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@@ -41,22 +41,19 @@ GitHub Repo:
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- [Debian / Ubuntu](
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https://github.com/docker/docker/blob/master/contrib/mkimage-debootstrap.sh)
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-## Creating a simple base image using `scratch`
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+## Creating a simple base image using scratch
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-There is a special repository in the Docker registry called `scratch`, which
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-was created using an empty tar file:
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+You can use Docker's reserved, minimal image, `scratch`, as a starting point for building containers. Using the `scratch` "image" signals to the build process that you want the next command in the `Dockerfile` to be the first filesystem layer in your image.
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- $ tar cv --files-from /dev/null | docker import - scratch
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-
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-which you can `docker pull`. You can then use that
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-image to base your new minimal containers `FROM`:
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+While `scratch` appears in Docker's repository on the hub, you can't pull it, run it, or tag any image with the name `scratch`. Instead, you can refer to it in your `Dockerfile`. For example, to create a minimal container using `scratch`:
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FROM scratch
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- COPY true-asm /true
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- CMD ["/true"]
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+ ADD hello /
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+ CMD ["/hello"]
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+
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+This example creates the hello-world image used in the tutorials.
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+If you want to test it out, you can clone [the image repo](https://github.com/docker-library/hello-world)
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-The `Dockerfile` above is from an extremely minimal image - [tianon/true](
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-https://github.com/tianon/dockerfiles/tree/master/true).
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## More resources
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moxiegirl