Comment 3 for bug 1577570

Reviewed: https://review.openstack.org/311860
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=6e65c8fc0a3c2b4025b08d1a2c8b03696e8fb7f6
Submitter: Jenkins
Branch: master

commit 6e65c8fc0a3c2b4025b08d1a2c8b03696e8fb7f6
Author: Ian Pilcher <email address hidden>
Date: Mon May 2 16:21:55 2016 -0500

    Disable VIPs before stopping cluster during version upgrade

    If "pcs cluster stop --all" is executed on a controller that
    happens to have a VIP on the internal network, pcs may use the
    VIP as the source address for communication with another cluster
    node. When pacemaker is stopped this VIP goes away, and pcs never
    receives a response from the other node. This causes pcs to hang
    indefinitely; eventually the upgrade times out and fails.

    Disabling the VIPs before stopping the cluster avoids this
    situation.

    Change-Id: I6bc59120211af28456018640033ce3763c373bbb
    Closes-Bug: 1577570