[Remote Store] Add consumer for Remote Store based index settings

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

@@ -13,6 +13,8 @@
 import org.opensearch.action.admin.cluster.health.ClusterHealthResponse;
 import org.opensearch.action.admin.cluster.repositories.get.GetRepositoriesRequest;
 import org.opensearch.action.admin.cluster.repositories.get.GetRepositoriesResponse;
+import org.opensearch.action.admin.indices.get.GetIndexRequest;
+import org.opensearch.action.admin.indices.get.GetIndexResponse;
 import org.opensearch.action.bulk.BulkRequest;
 import org.opensearch.action.bulk.BulkResponse;
 import org.opensearch.action.delete.DeleteResponse;
@@ -21,12 +23,17 @@
 import org.opensearch.client.Requests;
 import org.opensearch.cluster.ClusterState;
 import org.opensearch.cluster.health.ClusterHealthStatus;
+import org.opensearch.cluster.metadata.IndexMetadata;
 import org.opensearch.cluster.metadata.RepositoryMetadata;
 import org.opensearch.cluster.routing.RoutingNode;
 import org.opensearch.common.Priority;
 import org.opensearch.common.UUIDs;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.common.unit.TimeValue;
+import org.opensearch.core.index.Index;
+import org.opensearch.index.IndexService;
+import org.opensearch.index.shard.IndexShard;
+import org.opensearch.indices.IndicesService;
 import org.opensearch.repositories.fs.ReloadableFsRepository;
 import org.opensearch.test.OpenSearchIntegTestCase;
 import org.junit.Before;
@@ -261,4 +268,13 @@ public ClusterHealthStatus waitForRelocation(TimeValue t) {
         }
         return actionGet.getStatus();
     }
+
+    protected IndexShard getIndexShard(String dataNode, String indexName) throws ExecutionException, InterruptedException {
+        String clusterManagerName = internalCluster().getClusterManagerName();
+        IndicesService indicesService = internalCluster().getInstance(IndicesService.class, dataNode);
+        GetIndexResponse getIndexResponse = client(clusterManagerName).admin().indices().getIndex(new GetIndexRequest()).get();
+        String uuid = getIndexResponse.getSettings().get(indexName).get(IndexMetadata.SETTING_INDEX_UUID);
+        IndexService indexService = indicesService.indexService(new Index(indexName, uuid));
+        return indexService.getShard(0);
+    }
 }

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

@@ -17,6 +17,7 @@
 import org.opensearch.common.unit.TimeValue;
 import org.opensearch.common.util.FeatureFlags;
 import org.opensearch.index.query.QueryBuilders;
+import org.opensearch.index.shard.IndexShard;
 import org.opensearch.repositories.blobstore.BlobStoreRepository;
 import org.opensearch.snapshots.SnapshotInfo;
 import org.opensearch.test.OpenSearchIntegTestCase;
@@ -216,4 +217,12 @@ public void testEndToEndRemoteMigration() throws Exception {
             asyncIndexingService.getIndexedDocs()
         );
     }
+
+    public void testRemoteSettingPropagatedToIndexShardAfterMigration() throws Exception {
+        testEndToEndRemoteMigration();
+        IndexShard indexShard = getIndexShard(primaryNodeName("test"), "test");
+        assertTrue(indexShard.indexSettings().isRemoteStoreEnabled());
+        assertEquals(MigrationBaseTestCase.REPOSITORY_NAME, indexShard.indexSettings().getRemoteStoreRepository());
+        assertEquals(MigrationBaseTestCase.REPOSITORY_2_NAME, indexShard.indexSettings().getRemoteStoreTranslogRepository());
+    }
 }

server/src/main/java/org/opensearch/index/IndexSettings.java

@@ -732,11 +732,11 @@ public static IndexMergePolicy fromString(String text) {
     private final Settings nodeSettings;
     private final int numberOfShards;
     private final ReplicationType replicationType;
-    private final boolean isRemoteStoreEnabled;
+    private volatile boolean isRemoteStoreEnabled;
     private final boolean isStoreLocalityPartial;
     private volatile TimeValue remoteTranslogUploadBufferInterval;
-    private final String remoteStoreTranslogRepository;
-    private final String remoteStoreRepository;
+    private volatile String remoteStoreTranslogRepository;
+    private volatile String remoteStoreRepository;
     private int remoteTranslogKeepExtraGen;
     private Version extendedCompatibilitySnapshotVersion;
 
@@ -1132,6 +1132,15 @@ public IndexSettings(final IndexMetadata indexMetadata, final Settings nodeSetti
             this::setDocIdFuzzySetFalsePositiveProbability
         );
         scopedSettings.addSettingsUpdateConsumer(ALLOW_DERIVED_FIELDS, this::setAllowDerivedField);
+        scopedSettings.addSettingsUpdateConsumer(IndexMetadata.INDEX_REMOTE_STORE_ENABLED_SETTING, this::setRemoteStoreEnabled);
+        scopedSettings.addSettingsUpdateConsumer(
+            IndexMetadata.INDEX_REMOTE_SEGMENT_STORE_REPOSITORY_SETTING,
+            this::setRemoteStoreRepository
+        );
+        scopedSettings.addSettingsUpdateConsumer(
+            IndexMetadata.INDEX_REMOTE_TRANSLOG_REPOSITORY_SETTING,
+            this::setRemoteStoreTranslogRepository
+        );
     }
 
     private void setSearchIdleAfter(TimeValue searchIdleAfter) {
@@ -1950,4 +1959,16 @@ public RemoteStorePathStrategy getRemoteStorePathStrategy() {
     public boolean isTranslogMetadataEnabled() {
         return isTranslogMetadataEnabled;
     }
+
+    public void setRemoteStoreEnabled(boolean isRemoteStoreEnabled) {
+        this.isRemoteStoreEnabled = isRemoteStoreEnabled;
+    }
+
+    public void setRemoteStoreRepository(String remoteStoreRepository) {
+        this.remoteStoreRepository = remoteStoreRepository;
+    }
+
+    public void setRemoteStoreTranslogRepository(String remoteStoreTranslogRepository) {
+        this.remoteStoreTranslogRepository = remoteStoreTranslogRepository;
+    }
 }

server/src/main/java/org/opensearch/repositories/blobstore/BlobStoreRepository.java

@@ -2678,7 +2678,7 @@ public void snapshotRemoteStoreIndexShard(
         final ShardId shardId = store.shardId();
         try {
             final String generation = snapshotStatus.generation();
-            logger.info("[{}] [{}] snapshot to [{}] [{}] ...", shardId, snapshotId, metadata.name(), generation);
+            logger.info("[{}] [{}] shallow copy snapshot to [{}] [{}] ...", shardId, snapshotId, metadata.name(), generation);
             final BlobContainer shardContainer = shardContainer(indexId, shardId);
 
             long indexTotalFileSize = 0;