docker /var/lib/docker/overlay2 disk full

My docker overlay consume more space , no disk space, I have extended my Aws EBS two times, but no luck. Again disk full.

Currently 7 containers are running on my server.

To see the running containers

# docker ps -a

While checking the associated images with dockers instance is

So here is docker instances with images size.

How to clean unwanted images, Just run the following command.

docker prune -a

It’ will delete the unwanted & unused images on docker,

docker ps -s will show the detailed usage of each & every containers.

FYI : Don’t remove any images or containers manually, it will leads to data loss.

/var/lib/docker/containers : containers location

/var/lib/docker/overlay : Image locations

Eg : Dockers image & it’s contents

contents under ./dacad40f6fd9eacc03e60c3550c645bf15a4809bdc9a5b695c06bbdc69dea0d5
drwxr-xr-x. 5 root root 4096 May 22 13:54 diff
-rw-r--r--. 1 root root 26 May 22 13:54 link
-rw-r--r--. 1 root root 724 May 22 13:54 lower
drwxr-xr-x. 1 root root 4096 May 22 13:54 merged
drwx------. 3 root root 4096 May 29 11:01 work

The images contains some directory like link, merged & diff,

The second-lowest layer, and each higher layer, contain a file called lower, which denotes its parent, and a directory called diff which contains its contents. It also contains a merged directory, which contains the unified contents of its parent layer and itself, and a work directory which is used internally by OverlayFS.

so Just run

docker prune -a

Any doubts ping me ….!! 🙂