Add a new HBase master to an existing cluster

Log in to the Ambari management interface as a cluster administrator.
admin/admin
In Ambari Web, browse to Services > HBase.
In Service Actions, click + Add HBase Master.
Choose the host on which to install the additional HBase master; then click Confirm Add.

Ambari installs the new HBase Master and reconfigures HBase to manage multiple Master instances.

Add a standby HBase master to the cluster.