Expend feature gates support to all Strimzi operators

CHANGELOG.md

@@ -6,6 +6,7 @@
   To use KRaft (ZooKeeper-less Apache Kafka), you still need to use the `strimzi.io/kraft: enabled` annotation on the `Kafka` custom resources or migrate from an existing ZooKeeper-based cluster using the `strimzi.io/kraft: migration` annotation.
 * Update the base image used by Strimzi containers from UBI8 to UBI9
 * Enhance `KafkaBridge` resource with consumer inactivity timeout and HTTP consumer/producer enablement.
+* Add support for feature gates to User and Topic Operators
 
 ## 0.41.0
 

cluster-operator/src/main/java/io/strimzi/operator/cluster/ClusterOperatorConfig.java

@@ -14,6 +14,7 @@
 import io.strimzi.operator.common.Util;
 import io.strimzi.operator.common.config.ConfigParameter;
 import io.strimzi.operator.common.config.ConfigParameterParser;
+import io.strimzi.operator.common.featuregates.FeatureGates;
 import io.strimzi.operator.common.model.Labels;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -32,6 +33,7 @@
 import static io.strimzi.operator.common.config.ConfigParameterParser.LONG;
 import static io.strimzi.operator.common.config.ConfigParameterParser.NAMESPACE_SET;
 import static io.strimzi.operator.common.config.ConfigParameterParser.STRING;
+import static io.strimzi.operator.common.config.ConfigParameterParser.parseFeatureGates;
 
 /**
  * Cluster Operator configuration
@@ -391,10 +393,6 @@ private static KafkaVersion.Lookup parseKafkaVersions(String kafkaImages, String
         }
     }
 
-    static ConfigParameterParser<FeatureGates> parseFeatureGates() {
-        return FeatureGates::new;
-    }
-
     static ConfigParameterParser<ImagePullPolicy> parseImagePullPolicy() {
         return imagePullPolicyEnvVar -> {
             ImagePullPolicy imagePullPolicy = null;

cluster-operator/src/main/java/io/strimzi/operator/cluster/model/EntityOperator.java

@@ -24,6 +24,7 @@
 import io.strimzi.api.kafka.model.kafka.KafkaResources;
 import io.strimzi.api.kafka.model.kafka.entityoperator.EntityOperatorSpec;
 import io.strimzi.api.kafka.model.kafka.entityoperator.EntityOperatorTemplate;
+import io.strimzi.operator.cluster.ClusterOperatorConfig;
 import io.strimzi.operator.cluster.model.securityprofiles.PodSecurityProviderContextImpl;
 import io.strimzi.operator.common.Reconciliation;
 import io.strimzi.operator.common.Util;
@@ -105,20 +106,22 @@ protected EntityOperator(Reconciliation reconciliation, HasMetadata resource, Sh
      * @param reconciliation                The reconciliation marker
      * @param kafkaAssembly                 Desired resource with cluster configuration containing the Entity Operator one
      * @param sharedEnvironmentProvider     Shared environment provider
+     * @param config                        Cluster Operator configuration
      *
      * @return Entity Operator instance, null if not configured in the ConfigMap
      */
     public static EntityOperator fromCrd(Reconciliation reconciliation,
                                          Kafka kafkaAssembly,
-                                         SharedEnvironmentProvider sharedEnvironmentProvider) {
+                                         SharedEnvironmentProvider sharedEnvironmentProvider,
+                                         ClusterOperatorConfig config) {
         EntityOperatorSpec entityOperatorSpec = kafkaAssembly.getSpec().getEntityOperator();
 
         if (entityOperatorSpec != null
                 && (entityOperatorSpec.getUserOperator() != null || entityOperatorSpec.getTopicOperator() != null)) {
             EntityOperator result = new EntityOperator(reconciliation, kafkaAssembly, sharedEnvironmentProvider);
 
-            EntityTopicOperator topicOperator = EntityTopicOperator.fromCrd(reconciliation, kafkaAssembly, sharedEnvironmentProvider);
-            EntityUserOperator userOperator = EntityUserOperator.fromCrd(reconciliation, kafkaAssembly, sharedEnvironmentProvider);
+            EntityTopicOperator topicOperator = EntityTopicOperator.fromCrd(reconciliation, kafkaAssembly, sharedEnvironmentProvider, config);
+            EntityUserOperator userOperator = EntityUserOperator.fromCrd(reconciliation, kafkaAssembly, sharedEnvironmentProvider, config);
 
             result.topicOperator = topicOperator;
             result.cruiseControlEnabled = kafkaAssembly.getSpec().getCruiseControl() != null;

cluster-operator/src/main/java/io/strimzi/operator/cluster/model/EntityTopicOperator.java

@@ -83,6 +83,7 @@ public class EntityTopicOperator extends AbstractModel implements SupportsLoggin
     /* test */ String kafkaBootstrapServers;
     private boolean cruiseControlEnabled;
     private boolean rackAwarenessEnabled;
+    private String featureGatesEnvVarValue;
 
     private String watchedNamespace;
     /* test */ int reconciliationIntervalMs;
@@ -110,15 +111,18 @@ protected EntityTopicOperator(Reconciliation reconciliation, HasMetadata resourc
     /**
      * Create an Entity Topic Operator from given desired resource. When Topic Operator (Or Entity Operator) are not
      * enabled, it returns null.
-     * @param reconciliation The reconciliation
-     * @param kafkaAssembly desired resource with cluster configuration containing the Entity Topic Operator one
-     *                      @param sharedEnvironmentProvider Shared environment provider
+     *
+     * @param reconciliation                The reconciliation marker
+     * @param kafkaAssembly                 Desired resource with cluster configuration containing the Entity Topic Operator one
+     * @param sharedEnvironmentProvider     Shared environment provider
+     * @param config                        Cluster Operator configuration
      *
      * @return Entity Topic Operator instance, null if not configured
      */
     public static EntityTopicOperator fromCrd(Reconciliation reconciliation,
                                               Kafka kafkaAssembly,
-                                              SharedEnvironmentProvider sharedEnvironmentProvider) {
+                                              SharedEnvironmentProvider sharedEnvironmentProvider,
+                                              ClusterOperatorConfig config) {
         if (kafkaAssembly.getSpec().getEntityOperator() != null
                 && kafkaAssembly.getSpec().getEntityOperator().getTopicOperator() != null) {
             EntityTopicOperatorSpec topicOperatorSpec = kafkaAssembly.getSpec().getEntityOperator().getTopicOperator();
@@ -145,6 +149,7 @@ public static EntityTopicOperator fromCrd(Reconciliation reconciliation,
 
             result.cruiseControlEnabled = kafkaAssembly.getSpec().getCruiseControl() != null;
             result.rackAwarenessEnabled = result.cruiseControlEnabled && kafkaAssembly.getSpec().getKafka().getRack() != null;
+            result.featureGatesEnvVarValue = config.featureGates().toEnvironmentVariable();
 
             return result;
         } else {
@@ -180,7 +185,12 @@ protected List<EnvVar> getEnvVars() {
         varList.add(ContainerUtils.createEnvVar(ENV_VAR_SECURITY_PROTOCOL, EntityTopicOperatorSpec.DEFAULT_SECURITY_PROTOCOL));
         varList.add(ContainerUtils.createEnvVar(ENV_VAR_TLS_ENABLED, Boolean.toString(true)));
         varList.add(ContainerUtils.createEnvVar(ENV_VAR_STRIMZI_GC_LOG_ENABLED, Boolean.toString(gcLoggingEnabled)));
-
+
+        // Add feature gates configuration if not empty
+        if (featureGatesEnvVarValue != null && !featureGatesEnvVarValue.isEmpty()) {
+            varList.add(ContainerUtils.createEnvVar(ClusterOperatorConfig.FEATURE_GATES.key(), featureGatesEnvVarValue));
+        }
+
         // Add environment variables required for Cruise Control integration
         if (this.cruiseControlEnabled) {
             varList.add(ContainerUtils.createEnvVar(ENV_VAR_CRUISE_CONTROL_ENABLED, Boolean.toString(cruiseControlEnabled)));

cluster-operator/src/main/java/io/strimzi/operator/cluster/model/EntityUserOperator.java

@@ -77,6 +77,7 @@ public class EntityUserOperator extends AbstractModel implements SupportsLogging
     /* test */ int clientsCaValidityDays;
     /* test */ int clientsCaRenewalDays;
     private ResourceTemplate templateRoleBinding;
+    private String featureGatesEnvVarValue;
 
     private boolean aclsAdminApiSupported = false;
     private List<String> maintenanceWindows;
@@ -107,10 +108,14 @@ protected EntityUserOperator(Reconciliation reconciliation, HasMetadata resource
      * @param reconciliation                The reconciliation
      * @param kafkaAssembly                 Desired resource with cluster configuration containing the Entity User Operator one
      * @param sharedEnvironmentProvider     Shared environment provider
+     * @param config                        Cluster Operator configuration
      *
      * @return Entity User Operator instance, null if not configured
      */
-    public static EntityUserOperator fromCrd(Reconciliation reconciliation, Kafka kafkaAssembly, SharedEnvironmentProvider sharedEnvironmentProvider) {
+    public static EntityUserOperator fromCrd(Reconciliation reconciliation,
+                                             Kafka kafkaAssembly,
+                                             SharedEnvironmentProvider sharedEnvironmentProvider,
+                                             ClusterOperatorConfig config) {
         if (kafkaAssembly.getSpec().getEntityOperator() != null
                 && kafkaAssembly.getSpec().getEntityOperator().getUserOperator() != null) {
             EntityUserOperatorSpec userOperatorSpec = kafkaAssembly.getSpec().getEntityOperator().getUserOperator();
@@ -131,6 +136,7 @@ public static EntityUserOperator fromCrd(Reconciliation reconciliation, Kafka ka
             result.resources = userOperatorSpec.getResources();
             result.readinessProbeOptions = ProbeUtils.extractReadinessProbeOptionsOrDefault(userOperatorSpec, EntityOperator.DEFAULT_HEALTHCHECK_OPTIONS);
             result.livenessProbeOptions = ProbeUtils.extractLivenessProbeOptionsOrDefault(userOperatorSpec, EntityOperator.DEFAULT_HEALTHCHECK_OPTIONS);
+            result.featureGatesEnvVarValue = config.featureGates().toEnvironmentVariable();
 
             if (kafkaAssembly.getSpec().getEntityOperator().getTemplate() != null)  {
                 result.templateRoleBinding = kafkaAssembly.getSpec().getEntityOperator().getTemplate().getUserOperatorRoleBinding();
@@ -196,6 +202,11 @@ protected List<EnvVar> getEnvVars() {
         varList.add(ContainerUtils.createEnvVar(ENV_VAR_ACLS_ADMIN_API_SUPPORTED, String.valueOf(aclsAdminApiSupported)));
         JvmOptionUtils.javaOptions(varList, jvmOptions);
 
+        // Add feature gates configuration if not empty
+        if (featureGatesEnvVarValue != null && !featureGatesEnvVarValue.isEmpty()) {
+            varList.add(ContainerUtils.createEnvVar(ClusterOperatorConfig.FEATURE_GATES.key(), featureGatesEnvVarValue));
+        }
+
         // Add shared environment variables used for all containers
         varList.addAll(sharedEnvironmentProvider.variables());
 

cluster-operator/src/main/java/io/strimzi/operator/cluster/operator/assembly/EntityOperatorReconciler.java

@@ -79,7 +79,7 @@ public EntityOperatorReconciler(
     ) {
         this.reconciliation = reconciliation;
         this.operationTimeoutMs = config.getOperationTimeoutMs();
-        this.entityOperator = EntityOperator.fromCrd(reconciliation, kafkaAssembly, supplier.sharedEnvironmentProvider);
+        this.entityOperator = EntityOperator.fromCrd(reconciliation, kafkaAssembly, supplier.sharedEnvironmentProvider, config);
         this.clusterCa = clusterCa;
         this.maintenanceWindows = kafkaAssembly.getSpec().getMaintenanceTimeWindows();
         this.isNetworkPolicyGeneration = config.isNetworkPolicyGeneration();

cluster-operator/src/test/java/io/strimzi/operator/cluster/ClusterOperatorConfigTest.java

@@ -10,6 +10,7 @@
 import io.strimzi.operator.cluster.model.ImagePullPolicy;
 import io.strimzi.operator.cluster.model.UnsupportedVersionException;
 import io.strimzi.operator.common.InvalidConfigurationException;
+import io.strimzi.operator.common.featuregates.FeatureGates;
 import io.strimzi.operator.common.model.Labels;
 import org.junit.jupiter.api.Test;
 
@@ -65,7 +66,7 @@ public void testDefaultConfig() {
         assertThat(config.getConnectBuildTimeoutMs(), is(Long.parseLong(ClusterOperatorConfig.CONNECT_BUILD_TIMEOUT_MS.defaultValue())));
         assertThat(config.getOperatorNamespace(), is("operator-namespace"));
         assertThat(config.getOperatorNamespaceLabels(), is(nullValue()));
-        assertThat(config.featureGates().continueOnManualRUFailureEnabled(), is(false));
+        assertThat(config.featureGates(), is(new FeatureGates("")));
         assertThat(config.isCreateClusterRoles(), is(false));
         assertThat(config.isNetworkPolicyGeneration(), is(true));
         assertThat(config.isPodSetReconciliationOnly(), is(false));
@@ -329,6 +330,8 @@ public void testInvalidOperatorNamespaceLabels() {
 
     @Test
     public void testInvalidFeatureGate() {
+        // We test that the configuration is really parsing the feature gates environment variable. We test it on
+        // non-existing feature gate instead of a real one so that we do not have to change it when the FGs are promoted
         Map<String, String> envVars = new HashMap<>(ClusterOperatorConfigTest.ENV_VARS);
         envVars.put(ClusterOperatorConfig.FEATURE_GATES.key(), "-NonExistingGate");