87.Oozie API接口向CDH集群提交Java作业

• CM和CDH版本：5.13.1
• 集群未启用Kerberos

1.环境准备

• 作业运行的jar包上传到HDFS目录

sudo -u faysontest hadoop fs -mkdir -p /faysontest/jars
sudo -u faysontest hadoop fs -put /opt/cloudera/parcels/CDH/jars/hadoop-mapreduce-examples-2.6.0-cdh5.13.1.jar /faysontest/jars
sudo -u faysontest hadoop fs -ls /faysontest/jars

• Java Action的workflow.xml文件：
  • workflow.xml文件中使用的参数配置为动态参数

    
    
        Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]
    
    
        
            ${jobTracker}
            ${nameNode}
            ${mainClass}
            ${javaOpts}
            ${arg1}
            ${arg2}
        
        
        
    
    

• 将定义好的workflow.xml文件上传至HDFS的/user/faysontest/oozie/javaaction目录

[root@ip-186-31-6-148 opt]# sudo -u faysontest hadoop fs -mkdir -p /user/faysontest/oozie/javaaction
[root@ip-186-31-6-148 opt]# sudo -u faysontest hadoop fs -put /opt/workflow.xml /user/faysontest/oozie/javaaction
[root@ip-186-31-6-148 opt]# sudo -u faysontest hadoop fs -ls /user/faysontest/oozie/javaaction

2.创建Maven

• Maven创建Java工程
• pom.xml文件内容

    
        cdh-project
        com.cloudera
        1.0-SNAPSHOT
    
    4.0.0
    oozie-demo
    jar
    oozie-demo
    http://maven.apache.org
    
        UTF-8
    
    
        
            org.apache.httpcomponents
            httpclient
            4.5.4
        
        
            net.sourceforge.spnego
            spnego
            7.0
        
        
            org.apache.oozie
            oozie-client
            4.1.0
        
    

3.编写Oozie

• 编写JavaWorkflowDemo.java，如下

package com.cloudera.nokerberos;
import org.apache.oozie.client.OozieClient;
import org.apache.oozie.client.WorkflowAction;
import org.apache.oozie.client.WorkflowJob;
import java.util.List;
import java.util.Properties;

public class JavaWorkflowDemo {
    private static String oozieURL = "http://ip-186-31-6-148.fayson.com:11000/oozie";
    public static void main(String[] args) {
        System.setProperty("user.name", "faysontest");
        OozieClient oozieClient = new OozieClient(oozieURL);
        try {
            System.out.println(oozieClient.getServerBuildVersion());
            Properties properties = oozieClient.createConfiguration();
            properties.put("oozie.wf.application.path", "${nameNode}/user/faysontest/oozie/javaaction");
            properties.put("oozie.use.system.libpath", "True");
            properties.put("nameNode", "hdfs://ip-186-31-10-118.fayson.com:8020");
            properties.put("jobTracker", "ip-186-31-6-148.fayson.com:8032");
            properties.put("mainClass", "org.apache.hadoop.examples.QuasiMonteCarlo");
            properties.put("arg1", "10");
            properties.put("arg2", "10");
            properties.put("javaOpts", "-Xmx1000m");
            properties.put("oozie.libpath", "${nameNode}/faysontest/jars/");
            //运行workflow
            String jobid = oozieClient.run(properties);
            System.out.println(jobid);
            //等待10s
            new Thread(){
                public void run() {
                    try {
                        Thread.sleep(10000l);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }.start();
            //根据workflow id获取作业运行情况
            WorkflowJob workflowJob = oozieClient.getJobInfo(jobid);
            //获取作业日志
            System.out.println(oozieClient.getJobLog(jobid));
            //获取workflow中所有ACTION
            List list = workflowJob.getActions();
            for (WorkflowAction action : list) {
                //输出每个Action的 Appid 即Yarn的Application ID
                System.out.println(action.getExternalId());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

总结

• 需要先定义好workflow.xml文件
• 参数传递通过在代码里面调用oozieClient.createConfiguration()创建一个Properties对象将K，V值存储并传入oozieClient.run(properties)中
• 在指定HDFS上运行的jar或workflow的路径时需要带上HDFS的路径，否则默认会找到本地的目录

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