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fan-control: merge Fan %/RPM dashboard cards + RPM estimate fallback [ci skip]

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The Fan % and Fan RPM sensor-graph cards had identical trend shapes (RPM ∝ %),
so merge them into one "Fan speed" card: % trend (stable Pushgateway sensor) +
RPM beneath. RPM reads sensor.r730_fan_speed (Redfish) but falls back to the
calibrated estimate (rpm≈160·%+1520, shown with a "~" prefix) when that sensor
is unavailable — it blips out intermittently, so the readout never goes blank.
The Override readout likewise shows both "% · rpm". HA-side only; daemon
unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Viktor Barzin 2026-06-05 14:31:32 +00:00
parent 722a1c9b42
commit 6442978f07
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docs/runbooks/fan-control.md
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@ -43,7 +43,12 @@ is applied within one daemon loop (~15 s).
Monitoring sensors on the same view: `sensor.r730_fan_speed` (redfish exporter),
`sensor.r730_fan_control_target` + `sensor.r730_fan_control_mode` +
`sensor.r730_fan_power_est` (Pushgateway). `r730_fan_power_est` is an ESTIMATE of
`sensor.r730_fan_power_est` (Pushgateway). Fan **% and RPM are merged into one
"Fan speed" card** (the two had identical trend shapes) — the % trend comes from
the stable Pushgateway sensor, while RPM reads `sensor.r730_fan_speed` but **falls
back to a calibrated estimate (shown with a `~` prefix) whenever the Redfish
sensor is `unavailable`** (it blips out intermittently), so the readout never goes
blank. `r730_fan_power_est` is an ESTIMATE of
total fan power (the iDRAC reports no per-fan power) — modelled from RPM via the
fan affinity law (∝ RPM³), calibrated to the power sweep (~2 W floor → ~99 W full).