oozie编写一个小案例

Posted 2020-10-17 再也伤不起

准备工作  拷贝原来的模板 

1 mkdir oozie-apps
2 cd oozie-apps/
3 cp -r ../examples/apps/mar-reduce .
4 mv map-reduce mr-wordcount-wf   

 

 

配置文件修改

workflow.xml ：

 1 <!--
 2   Licensed to the Apache Software Foundation (ASF) under one
 3   or more contributor license agreements.  See the NOTICE file
 4   distributed with this work for additional information
 5   regarding copyright ownership.  The ASF licenses this file
 6   to you under the Apache License, Version 2.0 (the
 7   "License"); you may not use this file except in compliance
 8   with the License.  You may obtain a copy of the License at
 9   
10        http://www.apache.org/licenses/LICENSE-2.0
11   
12   Unless required by applicable law or agreed to in writing, software
13   distributed under the License is distributed on an "AS IS" BASIS,
14   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   See the License for the specific language governing permissions and
16   limitations under the License.
17 -->
18 <workflow-app xmlns="uri:oozie:workflow:0.5" name="mr-wordcount-wf">
19     <start to="mr-node-wordcount"/>
20     <action name="mr-node-wordcount">
21         <map-reduce>
22             <job-tracker>${jobTracker}</job-tracker>
23             <name-node>${nameNode}</name-node>
24             <prepare>
25                 <delete path="${nameNode}/${oozieDataRoot}/${outputDir}"/>
26             </prepare>
27             <configuration>
28                 <property>
29                     <name>mapred.mapper.new-api</name>
30                     <value>true</value>
31                 </property>
32                 <property>
33                     <name>mapred.reducer.new-api</name>
34                     <value>true</value>
35                 </property>
36                 <property>
37                     <name>mapreduce.job.queuename</name>
38                     <value>${queueName}</value>
39                 </property>
40                 <property>
41                     <name>mapreduce.job.map.class</name>
42                     <value>com.ibeifeng.hadoop.senior.mapreduce.WordCount$WordCountMapper</value>
43                 </property>
44                 <property>
45                     <name>mapreduce.job.reduce.class</name>
46                     <value>com.ibeifeng.hadoop.senior.mapreduce.WordCount$WordCountReducer</value>
47                 </property>
48                 
49                 <property>
50                     <name>mapreduce.map.output.key.class</name>
51                     <value>org.apache.hadoop.io.Text</value>
52                 </property>    
53                 <property>
54                     <name>mapreduce.map.output.value.class</name>
55                     <value>org.apache.hadoop.io.IntWritable</value>
56                 </property>    
57                 <property>
58                     <name>mapreduce.job.output.key.class</name>
59                     <value>org.apache.hadoop.io.Text</value>
60                 </property>
61                 <property>
62                     <name>mapreduce.job.output.value.class</name>
63                     <value>org.apache.hadoop.io.IntWritable</value>
64                 </property>
65                 <property>
66                     <name>mapreduce.input.fileinputformat.inputdir</name>
67                     <value>${nameNode}/${oozieDataRoot}/${inputDir}</value>
68                 </property>
69                 <property>
70                     <name>mapreduce.output.fileoutputformat.outputdir</name>
71                     <value>${nameNode}/${oozieDataRoot}/${outputDir}</value>
72                 </property>
73             </configuration>
74         </map-reduce>
75         <ok to="end"/>
76         <error to="fail"/>
77     </action>
78     <kill name="fail">
79         <message>Map/Reduce failed, error message[${wf:errorMessage(wf:lastErrorNode())}]</message>
80     </kill>
81     <end name="end"/>
82 </workflow-app>

job.properties ：

 1 #
 2 # Licensed to the Apache Software Foundation (ASF) under one
 3 # or more contributor license agreements.  See the NOTICE file
 4 # distributed with this work for additional information
 5 # regarding copyright ownership.  The ASF licenses this file
 6 # to you under the Apache License, Version 2.0 (the
 7 # "License"); you may not use this file except in compliance
 8 # with the License.  You may obtain a copy of the License at
 9 # 
10 #      http://www.apache.org/licenses/LICENSE-2.0
11 # 
12 # Unless required by applicable law or agreed to in writing, software
13 # distributed under the License is distributed on an "AS IS" BASIS,
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 # See the License for the specific language governing permissions and
16 # limitations under the License.
17 #
18 
19 nameNode=hdfs://hadoop:8020
20 jobTracker=hadoop:8032
21 queueName=default
22 oozieAppsRoot=user/root/oozie-apps
23 oozieDataRoot=user/root/oozie/datas
24 
25 oozie.wf.application.path=${nameNode}/${oozieAppsRoot}/mr-wordcount-wf/workflow.xml
26 
27 inputDir=mr-wordcount-wf/input
28 outputDir=mr-wordcount-wf/output

把自己写的MapReduce的jar 放上去

 

把改好的文件放入到hdfs

1 /opt/cdh-5.3.6/hadoop-2.5.0-cdh5.3.6/bin/hadoop dfs -put oozie-apps/ oozie-apps

 

 

 准备测试数据

 

 在hdfs创建输入目录 并把刚创建的文件上传

1 /opt/cdh-5.3.6/hadoop-2.5.0-cdh5.3.6/bin/hadoop dfs -mkdir -p oozie/datas/mr-wordcount-wf/input
3 /opt/cdh-5.3.6/hadoop-2.5.0-cdh5.3.6/bin/hadoop dfs -put test-mapred.txt oozie/datas/mr-wordcount-wf/input

 

 运行oozie

1 export OOZIE_URL=http://localhost:11000/oozie
2 bin/oozie job -config oozie-apps/mr-wordcount-wf/job.properties -run

 

 查看输出结果

原文件     统计后的文件

 

 http://blog.csdn.net/wiborgite/article/details/78585689