When `services.resolved` is enabled, then `resolve [!UNAVAIL=return]`
is added to `system.nssDatabases.hosts` with priority 501,
which prevents lower-priority NSS modules from running
unless systemd-resolved is not available.
Quoting from `man nss-resolve`:
> To activate the NSS module, add "resolve [!UNAVAIL=return]" to the line
> starting with "hosts:" in /etc/nsswitch.conf. Specifically, it is
> recommended to place "resolve" early in /etc/nsswitch.conf's "hosts:"
> line. It should be before the "files" entry, since systemd-resolved
> supports /etc/hosts internally, but with caching. To the contrary, it
> should be after "mymachines", to give hostnames given to local VMs and
> containers precedence over names received over DNS. Finally, we
> recommend placing "dns" somewhere after "resolve", to fall back to
> nss-dns if systemd-resolved.service is not available.
Note that the man page (just) recommends "early" and means with this
"before the 'files' and 'dns' entries". It does not insist on being
first or excluding other modules.
For this reason, libvirt NSS modules should run before the `resolve`
module. They should come right next to `mymachines` because both are
conceptually very similar -- they resolve local VMs/containers.
Since the data source of the libvirt NSS modules are local
plain text files (see source code of the libvirt NSS module),
no performance impact is expected form this raise of priorities.
Other NSS modules in NixOS also explicitly set their priority, which is
why this change increases consistency.
Fixes#322022
This allows us to set things like dependencies in a way that we can
catch typos at eval time.
So instead of
```nix
systemd.services.foo.wants = [ "bar.service" ];
```
we can write
```nix
systemd.services.foo.wants = [ config.systemd.services.bar.name ];
```
which will throw an error if no such service has been defined.
Not all cases can be done like this (eg template services), but in a lot
of cases this will allow to avoid typos.
There is a matching option on the unit option
(`systemd.units."foo.service".name`) as well.
There were several modules, critically including NetworkManager, which
were not prepared for this change. Most of the change was good,
however. Let's bring back the dependency and change the assertion to a
warning for now.
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.
The `AUTOFS4_FS` name appears to be a legacy naming stub:
>Ok, I ran the script, and also decided that we might as well remove
>the AUTOFS4 legacy naming stub entry by now.
>
>It has been five years, and people will have either picked up the new
>name with 'make oldconfig', or they just don't use 'make oldconfig' at
>all.
https://lore.kernel.org/lkml/CAHk-=wgK9-Tx4BxYMrc0pg==mcaz3cjWF6-CBwVpM_BZAmf4JQ@mail.gmail.com/#r
That has been remove in 6.6 kernel and results in a failure:
```
error:
Failed assertions:
- CONFIG_AUTOFS4_FS is not enabled!
```
Signed-off-by: Jakub Sokołowski <jakub@status.im>
This fixes notably the fact that /dev/zfs was not usable anymore as a user,
and potentially other things.
Tracked in systemd upstream under issue number 28653, 28765.
`systemd-growfs@.service` and `systemd-growfs-root.service` became real units since:
50072ccf1b
we need to add them to the nixos module so growfs works again
Or else systemd-oomd gets marked as failed due to
"Userspace Out-Of-Memory (OOM) Killer was skipped because of a failed condition check (ConditionControlGroupController=v2)."
and cause the system to enter degraded state.
Ref https://github.com/NixOS/nixpkgs/issues/195085
The ConditionFileNotEmpty override patch wasn't correct for stage1, which
does have the modules in /lib. So, remove the patch and set
the right path with overrides in the final system.
Also, make sure systemd-tmpfiles-setup-dev is pulled in to create
all the necessary symlinks.
Account for all `with*` options causing their respective unit files to
not be built, just like the current code `withCryptsetup` already does.
This fixes build errors like the following:
```
missing /nix/store/5fafsfms64fn3ywv274ky7arhm9yq2if-systemd-250.4/example/systemd/system/systemd-importd.service
error: builder for '/nix/store/67rdli5q5akzwmqgf8q0a1yp76jgr0px-system-units.drv' failed with exit code 1
```
Found by using a customised systemd package as follows:
```
systemd.package = pkgs.systemd-small;
nixpkgs.config.packageOverrides = pkgs: {
"systemd-small" = pkgs.systemd.override {
withImportd = false;
withMachined = false;
...
};
};
```
