Book Image

Kubernetes and Docker - An Enterprise Guide

By : Scott Surovich, Marc Boorshtein
Book Image

Kubernetes and Docker - An Enterprise Guide

By: Scott Surovich, Marc Boorshtein

Overview of this book

Containerization has changed the DevOps game completely, with Docker and Kubernetes playing important roles in altering the flow of app creation and deployment. This book will help you acquire the knowledge and tools required to integrate Kubernetes clusters in an enterprise environment. The book begins by introducing you to Docker and Kubernetes fundamentals, including a review of basic Kubernetes objects. You’ll then get to grips with containerization and understand its core functionalities, including how to create ephemeral multinode clusters using kind. As you make progress, you’ll learn about cluster architecture, Kubernetes cluster deployment, and cluster management, and get started with application deployment. Moving on, you’ll find out how to integrate your container to a cloud platform and integrate tools including MetalLB, externalDNS, OpenID connect (OIDC), pod security policies (PSPs), Open Policy Agent (OPA), Falco, and Velero. Finally, you will discover how to deploy an entire platform to the cloud using continuous integration and continuous delivery (CI/CD). By the end of this Kubernetes book, you will have learned how to create development clusters for testing applications and Kubernetes components, and be able to secure and audit a cluster by implementing various open-source solutions including OpenUnison, OPA, Falco, Kibana, and Velero.
Table of Contents (20 chapters)
1
Section 1: Docker and Container Fundamentals
5
Section 2: Creating Kubernetes Development Clusters, Understanding objects, and Exposing Services
9
Section 3: Running Kubernetes in the Enterprise

Installing KinD

The files for this chapter are located in the KinD directory. You can use the provided files, or you can create your own files from this chapter's content. We will explain each step of the installation process in this section.

Note

At the time of writing, the current version of KinD is .0.8.1. Version .0.8.0 introduced a new feature; that is, maintaining cluster state between reboot and Docker restarts.

Installing KinD – prerequisites

KinD requires a few prerequisites before you can create a cluster. In this section, we will detail each requirement and what how to install each component.

Installing Kubectl

Since KinD is a single executable, it does not install kubectl. If you do not have kubectl installed and you are using an Ubuntu 18.04 system, you can install it by running a snap install:

sudo snap install kubectl --classic

Installing Go

Before we can create a KinD cluster, you will need to install Go on your host. If you already...