improve IAM module

Signed-off-by: hongming <talonwan@yunify.com>

vendor/k8s.io/apiserver/pkg/admission/initializer/interfaces.go

@@ -21,6 +21,7 @@ import (
 	"k8s.io/apiserver/pkg/authorization/authorizer"
 	"k8s.io/client-go/informers"
 	"k8s.io/client-go/kubernetes"
+	"k8s.io/component-base/featuregate"
 )
 
 // WantsExternalKubeClientSet defines a function which sets external ClientSet for admission plugins that need it
@@ -40,3 +41,14 @@ type WantsAuthorizer interface {
 	SetAuthorizer(authorizer.Authorizer)
 	admission.InitializationValidator
 }
+
+// WantsFeatureGate defines a function which passes the featureGates for inspection by an admission plugin.
+// Admission plugins should not hold a reference to the featureGates.  Instead, they should query a particular one
+// and assign it to a simple bool in the admission plugin struct.
+// func (a *admissionPlugin) InspectFeatureGates(features featuregate.FeatureGate){
+//     a.myFeatureIsOn = features.Enabled("my-feature")
+// }
+type WantsFeatures interface {
+	InspectFeatureGates(featuregate.FeatureGate)
+	admission.InitializationValidator
+}