Installing Nagios on macOS

Nagios is a popular open source software tool used for monitoring IT infrastructure. In this tutorial, we will learn how to install Nagios on macOS.

Prerequisites

• macOS with administrator privileges
• Xcode Command Line Tools
• Homebrew package manager

Step-by-Step installation process

Step 1: Install Xcode Command Line tools

Open Terminal and run the following command:

$ xcode-select --install

Step 2: Install Homebrew

Homebrew is a package manager for macOS. It makes it easy to install and manage software packages.

To install Homebrew, run the following command in Terminal:

$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Step 3: Install dependencies

Before installing Nagios, we need to install all its dependencies. In Terminal, run the following command:

$ brew install autoconf automake gcc httpd apr apr-util libpng openssl gd gettext wget

Step 4: Download Nagios

Download the Nagios source code from https://www.nagios.org/downloads/

Extract the downloaded archive to your desired location.

Step 5: Configure Nagios

In Terminal, navigate to the extracted folder containing the Nagios code.

Next, we need to configure Nagios by running the following command:

$ ./configure --with-httpd-conf=/etc/apache2/

Step 6: Compile and install Nagios

After configuring Nagios, it is time to compile and install it by running the following commands in Terminal:

$ make all
$ sudo make install

Step 7: Configure Nagios web interface

Nagios web interface runs on Apache web server. To configure it, we need to create a configuration file by running the following command in Terminal:

$ sudo nano /etc/apache2/other/nagios.conf

Add the following lines to the file:

ScriptAlias /nagios/cgi-bin "/usr/local/nagios/sbin/"
<Directory "/usr/local/nagios/sbin/">
    Options ExecCGI
    AllowOverride None
    Order allow,deny
    Allow from all
    AuthName "Nagios Access"
    AuthType Basic
    AuthUserFile /usr/local/nagios/etc/htpasswd.users
    Require valid-user
</Directory>

Alias /nagios "/usr/local/nagios/share/"
<Directory "/usr/local/nagios/share/">
    Options None
    AllowOverride None
    Order allow,deny
    Allow from all
    AuthName "Nagios Access"
    AuthType Basic
    AuthUserFile /usr/local/nagios/etc/htpasswd.users
    Require valid-user
</Directory>

Save the file by pressing ctrl + X and then Y, followed by Enter.

Step 8: Configure Nagios user account

Create a new user account for Nagios web interface by running the following command in Terminal:

$ sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

Enter a password when prompted.

Step 9: Start Apache web server

Start Apache web server by running the following command in Terminal:

$ sudo apachectl start

Step 10: Access Nagios web interface

Open your web browser and go to http://localhost/nagios/

Login with the username nagiosadmin and the password you created in step 8.

Congratulations! You have successfully installed Nagios on macOS.

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