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)
Part 1: Introduction and Setup
Part 2: Helm Chart Development
Part 3: Advanced Deployment Patterns

Updating the guestbook Helm chart

Similar to how we searched Artifact Hub to locate a WordPress chart in Chapter 3, Installing Your First App with Helm, we need to search for a Redis chart so that it can be used as a dependency. Let’s search for a Redis chart:

  1. Execute the following command to search for Redis charts from Artifact Hub:
    $ helm search hub redis
  2. The first chart that’s displayed is Bitnami’s Redis chart. We’ll use this chart as our dependency. If you didn’t add the bitnami chart repository in Chapter 3, Installing Your First App with Helm, add this chart repository now by using the helm repo add command:
    $ helm repo add bitnami
  3. Next, determine the Redis chart version you would like to use. A list of version numbers can be found by running the following command:
    $ helm search repo redis --versions

You will see an output similar to the following...