chore(apps): Add network policies to apps

add-ons/postgres/kustomization.yaml

@@ -9,3 +9,4 @@ resources:
   - pgweb-db-sealedsecret.yaml
   - redoost-db-sealedsecret.yaml
   - redoost-database.yaml
+  - networkpolicy.yaml

add-ons/postgres/networkpolicy.yaml

@@ -0,0 +1,72 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: postgres
+  namespace: postgres
+spec:
+  egress:
+    - ports:
+        - port: 53
+          protocol: UDP
+        - port: 53
+          protocol: TCP
+      to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+          podSelector:
+            matchLabels:
+              k8s-app: kube-dns
+    - ports:
+        - port: 6443
+          protocol: TCP
+    - to:
+        - podSelector:
+            matchLabels:
+              cnpg.io/cluster: postgres
+  ingress:
+    - from:
+        - podSelector:
+            matchLabels:
+              cnpg.io/cluster: postgres
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: cnpg-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: cloudnative-pg
+      ports:
+        - port: 8000
+          protocol: TCP
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: authentik
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: authentik
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: monitoring
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: grafana
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: pgweb
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: pgweb
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: redoost
+      ports:
+        - port: 5432
+          protocol: TCP
+  podSelector:
+    matchLabels:
+      cnpg.io/cluster: postgres
+  policyTypes:
+    - Ingress
+    - Egress