Since many of our applications will likely wish to use RabbitMQ for
private things like work queues, using separate vhosts is a good idea.
This sets up a single vhost to act as a fedmsg replacement (called
pubsub) and configures it for high availability.
The HA policy mirrors queues to all nodes in the cluster and enables
automatic synchronization with a batch size of 10K messages. Automatic
synchronization means that when a new node joins the cluster, all
messages from existing nodes are pushed to the new node, blocking queue
activity until mirroring is complete.
Signed-off-by: Jeremy Cline <jcline@redhat.com>
