I tried to pull a big docker image, but it failed cause of disk space. However, some download and extracting had already been proceed (like few gigabytes), so I was wondering where those data goes.

Any Ideas?

Futhermore, is it possible to restart the pull where it failed or I have to restart from the beginning?

>Solution :

storage for docker images are normally in a directory like /var/lib/docker/overlay2/. It will depend on your version, your storage driver, your distro, etc.

You can find the correct values on your system with docker image inspect, and then looking for GraphDriver.Data properties.

Since images are broken up into layers, you absolutely can pick up where you left off, after a failed docker pull.

You may also wish to look into docker system prune