add patch for networkpolicy

Author: soerenschneider

apps/homer/components/istio/kustomization.yaml

@@ -3,3 +3,17 @@ apiVersion: kustomize.config.k8s.io/v1alpha1
 kind: Component
 resources:
   - istio-virtualservice.yaml
+patches:
+  - target:
+      kind: NetworkPolicy
+      name: homer
+    patch: |-
+      - op: add
+        path: "/spec/ingress/0/from/-"
+        value:
+          namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: "istio-system"
+          podSelector:
+            matchLabels:
+              istio: "ingressgateway"