Flink-Application模式提交任务到Yarn集群，包括jar包提交方法和javaApi提交方法

╰+攻爆jí腚メ 2022-09-14 01:47 327阅读 0赞

#### Flink Application ####

对于per job模式，jar包的解析、生成JobGraph是在客户端上执行的，然后将生成的jobgraph提交到集群。如果任务特别多的话，那么这些生成JobGraph、提交到集群的操作都会在实时平台所在的机器上执行，那么将会给服务器造成很大的压力。

此外这种模式提交任务的时候会把本地flink的所有jar包先上传到hdfs上相应 的临时目录，这个也会带来大量的网络的开销，所以如果任务特别多的情况下，平台的吞吐量将会直线下降。

所以针对flink per job模式的一些问题，flink 引入了一个新的部署模式–Application模式。 目前 Application 模式支持 Yarn 和 K8s 的部署方式，Yarn Application 模式会在客户端将运行任务需要的依赖都上传到 Flink Master，然后在 Master 端进行任务的提交。

此外，还支持远程的用户jar包来提交任务，比如可以将jar放到hdfs上，进一步减少上传jar所需的时间，从而减少部署作业的时间。

提交方法如下：

**jar包提交**

那么可以将以上代码打成jar包，然后提交运行的方式进行处理。

bin/flink run -yd -m yarn-cluster -c com.starnet.server.bigdata.flink.WordCount /home/bd/FLINK/FlinkTest-1.0-SNAPSHOT-jar-with-dependencies.jar
    
    /opt/module/flink-1.11.4/bin/flink run -yd -m yarn-cluster -c com.starnet.server.bigdata.flink.WordCount -yD yarn.provided.lib.dirs="hdfs://hadoop113:8020/jar/flink11/libs" /home/bd/FLINK/Flink1.11-1.0-SNAPSHOT-jar-with-dependencies.jar

通过jar提交成功之后，控制台输出如下：

2021-09-26 18:00:54,129 INFO  org.apache.flink.yarn.YarnClusterDescriptor                  [] - YARN application has been deployed successfully.
    2021-09-26 18:00:54,529 INFO  org.apache.flink.yarn.YarnClusterDescriptor                  [] - Found Web Interface hadoop115:35553 of application 'application_1631184398602_0055'.

优雅退出和web访问均与以上相同。

**java-api方式提交**

提交相关代码如下：

public void crateStreamTaskByFlinkClient() { 
    
        //flink的本地配置目录，为了得到flink的配置
        // 如果出现org.apache.flink.streaming.runtime.tasks.StreamTaskException: Cannot instantiate user function.错误
        // 则在flink-config.yaml加入
        // classloader.resolve-order: parent-first
        String configurationDirectory = "/opt/module/flink-1.11.4/conf";
        // String configurationDirectory = "/home/lxj/workspace/Olt-Test/bigdata/bigdataserver/src/main/resources/flink/conf";
    
        //存放flink集群相关的jar包目录
        String flinkLibs = "hdfs://hadoop113:8020/jar/flink11/libs";
        //用户jar
        String userJarPath = "hdfs://hadoop113:8020/jar/userTask/Flink1.11-1.0-SNAPSHOT-jar-with-dependencies.jar";
        String flinkDistJar = "hdfs://hadoop113:8020/jar/flink11/libs/flink-dist_2.12-1.11.4.jar";
    
        YarnClient yarnClient = YarnClient.createYarnClient();
        YarnConfiguration yarnConfiguration = new YarnConfiguration();
        yarnClient.init(yarnConfiguration);
        yarnClient.start();
    
        // 设置日志的，没有的话看不到日志
        YarnClusterInformationRetriever clusterInformationRetriever = YarnClientYarnClusterInformationRetriever
            .create(yarnClient);
    
        //获取flink的配置
        Configuration flinkConfiguration = GlobalConfiguration.loadConfiguration(
            configurationDirectory);
    
        flinkConfiguration.set(CheckpointingOptions.INCREMENTAL_CHECKPOINTS, true);
    
        flinkConfiguration.set(
            PipelineOptions.JARS,
            Collections.singletonList(userJarPath));
    
        Path remoteLib = new Path(flinkLibs);
        flinkConfiguration.set(
            YarnConfigOptions.PROVIDED_LIB_DIRS,
            Collections.singletonList(remoteLib.toString()));
    
        flinkConfiguration.set(
            YarnConfigOptions.FLINK_DIST_JAR,
            flinkDistJar);
    
        // 设置为application模式
        flinkConfiguration.set(
            DeploymentOptions.TARGET,
            YarnDeploymentTarget.APPLICATION.getName());
    
        // yarn application name
        flinkConfiguration.set(YarnConfigOptions.APPLICATION_NAME, "flink-application");
    
        YarnLogConfigUtil.setLogConfigFileInConfig(flinkConfiguration, configurationDirectory);
    
        ClusterSpecification clusterSpecification = new ClusterSpecification.ClusterSpecificationBuilder()
            .createClusterSpecification();
    
        // 设置用户jar的参数和主类
        ApplicationConfiguration appConfig = new ApplicationConfiguration(new String[] { "test"}, "com.starnet.server.bigdata.flink.WordCount");
    
        YarnClusterDescriptor yarnClusterDescriptor = new YarnClusterDescriptor(
            flinkConfiguration,
            yarnConfiguration,
            yarnClient,
            clusterInformationRetriever,
            true);
    
        try { 
            ClusterClientProvider<ApplicationId> clusterClientProvider = yarnClusterDescriptor.deployApplicationCluster(
                clusterSpecification,
                appConfig);
    
            ClusterClient<ApplicationId> clusterClient = clusterClientProvider.getClusterClient();
    
            ApplicationId applicationId = clusterClient.getClusterId();
            String webInterfaceURL = clusterClient.getWebInterfaceURL();
            log.error("applicationId is {}", applicationId);
            log.error("webInterfaceURL is {}", webInterfaceURL);
            
            // 退出
            // yarnClusterDescriptor.killCluster(applicationId);
        } catch (Exception e){ 
            log.error(e.getMessage(), e);
        }
    }

此方法可以远程提交Flink任务到yarn上运行，并且可以通过javaApi获取到提交之后的applicationId和web地址，以及任务的退出，整体可以不依赖小程序，非常的方便。