anchor.diff:  Periscope can work with any Hadoop 2/ YARN cluster provisioned with Apache Ambari, and supports any YARN application.
   
   ##Clusters [/clusters/{id}]
  -###Add a cluster to be monitored[POST]
  +###Add a cluster [POST]
   Add a Hadoop cluster to be monitored by Periscope. Note that Periscope does not require any pre-installation of components on cluster nodes. 
   To link a Hadoop cluster with Periscope the only required this is the Apache Ambari REST API endpoint.
   
  
positive.code: 
  
  ##Alarm [/clusters/{clusterId}/alarms]
  ###Get the alarms for a cluster [GET]
  
  + Parameters
      + clusterId (required String `clusterID`) ... The id of the cluster.
  
negative.code: 
  
  ##  Clusters [/clusters/{id}]
  ###Retrieve cluster information [GET]
  
  + Parameters
      + id (required String `id`) ... The id of the cluster.
  