Comment 29 for bug 1744062

I've tested the xenial-proposed package with Openstack Mitaka and confirm that it now behaves in the same way as 1.3.9 from Bionic i.e. if I kill the neutron state change agent then keepalived:

pkill -f "/usr/bin/neutron-keepalived-state-change --router_id=ROUTER_UUID"
pkill -f "/var/lib/neutron/ha_confs/ROUTER_UUID/keepalived.conf"

I see the same behavior in that when the l3agent respawns keepalived it does so prior to spawning the state change agent (a.k.a ip -o monitor) which results in (a) keepalived transitioning to backup (b) keepalived deconfiguring the vip, evip etc and (c) neutron never seeing the deconfigure since it happens prior to ip -o monitor being run (by neutron-keepalived-state-change). So (a) and (b) confirm this patch is good and (c) needs fixing in neutron.