Kubernetes Network Policy more examples

Example 1:

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: db-policy
spec:
  podSelector:
    matchLabels:
      role: db # Pods where the NetPol will be applied
  policyTypes:
  - Ingress
  ingress:
  - from:
    - podSelector:
        matchLabels:
          name: api-pod # the api-pod will have rights to connect to db Pod on port 3306
      namespaceSelector: # this with podSelector acts as AND, put - to make it OR
        matchLabels:
          name: prod
    - ipBlock: # the address of external server
        cidr: 192.168.5.10/32
    ports:
    - protocol: TCP
      port: 3306

Example 2:

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: db-policy
spec:
  podSelector:
    matchLabels:
      role: db # Pods where the NetPol will be applied
  policyTypes:
  - Ingress
  - Egresss
  ingress:
  - from:
    - podSelector:
        matchLabels:
          name: api-pod # the api-pod will have rights to connect to db Pod on port 3306
    ports:
    - protocol: TCP
      port: 3306
  egress:
  - to:
    - ipBlock: # the address of external server
        cidr: 192.168.5.10/32
    ports:
      - protocol: TCP
        port: 3306