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

Summary

And we've come to the end of an eventful chapter and also the end of the book. We deep-dived into GitOps and looked at application management and the end-to-end GitOps life cycle using CI/CD pipelines. We started with the CI of a simple Flask application with GitHub Actions. We then discussed release gating with pull requests and then learned about CD in GitOps with a hands-on exercise with Flux CD. We then covered managing sensitive configuration and Secrets with Sealed Secrets. Throughout the chapter, we created all services, including the CI/CD pipelines, with code, and therefore implemented pure GitOps.

GitOps is a fantastic way of implementing modern DevOps. It is always fruitful in the long run as it is easy to implement, requires very little documentation, and the best part is that you have working code for every bit of infrastructure and software you're running. So, if you lose your entire estate but have your code and data, you can spin up everything from...