[Users] Passing a hint/message to a VM when it boots

Hello, when creating a new VM from a template, i'd like to pass a hint of some sort ( perhaps a hostname ) to it so that the internal config managment system can do the rest of the setup. This should also be programmable via the REST API, as I want to use it for automated deployments. Has anyone had success doing this with Ovirt? i can only see two approaches: - Put the hint in a floppy / iso and mount it on the VM. - Hardcode a MAC address and let a DHCP server provide the hostname Both of these do not seem very optimal to me. I'd appreciate some thoughts from the community on how to proceed. Thanks in advance, k