What do you mean by container? That you run Ubuntu on Docker? Make sure the image has systemctl. Not all images have all tools from the desktop version.
But the question is, why do you need systemctl in docker?
Weird, I have an M1 and Dgraph works fine.
where this error comes from?
First I need to understand what is that. I know container only related to Docker, K8s and also some distros has its native support for “docker-like containers”. But when you say the word “container” along with “Ubuntu” and “Docker” in the same phrase, I think you are talking about something else.
You can use the standalone image Docker
and the Ratel image Docker