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)
Section 1: Docker and Container Fundamentals
Section 2: Creating Kubernetes Development Clusters, Understanding objects, and Exposing Services
Section 3: Running Kubernetes in the Enterprise

Deploying Tekton

Tekton is the pipeline system we're using for our platform. Originally part of the Knative project for building function-as-a-service on Kubernetes, Tekton was broken out into its own project. The biggest difference between Tekton and other pipeline technologies you may have run is that Tekton is Kubernetes-native. Everything from its execution system, definition, and webhooks for automation are able to run on just about any Kubernetes distribution you can find. For example, we'll be running it in KinD and Red Hat has moved to Tekton as the main pipeline technology used for OpenShift starting in 4.1.

The process of deploying Tekton is pretty straightforward. Tekton is a series of operators that look for the creation of custom resources that define a build pipeline. The deployment itself only takes a couple of kubectl commands:

$ kubectl apply --filename \
$ kubectl...