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

Horizontal Pod autoscaling

Imagine you’re the manager of a snack bar at a park. On a sunny day, lots of people come to enjoy the park, and they all want snacks. Now, you have a few workers at your snack bar who make and serve the snacks.

Horizontal Pod autoscaling in Kubernetes is like having magical helpers who adjust the number of snack makers (pods) based on how many people want snacks (traffic).

Here’s how it works:

  • Average days: You might only need one or two snack makers on regular days with fewer people. In Kubernetes terms, you have a few pods running your application.
  • Busy days: But when it’s a sunny weekend, and everyone rushes to the park, more people want snacks. Your magical helpers (Horizontal Pod autoscaling) notice the increase in demand. They say, “We need more snack makers!” So, more snack makers (pods) are added automatically to handle the rush.
  • Scaling down: Once the sun sets and the crowd leaves, you don...