example.com example.org",
+        }
         expected = {
-            'addresses': ['1.2.3.6', '1.2.3.7', '1.2.3.8'],
-            'search': ['example.com', 'example.org']}
+            "addresses": ["1.2.3.6", "1.2.3.7", "1.2.3.8"],
+            "search": ["example.com", "example.org"],
+        }
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_nameservers('eth0')
+        val = net.get_nameservers("eth0")
         self.assertEqual(expected, val)
 
     def test_get_mtu(self):
         """Verify get_mtu('device') correctly returns MTU size."""
-        context = {'ETH0_MTU': '1280'}
+        context = {"ETH0_MTU": "1280"}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_mtu('eth0')
-        self.assertEqual('1280', val)
+        val = net.get_mtu("eth0")
+        self.assertEqual("1280", val)
 
     def test_get_ip(self):
         """Verify get_ip('device') correctly returns IPv4 address."""
-        context = {'ETH0_IP': PUBLIC_IP}
+        context = {"ETH0_IP": PUBLIC_IP}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_ip('eth0', MACADDR)
+        val = net.get_ip("eth0", MACADDR)
         self.assertEqual(PUBLIC_IP, val)
 
     def test_get_ip_emptystring(self):
@@ -410,9 +453,9 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         It returns IP address created by MAC address if ETH0_IP has empty
         string.
         """
-        context = {'ETH0_IP': ''}
+        context = {"ETH0_IP": ""}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_ip('eth0', MACADDR)
+        val = net.get_ip("eth0", MACADDR)
         self.assertEqual(IP_BY_MACADDR, val)
 
     def test_get_ip6(self):
@@ -421,11 +464,12 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         In this case, IPv6 address is Given by ETH0_IP6.
         """
         context = {
-            'ETH0_IP6': IP6_GLOBAL,
-            'ETH0_IP6_ULA': '', }
+            "ETH0_IP6": IP6_GLOBAL,
+            "ETH0_IP6_ULA": "",
+        }
         expected = [IP6_GLOBAL]
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_ip6('eth0')
+        val = net.get_ip6("eth0")
         self.assertEqual(expected, val)
 
     def test_get_ip6_ula(self):
@@ -434,11 +478,12 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         In this case, IPv6 address is Given by ETH0_IP6_ULA.
         """
         context = {
-            'ETH0_IP6': '',
-            'ETH0_IP6_ULA': IP6_ULA, }
+            "ETH0_IP6": "",
+            "ETH0_IP6_ULA": IP6_ULA,
+        }
         expected = [IP6_ULA]
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_ip6('eth0')
+        val = net.get_ip6("eth0")
         self.assertEqual(expected, val)
 
     def test_get_ip6_dual(self):
@@ -447,20 +492,21 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         In this case, IPv6 addresses are Given by ETH0_IP6 and ETH0_IP6_ULA.
         """
         context = {
-            'ETH0_IP6': IP6_GLOBAL,
-            'ETH0_IP6_ULA': IP6_ULA, }
+            "ETH0_IP6": IP6_GLOBAL,
+            "ETH0_IP6_ULA": IP6_ULA,
+        }
         expected = [IP6_GLOBAL, IP6_ULA]
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_ip6('eth0')
+        val = net.get_ip6("eth0")
         self.assertEqual(expected, val)
 
     def test_get_ip6_prefix(self):
         """
         Verify get_ip6_prefix('device') correctly returns IPv6 prefix.
         """
-        context = {'ETH0_IP6_PREFIX_LENGTH': IP6_PREFIX}
+        context = {"ETH0_IP6_PREFIX_LENGTH": IP6_PREFIX}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_ip6_prefix('eth0')
+        val = net.get_ip6_prefix("eth0")
         self.assertEqual(IP6_PREFIX, val)
 
     def test_get_ip6_prefix_emptystring(self):
@@ -469,59 +515,59 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         It returns default value '64' if ETH0_IP6_PREFIX_LENGTH has empty
         string.
         """
-        context = {'ETH0_IP6_PREFIX_LENGTH': ''}
+        context = {"ETH0_IP6_PREFIX_LENGTH": ""}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_ip6_prefix('eth0')
-        self.assertEqual('64', val)
+        val = net.get_ip6_prefix("eth0")
+        self.assertEqual("64", val)
 
     def test_get_gateway(self):
         """
         Verify get_gateway('device') correctly returns IPv4 default gateway
         address.
         """
-        context = {'ETH0_GATEWAY': '1.2.3.5'}
+        context = {"ETH0_GATEWAY": "1.2.3.5"}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_gateway('eth0')
-        self.assertEqual('1.2.3.5', val)
+        val = net.get_gateway("eth0")
+        self.assertEqual("1.2.3.5", val)
 
     def test_get_gateway6(self):
         """
         Verify get_gateway6('device') correctly returns IPv6 default gateway
         address.
         """
-        for k in ('GATEWAY6', 'IP6_GATEWAY'):
-            context = {'ETH0_' + k: IP6_GW}
+        for k in ("GATEWAY6", "IP6_GATEWAY"):
+            context = {"ETH0_" + k: IP6_GW}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
-            val = net.get_gateway6('eth0')
+            val = net.get_gateway6("eth0")
             self.assertEqual(IP6_GW, val)
 
     def test_get_mask(self):
         """
         Verify get_mask('device') correctly returns IPv4 subnet mask.
         """
-        context = {'ETH0_MASK': '255.255.0.0'}
+        context = {"ETH0_MASK": "255.255.0.0"}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_mask('eth0')
-        self.assertEqual('255.255.0.0', val)
+        val = net.get_mask("eth0")
+        self.assertEqual("255.255.0.0", val)
 
     def test_get_mask_emptystring(self):
         """
         Verify get_mask('device') correctly returns IPv4 subnet mask.
         It returns default value '255.255.255.0' if ETH0_MASK has empty string.
         """
-        context = {'ETH0_MASK': ''}
+        context = {"ETH0_MASK": ""}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_mask('eth0')
-        self.assertEqual('255.255.255.0', val)
+        val = net.get_mask("eth0")
+        self.assertEqual("255.255.255.0", val)
 
     def test_get_network(self):
         """
         Verify get_network('device') correctly returns IPv4 network address.
         """
-        context = {'ETH0_NETWORK': '1.2.3.0'}
+        context = {"ETH0_NETWORK": "1.2.3.0"}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_network('eth0', MACADDR)
-        self.assertEqual('1.2.3.0', val)
+        val = net.get_network("eth0", MACADDR)
+        self.assertEqual("1.2.3.0", val)
 
     def test_get_network_emptystring(self):
         """
@@ -529,48 +575,48 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         It returns network address created by MAC address if ETH0_NETWORK has
         empty string.
         """
-        context = {'ETH0_NETWORK': ''}
+        context = {"ETH0_NETWORK": ""}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_network('eth0', MACADDR)
-        self.assertEqual('10.18.1.0', val)
+        val = net.get_network("eth0", MACADDR)
+        self.assertEqual("10.18.1.0", val)
 
     def test_get_field(self):
         """
         Verify get_field('device', 'name') returns *context* value.
         """
-        context = {'ETH9_DUMMY': 'DUMMY_VALUE'}
+        context = {"ETH9_DUMMY": "DUMMY_VALUE"}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_field('eth9', 'dummy')
-        self.assertEqual('DUMMY_VALUE', val)
+        val = net.get_field("eth9", "dummy")
+        self.assertEqual("DUMMY_VALUE", val)
 
     def test_get_field_withdefaultvalue(self):
         """
         Verify get_field('device', 'name', 'default value') returns *context*
         value.
         """
-        context = {'ETH9_DUMMY': 'DUMMY_VALUE'}
+        context = {"ETH9_DUMMY": "DUMMY_VALUE"}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_field('eth9', 'dummy', 'DEFAULT_VALUE')
-        self.assertEqual('DUMMY_VALUE', val)
+        val = net.get_field("eth9", "dummy", "DEFAULT_VALUE")
+        self.assertEqual("DUMMY_VALUE", val)
 
     def test_get_field_withdefaultvalue_emptycontext(self):
         """
         Verify get_field('device', 'name', 'default value') returns *default*
         value if context value is empty string.
         """
-        context = {'ETH9_DUMMY': ''}
+        context = {"ETH9_DUMMY": ""}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_field('eth9', 'dummy', 'DEFAULT_VALUE')
-        self.assertEqual('DEFAULT_VALUE', val)
+        val = net.get_field("eth9", "dummy", "DEFAULT_VALUE")
+        self.assertEqual("DEFAULT_VALUE", val)
 
     def test_get_field_emptycontext(self):
         """
         Verify get_field('device', 'name') returns None if context value is
         empty string.
         """
-        context = {'ETH9_DUMMY': ''}
+        context = {"ETH9_DUMMY": ""}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_field('eth9', 'dummy')
+        val = net.get_field("eth9", "dummy")
         self.assertEqual(None, val)
 
     def test_get_field_nonecontext(self):
@@ -578,9 +624,9 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         Verify get_field('device', 'name') returns None if context value is
         None.
         """
-        context = {'ETH9_DUMMY': None}
+        context = {"ETH9_DUMMY": None}
         net = ds.OpenNebulaNetwork(context, mock.Mock())
-        val = net.get_field('eth9', 'dummy')
+        val = net.get_field("eth9", "dummy")
         self.assertEqual(None, val)
 
     @mock.patch(DS_PATH + ".get_physical_nics_by_mac")
@@ -589,31 +635,39 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         self.maxDiff = None
         # empty ETH0_GATEWAY
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_GATEWAY': '', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_GATEWAY": "",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
 
         # set ETH0_GATEWAY
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_GATEWAY': '1.2.3.5', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_GATEWAY": "1.2.3.5",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'gateway4': '1.2.3.5',
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "gateway4": "1.2.3.5",
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
@@ -624,31 +678,39 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         self.maxDiff = None
         # empty ETH0_GATEWAY6
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_GATEWAY6': '', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_GATEWAY6": "",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
 
         # set ETH0_GATEWAY6
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_GATEWAY6': IP6_GW, }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_GATEWAY6": IP6_GW,
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'gateway6': IP6_GW,
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "gateway6": IP6_GW,
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
@@ -659,37 +721,46 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         self.maxDiff = None
         # empty ETH0_IP6, ETH0_IP6_ULA, ETH0_IP6_PREFIX_LENGTH
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_IP6': '',
-            'ETH0_IP6_ULA': '',
-            'ETH0_IP6_PREFIX_LENGTH': '', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_IP6": "",
+            "ETH0_IP6_ULA": "",
+            "ETH0_IP6_PREFIX_LENGTH": "",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
 
         # set ETH0_IP6, ETH0_IP6_ULA, ETH0_IP6_PREFIX_LENGTH
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_IP6': IP6_GLOBAL,
-            'ETH0_IP6_PREFIX_LENGTH': IP6_PREFIX,
-            'ETH0_IP6_ULA': IP6_ULA, }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_IP6": IP6_GLOBAL,
+            "ETH0_IP6_PREFIX_LENGTH": IP6_PREFIX,
+            "ETH0_IP6_ULA": IP6_ULA,
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [
-                            IP_BY_MACADDR + '/' + IP4_PREFIX,
-                            IP6_GLOBAL + '/' + IP6_PREFIX,
-                            IP6_ULA + '/' + IP6_PREFIX]}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [
+                            IP_BY_MACADDR + "/" + IP4_PREFIX,
+                            IP6_GLOBAL + "/" + IP6_PREFIX,
+                            IP6_ULA + "/" + IP6_PREFIX,
+                        ],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
@@ -700,37 +771,46 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         self.maxDiff = None
         # empty DNS, ETH0_DNS, ETH0_SEARCH_DOMAIN
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'DNS': '',
-            'ETH0_DNS': '',
-            'ETH0_SEARCH_DOMAIN': '', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "DNS": "",
+            "ETH0_DNS": "",
+            "ETH0_SEARCH_DOMAIN": "",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
 
         # set DNS, ETH0_DNS, ETH0_SEARCH_DOMAIN
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'DNS': '1.2.3.8',
-            'ETH0_DNS': '1.2.3.6 1.2.3.7',
-            'ETH0_SEARCH_DOMAIN': 'example.com example.org', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "DNS": "1.2.3.8",
+            "ETH0_DNS": "1.2.3.6 1.2.3.7",
+            "ETH0_SEARCH_DOMAIN": "example.com example.org",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'nameservers': {
-                            'addresses': ['1.2.3.6', '1.2.3.7', '1.2.3.8'],
-                            'search': ['example.com', 'example.org']},
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "nameservers": {
+                            "addresses": ["1.2.3.6", "1.2.3.7", "1.2.3.8"],
+                            "search": ["example.com", "example.org"],
+                        },
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
@@ -741,31 +821,39 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         self.maxDiff = None
         # empty ETH0_MTU
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_MTU': '', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_MTU": "",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
 
         # set ETH0_MTU
         context = {
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_MTU': '1280', }
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_MTU": "1280",
+        }
         for nic in self.system_nics:
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'mtu': '1280',
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "mtu": "1280",
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork(context, mock.Mock())
             self.assertEqual(net.gen_conf(), expected)
@@ -776,11 +864,14 @@ class TestOpenNebulaNetwork(unittest.TestCase):
             m_get_phys_by_mac.return_value = {MACADDR: nic}
             net = ds.OpenNebulaNetwork({}, mock.Mock())
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/' + IP4_PREFIX]}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/" + IP4_PREFIX],
+                    }
+                },
+            }
 
             self.assertEqual(net.gen_conf(), expected)
 
@@ -795,71 +886,82 @@ class TestOpenNebulaNetwork(unittest.TestCase):
     def test_eth0_override(self):
         self.maxDiff = None
         context = {
-            'DNS': '1.2.3.8',
-            'ETH0_DNS': '1.2.3.6 1.2.3.7',
-            'ETH0_GATEWAY': '1.2.3.5',
-            'ETH0_GATEWAY6': '',
-            'ETH0_IP': IP_BY_MACADDR,
-            'ETH0_IP6': '',
-            'ETH0_IP6_PREFIX_LENGTH': '',
-            'ETH0_IP6_ULA': '',
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_MASK': '255.255.0.0',
-            'ETH0_MTU': '',
-            'ETH0_NETWORK': '10.18.0.0',
-            'ETH0_SEARCH_DOMAIN': '',
+            "DNS": "1.2.3.8",
+            "ETH0_DNS": "1.2.3.6 1.2.3.7",
+            "ETH0_GATEWAY": "1.2.3.5",
+            "ETH0_GATEWAY6": "",
+            "ETH0_IP": IP_BY_MACADDR,
+            "ETH0_IP6": "",
+            "ETH0_IP6_PREFIX_LENGTH": "",
+            "ETH0_IP6_ULA": "",
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_MASK": "255.255.0.0",
+            "ETH0_MTU": "",
+            "ETH0_NETWORK": "10.18.0.0",
+            "ETH0_SEARCH_DOMAIN": "",
         }
         for nic in self.system_nics:
-            net = ds.OpenNebulaNetwork(context, mock.Mock(),
-                                       system_nics_by_mac={MACADDR: nic})
+            net = ds.OpenNebulaNetwork(
+                context, mock.Mock(), system_nics_by_mac={MACADDR: nic}
+            )
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [IP_BY_MACADDR + '/16'],
-                        'gateway4': '1.2.3.5',
-                        'nameservers': {
-                            'addresses': ['1.2.3.6', '1.2.3.7', '1.2.3.8']}}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [IP_BY_MACADDR + "/16"],
+                        "gateway4": "1.2.3.5",
+                        "nameservers": {
+                            "addresses": ["1.2.3.6", "1.2.3.7", "1.2.3.8"]
+                        },
+                    }
+                },
+            }
 
             self.assertEqual(expected, net.gen_conf())
 
     def test_eth0_v4v6_override(self):
         self.maxDiff = None
         context = {
-            'DNS': '1.2.3.8',
-            'ETH0_DNS': '1.2.3.6 1.2.3.7',
-            'ETH0_GATEWAY': '1.2.3.5',
-            'ETH0_GATEWAY6': IP6_GW,
-            'ETH0_IP': IP_BY_MACADDR,
-            'ETH0_IP6': IP6_GLOBAL,
-            'ETH0_IP6_PREFIX_LENGTH': IP6_PREFIX,
-            'ETH0_IP6_ULA': IP6_ULA,
-            'ETH0_MAC': '02:00:0a:12:01:01',
-            'ETH0_MASK': '255.255.0.0',
-            'ETH0_MTU': '1280',
-            'ETH0_NETWORK': '10.18.0.0',
-            'ETH0_SEARCH_DOMAIN': 'example.com example.org',
+            "DNS": "1.2.3.8",
+            "ETH0_DNS": "1.2.3.6 1.2.3.7",
+            "ETH0_GATEWAY": "1.2.3.5",
+            "ETH0_GATEWAY6": IP6_GW,
+            "ETH0_IP": IP_BY_MACADDR,
+            "ETH0_IP6": IP6_GLOBAL,
+            "ETH0_IP6_PREFIX_LENGTH": IP6_PREFIX,
+            "ETH0_IP6_ULA": IP6_ULA,
+            "ETH0_MAC": "02:00:0a:12:01:01",
+            "ETH0_MASK": "255.255.0.0",
+            "ETH0_MTU": "1280",
+            "ETH0_NETWORK": "10.18.0.0",
+            "ETH0_SEARCH_DOMAIN": "example.com example.org",
         }
         for nic in self.system_nics:
-            net = ds.OpenNebulaNetwork(context, mock.Mock(),
-                                       system_nics_by_mac={MACADDR: nic})
+            net = ds.OpenNebulaNetwork(
+                context, mock.Mock(), system_nics_by_mac={MACADDR: nic}
+            )
 
             expected = {
-                'version': 2,
-                'ethernets': {
+                "version": 2,
+                "ethernets": {
                     nic: {
-                        'match': {'macaddress': MACADDR},
-                        'addresses': [
-                            IP_BY_MACADDR + '/16',
-                            IP6_GLOBAL + '/' + IP6_PREFIX,
-                            IP6_ULA + '/' + IP6_PREFIX],
-                        'gateway4': '1.2.3.5',
-                        'gateway6': IP6_GW,
-                        'nameservers': {
-                            'addresses': ['1.2.3.6', '1.2.3.7', '1.2.3.8'],
-                            'search': ['example.com', 'example.org']},
-                        'mtu': '1280'}}}
+                        "match": {"macaddress": MACADDR},
+                        "addresses": [
+                            IP_BY_MACADDR + "/16",
+                            IP6_GLOBAL + "/" + IP6_PREFIX,
+                            IP6_ULA + "/" + IP6_PREFIX,
+                        ],
+                        "gateway4": "1.2.3.5",
+                        "gateway6": IP6_GW,
+                        "nameservers": {
+                            "addresses": ["1.2.3.6", "1.2.3.7", "1.2.3.8"],
+                            "search": ["example.com", "example.org"],
+                        },
+                        "mtu": "1280",
+                    }
+                },
+            }
 
             self.assertEqual(expected, net.gen_conf())
 
@@ -869,62 +971,67 @@ class TestOpenNebulaNetwork(unittest.TestCase):
         MAC_1 = "02:00:0a:12:01:01"
         MAC_2 = "02:00:0a:12:01:02"
         context = {
-            'DNS': '1.2.3.8',
-            'ETH0_DNS': '1.2.3.6 1.2.3.7',
-            'ETH0_GATEWAY': '1.2.3.5',
-            'ETH0_GATEWAY6': IP6_GW,
-            'ETH0_IP': '10.18.1.1',
-            'ETH0_IP6': IP6_GLOBAL,
-            'ETH0_IP6_PREFIX_LENGTH': '',
-            'ETH0_IP6_ULA': IP6_ULA,
-            'ETH0_MAC': MAC_2,
-            'ETH0_MASK': '255.255.0.0',
-            'ETH0_MTU': '1280',
-            'ETH0_NETWORK': '10.18.0.0',
-            'ETH0_SEARCH_DOMAIN': 'example.com',
-            'ETH3_DNS': '10.3.1.2',
-            'ETH3_GATEWAY': '10.3.0.1',
-            'ETH3_GATEWAY6': '',
-            'ETH3_IP': '10.3.1.3',
-            'ETH3_IP6': '',
-            'ETH3_IP6_PREFIX_LENGTH': '',
-            'ETH3_IP6_ULA': '',
-            'ETH3_MAC': MAC_1,
-            'ETH3_MASK': '255.255.0.0',
-            'ETH3_MTU': '',
-            'ETH3_NETWORK': '10.3.0.0',
-            'ETH3_SEARCH_DOMAIN': 'third.example.com third.example.org',
+            "DNS": "1.2.3.8",
+            "ETH0_DNS": "1.2.3.6 1.2.3.7",
+            "ETH0_GATEWAY": "1.2.3.5",
+            "ETH0_GATEWAY6": IP6_GW,
+            "ETH0_IP": "10.18.1.1",
+            "ETH0_IP6": IP6_GLOBAL,
+            "ETH0_IP6_PREFIX_LENGTH": "",
+            "ETH0_IP6_ULA": IP6_ULA,
+            "ETH0_MAC": MAC_2,
+            "ETH0_MASK": "255.255.0.0",
+            "ETH0_MTU": "1280",
+            "ETH0_NETWORK": "10.18.0.0",
+            "ETH0_SEARCH_DOMAIN": "example.com",
+            "ETH3_DNS": "10.3.1.2",
+            "ETH3_GATEWAY": "10.3.0.1",
+            "ETH3_GATEWAY6": "",
+            "ETH3_IP": "10.3.1.3",
+            "ETH3_IP6": "",
+            "ETH3_IP6_PREFIX_LENGTH": "",
+            "ETH3_IP6_ULA": "",
+            "ETH3_MAC": MAC_1,
+            "ETH3_MASK": "255.255.0.0",
+            "ETH3_MTU": "",
+            "ETH3_NETWORK": "10.3.0.0",
+            "ETH3_SEARCH_DOMAIN": "third.example.com third.example.org",
         }
         net = ds.OpenNebulaNetwork(
             context,
             mock.Mock(),
-            system_nics_by_mac={MAC_1: 'enp0s25', MAC_2: 'enp1s2'}
+            system_nics_by_mac={MAC_1: "enp0s25", MAC_2: "enp1s2"},
         )
 
         expected = {
-            'version': 2,
-            'ethernets': {
-                'enp1s2': {
-                    'match': {'macaddress': MAC_2},
-                    'addresses': [
-                        '10.18.1.1/16',
-                        IP6_GLOBAL + '/64',
-                        IP6_ULA + '/64'],
-                    'gateway4': '1.2.3.5',
-                    'gateway6': IP6_GW,
-                    'nameservers': {
-                        'addresses': ['1.2.3.6', '1.2.3.7', '1.2.3.8'],
-                        'search': ['example.com']},
-                    'mtu': '1280'},
-                'enp0s25': {
-                    'match': {'macaddress': MAC_1},
-                    'addresses': ['10.3.1.3/16'],
-                    'gateway4': '10.3.0.1',
-                    'nameservers': {
-                        'addresses': ['10.3.1.2', '1.2.3.8'],
-                        'search': [
-                            'third.example.com',
-                            'third.example.org']}}}}
+            "version": 2,
+            "ethernets": {
+                "enp1s2": {
+                    "match": {"macaddress": MAC_2},
+                    "addresses": [
+                        "10.18.1.1/16",
+                        IP6_GLOBAL + "/64",
+                        IP6_ULA + "/64",
+                    ],
+                    "gateway4": "1.2.3.5",
+                    "gateway6": IP6_GW,
+                    "nameservers": {
+                        "addresses": ["1.2.3.6", "1.2.3.7", "1.2.3.8"],
+                        "search": ["example.com"],
+                    },
+                    "mtu": "1280",
+                },
+                "enp0s25": {
+                    "match": {"macaddress": MAC_1},
+                    "addresses": ["10.3.1.3/16"],
+                    "gateway4": "10.3.0.1",
+                    "nameservers": {
+                        "addresses": ["10.3.1.2", "1.2.3.8"],
+                        "search": ["third.example.com", "third.example.org"],
+                    },
+                },
+            },
+        }
 
         self.assertEqual(expected, net.gen_conf())
 
@@ -932,7 +1039,7 @@ class TestOpenNebulaNetwork(unittest.TestCase):
 class TestParseShellConfig:
     @pytest.mark.allow_subp_for("bash")
     def test_no_seconds(self):
-        cfg = '\n'.join(["foo=bar", "SECONDS=2", "xx=foo"])
+        cfg = "\n".join(["foo=bar", "SECONDS=2", "xx=foo"])
         # we could test 'sleep 2', but that would make the test run slower.
         ret = ds.parse_shell_config(cfg)
         assert ret == {"foo": "bar", "xx": "foo"}
@@ -971,7 +1078,8 @@ class TestGetPhysicalNicsByMac:
 def populate_context_dir(path, variables):
     data = "# Context variables generated by OpenNebula\n"
     for k, v in variables.items():
-        data += ("%s='%s'\n" % (k.upper(), v.replace(r"'", r"'\''")))
-    populate_dir(path, {'context.sh': data})
+        data += "%s='%s'\n" % (k.upper(), v.replace(r"'", r"'\''"))
+    populate_dir(path, {"context.sh": data})
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_openstack.py b/tests/unittests/sources/test_openstack.py
index 0d6fb04a..c111bbcd 100644
--- a/tests/unittests/sources/test_openstack.py
+++ b/tests/unittests/sources/test_openstack.py
@@ -5,74 +5,74 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import copy
-import httpretty as hp
 import json
 import re
 from io import StringIO
 from urllib.parse import urlparse
 
-from tests.unittests import helpers as test_helpers
+import httpretty as hp
 
-from cloudinit import helpers
-from cloudinit import settings
-from cloudinit.sources import BrokenMetadata, convert_vendordata, UNSET
+from cloudinit import helpers, settings, util
+from cloudinit.sources import UNSET, BrokenMetadata
 from cloudinit.sources import DataSourceOpenStack as ds
+from cloudinit.sources import convert_vendordata
 from cloudinit.sources.helpers import openstack
-from cloudinit import util
+from tests.unittests import helpers as test_helpers
 
 BASE_URL = "http://169.254.169.254"
-PUBKEY = 'ssh-rsa AAAAB3NzaC1....sIkJhq8wdX+4I3A4cYbYP ubuntu@server-460\n'
+PUBKEY = "ssh-rsa AAAAB3NzaC1....sIkJhq8wdX+4I3A4cYbYP ubuntu@server-460\n"
 EC2_META = {
-    'ami-id': 'ami-00000001',
-    'ami-launch-index': '0',
-    'ami-manifest-path': 'FIXME',
-    'hostname': 'sm-foo-test.novalocal',
-    'instance-action': 'none',
-    'instance-id': 'i-00000001',
-    'instance-type': 'm1.tiny',
-    'local-hostname': 'sm-foo-test.novalocal',
-    'local-ipv4': '0.0.0.0',
-    'public-hostname': 'sm-foo-test.novalocal',
-    'public-ipv4': '0.0.0.1',
-    'reservation-id': 'r-iru5qm4m',
+    "ami-id": "ami-00000001",
+    "ami-launch-index": "0",
+    "ami-manifest-path": "FIXME",
+    "hostname": "sm-foo-test.novalocal",
+    "instance-action": "none",
+    "instance-id": "i-00000001",
+    "instance-type": "m1.tiny",
+    "local-hostname": "sm-foo-test.novalocal",
+    "local-ipv4": "0.0.0.0",
+    "public-hostname": "sm-foo-test.novalocal",
+    "public-ipv4": "0.0.0.1",
+    "reservation-id": "r-iru5qm4m",
 }
-USER_DATA = b'#!/bin/sh\necho This is user data\n'
+USER_DATA = b"#!/bin/sh\necho This is user data\n"
 VENDOR_DATA = {
-    'magic': '',
-}
-VENDOR_DATA2 = {
-    'static': {}
+    "magic": "",
 }
+VENDOR_DATA2 = {"static": {}}
 OSTACK_META = {
-    'availability_zone': 'nova',
-    'files': [{'content_path': '/content/0000', 'path': '/etc/foo.cfg'},
-              {'content_path': '/content/0001', 'path': '/etc/bar/bar.cfg'}],
-    'hostname': 'sm-foo-test.novalocal',
-    'meta': {'dsmode': 'local', 'my-meta': 'my-value'},
-    'name': 'sm-foo-test',
-    'public_keys': {'mykey': PUBKEY},
-    'uuid': 'b0fa911b-69d4-4476-bbe2-1c92bff6535c',
+    "availability_zone": "nova",
+    "files": [
+        {"content_path": "/content/0000", "path": "/etc/foo.cfg"},
+        {"content_path": "/content/0001", "path": "/etc/bar/bar.cfg"},
+    ],
+    "hostname": "sm-foo-test.novalocal",
+    "meta": {"dsmode": "local", "my-meta": "my-value"},
+    "name": "sm-foo-test",
+    "public_keys": {"mykey": PUBKEY},
+    "uuid": "b0fa911b-69d4-4476-bbe2-1c92bff6535c",
 }
-CONTENT_0 = b'This is contents of /etc/foo.cfg\n'
-CONTENT_1 = b'# this is /etc/bar/bar.cfg\n'
+CONTENT_0 = b"This is contents of /etc/foo.cfg\n"
+CONTENT_1 = b"# this is /etc/bar/bar.cfg\n"
 OS_FILES = {
-    'openstack/content/0000': CONTENT_0,
-    'openstack/content/0001': CONTENT_1,
-    'openstack/latest/meta_data.json': json.dumps(OSTACK_META),
-    'openstack/latest/network_data.json': json.dumps(
-        {'links': [], 'networks': [], 'services': []}),
-    'openstack/latest/user_data': USER_DATA,
-    'openstack/latest/vendor_data.json': json.dumps(VENDOR_DATA),
-    'openstack/latest/vendor_data2.json': json.dumps(VENDOR_DATA2),
+    "openstack/content/0000": CONTENT_0,
+    "openstack/content/0001": CONTENT_1,
+    "openstack/latest/meta_data.json": json.dumps(OSTACK_META),
+    "openstack/latest/network_data.json": json.dumps(
+        {"links": [], "networks": [], "services": []}
+    ),
+    "openstack/latest/user_data": USER_DATA,
+    "openstack/latest/vendor_data.json": json.dumps(VENDOR_DATA),
+    "openstack/latest/vendor_data2.json": json.dumps(VENDOR_DATA2),
 }
 EC2_FILES = {
-    'latest/user-data': USER_DATA,
+    "latest/user-data": USER_DATA,
 }
 EC2_VERSIONS = [
-    'latest',
+    "latest",
 ]
 
-MOCK_PATH = 'cloudinit.sources.DataSourceOpenStack.'
+MOCK_PATH = "cloudinit.sources.DataSourceOpenStack."
 
 
 # TODO _register_uris should leverage test_ec2.register_mock_metaserver.
@@ -87,7 +87,7 @@ def _register_uris(version, ec2_files, ec2_meta, os_files):
         path = uri.path.lstrip("/")
         if path in ec2_files:
             return (200, headers, ec2_files.get(path))
-        if path == 'latest/meta-data/':
+        if path == "latest/meta-data/":
             buf = StringIO()
             for (k, v) in ec2_meta.items():
                 if isinstance(v, (list, tuple)):
@@ -96,7 +96,7 @@ def _register_uris(version, ec2_files, ec2_meta, os_files):
                     buf.write("%s" % (k))
                 buf.write("\n")
             return (200, headers, buf.getvalue())
-        if path.startswith('latest/meta-data/'):
+        if path.startswith("latest/meta-data/"):
             value = None
             pieces = path.split("/")
             if path.endswith("/"):
@@ -107,26 +107,29 @@ def _register_uris(version, ec2_files, ec2_meta, os_files):
                 value = util.get_cfg_by_path(ec2_meta, pieces)
             if value is not None:
                 return (200, headers, str(value))
-        return (404, headers, '')
+        return (404, headers, "")
 
     def match_os_uri(uri, headers):
         path = uri.path.strip("/")
-        if path == 'openstack':
+        if path == "openstack":
             return (200, headers, "\n".join([openstack.OS_LATEST]))
         path = uri.path.lstrip("/")
         if path in os_files:
             return (200, headers, os_files.get(path))
-        return (404, headers, '')
+        return (404, headers, "")
 
     def get_request_callback(method, uri, headers):
         uri = urlparse(uri)
         path = uri.path.lstrip("/").split("/")
-        if path[0] == 'openstack':
+        if path[0] == "openstack":
             return match_os_uri(uri, headers)
         return match_ec2_url(uri, headers)
 
-    hp.register_uri(hp.GET, re.compile(r'http://169.254.169.254/.*'),
-                    body=get_request_callback)
+    hp.register_uri(
+        hp.GET,
+        re.compile(r"http://169.254.169.254/.*"),
+        body=get_request_callback,
+    )
 
 
 def _read_metadata_service():
@@ -136,7 +139,7 @@ def _read_metadata_service():
 class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
 
     with_logs = True
-    VERSION = 'latest'
+    VERSION = "latest"
 
     def setUp(self):
         super(TestOpenStackDataSource, self).setUp()
@@ -145,40 +148,43 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
     def test_successful(self):
         _register_uris(self.VERSION, EC2_FILES, EC2_META, OS_FILES)
         f = _read_metadata_service()
-        self.assertEqual(VENDOR_DATA, f.get('vendordata'))
-        self.assertEqual(VENDOR_DATA2, f.get('vendordata2'))
-        self.assertEqual(CONTENT_0, f['files']['/etc/foo.cfg'])
-        self.assertEqual(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
-        self.assertEqual(2, len(f['files']))
-        self.assertEqual(USER_DATA, f.get('userdata'))
-        self.assertEqual(EC2_META, f.get('ec2-metadata'))
-        self.assertEqual(2, f.get('version'))
-        metadata = f['metadata']
-        self.assertEqual('nova', metadata.get('availability_zone'))
-        self.assertEqual('sm-foo-test.novalocal', metadata.get('hostname'))
-        self.assertEqual('sm-foo-test.novalocal',
-                         metadata.get('local-hostname'))
-        self.assertEqual('sm-foo-test', metadata.get('name'))
-        self.assertEqual('b0fa911b-69d4-4476-bbe2-1c92bff6535c',
-                         metadata.get('uuid'))
-        self.assertEqual('b0fa911b-69d4-4476-bbe2-1c92bff6535c',
-                         metadata.get('instance-id'))
+        self.assertEqual(VENDOR_DATA, f.get("vendordata"))
+        self.assertEqual(VENDOR_DATA2, f.get("vendordata2"))
+        self.assertEqual(CONTENT_0, f["files"]["/etc/foo.cfg"])
+        self.assertEqual(CONTENT_1, f["files"]["/etc/bar/bar.cfg"])
+        self.assertEqual(2, len(f["files"]))
+        self.assertEqual(USER_DATA, f.get("userdata"))
+        self.assertEqual(EC2_META, f.get("ec2-metadata"))
+        self.assertEqual(2, f.get("version"))
+        metadata = f["metadata"]
+        self.assertEqual("nova", metadata.get("availability_zone"))
+        self.assertEqual("sm-foo-test.novalocal", metadata.get("hostname"))
+        self.assertEqual(
+            "sm-foo-test.novalocal", metadata.get("local-hostname")
+        )
+        self.assertEqual("sm-foo-test", metadata.get("name"))
+        self.assertEqual(
+            "b0fa911b-69d4-4476-bbe2-1c92bff6535c", metadata.get("uuid")
+        )
+        self.assertEqual(
+            "b0fa911b-69d4-4476-bbe2-1c92bff6535c", metadata.get("instance-id")
+        )
 
     def test_no_ec2(self):
         _register_uris(self.VERSION, {}, {}, OS_FILES)
         f = _read_metadata_service()
-        self.assertEqual(VENDOR_DATA, f.get('vendordata'))
-        self.assertEqual(VENDOR_DATA2, f.get('vendordata2'))
-        self.assertEqual(CONTENT_0, f['files']['/etc/foo.cfg'])
-        self.assertEqual(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
-        self.assertEqual(USER_DATA, f.get('userdata'))
-        self.assertEqual({}, f.get('ec2-metadata'))
-        self.assertEqual(2, f.get('version'))
+        self.assertEqual(VENDOR_DATA, f.get("vendordata"))
+        self.assertEqual(VENDOR_DATA2, f.get("vendordata2"))
+        self.assertEqual(CONTENT_0, f["files"]["/etc/foo.cfg"])
+        self.assertEqual(CONTENT_1, f["files"]["/etc/bar/bar.cfg"])
+        self.assertEqual(USER_DATA, f.get("userdata"))
+        self.assertEqual({}, f.get("ec2-metadata"))
+        self.assertEqual(2, f.get("version"))
 
     def test_bad_metadata(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('meta_data.json'):
+            if k.endswith("meta_data.json"):
                 os_files.pop(k, None)
         _register_uris(self.VERSION, {}, {}, os_files)
         self.assertRaises(openstack.NonReadable, _read_metadata_service)
@@ -186,9 +192,9 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
     def test_bad_uuid(self):
         os_files = copy.deepcopy(OS_FILES)
         os_meta = copy.deepcopy(OSTACK_META)
-        os_meta.pop('uuid')
+        os_meta.pop("uuid")
         for k in list(os_files.keys()):
-            if k.endswith('meta_data.json'):
+            if k.endswith("meta_data.json"):
                 os_files[k] = json.dumps(os_meta)
         _register_uris(self.VERSION, {}, {}, os_files)
         self.assertRaises(BrokenMetadata, _read_metadata_service)
@@ -196,77 +202,78 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
     def test_userdata_empty(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('user_data'):
+            if k.endswith("user_data"):
                 os_files.pop(k, None)
         _register_uris(self.VERSION, {}, {}, os_files)
         f = _read_metadata_service()
-        self.assertEqual(VENDOR_DATA, f.get('vendordata'))
-        self.assertEqual(VENDOR_DATA2, f.get('vendordata2'))
-        self.assertEqual(CONTENT_0, f['files']['/etc/foo.cfg'])
-        self.assertEqual(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
-        self.assertFalse(f.get('userdata'))
+        self.assertEqual(VENDOR_DATA, f.get("vendordata"))
+        self.assertEqual(VENDOR_DATA2, f.get("vendordata2"))
+        self.assertEqual(CONTENT_0, f["files"]["/etc/foo.cfg"])
+        self.assertEqual(CONTENT_1, f["files"]["/etc/bar/bar.cfg"])
+        self.assertFalse(f.get("userdata"))
 
     def test_vendordata_empty(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('vendor_data.json'):
+            if k.endswith("vendor_data.json"):
                 os_files.pop(k, None)
         _register_uris(self.VERSION, {}, {}, os_files)
         f = _read_metadata_service()
-        self.assertEqual(CONTENT_0, f['files']['/etc/foo.cfg'])
-        self.assertEqual(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
-        self.assertFalse(f.get('vendordata'))
+        self.assertEqual(CONTENT_0, f["files"]["/etc/foo.cfg"])
+        self.assertEqual(CONTENT_1, f["files"]["/etc/bar/bar.cfg"])
+        self.assertFalse(f.get("vendordata"))
 
     def test_vendordata2_empty(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('vendor_data2.json'):
+            if k.endswith("vendor_data2.json"):
                 os_files.pop(k, None)
         _register_uris(self.VERSION, {}, {}, os_files)
         f = _read_metadata_service()
-        self.assertEqual(CONTENT_0, f['files']['/etc/foo.cfg'])
-        self.assertEqual(CONTENT_1, f['files']['/etc/bar/bar.cfg'])
-        self.assertFalse(f.get('vendordata2'))
+        self.assertEqual(CONTENT_0, f["files"]["/etc/foo.cfg"])
+        self.assertEqual(CONTENT_1, f["files"]["/etc/bar/bar.cfg"])
+        self.assertFalse(f.get("vendordata2"))
 
     def test_vendordata_invalid(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('vendor_data.json'):
-                os_files[k] = '{'  # some invalid json
+            if k.endswith("vendor_data.json"):
+                os_files[k] = "{"  # some invalid json
         _register_uris(self.VERSION, {}, {}, os_files)
         self.assertRaises(BrokenMetadata, _read_metadata_service)
 
     def test_vendordata2_invalid(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('vendor_data2.json'):
-                os_files[k] = '{'  # some invalid json
+            if k.endswith("vendor_data2.json"):
+                os_files[k] = "{"  # some invalid json
         _register_uris(self.VERSION, {}, {}, os_files)
         self.assertRaises(BrokenMetadata, _read_metadata_service)
 
     def test_metadata_invalid(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('meta_data.json'):
-                os_files[k] = '{'  # some invalid json
+            if k.endswith("meta_data.json"):
+                os_files[k] = "{"  # some invalid json
         _register_uris(self.VERSION, {}, {}, os_files)
         self.assertRaises(BrokenMetadata, _read_metadata_service)
 
-    @test_helpers.mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @test_helpers.mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_datasource(self, m_dhcp):
         _register_uris(self.VERSION, EC2_FILES, EC2_META, OS_FILES)
         ds_os = ds.DataSourceOpenStack(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         self.assertIsNone(ds_os.version)
-        mock_path = MOCK_PATH + 'detect_openstack'
+        mock_path = MOCK_PATH + "detect_openstack"
         with test_helpers.mock.patch(mock_path) as m_detect_os:
             m_detect_os.return_value = True
             found = ds_os.get_data()
         self.assertTrue(found)
         self.assertEqual(2, ds_os.version)
         md = dict(ds_os.metadata)
-        md.pop('instance-id', None)
-        md.pop('local-hostname', None)
+        md.pop("instance-id", None)
+        md.pop("local-hostname", None)
         self.assertEqual(OSTACK_META, md)
         self.assertEqual(EC2_META, ds_os.ec2_metadata)
         self.assertEqual(USER_DATA, ds_os.userdata_raw)
@@ -277,29 +284,35 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
         m_dhcp.assert_not_called()
 
     @hp.activate
-    @test_helpers.mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network')
-    @test_helpers.mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
+    @test_helpers.mock.patch("cloudinit.net.dhcp.EphemeralIPv4Network")
+    @test_helpers.mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
     def test_local_datasource(self, m_dhcp, m_net):
         """OpenStackLocal calls EphemeralDHCPNetwork and gets instance data."""
         _register_uris(self.VERSION, EC2_FILES, EC2_META, OS_FILES)
         ds_os_local = ds.DataSourceOpenStackLocal(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
-        ds_os_local._fallback_interface = 'eth9'  # Monkey patch for dhcp
-        m_dhcp.return_value = [{
-            'interface': 'eth9', 'fixed-address': '192.168.2.9',
-            'routers': '192.168.2.1', 'subnet-mask': '255.255.255.0',
-            'broadcast-address': '192.168.2.255'}]
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
+        ds_os_local._fallback_interface = "eth9"  # Monkey patch for dhcp
+        m_dhcp.return_value = [
+            {
+                "interface": "eth9",
+                "fixed-address": "192.168.2.9",
+                "routers": "192.168.2.1",
+                "subnet-mask": "255.255.255.0",
+                "broadcast-address": "192.168.2.255",
+            }
+        ]
 
         self.assertIsNone(ds_os_local.version)
-        mock_path = MOCK_PATH + 'detect_openstack'
+        mock_path = MOCK_PATH + "detect_openstack"
         with test_helpers.mock.patch(mock_path) as m_detect_os:
             m_detect_os.return_value = True
             found = ds_os_local.get_data()
         self.assertTrue(found)
         self.assertEqual(2, ds_os_local.version)
         md = dict(ds_os_local.metadata)
-        md.pop('instance-id', None)
-        md.pop('local-hostname', None)
+        md.pop("instance-id", None)
+        md.pop("local-hostname", None)
         self.assertEqual(OSTACK_META, md)
         self.assertEqual(EC2_META, ds_os_local.ec2_metadata)
         self.assertEqual(USER_DATA, ds_os_local.userdata_raw)
@@ -307,44 +320,45 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
         self.assertEqual(VENDOR_DATA, ds_os_local.vendordata_pure)
         self.assertEqual(VENDOR_DATA2, ds_os_local.vendordata2_pure)
         self.assertIsNone(ds_os_local.vendordata_raw)
-        m_dhcp.assert_called_with('eth9', None)
+        m_dhcp.assert_called_with("eth9", None)
 
     def test_bad_datasource_meta(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('meta_data.json'):
-                os_files[k] = '{'  # some invalid json
+            if k.endswith("meta_data.json"):
+                os_files[k] = "{"  # some invalid json
         _register_uris(self.VERSION, {}, {}, os_files)
-        ds_os = ds.DataSourceOpenStack(settings.CFG_BUILTIN,
-                                       None,
-                                       helpers.Paths({'run_dir': self.tmp}))
+        ds_os = ds.DataSourceOpenStack(
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         self.assertIsNone(ds_os.version)
-        mock_path = MOCK_PATH + 'detect_openstack'
+        mock_path = MOCK_PATH + "detect_openstack"
         with test_helpers.mock.patch(mock_path) as m_detect_os:
             m_detect_os.return_value = True
             found = ds_os.get_data()
         self.assertFalse(found)
         self.assertIsNone(ds_os.version)
         self.assertIn(
-            'InvalidMetaDataException: Broken metadata address'
-            ' http://169.254.169.25',
-            self.logs.getvalue())
+            "InvalidMetaDataException: Broken metadata address"
+            " http://169.254.169.25",
+            self.logs.getvalue(),
+        )
 
     def test_no_datasource(self):
         os_files = copy.deepcopy(OS_FILES)
         for k in list(os_files.keys()):
-            if k.endswith('meta_data.json'):
+            if k.endswith("meta_data.json"):
                 os_files.pop(k)
         _register_uris(self.VERSION, {}, {}, os_files)
-        ds_os = ds.DataSourceOpenStack(settings.CFG_BUILTIN,
-                                       None,
-                                       helpers.Paths({'run_dir': self.tmp}))
+        ds_os = ds.DataSourceOpenStack(
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds_os.ds_cfg = {
-            'max_wait': 0,
-            'timeout': 0,
+            "max_wait": 0,
+            "timeout": 0,
         }
         self.assertIsNone(ds_os.version)
-        mock_path = MOCK_PATH + 'detect_openstack'
+        mock_path = MOCK_PATH + "detect_openstack"
         with test_helpers.mock.patch(mock_path) as m_detect_os:
             m_detect_os.return_value = True
             found = ds_os.get_data()
@@ -353,12 +367,16 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
 
     def test_network_config_disabled_by_datasource_config(self):
         """The network_config can be disabled from datasource config."""
-        mock_path = MOCK_PATH + 'openstack.convert_net_json'
+        mock_path = MOCK_PATH + "openstack.convert_net_json"
         ds_os = ds.DataSourceOpenStack(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
-        ds_os.ds_cfg = {'apply_network_config': False}
-        sample_json = {'links': [{'ethernet_mac_address': 'mymac'}],
-                       'networks': [], 'services': []}
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
+        ds_os.ds_cfg = {"apply_network_config": False}
+        sample_json = {
+            "links": [{"ethernet_mac_address": "mymac"}],
+            "networks": [],
+            "services": [],
+        }
         ds_os.network_json = sample_json  # Ignore this content from metadata
         with test_helpers.mock.patch(mock_path) as m_convert_json:
             self.assertIsNone(ds_os.network_config)
@@ -366,26 +384,32 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
 
     def test_network_config_from_network_json(self):
         """The datasource gets network_config from network_data.json."""
-        mock_path = MOCK_PATH + 'openstack.convert_net_json'
-        example_cfg = {'version': 1, 'config': []}
+        mock_path = MOCK_PATH + "openstack.convert_net_json"
+        example_cfg = {"version": 1, "config": []}
         ds_os = ds.DataSourceOpenStack(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
-        sample_json = {'links': [{'ethernet_mac_address': 'mymac'}],
-                       'networks': [], 'services': []}
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
+        sample_json = {
+            "links": [{"ethernet_mac_address": "mymac"}],
+            "networks": [],
+            "services": [],
+        }
         ds_os.network_json = sample_json
         with test_helpers.mock.patch(mock_path) as m_convert_json:
             m_convert_json.return_value = example_cfg
             self.assertEqual(example_cfg, ds_os.network_config)
         self.assertIn(
-            'network config provided via network_json', self.logs.getvalue())
+            "network config provided via network_json", self.logs.getvalue()
+        )
         m_convert_json.assert_called_with(sample_json, known_macs=None)
 
     def test_network_config_cached(self):
         """The datasource caches the network_config property."""
-        mock_path = MOCK_PATH + 'openstack.convert_net_json'
-        example_cfg = {'version': 1, 'config': []}
+        mock_path = MOCK_PATH + "openstack.convert_net_json"
+        example_cfg = {"version": 1, "config": []}
         ds_os = ds.DataSourceOpenStack(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds_os._network_config = example_cfg
         with test_helpers.mock.patch(mock_path) as m_convert_json:
             self.assertEqual(example_cfg, ds_os.network_config)
@@ -394,22 +418,22 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
     def test_disabled_datasource(self):
         os_files = copy.deepcopy(OS_FILES)
         os_meta = copy.deepcopy(OSTACK_META)
-        os_meta['meta'] = {
-            'dsmode': 'disabled',
+        os_meta["meta"] = {
+            "dsmode": "disabled",
         }
         for k in list(os_files.keys()):
-            if k.endswith('meta_data.json'):
+            if k.endswith("meta_data.json"):
                 os_files[k] = json.dumps(os_meta)
         _register_uris(self.VERSION, {}, {}, os_files)
-        ds_os = ds.DataSourceOpenStack(settings.CFG_BUILTIN,
-                                       None,
-                                       helpers.Paths({'run_dir': self.tmp}))
+        ds_os = ds.DataSourceOpenStack(
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         ds_os.ds_cfg = {
-            'max_wait': 0,
-            'timeout': 0,
+            "max_wait": 0,
+            "timeout": 0,
         }
         self.assertIsNone(ds_os.version)
-        mock_path = MOCK_PATH + 'detect_openstack'
+        mock_path = MOCK_PATH + "detect_openstack"
         with test_helpers.mock.patch(mock_path) as m_detect_os:
             m_detect_os.return_value = True
             found = ds_os.get_data()
@@ -421,30 +445,42 @@ class TestOpenStackDataSource(test_helpers.HttprettyTestCase):
         """_crawl_metadata returns current metadata and does not cache."""
         _register_uris(self.VERSION, EC2_FILES, EC2_META, OS_FILES)
         ds_os = ds.DataSourceOpenStack(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         crawled_data = ds_os._crawl_metadata()
         self.assertEqual(UNSET, ds_os.ec2_metadata)
         self.assertIsNone(ds_os.userdata_raw)
         self.assertEqual(0, len(ds_os.files))
         self.assertIsNone(ds_os.vendordata_raw)
         self.assertEqual(
-            ['dsmode', 'ec2-metadata', 'files', 'metadata', 'networkdata',
-             'userdata', 'vendordata', 'vendordata2', 'version'],
-            sorted(crawled_data.keys()))
-        self.assertEqual('local', crawled_data['dsmode'])
-        self.assertEqual(EC2_META, crawled_data['ec2-metadata'])
-        self.assertEqual(2, len(crawled_data['files']))
-        md = copy.deepcopy(crawled_data['metadata'])
-        md.pop('instance-id')
-        md.pop('local-hostname')
+            [
+                "dsmode",
+                "ec2-metadata",
+                "files",
+                "metadata",
+                "networkdata",
+                "userdata",
+                "vendordata",
+                "vendordata2",
+                "version",
+            ],
+            sorted(crawled_data.keys()),
+        )
+        self.assertEqual("local", crawled_data["dsmode"])
+        self.assertEqual(EC2_META, crawled_data["ec2-metadata"])
+        self.assertEqual(2, len(crawled_data["files"]))
+        md = copy.deepcopy(crawled_data["metadata"])
+        md.pop("instance-id")
+        md.pop("local-hostname")
         self.assertEqual(OSTACK_META, md)
         self.assertEqual(
-            json.loads(OS_FILES['openstack/latest/network_data.json']),
-            crawled_data['networkdata'])
-        self.assertEqual(USER_DATA, crawled_data['userdata'])
-        self.assertEqual(VENDOR_DATA, crawled_data['vendordata'])
-        self.assertEqual(VENDOR_DATA2, crawled_data['vendordata2'])
-        self.assertEqual(2, crawled_data['version'])
+            json.loads(OS_FILES["openstack/latest/network_data.json"]),
+            crawled_data["networkdata"],
+        )
+        self.assertEqual(USER_DATA, crawled_data["userdata"])
+        self.assertEqual(VENDOR_DATA, crawled_data["vendordata"])
+        self.assertEqual(VENDOR_DATA2, crawled_data["vendordata2"])
+        self.assertEqual(2, crawled_data["version"])
 
 
 class TestVendorDataLoading(test_helpers.TestCase):
@@ -459,261 +495,289 @@ class TestVendorDataLoading(test_helpers.TestCase):
         self.assertEqual(self.cvj("foobar"), "foobar")
 
     def test_vd_load_list(self):
-        data = [{'foo': 'bar'}, 'mystring', list(['another', 'list'])]
+        data = [{"foo": "bar"}, "mystring", list(["another", "list"])]
         self.assertEqual(self.cvj(data), data)
 
     def test_vd_load_dict_no_ci(self):
-        self.assertIsNone(self.cvj({'foo': 'bar'}))
+        self.assertIsNone(self.cvj({"foo": "bar"}))
 
     def test_vd_load_dict_ci_dict(self):
-        self.assertRaises(ValueError, self.cvj,
-                          {'foo': 'bar', 'cloud-init': {'x': 1}})
+        self.assertRaises(
+            ValueError, self.cvj, {"foo": "bar", "cloud-init": {"x": 1}}
+        )
 
     def test_vd_load_dict_ci_string(self):
-        data = {'foo': 'bar', 'cloud-init': 'VENDOR_DATA'}
-        self.assertEqual(self.cvj(data), data['cloud-init'])
+        data = {"foo": "bar", "cloud-init": "VENDOR_DATA"}
+        self.assertEqual(self.cvj(data), data["cloud-init"])
 
     def test_vd_load_dict_ci_list(self):
-        data = {'foo': 'bar', 'cloud-init': ['VD_1', 'VD_2']}
-        self.assertEqual(self.cvj(data), data['cloud-init'])
+        data = {"foo": "bar", "cloud-init": ["VD_1", "VD_2"]}
+        self.assertEqual(self.cvj(data), data["cloud-init"])
 
 
-@test_helpers.mock.patch(MOCK_PATH + 'util.is_x86')
+@test_helpers.mock.patch(MOCK_PATH + "util.is_x86")
 class TestDetectOpenStack(test_helpers.CiTestCase):
-
     def test_detect_openstack_non_intel_x86(self, m_is_x86):
         """Return True on non-intel platforms because dmi isn't conclusive."""
         m_is_x86.return_value = False
         self.assertTrue(
-            ds.detect_openstack(), 'Expected detect_openstack == True')
-
-    @test_helpers.mock.patch(MOCK_PATH + 'util.get_proc_env')
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_not_detect_openstack_intel_x86_ec2(self, m_dmi, m_proc_env,
-                                                m_is_x86):
+            ds.detect_openstack(), "Expected detect_openstack == True"
+        )
+
+    @test_helpers.mock.patch(MOCK_PATH + "util.get_proc_env")
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_not_detect_openstack_intel_x86_ec2(
+        self, m_dmi, m_proc_env, m_is_x86
+    ):
         """Return False on EC2 platforms."""
         m_is_x86.return_value = True
         # No product_name in proc/1/environ
-        m_proc_env.return_value = {'HOME': '/'}
+        m_proc_env.return_value = {"HOME": "/"}
 
         def fake_dmi_read(dmi_key):
-            if dmi_key == 'system-product-name':
-                return 'HVM domU'  # Nothing 'openstackish' on EC2
-            if dmi_key == 'chassis-asset-tag':
-                return ''  # Empty string on EC2
-            assert False, 'Unexpected dmi read of %s' % dmi_key
+            if dmi_key == "system-product-name":
+                return "HVM domU"  # Nothing 'openstackish' on EC2
+            if dmi_key == "chassis-asset-tag":
+                return ""  # Empty string on EC2
+            assert False, "Unexpected dmi read of %s" % dmi_key
 
         m_dmi.side_effect = fake_dmi_read
         self.assertFalse(
-            ds.detect_openstack(), 'Expected detect_openstack == False on EC2')
+            ds.detect_openstack(), "Expected detect_openstack == False on EC2"
+        )
         m_proc_env.assert_called_with(1)
 
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_detect_openstack_intel_product_name_compute(self, m_dmi,
-                                                         m_is_x86):
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_detect_openstack_intel_product_name_compute(
+        self, m_dmi, m_is_x86
+    ):
         """Return True on OpenStack compute and nova instances."""
         m_is_x86.return_value = True
-        openstack_product_names = ['OpenStack Nova', 'OpenStack Compute']
+        openstack_product_names = ["OpenStack Nova", "OpenStack Compute"]
 
         for product_name in openstack_product_names:
             m_dmi.return_value = product_name
             self.assertTrue(
-                ds.detect_openstack(), 'Failed to detect_openstack')
+                ds.detect_openstack(), "Failed to detect_openstack"
+            )
 
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_detect_openstack_opentelekomcloud_chassis_asset_tag(self, m_dmi,
-                                                                 m_is_x86):
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_detect_openstack_opentelekomcloud_chassis_asset_tag(
+        self, m_dmi, m_is_x86
+    ):
         """Return True on OpenStack reporting OpenTelekomCloud asset-tag."""
         m_is_x86.return_value = True
 
         def fake_dmi_read(dmi_key):
-            if dmi_key == 'system-product-name':
-                return 'HVM domU'  # Nothing 'openstackish' on OpenTelekomCloud
-            if dmi_key == 'chassis-asset-tag':
-                return 'OpenTelekomCloud'
-            assert False, 'Unexpected dmi read of %s' % dmi_key
+            if dmi_key == "system-product-name":
+                return "HVM domU"  # Nothing 'openstackish' on OpenTelekomCloud
+            if dmi_key == "chassis-asset-tag":
+                return "OpenTelekomCloud"
+            assert False, "Unexpected dmi read of %s" % dmi_key
 
         m_dmi.side_effect = fake_dmi_read
         self.assertTrue(
             ds.detect_openstack(),
-            'Expected detect_openstack == True on OpenTelekomCloud')
+            "Expected detect_openstack == True on OpenTelekomCloud",
+        )
 
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_detect_openstack_sapccloud_chassis_asset_tag(self, m_dmi,
-                                                          m_is_x86):
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_detect_openstack_sapccloud_chassis_asset_tag(
+        self, m_dmi, m_is_x86
+    ):
         """Return True on OpenStack reporting SAP CCloud VM asset-tag."""
         m_is_x86.return_value = True
 
         def fake_dmi_read(dmi_key):
-            if dmi_key == 'system-product-name':
-                return 'VMware Virtual Platform'  # SAP CCloud uses VMware
-            if dmi_key == 'chassis-asset-tag':
-                return 'SAP CCloud VM'
-            assert False, 'Unexpected dmi read of %s' % dmi_key
+            if dmi_key == "system-product-name":
+                return "VMware Virtual Platform"  # SAP CCloud uses VMware
+            if dmi_key == "chassis-asset-tag":
+                return "SAP CCloud VM"
+            assert False, "Unexpected dmi read of %s" % dmi_key
 
         m_dmi.side_effect = fake_dmi_read
         self.assertTrue(
             ds.detect_openstack(),
-            'Expected detect_openstack == True on SAP CCloud VM')
+            "Expected detect_openstack == True on SAP CCloud VM",
+        )
 
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_detect_openstack_oraclecloud_chassis_asset_tag(self, m_dmi,
-                                                            m_is_x86):
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_detect_openstack_oraclecloud_chassis_asset_tag(
+        self, m_dmi, m_is_x86
+    ):
         """Return True on OpenStack reporting Oracle cloud asset-tag."""
         m_is_x86.return_value = True
 
         def fake_dmi_read(dmi_key):
-            if dmi_key == 'system-product-name':
-                return 'Standard PC (i440FX + PIIX, 1996)'  # No match
-            if dmi_key == 'chassis-asset-tag':
-                return 'OracleCloud.com'
-            assert False, 'Unexpected dmi read of %s' % dmi_key
+            if dmi_key == "system-product-name":
+                return "Standard PC (i440FX + PIIX, 1996)"  # No match
+            if dmi_key == "chassis-asset-tag":
+                return "OracleCloud.com"
+            assert False, "Unexpected dmi read of %s" % dmi_key
 
         m_dmi.side_effect = fake_dmi_read
         self.assertTrue(
             ds.detect_openstack(accept_oracle=True),
-            'Expected detect_openstack == True on OracleCloud.com')
+            "Expected detect_openstack == True on OracleCloud.com",
+        )
         self.assertFalse(
             ds.detect_openstack(accept_oracle=False),
-            'Expected detect_openstack == False.')
+            "Expected detect_openstack == False.",
+        )
 
-    def _test_detect_openstack_nova_compute_chassis_asset_tag(self, m_dmi,
-                                                              m_is_x86,
-                                                              chassis_tag):
+    def _test_detect_openstack_nova_compute_chassis_asset_tag(
+        self, m_dmi, m_is_x86, chassis_tag
+    ):
         """Return True on OpenStack reporting generic asset-tag."""
         m_is_x86.return_value = True
 
         def fake_dmi_read(dmi_key):
-            if dmi_key == 'system-product-name':
-                return 'Generic OpenStack Platform'
-            if dmi_key == 'chassis-asset-tag':
+            if dmi_key == "system-product-name":
+                return "Generic OpenStack Platform"
+            if dmi_key == "chassis-asset-tag":
                 return chassis_tag
-            assert False, 'Unexpected dmi read of %s' % dmi_key
+            assert False, "Unexpected dmi read of %s" % dmi_key
 
         m_dmi.side_effect = fake_dmi_read
         self.assertTrue(
             ds.detect_openstack(),
-            'Expected detect_openstack == True on Generic OpenStack Platform')
+            "Expected detect_openstack == True on Generic OpenStack Platform",
+        )
 
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_detect_openstack_nova_chassis_asset_tag(self, m_dmi,
-                                                     m_is_x86):
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_detect_openstack_nova_chassis_asset_tag(self, m_dmi, m_is_x86):
         self._test_detect_openstack_nova_compute_chassis_asset_tag(
-            m_dmi, m_is_x86, 'OpenStack Nova')
+            m_dmi, m_is_x86, "OpenStack Nova"
+        )
 
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_detect_openstack_compute_chassis_asset_tag(self, m_dmi,
-                                                        m_is_x86):
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_detect_openstack_compute_chassis_asset_tag(self, m_dmi, m_is_x86):
         self._test_detect_openstack_nova_compute_chassis_asset_tag(
-            m_dmi, m_is_x86, 'OpenStack Compute')
-
-    @test_helpers.mock.patch(MOCK_PATH + 'util.get_proc_env')
-    @test_helpers.mock.patch(MOCK_PATH + 'dmi.read_dmi_data')
-    def test_detect_openstack_by_proc_1_environ(self, m_dmi, m_proc_env,
-                                                m_is_x86):
+            m_dmi, m_is_x86, "OpenStack Compute"
+        )
+
+    @test_helpers.mock.patch(MOCK_PATH + "util.get_proc_env")
+    @test_helpers.mock.patch(MOCK_PATH + "dmi.read_dmi_data")
+    def test_detect_openstack_by_proc_1_environ(
+        self, m_dmi, m_proc_env, m_is_x86
+    ):
         """Return True when nova product_name specified in /proc/1/environ."""
         m_is_x86.return_value = True
         # Nova product_name in proc/1/environ
         m_proc_env.return_value = {
-            'HOME': '/', 'product_name': 'OpenStack Nova'}
+            "HOME": "/",
+            "product_name": "OpenStack Nova",
+        }
 
         def fake_dmi_read(dmi_key):
-            if dmi_key == 'system-product-name':
-                return 'HVM domU'  # Nothing 'openstackish'
-            if dmi_key == 'chassis-asset-tag':
-                return ''  # Nothin 'openstackish'
-            assert False, 'Unexpected dmi read of %s' % dmi_key
+            if dmi_key == "system-product-name":
+                return "HVM domU"  # Nothing 'openstackish'
+            if dmi_key == "chassis-asset-tag":
+                return ""  # Nothin 'openstackish'
+            assert False, "Unexpected dmi read of %s" % dmi_key
 
         m_dmi.side_effect = fake_dmi_read
         self.assertTrue(
             ds.detect_openstack(),
-            'Expected detect_openstack == True on OpenTelekomCloud')
+            "Expected detect_openstack == True on OpenTelekomCloud",
+        )
         m_proc_env.assert_called_with(1)
 
 
 class TestMetadataReader(test_helpers.HttprettyTestCase):
     """Test the MetadataReader."""
-    burl = 'http://169.254.169.254/'
+
+    burl = "http://169.254.169.254/"
     md_base = {
-        'availability_zone': 'myaz1',
-        'hostname': 'sm-foo-test.novalocal',
+        "availability_zone": "myaz1",
+        "hostname": "sm-foo-test.novalocal",
         "keys": [{"data": PUBKEY, "name": "brickies", "type": "ssh"}],
-        'launch_index': 0,
-        'name': 'sm-foo-test',
-        'public_keys': {'mykey': PUBKEY},
-        'project_id': '6a103f813b774b9fb15a4fcd36e1c056',
-        'uuid': 'b0fa911b-69d4-4476-bbe2-1c92bff6535c'}
+        "launch_index": 0,
+        "name": "sm-foo-test",
+        "public_keys": {"mykey": PUBKEY},
+        "project_id": "6a103f813b774b9fb15a4fcd36e1c056",
+        "uuid": "b0fa911b-69d4-4476-bbe2-1c92bff6535c",
+    }
 
     def register(self, path, body=None, status=200):
-        content = body if not isinstance(body, str) else body.encode('utf-8')
+        content = body if not isinstance(body, str) else body.encode("utf-8")
         hp.register_uri(
-            hp.GET, self.burl + "openstack" + path, status=status,
-            body=content)
+            hp.GET, self.burl + "openstack" + path, status=status, body=content
+        )
 
     def register_versions(self, versions):
-        self.register("", '\n'.join(versions))
-        self.register("/", '\n'.join(versions))
+        self.register("", "\n".join(versions))
+        self.register("/", "\n".join(versions))
 
     def register_version(self, version, data):
-        content = '\n'.join(sorted(data.keys()))
+        content = "\n".join(sorted(data.keys()))
         self.register(version, content)
         self.register(version + "/", content)
         for path, content in data.items():
             self.register("/%s/%s" % (version, path), content)
             self.register("/%s/%s" % (version, path), content)
-        if 'user_data' not in data:
+        if "user_data" not in data:
             self.register("/%s/user_data" % version, "nodata", status=404)
 
     def test__find_working_version(self):
         """Test a working version ignores unsupported."""
         unsup = "2016-11-09"
         self.register_versions(
-            [openstack.OS_FOLSOM, openstack.OS_LIBERTY, unsup,
-             openstack.OS_LATEST])
+            [
+                openstack.OS_FOLSOM,
+                openstack.OS_LIBERTY,
+                unsup,
+                openstack.OS_LATEST,
+            ]
+        )
         self.assertEqual(
             openstack.OS_LIBERTY,
-            openstack.MetadataReader(self.burl)._find_working_version())
+            openstack.MetadataReader(self.burl)._find_working_version(),
+        )
 
     def test__find_working_version_uses_latest(self):
         """'latest' should be used if no supported versions."""
-        unsup1, unsup2 = ("2016-11-09", '2017-06-06')
+        unsup1, unsup2 = ("2016-11-09", "2017-06-06")
         self.register_versions([unsup1, unsup2, openstack.OS_LATEST])
         self.assertEqual(
             openstack.OS_LATEST,
-            openstack.MetadataReader(self.burl)._find_working_version())
+            openstack.MetadataReader(self.burl)._find_working_version(),
+        )
 
     def test_read_v2_os_ocata(self):
         """Validate return value of read_v2 for os_ocata data."""
         md = copy.deepcopy(self.md_base)
-        md['devices'] = []
-        network_data = {'links': [], 'networks': [], 'services': []}
+        md["devices"] = []
+        network_data = {"links": [], "networks": [], "services": []}
         vendor_data = {}
         vendor_data2 = {"static": {}}
 
         data = {
-            'meta_data.json': json.dumps(md),
-            'network_data.json': json.dumps(network_data),
-            'vendor_data.json': json.dumps(vendor_data),
-            'vendor_data2.json': json.dumps(vendor_data2),
+            "meta_data.json": json.dumps(md),
+            "network_data.json": json.dumps(network_data),
+            "vendor_data.json": json.dumps(vendor_data),
+            "vendor_data2.json": json.dumps(vendor_data2),
         }
 
         self.register_versions([openstack.OS_OCATA, openstack.OS_LATEST])
         self.register_version(openstack.OS_OCATA, data)
 
         mock_read_ec2 = test_helpers.mock.MagicMock(
-            return_value={'instance-id': 'unused-ec2'})
+            return_value={"instance-id": "unused-ec2"}
+        )
         expected_md = copy.deepcopy(md)
         expected_md.update(
-            {'instance-id': md['uuid'], 'local-hostname': md['hostname']})
+            {"instance-id": md["uuid"], "local-hostname": md["hostname"]}
+        )
         expected = {
-            'userdata': '',  # Annoying, no user-data results in empty string.
-            'version': 2,
-            'metadata': expected_md,
-            'vendordata': vendor_data,
-            'vendordata2': vendor_data2,
-            'networkdata': network_data,
-            'ec2-metadata': mock_read_ec2.return_value,
-            'files': {},
+            "userdata": "",  # Annoying, no user-data results in empty string.
+            "version": 2,
+            "metadata": expected_md,
+            "vendordata": vendor_data,
+            "vendordata2": vendor_data2,
+            "networkdata": network_data,
+            "ec2-metadata": mock_read_ec2.return_value,
+            "files": {},
         }
         reader = openstack.MetadataReader(self.burl)
         reader._read_ec2_metadata = mock_read_ec2
diff --git a/tests/unittests/sources/test_oracle.py b/tests/unittests/sources/test_oracle.py
index 2aab097c..e0e79c8c 100644
--- a/tests/unittests/sources/test_oracle.py
+++ b/tests/unittests/sources/test_oracle.py
@@ -11,8 +11,8 @@ import pytest
 from cloudinit.sources import DataSourceOracle as oracle
 from cloudinit.sources import NetworkConfigSource
 from cloudinit.sources.DataSourceOracle import OpcMetadata
-from tests.unittests import helpers as test_helpers
 from cloudinit.url_helper import UrlError
+from tests.unittests import helpers as test_helpers
 
 DS_PATH = "cloudinit.sources.DataSourceOracle"
 
@@ -119,7 +119,9 @@ def oracle_ds(request, fixture_utils, paths, metadata_version):
                     return_value=metadata,
                 ):
                     yield oracle.DataSourceOracle(
-                        sys_cfg=sys_cfg, distro=mock.Mock(), paths=paths,
+                        sys_cfg=sys_cfg,
+                        distro=mock.Mock(),
+                        paths=paths,
                     )
 
 
@@ -129,18 +131,22 @@ class TestDataSourceOracle:
         assert "oracle" == oracle_ds.platform_type
 
     def test_subplatform_before_fetch(self, oracle_ds):
-        assert 'unknown' == oracle_ds.subplatform
+        assert "unknown" == oracle_ds.subplatform
 
     def test_platform_info_after_fetch(self, oracle_ds):
         oracle_ds._get_data()
-        assert 'metadata (http://169.254.169.254/opc/v2/)' == \
-            oracle_ds.subplatform
+        assert (
+            "metadata (http://169.254.169.254/opc/v2/)"
+            == oracle_ds.subplatform
+        )
 
-    @pytest.mark.parametrize('metadata_version', [1])
+    @pytest.mark.parametrize("metadata_version", [1])
     def test_v1_platform_info_after_fetch(self, oracle_ds):
         oracle_ds._get_data()
-        assert 'metadata (http://169.254.169.254/opc/v1/)' == \
-            oracle_ds.subplatform
+        assert (
+            "metadata (http://169.254.169.254/opc/v1/)"
+            == oracle_ds.subplatform
+        )
 
     def test_secondary_nics_disabled_by_default(self, oracle_ds):
         assert not oracle_ds.ds_cfg["configure_secondary_nics"]
@@ -153,29 +159,30 @@ class TestDataSourceOracle:
 
 
 class TestIsPlatformViable(test_helpers.CiTestCase):
-    @mock.patch(DS_PATH + ".dmi.read_dmi_data",
-                return_value=oracle.CHASSIS_ASSET_TAG)
+    @mock.patch(
+        DS_PATH + ".dmi.read_dmi_data", return_value=oracle.CHASSIS_ASSET_TAG
+    )
     def test_expected_viable(self, m_read_dmi_data):
         """System with known chassis tag is viable."""
         self.assertTrue(oracle._is_platform_viable())
-        m_read_dmi_data.assert_has_calls([mock.call('chassis-asset-tag')])
+        m_read_dmi_data.assert_has_calls([mock.call("chassis-asset-tag")])
 
     @mock.patch(DS_PATH + ".dmi.read_dmi_data", return_value=None)
     def test_expected_not_viable_dmi_data_none(self, m_read_dmi_data):
         """System without known chassis tag is not viable."""
         self.assertFalse(oracle._is_platform_viable())
-        m_read_dmi_data.assert_has_calls([mock.call('chassis-asset-tag')])
+        m_read_dmi_data.assert_has_calls([mock.call("chassis-asset-tag")])
 
     @mock.patch(DS_PATH + ".dmi.read_dmi_data", return_value="LetsGoCubs")
     def test_expected_not_viable_other(self, m_read_dmi_data):
         """System with unnown chassis tag is not viable."""
         self.assertFalse(oracle._is_platform_viable())
-        m_read_dmi_data.assert_has_calls([mock.call('chassis-asset-tag')])
+        m_read_dmi_data.assert_has_calls([mock.call("chassis-asset-tag")])
 
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestNetworkConfigFromOpcImds:
     def test_no_secondary_nics_does_not_mutate_input(self, oracle_ds):
@@ -192,222 +199,317 @@ class TestNetworkConfigFromOpcImds:
         # operations are used
         oracle_ds._network_config = object()
         oracle_ds._add_network_config_from_opc_imds()
-        assert 'bare metal machine' in caplog.text
+        assert "bare metal machine" in caplog.text
 
     def test_missing_mac_skipped(self, oracle_ds, caplog):
         oracle_ds._vnics_data = json.loads(OPC_VM_SECONDARY_VNIC_RESPONSE)
 
         oracle_ds._network_config = {
-            'version': 1, 'config': [{'primary': 'nic'}]
+            "version": 1,
+            "config": [{"primary": "nic"}],
         }
         with mock.patch(DS_PATH + ".get_interfaces_by_mac", return_value={}):
             oracle_ds._add_network_config_from_opc_imds()
 
-        assert 1 == len(oracle_ds.network_config['config'])
-        assert 'Interface with MAC 00:00:17:02:2b:b1 not found; skipping' in \
-            caplog.text
+        assert 1 == len(oracle_ds.network_config["config"])
+        assert (
+            "Interface with MAC 00:00:17:02:2b:b1 not found; skipping"
+            in caplog.text
+        )
 
     def test_missing_mac_skipped_v2(self, oracle_ds, caplog):
         oracle_ds._vnics_data = json.loads(OPC_VM_SECONDARY_VNIC_RESPONSE)
 
         oracle_ds._network_config = {
-            'version': 2, 'ethernets': {'primary': {'nic': {}}}
+            "version": 2,
+            "ethernets": {"primary": {"nic": {}}},
         }
         with mock.patch(DS_PATH + ".get_interfaces_by_mac", return_value={}):
             oracle_ds._add_network_config_from_opc_imds()
 
-        assert 1 == len(oracle_ds.network_config['ethernets'])
-        assert 'Interface with MAC 00:00:17:02:2b:b1 not found; skipping' in \
-            caplog.text
+        assert 1 == len(oracle_ds.network_config["ethernets"])
+        assert (
+            "Interface with MAC 00:00:17:02:2b:b1 not found; skipping"
+            in caplog.text
+        )
 
     def test_secondary_nic(self, oracle_ds):
         oracle_ds._vnics_data = json.loads(OPC_VM_SECONDARY_VNIC_RESPONSE)
         oracle_ds._network_config = {
-            'version': 1, 'config': [{'primary': 'nic'}]
+            "version": 1,
+            "config": [{"primary": "nic"}],
         }
-        mac_addr, nic_name = '00:00:17:02:2b:b1', 'ens3'
-        with mock.patch(DS_PATH + ".get_interfaces_by_mac",
-                        return_value={mac_addr: nic_name}):
+        mac_addr, nic_name = "00:00:17:02:2b:b1", "ens3"
+        with mock.patch(
+            DS_PATH + ".get_interfaces_by_mac",
+            return_value={mac_addr: nic_name},
+        ):
             oracle_ds._add_network_config_from_opc_imds()
 
         # The input is mutated
-        assert 2 == len(oracle_ds.network_config['config'])
+        assert 2 == len(oracle_ds.network_config["config"])
 
-        secondary_nic_cfg = oracle_ds.network_config['config'][1]
-        assert nic_name == secondary_nic_cfg['name']
-        assert 'physical' == secondary_nic_cfg['type']
-        assert mac_addr == secondary_nic_cfg['mac_address']
-        assert 9000 == secondary_nic_cfg['mtu']
+        secondary_nic_cfg = oracle_ds.network_config["config"][1]
+        assert nic_name == secondary_nic_cfg["name"]
+        assert "physical" == secondary_nic_cfg["type"]
+        assert mac_addr == secondary_nic_cfg["mac_address"]
+        assert 9000 == secondary_nic_cfg["mtu"]
 
-        assert 1 == len(secondary_nic_cfg['subnets'])
-        subnet_cfg = secondary_nic_cfg['subnets'][0]
+        assert 1 == len(secondary_nic_cfg["subnets"])
+        subnet_cfg = secondary_nic_cfg["subnets"][0]
         # These values are hard-coded in OPC_VM_SECONDARY_VNIC_RESPONSE
-        assert '10.0.0.231' == subnet_cfg['address']
+        assert "10.0.0.231" == subnet_cfg["address"]
 
     def test_secondary_nic_v2(self, oracle_ds):
         oracle_ds._vnics_data = json.loads(OPC_VM_SECONDARY_VNIC_RESPONSE)
         oracle_ds._network_config = {
-            'version': 2, 'ethernets': {'primary': {'nic': {}}}
+            "version": 2,
+            "ethernets": {"primary": {"nic": {}}},
         }
-        mac_addr, nic_name = '00:00:17:02:2b:b1', 'ens3'
-        with mock.patch(DS_PATH + ".get_interfaces_by_mac",
-                        return_value={mac_addr: nic_name}):
+        mac_addr, nic_name = "00:00:17:02:2b:b1", "ens3"
+        with mock.patch(
+            DS_PATH + ".get_interfaces_by_mac",
+            return_value={mac_addr: nic_name},
+        ):
             oracle_ds._add_network_config_from_opc_imds()
 
         # The input is mutated
-        assert 2 == len(oracle_ds.network_config['ethernets'])
+        assert 2 == len(oracle_ds.network_config["ethernets"])
 
-        secondary_nic_cfg = oracle_ds.network_config['ethernets']['ens3']
-        assert secondary_nic_cfg['dhcp4'] is False
-        assert secondary_nic_cfg['dhcp6'] is False
-        assert mac_addr == secondary_nic_cfg['match']['macaddress']
-        assert 9000 == secondary_nic_cfg['mtu']
+        secondary_nic_cfg = oracle_ds.network_config["ethernets"]["ens3"]
+        assert secondary_nic_cfg["dhcp4"] is False
+        assert secondary_nic_cfg["dhcp6"] is False
+        assert mac_addr == secondary_nic_cfg["match"]["macaddress"]
+        assert 9000 == secondary_nic_cfg["mtu"]
 
-        assert 1 == len(secondary_nic_cfg['addresses'])
+        assert 1 == len(secondary_nic_cfg["addresses"])
         # These values are hard-coded in OPC_VM_SECONDARY_VNIC_RESPONSE
-        assert '10.0.0.231' == secondary_nic_cfg['addresses'][0]
+        assert "10.0.0.231" == secondary_nic_cfg["addresses"][0]
 
 
 class TestNetworkConfigFiltersNetFailover(test_helpers.CiTestCase):
-
     def setUp(self):
         super(TestNetworkConfigFiltersNetFailover, self).setUp()
-        self.add_patch(DS_PATH + '.get_interfaces_by_mac',
-                       'm_get_interfaces_by_mac')
-        self.add_patch(DS_PATH + '.is_netfail_master', 'm_netfail_master')
+        self.add_patch(
+            DS_PATH + ".get_interfaces_by_mac", "m_get_interfaces_by_mac"
+        )
+        self.add_patch(DS_PATH + ".is_netfail_master", "m_netfail_master")
 
     def test_ignore_bogus_network_config(self):
-        netcfg = {'something': 'here'}
+        netcfg = {"something": "here"}
         passed_netcfg = copy.copy(netcfg)
         oracle._ensure_netfailover_safe(passed_netcfg)
         self.assertEqual(netcfg, passed_netcfg)
 
     def test_ignore_network_config_unknown_versions(self):
-        netcfg = {'something': 'here', 'version': 3}
+        netcfg = {"something": "here", "version": 3}
         passed_netcfg = copy.copy(netcfg)
         oracle._ensure_netfailover_safe(passed_netcfg)
         self.assertEqual(netcfg, passed_netcfg)
 
     def test_checks_v1_type_physical_interfaces(self):
-        mac_addr, nic_name = '00:00:17:02:2b:b1', 'ens3'
+        mac_addr, nic_name = "00:00:17:02:2b:b1", "ens3"
         self.m_get_interfaces_by_mac.return_value = {
             mac_addr: nic_name,
         }
-        netcfg = {'version': 1, 'config': [
-            {'type': 'physical', 'name': nic_name, 'mac_address': mac_addr,
-             'subnets': [{'type': 'dhcp4'}]}]}
+        netcfg = {
+            "version": 1,
+            "config": [
+                {
+                    "type": "physical",
+                    "name": nic_name,
+                    "mac_address": mac_addr,
+                    "subnets": [{"type": "dhcp4"}],
+                }
+            ],
+        }
         passed_netcfg = copy.copy(netcfg)
         self.m_netfail_master.return_value = False
         oracle._ensure_netfailover_safe(passed_netcfg)
         self.assertEqual(netcfg, passed_netcfg)
-        self.assertEqual([mock.call(nic_name)],
-                         self.m_netfail_master.call_args_list)
+        self.assertEqual(
+            [mock.call(nic_name)], self.m_netfail_master.call_args_list
+        )
 
     def test_checks_v1_skips_non_phys_interfaces(self):
-        mac_addr, nic_name = '00:00:17:02:2b:b1', 'bond0'
+        mac_addr, nic_name = "00:00:17:02:2b:b1", "bond0"
         self.m_get_interfaces_by_mac.return_value = {
             mac_addr: nic_name,
         }
-        netcfg = {'version': 1, 'config': [
-            {'type': 'bond', 'name': nic_name, 'mac_address': mac_addr,
-             'subnets': [{'type': 'dhcp4'}]}]}
+        netcfg = {
+            "version": 1,
+            "config": [
+                {
+                    "type": "bond",
+                    "name": nic_name,
+                    "mac_address": mac_addr,
+                    "subnets": [{"type": "dhcp4"}],
+                }
+            ],
+        }
         passed_netcfg = copy.copy(netcfg)
         oracle._ensure_netfailover_safe(passed_netcfg)
         self.assertEqual(netcfg, passed_netcfg)
         self.assertEqual(0, self.m_netfail_master.call_count)
 
     def test_removes_master_mac_property_v1(self):
-        nic_master, mac_master = 'ens3', self.random_string()
-        nic_other, mac_other = 'ens7', self.random_string()
-        nic_extra, mac_extra = 'enp0s1f2', self.random_string()
+        nic_master, mac_master = "ens3", self.random_string()
+        nic_other, mac_other = "ens7", self.random_string()
+        nic_extra, mac_extra = "enp0s1f2", self.random_string()
         self.m_get_interfaces_by_mac.return_value = {
             mac_master: nic_master,
             mac_other: nic_other,
             mac_extra: nic_extra,
         }
-        netcfg = {'version': 1, 'config': [
-            {'type': 'physical', 'name': nic_master,
-             'mac_address': mac_master},
-            {'type': 'physical', 'name': nic_other, 'mac_address': mac_other},
-            {'type': 'physical', 'name': nic_extra, 'mac_address': mac_extra},
-        ]}
+        netcfg = {
+            "version": 1,
+            "config": [
+                {
+                    "type": "physical",
+                    "name": nic_master,
+                    "mac_address": mac_master,
+                },
+                {
+                    "type": "physical",
+                    "name": nic_other,
+                    "mac_address": mac_other,
+                },
+                {
+                    "type": "physical",
+                    "name": nic_extra,
+                    "mac_address": mac_extra,
+                },
+            ],
+        }
 
         def _is_netfail_master(iface):
-            if iface == 'ens3':
+            if iface == "ens3":
                 return True
             return False
+
         self.m_netfail_master.side_effect = _is_netfail_master
-        expected_cfg = {'version': 1, 'config': [
-            {'type': 'physical', 'name': nic_master},
-            {'type': 'physical', 'name': nic_other, 'mac_address': mac_other},
-            {'type': 'physical', 'name': nic_extra, 'mac_address': mac_extra},
-        ]}
+        expected_cfg = {
+            "version": 1,
+            "config": [
+                {"type": "physical", "name": nic_master},
+                {
+                    "type": "physical",
+                    "name": nic_other,
+                    "mac_address": mac_other,
+                },
+                {
+                    "type": "physical",
+                    "name": nic_extra,
+                    "mac_address": mac_extra,
+                },
+            ],
+        }
         oracle._ensure_netfailover_safe(netcfg)
         self.assertEqual(expected_cfg, netcfg)
 
     def test_checks_v2_type_ethernet_interfaces(self):
-        mac_addr, nic_name = '00:00:17:02:2b:b1', 'ens3'
+        mac_addr, nic_name = "00:00:17:02:2b:b1", "ens3"
         self.m_get_interfaces_by_mac.return_value = {
             mac_addr: nic_name,
         }
-        netcfg = {'version': 2, 'ethernets': {
-            nic_name: {'dhcp4': True, 'critical': True, 'set-name': nic_name,
-                       'match': {'macaddress': mac_addr}}}}
+        netcfg = {
+            "version": 2,
+            "ethernets": {
+                nic_name: {
+                    "dhcp4": True,
+                    "critical": True,
+                    "set-name": nic_name,
+                    "match": {"macaddress": mac_addr},
+                }
+            },
+        }
         passed_netcfg = copy.copy(netcfg)
         self.m_netfail_master.return_value = False
         oracle._ensure_netfailover_safe(passed_netcfg)
         self.assertEqual(netcfg, passed_netcfg)
-        self.assertEqual([mock.call(nic_name)],
-                         self.m_netfail_master.call_args_list)
+        self.assertEqual(
+            [mock.call(nic_name)], self.m_netfail_master.call_args_list
+        )
 
     def test_skips_v2_non_ethernet_interfaces(self):
-        mac_addr, nic_name = '00:00:17:02:2b:b1', 'wlps0'
+        mac_addr, nic_name = "00:00:17:02:2b:b1", "wlps0"
         self.m_get_interfaces_by_mac.return_value = {
             mac_addr: nic_name,
         }
-        netcfg = {'version': 2, 'wifis': {
-            nic_name: {'dhcp4': True, 'critical': True, 'set-name': nic_name,
-                       'match': {'macaddress': mac_addr}}}}
+        netcfg = {
+            "version": 2,
+            "wifis": {
+                nic_name: {
+                    "dhcp4": True,
+                    "critical": True,
+                    "set-name": nic_name,
+                    "match": {"macaddress": mac_addr},
+                }
+            },
+        }
         passed_netcfg = copy.copy(netcfg)
         oracle._ensure_netfailover_safe(passed_netcfg)
         self.assertEqual(netcfg, passed_netcfg)
         self.assertEqual(0, self.m_netfail_master.call_count)
 
     def test_removes_master_mac_property_v2(self):
-        nic_master, mac_master = 'ens3', self.random_string()
-        nic_other, mac_other = 'ens7', self.random_string()
-        nic_extra, mac_extra = 'enp0s1f2', self.random_string()
+        nic_master, mac_master = "ens3", self.random_string()
+        nic_other, mac_other = "ens7", self.random_string()
+        nic_extra, mac_extra = "enp0s1f2", self.random_string()
         self.m_get_interfaces_by_mac.return_value = {
             mac_master: nic_master,
             mac_other: nic_other,
             mac_extra: nic_extra,
         }
-        netcfg = {'version': 2, 'ethernets': {
-            nic_extra: {'dhcp4': True, 'set-name': nic_extra,
-                        'match': {'macaddress': mac_extra}},
-            nic_other: {'dhcp4': True, 'set-name': nic_other,
-                        'match': {'macaddress': mac_other}},
-            nic_master: {'dhcp4': True, 'set-name': nic_master,
-                         'match': {'macaddress': mac_master}},
-        }}
+        netcfg = {
+            "version": 2,
+            "ethernets": {
+                nic_extra: {
+                    "dhcp4": True,
+                    "set-name": nic_extra,
+                    "match": {"macaddress": mac_extra},
+                },
+                nic_other: {
+                    "dhcp4": True,
+                    "set-name": nic_other,
+                    "match": {"macaddress": mac_other},
+                },
+                nic_master: {
+                    "dhcp4": True,
+                    "set-name": nic_master,
+                    "match": {"macaddress": mac_master},
+                },
+            },
+        }
 
         def _is_netfail_master(iface):
-            if iface == 'ens3':
+            if iface == "ens3":
                 return True
             return False
+
         self.m_netfail_master.side_effect = _is_netfail_master
 
-        expected_cfg = {'version': 2, 'ethernets': {
-            nic_master: {'dhcp4': True, 'match': {'name': nic_master}},
-            nic_extra: {'dhcp4': True, 'set-name': nic_extra,
-                        'match': {'macaddress': mac_extra}},
-            nic_other: {'dhcp4': True, 'set-name': nic_other,
-                        'match': {'macaddress': mac_other}},
-        }}
+        expected_cfg = {
+            "version": 2,
+            "ethernets": {
+                nic_master: {"dhcp4": True, "match": {"name": nic_master}},
+                nic_extra: {
+                    "dhcp4": True,
+                    "set-name": nic_extra,
+                    "match": {"macaddress": mac_extra},
+                },
+                nic_other: {
+                    "dhcp4": True,
+                    "set-name": nic_other,
+                    "match": {"macaddress": mac_other},
+                },
+            },
+        }
         oracle._ensure_netfailover_safe(netcfg)
         import pprint
+
         pprint.pprint(netcfg)
-        print('---- ^^ modified ^^ ---- vv original vv ----')
+        print("---- ^^ modified ^^ ---- vv original vv ----")
         pprint.pprint(expected_cfg)
         self.assertEqual(expected_cfg, netcfg)
 
@@ -425,12 +527,12 @@ def _mock_v2_urls(httpretty):
     httpretty.register_uri(
         httpretty.GET,
         "http://169.254.169.254/opc/v2/instance/",
-        body=instance_callback
+        body=instance_callback,
     )
     httpretty.register_uri(
         httpretty.GET,
         "http://169.254.169.254/opc/v2/vnics/",
-        body=vnics_callback
+        body=vnics_callback,
     )
 
 
@@ -443,12 +545,12 @@ def _mock_no_v2_urls(httpretty):
     httpretty.register_uri(
         httpretty.GET,
         "http://169.254.169.254/opc/v1/instance/",
-        body=OPC_V1_METADATA
+        body=OPC_V1_METADATA,
     )
     httpretty.register_uri(
         httpretty.GET,
         "http://169.254.169.254/opc/v1/vnics/",
-        body=OPC_BM_SECONDARY_VNIC_RESPONSE
+        body=OPC_BM_SECONDARY_VNIC_RESPONSE,
     )
 
 
@@ -459,18 +561,34 @@ class TestReadOpcMetadata:
 
     @mock.patch("cloudinit.url_helper.time.sleep", lambda _: None)
     @pytest.mark.parametrize(
-        'version,setup_urls,instance_data,fetch_vnics,vnics_data', [
-            (2, _mock_v2_urls, json.loads(OPC_V2_METADATA), True,
-             json.loads(OPC_BM_SECONDARY_VNIC_RESPONSE)),
+        "version,setup_urls,instance_data,fetch_vnics,vnics_data",
+        [
+            (
+                2,
+                _mock_v2_urls,
+                json.loads(OPC_V2_METADATA),
+                True,
+                json.loads(OPC_BM_SECONDARY_VNIC_RESPONSE),
+            ),
             (2, _mock_v2_urls, json.loads(OPC_V2_METADATA), False, None),
-            (1, _mock_no_v2_urls, json.loads(OPC_V1_METADATA), True,
-             json.loads(OPC_BM_SECONDARY_VNIC_RESPONSE)),
+            (
+                1,
+                _mock_no_v2_urls,
+                json.loads(OPC_V1_METADATA),
+                True,
+                json.loads(OPC_BM_SECONDARY_VNIC_RESPONSE),
+            ),
             (1, _mock_no_v2_urls, json.loads(OPC_V1_METADATA), False, None),
-        ]
+        ],
     )
     def test_metadata_returned(
-        self, version, setup_urls, instance_data,
-        fetch_vnics, vnics_data, httpretty
+        self,
+        version,
+        setup_urls,
+        instance_data,
+        fetch_vnics,
+        vnics_data,
+        httpretty,
     ):
         setup_urls(httpretty)
         metadata = oracle.read_opc_metadata(fetch_vnics_data=fetch_vnics)
@@ -490,10 +608,16 @@ class TestReadOpcMetadata:
             (3, 1, json.loads(OPC_V1_METADATA), does_not_raise()),
             (3, 2, json.loads(OPC_V1_METADATA), does_not_raise()),
             (3, 3, None, pytest.raises(UrlError)),
-        ]
+        ],
     )
-    def test_retries(self, v2_failure_count, v1_failure_count,
-                     expected_body, expectation, httpretty):
+    def test_retries(
+        self,
+        v2_failure_count,
+        v1_failure_count,
+        expected_body,
+        expectation,
+        httpretty,
+    ):
         v2_responses = [httpretty.Response("", status=404)] * v2_failure_count
         v2_responses.append(httpretty.Response(OPC_V2_METADATA))
         v1_responses = [httpretty.Response("", status=404)] * v1_failure_count
@@ -548,7 +672,8 @@ class TestCommon_GetDataBehaviour:
         DS_PATH + "._is_platform_viable", mock.Mock(return_value=False)
     )
     def test_false_if_platform_not_viable(
-        self, parameterized_oracle_ds,
+        self,
+        parameterized_oracle_ds,
     ):
         assert not parameterized_oracle_ds._get_data()
 
@@ -571,7 +696,10 @@ class TestCommon_GetDataBehaviour:
         ),
     )
     def test_metadata_keys_set_correctly(
-        self, keyname, expected_value, parameterized_oracle_ds,
+        self,
+        keyname,
+        expected_value,
+        parameterized_oracle_ds,
     ):
         assert parameterized_oracle_ds._get_data()
         assert expected_value == parameterized_oracle_ds.metadata[keyname]
@@ -591,7 +719,10 @@ class TestCommon_GetDataBehaviour:
         DS_PATH + "._read_system_uuid", mock.Mock(return_value="my-test-uuid")
     )
     def test_attributes_set_correctly(
-        self, attribute_name, expected_value, parameterized_oracle_ds,
+        self,
+        attribute_name,
+        expected_value,
+        parameterized_oracle_ds,
     ):
         assert parameterized_oracle_ds._get_data()
         assert expected_value == getattr(
@@ -624,7 +755,8 @@ class TestCommon_GetDataBehaviour:
             instance_data["metadata"]["ssh_authorized_keys"] = ssh_keys
         metadata = OpcMetadata(None, instance_data, None)
         with mock.patch(
-            DS_PATH + ".read_opc_metadata", mock.Mock(return_value=metadata),
+            DS_PATH + ".read_opc_metadata",
+            mock.Mock(return_value=metadata),
         ):
             assert parameterized_oracle_ds._get_data()
             assert (
@@ -638,7 +770,8 @@ class TestCommon_GetDataBehaviour:
         del instance_data["metadata"]["user_data"]
         metadata = OpcMetadata(None, instance_data, None)
         with mock.patch(
-            DS_PATH + ".read_opc_metadata", mock.Mock(return_value=metadata),
+            DS_PATH + ".read_opc_metadata",
+            mock.Mock(return_value=metadata),
         ):
             assert parameterized_oracle_ds._get_data()
 
@@ -651,7 +784,8 @@ class TestCommon_GetDataBehaviour:
         del instance_data["metadata"]
         metadata = OpcMetadata(None, instance_data, None)
         with mock.patch(
-            DS_PATH + ".read_opc_metadata", mock.Mock(return_value=metadata),
+            DS_PATH + ".read_opc_metadata",
+            mock.Mock(return_value=metadata),
         ):
             assert parameterized_oracle_ds._get_data()
 
@@ -697,11 +831,9 @@ class TestNonIscsiRoot_GetDataBehaviour:
             mock.call(
                 iface=m_find_fallback_nic.return_value,
                 connectivity_url_data={
-                    'headers': {
-                        'Authorization': 'Bearer Oracle'
-                    },
-                    'url': 'http://169.254.169.254/opc/v2/instance/'
-                }
+                    "headers": {"Authorization": "Bearer Oracle"},
+                    "url": "http://169.254.169.254/opc/v2/instance/",
+                },
             )
         ] == m_EphemeralDHCPv4.call_args_list
 
@@ -761,9 +893,10 @@ class TestNetworkConfig:
         def side_effect(self):
             self._network_config["secondary_added"] = mock.sentinel.needle
 
-        oracle_ds._vnics_data = 'DummyData'
+        oracle_ds._vnics_data = "DummyData"
         with mock.patch.object(
-            oracle.DataSourceOracle, "_add_network_config_from_opc_imds",
+            oracle.DataSourceOracle,
+            "_add_network_config_from_opc_imds",
             new=side_effect,
         ):
             was_secondary_added = "secondary_added" in oracle_ds.network_config
@@ -779,8 +912,9 @@ class TestNetworkConfig:
         oracle_ds._vnics_data = "DummyData"
 
         with mock.patch.object(
-            oracle.DataSourceOracle, "_add_network_config_from_opc_imds",
-            side_effect=Exception()
+            oracle.DataSourceOracle,
+            "_add_network_config_from_opc_imds",
+            side_effect=Exception(),
         ):
             network_config = oracle_ds.network_config
         assert network_config == m_read_initramfs_config.return_value
diff --git a/tests/unittests/sources/test_ovf.py b/tests/unittests/sources/test_ovf.py
index da516731..c2c87f12 100644
--- a/tests/unittests/sources/test_ovf.py
+++ b/tests/unittests/sources/test_ovf.py
@@ -6,20 +6,19 @@
 
 import base64
 import os
-
 from collections import OrderedDict
 from textwrap import dedent
 
-from cloudinit import subp
-from cloudinit import util
-from tests.unittests.helpers import CiTestCase, mock, wrap_and_call
+from cloudinit import subp, util
 from cloudinit.helpers import Paths
+from cloudinit.safeyaml import YAMLError
 from cloudinit.sources import DataSourceOVF as dsovf
 from cloudinit.sources.helpers.vmware.imc.config_custom_script import (
-    CustomScriptNotFound)
-from cloudinit.safeyaml import YAMLError
+    CustomScriptNotFound,
+)
+from tests.unittests.helpers import CiTestCase, mock, wrap_and_call
 
-MPATH = 'cloudinit.sources.DataSourceOVF.'
+MPATH = "cloudinit.sources.DataSourceOVF."
 
 NOT_FOUND = None
 
@@ -50,7 +49,7 @@ def fill_properties(props, template=OVF_ENV_CONTENT):
     for key, val in props.items():
         lines.append(prop_tmpl.format(key=key, val=val))
     indent = "        "
-    properties = ''.join([indent + line + "\n" for line in lines])
+    properties = "".join([indent + line + "\n" for line in lines])
     return template.format(properties=properties)
 
 
@@ -58,13 +57,16 @@ class TestReadOvfEnv(CiTestCase):
     def test_with_b64_userdata(self):
         user_data = "#!/bin/sh\necho hello world\n"
         user_data_b64 = base64.b64encode(user_data.encode()).decode()
-        props = {"user-data": user_data_b64, "password": "passw0rd",
-                 "instance-id": "inst-001"}
+        props = {
+            "user-data": user_data_b64,
+            "password": "passw0rd",
+            "instance-id": "inst-001",
+        }
         env = fill_properties(props)
         md, ud, cfg = dsovf.read_ovf_environment(env)
         self.assertEqual({"instance-id": "inst-001"}, md)
         self.assertEqual(user_data.encode(), ud)
-        self.assertEqual({'password': "passw0rd"}, cfg)
+        self.assertEqual({"password": "passw0rd"}, cfg)
 
     def test_with_non_b64_userdata(self):
         user_data = "my-user-data"
@@ -80,11 +82,12 @@ class TestReadOvfEnv(CiTestCase):
         env = fill_properties(props)
         md, ud, cfg = dsovf.read_ovf_environment(env)
         self.assertEqual({"instance-id": "inst-001"}, md)
-        self.assertEqual({'password': "passw0rd"}, cfg)
+        self.assertEqual({"password": "passw0rd"}, cfg)
         self.assertIsNone(ud)
 
     def test_with_b64_network_config_enable_read_network(self):
-        network_config = dedent("""\
+        network_config = dedent(
+            """\
         network:
            version: 2
            ethernets:
@@ -101,30 +104,41 @@ class TestReadOvfEnv(CiTestCase):
                  dhcp4: false
                  addresses:
                  - 10.10.10.1/24
-        """)
+        """
+        )
         network_config_b64 = base64.b64encode(network_config.encode()).decode()
-        props = {"network-config": network_config_b64,
-                 "password": "passw0rd",
-                 "instance-id": "inst-001"}
+        props = {
+            "network-config": network_config_b64,
+            "password": "passw0rd",
+            "instance-id": "inst-001",
+        }
         env = fill_properties(props)
         md, ud, cfg = dsovf.read_ovf_environment(env, True)
         self.assertEqual("inst-001", md["instance-id"])
-        self.assertEqual({'password': "passw0rd"}, cfg)
+        self.assertEqual({"password": "passw0rd"}, cfg)
         self.assertEqual(
-            {'version': 2, 'ethernets':
-                {'nics':
-                    {'nameservers':
-                        {'addresses': ['127.0.0.53'],
-                         'search': ['eng.vmware.com', 'vmware.com']},
-                     'match': {'name': 'eth*'},
-                     'gateway4': '10.10.10.253',
-                     'dhcp4': False,
-                     'addresses': ['10.10.10.1/24']}}},
-            md["network-config"])
+            {
+                "version": 2,
+                "ethernets": {
+                    "nics": {
+                        "nameservers": {
+                            "addresses": ["127.0.0.53"],
+                            "search": ["eng.vmware.com", "vmware.com"],
+                        },
+                        "match": {"name": "eth*"},
+                        "gateway4": "10.10.10.253",
+                        "dhcp4": False,
+                        "addresses": ["10.10.10.1/24"],
+                    }
+                },
+            },
+            md["network-config"],
+        )
         self.assertIsNone(ud)
 
     def test_with_non_b64_network_config_enable_read_network(self):
-        network_config = dedent("""\
+        network_config = dedent(
+            """\
         network:
            version: 2
            ethernets:
@@ -141,18 +155,22 @@ class TestReadOvfEnv(CiTestCase):
                  dhcp4: false
                  addresses:
                  - 10.10.10.1/24
-        """)
-        props = {"network-config": network_config,
-                 "password": "passw0rd",
-                 "instance-id": "inst-001"}
+        """
+        )
+        props = {
+            "network-config": network_config,
+            "password": "passw0rd",
+            "instance-id": "inst-001",
+        }
         env = fill_properties(props)
         md, ud, cfg = dsovf.read_ovf_environment(env, True)
         self.assertEqual({"instance-id": "inst-001"}, md)
-        self.assertEqual({'password': "passw0rd"}, cfg)
+        self.assertEqual({"password": "passw0rd"}, cfg)
         self.assertIsNone(ud)
 
     def test_with_b64_network_config_disable_read_network(self):
-        network_config = dedent("""\
+        network_config = dedent(
+            """\
         network:
            version: 2
            ethernets:
@@ -169,20 +187,22 @@ class TestReadOvfEnv(CiTestCase):
                  dhcp4: false
                  addresses:
                  - 10.10.10.1/24
-        """)
+        """
+        )
         network_config_b64 = base64.b64encode(network_config.encode()).decode()
-        props = {"network-config": network_config_b64,
-                 "password": "passw0rd",
-                 "instance-id": "inst-001"}
+        props = {
+            "network-config": network_config_b64,
+            "password": "passw0rd",
+            "instance-id": "inst-001",
+        }
         env = fill_properties(props)
         md, ud, cfg = dsovf.read_ovf_environment(env)
         self.assertEqual({"instance-id": "inst-001"}, md)
-        self.assertEqual({'password': "passw0rd"}, cfg)
+        self.assertEqual({"password": "passw0rd"}, cfg)
         self.assertIsNone(ud)
 
 
 class TestMarkerFiles(CiTestCase):
-
     def setUp(self):
         super(TestMarkerFiles, self).setUp()
         self.tdir = self.tmp_dir()
@@ -190,25 +210,23 @@ class TestMarkerFiles(CiTestCase):
     def test_false_when_markerid_none(self):
         """Return False when markerid provided is None."""
         self.assertFalse(
-            dsovf.check_marker_exists(markerid=None, marker_dir=self.tdir))
+            dsovf.check_marker_exists(markerid=None, marker_dir=self.tdir)
+        )
 
     def test_markerid_file_exist(self):
         """Return False when markerid file path does not exist,
         True otherwise."""
-        self.assertFalse(
-            dsovf.check_marker_exists('123', self.tdir))
+        self.assertFalse(dsovf.check_marker_exists("123", self.tdir))
 
-        marker_file = self.tmp_path('.markerfile-123.txt', self.tdir)
-        util.write_file(marker_file, '')
-        self.assertTrue(
-            dsovf.check_marker_exists('123', self.tdir)
-        )
+        marker_file = self.tmp_path(".markerfile-123.txt", self.tdir)
+        util.write_file(marker_file, "")
+        self.assertTrue(dsovf.check_marker_exists("123", self.tdir))
 
     def test_marker_file_setup(self):
         """Test creation of marker files."""
-        markerfilepath = self.tmp_path('.markerfile-hi.txt', self.tdir)
+        markerfilepath = self.tmp_path(".markerfile-hi.txt", self.tdir)
         self.assertFalse(os.path.exists(markerfilepath))
-        dsovf.setup_marker_files(markerid='hi', marker_dir=self.tdir)
+        dsovf.setup_marker_files(markerid="hi", marker_dir=self.tdir)
         self.assertTrue(os.path.exists(markerfilepath))
 
 
@@ -223,233 +241,298 @@ class TestDatasourceOVF(CiTestCase):
 
     def test_get_data_false_on_none_dmi_data(self):
         """When dmi for system-product-name is None, get_data returns False."""
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(sys_cfg={}, distro={}, paths=paths)
         retcode = wrap_and_call(
-            'cloudinit.sources.DataSourceOVF',
-            {'dmi.read_dmi_data': None,
-             'transport_iso9660': NOT_FOUND,
-             'transport_vmware_guestinfo': NOT_FOUND},
-            ds.get_data)
-        self.assertFalse(retcode, 'Expected False return from ds.get_data')
+            "cloudinit.sources.DataSourceOVF",
+            {
+                "dmi.read_dmi_data": None,
+                "transport_iso9660": NOT_FOUND,
+                "transport_vmware_guestinfo": NOT_FOUND,
+            },
+            ds.get_data,
+        )
+        self.assertFalse(retcode, "Expected False return from ds.get_data")
         self.assertIn(
-            'DEBUG: No system-product-name found', self.logs.getvalue())
+            "DEBUG: No system-product-name found", self.logs.getvalue()
+        )
 
     def test_get_data_vmware_customization_disabled(self):
         """When vmware customization is disabled via sys_cfg and
         allow_raw_data is disabled via ds_cfg, log a message.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': True,
-                     'datasource': {'OVF': {'allow_raw_data': False}}},
-            distro={}, paths=paths)
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+            sys_cfg={
+                "disable_vmware_customization": True,
+                "datasource": {"OVF": {"allow_raw_data": False}},
+            },
+            distro={},
+            paths=paths,
+        )
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [MISC]
             MARKER-ID = 12345345
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
         retcode = wrap_and_call(
-            'cloudinit.sources.DataSourceOVF',
-            {'dmi.read_dmi_data': 'vmware',
-             'transport_iso9660': NOT_FOUND,
-             'transport_vmware_guestinfo': NOT_FOUND,
-             'util.del_dir': True,
-             'search_file': self.tdir,
-             'wait_for_imc_cfg_file': conf_file},
-            ds.get_data)
-        self.assertFalse(retcode, 'Expected False return from ds.get_data')
+            "cloudinit.sources.DataSourceOVF",
+            {
+                "dmi.read_dmi_data": "vmware",
+                "transport_iso9660": NOT_FOUND,
+                "transport_vmware_guestinfo": NOT_FOUND,
+                "util.del_dir": True,
+                "search_file": self.tdir,
+                "wait_for_imc_cfg_file": conf_file,
+            },
+            ds.get_data,
+        )
+        self.assertFalse(retcode, "Expected False return from ds.get_data")
         self.assertIn(
-            'DEBUG: Customization for VMware platform is disabled.',
-            self.logs.getvalue())
+            "DEBUG: Customization for VMware platform is disabled.",
+            self.logs.getvalue(),
+        )
 
     def test_get_data_vmware_customization_sys_cfg_disabled(self):
         """When vmware customization is disabled via sys_cfg and
         no meta data is found, log a message.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': True,
-                     'datasource': {'OVF': {'allow_raw_data': True}}},
-            distro={}, paths=paths)
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+            sys_cfg={
+                "disable_vmware_customization": True,
+                "datasource": {"OVF": {"allow_raw_data": True}},
+            },
+            distro={},
+            paths=paths,
+        )
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [MISC]
             MARKER-ID = 12345345
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
         retcode = wrap_and_call(
-            'cloudinit.sources.DataSourceOVF',
-            {'dmi.read_dmi_data': 'vmware',
-             'transport_iso9660': NOT_FOUND,
-             'transport_vmware_guestinfo': NOT_FOUND,
-             'util.del_dir': True,
-             'search_file': self.tdir,
-             'wait_for_imc_cfg_file': conf_file},
-            ds.get_data)
-        self.assertFalse(retcode, 'Expected False return from ds.get_data')
+            "cloudinit.sources.DataSourceOVF",
+            {
+                "dmi.read_dmi_data": "vmware",
+                "transport_iso9660": NOT_FOUND,
+                "transport_vmware_guestinfo": NOT_FOUND,
+                "util.del_dir": True,
+                "search_file": self.tdir,
+                "wait_for_imc_cfg_file": conf_file,
+            },
+            ds.get_data,
+        )
+        self.assertFalse(retcode, "Expected False return from ds.get_data")
         self.assertIn(
-            'DEBUG: Customization using VMware config is disabled.',
-            self.logs.getvalue())
+            "DEBUG: Customization using VMware config is disabled.",
+            self.logs.getvalue(),
+        )
 
     def test_get_data_allow_raw_data_disabled(self):
         """When allow_raw_data is disabled via ds_cfg and
         meta data is found, log a message.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': False,
-                     'datasource': {'OVF': {'allow_raw_data': False}}},
-            distro={}, paths=paths)
+            sys_cfg={
+                "disable_vmware_customization": False,
+                "datasource": {"OVF": {"allow_raw_data": False}},
+            },
+            distro={},
+            paths=paths,
+        )
 
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CLOUDINIT]
             METADATA = test-meta
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
         # Prepare the meta data file
-        metadata_file = self.tmp_path('test-meta', self.tdir)
+        metadata_file = self.tmp_path("test-meta", self.tdir)
         util.write_file(metadata_file, "This is meta data")
         retcode = wrap_and_call(
-            'cloudinit.sources.DataSourceOVF',
-            {'dmi.read_dmi_data': 'vmware',
-             'transport_iso9660': NOT_FOUND,
-             'transport_vmware_guestinfo': NOT_FOUND,
-             'util.del_dir': True,
-             'search_file': self.tdir,
-             'wait_for_imc_cfg_file': conf_file,
-             'collect_imc_file_paths': [self.tdir + '/test-meta', '', '']},
-            ds.get_data)
-        self.assertFalse(retcode, 'Expected False return from ds.get_data')
+            "cloudinit.sources.DataSourceOVF",
+            {
+                "dmi.read_dmi_data": "vmware",
+                "transport_iso9660": NOT_FOUND,
+                "transport_vmware_guestinfo": NOT_FOUND,
+                "util.del_dir": True,
+                "search_file": self.tdir,
+                "wait_for_imc_cfg_file": conf_file,
+                "collect_imc_file_paths": [self.tdir + "/test-meta", "", ""],
+            },
+            ds.get_data,
+        )
+        self.assertFalse(retcode, "Expected False return from ds.get_data")
         self.assertIn(
-            'DEBUG: Customization using raw data is disabled.',
-            self.logs.getvalue())
+            "DEBUG: Customization using raw data is disabled.",
+            self.logs.getvalue(),
+        )
 
     def test_get_data_vmware_customization_enabled(self):
         """When cloud-init workflow for vmware is enabled via sys_cfg log a
         message.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': False}, distro={},
-            paths=paths)
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+            sys_cfg={"disable_vmware_customization": False},
+            distro={},
+            paths=paths,
+        )
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CUSTOM-SCRIPT]
             SCRIPT-NAME = test-script
             [MISC]
             MARKER-ID = 12345345
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
-        with mock.patch(MPATH + 'get_tools_config', return_value='true'):
+        with mock.patch(MPATH + "get_tools_config", return_value="true"):
             with self.assertRaises(CustomScriptNotFound) as context:
                 wrap_and_call(
-                    'cloudinit.sources.DataSourceOVF',
-                    {'dmi.read_dmi_data': 'vmware',
-                     'util.del_dir': True,
-                     'search_file': self.tdir,
-                     'wait_for_imc_cfg_file': conf_file,
-                     'get_nics_to_enable': ''},
-                    ds.get_data)
-        customscript = self.tmp_path('test-script', self.tdir)
-        self.assertIn('Script %s not found!!' % customscript,
-                      str(context.exception))
+                    "cloudinit.sources.DataSourceOVF",
+                    {
+                        "dmi.read_dmi_data": "vmware",
+                        "util.del_dir": True,
+                        "search_file": self.tdir,
+                        "wait_for_imc_cfg_file": conf_file,
+                        "get_nics_to_enable": "",
+                    },
+                    ds.get_data,
+                )
+        customscript = self.tmp_path("test-script", self.tdir)
+        self.assertIn(
+            "Script %s not found!!" % customscript, str(context.exception)
+        )
 
     def test_get_data_cust_script_disabled(self):
         """If custom script is disabled by VMware tools configuration,
         raise a RuntimeError.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': False}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": False},
+            distro={},
+            paths=paths,
+        )
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CUSTOM-SCRIPT]
             SCRIPT-NAME = test-script
             [MISC]
             MARKER-ID = 12345346
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
         # Prepare the custom sript
-        customscript = self.tmp_path('test-script', self.tdir)
+        customscript = self.tmp_path("test-script", self.tdir)
         util.write_file(customscript, "This is the post cust script")
 
-        with mock.patch(MPATH + 'get_tools_config', return_value='invalid'):
-            with mock.patch(MPATH + 'set_customization_status',
-                            return_value=('msg', b'')):
+        with mock.patch(MPATH + "get_tools_config", return_value="invalid"):
+            with mock.patch(
+                MPATH + "set_customization_status", return_value=("msg", b"")
+            ):
                 with self.assertRaises(RuntimeError) as context:
                     wrap_and_call(
-                        'cloudinit.sources.DataSourceOVF',
-                        {'dmi.read_dmi_data': 'vmware',
-                         'util.del_dir': True,
-                         'search_file': self.tdir,
-                         'wait_for_imc_cfg_file': conf_file,
-                         'get_nics_to_enable': ''},
-                        ds.get_data)
-        self.assertIn('Custom script is disabled by VM Administrator',
-                      str(context.exception))
+                        "cloudinit.sources.DataSourceOVF",
+                        {
+                            "dmi.read_dmi_data": "vmware",
+                            "util.del_dir": True,
+                            "search_file": self.tdir,
+                            "wait_for_imc_cfg_file": conf_file,
+                            "get_nics_to_enable": "",
+                        },
+                        ds.get_data,
+                    )
+        self.assertIn(
+            "Custom script is disabled by VM Administrator",
+            str(context.exception),
+        )
 
     def test_get_data_cust_script_enabled(self):
         """If custom script is enabled by VMware tools configuration,
         execute the script.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': False}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": False},
+            distro={},
+            paths=paths,
+        )
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CUSTOM-SCRIPT]
             SCRIPT-NAME = test-script
             [MISC]
             MARKER-ID = 12345346
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
 
         # Mock custom script is enabled by return true when calling
         # get_tools_config
-        with mock.patch(MPATH + 'get_tools_config', return_value="true"):
-            with mock.patch(MPATH + 'set_customization_status',
-                            return_value=('msg', b'')):
+        with mock.patch(MPATH + "get_tools_config", return_value="true"):
+            with mock.patch(
+                MPATH + "set_customization_status", return_value=("msg", b"")
+            ):
                 with self.assertRaises(CustomScriptNotFound) as context:
                     wrap_and_call(
-                        'cloudinit.sources.DataSourceOVF',
-                        {'dmi.read_dmi_data': 'vmware',
-                         'util.del_dir': True,
-                         'search_file': self.tdir,
-                         'wait_for_imc_cfg_file': conf_file,
-                         'get_nics_to_enable': ''},
-                        ds.get_data)
+                        "cloudinit.sources.DataSourceOVF",
+                        {
+                            "dmi.read_dmi_data": "vmware",
+                            "util.del_dir": True,
+                            "search_file": self.tdir,
+                            "wait_for_imc_cfg_file": conf_file,
+                            "get_nics_to_enable": "",
+                        },
+                        ds.get_data,
+                    )
         # Verify custom script is trying to be executed
-        customscript = self.tmp_path('test-script', self.tdir)
-        self.assertIn('Script %s not found!!' % customscript,
-                      str(context.exception))
+        customscript = self.tmp_path("test-script", self.tdir)
+        self.assertIn(
+            "Script %s not found!!" % customscript, str(context.exception)
+        )
 
     def test_get_data_force_run_post_script_is_yes(self):
         """If DEFAULT-RUN-POST-CUST-SCRIPT is yes, custom script could run if
         enable-custom-scripts is not defined in VM Tools configuration
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': False}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": False},
+            distro={},
+            paths=paths,
+        )
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
+        conf_file = self.tmp_path("test-cust", self.tdir)
         # set DEFAULT-RUN-POST-CUST-SCRIPT = yes so that enable-custom-scripts
         # default value is TRUE
-        conf_content = dedent("""\
+        conf_content = dedent(
+            """\
             [CUSTOM-SCRIPT]
             SCRIPT-NAME = test-script
             [MISC]
             MARKER-ID = 12345346
             DEFAULT-RUN-POST-CUST-SCRIPT = yes
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
 
         # Mock get_tools_config(section, key, defaultVal) to return
@@ -457,81 +540,89 @@ class TestDatasourceOVF(CiTestCase):
         def my_get_tools_config(*args, **kwargs):
             return args[2]
 
-        with mock.patch(MPATH + 'get_tools_config',
-                        side_effect=my_get_tools_config):
-            with mock.patch(MPATH + 'set_customization_status',
-                            return_value=('msg', b'')):
+        with mock.patch(
+            MPATH + "get_tools_config", side_effect=my_get_tools_config
+        ):
+            with mock.patch(
+                MPATH + "set_customization_status", return_value=("msg", b"")
+            ):
                 with self.assertRaises(CustomScriptNotFound) as context:
                     wrap_and_call(
-                        'cloudinit.sources.DataSourceOVF',
-                        {'dmi.read_dmi_data': 'vmware',
-                         'util.del_dir': True,
-                         'search_file': self.tdir,
-                         'wait_for_imc_cfg_file': conf_file,
-                         'get_nics_to_enable': ''},
-                        ds.get_data)
+                        "cloudinit.sources.DataSourceOVF",
+                        {
+                            "dmi.read_dmi_data": "vmware",
+                            "util.del_dir": True,
+                            "search_file": self.tdir,
+                            "wait_for_imc_cfg_file": conf_file,
+                            "get_nics_to_enable": "",
+                        },
+                        ds.get_data,
+                    )
         # Verify custom script still runs although it is
         # disabled by VMware Tools
-        customscript = self.tmp_path('test-script', self.tdir)
-        self.assertIn('Script %s not found!!' % customscript,
-                      str(context.exception))
+        customscript = self.tmp_path("test-script", self.tdir)
+        self.assertIn(
+            "Script %s not found!!" % customscript, str(context.exception)
+        )
 
     def test_get_data_non_vmware_seed_platform_info(self):
         """Platform info properly reports when on non-vmware platforms."""
-        paths = Paths({'cloud_dir': self.tdir, 'run_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir, "run_dir": self.tdir})
         # Write ovf-env.xml seed file
-        seed_dir = self.tmp_path('seed', dir=self.tdir)
-        ovf_env = self.tmp_path('ovf-env.xml', dir=seed_dir)
+        seed_dir = self.tmp_path("seed", dir=self.tdir)
+        ovf_env = self.tmp_path("ovf-env.xml", dir=seed_dir)
         util.write_file(ovf_env, OVF_ENV_CONTENT)
         ds = self.datasource(sys_cfg={}, distro={}, paths=paths)
 
-        self.assertEqual('ovf', ds.cloud_name)
-        self.assertEqual('ovf', ds.platform_type)
-        with mock.patch(MPATH + 'dmi.read_dmi_data', return_value='!VMware'):
-            with mock.patch(MPATH + 'transport_vmware_guestinfo') as m_guestd:
-                with mock.patch(MPATH + 'transport_iso9660') as m_iso9660:
+        self.assertEqual("ovf", ds.cloud_name)
+        self.assertEqual("ovf", ds.platform_type)
+        with mock.patch(MPATH + "dmi.read_dmi_data", return_value="!VMware"):
+            with mock.patch(MPATH + "transport_vmware_guestinfo") as m_guestd:
+                with mock.patch(MPATH + "transport_iso9660") as m_iso9660:
                     m_iso9660.return_value = NOT_FOUND
                     m_guestd.return_value = NOT_FOUND
                     self.assertTrue(ds.get_data())
                     self.assertEqual(
-                        'ovf (%s/seed/ovf-env.xml)' % self.tdir,
-                        ds.subplatform)
+                        "ovf (%s/seed/ovf-env.xml)" % self.tdir, ds.subplatform
+                    )
 
     def test_get_data_vmware_seed_platform_info(self):
         """Platform info properly reports when on VMware platform."""
-        paths = Paths({'cloud_dir': self.tdir, 'run_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir, "run_dir": self.tdir})
         # Write ovf-env.xml seed file
-        seed_dir = self.tmp_path('seed', dir=self.tdir)
-        ovf_env = self.tmp_path('ovf-env.xml', dir=seed_dir)
+        seed_dir = self.tmp_path("seed", dir=self.tdir)
+        ovf_env = self.tmp_path("ovf-env.xml", dir=seed_dir)
         util.write_file(ovf_env, OVF_ENV_CONTENT)
         ds = self.datasource(sys_cfg={}, distro={}, paths=paths)
 
-        self.assertEqual('ovf', ds.cloud_name)
-        self.assertEqual('ovf', ds.platform_type)
-        with mock.patch(MPATH + 'dmi.read_dmi_data', return_value='VMWare'):
-            with mock.patch(MPATH + 'transport_vmware_guestinfo') as m_guestd:
-                with mock.patch(MPATH + 'transport_iso9660') as m_iso9660:
+        self.assertEqual("ovf", ds.cloud_name)
+        self.assertEqual("ovf", ds.platform_type)
+        with mock.patch(MPATH + "dmi.read_dmi_data", return_value="VMWare"):
+            with mock.patch(MPATH + "transport_vmware_guestinfo") as m_guestd:
+                with mock.patch(MPATH + "transport_iso9660") as m_iso9660:
                     m_iso9660.return_value = NOT_FOUND
                     m_guestd.return_value = NOT_FOUND
                     self.assertTrue(ds.get_data())
                     self.assertEqual(
-                        'vmware (%s/seed/ovf-env.xml)' % self.tdir,
-                        ds.subplatform)
+                        "vmware (%s/seed/ovf-env.xml)" % self.tdir,
+                        ds.subplatform,
+                    )
 
-    @mock.patch('cloudinit.subp.subp')
-    @mock.patch('cloudinit.sources.DataSource.persist_instance_data')
+    @mock.patch("cloudinit.subp.subp")
+    @mock.patch("cloudinit.sources.DataSource.persist_instance_data")
     def test_get_data_vmware_guestinfo_with_network_config(
         self, m_persist, m_subp
     ):
         self._test_get_data_with_network_config(guestinfo=False, iso=True)
 
-    @mock.patch('cloudinit.subp.subp')
-    @mock.patch('cloudinit.sources.DataSource.persist_instance_data')
+    @mock.patch("cloudinit.subp.subp")
+    @mock.patch("cloudinit.sources.DataSource.persist_instance_data")
     def test_get_data_iso9660_with_network_config(self, m_persist, m_subp):
         self._test_get_data_with_network_config(guestinfo=True, iso=False)
 
     def _test_get_data_with_network_config(self, guestinfo, iso):
-        network_config = dedent("""\
+        network_config = dedent(
+            """\
         network:
            version: 2
            ethernets:
@@ -547,50 +638,69 @@ class TestDatasourceOVF(CiTestCase):
                  dhcp4: false
                  addresses:
                  - 10.10.10.1/24
-        """)
+        """
+        )
         network_config_b64 = base64.b64encode(network_config.encode()).decode()
-        props = {"network-config": network_config_b64,
-                 "password": "passw0rd",
-                 "instance-id": "inst-001"}
+        props = {
+            "network-config": network_config_b64,
+            "password": "passw0rd",
+            "instance-id": "inst-001",
+        }
         env = fill_properties(props)
-        paths = Paths({'cloud_dir': self.tdir, 'run_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir, "run_dir": self.tdir})
         ds = self.datasource(sys_cfg={}, distro={}, paths=paths)
-        with mock.patch(MPATH + 'transport_vmware_guestinfo',
-                        return_value=env if guestinfo else NOT_FOUND):
-            with mock.patch(MPATH + 'transport_iso9660',
-                            return_value=env if iso else NOT_FOUND):
+        with mock.patch(
+            MPATH + "transport_vmware_guestinfo",
+            return_value=env if guestinfo else NOT_FOUND,
+        ):
+            with mock.patch(
+                MPATH + "transport_iso9660",
+                return_value=env if iso else NOT_FOUND,
+            ):
                 self.assertTrue(ds.get_data())
-                self.assertEqual('inst-001', ds.metadata['instance-id'])
+                self.assertEqual("inst-001", ds.metadata["instance-id"])
                 self.assertEqual(
-                    {'version': 2, 'ethernets':
-                        {'nics':
-                            {'nameservers':
-                                {'addresses': ['127.0.0.53'],
-                                 'search': ['vmware.com']},
-                             'match': {'name': 'eth*'},
-                             'gateway4': '10.10.10.253',
-                             'dhcp4': False,
-                             'addresses': ['10.10.10.1/24']}}},
-                    ds.network_config)
+                    {
+                        "version": 2,
+                        "ethernets": {
+                            "nics": {
+                                "nameservers": {
+                                    "addresses": ["127.0.0.53"],
+                                    "search": ["vmware.com"],
+                                },
+                                "match": {"name": "eth*"},
+                                "gateway4": "10.10.10.253",
+                                "dhcp4": False,
+                                "addresses": ["10.10.10.1/24"],
+                            }
+                        },
+                    },
+                    ds.network_config,
+                )
 
     def test_get_data_cloudinit_metadata_json(self):
         """Test metadata can be loaded to cloud-init metadata and network.
         The metadata format is json.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': True}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": True},
+            distro={},
+            paths=paths,
+        )
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CLOUDINIT]
             METADATA = test-meta
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
         # Prepare the meta data file
-        metadata_file = self.tmp_path('test-meta', self.tdir)
-        metadata_content = dedent("""\
+        metadata_file = self.tmp_path("test-meta", self.tdir)
+        metadata_content = dedent(
+            """\
             {
               "instance-id": "cloud-vm",
               "local-hostname": "my-host.domain.com",
@@ -606,45 +716,59 @@ class TestDatasourceOVF(CiTestCase):
                 }
               }
             }
-            """)
+            """
+        )
         util.write_file(metadata_file, metadata_content)
 
-        with mock.patch(MPATH + 'set_customization_status',
-                        return_value=('msg', b'')):
+        with mock.patch(
+            MPATH + "set_customization_status", return_value=("msg", b"")
+        ):
             result = wrap_and_call(
-                'cloudinit.sources.DataSourceOVF',
-                {'dmi.read_dmi_data': 'vmware',
-                 'util.del_dir': True,
-                 'search_file': self.tdir,
-                 'wait_for_imc_cfg_file': conf_file,
-                 'collect_imc_file_paths': [self.tdir + '/test-meta', '', ''],
-                 'get_nics_to_enable': ''},
-                ds._get_data)
+                "cloudinit.sources.DataSourceOVF",
+                {
+                    "dmi.read_dmi_data": "vmware",
+                    "util.del_dir": True,
+                    "search_file": self.tdir,
+                    "wait_for_imc_cfg_file": conf_file,
+                    "collect_imc_file_paths": [
+                        self.tdir + "/test-meta",
+                        "",
+                        "",
+                    ],
+                    "get_nics_to_enable": "",
+                },
+                ds._get_data,
+            )
 
         self.assertTrue(result)
-        self.assertEqual("cloud-vm", ds.metadata['instance-id'])
-        self.assertEqual("my-host.domain.com", ds.metadata['local-hostname'])
-        self.assertEqual(2, ds.network_config['version'])
-        self.assertTrue(ds.network_config['ethernets']['eths']['dhcp4'])
+        self.assertEqual("cloud-vm", ds.metadata["instance-id"])
+        self.assertEqual("my-host.domain.com", ds.metadata["local-hostname"])
+        self.assertEqual(2, ds.network_config["version"])
+        self.assertTrue(ds.network_config["ethernets"]["eths"]["dhcp4"])
 
     def test_get_data_cloudinit_metadata_yaml(self):
         """Test metadata can be loaded to cloud-init metadata and network.
         The metadata format is yaml.
         """
-        paths = Paths({'cloud_dir': self.tdir})
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': True}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": True},
+            distro={},
+            paths=paths,
+        )
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CLOUDINIT]
             METADATA = test-meta
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
         # Prepare the meta data file
-        metadata_file = self.tmp_path('test-meta', self.tdir)
-        metadata_content = dedent("""\
+        metadata_file = self.tmp_path("test-meta", self.tdir)
+        metadata_content = dedent(
+            """\
             instance-id: cloud-vm
             local-hostname: my-host.domain.com
             network:
@@ -654,116 +778,147 @@ class TestDatasourceOVF(CiTestCase):
                         match:
                             name: ens*
                         dhcp4: yes
-            """)
+            """
+        )
         util.write_file(metadata_file, metadata_content)
 
-        with mock.patch(MPATH + 'set_customization_status',
-                        return_value=('msg', b'')):
+        with mock.patch(
+            MPATH + "set_customization_status", return_value=("msg", b"")
+        ):
             result = wrap_and_call(
-                'cloudinit.sources.DataSourceOVF',
-                {'dmi.read_dmi_data': 'vmware',
-                 'util.del_dir': True,
-                 'search_file': self.tdir,
-                 'wait_for_imc_cfg_file': conf_file,
-                 'collect_imc_file_paths': [self.tdir + '/test-meta', '', ''],
-                 'get_nics_to_enable': ''},
-                ds._get_data)
+                "cloudinit.sources.DataSourceOVF",
+                {
+                    "dmi.read_dmi_data": "vmware",
+                    "util.del_dir": True,
+                    "search_file": self.tdir,
+                    "wait_for_imc_cfg_file": conf_file,
+                    "collect_imc_file_paths": [
+                        self.tdir + "/test-meta",
+                        "",
+                        "",
+                    ],
+                    "get_nics_to_enable": "",
+                },
+                ds._get_data,
+            )
 
         self.assertTrue(result)
-        self.assertEqual("cloud-vm", ds.metadata['instance-id'])
-        self.assertEqual("my-host.domain.com", ds.metadata['local-hostname'])
-        self.assertEqual(2, ds.network_config['version'])
-        self.assertTrue(ds.network_config['ethernets']['nics']['dhcp4'])
+        self.assertEqual("cloud-vm", ds.metadata["instance-id"])
+        self.assertEqual("my-host.domain.com", ds.metadata["local-hostname"])
+        self.assertEqual(2, ds.network_config["version"])
+        self.assertTrue(ds.network_config["ethernets"]["nics"]["dhcp4"])
 
     def test_get_data_cloudinit_metadata_not_valid(self):
-        """Test metadata is not JSON or YAML format.
-        """
-        paths = Paths({'cloud_dir': self.tdir})
+        """Test metadata is not JSON or YAML format."""
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': True}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": True},
+            distro={},
+            paths=paths,
+        )
 
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CLOUDINIT]
             METADATA = test-meta
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
 
         # Prepare the meta data file
-        metadata_file = self.tmp_path('test-meta', self.tdir)
+        metadata_file = self.tmp_path("test-meta", self.tdir)
         metadata_content = "[This is not json or yaml format]a=b"
         util.write_file(metadata_file, metadata_content)
 
-        with mock.patch(MPATH + 'set_customization_status',
-                        return_value=('msg', b'')):
+        with mock.patch(
+            MPATH + "set_customization_status", return_value=("msg", b"")
+        ):
             with self.assertRaises(YAMLError) as context:
                 wrap_and_call(
-                    'cloudinit.sources.DataSourceOVF',
-                    {'dmi.read_dmi_data': 'vmware',
-                     'util.del_dir': True,
-                     'search_file': self.tdir,
-                     'wait_for_imc_cfg_file': conf_file,
-                     'collect_imc_file_paths': [
-                         self.tdir + '/test-meta', '', ''
-                     ],
-                     'get_nics_to_enable': ''},
-                    ds.get_data)
-
-        self.assertIn("expected '<document start>', but found '<scalar>'",
-                      str(context.exception))
+                    "cloudinit.sources.DataSourceOVF",
+                    {
+                        "dmi.read_dmi_data": "vmware",
+                        "util.del_dir": True,
+                        "search_file": self.tdir,
+                        "wait_for_imc_cfg_file": conf_file,
+                        "collect_imc_file_paths": [
+                            self.tdir + "/test-meta",
+                            "",
+                            "",
+                        ],
+                        "get_nics_to_enable": "",
+                    },
+                    ds.get_data,
+                )
+
+        self.assertIn(
+            "expected '<document start>', but found '<scalar>'",
+            str(context.exception),
+        )
 
     def test_get_data_cloudinit_metadata_not_found(self):
-        """Test metadata file can't be found.
-        """
-        paths = Paths({'cloud_dir': self.tdir})
+        """Test metadata file can't be found."""
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': True}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": True},
+            distro={},
+            paths=paths,
+        )
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CLOUDINIT]
             METADATA = test-meta
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
         # Don't prepare the meta data file
 
-        with mock.patch(MPATH + 'set_customization_status',
-                        return_value=('msg', b'')):
+        with mock.patch(
+            MPATH + "set_customization_status", return_value=("msg", b"")
+        ):
             with self.assertRaises(FileNotFoundError) as context:
                 wrap_and_call(
-                    'cloudinit.sources.DataSourceOVF',
-                    {'dmi.read_dmi_data': 'vmware',
-                     'util.del_dir': True,
-                     'search_file': self.tdir,
-                     'wait_for_imc_cfg_file': conf_file,
-                     'get_nics_to_enable': ''},
-                    ds.get_data)
+                    "cloudinit.sources.DataSourceOVF",
+                    {
+                        "dmi.read_dmi_data": "vmware",
+                        "util.del_dir": True,
+                        "search_file": self.tdir,
+                        "wait_for_imc_cfg_file": conf_file,
+                        "get_nics_to_enable": "",
+                    },
+                    ds.get_data,
+                )
 
-        self.assertIn('is not found', str(context.exception))
+        self.assertIn("is not found", str(context.exception))
 
     def test_get_data_cloudinit_userdata(self):
-        """Test user data can be loaded to cloud-init user data.
-        """
-        paths = Paths({'cloud_dir': self.tdir})
+        """Test user data can be loaded to cloud-init user data."""
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': False}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": False},
+            distro={},
+            paths=paths,
+        )
 
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CLOUDINIT]
             METADATA = test-meta
             USERDATA = test-user
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
 
         # Prepare the meta data file
-        metadata_file = self.tmp_path('test-meta', self.tdir)
-        metadata_content = dedent("""\
+        metadata_file = self.tmp_path("test-meta", self.tdir)
+        metadata_content = dedent(
+            """\
             instance-id: cloud-vm
             local-hostname: my-host.domain.com
             network:
@@ -773,51 +928,63 @@ class TestDatasourceOVF(CiTestCase):
                         match:
                             name: ens*
                         dhcp4: yes
-            """)
+            """
+        )
         util.write_file(metadata_file, metadata_content)
 
         # Prepare the user data file
-        userdata_file = self.tmp_path('test-user', self.tdir)
+        userdata_file = self.tmp_path("test-user", self.tdir)
         userdata_content = "This is the user data"
         util.write_file(userdata_file, userdata_content)
 
-        with mock.patch(MPATH + 'set_customization_status',
-                        return_value=('msg', b'')):
+        with mock.patch(
+            MPATH + "set_customization_status", return_value=("msg", b"")
+        ):
             result = wrap_and_call(
-                'cloudinit.sources.DataSourceOVF',
-                {'dmi.read_dmi_data': 'vmware',
-                 'util.del_dir': True,
-                 'search_file': self.tdir,
-                 'wait_for_imc_cfg_file': conf_file,
-                 'collect_imc_file_paths': [self.tdir + '/test-meta',
-                                            self.tdir + '/test-user', ''],
-                 'get_nics_to_enable': ''},
-                ds._get_data)
+                "cloudinit.sources.DataSourceOVF",
+                {
+                    "dmi.read_dmi_data": "vmware",
+                    "util.del_dir": True,
+                    "search_file": self.tdir,
+                    "wait_for_imc_cfg_file": conf_file,
+                    "collect_imc_file_paths": [
+                        self.tdir + "/test-meta",
+                        self.tdir + "/test-user",
+                        "",
+                    ],
+                    "get_nics_to_enable": "",
+                },
+                ds._get_data,
+            )
 
         self.assertTrue(result)
-        self.assertEqual("cloud-vm", ds.metadata['instance-id'])
+        self.assertEqual("cloud-vm", ds.metadata["instance-id"])
         self.assertEqual(userdata_content, ds.userdata_raw)
 
     def test_get_data_cloudinit_userdata_not_found(self):
-        """Test userdata file can't be found.
-        """
-        paths = Paths({'cloud_dir': self.tdir})
+        """Test userdata file can't be found."""
+        paths = Paths({"cloud_dir": self.tdir})
         ds = self.datasource(
-            sys_cfg={'disable_vmware_customization': True}, distro={},
-            paths=paths)
+            sys_cfg={"disable_vmware_customization": True},
+            distro={},
+            paths=paths,
+        )
 
         # Prepare the conf file
-        conf_file = self.tmp_path('test-cust', self.tdir)
-        conf_content = dedent("""\
+        conf_file = self.tmp_path("test-cust", self.tdir)
+        conf_content = dedent(
+            """\
             [CLOUDINIT]
             METADATA = test-meta
             USERDATA = test-user
-            """)
+            """
+        )
         util.write_file(conf_file, conf_content)
 
         # Prepare the meta data file
-        metadata_file = self.tmp_path('test-meta', self.tdir)
-        metadata_content = dedent("""\
+        metadata_file = self.tmp_path("test-meta", self.tdir)
+        metadata_content = dedent(
+            """\
             instance-id: cloud-vm
             local-hostname: my-host.domain.com
             network:
@@ -827,45 +994,49 @@ class TestDatasourceOVF(CiTestCase):
                         match:
                             name: ens*
                         dhcp4: yes
-            """)
+            """
+        )
         util.write_file(metadata_file, metadata_content)
 
         # Don't prepare the user data file
 
-        with mock.patch(MPATH + 'set_customization_status',
-                        return_value=('msg', b'')):
+        with mock.patch(
+            MPATH + "set_customization_status", return_value=("msg", b"")
+        ):
             with self.assertRaises(FileNotFoundError) as context:
                 wrap_and_call(
-                    'cloudinit.sources.DataSourceOVF',
-                    {'dmi.read_dmi_data': 'vmware',
-                     'util.del_dir': True,
-                     'search_file': self.tdir,
-                     'wait_for_imc_cfg_file': conf_file,
-                     'get_nics_to_enable': ''},
-                    ds.get_data)
+                    "cloudinit.sources.DataSourceOVF",
+                    {
+                        "dmi.read_dmi_data": "vmware",
+                        "util.del_dir": True,
+                        "search_file": self.tdir,
+                        "wait_for_imc_cfg_file": conf_file,
+                        "get_nics_to_enable": "",
+                    },
+                    ds.get_data,
+                )
 
-        self.assertIn('is not found', str(context.exception))
+        self.assertIn("is not found", str(context.exception))
 
 
 class TestTransportIso9660(CiTestCase):
-
     def setUp(self):
         super(TestTransportIso9660, self).setUp()
-        self.add_patch('cloudinit.util.find_devs_with',
-                       'm_find_devs_with')
-        self.add_patch('cloudinit.util.mounts', 'm_mounts')
-        self.add_patch('cloudinit.util.mount_cb', 'm_mount_cb')
-        self.add_patch('cloudinit.sources.DataSourceOVF.get_ovf_env',
-                       'm_get_ovf_env')
-        self.m_get_ovf_env.return_value = ('myfile', 'mycontent')
+        self.add_patch("cloudinit.util.find_devs_with", "m_find_devs_with")
+        self.add_patch("cloudinit.util.mounts", "m_mounts")
+        self.add_patch("cloudinit.util.mount_cb", "m_mount_cb")
+        self.add_patch(
+            "cloudinit.sources.DataSourceOVF.get_ovf_env", "m_get_ovf_env"
+        )
+        self.m_get_ovf_env.return_value = ("myfile", "mycontent")
 
     def test_find_already_mounted(self):
         """Check we call get_ovf_env from on matching mounted devices"""
         mounts = {
-            '/dev/sr9': {
-                'fstype': 'iso9660',
-                'mountpoint': 'wark/media/sr9',
-                'opts': 'ro',
+            "/dev/sr9": {
+                "fstype": "iso9660",
+                "mountpoint": "wark/media/sr9",
+                "opts": "ro",
             }
         }
         self.m_mounts.return_value = mounts
@@ -875,33 +1046,34 @@ class TestTransportIso9660(CiTestCase):
     def test_find_already_mounted_skips_non_iso9660(self):
         """Check we call get_ovf_env ignoring non iso9660"""
         mounts = {
-            '/dev/xvdb': {
-                'fstype': 'vfat',
-                'mountpoint': 'wark/foobar',
-                'opts': 'defaults,noatime',
+            "/dev/xvdb": {
+                "fstype": "vfat",
+                "mountpoint": "wark/foobar",
+                "opts": "defaults,noatime",
+            },
+            "/dev/xvdc": {
+                "fstype": "iso9660",
+                "mountpoint": "wark/media/sr9",
+                "opts": "ro",
             },
-            '/dev/xvdc': {
-                'fstype': 'iso9660',
-                'mountpoint': 'wark/media/sr9',
-                'opts': 'ro',
-            }
         }
         # We use an OrderedDict here to ensure we check xvdb before xvdc
         # as we're not mocking the regex matching, however, if we place
         # an entry in the results then we can be reasonably sure that
         # we're skipping an entry which fails to match.
-        self.m_mounts.return_value = (
-            OrderedDict(sorted(mounts.items(), key=lambda t: t[0])))
+        self.m_mounts.return_value = OrderedDict(
+            sorted(mounts.items(), key=lambda t: t[0])
+        )
 
         self.assertEqual("mycontent", dsovf.transport_iso9660())
 
     def test_find_already_mounted_matches_kname(self):
         """Check we dont regex match on basename of the device"""
         mounts = {
-            '/dev/foo/bar/xvdc': {
-                'fstype': 'iso9660',
-                'mountpoint': 'wark/media/sr9',
-                'opts': 'ro',
+            "/dev/foo/bar/xvdc": {
+                "fstype": "iso9660",
+                "mountpoint": "wark/media/sr9",
+                "opts": "ro",
             }
         }
         # we're skipping an entry which fails to match.
@@ -912,28 +1084,33 @@ class TestTransportIso9660(CiTestCase):
     def test_mount_cb_called_on_blkdevs_with_iso9660(self):
         """Check we call mount_cb on blockdevs with iso9660 only"""
         self.m_mounts.return_value = {}
-        self.m_find_devs_with.return_value = ['/dev/sr0']
+        self.m_find_devs_with.return_value = ["/dev/sr0"]
         self.m_mount_cb.return_value = ("myfile", "mycontent")
 
         self.assertEqual("mycontent", dsovf.transport_iso9660())
         self.m_mount_cb.assert_called_with(
-            "/dev/sr0", dsovf.get_ovf_env, mtype="iso9660")
+            "/dev/sr0", dsovf.get_ovf_env, mtype="iso9660"
+        )
 
     def test_mount_cb_called_on_blkdevs_with_iso9660_check_regex(self):
         """Check we call mount_cb on blockdevs with iso9660 and match regex"""
         self.m_mounts.return_value = {}
         self.m_find_devs_with.return_value = [
-            '/dev/abc', '/dev/my-cdrom', '/dev/sr0']
+            "/dev/abc",
+            "/dev/my-cdrom",
+            "/dev/sr0",
+        ]
         self.m_mount_cb.return_value = ("myfile", "mycontent")
 
         self.assertEqual("mycontent", dsovf.transport_iso9660())
         self.m_mount_cb.assert_called_with(
-            "/dev/sr0", dsovf.get_ovf_env, mtype="iso9660")
+            "/dev/sr0", dsovf.get_ovf_env, mtype="iso9660"
+        )
 
     def test_mount_cb_not_called_no_matches(self):
         """Check we don't call mount_cb if nothing matches"""
         self.m_mounts.return_value = {}
-        self.m_find_devs_with.return_value = ['/dev/vg/myovf']
+        self.m_find_devs_with.return_value = ["/dev/vg/myovf"]
 
         self.assertEqual(NOT_FOUND, dsovf.transport_iso9660())
         self.assertEqual(0, self.m_mount_cb.call_count)
@@ -941,76 +1118,85 @@ class TestTransportIso9660(CiTestCase):
     def test_mount_cb_called_require_iso_false(self):
         """Check we call mount_cb on blockdevs with require_iso=False"""
         self.m_mounts.return_value = {}
-        self.m_find_devs_with.return_value = ['/dev/xvdz']
+        self.m_find_devs_with.return_value = ["/dev/xvdz"]
         self.m_mount_cb.return_value = ("myfile", "mycontent")
 
         self.assertEqual(
-            "mycontent", dsovf.transport_iso9660(require_iso=False))
+            "mycontent", dsovf.transport_iso9660(require_iso=False)
+        )
 
         self.m_mount_cb.assert_called_with(
-            "/dev/xvdz", dsovf.get_ovf_env, mtype=None)
+            "/dev/xvdz", dsovf.get_ovf_env, mtype=None
+        )
 
     def test_maybe_cdrom_device_none(self):
         """Test maybe_cdrom_device returns False for none/empty input"""
         self.assertFalse(dsovf.maybe_cdrom_device(None))
-        self.assertFalse(dsovf.maybe_cdrom_device(''))
+        self.assertFalse(dsovf.maybe_cdrom_device(""))
 
     def test_maybe_cdrom_device_non_string_exception(self):
         """Test maybe_cdrom_device raises ValueError on non-string types"""
         with self.assertRaises(ValueError):
-            dsovf.maybe_cdrom_device({'a': 'eleven'})
+            dsovf.maybe_cdrom_device({"a": "eleven"})
 
     def test_maybe_cdrom_device_false_on_multi_dir_paths(self):
         """Test maybe_cdrom_device is false on /dev[/.*]/* paths"""
-        self.assertFalse(dsovf.maybe_cdrom_device('/dev/foo/sr0'))
-        self.assertFalse(dsovf.maybe_cdrom_device('foo/sr0'))
-        self.assertFalse(dsovf.maybe_cdrom_device('../foo/sr0'))
-        self.assertFalse(dsovf.maybe_cdrom_device('../foo/sr0'))
+        self.assertFalse(dsovf.maybe_cdrom_device("/dev/foo/sr0"))
+        self.assertFalse(dsovf.maybe_cdrom_device("foo/sr0"))
+        self.assertFalse(dsovf.maybe_cdrom_device("../foo/sr0"))
+        self.assertFalse(dsovf.maybe_cdrom_device("../foo/sr0"))
 
     def test_maybe_cdrom_device_true_on_hd_partitions(self):
         """Test maybe_cdrom_device is false on /dev/hd[a-z][0-9]+ paths"""
-        self.assertTrue(dsovf.maybe_cdrom_device('/dev/hda1'))
-        self.assertTrue(dsovf.maybe_cdrom_device('hdz9'))
+        self.assertTrue(dsovf.maybe_cdrom_device("/dev/hda1"))
+        self.assertTrue(dsovf.maybe_cdrom_device("hdz9"))
 
     def test_maybe_cdrom_device_true_on_valid_relative_paths(self):
         """Test maybe_cdrom_device normalizes paths"""
-        self.assertTrue(dsovf.maybe_cdrom_device('/dev/wark/../sr9'))
-        self.assertTrue(dsovf.maybe_cdrom_device('///sr0'))
-        self.assertTrue(dsovf.maybe_cdrom_device('/sr0'))
-        self.assertTrue(dsovf.maybe_cdrom_device('//dev//hda'))
+        self.assertTrue(dsovf.maybe_cdrom_device("/dev/wark/../sr9"))
+        self.assertTrue(dsovf.maybe_cdrom_device("///sr0"))
+        self.assertTrue(dsovf.maybe_cdrom_device("/sr0"))
+        self.assertTrue(dsovf.maybe_cdrom_device("//dev//hda"))
 
     def test_maybe_cdrom_device_true_on_xvd_partitions(self):
         """Test maybe_cdrom_device returns true on xvd*"""
-        self.assertTrue(dsovf.maybe_cdrom_device('/dev/xvda'))
-        self.assertTrue(dsovf.maybe_cdrom_device('/dev/xvda1'))
-        self.assertTrue(dsovf.maybe_cdrom_device('xvdza1'))
+        self.assertTrue(dsovf.maybe_cdrom_device("/dev/xvda"))
+        self.assertTrue(dsovf.maybe_cdrom_device("/dev/xvda1"))
+        self.assertTrue(dsovf.maybe_cdrom_device("xvdza1"))
 
 
 @mock.patch(MPATH + "subp.which")
 @mock.patch(MPATH + "subp.subp")
 class TestTransportVmwareGuestinfo(CiTestCase):
     """Test the com.vmware.guestInfo transport implemented in
-       transport_vmware_guestinfo."""
+    transport_vmware_guestinfo."""
 
-    rpctool = 'vmware-rpctool'
+    rpctool = "vmware-rpctool"
     with_logs = True
-    rpctool_path = '/not/important/vmware-rpctool'
+    rpctool_path = "/not/important/vmware-rpctool"
 
     def test_without_vmware_rpctool_returns_notfound(self, m_subp, m_which):
         m_which.return_value = None
         self.assertEqual(NOT_FOUND, dsovf.transport_vmware_guestinfo())
-        self.assertEqual(0, m_subp.call_count,
-                         "subp should not be called if no rpctool in path.")
+        self.assertEqual(
+            0,
+            m_subp.call_count,
+            "subp should not be called if no rpctool in path.",
+        )
 
     def test_notfound_on_exit_code_1(self, m_subp, m_which):
         """If vmware-rpctool exits 1, then must return not found."""
         m_which.return_value = self.rpctool_path
         m_subp.side_effect = subp.ProcessExecutionError(
-            stdout="", stderr="No value found", exit_code=1, cmd=["unused"])
+            stdout="", stderr="No value found", exit_code=1, cmd=["unused"]
+        )
         self.assertEqual(NOT_FOUND, dsovf.transport_vmware_guestinfo())
         self.assertEqual(1, m_subp.call_count)
-        self.assertNotIn("WARNING", self.logs.getvalue(),
-                         "exit code of 1 by rpctool should not cause warning.")
+        self.assertNotIn(
+            "WARNING",
+            self.logs.getvalue(),
+            "exit code of 1 by rpctool should not cause warning.",
+        )
 
     def test_notfound_if_no_content_but_exit_zero(self, m_subp, m_which):
         """If vmware-rpctool exited 0 with no stdout is normal not-found.
@@ -1020,7 +1206,7 @@ class TestTransportVmwareGuestinfo(CiTestCase):
         the case where it exited 0 and just wrote nothing to stdout.
         """
         m_which.return_value = self.rpctool_path
-        m_subp.return_value = ('', '')
+        m_subp.return_value = ("", "")
         self.assertEqual(NOT_FOUND, dsovf.transport_vmware_guestinfo())
         self.assertEqual(1, m_subp.call_count)
 
@@ -1028,19 +1214,24 @@ class TestTransportVmwareGuestinfo(CiTestCase):
         """If vmware-rpctool exits non zero or 1, warnings should be logged."""
         m_which.return_value = self.rpctool_path
         m_subp.side_effect = subp.ProcessExecutionError(
-            stdout=None, stderr="No value found", exit_code=2, cmd=["unused"])
+            stdout=None, stderr="No value found", exit_code=2, cmd=["unused"]
+        )
         self.assertEqual(NOT_FOUND, dsovf.transport_vmware_guestinfo())
         self.assertEqual(1, m_subp.call_count)
-        self.assertIn("WARNING", self.logs.getvalue(),
-                      "exit code of 2 by rpctool should log WARNING.")
+        self.assertIn(
+            "WARNING",
+            self.logs.getvalue(),
+            "exit code of 2 by rpctool should log WARNING.",
+        )
 
     def test_found_when_guestinfo_present(self, m_subp, m_which):
         """When there is a ovf info, transport should return it."""
         m_which.return_value = self.rpctool_path
         content = fill_properties({})
-        m_subp.return_value = (content, '')
+        m_subp.return_value = (content, "")
         self.assertEqual(content, dsovf.transport_vmware_guestinfo())
         self.assertEqual(1, m_subp.call_count)
 
+
 #
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_rbx.py b/tests/unittests/sources/test_rbx.py
index c1294c92..475bf498 100644
--- a/tests/unittests/sources/test_rbx.py
+++ b/tests/unittests/sources/test_rbx.py
@@ -1,38 +1,42 @@
 import json
 
-from cloudinit import helpers
-from cloudinit import distros
+from cloudinit import distros, helpers, subp
 from cloudinit.sources import DataSourceRbxCloud as ds
-from tests.unittests.helpers import mock, CiTestCase, populate_dir
-from cloudinit import subp
+from tests.unittests.helpers import CiTestCase, mock, populate_dir
 
 DS_PATH = "cloudinit.sources.DataSourceRbxCloud"
 
-CRYPTO_PASS = "$6$uktth46t$FvpDzFD2iL9YNZIG1Epz7957hJqbH0f" \
-              "QKhnzcfBcUhEodGAWRqTy7tYG4nEW7SUOYBjxOSFIQW5" \
-              "tToyGP41.s1"
+CRYPTO_PASS = (
+    "$6$uktth46t$FvpDzFD2iL9YNZIG1Epz7957hJqbH0f"
+    "QKhnzcfBcUhEodGAWRqTy7tYG4nEW7SUOYBjxOSFIQW5"
+    "tToyGP41.s1"
+)
 
 CLOUD_METADATA = {
     "vm": {
         "memory": 4,
         "cpu": 2,
         "name": "vm-image-builder",
-        "_id": "5beab44f680cffd11f0e60fc"
+        "_id": "5beab44f680cffd11f0e60fc",
     },
     "additionalMetadata": {
         "username": "guru",
         "sshKeys": ["ssh-rsa ..."],
-        "password": {
-            "sha512": CRYPTO_PASS
-        }
+        "password": {"sha512": CRYPTO_PASS},
     },
     "disk": [
-        {"size": 10, "type": "ssd",
-         "name": "vm-image-builder-os",
-         "_id": "5beab450680cffd11f0e60fe"},
-        {"size": 2, "type": "ssd",
-         "name": "ubuntu-1804-bionic",
-         "_id": "5bef002c680cffd11f107590"}
+        {
+            "size": 10,
+            "type": "ssd",
+            "name": "vm-image-builder-os",
+            "_id": "5beab450680cffd11f0e60fe",
+        },
+        {
+            "size": 2,
+            "type": "ssd",
+            "name": "ubuntu-1804-bionic",
+            "_id": "5bef002c680cffd11f107590",
+        },
     ],
     "netadp": [
         {
@@ -44,12 +48,12 @@ CLOUD_METADATA = {
                 "netmask": "255.255.248.0",
                 "name": "public",
                 "type": "public",
-                "_id": "5784e97be2627505227b578c"
+                "_id": "5784e97be2627505227b578c",
             },
             "speed": 1000,
             "type": "hv",
             "macaddress": "00:15:5D:FF:0F:03",
-            "_id": "5beab450680cffd11f0e6102"
+            "_id": "5beab450680cffd11f0e6102",
         },
         {
             "ip": [{"address": "10.209.78.11"}],
@@ -60,21 +64,21 @@ CLOUD_METADATA = {
                 "netmask": "255.255.255.0",
                 "name": "network-determined-bardeen",
                 "type": "private",
-                "_id": "5beaec64680cffd11f0e7c31"
+                "_id": "5beaec64680cffd11f0e7c31",
             },
             "speed": 1000,
             "type": "hv",
             "macaddress": "00:15:5D:FF:0F:24",
-            "_id": "5bec18c6680cffd11f0f0d8b"
-        }
+            "_id": "5bec18c6680cffd11f0f0d8b",
+        },
     ],
-    "dvddrive": [{"iso": {}}]
+    "dvddrive": [{"iso": {}}],
 }
 
 
 class TestRbxDataSource(CiTestCase):
     parsed_user = None
-    allowed_subp = ['bash']
+    allowed_subp = ["bash"]
 
     def _fetch_distro(self, kind):
         cls = distros.fetch(kind)
@@ -85,30 +89,30 @@ class TestRbxDataSource(CiTestCase):
         super(TestRbxDataSource, self).setUp()
         self.tmp = self.tmp_dir()
         self.paths = helpers.Paths(
-            {'cloud_dir': self.tmp, 'run_dir': self.tmp}
+            {"cloud_dir": self.tmp, "run_dir": self.tmp}
         )
 
         # defaults for few tests
         self.ds = ds.DataSourceRbxCloud
         self.seed_dir = self.paths.seed_dir
-        self.sys_cfg = {'datasource': {'RbxCloud': {'dsmode': 'local'}}}
+        self.sys_cfg = {"datasource": {"RbxCloud": {"dsmode": "local"}}}
 
     def test_seed_read_user_data_callback_empty_file(self):
-        populate_user_metadata(self.seed_dir, '')
+        populate_user_metadata(self.seed_dir, "")
         populate_cloud_metadata(self.seed_dir, {})
         results = ds.read_user_data_callback(self.seed_dir)
 
         self.assertIsNone(results)
 
     def test_seed_read_user_data_callback_valid_disk(self):
-        populate_user_metadata(self.seed_dir, '')
+        populate_user_metadata(self.seed_dir, "")
         populate_cloud_metadata(self.seed_dir, CLOUD_METADATA)
         results = ds.read_user_data_callback(self.seed_dir)
 
         self.assertNotEqual(results, None)
-        self.assertTrue('userdata' in results)
-        self.assertTrue('metadata' in results)
-        self.assertTrue('cfg' in results)
+        self.assertTrue("userdata" in results)
+        self.assertTrue("metadata" in results)
+        self.assertTrue("cfg" in results)
 
     def test_seed_read_user_data_callback_userdata(self):
         userdata = "#!/bin/sh\nexit 1"
@@ -118,121 +122,120 @@ class TestRbxDataSource(CiTestCase):
         results = ds.read_user_data_callback(self.seed_dir)
 
         self.assertNotEqual(results, None)
-        self.assertTrue('userdata' in results)
-        self.assertEqual(results['userdata'], userdata)
+        self.assertTrue("userdata" in results)
+        self.assertEqual(results["userdata"], userdata)
 
     def test_generate_network_config(self):
         expected = {
-            'version': 1,
-            'config': [
+            "version": 1,
+            "config": [
                 {
-                    'subnets': [
-                        {'control': 'auto',
-                         'dns_nameservers': ['8.8.8.8', '8.8.4.4'],
-                         'netmask': '255.255.248.0',
-                         'address': '62.181.8.174',
-                         'type': 'static', 'gateway': '62.181.8.1'}
+                    "subnets": [
+                        {
+                            "control": "auto",
+                            "dns_nameservers": ["8.8.8.8", "8.8.4.4"],
+                            "netmask": "255.255.248.0",
+                            "address": "62.181.8.174",
+                            "type": "static",
+                            "gateway": "62.181.8.1",
+                        }
                     ],
-                    'type': 'physical',
-                    'name': 'eth0',
-                    'mac_address': '00:15:5d:ff:0f:03'
+                    "type": "physical",
+                    "name": "eth0",
+                    "mac_address": "00:15:5d:ff:0f:03",
                 },
                 {
-                    'subnets': [
-                        {'control': 'auto',
-                         'dns_nameservers': ['9.9.9.9', '8.8.8.8'],
-                         'netmask': '255.255.255.0',
-                         'address': '10.209.78.11',
-                         'type': 'static',
-                         'gateway': '10.209.78.1'}
+                    "subnets": [
+                        {
+                            "control": "auto",
+                            "dns_nameservers": ["9.9.9.9", "8.8.8.8"],
+                            "netmask": "255.255.255.0",
+                            "address": "10.209.78.11",
+                            "type": "static",
+                            "gateway": "10.209.78.1",
+                        }
                     ],
-                    'type': 'physical',
-                    'name': 'eth1',
-                    'mac_address': '00:15:5d:ff:0f:24'
-                }
-            ]
+                    "type": "physical",
+                    "name": "eth1",
+                    "mac_address": "00:15:5d:ff:0f:24",
+                },
+            ],
         }
         self.assertTrue(
-            ds.generate_network_config(CLOUD_METADATA['netadp']),
-            expected
+            ds.generate_network_config(CLOUD_METADATA["netadp"]), expected
         )
 
-    @mock.patch(DS_PATH + '.subp.subp')
+    @mock.patch(DS_PATH + ".subp.subp")
     def test_gratuitous_arp_run_standard_arping(self, m_subp):
         """Test handle run arping & parameters."""
         items = [
+            {"destination": "172.17.0.2", "source": "172.16.6.104"},
             {
-                'destination': '172.17.0.2',
-                'source': '172.16.6.104'
-            },
-            {
-                'destination': '172.17.0.2',
-                'source': '172.16.6.104',
+                "destination": "172.17.0.2",
+                "source": "172.16.6.104",
             },
         ]
-        ds.gratuitous_arp(items, self._fetch_distro('ubuntu'))
-        self.assertEqual([
-            mock.call([
-                'arping', '-c', '2', '-S',
-                '172.16.6.104', '172.17.0.2'
-            ]),
-            mock.call([
-                'arping', '-c', '2', '-S',
-                '172.16.6.104', '172.17.0.2'
-            ])
-        ], m_subp.call_args_list
+        ds.gratuitous_arp(items, self._fetch_distro("ubuntu"))
+        self.assertEqual(
+            [
+                mock.call(
+                    ["arping", "-c", "2", "-S", "172.16.6.104", "172.17.0.2"]
+                ),
+                mock.call(
+                    ["arping", "-c", "2", "-S", "172.16.6.104", "172.17.0.2"]
+                ),
+            ],
+            m_subp.call_args_list,
         )
 
-    @mock.patch(DS_PATH + '.subp.subp')
+    @mock.patch(DS_PATH + ".subp.subp")
     def test_handle_rhel_like_arping(self, m_subp):
         """Test handle on RHEL-like distros."""
         items = [
             {
-                'source': '172.16.6.104',
-                'destination': '172.17.0.2',
+                "source": "172.16.6.104",
+                "destination": "172.17.0.2",
             }
         ]
-        ds.gratuitous_arp(items, self._fetch_distro('fedora'))
-        self.assertEqual([
-            mock.call(
-                ['arping', '-c', '2', '-s', '172.16.6.104', '172.17.0.2']
-            )],
-            m_subp.call_args_list
+        ds.gratuitous_arp(items, self._fetch_distro("fedora"))
+        self.assertEqual(
+            [
+                mock.call(
+                    ["arping", "-c", "2", "-s", "172.16.6.104", "172.17.0.2"]
+                )
+            ],
+            m_subp.call_args_list,
         )
 
     @mock.patch(
-        DS_PATH + '.subp.subp',
-        side_effect=subp.ProcessExecutionError()
+        DS_PATH + ".subp.subp", side_effect=subp.ProcessExecutionError()
     )
     def test_continue_on_arping_error(self, m_subp):
         """Continue when command error"""
         items = [
+            {"destination": "172.17.0.2", "source": "172.16.6.104"},
             {
-                'destination': '172.17.0.2',
-                'source': '172.16.6.104'
-            },
-            {
-                'destination': '172.17.0.2',
-                'source': '172.16.6.104',
+                "destination": "172.17.0.2",
+                "source": "172.16.6.104",
             },
         ]
-        ds.gratuitous_arp(items, self._fetch_distro('ubuntu'))
-        self.assertEqual([
-            mock.call([
-                'arping', '-c', '2', '-S',
-                '172.16.6.104', '172.17.0.2'
-            ]),
-            mock.call([
-                'arping', '-c', '2', '-S',
-                '172.16.6.104', '172.17.0.2'
-            ])
-        ], m_subp.call_args_list
+        ds.gratuitous_arp(items, self._fetch_distro("ubuntu"))
+        self.assertEqual(
+            [
+                mock.call(
+                    ["arping", "-c", "2", "-S", "172.16.6.104", "172.17.0.2"]
+                ),
+                mock.call(
+                    ["arping", "-c", "2", "-S", "172.16.6.104", "172.17.0.2"]
+                ),
+            ],
+            m_subp.call_args_list,
         )
 
 
 def populate_cloud_metadata(path, data):
-    populate_dir(path, {'cloud.json': json.dumps(data)})
+    populate_dir(path, {"cloud.json": json.dumps(data)})
 
 
 def populate_user_metadata(path, data):
-    populate_dir(path, {'user.data': data})
+    populate_dir(path, {"user.data": data})
diff --git a/tests/unittests/sources/test_scaleway.py b/tests/unittests/sources/test_scaleway.py
index 33ae26b8..d7e8b969 100644
--- a/tests/unittests/sources/test_scaleway.py
+++ b/tests/unittests/sources/test_scaleway.py
@@ -5,12 +5,9 @@ import json
 import httpretty
 import requests
 
-from cloudinit import helpers
-from cloudinit import settings
-from cloudinit import sources
+from cloudinit import helpers, settings, sources
 from cloudinit.sources import DataSourceScaleway
-
-from tests.unittests.helpers import mock, HttprettyTestCase, CiTestCase
+from tests.unittests.helpers import CiTestCase, HttprettyTestCase, mock
 
 
 class DataResponses(object):
@@ -24,11 +21,11 @@ class DataResponses(object):
 
     @staticmethod
     def rate_limited(method, uri, headers):
-        return 429, headers, ''
+        return 429, headers, ""
 
     @staticmethod
     def api_error(method, uri, headers):
-        return 500, headers, ''
+        return 500, headers, ""
 
     @classmethod
     def get_ok(cls, method, uri, headers):
@@ -39,7 +36,7 @@ class DataResponses(object):
         """
         No user data for this server.
         """
-        return 404, headers, ''
+        return 404, headers, ""
 
 
 class MetadataResponses(object):
@@ -48,18 +45,21 @@ class MetadataResponses(object):
     """
 
     FAKE_METADATA = {
-        'id': '00000000-0000-0000-0000-000000000000',
-        'hostname': 'scaleway.host',
-        'tags': [
+        "id": "00000000-0000-0000-0000-000000000000",
+        "hostname": "scaleway.host",
+        "tags": [
             "AUTHORIZED_KEY=ssh-rsa_AAAAB3NzaC1yc2EAAAADAQABDDDDD",
         ],
-        'ssh_public_keys': [{
-            'key': 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA',
-            'fingerprint': '2048 06:ae:...  login (RSA)'
-        }, {
-            'key': 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC',
-            'fingerprint': '2048 06:ff:...  login2 (RSA)'
-        }]
+        "ssh_public_keys": [
+            {
+                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA",
+                "fingerprint": "2048 06:ae:...  login (RSA)",
+            },
+            {
+                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC",
+                "fingerprint": "2048 06:ff:...  login2 (RSA)",
+            },
+        ],
     }
 
     @classmethod
@@ -68,46 +68,49 @@ class MetadataResponses(object):
 
 
 class TestOnScaleway(CiTestCase):
-
     def setUp(self):
         super(TestOnScaleway, self).setUp()
         self.tmp = self.tmp_dir()
 
     def install_mocks(self, fake_dmi, fake_file_exists, fake_cmdline):
         mock, faked = fake_dmi
-        mock.return_value = 'Scaleway' if faked else 'Whatever'
+        mock.return_value = "Scaleway" if faked else "Whatever"
 
         mock, faked = fake_file_exists
         mock.return_value = faked
 
         mock, faked = fake_cmdline
-        mock.return_value = \
-            'initrd=initrd showopts scaleway nousb' if faked \
-            else 'BOOT_IMAGE=/vmlinuz-3.11.0-26-generic'
-
-    @mock.patch('cloudinit.util.get_cmdline')
-    @mock.patch('os.path.exists')
-    @mock.patch('cloudinit.dmi.read_dmi_data')
-    def test_not_on_scaleway(self, m_read_dmi_data, m_file_exists,
-                             m_get_cmdline):
+        mock.return_value = (
+            "initrd=initrd showopts scaleway nousb"
+            if faked
+            else "BOOT_IMAGE=/vmlinuz-3.11.0-26-generic"
+        )
+
+    @mock.patch("cloudinit.util.get_cmdline")
+    @mock.patch("os.path.exists")
+    @mock.patch("cloudinit.dmi.read_dmi_data")
+    def test_not_on_scaleway(
+        self, m_read_dmi_data, m_file_exists, m_get_cmdline
+    ):
         self.install_mocks(
             fake_dmi=(m_read_dmi_data, False),
             fake_file_exists=(m_file_exists, False),
-            fake_cmdline=(m_get_cmdline, False)
+            fake_cmdline=(m_get_cmdline, False),
         )
         self.assertFalse(DataSourceScaleway.on_scaleway())
 
         # When not on Scaleway, get_data() returns False.
         datasource = DataSourceScaleway.DataSourceScaleway(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp})
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
         )
         self.assertFalse(datasource.get_data())
 
-    @mock.patch('cloudinit.util.get_cmdline')
-    @mock.patch('os.path.exists')
-    @mock.patch('cloudinit.dmi.read_dmi_data')
-    def test_on_scaleway_dmi(self, m_read_dmi_data, m_file_exists,
-                             m_get_cmdline):
+    @mock.patch("cloudinit.util.get_cmdline")
+    @mock.patch("os.path.exists")
+    @mock.patch("cloudinit.dmi.read_dmi_data")
+    def test_on_scaleway_dmi(
+        self, m_read_dmi_data, m_file_exists, m_get_cmdline
+    ):
         """
         dmidecode returns "Scaleway".
         """
@@ -115,37 +118,39 @@ class TestOnScaleway(CiTestCase):
         self.install_mocks(
             fake_dmi=(m_read_dmi_data, True),
             fake_file_exists=(m_file_exists, False),
-            fake_cmdline=(m_get_cmdline, False)
+            fake_cmdline=(m_get_cmdline, False),
         )
         self.assertTrue(DataSourceScaleway.on_scaleway())
 
-    @mock.patch('cloudinit.util.get_cmdline')
-    @mock.patch('os.path.exists')
-    @mock.patch('cloudinit.dmi.read_dmi_data')
-    def test_on_scaleway_var_run_scaleway(self, m_read_dmi_data, m_file_exists,
-                                          m_get_cmdline):
+    @mock.patch("cloudinit.util.get_cmdline")
+    @mock.patch("os.path.exists")
+    @mock.patch("cloudinit.dmi.read_dmi_data")
+    def test_on_scaleway_var_run_scaleway(
+        self, m_read_dmi_data, m_file_exists, m_get_cmdline
+    ):
         """
         /var/run/scaleway exists.
         """
         self.install_mocks(
             fake_dmi=(m_read_dmi_data, False),
             fake_file_exists=(m_file_exists, True),
-            fake_cmdline=(m_get_cmdline, False)
+            fake_cmdline=(m_get_cmdline, False),
         )
         self.assertTrue(DataSourceScaleway.on_scaleway())
 
-    @mock.patch('cloudinit.util.get_cmdline')
-    @mock.patch('os.path.exists')
-    @mock.patch('cloudinit.dmi.read_dmi_data')
-    def test_on_scaleway_cmdline(self, m_read_dmi_data, m_file_exists,
-                                 m_get_cmdline):
+    @mock.patch("cloudinit.util.get_cmdline")
+    @mock.patch("os.path.exists")
+    @mock.patch("cloudinit.dmi.read_dmi_data")
+    def test_on_scaleway_cmdline(
+        self, m_read_dmi_data, m_file_exists, m_get_cmdline
+    ):
         """
         "scaleway" in /proc/cmdline.
         """
         self.install_mocks(
             fake_dmi=(m_read_dmi_data, False),
             fake_file_exists=(m_file_exists, False),
-            fake_cmdline=(m_get_cmdline, True)
+            fake_cmdline=(m_get_cmdline, True),
         )
         self.assertTrue(DataSourceScaleway.on_scaleway())
 
@@ -160,65 +165,86 @@ def get_source_address_adapter(*args, **kwargs):
     This function removes the bind on a privileged address, since anyway the
     HTTP call is mocked by httpretty.
     """
-    kwargs.pop('source_address')
+    kwargs.pop("source_address")
     return requests.adapters.HTTPAdapter(*args, **kwargs)
 
 
 class TestDataSourceScaleway(HttprettyTestCase):
-
     def setUp(self):
         tmp = self.tmp_dir()
         self.datasource = DataSourceScaleway.DataSourceScaleway(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': tmp})
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": tmp})
         )
         super(TestDataSourceScaleway, self).setUp()
 
-        self.metadata_url = \
-            DataSourceScaleway.BUILTIN_DS_CONFIG['metadata_url']
-        self.userdata_url = \
-            DataSourceScaleway.BUILTIN_DS_CONFIG['userdata_url']
-        self.vendordata_url = \
-            DataSourceScaleway.BUILTIN_DS_CONFIG['vendordata_url']
+        self.metadata_url = DataSourceScaleway.BUILTIN_DS_CONFIG[
+            "metadata_url"
+        ]
+        self.userdata_url = DataSourceScaleway.BUILTIN_DS_CONFIG[
+            "userdata_url"
+        ]
+        self.vendordata_url = DataSourceScaleway.BUILTIN_DS_CONFIG[
+            "vendordata_url"
+        ]
 
-        self.add_patch('cloudinit.sources.DataSourceScaleway.on_scaleway',
-                       '_m_on_scaleway', return_value=True)
         self.add_patch(
-            'cloudinit.sources.DataSourceScaleway.net.find_fallback_nic',
-            '_m_find_fallback_nic', return_value='scalewaynic0')
-
-    @mock.patch('cloudinit.sources.DataSourceScaleway.EphemeralDHCPv4')
-    @mock.patch('cloudinit.sources.DataSourceScaleway.SourceAddressAdapter',
-                get_source_address_adapter)
-    @mock.patch('cloudinit.util.get_cmdline')
-    @mock.patch('time.sleep', return_value=None)
+            "cloudinit.sources.DataSourceScaleway.on_scaleway",
+            "_m_on_scaleway",
+            return_value=True,
+        )
+        self.add_patch(
+            "cloudinit.sources.DataSourceScaleway.net.find_fallback_nic",
+            "_m_find_fallback_nic",
+            return_value="scalewaynic0",
+        )
+
+    @mock.patch("cloudinit.sources.DataSourceScaleway.EphemeralDHCPv4")
+    @mock.patch(
+        "cloudinit.sources.DataSourceScaleway.SourceAddressAdapter",
+        get_source_address_adapter,
+    )
+    @mock.patch("cloudinit.util.get_cmdline")
+    @mock.patch("time.sleep", return_value=None)
     def test_metadata_ok(self, sleep, m_get_cmdline, dhcpv4):
         """
         get_data() returns metadata, user data and vendor data.
         """
-        m_get_cmdline.return_value = 'scaleway'
+        m_get_cmdline.return_value = "scaleway"
 
         # Make user data API return a valid response
-        httpretty.register_uri(httpretty.GET, self.metadata_url,
-                               body=MetadataResponses.get_ok)
-        httpretty.register_uri(httpretty.GET, self.userdata_url,
-                               body=DataResponses.get_ok)
-        httpretty.register_uri(httpretty.GET, self.vendordata_url,
-                               body=DataResponses.get_ok)
+        httpretty.register_uri(
+            httpretty.GET, self.metadata_url, body=MetadataResponses.get_ok
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.userdata_url, body=DataResponses.get_ok
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.vendordata_url, body=DataResponses.get_ok
+        )
         self.datasource.get_data()
 
-        self.assertEqual(self.datasource.get_instance_id(),
-                         MetadataResponses.FAKE_METADATA['id'])
-        self.assertEqual(self.datasource.get_public_ssh_keys().sort(), [
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC',
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD',
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA',
-        ].sort())
-        self.assertEqual(self.datasource.get_hostname(),
-                         MetadataResponses.FAKE_METADATA['hostname'])
-        self.assertEqual(self.datasource.get_userdata_raw(),
-                         DataResponses.FAKE_USER_DATA)
-        self.assertEqual(self.datasource.get_vendordata_raw(),
-                         DataResponses.FAKE_USER_DATA)
+        self.assertEqual(
+            self.datasource.get_instance_id(),
+            MetadataResponses.FAKE_METADATA["id"],
+        )
+        self.assertEqual(
+            self.datasource.get_public_ssh_keys().sort(),
+            [
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC",
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD",
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA",
+            ].sort(),
+        )
+        self.assertEqual(
+            self.datasource.get_hostname(),
+            MetadataResponses.FAKE_METADATA["hostname"],
+        )
+        self.assertEqual(
+            self.datasource.get_userdata_raw(), DataResponses.FAKE_USER_DATA
+        )
+        self.assertEqual(
+            self.datasource.get_vendordata_raw(), DataResponses.FAKE_USER_DATA
+        )
         self.assertIsNone(self.datasource.availability_zone)
         self.assertIsNone(self.datasource.region)
         self.assertEqual(sleep.call_count, 0)
@@ -228,246 +254,273 @@ class TestDataSourceScaleway(HttprettyTestCase):
         get_public_ssh_keys() should return empty list if no ssh key are
         available
         """
-        self.datasource.metadata['tags'] = []
-        self.datasource.metadata['ssh_public_keys'] = []
+        self.datasource.metadata["tags"] = []
+        self.datasource.metadata["ssh_public_keys"] = []
         self.assertEqual(self.datasource.get_public_ssh_keys(), [])
 
     def test_ssh_keys_only_tags(self):
         """
         get_public_ssh_keys() should return list of keys available in tags
         """
-        self.datasource.metadata['tags'] = [
+        self.datasource.metadata["tags"] = [
             "AUTHORIZED_KEY=ssh-rsa_AAAAB3NzaC1yc2EAAAADAQABDDDDD",
             "AUTHORIZED_KEY=ssh-rsa_AAAAB3NzaC1yc2EAAAADAQABCCCCC",
         ]
-        self.datasource.metadata['ssh_public_keys'] = []
-        self.assertEqual(self.datasource.get_public_ssh_keys().sort(), [
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD',
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC',
-        ].sort())
+        self.datasource.metadata["ssh_public_keys"] = []
+        self.assertEqual(
+            self.datasource.get_public_ssh_keys().sort(),
+            [
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD",
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC",
+            ].sort(),
+        )
 
     def test_ssh_keys_only_conf(self):
         """
         get_public_ssh_keys() should return list of keys available in
         ssh_public_keys field
         """
-        self.datasource.metadata['tags'] = []
-        self.datasource.metadata['ssh_public_keys'] = [{
-            'key': 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA',
-            'fingerprint': '2048 06:ae:...  login (RSA)'
-        }, {
-            'key': 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC',
-            'fingerprint': '2048 06:ff:...  login2 (RSA)'
-        }]
-        self.assertEqual(self.datasource.get_public_ssh_keys().sort(), [
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC',
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD',
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA',
-        ].sort())
+        self.datasource.metadata["tags"] = []
+        self.datasource.metadata["ssh_public_keys"] = [
+            {
+                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA",
+                "fingerprint": "2048 06:ae:...  login (RSA)",
+            },
+            {
+                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC",
+                "fingerprint": "2048 06:ff:...  login2 (RSA)",
+            },
+        ]
+        self.assertEqual(
+            self.datasource.get_public_ssh_keys().sort(),
+            [
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC",
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD",
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA",
+            ].sort(),
+        )
 
     def test_ssh_keys_both(self):
         """
         get_public_ssh_keys() should return a merge of keys available
         in ssh_public_keys and tags
         """
-        self.datasource.metadata['tags'] = [
+        self.datasource.metadata["tags"] = [
             "AUTHORIZED_KEY=ssh-rsa_AAAAB3NzaC1yc2EAAAADAQABDDDDD",
         ]
 
-        self.datasource.metadata['ssh_public_keys'] = [{
-            'key': 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA',
-            'fingerprint': '2048 06:ae:...  login (RSA)'
-        }, {
-            'key': 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC',
-            'fingerprint': '2048 06:ff:...  login2 (RSA)'
-        }]
-        self.assertEqual(self.datasource.get_public_ssh_keys().sort(), [
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC',
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD',
-            'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA',
-        ].sort())
-
-    @mock.patch('cloudinit.sources.DataSourceScaleway.EphemeralDHCPv4')
-    @mock.patch('cloudinit.sources.DataSourceScaleway.SourceAddressAdapter',
-                get_source_address_adapter)
-    @mock.patch('cloudinit.util.get_cmdline')
-    @mock.patch('time.sleep', return_value=None)
+        self.datasource.metadata["ssh_public_keys"] = [
+            {
+                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA",
+                "fingerprint": "2048 06:ae:...  login (RSA)",
+            },
+            {
+                "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC",
+                "fingerprint": "2048 06:ff:...  login2 (RSA)",
+            },
+        ]
+        self.assertEqual(
+            self.datasource.get_public_ssh_keys().sort(),
+            [
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABCCCCC",
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABDDDDD",
+                "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABA",
+            ].sort(),
+        )
+
+    @mock.patch("cloudinit.sources.DataSourceScaleway.EphemeralDHCPv4")
+    @mock.patch(
+        "cloudinit.sources.DataSourceScaleway.SourceAddressAdapter",
+        get_source_address_adapter,
+    )
+    @mock.patch("cloudinit.util.get_cmdline")
+    @mock.patch("time.sleep", return_value=None)
     def test_metadata_404(self, sleep, m_get_cmdline, dhcpv4):
         """
         get_data() returns metadata, but no user data nor vendor data.
         """
-        m_get_cmdline.return_value = 'scaleway'
+        m_get_cmdline.return_value = "scaleway"
 
         # Make user and vendor data APIs return HTTP/404, which means there is
         # no user / vendor data for the server.
-        httpretty.register_uri(httpretty.GET, self.metadata_url,
-                               body=MetadataResponses.get_ok)
-        httpretty.register_uri(httpretty.GET, self.userdata_url,
-                               body=DataResponses.empty)
-        httpretty.register_uri(httpretty.GET, self.vendordata_url,
-                               body=DataResponses.empty)
+        httpretty.register_uri(
+            httpretty.GET, self.metadata_url, body=MetadataResponses.get_ok
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.userdata_url, body=DataResponses.empty
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.vendordata_url, body=DataResponses.empty
+        )
         self.datasource.get_data()
         self.assertIsNone(self.datasource.get_userdata_raw())
         self.assertIsNone(self.datasource.get_vendordata_raw())
         self.assertEqual(sleep.call_count, 0)
 
-    @mock.patch('cloudinit.sources.DataSourceScaleway.EphemeralDHCPv4')
-    @mock.patch('cloudinit.sources.DataSourceScaleway.SourceAddressAdapter',
-                get_source_address_adapter)
-    @mock.patch('cloudinit.util.get_cmdline')
-    @mock.patch('time.sleep', return_value=None)
+    @mock.patch("cloudinit.sources.DataSourceScaleway.EphemeralDHCPv4")
+    @mock.patch(
+        "cloudinit.sources.DataSourceScaleway.SourceAddressAdapter",
+        get_source_address_adapter,
+    )
+    @mock.patch("cloudinit.util.get_cmdline")
+    @mock.patch("time.sleep", return_value=None)
     def test_metadata_rate_limit(self, sleep, m_get_cmdline, dhcpv4):
         """
         get_data() is rate limited two times by the metadata API when fetching
         user data.
         """
-        m_get_cmdline.return_value = 'scaleway'
+        m_get_cmdline.return_value = "scaleway"
 
-        httpretty.register_uri(httpretty.GET, self.metadata_url,
-                               body=MetadataResponses.get_ok)
-        httpretty.register_uri(httpretty.GET, self.vendordata_url,
-                               body=DataResponses.empty)
+        httpretty.register_uri(
+            httpretty.GET, self.metadata_url, body=MetadataResponses.get_ok
+        )
+        httpretty.register_uri(
+            httpretty.GET, self.vendordata_url, body=DataResponses.empty
+        )
 
         httpretty.register_uri(
-            httpretty.GET, self.userdata_url,
+            httpretty.GET,
+            self.userdata_url,
             responses=[
                 httpretty.Response(body=DataResponses.rate_limited),
                 httpretty.Response(body=DataResponses.rate_limited),
                 httpretty.Response(body=DataResponses.get_ok),
-            ]
+            ],
         )
         self.datasource.get_data()
-        self.assertEqual(self.datasource.get_userdata_raw(),
-                         DataResponses.FAKE_USER_DATA)
+        self.assertEqual(
+            self.datasource.get_userdata_raw(), DataResponses.FAKE_USER_DATA
+        )
         self.assertEqual(sleep.call_count, 2)
 
-    @mock.patch('cloudinit.sources.DataSourceScaleway.net.find_fallback_nic')
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.sources.DataSourceScaleway.net.find_fallback_nic")
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_network_config_ok(self, m_get_cmdline, fallback_nic):
         """
         network_config will only generate IPv4 config if no ipv6 data is
         available in the metadata
         """
-        m_get_cmdline.return_value = 'scaleway'
-        fallback_nic.return_value = 'ens2'
-        self.datasource.metadata['ipv6'] = None
+        m_get_cmdline.return_value = "scaleway"
+        fallback_nic.return_value = "ens2"
+        self.datasource.metadata["ipv6"] = None
 
         netcfg = self.datasource.network_config
         resp = {
-            'version': 1,
-            'config': [
+            "version": 1,
+            "config": [
                 {
-                    'type': 'physical',
-                    'name': 'ens2',
-                    'subnets': [{'type': 'dhcp4'}]
+                    "type": "physical",
+                    "name": "ens2",
+                    "subnets": [{"type": "dhcp4"}],
                 }
-            ]
+            ],
         }
         self.assertEqual(netcfg, resp)
 
-    @mock.patch('cloudinit.sources.DataSourceScaleway.net.find_fallback_nic')
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.sources.DataSourceScaleway.net.find_fallback_nic")
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_network_config_ipv6_ok(self, m_get_cmdline, fallback_nic):
         """
         network_config will only generate IPv4/v6 configs if ipv6 data is
         available in the metadata
         """
-        m_get_cmdline.return_value = 'scaleway'
-        fallback_nic.return_value = 'ens2'
-        self.datasource.metadata['ipv6'] = {
-            'address': '2000:abc:4444:9876::42:999',
-            'gateway': '2000:abc:4444:9876::42:000',
-            'netmask': '127',
+        m_get_cmdline.return_value = "scaleway"
+        fallback_nic.return_value = "ens2"
+        self.datasource.metadata["ipv6"] = {
+            "address": "2000:abc:4444:9876::42:999",
+            "gateway": "2000:abc:4444:9876::42:000",
+            "netmask": "127",
         }
 
         netcfg = self.datasource.network_config
         resp = {
-            'version': 1,
-            'config': [
+            "version": 1,
+            "config": [
                 {
-                    'type': 'physical',
-                    'name': 'ens2',
-                    'subnets': [
+                    "type": "physical",
+                    "name": "ens2",
+                    "subnets": [
+                        {"type": "dhcp4"},
                         {
-                            'type': 'dhcp4'
+                            "type": "static",
+                            "address": "2000:abc:4444:9876::42:999",
+                            "gateway": "2000:abc:4444:9876::42:000",
+                            "netmask": "127",
                         },
-                        {
-                            'type': 'static',
-                            'address': '2000:abc:4444:9876::42:999',
-                            'gateway': '2000:abc:4444:9876::42:000',
-                            'netmask': '127',
-                        }
-                    ]
+                    ],
                 }
-            ]
+            ],
         }
         self.assertEqual(netcfg, resp)
 
-    @mock.patch('cloudinit.sources.DataSourceScaleway.net.find_fallback_nic')
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.sources.DataSourceScaleway.net.find_fallback_nic")
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_network_config_existing(self, m_get_cmdline, fallback_nic):
         """
         network_config() should return the same data if a network config
         already exists
         """
-        m_get_cmdline.return_value = 'scaleway'
-        self.datasource._network_config = '0xdeadbeef'
+        m_get_cmdline.return_value = "scaleway"
+        self.datasource._network_config = "0xdeadbeef"
 
         netcfg = self.datasource.network_config
-        self.assertEqual(netcfg, '0xdeadbeef')
+        self.assertEqual(netcfg, "0xdeadbeef")
 
-    @mock.patch('cloudinit.sources.DataSourceScaleway.net.find_fallback_nic')
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.sources.DataSourceScaleway.net.find_fallback_nic")
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_network_config_unset(self, m_get_cmdline, fallback_nic):
         """
         _network_config will be set to sources.UNSET after the first boot.
         Make sure it behave correctly.
         """
-        m_get_cmdline.return_value = 'scaleway'
-        fallback_nic.return_value = 'ens2'
-        self.datasource.metadata['ipv6'] = None
+        m_get_cmdline.return_value = "scaleway"
+        fallback_nic.return_value = "ens2"
+        self.datasource.metadata["ipv6"] = None
         self.datasource._network_config = sources.UNSET
 
         resp = {
-            'version': 1,
-            'config': [
+            "version": 1,
+            "config": [
                 {
-                    'type': 'physical',
-                    'name': 'ens2',
-                    'subnets': [{'type': 'dhcp4'}]
+                    "type": "physical",
+                    "name": "ens2",
+                    "subnets": [{"type": "dhcp4"}],
                 }
-            ]
+            ],
         }
 
         netcfg = self.datasource.network_config
         self.assertEqual(netcfg, resp)
 
-    @mock.patch('cloudinit.sources.DataSourceScaleway.LOG.warning')
-    @mock.patch('cloudinit.sources.DataSourceScaleway.net.find_fallback_nic')
-    @mock.patch('cloudinit.util.get_cmdline')
-    def test_network_config_cached_none(self, m_get_cmdline, fallback_nic,
-                                        logwarning):
+    @mock.patch("cloudinit.sources.DataSourceScaleway.LOG.warning")
+    @mock.patch("cloudinit.sources.DataSourceScaleway.net.find_fallback_nic")
+    @mock.patch("cloudinit.util.get_cmdline")
+    def test_network_config_cached_none(
+        self, m_get_cmdline, fallback_nic, logwarning
+    ):
         """
         network_config() should return config data if cached data is None
         rather than sources.UNSET
         """
-        m_get_cmdline.return_value = 'scaleway'
-        fallback_nic.return_value = 'ens2'
-        self.datasource.metadata['ipv6'] = None
+        m_get_cmdline.return_value = "scaleway"
+        fallback_nic.return_value = "ens2"
+        self.datasource.metadata["ipv6"] = None
         self.datasource._network_config = None
 
         resp = {
-            'version': 1,
-            'config': [
+            "version": 1,
+            "config": [
                 {
-                    'type': 'physical',
-                    'name': 'ens2',
-                    'subnets': [{'type': 'dhcp4'}]
+                    "type": "physical",
+                    "name": "ens2",
+                    "subnets": [{"type": "dhcp4"}],
                 }
-            ]
+            ],
         }
 
         netcfg = self.datasource.network_config
         self.assertEqual(netcfg, resp)
-        logwarning.assert_called_with('Found None as cached _network_config. '
-                                      'Resetting to %s', sources.UNSET)
+        logwarning.assert_called_with(
+            "Found None as cached _network_config. Resetting to %s",
+            sources.UNSET,
+        )
diff --git a/tests/unittests/sources/test_smartos.py b/tests/unittests/sources/test_smartos.py
index e306eded..55239c4e 100644
--- a/tests/unittests/sources/test_smartos.py
+++ b/tests/unittests/sources/test_smartos.py
@@ -5,14 +5,13 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-'''This is a testcase for the SmartOS datasource.
+"""This is a testcase for the SmartOS datasource.
 
 It replicates a serial console and acts like the SmartOS console does in
 order to validate return responses.
 
-'''
+"""
 
-from binascii import crc32
 import json
 import multiprocessing
 import os
@@ -22,32 +21,40 @@ import signal
 import stat
 import unittest
 import uuid
+from binascii import crc32
 
+from cloudinit import helpers as c_helpers
 from cloudinit import serial
+from cloudinit.event import EventScope, EventType
 from cloudinit.sources import DataSourceSmartOS
+from cloudinit.sources.DataSourceSmartOS import SERIAL_DEVICE, SMARTOS_ENV_KVM
 from cloudinit.sources.DataSourceSmartOS import (
     convert_smartos_network_data as convert_net,
-    SMARTOS_ENV_KVM, SERIAL_DEVICE, get_smartos_environ,
-    identify_file)
-from cloudinit.event import EventScope, EventType
-
-from cloudinit import helpers as c_helpers
-from cloudinit.util import (b64e, write_file)
-from cloudinit.subp import (subp, ProcessExecutionError, which)
-
+)
+from cloudinit.sources.DataSourceSmartOS import (
+    get_smartos_environ,
+    identify_file,
+)
+from cloudinit.subp import ProcessExecutionError, subp, which
+from cloudinit.util import b64e, write_file
 from tests.unittests.helpers import (
-    CiTestCase, mock, FilesystemMockingTestCase, skipIf)
-
+    CiTestCase,
+    FilesystemMockingTestCase,
+    mock,
+    skipIf,
+)
 
 try:
     import serial as _pyserial
+
     assert _pyserial  # avoid pyflakes error F401: import unused
     HAS_PYSERIAL = True
 except ImportError:
     HAS_PYSERIAL = False
 
-DSMOS = 'cloudinit.sources.DataSourceSmartOS'
-SDC_NICS = json.loads("""
+DSMOS = "cloudinit.sources.DataSourceSmartOS"
+SDC_NICS = json.loads(
+    """
 [
     {
         "nic_tag": "external",
@@ -87,10 +94,12 @@ SDC_NICS = json.loads("""
         ]
     }
 ]
-""")
+"""
+)
 
 
-SDC_NICS_ALT = json.loads("""
+SDC_NICS_ALT = json.loads(
+    """
 [
     {
         "interface": "net0",
@@ -126,9 +135,11 @@ SDC_NICS_ALT = json.loads("""
         "mtu": 1500
     }
 ]
-""")
+"""
+)
 
-SDC_NICS_DHCP = json.loads("""
+SDC_NICS_DHCP = json.loads(
+    """
 [
     {
         "interface": "net0",
@@ -164,9 +175,11 @@ SDC_NICS_DHCP = json.loads("""
         "mtu": 1500
     }
 ]
-""")
+"""
+)
 
-SDC_NICS_MIP = json.loads("""
+SDC_NICS_MIP = json.loads(
+    """
 [
     {
         "interface": "net0",
@@ -204,9 +217,11 @@ SDC_NICS_MIP = json.loads("""
         "mtu": 1500
     }
 ]
-""")
+"""
+)
 
-SDC_NICS_MIP_IPV6 = json.loads("""
+SDC_NICS_MIP_IPV6 = json.loads(
+    """
 [
     {
         "interface": "net0",
@@ -243,9 +258,11 @@ SDC_NICS_MIP_IPV6 = json.loads("""
         "mtu": 1500
     }
 ]
-""")
+"""
+)
 
-SDC_NICS_IPV4_IPV6 = json.loads("""
+SDC_NICS_IPV4_IPV6 = json.loads(
+    """
 [
     {
         "interface": "net0",
@@ -277,9 +294,11 @@ SDC_NICS_IPV4_IPV6 = json.loads("""
         "mtu": 1500
     }
 ]
-""")
+"""
+)
 
-SDC_NICS_SINGLE_GATEWAY = json.loads("""
+SDC_NICS_SINGLE_GATEWAY = json.loads(
+    """
 [
   {
     "interface":"net0",
@@ -309,32 +328,33 @@ SDC_NICS_SINGLE_GATEWAY = json.loads("""
     "mtu":1500
   }
 ]
-""")
+"""
+)
 
 
 MOCK_RETURNS = {
-    'hostname': 'test-host',
-    'root_authorized_keys': 'ssh-rsa AAAAB3Nz...aC1yc2E= keyname',
-    'disable_iptables_flag': None,
-    'enable_motd_sys_info': None,
-    'test-var1': 'some data',
-    'cloud-init:user-data': '\n'.join(['#!/bin/sh', '/bin/true', '']),
-    'sdc:datacenter_name': 'somewhere2',
-    'sdc:operator-script': '\n'.join(['bin/true', '']),
-    'sdc:uuid': str(uuid.uuid4()),
-    'sdc:vendor-data': '\n'.join(['VENDOR_DATA', '']),
-    'user-data': '\n'.join(['something', '']),
-    'user-script': '\n'.join(['/bin/true', '']),
-    'sdc:nics': json.dumps(SDC_NICS),
+    "hostname": "test-host",
+    "root_authorized_keys": "ssh-rsa AAAAB3Nz...aC1yc2E= keyname",
+    "disable_iptables_flag": None,
+    "enable_motd_sys_info": None,
+    "test-var1": "some data",
+    "cloud-init:user-data": "\n".join(["#!/bin/sh", "/bin/true", ""]),
+    "sdc:datacenter_name": "somewhere2",
+    "sdc:operator-script": "\n".join(["bin/true", ""]),
+    "sdc:uuid": str(uuid.uuid4()),
+    "sdc:vendor-data": "\n".join(["VENDOR_DATA", ""]),
+    "user-data": "\n".join(["something", ""]),
+    "user-script": "\n".join(["/bin/true", ""]),
+    "sdc:nics": json.dumps(SDC_NICS),
 }
 
-DMI_DATA_RETURN = 'smartdc'
+DMI_DATA_RETURN = "smartdc"
 
 # Useful for calculating the length of a frame body.  A SUCCESS body will be
 # followed by more characters or be one character less if SUCCESS with no
 # payload.  See Section 4.3 of https://eng.joyent.com/mdata/protocol.html.
-SUCCESS_LEN = len('0123abcd SUCCESS ')
-NOTFOUND_LEN = len('0123abcd NOTFOUND')
+SUCCESS_LEN = len("0123abcd SUCCESS ")
+NOTFOUND_LEN = len("0123abcd NOTFOUND")
 
 
 class PsuedoJoyentClient(object):
@@ -364,11 +384,11 @@ class PsuedoJoyentClient(object):
         return True
 
     def open_transport(self):
-        assert(not self._is_open)
+        assert not self._is_open
         self._is_open = True
 
     def close_transport(self):
-        assert(self._is_open)
+        assert self._is_open
         self._is_open = False
 
 
@@ -381,21 +401,35 @@ class TestSmartOSDataSource(FilesystemMockingTestCase):
 
         self.add_patch(DSMOS + ".get_smartos_environ", "get_smartos_environ")
         self.add_patch(DSMOS + ".jmc_client_factory", "jmc_cfact")
-        self.legacy_user_d = self.tmp_path('legacy_user_tmp')
+        self.legacy_user_d = self.tmp_path("legacy_user_tmp")
         os.mkdir(self.legacy_user_d)
-        self.add_patch(DSMOS + ".LEGACY_USER_D", "m_legacy_user_d",
-                       autospec=False, new=self.legacy_user_d)
-        self.add_patch(DSMOS + ".identify_file", "m_identify_file",
-                       return_value="text/plain")
+        self.add_patch(
+            DSMOS + ".LEGACY_USER_D",
+            "m_legacy_user_d",
+            autospec=False,
+            new=self.legacy_user_d,
+        )
+        self.add_patch(
+            DSMOS + ".identify_file",
+            "m_identify_file",
+            return_value="text/plain",
+        )
 
-    def _get_ds(self, mockdata=None, mode=DataSourceSmartOS.SMARTOS_ENV_KVM,
-                sys_cfg=None, ds_cfg=None):
+    def _get_ds(
+        self,
+        mockdata=None,
+        mode=DataSourceSmartOS.SMARTOS_ENV_KVM,
+        sys_cfg=None,
+        ds_cfg=None,
+    ):
         self.jmc_cfact.return_value = PsuedoJoyentClient(mockdata)
         self.get_smartos_environ.return_value = mode
 
         tmpd = self.tmp_dir()
-        dirs = {'cloud_dir': self.tmp_path('cloud_dir', tmpd),
-                'run_dir': self.tmp_path('run_dir')}
+        dirs = {
+            "cloud_dir": self.tmp_path("cloud_dir", tmpd),
+            "run_dir": self.tmp_path("run_dir"),
+        }
         for d in dirs.values():
             os.mkdir(d)
         paths = c_helpers.Paths(dirs)
@@ -404,14 +438,15 @@ class TestSmartOSDataSource(FilesystemMockingTestCase):
             sys_cfg = {}
 
         if ds_cfg is not None:
-            sys_cfg['datasource'] = sys_cfg.get('datasource', {})
-            sys_cfg['datasource']['SmartOS'] = ds_cfg
+            sys_cfg["datasource"] = sys_cfg.get("datasource", {})
+            sys_cfg["datasource"]["SmartOS"] = ds_cfg
 
         return DataSourceSmartOS.DataSourceSmartOS(
-            sys_cfg, distro=None, paths=paths)
+            sys_cfg, distro=None, paths=paths
+        )
 
     def test_no_base64(self):
-        ds_cfg = {'no_base64_decode': ['test_var1'], 'all_base': True}
+        ds_cfg = {"no_base64_decode": ["test_var1"], "all_base": True}
         dsrc = self._get_ds(ds_cfg=ds_cfg)
         ret = dsrc.get_data()
         self.assertTrue(ret)
@@ -420,166 +455,180 @@ class TestSmartOSDataSource(FilesystemMockingTestCase):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['sdc:uuid'],
-                         dsrc.metadata['instance-id'])
+        self.assertEqual(
+            MOCK_RETURNS["sdc:uuid"], dsrc.metadata["instance-id"]
+        )
 
     def test_platform_info(self):
         """All platform-related attributes are properly set."""
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
-        self.assertEqual('joyent', dsrc.cloud_name)
-        self.assertEqual('joyent', dsrc.platform_type)
-        self.assertEqual('serial (/dev/ttyS1)', dsrc.subplatform)
+        self.assertEqual("joyent", dsrc.cloud_name)
+        self.assertEqual("joyent", dsrc.platform_type)
+        self.assertEqual("serial (/dev/ttyS1)", dsrc.subplatform)
 
     def test_root_keys(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['root_authorized_keys'],
-                         dsrc.metadata['public-keys'])
+        self.assertEqual(
+            MOCK_RETURNS["root_authorized_keys"], dsrc.metadata["public-keys"]
+        )
 
     def test_hostname_b64(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['hostname'],
-                         dsrc.metadata['local-hostname'])
+        self.assertEqual(
+            MOCK_RETURNS["hostname"], dsrc.metadata["local-hostname"]
+        )
 
     def test_hostname(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['hostname'],
-                         dsrc.metadata['local-hostname'])
+        self.assertEqual(
+            MOCK_RETURNS["hostname"], dsrc.metadata["local-hostname"]
+        )
 
     def test_hostname_if_no_sdc_hostname(self):
         my_returns = MOCK_RETURNS.copy()
-        my_returns['sdc:hostname'] = 'sdc-' + my_returns['hostname']
+        my_returns["sdc:hostname"] = "sdc-" + my_returns["hostname"]
         dsrc = self._get_ds(mockdata=my_returns)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(my_returns['hostname'],
-                         dsrc.metadata['local-hostname'])
+        self.assertEqual(
+            my_returns["hostname"], dsrc.metadata["local-hostname"]
+        )
 
     def test_sdc_hostname_if_no_hostname(self):
         my_returns = MOCK_RETURNS.copy()
-        my_returns['sdc:hostname'] = 'sdc-' + my_returns['hostname']
-        del my_returns['hostname']
+        my_returns["sdc:hostname"] = "sdc-" + my_returns["hostname"]
+        del my_returns["hostname"]
         dsrc = self._get_ds(mockdata=my_returns)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(my_returns['sdc:hostname'],
-                         dsrc.metadata['local-hostname'])
+        self.assertEqual(
+            my_returns["sdc:hostname"], dsrc.metadata["local-hostname"]
+        )
 
     def test_sdc_uuid_if_no_hostname_or_sdc_hostname(self):
         my_returns = MOCK_RETURNS.copy()
-        del my_returns['hostname']
+        del my_returns["hostname"]
         dsrc = self._get_ds(mockdata=my_returns)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(my_returns['sdc:uuid'],
-                         dsrc.metadata['local-hostname'])
+        self.assertEqual(
+            my_returns["sdc:uuid"], dsrc.metadata["local-hostname"]
+        )
 
     def test_userdata(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['user-data'],
-                         dsrc.metadata['legacy-user-data'])
-        self.assertEqual(MOCK_RETURNS['cloud-init:user-data'],
-                         dsrc.userdata_raw)
+        self.assertEqual(
+            MOCK_RETURNS["user-data"], dsrc.metadata["legacy-user-data"]
+        )
+        self.assertEqual(
+            MOCK_RETURNS["cloud-init:user-data"], dsrc.userdata_raw
+        )
 
     def test_sdc_nics(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(json.loads(MOCK_RETURNS['sdc:nics']),
-                         dsrc.metadata['network-data'])
+        self.assertEqual(
+            json.loads(MOCK_RETURNS["sdc:nics"]), dsrc.metadata["network-data"]
+        )
 
     def test_sdc_scripts(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['user-script'],
-                         dsrc.metadata['user-script'])
+        self.assertEqual(
+            MOCK_RETURNS["user-script"], dsrc.metadata["user-script"]
+        )
 
         legacy_script_f = "%s/user-script" % self.legacy_user_d
         print("legacy_script_f=%s" % legacy_script_f)
         self.assertTrue(os.path.exists(legacy_script_f))
         self.assertTrue(os.path.islink(legacy_script_f))
         user_script_perm = oct(os.stat(legacy_script_f)[stat.ST_MODE])[-3:]
-        self.assertEqual(user_script_perm, '700')
+        self.assertEqual(user_script_perm, "700")
 
     def test_scripts_shebanged(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['user-script'],
-                         dsrc.metadata['user-script'])
+        self.assertEqual(
+            MOCK_RETURNS["user-script"], dsrc.metadata["user-script"]
+        )
 
         legacy_script_f = "%s/user-script" % self.legacy_user_d
         self.assertTrue(os.path.exists(legacy_script_f))
         self.assertTrue(os.path.islink(legacy_script_f))
         shebang = None
-        with open(legacy_script_f, 'r') as f:
+        with open(legacy_script_f, "r") as f:
             shebang = f.readlines()[0].strip()
         self.assertEqual(shebang, "#!/bin/bash")
         user_script_perm = oct(os.stat(legacy_script_f)[stat.ST_MODE])[-3:]
-        self.assertEqual(user_script_perm, '700')
+        self.assertEqual(user_script_perm, "700")
 
     def test_scripts_shebang_not_added(self):
         """
-            Test that the SmartOS requirement that plain text scripts
-            are executable. This test makes sure that plain texts scripts
-            with out file magic have it added appropriately by cloud-init.
+        Test that the SmartOS requirement that plain text scripts
+        are executable. This test makes sure that plain texts scripts
+        with out file magic have it added appropriately by cloud-init.
         """
 
         my_returns = MOCK_RETURNS.copy()
-        my_returns['user-script'] = '\n'.join(['#!/usr/bin/perl',
-                                               'print("hi")', ''])
+        my_returns["user-script"] = "\n".join(
+            ["#!/usr/bin/perl", 'print("hi")', ""]
+        )
 
         dsrc = self._get_ds(mockdata=my_returns)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(my_returns['user-script'],
-                         dsrc.metadata['user-script'])
+        self.assertEqual(
+            my_returns["user-script"], dsrc.metadata["user-script"]
+        )
 
         legacy_script_f = "%s/user-script" % self.legacy_user_d
         self.assertTrue(os.path.exists(legacy_script_f))
         self.assertTrue(os.path.islink(legacy_script_f))
         shebang = None
-        with open(legacy_script_f, 'r') as f:
+        with open(legacy_script_f, "r") as f:
             shebang = f.readlines()[0].strip()
         self.assertEqual(shebang, "#!/usr/bin/perl")
 
     def test_userdata_removed(self):
         """
-            User-data in the SmartOS world is supposed to be written to a file
-            each and every boot. This tests to make sure that in the event the
-            legacy user-data is removed, the existing user-data is backed-up
-            and there is no /var/db/user-data left.
+        User-data in the SmartOS world is supposed to be written to a file
+        each and every boot. This tests to make sure that in the event the
+        legacy user-data is removed, the existing user-data is backed-up
+        and there is no /var/db/user-data left.
         """
 
         user_data_f = "%s/mdata-user-data" % self.legacy_user_d
-        with open(user_data_f, 'w') as f:
+        with open(user_data_f, "w") as f:
             f.write("PREVIOUS")
 
         my_returns = MOCK_RETURNS.copy()
-        del my_returns['user-data']
+        del my_returns["user-data"]
 
         dsrc = self._get_ds(mockdata=my_returns)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertFalse(dsrc.metadata.get('legacy-user-data'))
+        self.assertFalse(dsrc.metadata.get("legacy-user-data"))
 
         found_new = False
         for root, _dirs, files in os.walk(self.legacy_user_d):
             for name in files:
                 name_f = os.path.join(root, name)
                 permissions = oct(os.stat(name_f)[stat.ST_MODE])[-3:]
-                if re.match(r'.*\/mdata-user-data$', name_f):
+                if re.match(r".*\/mdata-user-data$", name_f):
                     found_new = True
                     print(name_f)
-                    self.assertEqual(permissions, '400')
+                    self.assertEqual(permissions, "400")
 
         self.assertFalse(found_new)
 
@@ -587,17 +636,18 @@ class TestSmartOSDataSource(FilesystemMockingTestCase):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['sdc:vendor-data'],
-                         dsrc.metadata['vendor-data'])
+        self.assertEqual(
+            MOCK_RETURNS["sdc:vendor-data"], dsrc.metadata["vendor-data"]
+        )
 
     def test_default_vendor_data(self):
         my_returns = MOCK_RETURNS.copy()
-        def_op_script = my_returns['sdc:vendor-data']
-        del my_returns['sdc:vendor-data']
+        def_op_script = my_returns["sdc:vendor-data"]
+        del my_returns["sdc:vendor-data"]
         dsrc = self._get_ds(mockdata=my_returns)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertNotEqual(def_op_script, dsrc.metadata['vendor-data'])
+        self.assertNotEqual(def_op_script, dsrc.metadata["vendor-data"])
 
         # we expect default vendor-data is a boothook
         self.assertTrue(dsrc.vendordata_raw.startswith("#cloud-boothook"))
@@ -606,15 +656,19 @@ class TestSmartOSDataSource(FilesystemMockingTestCase):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['disable_iptables_flag'],
-                         dsrc.metadata['iptables_disable'])
+        self.assertEqual(
+            MOCK_RETURNS["disable_iptables_flag"],
+            dsrc.metadata["iptables_disable"],
+        )
 
     def test_motd_sys_info(self):
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         ret = dsrc.get_data()
         self.assertTrue(ret)
-        self.assertEqual(MOCK_RETURNS['enable_motd_sys_info'],
-                         dsrc.metadata['motd_sys_info'])
+        self.assertEqual(
+            MOCK_RETURNS["enable_motd_sys_info"],
+            dsrc.metadata["motd_sys_info"],
+        )
 
     def test_default_ephemeral(self):
         # Test to make sure that the builtin config has the ephemeral
@@ -625,16 +679,16 @@ class TestSmartOSDataSource(FilesystemMockingTestCase):
         ret = dsrc.get_data()
         self.assertTrue(ret)
 
-        assert 'disk_setup' in cfg
-        assert 'fs_setup' in cfg
-        self.assertIsInstance(cfg['disk_setup'], dict)
-        self.assertIsInstance(cfg['fs_setup'], list)
+        assert "disk_setup" in cfg
+        assert "fs_setup" in cfg
+        self.assertIsInstance(cfg["disk_setup"], dict)
+        self.assertIsInstance(cfg["fs_setup"], list)
 
     def test_override_disk_aliases(self):
         # Test to make sure that the built-in DS is overriden
         builtin = DataSourceSmartOS.BUILTIN_DS_CONFIG
 
-        mydscfg = {'disk_aliases': {'FOO': '/dev/bar'}}
+        mydscfg = {"disk_aliases": {"FOO": "/dev/bar"}}
 
         # expect that these values are in builtin, or this is pointless
         for k in mydscfg:
@@ -644,25 +698,30 @@ class TestSmartOSDataSource(FilesystemMockingTestCase):
         ret = dsrc.get_data()
         self.assertTrue(ret)
 
-        self.assertEqual(mydscfg['disk_aliases']['FOO'],
-                         dsrc.ds_cfg['disk_aliases']['FOO'])
+        self.assertEqual(
+            mydscfg["disk_aliases"]["FOO"], dsrc.ds_cfg["disk_aliases"]["FOO"]
+        )
 
-        self.assertEqual(dsrc.device_name_to_device('FOO'),
-                         mydscfg['disk_aliases']['FOO'])
+        self.assertEqual(
+            dsrc.device_name_to_device("FOO"), mydscfg["disk_aliases"]["FOO"]
+        )
 
     def test_reconfig_network_on_boot(self):
         # Test to ensure that network is configured from metadata on each boot
         dsrc = self._get_ds(mockdata=MOCK_RETURNS)
         self.assertSetEqual(
-            {EventType.BOOT_NEW_INSTANCE,
-             EventType.BOOT,
-             EventType.BOOT_LEGACY},
-            dsrc.default_update_events[EventScope.NETWORK]
+            {
+                EventType.BOOT_NEW_INSTANCE,
+                EventType.BOOT,
+                EventType.BOOT_LEGACY,
+            },
+            dsrc.default_update_events[EventScope.NETWORK],
         )
 
 
 class TestIdentifyFile(CiTestCase):
     """Test the 'identify_file' utility."""
+
     @skipIf(not which("file"), "command 'file' not available.")
     def test_file_happy_path(self):
         """Test file is available and functional on plain text."""
@@ -680,14 +739,16 @@ class TestIdentifyFile(CiTestCase):
         self.assertEqual(None, identify_file(fname))
         self.assertEqual(
             [mock.call(["file", "--brief", "--mime-type", fname])],
-            m_subp.call_args_list)
+            m_subp.call_args_list,
+        )
 
 
 class ShortReader(object):
     """Implements a 'read' interface for bytes provided.
     much like io.BytesIO but the 'endbyte' acts as if EOF.
     When it is reached a short will be returned."""
-    def __init__(self, initial_bytes, endbyte=b'\0'):
+
+    def __init__(self, initial_bytes, endbyte=b"\0"):
         self.data = initial_bytes
         self.index = 0
         self.len = len(self.data)
@@ -700,7 +761,7 @@ class ShortReader(object):
     def read(self, size=-1):
         """Read size bytes but not past a null."""
         if size == 0 or self.index >= self.len:
-            return b''
+            return b""
 
         rsize = size
         if size < 0 or size + self.index > self.len:
@@ -711,7 +772,7 @@ class ShortReader(object):
             rsize = next_null - self.index + 1
         i = self.index
         self.index += rsize
-        ret = self.data[i:i + rsize]
+        ret = self.data[i : i + rsize]
         if len(ret) and ret[-1:] == self.endbyte:
             ret = ret[:-1]
         return ret
@@ -719,32 +780,34 @@ class ShortReader(object):
 
 class TestJoyentMetadataClient(FilesystemMockingTestCase):
 
-    invalid = b'invalid command\n'
-    failure = b'FAILURE\n'
-    v2_ok = b'V2_OK\n'
+    invalid = b"invalid command\n"
+    failure = b"FAILURE\n"
+    v2_ok = b"V2_OK\n"
 
     def setUp(self):
         super(TestJoyentMetadataClient, self).setUp()
 
         self.serial = mock.MagicMock(spec=serial.Serial)
-        self.request_id = 0xabcdef12
-        self.metadata_value = 'value'
+        self.request_id = 0xABCDEF12
+        self.metadata_value = "value"
         self.response_parts = {
-            'command': 'SUCCESS',
-            'crc': 'b5a9ff00',
-            'length': SUCCESS_LEN + len(b64e(self.metadata_value)),
-            'payload': b64e(self.metadata_value),
-            'request_id': '{0:08x}'.format(self.request_id),
+            "command": "SUCCESS",
+            "crc": "b5a9ff00",
+            "length": SUCCESS_LEN + len(b64e(self.metadata_value)),
+            "payload": b64e(self.metadata_value),
+            "request_id": "{0:08x}".format(self.request_id),
         }
 
         def make_response():
-            payloadstr = ''
-            if 'payload' in self.response_parts:
-                payloadstr = ' {0}'.format(self.response_parts['payload'])
-            return ('V2 {length} {crc} {request_id} '
-                    '{command}{payloadstr}\n'.format(
-                        payloadstr=payloadstr,
-                        **self.response_parts).encode('ascii'))
+            payloadstr = ""
+            if "payload" in self.response_parts:
+                payloadstr = " {0}".format(self.response_parts["payload"])
+            return (
+                "V2 {length} {crc} {request_id} "
+                "{command}{payloadstr}\n".format(
+                    payloadstr=payloadstr, **self.response_parts
+                ).encode("ascii")
+            )
 
         self.metasource_data = None
 
@@ -758,41 +821,49 @@ class TestJoyentMetadataClient(FilesystemMockingTestCase):
 
         self.serial.read.side_effect = read_response
         self.patched_funcs.enter_context(
-            mock.patch('cloudinit.sources.DataSourceSmartOS.random.randint',
-                       mock.Mock(return_value=self.request_id)))
+            mock.patch(
+                "cloudinit.sources.DataSourceSmartOS.random.randint",
+                mock.Mock(return_value=self.request_id),
+            )
+        )
 
     def _get_client(self):
         return DataSourceSmartOS.JoyentMetadataClient(
-            fp=self.serial, smartos_type=DataSourceSmartOS.SMARTOS_ENV_KVM)
+            fp=self.serial, smartos_type=DataSourceSmartOS.SMARTOS_ENV_KVM
+        )
 
     def _get_serial_client(self):
         self.serial.timeout = 1
-        return DataSourceSmartOS.JoyentMetadataSerialClient(None,
-                                                            fp=self.serial)
+        return DataSourceSmartOS.JoyentMetadataSerialClient(
+            None, fp=self.serial
+        )
 
     def assertEndsWith(self, haystack, prefix):
-        self.assertTrue(haystack.endswith(prefix),
-                        "{0} does not end with '{1}'".format(
-                            repr(haystack), prefix))
+        self.assertTrue(
+            haystack.endswith(prefix),
+            "{0} does not end with '{1}'".format(repr(haystack), prefix),
+        )
 
     def assertStartsWith(self, haystack, prefix):
-        self.assertTrue(haystack.startswith(prefix),
-                        "{0} does not start with '{1}'".format(
-                            repr(haystack), prefix))
+        self.assertTrue(
+            haystack.startswith(prefix),
+            "{0} does not start with '{1}'".format(repr(haystack), prefix),
+        )
 
     def assertNoMoreSideEffects(self, obj):
         self.assertRaises(StopIteration, obj)
 
     def test_get_metadata_writes_a_single_line(self):
         client = self._get_client()
-        client.get('some_key')
+        client.get("some_key")
         self.assertEqual(1, self.serial.write.call_count)
         written_line = self.serial.write.call_args[0][0]
-        self.assertEndsWith(written_line.decode('ascii'),
-                            b'\n'.decode('ascii'))
-        self.assertEqual(1, written_line.count(b'\n'))
+        self.assertEndsWith(
+            written_line.decode("ascii"), b"\n".decode("ascii")
+        )
+        self.assertEqual(1, written_line.count(b"\n"))
 
-    def _get_written_line(self, key='some_key'):
+    def _get_written_line(self, key="some_key"):
         client = self._get_client()
         client.get(key)
         return self.serial.write.call_args[0][0]
@@ -802,76 +873,86 @@ class TestJoyentMetadataClient(FilesystemMockingTestCase):
 
     def test_get_metadata_line_starts_with_v2(self):
         foo = self._get_written_line()
-        self.assertStartsWith(foo.decode('ascii'), b'V2'.decode('ascii'))
+        self.assertStartsWith(foo.decode("ascii"), b"V2".decode("ascii"))
 
     def test_get_metadata_uses_get_command(self):
-        parts = self._get_written_line().decode('ascii').strip().split(' ')
-        self.assertEqual('GET', parts[4])
+        parts = self._get_written_line().decode("ascii").strip().split(" ")
+        self.assertEqual("GET", parts[4])
 
     def test_get_metadata_base64_encodes_argument(self):
-        key = 'my_key'
-        parts = self._get_written_line(key).decode('ascii').strip().split(' ')
+        key = "my_key"
+        parts = self._get_written_line(key).decode("ascii").strip().split(" ")
         self.assertEqual(b64e(key), parts[5])
 
     def test_get_metadata_calculates_length_correctly(self):
-        parts = self._get_written_line().decode('ascii').strip().split(' ')
-        expected_length = len(' '.join(parts[3:]))
+        parts = self._get_written_line().decode("ascii").strip().split(" ")
+        expected_length = len(" ".join(parts[3:]))
         self.assertEqual(expected_length, int(parts[1]))
 
     def test_get_metadata_uses_appropriate_request_id(self):
-        parts = self._get_written_line().decode('ascii').strip().split(' ')
+        parts = self._get_written_line().decode("ascii").strip().split(" ")
         request_id = parts[3]
         self.assertEqual(8, len(request_id))
         self.assertEqual(request_id, request_id.lower())
 
     def test_get_metadata_uses_random_number_for_request_id(self):
         line = self._get_written_line()
-        request_id = line.decode('ascii').strip().split(' ')[3]
-        self.assertEqual('{0:08x}'.format(self.request_id), request_id)
+        request_id = line.decode("ascii").strip().split(" ")[3]
+        self.assertEqual("{0:08x}".format(self.request_id), request_id)
 
     def test_get_metadata_checksums_correctly(self):
-        parts = self._get_written_line().decode('ascii').strip().split(' ')
-        expected_checksum = '{0:08x}'.format(
-            crc32(' '.join(parts[3:]).encode('utf-8')) & 0xffffffff)
+        parts = self._get_written_line().decode("ascii").strip().split(" ")
+        expected_checksum = "{0:08x}".format(
+            crc32(" ".join(parts[3:]).encode("utf-8")) & 0xFFFFFFFF
+        )
         checksum = parts[2]
         self.assertEqual(expected_checksum, checksum)
 
     def test_get_metadata_reads_a_line(self):
         client = self._get_client()
-        client.get('some_key')
+        client.get("some_key")
         self.assertEqual(self.metasource_data_len, self.serial.read.call_count)
 
     def test_get_metadata_returns_valid_value(self):
         client = self._get_client()
-        value = client.get('some_key')
+        value = client.get("some_key")
         self.assertEqual(self.metadata_value, value)
 
     def test_get_metadata_throws_exception_for_incorrect_length(self):
-        self.response_parts['length'] = 0
+        self.response_parts["length"] = 0
         client = self._get_client()
-        self.assertRaises(DataSourceSmartOS.JoyentMetadataFetchException,
-                          client.get, 'some_key')
+        self.assertRaises(
+            DataSourceSmartOS.JoyentMetadataFetchException,
+            client.get,
+            "some_key",
+        )
 
     def test_get_metadata_throws_exception_for_incorrect_crc(self):
-        self.response_parts['crc'] = 'deadbeef'
+        self.response_parts["crc"] = "deadbeef"
         client = self._get_client()
-        self.assertRaises(DataSourceSmartOS.JoyentMetadataFetchException,
-                          client.get, 'some_key')
+        self.assertRaises(
+            DataSourceSmartOS.JoyentMetadataFetchException,
+            client.get,
+            "some_key",
+        )
 
     def test_get_metadata_throws_exception_for_request_id_mismatch(self):
-        self.response_parts['request_id'] = 'deadbeef'
+        self.response_parts["request_id"] = "deadbeef"
         client = self._get_client()
-        client._checksum = lambda _: self.response_parts['crc']
-        self.assertRaises(DataSourceSmartOS.JoyentMetadataFetchException,
-                          client.get, 'some_key')
+        client._checksum = lambda _: self.response_parts["crc"]
+        self.assertRaises(
+            DataSourceSmartOS.JoyentMetadataFetchException,
+            client.get,
+            "some_key",
+        )
 
     def test_get_metadata_returns_None_if_value_not_found(self):
-        self.response_parts['payload'] = ''
-        self.response_parts['command'] = 'NOTFOUND'
-        self.response_parts['length'] = NOTFOUND_LEN
+        self.response_parts["payload"] = ""
+        self.response_parts["command"] = "NOTFOUND"
+        self.response_parts["length"] = NOTFOUND_LEN
         client = self._get_client()
-        client._checksum = lambda _: self.response_parts['crc']
-        self.assertIsNone(client.get('some_key'))
+        client._checksum = lambda _: self.response_parts["crc"]
+        self.assertIsNone(client.get("some_key"))
 
     def test_negotiate(self):
         client = self._get_client()
@@ -883,55 +964,58 @@ class TestJoyentMetadataClient(FilesystemMockingTestCase):
     def test_negotiate_short_response(self):
         client = self._get_client()
         # chopped '\n' from v2_ok.
-        reader = ShortReader(self.v2_ok[:-1] + b'\0')
+        reader = ShortReader(self.v2_ok[:-1] + b"\0")
         client.fp.read.side_effect = reader.read
-        self.assertRaises(DataSourceSmartOS.JoyentMetadataTimeoutException,
-                          client._negotiate)
+        self.assertRaises(
+            DataSourceSmartOS.JoyentMetadataTimeoutException, client._negotiate
+        )
         self.assertTrue(reader.emptied)
 
     def test_negotiate_bad_response(self):
         client = self._get_client()
-        reader = ShortReader(b'garbage\n' + self.v2_ok)
+        reader = ShortReader(b"garbage\n" + self.v2_ok)
         client.fp.read.side_effect = reader.read
-        self.assertRaises(DataSourceSmartOS.JoyentMetadataFetchException,
-                          client._negotiate)
+        self.assertRaises(
+            DataSourceSmartOS.JoyentMetadataFetchException, client._negotiate
+        )
         self.assertEqual(self.v2_ok, client.fp.read())
 
     def test_serial_open_transport(self):
         client = self._get_serial_client()
-        reader = ShortReader(b'garbage\0' + self.invalid + self.v2_ok)
+        reader = ShortReader(b"garbage\0" + self.invalid + self.v2_ok)
         client.fp.read.side_effect = reader.read
         client.open_transport()
         self.assertTrue(reader.emptied)
 
     def test_flush_failure(self):
         client = self._get_serial_client()
-        reader = ShortReader(b'garbage' + b'\0' + self.failure +
-                             self.invalid + self.v2_ok)
+        reader = ShortReader(
+            b"garbage" + b"\0" + self.failure + self.invalid + self.v2_ok
+        )
         client.fp.read.side_effect = reader.read
         client.open_transport()
         self.assertTrue(reader.emptied)
 
     def test_flush_many_timeouts(self):
         client = self._get_serial_client()
-        reader = ShortReader(b'\0' * 100 + self.invalid + self.v2_ok)
+        reader = ShortReader(b"\0" * 100 + self.invalid + self.v2_ok)
         client.fp.read.side_effect = reader.read
         client.open_transport()
         self.assertTrue(reader.emptied)
 
     def test_list_metadata_returns_list(self):
-        parts = ['foo', 'bar']
-        value = b64e('\n'.join(parts))
-        self.response_parts['payload'] = value
-        self.response_parts['crc'] = '40873553'
-        self.response_parts['length'] = SUCCESS_LEN + len(value)
+        parts = ["foo", "bar"]
+        value = b64e("\n".join(parts))
+        self.response_parts["payload"] = value
+        self.response_parts["crc"] = "40873553"
+        self.response_parts["length"] = SUCCESS_LEN + len(value)
         client = self._get_client()
         self.assertEqual(client.list(), parts)
 
     def test_list_metadata_returns_empty_list_if_no_customer_metadata(self):
-        del self.response_parts['payload']
-        self.response_parts['length'] = SUCCESS_LEN - 1
-        self.response_parts['crc'] = '14e563ba'
+        del self.response_parts["payload"]
+        self.response_parts["length"] = SUCCESS_LEN - 1
+        self.response_parts["crc"] = "14e563ba"
         client = self._get_client()
         self.assertEqual(client.list(), [])
 
@@ -939,181 +1023,354 @@ class TestJoyentMetadataClient(FilesystemMockingTestCase):
 class TestNetworkConversion(CiTestCase):
     def test_convert_simple(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'name': 'net0', 'type': 'physical',
-                 'subnets': [{'type': 'static', 'gateway': '8.12.42.1',
-                              'address': '8.12.42.102/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:f5:e4:f5'},
-                {'name': 'net1', 'type': 'physical',
-                 'subnets': [{'type': 'static',
-                              'address': '192.168.128.93/22'}],
-                 'mtu': 8500, 'mac_address': '90:b8:d0:a5:ff:cd'}]}
+            "version": 1,
+            "config": [
+                {
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "type": "static",
+                            "gateway": "8.12.42.1",
+                            "address": "8.12.42.102/24",
+                        }
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:f5:e4:f5",
+                },
+                {
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [
+                        {"type": "static", "address": "192.168.128.93/22"}
+                    ],
+                    "mtu": 8500,
+                    "mac_address": "90:b8:d0:a5:ff:cd",
+                },
+            ],
+        }
         found = convert_net(SDC_NICS)
         self.assertEqual(expected, found)
 
     def test_convert_simple_alt(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'name': 'net0', 'type': 'physical',
-                 'subnets': [{'type': 'static', 'gateway': '8.12.42.1',
-                              'address': '8.12.42.51/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:ae:64:51'},
-                {'name': 'net1', 'type': 'physical',
-                 'subnets': [{'type': 'static',
-                              'address': '10.210.1.217/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:bd:4f:9c'}]}
+            "version": 1,
+            "config": [
+                {
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "type": "static",
+                            "gateway": "8.12.42.1",
+                            "address": "8.12.42.51/24",
+                        }
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:ae:64:51",
+                },
+                {
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [
+                        {"type": "static", "address": "10.210.1.217/24"}
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:bd:4f:9c",
+                },
+            ],
+        }
         found = convert_net(SDC_NICS_ALT)
         self.assertEqual(expected, found)
 
     def test_convert_simple_dhcp(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'name': 'net0', 'type': 'physical',
-                 'subnets': [{'type': 'static', 'gateway': '8.12.42.1',
-                              'address': '8.12.42.51/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:ae:64:51'},
-                {'name': 'net1', 'type': 'physical',
-                 'subnets': [{'type': 'dhcp4'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:bd:4f:9c'}]}
+            "version": 1,
+            "config": [
+                {
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "type": "static",
+                            "gateway": "8.12.42.1",
+                            "address": "8.12.42.51/24",
+                        }
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:ae:64:51",
+                },
+                {
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [{"type": "dhcp4"}],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:bd:4f:9c",
+                },
+            ],
+        }
         found = convert_net(SDC_NICS_DHCP)
         self.assertEqual(expected, found)
 
     def test_convert_simple_multi_ip(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'name': 'net0', 'type': 'physical',
-                 'subnets': [{'type': 'static', 'gateway': '8.12.42.1',
-                              'address': '8.12.42.51/24'},
-                             {'type': 'static',
-                              'address': '8.12.42.52/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:ae:64:51'},
-                {'name': 'net1', 'type': 'physical',
-                 'subnets': [{'type': 'static',
-                              'address': '10.210.1.217/24'},
-                             {'type': 'static',
-                              'address': '10.210.1.151/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:bd:4f:9c'}]}
+            "version": 1,
+            "config": [
+                {
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "type": "static",
+                            "gateway": "8.12.42.1",
+                            "address": "8.12.42.51/24",
+                        },
+                        {"type": "static", "address": "8.12.42.52/24"},
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:ae:64:51",
+                },
+                {
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [
+                        {"type": "static", "address": "10.210.1.217/24"},
+                        {"type": "static", "address": "10.210.1.151/24"},
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:bd:4f:9c",
+                },
+            ],
+        }
         found = convert_net(SDC_NICS_MIP)
         self.assertEqual(expected, found)
 
     def test_convert_with_dns(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'name': 'net0', 'type': 'physical',
-                 'subnets': [{'type': 'static', 'gateway': '8.12.42.1',
-                              'address': '8.12.42.51/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:ae:64:51'},
-                {'name': 'net1', 'type': 'physical',
-                 'subnets': [{'type': 'dhcp4'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:bd:4f:9c'},
-                {'type': 'nameserver',
-                 'address': ['8.8.8.8', '8.8.8.1'], 'search': ["local"]}]}
+            "version": 1,
+            "config": [
+                {
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "type": "static",
+                            "gateway": "8.12.42.1",
+                            "address": "8.12.42.51/24",
+                        }
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:ae:64:51",
+                },
+                {
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [{"type": "dhcp4"}],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:bd:4f:9c",
+                },
+                {
+                    "type": "nameserver",
+                    "address": ["8.8.8.8", "8.8.8.1"],
+                    "search": ["local"],
+                },
+            ],
+        }
         found = convert_net(
-            network_data=SDC_NICS_DHCP, dns_servers=['8.8.8.8', '8.8.8.1'],
-            dns_domain="local")
+            network_data=SDC_NICS_DHCP,
+            dns_servers=["8.8.8.8", "8.8.8.1"],
+            dns_domain="local",
+        )
         self.assertEqual(expected, found)
 
     def test_convert_simple_multi_ipv6(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'name': 'net0', 'type': 'physical',
-                 'subnets': [{'type': 'static', 'address':
-                              '2001:4800:78ff:1b:be76:4eff:fe06:96b3/64'},
-                             {'type': 'static', 'gateway': '8.12.42.1',
-                              'address': '8.12.42.51/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:ae:64:51'},
-                {'name': 'net1', 'type': 'physical',
-                 'subnets': [{'type': 'static',
-                              'address': '10.210.1.217/24'}],
-                 'mtu': 1500, 'mac_address': '90:b8:d0:bd:4f:9c'}]}
+            "version": 1,
+            "config": [
+                {
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "type": "static",
+                            "address": (
+                                "2001:4800:78ff:1b:be76:4eff:fe06:96b3/64"
+                            ),
+                        },
+                        {
+                            "type": "static",
+                            "gateway": "8.12.42.1",
+                            "address": "8.12.42.51/24",
+                        },
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:ae:64:51",
+                },
+                {
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [
+                        {"type": "static", "address": "10.210.1.217/24"}
+                    ],
+                    "mtu": 1500,
+                    "mac_address": "90:b8:d0:bd:4f:9c",
+                },
+            ],
+        }
         found = convert_net(SDC_NICS_MIP_IPV6)
         self.assertEqual(expected, found)
 
     def test_convert_simple_both_ipv4_ipv6(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'mac_address': '90:b8:d0:ae:64:51', 'mtu': 1500,
-                 'name': 'net0', 'type': 'physical',
-                 'subnets': [{'address': '2001::10/64', 'gateway': '2001::1',
-                              'type': 'static'},
-                             {'address': '8.12.42.51/24',
-                              'gateway': '8.12.42.1',
-                              'type': 'static'},
-                             {'address': '2001::11/64', 'type': 'static'},
-                             {'address': '8.12.42.52/32', 'type': 'static'}]},
-                {'mac_address': '90:b8:d0:bd:4f:9c', 'mtu': 1500,
-                 'name': 'net1', 'type': 'physical',
-                 'subnets': [{'address': '10.210.1.217/24',
-                              'type': 'static'}]}]}
+            "version": 1,
+            "config": [
+                {
+                    "mac_address": "90:b8:d0:ae:64:51",
+                    "mtu": 1500,
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "address": "2001::10/64",
+                            "gateway": "2001::1",
+                            "type": "static",
+                        },
+                        {
+                            "address": "8.12.42.51/24",
+                            "gateway": "8.12.42.1",
+                            "type": "static",
+                        },
+                        {"address": "2001::11/64", "type": "static"},
+                        {"address": "8.12.42.52/32", "type": "static"},
+                    ],
+                },
+                {
+                    "mac_address": "90:b8:d0:bd:4f:9c",
+                    "mtu": 1500,
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [
+                        {"address": "10.210.1.217/24", "type": "static"}
+                    ],
+                },
+            ],
+        }
         found = convert_net(SDC_NICS_IPV4_IPV6)
         self.assertEqual(expected, found)
 
     def test_gateways_not_on_all_nics(self):
         expected = {
-            'version': 1,
-            'config': [
-                {'mac_address': '90:b8:d0:d8:82:b4', 'mtu': 1500,
-                 'name': 'net0', 'type': 'physical',
-                 'subnets': [{'address': '8.12.42.26/24',
-                              'gateway': '8.12.42.1', 'type': 'static'}]},
-                {'mac_address': '90:b8:d0:0a:51:31', 'mtu': 1500,
-                 'name': 'net1', 'type': 'physical',
-                 'subnets': [{'address': '10.210.1.27/24',
-                              'type': 'static'}]}]}
+            "version": 1,
+            "config": [
+                {
+                    "mac_address": "90:b8:d0:d8:82:b4",
+                    "mtu": 1500,
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "address": "8.12.42.26/24",
+                            "gateway": "8.12.42.1",
+                            "type": "static",
+                        }
+                    ],
+                },
+                {
+                    "mac_address": "90:b8:d0:0a:51:31",
+                    "mtu": 1500,
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [
+                        {"address": "10.210.1.27/24", "type": "static"}
+                    ],
+                },
+            ],
+        }
         found = convert_net(SDC_NICS_SINGLE_GATEWAY)
         self.assertEqual(expected, found)
 
     def test_routes_on_all_nics(self):
         routes = [
-            {'linklocal': False, 'dst': '3.0.0.0/8', 'gateway': '8.12.42.3'},
-            {'linklocal': False, 'dst': '4.0.0.0/8', 'gateway': '10.210.1.4'}]
+            {"linklocal": False, "dst": "3.0.0.0/8", "gateway": "8.12.42.3"},
+            {"linklocal": False, "dst": "4.0.0.0/8", "gateway": "10.210.1.4"},
+        ]
         expected = {
-            'version': 1,
-            'config': [
-                {'mac_address': '90:b8:d0:d8:82:b4', 'mtu': 1500,
-                 'name': 'net0', 'type': 'physical',
-                 'subnets': [{'address': '8.12.42.26/24',
-                              'gateway': '8.12.42.1', 'type': 'static',
-                              'routes': [{'network': '3.0.0.0/8',
-                                          'gateway': '8.12.42.3'},
-                                         {'network': '4.0.0.0/8',
-                                         'gateway': '10.210.1.4'}]}]},
-                {'mac_address': '90:b8:d0:0a:51:31', 'mtu': 1500,
-                 'name': 'net1', 'type': 'physical',
-                 'subnets': [{'address': '10.210.1.27/24', 'type': 'static',
-                              'routes': [{'network': '3.0.0.0/8',
-                                          'gateway': '8.12.42.3'},
-                                         {'network': '4.0.0.0/8',
-                                         'gateway': '10.210.1.4'}]}]}]}
+            "version": 1,
+            "config": [
+                {
+                    "mac_address": "90:b8:d0:d8:82:b4",
+                    "mtu": 1500,
+                    "name": "net0",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "address": "8.12.42.26/24",
+                            "gateway": "8.12.42.1",
+                            "type": "static",
+                            "routes": [
+                                {
+                                    "network": "3.0.0.0/8",
+                                    "gateway": "8.12.42.3",
+                                },
+                                {
+                                    "network": "4.0.0.0/8",
+                                    "gateway": "10.210.1.4",
+                                },
+                            ],
+                        }
+                    ],
+                },
+                {
+                    "mac_address": "90:b8:d0:0a:51:31",
+                    "mtu": 1500,
+                    "name": "net1",
+                    "type": "physical",
+                    "subnets": [
+                        {
+                            "address": "10.210.1.27/24",
+                            "type": "static",
+                            "routes": [
+                                {
+                                    "network": "3.0.0.0/8",
+                                    "gateway": "8.12.42.3",
+                                },
+                                {
+                                    "network": "4.0.0.0/8",
+                                    "gateway": "10.210.1.4",
+                                },
+                            ],
+                        }
+                    ],
+                },
+            ],
+        }
         found = convert_net(SDC_NICS_SINGLE_GATEWAY, routes=routes)
         self.maxDiff = None
         self.assertEqual(expected, found)
 
 
-@unittest.skipUnless(get_smartos_environ() == SMARTOS_ENV_KVM,
-                     "Only supported on KVM and bhyve guests under SmartOS")
-@unittest.skipUnless(os.access(SERIAL_DEVICE, os.W_OK),
-                     "Requires write access to " + SERIAL_DEVICE)
+@unittest.skipUnless(
+    get_smartos_environ() == SMARTOS_ENV_KVM,
+    "Only supported on KVM and bhyve guests under SmartOS",
+)
+@unittest.skipUnless(
+    os.access(SERIAL_DEVICE, os.W_OK),
+    "Requires write access to " + SERIAL_DEVICE,
+)
 @unittest.skipUnless(HAS_PYSERIAL is True, "pyserial not available")
 class TestSerialConcurrency(CiTestCase):
     """
-       This class tests locking on an actual serial port, and as such can only
-       be run in a kvm or bhyve guest running on a SmartOS host.  A test run on
-       a metadata socket will not be valid because a metadata socket ensures
-       there is only one session over a connection.  In contrast, in the
-       absence of proper locking multiple processes opening the same serial
-       port can corrupt each others' exchanges with the metadata server.
-
-       This takes on the order of 2 to 3 minutes to run.
+    This class tests locking on an actual serial port, and as such can only
+    be run in a kvm or bhyve guest running on a SmartOS host.  A test run on
+    a metadata socket will not be valid because a metadata socket ensures
+    there is only one session over a connection.  In contrast, in the
+    absence of proper locking multiple processes opening the same serial
+    port can corrupt each others' exchanges with the metadata server.
+
+    This takes on the order of 2 to 3 minutes to run.
     """
-    allowed_subp = ['mdata-get']
+
+    allowed_subp = ["mdata-get"]
 
     def setUp(self):
         self.mdata_proc = multiprocessing.Process(target=self.start_mdata_loop)
@@ -1128,16 +1385,16 @@ class TestSerialConcurrency(CiTestCase):
 
     def start_mdata_loop(self):
         """
-           The mdata-get command is repeatedly run in a separate process so
-           that it may try to race with metadata operations performed in the
-           main test process.  Use of mdata-get is better than two processes
-           using the protocol implementation in DataSourceSmartOS because we
-           are testing to be sure that cloud-init and mdata-get respect each
-           others locks.
+        The mdata-get command is repeatedly run in a separate process so
+        that it may try to race with metadata operations performed in the
+        main test process.  Use of mdata-get is better than two processes
+        using the protocol implementation in DataSourceSmartOS because we
+        are testing to be sure that cloud-init and mdata-get respect each
+        others locks.
         """
         rcs = list(range(0, 256))
         while True:
-            subp(['mdata-get', 'sdc:routes'], rcs=rcs)
+            subp(["mdata-get", "sdc:routes"], rcs=rcs)
 
     def test_all_keys(self):
         self.assertIsNotNone(self.mdata_proc.pid)
@@ -1160,4 +1417,5 @@ class TestSerialConcurrency(CiTestCase):
 
         self.assertIsNone(self.mdata_proc.exitcode)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_upcloud.py b/tests/unittests/sources/test_upcloud.py
index 1d792066..e1125b65 100644
--- a/tests/unittests/sources/test_upcloud.py
+++ b/tests/unittests/sources/test_upcloud.py
@@ -4,15 +4,15 @@
 
 import json
 
-from cloudinit import helpers
-from cloudinit import settings
-from cloudinit import sources
-from cloudinit.sources.DataSourceUpCloud import DataSourceUpCloud, \
-    DataSourceUpCloudLocal
-
-from tests.unittests.helpers import mock, CiTestCase
-
-UC_METADATA = json.loads("""
+from cloudinit import helpers, settings, sources
+from cloudinit.sources.DataSourceUpCloud import (
+    DataSourceUpCloud,
+    DataSourceUpCloudLocal,
+)
+from tests.unittests.helpers import CiTestCase, mock
+
+UC_METADATA = json.loads(
+    """
 {
   "cloud_name": "upcloud",
   "instance_id": "00322b68-0096-4042-9406-faad61922128",
@@ -130,14 +130,17 @@ UC_METADATA = json.loads("""
   "user_data": "",
   "vendor_data": ""
 }
-""")
+"""
+)
 
-UC_METADATA["user_data"] = b"""#cloud-config
+UC_METADATA[
+    "user_data"
+] = b"""#cloud-config
 runcmd:
 - [touch, /root/cloud-init-worked ]
 """
 
-MD_URL = 'http://169.254.169.254/metadata/v1.json'
+MD_URL = "http://169.254.169.254/metadata/v1.json"
 
 
 def _mock_dmi():
@@ -148,25 +151,27 @@ class TestUpCloudMetadata(CiTestCase):
     """
     Test reading the meta-data
     """
+
     def setUp(self):
         super(TestUpCloudMetadata, self).setUp()
         self.tmp = self.tmp_dir()
 
     def get_ds(self, get_sysinfo=_mock_dmi):
         ds = DataSourceUpCloud(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         if get_sysinfo:
             ds._get_sysinfo = get_sysinfo
         return ds
 
-    @mock.patch('cloudinit.sources.helpers.upcloud.read_sysinfo')
+    @mock.patch("cloudinit.sources.helpers.upcloud.read_sysinfo")
     def test_returns_false_not_on_upcloud(self, m_read_sysinfo):
         m_read_sysinfo.return_value = (False, None)
         ds = self.get_ds(get_sysinfo=None)
         self.assertEqual(False, ds.get_data())
         self.assertTrue(m_read_sysinfo.called)
 
-    @mock.patch('cloudinit.sources.helpers.upcloud.read_metadata')
+    @mock.patch("cloudinit.sources.helpers.upcloud.read_metadata")
     def test_metadata(self, mock_readmd):
         mock_readmd.return_value = UC_METADATA.copy()
 
@@ -178,15 +183,17 @@ class TestUpCloudMetadata(CiTestCase):
 
         self.assertTrue(mock_readmd.called)
 
-        self.assertEqual(UC_METADATA.get('user_data'), ds.get_userdata_raw())
-        self.assertEqual(UC_METADATA.get('vendor_data'),
-                         ds.get_vendordata_raw())
-        self.assertEqual(UC_METADATA.get('region'), ds.availability_zone)
-        self.assertEqual(UC_METADATA.get('instance_id'), ds.get_instance_id())
-        self.assertEqual(UC_METADATA.get('cloud_name'), ds.cloud_name)
+        self.assertEqual(UC_METADATA.get("user_data"), ds.get_userdata_raw())
+        self.assertEqual(
+            UC_METADATA.get("vendor_data"), ds.get_vendordata_raw()
+        )
+        self.assertEqual(UC_METADATA.get("region"), ds.availability_zone)
+        self.assertEqual(UC_METADATA.get("instance_id"), ds.get_instance_id())
+        self.assertEqual(UC_METADATA.get("cloud_name"), ds.cloud_name)
 
-        self.assertEqual(UC_METADATA.get('public_keys'),
-                         ds.get_public_ssh_keys())
+        self.assertEqual(
+            UC_METADATA.get("public_keys"), ds.get_public_ssh_keys()
+        )
         self.assertIsInstance(ds.get_public_ssh_keys(), list)
 
 
@@ -201,24 +208,30 @@ class TestUpCloudNetworkSetup(CiTestCase):
 
     def get_ds(self, get_sysinfo=_mock_dmi):
         ds = DataSourceUpCloudLocal(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
         if get_sysinfo:
             ds._get_sysinfo = get_sysinfo
         return ds
 
-    @mock.patch('cloudinit.sources.helpers.upcloud.read_metadata')
-    @mock.patch('cloudinit.net.find_fallback_nic')
-    @mock.patch('cloudinit.net.dhcp.maybe_perform_dhcp_discovery')
-    @mock.patch('cloudinit.net.dhcp.EphemeralIPv4Network')
-    def test_network_configured_metadata(self, m_net, m_dhcp,
-                                         m_fallback_nic, mock_readmd):
+    @mock.patch("cloudinit.sources.helpers.upcloud.read_metadata")
+    @mock.patch("cloudinit.net.find_fallback_nic")
+    @mock.patch("cloudinit.net.dhcp.maybe_perform_dhcp_discovery")
+    @mock.patch("cloudinit.net.dhcp.EphemeralIPv4Network")
+    def test_network_configured_metadata(
+        self, m_net, m_dhcp, m_fallback_nic, mock_readmd
+    ):
         mock_readmd.return_value = UC_METADATA.copy()
 
-        m_fallback_nic.return_value = 'eth1'
-        m_dhcp.return_value = [{
-            'interface': 'eth1', 'fixed-address': '10.6.3.27',
-            'routers': '10.6.0.1', 'subnet-mask': '22',
-            'broadcast-address': '10.6.3.255'}
+        m_fallback_nic.return_value = "eth1"
+        m_dhcp.return_value = [
+            {
+                "interface": "eth1",
+                "fixed-address": "10.6.3.27",
+                "routers": "10.6.0.1",
+                "subnet-mask": "22",
+                "broadcast-address": "10.6.3.255",
+            }
         ]
 
         ds = self.get_ds()
@@ -227,33 +240,36 @@ class TestUpCloudNetworkSetup(CiTestCase):
         self.assertTrue(ret)
 
         self.assertTrue(m_dhcp.called)
-        m_dhcp.assert_called_with('eth1', None)
+        m_dhcp.assert_called_with("eth1", None)
 
         m_net.assert_called_once_with(
-            broadcast='10.6.3.255', interface='eth1',
-            ip='10.6.3.27', prefix_or_mask='22',
-            router='10.6.0.1', static_routes=None
+            broadcast="10.6.3.255",
+            interface="eth1",
+            ip="10.6.3.27",
+            prefix_or_mask="22",
+            router="10.6.0.1",
+            static_routes=None,
         )
 
         self.assertTrue(mock_readmd.called)
 
-        self.assertEqual(UC_METADATA.get('region'), ds.availability_zone)
-        self.assertEqual(UC_METADATA.get('instance_id'), ds.get_instance_id())
-        self.assertEqual(UC_METADATA.get('cloud_name'), ds.cloud_name)
+        self.assertEqual(UC_METADATA.get("region"), ds.availability_zone)
+        self.assertEqual(UC_METADATA.get("instance_id"), ds.get_instance_id())
+        self.assertEqual(UC_METADATA.get("cloud_name"), ds.cloud_name)
 
-    @mock.patch('cloudinit.sources.helpers.upcloud.read_metadata')
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.sources.helpers.upcloud.read_metadata")
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_network_configuration(self, m_get_by_mac, mock_readmd):
         mock_readmd.return_value = UC_METADATA.copy()
 
-        raw_ifaces = UC_METADATA.get('network').get('interfaces')
+        raw_ifaces = UC_METADATA.get("network").get("interfaces")
         self.assertEqual(4, len(raw_ifaces))
 
         m_get_by_mac.return_value = {
-            raw_ifaces[0].get('mac'): 'eth0',
-            raw_ifaces[1].get('mac'): 'eth1',
-            raw_ifaces[2].get('mac'): 'eth2',
-            raw_ifaces[3].get('mac'): 'eth3',
+            raw_ifaces[0].get("mac"): "eth0",
+            raw_ifaces[1].get("mac"): "eth1",
+            raw_ifaces[2].get("mac"): "eth2",
+            raw_ifaces[3].get("mac"): "eth3",
         }
 
         ds = self.get_ds()
@@ -266,49 +282,50 @@ class TestUpCloudNetworkSetup(CiTestCase):
 
         netcfg = ds.network_config
 
-        self.assertEqual(1, netcfg.get('version'))
+        self.assertEqual(1, netcfg.get("version"))
 
-        config = netcfg.get('config')
+        config = netcfg.get("config")
         self.assertIsInstance(config, list)
         self.assertEqual(5, len(config))
-        self.assertEqual('physical', config[3].get('type'))
+        self.assertEqual("physical", config[3].get("type"))
 
-        self.assertEqual(raw_ifaces[2].get('mac'), config[2]
-                         .get('mac_address'))
-        self.assertEqual(1, len(config[2].get('subnets')))
-        self.assertEqual('ipv6_dhcpv6-stateless', config[2].get('subnets')[0]
-                         .get('type'))
+        self.assertEqual(
+            raw_ifaces[2].get("mac"), config[2].get("mac_address")
+        )
+        self.assertEqual(1, len(config[2].get("subnets")))
+        self.assertEqual(
+            "ipv6_dhcpv6-stateless", config[2].get("subnets")[0].get("type")
+        )
 
-        self.assertEqual(2, len(config[0].get('subnets')))
-        self.assertEqual('static', config[0].get('subnets')[1].get('type'))
+        self.assertEqual(2, len(config[0].get("subnets")))
+        self.assertEqual("static", config[0].get("subnets")[1].get("type"))
 
         dns = config[4]
-        self.assertEqual('nameserver', dns.get('type'))
-        self.assertEqual(2, len(dns.get('address')))
+        self.assertEqual("nameserver", dns.get("type"))
+        self.assertEqual(2, len(dns.get("address")))
         self.assertEqual(
-            UC_METADATA.get('network').get('dns')[1],
-            dns.get('address')[1]
+            UC_METADATA.get("network").get("dns")[1], dns.get("address")[1]
         )
 
 
 class TestUpCloudDatasourceLoading(CiTestCase):
     def test_get_datasource_list_returns_in_local(self):
-        deps = (sources.DEP_FILESYSTEM, )
+        deps = (sources.DEP_FILESYSTEM,)
         ds_list = sources.DataSourceUpCloud.get_datasource_list(deps)
-        self.assertEqual(ds_list,
-                         [DataSourceUpCloudLocal])
+        self.assertEqual(ds_list, [DataSourceUpCloudLocal])
 
     def test_get_datasource_list_returns_in_normal(self):
         deps = (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)
         ds_list = sources.DataSourceUpCloud.get_datasource_list(deps)
-        self.assertEqual(ds_list,
-                         [DataSourceUpCloud])
+        self.assertEqual(ds_list, [DataSourceUpCloud])
 
     def test_list_sources_finds_ds(self):
         found = sources.list_sources(
-            ['UpCloud'], (sources.DEP_FILESYSTEM, sources.DEP_NETWORK),
-            ['cloudinit.sources'])
-        self.assertEqual([DataSourceUpCloud],
-                         found)
+            ["UpCloud"],
+            (sources.DEP_FILESYSTEM, sources.DEP_NETWORK),
+            ["cloudinit.sources"],
+        )
+        self.assertEqual([DataSourceUpCloud], found)
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/test_vmware.py b/tests/unittests/sources/test_vmware.py
index d34d7782..dcdbda89 100644
--- a/tests/unittests/sources/test_vmware.py
+++ b/tests/unittests/sources/test_vmware.py
@@ -10,17 +10,15 @@ import os
 
 import pytest
 
-from cloudinit import dmi, helpers, safeyaml
-from cloudinit import settings
+from cloudinit import dmi, helpers, safeyaml, settings
 from cloudinit.sources import DataSourceVMware
 from tests.unittests.helpers import (
-    mock,
     CiTestCase,
     FilesystemMockingTestCase,
+    mock,
     populate_dir,
 )
 
-
 PRODUCT_NAME_FILE_PATH = "/sys/class/dmi/id/product_name"
 PRODUCT_NAME = "VMware7,1"
 PRODUCT_UUID = "82343CED-E4C7-423B-8F6B-0D34D19067AB"
@@ -61,11 +59,11 @@ runcmd:
 
 @pytest.yield_fixture(autouse=True)
 def common_patches():
-    with mock.patch('cloudinit.util.platform.platform', return_value='Linux'):
+    with mock.patch("cloudinit.util.platform.platform", return_value="Linux"):
         with mock.patch.multiple(
-            'cloudinit.dmi',
+            "cloudinit.dmi",
             is_container=mock.Mock(return_value=False),
-            is_FreeBSD=mock.Mock(return_value=False)
+            is_FreeBSD=mock.Mock(return_value=False),
         ):
             yield
 
diff --git a/tests/unittests/sources/test_vultr.py b/tests/unittests/sources/test_vultr.py
index 40594b95..21d5bc17 100644
--- a/tests/unittests/sources/test_vultr.py
+++ b/tests/unittests/sources/test_vultr.py
@@ -7,255 +7,204 @@
 
 import json
 
-from cloudinit import helpers
-from cloudinit import settings
+from cloudinit import helpers, settings
 from cloudinit.sources import DataSourceVultr
 from cloudinit.sources.helpers import vultr
-
-from tests.unittests.helpers import mock, CiTestCase
+from tests.unittests.helpers import CiTestCase, mock
 
 # Vultr metadata test data
 VULTR_V1_1 = {
-    'bgp': {
-        'ipv4': {
-            'my-address': '',
-            'my-asn': '',
-            'peer-address': '',
-            'peer-asn': ''
+    "bgp": {
+        "ipv4": {
+            "my-address": "",
+            "my-asn": "",
+            "peer-address": "",
+            "peer-asn": "",
+        },
+        "ipv6": {
+            "my-address": "",
+            "my-asn": "",
+            "peer-address": "",
+            "peer-asn": "",
         },
-        'ipv6': {
-            'my-address': '',
-            'my-asn': '',
-            'peer-address': '',
-            'peer-asn': ''
-        }
     },
-    'hostname': 'CLOUDINIT_1',
-    'instanceid': '42506325',
-    'interfaces': [
+    "hostname": "CLOUDINIT_1",
+    "instanceid": "42506325",
+    "interfaces": [
         {
-            'ipv4': {
-                'additional': [
-                ],
-                'address': '108.61.89.242',
-                'gateway': '108.61.89.1',
-                'netmask': '255.255.255.0'
+            "ipv4": {
+                "additional": [],
+                "address": "108.61.89.242",
+                "gateway": "108.61.89.1",
+                "netmask": "255.255.255.0",
             },
-            'ipv6': {
-                'additional': [
-                ],
-                'address': '2001:19f0:5:56c2:5400:03ff:fe15:c465',
-                'network': '2001:19f0:5:56c2::',
-                'prefix': '64'
+            "ipv6": {
+                "additional": [],
+                "address": "2001:19f0:5:56c2:5400:03ff:fe15:c465",
+                "network": "2001:19f0:5:56c2::",
+                "prefix": "64",
             },
-            'mac': '56:00:03:15:c4:65',
-            'network-type': 'public'
+            "mac": "56:00:03:15:c4:65",
+            "network-type": "public",
         }
     ],
-    'public-keys': [
-        'ssh-rsa AAAAB3NzaC1y...IQQhv5PAOKaIl+mM3c= test3@key'
-    ],
-    'region': {
-        'regioncode': 'EWR'
-    },
-    'user-defined': [
-    ],
-    'startup-script': 'echo No configured startup script',
-    'raid1-script': '',
-    'user-data': [
-    ],
-    'vendor-data': [
+    "public-keys": ["ssh-rsa AAAAB3NzaC1y...IQQhv5PAOKaIl+mM3c= test3@key"],
+    "region": {"regioncode": "EWR"},
+    "user-defined": [],
+    "startup-script": "echo No configured startup script",
+    "raid1-script": "",
+    "user-data": [],
+    "vendor-data": [
         {
-            'package_upgrade': 'true',
-            'disable_root': 0,
-            'ssh_pwauth': 1,
-            'chpasswd': {
-                'expire': False,
-                'list': [
-                    'root:$6$S2Smuj.../VqxmIR9Urw0jPZ88i4yvB/'
-                ]
+            "package_upgrade": "true",
+            "disable_root": 0,
+            "ssh_pwauth": 1,
+            "chpasswd": {
+                "expire": False,
+                "list": ["root:$6$S2Smuj.../VqxmIR9Urw0jPZ88i4yvB/"],
             },
-            'system_info': {
-                'default_user': {
-                    'name': 'root'
-                }
-            }
+            "system_info": {"default_user": {"name": "root"}},
         }
-    ]
+    ],
 }
 
 VULTR_V1_2 = {
-    'bgp': {
-        'ipv4': {
-            'my-address': '',
-            'my-asn': '',
-            'peer-address': '',
-            'peer-asn': ''
+    "bgp": {
+        "ipv4": {
+            "my-address": "",
+            "my-asn": "",
+            "peer-address": "",
+            "peer-asn": "",
+        },
+        "ipv6": {
+            "my-address": "",
+            "my-asn": "",
+            "peer-address": "",
+            "peer-asn": "",
         },
-        'ipv6': {
-            'my-address': '',
-            'my-asn': '',
-            'peer-address': '',
-            'peer-asn': ''
-        }
     },
-    'hostname': 'CLOUDINIT_2',
-    'instance-v2-id': '29bea708-2e6e-480a-90ad-0e6b5d5ad62f',
-    'instanceid': '42872224',
-    'interfaces': [
+    "hostname": "CLOUDINIT_2",
+    "instance-v2-id": "29bea708-2e6e-480a-90ad-0e6b5d5ad62f",
+    "instanceid": "42872224",
+    "interfaces": [
         {
-            'ipv4': {
-                'additional': [
-                ],
-                'address':'45.76.7.171',
-                'gateway':'45.76.6.1',
-                'netmask':'255.255.254.0'
+            "ipv4": {
+                "additional": [],
+                "address": "45.76.7.171",
+                "gateway": "45.76.6.1",
+                "netmask": "255.255.254.0",
             },
-            'ipv6':{
-                'additional': [
-                ],
-                'address':'2001:19f0:5:28a7:5400:03ff:fe1b:4eca',
-                'network':'2001:19f0:5:28a7::',
-                'prefix':'64'
+            "ipv6": {
+                "additional": [],
+                "address": "2001:19f0:5:28a7:5400:03ff:fe1b:4eca",
+                "network": "2001:19f0:5:28a7::",
+                "prefix": "64",
             },
-            'mac':'56:00:03:1b:4e:ca',
-            'network-type':'public'
+            "mac": "56:00:03:1b:4e:ca",
+            "network-type": "public",
         },
         {
-            'ipv4': {
-                'additional': [
-                ],
-                'address':'10.1.112.3',
-                'gateway':'',
-                'netmask':'255.255.240.0'
-            },
-            'ipv6':{
-                'additional': [
-                ],
-                'network':'',
-                'prefix':''
+            "ipv4": {
+                "additional": [],
+                "address": "10.1.112.3",
+                "gateway": "",
+                "netmask": "255.255.240.0",
             },
-            'mac':'5a:00:03:1b:4e:ca',
-            'network-type':'private',
-            'network-v2-id':'fbbe2b5b-b986-4396-87f5-7246660ccb64',
-            'networkid':'net5e7155329d730'
-        }
-    ],
-    'public-keys': [
-        'ssh-rsa AAAAB3NzaC1y...IQQhv5PAOKaIl+mM3c= test3@key'
-    ],
-    'region': {
-        'regioncode': 'EWR'
-    },
-    'user-defined': [
-    ],
-    'startup-script': 'echo No configured startup script',
-    'user-data': [
+            "ipv6": {"additional": [], "network": "", "prefix": ""},
+            "mac": "5a:00:03:1b:4e:ca",
+            "network-type": "private",
+            "network-v2-id": "fbbe2b5b-b986-4396-87f5-7246660ccb64",
+            "networkid": "net5e7155329d730",
+        },
     ],
-
-    'vendor-data': [
+    "public-keys": ["ssh-rsa AAAAB3NzaC1y...IQQhv5PAOKaIl+mM3c= test3@key"],
+    "region": {"regioncode": "EWR"},
+    "user-defined": [],
+    "startup-script": "echo No configured startup script",
+    "user-data": [],
+    "vendor-data": [
         {
-            'package_upgrade': 'true',
-            'disable_root': 0,
-            'ssh_pwauth': 1,
-            'chpasswd': {
-                'expire': False,
-                'list': [
-                    'root:$6$SxXx...k2mJNIzZB5vMCDBlYT1'
-                ]
+            "package_upgrade": "true",
+            "disable_root": 0,
+            "ssh_pwauth": 1,
+            "chpasswd": {
+                "expire": False,
+                "list": ["root:$6$SxXx...k2mJNIzZB5vMCDBlYT1"],
             },
-            'system_info': {
-                'default_user': {
-                    'name': 'root'
-                }
-            }
+            "system_info": {"default_user": {"name": "root"}},
         }
-    ]
+    ],
 }
 
-SSH_KEYS_1 = [
-    "ssh-rsa AAAAB3NzaC1y...IQQhv5PAOKaIl+mM3c= test3@key"
-]
+SSH_KEYS_1 = ["ssh-rsa AAAAB3NzaC1y...IQQhv5PAOKaIl+mM3c= test3@key"]
 
 # Expected generated objects
 
 # Expected config
 EXPECTED_VULTR_CONFIG = {
-    'package_upgrade': 'true',
-    'disable_root': 0,
-    'ssh_pwauth': 1,
-    'chpasswd': {
-        'expire': False,
-        'list': [
-            'root:$6$SxXx...k2mJNIzZB5vMCDBlYT1'
-        ]
+    "package_upgrade": "true",
+    "disable_root": 0,
+    "ssh_pwauth": 1,
+    "chpasswd": {
+        "expire": False,
+        "list": ["root:$6$SxXx...k2mJNIzZB5vMCDBlYT1"],
     },
-    'system_info': {
-        'default_user': {
-            'name': 'root'
-        }
-    }
+    "system_info": {"default_user": {"name": "root"}},
 }
 
 # Expected network config object from generator
 EXPECTED_VULTR_NETWORK_1 = {
-    'version': 1,
-    'config': [
+    "version": 1,
+    "config": [
+        {"type": "nameserver", "address": ["108.61.10.10"]},
         {
-            'type': 'nameserver',
-            'address': ['108.61.10.10']
-        },
-        {
-            'name': 'eth0',
-            'type': 'physical',
-            'mac_address': '56:00:03:15:c4:65',
-            'accept-ra': 1,
-            'subnets': [
-                {'type': 'dhcp', 'control': 'auto'},
-                {'type': 'ipv6_slaac', 'control': 'auto'}
+            "name": "eth0",
+            "type": "physical",
+            "mac_address": "56:00:03:15:c4:65",
+            "accept-ra": 1,
+            "subnets": [
+                {"type": "dhcp", "control": "auto"},
+                {"type": "ipv6_slaac", "control": "auto"},
             ],
-        }
-    ]
+        },
+    ],
 }
 
 EXPECTED_VULTR_NETWORK_2 = {
-    'version': 1,
-    'config': [
+    "version": 1,
+    "config": [
+        {"type": "nameserver", "address": ["108.61.10.10"]},
         {
-            'type': 'nameserver',
-            'address': ['108.61.10.10']
-        },
-        {
-            'name': 'eth0',
-            'type': 'physical',
-            'mac_address': '56:00:03:1b:4e:ca',
-            'accept-ra': 1,
-            'subnets': [
-                {'type': 'dhcp', 'control': 'auto'},
-                {'type': 'ipv6_slaac', 'control': 'auto'}
+            "name": "eth0",
+            "type": "physical",
+            "mac_address": "56:00:03:1b:4e:ca",
+            "accept-ra": 1,
+            "subnets": [
+                {"type": "dhcp", "control": "auto"},
+                {"type": "ipv6_slaac", "control": "auto"},
             ],
         },
         {
-            'name': 'eth1',
-            'type': 'physical',
-            'mac_address': '5a:00:03:1b:4e:ca',
-            'subnets': [
+            "name": "eth1",
+            "type": "physical",
+            "mac_address": "5a:00:03:1b:4e:ca",
+            "subnets": [
                 {
                     "type": "static",
                     "control": "auto",
                     "address": "10.1.112.3",
-                    "netmask": "255.255.240.0"
+                    "netmask": "255.255.240.0",
                 }
             ],
-        }
-    ]
+        },
+    ],
 }
 
 
 INTERFACE_MAP = {
-    '56:00:03:15:c4:65': 'eth0',
-    '56:00:03:1b:4e:ca': 'eth0',
-    '5a:00:03:1b:4e:ca': 'eth1'
+    "56:00:03:15:c4:65": "eth0",
+    "56:00:03:1b:4e:ca": "eth0",
+    "5a:00:03:1b:4e:ca": "eth1",
 }
 
 
@@ -264,41 +213,39 @@ class TestDataSourceVultr(CiTestCase):
         super(TestDataSourceVultr, self).setUp()
 
         # Stored as a dict to make it easier to maintain
-        raw1 = json.dumps(VULTR_V1_1['vendor-data'][0])
-        raw2 = json.dumps(VULTR_V1_2['vendor-data'][0])
+        raw1 = json.dumps(VULTR_V1_1["vendor-data"][0])
+        raw2 = json.dumps(VULTR_V1_2["vendor-data"][0])
 
         # Make expected format
-        VULTR_V1_1['vendor-data'] = [raw1]
-        VULTR_V1_2['vendor-data'] = [raw2]
+        VULTR_V1_1["vendor-data"] = [raw1]
+        VULTR_V1_2["vendor-data"] = [raw2]
 
         self.tmp = self.tmp_dir()
 
     # Test the datasource itself
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
-    @mock.patch('cloudinit.sources.helpers.vultr.is_vultr')
-    @mock.patch('cloudinit.sources.helpers.vultr.get_metadata')
-    def test_datasource(self,
-                        mock_getmeta,
-                        mock_isvultr,
-                        mock_netmap):
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
+    @mock.patch("cloudinit.sources.helpers.vultr.is_vultr")
+    @mock.patch("cloudinit.sources.helpers.vultr.get_metadata")
+    def test_datasource(self, mock_getmeta, mock_isvultr, mock_netmap):
         mock_getmeta.return_value = VULTR_V1_2
         mock_isvultr.return_value = True
         mock_netmap.return_value = INTERFACE_MAP
 
         source = DataSourceVultr.DataSourceVultr(
-            settings.CFG_BUILTIN, None, helpers.Paths({'run_dir': self.tmp}))
+            settings.CFG_BUILTIN, None, helpers.Paths({"run_dir": self.tmp})
+        )
 
         # Test for failure
         self.assertEqual(True, source._get_data())
 
         # Test instance id
-        self.assertEqual("42872224", source.metadata['instanceid'])
+        self.assertEqual("42872224", source.metadata["instanceid"])
 
         # Test hostname
-        self.assertEqual("CLOUDINIT_2", source.metadata['local-hostname'])
+        self.assertEqual("CLOUDINIT_2", source.metadata["local-hostname"])
 
         # Test ssh keys
-        self.assertEqual(SSH_KEYS_1, source.metadata['public-keys'])
+        self.assertEqual(SSH_KEYS_1, source.metadata["public-keys"])
 
         # Test vendor data generation
         orig_val = self.maxDiff
@@ -309,7 +256,8 @@ class TestDataSourceVultr(CiTestCase):
         # Test vendor config
         self.assertEqual(
             EXPECTED_VULTR_CONFIG,
-            json.loads(vendordata[0].replace("#cloud-config", "")))
+            json.loads(vendordata[0].replace("#cloud-config", "")),
+        )
 
         self.maxDiff = orig_val
 
@@ -317,21 +265,24 @@ class TestDataSourceVultr(CiTestCase):
         self.assertEqual(EXPECTED_VULTR_NETWORK_2, source.network_config)
 
     # Test network config generation
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_network_config(self, mock_netmap):
         mock_netmap.return_value = INTERFACE_MAP
-        interf = VULTR_V1_1['interfaces']
+        interf = VULTR_V1_1["interfaces"]
 
-        self.assertEqual(EXPECTED_VULTR_NETWORK_1,
-                         vultr.generate_network_config(interf))
+        self.assertEqual(
+            EXPECTED_VULTR_NETWORK_1, vultr.generate_network_config(interf)
+        )
 
     # Test Private Networking config generation
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
     def test_private_network_config(self, mock_netmap):
         mock_netmap.return_value = INTERFACE_MAP
-        interf = VULTR_V1_2['interfaces']
+        interf = VULTR_V1_2["interfaces"]
+
+        self.assertEqual(
+            EXPECTED_VULTR_NETWORK_2, vultr.generate_network_config(interf)
+        )
 
-        self.assertEqual(EXPECTED_VULTR_NETWORK_2,
-                         vultr.generate_network_config(interf))
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/vmware/test_custom_script.py b/tests/unittests/sources/vmware/test_custom_script.py
index fcbb9cd5..9b3e079f 100644
--- a/tests/unittests/sources/vmware/test_custom_script.py
+++ b/tests/unittests/sources/vmware/test_custom_script.py
@@ -7,12 +7,13 @@
 
 import os
 import stat
+
 from cloudinit import util
 from cloudinit.sources.helpers.vmware.imc.config_custom_script import (
     CustomScriptConstant,
     CustomScriptNotFound,
-    PreCustomScript,
     PostCustomScript,
+    PreCustomScript,
 )
 from tests.unittests.helpers import CiTestCase, mock
 
@@ -22,8 +23,7 @@ class TestVmwareCustomScript(CiTestCase):
         self.tmpDir = self.tmp_dir()
         # Mock the tmpDir as the root dir in VM.
         self.execDir = os.path.join(self.tmpDir, ".customization")
-        self.execScript = os.path.join(self.execDir,
-                                       ".customize.sh")
+        self.execScript = os.path.join(self.execDir, ".customize.sh")
 
     def test_prepare_custom_script(self):
         """
@@ -36,23 +36,24 @@ class TestVmwareCustomScript(CiTestCase):
         preCust = PreCustomScript("random-vmw-test", self.tmpDir)
         self.assertEqual("random-vmw-test", preCust.scriptname)
         self.assertEqual(self.tmpDir, preCust.directory)
-        self.assertEqual(self.tmp_path("random-vmw-test", self.tmpDir),
-                         preCust.scriptpath)
+        self.assertEqual(
+            self.tmp_path("random-vmw-test", self.tmpDir), preCust.scriptpath
+        )
         with self.assertRaises(CustomScriptNotFound):
             preCust.prepare_script()
 
         # Custom script exists.
         custScript = self.tmp_path("test-cust", self.tmpDir)
         util.write_file(custScript, "test-CR-strip\r\r")
-        with mock.patch.object(CustomScriptConstant,
-                               "CUSTOM_TMP_DIR",
-                               self.execDir):
-            with mock.patch.object(CustomScriptConstant,
-                                   "CUSTOM_SCRIPT",
-                                   self.execScript):
-                postCust = PostCustomScript("test-cust",
-                                            self.tmpDir,
-                                            self.tmpDir)
+        with mock.patch.object(
+            CustomScriptConstant, "CUSTOM_TMP_DIR", self.execDir
+        ):
+            with mock.patch.object(
+                CustomScriptConstant, "CUSTOM_SCRIPT", self.execScript
+            ):
+                postCust = PostCustomScript(
+                    "test-cust", self.tmpDir, self.tmpDir
+                )
                 self.assertEqual("test-cust", postCust.scriptname)
                 self.assertEqual(self.tmpDir, postCust.directory)
                 self.assertEqual(custScript, postCust.scriptpath)
@@ -84,26 +85,30 @@ class TestVmwareCustomScript(CiTestCase):
         ccScriptDir = self.tmp_dir()
         ccScript = os.path.join(ccScriptDir, "post-customize-guest.sh")
         markerFile = os.path.join(self.tmpDir, ".markerFile")
-        with mock.patch.object(CustomScriptConstant,
-                               "CUSTOM_TMP_DIR",
-                               self.execDir):
-            with mock.patch.object(CustomScriptConstant,
-                                   "CUSTOM_SCRIPT",
-                                   self.execScript):
-                with mock.patch.object(CustomScriptConstant,
-                                       "POST_CUSTOM_PENDING_MARKER",
-                                       markerFile):
-                    postCust = PostCustomScript("test-cust",
-                                                self.tmpDir,
-                                                ccScriptDir)
+        with mock.patch.object(
+            CustomScriptConstant, "CUSTOM_TMP_DIR", self.execDir
+        ):
+            with mock.patch.object(
+                CustomScriptConstant, "CUSTOM_SCRIPT", self.execScript
+            ):
+                with mock.patch.object(
+                    CustomScriptConstant,
+                    "POST_CUSTOM_PENDING_MARKER",
+                    markerFile,
+                ):
+                    postCust = PostCustomScript(
+                        "test-cust", self.tmpDir, ccScriptDir
+                    )
                     postCust.execute()
                     # Check cc_scripts_per_instance and marker file
                     # are created.
                     self.assertTrue(os.path.exists(ccScript))
                     with open(ccScript, "r") as f:
                         content = f.read()
-                    self.assertEqual(content,
-                                     "This is the script to run post cust")
+                    self.assertEqual(
+                        content, "This is the script to run post cust"
+                    )
                     self.assertTrue(os.path.exists(markerFile))
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/vmware/test_guestcust_util.py b/tests/unittests/sources/vmware/test_guestcust_util.py
index 9114f0b9..fc63bcae 100644
--- a/tests/unittests/sources/vmware/test_guestcust_util.py
+++ b/tests/unittests/sources/vmware/test_guestcust_util.py
@@ -21,78 +21,89 @@ class TestGuestCustUtil(CiTestCase):
         This test is designed to verify the behavior if vmware-toolbox-cmd
         is not installed.
         """
-        with mock.patch.object(subp, 'which', return_value=None):
+        with mock.patch.object(subp, "which", return_value=None):
             self.assertEqual(
-                get_tools_config('section', 'key', 'defaultVal'), 'defaultVal')
+                get_tools_config("section", "key", "defaultVal"), "defaultVal"
+            )
 
     def test_get_tools_config_internal_exception(self):
         """
         This test is designed to verify the behavior if internal exception
         is raised.
         """
-        with mock.patch.object(subp, 'which', return_value='/dummy/path'):
-            with mock.patch.object(subp, 'subp',
-                                   return_value=('key=value', b''),
-                                   side_effect=subp.ProcessExecutionError(
-                                       "subp failed", exit_code=99)):
+        with mock.patch.object(subp, "which", return_value="/dummy/path"):
+            with mock.patch.object(
+                subp,
+                "subp",
+                return_value=("key=value", b""),
+                side_effect=subp.ProcessExecutionError(
+                    "subp failed", exit_code=99
+                ),
+            ):
                 # verify return value is 'defaultVal', not 'value'.
                 self.assertEqual(
-                    get_tools_config('section', 'key', 'defaultVal'),
-                    'defaultVal')
+                    get_tools_config("section", "key", "defaultVal"),
+                    "defaultVal",
+                )
 
     def test_get_tools_config_normal(self):
         """
         This test is designed to verify the value could be parsed from
         key = value of the given [section]
         """
-        with mock.patch.object(subp, 'which', return_value='/dummy/path'):
+        with mock.patch.object(subp, "which", return_value="/dummy/path"):
             # value is not blank
-            with mock.patch.object(subp, 'subp',
-                                   return_value=('key =   value  ', b'')):
+            with mock.patch.object(
+                subp, "subp", return_value=("key =   value  ", b"")
+            ):
                 self.assertEqual(
-                    get_tools_config('section', 'key', 'defaultVal'),
-                    'value')
+                    get_tools_config("section", "key", "defaultVal"), "value"
+                )
             # value is blank
-            with mock.patch.object(subp, 'subp',
-                                   return_value=('key = ', b'')):
+            with mock.patch.object(subp, "subp", return_value=("key = ", b"")):
                 self.assertEqual(
-                    get_tools_config('section', 'key', 'defaultVal'),
-                    '')
+                    get_tools_config("section", "key", "defaultVal"), ""
+                )
             # value contains =
-            with mock.patch.object(subp, 'subp',
-                                   return_value=('key=Bar=Wark', b'')):
+            with mock.patch.object(
+                subp, "subp", return_value=("key=Bar=Wark", b"")
+            ):
                 self.assertEqual(
-                    get_tools_config('section', 'key', 'defaultVal'),
-                    'Bar=Wark')
+                    get_tools_config("section", "key", "defaultVal"),
+                    "Bar=Wark",
+                )
 
             # value contains specific characters
-            with mock.patch.object(subp, 'subp',
-                                   return_value=('[a] b.c_d=e-f', b'')):
+            with mock.patch.object(
+                subp, "subp", return_value=("[a] b.c_d=e-f", b"")
+            ):
                 self.assertEqual(
-                    get_tools_config('section', 'key', 'defaultVal'),
-                    'e-f')
+                    get_tools_config("section", "key", "defaultVal"), "e-f"
+                )
 
     def test_set_gc_status(self):
         """
         This test is designed to verify the behavior of set_gc_status
         """
         # config is None, return None
-        self.assertEqual(set_gc_status(None, 'Successful'), None)
+        self.assertEqual(set_gc_status(None, "Successful"), None)
 
         # post gc status is NO, return None
         cf = ConfigFile("tests/data/vmware/cust-dhcp-2nic.cfg")
         conf = Config(cf)
-        self.assertEqual(set_gc_status(conf, 'Successful'), None)
+        self.assertEqual(set_gc_status(conf, "Successful"), None)
 
         # post gc status is YES, subp is called to execute command
         cf._insertKey("MISC|POST-GC-STATUS", "YES")
         conf = Config(cf)
-        with mock.patch.object(subp, 'subp',
-                               return_value=('ok', b'')) as mockobj:
-            self.assertEqual(
-                set_gc_status(conf, 'Successful'), ('ok', b''))
+        with mock.patch.object(
+            subp, "subp", return_value=("ok", b"")
+        ) as mockobj:
+            self.assertEqual(set_gc_status(conf, "Successful"), ("ok", b""))
             mockobj.assert_called_once_with(
-                ['vmware-rpctool', 'info-set guestinfo.gc.status Successful'],
-                rcs=[0])
+                ["vmware-rpctool", "info-set guestinfo.gc.status Successful"],
+                rcs=[0],
+            )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/sources/vmware/test_vmware_config_file.py b/tests/unittests/sources/vmware/test_vmware_config_file.py
index 1d66ab4a..38d45d0e 100644
--- a/tests/unittests/sources/vmware/test_vmware_config_file.py
+++ b/tests/unittests/sources/vmware/test_vmware_config_file.py
@@ -12,15 +12,19 @@ import sys
 import tempfile
 import textwrap
 
-from cloudinit.sources.DataSourceOVF import get_network_config_from_conf
-from cloudinit.sources.DataSourceOVF import read_vmware_imc
+from cloudinit.sources.DataSourceOVF import (
+    get_network_config_from_conf,
+    read_vmware_imc,
+)
 from cloudinit.sources.helpers.vmware.imc.boot_proto import BootProtoEnum
 from cloudinit.sources.helpers.vmware.imc.config import Config
 from cloudinit.sources.helpers.vmware.imc.config_file import (
     ConfigFile as WrappedConfigFile,
 )
-from cloudinit.sources.helpers.vmware.imc.config_nic import gen_subnet
-from cloudinit.sources.helpers.vmware.imc.config_nic import NicConfigurator
+from cloudinit.sources.helpers.vmware.imc.config_nic import (
+    NicConfigurator,
+    gen_subnet,
+)
 from tests.unittests.helpers import CiTestCase, cloud_init_project_dir
 
 logging.basicConfig(level=logging.DEBUG, stream=sys.stdout)
@@ -32,7 +36,6 @@ def ConfigFile(path: str):
 
 
 class TestVmwareConfigFile(CiTestCase):
-
     def test_utility_methods(self):
         """Tests basic utility methods of ConfigFile class"""
         cf = ConfigFile("tests/data/vmware/cust-dhcp-2nic.cfg")
@@ -45,12 +48,14 @@ class TestVmwareConfigFile(CiTestCase):
         cf._insertKey("BAR", "   ")
 
         self.assertEqual(2, len(cf), "insert size")
-        self.assertEqual('foo', cf["PASSWORD|-PASS"], "password")
+        self.assertEqual("foo", cf["PASSWORD|-PASS"], "password")
         self.assertTrue("PASSWORD|-PASS" in cf, "hasPassword")
-        self.assertFalse(cf.should_keep_current_value("PASSWORD|-PASS"),
-                         "keepPassword")
-        self.assertFalse(cf.should_remove_current_value("PASSWORD|-PASS"),
-                         "removePassword")
+        self.assertFalse(
+            cf.should_keep_current_value("PASSWORD|-PASS"), "keepPassword"
+        )
+        self.assertFalse(
+            cf.should_remove_current_value("PASSWORD|-PASS"), "removePassword"
+        )
         self.assertFalse("FOO" in cf, "hasFoo")
         self.assertTrue(cf.should_keep_current_value("FOO"), "keepFoo")
         self.assertFalse(cf.should_remove_current_value("FOO"), "removeFoo")
@@ -62,17 +67,17 @@ class TestVmwareConfigFile(CiTestCase):
         """Tests instance id for the DatasourceOVF"""
         cf = ConfigFile("tests/data/vmware/cust-dhcp-2nic.cfg")
 
-        instance_id_prefix = 'iid-vmware-'
+        instance_id_prefix = "iid-vmware-"
 
         conf = Config(cf)
 
         (md1, _, _) = read_vmware_imc(conf)
         self.assertIn(instance_id_prefix, md1["instance-id"])
-        self.assertEqual(md1["instance-id"], 'iid-vmware-imc')
+        self.assertEqual(md1["instance-id"], "iid-vmware-imc")
 
         (md2, _, _) = read_vmware_imc(conf)
         self.assertIn(instance_id_prefix, md2["instance-id"])
-        self.assertEqual(md2["instance-id"], 'iid-vmware-imc')
+        self.assertEqual(md2["instance-id"], "iid-vmware-imc")
 
         self.assertEqual(md2["instance-id"], md1["instance-id"])
 
@@ -82,36 +87,38 @@ class TestVmwareConfigFile(CiTestCase):
 
         conf = Config(cf)
 
-        self.assertEqual('myhost1', conf.host_name, "hostName")
-        self.assertEqual('Africa/Abidjan', conf.timezone, "tz")
+        self.assertEqual("myhost1", conf.host_name, "hostName")
+        self.assertEqual("Africa/Abidjan", conf.timezone, "tz")
         self.assertTrue(conf.utc, "utc")
 
-        self.assertEqual(['10.20.145.1', '10.20.145.2'],
-                         conf.name_servers,
-                         "dns")
-        self.assertEqual(['eng.vmware.com', 'proxy.vmware.com'],
-                         conf.dns_suffixes,
-                         "suffixes")
+        self.assertEqual(
+            ["10.20.145.1", "10.20.145.2"], conf.name_servers, "dns"
+        )
+        self.assertEqual(
+            ["eng.vmware.com", "proxy.vmware.com"],
+            conf.dns_suffixes,
+            "suffixes",
+        )
 
         nics = conf.nics
         ipv40 = nics[0].staticIpv4
 
         self.assertEqual(2, len(nics), "nics")
-        self.assertEqual('NIC1', nics[0].name, "nic0")
-        self.assertEqual('00:50:56:a6:8c:08', nics[0].mac, "mac0")
+        self.assertEqual("NIC1", nics[0].name, "nic0")
+        self.assertEqual("00:50:56:a6:8c:08", nics[0].mac, "mac0")
         self.assertEqual(BootProtoEnum.STATIC, nics[0].bootProto, "bootproto0")
-        self.assertEqual('10.20.87.154', ipv40[0].ip, "ipv4Addr0")
-        self.assertEqual('255.255.252.0', ipv40[0].netmask, "ipv4Mask0")
+        self.assertEqual("10.20.87.154", ipv40[0].ip, "ipv4Addr0")
+        self.assertEqual("255.255.252.0", ipv40[0].netmask, "ipv4Mask0")
         self.assertEqual(2, len(ipv40[0].gateways), "ipv4Gw0")
-        self.assertEqual('10.20.87.253', ipv40[0].gateways[0], "ipv4Gw0_0")
-        self.assertEqual('10.20.87.105', ipv40[0].gateways[1], "ipv4Gw0_1")
+        self.assertEqual("10.20.87.253", ipv40[0].gateways[0], "ipv4Gw0_0")
+        self.assertEqual("10.20.87.105", ipv40[0].gateways[1], "ipv4Gw0_1")
 
         self.assertEqual(1, len(nics[0].staticIpv6), "ipv6Cnt0")
-        self.assertEqual('fc00:10:20:87::154',
-                         nics[0].staticIpv6[0].ip,
-                         "ipv6Addr0")
+        self.assertEqual(
+            "fc00:10:20:87::154", nics[0].staticIpv6[0].ip, "ipv6Addr0"
+        )
 
-        self.assertEqual('NIC2', nics[1].name, "nic1")
+        self.assertEqual("NIC2", nics[1].name, "nic1")
         self.assertTrue(not nics[1].staticIpv6, "ipv61 dhcp")
 
     def test_config_file_dhcp_2nics(self):
@@ -121,8 +128,8 @@ class TestVmwareConfigFile(CiTestCase):
         conf = Config(cf)
         nics = conf.nics
         self.assertEqual(2, len(nics), "nics")
-        self.assertEqual('NIC1', nics[0].name, "nic0")
-        self.assertEqual('00:50:56:a6:8c:08', nics[0].mac, "mac0")
+        self.assertEqual("NIC1", nics[0].name, "nic0")
+        self.assertEqual("00:50:56:a6:8c:08", nics[0].mac, "mac0")
         self.assertEqual(BootProtoEnum.DHCP, nics[0].bootProto, "bootproto0")
 
     def test_config_password(self):
@@ -132,7 +139,7 @@ class TestVmwareConfigFile(CiTestCase):
         cf._insertKey("PASSWORD|RESET", "no")
 
         conf = Config(cf)
-        self.assertEqual('test-password', conf.admin_password, "password")
+        self.assertEqual("test-password", conf.admin_password, "password")
         self.assertFalse(conf.reset_password, "do not reset password")
 
     def test_config_reset_passwd(self):
@@ -161,67 +168,66 @@ class TestVmwareConfigFile(CiTestCase):
 
         network_config = get_network_config_from_conf(config, False)
 
-        self.assertEqual(1, network_config.get('version'))
+        self.assertEqual(1, network_config.get("version"))
 
-        config_types = network_config.get('config')
+        config_types = network_config.get("config")
         name_servers = None
         dns_suffixes = None
 
         for type in config_types:
-            if type.get('type') == 'nameserver':
-                name_servers = type.get('address')
-                dns_suffixes = type.get('search')
+            if type.get("type") == "nameserver":
+                name_servers = type.get("address")
+                dns_suffixes = type.get("search")
                 break
 
-        self.assertEqual(['10.20.145.1', '10.20.145.2'],
-                         name_servers,
-                         "dns")
-        self.assertEqual(['eng.vmware.com', 'proxy.vmware.com'],
-                         dns_suffixes,
-                         "suffixes")
+        self.assertEqual(["10.20.145.1", "10.20.145.2"], name_servers, "dns")
+        self.assertEqual(
+            ["eng.vmware.com", "proxy.vmware.com"], dns_suffixes, "suffixes"
+        )
 
     def test_gen_subnet(self):
         """Tests if gen_subnet properly calculates network subnet from
-           IPv4 address and netmask"""
-        ip_subnet_list = [['10.20.87.253', '255.255.252.0', '10.20.84.0'],
-                          ['10.20.92.105', '255.255.252.0', '10.20.92.0'],
-                          ['192.168.0.10', '255.255.0.0', '192.168.0.0']]
+        IPv4 address and netmask"""
+        ip_subnet_list = [
+            ["10.20.87.253", "255.255.252.0", "10.20.84.0"],
+            ["10.20.92.105", "255.255.252.0", "10.20.92.0"],
+            ["192.168.0.10", "255.255.0.0", "192.168.0.0"],
+        ]
         for entry in ip_subnet_list:
-            self.assertEqual(entry[2], gen_subnet(entry[0], entry[1]),
-                             "Subnet for a specified ip and netmask")
+            self.assertEqual(
+                entry[2],
+                gen_subnet(entry[0], entry[1]),
+                "Subnet for a specified ip and netmask",
+            )
 
     def test_get_config_dns_suffixes(self):
         """Tests if get_network_config_from_conf properly
-           generates nameservers and dns settings from a
-           specified configuration"""
+        generates nameservers and dns settings from a
+        specified configuration"""
         cf = ConfigFile("tests/data/vmware/cust-dhcp-2nic.cfg")
 
         config = Config(cf)
 
         network_config = get_network_config_from_conf(config, False)
 
-        self.assertEqual(1, network_config.get('version'))
+        self.assertEqual(1, network_config.get("version"))
 
-        config_types = network_config.get('config')
+        config_types = network_config.get("config")
         name_servers = None
         dns_suffixes = None
 
         for type in config_types:
-            if type.get('type') == 'nameserver':
-                name_servers = type.get('address')
-                dns_suffixes = type.get('search')
+            if type.get("type") == "nameserver":
+                name_servers = type.get("address")
+                dns_suffixes = type.get("search")
                 break
 
-        self.assertEqual([],
-                         name_servers,
-                         "dns")
-        self.assertEqual(['eng.vmware.com'],
-                         dns_suffixes,
-                         "suffixes")
+        self.assertEqual([], name_servers, "dns")
+        self.assertEqual(["eng.vmware.com"], dns_suffixes, "suffixes")
 
     def test_get_nics_list_dhcp(self):
         """Tests if NicConfigurator properly calculates network subnets
-           for a configuration with a list of DHCP NICs"""
+        for a configuration with a list of DHCP NICs"""
         cf = ConfigFile("tests/data/vmware/cust-dhcp-2nic.cfg")
 
         config = Config(cf)
@@ -231,37 +237,39 @@ class TestVmwareConfigFile(CiTestCase):
 
         self.assertEqual(2, len(nics_cfg_list), "number of config elements")
 
-        nic1 = {'name': 'NIC1'}
-        nic2 = {'name': 'NIC2'}
+        nic1 = {"name": "NIC1"}
+        nic2 = {"name": "NIC2"}
         for cfg in nics_cfg_list:
-            if cfg.get('name') == nic1.get('name'):
+            if cfg.get("name") == nic1.get("name"):
                 nic1.update(cfg)
-            elif cfg.get('name') == nic2.get('name'):
+            elif cfg.get("name") == nic2.get("name"):
                 nic2.update(cfg)
 
-        self.assertEqual('physical', nic1.get('type'), 'type of NIC1')
-        self.assertEqual('NIC1', nic1.get('name'), 'name of NIC1')
-        self.assertEqual('00:50:56:a6:8c:08', nic1.get('mac_address'),
-                         'mac address of NIC1')
-        subnets = nic1.get('subnets')
-        self.assertEqual(1, len(subnets), 'number of subnets for NIC1')
+        self.assertEqual("physical", nic1.get("type"), "type of NIC1")
+        self.assertEqual("NIC1", nic1.get("name"), "name of NIC1")
+        self.assertEqual(
+            "00:50:56:a6:8c:08", nic1.get("mac_address"), "mac address of NIC1"
+        )
+        subnets = nic1.get("subnets")
+        self.assertEqual(1, len(subnets), "number of subnets for NIC1")
         subnet = subnets[0]
-        self.assertEqual('dhcp', subnet.get('type'), 'DHCP type for NIC1')
-        self.assertEqual('auto', subnet.get('control'), 'NIC1 Control type')
-
-        self.assertEqual('physical', nic2.get('type'), 'type of NIC2')
-        self.assertEqual('NIC2', nic2.get('name'), 'name of NIC2')
-        self.assertEqual('00:50:56:a6:5a:de', nic2.get('mac_address'),
-                         'mac address of NIC2')
-        subnets = nic2.get('subnets')
-        self.assertEqual(1, len(subnets), 'number of subnets for NIC2')
+        self.assertEqual("dhcp", subnet.get("type"), "DHCP type for NIC1")
+        self.assertEqual("auto", subnet.get("control"), "NIC1 Control type")
+
+        self.assertEqual("physical", nic2.get("type"), "type of NIC2")
+        self.assertEqual("NIC2", nic2.get("name"), "name of NIC2")
+        self.assertEqual(
+            "00:50:56:a6:5a:de", nic2.get("mac_address"), "mac address of NIC2"
+        )
+        subnets = nic2.get("subnets")
+        self.assertEqual(1, len(subnets), "number of subnets for NIC2")
         subnet = subnets[0]
-        self.assertEqual('dhcp', subnet.get('type'), 'DHCP type for NIC2')
-        self.assertEqual('auto', subnet.get('control'), 'NIC2 Control type')
+        self.assertEqual("dhcp", subnet.get("type"), "DHCP type for NIC2")
+        self.assertEqual("auto", subnet.get("control"), "NIC2 Control type")
 
     def test_get_nics_list_static(self):
         """Tests if NicConfigurator properly calculates network subnets
-           for a configuration with 2 static NICs"""
+        for a configuration with 2 static NICs"""
         cf = ConfigFile("tests/data/vmware/cust-static-2nic.cfg")
 
         config = Config(cf)
@@ -271,80 +279,93 @@ class TestVmwareConfigFile(CiTestCase):
 
         self.assertEqual(2, len(nics_cfg_list), "number of elements")
 
-        nic1 = {'name': 'NIC1'}
-        nic2 = {'name': 'NIC2'}
+        nic1 = {"name": "NIC1"}
+        nic2 = {"name": "NIC2"}
         route_list = []
         for cfg in nics_cfg_list:
-            cfg_type = cfg.get('type')
-            if cfg_type == 'physical':
-                if cfg.get('name') == nic1.get('name'):
+            cfg_type = cfg.get("type")
+            if cfg_type == "physical":
+                if cfg.get("name") == nic1.get("name"):
                     nic1.update(cfg)
-                elif cfg.get('name') == nic2.get('name'):
+                elif cfg.get("name") == nic2.get("name"):
                     nic2.update(cfg)
 
-        self.assertEqual('physical', nic1.get('type'), 'type of NIC1')
-        self.assertEqual('NIC1', nic1.get('name'), 'name of NIC1')
-        self.assertEqual('00:50:56:a6:8c:08', nic1.get('mac_address'),
-                         'mac address of NIC1')
+        self.assertEqual("physical", nic1.get("type"), "type of NIC1")
+        self.assertEqual("NIC1", nic1.get("name"), "name of NIC1")
+        self.assertEqual(
+            "00:50:56:a6:8c:08", nic1.get("mac_address"), "mac address of NIC1"
+        )
 
-        subnets = nic1.get('subnets')
-        self.assertEqual(2, len(subnets), 'Number of subnets')
+        subnets = nic1.get("subnets")
+        self.assertEqual(2, len(subnets), "Number of subnets")
 
         static_subnet = []
         static6_subnet = []
 
         for subnet in subnets:
-            subnet_type = subnet.get('type')
-            if subnet_type == 'static':
+            subnet_type = subnet.get("type")
+            if subnet_type == "static":
                 static_subnet.append(subnet)
-            elif subnet_type == 'static6':
+            elif subnet_type == "static6":
                 static6_subnet.append(subnet)
             else:
-                self.assertEqual(True, False, 'Unknown type')
-            if 'route' in subnet:
-                for route in subnet.get('routes'):
+                self.assertEqual(True, False, "Unknown type")
+            if "route" in subnet:
+                for route in subnet.get("routes"):
                     route_list.append(route)
 
-        self.assertEqual(1, len(static_subnet), 'Number of static subnet')
-        self.assertEqual(1, len(static6_subnet), 'Number of static6 subnet')
+        self.assertEqual(1, len(static_subnet), "Number of static subnet")
+        self.assertEqual(1, len(static6_subnet), "Number of static6 subnet")
 
         subnet = static_subnet[0]
-        self.assertEqual('10.20.87.154', subnet.get('address'),
-                         'IPv4 address of static subnet')
-        self.assertEqual('255.255.252.0', subnet.get('netmask'),
-                         'NetMask of static subnet')
-        self.assertEqual('auto', subnet.get('control'),
-                         'control for static subnet')
+        self.assertEqual(
+            "10.20.87.154",
+            subnet.get("address"),
+            "IPv4 address of static subnet",
+        )
+        self.assertEqual(
+            "255.255.252.0", subnet.get("netmask"), "NetMask of static subnet"
+        )
+        self.assertEqual(
+            "auto", subnet.get("control"), "control for static subnet"
+        )
 
         subnet = static6_subnet[0]
-        self.assertEqual('fc00:10:20:87::154', subnet.get('address'),
-                         'IPv6 address of static subnet')
-        self.assertEqual('64', subnet.get('netmask'),
-                         'NetMask of static6 subnet')
+        self.assertEqual(
+            "fc00:10:20:87::154",
+            subnet.get("address"),
+            "IPv6 address of static subnet",
+        )
+        self.assertEqual(
+            "64", subnet.get("netmask"), "NetMask of static6 subnet"
+        )
 
-        route_set = set(['10.20.87.253', '10.20.87.105', '192.168.0.10'])
+        route_set = set(["10.20.87.253", "10.20.87.105", "192.168.0.10"])
         for route in route_list:
-            self.assertEqual(10000, route.get('metric'), 'metric of route')
-            gateway = route.get('gateway')
+            self.assertEqual(10000, route.get("metric"), "metric of route")
+            gateway = route.get("gateway")
             if gateway in route_set:
                 route_set.discard(gateway)
             else:
-                self.assertEqual(True, False, 'invalid gateway %s' % (gateway))
+                self.assertEqual(True, False, "invalid gateway %s" % (gateway))
 
-        self.assertEqual('physical', nic2.get('type'), 'type of NIC2')
-        self.assertEqual('NIC2', nic2.get('name'), 'name of NIC2')
-        self.assertEqual('00:50:56:a6:ef:7d', nic2.get('mac_address'),
-                         'mac address of NIC2')
+        self.assertEqual("physical", nic2.get("type"), "type of NIC2")
+        self.assertEqual("NIC2", nic2.get("name"), "name of NIC2")
+        self.assertEqual(
+            "00:50:56:a6:ef:7d", nic2.get("mac_address"), "mac address of NIC2"
+        )
 
-        subnets = nic2.get('subnets')
-        self.assertEqual(1, len(subnets), 'Number of subnets for NIC2')
+        subnets = nic2.get("subnets")
+        self.assertEqual(1, len(subnets), "Number of subnets for NIC2")
 
         subnet = subnets[0]
-        self.assertEqual('static', subnet.get('type'), 'Subnet type')
-        self.assertEqual('192.168.6.102', subnet.get('address'),
-                         'Subnet address')
-        self.assertEqual('255.255.0.0', subnet.get('netmask'),
-                         'Subnet netmask')
+        self.assertEqual("static", subnet.get("type"), "Subnet type")
+        self.assertEqual(
+            "192.168.6.102", subnet.get("address"), "Subnet address"
+        )
+        self.assertEqual(
+            "255.255.0.0", subnet.get("netmask"), "Subnet netmask"
+        )
 
     def test_custom_script(self):
         cf = ConfigFile("tests/data/vmware/cust-dhcp-2nic.cfg")
@@ -385,8 +406,9 @@ class TestVmwareNetConfig(CiTestCase):
     def _get_NicConfigurator(self, text):
         fp = None
         try:
-            with tempfile.NamedTemporaryFile(mode="w", dir=self.tmp_dir(),
-                                             delete=False) as fp:
+            with tempfile.NamedTemporaryFile(
+                mode="w", dir=self.tmp_dir(), delete=False
+            ) as fp:
                 fp.write(text)
                 fp.close()
             cfg = Config(ConfigFile(fp.name))
@@ -397,7 +419,8 @@ class TestVmwareNetConfig(CiTestCase):
 
     def test_non_primary_nic_without_gateway(self):
         """A non primary nic set is not required to have a gateway."""
-        config = textwrap.dedent("""\
+        config = textwrap.dedent(
+            """\
             [NETWORK]
             NETWORKING = yes
             BOOTPROTO = dhcp
@@ -414,19 +437,32 @@ class TestVmwareNetConfig(CiTestCase):
             BOOTPROTO = static
             IPADDR = 10.20.87.154
             NETMASK = 255.255.252.0
-            """)
+            """
+        )
         nc = self._get_NicConfigurator(config)
         self.assertEqual(
-            [{'type': 'physical', 'name': 'NIC1',
-              'mac_address': '00:50:56:a6:8c:08',
-              'subnets': [
-                  {'control': 'auto', 'type': 'static',
-                   'address': '10.20.87.154', 'netmask': '255.255.252.0'}]}],
-            nc.generate())
+            [
+                {
+                    "type": "physical",
+                    "name": "NIC1",
+                    "mac_address": "00:50:56:a6:8c:08",
+                    "subnets": [
+                        {
+                            "control": "auto",
+                            "type": "static",
+                            "address": "10.20.87.154",
+                            "netmask": "255.255.252.0",
+                        }
+                    ],
+                }
+            ],
+            nc.generate(),
+        )
 
     def test_non_primary_nic_with_gateway(self):
         """A non primary nic set can have a gateway."""
-        config = textwrap.dedent("""\
+        config = textwrap.dedent(
+            """\
             [NETWORK]
             NETWORKING = yes
             BOOTPROTO = dhcp
@@ -444,22 +480,40 @@ class TestVmwareNetConfig(CiTestCase):
             IPADDR = 10.20.87.154
             NETMASK = 255.255.252.0
             GATEWAY = 10.20.87.253
-            """)
+            """
+        )
         nc = self._get_NicConfigurator(config)
         self.assertEqual(
-            [{'type': 'physical', 'name': 'NIC1',
-              'mac_address': '00:50:56:a6:8c:08',
-              'subnets': [
-                  {'control': 'auto', 'type': 'static',
-                   'address': '10.20.87.154', 'netmask': '255.255.252.0',
-                   'routes':
-                       [{'type': 'route', 'destination': '10.20.84.0/22',
-                         'gateway': '10.20.87.253', 'metric': 10000}]}]}],
-            nc.generate())
+            [
+                {
+                    "type": "physical",
+                    "name": "NIC1",
+                    "mac_address": "00:50:56:a6:8c:08",
+                    "subnets": [
+                        {
+                            "control": "auto",
+                            "type": "static",
+                            "address": "10.20.87.154",
+                            "netmask": "255.255.252.0",
+                            "routes": [
+                                {
+                                    "type": "route",
+                                    "destination": "10.20.84.0/22",
+                                    "gateway": "10.20.87.253",
+                                    "metric": 10000,
+                                }
+                            ],
+                        }
+                    ],
+                }
+            ],
+            nc.generate(),
+        )
 
     def test_cust_non_primary_nic_with_gateway_(self):
         """A customer non primary nic set can have a gateway."""
-        config = textwrap.dedent("""\
+        config = textwrap.dedent(
+            """\
             [NETWORK]
             NETWORKING = yes
             BOOTPROTO = dhcp
@@ -486,22 +540,40 @@ class TestVmwareNetConfig(CiTestCase):
 
             [DATETIME]
             UTC = yes
-            """)
+            """
+        )
         nc = self._get_NicConfigurator(config)
         self.assertEqual(
-            [{'type': 'physical', 'name': 'NIC1',
-              'mac_address': '00:50:56:ac:d1:8a',
-              'subnets': [
-                  {'control': 'auto', 'type': 'static',
-                   'address': '100.115.223.75', 'netmask': '255.255.255.0',
-                   'routes':
-                       [{'type': 'route', 'destination': '100.115.223.0/24',
-                         'gateway': '100.115.223.254', 'metric': 10000}]}]}],
-            nc.generate())
+            [
+                {
+                    "type": "physical",
+                    "name": "NIC1",
+                    "mac_address": "00:50:56:ac:d1:8a",
+                    "subnets": [
+                        {
+                            "control": "auto",
+                            "type": "static",
+                            "address": "100.115.223.75",
+                            "netmask": "255.255.255.0",
+                            "routes": [
+                                {
+                                    "type": "route",
+                                    "destination": "100.115.223.0/24",
+                                    "gateway": "100.115.223.254",
+                                    "metric": 10000,
+                                }
+                            ],
+                        }
+                    ],
+                }
+            ],
+            nc.generate(),
+        )
 
     def test_a_primary_nic_with_gateway(self):
         """A primary nic set can have a gateway."""
-        config = textwrap.dedent("""\
+        config = textwrap.dedent(
+            """\
             [NETWORK]
             NETWORKING = yes
             BOOTPROTO = dhcp
@@ -520,16 +592,28 @@ class TestVmwareNetConfig(CiTestCase):
             NETMASK = 255.255.252.0
             PRIMARY = true
             GATEWAY = 10.20.87.253
-            """)
+            """
+        )
         nc = self._get_NicConfigurator(config)
         self.assertEqual(
-            [{'type': 'physical', 'name': 'NIC1',
-              'mac_address': '00:50:56:a6:8c:08',
-              'subnets': [
-                  {'control': 'auto', 'type': 'static',
-                   'address': '10.20.87.154', 'netmask': '255.255.252.0',
-                   'gateway': '10.20.87.253'}]}],
-            nc.generate())
+            [
+                {
+                    "type": "physical",
+                    "name": "NIC1",
+                    "mac_address": "00:50:56:a6:8c:08",
+                    "subnets": [
+                        {
+                            "control": "auto",
+                            "type": "static",
+                            "address": "10.20.87.154",
+                            "netmask": "255.255.252.0",
+                            "gateway": "10.20.87.253",
+                        }
+                    ],
+                }
+            ],
+            nc.generate(),
+        )
 
     def test_meta_data(self):
         cf = ConfigFile("tests/data/vmware/cust-dhcp-2nic.cfg")
diff --git a/tests/unittests/test__init__.py b/tests/unittests/test__init__.py
index 4382a078..0ed8a120 100644
--- a/tests/unittests/test__init__.py
+++ b/tests/unittests/test__init__.py
@@ -5,14 +5,9 @@ import os
 import shutil
 import tempfile
 
+from cloudinit import handlers, helpers, settings, url_helper, util
 from cloudinit.cmd import main
-from cloudinit import handlers
-from cloudinit import helpers
-from cloudinit import settings
-from cloudinit import url_helper
-from cloudinit import util
-
-from tests.unittests.helpers import TestCase, CiTestCase, ExitStack, mock
+from tests.unittests.helpers import CiTestCase, ExitStack, TestCase, mock
 
 
 class FakeModule(handlers.Handler):
@@ -28,7 +23,6 @@ class FakeModule(handlers.Handler):
 
 
 class TestWalkerHandleHandler(TestCase):
-
     def setUp(self):
         super(TestWalkerHandleHandler, self).setUp()
         tmpdir = tempfile.mkdtemp()
@@ -39,13 +33,16 @@ class TestWalkerHandleHandler(TestCase):
             "frequency": "",
             "handlerdir": tmpdir,
             "handlers": helpers.ContentHandlers(),
-            "data": None}
+            "data": None,
+        }
 
         self.expected_module_name = "part-handler-%03d" % (
-            self.data["handlercount"],)
+            self.data["handlercount"],
+        )
         expected_file_name = "%s.py" % self.expected_module_name
         self.expected_file_fullname = os.path.join(
-            self.data["handlerdir"], expected_file_name)
+            self.data["handlerdir"], expected_file_name
+        )
         self.module_fake = FakeModule()
         self.ctype = None
         self.filename = None
@@ -56,45 +53,55 @@ class TestWalkerHandleHandler(TestCase):
         resources = ExitStack()
         self.addCleanup(resources.close)
         self.write_file_mock = resources.enter_context(
-            mock.patch('cloudinit.util.write_file'))
+            mock.patch("cloudinit.util.write_file")
+        )
 
     def test_no_errors(self):
         """Payload gets written to file and added to C{pdata}."""
-        with mock.patch('cloudinit.importer.import_module',
-                        return_value=self.module_fake) as mockobj:
-            handlers.walker_handle_handler(self.data, self.ctype,
-                                           self.filename, self.payload)
+        with mock.patch(
+            "cloudinit.importer.import_module", return_value=self.module_fake
+        ) as mockobj:
+            handlers.walker_handle_handler(
+                self.data, self.ctype, self.filename, self.payload
+            )
             mockobj.assert_called_once_with(self.expected_module_name)
         self.write_file_mock.assert_called_once_with(
-            self.expected_file_fullname, self.payload, 0o600)
-        self.assertEqual(self.data['handlercount'], 1)
+            self.expected_file_fullname, self.payload, 0o600
+        )
+        self.assertEqual(self.data["handlercount"], 1)
 
     def test_import_error(self):
         """Module import errors are logged. No handler added to C{pdata}."""
-        with mock.patch('cloudinit.importer.import_module',
-                        side_effect=ImportError) as mockobj:
-            handlers.walker_handle_handler(self.data, self.ctype,
-                                           self.filename, self.payload)
+        with mock.patch(
+            "cloudinit.importer.import_module", side_effect=ImportError
+        ) as mockobj:
+            handlers.walker_handle_handler(
+                self.data, self.ctype, self.filename, self.payload
+            )
             mockobj.assert_called_once_with(self.expected_module_name)
         self.write_file_mock.assert_called_once_with(
-            self.expected_file_fullname, self.payload, 0o600)
-        self.assertEqual(self.data['handlercount'], 0)
+            self.expected_file_fullname, self.payload, 0o600
+        )
+        self.assertEqual(self.data["handlercount"], 0)
 
     def test_attribute_error(self):
         """Attribute errors are logged. No handler added to C{pdata}."""
-        with mock.patch('cloudinit.importer.import_module',
-                        side_effect=AttributeError,
-                        return_value=self.module_fake) as mockobj:
-            handlers.walker_handle_handler(self.data, self.ctype,
-                                           self.filename, self.payload)
+        with mock.patch(
+            "cloudinit.importer.import_module",
+            side_effect=AttributeError,
+            return_value=self.module_fake,
+        ) as mockobj:
+            handlers.walker_handle_handler(
+                self.data, self.ctype, self.filename, self.payload
+            )
             mockobj.assert_called_once_with(self.expected_module_name)
         self.write_file_mock.assert_called_once_with(
-            self.expected_file_fullname, self.payload, 0o600)
-        self.assertEqual(self.data['handlercount'], 0)
+            self.expected_file_fullname, self.payload, 0o600
+        )
+        self.assertEqual(self.data["handlercount"], 0)
 
 
 class TestHandlerHandlePart(TestCase):
-
     def setUp(self):
         super(TestHandlerHandlePart, self).setUp()
         self.data = "fake data"
@@ -103,7 +110,7 @@ class TestHandlerHandlePart(TestCase):
         self.payload = "fake payload"
         self.frequency = settings.PER_INSTANCE
         self.headers = {
-            'Content-Type': self.ctype,
+            "Content-Type": self.ctype,
         }
 
     def test_normal_version_1(self):
@@ -111,126 +118,172 @@ class TestHandlerHandlePart(TestCase):
         C{handle_part} is called without C{frequency} for
         C{handler_version} == 1.
         """
-        mod_mock = mock.Mock(frequency=settings.PER_INSTANCE,
-                             handler_version=1)
-        handlers.run_part(mod_mock, self.data, self.filename, self.payload,
-                          self.frequency, self.headers)
+        mod_mock = mock.Mock(
+            frequency=settings.PER_INSTANCE, handler_version=1
+        )
+        handlers.run_part(
+            mod_mock,
+            self.data,
+            self.filename,
+            self.payload,
+            self.frequency,
+            self.headers,
+        )
         # Assert that the handle_part() method of the mock object got
         # called with the expected arguments.
         mod_mock.handle_part.assert_called_once_with(
-            self.data, self.ctype, self.filename, self.payload)
+            self.data, self.ctype, self.filename, self.payload
+        )
 
     def test_normal_version_2(self):
         """
         C{handle_part} is called with C{frequency} for
         C{handler_version} == 2.
         """
-        mod_mock = mock.Mock(frequency=settings.PER_INSTANCE,
-                             handler_version=2)
-        handlers.run_part(mod_mock, self.data, self.filename, self.payload,
-                          self.frequency, self.headers)
+        mod_mock = mock.Mock(
+            frequency=settings.PER_INSTANCE, handler_version=2
+        )
+        handlers.run_part(
+            mod_mock,
+            self.data,
+            self.filename,
+            self.payload,
+            self.frequency,
+            self.headers,
+        )
         # Assert that the handle_part() method of the mock object got
         # called with the expected arguments.
         mod_mock.handle_part.assert_called_once_with(
-            self.data, self.ctype, self.filename, self.payload,
-            settings.PER_INSTANCE)
+            self.data,
+            self.ctype,
+            self.filename,
+            self.payload,
+            settings.PER_INSTANCE,
+        )
 
     def test_modfreq_per_always(self):
         """
         C{handle_part} is called regardless of frequency if nofreq is always.
         """
         self.frequency = "once"
-        mod_mock = mock.Mock(frequency=settings.PER_ALWAYS,
-                             handler_version=1)
-        handlers.run_part(mod_mock, self.data, self.filename, self.payload,
-                          self.frequency, self.headers)
+        mod_mock = mock.Mock(frequency=settings.PER_ALWAYS, handler_version=1)
+        handlers.run_part(
+            mod_mock,
+            self.data,
+            self.filename,
+            self.payload,
+            self.frequency,
+            self.headers,
+        )
         # Assert that the handle_part() method of the mock object got
         # called with the expected arguments.
         mod_mock.handle_part.assert_called_once_with(
-            self.data, self.ctype, self.filename, self.payload)
+            self.data, self.ctype, self.filename, self.payload
+        )
 
     def test_no_handle_when_modfreq_once(self):
         """C{handle_part} is not called if frequency is once."""
         self.frequency = "once"
         mod_mock = mock.Mock(frequency=settings.PER_ONCE)
-        handlers.run_part(mod_mock, self.data, self.filename, self.payload,
-                          self.frequency, self.headers)
+        handlers.run_part(
+            mod_mock,
+            self.data,
+            self.filename,
+            self.payload,
+            self.frequency,
+            self.headers,
+        )
         self.assertEqual(0, mod_mock.handle_part.call_count)
 
     def test_exception_is_caught(self):
         """Exceptions within C{handle_part} are caught and logged."""
-        mod_mock = mock.Mock(frequency=settings.PER_INSTANCE,
-                             handler_version=1)
+        mod_mock = mock.Mock(
+            frequency=settings.PER_INSTANCE, handler_version=1
+        )
         mod_mock.handle_part.side_effect = Exception
         try:
-            handlers.run_part(mod_mock, self.data, self.filename,
-                              self.payload, self.frequency, self.headers)
+            handlers.run_part(
+                mod_mock,
+                self.data,
+                self.filename,
+                self.payload,
+                self.frequency,
+                self.headers,
+            )
         except Exception:
             self.fail("Exception was not caught in handle_part")
 
         mod_mock.handle_part.assert_called_once_with(
-            self.data, self.ctype, self.filename, self.payload)
+            self.data, self.ctype, self.filename, self.payload
+        )
 
 
 class TestCmdlineUrl(CiTestCase):
     def test_parse_cmdline_url_nokey_raises_keyerror(self):
         self.assertRaises(
-            KeyError, main.parse_cmdline_url, 'root=foo bar single')
+            KeyError, main.parse_cmdline_url, "root=foo bar single"
+        )
 
     def test_parse_cmdline_url_found(self):
-        cmdline = 'root=foo bar single url=http://example.com arg1 -v'
+        cmdline = "root=foo bar single url=http://example.com arg1 -v"
         self.assertEqual(
-            ('url', 'http://example.com'), main.parse_cmdline_url(cmdline))
+            ("url", "http://example.com"), main.parse_cmdline_url(cmdline)
+        )
 
-    @mock.patch('cloudinit.cmd.main.url_helper.read_file_or_url')
+    @mock.patch("cloudinit.cmd.main.url_helper.read_file_or_url")
     def test_invalid_content(self, m_read):
         key = "cloud-config-url"
-        url = 'http://example.com/foo'
+        url = "http://example.com/foo"
         cmdline = "ro %s=%s bar=1" % (key, url)
         m_read.return_value = url_helper.StringResponse(b"unexpected blob")
 
         fpath = self.tmp_path("ccfile")
         lvl, msg = main.attempt_cmdline_url(
-            fpath, network=True, cmdline=cmdline)
+            fpath, network=True, cmdline=cmdline
+        )
         self.assertEqual(logging.WARN, lvl)
         self.assertIn(url, msg)
         self.assertFalse(os.path.exists(fpath))
 
-    @mock.patch('cloudinit.cmd.main.url_helper.read_file_or_url')
+    @mock.patch("cloudinit.cmd.main.url_helper.read_file_or_url")
     def test_valid_content(self, m_read):
         url = "http://example.com/foo"
         payload = b"#cloud-config\nmydata: foo\nbar: wark\n"
-        cmdline = "ro %s=%s bar=1" % ('cloud-config-url', url)
+        cmdline = "ro %s=%s bar=1" % ("cloud-config-url", url)
 
         m_read.return_value = url_helper.StringResponse(payload)
         fpath = self.tmp_path("ccfile")
         lvl, msg = main.attempt_cmdline_url(
-            fpath, network=True, cmdline=cmdline)
+            fpath, network=True, cmdline=cmdline
+        )
         self.assertEqual(util.load_file(fpath, decode=False), payload)
         self.assertEqual(logging.INFO, lvl)
         self.assertIn(url, msg)
 
-    @mock.patch('cloudinit.cmd.main.url_helper.read_file_or_url')
+    @mock.patch("cloudinit.cmd.main.url_helper.read_file_or_url")
     def test_no_key_found(self, m_read):
         cmdline = "ro mykey=http://example.com/foo root=foo"
         fpath = self.tmp_path("ccpath")
         lvl, _msg = main.attempt_cmdline_url(
-            fpath, network=True, cmdline=cmdline)
+            fpath, network=True, cmdline=cmdline
+        )
 
         m_read.assert_not_called()
         self.assertFalse(os.path.exists(fpath))
         self.assertEqual(logging.DEBUG, lvl)
 
-    @mock.patch('cloudinit.cmd.main.url_helper.read_file_or_url')
+    @mock.patch("cloudinit.cmd.main.url_helper.read_file_or_url")
     def test_exception_warns(self, m_read):
         url = "http://example.com/foo"
         cmdline = "ro cloud-config-url=%s root=LABEL=bar" % url
         fpath = self.tmp_path("ccfile")
         m_read.side_effect = url_helper.UrlError(
-            cause="Unexpected Error", url="http://example.com/foo")
+            cause="Unexpected Error", url="http://example.com/foo"
+        )
 
         lvl, msg = main.attempt_cmdline_url(
-            fpath, network=True, cmdline=cmdline)
+            fpath, network=True, cmdline=cmdline
+        )
         self.assertEqual(logging.WARN, lvl)
         self.assertIn(url, msg)
         self.assertFalse(os.path.exists(fpath))
diff --git a/tests/unittests/test_atomic_helper.py b/tests/unittests/test_atomic_helper.py
index 0c8b8e53..684a9ae5 100644
--- a/tests/unittests/test_atomic_helper.py
+++ b/tests/unittests/test_atomic_helper.py
@@ -5,7 +5,6 @@ import os
 import stat
 
 from cloudinit import atomic_helper
-
 from tests.unittests.helpers import CiTestCase
 
 
@@ -34,7 +33,7 @@ class TestAtomicHelper(CiTestCase):
     def test_write_json(self):
         """write_json output is readable json."""
         path = self.tmp_path("test_write_json")
-        data = {'key1': 'value1', 'key2': ['i1', 'i2']}
+        data = {"key1": "value1", "key2": ["i1", "i2"]}
         atomic_helper.write_json(path, data)
         with open(path, "r") as fp:
             found = json.load(fp)
@@ -55,4 +54,5 @@ class TestAtomicHelper(CiTestCase):
         file_stat = os.stat(path)
         self.assertEqual(perms, stat.S_IMODE(file_stat.st_mode))
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_builtin_handlers.py b/tests/unittests/test_builtin_handlers.py
index cf2c0a4d..a057be2a 100644
--- a/tests/unittests/test_builtin_handlers.py
+++ b/tests/unittests/test_builtin_handlers.py
@@ -5,54 +5,59 @@
 import copy
 import errno
 import os
-import pytest
 import shutil
 import tempfile
 from textwrap import dedent
 
+import pytest
 
-from tests.unittests.helpers import (
-    FilesystemMockingTestCase, CiTestCase, mock, skipUnlessJinja)
-
-from cloudinit import handlers
-from cloudinit import helpers
-from cloudinit import subp
-from cloudinit import util
-
+from cloudinit import handlers, helpers, subp, util
 from cloudinit.handlers.cloud_config import CloudConfigPartHandler
 from cloudinit.handlers.jinja_template import (
-    JinjaTemplatePartHandler, convert_jinja_instance_data,
-    render_jinja_payload)
+    JinjaTemplatePartHandler,
+    convert_jinja_instance_data,
+    render_jinja_payload,
+)
 from cloudinit.handlers.shell_script import ShellScriptPartHandler
 from cloudinit.handlers.upstart_job import UpstartJobPartHandler
+from cloudinit.settings import PER_ALWAYS, PER_INSTANCE
+from tests.unittests.helpers import (
+    CiTestCase,
+    FilesystemMockingTestCase,
+    mock,
+    skipUnlessJinja,
+)
 
-from cloudinit.settings import (PER_ALWAYS, PER_INSTANCE)
-
-INSTANCE_DATA_FILE = 'instance-data-sensitive.json'
+INSTANCE_DATA_FILE = "instance-data-sensitive.json"
 
 
 class TestUpstartJobPartHandler(FilesystemMockingTestCase):
 
-    mpath = 'cloudinit.handlers.upstart_job.'
+    mpath = "cloudinit.handlers.upstart_job."
 
     def test_upstart_frequency_no_out(self):
         c_root = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, c_root)
         up_root = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, up_root)
-        paths = helpers.Paths({
-            'cloud_dir': c_root,
-            'upstart_dir': up_root,
-        })
+        paths = helpers.Paths(
+            {
+                "cloud_dir": c_root,
+                "upstart_dir": up_root,
+            }
+        )
         h = UpstartJobPartHandler(paths)
         # No files should be written out when
         # the frequency is ! per-instance
-        h.handle_part('', handlers.CONTENT_START,
-                      None, None, None)
-        h.handle_part('blah', 'text/upstart-job',
-                      'test.conf', 'blah', frequency=PER_ALWAYS)
-        h.handle_part('', handlers.CONTENT_END,
-                      None, None, None)
+        h.handle_part("", handlers.CONTENT_START, None, None, None)
+        h.handle_part(
+            "blah",
+            "text/upstart-job",
+            "test.conf",
+            "blah",
+            frequency=PER_ALWAYS,
+        )
+        h.handle_part("", handlers.CONTENT_END, None, None, None)
         self.assertEqual(0, len(os.listdir(up_root)))
 
     def test_upstart_frequency_single(self):
@@ -62,47 +67,54 @@ class TestUpstartJobPartHandler(FilesystemMockingTestCase):
 
         self.patchOS(new_root)
         self.patchUtils(new_root)
-        paths = helpers.Paths({
-            'upstart_dir': "/etc/upstart",
-        })
+        paths = helpers.Paths(
+            {
+                "upstart_dir": "/etc/upstart",
+            }
+        )
 
         util.ensure_dir("/run")
         util.ensure_dir("/etc/upstart")
 
-        with mock.patch(self.mpath + 'SUITABLE_UPSTART', return_value=True):
-            with mock.patch.object(subp, 'subp') as m_subp:
+        with mock.patch(self.mpath + "SUITABLE_UPSTART", return_value=True):
+            with mock.patch.object(subp, "subp") as m_subp:
                 h = UpstartJobPartHandler(paths)
-                h.handle_part('', handlers.CONTENT_START,
-                              None, None, None)
-                h.handle_part('blah', 'text/upstart-job',
-                              'test.conf', 'blah', frequency=PER_INSTANCE)
-                h.handle_part('', handlers.CONTENT_END,
-                              None, None, None)
+                h.handle_part("", handlers.CONTENT_START, None, None, None)
+                h.handle_part(
+                    "blah",
+                    "text/upstart-job",
+                    "test.conf",
+                    "blah",
+                    frequency=PER_INSTANCE,
+                )
+                h.handle_part("", handlers.CONTENT_END, None, None, None)
 
-        self.assertEqual(len(os.listdir('/etc/upstart')), 1)
+        self.assertEqual(len(os.listdir("/etc/upstart")), 1)
 
         m_subp.assert_called_once_with(
-            ['initctl', 'reload-configuration'], capture=False)
+            ["initctl", "reload-configuration"], capture=False
+        )
 
 
 class TestJinjaTemplatePartHandler(CiTestCase):
 
     with_logs = True
 
-    mpath = 'cloudinit.handlers.jinja_template.'
+    mpath = "cloudinit.handlers.jinja_template."
 
     def setUp(self):
         super(TestJinjaTemplatePartHandler, self).setUp()
         self.tmp = self.tmp_dir()
-        self.run_dir = os.path.join(self.tmp, 'run_dir')
+        self.run_dir = os.path.join(self.tmp, "run_dir")
         util.ensure_dir(self.run_dir)
-        self.paths = helpers.Paths({
-            'cloud_dir': self.tmp, 'run_dir': self.run_dir})
+        self.paths = helpers.Paths(
+            {"cloud_dir": self.tmp, "run_dir": self.run_dir}
+        )
 
     def test_jinja_template_part_handler_defaults(self):
         """On init, paths are saved and subhandler types are empty."""
         h = JinjaTemplatePartHandler(self.paths)
-        self.assertEqual(['## template: jinja'], h.prefixes)
+        self.assertEqual(["## template: jinja"], h.prefixes)
         self.assertEqual(3, h.handler_version)
         self.assertEqual(self.paths, h.paths)
         self.assertEqual({}, h.sub_handlers)
@@ -112,34 +124,47 @@ class TestJinjaTemplatePartHandler(CiTestCase):
         script_handler = ShellScriptPartHandler(self.paths)
         cloudconfig_handler = CloudConfigPartHandler(self.paths)
         h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler, cloudconfig_handler])
+            self.paths, sub_handlers=[script_handler, cloudconfig_handler]
+        )
         self.assertCountEqual(
-            ['text/cloud-config', 'text/cloud-config-jsonp',
-             'text/x-shellscript'],
-            h.sub_handlers)
+            [
+                "text/cloud-config",
+                "text/cloud-config-jsonp",
+                "text/x-shellscript",
+            ],
+            h.sub_handlers,
+        )
 
     def test_jinja_template_part_handler_looks_up_subhandler_types(self):
         """When sub_handlers are passed, init lists types of subhandlers."""
         script_handler = ShellScriptPartHandler(self.paths)
         cloudconfig_handler = CloudConfigPartHandler(self.paths)
         h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler, cloudconfig_handler])
+            self.paths, sub_handlers=[script_handler, cloudconfig_handler]
+        )
         self.assertCountEqual(
-            ['text/cloud-config', 'text/cloud-config-jsonp',
-             'text/x-shellscript'],
-            h.sub_handlers)
+            [
+                "text/cloud-config",
+                "text/cloud-config-jsonp",
+                "text/x-shellscript",
+            ],
+            h.sub_handlers,
+        )
 
     def test_jinja_template_handle_noop_on_content_signals(self):
         """Perform no part handling when content type is CONTENT_SIGNALS."""
         script_handler = ShellScriptPartHandler(self.paths)
 
-        h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler])
-        with mock.patch.object(script_handler, 'handle_part') as m_handle_part:
+        h = JinjaTemplatePartHandler(self.paths, sub_handlers=[script_handler])
+        with mock.patch.object(script_handler, "handle_part") as m_handle_part:
             h.handle_part(
-                data='data', ctype=handlers.CONTENT_START, filename='part-1',
-                payload='## template: jinja\n#!/bin/bash\necho himom',
-                frequency='freq', headers='headers')
+                data="data",
+                ctype=handlers.CONTENT_START,
+                filename="part-1",
+                payload="## template: jinja\n#!/bin/bash\necho himom",
+                frequency="freq",
+                headers="headers",
+            )
         m_handle_part.assert_not_called()
 
     @skipUnlessJinja()
@@ -150,19 +175,22 @@ class TestJinjaTemplatePartHandler(CiTestCase):
 
         # Create required instance data json file
         instance_json = os.path.join(self.run_dir, INSTANCE_DATA_FILE)
-        instance_data = {'topkey': 'echo himom'}
+        instance_data = {"topkey": "echo himom"}
         util.write_file(instance_json, util.json_dumps(instance_data))
-        h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler])
-        with mock.patch.object(script_handler, 'handle_part') as m_part:
+        h = JinjaTemplatePartHandler(self.paths, sub_handlers=[script_handler])
+        with mock.patch.object(script_handler, "handle_part") as m_part:
             # ctype with leading '!' not in handlers.CONTENT_SIGNALS
             h.handle_part(
-                data='data', ctype="!" + handlers.CONTENT_START,
-                filename='part01',
-                payload='## template: jinja   \t \n#!/bin/bash\n{{ topkey }}',
-                frequency='freq', headers='headers')
+                data="data",
+                ctype="!" + handlers.CONTENT_START,
+                filename="part01",
+                payload="## template: jinja   \t \n#!/bin/bash\n{{ topkey }}",
+                frequency="freq",
+                headers="headers",
+            )
         m_part.assert_called_once_with(
-            'data', '!__begin__', 'part01', '#!/bin/bash\necho himom', 'freq')
+            "data", "!__begin__", "part01", "#!/bin/bash\necho himom", "freq"
+        )
 
     @skipUnlessJinja()
     def test_jinja_template_handle_subhandler_v3_with_clean_payload(self):
@@ -172,146 +200,163 @@ class TestJinjaTemplatePartHandler(CiTestCase):
 
         # Create required instance-data.json file
         instance_json = os.path.join(self.run_dir, INSTANCE_DATA_FILE)
-        instance_data = {'topkey': {'sub': 'runcmd: [echo hi]'}}
+        instance_data = {"topkey": {"sub": "runcmd: [echo hi]"}}
         util.write_file(instance_json, util.json_dumps(instance_data))
         h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[cloudcfg_handler])
-        with mock.patch.object(cloudcfg_handler, 'handle_part') as m_part:
+            self.paths, sub_handlers=[cloudcfg_handler]
+        )
+        with mock.patch.object(cloudcfg_handler, "handle_part") as m_part:
             # ctype with leading '!' not in handlers.CONTENT_SIGNALS
             h.handle_part(
-                data='data', ctype="!" + handlers.CONTENT_END,
-                filename='part01',
-                payload='## template: jinja\n#cloud-config\n{{ topkey.sub }}',
-                frequency='freq', headers='headers')
+                data="data",
+                ctype="!" + handlers.CONTENT_END,
+                filename="part01",
+                payload="## template: jinja\n#cloud-config\n{{ topkey.sub }}",
+                frequency="freq",
+                headers="headers",
+            )
         m_part.assert_called_once_with(
-            'data', '!__end__', 'part01', '#cloud-config\nruncmd: [echo hi]',
-            'freq', 'headers')
+            "data",
+            "!__end__",
+            "part01",
+            "#cloud-config\nruncmd: [echo hi]",
+            "freq",
+            "headers",
+        )
 
     def test_jinja_template_handle_errors_on_missing_instance_data_json(self):
         """If instance-data is absent, raise an error from handle_part."""
         script_handler = ShellScriptPartHandler(self.paths)
-        h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler])
+        h = JinjaTemplatePartHandler(self.paths, sub_handlers=[script_handler])
         with self.assertRaises(RuntimeError) as context_manager:
             h.handle_part(
-                data='data', ctype="!" + handlers.CONTENT_START,
-                filename='part01',
-                payload='## template: jinja  \n#!/bin/bash\necho himom',
-                frequency='freq', headers='headers')
-        script_file = os.path.join(script_handler.script_dir, 'part01')
+                data="data",
+                ctype="!" + handlers.CONTENT_START,
+                filename="part01",
+                payload="## template: jinja  \n#!/bin/bash\necho himom",
+                frequency="freq",
+                headers="headers",
+            )
+        script_file = os.path.join(script_handler.script_dir, "part01")
         self.assertEqual(
-            'Cannot render jinja template vars. Instance data not yet present'
-            ' at {}/{}'.format(self.run_dir, INSTANCE_DATA_FILE),
-            str(context_manager.exception)
+            "Cannot render jinja template vars. Instance data not yet present"
+            " at {}/{}".format(self.run_dir, INSTANCE_DATA_FILE),
+            str(context_manager.exception),
         )
         self.assertFalse(
             os.path.exists(script_file),
-            'Unexpected file created %s' % script_file)
+            "Unexpected file created %s" % script_file,
+        )
 
     def test_jinja_template_handle_errors_on_unreadable_instance_data(self):
         """If instance-data is unreadable, raise an error from handle_part."""
         script_handler = ShellScriptPartHandler(self.paths)
-        instance_json = os.path.join(
-            self.run_dir, INSTANCE_DATA_FILE)
+        instance_json = os.path.join(self.run_dir, INSTANCE_DATA_FILE)
         util.write_file(instance_json, util.json_dumps({}))
-        h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler])
-        with mock.patch(self.mpath + 'load_file') as m_load:
+        h = JinjaTemplatePartHandler(self.paths, sub_handlers=[script_handler])
+        with mock.patch(self.mpath + "load_file") as m_load:
             with self.assertRaises(RuntimeError) as context_manager:
-                m_load.side_effect = OSError(errno.EACCES, 'Not allowed')
+                m_load.side_effect = OSError(errno.EACCES, "Not allowed")
                 h.handle_part(
-                    data='data', ctype="!" + handlers.CONTENT_START,
-                    filename='part01',
-                    payload='## template: jinja  \n#!/bin/bash\necho himom',
-                    frequency='freq', headers='headers')
-        script_file = os.path.join(script_handler.script_dir, 'part01')
+                    data="data",
+                    ctype="!" + handlers.CONTENT_START,
+                    filename="part01",
+                    payload="## template: jinja  \n#!/bin/bash\necho himom",
+                    frequency="freq",
+                    headers="headers",
+                )
+        script_file = os.path.join(script_handler.script_dir, "part01")
         self.assertEqual(
             "Cannot render jinja template vars. No read permission on "
             "'{}/{}'. Try sudo".format(self.run_dir, INSTANCE_DATA_FILE),
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
         self.assertFalse(
             os.path.exists(script_file),
-            'Unexpected file created %s' % script_file)
+            "Unexpected file created %s" % script_file,
+        )
 
     @skipUnlessJinja()
     def test_jinja_template_handle_renders_jinja_content(self):
         """When present, render jinja variables from instance data"""
         script_handler = ShellScriptPartHandler(self.paths)
         instance_json = os.path.join(self.run_dir, INSTANCE_DATA_FILE)
-        instance_data = {'topkey': {'subkey': 'echo himom'}}
+        instance_data = {"topkey": {"subkey": "echo himom"}}
         util.write_file(instance_json, util.json_dumps(instance_data))
-        h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler])
+        h = JinjaTemplatePartHandler(self.paths, sub_handlers=[script_handler])
         h.handle_part(
-            data='data', ctype="!" + handlers.CONTENT_START,
-            filename='part01',
+            data="data",
+            ctype="!" + handlers.CONTENT_START,
+            filename="part01",
             payload=(
-                '## template: jinja  \n'
-                '#!/bin/bash\n'
-                '{{ topkey.subkey|default("nosubkey") }}'),
-            frequency='freq', headers='headers')
-        script_file = os.path.join(script_handler.script_dir, 'part01')
+                "## template: jinja  \n"
+                "#!/bin/bash\n"
+                '{{ topkey.subkey|default("nosubkey") }}'
+            ),
+            frequency="freq",
+            headers="headers",
+        )
+        script_file = os.path.join(script_handler.script_dir, "part01")
         self.assertNotIn(
-            'Instance data not yet present at {}/{}'.format(
-                self.run_dir, INSTANCE_DATA_FILE),
-            self.logs.getvalue())
+            "Instance data not yet present at {}/{}".format(
+                self.run_dir, INSTANCE_DATA_FILE
+            ),
+            self.logs.getvalue(),
+        )
         self.assertEqual(
-            '#!/bin/bash\necho himom', util.load_file(script_file))
+            "#!/bin/bash\necho himom", util.load_file(script_file)
+        )
 
     @skipUnlessJinja()
     def test_jinja_template_handle_renders_jinja_content_missing_keys(self):
         """When specified jinja variable is undefined, log a warning."""
         script_handler = ShellScriptPartHandler(self.paths)
         instance_json = os.path.join(self.run_dir, INSTANCE_DATA_FILE)
-        instance_data = {'topkey': {'subkey': 'echo himom'}}
+        instance_data = {"topkey": {"subkey": "echo himom"}}
         util.write_file(instance_json, util.json_dumps(instance_data))
-        h = JinjaTemplatePartHandler(
-            self.paths, sub_handlers=[script_handler])
+        h = JinjaTemplatePartHandler(self.paths, sub_handlers=[script_handler])
         h.handle_part(
-            data='data', ctype="!" + handlers.CONTENT_START,
-            filename='part01',
-            payload='## template: jinja  \n#!/bin/bash\n{{ goodtry }}',
-            frequency='freq', headers='headers')
-        script_file = os.path.join(script_handler.script_dir, 'part01')
+            data="data",
+            ctype="!" + handlers.CONTENT_START,
+            filename="part01",
+            payload="## template: jinja  \n#!/bin/bash\n{{ goodtry }}",
+            frequency="freq",
+            headers="headers",
+        )
+        script_file = os.path.join(script_handler.script_dir, "part01")
         self.assertTrue(
             os.path.exists(script_file),
-            'Missing expected file %s' % script_file)
+            "Missing expected file %s" % script_file,
+        )
         self.assertIn(
             "WARNING: Could not render jinja template variables in file"
             " 'part01': 'goodtry'\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
 
 
 class TestConvertJinjaInstanceData:
-
     @pytest.mark.parametrize(
-        "include_key_aliases,data,expected", (
-            (
-                False,
-                {'my-key': 'my-val'},
-                {'my-key': 'my-val'}
-            ),
+        "include_key_aliases,data,expected",
+        (
+            (False, {"my-key": "my-val"}, {"my-key": "my-val"}),
             (
                 True,
-                {'my-key': 'my-val'},
-                {'my-key': 'my-val', 'my_key': 'my-val'}
-            ),
-            (
-                False,
-                {'my.key': 'my.val'},
-                {'my.key': 'my.val'}
+                {"my-key": "my-val"},
+                {"my-key": "my-val", "my_key": "my-val"},
             ),
+            (False, {"my.key": "my.val"}, {"my.key": "my.val"}),
             (
                 True,
-                {'my.key': 'my.val'},
-                {'my.key': 'my.val', 'my_key': 'my.val'}
+                {"my.key": "my.val"},
+                {"my.key": "my.val", "my_key": "my.val"},
             ),
             (
                 True,
-                {'my/key': 'my/val'},
-                {'my/key': 'my/val', 'my_key': 'my/val'}
+                {"my/key": "my/val"},
+                {"my/key": "my/val", "my_key": "my/val"},
             ),
-        )
+        ),
     )
     def test_convert_instance_data_operators_to_underscores(
         self, include_key_aliases, data, expected
@@ -328,39 +373,48 @@ class TestConvertJinjaInstanceData:
         allow ease of reference for users. Intsead of v1.availability_zone,
         the name availability_zone can be used in templates.
         """
-        data = {'ds': {'dskey1': 1, 'dskey2': 2},
-                'v1': {'v1key1': 'v1.1'},
-                'v2': {'v2key1': 'v2.1'}}
+        data = {
+            "ds": {"dskey1": 1, "dskey2": 2},
+            "v1": {"v1key1": "v1.1"},
+            "v2": {"v2key1": "v2.1"},
+        }
         expected_data = copy.deepcopy(data)
-        expected_data.update({'v1key1': 'v1.1', 'v2key1': 'v2.1'})
+        expected_data.update({"v1key1": "v1.1", "v2key1": "v2.1"})
 
         converted_data = convert_jinja_instance_data(data=data)
-        assert sorted(['ds', 'v1', 'v2', 'v1key1', 'v2key1']) == sorted(
+        assert sorted(["ds", "v1", "v2", "v1key1", "v2key1"]) == sorted(
             converted_data.keys()
         )
         assert expected_data == converted_data
 
     def test_convert_instance_data_most_recent_version_of_promoted_keys(self):
         """The most-recent versioned key value is promoted to top-level."""
-        data = {'v1': {'key1': 'old v1 key1', 'key2': 'old v1 key2'},
-                'v2': {'key1': 'newer v2 key1', 'key3': 'newer v2 key3'},
-                'v3': {'key1': 'newest v3 key1'}}
+        data = {
+            "v1": {"key1": "old v1 key1", "key2": "old v1 key2"},
+            "v2": {"key1": "newer v2 key1", "key3": "newer v2 key3"},
+            "v3": {"key1": "newest v3 key1"},
+        }
         expected_data = copy.deepcopy(data)
         expected_data.update(
-            {'key1': 'newest v3 key1', 'key2': 'old v1 key2',
-             'key3': 'newer v2 key3'})
+            {
+                "key1": "newest v3 key1",
+                "key2": "old v1 key2",
+                "key3": "newer v2 key3",
+            }
+        )
 
         converted_data = convert_jinja_instance_data(data=data)
         assert expected_data == converted_data
 
     def test_convert_instance_data_decodes_decode_paths(self):
         """Any decode_paths provided are decoded by convert_instance_data."""
-        data = {'key1': {'subkey1': 'aGkgbW9t'}, 'key2': 'aGkgZGFk'}
+        data = {"key1": {"subkey1": "aGkgbW9t"}, "key2": "aGkgZGFk"}
         expected_data = copy.deepcopy(data)
-        expected_data['key1']['subkey1'] = 'hi mom'
+        expected_data["key1"]["subkey1"] = "hi mom"
 
         converted_data = convert_jinja_instance_data(
-            data=data, decode_paths=('key1/subkey1',))
+            data=data, decode_paths=("key1/subkey1",)
+        )
         assert expected_data == converted_data
 
 
@@ -372,9 +426,11 @@ class TestRenderJinjaPayload(CiTestCase):
     def test_render_jinja_payload_logs_jinja_vars_on_debug(self):
         """When debug is True, log jinja varables available."""
         payload = (
-            '## template: jinja\n#!/bin/sh\necho hi from {{ v1.hostname }}')
-        instance_data = {'v1': {'hostname': 'foo'}, 'instance-id': 'iid'}
-        expected_log = dedent("""\
+            "## template: jinja\n#!/bin/sh\necho hi from {{ v1.hostname }}"
+        )
+        instance_data = {"v1": {"hostname": "foo"}, "instance-id": "iid"}
+        expected_log = dedent(
+            """\
             DEBUG: Converted jinja variables
             {
              "hostname": "foo",
@@ -384,28 +440,37 @@ class TestRenderJinjaPayload(CiTestCase):
               "hostname": "foo"
              }
             }
-            """)
+            """
+        )
         self.assertEqual(
             render_jinja_payload(
-                payload=payload, payload_fn='myfile',
-                instance_data=instance_data, debug=True),
-            '#!/bin/sh\necho hi from foo')
+                payload=payload,
+                payload_fn="myfile",
+                instance_data=instance_data,
+                debug=True,
+            ),
+            "#!/bin/sh\necho hi from foo",
+        )
         self.assertEqual(expected_log, self.logs.getvalue())
 
     @skipUnlessJinja()
     def test_render_jinja_payload_replaces_missing_variables_and_warns(self):
         """Warn on missing jinja variables and replace the absent variable."""
-        payload = (
-            '## template: jinja\n#!/bin/sh\necho hi from {{ NOTHERE }}')
-        instance_data = {'v1': {'hostname': 'foo'}, 'instance-id': 'iid'}
+        payload = "## template: jinja\n#!/bin/sh\necho hi from {{ NOTHERE }}"
+        instance_data = {"v1": {"hostname": "foo"}, "instance-id": "iid"}
         self.assertEqual(
             render_jinja_payload(
-                payload=payload, payload_fn='myfile',
-                instance_data=instance_data),
-            '#!/bin/sh\necho hi from CI_MISSING_JINJA_VAR/NOTHERE')
+                payload=payload,
+                payload_fn="myfile",
+                instance_data=instance_data,
+            ),
+            "#!/bin/sh\necho hi from CI_MISSING_JINJA_VAR/NOTHERE",
+        )
         expected_log = (
-            'WARNING: Could not render jinja template variables in file'
-            " 'myfile': 'NOTHERE'")
+            "WARNING: Could not render jinja template variables in file"
+            " 'myfile': 'NOTHERE'"
+        )
         self.assertIn(expected_log, self.logs.getvalue())
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_cli.py b/tests/unittests/test_cli.py
index e30e89a7..bed73a93 100644
--- a/tests/unittests/test_cli.py
+++ b/tests/unittests/test_cli.py
@@ -1,14 +1,13 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-import os
 import contextlib
 import io
+import os
 from collections import namedtuple
 
 from cloudinit.cmd import main as cli
-from tests.unittests import helpers as test_helpers
 from cloudinit.util import load_file, load_json
-
+from tests.unittests import helpers as test_helpers
 
 mock = test_helpers.mock
 
@@ -24,7 +23,7 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
 
     def _call_main(self, sysv_args=None):
         if not sysv_args:
-            sysv_args = ['cloud-init']
+            sysv_args = ["cloud-init"]
         try:
             return cli.main(sysv_args=sysv_args)
         except SystemExit as e:
@@ -36,36 +35,37 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
         Valid name values are only init and modules.
         """
         tmpd = self.tmp_dir()
-        data_d = self.tmp_path('data', tmpd)
-        link_d = self.tmp_path('link', tmpd)
-        FakeArgs = namedtuple('FakeArgs', ['action', 'local', 'mode'])
+        data_d = self.tmp_path("data", tmpd)
+        link_d = self.tmp_path("link", tmpd)
+        FakeArgs = namedtuple("FakeArgs", ["action", "local", "mode"])
 
         def myaction():
-            raise Exception('Should not call myaction')
+            raise Exception("Should not call myaction")
 
-        myargs = FakeArgs(('doesnotmatter', myaction), False, 'bogusmode')
+        myargs = FakeArgs(("doesnotmatter", myaction), False, "bogusmode")
         with self.assertRaises(ValueError) as cm:
-            cli.status_wrapper('init1', myargs, data_d, link_d)
-        self.assertEqual('unknown name: init1', str(cm.exception))
-        self.assertNotIn('Should not call myaction', self.logs.getvalue())
+            cli.status_wrapper("init1", myargs, data_d, link_d)
+        self.assertEqual("unknown name: init1", str(cm.exception))
+        self.assertNotIn("Should not call myaction", self.logs.getvalue())
 
     def test_status_wrapper_errors_on_invalid_modes(self):
         """status_wrapper will error if a parameter combination is invalid."""
         tmpd = self.tmp_dir()
-        data_d = self.tmp_path('data', tmpd)
-        link_d = self.tmp_path('link', tmpd)
-        FakeArgs = namedtuple('FakeArgs', ['action', 'local', 'mode'])
+        data_d = self.tmp_path("data", tmpd)
+        link_d = self.tmp_path("link", tmpd)
+        FakeArgs = namedtuple("FakeArgs", ["action", "local", "mode"])
 
         def myaction():
-            raise Exception('Should not call myaction')
+            raise Exception("Should not call myaction")
 
-        myargs = FakeArgs(('modules_name', myaction), False, 'bogusmode')
+        myargs = FakeArgs(("modules_name", myaction), False, "bogusmode")
         with self.assertRaises(ValueError) as cm:
-            cli.status_wrapper('modules', myargs, data_d, link_d)
+            cli.status_wrapper("modules", myargs, data_d, link_d)
         self.assertEqual(
             "Invalid cloud init mode specified 'modules-bogusmode'",
-            str(cm.exception))
-        self.assertNotIn('Should not call myaction', self.logs.getvalue())
+            str(cm.exception),
+        )
+        self.assertNotIn("Should not call myaction", self.logs.getvalue())
 
     def test_status_wrapper_init_local_writes_fresh_status_info(self):
         """When running in init-local mode, status_wrapper writes status.json.
@@ -73,78 +73,90 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
         Old status and results artifacts are also removed.
         """
         tmpd = self.tmp_dir()
-        data_d = self.tmp_path('data', tmpd)
-        link_d = self.tmp_path('link', tmpd)
-        status_link = self.tmp_path('status.json', link_d)
+        data_d = self.tmp_path("data", tmpd)
+        link_d = self.tmp_path("link", tmpd)
+        status_link = self.tmp_path("status.json", link_d)
         # Write old artifacts which will be removed or updated.
         for _dir in data_d, link_d:
             test_helpers.populate_dir(
-                _dir, {'status.json': 'old', 'result.json': 'old'})
+                _dir, {"status.json": "old", "result.json": "old"}
+            )
 
-        FakeArgs = namedtuple('FakeArgs', ['action', 'local', 'mode'])
+        FakeArgs = namedtuple("FakeArgs", ["action", "local", "mode"])
 
         def myaction(name, args):
             # Return an error to watch status capture them
-            return 'SomeDatasource', ['an error']
+            return "SomeDatasource", ["an error"]
 
-        myargs = FakeArgs(('ignored_name', myaction), True, 'bogusmode')
-        cli.status_wrapper('init', myargs, data_d, link_d)
+        myargs = FakeArgs(("ignored_name", myaction), True, "bogusmode")
+        cli.status_wrapper("init", myargs, data_d, link_d)
         # No errors reported in status
-        status_v1 = load_json(load_file(status_link))['v1']
-        self.assertEqual(['an error'], status_v1['init-local']['errors'])
-        self.assertEqual('SomeDatasource', status_v1['datasource'])
+        status_v1 = load_json(load_file(status_link))["v1"]
+        self.assertEqual(["an error"], status_v1["init-local"]["errors"])
+        self.assertEqual("SomeDatasource", status_v1["datasource"])
         self.assertFalse(
-            os.path.exists(self.tmp_path('result.json', data_d)),
-            'unexpected result.json found')
+            os.path.exists(self.tmp_path("result.json", data_d)),
+            "unexpected result.json found",
+        )
         self.assertFalse(
-            os.path.exists(self.tmp_path('result.json', link_d)),
-            'unexpected result.json link found')
+            os.path.exists(self.tmp_path("result.json", link_d)),
+            "unexpected result.json link found",
+        )
 
     def test_no_arguments_shows_usage(self):
         exit_code = self._call_main()
-        self.assertIn('usage: cloud-init', self.stderr.getvalue())
+        self.assertIn("usage: cloud-init", self.stderr.getvalue())
         self.assertEqual(2, exit_code)
 
     def test_no_arguments_shows_error_message(self):
         exit_code = self._call_main()
         missing_subcommand_message = [
-            'too few arguments',  # python2.7 msg
-            'the following arguments are required: subcommand'  # python3 msg
+            "too few arguments",  # python2.7 msg
+            "the following arguments are required: subcommand",  # python3 msg
         ]
         error = self.stderr.getvalue()
-        matches = ([msg in error for msg in missing_subcommand_message])
+        matches = [msg in error for msg in missing_subcommand_message]
         self.assertTrue(
-            any(matches), 'Did not find error message for missing subcommand')
+            any(matches), "Did not find error message for missing subcommand"
+        )
         self.assertEqual(2, exit_code)
 
     def test_all_subcommands_represented_in_help(self):
         """All known subparsers are represented in the cloud-int help doc."""
         self._call_main()
         error = self.stderr.getvalue()
-        expected_subcommands = ['analyze', 'clean', 'devel', 'dhclient-hook',
-                                'features', 'init', 'modules', 'single']
+        expected_subcommands = [
+            "analyze",
+            "clean",
+            "devel",
+            "dhclient-hook",
+            "features",
+            "init",
+            "modules",
+            "single",
+        ]
         for subcommand in expected_subcommands:
             self.assertIn(subcommand, error)
 
-    @mock.patch('cloudinit.cmd.main.status_wrapper')
+    @mock.patch("cloudinit.cmd.main.status_wrapper")
     def test_init_subcommand_parser(self, m_status_wrapper):
         """The subcommand 'init' calls status_wrapper passing init."""
-        self._call_main(['cloud-init', 'init'])
+        self._call_main(["cloud-init", "init"])
         (name, parseargs) = m_status_wrapper.call_args_list[0][0]
-        self.assertEqual('init', name)
-        self.assertEqual('init', parseargs.subcommand)
-        self.assertEqual('init', parseargs.action[0])
-        self.assertEqual('main_init', parseargs.action[1].__name__)
+        self.assertEqual("init", name)
+        self.assertEqual("init", parseargs.subcommand)
+        self.assertEqual("init", parseargs.action[0])
+        self.assertEqual("main_init", parseargs.action[1].__name__)
 
-    @mock.patch('cloudinit.cmd.main.status_wrapper')
+    @mock.patch("cloudinit.cmd.main.status_wrapper")
     def test_modules_subcommand_parser(self, m_status_wrapper):
         """The subcommand 'modules' calls status_wrapper passing modules."""
-        self._call_main(['cloud-init', 'modules'])
+        self._call_main(["cloud-init", "modules"])
         (name, parseargs) = m_status_wrapper.call_args_list[0][0]
-        self.assertEqual('modules', name)
-        self.assertEqual('modules', parseargs.subcommand)
-        self.assertEqual('modules', parseargs.action[0])
-        self.assertEqual('main_modules', parseargs.action[1].__name__)
+        self.assertEqual("modules", name)
+        self.assertEqual("modules", parseargs.subcommand)
+        self.assertEqual("modules", parseargs.action[0])
+        self.assertEqual("main_modules", parseargs.action[1].__name__)
 
     def test_conditional_subcommands_from_entry_point_sys_argv(self):
         """Subcommands from entry-point are properly parsed from sys.argv."""
@@ -152,14 +164,22 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
         self.patchStdoutAndStderr(stdout=stdout)
 
         expected_errors = [
-            'usage: cloud-init analyze', 'usage: cloud-init clean',
-            'usage: cloud-init collect-logs', 'usage: cloud-init devel',
-            'usage: cloud-init status']
+            "usage: cloud-init analyze",
+            "usage: cloud-init clean",
+            "usage: cloud-init collect-logs",
+            "usage: cloud-init devel",
+            "usage: cloud-init status",
+        ]
         conditional_subcommands = [
-            'analyze', 'clean', 'collect-logs', 'devel', 'status']
+            "analyze",
+            "clean",
+            "collect-logs",
+            "devel",
+            "status",
+        ]
         # The cloud-init entrypoint calls main without passing sys_argv
         for subcommand in conditional_subcommands:
-            with mock.patch('sys.argv', ['cloud-init', subcommand, '-h']):
+            with mock.patch("sys.argv", ["cloud-init", subcommand, "-h"]):
                 try:
                     cli.main()
                 except SystemExit as e:
@@ -169,9 +189,9 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
 
     def test_analyze_subcommand_parser(self):
         """The subcommand cloud-init analyze calls the correct subparser."""
-        self._call_main(['cloud-init', 'analyze'])
+        self._call_main(["cloud-init", "analyze"])
         # These subcommands only valid for cloud-init analyze script
-        expected_subcommands = ['blame', 'show', 'dump']
+        expected_subcommands = ["blame", "show", "dump"]
         error = self.stderr.getvalue()
         for subcommand in expected_subcommands:
             self.assertIn(subcommand, error)
@@ -181,43 +201,44 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
         # Provide -h param to collect-logs to avoid having to mock behavior.
         stdout = io.StringIO()
         self.patchStdoutAndStderr(stdout=stdout)
-        self._call_main(['cloud-init', 'collect-logs', '-h'])
-        self.assertIn('usage: cloud-init collect-log', stdout.getvalue())
+        self._call_main(["cloud-init", "collect-logs", "-h"])
+        self.assertIn("usage: cloud-init collect-log", stdout.getvalue())
 
     def test_clean_subcommand_parser(self):
         """The subcommand cloud-init clean calls the subparser."""
         # Provide -h param to clean to avoid having to mock behavior.
         stdout = io.StringIO()
         self.patchStdoutAndStderr(stdout=stdout)
-        self._call_main(['cloud-init', 'clean', '-h'])
-        self.assertIn('usage: cloud-init clean', stdout.getvalue())
+        self._call_main(["cloud-init", "clean", "-h"])
+        self.assertIn("usage: cloud-init clean", stdout.getvalue())
 
     def test_status_subcommand_parser(self):
         """The subcommand cloud-init status calls the subparser."""
         # Provide -h param to clean to avoid having to mock behavior.
         stdout = io.StringIO()
         self.patchStdoutAndStderr(stdout=stdout)
-        self._call_main(['cloud-init', 'status', '-h'])
-        self.assertIn('usage: cloud-init status', stdout.getvalue())
+        self._call_main(["cloud-init", "status", "-h"])
+        self.assertIn("usage: cloud-init status", stdout.getvalue())
 
     def test_devel_subcommand_parser(self):
         """The subcommand cloud-init devel calls the correct subparser."""
-        self._call_main(['cloud-init', 'devel'])
+        self._call_main(["cloud-init", "devel"])
         # These subcommands only valid for cloud-init schema script
-        expected_subcommands = ['schema']
+        expected_subcommands = ["schema"]
         error = self.stderr.getvalue()
         for subcommand in expected_subcommands:
             self.assertIn(subcommand, error)
 
     def test_wb_devel_schema_subcommand_parser(self):
         """The subcommand cloud-init schema calls the correct subparser."""
-        exit_code = self._call_main(['cloud-init', 'devel', 'schema'])
+        exit_code = self._call_main(["cloud-init", "devel", "schema"])
         self.assertEqual(1, exit_code)
         # Known whitebox output from schema subcommand
         self.assertEqual(
-            'Error:\n'
-            'Expected one of --config-file, --system or --docs arguments\n',
-            self.stderr.getvalue())
+            "Error:\n"
+            "Expected one of --config-file, --system or --docs arguments\n",
+            self.stderr.getvalue(),
+        )
 
     def test_wb_devel_schema_subcommand_doc_all_spot_check(self):
         """Validate that doc content has correct values from known examples.
@@ -234,12 +255,10 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
             self._call_main(["cloud-init", "devel", "schema", "--docs", "all"])
             expected_doc_sections = [
                 "**Supported distros:** all",
-                (
-                    "**Supported distros:** almalinux, alpine, centos, "
-                    "cloudlinux, debian, eurolinux, fedora, miraclelinux, "
-                    "openEuler, opensuse, photon, rhel, rocky, sles, ubuntu, "
-                    "virtuozzo"
-                ),
+                "**Supported distros:** almalinux, alpine, centos, "
+                "cloudlinux, debian, eurolinux, fedora, miraclelinux, "
+                "openEuler, opensuse, photon, rhel, rocky, sles, ubuntu, "
+                "virtuozzo",
                 "**Config schema**:\n    **resize_rootfs:** "
                 "(true/false/noblock)",
                 "**Examples**::\n\n    runcmd:\n        - [ ls, -l, / ]\n",
@@ -316,42 +335,43 @@ class TestCLI(test_helpers.FilesystemMockingTestCase):
         for expected in expected_doc_sections:
             self.assertIn(expected, stderr)
 
-    @mock.patch('cloudinit.cmd.main.main_single')
+    @mock.patch("cloudinit.cmd.main.main_single")
     def test_single_subcommand(self, m_main_single):
         """The subcommand 'single' calls main_single with valid args."""
-        self._call_main(['cloud-init', 'single', '--name', 'cc_ntp'])
+        self._call_main(["cloud-init", "single", "--name", "cc_ntp"])
         (name, parseargs) = m_main_single.call_args_list[0][0]
-        self.assertEqual('single', name)
-        self.assertEqual('single', parseargs.subcommand)
-        self.assertEqual('single', parseargs.action[0])
+        self.assertEqual("single", name)
+        self.assertEqual("single", parseargs.subcommand)
+        self.assertEqual("single", parseargs.action[0])
         self.assertFalse(parseargs.debug)
         self.assertFalse(parseargs.force)
         self.assertIsNone(parseargs.frequency)
-        self.assertEqual('cc_ntp', parseargs.name)
+        self.assertEqual("cc_ntp", parseargs.name)
         self.assertFalse(parseargs.report)
 
-    @mock.patch('cloudinit.cmd.main.dhclient_hook.handle_args')
+    @mock.patch("cloudinit.cmd.main.dhclient_hook.handle_args")
     def test_dhclient_hook_subcommand(self, m_handle_args):
         """The subcommand 'dhclient-hook' calls dhclient_hook with args."""
-        self._call_main(['cloud-init', 'dhclient-hook', 'up', 'eth0'])
+        self._call_main(["cloud-init", "dhclient-hook", "up", "eth0"])
         (name, parseargs) = m_handle_args.call_args_list[0][0]
-        self.assertEqual('dhclient-hook', name)
-        self.assertEqual('dhclient-hook', parseargs.subcommand)
-        self.assertEqual('dhclient-hook', parseargs.action[0])
+        self.assertEqual("dhclient-hook", name)
+        self.assertEqual("dhclient-hook", parseargs.subcommand)
+        self.assertEqual("dhclient-hook", parseargs.action[0])
         self.assertFalse(parseargs.debug)
         self.assertFalse(parseargs.force)
-        self.assertEqual('up', parseargs.event)
-        self.assertEqual('eth0', parseargs.interface)
+        self.assertEqual("up", parseargs.event)
+        self.assertEqual("eth0", parseargs.interface)
 
-    @mock.patch('cloudinit.cmd.main.main_features')
+    @mock.patch("cloudinit.cmd.main.main_features")
     def test_features_hook_subcommand(self, m_features):
         """The subcommand 'features' calls main_features with args."""
-        self._call_main(['cloud-init', 'features'])
+        self._call_main(["cloud-init", "features"])
         (name, parseargs) = m_features.call_args_list[0][0]
-        self.assertEqual('features', name)
-        self.assertEqual('features', parseargs.subcommand)
-        self.assertEqual('features', parseargs.action[0])
+        self.assertEqual("features", name)
+        self.assertEqual("features", parseargs.subcommand)
+        self.assertEqual("features", parseargs.action[0])
         self.assertFalse(parseargs.debug)
         self.assertFalse(parseargs.force)
 
+
 # : ts=4 expandtab
diff --git a/tests/unittests/test_conftest.py b/tests/unittests/test_conftest.py
index 2e02b7a7..68903430 100644
--- a/tests/unittests/test_conftest.py
+++ b/tests/unittests/test_conftest.py
@@ -19,7 +19,7 @@ class TestDisableSubpUsage:
 
     @pytest.mark.allow_all_subp
     def test_subp_usage_can_be_reenabled(self):
-        subp.subp(['whoami'])
+        subp.subp(["whoami"])
 
     @pytest.mark.allow_subp_for("whoami")
     def test_subp_usage_can_be_conditionally_reenabled(self):
@@ -28,15 +28,15 @@ class TestDisableSubpUsage:
         with pytest.raises(AssertionError) as excinfo:
             subp.subp(["some", "args"])
         assert "allowed: whoami" in str(excinfo.value)
-        subp.subp(['whoami'])
+        subp.subp(["whoami"])
 
     @pytest.mark.allow_subp_for("whoami", "bash")
     def test_subp_usage_can_be_conditionally_reenabled_for_multiple_cmds(self):
         with pytest.raises(AssertionError) as excinfo:
             subp.subp(["some", "args"])
         assert "allowed: whoami,bash" in str(excinfo.value)
-        subp.subp(['bash', '-c', 'true'])
-        subp.subp(['whoami'])
+        subp.subp(["bash", "-c", "true"])
+        subp.subp(["whoami"])
 
     @pytest.mark.allow_all_subp
     @pytest.mark.allow_subp_for("bash")
@@ -60,6 +60,6 @@ class TestDisableSubpUsageInTestSubclass(CiTestCase):
         _old_allowed_subp = self.allow_subp
         self.allowed_subp = True
         try:
-            subp.subp(['bash', '-c', 'true'])
+            subp.subp(["bash", "-c", "true"])
         finally:
             self.allowed_subp = _old_allowed_subp
diff --git a/tests/unittests/test_cs_util.py b/tests/unittests/test_cs_util.py
index be9da40c..109e0208 100644
--- a/tests/unittests/test_cs_util.py
+++ b/tests/unittests/test_cs_util.py
@@ -1,9 +1,7 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from tests.unittests import helpers as test_helpers
-
 from cloudinit.cs_utils import Cepko
-
+from tests.unittests import helpers as test_helpers
 
 SERVER_CONTEXT = {
     "cpu": 1000,
@@ -16,7 +14,7 @@ SERVER_CONTEXT = {
     "smp": 1,
     "tags": ["much server", "very performance"],
     "uuid": "65b2fb23-8c03-4187-a3ba-8b7c919e889",
-    "vnc_password": "9e84d6cb49e46379"
+    "vnc_password": "9e84d6cb49e46379",
 }
 
 
@@ -25,7 +23,7 @@ class CepkoMock(Cepko):
         return SERVER_CONTEXT
 
     def get(self, key="", request_pattern=None):
-        return SERVER_CONTEXT['tags']
+        return SERVER_CONTEXT["tags"]
 
 
 # 2015-01-22 BAW: This test is completely useless because it only ever tests
@@ -34,33 +32,36 @@ class CepkoMock(Cepko):
 class CepkoResultTests(test_helpers.TestCase):
     def setUp(self):
         self.c = Cepko()
-        raise test_helpers.SkipTest('This test is completely useless')
+        raise test_helpers.SkipTest("This test is completely useless")
 
     def test_getitem(self):
         result = self.c.all()
-        self.assertEqual("65b2fb23-8c03-4187-a3ba-8b7c919e889", result['uuid'])
-        self.assertEqual([], result['requirements'])
-        self.assertEqual("much server", result['tags'][0])
-        self.assertEqual(1, result['smp'])
+        self.assertEqual("65b2fb23-8c03-4187-a3ba-8b7c919e889", result["uuid"])
+        self.assertEqual([], result["requirements"])
+        self.assertEqual("much server", result["tags"][0])
+        self.assertEqual(1, result["smp"])
 
     def test_len(self):
         self.assertEqual(len(SERVER_CONTEXT), len(self.c.all()))
 
     def test_contains(self):
         result = self.c.all()
-        self.assertTrue('uuid' in result)
-        self.assertFalse('uid' in result)
-        self.assertTrue('meta' in result)
-        self.assertFalse('ssh_public_key' in result)
+        self.assertTrue("uuid" in result)
+        self.assertFalse("uid" in result)
+        self.assertTrue("meta" in result)
+        self.assertFalse("ssh_public_key" in result)
 
     def test_iter(self):
-        self.assertEqual(sorted(SERVER_CONTEXT.keys()),
-                         sorted([key for key in self.c.all()]))
+        self.assertEqual(
+            sorted(SERVER_CONTEXT.keys()),
+            sorted([key for key in self.c.all()]),
+        )
 
     def test_with_list_as_result(self):
-        result = self.c.get('tags')
-        self.assertEqual('much server', result[0])
-        self.assertTrue('very performance' in result)
+        result = self.c.get("tags")
+        self.assertEqual("much server", result[0])
+        self.assertTrue("very performance" in result)
         self.assertEqual(2, len(result))
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_data.py b/tests/unittests/test_data.py
index 2ee09bbb..a5018a42 100644
--- a/tests/unittests/test_data.py
+++ b/tests/unittests/test_data.py
@@ -5,37 +5,30 @@
 import gzip
 import logging
 import os
-from io import BytesIO, StringIO
-from unittest import mock
-
 from email import encoders
 from email.mime.application import MIMEApplication
 from email.mime.base import MIMEBase
 from email.mime.multipart import MIMEMultipart
+from io import BytesIO, StringIO
+from unittest import mock
 
 import httpretty
 
 from cloudinit import handlers
 from cloudinit import helpers as c_helpers
-from cloudinit import log
-from cloudinit.settings import (PER_INSTANCE)
-from cloudinit import sources
-from cloudinit import stages
+from cloudinit import log, safeyaml, sources, stages
 from cloudinit import user_data as ud
-from cloudinit import safeyaml
 from cloudinit import util
-
+from cloudinit.settings import PER_INSTANCE
 from tests.unittests import helpers
 
-
 INSTANCE_ID = "i-testing"
 
 
 class FakeDataSource(sources.DataSource):
-
     def __init__(self, userdata=None, vendordata=None, vendordata2=None):
         sources.DataSource.__init__(self, {}, None, None)
-        self.metadata = {'instance-id': INSTANCE_ID}
+        self.metadata = {"instance-id": INSTANCE_ID}
         self.userdata_raw = userdata
         self.vendordata_raw = vendordata
         self.vendordata2_raw = vendordata2
@@ -52,7 +45,7 @@ def count_messages(root):
 
 def gzip_text(text):
     contents = BytesIO()
-    f = gzip.GzipFile(fileobj=contents, mode='wb')
+    f = gzip.GzipFile(fileobj=contents, mode="wb")
     f.write(util.encode_text(text))
     f.flush()
     f.close()
@@ -62,7 +55,6 @@ def gzip_text(text):
 # FIXME: these tests shouldn't be checking log output??
 # Weirddddd...
 class TestConsumeUserData(helpers.FilesystemMockingTestCase):
-
     def setUp(self):
         super(TestConsumeUserData, self).setUp()
         self._log = None
@@ -87,13 +79,13 @@ class TestConsumeUserData(helpers.FilesystemMockingTestCase):
         return log_file
 
     def test_simple_jsonp(self):
-        blob = '''
+        blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/baz", "value": "qux" },
      { "op": "add", "path": "/bar", "value": "qux2" }
 ]
-'''
+"""
 
         ci = stages.Init()
         ci.datasource = FakeDataSource(blob)
@@ -103,20 +95,20 @@ class TestConsumeUserData(helpers.FilesystemMockingTestCase):
         cc_contents = util.load_file(ci.paths.get_ipath("cloud_config"))
         cc = util.load_yaml(cc_contents)
         self.assertEqual(2, len(cc))
-        self.assertEqual('qux', cc['baz'])
-        self.assertEqual('qux2', cc['bar'])
+        self.assertEqual("qux", cc["baz"])
+        self.assertEqual("qux2", cc["bar"])
 
     def test_simple_jsonp_vendor_and_vendor2_and_user(self):
         # test that user-data wins over vendor
-        user_blob = '''
+        user_blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/baz", "value": "qux" },
      { "op": "add", "path": "/bar", "value": "qux2" },
      { "op": "add", "path": "/foobar", "value": "qux3" }
 ]
-'''
-        vendor_blob = '''
+"""
+        vendor_blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/baz", "value": "quxA" },
@@ -124,61 +116,63 @@ class TestConsumeUserData(helpers.FilesystemMockingTestCase):
      { "op": "add", "path": "/foo", "value": "quxC" },
      { "op": "add", "path": "/corge", "value": "quxEE" }
 ]
-'''
-        vendor2_blob = '''
+"""
+        vendor2_blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/corge", "value": "quxD" },
      { "op": "add", "path": "/grault", "value": "quxFF" },
      { "op": "add", "path": "/foobar", "value": "quxGG" }
 ]
-'''
+"""
         self.reRoot()
         initer = stages.Init()
-        initer.datasource = FakeDataSource(user_blob,
-                                           vendordata=vendor_blob,
-                                           vendordata2=vendor2_blob)
+        initer.datasource = FakeDataSource(
+            user_blob, vendordata=vendor_blob, vendordata2=vendor2_blob
+        )
         initer.read_cfg()
         initer.initialize()
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data',
-                              initer.consume_data,
-                              args=[PER_INSTANCE],
-                              freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
         mods = stages.Modules(initer)
-        (_which_ran, _failures) = mods.run_section('cloud_init_modules')
+        (_which_ran, _failures) = mods.run_section("cloud_init_modules")
         cfg = mods.cfg
-        self.assertIn('vendor_data', cfg)
-        self.assertIn('vendor_data2', cfg)
+        self.assertIn("vendor_data", cfg)
+        self.assertIn("vendor_data2", cfg)
         # Confirm that vendordata2 overrides vendordata, and that
         #  userdata overrides both
-        self.assertEqual('qux', cfg['baz'])
-        self.assertEqual('qux2', cfg['bar'])
-        self.assertEqual('qux3', cfg['foobar'])
-        self.assertEqual('quxC', cfg['foo'])
-        self.assertEqual('quxD', cfg['corge'])
-        self.assertEqual('quxFF', cfg['grault'])
+        self.assertEqual("qux", cfg["baz"])
+        self.assertEqual("qux2", cfg["bar"])
+        self.assertEqual("qux3", cfg["foobar"])
+        self.assertEqual("quxC", cfg["foo"])
+        self.assertEqual("quxD", cfg["corge"])
+        self.assertEqual("quxFF", cfg["grault"])
 
     def test_simple_jsonp_no_vendor_consumed(self):
         # make sure that vendor data is not consumed
-        user_blob = '''
+        user_blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/baz", "value": "qux" },
      { "op": "add", "path": "/bar", "value": "qux2" },
      { "op": "add", "path": "/vendor_data", "value": {"enabled": "false"}}
 ]
-'''
-        vendor_blob = '''
+"""
+        vendor_blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/baz", "value": "quxA" },
      { "op": "add", "path": "/bar", "value": "quxB" },
      { "op": "add", "path": "/foo", "value": "quxC" }
 ]
-'''
+"""
         self.reRoot()
         initer = stages.Init()
         initer.datasource = FakeDataSource(user_blob, vendordata=vendor_blob)
@@ -187,35 +181,37 @@ class TestConsumeUserData(helpers.FilesystemMockingTestCase):
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data',
-                              initer.consume_data,
-                              args=[PER_INSTANCE],
-                              freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
         mods = stages.Modules(initer)
-        (_which_ran, _failures) = mods.run_section('cloud_init_modules')
+        (_which_ran, _failures) = mods.run_section("cloud_init_modules")
         cfg = mods.cfg
-        self.assertEqual('qux', cfg['baz'])
-        self.assertEqual('qux2', cfg['bar'])
-        self.assertNotIn('foo', cfg)
+        self.assertEqual("qux", cfg["baz"])
+        self.assertEqual("qux2", cfg["bar"])
+        self.assertNotIn("foo", cfg)
 
     def test_mixed_cloud_config(self):
-        blob_cc = '''
+        blob_cc = """
 #cloud-config
 a: b
 c: d
-'''
+"""
         message_cc = MIMEBase("text", "cloud-config")
         message_cc.set_payload(blob_cc)
 
-        blob_jp = '''
+        blob_jp = """
 #cloud-config-jsonp
 [
      { "op": "replace", "path": "/a", "value": "c" },
      { "op": "remove", "path": "/c" }
 ]
-'''
+"""
 
-        message_jp = MIMEBase('text', "cloud-config-jsonp")
+        message_jp = MIMEBase("text", "cloud-config-jsonp")
         message_jp.set_payload(blob_jp)
 
         message = MIMEMultipart()
@@ -230,26 +226,26 @@ c: d
         cc_contents = util.load_file(ci.paths.get_ipath("cloud_config"))
         cc = util.load_yaml(cc_contents)
         self.assertEqual(1, len(cc))
-        self.assertEqual('c', cc['a'])
+        self.assertEqual("c", cc["a"])
 
     def test_cloud_config_as_x_shell_script(self):
-        blob_cc = '''
+        blob_cc = """
 #cloud-config
 a: b
 c: d
-'''
+"""
         message_cc = MIMEBase("text", "x-shellscript")
         message_cc.set_payload(blob_cc)
 
-        blob_jp = '''
+        blob_jp = """
 #cloud-config-jsonp
 [
      { "op": "replace", "path": "/a", "value": "c" },
      { "op": "remove", "path": "/c" }
 ]
-'''
+"""
 
-        message_jp = MIMEBase('text', "cloud-config-jsonp")
+        message_jp = MIMEBase("text", "cloud-config-jsonp")
         message_jp.set_payload(blob_jp)
 
         message = MIMEMultipart()
@@ -264,19 +260,19 @@ c: d
         cc_contents = util.load_file(ci.paths.get_ipath("cloud_config"))
         cc = util.load_yaml(cc_contents)
         self.assertEqual(1, len(cc))
-        self.assertEqual('c', cc['a'])
+        self.assertEqual("c", cc["a"])
 
     def test_vendor_user_yaml_cloud_config(self):
-        vendor_blob = '''
+        vendor_blob = """
 #cloud-config
 a: b
 name: vendor
 run:
  - x
  - y
-'''
+"""
 
-        user_blob = '''
+        user_blob = """
 #cloud-config
 a: c
 vendor_data:
@@ -285,7 +281,7 @@ vendor_data:
 name: user
 run:
  - z
-'''
+"""
         self.reRoot()
         initer = stages.Init()
         initer.datasource = FakeDataSource(user_blob, vendordata=vendor_blob)
@@ -294,114 +290,122 @@ run:
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data',
-                              initer.consume_data,
-                              args=[PER_INSTANCE],
-                              freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
         mods = stages.Modules(initer)
-        (_which_ran, _failures) = mods.run_section('cloud_init_modules')
+        (_which_ran, _failures) = mods.run_section("cloud_init_modules")
         cfg = mods.cfg
-        self.assertIn('vendor_data', cfg)
-        self.assertEqual('c', cfg['a'])
-        self.assertEqual('user', cfg['name'])
-        self.assertNotIn('x', cfg['run'])
-        self.assertNotIn('y', cfg['run'])
-        self.assertIn('z', cfg['run'])
+        self.assertIn("vendor_data", cfg)
+        self.assertEqual("c", cfg["a"])
+        self.assertEqual("user", cfg["name"])
+        self.assertNotIn("x", cfg["run"])
+        self.assertNotIn("y", cfg["run"])
+        self.assertIn("z", cfg["run"])
 
     def test_vendordata_script(self):
-        vendor_blob = '''
+        vendor_blob = """
 #!/bin/bash
 echo "test"
-'''
-        vendor2_blob = '''
+"""
+        vendor2_blob = """
 #!/bin/bash
 echo "dynamic test"
-'''
+"""
 
-        user_blob = '''
+        user_blob = """
 #cloud-config
 vendor_data:
   enabled: True
   prefix: /bin/true
-'''
+"""
         new_root = self.reRoot()
         initer = stages.Init()
-        initer.datasource = FakeDataSource(user_blob,
-                                           vendordata=vendor_blob,
-                                           vendordata2=vendor2_blob)
+        initer.datasource = FakeDataSource(
+            user_blob, vendordata=vendor_blob, vendordata2=vendor2_blob
+        )
         initer.read_cfg()
         initer.initialize()
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data',
-                              initer.consume_data,
-                              args=[PER_INSTANCE],
-                              freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
         mods = stages.Modules(initer)
-        (_which_ran, _failures) = mods.run_section('cloud_init_modules')
-        vendor_script = initer.paths.get_ipath_cur('vendor_scripts')
+        (_which_ran, _failures) = mods.run_section("cloud_init_modules")
+        vendor_script = initer.paths.get_ipath_cur("vendor_scripts")
         vendor_script_fns = "%s%s/part-001" % (new_root, vendor_script)
         self.assertTrue(os.path.exists(vendor_script_fns))
 
     def test_merging_cloud_config(self):
-        blob = '''
+        blob = """
 #cloud-config
 a: b
 e: f
 run:
  - b
  - c
-'''
+"""
         message1 = MIMEBase("text", "cloud-config")
         message1.set_payload(blob)
 
-        blob2 = '''
+        blob2 = """
 #cloud-config
 a: e
 e: g
 run:
  - stuff
  - morestuff
-'''
+"""
         message2 = MIMEBase("text", "cloud-config")
-        message2['X-Merge-Type'] = ('dict(recurse_array,'
-                                    'recurse_str)+list(append)+str(append)')
+        message2[
+            "X-Merge-Type"
+        ] = "dict(recurse_array,recurse_str)+list(append)+str(append)"
         message2.set_payload(blob2)
 
-        blob3 = '''
+        blob3 = """
 #cloud-config
 e:
  - 1
  - 2
  - 3
 p: 1
-'''
+"""
         message3 = MIMEBase("text", "cloud-config")
         message3.set_payload(blob3)
 
         messages = [message1, message2, message3]
 
-        paths = c_helpers.Paths({}, ds=FakeDataSource(''))
+        paths = c_helpers.Paths({}, ds=FakeDataSource(""))
         cloud_cfg = handlers.cloud_config.CloudConfigPartHandler(paths)
 
         self.reRoot()
-        cloud_cfg.handle_part(None, handlers.CONTENT_START, None, None, None,
-                              None)
+        cloud_cfg.handle_part(
+            None, handlers.CONTENT_START, None, None, None, None
+        )
         for i, m in enumerate(messages):
             headers = dict(m)
             fn = "part-%s" % (i + 1)
             payload = m.get_payload(decode=True)
-            cloud_cfg.handle_part(None, headers['Content-Type'],
-                                  fn, payload, None, headers)
-        cloud_cfg.handle_part(None, handlers.CONTENT_END, None, None, None,
-                              None)
-        contents = util.load_file(paths.get_ipath('cloud_config'))
+            cloud_cfg.handle_part(
+                None, headers["Content-Type"], fn, payload, None, headers
+            )
+        cloud_cfg.handle_part(
+            None, handlers.CONTENT_END, None, None, None, None
+        )
+        contents = util.load_file(paths.get_ipath("cloud_config"))
         contents = util.load_yaml(contents)
-        self.assertEqual(contents['run'], ['b', 'c', 'stuff', 'morestuff'])
-        self.assertEqual(contents['a'], 'be')
-        self.assertEqual(contents['e'], [1, 2, 3])
-        self.assertEqual(contents['p'], 1)
+        self.assertEqual(contents["run"], ["b", "c", "stuff", "morestuff"])
+        self.assertEqual(contents["a"], "be")
+        self.assertEqual(contents["e"], [1, 2, 3])
+        self.assertEqual(contents["p"], 1)
 
     def test_unhandled_type_warning(self):
         """Raw text without magic is ignored but shows warning."""
@@ -410,35 +414,37 @@ p: 1
         data = "arbitrary text\n"
         ci.datasource = FakeDataSource(data)
 
-        with mock.patch('cloudinit.util.write_file') as mockobj:
+        with mock.patch("cloudinit.util.write_file") as mockobj:
             log_file = self.capture_log(logging.WARNING)
             ci.fetch()
             ci.consume_data()
             self.assertIn(
                 "Unhandled non-multipart (text/x-not-multipart) userdata:",
-                log_file.getvalue())
+                log_file.getvalue(),
+            )
 
         mockobj.assert_called_once_with(
-            ci.paths.get_ipath("cloud_config"), "", 0o600)
+            ci.paths.get_ipath("cloud_config"), "", 0o600
+        )
 
     def test_mime_gzip_compressed(self):
         """Tests that individual message gzip encoding works."""
 
         def gzip_part(text):
-            return MIMEApplication(gzip_text(text), 'gzip')
+            return MIMEApplication(gzip_text(text), "gzip")
 
-        base_content1 = '''
+        base_content1 = """
 #cloud-config
 a: 2
-'''
+"""
 
-        base_content2 = '''
+        base_content2 = """
 #cloud-config
 b: 3
 c: 4
-'''
+"""
 
-        message = MIMEMultipart('test')
+        message = MIMEMultipart("test")
         message.attach(gzip_part(base_content1))
         message.attach(gzip_part(base_content2))
         ci = stages.Init()
@@ -450,9 +456,9 @@ c: 4
         contents = util.load_yaml(contents)
         self.assertTrue(isinstance(contents, dict))
         self.assertEqual(3, len(contents))
-        self.assertEqual(2, contents['a'])
-        self.assertEqual(3, contents['b'])
-        self.assertEqual(4, contents['c'])
+        self.assertEqual(2, contents["a"])
+        self.assertEqual(3, contents["b"])
+        self.assertEqual(4, contents["c"])
 
     def test_mime_text_plain(self):
         """Mime message of type text/plain is ignored but shows warning."""
@@ -462,15 +468,17 @@ c: 4
         message.set_payload("Just text")
         ci.datasource = FakeDataSource(message.as_string().encode())
 
-        with mock.patch('cloudinit.util.write_file') as mockobj:
+        with mock.patch("cloudinit.util.write_file") as mockobj:
             log_file = self.capture_log(logging.WARNING)
             ci.fetch()
             ci.consume_data()
             self.assertIn(
                 "Unhandled unknown content-type (text/plain)",
-                log_file.getvalue())
+                log_file.getvalue(),
+            )
         mockobj.assert_called_once_with(
-            ci.paths.get_ipath("cloud_config"), "", 0o600)
+            ci.paths.get_ipath("cloud_config"), "", 0o600
+        )
 
     def test_shellscript(self):
         """Raw text starting #!/bin/sh is treated as script."""
@@ -481,15 +489,18 @@ c: 4
 
         outpath = os.path.join(ci.paths.get_ipath_cur("scripts"), "part-001")
 
-        with mock.patch('cloudinit.util.write_file') as mockobj:
+        with mock.patch("cloudinit.util.write_file") as mockobj:
             log_file = self.capture_log(logging.WARNING)
             ci.fetch()
             ci.consume_data()
             self.assertEqual("", log_file.getvalue())
 
-        mockobj.assert_has_calls([
-            mock.call(outpath, script, 0o700),
-            mock.call(ci.paths.get_ipath("cloud_config"), "", 0o600)])
+        mockobj.assert_has_calls(
+            [
+                mock.call(outpath, script, 0o700),
+                mock.call(ci.paths.get_ipath("cloud_config"), "", 0o600),
+            ]
+        )
 
     def test_mime_text_x_shellscript(self):
         """Mime message of type text/x-shellscript is treated as script."""
@@ -502,15 +513,18 @@ c: 4
 
         outpath = os.path.join(ci.paths.get_ipath_cur("scripts"), "part-001")
 
-        with mock.patch('cloudinit.util.write_file') as mockobj:
+        with mock.patch("cloudinit.util.write_file") as mockobj:
             log_file = self.capture_log(logging.WARNING)
             ci.fetch()
             ci.consume_data()
             self.assertEqual("", log_file.getvalue())
 
-        mockobj.assert_has_calls([
-            mock.call(outpath, script, 0o700),
-            mock.call(ci.paths.get_ipath("cloud_config"), "", 0o600)])
+        mockobj.assert_has_calls(
+            [
+                mock.call(outpath, script, 0o700),
+                mock.call(ci.paths.get_ipath("cloud_config"), "", 0o600),
+            ]
+        )
 
     def test_mime_text_plain_shell(self):
         """Mime type text/plain starting #!/bin/sh is treated as script."""
@@ -523,41 +537,48 @@ c: 4
 
         outpath = os.path.join(ci.paths.get_ipath_cur("scripts"), "part-001")
 
-        with mock.patch('cloudinit.util.write_file') as mockobj:
+        with mock.patch("cloudinit.util.write_file") as mockobj:
             log_file = self.capture_log(logging.WARNING)
             ci.fetch()
             ci.consume_data()
             self.assertEqual("", log_file.getvalue())
 
-        mockobj.assert_has_calls([
-            mock.call(outpath, script, 0o700),
-            mock.call(ci.paths.get_ipath("cloud_config"), "", 0o600)])
+        mockobj.assert_has_calls(
+            [
+                mock.call(outpath, script, 0o700),
+                mock.call(ci.paths.get_ipath("cloud_config"), "", 0o600),
+            ]
+        )
 
     def test_mime_application_octet_stream(self):
         """Mime type application/octet-stream is ignored but shows warning."""
         self.reRoot()
         ci = stages.Init()
         message = MIMEBase("application", "octet-stream")
-        message.set_payload(b'\xbf\xe6\xb2\xc3\xd3\xba\x13\xa4\xd8\xa1\xcc')
+        message.set_payload(b"\xbf\xe6\xb2\xc3\xd3\xba\x13\xa4\xd8\xa1\xcc")
         encoders.encode_base64(message)
         ci.datasource = FakeDataSource(message.as_string().encode())
 
-        with mock.patch('cloudinit.util.write_file') as mockobj:
+        with mock.patch("cloudinit.util.write_file") as mockobj:
             log_file = self.capture_log(logging.WARNING)
             ci.fetch()
             ci.consume_data()
             self.assertIn(
                 "Unhandled unknown content-type (application/octet-stream)",
-                log_file.getvalue())
+                log_file.getvalue(),
+            )
         mockobj.assert_called_once_with(
-            ci.paths.get_ipath("cloud_config"), "", 0o600)
+            ci.paths.get_ipath("cloud_config"), "", 0o600
+        )
 
     def test_cloud_config_archive(self):
-        non_decodable = b'\x11\xc9\xb4gTH\xee\x12'
-        data = [{'content': '#cloud-config\npassword: gocubs\n'},
-                {'content': '#cloud-config\nlocale: chicago\n'},
-                {'content': non_decodable}]
-        message = b'#cloud-config-archive\n' + safeyaml.dumps(data).encode()
+        non_decodable = b"\x11\xc9\xb4gTH\xee\x12"
+        data = [
+            {"content": "#cloud-config\npassword: gocubs\n"},
+            {"content": "#cloud-config\nlocale: chicago\n"},
+            {"content": non_decodable},
+        ]
+        message = b"#cloud-config-archive\n" + safeyaml.dumps(data).encode()
 
         self.reRoot()
         ci = stages.Init()
@@ -570,35 +591,35 @@ c: 4
 
         # consuming the user-data provided should write 'cloud_config' file
         # which will have our yaml in it.
-        with mock.patch('cloudinit.util.write_file') as mockobj:
+        with mock.patch("cloudinit.util.write_file") as mockobj:
             mockobj.side_effect = fsstore
             ci.fetch()
             ci.consume_data()
 
         cfg = util.load_yaml(fs[ci.paths.get_ipath("cloud_config")])
-        self.assertEqual(cfg.get('password'), 'gocubs')
-        self.assertEqual(cfg.get('locale'), 'chicago')
+        self.assertEqual(cfg.get("password"), "gocubs")
+        self.assertEqual(cfg.get("locale"), "chicago")
 
-    @mock.patch('cloudinit.util.read_conf_with_confd')
+    @mock.patch("cloudinit.util.read_conf_with_confd")
     def test_dont_allow_user_data(self, mock_cfg):
         mock_cfg.return_value = {"allow_userdata": False}
 
         # test that user-data is ignored but vendor-data is kept
-        user_blob = '''
+        user_blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/baz", "value": "qux" },
      { "op": "add", "path": "/bar", "value": "qux2" }
 ]
-'''
-        vendor_blob = '''
+"""
+        vendor_blob = """
 #cloud-config-jsonp
 [
      { "op": "add", "path": "/baz", "value": "quxA" },
      { "op": "add", "path": "/bar", "value": "quxB" },
      { "op": "add", "path": "/foo", "value": "quxC" }
 ]
-'''
+"""
         self.reRoot()
         initer = stages.Init()
         initer.datasource = FakeDataSource(user_blob, vendordata=vendor_blob)
@@ -607,21 +628,22 @@ c: 4
         initer.fetch()
         initer.instancify()
         initer.update()
-        initer.cloudify().run('consume_data',
-                              initer.consume_data,
-                              args=[PER_INSTANCE],
-                              freq=PER_INSTANCE)
+        initer.cloudify().run(
+            "consume_data",
+            initer.consume_data,
+            args=[PER_INSTANCE],
+            freq=PER_INSTANCE,
+        )
         mods = stages.Modules(initer)
-        (_which_ran, _failures) = mods.run_section('cloud_init_modules')
+        (_which_ran, _failures) = mods.run_section("cloud_init_modules")
         cfg = mods.cfg
-        self.assertIn('vendor_data', cfg)
-        self.assertEqual('quxA', cfg['baz'])
-        self.assertEqual('quxB', cfg['bar'])
-        self.assertEqual('quxC', cfg['foo'])
+        self.assertIn("vendor_data", cfg)
+        self.assertEqual("quxA", cfg["baz"])
+        self.assertEqual("quxB", cfg["bar"])
+        self.assertEqual("quxC", cfg["foo"])
 
 
 class TestConsumeUserDataHttp(TestConsumeUserData, helpers.HttprettyTestCase):
-
     def setUp(self):
         TestConsumeUserData.setUp(self)
         helpers.HttprettyTestCase.setUp(self)
@@ -630,14 +652,14 @@ class TestConsumeUserDataHttp(TestConsumeUserData, helpers.HttprettyTestCase):
         TestConsumeUserData.tearDown(self)
         helpers.HttprettyTestCase.tearDown(self)
 
-    @mock.patch('cloudinit.url_helper.time.sleep')
+    @mock.patch("cloudinit.url_helper.time.sleep")
     def test_include(self, mock_sleep):
         """Test #include."""
-        included_url = 'http://hostname/path'
-        included_data = '#cloud-config\nincluded: true\n'
+        included_url = "http://hostname/path"
+        included_data = "#cloud-config\nincluded: true\n"
         httpretty.register_uri(httpretty.GET, included_url, included_data)
 
-        blob = '#include\n%s\n' % included_url
+        blob = "#include\n%s\n" % included_url
 
         self.reRoot()
         ci = stages.Init()
@@ -646,20 +668,20 @@ class TestConsumeUserDataHttp(TestConsumeUserData, helpers.HttprettyTestCase):
         ci.consume_data()
         cc_contents = util.load_file(ci.paths.get_ipath("cloud_config"))
         cc = util.load_yaml(cc_contents)
-        self.assertTrue(cc.get('included'))
+        self.assertTrue(cc.get("included"))
 
-    @mock.patch('cloudinit.url_helper.time.sleep')
+    @mock.patch("cloudinit.url_helper.time.sleep")
     def test_include_bad_url(self, mock_sleep):
         """Test #include with a bad URL."""
-        bad_url = 'http://bad/forbidden'
-        bad_data = '#cloud-config\nbad: true\n'
+        bad_url = "http://bad/forbidden"
+        bad_data = "#cloud-config\nbad: true\n"
         httpretty.register_uri(httpretty.GET, bad_url, bad_data, status=403)
 
-        included_url = 'http://hostname/path'
-        included_data = '#cloud-config\nincluded: true\n'
+        included_url = "http://hostname/path"
+        included_data = "#cloud-config\nincluded: true\n"
         httpretty.register_uri(httpretty.GET, included_url, included_data)
 
-        blob = '#include\n%s\n%s' % (bad_url, included_url)
+        blob = "#include\n%s\n%s" % (bad_url, included_url)
 
         self.reRoot()
         ci = stages.Init()
@@ -667,26 +689,26 @@ class TestConsumeUserDataHttp(TestConsumeUserData, helpers.HttprettyTestCase):
         ci.fetch()
         with self.assertRaises(Exception) as context:
             ci.consume_data()
-        self.assertIn('403', str(context.exception))
+        self.assertIn("403", str(context.exception))
 
         with self.assertRaises(FileNotFoundError):
             util.load_file(ci.paths.get_ipath("cloud_config"))
 
-    @mock.patch('cloudinit.url_helper.time.sleep')
+    @mock.patch("cloudinit.url_helper.time.sleep")
     @mock.patch(
         "cloudinit.user_data.features.ERROR_ON_USER_DATA_FAILURE", False
     )
     def test_include_bad_url_no_fail(self, mock_sleep):
         """Test #include with a bad URL and failure disabled"""
-        bad_url = 'http://bad/forbidden'
-        bad_data = '#cloud-config\nbad: true\n'
+        bad_url = "http://bad/forbidden"
+        bad_data = "#cloud-config\nbad: true\n"
         httpretty.register_uri(httpretty.GET, bad_url, bad_data, status=403)
 
-        included_url = 'http://hostname/path'
-        included_data = '#cloud-config\nincluded: true\n'
+        included_url = "http://hostname/path"
+        included_data = "#cloud-config\nincluded: true\n"
         httpretty.register_uri(httpretty.GET, included_url, included_data)
 
-        blob = '#include\n%s\n%s' % (bad_url, included_url)
+        blob = "#include\n%s\n%s" % (bad_url, included_url)
 
         self.reRoot()
         ci = stages.Init()
@@ -695,32 +717,33 @@ class TestConsumeUserDataHttp(TestConsumeUserData, helpers.HttprettyTestCase):
         ci.fetch()
         ci.consume_data()
 
-        self.assertIn("403 Client Error: Forbidden for url: %s" % bad_url,
-                      log_file.getvalue())
+        self.assertIn(
+            "403 Client Error: Forbidden for url: %s" % bad_url,
+            log_file.getvalue(),
+        )
 
         cc_contents = util.load_file(ci.paths.get_ipath("cloud_config"))
         cc = util.load_yaml(cc_contents)
-        self.assertIsNone(cc.get('bad'))
-        self.assertTrue(cc.get('included'))
+        self.assertIsNone(cc.get("bad"))
+        self.assertTrue(cc.get("included"))
 
 
 class TestUDProcess(helpers.ResourceUsingTestCase):
-
     def test_bytes_in_userdata(self):
-        msg = b'#cloud-config\napt_update: True\n'
+        msg = b"#cloud-config\napt_update: True\n"
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(msg)
         self.assertTrue(count_messages(message) == 1)
 
     def test_string_in_userdata(self):
-        msg = '#cloud-config\napt_update: True\n'
+        msg = "#cloud-config\napt_update: True\n"
 
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(msg)
         self.assertTrue(count_messages(message) == 1)
 
     def test_compressed_in_userdata(self):
-        msg = gzip_text('#cloud-config\napt_update: True\n')
+        msg = gzip_text("#cloud-config\napt_update: True\n")
 
         ud_proc = ud.UserDataProcessor(self.getCloudPaths())
         message = ud_proc.process(msg)
@@ -728,15 +751,14 @@ class TestUDProcess(helpers.ResourceUsingTestCase):
 
 
 class TestConvertString(helpers.TestCase):
-
     def test_handles_binary_non_utf8_decodable(self):
         """Printable unicode (not utf8-decodable) is safely converted."""
-        blob = b'#!/bin/bash\necho \xc3\x84\n'
+        blob = b"#!/bin/bash\necho \xc3\x84\n"
         msg = ud.convert_string(blob)
         self.assertEqual(blob, msg.get_payload(decode=True))
 
     def test_handles_binary_utf8_decodable(self):
-        blob = b'\x32\x32'
+        blob = b"\x32\x32"
         msg = ud.convert_string(blob)
         self.assertEqual(blob, msg.get_payload(decode=True))
 
@@ -756,24 +778,31 @@ class TestConvertString(helpers.TestCase):
 class TestFetchBaseConfig(helpers.TestCase):
     def test_only_builtin_gets_builtin(self):
         ret = helpers.wrap_and_call(
-            'cloudinit.stages',
-            {'util.read_conf_with_confd': None,
-             'util.read_conf_from_cmdline': None,
-             'read_runtime_config': {'return_value': {}}},
-            stages.fetch_base_config)
+            "cloudinit.stages",
+            {
+                "util.read_conf_with_confd": None,
+                "util.read_conf_from_cmdline": None,
+                "read_runtime_config": {"return_value": {}},
+            },
+            stages.fetch_base_config,
+        )
         self.assertEqual(util.get_builtin_cfg(), ret)
 
     def test_conf_d_overrides_defaults(self):
         builtin = util.get_builtin_cfg()
         test_key = sorted(builtin)[0]
-        test_value = 'test'
+        test_value = "test"
         ret = helpers.wrap_and_call(
-            'cloudinit.stages',
-            {'util.read_conf_with_confd':
-                {'return_value': {test_key: test_value}},
-             'util.read_conf_from_cmdline': None,
-             'read_runtime_config': {'return_value': {}}},
-            stages.fetch_base_config)
+            "cloudinit.stages",
+            {
+                "util.read_conf_with_confd": {
+                    "return_value": {test_key: test_value}
+                },
+                "util.read_conf_from_cmdline": None,
+                "read_runtime_config": {"return_value": {}},
+            },
+            stages.fetch_base_config,
+        )
         self.assertEqual(ret.get(test_key), test_value)
         builtin[test_key] = test_value
         self.assertEqual(ret, builtin)
@@ -781,47 +810,64 @@ class TestFetchBaseConfig(helpers.TestCase):
     def test_cmdline_overrides_defaults(self):
         builtin = util.get_builtin_cfg()
         test_key = sorted(builtin)[0]
-        test_value = 'test'
+        test_value = "test"
         cmdline = {test_key: test_value}
         ret = helpers.wrap_and_call(
-            'cloudinit.stages',
-            {'util.read_conf_from_cmdline': {'return_value': cmdline},
-             'util.read_conf_with_confd': None,
-             'read_runtime_config': None},
-            stages.fetch_base_config)
+            "cloudinit.stages",
+            {
+                "util.read_conf_from_cmdline": {"return_value": cmdline},
+                "util.read_conf_with_confd": None,
+                "read_runtime_config": None,
+            },
+            stages.fetch_base_config,
+        )
         self.assertEqual(ret.get(test_key), test_value)
         builtin[test_key] = test_value
         self.assertEqual(ret, builtin)
 
     def test_cmdline_overrides_confd_runtime_and_defaults(self):
-        builtin = {'key1': 'value0', 'key3': 'other2'}
-        conf_d = {'key1': 'value1', 'key2': 'other1'}
-        cmdline = {'key3': 'other3', 'key2': 'other2'}
-        runtime = {'key3': 'runtime3'}
+        builtin = {"key1": "value0", "key3": "other2"}
+        conf_d = {"key1": "value1", "key2": "other1"}
+        cmdline = {"key3": "other3", "key2": "other2"}
+        runtime = {"key3": "runtime3"}
         ret = helpers.wrap_and_call(
-            'cloudinit.stages',
-            {'util.read_conf_with_confd': {'return_value': conf_d},
-             'util.get_builtin_cfg': {'return_value': builtin},
-             'read_runtime_config': {'return_value': runtime},
-             'util.read_conf_from_cmdline': {'return_value': cmdline}},
-            stages.fetch_base_config)
-        self.assertEqual(ret, {'key1': 'value1', 'key2': 'other2',
-                               'key3': 'other3'})
+            "cloudinit.stages",
+            {
+                "util.read_conf_with_confd": {"return_value": conf_d},
+                "util.get_builtin_cfg": {"return_value": builtin},
+                "read_runtime_config": {"return_value": runtime},
+                "util.read_conf_from_cmdline": {"return_value": cmdline},
+            },
+            stages.fetch_base_config,
+        )
+        self.assertEqual(
+            ret, {"key1": "value1", "key2": "other2", "key3": "other3"}
+        )
 
     def test_order_precedence_is_builtin_system_runtime_cmdline(self):
-        builtin = {'key1': 'builtin0', 'key3': 'builtin3'}
-        conf_d = {'key1': 'confd1', 'key2': 'confd2', 'keyconfd1': 'kconfd1'}
-        runtime = {'key1': 'runtime1', 'key2': 'runtime2'}
-        cmdline = {'key1': 'cmdline1'}
+        builtin = {"key1": "builtin0", "key3": "builtin3"}
+        conf_d = {"key1": "confd1", "key2": "confd2", "keyconfd1": "kconfd1"}
+        runtime = {"key1": "runtime1", "key2": "runtime2"}
+        cmdline = {"key1": "cmdline1"}
         ret = helpers.wrap_and_call(
-            'cloudinit.stages',
-            {'util.read_conf_with_confd': {'return_value': conf_d},
-             'util.get_builtin_cfg': {'return_value': builtin},
-             'util.read_conf_from_cmdline': {'return_value': cmdline},
-             'read_runtime_config': {'return_value': runtime},
-             },
-            stages.fetch_base_config)
-        self.assertEqual(ret, {'key1': 'cmdline1', 'key2': 'runtime2',
-                               'key3': 'builtin3', 'keyconfd1': 'kconfd1'})
+            "cloudinit.stages",
+            {
+                "util.read_conf_with_confd": {"return_value": conf_d},
+                "util.get_builtin_cfg": {"return_value": builtin},
+                "util.read_conf_from_cmdline": {"return_value": cmdline},
+                "read_runtime_config": {"return_value": runtime},
+            },
+            stages.fetch_base_config,
+        )
+        self.assertEqual(
+            ret,
+            {
+                "key1": "cmdline1",
+                "key2": "runtime2",
+                "key3": "builtin3",
+                "keyconfd1": "kconfd1",
+            },
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_dhclient_hook.py b/tests/unittests/test_dhclient_hook.py
index 14549111..7e5b54c0 100644
--- a/tests/unittests/test_dhclient_hook.py
+++ b/tests/unittests/test_dhclient_hook.py
@@ -2,47 +2,48 @@
 
 """Tests for cloudinit.dhclient_hook."""
 
-from cloudinit import dhclient_hook as dhc
-from tests.unittests.helpers import CiTestCase, dir2dict, populate_dir
-
 import argparse
 import json
 import os
 from unittest import mock
 
+from cloudinit import dhclient_hook as dhc
+from tests.unittests.helpers import CiTestCase, dir2dict, populate_dir
+
 
 class TestDhclientHook(CiTestCase):
 
     ex_env = {
-        'interface': 'eth0',
-        'new_dhcp_lease_time': '3600',
-        'new_host_name': 'x1',
-        'new_ip_address': '10.145.210.163',
-        'new_subnet_mask': '255.255.255.0',
-        'old_host_name': 'x1',
-        'PATH': '/usr/sbin:/usr/bin:/sbin:/bin',
-        'pid': '614',
-        'reason': 'BOUND',
+        "interface": "eth0",
+        "new_dhcp_lease_time": "3600",
+        "new_host_name": "x1",
+        "new_ip_address": "10.145.210.163",
+        "new_subnet_mask": "255.255.255.0",
+        "old_host_name": "x1",
+        "PATH": "/usr/sbin:/usr/bin:/sbin:/bin",
+        "pid": "614",
+        "reason": "BOUND",
     }
 
     # some older versions of dhclient put the same content,
     # but in upper case with DHCP4_ instead of new_
     ex_env_dhcp4 = {
-        'REASON': 'BOUND',
-        'DHCP4_dhcp_lease_time': '3600',
-        'DHCP4_host_name': 'x1',
-        'DHCP4_ip_address': '10.145.210.163',
-        'DHCP4_subnet_mask': '255.255.255.0',
-        'INTERFACE': 'eth0',
-        'PATH': '/usr/sbin:/usr/bin:/sbin:/bin',
-        'pid': '614',
+        "REASON": "BOUND",
+        "DHCP4_dhcp_lease_time": "3600",
+        "DHCP4_host_name": "x1",
+        "DHCP4_ip_address": "10.145.210.163",
+        "DHCP4_subnet_mask": "255.255.255.0",
+        "INTERFACE": "eth0",
+        "PATH": "/usr/sbin:/usr/bin:/sbin:/bin",
+        "pid": "614",
     }
 
     expected = {
-        'dhcp_lease_time': '3600',
-        'host_name': 'x1',
-        'ip_address': '10.145.210.163',
-        'subnet_mask': '255.255.255.0'}
+        "dhcp_lease_time": "3600",
+        "host_name": "x1",
+        "ip_address": "10.145.210.163",
+        "subnet_mask": "255.255.255.0",
+    }
 
     def setUp(self):
         super(TestDhclientHook, self).setUp()
@@ -50,7 +51,7 @@ class TestDhclientHook(CiTestCase):
 
     def test_handle_args(self):
         """quick test of call to handle_args."""
-        nic = 'eth0'
+        nic = "eth0"
         args = argparse.Namespace(event=dhc.UP, interface=nic)
         with mock.patch.dict("os.environ", clear=True, values=self.ex_env):
             dhc.handle_args(dhc.NAME, args, data_d=self.tmp)
@@ -61,45 +62,51 @@ class TestDhclientHook(CiTestCase):
     def test_run_hook_up_creates_dir(self):
         """If dir does not exist, run_hook should create it."""
         subd = self.tmp_path("subdir", self.tmp)
-        nic = 'eth1'
-        dhc.run_hook(nic, 'up', data_d=subd, env=self.ex_env)
+        nic = "eth1"
+        dhc.run_hook(nic, "up", data_d=subd, env=self.ex_env)
         self.assertEqual(
-            set([nic + ".json"]), set(dir2dict(subd + os.path.sep)))
+            set([nic + ".json"]), set(dir2dict(subd + os.path.sep))
+        )
 
     def test_run_hook_up(self):
         """Test expected use of run_hook_up."""
-        nic = 'eth0'
-        dhc.run_hook(nic, 'up', data_d=self.tmp, env=self.ex_env)
+        nic = "eth0"
+        dhc.run_hook(nic, "up", data_d=self.tmp, env=self.ex_env)
         found = dir2dict(self.tmp + os.path.sep)
         self.assertEqual([nic + ".json"], list(found.keys()))
         self.assertEqual(self.expected, json.loads(found[nic + ".json"]))
 
     def test_run_hook_up_dhcp4_prefix(self):
         """Test run_hook filters correctly with older DHCP4_ data."""
-        nic = 'eth0'
-        dhc.run_hook(nic, 'up', data_d=self.tmp, env=self.ex_env_dhcp4)
+        nic = "eth0"
+        dhc.run_hook(nic, "up", data_d=self.tmp, env=self.ex_env_dhcp4)
         found = dir2dict(self.tmp + os.path.sep)
         self.assertEqual([nic + ".json"], list(found.keys()))
         self.assertEqual(self.expected, json.loads(found[nic + ".json"]))
 
     def test_run_hook_down_deletes(self):
         """down should delete the created json file."""
-        nic = 'eth1'
+        nic = "eth1"
         populate_dir(
-            self.tmp, {nic + ".json": "{'abcd'}", 'myfile.txt': 'text'})
-        dhc.run_hook(nic, 'down', data_d=self.tmp, env={'old_host_name': 'x1'})
+            self.tmp, {nic + ".json": "{'abcd'}", "myfile.txt": "text"}
+        )
+        dhc.run_hook(nic, "down", data_d=self.tmp, env={"old_host_name": "x1"})
         self.assertEqual(
-            set(['myfile.txt']),
-            set(dir2dict(self.tmp + os.path.sep)))
+            set(["myfile.txt"]), set(dir2dict(self.tmp + os.path.sep))
+        )
 
     def test_get_parser(self):
         """Smoke test creation of get_parser."""
         # cloud-init main uses 'action'.
-        event, interface = (dhc.UP, 'mynic0')
+        event, interface = (dhc.UP, "mynic0")
         self.assertEqual(
-            argparse.Namespace(event=event, interface=interface,
-                               action=(dhc.NAME, dhc.handle_args)),
-            dhc.get_parser().parse_args([event, interface]))
+            argparse.Namespace(
+                event=event,
+                interface=interface,
+                action=(dhc.NAME, dhc.handle_args),
+            ),
+            dhc.get_parser().parse_args([event, interface]),
+        )
 
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_dmi.py b/tests/unittests/test_dmi.py
index 674e7b98..6c28724a 100644
--- a/tests/unittests/test_dmi.py
+++ b/tests/unittests/test_dmi.py
@@ -1,16 +1,13 @@
-from tests.unittests import helpers
-from cloudinit import dmi
-from cloudinit import util
-from cloudinit import subp
-
 import os
-import tempfile
 import shutil
+import tempfile
 from unittest import mock
 
+from cloudinit import dmi, subp, util
+from tests.unittests import helpers
 
-class TestReadDMIData(helpers.FilesystemMockingTestCase):
 
+class TestReadDMIData(helpers.FilesystemMockingTestCase):
     def setUp(self):
         super(TestReadDMIData, self).setUp()
         self.new_root = tempfile.mkdtemp()
@@ -24,7 +21,7 @@ class TestReadDMIData(helpers.FilesystemMockingTestCase):
         self._m_is_FreeBSD = p.start()
 
     def _create_sysfs_parent_directory(self):
-        util.ensure_dir(os.path.join('sys', 'class', 'dmi', 'id'))
+        util.ensure_dir(os.path.join("sys", "class", "dmi", "id"))
 
     def _create_sysfs_file(self, key, content):
         """Mocks the sys path found on Linux systems."""
@@ -37,92 +34,109 @@ class TestReadDMIData(helpers.FilesystemMockingTestCase):
         In order to test a missing sys path and call outs to dmidecode, this
         function fakes the results of dmidecode to test the results.
         """
+
         def _dmidecode_subp(cmd):
             if cmd[-1] != key:
                 raise subp.ProcessExecutionError()
             return (content, error)
 
         self.patched_funcs.enter_context(
-            mock.patch("cloudinit.dmi.subp.which", side_effect=lambda _: True))
+            mock.patch("cloudinit.dmi.subp.which", side_effect=lambda _: True)
+        )
         self.patched_funcs.enter_context(
-            mock.patch("cloudinit.dmi.subp.subp", side_effect=_dmidecode_subp))
+            mock.patch("cloudinit.dmi.subp.subp", side_effect=_dmidecode_subp)
+        )
 
     def _configure_kenv_return(self, key, content, error=None):
         """
         In order to test a FreeBSD system call outs to kenv, this
         function fakes the results of kenv to test the results.
         """
+
         def _kenv_subp(cmd):
             if cmd[-1] != dmi.DMIDECODE_TO_KERNEL[key].freebsd:
                 raise subp.ProcessExecutionError()
             return (content, error)
 
         self.patched_funcs.enter_context(
-            mock.patch("cloudinit.dmi.subp.subp", side_effect=_kenv_subp))
+            mock.patch("cloudinit.dmi.subp.subp", side_effect=_kenv_subp)
+        )
 
     def patch_mapping(self, new_mapping):
         self.patched_funcs.enter_context(
-            mock.patch('cloudinit.dmi.DMIDECODE_TO_KERNEL',
-                       new_mapping))
+            mock.patch("cloudinit.dmi.DMIDECODE_TO_KERNEL", new_mapping)
+        )
 
     def test_sysfs_used_with_key_in_mapping_and_file_on_disk(self):
-        self.patch_mapping({'mapped-key': dmi.kdmi('mapped-value', None)})
-        expected_dmi_value = 'sys-used-correctly'
-        self._create_sysfs_file('mapped-value', expected_dmi_value)
-        self._configure_dmidecode_return('mapped-key', 'wrong-wrong-wrong')
-        self.assertEqual(expected_dmi_value, dmi.read_dmi_data('mapped-key'))
+        self.patch_mapping({"mapped-key": dmi.kdmi("mapped-value", None)})
+        expected_dmi_value = "sys-used-correctly"
+        self._create_sysfs_file("mapped-value", expected_dmi_value)
+        self._configure_dmidecode_return("mapped-key", "wrong-wrong-wrong")
+        self.assertEqual(expected_dmi_value, dmi.read_dmi_data("mapped-key"))
 
     def test_dmidecode_used_if_no_sysfs_file_on_disk(self):
         self.patch_mapping({})
         self._create_sysfs_parent_directory()
-        expected_dmi_value = 'dmidecode-used'
-        self._configure_dmidecode_return('use-dmidecode', expected_dmi_value)
+        expected_dmi_value = "dmidecode-used"
+        self._configure_dmidecode_return("use-dmidecode", expected_dmi_value)
         with mock.patch("cloudinit.util.os.uname") as m_uname:
-            m_uname.return_value = ('x-sysname', 'x-nodename',
-                                    'x-release', 'x-version', 'x86_64')
-            self.assertEqual(expected_dmi_value,
-                             dmi.read_dmi_data('use-dmidecode'))
+            m_uname.return_value = (
+                "x-sysname",
+                "x-nodename",
+                "x-release",
+                "x-version",
+                "x86_64",
+            )
+            self.assertEqual(
+                expected_dmi_value, dmi.read_dmi_data("use-dmidecode")
+            )
 
     def test_dmidecode_not_used_on_arm(self):
         self.patch_mapping({})
         print("current =%s", subp)
         self._create_sysfs_parent_directory()
-        dmi_val = 'from-dmidecode'
-        dmi_name = 'use-dmidecode'
+        dmi_val = "from-dmidecode"
+        dmi_name = "use-dmidecode"
         self._configure_dmidecode_return(dmi_name, dmi_val)
         print("now =%s", subp)
 
-        expected = {'armel': None, 'aarch64': dmi_val, 'x86_64': dmi_val}
+        expected = {"armel": None, "aarch64": dmi_val, "x86_64": dmi_val}
         found = {}
         # we do not run the 'dmi-decode' binary on some arches
         # verify that anything requested that is not in the sysfs dir
         # will return None on those arches.
         with mock.patch("cloudinit.util.os.uname") as m_uname:
             for arch in expected:
-                m_uname.return_value = ('x-sysname', 'x-nodename',
-                                        'x-release', 'x-version', arch)
+                m_uname.return_value = (
+                    "x-sysname",
+                    "x-nodename",
+                    "x-release",
+                    "x-version",
+                    arch,
+                )
                 print("now2 =%s", subp)
                 found[arch] = dmi.read_dmi_data(dmi_name)
         self.assertEqual(expected, found)
 
     def test_none_returned_if_neither_source_has_data(self):
         self.patch_mapping({})
-        self._configure_dmidecode_return('key', 'value')
-        self.assertIsNone(dmi.read_dmi_data('expect-fail'))
+        self._configure_dmidecode_return("key", "value")
+        self.assertIsNone(dmi.read_dmi_data("expect-fail"))
 
     def test_none_returned_if_dmidecode_not_in_path(self):
         self.patched_funcs.enter_context(
-            mock.patch.object(subp, 'which', lambda _: False))
+            mock.patch.object(subp, "which", lambda _: False)
+        )
         self.patch_mapping({})
-        self.assertIsNone(dmi.read_dmi_data('expect-fail'))
+        self.assertIsNone(dmi.read_dmi_data("expect-fail"))
 
     def test_empty_string_returned_instead_of_foxfox(self):
         # uninitialized dmi values show as \xff, return empty string
         my_len = 32
-        dmi_value = b'\xff' * my_len + b'\n'
+        dmi_value = b"\xff" * my_len + b"\n"
         expected = ""
-        dmi_key = 'system-product-name'
-        sysfs_key = 'product_name'
+        dmi_key = "system-product-name"
+        sysfs_key = "product_name"
         self._create_sysfs_file(sysfs_key, dmi_value)
         self.assertEqual(expected, dmi.read_dmi_data(dmi_key))
 
@@ -132,7 +146,7 @@ class TestReadDMIData(helpers.FilesystemMockingTestCase):
         # first verify we get the value if not in container
         self._m_is_container.return_value = False
         key, val = ("system-product-name", "my_product")
-        self._create_sysfs_file('product_name', val)
+        self._create_sysfs_file("product_name", val)
         self.assertEqual(val, dmi.read_dmi_data(key))
 
         # then verify in container returns None
@@ -142,7 +156,7 @@ class TestReadDMIData(helpers.FilesystemMockingTestCase):
     def test_container_returns_none_on_unknown(self):
         """In a container even bogus keys return None."""
         self._m_is_container.return_value = True
-        self._create_sysfs_file('product_name', "should-be-ignored")
+        self._create_sysfs_file("product_name", "should-be-ignored")
         self.assertIsNone(dmi.read_dmi_data("bogus"))
         self.assertIsNone(dmi.read_dmi_data("system-product-name"))
 
diff --git a/tests/unittests/test_ds_identify.py b/tests/unittests/test_ds_identify.py
index eb8992d9..f2d2b494 100644
--- a/tests/unittests/test_ds_identify.py
+++ b/tests/unittests/test_ds_identify.py
@@ -1,31 +1,34 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from collections import namedtuple
 import copy
 import os
+from collections import namedtuple
 from uuid import uuid4
 
-from cloudinit import safeyaml
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import safeyaml, subp, util
+from cloudinit.sources import DataSourceIBMCloud as ds_ibm
+from cloudinit.sources import DataSourceOracle as ds_oracle
+from cloudinit.sources import DataSourceSmartOS as ds_smartos
 from tests.unittests.helpers import (
     CiTestCase,
+    cloud_init_project_dir,
     dir2dict,
     populate_dir,
     populate_dir_with_ts,
-    cloud_init_project_dir,
 )
-from cloudinit.sources import DataSourceIBMCloud as ds_ibm
-from cloudinit.sources import DataSourceSmartOS as ds_smartos
-from cloudinit.sources import DataSourceOracle as ds_oracle
 
-UNAME_MYSYS = ("Linux bart 4.4.0-62-generic #83-Ubuntu "
-               "SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 GNU/Linux")
-UNAME_PPC64EL = ("Linux diamond 4.4.0-83-generic #106-Ubuntu SMP "
-                 "Mon Jun 26 17:53:54 UTC 2017 "
-                 "ppc64le ppc64le ppc64le GNU/Linux")
-UNAME_FREEBSD = ("FreeBSD fbsd12-1 12.1-RELEASE-p10 "
-                 "FreeBSD 12.1-RELEASE-p10 GENERIC  amd64")
+UNAME_MYSYS = (
+    "Linux bart 4.4.0-62-generic #83-Ubuntu "
+    "SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 GNU/Linux"
+)
+UNAME_PPC64EL = (
+    "Linux diamond 4.4.0-83-generic #106-Ubuntu SMP "
+    "Mon Jun 26 17:53:54 UTC 2017 "
+    "ppc64le ppc64le ppc64le GNU/Linux"
+)
+UNAME_FREEBSD = (
+    "FreeBSD fbsd12-1 12.1-RELEASE-p10 FreeBSD 12.1-RELEASE-p10 GENERIC  amd64"
+)
 
 BLKID_EFI_ROOT = """
 DEVNAME=/dev/sda1
@@ -41,10 +44,16 @@ PARTUUID=30c65c77-e07d-4039-b2fb-88b1fb5fa1fc
 
 # this is a Ubuntu 18.04 disk.img output (dual uefi and bios bootable)
 BLKID_UEFI_UBUNTU = [
-    {'DEVNAME': 'vda1', 'TYPE': 'ext4', 'PARTUUID': uuid4(), 'UUID': uuid4()},
-    {'DEVNAME': 'vda14', 'PARTUUID': uuid4()},
-    {'DEVNAME': 'vda15', 'TYPE': 'vfat', 'LABEL': 'UEFI', 'PARTUUID': uuid4(),
-     'UUID': '5F55-129B'}]
+    {"DEVNAME": "vda1", "TYPE": "ext4", "PARTUUID": uuid4(), "UUID": uuid4()},
+    {"DEVNAME": "vda14", "PARTUUID": uuid4()},
+    {
+        "DEVNAME": "vda15",
+        "TYPE": "vfat",
+        "LABEL": "UEFI",
+        "PARTUUID": uuid4(),
+        "UUID": "5F55-129B",
+    },
+]
 
 
 POLICY_FOUND_ONLY = "search,found=all,maybe=none,notfound=disabled"
@@ -52,7 +61,7 @@ POLICY_FOUND_OR_MAYBE = "search,found=all,maybe=all,notfound=disabled"
 DI_DEFAULT_POLICY = "search,found=all,maybe=all,notfound=disabled"
 DI_DEFAULT_POLICY_NO_DMI = "search,found=all,maybe=all,notfound=enabled"
 DI_EC2_STRICT_ID_DEFAULT = "true"
-OVF_MATCH_STRING = 'http://schemas.dmtf.org/ovf/environment/1'
+OVF_MATCH_STRING = "http://schemas.dmtf.org/ovf/environment/1"
 
 SHELL_MOCK_TMPL = """\
 %(name)s() {
@@ -66,7 +75,7 @@ SHELL_MOCK_TMPL = """\
 
 RC_FOUND = 0
 RC_NOT_FOUND = 1
-DS_NONE = 'None'
+DS_NONE = "None"
 
 P_CHASSIS_ASSET_TAG = "sys/class/dmi/id/chassis_asset_tag"
 P_PRODUCT_NAME = "sys/class/dmi/id/product_name"
@@ -78,31 +87,42 @@ P_DSID_CFG = "etc/cloud/ds-identify.cfg"
 
 IBM_CONFIG_UUID = "9796-932E"
 
-MOCK_VIRT_IS_CONTAINER_OTHER = {'name': 'detect_virt',
-                                'RET': 'container-other', 'ret': 0}
-MOCK_VIRT_IS_KVM = {'name': 'detect_virt', 'RET': 'kvm', 'ret': 0}
-MOCK_VIRT_IS_VMWARE = {'name': 'detect_virt', 'RET': 'vmware', 'ret': 0}
+MOCK_VIRT_IS_CONTAINER_OTHER = {
+    "name": "detect_virt",
+    "RET": "container-other",
+    "ret": 0,
+}
+MOCK_VIRT_IS_KVM = {"name": "detect_virt", "RET": "kvm", "ret": 0}
+MOCK_VIRT_IS_VMWARE = {"name": "detect_virt", "RET": "vmware", "ret": 0}
 # currenty' SmartOS hypervisor "bhyve" is unknown by systemd-detect-virt.
-MOCK_VIRT_IS_VM_OTHER = {'name': 'detect_virt', 'RET': 'vm-other', 'ret': 0}
-MOCK_VIRT_IS_XEN = {'name': 'detect_virt', 'RET': 'xen', 'ret': 0}
-MOCK_UNAME_IS_PPC64 = {'name': 'uname', 'out': UNAME_PPC64EL, 'ret': 0}
-MOCK_UNAME_IS_FREEBSD = {'name': 'uname', 'out': UNAME_FREEBSD, 'ret': 0}
+MOCK_VIRT_IS_VM_OTHER = {"name": "detect_virt", "RET": "vm-other", "ret": 0}
+MOCK_VIRT_IS_XEN = {"name": "detect_virt", "RET": "xen", "ret": 0}
+MOCK_UNAME_IS_PPC64 = {"name": "uname", "out": UNAME_PPC64EL, "ret": 0}
+MOCK_UNAME_IS_FREEBSD = {"name": "uname", "out": UNAME_FREEBSD, "ret": 0}
 
 shell_true = 0
 shell_false = 1
 
-CallReturn = namedtuple('CallReturn',
-                        ['rc', 'stdout', 'stderr', 'cfg', 'files'])
+CallReturn = namedtuple(
+    "CallReturn", ["rc", "stdout", "stderr", "cfg", "files"]
+)
 
 
 class DsIdentifyBase(CiTestCase):
-    dsid_path = cloud_init_project_dir('tools/ds-identify')
-    allowed_subp = ['sh']
-
-    def call(self, rootd=None, mocks=None, func="main", args=None, files=None,
-             policy_dmi=DI_DEFAULT_POLICY,
-             policy_no_dmi=DI_DEFAULT_POLICY_NO_DMI,
-             ec2_strict_id=DI_EC2_STRICT_ID_DEFAULT):
+    dsid_path = cloud_init_project_dir("tools/ds-identify")
+    allowed_subp = ["sh"]
+
+    def call(
+        self,
+        rootd=None,
+        mocks=None,
+        func="main",
+        args=None,
+        files=None,
+        policy_dmi=DI_DEFAULT_POLICY,
+        policy_no_dmi=DI_DEFAULT_POLICY_NO_DMI,
+        ec2_strict_id=DI_EC2_STRICT_ID_DEFAULT,
+    ):
         if args is None:
             args = []
         if mocks is None:
@@ -114,7 +134,7 @@ class DsIdentifyBase(CiTestCase):
         if rootd is None:
             rootd = self.tmp_dir()
 
-        unset = '_unset'
+        unset = "_unset"
         wrap = self.tmp_path(path="_shwrap", dir=rootd)
         populate_dir(rootd, files)
 
@@ -130,11 +150,11 @@ class DsIdentifyBase(CiTestCase):
             'DI_DEFAULT_POLICY="%s"' % policy_dmi,
             'DI_DEFAULT_POLICY_NO_DMI="%s"' % policy_no_dmi,
             'DI_EC2_STRICT_ID_DEFAULT="%s"' % ec2_strict_id,
-            ""
+            "",
         ]
 
         def write_mock(data):
-            ddata = {'out': None, 'err': None, 'ret': 0, 'RET': None}
+            ddata = {"out": None, "err": None, "ret": 0, "RET": None}
             ddata.update(data)
             for k in ddata:
                 if ddata[k] is None:
@@ -143,56 +163,68 @@ class DsIdentifyBase(CiTestCase):
 
         mocklines = []
         defaults = [
-            {'name': 'detect_virt', 'RET': 'none', 'ret': 1},
-            {'name': 'uname', 'out': UNAME_MYSYS},
-            {'name': 'blkid', 'out': BLKID_EFI_ROOT},
-            {'name': 'ovf_vmware_transport_guestinfo',
-             'out': 'No value found', 'ret': 1},
-            {'name': 'dmi_decode', 'ret': 1,
-             'err': 'No dmidecode program. ERROR.'},
-            {'name': 'get_kenv_field', 'ret': 1,
-             'err': 'No kenv program. ERROR.'},
+            {"name": "detect_virt", "RET": "none", "ret": 1},
+            {"name": "uname", "out": UNAME_MYSYS},
+            {"name": "blkid", "out": BLKID_EFI_ROOT},
+            {
+                "name": "ovf_vmware_transport_guestinfo",
+                "out": "No value found",
+                "ret": 1,
+            },
+            {
+                "name": "dmi_decode",
+                "ret": 1,
+                "err": "No dmidecode program. ERROR.",
+            },
+            {
+                "name": "get_kenv_field",
+                "ret": 1,
+                "err": "No kenv program. ERROR.",
+            },
         ]
 
-        written = [d['name'] for d in mocks]
+        written = [d["name"] for d in mocks]
         for data in mocks:
             mocklines.append(write_mock(data))
         for d in defaults:
-            if d['name'] not in written:
+            if d["name"] not in written:
                 mocklines.append(write_mock(d))
 
-        endlines = [
-            func + ' ' + ' '.join(['"%s"' % s for s in args])
-        ]
+        endlines = [func + " " + " ".join(['"%s"' % s for s in args])]
 
         with open(wrap, "w") as fp:
-            fp.write('\n'.join(head + mocklines + endlines) + "\n")
+            fp.write("\n".join(head + mocklines + endlines) + "\n")
 
         rc = 0
         try:
-            out, err = subp.subp(['sh', '-c', '. %s' % wrap], capture=True)
+            out, err = subp.subp(["sh", "-c", ". %s" % wrap], capture=True)
         except subp.ProcessExecutionError as e:
             rc = e.exit_code
             out = e.stdout
             err = e.stderr
 
         cfg = None
-        cfg_out = os.path.join(rootd, 'run/cloud-init/cloud.cfg')
+        cfg_out = os.path.join(rootd, "run/cloud-init/cloud.cfg")
         if os.path.exists(cfg_out):
             contents = util.load_file(cfg_out)
             try:
                 cfg = safeyaml.load(contents)
             except Exception as e:
-                cfg = {"_INVALID_YAML": contents,
-                       "_EXCEPTION": str(e)}
+                cfg = {"_INVALID_YAML": contents, "_EXCEPTION": str(e)}
 
         return CallReturn(rc, out, err, cfg, dir2dict(rootd))
 
     def _call_via_dict(self, data, rootd=None, **kwargs):
         # return output of self.call with a dict input like VALID_CFG[item]
-        xwargs = {'rootd': rootd}
-        passthrough = ('mocks', 'func', 'args', 'policy_dmi',
-                       'policy_no_dmi', 'files')
+        xwargs = {"rootd": rootd}
+        passthrough = (
+            "mocks",
+            "func",
+            "args",
+            "policy_dmi",
+            "policy_no_dmi",
+            "files",
+        )
         for k in passthrough:
             if k in data:
                 xwargs[k] = data[k]
@@ -204,7 +236,8 @@ class DsIdentifyBase(CiTestCase):
     def _test_ds_found(self, name):
         data = copy.deepcopy(VALID_CFG[name])
         return self._check_via_dict(
-            data, RC_FOUND, dslist=[data.get('ds'), DS_NONE])
+            data, RC_FOUND, dslist=[data.get("ds"), DS_NONE]
+        )
 
     def _test_ds_not_found(self, name):
         data = copy.deepcopy(VALID_CFG[name])
@@ -216,87 +249,104 @@ class DsIdentifyBase(CiTestCase):
         try:
             self.assertEqual(rc, ret.rc)
             if dslist is not None:
-                self.assertEqual(dslist, ret.cfg['datasource_list'])
+                self.assertEqual(dslist, ret.cfg["datasource_list"])
             good = True
         finally:
             if not good:
-                _print_run_output(ret.rc, ret.stdout, ret.stderr, ret.cfg,
-                                  ret.files)
+                _print_run_output(
+                    ret.rc, ret.stdout, ret.stderr, ret.cfg, ret.files
+                )
         return ret
 
 
 class TestDsIdentify(DsIdentifyBase):
     def test_wb_print_variables(self):
         """_print_info reports an array of discovered variables to stderr."""
-        data = VALID_CFG['Azure-dmi-detection']
+        data = VALID_CFG["Azure-dmi-detection"]
         _, _, err, _, _ = self._call_via_dict(data)
         expected_vars = [
-            'DMI_PRODUCT_NAME', 'DMI_SYS_VENDOR', 'DMI_PRODUCT_SERIAL',
-            'DMI_PRODUCT_UUID', 'PID_1_PRODUCT_NAME', 'DMI_CHASSIS_ASSET_TAG',
-            'FS_LABELS', 'KERNEL_CMDLINE', 'VIRT', 'UNAME_KERNEL_NAME',
-            'UNAME_KERNEL_RELEASE', 'UNAME_KERNEL_VERSION', 'UNAME_MACHINE',
-            'UNAME_NODENAME', 'UNAME_OPERATING_SYSTEM', 'DSNAME', 'DSLIST',
-            'MODE', 'ON_FOUND', 'ON_MAYBE', 'ON_NOTFOUND']
+            "DMI_PRODUCT_NAME",
+            "DMI_SYS_VENDOR",
+            "DMI_PRODUCT_SERIAL",
+            "DMI_PRODUCT_UUID",
+            "PID_1_PRODUCT_NAME",
+            "DMI_CHASSIS_ASSET_TAG",
+            "FS_LABELS",
+            "KERNEL_CMDLINE",
+            "VIRT",
+            "UNAME_KERNEL_NAME",
+            "UNAME_KERNEL_RELEASE",
+            "UNAME_KERNEL_VERSION",
+            "UNAME_MACHINE",
+            "UNAME_NODENAME",
+            "UNAME_OPERATING_SYSTEM",
+            "DSNAME",
+            "DSLIST",
+            "MODE",
+            "ON_FOUND",
+            "ON_MAYBE",
+            "ON_NOTFOUND",
+        ]
         for var in expected_vars:
-            self.assertIn('{0}='.format(var), err)
+            self.assertIn("{0}=".format(var), err)
 
     def test_azure_dmi_detection_from_chassis_asset_tag(self):
         """Azure datasource is detected from DMI chassis-asset-tag"""
-        self._test_ds_found('Azure-dmi-detection')
+        self._test_ds_found("Azure-dmi-detection")
 
     def test_azure_seed_file_detection(self):
         """Azure datasource is detected due to presence of a seed file.
 
         The seed file tested  is /var/lib/cloud/seed/azure/ovf-env.xml."""
-        self._test_ds_found('Azure-seed-detection')
+        self._test_ds_found("Azure-seed-detection")
 
     def test_aws_ec2_hvm(self):
         """EC2: hvm instances use dmi serial and uuid starting with 'ec2'."""
-        self._test_ds_found('Ec2-hvm')
+        self._test_ds_found("Ec2-hvm")
 
     def test_aws_ec2_xen(self):
         """EC2: sys/hypervisor/uuid starts with ec2."""
-        self._test_ds_found('Ec2-xen')
+        self._test_ds_found("Ec2-xen")
 
     def test_brightbox_is_ec2(self):
         """EC2: product_serial ends with '.brightbox.com'"""
-        self._test_ds_found('Ec2-brightbox')
+        self._test_ds_found("Ec2-brightbox")
 
     def test_bobrightbox_is_not_brightbox(self):
         """EC2: bobrightbox.com in product_serial is not brightbox'"""
-        self._test_ds_not_found('Ec2-brightbox-negative')
+        self._test_ds_not_found("Ec2-brightbox-negative")
 
     def test_freebsd_nocloud(self):
         """NoCloud identified on FreeBSD via label by geom."""
-        self._test_ds_found('NoCloud-fbsd')
+        self._test_ds_found("NoCloud-fbsd")
 
     def test_gce_by_product_name(self):
         """GCE identifies itself with product_name."""
-        self._test_ds_found('GCE')
+        self._test_ds_found("GCE")
 
     def test_gce_by_serial(self):
         """Older gce compute instances must be identified by serial."""
-        self._test_ds_found('GCE-serial')
+        self._test_ds_found("GCE-serial")
 
     def test_config_drive(self):
         """ConfigDrive datasource has a disk with LABEL=config-2."""
-        self._test_ds_found('ConfigDrive')
+        self._test_ds_found("ConfigDrive")
 
     def test_rbx_cloud(self):
         """Rbx datasource has a disk with LABEL=CLOUDMD."""
-        self._test_ds_found('RbxCloud')
+        self._test_ds_found("RbxCloud")
 
     def test_rbx_cloud_lower(self):
         """Rbx datasource has a disk with LABEL=cloudmd."""
-        self._test_ds_found('RbxCloudLower')
+        self._test_ds_found("RbxCloudLower")
 
     def test_config_drive_upper(self):
         """ConfigDrive datasource has a disk with LABEL=CONFIG-2."""
-        self._test_ds_found('ConfigDriveUpper')
+        self._test_ds_found("ConfigDriveUpper")
 
     def test_config_drive_seed(self):
         """Config Drive seed directory."""
-        self._test_ds_found('ConfigDrive-seed')
+        self._test_ds_found("ConfigDrive-seed")
 
     def test_config_drive_interacts_with_ibmcloud_config_disk(self):
         """Verify ConfigDrive interaction with IBMCloud.
@@ -304,34 +354,35 @@ class TestDsIdentify(DsIdentifyBase):
         If ConfigDrive is enabled and not IBMCloud, then ConfigDrive
         should claim the ibmcloud 'config-2' disk.
         If IBMCloud is enabled, then ConfigDrive should skip."""
-        data = copy.deepcopy(VALID_CFG['IBMCloud-config-2'])
-        files = data.get('files', {})
+        data = copy.deepcopy(VALID_CFG["IBMCloud-config-2"])
+        files = data.get("files", {})
         if not files:
-            data['files'] = files
-        cfgpath = 'etc/cloud/cloud.cfg.d/99_networklayer_common.cfg'
+            data["files"] = files
+        cfgpath = "etc/cloud/cloud.cfg.d/99_networklayer_common.cfg"
 
         # with list including IBMCloud, config drive should be not found.
-        files[cfgpath] = 'datasource_list: [ ConfigDrive, IBMCloud ]\n'
+        files[cfgpath] = "datasource_list: [ ConfigDrive, IBMCloud ]\n"
         ret = self._check_via_dict(data, shell_true)
-        self.assertEqual(
-            ret.cfg.get('datasource_list'), ['IBMCloud', 'None'])
+        self.assertEqual(ret.cfg.get("datasource_list"), ["IBMCloud", "None"])
 
         # But if IBMCloud is not enabled, config drive should claim this.
-        files[cfgpath] = 'datasource_list: [ ConfigDrive, NoCloud ]\n'
+        files[cfgpath] = "datasource_list: [ ConfigDrive, NoCloud ]\n"
         ret = self._check_via_dict(data, shell_true)
         self.assertEqual(
-            ret.cfg.get('datasource_list'), ['ConfigDrive', 'None'])
+            ret.cfg.get("datasource_list"), ["ConfigDrive", "None"]
+        )
 
     def test_ibmcloud_template_userdata_in_provisioning(self):
         """Template provisioned with user-data during provisioning stage.
 
         Template provisioning with user-data has METADATA disk,
         datasource should return not found."""
-        data = copy.deepcopy(VALID_CFG['IBMCloud-metadata'])
+        data = copy.deepcopy(VALID_CFG["IBMCloud-metadata"])
         # change the 'is_ibm_provisioning' mock to return 1 (false)
-        isprov_m = [m for m in data['mocks']
-                    if m["name"] == "is_ibm_provisioning"][0]
-        isprov_m['ret'] = shell_true
+        isprov_m = [
+            m for m in data["mocks"] if m["name"] == "is_ibm_provisioning"
+        ][0]
+        isprov_m["ret"] = shell_true
         return self._check_via_dict(data, RC_NOT_FOUND)
 
     def test_ibmcloud_template_userdata(self):
@@ -339,58 +390,61 @@ class TestDsIdentify(DsIdentifyBase):
 
         Template provisioning with user-data has METADATA disk.
         datasource should return found."""
-        self._test_ds_found('IBMCloud-metadata')
+        self._test_ds_found("IBMCloud-metadata")
 
     def test_ibmcloud_template_no_userdata_in_provisioning(self):
         """Template provisioned with no user-data during provisioning.
 
         no disks attached.  Datasource should return not found."""
-        data = copy.deepcopy(VALID_CFG['IBMCloud-nodisks'])
-        data['mocks'].append(
-            {'name': 'is_ibm_provisioning', 'ret': shell_true})
+        data = copy.deepcopy(VALID_CFG["IBMCloud-nodisks"])
+        data["mocks"].append(
+            {"name": "is_ibm_provisioning", "ret": shell_true}
+        )
         return self._check_via_dict(data, RC_NOT_FOUND)
 
     def test_ibmcloud_template_no_userdata(self):
         """Template provisioned with no user-data first boot.
 
         no disks attached.  Datasource should return found."""
-        self._check_via_dict(VALID_CFG['IBMCloud-nodisks'], RC_NOT_FOUND)
+        self._check_via_dict(VALID_CFG["IBMCloud-nodisks"], RC_NOT_FOUND)
 
     def test_ibmcloud_os_code(self):
         """Launched by os code always has config-2 disk."""
-        self._test_ds_found('IBMCloud-config-2')
+        self._test_ds_found("IBMCloud-config-2")
 
     def test_ibmcloud_os_code_different_uuid(self):
         """IBM cloud config-2 disks must be explicit match on UUID.
 
         If the UUID is not 9796-932E then we actually expect ConfigDrive."""
-        data = copy.deepcopy(VALID_CFG['IBMCloud-config-2'])
+        data = copy.deepcopy(VALID_CFG["IBMCloud-config-2"])
         offset = None
-        for m, d in enumerate(data['mocks']):
-            if d.get('name') == "blkid":
+        for m, d in enumerate(data["mocks"]):
+            if d.get("name") == "blkid":
                 offset = m
                 break
         if not offset:
             raise ValueError("Expected to find 'blkid' mock, but did not.")
-        data['mocks'][offset]['out'] = d['out'].replace(ds_ibm.IBM_CONFIG_UUID,
-                                                        "DEAD-BEEF")
+        data["mocks"][offset]["out"] = d["out"].replace(
+            ds_ibm.IBM_CONFIG_UUID, "DEAD-BEEF"
+        )
         self._check_via_dict(
-            data, rc=RC_FOUND, dslist=['ConfigDrive', DS_NONE])
+            data, rc=RC_FOUND, dslist=["ConfigDrive", DS_NONE]
+        )
 
     def test_ibmcloud_with_nocloud_seed(self):
         """NoCloud seed should be preferred over IBMCloud.
 
         A nocloud seed should be preferred over IBMCloud even if enabled.
         Ubuntu 16.04 images have <vlc>/seed/nocloud-net. LP: #1766401."""
-        data = copy.deepcopy(VALID_CFG['IBMCloud-config-2'])
-        files = data.get('files', {})
+        data = copy.deepcopy(VALID_CFG["IBMCloud-config-2"])
+        files = data.get("files", {})
         if not files:
-            data['files'] = files
-        files.update(VALID_CFG['NoCloud-seed']['files'])
+            data["files"] = files
+        files.update(VALID_CFG["NoCloud-seed"]["files"])
         ret = self._check_via_dict(data, shell_true)
         self.assertEqual(
-            ['NoCloud', 'IBMCloud', 'None'],
-            ret.cfg.get('datasource_list'))
+            ["NoCloud", "IBMCloud", "None"], ret.cfg.get("datasource_list")
+        )
 
     def test_ibmcloud_with_configdrive_seed(self):
         """ConfigDrive seed should be preferred over IBMCloud.
@@ -398,28 +452,28 @@ class TestDsIdentify(DsIdentifyBase):
         A ConfigDrive seed should be preferred over IBMCloud even if enabled.
         Ubuntu 16.04 images have a fstab entry that mounts the
         METADATA disk into <vlc>/seed/config_drive. LP: ##1766401."""
-        data = copy.deepcopy(VALID_CFG['IBMCloud-config-2'])
-        files = data.get('files', {})
+        data = copy.deepcopy(VALID_CFG["IBMCloud-config-2"])
+        files = data.get("files", {})
         if not files:
-            data['files'] = files
-        files.update(VALID_CFG['ConfigDrive-seed']['files'])
+            data["files"] = files
+        files.update(VALID_CFG["ConfigDrive-seed"]["files"])
         ret = self._check_via_dict(data, shell_true)
         self.assertEqual(
-            ['ConfigDrive', 'IBMCloud', 'None'],
-            ret.cfg.get('datasource_list'))
+            ["ConfigDrive", "IBMCloud", "None"], ret.cfg.get("datasource_list")
+        )
 
     def test_policy_disabled(self):
         """A Builtin policy of 'disabled' should return not found.
 
         Even though a search would find something, the builtin policy of
         disabled should cause the return of not found."""
-        mydata = copy.deepcopy(VALID_CFG['Ec2-hvm'])
+        mydata = copy.deepcopy(VALID_CFG["Ec2-hvm"])
         self._check_via_dict(mydata, rc=RC_NOT_FOUND, policy_dmi="disabled")
 
     def test_policy_config_disable_overrides_builtin(self):
         """explicit policy: disabled in config file should cause not found."""
-        mydata = copy.deepcopy(VALID_CFG['Ec2-hvm'])
-        mydata['files'][P_DSID_CFG] = '\n'.join(['policy: disabled', ''])
+        mydata = copy.deepcopy(VALID_CFG["Ec2-hvm"])
+        mydata["files"][P_DSID_CFG] = "\n".join(["policy: disabled", ""])
         self._check_via_dict(mydata, rc=RC_NOT_FOUND)
 
     def test_single_entry_defines_datasource(self):
@@ -428,54 +482,55 @@ class TestDsIdentify(DsIdentifyBase):
         Test the valid Ec2-hvm, but provide a config file that specifies
         a single entry in datasource_list.  The configured value should
         be used."""
-        mydata = copy.deepcopy(VALID_CFG['Ec2-hvm'])
-        cfgpath = 'etc/cloud/cloud.cfg.d/myds.cfg'
-        mydata['files'][cfgpath] = 'datasource_list: ["NoCloud"]\n'
-        self._check_via_dict(mydata, rc=RC_FOUND, dslist=['NoCloud', DS_NONE])
+        mydata = copy.deepcopy(VALID_CFG["Ec2-hvm"])
+        cfgpath = "etc/cloud/cloud.cfg.d/myds.cfg"
+        mydata["files"][cfgpath] = 'datasource_list: ["NoCloud"]\n'
+        self._check_via_dict(mydata, rc=RC_FOUND, dslist=["NoCloud", DS_NONE])
 
     def test_configured_list_with_none(self):
         """When datasource_list already contains None, None is not added.
 
         The explicitly configured datasource_list has 'None' in it.  That
         should not have None automatically added."""
-        mydata = copy.deepcopy(VALID_CFG['GCE'])
-        cfgpath = 'etc/cloud/cloud.cfg.d/myds.cfg'
-        mydata['files'][cfgpath] = 'datasource_list: ["Ec2", "None"]\n'
-        self._check_via_dict(mydata, rc=RC_FOUND, dslist=['Ec2', DS_NONE])
+        mydata = copy.deepcopy(VALID_CFG["GCE"])
+        cfgpath = "etc/cloud/cloud.cfg.d/myds.cfg"
+        mydata["files"][cfgpath] = 'datasource_list: ["Ec2", "None"]\n'
+        self._check_via_dict(mydata, rc=RC_FOUND, dslist=["Ec2", DS_NONE])
 
     def test_aliyun_identified(self):
         """Test that Aliyun cloud is identified by product id."""
-        self._test_ds_found('AliYun')
+        self._test_ds_found("AliYun")
 
     def test_aliyun_over_ec2(self):
         """Even if all other factors identified Ec2, AliYun should be used."""
-        mydata = copy.deepcopy(VALID_CFG['Ec2-xen'])
-        self._test_ds_found('AliYun')
-        prod_name = VALID_CFG['AliYun']['files'][P_PRODUCT_NAME]
-        mydata['files'][P_PRODUCT_NAME] = prod_name
+        mydata = copy.deepcopy(VALID_CFG["Ec2-xen"])
+        self._test_ds_found("AliYun")
+        prod_name = VALID_CFG["AliYun"]["files"][P_PRODUCT_NAME]
+        mydata["files"][P_PRODUCT_NAME] = prod_name
         policy = "search,found=first,maybe=none,notfound=disabled"
-        self._check_via_dict(mydata, rc=RC_FOUND, dslist=['AliYun', DS_NONE],
-                             policy_dmi=policy)
+        self._check_via_dict(
+            mydata, rc=RC_FOUND, dslist=["AliYun", DS_NONE], policy_dmi=policy
+        )
 
     def test_default_openstack_intel_is_found(self):
         """On Intel, openstack must be identified."""
-        self._test_ds_found('OpenStack')
+        self._test_ds_found("OpenStack")
 
     def test_openstack_open_telekom_cloud(self):
         """Open Telecom identification."""
-        self._test_ds_found('OpenStack-OpenTelekom')
+        self._test_ds_found("OpenStack-OpenTelekom")
 
     def test_openstack_sap_ccloud(self):
         """SAP Converged Cloud identification"""
-        self._test_ds_found('OpenStack-SAPCCloud')
+        self._test_ds_found("OpenStack-SAPCCloud")
 
     def test_openstack_asset_tag_nova(self):
         """OpenStack identification via asset tag OpenStack Nova."""
-        self._test_ds_found('OpenStack-AssetTag-Nova')
+        self._test_ds_found("OpenStack-AssetTag-Nova")
 
     def test_openstack_asset_tag_copute(self):
         """OpenStack identification via asset tag OpenStack Compute."""
-        self._test_ds_found('OpenStack-AssetTag-Compute')
+        self._test_ds_found("OpenStack-AssetTag-Compute")
 
     def test_openstack_on_non_intel_is_maybe(self):
         """On non-Intel, openstack without dmi info is maybe.
@@ -483,243 +538,282 @@ class TestDsIdentify(DsIdentifyBase):
         nova does not identify itself on platforms other than intel.
            https://bugs.launchpad.net/cloud-init/+bugs?field.tag=dsid-nova"""
 
-        data = copy.deepcopy(VALID_CFG['OpenStack'])
-        del data['files'][P_PRODUCT_NAME]
-        data.update({'policy_dmi': POLICY_FOUND_OR_MAYBE,
-                     'policy_no_dmi': POLICY_FOUND_OR_MAYBE})
+        data = copy.deepcopy(VALID_CFG["OpenStack"])
+        del data["files"][P_PRODUCT_NAME]
+        data.update(
+            {
+                "policy_dmi": POLICY_FOUND_OR_MAYBE,
+                "policy_no_dmi": POLICY_FOUND_OR_MAYBE,
+            }
+        )
 
         # this should show not found as default uname in tests is intel.
         # and intel openstack requires positive identification.
         self._check_via_dict(data, RC_NOT_FOUND, dslist=None)
 
         # updating the uname to ppc64 though should get a maybe.
-        data.update({'mocks': [MOCK_VIRT_IS_KVM, MOCK_UNAME_IS_PPC64]})
+        data.update({"mocks": [MOCK_VIRT_IS_KVM, MOCK_UNAME_IS_PPC64]})
         (_, _, err, _, _) = self._check_via_dict(
-            data, RC_FOUND, dslist=['OpenStack', 'None'])
+            data, RC_FOUND, dslist=["OpenStack", "None"]
+        )
         self.assertIn("check for 'OpenStack' returned maybe", err)
 
     def test_default_ovf_is_found(self):
         """OVF is identified found when ovf/ovf-env.xml seed file exists."""
-        self._test_ds_found('OVF-seed')
+        self._test_ds_found("OVF-seed")
 
     def test_default_ovf_with_detect_virt_none_not_found(self):
         """OVF identifies not found when detect_virt returns "none"."""
         self._check_via_dict(
-            {'ds': 'OVF'}, rc=RC_NOT_FOUND, policy_dmi="disabled")
+            {"ds": "OVF"}, rc=RC_NOT_FOUND, policy_dmi="disabled"
+        )
 
     def test_default_ovf_returns_not_found_on_azure(self):
         """OVF datasource won't be found as false positive on Azure."""
-        ovfonazure = copy.deepcopy(VALID_CFG['OVF'])
+        ovfonazure = copy.deepcopy(VALID_CFG["OVF"])
         # Set azure asset tag to assert OVF content not found
-        ovfonazure['files'][P_CHASSIS_ASSET_TAG] = (
-            '7783-7084-3265-9085-8269-3286-77\n')
-        self._check_via_dict(
-            ovfonazure, RC_FOUND, dslist=['Azure', DS_NONE])
+        ovfonazure["files"][
+            P_CHASSIS_ASSET_TAG
+        ] = "7783-7084-3265-9085-8269-3286-77\n"
+        self._check_via_dict(ovfonazure, RC_FOUND, dslist=["Azure", DS_NONE])
 
     def test_ovf_on_vmware_iso_found_by_cdrom_with_ovf_schema_match(self):
         """OVF is identified when iso9660 cdrom path contains ovf schema."""
-        self._test_ds_found('OVF')
+        self._test_ds_found("OVF")
 
     def test_ovf_on_vmware_guestinfo_found(self):
         """OVF guest info is found on vmware."""
-        self._test_ds_found('OVF-guestinfo')
+        self._test_ds_found("OVF-guestinfo")
 
     def test_ovf_on_vmware_iso_found_when_vmware_customization(self):
         """OVF is identified when vmware customization is enabled."""
-        self._test_ds_found('OVF-vmware-customization')
+        self._test_ds_found("OVF-vmware-customization")
 
     def test_ovf_on_vmware_iso_found_open_vm_tools_64(self):
         """OVF is identified when open-vm-tools installed in /usr/lib64."""
-        cust64 = copy.deepcopy(VALID_CFG['OVF-vmware-customization'])
-        p32 = 'usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so'
-        open64 = 'usr/lib64/open-vm-tools/plugins/vmsvc/libdeployPkgPlugin.so'
-        cust64['files'][open64] = cust64['files'][p32]
-        del cust64['files'][p32]
+        cust64 = copy.deepcopy(VALID_CFG["OVF-vmware-customization"])
+        p32 = "usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so"
+        open64 = "usr/lib64/open-vm-tools/plugins/vmsvc/libdeployPkgPlugin.so"
+        cust64["files"][open64] = cust64["files"][p32]
+        del cust64["files"][p32]
         return self._check_via_dict(
-            cust64, RC_FOUND, dslist=[cust64.get('ds'), DS_NONE])
+            cust64, RC_FOUND, dslist=[cust64.get("ds"), DS_NONE]
+        )
 
     def test_ovf_on_vmware_iso_found_open_vm_tools_x86_64_linux_gnu(self):
         """OVF is identified when open-vm-tools installed in
         /usr/lib/x86_64-linux-gnu."""
-        cust64 = copy.deepcopy(VALID_CFG['OVF-vmware-customization'])
-        p32 = 'usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so'
-        x86 = 'usr/lib/x86_64-linux-gnu/open-vm-tools/plugins/vmsvc/' \
-              'libdeployPkgPlugin.so'
-        cust64['files'][x86] = cust64['files'][p32]
-        del cust64['files'][p32]
+        cust64 = copy.deepcopy(VALID_CFG["OVF-vmware-customization"])
+        p32 = "usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so"
+        x86 = (
+            "usr/lib/x86_64-linux-gnu/open-vm-tools/plugins/vmsvc/"
+            "libdeployPkgPlugin.so"
+        )
+        cust64["files"][x86] = cust64["files"][p32]
+        del cust64["files"][p32]
         return self._check_via_dict(
-            cust64, RC_FOUND, dslist=[cust64.get('ds'), DS_NONE])
+            cust64, RC_FOUND, dslist=[cust64.get("ds"), DS_NONE]
+        )
 
     def test_ovf_on_vmware_iso_found_open_vm_tools_aarch64_linux_gnu(self):
         """OVF is identified when open-vm-tools installed in
         /usr/lib/aarch64-linux-gnu."""
-        cust64 = copy.deepcopy(VALID_CFG['OVF-vmware-customization'])
-        p32 = 'usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so'
-        aarch64 = 'usr/lib/aarch64-linux-gnu/open-vm-tools/plugins/vmsvc/' \
-                  'libdeployPkgPlugin.so'
-        cust64['files'][aarch64] = cust64['files'][p32]
-        del cust64['files'][p32]
+        cust64 = copy.deepcopy(VALID_CFG["OVF-vmware-customization"])
+        p32 = "usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so"
+        aarch64 = (
+            "usr/lib/aarch64-linux-gnu/open-vm-tools/plugins/vmsvc/"
+            "libdeployPkgPlugin.so"
+        )
+        cust64["files"][aarch64] = cust64["files"][p32]
+        del cust64["files"][p32]
         return self._check_via_dict(
-            cust64, RC_FOUND, dslist=[cust64.get('ds'), DS_NONE])
+            cust64, RC_FOUND, dslist=[cust64.get("ds"), DS_NONE]
+        )
 
     def test_ovf_on_vmware_iso_found_by_cdrom_with_matching_fs_label(self):
         """OVF is identified by well-known iso9660 labels."""
-        ovf_cdrom_by_label = copy.deepcopy(VALID_CFG['OVF'])
+        ovf_cdrom_by_label = copy.deepcopy(VALID_CFG["OVF"])
         # Unset matching cdrom ovf schema content
-        ovf_cdrom_by_label['files']['dev/sr0'] = 'No content match'
+        ovf_cdrom_by_label["files"]["dev/sr0"] = "No content match"
         self._check_via_dict(
-            ovf_cdrom_by_label, rc=RC_NOT_FOUND, policy_dmi="disabled")
+            ovf_cdrom_by_label, rc=RC_NOT_FOUND, policy_dmi="disabled"
+        )
 
         # Add recognized labels
-        valid_ovf_labels = ['ovf-transport', 'OVF-TRANSPORT',
-                            "OVFENV", "ovfenv", "OVF ENV", "ovf env"]
+        valid_ovf_labels = [
+            "ovf-transport",
+            "OVF-TRANSPORT",
+            "OVFENV",
+            "ovfenv",
+            "OVF ENV",
+            "ovf env",
+        ]
         for valid_ovf_label in valid_ovf_labels:
-            ovf_cdrom_by_label['mocks'][0]['out'] = blkid_out([
-                {'DEVNAME': 'sda1', 'TYPE': 'ext4', 'LABEL': 'rootfs'},
-                {'DEVNAME': 'sr0', 'TYPE': 'iso9660',
-                 'LABEL': valid_ovf_label},
-                {'DEVNAME': 'vda1', 'TYPE': 'ntfs', 'LABEL': 'data'}])
+            ovf_cdrom_by_label["mocks"][0]["out"] = blkid_out(
+                [
+                    {"DEVNAME": "sda1", "TYPE": "ext4", "LABEL": "rootfs"},
+                    {
+                        "DEVNAME": "sr0",
+                        "TYPE": "iso9660",
+                        "LABEL": valid_ovf_label,
+                    },
+                    {"DEVNAME": "vda1", "TYPE": "ntfs", "LABEL": "data"},
+                ]
+            )
             self._check_via_dict(
-                ovf_cdrom_by_label, rc=RC_FOUND, dslist=['OVF', DS_NONE])
+                ovf_cdrom_by_label, rc=RC_FOUND, dslist=["OVF", DS_NONE]
+            )
 
     def test_ovf_on_vmware_iso_found_by_cdrom_with_different_size(self):
         """OVF is identified by well-known iso9660 labels."""
-        ovf_cdrom_with_size = copy.deepcopy(VALID_CFG['OVF'])
+        ovf_cdrom_with_size = copy.deepcopy(VALID_CFG["OVF"])
 
         # Set cdrom size to 20480 (10MB in 512 byte units)
-        ovf_cdrom_with_size['files']['sys/class/block/sr0/size'] = '20480\n'
+        ovf_cdrom_with_size["files"]["sys/class/block/sr0/size"] = "20480\n"
         self._check_via_dict(
-            ovf_cdrom_with_size, rc=RC_NOT_FOUND, policy_dmi="disabled")
+            ovf_cdrom_with_size, rc=RC_NOT_FOUND, policy_dmi="disabled"
+        )
 
         # Set cdrom size to 204800 (100MB in 512 byte units)
-        ovf_cdrom_with_size['files']['sys/class/block/sr0/size'] = '204800\n'
+        ovf_cdrom_with_size["files"]["sys/class/block/sr0/size"] = "204800\n"
         self._check_via_dict(
-            ovf_cdrom_with_size, rc=RC_NOT_FOUND, policy_dmi="disabled")
+            ovf_cdrom_with_size, rc=RC_NOT_FOUND, policy_dmi="disabled"
+        )
 
         # Set cdrom size to 18432 (9MB in 512 byte units)
-        ovf_cdrom_with_size['files']['sys/class/block/sr0/size'] = '18432\n'
+        ovf_cdrom_with_size["files"]["sys/class/block/sr0/size"] = "18432\n"
         self._check_via_dict(
-            ovf_cdrom_with_size, rc=RC_FOUND, dslist=['OVF', DS_NONE])
+            ovf_cdrom_with_size, rc=RC_FOUND, dslist=["OVF", DS_NONE]
+        )
 
         # Set cdrom size to 2048 (1MB in 512 byte units)
-        ovf_cdrom_with_size['files']['sys/class/block/sr0/size'] = '2048\n'
+        ovf_cdrom_with_size["files"]["sys/class/block/sr0/size"] = "2048\n"
         self._check_via_dict(
-            ovf_cdrom_with_size, rc=RC_FOUND, dslist=['OVF', DS_NONE])
+            ovf_cdrom_with_size, rc=RC_FOUND, dslist=["OVF", DS_NONE]
+        )
 
     def test_default_nocloud_as_vdb_iso9660(self):
         """NoCloud is found with iso9660 filesystem on non-cdrom disk."""
-        self._test_ds_found('NoCloud')
+        self._test_ds_found("NoCloud")
 
     def test_nocloud_upper(self):
         """NoCloud is found with uppercase filesystem label."""
-        self._test_ds_found('NoCloudUpper')
+        self._test_ds_found("NoCloudUpper")
 
     def test_nocloud_fatboot(self):
         """NoCloud fatboot label - LP: #184166."""
-        self._test_ds_found('NoCloud-fatboot')
+        self._test_ds_found("NoCloud-fatboot")
 
     def test_nocloud_seed(self):
         """Nocloud seed directory."""
-        self._test_ds_found('NoCloud-seed')
+        self._test_ds_found("NoCloud-seed")
 
     def test_nocloud_seed_ubuntu_core_writable(self):
         """Nocloud seed directory ubuntu core writable"""
-        self._test_ds_found('NoCloud-seed-ubuntu-core')
+        self._test_ds_found("NoCloud-seed-ubuntu-core")
 
     def test_hetzner_found(self):
         """Hetzner cloud is identified in sys_vendor."""
-        self._test_ds_found('Hetzner')
+        self._test_ds_found("Hetzner")
 
     def test_smartos_bhyve(self):
         """SmartOS cloud identified by SmartDC in dmi."""
-        self._test_ds_found('SmartOS-bhyve')
+        self._test_ds_found("SmartOS-bhyve")
 
     def test_smartos_lxbrand(self):
         """SmartOS cloud identified on lxbrand container."""
-        self._test_ds_found('SmartOS-lxbrand')
+        self._test_ds_found("SmartOS-lxbrand")
 
     def test_smartos_lxbrand_requires_socket(self):
         """SmartOS cloud should not be identified if no socket file."""
-        mycfg = copy.deepcopy(VALID_CFG['SmartOS-lxbrand'])
-        del mycfg['files'][ds_smartos.METADATA_SOCKFILE]
+        mycfg = copy.deepcopy(VALID_CFG["SmartOS-lxbrand"])
+        del mycfg["files"][ds_smartos.METADATA_SOCKFILE]
         self._check_via_dict(mycfg, rc=RC_NOT_FOUND, policy_dmi="disabled")
 
     def test_path_env_gets_set_from_main(self):
         """PATH environment should always have some tokens when main is run.
 
         We explicitly call main as we want to ensure it updates PATH."""
-        cust = copy.deepcopy(VALID_CFG['NoCloud'])
+        cust = copy.deepcopy(VALID_CFG["NoCloud"])
         rootd = self.tmp_dir()
-        mpp = 'main-printpath'
+        mpp = "main-printpath"
         pre = "MYPATH="
-        cust['files'][mpp] = (
-            'PATH="/mycust/path"; main; r=$?; echo ' + pre + '$PATH; exit $r;')
+        cust["files"][mpp] = (
+            'PATH="/mycust/path"; main; r=$?; echo ' + pre + "$PATH; exit $r;"
+        )
         ret = self._check_via_dict(
-            cust, RC_FOUND,
-            func=".", args=[os.path.join(rootd, mpp)], rootd=rootd)
+            cust,
+            RC_FOUND,
+            func=".",
+            args=[os.path.join(rootd, mpp)],
+            rootd=rootd,
+        )
         match = [
             line for line in ret.stdout.splitlines() if line.startswith(pre)
         ][0]
         toks = match.replace(pre, "").split(":")
         expected = ["/sbin", "/bin", "/usr/sbin", "/usr/bin", "/mycust/path"]
-        self.assertEqual(expected, [p for p in expected if p in toks],
-                         "path did not have expected tokens")
+        self.assertEqual(
+            expected,
+            [p for p in expected if p in toks],
+            "path did not have expected tokens",
+        )
 
     def test_zstack_is_ec2(self):
         """EC2: chassis asset tag ends with 'zstack.io'"""
-        self._test_ds_found('Ec2-ZStack')
+        self._test_ds_found("Ec2-ZStack")
 
     def test_e24cloud_is_ec2(self):
         """EC2: e24cloud identified by sys_vendor"""
-        self._test_ds_found('Ec2-E24Cloud')
+        self._test_ds_found("Ec2-E24Cloud")
 
     def test_e24cloud_not_active(self):
         """EC2: bobrightbox.com in product_serial is not brightbox'"""
-        self._test_ds_not_found('Ec2-E24Cloud-negative')
+        self._test_ds_not_found("Ec2-E24Cloud-negative")
 
     def test_vmware_no_valid_transports(self):
         """VMware: no valid transports"""
-        self._test_ds_not_found('VMware-NoValidTransports')
+        self._test_ds_not_found("VMware-NoValidTransports")
 
     def test_vmware_envvar_no_data(self):
         """VMware: envvar transport no data"""
-        self._test_ds_not_found('VMware-EnvVar-NoData')
+        self._test_ds_not_found("VMware-EnvVar-NoData")
 
     def test_vmware_envvar_no_virt_id(self):
         """VMware: envvar transport success if no virt id"""
-        self._test_ds_found('VMware-EnvVar-NoVirtID')
+        self._test_ds_found("VMware-EnvVar-NoVirtID")
 
     def test_vmware_envvar_activated_by_metadata(self):
         """VMware: envvar transport activated by metadata"""
-        self._test_ds_found('VMware-EnvVar-Metadata')
+        self._test_ds_found("VMware-EnvVar-Metadata")
 
     def test_vmware_envvar_activated_by_userdata(self):
         """VMware: envvar transport activated by userdata"""
-        self._test_ds_found('VMware-EnvVar-Userdata')
+        self._test_ds_found("VMware-EnvVar-Userdata")
 
     def test_vmware_envvar_activated_by_vendordata(self):
         """VMware: envvar transport activated by vendordata"""
-        self._test_ds_found('VMware-EnvVar-Vendordata')
+        self._test_ds_found("VMware-EnvVar-Vendordata")
 
     def test_vmware_guestinfo_no_data(self):
         """VMware: guestinfo transport no data"""
-        self._test_ds_not_found('VMware-GuestInfo-NoData')
+        self._test_ds_not_found("VMware-GuestInfo-NoData")
 
     def test_vmware_guestinfo_no_virt_id(self):
         """VMware: guestinfo transport fails if no virt id"""
-        self._test_ds_not_found('VMware-GuestInfo-NoVirtID')
+        self._test_ds_not_found("VMware-GuestInfo-NoVirtID")
 
     def test_vmware_guestinfo_activated_by_metadata(self):
         """VMware: guestinfo transport activated by metadata"""
-        self._test_ds_found('VMware-GuestInfo-Metadata')
+        self._test_ds_found("VMware-GuestInfo-Metadata")
 
     def test_vmware_guestinfo_activated_by_userdata(self):
         """VMware: guestinfo transport activated by userdata"""
-        self._test_ds_found('VMware-GuestInfo-Userdata')
+        self._test_ds_found("VMware-GuestInfo-Userdata")
 
     def test_vmware_guestinfo_activated_by_vendordata(self):
         """VMware: guestinfo transport activated by vendordata"""
-        self._test_ds_found('VMware-GuestInfo-Vendordata')
+        self._test_ds_found("VMware-GuestInfo-Vendordata")
 
 
 class TestBSDNoSys(DsIdentifyBase):
@@ -735,14 +829,14 @@ class TestBSDNoSys(DsIdentifyBase):
 
         This will be used on FreeBSD systems.
         """
-        self._test_ds_found('Hetzner-kenv')
+        self._test_ds_found("Hetzner-kenv")
 
     def test_dmi_dmidecode(self):
         """Test that dmidecode(8) works on systems which don't have /sys
 
         This will be used on all other BSD systems.
         """
-        self._test_ds_found('Hetzner-dmidecode')
+        self._test_ds_found("Hetzner-dmidecode")
 
 
 class TestIsIBMProvisioning(DsIdentifyBase):
@@ -766,9 +860,11 @@ class TestIsIBMProvisioning(DsIdentifyBase):
     def test_config_with_old_log(self):
         """A config with a log from previous boot is not provisioning."""
         rootd = self.tmp_dir()
-        data = {self.prov_cfg: ("key=value\nkey2=val2\n", -10),
-                self.inst_log: ("log data\n", -30),
-                self.boot_ref: ("PWD=/", 0)}
+        data = {
+            self.prov_cfg: ("key=value\nkey2=val2\n", -10),
+            self.inst_log: ("log data\n", -30),
+            self.boot_ref: ("PWD=/", 0),
+        }
         populate_dir_with_ts(rootd, data)
         ret = self.call(rootd=rootd, func=self.funcname)
         self.assertEqual(shell_false, ret.rc)
@@ -777,9 +873,11 @@ class TestIsIBMProvisioning(DsIdentifyBase):
     def test_config_with_new_log(self):
         """A config with a log from this boot is provisioning."""
         rootd = self.tmp_dir()
-        data = {self.prov_cfg: ("key=value\nkey2=val2\n", -10),
-                self.inst_log: ("log data\n", 30),
-                self.boot_ref: ("PWD=/", 0)}
+        data = {
+            self.prov_cfg: ("key=value\nkey2=val2\n", -10),
+            self.inst_log: ("log data\n", 30),
+            self.boot_ref: ("PWD=/", 0),
+        }
         populate_dir_with_ts(rootd, data)
         ret = self.call(rootd=rootd, func=self.funcname)
         self.assertEqual(shell_true, ret.rc)
@@ -789,12 +887,12 @@ class TestIsIBMProvisioning(DsIdentifyBase):
 class TestOracle(DsIdentifyBase):
     def test_found_by_chassis(self):
         """Simple positive test of Oracle by chassis id."""
-        self._test_ds_found('Oracle')
+        self._test_ds_found("Oracle")
 
     def test_not_found(self):
         """Simple negative test of Oracle."""
-        mycfg = copy.deepcopy(VALID_CFG['Oracle'])
-        mycfg['files'][P_CHASSIS_ASSET_TAG] = "Not Oracle"
+        mycfg = copy.deepcopy(VALID_CFG["Oracle"])
+        mycfg["files"][P_CHASSIS_ASSET_TAG] = "Not Oracle"
         self._check_via_dict(mycfg, rc=RC_NOT_FOUND)
 
 
@@ -811,7 +909,7 @@ def blkid_out(disks=None):
         for key in [d for d in disk if d != "DEVNAME"]:
             lines.append("%s=%s" % (key, disk[key]))
         lines.append("")
-    return '\n'.join(lines)
+    return "\n".join(lines)
 
 
 def geom_out(disks=None):
@@ -828,616 +926,809 @@ def geom_out(disks=None):
         disks = []
     lines = []
     for disk in disks:
-        lines.append("%s/%s  N/A  %s" % (
-            disk["TYPE"], disk["LABEL"], disk["DEVNAME"]))
+        lines.append(
+            "%s/%s  N/A  %s" % (disk["TYPE"], disk["LABEL"], disk["DEVNAME"])
+        )
         lines.append("")
-    return '\n'.join(lines)
+    return "\n".join(lines)
 
 
 def _print_run_output(rc, out, err, cfg, files):
     """A helper to print return of TestDsIdentify.
 
-       _print_run_output(self.call())"""
-    print('\n'.join([
-        '-- rc = %s --' % rc,
-        '-- out --', str(out),
-        '-- err --', str(err),
-        '-- cfg --', util.json_dumps(cfg)]))
-    print('-- files --')
+    _print_run_output(self.call())"""
+    print(
+        "\n".join(
+            [
+                "-- rc = %s --" % rc,
+                "-- out --",
+                str(out),
+                "-- err --",
+                str(err),
+                "-- cfg --",
+                util.json_dumps(cfg),
+            ]
+        )
+    )
+    print("-- files --")
     for k, v in files.items():
         if "/_shwrap" in k:
             continue
-        print(' === %s ===' % k)
+        print(" === %s ===" % k)
         for line in v.splitlines():
             print(" " + line)
 
 
 VALID_CFG = {
-    'AliYun': {
-        'ds': 'AliYun',
-        'files': {P_PRODUCT_NAME: 'Alibaba Cloud ECS\n'},
+    "AliYun": {
+        "ds": "AliYun",
+        "files": {P_PRODUCT_NAME: "Alibaba Cloud ECS\n"},
     },
-    'Azure-dmi-detection': {
-        'ds': 'Azure',
-        'files': {
-            P_CHASSIS_ASSET_TAG: '7783-7084-3265-9085-8269-3286-77\n',
-        }
+    "Azure-dmi-detection": {
+        "ds": "Azure",
+        "files": {
+            P_CHASSIS_ASSET_TAG: "7783-7084-3265-9085-8269-3286-77\n",
+        },
     },
-    'Azure-seed-detection': {
-        'ds': 'Azure',
-        'files': {
-            P_CHASSIS_ASSET_TAG: 'No-match\n',
-            os.path.join(P_SEED_DIR, 'azure', 'ovf-env.xml'): 'present\n',
-        }
+    "Azure-seed-detection": {
+        "ds": "Azure",
+        "files": {
+            P_CHASSIS_ASSET_TAG: "No-match\n",
+            os.path.join(P_SEED_DIR, "azure", "ovf-env.xml"): "present\n",
+        },
     },
-    'Ec2-hvm': {
-        'ds': 'Ec2',
-        'mocks': [{'name': 'detect_virt', 'RET': 'kvm', 'ret': 0}],
-        'files': {
-            P_PRODUCT_SERIAL: 'ec23aef5-54be-4843-8d24-8c819f88453e\n',
-            P_PRODUCT_UUID: 'EC23AEF5-54BE-4843-8D24-8C819F88453E\n',
-        }
+    "Ec2-hvm": {
+        "ds": "Ec2",
+        "mocks": [{"name": "detect_virt", "RET": "kvm", "ret": 0}],
+        "files": {
+            P_PRODUCT_SERIAL: "ec23aef5-54be-4843-8d24-8c819f88453e\n",
+            P_PRODUCT_UUID: "EC23AEF5-54BE-4843-8D24-8C819F88453E\n",
+        },
     },
-    'Ec2-xen': {
-        'ds': 'Ec2',
-        'mocks': [MOCK_VIRT_IS_XEN],
-        'files': {
-            'sys/hypervisor/uuid': 'ec2c6e2f-5fac-4fc7-9c82-74127ec14bbb\n'
+    "Ec2-xen": {
+        "ds": "Ec2",
+        "mocks": [MOCK_VIRT_IS_XEN],
+        "files": {
+            "sys/hypervisor/uuid": "ec2c6e2f-5fac-4fc7-9c82-74127ec14bbb\n"
         },
     },
-    'Ec2-brightbox': {
-        'ds': 'Ec2',
-        'files': {P_PRODUCT_SERIAL: 'srv-otuxg.gb1.brightbox.com\n'},
+    "Ec2-brightbox": {
+        "ds": "Ec2",
+        "files": {P_PRODUCT_SERIAL: "srv-otuxg.gb1.brightbox.com\n"},
     },
-    'Ec2-brightbox-negative': {
-        'ds': 'Ec2',
-        'files': {P_PRODUCT_SERIAL: 'tricky-host.bobrightbox.com\n'},
+    "Ec2-brightbox-negative": {
+        "ds": "Ec2",
+        "files": {P_PRODUCT_SERIAL: "tricky-host.bobrightbox.com\n"},
     },
-    'GCE': {
-        'ds': 'GCE',
-        'files': {P_PRODUCT_NAME: 'Google Compute Engine\n'},
-        'mocks': [MOCK_VIRT_IS_KVM],
+    "GCE": {
+        "ds": "GCE",
+        "files": {P_PRODUCT_NAME: "Google Compute Engine\n"},
+        "mocks": [MOCK_VIRT_IS_KVM],
     },
-    'GCE-serial': {
-        'ds': 'GCE',
-        'files': {P_PRODUCT_SERIAL: 'GoogleCloud-8f2e88f\n'},
-        'mocks': [MOCK_VIRT_IS_KVM],
+    "GCE-serial": {
+        "ds": "GCE",
+        "files": {P_PRODUCT_SERIAL: "GoogleCloud-8f2e88f\n"},
+        "mocks": [MOCK_VIRT_IS_KVM],
     },
-    'NoCloud': {
-        'ds': 'NoCloud',
-        'mocks': [
+    "NoCloud": {
+        "ds": "NoCloud",
+        "mocks": [
             MOCK_VIRT_IS_KVM,
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 BLKID_UEFI_UBUNTU +
-                 [{'DEVNAME': 'vdb', 'TYPE': 'iso9660', 'LABEL': 'cidata'}])},
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    BLKID_UEFI_UBUNTU
+                    + [
+                        {
+                            "DEVNAME": "vdb",
+                            "TYPE": "iso9660",
+                            "LABEL": "cidata",
+                        }
+                    ]
+                ),
+            },
         ],
-        'files': {
-            'dev/vdb': 'pretend iso content for cidata\n',
-        }
+        "files": {
+            "dev/vdb": "pretend iso content for cidata\n",
+        },
     },
-    'NoCloud-fbsd': {
-        'ds': 'NoCloud',
-        'mocks': [
+    "NoCloud-fbsd": {
+        "ds": "NoCloud",
+        "mocks": [
             MOCK_VIRT_IS_KVM,
             MOCK_UNAME_IS_FREEBSD,
-            {'name': 'geom', 'ret': 0,
-             'out': geom_out(
-                 [{'DEVNAME': 'vtbd', 'TYPE': 'iso9660', 'LABEL': 'cidata'}])},
+            {
+                "name": "geom",
+                "ret": 0,
+                "out": geom_out(
+                    [{"DEVNAME": "vtbd", "TYPE": "iso9660", "LABEL": "cidata"}]
+                ),
+            },
         ],
-        'files': {
-            '/dev/vtdb': 'pretend iso content for cidata\n',
-        }
+        "files": {
+            "/dev/vtdb": "pretend iso content for cidata\n",
+        },
     },
-    'NoCloudUpper': {
-        'ds': 'NoCloud',
-        'mocks': [
+    "NoCloudUpper": {
+        "ds": "NoCloud",
+        "mocks": [
             MOCK_VIRT_IS_KVM,
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 BLKID_UEFI_UBUNTU +
-                 [{'DEVNAME': 'vdb', 'TYPE': 'iso9660', 'LABEL': 'CIDATA'}])},
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    BLKID_UEFI_UBUNTU
+                    + [
+                        {
+                            "DEVNAME": "vdb",
+                            "TYPE": "iso9660",
+                            "LABEL": "CIDATA",
+                        }
+                    ]
+                ),
+            },
         ],
-        'files': {
-            'dev/vdb': 'pretend iso content for cidata\n',
-        }
+        "files": {
+            "dev/vdb": "pretend iso content for cidata\n",
+        },
     },
-    'NoCloud-fatboot': {
-        'ds': 'NoCloud',
-        'mocks': [
+    "NoCloud-fatboot": {
+        "ds": "NoCloud",
+        "mocks": [
             MOCK_VIRT_IS_XEN,
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 BLKID_UEFI_UBUNTU +
-                 [{'DEVNAME': 'xvdb', 'TYPE': 'vfat', 'SEC_TYPE': 'msdos',
-                   'UUID': '355a-4FC2', 'LABEL_FATBOOT': 'cidata'}])},
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    BLKID_UEFI_UBUNTU
+                    + [
+                        {
+                            "DEVNAME": "xvdb",
+                            "TYPE": "vfat",
+                            "SEC_TYPE": "msdos",
+                            "UUID": "355a-4FC2",
+                            "LABEL_FATBOOT": "cidata",
+                        }
+                    ]
+                ),
+            },
         ],
-        'files': {
-            'dev/vdb': 'pretend iso content for cidata\n',
-        }
+        "files": {
+            "dev/vdb": "pretend iso content for cidata\n",
+        },
     },
-    'NoCloud-seed': {
-        'ds': 'NoCloud',
-        'files': {
-            os.path.join(P_SEED_DIR, 'nocloud', 'user-data'): 'ud\n',
-            os.path.join(P_SEED_DIR, 'nocloud', 'meta-data'): 'md\n',
-        }
+    "NoCloud-seed": {
+        "ds": "NoCloud",
+        "files": {
+            os.path.join(P_SEED_DIR, "nocloud", "user-data"): "ud\n",
+            os.path.join(P_SEED_DIR, "nocloud", "meta-data"): "md\n",
+        },
     },
-    'NoCloud-seed-ubuntu-core': {
-        'ds': 'NoCloud',
-        'files': {
-            os.path.join('writable/system-data', P_SEED_DIR,
-                         'nocloud-net', 'user-data'): 'ud\n',
-            os.path.join('writable/system-data', P_SEED_DIR,
-                         'nocloud-net', 'meta-data'): 'md\n',
-        }
+    "NoCloud-seed-ubuntu-core": {
+        "ds": "NoCloud",
+        "files": {
+            os.path.join(
+                "writable/system-data", P_SEED_DIR, "nocloud-net", "user-data"
+            ): "ud\n",
+            os.path.join(
+                "writable/system-data", P_SEED_DIR, "nocloud-net", "meta-data"
+            ): "md\n",
+        },
     },
-    'OpenStack': {
-        'ds': 'OpenStack',
-        'files': {P_PRODUCT_NAME: 'OpenStack Nova\n'},
-        'mocks': [MOCK_VIRT_IS_KVM],
-        'policy_dmi': POLICY_FOUND_ONLY,
-        'policy_no_dmi': POLICY_FOUND_ONLY,
+    "OpenStack": {
+        "ds": "OpenStack",
+        "files": {P_PRODUCT_NAME: "OpenStack Nova\n"},
+        "mocks": [MOCK_VIRT_IS_KVM],
+        "policy_dmi": POLICY_FOUND_ONLY,
+        "policy_no_dmi": POLICY_FOUND_ONLY,
     },
-    'OpenStack-OpenTelekom': {
+    "OpenStack-OpenTelekom": {
         # OTC gen1 (Xen) hosts use OpenStack datasource, LP: #1756471
-        'ds': 'OpenStack',
-        'files': {P_CHASSIS_ASSET_TAG: 'OpenTelekomCloud\n'},
-        'mocks': [MOCK_VIRT_IS_XEN],
+        "ds": "OpenStack",
+        "files": {P_CHASSIS_ASSET_TAG: "OpenTelekomCloud\n"},
+        "mocks": [MOCK_VIRT_IS_XEN],
     },
-    'OpenStack-SAPCCloud': {
+    "OpenStack-SAPCCloud": {
         # SAP CCloud hosts use OpenStack on VMware
-        'ds': 'OpenStack',
-        'files': {P_CHASSIS_ASSET_TAG: 'SAP CCloud VM\n'},
-        'mocks': [MOCK_VIRT_IS_VMWARE],
+        "ds": "OpenStack",
+        "files": {P_CHASSIS_ASSET_TAG: "SAP CCloud VM\n"},
+        "mocks": [MOCK_VIRT_IS_VMWARE],
     },
-    'OpenStack-AssetTag-Nova': {
+    "OpenStack-AssetTag-Nova": {
         # VMware vSphere can't modify product-name, LP: #1669875
-        'ds': 'OpenStack',
-        'files': {P_CHASSIS_ASSET_TAG: 'OpenStack Nova\n'},
-        'mocks': [MOCK_VIRT_IS_XEN],
+        "ds": "OpenStack",
+        "files": {P_CHASSIS_ASSET_TAG: "OpenStack Nova\n"},
+        "mocks": [MOCK_VIRT_IS_XEN],
     },
-    'OpenStack-AssetTag-Compute': {
+    "OpenStack-AssetTag-Compute": {
         # VMware vSphere can't modify product-name, LP: #1669875
-        'ds': 'OpenStack',
-        'files': {P_CHASSIS_ASSET_TAG: 'OpenStack Compute\n'},
-        'mocks': [MOCK_VIRT_IS_XEN],
+        "ds": "OpenStack",
+        "files": {P_CHASSIS_ASSET_TAG: "OpenStack Compute\n"},
+        "mocks": [MOCK_VIRT_IS_XEN],
     },
-    'OVF-seed': {
-        'ds': 'OVF',
-        'files': {
-            os.path.join(P_SEED_DIR, 'ovf', 'ovf-env.xml'): 'present\n',
-        }
+    "OVF-seed": {
+        "ds": "OVF",
+        "files": {
+            os.path.join(P_SEED_DIR, "ovf", "ovf-env.xml"): "present\n",
+        },
     },
-    'OVF-vmware-customization': {
-        'ds': 'OVF',
-        'mocks': [
+    "OVF-vmware-customization": {
+        "ds": "OVF",
+        "mocks": [
             # Include a mockes iso9660 potential, even though content not ovf
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'sr0', 'TYPE': 'iso9660', 'LABEL': ''}])
-             },
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [{"DEVNAME": "sr0", "TYPE": "iso9660", "LABEL": ""}]
+                ),
+            },
             MOCK_VIRT_IS_VMWARE,
         ],
-        'files': {
-            'dev/sr0': 'no match',
+        "files": {
+            "dev/sr0": "no match",
             # Setup vmware customization enabled
-            'usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so': 'here',
-            'etc/cloud/cloud.cfg': 'disable_vmware_customization: false\n',
-        }
+            "usr/lib/vmware-tools/plugins/vmsvc/libdeployPkgPlugin.so": "here",
+            "etc/cloud/cloud.cfg": "disable_vmware_customization: false\n",
+        },
     },
-    'OVF': {
-        'ds': 'OVF',
-        'mocks': [
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'sr0', 'TYPE': 'iso9660', 'LABEL': ''},
-                  {'DEVNAME': 'sr1', 'TYPE': 'iso9660', 'LABEL': 'ignoreme'},
-                  {'DEVNAME': 'vda1', 'TYPE': 'vfat', 'PARTUUID': uuid4()}]),
-             },
+    "OVF": {
+        "ds": "OVF",
+        "mocks": [
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {"DEVNAME": "sr0", "TYPE": "iso9660", "LABEL": ""},
+                        {
+                            "DEVNAME": "sr1",
+                            "TYPE": "iso9660",
+                            "LABEL": "ignoreme",
+                        },
+                        {
+                            "DEVNAME": "vda1",
+                            "TYPE": "vfat",
+                            "PARTUUID": uuid4(),
+                        },
+                    ]
+                ),
+            },
             MOCK_VIRT_IS_VMWARE,
         ],
-        'files': {
-            'dev/sr0': 'pretend ovf iso has ' + OVF_MATCH_STRING + '\n',
-            'sys/class/block/sr0/size': '2048\n',
-        }
+        "files": {
+            "dev/sr0": "pretend ovf iso has " + OVF_MATCH_STRING + "\n",
+            "sys/class/block/sr0/size": "2048\n",
+        },
     },
-    'OVF-guestinfo': {
-        'ds': 'OVF',
-        'mocks': [
-            {'name': 'ovf_vmware_transport_guestinfo', 'ret': 0,
-             'out': '<?xml version="1.0" encoding="UTF-8"?>\n<Environment'},
+    "OVF-guestinfo": {
+        "ds": "OVF",
+        "mocks": [
+            {
+                "name": "ovf_vmware_transport_guestinfo",
+                "ret": 0,
+                "out": '<?xml version="1.0" encoding="UTF-8"?>\n<Environment',
+            },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'ConfigDrive': {
-        'ds': 'ConfigDrive',
-        'mocks': [
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'vda1', 'TYPE': 'vfat', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vda2', 'TYPE': 'ext4',
-                   'LABEL': 'cloudimg-rootfs', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vdb', 'TYPE': 'vfat', 'LABEL': 'config-2'}])
-             },
+    "ConfigDrive": {
+        "ds": "ConfigDrive",
+        "mocks": [
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "vda1",
+                            "TYPE": "vfat",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "vda2",
+                            "TYPE": "ext4",
+                            "LABEL": "cloudimg-rootfs",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "vdb",
+                            "TYPE": "vfat",
+                            "LABEL": "config-2",
+                        },
+                    ]
+                ),
+            },
         ],
     },
-    'ConfigDriveUpper': {
-        'ds': 'ConfigDrive',
-        'mocks': [
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'vda1', 'TYPE': 'vfat', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vda2', 'TYPE': 'ext4',
-                   'LABEL': 'cloudimg-rootfs', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vdb', 'TYPE': 'vfat', 'LABEL': 'CONFIG-2'}])
-             },
+    "ConfigDriveUpper": {
+        "ds": "ConfigDrive",
+        "mocks": [
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "vda1",
+                            "TYPE": "vfat",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "vda2",
+                            "TYPE": "ext4",
+                            "LABEL": "cloudimg-rootfs",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "vdb",
+                            "TYPE": "vfat",
+                            "LABEL": "CONFIG-2",
+                        },
+                    ]
+                ),
+            },
         ],
     },
-    'ConfigDrive-seed': {
-        'ds': 'ConfigDrive',
-        'files': {
-            os.path.join(P_SEED_DIR, 'config_drive', 'openstack',
-                         'latest', 'meta_data.json'): 'md\n'},
+    "ConfigDrive-seed": {
+        "ds": "ConfigDrive",
+        "files": {
+            os.path.join(
+                P_SEED_DIR,
+                "config_drive",
+                "openstack",
+                "latest",
+                "meta_data.json",
+            ): "md\n"
+        },
     },
-    'RbxCloud': {
-        'ds': 'RbxCloud',
-        'mocks': [
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'vda1', 'TYPE': 'vfat', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vda2', 'TYPE': 'ext4',
-                   'LABEL': 'cloudimg-rootfs', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vdb', 'TYPE': 'vfat', 'LABEL': 'CLOUDMD'}]
-             )},
+    "RbxCloud": {
+        "ds": "RbxCloud",
+        "mocks": [
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "vda1",
+                            "TYPE": "vfat",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "vda2",
+                            "TYPE": "ext4",
+                            "LABEL": "cloudimg-rootfs",
+                            "PARTUUID": uuid4(),
+                        },
+                        {"DEVNAME": "vdb", "TYPE": "vfat", "LABEL": "CLOUDMD"},
+                    ]
+                ),
+            },
         ],
     },
-    'RbxCloudLower': {
-        'ds': 'RbxCloud',
-        'mocks': [
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'vda1', 'TYPE': 'vfat', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vda2', 'TYPE': 'ext4',
-                   'LABEL': 'cloudimg-rootfs', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'vdb', 'TYPE': 'vfat', 'LABEL': 'cloudmd'}]
-             )},
+    "RbxCloudLower": {
+        "ds": "RbxCloud",
+        "mocks": [
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "vda1",
+                            "TYPE": "vfat",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "vda2",
+                            "TYPE": "ext4",
+                            "LABEL": "cloudimg-rootfs",
+                            "PARTUUID": uuid4(),
+                        },
+                        {"DEVNAME": "vdb", "TYPE": "vfat", "LABEL": "cloudmd"},
+                    ]
+                ),
+            },
         ],
     },
-    'Hetzner': {
-        'ds': 'Hetzner',
-        'files': {P_SYS_VENDOR: 'Hetzner\n'},
+    "Hetzner": {
+        "ds": "Hetzner",
+        "files": {P_SYS_VENDOR: "Hetzner\n"},
     },
-    'Hetzner-kenv': {
-        'ds': 'Hetzner',
-        'mocks': [
+    "Hetzner-kenv": {
+        "ds": "Hetzner",
+        "mocks": [
             MOCK_UNAME_IS_FREEBSD,
-            {'name': 'get_kenv_field', 'ret': 0, 'RET': 'Hetzner'}
+            {"name": "get_kenv_field", "ret": 0, "RET": "Hetzner"},
         ],
     },
-    'Hetzner-dmidecode': {
-        'ds': 'Hetzner',
-        'mocks': [
-            {'name': 'dmi_decode', 'ret': 0, 'RET': 'Hetzner'}
-        ],
+    "Hetzner-dmidecode": {
+        "ds": "Hetzner",
+        "mocks": [{"name": "dmi_decode", "ret": 0, "RET": "Hetzner"}],
     },
-    'IBMCloud-metadata': {
-        'ds': 'IBMCloud',
-        'mocks': [
+    "IBMCloud-metadata": {
+        "ds": "IBMCloud",
+        "mocks": [
             MOCK_VIRT_IS_XEN,
-            {'name': 'is_ibm_provisioning', 'ret': shell_false},
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'xvda1', 'TYPE': 'vfat', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'xvda2', 'TYPE': 'ext4',
-                   'LABEL': 'cloudimg-rootfs', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'xvdb', 'TYPE': 'vfat', 'LABEL': 'METADATA'}]),
-             },
+            {"name": "is_ibm_provisioning", "ret": shell_false},
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "xvda1",
+                            "TYPE": "vfat",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "xvda2",
+                            "TYPE": "ext4",
+                            "LABEL": "cloudimg-rootfs",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "xvdb",
+                            "TYPE": "vfat",
+                            "LABEL": "METADATA",
+                        },
+                    ]
+                ),
+            },
         ],
     },
-    'IBMCloud-config-2': {
-        'ds': 'IBMCloud',
-        'mocks': [
+    "IBMCloud-config-2": {
+        "ds": "IBMCloud",
+        "mocks": [
             MOCK_VIRT_IS_XEN,
-            {'name': 'is_ibm_provisioning', 'ret': shell_false},
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'xvda1', 'TYPE': 'ext3', 'PARTUUID': uuid4(),
-                   'UUID': uuid4(), 'LABEL': 'cloudimg-bootfs'},
-                  {'DEVNAME': 'xvdb', 'TYPE': 'vfat', 'LABEL': 'config-2',
-                   'UUID': ds_ibm.IBM_CONFIG_UUID},
-                  {'DEVNAME': 'xvda2', 'TYPE': 'ext4',
-                   'LABEL': 'cloudimg-rootfs', 'PARTUUID': uuid4(),
-                   'UUID': uuid4()},
-                  ]),
-             },
+            {"name": "is_ibm_provisioning", "ret": shell_false},
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "xvda1",
+                            "TYPE": "ext3",
+                            "PARTUUID": uuid4(),
+                            "UUID": uuid4(),
+                            "LABEL": "cloudimg-bootfs",
+                        },
+                        {
+                            "DEVNAME": "xvdb",
+                            "TYPE": "vfat",
+                            "LABEL": "config-2",
+                            "UUID": ds_ibm.IBM_CONFIG_UUID,
+                        },
+                        {
+                            "DEVNAME": "xvda2",
+                            "TYPE": "ext4",
+                            "LABEL": "cloudimg-rootfs",
+                            "PARTUUID": uuid4(),
+                            "UUID": uuid4(),
+                        },
+                    ]
+                ),
+            },
         ],
     },
-    'IBMCloud-nodisks': {
-        'ds': 'IBMCloud',
-        'mocks': [
+    "IBMCloud-nodisks": {
+        "ds": "IBMCloud",
+        "mocks": [
             MOCK_VIRT_IS_XEN,
-            {'name': 'is_ibm_provisioning', 'ret': shell_false},
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'xvda1', 'TYPE': 'vfat', 'PARTUUID': uuid4()},
-                  {'DEVNAME': 'xvda2', 'TYPE': 'ext4',
-                   'LABEL': 'cloudimg-rootfs', 'PARTUUID': uuid4()}]),
-             },
+            {"name": "is_ibm_provisioning", "ret": shell_false},
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "xvda1",
+                            "TYPE": "vfat",
+                            "PARTUUID": uuid4(),
+                        },
+                        {
+                            "DEVNAME": "xvda2",
+                            "TYPE": "ext4",
+                            "LABEL": "cloudimg-rootfs",
+                            "PARTUUID": uuid4(),
+                        },
+                    ]
+                ),
+            },
         ],
     },
-    'Oracle': {
-        'ds': 'Oracle',
-        'files': {
-            P_CHASSIS_ASSET_TAG: ds_oracle.CHASSIS_ASSET_TAG + '\n',
-        }
+    "Oracle": {
+        "ds": "Oracle",
+        "files": {
+            P_CHASSIS_ASSET_TAG: ds_oracle.CHASSIS_ASSET_TAG + "\n",
+        },
     },
-    'SmartOS-bhyve': {
-        'ds': 'SmartOS',
-        'mocks': [
+    "SmartOS-bhyve": {
+        "ds": "SmartOS",
+        "mocks": [
             MOCK_VIRT_IS_VM_OTHER,
-            {'name': 'blkid', 'ret': 0,
-             'out': blkid_out(
-                 [{'DEVNAME': 'vda1', 'TYPE': 'ext4',
-                   'PARTUUID': '49ec635a-01'},
-                  {'DEVNAME': 'vda2', 'TYPE': 'swap',
-                   'LABEL': 'cloudimg-swap', 'PARTUUID': '49ec635a-02'}]),
-             },
+            {
+                "name": "blkid",
+                "ret": 0,
+                "out": blkid_out(
+                    [
+                        {
+                            "DEVNAME": "vda1",
+                            "TYPE": "ext4",
+                            "PARTUUID": "49ec635a-01",
+                        },
+                        {
+                            "DEVNAME": "vda2",
+                            "TYPE": "swap",
+                            "LABEL": "cloudimg-swap",
+                            "PARTUUID": "49ec635a-02",
+                        },
+                    ]
+                ),
+            },
         ],
-        'files': {P_PRODUCT_NAME: 'SmartDC HVM\n'},
+        "files": {P_PRODUCT_NAME: "SmartDC HVM\n"},
     },
-    'SmartOS-lxbrand': {
-        'ds': 'SmartOS',
-        'mocks': [
+    "SmartOS-lxbrand": {
+        "ds": "SmartOS",
+        "mocks": [
             MOCK_VIRT_IS_CONTAINER_OTHER,
-            {'name': 'uname', 'ret': 0,
-             'out': ("Linux d43da87a-daca-60e8-e6d4-d2ed372662a3 4.3.0 "
-                     "BrandZ virtual linux x86_64 GNU/Linux")},
-            {'name': 'blkid', 'ret': 2, 'out': ''},
+            {
+                "name": "uname",
+                "ret": 0,
+                "out": (
+                    "Linux d43da87a-daca-60e8-e6d4-d2ed372662a3 4.3.0 "
+                    "BrandZ virtual linux x86_64 GNU/Linux"
+                ),
+            },
+            {"name": "blkid", "ret": 2, "out": ""},
         ],
-        'files': {ds_smartos.METADATA_SOCKFILE: 'would be a socket\n'},
+        "files": {ds_smartos.METADATA_SOCKFILE: "would be a socket\n"},
     },
-    'Ec2-ZStack': {
-        'ds': 'Ec2',
-        'files': {P_CHASSIS_ASSET_TAG: '123456.zstack.io\n'},
+    "Ec2-ZStack": {
+        "ds": "Ec2",
+        "files": {P_CHASSIS_ASSET_TAG: "123456.zstack.io\n"},
     },
-    'Ec2-E24Cloud': {
-        'ds': 'Ec2',
-        'files': {P_SYS_VENDOR: 'e24cloud\n'},
+    "Ec2-E24Cloud": {
+        "ds": "Ec2",
+        "files": {P_SYS_VENDOR: "e24cloud\n"},
     },
-    'Ec2-E24Cloud-negative': {
-        'ds': 'Ec2',
-        'files': {P_SYS_VENDOR: 'e24cloudyday\n'},
+    "Ec2-E24Cloud-negative": {
+        "ds": "Ec2",
+        "files": {P_SYS_VENDOR: "e24cloudyday\n"},
     },
-    'VMware-NoValidTransports': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-NoValidTransports": {
+        "ds": "VMware",
+        "mocks": [
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-EnvVar-NoData': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-EnvVar-NoData": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_metadata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_metadata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_vendordata",
+                "ret": 1,
             },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-EnvVar-NoVirtID': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-EnvVar-NoVirtID": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_metadata',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo_metadata",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_vendordata",
+                "ret": 1,
             },
         ],
     },
-    'VMware-EnvVar-Metadata': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-EnvVar-Metadata": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_metadata',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo_metadata",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_vendordata",
+                "ret": 1,
             },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-EnvVar-Userdata': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-EnvVar-Userdata": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_metadata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_metadata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_userdata',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo_userdata",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_vendordata",
+                "ret": 1,
             },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-EnvVar-Vendordata': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-EnvVar-Vendordata": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo",
+                "ret": 0,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_metadata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_metadata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_has_envvar_vmx_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_has_envvar_vmx_guestinfo_vendordata',
-                'ret': 0,
+                "name": "vmware_has_envvar_vmx_guestinfo_vendordata",
+                "ret": 0,
             },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-GuestInfo-NoData': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-GuestInfo-NoData": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_rpctool',
-                'ret': 0,
-                'out': '/usr/bin/vmware-rpctool',
+                "name": "vmware_has_rpctool",
+                "ret": 0,
+                "out": "/usr/bin/vmware-rpctool",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_metadata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_metadata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_rpctool_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_rpctool_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_vendordata",
+                "ret": 1,
             },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-GuestInfo-NoVirtID': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-GuestInfo-NoVirtID": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_rpctool',
-                'ret': 0,
-                'out': '/usr/bin/vmware-rpctool',
+                "name": "vmware_has_rpctool",
+                "ret": 0,
+                "out": "/usr/bin/vmware-rpctool",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_metadata',
-                'ret': 0,
-                'out': '---',
+                "name": "vmware_rpctool_guestinfo_metadata",
+                "ret": 0,
+                "out": "---",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_rpctool_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_vendordata",
+                "ret": 1,
             },
         ],
     },
-    'VMware-GuestInfo-Metadata': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-GuestInfo-Metadata": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_rpctool',
-                'ret': 0,
-                'out': '/usr/bin/vmware-rpctool',
+                "name": "vmware_has_rpctool",
+                "ret": 0,
+                "out": "/usr/bin/vmware-rpctool",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_metadata',
-                'ret': 0,
-                'out': '---',
+                "name": "vmware_rpctool_guestinfo_metadata",
+                "ret": 0,
+                "out": "---",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_rpctool_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_vendordata",
+                "ret": 1,
             },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-GuestInfo-Userdata': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-GuestInfo-Userdata": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_rpctool',
-                'ret': 0,
-                'out': '/usr/bin/vmware-rpctool',
+                "name": "vmware_has_rpctool",
+                "ret": 0,
+                "out": "/usr/bin/vmware-rpctool",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_metadata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_metadata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_rpctool_guestinfo_userdata',
-                'ret': 0,
-                'out': '---',
+                "name": "vmware_rpctool_guestinfo_userdata",
+                "ret": 0,
+                "out": "---",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_vendordata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_vendordata",
+                "ret": 1,
             },
             MOCK_VIRT_IS_VMWARE,
         ],
     },
-    'VMware-GuestInfo-Vendordata': {
-        'ds': 'VMware',
-        'mocks': [
+    "VMware-GuestInfo-Vendordata": {
+        "ds": "VMware",
+        "mocks": [
             {
-                'name': 'vmware_has_rpctool',
-                'ret': 0,
-                'out': '/usr/bin/vmware-rpctool',
+                "name": "vmware_has_rpctool",
+                "ret": 0,
+                "out": "/usr/bin/vmware-rpctool",
             },
             {
-                'name': 'vmware_rpctool_guestinfo_metadata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_metadata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_rpctool_guestinfo_userdata',
-                'ret': 1,
+                "name": "vmware_rpctool_guestinfo_userdata",
+                "ret": 1,
             },
             {
-                'name': 'vmware_rpctool_guestinfo_vendordata',
-                'ret': 0,
-                'out': '---',
+                "name": "vmware_rpctool_guestinfo_vendordata",
+                "ret": 0,
+                "out": "---",
             },
             MOCK_VIRT_IS_VMWARE,
         ],
diff --git a/tests/unittests/test_ec2_util.py b/tests/unittests/test_ec2_util.py
index e8e0b5b1..f447d295 100644
--- a/tests/unittests/test_ec2_util.py
+++ b/tests/unittests/test_ec2_util.py
@@ -2,178 +2,276 @@
 
 import httpretty as hp
 
-from tests.unittests import helpers
-
 from cloudinit import ec2_utils as eu
 from cloudinit import url_helper as uh
+from tests.unittests import helpers
 
 
 class TestEc2Util(helpers.HttprettyTestCase):
-    VERSION = 'latest'
+    VERSION = "latest"
 
     def test_userdata_fetch(self):
-        hp.register_uri(hp.GET,
-                        'http://169.254.169.254/%s/user-data' % (self.VERSION),
-                        body='stuff',
-                        status=200)
+        hp.register_uri(
+            hp.GET,
+            "http://169.254.169.254/%s/user-data" % (self.VERSION),
+            body="stuff",
+            status=200,
+        )
         userdata = eu.get_instance_userdata(self.VERSION)
-        self.assertEqual('stuff', userdata.decode('utf-8'))
+        self.assertEqual("stuff", userdata.decode("utf-8"))
 
     def test_userdata_fetch_fail_not_found(self):
-        hp.register_uri(hp.GET,
-                        'http://169.254.169.254/%s/user-data' % (self.VERSION),
-                        status=404)
+        hp.register_uri(
+            hp.GET,
+            "http://169.254.169.254/%s/user-data" % (self.VERSION),
+            status=404,
+        )
         userdata = eu.get_instance_userdata(self.VERSION, retries=0)
-        self.assertEqual('', userdata)
+        self.assertEqual("", userdata)
 
     def test_userdata_fetch_fail_server_dead(self):
-        hp.register_uri(hp.GET,
-                        'http://169.254.169.254/%s/user-data' % (self.VERSION),
-                        status=500)
+        hp.register_uri(
+            hp.GET,
+            "http://169.254.169.254/%s/user-data" % (self.VERSION),
+            status=500,
+        )
         userdata = eu.get_instance_userdata(self.VERSION, retries=0)
-        self.assertEqual('', userdata)
+        self.assertEqual("", userdata)
 
     def test_userdata_fetch_fail_server_not_found(self):
-        hp.register_uri(hp.GET,
-                        'http://169.254.169.254/%s/user-data' % (self.VERSION),
-                        status=404)
+        hp.register_uri(
+            hp.GET,
+            "http://169.254.169.254/%s/user-data" % (self.VERSION),
+            status=404,
+        )
         userdata = eu.get_instance_userdata(self.VERSION)
-        self.assertEqual('', userdata)
+        self.assertEqual("", userdata)
 
     def test_metadata_fetch_no_keys(self):
-        base_url = 'http://169.254.169.254/%s/meta-data/' % (self.VERSION)
-        hp.register_uri(hp.GET, base_url, status=200,
-                        body="\n".join(['hostname',
-                                        'instance-id',
-                                        'ami-launch-index']))
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'hostname'),
-                        status=200, body='ec2.fake.host.name.com')
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'instance-id'),
-                        status=200, body='123')
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'ami-launch-index'),
-                        status=200, body='1')
+        base_url = "http://169.254.169.254/%s/meta-data/" % (self.VERSION)
+        hp.register_uri(
+            hp.GET,
+            base_url,
+            status=200,
+            body="\n".join(["hostname", "instance-id", "ami-launch-index"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "hostname"),
+            status=200,
+            body="ec2.fake.host.name.com",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "instance-id"),
+            status=200,
+            body="123",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "ami-launch-index"),
+            status=200,
+            body="1",
+        )
         md = eu.get_instance_metadata(self.VERSION, retries=0)
-        self.assertEqual(md['hostname'], 'ec2.fake.host.name.com')
-        self.assertEqual(md['instance-id'], '123')
-        self.assertEqual(md['ami-launch-index'], '1')
+        self.assertEqual(md["hostname"], "ec2.fake.host.name.com")
+        self.assertEqual(md["instance-id"], "123")
+        self.assertEqual(md["ami-launch-index"], "1")
 
     def test_metadata_fetch_key(self):
-        base_url = 'http://169.254.169.254/%s/meta-data/' % (self.VERSION)
-        hp.register_uri(hp.GET, base_url, status=200,
-                        body="\n".join(['hostname',
-                                        'instance-id',
-                                        'public-keys/']))
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'hostname'),
-                        status=200, body='ec2.fake.host.name.com')
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'instance-id'),
-                        status=200, body='123')
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'public-keys/'),
-                        status=200, body='0=my-public-key')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'public-keys/0/openssh-key'),
-                        status=200, body='ssh-rsa AAAA.....wZEf my-public-key')
+        base_url = "http://169.254.169.254/%s/meta-data/" % (self.VERSION)
+        hp.register_uri(
+            hp.GET,
+            base_url,
+            status=200,
+            body="\n".join(["hostname", "instance-id", "public-keys/"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "hostname"),
+            status=200,
+            body="ec2.fake.host.name.com",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "instance-id"),
+            status=200,
+            body="123",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "public-keys/"),
+            status=200,
+            body="0=my-public-key",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "public-keys/0/openssh-key"),
+            status=200,
+            body="ssh-rsa AAAA.....wZEf my-public-key",
+        )
         md = eu.get_instance_metadata(self.VERSION, retries=0, timeout=0.1)
-        self.assertEqual(md['hostname'], 'ec2.fake.host.name.com')
-        self.assertEqual(md['instance-id'], '123')
-        self.assertEqual(1, len(md['public-keys']))
+        self.assertEqual(md["hostname"], "ec2.fake.host.name.com")
+        self.assertEqual(md["instance-id"], "123")
+        self.assertEqual(1, len(md["public-keys"]))
 
     def test_metadata_fetch_with_2_keys(self):
-        base_url = 'http://169.254.169.254/%s/meta-data/' % (self.VERSION)
-        hp.register_uri(hp.GET, base_url, status=200,
-                        body="\n".join(['hostname',
-                                        'instance-id',
-                                        'public-keys/']))
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'hostname'),
-                        status=200, body='ec2.fake.host.name.com')
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'instance-id'),
-                        status=200, body='123')
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'public-keys/'),
-                        status=200,
-                        body="\n".join(['0=my-public-key', '1=my-other-key']))
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'public-keys/0/openssh-key'),
-                        status=200, body='ssh-rsa AAAA.....wZEf my-public-key')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'public-keys/1/openssh-key'),
-                        status=200, body='ssh-rsa AAAA.....wZEf my-other-key')
+        base_url = "http://169.254.169.254/%s/meta-data/" % (self.VERSION)
+        hp.register_uri(
+            hp.GET,
+            base_url,
+            status=200,
+            body="\n".join(["hostname", "instance-id", "public-keys/"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "hostname"),
+            status=200,
+            body="ec2.fake.host.name.com",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "instance-id"),
+            status=200,
+            body="123",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "public-keys/"),
+            status=200,
+            body="\n".join(["0=my-public-key", "1=my-other-key"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "public-keys/0/openssh-key"),
+            status=200,
+            body="ssh-rsa AAAA.....wZEf my-public-key",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "public-keys/1/openssh-key"),
+            status=200,
+            body="ssh-rsa AAAA.....wZEf my-other-key",
+        )
         md = eu.get_instance_metadata(self.VERSION, retries=0, timeout=0.1)
-        self.assertEqual(md['hostname'], 'ec2.fake.host.name.com')
-        self.assertEqual(md['instance-id'], '123')
-        self.assertEqual(2, len(md['public-keys']))
+        self.assertEqual(md["hostname"], "ec2.fake.host.name.com")
+        self.assertEqual(md["instance-id"], "123")
+        self.assertEqual(2, len(md["public-keys"]))
 
     def test_metadata_fetch_bdm(self):
-        base_url = 'http://169.254.169.254/%s/meta-data/' % (self.VERSION)
-        hp.register_uri(hp.GET, base_url, status=200,
-                        body="\n".join(['hostname',
-                                        'instance-id',
-                                        'block-device-mapping/']))
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'hostname'),
-                        status=200, body='ec2.fake.host.name.com')
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'instance-id'),
-                        status=200, body='123')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'block-device-mapping/'),
-                        status=200,
-                        body="\n".join(['ami', 'ephemeral0']))
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'block-device-mapping/ami'),
-                        status=200,
-                        body="sdb")
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url,
-                                       'block-device-mapping/ephemeral0'),
-                        status=200,
-                        body="sdc")
+        base_url = "http://169.254.169.254/%s/meta-data/" % (self.VERSION)
+        hp.register_uri(
+            hp.GET,
+            base_url,
+            status=200,
+            body="\n".join(
+                ["hostname", "instance-id", "block-device-mapping/"]
+            ),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "hostname"),
+            status=200,
+            body="ec2.fake.host.name.com",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "instance-id"),
+            status=200,
+            body="123",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "block-device-mapping/"),
+            status=200,
+            body="\n".join(["ami", "ephemeral0"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "block-device-mapping/ami"),
+            status=200,
+            body="sdb",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "block-device-mapping/ephemeral0"),
+            status=200,
+            body="sdc",
+        )
         md = eu.get_instance_metadata(self.VERSION, retries=0, timeout=0.1)
-        self.assertEqual(md['hostname'], 'ec2.fake.host.name.com')
-        self.assertEqual(md['instance-id'], '123')
-        bdm = md['block-device-mapping']
+        self.assertEqual(md["hostname"], "ec2.fake.host.name.com")
+        self.assertEqual(md["instance-id"], "123")
+        bdm = md["block-device-mapping"]
         self.assertEqual(2, len(bdm))
-        self.assertEqual(bdm['ami'], 'sdb')
-        self.assertEqual(bdm['ephemeral0'], 'sdc')
+        self.assertEqual(bdm["ami"], "sdb")
+        self.assertEqual(bdm["ephemeral0"], "sdc")
 
     def test_metadata_no_security_credentials(self):
-        base_url = 'http://169.254.169.254/%s/meta-data/' % (self.VERSION)
-        hp.register_uri(hp.GET, base_url, status=200,
-                        body="\n".join(['instance-id',
-                                        'iam/']))
-        hp.register_uri(hp.GET, uh.combine_url(base_url, 'instance-id'),
-                        status=200, body='i-0123451689abcdef0')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'iam/'),
-                        status=200,
-                        body="\n".join(['info/', 'security-credentials/']))
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'iam/info/'),
-                        status=200,
-                        body='LastUpdated')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'iam/info/LastUpdated'),
-                        status=200, body='2016-10-27T17:29:39Z')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url, 'iam/security-credentials/'),
-                        status=200,
-                        body='ReadOnly/')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(base_url,
-                                       'iam/security-credentials/ReadOnly/'),
-                        status=200,
-                        body="\n".join(['LastUpdated', 'Expiration']))
-        hp.register_uri(hp.GET,
-                        uh.combine_url(
-                            base_url,
-                            'iam/security-credentials/ReadOnly/LastUpdated'),
-                        status=200, body='2016-10-27T17:28:17Z')
-        hp.register_uri(hp.GET,
-                        uh.combine_url(
-                            base_url,
-                            'iam/security-credentials/ReadOnly/Expiration'),
-                        status=200, body='2016-10-28T00:00:34Z')
+        base_url = "http://169.254.169.254/%s/meta-data/" % (self.VERSION)
+        hp.register_uri(
+            hp.GET,
+            base_url,
+            status=200,
+            body="\n".join(["instance-id", "iam/"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "instance-id"),
+            status=200,
+            body="i-0123451689abcdef0",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "iam/"),
+            status=200,
+            body="\n".join(["info/", "security-credentials/"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "iam/info/"),
+            status=200,
+            body="LastUpdated",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "iam/info/LastUpdated"),
+            status=200,
+            body="2016-10-27T17:29:39Z",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "iam/security-credentials/"),
+            status=200,
+            body="ReadOnly/",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(base_url, "iam/security-credentials/ReadOnly/"),
+            status=200,
+            body="\n".join(["LastUpdated", "Expiration"]),
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(
+                base_url, "iam/security-credentials/ReadOnly/LastUpdated"
+            ),
+            status=200,
+            body="2016-10-27T17:28:17Z",
+        )
+        hp.register_uri(
+            hp.GET,
+            uh.combine_url(
+                base_url, "iam/security-credentials/ReadOnly/Expiration"
+            ),
+            status=200,
+            body="2016-10-28T00:00:34Z",
+        )
         md = eu.get_instance_metadata(self.VERSION, retries=0, timeout=0.1)
-        self.assertEqual(md['instance-id'], 'i-0123451689abcdef0')
-        iam = md['iam']
+        self.assertEqual(md["instance-id"], "i-0123451689abcdef0")
+        iam = md["iam"]
         self.assertEqual(1, len(iam))
-        self.assertEqual(iam['info']['LastUpdated'], '2016-10-27T17:29:39Z')
-        self.assertNotIn('security-credentials', iam)
+        self.assertEqual(iam["info"]["LastUpdated"], "2016-10-27T17:29:39Z")
+        self.assertNotIn("security-credentials", iam)
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_event.py b/tests/unittests/test_event.py
index 3da4c70c..2ea91bb2 100644
--- a/tests/unittests/test_event.py
+++ b/tests/unittests/test_event.py
@@ -1,26 +1,26 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 """Tests related to cloudinit.event module."""
-from cloudinit.event import EventType, EventScope, userdata_to_events
+from cloudinit.event import EventScope, EventType, userdata_to_events
 
 
 class TestEvent:
     def test_userdata_to_events(self):
-        userdata = {'network': {'when': ['boot']}}
+        userdata = {"network": {"when": ["boot"]}}
         expected = {EventScope.NETWORK: {EventType.BOOT}}
         assert expected == userdata_to_events(userdata)
 
     def test_invalid_scope(self, caplog):
-        userdata = {'networkasdfasdf': {'when': ['boot']}}
+        userdata = {"networkasdfasdf": {"when": ["boot"]}}
         userdata_to_events(userdata)
         assert (
             "'networkasdfasdf' is not a valid EventScope! Update data "
-            "will be ignored for 'networkasdfasdf' scope"
-        ) in caplog.text
+            "will be ignored for 'networkasdfasdf' scope" in caplog.text
+        )
 
     def test_invalid_event(self, caplog):
-        userdata = {'network': {'when': ['bootasdfasdf']}}
+        userdata = {"network": {"when": ["bootasdfasdf"]}}
         userdata_to_events(userdata)
         assert (
             "'bootasdfasdf' is not a valid EventType! Update data "
-            "will be ignored for 'network' scope"
-        ) in caplog.text
+            "will be ignored for 'network' scope" in caplog.text
+        )
diff --git a/tests/unittests/test_features.py b/tests/unittests/test_features.py
index d7a7226d..141de55b 100644
--- a/tests/unittests/test_features.py
+++ b/tests/unittests/test_features.py
@@ -4,10 +4,11 @@
 This file is for testing the feature flag functionality itself,
 NOT for testing any individual feature flag
 """
-import pytest
 import sys
 from pathlib import Path
 
+import pytest
+
 import cloudinit
 
 
@@ -24,37 +25,44 @@ def create_override(request):
     features and feature_overrides modules to how they were before
     the test started
     """
-    override_path = Path(cloudinit.__file__).parent / 'feature_overrides.py'
+    override_path = Path(cloudinit.__file__).parent / "feature_overrides.py"
     if override_path.exists():
-        raise Exception("feature_overrides.py unexpectedly exists! "
-                        "Remove it to run this test.")
-    with override_path.open('w') as f:
+        raise Exception(
+            "feature_overrides.py unexpectedly exists! "
+            "Remove it to run this test."
+        )
+    with override_path.open("w") as f:
         for key, value in request.param.items():
-            f.write('{} = {}\n'.format(key, value))
+            f.write("{} = {}\n".format(key, value))
 
-    sys.modules.pop('cloudinit.features', None)
+    sys.modules.pop("cloudinit.features", None)
 
     yield
 
     override_path.unlink()
-    sys.modules.pop('cloudinit.feature_overrides', None)
+    sys.modules.pop("cloudinit.feature_overrides", None)
 
 
 class TestFeatures:
     def test_feature_without_override(self):
         from cloudinit.features import ERROR_ON_USER_DATA_FAILURE
+
         assert ERROR_ON_USER_DATA_FAILURE is True
 
-    @pytest.mark.parametrize('create_override',
-                             [{'ERROR_ON_USER_DATA_FAILURE': False}],
-                             indirect=True)
+    @pytest.mark.parametrize(
+        "create_override",
+        [{"ERROR_ON_USER_DATA_FAILURE": False}],
+        indirect=True,
+    )
     def test_feature_with_override(self, create_override):
         from cloudinit.features import ERROR_ON_USER_DATA_FAILURE
+
         assert ERROR_ON_USER_DATA_FAILURE is False
 
-    @pytest.mark.parametrize('create_override',
-                             [{'SPAM': True}],
-                             indirect=True)
+    @pytest.mark.parametrize(
+        "create_override", [{"SPAM": True}], indirect=True
+    )
     def test_feature_only_in_override(self, create_override):
         from cloudinit.features import SPAM
+
         assert SPAM is True
diff --git a/tests/unittests/test_gpg.py b/tests/unittests/test_gpg.py
index ceada49a..c3772e3f 100644
--- a/tests/unittests/test_gpg.py
+++ b/tests/unittests/test_gpg.py
@@ -1,12 +1,11 @@
-import pytest
 from unittest import mock
 
-from cloudinit import gpg
-from cloudinit import subp
+import pytest
 
+from cloudinit import gpg, subp
 from tests.unittests.helpers import CiTestCase
 
-TEST_KEY_HUMAN = '''
+TEST_KEY_HUMAN = """
 /etc/apt/cloud-init.gpg.d/my_key.gpg
 --------------------------------------------
 pub   rsa4096 2021-10-22 [SC]
@@ -14,9 +13,9 @@ pub   rsa4096 2021-10-22 [SC]
 uid           [ unknown] Brett Holman <brett.holman@canonical.com>
 sub   rsa4096 2021-10-22 [A]
 sub   rsa4096 2021-10-22 [E]
-'''
+"""
 
-TEST_KEY_MACHINE = '''
+TEST_KEY_MACHINE = """
 tru::1:1635129362:0:3:1:5
 pub:-:4096:1:F83F77129A5EBD85:1634912922:::-:::scESCA::::::23::0:
 fpr:::::::::3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85:
@@ -26,13 +25,13 @@ sub:-:4096:1:544B39C9A9141F04:1634912922::::::a::::::23:
 fpr:::::::::8BD901490D6EC986D03D6F0D544B39C9A9141F04:
 sub:-:4096:1:F45D9443F0A87092:1634912922::::::e::::::23:
 fpr:::::::::8CCCB332317324F030A45B19F45D9443F0A87092:
-'''
+"""
 
-TEST_KEY_FINGERPRINT_HUMAN = \
-    '3A3E F34D FDED B3B7 F3FD  F603 F83F 7712 9A5E BD85'
+TEST_KEY_FINGERPRINT_HUMAN = (
+    "3A3E F34D FDED B3B7 F3FD  F603 F83F 7712 9A5E BD85"
+)
 
-TEST_KEY_FINGERPRINT_MACHINE = \
-    '3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85'
+TEST_KEY_FINGERPRINT_MACHINE = "3A3EF34DFDEDB3B7F3FDF603F83F77129A5EBD85"
 
 
 class TestGPGCommands:
@@ -41,45 +40,45 @@ class TestGPGCommands:
         internally.
         """
         with mock.patch.object(
-                subp,
-                'subp',
-                side_effect=subp.ProcessExecutionError):
+            subp, "subp", side_effect=subp.ProcessExecutionError
+        ):
             with pytest.raises(subp.ProcessExecutionError):
-                gpg.dearmor('garbage key value')
+                gpg.dearmor("garbage key value")
 
     def test_gpg_list_args(self):
-        """Verify correct command gets called to list keys
-        """
+        """Verify correct command gets called to list keys"""
         no_colons = [
-            'gpg',
-            '--with-fingerprint',
-            '--no-default-keyring',
-            '--list-keys',
-            '--keyring',
-            'key']
+            "gpg",
+            "--with-fingerprint",
+            "--no-default-keyring",
+            "--list-keys",
+            "--keyring",
+            "key",
+        ]
         colons = [
-            'gpg',
-            '--with-fingerprint',
-            '--no-default-keyring',
-            '--list-keys',
-            '--keyring',
-            '--with-colons',
-            'key']
-        with mock.patch.object(subp, 'subp', return_value=('', '')) as m_subp:
-            gpg.list('key')
+            "gpg",
+            "--with-fingerprint",
+            "--no-default-keyring",
+            "--list-keys",
+            "--keyring",
+            "--with-colons",
+            "key",
+        ]
+        with mock.patch.object(subp, "subp", return_value=("", "")) as m_subp:
+            gpg.list("key")
             assert mock.call(colons, capture=True) == m_subp.call_args
 
-            gpg.list('key', human_output=True)
+            gpg.list("key", human_output=True)
             test_calls = mock.call((no_colons), capture=True)
             assert test_calls == m_subp.call_args
 
     def test_gpg_dearmor_args(self):
-        """Verify correct command gets called to dearmor keys
-        """
-        with mock.patch.object(subp, 'subp', return_value=('', '')) as m_subp:
-            gpg.dearmor('key')
+        """Verify correct command gets called to dearmor keys"""
+        with mock.patch.object(subp, "subp", return_value=("", "")) as m_subp:
+            gpg.dearmor("key")
             test_call = mock.call(
-                ["gpg", "--dearmor"], data='key', decode=False)
+                ["gpg", "--dearmor"], data="key", decode=False
+            )
             assert test_call == m_subp.call_args
 
     @mock.patch("cloudinit.gpg.time.sleep")
@@ -91,18 +90,21 @@ class TestGPGCommands:
             """retry should be done on gpg receive keys failure."""
             retries = (1, 2, 4)
             my_exc = subp.ProcessExecutionError(
-                stdout='', stderr='', exit_code=2, cmd=['mycmd'])
-            m_subp.side_effect = (my_exc, my_exc, ('', ''))
+                stdout="", stderr="", exit_code=2, cmd=["mycmd"]
+            )
+            m_subp.side_effect = (my_exc, my_exc, ("", ""))
             gpg.recv_key("ABCD", "keyserver.example.com", retries=retries)
             self.assertEqual(
-                [mock.call(1), mock.call(2)], m_sleep.call_args_list)
+                [mock.call(1), mock.call(2)], m_sleep.call_args_list
+            )
 
         def test_raises_error_after_retries(self, m_subp, m_sleep):
             """If the final run fails, error should be raised."""
             naplen = 1
             keyid, keyserver = ("ABCD", "keyserver.example.com")
             m_subp.side_effect = subp.ProcessExecutionError(
-                stdout='', stderr='', exit_code=2, cmd=['mycmd'])
+                stdout="", stderr="", exit_code=2, cmd=["mycmd"]
+            )
             with self.assertRaises(ValueError) as rcm:
                 gpg.recv_key(keyid, keyserver, retries=(naplen,))
             self.assertIn(keyid, str(rcm.exception))
@@ -112,7 +114,8 @@ class TestGPGCommands:
         def test_no_retries_on_none(self, m_subp, m_sleep):
             """retry should not be done if retries is None."""
             m_subp.side_effect = subp.ProcessExecutionError(
-                stdout='', stderr='', exit_code=2, cmd=['mycmd'])
+                stdout="", stderr="", exit_code=2, cmd=["mycmd"]
+            )
             with self.assertRaises(ValueError):
                 gpg.recv_key("ABCD", "keyserver.example.com", retries=None)
             m_sleep.assert_not_called()
@@ -121,10 +124,16 @@ class TestGPGCommands:
             """Verify gpg is called with expected args."""
             key, keyserver = ("DEADBEEF", "keyserver.example.com")
             retries = (1, 2, 4)
-            m_subp.return_value = ('', '')
+            m_subp.return_value = ("", "")
             gpg.recv_key(key, keyserver, retries=retries)
             m_subp.assert_called_once_with(
-                ['gpg', '--no-tty',
-                 '--keyserver=%s' % keyserver, '--recv-keys', key],
-                capture=True)
+                [
+                    "gpg",
+                    "--no-tty",
+                    "--keyserver=%s" % keyserver,
+                    "--recv-keys",
+                    key,
+                ],
+                capture=True,
+            )
             m_sleep.assert_not_called()
diff --git a/tests/unittests/test_helpers.py b/tests/unittests/test_helpers.py
index f491f8cd..69291597 100644
--- a/tests/unittests/test_helpers.py
+++ b/tests/unittests/test_helpers.py
@@ -5,9 +5,8 @@
 import os
 from pathlib import Path
 
-from tests.unittests import helpers as test_helpers
-
 from cloudinit import sources
+from tests.unittests import helpers as test_helpers
 
 
 class MyDataSource(sources.DataSource):
@@ -25,8 +24,9 @@ class TestPaths(test_helpers.ResourceUsingTestCase):
         mypaths = self.getCloudPaths(myds)
 
         self.assertEqual(
-            os.path.join(mypaths.cloud_dir, 'instances', safe_iid),
-            mypaths.get_ipath())
+            os.path.join(mypaths.cloud_dir, "instances", safe_iid),
+            mypaths.get_ipath(),
+        )
 
     def test_get_ipath_and_empty_instance_id_returns_none(self):
         myds = MyDataSource(sys_cfg={}, distro=None, paths={})
@@ -52,8 +52,7 @@ class Testcloud_init_project_dir:
 
     def test_top_level_dir(self):
         """Assert the location of the top project directory is correct"""
-        assert (self.top_dir ==
-                self._get_top_level_dir_alt_implementation())
+        assert self.top_dir == self._get_top_level_dir_alt_implementation()
 
     def test_cloud_init_project_dir(self):
         """Assert cloud_init_project_dir produces an expected location
diff --git a/tests/unittests/test_log.py b/tests/unittests/test_log.py
index 3d1b9582..87c69dbb 100644
--- a/tests/unittests/test_log.py
+++ b/tests/unittests/test_log.py
@@ -13,7 +13,6 @@ from tests.unittests.helpers import CiTestCase
 
 
 class TestCloudInitLogger(CiTestCase):
-
     def setUp(self):
         # set up a logger like cloud-init does in setupLogging, but instead
         # of sys.stderr, we'll plug in a StringIO() object so we can see
@@ -26,7 +25,7 @@ class TestCloudInitLogger(CiTestCase):
         console.setLevel(ci_logging.DEBUG)
         self.ci_root.addHandler(console)
         self.ci_root.setLevel(ci_logging.DEBUG)
-        self.LOG = logging.getLogger('test_cloudinit_logger')
+        self.LOG = logging.getLogger("test_cloudinit_logger")
 
     def test_logger_uses_gmtime(self):
         """Test that log message have timestamp in UTC (gmtime)"""
@@ -43,15 +42,16 @@ class TestCloudInitLogger(CiTestCase):
         # utc_after : 2017-08-23 14:19:43.570064
 
         utc_before = datetime.datetime.utcnow() - datetime.timedelta(0, 0.5)
-        self.LOG.error('Test message')
+        self.LOG.error("Test message")
         utc_after = datetime.datetime.utcnow() + datetime.timedelta(0, 0.5)
 
         # extract timestamp from log:
         # 2017-08-23 14:19:43,069 - test_log.py[ERROR]: Test message
         logstr = self.ci_logs.getvalue().splitlines()[0]
-        timestampstr = logstr.split(' - ')[0]
-        parsed_dt = datetime.datetime.strptime(timestampstr,
-                                               CLOUD_INIT_ASCTIME_FMT)
+        timestampstr = logstr.split(" - ")[0]
+        parsed_dt = datetime.datetime.strptime(
+            timestampstr, CLOUD_INIT_ASCTIME_FMT
+        )
 
         self.assertLess(utc_before, parsed_dt)
         self.assertLess(parsed_dt, utc_after)
diff --git a/tests/unittests/test_merging.py b/tests/unittests/test_merging.py
index 48ab6602..cf484dda 100644
--- a/tests/unittests/test_merging.py
+++ b/tests/unittests/test_merging.py
@@ -1,13 +1,5 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from tests.unittests import helpers
-
-from cloudinit.handlers import cloud_config
-from cloudinit.handlers import (CONTENT_START, CONTENT_END)
-
-from cloudinit import helpers as c_helpers
-from cloudinit import util
-
 import collections
 import glob
 import os
@@ -15,6 +7,11 @@ import random
 import re
 import string
 
+from cloudinit import helpers as c_helpers
+from cloudinit import util
+from cloudinit.handlers import CONTENT_END, CONTENT_START, cloud_config
+from tests.unittests import helpers
+
 SOURCE_PAT = "source*.*yaml"
 EXPECTED_PAT = "expected%s.yaml"
 TYPES = [dict, str, list, tuple, None, int]
@@ -43,7 +40,7 @@ def _old_mergemanydict(*args):
 
 
 def _random_str(rand):
-    base = ''
+    base = ""
     for _i in range(rand.randint(1, 2 ** 8)):
         base += rand.choice(string.ascii_letters + string.digits)
     return base
@@ -98,7 +95,7 @@ def make_dict(max_depth, seed=None):
 
 class TestSimpleRun(helpers.ResourceUsingTestCase):
     def _load_merge_files(self):
-        merge_root = helpers.resourceLocation('merge_sources')
+        merge_root = helpers.resourceLocation("merge_sources")
         tests = []
         source_ids = collections.defaultdict(list)
         expected_files = {}
@@ -106,8 +103,9 @@ class TestSimpleRun(helpers.ResourceUsingTestCase):
             base_fn = os.path.basename(fn)
             file_id = re.match(r"source(\d+)\-(\d+)[.]yaml", base_fn)
             if not file_id:
-                raise IOError("File %s does not have a numeric identifier"
-                              % (fn))
+                raise IOError(
+                    "File %s does not have a numeric identifier" % (fn)
+                )
             file_id = int(file_id.group(1))
             source_ids[file_id].append(fn)
             expected_fn = os.path.join(merge_root, EXPECTED_PAT % (file_id))
@@ -141,29 +139,31 @@ class TestSimpleRun(helpers.ResourceUsingTestCase):
         cc_handler = cloud_config.CloudConfigPartHandler(paths)
         cc_handler.cloud_fn = None
         for (payloads, (expected_merge, expected_fn)) in tests:
-            cc_handler.handle_part(None, CONTENT_START, None,
-                                   None, None, None)
+            cc_handler.handle_part(None, CONTENT_START, None, None, None, None)
             merging_fns = []
             for (fn, contents) in payloads:
-                cc_handler.handle_part(None, None, "%s.yaml" % (fn),
-                                       contents, None, {})
+                cc_handler.handle_part(
+                    None, None, "%s.yaml" % (fn), contents, None, {}
+                )
                 merging_fns.append(fn)
             merged_buf = cc_handler.cloud_buf
-            cc_handler.handle_part(None, CONTENT_END, None,
-                                   None, None, None)
+            cc_handler.handle_part(None, CONTENT_END, None, None, None, None)
             fail_msg = "Equality failure on checking %s with %s: %s != %s"
-            fail_msg = fail_msg % (expected_fn,
-                                   ",".join(merging_fns), merged_buf,
-                                   expected_merge)
+            fail_msg = fail_msg % (
+                expected_fn,
+                ",".join(merging_fns),
+                merged_buf,
+                expected_merge,
+            )
             self.assertEqual(expected_merge, merged_buf, msg=fail_msg)
 
     def test_compat_merges_dict(self):
         a = {
-            '1': '2',
-            'b': 'c',
+            "1": "2",
+            "b": "c",
         }
         b = {
-            'b': 'e',
+            "b": "e",
         }
         c = _old_mergedict(a, b)
         d = util.mergemanydict([a, b])
@@ -171,53 +171,53 @@ class TestSimpleRun(helpers.ResourceUsingTestCase):
 
     def test_compat_merges_dict2(self):
         a = {
-            'Blah': 1,
-            'Blah2': 2,
-            'Blah3': 3,
+            "Blah": 1,
+            "Blah2": 2,
+            "Blah3": 3,
         }
         b = {
-            'Blah': 1,
-            'Blah2': 2,
-            'Blah3': [1],
+            "Blah": 1,
+            "Blah2": 2,
+            "Blah3": [1],
         }
         c = _old_mergedict(a, b)
         d = util.mergemanydict([a, b])
         self.assertEqual(c, d)
 
     def test_compat_merges_list(self):
-        a = {'b': [1, 2, 3]}
-        b = {'b': [4, 5]}
-        c = {'b': [6, 7]}
+        a = {"b": [1, 2, 3]}
+        b = {"b": [4, 5]}
+        c = {"b": [6, 7]}
         e = _old_mergemanydict(a, b, c)
         f = util.mergemanydict([a, b, c])
         self.assertEqual(e, f)
 
     def test_compat_merges_str(self):
-        a = {'b': "hi"}
-        b = {'b': "howdy"}
-        c = {'b': "hallo"}
+        a = {"b": "hi"}
+        b = {"b": "howdy"}
+        c = {"b": "hallo"}
         e = _old_mergemanydict(a, b, c)
         f = util.mergemanydict([a, b, c])
         self.assertEqual(e, f)
 
     def test_compat_merge_sub_dict(self):
         a = {
-            '1': '2',
-            'b': {
-                'f': 'g',
-                'e': 'c',
-                'h': 'd',
-                'hh': {
-                    '1': 2,
+            "1": "2",
+            "b": {
+                "f": "g",
+                "e": "c",
+                "h": "d",
+                "hh": {
+                    "1": 2,
                 },
-            }
+            },
         }
         b = {
-            'b': {
-                'e': 'c',
-                'hh': {
-                    '3': 4,
-                }
+            "b": {
+                "e": "c",
+                "hh": {
+                    "3": 4,
+                },
             }
         }
         c = _old_mergedict(a, b)
@@ -226,14 +226,14 @@ class TestSimpleRun(helpers.ResourceUsingTestCase):
 
     def test_compat_merge_sub_dict2(self):
         a = {
-            '1': '2',
-            'b': {
-                'f': 'g',
-            }
+            "1": "2",
+            "b": {
+                "f": "g",
+            },
         }
         b = {
-            'b': {
-                'e': 'c',
+            "b": {
+                "e": "c",
             }
         }
         c = _old_mergedict(a, b)
@@ -242,18 +242,19 @@ class TestSimpleRun(helpers.ResourceUsingTestCase):
 
     def test_compat_merge_sub_list(self):
         a = {
-            '1': '2',
-            'b': {
-                'f': ['1'],
-            }
+            "1": "2",
+            "b": {
+                "f": ["1"],
+            },
         }
         b = {
-            'b': {
-                'f': [],
+            "b": {
+                "f": [],
             }
         }
         c = _old_mergedict(a, b)
         d = util.mergemanydict([a, b])
         self.assertEqual(c, d)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_net.py b/tests/unittests/test_net.py
index b5c38c55..66a47b0f 100644
--- a/tests/unittests/test_net.py
+++ b/tests/unittests/test_net.py
@@ -1,20 +1,5 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import net
-from cloudinit import distros
-from cloudinit.net import cmdline
-from cloudinit.net import (
-    eni, interface_has_own_mac, natural_sort_key, netplan, network_state,
-    renderers, sysconfig, networkd)
-from cloudinit.sources.helpers import openstack
-from cloudinit import temp_utils
-from cloudinit import subp
-from cloudinit import util
-from cloudinit import safeyaml as yaml
-
-from tests.unittests.helpers import (
-    CiTestCase, FilesystemMockingTestCase, dir2dict, mock, populate_dir)
-
 import base64
 import copy
 import gzip
@@ -23,9 +8,32 @@ import json
 import os
 import re
 import textwrap
-from yaml.serializer import Serializer
 
 import pytest
+from yaml.serializer import Serializer
+
+from cloudinit import distros, net
+from cloudinit import safeyaml as yaml
+from cloudinit import subp, temp_utils, util
+from cloudinit.net import (
+    cmdline,
+    eni,
+    interface_has_own_mac,
+    natural_sort_key,
+    netplan,
+    network_state,
+    networkd,
+    renderers,
+    sysconfig,
+)
+from cloudinit.sources.helpers import openstack
+from tests.unittests.helpers import (
+    CiTestCase,
+    FilesystemMockingTestCase,
+    dir2dict,
+    mock,
+    populate_dir,
+)
 
 DHCP_CONTENT_1 = """
 DEVICE='eth0'
@@ -48,15 +56,19 @@ DOMAINSEARCH='foo.com'
 """
 
 DHCP_EXPECTED_1 = {
-    'name': 'eth0',
-    'type': 'physical',
-    'subnets': [{'broadcast': '192.168.122.255',
-                 'control': 'manual',
-                 'gateway': '192.168.122.1',
-                 'dns_search': ['foo.com'],
-                 'type': 'dhcp',
-                 'netmask': '255.255.255.0',
-                 'dns_nameservers': ['192.168.122.1']}],
+    "name": "eth0",
+    "type": "physical",
+    "subnets": [
+        {
+            "broadcast": "192.168.122.255",
+            "control": "manual",
+            "gateway": "192.168.122.1",
+            "dns_search": ["foo.com"],
+            "type": "dhcp",
+            "netmask": "255.255.255.0",
+            "dns_nameservers": ["192.168.122.1"],
+        }
+    ],
 }
 
 DHCP6_CONTENT_1 = """
@@ -73,12 +85,17 @@ DNSDOMAIN=
 """
 
 DHCP6_EXPECTED_1 = {
-    'name': 'eno1',
-    'type': 'physical',
-    'subnets': [{'control': 'manual',
-                 'dns_nameservers': ['2001:67c:1562:8010::2:1'],
-                 'netmask': '64',
-                 'type': 'dhcp6'}]}
+    "name": "eno1",
+    "type": "physical",
+    "subnets": [
+        {
+            "control": "manual",
+            "dns_nameservers": ["2001:67c:1562:8010::2:1"],
+            "netmask": "64",
+            "type": "dhcp6",
+        }
+    ],
+}
 
 
 STATIC_CONTENT_1 = """
@@ -97,14 +114,20 @@ DOMAINSEARCH='foo.com'
 """
 
 STATIC_EXPECTED_1 = {
-    'name': 'eth1',
-    'type': 'physical',
-    'subnets': [{'broadcast': '10.0.0.255', 'control': 'manual',
-                 'gateway': '10.0.0.1',
-                 'dns_search': ['foo.com'], 'type': 'static',
-                 'netmask': '255.255.255.0',
-                 'dns_nameservers': ['10.0.1.1'],
-                 'address': '10.0.0.2'}],
+    "name": "eth1",
+    "type": "physical",
+    "subnets": [
+        {
+            "broadcast": "10.0.0.255",
+            "control": "manual",
+            "gateway": "10.0.0.1",
+            "dns_search": ["foo.com"],
+            "type": "static",
+            "netmask": "255.255.255.0",
+            "dns_nameservers": ["10.0.1.1"],
+            "address": "10.0.0.2",
+        }
+    ],
 }
 
 V1_NAMESERVER_ALIAS = """
@@ -471,34 +494,42 @@ ethernets:
 # Examples (and expected outputs for various renderers).
 OS_SAMPLES = [
     {
-        'in_data': {
+        "in_data": {
             "services": [{"type": "dns", "address": "172.19.0.12"}],
-            "networks": [{
-                "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
-                "type": "ipv4", "netmask": "255.255.252.0",
-                "link": "tap1a81968a-79",
-                "routes": [{
-                    "netmask": "0.0.0.0",
-                    "network": "0.0.0.0",
-                    "gateway": "172.19.3.254",
-                }],
-                "ip_address": "172.19.1.34", "id": "network0"
-            }],
+            "networks": [
+                {
+                    "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
+                    "type": "ipv4",
+                    "netmask": "255.255.252.0",
+                    "link": "tap1a81968a-79",
+                    "routes": [
+                        {
+                            "netmask": "0.0.0.0",
+                            "network": "0.0.0.0",
+                            "gateway": "172.19.3.254",
+                        }
+                    ],
+                    "ip_address": "172.19.1.34",
+                    "id": "network0",
+                }
+            ],
             "links": [
                 {
                     "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-                    "mtu": None, "type": "bridge", "id":
-                    "tap1a81968a-79",
-                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+                    "mtu": None,
+                    "type": "bridge",
+                    "id": "tap1a81968a-79",
+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f",
                 },
             ],
         },
-        'in_macs': {
-            'fa:16:3e:ed:9a:59': 'eth0',
+        "in_macs": {
+            "fa:16:3e:ed:9a:59": "eth0",
         },
-        'out_sysconfig_opensuse': [
-            ('etc/sysconfig/network/ifcfg-eth0',
-             """
+        "out_sysconfig_opensuse": [
+            (
+                "etc/sysconfig/network/ifcfg-eth0",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 BOOTPROTO=static
@@ -506,26 +537,39 @@ IPADDR=172.19.1.34
 LLADDR=fa:16:3e:ed:9a:59
 NETMASK=255.255.252.0
 STARTMODE=auto
-""".lstrip()),
-            ('etc/resolv.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/resolv.conf",
+                """
 ; Created by cloud-init on instance boot automatically, do not edit.
 ;
 nameserver 172.19.0.12
-""".lstrip()),
-            ('etc/NetworkManager/conf.d/99-cloud-init.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/NetworkManager/conf.d/99-cloud-init.conf",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 [main]
 dns = none
-""".lstrip()),
-            ('etc/udev/rules.d/85-persistent-net-cloud-init.rules',
-             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
-                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))],
-        'out_sysconfig_rhel': [
-            ('etc/sysconfig/network-scripts/ifcfg-eth0',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/udev/rules.d/85-persistent-net-cloud-init.rules",
+                "".join(
+                    [
+                        'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
+                        'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
+                    ]
+                ),
+            ),
+        ],
+        "out_sysconfig_rhel": [
+            (
+                "etc/sysconfig/network-scripts/ifcfg-eth0",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 BOOTPROTO=none
@@ -539,60 +583,82 @@ NM_CONTROLLED=no
 ONBOOT=yes
 TYPE=Ethernet
 USERCTL=no
-""".lstrip()),
-            ('etc/resolv.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/resolv.conf",
+                """
 ; Created by cloud-init on instance boot automatically, do not edit.
 ;
 nameserver 172.19.0.12
-""".lstrip()),
-            ('etc/NetworkManager/conf.d/99-cloud-init.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/NetworkManager/conf.d/99-cloud-init.conf",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 [main]
 dns = none
-""".lstrip()),
-            ('etc/udev/rules.d/70-persistent-net.rules',
-             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
-                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))]
-
+""".lstrip(),
+            ),
+            (
+                "etc/udev/rules.d/70-persistent-net.rules",
+                "".join(
+                    [
+                        'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
+                        'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
+                    ]
+                ),
+            ),
+        ],
     },
     {
-        'in_data': {
+        "in_data": {
             "services": [{"type": "dns", "address": "172.19.0.12"}],
-            "networks": [{
-                "network_id": "public-ipv4",
-                "type": "ipv4", "netmask": "255.255.252.0",
-                "link": "tap1a81968a-79",
-                "routes": [{
-                    "netmask": "0.0.0.0",
-                    "network": "0.0.0.0",
-                    "gateway": "172.19.3.254",
-                }],
-                "ip_address": "172.19.1.34", "id": "network0"
-            }, {
-                "network_id": "private-ipv4",
-                "type": "ipv4", "netmask": "255.255.255.0",
-                "link": "tap1a81968a-79",
-                "routes": [],
-                "ip_address": "10.0.0.10", "id": "network1"
-            }],
+            "networks": [
+                {
+                    "network_id": "public-ipv4",
+                    "type": "ipv4",
+                    "netmask": "255.255.252.0",
+                    "link": "tap1a81968a-79",
+                    "routes": [
+                        {
+                            "netmask": "0.0.0.0",
+                            "network": "0.0.0.0",
+                            "gateway": "172.19.3.254",
+                        }
+                    ],
+                    "ip_address": "172.19.1.34",
+                    "id": "network0",
+                },
+                {
+                    "network_id": "private-ipv4",
+                    "type": "ipv4",
+                    "netmask": "255.255.255.0",
+                    "link": "tap1a81968a-79",
+                    "routes": [],
+                    "ip_address": "10.0.0.10",
+                    "id": "network1",
+                },
+            ],
             "links": [
                 {
                     "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-                    "mtu": None, "type": "bridge", "id":
-                    "tap1a81968a-79",
-                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+                    "mtu": None,
+                    "type": "bridge",
+                    "id": "tap1a81968a-79",
+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f",
                 },
             ],
         },
-        'in_macs': {
-            'fa:16:3e:ed:9a:59': 'eth0',
+        "in_macs": {
+            "fa:16:3e:ed:9a:59": "eth0",
         },
-        'out_sysconfig_opensuse': [
-            ('etc/sysconfig/network/ifcfg-eth0',
-             """
+        "out_sysconfig_opensuse": [
+            (
+                "etc/sysconfig/network/ifcfg-eth0",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 BOOTPROTO=static
@@ -602,26 +668,39 @@ LLADDR=fa:16:3e:ed:9a:59
 NETMASK=255.255.252.0
 NETMASK1=255.255.255.0
 STARTMODE=auto
-""".lstrip()),
-            ('etc/resolv.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/resolv.conf",
+                """
 ; Created by cloud-init on instance boot automatically, do not edit.
 ;
 nameserver 172.19.0.12
-""".lstrip()),
-            ('etc/NetworkManager/conf.d/99-cloud-init.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/NetworkManager/conf.d/99-cloud-init.conf",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 [main]
 dns = none
-""".lstrip()),
-            ('etc/udev/rules.d/85-persistent-net-cloud-init.rules',
-             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
-                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))],
-        'out_sysconfig_rhel': [
-            ('etc/sysconfig/network-scripts/ifcfg-eth0',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/udev/rules.d/85-persistent-net-cloud-init.rules",
+                "".join(
+                    [
+                        'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
+                        'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
+                    ]
+                ),
+            ),
+        ],
+        "out_sysconfig_rhel": [
+            (
+                "etc/sysconfig/network-scripts/ifcfg-eth0",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 BOOTPROTO=none
@@ -637,80 +716,106 @@ NM_CONTROLLED=no
 ONBOOT=yes
 TYPE=Ethernet
 USERCTL=no
-""".lstrip()),
-            ('etc/resolv.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/resolv.conf",
+                """
 ; Created by cloud-init on instance boot automatically, do not edit.
 ;
 nameserver 172.19.0.12
-""".lstrip()),
-            ('etc/NetworkManager/conf.d/99-cloud-init.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/NetworkManager/conf.d/99-cloud-init.conf",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 [main]
 dns = none
-""".lstrip()),
-            ('etc/udev/rules.d/70-persistent-net.rules',
-             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
-                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))]
-
+""".lstrip(),
+            ),
+            (
+                "etc/udev/rules.d/70-persistent-net.rules",
+                "".join(
+                    [
+                        'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
+                        'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
+                    ]
+                ),
+            ),
+        ],
     },
     {
-        'in_data': {
+        "in_data": {
             "services": [{"type": "dns", "address": "172.19.0.12"}],
-            "networks": [{
-                "network_id": "public-ipv4",
-                "type": "ipv4", "netmask": "255.255.252.0",
-                "link": "tap1a81968a-79",
-                "routes": [{
-                    "netmask": "0.0.0.0",
-                    "network": "0.0.0.0",
-                    "gateway": "172.19.3.254",
-                }],
-                "ip_address": "172.19.1.34", "id": "network0"
-            }, {
-                "network_id": "public-ipv6-a",
-                "type": "ipv6", "netmask": "",
-                "link": "tap1a81968a-79",
-                "routes": [
-                    {
-                        "gateway": "2001:DB8::1",
-                        "netmask": "::",
-                        "network": "::"
-                    }
-                ],
-                "ip_address": "2001:DB8::10", "id": "network1"
-            }, {
-                "network_id": "public-ipv6-b",
-                "type": "ipv6", "netmask": "64",
-                "link": "tap1a81968a-79",
-                "routes": [
-                ],
-                "ip_address": "2001:DB9::10", "id": "network2"
-            }, {
-                "network_id": "public-ipv6-c",
-                "type": "ipv6", "netmask": "64",
-                "link": "tap1a81968a-79",
-                "routes": [
-                ],
-                "ip_address": "2001:DB10::10", "id": "network3"
-            }],
+            "networks": [
+                {
+                    "network_id": "public-ipv4",
+                    "type": "ipv4",
+                    "netmask": "255.255.252.0",
+                    "link": "tap1a81968a-79",
+                    "routes": [
+                        {
+                            "netmask": "0.0.0.0",
+                            "network": "0.0.0.0",
+                            "gateway": "172.19.3.254",
+                        }
+                    ],
+                    "ip_address": "172.19.1.34",
+                    "id": "network0",
+                },
+                {
+                    "network_id": "public-ipv6-a",
+                    "type": "ipv6",
+                    "netmask": "",
+                    "link": "tap1a81968a-79",
+                    "routes": [
+                        {
+                            "gateway": "2001:DB8::1",
+                            "netmask": "::",
+                            "network": "::",
+                        }
+                    ],
+                    "ip_address": "2001:DB8::10",
+                    "id": "network1",
+                },
+                {
+                    "network_id": "public-ipv6-b",
+                    "type": "ipv6",
+                    "netmask": "64",
+                    "link": "tap1a81968a-79",
+                    "routes": [],
+                    "ip_address": "2001:DB9::10",
+                    "id": "network2",
+                },
+                {
+                    "network_id": "public-ipv6-c",
+                    "type": "ipv6",
+                    "netmask": "64",
+                    "link": "tap1a81968a-79",
+                    "routes": [],
+                    "ip_address": "2001:DB10::10",
+                    "id": "network3",
+                },
+            ],
             "links": [
                 {
                     "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-                    "mtu": None, "type": "bridge", "id":
-                    "tap1a81968a-79",
-                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+                    "mtu": None,
+                    "type": "bridge",
+                    "id": "tap1a81968a-79",
+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f",
                 },
             ],
         },
-        'in_macs': {
-            'fa:16:3e:ed:9a:59': 'eth0',
+        "in_macs": {
+            "fa:16:3e:ed:9a:59": "eth0",
         },
-        'out_sysconfig_opensuse': [
-            ('etc/sysconfig/network/ifcfg-eth0',
-             """
+        "out_sysconfig_opensuse": [
+            (
+                "etc/sysconfig/network/ifcfg-eth0",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 BOOTPROTO=static
@@ -721,26 +826,39 @@ IPADDR6_2=2001:DB10::10/64
 LLADDR=fa:16:3e:ed:9a:59
 NETMASK=255.255.252.0
 STARTMODE=auto
-""".lstrip()),
-            ('etc/resolv.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/resolv.conf",
+                """
 ; Created by cloud-init on instance boot automatically, do not edit.
 ;
 nameserver 172.19.0.12
-""".lstrip()),
-            ('etc/NetworkManager/conf.d/99-cloud-init.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/NetworkManager/conf.d/99-cloud-init.conf",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 [main]
 dns = none
-""".lstrip()),
-            ('etc/udev/rules.d/85-persistent-net-cloud-init.rules',
-             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
-                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))],
-        'out_sysconfig_rhel': [
-            ('etc/sysconfig/network-scripts/ifcfg-eth0',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/udev/rules.d/85-persistent-net-cloud-init.rules",
+                "".join(
+                    [
+                        'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
+                        'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
+                    ]
+                ),
+            ),
+        ],
+        "out_sysconfig_rhel": [
+            (
+                "etc/sysconfig/network-scripts/ifcfg-eth0",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 BOOTPROTO=none
@@ -760,24 +878,36 @@ NM_CONTROLLED=no
 ONBOOT=yes
 TYPE=Ethernet
 USERCTL=no
-""".lstrip()),
-            ('etc/resolv.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/resolv.conf",
+                """
 ; Created by cloud-init on instance boot automatically, do not edit.
 ;
 nameserver 172.19.0.12
-""".lstrip()),
-            ('etc/NetworkManager/conf.d/99-cloud-init.conf',
-             """
+""".lstrip(),
+            ),
+            (
+                "etc/NetworkManager/conf.d/99-cloud-init.conf",
+                """
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 [main]
 dns = none
-""".lstrip()),
-            ('etc/udev/rules.d/70-persistent-net.rules',
-             "".join(['SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
-                      'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n']))]
-    }
+""".lstrip(),
+            ),
+            (
+                "etc/udev/rules.d/70-persistent-net.rules",
+                "".join(
+                    [
+                        'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ',
+                        'ATTR{address}=="fa:16:3e:ed:9a:59", NAME="eth0"\n',
+                    ]
+                ),
+            ),
+        ],
+    },
 ]
 
 EXAMPLE_ENI = """
@@ -820,8 +950,9 @@ iface eth1 inet static
 """.lstrip()
 
 NETWORK_CONFIGS = {
-    'small': {
-        'expected_networkd_eth99': textwrap.dedent("""\
+    "small": {
+        "expected_networkd_eth99": textwrap.dedent(
+            """\
             [Match]
             Name=eth99
             MACAddress=c0:d6:9f:2c:e8:80
@@ -837,8 +968,10 @@ NETWORK_CONFIGS = {
             Gateway=65.61.151.37
             Destination=0.0.0.0/0
             Metric=10000
-        """).rstrip(' '),
-        'expected_networkd_eth1': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_networkd_eth1": textwrap.dedent(
+            """\
             [Match]
             Name=eth1
             MACAddress=cf:d6:af:48:e8:80
@@ -846,8 +979,10 @@ NETWORK_CONFIGS = {
             DHCP=no
             Domains=wark.maas
             DNS=1.2.3.4 5.6.7.8
-        """).rstrip(' '),
-        'expected_eni': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
                 dns-nameservers 1.2.3.4 5.6.7.8
@@ -865,8 +1000,10 @@ NETWORK_CONFIGS = {
                 dns-search barley.maas sach.maas
                 post-up route add default gw 65.61.151.37 metric 10000 || true
                 pre-down route del default gw 65.61.151.37 metric 10000 || true
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
@@ -892,29 +1029,37 @@ NETWORK_CONFIGS = {
                             to: 0.0.0.0/0
                             via: 65.61.151.37
                         set-name: eth99
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-eth1': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 LLADDR=cf:d6:af:48:e8:80
-                STARTMODE=auto"""),
-            'ifcfg-eth99': textwrap.dedent("""\
+                STARTMODE=auto"""
+            ),
+            "ifcfg-eth99": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp4
                 LLADDR=c0:d6:9f:2c:e8:80
                 IPADDR=192.168.21.3
                 NETMASK=255.255.255.0
-                STARTMODE=auto"""),
+                STARTMODE=auto"""
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-eth1': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth1
                 HWADDR=cf:d6:af:48:e8:80
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-eth99': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-eth99": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEFROUTE=yes
                 DEVICE=eth99
@@ -930,9 +1075,11 @@ NETWORK_CONFIGS = {
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
+                USERCTL=no"""
+            ),
         },
-        'yaml': textwrap.dedent("""
+        "yaml": textwrap.dedent(
+            """
             version: 1
             config:
                 # Physical interfaces.
@@ -961,16 +1108,20 @@ NETWORK_CONFIGS = {
                     - 5.6.7.8
                   search:
                     - wark.maas
-        """),
+        """
+        ),
     },
-    'v4_and_v6': {
-        'expected_networkd': textwrap.dedent("""\
+    "v4_and_v6": {
+        "expected_networkd": textwrap.dedent(
+            """\
             [Match]
             Name=iface0
             [Network]
             DHCP=yes
-        """).rstrip(' '),
-        'expected_eni': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
@@ -979,22 +1130,28 @@ NETWORK_CONFIGS = {
 
             # control-alias iface0
             iface iface0 inet6 dhcp
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
                     iface0:
                         dhcp4: true
                         dhcp6: true
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DHCLIENT6_MODE=managed
-                STARTMODE=auto""")
+                STARTMODE=auto"""
+            )
         },
-        'yaml': textwrap.dedent("""\
+        "yaml": textwrap.dedent(
+            """\
             version: 1
             config:
               - type: 'physical'
@@ -1002,10 +1159,12 @@ NETWORK_CONFIGS = {
                 subnets:
                 - {'type': 'dhcp4'}
                 - {'type': 'dhcp6'}
-        """).rstrip(' '),
+        """
+        ).rstrip(" "),
     },
-    'v4_and_v6_static': {
-        'expected_networkd': textwrap.dedent("""\
+    "v4_and_v6_static": {
+        "expected_networkd": textwrap.dedent(
+            """\
             [Match]
             Name=iface0
             [Link]
@@ -1015,8 +1174,10 @@ NETWORK_CONFIGS = {
             [Address]
             Address=192.168.14.2/24
             Address=2001:1::1/64
-        """).rstrip(' '),
-        'expected_eni': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
@@ -1029,8 +1190,10 @@ NETWORK_CONFIGS = {
             iface iface0 inet6 static
                 address 2001:1::1/64
                 mtu 1500
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
@@ -1040,8 +1203,10 @@ NETWORK_CONFIGS = {
                         - 2001:1::1/64
                         ipv6-mtu: 1500
                         mtu: 9000
-        """).rstrip(' '),
-        'yaml': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "yaml": textwrap.dedent(
+            """\
             version: 1
             config:
               - type: 'physical'
@@ -1054,19 +1219,23 @@ NETWORK_CONFIGS = {
                   - type: static
                     address: 2001:1::1/64
                     mtu: 1500
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 IPADDR=192.168.14.2
                 IPADDR6=2001:1::1/64
                 NETMASK=255.255.255.0
                 STARTMODE=auto
                 MTU=9000
-                """),
+                """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=iface0
                 IPADDR=192.168.14.2
@@ -1081,17 +1250,21 @@ NETWORK_CONFIGS = {
                 USERCTL=no
                 MTU=9000
                 IPV6_MTU=1500
-                """),
+                """
+            ),
         },
     },
-    'v6_and_v4': {
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+    "v6_and_v4": {
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DHCLIENT6_MODE=managed
-                STARTMODE=auto""")
+                STARTMODE=auto"""
+            )
         },
-        'yaml': textwrap.dedent("""\
+        "yaml": textwrap.dedent(
+            """\
             version: 1
             config:
               - type: 'physical'
@@ -1099,46 +1272,58 @@ NETWORK_CONFIGS = {
                 subnets:
                   - type: dhcp6
                   - type: dhcp4
-        """).rstrip(' '),
+        """
+        ).rstrip(" "),
     },
-    'dhcpv6_only': {
-        'expected_networkd': textwrap.dedent("""\
+    "dhcpv6_only": {
+        "expected_networkd": textwrap.dedent(
+            """\
             [Match]
             Name=iface0
             [Network]
             DHCP=ipv6
-        """).rstrip(' '),
-        'expected_eni': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
             auto iface0
             iface iface0 inet6 dhcp
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
                     iface0:
                         dhcp6: true
-        """).rstrip(' '),
-        'yaml': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "yaml": textwrap.dedent(
+            """\
             version: 1
             config:
               - type: 'physical'
                 name: 'iface0'
                 subnets:
                 - {'type': 'dhcp6'}
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp6
                 DHCLIENT6_MODE=managed
                 STARTMODE=auto
-                """),
+                """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=iface0
                 DHCPV6C=yes
@@ -1148,27 +1333,33 @@ NETWORK_CONFIGS = {
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
+                """
+            ),
         },
     },
-    'dhcpv6_accept_ra': {
-        'expected_eni': textwrap.dedent("""\
+    "dhcpv6_accept_ra": {
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
             auto iface0
             iface iface0 inet6 dhcp
                 accept_ra 1
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
                     iface0:
                         accept-ra: true
                         dhcp6: true
-        """).rstrip(' '),
-        'yaml_v1': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "yaml_v1": textwrap.dedent(
+            """\
             version: 1
             config:
               - type: 'physical'
@@ -1176,23 +1367,29 @@ NETWORK_CONFIGS = {
                 subnets:
                 - {'type': 'dhcp6'}
                 accept-ra: true
-        """).rstrip(' '),
-        'yaml_v2': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "yaml_v2": textwrap.dedent(
+            """\
             version: 2
             ethernets:
                 iface0:
                     dhcp6: true
                     accept-ra: true
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp6
                 DHCLIENT6_MODE=managed
                 STARTMODE=auto
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=iface0
                 DHCPV6C=yes
@@ -1203,34 +1400,42 @@ NETWORK_CONFIGS = {
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-            """),
+            """
+            ),
         },
-        'expected_networkd': textwrap.dedent("""\
+        "expected_networkd": textwrap.dedent(
+            """\
                 [Match]
                 Name=iface0
                 [Network]
                 DHCP=ipv6
                 IPv6AcceptRA=True
-            """).rstrip(' '),
+            """
+        ).rstrip(" "),
     },
-    'dhcpv6_reject_ra': {
-        'expected_eni': textwrap.dedent("""\
+    "dhcpv6_reject_ra": {
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
             auto iface0
             iface iface0 inet6 dhcp
                 accept_ra 0
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
                     iface0:
                         accept-ra: false
                         dhcp6: true
-        """).rstrip(' '),
-        'yaml_v1': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "yaml_v1": textwrap.dedent(
+            """\
             version: 1
             config:
             - type: 'physical'
@@ -1238,23 +1443,29 @@ NETWORK_CONFIGS = {
               subnets:
               - {'type': 'dhcp6'}
               accept-ra: false
-        """).rstrip(' '),
-        'yaml_v2': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "yaml_v2": textwrap.dedent(
+            """\
             version: 2
             ethernets:
                 iface0:
                     dhcp6: true
                     accept-ra: false
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp6
                 DHCLIENT6_MODE=managed
                 STARTMODE=auto
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=iface0
                 DHCPV6C=yes
@@ -1265,49 +1476,61 @@ NETWORK_CONFIGS = {
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-            """),
+            """
+            ),
         },
-        'expected_networkd': textwrap.dedent("""\
+        "expected_networkd": textwrap.dedent(
+            """\
                 [Match]
                 Name=iface0
                 [Network]
                 DHCP=ipv6
                 IPv6AcceptRA=False
-            """).rstrip(' '),
+            """
+        ).rstrip(" "),
     },
-    'ipv6_slaac': {
-        'expected_eni': textwrap.dedent("""\
+    "ipv6_slaac": {
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
             auto iface0
             iface iface0 inet6 auto
                 dhcp 0
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
                     iface0:
                         dhcp6: true
-        """).rstrip(' '),
-        'yaml': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "yaml": textwrap.dedent(
+            """\
             version: 1
             config:
             - type: 'physical'
               name: 'iface0'
               subnets:
               - {'type': 'ipv6_slaac'}
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp6
                 DHCLIENT6_MODE=info
                 STARTMODE=auto
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=iface0
                 IPV6_AUTOCONF=yes
@@ -1317,11 +1540,13 @@ NETWORK_CONFIGS = {
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-            """),
+            """
+            ),
         },
     },
-    'static6': {
-        'yaml': textwrap.dedent("""\
+    "static6": {
+        "yaml": textwrap.dedent(
+            """\
         version: 1
         config:
           - type: 'physical'
@@ -1330,9 +1555,11 @@ NETWORK_CONFIGS = {
             subnets:
             - type: 'static6'
               address: 2001:1::1/64
-    """).rstrip(' '),
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+    """
+        ).rstrip(" "),
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
             BOOTPROTO=none
             DEVICE=iface0
             IPV6ADDR=2001:1::1/64
@@ -1344,42 +1571,52 @@ NETWORK_CONFIGS = {
             ONBOOT=yes
             TYPE=Ethernet
             USERCTL=no
-            """),
+            """
+            ),
         },
     },
-    'dhcpv6_stateless': {
-        'expected_eni': textwrap.dedent("""\
+    "dhcpv6_stateless": {
+        "expected_eni": textwrap.dedent(
+            """\
         auto lo
         iface lo inet loopback
 
         auto iface0
         iface iface0 inet6 auto
             dhcp 1
-    """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+    """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
         network:
             version: 2
             ethernets:
                 iface0:
                     dhcp6: true
-    """).rstrip(' '),
-        'yaml': textwrap.dedent("""\
+    """
+        ).rstrip(" "),
+        "yaml": textwrap.dedent(
+            """\
         version: 1
         config:
           - type: 'physical'
             name: 'iface0'
             subnets:
             - {'type': 'ipv6_dhcpv6-stateless'}
-    """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+    """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
             BOOTPROTO=dhcp6
             DHCLIENT6_MODE=info
             STARTMODE=auto
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
             BOOTPROTO=none
             DEVICE=iface0
             DHCPV6C=yes
@@ -1391,26 +1628,32 @@ NETWORK_CONFIGS = {
             ONBOOT=yes
             TYPE=Ethernet
             USERCTL=no
-            """),
+            """
+            ),
         },
     },
-    'dhcpv6_stateful': {
-        'expected_eni': textwrap.dedent("""\
+    "dhcpv6_stateful": {
+        "expected_eni": textwrap.dedent(
+            """\
         auto lo
         iface lo inet loopback
 
         auto iface0
         iface iface0 inet6 dhcp
-    """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+    """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
         network:
             version: 2
             ethernets:
                 iface0:
                     accept-ra: true
                     dhcp6: true
-    """).rstrip(' '),
-        'yaml': textwrap.dedent("""\
+    """
+        ).rstrip(" "),
+        "yaml": textwrap.dedent(
+            """\
         version: 1
         config:
           - type: 'physical'
@@ -1418,16 +1661,20 @@ NETWORK_CONFIGS = {
             subnets:
             - {'type': 'ipv6_dhcpv6-stateful'}
             accept-ra: true
-    """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+    """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
             BOOTPROTO=dhcp6
             DHCLIENT6_MODE=managed
             STARTMODE=auto
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
             BOOTPROTO=dhcp
             DEVICE=iface0
             DHCPV6C=yes
@@ -1439,75 +1686,93 @@ NETWORK_CONFIGS = {
             ONBOOT=yes
             TYPE=Ethernet
             USERCTL=no
-            """),
+            """
+            ),
         },
     },
-    'wakeonlan_disabled': {
-        'expected_eni': textwrap.dedent("""\
+    "wakeonlan_disabled": {
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
             auto iface0
             iface iface0 inet dhcp
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 ethernets:
                     iface0:
                         dhcp4: true
                         wakeonlan: false
                 version: 2
-        """),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp4
                 STARTMODE=auto
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEVICE=iface0
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-            """),
+            """
+            ),
         },
-        'yaml_v2': textwrap.dedent("""\
+        "yaml_v2": textwrap.dedent(
+            """\
             version: 2
             ethernets:
                 iface0:
                     dhcp4: true
                     wakeonlan: false
-        """).rstrip(' '),
+        """
+        ).rstrip(" "),
     },
-    'wakeonlan_enabled': {
-        'expected_eni': textwrap.dedent("""\
+    "wakeonlan_enabled": {
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
             auto iface0
             iface iface0 inet dhcp
                 ethernet-wol g
-        """).rstrip(' '),
-        'expected_netplan': textwrap.dedent("""
+        """
+        ).rstrip(" "),
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 ethernets:
                     iface0:
                         dhcp4: true
                         wakeonlan: true
                 version: 2
-        """),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        """
+        ),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp4
                 ETHTOOL_OPTS="wol g"
                 STARTMODE=auto
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-iface0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-iface0": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEVICE=iface0
                 ETHTOOL_OPTS="wol g"
@@ -1515,18 +1780,21 @@ NETWORK_CONFIGS = {
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-            """),
+            """
+            ),
         },
-        'yaml_v2': textwrap.dedent("""\
+        "yaml_v2": textwrap.dedent(
+            """\
             version: 2
             ethernets:
                 iface0:
                     dhcp4: true
                     wakeonlan: true
-        """).rstrip(' '),
+        """
+        ).rstrip(" "),
     },
-    'all': {
-        'expected_eni': ("""\
+    "all": {
+        "expected_eni": """\
 auto lo
 iface lo inet loopback
     dns-nameservers 8.8.8.8 4.4.4.4 8.8.4.4
@@ -1616,8 +1884,9 @@ iface eth0.101 inet static
 
 post-up route add -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
 pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
-"""),
-        'expected_netplan': textwrap.dedent("""
+""",
+        "expected_netplan": textwrap.dedent(
+            """
             network:
                 version: 2
                 ethernets:
@@ -1713,25 +1982,31 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                             - barley.maas
                             - sacchromyces.maas
                             - brettanomyces.maas
-        """).rstrip(' '),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-bond0': textwrap.dedent("""\
+        """
+        ).rstrip(" "),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-bond0": textwrap.dedent(
+                """\
                 BONDING_MASTER=yes
                 BONDING_MODULE_OPTS="mode=active-backup """
-                                           """xmit_hash_policy=layer3+4 """
-                                           """miimon=100"
+                """xmit_hash_policy=layer3+4 """
+                """miimon=100"
                 BONDING_SLAVE_0=eth1
                 BONDING_SLAVE_1=eth2
                 BOOTPROTO=dhcp6
                 DHCLIENT6_MODE=managed
                 LLADDR=aa:bb:cc:dd:ee:ff
-                STARTMODE=auto"""),
-            'ifcfg-bond0.200': textwrap.dedent("""\
+                STARTMODE=auto"""
+            ),
+            "ifcfg-bond0.200": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp4
                 ETHERDEVICE=bond0
                 STARTMODE=auto
-                VLAN_ID=200"""),
-            'ifcfg-br0': textwrap.dedent("""\
+                VLAN_ID=200"""
+            ),
+            "ifcfg-br0": textwrap.dedent(
+                """\
                 BRIDGE_AGEINGTIME=250
                 BOOTPROTO=static
                 IPADDR=192.168.14.2
@@ -1741,12 +2016,16 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 BRIDGE_PRIORITY=22
                 BRIDGE_PORTS='eth3 eth4'
                 STARTMODE=auto
-                BRIDGE_STP=off"""),
-            'ifcfg-eth0': textwrap.dedent("""\
+                BRIDGE_STP=off"""
+            ),
+            "ifcfg-eth0": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 LLADDR=c0:d6:9f:2c:e8:80
-                STARTMODE=auto"""),
-            'ifcfg-eth0.101': textwrap.dedent("""\
+                STARTMODE=auto"""
+            ),
+            "ifcfg-eth0.101": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 IPADDR=192.168.0.2
                 IPADDR1=192.168.2.10
@@ -1755,44 +2034,58 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 NETMASK1=255.255.255.0
                 ETHERDEVICE=eth0
                 STARTMODE=auto
-                VLAN_ID=101"""),
-            'ifcfg-eth1': textwrap.dedent("""\
+                VLAN_ID=101"""
+            ),
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 LLADDR=aa:d6:9f:2c:e8:80
-                STARTMODE=hotplug"""),
-            'ifcfg-eth2': textwrap.dedent("""\
+                STARTMODE=hotplug"""
+            ),
+            "ifcfg-eth2": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 LLADDR=c0:bb:9f:2c:e8:80
-                STARTMODE=hotplug"""),
-            'ifcfg-eth3': textwrap.dedent("""\
+                STARTMODE=hotplug"""
+            ),
+            "ifcfg-eth3": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 BRIDGE=yes
                 LLADDR=66:bb:9f:2c:e8:80
-                STARTMODE=auto"""),
-            'ifcfg-eth4': textwrap.dedent("""\
+                STARTMODE=auto"""
+            ),
+            "ifcfg-eth4": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 BRIDGE=yes
                 LLADDR=98:bb:9f:2c:e8:80
-                STARTMODE=auto"""),
-            'ifcfg-eth5': textwrap.dedent("""\
+                STARTMODE=auto"""
+            ),
+            "ifcfg-eth5": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 LLADDR=98:bb:9f:2c:e8:8a
-                STARTMODE=manual"""),
-            'ifcfg-ib0': textwrap.dedent("""\
+                STARTMODE=manual"""
+            ),
+            "ifcfg-ib0": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 LLADDR=a0:00:02:20:fe:80:00:00:00:00:00:00:ec:0d:9a:03:00:15:e2:c1
                 IPADDR=192.168.200.7
                 MTU=9000
                 NETMASK=255.255.255.0
                 STARTMODE=auto
-                TYPE=InfiniBand"""),
+                TYPE=InfiniBand"""
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-bond0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-bond0": textwrap.dedent(
+                """\
                 BONDING_MASTER=yes
                 BONDING_OPTS="mode=active-backup """
-                                           """xmit_hash_policy=layer3+4 """
-                                           """miimon=100"
+                """xmit_hash_policy=layer3+4 """
+                """miimon=100"
                 BONDING_SLAVE0=eth1
                 BONDING_SLAVE1=eth2
                 BOOTPROTO=none
@@ -1803,8 +2096,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Bond
-                USERCTL=no"""),
-            'ifcfg-bond0.200': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-bond0.200": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEVICE=bond0.200
                 DHCLIENT_SET_DEFAULT_ROUTE=no
@@ -1812,8 +2107,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 ONBOOT=yes
                 PHYSDEV=bond0
                 USERCTL=no
-                VLAN=yes"""),
-            'ifcfg-br0': textwrap.dedent("""\
+                VLAN=yes"""
+            ),
+            "ifcfg-br0": textwrap.dedent(
+                """\
                 AGEING=250
                 BOOTPROTO=none
                 DEFROUTE=yes
@@ -1831,16 +2128,20 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 PRIO=22
                 STP=no
                 TYPE=Bridge
-                USERCTL=no"""),
-            'ifcfg-eth0': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-eth0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth0
                 HWADDR=c0:d6:9f:2c:e8:80
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-eth0.101': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-eth0.101": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEFROUTE=yes
                 DEVICE=eth0.101
@@ -1857,8 +2158,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 ONBOOT=yes
                 PHYSDEV=eth0
                 USERCTL=no
-                VLAN=yes"""),
-            'ifcfg-eth1': textwrap.dedent("""\
+                VLAN=yes"""
+            ),
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth1
                 HWADDR=aa:d6:9f:2c:e8:80
@@ -1867,8 +2170,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 ONBOOT=yes
                 SLAVE=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-eth2': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-eth2": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth2
                 HWADDR=c0:bb:9f:2c:e8:80
@@ -1877,8 +2182,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 ONBOOT=yes
                 SLAVE=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-eth3': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-eth3": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 BRIDGE=br0
                 DEVICE=eth3
@@ -1886,8 +2193,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-eth4': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-eth4": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 BRIDGE=br0
                 DEVICE=eth4
@@ -1895,8 +2204,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-eth5': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-eth5": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEVICE=eth5
                 DHCLIENT_SET_DEFAULT_ROUTE=no
@@ -1904,8 +2215,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 NM_CONTROLLED=no
                 ONBOOT=no
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-ib0': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-ib0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=ib0
                 HWADDR=a0:00:02:20:fe:80:00:00:00:00:00:00:ec:0d:9a:03:00:15:e2:c1
@@ -1915,9 +2228,11 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=InfiniBand
-                USERCTL=no"""),
+                USERCTL=no"""
+            ),
         },
-        'yaml': textwrap.dedent("""
+        "yaml": textwrap.dedent(
+            """
             version: 1
             config:
                 # Physical interfaces.
@@ -2060,10 +2375,12 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                   destination: 10.0.0.0/8
                   gateway: 11.0.0.1
                   metric: 3
-        """).lstrip(),
+        """
+        ).lstrip(),
     },
-    'bond': {
-        'yaml': textwrap.dedent("""
+    "bond": {
+        "yaml": textwrap.dedent(
+            """
             version: 1
             config:
               - type: physical
@@ -2109,8 +2426,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                           network: 3001:67c:1
                           netmask: ffff:ffff:0
                           metric: 10000
-            """),
-        'expected_netplan': textwrap.dedent("""
+            """
+        ),
+        "expected_netplan": textwrap.dedent(
+            """
          network:
              version: 2
              ethernets:
@@ -2152,8 +2471,10 @@ pre-down route del -net 10.0.0.0/8 gw 11.0.0.1 metric 3 || true
                      -   metric: 10000
                          to: 3001:67c:1/32
                          via: 3001:67c:1562:1
-        """),
-        'expected_eni': textwrap.dedent("""\
+        """
+        ),
+        "expected_eni": textwrap.dedent(
+            """\
 auto lo
 iface lo inet loopback
 
@@ -2215,8 +2536,10 @@ iface bond0 inet6 static
 || true
     pre-down route del -A inet6 3001:67c:1/32 gw 3001:67c:1562:1 metric 10000 \
 || true
-        """),
-        'yaml-v2': textwrap.dedent("""
+        """
+        ),
+        "yaml-v2": textwrap.dedent(
+            """
             version: 2
             ethernets:
               eth0:
@@ -2256,8 +2579,10 @@ iface bond0 inet6 static
                 -   metric: 10000
                     to: 3001:67c:1562:8007::1/64
                     via: 3001:67c:1562:8007::aac:40b2
-            """),
-        'expected_netplan-v2': textwrap.dedent("""
+            """
+        ),
+        "expected_netplan-v2": textwrap.dedent(
+            """
          network:
              bonds:
                  bond0:
@@ -2298,17 +2623,18 @@ iface bond0 inet6 static
                          macaddress: aa:bb:cc:dd:e8:01
                      set-name: vf0
              version: 2
-        """),
-
-        'expected_sysconfig_opensuse': {
-            'ifcfg-bond0': textwrap.dedent("""\
+        """
+        ),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-bond0": textwrap.dedent(
+                """\
         BONDING_MASTER=yes
         BONDING_MODULE_OPTS="mode=active-backup xmit_hash_policy=layer3+4 """
-                                           """miimon=100 num_grat_arp=5 """
-                                           """downdelay=10 updelay=20 """
-                                           """fail_over_mac=active """
-                                           """primary=bond0s0 """
-                                           """primary_reselect=always"
+                """miimon=100 num_grat_arp=5 """
+                """downdelay=10 updelay=20 """
+                """fail_over_mac=active """
+                """primary=bond0s0 """
+                """primary_reselect=always"
         BONDING_SLAVE_0=bond0s0
         BONDING_SLAVE_1=bond0s1
         BOOTPROTO=static
@@ -2320,27 +2646,33 @@ iface bond0 inet6 static
         NETMASK=255.255.255.0
         NETMASK1=255.255.255.0
         STARTMODE=auto
-        """),
-            'ifcfg-bond0s0': textwrap.dedent("""\
+        """
+            ),
+            "ifcfg-bond0s0": textwrap.dedent(
+                """\
         BOOTPROTO=none
         LLADDR=aa:bb:cc:dd:e8:00
         STARTMODE=hotplug
-        """),
-            'ifcfg-bond0s1': textwrap.dedent("""\
+        """
+            ),
+            "ifcfg-bond0s1": textwrap.dedent(
+                """\
         BOOTPROTO=none
         LLADDR=aa:bb:cc:dd:e8:01
         STARTMODE=hotplug
-        """),
+        """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-bond0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-bond0": textwrap.dedent(
+                """\
         BONDING_MASTER=yes
         BONDING_OPTS="mode=active-backup xmit_hash_policy=layer3+4 """
-                                           """miimon=100 num_grat_arp=5 """
-                                           """downdelay=10 updelay=20 """
-                                           """fail_over_mac=active """
-                                           """primary=bond0s0 """
-                                           """primary_reselect=always"
+                """miimon=100 num_grat_arp=5 """
+                """downdelay=10 updelay=20 """
+                """fail_over_mac=active """
+                """primary=bond0s0 """
+                """primary_reselect=always"
         BONDING_SLAVE0=bond0s0
         BONDING_SLAVE1=bond0s1
         BOOTPROTO=none
@@ -2361,8 +2693,10 @@ iface bond0 inet6 static
         ONBOOT=yes
         TYPE=Bond
         USERCTL=no
-        """),
-            'ifcfg-bond0s0': textwrap.dedent("""\
+        """
+            ),
+            "ifcfg-bond0s0": textwrap.dedent(
+                """\
         BOOTPROTO=none
         DEVICE=bond0s0
         HWADDR=aa:bb:cc:dd:e8:00
@@ -2372,19 +2706,25 @@ iface bond0 inet6 static
         SLAVE=yes
         TYPE=Ethernet
         USERCTL=no
-        """),
-            'route6-bond0': textwrap.dedent("""\
+        """
+            ),
+            "route6-bond0": textwrap.dedent(
+                """\
         # Created by cloud-init on instance boot automatically, do not edit.
         #
         2001:67c:1/ffff:ffff:0 via 2001:67c:1562:1  dev bond0
         3001:67c:1/ffff:ffff:0 via 3001:67c:1562:1 metric 10000 dev bond0
-            """),
-            'route-bond0': textwrap.dedent("""\
+            """
+            ),
+            "route-bond0": textwrap.dedent(
+                """\
         ADDRESS0=10.1.3.0
         GATEWAY0=192.168.0.3
         NETMASK0=255.255.255.0
-        """),
-            'ifcfg-bond0s1': textwrap.dedent("""\
+        """
+            ),
+            "ifcfg-bond0s1": textwrap.dedent(
+                """\
         BOOTPROTO=none
         DEVICE=bond0s1
         HWADDR=aa:bb:cc:dd:e8:01
@@ -2394,11 +2734,13 @@ iface bond0 inet6 static
         SLAVE=yes
         TYPE=Ethernet
         USERCTL=no
-        """),
+        """
+            ),
         },
     },
-    'vlan': {
-        'yaml': textwrap.dedent("""
+    "vlan": {
+        "yaml": textwrap.dedent(
+            """
             version: 1
             config:
               - type: physical
@@ -2421,14 +2763,18 @@ iface bond0 inet6 static
                      - gateway: 2001:1::1
                        netmask: '::'
                        network: '::'
-            """),
-        'expected_sysconfig_opensuse': {
+            """
+        ),
+        "expected_sysconfig_opensuse": {
             # TODO RJS: unknown proper BOOTPROTO setting ask Marius
-            'ifcfg-en0': textwrap.dedent("""\
+            "ifcfg-en0": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 LLADDR=aa:bb:cc:dd:e8:00
-                STARTMODE=auto"""),
-            'ifcfg-en0.99': textwrap.dedent("""\
+                STARTMODE=auto"""
+            ),
+            "ifcfg-en0.99": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 IPADDR=192.168.2.2
                 IPADDR1=192.168.1.2
@@ -2439,18 +2785,22 @@ iface bond0 inet6 static
                 STARTMODE=auto
                 ETHERDEVICE=en0
                 VLAN_ID=99
-            """),
+            """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-en0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-en0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=en0
                 HWADDR=aa:bb:cc:dd:e8:00
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
-                USERCTL=no"""),
-            'ifcfg-en0.99': textwrap.dedent("""\
+                USERCTL=no"""
+            ),
+            "ifcfg-en0.99": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEFROUTE=yes
                 DEVICE=en0.99
@@ -2469,11 +2819,13 @@ iface bond0 inet6 static
                 ONBOOT=yes
                 PHYSDEV=en0
                 USERCTL=no
-                VLAN=yes"""),
+                VLAN=yes"""
+            ),
         },
     },
-    'bridge': {
-        'yaml': textwrap.dedent("""
+    "bridge": {
+        "yaml": textwrap.dedent(
+            """
             version: 1
             config:
               - type: physical
@@ -2498,9 +2850,11 @@ iface bond0 inet6 static
                   bridge_bridgeprio: 22
                 subnets:
                   - type: static
-                    address: 192.168.2.2/24"""),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-br0': textwrap.dedent("""\
+                    address: 192.168.2.2/24"""
+        ),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-br0": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 IPADDR=192.168.2.2
                 NETMASK=255.255.255.0
@@ -2508,24 +2862,30 @@ iface bond0 inet6 static
                 BRIDGE_STP=off
                 BRIDGE_PRIORITY=22
                 BRIDGE_PORTS='eth0 eth1'
-                """),
-            'ifcfg-eth0': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth0": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 BRIDGE=yes
                 LLADDR=52:54:00:12:34:00
                 IPADDR6=2001:1::100/96
                 STARTMODE=auto
-                """),
-            'ifcfg-eth1': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 BRIDGE=yes
                 LLADDR=52:54:00:12:34:01
                 IPADDR6=2001:1::101/96
                 STARTMODE=auto
-                """),
+                """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-br0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-br0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=br0
                 IPADDR=192.168.2.2
@@ -2536,8 +2896,10 @@ iface bond0 inet6 static
                 STP=no
                 TYPE=Bridge
                 USERCTL=no
-                """),
-            'ifcfg-eth0': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 BRIDGE=br0
                 DEVICE=eth0
@@ -2550,8 +2912,10 @@ iface bond0 inet6 static
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            'ifcfg-eth1': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 BRIDGE=br0
                 DEVICE=eth1
@@ -2564,11 +2928,13 @@ iface bond0 inet6 static
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
+                """
+            ),
         },
     },
-    'manual': {
-        'yaml': textwrap.dedent("""
+    "manual": {
+        "yaml": textwrap.dedent(
+            """
             version: 1
             config:
               - type: physical
@@ -2590,8 +2956,10 @@ iface bond0 inet6 static
                 subnets:
                   - type: manual
                     control: manual
-                  """),
-        'expected_eni': textwrap.dedent("""\
+                  """
+        ),
+        "expected_eni": textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
@@ -2605,8 +2973,10 @@ iface bond0 inet6 static
 
             # control-manual eth2
             iface eth2 inet manual
-            """),
-        'expected_netplan': textwrap.dedent("""\
+            """
+        ),
+        "expected_netplan": textwrap.dedent(
+            """\
 
             network:
                 version: 2
@@ -2626,29 +2996,37 @@ iface bond0 inet6 static
                         match:
                             macaddress: 52:54:00:12:34:ff
                         set-name: eth2
-            """),
-        'expected_sysconfig_opensuse': {
-            'ifcfg-eth0': textwrap.dedent("""\
+            """
+        ),
+        "expected_sysconfig_opensuse": {
+            "ifcfg-eth0": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 LLADDR=52:54:00:12:34:00
                 IPADDR=192.168.1.2
                 NETMASK=255.255.255.0
                 STARTMODE=manual
-                """),
-            'ifcfg-eth1': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 LLADDR=52:54:00:12:34:aa
                 MTU=1480
                 STARTMODE=auto
-                """),
-            'ifcfg-eth2': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth2": textwrap.dedent(
+                """\
                 BOOTPROTO=static
                 LLADDR=52:54:00:12:34:ff
                 STARTMODE=manual
-                """),
+                """
+            ),
         },
-        'expected_sysconfig_rhel': {
-            'ifcfg-eth0': textwrap.dedent("""\
+        "expected_sysconfig_rhel": {
+            "ifcfg-eth0": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth0
                 HWADDR=52:54:00:12:34:00
@@ -2658,8 +3036,10 @@ iface bond0 inet6 static
                 ONBOOT=no
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            'ifcfg-eth1': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth1": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth1
                 HWADDR=52:54:00:12:34:aa
@@ -2668,8 +3048,10 @@ iface bond0 inet6 static
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            'ifcfg-eth2': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eth2": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eth2
                 HWADDR=52:54:00:12:34:ff
@@ -2677,51 +3059,85 @@ iface bond0 inet6 static
                 ONBOOT=no
                 TYPE=Ethernet
                 USERCTL=no
-                """),
+                """
+            ),
         },
     },
 }
 
 
 CONFIG_V1_EXPLICIT_LOOPBACK = {
-    'version': 1,
-    'config': [{'name': 'eth0', 'type': 'physical',
-               'subnets': [{'control': 'auto', 'type': 'dhcp'}]},
-               {'name': 'lo', 'type': 'loopback',
-                'subnets': [{'control': 'auto', 'type': 'loopback'}]},
-               ]}
+    "version": 1,
+    "config": [
+        {
+            "name": "eth0",
+            "type": "physical",
+            "subnets": [{"control": "auto", "type": "dhcp"}],
+        },
+        {
+            "name": "lo",
+            "type": "loopback",
+            "subnets": [{"control": "auto", "type": "loopback"}],
+        },
+    ],
+}
 
 
 CONFIG_V1_SIMPLE_SUBNET = {
-    'version': 1,
-    'config': [{'mac_address': '52:54:00:12:34:00',
-                'name': 'interface0',
-                'subnets': [{'address': '10.0.2.15',
-                             'gateway': '10.0.2.2',
-                             'netmask': '255.255.255.0',
-                             'type': 'static'}],
-                'type': 'physical'}]}
+    "version": 1,
+    "config": [
+        {
+            "mac_address": "52:54:00:12:34:00",
+            "name": "interface0",
+            "subnets": [
+                {
+                    "address": "10.0.2.15",
+                    "gateway": "10.0.2.2",
+                    "netmask": "255.255.255.0",
+                    "type": "static",
+                }
+            ],
+            "type": "physical",
+        }
+    ],
+}
 
 CONFIG_V1_MULTI_IFACE = {
-    'version': 1,
-    'config': [{'type': 'physical',
-                'mtu': 1500,
-                'subnets': [{'type': 'static',
-                             'netmask': '255.255.240.0',
-                             'routes': [{'netmask': '0.0.0.0',
-                                         'network': '0.0.0.0',
-                                         'gateway': '51.68.80.1'}],
-                             'address': '51.68.89.122',
-                             'ipv4': True}],
-                'mac_address': 'fa:16:3e:25:b4:59',
-                'name': 'eth0'},
-               {'type': 'physical',
-                'mtu': 9000,
-                'subnets': [{'type': 'dhcp4'}],
-                'mac_address': 'fa:16:3e:b1:ca:29', 'name': 'eth1'}]}
+    "version": 1,
+    "config": [
+        {
+            "type": "physical",
+            "mtu": 1500,
+            "subnets": [
+                {
+                    "type": "static",
+                    "netmask": "255.255.240.0",
+                    "routes": [
+                        {
+                            "netmask": "0.0.0.0",
+                            "network": "0.0.0.0",
+                            "gateway": "51.68.80.1",
+                        }
+                    ],
+                    "address": "51.68.89.122",
+                    "ipv4": True,
+                }
+            ],
+            "mac_address": "fa:16:3e:25:b4:59",
+            "name": "eth0",
+        },
+        {
+            "type": "physical",
+            "mtu": 9000,
+            "subnets": [{"type": "dhcp4"}],
+            "mac_address": "fa:16:3e:b1:ca:29",
+            "name": "eth1",
+        },
+    ],
+}
 
 DEFAULT_DEV_ATTRS = {
-    'eth1000': {
+    "eth1000": {
         "bridge": False,
         "carrier": False,
         "dormant": False,
@@ -2734,16 +3150,26 @@ DEFAULT_DEV_ATTRS = {
 }
 
 
-def _setup_test(tmp_dir, mock_get_devicelist, mock_read_sys_net,
-                mock_sys_dev_path, dev_attrs=None):
+def _setup_test(
+    tmp_dir,
+    mock_get_devicelist,
+    mock_read_sys_net,
+    mock_sys_dev_path,
+    dev_attrs=None,
+):
     if not dev_attrs:
         dev_attrs = DEFAULT_DEV_ATTRS
 
     mock_get_devicelist.return_value = dev_attrs.keys()
 
-    def fake_read(devname, path, translate=None,
-                  on_enoent=None, on_keyerror=None,
-                  on_einval=None):
+    def fake_read(
+        devname,
+        path,
+        translate=None,
+        on_enoent=None,
+        on_keyerror=None,
+        on_einval=None,
+    ):
         return dev_attrs[devname][path]
 
     mock_read_sys_net.side_effect = fake_read
@@ -2753,99 +3179,137 @@ def _setup_test(tmp_dir, mock_get_devicelist, mock_read_sys_net,
 
     for dev in dev_attrs:
         os.makedirs(os.path.join(tmp_dir, dev))
-        with open(os.path.join(tmp_dir, dev, 'operstate'), 'w') as fh:
-            fh.write(dev_attrs[dev]['operstate'])
+        with open(os.path.join(tmp_dir, dev, "operstate"), "w") as fh:
+            fh.write(dev_attrs[dev]["operstate"])
         os.makedirs(os.path.join(tmp_dir, dev, "device"))
-        for key in ['device/driver']:
+        for key in ["device/driver"]:
             if key in dev_attrs[dev] and dev_attrs[dev][key]:
                 target = dev_attrs[dev][key]
                 link = os.path.join(tmp_dir, dev, key)
-                print('symlink %s -> %s' % (link, target))
+                print("symlink %s -> %s" % (link, target))
                 os.symlink(target, link)
 
     mock_sys_dev_path.side_effect = sys_dev_path
 
 
 class TestGenerateFallbackConfig(CiTestCase):
-
     def setUp(self):
         super(TestGenerateFallbackConfig, self).setUp()
         self.add_patch(
-            "cloudinit.util.get_cmdline", "m_get_cmdline",
-            return_value="root=/dev/sda1")
+            "cloudinit.util.get_cmdline",
+            "m_get_cmdline",
+            return_value="root=/dev/sda1",
+        )
 
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_device_driver_v2(self, mock_get_devicelist, mock_read_sys_net,
-                              mock_sys_dev_path):
+    def test_device_driver_v2(
+        self, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+    ):
         """Network configuration for generate_fallback_config is version 2."""
         devices = {
-            'eth0': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'hv_netsvc', 'device/device': '0x3',
-                'name_assign_type': '4'},
-            'eth1': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'mlx4_core', 'device/device': '0x7',
-                'name_assign_type': '4'},
-
+            "eth0": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "hv_netsvc",
+                "device/device": "0x3",
+                "name_assign_type": "4",
+            },
+            "eth1": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "mlx4_core",
+                "device/device": "0x7",
+                "name_assign_type": "4",
+            },
         }
 
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path,
-                    dev_attrs=devices)
+        _setup_test(
+            tmp_dir,
+            mock_get_devicelist,
+            mock_read_sys_net,
+            mock_sys_dev_path,
+            dev_attrs=devices,
+        )
 
         network_cfg = net.generate_fallback_config(config_driver=True)
         expected = {
-            'ethernets': {'eth0': {'dhcp4': True, 'set-name': 'eth0',
-                                   'match': {'macaddress': '00:11:22:33:44:55',
-                                             'driver': 'hv_netsvc'}}},
-            'version': 2}
+            "ethernets": {
+                "eth0": {
+                    "dhcp4": True,
+                    "set-name": "eth0",
+                    "match": {
+                        "macaddress": "00:11:22:33:44:55",
+                        "driver": "hv_netsvc",
+                    },
+                }
+            },
+            "version": 2,
+        }
         self.assertEqual(expected, network_cfg)
 
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_device_driver(self, mock_get_devicelist, mock_read_sys_net,
-                           mock_sys_dev_path):
+    def test_device_driver(
+        self, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+    ):
         devices = {
-            'eth0': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'hv_netsvc', 'device/device': '0x3',
-                'name_assign_type': '4'},
-            'eth1': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'mlx4_core', 'device/device': '0x7',
-                'name_assign_type': '4'},
-
+            "eth0": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "hv_netsvc",
+                "device/device": "0x3",
+                "name_assign_type": "4",
+            },
+            "eth1": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "mlx4_core",
+                "device/device": "0x7",
+                "name_assign_type": "4",
+            },
         }
 
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path,
-                    dev_attrs=devices)
+        _setup_test(
+            tmp_dir,
+            mock_get_devicelist,
+            mock_read_sys_net,
+            mock_sys_dev_path,
+            dev_attrs=devices,
+        )
 
         network_cfg = net.generate_fallback_config(config_driver=True)
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
 
         # don't set rulepath so eni writes them
         renderer = eni.Renderer(
-            {'eni_path': 'interfaces', 'netrules_path': 'netrules'})
+            {"eni_path": "interfaces", "netrules_path": "netrules"}
+        )
         renderer.render_network_state(ns, target=render_dir)
 
-        self.assertTrue(os.path.exists(os.path.join(render_dir,
-                                                    'interfaces')))
-        with open(os.path.join(render_dir, 'interfaces')) as fh:
+        self.assertTrue(os.path.exists(os.path.join(render_dir, "interfaces")))
+        with open(os.path.join(render_dir, "interfaces")) as fh:
             contents = fh.read()
         print(contents)
         expected = """
@@ -2857,8 +3321,8 @@ iface eth0 inet dhcp
 """
         self.assertEqual(expected.lstrip(), contents.lstrip())
 
-        self.assertTrue(os.path.exists(os.path.join(render_dir, 'netrules')))
-        with open(os.path.join(render_dir, 'netrules')) as fh:
+        self.assertTrue(os.path.exists(os.path.join(render_dir, "netrules")))
+        with open(os.path.join(render_dir, "netrules")) as fh:
             contents = fh.read()
         print(contents)
         expected_rule = [
@@ -2868,48 +3332,65 @@ iface eth0 inet dhcp
             'ATTR{address}=="00:11:22:33:44:55"',
             'NAME="eth0"',
         ]
-        self.assertEqual(", ".join(expected_rule) + '\n', contents.lstrip())
+        self.assertEqual(", ".join(expected_rule) + "\n", contents.lstrip())
 
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_device_driver_blacklist(self, mock_get_devicelist,
-                                     mock_read_sys_net, mock_sys_dev_path):
+    def test_device_driver_blacklist(
+        self, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+    ):
         devices = {
-            'eth1': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'hv_netsvc', 'device/device': '0x3',
-                'name_assign_type': '4'},
-            'eth0': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'mlx4_core', 'device/device': '0x7',
-                'name_assign_type': '4'},
+            "eth1": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "hv_netsvc",
+                "device/device": "0x3",
+                "name_assign_type": "4",
+            },
+            "eth0": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "mlx4_core",
+                "device/device": "0x7",
+                "name_assign_type": "4",
+            },
         }
 
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path,
-                    dev_attrs=devices)
+        _setup_test(
+            tmp_dir,
+            mock_get_devicelist,
+            mock_read_sys_net,
+            mock_sys_dev_path,
+            dev_attrs=devices,
+        )
 
-        blacklist = ['mlx4_core']
-        network_cfg = net.generate_fallback_config(blacklist_drivers=blacklist,
-                                                   config_driver=True)
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        blacklist = ["mlx4_core"]
+        network_cfg = net.generate_fallback_config(
+            blacklist_drivers=blacklist, config_driver=True
+        )
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
 
         # don't set rulepath so eni writes them
         renderer = eni.Renderer(
-            {'eni_path': 'interfaces', 'netrules_path': 'netrules'})
+            {"eni_path": "interfaces", "netrules_path": "netrules"}
+        )
         renderer.render_network_state(ns, target=render_dir)
 
-        self.assertTrue(os.path.exists(os.path.join(render_dir,
-                                                    'interfaces')))
-        with open(os.path.join(render_dir, 'interfaces')) as fh:
+        self.assertTrue(os.path.exists(os.path.join(render_dir, "interfaces")))
+        with open(os.path.join(render_dir, "interfaces")) as fh:
             contents = fh.read()
         print(contents)
         expected = """
@@ -2921,8 +3402,8 @@ iface eth1 inet dhcp
 """
         self.assertEqual(expected.lstrip(), contents.lstrip())
 
-        self.assertTrue(os.path.exists(os.path.join(render_dir, 'netrules')))
-        with open(os.path.join(render_dir, 'netrules')) as fh:
+        self.assertTrue(os.path.exists(os.path.join(render_dir, "netrules")))
+        with open(os.path.join(render_dir, "netrules")) as fh:
             contents = fh.read()
         print(contents)
         expected_rule = [
@@ -2932,35 +3413,54 @@ iface eth1 inet dhcp
             'ATTR{address}=="00:11:22:33:44:55"',
             'NAME="eth1"',
         ]
-        self.assertEqual(", ".join(expected_rule) + '\n', contents.lstrip())
+        self.assertEqual(", ".join(expected_rule) + "\n", contents.lstrip())
 
     @mock.patch("cloudinit.util.get_cmdline")
     @mock.patch("cloudinit.util.udevadm_settle")
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_unstable_names(self, mock_get_devicelist, mock_read_sys_net,
-                            mock_sys_dev_path, mock_settle, m_get_cmdline):
+    def test_unstable_names(
+        self,
+        mock_get_devicelist,
+        mock_read_sys_net,
+        mock_sys_dev_path,
+        mock_settle,
+        m_get_cmdline,
+    ):
         """verify that udevadm settle is called when we find unstable names"""
         devices = {
-            'eth0': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'hv_netsvc', 'device/device': '0x3',
-                'name_assign_type': False},
-            'ens4': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'mlx4_core', 'device/device': '0x7',
-                'name_assign_type': '4'},
-
+            "eth0": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "hv_netsvc",
+                "device/device": "0x3",
+                "name_assign_type": False,
+            },
+            "ens4": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "mlx4_core",
+                "device/device": "0x7",
+                "name_assign_type": "4",
+            },
         }
 
-        m_get_cmdline.return_value = ''
+        m_get_cmdline.return_value = ""
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path,
-                    dev_attrs=devices)
+        _setup_test(
+            tmp_dir,
+            mock_get_devicelist,
+            mock_read_sys_net,
+            mock_sys_dev_path,
+            dev_attrs=devices,
+        )
         net.generate_fallback_config(config_driver=True)
         self.assertEqual(1, mock_settle.call_count)
 
@@ -2969,52 +3469,73 @@ iface eth1 inet dhcp
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_unstable_names_disabled(self, mock_get_devicelist,
-                                     mock_read_sys_net, mock_sys_dev_path,
-                                     mock_settle, m_get_cmdline):
+    def test_unstable_names_disabled(
+        self,
+        mock_get_devicelist,
+        mock_read_sys_net,
+        mock_sys_dev_path,
+        mock_settle,
+        m_get_cmdline,
+    ):
         """verify udevadm settle not called when cmdline has net.ifnames=0"""
         devices = {
-            'eth0': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'hv_netsvc', 'device/device': '0x3',
-                'name_assign_type': False},
-            'ens4': {
-                'bridge': False, 'carrier': False, 'dormant': False,
-                'operstate': 'down', 'address': '00:11:22:33:44:55',
-                'device/driver': 'mlx4_core', 'device/device': '0x7',
-                'name_assign_type': '4'},
-
+            "eth0": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "hv_netsvc",
+                "device/device": "0x3",
+                "name_assign_type": False,
+            },
+            "ens4": {
+                "bridge": False,
+                "carrier": False,
+                "dormant": False,
+                "operstate": "down",
+                "address": "00:11:22:33:44:55",
+                "device/driver": "mlx4_core",
+                "device/device": "0x7",
+                "name_assign_type": "4",
+            },
         }
 
-        m_get_cmdline.return_value = 'net.ifnames=0'
+        m_get_cmdline.return_value = "net.ifnames=0"
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path,
-                    dev_attrs=devices)
+        _setup_test(
+            tmp_dir,
+            mock_get_devicelist,
+            mock_read_sys_net,
+            mock_sys_dev_path,
+            dev_attrs=devices,
+        )
         net.generate_fallback_config(config_driver=True)
         self.assertEqual(0, mock_settle.call_count)
 
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestRhelSysConfigRendering(CiTestCase):
 
     with_logs = True
 
     nm_cfg_file = "/etc/NetworkManager/NetworkManager.conf"
-    scripts_dir = '/etc/sysconfig/network-scripts'
-    header = ('# Created by cloud-init on instance boot automatically, '
-              'do not edit.\n#\n')
+    scripts_dir = "/etc/sysconfig/network-scripts"
+    header = (
+        "# Created by cloud-init on instance boot automatically, "
+        "do not edit.\n#\n"
+    )
 
-    expected_name = 'expected_sysconfig_rhel'
+    expected_name = "expected_sysconfig_rhel"
 
     def _get_renderer(self):
-        distro_cls = distros.fetch('rhel')
+        distro_cls = distros.fetch("rhel")
         return sysconfig.Renderer(
-            config=distro_cls.renderer_configs.get('sysconfig'))
+            config=distro_cls.renderer_configs.get("sysconfig")
+        )
 
     def _render_and_read(self, network_config=None, state=None, dir=None):
         if dir is None:
@@ -3032,9 +3553,8 @@ class TestRhelSysConfigRendering(CiTestCase):
         return dir2dict(dir)
 
     def _compare_files_to_expected(self, expected, found):
-
         def _try_load(f):
-            ''' Attempt to load shell content, otherwise return as-is '''
+            """Attempt to load shell content, otherwise return as-is"""
             try:
                 return util.load_shell_content(f)
             except ValueError:
@@ -3045,12 +3565,15 @@ class TestRhelSysConfigRendering(CiTestCase):
         orig_maxdiff = self.maxDiff
         expected_d = dict(
             (os.path.join(self.scripts_dir, k), _try_load(v))
-            for k, v in expected.items())
+            for k, v in expected.items()
+        )
 
         # only compare the files in scripts_dir
         scripts_found = dict(
-            (k, _try_load(v)) for k, v in found.items()
-            if k.startswith(self.scripts_dir))
+            (k, _try_load(v))
+            for k, v in found.items()
+            if k.startswith(self.scripts_dir)
+        )
         try:
             self.maxDiff = None
             self.assertEqual(expected_d, scripts_found)
@@ -3058,9 +3581,14 @@ class TestRhelSysConfigRendering(CiTestCase):
             self.maxDiff = orig_maxdiff
 
     def _assert_headers(self, found):
-        missing = [f for f in found
-                   if (f.startswith(self.scripts_dir) and
-                       not found[f].startswith(self.header))]
+        missing = [
+            f
+            for f in found
+            if (
+                f.startswith(self.scripts_dir)
+                and not found[f].startswith(self.header)
+            )
+        ]
         if missing:
             raise AssertionError("Missing headers in: %s" % missing)
 
@@ -3068,16 +3596,22 @@ class TestRhelSysConfigRendering(CiTestCase):
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_default_generation(self, mock_get_devicelist,
-                                mock_read_sys_net,
-                                mock_sys_dev_path, m_get_cmdline):
+    def test_default_generation(
+        self,
+        mock_get_devicelist,
+        mock_read_sys_net,
+        mock_sys_dev_path,
+        m_get_cmdline,
+    ):
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path)
+        _setup_test(
+            tmp_dir, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+        )
 
         network_cfg = net.generate_fallback_config()
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
@@ -3085,7 +3619,7 @@ class TestRhelSysConfigRendering(CiTestCase):
         renderer = self._get_renderer()
         renderer.render_network_state(ns, target=render_dir)
 
-        render_file = 'etc/sysconfig/network-scripts/ifcfg-eth1000'
+        render_file = "etc/sysconfig/network-scripts/ifcfg-eth1000"
         with open(os.path.join(render_dir, render_file)) as fh:
             content = fh.read()
             expected_content = """
@@ -3105,35 +3639,44 @@ USERCTL=no
         """ValueError is raised when duplicate ipv4 gateways exist."""
         net_json = {
             "services": [{"type": "dns", "address": "172.19.0.12"}],
-            "networks": [{
-                "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
-                "type": "ipv4", "netmask": "255.255.252.0",
-                "link": "tap1a81968a-79",
-                "routes": [{
-                    "netmask": "0.0.0.0",
-                    "network": "0.0.0.0",
-                    "gateway": "172.19.3.254",
-                }, {
-                    "netmask": "0.0.0.0",  # A second default gateway
-                    "network": "0.0.0.0",
-                    "gateway": "172.20.3.254",
-                }],
-                "ip_address": "172.19.1.34", "id": "network0"
-            }],
+            "networks": [
+                {
+                    "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
+                    "type": "ipv4",
+                    "netmask": "255.255.252.0",
+                    "link": "tap1a81968a-79",
+                    "routes": [
+                        {
+                            "netmask": "0.0.0.0",
+                            "network": "0.0.0.0",
+                            "gateway": "172.19.3.254",
+                        },
+                        {
+                            "netmask": "0.0.0.0",  # A second default gateway
+                            "network": "0.0.0.0",
+                            "gateway": "172.20.3.254",
+                        },
+                    ],
+                    "ip_address": "172.19.1.34",
+                    "id": "network0",
+                }
+            ],
             "links": [
                 {
                     "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-                    "mtu": None, "type": "bridge", "id":
-                    "tap1a81968a-79",
-                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+                    "mtu": None,
+                    "type": "bridge",
+                    "id": "tap1a81968a-79",
+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f",
                 },
             ],
         }
-        macs = {'fa:16:3e:ed:9a:59': 'eth0'}
+        macs = {"fa:16:3e:ed:9a:59": "eth0"}
         render_dir = self.tmp_dir()
         network_cfg = openstack.convert_net_json(net_json, known_macs=macs)
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
         renderer = self._get_renderer()
         with self.assertRaises(ValueError):
             renderer.render_network_state(ns, target=render_dir)
@@ -3143,35 +3686,44 @@ USERCTL=no
         """ValueError is raised when duplicate ipv6 gateways exist."""
         net_json = {
             "services": [{"type": "dns", "address": "172.19.0.12"}],
-            "networks": [{
-                "network_id": "public-ipv6",
-                "type": "ipv6", "netmask": "",
-                "link": "tap1a81968a-79",
-                "routes": [{
-                    "gateway": "2001:DB8::1",
-                    "netmask": "::",
-                    "network": "::"
-                }, {
-                    "gateway": "2001:DB9::1",
-                    "netmask": "::",
-                    "network": "::"
-                }],
-                "ip_address": "2001:DB8::10", "id": "network1"
-            }],
+            "networks": [
+                {
+                    "network_id": "public-ipv6",
+                    "type": "ipv6",
+                    "netmask": "",
+                    "link": "tap1a81968a-79",
+                    "routes": [
+                        {
+                            "gateway": "2001:DB8::1",
+                            "netmask": "::",
+                            "network": "::",
+                        },
+                        {
+                            "gateway": "2001:DB9::1",
+                            "netmask": "::",
+                            "network": "::",
+                        },
+                    ],
+                    "ip_address": "2001:DB8::10",
+                    "id": "network1",
+                }
+            ],
             "links": [
                 {
                     "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-                    "mtu": None, "type": "bridge", "id":
-                    "tap1a81968a-79",
-                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+                    "mtu": None,
+                    "type": "bridge",
+                    "id": "tap1a81968a-79",
+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f",
                 },
             ],
         }
-        macs = {'fa:16:3e:ed:9a:59': 'eth0'}
+        macs = {"fa:16:3e:ed:9a:59": "eth0"}
         render_dir = self.tmp_dir()
         network_cfg = openstack.convert_net_json(net_json, known_macs=macs)
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
         renderer = self._get_renderer()
         with self.assertRaises(ValueError):
             renderer.render_network_state(ns, target=render_dir)
@@ -3180,19 +3732,22 @@ USERCTL=no
     def test_openstack_rendering_samples(self):
         for os_sample in OS_SAMPLES:
             render_dir = self.tmp_dir()
-            ex_input = os_sample['in_data']
-            ex_mac_addrs = os_sample['in_macs']
+            ex_input = os_sample["in_data"]
+            ex_mac_addrs = os_sample["in_macs"]
             network_cfg = openstack.convert_net_json(
-                ex_input, known_macs=ex_mac_addrs)
-            ns = network_state.parse_net_config_data(network_cfg,
-                                                     skip_broken=False)
+                ex_input, known_macs=ex_mac_addrs
+            )
+            ns = network_state.parse_net_config_data(
+                network_cfg, skip_broken=False
+            )
             renderer = self._get_renderer()
             # render a multiple times to simulate reboots
             renderer.render_network_state(ns, target=render_dir)
             renderer.render_network_state(ns, target=render_dir)
             renderer.render_network_state(ns, target=render_dir)
-            for fn, expected_content in os_sample.get('out_sysconfig_rhel',
-                                                      []):
+            for fn, expected_content in os_sample.get(
+                "out_sysconfig_rhel", []
+            ):
                 with open(os.path.join(render_dir, fn)) as fh:
                     self.assertEqual(expected_content, fh.read())
 
@@ -3203,8 +3758,8 @@ USERCTL=no
         renderer = self._get_renderer()
         renderer.render_network_state(ns, target=render_dir)
         found = dir2dict(render_dir)
-        nspath = '/etc/sysconfig/network-scripts/'
-        self.assertNotIn(nspath + 'ifcfg-lo', found.keys())
+        nspath = "/etc/sysconfig/network-scripts/"
+        self.assertNotIn(nspath + "ifcfg-lo", found.keys())
         expected = """\
 # Created by cloud-init on instance boot automatically, do not edit.
 #
@@ -3220,10 +3775,10 @@ ONBOOT=yes
 TYPE=Ethernet
 USERCTL=no
 """
-        self.assertEqual(expected, found[nspath + 'ifcfg-interface0'])
+        self.assertEqual(expected, found[nspath + "ifcfg-interface0"])
         # The configuration has no nameserver information make sure we
         # do not write the resolv.conf file
-        respath = '/etc/resolv.conf'
+        respath = "/etc/resolv.conf"
         self.assertNotIn(respath, found.keys())
 
     def test_network_config_v1_multi_iface_samples(self):
@@ -3233,8 +3788,8 @@ USERCTL=no
         renderer = self._get_renderer()
         renderer.render_network_state(ns, target=render_dir)
         found = dir2dict(render_dir)
-        nspath = '/etc/sysconfig/network-scripts/'
-        self.assertNotIn(nspath + 'ifcfg-lo', found.keys())
+        nspath = "/etc/sysconfig/network-scripts/"
+        self.assertNotIn(nspath + "ifcfg-lo", found.keys())
         expected_i1 = """\
 # Created by cloud-init on instance boot automatically, do not edit.
 #
@@ -3251,7 +3806,7 @@ ONBOOT=yes
 TYPE=Ethernet
 USERCTL=no
 """
-        self.assertEqual(expected_i1, found[nspath + 'ifcfg-eth0'])
+        self.assertEqual(expected_i1, found[nspath + "ifcfg-eth0"])
         expected_i2 = """\
 # Created by cloud-init on instance boot automatically, do not edit.
 #
@@ -3265,21 +3820,21 @@ ONBOOT=yes
 TYPE=Ethernet
 USERCTL=no
 """
-        self.assertEqual(expected_i2, found[nspath + 'ifcfg-eth1'])
+        self.assertEqual(expected_i2, found[nspath + "ifcfg-eth1"])
 
     def test_config_with_explicit_loopback(self):
         ns = network_state.parse_net_config_data(CONFIG_V1_EXPLICIT_LOOPBACK)
         render_dir = self.tmp_path("render")
         os.makedirs(render_dir)
         # write an etc/resolv.conf and expect it to not be modified
-        resolvconf = os.path.join(render_dir, 'etc/resolv.conf')
+        resolvconf = os.path.join(render_dir, "etc/resolv.conf")
         resolvconf_content = "# Original Content"
         util.write_file(resolvconf, resolvconf_content)
         renderer = self._get_renderer()
         renderer.render_network_state(ns, target=render_dir)
         found = dir2dict(render_dir)
-        nspath = '/etc/sysconfig/network-scripts/'
-        self.assertNotIn(nspath + 'ifcfg-lo', found.keys())
+        nspath = "/etc/sysconfig/network-scripts/"
+        self.assertNotIn(nspath + "ifcfg-lo", found.keys())
         expected = """\
 # Created by cloud-init on instance boot automatically, do not edit.
 #
@@ -3290,171 +3845,188 @@ ONBOOT=yes
 TYPE=Ethernet
 USERCTL=no
 """
-        self.assertEqual(expected, found[nspath + 'ifcfg-eth0'])
+        self.assertEqual(expected, found[nspath + "ifcfg-eth0"])
         # a dhcp only config should not modify resolv.conf
-        self.assertEqual(resolvconf_content, found['/etc/resolv.conf'])
+        self.assertEqual(resolvconf_content, found["/etc/resolv.conf"])
 
     def test_bond_config(self):
-        entry = NETWORK_CONFIGS['bond']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["bond"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_vlan_config(self):
-        entry = NETWORK_CONFIGS['vlan']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["vlan"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_bridge_config(self):
-        entry = NETWORK_CONFIGS['bridge']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["bridge"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_manual_config(self):
-        entry = NETWORK_CONFIGS['manual']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["manual"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_all_config(self):
-        entry = NETWORK_CONFIGS['all']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["all"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
         self.assertNotIn(
-            'WARNING: Network config: ignoring eth0.101 device-level mtu',
-            self.logs.getvalue())
+            "WARNING: Network config: ignoring eth0.101 device-level mtu",
+            self.logs.getvalue(),
+        )
 
     def test_small_config(self):
-        entry = NETWORK_CONFIGS['small']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["small"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_v4_and_v6_static_config(self):
-        entry = NETWORK_CONFIGS['v4_and_v6_static']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v4_and_v6_static"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
         expected_msg = (
-            'WARNING: Network config: ignoring iface0 device-level mtu:8999'
-            ' because ipv4 subnet-level mtu:9000 provided.')
+            "WARNING: Network config: ignoring iface0 device-level mtu:8999"
+            " because ipv4 subnet-level mtu:9000 provided."
+        )
         self.assertIn(expected_msg, self.logs.getvalue())
 
     def test_dhcpv6_only_config(self):
-        entry = NETWORK_CONFIGS['dhcpv6_only']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_only"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_dhcpv6_accept_ra_config_v1(self):
-        entry = NETWORK_CONFIGS['dhcpv6_accept_ra']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        entry = NETWORK_CONFIGS["dhcpv6_accept_ra"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_dhcpv6_accept_ra_config_v2(self):
-        entry = NETWORK_CONFIGS['dhcpv6_accept_ra']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["dhcpv6_accept_ra"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_dhcpv6_reject_ra_config_v1(self):
-        entry = NETWORK_CONFIGS['dhcpv6_reject_ra']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        entry = NETWORK_CONFIGS["dhcpv6_reject_ra"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_stattic6_from_json(self):
         net_json = {
             "services": [{"type": "dns", "address": "172.19.0.12"}],
-            "networks": [{
-                "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
-                "type": "ipv4", "netmask": "255.255.252.0",
-                "link": "tap1a81968a-79",
-                "routes": [{
-                    "netmask": "0.0.0.0",
-                    "network": "0.0.0.0",
-                    "gateway": "172.19.3.254",
-                }, {
-                    "netmask": "0.0.0.0",  # A second default gateway
-                    "network": "0.0.0.0",
-                    "gateway": "172.20.3.254",
-                }],
-                "ip_address": "172.19.1.34", "id": "network0"
-            }, {
-                "network_id": "mgmt",
-                "netmask": "ffff:ffff:ffff:ffff::",
-                "link": "interface1",
-                "mode": "link-local",
-                "routes": [],
-                "ip_address": "fe80::c096:67ff:fe5c:6e84",
-                "type": "static6",
-                "id": "network1",
-                "services": [],
-                "accept-ra": "false"
-            }],
+            "networks": [
+                {
+                    "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
+                    "type": "ipv4",
+                    "netmask": "255.255.252.0",
+                    "link": "tap1a81968a-79",
+                    "routes": [
+                        {
+                            "netmask": "0.0.0.0",
+                            "network": "0.0.0.0",
+                            "gateway": "172.19.3.254",
+                        },
+                        {
+                            "netmask": "0.0.0.0",  # A second default gateway
+                            "network": "0.0.0.0",
+                            "gateway": "172.20.3.254",
+                        },
+                    ],
+                    "ip_address": "172.19.1.34",
+                    "id": "network0",
+                },
+                {
+                    "network_id": "mgmt",
+                    "netmask": "ffff:ffff:ffff:ffff::",
+                    "link": "interface1",
+                    "mode": "link-local",
+                    "routes": [],
+                    "ip_address": "fe80::c096:67ff:fe5c:6e84",
+                    "type": "static6",
+                    "id": "network1",
+                    "services": [],
+                    "accept-ra": "false",
+                },
+            ],
             "links": [
                 {
                     "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-                    "mtu": None, "type": "bridge", "id":
-                    "tap1a81968a-79",
-                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+                    "mtu": None,
+                    "type": "bridge",
+                    "id": "tap1a81968a-79",
+                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f",
                 },
             ],
         }
-        macs = {'fa:16:3e:ed:9a:59': 'eth0'}
+        macs = {"fa:16:3e:ed:9a:59": "eth0"}
         render_dir = self.tmp_dir()
         network_cfg = openstack.convert_net_json(net_json, known_macs=macs)
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
         renderer = self._get_renderer()
         with self.assertRaises(ValueError):
             renderer.render_network_state(ns, target=render_dir)
         self.assertEqual([], os.listdir(render_dir))
 
     def test_static6_from_yaml(self):
-        entry = NETWORK_CONFIGS['static6']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml']))
+        entry = NETWORK_CONFIGS["static6"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_dhcpv6_reject_ra_config_v2(self):
-        entry = NETWORK_CONFIGS['dhcpv6_reject_ra']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["dhcpv6_reject_ra"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_dhcpv6_stateless_config(self):
-        entry = NETWORK_CONFIGS['dhcpv6_stateless']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_stateless"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_dhcpv6_stateful_config(self):
-        entry = NETWORK_CONFIGS['dhcpv6_stateful']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_stateful"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_wakeonlan_disabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_disabled']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_disabled"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_wakeonlan_enabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_enabled']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_enabled"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
@@ -3465,20 +4037,21 @@ USERCTL=no
         util.ensure_dir(os.path.dirname(nm_cfg))
 
         # write a template nm.conf, note plugins is a list here
-        with open(nm_cfg, 'w') as fh:
-            fh.write('# test_check_ifcfg_rh\n[main]\nplugins=foo,bar\n')
+        with open(nm_cfg, "w") as fh:
+            fh.write("# test_check_ifcfg_rh\n[main]\nplugins=foo,bar\n")
         self.assertTrue(os.path.exists(nm_cfg))
 
         # render and read
-        entry = NETWORK_CONFIGS['small']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']),
-                                      dir=render_dir)
+        entry = NETWORK_CONFIGS["small"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml"]), dir=render_dir
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
         # check ifcfg-rh is in the 'plugins' list
         config = sysconfig.ConfigObj(nm_cfg)
-        self.assertIn('ifcfg-rh', config['main']['plugins'])
+        self.assertIn("ifcfg-rh", config["main"]["plugins"])
 
     def test_check_ifcfg_rh_plugins_string(self):
         """ifcfg-rh plugin is append when plugins is a string."""
@@ -3488,22 +4061,23 @@ USERCTL=no
         util.ensure_dir(os.path.dirname(nm_cfg))
 
         # write a template nm.conf, note plugins is a value here
-        util.write_file(nm_cfg, '# test_check_ifcfg_rh\n[main]\nplugins=foo\n')
+        util.write_file(nm_cfg, "# test_check_ifcfg_rh\n[main]\nplugins=foo\n")
 
         # render and read
-        entry = NETWORK_CONFIGS['small']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']),
-                                      dir=render_dir)
+        entry = NETWORK_CONFIGS["small"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml"]), dir=render_dir
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
         # check raw content has plugin
         nm_file_content = util.load_file(nm_cfg)
-        self.assertIn('ifcfg-rh', nm_file_content)
+        self.assertIn("ifcfg-rh", nm_file_content)
 
         # check ifcfg-rh is in the 'plugins' list
         config = sysconfig.ConfigObj(nm_cfg)
-        self.assertIn('ifcfg-rh', config['main']['plugins'])
+        self.assertIn("ifcfg-rh", config["main"]["plugins"])
 
     def test_check_ifcfg_rh_plugins_no_plugins(self):
         """enable_ifcfg_plugin creates plugins value if missing."""
@@ -3513,28 +4087,32 @@ USERCTL=no
         util.ensure_dir(os.path.dirname(nm_cfg))
 
         # write a template nm.conf, note plugins is missing
-        util.write_file(nm_cfg, '# test_check_ifcfg_rh\n[main]\n')
+        util.write_file(nm_cfg, "# test_check_ifcfg_rh\n[main]\n")
         self.assertTrue(os.path.exists(nm_cfg))
 
         # render and read
-        entry = NETWORK_CONFIGS['small']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']),
-                                      dir=render_dir)
+        entry = NETWORK_CONFIGS["small"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml"]), dir=render_dir
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
         # check ifcfg-rh is in the 'plugins' list
         config = sysconfig.ConfigObj(nm_cfg)
-        self.assertIn('ifcfg-rh', config['main']['plugins'])
+        self.assertIn("ifcfg-rh", config["main"]["plugins"])
 
     def test_netplan_dhcp_false_disable_dhcp_in_state(self):
         """netplan config with dhcp[46]: False should not add dhcp in state"""
         net_config = yaml.load(NETPLAN_DHCP_FALSE)
-        ns = network_state.parse_net_config_data(net_config,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(net_config, skip_broken=False)
 
-        dhcp_found = [snet for iface in ns.iter_interfaces()
-                      for snet in iface['subnets'] if 'dhcp' in snet['type']]
+        dhcp_found = [
+            snet
+            for iface in ns.iter_interfaces()
+            for snet in iface["subnets"]
+            if "dhcp" in snet["type"]
+        ]
 
         self.assertEqual([], dhcp_found)
 
@@ -3542,9 +4120,10 @@ USERCTL=no
         """netplan cfg with dhcp[46]: False should not have bootproto=dhcp"""
 
         entry = {
-            'yaml': NETPLAN_DHCP_FALSE,
-            'expected_sysconfig': {
-                'ifcfg-ens3': textwrap.dedent("""\
+            "yaml": NETPLAN_DHCP_FALSE,
+            "expected_sysconfig": {
+                "ifcfg-ens3": textwrap.dedent(
+                    """\
                    BOOTPROTO=none
                    DEFROUTE=yes
                    DEVICE=ens3
@@ -3564,33 +4143,42 @@ USERCTL=no
                    ONBOOT=yes
                    TYPE=Ethernet
                    USERCTL=no
-                   """),
-            }
+                   """
+                ),
+            },
         }
 
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
-        self._compare_files_to_expected(entry['expected_sysconfig'], found)
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
+        self._compare_files_to_expected(entry["expected_sysconfig"], found)
         self._assert_headers(found)
 
     def test_from_v2_vlan_mtu(self):
         """verify mtu gets rendered on bond when source is netplan."""
         v2data = {
-            'version': 2,
-            'ethernets': {'eno1': {}},
-            'vlans': {
-                'eno1.1000': {
-                    'addresses': ["192.6.1.9/24"],
-                    'id': 1000, 'link': 'eno1', 'mtu': 1495}}}
+            "version": 2,
+            "ethernets": {"eno1": {}},
+            "vlans": {
+                "eno1.1000": {
+                    "addresses": ["192.6.1.9/24"],
+                    "id": 1000,
+                    "link": "eno1",
+                    "mtu": 1495,
+                }
+            },
+        }
         expected = {
-            'ifcfg-eno1': textwrap.dedent("""\
+            "ifcfg-eno1": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eno1
                 NM_CONTROLLED=no
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
-            'ifcfg-eno1.1000': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-eno1.1000": textwrap.dedent(
+                """\
                 BOOTPROTO=none
                 DEVICE=eno1.1000
                 IPADDR=192.6.1.9
@@ -3601,23 +4189,29 @@ USERCTL=no
                 PHYSDEV=eno1
                 USERCTL=no
                 VLAN=yes
-                """)
+                """
+            ),
         }
         self._compare_files_to_expected(
-            expected, self._render_and_read(network_config=v2data))
+            expected, self._render_and_read(network_config=v2data)
+        )
 
     def test_from_v2_bond_mtu(self):
         """verify mtu gets rendered on bond when source is netplan."""
         v2data = {
-            'version': 2,
-            'bonds': {
-                'bond0': {'addresses': ['10.101.8.65/26'],
-                          'interfaces': ['enp0s0', 'enp0s1'],
-                          'mtu': 1334,
-                          'parameters': {}}}
+            "version": 2,
+            "bonds": {
+                "bond0": {
+                    "addresses": ["10.101.8.65/26"],
+                    "interfaces": ["enp0s0", "enp0s1"],
+                    "mtu": 1334,
+                    "parameters": {},
+                }
+            },
         }
         expected = {
-            'ifcfg-bond0': textwrap.dedent("""\
+            "ifcfg-bond0": textwrap.dedent(
+                """\
                 BONDING_MASTER=yes
                 BONDING_SLAVE0=enp0s0
                 BONDING_SLAVE1=enp0s1
@@ -3630,8 +4224,10 @@ USERCTL=no
                 ONBOOT=yes
                 TYPE=Bond
                 USERCTL=no
-                """),
-            'ifcfg-enp0s0': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-enp0s0": textwrap.dedent(
+                """\
                 BONDING_MASTER=yes
                 BOOTPROTO=none
                 DEVICE=enp0s0
@@ -3641,8 +4237,10 @@ USERCTL=no
                 SLAVE=yes
                 TYPE=Bond
                 USERCTL=no
-                """),
-            'ifcfg-enp0s1': textwrap.dedent("""\
+                """
+            ),
+            "ifcfg-enp0s1": textwrap.dedent(
+                """\
                 BONDING_MASTER=yes
                 BOOTPROTO=none
                 DEVICE=enp0s1
@@ -3652,21 +4250,28 @@ USERCTL=no
                 SLAVE=yes
                 TYPE=Bond
                 USERCTL=no
-                """)
+                """
+            ),
         }
         self._compare_files_to_expected(
-            expected, self._render_and_read(network_config=v2data))
+            expected, self._render_and_read(network_config=v2data)
+        )
 
     def test_from_v2_route_metric(self):
         """verify route-metric gets rendered on nic when source is netplan."""
-        overrides = {'route-metric': 100}
+        overrides = {"route-metric": 100}
         v2base = {
-            'version': 2,
-            'ethernets': {
-                'eno1': {'dhcp4': True,
-                         'match': {'macaddress': '07-1c-c6-75-a4-be'}}}}
+            "version": 2,
+            "ethernets": {
+                "eno1": {
+                    "dhcp4": True,
+                    "match": {"macaddress": "07-1c-c6-75-a4-be"},
+                }
+            },
+        }
         expected = {
-            'ifcfg-eno1': textwrap.dedent("""\
+            "ifcfg-eno1": textwrap.dedent(
+                """\
                 BOOTPROTO=dhcp
                 DEVICE=eno1
                 HWADDR=07-1c-c6-75-a4-be
@@ -3675,36 +4280,42 @@ USERCTL=no
                 ONBOOT=yes
                 TYPE=Ethernet
                 USERCTL=no
-                """),
+                """
+            ),
         }
-        for dhcp_ver in ('dhcp4', 'dhcp6'):
+        for dhcp_ver in ("dhcp4", "dhcp6"):
             v2data = copy.deepcopy(v2base)
-            if dhcp_ver == 'dhcp6':
-                expected['ifcfg-eno1'] += "IPV6INIT=yes\nDHCPV6C=yes\n"
-            v2data['ethernets']['eno1'].update(
-                {dhcp_ver: True, '{0}-overrides'.format(dhcp_ver): overrides})
+            if dhcp_ver == "dhcp6":
+                expected["ifcfg-eno1"] += "IPV6INIT=yes\nDHCPV6C=yes\n"
+            v2data["ethernets"]["eno1"].update(
+                {dhcp_ver: True, "{0}-overrides".format(dhcp_ver): overrides}
+            )
             self._compare_files_to_expected(
-                expected, self._render_and_read(network_config=v2data))
+                expected, self._render_and_read(network_config=v2data)
+            )
 
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestOpenSuseSysConfigRendering(CiTestCase):
 
     with_logs = True
 
-    scripts_dir = '/etc/sysconfig/network'
-    header = ('# Created by cloud-init on instance boot automatically, '
-              'do not edit.\n#\n')
+    scripts_dir = "/etc/sysconfig/network"
+    header = (
+        "# Created by cloud-init on instance boot automatically, "
+        "do not edit.\n#\n"
+    )
 
-    expected_name = 'expected_sysconfig_opensuse'
+    expected_name = "expected_sysconfig_opensuse"
 
     def _get_renderer(self):
-        distro_cls = distros.fetch('opensuse')
+        distro_cls = distros.fetch("opensuse")
         return sysconfig.Renderer(
-            config=distro_cls.renderer_configs.get('sysconfig'))
+            config=distro_cls.renderer_configs.get("sysconfig")
+        )
 
     def _render_and_read(self, network_config=None, state=None, dir=None):
         if dir is None:
@@ -3725,12 +4336,15 @@ class TestOpenSuseSysConfigRendering(CiTestCase):
         orig_maxdiff = self.maxDiff
         expected_d = dict(
             (os.path.join(self.scripts_dir, k), util.load_shell_content(v))
-            for k, v in expected.items())
+            for k, v in expected.items()
+        )
 
         # only compare the files in scripts_dir
         scripts_found = dict(
-            (k, util.load_shell_content(v)) for k, v in found.items()
-            if k.startswith(self.scripts_dir))
+            (k, util.load_shell_content(v))
+            for k, v in found.items()
+            if k.startswith(self.scripts_dir)
+        )
         try:
             self.maxDiff = None
             self.assertEqual(expected_d, scripts_found)
@@ -3738,9 +4352,14 @@ class TestOpenSuseSysConfigRendering(CiTestCase):
             self.maxDiff = orig_maxdiff
 
     def _assert_headers(self, found):
-        missing = [f for f in found
-                   if (f.startswith(self.scripts_dir) and
-                       not found[f].startswith(self.header))]
+        missing = [
+            f
+            for f in found
+            if (
+                f.startswith(self.scripts_dir)
+                and not found[f].startswith(self.header)
+            )
+        ]
         if missing:
             raise AssertionError("Missing headers in: %s" % missing)
 
@@ -3748,16 +4367,22 @@ class TestOpenSuseSysConfigRendering(CiTestCase):
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_default_generation(self, mock_get_devicelist,
-                                mock_read_sys_net,
-                                mock_sys_dev_path, m_get_cmdline):
+    def test_default_generation(
+        self,
+        mock_get_devicelist,
+        mock_read_sys_net,
+        mock_sys_dev_path,
+        m_get_cmdline,
+    ):
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path)
+        _setup_test(
+            tmp_dir, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+        )
 
         network_cfg = net.generate_fallback_config()
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
@@ -3765,7 +4390,7 @@ class TestOpenSuseSysConfigRendering(CiTestCase):
         renderer = self._get_renderer()
         renderer.render_network_state(ns, target=render_dir)
 
-        render_file = 'etc/sysconfig/network/ifcfg-eth1000'
+        render_file = "etc/sysconfig/network/ifcfg-eth1000"
         with open(os.path.join(render_dir, render_file)) as fh:
             content = fh.read()
             expected_content = """
@@ -3779,98 +4404,101 @@ STARTMODE=auto
 
     # TODO(rjschwei): re-enable test once route writing is implemented
     # for SUSE distros
-#    def test_multiple_ipv4_default_gateways(self):
-#        """ValueError is raised when duplicate ipv4 gateways exist."""
-#        net_json = {
-#            "services": [{"type": "dns", "address": "172.19.0.12"}],
-#            "networks": [{
-#                "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
-#                "type": "ipv4", "netmask": "255.255.252.0",
-#                "link": "tap1a81968a-79",
-#                "routes": [{
-#                    "netmask": "0.0.0.0",
-#                    "network": "0.0.0.0",
-#                    "gateway": "172.19.3.254",
-#                }, {
-#                    "netmask": "0.0.0.0",  # A second default gateway
-#                    "network": "0.0.0.0",
-#                    "gateway": "172.20.3.254",
-#                }],
-#                "ip_address": "172.19.1.34", "id": "network0"
-#            }],
-#            "links": [
-#                {
-#                    "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-#                    "mtu": None, "type": "bridge", "id":
-#                    "tap1a81968a-79",
-#                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
-#                },
-#            ],
-#        }
-#        macs = {'fa:16:3e:ed:9a:59': 'eth0'}
-#        render_dir = self.tmp_dir()
-#        network_cfg = openstack.convert_net_json(net_json, known_macs=macs)
-#        ns = network_state.parse_net_config_data(network_cfg,
-#                                                 skip_broken=False)
-#        renderer = self._get_renderer()
-#        with self.assertRaises(ValueError):
-#            renderer.render_network_state(ns, target=render_dir)
-#        self.assertEqual([], os.listdir(render_dir))
-#
-#    def test_multiple_ipv6_default_gateways(self):
-#        """ValueError is raised when duplicate ipv6 gateways exist."""
-#        net_json = {
-#            "services": [{"type": "dns", "address": "172.19.0.12"}],
-#            "networks": [{
-#                "network_id": "public-ipv6",
-#                "type": "ipv6", "netmask": "",
-#                "link": "tap1a81968a-79",
-#                "routes": [{
-#                    "gateway": "2001:DB8::1",
-#                    "netmask": "::",
-#                    "network": "::"
-#                }, {
-#                    "gateway": "2001:DB9::1",
-#                    "netmask": "::",
-#                    "network": "::"
-#                }],
-#                "ip_address": "2001:DB8::10", "id": "network1"
-#            }],
-#            "links": [
-#                {
-#                    "ethernet_mac_address": "fa:16:3e:ed:9a:59",
-#                    "mtu": None, "type": "bridge", "id":
-#                    "tap1a81968a-79",
-#                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
-#                },
-#            ],
-#        }
-#        macs = {'fa:16:3e:ed:9a:59': 'eth0'}
-#        render_dir = self.tmp_dir()
-#        network_cfg = openstack.convert_net_json(net_json, known_macs=macs)
-#        ns = network_state.parse_net_config_data(network_cfg,
-#                                                 skip_broken=False)
-#        renderer = self._get_renderer()
-#        with self.assertRaises(ValueError):
-#            renderer.render_network_state(ns, target=render_dir)
-#        self.assertEqual([], os.listdir(render_dir))
+    #    def test_multiple_ipv4_default_gateways(self):
+    #        """ValueError is raised when duplicate ipv4 gateways exist."""
+    #        net_json = {
+    #            "services": [{"type": "dns", "address": "172.19.0.12"}],
+    #            "networks": [{
+    #                "network_id": "dacd568d-5be6-4786-91fe-750c374b78b4",
+    #                "type": "ipv4", "netmask": "255.255.252.0",
+    #                "link": "tap1a81968a-79",
+    #                "routes": [{
+    #                    "netmask": "0.0.0.0",
+    #                    "network": "0.0.0.0",
+    #                    "gateway": "172.19.3.254",
+    #                }, {
+    #                    "netmask": "0.0.0.0",  # A second default gateway
+    #                    "network": "0.0.0.0",
+    #                    "gateway": "172.20.3.254",
+    #                }],
+    #                "ip_address": "172.19.1.34", "id": "network0"
+    #            }],
+    #            "links": [
+    #                {
+    #                    "ethernet_mac_address": "fa:16:3e:ed:9a:59",
+    #                    "mtu": None, "type": "bridge", "id":
+    #                    "tap1a81968a-79",
+    #                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+    #                },
+    #            ],
+    #        }
+    #        macs = {'fa:16:3e:ed:9a:59': 'eth0'}
+    #        render_dir = self.tmp_dir()
+    #        network_cfg = openstack.convert_net_json(net_json, known_macs=macs)  # noqa: E501
+    #        ns = network_state.parse_net_config_data(network_cfg,
+    #                                                 skip_broken=False)
+    #        renderer = self._get_renderer()
+    #        with self.assertRaises(ValueError):
+    #            renderer.render_network_state(ns, target=render_dir)
+    #        self.assertEqual([], os.listdir(render_dir))
+    #
+    #    def test_multiple_ipv6_default_gateways(self):
+    #        """ValueError is raised when duplicate ipv6 gateways exist."""
+    #        net_json = {
+    #            "services": [{"type": "dns", "address": "172.19.0.12"}],
+    #            "networks": [{
+    #                "network_id": "public-ipv6",
+    #                "type": "ipv6", "netmask": "",
+    #                "link": "tap1a81968a-79",
+    #                "routes": [{
+    #                    "gateway": "2001:DB8::1",
+    #                    "netmask": "::",
+    #                    "network": "::"
+    #                }, {
+    #                    "gateway": "2001:DB9::1",
+    #                    "netmask": "::",
+    #                    "network": "::"
+    #                }],
+    #                "ip_address": "2001:DB8::10", "id": "network1"
+    #            }],
+    #            "links": [
+    #                {
+    #                    "ethernet_mac_address": "fa:16:3e:ed:9a:59",
+    #                    "mtu": None, "type": "bridge", "id":
+    #                    "tap1a81968a-79",
+    #                    "vif_id": "1a81968a-797a-400f-8a80-567f997eb93f"
+    #                },
+    #            ],
+    #        }
+    #        macs = {'fa:16:3e:ed:9a:59': 'eth0'}
+    #        render_dir = self.tmp_dir()
+    #        network_cfg = openstack.convert_net_json(net_json, known_macs=macs)  # noqa: E501
+    #        ns = network_state.parse_net_config_data(network_cfg,
+    #                                                 skip_broken=False)
+    #        renderer = self._get_renderer()
+    #        with self.assertRaises(ValueError):
+    #            renderer.render_network_state(ns, target=render_dir)
+    #        self.assertEqual([], os.listdir(render_dir))
 
     def test_openstack_rendering_samples(self):
         for os_sample in OS_SAMPLES:
             render_dir = self.tmp_dir()
-            ex_input = os_sample['in_data']
-            ex_mac_addrs = os_sample['in_macs']
+            ex_input = os_sample["in_data"]
+            ex_mac_addrs = os_sample["in_macs"]
             network_cfg = openstack.convert_net_json(
-                ex_input, known_macs=ex_mac_addrs)
-            ns = network_state.parse_net_config_data(network_cfg,
-                                                     skip_broken=False)
+                ex_input, known_macs=ex_mac_addrs
+            )
+            ns = network_state.parse_net_config_data(
+                network_cfg, skip_broken=False
+            )
             renderer = self._get_renderer()
             # render a multiple times to simulate reboots
             renderer.render_network_state(ns, target=render_dir)
             renderer.render_network_state(ns, target=render_dir)
             renderer.render_network_state(ns, target=render_dir)
-            for fn, expected_content in os_sample.get('out_sysconfig_opensuse',
-                                                      []):
+            for fn, expected_content in os_sample.get(
+                "out_sysconfig_opensuse", []
+            ):
                 with open(os.path.join(render_dir, fn)) as fh:
                     self.assertEqual(expected_content, fh.read())
 
@@ -3881,8 +4509,8 @@ STARTMODE=auto
         renderer = self._get_renderer()
         renderer.render_network_state(ns, target=render_dir)
         found = dir2dict(render_dir)
-        nspath = '/etc/sysconfig/network/'
-        self.assertNotIn(nspath + 'ifcfg-lo', found.keys())
+        nspath = "/etc/sysconfig/network/"
+        self.assertNotIn(nspath + "ifcfg-lo", found.keys())
         expected = """\
 # Created by cloud-init on instance boot automatically, do not edit.
 #
@@ -3892,10 +4520,10 @@ LLADDR=52:54:00:12:34:00
 NETMASK=255.255.255.0
 STARTMODE=auto
 """
-        self.assertEqual(expected, found[nspath + 'ifcfg-interface0'])
+        self.assertEqual(expected, found[nspath + "ifcfg-interface0"])
         # The configuration has no nameserver information make sure we
         # do not write the resolv.conf file
-        respath = '/etc/resolv.conf'
+        respath = "/etc/resolv.conf"
         self.assertNotIn(respath, found.keys())
 
     def test_config_with_explicit_loopback(self):
@@ -3903,33 +4531,33 @@ STARTMODE=auto
         render_dir = self.tmp_path("render")
         os.makedirs(render_dir)
         # write an etc/resolv.conf and expect it to not be modified
-        resolvconf = os.path.join(render_dir, 'etc/resolv.conf')
+        resolvconf = os.path.join(render_dir, "etc/resolv.conf")
         resolvconf_content = "# Original Content"
         util.write_file(resolvconf, resolvconf_content)
         renderer = self._get_renderer()
         renderer.render_network_state(ns, target=render_dir)
         found = dir2dict(render_dir)
-        nspath = '/etc/sysconfig/network/'
-        self.assertNotIn(nspath + 'ifcfg-lo', found.keys())
+        nspath = "/etc/sysconfig/network/"
+        self.assertNotIn(nspath + "ifcfg-lo", found.keys())
         expected = """\
 # Created by cloud-init on instance boot automatically, do not edit.
 #
 BOOTPROTO=dhcp
 STARTMODE=auto
 """
-        self.assertEqual(expected, found[nspath + 'ifcfg-eth0'])
+        self.assertEqual(expected, found[nspath + "ifcfg-eth0"])
         # a dhcp only config should not modify resolv.conf
-        self.assertEqual(resolvconf_content, found['/etc/resolv.conf'])
+        self.assertEqual(resolvconf_content, found["/etc/resolv.conf"])
 
     def test_bond_config(self):
-        expected_name = 'expected_sysconfig_opensuse'
-        entry = NETWORK_CONFIGS['bond']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        expected_name = "expected_sysconfig_opensuse"
+        entry = NETWORK_CONFIGS["bond"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         for fname, contents in entry[expected_name].items():
             print(fname)
             print(contents)
             print()
-        print('-- expected ^ | v rendered --')
+        print("-- expected ^ | v rendered --")
         for fname, contents in found.items():
             print(fname)
             print(contents)
@@ -3938,120 +4566,129 @@ STARTMODE=auto
         self._assert_headers(found)
 
     def test_vlan_config(self):
-        entry = NETWORK_CONFIGS['vlan']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["vlan"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_bridge_config(self):
-        entry = NETWORK_CONFIGS['bridge']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["bridge"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_manual_config(self):
-        entry = NETWORK_CONFIGS['manual']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["manual"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_all_config(self):
-        entry = NETWORK_CONFIGS['all']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["all"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
         self.assertNotIn(
-            'WARNING: Network config: ignoring eth0.101 device-level mtu',
-            self.logs.getvalue())
+            "WARNING: Network config: ignoring eth0.101 device-level mtu",
+            self.logs.getvalue(),
+        )
 
     def test_small_config(self):
-        entry = NETWORK_CONFIGS['small']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["small"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_v4_and_v6_static_config(self):
-        entry = NETWORK_CONFIGS['v4_and_v6_static']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v4_and_v6_static"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
         expected_msg = (
-            'WARNING: Network config: ignoring iface0 device-level mtu:8999'
-            ' because ipv4 subnet-level mtu:9000 provided.')
+            "WARNING: Network config: ignoring iface0 device-level mtu:8999"
+            " because ipv4 subnet-level mtu:9000 provided."
+        )
         self.assertIn(expected_msg, self.logs.getvalue())
 
     def test_dhcpv6_only_config(self):
-        entry = NETWORK_CONFIGS['dhcpv6_only']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_only"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_simple_render_ipv6_slaac(self):
-        entry = NETWORK_CONFIGS['ipv6_slaac']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["ipv6_slaac"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_dhcpv6_stateless_config(self):
-        entry = NETWORK_CONFIGS['dhcpv6_stateless']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_stateless"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_wakeonlan_disabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_disabled']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_disabled"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_wakeonlan_enabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_enabled']
-        found = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_enabled"]
+        found = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_render_v4_and_v6(self):
-        entry = NETWORK_CONFIGS['v4_and_v6']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v4_and_v6"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
     def test_render_v6_and_v4(self):
-        entry = NETWORK_CONFIGS['v6_and_v4']
-        found = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v6_and_v4"]
+        found = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self._compare_files_to_expected(entry[self.expected_name], found)
         self._assert_headers(found)
 
 
 class TestEniNetRendering(CiTestCase):
-
     @mock.patch("cloudinit.net.util.get_cmdline", return_value="root=myroot")
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_default_generation(self, mock_get_devicelist,
-                                mock_read_sys_net,
-                                mock_sys_dev_path, m_get_cmdline):
+    def test_default_generation(
+        self,
+        mock_get_devicelist,
+        mock_read_sys_net,
+        mock_sys_dev_path,
+        m_get_cmdline,
+    ):
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path)
+        _setup_test(
+            tmp_dir, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+        )
 
         network_cfg = net.generate_fallback_config()
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
 
         renderer = eni.Renderer(
-            {'eni_path': 'interfaces', 'netrules_path': None})
+            {"eni_path": "interfaces", "netrules_path": None}
+        )
         renderer.render_network_state(ns, target=render_dir)
 
-        self.assertTrue(os.path.exists(os.path.join(render_dir,
-                                                    'interfaces')))
-        with open(os.path.join(render_dir, 'interfaces')) as fh:
+        self.assertTrue(os.path.exists(os.path.join(render_dir, "interfaces")))
+        with open(os.path.join(render_dir, "interfaces")) as fh:
             contents = fh.read()
 
         expected = """
@@ -4076,62 +4713,74 @@ auto eth0
 iface eth0 inet dhcp
 """
         self.assertEqual(
-            expected, dir2dict(tmp_dir)['/etc/network/interfaces'])
+            expected, dir2dict(tmp_dir)["/etc/network/interfaces"]
+        )
 
     def test_v2_route_metric_to_eni(self):
         """Network v2 route-metric overrides are preserved in eni output"""
         tmp_dir = self.tmp_dir()
         renderer = eni.Renderer()
-        expected_tmpl = textwrap.dedent("""\
+        expected_tmpl = textwrap.dedent(
+            """\
             auto lo
             iface lo inet loopback
 
             auto eth0
             iface eth0 inet{suffix} dhcp
                 metric 100
-            """)
-        for dhcp_ver in ('dhcp4', 'dhcp6'):
-            suffix = '6' if dhcp_ver == 'dhcp6' else ''
+            """
+        )
+        for dhcp_ver in ("dhcp4", "dhcp6"):
+            suffix = "6" if dhcp_ver == "dhcp6" else ""
             dhcp_cfg = {
                 dhcp_ver: True,
-                '{ver}-overrides'.format(ver=dhcp_ver): {'route-metric': 100}}
-            v2_input = {'version': 2, 'ethernets': {'eth0': dhcp_cfg}}
+                "{ver}-overrides".format(ver=dhcp_ver): {"route-metric": 100},
+            }
+            v2_input = {"version": 2, "ethernets": {"eth0": dhcp_cfg}}
             ns = network_state.parse_net_config_data(v2_input)
             renderer.render_network_state(ns, target=tmp_dir)
             self.assertEqual(
                 expected_tmpl.format(suffix=suffix),
-                dir2dict(tmp_dir)['/etc/network/interfaces'])
+                dir2dict(tmp_dir)["/etc/network/interfaces"],
+            )
 
 
 class TestNetplanNetRendering(CiTestCase):
-
     @mock.patch("cloudinit.net.util.get_cmdline", return_value="root=myroot")
     @mock.patch("cloudinit.net.netplan._clean_default")
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_default_generation(self, mock_get_devicelist,
-                                mock_read_sys_net,
-                                mock_sys_dev_path,
-                                mock_clean_default, m_get_cmdline):
+    def test_default_generation(
+        self,
+        mock_get_devicelist,
+        mock_read_sys_net,
+        mock_sys_dev_path,
+        mock_clean_default,
+        m_get_cmdline,
+    ):
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path)
+        _setup_test(
+            tmp_dir, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+        )
 
         network_cfg = net.generate_fallback_config()
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
 
-        render_target = 'netplan.yaml'
+        render_target = "netplan.yaml"
         renderer = netplan.Renderer(
-            {'netplan_path': render_target, 'postcmds': False})
+            {"netplan_path": render_target, "postcmds": False}
+        )
         renderer.render_network_state(ns, target=render_dir)
 
-        self.assertTrue(os.path.exists(os.path.join(render_dir,
-                                                    render_target)))
+        self.assertTrue(
+            os.path.exists(os.path.join(render_dir, render_target))
+        )
         with open(os.path.join(render_dir, render_target)) as fh:
             contents = fh.read()
             print(contents)
@@ -4151,8 +4800,9 @@ network:
 
 
 class TestNetplanCleanDefault(CiTestCase):
-    snapd_known_path = 'etc/netplan/00-snapd-config.yaml'
-    snapd_known_content = textwrap.dedent("""\
+    snapd_known_path = "etc/netplan/00-snapd-config.yaml"
+    snapd_known_content = textwrap.dedent(
+        """\
         # This is the initial network config.
         # It can be overwritten by cloud-init or console-conf.
         network:
@@ -4166,15 +4816,18 @@ class TestNetplanCleanDefault(CiTestCase):
                     match:
                         name: "eth*"
                     dhcp4: true
-        """)
+        """
+    )
     stub_known = {
-        'run/systemd/network/10-netplan-all-en.network': 'foo-en',
-        'run/systemd/network/10-netplan-all-eth.network': 'foo-eth',
-        'run/systemd/generator/netplan.stamp': 'stamp',
+        "run/systemd/network/10-netplan-all-en.network": "foo-en",
+        "run/systemd/network/10-netplan-all-eth.network": "foo-eth",
+        "run/systemd/generator/netplan.stamp": "stamp",
     }
 
     def test_clean_known_config_cleaned(self):
-        content = {self.snapd_known_path: self.snapd_known_content, }
+        content = {
+            self.snapd_known_path: self.snapd_known_content,
+        }
         content.update(self.stub_known)
         tmpd = self.tmp_dir()
         files = sorted(populate_dir(tmpd, content))
@@ -4183,7 +4836,9 @@ class TestNetplanCleanDefault(CiTestCase):
         self.assertEqual([], found)
 
     def test_clean_unknown_config_not_cleaned(self):
-        content = {self.snapd_known_path: self.snapd_known_content, }
+        content = {
+            self.snapd_known_path: self.snapd_known_content,
+        }
         content.update(self.stub_known)
         content[self.snapd_known_path] += "# user put a comment\n"
         tmpd = self.tmp_dir()
@@ -4214,78 +4869,100 @@ class TestNetplanCleanDefault(CiTestCase):
 
 class TestNetplanPostcommands(CiTestCase):
     mycfg = {
-        'config': [{"type": "physical", "name": "eth0",
-                    "mac_address": "c0:d6:9f:2c:e8:80",
-                    "subnets": [{"type": "dhcp"}]}],
-        'version': 1}
-
-    @mock.patch.object(netplan.Renderer, '_netplan_generate')
-    @mock.patch.object(netplan.Renderer, '_net_setup_link')
-    @mock.patch('cloudinit.subp.subp')
-    def test_netplan_render_calls_postcmds(self, mock_subp,
-                                           mock_netplan_generate,
-                                           mock_net_setup_link):
+        "config": [
+            {
+                "type": "physical",
+                "name": "eth0",
+                "mac_address": "c0:d6:9f:2c:e8:80",
+                "subnets": [{"type": "dhcp"}],
+            }
+        ],
+        "version": 1,
+    }
+
+    @mock.patch.object(netplan.Renderer, "_netplan_generate")
+    @mock.patch.object(netplan.Renderer, "_net_setup_link")
+    @mock.patch("cloudinit.subp.subp")
+    def test_netplan_render_calls_postcmds(
+        self, mock_subp, mock_netplan_generate, mock_net_setup_link
+    ):
         tmp_dir = self.tmp_dir()
-        ns = network_state.parse_net_config_data(self.mycfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(self.mycfg, skip_broken=False)
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
 
-        render_target = 'netplan.yaml'
+        render_target = "netplan.yaml"
         renderer = netplan.Renderer(
-            {'netplan_path': render_target, 'postcmds': True})
+            {"netplan_path": render_target, "postcmds": True}
+        )
         mock_subp.side_effect = iter([subp.ProcessExecutionError])
         renderer.render_network_state(ns, target=render_dir)
 
         mock_netplan_generate.assert_called_with(run=True)
         mock_net_setup_link.assert_called_with(run=True)
 
-    @mock.patch('cloudinit.util.SeLinuxGuard')
+    @mock.patch("cloudinit.util.SeLinuxGuard")
     @mock.patch.object(netplan, "get_devicelist")
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_netplan_postcmds(self, mock_subp, mock_devlist, mock_sel):
         mock_sel.__enter__ = mock.Mock(return_value=False)
         mock_sel.__exit__ = mock.Mock()
-        mock_devlist.side_effect = [['lo']]
+        mock_devlist.side_effect = [["lo"]]
         tmp_dir = self.tmp_dir()
-        ns = network_state.parse_net_config_data(self.mycfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(self.mycfg, skip_broken=False)
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
 
-        render_target = 'netplan.yaml'
+        render_target = "netplan.yaml"
         renderer = netplan.Renderer(
-            {'netplan_path': render_target, 'postcmds': True})
-        mock_subp.side_effect = iter([
-            subp.ProcessExecutionError,
-            ('', ''),
-            ('', ''),
-        ])
+            {"netplan_path": render_target, "postcmds": True}
+        )
+        mock_subp.side_effect = iter(
+            [
+                subp.ProcessExecutionError,
+                ("", ""),
+                ("", ""),
+            ]
+        )
         expected = [
-            mock.call(['netplan', 'info'], capture=True),
-            mock.call(['netplan', 'generate'], capture=True),
-            mock.call(['udevadm', 'test-builtin', 'net_setup_link',
-                       '/sys/class/net/lo'], capture=True),
+            mock.call(["netplan", "info"], capture=True),
+            mock.call(["netplan", "generate"], capture=True),
+            mock.call(
+                [
+                    "udevadm",
+                    "test-builtin",
+                    "net_setup_link",
+                    "/sys/class/net/lo",
+                ],
+                capture=True,
+            ),
         ]
-        with mock.patch.object(os.path, 'islink', return_value=True):
+        with mock.patch.object(os.path, "islink", return_value=True):
             renderer.render_network_state(ns, target=render_dir)
             mock_subp.assert_has_calls(expected)
 
 
 class TestEniNetworkStateToEni(CiTestCase):
     mycfg = {
-        'config': [{"type": "physical", "name": "eth0",
-                    "mac_address": "c0:d6:9f:2c:e8:80",
-                    "subnets": [{"type": "dhcp"}]}],
-        'version': 1}
-    my_mac = 'c0:d6:9f:2c:e8:80'
+        "config": [
+            {
+                "type": "physical",
+                "name": "eth0",
+                "mac_address": "c0:d6:9f:2c:e8:80",
+                "subnets": [{"type": "dhcp"}],
+            }
+        ],
+        "version": 1,
+    }
+    my_mac = "c0:d6:9f:2c:e8:80"
 
     def test_no_header(self):
         rendered = eni.network_state_to_eni(
             network_state=network_state.parse_net_config_data(self.mycfg),
-            render_hwaddress=True)
+            render_hwaddress=True,
+        )
         self.assertIn(self.my_mac, rendered)
         self.assertIn("hwaddress", rendered)
 
@@ -4293,14 +4970,17 @@ class TestEniNetworkStateToEni(CiTestCase):
         header = "# hello world\n"
         rendered = eni.network_state_to_eni(
             network_state=network_state.parse_net_config_data(self.mycfg),
-            header=header, render_hwaddress=True)
+            header=header,
+            render_hwaddress=True,
+        )
         self.assertIn(header, rendered)
         self.assertIn(self.my_mac, rendered)
 
     def test_no_hwaddress(self):
         rendered = eni.network_state_to_eni(
             network_state=network_state.parse_net_config_data(self.mycfg),
-            render_hwaddress=False)
+            render_hwaddress=False,
+        )
         self.assertNotIn(self.my_mac, rendered)
         self.assertNotIn("hwaddress", rendered)
 
@@ -4309,189 +4989,218 @@ class TestCmdlineConfigParsing(CiTestCase):
     with_logs = True
 
     simple_cfg = {
-        'config': [{"type": "physical", "name": "eth0",
-                    "mac_address": "c0:d6:9f:2c:e8:80",
-                    "subnets": [{"type": "dhcp"}]}]}
+        "config": [
+            {
+                "type": "physical",
+                "name": "eth0",
+                "mac_address": "c0:d6:9f:2c:e8:80",
+                "subnets": [{"type": "dhcp"}],
+            }
+        ]
+    }
 
     def test_cmdline_convert_dhcp(self):
         found = cmdline._klibc_to_config_entry(DHCP_CONTENT_1)
-        self.assertEqual(found, ('eth0', DHCP_EXPECTED_1))
+        self.assertEqual(found, ("eth0", DHCP_EXPECTED_1))
 
     def test_cmdline_convert_dhcp6(self):
         found = cmdline._klibc_to_config_entry(DHCP6_CONTENT_1)
-        self.assertEqual(found, ('eno1', DHCP6_EXPECTED_1))
+        self.assertEqual(found, ("eno1", DHCP6_EXPECTED_1))
 
     def test_cmdline_convert_static(self):
         found = cmdline._klibc_to_config_entry(STATIC_CONTENT_1)
-        self.assertEqual(found, ('eth1', STATIC_EXPECTED_1))
+        self.assertEqual(found, ("eth1", STATIC_EXPECTED_1))
 
     def test_config_from_cmdline_net_cfg(self):
         files = []
-        pairs = (('net-eth0.cfg', DHCP_CONTENT_1),
-                 ('net-eth1.cfg', STATIC_CONTENT_1))
+        pairs = (
+            ("net-eth0.cfg", DHCP_CONTENT_1),
+            ("net-eth1.cfg", STATIC_CONTENT_1),
+        )
 
-        macs = {'eth1': 'b8:ae:ed:75:ff:2b',
-                'eth0': 'b8:ae:ed:75:ff:2a'}
+        macs = {"eth1": "b8:ae:ed:75:ff:2b", "eth0": "b8:ae:ed:75:ff:2a"}
 
         dhcp = copy.deepcopy(DHCP_EXPECTED_1)
-        dhcp['mac_address'] = macs['eth0']
+        dhcp["mac_address"] = macs["eth0"]
 
         static = copy.deepcopy(STATIC_EXPECTED_1)
-        static['mac_address'] = macs['eth1']
+        static["mac_address"] = macs["eth1"]
 
-        expected = {'version': 1, 'config': [dhcp, static]}
+        expected = {"version": 1, "config": [dhcp, static]}
         with temp_utils.tempdir() as tmpd:
             for fname, content in pairs:
                 fp = os.path.join(tmpd, fname)
                 files.append(fp)
                 util.write_file(fp, content)
 
-            found = cmdline.config_from_klibc_net_cfg(files=files,
-                                                      mac_addrs=macs)
+            found = cmdline.config_from_klibc_net_cfg(
+                files=files, mac_addrs=macs
+            )
             self.assertEqual(found, expected)
 
     def test_cmdline_with_b64(self):
         data = base64.b64encode(json.dumps(self.simple_cfg).encode())
         encoded_text = data.decode()
-        raw_cmdline = 'ro network-config=' + encoded_text + ' root=foo'
+        raw_cmdline = "ro network-config=" + encoded_text + " root=foo"
         found = cmdline.read_kernel_cmdline_config(cmdline=raw_cmdline)
         self.assertEqual(found, self.simple_cfg)
 
     def test_cmdline_with_net_config_disabled(self):
-        raw_cmdline = 'ro network-config=disabled root=foo'
+        raw_cmdline = "ro network-config=disabled root=foo"
         found = cmdline.read_kernel_cmdline_config(cmdline=raw_cmdline)
-        self.assertEqual(found, {'config': 'disabled'})
+        self.assertEqual(found, {"config": "disabled"})
 
     def test_cmdline_with_net_config_unencoded_logs_error(self):
         """network-config cannot be unencoded besides 'disabled'."""
-        raw_cmdline = 'ro network-config={config:disabled} root=foo'
+        raw_cmdline = "ro network-config={config:disabled} root=foo"
         found = cmdline.read_kernel_cmdline_config(cmdline=raw_cmdline)
         self.assertIsNone(found)
         expected_log = (
-            'ERROR: Expected base64 encoded kernel commandline parameter'
-            ' network-config. Ignoring network-config={config:disabled}.')
+            "ERROR: Expected base64 encoded kernel commandline parameter"
+            " network-config. Ignoring network-config={config:disabled}."
+        )
         self.assertIn(expected_log, self.logs.getvalue())
 
     def test_cmdline_with_b64_gz(self):
         data = _gzip_data(json.dumps(self.simple_cfg).encode())
         encoded_text = base64.b64encode(data).decode()
-        raw_cmdline = 'ro network-config=' + encoded_text + ' root=foo'
+        raw_cmdline = "ro network-config=" + encoded_text + " root=foo"
         found = cmdline.read_kernel_cmdline_config(cmdline=raw_cmdline)
         self.assertEqual(found, self.simple_cfg)
 
 
 class TestCmdlineKlibcNetworkConfigSource(FilesystemMockingTestCase):
     macs = {
-        'eth0': '14:02:ec:42:48:00',
-        'eno1': '14:02:ec:42:48:01',
+        "eth0": "14:02:ec:42:48:00",
+        "eno1": "14:02:ec:42:48:01",
     }
 
     def test_without_ip(self):
-        content = {'/run/net-eth0.conf': DHCP_CONTENT_1,
-                   cmdline._OPEN_ISCSI_INTERFACE_FILE: "eth0\n"}
+        content = {
+            "/run/net-eth0.conf": DHCP_CONTENT_1,
+            cmdline._OPEN_ISCSI_INTERFACE_FILE: "eth0\n",
+        }
         exp1 = copy.deepcopy(DHCP_EXPECTED_1)
-        exp1['mac_address'] = self.macs['eth0']
+        exp1["mac_address"] = self.macs["eth0"]
 
         root = self.tmp_dir()
         populate_dir(root, content)
         self.reRoot(root)
 
         src = cmdline.KlibcNetworkConfigSource(
-            _cmdline='foo root=/root/bar', _mac_addrs=self.macs,
+            _cmdline="foo root=/root/bar",
+            _mac_addrs=self.macs,
         )
         self.assertTrue(src.is_applicable())
         found = src.render_config()
-        self.assertEqual(found['version'], 1)
-        self.assertEqual(found['config'], [exp1])
+        self.assertEqual(found["version"], 1)
+        self.assertEqual(found["config"], [exp1])
 
     def test_with_ip(self):
-        content = {'/run/net-eth0.conf': DHCP_CONTENT_1}
+        content = {"/run/net-eth0.conf": DHCP_CONTENT_1}
         exp1 = copy.deepcopy(DHCP_EXPECTED_1)
-        exp1['mac_address'] = self.macs['eth0']
+        exp1["mac_address"] = self.macs["eth0"]
 
         root = self.tmp_dir()
         populate_dir(root, content)
         self.reRoot(root)
 
         src = cmdline.KlibcNetworkConfigSource(
-            _cmdline='foo ip=dhcp', _mac_addrs=self.macs,
+            _cmdline="foo ip=dhcp",
+            _mac_addrs=self.macs,
         )
         self.assertTrue(src.is_applicable())
         found = src.render_config()
-        self.assertEqual(found['version'], 1)
-        self.assertEqual(found['config'], [exp1])
+        self.assertEqual(found["version"], 1)
+        self.assertEqual(found["config"], [exp1])
 
     def test_with_ip6(self):
-        content = {'/run/net6-eno1.conf': DHCP6_CONTENT_1}
+        content = {"/run/net6-eno1.conf": DHCP6_CONTENT_1}
         root = self.tmp_dir()
         populate_dir(root, content)
         self.reRoot(root)
 
         src = cmdline.KlibcNetworkConfigSource(
-            _cmdline='foo ip6=dhcp root=/dev/sda', _mac_addrs=self.macs,
+            _cmdline="foo ip6=dhcp root=/dev/sda",
+            _mac_addrs=self.macs,
         )
         self.assertTrue(src.is_applicable())
         found = src.render_config()
         self.assertEqual(
             found,
-            {'version': 1, 'config': [
-             {'type': 'physical', 'name': 'eno1',
-              'mac_address': self.macs['eno1'],
-              'subnets': [
-                  {'dns_nameservers': ['2001:67c:1562:8010::2:1'],
-                   'control': 'manual', 'type': 'dhcp6', 'netmask': '64'}]}]})
+            {
+                "version": 1,
+                "config": [
+                    {
+                        "type": "physical",
+                        "name": "eno1",
+                        "mac_address": self.macs["eno1"],
+                        "subnets": [
+                            {
+                                "dns_nameservers": ["2001:67c:1562:8010::2:1"],
+                                "control": "manual",
+                                "type": "dhcp6",
+                                "netmask": "64",
+                            }
+                        ],
+                    }
+                ],
+            },
+        )
 
     def test_with_no_ip_or_ip6(self):
         # if there is no ip= or ip6= on cmdline, return value should be None
-        content = {'net6-eno1.conf': DHCP6_CONTENT_1}
+        content = {"net6-eno1.conf": DHCP6_CONTENT_1}
         files = sorted(populate_dir(self.tmp_dir(), content))
         src = cmdline.KlibcNetworkConfigSource(
-            _files=files, _cmdline='foo root=/dev/sda', _mac_addrs=self.macs,
+            _files=files,
+            _cmdline="foo root=/dev/sda",
+            _mac_addrs=self.macs,
         )
         self.assertFalse(src.is_applicable())
 
     def test_with_faux_ip(self):
-        content = {'net6-eno1.conf': DHCP6_CONTENT_1}
+        content = {"net6-eno1.conf": DHCP6_CONTENT_1}
         files = sorted(populate_dir(self.tmp_dir(), content))
         src = cmdline.KlibcNetworkConfigSource(
             _files=files,
-            _cmdline='foo iscsi_target_ip=root=/dev/sda',
+            _cmdline="foo iscsi_target_ip=root=/dev/sda",
             _mac_addrs=self.macs,
         )
         self.assertFalse(src.is_applicable())
 
     def test_empty_cmdline(self):
-        content = {'net6-eno1.conf': DHCP6_CONTENT_1}
+        content = {"net6-eno1.conf": DHCP6_CONTENT_1}
         files = sorted(populate_dir(self.tmp_dir(), content))
         src = cmdline.KlibcNetworkConfigSource(
             _files=files,
-            _cmdline='',
+            _cmdline="",
             _mac_addrs=self.macs,
         )
         self.assertFalse(src.is_applicable())
 
     def test_whitespace_cmdline(self):
-        content = {'net6-eno1.conf': DHCP6_CONTENT_1}
+        content = {"net6-eno1.conf": DHCP6_CONTENT_1}
         files = sorted(populate_dir(self.tmp_dir(), content))
         src = cmdline.KlibcNetworkConfigSource(
             _files=files,
-            _cmdline='          ',
+            _cmdline="          ",
             _mac_addrs=self.macs,
         )
         self.assertFalse(src.is_applicable())
 
     def test_cmdline_no_lhand(self):
-        content = {'net6-eno1.conf': DHCP6_CONTENT_1}
+        content = {"net6-eno1.conf": DHCP6_CONTENT_1}
         files = sorted(populate_dir(self.tmp_dir(), content))
         src = cmdline.KlibcNetworkConfigSource(
             _files=files,
-            _cmdline='=wut',
+            _cmdline="=wut",
             _mac_addrs=self.macs,
         )
         self.assertFalse(src.is_applicable())
 
     def test_cmdline_embedded_ip(self):
-        content = {'net6-eno1.conf': DHCP6_CONTENT_1}
+        content = {"net6-eno1.conf": DHCP6_CONTENT_1}
         files = sorted(populate_dir(self.tmp_dir(), content))
         src = cmdline.KlibcNetworkConfigSource(
             _files=files,
@@ -4502,13 +5211,19 @@ class TestCmdlineKlibcNetworkConfigSource(FilesystemMockingTestCase):
 
     def test_with_both_ip_ip6(self):
         content = {
-            '/run/net-eth0.conf': DHCP_CONTENT_1,
-            '/run/net6-eth0.conf': DHCP6_CONTENT_1.replace('eno1', 'eth0')}
+            "/run/net-eth0.conf": DHCP_CONTENT_1,
+            "/run/net6-eth0.conf": DHCP6_CONTENT_1.replace("eno1", "eth0"),
+        }
         eth0 = copy.deepcopy(DHCP_EXPECTED_1)
-        eth0['mac_address'] = self.macs['eth0']
-        eth0['subnets'].append(
-            {'control': 'manual', 'type': 'dhcp6',
-             'netmask': '64', 'dns_nameservers': ['2001:67c:1562:8010::2:1']})
+        eth0["mac_address"] = self.macs["eth0"]
+        eth0["subnets"].append(
+            {
+                "control": "manual",
+                "type": "dhcp6",
+                "netmask": "64",
+                "dns_nameservers": ["2001:67c:1562:8010::2:1"],
+            }
+        )
         expected = [eth0]
 
         root = self.tmp_dir()
@@ -4516,17 +5231,17 @@ class TestCmdlineKlibcNetworkConfigSource(FilesystemMockingTestCase):
         self.reRoot(root)
 
         src = cmdline.KlibcNetworkConfigSource(
-            _cmdline='foo ip=dhcp ip6=dhcp', _mac_addrs=self.macs,
+            _cmdline="foo ip=dhcp ip6=dhcp",
+            _mac_addrs=self.macs,
         )
 
         self.assertTrue(src.is_applicable())
         found = src.render_config()
-        self.assertEqual(found['version'], 1)
-        self.assertEqual(found['config'], expected)
+        self.assertEqual(found["version"], 1)
+        self.assertEqual(found["config"], expected)
 
 
 class TestReadInitramfsConfig(CiTestCase):
-
     def _config_source_cls_mock(self, is_applicable, render_config=None):
         return lambda: mock.Mock(
             is_applicable=lambda: is_applicable,
@@ -4534,7 +5249,7 @@ class TestReadInitramfsConfig(CiTestCase):
         )
 
     def test_no_sources(self):
-        with mock.patch('cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES', []):
+        with mock.patch("cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES", []):
             self.assertIsNone(cmdline.read_initramfs_config())
 
     def test_no_applicable_sources(self):
@@ -4543,19 +5258,22 @@ class TestReadInitramfsConfig(CiTestCase):
             self._config_source_cls_mock(is_applicable=False),
             self._config_source_cls_mock(is_applicable=False),
         ]
-        with mock.patch('cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES',
-                        sources):
+        with mock.patch(
+            "cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES", sources
+        ):
             self.assertIsNone(cmdline.read_initramfs_config())
 
     def test_one_applicable_source(self):
         expected_config = object()
         sources = [
             self._config_source_cls_mock(
-                is_applicable=True, render_config=expected_config,
+                is_applicable=True,
+                render_config=expected_config,
             ),
         ]
-        with mock.patch('cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES',
-                        sources):
+        with mock.patch(
+            "cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES", sources
+        ):
             self.assertEqual(expected_config, cmdline.read_initramfs_config())
 
     def test_one_applicable_source_after_inapplicable_sources(self):
@@ -4564,45 +5282,53 @@ class TestReadInitramfsConfig(CiTestCase):
             self._config_source_cls_mock(is_applicable=False),
             self._config_source_cls_mock(is_applicable=False),
             self._config_source_cls_mock(
-                is_applicable=True, render_config=expected_config,
+                is_applicable=True,
+                render_config=expected_config,
             ),
         ]
-        with mock.patch('cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES',
-                        sources):
+        with mock.patch(
+            "cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES", sources
+        ):
             self.assertEqual(expected_config, cmdline.read_initramfs_config())
 
     def test_first_applicable_source_is_used(self):
         first_config, second_config = object(), object()
         sources = [
             self._config_source_cls_mock(
-                is_applicable=True, render_config=first_config,
+                is_applicable=True,
+                render_config=first_config,
             ),
             self._config_source_cls_mock(
-                is_applicable=True, render_config=second_config,
+                is_applicable=True,
+                render_config=second_config,
             ),
         ]
-        with mock.patch('cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES',
-                        sources):
+        with mock.patch(
+            "cloudinit.net.cmdline._INITRAMFS_CONFIG_SOURCES", sources
+        ):
             self.assertEqual(first_config, cmdline.read_initramfs_config())
 
 
 class TestNetplanRoundTrip(CiTestCase):
 
-    NETPLAN_INFO_OUT = textwrap.dedent("""
+    NETPLAN_INFO_OUT = textwrap.dedent(
+        """
     netplan.io:
       features:
         - dhcp-use-domains
         - ipv6-mtu
       website: https://netplan.io/
-    """)
+    """
+    )
 
     def setUp(self):
         super(TestNetplanRoundTrip, self).setUp()
-        self.add_patch('cloudinit.net.netplan.subp.subp', 'm_subp')
-        self.m_subp.return_value = (self.NETPLAN_INFO_OUT, '')
+        self.add_patch("cloudinit.net.netplan.subp.subp", "m_subp")
+        self.m_subp.return_value = (self.NETPLAN_INFO_OUT, "")
 
-    def _render_and_read(self, network_config=None, state=None,
-                         netplan_path=None, target=None):
+    def _render_and_read(
+        self, network_config=None, state=None, netplan_path=None, target=None
+    ):
         if target is None:
             target = self.tmp_dir()
 
@@ -4614,188 +5340,212 @@ class TestNetplanRoundTrip(CiTestCase):
             raise ValueError("Expected data or state, got neither")
 
         if netplan_path is None:
-            netplan_path = 'etc/netplan/50-cloud-init.yaml'
+            netplan_path = "etc/netplan/50-cloud-init.yaml"
 
-        renderer = netplan.Renderer(
-            config={'netplan_path': netplan_path})
+        renderer = netplan.Renderer(config={"netplan_path": netplan_path})
 
         renderer.render_network_state(ns, target=target)
         return dir2dict(target)
 
     def testsimple_render_bond_netplan(self):
-        entry = NETWORK_CONFIGS['bond']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
-        print(entry['expected_netplan'])
-        print('-- expected ^ | v rendered --')
-        print(files['/etc/netplan/50-cloud-init.yaml'])
+        entry = NETWORK_CONFIGS["bond"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
+        print(entry["expected_netplan"])
+        print("-- expected ^ | v rendered --")
+        print(files["/etc/netplan/50-cloud-init.yaml"])
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_bond_v2_input_netplan(self):
-        entry = NETWORK_CONFIGS['bond']
+        entry = NETWORK_CONFIGS["bond"]
         files = self._render_and_read(
-            network_config=yaml.load(entry['yaml-v2']))
-        print(entry['expected_netplan-v2'])
-        print('-- expected ^ | v rendered --')
-        print(files['/etc/netplan/50-cloud-init.yaml'])
+            network_config=yaml.load(entry["yaml-v2"])
+        )
+        print(entry["expected_netplan-v2"])
+        print("-- expected ^ | v rendered --")
+        print(files["/etc/netplan/50-cloud-init.yaml"])
         self.assertEqual(
-            entry['expected_netplan-v2'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan-v2"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_small_netplan(self):
-        entry = NETWORK_CONFIGS['small']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["small"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_v4_and_v6(self):
-        entry = NETWORK_CONFIGS['v4_and_v6']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v4_and_v6"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_v4_and_v6_static(self):
-        entry = NETWORK_CONFIGS['v4_and_v6_static']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v4_and_v6_static"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_only(self):
-        entry = NETWORK_CONFIGS['dhcpv6_only']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_only"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_accept_ra(self):
-        entry = NETWORK_CONFIGS['dhcpv6_accept_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        entry = NETWORK_CONFIGS["dhcpv6_accept_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_reject_ra(self):
-        entry = NETWORK_CONFIGS['dhcpv6_reject_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        entry = NETWORK_CONFIGS["dhcpv6_reject_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_ipv6_slaac(self):
-        entry = NETWORK_CONFIGS['ipv6_slaac']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml']))
+        entry = NETWORK_CONFIGS["ipv6_slaac"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_stateless(self):
-        entry = NETWORK_CONFIGS['dhcpv6_stateless']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_stateless"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_stateful(self):
-        entry = NETWORK_CONFIGS['dhcpv6_stateful']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_stateful"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_wakeonlan_disabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_disabled']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_disabled"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_wakeonlan_enabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_enabled']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_enabled"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_all(self):
-        entry = NETWORK_CONFIGS['all']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
-        print(entry['expected_netplan'])
-        print('-- expected ^ | v rendered --')
-        print(files['/etc/netplan/50-cloud-init.yaml'])
+        entry = NETWORK_CONFIGS["all"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
+        print(entry["expected_netplan"])
+        print("-- expected ^ | v rendered --")
+        print(files["/etc/netplan/50-cloud-init.yaml"])
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def testsimple_render_manual(self):
-        entry = NETWORK_CONFIGS['manual']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["manual"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def test_render_output_has_yaml_no_aliases(self):
         entry = {
-            'yaml': V1_NAMESERVER_ALIAS,
-            'expected_netplan': NETPLAN_NO_ALIAS,
+            "yaml": V1_NAMESERVER_ALIAS,
+            "expected_netplan": NETPLAN_NO_ALIAS,
         }
-        network_config = yaml.load(entry['yaml'])
+        network_config = yaml.load(entry["yaml"])
         ns = network_state.parse_net_config_data(network_config)
         files = self._render_and_read(state=ns)
         # check for alias
-        content = files['/etc/netplan/50-cloud-init.yaml']
+        content = files["/etc/netplan/50-cloud-init.yaml"]
 
         # test load the yaml to ensure we don't render something not loadable
         # this allows single aliases, but not duplicate ones
-        parsed = yaml.load(files['/etc/netplan/50-cloud-init.yaml'])
+        parsed = yaml.load(files["/etc/netplan/50-cloud-init.yaml"])
         self.assertNotEqual(None, parsed)
 
         # now look for any alias, avoid rendering them entirely
         # generate the first anchor string using the template
         # as of this writing, looks like "&id001"
-        anchor = r'&' + Serializer.ANCHOR_TEMPLATE % 1
+        anchor = r"&" + Serializer.ANCHOR_TEMPLATE % 1
         found_alias = re.search(anchor, content, re.MULTILINE)
         if found_alias:
             msg = "Error at: %s\nContent:\n%s" % (found_alias, content)
-            raise ValueError('Found yaml alias in rendered netplan: ' + msg)
+            raise ValueError("Found yaml alias in rendered netplan: " + msg)
 
-        print(entry['expected_netplan'])
-        print('-- expected ^ | v rendered --')
-        print(files['/etc/netplan/50-cloud-init.yaml'])
+        print(entry["expected_netplan"])
+        print("-- expected ^ | v rendered --")
+        print(files["/etc/netplan/50-cloud-init.yaml"])
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
     def test_render_output_supports_both_grat_arp_spelling(self):
         entry = {
-            'yaml': NETPLAN_BOND_GRAT_ARP,
-            'expected_netplan': NETPLAN_BOND_GRAT_ARP.replace('gratuitous',
-                                                              'gratuitious'),
+            "yaml": NETPLAN_BOND_GRAT_ARP,
+            "expected_netplan": NETPLAN_BOND_GRAT_ARP.replace(
+                "gratuitous", "gratuitious"
+            ),
         }
-        network_config = yaml.load(entry['yaml']).get('network')
+        network_config = yaml.load(entry["yaml"]).get("network")
         files = self._render_and_read(network_config=network_config)
-        print(entry['expected_netplan'])
-        print('-- expected ^ | v rendered --')
-        print(files['/etc/netplan/50-cloud-init.yaml'])
+        print(entry["expected_netplan"])
+        print("-- expected ^ | v rendered --")
+        print(files["/etc/netplan/50-cloud-init.yaml"])
         self.assertEqual(
-            entry['expected_netplan'].splitlines(),
-            files['/etc/netplan/50-cloud-init.yaml'].splitlines())
+            entry["expected_netplan"].splitlines(),
+            files["/etc/netplan/50-cloud-init.yaml"].splitlines(),
+        )
 
 
 class TestEniRoundTrip(CiTestCase):
-
-    def _render_and_read(self, network_config=None, state=None, eni_path=None,
-                         netrules_path=None, dir=None):
+    def _render_and_read(
+        self,
+        network_config=None,
+        state=None,
+        eni_path=None,
+        netrules_path=None,
+        dir=None,
+    ):
         if dir is None:
             dir = self.tmp_dir()
 
@@ -4807,10 +5557,11 @@ class TestEniRoundTrip(CiTestCase):
             raise ValueError("Expected data or state, got neither")
 
         if eni_path is None:
-            eni_path = 'etc/network/interfaces'
+            eni_path = "etc/network/interfaces"
 
         renderer = eni.Renderer(
-            config={'eni_path': eni_path, 'netrules_path': netrules_path})
+            config={"eni_path": eni_path, "netrules_path": netrules_path}
+        )
 
         renderer.render_network_state(ns, target=dir)
         return dir2dict(dir)
@@ -4820,95 +5571,112 @@ class TestEniRoundTrip(CiTestCase):
         files = self._render_and_read(network_config=network_config)
         self.assertEqual(
             RENDERED_ENI.splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_all(self):
-        entry = NETWORK_CONFIGS['all']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["all"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_small(self):
-        entry = NETWORK_CONFIGS['small']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["small"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_v4_and_v6(self):
-        entry = NETWORK_CONFIGS['v4_and_v6']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v4_and_v6"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_only(self):
-        entry = NETWORK_CONFIGS['dhcpv6_only']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_only"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_v4_and_v6_static(self):
-        entry = NETWORK_CONFIGS['v4_and_v6_static']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["v4_and_v6_static"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_stateless(self):
-        entry = NETWORK_CONFIGS['dhcpv6_stateless']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_stateless"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_ipv6_slaac(self):
-        entry = NETWORK_CONFIGS['ipv6_slaac']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["ipv6_slaac"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_stateful(self):
-        entry = NETWORK_CONFIGS['dhcpv6_stateless']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["dhcpv6_stateless"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_accept_ra(self):
-        entry = NETWORK_CONFIGS['dhcpv6_accept_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        entry = NETWORK_CONFIGS["dhcpv6_accept_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_dhcpv6_reject_ra(self):
-        entry = NETWORK_CONFIGS['dhcpv6_reject_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        entry = NETWORK_CONFIGS["dhcpv6_reject_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_wakeonlan_disabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_disabled']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_disabled"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_wakeonlan_enabled_config_v2(self):
-        entry = NETWORK_CONFIGS['wakeonlan_enabled']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        entry = NETWORK_CONFIGS["wakeonlan_enabled"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def testsimple_render_manual(self):
         """Test rendering of 'manual' for 'type' and 'control'.
@@ -4918,145 +5686,179 @@ class TestEniRoundTrip(CiTestCase):
         if there were no addresses to configure.  Also strange is the fact
         that in order to apply that MTU the ifupdown device must be set
         to 'auto', or the MTU would not be set."""
-        entry = NETWORK_CONFIGS['manual']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["manual"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
     def test_routes_rendered(self):
         # as reported in bug 1649652
         conf = [
-            {'name': 'eth0', 'type': 'physical',
-             'subnets': [{
-                 'address': '172.23.31.42/26',
-                 'dns_nameservers': [], 'gateway': '172.23.31.2',
-                 'type': 'static'}]},
-            {'type': 'route', 'id': 4,
-             'metric': 0, 'destination': '10.0.0.0/12',
-             'gateway': '172.23.31.1'},
-            {'type': 'route', 'id': 5,
-             'metric': 0, 'destination': '192.168.2.0/16',
-             'gateway': '172.23.31.1'},
-            {'type': 'route', 'id': 6,
-             'metric': 1, 'destination': '10.0.200.0/16',
-             'gateway': '172.23.31.1'},
-            {'type': 'route', 'id': 7,
-             'metric': 1, 'destination': '10.0.0.100/32',
-             'gateway': '172.23.31.1'},
+            {
+                "name": "eth0",
+                "type": "physical",
+                "subnets": [
+                    {
+                        "address": "172.23.31.42/26",
+                        "dns_nameservers": [],
+                        "gateway": "172.23.31.2",
+                        "type": "static",
+                    }
+                ],
+            },
+            {
+                "type": "route",
+                "id": 4,
+                "metric": 0,
+                "destination": "10.0.0.0/12",
+                "gateway": "172.23.31.1",
+            },
+            {
+                "type": "route",
+                "id": 5,
+                "metric": 0,
+                "destination": "192.168.2.0/16",
+                "gateway": "172.23.31.1",
+            },
+            {
+                "type": "route",
+                "id": 6,
+                "metric": 1,
+                "destination": "10.0.200.0/16",
+                "gateway": "172.23.31.1",
+            },
+            {
+                "type": "route",
+                "id": 7,
+                "metric": 1,
+                "destination": "10.0.0.100/32",
+                "gateway": "172.23.31.1",
+            },
         ]
 
         files = self._render_and_read(
-            network_config={'config': conf, 'version': 1})
+            network_config={"config": conf, "version": 1}
+        )
         expected = [
-            'auto lo',
-            'iface lo inet loopback',
-            'auto eth0',
-            'iface eth0 inet static',
-            '    address 172.23.31.42/26',
-            '    gateway 172.23.31.2',
-            ('post-up route add -net 10.0.0.0/12 gw '
-             '172.23.31.1 metric 0 || true'),
-            ('pre-down route del -net 10.0.0.0/12 gw '
-             '172.23.31.1 metric 0 || true'),
-            ('post-up route add -net 192.168.2.0/16 gw '
-             '172.23.31.1 metric 0 || true'),
-            ('pre-down route del -net 192.168.2.0/16 gw '
-             '172.23.31.1 metric 0 || true'),
-            ('post-up route add -net 10.0.200.0/16 gw '
-             '172.23.31.1 metric 1 || true'),
-            ('pre-down route del -net 10.0.200.0/16 gw '
-             '172.23.31.1 metric 1 || true'),
-            ('post-up route add -host 10.0.0.100/32 gw '
-             '172.23.31.1 metric 1 || true'),
-            ('pre-down route del -host 10.0.0.100/32 gw '
-             '172.23.31.1 metric 1 || true'),
+            "auto lo",
+            "iface lo inet loopback",
+            "auto eth0",
+            "iface eth0 inet static",
+            "    address 172.23.31.42/26",
+            "    gateway 172.23.31.2",
+            "post-up route add -net 10.0.0.0/12 gw "
+            "172.23.31.1 metric 0 || true",
+            "pre-down route del -net 10.0.0.0/12 gw "
+            "172.23.31.1 metric 0 || true",
+            "post-up route add -net 192.168.2.0/16 gw "
+            "172.23.31.1 metric 0 || true",
+            "pre-down route del -net 192.168.2.0/16 gw "
+            "172.23.31.1 metric 0 || true",
+            "post-up route add -net 10.0.200.0/16 gw "
+            "172.23.31.1 metric 1 || true",
+            "pre-down route del -net 10.0.200.0/16 gw "
+            "172.23.31.1 metric 1 || true",
+            "post-up route add -host 10.0.0.100/32 gw "
+            "172.23.31.1 metric 1 || true",
+            "pre-down route del -host 10.0.0.100/32 gw "
+            "172.23.31.1 metric 1 || true",
         ]
-        found = files['/etc/network/interfaces'].splitlines()
+        found = files["/etc/network/interfaces"].splitlines()
 
-        self.assertEqual(
-            expected, [line for line in found if line])
+        self.assertEqual(expected, [line for line in found if line])
 
     def test_ipv6_static_routes(self):
         # as reported in bug 1818669
         conf = [
-            {'name': 'eno3', 'type': 'physical',
-             'subnets': [{
-                 'address': 'fd00::12/64',
-                 'dns_nameservers': ['fd00:2::15'],
-                 'gateway': 'fd00::1',
-                 'ipv6': True,
-                 'type': 'static',
-                 'routes': [{'netmask': '32',
-                             'network': 'fd00:12::',
-                             'gateway': 'fd00::2'},
-                            {'network': 'fd00:14::',
-                             'gateway': 'fd00::3'},
-                            {'destination': 'fe00:14::/48',
-                             'gateway': 'fe00::4',
-                             'metric': 500},
-                            {'gateway': '192.168.23.1',
-                             'metric': 999,
-                             'netmask': 24,
-                             'network': '192.168.23.0'},
-                            {'destination': '10.23.23.0/24',
-                             'gateway': '10.23.23.2',
-                             'metric': 300}]}]},
+            {
+                "name": "eno3",
+                "type": "physical",
+                "subnets": [
+                    {
+                        "address": "fd00::12/64",
+                        "dns_nameservers": ["fd00:2::15"],
+                        "gateway": "fd00::1",
+                        "ipv6": True,
+                        "type": "static",
+                        "routes": [
+                            {
+                                "netmask": "32",
+                                "network": "fd00:12::",
+                                "gateway": "fd00::2",
+                            },
+                            {"network": "fd00:14::", "gateway": "fd00::3"},
+                            {
+                                "destination": "fe00:14::/48",
+                                "gateway": "fe00::4",
+                                "metric": 500,
+                            },
+                            {
+                                "gateway": "192.168.23.1",
+                                "metric": 999,
+                                "netmask": 24,
+                                "network": "192.168.23.0",
+                            },
+                            {
+                                "destination": "10.23.23.0/24",
+                                "gateway": "10.23.23.2",
+                                "metric": 300,
+                            },
+                        ],
+                    }
+                ],
+            },
         ]
 
         files = self._render_and_read(
-            network_config={'config': conf, 'version': 1})
+            network_config={"config": conf, "version": 1}
+        )
         expected = [
-            'auto lo',
-            'iface lo inet loopback',
-            'auto eno3',
-            'iface eno3 inet6 static',
-            '    address fd00::12/64',
-            '    dns-nameservers fd00:2::15',
-            '    gateway fd00::1',
-            ('    post-up route add -A inet6 fd00:12::/32 gw '
-             'fd00::2 || true'),
-            ('    pre-down route del -A inet6 fd00:12::/32 gw '
-             'fd00::2 || true'),
-            ('    post-up route add -A inet6 fd00:14::/64 gw '
-             'fd00::3 || true'),
-            ('    pre-down route del -A inet6 fd00:14::/64 gw '
-             'fd00::3 || true'),
-            ('    post-up route add -A inet6 fe00:14::/48 gw '
-             'fe00::4 metric 500 || true'),
-            ('    pre-down route del -A inet6 fe00:14::/48 gw '
-             'fe00::4 metric 500 || true'),
-            ('    post-up route add -net 192.168.23.0/24 gw '
-             '192.168.23.1 metric 999 || true'),
-            ('    pre-down route del -net 192.168.23.0/24 gw '
-             '192.168.23.1 metric 999 || true'),
-            ('    post-up route add -net 10.23.23.0/24 gw '
-             '10.23.23.2 metric 300 || true'),
-            ('    pre-down route del -net 10.23.23.0/24 gw '
-             '10.23.23.2 metric 300 || true'),
-
+            "auto lo",
+            "iface lo inet loopback",
+            "auto eno3",
+            "iface eno3 inet6 static",
+            "    address fd00::12/64",
+            "    dns-nameservers fd00:2::15",
+            "    gateway fd00::1",
+            "    post-up route add -A inet6 fd00:12::/32 gw fd00::2 || true",
+            "    pre-down route del -A inet6 fd00:12::/32 gw fd00::2 || true",
+            "    post-up route add -A inet6 fd00:14::/64 gw fd00::3 || true",
+            "    pre-down route del -A inet6 fd00:14::/64 gw fd00::3 || true",
+            "    post-up route add -A inet6 fe00:14::/48 gw "
+            "fe00::4 metric 500 || true",
+            "    pre-down route del -A inet6 fe00:14::/48 gw "
+            "fe00::4 metric 500 || true",
+            "    post-up route add -net 192.168.23.0/24 gw "
+            "192.168.23.1 metric 999 || true",
+            "    pre-down route del -net 192.168.23.0/24 gw "
+            "192.168.23.1 metric 999 || true",
+            "    post-up route add -net 10.23.23.0/24 gw "
+            "10.23.23.2 metric 300 || true",
+            "    pre-down route del -net 10.23.23.0/24 gw "
+            "10.23.23.2 metric 300 || true",
         ]
-        found = files['/etc/network/interfaces'].splitlines()
+        found = files["/etc/network/interfaces"].splitlines()
 
-        self.assertEqual(
-            expected, [line for line in found if line])
+        self.assertEqual(expected, [line for line in found if line])
 
     def testsimple_render_bond(self):
-        entry = NETWORK_CONFIGS['bond']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        entry = NETWORK_CONFIGS["bond"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
         self.assertEqual(
-            entry['expected_eni'].splitlines(),
-            files['/etc/network/interfaces'].splitlines())
+            entry["expected_eni"].splitlines(),
+            files["/etc/network/interfaces"].splitlines(),
+        )
 
 
 class TestNetworkdNetRendering(CiTestCase):
-
     def create_conf_dict(self, contents):
         content_dict = {}
         for line in contents:
             if line:
                 line = line.strip()
-                if line and re.search(r'^\[(.+)\]$', line):
+                if line and re.search(r"^\[(.+)\]$", line):
                     content_dict[line] = []
                     key = line
                 elif line:
@@ -5073,40 +5875,48 @@ class TestNetworkdNetRendering(CiTestCase):
     @mock.patch("cloudinit.net.sys_dev_path")
     @mock.patch("cloudinit.net.read_sys_net")
     @mock.patch("cloudinit.net.get_devicelist")
-    def test_networkd_default_generation(self, mock_get_devicelist,
-                                         mock_read_sys_net,
-                                         mock_sys_dev_path,
-                                         m_get_cmdline,
-                                         m_chown):
+    def test_networkd_default_generation(
+        self,
+        mock_get_devicelist,
+        mock_read_sys_net,
+        mock_sys_dev_path,
+        m_get_cmdline,
+        m_chown,
+    ):
         tmp_dir = self.tmp_dir()
-        _setup_test(tmp_dir, mock_get_devicelist,
-                    mock_read_sys_net, mock_sys_dev_path)
+        _setup_test(
+            tmp_dir, mock_get_devicelist, mock_read_sys_net, mock_sys_dev_path
+        )
 
         network_cfg = net.generate_fallback_config()
-        ns = network_state.parse_net_config_data(network_cfg,
-                                                 skip_broken=False)
+        ns = network_state.parse_net_config_data(
+            network_cfg, skip_broken=False
+        )
 
         render_dir = os.path.join(tmp_dir, "render")
         os.makedirs(render_dir)
 
-        render_target = 'etc/systemd/network/10-cloud-init-eth1000.network'
+        render_target = "etc/systemd/network/10-cloud-init-eth1000.network"
         renderer = networkd.Renderer({})
         renderer.render_network_state(ns, target=render_dir)
 
-        self.assertTrue(os.path.exists(os.path.join(render_dir,
-                                                    render_target)))
+        self.assertTrue(
+            os.path.exists(os.path.join(render_dir, render_target))
+        )
         with open(os.path.join(render_dir, render_target)) as fh:
             contents = fh.readlines()
 
         actual = self.create_conf_dict(contents)
         print(actual)
 
-        expected = textwrap.dedent("""\
+        expected = textwrap.dedent(
+            """\
             [Match]
             Name=eth1000
             MACAddress=07-1c-c6-75-a4-be
             [Network]
-            DHCP=ipv4""").rstrip(' ')
+            DHCP=ipv4"""
+        ).rstrip(" ")
 
         expected = self.create_conf_dict(expected.splitlines())
 
@@ -5114,13 +5924,12 @@ class TestNetworkdNetRendering(CiTestCase):
 
 
 class TestNetworkdRoundTrip(CiTestCase):
-
     def create_conf_dict(self, contents):
         content_dict = {}
         for line in contents:
             if line:
                 line = line.strip()
-                if line and re.search(r'^\[(.+)\]$', line):
+                if line and re.search(r"^\[(.+)\]$", line):
                     content_dict[line] = []
                     key = line
                 elif line:
@@ -5132,8 +5941,9 @@ class TestNetworkdRoundTrip(CiTestCase):
         for k, v in actual.items():
             self.assertEqual(sorted(expected[k]), sorted(v))
 
-    def _render_and_read(self, network_config=None, state=None, nwkd_path=None,
-                         dir=None):
+    def _render_and_read(
+        self, network_config=None, state=None, nwkd_path=None, dir=None
+    ):
         if dir is None:
             dir = self.tmp_dir()
 
@@ -5145,24 +5955,24 @@ class TestNetworkdRoundTrip(CiTestCase):
             raise ValueError("Expected data or state, got neither")
 
         if not nwkd_path:
-            nwkd_path = '/etc/systemd/network/'
+            nwkd_path = "/etc/systemd/network/"
 
-        renderer = networkd.Renderer(config={'network_conf_dir': nwkd_path})
+        renderer = networkd.Renderer(config={"network_conf_dir": nwkd_path})
 
         renderer.render_network_state(ns, target=dir)
         return dir2dict(dir)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def testsimple_render_small_networkd(self, m_chown):
-        nwk_fn1 = '/etc/systemd/network/10-cloud-init-eth99.network'
-        nwk_fn2 = '/etc/systemd/network/10-cloud-init-eth1.network'
-        entry = NETWORK_CONFIGS['small']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        nwk_fn1 = "/etc/systemd/network/10-cloud-init-eth99.network"
+        nwk_fn2 = "/etc/systemd/network/10-cloud-init-eth1.network"
+        entry = NETWORK_CONFIGS["small"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
 
         actual = files[nwk_fn1].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd_eth99'].splitlines()
+        expected = entry["expected_networkd_eth99"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
@@ -5170,135 +5980,146 @@ class TestNetworkdRoundTrip(CiTestCase):
         actual = files[nwk_fn2].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd_eth1'].splitlines()
+        expected = entry["expected_networkd_eth1"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def testsimple_render_v4_and_v6(self, m_chown):
-        nwk_fn = '/etc/systemd/network/10-cloud-init-iface0.network'
-        entry = NETWORK_CONFIGS['v4_and_v6']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        nwk_fn = "/etc/systemd/network/10-cloud-init-iface0.network"
+        entry = NETWORK_CONFIGS["v4_and_v6"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
 
         actual = files[nwk_fn].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd'].splitlines()
+        expected = entry["expected_networkd"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def testsimple_render_v4_and_v6_static(self, m_chown):
-        nwk_fn = '/etc/systemd/network/10-cloud-init-iface0.network'
-        entry = NETWORK_CONFIGS['v4_and_v6_static']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        nwk_fn = "/etc/systemd/network/10-cloud-init-iface0.network"
+        entry = NETWORK_CONFIGS["v4_and_v6_static"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
 
         actual = files[nwk_fn].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd'].splitlines()
+        expected = entry["expected_networkd"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def testsimple_render_dhcpv6_only(self, m_chown):
-        nwk_fn = '/etc/systemd/network/10-cloud-init-iface0.network'
-        entry = NETWORK_CONFIGS['dhcpv6_only']
-        files = self._render_and_read(network_config=yaml.load(entry['yaml']))
+        nwk_fn = "/etc/systemd/network/10-cloud-init-iface0.network"
+        entry = NETWORK_CONFIGS["dhcpv6_only"]
+        files = self._render_and_read(network_config=yaml.load(entry["yaml"]))
 
         actual = files[nwk_fn].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd'].splitlines()
+        expected = entry["expected_networkd"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def test_dhcpv6_accept_ra_config_v1(self, m_chown):
-        nwk_fn = '/etc/systemd/network/10-cloud-init-iface0.network'
-        entry = NETWORK_CONFIGS['dhcpv6_accept_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        nwk_fn = "/etc/systemd/network/10-cloud-init-iface0.network"
+        entry = NETWORK_CONFIGS["dhcpv6_accept_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
 
         actual = files[nwk_fn].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd'].splitlines()
+        expected = entry["expected_networkd"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def test_dhcpv6_accept_ra_config_v2(self, m_chown):
-        nwk_fn = '/etc/systemd/network/10-cloud-init-iface0.network'
-        entry = NETWORK_CONFIGS['dhcpv6_accept_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        nwk_fn = "/etc/systemd/network/10-cloud-init-iface0.network"
+        entry = NETWORK_CONFIGS["dhcpv6_accept_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
 
         actual = files[nwk_fn].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd'].splitlines()
+        expected = entry["expected_networkd"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def test_dhcpv6_reject_ra_config_v1(self, m_chown):
-        nwk_fn = '/etc/systemd/network/10-cloud-init-iface0.network'
-        entry = NETWORK_CONFIGS['dhcpv6_reject_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v1']))
+        nwk_fn = "/etc/systemd/network/10-cloud-init-iface0.network"
+        entry = NETWORK_CONFIGS["dhcpv6_reject_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v1"])
+        )
 
         actual = files[nwk_fn].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd'].splitlines()
+        expected = entry["expected_networkd"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
     @mock.patch("cloudinit.net.util.chownbyname", return_value=True)
     def test_dhcpv6_reject_ra_config_v2(self, m_chown):
-        nwk_fn = '/etc/systemd/network/10-cloud-init-iface0.network'
-        entry = NETWORK_CONFIGS['dhcpv6_reject_ra']
-        files = self._render_and_read(network_config=yaml.load(
-            entry['yaml_v2']))
+        nwk_fn = "/etc/systemd/network/10-cloud-init-iface0.network"
+        entry = NETWORK_CONFIGS["dhcpv6_reject_ra"]
+        files = self._render_and_read(
+            network_config=yaml.load(entry["yaml_v2"])
+        )
 
         actual = files[nwk_fn].splitlines()
         actual = self.create_conf_dict(actual)
 
-        expected = entry['expected_networkd'].splitlines()
+        expected = entry["expected_networkd"].splitlines()
         expected = self.create_conf_dict(expected)
 
         self.compare_dicts(actual, expected)
 
 
 class TestRenderersSelect:
-
     @pytest.mark.parametrize(
-        'renderer_selected,netplan,eni,nm,scfg,sys,networkd', (
+        "renderer_selected,netplan,eni,nm,scfg,sys,networkd",
+        (
             # -netplan -ifupdown -nm -scfg -sys raises error
-            (net.RendererNotFoundError, False, False, False, False, False,
-             False),
+            (
+                net.RendererNotFoundError,
+                False,
+                False,
+                False,
+                False,
+                False,
+                False,
+            ),
             # -netplan +ifupdown -nm -scfg -sys selects eni
-            ('eni', False, True, False, False, False, False),
+            ("eni", False, True, False, False, False, False),
             # +netplan +ifupdown -nm -scfg -sys selects eni
-            ('eni', True, True, False, False, False, False),
+            ("eni", True, True, False, False, False, False),
             # +netplan -ifupdown -nm -scfg -sys selects netplan
-            ('netplan', True, False, False, False, False, False),
+            ("netplan", True, False, False, False, False, False),
             # Ubuntu with Network-Manager installed
             # +netplan -ifupdown +nm -scfg -sys selects netplan
-            ('netplan', True, False, True, False, False, False),
+            ("netplan", True, False, True, False, False, False),
             # Centos/OpenSuse with Network-Manager installed selects sysconfig
             # -netplan -ifupdown +nm -scfg +sys selects netplan
-            ('sysconfig', False, False, True, False, True, False),
+            ("sysconfig", False, False, True, False, True, False),
             # -netplan -ifupdown -nm -scfg -sys +networkd selects networkd
-            ('networkd', False, False, False, False, False, True),
+            ("networkd", False, False, False, False, False, True),
         ),
     )
     @mock.patch("cloudinit.net.renderers.networkd.available")
@@ -5308,15 +6129,26 @@ class TestRenderersSelect:
     @mock.patch("cloudinit.net.renderers.sysconfig.available_nm")
     @mock.patch("cloudinit.net.renderers.eni.available")
     def test_valid_renderer_from_defaults_depending_on_availability(
-        self, m_eni_avail, m_nm_avail, m_scfg_avail, m_sys_avail,
-        m_netplan_avail, m_networkd_avail, renderer_selected,
-        netplan, eni, nm, scfg, sys, networkd
+        self,
+        m_eni_avail,
+        m_nm_avail,
+        m_scfg_avail,
+        m_sys_avail,
+        m_netplan_avail,
+        m_networkd_avail,
+        renderer_selected,
+        netplan,
+        eni,
+        nm,
+        scfg,
+        sys,
+        networkd,
     ):
         """Assert proper renderer per DEFAULT_PRIORITY given availability."""
-        m_eni_avail.return_value = eni          # ifupdown pkg presence
-        m_nm_avail.return_value = nm            # network-manager presence
-        m_scfg_avail.return_value = scfg        # sysconfig presence
-        m_sys_avail.return_value = sys          # sysconfig/ifup/down presence
+        m_eni_avail.return_value = eni  # ifupdown pkg presence
+        m_nm_avail.return_value = nm  # network-manager presence
+        m_scfg_avail.return_value = scfg  # sysconfig presence
+        m_sys_avail.return_value = sys  # sysconfig/ifup/down presence
         m_netplan_avail.return_value = netplan  # netplan presence
         m_networkd_avail.return_value = networkd  # networkd presence
         if isinstance(renderer_selected, str):
@@ -5335,14 +6167,14 @@ class TestNetRenderers(CiTestCase):
     def test_eni_and_sysconfig_available(self, m_eni_avail, m_sysc_avail):
         m_eni_avail.return_value = True
         m_sysc_avail.return_value = True
-        found = renderers.search(priority=['sysconfig', 'eni'], first=False)
+        found = renderers.search(priority=["sysconfig", "eni"], first=False)
         names = [f[0] for f in found]
-        self.assertEqual(['sysconfig', 'eni'], names)
+        self.assertEqual(["sysconfig", "eni"], names)
 
     @mock.patch("cloudinit.net.renderers.eni.available")
     def test_search_returns_empty_on_none(self, m_eni_avail):
         m_eni_avail.return_value = False
-        found = renderers.search(priority=['eni'], first=False)
+        found = renderers.search(priority=["eni"], first=False)
         self.assertEqual([], found)
 
     @mock.patch("cloudinit.net.renderers.sysconfig.available")
@@ -5351,16 +6183,16 @@ class TestNetRenderers(CiTestCase):
         # available should only be called until one is found.
         m_eni_avail.return_value = True
         m_sysc_avail.side_effect = Exception("Should not call me")
-        found = renderers.search(priority=['eni', 'sysconfig'], first=True)[0]
-        self.assertEqual(['eni'], [found[0]])
+        found = renderers.search(priority=["eni", "sysconfig"], first=True)[0]
+        self.assertEqual(["eni"], [found[0]])
 
     @mock.patch("cloudinit.net.renderers.sysconfig.available")
     @mock.patch("cloudinit.net.renderers.eni.available")
     def test_select_positive(self, m_eni_avail, m_sysc_avail):
         m_eni_avail.return_value = True
         m_sysc_avail.return_value = False
-        found = renderers.select(priority=['sysconfig', 'eni'])
-        self.assertEqual('eni', found[0])
+        found = renderers.select(priority=["sysconfig", "eni"])
+        self.assertEqual("eni", found[0])
 
     @mock.patch("cloudinit.net.renderers.sysconfig.available")
     @mock.patch("cloudinit.net.renderers.eni.available")
@@ -5369,24 +6201,25 @@ class TestNetRenderers(CiTestCase):
         m_eni_avail.return_value = False
         m_sysc_avail.return_value = False
 
-        self.assertRaises(net.RendererNotFoundError, renderers.select,
-                          priority=['sysconfig', 'eni'])
+        self.assertRaises(
+            net.RendererNotFoundError,
+            renderers.select,
+            priority=["sysconfig", "eni"],
+        )
 
     @mock.patch("cloudinit.net.sysconfig.available_sysconfig")
     @mock.patch("cloudinit.util.system_info")
     def test_sysconfig_available_uses_variant_mapping(self, m_info, m_avail):
         m_avail.return_value = True
         variants = [
-            'suse',
-            'centos',
-            'eurolinux',
-            'fedora',
-            'rhel',
+            "suse",
+            "centos",
+            "eurolinux",
+            "fedora",
+            "rhel",
         ]
         for distro_name in variants:
-            m_info.return_value = {
-                "variant": distro_name
-            }
+            m_info.return_value = {"variant": distro_name}
             if hasattr(util.system_info, "cache_clear"):
                 util.system_info.cache_clear()
             result = sysconfig.available()
@@ -5395,73 +6228,93 @@ class TestNetRenderers(CiTestCase):
     @mock.patch("cloudinit.net.renderers.networkd.available")
     def test_networkd_available(self, m_nwkd_avail):
         m_nwkd_avail.return_value = True
-        found = renderers.search(priority=['networkd'], first=False)
-        self.assertEqual('networkd', found[0][0])
+        found = renderers.search(priority=["networkd"], first=False)
+        self.assertEqual("networkd", found[0][0])
 
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestGetInterfaces(CiTestCase):
-    _data = {'bonds': ['bond1'],
-             'bridges': ['bridge1'],
-             'vlans': ['bond1.101'],
-             'own_macs': ['enp0s1', 'enp0s2', 'bridge1-nic', 'bridge1',
-                          'bond1.101', 'lo', 'eth1'],
-             'macs': {'enp0s1': 'aa:aa:aa:aa:aa:01',
-                      'enp0s2': 'aa:aa:aa:aa:aa:02',
-                      'bond1': 'aa:aa:aa:aa:aa:01',
-                      'bond1.101': 'aa:aa:aa:aa:aa:01',
-                      'bridge1': 'aa:aa:aa:aa:aa:03',
-                      'bridge1-nic': 'aa:aa:aa:aa:aa:03',
-                      'lo': '00:00:00:00:00:00',
-                      'greptap0': '00:00:00:00:00:00',
-                      'eth1': 'aa:aa:aa:aa:aa:01',
-                      'tun0': None},
-             'drivers': {'enp0s1': 'virtio_net',
-                         'enp0s2': 'e1000',
-                         'bond1': None,
-                         'bond1.101': None,
-                         'bridge1': None,
-                         'bridge1-nic': None,
-                         'lo': None,
-                         'greptap0': None,
-                         'eth1': 'mlx4_core',
-                         'tun0': None}}
+    _data = {
+        "bonds": ["bond1"],
+        "bridges": ["bridge1"],
+        "vlans": ["bond1.101"],
+        "own_macs": [
+            "enp0s1",
+            "enp0s2",
+            "bridge1-nic",
+            "bridge1",
+            "bond1.101",
+            "lo",
+            "eth1",
+        ],
+        "macs": {
+            "enp0s1": "aa:aa:aa:aa:aa:01",
+            "enp0s2": "aa:aa:aa:aa:aa:02",
+            "bond1": "aa:aa:aa:aa:aa:01",
+            "bond1.101": "aa:aa:aa:aa:aa:01",
+            "bridge1": "aa:aa:aa:aa:aa:03",
+            "bridge1-nic": "aa:aa:aa:aa:aa:03",
+            "lo": "00:00:00:00:00:00",
+            "greptap0": "00:00:00:00:00:00",
+            "eth1": "aa:aa:aa:aa:aa:01",
+            "tun0": None,
+        },
+        "drivers": {
+            "enp0s1": "virtio_net",
+            "enp0s2": "e1000",
+            "bond1": None,
+            "bond1.101": None,
+            "bridge1": None,
+            "bridge1-nic": None,
+            "lo": None,
+            "greptap0": None,
+            "eth1": "mlx4_core",
+            "tun0": None,
+        },
+    }
     data = {}
 
     def _se_get_devicelist(self):
-        return list(self.data['devices'])
+        return list(self.data["devices"])
 
     def _se_device_driver(self, name):
-        return self.data['drivers'][name]
+        return self.data["drivers"][name]
 
     def _se_device_devid(self, name):
-        return '0x%s' % sorted(list(self.data['drivers'].keys())).index(name)
+        return "0x%s" % sorted(list(self.data["drivers"].keys())).index(name)
 
     def _se_get_interface_mac(self, name):
-        return self.data['macs'][name]
+        return self.data["macs"][name]
 
     def _se_is_bridge(self, name):
-        return name in self.data['bridges']
+        return name in self.data["bridges"]
 
     def _se_is_vlan(self, name):
-        return name in self.data['vlans']
+        return name in self.data["vlans"]
 
     def _se_interface_has_own_mac(self, name):
-        return name in self.data['own_macs']
+        return name in self.data["own_macs"]
 
     def _mock_setup(self):
         self.data = copy.deepcopy(self._data)
-        self.data['devices'] = set(list(self.data['macs'].keys()))
-        mocks = ('get_devicelist', 'get_interface_mac', 'is_bridge',
-                 'interface_has_own_mac', 'is_vlan', 'device_driver',
-                 'device_devid')
+        self.data["devices"] = set(list(self.data["macs"].keys()))
+        mocks = (
+            "get_devicelist",
+            "get_interface_mac",
+            "is_bridge",
+            "interface_has_own_mac",
+            "is_vlan",
+            "device_driver",
+            "device_devid",
+        )
         self.mocks = {}
         for n in mocks:
-            m = mock.patch('cloudinit.net.' + n,
-                           side_effect=getattr(self, '_se_' + n))
+            m = mock.patch(
+                "cloudinit.net." + n, side_effect=getattr(self, "_se_" + n)
+            )
             self.addCleanup(m.stop)
             self.mocks[n] = m.start()
 
@@ -5469,30 +6322,31 @@ class TestGetInterfaces(CiTestCase):
         self._mock_setup()
         ret = net.get_interfaces()
 
-        self.assertIn('enp0s1', self._se_get_devicelist())
-        self.assertIn('eth1', self._se_get_devicelist())
-        found = [ent for ent in ret if 'aa:aa:aa:aa:aa:01' in ent]
+        self.assertIn("enp0s1", self._se_get_devicelist())
+        self.assertIn("eth1", self._se_get_devicelist())
+        found = [ent for ent in ret if "aa:aa:aa:aa:aa:01" in ent]
         self.assertEqual(len(found), 2)
 
     def test_gi_excludes_any_without_mac_address(self):
         self._mock_setup()
         ret = net.get_interfaces()
 
-        self.assertIn('tun0', self._se_get_devicelist())
-        found = [ent for ent in ret if 'tun0' in ent]
+        self.assertIn("tun0", self._se_get_devicelist())
+        found = [ent for ent in ret if "tun0" in ent]
         self.assertEqual(len(found), 0)
 
     def test_gi_excludes_stolen_macs(self):
         self._mock_setup()
         ret = net.get_interfaces()
-        self.mocks['interface_has_own_mac'].assert_has_calls(
-            [mock.call('enp0s1'), mock.call('bond1')], any_order=True)
+        self.mocks["interface_has_own_mac"].assert_has_calls(
+            [mock.call("enp0s1"), mock.call("bond1")], any_order=True
+        )
         expected = [
-            ('enp0s2', 'aa:aa:aa:aa:aa:02', 'e1000', '0x5'),
-            ('enp0s1', 'aa:aa:aa:aa:aa:01', 'virtio_net', '0x4'),
-            ('eth1', 'aa:aa:aa:aa:aa:01', 'mlx4_core', '0x6'),
-            ('lo', '00:00:00:00:00:00', None, '0x8'),
-            ('bridge1-nic', 'aa:aa:aa:aa:aa:03', None, '0x3'),
+            ("enp0s2", "aa:aa:aa:aa:aa:02", "e1000", "0x5"),
+            ("enp0s1", "aa:aa:aa:aa:aa:01", "virtio_net", "0x4"),
+            ("eth1", "aa:aa:aa:aa:aa:01", "mlx4_core", "0x6"),
+            ("lo", "00:00:00:00:00:00", None, "0x8"),
+            ("bridge1-nic", "aa:aa:aa:aa:aa:03", None, "0x3"),
         ]
         self.assertEqual(sorted(expected), sorted(ret))
 
@@ -5501,24 +6355,29 @@ class TestGetInterfaces(CiTestCase):
         # add a device 'b1', make all return they have their "own mac",
         # set everything other than 'b1' to be a bridge.
         # then expect b1 is the only thing left.
-        self.data['macs']['b1'] = 'aa:aa:aa:aa:aa:b1'
-        self.data['drivers']['b1'] = None
-        self.data['devices'].add('b1')
-        self.data['bonds'] = []
-        self.data['own_macs'] = self.data['devices']
-        self.data['bridges'] = [f for f in self.data['devices'] if f != "b1"]
+        self.data["macs"]["b1"] = "aa:aa:aa:aa:aa:b1"
+        self.data["drivers"]["b1"] = None
+        self.data["devices"].add("b1")
+        self.data["bonds"] = []
+        self.data["own_macs"] = self.data["devices"]
+        self.data["bridges"] = [f for f in self.data["devices"] if f != "b1"]
         ret = net.get_interfaces()
-        self.assertEqual([('b1', 'aa:aa:aa:aa:aa:b1', None, '0x0')], ret)
-        self.mocks['is_bridge'].assert_has_calls(
-            [mock.call('bridge1'), mock.call('enp0s1'), mock.call('bond1'),
-             mock.call('b1')],
-            any_order=True)
+        self.assertEqual([("b1", "aa:aa:aa:aa:aa:b1", None, "0x0")], ret)
+        self.mocks["is_bridge"].assert_has_calls(
+            [
+                mock.call("bridge1"),
+                mock.call("enp0s1"),
+                mock.call("bond1"),
+                mock.call("b1"),
+            ],
+            any_order=True,
+        )
 
 
 class TestInterfaceHasOwnMac(CiTestCase):
     """Test interface_has_own_mac.  This is admittedly a bit whitebox."""
 
-    @mock.patch('cloudinit.net.read_sys_net_int', return_value=None)
+    @mock.patch("cloudinit.net.read_sys_net_int", return_value=None)
     def test_non_strict_with_no_addr_assign_type(self, m_read_sys_net_int):
         """If nic does not have addr_assign_type, it is not "stolen".
 
@@ -5535,18 +6394,19 @@ class TestInterfaceHasOwnMac(CiTestCase):
         """
         self.assertTrue(interface_has_own_mac("eth0"))
 
-    @mock.patch('cloudinit.net.read_sys_net_int', return_value=None)
+    @mock.patch("cloudinit.net.read_sys_net_int", return_value=None)
     def test_strict_with_no_addr_assign_type_raises(self, m_read_sys_net_int):
         with self.assertRaises(ValueError):
             interface_has_own_mac("eth0", True)
 
-    @mock.patch('cloudinit.net.read_sys_net_int')
+    @mock.patch("cloudinit.net.read_sys_net_int")
     def test_expected_values(self, m_read_sys_net_int):
         msg = "address_assign_type=%d said to not have own mac"
         for address_assign_type in (0, 1, 3):
             m_read_sys_net_int.return_value = address_assign_type
             self.assertTrue(
-                interface_has_own_mac("eth0", msg % address_assign_type))
+                interface_has_own_mac("eth0", msg % address_assign_type)
+            )
 
         m_read_sys_net_int.return_value = 2
         self.assertFalse(interface_has_own_mac("eth0"))
@@ -5554,218 +6414,281 @@ class TestInterfaceHasOwnMac(CiTestCase):
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestGetInterfacesByMac(CiTestCase):
-    _data = {'bonds': ['bond1'],
-             'bridges': ['bridge1'],
-             'vlans': ['bond1.101'],
-             'own_macs': ['enp0s1', 'enp0s2', 'bridge1-nic', 'bridge1',
-                          'bond1.101', 'lo'],
-             'macs': {'enp0s1': 'aa:aa:aa:aa:aa:01',
-                      'enp0s2': 'aa:aa:aa:aa:aa:02',
-                      'bond1': 'aa:aa:aa:aa:aa:01',
-                      'bond1.101': 'aa:aa:aa:aa:aa:01',
-                      'bridge1': 'aa:aa:aa:aa:aa:03',
-                      'bridge1-nic': 'aa:aa:aa:aa:aa:03',
-                      'lo': '00:00:00:00:00:00',
-                      'greptap0': '00:00:00:00:00:00',
-                      'tun0': None}}
+    _data = {
+        "bonds": ["bond1"],
+        "bridges": ["bridge1"],
+        "vlans": ["bond1.101"],
+        "own_macs": [
+            "enp0s1",
+            "enp0s2",
+            "bridge1-nic",
+            "bridge1",
+            "bond1.101",
+            "lo",
+        ],
+        "macs": {
+            "enp0s1": "aa:aa:aa:aa:aa:01",
+            "enp0s2": "aa:aa:aa:aa:aa:02",
+            "bond1": "aa:aa:aa:aa:aa:01",
+            "bond1.101": "aa:aa:aa:aa:aa:01",
+            "bridge1": "aa:aa:aa:aa:aa:03",
+            "bridge1-nic": "aa:aa:aa:aa:aa:03",
+            "lo": "00:00:00:00:00:00",
+            "greptap0": "00:00:00:00:00:00",
+            "tun0": None,
+        },
+    }
     data = {}
 
     def _se_get_devicelist(self):
-        return list(self.data['devices'])
+        return list(self.data["devices"])
 
     def _se_get_interface_mac(self, name):
-        return self.data['macs'][name]
+        return self.data["macs"][name]
 
     def _se_is_bridge(self, name):
-        return name in self.data['bridges']
+        return name in self.data["bridges"]
 
     def _se_is_vlan(self, name):
-        return name in self.data['vlans']
+        return name in self.data["vlans"]
 
     def _se_interface_has_own_mac(self, name):
-        return name in self.data['own_macs']
+        return name in self.data["own_macs"]
 
     def _se_get_ib_interface_hwaddr(self, name, ethernet_format):
-        ib_hwaddr = self.data.get('ib_hwaddr', {})
+        ib_hwaddr = self.data.get("ib_hwaddr", {})
         return ib_hwaddr.get(name, {}).get(ethernet_format)
 
     def _mock_setup(self):
         self.data = copy.deepcopy(self._data)
-        self.data['devices'] = set(list(self.data['macs'].keys()))
-        mocks = ('get_devicelist', 'get_interface_mac', 'is_bridge',
-                 'interface_has_own_mac', 'is_vlan', 'get_ib_interface_hwaddr')
+        self.data["devices"] = set(list(self.data["macs"].keys()))
+        mocks = (
+            "get_devicelist",
+            "get_interface_mac",
+            "is_bridge",
+            "interface_has_own_mac",
+            "is_vlan",
+            "get_ib_interface_hwaddr",
+        )
         self.mocks = {}
         for n in mocks:
-            m = mock.patch('cloudinit.net.' + n,
-                           side_effect=getattr(self, '_se_' + n))
+            m = mock.patch(
+                "cloudinit.net." + n, side_effect=getattr(self, "_se_" + n)
+            )
             self.addCleanup(m.stop)
             self.mocks[n] = m.start()
 
     def test_raise_exception_on_duplicate_macs(self):
         self._mock_setup()
-        self.data['macs']['bridge1-nic'] = self.data['macs']['enp0s1']
+        self.data["macs"]["bridge1-nic"] = self.data["macs"]["enp0s1"]
         self.assertRaises(RuntimeError, net.get_interfaces_by_mac)
 
     def test_excludes_any_without_mac_address(self):
         self._mock_setup()
         ret = net.get_interfaces_by_mac()
-        self.assertIn('tun0', self._se_get_devicelist())
-        self.assertNotIn('tun0', ret.values())
+        self.assertIn("tun0", self._se_get_devicelist())
+        self.assertNotIn("tun0", ret.values())
 
     def test_excludes_stolen_macs(self):
         self._mock_setup()
         ret = net.get_interfaces_by_mac()
-        self.mocks['interface_has_own_mac'].assert_has_calls(
-            [mock.call('enp0s1'), mock.call('bond1')], any_order=True)
+        self.mocks["interface_has_own_mac"].assert_has_calls(
+            [mock.call("enp0s1"), mock.call("bond1")], any_order=True
+        )
         self.assertEqual(
-            {'aa:aa:aa:aa:aa:01': 'enp0s1', 'aa:aa:aa:aa:aa:02': 'enp0s2',
-             'aa:aa:aa:aa:aa:03': 'bridge1-nic', '00:00:00:00:00:00': 'lo'},
-            ret)
+            {
+                "aa:aa:aa:aa:aa:01": "enp0s1",
+                "aa:aa:aa:aa:aa:02": "enp0s2",
+                "aa:aa:aa:aa:aa:03": "bridge1-nic",
+                "00:00:00:00:00:00": "lo",
+            },
+            ret,
+        )
 
     def test_excludes_bridges(self):
         self._mock_setup()
         # add a device 'b1', make all return they have their "own mac",
         # set everything other than 'b1' to be a bridge.
         # then expect b1 is the only thing left.
-        self.data['macs']['b1'] = 'aa:aa:aa:aa:aa:b1'
-        self.data['devices'].add('b1')
-        self.data['bonds'] = []
-        self.data['own_macs'] = self.data['devices']
-        self.data['bridges'] = [f for f in self.data['devices'] if f != "b1"]
+        self.data["macs"]["b1"] = "aa:aa:aa:aa:aa:b1"
+        self.data["devices"].add("b1")
+        self.data["bonds"] = []
+        self.data["own_macs"] = self.data["devices"]
+        self.data["bridges"] = [f for f in self.data["devices"] if f != "b1"]
         ret = net.get_interfaces_by_mac()
-        self.assertEqual({'aa:aa:aa:aa:aa:b1': 'b1'}, ret)
-        self.mocks['is_bridge'].assert_has_calls(
-            [mock.call('bridge1'), mock.call('enp0s1'), mock.call('bond1'),
-             mock.call('b1')],
-            any_order=True)
+        self.assertEqual({"aa:aa:aa:aa:aa:b1": "b1"}, ret)
+        self.mocks["is_bridge"].assert_has_calls(
+            [
+                mock.call("bridge1"),
+                mock.call("enp0s1"),
+                mock.call("bond1"),
+                mock.call("b1"),
+            ],
+            any_order=True,
+        )
 
     def test_excludes_vlans(self):
         self._mock_setup()
         # add a device 'b1', make all return they have their "own mac",
         # set everything other than 'b1' to be a vlan.
         # then expect b1 is the only thing left.
-        self.data['macs']['b1'] = 'aa:aa:aa:aa:aa:b1'
-        self.data['devices'].add('b1')
-        self.data['bonds'] = []
-        self.data['bridges'] = []
-        self.data['own_macs'] = self.data['devices']
-        self.data['vlans'] = [f for f in self.data['devices'] if f != "b1"]
+        self.data["macs"]["b1"] = "aa:aa:aa:aa:aa:b1"
+        self.data["devices"].add("b1")
+        self.data["bonds"] = []
+        self.data["bridges"] = []
+        self.data["own_macs"] = self.data["devices"]
+        self.data["vlans"] = [f for f in self.data["devices"] if f != "b1"]
         ret = net.get_interfaces_by_mac()
-        self.assertEqual({'aa:aa:aa:aa:aa:b1': 'b1'}, ret)
-        self.mocks['is_vlan'].assert_has_calls(
-            [mock.call('bridge1'), mock.call('enp0s1'), mock.call('bond1'),
-             mock.call('b1')],
-            any_order=True)
+        self.assertEqual({"aa:aa:aa:aa:aa:b1": "b1"}, ret)
+        self.mocks["is_vlan"].assert_has_calls(
+            [
+                mock.call("bridge1"),
+                mock.call("enp0s1"),
+                mock.call("bond1"),
+                mock.call("b1"),
+            ],
+            any_order=True,
+        )
 
     def test_duplicates_of_empty_mac_are_ok(self):
         """Duplicate macs of 00:00:00:00:00:00 should be skipped."""
         self._mock_setup()
         empty_mac = "00:00:00:00:00:00"
-        addnics = ('greptap1', 'lo', 'greptap2')
-        self.data['macs'].update(dict((k, empty_mac) for k in addnics))
-        self.data['devices'].update(set(addnics))
-        self.data['own_macs'].extend(list(addnics))
+        addnics = ("greptap1", "lo", "greptap2")
+        self.data["macs"].update(dict((k, empty_mac) for k in addnics))
+        self.data["devices"].update(set(addnics))
+        self.data["own_macs"].extend(list(addnics))
         ret = net.get_interfaces_by_mac()
-        self.assertEqual('lo', ret[empty_mac])
+        self.assertEqual("lo", ret[empty_mac])
 
     def test_skip_all_zeros(self):
         """Any mac of 00:... should be skipped."""
         self._mock_setup()
         emac1, emac2, emac4, emac6 = (
-            '00', '00:00', '00:00:00:00', '00:00:00:00:00:00')
-        addnics = {'empty1': emac1, 'emac2a': emac2, 'emac2b': emac2,
-                   'emac4': emac4, 'emac6': emac6}
-        self.data['macs'].update(addnics)
-        self.data['devices'].update(set(addnics))
-        self.data['own_macs'].extend(addnics.keys())
+            "00",
+            "00:00",
+            "00:00:00:00",
+            "00:00:00:00:00:00",
+        )
+        addnics = {
+            "empty1": emac1,
+            "emac2a": emac2,
+            "emac2b": emac2,
+            "emac4": emac4,
+            "emac6": emac6,
+        }
+        self.data["macs"].update(addnics)
+        self.data["devices"].update(set(addnics))
+        self.data["own_macs"].extend(addnics.keys())
         ret = net.get_interfaces_by_mac()
-        self.assertEqual('lo', ret['00:00:00:00:00:00'])
+        self.assertEqual("lo", ret["00:00:00:00:00:00"])
 
     def test_ib(self):
-        ib_addr = '80:00:00:28:fe:80:00:00:00:00:00:00:00:11:22:03:00:33:44:56'
-        ib_addr_eth_format = '00:11:22:33:44:56'
+        ib_addr = "80:00:00:28:fe:80:00:00:00:00:00:00:00:11:22:03:00:33:44:56"
+        ib_addr_eth_format = "00:11:22:33:44:56"
         self._mock_setup()
-        self.data['devices'] = ['enp0s1', 'ib0']
-        self.data['own_macs'].append('ib0')
-        self.data['macs']['ib0'] = ib_addr
-        self.data['ib_hwaddr'] = {'ib0': {True: ib_addr_eth_format,
-                                          False: ib_addr}}
+        self.data["devices"] = ["enp0s1", "ib0"]
+        self.data["own_macs"].append("ib0")
+        self.data["macs"]["ib0"] = ib_addr
+        self.data["ib_hwaddr"] = {
+            "ib0": {True: ib_addr_eth_format, False: ib_addr}
+        }
         result = net.get_interfaces_by_mac()
-        expected = {'aa:aa:aa:aa:aa:01': 'enp0s1',
-                    ib_addr_eth_format: 'ib0', ib_addr: 'ib0'}
+        expected = {
+            "aa:aa:aa:aa:aa:01": "enp0s1",
+            ib_addr_eth_format: "ib0",
+            ib_addr: "ib0",
+        }
         self.assertEqual(expected, result)
 
 
 class TestInterfacesSorting(CiTestCase):
-
     def test_natural_order(self):
-        data = ['ens5', 'ens6', 'ens3', 'ens20', 'ens13', 'ens2']
+        data = ["ens5", "ens6", "ens3", "ens20", "ens13", "ens2"]
         self.assertEqual(
             sorted(data, key=natural_sort_key),
-            ['ens2', 'ens3', 'ens5', 'ens6', 'ens13', 'ens20'])
-        data2 = ['enp2s0', 'enp2s3', 'enp0s3', 'enp0s13', 'enp0s8', 'enp1s2']
+            ["ens2", "ens3", "ens5", "ens6", "ens13", "ens20"],
+        )
+        data2 = ["enp2s0", "enp2s3", "enp0s3", "enp0s13", "enp0s8", "enp1s2"]
         self.assertEqual(
             sorted(data2, key=natural_sort_key),
-            ['enp0s3', 'enp0s8', 'enp0s13', 'enp1s2', 'enp2s0', 'enp2s3'])
+            ["enp0s3", "enp0s8", "enp0s13", "enp1s2", "enp2s0", "enp2s3"],
+        )
 
 
 @mock.patch(
     "cloudinit.net.is_openvswitch_internal_interface",
-    mock.Mock(return_value=False)
+    mock.Mock(return_value=False),
 )
 class TestGetIBHwaddrsByInterface(CiTestCase):
 
-    _ib_addr = '80:00:00:28:fe:80:00:00:00:00:00:00:00:11:22:03:00:33:44:56'
-    _ib_addr_eth_format = '00:11:22:33:44:56'
-    _data = {'devices': ['enp0s1', 'enp0s2', 'bond1', 'bridge1',
-                         'bridge1-nic', 'tun0', 'ib0'],
-             'bonds': ['bond1'],
-             'bridges': ['bridge1'],
-             'own_macs': ['enp0s1', 'enp0s2', 'bridge1-nic', 'bridge1', 'ib0'],
-             'macs': {'enp0s1': 'aa:aa:aa:aa:aa:01',
-                      'enp0s2': 'aa:aa:aa:aa:aa:02',
-                      'bond1': 'aa:aa:aa:aa:aa:01',
-                      'bridge1': 'aa:aa:aa:aa:aa:03',
-                      'bridge1-nic': 'aa:aa:aa:aa:aa:03',
-                      'tun0': None,
-                      'ib0': _ib_addr},
-             'ib_hwaddr': {'ib0': {True: _ib_addr_eth_format,
-                                   False: _ib_addr}}}
+    _ib_addr = "80:00:00:28:fe:80:00:00:00:00:00:00:00:11:22:03:00:33:44:56"
+    _ib_addr_eth_format = "00:11:22:33:44:56"
+    _data = {
+        "devices": [
+            "enp0s1",
+            "enp0s2",
+            "bond1",
+            "bridge1",
+            "bridge1-nic",
+            "tun0",
+            "ib0",
+        ],
+        "bonds": ["bond1"],
+        "bridges": ["bridge1"],
+        "own_macs": ["enp0s1", "enp0s2", "bridge1-nic", "bridge1", "ib0"],
+        "macs": {
+            "enp0s1": "aa:aa:aa:aa:aa:01",
+            "enp0s2": "aa:aa:aa:aa:aa:02",
+            "bond1": "aa:aa:aa:aa:aa:01",
+            "bridge1": "aa:aa:aa:aa:aa:03",
+            "bridge1-nic": "aa:aa:aa:aa:aa:03",
+            "tun0": None,
+            "ib0": _ib_addr,
+        },
+        "ib_hwaddr": {"ib0": {True: _ib_addr_eth_format, False: _ib_addr}},
+    }
     data = {}
 
     def _mock_setup(self):
         self.data = copy.deepcopy(self._data)
-        mocks = ('get_devicelist', 'get_interface_mac', 'is_bridge',
-                 'interface_has_own_mac', 'get_ib_interface_hwaddr')
+        mocks = (
+            "get_devicelist",
+            "get_interface_mac",
+            "is_bridge",
+            "interface_has_own_mac",
+            "get_ib_interface_hwaddr",
+        )
         self.mocks = {}
         for n in mocks:
-            m = mock.patch('cloudinit.net.' + n,
-                           side_effect=getattr(self, '_se_' + n))
+            m = mock.patch(
+                "cloudinit.net." + n, side_effect=getattr(self, "_se_" + n)
+            )
             self.addCleanup(m.stop)
             self.mocks[n] = m.start()
 
     def _se_get_devicelist(self):
-        return self.data['devices']
+        return self.data["devices"]
 
     def _se_get_interface_mac(self, name):
-        return self.data['macs'][name]
+        return self.data["macs"][name]
 
     def _se_is_bridge(self, name):
-        return name in self.data['bridges']
+        return name in self.data["bridges"]
 
     def _se_interface_has_own_mac(self, name):
-        return name in self.data['own_macs']
+        return name in self.data["own_macs"]
 
     def _se_get_ib_interface_hwaddr(self, name, ethernet_format):
-        ib_hwaddr = self.data.get('ib_hwaddr', {})
+        ib_hwaddr = self.data.get("ib_hwaddr", {})
         return ib_hwaddr.get(name, {}).get(ethernet_format)
 
     def test_ethernet(self):
         self._mock_setup()
-        self.data['devices'].remove('ib0')
+        self.data["devices"].remove("ib0")
         result = net.get_ib_hwaddrs_by_interface()
         expected = {}
         self.assertEqual(expected, result)
@@ -5773,7 +6696,7 @@ class TestGetIBHwaddrsByInterface(CiTestCase):
     def test_ib(self):
         self._mock_setup()
         result = net.get_ib_hwaddrs_by_interface()
-        expected = {'ib0': self._ib_addr}
+        expected = {"ib0": self._ib_addr}
         self.assertEqual(expected, result)
 
 
@@ -5786,239 +6709,305 @@ def _gzip_data(data):
 
 
 class TestRenameInterfaces(CiTestCase):
-
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_rename_all(self, mock_subp):
         renames = [
-            ('00:11:22:33:44:55', 'interface0', 'virtio_net', '0x3'),
-            ('00:11:22:33:44:aa', 'interface2', 'virtio_net', '0x5'),
+            ("00:11:22:33:44:55", "interface0", "virtio_net", "0x3"),
+            ("00:11:22:33:44:aa", "interface2", "virtio_net", "0x5"),
         ]
         current_info = {
-            'ens3': {
-                'downable': True,
-                'device_id': '0x3',
-                'driver': 'virtio_net',
-                'mac': '00:11:22:33:44:55',
-                'name': 'ens3',
-                'up': False},
-            'ens5': {
-                'downable': True,
-                'device_id': '0x5',
-                'driver': 'virtio_net',
-                'mac': '00:11:22:33:44:aa',
-                'name': 'ens5',
-                'up': False},
+            "ens3": {
+                "downable": True,
+                "device_id": "0x3",
+                "driver": "virtio_net",
+                "mac": "00:11:22:33:44:55",
+                "name": "ens3",
+                "up": False,
+            },
+            "ens5": {
+                "downable": True,
+                "device_id": "0x5",
+                "driver": "virtio_net",
+                "mac": "00:11:22:33:44:aa",
+                "name": "ens5",
+                "up": False,
+            },
         }
         net._rename_interfaces(renames, current_info=current_info)
         print(mock_subp.call_args_list)
-        mock_subp.assert_has_calls([
-            mock.call(['ip', 'link', 'set', 'ens3', 'name', 'interface0'],
-                      capture=True),
-            mock.call(['ip', 'link', 'set', 'ens5', 'name', 'interface2'],
-                      capture=True),
-        ])
-
-    @mock.patch('cloudinit.subp.subp')
+        mock_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["ip", "link", "set", "ens3", "name", "interface0"],
+                    capture=True,
+                ),
+                mock.call(
+                    ["ip", "link", "set", "ens5", "name", "interface2"],
+                    capture=True,
+                ),
+            ]
+        )
+
+    @mock.patch("cloudinit.subp.subp")
     def test_rename_no_driver_no_device_id(self, mock_subp):
         renames = [
-            ('00:11:22:33:44:55', 'interface0', None, None),
-            ('00:11:22:33:44:aa', 'interface1', None, None),
+            ("00:11:22:33:44:55", "interface0", None, None),
+            ("00:11:22:33:44:aa", "interface1", None, None),
         ]
         current_info = {
-            'eth0': {
-                'downable': True,
-                'device_id': None,
-                'driver': None,
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth0',
-                'up': False},
-            'eth1': {
-                'downable': True,
-                'device_id': None,
-                'driver': None,
-                'mac': '00:11:22:33:44:aa',
-                'name': 'eth1',
-                'up': False},
+            "eth0": {
+                "downable": True,
+                "device_id": None,
+                "driver": None,
+                "mac": "00:11:22:33:44:55",
+                "name": "eth0",
+                "up": False,
+            },
+            "eth1": {
+                "downable": True,
+                "device_id": None,
+                "driver": None,
+                "mac": "00:11:22:33:44:aa",
+                "name": "eth1",
+                "up": False,
+            },
         }
         net._rename_interfaces(renames, current_info=current_info)
         print(mock_subp.call_args_list)
-        mock_subp.assert_has_calls([
-            mock.call(['ip', 'link', 'set', 'eth0', 'name', 'interface0'],
-                      capture=True),
-            mock.call(['ip', 'link', 'set', 'eth1', 'name', 'interface1'],
-                      capture=True),
-        ])
-
-    @mock.patch('cloudinit.subp.subp')
+        mock_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["ip", "link", "set", "eth0", "name", "interface0"],
+                    capture=True,
+                ),
+                mock.call(
+                    ["ip", "link", "set", "eth1", "name", "interface1"],
+                    capture=True,
+                ),
+            ]
+        )
+
+    @mock.patch("cloudinit.subp.subp")
     def test_rename_all_bounce(self, mock_subp):
         renames = [
-            ('00:11:22:33:44:55', 'interface0', 'virtio_net', '0x3'),
-            ('00:11:22:33:44:aa', 'interface2', 'virtio_net', '0x5'),
+            ("00:11:22:33:44:55", "interface0", "virtio_net", "0x3"),
+            ("00:11:22:33:44:aa", "interface2", "virtio_net", "0x5"),
         ]
         current_info = {
-            'ens3': {
-                'downable': True,
-                'device_id': '0x3',
-                'driver': 'virtio_net',
-                'mac': '00:11:22:33:44:55',
-                'name': 'ens3',
-                'up': True},
-            'ens5': {
-                'downable': True,
-                'device_id': '0x5',
-                'driver': 'virtio_net',
-                'mac': '00:11:22:33:44:aa',
-                'name': 'ens5',
-                'up': True},
+            "ens3": {
+                "downable": True,
+                "device_id": "0x3",
+                "driver": "virtio_net",
+                "mac": "00:11:22:33:44:55",
+                "name": "ens3",
+                "up": True,
+            },
+            "ens5": {
+                "downable": True,
+                "device_id": "0x5",
+                "driver": "virtio_net",
+                "mac": "00:11:22:33:44:aa",
+                "name": "ens5",
+                "up": True,
+            },
         }
         net._rename_interfaces(renames, current_info=current_info)
         print(mock_subp.call_args_list)
-        mock_subp.assert_has_calls([
-            mock.call(['ip', 'link', 'set', 'ens3', 'down'], capture=True),
-            mock.call(['ip', 'link', 'set', 'ens3', 'name', 'interface0'],
-                      capture=True),
-            mock.call(['ip', 'link', 'set', 'ens5', 'down'], capture=True),
-            mock.call(['ip', 'link', 'set', 'ens5', 'name', 'interface2'],
-                      capture=True),
-            mock.call(['ip', 'link', 'set', 'interface0', 'up'], capture=True),
-            mock.call(['ip', 'link', 'set', 'interface2', 'up'], capture=True)
-        ])
-
-    @mock.patch('cloudinit.subp.subp')
+        mock_subp.assert_has_calls(
+            [
+                mock.call(["ip", "link", "set", "ens3", "down"], capture=True),
+                mock.call(
+                    ["ip", "link", "set", "ens3", "name", "interface0"],
+                    capture=True,
+                ),
+                mock.call(["ip", "link", "set", "ens5", "down"], capture=True),
+                mock.call(
+                    ["ip", "link", "set", "ens5", "name", "interface2"],
+                    capture=True,
+                ),
+                mock.call(
+                    ["ip", "link", "set", "interface0", "up"], capture=True
+                ),
+                mock.call(
+                    ["ip", "link", "set", "interface2", "up"], capture=True
+                ),
+            ]
+        )
+
+    @mock.patch("cloudinit.subp.subp")
     def test_rename_duplicate_macs(self, mock_subp):
         renames = [
-            ('00:11:22:33:44:55', 'eth0', 'hv_netsvc', '0x3'),
-            ('00:11:22:33:44:55', 'vf1', 'mlx4_core', '0x5'),
+            ("00:11:22:33:44:55", "eth0", "hv_netsvc", "0x3"),
+            ("00:11:22:33:44:55", "vf1", "mlx4_core", "0x5"),
         ]
         current_info = {
-            'eth0': {
-                'downable': True,
-                'device_id': '0x3',
-                'driver': 'hv_netsvc',
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth0',
-                'up': False},
-            'eth1': {
-                'downable': True,
-                'device_id': '0x5',
-                'driver': 'mlx4_core',
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth1',
-                'up': False},
+            "eth0": {
+                "downable": True,
+                "device_id": "0x3",
+                "driver": "hv_netsvc",
+                "mac": "00:11:22:33:44:55",
+                "name": "eth0",
+                "up": False,
+            },
+            "eth1": {
+                "downable": True,
+                "device_id": "0x5",
+                "driver": "mlx4_core",
+                "mac": "00:11:22:33:44:55",
+                "name": "eth1",
+                "up": False,
+            },
         }
         net._rename_interfaces(renames, current_info=current_info)
         print(mock_subp.call_args_list)
-        mock_subp.assert_has_calls([
-            mock.call(['ip', 'link', 'set', 'eth1', 'name', 'vf1'],
-                      capture=True),
-        ])
+        mock_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["ip", "link", "set", "eth1", "name", "vf1"], capture=True
+                ),
+            ]
+        )
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_rename_duplicate_macs_driver_no_devid(self, mock_subp):
         renames = [
-            ('00:11:22:33:44:55', 'eth0', 'hv_netsvc', None),
-            ('00:11:22:33:44:55', 'vf1', 'mlx4_core', None),
+            ("00:11:22:33:44:55", "eth0", "hv_netsvc", None),
+            ("00:11:22:33:44:55", "vf1", "mlx4_core", None),
         ]
         current_info = {
-            'eth0': {
-                'downable': True,
-                'device_id': '0x3',
-                'driver': 'hv_netsvc',
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth0',
-                'up': False},
-            'eth1': {
-                'downable': True,
-                'device_id': '0x5',
-                'driver': 'mlx4_core',
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth1',
-                'up': False},
+            "eth0": {
+                "downable": True,
+                "device_id": "0x3",
+                "driver": "hv_netsvc",
+                "mac": "00:11:22:33:44:55",
+                "name": "eth0",
+                "up": False,
+            },
+            "eth1": {
+                "downable": True,
+                "device_id": "0x5",
+                "driver": "mlx4_core",
+                "mac": "00:11:22:33:44:55",
+                "name": "eth1",
+                "up": False,
+            },
         }
         net._rename_interfaces(renames, current_info=current_info)
         print(mock_subp.call_args_list)
-        mock_subp.assert_has_calls([
-            mock.call(['ip', 'link', 'set', 'eth1', 'name', 'vf1'],
-                      capture=True),
-        ])
+        mock_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["ip", "link", "set", "eth1", "name", "vf1"], capture=True
+                ),
+            ]
+        )
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_rename_multi_mac_dups(self, mock_subp):
         renames = [
-            ('00:11:22:33:44:55', 'eth0', 'hv_netsvc', '0x3'),
-            ('00:11:22:33:44:55', 'vf1', 'mlx4_core', '0x5'),
-            ('00:11:22:33:44:55', 'vf2', 'mlx4_core', '0x7'),
+            ("00:11:22:33:44:55", "eth0", "hv_netsvc", "0x3"),
+            ("00:11:22:33:44:55", "vf1", "mlx4_core", "0x5"),
+            ("00:11:22:33:44:55", "vf2", "mlx4_core", "0x7"),
         ]
         current_info = {
-            'eth0': {
-                'downable': True,
-                'device_id': '0x3',
-                'driver': 'hv_netsvc',
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth0',
-                'up': False},
-            'eth1': {
-                'downable': True,
-                'device_id': '0x5',
-                'driver': 'mlx4_core',
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth1',
-                'up': False},
-            'eth2': {
-                'downable': True,
-                'device_id': '0x7',
-                'driver': 'mlx4_core',
-                'mac': '00:11:22:33:44:55',
-                'name': 'eth2',
-                'up': False},
+            "eth0": {
+                "downable": True,
+                "device_id": "0x3",
+                "driver": "hv_netsvc",
+                "mac": "00:11:22:33:44:55",
+                "name": "eth0",
+                "up": False,
+            },
+            "eth1": {
+                "downable": True,
+                "device_id": "0x5",
+                "driver": "mlx4_core",
+                "mac": "00:11:22:33:44:55",
+                "name": "eth1",
+                "up": False,
+            },
+            "eth2": {
+                "downable": True,
+                "device_id": "0x7",
+                "driver": "mlx4_core",
+                "mac": "00:11:22:33:44:55",
+                "name": "eth2",
+                "up": False,
+            },
         }
         net._rename_interfaces(renames, current_info=current_info)
         print(mock_subp.call_args_list)
-        mock_subp.assert_has_calls([
-            mock.call(['ip', 'link', 'set', 'eth1', 'name', 'vf1'],
-                      capture=True),
-            mock.call(['ip', 'link', 'set', 'eth2', 'name', 'vf2'],
-                      capture=True),
-        ])
-
-    @mock.patch('cloudinit.subp.subp')
+        mock_subp.assert_has_calls(
+            [
+                mock.call(
+                    ["ip", "link", "set", "eth1", "name", "vf1"], capture=True
+                ),
+                mock.call(
+                    ["ip", "link", "set", "eth2", "name", "vf2"], capture=True
+                ),
+            ]
+        )
+
+    @mock.patch("cloudinit.subp.subp")
     def test_rename_macs_case_insensitive(self, mock_subp):
         """_rename_interfaces must support upper or lower case macs."""
         renames = [
-            ('aa:aa:aa:aa:aa:aa', 'en0', None, None),
-            ('BB:BB:BB:BB:BB:BB', 'en1', None, None),
-            ('cc:cc:cc:cc:cc:cc', 'en2', None, None),
-            ('DD:DD:DD:DD:DD:DD', 'en3', None, None),
+            ("aa:aa:aa:aa:aa:aa", "en0", None, None),
+            ("BB:BB:BB:BB:BB:BB", "en1", None, None),
+            ("cc:cc:cc:cc:cc:cc", "en2", None, None),
+            ("DD:DD:DD:DD:DD:DD", "en3", None, None),
         ]
         current_info = {
-            'eth0': {'downable': True, 'mac': 'AA:AA:AA:AA:AA:AA',
-                     'name': 'eth0', 'up': False},
-            'eth1': {'downable': True, 'mac': 'bb:bb:bb:bb:bb:bb',
-                     'name': 'eth1', 'up': False},
-            'eth2': {'downable': True, 'mac': 'cc:cc:cc:cc:cc:cc',
-                     'name': 'eth2', 'up': False},
-            'eth3': {'downable': True, 'mac': 'DD:DD:DD:DD:DD:DD',
-                     'name': 'eth3', 'up': False},
+            "eth0": {
+                "downable": True,
+                "mac": "AA:AA:AA:AA:AA:AA",
+                "name": "eth0",
+                "up": False,
+            },
+            "eth1": {
+                "downable": True,
+                "mac": "bb:bb:bb:bb:bb:bb",
+                "name": "eth1",
+                "up": False,
+            },
+            "eth2": {
+                "downable": True,
+                "mac": "cc:cc:cc:cc:cc:cc",
+                "name": "eth2",
+                "up": False,
+            },
+            "eth3": {
+                "downable": True,
+                "mac": "DD:DD:DD:DD:DD:DD",
+                "name": "eth3",
+                "up": False,
+            },
         }
         net._rename_interfaces(renames, current_info=current_info)
 
         expected = [
-            mock.call(['ip', 'link', 'set', 'eth%d' % i, 'name', 'en%d' % i],
-                      capture=True)
-            for i in range(len(renames))]
+            mock.call(
+                ["ip", "link", "set", "eth%d" % i, "name", "en%d" % i],
+                capture=True,
+            )
+            for i in range(len(renames))
+        ]
         mock_subp.assert_has_calls(expected)
 
 
 class TestNetworkState(CiTestCase):
-
     def test_bcast_addr(self):
         """Test mask_and_ipv4_to_bcast_addr proper execution."""
         bcast_addr = network_state.mask_and_ipv4_to_bcast_addr
-        self.assertEqual("192.168.1.255",
-                         bcast_addr("255.255.255.0", "192.168.1.1"))
-        self.assertEqual("128.42.7.255",
-                         bcast_addr("255.255.248.0", "128.42.5.4"))
-        self.assertEqual("10.1.21.255",
-                         bcast_addr("255.255.255.0", "10.1.21.4"))
+        self.assertEqual(
+            "192.168.1.255", bcast_addr("255.255.255.0", "192.168.1.1")
+        )
+        self.assertEqual(
+            "128.42.7.255", bcast_addr("255.255.248.0", "128.42.5.4")
+        )
+        self.assertEqual(
+            "10.1.21.255", bcast_addr("255.255.255.0", "10.1.21.4")
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_net_activators.py b/tests/unittests/test_net_activators.py
index 9da21195..0e3ab43f 100644
--- a/tests/unittests/test_net_activators.py
+++ b/tests/unittests/test_net_activators.py
@@ -5,20 +5,17 @@ import pytest
 
 from cloudinit.net.activators import (
     DEFAULT_PRIORITY,
-    search_activator,
-    select_activator,
-)
-from cloudinit.net.activators import (
     IfUpDownActivator,
     NetplanActivator,
-    NetworkManagerActivator,
     NetworkdActivator,
+    NetworkManagerActivator,
     NoActivatorException,
+    search_activator,
+    select_activator,
 )
 from cloudinit.net.network_state import parse_net_config_data
 from cloudinit.safeyaml import load
 
-
 V1_CONFIG = """\
 version: 1
 config:
@@ -38,23 +35,23 @@ ethernets:
 """
 
 NETPLAN_CALL_LIST = [
-    ((['netplan', 'apply'], ), {}),
+    ((["netplan", "apply"],), {}),
 ]
 
 
 @pytest.yield_fixture
 def available_mocks():
-    mocks = namedtuple('Mocks', 'm_which, m_file')
-    with patch('cloudinit.subp.which', return_value=True) as m_which:
-        with patch('os.path.isfile', return_value=True) as m_file:
+    mocks = namedtuple("Mocks", "m_which, m_file")
+    with patch("cloudinit.subp.which", return_value=True) as m_which:
+        with patch("os.path.isfile", return_value=True) as m_file:
             yield mocks(m_which, m_file)
 
 
 @pytest.yield_fixture
 def unavailable_mocks():
-    mocks = namedtuple('Mocks', 'm_which, m_file')
-    with patch('cloudinit.subp.which', return_value=False) as m_which:
-        with patch('os.path.isfile', return_value=False) as m_file:
+    mocks = namedtuple("Mocks", "m_which, m_file")
+    with patch("cloudinit.subp.which", return_value=False) as m_which:
+        with patch("os.path.isfile", return_value=False) as m_file:
             yield mocks(m_which, m_file)
 
 
@@ -75,14 +72,16 @@ class TestSearchAndSelect:
         assert activator == new_order[0]
 
     def test_target(self, available_mocks):
-        search_activator(target='/tmp')
-        assert '/tmp' == available_mocks.m_which.call_args[1]['target']
+        search_activator(target="/tmp")
+        assert "/tmp" == available_mocks.m_which.call_args[1]["target"]
 
-        select_activator(target='/tmp')
-        assert '/tmp' == available_mocks.m_which.call_args[1]['target']
+        select_activator(target="/tmp")
+        assert "/tmp" == available_mocks.m_which.call_args[1]["target"]
 
-    @patch('cloudinit.net.activators.IfUpDownActivator.available',
-           return_value=False)
+    @patch(
+        "cloudinit.net.activators.IfUpDownActivator.available",
+        return_value=False,
+    )
     def test_first_not_available(self, m_available, available_mocks):
         resp = search_activator()
         assert resp == DEFAULT_PRIORITY[1:]
@@ -92,9 +91,9 @@ class TestSearchAndSelect:
 
     def test_priority_not_exist(self, available_mocks):
         with pytest.raises(ValueError):
-            search_activator(priority=['spam', 'eggs'])
+            search_activator(priority=["spam", "eggs"])
         with pytest.raises(ValueError):
-            select_activator(priority=['spam', 'eggs'])
+            select_activator(priority=["spam", "eggs"])
 
     def test_none_available(self, unavailable_mocks):
         resp = search_activator()
@@ -105,82 +104,86 @@ class TestSearchAndSelect:
 
 
 IF_UP_DOWN_AVAILABLE_CALLS = [
-    (('ifquery',), {'search': ['/sbin', '/usr/sbin'], 'target': None}),
-    (('ifup',), {'search': ['/sbin', '/usr/sbin'], 'target': None}),
-    (('ifdown',), {'search': ['/sbin', '/usr/sbin'], 'target': None}),
+    (("ifquery",), {"search": ["/sbin", "/usr/sbin"], "target": None}),
+    (("ifup",), {"search": ["/sbin", "/usr/sbin"], "target": None}),
+    (("ifdown",), {"search": ["/sbin", "/usr/sbin"], "target": None}),
 ]
 
 NETPLAN_AVAILABLE_CALLS = [
-    (('netplan',), {'search': ['/usr/sbin', '/sbin'], 'target': None}),
+    (("netplan",), {"search": ["/usr/sbin", "/sbin"], "target": None}),
 ]
 
 NETWORK_MANAGER_AVAILABLE_CALLS = [
-    (('nmcli',), {'target': None}),
+    (("nmcli",), {"target": None}),
 ]
 
 NETWORKD_AVAILABLE_CALLS = [
-    (('ip',), {'search': ['/usr/sbin', '/bin'], 'target': None}),
-    (('systemctl',), {'search': ['/usr/sbin', '/bin'], 'target': None}),
+    (("ip",), {"search": ["/usr/sbin", "/bin"], "target": None}),
+    (("systemctl",), {"search": ["/usr/sbin", "/bin"], "target": None}),
 ]
 
 
-@pytest.mark.parametrize('activator, available_calls', [
-    (IfUpDownActivator, IF_UP_DOWN_AVAILABLE_CALLS),
-    (NetplanActivator, NETPLAN_AVAILABLE_CALLS),
-    (NetworkManagerActivator, NETWORK_MANAGER_AVAILABLE_CALLS),
-    (NetworkdActivator, NETWORKD_AVAILABLE_CALLS),
-])
+@pytest.mark.parametrize(
+    "activator, available_calls",
+    [
+        (IfUpDownActivator, IF_UP_DOWN_AVAILABLE_CALLS),
+        (NetplanActivator, NETPLAN_AVAILABLE_CALLS),
+        (NetworkManagerActivator, NETWORK_MANAGER_AVAILABLE_CALLS),
+        (NetworkdActivator, NETWORKD_AVAILABLE_CALLS),
+    ],
+)
 class TestActivatorsAvailable:
-    def test_available(
-        self, activator, available_calls, available_mocks
-    ):
+    def test_available(self, activator, available_calls, available_mocks):
         activator.available()
         assert available_mocks.m_which.call_args_list == available_calls
 
 
 IF_UP_DOWN_BRING_UP_CALL_LIST = [
-    ((['ifup', 'eth0'], ), {}),
-    ((['ifup', 'eth1'], ), {}),
+    ((["ifup", "eth0"],), {}),
+    ((["ifup", "eth1"],), {}),
 ]
 
 NETWORK_MANAGER_BRING_UP_CALL_LIST = [
-    ((['nmcli', 'connection', 'up', 'ifname', 'eth0'], ), {}),
-    ((['nmcli', 'connection', 'up', 'ifname', 'eth1'], ), {}),
+    ((["nmcli", "connection", "up", "ifname", "eth0"],), {}),
+    ((["nmcli", "connection", "up", "ifname", "eth1"],), {}),
 ]
 
 NETWORKD_BRING_UP_CALL_LIST = [
-    ((['ip', 'link', 'set', 'up', 'eth0'], ), {}),
-    ((['ip', 'link', 'set', 'up', 'eth1'], ), {}),
-    ((['systemctl', 'restart', 'systemd-networkd', 'systemd-resolved'], ), {}),
+    ((["ip", "link", "set", "up", "eth0"],), {}),
+    ((["ip", "link", "set", "up", "eth1"],), {}),
+    ((["systemctl", "restart", "systemd-networkd", "systemd-resolved"],), {}),
 ]
 
 
-@pytest.mark.parametrize('activator, expected_call_list', [
-    (IfUpDownActivator, IF_UP_DOWN_BRING_UP_CALL_LIST),
-    (NetplanActivator, NETPLAN_CALL_LIST),
-    (NetworkManagerActivator, NETWORK_MANAGER_BRING_UP_CALL_LIST),
-    (NetworkdActivator, NETWORKD_BRING_UP_CALL_LIST),
-])
+@pytest.mark.parametrize(
+    "activator, expected_call_list",
+    [
+        (IfUpDownActivator, IF_UP_DOWN_BRING_UP_CALL_LIST),
+        (NetplanActivator, NETPLAN_CALL_LIST),
+        (NetworkManagerActivator, NETWORK_MANAGER_BRING_UP_CALL_LIST),
+        (NetworkdActivator, NETWORKD_BRING_UP_CALL_LIST),
+    ],
+)
 class TestActivatorsBringUp:
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_up_interface(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
-        activator.bring_up_interface('eth0')
+        activator.bring_up_interface("eth0")
         assert len(m_subp.call_args_list) == 1
         assert m_subp.call_args_list[0] == expected_call_list[0]
 
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_up_interfaces(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
         index = 0
-        activator.bring_up_interfaces(['eth0', 'eth1'])
+        activator.bring_up_interfaces(["eth0", "eth1"])
         for call in m_subp.call_args_list:
             assert call == expected_call_list[index]
             index += 1
 
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_up_all_interfaces_v1(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
@@ -189,7 +192,7 @@ class TestActivatorsBringUp:
         for call in m_subp.call_args_list:
             assert call in expected_call_list
 
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_up_all_interfaces_v2(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
@@ -200,44 +203,47 @@ class TestActivatorsBringUp:
 
 
 IF_UP_DOWN_BRING_DOWN_CALL_LIST = [
-    ((['ifdown', 'eth0'], ), {}),
-    ((['ifdown', 'eth1'], ), {}),
+    ((["ifdown", "eth0"],), {}),
+    ((["ifdown", "eth1"],), {}),
 ]
 
 NETWORK_MANAGER_BRING_DOWN_CALL_LIST = [
-    ((['nmcli', 'connection', 'down', 'eth0'], ), {}),
-    ((['nmcli', 'connection', 'down', 'eth1'], ), {}),
+    ((["nmcli", "connection", "down", "eth0"],), {}),
+    ((["nmcli", "connection", "down", "eth1"],), {}),
 ]
 
 NETWORKD_BRING_DOWN_CALL_LIST = [
-    ((['ip', 'link', 'set', 'down', 'eth0'], ), {}),
-    ((['ip', 'link', 'set', 'down', 'eth1'], ), {}),
+    ((["ip", "link", "set", "down", "eth0"],), {}),
+    ((["ip", "link", "set", "down", "eth1"],), {}),
 ]
 
 
-@pytest.mark.parametrize('activator, expected_call_list', [
-    (IfUpDownActivator, IF_UP_DOWN_BRING_DOWN_CALL_LIST),
-    (NetplanActivator, NETPLAN_CALL_LIST),
-    (NetworkManagerActivator, NETWORK_MANAGER_BRING_DOWN_CALL_LIST),
-    (NetworkdActivator, NETWORKD_BRING_DOWN_CALL_LIST),
-])
+@pytest.mark.parametrize(
+    "activator, expected_call_list",
+    [
+        (IfUpDownActivator, IF_UP_DOWN_BRING_DOWN_CALL_LIST),
+        (NetplanActivator, NETPLAN_CALL_LIST),
+        (NetworkManagerActivator, NETWORK_MANAGER_BRING_DOWN_CALL_LIST),
+        (NetworkdActivator, NETWORKD_BRING_DOWN_CALL_LIST),
+    ],
+)
 class TestActivatorsBringDown:
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_down_interface(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
-        activator.bring_down_interface('eth0')
+        activator.bring_down_interface("eth0")
         assert len(m_subp.call_args_list) == 1
         assert m_subp.call_args_list[0] == expected_call_list[0]
 
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_down_interfaces(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
-        activator.bring_down_interfaces(['eth0', 'eth1'])
+        activator.bring_down_interfaces(["eth0", "eth1"])
         assert expected_call_list == m_subp.call_args_list
 
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_down_all_interfaces_v1(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
@@ -246,7 +252,7 @@ class TestActivatorsBringDown:
         for call in m_subp.call_args_list:
             assert call in expected_call_list
 
-    @patch('cloudinit.subp.subp', return_value=('', ''))
+    @patch("cloudinit.subp.subp", return_value=("", ""))
     def test_bring_down_all_interfaces_v2(
         self, m_subp, activator, expected_call_list, available_mocks
     ):
diff --git a/tests/unittests/test_net_freebsd.py b/tests/unittests/test_net_freebsd.py
index f0dde097..3facb2bb 100644
--- a/tests/unittests/test_net_freebsd.py
+++ b/tests/unittests/test_net_freebsd.py
@@ -3,8 +3,7 @@ import os
 import cloudinit.net
 import cloudinit.net.network_state
 from cloudinit import safeyaml
-from tests.unittests.helpers import (CiTestCase, mock, readResource, dir2dict)
-
+from tests.unittests.helpers import CiTestCase, dir2dict, mock, readResource
 
 SAMPLE_FREEBSD_IFCONFIG_OUT = readResource("netinfo/freebsd-ifconfig-output")
 V1 = """
@@ -22,34 +21,36 @@ version: 1
 
 
 class TestInterfacesByMac(CiTestCase):
-
-    @mock.patch('cloudinit.subp.subp')
-    @mock.patch('cloudinit.util.is_FreeBSD')
+    @mock.patch("cloudinit.subp.subp")
+    @mock.patch("cloudinit.util.is_FreeBSD")
     def test_get_interfaces_by_mac(self, mock_is_FreeBSD, mock_subp):
         mock_is_FreeBSD.return_value = True
         mock_subp.return_value = (SAMPLE_FREEBSD_IFCONFIG_OUT, 0)
         a = cloudinit.net.get_interfaces_by_mac()
-        assert a == {'52:54:00:50:b7:0d': 'vtnet0',
-                     '80:00:73:63:5c:48': 're0.33',
-                     '02:14:39:0e:25:00': 'bridge0',
-                     '02:ff:60:8c:f3:72': 'vnet0:11'}
+        assert a == {
+            "52:54:00:50:b7:0d": "vtnet0",
+            "80:00:73:63:5c:48": "re0.33",
+            "02:14:39:0e:25:00": "bridge0",
+            "02:ff:60:8c:f3:72": "vnet0:11",
+        }
 
 
 class TestFreeBSDRoundTrip(CiTestCase):
-
-    def _render_and_read(self, network_config=None, state=None,
-                         netplan_path=None, target=None):
+    def _render_and_read(
+        self, network_config=None, state=None, netplan_path=None, target=None
+    ):
         if target is None:
             target = self.tmp_dir()
             os.mkdir("%s/etc" % target)
-            with open("%s/etc/rc.conf" % target, 'a') as fd:
+            with open("%s/etc/rc.conf" % target, "a") as fd:
                 fd.write("# dummy rc.conf\n")
-            with open("%s/etc/resolv.conf" % target, 'a') as fd:
+            with open("%s/etc/resolv.conf" % target, "a") as fd:
                 fd.write("# dummy resolv.conf\n")
 
         if network_config:
             ns = cloudinit.net.network_state.parse_net_config_data(
-                network_config)
+                network_config
+            )
         elif state:
             ns = state
         else:
@@ -59,18 +60,20 @@ class TestFreeBSDRoundTrip(CiTestCase):
         renderer.render_network_state(ns, target=target)
         return dir2dict(target)
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_render_output_has_yaml(self, mock_subp):
 
         entry = {
-            'yaml': V1,
+            "yaml": V1,
         }
-        network_config = safeyaml.load(entry['yaml'])
+        network_config = safeyaml.load(entry["yaml"])
         ns = cloudinit.net.network_state.parse_net_config_data(network_config)
         files = self._render_and_read(state=ns)
         assert files == {
-            '/etc/resolv.conf': '# dummy resolv.conf\n',
-            '/etc/rc.conf': (
+            "/etc/resolv.conf": "# dummy resolv.conf\n",
+            "/etc/rc.conf": (
                 "# dummy rc.conf\n"
                 "ifconfig_eno1="
-                "'172.20.80.129 netmask 255.255.255.128 mtu 1470'\n")}
+                "'172.20.80.129 netmask 255.255.255.128 mtu 1470'\n"
+            ),
+        }
diff --git a/tests/unittests/test_netinfo.py b/tests/unittests/test_netinfo.py
index 238f7b0a..5ed15729 100644
--- a/tests/unittests/test_netinfo.py
+++ b/tests/unittests/test_netinfo.py
@@ -7,7 +7,6 @@ from copy import copy
 from cloudinit.netinfo import netdev_info, netdev_pformat, route_pformat
 from tests.unittests.helpers import CiTestCase, mock, readResource
 
-
 # Example ifconfig and route output
 SAMPLE_OLD_IFCONFIG_OUT = readResource("netinfo/old-ifconfig-output")
 SAMPLE_NEW_IFCONFIG_OUT = readResource("netinfo/new-ifconfig-output")
@@ -27,155 +26,199 @@ class TestNetInfo(CiTestCase):
     maxDiff = None
     with_logs = True
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_netdev_old_nettools_pformat(self, m_subp, m_which):
         """netdev_pformat properly rendering old nettools info."""
-        m_subp.return_value = (SAMPLE_OLD_IFCONFIG_OUT, '')
-        m_which.side_effect = lambda x: x if x == 'ifconfig' else None
+        m_subp.return_value = (SAMPLE_OLD_IFCONFIG_OUT, "")
+        m_which.side_effect = lambda x: x if x == "ifconfig" else None
         content = netdev_pformat()
         self.assertEqual(NETDEV_FORMATTED_OUT, content)
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_netdev_new_nettools_pformat(self, m_subp, m_which):
         """netdev_pformat properly rendering netdev new nettools info."""
-        m_subp.return_value = (SAMPLE_NEW_IFCONFIG_OUT, '')
-        m_which.side_effect = lambda x: x if x == 'ifconfig' else None
+        m_subp.return_value = (SAMPLE_NEW_IFCONFIG_OUT, "")
+        m_which.side_effect = lambda x: x if x == "ifconfig" else None
         content = netdev_pformat()
         self.assertEqual(NETDEV_FORMATTED_OUT, content)
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_netdev_freebsd_nettools_pformat(self, m_subp, m_which):
         """netdev_pformat properly rendering netdev new nettools info."""
-        m_subp.return_value = (SAMPLE_FREEBSD_IFCONFIG_OUT, '')
-        m_which.side_effect = lambda x: x if x == 'ifconfig' else None
+        m_subp.return_value = (SAMPLE_FREEBSD_IFCONFIG_OUT, "")
+        m_which.side_effect = lambda x: x if x == "ifconfig" else None
         content = netdev_pformat()
         print()
         print(content)
         print()
         self.assertEqual(FREEBSD_NETDEV_OUT, content)
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_netdev_iproute_pformat(self, m_subp, m_which):
         """netdev_pformat properly rendering ip route info."""
-        m_subp.return_value = (SAMPLE_IPADDRSHOW_OUT, '')
-        m_which.side_effect = lambda x: x if x == 'ip' else None
+        m_subp.return_value = (SAMPLE_IPADDRSHOW_OUT, "")
+        m_which.side_effect = lambda x: x if x == "ip" else None
         content = netdev_pformat()
         new_output = copy(NETDEV_FORMATTED_OUT)
         # ip route show describes global scopes on ipv4 addresses
         # whereas ifconfig does not. Add proper global/host scope to output.
-        new_output = new_output.replace('|   .    | 50:7b', '| global | 50:7b')
+        new_output = new_output.replace("|   .    | 50:7b", "| global | 50:7b")
         new_output = new_output.replace(
-            '255.0.0.0   |   .    |', '255.0.0.0   |  host  |')
+            "255.0.0.0   |   .    |", "255.0.0.0   |  host  |"
+        )
         self.assertEqual(new_output, content)
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_netdev_warn_on_missing_commands(self, m_subp, m_which):
         """netdev_pformat warns when missing both ip and 'netstat'."""
         m_which.return_value = None  # Niether ip nor netstat found
         content = netdev_pformat()
-        self.assertEqual('\n', content)
+        self.assertEqual("\n", content)
         self.assertEqual(
             "WARNING: Could not print networks: missing 'ip' and 'ifconfig'"
             " commands\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
         m_subp.assert_not_called()
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_netdev_info_nettools_down(self, m_subp, m_which):
         """test netdev_info using nettools and down interfaces."""
         m_subp.return_value = (
-            readResource("netinfo/new-ifconfig-output-down"), "")
-        m_which.side_effect = lambda x: x if x == 'ifconfig' else None
+            readResource("netinfo/new-ifconfig-output-down"),
+            "",
+        )
+        m_which.side_effect = lambda x: x if x == "ifconfig" else None
         self.assertEqual(
-            {'eth0': {'ipv4': [], 'ipv6': [],
-                      'hwaddr': '00:16:3e:de:51:a6', 'up': False},
-             'lo': {'ipv4': [{'ip': '127.0.0.1', 'mask': '255.0.0.0'}],
-                    'ipv6': [{'ip': '::1/128', 'scope6': 'host'}],
-                    'hwaddr': '.', 'up': True}},
-            netdev_info("."))
-
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+            {
+                "eth0": {
+                    "ipv4": [],
+                    "ipv6": [],
+                    "hwaddr": "00:16:3e:de:51:a6",
+                    "up": False,
+                },
+                "lo": {
+                    "ipv4": [{"ip": "127.0.0.1", "mask": "255.0.0.0"}],
+                    "ipv6": [{"ip": "::1/128", "scope6": "host"}],
+                    "hwaddr": ".",
+                    "up": True,
+                },
+            },
+            netdev_info("."),
+        )
+
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_netdev_info_iproute_down(self, m_subp, m_which):
         """Test netdev_info with ip and down interfaces."""
         m_subp.return_value = (
-            readResource("netinfo/sample-ipaddrshow-output-down"), "")
-        m_which.side_effect = lambda x: x if x == 'ip' else None
+            readResource("netinfo/sample-ipaddrshow-output-down"),
+            "",
+        )
+        m_which.side_effect = lambda x: x if x == "ip" else None
         self.assertEqual(
-            {'lo': {'ipv4': [{'ip': '127.0.0.1', 'bcast': '.',
-                              'mask': '255.0.0.0', 'scope': 'host'}],
-                    'ipv6': [{'ip': '::1/128', 'scope6': 'host'}],
-                    'hwaddr': '.', 'up': True},
-             'eth0': {'ipv4': [], 'ipv6': [],
-                      'hwaddr': '00:16:3e:de:51:a6', 'up': False}},
-            netdev_info("."))
-
-    @mock.patch('cloudinit.netinfo.netdev_info')
+            {
+                "lo": {
+                    "ipv4": [
+                        {
+                            "ip": "127.0.0.1",
+                            "bcast": ".",
+                            "mask": "255.0.0.0",
+                            "scope": "host",
+                        }
+                    ],
+                    "ipv6": [{"ip": "::1/128", "scope6": "host"}],
+                    "hwaddr": ".",
+                    "up": True,
+                },
+                "eth0": {
+                    "ipv4": [],
+                    "ipv6": [],
+                    "hwaddr": "00:16:3e:de:51:a6",
+                    "up": False,
+                },
+            },
+            netdev_info("."),
+        )
+
+    @mock.patch("cloudinit.netinfo.netdev_info")
     def test_netdev_pformat_with_down(self, m_netdev_info):
         """test netdev_pformat when netdev_info returns 'down' interfaces."""
-        m_netdev_info.return_value = (
-            {'lo': {'ipv4': [{'ip': '127.0.0.1', 'mask': '255.0.0.0',
-                              'scope': 'host'}],
-                    'ipv6': [{'ip': '::1/128', 'scope6': 'host'}],
-                    'hwaddr': '.', 'up': True},
-             'eth0': {'ipv4': [], 'ipv6': [],
-                      'hwaddr': '00:16:3e:de:51:a6', 'up': False}})
+        m_netdev_info.return_value = {
+            "lo": {
+                "ipv4": [
+                    {"ip": "127.0.0.1", "mask": "255.0.0.0", "scope": "host"}
+                ],
+                "ipv6": [{"ip": "::1/128", "scope6": "host"}],
+                "hwaddr": ".",
+                "up": True,
+            },
+            "eth0": {
+                "ipv4": [],
+                "ipv6": [],
+                "hwaddr": "00:16:3e:de:51:a6",
+                "up": False,
+            },
+        }
         self.assertEqual(
             readResource("netinfo/netdev-formatted-output-down"),
-            netdev_pformat())
+            netdev_pformat(),
+        )
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_route_nettools_pformat(self, m_subp, m_which):
         """route_pformat properly rendering nettools route info."""
 
         def subp_netstat_route_selector(*args, **kwargs):
-            if args[0] == ['netstat', '--route', '--numeric', '--extend']:
-                return (SAMPLE_ROUTE_OUT_V4, '')
-            if args[0] == ['netstat', '-A', 'inet6', '--route', '--numeric']:
-                return (SAMPLE_ROUTE_OUT_V6, '')
-            raise Exception('Unexpected subp call %s' % args[0])
+            if args[0] == ["netstat", "--route", "--numeric", "--extend"]:
+                return (SAMPLE_ROUTE_OUT_V4, "")
+            if args[0] == ["netstat", "-A", "inet6", "--route", "--numeric"]:
+                return (SAMPLE_ROUTE_OUT_V6, "")
+            raise Exception("Unexpected subp call %s" % args[0])
 
         m_subp.side_effect = subp_netstat_route_selector
-        m_which.side_effect = lambda x: x if x == 'netstat' else None
+        m_which.side_effect = lambda x: x if x == "netstat" else None
         content = route_pformat()
         self.assertEqual(ROUTE_FORMATTED_OUT, content)
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_route_iproute_pformat(self, m_subp, m_which):
         """route_pformat properly rendering ip route info."""
 
         def subp_iproute_selector(*args, **kwargs):
-            if ['ip', '-o', 'route', 'list'] == args[0]:
-                return (SAMPLE_IPROUTE_OUT_V4, '')
-            v6cmd = ['ip', '--oneline', '-6', 'route', 'list', 'table', 'all']
+            if ["ip", "-o", "route", "list"] == args[0]:
+                return (SAMPLE_IPROUTE_OUT_V4, "")
+            v6cmd = ["ip", "--oneline", "-6", "route", "list", "table", "all"]
             if v6cmd == args[0]:
-                return (SAMPLE_IPROUTE_OUT_V6, '')
-            raise Exception('Unexpected subp call %s' % args[0])
+                return (SAMPLE_IPROUTE_OUT_V6, "")
+            raise Exception("Unexpected subp call %s" % args[0])
 
         m_subp.side_effect = subp_iproute_selector
-        m_which.side_effect = lambda x: x if x == 'ip' else None
+        m_which.side_effect = lambda x: x if x == "ip" else None
         content = route_pformat()
         self.assertEqual(ROUTE_FORMATTED_OUT, content)
 
-    @mock.patch('cloudinit.netinfo.subp.which')
-    @mock.patch('cloudinit.netinfo.subp.subp')
+    @mock.patch("cloudinit.netinfo.subp.which")
+    @mock.patch("cloudinit.netinfo.subp.subp")
     def test_route_warn_on_missing_commands(self, m_subp, m_which):
         """route_pformat warns when missing both ip and 'netstat'."""
         m_which.return_value = None  # Niether ip nor netstat found
         content = route_pformat()
-        self.assertEqual('\n', content)
+        self.assertEqual("\n", content)
         self.assertEqual(
             "WARNING: Could not print routes: missing 'ip' and 'netstat'"
             " commands\n",
-            self.logs.getvalue())
+            self.logs.getvalue(),
+        )
         m_subp.assert_not_called()
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_pathprefix2dict.py b/tests/unittests/test_pathprefix2dict.py
index 4e737ad7..83141263 100644
--- a/tests/unittests/test_pathprefix2dict.py
+++ b/tests/unittests/test_pathprefix2dict.py
@@ -1,46 +1,46 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit import util
-
-from tests.unittests.helpers import TestCase, populate_dir
-
 import shutil
 import tempfile
 
+from cloudinit import util
+from tests.unittests.helpers import TestCase, populate_dir
 
-class TestPathPrefix2Dict(TestCase):
 
+class TestPathPrefix2Dict(TestCase):
     def setUp(self):
         super(TestPathPrefix2Dict, self).setUp()
         self.tmp = tempfile.mkdtemp()
         self.addCleanup(shutil.rmtree, self.tmp)
 
     def test_required_only(self):
-        dirdata = {'f1': b'f1content', 'f2': b'f2content'}
+        dirdata = {"f1": b"f1content", "f2": b"f2content"}
         populate_dir(self.tmp, dirdata)
 
-        ret = util.pathprefix2dict(self.tmp, required=['f1', 'f2'])
+        ret = util.pathprefix2dict(self.tmp, required=["f1", "f2"])
         self.assertEqual(dirdata, ret)
 
     def test_required_missing(self):
-        dirdata = {'f1': b'f1content'}
+        dirdata = {"f1": b"f1content"}
         populate_dir(self.tmp, dirdata)
-        kwargs = {'required': ['f1', 'f2']}
+        kwargs = {"required": ["f1", "f2"]}
         self.assertRaises(ValueError, util.pathprefix2dict, self.tmp, **kwargs)
 
     def test_no_required_and_optional(self):
-        dirdata = {'f1': b'f1c', 'f2': b'f2c'}
+        dirdata = {"f1": b"f1c", "f2": b"f2c"}
         populate_dir(self.tmp, dirdata)
 
-        ret = util.pathprefix2dict(self.tmp, required=None,
-                                   optional=['f1', 'f2'])
+        ret = util.pathprefix2dict(
+            self.tmp, required=None, optional=["f1", "f2"]
+        )
         self.assertEqual(dirdata, ret)
 
     def test_required_and_optional(self):
-        dirdata = {'f1': b'f1c', 'f2': b'f2c'}
+        dirdata = {"f1": b"f1c", "f2": b"f2c"}
         populate_dir(self.tmp, dirdata)
 
-        ret = util.pathprefix2dict(self.tmp, required=['f1'], optional=['f2'])
+        ret = util.pathprefix2dict(self.tmp, required=["f1"], optional=["f2"])
         self.assertEqual(dirdata, ret)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_registry.py b/tests/unittests/test_registry.py
index 4c7df186..28ee04ec 100644
--- a/tests/unittests/test_registry.py
+++ b/tests/unittests/test_registry.py
@@ -1,32 +1,33 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 from cloudinit.registry import DictRegistry
-
-from tests.unittests.helpers import (mock, TestCase)
+from tests.unittests.helpers import TestCase, mock
 
 
 class TestDictRegistry(TestCase):
-
     def test_added_item_included_in_output(self):
         registry = DictRegistry()
-        item_key, item_to_register = 'test_key', mock.Mock()
+        item_key, item_to_register = "test_key", mock.Mock()
         registry.register_item(item_key, item_to_register)
-        self.assertEqual({item_key: item_to_register},
-                         registry.registered_items)
+        self.assertEqual(
+            {item_key: item_to_register}, registry.registered_items
+        )
 
     def test_registry_starts_out_empty(self):
         self.assertEqual({}, DictRegistry().registered_items)
 
     def test_modifying_registered_items_isnt_exposed_to_other_callers(self):
         registry = DictRegistry()
-        registry.registered_items['test_item'] = mock.Mock()
+        registry.registered_items["test_item"] = mock.Mock()
         self.assertEqual({}, registry.registered_items)
 
     def test_keys_cannot_be_replaced(self):
         registry = DictRegistry()
-        item_key = 'test_key'
+        item_key = "test_key"
         registry.register_item(item_key, mock.Mock())
-        self.assertRaises(ValueError,
-                          registry.register_item, item_key, mock.Mock())
+        self.assertRaises(
+            ValueError, registry.register_item, item_key, mock.Mock()
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_render_cloudcfg.py b/tests/unittests/test_render_cloudcfg.py
index b2222747..81110e61 100644
--- a/tests/unittests/test_render_cloudcfg.py
+++ b/tests/unittests/test_render_cloudcfg.py
@@ -4,57 +4,74 @@ import sys
 
 import pytest
 
-from cloudinit import subp
-from cloudinit import util
+from cloudinit import subp, util
 from tests.unittests.helpers import cloud_init_project_dir
 
 # TODO(Look to align with tools.render-cloudcfg or cloudinit.distos.OSFAMILIES)
-DISTRO_VARIANTS = ["amazon", "arch", "centos", "debian", "eurolinux", "fedora",
-                   "freebsd", "netbsd", "openbsd", "photon", "rhel", "suse",
-                   "ubuntu", "unknown"]
+DISTRO_VARIANTS = [
+    "amazon",
+    "arch",
+    "centos",
+    "debian",
+    "eurolinux",
+    "fedora",
+    "freebsd",
+    "netbsd",
+    "openbsd",
+    "photon",
+    "rhel",
+    "suse",
+    "ubuntu",
+    "unknown",
+]
 
 
 @pytest.mark.allow_subp_for(sys.executable)
 class TestRenderCloudCfg:
 
-    cmd = [sys.executable, cloud_init_project_dir('tools/render-cloudcfg')]
-    tmpl_path = cloud_init_project_dir('config/cloud.cfg.tmpl')
+    cmd = [sys.executable, cloud_init_project_dir("tools/render-cloudcfg")]
+    tmpl_path = cloud_init_project_dir("config/cloud.cfg.tmpl")
 
-    @pytest.mark.parametrize('variant', (DISTRO_VARIANTS))
+    @pytest.mark.parametrize("variant", (DISTRO_VARIANTS))
     def test_variant_sets_distro_in_cloud_cfg(self, variant, tmpdir):
-        outfile = tmpdir.join('outcfg').strpath
-        subp.subp(
-            self.cmd + ['--variant', variant, self.tmpl_path, outfile])
+        outfile = tmpdir.join("outcfg").strpath
+        subp.subp(self.cmd + ["--variant", variant, self.tmpl_path, outfile])
         with open(outfile) as stream:
             system_cfg = util.load_yaml(stream.read())
-        if variant == 'unknown':
-            variant = 'ubuntu'  # Unknown is defaulted to ubuntu
-        assert system_cfg['system_info']['distro'] == variant
+        if variant == "unknown":
+            variant = "ubuntu"  # Unknown is defaulted to ubuntu
+        assert system_cfg["system_info"]["distro"] == variant
 
-    @pytest.mark.parametrize('variant', (DISTRO_VARIANTS))
+    @pytest.mark.parametrize("variant", (DISTRO_VARIANTS))
     def test_variant_sets_default_user_in_cloud_cfg(self, variant, tmpdir):
-        outfile = tmpdir.join('outcfg').strpath
-        subp.subp(
-            self.cmd + ['--variant', variant, self.tmpl_path, outfile])
+        outfile = tmpdir.join("outcfg").strpath
+        subp.subp(self.cmd + ["--variant", variant, self.tmpl_path, outfile])
         with open(outfile) as stream:
             system_cfg = util.load_yaml(stream.read())
 
         default_user_exceptions = {
-            'amazon': 'ec2-user', 'debian': 'ubuntu', 'unknown': 'ubuntu'}
-        default_user = system_cfg['system_info']['default_user']['name']
+            "amazon": "ec2-user",
+            "debian": "ubuntu",
+            "unknown": "ubuntu",
+        }
+        default_user = system_cfg["system_info"]["default_user"]["name"]
         assert default_user == default_user_exceptions.get(variant, variant)
 
-    @pytest.mark.parametrize('variant,renderers', (
-        ('freebsd', ['freebsd']), ('netbsd', ['netbsd']),
-        ('openbsd', ['openbsd']), ('ubuntu', ['netplan', 'eni', 'sysconfig']))
+    @pytest.mark.parametrize(
+        "variant,renderers",
+        (
+            ("freebsd", ["freebsd"]),
+            ("netbsd", ["netbsd"]),
+            ("openbsd", ["openbsd"]),
+            ("ubuntu", ["netplan", "eni", "sysconfig"]),
+        ),
     )
     def test_variant_sets_network_renderer_priority_in_cloud_cfg(
         self, variant, renderers, tmpdir
     ):
-        outfile = tmpdir.join('outcfg').strpath
-        subp.subp(
-            self.cmd + ['--variant', variant, self.tmpl_path, outfile])
+        outfile = tmpdir.join("outcfg").strpath
+        subp.subp(self.cmd + ["--variant", variant, self.tmpl_path, outfile])
         with open(outfile) as stream:
             system_cfg = util.load_yaml(stream.read())
 
-        assert renderers == system_cfg['system_info']['network']['renderers']
+        assert renderers == system_cfg["system_info"]["network"]["renderers"]
diff --git a/tests/unittests/test_reporting.py b/tests/unittests/test_reporting.py
index 3aaeea43..f6dd96e0 100644
--- a/tests/unittests/test_reporting.py
+++ b/tests/unittests/test_reporting.py
@@ -5,273 +5,324 @@
 from unittest import mock
 
 from cloudinit import reporting
-from cloudinit.reporting import events
-from cloudinit.reporting import handlers
-
+from cloudinit.reporting import events, handlers
 from tests.unittests.helpers import TestCase
 
 
 def _fake_registry():
-    return mock.Mock(registered_items={'a': mock.MagicMock(),
-                                       'b': mock.MagicMock()})
+    return mock.Mock(
+        registered_items={"a": mock.MagicMock(), "b": mock.MagicMock()}
+    )
 
 
 class TestReportStartEvent(TestCase):
-
-    @mock.patch('cloudinit.reporting.events.instantiated_handler_registry',
-                new_callable=_fake_registry)
+    @mock.patch(
+        "cloudinit.reporting.events.instantiated_handler_registry",
+        new_callable=_fake_registry,
+    )
     def test_report_start_event_passes_something_with_as_string_to_handlers(
-            self, instantiated_handler_registry):
-        event_name, event_description = 'my_test_event', 'my description'
+        self, instantiated_handler_registry
+    ):
+        event_name, event_description = "my_test_event", "my description"
         events.report_start_event(event_name, event_description)
-        expected_string_representation = ': '.join(
-            ['start', event_name, event_description])
-        for _, handler in (
-                instantiated_handler_registry.registered_items.items()):
+        expected_string_representation = ": ".join(
+            ["start", event_name, event_description]
+        )
+        for (
+            _,
+            handler,
+        ) in instantiated_handler_registry.registered_items.items():
             self.assertEqual(1, handler.publish_event.call_count)
             event = handler.publish_event.call_args[0][0]
             self.assertEqual(expected_string_representation, event.as_string())
 
 
 class TestReportFinishEvent(TestCase):
-
     def _report_finish_event(self, result=events.status.SUCCESS):
-        event_name, event_description = 'my_test_event', 'my description'
+        event_name, event_description = "my_test_event", "my description"
         events.report_finish_event(
-            event_name, event_description, result=result)
+            event_name, event_description, result=result
+        )
         return event_name, event_description
 
     def assertHandlersPassedObjectWithAsString(
-            self, handlers, expected_as_string):
+        self, handlers, expected_as_string
+    ):
         for _, handler in handlers.items():
             self.assertEqual(1, handler.publish_event.call_count)
             event = handler.publish_event.call_args[0][0]
             self.assertEqual(expected_as_string, event.as_string())
 
-    @mock.patch('cloudinit.reporting.events.instantiated_handler_registry',
-                new_callable=_fake_registry)
+    @mock.patch(
+        "cloudinit.reporting.events.instantiated_handler_registry",
+        new_callable=_fake_registry,
+    )
     def test_report_finish_event_passes_something_with_as_string_to_handlers(
-            self, instantiated_handler_registry):
+        self, instantiated_handler_registry
+    ):
         event_name, event_description = self._report_finish_event()
-        expected_string_representation = ': '.join(
-            ['finish', event_name, events.status.SUCCESS,
-             event_description])
+        expected_string_representation = ": ".join(
+            ["finish", event_name, events.status.SUCCESS, event_description]
+        )
         self.assertHandlersPassedObjectWithAsString(
             instantiated_handler_registry.registered_items,
-            expected_string_representation)
+            expected_string_representation,
+        )
 
-    @mock.patch('cloudinit.reporting.events.instantiated_handler_registry',
-                new_callable=_fake_registry)
+    @mock.patch(
+        "cloudinit.reporting.events.instantiated_handler_registry",
+        new_callable=_fake_registry,
+    )
     def test_reporting_successful_finish_has_sensible_string_repr(
-            self, instantiated_handler_registry):
+        self, instantiated_handler_registry
+    ):
         event_name, event_description = self._report_finish_event(
-            result=events.status.SUCCESS)
-        expected_string_representation = ': '.join(
-            ['finish', event_name, events.status.SUCCESS,
-             event_description])
+            result=events.status.SUCCESS
+        )
+        expected_string_representation = ": ".join(
+            ["finish", event_name, events.status.SUCCESS, event_description]
+        )
         self.assertHandlersPassedObjectWithAsString(
             instantiated_handler_registry.registered_items,
-            expected_string_representation)
+            expected_string_representation,
+        )
 
-    @mock.patch('cloudinit.reporting.events.instantiated_handler_registry',
-                new_callable=_fake_registry)
+    @mock.patch(
+        "cloudinit.reporting.events.instantiated_handler_registry",
+        new_callable=_fake_registry,
+    )
     def test_reporting_unsuccessful_finish_has_sensible_string_repr(
-            self, instantiated_handler_registry):
+        self, instantiated_handler_registry
+    ):
         event_name, event_description = self._report_finish_event(
-            result=events.status.FAIL)
-        expected_string_representation = ': '.join(
-            ['finish', event_name, events.status.FAIL, event_description])
+            result=events.status.FAIL
+        )
+        expected_string_representation = ": ".join(
+            ["finish", event_name, events.status.FAIL, event_description]
+        )
         self.assertHandlersPassedObjectWithAsString(
             instantiated_handler_registry.registered_items,
-            expected_string_representation)
+            expected_string_representation,
+        )
 
     def test_invalid_result_raises_attribute_error(self):
         self.assertRaises(ValueError, self._report_finish_event, ("BOGUS",))
 
 
 class TestReportingEvent(TestCase):
-
     def test_as_string(self):
-        event_type, name, description = 'test_type', 'test_name', 'test_desc'
+        event_type, name, description = "test_type", "test_name", "test_desc"
         event = events.ReportingEvent(event_type, name, description)
-        expected_string_representation = ': '.join(
-            [event_type, name, description])
+        expected_string_representation = ": ".join(
+            [event_type, name, description]
+        )
         self.assertEqual(expected_string_representation, event.as_string())
 
     def test_as_dict(self):
-        event_type, name, desc = 'test_type', 'test_name', 'test_desc'
+        event_type, name, desc = "test_type", "test_name", "test_desc"
         event = events.ReportingEvent(event_type, name, desc)
-        expected = {'event_type': event_type, 'name': name,
-                    'description': desc, 'origin': 'cloudinit'}
+        expected = {
+            "event_type": event_type,
+            "name": name,
+            "description": desc,
+            "origin": "cloudinit",
+        }
 
         # allow for timestamp to differ, but must be present
         as_dict = event.as_dict()
-        self.assertIn('timestamp', as_dict)
-        del as_dict['timestamp']
+        self.assertIn("timestamp", as_dict)
+        del as_dict["timestamp"]
 
         self.assertEqual(expected, as_dict)
 
 
 class TestFinishReportingEvent(TestCase):
-
     def test_as_has_result(self):
         result = events.status.SUCCESS
-        name, desc = 'test_name', 'test_desc'
+        name, desc = "test_name", "test_desc"
         event = events.FinishReportingEvent(name, desc, result)
         ret = event.as_dict()
-        self.assertTrue('result' in ret)
-        self.assertEqual(ret['result'], result)
+        self.assertTrue("result" in ret)
+        self.assertEqual(ret["result"], result)
 
     def test_has_result_with_optional_post_files(self):
         result = events.status.SUCCESS
-        name, desc, files = 'test_name', 'test_desc', [
-            '/really/fake/path/install.log']
+        name, desc, files = (
+            "test_name",
+            "test_desc",
+            ["/really/fake/path/install.log"],
+        )
         event = events.FinishReportingEvent(
-            name, desc, result, post_files=files)
+            name, desc, result, post_files=files
+        )
         ret = event.as_dict()
-        self.assertTrue('result' in ret)
-        self.assertTrue('files' in ret)
-        self.assertEqual(ret['result'], result)
-        posted_install_log = ret['files'][0]
-        self.assertTrue('path' in posted_install_log)
-        self.assertTrue('content' in posted_install_log)
-        self.assertTrue('encoding' in posted_install_log)
-        self.assertEqual(posted_install_log['path'], files[0])
-        self.assertEqual(posted_install_log['encoding'], 'base64')
+        self.assertTrue("result" in ret)
+        self.assertTrue("files" in ret)
+        self.assertEqual(ret["result"], result)
+        posted_install_log = ret["files"][0]
+        self.assertTrue("path" in posted_install_log)
+        self.assertTrue("content" in posted_install_log)
+        self.assertTrue("encoding" in posted_install_log)
+        self.assertEqual(posted_install_log["path"], files[0])
+        self.assertEqual(posted_install_log["encoding"], "base64")
 
 
 class TestBaseReportingHandler(TestCase):
-
     def test_base_reporting_handler_is_abstract(self):
         regexp = r".*abstract.*publish_event.*"
         self.assertRaisesRegex(TypeError, regexp, handlers.ReportingHandler)
 
 
 class TestLogHandler(TestCase):
-
-    @mock.patch.object(reporting.handlers.logging, 'getLogger')
+    @mock.patch.object(reporting.handlers.logging, "getLogger")
     def test_appropriate_logger_used(self, getLogger):
-        event_type, event_name = 'test_type', 'test_name'
-        event = events.ReportingEvent(event_type, event_name, 'description')
+        event_type, event_name = "test_type", "test_name"
+        event = events.ReportingEvent(event_type, event_name, "description")
         reporting.handlers.LogHandler().publish_event(event)
         self.assertEqual(
-            [mock.call(
-                'cloudinit.reporting.{0}.{1}'.format(event_type, event_name))],
-            getLogger.call_args_list)
-
-    @mock.patch.object(reporting.handlers.logging, 'getLogger')
+            [
+                mock.call(
+                    "cloudinit.reporting.{0}.{1}".format(
+                        event_type, event_name
+                    )
+                )
+            ],
+            getLogger.call_args_list,
+        )
+
+    @mock.patch.object(reporting.handlers.logging, "getLogger")
     def test_single_log_message_at_info_published(self, getLogger):
-        event = events.ReportingEvent('type', 'name', 'description')
+        event = events.ReportingEvent("type", "name", "description")
         reporting.handlers.LogHandler().publish_event(event)
         self.assertEqual(1, getLogger.return_value.log.call_count)
 
-    @mock.patch.object(reporting.handlers.logging, 'getLogger')
+    @mock.patch.object(reporting.handlers.logging, "getLogger")
     def test_log_message_uses_event_as_string(self, getLogger):
-        event = events.ReportingEvent('type', 'name', 'description')
+        event = events.ReportingEvent("type", "name", "description")
         reporting.handlers.LogHandler(level="INFO").publish_event(event)
-        self.assertIn(event.as_string(),
-                      getLogger.return_value.log.call_args[0][1])
+        self.assertIn(
+            event.as_string(), getLogger.return_value.log.call_args[0][1]
+        )
 
 
 class TestDefaultRegisteredHandler(TestCase):
-
     def test_log_handler_registered_by_default(self):
         registered_items = (
-            reporting.instantiated_handler_registry.registered_items)
+            reporting.instantiated_handler_registry.registered_items
+        )
         for _, item in registered_items.items():
             if isinstance(item, reporting.handlers.LogHandler):
                 break
         else:
-            self.fail('No reporting LogHandler registered by default.')
+            self.fail("No reporting LogHandler registered by default.")
 
 
 class TestReportingConfiguration(TestCase):
-
-    @mock.patch.object(reporting, 'instantiated_handler_registry')
+    @mock.patch.object(reporting, "instantiated_handler_registry")
     def test_empty_configuration_doesnt_add_handlers(
-            self, instantiated_handler_registry):
+        self, instantiated_handler_registry
+    ):
         reporting.update_configuration({})
         self.assertEqual(
-            0, instantiated_handler_registry.register_item.call_count)
+            0, instantiated_handler_registry.register_item.call_count
+        )
 
     @mock.patch.object(
-        reporting, 'instantiated_handler_registry', reporting.DictRegistry())
-    @mock.patch.object(reporting, 'available_handlers')
+        reporting, "instantiated_handler_registry", reporting.DictRegistry()
+    )
+    @mock.patch.object(reporting, "available_handlers")
     def test_looks_up_handler_by_type_and_adds_it(self, available_handlers):
-        handler_type_name = 'test_handler'
+        handler_type_name = "test_handler"
         handler_cls = mock.Mock()
         available_handlers.registered_items = {handler_type_name: handler_cls}
-        handler_name = 'my_test_handler'
+        handler_name = "my_test_handler"
         reporting.update_configuration(
-            {handler_name: {'type': handler_type_name}})
+            {handler_name: {"type": handler_type_name}}
+        )
         self.assertEqual(
             {handler_name: handler_cls.return_value},
-            reporting.instantiated_handler_registry.registered_items)
+            reporting.instantiated_handler_registry.registered_items,
+        )
 
     @mock.patch.object(
-        reporting, 'instantiated_handler_registry', reporting.DictRegistry())
-    @mock.patch.object(reporting, 'available_handlers')
+        reporting, "instantiated_handler_registry", reporting.DictRegistry()
+    )
+    @mock.patch.object(reporting, "available_handlers")
     def test_uses_non_type_parts_of_config_dict_as_kwargs(
-            self, available_handlers):
-        handler_type_name = 'test_handler'
+        self, available_handlers
+    ):
+        handler_type_name = "test_handler"
         handler_cls = mock.Mock()
         available_handlers.registered_items = {handler_type_name: handler_cls}
-        extra_kwargs = {'foo': 'bar', 'bar': 'baz'}
+        extra_kwargs = {"foo": "bar", "bar": "baz"}
         handler_config = extra_kwargs.copy()
-        handler_config.update({'type': handler_type_name})
-        handler_name = 'my_test_handler'
+        handler_config.update({"type": handler_type_name})
+        handler_name = "my_test_handler"
         reporting.update_configuration({handler_name: handler_config})
         self.assertEqual(
             handler_cls.return_value,
             reporting.instantiated_handler_registry.registered_items[
-                handler_name])
-        self.assertEqual([mock.call(**extra_kwargs)],
-                         handler_cls.call_args_list)
+                handler_name
+            ],
+        )
+        self.assertEqual(
+            [mock.call(**extra_kwargs)], handler_cls.call_args_list
+        )
 
     @mock.patch.object(
-        reporting, 'instantiated_handler_registry', reporting.DictRegistry())
-    @mock.patch.object(reporting, 'available_handlers')
+        reporting, "instantiated_handler_registry", reporting.DictRegistry()
+    )
+    @mock.patch.object(reporting, "available_handlers")
     def test_handler_config_not_modified(self, available_handlers):
-        handler_type_name = 'test_handler'
+        handler_type_name = "test_handler"
         handler_cls = mock.Mock()
         available_handlers.registered_items = {handler_type_name: handler_cls}
-        handler_config = {'type': handler_type_name, 'foo': 'bar'}
+        handler_config = {"type": handler_type_name, "foo": "bar"}
         expected_handler_config = handler_config.copy()
-        reporting.update_configuration({'my_test_handler': handler_config})
+        reporting.update_configuration({"my_test_handler": handler_config})
         self.assertEqual(expected_handler_config, handler_config)
 
     @mock.patch.object(
-        reporting, 'instantiated_handler_registry', reporting.DictRegistry())
-    @mock.patch.object(reporting, 'available_handlers')
+        reporting, "instantiated_handler_registry", reporting.DictRegistry()
+    )
+    @mock.patch.object(reporting, "available_handlers")
     def test_handlers_removed_if_falseish_specified(self, available_handlers):
-        handler_type_name = 'test_handler'
+        handler_type_name = "test_handler"
         handler_cls = mock.Mock()
         available_handlers.registered_items = {handler_type_name: handler_cls}
-        handler_name = 'my_test_handler'
+        handler_name = "my_test_handler"
         reporting.update_configuration(
-            {handler_name: {'type': handler_type_name}})
+            {handler_name: {"type": handler_type_name}}
+        )
         self.assertEqual(
-            1, len(reporting.instantiated_handler_registry.registered_items))
+            1, len(reporting.instantiated_handler_registry.registered_items)
+        )
         reporting.update_configuration({handler_name: None})
         self.assertEqual(
-            0, len(reporting.instantiated_handler_registry.registered_items))
+            0, len(reporting.instantiated_handler_registry.registered_items)
+        )
 
 
 class TestReportingEventStack(TestCase):
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
-    @mock.patch('cloudinit.reporting.events.report_start_event')
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
+    @mock.patch("cloudinit.reporting.events.report_start_event")
     def test_start_and_finish_success(self, report_start, report_finish):
         with events.ReportEventStack(name="myname", description="mydesc"):
             pass
         self.assertEqual(
-            [mock.call('myname', 'mydesc')], report_start.call_args_list)
+            [mock.call("myname", "mydesc")], report_start.call_args_list
+        )
         self.assertEqual(
-            [mock.call('myname', 'mydesc', events.status.SUCCESS,
-                       post_files=[])],
-            report_finish.call_args_list)
-
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
-    @mock.patch('cloudinit.reporting.events.report_start_event')
+            [
+                mock.call(
+                    "myname", "mydesc", events.status.SUCCESS, post_files=[]
+                )
+            ],
+            report_finish.call_args_list,
+        )
+
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
+    @mock.patch("cloudinit.reporting.events.report_start_event")
     def test_finish_exception_defaults_fail(self, report_start, report_finish):
         name = "myname"
         desc = "mydesc"
@@ -283,31 +334,34 @@ class TestReportingEventStack(TestCase):
         self.assertEqual([mock.call(name, desc)], report_start.call_args_list)
         self.assertEqual(
             [mock.call(name, desc, events.status.FAIL, post_files=[])],
-            report_finish.call_args_list)
+            report_finish.call_args_list,
+        )
 
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
-    @mock.patch('cloudinit.reporting.events.report_start_event')
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
+    @mock.patch("cloudinit.reporting.events.report_start_event")
     def test_result_on_exception_used(self, report_start, report_finish):
         name = "myname"
         desc = "mydesc"
         try:
             with events.ReportEventStack(
-                    name, desc, result_on_exception=events.status.WARN):
+                name, desc, result_on_exception=events.status.WARN
+            ):
                 raise ValueError("This didnt work")
         except ValueError:
             pass
         self.assertEqual([mock.call(name, desc)], report_start.call_args_list)
         self.assertEqual(
             [mock.call(name, desc, events.status.WARN, post_files=[])],
-            report_finish.call_args_list)
+            report_finish.call_args_list,
+        )
 
-    @mock.patch('cloudinit.reporting.events.report_start_event')
+    @mock.patch("cloudinit.reporting.events.report_start_event")
     def test_child_fullname_respects_parent(self, report_start):
         parent_name = "topname"
         c1_name = "c1name"
         c2_name = "c2name"
-        c2_expected_fullname = '/'.join([parent_name, c1_name, c2_name])
-        c1_expected_fullname = '/'.join([parent_name, c1_name])
+        c2_expected_fullname = "/".join([parent_name, c1_name, c2_name])
+        c1_expected_fullname = "/".join([parent_name, c1_name])
 
         parent = events.ReportEventStack(parent_name, "topdesc")
         c1 = events.ReportEventStack(c1_name, "c1desc", parent=parent)
@@ -317,8 +371,8 @@ class TestReportingEventStack(TestCase):
             with c2:
                 report_start.assert_called_with(c2_expected_fullname, "c2desc")
 
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
-    @mock.patch('cloudinit.reporting.events.report_start_event')
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
+    @mock.patch("cloudinit.reporting.events.report_start_event")
     def test_child_result_bubbles_up(self, report_start, report_finish):
         parent = events.ReportEventStack("topname", "topdesc")
         child = events.ReportEventStack("c_name", "c_desc", parent=parent)
@@ -327,42 +381,53 @@ class TestReportingEventStack(TestCase):
                 child.result = events.status.WARN
 
         report_finish.assert_called_with(
-            "topname", "topdesc", events.status.WARN, post_files=[])
+            "topname", "topdesc", events.status.WARN, post_files=[]
+        )
 
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
     def test_message_used_in_finish(self, report_finish):
-        with events.ReportEventStack("myname", "mydesc",
-                                     message="mymessage"):
+        with events.ReportEventStack("myname", "mydesc", message="mymessage"):
             pass
         self.assertEqual(
-            [mock.call("myname", "mymessage", events.status.SUCCESS,
-                       post_files=[])],
-            report_finish.call_args_list)
-
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
+            [
+                mock.call(
+                    "myname", "mymessage", events.status.SUCCESS, post_files=[]
+                )
+            ],
+            report_finish.call_args_list,
+        )
+
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
     def test_message_updatable(self, report_finish):
         with events.ReportEventStack("myname", "mydesc") as c:
             c.message = "all good"
         self.assertEqual(
-            [mock.call("myname", "all good", events.status.SUCCESS,
-                       post_files=[])],
-            report_finish.call_args_list)
-
-    @mock.patch('cloudinit.reporting.events.report_start_event')
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
+            [
+                mock.call(
+                    "myname", "all good", events.status.SUCCESS, post_files=[]
+                )
+            ],
+            report_finish.call_args_list,
+        )
+
+    @mock.patch("cloudinit.reporting.events.report_start_event")
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
     def test_reporting_disabled_does_not_report_events(
-            self, report_start, report_finish):
+        self, report_start, report_finish
+    ):
         with events.ReportEventStack("a", "b", reporting_enabled=False):
             pass
         self.assertEqual(report_start.call_count, 0)
         self.assertEqual(report_finish.call_count, 0)
 
-    @mock.patch('cloudinit.reporting.events.report_start_event')
-    @mock.patch('cloudinit.reporting.events.report_finish_event')
+    @mock.patch("cloudinit.reporting.events.report_start_event")
+    @mock.patch("cloudinit.reporting.events.report_finish_event")
     def test_reporting_child_default_to_parent(
-            self, report_start, report_finish):
+        self, report_start, report_finish
+    ):
         parent = events.ReportEventStack(
-            "pname", "pdesc", reporting_enabled=False)
+            "pname", "pdesc", reporting_enabled=False
+        )
         child = events.ReportEventStack("cname", "cdesc", parent=parent)
         with parent:
             with child:
@@ -371,8 +436,9 @@ class TestReportingEventStack(TestCase):
         self.assertEqual(report_finish.call_count, 0)
 
     def test_reporting_event_has_sane_repr(self):
-        myrep = events.ReportEventStack("fooname", "foodesc",
-                                        reporting_enabled=True).__repr__()
+        myrep = events.ReportEventStack(
+            "fooname", "foodesc", reporting_enabled=True
+        ).__repr__()
         self.assertIn("fooname", myrep)
         self.assertIn("foodesc", myrep)
         self.assertIn("True", myrep)
@@ -386,4 +452,5 @@ class TestStatusAccess(TestCase):
     def test_invalid_status_access_raises_value_error(self):
         self.assertRaises(AttributeError, getattr, events.status, "BOGUS")
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_reporting_hyperv.py b/tests/unittests/test_reporting_hyperv.py
index 24a1dcc7..35ab0c58 100644
--- a/tests/unittests/test_reporting_hyperv.py
+++ b/tests/unittests/test_reporting_hyperv.py
@@ -1,27 +1,25 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 import base64
-import zlib
-
-from cloudinit.reporting import events, instantiated_handler_registry
-from cloudinit.reporting.handlers import HyperVKvpReportingHandler, LogHandler
-
 import json
 import os
+import re
 import struct
 import time
-import re
+import zlib
 from unittest import mock
 
 from cloudinit import util
-from tests.unittests.helpers import CiTestCase
+from cloudinit.reporting import events, instantiated_handler_registry
+from cloudinit.reporting.handlers import HyperVKvpReportingHandler, LogHandler
 from cloudinit.sources.helpers import azure
+from tests.unittests.helpers import CiTestCase
 
 
 class TestKvpEncoding(CiTestCase):
     def test_encode_decode(self):
-        kvp = {'key': 'key1', 'value': 'value1'}
+        kvp = {"key": "key1", "value": "value1"}
         kvp_reporting = HyperVKvpReportingHandler()
-        data = kvp_reporting._encode_kvp_item(kvp['key'], kvp['value'])
+        data = kvp_reporting._encode_kvp_item(kvp["key"], kvp["value"])
         self.assertEqual(len(data), kvp_reporting.HV_KVP_RECORD_SIZE)
         decoded_kvp = kvp_reporting._decode_kvp_item(data)
         self.assertEqual(kvp, decoded_kvp)
@@ -30,71 +28,72 @@ class TestKvpEncoding(CiTestCase):
 class TextKvpReporter(CiTestCase):
     def setUp(self):
         super(TextKvpReporter, self).setUp()
-        self.tmp_file_path = self.tmp_path('kvp_pool_file')
+        self.tmp_file_path = self.tmp_path("kvp_pool_file")
         util.ensure_file(self.tmp_file_path)
 
     def test_events_with_higher_incarnation_not_over_written(self):
-        reporter = HyperVKvpReportingHandler(
-            kvp_file_path=self.tmp_file_path)
+        reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         self.assertEqual(0, len(list(reporter._iterate_kvps(0))))
 
         reporter.publish_event(
-            events.ReportingEvent('foo', 'name1', 'description'))
+            events.ReportingEvent("foo", "name1", "description")
+        )
         reporter.publish_event(
-            events.ReportingEvent('foo', 'name2', 'description'))
+            events.ReportingEvent("foo", "name2", "description")
+        )
         reporter.q.join()
         self.assertEqual(2, len(list(reporter._iterate_kvps(0))))
 
-        reporter3 = HyperVKvpReportingHandler(
-            kvp_file_path=self.tmp_file_path)
+        reporter3 = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         reporter3.incarnation_no = reporter.incarnation_no - 1
         reporter3.publish_event(
-            events.ReportingEvent('foo', 'name3', 'description'))
+            events.ReportingEvent("foo", "name3", "description")
+        )
         reporter3.q.join()
         self.assertEqual(3, len(list(reporter3._iterate_kvps(0))))
 
     def test_finish_event_result_is_logged(self):
-        reporter = HyperVKvpReportingHandler(
-            kvp_file_path=self.tmp_file_path)
+        reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         reporter.publish_event(
-            events.FinishReportingEvent('name2', 'description1',
-                                        result=events.status.FAIL))
+            events.FinishReportingEvent(
+                "name2", "description1", result=events.status.FAIL
+            )
+        )
         reporter.q.join()
-        self.assertIn('FAIL', list(reporter._iterate_kvps(0))[0]['value'])
+        self.assertIn("FAIL", list(reporter._iterate_kvps(0))[0]["value"])
 
     def test_file_operation_issue(self):
         os.remove(self.tmp_file_path)
-        reporter = HyperVKvpReportingHandler(
-            kvp_file_path=self.tmp_file_path)
+        reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         reporter.publish_event(
-            events.FinishReportingEvent('name2', 'description1',
-                                        result=events.status.FAIL))
+            events.FinishReportingEvent(
+                "name2", "description1", result=events.status.FAIL
+            )
+        )
         reporter.q.join()
 
     def test_event_very_long(self):
-        reporter = HyperVKvpReportingHandler(
-            kvp_file_path=self.tmp_file_path)
-        description = 'ab' * reporter.HV_KVP_AZURE_MAX_VALUE_SIZE
+        reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
+        description = "ab" * reporter.HV_KVP_AZURE_MAX_VALUE_SIZE
         long_event = events.FinishReportingEvent(
-            'event_name',
-            description,
-            result=events.status.FAIL)
+            "event_name", description, result=events.status.FAIL
+        )
         reporter.publish_event(long_event)
         reporter.q.join()
         kvps = list(reporter._iterate_kvps(0))
         self.assertEqual(3, len(kvps))
 
         # restore from the kvp to see the content are all there
-        full_description = ''
+        full_description = ""
         for i in range(len(kvps)):
-            msg_slice = json.loads(kvps[i]['value'])
-            self.assertEqual(msg_slice['msg_i'], i)
-            full_description += msg_slice['msg']
+            msg_slice = json.loads(kvps[i]["value"])
+            self.assertEqual(msg_slice["msg_i"], i)
+            full_description += msg_slice["msg"]
         self.assertEqual(description, full_description)
 
     def test_not_truncate_kvp_file_modified_after_boot(self):
         with open(self.tmp_file_path, "wb+") as f:
-            kvp = {'key': 'key1', 'value': 'value1'}
+            kvp = {"key": "key1", "value": "value1"}
             data = struct.pack(
                 "%ds%ds"
                 % (
@@ -118,11 +117,16 @@ class TextKvpReporter(CiTestCase):
 
     def test_truncate_stale_kvp_file(self):
         with open(self.tmp_file_path, "wb+") as f:
-            kvp = {'key': 'key1', 'value': 'value1'}
-            data = (struct.pack("%ds%ds" % (
-                HyperVKvpReportingHandler.HV_KVP_EXCHANGE_MAX_KEY_SIZE,
-                HyperVKvpReportingHandler.HV_KVP_EXCHANGE_MAX_VALUE_SIZE),
-                kvp['key'].encode('utf-8'), kvp['value'].encode('utf-8')))
+            kvp = {"key": "key1", "value": "value1"}
+            data = struct.pack(
+                "%ds%ds"
+                % (
+                    HyperVKvpReportingHandler.HV_KVP_EXCHANGE_MAX_KEY_SIZE,
+                    HyperVKvpReportingHandler.HV_KVP_EXCHANGE_MAX_VALUE_SIZE,
+                ),
+                kvp["key"].encode("utf-8"),
+                kvp["value"].encode("utf-8"),
+            )
             f.write(data)
 
         # set the time ways back to make it look like
@@ -137,8 +141,8 @@ class TextKvpReporter(CiTestCase):
         kvps = list(reporter._iterate_kvps(0))
         self.assertEqual(0, len(kvps))
 
-    @mock.patch('cloudinit.distros.uses_systemd')
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.distros.uses_systemd")
+    @mock.patch("cloudinit.subp.subp")
     def test_get_boot_telemetry(self, m_subp, m_sysd):
         reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         datetime_pattern = (
@@ -149,8 +153,9 @@ class TextKvpReporter(CiTestCase):
         # get_boot_telemetry makes two subp calls to systemctl. We provide
         # a list of values that the subp calls should return
         m_subp.side_effect = [
-            ('UserspaceTimestampMonotonic=1844838', ''),
-            ('InactiveExitTimestampMonotonic=3068203', '')]
+            ("UserspaceTimestampMonotonic=1844838", ""),
+            ("InactiveExitTimestampMonotonic=3068203", ""),
+        ]
         m_sysd.return_value = True
 
         reporter.publish_event(azure.get_boot_telemetry())
@@ -158,15 +163,13 @@ class TextKvpReporter(CiTestCase):
         kvps = list(reporter._iterate_kvps(0))
         self.assertEqual(1, len(kvps))
 
-        evt_msg = kvps[0]['value']
+        evt_msg = kvps[0]["value"]
         if not re.search("kernel_start=" + datetime_pattern, evt_msg):
             raise AssertionError("missing kernel_start timestamp")
         if not re.search("user_start=" + datetime_pattern, evt_msg):
             raise AssertionError("missing user_start timestamp")
-        if not re.search("cloudinit_activation=" + datetime_pattern,
-                         evt_msg):
-            raise AssertionError(
-                "missing cloudinit_activation timestamp")
+        if not re.search("cloudinit_activation=" + datetime_pattern, evt_msg):
+            raise AssertionError("missing cloudinit_activation timestamp")
 
     def test_get_system_info(self):
         reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
@@ -176,7 +179,7 @@ class TextKvpReporter(CiTestCase):
         reporter.q.join()
         kvps = list(reporter._iterate_kvps(0))
         self.assertEqual(1, len(kvps))
-        evt_msg = kvps[0]['value']
+        evt_msg = kvps[0]["value"]
 
         # the most important information is cloudinit version,
         # kernel_version, and the distro variant. It is ok if
@@ -191,12 +194,11 @@ class TextKvpReporter(CiTestCase):
     def test_report_diagnostic_event_without_logger_func(self):
         reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         diagnostic_msg = "test_diagnostic"
-        reporter.publish_event(
-            azure.report_diagnostic_event(diagnostic_msg))
+        reporter.publish_event(azure.report_diagnostic_event(diagnostic_msg))
         reporter.q.join()
         kvps = list(reporter._iterate_kvps(0))
         self.assertEqual(1, len(kvps))
-        evt_msg = kvps[0]['value']
+        evt_msg = kvps[0]["value"]
 
         if diagnostic_msg not in evt_msg:
             raise AssertionError("missing expected diagnostic message")
@@ -206,12 +208,14 @@ class TextKvpReporter(CiTestCase):
         logger_func = mock.MagicMock()
         diagnostic_msg = "test_diagnostic"
         reporter.publish_event(
-            azure.report_diagnostic_event(diagnostic_msg,
-                                          logger_func=logger_func))
+            azure.report_diagnostic_event(
+                diagnostic_msg, logger_func=logger_func
+            )
+        )
         reporter.q.join()
         kvps = list(reporter._iterate_kvps(0))
         self.assertEqual(1, len(kvps))
-        evt_msg = kvps[0]['value']
+        evt_msg = kvps[0]["value"]
 
         if diagnostic_msg not in evt_msg:
             raise AssertionError("missing expected diagnostic message")
@@ -221,18 +225,18 @@ class TextKvpReporter(CiTestCase):
         reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         try:
             instantiated_handler_registry.register_item("telemetry", reporter)
-            event_desc = b'test_compressed'
-            azure.report_compressed_event(
-                "compressed event", event_desc)
+            event_desc = b"test_compressed"
+            azure.report_compressed_event("compressed event", event_desc)
 
             self.validate_compressed_kvps(reporter, 1, [event_desc])
         finally:
-            instantiated_handler_registry.unregister_item("telemetry",
-                                                          force=False)
+            instantiated_handler_registry.unregister_item(
+                "telemetry", force=False
+            )
 
-    @mock.patch('cloudinit.sources.helpers.azure.report_compressed_event')
-    @mock.patch('cloudinit.sources.helpers.azure.report_diagnostic_event')
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.sources.helpers.azure.report_compressed_event")
+    @mock.patch("cloudinit.sources.helpers.azure.report_diagnostic_event")
+    @mock.patch("cloudinit.subp.subp")
     def test_push_log_to_kvp_exception_handling(self, m_subp, m_diag, m_com):
         reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         try:
@@ -240,7 +244,8 @@ class TextKvpReporter(CiTestCase):
             log_file = self.tmp_path("cloud-init.log")
             azure.MAX_LOG_TO_KVP_LENGTH = 100
             azure.LOG_PUSHED_TO_KVP_INDEX_FILE = self.tmp_path(
-                'log_pushed_to_kvp')
+                "log_pushed_to_kvp"
+            )
             with open(log_file, "w") as f:
                 log_content = "A" * 50 + "B" * 100
                 f.write(log_content)
@@ -251,11 +256,12 @@ class TextKvpReporter(CiTestCase):
             # exceptions will trigger diagnostic reporting calls
             self.assertEqual(m_diag.call_count, 3)
         finally:
-            instantiated_handler_registry.unregister_item("telemetry",
-                                                          force=False)
+            instantiated_handler_registry.unregister_item(
+                "telemetry", force=False
+            )
 
-    @mock.patch('cloudinit.subp.subp')
-    @mock.patch.object(LogHandler, 'publish_event')
+    @mock.patch("cloudinit.subp.subp")
+    @mock.patch.object(LogHandler, "publish_event")
     def test_push_log_to_kvp(self, publish_event, m_subp):
         reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         try:
@@ -263,7 +269,8 @@ class TextKvpReporter(CiTestCase):
             log_file = self.tmp_path("cloud-init.log")
             azure.MAX_LOG_TO_KVP_LENGTH = 100
             azure.LOG_PUSHED_TO_KVP_INDEX_FILE = self.tmp_path(
-                'log_pushed_to_kvp')
+                "log_pushed_to_kvp"
+            )
             with open(log_file, "w") as f:
                 log_content = "A" * 50 + "B" * 100
                 f.write(log_content)
@@ -275,20 +282,25 @@ class TextKvpReporter(CiTestCase):
             azure.push_log_to_kvp(log_file)
 
             # make sure dmesg is called every time
-            m_subp.assert_called_with(
-                ['dmesg'], capture=True, decode=False)
+            m_subp.assert_called_with(["dmesg"], capture=True, decode=False)
 
             for call_arg in publish_event.call_args_list:
                 event = call_arg[0][0]
                 self.assertNotEqual(
-                    event.event_type, azure.COMPRESSED_EVENT_TYPE)
+                    event.event_type, azure.COMPRESSED_EVENT_TYPE
+                )
             self.validate_compressed_kvps(
-                reporter, 2,
-                [log_content[-azure.MAX_LOG_TO_KVP_LENGTH:].encode(),
-                 extra_content.encode()])
+                reporter,
+                2,
+                [
+                    log_content[-azure.MAX_LOG_TO_KVP_LENGTH :].encode(),
+                    extra_content.encode(),
+                ],
+            )
         finally:
-            instantiated_handler_registry.unregister_item("telemetry",
-                                                          force=False)
+            instantiated_handler_registry.unregister_item(
+                "telemetry", force=False
+            )
 
     def validate_compressed_kvps(self, reporter, count, values):
         reporter.q.join()
@@ -296,7 +308,7 @@ class TextKvpReporter(CiTestCase):
         compressed_count = 0
         for i in range(len(kvps)):
             kvp = kvps[i]
-            kvp_value = kvp['value']
+            kvp_value = kvp["value"]
             kvp_value_json = json.loads(kvp_value)
             evt_msg = kvp_value_json["msg"]
             evt_type = kvp_value_json["type"]
@@ -305,7 +317,8 @@ class TextKvpReporter(CiTestCase):
             evt_msg_json = json.loads(evt_msg)
             evt_encoding = evt_msg_json["encoding"]
             evt_data = zlib.decompress(
-                base64.decodebytes(evt_msg_json["data"].encode("ascii")))
+                base64.decodebytes(evt_msg_json["data"].encode("ascii"))
+            )
 
             self.assertLess(compressed_count, len(values))
             self.assertEqual(evt_data, values[compressed_count])
@@ -316,17 +329,21 @@ class TextKvpReporter(CiTestCase):
     def test_unique_kvp_key(self):
         reporter = HyperVKvpReportingHandler(kvp_file_path=self.tmp_file_path)
         evt1 = events.ReportingEvent(
-            "event_type", 'event_message',
-            "event_description")
+            "event_type", "event_message", "event_description"
+        )
         reporter.publish_event(evt1)
 
         evt2 = events.ReportingEvent(
-            "event_type", 'event_message',
-            "event_description", timestamp=evt1.timestamp + 1)
+            "event_type",
+            "event_message",
+            "event_description",
+            timestamp=evt1.timestamp + 1,
+        )
         reporter.publish_event(evt2)
 
         reporter.q.join()
         kvps = list(reporter._iterate_kvps(0))
         self.assertEqual(2, len(kvps))
-        self.assertNotEqual(kvps[0]["key"], kvps[1]["key"],
-                            "duplicate keys for KVP entries")
+        self.assertNotEqual(
+            kvps[0]["key"], kvps[1]["key"], "duplicate keys for KVP entries"
+        )
diff --git a/tests/unittests/test_simpletable.py b/tests/unittests/test_simpletable.py
index 69b30f0e..ee7eb0b4 100644
--- a/tests/unittests/test_simpletable.py
+++ b/tests/unittests/test_simpletable.py
@@ -13,14 +13,19 @@ from cloudinit.simpletable import SimpleTable
 from tests.unittests.helpers import CiTestCase
 
 # Examples rendered by cloud-init using PrettyTable
-NET_DEVICE_FIELDS = (
-    'Device', 'Up', 'Address', 'Mask', 'Scope', 'Hw-Address')
+NET_DEVICE_FIELDS = ("Device", "Up", "Address", "Mask", "Scope", "Hw-Address")
 NET_DEVICE_ROWS = (
-    ('ens3', True, '172.31.4.203', '255.255.240.0', '.', '0a:1f:07:15:98:70'),
-    ('ens3', True, 'fe80::81f:7ff:fe15:9870/64', '.', 'link',
-        '0a:1f:07:15:98:70'),
-    ('lo', True, '127.0.0.1', '255.0.0.0', '.', '.'),
-    ('lo', True, '::1/128', '.', 'host', '.'),
+    ("ens3", True, "172.31.4.203", "255.255.240.0", ".", "0a:1f:07:15:98:70"),
+    (
+        "ens3",
+        True,
+        "fe80::81f:7ff:fe15:9870/64",
+        ".",
+        "link",
+        "0a:1f:07:15:98:70",
+    ),
+    ("lo", True, "127.0.0.1", "255.0.0.0", ".", "."),
+    ("lo", True, "::1/128", ".", "host", "."),
 )
 NET_DEVICE_TABLE = """\
 +--------+------+----------------------------+---------------+-------+-------------------+
@@ -32,11 +37,17 @@ NET_DEVICE_TABLE = """\
 |   lo   | True |          ::1/128           |       .       |  host |         .         |
 +--------+------+----------------------------+---------------+-------+-------------------+"""  # noqa: E501
 ROUTE_IPV4_FIELDS = (
-    'Route', 'Destination', 'Gateway', 'Genmask', 'Interface', 'Flags')
+    "Route",
+    "Destination",
+    "Gateway",
+    "Genmask",
+    "Interface",
+    "Flags",
+)
 ROUTE_IPV4_ROWS = (
-    ('0', '0.0.0.0', '172.31.0.1', '0.0.0.0', 'ens3', 'UG'),
-    ('1', '169.254.0.0', '0.0.0.0', '255.255.0.0', 'ens3', 'U'),
-    ('2', '172.31.0.0', '0.0.0.0', '255.255.240.0', 'ens3', 'U'),
+    ("0", "0.0.0.0", "172.31.0.1", "0.0.0.0", "ens3", "UG"),
+    ("1", "169.254.0.0", "0.0.0.0", "255.255.0.0", "ens3", "U"),
+    ("2", "172.31.0.0", "0.0.0.0", "255.255.240.0", "ens3", "U"),
 )
 ROUTE_IPV4_TABLE = """\
 +-------+-------------+------------+---------------+-----------+-------+
@@ -47,11 +58,14 @@ ROUTE_IPV4_TABLE = """\
 |   2   |  172.31.0.0 |  0.0.0.0   | 255.255.240.0 |    ens3   |   U   |
 +-------+-------------+------------+---------------+-----------+-------+"""
 
-AUTHORIZED_KEYS_FIELDS = (
-    'Keytype', 'Fingerprint (md5)', 'Options', 'Comment')
+AUTHORIZED_KEYS_FIELDS = ("Keytype", "Fingerprint (md5)", "Options", "Comment")
 AUTHORIZED_KEYS_ROWS = (
-    ('ssh-rsa', '24:c7:41:49:47:12:31:a0:de:6f:62:79:9b:13:06:36', '-',
-        'ajorgens'),
+    (
+        "ssh-rsa",
+        "24:c7:41:49:47:12:31:a0:de:6f:62:79:9b:13:06:36",
+        "-",
+        "ajorgens",
+    ),
 )
 AUTHORIZED_KEYS_TABLE = """\
 +---------+-------------------------------------------------+---------+----------+
@@ -63,7 +77,7 @@ AUTHORIZED_KEYS_TABLE = """\
 # from prettytable import PrettyTable
 # pt = PrettyTable(('HEADER',))
 # print(pt)
-NO_ROWS_FIELDS = ('HEADER',)
+NO_ROWS_FIELDS = ("HEADER",)
 NO_ROWS_TABLE = """\
 +--------+
 | HEADER |
@@ -72,7 +86,6 @@ NO_ROWS_TABLE = """\
 
 
 class TestSimpleTable(CiTestCase):
-
     def test_no_rows(self):
         """An empty table is rendered as PrettyTable would have done it."""
         table = SimpleTable(NO_ROWS_FIELDS)
diff --git a/tests/unittests/test_sshutil.py b/tests/unittests/test_sshutil.py
index b210bd3b..d614350e 100644
--- a/tests/unittests/test_sshutil.py
+++ b/tests/unittests/test_sshutil.py
@@ -1,27 +1,29 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 import os
-
 from collections import namedtuple
 from functools import partial
 from unittest.mock import patch
 
-from cloudinit import ssh_util
+from cloudinit import ssh_util, util
 from tests.unittests import helpers as test_helpers
-from cloudinit import util
 
 # https://stackoverflow.com/questions/11351032/
-FakePwEnt = namedtuple('FakePwEnt', [
-    'pw_name',
-    'pw_passwd',
-    'pw_uid',
-    'pw_gid',
-    'pw_gecos',
-    'pw_dir',
-    'pw_shell',
-])
+FakePwEnt = namedtuple(
+    "FakePwEnt",
+    [
+        "pw_name",
+        "pw_passwd",
+        "pw_uid",
+        "pw_gid",
+        "pw_gecos",
+        "pw_dir",
+        "pw_shell",
+    ],
+)
 FakePwEnt.__new__.__defaults__ = tuple(
-    "UNSET_%s" % n for n in FakePwEnt._fields)
+    "UNSET_%s" % n for n in FakePwEnt._fields
+)
 
 
 def mock_get_owner(updated_permissions, value):
@@ -57,7 +59,7 @@ def mock_getpwnam(users, username):
 # the testdata for OpenSSH, and their private keys are available
 # https://github.com/openssh/openssh-portable/tree/master/regress/unittests/sshkey/testdata
 VALID_CONTENT = {
-    'dsa': (
+    "dsa": (
         "AAAAB3NzaC1kc3MAAACBAIrjOQSlSea19bExXBMBKBvcLhBoVvNBjCppNzllipF"
         "W4jgIOMcNanULRrZGjkOKat6MWJNetSbV1E6IOFDQ16rQgsh/OvYU9XhzM8seLa"
         "A21VszZuhIV7/2DE3vxu7B54zVzueG1O1Deq6goQCRGWBUnqO2yluJiG4HzrnDa"
@@ -69,12 +71,12 @@ VALID_CONTENT = {
         "JNDnIqDHxTkc6LY2vu8Y2pQ3/bVnllZZOda2oD5HQ7ovygQa6CH+fbaZHbdDUX/"
         "5z7u2rVAlDw=="
     ),
-    'ecdsa': (
+    "ecdsa": (
         "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBITrGBB3cgJ"
         "J7fPxvtMW9H3oRisNpJ3OAslxZeyP7I0A9BPAW0RQIwHVtVnM7zrp4nI+JLZov/"
         "Ql7lc2leWL7CY="
     ),
-    'rsa': (
+    "rsa": (
         "AAAAB3NzaC1yc2EAAAABIwAAAQEA3I7VUf2l5gSn5uavROsc5HRDpZdQueUq5oz"
         "emNSj8T7enqKHOEaFoU2VoPgGEWC9RyzSQVeyD6s7APMcE82EtmW4skVEgEGSbD"
         "c1pvxzxtchBj78hJP6Cf5TCMFSXw+Fz5rF1dR23QDbN1mkHs7adr8GW4kSWqU7Q"
@@ -82,11 +84,10 @@ VALID_CONTENT = {
         "YWpMfYdPUnE7u536WqzFmsaqJctz3gBxH9Ex7dFtrxR4qiqEr9Qtlu3xGn7Bw07"
         "/+i1D+ey3ONkZLN+LQ714cgj8fRS4Hj29SCmXp5Kt5/82cD/VN3NtHw=="
     ),
-    'ed25519': (
-        "AAAAC3NzaC1lZDI1NTE5AAAAIA1J77+CrJ8p6/vWCEzuylqJNMHUP/XmeYyGVWb"
-        "8lnDd"
+    "ed25519": (
+        "AAAAC3NzaC1lZDI1NTE5AAAAIA1J77+CrJ8p6/vWCEzuylqJNMHUP/XmeYyGVWb8lnDd"
     ),
-    'ecdsa-sha2-nistp256-cert-v01@openssh.com': (
+    "ecdsa-sha2-nistp256-cert-v01@openssh.com": (
         "AAAAKGVjZHNhLXNoYTItbmlzdHAyNTYtY2VydC12MDFAb3BlbnNzaC5jb20AAAA"
         "gQIfwT/+UX68/hlKsdKuaOuAVB6ftTg03SlP/uH4OBEwAAAAIbmlzdHAyNTYAAA"
         "BBBEjA0gjJmPM6La3sXyfNlnjilvvGY6I2M8SvJj4o3X/46wcUbPWTaj4RF3EXw"
@@ -101,12 +102,12 @@ VALID_CONTENT = {
         "2tM3QXkDcwdP0SxSEW5yy4XV5oAAAAhANNMm1cdVlAt3hmycQgdD82zPlg5YvVO"
         "iN0SQTbgVD8i"
     ),
-    'ecdsa-sha2-nistp256': (
+    "ecdsa-sha2-nistp256": (
         "AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBEjA0gjJmPM"
         "6La3sXyfNlnjilvvGY6I2M8SvJj4o3X/46wcUbPWTaj4RF3EXwHvNxplYBwdPlk"
         "2zEecvf9Cs2BM="
     ),
-    'ecdsa-sha2-nistp384-cert-v01@openssh.com': (
+    "ecdsa-sha2-nistp384-cert-v01@openssh.com": (
         "AAAAKGVjZHNhLXNoYTItbmlzdHAzODQtY2VydC12MDFAb3BlbnNzaC5jb20AAAA"
         "grnSvDsK1EnCZndO1IyGWcGkVgVSkPWi/XO2ybPFyLVUAAAAIbmlzdHAzODQAAA"
         "BhBAaYSQs+8TT0Tzciy0dorwhur6yzOGUrYQ6ueUQYWbE7eNdHmhsVrlpGPgSaY"
@@ -123,12 +124,12 @@ VALID_CONTENT = {
         "RVYqYQgAAADAiit0UCMDAUbjD+R2x4LvU3x/t8G3sdqDLRNfMRpjZpvcS8AwC+Y"
         "VFVSQNn0AyzW0="
     ),
-    'ecdsa-sha2-nistp384': (
+    "ecdsa-sha2-nistp384": (
         "AAAAE2VjZHNhLXNoYTItbmlzdHAzODQAAAAIbmlzdHAzODQAAABhBAaYSQs+8TT"
         "0Tzciy0dorwhur6yzOGUrYQ6ueUQYWbE7eNdHmhsVrlpGPgSaYByhXtAJiPOMqL"
         "U5h0eb3sCtM3ek4NvjXFTGTqPrrxJI6q0OsgrtkGE7UM9ZsfMm7q6BOA=="
     ),
-    'ecdsa-sha2-nistp521-cert-v01@openssh.com': (
+    "ecdsa-sha2-nistp521-cert-v01@openssh.com": (
         "AAAAKGVjZHNhLXNoYTItbmlzdHA1MjEtY2VydC12MDFAb3BlbnNzaC5jb20AAAA"
         "gGmRzkkMvRFk1V5U3m3mQ2nfW20SJVXk1NKnT5iZGDcEAAAAIbmlzdHA1MjEAAA"
         "CFBAHosAOHAI1ZkerbKYQ72S6uit1u77PCj/OalZtXgsxv0TTAZB273puG2X94C"
@@ -147,13 +148,13 @@ VALID_CONTENT = {
         "AAAQgEzkIpX3yKXPaPcK17mNx40ujEDitm4ARmbhAge0sFhZtf7YIgI55b6vkI8"
         "JvMJkzQCBF1cpNOaIpVh1nFZNBphMQ=="
     ),
-    'ecdsa-sha2-nistp521': (
+    "ecdsa-sha2-nistp521": (
         "AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAHosAOHAI1"
         "ZkerbKYQ72S6uit1u77PCj/OalZtXgsxv0TTAZB273puG2X94CQ8yyNHcby87zF"
         "ZHdv5BSKyZ/cyREAAeiAcSakop9VS3+bUfZpEIqwBZXarwUjnRnxprkcQ0rfCCd"
         "agkGZr/OA7DemK2D8tKLTHsKoEEWNImo6/pXDkFxA=="
     ),
-    'sk-ecdsa-sha2-nistp256-cert-v01@openssh.com': (
+    "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com": (
         "AAAAIHNzaC1lZDI1NTE5LWNlcnQtdjAxQG9wZW5zc2guY29tAAAAIIxzuxl4z3u"
         "wAIslne8Huft+1n1IhHAlNbWZkQyyECCGAAAAIFOG6kY7Rf4UtCFvPwKgo/BztX"
         "ck2xC4a2WyA34XtIwZAAAAAAAAAAgAAAACAAAABmp1bGl1cwAAABIAAAAFaG9zd"
@@ -162,12 +163,12 @@ VALID_CONTENT = {
         "AAFMAAAALc3NoLWVkMjU1MTkAAABABGTn+Bmz86Ajk+iqKCSdP5NClsYzn4alJd"
         "0V5bizhP0Kumc/HbqQfSt684J1WdSzih+EjvnTgBhK9jTBKb90AQ=="
     ),
-    'sk-ecdsa-sha2-nistp256@openssh.com': (
+    "sk-ecdsa-sha2-nistp256@openssh.com": (
         "AAAAInNrLWVjZHNhLXNoYTItbmlzdHAyNTZAb3BlbnNzaC5jb20AAAAIbmlzdHA"
         "yNTYAAABBBIELQJ2DgvaX1yQlKFokfWM2suuaCFI2qp0eJodHyg6O4ifxc3XpRK"
         "d1OS8dNYQtE/YjdXSrA+AOnMF5ns2Nkx4AAAAEc3NoOg=="
     ),
-    'sk-ssh-ed25519-cert-v01@openssh.com': (
+    "sk-ssh-ed25519-cert-v01@openssh.com": (
         "AAAAIHNzaC1lZDI1NTE5LWNlcnQtdjAxQG9wZW5zc2guY29tAAAAIIxzuxl4z3u"
         "wAIslne8Huft+1n1IhHAlNbWZkQyyECCGAAAAIFOG6kY7Rf4UtCFvPwKgo/BztX"
         "ck2xC4a2WyA34XtIwZAAAAAAAAAAgAAAACAAAABmp1bGl1cwAAABIAAAAFaG9zd"
@@ -176,11 +177,11 @@ VALID_CONTENT = {
         "AAFMAAAALc3NoLWVkMjU1MTkAAABABGTn+Bmz86Ajk+iqKCSdP5NClsYzn4alJd"
         "0V5bizhP0Kumc/HbqQfSt684J1WdSzih+EjvnTgBhK9jTBKb90AQ=="
     ),
-    'sk-ssh-ed25519@openssh.com': (
+    "sk-ssh-ed25519@openssh.com": (
         "AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAICFo/k5LU8863u66YC9"
         "eUO2170QduohPURkQnbLa/dczAAAABHNzaDo="
     ),
-    'ssh-dss-cert-v01@openssh.com': (
+    "ssh-dss-cert-v01@openssh.com": (
         "AAAAHHNzaC1kc3MtY2VydC12MDFAb3BlbnNzaC5jb20AAAAgdTlbNU9Hn9Qng3F"
         "HxwH971bxCIoq1ern/QWFFDWXgmYAAACBAPqS600VGwdPAQC/p3f0uGyrLVql0c"
         "Fn1zYd/JGvtabKnIYjLaYprje/NcjwI3CZFJiz4Dp3S8kLs+X5/1DMn/Tg1Y4D4"
@@ -197,7 +198,7 @@ VALID_CONTENT = {
         "+F7SMGQAAAFMAAAALc3NoLWVkMjU1MTkAAABAh/z1LIdNL1b66tQ8t9DY9BTB3B"
         "QKpTKmc7ezyFKLwl96yaIniZwD9Ticdbe/8i/Li3uCFE3EAt8NAIv9zff8Bg=="
     ),
-    'ssh-dss': (
+    "ssh-dss": (
         "AAAAB3NzaC1kc3MAAACBAPqS600VGwdPAQC/p3f0uGyrLVql0cFn1zYd/JGvtab"
         "KnIYjLaYprje/NcjwI3CZFJiz4Dp3S8kLs+X5/1DMn/Tg1Y4D4yLB+6vCtHcJF7"
         "rVBFhvw/KZwc7G54ez3khyOtsg82fzpyOc8/mq+/+C5TMKO7DDjMF0k5emWKCsa"
@@ -209,7 +210,7 @@ VALID_CONTENT = {
         "GIf95LiLSgaXMjko7joot+LK84ltLymwZ4QMnYjnZSSclf1UuyQMcUtb34+I0u9"
         "Ycnyhp2mSFsQt"
     ),
-    'ssh-ed25519-cert-v01@openssh.com': (
+    "ssh-ed25519-cert-v01@openssh.com": (
         "AAAAIHNzaC1lZDI1NTE5LWNlcnQtdjAxQG9wZW5zc2guY29tAAAAIIxzuxl4z3u"
         "wAIslne8Huft+1n1IhHAlNbWZkQyyECCGAAAAIFOG6kY7Rf4UtCFvPwKgo/BztX"
         "ck2xC4a2WyA34XtIwZAAAAAAAAAAgAAAACAAAABmp1bGl1cwAAABIAAAAFaG9zd"
@@ -218,11 +219,10 @@ VALID_CONTENT = {
         "AAFMAAAALc3NoLWVkMjU1MTkAAABABGTn+Bmz86Ajk+iqKCSdP5NClsYzn4alJd"
         "0V5bizhP0Kumc/HbqQfSt684J1WdSzih+EjvnTgBhK9jTBKb90AQ=="
     ),
-    'ssh-ed25519': (
-        "AAAAC3NzaC1lZDI1NTE5AAAAIFOG6kY7Rf4UtCFvPwKgo/BztXck2xC4a2WyA34"
-        "XtIwZ"
+    "ssh-ed25519": (
+        "AAAAC3NzaC1lZDI1NTE5AAAAIFOG6kY7Rf4UtCFvPwKgo/BztXck2xC4a2WyA34XtIwZ"
     ),
-    'ssh-rsa-cert-v01@openssh.com': (
+    "ssh-rsa-cert-v01@openssh.com": (
         "AAAAHHNzaC1yc2EtY2VydC12MDFAb3BlbnNzaC5jb20AAAAg98LhS2EHxLOWCLo"
         "pZPwHdg/RJXusnkOqQXSc9R7aITkAAAADAQABAAAAgQDLV5lUTt7FrADseB/CGh"
         "EZzpoojjEW5y8+ePvLppmK3MmMI18ud6vxzpK3bwZLYkVSyfJYI0HmIuGhdu7yM"
@@ -233,13 +233,13 @@ VALID_CONTENT = {
         "he0jBkAAABTAAAAC3NzaC1lZDI1NTE5AAAAQI3QGlUCzC07KorupxpDkkGy6tni"
         "aZ8EvBflzvv+itXWNchGvfUeHmVT6aX0sRqehdz/lR+GmXRoZBhofwh0qAM="
     ),
-    'ssh-rsa': (
+    "ssh-rsa": (
         "AAAAB3NzaC1yc2EAAAADAQABAAAAgQDLV5lUTt7FrADseB/CGhEZzpoojjEW5y8"
         "+ePvLppmK3MmMI18ud6vxzpK3bwZLYkVSyfJYI0HmIuGhdu7yMrW6wb84gbq8C3"
         "1Xoe9EORcIUuGSvDKdNSM1SjlhDquRblDFB8kToqXyx1lqrXecXylxIUOL0jE+u"
         "0rU1967pDJx+w=="
     ),
-    'ssh-xmss-cert-v01@openssh.com': (
+    "ssh-xmss-cert-v01@openssh.com": (
         "AAAAHXNzaC14bXNzLWNlcnQtdjAxQG9wZW5zc2guY29tAAAAIM2UD0IH+Igsekq"
         "xjTO5f36exX4WGRMCtDGPjwfbXblxAAAAFVhNU1NfU0hBMi0yNTZfVzE2X0gxMA"
         "AAAEDI83/K5JMOy0BMJgQypRdz35ApAnoQinMJ8ZMoZPaEJF8Z4rANQlfzaAXum"
@@ -305,7 +305,7 @@ VALID_CONTENT = {
         "rNYClh8fQEQ8XuOCDpomMWu58YOTfbZNMDWs/Ou7RfCjX+VNwjPShDK9joMwWKc"
         "Jy3QalZbaoWtcyyvXxR2sqhVR9F7Cmasq4="
     ),
-    'ssh-xmss@openssh.com': (
+    "ssh-xmss@openssh.com": (
         "AAAAFHNzaC14bXNzQG9wZW5zc2guY29tAAAAFVhNU1NfU0hBMi0yNTZfVzE2X0g"
         "xMAAAAECqptWnK94d+Sj2xcdTu8gz+75lawZoLSZFqC5IhbYuT/Z3oBZCim6yt+"
         "HAmk6MKldl3Fg+74v4sR/SII0I0Jv/"
@@ -316,19 +316,25 @@ KEY_TYPES = list(VALID_CONTENT.keys())
 
 TEST_OPTIONS = (
     "no-port-forwarding,no-agent-forwarding,no-X11-forwarding,"
-    'command="echo \'Please login as the user \"ubuntu\" rather than the'
-    'user \"root\".\';echo;sleep 10"')
+    'command="echo \'Please login as the user "ubuntu" rather than the'
+    'user "root".\';echo;sleep 10"'
+)
 
 
 class TestAuthKeyLineParser(test_helpers.CiTestCase):
-
     def test_simple_parse(self):
         # test key line with common 3 fields (keytype, base64, comment)
         parser = ssh_util.AuthKeyLineParser()
         for ktype in KEY_TYPES:
             content = VALID_CONTENT[ktype]
-            comment = 'user-%s@host' % ktype
-            line = ' '.join((ktype, content, comment,))
+            comment = "user-%s@host" % ktype
+            line = " ".join(
+                (
+                    ktype,
+                    content,
+                    comment,
+                )
+            )
             key = parser.parse(line)
 
             self.assertEqual(key.base64, content)
@@ -341,7 +347,12 @@ class TestAuthKeyLineParser(test_helpers.CiTestCase):
         parser = ssh_util.AuthKeyLineParser()
         for ktype in KEY_TYPES:
             content = VALID_CONTENT[ktype]
-            line = ' '.join((ktype, content,))
+            line = " ".join(
+                (
+                    ktype,
+                    content,
+                )
+            )
             key = parser.parse(line)
 
             self.assertEqual(key.base64, content)
@@ -355,8 +366,15 @@ class TestAuthKeyLineParser(test_helpers.CiTestCase):
         options = TEST_OPTIONS
         for ktype in KEY_TYPES:
             content = VALID_CONTENT[ktype]
-            comment = 'user-%s@host' % ktype
-            line = ' '.join((options, ktype, content, comment,))
+            comment = "user-%s@host" % ktype
+            line = " ".join(
+                (
+                    options,
+                    ktype,
+                    content,
+                    comment,
+                )
+            )
             key = parser.parse(line)
 
             self.assertEqual(key.base64, content)
@@ -368,7 +386,7 @@ class TestAuthKeyLineParser(test_helpers.CiTestCase):
         # test key line with key type and base64 only
         parser = ssh_util.AuthKeyLineParser()
 
-        baseline = ' '.join(("rsa", VALID_CONTENT['rsa'], "user@host"))
+        baseline = " ".join(("rsa", VALID_CONTENT["rsa"], "user@host"))
         myopts = "no-port-forwarding,no-agent-forwarding"
 
         key = parser.parse("allowedopt" + " " + baseline)
@@ -379,59 +397,62 @@ class TestAuthKeyLineParser(test_helpers.CiTestCase):
 
     def test_parse_invalid_keytype(self):
         parser = ssh_util.AuthKeyLineParser()
-        key = parser.parse(' '.join(["badkeytype", VALID_CONTENT['rsa']]))
+        key = parser.parse(" ".join(["badkeytype", VALID_CONTENT["rsa"]]))
 
         self.assertFalse(key.valid())
 
 
 class TestUpdateAuthorizedKeys(test_helpers.CiTestCase):
-
     def test_new_keys_replace(self):
         """new entries with the same base64 should replace old."""
         orig_entries = [
-            ' '.join(('rsa', VALID_CONTENT['rsa'], 'orig_comment1')),
-            ' '.join(('dsa', VALID_CONTENT['dsa'], 'orig_comment2'))]
+            " ".join(("rsa", VALID_CONTENT["rsa"], "orig_comment1")),
+            " ".join(("dsa", VALID_CONTENT["dsa"], "orig_comment2")),
+        ]
 
         new_entries = [
-            ' '.join(('rsa', VALID_CONTENT['rsa'], 'new_comment1')), ]
+            " ".join(("rsa", VALID_CONTENT["rsa"], "new_comment1")),
+        ]
 
-        expected = '\n'.join([new_entries[0], orig_entries[1]]) + '\n'
+        expected = "\n".join([new_entries[0], orig_entries[1]]) + "\n"
 
         parser = ssh_util.AuthKeyLineParser()
         found = ssh_util.update_authorized_keys(
             [parser.parse(p) for p in orig_entries],
-            [parser.parse(p) for p in new_entries])
+            [parser.parse(p) for p in new_entries],
+        )
 
         self.assertEqual(expected, found)
 
     def test_new_invalid_keys_are_ignored(self):
         """new entries that are invalid should be skipped."""
         orig_entries = [
-            ' '.join(('rsa', VALID_CONTENT['rsa'], 'orig_comment1')),
-            ' '.join(('dsa', VALID_CONTENT['dsa'], 'orig_comment2'))]
+            " ".join(("rsa", VALID_CONTENT["rsa"], "orig_comment1")),
+            " ".join(("dsa", VALID_CONTENT["dsa"], "orig_comment2")),
+        ]
 
         new_entries = [
-            ' '.join(('rsa', VALID_CONTENT['rsa'], 'new_comment1')),
-            'xxx-invalid-thing1',
-            'xxx-invalid-blob2'
+            " ".join(("rsa", VALID_CONTENT["rsa"], "new_comment1")),
+            "xxx-invalid-thing1",
+            "xxx-invalid-blob2",
         ]
 
-        expected = '\n'.join([new_entries[0], orig_entries[1]]) + '\n'
+        expected = "\n".join([new_entries[0], orig_entries[1]]) + "\n"
 
         parser = ssh_util.AuthKeyLineParser()
         found = ssh_util.update_authorized_keys(
             [parser.parse(p) for p in orig_entries],
-            [parser.parse(p) for p in new_entries])
+            [parser.parse(p) for p in new_entries],
+        )
 
         self.assertEqual(expected, found)
 
 
 class TestParseSSHConfig(test_helpers.CiTestCase):
-
     def setUp(self):
-        self.load_file_patch = patch('cloudinit.ssh_util.util.load_file')
+        self.load_file_patch = patch("cloudinit.ssh_util.util.load_file")
         self.load_file = self.load_file_patch.start()
-        self.isfile_patch = patch('cloudinit.ssh_util.os.path.isfile')
+        self.isfile_patch = patch("cloudinit.ssh_util.os.path.isfile")
         self.isfile = self.isfile_patch.start()
         self.isfile.return_value = True
 
@@ -442,60 +463,61 @@ class TestParseSSHConfig(test_helpers.CiTestCase):
     def test_not_a_file(self):
         self.isfile.return_value = False
         self.load_file.side_effect = IOError
-        ret = ssh_util.parse_ssh_config('not a real file')
+        ret = ssh_util.parse_ssh_config("not a real file")
         self.assertEqual([], ret)
 
     def test_empty_file(self):
-        self.load_file.return_value = ''
-        ret = ssh_util.parse_ssh_config('some real file')
+        self.load_file.return_value = ""
+        ret = ssh_util.parse_ssh_config("some real file")
         self.assertEqual([], ret)
 
     def test_comment_line(self):
-        comment_line = '# This is a comment'
+        comment_line = "# This is a comment"
         self.load_file.return_value = comment_line
-        ret = ssh_util.parse_ssh_config('some real file')
+        ret = ssh_util.parse_ssh_config("some real file")
         self.assertEqual(1, len(ret))
         self.assertEqual(comment_line, ret[0].line)
 
     def test_blank_lines(self):
-        lines = ['', '\t', ' ']
-        self.load_file.return_value = '\n'.join(lines)
-        ret = ssh_util.parse_ssh_config('some real file')
+        lines = ["", "\t", " "]
+        self.load_file.return_value = "\n".join(lines)
+        ret = ssh_util.parse_ssh_config("some real file")
         self.assertEqual(len(lines), len(ret))
         for line in ret:
-            self.assertEqual('', line.line)
+            self.assertEqual("", line.line)
 
     def test_lower_case_config(self):
-        self.load_file.return_value = 'foo bar'
-        ret = ssh_util.parse_ssh_config('some real file')
+        self.load_file.return_value = "foo bar"
+        ret = ssh_util.parse_ssh_config("some real file")
         self.assertEqual(1, len(ret))
-        self.assertEqual('foo', ret[0].key)
-        self.assertEqual('bar', ret[0].value)
+        self.assertEqual("foo", ret[0].key)
+        self.assertEqual("bar", ret[0].value)
 
     def test_upper_case_config(self):
-        self.load_file.return_value = 'Foo Bar'
-        ret = ssh_util.parse_ssh_config('some real file')
+        self.load_file.return_value = "Foo Bar"
+        ret = ssh_util.parse_ssh_config("some real file")
         self.assertEqual(1, len(ret))
-        self.assertEqual('foo', ret[0].key)
-        self.assertEqual('Bar', ret[0].value)
+        self.assertEqual("foo", ret[0].key)
+        self.assertEqual("Bar", ret[0].value)
 
     def test_lower_case_with_equals(self):
-        self.load_file.return_value = 'foo=bar'
-        ret = ssh_util.parse_ssh_config('some real file')
+        self.load_file.return_value = "foo=bar"
+        ret = ssh_util.parse_ssh_config("some real file")
         self.assertEqual(1, len(ret))
-        self.assertEqual('foo', ret[0].key)
-        self.assertEqual('bar', ret[0].value)
+        self.assertEqual("foo", ret[0].key)
+        self.assertEqual("bar", ret[0].value)
 
     def test_upper_case_with_equals(self):
-        self.load_file.return_value = 'Foo=bar'
-        ret = ssh_util.parse_ssh_config('some real file')
+        self.load_file.return_value = "Foo=bar"
+        ret = ssh_util.parse_ssh_config("some real file")
         self.assertEqual(1, len(ret))
-        self.assertEqual('foo', ret[0].key)
-        self.assertEqual('bar', ret[0].value)
+        self.assertEqual("foo", ret[0].key)
+        self.assertEqual("bar", ret[0].value)
 
 
 class TestUpdateSshConfigLines(test_helpers.CiTestCase):
     """Test the update_ssh_config_lines method."""
+
     exlines = [
         "#PasswordAuthentication yes",
         "UsePAM yes",
@@ -514,8 +536,8 @@ class TestUpdateSshConfigLines(test_helpers.CiTestCase):
     def test_new_option_added(self):
         """A single update of non-existing option."""
         lines = ssh_util.parse_ssh_config_lines(list(self.exlines))
-        result = ssh_util.update_ssh_config_lines(lines, {'MyKey': 'MyVal'})
-        self.assertEqual(['MyKey'], result)
+        result = ssh_util.update_ssh_config_lines(lines, {"MyKey": "MyVal"})
+        self.assertEqual(["MyKey"], result)
         self.check_line(lines[-1], "MyKey", "MyVal")
 
     def test_commented_out_not_updated_but_appended(self):
@@ -543,8 +565,12 @@ class TestUpdateSshConfigLines(test_helpers.CiTestCase):
 
     def test_multiple_updates_with_add(self):
         """Verify multiple updates some added some changed, some not."""
-        updates = {"UsePAM": "no", "X11Forwarding": "no", "NewOpt": "newval",
-                   "AcceptEnv": "LANG ADD LC_*"}
+        updates = {
+            "UsePAM": "no",
+            "X11Forwarding": "no",
+            "NewOpt": "newval",
+            "AcceptEnv": "LANG ADD LC_*",
+        }
         lines = ssh_util.parse_ssh_config_lines(list(self.exlines))
         result = ssh_util.update_ssh_config_lines(lines, updates)
         self.assertEqual(set(["UsePAM", "NewOpt", "AcceptEnv"]), set(result))
@@ -569,7 +595,7 @@ class TestUpdateSshConfigLines(test_helpers.CiTestCase):
 
 
 class TestUpdateSshConfig(test_helpers.CiTestCase):
-    cfgdata = '\n'.join(["#Option val", "MyKey ORIG_VAL", ""])
+    cfgdata = "\n".join(["#Option val", "MyKey ORIG_VAL", ""])
 
     def test_modified(self):
         mycfg = self.tmp_path("ssh_config_1")
@@ -579,7 +605,7 @@ class TestUpdateSshConfig(test_helpers.CiTestCase):
         found = util.load_file(mycfg)
         self.assertEqual(self.cfgdata.replace("ORIG_VAL", "NEW_VAL"), found)
         # assert there is a newline at end of file (LP: #1677205)
-        self.assertEqual('\n', found[-1])
+        self.assertEqual("\n", found[-1])
 
     def test_not_modified(self):
         mycfg = self.tmp_path("ssh_config_2")
@@ -596,72 +622,100 @@ class TestBasicAuthorizedKeyParse(test_helpers.CiTestCase):
         self.assertEqual(
             ["/opt/bobby/keys"],
             ssh_util.render_authorizedkeysfile_paths(
-                "/opt/%u/keys", "/home/bobby", "bobby"))
+                "/opt/%u/keys", "/home/bobby", "bobby"
+            ),
+        )
 
     def test_user_file(self):
         self.assertEqual(
             ["/opt/bobby"],
             ssh_util.render_authorizedkeysfile_paths(
-                "/opt/%u", "/home/bobby", "bobby"))
+                "/opt/%u", "/home/bobby", "bobby"
+            ),
+        )
 
     def test_user_file2(self):
         self.assertEqual(
             ["/opt/bobby/bobby"],
             ssh_util.render_authorizedkeysfile_paths(
-                "/opt/%u/%u", "/home/bobby", "bobby"))
+                "/opt/%u/%u", "/home/bobby", "bobby"
+            ),
+        )
 
     def test_multiple(self):
         self.assertEqual(
             ["/keys/path1", "/keys/path2"],
             ssh_util.render_authorizedkeysfile_paths(
-                "/keys/path1 /keys/path2", "/home/bobby", "bobby"))
+                "/keys/path1 /keys/path2", "/home/bobby", "bobby"
+            ),
+        )
 
     def test_multiple2(self):
         self.assertEqual(
             ["/keys/path1", "/keys/bobby"],
             ssh_util.render_authorizedkeysfile_paths(
-                "/keys/path1 /keys/%u", "/home/bobby", "bobby"))
+                "/keys/path1 /keys/%u", "/home/bobby", "bobby"
+            ),
+        )
 
     def test_relative(self):
         self.assertEqual(
             ["/home/bobby/.secret/keys"],
             ssh_util.render_authorizedkeysfile_paths(
-                ".secret/keys", "/home/bobby", "bobby"))
+                ".secret/keys", "/home/bobby", "bobby"
+            ),
+        )
 
     def test_home(self):
         self.assertEqual(
             ["/homedirs/bobby/.keys"],
             ssh_util.render_authorizedkeysfile_paths(
-                "%h/.keys", "/homedirs/bobby", "bobby"))
+                "%h/.keys", "/homedirs/bobby", "bobby"
+            ),
+        )
 
     def test_all(self):
         self.assertEqual(
-            ["/homedirs/bobby/.keys", "/homedirs/bobby/.secret/keys",
-             "/keys/path1", "/opt/bobby/keys"],
+            [
+                "/homedirs/bobby/.keys",
+                "/homedirs/bobby/.secret/keys",
+                "/keys/path1",
+                "/opt/bobby/keys",
+            ],
             ssh_util.render_authorizedkeysfile_paths(
                 "%h/.keys .secret/keys /keys/path1 /opt/%u/keys",
-                "/homedirs/bobby", "bobby"))
+                "/homedirs/bobby",
+                "bobby",
+            ),
+        )
 
 
 class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
-
-    def create_fake_users(self, names, mock_permissions,
-                          m_get_group, m_get_owner, m_get_permissions,
-                          m_getpwnam, users):
+    def create_fake_users(
+        self,
+        names,
+        mock_permissions,
+        m_get_group,
+        m_get_owner,
+        m_get_permissions,
+        m_getpwnam,
+        users,
+    ):
         homes = []
 
-        root = '/tmp/root'
+        root = "/tmp/root"
         fpw = FakePwEnt(pw_name="root", pw_dir=root)
         users["root"] = fpw
 
         for name in names:
-            home = '/tmp/home/' + name
+            home = "/tmp/home/" + name
             fpw = FakePwEnt(pw_name=name, pw_dir=home)
             users[name] = fpw
             homes.append(home)
 
         m_get_permissions.side_effect = partial(
-            mock_get_permissions, mock_permissions)
+            mock_get_permissions, mock_permissions
+        )
         m_get_owner.side_effect = partial(mock_get_owner, mock_permissions)
         m_get_group.side_effect = partial(mock_get_group, mock_permissions)
         m_getpwnam.side_effect = partial(mock_getpwnam, users)
@@ -676,23 +730,24 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
         return authorized_keys
 
     def create_global_authorized_file(self, filename, content_key, keys):
-        authorized_keys = self.tmp_path(filename, dir='/tmp')
+        authorized_keys = self.tmp_path(filename, dir="/tmp")
         util.write_file(authorized_keys, VALID_CONTENT[content_key])
         keys[authorized_keys] = content_key
         return authorized_keys
 
     def create_sshd_config(self, authorized_keys_files):
-        sshd_config = self.tmp_path('sshd_config', dir="/tmp")
+        sshd_config = self.tmp_path("sshd_config", dir="/tmp")
         util.write_file(
-            sshd_config,
-            "AuthorizedKeysFile " + authorized_keys_files
+            sshd_config, "AuthorizedKeysFile " + authorized_keys_files
         )
         return sshd_config
 
-    def execute_and_check(self, user, sshd_config, solution, keys,
-                          delete_keys=True):
+    def execute_and_check(
+        self, user, sshd_config, solution, keys, delete_keys=True
+    ):
         (auth_key_fn, auth_key_entries) = ssh_util.extract_authorized_keys(
-            user, sshd_config)
+            user, sshd_config
+        )
         content = ssh_util.update_authorized_keys(auth_key_entries, [])
 
         self.assertEqual(auth_key_fn, solution)
@@ -712,30 +767,35 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     def test_single_user_two_local_files(
         self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam
     ):
-        user_bobby = 'bobby'
+        user_bobby = "bobby"
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/user_keys': ('bobby', 'bobby', 0o600),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/user_keys": ("bobby", "bobby", 0o600),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
         }
 
         homes = self.create_fake_users(
-            [user_bobby], mock_permissions, m_get_group, m_get_owner,
-            m_get_permissions, m_getpwnam, users
+            [user_bobby],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home = homes[0]
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home, 'authorized_keys', 'rsa', keys
+            home, "authorized_keys", "rsa", keys
         )
 
         # /tmp/home/bobby/.ssh/user_keys = dsa
         user_keys = self.create_user_authorized_file(
-            home, 'user_keys', 'dsa', keys
+            home, "user_keys", "dsa", keys
         )
 
         # /tmp/sshd_config
@@ -751,30 +811,35 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     def test_single_user_two_local_files_inverted(
         self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam
     ):
-        user_bobby = 'bobby'
+        user_bobby = "bobby"
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/user_keys': ('bobby', 'bobby', 0o600),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/user_keys": ("bobby", "bobby", 0o600),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
         }
 
         homes = self.create_fake_users(
-            [user_bobby], mock_permissions, m_get_group, m_get_owner,
-            m_get_permissions, m_getpwnam, users
+            [user_bobby],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home = homes[0]
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home, 'authorized_keys', 'rsa', keys
+            home, "authorized_keys", "rsa", keys
         )
 
         # /tmp/home/bobby/.ssh/user_keys = dsa
         user_keys = self.create_user_authorized_file(
-            home, 'user_keys', 'dsa', keys
+            home, "user_keys", "dsa", keys
         )
 
         # /tmp/sshd_config
@@ -790,38 +855,46 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     def test_single_user_local_global_files(
         self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam
     ):
-        user_bobby = 'bobby'
+        user_bobby = "bobby"
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/user_keys': ('bobby', 'bobby', 0o600),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/user_keys": ("bobby", "bobby", 0o600),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
         }
 
         homes = self.create_fake_users(
-            [user_bobby], mock_permissions, m_get_group, m_get_owner,
-            m_get_permissions, m_getpwnam, users
+            [user_bobby],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home = homes[0]
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home, 'authorized_keys', 'rsa', keys
+            home, "authorized_keys", "rsa", keys
         )
 
         # /tmp/home/bobby/.ssh/user_keys = dsa
         user_keys = self.create_user_authorized_file(
-            home, 'user_keys', 'dsa', keys
+            home, "user_keys", "dsa", keys
         )
 
         authorized_keys_global = self.create_global_authorized_file(
-            'etc/ssh/authorized_keys', 'ecdsa', keys
+            "etc/ssh/authorized_keys", "ecdsa", keys
         )
 
-        options = "%s %s %s" % (authorized_keys_global, user_keys,
-                                authorized_keys)
+        options = "%s %s %s" % (
+            authorized_keys_global,
+            user_keys,
+            authorized_keys,
+        )
         sshd_config = self.create_sshd_config(options)
 
         self.execute_and_check(user_bobby, sshd_config, user_keys, keys)
@@ -833,38 +906,46 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     def test_single_user_local_global_files_inverted(
         self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam
     ):
-        user_bobby = 'bobby'
+        user_bobby = "bobby"
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/user_keys3': ('bobby', 'bobby', 0o600),
-            '/tmp/home/bobby/.ssh/authorized_keys2': ('bobby', 'bobby', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/user_keys3": ("bobby", "bobby", 0o600),
+            "/tmp/home/bobby/.ssh/authorized_keys2": ("bobby", "bobby", 0o600),
         }
 
         homes = self.create_fake_users(
-            [user_bobby], mock_permissions, m_get_group, m_get_owner,
-            m_get_permissions, m_getpwnam, users
+            [user_bobby],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home = homes[0]
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home, 'authorized_keys2', 'rsa', keys
+            home, "authorized_keys2", "rsa", keys
         )
 
         # /tmp/home/bobby/.ssh/user_keys = dsa
         user_keys = self.create_user_authorized_file(
-            home, 'user_keys3', 'dsa', keys
+            home, "user_keys3", "dsa", keys
         )
 
         authorized_keys_global = self.create_global_authorized_file(
-            'etc/ssh/authorized_keys', 'ecdsa', keys
+            "etc/ssh/authorized_keys", "ecdsa", keys
         )
 
-        options = "%s %s %s" % (authorized_keys_global, authorized_keys,
-                                user_keys)
+        options = "%s %s %s" % (
+            authorized_keys_global,
+            authorized_keys,
+            user_keys,
+        )
         sshd_config = self.create_sshd_config(options)
 
         self.execute_and_check(user_bobby, sshd_config, authorized_keys, keys)
@@ -876,24 +957,29 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     def test_single_user_global_file(
         self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam
     ):
-        user_bobby = 'bobby'
+        user_bobby = "bobby"
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
         }
 
         homes = self.create_fake_users(
-            [user_bobby], mock_permissions, m_get_group, m_get_owner,
-            m_get_permissions, m_getpwnam, users
+            [user_bobby],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home = homes[0]
 
         # /tmp/etc/ssh/authorized_keys = rsa
         authorized_keys_global = self.create_global_authorized_file(
-            'etc/ssh/authorized_keys', 'rsa', keys
+            "etc/ssh/authorized_keys", "rsa", keys
         )
 
         options = "%s" % authorized_keys_global
@@ -912,31 +998,36 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
-            '/tmp/home/suzie': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh/authorized_keys': ('suzie', 'suzie', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
+            "/tmp/home/suzie": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh/authorized_keys": ("suzie", "suzie", 0o600),
         }
 
-        user_bobby = 'bobby'
-        user_suzie = 'suzie'
+        user_bobby = "bobby"
+        user_suzie = "suzie"
         homes = self.create_fake_users(
-            [user_bobby, user_suzie], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_suzie],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home_bobby = homes[0]
         home_suzie = homes[1]
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home_bobby, 'authorized_keys', 'rsa', keys
+            home_bobby, "authorized_keys", "rsa", keys
         )
 
         # /tmp/home/suzie/.ssh/authorized_keys = rsa
         authorized_keys2 = self.create_user_authorized_file(
-            home_suzie, 'authorized_keys', 'ssh-xmss@openssh.com', keys
+            home_suzie, "authorized_keys", "ssh-xmss@openssh.com", keys
         )
 
         options = ".ssh/authorized_keys"
@@ -957,31 +1048,36 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys2': ('bobby', 'bobby', 0o600),
-            '/tmp/home/suzie': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh/authorized_keys2': ('suzie', 'suzie', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys2": ("bobby", "bobby", 0o600),
+            "/tmp/home/suzie": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh/authorized_keys2": ("suzie", "suzie", 0o600),
         }
 
-        user_bobby = 'bobby'
-        user_suzie = 'suzie'
+        user_bobby = "bobby"
+        user_suzie = "suzie"
         homes = self.create_fake_users(
-            [user_bobby, user_suzie], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_suzie],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home_bobby = homes[0]
         home_suzie = homes[1]
 
         # /tmp/home/bobby/.ssh/authorized_keys2 = rsa
         authorized_keys = self.create_user_authorized_file(
-            home_bobby, 'authorized_keys2', 'rsa', keys
+            home_bobby, "authorized_keys2", "rsa", keys
         )
 
         # /tmp/home/suzie/.ssh/authorized_keys2 = rsa
         authorized_keys2 = self.create_user_authorized_file(
-            home_suzie, 'authorized_keys2', 'ssh-xmss@openssh.com', keys
+            home_suzie, "authorized_keys2", "ssh-xmss@openssh.com", keys
         )
 
         options = ".ssh/authorized_keys2"
@@ -1002,46 +1098,53 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys2': ('bobby', 'bobby', 0o600),
-            '/tmp/home/bobby/.ssh/user_keys3': ('bobby', 'bobby', 0o600),
-            '/tmp/home/suzie': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh/authorized_keys2': ('suzie', 'suzie', 0o600),
-            '/tmp/home/suzie/.ssh/user_keys3': ('suzie', 'suzie', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys2": ("bobby", "bobby", 0o600),
+            "/tmp/home/bobby/.ssh/user_keys3": ("bobby", "bobby", 0o600),
+            "/tmp/home/suzie": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh/authorized_keys2": ("suzie", "suzie", 0o600),
+            "/tmp/home/suzie/.ssh/user_keys3": ("suzie", "suzie", 0o600),
         }
 
-        user_bobby = 'bobby'
-        user_suzie = 'suzie'
+        user_bobby = "bobby"
+        user_suzie = "suzie"
         homes = self.create_fake_users(
-            [user_bobby, user_suzie], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_suzie],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home_bobby = homes[0]
         home_suzie = homes[1]
 
         # /tmp/home/bobby/.ssh/authorized_keys2 = rsa
         self.create_user_authorized_file(
-            home_bobby, 'authorized_keys2', 'rsa', keys
+            home_bobby, "authorized_keys2", "rsa", keys
         )
         # /tmp/home/bobby/.ssh/user_keys3 = dsa
         user_keys = self.create_user_authorized_file(
-            home_bobby, 'user_keys3', 'dsa', keys
+            home_bobby, "user_keys3", "dsa", keys
         )
 
         # /tmp/home/suzie/.ssh/authorized_keys2 = rsa
         authorized_keys2 = self.create_user_authorized_file(
-            home_suzie, 'authorized_keys2', 'ssh-xmss@openssh.com', keys
+            home_suzie, "authorized_keys2", "ssh-xmss@openssh.com", keys
         )
 
         # /tmp/etc/ssh/authorized_keys = ecdsa
         authorized_keys_global = self.create_global_authorized_file(
-            'etc/ssh/authorized_keys2', 'ecdsa', keys
+            "etc/ssh/authorized_keys2", "ecdsa", keys
         )
 
-        options = "%s %s %%h/.ssh/authorized_keys2" % \
-            (authorized_keys_global, user_keys)
+        options = "%s %s %%h/.ssh/authorized_keys2" % (
+            authorized_keys_global,
+            user_keys,
+        )
         sshd_config = self.create_sshd_config(options)
 
         self.execute_and_check(
@@ -1055,50 +1158,62 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     @patch("cloudinit.util.get_owner")
     @patch("cloudinit.util.get_group")
     def test_two_users_local_global_files_badguy(
-        self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam,
-        m_get_user_groups
+        self,
+        m_get_group,
+        m_get_owner,
+        m_get_permissions,
+        m_getpwnam,
+        m_get_user_groups,
     ):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys2': ('bobby', 'bobby', 0o600),
-            '/tmp/home/bobby/.ssh/user_keys3': ('bobby', 'bobby', 0o600),
-            '/tmp/home/badguy': ('root', 'root', 0o755),
-            '/tmp/home/badguy/home': ('root', 'root', 0o755),
-            '/tmp/home/badguy/home/bobby': ('root', 'root', 0o655),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys2": ("bobby", "bobby", 0o600),
+            "/tmp/home/bobby/.ssh/user_keys3": ("bobby", "bobby", 0o600),
+            "/tmp/home/badguy": ("root", "root", 0o755),
+            "/tmp/home/badguy/home": ("root", "root", 0o755),
+            "/tmp/home/badguy/home/bobby": ("root", "root", 0o655),
         }
 
-        user_bobby = 'bobby'
-        user_badguy = 'badguy'
+        user_bobby = "bobby"
+        user_badguy = "badguy"
         home_bobby, *_ = self.create_fake_users(
-            [user_bobby, user_badguy], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_badguy],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         m_get_user_groups.side_effect = mock_get_user_groups
 
         # /tmp/home/bobby/.ssh/authorized_keys2 = rsa
         authorized_keys = self.create_user_authorized_file(
-            home_bobby, 'authorized_keys2', 'rsa', keys
+            home_bobby, "authorized_keys2", "rsa", keys
         )
         # /tmp/home/bobby/.ssh/user_keys3 = dsa
         user_keys = self.create_user_authorized_file(
-            home_bobby, 'user_keys3', 'dsa', keys
+            home_bobby, "user_keys3", "dsa", keys
         )
 
         # /tmp/home/badguy/home/bobby = ""
-        authorized_keys2 = self.tmp_path('home/bobby', dir="/tmp/home/badguy")
-        util.write_file(authorized_keys2, '')
+        authorized_keys2 = self.tmp_path("home/bobby", dir="/tmp/home/badguy")
+        util.write_file(authorized_keys2, "")
 
         # /tmp/etc/ssh/authorized_keys = ecdsa
         authorized_keys_global = self.create_global_authorized_file(
-            'etc/ssh/authorized_keys2', 'ecdsa', keys
+            "etc/ssh/authorized_keys2", "ecdsa", keys
         )
 
         # /tmp/sshd_config
-        options = "%s %%h/.ssh/authorized_keys2 %s %s" % \
-            (authorized_keys2, authorized_keys_global, user_keys)
+        options = "%s %%h/.ssh/authorized_keys2 %s %s" % (
+            authorized_keys2,
+            authorized_keys_global,
+            user_keys,
+        )
         sshd_config = self.create_sshd_config(options)
 
         self.execute_and_check(
@@ -1114,33 +1229,43 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     @patch("cloudinit.util.get_owner")
     @patch("cloudinit.util.get_group")
     def test_two_users_unaccessible_file(
-        self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam,
-        m_get_user_groups
+        self,
+        m_get_group,
+        m_get_owner,
+        m_get_permissions,
+        m_getpwnam,
+        m_get_user_groups,
     ):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
-
-            '/tmp/etc': ('root', 'root', 0o755),
-            '/tmp/etc/ssh': ('root', 'root', 0o755),
-            '/tmp/etc/ssh/userkeys': ('root', 'root', 0o700),
-            '/tmp/etc/ssh/userkeys/bobby': ('bobby', 'bobby', 0o600),
-            '/tmp/etc/ssh/userkeys/badguy': ('badguy', 'badguy', 0o600),
-
-            '/tmp/home/badguy': ('badguy', 'badguy', 0o700),
-            '/tmp/home/badguy/.ssh': ('badguy', 'badguy', 0o700),
-            '/tmp/home/badguy/.ssh/authorized_keys':
-                ('badguy', 'badguy', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
+            "/tmp/etc": ("root", "root", 0o755),
+            "/tmp/etc/ssh": ("root", "root", 0o755),
+            "/tmp/etc/ssh/userkeys": ("root", "root", 0o700),
+            "/tmp/etc/ssh/userkeys/bobby": ("bobby", "bobby", 0o600),
+            "/tmp/etc/ssh/userkeys/badguy": ("badguy", "badguy", 0o600),
+            "/tmp/home/badguy": ("badguy", "badguy", 0o700),
+            "/tmp/home/badguy/.ssh": ("badguy", "badguy", 0o700),
+            "/tmp/home/badguy/.ssh/authorized_keys": (
+                "badguy",
+                "badguy",
+                0o600,
+            ),
         }
 
-        user_bobby = 'bobby'
-        user_badguy = 'badguy'
+        user_bobby = "bobby"
+        user_badguy = "badguy"
         homes = self.create_fake_users(
-            [user_bobby, user_badguy], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_badguy],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         m_get_user_groups.side_effect = mock_get_user_groups
         home_bobby = homes[0]
@@ -1148,22 +1273,22 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home_bobby, 'authorized_keys', 'rsa', keys
+            home_bobby, "authorized_keys", "rsa", keys
         )
         # /tmp/etc/ssh/userkeys/bobby = dsa
         # assume here that we can bypass userkeys, despite permissions
         self.create_global_authorized_file(
-            'etc/ssh/userkeys/bobby', 'dsa', keys
+            "etc/ssh/userkeys/bobby", "dsa", keys
         )
 
         # /tmp/home/badguy/.ssh/authorized_keys = ssh-xmss@openssh.com
         authorized_keys2 = self.create_user_authorized_file(
-            home_badguy, 'authorized_keys', 'ssh-xmss@openssh.com', keys
+            home_badguy, "authorized_keys", "ssh-xmss@openssh.com", keys
         )
 
         # /tmp/etc/ssh/userkeys/badguy = ecdsa
         self.create_global_authorized_file(
-            'etc/ssh/userkeys/badguy', 'ecdsa', keys
+            "etc/ssh/userkeys/badguy", "ecdsa", keys
         )
 
         # /tmp/sshd_config
@@ -1183,33 +1308,43 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     @patch("cloudinit.util.get_owner")
     @patch("cloudinit.util.get_group")
     def test_two_users_accessible_file(
-        self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam,
-        m_get_user_groups
+        self,
+        m_get_group,
+        m_get_owner,
+        m_get_permissions,
+        m_getpwnam,
+        m_get_user_groups,
     ):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
-
-            '/tmp/etc': ('root', 'root', 0o755),
-            '/tmp/etc/ssh': ('root', 'root', 0o755),
-            '/tmp/etc/ssh/userkeys': ('root', 'root', 0o755),
-            '/tmp/etc/ssh/userkeys/bobby': ('bobby', 'bobby', 0o600),
-            '/tmp/etc/ssh/userkeys/badguy': ('badguy', 'badguy', 0o600),
-
-            '/tmp/home/badguy': ('badguy', 'badguy', 0o700),
-            '/tmp/home/badguy/.ssh': ('badguy', 'badguy', 0o700),
-            '/tmp/home/badguy/.ssh/authorized_keys':
-                ('badguy', 'badguy', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
+            "/tmp/etc": ("root", "root", 0o755),
+            "/tmp/etc/ssh": ("root", "root", 0o755),
+            "/tmp/etc/ssh/userkeys": ("root", "root", 0o755),
+            "/tmp/etc/ssh/userkeys/bobby": ("bobby", "bobby", 0o600),
+            "/tmp/etc/ssh/userkeys/badguy": ("badguy", "badguy", 0o600),
+            "/tmp/home/badguy": ("badguy", "badguy", 0o700),
+            "/tmp/home/badguy/.ssh": ("badguy", "badguy", 0o700),
+            "/tmp/home/badguy/.ssh/authorized_keys": (
+                "badguy",
+                "badguy",
+                0o600,
+            ),
         }
 
-        user_bobby = 'bobby'
-        user_badguy = 'badguy'
+        user_bobby = "bobby"
+        user_badguy = "badguy"
         homes = self.create_fake_users(
-            [user_bobby, user_badguy], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_badguy],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         m_get_user_groups.side_effect = mock_get_user_groups
         home_bobby = homes[0]
@@ -1217,22 +1352,22 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         self.create_user_authorized_file(
-            home_bobby, 'authorized_keys', 'rsa', keys
+            home_bobby, "authorized_keys", "rsa", keys
         )
         # /tmp/etc/ssh/userkeys/bobby = dsa
         # assume here that we can bypass userkeys, despite permissions
         authorized_keys = self.create_global_authorized_file(
-            'etc/ssh/userkeys/bobby', 'dsa', keys
+            "etc/ssh/userkeys/bobby", "dsa", keys
         )
 
         # /tmp/home/badguy/.ssh/authorized_keys = ssh-xmss@openssh.com
         self.create_user_authorized_file(
-            home_badguy, 'authorized_keys', 'ssh-xmss@openssh.com', keys
+            home_badguy, "authorized_keys", "ssh-xmss@openssh.com", keys
         )
 
         # /tmp/etc/ssh/userkeys/badguy = ecdsa
         authorized_keys2 = self.create_global_authorized_file(
-            'etc/ssh/userkeys/badguy', 'ecdsa', keys
+            "etc/ssh/userkeys/badguy", "ecdsa", keys
         )
 
         # /tmp/sshd_config
@@ -1252,26 +1387,34 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     @patch("cloudinit.util.get_owner")
     @patch("cloudinit.util.get_group")
     def test_two_users_hardcoded_single_user_file(
-        self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam,
-        m_get_user_groups
+        self,
+        m_get_group,
+        m_get_owner,
+        m_get_permissions,
+        m_getpwnam,
+        m_get_user_groups,
     ):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
-
-            '/tmp/home/suzie': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh/authorized_keys': ('suzie', 'suzie', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
+            "/tmp/home/suzie": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh/authorized_keys": ("suzie", "suzie", 0o600),
         }
 
-        user_bobby = 'bobby'
-        user_suzie = 'suzie'
+        user_bobby = "bobby"
+        user_suzie = "suzie"
         homes = self.create_fake_users(
-            [user_bobby, user_suzie], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_suzie],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home_bobby = homes[0]
         home_suzie = homes[1]
@@ -1279,12 +1422,12 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home_bobby, 'authorized_keys', 'rsa', keys
+            home_bobby, "authorized_keys", "rsa", keys
         )
 
         # /tmp/home/suzie/.ssh/authorized_keys = ssh-xmss@openssh.com
         self.create_user_authorized_file(
-            home_suzie, 'authorized_keys', 'ssh-xmss@openssh.com', keys
+            home_suzie, "authorized_keys", "ssh-xmss@openssh.com", keys
         )
 
         # /tmp/sshd_config
@@ -1303,26 +1446,34 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     @patch("cloudinit.util.get_owner")
     @patch("cloudinit.util.get_group")
     def test_two_users_hardcoded_single_user_file_inverted(
-        self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam,
-        m_get_user_groups
+        self,
+        m_get_group,
+        m_get_owner,
+        m_get_permissions,
+        m_getpwnam,
+        m_get_user_groups,
     ):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
-
-            '/tmp/home/suzie': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh/authorized_keys': ('suzie', 'suzie', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
+            "/tmp/home/suzie": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh/authorized_keys": ("suzie", "suzie", 0o600),
         }
 
-        user_bobby = 'bobby'
-        user_suzie = 'suzie'
+        user_bobby = "bobby"
+        user_suzie = "suzie"
         homes = self.create_fake_users(
-            [user_bobby, user_suzie], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_suzie],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home_bobby = homes[0]
         home_suzie = homes[1]
@@ -1330,12 +1481,12 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         self.create_user_authorized_file(
-            home_bobby, 'authorized_keys', 'rsa', keys
+            home_bobby, "authorized_keys", "rsa", keys
         )
 
         # /tmp/home/suzie/.ssh/authorized_keys = ssh-xmss@openssh.com
         authorized_keys2 = self.create_user_authorized_file(
-            home_suzie, 'authorized_keys', 'ssh-xmss@openssh.com', keys
+            home_suzie, "authorized_keys", "ssh-xmss@openssh.com", keys
         )
 
         # /tmp/sshd_config
@@ -1354,26 +1505,34 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
     @patch("cloudinit.util.get_owner")
     @patch("cloudinit.util.get_group")
     def test_two_users_hardcoded_user_files(
-        self, m_get_group, m_get_owner, m_get_permissions, m_getpwnam,
-        m_get_user_groups
+        self,
+        m_get_group,
+        m_get_owner,
+        m_get_permissions,
+        m_getpwnam,
+        m_get_user_groups,
     ):
         keys = {}
         users = {}
         mock_permissions = {
-            '/tmp/home/bobby': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh': ('bobby', 'bobby', 0o700),
-            '/tmp/home/bobby/.ssh/authorized_keys': ('bobby', 'bobby', 0o600),
-
-            '/tmp/home/suzie': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh': ('suzie', 'suzie', 0o700),
-            '/tmp/home/suzie/.ssh/authorized_keys': ('suzie', 'suzie', 0o600),
+            "/tmp/home/bobby": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh": ("bobby", "bobby", 0o700),
+            "/tmp/home/bobby/.ssh/authorized_keys": ("bobby", "bobby", 0o600),
+            "/tmp/home/suzie": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh": ("suzie", "suzie", 0o700),
+            "/tmp/home/suzie/.ssh/authorized_keys": ("suzie", "suzie", 0o600),
         }
 
-        user_bobby = 'bobby'
-        user_suzie = 'suzie'
+        user_bobby = "bobby"
+        user_suzie = "suzie"
         homes = self.create_fake_users(
-            [user_bobby, user_suzie], mock_permissions, m_get_group,
-            m_get_owner, m_get_permissions, m_getpwnam, users
+            [user_bobby, user_suzie],
+            mock_permissions,
+            m_get_group,
+            m_get_owner,
+            m_get_permissions,
+            m_getpwnam,
+            users,
         )
         home_bobby = homes[0]
         home_suzie = homes[1]
@@ -1381,22 +1540,25 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
 
         # /tmp/home/bobby/.ssh/authorized_keys = rsa
         authorized_keys = self.create_user_authorized_file(
-            home_bobby, 'authorized_keys', 'rsa', keys
+            home_bobby, "authorized_keys", "rsa", keys
         )
 
         # /tmp/home/suzie/.ssh/authorized_keys = ssh-xmss@openssh.com
         authorized_keys2 = self.create_user_authorized_file(
-            home_suzie, 'authorized_keys', 'ssh-xmss@openssh.com', keys
+            home_suzie, "authorized_keys", "ssh-xmss@openssh.com", keys
         )
 
         # /tmp/etc/ssh/authorized_keys = ecdsa
         authorized_keys_global = self.create_global_authorized_file(
-            'etc/ssh/authorized_keys', 'ecdsa', keys
+            "etc/ssh/authorized_keys", "ecdsa", keys
         )
 
         # /tmp/sshd_config
-        options = "%s %s %s" % \
-            (authorized_keys_global, authorized_keys, authorized_keys2)
+        options = "%s %s %s" % (
+            authorized_keys_global,
+            authorized_keys,
+            authorized_keys2,
+        )
         sshd_config = self.create_sshd_config(options)
 
         self.execute_and_check(
@@ -1404,4 +1566,5 @@ class TestMultipleSshAuthorizedKeysFile(test_helpers.CiTestCase):
         )
         self.execute_and_check(user_suzie, sshd_config, authorized_keys2, keys)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_stages.py b/tests/unittests/test_stages.py
index a722f03f..be1a0787 100644
--- a/tests/unittests/test_stages.py
+++ b/tests/unittests/test_stages.py
@@ -6,28 +6,25 @@ import stat
 
 import pytest
 
-from cloudinit import stages
-from cloudinit import sources
-from cloudinit.sources import NetworkConfigSource
-
+from cloudinit import sources, stages
 from cloudinit.event import EventScope, EventType
+from cloudinit.sources import NetworkConfigSource
 from cloudinit.util import write_file
-
 from tests.unittests.helpers import CiTestCase, mock
 
-TEST_INSTANCE_ID = 'i-testing'
+TEST_INSTANCE_ID = "i-testing"
 
 
 class FakeDataSource(sources.DataSource):
-
-    def __init__(self, paths=None, userdata=None, vendordata=None,
-                 network_config=''):
+    def __init__(
+        self, paths=None, userdata=None, vendordata=None, network_config=""
+    ):
         super(FakeDataSource, self).__init__({}, None, paths=paths)
-        self.metadata = {'instance-id': TEST_INSTANCE_ID}
+        self.metadata = {"instance-id": TEST_INSTANCE_ID}
         self.userdata_raw = userdata
         self.vendordata_raw = vendordata
         self._network_config = None
-        if network_config:   # Permit for None value to setup attribute
+        if network_config:  # Permit for None value to setup attribute
             self._network_config = network_config
 
     @property
@@ -47,9 +44,12 @@ class TestInit(CiTestCase):
         self.tmpdir = self.tmp_dir()
         self.init = stages.Init()
         # Setup fake Paths for Init to reference
-        self.init._cfg = {'system_info': {
-            'distro': 'ubuntu', 'paths': {'cloud_dir': self.tmpdir,
-                                          'run_dir': self.tmpdir}}}
+        self.init._cfg = {
+            "system_info": {
+                "distro": "ubuntu",
+                "paths": {"cloud_dir": self.tmpdir, "run_dir": self.tmpdir},
+            }
+        }
         self.init.datasource = FakeDataSource(paths=self.init.paths)
         self._real_is_new_instance = self.init.is_new_instance
         self.init.is_new_instance = mock.Mock(return_value=True)
@@ -57,199 +57,255 @@ class TestInit(CiTestCase):
     def test_wb__find_networking_config_disabled(self):
         """find_networking_config returns no config when disabled."""
         disable_file = os.path.join(
-            self.init.paths.get_cpath('data'), 'upgraded-network')
-        write_file(disable_file, '')
+            self.init.paths.get_cpath("data"), "upgraded-network"
+        )
+        write_file(disable_file, "")
         self.assertEqual(
-            (None, disable_file),
-            self.init._find_networking_config())
+            (None, disable_file), self.init._find_networking_config()
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_disabled_by_kernel(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns when disabled by kernel cmdline."""
-        m_cmdline.return_value = {'config': 'disabled'}
-        m_initramfs.return_value = {'config': ['fake_initrd']}
+        m_cmdline.return_value = {"config": "disabled"}
+        m_initramfs.return_value = {"config": ["fake_initrd"]}
         self.assertEqual(
             (None, NetworkConfigSource.cmdline),
-            self.init._find_networking_config())
-        self.assertEqual('DEBUG: network config disabled by cmdline\n',
-                         self.logs.getvalue())
+            self.init._find_networking_config(),
+        )
+        self.assertEqual(
+            "DEBUG: network config disabled by cmdline\n", self.logs.getvalue()
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_disabled_by_initrd(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns when disabled by kernel cmdline."""
         m_cmdline.return_value = {}
-        m_initramfs.return_value = {'config': 'disabled'}
+        m_initramfs.return_value = {"config": "disabled"}
         self.assertEqual(
             (None, NetworkConfigSource.initramfs),
-            self.init._find_networking_config())
-        self.assertEqual('DEBUG: network config disabled by initramfs\n',
-                         self.logs.getvalue())
+            self.init._find_networking_config(),
+        )
+        self.assertEqual(
+            "DEBUG: network config disabled by initramfs\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_disabled_by_datasrc(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns when disabled by datasource cfg."""
         m_cmdline.return_value = {}  # Kernel doesn't disable networking
         m_initramfs.return_value = {}  # initramfs doesn't disable networking
-        self.init._cfg = {'system_info': {'paths': {'cloud_dir': self.tmpdir}},
-                          'network': {}}  # system config doesn't disable
+        self.init._cfg = {
+            "system_info": {"paths": {"cloud_dir": self.tmpdir}},
+            "network": {},
+        }  # system config doesn't disable
 
         self.init.datasource = FakeDataSource(
-            network_config={'config': 'disabled'})
+            network_config={"config": "disabled"}
+        )
+        self.assertEqual(
+            (None, NetworkConfigSource.ds), self.init._find_networking_config()
+        )
         self.assertEqual(
-            (None, NetworkConfigSource.ds),
-            self.init._find_networking_config())
-        self.assertEqual('DEBUG: network config disabled by ds\n',
-                         self.logs.getvalue())
+            "DEBUG: network config disabled by ds\n", self.logs.getvalue()
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_disabled_by_sysconfig(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns when disabled by system config."""
         m_cmdline.return_value = {}  # Kernel doesn't disable networking
         m_initramfs.return_value = {}  # initramfs doesn't disable networking
-        self.init._cfg = {'system_info': {'paths': {'cloud_dir': self.tmpdir}},
-                          'network': {'config': 'disabled'}}
+        self.init._cfg = {
+            "system_info": {"paths": {"cloud_dir": self.tmpdir}},
+            "network": {"config": "disabled"},
+        }
         self.assertEqual(
             (None, NetworkConfigSource.system_cfg),
-            self.init._find_networking_config())
-        self.assertEqual('DEBUG: network config disabled by system_cfg\n',
-                         self.logs.getvalue())
+            self.init._find_networking_config(),
+        )
+        self.assertEqual(
+            "DEBUG: network config disabled by system_cfg\n",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test__find_networking_config_uses_datasrc_order(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config should check sources in DS defined order"""
         # cmdline and initramfs, which would normally be preferred over other
         # sources, disable networking; in this case, though, the DS moves them
         # later so its own config is preferred
-        m_cmdline.return_value = {'config': 'disabled'}
-        m_initramfs.return_value = {'config': 'disabled'}
+        m_cmdline.return_value = {"config": "disabled"}
+        m_initramfs.return_value = {"config": "disabled"}
 
-        ds_net_cfg = {'config': {'needle': True}}
+        ds_net_cfg = {"config": {"needle": True}}
         self.init.datasource = FakeDataSource(network_config=ds_net_cfg)
         self.init.datasource.network_config_sources = [
-            NetworkConfigSource.ds, NetworkConfigSource.system_cfg,
-            NetworkConfigSource.cmdline, NetworkConfigSource.initramfs]
+            NetworkConfigSource.ds,
+            NetworkConfigSource.system_cfg,
+            NetworkConfigSource.cmdline,
+            NetworkConfigSource.initramfs,
+        ]
 
         self.assertEqual(
             (ds_net_cfg, NetworkConfigSource.ds),
-            self.init._find_networking_config())
+            self.init._find_networking_config(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test__find_networking_config_warns_if_datasrc_uses_invalid_src(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config should check sources in DS defined order"""
-        ds_net_cfg = {'config': {'needle': True}}
+        ds_net_cfg = {"config": {"needle": True}}
         self.init.datasource = FakeDataSource(network_config=ds_net_cfg)
         self.init.datasource.network_config_sources = [
-            'invalid_src', NetworkConfigSource.ds]
+            "invalid_src",
+            NetworkConfigSource.ds,
+        ]
 
         self.assertEqual(
             (ds_net_cfg, NetworkConfigSource.ds),
-            self.init._find_networking_config())
-        self.assertIn('WARNING: data source specifies an invalid network'
-                      ' cfg_source: invalid_src',
-                      self.logs.getvalue())
+            self.init._find_networking_config(),
+        )
+        self.assertIn(
+            "WARNING: data source specifies an invalid network"
+            " cfg_source: invalid_src",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test__find_networking_config_warns_if_datasrc_uses_unavailable_src(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config should check sources in DS defined order"""
-        ds_net_cfg = {'config': {'needle': True}}
+        ds_net_cfg = {"config": {"needle": True}}
         self.init.datasource = FakeDataSource(network_config=ds_net_cfg)
         self.init.datasource.network_config_sources = [
-            NetworkConfigSource.fallback, NetworkConfigSource.ds]
+            NetworkConfigSource.fallback,
+            NetworkConfigSource.ds,
+        ]
 
         self.assertEqual(
             (ds_net_cfg, NetworkConfigSource.ds),
-            self.init._find_networking_config())
-        self.assertIn('WARNING: data source specifies an unavailable network'
-                      ' cfg_source: fallback',
-                      self.logs.getvalue())
+            self.init._find_networking_config(),
+        )
+        self.assertIn(
+            "WARNING: data source specifies an unavailable network"
+            " cfg_source: fallback",
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_returns_kernel(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns kernel cmdline config if present."""
-        expected_cfg = {'config': ['fakekernel']}
+        expected_cfg = {"config": ["fakekernel"]}
         m_cmdline.return_value = expected_cfg
-        m_initramfs.return_value = {'config': ['fake_initrd']}
-        self.init._cfg = {'system_info': {'paths': {'cloud_dir': self.tmpdir}},
-                          'network': {'config': ['fakesys_config']}}
+        m_initramfs.return_value = {"config": ["fake_initrd"]}
+        self.init._cfg = {
+            "system_info": {"paths": {"cloud_dir": self.tmpdir}},
+            "network": {"config": ["fakesys_config"]},
+        }
         self.init.datasource = FakeDataSource(
-            network_config={'config': ['fakedatasource']})
+            network_config={"config": ["fakedatasource"]}
+        )
         self.assertEqual(
             (expected_cfg, NetworkConfigSource.cmdline),
-            self.init._find_networking_config())
+            self.init._find_networking_config(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_returns_initramfs(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns kernel cmdline config if present."""
-        expected_cfg = {'config': ['fake_initrd']}
+        expected_cfg = {"config": ["fake_initrd"]}
         m_cmdline.return_value = {}
         m_initramfs.return_value = expected_cfg
-        self.init._cfg = {'system_info': {'paths': {'cloud_dir': self.tmpdir}},
-                          'network': {'config': ['fakesys_config']}}
+        self.init._cfg = {
+            "system_info": {"paths": {"cloud_dir": self.tmpdir}},
+            "network": {"config": ["fakesys_config"]},
+        }
         self.init.datasource = FakeDataSource(
-            network_config={'config': ['fakedatasource']})
+            network_config={"config": ["fakedatasource"]}
+        )
         self.assertEqual(
             (expected_cfg, NetworkConfigSource.initramfs),
-            self.init._find_networking_config())
+            self.init._find_networking_config(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_returns_system_cfg(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns system config when present."""
         m_cmdline.return_value = {}  # No kernel network config
         m_initramfs.return_value = {}  # no initramfs network config
-        expected_cfg = {'config': ['fakesys_config']}
-        self.init._cfg = {'system_info': {'paths': {'cloud_dir': self.tmpdir}},
-                          'network': expected_cfg}
+        expected_cfg = {"config": ["fakesys_config"]}
+        self.init._cfg = {
+            "system_info": {"paths": {"cloud_dir": self.tmpdir}},
+            "network": expected_cfg,
+        }
         self.init.datasource = FakeDataSource(
-            network_config={'config': ['fakedatasource']})
+            network_config={"config": ["fakedatasource"]}
+        )
         self.assertEqual(
             (expected_cfg, NetworkConfigSource.system_cfg),
-            self.init._find_networking_config())
+            self.init._find_networking_config(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_returns_datasrc_cfg(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns datasource net config if present."""
         m_cmdline.return_value = {}  # No kernel network config
         m_initramfs.return_value = {}  # no initramfs network config
         # No system config for network in setUp
-        expected_cfg = {'config': ['fakedatasource']}
+        expected_cfg = {"config": ["fakedatasource"]}
         self.init.datasource = FakeDataSource(network_config=expected_cfg)
         self.assertEqual(
             (expected_cfg, NetworkConfigSource.ds),
-            self.init._find_networking_config())
+            self.init._find_networking_config(),
+        )
 
-    @mock.patch('cloudinit.stages.cmdline.read_initramfs_config')
-    @mock.patch('cloudinit.stages.cmdline.read_kernel_cmdline_config')
+    @mock.patch("cloudinit.stages.cmdline.read_initramfs_config")
+    @mock.patch("cloudinit.stages.cmdline.read_kernel_cmdline_config")
     def test_wb__find_networking_config_returns_fallback(
-            self, m_cmdline, m_initramfs):
+        self, m_cmdline, m_initramfs
+    ):
         """find_networking_config returns fallback config if not defined."""
         m_cmdline.return_value = {}  # Kernel doesn't disable networking
         m_initramfs.return_value = {}  # no initramfs network config
         # Neither datasource nor system_info disable or provide network
 
-        fake_cfg = {'config': [{'type': 'physical', 'name': 'eth9'}],
-                    'version': 1}
+        fake_cfg = {
+            "config": [{"type": "physical", "name": "eth9"}],
+            "version": 1,
+        }
 
         def fake_generate_fallback():
             return fake_cfg
@@ -259,13 +315,15 @@ class TestInit(CiTestCase):
         distro.generate_fallback_config = fake_generate_fallback
         self.assertEqual(
             (fake_cfg, NetworkConfigSource.fallback),
-            self.init._find_networking_config())
-        self.assertNotIn('network config disabled', self.logs.getvalue())
+            self.init._find_networking_config(),
+        )
+        self.assertNotIn("network config disabled", self.logs.getvalue())
 
     def test_apply_network_config_disabled(self):
         """Log when network is disabled by upgraded-network."""
         disable_file = os.path.join(
-            self.init.paths.get_cpath('data'), 'upgraded-network')
+            self.init.paths.get_cpath("data"), "upgraded-network"
+        )
 
         def fake_network_config():
             return (None, disable_file)
@@ -274,41 +332,58 @@ class TestInit(CiTestCase):
 
         self.init.apply_network_config(True)
         self.assertIn(
-            'INFO: network config is disabled by %s' % disable_file,
-            self.logs.getvalue())
+            "INFO: network config is disabled by %s" % disable_file,
+            self.logs.getvalue(),
+        )
 
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
-    @mock.patch('cloudinit.distros.ubuntu.Distro')
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
+    @mock.patch("cloudinit.distros.ubuntu.Distro")
     def test_apply_network_on_new_instance(self, m_ubuntu, m_macs):
         """Call distro apply_network_config methods on is_new_instance."""
         net_cfg = {
-            'version': 1, 'config': [
-                {'subnets': [{'type': 'dhcp'}], 'type': 'physical',
-                 'name': 'eth9', 'mac_address': '42:42:42:42:42:42'}]}
+            "version": 1,
+            "config": [
+                {
+                    "subnets": [{"type": "dhcp"}],
+                    "type": "physical",
+                    "name": "eth9",
+                    "mac_address": "42:42:42:42:42:42",
+                }
+            ],
+        }
 
         def fake_network_config():
             return net_cfg, NetworkConfigSource.fallback
 
-        m_macs.return_value = {'42:42:42:42:42:42': 'eth9'}
+        m_macs.return_value = {"42:42:42:42:42:42": "eth9"}
 
         self.init._find_networking_config = fake_network_config
 
         self.init.apply_network_config(True)
         self.init.distro.apply_network_config_names.assert_called_with(net_cfg)
         self.init.distro.apply_network_config.assert_called_with(
-            net_cfg, bring_up=True)
+            net_cfg, bring_up=True
+        )
 
-    @mock.patch('cloudinit.distros.ubuntu.Distro')
+    @mock.patch("cloudinit.distros.ubuntu.Distro")
     def test_apply_network_on_same_instance_id(self, m_ubuntu):
         """Only call distro.apply_network_config_names on same instance id."""
         self.init.is_new_instance = self._real_is_new_instance
         old_instance_id = os.path.join(
-            self.init.paths.get_cpath('data'), 'instance-id')
+            self.init.paths.get_cpath("data"), "instance-id"
+        )
         write_file(old_instance_id, TEST_INSTANCE_ID)
         net_cfg = {
-            'version': 1, 'config': [
-                {'subnets': [{'type': 'dhcp'}], 'type': 'physical',
-                 'name': 'eth9', 'mac_address': '42:42:42:42:42:42'}]}
+            "version": 1,
+            "config": [
+                {
+                    "subnets": [{"type": "dhcp"}],
+                    "type": "physical",
+                    "name": "eth9",
+                    "mac_address": "42:42:42:42:42:42",
+                }
+            ],
+        }
 
         def fake_network_config():
             return net_cfg, NetworkConfigSource.fallback
@@ -320,53 +395,65 @@ class TestInit(CiTestCase):
         self.init.distro.apply_network_config.assert_not_called()
         assert (
             "No network config applied. Neither a new instance nor datasource "
-            "network update allowed"
-        ) in self.logs.getvalue()
+            "network update allowed" in self.logs.getvalue()
+        )
 
     # CiTestCase doesn't work with pytest.mark.parametrize, and moving this
     # functionality to a separate class is more cumbersome than it'd be worth
     # at the moment, so use this as a simple setup
     def _apply_network_setup(self, m_macs):
         old_instance_id = os.path.join(
-            self.init.paths.get_cpath('data'), 'instance-id')
+            self.init.paths.get_cpath("data"), "instance-id"
+        )
         write_file(old_instance_id, TEST_INSTANCE_ID)
         net_cfg = {
-            'version': 1, 'config': [
-                {'subnets': [{'type': 'dhcp'}], 'type': 'physical',
-                 'name': 'eth9', 'mac_address': '42:42:42:42:42:42'}]}
+            "version": 1,
+            "config": [
+                {
+                    "subnets": [{"type": "dhcp"}],
+                    "type": "physical",
+                    "name": "eth9",
+                    "mac_address": "42:42:42:42:42:42",
+                }
+            ],
+        }
 
         def fake_network_config():
             return net_cfg, NetworkConfigSource.fallback
 
-        m_macs.return_value = {'42:42:42:42:42:42': 'eth9'}
+        m_macs.return_value = {"42:42:42:42:42:42": "eth9"}
 
         self.init._find_networking_config = fake_network_config
         self.init.datasource = FakeDataSource(paths=self.init.paths)
         self.init.is_new_instance = mock.Mock(return_value=False)
         return net_cfg
 
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
-    @mock.patch('cloudinit.distros.ubuntu.Distro')
-    @mock.patch.dict(sources.DataSource.default_update_events, {
-        EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE, EventType.BOOT}})
-    def test_apply_network_allowed_when_default_boot(
-        self, m_ubuntu, m_macs
-    ):
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
+    @mock.patch("cloudinit.distros.ubuntu.Distro")
+    @mock.patch.dict(
+        sources.DataSource.default_update_events,
+        {EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE, EventType.BOOT}},
+    )
+    def test_apply_network_allowed_when_default_boot(self, m_ubuntu, m_macs):
         """Apply network if datasource permits BOOT event."""
         net_cfg = self._apply_network_setup(m_macs)
 
         self.init.apply_network_config(True)
-        assert mock.call(
-            net_cfg
-        ) == self.init.distro.apply_network_config_names.call_args_list[-1]
-        assert mock.call(
-            net_cfg, bring_up=True
-        ) == self.init.distro.apply_network_config.call_args_list[-1]
-
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
-    @mock.patch('cloudinit.distros.ubuntu.Distro')
-    @mock.patch.dict(sources.DataSource.default_update_events, {
-        EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}})
+        assert (
+            mock.call(net_cfg)
+            == self.init.distro.apply_network_config_names.call_args_list[-1]
+        )
+        assert (
+            mock.call(net_cfg, bring_up=True)
+            == self.init.distro.apply_network_config.call_args_list[-1]
+        )
+
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
+    @mock.patch("cloudinit.distros.ubuntu.Distro")
+    @mock.patch.dict(
+        sources.DataSource.default_update_events,
+        {EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}},
+    )
     def test_apply_network_disabled_when_no_default_boot(
         self, m_ubuntu, m_macs
     ):
@@ -376,45 +463,47 @@ class TestInit(CiTestCase):
         self.init.distro.apply_network_config.assert_not_called()
         assert (
             "No network config applied. Neither a new instance nor datasource "
-            "network update allowed"
-        ) in self.logs.getvalue()
-
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
-    @mock.patch('cloudinit.distros.ubuntu.Distro')
-    @mock.patch.dict(sources.DataSource.default_update_events, {
-        EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}})
+            "network update allowed" in self.logs.getvalue()
+        )
+
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
+    @mock.patch("cloudinit.distros.ubuntu.Distro")
+    @mock.patch.dict(
+        sources.DataSource.default_update_events,
+        {EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}},
+    )
     def test_apply_network_allowed_with_userdata_overrides(
         self, m_ubuntu, m_macs
     ):
         """Apply network if userdata overrides default config"""
         net_cfg = self._apply_network_setup(m_macs)
-        self.init._cfg = {'updates': {'network': {'when': ['boot']}}}
+        self.init._cfg = {"updates": {"network": {"when": ["boot"]}}}
         self.init.apply_network_config(True)
-        self.init.distro.apply_network_config_names.assert_called_with(
-            net_cfg)
+        self.init.distro.apply_network_config_names.assert_called_with(net_cfg)
         self.init.distro.apply_network_config.assert_called_with(
-            net_cfg, bring_up=True)
-
-    @mock.patch('cloudinit.net.get_interfaces_by_mac')
-    @mock.patch('cloudinit.distros.ubuntu.Distro')
-    @mock.patch.dict(sources.DataSource.supported_update_events, {
-        EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}})
-    def test_apply_network_disabled_when_unsupported(
-        self, m_ubuntu, m_macs
-    ):
+            net_cfg, bring_up=True
+        )
+
+    @mock.patch("cloudinit.net.get_interfaces_by_mac")
+    @mock.patch("cloudinit.distros.ubuntu.Distro")
+    @mock.patch.dict(
+        sources.DataSource.supported_update_events,
+        {EventScope.NETWORK: {EventType.BOOT_NEW_INSTANCE}},
+    )
+    def test_apply_network_disabled_when_unsupported(self, m_ubuntu, m_macs):
         """Don't apply network config if unsupported.
 
         Shouldn't work even when specified as userdata
         """
         self._apply_network_setup(m_macs)
 
-        self.init._cfg = {'updates': {'network': {'when': ['boot']}}}
+        self.init._cfg = {"updates": {"network": {"when": ["boot"]}}}
         self.init.apply_network_config(True)
         self.init.distro.apply_network_config.assert_not_called()
         assert (
             "No network config applied. Neither a new instance nor datasource "
-            "network update allowed"
-        ) in self.logs.getvalue()
+            "network update allowed" in self.logs.getvalue()
+        )
 
 
 class TestInit_InitializeFilesystem:
@@ -475,4 +564,5 @@ class TestInit_InitializeFilesystem:
 
         assert mode == stat.S_IMODE(log_file.stat().mode)
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_subp.py b/tests/unittests/test_subp.py
index 572510d7..7cd1339b 100644
--- a/tests/unittests/test_subp.py
+++ b/tests/unittests/test_subp.py
@@ -4,17 +4,15 @@
 
 import json
 import os
-import sys
 import stat
-
+import sys
 from unittest import mock
 
 from cloudinit import subp, util
 from tests.unittests.helpers import CiTestCase, get_top_level_dir
 
-
-BASH = subp.which('bash')
-BOGUS_COMMAND = 'this-is-not-expected-to-be-a-program-name'
+BASH = subp.which("bash")
+BOGUS_COMMAND = "this-is-not-expected-to-be-a-program-name"
 
 
 class TestPrependBaseCommands(CiTestCase):
@@ -23,177 +21,231 @@ class TestPrependBaseCommands(CiTestCase):
 
     def test_prepend_base_command_errors_on_neither_string_nor_list(self):
         """Raise an error for each command which is not a string or list."""
-        orig_commands = ['ls', 1, {'not': 'gonna work'}, ['basecmd', 'list']]
+        orig_commands = ["ls", 1, {"not": "gonna work"}, ["basecmd", "list"]]
         with self.assertRaises(TypeError) as context_manager:
             subp.prepend_base_command(
-                base_command='basecmd', commands=orig_commands)
+                base_command="basecmd", commands=orig_commands
+            )
         self.assertEqual(
             "Invalid basecmd config. These commands are not a string or"
             " list:\n1\n{'not': 'gonna work'}",
-            str(context_manager.exception))
+            str(context_manager.exception),
+        )
 
     def test_prepend_base_command_warns_on_non_base_string_commands(self):
         """Warn on each non-base for commands of type string."""
         orig_commands = [
-            'ls', 'basecmd list', 'touch /blah', 'basecmd install x']
+            "ls",
+            "basecmd list",
+            "touch /blah",
+            "basecmd install x",
+        ]
         fixed_commands = subp.prepend_base_command(
-            base_command='basecmd', commands=orig_commands)
+            base_command="basecmd", commands=orig_commands
+        )
         self.assertEqual(
-            'WARNING: Non-basecmd commands in basecmd config:\n'
-            'ls\ntouch /blah\n',
-            self.logs.getvalue())
+            "WARNING: Non-basecmd commands in basecmd config:\n"
+            "ls\ntouch /blah\n",
+            self.logs.getvalue(),
+        )
         self.assertEqual(orig_commands, fixed_commands)
 
     def test_prepend_base_command_prepends_on_non_base_list_commands(self):
         """Prepend 'basecmd' for each non-basecmd command of type list."""
-        orig_commands = [['ls'], ['basecmd', 'list'], ['basecmda', '/blah'],
-                         ['basecmd', 'install', 'x']]
-        expected = [['basecmd', 'ls'], ['basecmd', 'list'],
-                    ['basecmd', 'basecmda', '/blah'],
-                    ['basecmd', 'install', 'x']]
+        orig_commands = [
+            ["ls"],
+            ["basecmd", "list"],
+            ["basecmda", "/blah"],
+            ["basecmd", "install", "x"],
+        ]
+        expected = [
+            ["basecmd", "ls"],
+            ["basecmd", "list"],
+            ["basecmd", "basecmda", "/blah"],
+            ["basecmd", "install", "x"],
+        ]
         fixed_commands = subp.prepend_base_command(
-            base_command='basecmd', commands=orig_commands)
-        self.assertEqual('', self.logs.getvalue())
+            base_command="basecmd", commands=orig_commands
+        )
+        self.assertEqual("", self.logs.getvalue())
         self.assertEqual(expected, fixed_commands)
 
     def test_prepend_base_command_removes_first_item_when_none(self):
         """Remove the first element of a non-basecmd when it is None."""
-        orig_commands = [[None, 'ls'], ['basecmd', 'list'],
-                         [None, 'touch', '/blah'],
-                         ['basecmd', 'install', 'x']]
-        expected = [['ls'], ['basecmd', 'list'],
-                    ['touch', '/blah'],
-                    ['basecmd', 'install', 'x']]
+        orig_commands = [
+            [None, "ls"],
+            ["basecmd", "list"],
+            [None, "touch", "/blah"],
+            ["basecmd", "install", "x"],
+        ]
+        expected = [
+            ["ls"],
+            ["basecmd", "list"],
+            ["touch", "/blah"],
+            ["basecmd", "install", "x"],
+        ]
         fixed_commands = subp.prepend_base_command(
-            base_command='basecmd', commands=orig_commands)
-        self.assertEqual('', self.logs.getvalue())
+            base_command="basecmd", commands=orig_commands
+        )
+        self.assertEqual("", self.logs.getvalue())
         self.assertEqual(expected, fixed_commands)
 
 
 class TestSubp(CiTestCase):
-    allowed_subp = [BASH, 'cat', CiTestCase.SUBP_SHELL_TRUE,
-                    BOGUS_COMMAND, sys.executable]
-
-    stdin2err = [BASH, '-c', 'cat >&2']
-    stdin2out = ['cat']
-    utf8_invalid = b'ab\xaadef'
-    utf8_valid = b'start \xc3\xa9 end'
-    utf8_valid_2 = b'd\xc3\xa9j\xc8\xa7'
-    printenv = [BASH, '-c', 'for n in "$@"; do echo "$n=${!n}"; done', '--']
+    allowed_subp = [
+        BASH,
+        "cat",
+        CiTestCase.SUBP_SHELL_TRUE,
+        BOGUS_COMMAND,
+        sys.executable,
+    ]
+
+    stdin2err = [BASH, "-c", "cat >&2"]
+    stdin2out = ["cat"]
+    utf8_invalid = b"ab\xaadef"
+    utf8_valid = b"start \xc3\xa9 end"
+    utf8_valid_2 = b"d\xc3\xa9j\xc8\xa7"
+    printenv = [BASH, "-c", 'for n in "$@"; do echo "$n=${!n}"; done', "--"]
 
     def printf_cmd(self, *args):
         # bash's printf supports \xaa.  So does /usr/bin/printf
         # but by using bash, we remove dependency on another program.
-        return([BASH, '-c', 'printf "$@"', 'printf'] + list(args))
+        return [BASH, "-c", 'printf "$@"', "printf"] + list(args)
 
     def test_subp_handles_bytestrings(self):
         """subp can run a bytestring command if shell is True."""
-        tmp_file = self.tmp_path('test.out')
-        cmd = 'echo HI MOM >> {tmp_file}'.format(tmp_file=tmp_file)
-        (out, _err) = subp.subp(cmd.encode('utf-8'), shell=True)
-        self.assertEqual('', out)
-        self.assertEqual('', _err)
-        self.assertEqual('HI MOM\n', util.load_file(tmp_file))
+        tmp_file = self.tmp_path("test.out")
+        cmd = "echo HI MOM >> {tmp_file}".format(tmp_file=tmp_file)
+        (out, _err) = subp.subp(cmd.encode("utf-8"), shell=True)
+        self.assertEqual("", out)
+        self.assertEqual("", _err)
+        self.assertEqual("HI MOM\n", util.load_file(tmp_file))
 
     def test_subp_handles_strings(self):
         """subp can run a string command if shell is True."""
-        tmp_file = self.tmp_path('test.out')
-        cmd = 'echo HI MOM >> {tmp_file}'.format(tmp_file=tmp_file)
+        tmp_file = self.tmp_path("test.out")
+        cmd = "echo HI MOM >> {tmp_file}".format(tmp_file=tmp_file)
         (out, _err) = subp.subp(cmd, shell=True)
-        self.assertEqual('', out)
-        self.assertEqual('', _err)
-        self.assertEqual('HI MOM\n', util.load_file(tmp_file))
+        self.assertEqual("", out)
+        self.assertEqual("", _err)
+        self.assertEqual("HI MOM\n", util.load_file(tmp_file))
 
     def test_subp_handles_utf8(self):
         # The given bytes contain utf-8 accented characters as seen in e.g.
         # the "deja dup" package in Ubuntu.
         cmd = self.printf_cmd(self.utf8_valid_2)
         (out, _err) = subp.subp(cmd, capture=True)
-        self.assertEqual(out, self.utf8_valid_2.decode('utf-8'))
+        self.assertEqual(out, self.utf8_valid_2.decode("utf-8"))
 
     def test_subp_respects_decode_false(self):
-        (out, err) = subp.subp(self.stdin2out, capture=True, decode=False,
-                               data=self.utf8_valid)
+        (out, err) = subp.subp(
+            self.stdin2out, capture=True, decode=False, data=self.utf8_valid
+        )
         self.assertTrue(isinstance(out, bytes))
         self.assertTrue(isinstance(err, bytes))
         self.assertEqual(out, self.utf8_valid)
 
     def test_subp_decode_ignore(self):
         # this executes a string that writes invalid utf-8 to stdout
-        (out, _err) = subp.subp(self.printf_cmd('abc\\xaadef'),
-                                capture=True, decode='ignore')
-        self.assertEqual(out, 'abcdef')
+        (out, _err) = subp.subp(
+            self.printf_cmd("abc\\xaadef"), capture=True, decode="ignore"
+        )
+        self.assertEqual(out, "abcdef")
 
     def test_subp_decode_strict_valid_utf8(self):
-        (out, _err) = subp.subp(self.stdin2out, capture=True,
-                                decode='strict', data=self.utf8_valid)
-        self.assertEqual(out, self.utf8_valid.decode('utf-8'))
+        (out, _err) = subp.subp(
+            self.stdin2out, capture=True, decode="strict", data=self.utf8_valid
+        )
+        self.assertEqual(out, self.utf8_valid.decode("utf-8"))
 
     def test_subp_decode_invalid_utf8_replaces(self):
-        (out, _err) = subp.subp(self.stdin2out, capture=True,
-                                data=self.utf8_invalid)
-        expected = self.utf8_invalid.decode('utf-8', 'replace')
+        (out, _err) = subp.subp(
+            self.stdin2out, capture=True, data=self.utf8_invalid
+        )
+        expected = self.utf8_invalid.decode("utf-8", "replace")
         self.assertEqual(out, expected)
 
     def test_subp_decode_strict_raises(self):
         args = []
-        kwargs = {'args': self.stdin2out, 'capture': True,
-                  'decode': 'strict', 'data': self.utf8_invalid}
+        kwargs = {
+            "args": self.stdin2out,
+            "capture": True,
+            "decode": "strict",
+            "data": self.utf8_invalid,
+        }
         self.assertRaises(UnicodeDecodeError, subp.subp, *args, **kwargs)
 
     def test_subp_capture_stderr(self):
-        data = b'hello world'
-        (out, err) = subp.subp(self.stdin2err, capture=True,
-                               decode=False, data=data,
-                               update_env={'LC_ALL': 'C'})
+        data = b"hello world"
+        (out, err) = subp.subp(
+            self.stdin2err,
+            capture=True,
+            decode=False,
+            data=data,
+            update_env={"LC_ALL": "C"},
+        )
         self.assertEqual(err, data)
-        self.assertEqual(out, b'')
+        self.assertEqual(out, b"")
 
     def test_subp_reads_env(self):
-        with mock.patch.dict("os.environ", values={'FOO': 'BAR'}):
-            out, _err = subp.subp(self.printenv + ['FOO'], capture=True)
-        self.assertEqual('FOO=BAR', out.splitlines()[0])
+        with mock.patch.dict("os.environ", values={"FOO": "BAR"}):
+            out, _err = subp.subp(self.printenv + ["FOO"], capture=True)
+        self.assertEqual("FOO=BAR", out.splitlines()[0])
 
     def test_subp_env_and_update_env(self):
         out, _err = subp.subp(
-            self.printenv + ['FOO', 'HOME', 'K1', 'K2'], capture=True,
-            env={'FOO': 'BAR'},
-            update_env={'HOME': '/myhome', 'K2': 'V2'})
+            self.printenv + ["FOO", "HOME", "K1", "K2"],
+            capture=True,
+            env={"FOO": "BAR"},
+            update_env={"HOME": "/myhome", "K2": "V2"},
+        )
         self.assertEqual(
-            ['FOO=BAR', 'HOME=/myhome', 'K1=', 'K2=V2'], out.splitlines())
+            ["FOO=BAR", "HOME=/myhome", "K1=", "K2=V2"], out.splitlines()
+        )
 
     def test_subp_update_env(self):
-        extra = {'FOO': 'BAR', 'HOME': '/root', 'K1': 'V1'}
+        extra = {"FOO": "BAR", "HOME": "/root", "K1": "V1"}
         with mock.patch.dict("os.environ", values=extra):
             out, _err = subp.subp(
-                self.printenv + ['FOO', 'HOME', 'K1', 'K2'], capture=True,
-                update_env={'HOME': '/myhome', 'K2': 'V2'})
+                self.printenv + ["FOO", "HOME", "K1", "K2"],
+                capture=True,
+                update_env={"HOME": "/myhome", "K2": "V2"},
+            )
 
         self.assertEqual(
-            ['FOO=BAR', 'HOME=/myhome', 'K1=V1', 'K2=V2'], out.splitlines())
+            ["FOO=BAR", "HOME=/myhome", "K1=V1", "K2=V2"], out.splitlines()
+        )
 
     def test_subp_warn_missing_shebang(self):
         """Warn on no #! in script"""
-        noshebang = self.tmp_path('noshebang')
-        util.write_file(noshebang, 'true\n')
+        noshebang = self.tmp_path("noshebang")
+        util.write_file(noshebang, "true\n")
 
         print("os is %s" % os)
         os.chmod(noshebang, os.stat(noshebang).st_mode | stat.S_IEXEC)
         with self.allow_subp([noshebang]):
-            self.assertRaisesRegex(subp.ProcessExecutionError,
-                                   r'Missing #! in script\?',
-                                   subp.subp, (noshebang,))
+            self.assertRaisesRegex(
+                subp.ProcessExecutionError,
+                r"Missing #! in script\?",
+                subp.subp,
+                (noshebang,),
+            )
 
     def test_subp_combined_stderr_stdout(self):
         """Providing combine_capture as True redirects stderr to stdout."""
-        data = b'hello world'
-        (out, err) = subp.subp(self.stdin2err, capture=True,
-                               combine_capture=True, decode=False, data=data)
-        self.assertEqual(b'', err)
+        data = b"hello world"
+        (out, err) = subp.subp(
+            self.stdin2err,
+            capture=True,
+            combine_capture=True,
+            decode=False,
+            data=data,
+        )
+        self.assertEqual(b"", err)
         self.assertEqual(data, out)
 
     def test_returns_none_if_no_capture(self):
-        (out, err) = subp.subp(self.stdin2out, data=b'', capture=False)
+        (out, err) = subp.subp(self.stdin2out, data=b"", capture=False)
         self.assertIsNone(err)
         self.assertIsNone(out)
 
@@ -212,10 +264,12 @@ class TestSubp(CiTestCase):
         self.assertTrue(isinstance(cm.exception.stderr, str))
 
     def test_bunch_of_slashes_in_path(self):
-        self.assertEqual("/target/my/path/",
-                         subp.target_path("/target/", "//my/path/"))
-        self.assertEqual("/target/my/path/",
-                         subp.target_path("/target/", "///my/path/"))
+        self.assertEqual(
+            "/target/my/path/", subp.target_path("/target/", "//my/path/")
+        )
+        self.assertEqual(
+            "/target/my/path/", subp.target_path("/target/", "///my/path/")
+        )
 
     def test_c_lang_can_take_utf8_args(self):
         """Independent of system LC_CTYPE, args can contain utf-8 strings.
@@ -232,25 +286,32 @@ class TestSubp(CiTestCase):
         the default encoding will be set to ascii.  In such an environment
         Popen(['command', 'non-ascii-arg']) would cause a UnicodeDecodeError.
         """
-        python_prog = '\n'.join(
+        python_prog = "\n".join(
             [
-                'import json, sys',
+                "import json, sys",
                 'sys.path.insert(0, "{}")'.format(get_top_level_dir()),
-                'from cloudinit.subp import subp',
-                'data = sys.stdin.read()',
-                'cmd = json.loads(data)',
-                'subp(cmd, capture=False)',
-                '',
+                "from cloudinit.subp import subp",
+                "data = sys.stdin.read()",
+                "cmd = json.loads(data)",
+                "subp(cmd, capture=False)",
+                "",
             ]
         )
-        cmd = [BASH, '-c', 'echo -n "$@"', '--',
-               self.utf8_valid.decode("utf-8")]
-        python_subp = [sys.executable, '-c', python_prog]
+        cmd = [
+            BASH,
+            "-c",
+            'echo -n "$@"',
+            "--",
+            self.utf8_valid.decode("utf-8"),
+        ]
+        python_subp = [sys.executable, "-c", python_prog]
 
         out, _err = subp.subp(
-            python_subp, update_env={'LC_CTYPE': 'C'},
+            python_subp,
+            update_env={"LC_CTYPE": "C"},
             data=json.dumps(cmd).encode("utf-8"),
-            decode=False)
+            decode=False,
+        )
         self.assertEqual(self.utf8_valid, out)
 
     def test_bogus_command_logs_status_messages(self):
@@ -264,8 +325,9 @@ class TestSubp(CiTestCase):
             subp.subp([BOGUS_COMMAND], status_cb=status_cb)
 
         expected = [
-            'Begin run command: {cmd}\n'.format(cmd=BOGUS_COMMAND),
-            'ERROR: End run command: invalid command provided\n']
+            "Begin run command: {cmd}\n".format(cmd=BOGUS_COMMAND),
+            "ERROR: End run command: invalid command provided\n",
+        ]
         self.assertEqual(expected, logs)
 
     def test_command_logs_exit_codes_to_status_cb(self):
@@ -276,14 +338,15 @@ class TestSubp(CiTestCase):
             logs.append(log)
 
         with self.assertRaises(subp.ProcessExecutionError):
-            subp.subp([BASH, '-c', 'exit 2'], status_cb=status_cb)
-        subp.subp([BASH, '-c', 'exit 0'], status_cb=status_cb)
+            subp.subp([BASH, "-c", "exit 2"], status_cb=status_cb)
+        subp.subp([BASH, "-c", "exit 0"], status_cb=status_cb)
 
         expected = [
-            'Begin run command: %s -c exit 2\n' % BASH,
-            'ERROR: End run command: exit(2)\n',
-            'Begin run command: %s -c exit 0\n' % BASH,
-            'End run command: exit(0)\n']
+            "Begin run command: %s -c exit 2\n" % BASH,
+            "ERROR: End run command: exit(2)\n",
+            "Begin run command: %s -c exit 0\n" % BASH,
+            "End run command: exit(0)\n",
+        ]
         self.assertEqual(expected, logs)
 
 
diff --git a/tests/unittests/test_temp_utils.py b/tests/unittests/test_temp_utils.py
index 9d56d0d0..e91f389b 100644
--- a/tests/unittests/test_temp_utils.py
+++ b/tests/unittests/test_temp_utils.py
@@ -2,30 +2,33 @@
 
 """Tests for cloudinit.temp_utils"""
 
+import os
+
 from cloudinit.temp_utils import mkdtemp, mkstemp, tempdir
 from tests.unittests.helpers import CiTestCase, wrap_and_call
-import os
 
 
 class TestTempUtils(CiTestCase):
-
     def test_mkdtemp_default_non_root(self):
         """mkdtemp creates a dir under /tmp for the unprivileged."""
         calls = []
 
         def fake_mkdtemp(*args, **kwargs):
             calls.append(kwargs)
-            return '/fake/return/path'
+            return "/fake/return/path"
 
         retval = wrap_and_call(
-            'cloudinit.temp_utils',
-            {'os.getuid': 1000,
-             'tempfile.mkdtemp': {'side_effect': fake_mkdtemp},
-             '_TMPDIR': {'new': None},
-             'os.path.isdir': True},
-            mkdtemp)
-        self.assertEqual('/fake/return/path', retval)
-        self.assertEqual([{'dir': '/tmp'}], calls)
+            "cloudinit.temp_utils",
+            {
+                "os.getuid": 1000,
+                "tempfile.mkdtemp": {"side_effect": fake_mkdtemp},
+                "_TMPDIR": {"new": None},
+                "os.path.isdir": True,
+            },
+            mkdtemp,
+        )
+        self.assertEqual("/fake/return/path", retval)
+        self.assertEqual([{"dir": "/tmp"}], calls)
 
     def test_mkdtemp_default_non_root_needs_exe(self):
         """mkdtemp creates a dir under /var/tmp/cloud-init when needs_exe."""
@@ -33,17 +36,21 @@ class TestTempUtils(CiTestCase):
 
         def fake_mkdtemp(*args, **kwargs):
             calls.append(kwargs)
-            return '/fake/return/path'
+            return "/fake/return/path"
 
         retval = wrap_and_call(
-            'cloudinit.temp_utils',
-            {'os.getuid': 1000,
-             'tempfile.mkdtemp': {'side_effect': fake_mkdtemp},
-             '_TMPDIR': {'new': None},
-             'os.path.isdir': True},
-            mkdtemp, needs_exe=True)
-        self.assertEqual('/fake/return/path', retval)
-        self.assertEqual([{'dir': '/var/tmp/cloud-init'}], calls)
+            "cloudinit.temp_utils",
+            {
+                "os.getuid": 1000,
+                "tempfile.mkdtemp": {"side_effect": fake_mkdtemp},
+                "_TMPDIR": {"new": None},
+                "os.path.isdir": True,
+            },
+            mkdtemp,
+            needs_exe=True,
+        )
+        self.assertEqual("/fake/return/path", retval)
+        self.assertEqual([{"dir": "/var/tmp/cloud-init"}], calls)
 
     def test_mkdtemp_default_root(self):
         """mkdtemp creates a dir under /run/cloud-init for the privileged."""
@@ -51,17 +58,20 @@ class TestTempUtils(CiTestCase):
 
         def fake_mkdtemp(*args, **kwargs):
             calls.append(kwargs)
-            return '/fake/return/path'
+            return "/fake/return/path"
 
         retval = wrap_and_call(
-            'cloudinit.temp_utils',
-            {'os.getuid': 0,
-             'tempfile.mkdtemp': {'side_effect': fake_mkdtemp},
-             '_TMPDIR': {'new': None},
-             'os.path.isdir': True},
-            mkdtemp)
-        self.assertEqual('/fake/return/path', retval)
-        self.assertEqual([{'dir': '/run/cloud-init/tmp'}], calls)
+            "cloudinit.temp_utils",
+            {
+                "os.getuid": 0,
+                "tempfile.mkdtemp": {"side_effect": fake_mkdtemp},
+                "_TMPDIR": {"new": None},
+                "os.path.isdir": True,
+            },
+            mkdtemp,
+        )
+        self.assertEqual("/fake/return/path", retval)
+        self.assertEqual([{"dir": "/run/cloud-init/tmp"}], calls)
 
     def test_mkstemp_default_non_root(self):
         """mkstemp creates secure tempfile under /tmp for the unprivileged."""
@@ -69,17 +79,20 @@ class TestTempUtils(CiTestCase):
 
         def fake_mkstemp(*args, **kwargs):
             calls.append(kwargs)
-            return '/fake/return/path'
+            return "/fake/return/path"
 
         retval = wrap_and_call(
-            'cloudinit.temp_utils',
-            {'os.getuid': 1000,
-             'tempfile.mkstemp': {'side_effect': fake_mkstemp},
-             '_TMPDIR': {'new': None},
-             'os.path.isdir': True},
-            mkstemp)
-        self.assertEqual('/fake/return/path', retval)
-        self.assertEqual([{'dir': '/tmp'}], calls)
+            "cloudinit.temp_utils",
+            {
+                "os.getuid": 1000,
+                "tempfile.mkstemp": {"side_effect": fake_mkstemp},
+                "_TMPDIR": {"new": None},
+                "os.path.isdir": True,
+            },
+            mkstemp,
+        )
+        self.assertEqual("/fake/return/path", retval)
+        self.assertEqual([{"dir": "/tmp"}], calls)
 
     def test_mkstemp_default_root(self):
         """mkstemp creates a secure tempfile in /run/cloud-init for root."""
@@ -87,31 +100,36 @@ class TestTempUtils(CiTestCase):
 
         def fake_mkstemp(*args, **kwargs):
             calls.append(kwargs)
-            return '/fake/return/path'
+            return "/fake/return/path"
 
         retval = wrap_and_call(
-            'cloudinit.temp_utils',
-            {'os.getuid': 0,
-             'tempfile.mkstemp': {'side_effect': fake_mkstemp},
-             '_TMPDIR': {'new': None},
-             'os.path.isdir': True},
-            mkstemp)
-        self.assertEqual('/fake/return/path', retval)
-        self.assertEqual([{'dir': '/run/cloud-init/tmp'}], calls)
+            "cloudinit.temp_utils",
+            {
+                "os.getuid": 0,
+                "tempfile.mkstemp": {"side_effect": fake_mkstemp},
+                "_TMPDIR": {"new": None},
+                "os.path.isdir": True,
+            },
+            mkstemp,
+        )
+        self.assertEqual("/fake/return/path", retval)
+        self.assertEqual([{"dir": "/run/cloud-init/tmp"}], calls)
 
     def test_tempdir_error_suppression(self):
         """test tempdir suppresses errors during directory removal."""
 
         with self.assertRaises(OSError):
-            with tempdir(prefix='cloud-init-dhcp-') as tdir:
+            with tempdir(prefix="cloud-init-dhcp-") as tdir:
                 os.rmdir(tdir)
                 # As a result, the directory is already gone,
                 # so shutil.rmtree should raise OSError
 
-        with tempdir(rmtree_ignore_errors=True,
-                     prefix='cloud-init-dhcp-') as tdir:
+        with tempdir(
+            rmtree_ignore_errors=True, prefix="cloud-init-dhcp-"
+        ) as tdir:
             os.rmdir(tdir)
             # Since the directory is already gone, shutil.rmtree would raise
             # OSError, but we suppress that
 
+
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_templating.py b/tests/unittests/test_templating.py
index 459e017b..c1fec27c 100644
--- a/tests/unittests/test_templating.py
+++ b/tests/unittests/test_templating.py
@@ -4,14 +4,15 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from tests.unittests import helpers as test_helpers
 import textwrap
 
 from cloudinit import templater
 from cloudinit.util import load_file, write_file
+from tests.unittests import helpers as test_helpers
 
 try:
     import Cheetah
+
     HAS_CHEETAH = True
     c = Cheetah  # make pyflakes and pylint happy, as Cheetah is not used here
 except ImportError:
@@ -22,32 +23,36 @@ class TestTemplates(test_helpers.CiTestCase):
 
     with_logs = True
 
-    jinja_utf8 = b'It\xe2\x80\x99s not ascii, {{name}}\n'
-    jinja_utf8_rbob = b'It\xe2\x80\x99s not ascii, bob\n'.decode('utf-8')
+    jinja_utf8 = b"It\xe2\x80\x99s not ascii, {{name}}\n"
+    jinja_utf8_rbob = b"It\xe2\x80\x99s not ascii, bob\n".decode("utf-8")
 
     @staticmethod
     def add_header(renderer, data):
         """Return text (py2 unicode/py3 str) with template header."""
         if isinstance(data, bytes):
-            data = data.decode('utf-8')
+            data = data.decode("utf-8")
         return "## template: %s\n" % renderer + data
 
     def test_render_basic(self):
-        in_data = textwrap.dedent("""
+        in_data = textwrap.dedent(
+            """
             ${b}
 
             c = d
-            """)
+            """
+        )
         in_data = in_data.strip()
-        expected_data = textwrap.dedent("""
+        expected_data = textwrap.dedent(
+            """
             2
 
             c = d
-            """)
-        out_data = templater.basic_render(in_data, {'b': 2})
+            """
+        )
+        out_data = templater.basic_render(in_data, {"b": 2})
         self.assertEqual(expected_data.strip(), out_data)
 
-    @test_helpers.skipIf(not HAS_CHEETAH, 'cheetah renderer not available')
+    @test_helpers.skipIf(not HAS_CHEETAH, "cheetah renderer not available")
     def test_detection(self):
         blob = "## template:cheetah"
 
@@ -60,28 +65,28 @@ class TestTemplates(test_helpers.CiTestCase):
         self.assertIn("cheetah", template_type)
         self.assertEqual(blob, contents)
 
-        blob = '##template:something-new'
+        blob = "##template:something-new"
         self.assertRaises(ValueError, templater.detect_template, blob)
 
     def test_render_cheetah(self):
-        blob = '''## template:cheetah
-$a,$b'''
+        blob = """## template:cheetah
+$a,$b"""
         c = templater.render_string(blob, {"a": 1, "b": 2})
         self.assertEqual("1,2", c)
 
     def test_render_jinja(self):
-        blob = '''## template:jinja
-{{a}},{{b}}'''
+        blob = """## template:jinja
+{{a}},{{b}}"""
         c = templater.render_string(blob, {"a": 1, "b": 2})
         self.assertEqual("1,2", c)
 
     def test_render_default(self):
-        blob = '''$a,$b'''
+        blob = """$a,$b"""
         c = templater.render_string(blob, {"a": 1, "b": 2})
         self.assertEqual("1,2", c)
 
     def test_render_basic_deeper(self):
-        hn = 'myfoohost.yahoo.com'
+        hn = "myfoohost.yahoo.com"
         expected_data = "h=%s\nc=d\n" % hn
         in_data = "h=$hostname.canonical_name\nc=d\n"
         params = {
@@ -96,59 +101,69 @@ $a,$b'''
         hn = "myfoohost"
         in_data = "h=$hostname\nc=d\n"
         expected_data = "h=%s\nc=d\n" % hn
-        out_data = templater.basic_render(in_data, {'hostname': hn})
+        out_data = templater.basic_render(in_data, {"hostname": hn})
         self.assertEqual(expected_data, out_data)
 
     def test_render_basic_parens(self):
         hn = "myfoohost"
         in_data = "h = ${hostname}\nc=d\n"
         expected_data = "h = %s\nc=d\n" % hn
-        out_data = templater.basic_render(in_data, {'hostname': hn})
+        out_data = templater.basic_render(in_data, {"hostname": hn})
         self.assertEqual(expected_data, out_data)
 
     def test_render_basic2(self):
         mirror = "mymirror"
         codename = "zany"
         in_data = "deb $mirror $codename-updates main contrib non-free"
-        ex_data = "deb %s %s-updates main contrib non-free" % (mirror,
-                                                               codename)
-
-        out_data = templater.basic_render(in_data,
-                                          {'mirror': mirror,
-                                           'codename': codename})
+        ex_data = "deb %s %s-updates main contrib non-free" % (
+            mirror,
+            codename,
+        )
+
+        out_data = templater.basic_render(
+            in_data, {"mirror": mirror, "codename": codename}
+        )
         self.assertEqual(ex_data, out_data)
 
     def test_jinja_nonascii_render_to_string(self):
         """Test jinja render_to_string with non-ascii content."""
         self.assertEqual(
             templater.render_string(
-                self.add_header("jinja", self.jinja_utf8), {"name": "bob"}),
-            self.jinja_utf8_rbob)
+                self.add_header("jinja", self.jinja_utf8), {"name": "bob"}
+            ),
+            self.jinja_utf8_rbob,
+        )
 
     def test_jinja_nonascii_render_undefined_variables_to_default_py3(self):
         """Test py3 jinja render_to_string with undefined variable default."""
         self.assertEqual(
             templater.render_string(
-                self.add_header("jinja", self.jinja_utf8), {}),
-            self.jinja_utf8_rbob.replace('bob', 'CI_MISSING_JINJA_VAR/name'))
+                self.add_header("jinja", self.jinja_utf8), {}
+            ),
+            self.jinja_utf8_rbob.replace("bob", "CI_MISSING_JINJA_VAR/name"),
+        )
 
     def test_jinja_nonascii_render_to_file(self):
         """Test jinja render_to_file of a filename with non-ascii content."""
         tmpl_fn = self.tmp_path("j-render-to-file.template")
         out_fn = self.tmp_path("j-render-to-file.out")
-        write_file(filename=tmpl_fn, omode="wb",
-                   content=self.add_header(
-                       "jinja", self.jinja_utf8).encode('utf-8'))
+        write_file(
+            filename=tmpl_fn,
+            omode="wb",
+            content=self.add_header("jinja", self.jinja_utf8).encode("utf-8"),
+        )
         templater.render_to_file(tmpl_fn, out_fn, {"name": "bob"})
-        result = load_file(out_fn, decode=False).decode('utf-8')
+        result = load_file(out_fn, decode=False).decode("utf-8")
         self.assertEqual(result, self.jinja_utf8_rbob)
 
     def test_jinja_nonascii_render_from_file(self):
         """Test jinja render_from_file with non-ascii content."""
         tmpl_fn = self.tmp_path("j-render-from-file.template")
-        write_file(tmpl_fn, omode="wb",
-                   content=self.add_header(
-                       "jinja", self.jinja_utf8).encode('utf-8'))
+        write_file(
+            tmpl_fn,
+            omode="wb",
+            content=self.add_header("jinja", self.jinja_utf8).encode("utf-8"),
+        )
         result = templater.render_from_file(tmpl_fn, {"name": "bob"})
         self.assertEqual(result, self.jinja_utf8_rbob)
 
@@ -156,14 +171,18 @@ $a,$b'''
     def test_jinja_warns_on_missing_dep_and_uses_basic_renderer(self):
         """Test jinja render_from_file will fallback to basic renderer."""
         tmpl_fn = self.tmp_path("j-render-from-file.template")
-        write_file(tmpl_fn, omode="wb",
-                   content=self.add_header(
-                       "jinja", self.jinja_utf8).encode('utf-8'))
+        write_file(
+            tmpl_fn,
+            omode="wb",
+            content=self.add_header("jinja", self.jinja_utf8).encode("utf-8"),
+        )
         result = templater.render_from_file(tmpl_fn, {"name": "bob"})
         self.assertEqual(result, self.jinja_utf8.decode())
         self.assertIn(
-            'WARNING: Jinja not available as the selected renderer for desired'
-            ' template, reverting to the basic renderer.',
-            self.logs.getvalue())
+            "WARNING: Jinja not available as the selected renderer for desired"
+            " template, reverting to the basic renderer.",
+            self.logs.getvalue(),
+        )
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_url_helper.py b/tests/unittests/test_url_helper.py
index 501d9533..85810e00 100644
--- a/tests/unittests/test_url_helper.py
+++ b/tests/unittests/test_url_helper.py
@@ -1,54 +1,63 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
-from cloudinit.url_helper import (
-    NOT_FOUND, UrlError, REDACTED, oauth_headers, read_file_or_url,
-    retry_on_url_exc)
-from tests.unittests.helpers import CiTestCase, mock, skipIf
-from cloudinit import util
-from cloudinit import version
+import logging
 
 import httpretty
-import logging
 import requests
 
+from cloudinit import util, version
+from cloudinit.url_helper import (
+    NOT_FOUND,
+    REDACTED,
+    UrlError,
+    oauth_headers,
+    read_file_or_url,
+    retry_on_url_exc,
+)
+from tests.unittests.helpers import CiTestCase, mock, skipIf
 
 try:
     import oauthlib
+
     assert oauthlib  # avoid pyflakes error F401: import unused
     _missing_oauthlib_dep = False
 except ImportError:
     _missing_oauthlib_dep = True
 
 
-M_PATH = 'cloudinit.url_helper.'
+M_PATH = "cloudinit.url_helper."
 
 
 class TestOAuthHeaders(CiTestCase):
-
     def test_oauth_headers_raises_not_implemented_when_oathlib_missing(self):
         """oauth_headers raises a NotImplemented error when oauth absent."""
-        with mock.patch.dict('sys.modules', {'oauthlib': None}):
+        with mock.patch.dict("sys.modules", {"oauthlib": None}):
             with self.assertRaises(NotImplementedError) as context_manager:
                 oauth_headers(1, 2, 3, 4, 5)
         self.assertEqual(
-            'oauth support is not available',
-            str(context_manager.exception))
+            "oauth support is not available", str(context_manager.exception)
+        )
 
     @skipIf(_missing_oauthlib_dep, "No python-oauthlib dependency")
-    @mock.patch('oauthlib.oauth1.Client')
+    @mock.patch("oauthlib.oauth1.Client")
     def test_oauth_headers_calls_oathlibclient_when_available(self, m_client):
         """oauth_headers calls oaut1.hClient.sign with the provided url."""
+
         class fakeclient(object):
             def sign(self, url):
                 # The first and 3rd item of the client.sign tuple are ignored
-                return ('junk', url, 'junk2')
+                return ("junk", url, "junk2")
 
         m_client.return_value = fakeclient()
 
         return_value = oauth_headers(
-            'url', 'consumer_key', 'token_key', 'token_secret',
-            'consumer_secret')
-        self.assertEqual('url', return_value)
+            "url",
+            "consumer_key",
+            "token_key",
+            "token_secret",
+            "consumer_secret",
+        )
+        self.assertEqual("url", return_value)
 
 
 class TestReadFileOrUrl(CiTestCase):
@@ -59,45 +68,45 @@ class TestReadFileOrUrl(CiTestCase):
         """Test that str(result.contents) on file is text version of contents.
         It should not be "b'data'", but just "'data'" """
         tmpf = self.tmp_path("myfile1")
-        data = b'This is my file content\n'
+        data = b"This is my file content\n"
         util.write_file(tmpf, data, omode="wb")
         result = read_file_or_url("file://%s" % tmpf)
         self.assertEqual(result.contents, data)
-        self.assertEqual(str(result), data.decode('utf-8'))
+        self.assertEqual(str(result), data.decode("utf-8"))
 
     @httpretty.activate
     def test_read_file_or_url_str_from_url(self):
         """Test that str(result.contents) on url is text version of contents.
         It should not be "b'data'", but just "'data'" """
-        url = 'http://hostname/path'
-        data = b'This is my url content\n'
+        url = "http://hostname/path"
+        data = b"This is my url content\n"
         httpretty.register_uri(httpretty.GET, url, data)
         result = read_file_or_url(url)
         self.assertEqual(result.contents, data)
-        self.assertEqual(str(result), data.decode('utf-8'))
+        self.assertEqual(str(result), data.decode("utf-8"))
 
     @httpretty.activate
     def test_read_file_or_url_str_from_url_redacting_headers_from_logs(self):
         """Headers are redacted from logs but unredacted in requests."""
-        url = 'http://hostname/path'
-        headers = {'sensitive': 'sekret', 'server': 'blah'}
+        url = "http://hostname/path"
+        headers = {"sensitive": "sekret", "server": "blah"}
         httpretty.register_uri(httpretty.GET, url)
         # By default, httpretty will log our request along with the header,
         # so if we don't change this the secret will show up in the logs
-        logging.getLogger('httpretty.core').setLevel(logging.CRITICAL)
+        logging.getLogger("httpretty.core").setLevel(logging.CRITICAL)
 
-        read_file_or_url(url, headers=headers, headers_redact=['sensitive'])
+        read_file_or_url(url, headers=headers, headers_redact=["sensitive"])
         logs = self.logs.getvalue()
         for k in headers.keys():
             self.assertEqual(headers[k], httpretty.last_request().headers[k])
         self.assertIn(REDACTED, logs)
-        self.assertNotIn('sekret', logs)
+        self.assertNotIn("sekret", logs)
 
     @httpretty.activate
     def test_read_file_or_url_str_from_url_redacts_noheaders(self):
         """When no headers_redact, header values are in logs and requests."""
-        url = 'http://hostname/path'
-        headers = {'sensitive': 'sekret', 'server': 'blah'}
+        url = "http://hostname/path"
+        headers = {"sensitive": "sekret", "server": "blah"}
         httpretty.register_uri(httpretty.GET, url)
 
         read_file_or_url(url, headers=headers)
@@ -105,21 +114,27 @@ class TestReadFileOrUrl(CiTestCase):
             self.assertEqual(headers[k], httpretty.last_request().headers[k])
         logs = self.logs.getvalue()
         self.assertNotIn(REDACTED, logs)
-        self.assertIn('sekret', logs)
+        self.assertIn("sekret", logs)
 
-    @mock.patch(M_PATH + 'readurl')
+    @mock.patch(M_PATH + "readurl")
     def test_read_file_or_url_passes_params_to_readurl(self, m_readurl):
         """read_file_or_url passes all params through to readurl."""
-        url = 'http://hostname/path'
-        response = 'This is my url content\n'
+        url = "http://hostname/path"
+        response = "This is my url content\n"
         m_readurl.return_value = response
-        params = {'url': url, 'timeout': 1, 'retries': 2,
-                  'headers': {'somehdr': 'val'},
-                  'data': 'data', 'sec_between': 1,
-                  'ssl_details': {'cert_file': '/path/cert.pem'},
-                  'headers_cb': 'headers_cb', 'exception_cb': 'exception_cb'}
+        params = {
+            "url": url,
+            "timeout": 1,
+            "retries": 2,
+            "headers": {"somehdr": "val"},
+            "data": "data",
+            "sec_between": 1,
+            "ssl_details": {"cert_file": "/path/cert.pem"},
+            "headers_cb": "headers_cb",
+            "exception_cb": "exception_cb",
+        }
         self.assertEqual(response, read_file_or_url(**params))
-        params.pop('url')  # url is passed in as a positional arg
+        params.pop("url")  # url is passed in as a positional arg
         self.assertEqual([mock.call(url, **params)], m_readurl.call_args_list)
 
     def test_wb_read_url_defaults_honored_by_read_file_or_url_callers(self):
@@ -129,7 +144,7 @@ class TestReadFileOrUrl(CiTestCase):
             retries: 0, additional headers None beyond default, method: GET,
             data: None, check_status: True and allow_redirects: True
         """
-        url = 'http://hostname/path'
+        url = "http://hostname/path"
 
         m_response = mock.MagicMock()
 
@@ -137,20 +152,26 @@ class TestReadFileOrUrl(CiTestCase):
             @classmethod
             def request(cls, **kwargs):
                 self.assertEqual(
-                    {'url': url, 'allow_redirects': True, 'method': 'GET',
-                     'headers': {
-                         'User-Agent': 'Cloud-Init/%s' % (
-                             version.version_string())}},
-                    kwargs)
+                    {
+                        "url": url,
+                        "allow_redirects": True,
+                        "method": "GET",
+                        "headers": {
+                            "User-Agent": "Cloud-Init/%s"
+                            % (version.version_string())
+                        },
+                    },
+                    kwargs,
+                )
                 return m_response
 
-        with mock.patch(M_PATH + 'requests.Session') as m_session:
-            error = requests.exceptions.HTTPError('broke')
+        with mock.patch(M_PATH + "requests.Session") as m_session:
+            error = requests.exceptions.HTTPError("broke")
             m_session.side_effect = [error, FakeSession()]
             # assert no retries and check_status == True
             with self.assertRaises(UrlError) as context_manager:
                 response = read_file_or_url(url)
-            self.assertEqual('broke', str(context_manager.exception))
+            self.assertEqual("broke", str(context_manager.exception))
             # assert default headers, method, url and allow_redirects True
             # Success on 2nd call with FakeSession
             response = read_file_or_url(url)
@@ -158,21 +179,22 @@ class TestReadFileOrUrl(CiTestCase):
 
 
 class TestRetryOnUrlExc(CiTestCase):
-
     def test_do_not_retry_non_urlerror(self):
         """When exception is not UrlError return False."""
-        myerror = IOError('something unexcpected')
-        self.assertFalse(retry_on_url_exc(msg='', exc=myerror))
+        myerror = IOError("something unexcpected")
+        self.assertFalse(retry_on_url_exc(msg="", exc=myerror))
 
     def test_perform_retries_on_not_found(self):
         """When exception is UrlError with a 404 status code return True."""
-        myerror = UrlError(cause=RuntimeError(
-            'something was not found'), code=NOT_FOUND)
-        self.assertTrue(retry_on_url_exc(msg='', exc=myerror))
+        myerror = UrlError(
+            cause=RuntimeError("something was not found"), code=NOT_FOUND
+        )
+        self.assertTrue(retry_on_url_exc(msg="", exc=myerror))
 
     def test_perform_retries_on_timeout(self):
         """When exception is a requests.Timout return True."""
-        myerror = UrlError(cause=requests.Timeout('something timed out'))
-        self.assertTrue(retry_on_url_exc(msg='', exc=myerror))
+        myerror = UrlError(cause=requests.Timeout("something timed out"))
+        self.assertTrue(retry_on_url_exc(msg="", exc=myerror))
+
 
 # vi: ts=4 expandtab
diff --git a/tests/unittests/test_util.py b/tests/unittests/test_util.py
index 61b9e303..e2bfe9d2 100644
--- a/tests/unittests/test_util.py
+++ b/tests/unittests/test_util.py
@@ -3,33 +3,30 @@
 """Tests for cloudinit.util"""
 
 import base64
-import logging
-import json
-import platform
-import pytest
-
 import io
+import json
+import logging
 import os
+import platform
 import re
 import shutil
 import stat
 import tempfile
-import yaml
+from textwrap import dedent
 from unittest import mock
 
-from cloudinit import subp
-from cloudinit import importer, util
-from tests.unittests import helpers
-
+import pytest
+import yaml
 
+from cloudinit import importer, subp, util
+from tests.unittests import helpers
 from tests.unittests.helpers import CiTestCase
-from textwrap import dedent
 
 LOG = logging.getLogger(__name__)
 
 MOUNT_INFO = [
-    '68 0 8:3 / / ro,relatime shared:1 - btrfs /dev/sda1 ro,attr2,inode64',
-    '153 68 254:0 / /home rw,relatime shared:101 - xfs /dev/sda2 rw,attr2',
+    "68 0 8:3 / / ro,relatime shared:1 - btrfs /dev/sda1 ro,attr2,inode64",
+    "153 68 254:0 / /home rw,relatime shared:101 - xfs /dev/sda2 rw,attr2",
 ]
 
 OS_RELEASE_SLES = dedent(
@@ -329,9 +326,9 @@ class FakeCloud(object):
     def get_hostname(self, fqdn=None, metadata_only=None):
         myargs = {}
         if fqdn is not None:
-            myargs['fqdn'] = fqdn
+            myargs["fqdn"] = fqdn
         if metadata_only is not None:
-            myargs['metadata_only'] = metadata_only
+            myargs["metadata_only"] = metadata_only
         self.calls.append(myargs)
         if fqdn:
             return self.fqdn
@@ -340,34 +337,34 @@ class FakeCloud(object):
 
 class TestUtil(CiTestCase):
     def test_parse_mount_info_no_opts_no_arg(self):
-        result = util.parse_mount_info('/home', MOUNT_INFO, LOG)
-        self.assertEqual(('/dev/sda2', 'xfs', '/home'), result)
+        result = util.parse_mount_info("/home", MOUNT_INFO, LOG)
+        self.assertEqual(("/dev/sda2", "xfs", "/home"), result)
 
     def test_parse_mount_info_no_opts_arg(self):
-        result = util.parse_mount_info('/home', MOUNT_INFO, LOG, False)
-        self.assertEqual(('/dev/sda2', 'xfs', '/home'), result)
+        result = util.parse_mount_info("/home", MOUNT_INFO, LOG, False)
+        self.assertEqual(("/dev/sda2", "xfs", "/home"), result)
 
     def test_parse_mount_info_with_opts(self):
-        result = util.parse_mount_info('/', MOUNT_INFO, LOG, True)
-        self.assertEqual(('/dev/sda1', 'btrfs', '/', 'ro,relatime'), result)
+        result = util.parse_mount_info("/", MOUNT_INFO, LOG, True)
+        self.assertEqual(("/dev/sda1", "btrfs", "/", "ro,relatime"), result)
 
-    @mock.patch('cloudinit.util.get_mount_info')
+    @mock.patch("cloudinit.util.get_mount_info")
     def test_mount_is_rw(self, m_mount_info):
-        m_mount_info.return_value = ('/dev/sda1', 'btrfs', '/', 'rw,relatime')
-        is_rw = util.mount_is_read_write('/')
+        m_mount_info.return_value = ("/dev/sda1", "btrfs", "/", "rw,relatime")
+        is_rw = util.mount_is_read_write("/")
         self.assertEqual(is_rw, True)
 
-    @mock.patch('cloudinit.util.get_mount_info')
+    @mock.patch("cloudinit.util.get_mount_info")
     def test_mount_is_ro(self, m_mount_info):
-        m_mount_info.return_value = ('/dev/sda1', 'btrfs', '/', 'ro,relatime')
-        is_rw = util.mount_is_read_write('/')
+        m_mount_info.return_value = ("/dev/sda1", "btrfs", "/", "ro,relatime")
+        is_rw = util.mount_is_read_write("/")
         self.assertEqual(is_rw, False)
 
 
 class TestUptime(CiTestCase):
-    @mock.patch('cloudinit.util.boottime')
-    @mock.patch('cloudinit.util.os.path.exists')
-    @mock.patch('cloudinit.util.time.time')
+    @mock.patch("cloudinit.util.boottime")
+    @mock.patch("cloudinit.util.os.path.exists")
+    @mock.patch("cloudinit.util.time.time")
     def test_uptime_non_linux_path(self, m_time, m_exists, m_boottime):
         boottime = 1000.0
         uptime = 10.0
@@ -382,24 +379,24 @@ class TestShellify(CiTestCase):
     def test_input_dict_raises_type_error(self):
         self.assertRaisesRegex(
             TypeError,
-            'Input.*was.*dict.*xpected',
+            "Input.*was.*dict.*xpected",
             util.shellify,
-            {'mykey': 'myval'},
+            {"mykey": "myval"},
         )
 
     def test_input_str_raises_type_error(self):
         self.assertRaisesRegex(
-            TypeError, 'Input.*was.*str.*xpected', util.shellify, "foobar"
+            TypeError, "Input.*was.*str.*xpected", util.shellify, "foobar"
         )
 
     def test_value_with_int_raises_type_error(self):
         self.assertRaisesRegex(
-            TypeError, 'shellify.*int', util.shellify, ["foo", 1]
+            TypeError, "shellify.*int", util.shellify, ["foo", 1]
         )
 
     def test_supports_strings_and_lists(self):
         self.assertEqual(
-            '\n'.join(
+            "\n".join(
                 [
                     "#!/bin/sh",
                     "echo hi mom",
@@ -409,13 +406,13 @@ class TestShellify(CiTestCase):
                 ]
             ),
             util.shellify(
-                ["echo hi mom", ["echo", "hi dad"], ('echo', 'hi', 'sis')]
+                ["echo hi mom", ["echo", "hi dad"], ("echo", "hi", "sis")]
             ),
         )
 
     def test_supports_comments(self):
         self.assertEqual(
-            '\n'.join(["#!/bin/sh", "echo start", "echo end", ""]),
+            "\n".join(["#!/bin/sh", "echo start", "echo end", ""]),
             util.shellify(["echo start", None, "echo end"]),
         )
 
@@ -424,58 +421,58 @@ class TestGetHostnameFqdn(CiTestCase):
     def test_get_hostname_fqdn_from_only_cfg_fqdn(self):
         """When cfg only has the fqdn key, derive hostname and fqdn from it."""
         hostname, fqdn = util.get_hostname_fqdn(
-            cfg={'fqdn': 'myhost.domain.com'}, cloud=None
+            cfg={"fqdn": "myhost.domain.com"}, cloud=None
         )
-        self.assertEqual('myhost', hostname)
-        self.assertEqual('myhost.domain.com', fqdn)
+        self.assertEqual("myhost", hostname)
+        self.assertEqual("myhost.domain.com", fqdn)
 
     def test_get_hostname_fqdn_from_cfg_fqdn_and_hostname(self):
         """When cfg has both fqdn and hostname keys, return them."""
         hostname, fqdn = util.get_hostname_fqdn(
-            cfg={'fqdn': 'myhost.domain.com', 'hostname': 'other'}, cloud=None
+            cfg={"fqdn": "myhost.domain.com", "hostname": "other"}, cloud=None
         )
-        self.assertEqual('other', hostname)
-        self.assertEqual('myhost.domain.com', fqdn)
+        self.assertEqual("other", hostname)
+        self.assertEqual("myhost.domain.com", fqdn)
 
     def test_get_hostname_fqdn_from_cfg_hostname_with_domain(self):
         """When cfg has only hostname key which represents a fqdn, use that."""
         hostname, fqdn = util.get_hostname_fqdn(
-            cfg={'hostname': 'myhost.domain.com'}, cloud=None
+            cfg={"hostname": "myhost.domain.com"}, cloud=None
         )
-        self.assertEqual('myhost', hostname)
-        self.assertEqual('myhost.domain.com', fqdn)
+        self.assertEqual("myhost", hostname)
+        self.assertEqual("myhost.domain.com", fqdn)
 
     def test_get_hostname_fqdn_from_cfg_hostname_without_domain(self):
         """When cfg has a hostname without a '.' query cloud.get_hostname."""
-        mycloud = FakeCloud('cloudhost', 'cloudhost.mycloud.com')
+        mycloud = FakeCloud("cloudhost", "cloudhost.mycloud.com")
         hostname, fqdn = util.get_hostname_fqdn(
-            cfg={'hostname': 'myhost'}, cloud=mycloud
+            cfg={"hostname": "myhost"}, cloud=mycloud
         )
-        self.assertEqual('myhost', hostname)
-        self.assertEqual('cloudhost.mycloud.com', fqdn)
+        self.assertEqual("myhost", hostname)
+        self.assertEqual("cloudhost.mycloud.com", fqdn)
         self.assertEqual(
-            [{'fqdn': True, 'metadata_only': False}], mycloud.calls
+            [{"fqdn": True, "metadata_only": False}], mycloud.calls
         )
 
     def test_get_hostname_fqdn_from_without_fqdn_or_hostname(self):
         """When cfg has neither hostname nor fqdn cloud.get_hostname."""
-        mycloud = FakeCloud('cloudhost', 'cloudhost.mycloud.com')
+        mycloud = FakeCloud("cloudhost", "cloudhost.mycloud.com")
         hostname, fqdn = util.get_hostname_fqdn(cfg={}, cloud=mycloud)
-        self.assertEqual('cloudhost', hostname)
-        self.assertEqual('cloudhost.mycloud.com', fqdn)
+        self.assertEqual("cloudhost", hostname)
+        self.assertEqual("cloudhost.mycloud.com", fqdn)
         self.assertEqual(
-            [{'fqdn': True, 'metadata_only': False}, {'metadata_only': False}],
+            [{"fqdn": True, "metadata_only": False}, {"metadata_only": False}],
             mycloud.calls,
         )
 
     def test_get_hostname_fqdn_from_passes_metadata_only_to_cloud(self):
         """Calls to cloud.get_hostname pass the metadata_only parameter."""
-        mycloud = FakeCloud('cloudhost', 'cloudhost.mycloud.com')
+        mycloud = FakeCloud("cloudhost", "cloudhost.mycloud.com")
         _hn, _fqdn = util.get_hostname_fqdn(
             cfg={}, cloud=mycloud, metadata_only=True
         )
         self.assertEqual(
-            [{'fqdn': True, 'metadata_only': True}, {'metadata_only': True}],
+            [{"fqdn": True, "metadata_only": True}, {"metadata_only": True}],
             mycloud.calls,
         )
 
@@ -565,19 +562,19 @@ class TestBlkid(CiTestCase):
         )
 
 
-@mock.patch('cloudinit.subp.subp')
+@mock.patch("cloudinit.subp.subp")
 class TestUdevadmSettle(CiTestCase):
     def test_with_no_params(self, m_subp):
         """called with no parameters."""
         util.udevadm_settle()
-        m_subp.called_once_with(mock.call(['udevadm', 'settle']))
+        m_subp.called_once_with(mock.call(["udevadm", "settle"]))
 
     def test_with_exists_and_not_exists(self, m_subp):
         """with exists=file where file does not exist should invoke subp."""
         mydev = self.tmp_path("mydev")
         util.udevadm_settle(exists=mydev)
         m_subp.called_once_with(
-            ['udevadm', 'settle', '--exit-if-exists=%s' % mydev]
+            ["udevadm", "settle", "--exit-if-exists=%s" % mydev]
         )
 
     def test_with_exists_and_file_exists(self, m_subp):
@@ -592,7 +589,7 @@ class TestUdevadmSettle(CiTestCase):
         timeout = 9
         util.udevadm_settle(timeout=timeout)
         m_subp.called_once_with(
-            ['udevadm', 'settle', '--timeout=%s' % timeout]
+            ["udevadm", "settle", "--timeout=%s" % timeout]
         )
 
     def test_with_timeout_string(self, m_subp):
@@ -600,7 +597,7 @@ class TestUdevadmSettle(CiTestCase):
         timeout = "555"
         util.udevadm_settle(timeout=timeout)
         m_subp.assert_called_once_with(
-            ['udevadm', 'settle', '--timeout=%s' % timeout]
+            ["udevadm", "settle", "--timeout=%s" % timeout]
         )
 
     def test_with_exists_and_timeout(self, m_subp):
@@ -610,10 +607,10 @@ class TestUdevadmSettle(CiTestCase):
         util.udevadm_settle(exists=mydev)
         m_subp.called_once_with(
             [
-                'udevadm',
-                'settle',
-                '--exit-if-exists=%s' % mydev,
-                '--timeout=%s' % timeout,
+                "udevadm",
+                "settle",
+                "--exit-if-exists=%s" % mydev,
+                "--timeout=%s" % timeout,
             ]
         )
 
@@ -622,7 +619,7 @@ class TestUdevadmSettle(CiTestCase):
         self.assertRaises(subp.ProcessExecutionError, util.udevadm_settle)
 
 
-@mock.patch('os.path.exists')
+@mock.patch("os.path.exists")
 class TestGetLinuxDistro(CiTestCase):
     def setUp(self):
         # python2 has no lru_cache, and therefore, no cache_clear()
@@ -632,36 +629,36 @@ class TestGetLinuxDistro(CiTestCase):
     @classmethod
     def os_release_exists(self, path):
         """Side effect function"""
-        if path == '/etc/os-release':
+        if path == "/etc/os-release":
             return 1
 
     @classmethod
     def redhat_release_exists(self, path):
         """Side effect function"""
-        if path == '/etc/redhat-release':
+        if path == "/etc/redhat-release":
             return 1
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_distro_quoted_name(self, m_os_release, m_path_exists):
         """Verify we get the correct name if the os-release file has
         the distro name in quotes"""
         m_os_release.return_value = OS_RELEASE_SLES
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('sles', '12.3', platform.machine()), dist)
+        self.assertEqual(("sles", "12.3", platform.machine()), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_distro_bare_name(self, m_os_release, m_path_exists):
         """Verify we get the correct name if the os-release file does not
         have the distro name in quotes"""
         m_os_release.return_value = OS_RELEASE_UBUNTU
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('ubuntu', '16.04', 'xenial'), dist)
+        self.assertEqual(("ubuntu", "16.04", "xenial"), dist)
 
-    @mock.patch('platform.system')
-    @mock.patch('platform.release')
-    @mock.patch('cloudinit.util._parse_redhat_release')
+    @mock.patch("platform.system")
+    @mock.patch("platform.release")
+    @mock.patch("cloudinit.util._parse_redhat_release")
     def test_get_linux_freebsd(
         self,
         m_parse_redhat_release,
@@ -671,192 +668,194 @@ class TestGetLinuxDistro(CiTestCase):
     ):
         """Verify we get the correct name and release name on FreeBSD."""
         m_path_exists.return_value = False
-        m_platform_release.return_value = '12.0-RELEASE-p10'
-        m_platform_system.return_value = 'FreeBSD'
+        m_platform_release.return_value = "12.0-RELEASE-p10"
+        m_platform_system.return_value = "FreeBSD"
         m_parse_redhat_release.return_value = {}
         util.is_BSD.cache_clear()
         dist = util.get_linux_distro()
-        self.assertEqual(('freebsd', '12.0-RELEASE-p10', ''), dist)
+        self.assertEqual(("freebsd", "12.0-RELEASE-p10", ""), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_centos6(self, m_os_release, m_path_exists):
         """Verify we get the correct name and release name on CentOS 6."""
         m_os_release.return_value = REDHAT_RELEASE_CENTOS_6
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('centos', '6.10', 'Final'), dist)
+        self.assertEqual(("centos", "6.10", "Final"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_centos7_redhat_release(self, m_os_release, m_exists):
         """Verify the correct release info on CentOS 7 without os-release."""
         m_os_release.return_value = REDHAT_RELEASE_CENTOS_7
         m_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('centos', '7.5.1804', 'Core'), dist)
+        self.assertEqual(("centos", "7.5.1804", "Core"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_redhat7_osrelease(self, m_os_release, m_path_exists):
         """Verify redhat 7 read from os-release."""
         m_os_release.return_value = OS_RELEASE_REDHAT_7
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('redhat', '7.5', 'Maipo'), dist)
+        self.assertEqual(("redhat", "7.5", "Maipo"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_redhat7_rhrelease(self, m_os_release, m_path_exists):
         """Verify redhat 7 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_REDHAT_7
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('redhat', '7.5', 'Maipo'), dist)
+        self.assertEqual(("redhat", "7.5", "Maipo"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_redhat6_rhrelease(self, m_os_release, m_path_exists):
         """Verify redhat 6 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_REDHAT_6
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('redhat', '6.10', 'Santiago'), dist)
+        self.assertEqual(("redhat", "6.10", "Santiago"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_copr_centos(self, m_os_release, m_path_exists):
         """Verify we get the correct name and release name on COPR CentOS."""
         m_os_release.return_value = OS_RELEASE_CENTOS
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('centos', '7', 'Core'), dist)
+        self.assertEqual(("centos", "7", "Core"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_almalinux8_rhrelease(self, m_os_release, m_path_exists):
         """Verify almalinux 8 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_ALMALINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('almalinux', '8.3', 'Purple Manul'), dist)
+        self.assertEqual(("almalinux", "8.3", "Purple Manul"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_almalinux8_osrelease(self, m_os_release, m_path_exists):
         """Verify almalinux 8 read from os-release."""
         m_os_release.return_value = OS_RELEASE_ALMALINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('almalinux', '8.3', 'Purple Manul'), dist)
+        self.assertEqual(("almalinux", "8.3", "Purple Manul"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_eurolinux7_rhrelease(self, m_os_release, m_path_exists):
         """Verify eurolinux 7 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_EUROLINUX_7
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('eurolinux', '7.9', 'Minsk'), dist)
+        self.assertEqual(("eurolinux", "7.9", "Minsk"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_eurolinux7_osrelease(self, m_os_release, m_path_exists):
         """Verify eurolinux 7 read from os-release."""
         m_os_release.return_value = OS_RELEASE_EUROLINUX_7
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('eurolinux', '7.9', 'Minsk'), dist)
+        self.assertEqual(("eurolinux", "7.9", "Minsk"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_eurolinux8_rhrelease(self, m_os_release, m_path_exists):
         """Verify eurolinux 8 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_EUROLINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('eurolinux', '8.4', 'Vaduz'), dist)
+        self.assertEqual(("eurolinux", "8.4", "Vaduz"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_eurolinux8_osrelease(self, m_os_release, m_path_exists):
         """Verify eurolinux 8 read from os-release."""
         m_os_release.return_value = OS_RELEASE_EUROLINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('eurolinux', '8.4', 'Vaduz'), dist)
+        self.assertEqual(("eurolinux", "8.4", "Vaduz"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
-    def test_get_linux_miraclelinux8_rhrelease(self, m_os_release,
-                                               m_path_exists):
+    @mock.patch("cloudinit.util.load_file")
+    def test_get_linux_miraclelinux8_rhrelease(
+        self, m_os_release, m_path_exists
+    ):
         """Verify miraclelinux 8 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_MIRACLELINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('miracle', '8.4', 'Peony'), dist)
+        self.assertEqual(("miracle", "8.4", "Peony"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
-    def test_get_linux_miraclelinux8_osrelease(self, m_os_release,
-                                               m_path_exists):
+    @mock.patch("cloudinit.util.load_file")
+    def test_get_linux_miraclelinux8_osrelease(
+        self, m_os_release, m_path_exists
+    ):
         """Verify miraclelinux 8 read from os-release."""
         m_os_release.return_value = OS_RELEASE_MIRACLELINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('miraclelinux', '8', 'Peony'), dist)
+        self.assertEqual(("miraclelinux", "8", "Peony"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_rocky8_rhrelease(self, m_os_release, m_path_exists):
         """Verify rocky linux 8 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_ROCKY_8
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('rocky', '8.3', 'Green Obsidian'), dist)
+        self.assertEqual(("rocky", "8.3", "Green Obsidian"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_rocky8_osrelease(self, m_os_release, m_path_exists):
         """Verify rocky linux 8 read from os-release."""
         m_os_release.return_value = OS_RELEASE_ROCKY_8
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('rocky', '8.3', 'Green Obsidian'), dist)
+        self.assertEqual(("rocky", "8.3", "Green Obsidian"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_virtuozzo8_rhrelease(self, m_os_release, m_path_exists):
         """Verify virtuozzo linux 8 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_VIRTUOZZO_8
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('virtuozzo', '8', 'Virtuozzo Linux'), dist)
+        self.assertEqual(("virtuozzo", "8", "Virtuozzo Linux"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_virtuozzo8_osrelease(self, m_os_release, m_path_exists):
         """Verify virtuozzo linux 8 read from os-release."""
         m_os_release.return_value = OS_RELEASE_VIRTUOZZO_8
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('virtuozzo', '8', 'Virtuozzo Linux'), dist)
+        self.assertEqual(("virtuozzo", "8", "Virtuozzo Linux"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_cloud8_rhrelease(self, m_os_release, m_path_exists):
         """Verify cloudlinux 8 read from redhat-release."""
         m_os_release.return_value = REDHAT_RELEASE_CLOUDLINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.redhat_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('cloudlinux', '8.4', 'Valery Rozhdestvensky'), dist)
+        self.assertEqual(("cloudlinux", "8.4", "Valery Rozhdestvensky"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_cloud8_osrelease(self, m_os_release, m_path_exists):
         """Verify cloudlinux 8 read from os-release."""
         m_os_release.return_value = OS_RELEASE_CLOUDLINUX_8
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('cloudlinux', '8.4', 'Valery Rozhdestvensky'), dist)
+        self.assertEqual(("cloudlinux", "8.4", "Valery Rozhdestvensky"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_debian(self, m_os_release, m_path_exists):
         """Verify we get the correct name and release name on Debian."""
         m_os_release.return_value = OS_RELEASE_DEBIAN
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('debian', '9', 'stretch'), dist)
+        self.assertEqual(("debian", "9", "stretch"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_openeuler(self, m_os_release, m_path_exists):
         """Verify get the correct name and release name on Openeuler."""
         m_os_release.return_value = OS_RELEASE_OPENEULER_20
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('openEuler', '20.03', 'LTS-SP2'), dist)
+        self.assertEqual(("openEuler", "20.03", "LTS-SP2"), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_opensuse(self, m_os_release, m_path_exists):
         """Verify we get the correct name and machine arch on openSUSE
         prior to openSUSE Leap 15.
@@ -864,9 +863,9 @@ class TestGetLinuxDistro(CiTestCase):
         m_os_release.return_value = OS_RELEASE_OPENSUSE
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('opensuse', '42.3', platform.machine()), dist)
+        self.assertEqual(("opensuse", "42.3", platform.machine()), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_opensuse_l15(self, m_os_release, m_path_exists):
         """Verify we get the correct name and machine arch on openSUSE
         for openSUSE Leap 15.0 and later.
@@ -874,9 +873,9 @@ class TestGetLinuxDistro(CiTestCase):
         m_os_release.return_value = OS_RELEASE_OPENSUSE_L15
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('opensuse-leap', '15.0', platform.machine()), dist)
+        self.assertEqual(("opensuse-leap", "15.0", platform.machine()), dist)
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_opensuse_tw(self, m_os_release, m_path_exists):
         """Verify we get the correct name and machine arch on openSUSE
         for openSUSE Tumbleweed
@@ -885,31 +884,31 @@ class TestGetLinuxDistro(CiTestCase):
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
         self.assertEqual(
-            ('opensuse-tumbleweed', '20180920', platform.machine()), dist
+            ("opensuse-tumbleweed", "20180920", platform.machine()), dist
         )
 
-    @mock.patch('cloudinit.util.load_file')
+    @mock.patch("cloudinit.util.load_file")
     def test_get_linux_photon_os_release(self, m_os_release, m_path_exists):
         """Verify we get the correct name and machine arch on PhotonOS"""
         m_os_release.return_value = OS_RELEASE_PHOTON
         m_path_exists.side_effect = TestGetLinuxDistro.os_release_exists
         dist = util.get_linux_distro()
-        self.assertEqual(('photon', '4.0', 'VMware Photon OS/Linux'), dist)
+        self.assertEqual(("photon", "4.0", "VMware Photon OS/Linux"), dist)
 
-    @mock.patch('platform.system')
-    @mock.patch('platform.dist', create=True)
+    @mock.patch("platform.system")
+    @mock.patch("platform.dist", create=True)
     def test_get_linux_distro_no_data(
         self, m_platform_dist, m_platform_system, m_path_exists
     ):
         """Verify we get no information if os-release does not exist"""
-        m_platform_dist.return_value = ('', '', '')
+        m_platform_dist.return_value = ("", "", "")
         m_platform_system.return_value = "Linux"
         m_path_exists.return_value = 0
         dist = util.get_linux_distro()
-        self.assertEqual(('', '', ''), dist)
+        self.assertEqual(("", "", ""), dist)
 
-    @mock.patch('platform.system')
-    @mock.patch('platform.dist', create=True)
+    @mock.patch("platform.system")
+    @mock.patch("platform.dist", create=True)
     def test_get_linux_distro_no_impl(
         self, m_platform_dist, m_platform_system, m_path_exists
     ):
@@ -919,55 +918,55 @@ class TestGetLinuxDistro(CiTestCase):
         m_platform_system.return_value = "Linux"
         m_path_exists.return_value = 0
         dist = util.get_linux_distro()
-        self.assertEqual(('', '', ''), dist)
+        self.assertEqual(("", "", ""), dist)
 
-    @mock.patch('platform.system')
-    @mock.patch('platform.dist', create=True)
+    @mock.patch("platform.system")
+    @mock.patch("platform.dist", create=True)
     def test_get_linux_distro_plat_data(
         self, m_platform_dist, m_platform_system, m_path_exists
     ):
         """Verify we get the correct platform information"""
-        m_platform_dist.return_value = ('foo', '1.1', 'aarch64')
+        m_platform_dist.return_value = ("foo", "1.1", "aarch64")
         m_platform_system.return_value = "Linux"
         m_path_exists.return_value = 0
         dist = util.get_linux_distro()
-        self.assertEqual(('foo', '1.1', 'aarch64'), dist)
+        self.assertEqual(("foo", "1.1", "aarch64"), dist)
 
 
 class TestGetVariant:
     @pytest.mark.parametrize(
-        'info, expected_variant',
+        "info, expected_variant",
         [
-            ({'system': 'Linux', 'dist': ('almalinux',)}, 'almalinux'),
-            ({'system': 'linux', 'dist': ('alpine',)}, 'alpine'),
-            ({'system': 'linux', 'dist': ('arch',)}, 'arch'),
-            ({'system': 'linux', 'dist': ('centos',)}, 'centos'),
-            ({'system': 'linux', 'dist': ('cloudlinux',)}, 'cloudlinux'),
-            ({'system': 'linux', 'dist': ('debian',)}, 'debian'),
-            ({'system': 'linux', 'dist': ('eurolinux',)}, 'eurolinux'),
-            ({'system': 'linux', 'dist': ('fedora',)}, 'fedora'),
-            ({'system': 'linux', 'dist': ('openEuler',)}, 'openeuler'),
-            ({'system': 'linux', 'dist': ('photon',)}, 'photon'),
-            ({'system': 'linux', 'dist': ('rhel',)}, 'rhel'),
-            ({'system': 'linux', 'dist': ('rocky',)}, 'rocky'),
-            ({'system': 'linux', 'dist': ('suse',)}, 'suse'),
-            ({'system': 'linux', 'dist': ('virtuozzo',)}, 'virtuozzo'),
-            ({'system': 'linux', 'dist': ('ubuntu',)}, 'ubuntu'),
-            ({'system': 'linux', 'dist': ('linuxmint',)}, 'ubuntu'),
-            ({'system': 'linux', 'dist': ('mint',)}, 'ubuntu'),
-            ({'system': 'linux', 'dist': ('redhat',)}, 'rhel'),
-            ({'system': 'linux', 'dist': ('opensuse',)}, 'suse'),
-            ({'system': 'linux', 'dist': ('opensuse-tumbleweed',)}, 'suse'),
-            ({'system': 'linux', 'dist': ('opensuse-leap',)}, 'suse'),
-            ({'system': 'linux', 'dist': ('sles',)}, 'suse'),
-            ({'system': 'linux', 'dist': ('sle_hpc',)}, 'suse'),
-            ({'system': 'linux', 'dist': ('my_distro',)}, 'linux'),
-            ({'system': 'Windows', 'dist': ('dontcare',)}, 'windows'),
-            ({'system': 'Darwin', 'dist': ('dontcare',)}, 'darwin'),
-            ({'system': 'Freebsd', 'dist': ('dontcare',)}, 'freebsd'),
-            ({'system': 'Netbsd', 'dist': ('dontcare',)}, 'netbsd'),
-            ({'system': 'Openbsd', 'dist': ('dontcare',)}, 'openbsd'),
-            ({'system': 'Dragonfly', 'dist': ('dontcare',)}, 'dragonfly'),
+            ({"system": "Linux", "dist": ("almalinux",)}, "almalinux"),
+            ({"system": "linux", "dist": ("alpine",)}, "alpine"),
+            ({"system": "linux", "dist": ("arch",)}, "arch"),
+            ({"system": "linux", "dist": ("centos",)}, "centos"),
+            ({"system": "linux", "dist": ("cloudlinux",)}, "cloudlinux"),
+            ({"system": "linux", "dist": ("debian",)}, "debian"),
+            ({"system": "linux", "dist": ("eurolinux",)}, "eurolinux"),
+            ({"system": "linux", "dist": ("fedora",)}, "fedora"),
+            ({"system": "linux", "dist": ("openEuler",)}, "openeuler"),
+            ({"system": "linux", "dist": ("photon",)}, "photon"),
+            ({"system": "linux", "dist": ("rhel",)}, "rhel"),
+            ({"system": "linux", "dist": ("rocky",)}, "rocky"),
+            ({"system": "linux", "dist": ("suse",)}, "suse"),
+            ({"system": "linux", "dist": ("virtuozzo",)}, "virtuozzo"),
+            ({"system": "linux", "dist": ("ubuntu",)}, "ubuntu"),
+            ({"system": "linux", "dist": ("linuxmint",)}, "ubuntu"),
+            ({"system": "linux", "dist": ("mint",)}, "ubuntu"),
+            ({"system": "linux", "dist": ("redhat",)}, "rhel"),
+            ({"system": "linux", "dist": ("opensuse",)}, "suse"),
+            ({"system": "linux", "dist": ("opensuse-tumbleweed",)}, "suse"),
+            ({"system": "linux", "dist": ("opensuse-leap",)}, "suse"),
+            ({"system": "linux", "dist": ("sles",)}, "suse"),
+            ({"system": "linux", "dist": ("sle_hpc",)}, "suse"),
+            ({"system": "linux", "dist": ("my_distro",)}, "linux"),
+            ({"system": "Windows", "dist": ("dontcare",)}, "windows"),
+            ({"system": "Darwin", "dist": ("dontcare",)}, "darwin"),
+            ({"system": "Freebsd", "dist": ("dontcare",)}, "freebsd"),
+            ({"system": "Netbsd", "dist": ("dontcare",)}, "netbsd"),
+            ({"system": "Openbsd", "dist": ("dontcare",)}, "openbsd"),
+            ({"system": "Dragonfly", "dist": ("dontcare",)}, "dragonfly"),
         ],
     )
     def test_get_variant(self, info, expected_variant):
@@ -978,41 +977,42 @@ class TestGetVariant:
 class TestJsonDumps(CiTestCase):
     def test_is_str(self):
         """json_dumps should return a string."""
-        self.assertTrue(isinstance(util.json_dumps({'abc': '123'}), str))
+        self.assertTrue(isinstance(util.json_dumps({"abc": "123"}), str))
 
     def test_utf8(self):
-        smiley = '\\ud83d\\ude03'
+        smiley = "\\ud83d\\ude03"
         self.assertEqual(
-            {'smiley': smiley}, json.loads(util.json_dumps({'smiley': smiley}))
+            {"smiley": smiley}, json.loads(util.json_dumps({"smiley": smiley}))
         )
 
     def test_non_utf8(self):
-        blob = b'\xba\x03Qx-#y\xea'
+        blob = b"\xba\x03Qx-#y\xea"
         self.assertEqual(
-            {'blob': 'ci-b64:' + base64.b64encode(blob).decode('utf-8')},
-            json.loads(util.json_dumps({'blob': blob})),
+            {"blob": "ci-b64:" + base64.b64encode(blob).decode("utf-8")},
+            json.loads(util.json_dumps({"blob": blob})),
         )
 
 
-@mock.patch('os.path.exists')
+@mock.patch("os.path.exists")
 class TestIsLXD(CiTestCase):
     def test_is_lxd_true_on_sock_device(self, m_exists):
         """When lxd's /dev/lxd/sock exists, is_lxd returns true."""
         m_exists.return_value = True
         self.assertTrue(util.is_lxd())
-        m_exists.assert_called_once_with('/dev/lxd/sock')
+        m_exists.assert_called_once_with("/dev/lxd/sock")
 
     def test_is_lxd_false_when_sock_device_absent(self, m_exists):
         """When lxd's /dev/lxd/sock is absent, is_lxd returns false."""
         m_exists.return_value = False
         self.assertFalse(util.is_lxd())
-        m_exists.assert_called_once_with('/dev/lxd/sock')
+        m_exists.assert_called_once_with("/dev/lxd/sock")
 
 
 class TestReadCcFromCmdline:
     if hasattr(pytest, "param"):
         random_string = pytest.param(
-            CiTestCase.random_string(), None, id="random_string")
+            CiTestCase.random_string(), None, id="random_string"
+        )
     else:
         random_string = (CiTestCase.random_string(), None)
 
@@ -1022,55 +1022,51 @@ class TestReadCcFromCmdline:
             # Return None if cmdline has no cc:<YAML>end_cc content.
             random_string,
             # Return None if YAML content is empty string.
-            ('foo cc: end_cc bar', None),
+            ("foo cc: end_cc bar", None),
             # Return expected dictionary without trailing end_cc marker.
-            ('foo cc: ssh_pwauth: true', {'ssh_pwauth': True}),
+            ("foo cc: ssh_pwauth: true", {"ssh_pwauth": True}),
             # Return expected dictionary w escaped newline and no end_cc.
-            ('foo cc: ssh_pwauth: true\\n', {'ssh_pwauth': True}),
+            ("foo cc: ssh_pwauth: true\\n", {"ssh_pwauth": True}),
             # Return expected dictionary of yaml between cc: and end_cc.
-            ('foo cc: ssh_pwauth: true end_cc bar', {'ssh_pwauth': True}),
+            ("foo cc: ssh_pwauth: true end_cc bar", {"ssh_pwauth": True}),
             # Return dict with list value w escaped newline, no end_cc.
             (
-                'cc: ssh_import_id: [smoser, kirkland]\\n',
-                {'ssh_import_id': ['smoser', 'kirkland']},
+                "cc: ssh_import_id: [smoser, kirkland]\\n",
+                {"ssh_import_id": ["smoser", "kirkland"]},
             ),
             # Parse urlencoded brackets in yaml content.
             (
-                'cc: ssh_import_id: %5Bsmoser, kirkland%5D end_cc',
-                {'ssh_import_id': ['smoser', 'kirkland']},
+                "cc: ssh_import_id: %5Bsmoser, kirkland%5D end_cc",
+                {"ssh_import_id": ["smoser", "kirkland"]},
             ),
             # Parse complete urlencoded yaml content.
             (
-                'cc: ssh_import_id%3A%20%5Buser1%2C%20user2%5D end_cc',
-                {'ssh_import_id': ['user1', 'user2']},
+                "cc: ssh_import_id%3A%20%5Buser1%2C%20user2%5D end_cc",
+                {"ssh_import_id": ["user1", "user2"]},
             ),
             # Parse nested dictionary in yaml content.
             (
-                'cc: ntp: {enabled: true, ntp_client: myclient} end_cc',
-                {'ntp': {'enabled': True, 'ntp_client': 'myclient'}},
+                "cc: ntp: {enabled: true, ntp_client: myclient} end_cc",
+                {"ntp": {"enabled": True, "ntp_client": "myclient"}},
             ),
             # Parse single mapping value in yaml content.
-            ('cc: ssh_import_id: smoser end_cc', {'ssh_import_id': 'smoser'}),
+            ("cc: ssh_import_id: smoser end_cc", {"ssh_import_id": "smoser"}),
             # Parse multiline content with multiple mapping and nested lists.
             (
-                (
-                    'cc: ssh_import_id: [smoser, bob]\\n'
-                    'runcmd: [ [ ls, -l ], echo hi ] end_cc'
-                ),
+                "cc: ssh_import_id: [smoser, bob]\\n"
+                "runcmd: [ [ ls, -l ], echo hi ] end_cc",
                 {
-                    'ssh_import_id': ['smoser', 'bob'],
-                    'runcmd': [['ls', '-l'], 'echo hi'],
+                    "ssh_import_id": ["smoser", "bob"],
+                    "runcmd": [["ls", "-l"], "echo hi"],
                 },
             ),
             # Parse multiline encoded content w/ mappings and nested lists.
             (
-                (
-                    'cc: ssh_import_id: %5Bsmoser, bob%5D\\n'
-                    'runcmd: [ [ ls, -l ], echo hi ] end_cc'
-                ),
+                "cc: ssh_import_id: %5Bsmoser, bob%5D\\n"
+                "runcmd: [ [ ls, -l ], echo hi ] end_cc",
                 {
-                    'ssh_import_id': ['smoser', 'bob'],
-                    'runcmd': [['ls', '-l'], 'echo hi'],
+                    "ssh_import_id": ["smoser", "bob"],
+                    "runcmd": [["ls", "-l"], "echo hi"],
                 },
             ),
             # test encoded escaped newlines work.
@@ -1079,17 +1075,13 @@ class TestReadCcFromCmdline:
             # 'ssh_import_id: [smoser, bob]\\nruncmd: [ [ ls, -l ], echo hi ]'
             (
                 (
-                    'cc: '
-                    + (
-                        'ssh_import_id%3A%20%5Bsmoser%2C%20bob%5D%5Cn'
-                        'runcmd%3A%20%5B%20%5B%20ls%2C%20-l%20%5D%2C'
-                        '%20echo%20hi%20%5D'
-                    )
-                    + ' end_cc'
+                    "cc: " + "ssh_import_id%3A%20%5Bsmoser%2C%20bob%5D%5Cn"
+                    "runcmd%3A%20%5B%20%5B%20ls%2C%20-l%20%5D%2C"
+                    "%20echo%20hi%20%5D" + " end_cc"
                 ),
                 {
-                    'ssh_import_id': ['smoser', 'bob'],
-                    'runcmd': [['ls', '-l'], 'echo hi'],
+                    "ssh_import_id": ["smoser", "bob"],
+                    "runcmd": [["ls", "-l"], "echo hi"],
                 },
             ),
             # test encoded newlines work.
@@ -1098,34 +1090,26 @@ class TestReadCcFromCmdline:
             # 'ssh_import_id: [smoser, bob]\nruncmd: [ [ ls, -l ], echo hi ]'
             (
                 (
-                    "cc: "
-                    + (
-                        'ssh_import_id%3A%20%5Bsmoser%2C%20bob%5D%0A'
-                        'runcmd%3A%20%5B%20%5B%20ls%2C%20-l%20%5D%2C'
-                        '%20echo%20hi%20%5D'
-                    )
-                    + ' end_cc'
+                    "cc: " + "ssh_import_id%3A%20%5Bsmoser%2C%20bob%5D%0A"
+                    "runcmd%3A%20%5B%20%5B%20ls%2C%20-l%20%5D%2C"
+                    "%20echo%20hi%20%5D" + " end_cc"
                 ),
                 {
-                    'ssh_import_id': ['smoser', 'bob'],
-                    'runcmd': [['ls', '-l'], 'echo hi'],
+                    "ssh_import_id": ["smoser", "bob"],
+                    "runcmd": [["ls", "-l"], "echo hi"],
                 },
             ),
             # Parse and merge multiple yaml content sections.
             (
-                (
-                    'cc:ssh_import_id: [smoser, bob] end_cc '
-                    'cc: runcmd: [ [ ls, -l ] ] end_cc'
-                ),
-                {'ssh_import_id': ['smoser', 'bob'], 'runcmd': [['ls', '-l']]},
+                "cc:ssh_import_id: [smoser, bob] end_cc "
+                "cc: runcmd: [ [ ls, -l ] ] end_cc",
+                {"ssh_import_id": ["smoser", "bob"], "runcmd": [["ls", "-l"]]},
             ),
             # Parse and merge multiple encoded yaml content sections.
             (
-                (
-                    'cc:ssh_import_id%3A%20%5Bsmoser%5D end_cc '
-                    'cc:runcmd%3A%20%5B%20%5B%20ls%2C%20-l%20%5D%20%5D end_cc'
-                ),
-                {'ssh_import_id': ['smoser'], 'runcmd': [['ls', '-l']]},
+                "cc:ssh_import_id%3A%20%5Bsmoser%5D end_cc "
+                "cc:runcmd%3A%20%5B%20%5B%20ls%2C%20-l%20%5D%20%5D end_cc",
+                {"ssh_import_id": ["smoser"], "runcmd": [["ls", "-l"]]},
             ),
         ],
     )
@@ -1189,7 +1173,7 @@ class TestMountCb:
         )
         callback = mock.Mock(autospec=True)
 
-        util.mount_cb('/dev/fake0', callback, mtype=mtype)
+        util.mount_cb("/dev/fake0", callback, mtype=mtype)
         assert (
             mock.call(
                 [
@@ -1473,7 +1457,7 @@ class TestWriteFile(helpers.TestCase):
         path = os.path.join(self.tmp, "NewFile.txt")
         contents = "Hey there"
 
-        open(path, 'w').close()
+        open(path, "w").close()
         os.chmod(path, 0o666)
 
         util.write_file(path, contents, preserve_mode=True)
@@ -1508,7 +1492,7 @@ class TestWriteFile(helpers.TestCase):
         fake_se = FakeSelinux(my_file)
 
         with mock.patch.object(
-            importer, 'import_module', return_value=fake_se
+            importer, "import_module", return_value=fake_se
         ) as mockobj:
             with util.SeLinuxGuard(my_file) as is_on:
                 self.assertTrue(is_on)
@@ -1516,7 +1500,7 @@ class TestWriteFile(helpers.TestCase):
         self.assertEqual(1, len(fake_se.restored))
         self.assertEqual(my_file, fake_se.restored[0])
 
-        mockobj.assert_called_once_with('selinux')
+        mockobj.assert_called_once_with("selinux")
 
 
 class TestDeleteDirContents(helpers.TestCase):
@@ -1587,7 +1571,7 @@ class TestDeleteDirContents(helpers.TestCase):
 
 class TestKeyValStrings(helpers.TestCase):
     def test_keyval_str_to_dict(self):
-        expected = {'1': 'one', '2': 'one+one', 'ro': True}
+        expected = {"1": "one", "2": "one+one", "ro": True}
         cmdline = "1=one ro 2=one+one"
         self.assertEqual(expected, util.keyval_str_to_dict(cmdline))
 
@@ -1595,7 +1579,7 @@ class TestKeyValStrings(helpers.TestCase):
 class TestGetCmdline(helpers.TestCase):
     def test_cmdline_reads_debug_env(self):
         with mock.patch.dict(
-            "os.environ", values={'DEBUG_PROC_CMDLINE': 'abcd 123'}
+            "os.environ", values={"DEBUG_PROC_CMDLINE": "abcd 123"}
         ):
             ret = util.get_cmdline()
         self.assertEqual("abcd 123", ret)
@@ -1606,13 +1590,13 @@ class TestLoadYaml(helpers.CiTestCase):
     with_logs = True
 
     def test_simple(self):
-        mydata = {'1': "one", '2': "two"}
+        mydata = {"1": "one", "2": "two"}
         self.assertEqual(util.load_yaml(yaml.dump(mydata)), mydata)
 
     def test_nonallowed_returns_default(self):
-        '''Any unallowed types result in returning default; log the issue.'''
+        """Any unallowed types result in returning default; log the issue."""
         # for now, anything not in the allowed list just returns the default.
-        myyaml = yaml.dump({'1': "one"})
+        myyaml = yaml.dump({"1": "one"})
         self.assertEqual(
             util.load_yaml(
                 blob=myyaml, default=self.mydefault, allowed=(str,)
@@ -1620,37 +1604,37 @@ class TestLoadYaml(helpers.CiTestCase):
             self.mydefault,
         )
         regex = re.compile(
-            r'Yaml load allows \(<(class|type) \'str\'>,\) root types, but'
-            r' got dict'
+            r"Yaml load allows \(<(class|type) \'str\'>,\) root types, but"
+            r" got dict"
         )
         self.assertTrue(
             regex.search(self.logs.getvalue()),
-            msg='Missing expected yaml load error',
+            msg="Missing expected yaml load error",
         )
 
     def test_bogus_scan_error_returns_default(self):
-        '''On Yaml scan error, load_yaml returns the default and logs issue.'''
+        """On Yaml scan error, load_yaml returns the default and logs issue."""
         badyaml = "1\n 2:"
         self.assertEqual(
             util.load_yaml(blob=badyaml, default=self.mydefault),
             self.mydefault,
         )
         self.assertIn(
-            'Failed loading yaml blob. Invalid format at line 2 column 3:'
+            "Failed loading yaml blob. Invalid format at line 2 column 3:"
             ' "mapping values are not allowed here',
             self.logs.getvalue(),
         )
 
     def test_bogus_parse_error_returns_default(self):
-        '''On Yaml parse error, load_yaml returns default and logs issue.'''
+        """On Yaml parse error, load_yaml returns default and logs issue."""
         badyaml = "{}}"
         self.assertEqual(
             util.load_yaml(blob=badyaml, default=self.mydefault),
             self.mydefault,
         )
         self.assertIn(
-            'Failed loading yaml blob. Invalid format at line 1 column 3:'
-            " \"expected \'<document start>\', but found \'}\'",
+            "Failed loading yaml blob. Invalid format at line 1 column 3:"
+            " \"expected '<document start>', but found '}'",
             self.logs.getvalue(),
         )
 
@@ -1670,7 +1654,7 @@ class TestLoadYaml(helpers.CiTestCase):
 
     def test_python_unicode(self):
         # complex type of python/unicode is explicitly allowed
-        myobj = {'1': "FOOBAR"}
+        myobj = {"1": "FOOBAR"}
         safe_yaml = yaml.dump(myobj)
         self.assertEqual(
             util.load_yaml(blob=safe_yaml, default=self.mydefault), myobj
@@ -1694,144 +1678,144 @@ class TestMountinfoParsing(helpers.ResourceUsingTestCase):
         )
         elements = line.split()
         for i in range(len(elements) + 1):
-            lines = [' '.join(elements[0:i])]
+            lines = [" ".join(elements[0:i])]
             if i < 10:
                 expected = None
             else:
-                expected = ('/dev/mapper/vg0-root', 'ext4', '/')
-            self.assertEqual(expected, util.parse_mount_info('/', lines))
+                expected = ("/dev/mapper/vg0-root", "ext4", "/")
+            self.assertEqual(expected, util.parse_mount_info("/", lines))
 
     def test_precise_ext4_root(self):
 
-        lines = helpers.readResource('mountinfo_precise_ext4.txt').splitlines()
+        lines = helpers.readResource("mountinfo_precise_ext4.txt").splitlines()
 
-        expected = ('/dev/mapper/vg0-root', 'ext4', '/')
-        self.assertEqual(expected, util.parse_mount_info('/', lines))
-        self.assertEqual(expected, util.parse_mount_info('/usr', lines))
-        self.assertEqual(expected, util.parse_mount_info('/usr/bin', lines))
+        expected = ("/dev/mapper/vg0-root", "ext4", "/")
+        self.assertEqual(expected, util.parse_mount_info("/", lines))
+        self.assertEqual(expected, util.parse_mount_info("/usr", lines))
+        self.assertEqual(expected, util.parse_mount_info("/usr/bin", lines))
 
-        expected = ('/dev/md0', 'ext4', '/boot')
-        self.assertEqual(expected, util.parse_mount_info('/boot', lines))
-        self.assertEqual(expected, util.parse_mount_info('/boot/grub', lines))
+        expected = ("/dev/md0", "ext4", "/boot")
+        self.assertEqual(expected, util.parse_mount_info("/boot", lines))
+        self.assertEqual(expected, util.parse_mount_info("/boot/grub", lines))
 
-        expected = ('/dev/mapper/vg0-root', 'ext4', '/')
-        self.assertEqual(expected, util.parse_mount_info('/home', lines))
-        self.assertEqual(expected, util.parse_mount_info('/home/me', lines))
+        expected = ("/dev/mapper/vg0-root", "ext4", "/")
+        self.assertEqual(expected, util.parse_mount_info("/home", lines))
+        self.assertEqual(expected, util.parse_mount_info("/home/me", lines))
 
-        expected = ('tmpfs', 'tmpfs', '/run')
-        self.assertEqual(expected, util.parse_mount_info('/run', lines))
+        expected = ("tmpfs", "tmpfs", "/run")
+        self.assertEqual(expected, util.parse_mount_info("/run", lines))
 
-        expected = ('none', 'tmpfs', '/run/lock')
-        self.assertEqual(expected, util.parse_mount_info('/run/lock', lines))
+        expected = ("none", "tmpfs", "/run/lock")
+        self.assertEqual(expected, util.parse_mount_info("/run/lock", lines))
 
     def test_raring_btrfs_root(self):
-        lines = helpers.readResource('mountinfo_raring_btrfs.txt').splitlines()
+        lines = helpers.readResource("mountinfo_raring_btrfs.txt").splitlines()
 
-        expected = ('/dev/vda1', 'btrfs', '/')
-        self.assertEqual(expected, util.parse_mount_info('/', lines))
-        self.assertEqual(expected, util.parse_mount_info('/usr', lines))
-        self.assertEqual(expected, util.parse_mount_info('/usr/bin', lines))
-        self.assertEqual(expected, util.parse_mount_info('/boot', lines))
-        self.assertEqual(expected, util.parse_mount_info('/boot/grub', lines))
+        expected = ("/dev/vda1", "btrfs", "/")
+        self.assertEqual(expected, util.parse_mount_info("/", lines))
+        self.assertEqual(expected, util.parse_mount_info("/usr", lines))
+        self.assertEqual(expected, util.parse_mount_info("/usr/bin", lines))
+        self.assertEqual(expected, util.parse_mount_info("/boot", lines))
+        self.assertEqual(expected, util.parse_mount_info("/boot/grub", lines))
 
-        expected = ('/dev/vda1', 'btrfs', '/home')
-        self.assertEqual(expected, util.parse_mount_info('/home', lines))
-        self.assertEqual(expected, util.parse_mount_info('/home/me', lines))
+        expected = ("/dev/vda1", "btrfs", "/home")
+        self.assertEqual(expected, util.parse_mount_info("/home", lines))
+        self.assertEqual(expected, util.parse_mount_info("/home/me", lines))
 
-        expected = ('tmpfs', 'tmpfs', '/run')
-        self.assertEqual(expected, util.parse_mount_info('/run', lines))
+        expected = ("tmpfs", "tmpfs", "/run")
+        self.assertEqual(expected, util.parse_mount_info("/run", lines))
 
-        expected = ('none', 'tmpfs', '/run/lock')
-        self.assertEqual(expected, util.parse_mount_info('/run/lock', lines))
+        expected = ("none", "tmpfs", "/run/lock")
+        self.assertEqual(expected, util.parse_mount_info("/run/lock", lines))
 
-    @mock.patch('cloudinit.util.os')
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.util.os")
+    @mock.patch("cloudinit.subp.subp")
     def test_get_device_info_from_zpool(self, zpool_output, m_os):
         # mock /dev/zfs exists
         m_os.path.exists.return_value = True
         # mock subp command from util.get_mount_info_fs_on_zpool
         zpool_output.return_value = (
-            helpers.readResource('zpool_status_simple.txt'),
-            '',
+            helpers.readResource("zpool_status_simple.txt"),
+            "",
         )
         # save function return values and do asserts
-        ret = util.get_device_info_from_zpool('vmzroot')
-        self.assertEqual('gpt/system', ret)
+        ret = util.get_device_info_from_zpool("vmzroot")
+        self.assertEqual("gpt/system", ret)
         self.assertIsNotNone(ret)
-        m_os.path.exists.assert_called_with('/dev/zfs')
+        m_os.path.exists.assert_called_with("/dev/zfs")
 
-    @mock.patch('cloudinit.util.os')
+    @mock.patch("cloudinit.util.os")
     def test_get_device_info_from_zpool_no_dev_zfs(self, m_os):
         # mock /dev/zfs missing
         m_os.path.exists.return_value = False
         # save function return values and do asserts
-        ret = util.get_device_info_from_zpool('vmzroot')
+        ret = util.get_device_info_from_zpool("vmzroot")
         self.assertIsNone(ret)
 
-    @mock.patch('cloudinit.util.os')
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.util.os")
+    @mock.patch("cloudinit.subp.subp")
     def test_get_device_info_from_zpool_handles_no_zpool(self, m_sub, m_os):
         """Handle case where there is no zpool command"""
         # mock /dev/zfs exists
         m_os.path.exists.return_value = True
         m_sub.side_effect = subp.ProcessExecutionError("No zpool cmd")
-        ret = util.get_device_info_from_zpool('vmzroot')
+        ret = util.get_device_info_from_zpool("vmzroot")
         self.assertIsNone(ret)
 
-    @mock.patch('cloudinit.util.os')
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.util.os")
+    @mock.patch("cloudinit.subp.subp")
     def test_get_device_info_from_zpool_on_error(self, zpool_output, m_os):
         # mock /dev/zfs exists
         m_os.path.exists.return_value = True
         # mock subp command from util.get_mount_info_fs_on_zpool
         zpool_output.return_value = (
-            helpers.readResource('zpool_status_simple.txt'),
-            'error',
+            helpers.readResource("zpool_status_simple.txt"),
+            "error",
         )
         # save function return values and do asserts
-        ret = util.get_device_info_from_zpool('vmzroot')
+        ret = util.get_device_info_from_zpool("vmzroot")
         self.assertIsNone(ret)
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_parse_mount_with_ext(self, mount_out):
         mount_out.return_value = (
-            helpers.readResource('mount_parse_ext.txt'),
-            '',
+            helpers.readResource("mount_parse_ext.txt"),
+            "",
         )
         # this one is valid and exists in mount_parse_ext.txt
-        ret = util.parse_mount('/var')
-        self.assertEqual(('/dev/mapper/vg00-lv_var', 'ext4', '/var'), ret)
+        ret = util.parse_mount("/var")
+        self.assertEqual(("/dev/mapper/vg00-lv_var", "ext4", "/var"), ret)
         # another one that is valid and exists
-        ret = util.parse_mount('/')
-        self.assertEqual(('/dev/mapper/vg00-lv_root', 'ext4', '/'), ret)
+        ret = util.parse_mount("/")
+        self.assertEqual(("/dev/mapper/vg00-lv_root", "ext4", "/"), ret)
         # this one exists in mount_parse_ext.txt
-        ret = util.parse_mount('/sys/kernel/debug')
+        ret = util.parse_mount("/sys/kernel/debug")
         self.assertIsNone(ret)
         # this one does not even exist in mount_parse_ext.txt
-        ret = util.parse_mount('/not/existing/mount')
+        ret = util.parse_mount("/not/existing/mount")
         self.assertIsNone(ret)
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_parse_mount_with_zfs(self, mount_out):
         mount_out.return_value = (
-            helpers.readResource('mount_parse_zfs.txt'),
-            '',
+            helpers.readResource("mount_parse_zfs.txt"),
+            "",
         )
         # this one is valid and exists in mount_parse_zfs.txt
-        ret = util.parse_mount('/var')
-        self.assertEqual(('vmzroot/ROOT/freebsd/var', 'zfs', '/var'), ret)
+        ret = util.parse_mount("/var")
+        self.assertEqual(("vmzroot/ROOT/freebsd/var", "zfs", "/var"), ret)
         # this one is the root, valid and also exists in mount_parse_zfs.txt
-        ret = util.parse_mount('/')
-        self.assertEqual(('vmzroot/ROOT/freebsd', 'zfs', '/'), ret)
+        ret = util.parse_mount("/")
+        self.assertEqual(("vmzroot/ROOT/freebsd", "zfs", "/"), ret)
         # this one does not even exist in mount_parse_ext.txt
-        ret = util.parse_mount('/not/existing/mount')
+        ret = util.parse_mount("/not/existing/mount")
         self.assertIsNone(ret)
 
 
 class TestIsX86(helpers.CiTestCase):
     def test_is_x86_matches_x86_types(self):
         """is_x86 returns True if CPU architecture matches."""
-        matched_arches = ['x86_64', 'i386', 'i586', 'i686']
+        matched_arches = ["x86_64", "i386", "i586", "i686"]
         for arch in matched_arches:
             self.assertTrue(
                 util.is_x86(arch), 'Expected is_x86 for arch "%s"' % arch
@@ -1839,16 +1823,16 @@ class TestIsX86(helpers.CiTestCase):
 
     def test_is_x86_unmatched_types(self):
         """is_x86 returns Fale on non-intel x86 architectures."""
-        unmatched_arches = ['ia64', '9000/800', 'arm64v71']
+        unmatched_arches = ["ia64", "9000/800", "arm64v71"]
         for arch in unmatched_arches:
             self.assertFalse(
                 util.is_x86(arch), 'Expected not is_x86 for arch "%s"' % arch
             )
 
-    @mock.patch('cloudinit.util.os.uname')
+    @mock.patch("cloudinit.util.os.uname")
     def test_is_x86_calls_uname_for_architecture(self, m_uname):
         """is_x86 returns True if platform from uname matches."""
-        m_uname.return_value = [0, 1, 2, 3, 'x86_64']
+        m_uname.return_value = [0, 1, 2, 3, "x86_64"]
         self.assertTrue(util.is_x86())
 
 
@@ -1861,18 +1845,18 @@ class TestGetConfigLogfiles(helpers.CiTestCase):
     def test_default_log_file_present(self):
         """When default_log_file is set get_config_logfiles finds it."""
         self.assertEqual(
-            ['/my.log'], util.get_config_logfiles({'def_log_file': '/my.log'})
+            ["/my.log"], util.get_config_logfiles({"def_log_file": "/my.log"})
         )
 
     def test_output_logs_parsed_when_teeing_files(self):
         """When output configuration is parsed when teeing files."""
         self.assertEqual(
-            ['/himom.log', '/my.log'],
+            ["/himom.log", "/my.log"],
             sorted(
                 util.get_config_logfiles(
                     {
-                        'def_log_file': '/my.log',
-                        'output': {'all': '|tee -a /himom.log'},
+                        "def_log_file": "/my.log",
+                        "output": {"all": "|tee -a /himom.log"},
                     }
                 )
             ),
@@ -1881,12 +1865,12 @@ class TestGetConfigLogfiles(helpers.CiTestCase):
     def test_output_logs_parsed_when_redirecting(self):
         """When output configuration is parsed when redirecting to a file."""
         self.assertEqual(
-            ['/my.log', '/test.log'],
+            ["/my.log", "/test.log"],
             sorted(
                 util.get_config_logfiles(
                     {
-                        'def_log_file': '/my.log',
-                        'output': {'all': '>/test.log'},
+                        "def_log_file": "/my.log",
+                        "output": {"all": ">/test.log"},
                     }
                 )
             ),
@@ -1895,12 +1879,12 @@ class TestGetConfigLogfiles(helpers.CiTestCase):
     def test_output_logs_parsed_when_appending(self):
         """When output configuration is parsed when appending to a file."""
         self.assertEqual(
-            ['/my.log', '/test.log'],
+            ["/my.log", "/test.log"],
             sorted(
                 util.get_config_logfiles(
                     {
-                        'def_log_file': '/my.log',
-                        'output': {'all': '>> /test.log'},
+                        "def_log_file": "/my.log",
+                        "output": {"all": ">> /test.log"},
                     }
                 )
             ),
@@ -1909,8 +1893,8 @@ class TestGetConfigLogfiles(helpers.CiTestCase):
 
 class TestMultiLog(helpers.FilesystemMockingTestCase):
     def _createConsole(self, root):
-        os.mkdir(os.path.join(root, 'dev'))
-        open(os.path.join(root, 'dev', 'console'), 'a').close()
+        os.mkdir(os.path.join(root, "dev"))
+        open(os.path.join(root, "dev", "console"), "a").close()
 
     def setUp(self):
         super(TestMultiLog, self).setUp()
@@ -1924,37 +1908,37 @@ class TestMultiLog(helpers.FilesystemMockingTestCase):
         self.patchStdoutAndStderr(self.stdout, self.stderr)
 
     def test_stderr_used_by_default(self):
-        logged_string = 'test stderr output'
+        logged_string = "test stderr output"
         util.multi_log(logged_string)
         self.assertEqual(logged_string, self.stderr.getvalue())
 
     def test_stderr_not_used_if_false(self):
-        util.multi_log('should not see this', stderr=False)
-        self.assertEqual('', self.stderr.getvalue())
+        util.multi_log("should not see this", stderr=False)
+        self.assertEqual("", self.stderr.getvalue())
 
     def test_logs_go_to_console_by_default(self):
         self._createConsole(self.root)
-        logged_string = 'something very important'
+        logged_string = "something very important"
         util.multi_log(logged_string)
-        self.assertEqual(logged_string, open('/dev/console').read())
+        self.assertEqual(logged_string, open("/dev/console").read())
 
     def test_logs_dont_go_to_stdout_if_console_exists(self):
         self._createConsole(self.root)
-        util.multi_log('something')
-        self.assertEqual('', self.stdout.getvalue())
+        util.multi_log("something")
+        self.assertEqual("", self.stdout.getvalue())
 
     def test_logs_go_to_stdout_if_console_does_not_exist(self):
-        logged_string = 'something very important'
+        logged_string = "something very important"
         util.multi_log(logged_string)
         self.assertEqual(logged_string, self.stdout.getvalue())
 
     def test_logs_dont_go_to_stdout_if_fallback_to_stdout_is_false(self):
-        util.multi_log('something', fallback_to_stdout=False)
-        self.assertEqual('', self.stdout.getvalue())
+        util.multi_log("something", fallback_to_stdout=False)
+        self.assertEqual("", self.stdout.getvalue())
 
     def test_logs_go_to_log_if_given(self):
         log = mock.MagicMock()
-        logged_string = 'something very important'
+        logged_string = "something very important"
         util.multi_log(logged_string, log=log)
         self.assertEqual(
             [((mock.ANY, logged_string), {})], log.log.call_args_list
@@ -1962,26 +1946,26 @@ class TestMultiLog(helpers.FilesystemMockingTestCase):
 
     def test_newlines_stripped_from_log_call(self):
         log = mock.MagicMock()
-        expected_string = 'something very important'
-        util.multi_log('{0}\n'.format(expected_string), log=log)
+        expected_string = "something very important"
+        util.multi_log("{0}\n".format(expected_string), log=log)
         self.assertEqual((mock.ANY, expected_string), log.log.call_args[0])
 
     def test_log_level_defaults_to_debug(self):
         log = mock.MagicMock()
-        util.multi_log('message', log=log)
+        util.multi_log("message", log=log)
         self.assertEqual((logging.DEBUG, mock.ANY), log.log.call_args[0])
 
     def test_given_log_level_used(self):
         log = mock.MagicMock()
         log_level = mock.Mock()
-        util.multi_log('message', log=log, log_level=log_level)
+        util.multi_log("message", log=log, log_level=log_level)
         self.assertEqual((log_level, mock.ANY), log.log.call_args[0])
 
 
 class TestMessageFromString(helpers.TestCase):
     def test_unicode_not_messed_up(self):
-        roundtripped = util.message_from_string('\n').as_string()
-        self.assertNotIn('\x00', roundtripped)
+        roundtripped = util.message_from_string("\n").as_string()
+        self.assertNotIn("\x00", roundtripped)
 
 
 class TestReadSeeded(helpers.TestCase):
@@ -1995,12 +1979,12 @@ class TestReadSeeded(helpers.TestCase):
         vd = b"vendordatablob"
         helpers.populate_dir(
             self.tmp,
-            {'meta-data': "key1: val1", 'user-data': ud, 'vendor-data': vd},
+            {"meta-data": "key1: val1", "user-data": ud, "vendor-data": vd},
         )
         sdir = self.tmp + os.path.sep
         (found_md, found_ud, found_vd) = util.read_seeded(sdir)
 
-        self.assertEqual(found_md, {'key1': 'val1'})
+        self.assertEqual(found_md, {"key1": "val1"})
         self.assertEqual(found_ud, ud)
         self.assertEqual(found_vd, vd)
 
@@ -2015,12 +1999,12 @@ class TestReadSeededWithoutVendorData(helpers.TestCase):
         ud = b"userdatablob"
         vd = None
         helpers.populate_dir(
-            self.tmp, {'meta-data': "key1: val1", 'user-data': ud}
+            self.tmp, {"meta-data": "key1: val1", "user-data": ud}
         )
         sdir = self.tmp + os.path.sep
         (found_md, found_ud, found_vd) = util.read_seeded(sdir)
 
-        self.assertEqual(found_md, {'key1': 'val1'})
+        self.assertEqual(found_md, {"key1": "val1"})
         self.assertEqual(found_ud, ud)
         self.assertEqual(found_vd, vd)
 
@@ -2029,7 +2013,7 @@ class TestEncode(helpers.TestCase):
     """Test the encoding functions"""
 
     def test_decode_binary_plain_text_with_hex(self):
-        blob = 'BOOTABLE_FLAG=\x80init=/bin/systemd'
+        blob = "BOOTABLE_FLAG=\x80init=/bin/systemd"
         text = util.decode_binary(blob)
         self.assertEqual(text, blob)
 
@@ -2037,20 +2021,20 @@ class TestEncode(helpers.TestCase):
 class TestProcessExecutionError(helpers.TestCase):
 
     template = (
-        '{description}\n'
-        'Command: {cmd}\n'
-        'Exit code: {exit_code}\n'
-        'Reason: {reason}\n'
-        'Stdout: {stdout}\n'
-        'Stderr: {stderr}'
+        "{description}\n"
+        "Command: {cmd}\n"
+        "Exit code: {exit_code}\n"
+        "Reason: {reason}\n"
+        "Stdout: {stdout}\n"
+        "Stderr: {stderr}"
     )
-    empty_attr = '-'
-    empty_description = 'Unexpected error while running command.'
+    empty_attr = "-"
+    empty_description = "Unexpected error while running command."
 
     def test_pexec_error_indent_text(self):
         error = subp.ProcessExecutionError()
-        msg = 'abc\ndef'
-        formatted = 'abc\n{0}def'.format(' ' * 4)
+        msg = "abc\ndef"
+        formatted = "abc\n{0}def".format(" " * 4)
         self.assertEqual(error._indent_text(msg, indent_level=4), formatted)
         self.assertEqual(
             error._indent_text(msg.encode(), indent_level=4),
@@ -2085,9 +2069,9 @@ class TestProcessExecutionError(helpers.TestCase):
         )
 
     def test_pexec_error_single_line_msgs(self):
-        stdout_msg = 'out out'
-        stderr_msg = 'error error'
-        cmd = 'test command'
+        stdout_msg = "out out"
+        stderr_msg = "error error"
+        cmd = "test command"
         exit_code = 3
         error = subp.ProcessExecutionError(
             stdout=stdout_msg, stderr=stderr_msg, exit_code=3, cmd=cmd
@@ -2106,25 +2090,25 @@ class TestProcessExecutionError(helpers.TestCase):
 
     def test_pexec_error_multi_line_msgs(self):
         # make sure bytes is converted handled properly when formatting
-        stdout_msg = 'multi\nline\noutput message'.encode()
-        stderr_msg = 'multi\nline\nerror message\n\n\n'
+        stdout_msg = "multi\nline\noutput message".encode()
+        stderr_msg = "multi\nline\nerror message\n\n\n"
         error = subp.ProcessExecutionError(
             stdout=stdout_msg, stderr=stderr_msg
         )
         self.assertEqual(
             str(error),
-            '\n'.join(
+            "\n".join(
                 (
-                    '{description}',
-                    'Command: {empty_attr}',
-                    'Exit code: {empty_attr}',
-                    'Reason: {empty_attr}',
-                    'Stdout: multi',
-                    '        line',
-                    '        output message',
-                    'Stderr: multi',
-                    '        line',
-                    '        error message',
+                    "{description}",
+                    "Command: {empty_attr}",
+                    "Exit code: {empty_attr}",
+                    "Reason: {empty_attr}",
+                    "Stdout: multi",
+                    "        line",
+                    "        output message",
+                    "Stderr: multi",
+                    "        line",
+                    "        error message",
                 )
             ).format(
                 description=self.empty_description, empty_attr=self.empty_attr
@@ -2135,31 +2119,31 @@ class TestProcessExecutionError(helpers.TestCase):
 class TestSystemIsSnappy(helpers.FilesystemMockingTestCase):
     def test_id_in_os_release_quoted(self):
         """os-release containing ID="ubuntu-core" is snappy."""
-        orcontent = '\n'.join(['ID="ubuntu-core"', ''])
+        orcontent = "\n".join(['ID="ubuntu-core"', ""])
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {'etc/os-release': orcontent})
+        helpers.populate_dir(root_d, {"etc/os-release": orcontent})
         self.reRoot(root_d)
         self.assertTrue(util.system_is_snappy())
 
     def test_id_in_os_release(self):
         """os-release containing ID=ubuntu-core is snappy."""
-        orcontent = '\n'.join(['ID=ubuntu-core', ''])
+        orcontent = "\n".join(["ID=ubuntu-core", ""])
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {'etc/os-release': orcontent})
+        helpers.populate_dir(root_d, {"etc/os-release": orcontent})
         self.reRoot(root_d)
         self.assertTrue(util.system_is_snappy())
 
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_bad_content_in_os_release_no_effect(self, m_cmdline):
         """malformed os-release should not raise exception."""
-        m_cmdline.return_value = 'root=/dev/sda'
-        orcontent = '\n'.join(['IDubuntu-core', ''])
+        m_cmdline.return_value = "root=/dev/sda"
+        orcontent = "\n".join(["IDubuntu-core", ""])
         root_d = self.tmp_dir()
-        helpers.populate_dir(root_d, {'etc/os-release': orcontent})
+        helpers.populate_dir(root_d, {"etc/os-release": orcontent})
         self.reRoot()
         self.assertFalse(util.system_is_snappy())
 
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_snap_core_in_cmdline_is_snappy(self, m_cmdline):
         """The string snap_core= in kernel cmdline indicates snappy."""
         cmdline = (
@@ -2172,31 +2156,31 @@ class TestSystemIsSnappy(helpers.FilesystemMockingTestCase):
         self.assertTrue(util.system_is_snappy())
         self.assertTrue(m_cmdline.call_count > 0)
 
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_nothing_found_is_not_snappy(self, m_cmdline):
         """If no positive identification, then not snappy."""
-        m_cmdline.return_value = 'root=/dev/sda'
+        m_cmdline.return_value = "root=/dev/sda"
         self.reRoot()
         self.assertFalse(util.system_is_snappy())
         self.assertTrue(m_cmdline.call_count > 0)
 
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_channel_ini_with_snappy_is_snappy(self, m_cmdline):
         """A Channel.ini file with 'ubuntu-core' indicates snappy."""
-        m_cmdline.return_value = 'root=/dev/sda'
+        m_cmdline.return_value = "root=/dev/sda"
         root_d = self.tmp_dir()
-        content = '\n'.join(["[Foo]", "source = 'ubuntu-core'", ""])
-        helpers.populate_dir(root_d, {'etc/system-image/channel.ini': content})
+        content = "\n".join(["[Foo]", "source = 'ubuntu-core'", ""])
+        helpers.populate_dir(root_d, {"etc/system-image/channel.ini": content})
         self.reRoot(root_d)
         self.assertTrue(util.system_is_snappy())
 
-    @mock.patch('cloudinit.util.get_cmdline')
+    @mock.patch("cloudinit.util.get_cmdline")
     def test_system_image_config_dir_is_snappy(self, m_cmdline):
         """Existence of /etc/system-image/config.d indicates snappy."""
-        m_cmdline.return_value = 'root=/dev/sda'
+        m_cmdline.return_value = "root=/dev/sda"
         root_d = self.tmp_dir()
         helpers.populate_dir(
-            root_d, {'etc/system-image/config.d/my.file': "_unused"}
+            root_d, {"etc/system-image/config.d/my.file": "_unused"}
         )
         self.reRoot(root_d)
         self.assertTrue(util.system_is_snappy())
@@ -2206,16 +2190,16 @@ class TestLoadShellContent(helpers.TestCase):
     def test_comments_handled_correctly(self):
         """Shell comments should be allowed in the content."""
         self.assertEqual(
-            {'key1': 'val1', 'key2': 'val2', 'key3': 'val3 #tricky'},
+            {"key1": "val1", "key2": "val2", "key3": "val3 #tricky"},
             util.load_shell_content(
-                '\n'.join(
+                "\n".join(
                     [
                         "#top of file comment",
                         "key1=val1 #this is a comment",
                         "# second comment",
                         'key2="val2" # inlin comment#badkey=wark',
                         'key3="val3 #tricky"',
-                        '',
+                        "",
                     ]
                 )
             ),
@@ -2225,15 +2209,15 @@ class TestLoadShellContent(helpers.TestCase):
 class TestGetProcEnv(helpers.TestCase):
     """test get_proc_env."""
 
-    null = b'\x00'
-    simple1 = b'HOME=/'
-    simple2 = b'PATH=/bin:/sbin'
-    bootflag = b'BOOTABLE_FLAG=\x80'  # from LP: #1775371
-    mixed = b'MIXED=' + b'ab\xccde'
+    null = b"\x00"
+    simple1 = b"HOME=/"
+    simple2 = b"PATH=/bin:/sbin"
+    bootflag = b"BOOTABLE_FLAG=\x80"  # from LP: #1775371
+    mixed = b"MIXED=" + b"ab\xccde"
 
-    def _val_decoded(self, blob, encoding='utf-8', errors='replace'):
+    def _val_decoded(self, blob, encoding="utf-8", errors="replace"):
         # return the value portion of key=val decoded.
-        return blob.split(b'=', 1)[1].decode(encoding, errors)
+        return blob.split(b"=", 1)[1].decode(encoding, errors)
 
     @mock.patch("cloudinit.util.load_file")
     def test_non_utf8_in_environment(self, m_load_file):
@@ -2245,10 +2229,10 @@ class TestGetProcEnv(helpers.TestCase):
 
         self.assertEqual(
             {
-                'BOOTABLE_FLAG': self._val_decoded(self.bootflag),
-                'HOME': '/',
-                'PATH': '/bin:/sbin',
-                'MIXED': self._val_decoded(self.mixed),
+                "BOOTABLE_FLAG": self._val_decoded(self.bootflag),
+                "HOME": "/",
+                "PATH": "/bin:/sbin",
+                "MIXED": self._val_decoded(self.mixed),
             },
             util.get_proc_env(1),
         )
@@ -2262,7 +2246,7 @@ class TestGetProcEnv(helpers.TestCase):
         m_load_file.return_value = content
 
         self.assertEqual(
-            dict([t.split(b'=') for t in lines]),
+            dict([t.split(b"=") for t in lines]),
             util.get_proc_env(1, encoding=None),
         )
         self.assertEqual(1, m_load_file.call_count)
@@ -2273,7 +2257,7 @@ class TestGetProcEnv(helpers.TestCase):
         content = self.null.join((self.simple1, self.simple2))
         m_load_file.return_value = content
         self.assertEqual(
-            {'HOME': '/', 'PATH': '/bin:/sbin'}, util.get_proc_env(1)
+            {"HOME": "/", "PATH": "/bin:/sbin"}, util.get_proc_env(1)
         )
         self.assertEqual(1, m_load_file.call_count)
 
@@ -2296,13 +2280,13 @@ class TestKernelVersion:
     """test kernel version function"""
 
     params = [
-        ('5.6.19-300.fc32.x86_64', (5, 6)),
-        ('4.15.0-101-generic', (4, 15)),
-        ('3.10.0-1062.12.1.vz7.131.10', (3, 10)),
-        ('4.18.0-144.el8.x86_64', (4, 18)),
+        ("5.6.19-300.fc32.x86_64", (5, 6)),
+        ("4.15.0-101-generic", (4, 15)),
+        ("3.10.0-1062.12.1.vz7.131.10", (3, 10)),
+        ("4.18.0-144.el8.x86_64", (4, 18)),
     ]
 
-    @mock.patch('os.uname')
+    @mock.patch("os.uname")
     @pytest.mark.parametrize("uname_release,expected", params)
     def test_kernel_version(self, m_uname, uname_release, expected):
         m_uname.return_value.release = uname_release
@@ -2310,11 +2294,11 @@ class TestKernelVersion:
 
 
 class TestFindDevs:
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_find_devs_with(self, m_subp):
         m_subp.return_value = (
             '/dev/sda1: UUID="some-uuid" TYPE="ext4" PARTUUID="some-partid"',
-            '',
+            "",
         )
         devlist = util.find_devs_with()
         assert devlist == [
@@ -2326,32 +2310,32 @@ class TestFindDevs:
             '/dev/sda1: UUID="some-uuid" TYPE="ext4" PARTUUID="some-partid"'
         ]
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_find_devs_with_openbsd(self, m_subp):
-        m_subp.return_value = ('cd0:,sd0:630d98d32b5d3759,sd1:,fd0:', '')
+        m_subp.return_value = ("cd0:,sd0:630d98d32b5d3759,sd1:,fd0:", "")
         devlist = util.find_devs_with_openbsd()
-        assert devlist == ['/dev/cd0a', '/dev/sd1a', '/dev/sd1i']
+        assert devlist == ["/dev/cd0a", "/dev/sd1a", "/dev/sd1i"]
 
-    @mock.patch('cloudinit.subp.subp')
+    @mock.patch("cloudinit.subp.subp")
     def test_find_devs_with_openbsd_with_criteria(self, m_subp):
-        m_subp.return_value = ('cd0:,sd0:630d98d32b5d3759,sd1:,fd0:', '')
+        m_subp.return_value = ("cd0:,sd0:630d98d32b5d3759,sd1:,fd0:", "")
         devlist = util.find_devs_with_openbsd(criteria="TYPE=iso9660")
-        assert devlist == ['/dev/cd0a', '/dev/sd1a', '/dev/sd1i']
+        assert devlist == ["/dev/cd0a", "/dev/sd1a", "/dev/sd1i"]
 
         # lp: #1841466
         devlist = util.find_devs_with_openbsd(criteria="LABEL_FATBOOT=A_LABEL")
-        assert devlist == ['/dev/cd0a', '/dev/sd1a', '/dev/sd1i']
+        assert devlist == ["/dev/cd0a", "/dev/sd1a", "/dev/sd1i"]
 
     @pytest.mark.parametrize(
-        'criteria,expected_devlist',
+        "criteria,expected_devlist",
         (
-            (None, ['/dev/msdosfs/EFISYS', '/dev/iso9660/config-2']),
-            ('TYPE=iso9660', ['/dev/iso9660/config-2']),
-            ('TYPE=vfat', ['/dev/msdosfs/EFISYS']),
-            ('LABEL_FATBOOT=A_LABEL', []),  # lp: #1841466
+            (None, ["/dev/msdosfs/EFISYS", "/dev/iso9660/config-2"]),
+            ("TYPE=iso9660", ["/dev/iso9660/config-2"]),
+            ("TYPE=vfat", ["/dev/msdosfs/EFISYS"]),
+            ("LABEL_FATBOOT=A_LABEL", []),  # lp: #1841466
         ),
     )
-    @mock.patch('glob.glob')
+    @mock.patch("glob.glob")
     def test_find_devs_with_freebsd(self, m_glob, criteria, expected_devlist):
         def fake_glob(pattern):
             msdos = ["/dev/msdosfs/EFISYS"]
@@ -2368,14 +2352,14 @@ class TestFindDevs:
         assert devlist == expected_devlist
 
     @pytest.mark.parametrize(
-        'criteria,expected_devlist',
+        "criteria,expected_devlist",
         (
-            (None, ['/dev/ld0', '/dev/dk0', '/dev/dk1', '/dev/cd0']),
-            ('TYPE=iso9660', ['/dev/cd0']),
-            ('TYPE=vfat', ["/dev/ld0", "/dev/dk0", "/dev/dk1"]),
+            (None, ["/dev/ld0", "/dev/dk0", "/dev/dk1", "/dev/cd0"]),
+            ("TYPE=iso9660", ["/dev/cd0"]),
+            ("TYPE=vfat", ["/dev/ld0", "/dev/dk0", "/dev/dk1"]),
             (
-                'LABEL_FATBOOT=A_LABEL',  # lp: #1841466
-                ['/dev/ld0', '/dev/dk0', '/dev/dk1', '/dev/cd0'],
+                "LABEL_FATBOOT=A_LABEL",  # lp: #1841466
+                ["/dev/ld0", "/dev/dk0", "/dev/dk1", "/dev/cd0"],
             ),
         ),
     )
@@ -2384,39 +2368,31 @@ class TestFindDevs:
         side_effect_values = [
             ("ld0 dk0 dk1 cd0", ""),
             (
-                (
-                    "mscdlabel: CDIOREADTOCHEADER: "
-                    "Inappropriate ioctl for device\n"
-                    "track (ctl=4) at sector 0\n"
-                    "disklabel not written\n"
-                ),
+                "mscdlabel: CDIOREADTOCHEADER: "
+                "Inappropriate ioctl for device\n"
+                "track (ctl=4) at sector 0\n"
+                "disklabel not written\n",
                 "",
             ),
             (
-                (
-                    "mscdlabel: CDIOREADTOCHEADER: "
-                    "Inappropriate ioctl for device\n"
-                    "track (ctl=4) at sector 0\n"
-                    "disklabel not written\n"
-                ),
+                "mscdlabel: CDIOREADTOCHEADER: "
+                "Inappropriate ioctl for device\n"
+                "track (ctl=4) at sector 0\n"
+                "disklabel not written\n",
                 "",
             ),
             (
-                (
-                    "mscdlabel: CDIOREADTOCHEADER: "
-                    "Inappropriate ioctl for device\n"
-                    "track (ctl=4) at sector 0\n"
-                    "disklabel not written\n"
-                ),
+                "mscdlabel: CDIOREADTOCHEADER: "
+                "Inappropriate ioctl for device\n"
+                "track (ctl=4) at sector 0\n"
+                "disklabel not written\n",
                 "",
             ),
             (
-                (
-                    "track (ctl=4) at sector 0\n"
-                    'ISO filesystem, label "config-2", '
-                    "creation time: 2020/03/31 17:29\n"
-                    "adding as 'a'\n"
-                ),
+                "track (ctl=4) at sector 0\n"
+                'ISO filesystem, label "config-2", '
+                "creation time: 2020/03/31 17:29\n"
+                "adding as 'a'\n",
                 "",
             ),
         ]
@@ -2425,14 +2401,14 @@ class TestFindDevs:
         assert devlist == expected_devlist
 
     @pytest.mark.parametrize(
-        'criteria,expected_devlist',
+        "criteria,expected_devlist",
         (
-            (None, ['/dev/vbd0', '/dev/cd0', '/dev/acd0']),
-            ('TYPE=iso9660', ['/dev/cd0', '/dev/acd0']),
-            ('TYPE=vfat', ['/dev/vbd0']),
+            (None, ["/dev/vbd0", "/dev/cd0", "/dev/acd0"]),
+            ("TYPE=iso9660", ["/dev/cd0", "/dev/acd0"]),
+            ("TYPE=vfat", ["/dev/vbd0"]),
             (
-                'LABEL_FATBOOT=A_LABEL',  # lp: #1841466
-                ['/dev/vbd0', '/dev/cd0', '/dev/acd0'],
+                "LABEL_FATBOOT=A_LABEL",  # lp: #1841466
+                ["/dev/vbd0", "/dev/cd0", "/dev/acd0"],
             ),
         ),
     )
@@ -2440,7 +2416,7 @@ class TestFindDevs:
     def test_find_devs_with_dragonflybsd(
         self, m_subp, criteria, expected_devlist
     ):
-        m_subp.return_value = ('md2 md1 cd0 vbd0 acd0 vn3 vn2 vn1 vn0 md0', '')
+        m_subp.return_value = ("md2 md1 cd0 vbd0 acd0 vn3 vn2 vn1 vn0 md0", "")
         devlist = util.find_devs_with_dragonflybsd(criteria=criteria)
         assert devlist == expected_devlist
 
diff --git a/tests/unittests/test_version.py b/tests/unittests/test_version.py
index ed66b09f..8ac8aea6 100644
--- a/tests/unittests/test_version.py
+++ b/tests/unittests/test_version.py
@@ -2,21 +2,22 @@
 
 from unittest import mock
 
-from tests.unittests.helpers import CiTestCase
 from cloudinit import version
+from tests.unittests.helpers import CiTestCase
 
 
 class TestExportsFeatures(CiTestCase):
     def test_has_network_config_v1(self):
-        self.assertIn('NETWORK_CONFIG_V1', version.FEATURES)
+        self.assertIn("NETWORK_CONFIG_V1", version.FEATURES)
 
     def test_has_network_config_v2(self):
-        self.assertIn('NETWORK_CONFIG_V2', version.FEATURES)
+        self.assertIn("NETWORK_CONFIG_V2", version.FEATURES)
 
 
 class TestVersionString(CiTestCase):
-    @mock.patch("cloudinit.version._PACKAGED_VERSION",
-                "17.2-3-gb05b9972-0ubuntu1")
+    @mock.patch(
+        "cloudinit.version._PACKAGED_VERSION", "17.2-3-gb05b9972-0ubuntu1"
+    )
     def test_package_version_respected(self):
         """If _PACKAGED_VERSION is filled in, then it should be returned."""
         self.assertEqual("17.2-3-gb05b9972-0ubuntu1", version.version_string())
diff --git a/tests/unittests/util.py b/tests/unittests/util.py
index 2204c28f..79a6e1d0 100644
--- a/tests/unittests/util.py
+++ b/tests/unittests/util.py
@@ -27,15 +27,17 @@ def get_cloud(distro=None, paths=None, sys_cfg=None, metadata=None):
 
 def abstract_to_concrete(abclass):
     """Takes an abstract class and returns a concrete version of it."""
+
     class concreteCls(abclass):
         pass
+
     concreteCls.__abstractmethods__ = frozenset()
-    return type('DummyConcrete' + abclass.__name__, (concreteCls,), {})
+    return type("DummyConcrete" + abclass.__name__, (concreteCls,), {})
 
 
 class DataSourceTesting(DataSourceNone):
     def get_hostname(self, fqdn=False, resolve_ip=False, metadata_only=False):
-        return 'hostname'
+        return "hostname"
 
     def persist_instance_data(self):
         return True
@@ -46,7 +48,7 @@ class DataSourceTesting(DataSourceNone):
 
     @property
     def cloud_name(self):
-        return 'testing'
+        return "testing"
 
 
 class MockDistro(distros.Distro):
@@ -68,7 +70,7 @@ class MockDistro(distros.Distro):
         return True
 
     def get_primary_arch(self):
-        return 'i386'
+        return "i386"
 
     def get_package_mirror_info(self, arch=None, data_source=None):
         pass
@@ -110,7 +112,7 @@ class MockDistro(distros.Distro):
         pass
 
     def add_snap_user(self, name, **kwargs):
-        return 'snap_user'
+        return "snap_user"
 
     def create_user(self, name, **kwargs):
         return True
@@ -124,7 +126,7 @@ class MockDistro(distros.Distro):
     def set_passwd(self, user, passwd, hashed=False):
         return True
 
-    def ensure_sudo_dir(self, path, sudo_base='/etc/sudoers'):
+    def ensure_sudo_dir(self, path, sudo_base="/etc/sudoers"):
         pass
 
     def write_sudo_rules(self, user, rules, sudo_file=None):
diff --git a/tools/mock-meta.py b/tools/mock-meta.py
index 9dd067b9..4ac1ea4f 100755
--- a/tools/mock-meta.py
+++ b/tools/mock-meta.py
@@ -36,74 +36,74 @@ except ImportError:
     from http import client as hclient
 
 
-log = logging.getLogger('meta-server')
+log = logging.getLogger("meta-server")
 
 EC2_VERSIONS = [
-    '1.0',
-    '2007-01-19',
-    '2007-03-01',
-    '2007-08-29',
-    '2007-10-10',
-    '2007-12-15',
-    '2008-02-01',
-    '2008-09-01',
-    '2009-04-04',
+    "1.0",
+    "2007-01-19",
+    "2007-03-01",
+    "2007-08-29",
+    "2007-10-10",
+    "2007-12-15",
+    "2008-02-01",
+    "2008-09-01",
+    "2009-04-04",
 ]
 
 BLOCK_DEVS = [
-    'ami',
-    'ephemeral0',
-    'root',
+    "ami",
+    "ephemeral0",
+    "root",
 ]
 
-DEV_PREFIX = 'v'  # This seems to vary alot depending on images...
+DEV_PREFIX = "v"  # This seems to vary alot depending on images...
 DEV_MAPPINGS = {
-    'ephemeral0': '%sda2' % (DEV_PREFIX),
-    'root': '/dev/%sda1' % (DEV_PREFIX),
-    'ami': '%sda1' % (DEV_PREFIX),
-    'swap': '%sda3' % (DEV_PREFIX),
+    "ephemeral0": "%sda2" % (DEV_PREFIX),
+    "root": "/dev/%sda1" % (DEV_PREFIX),
+    "ami": "%sda1" % (DEV_PREFIX),
+    "swap": "%sda3" % (DEV_PREFIX),
 }
 
 META_CAPABILITIES = [
-    'aki-id',
-    'ami-id',
-    'ami-launch-index',
-    'ami-manifest-path',
-    'ari-id',
-    'block-device-mapping/',
-    'hostname',
-    'instance-action',
-    'instance-id',
-    'instance-type',
-    'local-hostname',
-    'local-ipv4',
-    'placement/',
-    'product-codes',
-    'public-hostname',
-    'public-ipv4',
-    'public-keys/',
-    'reservation-id',
-    'security-groups'
+    "aki-id",
+    "ami-id",
+    "ami-launch-index",
+    "ami-manifest-path",
+    "ari-id",
+    "block-device-mapping/",
+    "hostname",
+    "instance-action",
+    "instance-id",
+    "instance-type",
+    "local-hostname",
+    "local-ipv4",
+    "placement/",
+    "product-codes",
+    "public-hostname",
+    "public-ipv4",
+    "public-keys/",
+    "reservation-id",
+    "security-groups",
 ]
 
 PUB_KEYS = {
-    'brickies': [
-        ('ssh-rsa '
-         'AAAAB3NzaC1yc2EAAAABIwAAAQEA3I7VUf2l5gSn5uavROsc5HRDpZdQueUq5ozemN'
-         'Sj8T7enqKHOEaFoU2VoPgGEWC9RyzSQVeyD6s7APMcE82EtmW4skVEgEGSbDc1pvxz'
-         'xtchBj78hJP6Cf5TCMFSXw+Fz5rF1dR23QDbN1mkHs7adr8GW4kSWqU7Q7NDwfIrJJ'
-         'tO7Hi42GyXtvEONHbiRPOe8stqUly7MvUoN+5kfjBM8Qqpfl2+FNhTYWpMfYdPUnE7'
-         'u536WqzFmsaqJctz3gBxH9Ex7dFtrxR4qiqEr9Qtlu3xGn7Bw07/+i1D+ey3ONkZLN'
-         '+LQ714cgj8fRS4Hj29SCmXp5Kt5/82cD/VN3NtHw== brickies'),
-        '',
+    "brickies": [
+        "ssh-rsa "
+        "AAAAB3NzaC1yc2EAAAABIwAAAQEA3I7VUf2l5gSn5uavROsc5HRDpZdQueUq5ozemN"
+        "Sj8T7enqKHOEaFoU2VoPgGEWC9RyzSQVeyD6s7APMcE82EtmW4skVEgEGSbDc1pvxz"
+        "xtchBj78hJP6Cf5TCMFSXw+Fz5rF1dR23QDbN1mkHs7adr8GW4kSWqU7Q7NDwfIrJJ"
+        "tO7Hi42GyXtvEONHbiRPOe8stqUly7MvUoN+5kfjBM8Qqpfl2+FNhTYWpMfYdPUnE7"
+        "u536WqzFmsaqJctz3gBxH9Ex7dFtrxR4qiqEr9Qtlu3xGn7Bw07/+i1D+ey3ONkZLN"
+        "+LQ714cgj8fRS4Hj29SCmXp5Kt5/82cD/VN3NtHw== brickies",
+        "",
     ],
 }
 
 INSTANCE_TYPES = [
-    'm1.large',
-    'm1.medium',
-    'm1.small',
-    'm1.xlarge',
+    "m1.large",
+    "m1.medium",
+    "m1.small",
+    "m1.xlarge",
 ]
 
 AVAILABILITY_ZONES = [
@@ -111,13 +111,13 @@ AVAILABILITY_ZONES = [
     "us-east-1b",
     "us-east-1c",
     "us-east-1d",
-    'eu-west-1a',
-    'eu-west-1b',
-    'us-west-1',
+    "eu-west-1a",
+    "eu-west-1b",
+    "us-west-1",
 ]
 
 PLACEMENT_CAPABILITIES = {
-    'availability-zone': AVAILABILITY_ZONES,
+    "availability-zone": AVAILABILITY_ZONES,
 }
 
 NOT_IMPL_RESPONSE = json.dumps({})
@@ -130,12 +130,14 @@ class WebException(Exception):
 
 
 def yamlify(data):
-    formatted = yaml.dump(data,
-                          line_break="\n",
-                          indent=4,
-                          explicit_start=True,
-                          explicit_end=True,
-                          default_flow_style=False)
+    formatted = yaml.dump(
+        data,
+        line_break="\n",
+        indent=4,
+        explicit_start=True,
+        explicit_end=True,
+        default_flow_style=False,
+    )
     return formatted
 
 
@@ -164,7 +166,7 @@ ID_CHARS = [c for c in (string.ascii_uppercase + string.digits)]
 
 
 def id_generator(size=6, lower=False):
-    txt = ''.join(random.choice(ID_CHARS) for x in range(size))
+    txt = "".join(random.choice(ID_CHARS) for x in range(size))
     if lower:
         return txt.lower()
     else:
@@ -176,14 +178,14 @@ def get_ssh_keys():
     keys.update(PUB_KEYS)
 
     # Nice helper to add in the 'running' users key (if they have one)
-    key_pth = os.path.expanduser('~/.ssh/id_rsa.pub')
+    key_pth = os.path.expanduser("~/.ssh/id_rsa.pub")
     if not os.path.isfile(key_pth):
-        key_pth = os.path.expanduser('~/.ssh/id_dsa.pub')
+        key_pth = os.path.expanduser("~/.ssh/id_dsa.pub")
 
     if os.path.isfile(key_pth):
-        with open(key_pth, 'rb') as fh:
+        with open(key_pth, "rb") as fh:
             contents = fh.read()
-        keys[os.getlogin()] = [contents, '']
+        keys[os.getlogin()] = [contents, ""]
 
     return keys
 
@@ -193,7 +195,6 @@ class HTTPServerV6(HTTPServer):
 
 
 class MetaDataHandler(object):
-
     def __init__(self, opts):
         self.opts = opts
         self.instances = {}
@@ -206,17 +207,17 @@ class MetaDataHandler(object):
             return "\n".join(caps)
         action = params[0]
         action = action.lower()
-        if action == 'instance-id':
-            return 'i-%s' % (id_generator(lower=True))
-        elif action == 'ami-launch-index':
+        if action == "instance-id":
+            return "i-%s" % (id_generator(lower=True))
+        elif action == "ami-launch-index":
             return "%s" % random.choice([0, 1, 2, 3])
-        elif action == 'aki-id':
-            return 'aki-%s' % (id_generator(lower=True))
-        elif action == 'ami-id':
-            return 'ami-%s' % (id_generator(lower=True))
-        elif action == 'ari-id':
-            return 'ari-%s' % (id_generator(lower=True))
-        elif action == 'block-device-mapping':
+        elif action == "aki-id":
+            return "aki-%s" % (id_generator(lower=True))
+        elif action == "ami-id":
+            return "ami-%s" % (id_generator(lower=True))
+        elif action == "ari-id":
+            return "ari-%s" % (id_generator(lower=True))
+        elif action == "block-device-mapping":
             nparams = params[1:]
             if not nparams:
                 return "\n".join(BLOCK_DEVS)
@@ -226,23 +227,23 @@ class MetaDataHandler(object):
                     return "\n".join(sorted(list(DEV_MAPPINGS.keys())))
                 else:
                     return str(subvalue)
-        elif action in ['hostname', 'local-hostname', 'public-hostname']:
+        elif action in ["hostname", "local-hostname", "public-hostname"]:
             # Just echo back there own hostname that they called in on..
             return "%s" % (who)
-        elif action == 'instance-type':
+        elif action == "instance-type":
             return random.choice(INSTANCE_TYPES)
-        elif action == 'ami-manifest-path':
-            return 'my-amis/spamd-image.manifest.xml'
-        elif action == 'security-groups':
-            return 'default'
-        elif action in ['local-ipv4', 'public-ipv4']:
+        elif action == "ami-manifest-path":
+            return "my-amis/spamd-image.manifest.xml"
+        elif action == "security-groups":
+            return "default"
+        elif action in ["local-ipv4", "public-ipv4"]:
             # Just echo back there own ip that they called in on...
-            return "%s" % (kwargs.get('client_ip', '10.0.0.1'))
-        elif action == 'reservation-id':
+            return "%s" % (kwargs.get("client_ip", "10.0.0.1"))
+        elif action == "reservation-id":
             return "r-%s" % (id_generator(lower=True))
-        elif action == 'product-codes':
+        elif action == "product-codes":
             return "%s" % (id_generator(size=8))
-        elif action == 'public-keys':
+        elif action == "public-keys":
             nparams = params[1:]
             # This is a weird kludge, why amazon why!!!
             # public-keys is messed up, list of /latest/meta-data/public-keys/
@@ -267,51 +268,55 @@ class MetaDataHandler(object):
                         hclient.NOT_FOUND, "Unknown key id %r" % mybe_key
                     ) from e
                 # Extract the possible sub-params
-                result = traverse(nparams[1:], {
-                    "openssh-key": "\n".join(avail_keys[key_name]),
-                })
+                result = traverse(
+                    nparams[1:],
+                    {
+                        "openssh-key": "\n".join(avail_keys[key_name]),
+                    },
+                )
                 if isinstance(result, (dict)):
                     # TODO(harlowja): This might not be right??
                     result = "\n".join(sorted(result.keys()))
                 if not result:
-                    result = ''
+                    result = ""
                 return result
             else:
                 contents = []
                 for (i, key_id) in enumerate(key_ids):
                     contents.append("%s=%s" % (i, key_id))
                 return "\n".join(contents)
-        elif action == 'placement':
+        elif action == "placement":
             nparams = params[1:]
             if not nparams:
                 pcaps = sorted(PLACEMENT_CAPABILITIES.keys())
                 return "\n".join(pcaps)
             else:
                 pentry = nparams[0].strip().lower()
-                if pentry == 'availability-zone':
+                if pentry == "availability-zone":
                     zones = PLACEMENT_CAPABILITIES[pentry]
                     return "%s" % random.choice(zones)
                 else:
-                    return "%s" % (PLACEMENT_CAPABILITIES.get(pentry, ''))
+                    return "%s" % (PLACEMENT_CAPABILITIES.get(pentry, ""))
         else:
-            log.warning(("Did not implement action %s, "
-                         "returning empty response: %r"),
-                        action, NOT_IMPL_RESPONSE)
+            log.warning(
+                "Did not implement action %s, returning empty response: %r",
+                action,
+                NOT_IMPL_RESPONSE,
+            )
             return NOT_IMPL_RESPONSE
 
 
 class UserDataHandler(object):
-
     def __init__(self, opts):
         self.opts = opts
 
     def _get_user_blob(self, **kwargs):
         blob = None
-        if self.opts['user_data_file'] is not None:
-            blob = self.opts['user_data_file']
+        if self.opts["user_data_file"] is not None:
+            blob = self.opts["user_data_file"]
         if not blob:
             blob_mp = {
-                'hostname': kwargs.get('who', 'localhost'),
+                "hostname": kwargs.get("who", "localhost"),
             }
             lines = [
                 "#cloud-config",
@@ -334,9 +339,8 @@ user_fetcher = None
 
 
 class Ec2Handler(BaseHTTPRequestHandler):
-
     def _get_versions(self):
-        versions = ['latest'] + EC2_VERSIONS
+        versions = ["latest"] + EC2_VERSIONS
         versions = sorted(versions)
         return "\n".join(versions)
 
@@ -347,33 +351,35 @@ class Ec2Handler(BaseHTTPRequestHandler):
     def _find_method(self, path):
         # Puke! (globals)
         func_mapping = {
-            'user-data': user_fetcher.get_data,
-            'meta-data': meta_fetcher.get_data,
+            "user-data": user_fetcher.get_data,
+            "meta-data": meta_fetcher.get_data,
         }
-        segments = [piece for piece in path.split('/') if len(piece)]
+        segments = [piece for piece in path.split("/") if len(piece)]
         log.info("Received segments %s", segments)
         if not segments:
             return self._get_versions
         date = segments[0].strip().lower()
         if date not in self._get_versions():
-            raise WebException(hclient.BAD_REQUEST,
-                               "Unknown version format %r" % date)
+            raise WebException(
+                hclient.BAD_REQUEST, "Unknown version format %r" % date
+            )
         if len(segments) < 2:
             raise WebException(hclient.BAD_REQUEST, "No action provided")
         look_name = segments[1].lower()
         if look_name not in func_mapping:
-            raise WebException(hclient.BAD_REQUEST,
-                               "Unknown requested data %r" % look_name)
+            raise WebException(
+                hclient.BAD_REQUEST, "Unknown requested data %r" % look_name
+            )
         base_func = func_mapping[look_name]
         who = self.address_string()
         ip_from = self.client_address[0]
         if who == ip_from:
             # Nothing resolved, so just use 'localhost'
-            who = 'localhost'
+            who = "localhost"
         kwargs = {
-            'params': list(segments[2:]),
-            'who': who,
-            'client_ip': ip_from,
+            "params": list(segments[2:]),
+            "who": who,
+            "client_ip": ip_from,
         }
         return functools.partial(base_func, **kwargs)
 
@@ -384,12 +390,13 @@ class Ec2Handler(BaseHTTPRequestHandler):
             func = self._find_method(self.path)
             data = func()
             if not data:
-                data = ''
+                data = ""
             self.send_response(hclient.OK)
             self.send_header("Content-Type", "binary/octet-stream")
             self.send_header("Content-Length", len(data))
-            log.info("Sending data (len=%s):\n%s", len(data),
-                     format_text(data))
+            log.info(
+                "Sending data (len=%s):\n%s", len(data), format_text(data)
+            )
             self.end_headers()
             self.wfile.write(data.encode())
         except RuntimeError as e:
@@ -407,7 +414,7 @@ class Ec2Handler(BaseHTTPRequestHandler):
         self._do_response()
 
 
-def setup_logging(log_level, fmt='%(levelname)s: @%(name)s : %(message)s'):
+def setup_logging(log_level, fmt="%(levelname)s: @%(name)s : %(message)s"):
     root_logger = logging.getLogger()
     console_logger = logging.StreamHandler(sys.stdout)
     console_logger.setFormatter(logging.Formatter(fmt))
@@ -417,27 +424,47 @@ def setup_logging(log_level, fmt='%(levelname)s: @%(name)s : %(message)s'):
 
 def extract_opts():
     parser = argparse.ArgumentParser()
-    parser.add_argument("-p", "--port", dest="port", action="store", type=int,
-                        default=80, metavar="PORT",
-                        help=("port from which to serve traffic"
-                              " (default: %default)"))
-    parser.add_argument("-a", "--addr", dest="address", action="store",
-                        type=str, default='::', metavar="ADDRESS",
-                        help=("address from which to serve traffic"
-                              " (default: %default)"))
-    parser.add_argument("-f", '--user-data-file', dest='user_data_file',
-                        action='store', metavar='FILE',
-                        help=("user data filename to serve back to"
-                              "incoming requests"))
-    parser.add_argument('extra', nargs='*')
+    parser.add_argument(
+        "-p",
+        "--port",
+        dest="port",
+        action="store",
+        type=int,
+        default=80,
+        metavar="PORT",
+        help="port from which to serve traffic (default: %default)",
+    )
+    parser.add_argument(
+        "-a",
+        "--addr",
+        dest="address",
+        action="store",
+        type=str,
+        default="::",
+        metavar="ADDRESS",
+        help="address from which to serve traffic (default: %default)",
+    )
+    parser.add_argument(
+        "-f",
+        "--user-data-file",
+        dest="user_data_file",
+        action="store",
+        metavar="FILE",
+        help="user data filename to serve back toincoming requests",
+    )
+    parser.add_argument("extra", nargs="*")
     args = parser.parse_args()
-    out = {'port': args.port, 'address': args.address, 'extra': args.extra,
-           'user_data_file': None}
+    out = {
+        "port": args.port,
+        "address": args.address,
+        "extra": args.extra,
+        "user_data_file": None,
+    }
     if args.user_data_file:
         if not os.path.isfile(args.user_data_file):
             parser.error("Option -f specified a non-existent file")
-        with open(args.user_data_file, 'rb') as fh:
-            out['user_data_file'] = fh.read()
+        with open(args.user_data_file, "rb") as fh:
+            out["user_data_file"] = fh.read()
     return out
 
 
@@ -455,14 +482,14 @@ def run_server():
     setup_logging(logging.DEBUG)
     setup_fetchers(opts)
     log.info("CLI opts: %s", opts)
-    server_address = (opts['address'], opts['port'])
+    server_address = (opts["address"], opts["port"])
     server = HTTPServerV6(server_address, Ec2Handler)
     sa = server.socket.getsockname()
     log.info("Serving ec2 metadata on %s using port %s ...", sa[0], sa[1])
     server.serve_forever()
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     run_server()
 
 # vi: ts=4 expandtab
diff --git a/tools/validate-yaml.py b/tools/validate-yaml.py
index d8bbcfcb..b5d77a97 100755
--- a/tools/validate-yaml.py
+++ b/tools/validate-yaml.py
@@ -12,8 +12,8 @@ if __name__ == "__main__":
     for fn in sys.argv[1:]:
         sys.stdout.write("%s" % (fn))
         try:
-            fh = open(fn, 'rb')
-            yaml.safe_load(fh.read().decode('utf-8'))
+            fh = open(fn, "rb")
+            yaml.safe_load(fh.read().decode("utf-8"))
             fh.close()
             sys.stdout.write(" - ok\n")
         except Exception as e:
diff --git a/tox.ini b/tox.ini
index ff888266..034ee9a4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py3, xenial-dev, flake8, pylint
+envlist = py3, xenial-dev, flake8, pylint, black, isort
 recreate = True
 
 [testenv]
@@ -29,6 +29,27 @@ deps =
     -r{toxinidir}/integration-requirements.txt
 commands = {envpython} -m pylint {posargs:cloudinit tests tools}
 
+[testenv:black]
+basepython = python3
+deps =
+    # requirements
+    black==21.12b0
+commands = {envpython} -m black . --check
+
+[testenv:isort]
+basepython = python3
+deps =
+    isort==5.10.1
+commands = {envpython} -m isort . --check-only
+
+[testenv:format]
+basepython = python3
+deps =
+    black==21.12b0
+    isort==5.10.1
+commands =
+    {envpython} -m isort .
+    {envpython} -m black .
 
 [testenv:py3]
 basepython = python3
@@ -44,10 +65,9 @@ basepython = python2.7
 deps = -r{toxinidir}/test-requirements.txt
 
 [flake8]
-# E226: missing whitespace around arithmetic operator
+# E203: whitespace before ':', doesn't adhere to pep8 or black formatting
 # W503: line break before binary operator
-# W504: line break after binary operator
-ignore=E226,W503,W504
+ignore=E203,W503
 exclude = .venv,.tox,dist,doc,*egg,.git,build,tools
 per-file-ignores =
     cloudinit/cmd/main.py:E402
-- 
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