@Test
  public void testSingleIndexShardFailed() {
    AllocationService strategy =
        createAllocationService(
            settingsBuilder().put("cluster.routing.allocation.concurrent_recoveries", 10).build());

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

    MetaData metaData =
        MetaData.builder()
            .put(IndexMetaData.builder("test").numberOfShards(1).numberOfReplicas(0))
            .build();

    RoutingTable routingTable = RoutingTable.builder().addAsNew(metaData.index("test")).build();

    ClusterState clusterState =
        ClusterState.builder().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 =
        ClusterState.builder(clusterState)
            .nodes(DiscoveryNodes.builder().put(newNode("node1")))
            .build();
    RoutingTable prevRoutingTable = routingTable;
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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 = ClusterState.builder(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());
  }
コード例 #2
0
 public void logShardStates(ClusterState state) {
   RoutingNodes rn = state.routingNodes();
   logger.info(
       "--> counts: total: {}, unassigned: {}, initializing: {}, relocating: {}, started: {}",
       rn.shards(
               new Predicate<MutableShardRouting>() {
                 @Override
                 public boolean apply(
                     org.elasticsearch.cluster.routing.MutableShardRouting input) {
                   return true;
                 }
               })
           .size(),
       rn.shardsWithState(UNASSIGNED).size(),
       rn.shardsWithState(INITIALIZING).size(),
       rn.shardsWithState(RELOCATING).size(),
       rn.shardsWithState(STARTED).size());
   logger.info(
       "--> unassigned: {}, initializing: {}, relocating: {}, started: {}",
       rn.shardsWithState(UNASSIGNED),
       rn.shardsWithState(INITIALIZING),
       rn.shardsWithState(RELOCATING),
       rn.shardsWithState(STARTED));
 }
  @Test
  public void testSingleIndexStartedShard() {
    AllocationService strategy =
        createAllocationService(
            settingsBuilder().put("cluster.routing.allocation.concurrent_recoveries", 10).build());

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

    MetaData metaData =
        MetaData.builder()
            .put(IndexMetaData.builder("test").numberOfShards(1).numberOfReplicas(0))
            .build();

    RoutingTable routingTable = RoutingTable.builder().addAsNew(metaData.index("test")).build();

    ClusterState clusterState =
        ClusterState.builder().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 =
        ClusterState.builder(clusterState)
            .nodes(DiscoveryNodes.builder().put(newNode("node1")))
            .build();
    RoutingTable prevRoutingTable = routingTable;
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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 = ClusterState.builder(clusterState).build();
    routingTable = strategy.reroute(clusterState).routingTable();
    assertThat(routingTable == prevRoutingTable, equalTo(true));
    clusterState = ClusterState.builder(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 = ClusterState.builder(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 =
        ClusterState.builder(clusterState)
            .nodes(DiscoveryNodes.builder(clusterState.nodes()).put(newNode("node2")))
            .build();
    prevRoutingTable = routingTable;
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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 =
        ClusterState.builder(clusterState)
            .nodes(DiscoveryNodes.builder(clusterState.nodes()).remove("node1"))
            .build();
    prevRoutingTable = routingTable;
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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 =
        ClusterState.builder(clusterState)
            .nodes(DiscoveryNodes.builder(clusterState.nodes()).put(newNode("node3")))
            .build();
    prevRoutingTable = routingTable;
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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 = ClusterState.builder(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 testMultiIndexUnevenNodes() {
    AllocationService strategy =
        createAllocationService(
            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 = MetaData.builder();
    for (int i = 0; i < numberOfIndices; i++) {
      metaDataBuilder.put(IndexMetaData.builder("test" + i).numberOfShards(1).numberOfReplicas(0));
    }
    MetaData metaData = metaDataBuilder.build();

    RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
    for (int i = 0; i < numberOfIndices; i++) {
      routingTableBuilder.addAsNew(metaData.index("test" + i));
    }
    RoutingTable routingTable = routingTableBuilder.build();

    ClusterState clusterState =
        ClusterState.builder().metaData(metaData).routingTable(routingTable).build();

    assertThat(routingTable.indicesRouting().size(), equalTo(numberOfIndices));

    logger.info("Starting 3 nodes and rerouting");
    clusterState =
        ClusterState.builder(clusterState)
            .nodes(
                DiscoveryNodes.builder()
                    .put(newNode("node1"))
                    .put(newNode("node2"))
                    .put(newNode("node3")))
            .build();
    RoutingTable prevRoutingTable = routingTable;
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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(numberOfShardsOfType(routingNodes, 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 =
        ClusterState.builder(clusterState)
            .nodes(
                DiscoveryNodes.builder(clusterState.nodes())
                    .put(newNode("node4"))
                    .put(newNode("node5")))
            .build();
    clusterState = ClusterState.builder(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 = ClusterState.builder(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",
        numberOfShardsOfType(routingNodes, RELOCATING),
        equalTo(4));
    assertThat(
        "4 target shard routing are initializing",
        numberOfShardsOfType(routingNodes, INITIALIZING),
        equalTo(4));

    logger.info("Now, mark the relocated as started");
    prevRoutingTable = routingTable;
    routingTable =
        strategy
            .applyStartedShards(clusterState, routingNodes.shardsWithState(INITIALIZING))
            .routingTable();
    clusterState = ClusterState.builder(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(numberOfShardsOfType(routingNodes, STARTED), equalTo(numberOfIndices));
    for (RoutingNode routingNode : routingNodes) {
      assertThat(routingNode.numberOfShardsWithState(STARTED), equalTo(2));
    }
  }
  @Test
  public void testMultiIndexEvenDistribution() {
    AllocationService strategy =
        createAllocationService(
            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 = MetaData.builder();
    for (int i = 0; i < numberOfIndices; i++) {
      metaDataBuilder.put(IndexMetaData.builder("test" + i).numberOfShards(1).numberOfReplicas(0));
    }
    MetaData metaData = metaDataBuilder.build();

    RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
    for (int i = 0; i < numberOfIndices; i++) {
      routingTableBuilder.addAsNew(metaData.index("test" + i));
    }
    RoutingTable routingTable = routingTableBuilder.build();
    ClusterState clusterState =
        ClusterState.builder().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 = DiscoveryNodes.builder();
    List<DiscoveryNode> nodes = newArrayList();
    for (int i = 0; i < (numberOfIndices / 2); i++) {
      nodesBuilder.put(newNode("node" + i));
    }
    RoutingTable prevRoutingTable = routingTable;
    clusterState = ClusterState.builder(clusterState).nodes(nodesBuilder).build();
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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.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 = DiscoveryNodes.builder(clusterState.nodes());
    for (int i = (numberOfIndices / 2); i < numberOfIndices; i++) {
      nodesBuilder.put(newNode("node" + i));
    }
    prevRoutingTable = routingTable;
    clusterState = ClusterState.builder(clusterState).nodes(nodesBuilder).build();
    routingTable = strategy.reroute(clusterState).routingTable();
    clusterState = ClusterState.builder(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 = ClusterState.builder(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));
  }