Revision 82

This release upgraded Apache Kafka to 3.9.0 and Apache ZooKeeper to 3.9.2, and added support for Cruise Control partition rebalancing, KRaft, Karapace, and backup and restore through S3.

Kafka K8s on Charmhub | Deploy guide | Upgrade instructions | System requirements

Charmed Apache Kafka K8s

Features

• Cruise Control partition rebalancing (DPE-2872)

• KRaft consensus protocol (DPE-4328)

• Cross-model K8s relations with juju expose (DPE-6574)

• Multi-certificate CA chains (DPE-6260)

• Non-unit and non-port extra listeners (DPE-6636)

Improvements and fixes

This release reworked status handling and the central broker relation, improved KRaft scaling, secured ZooKeeper data, restored prefixed topic names, removed lost+found from new storage, improved certificate SAN handling, and stabilised integration tests. See the GitHub release history for the complete change list.

Charmed Apache ZooKeeper K8s

This release added S3 integration, external exposure, digest authentication, TLS certificate chains, backup and restore actions, TLS 1.2 client communication, and several reconfiguration and relation cleanup fixes.

Compatibility at release time

Principal charms supported Ubuntu 22.04 LTS.

Charm	Revision	Architecture	Juju	Artefacts
Charmed Apache Kafka K8s	82	AMD64	2.9.45+, 3.1+	Kafka 3.9.0-ubuntu1; charmed-kafka rock sha256:fa919f
Charmed Apache ZooKeeper K8s	51	AMD64	2.9.45+, 3.1+	ZooKeeper 3.8.2-ubuntu0; charmed-zookeeper rock sha256:a7a004

Apache Kafka release notes: 3.7.0, 3.8.0, and 3.9.0.