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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.cluster.metadata;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.delete.DeleteIndexClusterStateUpdateRequest;
import org.elasticsearch.action.support.master.AcknowledgedResponse;
import org.elasticsearch.cluster.AckedClusterStateUpdateTask;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.RestoreInProgress;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.set.Sets;
import org.elasticsearch.index.Index;
import org.elasticsearch.snapshots.RestoreService;
import org.elasticsearch.snapshots.SnapshotInProgressException;
import org.elasticsearch.snapshots.SnapshotsService;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* Deletes indices.
*/
public class MetadataDeleteIndexService {
private static final Logger logger = LogManager.getLogger(MetadataDeleteIndexService.class);
private final Settings settings;
private final ClusterService clusterService;
private final AllocationService allocationService;
@Inject
public MetadataDeleteIndexService(Settings settings, ClusterService clusterService, AllocationService allocationService) {
this.settings = settings;
this.clusterService = clusterService;
this.allocationService = allocationService;
}
public void deleteIndices(final DeleteIndexClusterStateUpdateRequest request, final ActionListener listener) {
if (request.indices() == null || request.indices().length == 0) {
throw new IllegalArgumentException("Index name is required");
}
clusterService.submitStateUpdateTask(
"delete-index " + Arrays.toString(request.indices()),
new AckedClusterStateUpdateTask(Priority.URGENT, request, listener) {
@Override
public ClusterState execute(final ClusterState currentState) {
return deleteIndices(currentState, Sets.newHashSet(request.indices()));
}
}
);
}
/**
* Delete some indices from the cluster state.
*/
public ClusterState deleteIndices(ClusterState currentState, Set indices) {
final Metadata meta = currentState.metadata();
final Set indicesToDelete = new HashSet<>();
final Map backingIndices = new HashMap<>();
for (Index index : indices) {
IndexMetadata im = meta.getIndexSafe(index);
IndexAbstraction.DataStream parent = meta.getIndicesLookup().get(im.getIndex().getName()).getParentDataStream();
if (parent != null) {
if (parent.getWriteIndex().equals(im.getIndex())) {
throw new IllegalArgumentException(
"index ["
+ index.getName()
+ "] is the write index for data stream ["
+ parent.getName()
+ "] and cannot be deleted"
);
} else {
backingIndices.put(index, parent.getDataStream());
}
}
indicesToDelete.add(im.getIndex());
}
// Check if index deletion conflicts with any running snapshots
Set snapshottingIndices = SnapshotsService.snapshottingIndices(currentState, indicesToDelete);
if (snapshottingIndices.isEmpty() == false) {
throw new SnapshotInProgressException(
"Cannot delete indices that are being snapshotted: "
+ snapshottingIndices
+ ". Try again after snapshot finishes or cancel the currently running snapshot."
);
}
RoutingTable.Builder routingTableBuilder = RoutingTable.builder(currentState.routingTable());
Metadata.Builder metadataBuilder = Metadata.builder(meta);
ClusterBlocks.Builder clusterBlocksBuilder = ClusterBlocks.builder().blocks(currentState.blocks());
final IndexGraveyard.Builder graveyardBuilder = IndexGraveyard.builder(metadataBuilder.indexGraveyard());
final int previousGraveyardSize = graveyardBuilder.tombstones().size();
for (final Index index : indices) {
String indexName = index.getName();
logger.info("{} deleting index", index);
routingTableBuilder.remove(indexName);
clusterBlocksBuilder.removeIndexBlocks(indexName);
metadataBuilder.remove(indexName);
if (backingIndices.containsKey(index)) {
DataStream parent = metadataBuilder.dataStream(backingIndices.get(index).getName());
metadataBuilder.put(parent.removeBackingIndex(index));
}
}
// add tombstones to the cluster state for each deleted index
final IndexGraveyard currentGraveyard = graveyardBuilder.addTombstones(indices).build(settings);
metadataBuilder.indexGraveyard(currentGraveyard); // the new graveyard set on the metadata
logger.trace(
"{} tombstones purged from the cluster state. Previous tombstone size: {}. Current tombstone size: {}.",
graveyardBuilder.getNumPurged(),
previousGraveyardSize,
currentGraveyard.getTombstones().size()
);
Metadata newMetadata = metadataBuilder.build();
ClusterBlocks blocks = clusterBlocksBuilder.build();
// update snapshot restore entries
ImmutableOpenMap customs = currentState.getCustoms();
final RestoreInProgress restoreInProgress = currentState.custom(RestoreInProgress.TYPE, RestoreInProgress.EMPTY);
RestoreInProgress updatedRestoreInProgress = RestoreService.updateRestoreStateWithDeletedIndices(restoreInProgress, indices);
if (updatedRestoreInProgress != restoreInProgress) {
ImmutableOpenMap.Builder builder = ImmutableOpenMap.builder(customs);
builder.put(RestoreInProgress.TYPE, updatedRestoreInProgress);
customs = builder.build();
}
return allocationService.reroute(
ClusterState.builder(currentState)
.routingTable(routingTableBuilder.build())
.metadata(newMetadata)
.blocks(blocks)
.customs(customs)
.build(),
"deleted indices [" + indices + "]"
);
}
}