Comment 23 for bug 1404743

Reviewed: https://review.openstack.org/252852
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=1eb40b49f3da95e7960860da1033ee15932929ef
Submitter: Jenkins
Branch: stable/liberty

commit 1eb40b49f3da95e7960860da1033ee15932929ef
Author: Oleg Bondarev <email address hidden>
Date: Thu Dec 3 12:52:51 2015 +0300

    Ensure l3 agent receives notification about added router

    Currently router_added (and other) notifications are sent
    to agents with an RPC cast() method which does not ensure that
    the message is actually delivered to the recipient.
    If the message is lost (due to instability of messaging system
    in some failover scenarios for example) neither server nor agent
    will be aware of that and router will be "lost" till next agent
    resync. Resync will only happen in case of errors on agent side
    or restart.
    The fix makes server use call() to notify agents about added routers
    thus ensuring no routers will be lost.
    This also unifies reschedule_router() method to avoid code duplication
    between legacy and dvr agent schedulers.

    Closes-Bug: #1482630
    Related-Bug #1404743
    Change-Id: Id08764ba837d8f47a28649d081a5876797fe369e
    (cherry picked from commit 30b121dfa4d8542665b2209d21ece805d8957aa5)