One of our hosts is being clogged by lots of docker junk. I'm cleaning dangling images and volumes regularly, but recently I've noticed it doesn't help that much, and the reason was a load of aufs
-related files. From a quick research I figured out it's the docker storage driver at current use, so I figured it's a lot of important cached files, but that just seems like A LOT of caching. We're running about 15 different images on the host.
So, I thought this might be eligible for some cleaning, but not sure I won't delete something important. So, is there a way to clean up the aufs
-related, unneeded files?
This is a screenshot of the disk stats (running on Ubuntu 16.04.1 LTS):