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

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...