How To Install Icinga 2 on CentOS 7

r00t January 9, 2017

Install Icinga 2 on CentOS 7

In this tutorial we will show you how to install and configuration of Icinga 2 on your CentOS 7 server. For those of you who didn’t know, Icinga 2 is an open source network monitoring system which checks the availability of your network resources, notifies users of outages, and generates performance data for reporting. Its Scalable and extensible, Icinga2 can monitor large, complex environments across multiple locations.

This article assumes you have at least basic knowledge of linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo’ to the commands to get root privileges. I will show you through the step by step installation Icinga 2 on a CentOS 7 server.

Icinga 2 Features

  • Monitoring of network services (SMTP, POP3, HTTP, NNTP, ping, etc.)
  • Monitoring of host resources (CPU load, disk usage, etc.)
  • Monitoring of server components (switches, routers, temperature and humidity sensors, etc.)
  • Simple plug-in design that allows users to easily develop their own service checks,
  • Parallelized service checks.
  • Ability to define network host hierarchy using “parent” hosts, allowing detection of and distinction between hosts that are down and those that are unreachable.
  • Ability to define event handlers to be run during service or host events for proactive problem resolution.
  • Notification of contact persons when service or host problems occur and get resolved (via email, pager, or user-defined method).
  • Escalation of alerts to other users or communication channels.
  • Two optional user interfaces (Icinga Classic UI and Icinga Web) for visualization of host and service status, network maps, reports, logs, etc.
  • Icinga Reporting module based on open source Jasper Reports for both Icinga Classic and Icinga Web user interfaces
  • Capacity utilization reporting.
  • Performance graphing via add-ons such as PNP4Nagios, NagiosGrapher and InGraph.

Install Icinga 2 on CentOS 7

Step 1. First let’s start by ensuring your system is up-to-date.

Step 2. Next, you can add the EPEL repository before you can install Odoo using YUM:

Run the following command to do so:

Step 3. Installing Icinga 2.

First, enable the add-repository feature and add the repository for Icinga with the below commands:

Now run the Icinga 2 Installation command as shown below:

Once the installation is complete. Make sure the service is up and running fine:

By default, Icinga2 enables the following features. But we can confirm the enabled settings by running this command as below:

Step 4. Installing Icinga2 plugin.

Icinga2 will collect the service information based on the monitoring plugins. So, we need to install nagios plugin using below command:

Next, you need to install the IDO module which is crucial for the Icinga 2 web interface. It will export all configuration and status information into its database. Execute the following command:

Then restart Icinga 2 for the changes to take effect:

Step 5. Configure the MySQL database for Icinga2.

Create a database for Icinga 2:

Step 6. Installing Icinga 2 Web.

First, setting up external command pipe:

Before you can send commands to Icinga 2 using a web interface, you need to add the “apache” user to the icingacmd group:

Next, we can install the Web interface plugin and configure it one by one:

Generate authentication token for later use in the web interface:

Step 7. Setup Firewall Rules.

If you installed iptables you have to allow the httpd and its port to work outside the world:

Step 6. Accessing Icinga 2.

Icinga2 will be available on HTTP port 80 by default. Open your favorite browser and navigate to or http://server-ip/icingaweb2/setup and complete the required the steps to finish the installation. If you are using a firewall, please open port 80 to enable access to the control panel.

Install Icinga 2 on CentOS 7

Congratulation’s! You have successfully installed Icinga 2. Thanks for using this tutorial for installing Icinga 2 network monitoring on CentOS systems. For additional help or useful information, we recommend you to check the official Icinga 2 web site.

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