Book Image

Kubernetes Cookbook - Second Edition

By : Hideto Saito, Hui-Chuan Chloe Lee, Ke-Jou Carol Hsu
Book Image

Kubernetes Cookbook - Second Edition

By: Hideto Saito, Hui-Chuan Chloe Lee, Ke-Jou Carol Hsu

Overview of this book

Kubernetes is an open source orchestration platform to manage containers in a cluster environment. With Kubernetes, you can configure and deploy containerized applications easily. This book gives you a quick brush up on how Kubernetes works with containers, and an overview of main Kubernetes concepts, such as Pods, Deployments, Services and etc. This book explains how to create Kubernetes clusters and run applications with proper authentication and authorization configurations. With real-world recipes, you'll learn how to create high availability Kubernetes clusters on AWS, GCP and in on-premise datacenters with proper logging and monitoring setup. You'll also learn some useful tips about how to build a continuous delivery pipeline for your application. Upon completion of this book, you will be able to use Kubernetes in production and will have a better understanding of how to manage containers using Kubernetes.
Table of Contents (11 chapters)

Working with Kubernetes DNS

When you deploy many pods to a Kubernetes cluster, service discovery is one of the most important functions, because pods may depend on other pods but the IP address of a pod will be changed when it restarts. You need to have a flexible way to communicate a pod's IP address to other pods. Kubernetes has an add-on feature called kube-dns that helps in this scenario. It can register and look up an IP address for pods and Kubernetes Services.

In this section, we will explore how to use kube-dns, which gives you a flexible way to configure DNS in your Kubernetes cluster.

Getting ready

Since Kubernetes version 1.3, kube-dns has come with Kubernetes and is enabled by default. To check whether kube...