update-initramfs produces a boot stub (~50 MB) that expects to mount a
separate rootfs over squashfs/disk/NFS. Our PXE channel only ships
vmlinuz+initrd.img, so the stub had nothing to pivot to — kernel
finished hand-off and the system wedged with firmware, modules, and
userspace stranded in the 545 MB rootfs dir we never delivered.
Replace with an everything-in-initramfs build: cpio.zst the full
rootfs (minus /boot) as the initrd, add /init -> sbin/init for the
kernel's runtime entrypoint, materialize the kernel symlink into a
real file. Bump check-initrd floor to 200 MB and switch the firmware
grep from unmkinitramfs (boot-stub-specific) to zstd | cpio -t.
Also add cpio to the CI apt deps.
Previous run actually built the 518 MB rootfs with firmware-misc-nonfree
et al. installed — the real payload is working. Two follow-ups:
- check-initrd was reading stat on a symlink path and getting 30 bytes
(the symlink's own size), not the 6.1.0-44-amd64 kernel initrd it
points to. Switched to wc -c, which follows symlinks, and to du -hL
for the OK message.
- Add zstd to Packages= so COMPRESS=zstd in initramfs.conf can be
honored; without it update-initramfs falls back to gzip with a
"No zstd in PATH" warning.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Previous attempt (c962d6d) added firmware-linux-nonfree to mkosi.conf,
but the CI bundle was still 63 MB and Tiger Lake wedged on tgl_guc.
Two reasons: (1) firmware-linux-nonfree on bookworm is a thin
metapackage that doesn't include firmware-misc-nonfree, which is where
i915 GuC/HuC blobs actually live; (2) Ubuntu's apt-packaged mkosi is
old enough that Repositories=non-free-firmware shorthand likely isn't
wired through to the debootstrap invocation, so firmware packages
silently miss the bootstrap step entirely.
Changes:
- Enumerate firmware packages explicitly in mkosi.conf (firmware-
misc-nonfree, firmware-iwlwifi, firmware-realtek, firmware-amd-
graphics, firmware-intel-sound, intel/amd64-microcode).
- Ship mkosi.sources.d/debian.sources with explicit deb822 so the
non-free-firmware component is unambiguously available.
- Install mkosi 24.3 via pip in CI instead of apt's older build.
- Pin MODULES=most and COMPRESS=zstd via a tracked initramfs-tools
config under mkosi.extra/.
- Narrow .gitignore so only the generated agent binary is ignored,
not the whole mkosi.extra/ tree.
- New check-initrd Makefile target asserts both size (>=150 MB) and
actual presence of i915/tgl_guc_*.bin inside the built initrd, so
a silent firmware-drop regression fails the build loudly.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
mkosi only mounts live-image/ as /work/src, so the postinst couldn't
reach the repo-root bin/vetting-agent.linux-amd64 — the build failed
in CI with `install: cannot stat '/work/src/bin/vetting-agent.linux-amd64'`.
The Makefile now copies the prebuilt agent into mkosi.extra/, which
mkosi merges into the image root automatically. The postinst is
reduced to creating the multi-user.target.wants symlink.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
josh