CPU usage alarm

trexos

Hello,

I have some gameservers and sometimes they need a high CPU usage, that's why I get a warning from my hoster. Of course I would like to avoid that and I'm asking myself if there is a script which checks the cpu usage and if it's above a fixed value, send me an email or something like that.

Thanks in advance for your help

klikli

lfd?

trexos

Thanks! Looks good but is it possible to automatically send emails when the cpu usage is to high?

gbshouse

@trexos - Create free NewRelic account, install monitoring agent and configure the thresholds

perennate

You can do that with monit.

SegmentationFault

If all you want is an email when your cpu usage goes to high, you don't need to install anything fancy. You could use one of the many monitoring/alerting apps like the dudes above suggested, but <10 lines of bash combined with smtp-cli would do the job.

NodePing

Lots of options mentioned. We'll throw our hat in the ring too - NodePing.com

asterisk14

new relic or scale extreme is better, even send you a sms!

DomainBop

this script will automatically restart apache2 if the load gets above a value you set (change the value on the line check -gt 8 to whatever you need) and will also restart it if apache2 goes down.

1. name script apache_check and upload the script to /bin, change permissions to 755
2. run a cronjob (see script below) to check every x minutes (5 works well). To avoid receiving annoying emails every 5 minutes use the cron command:
   /bin/apache2checker >/dev/null 2>&1 instead of the one in the script notes.

#!/bin/sh

#*/5 * * * * /home/scripts/apache_check >> /home/scripts/apache_check.log
# Bash script that checks apache:
#   - Apache running or not, if needed start it up again
#   - If server load is higher than 20, restart apache
#
#   Script to be ran as cronjob (every 5 minutes)
#   */5 * * * * /path/to/apache_check >> /path/to/apache_check.log 

echo "Apache checker running at " `date`
run=`ps ax | grep /usr/sbin/apache2 | grep -v grep | cut -c1-5 | paste -s -`
if [ "$run" ];
then
echo "Apache is running"
else
echo "Apache seems to be down, starting it up again"
apache2ctl start
fi 

#!/bin/sh
check=`uptime | sed 's/\./ /' | awk '{print $10}'`

if [ $check -gt 8 ]
then
        /etc/init.d/apache2 restart
fi