Also point to the machine-config operator docs for SSH key management, to relieve any concerns that the previous note paragraph may have raised ;). It's still a reasonable idea to provide your SSH key at install time so you can access the bootstrap machine for debugging, but as far as production machines go, it won't matter either way (and you'll only get SSH keys on those nodes if they come up alive enough to get a functional machine-config daemon).
These don't have to be RSA keys.
Also point to the machine-config operator docs for SSH key management, to relieve any concerns that the previous note paragraph may have raised ;). It's still a reasonable idea to provide your SSH key at install time so you can access the bootstrap machine for debugging, but as far as production machines go, it won't matter either way (and you'll only get SSH keys on those nodes if they come up alive enough to get a functional machine-config daemon).