Nagios Support Forum

Summary:

Using a bash script to run MRTG - track how long MRTG runs for and then submit a passive check result to Nagios

Description:

I've always wanted some more diagnostics for MRTG. Specifically it would be great to know how long MRTG runs for, every time it runs.

I've created a bash script that will run the MRTG job and when the MRTG job finishes it submits a passive check result to Nagios for a localhost service.

The passive service doesn't do any alerting, it's simply for knowing a) how long it takes to run each time b) collecting this data in RRDs for viewing the standard runtimes.
Steps To Reproduce I've attached a script called mrtg.sh which needs to be placed into:
/usr/local/nagiosxi/scripts/

Update ownership and permissions:
chown root:nagios /usr/local/nagiosxi/scripts/mrtg.sh
chmod +rx /usr/local/nagiosxi/scripts/mrtg.sh

Update cron job:
cat /etc/cron.d/mrtg
*/5 * * * * root /usr/local/nagiosxi/scripts/mrtg.sh

Create passive service for localhost:

define service {
host_name localhost
service_description MRTG Runtime Statistics
use xiwizard_passive_service
max_check_attempts 1
check_interval 1
retry_interval 1
check_period xi_timeperiod_24x7
notification_interval 1
notification_period xi_timeperiod_24x7
contacts nagiosadmin
register 1
}

Sit back and relax while the bash script does all the work.