Book Image

Learning Ansible 2.7 - Third Edition

By : Fabio Alessandro Locati
Book Image

Learning Ansible 2.7 - Third Edition

By: Fabio Alessandro Locati

Overview of this book

Ansible is an open source automation platform that assists organizations with tasks such as application deployment, orchestration, and task automation. With the release of Ansible 2.7, even complex tasks can be handled much more easily than before. Learning Ansible 2.7 will help you take your first steps toward understanding the fundamentals and practical aspects of Ansible by introducing you to topics such as playbooks, modules, and the installation of Linux, Berkeley Software Distribution (BSD), and Windows support. In addition to this, you will focus on various testing strategies, deployment, and orchestration to build on your knowledge. The book will then help you get accustomed to features including cleaner architecture, task blocks, and playbook parsing, which can help you to streamline automation processes. Next, you will learn how to integrate Ansible with cloud platforms such as Amazon Web Services (AWS) before gaining insights into the enterprise versions of Ansible, Ansible Tower and Ansible Galaxy. This will help you to use Ansible to interact with different operating systems and improve your working efficiency. By the end of this book, you will be equipped with the Ansible skills you need to automate complex tasks for your organization.
Table of Contents (18 chapters)
Free Chapter
1
Section 1: Creating a Web Server Using Ansible
4
Section 2: Deploying Playbooks in a Production Environment
9
Section 3: Deploying an Application with Ansible
13
Section 4: Deploying an Application with Ansible

Configuring a basic server

After we have created the user for Ansible with the necessary privileges, we can go on to make some other small changes to the OS. To make it clearer, we will see how each action is performed, and then we'll look at the whole playbook.

Enabling EPEL

EPEL is the most important repository for Enterprise Linux and it contains a lot of additional packages. It's also a safe repository, since no package in EPEL will conflict with packages in the base repository.

To enable EPEL in RHEL/CentOS 7, it is enough to just install the epel-release package. To do so in Ansible, we will use the following:

- name: Ensure EPEL is enabled 
  yum: 
    name: epel-release 
    state: present 
  become: True...