code: func (s *Server) getRunningPods(request *restful.Request, response *restful.Response) {
  	pods, err := s.host.GetRunningPods()
  	if err != nil {
  		response.WriteError(http.StatusInternalServerError, err)
  		return
  	}
  	data, err := encodePods(pods)
  	if err != nil {
  		response.WriteError(http.StatusInternalServerError, err)
  		return
  	}
  	writeJSONResponse(response, data)
  }
docs: // getRunningPods returns a list of pods running on Kubelet. The list is
  // provided by the container runtime, and is different from the list returned
  // by getPods, which is a set of desired pods to run.