Installing and configuring Nagios can be a complex process, but I can provide you with a general guide for installing and configuring Nagios on a Linux system. However, for detailed information, it's always best to refer to the official Nagios documentation.
CODE USED FOR INSTALLATION**
Make sure your system meets the following requirements:
1- httpd (brower)
2- php (Dashboard)
3- gcc & gd (compiler to convert)
4- make file ( to build)
5- perl ( script)
Step-1: Install Pre-requisites software you EC2 machine prior to Nagios installation like: Apache, php, gcc compiler and gd development libraries:
sudo su
yum install httpd php
yum install gcc glibc glibc-common
yum install gd gd-devel
Step: 2 Create Account information you need to setup a nagios user Run the following commands.
adduser -m nagios
passwd nagios
Now it ask to enter new passwd give whatever you want ex: 12345
groupadd nagioscmd
usermod -a -G nagioscmd nagios
usermod -a -G nagioscmd apache
Step-3: Download nagios core and plugins, create a directory for storing the downloads.
mkdir ~/downloads
cd ~/downloads
Download the source code tarball of both nagios and nagios plugins.
wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.4.10.tar.gz
wget http://nagios-plugins.org/download/nagios-plugins-2.4.6.tar.gz
Step-4: Compile and install Nagios extract the Nagios source code tarball.
tar zxvf nagios-4.4.10.tar.gz
cd nagios-4.4.10
Run the below configuration script with the name of the group which you have created in the above step.
./configure --with-command-group=nagioscmd
Note: if you are getting error after executing the above command:
error:
...
checking for type of socket size... size_t
checking for SSL headers... SSL headers found in /usr
checking for SSL libraries... configure: error: Cannot find ssl libraries
Then install the open ssl-devel then re-execute the above config script
yum install openssl-devel
Compile the nagios source code.
make all
Install binaries, init script, sample config files and set permissions on the external commands directly.
make install
make install-init
make install-config
make install-commandmode
Step-5: Confirgure the web interface.
make install-webconf
Step-6: Create a nagiosadmin account for login into the nagios web interface set the password as well.
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Asking for the password, set a new passwd and keep it memorable.
Restart the service.
service httpd restart
Step-7: Compile and install the nagios and nagios plugins, extract the Nagios plugins source code tarball.
cd ~/downloads
tar zxvf nagios-plugins-2.4.6.tar.gz
cd nagios-plugins-2.4.6
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
Step-8: Start Nagios add Nagios to the list of the system service and have it automatically start when the system boots.
chkconfig --add nagios (if you are not able to add go for next step, no problem)
chkconfig nagios on
Verify the sample Nagios config files-
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
Step-9: If there are no errors start the Nagios.
service nagios start
service httpd restart
****************************END OF CODE *******************************
Step-10 : Copy the public IP address of EC2 instance and paste in you local browser in give way.
http://52.15.50.246/nagios/
FIG-1
FIG-2
FIG-3
If you have successfully set up for Nagios and can access the application without any issues, that's great news!
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