optional int32 port = 3;

  // Number or name of the port to access on the pods targeted by the service.
  // Number must be in the range 1 to 65535. Name must be an IANA_SVC_NAME.
  // If this is a string, it will be looked up as a named port in the
  // target Pod's container ports. If this is not specified, the value
  // of the 'port' field is used (an identity map).
  // This field is ignored for services with clusterIP=None, and should be