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[Launchpad Bug Tracker <1689346@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init - 0.7.9-153-g16a7302f-
0ubuntu1~17.04.1

---------------
cloud-init (0.7.9-153-g16a7302f-0ubuntu1~17.04.1) zesty-proposed; urgency=medium

  * New upstream snapshot.
    - net: fix reading and rendering addresses in cidr format.
      [Dimitri John Ledkov] (LP: #1689346, #1684349)
    - disk_setup: udev settle before attempting partitioning or fs creation.
      (LP: #1692093)
    - GCE: Update the attribute used to find instance SSH keys.
      [Daniel Watkins] (LP: #1693582)
    - nplan: For bonds, allow dashed or underscore names of keys.
      [Dimitri John Ledkov] (LP: #1690480)
    - tests: python2.6: fix unit tests usage of assertNone and format.
    - tests: update docstring on test_configured_list_with_none
    - fix tools/ds-identify to not write None twice.
    - tox/build: do not package depend on style requirements.
    - tests: ntp: Restructure cc_ntp unit tests. [Chad Smith]
    - flake8: move the pinned version of flake8 up to 3.3.0
    - tests: Apply workaround for snapd bug in test case. [Joshua Powers]
    - RHEL/CentOS: Fix dual stack IPv4/IPv6 configuration.  [Andreas Karis]
    - disk_setup: fix several issues with gpt disk partitions. (LP: #1692087)
    - function spelling & docstring update [Joshua Powers]
    - tests: Fix unittest bug in ntp tests. [Joshua Powers]
    - tox: move pylint target to 1.7.1
    - Fix get_interfaces_by_mac for empty macs (LP: #1692028)
    - DigitalOcean: remove routes except for the public interface.
      [Ben Howard] (LP: #1681531.)
    - netplan: pass macaddress, when specified, for vlans
      [Dimitri John Ledkov] (LP: #1690388)
    - doc: various improvements for the docs on cc_users_groups.
      [Felix Dreissig]
    - cc_ntp: write template before installing and add service restart
      [Ryan Harper] (LP: #1645644)
    - tests: fix cloudstack unit tests to avoid accessing
      /var/lib/NetworkManager [Lars Kellogg-Stedman]
    - tests: fix hardcoded path to mkfs.ext4 [Joshua Powers] (LP: #1691517)
    - Actually skip warnings when .skip file is present.
      [Chris Brinker] (LP: #1691551)
    - netplan: fix netplan render_network_state signature.
      [Dimitri John Ledkov] (LP: #1685944)
    - Azure: fix reformatting of ephemeral disks on resize to large types.
      (LP: #1686514)
    - make deb: Add devscripts dependency for make deb.
      Cleanup packages/bddeb. [Chad Smith] (LP: #1685935)
    - openstack: fix log message copy/paste typo in _get_url_settings
      [Lars Kellogg-Stedman]
    - unittests: fix unittests run on centos [Joshua Powers]
    - Improve detection of snappy to include os-release and kernel cmdline.
      (LP: #1689944)
    - Add address to config entry generated by _klibc_to_config_entry.
      [Julien Castets] (LP: #1691135)
    - sysconfig: Raise ValueError when multiple default gateways are present.
      [Chad Smith] (LP: #1687485)
    - FreeBSD: improvements and fixes for use on Azure
      [Hongjiang Zhang] (LP: #1636345)
    - Add unit tests for ds-identify, fix Ec2 bug found.
    - fs_setup: if cmd is specified, use shell interpretation.
      [Paul Meyer] (LP: #1687712)
    - doc: document network configuration defaults policy and formats.
      [Ryan Harper]
    - doc: Fix name of "uri" key in docs for "cc_apt_configure" module
      [Felix Dreissig]
    - tests: Enable artful in integration tests [Joshua Powers]

 -- Scott Moser <smoser@xxxxxxxxxx>  Fri, 26 May 2017 16:14:09 -0400

** Changed in: cloud-init (Ubuntu Zesty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1689346

Title:
  cloud-init and nplan do not parse and use OpenStack networking
  correctly with netmask

Status in cloud-init:
  Fix Committed
Status in cloud-init package in Ubuntu:
  Fix Released
Status in cloud-init source package in Xenial:
  Fix Released
Status in cloud-init source package in Yakkety:
  Fix Released
Status in cloud-init source package in Zesty:
  Fix Released

Bug description:
  === Begin SRU Template ===
  [Impact]
  On Openstack instances, cloud-init incorrectly rendered netplan
  configuration files.  The result is that networking does not work
  as expected.

  Note that this is not a default configuration on any Ubuntu provided images.
  Default images use ifupdown (eni) rendering which did not have this issue.

  [Test Case]
  The basic idea below is:
   a.) launch an instance with proposed version of cloud-init.
   b.) inside instance, get cloud-init's network rendering tool from trunk
   c.) run the rendering tool against a config that failed before.
   d.) check rendered netplan config to verify it has the correct format.
       The failed output would have 'addresses' with a format like:
       172.19.1.34/255.255.255.0
       The expected output would be 'cidr' format:
       172.19.1.34/24

  ## launch an instance.
  $ release=xenial
  $ ref=$release-proposed
  $ lxc-proposed-snapshot --proposed --publish $release $ref
  $ lxc init $ref $name

  ## get render tool
  $ wget https://git.launchpad.net/~cloud-init-dev/cloud-init/plain/tools/net-convert.py -O net-convert.py

  ## write the network_data.json
  $ cat >network_data.json <<EOF
  {
   "links": [
    {"ethernet_mac_address": "aa:ab:ac:ad:ae:00",
     "id": "tap1a", "type": "phy", "vif_id": "1a81968a"}
   ],
   "networks": [
     {"id": "network0", "ip_address": "172.19.1.34", "link": "tap1a",
      "netmask": "255.255.255.0", "network_id": "dacd568d", "type": "ipv4",
      "routes": [
       {"gateway": "172.19.3.254", "netmask": "0.0.0.0",
        "network": "0.0.0.0"}]}
   ],
   "services": [{"address": "172.19.0.12", "type": "dns"}]
  }
  EOF

  ## run the converter
  $ ./net-convert.py --network-data=network_data.json \
       --kind=network_data.json --output-kind=netplan \
       -m eth1,aa:ab:ac:ad:ae:00 --directory=./out.d 

  
  ## check the output
  $ cat out.d/etc/netplan/50-cloud-init.yaml
  network:
      version: 2
      ethernets:
          eth1:
              addresses:
              - 172.19.1.34/24
              match:
                  macaddress: aa:ab:ac:ad:ae:00
              nameservers:
                  addresses:
                  - 172.19.0.12
              routes:
              -   to: 0.0.0.0/0
                  via: 172.19.3.254
              set-name: eth1

  ## show the cloud-init versions
  $ dpkg-query --show cloud-init
  ...

  [Regression Potential] 
  The change is fairly safe in that it basically renders:
    172.19.1.34/24
  instead of
    172.19.1.34/255.255.255.0

  The previous rendering just plain did not work as it is not valid
  input for netplan.  So the regression path there should be low.

  The common code changes could shake out other failures in the networking
  path.

  [Other Info]
  Upstream commit at
    https://git.launchpad.net/cloud-init/commit/?id=16a7302f6a

  lxc-proposed-snapshot is
    https://git.launchpad.net/~smoser/cloud-init/+git/sru-info/tree/bin/lxc-proposed-snapshot
  It publishes an image to lxd with proposed enabled and cloud-init upgraded.
  === End SRU Template ===

  
  networking data josn has:

  "ip_address" : "104.130.20.155",
  "netmask" : "255.255.255.0"

  "ip_address" : "10.184.3.234",
  "netmask" : "255.255.240.0",

  that got rendered into nplan as:
   - 104.130.20.155/255.255.255.0
   - 10.184.3.234/255.255.240.0

  which it failed to parse

  Stderr: Error in network definition //etc/netplan/50-cloud-init.yaml
  line 32 column 12: invalid prefix length in address
  '104.130.20.155/255.255.255.0'

  I believe nplan is expecing CIDR notation of /24 or some such. I
  belive the current plan is to fix cloud-init to generate /24 cidr
  notation in the nplan renderer.

  This needs SRU into xenial.

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