0.41.0

⚠️ 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)
• Continue reconciliation after failed manual rolling update using the strimzi.io/manual-rolling-update annotation (when the ContinueReconciliationOnManualRollingUpdateFailure feature gate is enabled)

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.

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:4c687a4fac96ffc22433ca6d00fb1bd31722767b44c9d87c465f95b57fb70089
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:c3a346235ce4dea42986648ca07f2482d8fc0bf654c1d441b1301a23999304db
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:bf49499980bbe5d4dd399de0dd396089b0fd9dd29bc46e14d39b20f1e826aec1
Apache Kafka 3.6.2	quay.io/strimzi/kafka@sha256:41811bb106d6182978a889eaedffeadffaa5ab1599c4cd8e4f5015b131c7ac30
Apache Kafka 3.7.0	quay.io/strimzi/kafka@sha256:6243d98890c665ef65b5f5fa2ffd046412281ffef31bc7a07cac37bd77b2579d
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:c833f930ead2d1e9054912a20689ee979d335f5e5ca8769e3c6b8a5514a0df96
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:9404037bd5431b012c8c633ec3345907667453c5532e5bfaaedc78286de22c62
Maven Builder	quay.io/strimzi/maven-builder@sha256:17f09b07fc41a059e6a048cb766046d43a072cfd3a8266c97388a37543dadee8

New Contributors

• @kockas made their first contribution in #9810
• @maciej-tatarski made their first contribution in #9817
• @steffen-karlsson made their first contribution in #9831
• @rao2100 made their first contribution in #9815
• @Gartium made their first contribution in #9857
• @MichaelMorrisEst made their first contribution in #9906
• @dermasmid made their first contribution in #9951
• @rolandjohann made their first contribution in #9961
• @KyriosGN0 made their first contribution in #9963
• @maakuth made their first contribution in #9923
• @john-mcpeek made their first contribution in #9606
• @FlxPeters made their first contribution in #9995
• @blaghed made their first contribution in #10026

What's Changed

• docs(kafka): expands the content for handling large message sizes by @PaulRMellor in #9790
• Bump main branch to 0.41.0-SNAPSHOT by @scholzj in #9803
• [ST] Fixups for few failing tests in nightlies by @im-konge in #9801
• [DOC] Fix and improve migration docs by @scholzj in #9804
• Add topic replication factor change by @fvaleri in #9483
• [ST] persistent kafka with 1 rep. instead ephemeral by @henryZrncik in #9782
• [ST] Fix the issue with creating Kafka in CC tests in KRaft mode with lower Kafka version by @im-konge in #9808
• #9734 - added toString to whole model, including Password, PasswordSe… by @kockas in #9810
• Add Strimzi 0.40.0 release to the main branch by @scholzj in #9816
• Promote KafkaNodePools feature gate to GA by @scholzj in #9811
• [DOC] Suggest removal of unused fields from Kafka CR after migration to node pools by @scholzj in #9809
• [DOC] Fix some leftovers from 0.40.0 release by @scholzj in #9822
• Fix value for all topics and groups selected in Strimzi Kafka Exporter dashboard by @maciej-tatarski in #9817
• [ST] Fix and improve QuotasST by @im-konge in #9813
• [ST] Update upgrade/downgrade YAMLs and Environment class after 0.40.0 release by @im-konge in #9818
• docs(cruise control): employing cruise control to change topic replication factor by @PaulRMellor in #9788
• [DOC] Add note about aggreated metrics produced by the quotas plugin by @fvaleri in #9827
• [ST] Enhance DrainCleanerST by @im-konge in #9829
• Change chart to table for log size by @maciej-tatarski in #9830
• Update Kafka version in kafka-with-node-pools.yaml example by @im-konge in #9835
• #2779 CrdGenerator validate @JsonPropertyOrder by @steffen-karlsson in #9831
• Add refactoring around replicas change handling by @fvaleri in #9821
• Add a single node KRaft example for use in quickstarts by @scholzj in #9837
• Bump Vert.x 4.5.5 by @ppatierno in #9838
• [ST] Set STRIMZI_USE_NODE_POOLS_IN_TESTS to true by default by @im-konge in #9839
• Bump org.apache.zookeeper:zookeeper from 3.8.3 to 3.8.4 by @dependabot in #9844
• Some minor refactoring on migration code by @ppatierno in #9833
• [ST] KafkaConnect dynamic log level change test checks addition by @henryZrncik in #9834
• [ST] - Topic replication change feature sts by @see-quick in #9789
• External ip support by @rao2100 in #9815
• [ST] (Kraft)KafkaUpgradeDowngrade decrease tests durations by @henryZrncik in #9852
• [ST] fix flaky test in MultipleClusterOperatorsST by @henryZrncik in #9850
• Added documentation about recommended Kubernetes labels by @ppatierno in #9854
• Promote UnidirectionalTopicOperator feature gate to GA by @fvaleri in #9840
• Bump Vert.x 4.5.6 by @ppatierno in #9865
• [ST] default builders for plain/tls internal clients by @henryZrncik in #9658
• Handle x-kubernetes-preserve-unknown-fields in CRD for Kubernetes Resources object. by @Gartium in https:...

0.41.0-rc3

⚠️ 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 0.41.0-rc2

• Improved documentation
• Fixed Grafana dashboards

All changes can be found under the 0.41.0 milestone.

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-1218/</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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:4c687a4fac96ffc22433ca6d00fb1bd31722767b44c9d87c465f95b57fb70089
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:c3a346235ce4dea42986648ca07f2482d8fc0bf654c1d441b1301a23999304db
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:bf49499980bbe5d4dd399de0dd396089b0fd9dd29bc46e14d39b20f1e826aec1
Apache Kafka 3.6.2	quay.io/strimzi/kafka@sha256:41811bb106d6182978a889eaedffeadffaa5ab1599c4cd8e4f5015b131c7ac30
Apache Kafka 3.7.0	quay.io/strimzi/kafka@sha256:6243d98890c665ef65b5f5fa2ffd046412281ffef31bc7a07cac37bd77b2579d
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:c833f930ead2d1e9054912a20689ee979d335f5e5ca8769e3c6b8a5514a0df96
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:9404037bd5431b012c8c633ec3345907667453c5532e5bfaaedc78286de22c62
Maven Builder	quay.io/strimzi/maven-builder@sha256:17f09b07fc41a059e6a048cb766046d43a072cfd3a8266c97388a37543dadee8

0.41.0-rc2

⚠️ 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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:7c2fdf0ed7f43cdd9be1a6f838ef63e33bd92e45146629623a7c7861c20e6bf8
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:dcc427656560b78050e2f8ac6f592711beb52687d5eb469dcb13ef30f6b20e6c
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:bd9762d427c825141e7f786455b082db0b7585ba54ee3fb710f2b43a8075c0e3
Apache Kafka 3.6.2	quay.io/strimzi/kafka@sha256:43b561f323abea2854e63c0e7ffb53e024ed01f7f218803a4da0f350c1a74d9c
Apache Kafka 3.7.0	quay.io/strimzi/kafka@sha256:cefea48c8e3538545ccdca061b8a46fb4c07897758028a59d8735b6126a76e60
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:c833f930ead2d1e9054912a20689ee979d335f5e5ca8769e3c6b8a5514a0df96
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:9404037bd5431b012c8c633ec3345907667453c5532e5bfaaedc78286de22c62
Maven Builder	quay.io/strimzi/maven-builder@sha256:9bd9ff43b12faa23dbcdd13934d1e49e3c7a8030780efee5cf24c4af1f3e0b43

New Contributors

• @kockas made their first contribution in #9810
• @maciej-tatarski made their first contribution in #9817
• @steffen-karlsson made their first contribution in #9831
• @rao2100 made their first contribution in #9815
• @Gartium made their first contribution in #9857
• @MichaelMorrisEst made their first contribution in #9906
• @dermasmid made their first contribution in #9951
• @rolandjohann made their first contribution in #9961
• @KyriosGN0 made their first contribution in #9963
• @maakuth made their first contribution in #9923
• @john-mcpeek made their first contribution in #9606
• @FlxPeters made their first contribution in #9995
• @blaghed made their first contribution in #10026

All changes

• docs(kafka): expands the content for handling large message sizes by @PaulRMellor in #9790
• Bump main branch to 0.41.0-SNAPSHOT by @scholzj in #9803
• [ST] Fixups for few failing tests in nightlies by @im-konge in #9801
• [DOC] Fix and improve migration docs by @scholzj in #9804
• Add topic replication factor change by @fvaleri in #9483
• [ST] persistent kafka with 1 rep. instead ephemeral by @henryZrncik in #9782
• [ST] Fix the issue with creating Kafka in CC tests in KRaft mode with lower Kafka version by @im-konge in #9808
• #9734 - added toString to whole model, including Password, PasswordSe… by @kockas in #9810
• Add Strimzi 0.40.0 release to the main branch by @scholzj in #9816
• Promote KafkaNodePools feature gate to GA by @scholzj in #9811
• [DOC] Suggest removal of unused fields from Kafka CR after migration to node pools by @scholzj in #9809
• [DOC] Fix some leftovers from 0.40.0 release by @scholzj in #9822
• Fix value for all topics and groups selected in Strimzi Kafka Exporter dashboard by @maciej-tatarski in #9817
• [ST] Fix and improve QuotasST by @im-konge in #9813
• [ST] Update upgrade/downgrade YAMLs and Environment class after 0.40.0 release by @im-konge in #9818
• docs(cruise control): employing cruise control to change topic replication factor by @PaulRMellor in #9788
• [DOC] Add note about aggreated metrics produced by the quotas plugin by @fvaleri in #9827
• [ST] Enhance DrainCleanerST by @im-konge in #9829
• Change chart to table for log size by @maciej-tatarski in #9830
• Update Kafka version in kafka-with-node-pools.yaml example by @im-konge in #9835
• #2779 CrdGenerator validate @JsonPropertyOrder by @steffen-karlsson in #9831
• Add refactoring around replicas change handling by @fvaleri in #9821
• Add a single node KRaft example for use in quickstarts by @scholzj in #9837
• Bump Vert.x 4.5.5 by @ppatierno in #9838
• [ST] Set STRIMZI_USE_NODE_POOLS_IN_TESTS to true by default by @im-konge in #9839
• Bump org.apache.zookeeper:zookeeper from 3.8.3 to 3.8.4 by @dependabot in #9844
• Some minor refactoring on migration code by @ppatierno in #9833
• [ST] KafkaConnect dynamic log level change test checks addition by @henryZrncik in #9834
• [ST] - Topic replication change feature sts by @see-quick in #9789
• External ip support by @rao2100 in #9815
• [ST] (Kraft)KafkaUpgradeDowngrade decrease tests durations by @henryZrncik in #9852
• [ST] fix flaky test in MultipleClusterOperatorsST by @henryZrncik in #9850
• Added documentation about recommended Kubernetes labels by @ppatierno in #9854
• Promote UnidirectionalTopicOperator feature gate to GA by @fvaleri in #9840
• Bump Vert.x 4.5.6 by @ppatierno in #9865
• [ST] default builders for plain/tls internal clients by @henryZrncik in https://...

0.40.0

⚠️ Important: From Strimzi 0.40 on, we support only Kubernetes 1.23 and newer. Kubernetes versions 1.21 and 1.22 are no longer supported.

Main changes since 0.39.0

This release contains the following new features and improvements:

• Add support for Apache Kafka 3.7.0. Remove support for Apache Kafka 3.5.0, 3.5.1, and 3.5.2.
• The UseKRaft feature gate moves to beta stage and is enabled by default. If needed, UseKRaft can be disabled in the feature gates configuration in the Cluster Operator.
• Add support for ZooKeeper to KRaft migration by enabling the users to move from using ZooKeeper to store metadata to KRaft.
• Add support for moving from dedicated controller-only KRaft nodes to mixed KRaft nodes
• Added support for Kafka Exporter offset.show-all parameter
• Prevent removal of the broker process role from KRaft mixed-nodes that have assigned partition-replicas
• Improve broker scale-down prevention to continue in reconciliation when scale-down cannot be executed
• Added support for Tiered Storage by enabling the configuration of custom storage plugins through the Kafka custom resource.
• Update HTTP bridge to the latest 0.28.0 release

All changes can be found under the 0.40.0 milestone.

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

• From Strimzi 0.40.0 on, we support only Kubernetes 1.23 and newer. Kubernetes 1.21 and 1.22 are not supported anymore.
• #9508 fixes the Strimzi CRDs and their definitions of labels and annotations. This change brings our CRDs in-sync with the Kubernetes APIs. After this fix, the label and annotation definitions in our CRDs (for example in the template sections) cannot contain integer values anymore and have to always use string values. If your custom resources use an integer value, for example:

  template:
    apiService:
      metadata:
        annotations:
          discovery.myapigateway.io/port: 8080
  

  You might get an error similar to this when applying the resource:

  spec.template.apiService.metadata.annotations.discovery.myapigateway.io/port: Invalid value: "integer": spec.template.apiService.metadata.annotations.discovery.myapigateway.io/port in body must be of type string: "integer"
  

  To fix the issue, just use a string value instead of an integer:

  template:
    apiService:
      metadata:
        annotations:
          discovery.myapigateway.io/port: "8080"
  

• Support for the JmxTrans component is now completely removed. If you are upgrading from Strimzi 0.34 or earlier and have JmxTrans enabled in .spec.jmxTrans of the Kafka custom resource, you should disable it before the upgrade or delete it manually after the upgrade is complete.
• The api module was refactored and classes were moved to new packages.
• Strimzi Drain Cleaner 1.1.0 (included in the Strimzi 0.40.0 installation files) changes the way it handles Kubernetes eviction requests. It denies them instead of allowing them. This new behavior does not require the PodDisruptionBudget to be set to maxUnavailable: 0. We expect this to improve the compatibility with various tools used for scaling Kubernetes clusters such as Karpenter. If you observe any problems with your toolchain or just want to stick with the previous behavior, you can use the STRIMZI_DENY_EVICTION environment variable and set it to false to switch back to the old (legacy) mode.

Upgrading from Strimzi 0.39.0

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:2228d89b53e3524e69d1bcf5c2cd373884ce696d9005389a6c78dad23310e837
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:2c143eb10b66037ef877311eb767457e4b877d5ff2c47d393c76babec155caff
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:e2b9f2835498831bbf30ac2d651de143d57088bcb23943101b066e941db92aca
Apache Kafka 3.7.0	quay.io/strimzi/kafka@sha256:c491a95f9b9b58f406461faf222ef612ad8d2f4d7b53f7f3645b20c99d7d1583
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:73deb1af0d93e9fa8955a5a412d0e7138384bdc80e7574e815d21796e446b636
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:3fb4ace22589fcf8d3f01b74c37b10b32d87e15d103ea59e0933b61c4e46ff4a
Maven Builder	quay.io/strimzi/maven-builder@sha256:d02a9b48c77a44eeab6426c9af4adf75405217994bcb01ce0196e616041350d8

New Contributors

• @mikekamornikov made their first contribution in #9476
• @MarkintoshZ made their first contribution in #9489
• @ilkerkocatepe made their first contribution in #9494
• @Anefu made their first contribution in #9520
• @vinod827 made their first contribution in #9672
• @Staniel made their first contribution in #9727

All changes

• Bump main branch to 0.40.0-SNAPSHOT by @scholzj in #9459
• docs(node pools): updates to node pools content to reflect move to beta by @PaulRMellor in #9460
• docs(upgrade): note on topic operator cleanup when upgrading with unidirectional mode by @PaulRMellor in #9464
• Use separate logger for Jetty in Topic Operator by @scholzj in #9468
• Update Cruise Control to 2.5.133 and Kaniko to 1.19.1 by @scholzj in #9472
• Fix the UTO upgrade issue reported in #9470. by @fvaleri in #9474
• Add UnlockExperimentalVMOptions to priority JVM options by @mikekamornikov in #9476
• Add Strimzi 0.39.0 to the main branch by @scholzj in #9479
• Renaming context handler variable on creation by @ppatierno in #9478
• Update supported Kubernetes version to 1.23+ by @scholzj in #9473
• docs(tls): updates the tls communication overview to accommodate kraft by @PaulRMellor in #9481
• Refactor cert handling by @katheris in #9463
• docs(drain cleaner): considerations when using anti-affinity by @PaulRMellor in #9482
• Fix NullPointerException From Missing listenerConfig by @MarkintoshZ in #9489
• Enable TO in KRaft examples by @scholzj in #9490
• Remove the rest of the JMX Trans logic by @scholzj in #9492
• ISSUE-9231 Makes Kafka Exporter offset.show-all configurable by @ilkerkocatepe in #9494
• Remove unused methods by @katheris in #9495
• [ST] Create NamespaceManager for handling namespaces in the tests by @im-konge in #9496
• Fix typo in import control by @fvaleri in #9500
• Use additionalProperties instead of x-kubernetes-preserve-unknown-fields for Map<String, String> fields by @scholzj in #9508
• Set UTO as default standalone deployment by @fvaleri in #9514
• Add new CRD annotation to indicate Strimzi version when a property was added by @scholzj in #9515
• [ST] Enable connector autoRestart test by @jankalinic in #9507
• [ST] Fix detecting kind in systemtests by @jankalinic in #9504
• Remove Cruise Control's cluster.configs.file and related code by @fvaleri in #9499
• Add kind, apiVersion and metadata to our CRDs by @scholzj in #9516
• Split the classes from the io.strimzi.api.kafka.model package to multiple sub-packages by @ShubhamRwt in #9207
• [ST] Update upgrade/downgrade files after 0.39.0 release and enable KRaftStrimziDowngradeST by @im-konge in #9506
• refactor: Rename *Resources.*StatefulSetName and deploymentName methods by @Anefu in #9520
• Correct CRD operator delete predicate, increase test timeout by @MikeEdgar in #871...

0.40.0-rc1

⚠️ Important: From Strimzi 0.40 on, we support only Kubernetes 1.23 and newer. Kubernetes versions 1.21 and 1.22 are no longer supported.

Main changes since 0.39.0

This release contains the following new features and improvements:

• Add support for Apache Kafka 3.7.0. Remove support for Apache Kafka 3.5.0, 3.5.1, and 3.5.2.
• The UseKRaft feature gate moves to beta stage and is enabled by default. If needed, UseKRaft can be disabled in the feature gates configuration in the Cluster Operator.
• Add support for ZooKeeper to KRaft migration by enabling the users to move from using ZooKeeper to store metadata to KRaft.
• Add support for moving from dedicated controller-only KRaft nodes to mixed KRaft nodes
• Added support for Kafka Exporter offset.show-all parameter
• Prevent removal of the broker process role from KRaft mixed-nodes that have assigned partition-replicas
• Improve broker scale-down prevention to continue in reconciliation when scale-down cannot be executed
• Added support for Tiered Storage by enabling the configuration of custom storage plugins through the Kafka custom resource.
• Update HTTP bridge to the latest 0.28.0 release

All changes can be found under the 0.40.0 milestone.

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

• From Strimzi 0.40.0 on, we support only Kubernetes 1.23 and newer. Kubernetes 1.21 and 1.22 are not supported anymore.
• #9508 fixes the Strimzi CRDs and their definitions of labels and annotations. This change brings our CRDs in-sync with the Kubernetes APIs. After this fix, the label and annotation definitions in our CRDs (for example in the template sections) cannot contain integer values anymore and have to always use string values. If your custom resources use an integer value, for example:

  template:
    apiService:
      metadata:
        annotations:
          discovery.myapigateway.io/port: 8080
  

  You might get an error similar to this when applying the resource:

  spec.template.apiService.metadata.annotations.discovery.myapigateway.io/port: Invalid value: "integer": spec.template.apiService.metadata.annotations.discovery.myapigateway.io/port in body must be of type string: "integer"
  

  To fix the issue, just use a string value instead of an integer:

  template:
    apiService:
      metadata:
        annotations:
          discovery.myapigateway.io/port: "8080"
  

• Support for the JmxTrans component is now completely removed. If you are upgrading from Strimzi 0.34 or earlier and have JmxTrans enabled in .spec.jmxTrans of the Kafka custom resource, you should disable it before the upgrade or delete it manually after the upgrade is complete.
• The api module was refactored and classes were moved to new packages.
• Strimzi Drain Cleaner 1.1.0 (included in the Strimzi 0.40.0 installation files) changes the way it handles Kubernetes eviction requests. It denies them instead of allowing them. This new behavior does not require the PodDisruptionBudget to be set to maxUnavailable: 0. We expect this to improve the compatibility with various tools used for scaling Kubernetes clusters such as Karpenter. If you observe any problems with your toolchain or just want to stick with the previous behavior, you can use the STRIMZI_DENY_EVICTION environment variable and set it to false to switch back to the old (legacy) mode.

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-1213/</url>
    </repository>
  </repositories>

Upgrading from Strimzi 0.39.0

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:2228d89b53e3524e69d1bcf5c2cd373884ce696d9005389a6c78dad23310e837
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:2c143eb10b66037ef877311eb767457e4b877d5ff2c47d393c76babec155caff
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:e2b9f2835498831bbf30ac2d651de143d57088bcb23943101b066e941db92aca
Apache Kafka 3.7.0	quay.io/strimzi/kafka@sha256:c491a95f9b9b58f406461faf222ef612ad8d2f4d7b53f7f3645b20c99d7d1583
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:73deb1af0d93e9fa8955a5a412d0e7138384bdc80e7574e815d21796e446b636
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:3fb4ace22589fcf8d3f01b74c37b10b32d87e15d103ea59e0933b61c4e46ff4a
Maven Builder	quay.io/strimzi/maven-builder@sha256:d02a9b48c77a44eeab6426c9af4adf75405217994bcb01ce0196e616041350d8

All changes

• Bump main branch to 0.40.0-SNAPSHOT by @scholzj in #9459
• docs(node pools): updates to node pools content to reflect move to beta by @PaulRMellor in #9460
• docs(upgrade): note on topic operator cleanup when upgrading with unidirectional mode by @PaulRMellor in #9464
• Use separate logger for Jetty in Topic Operator by @scholzj in #9468
• Update Cruise Control to 2.5.133 and Kaniko to 1.19.1 by @scholzj in #9472
• Fix the UTO upgrade issue reported in #9470. by @fvaleri in #9474
• Add UnlockExperimentalVMOptions to priority JVM options by @mikekamornikov in #9476
• Add Strimzi 0.39.0 to the main branch by @scholzj in #9479
• Renaming context handler variable on creation by @ppatierno in #9478
• Update supported Kubernetes version to 1.23+ by @scholzj in #9473
• docs(tls): updates the tls communication overview to accommodate kraft by @PaulRMellor in #9481
• Refactor cert handling by @katheris in #9463
• docs(drain cleaner): considerations when using anti-affinity by @PaulRMellor in #9482
• Fix NullPointerException From Missing listenerConfig by @MarkintoshZ in #9489
• Enable TO in KRaft examples by @scholzj in #9490
• Remove the rest of the JMX Trans logic by @scholzj in #9492
• ISSUE-9231 Makes Kafka Exporter offset.show-all configurable by @ilkerkocatepe in #9494
• Remove unused methods by @katheris in #9495
• [ST] Create NamespaceManager for handling namespaces in the tests by @im-konge in #9496
• Fix typo in import control by @fvaleri in #9500
• Use additionalProperties instead of x-kubernetes-preserve-unknown-fields for Map<String, String> fields by @scholzj in #9508
• Set UTO as default standalone deployment by @fvaleri in #9514
• Add new CRD annotation to indicate Strimzi version when a property was added by @scholzj in #9515
• [ST] Enable connector autoRestart test by @jankalinic in #9507
• [ST] Fix detecting kind in systemtests by @jankalinic in #9504
• Remove Cruise Control's cluster.configs.file and related code by @fvaleri in #9499
• Add kind, apiVersion and metadata to our CRDs by @scholzj in #9516
• Split the classes from the io.strimzi.api.kafka.model package to multiple sub-packages by @ShubhamRwt in #9207
• [ST] Update upgrade/downgrade files after 0.39.0 release and enable KRaftStrimziDowngradeST by @im-konge in #9506
• refactor: Rename *Resources.*StatefulSetName and deploymentName methods by @Anefu in #9520
• Correct CRD operator delete predicate, increase test timeout by @MikeEdgar in #8715
• Remove support for Kafka 3.5.0 and 3.5.1 by @scholzj in #9526
• [ST] Upgrade/downgrade - specify file path for Kafka in the YAML files by @im-konge in #9529
• Update Fabric8 to 6.10.0 by @sc...

0.39.0

⚠️ Important: Strimzi 0.39 is the last minor release with support for Kubernetes 1.21 and 1.22. From Strimzi 0.40 on, only Kubernetes 1.23 and newer will be supported.

Main changes since 0.38.0

This release contains the following new features and improvements:

• Add support for Apache Kafka 3.5.2 and 3.6.1
• The StableConnectIdentities feature gate moves to GA stage and is now permanently enabled without the possibility to disable it.
  All Connect and Mirror Maker 2 operands will now use StrimziPodSets.
• The KafkaNodePools feature gate moves to the beta stage and is enabled by default.
  If needed, KafkaNodePools can be disabled in the feature gates configuration in the Cluster Operator.
• The UnidirectionalTopicOperator feature gate moves to the beta stage and is enabled by default.
  If needed, UnidirectionalTopicOperator can be disabled in the feature gates configuration in the Cluster Operator.
• Improved Kafka Connect metrics and dashboard example files
• Allow specifying and managing KRaft metadata version
• Add support for KRaft to KRaft upgrades (Apache Kafka upgrades for the KRaft-based clusters)
• Improved Kafka Mirror Maker 2 dashboard example file
• Support for rolling updates of KRaft controller nodes

All changes can be found under the 0.39.0 milestone.

Upgrading from Strimzi 0.38.0

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:50b49f9b5e554cca517fc2794e11319d5aaba1676494b285baa3a74fc79eb501
Apache Kafka 3.5.0	quay.io/strimzi/kafka@sha256:49b7530ada1175750ad5a706e545ba3594d85e1e3a90f98b0200a73fa9875057
Apache Kafka 3.5.1	quay.io/strimzi/kafka@sha256:84691b3afb67b312400e01572ff08b64c1e1b1d32a4276e0c21bba10c71c36fe
Apache Kafka 3.5.2	quay.io/strimzi/kafka@sha256:53b960411e852f5cb182ecc5d395a3562865f83e15e6251f3a9af0eb413feeed
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:dd1706f36031c96dfcd0da7b3f804168e5f076220caa302973455fdcd76bd03e
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:2badc65532b483bba6c1f6a8b0c9895e993ce24e9ebd3cd953d0d17fbe36d27a
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:13838889cc20a3a382ea64e749cad94f997c0b928840588f2d1befcf19247bea
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:723b7add2473e73c45c81361e1708af4971c321b0391c1298a0557fb8ca4f7f6
Maven Builder	quay.io/strimzi/maven-builder@sha256:6ce3c16284379d5db9e42a6f3e2b765c981091164a28fdd6bf927b6c5d4ab557

0.39.0-rc2

⚠️ Important: Strimzi 0.39 is the last minor release with support for Kubernetes 1.21 and 1.22. From Strimzi 0.40 on, only Kubernetes 1.23 and newer will be supported.

Main changes since 0.39.0-rc1

• Updated Kaniko and Cruise Control dependencies
• Updated documentation
• Improve Unidirectional Topic Operator log levels and handling of existing topics after rolling updates

All changes can be found under the 0.39.0 milestone.

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-1207/</url>
    </repository>
  </repositories>

Upgrading from Strimzi 0.38.0

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:50b49f9b5e554cca517fc2794e11319d5aaba1676494b285baa3a74fc79eb501
Apache Kafka 3.5.0	quay.io/strimzi/kafka@sha256:49b7530ada1175750ad5a706e545ba3594d85e1e3a90f98b0200a73fa9875057
Apache Kafka 3.5.1	quay.io/strimzi/kafka@sha256:84691b3afb67b312400e01572ff08b64c1e1b1d32a4276e0c21bba10c71c36fe
Apache Kafka 3.5.2	quay.io/strimzi/kafka@sha256:53b960411e852f5cb182ecc5d395a3562865f83e15e6251f3a9af0eb413feeed
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:dd1706f36031c96dfcd0da7b3f804168e5f076220caa302973455fdcd76bd03e
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:2badc65532b483bba6c1f6a8b0c9895e993ce24e9ebd3cd953d0d17fbe36d27a
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:13838889cc20a3a382ea64e749cad94f997c0b928840588f2d1befcf19247bea
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:723b7add2473e73c45c81361e1708af4971c321b0391c1298a0557fb8ca4f7f6
Maven Builder	quay.io/strimzi/maven-builder@sha256:6ce3c16284379d5db9e42a6f3e2b765c981091164a28fdd6bf927b6c5d4ab557

0.39.0-rc1

⚠️ Important: Strimzi 0.39 is the last minor release with support for Kubernetes 1.21 and 1.22. From Strimzi 0.40 on, only Kubernetes 1.23 and newer will be supported.

Main changes since 0.38.0

This release contains the following new features and improvements:

• Add support for Apache Kafka 3.5.2 and 3.6.1
• The StableConnectIdentities feature gate moves to GA stage and is now permanently enabled without the possibility to disable it.
  All Connect and Mirror Maker 2 operands will now use StrimziPodSets.
• The KafkaNodePools feature gate moves to the beta stage and is enabled by default.
  If needed, KafkaNodePools can be disabled in the feature gates configuration in the Cluster Operator.
• The UnidirectionalTopicOperator feature gate moves to the beta stage and is enabled by default.
  If needed, UnidirectionalTopicOperator can be disabled in the feature gates configuration in the Cluster Operator.
• Improved Kafka Connect metrics and dashboard example files
• Allow specifying and managing KRaft metadata version
• Add support for KRaft to KRaft upgrades (Apache Kafka upgrades for the KRaft-based clusters)
• Improved Kafka Mirror Maker 2 dashboard example file
• Support for rolling updates of KRaft controller nodes

All changes can be found under the 0.39.0 milestone.

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-1206/</url>
    </repository>
  </repositories>

Upgrading from Strimzi 0.38.0

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:59000793d272a703caf931ebf0cb38e6fdfbc3b2f2876e666d738ae045709c8d
Apache Kafka 3.5.0	quay.io/strimzi/kafka@sha256:67f22ed518e8a27436f8d144ff36c6db2df6e5d87b4078a96204dd139e01781e
Apache Kafka 3.5.1	quay.io/strimzi/kafka@sha256:ea7b0c6b923dfa2609fcb032c1b15dc46190dd558094ec404fd45540557f7149
Apache Kafka 3.5.2	quay.io/strimzi/kafka@sha256:7d80f000657949c80f2de3716351bab0607cbacf12114e48e2ba9bd5058ef935
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:9a60d84b0c2d9c8cb55d442b89d9d0b1086d59ac7bb0dc6c10430406463860ed
Apache Kafka 3.6.1	quay.io/strimzi/kafka@sha256:eca7b205421c73169bdfbb39fd16732e9df785de164d5f70126fbee547853fd1
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:13838889cc20a3a382ea64e749cad94f997c0b928840588f2d1befcf19247bea
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:a02bcab834905b6ae852382718c8fbefea804eef895a16cb81861efc20507a8e
Maven Builder	quay.io/strimzi/maven-builder@sha256:82c039f789934dacd3b767a5991d97c1ce6ab1ab117dbdc6a12b41c2f9c97247

0.38.0

⚠️ Important: Direct upgrade from Strimzi 0.22 or earlier is not supported anymore!

Main changes since 0.37

This release contains the following new features and improvements:

• Add support for Apache Kafka 3.6.0 and drop support for 3.4.0 and 3.4.1
• Sign containers using cosign
• Generate and publish Software Bill of Materials (SBOMs) of Strimzi containers
• Add support for stopping connectors according to Strimzi Proposal #54
• Allow manual rolling of Kafka Connect and Kafka Mirror Maker 2 pods using the strimzi.io/manual-rolling-update annotation (supported only when StableConnectIdentities feature gate is enabled)
• Make sure brokers are empty before scaling them down
• Add support for pausing reconciliations to the Unidirectional Topic Operator
• Allow running ZooKeeper and KRaft-based Apache Kafka clusters in parallel when the +UseKRaft feature gate is enabled
• Add support for metrics to the Unidirectional Topic Operator
• Added the includeAcceptHeader option to OAuth client and listener authentication configuration and to keycloak authorization. If set to false it turns off sending of Accept header when communicating with OAuth / OIDC authorization server. This feature is enabled by the updated Strimzi Kafka OAuth library (0.14.0).
• Update HTTP bridge to latest 0.27.0 release

It also has several notable changes, deprecations, and removals:

• The Kafka.KafkaStatus.ListenerStatus.type property has been deprecated for a long time, and now we do not use it anymore.
  The current plan is to completely remove this property in the next schema version.
  If needed, you can use the Kafka.KafkaStatus.ListenerStatus.name property, which has the same value.
• Added strimzi.io/kraft annotation to be applied on Kafka custom resource, together with the +UseKRaft feature gate enabled, to declare a ZooKeeper or KRaft based cluster.
  • if enabled the Kafka resource defines a KRaft-based cluster.
  • if disabled, missing or any other value, the operator handle the Kafka resource as a ZooKeeper-based cluster.
• The io.strimzi.kafka.EnvVarConfigProvider configuration provider is now deprecated and will be removed in Strimzi 0.42. Users should migrate to Kafka's implementation, org.apache.kafka.common.config.provider.EnvVarConfigProvider, which is a drop-in replacement.
  For example:

  config:
    # ...
    config.providers: env
    config.providers.env.class: io.strimzi.kafka.EnvVarConfigProvider
    # ...

  becomes

  config:
    # ...
    config.providers: env
    config.providers.env.class: org.apache.kafka.common.config.provider.EnvVarConfigProvider
    # ...
  

All changes can be found under the 0.38.0 milestone.

Upgrading from Strimzi 0.37.0

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:aee45bbe439335e45a0423e6565bae0d0727d85c7b807812949bfa127d467fe6
Apache Kafka 3.5.0	quay.io/strimzi/kafka@sha256:50e24c797455f9cdbb3cdde8e4f26bb8e1f0503469456da5d179017fd3e03ffe
Apache Kafka 3.5.1	quay.io/strimzi/kafka@sha256:0cc01438e8596643407b6b8ff05fafcea7ef54fa9410d4ae2492a9dbf41118b1
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:20d451fb32ec82eab3c16891198ace46bb9b9193f1f5511bb60ce249080dd7d4
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:13838889cc20a3a382ea64e749cad94f997c0b928840588f2d1befcf19247bea
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:4fe7a3f3f78e93369284a5ab456873c911230926ca071d1d88167e63d8ce376c
Maven Builder	quay.io/strimzi/maven-builder@sha256:922d91dab9e2b8e14b6db25d8b48d7f4e3521bedd435468cc22039599ac4f888

0.38.0-rc1

⚠️ Important: Direct upgrade from Strimzi 0.22 or earlier is not supported anymore!

Main changes since 0.37

This release contains the following new features and improvements:

• Add support for Apache Kafka 3.6.0 and drop support for 3.4.0 and 3.4.1
• Sign containers using cosign
• Generate and publish Software Bill of Materials (SBOMs) of Strimzi containers
• Add support for stopping connectors according to Strimzi Proposal #54
• Allow manual rolling of Kafka Connect and Kafka Mirror Maker 2 pods using the strimzi.io/manual-rolling-update annotation (supported only when StableConnectIdentities feature gate is enabled)
• Make sure brokers are empty before scaling them down
• Add support for pausing reconciliations to the Unidirectional Topic Operator
• Allow running ZooKeeper and KRaft-based Apache Kafka clusters in parallel when the +UseKRaft feature gate is enabled
• Add support for metrics to the Unidirectional Topic Operator
• Added the includeAcceptHeader option to OAuth client and listener authentication configuration and to keycloak authorization. If set to false it turns off sending of Accept header when communicating with OAuth / OIDC authorization server. This feature is enabled by the updated Strimzi Kafka OAuth library (0.14.0).
• Update HTTP bridge to latest 0.27.0 release

It also has several notable changes, deprecations, and removals:

• The Kafka.KafkaStatus.ListenerStatus.type property has been deprecated for a long time, and now we do not use it anymore.
  The current plan is to completely remove this property in the next schema version.
  If needed, you can use the Kafka.KafkaStatus.ListenerStatus.name property, which has the same value.
• Added strimzi.io/kraft annotation to be applied on Kafka custom resource, together with the +UseKRaft feature gate enabled, to declare a ZooKeeper or KRaft based cluster.
  • if enabled the Kafka resource defines a KRaft-based cluster.
  • if disabled, missing or any other value, the operator handle the Kafka resource as a ZooKeeper-based cluster.
• The io.strimzi.kafka.EnvVarConfigProvider configuration provider is now deprecated and will be removed in Strimzi 0.42. Users should migrate to Kafka's implementation, org.apache.kafka.common.config.provider.EnvVarConfigProvider, which is a drop-in replacement.
  For example:

  config:
    # ...
    config.providers: env
    config.providers.env.class: io.strimzi.kafka.EnvVarConfigProvider
    # ...

  becomes

  config:
    # ...
    config.providers: env
    config.providers.env.class: org.apache.kafka.common.config.provider.EnvVarConfigProvider
    # ...
  

All changes can be found under the 0.38.0 milestone.

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-1205/</url>
    </repository>
  </repositories>

Upgrading from Strimzi 0.37.0

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:

Name	Image
Operators	quay.io/strimzi/operator@sha256:aee45bbe439335e45a0423e6565bae0d0727d85c7b807812949bfa127d467fe6
Apache Kafka 3.5.0	quay.io/strimzi/kafka@sha256:50e24c797455f9cdbb3cdde8e4f26bb8e1f0503469456da5d179017fd3e03ffe
Apache Kafka 3.5.1	quay.io/strimzi/kafka@sha256:0cc01438e8596643407b6b8ff05fafcea7ef54fa9410d4ae2492a9dbf41118b1
Apache Kafka 3.6.0	quay.io/strimzi/kafka@sha256:20d451fb32ec82eab3c16891198ace46bb9b9193f1f5511bb60ce249080dd7d4
Strimzi Bridge	quay.io/strimzi/kafka-bridge@sha256:13838889cc20a3a382ea64e749cad94f997c0b928840588f2d1befcf19247bea
Kaniko executor	quay.io/strimzi/kaniko-executor@sha256:4fe7a3f3f78e93369284a5ab456873c911230926ca071d1d88167e63d8ce376c
Maven Builder	quay.io/strimzi/maven-builder@sha256:922d91dab9e2b8e14b6db25d8b48d7f4e3521bedd435468cc22039599ac4f888