infra/docs/architecture
Viktor Barzin fd77c0dc4f
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monitoring: RpiSofiaUndervoltage alerts on new brown-out, not until reboot
The rpi-sofia under-voltage alert keyed off the sticky firmware bit
(rpi_under_voltage_occurred == 1), which latches on the first brown-out and
stays 1 until the Pi reboots. With alert-on-change routing it re-paged on every
boot cycle and sat firing for ~211h of the last 14d — Viktor reported "getting a
few of these lately" — and it disagreed with the HA-sofia dashboard, which shows
the live state and reads OK once voltage recovers.

Can't just switch to the live bit: rpi_under_voltage_now never registered once in
14d (brown-outs are sub-second and fall between the 1-min textfile-collector
samples), so the sticky bit is the only reliable detector.

Fix: edge-trigger on a NEW latch via increase(rpi_under_voltage_occurred[1h]) > 0.
Fires once per brown-out and auto-resolves ~1h later (~2h active over the same
14d instead of ~211h); counter-reset handling makes a clean reboot a no-op. Both
real brown-out events in the window are still caught. Docs updated in the same
commit (monitoring.md).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-19 08:45:39 +00:00
..
agent-task-tracking.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
authentication.md feat(authentik): TripIt external self-signup group + forward-auth fence (ADR-0020) 2026-06-15 21:48:04 +00:00
automated-upgrades.md k8s-version-upgrade: move detection to nightly 23:00 UTC (overnight upgrades) 2026-06-17 18:16:32 +00:00
backup-dr.md monitoring: VzdumpBackup{Stale,NeverRun,Failing} alerts for the new VM-image backup 2026-06-10 09:10:46 +00:00
chrome-service.md tripit: enable live flight-fare scrape via shared chrome-service CDP 2026-06-11 14:23:53 +00:00
ci-cd.md docs: ghcr_pull_token is now a scoped read:packages PAT, not the admin alias 2026-06-15 20:19:17 +00:00
compute.md apply-mbps-caps: compare normalized option sets (true idempotency) + devvm I/O-stall post-mortem [ci skip] 2026-06-11 18:00:08 +00:00
databases.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
dns.md pfsense: SNI-routed internal 443 — mail.viktorbarzin.me serves webmail everywhere 2026-06-10 18:41:07 +00:00
homepage.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
incident-response.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
llama-cpp.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
mailserver.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
monitoring.md monitoring: RpiSofiaUndervoltage alerts on new brown-out, not until reboot 2026-06-19 08:45:39 +00:00
multi-tenancy.md workstation: per-user playwright browser MCP for all users, reproducible from git 2026-06-16 20:33:47 +00:00
networking.md cloudflared: disable in-place autoupdate (--no-autoupdate) 2026-06-10 21:00:05 +00:00
overview.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
secrets.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
security.md claude-breakglass: in-cluster warm break-glass UI for the devvm 2026-06-12 21:40:17 +00:00
storage.md docs: sync compute/storage/proxmox-inventory with live state (memory audit) [ci skip] 2026-06-11 17:50:43 +00:00
vpn.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00
wave1-egress-observation-2026-05-22.md fix: restore tree dropped by 6d224861; land stem95su gdrive-sync (10m) [ci skip] 2026-06-09 08:45:33 +00:00