The problem with Docker is their man page is wank!

$ docker service
gives you a list of commands; "Ooh! yes, ps [list all services] is what I want."

$ docker service ps

Gives you this shit.

"docker service ps" requires at least 1 argument.

See 'docker service ps --help'.

Usage: docker service ps [OPTIONS] SERVICE [SERVICE...]

I just want to know WTF the busted swarm is doing FFS!