= Proposed System Wide Change: Layered Docker Image Build Service =
https://fedoraproject.org/wiki/Changes/Layered_Docker_Image_Build_Service
Change owner(s):
* Colin Walters <walters AT redhat DOT com>
* Adam Miller <maxamillion AT gmail DOT com >
* Tomas Tomecek <ttomecek AT redhat DOT com>
* Tim Waugh <twaugh AT redhat DOT com>
Fedora currently ships a Docker base image, but Docker supports a layering
concept. There are some applications like Cockpit which we would like to ship
as layered applications.
This change will deploy the build service to support building and delivering a
set of layered Docker images, and will enable Fedora contributors to create and
maintain Dockerfiles from which those images will be generated.
== Detailed Description ==
This change opens up an new type of official binary artifact produced by
Fedora. Currently, we produce two main types of artifacts: RPMs, and images.
The RPMs are created in Koji from specfiles in dist-git. The images come in
different formats, but have in common creation in Koji from kickstart files —
this includes the official Fedora Docker Base Image. This change introduces a
new type of image, a Docker Layered Image, which is created from a Dockerfile
and builds on top of that base image.
The system has five major parts:
* A command-line client — already integrated into rpkg; needs only minor
work to enable in fedpkg
* dist-git for Dockerfiles
* A koji plugin, containerbuild
* An OpenShift 3 backend
* A distribution mechanism; initially, this will be
1. ftp/http mirror (either alt or main mirrors), and
2. pushed to upstream Docker hub (running our own registry is currently
out of scope; see below)
For more information, see this presentation for the high level overview of the
whole system.
== Scope ==
For the Scope of this Change please check
https://fedoraproject.org/wiki/Changes/Layered_Docker_Image_Build_Service#Scope
--
Jan Kuřík
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