On 7/9/25 08:58, David via Kea-users wrote:
I am working on a project that up until now has been using dnsmasq. It
can map a hostname to an IP address with this kind of entry:
dhcp-host=server_name.domain.local,10.1.0.50
dnsmasq cannot do HS or redundancy easily, so I was asked to check Kea.
I’m using version 2.6.3 from the RHEL 9.6 repository. (Using anything
else than what is in the official repo causes heartburn with
management.) I have Kea HA working and it works fine.
Q1: Can Kea match a hostname to a IP address in a reservation? Doesn’t
seem like it can.
The DHCP clients are Linux based. As they are OpenShift VMs, the MAC
addresses are randomly assigned so I can’t use MAC addresses.
Thanks.
*David Pearce*
*Systems Administrator*
*Space and Airborne Systems / l3HARRIS Technologies, INC.*
L3Harris.com <mailto:L3Harris.com> / david.pea...@l3harris.com
<mailto:david.pea...@l3harris.com>
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Ideally the clients would use a persistent client ID to allow
identifying them even when their MAC address changes. This could then
be used for the host reservations.
It's definitely not recommended, but one could abuse the flex-id hook to
use any part of the DHCP packet to identify the client. I'll leave it
as an exercise to the reader to figure out how to do that for this purpose.
(It's not recommended in this case because the sent hostname is of
course completely controlled by the client, and so a malicious client
could steal another client's lease by using the same hostname. Most
environments do not have complete control over all their clients, so
this could be problematic.)
-Doug
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