Comment 4 for bug 1279563

Reviewed: https://review.openstack.org/73428
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=ea7da5152cdca7ba674e2137c3899909995e2287
Submitter: Jenkins
Branch: master

commit ea7da5152cdca7ba674e2137c3899909995e2287
Author: Solly Ross <email address hidden>
Date: Tue Feb 4 14:27:51 2014 -0500

    Change listen address on libvirt live-migration

    Previously, in order for libvirt live migration to work,
    the graphics listen addresses (VNC and/or Spice) had to be
    set on both machines to be 0.0.0.0 or ::. This was because libvirt
    would try to rebind to the source address on the destination
    machine, but would fail due to the source machine already having
    that address (this would not happen for 0.0.0.0 or ::, however).

    Now, a modified copy of the instance's XML is passed to libvirt's
    migrate function, such that the listen addresses are that of the
    destination machine. The addresses are stashed in the pre-migration
    data by the destination pre-migration method.

    Note that this functionality will only work on versions of libvirt
    with the VIR_DOMAIN_XML_MIGRATABLE flag. If the flag is not detected
    (anything vanilla libvirt less than 1.0.0), the live migration code
    will fall back to the old method.

    Fixes: bug #1279563

    Change-Id: I6c9500283027193179c11d18ad4242e165a9ad6e