Comment 21 for bug 1398999

Reviewed: https://review.openstack.org/176768
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=98834ab9f745d53dd3bf40e486e4b8f14f1fd47e
Submitter: Jenkins
Branch: stable/juno

commit 98834ab9f745d53dd3bf40e486e4b8f14f1fd47e
Author: Chris St. Pierre <email address hidden>
Date: Wed Dec 3 16:16:34 2014 -0600

    libvirt: Fail when live block migrating instance with volumes

    This raises an exception when attempting to live block migrate (nova
    live-migration --block-migrate) an instance with attached volumes.
    libvirt copies these volumes 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.

    (cherry picked from commit d667b6a63e80b2f8d6311c2cf224ba32628eed84)

    Closes-Bug: 1398999
    Change-Id: Ibcd423976bb9fea46e3e1cb23cc8e5cd944d8fc2