overview of kubernetes port definitions

service.yaml

kind: Service
apiVersion: v1
metadata:
  name: port-example-svc
spec:
  # Make the service externally visible via the node
  type: NodePort 

  ports:
    # Which port on the node is the service available through?
    - nodePort: 31234

    # Inside the cluster, what port does the service expose?
    - port: 8080

    # Which port do pods selected by this service expose?
    - targetPort: 

  selector:
    # ...