Ubuntu Installer with custom Initrd

Hello everyone, we have run into an issue and would like to see how others in the community have solved a similar situation.

Some of our hardware will not work in the default Ubuntu installer, we have to build a custom ram disk. We have a CI job that will rebuild the ram disk for what we need, and I can manually copy it over to /var/lib/tftpboot/boot, but I’m certain that at some point it will get overwrote.

We have Katello deployed, and we mirror the upstream Ubuntu repo.