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

Reviewing your KinD cluster

With a Kubernetes cluster now available, we have the ability to look at Kubernetes objects first-hand. This will help you understand the previous chapter, where we covered many of the base objects included in a Kubernetes cluster. In particular, we will discuss the storage objects that are included with your KinD cluster.

KinD storage objects

Remember that KinD includes Rancher's auto-provisioner to provide automated persistent disk management for the cluster. In Chapter 5, Kubernetes Bootcamp, we went over the storage-related objects, and now that we have a cluster with a storage system configured, we can explain them in greater detail.

There is one object that the auto-provisioner does not require since it uses a base Kubernetes feature: it does not require a CSIdriver. Since the ability to use local host paths as PVCs is part of Kubernetes, we will not see any CSIdriver objects in our KinD cluster.

The first objects in our KinD cluster...