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

Kubernetes architecture

Kubernetes is made of a cluster of nodes. There are two possible roles for nodes in Kubernetes – control plane and worker nodes. The control plane nodes control the Kubernetes cluster as a whole, scheduling the workloads, listening to requests, and other aspects that help run your workloads and make the cluster function. They typically form the brain of the cluster.

On the other hand, the worker nodes are the powerhouses of the Kubernetes cluster and provide raw compute for running your container workloads.

Kubernetes architecture follows the client-server model via an API server. Any interaction, including internal interactions between components, happens via the Kubernetes API server. Therefore, the Kubernetes API server is known as the brain of the Kubernetes control plane.

There are other components of Kubernetes as well, but before we delve into the details, let's look at the following diagram to understand the high-level Kubernetes...