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systemd-resolved の構成を図示してみる

Last updated at Posted at 2021-09-18

概要

文章のみでは systemd-resolved が理解できなかったので図示してみた.

外部(WEB)に問合せに行くまでの経路

社内を想定しており、大別すると次の 2つである.

緑線 ... リゾルバ (systemd-resolved の機能) を使う経路 (Ubuntu デフォルト)

赤線 ... 内部 DNSサーバ (例: 開発チーム内限定) を使う経路

image.png

詳細

リゾルバ (systemd-resolved の機能) を使う経路 (Ubuntu デフォルト)

・/etc/resolv.conf の実体が /run/systemd/resolve/stub-resolv.conf になっている.

image.png

内部 DNSサーバ (例: 開発チーム内限定) を使う経路

・/etc/resolv.conf の実体が /run/systemd/resolve/resolv.conf になっている.

image.png

 

参考にした情報

https://qiita.com/shora_kujira16/items/31d09b373809a5a44ae5

https://man.archlinux.org/man/systemd-resolved.8

以上.

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