Book Image

Managing Kubernetes Resources Using Helm - Second Edition

By : Andrew Block, Austin Dewey
Book Image

Managing Kubernetes Resources Using Helm - Second Edition

By: Andrew Block, Austin Dewey

Overview of this book

Containerization is one of the best ways to implement DevOps, and learning how to execute it effectively is an essential part of a developer’s skillset. Kubernetes is the current industry standard for container orchestration. This book will help you discover the efficiency of managing applications running on Kubernetes with Helm. Starting with a brief introduction to Helm and its impact on users working with containers and Kubernetes, you’ll delve into the primitives of Helm charts and their architecture and use cases. From there, you’ll understand how to write Helm charts in order to automate application deployment on Kubernetes and work your way toward more advanced strategies. These enterprise-ready patterns are focused on concepts beyond the basics so that you can use Helm optimally, looking at topics related to automation, application development, delivery, lifecycle management, and security. By the end of this book, you’ll have learned how to leverage Helm to build, deploy, and manage applications on Kubernetes.
Table of Contents (18 chapters)
1
Part 1: Introduction and Setup
5
Part 2: Helm Chart Development
12
Part 3: Advanced Deployment Patterns

Deploying an application from a remote Helm chart repository

When installing Helm charts, users often interact with remote repositories. Similarly, we can use Argo CD to deploy an application from a specified Helm chart repository.

The following diagram shows the flow involved in deploying an application from a remote Helm chart repository with Argo CD:

Figure 10.4 – Deploying an application from a remote Helm chart repository

First, Argo CD downloads the Helm chart configured in the Application resource. Then, it renders the Helm chart and applies the manifests to the destination cluster and namespace.

We have provided an example Application resource in the Packt repository at chapter10/remote-registry/application.yaml (https://github.com/PacktPublishing/Managing-Kubernetes-Resources-using-Helm/blob/main/chapter10/remote-registry/application.yaml). The resource is configured similarly to Application from the previous section, but we can observe...