device-mapper

I can see that Docker takes 12GB of my filesystem: 2.7G /var/lib/docker/vfs/dir 2.7G /var/lib/docker/vfs 2.8G /var/lib/docker/devicemapper/mnt 6.3G /var/lib/docker/devicemapper/devicemapper 9.1G /var/lib/docker/devicemapper 12G /var/lib/docker But, how do I know how this is distributed over the containers? I tried to attach to the containers by running (the new v1.3 command) docker exec -it <container_name> bash and then running 'df -h' to analyze the disk usage. It seems to be working, but not with containers that use 'volumes-from'. For example, I use a data-only container for MongoDB,

I have a docker environment with 2 containers (Jenkins and Nexus, both with their own named volume). I have a daily cron-job which deletes unused containers and images. This is working fine. But the problem is inside my devicemapper: du -sh /var/lib/docker/ 30G docker/ I can each folder in my docker folder: Volumes (big, but that's normal in my case): /var/lib/docker# du -sh volumes/ 14G volumes/ Containers: /var/lib/docker# du -sh containers/ 3.2M containers/ Images: /var/lib/docker# du -sh image/ 5.8M image/ Devicemapper: /var/lib/docker# du -sh devicemapper/ 16G devicemapper/ /var/lib