Comment 5 for bug 1776984

Reviewed: https://review.openstack.org/578494
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=e5f292aa8a4388d4cf0f70692d85d830704511fc
Submitter: Zuul
Branch: stable/queens

commit e5f292aa8a4388d4cf0f70692d85d830704511fc
Author: Swaminathan Vasudevan <email address hidden>
Date: Thu Jun 14 13:49:23 2018 -0700

    DVR: Self recover from the loss of 'fg' ports in FIP Namespace

    Sometimes we have seen the 'fg' ports within the fip-namespace
    either goes down, not created in time or getting deleted due to
    some race conditions.
    When this happens, the code tries to recover itself after couple
    of exceptions when there is a router_update message.
    But after recovery we could see that the fip-namespace is
    recreated and the 'fg-' port is plugged in and active, but the
    'fpr' and the 'rfp' ports are missing which leads to the
    FloatingIP failure.

    This patch will fix this issue by checking for the missing devices
    in all router_updates.

    Change-Id: I78c7ea9f3b6a1cf5b208286eb372da05dc1ba379
    Closes-Bug: #1776984
    (cherry picked from commit 5a7c12f245fd665de5a0364059e4ad918def3e12)