Book Image

Managing Kubernetes Resources Using Helm - Second Edition

By : Andrew Block, Austin Dewey
Book Image

Managing Kubernetes Resources Using Helm - Second Edition

By: Andrew Block, Austin Dewey

Overview of this book

Containerization is one of the best ways to implement DevOps, and learning how to execute it effectively is an essential part of a developer’s skillset. Kubernetes is the current industry standard for container orchestration. This book will help you discover the efficiency of managing applications running on Kubernetes with Helm. Starting with a brief introduction to Helm and its impact on users working with containers and Kubernetes, you’ll delve into the primitives of Helm charts and their architecture and use cases. From there, you’ll understand how to write Helm charts in order to automate application deployment on Kubernetes and work your way toward more advanced strategies. These enterprise-ready patterns are focused on concepts beyond the basics so that you can use Helm optimally, looking at topics related to automation, application development, delivery, lifecycle management, and security. By the end of this book, you’ll have learned how to leverage Helm to build, deploy, and manage applications on Kubernetes.
Table of Contents (18 chapters)
Part 1: Introduction and Setup
Part 2: Helm Chart Development
Part 3: Advanced Deployment Patterns

Scaffolding a New Helm Chart

In the previous chapter, you learned how to use Helm from an end user perspective, leveraging it as a package manager to install applications to Kubernetes. Leveraging Helm in this fashion required you to understand how to use the Helm life cycle commands (install, upgrade, rollback, and uninstall), but it did not require you to understand how the Helm chart itself was built. While an understanding of the Helm CLI commands is necessary to install and manage applications installed by Helm, that level of knowledge alone will not allow you to package your own applications into Helm charts.

In the second part of this book, starting with this chapter, we will switch gears away from being a Helm chart end user and transition into becoming a Helm chart developer. We will accomplish this by building a Helm chart from scratch over the next few chapters that deploys an instance of the Guestbook application, a commonly used sample application within the Kubernetes...