code: func DecodeMetaInLabel(labels map[string]string) *types.EruMeta {
  	meta := &types.EruMeta{}
  	metastr, ok := labels[cluster.ERUMeta]
  	if ok {
  		if err := json.Unmarshal([]byte(metastr), meta); err != nil {
  			log.Errorf("[DecodeMetaInLabel] Decode failed %v", err)
  		}
  	}
  	return meta
  }
docs: // DecodeMetaInLabel get meta from label and decode it