apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: waitlist-api-egress
  namespace: customer1
spec:
  podSelector:
    matchLabels:
      app: waitlist-api
  policyTypes:
    - Egress
  egress:
    # Allow DNS resolution (required for api.telegram.org lookups)
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
        - podSelector:
            matchLabels:
              k8s-app: kube-dns
      ports:
        - protocol: UDP
          port: 53
        - protocol: TCP
          port: 53
    # Allow PostgreSQL to CNPG cluster
    - to:
        - podSelector:
            matchLabels:
              cnpg.io/cluster: siriusdevops-pgdb
      ports:
        - protocol: TCP
          port: 5432
    # Allow Telegram Bot API
    - to:
        - ipBlock:
            cidr: 0.0.0.0/0
            except:
              - 10.0.0.0/8
              - 172.16.0.0/12
              - 192.168.0.0/16
      ports:
        - protocol: TCP
          port: 443