I'm wondering if there are any public scripts to automatically restart OpenVZ containers on certain load amount / high cpu. Trying to limit my containers on my personal machine, thanks.

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  • this is hammer approach, if you wan't to script it really you can see my answer – Hrvoje Špoljar Nov 10 '14 at 16:17

As seen on : http://openvz.org/Loadavg ; load average of some container can be acquired with

vzctl exec $CTID cat /proc/loadavg

you can script this easily with something like


# loop over all OpenVZ containers
for container in $(vzlist -o ctid | egrep -o '[0-9]+')
  if (( $(bc <<< "$(vzctl exec $container cat /proc/loadavg | cut -d' ' -f1) <= 0.2") == 1 ))
        echo "Load is less than 0.2"
        echo "Load is above 0.2, stopping container $container"
        vzctl stop $container 


It uses the fact that load averages of respective intervals 1 5 and 15 can be read from /proc/loadavg

  • Thank you. I'm unfamiliar with bash scripting. How would I make it kill the process? – user44754 Nov 10 '14 at 16:50
  • if this script is ran inside OpenVZ container as I understood from your question, you adjust load which is too high and restart with 'reboot' command; just add it below echo command in the script. – Hrvoje Špoljar Nov 10 '14 at 16:54
  • I want to run it on the host node to check for containers load. Sorry if I wasn't clear. – user44754 Nov 10 '14 at 17:00
  • I've updated answer with more specific approach to run on system which hosts OpenVZ containers – Hrvoje Špoljar Nov 10 '14 at 17:12
  • Awesome, thank you. I'll give this a try. Would the best way to keep it running is with a cronjob? – user44754 Nov 10 '14 at 17:14

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