From f479dd6354f2d09fa3519c091dd50c0fb6399db7 Mon Sep 17 00:00:00 2001
From: Razvan-Daniel Mihai <84674+razvan@users.noreply.github.com>
Date: Wed, 16 Sep 2026 11:07:08 +0200
Subject: [PATCH] chore(kafka): Update major/minor versions for 26.11.0

---
 CHANGELOG.md                                        |  6 ++++++
 docs/modules/kafka/partials/supported-versions.adoc | 10 ++++------
 rust/operator-binary/src/controller/validate.rs     |  2 +-
 rust/operator-binary/src/crd/mod.rs                 |  6 +++---
 tests/test-definition.yaml                          |  6 ++----
 5 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 454e23a6..a76b1709 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+## Added
+
+- Support for Kafka 4.3.1 ([#1022]).
+
 ### Changed
 
 - The dynamic KRaft quorum created by the operator is now scaled automatically. Previously,
@@ -56,6 +60,7 @@ All notable changes to this project will be documented in this file.
   shipped in the same product image as `kafka` since #527, so the dedicated container/image was
   no longer needed). The `kcat-prober` value is no longer accepted in a broker's
   `logging.containers` CRD field ([#1010]).
+- Support for Kafka 4.1.1 and 4.2.1 ([#1022])
 
 [#985]: https://github.com/stackabletech/kafka-operator/pull/985
 [#990]: https://github.com/stackabletech/kafka-operator/pull/990
@@ -66,6 +71,7 @@ All notable changes to this project will be documented in this file.
 [#1011]: https://github.com/stackabletech/kafka-operator/pull/1011
 [#1014]: https://github.com/stackabletech/kafka-operator/pull/1014
 [#1017]: https://github.com/stackabletech/kafka-operator/pull/1017
+[#1022]: https://github.com/stackabletech/kafka-operator/pull/1022
 
 ## [26.7.0] - 2026-07-21
 
diff --git a/docs/modules/kafka/partials/supported-versions.adoc b/docs/modules/kafka/partials/supported-versions.adoc
index 5a962cb4..4ca1c99b 100644
--- a/docs/modules/kafka/partials/supported-versions.adoc
+++ b/docs/modules/kafka/partials/supported-versions.adoc
@@ -2,12 +2,10 @@
 // This is a separate file, since it is used by both the direct Kafka documentation, and the overarching
 // Stackable Platform documentation.
 
-* 4.2.1 (experimental, deprecated) - Requires KRaft, please read on the xref:kafka:usage-guide/kraft-controller.adoc[Kraft migration guide].
-* 4.1.1 (experimental, deprecated) - Requires KRaft, please read on the xref:kafka:usage-guide/kraft-controller.adoc[Kraft migration guide].
+* 4.3.1
+* 4.2.1
 * 3.9.2 (LTS)
-* 3.9.1 (deprecated)
 
-Support for clusters running in Kraft mode (which includes Apache Kafka >= 4.x) is experimental due to the following known issues:
+Starting with Apache Kafka >=4.x, the quorum manager has been changed from Apache Zookeeper to the built in KRaft.
 
-* Kerberos authentication is not tested yet.
-* Service exposition is not definitive.
+If you are running an older Kafka version and plan to upgrade, head on to the xref:kafka:usage-guide/kraft-controller.adoc[Kraft migration guide] for details on how to do so.
diff --git a/rust/operator-binary/src/controller/validate.rs b/rust/operator-binary/src/controller/validate.rs
index c41d31a8..9462b284 100644
--- a/rust/operator-binary/src/controller/validate.rs
+++ b/rust/operator-binary/src/controller/validate.rs
@@ -624,7 +624,7 @@ mod tests {
               uid: 12345678-1234-1234-1234-123456789012
             spec:
               image:
-                productVersion: 4.1.1
+                productVersion: 4.3.1
               brokers:
                 roleGroups:
                   default:
diff --git a/rust/operator-binary/src/crd/mod.rs b/rust/operator-binary/src/crd/mod.rs
index 3402151f..900d0bb4 100644
--- a/rust/operator-binary/src/crd/mod.rs
+++ b/rust/operator-binary/src/crd/mod.rs
@@ -594,13 +594,13 @@ mod tests {
         Ok(MetadataManager::ZooKeeper)
     )]
     #[case("3.9.2", Some(MetadataManager::KRaft), Ok(MetadataManager::KRaft))]
-    #[case("4.1.1", None, Ok(MetadataManager::KRaft))]
+    #[case("4.3.1", None, Ok(MetadataManager::KRaft))]
     #[case(
-        "4.1.1",
+        "4.3.1",
         Some(MetadataManager::ZooKeeper),
         Err(Error::Kafka4RequiresKraftMetadataManager)
     )]
-    #[case("4.1.1", Some(MetadataManager::KRaft), Ok(MetadataManager::KRaft))]
+    #[case("4.3.1", Some(MetadataManager::KRaft), Ok(MetadataManager::KRaft))]
     fn test_effective_metadata_manager(
         #[case] product_version: &str,
         #[case] metadata_manager: Option<MetadataManager>,
diff --git a/tests/test-definition.yaml b/tests/test-definition.yaml
index 9b47243a..6385f7ed 100644
--- a/tests/test-definition.yaml
+++ b/tests/test-definition.yaml
@@ -7,11 +7,9 @@ dimensions:
   - name: kafka-kraft
     values:
       - 3.9.2
-      - 4.1.1
-      - 4.2.1
+      - 4.3.1
   - name: kafka
     values:
-      - 3.9.1
       - 3.9.2
       # Alternatively, if you want to use a custom image, append a comma and the full image name to the product version
       # as in the example below.
@@ -37,7 +35,7 @@ dimensions:
       - 3.9.2
   - name: upgrade_new
     values:
-      - 4.2.1
+      - 4.3.1
   - name: use-client-tls
     values:
       - "true"