[Backport 2.x] Make Remote Publication a static setting (#15478)

release-notes/opensearch.release-notes-2.17.0.md

@@ -51,6 +51,7 @@
 - Relax the join validation for Remote State publication ([#15471](https://github.com/opensearch-project/OpenSearch/pull/15471))
 - Reset DiscoveryNodes in all transport node actions request ([#15131](https://github.com/opensearch-project/OpenSearch/pull/15131))
 - MultiTermQueries in keyword fields now default to `indexed` approach and gated behind cluster setting ([#15637](https://github.com/opensearch-project/OpenSearch/pull/15637))
+- Static RemotePublication setting added, removed experimental feature flag ([#15478](https://github.com/opensearch-project/OpenSearch/pull/15478))
 
 ### Dependencies
 - Bump `netty` from 4.1.111.Final to 4.1.112.Final ([#15081](https://github.com/opensearch-project/OpenSearch/pull/15081))

server/src/internalClusterTest/java/org/opensearch/gateway/remote/RemoteClusterStateCleanupManagerIT.java

@@ -35,12 +35,12 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
 
-import static org.opensearch.common.util.FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL;
 import static org.opensearch.gateway.remote.RemoteClusterStateCleanupManager.CLUSTER_STATE_CLEANUP_INTERVAL_DEFAULT;
 import static org.opensearch.gateway.remote.RemoteClusterStateCleanupManager.REMOTE_CLUSTER_STATE_CLEANUP_INTERVAL_SETTING;
 import static org.opensearch.gateway.remote.RemoteClusterStateCleanupManager.RETAINED_MANIFESTS;
 import static org.opensearch.gateway.remote.RemoteClusterStateCleanupManager.SKIP_CLEANUP_STATE_CHANGES;
 import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_CLUSTER_STATE_ENABLED_SETTING;
+import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_PUBLICATION_SETTING_KEY;
 import static org.opensearch.gateway.remote.RemoteUploadStats.REMOTE_UPLOAD;
 import static org.opensearch.gateway.remote.routingtable.RemoteIndexRoutingTable.INDEX_ROUTING_TABLE;
 import static org.opensearch.indices.IndicesService.CLUSTER_DEFAULT_INDEX_REFRESH_INTERVAL_SETTING;
@@ -189,7 +189,7 @@ public void testRemoteCleanupDeleteStaleIndexRoutingFiles() throws Exception {
             RemoteStoreEnums.PathType.HASHED_PREFIX.toString()
         )
             .put("node.attr." + REMOTE_STORE_ROUTING_TABLE_REPOSITORY_NAME_ATTRIBUTE_KEY, REMOTE_ROUTING_TABLE_REPO)
-            .put(REMOTE_PUBLICATION_EXPERIMENTAL, true);
+            .put(REMOTE_PUBLICATION_SETTING_KEY, true);
 
         int shardCount = randomIntBetween(1, 2);
         int replicaCount = 1;

server/src/internalClusterTest/java/org/opensearch/gateway/remote/RemoteRoutingTableServiceIT.java

@@ -37,8 +37,8 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import static org.opensearch.common.util.FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL;
 import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_CLUSTER_STATE_ENABLED_SETTING;
+import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_PUBLICATION_SETTING_KEY;
 import static org.opensearch.gateway.remote.routingtable.RemoteIndexRoutingTable.INDEX_ROUTING_TABLE;
 import static org.opensearch.indices.IndicesService.CLUSTER_DEFAULT_INDEX_REFRESH_INTERVAL_SETTING;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.REMOTE_STORE_ROUTING_TABLE_REPOSITORY_NAME_ATTRIBUTE_KEY;
@@ -66,7 +66,7 @@ protected Settings nodeSettings(int nodeOrdinal) {
                 RemoteStoreEnums.PathType.HASHED_PREFIX.toString()
             )
             .put("node.attr." + REMOTE_STORE_ROUTING_TABLE_REPOSITORY_NAME_ATTRIBUTE_KEY, REMOTE_ROUTING_TABLE_REPO)
-            .put(REMOTE_PUBLICATION_EXPERIMENTAL, true)
+            .put(REMOTE_PUBLICATION_SETTING_KEY, true)
             .put(
                 RemoteClusterStateService.REMOTE_CLUSTER_STATE_CHECKSUM_VALIDATION_MODE_SETTING.getKey(),
                 RemoteClusterStateService.RemoteClusterStateValidationMode.FAILURE

server/src/internalClusterTest/java/org/opensearch/gateway/remote/RemoteStatePublicationIT.java

@@ -15,7 +15,6 @@
 import org.opensearch.client.Client;
 import org.opensearch.common.blobstore.BlobPath;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.discovery.DiscoveryStats;
 import org.opensearch.gateway.remote.ClusterMetadataManifest.UploadedIndexMetadata;
 import org.opensearch.gateway.remote.model.RemoteClusterMetadataManifest;
@@ -41,6 +40,7 @@
 
 import static org.opensearch.gateway.remote.RemoteClusterStateAttributesManager.DISCOVERY_NODES;
 import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_CLUSTER_STATE_ENABLED_SETTING;
+import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_PUBLICATION_SETTING_KEY;
 import static org.opensearch.gateway.remote.RemoteClusterStateUtils.DELIMITER;
 import static org.opensearch.gateway.remote.model.RemoteClusterBlocks.CLUSTER_BLOCKS;
 import static org.opensearch.gateway.remote.model.RemoteCoordinationMetadata.COORDINATION_METADATA;
@@ -75,14 +75,6 @@ public void setup() {
         hasRemoteRoutingCharPrefix = randomBoolean();
     }
 
-    @Override
-    protected Settings featureFlagSettings() {
-        return Settings.builder()
-            .put(super.featureFlagSettings())
-            .put(FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL, isRemotePublicationEnabled)
-            .build();
-    }
-
     @Override
     protected Settings nodeSettings(int nodeOrdinal) {
         String routingTableRepoName = "remote-routing-repo";
@@ -100,6 +92,7 @@ protected Settings nodeSettings(int nodeOrdinal) {
         return Settings.builder()
             .put(super.nodeSettings(nodeOrdinal))
             .put(REMOTE_CLUSTER_STATE_ENABLED_SETTING.getKey(), isRemoteStateEnabled)
+            .put(REMOTE_PUBLICATION_SETTING_KEY, isRemotePublicationEnabled)
             .put("node.attr." + REMOTE_STORE_ROUTING_TABLE_REPOSITORY_NAME_ATTRIBUTE_KEY, routingTableRepoName)
             .put(routingTableRepoTypeAttributeKey, ReloadableFsRepository.TYPE)
             .put(routingTableRepoSettingsAttributeKeyPrefix + "location", segmentRepoPath)
@@ -224,7 +217,6 @@ public void testRemotePublicationDownloadStats() {
             .get();
 
         assertDataNodeDownloadStats(nodesStatsResponseDataNode);
-
     }
 
     private void assertDataNodeDownloadStats(NodesStatsResponse nodesStatsResponse) {

server/src/main/java/org/opensearch/cluster/coordination/CoordinationState.java

@@ -39,7 +39,6 @@
 import org.opensearch.cluster.metadata.Metadata;
 import org.opensearch.cluster.node.DiscoveryNode;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.common.util.io.IOUtils;
 
 import java.io.Closeable;
@@ -53,7 +52,7 @@
 import java.util.Set;
 
 import static org.opensearch.cluster.coordination.Coordinator.ZEN1_BWC_TERM;
-import static org.opensearch.common.util.FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL;
+import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_PUBLICATION_SETTING;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.isRemoteStoreClusterStateEnabled;
 
 /**
@@ -81,7 +80,7 @@ public class CoordinationState {
     private VotingConfiguration lastPublishedConfiguration;
     private VoteCollection publishVotes;
     private final boolean isRemoteStateEnabled;
-    private final boolean isRemotePublicationEnabled;
+    private boolean isRemotePublicationEnabled;
 
     public CoordinationState(
         DiscoveryNode localNode,
@@ -106,7 +105,7 @@ public CoordinationState(
         this.publishVotes = new VoteCollection();
         this.isRemoteStateEnabled = isRemoteStoreClusterStateEnabled(settings);
         this.isRemotePublicationEnabled = isRemoteStateEnabled
-            && FeatureFlags.isEnabled(REMOTE_PUBLICATION_EXPERIMENTAL)
+            && REMOTE_PUBLICATION_SETTING.get(settings)
             && localNode.isRemoteStatePublicationEnabled();
     }
 

server/src/main/java/org/opensearch/common/settings/ClusterSettings.java

@@ -736,6 +736,7 @@ public void apply(Settings value, Settings current, Settings previous) {
                 // Remote cluster state settings
                 RemoteClusterStateCleanupManager.REMOTE_CLUSTER_STATE_CLEANUP_INTERVAL_SETTING,
                 RemoteClusterStateService.REMOTE_CLUSTER_STATE_ENABLED_SETTING,
+                RemoteClusterStateService.REMOTE_PUBLICATION_SETTING,
                 INDEX_METADATA_UPLOAD_TIMEOUT_SETTING,
                 GLOBAL_METADATA_UPLOAD_TIMEOUT_SETTING,
                 METADATA_MANIFEST_UPLOAD_TIMEOUT_SETTING,

server/src/main/java/org/opensearch/common/settings/FeatureFlagSettings.java

@@ -37,7 +37,6 @@ protected FeatureFlagSettings(
         FeatureFlags.TIERED_REMOTE_INDEX_SETTING,
         FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL_SETTING,
         FeatureFlags.PLUGGABLE_CACHE_SETTING,
-        FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL_SETTING,
         FeatureFlags.APPLICATION_BASED_CONFIGURATION_TEMPLATES_SETTING,
         FeatureFlags.STAR_TREE_INDEX_SETTING,
         FeatureFlags.READER_WRITER_SPLIT_EXPERIMENTAL_SETTING

server/src/main/java/org/opensearch/common/util/FeatureFlags.java

@@ -67,11 +67,6 @@ public class FeatureFlags {
      */
     public static final String PLUGGABLE_CACHE = "opensearch.experimental.feature.pluggable.caching.enabled";
 
-    /**
-     * Gates the functionality of remote routing table.
-     */
-    public static final String REMOTE_PUBLICATION_EXPERIMENTAL = "opensearch.experimental.feature.remote_store.publication.enabled";
-
     public static final String READER_WRITER_SPLIT_EXPERIMENTAL = "opensearch.experimental.feature.read.write.split.enabled";
 
     public static final Setting<Boolean> REMOTE_STORE_MIGRATION_EXPERIMENTAL_SETTING = Setting.boolSetting(
@@ -96,12 +91,6 @@ public class FeatureFlags {
 
     public static final Setting<Boolean> PLUGGABLE_CACHE_SETTING = Setting.boolSetting(PLUGGABLE_CACHE, false, Property.NodeScope);
 
-    public static final Setting<Boolean> REMOTE_PUBLICATION_EXPERIMENTAL_SETTING = Setting.boolSetting(
-        REMOTE_PUBLICATION_EXPERIMENTAL,
-        false,
-        Property.NodeScope
-    );
-
     public static final Setting<Boolean> READER_WRITER_SPLIT_EXPERIMENTAL_SETTING = Setting.boolSetting(
         READER_WRITER_SPLIT_EXPERIMENTAL,
         false,
@@ -143,7 +132,6 @@ public class FeatureFlags {
         DATETIME_FORMATTER_CACHING_SETTING,
         TIERED_REMOTE_INDEX_SETTING,
         PLUGGABLE_CACHE_SETTING,
-        REMOTE_PUBLICATION_EXPERIMENTAL_SETTING,
         APPLICATION_BASED_CONFIGURATION_TEMPLATES_SETTING,
         STAR_TREE_INDEX_SETTING,
         READER_WRITER_SPLIT_EXPERIMENTAL_SETTING

server/src/main/java/org/opensearch/gateway/remote/RemoteClusterStateService.java

@@ -40,7 +40,6 @@
 import org.opensearch.common.settings.Setting.Property;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.unit.TimeValue;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.common.util.io.IOUtils;
 import org.opensearch.core.action.ActionListener;
 import org.opensearch.core.common.io.stream.NamedWriteableRegistry;
@@ -92,7 +91,6 @@
 import static java.util.Collections.emptyList;
 import static java.util.Collections.emptyMap;
 import static org.opensearch.cluster.ClusterState.CUSTOM_VALUE_SERIALIZER;
-import static org.opensearch.common.util.FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL;
 import static org.opensearch.gateway.PersistedClusterStateService.SLOW_WRITE_LOGGING_THRESHOLD;
 import static org.opensearch.gateway.remote.ClusterMetadataManifest.CODEC_V2;
 import static org.opensearch.gateway.remote.ClusterMetadataManifest.CODEC_V3;
@@ -123,6 +121,18 @@ public class RemoteClusterStateService implements Closeable {
 
     private static final Logger logger = LogManager.getLogger(RemoteClusterStateService.class);
 
+    /**
+     * Gates the functionality of remote publication.
+     */
+    public static final String REMOTE_PUBLICATION_SETTING_KEY = "cluster.remote_store.publication.enabled";
+
+    public static final Setting<Boolean> REMOTE_PUBLICATION_SETTING = Setting.boolSetting(
+        REMOTE_PUBLICATION_SETTING_KEY,
+        false,
+        Property.NodeScope,
+        Property.Final
+    );
+
     /**
      * Used to specify if cluster state metadata should be published to remote store
      */
@@ -260,7 +270,7 @@ public RemoteClusterStateService(
         this.remoteStateStats = new RemotePersistenceStats();
         this.namedWriteableRegistry = namedWriteableRegistry;
         this.indexMetadataUploadListeners = indexMetadataUploadListeners;
-        this.isPublicationEnabled = FeatureFlags.isEnabled(REMOTE_PUBLICATION_EXPERIMENTAL)
+        this.isPublicationEnabled = REMOTE_PUBLICATION_SETTING.get(settings)
             && RemoteStoreNodeAttribute.isRemoteStoreClusterStateEnabled(settings)
             && RemoteStoreNodeAttribute.isRemoteRoutingTableEnabled(settings);
         this.remotePathPrefix = CLUSTER_REMOTE_STORE_STATE_PATH_PREFIX.get(settings);

server/src/test/java/org/opensearch/cluster/coordination/CoordinationStateTests.java

@@ -66,9 +66,9 @@
 
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.emptySet;
-import static org.opensearch.common.util.FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL;
 import static org.opensearch.gateway.remote.ClusterMetadataManifest.MANIFEST_CURRENT_CODEC_VERSION;
 import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_CLUSTER_STATE_ENABLED_SETTING;
+import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_PUBLICATION_SETTING_KEY;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.REMOTE_STORE_CLUSTER_STATE_REPOSITORY_NAME_ATTRIBUTE_KEY;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.REMOTE_STORE_REPOSITORY_SETTINGS_ATTRIBUTE_KEY_PREFIX;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.REMOTE_STORE_REPOSITORY_TYPE_ATTRIBUTE_KEY_FORMAT;
@@ -1010,7 +1010,7 @@ public void testIsRemotePublicationEnabled_WithInconsistentSettings() {
         // create settings with remote state disabled but publication enabled
         Settings settings = Settings.builder()
             .put(REMOTE_CLUSTER_STATE_ENABLED_SETTING.getKey(), false)
-            .put(REMOTE_PUBLICATION_EXPERIMENTAL, true)
+            .put(REMOTE_PUBLICATION_SETTING_KEY, true)
             .build();
         CoordinationState coordinationState = createCoordinationState(psr1, node1, settings);
         assertFalse(coordinationState.isRemotePublicationEnabled());

server/src/test/java/org/opensearch/cluster/routing/remote/RemoteRoutingTableServiceFactoryTests.java

@@ -10,7 +10,6 @@
 
 import org.opensearch.common.settings.ClusterSettings;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.repositories.RepositoriesService;
 import org.opensearch.repositories.fs.FsRepository;
 import org.opensearch.test.OpenSearchTestCase;
@@ -20,7 +19,7 @@
 
 import java.util.function.Supplier;
 
-import static org.opensearch.common.util.FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL;
+import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_PUBLICATION_SETTING_KEY;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.REMOTE_STORE_ROUTING_TABLE_REPOSITORY_NAME_ATTRIBUTE_KEY;
 
 public class RemoteRoutingTableServiceFactoryTests extends OpenSearchTestCase {
@@ -50,9 +49,8 @@ public void testGetServiceWhenRemoteRoutingEnabled() {
         Settings settings = Settings.builder()
             .put("node.attr." + REMOTE_STORE_ROUTING_TABLE_REPOSITORY_NAME_ATTRIBUTE_KEY, "routing_repository")
             .put(FsRepository.REPOSITORIES_COMPRESS_SETTING.getKey(), false)
+            .put(REMOTE_PUBLICATION_SETTING_KEY, "true")
             .build();
-        Settings nodeSettings = Settings.builder().put(REMOTE_PUBLICATION_EXPERIMENTAL, "true").build();
-        FeatureFlags.initializeFeatureFlags(nodeSettings);
         RemoteRoutingTableService service = RemoteRoutingTableServiceFactory.getService(
             repositoriesService,
             settings,

server/src/test/java/org/opensearch/cluster/routing/remote/RemoteRoutingTableServiceTests.java

@@ -28,7 +28,6 @@
 import org.opensearch.common.compress.DeflateCompressor;
 import org.opensearch.common.settings.ClusterSettings;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.common.util.TestCapturingListener;
 import org.opensearch.core.action.ActionListener;
 import org.opensearch.core.compress.Compressor;
@@ -63,8 +62,8 @@
 
 import org.mockito.Mockito;
 
-import static org.opensearch.common.util.FeatureFlags.REMOTE_PUBLICATION_EXPERIMENTAL;
 import static org.opensearch.gateway.remote.ClusterMetadataManifestTests.randomUploadedIndexMetadataList;
+import static org.opensearch.gateway.remote.RemoteClusterStateService.REMOTE_PUBLICATION_SETTING_KEY;
 import static org.opensearch.gateway.remote.RemoteClusterStateServiceTests.generateClusterStateWithOneIndex;
 import static org.opensearch.gateway.remote.RemoteClusterStateUtils.CLUSTER_STATE_PATH_TOKEN;
 import static org.opensearch.gateway.remote.RemoteClusterStateUtils.DELIMITER;
@@ -114,6 +113,7 @@ public void setup() {
 
         Settings settings = Settings.builder()
             .put("node.attr." + REMOTE_STORE_ROUTING_TABLE_REPOSITORY_NAME_ATTRIBUTE_KEY, "routing_repository")
+            .put(REMOTE_PUBLICATION_SETTING_KEY, "true")
             .build();
         clusterSettings = new ClusterSettings(settings, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS);
         clusterService = mock(ClusterService.class);
@@ -126,8 +126,6 @@ public void setup() {
         when(repositoriesService.repository("routing_repository")).thenReturn(blobStoreRepository);
         when(blobStoreRepository.blobStore()).thenReturn(blobStore);
         when(blobStore.blobContainer(any())).thenReturn(blobContainer);
-        Settings nodeSettings = Settings.builder().put(REMOTE_PUBLICATION_EXPERIMENTAL, "true").build();
-        FeatureFlags.initializeFeatureFlags(nodeSettings);
         compressor = new NoneCompressor();
         basePath = BlobPath.cleanPath().add("base-path");
         when(blobStoreRepository.basePath()).thenReturn(basePath);