Comment 1 for bug 892892

Thanks for reporting this bug.

The reason for this is that lxcguest bind-mounts a custom fstab over /lib/init/fstab when a container is booted. For the precise cycle, we intend to fix mountall so that we'll no longer need that hack. Once that's done, mountall upgrades will be able to proceed.

In the meantime, a workaround might be to umount /lib/init/fstab during a late stage of container boot, since it is only needed when mountall first starts. However, it's probable better to spend our time getting rid of lxcguest to really fix this bug.