func NewFake() *FakeIPVS {
	return &FakeIPVS{
		Services:     make(map[ServiceKey]*utilipvs.VirtualServer),
		Destinations: make(map[ServiceKey][]*utilipvs.RealServer),
	}
}

func toServiceKey(serv *utilipvs.VirtualServer) ServiceKey {
	return ServiceKey{
		IP:       serv.Address.String(),
		Port:     serv.Port,
		Protocol: serv.Protocol,
	}
}