Disable apf in webhook (#120)

Signed-off-by: Jian Qiu <jqiu@redhat.com>

deploy/webhook/deployment.yaml

@@ -24,6 +24,8 @@ spec:
           - "webhook"
           - "--cert-dir=/tmp"
           - "--secure-port=6443"
+          # webhook is not hosting any k8s api resource, so it is not subjected to APF feature
+          - "--feature-gates=APIPriorityAndFairness=false"
         securityContext:
           allowPrivilegeEscalation: false
           capabilities:

pkg/cmd/webhook/webhook.go

@@ -6,6 +6,7 @@ import (
 	admissionserver "github.com/openshift/generic-admission-server/pkg/cmd/server"
 	"github.com/spf13/cobra"
 	genericapiserver "k8s.io/apiserver/pkg/server"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"open-cluster-management.io/work/pkg/webhook"
 )
 
@@ -31,6 +32,11 @@ func NewAdmissionHook() *cobra.Command {
 		},
 	}
 
+	flags := cmd.Flags()
+	featureGate := utilfeature.DefaultMutableFeatureGate
+	featureGate.AddFlag(flags)
+	o.RecommendedOptions.FeatureGate = featureGate
+
 	o.RecommendedOptions.AddFlags(cmd.Flags())
 
 	return cmd