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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

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

** Changed in: nova/pike
       Status: New => Fix Released

** Changed in: nova
   Importance: Undecided => Medium

** Changed in: nova/pike
   Importance: Undecided => Medium

** Changed in: nova/pike
     Assignee: (unassigned) => Matt Riedemann (mriedem)

** Changed in: nova/pike
       Status: Fix Released => In Progress

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https://bugs.launchpad.net/bugs/1724621

Title:
  nova-manage cell_v2 verify_instance returns a valid instance mapping
  even after the instance is deleted/archived

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) pike series:
  In Progress

Bug description:
  Although nova-manage cell_v2 verify_instance is used to check if the
  provided instance is correctly mapped to a cell or not, this should
  not be returning a valid mapping message if the instance itself is
  deleted. It should return an error message saying 'The instance does
  not exist'.

  Steps to reproduce :

  1. Create an instance :

  -> nova boot --image 831bb8a0-9305-4cd7-b985-cbdadfb5d3db --flavor m1.nano test
  -> nova list
  +--------------------------------------+--------+--------+------------+-------------+---------------------------------+
  | ID                                   | Name   | Status | Task State | Power State | Networks                        |
  +--------------------------------------+--------+--------+------------+-------------+---------------------------------+
  | aec6eb34-6aaf-4883-8285-348d40fdac87 | test   | ACTIVE | -          | Running     | public=2001:db8::4, 172.24.4.9  |
  +--------------------------------------+--------+--------+------------+-------------+---------------------------------+

  
  2. Delete the instance :

  -> nova delete test
  Request to delete server test has been accepted.
  -> nova list
  +--------------------------------------+--------+--------+------------+-------------+---------------------------------+
  | ID                                   | Name   | Status | Task State | Power State | Networks                        |
  +--------------------------------------+--------+--------+------------+-------------+---------------------------------+
  +--------------------------------------+--------+--------+------------+-------------+---------------------------------+

  
  3. Verify Instance :

  -> nova-manage cell_v2 verify_instance --uuid aec6eb34-6aaf-4883-8285-348d40fdac87
  Instance aec6eb34-6aaf-4883-8285-348d40fdac87 is in cell: cell5 (c5ccba5d-1a45-4739-a5dd-d665a1b19301)

  Basically the message that we get is misleading for a deleted
  instance. This is because verify_instance queries the
  instance_mappings table which maintains a mapping of the deleted
  instances as well.

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