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28da46a764
gates / gates (push) Successful in 2m54s
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS
57 lines
2.6 KiB
Bash
57 lines
2.6 KiB
Bash
#!/bin/bash
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# Kernel-lane spike (R-836, `09` §3 decision 164) — set up on a Proxmox host WITHOUT rebooting. Reversible: spike-undo.sh.
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# Usage: spike-setup.sh <old-kver> <new-kver> e.g. spike-setup.sh 7.0.2-6-pve 7.0.14-20-pve
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set -euo pipefail
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OLD=$1 NEW=$2
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ROOTUUID=$(findmnt -n -o UUID /)
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ESPUUID=$(findmnt -n -o UUID /boot/efi)
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ROOTDEV=$(findmnt -n -o SOURCE /)
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ADV="gnulinux-advanced-$ROOTUUID"
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[ -f /etc/default/grub.felhom-spike-orig ] || cp -p /etc/default/grub /etc/default/grub.felhom-spike-orig
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# 1. the OLD kernel is the default (an install of a new kernel made the NEW one default — R-836)
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sed -i "s|^GRUB_DEFAULT=.*|GRUB_DEFAULT=\"$ADV>gnulinux-$OLD-advanced-$ROOTUUID\"|" /etc/default/grub
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# 2. candidate 2: a one-shot flag in a GRUB environment block on the ESP (vfat — GRUB can rewrite it in place)
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grub-editenv /boot/efi/EFI/proxmox/felhom-oneshot.env create
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cat > /etc/grub.d/01_felhom_oneshot <<SNIP
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#!/bin/sh
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cat <<'G'
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# felhom kernel-lane spike: a one-shot default read from (and cleared in) an env block on the ESP
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insmod part_gpt
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insmod fat
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search --no-floppy --fs-uuid --set=felhom_esp $ESPUUID
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if [ -f (\$felhom_esp)/EFI/proxmox/felhom-oneshot.env ]; then
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load_env -f (\$felhom_esp)/EFI/proxmox/felhom-oneshot.env felhom_next
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if [ "\${felhom_next}" ]; then
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set default="\${felhom_next}"
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set felhom_next=
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save_env -f (\$felhom_esp)/EFI/proxmox/felhom-oneshot.env felhom_next
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fi
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fi
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G
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SNIP
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chmod 0755 /etc/grub.d/01_felhom_oneshot
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# 3. the test entries: the NEW kernel healthy, and two simulated hangs before userspace (no init → kernel panic)
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entry() { # id title extra-cmdline
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cat <<G
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menuentry '$2' --id $1 {
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insmod gzio
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insmod part_gpt
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insmod lvm
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insmod ext2
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search --no-floppy --fs-uuid --set=root $ROOTUUID
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linux /boot/vmlinuz-$NEW root=$ROOTDEV ro quiet $3
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initrd /boot/initrd.img-$NEW
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}
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G
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}
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{ echo '#!/bin/sh'; echo "cat <<'G'"
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entry felhom-spike-good "felhom spike: $NEW healthy" "panic=10"
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entry felhom-spike-panic "felhom spike: $NEW, panic, restart 10s" "rdinit=/felhom-spike-no-rdinit init=/felhom-spike-no-init panic=10"
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entry felhom-spike-freeze "felhom spike: $NEW, panic, NO restart" "rdinit=/felhom-spike-no-rdinit init=/felhom-spike-no-init panic=0"
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echo G; } > /etc/grub.d/41_felhom_spike
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chmod 0755 /etc/grub.d/41_felhom_spike
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update-grub 2>&1 | tail -2
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grub-script-check /boot/grub/grub.cfg && echo "grub.cfg syntax OK"
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grep -n 'felhom_next\|felhom-spike-\|^set default' /boot/grub/grub.cfg | head -20
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grub-editenv /boot/efi/EFI/proxmox/felhom-oneshot.env list; echo "(env listed above; empty = no one-shot)"
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