Network Policy Example

This reference example demonstrates configuring Kubernetes NetworkPolicy resources on GKE.

It includes:

• Default-deny ingress NetworkPolicy to isolate pods in the namespace
• Targeted ingress NetworkPolicy allowing traffic strictly from specific pods

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: nginx-ingress-deny-all
  namespace: nginx-ns
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: nginx
  policyTypes:
    - Ingress
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-ingress-from-my-app
  namespace: nginx-ns
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: nginx
  policyTypes:
    - Ingress
  ingress:
    - from:
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: my-app
      ports:
        - protocol: TCP
          port: 8080