Comment 2 for bug 1805826

Reviewed: https://review.openstack.org/620918
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=3f57d7380d8ffc6908750efb02ff2d0221839786
Submitter: Zuul
Branch: master

commit 3f57d7380d8ffc6908750efb02ff2d0221839786
Author: Jiri Stransky <email address hidden>
Date: Thu Nov 29 12:02:21 2018 +0100

    Fix pacemaker tagging race condition

    Change I81bc48b53068c3a5ed90266a4fd3e62bfb017835 moved image fetching
    and tagging for pacemaker-managed services from step 1 to step 2. This
    is also a step when the services are started, which probably
    introduced a race condition for environments where pacemaker cluster
    consists of more than one machine.

    During the deployment you can get a lot of pcmk failures like:

    failed to pull image 192.168.24.1:8787/tripleomaster/centos-binary-mariadb:pcmklatest

    This only happens on non-bootstrap nodes. On bootstrap node the order
    is still correct, first download and tag image, and then start the
    pcmk resources. However, if non-bootstrap nodes are slower with
    downloading and tagging, pacemaker there might start the resources
    before the images are tagged (as the starting of resources is
    controlled globally from bootstrap node).

    Change-Id: Id669cc9a296a8366c7c80a5ee509bdb964b62a04
    Closes-Bug: #1805826