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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.cluster.routing.allocation;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.Version;
import org.elasticsearch.action.support.replication.ClusterStateCreationUtils;
import org.elasticsearch.cluster.ClusterInfo;
import org.elasticsearch.cluster.ClusterName;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ESAllocationTestCase;
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.RoutingNode;
import org.elasticsearch.cluster.routing.RoutingNodes;
import org.elasticsearch.cluster.routing.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.ShardRoutingState;
import org.elasticsearch.cluster.routing.TestShardRouting;
import org.elasticsearch.cluster.routing.allocation.decider.AllocationDeciders;
import org.elasticsearch.cluster.routing.allocation.decider.Decision;
import org.elasticsearch.cluster.routing.allocation.decider.SameShardAllocationDecider;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import java.util.Collections;
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 Logger logger = Loggers.getLogger(SameShardRoutingTests.class);
public void testSameHost() {
AllocationService strategy = createAllocationService(
Settings.builder().put(SameShardAllocationDecider.CLUSTER_ROUTING_ALLOCATION_SAME_HOST_SETTING.getKey(), 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", buildNewFakeTransportAddress(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT))
.add(new DiscoveryNode("node2", "node2", "node2", "test1", "test1", buildNewFakeTransportAddress(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT))).build();
clusterState = strategy.reroute(clusterState, "reroute");
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");
clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));
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", buildNewFakeTransportAddress(), emptyMap(),
MASTER_DATA_ROLES, Version.CURRENT))).build();
clusterState = strategy.reroute(clusterState, "reroute");
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"));
}
}
public void testForceAllocatePrimaryOnSameNodeNotAllowed() {
SameShardAllocationDecider decider = new SameShardAllocationDecider(
Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS));
ClusterState clusterState = ClusterStateCreationUtils.state("idx", randomIntBetween(2, 4), 1);
Index index = clusterState.getMetaData().index("idx").getIndex();
ShardRouting primaryShard = clusterState.routingTable().index(index).shard(0).primaryShard();
RoutingNode routingNode = clusterState.getRoutingNodes().node(primaryShard.currentNodeId());
RoutingAllocation routingAllocation = new RoutingAllocation(new AllocationDeciders(Settings.EMPTY, Collections.emptyList()),
new RoutingNodes(clusterState, false), clusterState, ClusterInfo.EMPTY, System.nanoTime(), false
);
// can't force allocate same shard copy to the same node
ShardRouting newPrimary = TestShardRouting.newShardRouting(primaryShard.shardId(), null, true, ShardRoutingState.UNASSIGNED);
Decision decision = decider.canForceAllocatePrimary(newPrimary, routingNode, routingAllocation);
assertEquals(Decision.Type.NO, decision.type());
// can force allocate to a different node
RoutingNode unassignedNode = null;
for (RoutingNode node : clusterState.getRoutingNodes()) {
if (node.isEmpty()) {
unassignedNode = node;
break;
}
}
decision = decider.canForceAllocatePrimary(newPrimary, unassignedNode, routingAllocation);
assertEquals(Decision.Type.YES, decision.type());
}
}