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

Built-in objects

Built-in objects are essential building blocks that you can use to write your own Helm charts. As mentioned previously, they provide access to chart values by using the .Values object, but there are many more objects to explore that provide access to additional information and features.

The following table lists these built-in objects:

Object

Definition

.Values

Used to access values in the values.yaml file or values that were provided using the --values and --set flags

.Release

Used to access metadata about the Helm release, such as its name, namespace, and revision number

.Chart

Used to access metadata about the Helm chart, such as its name and version

.Template

Used to access metadata...