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Oracle Linux Cookbook

Oracle Linux Cookbook

By : Erik Benner, Erik B. Thomsen, Jonathan Spindel
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Oracle Linux Cookbook

Oracle Linux Cookbook

5 (4)
By: Erik Benner, Erik B. Thomsen, Jonathan Spindel

Overview of this book

Discover the power of Oracle Linux 8, the free and enterprise-grade Linux distribution designed for use in any environment, with this recipe-style book. Starting with instructions on how to obtain Oracle Linux for both X86 and ARM-based platforms, this book walks you through various installation methods, from running it as a Windows service to installing it on a Raspberry Pi. It unravels advanced topics such as system upgrades using Leapp for major version transitions and using a PXE server and kickstart files for more advanced installations. The book then delves into swapping kernels to take advantage of Oracle’s UEK, exploring boot options, managing software with DNF, and achieving high availability. Detailed recipes involving security topics will assist with tasks such as data encryption, both at rest and in motion. For developers, it offers guidance on building RPM files, using Docker and Podman in a containerized environment, working with AppStreams, and more. For large-scale deployments, the book introduces Oracle Linux Automation Manager for enterprise-level Ansible utilization, from setting up the Ansible server to basic playbook writing. Finally, you’ll discover strategies for cloud migration. By the end of this book, you’ll possess a comprehensive toolkit that will elevate your skills as a Linux administrator.
Table of Contents (16 chapters)
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Creating portable roles for Ansible

Before attempting to follow this recipe, I recommend having some basic knowledge of Ansible and how to write an Ansible playbook. If you’ve never written an Ansible playbook, I recommend following the Creating a playbook guide from the official Ansible documentation. That can be found here: https://docs.ansible.com/ansible/latest/getting_started/get_started_playbook.html.

In this recipe, you will learn how easy it is to move things around when using Ansible roles. When I first started using Ansible, I wrote my playbooks using tasks only. This to me seemed like a logical approach at the time and was more akin to traditional scripting since everything happened in chronological order.

The problem with writing playbooks in this way is there are no clear dependencies, and the tasks are defined along with the hosts, all in the same file. If you wanted to move things to another playbook, you’d have to be careful to grab the correct dependencies...

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