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SnapshotsService.java
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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.
*/
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.snapshots;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.opensearch.ExceptionsHelper;
import org.opensearch.Version;
import org.opensearch.action.ActionRunnable;
import org.opensearch.action.LatchedActionListener;
import org.opensearch.action.StepListener;
import org.opensearch.action.admin.cluster.snapshots.clone.CloneSnapshotRequest;
import org.opensearch.action.admin.cluster.snapshots.create.CreateSnapshotRequest;
import org.opensearch.action.admin.cluster.snapshots.delete.DeleteSnapshotRequest;
import org.opensearch.action.support.ActionFilters;
import org.opensearch.action.support.GroupedActionListener;
import org.opensearch.action.support.clustermanager.TransportClusterManagerNodeAction;
import org.opensearch.cluster.ClusterChangedEvent;
import org.opensearch.cluster.ClusterState;
import org.opensearch.cluster.ClusterStateApplier;
import org.opensearch.cluster.ClusterStateTaskConfig;
import org.opensearch.cluster.ClusterStateTaskExecutor;
import org.opensearch.cluster.ClusterStateTaskListener;
import org.opensearch.cluster.ClusterStateUpdateTask;
import org.opensearch.cluster.NotClusterManagerException;
import org.opensearch.cluster.RepositoryCleanupInProgress;
import org.opensearch.cluster.RestoreInProgress;
import org.opensearch.cluster.SnapshotDeletionsInProgress;
import org.opensearch.cluster.SnapshotsInProgress;
import org.opensearch.cluster.SnapshotsInProgress.ShardSnapshotStatus;
import org.opensearch.cluster.SnapshotsInProgress.ShardState;
import org.opensearch.cluster.SnapshotsInProgress.State;
import org.opensearch.cluster.block.ClusterBlockException;
import org.opensearch.cluster.coordination.FailedToCommitClusterStateException;
import org.opensearch.cluster.metadata.DataStream;
import org.opensearch.cluster.metadata.IndexMetadata;
import org.opensearch.cluster.metadata.IndexNameExpressionResolver;
import org.opensearch.cluster.metadata.Metadata;
import org.opensearch.cluster.metadata.RepositoriesMetadata;
import org.opensearch.cluster.node.DiscoveryNode;
import org.opensearch.cluster.node.DiscoveryNodes;
import org.opensearch.cluster.routing.IndexRoutingTable;
import org.opensearch.cluster.routing.IndexShardRoutingTable;
import org.opensearch.cluster.routing.RoutingTable;
import org.opensearch.cluster.routing.ShardRouting;
import org.opensearch.cluster.service.ClusterManagerTaskKeys;
import org.opensearch.cluster.service.ClusterManagerTaskThrottler;
import org.opensearch.cluster.service.ClusterService;
import org.opensearch.common.Nullable;
import org.opensearch.common.Priority;
import org.opensearch.common.SetOnce;
import org.opensearch.common.UUIDs;
import org.opensearch.common.collect.Tuple;
import org.opensearch.common.lifecycle.AbstractLifecycleComponent;
import org.opensearch.common.regex.Regex;
import org.opensearch.common.settings.Setting;
import org.opensearch.common.settings.Settings;
import org.opensearch.common.unit.TimeValue;
import org.opensearch.common.util.concurrent.AbstractRunnable;
import org.opensearch.core.action.ActionListener;
import org.opensearch.core.common.Strings;
import org.opensearch.core.common.io.stream.StreamInput;
import org.opensearch.core.index.Index;
import org.opensearch.core.index.shard.ShardId;
import org.opensearch.index.store.RemoteSegmentStoreDirectoryFactory;
import org.opensearch.index.store.lockmanager.RemoteStoreLockManagerFactory;
import org.opensearch.indices.RemoteStoreSettings;
import org.opensearch.node.remotestore.RemoteStorePinnedTimestampService;
import org.opensearch.repositories.IndexId;
import org.opensearch.repositories.RepositoriesService;
import org.opensearch.repositories.Repository;
import org.opensearch.repositories.RepositoryData;
import org.opensearch.repositories.RepositoryException;
import org.opensearch.repositories.RepositoryMissingException;
import org.opensearch.repositories.RepositoryShardId;
import org.opensearch.repositories.ShardGenerations;
import org.opensearch.threadpool.ThreadPool;
import org.opensearch.transport.TransportService;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Deque;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static java.util.Collections.emptySet;
import static java.util.Collections.unmodifiableList;
import static org.opensearch.cluster.SnapshotsInProgress.completed;
import static org.opensearch.common.util.IndexUtils.filterIndices;
import static org.opensearch.node.remotestore.RemoteStoreNodeService.CompatibilityMode;
import static org.opensearch.node.remotestore.RemoteStoreNodeService.REMOTE_STORE_COMPATIBILITY_MODE_SETTING;
import static org.opensearch.repositories.blobstore.BlobStoreRepository.REMOTE_STORE_INDEX_SHALLOW_COPY;
import static org.opensearch.repositories.blobstore.BlobStoreRepository.SHALLOW_SNAPSHOT_V2;
import static org.opensearch.repositories.blobstore.BlobStoreRepository.SHARD_PATH_TYPE;
import static org.opensearch.snapshots.SnapshotUtils.validateSnapshotsBackingAnyIndex;
/**
* Service responsible for creating snapshots. This service runs all the steps executed on the cluster-manager node during snapshot creation and
* deletion.
* See package level documentation of {@link org.opensearch.snapshots} for details.
*
* @opensearch.internal
*/
public class SnapshotsService extends AbstractLifecycleComponent implements ClusterStateApplier {
private static final Logger logger = LogManager.getLogger(SnapshotsService.class);
public static final String UPDATE_SNAPSHOT_STATUS_ACTION_NAME = "internal:cluster/snapshot/update_snapshot_status";
private final ClusterService clusterService;
private final IndexNameExpressionResolver indexNameExpressionResolver;
private final RepositoriesService repositoriesService;
private final RemoteStoreLockManagerFactory remoteStoreLockManagerFactory;
private final RemoteSegmentStoreDirectoryFactory remoteSegmentStoreDirectoryFactory;
private final ThreadPool threadPool;
private final Map<Snapshot, List<ActionListener<Tuple<RepositoryData, SnapshotInfo>>>> snapshotCompletionListeners =
new ConcurrentHashMap<>();
/**
* Listeners for snapshot deletion keyed by delete uuid as returned from {@link SnapshotDeletionsInProgress.Entry#uuid()}
*/
private final Map<String, List<ActionListener<Void>>> snapshotDeletionListeners = new HashMap<>();
// Set of repositories currently running either a snapshot finalization or a snapshot delete.
private final Set<String> currentlyFinalizing = Collections.synchronizedSet(new HashSet<>());
// Set of snapshots that are currently being ended by this node
private final Set<Snapshot> endingSnapshots = Collections.synchronizedSet(new HashSet<>());
// Set of currently initializing clone operations
private final Set<Snapshot> initializingClones = Collections.synchronizedSet(new HashSet<>());
private final UpdateSnapshotStatusAction updateSnapshotStatusHandler;
private final TransportService transportService;
private final RemoteStorePinnedTimestampService remoteStorePinnedTimestampService;
private final OngoingRepositoryOperations repositoryOperations = new OngoingRepositoryOperations();
private final ClusterManagerTaskThrottler.ThrottlingKey createSnapshotTaskKey;
private final ClusterManagerTaskThrottler.ThrottlingKey deleteSnapshotTaskKey;
private static ClusterManagerTaskThrottler.ThrottlingKey updateSnapshotStateTaskKey;
/**
* Setting that specifies the maximum number of allowed concurrent snapshot create and delete operations in the
* cluster state. The number of concurrent operations in a cluster state is defined as the sum of the sizes of
* {@link SnapshotsInProgress#entries()} and {@link SnapshotDeletionsInProgress#getEntries()}.
*/
public static final Setting<Integer> MAX_CONCURRENT_SNAPSHOT_OPERATIONS_SETTING = Setting.intSetting(
"snapshot.max_concurrent_operations",
1000,
1,
Setting.Property.NodeScope,
Setting.Property.Dynamic
);
public static final String SNAPSHOT_PINNED_TIMESTAMP_DELIMITER = "__";
/**
* Setting to specify the maximum number of shards that can be included in the result for the snapshot status
* API call. Note that it does not apply to V2-shallow snapshots.
*/
public static final Setting<Integer> MAX_SHARDS_ALLOWED_IN_STATUS_API = Setting.intSetting(
"snapshot.max_shards_allowed_in_status_api",
200000,
1,
Setting.Property.NodeScope,
Setting.Property.Dynamic
);
private volatile int maxConcurrentOperations;
public SnapshotsService(
Settings settings,
ClusterService clusterService,
IndexNameExpressionResolver indexNameExpressionResolver,
RepositoriesService repositoriesService,
TransportService transportService,
ActionFilters actionFilters,
@Nullable RemoteStorePinnedTimestampService remoteStorePinnedTimestampService,
RemoteStoreSettings remoteStoreSettings
) {
this.clusterService = clusterService;
this.indexNameExpressionResolver = indexNameExpressionResolver;
this.repositoriesService = repositoriesService;
this.remoteStoreLockManagerFactory = new RemoteStoreLockManagerFactory(
() -> repositoriesService,
remoteStoreSettings.getSegmentsPathFixedPrefix()
);
this.threadPool = transportService.getThreadPool();
this.remoteSegmentStoreDirectoryFactory = new RemoteSegmentStoreDirectoryFactory(
() -> repositoriesService,
threadPool,
remoteStoreSettings.getSegmentsPathFixedPrefix()
);
this.transportService = transportService;
this.remoteStorePinnedTimestampService = remoteStorePinnedTimestampService;
// The constructor of UpdateSnapshotStatusAction will register itself to the TransportService.
this.updateSnapshotStatusHandler = new UpdateSnapshotStatusAction(
transportService,
clusterService,
threadPool,
actionFilters,
indexNameExpressionResolver
);
if (DiscoveryNode.isClusterManagerNode(settings)) {
// addLowPriorityApplier to make sure that Repository will be created before snapshot
clusterService.addLowPriorityApplier(this);
maxConcurrentOperations = MAX_CONCURRENT_SNAPSHOT_OPERATIONS_SETTING.get(settings);
clusterService.getClusterSettings()
.addSettingsUpdateConsumer(MAX_CONCURRENT_SNAPSHOT_OPERATIONS_SETTING, i -> maxConcurrentOperations = i);
}
// Task is onboarded for throttling, it will get retried from associated TransportClusterManagerNodeAction.
createSnapshotTaskKey = clusterService.registerClusterManagerTask(ClusterManagerTaskKeys.CREATE_SNAPSHOT_KEY, true);
deleteSnapshotTaskKey = clusterService.registerClusterManagerTask(ClusterManagerTaskKeys.DELETE_SNAPSHOT_KEY, true);
updateSnapshotStateTaskKey = clusterService.registerClusterManagerTask(ClusterManagerTaskKeys.UPDATE_SNAPSHOT_STATE_KEY, true);
}
/**
* Same as {@link #createSnapshot(CreateSnapshotRequest, ActionListener)} but invokes its callback on completion of
* the snapshot.
*
* @param request snapshot request
* @param listener snapshot completion listener
*/
public void executeSnapshot(final CreateSnapshotRequest request, final ActionListener<SnapshotInfo> listener) {
Repository repository = repositoriesService.repository(request.repository());
boolean isSnapshotV2 = SHALLOW_SNAPSHOT_V2.get(repository.getMetadata().settings());
logger.debug("shallow_snapshot_v2 is set as [{}]", isSnapshotV2);
boolean remoteStoreIndexShallowCopy = remoteStoreShallowCopyEnabled(repository);
if (remoteStoreIndexShallowCopy
&& isSnapshotV2
&& request.indices().length == 0
&& clusterService.state().nodes().getMinNodeVersion().onOrAfter(Version.V_2_17_0)) {
createSnapshotV2(request, listener);
} else {
createSnapshot(
request,
ActionListener.wrap(snapshot -> addListener(snapshot, ActionListener.map(listener, Tuple::v2)), listener::onFailure)
);
}
}
private boolean remoteStoreShallowCopyEnabled(Repository repository) {
boolean remoteStoreIndexShallowCopy = REMOTE_STORE_INDEX_SHALLOW_COPY.get(repository.getMetadata().settings());
logger.debug("remote_store_index_shallow_copy setting is set as [{}]", remoteStoreIndexShallowCopy);
if (remoteStoreIndexShallowCopy
&& clusterService.getClusterSettings().get(REMOTE_STORE_COMPATIBILITY_MODE_SETTING).equals(CompatibilityMode.MIXED)) {
// don't allow shallow snapshots if compatibility mode is not strict
logger.warn("Shallow snapshots are not supported during migration. Falling back to full snapshot.");
remoteStoreIndexShallowCopy = false;
}
return remoteStoreIndexShallowCopy;
}
/**
* Initializes the snapshotting process.
* <p>
* This method is used by clients to start snapshot. It makes sure that there is no snapshots are currently running and
* creates a snapshot record in cluster state metadata.
* </p>
*
* @param request snapshot request
* @param listener snapshot creation listener
*/
public void createSnapshot(final CreateSnapshotRequest request, final ActionListener<Snapshot> listener) {
final String repositoryName = request.repository();
final String snapshotName = indexNameExpressionResolver.resolveDateMathExpression(request.snapshot());
validate(repositoryName, snapshotName);
// TODO: create snapshot UUID in CreateSnapshotRequest and make this operation idempotent to cleanly deal with transport layer
// retries
final SnapshotId snapshotId = new SnapshotId(snapshotName, UUIDs.randomBase64UUID()); // new UUID for the snapshot
Repository repository = repositoriesService.repository(request.repository());
if (repository.isReadOnly()) {
listener.onFailure(new RepositoryException(repository.getMetadata().name(), "cannot create snapshot in a readonly repository"));
return;
}
final Snapshot snapshot = new Snapshot(repositoryName, snapshotId);
final Map<String, Object> userMeta = repository.adaptUserMetadata(request.userMetadata());
repository.executeConsistentStateUpdate(repositoryData -> new ClusterStateUpdateTask() {
private SnapshotsInProgress.Entry newEntry;
@Override
public ClusterState execute(ClusterState currentState) {
createSnapshotPreValidations(currentState, repositoryData, repositoryName, snapshotName);
final SnapshotsInProgress snapshots = currentState.custom(SnapshotsInProgress.TYPE, SnapshotsInProgress.EMPTY);
final List<SnapshotsInProgress.Entry> runningSnapshots = snapshots.entries();
final SnapshotDeletionsInProgress deletionsInProgress = currentState.custom(
SnapshotDeletionsInProgress.TYPE,
SnapshotDeletionsInProgress.EMPTY
);
ensureBelowConcurrencyLimit(repositoryName, snapshotName, snapshots, deletionsInProgress);
// Store newSnapshot here to be processed in clusterStateProcessed
List<String> indices = Arrays.asList(indexNameExpressionResolver.concreteIndexNames(currentState, request));
final List<String> dataStreams = indexNameExpressionResolver.dataStreamNames(
currentState,
request.indicesOptions(),
request.indices()
);
logger.trace("[{}][{}] creating snapshot for indices [{}]", repositoryName, snapshotName, indices);
int pathType = clusterService.state().nodes().getMinNodeVersion().onOrAfter(Version.V_2_17_0)
? SHARD_PATH_TYPE.get(repository.getMetadata().settings()).getCode()
: IndexId.DEFAULT_SHARD_PATH_TYPE;
final List<IndexId> indexIds = repositoryData.resolveNewIndices(
indices,
getInFlightIndexIds(runningSnapshots, repositoryName),
pathType
);
final Version version = minCompatibleVersion(currentState.nodes().getMinNodeVersion(), repositoryData, null);
final Map<ShardId, ShardSnapshotStatus> shards = shards(
snapshots,
deletionsInProgress,
currentState.metadata(),
currentState.routingTable(),
indexIds,
repositoryData,
repositoryName
);
if (request.partial() == false) {
Set<String> missing = new HashSet<>();
for (final Map.Entry<ShardId, ShardSnapshotStatus> entry : shards.entrySet()) {
if (entry.getValue().state() == ShardState.MISSING) {
missing.add(entry.getKey().getIndex().getName());
}
}
if (missing.isEmpty() == false) {
throw new SnapshotException(
new Snapshot(repositoryName, snapshotId),
"Indices don't have primary shards " + missing
);
}
}
boolean remoteStoreIndexShallowCopy = REMOTE_STORE_INDEX_SHALLOW_COPY.get(repository.getMetadata().settings());
logger.debug("remote_store_index_shallow_copy setting is set as [{}]", remoteStoreIndexShallowCopy);
if (remoteStoreIndexShallowCopy
&& clusterService.getClusterSettings().get(REMOTE_STORE_COMPATIBILITY_MODE_SETTING).equals(CompatibilityMode.MIXED)) {
// don't allow shallow snapshots if compatibility mode is not strict
logger.warn("Shallow snapshots are not supported during migration. Falling back to full snapshot.");
remoteStoreIndexShallowCopy = false;
}
newEntry = SnapshotsInProgress.startedEntry(
new Snapshot(repositoryName, snapshotId),
request.includeGlobalState(),
request.partial(),
indexIds,
dataStreams,
threadPool.absoluteTimeInMillis(),
repositoryData.getGenId(),
shards,
userMeta,
version,
remoteStoreIndexShallowCopy
);
final List<SnapshotsInProgress.Entry> newEntries = new ArrayList<>(runningSnapshots);
newEntries.add(newEntry);
return ClusterState.builder(currentState)
.putCustom(SnapshotsInProgress.TYPE, SnapshotsInProgress.of(new ArrayList<>(newEntries)))
.build();
}
@Override
public void onFailure(String source, Exception e) {
logger.warn(() -> new ParameterizedMessage("[{}][{}] failed to create snapshot", repositoryName, snapshotName), e);
listener.onFailure(e);
}
@Override
public ClusterManagerTaskThrottler.ThrottlingKey getClusterManagerThrottlingKey() {
return createSnapshotTaskKey;
}
@Override
public void clusterStateProcessed(String source, ClusterState oldState, final ClusterState newState) {
try {
logger.info("snapshot [{}] started", snapshot);
listener.onResponse(snapshot);
} finally {
if (newEntry.state().completed()) {
endSnapshot(newEntry, newState.metadata(), repositoryData);
}
}
}
@Override
public TimeValue timeout() {
return request.clusterManagerNodeTimeout();
}
}, "create_snapshot [" + snapshotName + ']', () -> repositoriesService.repository(request.repository()), listener::onFailure);
}
/**
* Initializes the snapshotting process for clients when Snapshot v2 is enabled. This method is responsible for taking
* a shallow snapshot and pinning the snapshot timestamp.The entire process is executed on the cluster manager node.
*
* Unlike traditional snapshot operations, this method performs a synchronous snapshot execution and doesn't
* upload any shard metadata to the snapshot repository.
* The pinned timestamp is later reconciled with remote store segment and translog metadata files during the restore
* operation.
*
* @param request snapshot request
* @param listener snapshot creation listener
*/
public void createSnapshotV2(final CreateSnapshotRequest request, final ActionListener<SnapshotInfo> listener) {
final String repositoryName = request.repository();
final String snapshotName = indexNameExpressionResolver.resolveDateMathExpression(request.snapshot());
validate(repositoryName, snapshotName);
final SnapshotId snapshotId = new SnapshotId(snapshotName, UUIDs.randomBase64UUID()); // new UUID for the snapshot
Snapshot snapshot = new Snapshot(repositoryName, snapshotId);
long pinnedTimestamp = System.currentTimeMillis();
try {
updateSnapshotPinnedTimestamp(snapshot, pinnedTimestamp);
} catch (Exception e) {
listener.onFailure(e);
return;
}
Repository repository = repositoriesService.repository(repositoryName);
repository.executeConsistentStateUpdate(repositoryData -> new ClusterStateUpdateTask(Priority.URGENT) {
private SnapshotsInProgress.Entry newEntry;
boolean enteredLoop;
@Override
public ClusterState execute(ClusterState currentState) {
// move to in progress
Repository repository = repositoriesService.repository(repositoryName);
if (repository.isReadOnly()) {
listener.onFailure(
new RepositoryException(repository.getMetadata().name(), "cannot create snapshot-v2 in a readonly repository")
);
}
final Map<String, Object> userMeta = repository.adaptUserMetadata(request.userMetadata());
createSnapshotPreValidations(currentState, repositoryData, repositoryName, snapshotName);
List<String> indices = new ArrayList<>(currentState.metadata().indices().keySet());
final List<String> dataStreams = indexNameExpressionResolver.dataStreamNames(
currentState,
request.indicesOptions(),
request.indices()
);
logger.info("[{}][{}] creating snapshot-v2 for indices [{}]", repositoryName, snapshotName, indices);
final SnapshotsInProgress snapshots = currentState.custom(SnapshotsInProgress.TYPE, SnapshotsInProgress.EMPTY);
final List<SnapshotsInProgress.Entry> runningSnapshots = snapshots.entries();
final List<IndexId> indexIds = repositoryData.resolveNewIndices(
indices,
getInFlightIndexIds(runningSnapshots, repositoryName),
IndexId.DEFAULT_SHARD_PATH_TYPE
);
final Version version = minCompatibleVersion(currentState.nodes().getMinNodeVersion(), repositoryData, null);
if (repositoryData.getGenId() == RepositoryData.UNKNOWN_REPO_GEN) {
logger.debug("[{}] was aborted before starting", snapshot);
throw new SnapshotException(snapshot, "Aborted on initialization");
}
Map<ShardId, ShardSnapshotStatus> shards = new HashMap<>();
newEntry = SnapshotsInProgress.startedEntry(
new Snapshot(repositoryName, snapshotId),
request.includeGlobalState(),
request.partial(),
indexIds,
dataStreams,
threadPool.absoluteTimeInMillis(),
repositoryData.getGenId(),
shards,
userMeta,
version,
true,
true
);
final List<SnapshotsInProgress.Entry> newEntries = new ArrayList<>(runningSnapshots);
newEntries.add(newEntry);
// Entering finalize loop here to prevent concurrent snapshots v2 snapshots
enteredLoop = tryEnterRepoLoop(repositoryName);
if (enteredLoop == false) {
throw new ConcurrentSnapshotExecutionException(
repositoryName,
snapshotName,
"cannot start snapshot-v2 while a repository is in finalization state"
);
}
return ClusterState.builder(currentState)
.putCustom(SnapshotsInProgress.TYPE, SnapshotsInProgress.of(new ArrayList<>(newEntries)))
.build();
}
@Override
public void onFailure(String source, Exception e) {
logger.warn(() -> new ParameterizedMessage("[{}][{}] failed to create snapshot-v2", repositoryName, snapshotName), e);
listener.onFailure(e);
if (enteredLoop) {
leaveRepoLoop(repositoryName);
}
}
@Override
public void clusterStateProcessed(String source, ClusterState oldState, final ClusterState newState) {
final ShardGenerations shardGenerations = buildShardsGenerationFromRepositoryData(
newState.metadata(),
newState.routingTable(),
newEntry.indices(),
repositoryData
);
final List<String> dataStreams = indexNameExpressionResolver.dataStreamNames(
newState,
request.indicesOptions(),
request.indices()
);
final SnapshotInfo snapshotInfo = new SnapshotInfo(
snapshotId,
shardGenerations.indices().stream().map(IndexId::getName).collect(Collectors.toList()),
newEntry.dataStreams(),
pinnedTimestamp,
null,
System.currentTimeMillis(),
shardGenerations.totalShards(),
Collections.emptyList(),
request.includeGlobalState(),
newEntry.userMetadata(),
true,
pinnedTimestamp
);
final Version version = minCompatibleVersion(newState.nodes().getMinNodeVersion(), repositoryData, null);
repository.finalizeSnapshot(
shardGenerations,
repositoryData.getGenId(),
metadataForSnapshot(newState.metadata(), request.includeGlobalState(), false, dataStreams, newEntry.indices()),
snapshotInfo,
version,
state -> stateWithoutSnapshot(state, snapshot),
Priority.IMMEDIATE,
new ActionListener<RepositoryData>() {
@Override
public void onResponse(RepositoryData repositoryData) {
if (clusterService.state().nodes().isLocalNodeElectedClusterManager() == false) {
leaveRepoLoop(repositoryName);
failSnapshotCompletionListeners(
snapshot,
new SnapshotException(snapshot, "Aborting snapshot-v2, no longer cluster manager")
);
listener.onFailure(
new SnapshotException(repositoryName, snapshotName, "Aborting snapshot-v2, no longer cluster manager")
);
return;
}
cleanOrphanTimestamp(repositoryName, repositoryData);
logger.info("created snapshot-v2 [{}] in repository [{}]", repositoryName, snapshotName);
leaveRepoLoop(repositoryName);
listener.onResponse(snapshotInfo);
}
@Override
public void onFailure(Exception e) {
logger.error("Failed to finalize snapshot repo {} for snapshot-v2 {} ", repositoryName, snapshotName);
leaveRepoLoop(repositoryName);
// cleaning up in progress snapshot here
stateWithoutSnapshotV2(newState);
listener.onFailure(e);
}
}
);
}
@Override
public TimeValue timeout() {
return request.clusterManagerNodeTimeout();
}
}, "create_snapshot [" + snapshotName + ']', () -> repositoriesService.repository(repositoryName), listener::onFailure);
}
private void cleanOrphanTimestamp(String repoName, RepositoryData repositoryData) {
Collection<String> snapshotUUIDs = repositoryData.getSnapshotIds().stream().map(SnapshotId::getUUID).collect(Collectors.toSet());
Map<String, List<Long>> pinnedEntities = RemoteStorePinnedTimestampService.getPinnedEntities();
List<String> orphanPinnedEntities = pinnedEntities.keySet()
.stream()
.filter(pinnedEntity -> isOrphanPinnedEntity(repoName, snapshotUUIDs, pinnedEntity))
.collect(Collectors.toList());
if (orphanPinnedEntities.isEmpty()) {
return;
}
logger.info("Found {} orphan timestamps. Cleaning it up now", orphanPinnedEntities.size());
deleteOrphanTimestamps(pinnedEntities, orphanPinnedEntities);
}
static boolean isOrphanPinnedEntity(String repoName, Collection<String> snapshotUUIDs, String pinnedEntity) {
Tuple<String, String> tokens = getRepoSnapshotUUIDTuple(pinnedEntity);
return Objects.equals(tokens.v1(), repoName) && snapshotUUIDs.contains(tokens.v2()) == false;
}
private void deleteOrphanTimestamps(Map<String, List<Long>> pinnedEntities, List<String> orphanPinnedEntities) {
final CountDownLatch latch = new CountDownLatch(orphanPinnedEntities.size());
for (String pinnedEntity : orphanPinnedEntities) {
assert pinnedEntities.get(pinnedEntity).size() == 1 : "Multiple timestamps for same repo-snapshot uuid found";
long orphanTimestamp = pinnedEntities.get(pinnedEntity).get(0);
remoteStorePinnedTimestampService.unpinTimestamp(
orphanTimestamp,
pinnedEntity,
new LatchedActionListener<>(new ActionListener<>() {
@Override
public void onResponse(Void unused) {}
@Override
public void onFailure(Exception e) {}
}, latch)
);
}
try {
latch.await();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
private void createSnapshotPreValidations(
ClusterState currentState,
RepositoryData repositoryData,
String repositoryName,
String snapshotName
) {
Repository repository = repositoriesService.repository(repositoryName);
ensureSnapshotNameAvailableInRepo(repositoryData, snapshotName, repository);
final SnapshotsInProgress snapshots = currentState.custom(SnapshotsInProgress.TYPE, SnapshotsInProgress.EMPTY);
final List<SnapshotsInProgress.Entry> runningSnapshots = snapshots.entries();
ensureSnapshotNameNotRunning(runningSnapshots, repositoryName, snapshotName);
validate(repositoryName, snapshotName, currentState);
final RepositoryCleanupInProgress repositoryCleanupInProgress = currentState.custom(
RepositoryCleanupInProgress.TYPE,
RepositoryCleanupInProgress.EMPTY
);
if (repositoryCleanupInProgress.hasCleanupInProgress()) {
throw new ConcurrentSnapshotExecutionException(
repositoryName,
snapshotName,
"cannot snapshot-v2 while a repository cleanup is in-progress in [" + repositoryCleanupInProgress + "]"
);
}
ensureNoCleanupInProgress(currentState, repositoryName, snapshotName);
}
private void updateSnapshotPinnedTimestamp(Snapshot snapshot, long timestampToPin) throws Exception {
CountDownLatch latch = new CountDownLatch(1);
SetOnce<Exception> ex = new SetOnce<>();
ActionListener<Void> listener = new ActionListener<>() {
@Override
public void onResponse(Void unused) {
logger.debug("Timestamp pinned successfully for snapshot {}", snapshot.getSnapshotId().getName());
}
@Override
public void onFailure(Exception e) {
logger.error("Failed to pin timestamp for snapshot {} with exception {}", snapshot.getSnapshotId().getName(), e);
ex.set(e);
}
};
remoteStorePinnedTimestampService.pinTimestamp(
timestampToPin,
getPinningEntity(snapshot.getRepository(), snapshot.getSnapshotId().getUUID()),
new LatchedActionListener<>(listener, latch)
);
latch.await();
if (ex.get() != null) {
throw ex.get();
}
}
public static String getPinningEntity(String repositoryName, String snapshotUUID) {
return repositoryName + SNAPSHOT_PINNED_TIMESTAMP_DELIMITER + snapshotUUID;
}
public static Tuple<String, String> getRepoSnapshotUUIDTuple(String pinningEntity) {
String[] tokens = pinningEntity.split(SNAPSHOT_PINNED_TIMESTAMP_DELIMITER);
String snapUUID = String.join(SNAPSHOT_PINNED_TIMESTAMP_DELIMITER, Arrays.copyOfRange(tokens, 1, tokens.length));
return new Tuple<>(tokens[0], snapUUID);
}
private void cloneSnapshotPinnedTimestamp(
RepositoryData repositoryData,
SnapshotId sourceSnapshot,
Snapshot snapshot,
long timestampToPin,
ActionListener<RepositoryData> listener
) {
remoteStorePinnedTimestampService.cloneTimestamp(
timestampToPin,
getPinningEntity(snapshot.getRepository(), sourceSnapshot.getUUID()),
getPinningEntity(snapshot.getRepository(), snapshot.getSnapshotId().getUUID()),
new ActionListener<Void>() {
@Override
public void onResponse(Void unused) {
logger.debug("Timestamp pinned successfully for clone snapshot {}", snapshot.getSnapshotId().getName());
listener.onResponse(repositoryData);
}
@Override
public void onFailure(Exception e) {
logger.error("Failed to pin timestamp for clone snapshot {} with exception {}", snapshot.getSnapshotId().getName(), e);
listener.onFailure(e);
}
}
);
}
private static void ensureSnapshotNameNotRunning(
List<SnapshotsInProgress.Entry> runningSnapshots,
String repositoryName,
String snapshotName
) {
if (runningSnapshots.stream().anyMatch(s -> {
final Snapshot running = s.snapshot();
return running.getRepository().equals(repositoryName) && running.getSnapshotId().getName().equals(snapshotName);
})) {
throw new InvalidSnapshotNameException(repositoryName, snapshotName, "snapshot with the same name is already in-progress");
}
}
private static Map<String, IndexId> getInFlightIndexIds(List<SnapshotsInProgress.Entry> runningSnapshots, String repositoryName) {
return runningSnapshots.stream()
.filter(entry -> entry.repository().equals(repositoryName))
.flatMap(entry -> entry.indices().stream())
.distinct()
.collect(Collectors.toMap(IndexId::getName, Function.identity()));
}
/**
* This method does some pre-validation, checks for the presence of source snapshot in repository data.
* For shallow snapshot v2 clone, it checks the pinned timestamp to be greater than zero in the source snapshot.
*
* @param request snapshot request
* @param listener snapshot completion listener
*/
public void executeClone(CloneSnapshotRequest request, ActionListener<Void> listener) {
final String repositoryName = request.repository();
Repository repository = repositoriesService.repository(repositoryName);
if (repository.isReadOnly()) {
listener.onFailure(new RepositoryException(repositoryName, "cannot create snapshot in a readonly repository"));
return;
}
final String snapshotName = indexNameExpressionResolver.resolveDateMathExpression(request.target());
validate(repositoryName, snapshotName);
final SnapshotId snapshotId = new SnapshotId(snapshotName, UUIDs.randomBase64UUID());
final Snapshot snapshot = new Snapshot(repositoryName, snapshotId);
try {
final StepListener<RepositoryData> repositoryDataListener = new StepListener<>();
repositoriesService.getRepositoryData(repositoryName, repositoryDataListener);
repositoryDataListener.whenComplete(repositoryData -> {
final SnapshotId sourceSnapshotId = repositoryData.getSnapshotIds()
.stream()
.filter(src -> src.getName().equals(request.source()))
.findAny()
.orElseThrow(() -> new SnapshotMissingException(repositoryName, request.source()));
final StepListener<SnapshotInfo> snapshotInfoListener = new StepListener<>();
final Executor executor = threadPool.executor(ThreadPool.Names.SNAPSHOT);
executor.execute(ActionRunnable.supply(snapshotInfoListener, () -> repository.getSnapshotInfo(sourceSnapshotId)));
snapshotInfoListener.whenComplete(sourceSnapshotInfo -> {
if (sourceSnapshotInfo.getPinnedTimestamp() > 0) {
if (hasWildCardPatterForCloneSnapshotV2(request.indices()) == false) {
throw new SnapshotException(
repositoryName,
snapshotName,
"Aborting clone for Snapshot-v2, only wildcard pattern '*' is supported for indices"
);
}
cloneSnapshotV2(request, snapshot, repositoryName, repository, listener);
} else {
cloneSnapshot(request, snapshot, repositoryName, repository, listener);
}
}, e -> listener.onFailure(e));
}, e -> listener.onFailure(e));
} catch (Exception e) {
assert false : new AssertionError(e);
logger.error("Snapshot {} clone failed with exception {}", snapshot.getSnapshotId().getName(), e);
listener.onFailure(e);
}
}
/**
* This method is responsible for creating a clone of the shallow snapshot v2.
* It pins the same timestamp that is pinned by the source snapshot.
*
* Unlike traditional snapshot operations, this method performs a synchronous clone execution and doesn't
* upload any shard metadata to the snapshot repository.
* The pinned timestamp is later reconciled with remote store segment and translog metadata files during the restore
* operation.
*
* @param request snapshot request
* @param snapshot clone snapshot
* @param repositoryName snapshot repository name
* @param repository snapshot repository
* @param listener completion listener
*/
public void cloneSnapshotV2(
CloneSnapshotRequest request,
Snapshot snapshot,
String repositoryName,
Repository repository,
ActionListener<Void> listener
) {
long startTime = System.currentTimeMillis();
String snapshotName = snapshot.getSnapshotId().getName();
repository.executeConsistentStateUpdate(repositoryData -> new ClusterStateUpdateTask(Priority.URGENT) {
private SnapshotsInProgress.Entry newEntry;
private SnapshotId sourceSnapshotId;
private List<String> indicesForSnapshot;
boolean enteredRepoLoop;
@Override
public ClusterState execute(ClusterState currentState) {
createSnapshotPreValidations(currentState, repositoryData, repositoryName, snapshotName);
final SnapshotsInProgress snapshots = currentState.custom(SnapshotsInProgress.TYPE, SnapshotsInProgress.EMPTY);
final List<SnapshotsInProgress.Entry> runningSnapshots = snapshots.entries();
// Entering finalize loop here to prevent concurrent snapshots v2 snapshots
enteredRepoLoop = tryEnterRepoLoop(repositoryName);
if (enteredRepoLoop == false) {
throw new ConcurrentSnapshotExecutionException(
repositoryName,
snapshotName,
"cannot start snapshot-v2 while a repository is in finalization state"
);
}
sourceSnapshotId = repositoryData.getSnapshotIds()
.stream()
.filter(src -> src.getName().equals(request.source()))
.findAny()
.orElseThrow(() -> new SnapshotMissingException(repositoryName, request.source()));
final SnapshotDeletionsInProgress deletionsInProgress = currentState.custom(
SnapshotDeletionsInProgress.TYPE,
SnapshotDeletionsInProgress.EMPTY
);
if (deletionsInProgress.getEntries().stream().anyMatch(entry -> entry.getSnapshots().contains(sourceSnapshotId))) {
throw new ConcurrentSnapshotExecutionException(
repositoryName,
sourceSnapshotId.getName(),
"cannot clone from snapshot that is being deleted"
);
}
indicesForSnapshot = new ArrayList<>();
for (IndexId indexId : repositoryData.getIndices().values()) {
if (repositoryData.getSnapshots(indexId).contains(sourceSnapshotId)) {
indicesForSnapshot.add(indexId.getName());
}
}
newEntry = SnapshotsInProgress.startClone(
snapshot,
sourceSnapshotId,
repositoryData.resolveIndices(indicesForSnapshot),
threadPool.absoluteTimeInMillis(),
repositoryData.getGenId(),
minCompatibleVersion(currentState.nodes().getMinNodeVersion(), repositoryData, null),
true
);
final List<SnapshotsInProgress.Entry> newEntries = new ArrayList<>(runningSnapshots);
newEntries.add(newEntry);
return ClusterState.builder(currentState).putCustom(SnapshotsInProgress.TYPE, SnapshotsInProgress.of(newEntries)).build();
}
@Override
public void onFailure(String source, Exception e) {
logger.warn(() -> new ParameterizedMessage("[{}][{}] failed to clone snapshot-v2", repositoryName, snapshotName), e);
listener.onFailure(e);
if (enteredRepoLoop) {
leaveRepoLoop(repositoryName);
}
}
@Override
public void clusterStateProcessed(String source, ClusterState oldState, final ClusterState newState) {
logger.info("snapshot-v2 clone [{}] started", snapshot);
final StepListener<SnapshotInfo> snapshotInfoListener = new StepListener<>();
final Executor executor = threadPool.executor(ThreadPool.Names.SNAPSHOT);
executor.execute(ActionRunnable.supply(snapshotInfoListener, () -> repository.getSnapshotInfo(sourceSnapshotId)));
snapshotInfoListener.whenComplete(snapshotInfo -> {
final SnapshotInfo cloneSnapshotInfo = new SnapshotInfo(
snapshot.getSnapshotId(),
indicesForSnapshot,
newEntry.dataStreams(),
startTime,
null,
System.currentTimeMillis(),
snapshotInfo.totalShards(),
Collections.emptyList(),
newEntry.includeGlobalState(),
newEntry.userMetadata(),
true,
snapshotInfo.getPinnedTimestamp()
);
if (clusterService.state().nodes().isLocalNodeElectedClusterManager() == false) {
throw new SnapshotException(repositoryName, snapshotName, "Aborting snapshot-v2 clone, no longer cluster manager");
}
final StepListener<RepositoryData> pinnedTimestampListener = new StepListener<>();
final StepListener<Metadata> metadataListener = new StepListener<>();
pinnedTimestampListener.whenComplete(
rData -> threadPool.executor(ThreadPool.Names.SNAPSHOT).execute(ActionRunnable.supply(metadataListener, () -> {
final Metadata.Builder metaBuilder = Metadata.builder(repository.getSnapshotGlobalMetadata(newEntry.source()));
for (IndexId index : newEntry.indices()) {
metaBuilder.put(repository.getSnapshotIndexMetaData(repositoryData, newEntry.source(), index), false);
}
return metaBuilder.build();
})),
e -> {
logger.error("Failed to update pinned timestamp for snapshot-v2 {} {} ", repositoryName, snapshotName);
stateWithoutSnapshotV2(newState);
leaveRepoLoop(repositoryName);
listener.onFailure(e);
}
);
metadataListener.whenComplete(meta -> {
ShardGenerations shardGenerations = buildGenerationsV2(newEntry, meta);
repository.finalizeSnapshot(
shardGenerations,
repositoryData.getGenId(),
metadataForSnapshot(meta, newEntry.includeGlobalState(), false, newEntry.dataStreams(), newEntry.indices()),
cloneSnapshotInfo,
repositoryData.getVersion(sourceSnapshotId),