✨ Introduce NetworkPolicy for core component workloads.

deploy/chart/templates/0000_50_olm_01-networkpolicies.yaml

@@ -0,0 +1,86 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-deny-all-traffic
+  namespace: {{ .Values.namespace }}
+spec:
+  podSelector: { }
+  policyTypes:
+    - Ingress
+    - Egress
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: olm-operator
+  namespace: {{ .Values.namespace }}
+spec:
+  podSelector:
+    matchLabels:
+      app: olm-operator
+  ingress:
+    - {{ .Values.networkPolicy.metrics | toYaml | nindent 6 | trimSuffix "\n" }}
+  egress:
+    - {{ .Values.networkPolicy.kubeAPIServer | toYaml | nindent 6 | trimSuffix "\n" }}
+    - {{ .Values.networkPolicy.dns | toYaml | nindent 6 | trimSuffix "\n" }}
+  policyTypes:
+    - Ingress
+    - Egress
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: catalog-operator
+  namespace: {{ .Values.namespace }}
+spec:
+  podSelector:
+    matchLabels:
+      app: catalog-operator
+  ingress:
+    - {{ .Values.networkPolicy.metrics | toYaml | nindent 6 | trimSuffix "\n" }}
+  egress:
+    - {{ .Values.networkPolicy.kubeAPIServer | toYaml | nindent 6 | trimSuffix "\n" }}
+    - {{ .Values.networkPolicy.dns | toYaml | nindent 6 | trimSuffix "\n" }}
+    - ports: # This is another distinct rule in the egress list
+      - protocol: TCP
+        port: {{ .Values.catalogGrpcServicePort }}
+  policyTypes:
+    - Ingress
+    - Egress
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: packageserver
+  namespace: {{ .Values.namespace }}
+spec:
+  podSelector:
+    matchLabels:
+      app: packageserver
+  ingress:
+    - ports:
+      - protocol: TCP
+        port: {{ .Values.package.service.internalPort }}
+  egress:
+    - {{ .Values.networkPolicy.dns | toYaml | nindent 6 | trimSuffix "\n" }}
+    - ports:
+      - protocol: TCP
+        port: {{ .Values.catalogGrpcServicePort }}
+  policyTypes:
+  - Ingress
+  - Egress
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default-allow-all
+  namespace: {{ .Values.operator_namespace }}
+spec:
+  podSelector: { }
+  policyTypes:
+    - Ingress
+    - Egress
+  ingress:
+    - { }
+  egress:
+    - { }

deploy/chart/values.yaml

@@ -19,6 +19,8 @@ writeStatusName: '""'
 imagestream: false
 debug: false
 installType: upstream
+catalogGrpcServicePort: 50051
+
 olm:
   replicaCount: 1
   image:
@@ -75,3 +77,33 @@ package:
 monitoring:
   enabled: false
   namespace: monitoring
+
+networkPolicy:
+  dns:
+    ports:
+      - protocol: TCP
+        port: 53
+      - protocol: UDP
+        port: 53
+    to:
+    - namespaceSelector:
+       matchLabels:
+         kubernetes.io/metadata.name: kube-system
+      podSelector:
+       matchLabels:
+         k8s-app: kube-dns
+  kubeAPIServer:
+    ports:
+      - protocol: TCP
+        port: 6443
+    to:
+    - namespaceSelector:
+        matchLabels:
+          kubernetes.io/metadata.name: kube-system
+      podSelector:
+        matchLabels:
+          component: kube-apiserver
+  metrics:
+    ports:
+      - protocol: TCP
+        port: metrics