I have built a all in one from source. got everything working, I have another box with kvm and libvirt etc do I have to install opennebula on that box to make it a node or is just use onehost command after I set up oneadmin user and groups and ssh on said box
You will need to create the oneadmin user the kvm box, configure libvirt and kvm according to: http://docs.opennebula.org/4.14/administration/virtualization/kvmg.html
set-up ssh keys (oneadmin user in frontend should be able to access this kvm box without password), configure network, etc…
and then simply add it to opennebula using onehost.