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Implementing DevOps with Ansible 2

You're reading from   Implementing DevOps with Ansible 2 A step-by-step guide to automating all DevOps stages with ease using Ansible

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Product type Paperback
Published in Jul 2017
Publisher Packt
ISBN-13 9781787120532
Length 266 pages
Edition 1st Edition
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Author (1):
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Jonathan McAllister Jonathan McAllister
Author Profile Icon Jonathan McAllister
Jonathan McAllister
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Table of Contents (13) Chapters Close

Preface 1. DevOps Fundamentals FREE CHAPTER 2. Configuration Management Essentials 3. Installing, Configuring, and Running Ansible 4. Playbooks and Inventory Files 5. Playbooks – Beyond the Fundamentals 6. Jinja in Ansible 7. Ansible Vault 8. Ansible Modules and Libraries 9. Integrating Ansible with CI and CD Solutions 10. Ansible and Docker 11. Extending Ansible 12. Ansible Galaxy

playbook's and Conditional Logic


Ansible provides a nice integrated way of performing conditional operations. That is to say, a task can be executed when a given condition is met. Some examples of this type of requirement might be to only execute a task if the target system is Ubuntu or only execute a task if the target system has a specific processor architecture.

Ansible supports conditionals through the implementation of the when operator. In this section, we will take a look at how Ansible manages conditionals and tour through an example of managing tasks through a condition. Let's start with this code:

# Reboot Debian Flavored Linux Systems using the WHEN operator tasks:
- name: "Reboot all Debian flavored Linux systems"
command: /sbin/reboot -t now
when: Ansible_os_family == "Debian"

In this example, we conditionally specify the Debian family as the requirement for the task to run. Simple enough, right? In addition to the example using the Ansible_os_family implementation, we can also...

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