Linux Administration Cookbook

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Here, we spun up a Nagios and Icinga2 installation quickly, to show what both are capable of with a few simple commands. These configurations aren't production-ready, and consideration should be given to things such as reusable patterns for monitoring checks, as well as security (for things such as TLS on the GUI, and utilizing secure communication methods between the master and the clients).

As with a lot of the software in this book, you should now have a good understanding of how to get started, but should consider all your options when implementing a solution for your own systems. If you have a relatively small pool to monitor, and it's unlikely to grow, you might considers the Nagios file-based monitoring setup suitable; ...