def pull_dkr(url, name, index):
 return _pull_image('dkr', url, name, index=index)

def pull_dkr ( url , name , index ) : return _pull_image ( 'dkr' , url , name , index = index )
execute a machinectl pull-dkr to download a docker image and add it to /var/lib/machines as a new container .