ALARM mirrors inconsistently serve .db.sig files — some mirrors return
404 for core.db.sig which aborts the pacstrap. SigLevel = Never is
standard practice for Docker-based archiso builds.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Three fixes for the 'vmlinuz-* not found' failure:
1. Override releng profile's pacman.conf to add [alarm] and [aur] repos.
linux-aarch64 lives in [alarm] — without this the kernel package was
silently missing from the airootfs and /boot was empty.
2. Remove linux.preset from releng airootfs (references vmlinuz-linux,
the x86_64 kernel name that doesn't exist on ALARM).
3. Add linux-aarch64.preset to the airootfs with an 'archiso' preset entry
(ALL_kver=/boot/vmlinuz-linux-aarch64, archiso_image=initramfs-linux-aarch64.img).
mkarchiso looks for this 'archiso' preset to build the live initramfs.
4. Switch customize_airootfs.sh from mkinitcpio -P to mkinitcpio -p linux-aarch64
so only the aarch64 preset runs (not the stale x86_64 linux preset).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
archiso is not in ALARM repos for aarch64 — pacstrap fails trying to
install it into the live ISO root. The Docker build environment already
has mkarchiso installed from source; the live ISO doesn't need it.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
nmemmertandClaude Sonnet 4.6