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

Installing Your First App with Helm

Earlier in this book, we referred to Helm as the Kubernetes package manager and compared it to an operating system’s package manager. A package manager allows users to quickly and easily install applications of varying complexities and manage any dependencies that an application might have. Helm works similarly.

Users simply determine the application they want to deploy on Kubernetes and Helm does the rest of the work. A Helm chart – a packaging of Kubernetes resources – contains the logic and components required to install an application, allowing users to perform installations without needing to know the specific resources required. Users can also pass in parameters, called values, to a Helm chart to customize different aspects of the application. You will explore these features in this chapter by leveraging Helm as a package manager to deploy an instance of WordPress onto Kubernetes.

In this chapter, we will cover...