title: Prometheus - how to monitor other docker containers
body: <p>I want to use <strong>Prometheus</strong> to monitor my <strong>docker</strong> containers. I can run <strong>Prometheus</strong> with <strong>Grafana</strong> but I do not know how to instruct it to monitor other docker containers.
  If possible I would like to see some example. For instance I have <strong>Ubuntu</strong> container running on my host as well as <strong>Gentoo</strong> container. How can I tell Prometheus to monitor them, or perhaps to monitor some application(s) running inside?
  Thanks in advance for your time and patience with me.</p>