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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.reroute;
import org.elasticsearch.Version;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.EmptyClusterInfoService;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.FailedRerouteAllocation;
import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
import org.elasticsearch.cluster.routing.allocation.allocator.BalancedShardsAllocator;
import org.elasticsearch.cluster.routing.allocation.command.AllocateEmptyPrimaryAllocationCommand;
import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
import org.elasticsearch.cluster.routing.allocation.decider.MaxRetryAllocationDecider;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.io.stream.NamedWriteableAwareStreamInput;
import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.network.NetworkModule;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.cluster.ESAllocationTestCase;
import org.elasticsearch.test.gateway.NoopGatewayAllocator;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicReference;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.UNASSIGNED;
public class ClusterRerouteTests extends ESAllocationTestCase {
public void testSerializeRequest() throws IOException {
ClusterRerouteRequest req = new ClusterRerouteRequest();
req.setRetryFailed(randomBoolean());
req.dryRun(randomBoolean());
req.explain(randomBoolean());
req.add(new AllocateEmptyPrimaryAllocationCommand("foo", 1, "bar", randomBoolean()));
req.timeout(TimeValue.timeValueMillis(randomIntBetween(0, 100)));
BytesStreamOutput out = new BytesStreamOutput();
req.writeTo(out);
BytesReference bytes = out.bytes();
NetworkModule networkModule = new NetworkModule(null, Settings.EMPTY, true);
NamedWriteableRegistry namedWriteableRegistry = new NamedWriteableRegistry(networkModule.getNamedWriteables());
StreamInput wrap = new NamedWriteableAwareStreamInput(bytes.streamInput(),
namedWriteableRegistry);
ClusterRerouteRequest deserializedReq = new ClusterRerouteRequest();
deserializedReq.readFrom(wrap);
assertEquals(req.isRetryFailed(), deserializedReq.isRetryFailed());
assertEquals(req.dryRun(), deserializedReq.dryRun());
assertEquals(req.explain(), deserializedReq.explain());
assertEquals(req.timeout(), deserializedReq.timeout());
assertEquals(1, deserializedReq.getCommands().commands().size()); // allocation commands have their own tests
assertEquals(req.getCommands().commands().size(), deserializedReq.getCommands().commands().size());
}
public void testClusterStateUpdateTask() {
AllocationService allocationService = new AllocationService(Settings.builder().build(), new AllocationDeciders(Settings.EMPTY,
Collections.singleton(new MaxRetryAllocationDecider(Settings.EMPTY))),
NoopGatewayAllocator.INSTANCE, new BalancedShardsAllocator(Settings.EMPTY), EmptyClusterInfoService.INSTANCE);
ClusterState clusterState = createInitialClusterState(allocationService);
ClusterRerouteRequest req = new ClusterRerouteRequest();
req.dryRun(true);
AtomicReference<ClusterRerouteResponse> responseRef = new AtomicReference<>();
ActionListener<ClusterRerouteResponse> responseActionListener = new ActionListener<ClusterRerouteResponse>() {
@Override
public void onResponse(ClusterRerouteResponse clusterRerouteResponse) {
responseRef.set(clusterRerouteResponse);
}
@Override
public void onFailure(Exception e) {
}
};
TransportClusterRerouteAction.ClusterRerouteResponseAckedClusterStateUpdateTask task =
new TransportClusterRerouteAction.ClusterRerouteResponseAckedClusterStateUpdateTask(logger, allocationService, req,
responseActionListener );
ClusterState execute = task.execute(clusterState);
assertSame(execute, clusterState); // dry-run
task.onAllNodesAcked(null);
assertNotSame(responseRef.get().getState(), execute);
req.dryRun(false);// now we allocate
final int retries = MaxRetryAllocationDecider.SETTING_ALLOCATION_MAX_RETRY.get(Settings.EMPTY);
// now fail it N-1 times
for (int i = 0; i < retries; i++) {
ClusterState newState = task.execute(clusterState);
assertNotSame(newState, clusterState); // dry-run=false
clusterState = newState;
RoutingTable routingTable = clusterState.routingTable();
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), INITIALIZING);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), i);
List<FailedRerouteAllocation.FailedShard> failedShards = Collections.singletonList(
new FailedRerouteAllocation.FailedShard(routingTable.index("idx").shard(0).shards().get(0), "boom" + i,
new UnsupportedOperationException()));
RoutingAllocation.Result result = allocationService.applyFailedShards(clusterState, failedShards);
assertTrue(result.changed());
clusterState = ClusterState.builder(clusterState).routingTable(result.routingTable()).build();
routingTable = clusterState.routingTable();
assertEquals(routingTable.index("idx").shards().size(), 1);
if (i == retries-1) {
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), UNASSIGNED);
} else {
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), INITIALIZING);
}
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), i+1);
}
// without retry_failed we won't allocate that shard
ClusterState newState = task.execute(clusterState);
assertNotSame(newState, clusterState); // dry-run=false
task.onAllNodesAcked(null);
assertSame(responseRef.get().getState(), newState);
RoutingTable routingTable = clusterState.routingTable();
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), UNASSIGNED);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), retries);
req.setRetryFailed(true); // now we manually retry and get the shard back into initializing
newState = task.execute(clusterState);
assertNotSame(newState, clusterState); // dry-run=false
clusterState = newState;
routingTable = clusterState.routingTable();
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), INITIALIZING);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).unassignedInfo().getNumFailedAllocations(), retries);
}
private ClusterState createInitialClusterState(AllocationService service) {
MetaData.Builder metaBuilder = MetaData.builder();
metaBuilder.put(IndexMetaData.builder("idx").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(0));
MetaData metaData = metaBuilder.build();
RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
routingTableBuilder.addAsNew(metaData.index("idx"));
RoutingTable routingTable = routingTableBuilder.build();
ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING
.getDefault(Settings.EMPTY))
.metaData(metaData).routingTable(routingTable).build();
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1")).add(newNode("node2")))
.build();
RoutingTable prevRoutingTable = routingTable;
routingTable = service.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertEquals(prevRoutingTable.index("idx").shards().size(), 1);
assertEquals(prevRoutingTable.index("idx").shard(0).shards().get(0).state(), UNASSIGNED);
assertEquals(routingTable.index("idx").shards().size(), 1);
assertEquals(routingTable.index("idx").shard(0).shards().get(0).state(), INITIALIZING);
return clusterState;
}
}
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