admission control: move to v1 API and bump kube to 0.26.0

cmd/webhook-server/admission_controller.go

@@ -24,7 +24,7 @@ import (
 	"log"
 	"net/http"
 
-	admission "k8s.io/api/admission/v1beta1"
+	admission "k8s.io/api/admission/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/runtime/serializer"

cmd/webhook-server/main.go

@@ -23,7 +23,7 @@ import (
 	"net/http"
 	"path/filepath"
 
-	admission "k8s.io/api/admission/v1beta1"
+	admission "k8s.io/api/admission/v1"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )

deployment/deployment.yaml.template

@@ -15,9 +15,6 @@ spec:
       labels:
         app: webhook-server
     spec:
-      securityContext:
-        runAsNonRoot: true
-        runAsUser: 1234
       containers:
       - name: server
         image: stackrox/admission-controller-webhook-demo:latest
@@ -46,14 +43,14 @@ spec:
     - port: 443
       targetPort: webhook-api
 ---
-apiVersion: admissionregistration.k8s.io/v1beta1
+apiVersion: admissionregistration.k8s.io/v1
 kind: MutatingWebhookConfiguration
 metadata:
   name: demo-webhook
 webhooks:
   - name: webhook-server.webhook-demo.svc
     sideEffects: None
-    admissionReviewVersions: ["v1", "v1beta1"]
+    admissionReviewVersions: ["v1"]
     clientConfig:
       service:
         name: webhook-server

go.mod

@@ -3,6 +3,6 @@ module github.com/stackrox/admission-controller-webhook-demo
 go 1.16
 
 require (
-	k8s.io/api v0.22.0
-	k8s.io/apimachinery v0.22.0
+	k8s.io/api v0.26.0
+	k8s.io/apimachinery v0.26.0
 )