Book Image

Implementing DevOps with Ansible 2

By : Jonathan McAllister
Book Image

Implementing DevOps with Ansible 2

By: Jonathan McAllister

Overview of this book

Thinking about adapting the DevOps culture for your organization using a very simple, yet powerful automation tool, Ansible 2? Then this book is for you! In this book, you will start with the role of Ansible in the DevOps module, which covers fundamental DevOps practices and how Ansible is leveraged by DevOps organizations to implement consistent and simplified configuration management and deployment. You will then move on to the next module, Ansible with DevOps, where you will understand Ansible fundamentals and how Ansible Playbooks can be used for simple configuration management and deployment tasks. After simpler tasks, you will move on to the third module, Ansible Syntax and Playbook Development, where you will learn advanced configuration management implementations, and use Ansible Vault to secure top-secret information in your organization. In this module, you will also learn about popular DevOps tools and the support that Ansible provides for them (MYSQL, NGINX, APACHE and so on). The last module, Scaling Ansible for the enterprise, is where you will integrate Ansible with CI and CD solutions and provision Docker containers using Ansible. By the end of the book you will have learned to use Ansible to leverage your DevOps tasks.

Related Content you might be interested in

Current Title:

Small book image
Implementing DevOps with Ansible 2
Jonathan McAllister
Jul, 2017 | 266 pages
Small book image
Practical Ansible 2
Fabio Alessandro Locati | Daniel Oh | James Freeman
Jun, 2020 | 410 pages
Small book image
Ansible Quick Start Guide
Mohamed Alibi
Sep, 2018 | 214 pages
Small book image
Practical Ansible
Fabio Alessandro Locati | Daniel Oh | James Freeman
Sep, 2023 | 420 pages
Table of Contents (20 chapters)
Title Page
Title Page
Credits
Credits
About the Author
About the Author
Acknowledgments
Acknowledgments
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Customer Feedback
Customer Feedback
Preface
Preface
Free Chapter
1
DevOps Fundamentals
DevOps Fundamentals
DevOps 101
The History of DevOps
DevOps in the Modern Software Organization
Summary
2
Configuration Management Essentials
Configuration Management Essentials
Understanding Configuration Management
Origins of Configuration Management
The Aims of Configuration Management
Basic Principles of Configuration Management
Configuration Management Best Practices
How Ansible Simplifies DevOps Implementations
Binary Artifact Management and Ansible
Summary
3
Installing, Configuring, and Running Ansible
Installing, Configuring, and Running Ansible
Installing Ansible
The Ansible Architecture
The Ansible Command-Line Interface
Configuring Ansible
The Ansible Inventory
Summary
4
Playbooks and Inventory Files
Playbooks and Inventory Files
Ansible Playbook Constructs
Ansible Play's and Task's
Variables and Variable Files
Hosts and Inventory
Targeting Infrastructure
Ansible Modules
Summary
5
Playbooks – Beyond the Fundamentals
Playbooks – Beyond the Fundamentals
playbook's and Conditional Logic
Iterators and Loops
Includes
Ansible Roles
Ansible Register Variables
Ansible Handlers
Summary
6
Jinja in Ansible
Jinja in Ansible
Introducing Jinja
Jinja2 Programming Constructs
Applying Jinja in Ansible Playbook's
Summary
7
Ansible Vault
Ansible Vault
The Ansible Vault Architecture
Basic Vault Usage
Real-world Ansible Vault Workflow
Summary
8
Ansible Modules and Libraries
Ansible Modules and Libraries
Introducing Ansible Modules
Integrating Ansible with Other Technologies
Summary
9
Integrating Ansible with CI and CD Solutions
Integrating Ansible with CI and CD Solutions
Overview of Continuous Integration
Overview of Continuous Delivery
Ansible's Role in CI->CD
Integrating Ansible with Jenkins
Integrating Ansible with Vagrant
Summary
10
Ansible and Docker
Ansible and Docker
Understanding Docker's Architecture
Managing Docker Containers with Ansible
Using Ansible to Create Docker Images
Managing Docker Images with Ansible
Gathering Facts About Docker Containers
Summary
11
Extending Ansible
Extending Ansible
Understanding Ansible Plugins and its Architecture
Setting Up the Ansible Module Development Environment
Developing Hello World Ansible Module
Setting up the Ansible Plugin Development Environment
Understanding the Different Types of Plugins
Summary
12
Ansible Galaxy
Ansible Galaxy
Ansible Galaxy Fundamentals
Summary

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...

Previous Section
End of Section 2
Next Section