Book Image

Oracle Linux Cookbook

By : Erik Benner, Erik B. Thomsen, Jonathan Spindel
Book Image

Oracle Linux Cookbook

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)

Using Packer to modify source images

Packer is a tool used for automating the creation of machine images. In this recipe, we’re going to use Packer to reference an Oracle Linux 8 platform image as its source, install something using a provisioner, and push up a new OCID image with these changes onto OCI.

Note

Although OCI features a free tier that contains “Always Free” resources, this does not include the ability to store images. If you wish to follow along with this recipe, you will need to use a paid account.

Getting ready

For this recipe, you will need the following:

  • Oracle Linux
  • Packer

Refer to the Technical requirements section at the beginning of this chapter if you need help installing Packer.

How to do it…

Packer is often overlooked because it seems so simple on the surface; however, don’t let this simplicity fool you – Packer is incredibly powerful and useful. In this recipe, we’re going...