[Kea-users] database backend + stork

[Darren Ankney]

Hi Vadim,

Stork does not yet support the configuration backend.  When you
perform subnet changes on the Stork server, it will send these changes
to Kea using the subnet_cmds hook API commands.  Then it will send a
config-write API command to save the configuration to disk.

Thank you,
Darren Ankney

On Wed, Dec 18, 2024 at 12:50 PM Vadim Yakovenko
<YakovenkoV at westmancom.com> wrote:
>
> Additional information:
>
> I can see the subnet is added to the running configuration, but still not committed to the database.
>
> ________________________________
> From: Vadim Yakovenko <YakovenkoV at westmancom.com>
> Sent: Wednesday, December 18, 2024 10:25 AM
> To: kea-users at lists.isc.org <kea-users at lists.isc.org>
> Subject: database backend + stork
>
> Hello.
>
> I am running the Kea 2.6.1 with premium hooks for database backend.
> Stork sever version is 2.0.0
>
> Here is the config snippet which was pulled from the server requested via kea-agent:
>
>         "config-control": {
>           "config-databases": [
>             {
>               "host": "AAA.AAA.AAA.AAA",
>               "name": "lab_lease_db",
>               "password": "xxx",
>               "port": 3306,
>               "type": "mysql",
>               "user": "connector"
>             }
>           ],
>
> Here is what I see from the Stork side for hooks:
>
> Libdhcp_host_cmds.so [doc]
> libdhcp_subnet_cmds.so [doc]
> libdhcp_cb_cmds.so [doc]
> libdhcp_mysql_cb.so [doc]
> libdhcp_lease_cmds.so [doc]
>
> Here is what I see from the Stork side for the backend:
>
>
> Database Backends
>  MySQL (lab_lease_db at AAA.AAA.AAA.AAA) with:
> Leases
> Config Backend
>
> So, it looks like I should be able to add and manipulate subnets and pools.
>
> When I'm trying to add a subnet I'm getting the following message:
>
> The transaction creating the subnet failed: Problem with committing subnet information: config-write command to kea at AAA.AAA.AAA.AAA failed: error status (1) returned by Kea dhcp4 daemon with text: 'Error during write-config: Unable to open file /etc/kea/kea-dhcp4.conf for writing'
>
> It looks like Kea is trying to write the config changes to the file, even though it should write it to the database.
> When I am adding the subnet to the database manually, Kea can operate with it without any problems.
> Have I missed something to setup ?
>
> Thanks in advance.
>
> -Vadim
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