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ergosteurandClaude Opus 5
00384e7463
Manual fan mode pins the fans at a fixed duty and never ramps, so a sustained load had no cooling response until the BMC's own critical-temperature override stepped in. docker-idrac.sh solved that, but needs Docker, which is not installed on the host. ipmi-fancontrol-daemon polls the CPU sensors and switches between the fixed duty and the BMC's automatic curve around a threshold, which is what that container did. Measured on the host: 1440 RPM pinned versus roughly 4200 RPM on the automatic curve at the same 60C. - Hysteresis, default 5C, stops the fans oscillating at the boundary. - An unreadable temperature fails safe to automatic rather than staying pinned. - SIGTERM restores the automatic curve, with ExecStopPost as the backstop for an outright kill. Default to the local "open" interface. It needs no credentials and no network, which matters for the shutdown path, where lanplus to the iDRAC could fail once networking is down. ipmi-fancontrol-auto and -manual honour the same setting and stay available for ad-hoc use. Enable the third-party PCIe cooling response suppression that docker-idrac.sh was configured with, so the automatic curve is not held to a raised floor by the aftermarket NICs. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
20 lines
593 B
Desktop File
20 lines
593 B
Desktop File
[Unit]
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Description=Temperature-aware IPMI fan control
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Documentation=file:/opt/ergosteur/ipmi-fancontrol-daemon
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# Only needed when conf sets IPMI_INTERFACE=lanplus; harmless for the local
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# "open" interface.
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=simple
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ExecStart=/opt/ergosteur/ipmi-fancontrol-daemon
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# The daemon restores the automatic curve on SIGTERM. This is the backstop for
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# the case where it is killed outright and its trap never runs.
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ExecStopPost=/opt/ergosteur/ipmi-fancontrol-auto
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Restart=always
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RestartSec=10
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[Install]
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WantedBy=multi-user.target
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