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[Scott Moser <smoser@xxxxxxxxxx>]

** Changed in: cloud-init (Ubuntu Xenial)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1623094

Title:
  cloud-init in xenial crashes on "null" vif type in network_data.json

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

Bug description:
  ==== Begin SRU Template ====
  [Impact]
  Instances of ubuntu launched on Rackspace public cloud would have broken networking and WARN messages in /var/log/cloud-init.log.

  With this new cloud-init in place, any vms launched with a config
  drive would not work properly.

  [Test Case]
  Show failure
   * create a vm on rackspace. using image ba8782e1-ec35-4bdc-b8f7-2f28e343094a
     openstack server create --config-drive=1 --key-name=brickies --flavor=2 --image=ba8782e1-ec35-4bdc-b8f7-2f28e343094a  my-xenial-cfgdrv

   * ssh will fail to system. go to rackspace cloud console, view the
  servers' console and log in as root via password provided.

  Now, to fix:
   * log into system on console
   * get the proposed package:
     echo "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc)-proposed main" | tee /etc/apt/sources.list.d/proposed.list
     apt-get update
     apt-get install cloud-init
     mkdir orig
     mv /var/lib/cloud /var/log/cloud-init* orig
   * reboot

  You should now be able to ssh into the system.

  [Regression Potential]
  Low regression potential, as this is a fix for a regression.
  It could potentially have fallout on other openstack cloud guests, but only in cases where there was already failure.
  ==== End SRU Template ====

  NOTE: this was originally reported in cpc-rax bug 1621968.  Re-
  reporting here for tracking purposes as requested.  Please see that
  issue for log files and more details.

  In recent versions of cloud-init[1], we've found that when we attach a
  configdrive to a cloud server cloud-init crashes before it has a
  chance to complete its tasks - most critically, generating the SSH
  keys.

  The root of this issue seems to be that cloud-init wants to parse the
  included network config on the configdrive.. Our network config uses a
  "null" vif type, which causes cloud-init to bomb out with an error
  like this:

  Sep 09 14:48:40 shtest2 cloud-init[2910]: ValueError: Unknown
  network_data link type: None

  [1]# dpkg -s cloud-init | grep ^Version
  Version: 0.7.7~bzr1256-0ubuntu1~16.04.1

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