Chapter 5. Configure Public Key based SSH Authentication without a password

Configure public key based SSH authentication without a password for the root user on the first virtualization host to all hosts, including itself. Do this for all storage and management interfaces, and for both IP addresses and FQDNs.

See the Red Hat Enterprise Linux 7 Installation Guide for more details: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/s1-ssh-configuration.html#s2-ssh-configuration-keypairs.