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# Gentoo Docker Images
[![Build Status](https://travis-ci.org/gentoo/gentoo-docker-images.svg?branch=master)](https://travis-ci.org/gentoo/gentoo-docker-images)
A collection of Dockerfiles for generating Gentoo docker images.
These images are intended to be created automatically by
a travis cron job and pushed to [docker hub](https://hub.docker.com/u/gentoo/).
This repository include basic stage3 images and an image usable as a `/usr/portage` volume
# DockerHub
https://hub.docker.com/u/gentoo/
## Inventory
* portage
* stage3
* stage3-amd64
* stage3-amd64-hardened
* stage3-amd64-nomultilib
* stage3-amd64-hardened-nomultilib
* stage3-x86
* stage3-x86-hardened
# Building the containers
The containers are created using a multi-stage build, which requires docker-17.05.0 or later.
The container being built is defined by the TARGET environment variable:
`` TARGET=stage3-amd64 ./build.sh ``
# Using the portage container as a data volume
```
docker create -v /usr/portage --name myportagesnapshot gentoo/portage:latest /bin/true
docker run --volumes-from myportagesnapshot gentoo/stage3-amd64:latest /bin/bash
```
# Using the portage container in a multi-stage build
docker-17.05.0 or later supports multi-stage builds, allowing the portage volume to be used when creating images based on a stage3 image.
Example _Dockerfile_
```
# name the portage image
FROM gentoo/portage:latest as portage
# image is based on stage3-amd64
FROM gentoo/stage3-amd64:latest
# copy the entire portage volume in
COPY --from=portage /usr/portage /usr/portage
# continue with image build ...
RUN emerge -qv www-servers/apache # or whichever packages you need
```
# Contributing
We'd love to hear any ideas. Feel free to contact us via any of the following
methods:
* IRC: irc://freenode.net/#gentoo-containers
* EMAIL: gentoo-containers@lists.gentoo.org
* GITHUB: https://github.com/gentoo/gentoo-docker-images
## Policy
* Use topic branches (i.e. foo) and fix branches (i.e. fix/foo) when submitting
pull requests
* Make meaningful commits ideally with the following form:
* Subject line–what this commit does
* Blank line
* Body–why this commit is necessary or desired
* Pull requests should not include merge commits
* Use amend and rebase to fix commits after a pull request has been submitted
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