We use MirrorMaker version 1 to mirror data back and forth between various Kafka clusters. The tool does not fulfill all wishes, but for us it is perfect (since we designed our system around MM1, since MM2 did not exist yet).
Since MM1 is considered obsolete and will be removed from the code base, we will have to switch to MM2. Basically this is not a problem, but a real difficulty are the new internal topics that are generated (heartbeats, mm2-configs, mm2-offsets, …).
In our system the MirrorMaker process (and also no other) is not allowed to create topics on any system. So is it really necessary for the MM2 to create these topics? Or is there also a possibility to run MM2 without these topics (maybe with reduced functionality, which I don’t need anyway)?
If it’s not possible, is it at least possible for the topics that don’t have cluster alias (e.g. heartbeats) to be used by multiple MM2 processes (with different configuration)?
By the way, from no case I will mirror any consumer group offsets. As far as I know MM2 does support this. But is there a way to disable this feature?