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/*
* 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.
*/
package org.elasticsearch.action.admin.cluster.configuration;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.ElasticsearchTimeoutException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ClusterStateObserver;
import org.elasticsearch.cluster.ClusterStateObserver.Listener;
import org.elasticsearch.cluster.ClusterStateUpdateTask;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.coordination.CoordinationMetaData;
import org.elasticsearch.cluster.coordination.CoordinationMetaData.VotingConfigExclusion;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.settings.Setting;
import org.elasticsearch.common.settings.Setting.Property;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.threadpool.ThreadPool.Names;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
import java.util.Set;
import java.util.function.Predicate;
import java.util.stream.Collectors;
public class TransportAddVotingConfigExclusionsAction extends TransportMasterNodeAction {
private static final Logger logger = LogManager.getLogger(TransportAddVotingConfigExclusionsAction.class);
public static final Setting MAXIMUM_VOTING_CONFIG_EXCLUSIONS_SETTING
= Setting.intSetting("cluster.max_voting_config_exclusions", 10, 1, Property.Dynamic, Property.NodeScope);
@Inject
public TransportAddVotingConfigExclusionsAction(TransportService transportService, ClusterService clusterService, ThreadPool threadPool,
ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
super(AddVotingConfigExclusionsAction.NAME, transportService, clusterService, threadPool, actionFilters,
AddVotingConfigExclusionsRequest::new, indexNameExpressionResolver);
}
@Override
protected String executor() {
return Names.SAME;
}
@Override
protected AddVotingConfigExclusionsResponse read(StreamInput in) throws IOException {
return new AddVotingConfigExclusionsResponse(in);
}
@Override
protected void masterOperation(AddVotingConfigExclusionsRequest request, ClusterState state,
ActionListener listener) throws Exception {
resolveVotingConfigExclusionsAndCheckMaximum(request, state); // throws IAE if no nodes matched or maximum exceeded
clusterService.submitStateUpdateTask("add-voting-config-exclusions", new ClusterStateUpdateTask(Priority.URGENT) {
private Set resolvedExclusions;
@Override
public ClusterState execute(ClusterState currentState) {
assert resolvedExclusions == null : resolvedExclusions;
resolvedExclusions = resolveVotingConfigExclusionsAndCheckMaximum(request, currentState);
final CoordinationMetaData.Builder builder = CoordinationMetaData.builder(currentState.coordinationMetaData());
resolvedExclusions.forEach(builder::addVotingConfigExclusion);
final MetaData newMetaData = MetaData.builder(currentState.metaData()).coordinationMetaData(builder.build()).build();
final ClusterState newState = ClusterState.builder(currentState).metaData(newMetaData).build();
assert newState.getVotingConfigExclusions().size() <= MAXIMUM_VOTING_CONFIG_EXCLUSIONS_SETTING.get(
currentState.metaData().settings());
return newState;
}
@Override
public void onFailure(String source, Exception e) {
listener.onFailure(e);
}
@Override
public void clusterStateProcessed(String source, ClusterState oldState, ClusterState newState) {
final ClusterStateObserver observer
= new ClusterStateObserver(clusterService, request.getTimeout(), logger, threadPool.getThreadContext());
final Set excludedNodeIds = resolvedExclusions.stream().map(VotingConfigExclusion::getNodeId)
.collect(Collectors.toSet());
final Predicate allNodesRemoved = clusterState -> {
final Set votingConfigNodeIds = clusterState.getLastCommittedConfiguration().getNodeIds();
return excludedNodeIds.stream().noneMatch(votingConfigNodeIds::contains);
};
final Listener clusterStateListener = new Listener() {
@Override
public void onNewClusterState(ClusterState state) {
listener.onResponse(new AddVotingConfigExclusionsResponse());
}
@Override
public void onClusterServiceClose() {
listener.onFailure(new ElasticsearchException("cluster service closed while waiting for voting config exclusions " +
resolvedExclusions + " to take effect"));
}
@Override
public void onTimeout(TimeValue timeout) {
listener.onFailure(new ElasticsearchTimeoutException("timed out waiting for voting config exclusions "
+ resolvedExclusions + " to take effect"));
}
};
if (allNodesRemoved.test(newState)) {
clusterStateListener.onNewClusterState(newState);
} else {
observer.waitForNextChange(clusterStateListener, allNodesRemoved);
}
}
});
}
private static Set resolveVotingConfigExclusionsAndCheckMaximum(AddVotingConfigExclusionsRequest request,
ClusterState state) {
return request.resolveVotingConfigExclusionsAndCheckMaximum(state,
MAXIMUM_VOTING_CONFIG_EXCLUSIONS_SETTING.get(state.metaData().settings()), MAXIMUM_VOTING_CONFIG_EXCLUSIONS_SETTING.getKey());
}
@Override
protected ClusterBlockException checkBlock(AddVotingConfigExclusionsRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_WRITE);
}
}