Confirmed on real hardware: kexec's device_shutdown() pass runs (SCSI disks
sync fine in the log) then the machine goes dark for good — journalctl
--list-boots showed a ~15min gap before the next boot, a genuine hang needing
a manual power cycle, not a slow jump. Near-certainly amdgpu (RX 6800 XT):
discrete AMD GPUs are known to hang during kexec's device-shutdown pass with
no clean handoff before the jump, same class of issue as jupiter's
reboot=pci warm-reboot workaround, just fatal here instead of slow.
README's terra install section now leads with the USB installer path instead
(build ISO, dd to USB, rsync the repo over, disko + nixos-install locally).
CLAUDE.md's gotchas list gets the same warning. installer-iso is renamed from
jupiter-installer to homelab-installer since it's genuinely host-agnostic,
and now ships git.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
kexec-local could never actually jump. nixos-images' kexec-run.sh ends with
`nohup sh -c "sleep 6 && $SCRIPT_DIR/kexec -e" &` and returns immediately, so
the EXIT trap's `rm -rf "$stage"` deleted the kexec binary out from under the
sleeping shell. The box stayed on the old kernel and it looked like a slow boot.
Clear the trap before jumping, verify /sys/kernel/kexec_loaded, then sleep past
the timer.
Preflight everything before the point of no return, since this jumps the machine
you are typing at: CONFIG_KEXEC, kernel lockdown, exec-capable staging dir, free
space, RAM vs image size, and that the tarball holds all five expected files.
Stage on /var/tmp rather than /tmp because kexec-run.sh appends to initrd in
place and execs from that directory. sync before jumping (kexec -e skips
unmount). Confirmation prompt naming the host, since run in the wrong terminal
this kexecs the laptop; --yes skips it.
Drop the ssh-keygen -R added to the remote kexec path: kexec-run.sh copies
/etc/ssh/ssh_host_* into the appended initrd and restore-remote-access.nix
installs them back, so the host key survives the jump.
Proton Pass items are now keyed by <config> instead of <host>, since the address
is incidental and the config name is stable. kexec therefore takes <config>
<host>. Resolve titles among --filter-state active items first: a trashed item
with the same title shadowed the active one and returned an empty password,
which is indistinguishable from "no entry" and silently fell back to prompting
(hit on darman@neptun).
Other fixes: replace `ls glob | head -1` (returns empty with exit 0 on no match)
with a helper that dies; guard against untracked hosts/<config> since flakes
ignore untracked files; feed the sudo password more than once under setsid;
handle empty arrays under set -u; tolerate empty FSTYPE in the SD-card root
partition lookup; preflight zstdcat/dd/lsblk before the destructive dd; list
image and flash in the usage strings.
Add checks.x86_64-linux.kexec-local, a VM test driving the real script. It is
the only way to exercise kexec-local, which cannot be rehearsed on hardware. It
asserts the box left the old kernel, returned as nixos-installer, lost its old
/run, and kept its ssh host key. HOMELAB_KEXEC_TARBALL lets it reuse a prebuilt
installer instead of building ~500MB inside the guest.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Group service modules by category (media, network, vpn, identity,
dev, desktop) to make the growing services/ dir easier to navigate.
containers.nix stays at the top level since it's a shared backend,
not a single-category service.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
darmanandClaude Sonnet 5