39 lines
1.6 KiB
Markdown
39 lines
1.6 KiB
Markdown
# 2026-09-18 — koopa as external amanita probe logger
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## Why
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Amanita hard hangs leave no panic; internal heartbeat stops with the box.
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External ICMP+SSH from **koopa** records last-alive independently so hang vs
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power/PSU can be separated after the next freeze.
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## Live (hernani@koopa)
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| Piece | Detail |
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|-------|--------|
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| Key | `~/.ssh/id_ed25519_amanita_probe` — fingerprint `SHA256:R2i2nZfI1svR6Ts3DaSw5eZj2fvnGgm1R9PoMFS4Jj0` |
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| SSH Host | `amanita-probe` → `vx@192.168.100.6`, IdentityFile that key only |
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| Script | `~/.local/bin/koopa-amanita-probe` (SoT: `scripts/amanita-probe/`) |
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| Timer | user `koopa-amanita-probe.timer` ~15 s, linger yes |
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| Log | `~/.local/state/amanita-probe/amanita-probe.{log,last,meta}` — owned by hernani, mode 644 |
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## amanita vx (only)
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Restricted `authorized_keys` line (not on root):
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```text
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from="192.168.100.95",no-agent-forwarding,no-port-forwarding,no-X11-forwarding,no-pty,command="/bin/cat /var/lib/amanita/heartbeat.last" ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBeMenvp0D9EarfAEUtu49Q7bCbGhw+R/E1nJPQSSmZc koopa-amanita-probe@hernani-koopa
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```
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Forced command only cats the world-readable HB mirror. No shell, no agent/X11/port forward.
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## Verify (2026-09-18 ~15:09 CEST)
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- `systemctl --user is-active koopa-amanita-probe.timer` → active
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- `ssh amanita-probe` → EXIT 0, one HB line
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- meta: `icmp=ok ssh=ok gap_s≈15`
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- hernani can read the probe log dir on koopa (owner)
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## Docs / install
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`scripts/amanita-probe/README.md` + `install-amanita-probe.sh`.
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Do **not** put this key on root AK; do **not** bare `modprobe ramoops`.
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