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

Declarative infrastructure and config management

We've already looked at the chapters on Terraform and Ansible regarding declarative infrastructure and config management principles. In this chapter, we will use GitHub actions and Terraform to spin up a Google Kubernetes Engine instance. So far, we've been using gcloud commands to do this; however, because gcloud commands are not declarative, using them is not possible when implementing GitOps. Instead, we'll use Terraform to create the Kubernetes cluster for us. In the next chapter, we will also use the same cluster to understand other nuances of GitOps in more detail. For now, let's go ahead and create an environment repository.

Navigate to https://github.com and create a repository using a name of your choice. For this exercise, we will use gitops-environments. Once you have done that, navigate to Google Cloud Shell and clone the repository using the following command:

$ cd ~
$ git clone https://github.com...