Chapter 3. Installing Nagios Remote Plug-in Executor (NRPE)

[user@host]# yum install openssl openssl-devel gcc make git

[user@host]# apt install openssl libssl-dev gcc make git

[user@mon]# useradd nagios
[user@mon]# passwd nagios

[user@mon]# wget http://www.nagios-plugins.org/download/nagios-plugins-2.2.1.tar.gz
[user@mon]# tar zxf nagios-plugins-2.2.1.tar.gz
[user@mon]# cd nagios-plugins-2.2.1
[user@mon]# ./configure
[user@mon]# make
[user@mon]# make install

[user@mon]# cd ~
[user@mon]# git clone --recursive https://github.com/valerytschopp/ceph-nagios-plugins.git
[user@mon]# cd ceph-nagios-plugins
[user@mon]# make dist
[user@mon]# make install

[user@mon]# yum install xinetd

[user@mon]# apt install xinetd

[user@mon]# cd ~
[user@mon]# wget https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-3.1.0/nrpe-3.1.0.tar.gz
[user@mon]# tar xvfz nrpe-3.1.0.tar.gz
[user@mon]# cd nrpe-3.1.0
[user@mon]# ./configure
[user@mon]# make all
[user@mon]# make install-groups-users
[user@mon]# make install
[user@mon]# make install-config
[user@mon]# make install-init

[user@mon]# systemctl enable xinetd
[user@mon]# systemctl restart xinetd
[user@mon]# systemctl reload xinetd

[user@mon]# systemctl enable nrpe
[user@mon]# systemctl start nrpe

[user@mon]# firewall-cmd --zone=public --add-port=5666/tcp
[user@mon]# firewall-cmd --zone=public --add-port=5666/tcp --permanent

[user@mon]# iptables -A INPUT -p tcp --dport 5666 -j ACCEPT
[user@mon]# apt-get install iptables-persistent

[user@mon]# vim /etc/xinetd.d/nrpe

# default: off
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
    disable         = yes
    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
    only_from       = 127.0.0.1,<ip-address-of-nagios-core>
    log_on_success  =
}

[user@mon]# systemctl restart xinetd

[user@mon]# vim /usr/local/nagios/etc/nrpe.cfg

allowed_hosts=127.0.0.1,<ip-address-of-nagios-core>

[user@mon]# systemctl restart nrpe

[user@host]# /usr/local/nagios/libexec/check_nrpe -H localhost