[Kea-users] Kea-DHCP4 HA-Maintenance and Hub-and-Spoke configuration

[Marcin Siodelski]

Carsten
The following chapter: 
https://kea.readthedocs.io/en/kea-3.0.0/arm/hooks.html#controlled-shutdown-and-maintenance-of-dhcp-servers 
explains that:

"If the server has many relationships with different partners, the 
ha-maintenance-start command attempts to transition all of the 
relationships into the partner-in-maintenance state by sending 
ha-maintenance-notify to all partner servers. If this step fails for any 
server, an error is returned. If that happens, the ha-maintenance-cancel 
command can be used to resume normal operations and fix the issue."

Marcin Siodelski
ISC

On 9.07.2025 17:20, Carsten Strotmann via Kea-users wrote:
> Hi,
>
> the API command "ha-maintenance-start" will set the partner DHCP server into maintenance state.
>
> So the command is usually being send to the machine that should "take over" the whole DHCP service.
>
> How does this work in an hub-and-spoke configuration.
>
> When an "ha-maintenance-start" command is send (via the kea-ctrl-agent) to the central "hub" machine, holding many different HA-relationships with "spoke" DHCP servers, will it set all "spoke" DHCP servers into maintenance?
>
> If yes, will it be possible to just set one HA-relationship into maintenance mode?
>
> Greetings
>
> Carsten