Home Directory Utilities Capture command output

Search Exchange

Search All Sites

Nagios Live Webinars

Let our experts show you how Nagios can help your organization.

Contact Us

Phone: 1-888-NAGIOS-1
Email: sales@nagios.com

Login

Remember Me

Directory Tree

Capture command output

Rating
2 votes
Favoured:
0
Current Version
1.1
Last Release Date
2015-09-29
Compatible With
  • Nagios 1.x
  • Nagios 2.x
  • Nagios 3.x
  • Nagios 4.x
License
GPL
Hits
13892
Files:
FileDescription
capture_output.plcapture_output.pl
Nagios CSP

Meet The New Nagios Core Services Platform

Built on over 25 years of monitoring experience, the Nagios Core Services Platform provides insightful monitoring dashboards, time-saving monitoring wizards, and unmatched ease of use. Use it for free indefinitely.

Monitoring Made Magically Better

  • Nagios Core on Overdrive
  • Powerful Monitoring Dashboards
  • Time-Saving Configuration Wizards
  • Open Source Powered Monitoring On Steroids
  • And So Much More!
Captures the stdout and stderr output of a command to a file and returns the original results to Nagios.
This is useful for debugging failing Nagios monitors.

A log entry sample:

2015-8-27 13:22:54 ------ debugging
cmd=[/usr/lib/nagios/plugins/check_disk '-w' '20%' '-c' '10%' '-e']
output=[DISK CRITICAL - /run/user/1001/gvfs is not accessible: Permission denied
]
retcode=2
This plugin was originally written 2007-03-24 by Wolfgang Wagner (http://www.waggy.at/nagios/capture_plugin.htm)
Copyright 2007 by Wolfgang Wagner. All rights reserved.

The plugin does not require any additional utilities, it simply wraps the original command, logs the output to a file and then returns the results and RC back to Nagios for handling.


Configuration:

Consider this command:
define command{
command_name check_ssl_cert
command_line /usr/lib/nagios/plugins/check_http -H '$HOSTADDRESS$' -I '$HOSTADDRESS$' -C10
}

In order to use the plugin, simple add /path/to/capture_output.pl in the beginning of the command, like so:

define command{
command_name check_ssl_cert
command_line /usr/lib/nagios/plugins/capture_output.pl /usr/lib/nagios/plugins/check_http -H '$HOSTADDRESS$' -I '$HOSTADDRESS$' -C10
}


Revised by Jess Portnoy on 2015-09-28, Changes:
- Exit with 3 [UNKNOWN] if cannot open() or close() file
- chmod file to 600 since it might contain sensitive info
- some cleanup

Reviews (1)
byikarpov, September 3, 2017
I spent few hour trying to figure it out why plugin that works just fine from the command line, does not work under centreon. And this script told me that sudo wants tty...