core-site.xml 

<property>
  <name>fs.defaultFS</name>
  <value>hdfs://mycluster</value>
</property>

<property>
  <name>hadoop.tmp.dir</name>
  <value>/mnt/data/full</value>
</property>

<property>
   <name>ha.zookeeper.quorum</name>
   <value>node1:2181,node2:2181,node3:2181</value>
 </property>

 

hdfs-site.xml

<property>
    <name>dfs.nameservices</name>
    <value>mycluster</value>
</property>
<property>
  <name>dfs.ha.namenodes.mycluster</name>
  <value>nn1,nn2</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.mycluster.nn1</name>
  <value>node1:8020</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.mycluster.nn2</name>
  <value>node2:8020</value>
</property>
<property>
  <name>dfs.namenode.http-address.mycluster.nn1</name>
  <value>node1:50070</value>
</property>
<property>
  <name>dfs.namenode.http-address.mycluster.nn2</name>
  <value>node2:50070</value>
</property>

<property>
  <name>dfs.namenode.shared.edits.dir</name>
 <value>qjournal://node1:8485;node2:8485;node3:8485/mycluster</value>
</property>
<property>
  <name>dfs.journalnode.edits.dir</name>
  <value>/mnt/data/journal</value>
</property>

<property>
  <name>dfs.client.failover.proxy.provider.mycluster</name>
  <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
 <property>
      <name>dfs.ha.fencing.methods</name>
      <value>sshfence</value>
    </property>

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

 <property>
   <name>dfs.ha.automatic-failover.enabled</name>
   <value>true</value>
 </property>