[libvirt-users] building virtual desktops with libvirt, KVM, SPICE and GNOME

Can anybody comment on how to host virtual desktops on a headless server using libvirt and KVM on the server and a SPICE client to access the virtual desktop? Is there a standard way of doing this? I've seen many fragments of information about how to do this but I didn't come across a single guide describing the entire solution. Search engines also return a lot of information about gaining remote access to a real physical desktop but that is not what I'm looking for. I've also come across many real-world scenarios where people are manually starting VNC server processes for each user on different ports but I was hoping to find out if there is a more standard way of doing this now. When I say "virtual desktop", the type of user experience I'm thinking about is that named users can run a SPICE client anywhere and always connect to the same host/desktop. E.g. if they leave some windows open, disconnect, go to another physical machine and reconnect with the same username they will see the same desktop with the same windows open. Regards, Daniel