Learning CoreDNS

Configuring DNS for Cloud Native Environments

By: John Belamaric, Cricket Liu

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eText | 30 August 2019 | Edition Number 1

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Until recently, learning CoreDNS required reading the code or combing through the skimpy documentation on the website. No longer. With this practical book, developers and operators working with Docker or Linux containers will learn how to use this standard DNS server with Kubernetes.

John Belamaric, senior staff software engineer at Google, and Cricket Liu, chief DNS architect at Infoblox, show you how to configure CoreDNS using real-world configuration examples to achieve specific purposes. You'll learn the basics of DNS, including how it functions as a location broker in container environments and how it ties into Kubernetes.

Dive into DNS theory: the DNS namespace, domain names, domains, and zones
Learn how to configure your CoreDNS server
Manage and serve basic and advanced zone data with CoreDNS
Configure CoreDNS service discovery with etcd and Kubernetes
Learn one of the most common use cases for CoreDNS: the integration with Kubernetes
Manipulate queries and responses as they flow through the plug-in chain
Monitor and troubleshoot the availability and performance of your DNS service
Build custom versions of CoreDNS and write your own plug-ins