k3s/examples/mysql-wordpress-pd/mysql-service.yaml

apiVersion: v1
kind: Service
metadata: 
  labels: 
    name: mysql
  name: mysql
spec: 
  ports:
    # the port that this service should serve on
    - port: 3306
  # label keys and values that must match in order to receive traffic for this service
  selector: 
    name: mysql