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[Scott Moser <smoser@xxxxxxxxxx>]

This is fixed in cloud-init 0.7.9.

** Changed in: cloud-init
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1354694

Title:
  useradd crashes if group list contains whitespace on Fedora

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

Bug description:
  === Begin SRU Template ===
  [Impact]
  A specific usage of user data to cloud-init will fail to add a user.

  This cloud-config:
    #cloud-config
    users:
      - default
      - name: foobar
        gecos: "My User"
        groups: sudo, adm

  Will fail with information in the cloud-init log showing:
  2016-12-19 21:39:32,713 - util.py[WARNING]: Failed to create group  adm
  2016-12-19 21:39:32,713 - util.py[DEBUG]: Failed to create group  adm
  Traceback (most recent call last):
  ...
  cloudinit.util.ProcessExecutionError: Unexpected error while running command.
  Command: ['groupadd', ' adm']
  Exit code: 3
  Reason: -
  Stdout: ''
  Stderr: "groupadd: ' adm' is not a valid group name\n"

  While changing the last line to the following would work:
        groups: [sudo, adm]

  [Test Case]
  $ cat > user-data <"EOF"
  #cloud-config
  users:
    - default
    - name: foobar
      gecos: "My User"
      groups: sudo, adm
    - name: wark
      groups: [sudo, adm]

  $ release=yakkety
  $ name="$release-1354694"

  $ lxc launch "ubuntu-daily:$release" "$name" \
       "--config=user.user-data=$(cat user-data)"

  $ sleep 10

  ## Check foobar is in expected groups
  $ lxc exec $name -- groups foobar
  foobar : foobar adm sudo

  $ lxc exec $name -- groups wark
  wark : wark adm sudo

  $ lxc exec $name -- grep WARN /var/log/cloud-init.log || echo "no warn"
  no warn

  [Regression Potential]
  There are 3 changes in this commit
  a.) if 'groups' entry is a string, split on "," and strip pieces
      The most likely path to failure here is if previously a non-string
      (possibly bytes) was being passed in and now will be ignored.
      That seems unlikely and clearly wrong input.

  b.) fix and unit tests to explicitly set system=False or no_create_home=True.
      Previously those paths did not test the value of the entry, only the
      presense of the entry.
      This meant that these 2 configs were the same:
        users: {name: bob, system: True}
      and
        users: {name: bob, system: False}

      That bug is fixed here so that 'system: False' is just explicitly
      disabling the '--system' flag to adduser.

  c.) debug message cleanup:

     LOG.debug("created group %s for user %s", name, group)
     LOG.debug("created group '%s' for user '%s'", group, name)

  [Other Info]
  Upstream commit at
    https://git.launchpad.net/cloud-init/commit/?id=ca3ae67211d907b4cfdcd685c0ae4f9530cb7da1

  === End SRU Template ===

  
  See downstream: https://bugzilla.redhat.com/show_bug.cgi?id=1126365

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