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

Testing your application within the CD pipeline

Until now, we’ve deployed our application on a Kubernetes cluster and manually verified that it is running. We have two options moving forward: either proceed with manual testing or create automated tests, also known as a test suite. While manual testing is the traditional approach, DevOps heavily emphasizes automating tests to integrate them into your CD pipeline. This way, we can eliminate many repetitive tasks, often called toil.

We’ve developed a Python-based integration test suite for our application, covering various scenarios. One significant advantage of this test suite is that it treats the application as a black box. It remains unaware of how the application is implemented, focusing solely on simulating end user interactions. This approach provides valuable insights into the application’s functional aspects.

Furthermore, since this is an integration test, it assesses the entire application as a cohesive...