64 lines
1.9 KiB
Nix
64 lines
1.9 KiB
Nix
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{ config, lib, pkgs, ... }:
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{
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systemd.timers."fancontrol" = {
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar="*:0/3";
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Unit = "fancontrol.service";
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};
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};
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systemd.services."fancontrol" = {
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environment = {
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TEMP_MIN_FALLING = "50";
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TEMP_MAX_RISING = "56";
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TEMP_CRIT = "70";
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LOW_FAN_SPEED = "0x10";
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};
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script = ''
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SET_FAN_MANUAL="0x30 0x30 0x01 0x00" # Enable manual control
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SET_FAN_AUTO="0x30 0x30 0x01 0x01" # Disable manual control
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SET_FAN_LOW="0x30 0x30 0x02 0xff $LOW_FAN_SPEED"
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SET_FAN_MAX="0x30 0x30 0x02 0xff 0x64" # force 100%
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# Get all temperatures readings starting with "Temp ", find all two digit numbers followed by spaces, find the largest one, trim the trailing space
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maxcoretemp=$(${pkgs.ipmitool}/bin/ipmitool sdr type temperature | grep '^Temp ' | grep -Po '\d{2} ' | sort -nr | head -n1 | xargs)
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# Verify that we read a valid number
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ISNUMBER='^[0-9]+$'
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if ! [[ $maxcoretemp =~ $ISNUMBER ]] ; then
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echo "Error: could not read temperature" >&2
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exit 2
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fi
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echo "Highest measured CPU temperature: '$maxcoretemp'"
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if [ "$maxcoretemp" -gt "$TEMP_CRIT" ]; then
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echo "TOO HOT, CRITICAL CPU TEMP"
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${pkgs.ipmitool}/bin/ipmitool raw $SET_FAN_MANUAL
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${pkgs.ipmitool}/bin/ipmitool raw $SET_FAN_MAX
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exit 1
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fi
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if [ "$maxcoretemp" -gt "$TEMP_MAX_RISING" ]; then
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echo "TOO HOT, switching to IDRAC fan controL"
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${pkgs.ipmitool}/bin/ipmitool raw $SET_FAN_AUTO
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exit 0
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fi
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if [ "$maxcoretemp" -lt "$TEMP_MIN_FALLING" ]; then
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echo "Sufficiently cooled, stepping down fans"
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${pkgs.ipmitool}/bin/ipmitool raw $SET_FAN_MANUAL
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${pkgs.ipmitool}/bin/ipmitool raw $SET_FAN_LOW
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exit 0
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fi
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echo "Temperature is between limits, doing nothing..."
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'';
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};
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}
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