Book Image

Kubernetes – An Enterprise Guide - Second Edition

By : Marc Boorshtein, Scott Surovich
Book Image

Kubernetes – An Enterprise Guide - Second Edition

By: Marc Boorshtein, Scott Surovich

Overview of this book

Kubernetes has taken the world by storm, becoming the standard infrastructure for DevOps teams to develop, test, and run applications. With significant updates in each chapter, this revised edition will help you acquire the knowledge and tools required to integrate Kubernetes clusters in an enterprise environment. The book introduces you to Docker and Kubernetes fundamentals, including a review of basic Kubernetes objects. You’ll get to grips with containerization and understand its core functionalities such as creating ephemeral multinode clusters using KinD. The book has replaced PodSecurityPolicies (PSP) with OPA/Gatekeeper for PSP-like enforcement. You’ll integrate your container into a cloud platform and tools including MetalLB, externalDNS, OpenID connect (OIDC), Open Policy Agent (OPA), Falco, and Velero. After learning to deploy your core cluster, you’ll learn how to deploy Istio and how to deploy both monolithic applications and microservices into your service mesh. Finally, you will discover how to deploy an entire GitOps platform to Kubernetes using continuous integration and continuous delivery (CI/CD).
Table of Contents (17 chapters)
15
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16
Index

Comparing microservices and monoliths

Before we dive too deeply into code, we should spend some time discussing the differences between microservices and monolithic architecture. The microservices versus monolithic architecture debate is as old as computing itself (and the theory is probably even older). Understanding how these two approaches relate to each other and your problem set will help you decide which one to use.

My history with microservices versus monolithic architecture

Before we get into the microservices versus monoliths discussion, I wanted to share my own history with this conversation. I doubt it's unique, but it does frame my outlook on the discussion and adds some context to the recommendations in this chapter.

My introduction to this discussion was when I was a computer science student in college and had started using Linux and open source. One of my favorite books, Open Sources: Voices from the Open Source Revolution, had an appendix on the debate...