[arch-general] Problems with shadow service

[Peter Nabbefeld]

Hello,

because of a performance problem I've checked services and noticed this 
line:
● shadow.service 
                    loaded failed failed    Verify integrity of password 
and group files


So I checked this service and got this output:

$ systemctl status shadow
● shadow.service - Verify integrity of password and group files
    Loaded: loaded (/usr/lib/systemd/system/shadow.service; static; 
vendor preset: disabled)
    Active: failed (Result: exit-code) since Wed 2018-12-12 06:59:27 
CET; 14h ago
   Process: 561 ExecStart=/bin/sh -c /usr/bin/pwck -r || r=1; 
/usr/bin/grpck -r && exit $r (code=exited, status=1/FAILURE)
  Main PID: 561 (code=exited, status=1/FAILURE)

Dez 12 06:59:24 tuchola systemd[1]: Started Verify integrity of password 
and group files.
Dez 12 06:59:26 tuchola sh[561]: Benutzer »ceph«: Verzeichnis 
»/run/ceph« existiert nicht.
Dez 12 06:59:26 tuchola sh[561]: pwck: Keine Änderungen
Dez 12 06:59:27 tuchola systemd[1]: shadow.service: Main process exited, 
code=exited, status=1/FAILURE
Dez 12 06:59:27 tuchola systemd[1]: shadow.service: Failed with result 
'exit-code'.


As system seems to run without problems (other than performance), I've 
got two questions:

1. Do I need the shadow service? Why?

2. Why does it fail? User "ceph" is defined, but /run/ceph does not 
exist as its home directory - why? Seems there's a problem in the 
installation of ceph-libs or any or its dependants (like libvirt). 
Probably the user is created only if whole ceph is installed, too?

Kind regards

Peter