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[Launchpad Bug Tracker <1442228@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package upstart - 1.13.2-0ubuntu13

---------------
upstart (1.13.2-0ubuntu13) vivid; urgency=medium

  * remove running-in-container - it is moved to init-system-helpers and
    made to work also with systemd.  (LP: #1442228)
 -- Serge Hallyn <serge.hallyn@xxxxxxxxxx>   Thu, 09 Apr 2015 18:40:12 -0500

** Changed in: upstart (Ubuntu)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1442228

Title:
  lxc fails to start inside vivid container

Status in init-system-helpers package in Ubuntu:
  Triaged
Status in lxc package in Ubuntu:
  Triaged
Status in upstart package in Ubuntu:
  Fix Released

Bug description:
  When installing lxc, the lxc.postinst tries to install apparmor profiles.
  Inside a vivid container on an upstart-based host, the profile loading
  script will test /bin//running-in-container and see that it is in a container
  and exit 0.  On a systemd host, /bin/running-in-container doesn't work, so
  the profile loading script exits with error, failing the postinst.

  /bin/running-in-container needs to be generalized to work with
  systemd.

  Unlike upstart, systemd leaves its environment showing in /proc/1/environ,
  so we can in fact simply check for "grep -q container=lxc /proc/1/environ",
  which we couldn't do with upstart.  However, to keep things more similar
  between upstart and systemd, and to handle all cases, it would probably be
  best to have a systemd unit starting at boot which does the same thing as
  the /etc/init/container-detect.conf does.

  Then move /bin/running-in-container from upstart into init-system-
  helpers.

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