Kernel dropped to initramfs because root=LABEL=BF_ROOT_A in cmdline.txt
but the ext4 filesystem had no label set (pi-gen's default is unlabeled).
dd copies raw bytes — any label must be set on the standalone file BEFORE
writing into the output image.
Add e2label BF_ROOT_A on rootfs.ext4 + fatlabel BF_BOOT_A / BF_BOOT_B
on each bootfs copy after patching cmdline.txt but before dd.
losetup -fP partition scanning failed on CI runner ("failed to open
partition 1"). Rewrite to parse partition start/size from sfdisk -J
(JSON output) via jq, then dd with skip/seek at exact sector offsets.
Only uses losetup for individual file images (selector.vfat, rootfs,
bootfs) where partition scanning isn't needed.
Also: add jq to CI apt install, drop xz compression from -9 to -6
(faster, still ~85% ratio on rootfs), free source image earlier to
avoid disk exhaustion on runners with tight scratch.
Phase 2a of OS OTA: post-process pi-gen output into a RAUC-compatible
A/B layout. New deploy/rauc/repartition-image.sh:
- Decompresses the stock pi-gen 2-partition image
- Extracts bootfs (vfat) + rootfs (ext4) blobs
- Compacts rootfs with resize2fs -M and grows back with 25% headroom
- Patches /etc/fstab inside rootfs to use LABEL=BF_BOOT_A /
LABEL=BF_ROOT_A / LABEL=BF_DATA (slot-agnostic; RAUC re-labels per
slot on install)
- Stamps /etc/betterframe/{os-version,os-compatibility} for the kiosk's
os_update.rs to read at runtime
- Builds two bootfs copies, each with cmdline.txt root= rewritten to
the matching ROOT slot
- Lays out 6 GPT partitions: BF_BOOTSEL (autoboot.txt with tryboot
pointing at boot_partition=2 / [tryboot] boot_partition=3), BF_BOOT_A,
BF_BOOT_B, BF_ROOT_A (populated), BF_ROOT_B (empty, RAUC fills on
first install), BF_DATA
- Recompresses with xz -T0
build-bundle.sh now takes the already-extracted slot images so the
.raucb bundle re-uses the exact same blobs that ship inside the A/B
initial-flash image — no duplication, no drift.
CI wires the repartition step between pi-gen output and the GitHub
Release upload. Ships the A/B image (not the stock pi-gen one).
Also: bump Blacksmith binary builders from 2/4 vCPU to 8 vCPU each.
Image job stays on GitHub's ubuntu-24.04-arm (Blacksmith arm kernel
6.5 doesn't ship binfmt_misc as a loadable module, which pi-gen-action's
defensive modprobe step still requires).
What's still pending:
- In-image RAUC install (rauc package + drop system.conf + CA cert
at /etc/rauc/keyring.pem). Without this, the image boots A/B-laid-
out but rauc install commands have no daemon to talk to.
- Admin UI for OS releases + rollouts (task #4).
