{
  "stack":{
    "comment":"Stack Definition defines where the artifacts need to be fetched from.""name":"hdp-1.0.1",
    "services":{
      "hadoop":{
        "version":1.0
      }
      "oozie":{
        "version":1.1
      }
    }
    "repository":{
      "comment":"Could be winpkg/tarball/others""type":yum,
      "info":{
        "key_1":"value_1",
        "url":"url"
      }
    }
  },
  "hosts":[
    "comment":"This can also be thought of as representation of hosts eg. small/medium/large""host_1",
    "host_2"
  ],
  "configuration":{
    "hadoop-env":{
      "HADOOP_CONF_DIR":"/etc/hadoop",
      "HADOOP_NAMENODE_OPTS":"-Dsecurity.audit.logger=INFO,DRFAS -Dhdfs.audit.logger=INFO,DRFAAUDIT",
      "HADOOP_CLIENT_OPTS":"-Xmx128m"
    },
    "core-site":{
      "fs.default.name":"hdfs://${namenode}:8020/",
      "hadoop.tmp.dir":"/grid/0/hadoop/tmp",
      "!hadoop.security.authentication":"kerberos",
      
    }
  },
  "services":{
    "comment":"Spec for which services need to be configured for a cluster and also service config properties",
    "hdfs":{
      "enabled":true,
      "user":"hdfs"
    }
    "mapred":{
      "user":"mapred",
      "enabled":false
    }
  },
  "roles":{
    "comment_1":"Configuration knobs that are host specific",
    "comment_2":"Also the host role mapping here can just be mapping to ec2/azure instance of small/large",
    "namenode":{
      "host":"host_1",
      "configuration":{
        "hdfs-site":{
          "dfs.https.enable":"true"
        }
      }
    }
  }
}