apollo-configservice/src/main/java/com/ctrip/framework/apollo/metaservice/service/KubernetesDiscoveryService.java/KubernetesDiscoveryService/assembleServiceDTO
class KubernetesDiscoveryService:  private List<ServiceDTO> assembleServiceDTO(String serviceId, String directUrl) {
    if (Strings.isNullOrEmpty(directUrl)) {
      return Collections.emptyList();
    }
    List<ServiceDTO> serviceDTOList = Lists.newLinkedList();
    COMMA_SPLITTER.split(directUrl).forEach(url -> {
      ServiceDTO service = new ServiceDTO();
      service.setAppName(serviceId);
      service.setInstanceId(String.format("%s:%s", serviceId, url));
      service.setHomepageUrl(url);
      serviceDTOList.add(service);
    });

    return serviceDTOList;
  }