33d876fda8
Adds information about Kubernetes integration & custom repository support as well as links to the relevant tracking issues.
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Nixery
This package implements a Docker-compatible container registry that is capable of transparently building and serving container images using Nix.
The project started out with the intention of becoming a Kubernetes controller that can serve declarative image specifications specified in CRDs as container images. The design for this is outlined in a public gist.
Currently it focuses on the ad-hoc creation of container images as outlined below with an example instance available at nixery.appspot.com.
This is not an officially supported Google project.
Ad-hoc container images
Nixery supports building images on-demand based on the image name. Every package that the user intends to include in the image is specified as a path component of the image name.
The path components refer to top-level keys in nixpkgs and are used to build a
container image using Nix's buildLayeredImage functionality.
The special meta-package shell provides an image base with many core
components (such as bash and coreutils) that users commonly expect in
interactive images.
Usage example
Using the publicly available Nixery instance at nixery.appspot.com, one could
retrieve a container image containing curl and an interactive shell like this:
tazjin@tazbox:~$ sudo docker run -ti nixery.appspot.com/shell/curl bash
Unable to find image 'nixery.appspot.com/shell/curl:latest' locally
latest: Pulling from shell/curl
7734b79e1ba1: Already exists
b0d2008d18cd: Pull complete
< ... some layers omitted ...>
Digest: sha256:178270bfe84f74548b6a43347d73524e5c2636875b673675db1547ec427cf302
Status: Downloaded newer image for nixery.appspot.com/shell/curl:latest
bash-4.4# curl --version
curl 7.64.0 (x86_64-pc-linux-gnu) libcurl/7.64.0 OpenSSL/1.0.2q zlib/1.2.11 libssh2/1.8.0 nghttp2/1.35.1
Roadmap
Custom Nix repository support
One part of the Nixery vision is support for a custom Nix repository that provides, for example, the internal packages of an organisation.
It should be possible to configure Nixery to build images from such a repository and serve them in order to make container images themselves close to invisible to the user.
See issue #3.
Kubernetes integration (in the future)
It should be trivial to deploy Nixery inside of a Kubernetes cluster with correct caching behaviour, addressing and so on.
See issue #4.