Book Image

Learn Helm

By : Andrew Block, Austin Dewey
Book Image

Learn Helm

By: Andrew Block, Austin Dewey

Overview of this book

Containerization is currently known to be one of the best ways to implement DevOps. While Docker introduced containers and changed the DevOps era, Google developed an extensive container orchestration system, Kubernetes, which is now considered the frontrunner in container orchestration. With the help of this book, you’ll explore the efficiency of managing applications running on Kubernetes using Helm. Starting with a short introduction to Helm and how it can benefit the entire container environment, you’ll then delve into the architectural aspects, in addition to learning about Helm charts and its use cases. You’ll understand how to write Helm charts in order to automate application deployment on Kubernetes. Focused on providing enterprise-ready patterns relating to Helm and automation, the book covers best practices for application development, delivery, and lifecycle management with Helm. By the end of this Kubernetes book, you will have learned how to leverage Helm to develop an enterprise pattern for application delivery.
Table of Contents (15 chapters)
1
Section 1: Introduction and Setup
5
Section 2: Helm Chart Development
9
Section 3: Adanced Deployment Patterns
14
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Understanding the WordPress application

In this chapter, you will use Helm to deploy WordPress on Kubernetes. WordPress is an open source Content Management System (CMS) used to create websites and blogs. Two different variants are available—WordPress.com and WordPress.org. WordPress.com is a Software-As-A-Service (SaaS) version of the CMS, meaning the WordPress application and its components are already hosted and managed by WordPress. In this case, users do not need to worry about installing their own WordPress instance as they can simply access instances that are already available. WordPress.org, on the other hand, is the self-hosted option. It requires users to deploy their own WordPress instances and requires expertise to maintain.

Since WordPress.com is easier to start with, it may sound like the more desirable option. This SaaS version of WordPress, however, has many disadvantages over the self-hosted WordPress.org: