Comment 9 for bug 1841811

Reviewed: https://review.opendev.org/669847
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=176b30649b18f14818480ba3b6a76cfcf9f3aa26
Submitter: Zuul
Branch: master

commit 176b30649b18f14818480ba3b6a76cfcf9f3aa26
Author: Michele Baldessari <email address hidden>
Date: Wed Jul 24 08:57:36 2019 +0200

    Give the OVN DBS service a separate Vip

    This change (with its dependent reviews) creates a separate VIP for the OVN DBS
    service. A more detailed explanation can be found in https://bugs.launchpad.net/tripleo/+bug/1841811.
    The short explanation is that the OVN DBS HA service puts some additional constraints on the VIP it
    uses and that is problematic when that VIP is used by other services (e.g. a change in OVN DBS master
    will move the VIP and will also reset all mysql connections. It also prevents us splitting OVN DBS from
    where haproxy runs).

    Tested as follows:
    A) Deployed a mster environment with this review and all its dependencies and correctly obtained
    an OVN DBS service with its own Vip and the OVN services
    (controller/metadata) pointing to this separate Vip

    B) Deployed a master environment as is and then applied this review +
    dependencies and observed that a redeploy correctly created a new VIP,
    reconfigured the services to point to the new VIP and that the old
    obsolete constraints created around the per-network VIP were removed

    Closes-Bug: #1841811

    Depends-On: Ic62b0fbc0fee40638811a5cd77a5dc5a4d82acf5
    Change-Id: I620e37117c26b5b51bf9e1eda91daeb00fdf0f43