ambari/ambari-web/app/assets/data/clusters/info.json

{
  "href" : "http://ambari:9998/clusters",
  "items" : [
    {
      "href" : "http://ambari:9998/clusters/mycluster",
      "Clusters" : {
        "cluster_name" : "mycluster",
        "version" : "HDP-1.2.2"
      }
    }
  ]
}