Status

docker-extract

docker-extract is a rust library that extracts the filesystem from a docker image.

Here is an example to extract alpine:latest to directory ./docker-fs:

use docker_extract;
use std::path::Path;

fn main() {
    let image = "alpine";
    let tag = "latest";
    let to_dir = Path::new("./docker-fs");
    docker_extract::extract_image(image, tag, &to_dir);
}

Details

The following procedure describes what docker-extract does:

1. Run docker save {image}:{tag} -o {tmp_dir}/image.tar
2. Extract all layers from ${tmp_dir}/image.tar to wanted result dir
3. Delete ${tmp_dir}

It follows, that docker-extract needs access to docker and that {image}:{tag} is already pulled.