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Elasticsearch Expanded Pack Plugin - Core
/*
* 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; you may not use this file except in compliance with the Elastic License
* 2.0.
*/
package org.elasticsearch.xpack.core.ilm;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.client.Client;
import org.elasticsearch.cluster.metadata.IndexMetadata;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.xcontent.ObjectParser;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.xpack.core.ilm.Step.StepKey;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
/**
* A {@link LifecycleAction} which freezes the index.
*/
public class FreezeAction implements LifecycleAction {
private static final Logger logger = LogManager.getLogger(FreezeAction.class);
public static final String NAME = "freeze";
public static final String CONDITIONAL_SKIP_FREEZE_STEP = BranchingStep.NAME + "-freeze-check-prerequisites";
private static final ObjectParser PARSER = new ObjectParser<>(NAME, FreezeAction::new);
public static FreezeAction parse(XContentParser parser) {
return PARSER.apply(parser, null);
}
public FreezeAction() {
}
public FreezeAction(StreamInput in) {
}
@Override
public void writeTo(StreamOutput out) throws IOException {
}
@Override
public String getWriteableName() {
return NAME;
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
builder.startObject();
builder.endObject();
return builder;
}
@Override
public boolean isSafeAction() {
return true;
}
@Override
public List toSteps(Client client, String phase, StepKey nextStepKey) {
StepKey preFreezeMergeBranchingKey = new StepKey(phase, NAME, CONDITIONAL_SKIP_FREEZE_STEP);
StepKey checkNotWriteIndex = new StepKey(phase, NAME, CheckNotDataStreamWriteIndexStep.NAME);
StepKey freezeStepKey = new StepKey(phase, NAME, FreezeStep.NAME);
BranchingStep conditionalSkipFreezeStep = new BranchingStep(preFreezeMergeBranchingKey, checkNotWriteIndex, nextStepKey,
(index, clusterState) -> {
IndexMetadata indexMetadata = clusterState.getMetadata().index(index);
assert indexMetadata != null : "index " + index.getName() + " must exist in the cluster state";
String policyName = LifecycleSettings.LIFECYCLE_NAME_SETTING.get(indexMetadata.getSettings());
if (indexMetadata.getSettings().get(LifecycleSettings.SNAPSHOT_INDEX_NAME) != null) {
logger.warn("[{}] action is configured for index [{}] in policy [{}] which is mounted as searchable snapshot. " +
"Skipping this action", FreezeAction.NAME, index.getName(), policyName);
return true;
}
if (indexMetadata.getSettings().getAsBoolean("index.frozen", false)) {
logger.debug("skipping [{}] action for index [{}] in policy [{}] as the index is already frozen", FreezeAction.NAME,
index.getName(), policyName);
return true;
}
return false;
});
CheckNotDataStreamWriteIndexStep checkNoWriteIndexStep = new CheckNotDataStreamWriteIndexStep(checkNotWriteIndex,
freezeStepKey);
FreezeStep freezeStep = new FreezeStep(freezeStepKey, nextStepKey, client);
return Arrays.asList(conditionalSkipFreezeStep, checkNoWriteIndexStep, freezeStep);
}
@Override
public int hashCode() {
return 1;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (obj.getClass() != getClass()) {
return false;
}
return true;
}
@Override
public String toString() {
return Strings.toString(this);
}
}