refactor(gitops): establish platform ownership boundaries

clusters/dev-k3s/overlays/platform/vault/kustomization.yaml

@@ -0,0 +1,9 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+namespace: vault
+
+resources:
+  - ../../../../../platform/shared-services/vault/base
+  - namespace.yaml
+  - networkpolicy.yaml

clusters/dev-k3s/overlays/platform/vault/namespace.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: vault
+  annotations:
+    argocd.argoproj.io/sync-options: Prune=confirm,Delete=confirm
+  labels:
+    pod-security.kubernetes.io/enforce: baseline
+    pod-security.kubernetes.io/enforce-version: latest
+    pod-security.kubernetes.io/warn: restricted
+    pod-security.kubernetes.io/warn-version: latest
+    pod-security.kubernetes.io/audit: restricted
+    pod-security.kubernetes.io/audit-version: latest

clusters/dev-k3s/overlays/platform/vault/networkpolicy.yaml

@@ -0,0 +1,118 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: vault-server-default-deny
+spec:
+  podSelector:
+    matchLabels:
+      app: vault
+  policyTypes:
+    - Ingress
+    - Egress
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: vault-server-allow-dns-egress
+spec:
+  podSelector:
+    matchLabels:
+      app: vault
+  policyTypes:
+    - Egress
+  egress:
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+          podSelector:
+            matchLabels:
+              k8s-app: kube-dns
+      ports:
+        - protocol: UDP
+          port: 53
+        - protocol: TCP
+          port: 53
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: vault-server-allow-postgres-egress
+spec:
+  podSelector:
+    matchLabels:
+      app: vault
+  policyTypes:
+    - Egress
+  egress:
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: auth-system-dev
+          podSelector:
+            matchLabels:
+              app: postgres
+      ports:
+        - protocol: TCP
+          port: 5432
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: vault-server-allow-kubernetes-api-egress
+spec:
+  podSelector:
+    matchLabels:
+      app: vault
+  policyTypes:
+    - Egress
+  egress:
+    - to:
+        - ipBlock:
+            cidr: 10.43.0.1/32
+      ports:
+        - protocol: TCP
+          port: 443
+    - to:
+        - ipBlock:
+            cidr: 10.208.141.98/32
+      ports:
+        - protocol: TCP
+          port: 6443
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: vault-server-allow-ingress-from-workloads
+spec:
+  podSelector:
+    matchLabels:
+      app: vault
+  policyTypes:
+    - Ingress
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: auth-dev
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: auth-system-dev
+      ports:
+        - protocol: TCP
+          port: 8200
+---
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: vault-agent-injector-webhook-ingress
+spec:
+  podSelector:
+    matchLabels:
+      app.kubernetes.io/name: vault-agent-injector
+  policyTypes:
+    - Ingress
+  ingress:
+    - ports:
+        - protocol: TCP
+          port: 8080