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

[Brian Murray]

Hello Chris, or anyone else affected,

Accepted nova into trusty-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/nova/1:2014.1.5-0ubuntu1.6 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: nova (Ubuntu Trusty)
       Status: In Progress => Fix Committed

** Tags added: verification-needed

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

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

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive icehouse series:
  In Progress
Status in OpenStack Compute (nova):
  Fix Released
Status in nova package in Ubuntu:
  Fix Released
Status in nova source package in Trusty:
  Fix Committed

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]

   * Cherry picked from upstream
     - removed unnecessary argument passing
     - add allowing ERROR state before evacuating.
   * actually, in code, added one parameter, and removed unused one.
     so very low regression possibility.
   * Tested on juju+maas test env.
   * Passed tempest smoke tests locally.

  Note: one simple way to put an instance into error state is to
  directly change its database record, for example "update instances set
  vm_state='error' where uuid='XXXXXXXX'"

  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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