Editing NRPE Installation on Centos 7.x or RHEL 7.x

[[category:Nagios‏‎]]

'''CentOS 7.0 - NRPE'''

'''Reference''' : http://sites.box293.com/nagios/guides/nrpe/installing-nrpe-client-agent/unix-linux/centos-7-0---nrpe

The following steps will install the NRPE Client / Agent version 2.15. This uses a custom installer from Nagios Enterprises, it automates the installation and configuration process and it much easier than installing from source.

These steps were performed on a CentOS 7.0 server (minimal install).

'''Install NRPE Client / Agent'''

# yum -y install wget openssl-devel and press Enter
# cd /tmp and press Enter
# wget http://assets.nagios.com/downloads/nagiosxi/agents/linux-nrpe-agent.tar.gz and press Enter
Wait for the file to download 
# tar xzf linux-nrpe-agent.tar.gz and press Enter
# cd linux-nrpe-agent and press Enter
#./fullinstall and press Enter
Type y and press Enter
Wait for the fullinstall command to complete
When prompted, type the IP Address of your Nagios server, for example: 
Type 192.168.142.129 and press Enter
The NPRE Client / agent is now installed and listening on port 5666.

# systemctl start xinetd
# systemctl status xinetd
Test NRPE Client / Agent

# netstat -antup | grep 5666
# telnet 127.0.0.1 5666


This will test that the NRPE Client / Agent is properly installed and listening on port 5666. The following command is executed on a Nagios Core server and the computer running the NPRE Client / Agent has the ip address 

192.168.142.132.

Type /usr/local/nagios/libexec/check_nrpe -H 192.168.142.132 and press Enter

You should receive a response like:

NRPE v2.15

This confirms the NRPE Client / Agent is working

'''Issues''' 

[root@mail ~]# telnet localhost 5666

Trying 127.0.0.1...

Connected to localhost.

Escape character is '^]'.

Connection closed by foreign host.

Resolution:

# ll /usr/local/nagios/etc/nrpe.cfg
-rw-r--r--. 1 nagios nagios 7227 Oct  9 04:15 /usr/local/nagios/etc/nrpe.cfg
# chmod 666 /usr/local/nagios/etc/nrpe.cfg
# ll /usr/local/nagios/etc/nrpe.cfg
-rw-rw-rw-. 1 nagios nagios 7227 Oct  9 04:15 /usr/local/nagios/etc/nrpe.cfg
# systemctl start xinetd
[root@mail ~]# systemctl restart xinetd