Just the way I have to start the container, I don't feel comfortable doing this:
docker run \
Collectd has lots of plugins ( a docker one also ) and found it easy to install and setup once the container is running or from a Dockerfile, but hey, not saying metricbeat is bad , I used it for other things and it's great, the dashboards are cool, i'ts just the way I wanted to monitor a container and want to do it as simple as possible..
I'd like to hear more about the docker module you mention before anyway, and when I upgrade ES to 5.x I'll want to test x-pack which looks awesome.
Thank for your time and support