ipmi_adjust_fans.sh

#!/bin/bash
# Custom IPMI Fan control script for speed overrides to prevent premature hurricanes
# Run this every 30s or 60s in Cron
# Tested on Dell R730 and HP DL380P gen8

# Read the max CPU temp from sensors (lm-sensor) 
tempCpu=$(sensors|grep "high"|cut -d "+" -f2|cut -d "." -f1|sort -nr|sed -n 1p)
# Define CPU limit

# Set access vars
host=$(ipmitool mc getsysinfo delloem_url | awk -F[/:] '{print $4}')
user="ipmi_user"
password="ipmi_password"

echo "Accessing IPMI at host ${host} with user ${user}"

# Define low/med/high temp 
minCpu="50"
medCpu="56"
maxCpu="61"

if [ $tempCpu -le $minCpu ] ; then
	# Set to 3200 RPM
	ipmitool -I lanplus -H $host -U $user -P $password raw 0x30 0x30 0x01 0x00 >> /dev/null
	ipmitool -I lanplus -H $host -U $user -P $password raw 0x30 0x30 0x02 0xff 0x13 >> /dev/null
elif [ $tempCpu -le $medCpu ] ; then
	# Set to 3600 RPM
	ipmitool -I lanplus -H $host -U $user -P $password raw 0x30 0x30 0x01 0x00 >> /dev/null
	ipmitool -I lanplus -H $host -U $user -P $password raw 0x30 0x30 0x02 0xff 0x17 >> /dev/null
elif [ $tempCpu -le $maxCpu ] ; then
	# Set to 5000 RPM
	ipmitool -I lanplus -H $host -U $user -P $password raw 0x30 0x30 0x01 0x00 >> /dev/null
	ipmitool -I lanplus -H $host -U $user -P $password raw 0x30 0x30 0x02 0xff 0x20 >> /dev/null
else
	# Let the server decide beyond max temp
	ipmitool -I lanplus -H $host -U $user -P $password raw 0x30 0x30 0x01 0x01 >> /dev/null
fi