homelab-configs/monitoring/prometheus-offhost-watchdog/prometheus-watchdog.timer at 250fea8679d94716fbcc76f58cb50bdfbc629d22 - homelab-configs - Tommy's Homelab Git

tommy/homelab-configs

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tommy 6af09ef9c6 monitoring: off-host Prometheus dead-man's-switch watchdog (Pi .227)

Independent-hardware systemd timer on raspberrypi (.227) probing media-server
Prometheus /-/healthy every 60s; pages ntfy prometheus-critical after 3 fails
and on recovery. Catches media-server-dark, which the same-host Uptime-Kuma
monitor structurally cannot. Deployed + live-outage tested 2026-06-30.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-30 21:58:57 -05:00

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SYSTEMD

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 [Unit]
 Description=Run Prometheus watchdog every minute
 [Timer]
 OnBootSec=2min
 OnUnitActiveSec=60s
 AccuracySec=5s
 [Install]
 WantedBy=timers.target