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

Preparing our cluster

Before we begin deploying our technology stack, we need to do a couple of things. I recommend starting with a fresh cluster. If you're using the KinD cluster from this book, start with a new cluster. We're deploying several components that need to be integrated and it will be simpler and easier to start fresh rather than potential struggling with previous configurations. Before we start deploying the applications that will make up our stack, we're going to deploy JetStack's cert-manager to automate certificate issuing, a simple container registry, and OpenUnison for authentication and automation.

Deploying cert-manager

JetStack, a Kubernetes-focused consulting company, created a project called cert-manager to make it easier to automate the creation and renewal of certificates. This project works by letting you define issuers using Kubernetes custom resources and then using annotations on Ingress objects to generate certificates using...