Comment 4 for bug 1475411

Reviewed: https://review.openstack.org/211051
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=587092c909e15e983f7aef31d7bc0862271a32c7
Submitter: Jenkins
Branch: stable/kilo

commit 587092c909e15e983f7aef31d7bc0862271a32c7
Author: Anthony Lee <email address hidden>
Date: Thu Jul 16 13:02:00 2015 -0700

    Fix live-migrations usage of the wrong connector information

    During the post_live_migration step for the Nova libvirt driver
    an incorrect assumption is being made about the connector
    information being sent to _disconnect_volume. It is assumed that
    the connection information on the source and destination is the
    same but that is not always the case. The BDM, where the
    connector information is being retrieved from only contains the
    connection information for the destination. This will not work
    when trying to disconnect volumes from the source during live
    migration as the properties such as the target_lun and
    initiator_target_map could be different. This ends up leaving
    behind dangling LUNs and possibly removing the incorrect
    volume's LUNs.

    The solution proposed here utilizes the connection_info that
    can be retrieved for a host from Cinder's initialize_connection
    API. This connection information contains the correct data for
    the source host and allows volume LUNs to be removed properly.

    --

    NOTE(sahid): The TODO comment in the original change on master is
    omitted here since os-brick wasn't used by nova in kilo so leaving
    it in the backport would be confusing.

    Change-Id: I3dfb75eb58dfbc66b218bcee473af4c2ac282eb6
    Closes-Bug: #1475411
    Closes-Bug: #1288039
    Closes-Bug: #1423772