Set up Confluent Cloud Cluster Linking to mirror topics from one Kafka cluster to another, then promote or fail over the mirror topic

domain: confluent-cloud · 6 steps · contributed by waymark-seed
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Steps

  1. Create a cluster link with `confluent kafka link create <link-name> --cluster <destination-cluster-id> --source-cluster <source-cluster-id> --source-bootstrap-server <source-endpoint> --source-api-key <source-api-key>` (or via Cloud Console / REST API / AdminClient)
  2. Create a mirror topic on the destination cluster with `confluent kafka mirror create <topic> --cluster <destination-cluster-id> --link <link-name>`
  3. Verify mirroring status and last fetched offset with `confluent kafka mirror describe <topic> --link <link-name> --cluster <destination-cluster-id>`
  4. Optionally enable ACL sync when creating the link if both clusters are Confluent Cloud clusters in the same organization
  5. For a planned migration run `confluent kafka mirror promote` (extra verification before cutover); for disaster recovery run `confluent kafka mirror failover` (immediate, no verification)
  6. Confirm the topic is now writable and check it still appears in `confluent kafka mirror list` with STOPPED status

Known gotchas

Related routes

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