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[Ubuntu Foundations Team Bug Bot <1476691@xxxxxxxxxxxxxxxxxx>]

** Tags added: patch

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https://bugs.launchpad.net/bugs/1476691

Title:
  Containers are stopped during lxc package upgrade

Status in lxc package in Ubuntu:
  Confirmed

Bug description:
  Starting in Ubuntu 15.04, while using systemd as init, running
  containers are being stopped when an lxc package upgrade occurs. In
  older Ubuntu releases, running containers are still up after lxc
  package upgrades.

  Serge reports that a simple `apt-get install --reinstall lxc` will
  reproduce this bug.

  Here's another reproducer where I did a no change rebuild of lxc
  1.1.2-0ubuntu3 as 1.1.2-0ubuntu4~nochange1:

  tyhicks@sec-vivid-amd64:~$ sudo lxc-ls -f
  NAME      STATE    IPV4        IPV6  GROUPS  AUTOSTART
  ------------------------------------------------------
  somename  RUNNING  10.0.3.135  -     -       NO
  tyhicks@sec-vivid-amd64:~$ sudo lxc-attach -n somename -- hostname
  somename
  tyhicks@sec-vivid-amd64:~$ sudo apt-get install lxc lxc-templates
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  The following extra packages will be installed:
    liblxc1 python3-lxc
  Suggested packages:
    btrfs-tools lvm2 lxctl qemu-user-static
  The following packages will be upgraded:
    liblxc1 lxc lxc-templates python3-lxc
  4 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
  Need to get 0 B/781 kB of archives.
  After this operation, 0 B of additional disk space will be used.
  Do you want to continue? [Y/n] y
  WARNING: The following packages cannot be authenticated!
    python3-lxc lxc-templates liblxc1 lxc
  Install these packages without verification? [y/N] y
  (Reading database ... 217273 files and directories currently installed.)
  Preparing to unpack .../python3-lxc_1.1.2-0ubuntu4~nochange1_amd64.deb ...
  Unpacking python3-lxc (1.1.2-0ubuntu4~nochange1) over (1.1.2-0ubuntu3) ...
  Preparing to unpack .../lxc-templates_1.1.2-0ubuntu4~nochange1_amd64.deb ...
  Unpacking lxc-templates (1.1.2-0ubuntu4~nochange1) over (1.1.2-0ubuntu3) ...
  Preparing to unpack .../liblxc1_1.1.2-0ubuntu4~nochange1_amd64.deb ...
  Unpacking liblxc1 (1.1.2-0ubuntu4~nochange1) over (1.1.2-0ubuntu3) ...
  Preparing to unpack .../lxc_1.1.2-0ubuntu4~nochange1_amd64.deb ...
  Unpacking lxc (1.1.2-0ubuntu4~nochange1) over (1.1.2-0ubuntu3) ...
  Processing triggers for man-db (2.7.0.2-5) ...
  Processing triggers for ureadahead (0.100.0-19) ...
  Setting up liblxc1 (1.1.2-0ubuntu4~nochange1) ...
  Setting up python3-lxc (1.1.2-0ubuntu4~nochange1) ...
  Setting up lxc (1.1.2-0ubuntu4~nochange1) ...
  Setting up lxc dnsmasq configuration.
  Setting up lxc-templates (1.1.2-0ubuntu4~nochange1) ...
  Processing triggers for libc-bin (2.21-0ubuntu4) ...
  tyhicks@sec-vivid-amd64:~$ sudo lxc-ls -f
  NAME      STATE    IPV4  IPV6  GROUPS  AUTOSTART
  ------------------------------------------------
  somename  STOPPED  -     -     -       NO
  tyhicks@sec-vivid-amd64:~$ sudo lxc-attach -n somename -- hostname
  lxc-attach: attach.c: lxc_attach: 632 failed to get the init pid

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