Alexey Artamonov 7ab524d97b feat(kafka): allow multiple KRaft Kafka clusters per namespace
Fresh KRaft clusters no longer need to be alone in a namespace. Their node pools
are now release-scoped (`<release>-broker`, `<release>-controller`) instead of the
fixed `kafka`/`controller`, which is unique per namespace (KafkaNodePool object
names are namespace-unique) and lets any number of Kafka instances coexist —
every pod/PVC/Service is already prefixed by the unique cluster name.

The fixed `kafka` name is still required to adopt an existing ZooKeeper cluster's
`<cluster>-kafka-N` brokers and data in place during migration, and that name is
namespace-unique — so only one ZooKeeper->KRaft migration can run per namespace.
The broker pool name is resolved by kafka.brokerPoolName: "kafka" for a cluster
that already migrated or is a classic ZK cluster about to migrate, otherwise
"<release>-broker". A second migration into a namespace that already holds a
"kafka" pool owned by another cluster fails the render with a clear message;
fresh KRaft clusters are never affected.

This replaces the previous blanket "one Kafka per namespace" guard
(kafka.assertSingleInstance), which over-restricted the fresh case. The migration
hook and workload monitors follow the same naming; unit tests updated. Verified
on a live cluster: two fresh single-node KRaft clusters (mi-a, mi-b) installed
side by side in one namespace came up with distinct node pools, pods and PVCs.

Signed-off-by: Alexey Artamonov <aleksei.artamonov@aenix.io>
2026-08-31 16:46:39 +03:00
2025-10-08 09:43:34 +05:00
2024-02-08 12:04:32 +01:00

Cozystack Cozystack

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Cozystack

Cozystack is a free platform and framework for building clouds.

Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.

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