mongo-networkpolicy.yaml

# This is the network policy for MongoDB to secure the MongoDB pod. I created an ingress policy that only allows incoming traffic from 
# the backend pod to the MongoDB pod. This means that only the backend pod can communicate with the MongoDB pod, 
# preventing any other pods from establishing a connection.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: network-policy-for-mongodb
spec:
  podSelector:
    matchLabels:
      role: mongodb
  policyTypes:
  - Ingress
  ingress:
  - from:
    - podSelector:
        matchLabels:
          role: node-backend
    ports:
    - protocol: TCP
      port: 27017