Charmed Kafka K8s Documentation - Reference - Release 56 / 51

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Revision 56/51

Wednesday, February 28, 2024

Dear community,

We are extremely thrilled and excited to share that Charmed Kafka K8s and Charmed ZooKeeper K8s have now been released as GA. You can find them in charmhub.io under the 3/stable track.

More information are available in the Canonical website, alongside its documentation. Also find the full announcement of the release here and here. And more importantly, make sure you don’t miss out the webinar that Raúl Zamora and Rob Gibbon will be holding later today.

Please reach out should you have any question, comment, feedback or information. You can find us here in Matrix or also on Discourse.

Features

  • Deploying on Kubernetes (tested with MicroK8s)
  • ZooKeeper using SASL authentication
  • Scaling up/down in one simple Juju command
  • Multi-broker support and Highly-Available setups
  • Inter-broker authenticated communication
  • TLS/SSL support using tls-certificates Provider charms (see more here)
  • SASL/SCRAM and mTLS authentication for clients
  • DB access outside of Juju using data-integrator
  • Persistent storage support with Juju Storage
  • Super-user creation
  • Documentation featuring Diàtaxis framework

Canonical Data issues are now public on both Jira and GitHub platforms.

GitHub Releases provide a detailed list of bugfixes, PRs, and commits for each revision.

Inside the charms

  • Charmed ZooKeeper K8s charm ships the ZooKeeper 3.8.2-ubuntu0, built and supported by Canonical
  • Charmed Kafka K8s charm ships the Kafka 3.6.0-ubuntu0, built and supported by Canonical
  • Charmed ZooKeeper K8s charm is provided with the charmed-zookeeper rock on the 3-22.04_stable tag (based on top of a Ubuntu LTS “22.04” base)
  • Charmed Kafka K8s charm is provided with the charmed-kafka rock on the 3-22.04_stable tag (based on top of a Ubuntu LTS “22.04” base)

More information about the artifacts are provided by the following table:

Artifact Track/Series/Tag Version/Revision/Hash Code
ZooKeeper distribution 3.x 3.8.2-ubuntu0 5bb82d
Kafka distribution 3.x 3.6.0-ubuntu0 424389
Charmed ZooKeeper rock 3-22.04_stable sha256:a7a004 b56171
Zookeeper K8s operator 3/stable 51 48fa4f
Charmed Kafka rock 3-22.04_stable sha256:4b3495 66518b
Kafka K8s operator 3/stable 56 fe1f1c

Technical notes

  • A Charmed Kafka K8s cluster is secure by default, meaning that when deployed if there are no client charms related to it, external listeners will not be enabled.
  • We recommend to deploy one data-integrator with extra-user-roles=admin alongside the Kafka deployment, in order to enable listeners and also create one user with elevated permission to perform administrative tasks. For more information, see the How-to manage application guide.
  • The current version of Kafka does not yet support direct integration with Ingress, NodePort or LoadBalancer services. We recommend to use it for usage within the K8s network.
  • The current release has been tested with Juju 2.9.45+ and Juju 3.1+
  • Inplace upgrade for charms tracking latest is not supported, both for ZooKeeper and Kafka charms. Perform data migration to upgrade to a Charmed Kafka cluster managed via a 3/stable charm. For more information on how to perform the migration, see How-to migrate a cluster guide.