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authorChad Smith <chad.smith@canonical.com>2018-10-26 03:49:57 +0000
committerServer Team CI Bot <josh.powers+server-team-bot@canonical.com>2018-10-26 03:49:57 +0000
commitdc0be9c56f78537f1808934d26f5aa0868ae7842 (patch)
tree53caf37637bf79f5c93683bfe87ec85008b9bc1b /cloudinit
parent532ff0f0a4f12225d5785bc98d7a4528e0c779d6 (diff)
downloadvyos-cloud-init-dc0be9c56f78537f1808934d26f5aa0868ae7842.tar.gz
vyos-cloud-init-dc0be9c56f78537f1808934d26f5aa0868ae7842.zip
instance-data: fallback to instance-data.json if sensitive is absent.
On cloud-init upgrade path from 18.3 to 18.4 cloud-init changed how instance-data is written. Cloud-init changes instance-data.json from root read-only to redacted world-readable content, and provided a separate unredacted instance-data-sensitive.json which is read-only root. Since instance-data is only rewritten from cache on reboot, the query and render tools needed fallback to use the 'old' instance-data.json if the new sensitive file isn't yet present. This avoids error messages from tools about an absebt /run/instance-data-sensitive.json file. LP: #1798189
Diffstat (limited to 'cloudinit')
-rwxr-xr-xcloudinit/cmd/devel/render.py23
-rw-r--r--cloudinit/cmd/devel/tests/test_render.py45
-rw-r--r--cloudinit/cmd/query.py28
-rw-r--r--cloudinit/cmd/tests/test_query.py49
4 files changed, 126 insertions, 19 deletions
diff --git a/cloudinit/cmd/devel/render.py b/cloudinit/cmd/devel/render.py
index 2ba6b681..4d3ec958 100755
--- a/cloudinit/cmd/devel/render.py
+++ b/cloudinit/cmd/devel/render.py
@@ -8,11 +8,10 @@ import sys
from cloudinit.handlers.jinja_template import render_jinja_payload_from_file
from cloudinit import log
-from cloudinit.sources import INSTANCE_JSON_FILE
+from cloudinit.sources import INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE
from . import addLogHandlerCLI, read_cfg_paths
NAME = 'render'
-DEFAULT_INSTANCE_DATA = '/run/cloud-init/instance-data.json'
LOG = log.getLogger(NAME)
@@ -47,12 +46,22 @@ def handle_args(name, args):
@return 0 on success, 1 on failure.
"""
addLogHandlerCLI(LOG, log.DEBUG if args.debug else log.WARNING)
- if not args.instance_data:
- paths = read_cfg_paths()
- instance_data_fn = os.path.join(
- paths.run_dir, INSTANCE_JSON_FILE)
- else:
+ if args.instance_data:
instance_data_fn = args.instance_data
+ else:
+ paths = read_cfg_paths()
+ uid = os.getuid()
+ 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)
+ if not os.path.exists(instance_data_fn):
+ LOG.warning(
+ '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)
return 1
diff --git a/cloudinit/cmd/devel/tests/test_render.py b/cloudinit/cmd/devel/tests/test_render.py
index fc5d2c0d..988bba03 100644
--- a/cloudinit/cmd/devel/tests/test_render.py
+++ b/cloudinit/cmd/devel/tests/test_render.py
@@ -6,7 +6,7 @@ import os
from collections import namedtuple
from cloudinit.cmd.devel import render
from cloudinit.helpers import Paths
-from cloudinit.sources import INSTANCE_JSON_FILE
+from cloudinit.sources import INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE
from cloudinit.tests.helpers import CiTestCase, mock, skipUnlessJinja
from cloudinit.util import ensure_dir, write_file
@@ -63,6 +63,49 @@ class TestRender(CiTestCase):
'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)
+ ensure_dir(run_dir)
+ 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:
+ m_getuid.return_value = 0
+ 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())
+ self.assertIn(
+ '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)
+ 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')
+ 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:
+ m_getuid.return_value = 0
+ 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."""
diff --git a/cloudinit/cmd/query.py b/cloudinit/cmd/query.py
index 7d2d4fe4..ff03de94 100644
--- a/cloudinit/cmd/query.py
+++ b/cloudinit/cmd/query.py
@@ -79,22 +79,30 @@ def handle_args(name, args):
uid = os.getuid()
if not all([args.instance_data, args.user_data, args.vendor_data]):
paths = read_cfg_paths()
- if not args.instance_data:
+ if args.instance_data:
+ instance_data_fn = args.instance_data
+ else:
+ redacted_data_fn = os.path.join(paths.run_dir, INSTANCE_JSON_FILE)
if uid == 0:
- default_json_fn = INSTANCE_JSON_SENSITIVE_FILE
+ sensitive_data_fn = os.path.join(
+ 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)
+ instance_data_fn = redacted_data_fn
else:
- default_json_fn = INSTANCE_JSON_FILE # World readable
- instance_data_fn = os.path.join(paths.run_dir, default_json_fn)
+ instance_data_fn = redacted_data_fn
+ if args.user_data:
+ user_data_fn = args.user_data
else:
- instance_data_fn = args.instance_data
- if not args.user_data:
user_data_fn = os.path.join(paths.instance_link, 'user-data.txt')
+ if args.vendor_data:
+ vendor_data_fn = args.vendor_data
else:
- user_data_fn = args.user_data
- if not args.vendor_data:
vendor_data_fn = os.path.join(paths.instance_link, 'vendor-data.txt')
- else:
- vendor_data_fn = args.vendor_data
try:
instance_json = util.load_file(instance_data_fn)
diff --git a/cloudinit/cmd/tests/test_query.py b/cloudinit/cmd/tests/test_query.py
index fb87c6ab..241f5413 100644
--- a/cloudinit/cmd/tests/test_query.py
+++ b/cloudinit/cmd/tests/test_query.py
@@ -7,7 +7,8 @@ import os
from collections import namedtuple
from cloudinit.cmd import query
from cloudinit.helpers import Paths
-from cloudinit.sources import REDACT_SENSITIVE_VALUE, INSTANCE_JSON_FILE
+from cloudinit.sources import (
+ REDACT_SENSITIVE_VALUE, INSTANCE_JSON_FILE, INSTANCE_JSON_SENSITIVE_FILE)
from cloudinit.tests.helpers import CiTestCase, mock
from cloudinit.util import ensure_dir, write_file
@@ -76,6 +77,52 @@ class TestQuery(CiTestCase):
'ERROR: Missing instance-data.json file: %s' % json_file,
m_stderr.getvalue())
+ def test_handle_args_root_fallsback_to_instance_data(self):
+ """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)
+ 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.query.read_cfg_paths', 'm_paths')
+ self.m_paths.return_value = paths
+ with mock.patch('sys.stderr', new_callable=StringIO) as m_stderr:
+ with mock.patch('os.getuid') as m_getuid:
+ m_getuid.return_value = 0
+ self.assertEqual(1, query.handle_args('anyname', args))
+ json_file = os.path.join(run_dir, INSTANCE_JSON_FILE)
+ sensitive_file = os.path.join(run_dir, INSTANCE_JSON_SENSITIVE_FILE)
+ self.assertIn(
+ 'WARNING: Missing root-readable %s. Using redacted %s instead.' % (
+ sensitive_file, json_file),
+ m_stderr.getvalue())
+
+ def test_handle_args_root_uses_instance_sensitive_data(self):
+ """When no instance_data argument, root uses semsitive json."""
+ user_data = self.tmp_path('user-data', dir=self.tmp)
+ vendor_data = self.tmp_path('vendor-data', dir=self.tmp)
+ write_file(user_data, 'ud')
+ write_file(vendor_data, 'vd')
+ run_dir = self.tmp_path('run_dir', dir=self.tmp)
+ sensitive_file = os.path.join(run_dir, INSTANCE_JSON_SENSITIVE_FILE)
+ write_file(sensitive_file, '{"my-var": "it worked"}')
+ ensure_dir(run_dir)
+ paths = Paths({'run_dir': run_dir})
+ self.add_patch('cloudinit.cmd.query.read_cfg_paths', 'm_paths')
+ self.m_paths.return_value = paths
+ args = self.args(
+ debug=False, dump_all=True, format=None, instance_data=None,
+ list_keys=False, user_data=vendor_data, vendor_data=vendor_data,
+ varname=None)
+ 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, query.handle_args('anyname', args))
+ self.assertEqual(
+ '{\n "my_var": "it worked",\n "userdata": "vd",\n '
+ '"vendordata": "vd"\n}\n', m_stdout.getvalue())
+
def test_handle_args_dumps_all_instance_data(self):
"""When --all is specified query will dump all instance data vars."""
write_file(self.instance_data, '{"my-var": "it worked"}')