ISC-DHCP is approaching end-of-engineering, but just in time for that, last week I merged an importer for UCI DHCPv4 configs that is mostly compatible with legacy ISC configs.
The only thing not yet supported is the ability to explicitly NAK a request for a lease if you have strict reservations. See:
which is the upstream issue. If you need this functionality, please upvote it upstream.
That said, there’s also capabilities that Kea has that ISC-DHCP lacked, so if you want UCI support for those added, call it out by filing an issue.
Lastly, per Stijn’s request, the Bind DNS integration is its own subpackage as well.
If you want to do split-horizon of your domain internally and populate it with RR’s to match the DHCP A/PTR RR’s (and CNAME and SRV and MX and…) this subpackage supports that. It’s actually really handy and I’ve carried it over from ISC-DHCP.