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   Lennart Poettering (pid_eins@mastodon.social)'s status on Thursday, 12-Jun-2025 04:05:23 JST Lennart Poettering

   1️⃣3️⃣ Here's the 13th post highlighting key new features of the upcoming v258 release of systemd. #systemd258

   One of systemd-resolved's fundamental jobs is to maintain per-interface and global DNS configuration (as well as per-delegate configuration, as described earlier in this series). We always provided D-Bus APIs to query the current state of this, and "resolvectl" to a large degree is just a wrapper around that.

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     Lennart Poettering (pid_eins@mastodon.social)'s status on Thursday, 12-Jun-2025 04:05:23 JST Lennart Poettering

     in reply to

     In v258 we updated this area substantially. There's now a Varlink IPC call to subscribe to all DNS configuration changes (io.systemd.Resolve.Monitor.SubscribeDNSConfiguration() on /run/systemd/resolve/io.systemd.Resolve.Monitor).

     If you issue this you'll get a stream of updates of the DNS configuration as they happen.

     Why is this useful? This is used by systemd-networkd-wait-online's new --dns switch. If specified it will not only wait until a suitable network interface with…

     James Morris likes this.