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A Nagios plugin to monitor memory utilization
Perl PHP
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example-images
plugins
pnp4nagios/templates
README.md

README.md

nagios-memory

A nagios plugin and supporting pnp4nagios templates to monitor/graph memory usage.

check_mem

License

Copyright (c) 2012 Jason Hancock jsnbyh@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Installation

Copy the check_mem from the plugins directory into your nagios plugins directory. This plugin runs locally on a machine via NRPE, so you will need to do this for any machine you wish to monitor.

On the nagios server copy pnp4nagios/templates/check_mem.php into your pnp4nagios templates directory.

NRPE Configuration

Add the following to your NRPE configuration file and restart NRPE (adjust the plugin path as necessary):

command[check_mem]=/usr/lib64/nagios/plugins/check_mem -w 80 -c 90

The thresholds are expressed as percents, so this example would issue a warning at 80% utilization and a critical at 90% utilization.

Nagios Configuration

Assuming you already have a check_nrpe command defined, you simply need to add a service definition:

define service{
    use                  generic-service-graphed
    service_description  Memory Usage 
    hostgroups           Linux Servers 
    check_command        check_nrpe!check_mem
}
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