Each time driver couldn't update from Redis
warning message is being logged and work continues
with cached targets state and on existing connections.
ZeroMQ driver options are current stored into the DEFAULT group.
This change makes the zmq configuration clearer by putting its
options into oslo_messaging_zmq group.
Co-Authored-By: Oleksii Zamiatin <email@example.com>
Currently proxy binds to a random port from a port range
specified in zmq config and therefore needs to register in
redis to become visible to clients and servers.
That could be done much simpler by using a static port(s) for
proxy. Moreover zmq handles reconnect to a socket if restarted
service uses the same port number as it had before restart.