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[Alan Pevec <1296414@xxxxxxxxxxxxxxxxxx>]

** Also affects: nova/kilo
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1296414

Title:
  quotas not updated when periodic tasks or startup finish deletes

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) kilo series:
  New

Bug description:
  There are a couple of cases in the compute manager where we don't pass
  reservations to _delete_instance().  For example, one of them is
  cleaning up when we see a delete that is stuck in DELETING.

  The only place we ever update quotas as part of delete should be when
  the instance DB record is removed. If something is stuck in DELETING,
  it means that the quota was not updated.  We should make sure we're
  always updating the quota when the instance DB record is removed.

  Soft delete kinda throws a wrench in this, though, because I think you
  want soft deleted instances to not count against quotas -- yet their
  DB records will still exist. In this case, it seems we may have a race
  condition in _delete_instance() -> _complete_deletion() where if the
  instance somehow was SOFT_DELETED, quotas would have updated twice
  (once in soft_delete and once in _complete_deletion).

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