Comment 14 for bug 1784705

Reviewed: https://review.openstack.org/588036
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=dbce613a9aede3fc5463a2d383b355ffb8cda73a
Submitter: Zuul
Branch: stable/pike

commit dbce613a9aede3fc5463a2d383b355ffb8cda73a
Author: Matt Riedemann <email address hidden>
Date: Tue Jul 31 16:00:28 2018 -0400

    Add recreate test for RT.stats bug 1784705

    With change I6827137f35c0cb4f9fc4c6f753d9a035326ed01b in
    Ocata, we changed the ComputeManager to manage a single
    ResourceTracker and that single ResourceTracker will
    manage multiple compute nodes. The only time a single
    nova-compute service hosts multiple compute nodes is for
    ironic where there is a compute node per instance. The
    problem is the ResourceTracker.stats variable, unlike the
    ResourceTracker.compute_nodes variable, is not node-specific
    so it's possible for node stats to leak across nodes based
    on how the stats are used (and copied).

    This change adds a functional recreate test to show the issue
    before it's fixed. The fixture setup had to be tweaked a
    bit to avoid modifying class variables by reference between
    test cases.

    Change-Id: Icc5f615baa1042347ec1699eb84ba0670445b995
    Related-Bug: #1784705
    (cherry picked from commit fc05626d43571733da0803df0fd9a7c69766b8fd)
    (cherry picked from commit cc8167a1914a70ea7b336856285df2571a754ca0)