The documentation left out the ./ and it needs the --ping to be specified
docker exec 48d286711eae ./traefik healthcheck --ping
time="2019-09-05T11:13:31Z" level=info msg="Configuration loaded from flags."
OK: http://:8080/ping
also healthcheck ignores any attempts to disable logging, so --log=false or --log.level=ERROR still displays the message
So the final solution you would think at the moment is the following in the docker-compose.yml file.
healthcheck:
test: ./traefik healtcheck --ping
However, when adding that, it terminates traefik.
