Book Image

Practical Ansible 2

By : Daniel Oh, James Freeman, Fabio Alessandro Locati
Book Image

Practical Ansible 2

By: Daniel Oh, James Freeman, Fabio Alessandro Locati

Overview of this book

Ansible enables you to automate software provisioning, configuration management, and application roll-outs, and can be used as a deployment and orchestration tool. While Ansible provides simple yet powerful features to automate multi-layer environments using agentless communication, it can also solve other critical IT challenges, such as ensuring continuous integration and continuous deployment (CI/CD) with zero downtime. In this book, you'll work with Ansible 2.9 and learn to solve complex issues quickly with the help of task-oriented scenarios. You'll start by installing and configuring Ansible on Linux and macOS to automate monotonous and repetitive IT tasks and get to grips with concepts such as playbooks, inventories, and network modules. As you progress, you'll gain insight into the YAML syntax and learn how to port between Ansible versions. In addition to this, you'll also understand how Ansible enables you to orchestrate multi-layer environments such as networks, containers, and the cloud. By the end of this Ansible book, you'll be well - versed in writing playbooks and other related Ansible code to overcome just about all of your IT challenges, from infrastructure-as-code provisioning to application deployments, and even handling the mundane day-to-day maintenance tasks that take up so much valuable time.
Table of Contents (18 chapters)
Section 1: Learning the Fundamentals of Ansible
Section 2: Expanding the Capabilities of Ansible
Section 3: Using Ansible in an Enterprise

Playbooks and Roles

So far in this book, we have worked mostly with ad hoc Ansible commands for simplicity and to help you to understand the fundamentals. However, the lifeblood of Ansible is most certainly the playbook, which is a logical organization of tasks (think ad hoc commands) in a structure that creates a useful outcome. This might be to deploy a web server on a newly built virtual machine, or it might be to apply a security policy. It might even handle the whole build process for a virtual machine! The possibilities are endless. Ansible playbooks, as we have already covered, are designed to be simple to write and easy to read—they are intended to be self-documenting and, as such, will form a valuable part of your IT processes.

In this chapter, we will explore playbooks in greater depth, from the basics of their creation to more advanced concepts such as running...