feat: Enable restart controller (#930)

* feat: Enable restart controller

* Update CHANGELOG.md

* Update CHANGELOG.md

Co-authored-by: Malte Sander <contact@maltesander.com>

* Improve assertion

---------

Co-authored-by: Malte Sander <contact@maltesander.com>

Author: sbernauer

CHANGELOG.md

@@ -9,6 +9,7 @@ All notable changes to this project will be documented in this file.
 - Support objectOverrides using `.spec.objectOverrides`.
   See [objectOverrides concepts page](https://docs.stackable.tech/home/nightly/concepts/overrides/#object-overrides) for details ([#927]).
 - Added experimental support for `4.1.1` ([#929])
+- Enable the [restart-controller](https://docs.stackable.tech/home/nightly/commons-operator/restarter/), so that the Pods are automatically restarted on config changes ([#930]).
 
 ### Changed
 
@@ -27,6 +28,7 @@ All notable changes to this project will be documented in this file.
 [#925]: https://github.com/stackabletech/kafka-operator/pull/925
 [#927]: https://github.com/stackabletech/kafka-operator/pull/927
 [#929]: https://github.com/stackabletech/kafka-operator/pull/929
+[#930]: https://github.com/stackabletech/kafka-operator/pull/930
 
 ## [25.11.0] - 2025-11-07
 

Cargo.lock

@@ -11,7 +11,7 @@ repository = "https://github.com/stackabletech/kafka-operator"
 
 [workspace.dependencies]
 product-config = { git = "https://github.com/stackabletech/product-config.git", tag = "0.8.0" }
-stackable-operator = { git = "https://github.com/stackabletech/operator-rs.git", tag = "stackable-operator-0.101.2", features = ["telemetry", "versioned"] }
+stackable-operator = { git = "https://github.com/stackabletech/operator-rs.git", tag = "stackable-operator-0.102.0", features = ["telemetry", "versioned"] }
 
 anyhow = "1.0"
 built = { version = "0.8", features = ["chrono", "git2"] }

Cargo.nix

@@ -463,6 +463,9 @@ pub async fn reconcile_kafka(
                     rolegroup: rolegroup_ref.clone(),
                 })?;
 
+            // Note: The StatefulSet needs to be applied after all ConfigMaps and Secrets it mounts
+            // to prevent unnecessary Pod restarts.
+            // See https://github.com/stackabletech/commons-operator/issues/111 for details.
             ss_cond_builder.add(
                 cluster_resources
                     .add(client, rg_statefulset)

Cargo.toml

@@ -17,6 +17,7 @@ use stackable_operator::{
         },
     },
     commons::product_image_selection::ResolvedProductImage,
+    constants::RESTART_CONTROLLER_ENABLED_LABEL,
     k8s_openapi::{
         DeepMerge,
         api::{
@@ -426,6 +427,7 @@ pub fn build_broker_rolegroup_statefulset(
     let metadata = ObjectMetaBuilder::new()
         .with_recommended_labels(recommended_object_labels)
         .context(MetadataBuildSnafu)?
+        .with_label(RESTART_CONTROLLER_ENABLED_LABEL.to_owned())
         .build();
 
     if let Some(listener_class) = merged_config.listener_class() {

crate-hashes.json

@@ -7,6 +7,9 @@ apiVersion: apps/v1
 kind: StatefulSet
 metadata:
   name: test-kafka-broker-default
+  generation: 1 # There should be no unneeded Pod restarts
+  labels:
+    restarter.stackable.tech/enabled: "true"
 spec:
   template:
     spec: