How to Install Adagios on Fedora CoreOS Latest

Adagios is an open-source web-based Nagios configuration interface that makes it easier to manage your Nagios configuration files. In this tutorial, we will guide you through the process of installing Adagios on the latest version of Fedora CoreOS.

Prerequisites

Before we proceed with the installation, ensure that you have the following:

• A running instance of Fedora CoreOS with sudo privileges.
• A web browser to access Adagios web interface.

Step 1: Install Required Dependencies

First, update the system's package list by running the following command.

sudo dnf update

Next, install the required dependencies for Adagios:

sudo dnf install epel-release
sudo dnf install python3-pip httpd mod_wsgi nagios nagios-plugins-all nagios-plugins-nrpe nagios-plugins-perl nagios-plugins-ssh nagios-plugins-mysql

Step 2: Install Adagios

Once the dependencies are installed, it's time to install Adagios. We will install it using pip package manager.

sudo pip3 install adagios

Step 3: Configure Apache

We need to configure Apache to serve Adagios web interface. Create a new Apache configuration file for Adagios.

sudo vi /etc/httpd/conf.d/adagios.conf

Add the following configuration:

<VirtualHost *:80>

    ServerAdmin webmaster@localhost
    DocumentRoot /var/www/html/adagios

    <Directory /var/www/html/adagios>
        Options FollowSymLinks
        AllowOverride None
        Require all granted
    </Directory>

    ErrorLog ${APACHE_LOG_DIR}/adagios_error.log
    CustomLog ${APACHE_LOG_DIR}/adagios_access.log combined

    WSGIDaemonProcess adagios user=apache group=apache processes=2 threads=5 python-path=/usr/local/lib/python3.6/site-packages
    WSGIScriptAlias / /var/www/html/adagios/adagios.wsgi

    <Directory /var/www/html/adagios>
        WSGIProcessGroup adagios
        WSGIApplicationGroup %{GLOBAL}
        Order deny,allow
        Allow from all
    </Directory>
</VirtualHost>

Save and exit the file by pressing Esc, followed by :wq.

Next, restart Apache for the configuration changes to take effect.

sudo systemctl restart httpd

Step 4: Create a new Adagios user account

By default, Adagios uses Nagios's htpasswd authentication mechanism. We will first create a new user and then use it to log in to Adagios.

Run the following command to create a new user named adagiosadmin:

sudo htpasswd -c /usr/local/nagios/etc/htpasswd.users adagiosadmin

Enter and confirm the password for the new user when prompted.

Step 5: Configure Adagios

We have successfully installed and configured Apache and created a new user account. Now, it's time to configure Adagios.

Create a new Adagios configuration file by copying the sample configuration file.

sudo cp /usr/local/adagios/etc/adagios.conf-sample /usr/local/adagios/etc/adagios.conf

Edit the configuration file and update the following settings.

vim /usr/local/adagios/etc/adagios.conf

Update Nagios Bin Path

Nagios Bin Path: /usr/sbin/nagios

Set Authentication Settings

Authentication Settings:

   users_file /usr/local/nagios/etc/htpasswd.users
   group_file /usr/local/nagios/etc/group.cfg
   contact_groups_file /usr/local/nagios/etc/contactgroups.cfg
   enable_auto_auth false

Set Nagios Configuration Path

Nagios Configuration Path: /usr/local/nagios/etc/nagios.cfg

Save and exit the file using :wq.

Step 6: Generate Adagios Configuration Files

To generate the Adagios configuration files, run the following command.

sudo adagios generate

Step 7: Log in to Adagios

You can now log in to Adagios using your web browser by visiting the following URL.

http://your-server-ip/adagios

Enter the username and password for the Adagios user account to log in.

Conclusion

In this tutorial, you learned how to install Adagios on the latest version of Fedora CoreOS. With a few simple steps, you now have a web-based interface that makes it easy to manage your Nagios configuration files.

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