[Bug 1298061] Re: nova should allow evacuate for an instance in the Error state

[James Page]

** Changed in: nova (Ubuntu)
       Status: New => Fix Released

** Changed in: nova (Ubuntu Trusty)
   Importance: Undecided => Medium

** Changed in: nova (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1298061

Title:
  nova should allow evacuate for an instance in the Error state

Status in OpenStack Compute (nova):
  Fix Released
Status in nova package in Ubuntu:
  Fix Released
Status in nova source package in Trusty:
  In Progress

Bug description:
  [Impact]

   * Instances in error state cannot be evacuated.

  [Test Case]

   * nova evacuate <error_state_instance> <another_compute_host>
   * nova refuses to evacuate the instance because of its state

  [Regression Potential]

   * None


  We currently allow reboot/rebuild/rescue for an instance in the Error
  state if the instance has successfully booted at least once.

  We should allow "evacuate" as well, since it is essentially a
  "rebuild" on a different compute node.

  This would be useful in a number of cases, in particular if an initial
  evacuation attempt fails (putting the instance into the Error state).

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