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

Understanding Helm Templates

One of the fundamental features of Helm is to create and maintain the Kubernetes resources that comprise an application. Helm accomplishes this with a concept called templates. Templates represent the core component comprising Helm charts, as they are used to configure Kubernetes resources based on a given set of values.

In Chapter 4, Scaffolding a New Helm Chart, you scaffolded a new Helm chart by using the helm create command, which created basic templates under the chart’s templates/ folder. In this chapter, we will dive deep into the world of Helm templates, and at the end, we will revisit the scaffolded templates to make improvements and deploy the Guestbook frontend. By the end of the chapter, your Helm chart will be able to deploy the full Guestbook architecture—from the Redis backend added in Chapter 5, Helm Dependency Management, to the frontend that we will add later in this chapter.

Here are the main topics for this chapter...