Add IP mode field

pkg/features/kube_features.go

@@ -885,6 +885,12 @@ const (
 	//
 	// Enables In-Place Pod Vertical Scaling
 	InPlacePodVerticalScaling featuregate.Feature = "InPlacePodVerticalScaling"
+
+	// owner: @Sh4d1,@RyanAoh
+	// kep: http://kep.k8s.io/1860
+	// alpha: v1.29
+	// LoadBalancerIPMode enables the IPMode field in the LoadBalancerIngress status of a Service
+	LoadBalancerIPMode featuregate.Feature = "LoadBalancerIPMode"
 )
 
 func init() {
@@ -1124,6 +1130,8 @@ var defaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureS
 
 	PodIndexLabel: {Default: true, PreRelease: featuregate.Beta},
 
+	LoadBalancerIPMode: {Default: false, PreRelease: featuregate.Alpha},
+
 	// inherited features from generic apiserver, relisted here to get a conflict if it is changed
 	// unintentionally on either side: