I have been spending some time learning the OVM 3 CLI since it was released in the earlier 3.x versions, however the biggest roadblock for me has always been that they only allow access via SSH on port 10000. However now I know how to enable key based authentication for these connections opening this up for a much more robust scripting experience.
Connect to OVM CLI with Password
$ ssh -p 10000 firstname.lastname@example.org email@example.com's password: OVM>
Authorize Keys for OVM CLI
To allow key based authentication to OVM CLI simply add your public key on your OVM Manager Server to /home/oracle/.ssh/ovmcli_authorized_keys. For our environment we already had everyone who needed access in the authorized_keys for root.
# cat /root/.ssh/authorized_keys >> /home/oracle/.ssh/ovmcli_authorized_keys
However if you wanted to do it remotely using the public key file directly from your client.
# cat .ssh/id_rsa.pub | ssh firstname.lastname@example.org "cat >> /home/oracle/.ssh/ovmcli_authorized_keys"
Connect to OVM CLI with Public Keys
Now our connection is without that pesky password prompt.
$ ssh -p 10000 email@example.com OVM>