fix: configure network policies outside kyverno if possible (and stuff)

2024-02-19 15:33:31 +01:00
parent b53088ca4e
commit 839a96dc39
9 changed files with 107 additions and 23 deletions
@@ -0,0 +1,63 @@
+apiVersion: kyverno.io/v1
+kind: ClusterPolicy
+metadata:
+  name: allow-namespace-traffic
+  annotations:
+    policies.kyverno.io/title: Generate NetworkPolicy to Existing Namespaces
+    policies.kyverno.io/subject: Namespace, NetworkPolicy
+    kyverno.io/kyverno-version: 1.7.0
+    policies.kyverno.io/minversion: 1.7.0
+    kyverno.io/kubernetes-version: "1.23"
+    policies.kyverno.io/description: >-
+      Allow all ingress/egress traffic within a namespace.
+      Allow egress to any pods in the cluster
+      Allow DNS with layer 7 inspection
+spec:
+  generateExistingOnPolicyUpdate: true
+  rules:
+  - name: allow-namespace-traffic
+    match:
+      any:
+      - resources:
+          kinds:
+          - Namespace
+    generate:
+      synchronize: true
+      apiVersion: cilium.io/v2
+      kind: CiliumNetworkPolicy
+      name: allow-namespace-traffic
+      namespace: "{{request.object.metadata.name}}"
+      data:
+        metadata:
+          labels:
+            created-by: kyverno
+        spec:
+          endpointSelector: {}
+          description: "Allow all traffic within a namespace, allow dns, allow egress to all entities in cluster"
+          ingress:
+            - fromEndpoints:
+                - {}
+            - fromEndpoints:
+              - matchExpressions:
+                - key: io.kubernetes.pod.namespace
+                  operator: Exists
+          egress:
+            - toEndpoints:
+              - matchExpressions:
+                - key: io.kubernetes.pod.namespace
+                  operator: Exists
+              #authentication:
+              #  mode: "required"
+            - toEndpoints:
+                - matchLabels:
+                    io.kubernetes.pod.namespace: kube-system
+                    k8s-app: kube-dns
+              toPorts:
+                - ports:
+                    - port: "53"
+                      protocol: UDP
+                  rules:
+                    dns:
+                      - matchPattern: "*"
+              #authentication:
+              #  mode: "required"
@@ -0,0 +1,44 @@
+apiVersion: kyverno.io/v1
+kind: ClusterPolicy
+metadata:
+  annotations:
+    policies.kyverno.io/category: Sample
+    policies.kyverno.io/description: 'Secrets like registry credentials often need
+      to exist in multiple Namespaces so Pods there have access. Manually duplicating
+      those Secrets is time consuming and error prone. This policy will copy a Secret
+      called `regcred` which exists in the `default` Namespace to new Namespaces when
+      they are created. It will also push updates to the copied Secrets should the
+      source Secret be changed.            '
+  creationTimestamp: "2024-01-15T11:58:24Z"
+  name: sync-oceanbox-regcred
+spec:
+  admission: true
+  background: true
+  generateExisting: true
+  rules:
+  - generate:
+      apiVersion: v1
+      clone:
+        # name: oceanbox-regcred
+        name: gitlab-pull-secret
+        namespace: default
+      kind: Secret
+      # name: oceanbox-regcred
+      name: gitlab-pull-secret
+      namespace: '{{request.object.metadata.name}}'
+      synchronize: true
+    exclude:
+      any:
+      - resources:
+          kinds:
+          - Namespace
+          names:
+          - "vcluster-*"
+    match:
+      any:
+      - resources:
+          kinds:
+          - Namespace
+    name: sync-oceanbox-regcred
+
+