add debug handler capability for individual controllers

cmd/kube-controller-manager/app/rbac.go

@@ -17,17 +17,19 @@ limitations under the License.
 package app
 
 import (
+	"net/http"
+
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/kubernetes/pkg/controller/clusterroleaggregation"
 )
 
-func startClusterRoleAggregrationController(ctx ControllerContext) (bool, error) {
+func startClusterRoleAggregrationController(ctx ControllerContext) (http.Handler, bool, error) {
 	if !ctx.AvailableResources[schema.GroupVersionResource{Group: "rbac.authorization.k8s.io", Version: "v1", Resource: "clusterroles"}] {
-		return false, nil
+		return nil, false, nil
 	}
 	go clusterroleaggregation.NewClusterRoleAggregation(
 		ctx.InformerFactory.Rbac().V1().ClusterRoles(),
 		ctx.ClientBuilder.ClientOrDie("clusterrole-aggregation-controller").RbacV1(),
 	).Run(5, ctx.Stop)
-	return true, nil
+	return nil, true, nil
 }