wangyang0918 commented on a change in pull request #13644: URL: https://github.com/apache/flink/pull/13644#discussion_r514067718
########## File path: flink-kubernetes/src/test/java/org/apache/flink/kubernetes/highavailability/KubernetesHighAvailabilityTestBase.java ########## @@ -0,0 +1,218 @@ +/* + * 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.highavailability; + +import org.apache.flink.configuration.Configuration; +import org.apache.flink.kubernetes.configuration.KubernetesConfigOptions; +import org.apache.flink.kubernetes.configuration.KubernetesLeaderElectionConfiguration; +import org.apache.flink.kubernetes.kubeclient.FlinkKubeClient; +import org.apache.flink.kubernetes.kubeclient.TestingFlinkKubeClient; +import org.apache.flink.kubernetes.kubeclient.resources.KubernetesConfigMap; +import org.apache.flink.kubernetes.kubeclient.resources.KubernetesException; +import org.apache.flink.runtime.concurrent.FutureUtils; +import org.apache.flink.runtime.leaderelection.DefaultLeaderElectionService; +import org.apache.flink.runtime.leaderelection.LeaderElectionDriver; +import org.apache.flink.runtime.leaderelection.TestingLeaderElectionEventHandler; +import org.apache.flink.runtime.leaderelection.TestingLeaderRetrievalEventHandler; +import org.apache.flink.runtime.leaderretrieval.DefaultLeaderRetrievalService; +import org.apache.flink.runtime.leaderretrieval.LeaderRetrievalDriver; +import org.apache.flink.runtime.util.ExecutorThreadFactory; +import org.apache.flink.util.TestLogger; +import org.apache.flink.util.function.RunnableWithException; + +import org.junit.After; +import org.junit.Before; + +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.Optional; +import java.util.UUID; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.CompletionException; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; + +import static org.hamcrest.Matchers.is; +import static org.junit.Assert.assertThat; + +/** + * Base class for high availability unit tests with a configured testing Kubernetes client. + */ +public class KubernetesHighAvailabilityTestBase extends TestLogger { + private static final String CLUSTER_ID = "leader-test-cluster"; + + public static final String LOCK_IDENTITY = UUID.randomUUID().toString(); + public static final String LEADER_URL = "akka.tcp://flink@172.20.1.21:6123/user/rpc/dispatcher"; + public static final String LEADER_CONFIGMAP_NAME = "leader-test-cluster"; + + protected static final long TIMEOUT = 30L * 1000L; + + protected ExecutorService executorService; + protected Configuration configuration; + + @Before + public void setup() { + configuration = new Configuration(); + configuration.setString(KubernetesConfigOptions.CLUSTER_ID, CLUSTER_ID); + executorService = Executors.newFixedThreadPool(4, new ExecutorThreadFactory("IO-Executor")); + } + + @After + public void teardown() throws Exception { + executorService.shutdownNow(); + executorService.awaitTermination(TIMEOUT, TimeUnit.MILLISECONDS); + } + + /** + * Context to leader election and retrieval tests. + */ + protected class Context { + /** + * The configMapStore should only be used for set the following functions. Use a ConcurrentHashMap here since it + * could be updated by {@link TestingFlinkKubeClient.MockKubernetesLeaderElector} and + * {@link KubernetesLeaderElectionDriver}. + */ + private final Map<String, KubernetesConfigMap> configMapStore = new ConcurrentHashMap<>(); + + final AtomicBoolean leaderController = new AtomicBoolean(false); + + final List<CompletableFuture<FlinkKubeClient.WatchCallbackHandler<KubernetesConfigMap>>> + configMapCallbackFutures = new ArrayList<>(); + + final CompletableFuture<Map<String, String>> deleteConfigMapByLabelsFuture = new CompletableFuture<>(); + final CompletableFuture<Void> closeKubeClientFuture = new CompletableFuture<>(); + + final FlinkKubeClient flinkKubeClient; + + final LeaderElectionDriver leaderElectionDriver; + final TestingLeaderElectionEventHandler electionEventHandler; + + final LeaderRetrievalDriver leaderRetrievalDriver; + final TestingLeaderRetrievalEventHandler retrievalEventHandler; + + Context() { + flinkKubeClient = getFlinkKubeClient(); + + electionEventHandler = new TestingLeaderElectionEventHandler(LEADER_URL); + leaderElectionDriver = createLeaderElectionDriver(); + + retrievalEventHandler = new TestingLeaderRetrievalEventHandler(); + leaderRetrievalDriver = createLeaderRetrievalDriver(); + } + + void runTestAndGrantLeadershipToContender(RunnableWithException testMethod) throws Exception { + // Grant leadership + leaderController.set(true); + electionEventHandler.waitForLeader(TIMEOUT); + assertThat(electionEventHandler.isLeader(), is(true)); + + testMethod.run(); + + leaderElectionDriver.close(); + leaderRetrievalDriver.close(); + } + + KubernetesConfigMap getLeaderConfigMap() { + final Optional<KubernetesConfigMap> configMapOpt = flinkKubeClient.getConfigMap(LEADER_CONFIGMAP_NAME); + assertThat(configMapOpt.isPresent(), is(true)); + return configMapOpt.get(); + } + + protected FlinkKubeClient getFlinkKubeClient() { + return TestingFlinkKubeClient.builder() + .setCreateConfigMapFunction(configMap -> { + configMapStore.put(configMap.getName(), configMap); + return CompletableFuture.completedFuture(null); + }) + .setGetConfigMapFunction(configMapName -> Optional.ofNullable(configMapStore.get(configMapName))) + .setCheckAndUpdateConfigMapFunction((configMapName, updateFunction) -> { + final KubernetesConfigMap configMap = configMapStore.get(configMapName); + if (configMap != null) { + try { + final boolean updated = updateFunction.apply(configMap).map( + updateConfigMap -> { + configMapStore.put(configMap.getName(), updateConfigMap); + return true; + }).orElse(false); + return CompletableFuture.completedFuture(updated); + } catch (Throwable throwable) { + throw new CompletionException(new KubernetesException("Failed to execute update fuction")); + } + } + throw new CompletionException( + new KubernetesException("ConfigMap " + configMapName + " does not exists.")); + }) + .setWatchConfigMapsFunction((ignore, handler) -> { + final CompletableFuture<FlinkKubeClient.WatchCallbackHandler<KubernetesConfigMap>> future = + new CompletableFuture<>(); + future.complete(handler); + configMapCallbackFutures.add(future); + return new TestingFlinkKubeClient.MockKubernetesWatch(); + }) + .setDeleteConfigMapFunction(name -> { + configMapStore.remove(name); + return FutureUtils.completedVoidFuture(); + }) + .setDeleteConfigMapByLabelFunction(labels -> { + deleteConfigMapByLabelsFuture.complete(labels); Review comment: It could only be called once now. I will add a check here. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
