Should be the same as a clone on a physical system 1383621.1.
If you're asking about cloning the VM itself, you basically
1) Run preclone steps on source system.
2) Shutdown the database and clone the VM with the disks. (You can leave the database running, but you run the risk of the cloned database being in a corrupted state).
3) Reconfigure the cloned machines with new names and ip addresses.
4) Start following the cloning document from section 3.2...