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[OpenStack Infra <1398999@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/227278
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=23fd0389f0e23e7969644079f4b1ad8504cbb8cb
Submitter: Jenkins
Branch:    master

commit 23fd0389f0e23e7969644079f4b1ad8504cbb8cb
Author: Pawel Koniszewski <pawel.koniszewski@xxxxxxxxx>
Date:   Wed Feb 10 13:09:44 2016 +0100

    Allow block live migration of an instance with attached volumes
    
    Since libvirt 1.2.17 it is possible to select which block devices
    should be migrated to destination host. Block devices that are not
    provided will not be migrated. It means that it is possible to
    exclude volumes from block migration and therefore prevent volumes
    from being copied to themselves.
    
    This patch implements new check of libvirt version. If version is
    higher or equal to 1.2.17 it is possible to block live migrate vm
    with attached volumes.
    
    Co-Authored-By: Bartosz Fic <bartosz.fic@xxxxxxxxx>
    
    Change-Id: I8fcc3ef3cb5d9fd3a95067929c496fdb5976fd41
    Closes-Bug: #1398999
    Partially implements: blueprint block-live-migrate-with-attached-volumes


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

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https://bugs.launchpad.net/bugs/1398999

Title:
  Block migrate with attached volumes copies volumes to themselves

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) juno series:
  Fix Released
Status in libvirt package in Ubuntu:
  Fix Released
Status in nova package in Ubuntu:
  Triaged
Status in libvirt source package in Trusty:
  Confirmed
Status in nova source package in Trusty:
  Triaged
Status in libvirt source package in Utopic:
  Won't Fix
Status in nova source package in Utopic:
  Won't Fix
Status in libvirt source package in Vivid:
  Confirmed
Status in nova source package in Vivid:
  Triaged
Status in libvirt source package in Wily:
  Fix Released
Status in nova source package in Wily:
  Triaged

Bug description:
  When an instance with attached Cinder volumes is block migrated, the
  Cinder volumes are block migrated along with it. If they exist on
  shared storage, then they end up being copied, over the network, from
  themselves to themselves. At a minimum, this is horribly slow and de-
  sparses a sparse volume; at worst, this could cause massive data
  corruption.

  More details at http://lists.openstack.org/pipermail/openstack-
  dev/2014-June/038152.html

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