{
    "core": {
        "hostname": "<server name>",
        "ssh_keys": [
            "ssh-ed25519 AAAA..."
        ],
        "var_key": "<LUKS key>",
        "var_wipe": false
    },
    "drives": [
        {
            "devices": ["/dev/sda"],
            "key": "<LUKS key>",
            "name": "stuff",
            "wipe": false
        }
    ]
}