Hi Joop,
On 17 Dec 2025, at 11:29, Joop Boonen wrote:
> Dear all,
>
> I didn't find any option to implement dynamic host-names in kea pool.
>
> Like this in isc dhcpd.
>
> subnet 172.26.250.0 netmask 255.255.254.0 {
> set machex = binary-to-ascii(16, 8, "", substring(hardware, 1, 6));
> set macsuffix = suffix(machex, 6);
> set hstnm = concat("vm-", macsuffix);
> option host-name = hstnm; # Option 12
> -->8--
>
> i.e.
>
> pool {
> range 172.26.250.64 172.26.251.250;
> set machex = binary-to-ascii(16, 8, "", substring(hardware, 1, 6));
> set macsuffix = suffix(machex, 6);
> set hstnm = concat("vm-", macsuffix);
> option host-name = hstnm; # Option 12
> -->8--
>
> Does anyone know if this is possible, in kea?
>
Yes, it is possible, even via multiple ways:
1)
via DDNS-Tuning, see the examples at
https://kea.readthedocs.io/en/stable/arm/hooks.html#libdhcp-ddns-tuning-so-ddns-tuning
2)
via flexible-options (the expression below is build based on your ISC-DHCP
code, I've not tested it):
{
"library": "libdhcp_flex_option.so",
"parameters": {
"options": [
{
"name": "host-name",
"supersede":
"concat("vm-",substring(hexstring(option[host-name].hex,""),-1,6))",
"csv-format": true
},
]
}
},
Greetings
Carsten
--
ISC funds the development of this software with paid support subscriptions.
Contact us at https://www.isc.org/contact/ for more information.
To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
[email protected]
