Examples with DiscoveryNodes org.opensearch.cluster.node.DiscoveryNodes used on opensource projects

Example 26 with DiscoveryNodes

use of org.opensearch.cluster.node.DiscoveryNodes in project OpenSearch by opensearch-project.

the class JoinTaskExecutor method execute.

@Override
public ClusterTasksResult<Task> execute(ClusterState currentState, List<Task> joiningNodes) throws Exception {
    final ClusterTasksResult.Builder<Task> results = ClusterTasksResult.builder();
    final DiscoveryNodes currentNodes = currentState.nodes();
    boolean nodesChanged = false;
    ClusterState.Builder newState;
    if (joiningNodes.size() == 1 && joiningNodes.get(0).isFinishElectionTask()) {
        return results.successes(joiningNodes).build(currentState);
    } else if (currentNodes.getMasterNode() == null && joiningNodes.stream().anyMatch(Task::isBecomeMasterTask)) {
        assert joiningNodes.stream().anyMatch(Task::isFinishElectionTask) : "becoming a cluster-manager but election is not finished " + joiningNodes;
        // use these joins to try and become the cluster-manager.
        // Note that we don't have to do any validation of the amount of joining nodes - the commit
        // during the cluster state publishing guarantees that we have enough
        newState = becomeClusterManagerAndTrimConflictingNodes(currentState, joiningNodes);
        nodesChanged = true;
    } else if (currentNodes.isLocalNodeElectedMaster() == false) {
        logger.trace("processing node joins, but we are not the cluster-manager. current cluster-manager: {}", currentNodes.getMasterNode());
        throw new NotMasterException("Node [" + currentNodes.getLocalNode() + "] not cluster-manager for join request");
    } else {
        newState = ClusterState.builder(currentState);
    }
    DiscoveryNodes.Builder nodesBuilder = DiscoveryNodes.builder(newState.nodes());
    assert nodesBuilder.isLocalNodeElectedMaster();
    Version minClusterNodeVersion = newState.nodes().getMinNodeVersion();
    Version maxClusterNodeVersion = newState.nodes().getMaxNodeVersion();
    // we only enforce major version transitions on a fully formed clusters
    final boolean enforceMajorVersion = currentState.getBlocks().hasGlobalBlock(STATE_NOT_RECOVERED_BLOCK) == false;
    // processing any joins
    Map<String, String> joiniedNodeNameIds = new HashMap<>();
    for (final Task joinTask : joiningNodes) {
        if (joinTask.isBecomeMasterTask() || joinTask.isFinishElectionTask()) {
        // noop
        } else if (currentNodes.nodeExistsWithSameRoles(joinTask.node()) && !currentNodes.nodeExistsWithBWCVersion(joinTask.node())) {
            logger.debug("received a join request for an existing node [{}]", joinTask.node());
        } else {
            final DiscoveryNode node = joinTask.node();
            try {
                if (enforceMajorVersion) {
                    ensureMajorVersionBarrier(node.getVersion(), minClusterNodeVersion);
                }
                ensureNodesCompatibility(node.getVersion(), minClusterNodeVersion, maxClusterNodeVersion);
                // we do this validation quite late to prevent race conditions between nodes joining and importing dangling indices
                // we have to reject nodes that don't support all indices we have in this cluster
                ensureIndexCompatibility(node.getVersion(), currentState.getMetadata());
                nodesBuilder.add(node);
                nodesChanged = true;
                minClusterNodeVersion = Version.min(minClusterNodeVersion, node.getVersion());
                maxClusterNodeVersion = Version.max(maxClusterNodeVersion, node.getVersion());
                if (node.isMasterNode()) {
                    joiniedNodeNameIds.put(node.getName(), node.getId());
                }
            } catch (IllegalArgumentException | IllegalStateException e) {
                results.failure(joinTask, e);
                continue;
            }
        }
        results.success(joinTask);
    }
    if (nodesChanged) {
        rerouteService.reroute("post-join reroute", Priority.HIGH, ActionListener.wrap(r -> logger.trace("post-join reroute completed"), e -> logger.debug("post-join reroute failed", e)));
        if (joiniedNodeNameIds.isEmpty() == false) {
            Set<CoordinationMetadata.VotingConfigExclusion> currentVotingConfigExclusions = currentState.getVotingConfigExclusions();
            Set<CoordinationMetadata.VotingConfigExclusion> newVotingConfigExclusions = currentVotingConfigExclusions.stream().map(e -> {
                // Update nodeId in VotingConfigExclusion when a new node with excluded node name joins
                if (CoordinationMetadata.VotingConfigExclusion.MISSING_VALUE_MARKER.equals(e.getNodeId()) && joiniedNodeNameIds.containsKey(e.getNodeName())) {
                    return new CoordinationMetadata.VotingConfigExclusion(joiniedNodeNameIds.get(e.getNodeName()), e.getNodeName());
                } else {
                    return e;
                }
            }).collect(Collectors.toSet());
            // if VotingConfigExclusions did get updated
            if (newVotingConfigExclusions.equals(currentVotingConfigExclusions) == false) {
                CoordinationMetadata.Builder coordMetadataBuilder = CoordinationMetadata.builder(currentState.coordinationMetadata()).clearVotingConfigExclusions();
                newVotingConfigExclusions.forEach(coordMetadataBuilder::addVotingConfigExclusion);
                Metadata newMetadata = Metadata.builder(currentState.metadata()).coordinationMetadata(coordMetadataBuilder.build()).build();
                return results.build(allocationService.adaptAutoExpandReplicas(newState.nodes(nodesBuilder).metadata(newMetadata).build()));
            }
        }
        return results.build(allocationService.adaptAutoExpandReplicas(newState.nodes(nodesBuilder).build()));
    } else {
        // for the joining node to finalize its join and set us as a cluster-manager
        return results.build(newState.build());
    }
}

Example 27 with DiscoveryNodes

use of org.opensearch.cluster.node.DiscoveryNodes in project OpenSearch by opensearch-project.

the class JoinTaskExecutor method becomeClusterManagerAndTrimConflictingNodes.

protected ClusterState.Builder becomeClusterManagerAndTrimConflictingNodes(ClusterState currentState, List<Task> joiningNodes) {
    assert currentState.nodes().getMasterNodeId() == null : currentState;
    DiscoveryNodes currentNodes = currentState.nodes();
    DiscoveryNodes.Builder nodesBuilder = DiscoveryNodes.builder(currentNodes);
    nodesBuilder.masterNodeId(currentState.nodes().getLocalNodeId());
    for (final Task joinTask : joiningNodes) {
        if (joinTask.isBecomeMasterTask()) {
            refreshDiscoveryNodeVersionAfterUpgrade(currentNodes, nodesBuilder);
        } else if (joinTask.isFinishElectionTask()) {
        // no-op
        } else {
            final DiscoveryNode joiningNode = joinTask.node();
            final DiscoveryNode nodeWithSameId = nodesBuilder.get(joiningNode.getId());
            if (nodeWithSameId != null && nodeWithSameId.equals(joiningNode) == false) {
                logger.debug("removing existing node [{}], which conflicts with incoming join from [{}]", nodeWithSameId, joiningNode);
                nodesBuilder.remove(nodeWithSameId.getId());
            }
            final DiscoveryNode nodeWithSameAddress = currentNodes.findByAddress(joiningNode.getAddress());
            if (nodeWithSameAddress != null && nodeWithSameAddress.equals(joiningNode) == false) {
                logger.debug("removing existing node [{}], which conflicts with incoming join from [{}]", nodeWithSameAddress, joiningNode);
                nodesBuilder.remove(nodeWithSameAddress.getId());
            }
        }
    }
    // now trim any left over dead nodes - either left there when the previous cluster-manager stepped down
    // or removed by us above
    ClusterState tmpState = ClusterState.builder(currentState).nodes(nodesBuilder).blocks(ClusterBlocks.builder().blocks(currentState.blocks()).removeGlobalBlock(NoMasterBlockService.NO_MASTER_BLOCK_ID)).build();
    logger.trace("becomeClusterManagerAndTrimConflictingNodes: {}", tmpState.nodes());
    allocationService.cleanCaches();
    tmpState = PersistentTasksCustomMetadata.disassociateDeadNodes(tmpState);
    return ClusterState.builder(allocationService.disassociateDeadNodes(tmpState, false, "removed dead nodes on election"));
}

Example 28 with DiscoveryNodes

use of org.opensearch.cluster.node.DiscoveryNodes in project OpenSearch by opensearch-project.

the class Coordinator method clusterStateWithNoClusterManagerBlock.

private ClusterState clusterStateWithNoClusterManagerBlock(ClusterState clusterState) {
    if (clusterState.nodes().getMasterNodeId() != null) {
        // remove block if it already exists before adding new one
        assert clusterState.blocks().hasGlobalBlockWithId(NO_MASTER_BLOCK_ID) == false : "NO_MASTER_BLOCK should only be added by Coordinator";
        final ClusterBlocks clusterBlocks = ClusterBlocks.builder().blocks(clusterState.blocks()).addGlobalBlock(noClusterManagerBlockService.getNoMasterBlock()).build();
        final DiscoveryNodes discoveryNodes = new DiscoveryNodes.Builder(clusterState.nodes()).masterNodeId(null).build();
        return ClusterState.builder(clusterState).blocks(clusterBlocks).nodes(discoveryNodes).build();
    } else {
        return clusterState;
    }
}

Example 29 with DiscoveryNodes

use of org.opensearch.cluster.node.DiscoveryNodes in project OpenSearch by opensearch-project.

the class VerifyNodeRepositoryAction method verify.

public void verify(String repository, String verificationToken, final ActionListener<List<DiscoveryNode>> listener) {
    final DiscoveryNodes discoNodes = clusterService.state().nodes();
    final DiscoveryNode localNode = discoNodes.getLocalNode();
    final ObjectContainer<DiscoveryNode> masterAndDataNodes = discoNodes.getMasterAndDataNodes().values();
    final List<DiscoveryNode> nodes = new ArrayList<>();
    for (ObjectCursor<DiscoveryNode> cursor : masterAndDataNodes) {
        DiscoveryNode node = cursor.value;
        if (RepositoriesService.isDedicatedVotingOnlyNode(node.getRoles()) == false) {
            nodes.add(node);
        }
    }
    final CopyOnWriteArrayList<VerificationFailure> errors = new CopyOnWriteArrayList<>();
    final AtomicInteger counter = new AtomicInteger(nodes.size());
    for (final DiscoveryNode node : nodes) {
        if (node.equals(localNode)) {
            try {
                doVerify(repository, verificationToken, localNode);
            } catch (Exception e) {
                logger.warn(() -> new ParameterizedMessage("[{}] failed to verify repository", repository), e);
                errors.add(new VerificationFailure(node.getId(), e));
            }
            if (counter.decrementAndGet() == 0) {
                finishVerification(repository, listener, nodes, errors);
            }
        } else {
            transportService.sendRequest(node, ACTION_NAME, new VerifyNodeRepositoryRequest(repository, verificationToken), new EmptyTransportResponseHandler(ThreadPool.Names.SAME) {

                @Override
                public void handleResponse(TransportResponse.Empty response) {
                    if (counter.decrementAndGet() == 0) {
                        finishVerification(repository, listener, nodes, errors);
                    }
                }

                @Override
                public void handleException(TransportException exp) {
                    errors.add(new VerificationFailure(node.getId(), exp));
                    if (counter.decrementAndGet() == 0) {
                        finishVerification(repository, listener, nodes, errors);
                    }
                }
            });
        }
    }
}

Example 30 with DiscoveryNodes

use of org.opensearch.cluster.node.DiscoveryNodes in project OpenSearch by opensearch-project.

the class IndexingPressureIT method getPrimaryReplicaNodeNames.

private Tuple<String, String> getPrimaryReplicaNodeNames() {
    IndicesStatsResponse response = client().admin().indices().prepareStats(INDEX_NAME).get();
    String primaryId = Stream.of(response.getShards()).map(ShardStats::getShardRouting).filter(ShardRouting::primary).findAny().get().currentNodeId();
    String replicaId = Stream.of(response.getShards()).map(ShardStats::getShardRouting).filter(sr -> sr.primary() == false).findAny().get().currentNodeId();
    DiscoveryNodes nodes = client().admin().cluster().prepareState().get().getState().nodes();
    String primaryName = nodes.get(primaryId).getName();
    String replicaName = nodes.get(replicaId).getName();
    return new Tuple<>(primaryName, replicaName);
}