[Bug 1384751] Re: checkpoint restore fails with /usr/lib/x86_64-linux-gnu/lxc/lxc-restore-net: not found

[Tycho Andersen]

** Description changed:

+ ================================================================
+ Impact: restoring containers from a checkpoint doesn't work
+ Development fix: LXC uses /usr/lib/x86_64-linux-gnu/lxc as the path to moun the container's root filesystem in its private mount namespace before it pivot_roots during restore. Unfortunately, that's also the location of the lxc-restore-net script which criu tries to execute. Since at this point the container's fs has already been mounted there, the callback (and thus the restore) fails.
+ Stable fix: Same as development fix
+ Testcase: create a container, then do:
+     sudo lxc-checkpoint -n $foo -s -D /tmp/checkpoint
+     sudo lxc-checkpoint -r -n $foo -D /tmp/checkpoint
+ 
+     The restore fails with,
+ 
+     sh: 1: /usr/lib/x86_64-linux-gnu/lxc/lxc-restore-net: not found
+ 
+ Regression potential: This can't effect anything besides lxc-checkpoint -r, which is broken anyways, so there should be no regressions.
+ ================================================================
+ 
+ 
  A patch for this has been posted to the upstream LXC list here:
  
  https://lists.linuxcontainers.org/pipermail/lxc-
  devel/2014-October/010741.html

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https://bugs.launchpad.net/bugs/1384751

Title:
  checkpoint restore fails with /usr/lib/x86_64-linux-gnu/lxc/lxc-
  restore-net: not found

Status in “lxc” package in Ubuntu:
  Fix Released
Status in “lxc” source package in Utopic:
  Triaged
Status in “lxc” source package in Vivid:
  Fix Released

Bug description:
  ================================================================
  Impact: restoring containers from a checkpoint doesn't work
  Development fix: LXC uses /usr/lib/x86_64-linux-gnu/lxc as the path to moun the container's root filesystem in its private mount namespace before it pivot_roots during restore. Unfortunately, that's also the location of the lxc-restore-net script which criu tries to execute. Since at this point the container's fs has already been mounted there, the callback (and thus the restore) fails.
  Stable fix: Same as development fix
  Testcase: create a container, then do:
      sudo lxc-checkpoint -n $foo -s -D /tmp/checkpoint
      sudo lxc-checkpoint -r -n $foo -D /tmp/checkpoint

      The restore fails with,

      sh: 1: /usr/lib/x86_64-linux-gnu/lxc/lxc-restore-net: not found

  Regression potential: This can't effect anything besides lxc-checkpoint -r, which is broken anyways, so there should be no regressions.
  ================================================================

  
  A patch for this has been posted to the upstream LXC list here:

  https://lists.linuxcontainers.org/pipermail/lxc-
  devel/2014-October/010741.html

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