check_usolved_disks

Overview

This PHP Nagios plugin automaticly detects all disks/partitions of a Windows or Linux operating system and checks the free space. You don't need a check for every disk and just can use this check that'll return all available disks on the system. If a system gets a new partition you don't need to change your check.

The plugin also returns performance data and you can also exclude disks that you don't want to check.

Authors

Ricardo Klement (www.usolved.net)

Installation

Just copy the file check_usolved_disks.php into your Nagios plugin directory. For example into the path /usr/local/nagios/libexec/

Add execution permission for the nagios user on check_usolved_disks.php. If you have at least PHP 5 this plugin should run out-of-the-box.

Make sure to have the PHP SNMP module installed and enabled in your php.ini.

> apt-get install php5-snmp (Ubuntu, Debian, ...) or > yum install php-snmp (RedHat, CentOS, ...)

Usage

Test on command line

If you are in the Nagios plugin directory execute this command:

./check_usolved_disks.php -H localhost -C public -w 90 -c 95

The output should look like this on a Linux machine:

Disks OK // / (37%), /boot (30%), /dev/shm (0%)
/ - Size: 50.61 GB / Used: 18.73 GB (37% used)
/boot - Size: 0.1 GB / Used: 0.03 GB (30% used)
/dev/shm - Size: 2.91 GB / Used: 0 GB (0% used)

On a Windows machine the output could look something like this:

Disks OK // C: (20.5%), D: (87.8%)
C: - Size: 59.66 GB / Used: 12.24 GB (20.5% used)
D: - Size: 80 GB / Used: 70.22 GB (87.8% used)

Here are all arguments that can be used with this plugin:

-H 
Give the host address with the IP address or FQDN

-C 
Give the SNMP Community String

-w 
Warning treshold in percent

-c 
Critical treshold in percent

[-V ]
Optional: SNMP version 1 or 2c are supported, if argument not given version 1 is used by default

[-P ]
Optional: Give 'yes' as argument if you wish performace data output

[-E '']
Optional: Exclude partitions with a comma separated list on Windows like 'D:,E:' (with or without colon) or on Linux '/var,/tmp'

Install in Nagios

Edit your commands.cfg and add the following.

Example for basic check:

define command {
    command_name    check_usolved_disks
    command_line    $USER1$/check_usolved_disks.php -H $HOSTADDRESS$ -C $_HOSTSNMPCOMMUNITY$ -w $ARG1$ -c $ARG2$
}

Example for using performance data, specific snmp version and excluding some partitions:

define command {
    command_name    check_usolved_disks
    command_line    $USER1$/check_usolved_disks.php -H $HOSTADDRESS$ -C $_HOSTSNMPCOMMUNITY$ -V $_HOSTSNMPVERSION$ -w $ARG1$ -c $ARG2$ -P $ARG3$ -E $ARG4$
}

Edit your services.cfg and add the following.

Example for basic check:

define service{
    host_name               Test-Server
    service_description     Disks
    use                     generic-service
    check_command           check_usolved_disks!90!95
}

Example for using performance data and excluding some partitions:

define service{
    host_name               Test-Server
    service_description     Disks
    use                     generic-service
    check_command           check_usolved_disks!90!95!yes!'D:,E:'
}

What's new

v1.1 Bugfix: If the disk capacity exceeded the 32 bit snmp value, the disk size wasn't calculated and listed correctly

v1.0 Initial release