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
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Creating a CD pipeline to deploy applications with Helm

A CD pipeline is a set of repeatable steps that can deploy to one or more different environments in an automated fashion. In this section, we will create a CD pipeline to deploy the nginx chart that we tested and pushed to our GitHub Pages repository in the previous section. GitOps will also be leveraged by referencing the values files saved to a git repository.

Let's design the high-level steps that need to be included in this pipeline.

Designing the pipeline

In previous chapters, deploying to a Kubernetes environment with Helm was a manual process. This CD pipeline, however, is designed to deploy to multiple different environments while abstracting the use of Helm.

The following steps describe the CD workflow that we will cover in this section:

  1. Add the stable GitHub Pages repository containing the nginx chart release.
  2. Deploy the nginx chart to the development environment.
  3. Deploy the nginx chart...