title: Can docker "instance" run totally in ram?
body: <p>I would like to power a docker instance in ram... totally inside ram... using tmpfs</p>
  
  <p>Can it be done?</p>
  
  <p>I'm not sure how docker uses filesystems as I'm too used to using kvm and xen, they both need to set up a default size before it can be used.</p>
  
  <p>So how does "docker fs" work?</p>