Book Image

Mastering Ansible, 4th Edition - Fourth Edition

By : James Freeman, Jesse Keating
Book Image

Mastering Ansible, 4th Edition - Fourth Edition

By: James Freeman, Jesse Keating

Overview of this book

Ansible is a modern, YAML-based automation tool (built on top of Python, one of the world’s most popular programming languages) with a massive and ever-growing user base. Its popularity and Python underpinnings make it essential learning for all in the DevOps space. This fourth edition of Mastering Ansible provides complete coverage of Ansible automation, from the design and architecture of the tool and basic automation with playbooks to writing and debugging your own Python-based extensions. You'll learn how to build automation workflows with Ansible’s extensive built-in library of collections, modules, and plugins. You'll then look at extending the modules and plugins with Python-based code and even build your own collections — ultimately learning how to give back to the Ansible community. By the end of this Ansible book, you'll be confident in all aspects of Ansible automation, from the fundamentals of playbook design to getting under the hood and extending and adapting Ansible to solve new automation challenges.
Table of Contents (18 chapters)
Section 1: Ansible Overview and Fundamentals
Section 2: Writing and Troubleshooting Ansible Playbooks
Section 3: Orchestration with Ansible

Upgrading from earlier Ansible installations

The splitting of Ansible into two packages, one of which is dependent on the other, has created some headaches for package maintainers. Whereas packages were readily available for CentOS and RHEL, there are no current packages of Ansible 4.3.0 or ansible-core 2.11.1. A quick look inside the EPEL packages directory for CentOS/RHEL 8 shows that the latest RPM available for Ansible is version 2.9.18. The official Ansible installation guide goes further:

Since Ansible 2.10 for RHEL is not available at this time, continue to use Ansible 2.9.

This will change in due course as package maintainers work out the pros and cons of the various upgrade paths and packaging technologies, but at the time of writing, there is a very clear expectation on your upgrade path if you want to get started with Ansible 4.3.0 now, and the easiest way to get your hands on this latest and greatest release is to install it using the Python packaging technology,...