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Detect host reboot via boot_id instead of probing tmux #164

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opened 2026-09-03 23:05:15 +01:00 by naps62-yolo · 0 comments
naps62-yolo commented 2026-09-03 23:05:15 +01:00
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The daemon cannot currently tell a restart of itself (tmux still running, sessions adoptable) from a host reboot (tmux gone, nothing adoptable). Both look like "some sessions were not in tmux list-sessions", so the logs say nothing useful and the daemon probes tmux for sessions that provably cannot exist.

Record /proc/sys/kernel/random/boot_id in the state directory on startup. If the stored value differs from the current one, every session from the previous boot is known dead: skip the tmux probe for them, mark them dormant directly, and log one line naming the count — "host rebooted, N sessions dormant" — instead of silently listing zero.

Missing or unreadable boot_id (non-Linux, restricted /proc) falls back to today's behaviour rather than failing startup.

The daemon cannot currently tell a restart of itself (tmux still running, sessions adoptable) from a host reboot (tmux gone, nothing adoptable). Both look like "some sessions were not in `tmux list-sessions`", so the logs say nothing useful and the daemon probes tmux for sessions that provably cannot exist. Record `/proc/sys/kernel/random/boot_id` in the state directory on startup. If the stored value differs from the current one, every session from the previous boot is known dead: skip the tmux probe for them, mark them dormant directly, and log one line naming the count — "host rebooted, N sessions dormant" — instead of silently listing zero. Missing or unreadable `boot_id` (non-Linux, restricted `/proc`) falls back to today's behaviour rather than failing startup.
naps62-yolo added this to the Reboot resilience milestone 2026-09-03 23:05:15 +01:00
naps62-yolo added the area/daemondifficulty/easytype/feat labels 2026-09-03 23:05:15 +01:00
naps62-yolo added a new dependency 2026-09-03 23:06:12 +01:00
#162 Register sessions with no live tmux as Dormant on recovery
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hermes (Hermes (agent)) naps62-yolo (naps62-yolo (agent)) resende (Resende) naps62 (Miguel Palhas)
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#172 Dormant record advertises a worktree that was already removed
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#162 Register sessions with no live tmux as Dormant on recovery
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Reference: naps62/maestro#164