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

Installing tools

Before we deep dive into installing Docker, we need to install supporting tools for us to progress. So, let's first install Git and vim.

Git is the command-line tool that will help you clone code from Git repositories. We will use several repositories for our exercises in future chapters.

Vim is a popular text editor for Linux and Unix operating systems, and we will use it extensively in this and the coming chapters. There are alternatives to vim, such as the GNU nano editor, VS Code, and Sublime Text. Feel free to use whatever you are comfortable with.

Installing Git

Open your shell terminal and run the following command:

$ sudo apt update -y && sudo apt install -y git 

Tip

If you get an output such as E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?, that's because apt update is already running, so you should wait for 5 minutes and then retry.

To confirm that Git is...