{
  "instance1.example.com": {
    "template": "drbd",
    "os": "debootstrap",
    "disk_size": ["25G"],
    "ram_size": 512
  },
  "instance2.example.com": {
    "template": "plain",
    "os": "debootstrap",
    "disk_size": ["100G"],
    "ram_size": 512
  }
}