/*
* 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.RoutingNodes;
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.*;
/**
* @author kimchy (shay.banon)
*/
public class TenShardsOneReplicaRoutingTests {
private final ESLogger logger = Loggers.getLogger(TenShardsOneReplicaRoutingTests.class);
@Test public void testSingleIndexFirstStartPrimaryThenBackups() {
ShardsAllocation strategy = new ShardsAllocation(settingsBuilder()
.put("cluster.routing.allocation.node_concurrent_recoveries", 10)
.put("cluster.routing.allocation.node_initial_primaries_recoveries", 10)
.put("cluster.routing.allocation.allow_rebalance", "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build());
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(10).numberOfReplicas(1))
.build();
RoutingTable routingTable = routingTable()
.add(indexRoutingTable("test").initializeEmpty(metaData.index("test")))
.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).shards().get(1).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).shards().get(0).currentNodeId(), nullValue());
assertThat(routingTable.index("test").shard(i).shards().get(1).currentNodeId(), nullValue());
}
logger.info("Adding one node and performing rerouting");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().put(newNode("node1"))).build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).replicaShards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).currentNodeId(), nullValue());
}
logger.info("Add another node and perform rerouting, nothing will happen since primary not started");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().putAll(clusterState.nodes()).put(newNode("node2"))).build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable == routingTable, equalTo(true));
logger.info("Start the primary shard (on node1)");
RoutingNodes routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node1").shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).replicaShards().size(), equalTo(1));
// backup shards are initializing as well, we make sure that they recover from primary *started* shards in the IndicesClusterStateService
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).currentNodeId(), equalTo("node2"));
}
logger.info("Reroute, nothing should change");
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
assertThat(prevRoutingTable == routingTable, equalTo(true));
logger.info("Start the backup shard");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node2").shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
for (int i = 0; i < routingTable.index("test").shards().size(); i++) {
assertThat(routingTable.index("test").shard(i).size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).shards().size(), equalTo(2));
assertThat(routingTable.index("test").shard(i).primaryShard().state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).primaryShard().currentNodeId(), equalTo("node1"));
assertThat(routingTable.index("test").shard(i).replicaShards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(i).replicaShards().get(0).currentNodeId(), equalTo("node2"));
}
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), equalTo(10));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), equalTo(10));
logger.info("Add another node and perform rerouting");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().putAll(clusterState.nodes()).put(newNode("node3"))).build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED, RELOCATING), equalTo(10));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), lessThan(10));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED, RELOCATING), equalTo(10));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), lessThan(10));
assertThat(routingNodes.node("node3").numberOfShardsWithState(INITIALIZING), equalTo(6));
logger.info("Start the shards on node 3");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node3").shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
routingNodes = clusterState.routingNodes();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(10));
assertThat(routingNodes.node("node1").numberOfShardsWithState(STARTED), equalTo(8));
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), equalTo(6));
assertThat(routingNodes.node("node3").numberOfShardsWithState(STARTED), equalTo(6));
}
}