Added e2e test to check nginx update pass witth nginx validation webhook after canary promotion

Signed-off-by: Iaroslav Vorozhko <iaroslav.vorozhko@mcmakler.de>

test/nginx/install.sh

@@ -14,6 +14,7 @@ helm upgrade -i ingress-nginx ingress-nginx/ingress-nginx --version=${NGINX_HELM
 --wait \
 --namespace ingress-nginx \
 --set controller.metrics.enabled=true \
+--set controller.admissionWebhooks.enabled=true \
 --set controller.podAnnotations."prometheus\.io/scrape"=true \
 --set controller.podAnnotations."prometheus\.io/port"=10254 \
 --set controller.service.type=NodePort

test/nginx/test-canary.sh

@@ -195,6 +195,30 @@ done
 
 echo '✔ Canary promotion test passed'
 
+echo 'Testing original ingress update after canary promotion to pass validation webhook'
+
+cat <<EOF | kubectl apply -f -
+apiVersion: networking.k8s.io/v1beta1
+kind: Ingress
+metadata:
+  name: podinfo
+  namespace: test
+  labels:
+    app: podinfo
+  annotations:
+    kubernetes.io/ingress.class: "nginx"
+spec:
+  rules:
+    - host: app.example.com
+      http:
+        paths:
+          - backend:
+              serviceName: podinfo
+              servicePort: 80
+EOF
+
+echo '✔ Original ingress update with validation webhook passed'
+
 cat <<EOF | kubectl apply -f -
 apiVersion: flagger.app/v1beta1
 kind: Canary