⚠️ Important: Strimzi 0.41 supports only Kubernetes 1.23 and newer. Kubernetes versions 1.21 and 1.22 are no longer supported.

Main changes since 0.40.0

This release contains the following new features and improvements:

• Support for Apache Kafka 3.6.2
• Metrics to monitor CA expiration
• Support for JBOD storage in KRaft mode. (Note: JBOD support in KRaft mode is considered early access in Apache Kafka 3.7.x)
• Support for changing topic replication factor by changing the KafkaTopic resources.
• The KafkaNodePools feature gate moves to GA stage and is permanently enabled without the possibility to disable it. To use the Kafka Node Pool resources, you still need to use the strimzi.io/node-pools: enabled annotation on the Kafka custom resources.
• Support for configuring the externalIPs field in node port type services.
• The UnidirectionalTopicOperator feature gate moves to GA stage and is permanently enabled without the possibility to disable it. If the topics whose names start with strimzi-store-topic and strimzi-topic-operator still exist, you can delete them.
• Improve validation of KafkaMirrorMaker2 resource to make sure the Connect cluster is set to the target cluster
• Support for custom SASL config in standalone Topic Operator deployment to support alternate access controllers (i.e. AWS_MSK_IAM)

All changes can be found under the 0.41.0 milestone.

Watch out also for some notable changes, deprecations, and removals:

• The tlsSidecar configuration for the Entity Operator is now deprecated and will be ignored.
• The zookeeperSessionTimeoutSeconds and topicMetadataMaxAttempts configurations for the Entity Topic Operator have been removed and will be ignored.

Maven artifacts

To test the Maven artifacts that are part of this release, use the staging repository by including the following in your pom.xml:

  <repositories>
    <repository>
      <id>staging</id>
      <url>https://oss.sonatype.org/content/repositories/iostrimzi-1217/</url>
    </repository>
  </repositories>

Upgrading from Strimzi 0.40.0

See the documentation for upgrade instructions.

Upgrading from Strimzi 0.22 or earlier

Direct upgrade from Strimzi 0.22 or earlier is not supported anymore! You have to upgrade first to one of the previous versions of Strimzi. You will also need to convert the CRD resources. For more details, see the documentation.

Container images

The following container images are part of this release:

New Contributors

• @kockas made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9810
• @maciej-tatarski made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9817
• @steffen-karlsson made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9831
• @rao2100 made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9815
• @Gartium made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9857
• @MichaelMorrisEst made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9906
• @dermasmid made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9951
• @rolandjohann made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9961
• @KyriosGN0 made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9963
• @maakuth made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9923
• @john-mcpeek made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9606
• @FlxPeters made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/9995
• @blaghed made their first contribution in https://github.com/strimzi/strimzi-kafka-operator/pull/10026

All changes

• docs(kafka): expands the content for handling large message sizes by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9790
• Bump main branch to 0.41.0-SNAPSHOT by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9803
• [ST] Fixups for few failing tests in nightlies by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9801
• [DOC] Fix and improve migration docs by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9804
• Add topic replication factor change by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/9483
• [ST] persistent kafka with 1 rep. instead ephemeral by @henryZrncik in https://github.com/strimzi/strimzi-kafka-operator/pull/9782
• [ST] Fix the issue with creating Kafka in CC tests in KRaft mode with lower Kafka version by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9808
• #9734 - added toString to whole model, including Password, PasswordSe… by @kockas in https://github.com/strimzi/strimzi-kafka-operator/pull/9810
• Add Strimzi 0.40.0 release to the main branch by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9816
• Promote KafkaNodePools feature gate to GA by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9811
• [DOC] Suggest removal of unused fields from Kafka CR after migration to node pools by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9809
• [DOC] Fix some leftovers from 0.40.0 release by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9822
• Fix value for all topics and groups selected in Strimzi Kafka Exporter dashboard by @maciej-tatarski in https://github.com/strimzi/strimzi-kafka-operator/pull/9817
• [ST] Fix and improve QuotasST by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9813
• [ST] Update upgrade/downgrade YAMLs and Environment class after 0.40.0 release by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9818
• docs(cruise control): employing cruise control to change topic replication factor by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9788
• [DOC] Add note about aggreated metrics produced by the quotas plugin by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/9827
• [ST] Enhance DrainCleanerST by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9829
• Change chart to table for log size by @maciej-tatarski in https://github.com/strimzi/strimzi-kafka-operator/pull/9830
• Update Kafka version in kafka-with-node-pools.yaml example by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9835
• #2779 CrdGenerator validate @JsonPropertyOrder by @steffen-karlsson in https://github.com/strimzi/strimzi-kafka-operator/pull/9831
• Add refactoring around replicas change handling by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/9821
• Add a single node KRaft example for use in quickstarts by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9837
• Bump Vert.x 4.5.5 by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9838
• [ST] Set STRIMZI_USE_NODE_POOLS_IN_TESTS to true by default by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9839
• Bump org.apache.zookeeper:zookeeper from 3.8.3 to 3.8.4 by @dependabot in https://github.com/strimzi/strimzi-kafka-operator/pull/9844
• Some minor refactoring on migration code by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9833
• [ST] KafkaConnect dynamic log level change test checks addition by @henryZrncik in https://github.com/strimzi/strimzi-kafka-operator/pull/9834
• [ST] - Topic replication change feature sts by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/9789
• External ip support by @rao2100 in https://github.com/strimzi/strimzi-kafka-operator/pull/9815
• [ST] (Kraft)KafkaUpgradeDowngrade decrease tests durations by @henryZrncik in https://github.com/strimzi/strimzi-kafka-operator/pull/9852
• [ST] fix flaky test in MultipleClusterOperatorsST by @henryZrncik in https://github.com/strimzi/strimzi-kafka-operator/pull/9850
• Added documentation about recommended Kubernetes labels by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9854
• Promote UnidirectionalTopicOperator feature gate to GA by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/9840
• Bump Vert.x 4.5.6 by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9865
• [ST] default builders for plain/tls internal clients by @henryZrncik in https://github.com/strimzi/strimzi-kafka-operator/pull/9658
• Handle x-kubernetes-preserve-unknown-fields in CRD for Kubernetes Resources object. by @Gartium in https://github.com/strimzi/strimzi-kafka-operator/pull/9857
• Abstract client certificate handling by @katheris in https://github.com/strimzi/strimzi-kafka-operator/pull/9545
• Remove unnecessary Secret mocks from KafkaReconcilerStatusTest by @katheris in https://github.com/strimzi/strimzi-kafka-operator/pull/9874
• Update Fabric8 to 6.11.0 by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9873
• docs(upgrade): updates node draining instructions following drain cleaner changes by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9878
• Move ShutdownHook class from operator-common to cluster-operator by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9877
• Remove Vert.x dependency from MicrometerMetricsProvider by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9879
• Remove the NoStackTraceTimeoutException by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9880
• Move unrelated clases from the package with resource operators by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9882
• Remove Vert.x dependency from the operator-common module and from UO and TO by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9887
• docs(storage): adds a description of tiered storage by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9866
• docs(pvc): updates the procedure to recover from a deleted cluster by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9884
• Bumped Vert.x 4.5.7 by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9890
• docs(node pools): impact on racks when moving nodes by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9894
• Pom refactoring on OpenTelemetry related dependencies by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9892
• Enhancing ReconcileResult with type parameter, instead of checking toString by @steffen-karlsson in https://github.com/strimzi/strimzi-kafka-operator/pull/9891
• Added roles column definition for the KafkaNodePool CRD by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9896
• Update Kaniko to 1.22 by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9898
• Reuse Util.decodeFromBase64 by @MichaelMorrisEst in https://github.com/strimzi/strimzi-kafka-operator/pull/9906
• #3761 Provide metrics to monitor certificates expiration by @steffen-karlsson in https://github.com/strimzi/strimzi-kafka-operator/pull/9861
• Refactor decoding Base64 to byte[] by @MichaelMorrisEst in https://github.com/strimzi/strimzi-kafka-operator/pull/9912
• docs(uto): removes some references to using the bidirectional topic operator by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9885
• docs(fips): note on NIST validation by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9913
• docs(fix): fixes link to image environment variables info by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9917
• [ST] Fix LoggingChangeST#testDynamicallySetConnectLoggingLevels for Kafka versions below 3.7.x by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9919
• Fix incorrect path in custom authorizer docs and improve them by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9920
• Add support for Kafka 3.6.2 by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9918
• Fix paused connector status when Connect is scaled to zero by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/9926
• Refactor InitWriterConfig by @Staniel in https://github.com/strimzi/strimzi-kafka-operator/pull/9922
• Fixed validation minimum Kafka version for migration by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9935
• Fixed KRaft detection script when broker in POST_MIGRATION by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9943
• Added Stopped column to the KafkaRebalance custom resource by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9944
• [ST] Move AZP profiles from STs' pom.xml and remove profiles related to Jenkins by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9942
• Avoid updating connector status again and again when Connect is scaled to 0 by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9945
• docs(node pools): reversing the migration to node pools by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9950
• docs(overview): updates to the overview for new features by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9953
• Removing the inner polling to check proposal request and rebalancing by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9940
• fix: use ipv4 for jmx, fixes: #9947 by @dermasmid in https://github.com/strimzi/strimzi-kafka-operator/pull/9951
• Updare Fabric8 to 6.12 by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9958
• Improve the separation between the Connect and MM2 operators by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9955
• Add whitespace to fix markdown formatting of inline code by @rolandjohann in https://github.com/strimzi/strimzi-kafka-operator/pull/9961
• Fix too long timeout in Kubernetes-based IT tests by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9968
• feat: add revisionHistoryLimit by @KyriosGN0 in https://github.com/strimzi/strimzi-kafka-operator/pull/9963
• Fix missing curly bracket in KRaft volume size query by @Frawless in https://github.com/strimzi/strimzi-kafka-operator/pull/9971
• MirrorMaker2: Add warning for dangerously invalid configuration by @maakuth in https://github.com/strimzi/strimzi-kafka-operator/pull/9923
• Fix auto-restarting of MM2 connectors by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9966
• Refactor key store trust store by @katheris in https://github.com/strimzi/strimzi-kafka-operator/pull/9941
• [ST] Fix MigrationST by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/9954
• Add JBOD support to KRaft mode by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9936
• Added a custom SASL config option to the Topic Operator #5473 by @john-mcpeek in https://github.com/strimzi/strimzi-kafka-operator/pull/9606
• Add trivial refactoring to reflect the change from client to handler by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/9992
• [performance] Introduction to performance testing by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/9907
• Add more unit tests for Label.class related to label filtering by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/9959
• docs(exporter): adds the showAllOffsets configuration to example Exporter config by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9991
• Fix invalid error message when topic RF change is disabled by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/9989
• Update Grafana dashboards to remove deprecated angular plugins by @Frawless in https://github.com/strimzi/strimzi-kafka-operator/pull/9982
• Add validation for unique volume IDs in JBOD storage by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9990
• Separate logging configuration and collecting plugin information from the conenctor reconciliation by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9987
• Fixed deletion of cluster metadata on rollback after JBOD in KRaft support by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/9993
• Remove last traces of ZKClient library from Strimzi by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9996
• fix(helm): add conditional namespace on watchAnyNamespace true by @FlxPeters in https://github.com/strimzi/strimzi-kafka-operator/pull/9995
• Add non empty condition to pending but completed log by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/10001
• Update various dependencies (Fabric8, Lombok and Jetty) by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/9999
• docs(otel): updates dependencies for Initializing tracing by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/10002
• Remove serializable from API by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/9997
• docs(diagrams): updates digrams to be more kraft friendly by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/9962
• [system test] - adapt JBOD system tests for KRaft and also make it co… by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/10007
• [ST] Bump version of test-clients to 0.8.0 and Jaeger's all-in-one image to 1.56 by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/10003
• Update TO design documentation with SKIP_CLUSTER_CONFIG_REVIEW by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/10014
• Remove events rule from entity-operator by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/10010
• [performance] - UserOperator bulk batch use case by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/10012
• Improve JBOD storage version validation in KRaft by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10017
• Add early-access warning about JBOD in KRaft to CHANGELOG and docs by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10019
• Address some trivial warnings and deprecations in two model test classes by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10024
• Fix offset.show-all switch in Kafka Exporter by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10022
• Remove unneeded state (old certificate secrets) from the Ca classes by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10023
• [system test] - Remove scalabillity test cases by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/10029
• Rebuild the Kafka Connect image only when the rebuild annotation is set to true by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10030
• [ST] enable all system test disable due to UTO and add admin client utils by @henryZrncik in https://github.com/strimzi/strimzi-kafka-operator/pull/9876
• [performance] - UserOperator capacity tests by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/10018
• [performance] Re-name perf test suites to not include in UTs by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/10043
• Improve broken ZooKeeperScaler tests by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10046
• docs(kafka): cleans up naming of kafka clusters by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/10049
• [performance] - propagate test context into metrics collecting by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/10047
• Improve ZooKeeper client handling in migration code by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10045
• Remove PKCS12 files from the server certificate secrets by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10044
• [system test] - KRaft JBOD test cases by @see-quick in https://github.com/strimzi/strimzi-kafka-operator/pull/10035
• docs(connectors): annotation to rebuild container image by @PaulRMellor in https://github.com/strimzi/strimzi-kafka-operator/pull/10048
• Don't fail reconciliation when Manual Rolling Update fails by @Staniel in https://github.com/strimzi/strimzi-kafka-operator/pull/10005
• Relax the KafkaConnect admin/loggers validation by @blaghed in https://github.com/strimzi/strimzi-kafka-operator/pull/10026
• [ST] Fix RackAwarenessST, JmxST, and file-sink image build by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/10060
• Move dependency analysis from the root pom.xml to the modules by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10062
• [ST] MigrationST - add checks for JBOD storage, change the main tests to be parametrized by @im-konge in https://github.com/strimzi/strimzi-kafka-operator/pull/10057
• Fix /controller znode failure handling during KRaft migration rollback by @ppatierno in https://github.com/strimzi/strimzi-kafka-operator/pull/10058
• Raise warning when kraftMetadata is used in storage configuration for ZooKeeper-based clusters by @scholzj in https://github.com/strimzi/strimzi-kafka-operator/pull/10067
• Cruise Control mock refactoring by @fvaleri in https://github.com/strimzi/strimzi-kafka-operator/pull/10056