Book Image

Red Hat Enterprise Linux Server Cookbook

By : Jakub Gaj, Leemans
5 (1)
Book Image

Red Hat Enterprise Linux Server Cookbook

5 (1)
By: Jakub Gaj, Leemans

Overview of this book

Dominating the server market, the Red Hat Enterprise Linux operating system gives you the support you need to modernize your infrastructure and boost your organization’s efficiency. Combining both stability and flexibility, RHEL helps you meet the challenges of today and adapt to the demands of tomorrow. This practical Cookbook guide will help you get to grips with RHEL 7 Server and automating its installation. Designed to provide targeted assistance through hands-on recipe guidance, it will introduce you to everything you need to know about KVM guests and deploying multiple standardized RHEL systems effortlessly. Get practical reference advice that will make complex networks setups look like child’s play, and dive into in-depth coverage of configuring a RHEL system. Also including full recipe coverage of how to set up, configuring, and troubleshoot SELinux, you’ll also discover how secure your operating system, as well as how to monitor it.
Table of Contents (12 chapters)
11
Index

Introduction


Puppet is an "old school" configuration management tool. It helps you enforce configurations with great ease although it is more complex than Ansible to use. Puppet's declarative language can be compared to a programming language and is difficult to master. However, once you understand how it works, it's fairly easy to use.

Puppet is very good at maintaining a strict set of configurations, but if you aim at verifying the configurations before applying them, you'll find that Puppet is not the sharpest tool in the shed. Puppet does have the audit metaparameter that you can use in your resources to track changes, but it doesn't let you display where it differs from your manifest. In fact it doesn't allow you to add the audit metaparameter to your "active" module or manifests. It sits in a separate manifest that audits the requested resources.

The version of Puppet used in these recipes is v3.8 and covers the community edition.