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

Configuring Arista EOS switches with Ansible

Getting up and running with an Arista switch (or virtual switch) is left as an exercise f or you, but if you are interested in doing this in GNS3, a popular and freely available open source tool for learning about networks, there is some excellent guidance here:

You might be lucky enough to have an Arista EOS-based device at your fingertips, and that's fine too – the automation code in this section will work equally well in either case.

The following examples were created against an Arista vEOS device in GNS3, created using the instructions found in the aforementioned link. Upon booting the device for the first time, you will need to cancel ZeroTouch provisioning. To do this, log in with the admin username (the password is blank by default) and enter the following command:

zerotouch cancel

The virtual device will reboot, and when it comes up again, log in using...