name: "correct ipv4 address",
			ip: &networkingv1alpha1.IPAddress{
				ObjectMeta: metav1.ObjectMeta{
					Name: "10.0.1.1",
					Labels: map[string]string{
						networkingv1alpha1.LabelIPAddressFamily: string(v1.IPv4Protocol),
						networkingv1alpha1.LabelManagedBy:       ipallocator.ControllerName,
					},
					CreationTimestamp: metav1.Date(2012, 1, 1, 0, 0, 0, 0, time.UTC),
				},
				Spec: networkingv1alpha1.IPAddressSpec{

	}{
		{
			name: "ipv4, localhost-nodeports enabled",

			family:             v1.IPv4Protocol,
			localhostNodePorts: true,
			nodePortAddresses:  nil,

			allowAltNodeIP: true,
			expectFirewall: true,
		},
		{
			name: "ipv4, localhost-nodeports disabled",

			family:             v1.IPv4Protocol,
			localhostNodePorts: false,
			nodePortAddresses:  nil,

			allowAltNodeIP: true,

		e.queue.AddAfter(key, e.endpointUpdatesBatchPeriod)
	}
}

func podToEndpointAddressForService(svc *v1.Service, pod *v1.Pod) (*v1.EndpointAddress, error) {
	var endpointIP string
	ipFamily := v1.IPv4Protocol

	if len(svc.Spec.IPFamilies) > 0 {
		// controller is connected to an api-server that correctly sets IPFamilies
		ipFamily = svc.Spec.IPFamilies[0] // this works for headful and headless
	} else {

// to express the family of an IP expressed by a type (e.g. service.spec.ipFamilies).
type IPFamily string

const (
	// IPv4Protocol indicates that this IP is IPv4 protocol
	IPv4Protocol IPFamily = "IPv4"
	// IPv6Protocol indicates that this IP is IPv6 protocol
	IPv6Protocol IPFamily = "IPv6"
)

var supportedServiceInternalTrafficPolicy = sets.New(core.ServiceInternalTrafficPolicyCluster, core.ServiceInternalTrafficPolicyLocal)

var supportedServiceIPFamily = sets.New(core.IPv4Protocol, core.IPv6Protocol)
var supportedServiceIPFamilyPolicy = sets.New(
	core.IPFamilyPolicySingleStack,
	core.IPFamilyPolicyPreferDualStack,
	core.IPFamilyPolicyRequireDualStack)

// to express the family of an IP expressed by a type (e.g. service.spec.ipFamilies).
// +enum
type IPFamily string

const (
	// IPv4Protocol indicates that this IP is IPv4 protocol
	IPv4Protocol IPFamily = "IPv4"
	// IPv6Protocol indicates that this IP is IPv6 protocol
	IPv6Protocol IPFamily = "IPv6"
	// IPFamilyUnknown indicates that this IP is unknown protocol