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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Chapter 5: Building Your First Helm Chart

Here are some answers to the questions presented in this chapter:

  1. The helm create command can be used to scaffold a new Helm chart.
  2. Declaring the Redis dependency prevented you from needing to create Redis templates in your Helm chart. It allowed you to deploy Redis without needing to know the proper Kubernetes resource configuration required.
  3. The annotation can be used to set the execution order. Hooks are executed in ascending order by weight.
  4. The fail function is used to immediately fail rendering and can be used to restrict user input against a set of valid settings. The required function is used to declare a required value, in which chart templating will fail if that value is not provided.
  5. To publish a Helm chart to a GitHub Pages chart repository, you must first use the helm package command to package your Helm chart in TGZ format. Next, you should generate the repository’s index.yaml...