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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.routing.allocation;
import org.elasticsearch.Version;
import org.elasticsearch.cluster.ClusterName;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.ShardRoutingState;
import org.elasticsearch.cluster.routing.allocation.decider.SameShardAllocationDecider;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.LocalTransportAddress;
import org.elasticsearch.cluster.ESAllocationTestCase;
import static java.util.Collections.emptyMap;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.allocation.RoutingNodesUtils.numberOfShardsOfType;
import static org.hamcrest.Matchers.equalTo;
/**
*/
public class SameShardRoutingTests extends ESAllocationTestCase {
private final ESLogger logger = Loggers.getLogger(SameShardRoutingTests.class);
public void testSameHost() {
AllocationService strategy = createAllocationService(Settings.builder()
.put(SameShardAllocationDecider.SAME_HOST_SETTING, true).build());
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(1))
.build();
RoutingTable routingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData)
.routingTable(routingTable).build();
logger.info("--> adding two nodes with the same host");
clusterState = ClusterState.builder(clusterState).nodes(
DiscoveryNodes.builder()
.add(new DiscoveryNode("node1", "node1", "node1", "test1", "test1", LocalTransportAddress.buildUnique(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT))
.add(new DiscoveryNode("node2", "node2", "node2", "test1", "test1", LocalTransportAddress.buildUnique(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT))).build();
routingTable = strategy.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertThat(numberOfShardsOfType(clusterState.getRoutingNodes(), ShardRoutingState.INITIALIZING), equalTo(2));
logger.info("--> start all primary shards, no replica will be started since its on the same host");
routingTable = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING))
.routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertThat(numberOfShardsOfType(clusterState.getRoutingNodes(), ShardRoutingState.STARTED), equalTo(2));
assertThat(numberOfShardsOfType(clusterState.getRoutingNodes(), ShardRoutingState.INITIALIZING), equalTo(0));
logger.info("--> add another node, with a different host, replicas will be allocating");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes())
.add(new DiscoveryNode("node3", "node3", "node3", "test2", "test2", LocalTransportAddress.buildUnique(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT))).build();
routingTable = strategy.reroute(clusterState, "reroute").routingTable();
clusterState = ClusterState.builder(clusterState).routingTable(routingTable).build();
assertThat(numberOfShardsOfType(clusterState.getRoutingNodes(), ShardRoutingState.STARTED), equalTo(2));
assertThat(numberOfShardsOfType(clusterState.getRoutingNodes(), ShardRoutingState.INITIALIZING), equalTo(2));
for (ShardRouting shardRouting : clusterState.getRoutingNodes().shardsWithState(INITIALIZING)) {
assertThat(shardRouting.currentNodeId(), equalTo("node3"));
}
}
}
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