1. On each system you are going to install a Data Repository (DR) node, generate the public/private keypair as root:
ssh-keygen -N "" -t rsa -f ~/.ssh/id_rsa
This will create the following files under the .ssh directory in the home directory of the root user:
id_rsa (private key)
id_rsa.pub (public key)
These are plain text files there fore the contents of the id_rsa.pub can be copy/pasted between systems.
2) On each node, make sure the contents of the ~/.ssh/id_rsa.pub is appended to the .ssh/authorized_keys2 file in the
root users home directory on all the nodes in the DR cluster by copying and pasting. Each node should end up with
the public key of every other system as well as its own.
3) To test on every system run the following replacing <hostname> with the hostname of the DR node you are connecting to:
ssh <hostname> ls
This should be done from each node to every other node and to itself and no password should be required.
Note that if this the first time two systems are connecting to each other vi SSH it may prompt you to confirm
the fingerprint of the server you are connecting to, this is normal.