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Add support for restoring from snapshot with search replicas (opensea…
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…rch-project#16111)

Signed-off-by: Vinay Krishna Pudyodu <vinkrish.neo@gmail.com>
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vinaykpud committed Oct 25, 2024
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -29,6 +29,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
- [Star Tree - Search] Add support for metric aggregations with/without term query ([15289](https://github.com/opensearch-project/OpenSearch/pull/15289))
- URI path filtering support in cluster stats API ([#15938](https://github.com/opensearch-project/OpenSearch/pull/15938))
- Add support for renaming aliases during snapshot restore ([#16292](https://github.com/opensearch-project/OpenSearch/pull/16292))
- Add support for restoring from snapshot with search replicas ([#16111](https://github.com/opensearch-project/OpenSearch/pull/16111))

### Dependencies
- Bump `org.apache.logging.log4j:log4j-core` from 2.23.1 to 2.24.0 ([#15858](https://github.com/opensearch-project/OpenSearch/pull/15858))
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/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/

package org.opensearch.indices.replication;

import org.opensearch.action.search.SearchResponse;
import org.opensearch.cluster.metadata.IndexMetadata;
import org.opensearch.cluster.metadata.Metadata;
import org.opensearch.common.settings.Settings;
import org.opensearch.common.util.FeatureFlags;
import org.opensearch.index.query.QueryBuilders;
import org.opensearch.indices.replication.common.ReplicationType;
import org.opensearch.snapshots.AbstractSnapshotIntegTestCase;
import org.opensearch.snapshots.SnapshotRestoreException;
import org.opensearch.test.OpenSearchIntegTestCase;

import java.util.List;

import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_SEARCH_REPLICAS;
import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertAcked;
import static org.opensearch.test.hamcrest.OpenSearchAssertions.assertHitCount;

@OpenSearchIntegTestCase.ClusterScope(scope = OpenSearchIntegTestCase.Scope.TEST, numDataNodes = 0)
public class SearchReplicaRestoreIT extends AbstractSnapshotIntegTestCase {

private static final String INDEX_NAME = "test-idx-1";
private static final String RESTORED_INDEX_NAME = INDEX_NAME + "-restored";
private static final String REPOSITORY_NAME = "test-repo";
private static final String SNAPSHOT_NAME = "test-snapshot";
private static final String FS_REPOSITORY_TYPE = "fs";
private static final int DOC_COUNT = 10;

@Override
protected Settings featureFlagSettings() {
return Settings.builder().put(super.featureFlagSettings()).put(FeatureFlags.READER_WRITER_SPLIT_EXPERIMENTAL, true).build();
}

public void testSearchReplicaRestore_WhenSnapshotOnDocRep_RestoreOnDocRepWithSearchReplica() throws Exception {
bootstrapIndexWithOutSearchReplicas(ReplicationType.DOCUMENT);
createRepoAndSnapshot(REPOSITORY_NAME, FS_REPOSITORY_TYPE, SNAPSHOT_NAME, INDEX_NAME);

SnapshotRestoreException exception = expectThrows(
SnapshotRestoreException.class,
() -> restoreSnapshot(
REPOSITORY_NAME,
SNAPSHOT_NAME,
INDEX_NAME,
RESTORED_INDEX_NAME,
Settings.builder()
.put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.DOCUMENT)
.put(SETTING_NUMBER_OF_SEARCH_REPLICAS, 1)
.build()
)
);
assertTrue(exception.getMessage().contains(getSnapshotExceptionMessage(ReplicationType.DOCUMENT, ReplicationType.DOCUMENT)));
}

public void testSearchReplicaRestore_WhenSnapshotOnDocRep_RestoreOnSegRepWithSearchReplica() throws Exception {
bootstrapIndexWithOutSearchReplicas(ReplicationType.DOCUMENT);
createRepoAndSnapshot(REPOSITORY_NAME, FS_REPOSITORY_TYPE, SNAPSHOT_NAME, INDEX_NAME);

restoreSnapshot(
REPOSITORY_NAME,
SNAPSHOT_NAME,
INDEX_NAME,
RESTORED_INDEX_NAME,
Settings.builder()
.put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.SEGMENT)
.put(SETTING_NUMBER_OF_SEARCH_REPLICAS, 1)
.build()
);
ensureYellowAndNoInitializingShards(RESTORED_INDEX_NAME);
internalCluster().startDataOnlyNode();
ensureGreen(RESTORED_INDEX_NAME);
assertEquals(1, getNumberOfSearchReplicas(RESTORED_INDEX_NAME));

SearchResponse resp = client().prepareSearch(RESTORED_INDEX_NAME).setQuery(QueryBuilders.matchAllQuery()).get();
assertHitCount(resp, DOC_COUNT);
}

public void testSearchReplicaRestore_WhenSnapshotOnSegRep_RestoreOnDocRepWithSearchReplica() throws Exception {
bootstrapIndexWithOutSearchReplicas(ReplicationType.SEGMENT);
createRepoAndSnapshot(REPOSITORY_NAME, FS_REPOSITORY_TYPE, SNAPSHOT_NAME, INDEX_NAME);

SnapshotRestoreException exception = expectThrows(
SnapshotRestoreException.class,
() -> restoreSnapshot(
REPOSITORY_NAME,
SNAPSHOT_NAME,
INDEX_NAME,
RESTORED_INDEX_NAME,
Settings.builder()
.put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.DOCUMENT)
.put(SETTING_NUMBER_OF_SEARCH_REPLICAS, 1)
.build()
)
);
assertTrue(exception.getMessage().contains(getSnapshotExceptionMessage(ReplicationType.SEGMENT, ReplicationType.DOCUMENT)));
}

public void testSearchReplicaRestore_WhenSnapshotOnSegRep_RestoreOnSegRepWithSearchReplica() throws Exception {
bootstrapIndexWithOutSearchReplicas(ReplicationType.SEGMENT);
createRepoAndSnapshot(REPOSITORY_NAME, FS_REPOSITORY_TYPE, SNAPSHOT_NAME, INDEX_NAME);

restoreSnapshot(
REPOSITORY_NAME,
SNAPSHOT_NAME,
INDEX_NAME,
RESTORED_INDEX_NAME,
Settings.builder().put(SETTING_NUMBER_OF_SEARCH_REPLICAS, 1).build()
);
ensureYellowAndNoInitializingShards(RESTORED_INDEX_NAME);
internalCluster().startDataOnlyNode();
ensureGreen(RESTORED_INDEX_NAME);
assertEquals(1, getNumberOfSearchReplicas(RESTORED_INDEX_NAME));

SearchResponse resp = client().prepareSearch(RESTORED_INDEX_NAME).setQuery(QueryBuilders.matchAllQuery()).get();
assertHitCount(resp, DOC_COUNT);
}

public void testSearchReplicaRestore_WhenSnapshotOnSegRepWithSearchReplica_RestoreOnDocRep() throws Exception {
bootstrapIndexWithSearchReplicas();
createRepoAndSnapshot(REPOSITORY_NAME, FS_REPOSITORY_TYPE, SNAPSHOT_NAME, INDEX_NAME);

SnapshotRestoreException exception = expectThrows(
SnapshotRestoreException.class,
() -> restoreSnapshot(
REPOSITORY_NAME,
SNAPSHOT_NAME,
INDEX_NAME,
RESTORED_INDEX_NAME,
Settings.builder().put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.DOCUMENT).build()
)
);
assertTrue(exception.getMessage().contains(getSnapshotExceptionMessage(ReplicationType.SEGMENT, ReplicationType.DOCUMENT)));
}

public void testSearchReplicaRestore_WhenSnapshotOnSegRepWithSearchReplica_RestoreOnDocRepWithNoSearchReplica() throws Exception {
bootstrapIndexWithSearchReplicas();
createRepoAndSnapshot(REPOSITORY_NAME, FS_REPOSITORY_TYPE, SNAPSHOT_NAME, INDEX_NAME);

restoreSnapshot(
REPOSITORY_NAME,
SNAPSHOT_NAME,
INDEX_NAME,
RESTORED_INDEX_NAME,
Settings.builder()
.put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.DOCUMENT)
.put(SETTING_NUMBER_OF_SEARCH_REPLICAS, 0)
.build()
);
ensureGreen(RESTORED_INDEX_NAME);
assertEquals(0, getNumberOfSearchReplicas(RESTORED_INDEX_NAME));

SearchResponse resp = client().prepareSearch(RESTORED_INDEX_NAME).setQuery(QueryBuilders.matchAllQuery()).get();
assertHitCount(resp, DOC_COUNT);
}

private void bootstrapIndexWithOutSearchReplicas(ReplicationType replicationType) throws InterruptedException {
startCluster(2);

Settings settings = Settings.builder()
.put(super.indexSettings())
.put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1)
.put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1)
.put(SETTING_NUMBER_OF_SEARCH_REPLICAS, 0)
.put(IndexMetadata.SETTING_REPLICATION_TYPE, replicationType)
.build();

createIndex(INDEX_NAME, settings);
indexRandomDocs(INDEX_NAME, DOC_COUNT);
refresh(INDEX_NAME);
ensureGreen(INDEX_NAME);
}

private void bootstrapIndexWithSearchReplicas() throws InterruptedException {
startCluster(3);

Settings settings = Settings.builder()
.put(super.indexSettings())
.put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1)
.put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1)
.put(SETTING_NUMBER_OF_SEARCH_REPLICAS, 1)
.put(IndexMetadata.SETTING_REPLICATION_TYPE, ReplicationType.SEGMENT)
.build();

createIndex(INDEX_NAME, settings);
ensureGreen(INDEX_NAME);
for (int i = 0; i < DOC_COUNT; i++) {
client().prepareIndex(INDEX_NAME).setId(String.valueOf(i)).setSource("foo", "bar").get();
}
flushAndRefresh(INDEX_NAME);
}

private void startCluster(int numOfNodes) {
internalCluster().startClusterManagerOnlyNode();
internalCluster().startDataOnlyNodes(numOfNodes);
}

private void createRepoAndSnapshot(String repositoryName, String repositoryType, String snapshotName, String indexName) {
createRepository(repositoryName, repositoryType, randomRepoPath().toAbsolutePath());
createSnapshot(repositoryName, snapshotName, List.of(indexName));
assertAcked(client().admin().indices().prepareDelete(INDEX_NAME));
assertFalse("index [" + INDEX_NAME + "] should have been deleted", indexExists(INDEX_NAME));
}

private String getSnapshotExceptionMessage(ReplicationType snapshotReplicationType, ReplicationType restoreReplicationType) {
return "snapshot was created with [index.replication.type] as ["
+ snapshotReplicationType
+ "]. "
+ "To restore with [index.replication.type] as ["
+ restoreReplicationType
+ "], "
+ "[index.number_of_search_only_replicas] must be set to [0]";
}

private int getNumberOfSearchReplicas(String index) {
Metadata metadata = client().admin().cluster().prepareState().get().getState().metadata();
return Integer.valueOf(metadata.index(index).getSettings().get(SETTING_NUMBER_OF_SEARCH_REPLICAS));
}
}
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Expand Up @@ -572,6 +572,17 @@ private Builder initializeAsRestore(
);
}
}
for (int i = 0; i < indexMetadata.getNumberOfSearchOnlyReplicas(); i++) {
indexShardRoutingBuilder.addShard(
ShardRouting.newUnassigned(
shardId,
false,
true,
PeerRecoverySource.INSTANCE, // TODO: Update to remote store if enabled
unassignedInfo
)
);
}
shards.put(shardNumber, indexShardRoutingBuilder.build());
}
return this;
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36 changes: 36 additions & 0 deletions server/src/main/java/org/opensearch/snapshots/RestoreService.java
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Expand Up @@ -93,6 +93,7 @@
import org.opensearch.index.store.remote.filecache.FileCacheStats;
import org.opensearch.indices.IndicesService;
import org.opensearch.indices.ShardLimitValidator;
import org.opensearch.indices.replication.common.ReplicationType;
import org.opensearch.node.remotestore.RemoteStoreNodeAttribute;
import org.opensearch.node.remotestore.RemoteStoreNodeService;
import org.opensearch.repositories.IndexId;
Expand Down Expand Up @@ -121,10 +122,12 @@
import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_HISTORY_UUID;
import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_INDEX_UUID;
import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_REPLICAS;
import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_SEARCH_REPLICAS;
import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_SHARDS;
import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_REMOTE_SEGMENT_STORE_REPOSITORY;
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.cluster.metadata.IndexMetadata.SETTING_VERSION_CREATED;
import static org.opensearch.cluster.metadata.IndexMetadata.SETTING_VERSION_UPGRADED;
import static org.opensearch.common.util.FeatureFlags.SEARCHABLE_SNAPSHOT_EXTENDED_COMPATIBILITY;
Expand Down Expand Up @@ -413,6 +416,13 @@ public ClusterState execute(ClusterState currentState) {
overrideSettingsInternal,
ignoreSettingsInternal
);

validateReplicationTypeRestoreSettings(
snapshot,
metadata.index(index).getSettings().get(SETTING_REPLICATION_TYPE),
snapshotIndexMetadata
);

if (isRemoteSnapshot) {
snapshotIndexMetadata = addSnapshotToIndexSettings(snapshotIndexMetadata, snapshot, snapshotIndexId);
}
Expand Down Expand Up @@ -1320,6 +1330,32 @@ private static void validateSnapshotRestorable(final String repository, final Sn
}
}

// Visible for testing
static void validateReplicationTypeRestoreSettings(Snapshot snapshot, String snapshotReplicationType, IndexMetadata updatedMetadata) {
int restoreNumberOfSearchReplicas = updatedMetadata.getSettings().getAsInt(SETTING_NUMBER_OF_SEARCH_REPLICAS, 0);

if (restoreNumberOfSearchReplicas > 0
&& ReplicationType.DOCUMENT.toString().equals(updatedMetadata.getSettings().get(SETTING_REPLICATION_TYPE))) {
throw new SnapshotRestoreException(
snapshot,
"snapshot was created with ["
+ SETTING_REPLICATION_TYPE
+ "]"
+ " as ["
+ snapshotReplicationType
+ "]."
+ " To restore with ["
+ SETTING_REPLICATION_TYPE
+ "]"
+ " as ["
+ ReplicationType.DOCUMENT
+ "], ["
+ SETTING_NUMBER_OF_SEARCH_REPLICAS
+ "] must be set to [0]"
);
}
}

public static boolean failed(SnapshotInfo snapshot, String index) {
for (SnapshotShardFailure failure : snapshot.shardFailures()) {
if (index.equals(failure.index())) {
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/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/

package org.opensearch.cluster.routing;

import org.opensearch.Version;
import org.opensearch.cluster.ClusterName;
import org.opensearch.cluster.ClusterState;
import org.opensearch.cluster.metadata.IndexMetadata;
import org.opensearch.cluster.metadata.Metadata;
import org.opensearch.common.UUIDs;
import org.opensearch.common.settings.Settings;
import org.opensearch.repositories.IndexId;
import org.opensearch.snapshots.Snapshot;
import org.opensearch.snapshots.SnapshotId;
import org.opensearch.test.OpenSearchTestCase;

import java.util.HashSet;

public class SearchOnlyReplicaRestoreTests extends OpenSearchTestCase {

public void testSearchOnlyReplicasRestored() {
Metadata metadata = Metadata.builder()
.put(
IndexMetadata.builder("test")
.settings(settings(Version.CURRENT))
.numberOfShards(1)
.numberOfReplicas(1)
.numberOfSearchReplicas(1)
)
.build();

IndexMetadata indexMetadata = metadata.index("test");
RecoverySource.SnapshotRecoverySource snapshotRecoverySource = new RecoverySource.SnapshotRecoverySource(
UUIDs.randomBase64UUID(),
new Snapshot("rep1", new SnapshotId("snp1", UUIDs.randomBase64UUID())),
Version.CURRENT,
new IndexId("test", UUIDs.randomBase64UUID(random()))
);

RoutingTable routingTable = RoutingTable.builder().addAsNewRestore(indexMetadata, snapshotRecoverySource, new HashSet<>()).build();

ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY))
.metadata(metadata)
.routingTable(routingTable)
.build();

IndexShardRoutingTable indexShardRoutingTable = clusterState.routingTable().index("test").shard(0);

assertEquals(1, clusterState.routingTable().index("test").shards().size());
assertEquals(3, indexShardRoutingTable.getShards().size());
assertEquals(1, indexShardRoutingTable.searchOnlyReplicas().size());
}
}
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