gitlab-build-images/README.md
Zeger-Jan van de Weg ea0ff96ca9
Update license and contributing.md
Project is still MIT licensed, according to: gitlab-com/organization#146
2017-11-14 14:57:23 +01:00

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This repository is used to build docker images that are used to build and test
various parts of GitLab:
1. Build Omnibus packages
1. Test GitLab-CE/EE project
1. Build gitlab-org/www-gitlab-com project
# Adding a new image
There are two methods to adding a new image:
1. Use a docker buildfile
2. Use a custom image with versioned features
## Use a docker buildfile
A bespoke image is one that uses it's own Dockerfile. In the interests of
avoiding repetition, it's better to use the custom docker build if possible.
Assuming the image you want to add is called `new-image`....
1. Add a test task: `new-image test: *test_build`
1. Add a new build task: `new-image: *build_and_deploy`
1. Add a Dockerfile: `Dockerfile.new-image`
## Use a custom image with versioned features
To add a new image to the build, edit [`.gitlab-ci.yml`](https://gitlab.com/gitlab-org/gitlab-build-images/blob/master/.gitlab-ci.yml).
With custom images, the name of the image is used to define the contents (as opposed to use a bespoke Dockerfile build).
For this reason, the name needs to be correctly defined.
The name is defined as `[feature]-[version]` pairs, separated by `-`.
Here are some example build names:
1. `ruby-2.1-git-2.7-phantomjs-2.1`
1. `ruby-2.3.3-golang-1.8-git-2.7-chrome-60.0-node-7.1-postgresql-9.6`
1. `ruby-2.4.1-golang-1.8-git-2.7-phantomjs-2.1-node-7.1-postgresql-9.6`
The first pair represents the base image and version. So `ruby-2.1-...` will use the `ruby:2.1` base image, while
`golang-1.8` will use the `golang:1.8` base image.
Each of the following parts represents another feature and version. Available
options are:
1. `golang`
2. `git`
3. `chrome`
4. `node`
5. `yarn`
6. `phantomjs`
7. `postgres`
### Adding a new build
As an example, if you want to add new image for Ruby 2.4 with `git` 2.14 and `golang` 1.9,
the name would be `ruby-2.4-golang-1.9-git-2.14`.
1. Add a test task: `ruby-2.4-golang-1.9-git-2.14 test: *test_custom`
1. Add a new build task: `ruby-2.4-golang-1.9-git-2.14: *build_and_deploy_custom`
# Note regarding Google Chrome
Google has a policy of yanking older versions of Google Chrome from their PPA whenever a new major
version is released. This means images with non-current chrome versions will fail to build. Until
a better solution is worked out, we will remove images based on older Chrome versions from the build
process, but preserve them for reference within a comment in the `.gitlab-ci.yml` file.
These images will persist in the docker repository for legacy use, but will no longer be recompiled.
If an update ever needs to be made to an image containing an older version of Chrome, a workaround
can be modeled after https://gitlab.com/gitlab-org/gitlab-build-images/merge_requests/54
# Contributing
See [Contributing](CONTRIBUTING.md)