vault: only ESO, Envoy and the node reach Vault

vault/networkpolicy.yaml

@@ -0,0 +1,68 @@
+# Vault holds every secret, so only ESO, the UI through Envoy, and the
+# node reach it (the API server calls the injector's webhook from there;
+# 10.1.7.64 is the node's Calico VXLAN address,
+# projectcalico.org/IPv4VXLANTunnelAddr). Nothing uses agent injection.
+# The pods reach each other (raft on 8201, the OIDC job), DNS, the API
+# server (service registration labels the active pod, the injector) and
+# the internet (the OIDC login through authentik's public address).
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: default
+spec:
+  podSelector: {}
+  policyTypes:
+    - Ingress
+    - Egress
+  ingress:
+    - from:
+        - podSelector: {}
+    - from:
+        - ipBlock:
+            cidr: 192.168.1.204/32
+        - ipBlock:
+            cidr: 10.1.7.64/32
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: envoy-gateway-system
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: envoy
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: external-secrets
+          podSelector:
+            matchLabels:
+              app.kubernetes.io/name: external-secrets
+      ports:
+        - port: 8200
+  egress:
+    - to:
+        - podSelector: {}
+    - to:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: kube-system
+          podSelector:
+            matchLabels:
+              k8s-app: kube-dns
+      ports:
+        - protocol: UDP
+          port: 53
+        - protocol: TCP
+          port: 53
+    - to:
+        - ipBlock:
+            cidr: 192.168.1.204/32
+      ports:
+        - port: 16443
+    - to:
+        - ipBlock:
+            cidr: 0.0.0.0/0
+            except:
+              - 10.0.0.0/8
+              - 100.64.0.0/10
+              - 169.254.0.0/16
+              - 172.16.0.0/12
+              - 192.168.0.0/16