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

Configuring your cluster for impersonation

Let's deploy an impersonating proxy for our cluster. Assuming you're reusing your existing cluster, we first need to delete our orchestra Helm deployment (this will not delete the operator; we want to keep the OpenUnison operator). So, let's begin:

  1. Run the following command to delete our orchestra Helm deployment:
    $ helm delete orchestra --namespace openunison
    release "orchestra" uninstalled

    The only pod running in the openunison namespace is our operator. Notice that all the Secrets, Ingress, Deployments, Services, and other objects that were created by the operator when the orchestra Helm chart was deployed are all gone.

  2. Next, redeploy OpenUnison, but this time, update our Helm chart to use impersonation. Edit the values.yaml file and add the two bold lines shown in the following example file:
      openunison_host: ""