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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.ClusterState;
import org.elasticsearch.cluster.metadata.IndexMetaData;
import org.elasticsearch.cluster.metadata.MetaData;
import org.elasticsearch.cluster.node.DiscoveryNodes;
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.elasticsearch.common.settings.Settings;
import org.elasticsearch.test.ESAllocationTestCase;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.STARTED;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.nullValue;
/**
*
*/
public class PrimaryElectionRoutingTests extends ESAllocationTestCase {
private final ESLogger logger = Loggers.getLogger(PrimaryElectionRoutingTests.class);
public void testBackupElectionToPrimaryWhenPrimaryCanBeAllocatedToAnotherNode() {
AllocationService strategy = createAllocationService(Settings.builder().put("cluster.routing.allocation.node_concurrent_recoveries", 10).build());
logger.info("Building initial routing table");
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(1))
.build();
RoutingTable routingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData).routingTable(routingTable).build();
logger.info("Adding two nodes and performing rerouting");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1"))).build();
RoutingAllocation.Result result = strategy.reroute(clusterState, "reroute");
clusterState = ClusterState.builder(clusterState).routingResult(result).build();
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).add(newNode("node2"))).build();
result = strategy.reroute(clusterState, "reroute");
clusterState = ClusterState.builder(clusterState).routingResult(result).build();
logger.info("Start the primary shard (on node1)");
RoutingNodes routingNodes = clusterState.getRoutingNodes();
result = strategy.applyStartedShards(clusterState, routingNodes.node("node1").shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingResult(result).build();
logger.info("Start the backup shard (on node2)");
routingNodes = clusterState.getRoutingNodes();
result = strategy.applyStartedShards(clusterState, routingNodes.node("node2").shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingResult(result).build();
logger.info("Adding third node and reroute and kill first node");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder(clusterState.nodes()).add(newNode("node3")).remove("node1")).build();
RoutingTable prevRoutingTable = clusterState.routingTable();
result = strategy.deassociateDeadNodes(clusterState, true, "reroute");
clusterState = ClusterState.builder(clusterState).routingResult(result).build();
routingNodes = clusterState.getRoutingNodes();
routingTable = clusterState.routingTable();
assertThat(prevRoutingTable != routingTable, equalTo(true));
assertThat(routingTable.index("test").shards().size(), equalTo(1));
assertThat(routingNodes.node("node1"), nullValue());
assertThat(routingNodes.node("node2").numberOfShardsWithState(STARTED), equalTo(1));
assertThat(routingNodes.node("node3").numberOfShardsWithState(INITIALIZING), equalTo(1));
// verify where the primary is
assertThat(routingTable.index("test").shard(0).primaryShard().currentNodeId(), equalTo("node2"));
assertThat(clusterState.metaData().index("test").primaryTerm(0), equalTo(2L));
assertThat(routingTable.index("test").shard(0).replicaShards().get(0).currentNodeId(), equalTo("node3"));
}
public void testRemovingInitializingReplicasIfPrimariesFails() {
AllocationService allocation = createAllocationService(Settings.builder().put("cluster.routing.allocation.node_concurrent_recoveries", 10).build());
logger.info("Building initial routing table");
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(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData).routingTable(routingTable).build();
logger.info("Adding two nodes and performing rerouting");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(newNode("node1")).add(newNode("node2"))).build();
RoutingAllocation.Result rerouteResult = allocation.reroute(clusterState, "reroute");
clusterState = ClusterState.builder(clusterState).routingResult(rerouteResult).build();
logger.info("Start the primary shards");
RoutingNodes routingNodes = clusterState.getRoutingNodes();
rerouteResult = allocation.applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingResult(rerouteResult).build();
routingNodes = clusterState.getRoutingNodes();
assertThat(routingNodes.shardsWithState(STARTED).size(), equalTo(2));
assertThat(routingNodes.shardsWithState(INITIALIZING).size(), equalTo(2));
assertThat(clusterState.metaData().index("test").primaryTerm(0), equalTo(1L));
assertThat(clusterState.metaData().index("test").primaryTerm(1), equalTo(1L));
// now, fail one node, while the replica is initializing, and it also holds a primary
logger.info("--> fail node with primary");
String nodeIdToFail = clusterState.routingTable().index("test").shard(0).primaryShard().currentNodeId();
String nodeIdRemaining = nodeIdToFail.equals("node1") ? "node2" : "node1";
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.add(newNode(nodeIdRemaining))
).build();
rerouteResult = allocation.deassociateDeadNodes(clusterState, true, "reroute");
clusterState = ClusterState.builder(clusterState).routingResult(rerouteResult).build();
routingNodes = clusterState.getRoutingNodes();
assertThat(routingNodes.shardsWithState(STARTED).size(), equalTo(1));
assertThat(routingNodes.shardsWithState(INITIALIZING).size(), equalTo(1));
assertThat(routingNodes.node(nodeIdRemaining).shardsWithState(INITIALIZING).get(0).primary(), equalTo(true));
assertThat(clusterState.metaData().index("test").primaryTerm(0), equalTo(2L));
}
}
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