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add service and script, update readme
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25
README.md
25
README.md
@ -55,3 +55,28 @@ Date 04-09-2020 10:24:52
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--> Setting fan speed to 20%
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```
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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.
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##Running as a service
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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.
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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.
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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.
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The files required to run the service are `fan_control_dyn.sh` `fancontrol.service`
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Simply execute the following to get the service set up.
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```
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sudo cp fan_control_dyn.sh /usr/local/sbin/fan_control_dyn.sh
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sudo chmod 755 /usr/local/sbin/fan_control_dyn.sh
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sudo cp fancontrol.service /etc/systemd/system/fancontrol.service
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sudo systemctl enable fancontrol.service
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sudo systemctl start fancontrol.service
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```
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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
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```
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ExecStart=/MY_ABSOLUTE_PATH/fan_control_dyn.sh
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```
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84
fan_control_dyn.sh
Normal file
84
fan_control_dyn.sh
Normal file
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#!/bin/bash
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# Variables
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IDRAC_IP="IP address of iDRAC"
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IDRAC_USER="user"
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IDRAC_PASSWORD="passowrd"
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INTERVAL_SEC=5
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INITIAL_START_DELAY_SEC=60
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TEMP_THRESHOLD=35
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TEMP_SENSOR="04h" # Inlet Temp
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#TEMP_SENSOR="01h" # Exhaust Temp
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#TEMP_SENSOR="0Eh" # CPU 1 Temp
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#TEMP_SENSOR="0Fh" # CPU 2 Temp
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FCTRL=0 #disabled, enabled=1
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LAST_PCT=0
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toggle() {
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ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x01 $1 2>&1 >/dev/null
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}
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reset_manual() {
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toggle 0x01
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FCTRL=0 #disabled
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}
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set_manual() {
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toggle 0x00
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FCTRL=1 #enabled
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}
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graceful_exit() {
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reset_manual
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exit 0
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}
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trap graceful_exit SIGINT SIGTERM
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# need the reset in case the system boots up with the last set value
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reset_manual
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#start delay
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sleep $INITIAL_START_DELAY_SEC
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while [ 1 ]
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do
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# Get temperature from iDARC.
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T=$(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)
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# If ambient temperature is above 35deg C enable dynamic control and exit, if below set manual control.
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if [[ $T -ge $TEMP_THRESHOLD ]]
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then
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if [[ $FCTRL -ne 0 ]]
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then
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reset_manual
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fi
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else
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# This gives a Percent that is a multiple of 5 for ranges of 5 degC
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PCT=$(( 5 * ( T / 5 ) ))
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# Min PCT Allowed is 10
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PCT=$(( PCT < 10 ? 10 : PCT ))
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if [[ $LAST_PCT -ne $PCT ]]
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then
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if [[ $FCTRL -eq 0 ]]
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then
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set_manual
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fi
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PCTHEX=$(printf '0x%02x' $PCT)
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ipmitool -I lanplus -H $IDRAC_IP -U $IDRAC_USER -P $IDRAC_PASSWORD raw 0x30 0x30 0x02 0xff $PCTHEX 2>&1 >/dev/null
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LAST_PCT=$PCT
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fi
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fi
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sleep $INTERVAL_SEC
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done
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20
fancontrol.service
Normal file
20
fancontrol.service
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[Unit]
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Description=Fan Control script
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StartLimitIntervalSec=14400
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StartLimitBurst=10
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[Service]
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Restart=on-abnormal
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User=root
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Group=root
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ExecStart=/usr/local/sbin/fan_control_dyn.sh
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ProtectSystem=full
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TimeoutStopSec=5s
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[Install]
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WantedBy=multi-user.target
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