[Bug 1070914] Re: lucid containers don't start on quantal hosts

[Serge Hallyn]

** Description changed:

  Because devtmpfs is now mounted in containers, and /dev/shm is a symlink
  in devtmpfs, lucid containers now fail to start.
+ 
+ ======================================
+ SRU Justification:
+ 1. Impact: newly created lucid containers cannot be started, and changes in
+ the container's /dev are seen in the host's /dev.
+ 2. Development fix: devtmpfs is removed from the container fstabs
+ 3. Stable fix: same as development fix
+ 4. Test case:
+ 	1. sudo lxc-create -t ubuntu -n l1 -- -F -r lucid
+ 	2. sudo lxc-start -n l1 -d
+ 	3. sudo lxc-ps -n l1
+     Only three tasks will show up in lxc-ps, because lxc-start will hang at
+     mountall when failing to mount /dev onto a symbolic link (/dev/shm).
+ 5. Regression potential:  This will require workarounds in the cloud images
+ (which recently stopped including a populated /dev, and will need to do so
+ again).  That will be fixed by utlemming by Oct 25.  It also regresses a bug
+ in grub updates in containers.  This will need to be worked around by having
+ update-grub detect that it is in a container, and not fail due to non-existing
+ /dev/root in that case.
+ ======================================

** Changed in: lxc (Ubuntu Quantal)
       Status: New => Triaged

** Changed in: lxc (Ubuntu Quantal)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1070914

Title:
  lucid containers don't start on quantal hosts

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