Bash script to restart the server if the load is greater than x

Reboot server is the average load is greater than x .md

Put the following script in a .sh file, for example in /root/reboot-load.sh.

#!/usr/bin/bash
LOAD=`uptime |awk '{print $NF}'`
LOADCOMP=`echo "($LOAD * 100) / 1" | bc`
echo "Load is: $LOAD"
if [[ $LOADCOMP -ge 2000 ]]
then echo "Greater than 20 ! Reboot !"
fi
if [[ $LOADCOMP -ge 2000 ]]
then reboot
fi

As the user root, run command crontab -e and add a cron job for this:

*/5 * * * * bash /root/reboot-load.sh

This will check every 5 minutes if the average load for 15 min is greater than 20.00

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If you want to change the limit, for example to 1.52 load, multiply by 100 (result will be 152) and change it in the lines with if:

if [[ $LOADCOMP -ge 152 ]]

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If you want to use the load average for 5 min replace the second line with this:

LOAD=`uptime |awk '{print $(NF-1)}' FS=,`

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If you want to use the load average for 1 min replace the second line with this:

LOAD=`uptime |awk '{print $(NF-2)}' |awk '{print $1}' FS=,`