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


In this chapter, you learned about different methods you can apply to test your Helm charts. The most basic way to test a chart is to run the helm template command against a local chart directory and determine whether its resources were generated. You can also use the helm lint command to ensure that your chart follows the correct formatting for Helm resources, and you can use the yamllint command to lint the YAML style that’s used in your chart.

Apart from local templating and linting, you can also perform live tests on a Kubernetes environment with the helm test command and the ct tool. In addition to performing basic chart testing capabilities, ct also provides features that make it easier to maintain Helm charts in a monorepo.

In the next chapter, you will learn how Helm can be used within a continuous delivery (CD) and GitOps setting.