Can not log in to controller node

Hi,

I have installed RHEL 7.1 OSP on a machine. I am deploying 2Compute + 1Controller nodes. In this process, the controller node first boots up on RHEL OS through PXE boot and then is asking for login and password. Where should I find its login and password?

Also during the rhel-osp-installer command, it asks for SSH password wherein I had provided a password. But this password is not working on controller node. Please suggest..