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)
Section 1: Introduction and Setup
Section 2: Helm Chart Development
Section 3: Adanced Deployment Patterns
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Setting up Kubectl

As mentioned in Chapter 1, Understanding Kubernetes and Helm, Kubernetes is a system that exposes different API endpoints. These API endpoints are used to perform various actions on a cluster, such as creating, viewing, or deleting resources. To provide simpler user experience, developers need a way of interacting with Kubernetes without having to manage the underlying API layer.

While you will predominantly use the Helm command-line tool throughout the course of this book to install and manage applications, kubectl is an essential tool for common tasks.

Read on to learn how to install kubectl on a local workstation. Note that the kubectl version used at the time of writing is v1.16.2.

Installing Kubectl

Kubectl can be installed using Minikube or it can be obtained via a package manager or through direct download. We will first describe how to obtain kubectl using Minikube.

Installing Kubectl via Minikube

The installation of kubectl is straightforward...