MM2 Switchover and Failover process

[lsoica]

I'm configuring Kafka replication using MirrorMaker 2 (MM2) across two Kubernetes clusters, A and B. Each cluster runs the Strimzi operator and a Kafka server.

I begin by deploying MM2 on cluster B to replicate data from A to B.

For a switchover:

1. Stop consumers on A.
2. Stop MM2 on B.
3. Deploy MM2 on A to replicate from B to A, using auto.offset.reset: latest.
4. Move consumers to B (my understanding here is that consumers will take it over from where they left of in A).

Later, I want to switch back:

1. Stop consumers on B.
2. Stop MM2 on A.
3. Deploy MM2 on B to replicate from A to B again.

At this point, MM2's internal topics on B may be outdated. Should I first remove the MM2 internal topics on B, or is there something I'm missing in my understanding?