FilterRoutingTests.java example

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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.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.RoutingTable;
import org.elasticsearch.cluster.routing.ShardRouting;
import org.elasticsearch.cluster.routing.ShardRoutingState;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.hamcrest.Matchers;

import java.util.List;

import static java.util.Collections.singletonMap;
import static org.elasticsearch.cluster.routing.ShardRoutingState.INITIALIZING;
import static org.elasticsearch.cluster.routing.ShardRoutingState.STARTED;
import static org.hamcrest.Matchers.equalTo;

public class FilterRoutingTests extends ESAllocationTestCase {
    private final Logger logger = Loggers.getLogger(FilterRoutingTests.class);

    public void testClusterFilters() {
        AllocationService strategy = createAllocationService(Settings.builder()
                .put("cluster.routing.allocation.include.tag1", "value1,value2")
                .put("cluster.routing.allocation.exclude.tag1", "value3,value4")
                .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 initialRoutingTable = RoutingTable.builder()
                .addAsNew(metaData.index("test"))
                .build();

        ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData).routingTable(initialRoutingTable).build();

        logger.info("--> adding four nodes and performing rerouting");
        clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
                .add(newNode("node1", singletonMap("tag1", "value1")))
                .add(newNode("node2", singletonMap("tag1", "value2")))
                .add(newNode("node3", singletonMap("tag1", "value3")))
                .add(newNode("node4", singletonMap("tag1", "value4")))
        ).build();
        clusterState = strategy.reroute(clusterState, "reroute");
        assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(2));

        logger.info("--> start the shards (primaries)");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        logger.info("--> start the shards (replicas)");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        logger.info("--> make sure shards are only allocated on tag1 with value1 and value2");
        List<ShardRouting> startedShards = clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED);
        assertThat(startedShards.size(), equalTo(4));
        for (ShardRouting startedShard : startedShards) {
            assertThat(startedShard.currentNodeId(), Matchers.anyOf(equalTo("node1"), equalTo("node2")));
        }
    }

    public void testIndexFilters() {
        AllocationService strategy = createAllocationService(Settings.builder()
                .build());

        logger.info("Building initial routing table");

        MetaData initialMetaData = MetaData.builder()
                .put(IndexMetaData.builder("test").settings(settings(Version.CURRENT)
                        .put("index.number_of_shards", 2)
                        .put("index.number_of_replicas", 1)
                        .put("index.routing.allocation.include.tag1", "value1,value2")
                        .put("index.routing.allocation.exclude.tag1", "value3,value4")
                        .build()))
                .build();

        RoutingTable initialRoutingTable = RoutingTable.builder()
                .addAsNew(initialMetaData.index("test"))
                .build();

        ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(initialMetaData).routingTable(initialRoutingTable).build();

        logger.info("--> adding two nodes and performing rerouting");
        clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder()
                .add(newNode("node1", singletonMap("tag1", "value1")))
                .add(newNode("node2", singletonMap("tag1", "value2")))
                .add(newNode("node3", singletonMap("tag1", "value3")))
                .add(newNode("node4", singletonMap("tag1", "value4")))
        ).build();
        clusterState = strategy.reroute(clusterState, "reroute");
        assertThat(clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size(), equalTo(2));

        logger.info("--> start the shards (primaries)");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        logger.info("--> start the shards (replicas)");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        logger.info("--> make sure shards are only allocated on tag1 with value1 and value2");
        List<ShardRouting> startedShards = clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED);
        assertThat(startedShards.size(), equalTo(4));
        for (ShardRouting startedShard : startedShards) {
            assertThat(startedShard.currentNodeId(), Matchers.anyOf(equalTo("node1"), equalTo("node2")));
        }

        logger.info("--> switch between value2 and value4, shards should be relocating");

        IndexMetaData existingMetaData = clusterState.metaData().index("test");
        MetaData updatedMetaData = MetaData.builder()
            .put(IndexMetaData.builder(existingMetaData).settings(Settings.builder().put(existingMetaData.getSettings())
                .put("index.routing.allocation.include.tag1", "value1,value4")
                .put("index.routing.allocation.exclude.tag1", "value2,value3")
                .build()))
            .build();
        clusterState = ClusterState.builder(clusterState).metaData(updatedMetaData).build();
        clusterState = strategy.reroute(clusterState, "reroute");
        assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size(), equalTo(2));
        assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.RELOCATING).size(), equalTo(2));
        assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.INITIALIZING).size(), equalTo(2));

        logger.info("--> finish relocation");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        startedShards = clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED);
        assertThat(startedShards.size(), equalTo(4));
        for (ShardRouting startedShard : startedShards) {
            assertThat(startedShard.currentNodeId(), Matchers.anyOf(equalTo("node1"), equalTo("node4")));
        }
    }

    public void testConcurrentRecoveriesAfterShardsCannotRemainOnNode() {
        AllocationService strategy = createAllocationService(Settings.builder().build());

        logger.info("Building initial routing table");
        MetaData metaData = MetaData.builder()
                .put(IndexMetaData.builder("test1").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(0))
                .put(IndexMetaData.builder("test2").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(0))
                .build();

        RoutingTable initialRoutingTable = RoutingTable.builder()
                .addAsNew(metaData.index("test1"))
                .addAsNew(metaData.index("test2"))
                .build();

        ClusterState clusterState = ClusterState.builder(org.elasticsearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metaData(metaData).routingTable(initialRoutingTable).build();

        logger.info("--> adding two nodes and performing rerouting");
        DiscoveryNode node1 = newNode("node1", singletonMap("tag1", "value1"));
        DiscoveryNode node2 = newNode("node2", singletonMap("tag1", "value2"));
        clusterState = ClusterState.builder(clusterState).nodes(DiscoveryNodes.builder().add(node1).add(node2)).build();
        clusterState = strategy.reroute(clusterState, "reroute");
        assertThat(clusterState.getRoutingNodes().node(node1.getId()).numberOfShardsWithState(INITIALIZING), equalTo(2));
        assertThat(clusterState.getRoutingNodes().node(node2.getId()).numberOfShardsWithState(INITIALIZING), equalTo(2));

        logger.info("--> start the shards (only primaries)");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        logger.info("--> make sure all shards are started");
        assertThat(clusterState.getRoutingNodes().shardsWithState(STARTED).size(), equalTo(4));

        logger.info("--> disable allocation for node1 and reroute");
        strategy = createAllocationService(Settings.builder()
                .put("cluster.routing.allocation.node_concurrent_recoveries", "1")
                .put("cluster.routing.allocation.exclude.tag1", "value1")
                .build());

        logger.info("--> move shards from node1 to node2");
        clusterState = strategy.reroute(clusterState, "reroute");
        logger.info("--> check that concurrent recoveries only allows 1 shard to move");
        assertThat(clusterState.getRoutingNodes().node(node1.getId()).numberOfShardsWithState(STARTED), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node(node2.getId()).numberOfShardsWithState(INITIALIZING), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node(node2.getId()).numberOfShardsWithState(STARTED), equalTo(2));

        logger.info("--> start the shards (only primaries)");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        logger.info("--> move second shard from node1 to node2");
        clusterState = strategy.reroute(clusterState, "reroute");
        assertThat(clusterState.getRoutingNodes().node(node2.getId()).numberOfShardsWithState(INITIALIZING), equalTo(1));
        assertThat(clusterState.getRoutingNodes().node(node2.getId()).numberOfShardsWithState(STARTED), equalTo(3));

        logger.info("--> start the shards (only primaries)");
        clusterState = strategy.applyStartedShards(clusterState, clusterState.getRoutingNodes().shardsWithState(INITIALIZING));

        clusterState = strategy.reroute(clusterState, "reroute");
        assertThat(clusterState.getRoutingNodes().node(node2.getId()).numberOfShardsWithState(STARTED), equalTo(4));
    }
}