oozie 入门

转自:http://blackproof.iteye.com/blog/1928122

oozie概述:oozie能干什么

oozie格式:怎么用oozie

oozie执行:怎么运行oozie

oozie概述:

oozie是基于hadoop的调度器,以xml的形式写调度流程,可以调度mr,pig,hive,shell,jar等等。

主要的功能有

Workflow: 顺序执行流程节点,支持fork(分支多个节点),join(合并多个节点为一个)

Coordinator,定时触发workflow

Bundle Job,绑定多个coordinator

oozie格式:

写一个oozie,有两个是必要的:job.properties 和 workflow.xml(coordinator.xml,bundle.xml)

一、job.properties里定义环境变量

nameNode hdfs://xxx5:8020 hdfs地址
jobTracker xxx5:8034 jobTracker地址
queueName default oozie队列
examplesRoot examples 全局目录
oozie.usr.system.libpath true 是否加载用户lib库
oozie.libpath share/lib/user 用户lib库
oozie.wf.appication.path ${nameNode}/user/${user.name}/... oozie流程所在hdfs地址

注意:

workflow:oozie.wf.application.path

coordinator:oozie.coord.application.path

bundle:oozie.bundle.application.path

二、XML

1.workflow:

  1. <workflow-app xmlns="uri:oozie:workflow:0.2" name="wf-example1">
  2. <start to="pig-node">
  3. <action name="pig-node">
  4. <pig>
  5. <job-tracker>${jobTracker}</job-tracker>
  6. <name-node>${nameNode}</name-node>
  7. <prepare>
  8. <delete path="hdfs://xxx5/user/hadoop/appresult" />
  9. </prepare>
  10. <configuration>
  11. <property>
  12. <name>mapred.job.queue.name</name>
  13. <value>default</value>
  14. <property>
  15. <property>
  16. <name>mapred.compress.map.output</name>
  17. <value>true</value>
  18. <property>
  19. <property>
  20. <name>mapreduce.fileoutputcommitter.marksuccessfuljobs</name>
  21. <value>false</value>
  22. <property>
  23. </configuration>
  24. <script>test.pig</script>
  25. <param>filepath=${filpath}</param>
  26. </pig>
  27. <ok to="end">
  28. <error to="fail">
  29. </action>
  30. <kill name="fail">
  31. <message>
  32. Map/Reduce failed, error               message[${wf:errorMessage(wf:lastErrorNode())}]
  33. </message>
  34. </kill>
  35. <end name="end"/>
  36. </workflow-app>

2.coordinator

  1. <coordinator-app name="cron-coord" frequence="${coord:hours(6)}" start="${start}" end="${end}"
  2. timezoe="UTC" xmlns="uri:oozie:coordinator:0.2">
  3. <action>
  4. <workflow>
  5. <app-path>${nameNode}/user/{$coord:user()}/${examplesRoot}/wpath</app-path>
  6. <configuration>
  7. <property>
  8. <name>jobTracker</name>
  9. <value>${jobTracker}</value>
  10. </property>
  11. <property>
  12. <name>nameNode</name>
  13. <value>${nameNode}</value>
  14. </property>
  15. <property>
  16. <name>queueName</name>
  17. <value>${queueName}</value>
  18. </property>
  19. </configuration>
  20. </workflow>
  21. </action>

注意:coordinator设置的UTC,比北京时间晚8个小时,所以你要是把期望执行时间减8小时

coordinator里面传值给workflow,example,时间设置为亚洲

  1. <coordinator-app name="gwk-hour-log-coord" frequency="${coord:hours(1)}" start="${hourStart}" end="${hourEnd}" timezone="Asia/Shanghai"
  2. xmlns="uri:oozie:coordinator:0.2">
  3. <action>
  4. <workflow>
  5. <app-path>${workflowHourLogAppUri}/gwk-workflow.xml</app-path>
  6. <configuration>
  7. <property>
  8. <name>yyyymmddhh</name>
  9. <value>${coord:formatTime(coord:dateOffset(coord:nominalTime(),-1,'HOUR'), 'yyyyMMddHH')}</value>
  10. </property>
  11. </configuration>
  12. </workflow>
  13. </action>
  14. </coordinator-app>

3.bundle

  1. <bundle-app name='APPNAME' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='uri:oozie:bundle:0.1'>
  2. <controls>
  3. <kick-off-time>${kickOffTime}</kick-off-time>
  4. </controls>
  5. <coordinator name='coordJobFromBundle1' >
  6. <app-path>${appPath}</app-path>
  7. <configuration>
  8. <property>
  9. <name>startTime1</name>
  10. <value>${START_TIME}</value>
  11. </property>
  12. <property>
  13. <name>endTime1</name>
  14. <value>${END_TIME}</value>
  15. </property>
  16. </configuration>
  17. </coordinator>
  18. <coordinator name='coordJobFromBundle2' >
  19. <app-path>${appPath2}</app-path>
  20. <configuration>
  21. <property>
  22. <name>startTime2</name>
  23. <value>${START_TIME2}</value>
  24. </property>
  25. <property>
  26. <name>endTime2</name>
  27. <value>${END_TIME2}</value>
  28. </property>
  29. </configuration>
  30. </coordinator>
  31. </bundle-app>

oozie hive

  1. <action name="hive-app">
  2. <hive xmlns="uri:oozie:hive-action:0.2">
  3. <job-tracker>${jobTracker}</job-tracker>
  4. <name-node>${nameNode}</name-node>
  5. <job-xml>hive-site.xml</job-xml>
  6. <script>hivescript.q</script>
  7. <param>yyyymmdd=${yyyymmdd}</param>
  8. <param>yesterday=${yesterday}</param>
  9. <param>lastmonth=${lastmonth}</param>
  10. </hive>
  11. <ok to="result-stat-join"/>
  12. <error to="fail"/>
  13. </action>

oozie运行

启动任务:

  1. oozie job -oozie http://xxx5:11000/oozie -config job.properties -run

停止任务:

oozie job -oozie http://localhost:8080/oozie -kill 14-20090525161321-oozie-joe

注意:在停止任务的时候,有的时候会出现全线问题,需要修改oozie-site.xml文件

hadoop.proxyuser.oozie.groups *

hadoop.proxyuser.oozie.hosts *

oozie.server.ProxyUserServer.proxyuser.hadoop.hosts *

oozie.server.ProxyUserServer.proxyuser.hadoop.groups *

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