Comment 11 for bug 1740450

Reviewed: https://review.openstack.org/559865
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=cf14d20b543662847e2be00af84633b5b3bfd9b5
Submitter: Zuul
Branch: stable/pike

commit cf14d20b543662847e2be00af84633b5b3bfd9b5
Author: Swaminathan Vasudevan <email address hidden>
Date: Fri Mar 23 15:11:13 2018 -0700

    DVR: Restarting l3 agent loses centralized fip ip on qg-interface

    When l3 agent is restarted on a dvr_snat node that is configured
    for L3_HA and has a centralized FloatingIP configured to the
    qg-interface in the snat_namespace, that FloatingIP is not
    re-configured to the qg-interface when agent starts.

    The reason being, the cidr is not being retrieved from the
    keepalived instance and only retrieved from the
    centralized_fip_cidr_set.

    If 'L3_HA' is configured we need to retrieve it from the keepalived
    instance.

    This patch fixes the problem by retrieving the cidrs from the
    keepalived instance for the qg-interface.

    Change-Id: I848a20d06e2d344503a4cb1776dbe2617d91bc41
    Closes-Bug: #1740450
    (cherry picked from commit 64028a389ff904f15e471b44bd5b3979c5db2cd2)