How deeply does Kubernetes in Action, Second Edition cover DNS server?

Explains same- and cross-namespace names, DNS suffixes, and pod resolver configuration, but does not detail DNS server internals.

DNS server

As explained in Kubernetes in Action, Second Edition

A DNS server resolves domain names into network addresses and other DNS records.

A DNS server translates service names into network addresses. In Kubernetes, pods typically use an internal DNS server so applications can reach Services by name instead of hard-coding cluster IP addresses. section 11.1.3

Kubernetes DNS name resolution supports several practical forms:

Use the Service name, such as http://quiz, when the Service is in the same namespace. section 11.1.3
Append the namespace for cross-namespace access, such as http://quiz.kiada. section 11.1.3
Use longer names such as quiz.kiada.svc or quiz.kiada.svc.cluster.local; cluster.local is the default suffix but can be changed. section 11.1.3

Calling Services by name

A pod can configure an application with QUOTE_URL=http://quote/quote and QUIZ_URL=http://quiz. The application then connects through Kubernetes Services while DNS resolves those names to Service cluster IP addresses. section 11.1.3

How Kubernetes in Action, Second Edition covers it

Cover of Kubernetes in Action, Second Edition

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Also explained in

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Acing the CCNA Exam: Volume 2 Advanced Networking and SecurityA DNS server is a service that answers domain-name queries by returning corresponding network records or consulting other DNS servers.

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Related concepts

ip dns serverconfigured by · ip dns server is a Cisco IOS global configuration command that configures the device to answer DNS queries.
root dns serveruses · A root DNS server is a server at the top of the DNS hierarchy that directs queries to authoritative servers for top-level domains.
recursive dns queryused by · A recursive DNS query requests that a DNS server return a definite answer or an error for the client rather than referring the client elsewhere.
dns queryused by · A DNS query is a request sent to the Domain Name System to obtain information about a domain name or other DNS record.

This explainer was generated by Manning's knowledge graph from the text of Kubernetes in Action, Second Edition. The section links point to the parts of the book it draws on.