Comment 21 for bug 1665667

Reviewed: https://review.openstack.org/527099
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible/commit/?id=8c0ce1c62f73f880ed255b20ea932852288d23e9
Submitter: Zuul
Branch: stable/pike

commit 8c0ce1c62f73f880ed255b20ea932852288d23e9
Author: Kevin Carter <email address hidden>
Date: Thu Nov 16 11:59:21 2017 -0600

    Change the galera health check for better cluster health

    The current galera cluster health check simply logs into a cluster node
    but does not check if the node is sync'd. This can lead to an issue
    where a node is placed back into the pool before it is ready. If this
    happens it can lead to a broken OpenStack environment until the wsrep
    received queue is processed which is especially true if the node out of
    sync happens to be the primary.

    Combined backport of:
    - https://review.openstack.org/520673
    - https://review.openstack.org/523854
    - https://review.openstack.org/524107

    Closes-Bug: #1665667
    Change-Id: I49e371a2743618a0b5544a23e892aa28bb8567eb
    Depends-On: I81c924464aa4b19c2a62f37b5bf26c3c0453786a
    Depends-On: Ie1b3b9724dd33de1d90634166e585ecceb1f4c96
    Signed-off-by: Kevin Carter <email address hidden>