code: function _getClusterState() {
          return k8s.list('app=teraslice', 'pods')
              .then(k8sPods => k8sState.gen(k8sPods, clusterState, clusterNameLabel))
              .catch((err) => {
                  // TODO: We might need to do more here.  I think it's OK to just
                  // log though.  This only gets used to show slicer info through
                  // the API.  We wouldn't want to disrupt the cluster master
                  // for rare failures to reach the k8s API.
                  logger.error(err, 'Error listing teraslice pods in k8s');
              });
      }
docs: Creates clusterState by iterating over all k8s pods with the label
  `app=teraslice`
  @constructor
  @return      {Promise} [description]