[Bug 951150] [NEW] lxc-start-ephemeral is not all ephemeral

[Gary Poster]

Public bug reported:

The directories mounted both using the ephemeral's fstab and using -b
are not ephemeral.  Changes to them persist on the filesystem, and are
thus shared across other ephemeral instances that mount the same
directories.

We have a branch that addresses this concern.  We took the approach that
-b should bind ephemeral directories; *and* if the destination directory
is in the ephemeral's inherited fstab, we disable that mount from the
fstab.

Thus, if a base container's fstab mounts proc, sys, and /home/gary, and
you pass "-b /home/gary" to lxc-start-ephemeral, /home/gary will be
mounted as an ephemeral, local copy; otherwise, without the -b, the
fstab entry will be mounted as usual, and /home/gary will be persisted
and shared.

** Affects: lxc (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  lxc-start-ephemeral is not all ephemeral

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