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Allow to disable shard allocations, closes #1358.

This commit is contained in:
Shay Banon 2011-09-23 17:35:31 +03:00
parent f74793c92a
commit d9d452a1ef
4 changed files with 186 additions and 0 deletions
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1
modules/elasticsearch/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/AllocationDeciders.java
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@ -45,6 +45,7 @@ public class AllocationDeciders extends AllocationDecider {
.add(new RebalanceOnlyWhenActiveAllocationDecider(settings))
.add(new ClusterRebalanceAllocationDecider(settings))
.add(new ConcurrentRebalanceAllocationDecider(settings))
.add(new DisableAllocationDecider(settings, nodeSettingsService))
.add(new AwarenessAllocationDecider(settings, nodeSettingsService))
.build()
);

1
modules/elasticsearch/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/AllocationDecidersModule.java
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@ -47,6 +47,7 @@ public class AllocationDecidersModule extends AbstractModule {
allocationMultibinder.addBinding().to(RebalanceOnlyWhenActiveAllocationDecider.class);
allocationMultibinder.addBinding().to(ClusterRebalanceAllocationDecider.class);
allocationMultibinder.addBinding().to(ConcurrentRebalanceAllocationDecider.class);
allocationMultibinder.addBinding().to(DisableAllocationDecider.class);
allocationMultibinder.addBinding().to(AwarenessAllocationDecider.class);
for (Class<? extends AllocationDecider> allocation : allocations) {
allocationMultibinder.addBinding().to(allocation);

77
modules/elasticsearch/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/DisableAllocationDecider.java Normal file
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@ -0,0 +1,77 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.routing.allocation.decider;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.routing.RoutingNode;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.node.settings.NodeSettingsService;
/**
*/
public class DisableAllocationDecider extends AllocationDecider {
static {
MetaData.addDynamicSettings(
"cluster.routing.allocation.disable_allocation",
"cluster.routing.allocation.disable_replica_allocation"
);
}
class ApplySettings implements NodeSettingsService.Listener {
@Override public void onRefreshSettings(Settings settings) {
boolean disableAllocation = settings.getAsBoolean("cluster.routing.allocation.disable_allocation", DisableAllocationDecider.this.disableAllocation);
if (disableAllocation != DisableAllocationDecider.this.disableAllocation) {
logger.info("updating [cluster.routing.allocation.disable_allocation] from [{}] to [{}]", DisableAllocationDecider.this.disableAllocation, disableAllocation);
DisableAllocationDecider.this.disableAllocation = disableAllocation;
}
boolean disableReplicaAllocation = settings.getAsBoolean("cluster.routing.allocation.disable_replica_allocation", DisableAllocationDecider.this.disableReplicaAllocation);
if (disableReplicaAllocation != DisableAllocationDecider.this.disableReplicaAllocation) {
logger.info("updating [cluster.routing.allocation.disable_replica_allocation] from [{}] to [{}]", DisableAllocationDecider.this.disableReplicaAllocation, disableReplicaAllocation);
DisableAllocationDecider.this.disableReplicaAllocation = disableReplicaAllocation;
}
}
}
private volatile boolean disableAllocation;
private volatile boolean disableReplicaAllocation;
@Inject public DisableAllocationDecider(Settings settings, NodeSettingsService nodeSettingsService) {
super(settings);
this.disableAllocation = settings.getAsBoolean("cluster.routing.allocation.disable_allocation", false);
this.disableReplicaAllocation = settings.getAsBoolean("cluster.routing.allocation.disable_replica_allocation", false);
nodeSettingsService.addListener(new ApplySettings());
}
@Override public Decision canAllocate(ShardRouting shardRouting, RoutingNode node, RoutingAllocation allocation) {
if (disableAllocation) {
return Decision.NO;
}
if (disableReplicaAllocation) {
return shardRouting.primary() ? Decision.YES : Decision.NO;
}
return Decision.YES;
}
}

107
modules/elasticsearch/src/test/java/org/elasticsearch/cluster/routing/allocation/DisableAllocationTests.java Normal file
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@ -0,0 +1,107 @@
/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.routing.allocation;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.testng.annotations.Test;
import static org.elasticsearch.cluster.ClusterState.*;
import static org.elasticsearch.cluster.metadata.IndexMetaData.*;
import static org.elasticsearch.cluster.metadata.MetaData.*;
import static org.elasticsearch.cluster.node.DiscoveryNodes.*;
import static org.elasticsearch.cluster.routing.RoutingBuilders.*;
import static org.elasticsearch.cluster.routing.ShardRoutingState.*;
import static org.elasticsearch.cluster.routing.allocation.RoutingAllocationTests.*;
import static org.elasticsearch.common.settings.ImmutableSettings.*;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;
/**
*/
@Test
public class DisableAllocationTests {
private final ESLogger logger = Loggers.getLogger(DisableAllocationTests.class);
@Test public void testDisableAllocation() {
AllocationService strategy = new AllocationService(settingsBuilder()
.put("cluster.routing.allocation.disable_allocation", true)
.build());
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(1).numberOfReplicas(1))
.build();
RoutingTable routingTable = routingTable()
.add(indexRoutingTable("test").initializeEmpty(metaData.index("test")))
.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
logger.info("--> adding two nodes on same rack and do rerouting");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder()
.put(newNode("node1"))
.put(newNode("node2"))
).build();
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(clusterState.routingNodes().shardsWithState(INITIALIZING).size(), equalTo(0));
}
@Test public void testDisableReplicaAllocation() {
AllocationService strategy = new AllocationService(settingsBuilder()
.put("cluster.routing.allocation.disable_replica_allocation", true)
.build());
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(1).numberOfReplicas(1))
.build();
RoutingTable routingTable = routingTable()
.add(indexRoutingTable("test").initializeEmpty(metaData.index("test")))
.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
logger.info("--> adding two nodes on same rack and do rerouting");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder()
.put(newNode("node1"))
.put(newNode("node2"))
).build();
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(clusterState.routingNodes().shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> start the shards (primaries)");
routingTable = strategy.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(clusterState.routingNodes().shardsWithState(INITIALIZING).size(), equalTo(0));
}
}