I tried all three of these solutions today. They are all different in their own way.
Portainer was actually quite good. I loved the log viewing feature of containers and the fact you can start a console right on the web interface into the docker container.
Glances was quite simple, did the job, it's a more feature rich version of top/htop. I did like the fact it listed which networks (customer websites) were using the most bandwidth at that moment in time.
checkmk was a bit more complex (for me), but looks good too. The open source edition is built with Nagios at it's core.
I also tried the
docker stats command and use NetData by default.
Has anyone else got experience with any other docker/container/system monitoring tools?