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[Russell Bryant <1333827@xxxxxxxxxxxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => juno-2

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https://bugs.launchpad.net/bugs/1333827

Title:
  Libvirt-LXC can leave image mounted to host

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  If an error occurs creating a Libvirt+LXC domain, the code can leave
  the guest FS mounted to host preventing the `lvremove` of a delete
  from working.

  The core problem here is that any code between `setup_container` and
  `teardown_container` needs be within a `try/finally` block, so that on
  error, we unmount the image from the host.

  While we're at it, we can also cleanup the exception handling by
  reducing the 3 independent exception handlers into a single one, which
  is then followed by the `finally` clause.

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