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Practical Ansible 2

Practical Ansible 2

By : Daniel Oh, Oh Se Young, James Freeman, Fabio Alessandro Locati
3.8 (5)
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Practical Ansible 2

Practical Ansible 2

3.8 (5)
By: Daniel Oh, Oh Se Young, 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)
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1
Section 1: Learning the Fundamentals of Ansible
6
Section 2: Expanding the Capabilities of Ansible
11
Section 3: Using Ansible in an Enterprise

Summary

Creating and managing Ansible inventories is a crucial part of your work with Ansible, and hence we have covered this fundamental concept early in this book. They are vital as without them Ansible would have no knowledge of what hosts it is to run automation tasks against, yet they provide so much more than this. They provide an integration point with configuration management systems, they provide a sensible source for host-specific (or group-specific) variables to be stored, and they provide you with a flexible way of running this playbook.

In this chapter, you learned about creating simple static inventory files and adding hosts to them. We then extended this by learning how to add host groups and assign variables to hosts. We also looked at how to organize your inventories and variables when a single flat inventory file becomes too much to handle. We then learned how...

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