Long time listener, first time caller.
I've inherited a CI box running docker and I'm looking to clear some space. Running docker info tells me that the current storage driver is overlay. Despite that, I can see /var/lib/docker/devicemapper still exists and its eating up 10G of space.
With that in mind, is it safe to delete this folder? How can I tell if there are any references to this?
Thanks for your help!
Nick