YARN HA配置

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先把HDFS HA配置了

HDFS HA教程地址

官方配置文档位置（英语好去看看）

https://hadoop.apache.org/docs/r2.7.2/hadoop-yarn/hadoop-yarn-site/ResourceManagerHA.html

https://hadoop.apache.org/docs/r2.7.2/hadoop-yarn/hadoop-yarn-site/ResourceManagerRestart.html

配置yarn-site.xml

<configuration>
<!-- Reducer获取数据的方式 -->
<property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
</property>

<!--启用resourcemanager ha-->
<property>
	<name>yarn.resourcemanager.ha.enabled</name>
	<value>true</value>
</property>

<!--声明两台resourcemanager的地址-->
<property>
	<name>yarn.resourcemanager.cluster-id</name>
	<value>cluster-yarn1</value>
</property>

<property>
	<name>yarn.resourcemanager.ha.rm-ids</name>
	<value>rm1,rm2</value>
</property>

<property>
	<name>yarn.resourcemanager.hostname.rm1</name>
	<value>server1</value>
</property>

<property>
	<name>yarn.resourcemanager.hostname.rm2</name>
	<value>server2</value>
</property>

<!--指定zookeeper集群的地址--> 
<property>
	<name>yarn.resourcemanager.zk-address</name>
	<value>server1:2181,server2:2181,server3:2181</value>
</property>

<!--启用自动恢复--> 
<property>
	<name>yarn.resourcemanager.recovery.enabled</name>
	<value>true</value>
</property>

<!--指定resourcemanager的状态信息存储在zookeeper集群--> 
<property>
	<name>yarn.resourcemanager.store.class</name>     
	<value>org.apache.hadoop.yarn.server.resourcemanager.recovery.ZKRMStateStore</value>
</property>
</configuration>

运行YARN

1. 第一个节点输入

sbin/start-yarn.sh

2. 第二个节点输入

sbin/yarn-daemon.sh start resourcemanager

3. 查看服务状态

bin/yarn rmadmin -getServiceState rm1