Comment # 5 on bug 1231244 from Franck Bui

(In reply to David Cassany from comment #4)
> We have no clue on which is the expected process that should have created
> them at boot. So far we have not identified anything on the boot process
> doing such a task, is there any special package or mechanism to automate
> system users creation at boot?

This is normally achieved by systemd-sysusers.service provided by systemd
package. This unit is run during the boot process but only when /etc needs to
be updated [1], which should be the case during the first boot.

I can have a look if you provide me a reproducer that describes how to create
and boot your image.


[1] /etc needs to be updated when the timestamp of /usr is newer than the one
for /etc/.updated.