十六、YARN和MapReduce配置

发布时间:2023年12月19日

1、部署前提

(1)配置前提

已经配置好Hadoop集群。

配置内容:

(2)部署说明

(3)集群规划

2、修改配置文件

MapReduce

(1)修改mapred-env.sh配置文件

export JAVA_HOME=/export/server/jdk
export HADOOP_JOB_HISTORYSERVER_HEAPSIZE=1000
export HADOOP_MAPRED_ROOT_LOGGER=INFO,RFA

(2)修改mapred-site.xml配置文件

<configuration>
  <property>
    <name>mapreduce.framework.name</name>
    <value>yarn</value>
    <description></description>
  </property>
  <property>
    <name>mapreduce.jobhistory.address</name>
    <value>node1:10020</value>
    <description></description>
  </property>
  <property>
    <name>mapreduce.jobhistory.webapp.address</name>
    <value>node1:19888</value>
    <description></description>
  </property>
  <property>
    <name>mapreduce.jobhistory.intermediate-done-dir</name>
    <value>/data/mr-history/tmp</value>
    <description></description>
  </property>
  <property>
    <name>mapreduce.jobhistory.done-dir</name>
    <value>/data/mr-history/done</value>
    <description></description>
  </property>
  <property>
    <name>yarn.app.mapreduce.am.env</name>
    <value>HADOOP_MAPRED_HOME=$HADOOP_HOME</value>
  </property>
  <property>
    <name>mapreduce.map.env</name>
    <value>HADOOP_MAPRED_HOME=$HADOOP_HOME</value>
  </property>
  <property>
    <name>mapreduce.reduce.env</name>
    <value>HADOOP_MAPRED_HOME=$HADOOP_HOME</value>
  </property>
</configuration>

yarn

(1)修改yarn-env.sh文件

export JAVA_HOME=/export/server/jdk
export HADOOP_HOME=/export/server/hadoop
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
# export YARN_CONF_DIR=$HADOOP_HOME/etc/hadoop
# export YARN_LOG_DIR=$HADOOP_HOME/logs/yarn
export HADOOP_LOG_DIR=$HADOOP_HOME/logs

(2)修改yarn-site.xml文件

<configuration>

<!-- Site specific YARN configuration properties -->
<property>
    <name>yarn.log.server.url</name>
    <value>http://node1:19888/jobhistory/logs</value>
    <description></description>
</property>

  <property>
    <name>yarn.web-proxy.address</name>
    <value>node1:8089</value>
    <description>proxy server hostname and port</description>
  </property>


  <property>
    <name>yarn.log-aggregation-enable</name>
    <value>true</value>
    <description>Configuration to enable or disable log aggregation</description>
  </property>

  <property>
    <name>yarn.nodemanager.remote-app-log-dir</name>
    <value>/tmp/logs</value>
    <description>Configuration to enable or disable log aggregation</description>
  </property>


<!-- Site specific YARN configuration properties -->
  <property>
    <name>yarn.resourcemanager.hostname</name>
    <value>node1</value>
    <description></description>
  </property>

  <property>
    <name>yarn.resourcemanager.scheduler.class</name>
    <value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler</value>
    <description></description>
  </property>

  <property>
    <name>yarn.nodemanager.local-dirs</name>
    <value>/data/nm-local</value>
    <description>Comma-separated list of paths on the local filesystem where intermediate data is written.</description>
  </property>


  <property>
    <name>yarn.nodemanager.log-dirs</name>
    <value>/data/nm-log</value>
    <description>Comma-separated list of paths on the local filesystem where logs are written.</description>
  </property>


  <property>
    <name>yarn.nodemanager.log.retain-seconds</name>
    <value>10800</value>
    <description>Default time (in seconds) to retain log files on the NodeManager Only applicable if log-aggregation is disabled.</description>
  </property>



  <property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
    <description>Shuffle service that needs to be set for Map Reduce applications.</description>
  </property>
</configuration>

?分发配置文件

?3、开启YARN服务器集群

(1)node1节点,以Hadoop用户,执行如下语句:

//开启Hadoop集群
start-dfs.sh
//开启yarn集群
start-yarn.sh
//因为代理服务器已经在配置文件中配置完毕,但历史服务器需要手动开启
//开启历史服务器
mapred --daemon start historyserver

(2)执行结果展示、

(3)查看YARN的Web-UI页面

????????打开本地浏览器,输入node1:8088,即可打开本地YARN的Web-UI页面。

4、总结

文章来源:https://blog.csdn.net/2301_79149013/article/details/135026710
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