Nagios SNMP Plugins

Nagios SNMP Plugins are super handy! This package comes with two plugins you can use alongside Nagios. While they might still work with NetSaint, it’s pretty outdated, so I don't support that anymore. Just a heads up, you'll need a decent version of the Net SNMP Daemon to get started.

What Makes NET-SNMP Special?

Now, let’s talk about NET-SNMP. It has this cool feature that lets you check running processes and disk sizes right from the SNMP daemon. You can configure your checks in the snmpd.local.conf file like this:

proc  syslogd

proc  klogd

disk  /    5%

disk  /usr 10%

This setup ensures that your system always has free space on crucial drives and keeps those important processes running smoothly!

Making Life Easier

Querying these stats from a monitoring tool can be tricky, but don’t worry—these plugins do all the heavy lifting for you. I created them mainly for Linux, but they should work on other *x operating systems too! If you manage to get them to compile elsewhere, please share your success!

Compatibility and Testing

I tested these plugins on several systems, including:

• RedHat Linux 9


• Fedora Core (1-6)


• RedHat Enterprise Linux (3-5)


• CentOS 5

If you're using *BSD, it should compile as long as you've got a GNU getline library.

The Installation Process

To install, just unpack the distribution and run these commands:

aclocal

autoheader

automake --add-missing

autoconf

./configure

make

You can also just run ./build.sh. After that, you'll have two binaries: check_snmp_disk and check_snmp_proc.

Configuring Nagios Plugins

You can set up these plugins in Nagios in two ways. The old way is by adding lines to your /etc/nagios/command.cfg. Here's how:

command[check_snmp_disk]=/usr/lib/nagios/plugins/check_snmp_disk -H $HOSTADDRESS$ -C $ARG1$

command[check_snmp_proc]=/usr/lib/nagios/plugins/check_snmp_proc -H $HOSTADDRESS$ -C $ARG1$

The new method involves editing /etc/nagios/checkcommands.cfg. Remember to replace paths as needed!