Overview

Modern DNS on Linux: Power DevOps, Cloud, and On-Prem Systems with Reliable Name Services When DNS breaks, everything looks broken. Applications stall, clusters appear offline, deployments fail, and teams scramble in the dark. Yet DNS is often treated as ""set it once and forget it"" infrastructure, until it becomes the single point of failure no one fully understands. This book fixes that. Modern DNS on Linux shows you how DNS actually works in today's environments and how to run it with confidence. It goes beyond legacy zone-file thinking and tackles DNS as a living system that spans Linux servers, cloud platforms, Kubernetes clusters, hybrid networks, and automated pipelines. The focus is operational clarity. You learn how resolution really flows, how caching and TTLs behave under load, how modern resolvers and authoritative servers interact, and how to keep name services reliable as systems scale and change. Instead of abstract theory, the book delivers practical, production-tested patterns. You'll work with authoritative DNS using tools like BIND, PowerDNS, and Knot. You'll configure recursive resolvers such as Unbound and systemd-resolved. You'll see how DNS behaves inside containers, across cloud providers, and between on-prem and cloud networks. Security, observability, automation, and troubleshooting are treated as first-class concerns, not afterthoughts. By the end of this book, you will be able to: Design and operate reliable DNS on Linux for cloud, on-prem, and hybrid environments Configure authoritative and recursive DNS servers with clear ownership and safe defaults Secure DNS with DNSSEC, access controls, rate limiting, and logging Integrate DNS into DevOps workflows, CI/CD pipelines, and infrastructure as code Monitor DNS health, performance, and SLAs with real operational signals Troubleshoot DNS failures methodically using proven workflows instead of guesswork This book is written for system administrators, network engineers, and DevOps engineers who need DNS to be predictable, secure, and boring in production. All examples and configurations are self-contained within the book, with no external repository dependency. If DNS has ever slowed your incidents, blocked a release, or made an outage harder than it needed to be, this book is your next essential read. Get Modern DNS on Linux and take control of one of the most critical systems in your infrastructure.

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