How to make a custom ISO image

One way to completely re-build custom images is to use a script like alpine-make-vm-image.

• If you want to make a customized installer, you need to create .default_boot_services which will cause mkinitfs to create the defaults for the live image.

An alternative

It's possible to commit and load ISO image customizations to and from disk.

Booting an ISO image with local customizations

• From a dedicated boot media, obviously.
• Directly_booting_an_ISO_file