Book Image

DevOps Automation Cookbook

By : Michael Duffy
Book Image

DevOps Automation Cookbook

By: Michael Duffy

Overview of this book

<p>There has been a recent explosion in tools that allow you to redefine the delivery of infrastructure and applications, using a combination of automation and testing to deliver continuous deployment. DevOps has garnered interest from every quarter, and is rapidly being recognized as a radical shift, as large as the Agile movement for the delivery of software.</p> <p>This book takes a collection of some of the coolest software available today and shows you how to use it to create impressive changes to the way you deliver applications and software. It tackles the plethora of tools that are now available to enable organizations to take advantage of the automation, monitoring, and configuration management techniques that define a DevOps-driven infrastructure.</p> <p>Starting off with the fundamental command-line tools that every DevOps enthusiast must know, this book will guide you through the implementation of the Ansible tool to help you facilitate automation and perform diverse tasks. You will explore how to build hosts automatically with the creation of Apt mirrors and interactive pre-seeds, which are of the utmost importance for Ubuntu automation. You will also delve into the concept of virtualization and creating and manipulating guests with ESXi. Following this, you will venture into the application of Docker; learn how to install, run, network, and restore Docker containers; and also learn how to build containers in Jenkins and deploy apps using a combination of Ansible, Docker, and Jenkins. You will also discover how to filter data with Grafana and the usage of InfluxDB along with unconventional log management. Finally, you will get acquainted with cloud infrastructure, employing the Heroku and Amazon AWS platforms.</p> <p>By tackling real-world issues, this book will guide you through a huge variety of tools, giving new users the ability to get up and running and offering advanced users some interesting recipes that may help with existing issues.</p>
Table of Contents (19 chapters)
DevOps Automation Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Installing and managing HAProxy with Ansible


One key element of high-performance web applications is the ability to scale, and the easiest way to achieve this is to use a load balancer to direct traffic to multiple nodes. This can provide both horizontal scale and, just as importantly, the ability to survive individual node failures.

There are many load balancers available, both open source and commercial, but HAProxy is certainly one of the more popular. Open Source, high performance, and highly configurable, HAProxy is a good choice for any site that requires load balancing.

This recipe will demonstrate how to install HAProxy, configure it, and add both a frontend and backend service to it.

Getting ready

For this recipe, you need an Ubuntu 14.04 server to act as our Ansible client and an Ubuntu 14.04 server that you wish to configure for HAProxy.

How to do it…

Let's install and manage HAProxy and Ansible:

  1. We are going to use the ansible-galaxy command to create our role scaffold. Do this by issuing...