Previously we required network-online.target for multi-user.target. This
has made a lot of people very angry and has been widely regarded as a
bad move (or at least, very nonstandard):
15d761a525 (commitcomment-128564097)
This was done because of fragile tests and services declaring
dependencies on multi-user.target when they meant network-online.target.
Let's rip off the bandaid and fix our tests.
This is introduced and enabled by default because the config syntax for
the exporter changed with release 0.23.0.
This should make the breaking config change obvious before services are
deployed with an incompatible old config.
The check is based on the check present in the blackbox-exporter module.
Closes#169733
The issue is that Nextcloud fails to start up after a GC because the
symlink from `override.config.php` is stale.
I'm relatively certain that this is not a bug in the Nix GC - that
would've popped up somewhere else already in the past years - and one of
the reporters seems to confirm that: when they restarted
`nextcloud-setup.service` after the issue appeared, an
`override.config.php` pointing to a different hash was there.
This hints that on a deploy `nextcloud-setup` wasn't restarted properly
and thus replacing the symlink update was missed. This is relatively
hard to trigger due to the nature of the bug unfortunately (you usually
keep system generations for a few weeks and you'll need to change the
configuration - or stdenv - to get a different `override.config.php`),
so getting pointers from folks who are affected is rather complicated.
So I decided to work around this by using systemd-tmpfiles which a lot
of other modules already utilize for this use-case. Now,
`override.config.php` and the directory structure aren't created by
`nextcloud-setup`, but by `systemd-tmpfiles`.
With that, the structure is guaranteed to exist
* on boot, since tmpfiles are always created/applied then
* on config activation, since this is done before services are
(re)started which covers the case for new installations and existing
ones.
Also, the recursive `chgrp` was used as transition tool when we switched
from `nginx` as owning group to a dedicated `nextcloud` group[1][2], but
this was several releases ago, so I don't consider this relevant
anymore.
[1] fd9eb16b24
[2] ca916e8cb3
