Book Image

Modern DevOps Practices - Second Edition

By : Gaurav Agarwal
Book Image

Modern DevOps Practices - Second Edition

By: Gaurav Agarwal

Overview of this book

DevOps and the cloud have changed how we look at software development and operations like never before, leading to the rapid growth of various DevOps tools, techniques, and practices. This updated edition helps you pick up the right tools by providing you with everything you need to get started with your DevOps journey. The book begins by introducing you to modern cloud-native architecture, and then teaches you about the architectural concepts needed to implement the modern way of application development. The next set of chapters helps you get familiarized with Git, Docker, Kubernetes, Ansible, Terraform, Packer, and other similar tools to enable you to build a base. As you advance, you’ll explore the core elements of cloud integration—AWS ECS, GKE, and other CaaS services. The chapters also discuss GitOps, continuous integration, and continuous delivery—GitHub actions, Jenkins, and Argo CD—to help you understand the essence of modern app delivery. Later, you’ll operate your container app in production using a service mesh and apply AI in DevOps. Throughout the book, you’ll discover best practices for automating and managing your development lifecycle, infrastructure, containers, and more. By the end of this DevOps book, you'll be well-equipped to develop and operate applications using modern tools and techniques.
Table of Contents (24 chapters)
1
Part 1:Modern DevOps Fundamentals
6
Part 2:Container Orchestration and Serverless
10
Part 3:Managing Config and Infrastructure
14
Part 4:Delivering Applications with GitOps
18
Part 5:Operating Applications in Production

Building the Apache and MySQL images using Packer and Ansible provisioners

We will now use Packer to create the Apache and MySQL images. Before defining the Packer configuration, we have a few prerequisites to allow Packer to build custom images.

Prerequisites

We must create an Azure service principal for Packer to interact with Azure and build the image.

First, log in to your Azure account using the Azure CLI with the following command:

$ az login

Now, set the subscription to the subscription ID we got in response to the az login command to an environment variable using the following:

$ export SUBSCRIPTION_ID=<SUBSCRIPTION_ID>

Next, let’s set the subscription ID using the following command:

$ az account set --subscription="${SUBSCRIPTION_ID}"

Then, create the service principal with contributor access using the following command:

$ az ad sp create-for-rbac --role="Contributor" \
--scopes="/subscriptions/${SUBSCRIPTION_ID...