Book Image

Learn Helm

By : Andrew Block, Austin Dewey
Book Image

Learn Helm

By: Andrew Block, Austin Dewey

Overview of this book

Containerization is currently known to be one of the best ways to implement DevOps. While Docker introduced containers and changed the DevOps era, Google developed an extensive container orchestration system, Kubernetes, which is now considered the frontrunner in container orchestration. With the help of this book, you’ll explore the efficiency of managing applications running on Kubernetes using Helm. Starting with a short introduction to Helm and how it can benefit the entire container environment, you’ll then delve into the architectural aspects, in addition to learning about Helm charts and its use cases. You’ll understand how to write Helm charts in order to automate application deployment on Kubernetes. Focused on providing enterprise-ready patterns relating to Helm and automation, the book covers best practices for application development, delivery, and lifecycle management with Helm. By the end of this Kubernetes book, you will have learned how to leverage Helm to develop an enterprise pattern for application delivery.
Table of Contents (15 chapters)
Section 1: Introduction and Setup
Section 2: Helm Chart Development
Section 3: Adanced Deployment Patterns
Other Books You May Enjoy


In this chapter, you learned how to install a Helm chart and manage its life cycle. We began by searching Helm Hub for a WordPress chart to install. After locating a chart, the repository containing the chart was added by following the instructions from its Helm 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, 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 performed a rollback after this 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 chart consumer. You used Helm as a package manager to install a Kubernetes application to your cluster. You also managed the life cycle of the application...