Install Centreon Monitoring on AlmaLinux 8 | Rocky Linux 8

Centreon is an open-source monitoring system for monitoring IT infrastructures. Due to its modular structure and good scalability suitable for monitoring small to big networks through to complex IT environments with hundreds of hosts. Here in this tutorial, we will learn the commands to install the Open Source Centreon monitoring tool on AlmaLinux 8 or Rocky Linux 8 RPM Linux.

The project Centreon started in 2005 and was distributed among developers under GPLv2 and Apache Open Source licenses. It comes in four editions- Open Source; IT Edition; Business Edition and MSP Edition. Of course, editions other than open-source are subscription-based and with extra features as compared to community (open source) ones.

Just like Nagios or Icinga, Centreon also offers a web interface to view and manage multiple systems, furthermore, configuration through the Centreon web interface makes the effort considerably easier, especially when monitoring complex IT environments with hundreds of hosts and services.

Centreon can be put into operation on various Linux distributions. CentOS and various Debian derivatives are officially planned. Centreon Web requires an Apache web server for operation; MySQL is used for the required database.

As a multi-user system, Centreon offers well-thought-out rights management. It is thus possible to provide users or groups with only part of the monitoring results or to restrict the configuration options.

 

Steps to install Centreon on AlmaLinux 8 | Rocky Linux 8

Requirements:

Apache web-server
MariaDB Database
1 vCPU / 1 GB for less than 50 hosts

 

Run DNF update command on Almalinux or Rocky

First of all, use the DNF package manager and run the system update command to make sure all the packages are up to date including the repository cache.

sudo dnf update

 

Disable SELinux for proper Centreon installation

Next, disable SElinux to let the Centreon install properly without any problem, however, once the setup is complete, you can re-enable it again.

sed -i s/^SELINUX=.*$/SELINUX=disabled/ /etc/selinux/config

Once done, reboot the system:

sudo reboot

 

Install EPEL, PowerTools, and REMI Repositories

To install Centreon we need some packages available through EPEL, Remi, and PowerTools. Hence, before going any further, let’s first install and enable them, if not already on your system.

sudo dnf install -y dnf-plugins-core

Install EPEL:

sudo dnf install epel-release

Install Remi Repository for PHP 8.0:

sudo dnf install -y https://rpms.remirepo.net/enterprise/remi-release-8.rpm

Enable PowerTools:

sudo dnf config-manager --set-enabled 'powertools' -y

Run update:

sudo dnf update -y

 

Install Apache, MariaDB Database, and PHP 8.0

Both Apache Httpd and MariaDB packages are already available through the default repository of these RHEL based Linux systems, hence just go-to for the given commands:

For Apache and MariaDB

sudo dnf install httpd httpd-tools mariadb-server mariadb -y

Start and Enable Apache and Mariadb services:

sudo systemctl enable --now httpd mariadb

Install Apache and MAriaDB Almalinux

Secure Database:

Run the given command, to get a guided text-based set up for the removal of demo database and anonymous user including limiting the remote access to the database:

mysql_secure_installation

 

Fo PHP 8.0 

sudo dnf module reset php
sudo dnf module install php:remi-8.0 -y

 

Add Centreon Repository on AlamLinux or Rocky Linux 8

As the packages to install Centreon are not available on AlmaLinux or Rocky Linux, hence we have to add it manually using the command given below:

sudo dnf install -y https://yum.centreon.com/standard/21.10/el8/stable/noarch/RPMS/centreon-release-21.10-2.el8.noarch.rpm

Add Centreon Repository on AlamLinux or Rocky

 

Command to install Centreon on Almalinux | Rocky Linux 8

We have installed all the required things, now let’s use the DNF package manager to install packages of Centreon on RHEL based Linux such as AlamLinux, Rocky, or CentOS.

sudo dnf install centreon centreon-database -y

Command to install Centreon on Almalinux or Rocky Linux 8

 

Set the PHP time zone

You are required to set the PHP time zone.

sudo su -

echo "date.timezone = Europe/Paris" >> /etc/php.d/50-centreon.ini

Note: Change Europe/Paris without your Timezone. You can find the list of supported time zones here.

 

Enable services to start with system boot

sudo systemctl enable php-fpm httpd mariadb cbd centreon 
sudo systemctl enable centengine gorgoned snmptrapd centreontrapd snmpd
sudo systemctl restart php-fpm httpd mariadb cbd centreon 
sudo systemctl restart centengine gorgoned snmptrapd centreontrapd snmpd

 

Allow port 80 and 443 in the firewall

If you have enabled firewall then allow http and https ports in the firewall:

sudo firewall-cmd --zone=public --permanent --add-port=80/tcp
sudo firewall-cmd --zone=public --permanent --add-port=443/tcp
sudo systemctl reload firewalld

 

Access Cenetron Web installation

Now, open the web browser on your local system that can access the server IP address where you have installed the Cenetron Monitoring tool.

Example:

http://server-ip/cenetron

 

Configuration and Setting Up Database

Follow the guided web-based configuration wizard of Centreon and then when the “Admin information” page comes, set password for Admin user account.

Create Admin user

On the Database setup page, add the root user password you have set for the Database server. After that enter whatever password you want to set for Database “centreon” for the Centreon Monitoring tool.

Create Database for Cenetron on Rocky Linux 8

Create Database for Cenetron on Rocky Linux 8Database configuration Modules to install Log in

 

Dashboard Centreon Monitoring tool

Once you logged in, the Dashboard will appear.

Rocky Linux or Almalinux Dashboard Centreon Monitoring tool

To install Poller on some remote system to monitor you can refer to the official documentation. 

 

Other Tutorials:

5 Best htop alternatives to monitor Linux systems
7 Best Gnome system monitor alternative Linux applications
How to install Netdata on Linux such as Ubuntu 20.04 Server

 

 

 

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