add service and script, update readme

This commit is contained in:
Shoaib Khan 2023-08-14 23:56:07 -04:00
parent a08f282fe2
commit 4f02974dc4
3 changed files with 129 additions and 0 deletions

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@ -55,3 +55,28 @@ Date 04-09-2020 10:24:52
--> Setting fan speed to 20%
```
Once you have verified the script is working you can set it to run every 5 minuites via cron. On TrueNAS this can be found under the Tasks menu --> Cron Jobs.
##Running as a service
Once the service is up and running, the temprature will be checked every `INTERVAL_SEC` seconds. Fan speed will change if the temprature has changed and warrants a speed change.
There is a delay before the temprature monitoring begins and is controlled by the variable `INITIAL_START_DELAY_SEC`. After this initial delay the time between checks is governed by the `INTERVAL_SEC` value.
When the server is shutdown/rebooted or started, the manual control is reset, this is to avoid any left over low fan speeds from previous power outage/powerdown/shutdown etc.
The files required to run the service are `fan_control_dyn.sh` `fancontrol.service`
Simply execute the following to get the service set up.
```
sudo cp fan_control_dyn.sh /usr/local/sbin/fan_control_dyn.sh
sudo chmod 755 /usr/local/sbin/fan_control_dyn.sh
sudo cp fancontrol.service /etc/systemd/system/fancontrol.service
sudo systemctl enable fancontrol.service
sudo systemctl start fancontrol.service
```
If you are using a location other than `/usr/local/sbin/fan_control_dyn.sh` then you'll need to modify the location in the `fancontrol.service` file as well
```
ExecStart=/MY_ABSOLUTE_PATH/fan_control_dyn.sh
```

84
fan_control_dyn.sh Normal file
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#!/bin/bash
# Variables
IDRAC_IP="IP address of iDRAC"
IDRAC_USER="user"
IDRAC_PASSWORD="passowrd"
INTERVAL_SEC=5
INITIAL_START_DELAY_SEC=60
TEMP_THRESHOLD=35
TEMP_SENSOR="04h" # Inlet Temp
#TEMP_SENSOR="01h" # Exhaust Temp
#TEMP_SENSOR="0Eh" # CPU 1 Temp
#TEMP_SENSOR="0Fh" # CPU 2 Temp
FCTRL=0 #disabled, enabled=1
LAST_PCT=0
toggle() {
ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x01 $1 2>&1 >/dev/null
}
reset_manual() {
toggle 0x01
FCTRL=0 #disabled
}
set_manual() {
toggle 0x00
FCTRL=1 #enabled
}
graceful_exit() {
reset_manual
exit 0
}
trap graceful_exit SIGINT SIGTERM
# need the reset in case the system boots up with the last set value
reset_manual
#start delay
sleep $INITIAL_START_DELAY_SEC
while [ 1 ]
do
# Get temperature from iDARC.
T=$(ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD sdr type temperature 2>/dev/null | grep $TEMP_SENSOR | cut -d"|" -f5 | cut -d" " -f2)
# If ambient temperature is above 35deg C enable dynamic control and exit, if below set manual control.
if [[ $T -ge $TEMP_THRESHOLD ]]
then
if [[ $FCTRL -ne 0 ]]
then
reset_manual
fi
else
# This gives a Percent that is a multiple of 5 for ranges of 5 degC
PCT=$(( 5 * ( T / 5 ) ))
# Min PCT Allowed is 10
PCT=$(( PCT < 10 ? 10 : PCT ))
if [[ $LAST_PCT -ne $PCT ]]
then
if [[ $FCTRL -eq 0 ]]
then
set_manual
fi
PCTHEX=$(printf '0x%02x' $PCT)
ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $PCTHEX 2>&1 >/dev/null
LAST_PCT=$PCT
fi
fi
sleep $INTERVAL_SEC
done

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fancontrol.service Normal file
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[Unit]
Description=Fan Control script
StartLimitIntervalSec=14400
StartLimitBurst=10
[Service]
Restart=on-abnormal
User=root
Group=root
ExecStart=/usr/local/sbin/fan_control_dyn.sh
ProtectSystem=full
TimeoutStopSec=5s
[Install]
WantedBy=multi-user.target