Supported tags and respective
What is Ruby?
Ruby is a dynamic, reflective, object-oriented, general-purpose, open-source programming language. According to its authors, Ruby was influenced by Perl, Smalltalk, Eiffel, Ada, and Lisp. It supports multiple programming paradigms, including functional, object-oriented, and imperative. It also has a dynamic type system and automatic memory management.
How to use this image
Dockerfile in your Ruby app project
FROM ruby:2.1-onbuild CMD ["./your-daemon-or-script.rb"]
Put this file in the root of your app, next to the
This image includes multiple
ONBUILD triggers which should be all you need to bootstrap most applications. The build will
COPY . /usr/src/app and
RUN bundle install.
You can then build and run the Ruby image:
docker build -t my-ruby-app . docker run -it --name my-running-script my-ruby-app
onbuid tag expects a
Gemfile.lock in your app directory. This
docker run will help you generate one. Run it in the root of your app, next to the
docker run --rm -v "$PWD":/usr/src/app -w /usr/src/app ruby:2.1 bundle install
Run a single Ruby script
For many simple, single file projects, you may find it inconvenient to write a complete
Dockerfile. In such cases, you can run a Ruby script by using the Ruby Docker image directly:
docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp ruby:2.1 ruby your-daemon-or-script.rb
ruby images come in many flavors, each designed for a specific use case.
This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of. This tag is based off of
buildpack-deps is designed for the average user of docker who has many images on their system. It, by design, has a large number of extremely common Debian packages. This reduces the number of packages that images that derive from it need to install, thus reducing the overall size of all images on your system.
This image makes building derivative images easier. For most use cases, creating a
Dockerfile in the base of your project directory with the line
FROM ruby:onbuild will be enough to create a stand-alone image for your project.
This image does not contain the common packages contained in the default tag and only contains the minimal packages needed to run
ruby. Unless you are working in an environment where only the ruby image will be deployed and you have space constraints, we highly recommend using the default image of this repository.
View license information for the software contained in this image.
Supported Docker versions
This image is officially supported on Docker version 1.6.2.
Support for older versions (down to 1.0) is provided on a best-effort basis.
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