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

Documenting a Helm chart

As with any other software that users interact with, a Helm chart should be properly documented so that users know how to interact with it. The Helm chart structure supports a file for documenting usage, a LICENSE file for covering usage and distribution rights, and a templates/NOTES.txt file for generating usage instructions during chart installation.

The File

README is a file commonly used in software development to describe the installation, usage, and other details of a product. A Helm chart's README file often contains the following details:

  • Prerequisites: A common example of a prerequisite is creating a secret or a set of secrets to the Kubernetes cluster before a chart is installed. for the purpose of mounting to a Kubernetes deployment. Users can be made aware of this requirement by referencing the README file.
  • Values: Charts often consist of many different values, each of which should be described in a table...