Docker image with gitlab-ci-multi-runner to run builds with ruby

Docker image with gitlab-ci-multi-runner, which can run ruby builds. It uses rbenv to manage ruby versions.

How to use

Example of Docker Compose file (docker-compose.yml)

vrunner:
  image: busybox
    volumes:
        - /home/gitlab_ci_multi_runner/data

runner:
    image: outcoldman/gitlab-ci-multi-runner-ruby:latest
    volumes_from:
        - vrunner
    environment:
        - CI_SERVER_URL=https://gitlabci.example.com
        - RUNNER_TOKEN=YOUR_TOKEN_FROM_GITLABCI
    restart: always

Replace CI_SERVER_URL and RUNNER_TOKEN.

Run it

docker-compose up -d

Or using docker command line

docker run -d --env "CI_SERVER_URL=https://gitlabci.example.com" \
              --env "RUNNER_TOKEN=YOUR_TOKEN_FROM_GITLABCI" \
              --restart="always" \
              --name=ruby_runner \
              outcoldman/gitlab-ci-multi-runner-ruby:latest

In your project add .gitlab-ci.yml

before_script:
    - RBENV_VERSION=2.0.0-p645 rbenv install -s
    - RBENV_VERSION=2.0.0-p645 rbenv exec gem install bundle
    - RBENV_VERSION=2.0.0-p645 rbenv exec bundle install

build:
    script:
        - RBENV_VERSION=2.0.0-p645 rbenv ruby --version
    tags:
        - ruby

before_script will install required ruby version specified with RBENV_VERSION, install bundle and gems from your Gemfile.

build will invoke ruby and ask ruby version.

More information

• Read about gitlab-ci-multi-runner to learn how integration works with GitLab CI.
• This image is using rbenv to maintain multilpe ruby versions. You can find other way how you can control ruby version, like instead of RBENV_VERSION you can use .ruby-version file.
• This image is using ruby-build to build ruby versions.
• This image is based on docker-gitlab-ci-multi-runner, which handles registration and startup.