Book Image

Modern DevOps Practices

By : Gaurav Agarwal
Book Image

Modern DevOps Practices

By: Gaurav Agarwal

Overview of this book

Containers have entirely changed how developers and end-users see applications as a whole. With this book, you'll learn all about containers, their architecture and benefits, and how to implement them within your development lifecycle. You'll discover how you can transition from the traditional world of virtual machines and adopt modern ways of using DevOps to ship a package of software continuously. Starting with a quick refresher on the core concepts of containers, you'll move on to study the architectural concepts to implement modern ways of application development. You'll cover topics around Docker, Kubernetes, Ansible, Terraform, Packer, and other similar tools that will help you to build a base. As you advance, the book covers the core elements of cloud integration (AWS ECS, GKE, and other CaaS services), continuous integration, and continuous delivery (GitHub actions, Jenkins, and Spinnaker) to help you understand the essence of container management and delivery. The later sections of the book will take you through container pipeline security and GitOps (Flux CD and Terraform). By the end of this DevOps book, you'll have learned best practices for automating your development lifecycle and making the most of containers, infrastructure automation, and CaaS, and be ready to develop applications using modern tools and techniques.
Table of Contents (19 chapters)
1
Section 1: Container Fundamentals and Best Practices
7
Section 2: Delivering Containers
15
Section 3: Modern DevOps with GitOps

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 would need to create a service principal for Packer to interact with Azure and build the image.

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

$ az login

Now, set the subscription to the subscription id we got in response to az login 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>"Creating ‘Contributor' role assignment under scope ‘/subscriptions/<SUBSCRIPTION_ID>'  Retrying...