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[Launchpad Bug Tracker <1623868@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init -
0.7.8-1-g3705bb5-0ubuntu1~16.04.1

---------------
cloud-init (0.7.8-1-g3705bb5-0ubuntu1~16.04.1) xenial-proposed; urgency=medium

  * New upstream release 0.7.8.
  * New upstream snapshot.
    - systemd: put cloud-init.target After multi-user.target (LP: #1623868)

cloud-init (0.7.7-31-g65ace7b-0ubuntu1~16.04.2) xenial-proposed;
urgency=medium

  * debian/control: add Breaks of older versions of walinuxagent (LP:
#1623570)

cloud-init (0.7.7-31-g65ace7b-0ubuntu1~16.04.1) xenial-proposed;
urgency=medium

  * debian/control: fix missing dependency on python3-serial,
    and make SmartOS datasource work.
  * debian/cloud-init.templates fix capitalisation in template so
    dpkg-reconfigure works to select OpenStack. (LP: #1575727)
  * d/README.source, d/control, d/new-upstream-snapshot, d/rules: sync
    with yakkety for changes due to move to git.
  * d/rules: change PYVER=python3 to PYVER=3 to adjust to upstream change.
  * debian/rules, debian/cloud-init.install: remove install file
    to ensure expected files are collected into cloud-init deb.
    (LP: #1615745)
  * debian/dirs: remove obsolete / unused file.
  * upstream move from bzr to git.
  * New upstream snapshot.
    - Allow link type of null in network_data.json [Jon Grimm] (LP: #1621968)
    - DataSourceOVF: fix user-data as base64 with python3 (LP: #1619394)
    - remove obsolete .bzrignore
    - systemd: Better support package and upgrade. (LP: #1576692, #1621336)
    - tests: cleanup tempdirs in apt_source tests
    - apt config conversion: treat empty string as not provided. (LP: #1621180)
    - Fix typo in default keys for phone_home [Roland Sommer] (LP: #1607810)
    - salt minion: update default pki directory for newer salt minion.
      (LP: #1609899)
    - bddeb: add --release flag to specify the release in changelog.
    - apt-config: allow both old and new format to be present.
      [Christian Ehrhardt] (LP: #1616831)
    - python2.6: fix dict comprehension usage in _lsb_release. [Joshua Harlow]
    - Add a module that can configure spacewalk. [Joshua Harlow]
    - add install option for openrc [Matthew Thode]
    - Generate a dummy bond name for OpenStack (LP: #1605749)
    - network: fix get_interface_mac for bond slave, read_sys_net for ENOTDIR
    - azure dhclient-hook cleanups
    - Minor cleanups to atomic_helper and add unit tests.
    - Fix Gentoo net config generation [Matthew Thode]
    - distros: fix get_primary_arch method use of os.uname [Andrew Jorgensen]
    - Apt: add new apt configuration format [Christian Ehrhardt]
    - Get Azure endpoint server from DHCP client [Brent Baude]
    - DigitalOcean: use the v1.json endpoint [Ben Howard]
    - MAAS: add vendor-data support (LP: #1612313)
    - Upgrade to a configobj package new enough to work [Joshua Harlow]
    - ConfigDrive: recognize 'tap' as a link type. (LP: #1610784)
    - NoCloud: fix bug providing network-interfaces via meta-data.
      (LP: 1577982)
    - Add distro tags on config modules that should have it [Joshua Harlow]
    - ChangeLog: update changelog for previous commit.
    - add ntp config module [Ryan Harper]
    - SmartOS: more improvements for network configuration
    - tools/read-version: update to address change in version
    - make-tarball: older versions of git with --format=tar.
    - read-version: do not attempt git-describe if no git.
    - Newer requests have strong type validation [Joshua Harlow]
    - For upstream snapshot versions do not modify git-describe output.
    - adjust signal_handler for version changes.
    - revert unintended change to ubuntu sources list
    - drop modification of version during make-tarball, tools changes.
    - adjust tools and version information.
    - Update build tools to work with git [Lars Kellogg-Stedman]
    - fix pep8 errors in mcollective unit tests
    - mcollective: add tests, cleanups and bug fix when no config in /etc.

 -- Scott Moser <smoser@xxxxxxxxxx>  Thu, 15 Sep 2016 09:57:27 -0400

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

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https://bugs.launchpad.net/bugs/1623868

Title:
  cloud-final.service does not run due to dependency cycle

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]
  As part of the change in bug 1576692, we made cloud-final.target
  run After multi-user.target.  That created a dependency loop between
  cloud-init.target and multi-user.target and cloud-final.target.

  Most of the time systemd would break that loop by dropping
  cloud-init.target.  But sometimes, it would break the loop by dropping
  cloud-final.target, which would mean that user scripts do not run
  and generally cloud-init doesn't finish.

  [Test Case]
  ## Failure in a xenial image can only be reproduced by
  ## patching an image up to the previous xenial-proposed upload
  ## (0.7.7-31-g65ace7b-0ubuntu1~16.04.1), then cleaning it
  ## and then restarting.  We will focus on verifying there is not
  ## a problem.

  ## Launch an instance and patch it up to xenial-proposed
  $ release=xenial
  $ name=x1
  $ lxc launch ubuntu-daily:$release $name

  # wait for it to boot
  $ while ! lxc exec $name -- [ -e /run/cloud-init/result.json ]; do sleep 1; done

  ## Now update container, clean and reboot to show first boot
  $ lxc exec $name -- sh -c '
      p=/etc/apt/sources.list.d/proposed.list
      echo deb http://archive.ubuntu.com/ubuntu xenial-proposed main > "$p" &&
      apt-get update -q && apt-get -qy install cloud-init'
  $ lxc exec $name -- sh -c '
      cd /var/lib/cloud && for d in *; do [ "$d" = "seed" ] || rm -Rf "$d"; done
      rm -Rf /var/log/cloud-init*'

  ## This is like first boot now.
  $ lxc exec $name reboot
  $ while ! lxc exec $name -- [ -e /run/cloud-init/result.json ]; do sleep 1; done

  ## The services should show active
  $ lxc exec $name -- journalctl | grep Break || echo Good, no breaks
  $ lxc exec $name -- systemctl --no-pager status cloud-final.service
  $ lxc exec $name -- systemctl --no-pager status cloud-init.target

  [Regression Potential]
  Playing with boot order can cause problems.  Regression would be around
  some targets not running.   On a booted system this would show itself inx
    journalctl | grep -i Break
  or
    journalctl | grep -i ordering

  ==== End SRU Template ====

  With current yakkety cloud images (at least in Scalingstack), I often
  run into this dependency cycle at boot:

  Sep 15 09:28:51 ubuntu systemd[1]: cloud-init.target: Found ordering cycle on cloud-init.target/start
  Sep 15 09:28:51 ubuntu systemd[1]: cloud-init.target: Found dependency on cloud-final.service/start
  Sep 15 09:28:51 ubuntu systemd[1]: cloud-init.target: Found dependency on multi-user.target/start
  Sep 15 09:28:51 ubuntu systemd[1]: cloud-init.target: Found dependency on cloud-init.target/start
  Sep 15 09:28:51 ubuntu systemd[1]: cloud-init.target: Breaking ordering cycle by deleting job cloud-final.service/start
  Sep 15 09:28:51 ubuntu systemd[1]: cloud-final.service: Job cloud-final.service/start deleted to break ordering cycle starting with cloud-init.target/start

  ● cloud-final.service - Execute cloud user/final scripts
     Loaded: loaded (/lib/systemd/system/cloud-final.service; enabled; vendor preset: enabled)
     Active: inactive (dead)

  Thus /var/lib/cloud/instance/boot-finished never gets written and thus
  waiting for an instance to init just times out.

  This is with the most recent https://launchpad.net/ubuntu/+source
  /cloud-init/0.7.7-31-g65ace7b-0ubuntu1

  Related bugs:
   * bug 1576692: fully support package installation in systemd

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