Utilities

Capture command output

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Description:

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

Current Version

1.1

Last Release Date

2015-09-29

Compatible With

  • Nagios 1.x
  • Nagios 2.x
  • Nagios 3.x
  • Nagios 4.x

Owner

Jess Portnoy

License

GPL

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Project Files
FileDescription
capture_output.pl
Project Notes
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) Add a Review
Very useful
by ikarpov, September 30, 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...


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