xintongsong commented on a change in pull request #13186: URL: https://github.com/apache/flink/pull/13186#discussion_r476996403
########## File path: flink-kubernetes/src/main/java/org/apache/flink/kubernetes/KubernetesResourceManagerDriver.java ########## @@ -0,0 +1,301 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.flink.kubernetes; + +import org.apache.flink.configuration.Configuration; +import org.apache.flink.configuration.GlobalConfiguration; +import org.apache.flink.configuration.TaskManagerOptions; +import org.apache.flink.kubernetes.configuration.KubernetesConfigOptions; +import org.apache.flink.kubernetes.configuration.KubernetesResourceManagerConfiguration; +import org.apache.flink.kubernetes.kubeclient.FlinkKubeClient; +import org.apache.flink.kubernetes.kubeclient.factory.KubernetesTaskManagerFactory; +import org.apache.flink.kubernetes.kubeclient.parameters.KubernetesTaskManagerParameters; +import org.apache.flink.kubernetes.kubeclient.resources.KubernetesPod; +import org.apache.flink.kubernetes.kubeclient.resources.KubernetesWatch; +import org.apache.flink.kubernetes.utils.KubernetesUtils; +import org.apache.flink.runtime.clusterframework.ApplicationStatus; +import org.apache.flink.runtime.clusterframework.BootstrapTools; +import org.apache.flink.runtime.clusterframework.ContaineredTaskManagerParameters; +import org.apache.flink.runtime.clusterframework.TaskExecutorProcessSpec; +import org.apache.flink.runtime.clusterframework.types.ResourceID; +import org.apache.flink.runtime.concurrent.FutureUtils; +import org.apache.flink.runtime.externalresource.ExternalResourceUtils; +import org.apache.flink.runtime.resourcemanager.active.AbstractResourceManagerDriver; +import org.apache.flink.runtime.resourcemanager.active.ResourceManagerDriver; +import org.apache.flink.runtime.resourcemanager.exceptions.ResourceManagerException; +import org.apache.flink.util.ExceptionUtils; +import org.apache.flink.util.FlinkException; +import org.apache.flink.util.Preconditions; + +import javax.annotation.Nullable; + +import java.util.ArrayList; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.CompletableFuture; + +/** + * Implementation of {@link ResourceManagerDriver} for Kubernetes deployment. + */ +public class KubernetesResourceManagerDriver extends AbstractResourceManagerDriver<KubernetesWorkerNode> + implements FlinkKubeClient.PodCallbackHandler { + + /** The taskmanager pod name pattern is {clusterId}-{taskmanager}-{attemptId}-{podIndex}. */ + private static final String TASK_MANAGER_POD_FORMAT = "%s-taskmanager-%d-%d"; + + private final String clusterId; + + private final FlinkKubeClient kubeClient; + + /** Request resource futures, keyed by pod names. */ + private final Map<String, CompletableFuture<KubernetesWorkerNode>> requestResourceFutures; + + /** When ResourceManager failover, the max attempt should recover. */ + private long currentMaxAttemptId = 0; + + /** Current max pod index. When creating a new pod, it should increase one. */ + private long currentMaxPodId = 0; + + private KubernetesWatch podsWatch; + + public KubernetesResourceManagerDriver( + Configuration flinkConfig, + FlinkKubeClient kubeClient, + KubernetesResourceManagerConfiguration configuration) { + super(flinkConfig, GlobalConfiguration.loadConfiguration()); + + this.clusterId = Preconditions.checkNotNull(configuration.getClusterId()); + this.kubeClient = Preconditions.checkNotNull(kubeClient); + this.requestResourceFutures = new HashMap<>(); + } + + // ------------------------------------------------------------------------ + // ResourceManagerDriver + // ------------------------------------------------------------------------ + + @Override + protected void initializeInternal() throws Exception { + recoverWorkerNodesFromPreviousAttempts(); + + podsWatch = kubeClient.watchPodsAndDoCallback( + KubernetesUtils.getTaskManagerLabels(clusterId), + this); + } + + @Override + public CompletableFuture<Void> terminate() { + // shut down all components + Exception exception = null; + + try { + podsWatch.close(); + } catch (Exception e) { + exception = e; + } + + try { + kubeClient.close(); + } catch (Exception e) { + exception = ExceptionUtils.firstOrSuppressed(e, exception); + } + + return exception == null ? + FutureUtils.completedVoidFuture() : + FutureUtils.completedExceptionally(exception); + } + + @Override + public void deregisterApplication(ApplicationStatus finalStatus, @Nullable String optionalDiagnostics) { + log.info("Deregistering flink kubernetes cluster, clusterId: {}, diagnostics: {}", + clusterId, + optionalDiagnostics == null ? "" : optionalDiagnostics); + kubeClient.stopAndCleanupCluster(clusterId); + } + + @Override + public CompletableFuture<KubernetesWorkerNode> requestResource(TaskExecutorProcessSpec taskExecutorProcessSpec) { + final KubernetesTaskManagerParameters parameters = + createKubernetesTaskManagerParameters(taskExecutorProcessSpec); + final KubernetesPod taskManagerPod = + KubernetesTaskManagerFactory.buildTaskManagerKubernetesPod(parameters); + final String podName = taskManagerPod.getName(); + final CompletableFuture<KubernetesWorkerNode> requestResourceFuture = new CompletableFuture<>(); + + requestResourceFutures.put(podName, requestResourceFuture); + + log.info("Creating new TaskManager pod with name {} and resource <{},{}>.", + podName, + parameters.getTaskManagerMemoryMB(), + parameters.getTaskManagerCPU()); + + // TODO: enable pod creation interval + // When K8s API Server is temporary unavailable, `kubeClient.createTaskManagerPod` might fail immediately. + // In case of pod creation failures, we should wait for an interval before trying to create new pods. + // Otherwise, ActiveResourceManager will always re-requesting the worker, which keeps the main thread busy. + + FutureUtils.assertNoException( + kubeClient.createTaskManagerPod(taskManagerPod) + .handleAsync((ignore, exception) -> { + if (exception != null) { + log.warn("Could not create pod {}, exception: {}", podName, exception); + CompletableFuture<KubernetesWorkerNode> future = + requestResourceFutures.remove(taskManagerPod.getName()); + if (future != null) { + future.completeExceptionally(exception); + } + } else { + log.info("Pod {} is created.", podName); + } + return null; + }, getMainThreadExecutor())); + return requestResourceFuture; + } + + @Override + public void releaseResource(KubernetesWorkerNode worker) { + final String podName = worker.getResourceID().toString(); + + log.info("Stopping TaskManager pod {}.", podName); + + removePod(podName); + } + + // ------------------------------------------------------------------------ + // FlinkKubeClient.PodCallbackHandler + // ------------------------------------------------------------------------ + + @Override + public void onAdded(List<KubernetesPod> pods) { + getMainThreadExecutor().execute(() -> { + for (KubernetesPod pod : pods) { + final String podName = pod.getName(); + final CompletableFuture<KubernetesWorkerNode> requestResourceFuture = requestResourceFutures.remove(podName); + + if (requestResourceFuture == null) { + log.debug("Ignore TaskManager pod that is already added: {}", podName); + continue; + } + + log.info("Received new TaskManager pod: {}", podName); + requestResourceFuture.complete(new KubernetesWorkerNode(new ResourceID(podName))); + } + }); + } + + @Override + public void onModified(List<KubernetesPod> pods) { + terminatedPodsInMainThread(pods); + } + + @Override + public void onDeleted(List<KubernetesPod> pods) { + terminatedPodsInMainThread(pods); + } + + @Override + public void onError(List<KubernetesPod> pods) { + terminatedPodsInMainThread(pods); + } + + @Override + public void handleFatalError(Throwable throwable) { + getMainThreadExecutor().execute(() -> getResourceEventHandler().onError(throwable)); + } + + // ------------------------------------------------------------------------ + // Internal + // ------------------------------------------------------------------------ + + private void recoverWorkerNodesFromPreviousAttempts() throws ResourceManagerException { + final List<KubernetesPod> podList = kubeClient.getPodsWithLabels(KubernetesUtils.getTaskManagerLabels(clusterId)); + final List<KubernetesWorkerNode> recoveredWorkers = new ArrayList<>(); + + for (KubernetesPod pod : podList) { + final KubernetesWorkerNode worker = new KubernetesWorkerNode(new ResourceID(pod.getName())); + recoveredWorkers.add(worker); + final long attempt = worker.getAttempt(); + if (attempt > currentMaxAttemptId) { + currentMaxAttemptId = attempt; + } + } + + log.info("Recovered {} pods from previous attempts, current attempt id is {}.", + recoveredWorkers.size(), + ++currentMaxAttemptId); + + // Should not invoke resource event handler on the main thread executor. + // We are in the initializing thread. The main thread executor is not yet ready. + getResourceEventHandler().onPreviousAttemptWorkersRecovered(recoveredWorkers); + } + + private KubernetesTaskManagerParameters createKubernetesTaskManagerParameters(TaskExecutorProcessSpec taskExecutorProcessSpec) { + final String podName = String.format( + TASK_MANAGER_POD_FORMAT, + clusterId, + currentMaxAttemptId, + ++currentMaxPodId); + + final ContaineredTaskManagerParameters taskManagerParameters = + ContaineredTaskManagerParameters.create(flinkConfig, taskExecutorProcessSpec); + + final Configuration taskManagerConfig = new Configuration(flinkConfig); + taskManagerConfig.set(TaskManagerOptions.TASK_MANAGER_RESOURCE_ID, podName); + + final String dynamicProperties = + BootstrapTools.getDynamicPropertiesAsString(flinkClientConfig, taskManagerConfig); Review comment: It compares `taskManagerConfig` with `flinkClientConfig` (the original version shipped from client), and send only the differences. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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