[Bug 1982553] Re: Search domains not working after upgrading to Ubuntu 22.04

[Lukas Märdian]

This might actually be an issue/change in systemd-resolved between Focal
and Jammy.

On Focal the search domain is appended even to FQDNs.
On Jammy the search domain is only appended to single-label hostnames (hostnames containing no dots), to make them FQDNs.

Would you mind sharing your output of `resolvectl` (from Focal & Jammy)?

It needs more investigation.

** Also affects: systemd (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  Search domains not working after upgrading to Ubuntu 22.04

Status in netplan.io package in Ubuntu:
  Incomplete
Status in systemd package in Ubuntu:
  New

Bug description:
  Hello,

  After upgrading to Ubuntu 22.04, I noticed that search domains are not
  working anymore.

  Either I configure search domains via netplan or with graphical "nm-
  connection-editor", this is not taken into account when resolving
  domain names.

  For instance if I configure "domain.com" in search domains list,
  looking for "host" does not look for "host.domain.com". This is
  confirmed with a wireshark capture. Consequently if I want to connect
  with SSH to host.domain.com, I have to type the entire url.

  In Ubuntu 20.04 this works correctly. With a packet capture I can see
  one domain lookup for each of my search domains configured.

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