On 03/08/2016 10:14 AM, Sandro Bonazzola wrote: In the API the "run once" mode is enabled adding a "vm" element to the action, something like this: POST /vms/{vm:id}/start <action> <vm> ... </vm> </action> Unfortunately the CLI doesn't have any mechanism to say that you want to send an empty element. To do it you will need to pass some option that forces the inclusion of that "vm" element. If you don't want to actually change anything in the VM then you can just pass the name, which will be ignored: action vm myvm start --vm-name myvm If you want to do something more complicated, like passing other boot options, or using cloud-init or sysprep, I'd suggest you consider using one of the SDKs instead of the CLI. -- Dirección Comercial: C/Jose Bardasano Baos, 9, Edif. Gorbea 3, planta 3ºD, 28016 Madrid, Spain Inscrita en el Reg. Mercantil de Madrid – C.I.F. B82657941 - Red Hat S.L.