[Kea-users] libdhcp_subnet_cmds and database insert

[Darren Ankney]

Hello,

Using the configuration backend
(https://kea.readthedocs.io/en/stable/arm/dhcp6-srv.html#dhcp6-cb)
requires loading two hooks:

- libdhcp_cb_cmds.so
(https://kea.readthedocs.io/en/stable/arm/hooks.html#libdhcp-cb-cmds-so-configuration-backend-commands)
which provides the API commands necessary to manage the configuration
in the database.
- and one of libdhcp_mysql.so
(https://kea.readthedocs.io/en/stable/arm/hooks.html#libdhcp-mysql-so-database-backend-for-mysql)
or libdhcp_pgsql.so
(https://kea.readthedocs.io/en/stable/arm/hooks.html#libdhcp-pgsql-so-database-backend-for-postgresql)
depending on which database server software you use.

Thank you,
Darren Ankney

On Tue, Nov 18, 2025 at 6:44 PM Marcin Jurczuk <spock at omegastar.eu> wrote:
>
> Hi,
> I read basically all documentation about libdhcp_subnet_cmds hook and I still can't figure out how to force system to puth subnet config to database.
> hosts_cmds have this option  called "operation-target" that allows you to define where config should be stored. It is not mentioned in subnet hook.
> I'm able to insert network to config file(after API call to write cfg) but not to db.
> What is operation-target equivalent or how force kea do save subnet to database.
>
> Thanks in advance.
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