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[OpenStack Infra <1647451@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/407147
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=4a5ecf1e29c3bdbb022f98a5fba41d4e7df56d88
Submitter: Jenkins
Branch:    master

commit 4a5ecf1e29c3bdbb022f98a5fba41d4e7df56d88
Author: Timofey Durakov <tdurakov@xxxxxxxxxxxx>
Date:   Thu Dec 1 19:03:24 2016 +0300

    fix for auth during live-migration
    
    Post step could fail due to auth token expiration.
    get_instance_nw_info fails with authentication required,
    because there are several calls to neutron api, some of them
    are admin context, while others try to use token from request
    context. This patch ensure that if admin context is initially used,
    all subsequent calls will use the same initialized client
    
    Closes-Bug: #1647451
    
    Change-Id: I8962a9cd472cbbb5b9b67c5b164ff29fd8f5558a


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

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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):
  Fix Released

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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