SHshriphani·Sep 2, 2022
The bit about turning a dockerfile into a rootfs. A docker image is just a tarball of tarballs. We do something like this:
- you can dump the image using `docker save <name>`.
- you can then get a list of the tarballs in this image by extracting this tarball and reading the file `manifest.json`; `Config` -> `Layers` will give you a list of tarballs (see undocker for how to do this: https://github.com/larsks/undocker)
- Untar these in a directory and use linux tools to convert this dir to a rootfs.
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