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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What this book covers

Chapter 1, Understanding Kubernetes and Helm, provides an introduction to Kubernetes and Helm. You will be introduced to the challenges that users face when deploying applications to Kubernetes and how Helm can help simplify deployments and increase productivity.

Chapter 2, Preparing a Kubernetes and Helm Environment, covers the tools required to deploy applications with Helm on a local Kubernetes cluster. In addition, you will also learn about basic Helm configurations that occur post-installation.

Chapter 3, Installing Your First Helm Chart, explains how to deploy an application to Kubernetes by installing a Helm chart and covers the different life cycle phases of an application deployed with Helm.

Chapter 4, Understanding Helm Charts, dives deep into the building blocks of a Helm chart and prepares you with the knowledge required to build your own Helm chart.

Chapter 5, Building Your First Helm Chart, provides an end-to-end walkthrough of building a Helm chart. The chapter begins with the fundamental concepts of building a Helm chart that leverages basic Helm constructs and progresses to modifying the baseline configurations to incorporate more advanced Helm constructs. Finally, you will learn how to deploy a chart to a basic chart repository

Chapter 6, Testing Helm Charts, discusses different methodologies around linting and testing Helm charts.

Chapter 7, Automating Helm Processes Using CI/CD and GitOps, explores an advanced use case in terms of leveraging CI/CD and GitOps models to automate Helm tasks. Namely, developing a process around testing, packaging, and releasing Helm charts. In addition, the management of Helm chart installations across multiple different environments is also introduced.

Chapter 8, Using Helm with the Operator Framework, discusses the fundamental concepts of operators on Kubernetes with a view to building a Helm operator out of an existing Helm chart using the operator-sdk tool provided by the operator framework.

Chapter 9, Helm Security Considerations, dives into some of the security considerations and precautions around using Helm, from the moment the tool is installed to the second it is used to install a Helm chart on a Kubernetes cluster.