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[Launchpad Bug Tracker <1693361@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package cloud-init - 0.7.9-197-gebc9ecbc-
0ubuntu1

---------------
cloud-init (0.7.9-197-gebc9ecbc-0ubuntu1) artful; urgency=medium

  * debian/control: add build dependency python3-jsonschema (LP: #1695318)
  * New upstream snapshot.
    - Azure: Add network-config, Refactor net layer to handle duplicate macs.
      [Ryan Harper]
    - Tests: Simplify the check on ssh-import-id [Joshua Powers]
    - tests: update ntp tests after sntp added [Joshua Powers]
    - FreeBSD: Make freebsd a variant, fix unittests and
      tools/build-on-freebsd.
    - FreeBSD: fix test failure
    - FreeBSD: replace ifdown/ifup with "ifconfig down" and "ifconfig up".
      [Hongjiang Zhang] (LP: #1697815)
    - FreeBSD: fix cdrom mounting failure if /mnt/cdrom/secure did not exist.
      [Hongjiang Zhang] (LP: #1696295)
    - main: Don't use templater to format the welcome message
      [Andrew Jorgensen]
    - docs: Automatically generate module docs form schema if present.
      [Chad Smith]
    - debian: fix path comment in /etc/hosts template.
      [Jens Sandmann] (LP: #1606406)
    - suse: add hostname and fully qualified domain to template.
      [Jens Sandmann]
    - write_file(s): Print permissions as octal, not decimal [Andrew Jorgensen]
    - ci deps: Add --test-distro to read-dependencies to install all deps
      [Chad Smith]
    - tools/run-centos: cleanups and move to using read-dependencies
    - pkg build ci: Add make ci-deps-<distro> target to install pkgs
      [Chad Smith]
    - systemd: make cloud-final.service run before apt daily services.
      (LP: #1693361)
    - selinux: Allow restorecon to be non-fatal. [Ryan Harper] (LP: #1686751)
    - net: Allow netinfo subprocesses to return 0 or 1.
      [Ryan Harper] (LP: #1686751)
    - net: Allow for NetworkManager configuration [Ryan McCabe] (LP: #1693251)
    - Use distro release version to determine if we use systemd in redhat spec
      [Ryan Harper]
    - net: normalize data in network_state object
    - Integration Testing: tox env, pyxld 2.2.3, and revamp framework
      [Wesley Wiedenmeier]
    - Chef: Update omnibus url to chef.io, minor doc changes. [JJ Asghar]
    - tools: add centos scripts to build and test [Joshua Powers]
    - Drop cheetah python module as it is not needed by trunk [Ryan Harper]
    - rhel/centos spec cleanups.
    - cloud.cfg: move to a template.  setup.py changes along the way.
    - Makefile: add deb-src and srpm targets. use PYVER more places.
    - makefile: fix python 2/3 detection in the Makefile [Chad Smith]
    - snap: Removing snapcraft plug line [Joshua Powers] (LP: #1695333)
    - RHEL/CentOS: Fix default routes for IPv4/IPv6 configuration.
      [Andreas Karis] (LP: #1696176)
    - test: Fix pyflakes complaint of unused import.
      [Joshua Powers] (LP: #1695918)
    - NoCloud: support seed of nocloud from smbios information
      [Vladimir Pouzanov] (LP: #1691772)
    - net: when selecting a network device, use natural sort order
      [Marc-Aurèle Brothier]
    - fix typos and remove whitespace in various docs [Stephan Telling]
    - systemd: Fix typo in comment in cloud-init.target. [Chen-Han Hsiao]
    - Tests: Skip jsonschema related unit tests when dependency is absent.
      [Chad Smith] (LP: #1695318)
    - azure: remove accidental duplicate line in merge.
    - azure: identify platform by well known value in chassis asset tag.
      [Chad Smith] (LP: #1693939)
    - tools/net-convert.py: support old cloudinit versions by using kwargs.
    - ntp: Add schema definition and passive schema validation.
      [Chad Smith] (LP: #1692916)
    - Fix eni rendering for bridge params that require repeated key for values.
      [Ryan Harper]
    - net: remove systemd link file writing from eni renderer [Ryan Harper]
    - AliYun: Enable platform identification and enable by default.
      [Junjie Wang] (LP: #1638931)

 -- Scott Moser <smoser@xxxxxxxxxx>  Tue, 27 Jun 2017 17:18:24 -0400

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

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https://bugs.launchpad.net/bugs/1693361

Title:
  cloud-init sometimes fails on dpkg lock due to concurrent apt-
  daily.service execution

Status in APT:
  Confirmed
Status in cloud-init:
  Confirmed
Status in apt package in Ubuntu:
  New
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
Status in cloud-init source package in Zesty:
  Confirmed
Status in cloud-init source package in Artful:
  Fix Released

Bug description:
  apt-daily is now a systemd service rather than being invoked by
  cron.daily.  If one builds a custom AMI it is possible that the apt-
  daily.timer will fire during boot.  This can fire at the same time
  cloud-init is running and if cloud-init loses the race the invocation
  of apt (e.g. use of "packages:" in the config) will fail.

  There is a lot of discussion online about this change to apt-daily
  (e.g. unattended upgrades happening during business hours, delaying
  boot, etc.) and discussion of potential systemd changes regarding
  timers firing during boot (c.f.
  https://github.com/systemd/systemd/issues/5659).

  While it would be better to solve this in apt itself, I suggest that
  cloud-init be defensive when calling apt and implement some retry
  mechanism.

  Various instances of people running into this issue:

  https://github.com/chef/bento/issues/609
  https://clusterhq.atlassian.net/browse/FLOC-4486
  https://github.com/boxcutter/ubuntu/issues/73
  https://unix.stackexchange.com/questions/315502/how-to-disable-apt-daily-service-on-ubuntu-cloud-vm-image

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