Installing Grafana inside lxc container under Arch

I’ve installed an Arch lxc-container on top of an Arch Linux OS.

This container has an static IP 172.17.0.7/16. Network as well as resolving are working.

When logged into the container I did

# pacman -S grafana
# systemctl start grafana.service
# journalctl -u grafana.service

Aug 06 15:39:57 monitor systemd[1]: grafana.service: Failed to reset devices.list: Operation not permitted
Aug 06 15:39:57 monitor systemd[1]: Started Grafana service.
Aug 06 15:39:57 monitor systemd[1407]: grafana.service: Failed to determine user credentials: No such process
Aug 06 15:39:57 monitor systemd[1407]: grafana.service: Failed at step USER spawning /usr/bin/grafana-server: No such process
Aug 06 15:39:57 monitor systemd[1]: grafana.service: Main process exited, code=exited, status=217/USER
Aug 06 15:39:57 monitor systemd[1]: grafana.service: Failed with result 'exit-code'.

What did I missed? The first line of the log looks like a warning, not like an error. But what is

grafana.service: Failed to determine user credentials: No such process
grafana.service: Failed at step USER spawning /usr/bin/grafana-server: No such process

about?