开启日志聚合

[root@node1 hadoop]# cat mapred-site.xml 
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!--
  Licensed 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. See accompanying LICENSE file.
-->
 
<!-- Put site-specific property overrides in this file. -->
 
<configuration>
  <property>
      <name>mapreduce.framework.name</name>
      <value>yarn</value>
  </property>
  <property>
      <name>mapreduce.jobhistory.address</name>
      <value>node1:10020</value>
  </property>
  <property>
      <name>mapreduce.jobhistory.webapp.address</name>
      <value>node1:19888</value>
  </property>
  <property>
      <name>mapreduce.jobhistory.intermediate-done-dir</name>
      <value>/mr-histroty/inter</value>
  </property>
  <property>
      <name>mapreduce.jobhistory.done-dir</name>
      <value>/mr-history/done</value>
  </property>
</configuration>
[root@node1 hadoop]# cat yarn-site.xml 
<?xml version="1.0"?>
<!--
  Licensed 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. See accompanying LICENSE file.
-->
<configuration>
 
<!-- Site specific YARN configuration properties -->
  <!-- reducer获取数据的方式 -->
  <property>
  <name>yarn.nodemanager.aux-services</name>
  <value>mapreduce_shuffle</value>
  </property>
 
  <!-- 指定YARN的ResourceManager的地址 -->
  <property>
  <name>yarn.resourcemanager.hostname</name>
  <value>node1</value>
  </property>
  <property>
      <name>yarn.application.classpath</name>
      <value>
      /opt/app/hadoop-2.8.5/etc/hadoop,
      /opt/app/hadoop-2.8.5/share/hadoop/common/*,
      /opt/app/hadoop-2.8.5/share/hadoop/common/lib/*,
      /opt/app/hadoop-2.8.5/share/hadoop/hdfs/*,
      /opt/app/hadoop-2.8.5/share/hadoop/hdfs/lib/*,
      /opt/app/hadoop-2.8.5/share/hadoop/mapreduce/*,
      /opt/app/hadoop-2.8.5/share/hadoop/mapreduce/lib/*,
      /opt/app/hadoop-2.8.5/share/hadoop/yarn/*,
      /opt/app/hadoop-2.8.5/share/hadoop/yarn/lib/*
      </value>
  </property>
 
  <property>
  <name>yarn.log-aggregation-enable</name>
  <value>true</value>
  </property>
  <property>
  <name>yarn.log-aggregation.retain-seconds</name>
  <value>2592000</value>
  </property>
</configuration>
[root@node1 hadoop]# mr-jobhistory-daemon.sh start historyserver
 
一些网站的访问：
访问namenode界面：http://192.168.200.225:50070/
访问yarn的界面：http://192.168.200.225:8088/
访问历史日志的界面：http://192.168.200.225:19888/