Examples with ReplicaAfterPrimaryActiveAllocationDecider org.opensearch.cluster.routing.allocation.decider.ReplicaAfterPrimaryActiveAllocationDecider used on opensource projects

Example 1 with ReplicaAfterPrimaryActiveAllocationDecider

use of org.opensearch.cluster.routing.allocation.decider.ReplicaAfterPrimaryActiveAllocationDecider in project OpenSearch by opensearch-project.

the class ClusterModule method createAllocationDeciders.

// TODO: this is public so allocation benchmark can access the default deciders...can we do that in another way?
/**
 * Return a new {@link AllocationDecider} instance with builtin deciders as well as those from plugins.
 */
public static Collection<AllocationDecider> createAllocationDeciders(Settings settings, ClusterSettings clusterSettings, List<ClusterPlugin> clusterPlugins) {
    // collect deciders by class so that we can detect duplicates
    Map<Class, AllocationDecider> deciders = new LinkedHashMap<>();
    addAllocationDecider(deciders, new MaxRetryAllocationDecider());
    addAllocationDecider(deciders, new ResizeAllocationDecider());
    addAllocationDecider(deciders, new ReplicaAfterPrimaryActiveAllocationDecider());
    addAllocationDecider(deciders, new RebalanceOnlyWhenActiveAllocationDecider());
    addAllocationDecider(deciders, new ClusterRebalanceAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new ConcurrentRebalanceAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new ConcurrentRecoveriesAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new EnableAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new NodeVersionAllocationDecider());
    addAllocationDecider(deciders, new SnapshotInProgressAllocationDecider());
    addAllocationDecider(deciders, new RestoreInProgressAllocationDecider());
    addAllocationDecider(deciders, new FilterAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new SameShardAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new DiskThresholdDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new ThrottlingAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new ShardsLimitAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new AwarenessAllocationDecider(settings, clusterSettings));
    addAllocationDecider(deciders, new NodeLoadAwareAllocationDecider(settings, clusterSettings));
    clusterPlugins.stream().flatMap(p -> p.createAllocationDeciders(settings, clusterSettings).stream()).forEach(d -> addAllocationDecider(deciders, d));
    return deciders.values();
}

Example 2 with ReplicaAfterPrimaryActiveAllocationDecider

use of org.opensearch.cluster.routing.allocation.decider.ReplicaAfterPrimaryActiveAllocationDecider in project OpenSearch by opensearch-project.

the class RandomAllocationDeciderTests method testRandomDecisions.

/* This test will make random allocation decision on a growing and shrinking
     * cluster leading to a random distribution of the shards. After a certain
     * amount of iterations the test allows allocation unless the same shard is
     * already allocated on a node and balances the cluster to gain optimal
     * balance.*/
public void testRandomDecisions() {
    RandomAllocationDecider randomAllocationDecider = new RandomAllocationDecider(random());
    AllocationService strategy = new AllocationService(new AllocationDeciders(new HashSet<>(Arrays.asList(new SameShardAllocationDecider(Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)), new ReplicaAfterPrimaryActiveAllocationDecider(), randomAllocationDecider))), new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), EmptyClusterInfoService.INSTANCE, EmptySnapshotsInfoService.INSTANCE);
    int indices = scaledRandomIntBetween(1, 20);
    Builder metaBuilder = Metadata.builder();
    int maxNumReplicas = 1;
    int totalNumShards = 0;
    for (int i = 0; i < indices; i++) {
        int replicas = scaledRandomIntBetween(0, 6);
        maxNumReplicas = Math.max(maxNumReplicas, replicas + 1);
        int numShards = scaledRandomIntBetween(1, 20);
        totalNumShards += numShards * (replicas + 1);
        metaBuilder.put(IndexMetadata.builder("INDEX_" + i).settings(settings(Version.CURRENT)).numberOfShards(numShards).numberOfReplicas(replicas));
    }
    Metadata metadata = metaBuilder.build();
    RoutingTable.Builder routingTableBuilder = RoutingTable.builder();
    for (int i = 0; i < indices; i++) {
        routingTableBuilder.addAsNew(metadata.index("INDEX_" + i));
    }
    RoutingTable initialRoutingTable = routingTableBuilder.build();
    ClusterState clusterState = ClusterState.builder(org.opensearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metadata(metadata).routingTable(initialRoutingTable).build();
    int numIters = scaledRandomIntBetween(5, 15);
    int nodeIdCounter = 0;
    int atMostNodes = scaledRandomIntBetween(Math.max(1, maxNumReplicas), 15);
    final boolean frequentNodes = randomBoolean();
    for (int i = 0; i < numIters; i++) {
        logger.info("Start iteration [{}]", i);
        ClusterState.Builder stateBuilder = ClusterState.builder(clusterState);
        DiscoveryNodes.Builder newNodesBuilder = DiscoveryNodes.builder(clusterState.nodes());
        if (clusterState.nodes().getSize() <= atMostNodes && (nodeIdCounter == 0 || (frequentNodes ? frequently() : rarely()))) {
            int numNodes = scaledRandomIntBetween(1, 3);
            for (int j = 0; j < numNodes; j++) {
                logger.info("adding node [{}]", nodeIdCounter);
                newNodesBuilder.add(newNode("NODE_" + (nodeIdCounter++)));
            }
        }
        boolean nodesRemoved = false;
        if (nodeIdCounter > 1 && rarely()) {
            int nodeId = scaledRandomIntBetween(0, nodeIdCounter - 2);
            final String node = "NODE_" + nodeId;
            boolean safeToRemove = true;
            RoutingNode routingNode = clusterState.getRoutingNodes().node(node);
            for (ShardRouting shard : routingNode != null ? routingNode : Collections.<ShardRouting>emptyList()) {
                if (shard.active() && shard.primary()) {
                    // make sure there is an active replica to prevent from going red
                    if (clusterState.routingTable().shardRoutingTable(shard.shardId()).activeShards().size() <= 1) {
                        safeToRemove = false;
                        break;
                    }
                }
            }
            if (safeToRemove) {
                logger.info("removing node [{}]", nodeId);
                newNodesBuilder.remove(node);
                nodesRemoved = true;
            } else {
                logger.debug("not removing node [{}] as it holds a primary with no replacement", nodeId);
            }
        }
        stateBuilder.nodes(newNodesBuilder.build());
        clusterState = stateBuilder.build();
        if (nodesRemoved) {
            clusterState = strategy.disassociateDeadNodes(clusterState, true, "reroute");
        } else {
            clusterState = strategy.reroute(clusterState, "reroute");
        }
        if (clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size() > 0) {
            clusterState = startInitializingShardsAndReroute(strategy, clusterState);
        }
    }
    logger.info("Fill up nodes such that every shard can be allocated");
    if (clusterState.nodes().getSize() < maxNumReplicas) {
        ClusterState.Builder stateBuilder = ClusterState.builder(clusterState);
        DiscoveryNodes.Builder newNodesBuilder = DiscoveryNodes.builder(clusterState.nodes());
        for (int j = 0; j < (maxNumReplicas - clusterState.nodes().getSize()); j++) {
            logger.info("adding node [{}]", nodeIdCounter);
            newNodesBuilder.add(newNode("NODE_" + (nodeIdCounter++)));
        }
        stateBuilder.nodes(newNodesBuilder.build());
        clusterState = stateBuilder.build();
    }
    randomAllocationDecider.alwaysSayYes = true;
    logger.info("now say YES to everything");
    int iterations = 0;
    do {
        iterations++;
        clusterState = strategy.reroute(clusterState, "reroute");
        if (clusterState.getRoutingNodes().shardsWithState(INITIALIZING).size() > 0) {
            clusterState = startInitializingShardsAndReroute(strategy, clusterState);
        }
    } while (clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.INITIALIZING).size() != 0 || clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.UNASSIGNED).size() != 0 && iterations < 200);
    logger.info("Done Balancing after [{}] iterations. State:\n{}", iterations, clusterState);
    // we stop after 200 iterations if it didn't stabelize by then something is likely to be wrong
    assertThat("max num iteration exceeded", iterations, Matchers.lessThan(200));
    assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.INITIALIZING).size(), equalTo(0));
    assertThat(clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.UNASSIGNED).size(), equalTo(0));
    int shards = clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.STARTED).size();
    assertThat(shards, equalTo(totalNumShards));
    final int numNodes = clusterState.nodes().getSize();
    final int upperBound = (int) Math.round(((shards / numNodes) * 1.10));
    final int lowerBound = (int) Math.round(((shards / numNodes) * 0.90));
    for (int i = 0; i < nodeIdCounter; i++) {
        if (clusterState.getRoutingNodes().node("NODE_" + i) == null) {
            continue;
        }
        assertThat(clusterState.getRoutingNodes().node("NODE_" + i).size(), Matchers.anyOf(Matchers.anyOf(equalTo((shards / numNodes) + 1), equalTo((shards / numNodes) - 1), equalTo((shards / numNodes))), Matchers.allOf(Matchers.greaterThanOrEqualTo(lowerBound), Matchers.lessThanOrEqualTo(upperBound))));
    }
}

Example 3 with ReplicaAfterPrimaryActiveAllocationDecider

use of org.opensearch.cluster.routing.allocation.decider.ReplicaAfterPrimaryActiveAllocationDecider in project OpenSearch by opensearch-project.

the class NodeVersionAllocationDeciderTests method testRestoreDoesNotAllocateSnapshotOnOlderNodes.

public void testRestoreDoesNotAllocateSnapshotOnOlderNodes() {
    final DiscoveryNode newNode = new DiscoveryNode("newNode", buildNewFakeTransportAddress(), emptyMap(), MASTER_DATA_ROLES, Version.CURRENT);
    final DiscoveryNode oldNode1 = new DiscoveryNode("oldNode1", buildNewFakeTransportAddress(), emptyMap(), MASTER_DATA_ROLES, VersionUtils.getPreviousVersion());
    final DiscoveryNode oldNode2 = new DiscoveryNode("oldNode2", buildNewFakeTransportAddress(), emptyMap(), MASTER_DATA_ROLES, VersionUtils.getPreviousVersion());
    final Snapshot snapshot = new Snapshot("rep1", new SnapshotId("snp1", UUIDs.randomBase64UUID()));
    final IndexId indexId = new IndexId("test", UUIDs.randomBase64UUID(random()));
    final int numberOfShards = randomIntBetween(1, 3);
    final IndexMetadata.Builder indexMetadata = IndexMetadata.builder("test").settings(settings(Version.CURRENT)).numberOfShards(numberOfShards).numberOfReplicas(randomIntBetween(0, 3));
    for (int i = 0; i < numberOfShards; i++) {
        indexMetadata.putInSyncAllocationIds(i, Collections.singleton("_test_"));
    }
    Metadata metadata = Metadata.builder().put(indexMetadata).build();
    final ImmutableOpenMap.Builder<InternalSnapshotsInfoService.SnapshotShard, Long> snapshotShardSizes = ImmutableOpenMap.builder(numberOfShards);
    final Index index = metadata.index("test").getIndex();
    for (int i = 0; i < numberOfShards; i++) {
        final ShardId shardId = new ShardId(index, i);
        snapshotShardSizes.put(new InternalSnapshotsInfoService.SnapshotShard(snapshot, indexId, shardId), randomNonNegativeLong());
    }
    ClusterState state = ClusterState.builder(org.opensearch.cluster.ClusterName.CLUSTER_NAME_SETTING.getDefault(Settings.EMPTY)).metadata(metadata).routingTable(RoutingTable.builder().addAsRestore(metadata.index("test"), new SnapshotRecoverySource(UUIDs.randomBase64UUID(), snapshot, Version.CURRENT, indexId)).build()).nodes(DiscoveryNodes.builder().add(newNode).add(oldNode1).add(oldNode2)).build();
    AllocationDeciders allocationDeciders = new AllocationDeciders(Arrays.asList(new ReplicaAfterPrimaryActiveAllocationDecider(), new NodeVersionAllocationDecider()));
    AllocationService strategy = new MockAllocationService(allocationDeciders, new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), EmptyClusterInfoService.INSTANCE, () -> new SnapshotShardSizeInfo(snapshotShardSizes.build()));
    state = strategy.reroute(state, new AllocationCommands(), true, false).getClusterState();
    // Make sure that primary shards are only allocated on the new node
    for (int i = 0; i < numberOfShards; i++) {
        assertEquals("newNode", state.routingTable().index("test").getShards().get(i).primaryShard().currentNodeId());
    }
}

Example 4 with ReplicaAfterPrimaryActiveAllocationDecider

use of org.opensearch.cluster.routing.allocation.decider.ReplicaAfterPrimaryActiveAllocationDecider in project OpenSearch by opensearch-project.

the class GatewayServiceTests method createService.

private GatewayService createService(final Settings.Builder settings) {
    final ClusterService clusterService = new ClusterService(Settings.builder().put("cluster.name", "GatewayServiceTests").build(), new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS), null);
    final AllocationService allocationService = new AllocationService(new AllocationDeciders(new HashSet<>(Arrays.asList(new SameShardAllocationDecider(Settings.EMPTY, new ClusterSettings(Settings.EMPTY, ClusterSettings.BUILT_IN_CLUSTER_SETTINGS)), new ReplicaAfterPrimaryActiveAllocationDecider()))), new TestGatewayAllocator(), new BalancedShardsAllocator(Settings.EMPTY), EmptyClusterInfoService.INSTANCE, EmptySnapshotsInfoService.INSTANCE);
    return new GatewayService(settings.build(), allocationService, clusterService, null, null, null);
}