apollo-configservice/src/main/java/com/ctrip/framework/apollo/metaservice/service/KubernetesDiscoveryService.java/KubernetesDiscoveryService/getServiceInstances
class KubernetesDiscoveryService:  @Override
  public List<ServiceDTO> getServiceInstances(String serviceId) {
    String configName = SERVICE_ID_TO_CONFIG_NAME.get(serviceId);
    if (configName == null) {
      return Collections.emptyList();
    }

    return assembleServiceDTO(serviceId, bizConfig.getValue(configName));
  }