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


In this chapter, you learned about two important objects in Kubernetes that expose your deployments to other cluster resources and users.

We started the chapter by going over services and the multiple types that can be assigned. The three major service types are ClusterIP, NodePort, and LoadBalancer. Selecting the type of service will configure how your application is accessed.

Typically, services alone are not the only objects that are used to provide access to applications running in the cluster. You will often use a ClusterIP service along with an Ingress controller to provide access to services that use layer 7. Some applications may require additional communication, that is not provided by a layer-7 load balancer. These applications may need a layer-4 load balancer to expose their services to the users. In the load balancing section, we demonstrated the installation and use of MetalLB, a commonly used open source layer-7 load balancer.

In the last section, we...