Postgres (stateful database)

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: postgres
  namespace: data
  labels:
    kguardian.dev/managed-by: kguardian
    kguardian.dev/version: v1.0.0
spec:
  podSelector:
    matchLabels:
      app: postgres
  policyTypes:
    - Ingress
    - Egress
  ingress:
    - from:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: app
          podSelector:
            matchLabels:
              app.kubernetes.io/name: order-api
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: app
          podSelector:
            matchLabels:
              app.kubernetes.io/name: billing-worker
      ports:
        - protocol: TCP
          port: 5432
  egress:
    - to:
        - namespaceSelector:
            matchLabels:
              kubernetes.io/metadata.name: kube-system
          podSelector:
            matchLabels:
              k8s-app: kube-dns
      ports:
        - protocol: UDP
          port: 53

apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: postgres
  namespace: data
  labels:
    kguardian.dev/managed-by: kguardian
    kguardian.dev/version: v1.0.0
spec:
  endpointSelector:
    matchLabels:
      app: postgres
  ingress:
    - fromEndpoints:
        - matchLabels:
            app.kubernetes.io/name: order-api
            io.kubernetes.pod.namespace: app
        - matchLabels:
            app.kubernetes.io/name: billing-worker
            io.kubernetes.pod.namespace: app
      toPorts:
        - ports:
            - port: "5432"
              protocol: TCP
  egress:
    - toEndpoints:
        - matchLabels:
            k8s-app: kube-dns
            io.kubernetes.pod.namespace: kube-system
      toPorts:
        - ports:
            - port: "53"
              protocol: UDP

{
  "defaultAction": "SCMP_ACT_ERRNO",
  "architectures": ["SCMP_ARCH_X86_64"],
  "syscalls": [
    {
      "names": [
        "accept", "accept4", "bind", "close", "connect",
        "epoll_create1", "epoll_ctl", "epoll_wait", "fcntl",
        "fdatasync", "fsync", "ftruncate", "getdents64",
        "listen", "lseek", "openat", "pread64", "pwrite64",
        "read", "recvfrom", "rename", "select", "sendto",
        "setsockopt", "socket", "stat", "unlink", "write"
      ],
      "action": "SCMP_ACT_ALLOW"
    },
    {
      "names": [
        "clone", "execve", "futex", "mmap", "mprotect",
        "munmap", "rt_sigaction", "wait4"
      ],
      "action": "SCMP_ACT_ALLOW"
    }
  ]
}