Ubuntu 24 chicken-egg problem: sshd config can not be validated due to missing /run/sshd

[timdeluxe]

We are looking for Ubuntu 24 installations and experience a problem:
On a fresh install, the openssh-server is not started yet. Therefore the "/run/sshd" directory is missing, which is required for the validation of the config:

err | Puppet | Execution of '/usr/sbin/sshd -tf /etc/ssh/sshd_config20241106-2171-1prqvcn' returned 255: Missing privilege separation directory: /run/sshd
err | /Stage[main]/Ssh::Server::Config/Concat[/etc/ssh/sshd_config]/File[/etc/ssh/sshd_config]/content | change from '{sha256}9ce65293b15513398541fad559786ef310a9045bdda398005477fda6ebf3c0f0' to '{sha256}8e740c5c770cf9c254e52e80004d078f329b8411fc4aff04ad723a5d92638c31' failed: Execution of '/usr/sbin/sshd -tf /etc/ssh/sshd_config20241106-2171-1prqvcn' returned 255: Missing privilege separation directory: /run/sshd
warning | /Stage[main]/Ssh::Server::Service/Service[ssh] | Skipping because of failed dependencies

(Output taken from Foreman, which explains why it looks a bit different as usual)

The service comes later in the dependency try of this module, thats why it never will succeed without manual interaction.

I have no good idea how to fix this, an idea could be to add a mkdir /run/sshd && at the beginning of the validate-command?