Feature flag: rolling-updates

Closes #36840

Signed-off-by: Pedro Ruivo <[email protected]>

Author: pruivo

common/src/main/java/org/keycloak/common/Profile.java

@@ -131,7 +131,9 @@ public enum Feature {
 
         USER_EVENT_METRICS("Collect metrics based on user events", Type.PREVIEW),
 
-        IPA_TUURA_FEDERATION("IPA-Tuura user federation provider", Type.EXPERIMENTAL)
+        IPA_TUURA_FEDERATION("IPA-Tuura user federation provider", Type.EXPERIMENTAL),
+
+        ROLLING_UPDATES("Rolling Updates", Type.PREVIEW),
         ;
 
         private final Type type;

docs/guides/operator/advanced-configuration.adoc

@@ -443,6 +443,12 @@ Check the https://kubernetes.io/docs/concepts/services-networking/network-polici
 
 The Keycloak Operator offers updates strategies to control how the Operator handles changes to the Keycloak CR.
 
+[CAUTION]
+====
+While on preview stage, the feature `rolling-updates` must be enabled.
+Otherwise, the {project_name} Operator will fail.
+====
+
 **Supported Updates Types:**
 
 Rolling Updates:: Update the StatefulSet in a rolling fashion, minimizing downtime (requires multiple replicas).
@@ -466,11 +472,14 @@ kind: Keycloak
 metadata:
   name: example-kc
 spec:
+  features:
+    enabled:
+      - rolling-updates # <1>
   update:
-    strategy: Recreate|<not set> # <1>
+    strategy: Recreate|<not set> # <2>
 ----
-
-<1> Set the desired update strategy here (Recreate in this example).
+<1> Enable preview feature `rolling-updates`.
+<2> Set the desired update strategy here (Recreate in this example).
 
 [%autowidth]
 .Possible field values

docs/guides/server/update-compatibility.adoc

@@ -9,7 +9,11 @@ preview="true"
 previewDiscussionLink="https://github.com/keycloak/keycloak/discussions/36785"
 >
 
-// TODO Link to discussion?
+[CAUTION]
+====
+While on preview stage, the feature `rolling-updates` must be enabled.
+Otherwise, the commands will fail.
+====
 
 The goal of this tool is to assist with modifying a {project_name} deployment, whether upgrading to a new version, enabling/disabling features, or changing configuration.
 The outcome will indicate whether a rolling upgrade is possible or if a recreate upgrade is required.
@@ -124,6 +128,10 @@ m|2
 m|3
 |Rolling Upgrade is not possible.
 The deployment must be shut down before applying the new configuration.
+
+m|4
+|Rolling Upgrade is not possible.
+The feature `rolling-updates` is disabled.
 |===
 
 </@tmpl.guide>

docs/guides/templates/kc.adoc

@@ -50,6 +50,6 @@ bin/kc.[sh|bat] bootstrap-admin ${parameters}
 <#macro updatecompatibility parameters>
 [source,bash]
 ----
-bin/kc.[sh|bat] update-compatibility ${parameters}
+bin/kc.[sh|bat] update-compatibility ${parameters} --features=rolling-updates
 ----
 </#macro>

operator/scripts/Dockerfile-custom-image

@@ -2,4 +2,4 @@ ARG IMAGE=keycloak
 ARG VERSION=latest
 FROM $IMAGE:$VERSION
 
-RUN /opt/keycloak/bin/kc.sh build --db=postgres --health-enabled=true
+RUN /opt/keycloak/bin/kc.sh build --db=postgres --health-enabled=true --features=rolling-updates

operator/src/test/java/org/keycloak/operator/testsuite/integration/UpgradeTest.java

@@ -17,6 +17,7 @@
 
 package org.keycloak.operator.testsuite.integration;
 
+import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
@@ -27,10 +28,11 @@
 import org.awaitility.Awaitility;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
+import org.keycloak.common.Profile;
 import org.keycloak.operator.crds.v2alpha1.deployment.Keycloak;
 import org.keycloak.operator.crds.v2alpha1.deployment.KeycloakStatusCondition;
 import org.keycloak.operator.crds.v2alpha1.deployment.ValueOrSecret;
-import org.keycloak.operator.crds.v2alpha1.deployment.spec.UnsupportedSpec;
+import org.keycloak.operator.crds.v2alpha1.deployment.spec.FeatureSpec;
 import org.keycloak.operator.crds.v2alpha1.deployment.spec.UpdateSpec;
 import org.keycloak.operator.upgrade.UpdateStrategy;
 
@@ -105,11 +107,12 @@ private static Keycloak createInitialDeployment(UpdateStrategy updateStrategy) {
         }
         var updateSpec = new UpdateSpec();
         updateSpec.setStrategy(updateStrategy);
+        kc.getSpec().setUpdateSpec(updateSpec);
 
-        if (kc.getSpec().getUnsupported() == null) {
-            kc.getSpec().setUnsupported(new UnsupportedSpec());
+        if (kc.getSpec().getFeatureSpec() == null) {
+            kc.getSpec().setFeatureSpec(new FeatureSpec());
         }
-        kc.getSpec().setUpdateSpec(updateSpec);
+        kc.getSpec().getFeatureSpec().setEnabledFeatures(List.of(Profile.Feature.ROLLING_UPDATES.getKey()));
         return kc;
     }
 

quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/cli/command/AbstractUpdatesCommand.java

@@ -80,4 +80,8 @@ void printPreviewWarning() {
         printError("Warning! This command is preview and is not recommended for use in production. It may change or be removed at a future release.");
     }
 
+    void printFeatureDisabled() {
+        printError("Unable to use this command. The preview feature 'rolling-updates' is not enabled.");
+    }
+
 }

quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/cli/command/UpdateCompatibilityCheck.java

@@ -20,7 +20,9 @@
 import java.io.File;
 import java.io.IOException;
 
+import org.keycloak.common.Profile;
 import org.keycloak.quarkus.runtime.cli.PropertyException;
+import org.keycloak.quarkus.runtime.compatibility.CompatibilityResult;
 import org.keycloak.quarkus.runtime.compatibility.ServerInfo;
 import org.keycloak.util.JsonSerialization;
 import picocli.CommandLine;
@@ -41,6 +43,11 @@ public class UpdateCompatibilityCheck extends AbstractUpdatesCommand {
 
     @Override
     public void run() {
+        if (!Profile.isFeatureEnabled(Profile.Feature.ROLLING_UPDATES)) {
+            printFeatureDisabled();
+            picocli.exit(CompatibilityResult.FEATURE_DISABLED);
+            return;
+        }
         printPreviewWarning();
         validateConfig();
         var info = readServerInfo();

quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/cli/command/UpdateCompatibilityMetadata.java

@@ -21,7 +21,9 @@
 import java.io.IOException;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import org.keycloak.common.Profile;
 import org.keycloak.quarkus.runtime.cli.PropertyException;
+import org.keycloak.quarkus.runtime.compatibility.CompatibilityResult;
 import org.keycloak.quarkus.runtime.compatibility.ServerInfo;
 import org.keycloak.util.JsonSerialization;
 import picocli.CommandLine;
@@ -41,6 +43,11 @@ public class UpdateCompatibilityMetadata extends AbstractUpdatesCommand {
 
     @Override
     public void run() {
+        if (!Profile.isFeatureEnabled(Profile.Feature.ROLLING_UPDATES)) {
+            printFeatureDisabled();
+            picocli.exit(CompatibilityResult.FEATURE_DISABLED);
+            return;
+        }
         printPreviewWarning();
         validateConfig();
         var info = compatibilityManager.current();

quarkus/runtime/src/main/java/org/keycloak/quarkus/runtime/compatibility/CompatibilityResult.java

@@ -28,7 +28,11 @@
 public interface CompatibilityResult {
 
     int ROLLING_UPGRADE_EXIT_CODE = 0;
-    int RECREATE_UPGRADE_EXIT_CODE = 4;
+    // see picocli.CommandLine.ExitCode
+    // 1 -> software error
+    // 2 -> usage error
+    int RECREATE_UPGRADE_EXIT_CODE = 3;
+    int FEATURE_DISABLED = 4;
 
     /**
      * The compatible {@link CompatibilityResult} implementation