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

Adding a custom load balancer for Ingress


This section is a complex topic that covers adding a custom HAProxy container that you can use to load balance worker nodes in a KinD cluster. You should not deploy these steps on the KinD cluster that we will use for the remaining chapters.

We added this section for anybody that may want to know more about how to load balance between multiple worker nodes.

KinD does not include a load balancer for worker nodes. The included HAProxy container only creates a configuration file for the API server; the team does not officially support any modifications to the default image or configuration. Since you will interact with load balancers in your everyday work, we wanted to add a section on how to configure your own HAProxy container in order to load balance between three KinD nodes.

First, we will not use this configuration for any of chapters in this book. We want to make the exercises available to everyone, so to limit the required...