ytakagi/ruby repository overview

⁠Ruby docker image

This docker image is used to create and develop ruby programs. It will install gems under project directory, so you can edit gems outside of container.

This image depends on official ruby image⁠, so image tag also correspond to it.

⁠Supported tags and respective Dockerfile links

⁠Setup

You can just use this image, but if you are using gems that depends on some packages, you have to create another Dockerfile. Below is just a sample.

FROM ytakagi/ruby:latest

RUN apt-get update \
 && apt-get install -y --no-install-recommends \
                    build-essential \
                    libpq-dev \
                    nodejs \
 && rm -rf /var/lib/apt/lists/* \
 && ln -s /usr/bin/nodejs /usr/bin/node

⁠Example

⁠Create Rails project

1. Create Gemfile

   cd /path/to/project/
   touch Gemfile
   

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   Edit Gemfile to be below.

   source 'https://rubygems.org'
   gem 'rails'
   

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2. Create Dockerfile and build

   Create the same Dockerfile shown at Setup section.

   docker build -t sample-image .
   

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3. Bundle install and Rails new

   docker run --rm -v $(pwd):/workdir sample-image bundle install
   docker run --rm -v $(pwd):/workdir sample-image bundle exec rails new . --force --database=postgresql --skip-bundle
   

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It's done!!

⁠Run Rails server

Note: you need to prepare other container such as database separately.

cd /path/to/project/
docker run -v $(pwd):/workdir sample-image bundle exec rails server

Now you can edit Rails program (also gem) from host machine, while running Rails server at container.

Sweet!!