Apply cluster state metadata and routing table diff when building clu…

CHANGELOG.md

@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Improve sort-query performance by retaining the default `totalHitsThreshold` for approximated `match_all` queries ([#18189](https://github.com/opensearch-project/OpenSearch/pull/18189))
 - Enable testing for ExtensiblePlugins using classpath plugins ([#16908](https://github.com/opensearch-project/OpenSearch/pull/16908))
 - Introduce system generated ingest pipeline ([#17817](https://github.com/opensearch-project/OpenSearch/pull/17817)))
+- Apply cluster state metadata and routing table diff when building cluster state from remote([#18256](https://github.com/opensearch-project/OpenSearch/pull/18256))
 
 ### Changed
 

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

@@ -12,12 +12,15 @@
 import org.apache.logging.log4j.Logger;
 import org.opensearch.action.admin.cluster.node.info.NodesInfoResponse;
 import org.opensearch.action.admin.cluster.node.stats.NodeStats;
+import org.opensearch.action.admin.cluster.node.stats.NodesStatsRequest;
 import org.opensearch.action.admin.cluster.node.stats.NodesStatsResponse;
 import org.opensearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
 import org.opensearch.action.admin.cluster.state.ClusterStateResponse;
+import org.opensearch.action.admin.indices.alias.IndicesAliasesRequest;
 import org.opensearch.cluster.ClusterState;
 import org.opensearch.cluster.coordination.CoordinationState;
 import org.opensearch.cluster.coordination.PersistedStateRegistry;
+import org.opensearch.cluster.coordination.PersistedStateStats;
 import org.opensearch.cluster.coordination.PublishClusterStateStats;
 import org.opensearch.common.blobstore.BlobPath;
 import org.opensearch.common.settings.Settings;
@@ -583,6 +586,44 @@ public void testRemotePublicationSettingChangePersistedAfterFullRestart() throws
         });
     }
 
+    public void testPublicationIndexAlias() throws Exception {
+        // create cluster with multi node (3 master + 2 data)
+        prepareCluster(3, 2, INDEX_NAME, 1, 2);
+        ensureStableCluster(5);
+        ensureGreen(INDEX_NAME);
+
+        createIndex("index-1");
+        createIndex("index-2");
+        createIndex("index-3");
+
+        IndicesAliasesRequest request = new IndicesAliasesRequest(); // <1>
+        IndicesAliasesRequest.AliasActions remoteIndexAction = new IndicesAliasesRequest.AliasActions(
+            IndicesAliasesRequest.AliasActions.Type.REMOVE_INDEX
+        ).index("index-1");
+        IndicesAliasesRequest.AliasActions aliasAction = new IndicesAliasesRequest.AliasActions(IndicesAliasesRequest.AliasActions.Type.ADD)
+            .index("index-2")
+            .alias("index-1");
+        request.addAliasAction(remoteIndexAction);
+        request.addAliasAction(aliasAction);
+
+        assertAcked(client().admin().indices().aliases(request).actionGet());
+        // assert here that NodeStats.discovery.remote_diff_download.failed_count is 0 for any/all node
+        NodesStatsResponse nodesStatsResponse = client().admin()
+            .cluster()
+            .nodesStats(new NodesStatsRequest().addMetric(DISCOVERY.metricName()))
+            .actionGet();
+        for (NodeStats node : nodesStatsResponse.getNodes()) {
+            List<PersistedStateStats> persistenceStats = node.getDiscoveryStats().getClusterStateStats().getPersistenceStats();
+            for (PersistedStateStats persistedStateStats : persistenceStats) {
+                String statsName = persistedStateStats.getStatsName();
+                if (FULL_DOWNLOAD_STATS.equals(statsName) || DIFF_DOWNLOAD_STATS.equals(statsName)) {
+                    assertEquals(0, persistedStateStats.getFailedCount());
+                }
+            }
+        }
+        ensureGreen(INDEX_NAME);
+    }
+
     private void assertDataNodeDownloadStats(NodeStats nodeStats) {
         // assert cluster state stats for data node
         DiscoveryStats dataNodeDiscoveryStats = nodeStats.getDiscoveryStats();

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

@@ -84,6 +84,7 @@
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
+import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.LongSupplier;
 import java.util.function.Supplier;
@@ -1202,6 +1203,51 @@
         Map<String, UploadedMetadataAttribute> clusterStateCustomToRead,
         boolean readIndexRoutingTableDiff,
         boolean includeEphemeral
+    ) {
+        return readClusterStateInParallel(
+            previousState,
+            manifest,
+            clusterUUID,
+            localNodeId,
+            indicesToRead,
+            customToRead,
+            readCoordinationMetadata,
+            readSettingsMetadata,
+            readTransientSettingsMetadata,
+            readTemplatesMetadata,
+            readDiscoveryNodes,
+            readClusterBlocks,
+            indicesRoutingToRead,
+            readHashesOfConsistentSettings,
+            clusterStateCustomToRead,
+            readIndexRoutingTableDiff,
+            includeEphemeral,
+            (metadataBuilder) -> {},
+            (routingTable) -> {}
+        );
+    }
+
+    // package private for testing
+    ClusterState readClusterStateInParallel(
+        ClusterState previousState,
+        ClusterMetadataManifest manifest,
+        String clusterUUID,
+        String localNodeId,
+        List<UploadedIndexMetadata> indicesToRead,
+        Map<String, UploadedMetadataAttribute> customToRead,
+        boolean readCoordinationMetadata,
+        boolean readSettingsMetadata,
+        boolean readTransientSettingsMetadata,
+        boolean readTemplatesMetadata,
+        boolean readDiscoveryNodes,
+        boolean readClusterBlocks,
+        List<UploadedIndexMetadata> indicesRoutingToRead,
+        boolean readHashesOfConsistentSettings,
+        Map<String, UploadedMetadataAttribute> clusterStateCustomToRead,
+        boolean readIndexRoutingTableDiff,
+        boolean includeEphemeral,
+        Consumer<Metadata.Builder> metadataTransformer,
+        Consumer<RoutingTable> routingTableTransformer
     ) {
         int totalReadTasks = indicesToRead.size() + customToRead.size() + (readCoordinationMetadata ? 1 : 0) + (readSettingsMetadata
             ? 1
@@ -1467,12 +1513,11 @@
         });
 
         metadataBuilder.indices(indexMetadataMap);
+        metadataTransformer.accept(metadataBuilder);
         if (readDiscoveryNodes) {
             clusterStateBuilder.nodes(discoveryNodesBuilder.get().localNodeId(localNodeId));
         }
 
-        clusterStateBuilder.metadata(metadataBuilder).version(manifest.getStateVersion()).stateUUID(manifest.getStateUUID());
-
         readIndexRoutingTableResults.forEach(
             indexRoutingTable -> indicesRouting.put(indexRoutingTable.getIndex().getName(), indexRoutingTable)
         );
@@ -1481,8 +1526,12 @@
         if (routingTableDiff != null) {
             newRoutingTable = routingTableDiff.apply(previousState.getRoutingTable());
         }
-        clusterStateBuilder.routingTable(newRoutingTable);
+        routingTableTransformer.accept(newRoutingTable);
 
+        clusterStateBuilder.metadata(metadataBuilder)
+            .routingTable(newRoutingTable)
+            .version(manifest.getStateVersion())
+            .stateUUID(manifest.getStateUUID());
         return clusterStateBuilder.build();
     }
 
@@ -1638,41 +1687,40 @@
                 manifest.getDiffManifest() != null
                     && manifest.getDiffManifest().getIndicesRoutingDiffPath() != null
                     && !manifest.getDiffManifest().getIndicesRoutingDiffPath().isEmpty(),
-                includeEphemeral
+                includeEphemeral,
+                (metadataBuilder) -> {
+                    // remove the deleted indices from the metadata
+                    for (String index : diff.getIndicesDeleted()) {
+                        metadataBuilder.remove(index);
+                    }
+                    // remove the deleted metadata customs from the metadata
+                    if (diff.getCustomMetadataDeleted() != null) {
+                        for (String customType : diff.getCustomMetadataDeleted()) {
+                            metadataBuilder.removeCustom(customType);
+                        }
+                    }
+                },
+                (routingTable) -> {
+                    Map<String, IndexRoutingTable> indexRoutingTables = routingTable.getIndicesRouting();
+                    if (manifest.getCodecVersion() == CODEC_V2 || manifest.getCodecVersion() == CODEC_V3) {
+                        for (String indexName : diff.getIndicesRoutingDeleted()) {
+                            indexRoutingTables.remove(indexName);
+                        }
+                    }
+                }
             );
             ClusterState.Builder clusterStateBuilder = ClusterState.builder(updatedClusterState);
-            Metadata.Builder metadataBuilder = Metadata.builder(updatedClusterState.metadata());
-            // remove the deleted indices from the metadata
-            for (String index : diff.getIndicesDeleted()) {
-                metadataBuilder.remove(index);
-            }
-            // remove the deleted metadata customs from the metadata
-            if (diff.getCustomMetadataDeleted() != null) {
-                for (String customType : diff.getCustomMetadataDeleted()) {
-                    metadataBuilder.removeCustom(customType);
-                }
-            }
-
             // remove the deleted cluster state customs from the metadata
             if (diff.getClusterStateCustomDeleted() != null) {
                 for (String customType : diff.getClusterStateCustomDeleted()) {
                     clusterStateBuilder.removeCustom(customType);
                 }
             }
 
-            HashMap<String, IndexRoutingTable> indexRoutingTables = new HashMap<>(
-                updatedClusterState.getRoutingTable().getIndicesRouting()
-            );
-            if (manifest.getCodecVersion() == CODEC_V2 || manifest.getCodecVersion() == CODEC_V3) {
-                for (String indexName : diff.getIndicesRoutingDeleted()) {
-                    indexRoutingTables.remove(indexName);
-                }
-            }
-
             ClusterState clusterState = clusterStateBuilder.stateUUID(manifest.getStateUUID())
                 .version(manifest.getStateVersion())
-                .metadata(metadataBuilder)
-                .routingTable(new RoutingTable(manifest.getRoutingTableVersion(), indexRoutingTables))
+                .metadata(updatedClusterState.metadata())
+                .routingTable(updatedClusterState.routingTable())
                 .build();
             if (!remoteClusterStateValidationMode.equals(RemoteClusterStateValidationMode.NONE)
                 && manifest.getClusterStateChecksum() != null) {

server/src/test/java/org/opensearch/gateway/remote/RemoteClusterStateServiceTests.java

@@ -3512,7 +3512,9 @@ public void testGetClusterStateUsingDiffWithChecksum() throws IOException {
                 anyBoolean(),
                 eq(emptyMap()),
                 anyBoolean(),
-                anyBoolean()
+                anyBoolean(),
+                any(),
+                any()
             );
         mockService.getClusterStateUsingDiff(manifest, clusterState, NODE_ID);
 
@@ -3554,7 +3556,9 @@ public void testGetClusterStateUsingDiffWithChecksumModeNone() throws IOExceptio
                 anyBoolean(),
                 eq(emptyMap()),
                 anyBoolean(),
-                anyBoolean()
+                anyBoolean(),
+                any(),
+                any()
             );
         mockService.getClusterStateUsingDiff(manifest, clusterState, NODE_ID);
 
@@ -3596,7 +3600,9 @@ public void testGetClusterStateUsingDiffWithChecksumModeDebugMismatch() throws I
                 anyBoolean(),
                 eq(emptyMap()),
                 anyBoolean(),
-                anyBoolean()
+                anyBoolean(),
+                any(),
+                any()
             );
         mockService.getClusterStateUsingDiff(manifest, clusterState, NODE_ID);
         verify(mockService, times(1)).validateClusterStateFromChecksum(
@@ -3637,7 +3643,9 @@ public void testGetClusterStateUsingDiffWithChecksumModeTraceMismatch() throws I
                 anyBoolean(),
                 eq(emptyMap()),
                 anyBoolean(),
-                anyBoolean()
+                anyBoolean(),
+                any(),
+                any()
             );
         doReturn(clusterState).when(mockService)
             .readClusterStateInParallel(
@@ -3657,7 +3665,9 @@ public void testGetClusterStateUsingDiffWithChecksumModeTraceMismatch() throws I
                 eq(true),
                 eq(manifest.getClusterStateCustomMap()),
                 eq(false),
-                eq(true)
+                eq(true),
+                any(),
+                any()
             );
 
         mockService.getClusterStateUsingDiff(manifest, clusterState, NODE_ID);
@@ -3699,7 +3709,9 @@ public void testGetClusterStateUsingDiffWithChecksumMismatch() throws IOExceptio
                 anyBoolean(),
                 eq(emptyMap()),
                 anyBoolean(),
-                anyBoolean()
+                anyBoolean(),
+                any(),
+                any()
             );
         doReturn(clusterState).when(mockService)
             .readClusterStateInParallel(
@@ -3719,7 +3731,9 @@ public void testGetClusterStateUsingDiffWithChecksumMismatch() throws IOExceptio
                 eq(true),
                 eq(manifest.getClusterStateCustomMap()),
                 eq(false),
-                eq(true)
+                eq(true),
+                any(),
+                any()
             );
 
         expectThrows(IllegalStateException.class, () -> mockService.getClusterStateUsingDiff(manifest, clusterState, NODE_ID));