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Mastering Ansible

Mastering Ansible

4.6 (15)
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Mastering Ansible

Mastering Ansible

4.6 (15)

Overview of this book

Automation is critical to success in the world of DevOps. How quickly and efficiently an application deployment can be automated, or a new infrastructure can be built up, can be the difference between a successful product or a failure. Ansible provides a simple yet powerful automation engine. Beyond the basics of Ansible lie a host of advanced features which are available to help you increase efficiency and accomplish complex orchestrations with ease. This book provides you with the knowledge you need to understand how Ansible works at a fundamental level and leverage its advanced capabilities. You'll learn how to encrypt Ansible content at rest and decrypt data at runtime. You will master the advanced features and capabilities required to tackle the complex automation challenges of today and beyond. You will gain detailed knowledge of Ansible workflows, explore use cases for advanced features, craft well thought out orchestrations, troubleshoot unexpected behaviour, and extend Ansible through customizations. Finally, you will discover the methods used to examine and debug Ansible operations, helping you to understand and resolve issues.
Table of Contents (10 chapters)
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Task, handler, variable, and playbook include concepts

The first step to understanding how to efficiently organize an Ansible project structure is to master the concept of including files. The act of including files allows content to be defined in a topic specific file that can be included into other files one or more times within a project. This inclusion feature supports the concept of DRY (Don't Repeat Yourself).

Including tasks

Task files are YAML files that define one or more tasks. These tasks are not directly tied to any particular play or playbook; they exist purely as a list of tasks. These files can be referenced by playbooks or other task files by way of the include operator. This operator takes a path to a task file, and as we learned in Chapter 1, System Architecture and Design of Ansible, the path can be relative from the file referencing it.

To demonstrate how to use the include operator to include tasks, let's create a simple play that includes a task file with some...

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