Examples with Host io.pravega.common.cluster.Host used on opensource projects

Example 1 with Host

use of io.pravega.common.cluster.Host in project pravega by pravega.

the class SegmentContainerMonitorTest method testMonitor.

private void testMonitor(HostControllerStore hostStore) throws Exception {
    // To coordinate the test cases.
    Semaphore sync = new Semaphore(0);
    // Decorating hostStore to add the coordination logic using semaphore.
    class MockHostControllerStore implements HostControllerStore {

        @Override
        public Map<Host, Set<Integer>> getHostContainersMap() {
            return hostStore.getHostContainersMap();
        }

        @Override
        public void updateHostContainersMap(Map<Host, Set<Integer>> newMapping) {
            hostStore.updateHostContainersMap(newMapping);
            // Notify the test case of the update.
            sync.release();
        }

        @Override
        public int getContainerCount() {
            return hostStore.getContainerCount();
        }

        @Override
        public Host getHostForSegment(String scope, String stream, int segmentNumber) {
            return null;
        }
    }
    SegmentContainerMonitor monitor = new SegmentContainerMonitor(new MockHostControllerStore(), zkClient, new UniformContainerBalancer(), 2);
    monitor.startAsync().awaitRunning();
    assertEquals(hostStore.getContainerCount(), Config.HOST_STORE_CONTAINER_COUNT);
    // Rebalance should be triggered for the very first attempt. Verify that no hosts are added to the store.
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    assertEquals(0, hostStore.getHostContainersMap().size());
    // New host added.
    cluster.registerHost(new Host("localhost1", 1, null));
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    assertEquals(1, hostStore.getHostContainersMap().size());
    // Multiple hosts added and removed.
    cluster.registerHost(new Host("localhost2", 2, null));
    cluster.registerHost(new Host("localhost3", 3, null));
    cluster.registerHost(new Host("localhost4", 4, null));
    cluster.deregisterHost(new Host("localhost1", 1, null));
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    assertEquals(3, hostStore.getHostContainersMap().size());
    // Add a host.
    cluster.registerHost(new Host("localhost1", 1, null));
    // Rebalance should not have been triggered since the min rebalance interval is not yet elapsed.
    assertEquals(3, hostStore.getHostContainersMap().size());
    // Wait for rebalance and verify the host update.
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    assertEquals(4, hostStore.getHostContainersMap().size());
    monitor.shutDown();
}

Example 2 with Host

use of io.pravega.common.cluster.Host in project pravega by pravega.

the class ControllerServiceStarter method startUp.

@Override
protected void startUp() {
    long traceId = LoggerHelpers.traceEnterWithContext(log, this.objectId, "startUp");
    log.info("Initiating controller service startUp");
    log.info("Controller serviceConfig = {}", serviceConfig.toString());
    log.info("Event processors enabled = {}", serviceConfig.getEventProcessorConfig().isPresent());
    log.info("Cluster listener enabled = {}", serviceConfig.isControllerClusterListenerEnabled());
    log.info("    Host monitor enabled = {}", serviceConfig.getHostMonitorConfig().isHostMonitorEnabled());
    log.info("     gRPC server enabled = {}", serviceConfig.getGRPCServerConfig().isPresent());
    log.info("     REST server enabled = {}", serviceConfig.getRestServerConfig().isPresent());
    final BucketStore bucketStore;
    final TaskMetadataStore taskMetadataStore;
    final HostControllerStore hostStore;
    final CheckpointStore checkpointStore;
    try {
        // Initialize the executor service.
        controllerExecutor = ExecutorServiceHelpers.newScheduledThreadPool(serviceConfig.getThreadPoolSize(), "controllerpool");
        eventExecutor = ExecutorServiceHelpers.newScheduledThreadPool(serviceConfig.getThreadPoolSize(), "eventprocessor");
        retentionExecutor = ExecutorServiceHelpers.newScheduledThreadPool(Config.RETENTION_THREAD_POOL_SIZE, "retentionpool");
        watermarkingExecutor = ExecutorServiceHelpers.newScheduledThreadPool(Config.WATERMARKING_THREAD_POOL_SIZE, "watermarkingpool");
        bucketStore = StreamStoreFactory.createBucketStore(storeClient, controllerExecutor);
        log.info("Created the bucket store.");
        taskMetadataStore = TaskStoreFactory.createStore(storeClient, controllerExecutor);
        log.info("Created the task store.");
        hostStore = HostStoreFactory.createStore(serviceConfig.getHostMonitorConfig(), storeClient);
        log.info("Created the host store.");
        checkpointStore = CheckpointStoreFactory.create(storeClient);
        log.info("Created the checkpoint store.");
        // Initialize Stream and Transaction metrics.
        StreamMetrics.initialize();
        TransactionMetrics.initialize();
        // On each controller process restart, we use a fresh hostId,
        // which is a combination of hostname and random GUID.
        String hostName = getHostName();
        Host host = new Host(hostName, getPort(), UUID.randomUUID().toString());
        // Create a RequestTracker instance to trace client requests end-to-end.
        GRPCServerConfig grpcServerConfig = serviceConfig.getGRPCServerConfig().get();
        RequestTracker requestTracker = new RequestTracker(grpcServerConfig.isRequestTracingEnabled());
        // Create a Health Service Manager instance.
        healthServiceManager = new HealthServiceManager(serviceConfig.getHealthCheckFrequency());
        if (serviceConfig.getHostMonitorConfig().isHostMonitorEnabled()) {
            // Start the Segment Container Monitor.
            monitor = new SegmentContainerMonitor(hostStore, (CuratorFramework) storeClient.getClient(), new UniformContainerBalancer(), serviceConfig.getHostMonitorConfig().getHostMonitorMinRebalanceInterval());
            monitor.startAsync();
            log.info("Started Segment Container Monitor service.");
            SegmentContainerMonitorHealthContributor segmentContainerMonitorHC = new SegmentContainerMonitorHealthContributor("segmentContainerMonitor", monitor);
            healthServiceManager.register(segmentContainerMonitorHC);
        }
        // This client config is used by the segment store helper (SegmentHelper) to connect to the segment store.
        ClientConfig.ClientConfigBuilder clientConfigBuilder = ClientConfig.builder().controllerURI(URI.create((grpcServerConfig.isTlsEnabled() ? "tls://" : "tcp://") + "localhost:" + grpcServerConfig.getPort())).trustStore(grpcServerConfig.getTlsTrustStore()).validateHostName(false);
        Optional<Boolean> tlsEnabledForSegmentStore = BooleanUtils.extract(serviceConfig.getTlsEnabledForSegmentStore());
        if (tlsEnabledForSegmentStore.isPresent()) {
            clientConfigBuilder.enableTlsToSegmentStore(tlsEnabledForSegmentStore.get());
        }
        // Use one connection per Segment Store to save up resources.
        ClientConfig clientConfig = clientConfigBuilder.maxConnectionsPerSegmentStore(1).build();
        connectionFactory = connectionFactoryRef.orElseGet(() -> new SocketConnectionFactoryImpl(clientConfig));
        connectionPool = new ConnectionPoolImpl(clientConfig, connectionFactory);
        segmentHelper = segmentHelperRef.orElseGet(() -> new SegmentHelper(connectionPool, hostStore, controllerExecutor));
        GrpcAuthHelper authHelper = new GrpcAuthHelper(serviceConfig.getGRPCServerConfig().get().isAuthorizationEnabled(), grpcServerConfig.getTokenSigningKey(), grpcServerConfig.getAccessTokenTTLInSeconds());
        streamStore = streamMetadataStoreRef.orElseGet(() -> StreamStoreFactory.createStore(storeClient, segmentHelper, authHelper, controllerExecutor));
        log.info("Created the stream store.");
        streamMetadataTasks = new StreamMetadataTasks(streamStore, bucketStore, taskMetadataStore, segmentHelper, controllerExecutor, eventExecutor, host.getHostId(), authHelper, serviceConfig.getRetentionFrequency().toMillis());
        streamTransactionMetadataTasks = new StreamTransactionMetadataTasks(streamStore, segmentHelper, controllerExecutor, eventExecutor, host.getHostId(), serviceConfig.getTimeoutServiceConfig(), authHelper);
        BucketServiceFactory bucketServiceFactory = new BucketServiceFactory(host.getHostId(), bucketStore, 1000);
        Duration executionDurationRetention = serviceConfig.getRetentionFrequency();
        PeriodicRetention retentionWork = new PeriodicRetention(streamStore, streamMetadataTasks, retentionExecutor, requestTracker);
        retentionService = bucketServiceFactory.createRetentionService(executionDurationRetention, retentionWork::retention, retentionExecutor);
        retentionService.startAsync();
        retentionService.awaitRunning();
        log.info("Started background periodic service for Retention.");
        RetentionServiceHealthContributor retentionServiceHC = new RetentionServiceHealthContributor("retentionService", retentionService);
        healthServiceManager.register(retentionServiceHC);
        Duration executionDurationWatermarking = Duration.ofSeconds(Config.MINIMUM_WATERMARKING_FREQUENCY_IN_SECONDS);
        watermarkingWork = new PeriodicWatermarking(streamStore, bucketStore, clientConfig, watermarkingExecutor, requestTracker);
        watermarkingService = bucketServiceFactory.createWatermarkingService(executionDurationWatermarking, watermarkingWork::watermark, watermarkingExecutor);
        watermarkingService.startAsync();
        watermarkingService.awaitRunning();
        log.info("Started background periodic service for Watermarking.");
        WatermarkingServiceHealthContributor watermarkingServiceHC = new WatermarkingServiceHealthContributor("watermarkingService", watermarkingService);
        healthServiceManager.register(watermarkingServiceHC);
        // Controller has a mechanism to track the currently active controller host instances. On detecting a failure of
        // any controller instance, the failure detector stores the failed HostId in a failed hosts directory (FH), and
        // invokes the taskSweeper.sweepOrphanedTasks for each failed host. When all resources under the failed hostId
        // are processed and deleted, that failed HostId is removed from FH folder.
        // Moreover, on controller process startup, it detects any hostIds not in the currently active set of
        // controllers and starts sweeping tasks orphaned by those hostIds.
        TaskSweeper taskSweeper = new TaskSweeper(taskMetadataStore, host.getHostId(), controllerExecutor, streamMetadataTasks);
        TxnSweeper txnSweeper = new TxnSweeper(streamStore, streamTransactionMetadataTasks, serviceConfig.getTimeoutServiceConfig().getMaxLeaseValue(), controllerExecutor);
        RequestSweeper requestSweeper = new RequestSweeper(streamStore, controllerExecutor, streamMetadataTasks);
        if (serviceConfig.isControllerClusterListenerEnabled()) {
            cluster = new ClusterZKImpl((CuratorFramework) storeClient.getClient(), ClusterType.CONTROLLER);
        }
        kvtMetadataStore = kvtMetaStoreRef.orElseGet(() -> KVTableStoreFactory.createStore(storeClient, segmentHelper, authHelper, controllerExecutor, streamStore));
        kvtMetadataTasks = new TableMetadataTasks(kvtMetadataStore, segmentHelper, controllerExecutor, eventExecutor, host.getHostId(), authHelper);
        controllerService = new ControllerService(kvtMetadataStore, kvtMetadataTasks, streamStore, bucketStore, streamMetadataTasks, streamTransactionMetadataTasks, segmentHelper, controllerExecutor, cluster, requestTracker);
        // Setup event processors.
        setController(new LocalController(controllerService, grpcServerConfig.isAuthorizationEnabled(), grpcServerConfig.getTokenSigningKey()));
        CompletableFuture<Void> eventProcessorFuture = CompletableFuture.completedFuture(null);
        if (serviceConfig.getEventProcessorConfig().isPresent()) {
            // Create ControllerEventProcessor object.
            controllerEventProcessors = new ControllerEventProcessors(host.getHostId(), serviceConfig.getEventProcessorConfig().get(), localController, checkpointStore, streamStore, bucketStore, connectionPool, streamMetadataTasks, streamTransactionMetadataTasks, kvtMetadataStore, kvtMetadataTasks, eventExecutor);
            // Bootstrap and start it asynchronously.
            eventProcessorFuture = controllerEventProcessors.bootstrap(streamTransactionMetadataTasks, streamMetadataTasks, kvtMetadataTasks).thenAcceptAsync(x -> controllerEventProcessors.startAsync(), eventExecutor);
            EventProcessorHealthContributor eventProcessorHC = new EventProcessorHealthContributor("eventProcessor", controllerEventProcessors);
            healthServiceManager.register(eventProcessorHC);
        }
        // Setup and start controller cluster listener after all sweepers have been initialized.
        if (serviceConfig.isControllerClusterListenerEnabled()) {
            List<FailoverSweeper> failoverSweepers = new ArrayList<>();
            failoverSweepers.add(taskSweeper);
            failoverSweepers.add(txnSweeper);
            failoverSweepers.add(requestSweeper);
            if (serviceConfig.getEventProcessorConfig().isPresent()) {
                assert controllerEventProcessors != null;
                failoverSweepers.add(controllerEventProcessors);
            }
            controllerClusterListener = new ControllerClusterListener(host, cluster, controllerExecutor, failoverSweepers);
            controllerClusterListener.startAsync();
            ClusterListenerHealthContributor clusterListenerHC = new ClusterListenerHealthContributor("clusterListener", controllerClusterListener);
            healthServiceManager.register(clusterListenerHC);
        }
        // Start the Health Service.
        healthServiceManager.start();
        // Start RPC server.
        if (serviceConfig.getGRPCServerConfig().isPresent()) {
            grpcServer = new GRPCServer(controllerService, grpcServerConfig, requestTracker);
            grpcServer.startAsync();
            grpcServer.awaitRunning();
            GRPCServerHealthContributor grpcServerHC = new GRPCServerHealthContributor("GRPCServer", grpcServer);
            healthServiceManager.register(grpcServerHC);
        }
        // Start REST server.
        if (serviceConfig.getRestServerConfig().isPresent()) {
            List<Object> resources = new ArrayList<>();
            resources.add(new StreamMetadataResourceImpl(this.localController, controllerService, grpcServer.getAuthHandlerManager(), connectionFactory, clientConfig));
            resources.add(new HealthImpl(grpcServer.getAuthHandlerManager(), healthServiceManager.getEndpoint()));
            resources.add(new PingImpl());
            MetricsProvider.getMetricsProvider().prometheusResource().ifPresent(resources::add);
            restServer = new RESTServer(serviceConfig.getRestServerConfig().get(), Set.copyOf(resources));
            restServer.startAsync();
            restServer.awaitRunning();
        }
        // Wait for controller event processors to start.
        if (serviceConfig.getEventProcessorConfig().isPresent()) {
            // if store client has failed because of session expiration, there are two possibilities where
            // controllerEventProcessors.awaitRunning may be stuck forever -
            // 1. stream creation is retried indefinitely and cannot complete because of zk session expiration
            // 2. event writer after stream creation throws exception.
            // In both of above cases controllerEventProcessors.startAsync may not get called.
            CompletableFuture.anyOf(storeClientFailureFuture, eventProcessorFuture.thenAccept(x -> controllerEventProcessors.awaitRunning())).join();
        }
        // Wait for controller cluster listeners to start.
        if (serviceConfig.isControllerClusterListenerEnabled()) {
            controllerClusterListener.awaitRunning();
        }
    } catch (Exception e) {
        log.error("Failed trying to start controller services", e);
        throw e;
    } finally {
        LoggerHelpers.traceLeave(log, this.objectId, "startUp", traceId);
    }
}

Example 3 with Host

use of io.pravega.common.cluster.Host in project pravega by pravega.

the class ClusterZKTest method deregisterNode.

@Test(timeout = TEST_TIMEOUT)
public void deregisterNode() throws Exception {
    LinkedBlockingQueue<String> nodeAddedQueue = new LinkedBlockingQueue<>();
    LinkedBlockingQueue<String> nodeRemovedQueue = new LinkedBlockingQueue<>();
    LinkedBlockingQueue<Exception> exceptionsQueue = new LinkedBlockingQueue<>();
    @Cleanup CuratorFramework client2 = CuratorFrameworkFactory.builder().connectString(zkUrl).retryPolicy(new ExponentialBackoffRetry(RETRY_SLEEP_MS, MAX_RETRY)).namespace(CLUSTER_NAME_2).build();
    @Cleanup Cluster clusterListener = new ClusterZKImpl(client2, ClusterType.HOST);
    clusterListener.addListener((eventType, host) -> {
        switch(eventType) {
            case HOST_ADDED:
                nodeAddedQueue.offer(host.getIpAddr());
                break;
            case HOST_REMOVED:
                nodeRemovedQueue.offer(host.getIpAddr());
                break;
            case ERROR:
                exceptionsQueue.offer(new RuntimeException("Encountered error"));
                break;
            default:
                exceptionsQueue.offer(new RuntimeException("Unhandled case"));
                break;
        }
    });
    @Cleanup CuratorFramework client = CuratorFrameworkFactory.builder().connectString(zkUrl).retryPolicy(new ExponentialBackoffRetry(RETRY_SLEEP_MS, MAX_RETRY)).namespace(CLUSTER_NAME_2).build();
    // Create Add a node to the cluster.
    @Cleanup Cluster clusterZKInstance1 = new ClusterZKImpl(client, ClusterType.HOST);
    clusterZKInstance1.registerHost(new Host(HOST_1, PORT, null));
    assertEquals(HOST_1, nodeAddedQueue.poll(5, TimeUnit.SECONDS));
    clusterZKInstance1.deregisterHost(new Host(HOST_1, PORT, null));
    assertEquals(HOST_1, nodeRemovedQueue.poll(5, TimeUnit.SECONDS));
    Exception exception = exceptionsQueue.poll();
    if (exception != null) {
        throw exception;
    }
}

Example 4 with Host

use of io.pravega.common.cluster.Host in project pravega by pravega.

the class SegmentContainerMonitorTest method testMonitor.

private void testMonitor(HostControllerStore hostStore, List<CompletableFuture<Void>> latches) throws Exception {
    // To coordinate the test cases.
    Semaphore sync = new Semaphore(0);
    // Decorating hostStore to add the coordination logic using semaphore.
    class MockHostControllerStore implements HostControllerStore {

        @Override
        public Map<Host, Set<Integer>> getHostContainersMap() {
            return hostStore.getHostContainersMap();
        }

        @Override
        public void updateHostContainersMap(Map<Host, Set<Integer>> newMapping) {
            hostStore.updateHostContainersMap(newMapping);
            // Notify the test case of the update.
            sync.release();
        }

        @Override
        public int getContainerCount() {
            return hostStore.getContainerCount();
        }

        @Override
        public Host getHostForSegment(String scope, String stream, long segmentNumber) {
            return null;
        }

        @Override
        public Host getHostForTableSegment(String table) {
            return null;
        }
    }
    SegmentContainerMonitor monitor = new SegmentContainerMonitor(new MockHostControllerStore(), PRAVEGA_ZK_CURATOR_RESOURCE.client, new UniformContainerBalancer(), 2);
    monitor.startAsync().awaitRunning();
    assertEquals(hostStore.getContainerCount(), Config.HOST_STORE_CONTAINER_COUNT);
    // Rebalance should be triggered for the very first attempt. Verify that no hosts are added to the store.
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    if (latches != null) {
        latches.get(1).join();
    }
    assertEquals(0, hostStore.getHostContainersMap().size());
    // New host added.
    cluster.registerHost(new Host("localhost1", 1, null));
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    if (latches != null) {
        latches.get(2).join();
    }
    assertEquals(1, hostStore.getHostContainersMap().size());
    // Multiple hosts added and removed.
    cluster.registerHost(new Host("localhost2", 2, null));
    cluster.registerHost(new Host("localhost3", 3, null));
    cluster.registerHost(new Host("localhost4", 4, null));
    cluster.deregisterHost(new Host("localhost1", 1, null));
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    if (latches != null) {
        latches.get(3).join();
    }
    assertEquals(3, hostStore.getHostContainersMap().size());
    // Add a host.
    cluster.registerHost(new Host("localhost1", 1, null));
    // Rebalance should not have been triggered since the min rebalance interval is not yet elapsed.
    assertEquals(3, hostStore.getHostContainersMap().size());
    // Wait for rebalance and verify the host update.
    assertTrue(sync.tryAcquire(10, TimeUnit.SECONDS));
    if (latches != null) {
        latches.get(4).join();
    }
    assertEquals(4, hostStore.getHostContainersMap().size());
    monitor.shutDown();
}

Example 5 with Host

use of io.pravega.common.cluster.Host in project pravega by pravega.

the class UniformContainerBalancerTest method testRebalancer.

@Test(timeout = 5000)
public void testRebalancer() {
    UniformContainerBalancer balancer = new UniformContainerBalancer();
    // Validate empty host.
    HashSet<Host> hosts = new HashSet<>();
    Map<Host, Set<Integer>> rebalance = balancer.rebalance(new HashMap<>(), hosts);
    assertEquals(0, rebalance.size());
    // Validate initialization.
    hosts.add(new Host("host1", 123, null));
    rebalance = balancer.rebalance(new HashMap<>(), hosts);
    assertEquals(1, rebalance.size());
    validateContainerCount(rebalance, hosts);
    // New host added.
    hosts.add(new Host("host2", 123, null));
    rebalance = balancer.rebalance(rebalance, hosts);
    assertEquals(2, rebalance.size());
    validateContainerCount(rebalance, hosts);
    // Add multiple hosts.
    hosts.add(new Host("host3", 123, null));
    hosts.add(new Host("host4", 123, null));
    rebalance = balancer.rebalance(rebalance, hosts);
    assertEquals(4, rebalance.size());
    validateContainerCount(rebalance, hosts);
    // Remove host.
    hosts.remove(new Host("host2", 123, null));
    rebalance = balancer.rebalance(rebalance, hosts);
    assertEquals(3, rebalance.size());
    validateContainerCount(rebalance, hosts);
    // Add and remove multiple hosts.
    hosts.add(new Host("host2", 123, null));
    hosts.add(new Host("host5", 123, null));
    hosts.add(new Host("host6", 123, null));
    hosts.add(new Host("host7", 123, null));
    hosts.add(new Host("host8", 123, null));
    hosts.add(new Host("host9", 123, null));
    hosts.remove(new Host("host1", 123, null));
    hosts.remove(new Host("host3", 123, null));
    hosts.remove(new Host("host4", 123, null));
    rebalance = balancer.rebalance(rebalance, hosts);
    assertEquals(6, rebalance.size());
    validateContainerCount(rebalance, hosts);
    // Remove multiple hosts.
    hosts.remove(new Host("host2", 123, null));
    hosts.remove(new Host("host5", 123, null));
    hosts.remove(new Host("host6", 123, null));
    rebalance = balancer.rebalance(rebalance, hosts);
    assertEquals(3, rebalance.size());
    validateContainerCount(rebalance, hosts);
    // No changes.
    rebalance = balancer.rebalance(rebalance, hosts);
    assertEquals(3, rebalance.size());
    validateContainerCount(rebalance, hosts);
}