/*
* Licensed to Elastic Search and Shay Banon under one
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* 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.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.cluster.routing.MutableShardRouting;
import org.elasticsearch.cluster.routing.RoutingNode;
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 java.util.List;
import java.util.Set;
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.collect.Lists.*;
import static org.elasticsearch.common.collect.Sets.*;
import static org.elasticsearch.common.settings.ImmutableSettings.*;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;
/**
* @author kimchy (shay.banon)
*/
public class SingleShardNoReplicasRoutingTests {
private final ESLogger logger = Loggers.getLogger(SingleShardNoReplicasRoutingTests.class);
@Test public void testSingleIndexStartedShard() {
ShardsAllocation strategy = new ShardsAllocation(settingsBuilder().put("cluster.routing.allocation.concurrent_recoveries", 10).build());
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(1).numberOfReplicas(0))
.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(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(0).shards().get(0).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(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), equalTo("node1"));
logger.info("Rerouting again, nothing should change");
prevRoutingTable = routingTable;
clusterState = newClusterStateBuilder().state(clusterState).build();
routingTable = strategy.reroute(clusterState).routingTable();
assertThat(routingTable == prevRoutingTable, equalTo(true));
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
logger.info("Marking the shard as started");
RoutingNodes routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node1").shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(routingTable != prevRoutingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), equalTo("node1"));
logger.info("Starting another node and making sure nothing changed");
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(routingTable == prevRoutingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), equalTo("node1"));
logger.info("Killing node1 where the shard is, checking the shard is relocated");
clusterState = newClusterStateBuilder().state(clusterState).nodes(newNodesBuilder().putAll(clusterState.nodes()).remove("node1")).build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(routingTable != prevRoutingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), equalTo("node2"));
logger.info("Start another node, make sure that things remain the same (shard is in node2 and initializing)");
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();
assertThat(routingTable == prevRoutingTable, equalTo(true));
logger.info("Start the shard on node 2");
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.node("node2").shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(routingTable != prevRoutingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(STARTED));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), equalTo("node2"));
}
@Test public void testSingleIndexShardFailed() {
ShardsAllocation strategy = new ShardsAllocation(settingsBuilder().put("cluster.routing.allocation.concurrent_recoveries", 10).build());
logger.info("Building initial routing table");
MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(1).numberOfReplicas(0))
.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(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), nullValue());
logger.info("Adding one node and 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(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).unassigned(), equalTo(false));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), equalTo("node1"));
logger.info("Marking the shard as failed");
RoutingNodes routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyFailedShard(clusterState, routingNodes.node("node1").shardsWithState(INITIALIZING).get(0)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test").shard(0).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test").shard(0).shards().get(0).currentNodeId(), nullValue());
}
@Test public void testMultiIndexEvenDistribution() {
ShardsAllocation strategy = new ShardsAllocation(settingsBuilder()
.put("cluster.routing.allocation.concurrent_recoveries", 10)
.put("cluster.routing.allocation.allow_rebalance", "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build());
final int numberOfIndices = 50;
logger.info("Building initial routing table with " + numberOfIndices + " indices");
MetaData.Builder metaDataBuilder = newMetaDataBuilder();
for (int i = 0; i < numberOfIndices; i++) {
metaDataBuilder.put(newIndexMetaDataBuilder("test" + i).numberOfShards(1).numberOfReplicas(0));
}
MetaData metaData = metaDataBuilder.build();
RoutingTable.Builder routingTableBuilder = routingTable();
for (int i = 0; i < numberOfIndices; i++) {
routingTableBuilder.add(indexRoutingTable("test" + i).initializeEmpty(metaData.index("test" + i)));
}
RoutingTable routingTable = routingTableBuilder.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
assertThat(routingTable.indicesRouting().size(), equalTo(numberOfIndices));
for (int i = 0; i < numberOfIndices; i++) {
assertThat(routingTable.index("test" + i).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).state(), equalTo(UNASSIGNED));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).currentNodeId(), nullValue());
}
logger.info("Adding " + (numberOfIndices / 2) + " nodes");
DiscoveryNodes.Builder nodesBuilder = newNodesBuilder();
List<DiscoveryNode> nodes = newArrayList();
for (int i = 0; i < (numberOfIndices / 2); i++) {
nodesBuilder.put(newNode("node" + i));
}
RoutingTable prevRoutingTable = routingTable;
clusterState = newClusterStateBuilder().state(clusterState).nodes(nodesBuilder).build();
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
for (int i = 0; i < numberOfIndices; i++) {
assertThat(routingTable.index("test" + i).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).unassigned(), equalTo(false));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).state(), equalTo(INITIALIZING));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).primary(), equalTo(true));
// make sure we still have 2 shards initializing per node on the first 25 nodes
String nodeId = routingTable.index("test" + i).shard(0).shards().get(0).currentNodeId();
int nodeIndex = Integer.parseInt(nodeId.substring("node".length()));
assertThat(nodeIndex, lessThan(25));
}
RoutingNodes routingNodes = clusterState.routingNodes();
Set<String> encounteredIndices = newHashSet();
for (RoutingNode routingNode : routingNodes) {
assertThat(routingNode.numberOfShardsWithState(STARTED), equalTo(0));
assertThat(routingNode.shards().size(), equalTo(2));
// make sure we still have 2 shards initializing per node on the only 25 nodes
int nodeIndex = Integer.parseInt(routingNode.nodeId().substring("node".length()));
assertThat(nodeIndex, lessThan(25));
// check that we don't have a shard associated with a node with the same index name (we have a single shard)
for (MutableShardRouting shardRoutingEntry : routingNode) {
assertThat(encounteredIndices, not(hasItem(shardRoutingEntry.index())));
encounteredIndices.add(shardRoutingEntry.index());
}
}
logger.info("Adding additional " + (numberOfIndices / 2) + " nodes, nothing should change");
nodesBuilder = newNodesBuilder().putAll(clusterState.nodes());
for (int i = (numberOfIndices / 2); i < numberOfIndices; i++) {
nodesBuilder.put(newNode("node" + i));
}
prevRoutingTable = routingTable;
clusterState = newClusterStateBuilder().state(clusterState).nodes(nodesBuilder).build();
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(false));
logger.info("Marking the shard as started");
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
int numberOfRelocatingShards = 0;
int numberOfStartedShards = 0;
for (int i = 0; i < numberOfIndices; i++) {
assertThat(routingTable.index("test" + i).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).unassigned(), equalTo(false));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).state(), anyOf(equalTo(STARTED), equalTo(RELOCATING)));
if (routingTable.index("test" + i).shard(0).shards().get(0).state() == STARTED) {
numberOfStartedShards++;
} else if (routingTable.index("test" + i).shard(0).shards().get(0).state() == RELOCATING) {
numberOfRelocatingShards++;
}
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).primary(), equalTo(true));
// make sure we still have 2 shards either relocating or started on the first 25 nodes (still)
String nodeId = routingTable.index("test" + i).shard(0).shards().get(0).currentNodeId();
int nodeIndex = Integer.parseInt(nodeId.substring("node".length()));
assertThat(nodeIndex, lessThan(25));
}
assertThat(numberOfRelocatingShards, equalTo(25));
assertThat(numberOfStartedShards, equalTo(25));
}
@Test public void testMultiIndexUnevenNodes() {
ShardsAllocation strategy = new ShardsAllocation(settingsBuilder()
.put("cluster.routing.allocation.concurrent_recoveries", 10)
.put("cluster.routing.allocation.allow_rebalance", "always")
.put("cluster.routing.allocation.cluster_concurrent_rebalance", -1)
.build());
final int numberOfIndices = 10;
logger.info("Building initial routing table with " + numberOfIndices + " indices");
MetaData.Builder metaDataBuilder = newMetaDataBuilder();
for (int i = 0; i < numberOfIndices; i++) {
metaDataBuilder.put(newIndexMetaDataBuilder("test" + i).numberOfShards(1).numberOfReplicas(0));
}
MetaData metaData = metaDataBuilder.build();
RoutingTable.Builder routingTableBuilder = routingTable();
for (int i = 0; i < numberOfIndices; i++) {
routingTableBuilder.add(indexRoutingTable("test" + i).initializeEmpty(metaData.index("test" + i)));
}
RoutingTable routingTable = routingTableBuilder.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
assertThat(routingTable.indicesRouting().size(), equalTo(numberOfIndices));
logger.info("Starting 3 nodes and rerouting");
clusterState = newClusterStateBuilder().state(clusterState)
.nodes(newNodesBuilder().put(newNode("node1")).put(newNode("node2")).put(newNode("node3")))
.build();
RoutingTable prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
for (int i = 0; i < numberOfIndices; i++) {
assertThat(routingTable.index("test" + i).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).state(), equalTo(INITIALIZING));
}
RoutingNodes routingNodes = clusterState.routingNodes();
assertThat(routingNodes.numberOfShardsOfType(INITIALIZING), equalTo(numberOfIndices));
assertThat(routingNodes.node("node1").numberOfShardsWithState(INITIALIZING), anyOf(equalTo(3), equalTo(4)));
assertThat(routingNodes.node("node2").numberOfShardsWithState(INITIALIZING), anyOf(equalTo(3), equalTo(4)));
assertThat(routingNodes.node("node2").numberOfShardsWithState(INITIALIZING), anyOf(equalTo(3), equalTo(4)));
logger.info("Start two more nodes, things should remain the same");
clusterState = newClusterStateBuilder().state(clusterState)
.nodes(newNodesBuilder().putAll(clusterState.nodes()).put(newNode("node4")).put(newNode("node5")))
.build();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
prevRoutingTable = routingTable;
routingTable = strategy.reroute(clusterState).routingTable();
assertThat(prevRoutingTable == routingTable, equalTo(true));
routingNodes = clusterState.routingNodes();
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
assertThat(prevRoutingTable != routingTable, equalTo(true));
for (int i = 0; i < numberOfIndices; i++) {
assertThat(routingTable.index("test" + i).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).state(), anyOf(equalTo(RELOCATING), equalTo(STARTED)));
}
routingNodes = clusterState.routingNodes();
assertThat("4 source shard routing are relocating", routingNodes.numberOfShardsOfType(RELOCATING), equalTo(4));
assertThat("4 target shard routing are initializing", routingNodes.numberOfShardsOfType(INITIALIZING), equalTo(4));
logger.info("Now, mark the relocated as started");
prevRoutingTable = routingTable;
routingTable = strategy.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING)).routingTable();
clusterState = newClusterStateBuilder().state(clusterState).routingTable(routingTable).build();
// routingTable = strategy.reroute(new RoutingStrategyInfo(metaData, routingTable), nodes);
assertThat(prevRoutingTable != routingTable, equalTo(true));
for (int i = 0; i < numberOfIndices; i++) {
assertThat(routingTable.index("test" + i).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().size(), equalTo(1));
assertThat(routingTable.index("test" + i).shard(0).shards().get(0).state(), anyOf(equalTo(RELOCATING), equalTo(STARTED)));
}
routingNodes = clusterState.routingNodes();
assertThat(routingNodes.numberOfShardsOfType(STARTED), equalTo(numberOfIndices));
for (RoutingNode routingNode : routingNodes) {
assertThat(routingNode.numberOfShardsWithState(STARTED), equalTo(2));
}
}
}