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Oracle Linux Cookbook

You're reading from   Oracle Linux Cookbook Embrace Oracle Linux and master Linux Server Management

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Product type Paperback
Published in Jan 2024
Publisher Packt
ISBN-13 9781803249285
Length 548 pages
Edition 1st Edition
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Authors (3):
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Erik Benner Erik Benner
Author Profile Icon Erik Benner
Erik Benner
Mr. Jonathan Spindel Mr. Jonathan Spindel
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Mr. Jonathan Spindel
Erik B. Thomsen Erik B. Thomsen
Author Profile Icon Erik B. Thomsen
Erik B. Thomsen
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Toc

Table of Contents (16) Chapters Close

Preface 1. Chapter 1: Oracle Linux 8 – Get It? Got It? Good! 2. Chapter 2: Installing with and without Automation Magic FREE CHAPTER 3. Chapter 3: Exploring the Various Boot Options and Kernels in Oracle Linux 4. Chapter 4: Creating and Managing Single-Instance Filesystems 5. Chapter 5: Software Management with DNF 6. Chapter 6: Eliminating All the SPOFs! An Exercise in Redundancy 7. Chapter 7: Oracle Linux 8 – Patching Doesn’t Have to Mean Rebooting 8. Chapter 8: DevOps Automation Tools – Terraform, Ansible, Packer, and More 9. Chapter 9: Keeping the Data Safe – Securing a System 10. Chapter 10: Revisiting Modules and AppStreams 11. Chapter 11: Lions, Tigers, and Containers – Oh My! Podman and Friends 12. Chapter 12: Navigating Ansible Waters 13. Chapter 13: Let’s All Go to the Cloud 14. Index 15. Other Books You May Enjoy

Leapping from Oracle Linux 7 to 8

A challenge system admins often face is what to do when you have an older OS deployed and it’s about to reach the date when support ends. It happens, and it’s not fun. This will put you in a position to reinstall the newer OS on new systems, and then migrate your workload over. For many systems, there is a better way known as Leapp.

Leapp allows you to upgrade your OS from Oracle Linux 7 to Oracle Linux 8. There is no need to reinstall everything on new systems. Leapping consists of two phases:

  • A pre-upgrade phase that checks the system to determine whether the software can be upgraded
  • A second phase that actually performs the upgrade

Sounds good. But there are a few things you need to know.

Getting ready

First, Leapping from 7 to 8 is not supported for all use cases. Table 1.1 shows what Oracle will support when performing the operation. Leapp does not always work well with complex applications, such as database...

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