Hadoop HA《hadoop-Yarn》

1.Hadoop-Yarn

可參考我的文章《HadoopHA 搭建》

2.修改環境變數

• cd /opt//hadoop-3.1.2/etc/hadoop
• vi hadoop-env.sh

export JAVA_HOME=/usr/lib/jvm/jdk1.8.0_111
export HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_JOURNALNODE_USER=root
export HDFS_ZKFC_USER=root
export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root

修改組態檔

• vi mapred-site.xml

<!-- 指定mr框架為yarn方式 -->
<property>
  <name>mapreduce.framework.name</name>
  <value>yarn</value>
</property>
<!-- 指定mapreduce jobhistory地址 -->
<property>
  <name>mapreduce.jobhistory.address</name>
  <value>10.1.1.58:10020</value>
</property>
<!-- 任務歷史服務器的web地址 -->
<property>
  <name>mapreduce.jobhistory.webapp.address</name>
  <value>10.1.1.58:19888</value>
</property>
<!-- 配置運行過的日志存放在hdfs上的存放路徑 -->
<property>
<name>mapreduce.jobhistory.done-dir</name>
<value>/history/done</value>
</property>
<!-- 配置正在運行中的日志在hdfs上的存放路徑 -->
<property>
<name>mapreudce.jobhistory.intermediate.done-dir</name>
<value>/history/done/done_intermediate</value>
</property>
<property>
  <name>mapreduce.application.classpath</name>
  <value>
 /opt/test/hadoop-3.1.2/etc/hadoop,
 /opt/test/hadoop-3.1.2/share/hadoop/common/*,
 /opt/test/hadoop-3.1.2/share/hadoop/common/lib/*,
 /opt/test/hadoop-3.1.2/share/hadoop/hdfs/*,
 /opt/test/hadoop-3.1.2/share/hadoop/hdfs/lib/*,
 /opt/test/hadoop-3.1.2/share/hadoop/mapreduce/*,
 /opt/test/hadoop-3.1.2/share/hadoop/mapreduce/lib/*,
 /opt/test/hadoop-3.1.2/share/hadoop/yarn/*,
 /opt/test/hadoop-3.1.2/share/hadoop/yarn/lib/*
  </value>
</property>

• vi yarn-site.xml

<!-- 開啟RM高可用 -->
<property>
  <name>yarn.resourcemanager.ha.enabled</name>
  <value>true</value>
</property>
<!-- 指定RM的cluster id -->
<property>
  <name>yarn.resourcemanager.cluster-id</name>
  <value>yarn-test</value>
</property>
<!-- 指定RM的名字 -->
<property>
  <name>yarn.resourcemanager.ha.rm-ids</name>
  <value>rm1,rm2</value>
</property>
<!-- 分別指定RM的地址 -->
<property>
  <name>yarn.resourcemanager.hostname.rm1</name>
  <value>10.1.1.58</value>
</property>
<property>
  <name>yarn.resourcemanager.hostname.rm2</name>
  <value>10.1.1.195</value>
</property>
<property>
  <name>yarn.resourcemanager.webapp.address.rm1</name>
  <value>10.1.1.58:8088</value>
</property>
<property>
  <name>yarn.resourcemanager.webapp.address.rm2</name>
  <value>10.1.1.195:8088</value>
</property>
<!-- 指定zk集群地址 -->
<property>
  <name>yarn.resourcemanager.zk-address</name>
  <value>10.1.1.201:2181,10.1.1.158:2181,10.1.1.185:2181</value>
</property>
<property>
  <name>yarn.nodemanager.aux-services</name>
  <value>mapreduce_shuffle</value>
</property>
<!-- 開啟日志聚合 -->
<property>
  <name>yarn.log-aggregation-enable</name>
  <value>true</value>
</property>
<property>
  <name>yarn.log-aggregation.retain-seconds</name>
  <value>86400</value>
</property>
<!-- 啟用自動恢復 -->
<property>
  <name>yarn.resourcemanager.recovery.enabled</name>
  <value>true</value>
</property>
<!-- 制定resourcemanager的狀態資訊存盤在zookeeper集群上 -->
<property>
  <name>yarn.resourcemanager.store.class</name>
  <value>org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore</value>
</property>
<!-- Whether virtual memory limits will be enforced for containers. -->
<property>
  <name>yarn.nodemanager.vmem-check-enabled</name>
  <value>false</value>
</property>
<property>
  <name>yarn.nodemanager.vmem-pmem-ratio</name>  <value>3</value>
</property>

分發

scp yarn-site.xml mapred-site.xml root@10.1.1.152:`pwd`
scp yarn-site.xml mapred-site.xml root@10.1.1.195:`pwd`

啟動測驗

zkServer.sh start

start-dfs.sh

start-yarn.sh

啟動命令（會產生兩條警告資訊）：
mr-jobhistory-daemon.sh start historyserver
可以使用命令啟動：
mapred --daemon start historyserver
關閉命令：
 mr-jobhistory-daemon.sh stop historyserver

測驗

http://10.1.1.195:8088

成功