Re:Another free CA as an alternative to Let's Encrypt
by snowzach on Friday August 20, 2021 @05:53PM
(#28251837)
I run this one: https://github.com/joohoi/acme-dns
It's super simple and has a REST API for updating records.
But what you are suggesting should work just fine aswell - there should be no need for a persistent service. Of course the service would need to run on port 53, so you actually cannot have another nameserver on that machine already, and also require CAP_NET_BIND_SERVICE .
A quick search lead me to this python project that could be an inspiration: https://github.com/pawitp/acme-dns-server