Add a NodeFeature and require it in the YAML test

modules/data-streams/src/yamlRestTest/resources/rest-api-spec/test/data_stream/220_failure_store_cluster_setting.yml

@@ -1,6 +1,6 @@
 setup:
   - requires:
-      reason: "Data stream options was added in 8.18+"
+      reason: "Data stream options and cluster setting for feature store were added in 8.18+"
       test_runner_features: [ capabilities, allowed_warnings, contains ]
       capabilities:
         - method: POST
@@ -9,6 +9,7 @@ setup:
         - method: POST
           path: /_index_template/{template}
           capabilities: [ 'failure_store_in_template' ]
+      cluster_features: [ 'data_streams.failure_store.cluster_setting' ]
 
   - do:
       cluster.put_settings:

server/src/main/java/module-info.java

@@ -439,7 +439,8 @@
             org.elasticsearch.script.ScriptFeatures,
             org.elasticsearch.search.retriever.RetrieversFeatures,
             org.elasticsearch.reservedstate.service.FileSettingsFeatures,
-            org.elasticsearch.action.admin.cluster.stats.ClusterStatsFeatures;
+            org.elasticsearch.action.admin.cluster.stats.ClusterStatsFeatures,
+            org.elasticsearch.cluster.metadata.DataStreamFailureStoreSettingsFeatureSpecification;
 
     uses org.elasticsearch.plugins.internal.SettingsExtension;
     uses RestExtension;

server/src/main/java/org/elasticsearch/cluster/metadata/DataStreamFailureStoreSettings.java

@@ -14,6 +14,8 @@
 import org.elasticsearch.common.regex.Regex;
 import org.elasticsearch.common.settings.ClusterSettings;
 import org.elasticsearch.common.settings.Setting;
+import org.elasticsearch.core.UpdateForV10;
+import org.elasticsearch.features.NodeFeature;
 
 import java.util.List;
 import java.util.function.Predicate;
@@ -25,6 +27,9 @@
  */
 public class DataStreamFailureStoreSettings {
 
+    @UpdateForV10(owner = UpdateForV10.Owner.DATA_MANAGEMENT) // Remove this when we no longer need BWC with versions without this feature
+    static final NodeFeature NODE_FEATURE = new NodeFeature("data_streams.failure_store.cluster_setting");
+
     private static final Logger logger = LogManager.getLogger(DataStreamFailureStoreSettings.class);
 
     public static final Setting<List<String>> DATA_STREAM_FAILURE_STORED_ENABLED_SETTING = Setting.stringListSetting(

server/src/main/java/org/elasticsearch/cluster/metadata/DataStreamFailureStoreSettingsFeatureSpecification.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the "Elastic License
+ * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
+ * Public License v 1"; you may not use this file except in compliance with, at
+ * your election, the "Elastic License 2.0", the "GNU Affero General Public
+ * License v3.0 only", or the "Server Side Public License, v 1".
+ */
+
+package org.elasticsearch.cluster.metadata;
+
+import org.elasticsearch.features.FeatureSpecification;
+import org.elasticsearch.features.NodeFeature;
+
+import java.util.Set;
+
+/**
+ * Registers the ability to specify data stream failure store cluster settings as a node feature.
+ */
+public class DataStreamFailureStoreSettingsFeatureSpecification implements FeatureSpecification {
+
+    public Set<NodeFeature> getFeatures() {
+        return DataStream.isFailureStoreFeatureFlagEnabled() ? Set.of(DataStreamFailureStoreSettings.NODE_FEATURE) : Set.of();
+    }
+}

server/src/main/resources/META-INF/services/org.elasticsearch.features.FeatureSpecification

@@ -24,3 +24,4 @@ org.elasticsearch.script.ScriptFeatures
 org.elasticsearch.reservedstate.service.FileSettingsFeatures
 org.elasticsearch.cluster.routing.RoutingFeatures
 org.elasticsearch.action.admin.cluster.stats.ClusterStatsFeatures
+org.elasticsearch.cluster.metadata.DataStreamFailureStoreSettingsFeatureSpecification