Howto remote monitor cPanel with Nagios via installing NRPE
Using a Nagios plug-in called NRPE to monitor the health of a server in conjunction with external checking (aka checking for open ports) gives a little more in-depth check. It can also allow you to catch some problems before they result in a service being unavailable.
Firstly make sure you have opened the NRPE port on your firewall 5666 tcp.
Install
nagios-plugin installation cd /usr/src/ /usr/sbin/useradd nagios passwd nagios wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz tar -xvzf nagios-plugins-1.5.tar.gz cd nagios-plugins-1.5 ./configure make make install chown nagios.nagios /usr/local/nagios chown -R nagios.nagios /usr/local/nagios/libexec
Make sure that xinetd has installed on the server. Else install using : yum install xinetd
Check for Openssl-devel
this should should give a result. rpm -qa | grep openssl-devel
If you dont please install via yum yum install openssl*
edit /etc/xinetd.d/nrpe Change the IP at the “only_from” option. To the IP of the server that will monitor it. Should end up looking like this: # default: on # description: NRPE (Nagios Remote Plugin Executor) service nrpe { flags = REUSE socket_type = stream port = 5666 wait = no user = nagios group = nagios server = /usr/local/nagios/bin/nrpe server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd log_on_failure += USERID disable = no only_from = 11.11.11.11 }
echo "nrpe 5666/tcp # Nagios Plugin NRPE" >> /etc/services chkconfig xinetd on service xinetd restart
That is all that should be needed for the default setup of NRPE checks. The default checks should be found in /usr/local/nagios/etc/nrpe.cfg
To test if this is working from your monitoring nagios server run one of the following (depending where check_nrpe was installed to)
