Moving files into a Docker Data Volume

Question

First I create a volume:

docker volume create --name some-volume

Then I create a file touch ~/somefile.txt

Now I want to move ~/somefile.txt into the root of the volume some-volume. How do I do this?

Answer 1

You can do this with a container:

docker run --rm -v `pwd`:/source -v some-volume:/target \
  busybox cp -av /source/somefile.txt /target/somefile.txt

I will also use tar and stdin to pipe files into a remote volume over the docker client/server connection:

tar -cv -C source-dir . | \
  docker run --rm -i -v some-volume:/target busybox tar -xC /target

An export is similar:

docker run --rm -v some-volume:/source busybox tar -cC /source . | \
  tar -xC target-dir