Matthew, I wonder what the expected behavior would be when topic-creation is disabled and MM is asked to replicate a topic that doesn't exist on the target cluster? Maybe the task should fail at that point, or maybe it should replicate whatever it can?
I think the current behavior is reasonable, esp considering precedent from Connect and Streams, both of which actively create topics as needed. But I understand the motivation. Have they considered revoking topic creation permission using ACLs? Ryanne On Fri, Jun 11, 2021, 3:54 AM Matthew de Detrich <matthew.dedetr...@aiven.io.invalid> wrote: > Hello everyone, > > We have an interesting feature request from a client regarding having the > property of automatic topic creation to be reflected in a MM2. Specifically > the current behaviour where if you have automatic topic creation set to > false for the original Kafla cluster, MM2 configuration ignores this which > means that if Kafka clients send messages to the MM2 then topics will still > be automatically created on target cluster. The core problem here for the > client is that our client wants to have complete control over how topics > get created (i.e. with terraform setup scripts) and with the current > behaviour this is not possible. > > Of course this poses other problems if we did want to change the behaviour > as stated earlier, i.e. if you update the configuration for the original > Kafka cluster then you get into open questions about how to reflect this > configuration onto the mirror maket (this is why its called "mirror"). Is > making MM2 reflect that flag a feature that makes general or alternately is > there another variation that makes more sense (i.e. having a separate > specific property rather than reusing the current automatic topic creation > one). > > There is a currently existing issue on this at > https://issues.apache.org/jira/browse/KAFKA-12753 > > @Ryanne @Mickael Since you guys are the main developers on MM/MM2 what are > your thoughts on this? > > > -- > > Matthew de Detrich > > *Aiven Deutschland GmbH* > > Immanuelkirchstraße 26, 10405 Berlin > > Amtsgericht Charlottenburg, HRB 209739 B > > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen > > *m:* +491603708037 > > *w:* aiven.io *e:* matthew.dedetr...@aiven.io >
