idrac_fan_control

This python/docker library is used for iDRAC and IPMI servers to control their fan speed based on CPU Temperatures

Fan Speed Calculation

For this package you can set a start temperature (START_TEMP) and end temperature (END_TEMP). When the system is below the START_TEMP then the START_FAN speed is applied to all fans. If you temperature is equal or above the END_TEMP then the END_FAN speed is applied to all fans.

Between these two points a linear gradient is used. The below graph shows how the fan speed changes with CPU temperature. The x axis is the temperature of the CPU and the y axis is the fan speed.

You should optimise these values in line with your CPU and other hardware specifications.

Docker Compose

services:
  idrac-fan-control:
    image: ghcr.io/benclark158/idrac_fan_control:latest
    container_name: idrac_fan_control
    restart: unless-stopped
    environment:
      - IPMI_HOST=<192.168.0.120> # also accepts DNS names
      - IPMI_USER=<root>
      - IPMI_PWD=<calvin>
      - START_TEMP=<40> # CPU temp in C
      - START_FAN=<0> # Fan speed in %
      - END_TEMP=<65> # CPU Temp in C
      - END_FAN=<60> # Fan speed in %
      - INTERVAL=<30> # default interval between checks in seconds
      - GET_CPU_UTIL=<true|false> # Should the CPU utilisation be output in the termal - this slows the loop - default False

Setup

You need to enable IPMI over the network for this container to work correctly.

Support

This extension has only been tested on Dell servers (specifically Dell R730xd), the functionality may be different for other brands or newer versions of IPMI/iDRAC.