org.opensearch.cluster.routing.allocation.decider.RestoreInProgressAllocationDecider Maven / Gradle / Ivy
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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.
*/
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* this work for additional information regarding copyright
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* the Apache License, Version 2.0 (the "License"); you may
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*
* 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
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/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.cluster.routing.allocation.decider;
import org.opensearch.cluster.RestoreInProgress;
import org.opensearch.cluster.routing.RecoverySource;
import org.opensearch.cluster.routing.RoutingNode;
import org.opensearch.cluster.routing.ShardRouting;
import org.opensearch.cluster.routing.allocation.RoutingAllocation;
/**
* This {@link AllocationDecider} prevents shards that have failed to be
* restored from a snapshot to be allocated.
*/
public class RestoreInProgressAllocationDecider extends AllocationDecider {
public static final String NAME = "restore_in_progress";
@Override
public Decision canAllocate(final ShardRouting shardRouting, final RoutingNode node, final RoutingAllocation allocation) {
return canAllocate(shardRouting, allocation);
}
@Override
public Decision canAllocate(final ShardRouting shardRouting, final RoutingAllocation allocation) {
final RecoverySource recoverySource = shardRouting.recoverySource();
if (recoverySource == null || recoverySource.getType() != RecoverySource.Type.SNAPSHOT) {
return allocation.decision(Decision.YES, NAME, "ignored as shard is not being recovered from a snapshot");
}
final RecoverySource.SnapshotRecoverySource source = (RecoverySource.SnapshotRecoverySource) recoverySource;
if (source.restoreUUID().equals(RecoverySource.SnapshotRecoverySource.NO_API_RESTORE_UUID)) {
return allocation.decision(Decision.YES, NAME, "not an API-level restore");
}
final RestoreInProgress restoresInProgress = allocation.custom(RestoreInProgress.TYPE);
if (restoresInProgress != null) {
RestoreInProgress.Entry restoreInProgress = restoresInProgress.get(source.restoreUUID());
if (restoreInProgress != null) {
RestoreInProgress.ShardRestoreStatus shardRestoreStatus = restoreInProgress.shards().get(shardRouting.shardId());
if (shardRestoreStatus != null && shardRestoreStatus.state().completed() == false) {
assert shardRestoreStatus.state() != RestoreInProgress.State.SUCCESS : "expected shard ["
+ shardRouting
+ "] to be in initializing state but got ["
+ shardRestoreStatus.state()
+ "]";
return allocation.decision(Decision.YES, NAME, "shard is currently being restored");
}
}
}
return allocation.decision(
Decision.NO,
NAME,
"shard has failed to be restored from the snapshot [%s] because of [%s] - "
+ "manually close or delete the index [%s] in order to retry to restore the snapshot again or use the reroute API to force the "
+ "allocation of an empty primary shard",
source.snapshot(),
shardRouting.unassignedInfo().getDetails(),
shardRouting.getIndexName()
);
}
@Override
public Decision canForceAllocatePrimary(ShardRouting shardRouting, RoutingNode node, RoutingAllocation allocation) {
assert shardRouting.primary() : "must not call canForceAllocatePrimary on a non-primary shard " + shardRouting;
return canAllocate(shardRouting, node, allocation);
}
}