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[Adam Gandelman <1319182@xxxxxxxxxxxxxxxxxx>]

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

** Changed in: nova/icehouse
       Status: New => Fix Committed

** Changed in: nova/icehouse
    Milestone: None => 2014.1.3

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https://bugs.launchpad.net/bugs/1319182

Title:
  Pausing a rescued instance should be impossible

Status in OpenStack Compute (Nova):
  Fix Released
Status in OpenStack Compute (nova) icehouse series:
  Fix Committed

Bug description:
  In the following commands, 'vmtest' is a freshly created virtual
  machine.

  
  $ nova show vmtest | grep -E "(status|task_state)"
  | OS-EXT-STS:task_state                | -
  | status                               | ACTIVE

  $ nova rescue vmtest
  +-----------+--------------+
  | Property  | Value
  +-----------+--------------+
  | adminPass | 2ZxvzZULT4sr
  +-----------+--------------+

  $ nova show vmtest | grep -E "(status|task_state)"
  | OS-EXT-STS:task_state                | -
  | status                               | RESCUE

  $ nova pause vmtest

  $ nova show vmtest | grep -E "(status|task_state)"
  | OS-EXT-STS:task_state                | -
  | status                               | PAUSED

  $ nova unpause vmtest

  $ nova show vmtest | grep -E "(status|task_state)"
  | OS-EXT-STS:task_state                | -
  | status                               | ACTIVE

  Here, we would want the vm to be in the 'RESCUE' state, as it was
  before being paused.

  $ nova unrescue vmtest
  ERROR (Conflict): Cannot 'unrescue' while instance is in vm_state active (HTTP 409) (Request-ID: req-34b8004d-b072-4328-bbf9-29152bd4c34f)

  The 'unrescue' command fails, which seems to confirm that the VM was
  no longer being rescued.

  
  So, two possibilities:
  1) When unpausing, the vm should go back to 'rescued' state
  2) Rescued vms should not be allowed to be paused, as is indicated by this graph: http://docs.openstack.org/developer/nova/devref/vmstates.html

  
  Note that the same issue can be observed with suspend/resume instead of pause/unpause, and probably other commands as well.

  WDYT ?

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