I'm not sure anyone has a way or requesting this but this is my use case.

I knew that there's a way to backup data container with --volumes-from, bind mount with host with tar as describe here. But it should be good if Docker have a way to commit data container to image with data in Volumes. So I can use it for snapshot/backup data and push/pull it to transfer data across server.

Use case example

Dockerfile

VOLUME /home/web/app/uploads

On host

docker run -d app
docker run -d --volumes-from app app-data
docker commit --with-volumes=true app-data app-backup:201407131628
docker push app-backup #this will push only diff

On dev or another host

docker pull app-backup:201407131628
docker run --with-volumes=true -d app-data
docker run -d --volumes-from app-data app

Do you have a plan for this feature or any work around to do snapshot on volume?
I know this will be very complicated but it will be the very nice to have feature for sure :)