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* 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 com.google.common.collect.ImmutableMap;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
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.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRoutingState;
import org.elasticsearch.cluster.routing.allocation.command.AllocateAllocationCommand;
import org.elasticsearch.cluster.routing.allocation.command.AllocationCommands;
import org.elasticsearch.cluster.routing.allocation.command.CancelAllocationCommand;
import org.elasticsearch.cluster.routing.allocation.command.MoveAllocationCommand;
import org.elasticsearch.cluster.routing.allocation.decider.DisableAllocationDecider;
import org.elasticsearch.common.io.stream.BytesStreamInput;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.test.ElasticsearchAllocationTestCase;
import org.junit.Test;
import static org.elasticsearch.cluster.routing.ShardRoutingState.*;
import static org.elasticsearch.common.settings.ImmutableSettings.settingsBuilder;
import static org.hamcrest.Matchers.equalTo;
/**
*/
public class AllocationCommandsTests extends ElasticsearchAllocationTestCase {
private final ESLogger logger = Loggers.getLogger(AllocationCommandsTests.class);
@Test
public void moveShardCommand() {
AllocationService allocation = createAllocationService(settingsBuilder().put("cluster.routing.allocation.concurrent_recoveries", 10).build());
logger.info("creating an index with 1 shard, no replica");
MetaData metaData = MetaData.builder()
.put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(0))
.build();
RoutingTable routingTable = RoutingTable.builder()
.addAsNew(metaData.index("test"))
.build();
ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.DEFAULT).metaData(metaData).routingTable(routingTable).build();
logger.info("adding two nodes and performing rerouting");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().put(newNode("node1")).put(newNode("node2"))).build();
RoutingAllocation.Result rerouteResult = allocation.reroute(clusterState);
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
logger.info("start primary shard");
rerouteResult = allocation.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
logger.info("move the shard");
String existingNodeId = clusterState.routingTable().index("test").shard(0).primaryShard().currentNodeId();
String toNodeId;
if ("node1".equals(existingNodeId)) {
toNodeId = "node2";
} else {
toNodeId = "node1";
}
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new MoveAllocationCommand(new ShardId("test", 0), existingNodeId, toNodeId)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node(existingNodeId).get(0).state(), equalTo(ShardRoutingState.RELOCATING));
assertThat(clusterState.routingNodes().node(toNodeId).get(0).state(), equalTo(ShardRoutingState.INITIALIZING));
logger.info("finish moving the shard");
rerouteResult = allocation.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node(existingNodeId).isEmpty(), equalTo(true));
assertThat(clusterState.routingNodes().node(toNodeId).get(0).state(), equalTo(ShardRoutingState.STARTED));
}
@Test
public void allocateCommand() {
AllocationService allocation = createAllocationService(settingsBuilder()
.put(DisableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_DISABLE_NEW_ALLOCATION, true)
.put(DisableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_DISABLE_ALLOCATION, true)
.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.DEFAULT).metaData(metaData).routingTable(routingTable).build();
logger.info("--> adding 3 nodes on same rack and do rerouting");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.put(newNode("node1"))
.put(newNode("node2"))
.put(newNode("node3"))
.put(newNode("node4", ImmutableMap.of("data", Boolean.FALSE.toString())))
).build();
RoutingAllocation.Result rerouteResult = allocation.reroute(clusterState);
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().shardsWithState(INITIALIZING).size(), equalTo(0));
logger.info("--> allocating with primary flag set to false, should fail");
try {
allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node1", false)));
fail();
} catch (ElasticsearchIllegalArgumentException e) {
}
logger.info("--> allocating to non-data node, should fail");
try {
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node4", true)));
fail();
} catch (ElasticsearchIllegalArgumentException e) {
}
logger.info("--> allocating with primary flag set to true");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node1", true)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(INITIALIZING).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(0));
logger.info("--> start the primary shard");
rerouteResult = allocation.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(0));
logger.info("--> allocate the replica shard on the primary shard node, should fail");
try {
allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node1", false)));
fail();
} catch (ElasticsearchIllegalArgumentException e) {
}
logger.info("--> allocate the replica shard on on the second node");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node2", false)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> start the replica shard");
rerouteResult = allocation.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(STARTED).size(), equalTo(1));
logger.info("--> verify that we fail when there are no unassigned shards");
try {
allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node3", false)));
fail();
} catch (ElasticsearchIllegalArgumentException e) {
}
}
@Test
public void cancelCommand() {
AllocationService allocation = createAllocationService(settingsBuilder()
.put(DisableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_DISABLE_NEW_ALLOCATION, true)
.put(DisableAllocationDecider.CLUSTER_ROUTING_ALLOCATION_DISABLE_ALLOCATION, true)
.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.DEFAULT).metaData(metaData).routingTable(routingTable).build();
logger.info("--> adding 3 nodes");
clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
.put(newNode("node1"))
.put(newNode("node2"))
.put(newNode("node3"))
).build();
RoutingAllocation.Result rerouteResult = allocation.reroute(clusterState);
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().shardsWithState(INITIALIZING).size(), equalTo(0));
logger.info("--> allocating with primary flag set to true");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node1", true)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(INITIALIZING).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(0));
logger.info("--> cancel primary allocation, make sure it fails...");
try {
allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand(new ShardId("test", 0), "node1", false)));
fail();
} catch (ElasticsearchIllegalArgumentException e) {
}
logger.info("--> start the primary shard");
rerouteResult = allocation.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(0));
logger.info("--> cancel primary allocation, make sure it fails...");
try {
allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand(new ShardId("test", 0), "node1", false)));
fail();
} catch (ElasticsearchIllegalArgumentException e) {
}
logger.info("--> allocate the replica shard on on the second node");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node2", false)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> cancel the relocation allocation");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand(new ShardId("test", 0), "node2", false)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(0));
assertThat(clusterState.routingNodes().node("node3").size(), equalTo(0));
logger.info("--> allocate the replica shard on on the second node");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node2", false)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> cancel the primary being replicated, make sure it fails");
try {
allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand(new ShardId("test", 0), "node1", false)));
fail();
} catch (ElasticsearchIllegalArgumentException e) {
}
logger.info("--> start the replica shard");
rerouteResult = allocation.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(STARTED).size(), equalTo(1));
logger.info("--> cancel allocation of the replica shard");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand(new ShardId("test", 0), "node2", false)));
assertThat(rerouteResult.changed(), equalTo(true));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(0));
assertThat(clusterState.routingNodes().node("node3").size(), equalTo(0));
logger.info("--> allocate the replica shard on on the second node");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new AllocateAllocationCommand(new ShardId("test", 0), "node2", false)));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(rerouteResult.changed(), equalTo(true));
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> start the replica shard");
rerouteResult = allocation.applyStartedShards(clusterState, clusterState.routingNodes().shardsWithState(INITIALIZING));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(STARTED).size(), equalTo(1));
logger.info("--> move the replica shard");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new MoveAllocationCommand(new ShardId("test", 0), "node2", "node3")));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(RELOCATING).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node3").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node3").shardsWithState(INITIALIZING).size(), equalTo(1));
logger.info("--> cancel the move of the replica shard");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand(new ShardId("test", 0), "node3", false)));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node1").shardsWithState(STARTED).size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").size(), equalTo(1));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(STARTED).size(), equalTo(1));
logger.info("--> cancel the primary allocation (with allow_primary set to true)");
rerouteResult = allocation.reroute(clusterState, new AllocationCommands(new CancelAllocationCommand(new ShardId("test", 0), "node1", true)));
clusterState = ClusterState.builder(clusterState).routingTable(rerouteResult.routingTable()).build();
assertThat(rerouteResult.changed(), equalTo(true));
assertThat(clusterState.routingNodes().node("node2").shardsWithState(STARTED).get(0).primary(), equalTo(true));
assertThat(clusterState.routingNodes().node("node1").size(), equalTo(0));
assertThat(clusterState.routingNodes().node("node3").size(), equalTo(0));
}
@Test
public void serialization() throws Exception {
AllocationCommands commands = new AllocationCommands(
new AllocateAllocationCommand(new ShardId("test", 1), "node1", true),
new MoveAllocationCommand(new ShardId("test", 3), "node2", "node3"),
new CancelAllocationCommand(new ShardId("test", 4), "node5", true)
);
BytesStreamOutput bytes = new BytesStreamOutput();
AllocationCommands.writeTo(commands, bytes);
AllocationCommands sCommands = AllocationCommands.readFrom(new BytesStreamInput(bytes.bytes()));
assertThat(sCommands.commands().size(), equalTo(3));
assertThat(((AllocateAllocationCommand) (sCommands.commands().get(0))).shardId(), equalTo(new ShardId("test", 1)));
assertThat(((AllocateAllocationCommand) (sCommands.commands().get(0))).node(), equalTo("node1"));
assertThat(((AllocateAllocationCommand) (sCommands.commands().get(0))).allowPrimary(), equalTo(true));
assertThat(((MoveAllocationCommand) (sCommands.commands().get(1))).shardId(), equalTo(new ShardId("test", 3)));
assertThat(((MoveAllocationCommand) (sCommands.commands().get(1))).fromNode(), equalTo("node2"));
assertThat(((MoveAllocationCommand) (sCommands.commands().get(1))).toNode(), equalTo("node3"));
assertThat(((CancelAllocationCommand) (sCommands.commands().get(2))).shardId(), equalTo(new ShardId("test", 4)));
assertThat(((CancelAllocationCommand) (sCommands.commands().get(2))).node(), equalTo("node5"));
assertThat(((CancelAllocationCommand) (sCommands.commands().get(2))).allowPrimary(), equalTo(true));
}
@Test
public void xContent() throws Exception {
String commands = "{\n" +
" \"commands\" : [\n" +
" {\"allocate\" : {\"index\" : \"test\", \"shard\" : 1, \"node\" : \"node1\", \"allow_primary\" : true}}\n" +
" ,{\"move\" : {\"index\" : \"test\", \"shard\" : 3, \"from_node\" : \"node2\", \"to_node\" : \"node3\"}} \n" +
" ,{\"cancel\" : {\"index\" : \"test\", \"shard\" : 4, \"node\" : \"node5\", \"allow_primary\" : true}} \n" +
" ]\n" +
"}\n";
XContentParser parser = XContentFactory.xContent(XContentType.JSON).createParser(commands);
// move two tokens, parser expected to be "on" `commands` field
parser.nextToken();
parser.nextToken();
AllocationCommands sCommands = AllocationCommands.fromXContent(parser);
assertThat(sCommands.commands().size(), equalTo(3));
assertThat(((AllocateAllocationCommand) (sCommands.commands().get(0))).shardId(), equalTo(new ShardId("test", 1)));
assertThat(((AllocateAllocationCommand) (sCommands.commands().get(0))).node(), equalTo("node1"));
assertThat(((AllocateAllocationCommand) (sCommands.commands().get(0))).allowPrimary(), equalTo(true));
assertThat(((MoveAllocationCommand) (sCommands.commands().get(1))).shardId(), equalTo(new ShardId("test", 3)));
assertThat(((MoveAllocationCommand) (sCommands.commands().get(1))).fromNode(), equalTo("node2"));
assertThat(((MoveAllocationCommand) (sCommands.commands().get(1))).toNode(), equalTo("node3"));
assertThat(((CancelAllocationCommand) (sCommands.commands().get(2))).shardId(), equalTo(new ShardId("test", 4)));
assertThat(((CancelAllocationCommand) (sCommands.commands().get(2))).node(), equalTo("node5"));
assertThat(((CancelAllocationCommand) (sCommands.commands().get(2))).allowPrimary(), equalTo(true));
}
}