Configure Nagios Client

nagios-client-script.sh

#!/bin/bash

function ask {
  echo -n "Allowed IP to access NRPE: "
  # read -e ALLOWEDIP
}

function system_primary_ip {
  # returns the primary IP assigned to eth0
  echo $(ifconfig eth0 | awk -F: '/inet addr:/ {print $2}' | awk '{ print $1 }')
}

function installer {
  sudo apt-get -y install nagios-nrpe-server
}

function perms {
  sudo chown -R nagios:nagios /etc/nagios
  sudo rm -R /etc/nagios/nrpe.cfg
  sudo rm -R /etc/nagios/nrpe_local.cfg
}

# Add the configuration to the nrpe.cfg file

function configure {
sudo cat <<EOD > /etc/nagios/nrpe.cfg
#############################################################################
# Sample NRPE Config File
# Originally Written by: Ethan Galstad (nagios@nagios.org)
# Edited by Luis Elizondo
#
# NOTES:
# All the documentation of this file can be found with the NRPE file
# In Ubuntu this is located at /etc/nagios
#############################################################################

log_facility=daemon
pid_file=/var/run/nagios/nrpe.pid
server_port=5666
#server_address=127.0.0.1
nrpe_user=nagios
nrpe_group=nagios
allowed_hosts=173.255.196.113

# *** ENABLING THIS OPTION IS A SECURITY RISK! ***
# Values: 0=do not allow arguments, 1=allow command arguments
dont_blame_nrpe=0

# *** THIS EXAMPLE MAY POSE A POTENTIAL SECURITY RISK, SO USE WITH CAUTION! ***
# command_prefix=/usr/bin/sudo

# Values: 0=debugging off, 1=debugging on
debug=1
command_timeout=60
connection_timeout=300
#allow_weak_random_seed=1

#include=/etc/nagios/nrpe_local.cfg
include_dir=/etc/nagios/nrpe.d/

## Commands to Use with NRPE
# The following examples use hardcoded command arguments...
command[check_users]=/usr/lib/nagios/plugins/check_users -w 1 -c 2
command[check_load]=/usr/lib/nagios/plugins/check_load -w 15,10,5 -c 30,25,20
command[check_hda1]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -p /dev/hda1
command[check_zombie_procs]=/usr/lib/nagios/plugins/check_procs -w 5 -c 10 -s Z
command[check_total_procs]=/usr/lib/nagios/plugins/check_procs -w 150 -c 200
command[check_all_disks]=/usr/lib/nagios/plugins/check_disk -w 20% -c 10% -e
command[check_apt]=/usr/lib/nagios/plugins/check_apt
command[check_procs_http]=/usr/lib/nagios/plugins/check_procs -w10 -c20 -s httpd
EOD

}

function restart {
  sudo /etc/init.d/nagios-nrpe-server restart
}

function finish {
  echo "Ready, add the $(system_primary_ip) to your host"
}

#ask
system_primary_ip
installer
perms
configure
restart
finish