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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1131588

Title:
  virt drivers' resume_state_on_host_boot don't handle migrating
  instances

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  nova-compute's init_host() can attempt to resume instances that are
  found not to be in RUNNING power state... but should be.

  For xenapi, the driver just tries to 'power on' the instance.
  For libvirt, it tries to do a hard reboot.

  Neither method account for 'resize_migrating' task state... where (at
  least in XenAPI), the instance would have been renamed to append
  '-orig' to it.  The driver will raise NotFound because it can't find
  the instance.

  nova-compute's init_host() will catch all Exceptions and set the
  instance to ERROR...  but it seems that since we have code to clean up
  the destination (there's code that looks at all instances in the
  driver and looks to see if their 'host' changed... and destroys them
  if so)...  we could potentially clean up the source as well.  Rename
  the instance back, clear task_state, and restart the old instance?

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