HDFS HA 的 hdfs-site.xml

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
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<!-- Put site-specific property overrides in this file. -->

<configuration>
	<!--设置nameServices的ID-->
	<property>
	  <name>dfs.nameservices</name>
	  <value>ns1</value>
	</property>	

	<!--ns1有两个nameNode,分别为nn1,nn2-->
	<property>
	  <name>dfs.ha.namenodes.ns1</name>
	  <value>nn1,nn2</value>
	</property>

	<!--由NameServices ID 和 NameNode ID唯一确定NameNode 的主机和端口-->
	<property>
	  <name>dfs.namenode.rpc-address.ns1.nn1</name>
	  <value>hostname-ubuntu.cenzhongman.com:8020</value>
	</property>

	<property>
	  <name>dfs.namenode.rpc-address.ns1.nn2</name>
	  <value>hostname-ubuntu2.cenzhongman.com:8020</value>
	</property>

	<!--HTTP WEB主机和端口-->
	<property>
	  <name>dfs.namenode.http-address.ns1.nn1</name>
	  <value>hostname-ubuntu.cenzhongman.com:50070</value>
	</property>

	<property>
	  <name>dfs.namenode.http-address.ns1.nn2</name>
	  <value>hostname-ubuntu2.cenzhongman.com:50070</value>
	</property>

	<!--JournalNode主机和端口-->
	<property>
	  <name>dfs.namenode.shared.edits.dir</name>
	  <value>qjournal://hostname-ubuntu.cenzhongman.com:8485;hostname-ubuntu2.cenzhongman.com:8485;hostname-ubuntu3.cenzhongman.com:8485/ns1</value>
	</property>

	<!--proxy 设置客户端的代理-->
	<property>
	  <name>dfs.client.failover.proxy.provider.ns1</name>
	  <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
	</property>

	<!--设置进程隔离的方式，使用ssh隔离-->
	<property>
      <name>dfs.ha.fencing.methods</name>
      <value>sshfence</value>
    </property>

    <property>
      <name>dfs.ha.fencing.ssh.private-key-files</name>
      <value>/home/cen/.ssh/id_rsa</value>
    </property>

	<!--设置journalnode 的存储目录-->
	<property>
	  <name>dfs.journalnode.edits.dir</name>
	  <value>/opt/app/hadoop-2.8.0/data/dfs/jn</value>
	</property>

	<!--配置自动故障转移-->
	 <property>
	   <name>dfs.ha.automatic-failover.enabled</name>
	   <value>true</value>
	 </property>
</configuration>