[Kea-users] vendor specific dhcp4 options from database

[Darren Ankney]

Hi Richard,

You can certainly try to edit the data in the database yourself.  You
still need to tell Kea how to retrieve it though.

Perhaps I misunderstood here, but if you are not storing these options
inside of host reservations, then you will need the configuration
backend: https://kea.readthedocs.io/en/kea-2.2.0/arm/dhcp4-srv.html#configuration-backend-in-dhcpv4
to load the options.

There are three ways to use the database in Kea: Leases (where lease
assignments by Kea are stored), hosts (where you can store host
reservations and associated data), and most of the configuration
(where part or most of the configuration is stored in the database).
You don't currently (or at least in the configs sent in your first
message) have a part of your configuration loading things that you've
setup in the configuration backend.  This doesn't apply if you're
storing the option data as part of a host reservation.  Then the
hosts-database directive you have is enough.  I couldn't easily tell
what you were doing for sure from the mysql dump you sent and I don't
easily have the ability, at the moment, to restore it to have a look..

Thank you,

Darren Ankney

On Sat, Apr 1, 2023 at 7:41 AM Richard Kojedzinszky <richard at kojedz.in> wrote:
>
> Dear Darren,
>
> Thanks for your reply. I could not find any clues in documentation that
> my setup should not work. In
> https://kea.readthedocs.io/en/kea-2.2.0/arm/config.html#cb-limitations
> there is paragraph beginning with this statement:
>
> Although it is not recommended, it is possible to specify certain
> parameter types both in a configuration file and the database.
>
> I expected that I can specify option definitions in configuration file,
> which is static, and I just wanted to place dynamic data in database,
> e.g. option-data parameters.
>
> Thanks,
> Richard
>
> 2023-03-31 23:02 időpontban Darren Ankney ezt írta:
> > Hi Richard,
> >
> > You would need to load the cb_cmds hook to manage the option-def and
> > option-data in the database
> > (https://kea.readthedocs.io/en/kea-2.2.0/arm/hooks.html#cb-cmds-configuration-backend-commands)
> > using the API commands.  You also need to connect to the database for
> > configuration backend
> > (https://kea.readthedocs.io/en/kea-2.2.0/arm/dhcp4-srv.html#configuration-backend-in-dhcpv4)
> > so that it can load the configuration containing the options from the
> > database for use.
> >
> > I saw neither of these things in your config file.
> >
> > Thank you,
> >
> > Darren Ankney
> >
> > On Fri, Mar 31, 2023 at 2:33 PM Richard Kojedzinszky via Kea-users
> > <kea-users at lists.isc.org> wrote:
> >>
> >> Dear users,
> >>
> >> I would like to define vendor specific options in database, howewer I
> >> dont succeed. If I define it in the config file, it works. I am
> >> attaching
> >> kea-dhcp4.static.conf for static and working configuration, and
> >> attaching kea-dhcp4.dyn.conf and database.dump.sql with relevant
> >> records
> >> only. Non-vendor options appear well in the reply packets, howewer
> >> options in space ipxe dont.
> >>
> >> Can somebody help me what am I doing wrong?
> >>
> >> Thanks in advance,
> >> Richard--
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