[
  {
    "InstanceCount": 1,
    "InstanceGroupType": "MASTER",
    "InstanceType": "m1.large",
    "Name": "MASTER"
  },
  {
    "InstanceCount": 1,
    "InstanceGroupType": "CORE",
    "InstanceType": "m1.large",
    "Name": "CORE",
    "Configurations": [
      {
        "Classification": "hdfs-site",
        "Properties": {
          "test-key1": "test-value1",
          "test-key2": "test-value2"
        }
      }
    ]
  },
  {
    "InstanceCount": 1,
    "InstanceGroupType": "TASK",
    "InstanceType": "m1.large",
    "Name": "TASK"
  }
]
