Move Remote Store Migration from DocRep to GA (opensearch-project#14100)

Signed-off-by: Gaurav Bafna <[email protected]>

---------

Signed-off-by: Gaurav Bafna <[email protected]>

CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Remote Store] Add support to disable flush based on translog reader count ([#14027](https://github.com/opensearch-project/OpenSearch/pull/14027))
 - [Query Insights] Add exporter support for top n queries ([#12982](https://github.com/opensearch-project/OpenSearch/pull/12982))
 - [Query Insights] Add X-Opaque-Id to search request metadata for top n queries ([#13374](https://github.com/opensearch-project/OpenSearch/pull/13374))
+- Move Remote Store Migration from DocRep to GA and modify remote migration settings name ([#14100](https://github.com/opensearch-project/OpenSearch/pull/14100))
 - [Remote State] Add async remote state deletion task running on an interval, configurable by a setting ([#13995](https://github.com/opensearch-project/OpenSearch/pull/13995))
 - Add remote routing table for remote state publication with experimental feature flag ([#13304](https://github.com/opensearch-project/OpenSearch/pull/13304))
 

server/src/internalClusterTest/java/org/opensearch/remotemigration/MigrationBaseTestCase.java

@@ -21,7 +21,6 @@
 import org.opensearch.cluster.routing.RoutingNode;
 import org.opensearch.common.UUIDs;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.repositories.fs.ReloadableFsRepository;
 import org.opensearch.test.OpenSearchIntegTestCase;
 import org.junit.Before;
@@ -87,11 +86,6 @@ protected Settings nodeSettings(int nodeOrdinal) {
         }
     }
 
-    @Override
-    protected Settings featureFlagSettings() {
-        return Settings.builder().put(super.featureFlagSettings()).put(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build();
-    }
-
     protected void setFailRate(String repoName, int value) throws ExecutionException, InterruptedException {
         GetRepositoriesRequest gr = new GetRepositoriesRequest(new String[] { repoName });
         GetRepositoriesResponse res = client().admin().cluster().getRepositories(gr).get();

server/src/internalClusterTest/java/org/opensearch/remotemigration/RemoteStoreMigrationTestCase.java

@@ -17,6 +17,7 @@
 import org.opensearch.common.Priority;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.unit.TimeValue;
+import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.index.query.QueryBuilders;
 import org.opensearch.repositories.blobstore.BlobStoreRepository;
 import org.opensearch.snapshots.SnapshotInfo;
@@ -42,6 +43,11 @@ protected int minimumNumberOfReplicas() {
         return 1;
     }
 
+    @Override
+    protected Settings featureFlagSettings() {
+        return Settings.builder().put(super.featureFlagSettings()).put(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build();
+    }
+
     public void testMixedModeAddRemoteNodes() throws Exception {
         internalCluster().setBootstrapClusterManagerNodeIndex(0);
         List<String> cmNodes = internalCluster().startNodes(1);

server/src/internalClusterTest/java/org/opensearch/remotemigration/ResizeIndexMigrationTestCase.java

@@ -12,6 +12,7 @@
 import org.opensearch.action.admin.indices.shrink.ResizeType;
 import org.opensearch.action.support.ActiveShardCount;
 import org.opensearch.common.settings.Settings;
+import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.indices.replication.common.ReplicationType;
 import org.opensearch.test.OpenSearchIntegTestCase;
 
@@ -27,6 +28,11 @@ public class ResizeIndexMigrationTestCase extends MigrationBaseTestCase {
     private final static String DOC_REP_DIRECTION = "docrep";
     private final static String MIXED_MODE = "mixed";
 
+    @Override
+    protected Settings featureFlagSettings() {
+        return Settings.builder().put(super.featureFlagSettings()).put(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build();
+    }
+
     /*
     * This test will verify the resize request failure, when cluster mode is mixed
     * and index is on DocRep node, and migration to remote store is in progress.

server/src/main/java/org/opensearch/cluster/ClusterModule.java

@@ -83,7 +83,6 @@
 import org.opensearch.common.settings.Setting;
 import org.opensearch.common.settings.Setting.Property;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.common.util.concurrent.ThreadContext;
 import org.opensearch.common.util.set.Sets;
 import org.opensearch.core.ParseField;
@@ -379,9 +378,7 @@ public static Collection<AllocationDecider> createAllocationDeciders(
         addAllocationDecider(deciders, new AwarenessAllocationDecider(settings, clusterSettings));
         addAllocationDecider(deciders, new NodeLoadAwareAllocationDecider(settings, clusterSettings));
         addAllocationDecider(deciders, new TargetPoolAllocationDecider());
-        if (FeatureFlags.isEnabled(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL_SETTING)) {
-            addAllocationDecider(deciders, new RemoteStoreMigrationAllocationDecider(settings, clusterSettings));
-        }
+        addAllocationDecider(deciders, new RemoteStoreMigrationAllocationDecider(settings, clusterSettings));
 
         clusterPlugins.stream()
             .flatMap(p -> p.createAllocationDeciders(settings, clusterSettings).stream())

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

@@ -23,7 +23,7 @@
  */
 public class FeatureFlags {
     /**
-     * Gates the visibility of the remote store migration support from docrep .
+     * Gates the visibility of the remote store to docrep migration.
      */
     public static final String REMOTE_STORE_MIGRATION_EXPERIMENTAL = "opensearch.experimental.feature.remote_store.migration.enabled";
 

server/src/main/java/org/opensearch/node/remotestore/RemoteStoreNodeService.java

@@ -42,31 +42,21 @@ public class RemoteStoreNodeService {
     private final Supplier<RepositoriesService> repositoriesService;
     private final ThreadPool threadPool;
     public static final Setting<CompatibilityMode> REMOTE_STORE_COMPATIBILITY_MODE_SETTING = new Setting<>(
-        "remote_store.compatibility_mode",
+        "cluster.remote_store.compatibility_mode",
         CompatibilityMode.STRICT.name(),
         CompatibilityMode::parseString,
-        value -> {
-            if (value == CompatibilityMode.MIXED
-                && FeatureFlags.isEnabled(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL_SETTING) == false) {
-                throw new IllegalArgumentException(
-                    " mixed mode is under an experimental feature and can be activated only by enabling "
-                        + REMOTE_STORE_MIGRATION_EXPERIMENTAL
-                        + " feature flag in the JVM options "
-                );
-            }
-        },
         Setting.Property.Dynamic,
         Setting.Property.NodeScope
     );
 
     public static final Setting<Direction> MIGRATION_DIRECTION_SETTING = new Setting<>(
-        "migration.direction",
+        "cluster.migration.direction",
         Direction.NONE.name(),
         Direction::parseString,
         value -> {
-            if (value != Direction.NONE && FeatureFlags.isEnabled(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL_SETTING) == false) {
+            if (value == Direction.DOCREP && FeatureFlags.isEnabled(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL_SETTING) == false) {
                 throw new IllegalArgumentException(
-                    " migration.direction is under an experimental feature and can be activated only by enabling "
+                    " remote store to docrep migration.direction is under an experimental feature and can be activated only by enabling "
                         + REMOTE_STORE_MIGRATION_EXPERIMENTAL
                         + " feature flag in the JVM options "
                 );

server/src/test/java/org/opensearch/cluster/ClusterModuleTests.java

@@ -68,7 +68,6 @@
 import org.opensearch.common.settings.Setting.Property;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.settings.SettingsModule;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.common.util.concurrent.ThreadContext;
 import org.opensearch.gateway.GatewayAllocator;
 import org.opensearch.plugins.ClusterPlugin;
@@ -243,11 +242,9 @@ public void testAllocationDeciderOrder() {
             ShardsLimitAllocationDecider.class,
             AwarenessAllocationDecider.class,
             NodeLoadAwareAllocationDecider.class,
-            TargetPoolAllocationDecider.class
+            TargetPoolAllocationDecider.class,
+            RemoteStoreMigrationAllocationDecider.class
         );
-        if (FeatureFlags.isEnabled(FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL_SETTING)) {
-            expectedDeciders.add(RemoteStoreMigrationAllocationDecider.class);
-        }
         Collection<AllocationDecider> deciders = ClusterModule.createAllocationDeciders(
             Settings.EMPTY,
             new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS),

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

@@ -498,8 +498,6 @@ public void testRemoteStoreNodeJoiningNonRemoteStoreClusterMixedMode() {
             .put(MIGRATION_DIRECTION_SETTING.getKey(), RemoteStoreNodeService.Direction.REMOTE_STORE)
             .put(REMOTE_STORE_COMPATIBILITY_MODE_SETTING.getKey(), "mixed")
             .build();
-        final Settings nodeSettings = Settings.builder().put(REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build();
-        FeatureFlags.initializeFeatureFlags(nodeSettings);
         Metadata metadata = Metadata.builder().persistentSettings(settings).build();
         ClusterState currentState = ClusterState.builder(ClusterName.DEFAULT)
             .nodes(DiscoveryNodes.builder().add(existingNode).localNodeId(existingNode.getId()).build())
@@ -517,8 +515,6 @@ public void testAllTypesNodeJoiningRemoteStoreClusterMixedMode() {
             .put(MIGRATION_DIRECTION_SETTING.getKey(), RemoteStoreNodeService.Direction.REMOTE_STORE)
             .put(REMOTE_STORE_COMPATIBILITY_MODE_SETTING.getKey(), "mixed")
             .build();
-        final Settings nodeSettings = Settings.builder().put(REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build();
-        FeatureFlags.initializeFeatureFlags(nodeSettings);
         Metadata metadata = Metadata.builder().persistentSettings(settings).build();
         ClusterState currentState = ClusterState.builder(ClusterName.DEFAULT)
             .nodes(
@@ -970,9 +966,6 @@ public void testUpdatesClusterStateWithMultiNodeClusterAndSameRepository() throw
     }
 
     public void testNodeJoinInMixedMode() {
-        Settings nodeSettings = Settings.builder().put(REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build();
-        FeatureFlags.initializeFeatureFlags(nodeSettings);
-
         List<Version> versions = allOpenSearchVersions();
         assert versions.size() >= 2 : "test requires at least two open search versions";
         Version baseVersion = versions.get(versions.size() - 2);

server/src/test/java/org/opensearch/cluster/routing/allocation/RemoteStoreMigrationAllocationDeciderTests.java

@@ -54,7 +54,6 @@
 import org.opensearch.common.UUIDs;
 import org.opensearch.common.settings.ClusterSettings;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.core.index.shard.ShardId;
 import org.opensearch.indices.replication.common.ReplicationType;
 import org.opensearch.node.remotestore.RemoteStoreNodeService;
@@ -68,7 +67,6 @@
 import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_REMOTE_STORE_ENABLED;
 import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_REMOTE_TRANSLOG_STORE_REPOSITORY;
 import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_REPLICATION_TYPE;
-import static org.opensearch.common.util.FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL;
 import static org.opensearch.node.remotestore.RemoteStoreNodeAttribute.REMOTE_STORE_CLUSTER_STATE_REPOSITORY_NAME_ATTRIBUTE_KEY;
 import static org.opensearch.node.remotestore.RemoteStoreNodeService.Direction.NONE;
 import static org.opensearch.node.remotestore.RemoteStoreNodeService.Direction.REMOTE_STORE;
@@ -81,8 +79,6 @@ public class RemoteStoreMigrationAllocationDeciderTests extends OpenSearchAlloca
     private final static String TEST_INDEX = "test_index";
     private final static String TEST_REPO = "test_repo";
 
-    private final Settings directionEnabledNodeSettings = Settings.builder().put(REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build();
-
     private final Settings strictModeCompatibilitySettings = Settings.builder()
         .put(REMOTE_STORE_COMPATIBILITY_MODE_SETTING.getKey(), RemoteStoreNodeService.CompatibilityMode.STRICT)
         .build();
@@ -111,7 +107,6 @@ public class RemoteStoreMigrationAllocationDeciderTests extends OpenSearchAlloca
     private ShardId shardId = new ShardId(TEST_INDEX, "_na_", 0);
 
     private void beforeAllocation(String direction) {
-        FeatureFlags.initializeFeatureFlags(directionEnabledNodeSettings);
         if (isRemoteStoreBackedIndex == null) {
             isRemoteStoreBackedIndex = randomBoolean();
         }
@@ -584,9 +579,6 @@ private Settings getCustomSettings(String direction, String compatibilityMode, I
 
         // index metadata settings
         builder.put(indexMetadataBuilder.build().getSettings());
-
-        builder.put(directionEnabledNodeSettings);
-
         return builder.build();
     }
 

server/src/test/java/org/opensearch/cluster/routing/allocation/decider/FilterAllocationDeciderTests.java

@@ -51,7 +51,6 @@
 import org.opensearch.common.settings.IndexScopedSettings;
 import org.opensearch.common.settings.Setting;
 import org.opensearch.common.settings.Settings;
-import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.node.remotestore.RemoteStoreNodeService;
 import org.opensearch.snapshots.EmptySnapshotsInfoService;
 import org.opensearch.test.gateway.TestGatewayAllocator;
@@ -64,7 +63,6 @@
 import static org.opensearch.cluster.routing.ShardRoutingState.INITIALIZING;
 import static org.opensearch.cluster.routing.ShardRoutingState.STARTED;
 import static org.opensearch.cluster.routing.ShardRoutingState.UNASSIGNED;
-import static org.opensearch.common.util.FeatureFlags.REMOTE_STORE_MIGRATION_EXPERIMENTAL;
 import static org.opensearch.node.remotestore.RemoteStoreNodeService.MIGRATION_DIRECTION_SETTING;
 import static org.opensearch.node.remotestore.RemoteStoreNodeService.REMOTE_STORE_COMPATIBILITY_MODE_SETTING;
 
@@ -416,7 +414,6 @@ public void testWildcardIPFilter() {
     public void testMixedModeRemoteStoreAllocation() {
         // For mixed mode remote store direction cluster's existing indices replica creation ,
         // we don't consider filter allocation decider for replica of existing indices
-        FeatureFlags.initializeFeatureFlags(Settings.builder().put(REMOTE_STORE_MIGRATION_EXPERIMENTAL, "true").build());
         ClusterSettings clusterSettings = new ClusterSettings(Settings.builder().build(), ClusterSettings.BUILT_IN_CLUSTER_SETTINGS);
         Settings initialSettings = Settings.builder()
             .put("cluster.routing.allocation.exclude._id", "node2")