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)
1
Part 1: Introduction and Setup
5
Part 2: Helm Chart Development
12
Part 3: Advanced Deployment Patterns

Summary

In this chapter, you learned how to install a Helm chart and manage its life cycle. We began by searching Artifact Hub for a WordPress chart to install. After locating a chart, the repository containing the chart was added by following the instructions from its Artifact Hub page. We then proceeded to inspect the WordPress chart to create a set of values that overrides their defaults. These values were saved to a values file called wordpress-values.yaml, which was then provided during the installation.

After the chart was installed, we used helm upgrade to upgrade the release by providing additional values. We then performed a rollback with helm rollback to restore the chart to a previous state. Finally, we removed the WordPress release at the end of the exercise with helm uninstall.

This chapter taught you how to leverage Helm as an end user, and how to use an already-written Helm chart. In the next chapter, we will explore the concepts and structure of a Helm chart in...