Nagios Installation Script

#!/bin/bash
#Author Karthikeyan.s

#Any Failing Command Will Cause The Script To Stop
set -e

#Treat Unset Variables As Errors
set -u

test $(id -u) -eq 0 || ( echo "You are not a root user to run this script " ; exit 1; )


echo "IMPORTANT: KINDLY MAKE SURE THAT YOU HAVE DISABLED SELINUX AND IPTABLES ........"
echo "NAGIOS INSTALLATION IS GOING TO BE START WITHIN 10 SECONDS......................"
sleep 5
echo "Nagios installation started : " `date`

echo "Installing Pre-requisites"
yum -y install httpd php
yum -y install gcc glibc glibc-common
yum -y install gd gd-devel
yum -y install openssl-devel

echo "Creating nagios user and setting password "
/usr/sbin/useradd -m nagios
echo "nagios" | /usr/bin/passwd --stdin nagios
/usr/sbin/groupadd nagcmd
/usr/sbin/usermod -a -G nagcmd nagios
/usr/sbin/usermod -a -G nagcmd apache
echo " Creating downloads folder in /opt directory "

mkdir /opt/downloads
cd /opt/downloads/
echo "Downloading Nagios and Nagios plugins "
wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-3.2.3.tar.gz
wget http://prdownloads.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.15.tar.gz
tar -xvf nagios-3.2.3.tar.gz
cd nagios-3.2.3
echo "configuring Nagios"
./configure --with-command-group=nagcmd
make all
make install
make install-init
make install-config
make install-commandmode
make install-webconf
echo "Set htpasswd for nagios"
htpasswd -nb nagiosadmin nagios > /usr/local/nagios/etc/htpasswd.users
/sbin/service httpd restart
cd ../
tar -xvf nagios-plugins-1.4.15.tar.gz
cd nagios-plugins-1.4.15
echo "nagios Plugins "
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
/sbin/chkconfig --add nagios
/sbin/chkconfig nagios on
echo "verifying nagios "
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
/sbin/service nagios start

echo "Nagios Installation finished successfully..."

How to install ndoutils on centos

How to Install Ndoutils on nagios version 3 above
==================================================


Install Ndoutils pre-requists
-----------------------------

# yum -y install mysql mysql-server mysql-client gcc-c++ libdbi-dbd-mysql
# /etc/init.d/mysqld start
# /sbin/chkconfig mysqld on
# /usr/bin/mysqladmin -u root password your_password


Create database for nagios
---------------------------

# mysql -u root -pyourpassword
mysql> create database nagios;
mysql> grant all privileges on nagios.* to 'nagios'@'localhost' identified by “nagios” with grant option;
mysql> flush privileges;
mysql> quit

Download ndoutils
-----------------

# mkdir /opt/downloads
# cd /opt/downloads
# wget http://sourceforge.net/projects/nagios/files/ndoutils-1.x/ndoutils-1.4b9/ndoutils-1.4b9.tar.gz/download
# cd /opt/downloads/ndoutils-1.4b9

Installing ndoutils
--------------------

./configure --prefix=/usr/local/nagios/ --enable-mysql --disable-pgsql --with-ndo2db-user=nagios -with-ndo2db-group=nagcmd

make

Manual install ( NO MAKE INSTALL )

-----------------------------------
# db/installdb -u nagios -p nagios -h localhost -d nagios

# cp ./src/ndomod-3x.o /usr/local/nagios/bin/ndomod.o
# cp ./src/ndo2db-3x /usr/local/nagios/bin/ndo2db
# cp ./config/ndo2db.cfg-sample /usr/local/nagios/etc/ndo2db.cfg
# cp ./config/ndomod.cfg-sample /usr/local/nagios/etc/ndomod.cfg
# chmod 774 /usr/local/nagios/bin/ndo*
# chown nagios:nagios /usr/local/nagios/bin/ndo*

Install the init script
------------------------

# cp ./daemon-init /etc/init.d/ndo2db
# chmod +x /etc/init.d/ndo2db
# chkconfig -add ndo2db


Edit nagios.cfg and verify or add the following lines
------------------------------------------------------
# vim /usr/local/nagios/etc/nagios.cfg

event_broker_options=-1
broker_module=/usr/local/nagios/bin/ndomod.o config_file=/usr/local/nagios/etc/ndomod.cfg



Make necessary modifications in ndo2db.cfg file ( My Sample cfg file )
----------------------------------------------------------------------
# vim /usr/local/nagios/etc/ndo2db.cfg

lock_file=/usr/local/nagios/var/ndo2db.lock

ndo2db_user=nagios
ndo2db_group=nagios

socket_type=unix
#socket_type=tcp

socket_name=/usr/local/nagios/var/ndo.sock

tcp_port=5668

use_ssl=0

db_servertype=mysql

db_host=localhost

db_port=3306

db_port=3306

db_prefix=nagios_

db_user=nagios
db_pass=nagios

max_timedevents_age=1440

max_systemcommands_age=10080

max_servicechecks_age=10080

max_hostchecks_age=10080

max_eventhandlers_age=44640

max_externalcommands_age=44640

debug_level=0

debug_verbosity=1

debug_file=/usr/local/nagios/var/ndo2db.debug

max_debug_file_size=1000000


# vim /usr/local/nagios/etc/ndomod.cfg

instance_name=default

#output_type=tcpsocket
output_type=unixsocket

output=/usr/local/nagios/var/ndo.sock

tcp_port=5668

use_ssl=0

output_buffer_items=5000

buffer_file=/usr/local/nagios/var/ndomod.tmp

file_rotation_interval=14400

file_rotation_timeout=60

reconnect_interval=15

reconnect_warning_interval=15

data_processing_options=-1

config_output_options=2


Start the ndo2db init script and restart the nagios
----------------------------------------------------

# /etc/init.d/ndo2db start
# /etc/init.d/nagios restart



You will get the log report like this

# tail -f /usr/local/nagios/var/nagios.log


[1296905045] LOG VERSION: 2.0
[1296905045] ndomod: NDOMOD 1.4b9 (10-27-2009) Copyright (c) 2009 Nagios Core Development Team and Community Contributors
[1296905045] ndomod: Successfully connected to data sink. 0 queued items to flush.
[1296905045] Event broker module '/usr/local/nagios/bin/ndomod.o' initialized successfully.
[1296905045] Finished daemonizing... (New PID=7529)


#### Installation finished ####