You will need roughly 4 minutes to read this article.
We’ve got quickstart repos, sample apps and a getting started guide available to make starting out with Codeship Pro faster and easier.
Any Ruby framework or tool that can run inside a Docker container will run on Codeship Pro. This documentation article will highlight simple configuration files for a Ruby-based Dockerfile with RSpec and Cucumber tests.
We have a sample Rails repo that you can clone or take a look at via the GitHub codeship-library/ruby-rails-todoapp repository. This may make a good starting point for your Rails or Ruby-based projects.
When accessing other running containers, please be aware that those services do not run on
localhost, but on a different host, e.g.
mysql. If you reference
localhost in any of your configuration files you will have to change that to point to the service name of the service you want to access. Setting them through environment variables and using those inside of your configuration files is the cleanest approach to setting up your build environment.
project_name: build: image: organisation_name/project_name dockerfile: Dockerfile depends_on: - redis - postgres environment: - DATABASE_URL=postgres://postgres@postgres/YOUR_DATABASE_NAME - REDIS_URL=redis://redis redis: image: healthcheck/redis:alpine postgres: image: healthcheck/postgres:alpine
Note that in this example we are using the healthcheck version of our Redis and PostgreSQL images to avoid startup timing issues.
The following is an example of a Codeship Steps file.
Note that every step runs in isolated containers, so changes made on one step do not persist to the next step. Because of this, any required setup commands, such as migrating a database, should be done via a custom Dockerfile, via a
entrypoint on a service or repeated on every step.
- name: ci type: parallel steps: - name: features service: project_name command: script/ci features - name: specs service: project_name command: script/ci specs - name: brakeman service: project_name command: script/ci brakeman - name: seeds service: project_name command: script/ci seed
Following is an example Dockerfile with inline comments describing each step in the file. The Dockerfile shows the different ways you can install extensions or dependencies so you can extend it to fit exactly what you need. Also take a look at the Ruby image documentation on the Docker Hub.
# We're using the Ruby 2.4 base image and extending it FROM ruby:2.4 # We install certain OS packages necessary for running our build # Node.js needs to be installed for compiling assets # libpq-dev is necessary for installing the pg gem # libmysqlclient-dev is necessary for installing the mysql2 gem RUN apt-get update && \ apt-get install -yq \ libmysqlclient-dev \ libpq-dev \ nodejs # INSTALL any further tools you need here so they are cached in the docker build # Create a directory for your application code and set it as the WORKDIR. All following commands will be run in this directory. RUN mkdir /app WORKDIR /app # Set the Rails Environment to test ENV RAILS_ENV test # COPY Gemfile and Gemfile.lock and install dependencies before adding the full code so the cache only # gets invalidated when dependencies are changed COPY Gemfile Gemfile.lock ./ RUN gem install bundler && bundle install -j20 # Copy the whole repository into the image COPY . ./
Because of version and test dependency issues, it is advised to try using the Jet CLI to debug issues locally via
You can enable caching per service in your Services file.
Do you think we need to improve this article? If so, please submit our feedback form to help us improve this article!