forwarder

type Option struct {
	LocalPort   int    // the local port for forwarding
	RemotePort  int    // the remote port port for forwarding
	Namespace   string // the k8s namespace metadata
	PodName     string // the k8s pod metadata
	ServiceName string // the k8s service metadata
	Source      string // the k8s source string, eg: svc/my-nginx-svc po/my-nginx-66b6c48dd5-ttdb2
}

type PodOption struct {
	LocalPort int    // the local port for forwarding
	PodPort   int    // the k8s pod port
	Pod       v1.Pod // the k8s pod metadata
}

type Result struct {
	Close func()                                        // close the port forwarding
	Ready func() ([][]portforward.ForwardedPort, error) // block till the forwarding ready
	Wait  func()                                        // block and listen IOStreams close signal
}