Install Hadoop Core packages on the entire cluster using the instructions provided here.
Ensure that you complete the following set-up requirements for NameNode machines:
Use the floating IP for the NameNode network location (
$DFS_NAME_DIR). Add a DNS entry with a hostname that points to the floating IP address. Use this hostname to specify the NameNode host address.Configure the NameNode data directory as a child of the mounted shared storage directory. For example, if you have the NFS directory mounted at
/hdp/hdfs/nn, then the NameNode data directory should be configured to be at the following location:/hdp/hdfs/nn/data.Replicate the above set-up of the NameNode machine on all the machines in your RHEL HA cluster. Ensure that each machine in the RHEL HA cluster has identical HDP packages and add-on libraries.
