check_UBC.pl
A Nagios-plugin to monitor fail-counts of OpenVZ containers.
OpenVZ containers may have limited resources, if they reach their maximum and try to request more of a single resource they produce a fail-count that is displayed in /proc/user_beancounters . Maybe you want to get notified about that problem, this script monitors the file and alerts if any fail-counter increases.
To reset the fail-counts you have to restart the container, but sometimes there isn’t the chance to reboot a virtual machine. So this script copies the /proc/user_beancounters (at default the copy is located at /tmp/user_beancounters ) and alerts about diffs. To disable the alert just delete the copy, the script will create a new copy when it is called the next time. So there won’t be a diff anymore.
To get read access to /proc/user_beancounters for the user nagios don’t forget to set the s -bit ( chmod +s check_UBC.pl ).
Dependencies
- Expects the beancounters in
/proc/user_beancounters - Expects
vzctlto be found in/usr/sbin/vzctl
Please consider to take a look at my general setup notes.
Martin Scharm
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3 comments
looks like it depends on some nagios libs as well, which makes it less portable.
On Debian i got this error: Can’t do setuid (cannot exec sperl) Just check the fix here: http://chrisjean.com/2011/06/06/fix-setuid-cannot-exec-sperl/
Hi Hartmut, thanks for reporting and providing the fix :)