schema and docs: Add jsonschema to resizefs and bootcmd modules

Add schema definitions to both cc_resizefs and cc_bootcmd modules. Extend
schema.py to parse and document enumerated json types. Schema definitions
are used to generate module documention and log warnings for schema
infractions.

This branch also does the following:
  - drops vestigial 'resize_rootfs_tmp' option from cc_resizefs. That
    option only created the specified directory and didn't make use of
that directory for any resize operations.
  - Drop yaml.dumps calls from schema documentation generation to avoid
    yaml import costs on module load
  - Add __doc__ = get_schema_doc(schema) definitions it each module to
    supplement python help() calls for cc_runcmd, cc_bootcmd, cc_ntp and
    cc_resizefs
  - Add a SCHEMA_EXAMPLES_SPACER_TEMPLATE string to docs for modules which
    contain more than one example

1 files changed, 12 insertions, 36 deletions

diff --git a/cloudinit/config/cc_ntp.py b/cloudinit/config/cc_ntp.py
index a02b4bf1..15ae1ecd 100644
--- a/cloudinit/config/cc_ntp.py
+++ b/cloudinit/config/cc_ntp.py
@@ -4,39 +4,10 @@
 #
 # This file is part of cloud-init. See LICENSE file for license information.
 
-"""
-NTP
----
-**Summary:** enable and configure ntp
-
-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 distro's ntp package, it will
-be copied to ``/etc/ntp.conf.dist`` 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``.
-
-**Internal name:** ``cc_ntp``
-
-**Module frequency:** per instance
-
-**Supported distros:** centos, debian, fedora, opensuse, ubuntu
-
-**Config keys**::
-
-    ntp:
-        pools:
-            - 0.company.pool.ntp.org
-            - 1.company.pool.ntp.org
-            - ntp.myorg.org
-        servers:
-            - my.ntp.server.local
-            - ntp.ubuntu.com
-            - 192.168.23.2
-"""
+"""NTP: enable and configure ntp"""
 
-from cloudinit.config.schema import validate_cloudconfig_schema
+from cloudinit.config.schema import (
+    get_schema_doc, validate_cloudconfig_schema)
 from cloudinit import log as logging
 from cloudinit.settings import PER_INSTANCE
 from cloudinit import templater
@@ -76,10 +47,13 @@ schema = {
         ``{0-3}.{distro}.pool.ntp.org``."""),
     'distros': distros,
     'examples': [
-        {'ntp': {'pools': ['0.company.pool.ntp.org', '1.company.pool.ntp.org',
-                           'ntp.myorg.org'],
-                 'servers': ['my.ntp.server.local', 'ntp.ubuntu.com',
-                             '192.168.23.2']}}],
+        dedent("""\
+        ntp:
+          pools: [0.int.pool.ntp.org, 1.int.pool.ntp.org, ntp.myorg.org]
+          servers:
+            - ntp.server.local
+            - ntp.ubuntu.com
+            - 192.168.23.2""")],
     'frequency': PER_INSTANCE,
     'type': 'object',
     'properties': {
@@ -117,6 +91,8 @@ schema = {
     }
 }
 
+__doc__ = get_schema_doc(schema)  # Supplement python help()
+
 
 def handle(name, cfg, cloud, log, _args):
     """Enable and configure ntp."""