hadoop-zookeeper的HA集群的搭建

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
        <!--指定hdfs的nameservices需要与core-site中的相同-->
        <property>
                <name>dfs.nameservices</name>
                <value>ns</value>
        </property>
        <!--ns下面有两个NameNode-->
         <property>
                <name>dfs.ha.namenodes.ns</name>
                <value>nn1,nn2</value>
        </property>
        <!--nn1的RPC通信地址-->
         <property>
                <name>dfs.namenode.rpc-address.ns.nn1</name>
                <value>han01:9000</value>
        </property>
        <!--nn1的http通信地址-->
         <property>
                <name>dfs.namenode.http-address.ns.nn1</name>
                <value>han01:50070</value>
        </property>
        <!--nn2的RPC通信地址-->
         <property>
                <name>dfs.namenode.rpc-address.ns.nn2</name>
                <value>han02:9000</value>
        </property>
        <!--nn2的http通信地址-->
         <property>
                <name>dfs.namenode.http-address.ns.nn2</name>
                <value>han02:50070</value>
        </property>
        <!--指定NameNode的元数据在JournalNode上的存放-->
         <property>
                <name>dfs.namenode.shared.edits.dir</name>
                <value>qjournal://han01:8485;han02:8485;han03:8485/ns</value>
        </property>
        <!--指定JournalNode的本地存放地址-->
         <property>
                <name>dfs.journalnode.edits.dir</name>
                <value>/zhiyou/hadoop/journal</value>
        </property>
         <!--开启NameNode故障时自动切换-->
         <property>
                <name>dfs.ha.automatic-failover.enabled</name>
                <value>true</value>
        </property>
        <!--配置失败自动切换的实现方式-->
        <property>
                <name>dfs.client.failover.proxy.provider.ns</name>
                <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
        </property>
        <!--配置隔离机制-->
        <property>
                <name>dfs.ha.fencing.methods</name>
                <value>sshfence</value>
        </property>
        <!--设置免密登录-->
        <property>
                <name>dfs.ha.fencing.ssh.private-key-files</name>
                <value>/root/.ssh/id_rsa</value>
        </property>
        
        <!--设置name和data的存储目录-->
        <property>
                <name>dfs.namenode.name.dir</name>
                <value>file:///zhiyou/hadoop/hdfs/name</value>
        </property>
        <property>
                <name>dfs.datanode.data.dir</name>
                <value>file:///zhiyou/hadoop/hdfs/data</value>
        </property>
        <property>
                <name>dfs.replication</name>
                <value>3</value>
        </property>
        <!--在NN和DN上开启WebHDFS(rest API)功能,不是必须-->
        <property>
                <name>dfs.webhdfs.enabled</name>
                <value>true</value>
        </property>
</configuration>