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

Updating and deploying the Guestbook chart

In order to successfully deploy our Guestbook application, we need to add values to configure the following details:

  • Configure the Redis service names and disable Redis authentication
  • Create environment variables for defining the names of the Redis leader and follower

We will begin by first handling Redis values.

Updating Redis values

In Chapter 5, Helm Dependency Management, we created a Redis dependency for creating a backend. Now, we will add a couple of values to our values.yaml file to complete the configuration.

The values that we need to add are in the Git repository at https://github.com/PacktPublishing/Managing-Kubernetes-Resources-using-Helm/blob/main/chapter6/guestbook/values.yaml#L5-L8 and are shown in the following snippet:

redis:
  fullnameOverride: redis
  auth:
    enabled: false

The redis.fullnameOverride value is used to ensure that deployed Redis instances...