backend

type Backend interface {
	Create([]string, *sync.WaitGroup, io.Writer, io.Writer)
	Destroy([]string, *sync.WaitGroup, io.Writer, io.Writer)
	Start([]string, *sync.WaitGroup, io.Writer, io.Writer)
	Stop([]string, *sync.WaitGroup, io.Writer, io.Writer)
	Scale(string, int, *sync.WaitGroup, io.Writer, io.Writer)
	RollingRestart(string, *sync.WaitGroup, io.Writer, io.Writer)
	SSH(string) error
	SSHExec(string, string) error
	Dock(string, []string) error
	ListMachines() error
	ListUnits() error
	ListUnitFiles() error
	Status(string) error
	Journal(string) error
}