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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.snapshots;
import org.elasticsearch.cluster.metadata.RepositoriesMetadata;
import org.elasticsearch.cluster.metadata.RepositoryMetadata;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.health.HealthIndicatorDetails;
import org.elasticsearch.health.HealthIndicatorImpact;
import org.elasticsearch.health.HealthIndicatorResult;
import org.elasticsearch.health.HealthIndicatorService;
import org.elasticsearch.health.ImpactArea;
import org.elasticsearch.health.SimpleHealthIndicatorDetails;
import org.elasticsearch.repositories.RepositoryData;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import static org.elasticsearch.common.Strings.collectionToDelimitedStringWithLimit;
import static org.elasticsearch.common.util.CollectionUtils.limitSize;
import static org.elasticsearch.health.HealthStatus.GREEN;
import static org.elasticsearch.health.HealthStatus.RED;
import static org.elasticsearch.health.ServerHealthComponents.SNAPSHOT;
/**
* This indicator reports health for snapshot repositories.
*
* Indicator will report RED status when any of snapshot repositories is marked as corrupted.
* Data might not be backed up in such cases.
*
* Corrupted repository most likely need to be manually cleaned and a new snapshot needs to be created from scratch.
*/
public class RepositoryIntegrityHealthIndicatorService implements HealthIndicatorService {
public static final String NAME = "repository_integrity";
public static final String HELP_URL = "https://ela.st/fix-repository-integrity";
public static final String NO_REPOS_CONFIGURED = "No snapshot repositories configured.";
public static final String NO_CORRUPT_REPOS = "No corrupted snapshot repositories.";
private final ClusterService clusterService;
public RepositoryIntegrityHealthIndicatorService(ClusterService clusterService) {
this.clusterService = clusterService;
}
@Override
public String name() {
return NAME;
}
@Override
public String component() {
return SNAPSHOT;
}
@Override
public String helpURL() {
return HELP_URL;
}
@Override
public HealthIndicatorResult calculate(boolean explain) {
var snapshotMetadata = clusterService.state().metadata().custom(RepositoriesMetadata.TYPE, RepositoriesMetadata.EMPTY);
if (snapshotMetadata.repositories().isEmpty()) {
return createIndicator(
GREEN,
NO_REPOS_CONFIGURED,
HealthIndicatorDetails.EMPTY,
Collections.emptyList(),
Collections.emptyList()
);
}
var corrupted = snapshotMetadata.repositories()
.stream()
.filter(repository -> repository.generation() == RepositoryData.CORRUPTED_REPO_GEN)
.map(RepositoryMetadata::name)
.toList();
var totalRepositories = snapshotMetadata.repositories().size();
var corruptedRepositories = corrupted.size();
if (corrupted.isEmpty()) {
return createIndicator(
GREEN,
"No corrupted snapshot repositories.",
explain ? new SimpleHealthIndicatorDetails(Map.of("total_repositories", totalRepositories)) : HealthIndicatorDetails.EMPTY,
Collections.emptyList(),
Collections.emptyList()
);
}
List impacts = Collections.singletonList(
new HealthIndicatorImpact(
1,
String.format(
Locale.ROOT,
"Data in corrupted snapshot repositor%s %s may be lost and cannot be restored.",
corrupted.size() > 1 ? "ies" : "y",
limitSize(corrupted, 10)
),
List.of(ImpactArea.BACKUP)
)
);
return createIndicator(
RED,
createCorruptedRepositorySummary(corrupted),
explain
? new SimpleHealthIndicatorDetails(
Map.of(
"total_repositories",
totalRepositories,
"corrupted_repositories",
corruptedRepositories,
"corrupted",
limitSize(corrupted, 10)
)
)
: HealthIndicatorDetails.EMPTY,
impacts,
Collections.emptyList()
);
}
private static String createCorruptedRepositorySummary(List corrupted) {
var message = new StringBuilder().append("Detected [").append(corrupted.size()).append("] corrupted snapshot repositories: ");
collectionToDelimitedStringWithLimit(corrupted, ",", "[", "].", 1024, message);
return message.toString();
}
}