machine_setup/ansible/roles/jail_nat_dhcp/files/kea-dhcp4.conf

{
    "Dhcp4": {
        "interfaces-config": {
            "interfaces": [ "jailnat_dhcp" ]
        },
        "subnet4": [
            {
                "subnet": "10.215.1.0/24",
                "pools": [ { "pool": "10.215.1.10-10.215.1.200" } ],
                "option-data": [
                    {
                        "name": "routers",
                        "data": "10.215.1.1"
                    }
                ],
                "reservations": [
                    {
                        "hw-address": "d6:19:4c:68:fc:c7",
                        "ip-address": "10.215.1.201"
                    }
                ]
            }
        ],
        "option-data": [
            {
                "name": "domain-name-servers",
                "data": "10.215.1.1"
            }
        ]
    }
}