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[Timofey Durakov <tdurakov@xxxxxxxxxxxx>]

Public bug reported:

Description
===========
When live migration is finished it's possible that keystone auth token is already expired,
that causes for post_step to fail

Steps to reproduce
==================
there are 2 options to reproduce this issue:
1. run live-migration of heavy loaded instance, wait for token to expire, and after that try to execute live-migration-force-complete
2. set a breakpoint in _post_live_migration method of compute manager, once breakpoint is reached,
do openstack token revoke, continue nova execution normally

Expected result
===============
live-migration to be finished sucessfully

Actual result
=============
post step is failed, overall migration is also failed

Environment
===========
1. I've tested this case on Newton version, but the issue should be valid for master branch too.

2. Libvirt + kvm

2. Ceph

3. Neutron vxlan

** Affects: nova
     Importance: Medium
     Assignee: Timofey Durakov (tdurakov)
         Status: In Progress


** Tags: live-migration

** Changed in: nova
     Assignee: (unassigned) => Timofey Durakov (tdurakov)

** Changed in: nova
       Status: New => Confirmed

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

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https://bugs.launchpad.net/bugs/1647451

Title:
  Post live migration step could fail due to auth errors

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  Description
  ===========
  When live migration is finished it's possible that keystone auth token is already expired,
  that causes for post_step to fail

  Steps to reproduce
  ==================
  there are 2 options to reproduce this issue:
  1. run live-migration of heavy loaded instance, wait for token to expire, and after that try to execute live-migration-force-complete
  2. set a breakpoint in _post_live_migration method of compute manager, once breakpoint is reached,
  do openstack token revoke, continue nova execution normally

  Expected result
  ===============
  live-migration to be finished sucessfully

  Actual result
  =============
  post step is failed, overall migration is also failed

  Environment
  ===========
  1. I've tested this case on Newton version, but the issue should be valid for master branch too.

  2. Libvirt + kvm

  2. Ceph

  3. Neutron vxlan

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