• OpenNmsNagiosPlugins

Using Nagios plugins with OpenNMS

OpenNMS can use Nagios plugins.

Setup NRPE

• On the machine to be monitored install the following packages:
  • nrpe
  • nagios-plugins-nrpe
  • nagios-plugins
  • Plugins go in /usr/lib/nagios/plugins
• On the monitoring machine install nagios-plugins-nrpe (just for testing).
• Start nrpe on the target machine (make sure you open port 5666 for your monitoring server):

# service nrpe start

• On your monitoring server, check you can connect (this should return the NRPE version):

$ /usr/lib/nagios/plugins/check_nrpe -n -H example.com -c _NRPE_CHECK

Setup OpenNMS

• Check in /opt/opennms/etc/examples for poller-configuration.xml and capsd-configuration.xml
• Copy the NRPE examples to your live config files and restart OpenNMS

SSL

Unfortunately OpenNMS can't talk SSL to NRPE so we need to modify /etc/init.d/nrpe on the target machine to use the -n switch:

# See how we were called.
case "$1" in
  start)
        # Start daemons.
        echo -n "Starting nrpe: "
        daemon $NrpeBin -c $NrpeCfg -d -n
        echo
        touch $LockFile
        ;;

Obviously you will want to restrict who can connect to your nrpe daemon using firewall rules.

CategoryLinux