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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.cluster.metadata;
import com.google.common.collect.Sets;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.settings.put.UpdateSettingsClusterStateUpdateRequest;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.cluster.*;
import org.elasticsearch.cluster.ack.ClusterStateUpdateResponse;
import org.elasticsearch.cluster.block.ClusterBlocks;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.cluster.settings.DynamicSettings;
import org.elasticsearch.common.Booleans;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.component.AbstractComponent;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.index.settings.IndexDynamicSettings;
import java.util.*;
/**
* Service responsible for submitting update index settings requests
*/
public class MetaDataUpdateSettingsService extends AbstractComponent implements ClusterStateListener {
// the value we recognize in the "max" position to mean all the nodes
private static final String ALL_NODES_VALUE = "all";
private final ClusterService clusterService;
private final AllocationService allocationService;
private final DynamicSettings dynamicSettings;
@Inject
public MetaDataUpdateSettingsService(Settings settings, ClusterService clusterService, AllocationService allocationService, @IndexDynamicSettings DynamicSettings dynamicSettings) {
super(settings);
this.clusterService = clusterService;
this.clusterService.add(this);
this.allocationService = allocationService;
this.dynamicSettings = dynamicSettings;
}
@Override
public void clusterChanged(ClusterChangedEvent event) {
// update an index with number of replicas based on data nodes if possible
if (!event.state().nodes().localNodeMaster()) {
return;
}
// we will want to know this for translating "all" to a number
final int dataNodeCount = event.state().nodes().dataNodes().size();
Map<Integer, List<String>> nrReplicasChanged = new HashMap<>();
// we need to do this each time in case it was changed by update settings
for (final IndexMetaData indexMetaData : event.state().metaData()) {
String autoExpandReplicas = indexMetaData.settings().get(IndexMetaData.SETTING_AUTO_EXPAND_REPLICAS);
if (autoExpandReplicas != null && Booleans.parseBoolean(autoExpandReplicas, true)) { // Booleans only work for false values, just as we want it here
try {
final int min;
final int max;
final int dash = autoExpandReplicas.indexOf('-');
if (-1 == dash) {
logger.warn("Unexpected value [{}] for setting [{}]; it should be dash delimited",
autoExpandReplicas, IndexMetaData.SETTING_AUTO_EXPAND_REPLICAS);
continue;
}
final String sMin = autoExpandReplicas.substring(0, dash);
try {
min = Integer.parseInt(sMin);
} catch (NumberFormatException e) {
logger.warn("failed to set [{}], minimum value is not a number [{}]",
e, IndexMetaData.SETTING_AUTO_EXPAND_REPLICAS, sMin);
continue;
}
String sMax = autoExpandReplicas.substring(dash + 1);
if (sMax.equals(ALL_NODES_VALUE)) {
max = dataNodeCount - 1;
} else {
try {
max = Integer.parseInt(sMax);
} catch (NumberFormatException e) {
logger.warn("failed to set [{}], maximum value is neither [{}] nor a number [{}]",
e, IndexMetaData.SETTING_AUTO_EXPAND_REPLICAS, ALL_NODES_VALUE, sMax);
continue;
}
}
int numberOfReplicas = dataNodeCount - 1;
if (numberOfReplicas < min) {
numberOfReplicas = min;
} else if (numberOfReplicas > max) {
numberOfReplicas = max;
}
// same value, nothing to do there
if (numberOfReplicas == indexMetaData.numberOfReplicas()) {
continue;
}
if (numberOfReplicas >= min && numberOfReplicas <= max) {
if (!nrReplicasChanged.containsKey(numberOfReplicas)) {
nrReplicasChanged.put(numberOfReplicas, new ArrayList<String>());
}
nrReplicasChanged.get(numberOfReplicas).add(indexMetaData.index());
}
} catch (Exception e) {
logger.warn("[{}] failed to parse auto expand replicas", e, indexMetaData.index());
}
}
}
if (nrReplicasChanged.size() > 0) {
for (final Integer fNumberOfReplicas : nrReplicasChanged.keySet()) {
Settings settings = ImmutableSettings.settingsBuilder().put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, fNumberOfReplicas).build();
final List<String> indices = nrReplicasChanged.get(fNumberOfReplicas);
UpdateSettingsClusterStateUpdateRequest updateRequest = new UpdateSettingsClusterStateUpdateRequest()
.indices(indices.toArray(new String[indices.size()])).settings(settings)
.ackTimeout(TimeValue.timeValueMillis(0)) //no need to wait for ack here
.masterNodeTimeout(TimeValue.timeValueMinutes(10));
updateSettings(updateRequest, new ActionListener<ClusterStateUpdateResponse>() {
@Override
public void onResponse(ClusterStateUpdateResponse response) {
for (String index : indices) {
logger.info("[{}] auto expanded replicas to [{}]", index, fNumberOfReplicas);
}
}
@Override
public void onFailure(Throwable t) {
for (String index : indices) {
logger.warn("[{}] fail to auto expand replicas to [{}]", index, fNumberOfReplicas);
}
}
});
}
}
}
public void updateSettings(final UpdateSettingsClusterStateUpdateRequest request, final ActionListener<ClusterStateUpdateResponse> listener) {
ImmutableSettings.Builder updatedSettingsBuilder = ImmutableSettings.settingsBuilder();
for (Map.Entry<String, String> entry : request.settings().getAsMap().entrySet()) {
if (entry.getKey().equals("index")) {
continue;
}
if (!entry.getKey().startsWith("index.")) {
updatedSettingsBuilder.put("index." + entry.getKey(), entry.getValue());
} else {
updatedSettingsBuilder.put(entry.getKey(), entry.getValue());
}
}
// never allow to change the number of shards
for (String key : updatedSettingsBuilder.internalMap().keySet()) {
if (key.equals(IndexMetaData.SETTING_NUMBER_OF_SHARDS)) {
listener.onFailure(new ElasticsearchIllegalArgumentException("can't change the number of shards for an index"));
return;
}
}
final Settings closeSettings = updatedSettingsBuilder.build();
final Set<String> removedSettings = Sets.newHashSet();
final Set<String> errors = Sets.newHashSet();
for (Map.Entry<String, String> setting : updatedSettingsBuilder.internalMap().entrySet()) {
if (!dynamicSettings.hasDynamicSetting(setting.getKey())) {
removedSettings.add(setting.getKey());
} else {
String error = dynamicSettings.validateDynamicSetting(setting.getKey(), setting.getValue());
if (error != null) {
errors.add("[" + setting.getKey() + "] - " + error);
}
}
}
if (!errors.isEmpty()) {
listener.onFailure(new ElasticsearchIllegalArgumentException("can't process the settings: " + errors.toString()));
return;
}
if (!removedSettings.isEmpty()) {
for (String removedSetting : removedSettings) {
updatedSettingsBuilder.remove(removedSetting);
}
}
final Settings openSettings = updatedSettingsBuilder.build();
clusterService.submitStateUpdateTask("update-settings", Priority.URGENT, new AckedClusterStateUpdateTask<ClusterStateUpdateResponse>(request, listener) {
@Override
protected ClusterStateUpdateResponse newResponse(boolean acknowledged) {
return new ClusterStateUpdateResponse(acknowledged);
}
@Override
public ClusterState execute(ClusterState currentState) {
String[] actualIndices = currentState.metaData().concreteIndices(IndicesOptions.strictExpand(), request.indices());
RoutingTable.Builder routingTableBuilder = RoutingTable.builder(currentState.routingTable());
MetaData.Builder metaDataBuilder = MetaData.builder(currentState.metaData());
// allow to change any settings to a close index, and only allow dynamic settings to be changed
// on an open index
Set<String> openIndices = Sets.newHashSet();
Set<String> closeIndices = Sets.newHashSet();
for (String index : actualIndices) {
if (currentState.metaData().index(index).state() == IndexMetaData.State.OPEN) {
openIndices.add(index);
} else {
closeIndices.add(index);
}
}
if (!removedSettings.isEmpty() && !openIndices.isEmpty()) {
throw new ElasticsearchIllegalArgumentException(String.format(Locale.ROOT,
"Can't update non dynamic settings[%s] for open indices[%s]",
removedSettings,
openIndices
));
}
int updatedNumberOfReplicas = openSettings.getAsInt(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, -1);
if (updatedNumberOfReplicas != -1) {
routingTableBuilder.updateNumberOfReplicas(updatedNumberOfReplicas, actualIndices);
metaDataBuilder.updateNumberOfReplicas(updatedNumberOfReplicas, actualIndices);
logger.info("updating number_of_replicas to [{}] for indices {}", updatedNumberOfReplicas, actualIndices);
}
ClusterBlocks.Builder blocks = ClusterBlocks.builder().blocks(currentState.blocks());
Boolean updatedReadOnly = openSettings.getAsBoolean(IndexMetaData.SETTING_READ_ONLY, null);
if (updatedReadOnly != null) {
for (String index : actualIndices) {
if (updatedReadOnly) {
blocks.addIndexBlock(index, IndexMetaData.INDEX_READ_ONLY_BLOCK);
} else {
blocks.removeIndexBlock(index, IndexMetaData.INDEX_READ_ONLY_BLOCK);
}
}
}
Boolean updateMetaDataBlock = openSettings.getAsBoolean(IndexMetaData.SETTING_BLOCKS_METADATA, null);
if (updateMetaDataBlock != null) {
for (String index : actualIndices) {
if (updateMetaDataBlock) {
blocks.addIndexBlock(index, IndexMetaData.INDEX_METADATA_BLOCK);
} else {
blocks.removeIndexBlock(index, IndexMetaData.INDEX_METADATA_BLOCK);
}
}
}
Boolean updateWriteBlock = openSettings.getAsBoolean(IndexMetaData.SETTING_BLOCKS_WRITE, null);
if (updateWriteBlock != null) {
for (String index : actualIndices) {
if (updateWriteBlock) {
blocks.addIndexBlock(index, IndexMetaData.INDEX_WRITE_BLOCK);
} else {
blocks.removeIndexBlock(index, IndexMetaData.INDEX_WRITE_BLOCK);
}
}
}
Boolean updateReadBlock = openSettings.getAsBoolean(IndexMetaData.SETTING_BLOCKS_READ, null);
if (updateReadBlock != null) {
for (String index : actualIndices) {
if (updateReadBlock) {
blocks.addIndexBlock(index, IndexMetaData.INDEX_READ_BLOCK);
} else {
blocks.removeIndexBlock(index, IndexMetaData.INDEX_READ_BLOCK);
}
}
}
if (!openIndices.isEmpty()) {
String[] indices = openIndices.toArray(new String[openIndices.size()]);
metaDataBuilder.updateSettings(openSettings, indices);
}
if (!closeIndices.isEmpty()) {
String[] indices = closeIndices.toArray(new String[closeIndices.size()]);
metaDataBuilder.updateSettings(closeSettings, indices);
}
ClusterState updatedState = ClusterState.builder(currentState).metaData(metaDataBuilder).routingTable(routingTableBuilder).blocks(blocks).build();
// now, reroute in case things change that require it (like number of replicas)
RoutingAllocation.Result routingResult = allocationService.reroute(updatedState);
updatedState = ClusterState.builder(updatedState).routingResult(routingResult).build();
return updatedState;
}
});
}
}