Nagios XI is the most powerful IT infrastructure monitoring solution on the market. Nagios XI extends on proven, enterprise-class Open Source components to deliver the best monitoring solution for today’s demanding organizational requirements.
Designed for scalability and flexibility, XI is designed to make problematic IT monitoring tasks simple, while retaining the powerful attributes of its enterprise-class foundation blocks.
In this tutorial, will show how to install Nagios XI in RHEL/Centos/Sientific Linux
Before install Nagios XI You have to install some dependencies using the following commands :
Installs the Dag Wiers repo definition for RPM installations with yum
Installs required RPM, Perl, and other packages required for XI and its related
components. (will take a while to download and install all required packages)
Some packages will fail to install, this is normal.
Creates Nagios user and groups on the system
Initializes the Postgres and MySQL databases. Sets the MySQL root password to
Adds entries to /etc/services
Modifies /etc/sudoers to allow the nagios user to run certain commands
Updates the iptables definitions in /etc/sysconfig/iptables to allow traffic for various
This is currently a null operation and can be ignored.
Disables SELinux by putting it into non-enforcing mode and modifying
Installs backup scripts for MySQL and Postgres in the /root/scripts directory and creates backup directories in /store/backups
Increases memory limit for PHP to 64MB in /etc/php.ini
Installs the SourceGuardian loaders for 32-bit or 64-bit Linux platforms to
/usr/lib/php/modules or /usr/lib64/php/modules. SourceGuardian is required to
decrypt and run some protected PHP files distributed with Nagios XI. Loaders for
other platforms can be downloaded fromht tp : / / www. so u rce gu a rd ia n . co m/ i xe d s/
Modifies the MRTG config file in /etc/mrtg/mrtg.cfg to use the RRDTool format and
changes permissions so the webserver can write to the file.
Installs various components required by Nagios XI – including Nagios Core, Nagios
Plugins, NDOUtils, PNP, extra plugins, webinject, etc.
Installs the Nagios XI scripts and php files in /usr/local/nagiosxi, sets appropriate file/
directory ownership, and creates and htpasswd file for use with Nagios Core and
Installs cron jobs for the root and nagios users.
Sets all appropriate services to start up in runlevels 3 and 5.
Imports base object definitions (templates, commands, etc.) into NagiosQL for use
with Nagios Core
Starts the NDOUtils, Nagios Core, and PNP daemons
Installs a welcome page in the root webserver directory /var/www/htm
When installation of the above dependecies is done withthout issues, you can acces your Nagios page by typing in you favorite browser the following:
– Now restart your Server and begin the Gui install via the browser :