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68 lines
2.6 KiB
Markdown
68 lines
2.6 KiB
Markdown
page_title: Create a Base Image
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page_description: How to create base images
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page_keywords: Examples, Usage, base image, docker, documentation, examples
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# Create a Base Image
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So you want to create your own [*Base Image*](
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/terms/image/#base-image-def)? Great!
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The specific process will depend heavily on the Linux distribution you
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want to package. We have some examples below, and you are encouraged to
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submit pull requests to contribute new ones.
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## Create a full image using tar
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In general, you'll want to start with a working machine that is running
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the distribution you'd like to package as a base image, though that is
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not required for some tools like Debian's
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[Debootstrap](https://wiki.debian.org/Debootstrap), which you can also
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use to build Ubuntu images.
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It can be as simple as this to create an Ubuntu base image:
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$ sudo debootstrap raring raring > /dev/null
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$ sudo tar -C raring -c . | sudo docker import - raring
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a29c15f1bf7a
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$ sudo docker run raring cat /etc/lsb-release
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DISTRIB_ID=Ubuntu
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DISTRIB_RELEASE=13.04
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DISTRIB_CODENAME=raring
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DISTRIB_DESCRIPTION="Ubuntu 13.04"
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There are more example scripts for creating base images in the Docker
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GitHub Repo:
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- [BusyBox](https://github.com/docker/docker/blob/master/contrib/mkimage-busybox.sh)
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- CentOS / Scientific Linux CERN (SLC) [on Debian/Ubuntu](
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https://github.com/docker/docker/blob/master/contrib/mkimage-rinse.sh) or
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[on CentOS/RHEL/SLC/etc.](
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https://github.com/docker/docker/blob/master/contrib/mkimage-yum.sh)
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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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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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$ tar cv --files-from /dev/null | docker import - scratch
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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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FROM scratch
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COPY true-asm /true
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CMD ["/true"]
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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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There are lots more resources available to help you write your 'Dockerfile`.
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* There's a [complete guide to all the instructions](/reference/builder/) available for use in a `Dockerfile` in the reference section.
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* To help you write a clear, readable, maintainable `Dockerfile`, we've also
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written a [`Dockerfile` Best Practices guide](/articles/dockerfile_best-practices).
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* If you're working on an Official Repo, be sure to check out the [Official Repo Guidelines](/docker-hub/official_repos/).
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