A mix of Topology 1 and Topology 2:
In this topology, we have some producers/consumers that are local to a given cluster while others can produce/consume to any cluster.
The benefit of this topology is that applications can choose to produce/consume locally to their cluster and let the cluster-level load-balancer balance the load between nodes OR they can choose to produce/consume from the federation-level load-balancer.
When using load-balancer with RabbitMQ, the nodes act as servers and the Producers and Consumers are the customers. It is depicted in the following diagram.
The applications only know about the load-balancer IP. ...
