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30 lines
916 B
30 lines
916 B
3 years ago
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Create a Dockerfile in your Ruby app project
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```
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FROM ruby:2.5
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# throw errors if Gemfile has been modified since Gemfile.lock
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RUN bundle config --global frozen 1
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WORKDIR /usr/src/app
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COPY Gemfile Gemfile.lock ./
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RUN bundle install
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COPY . .
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CMD ["./your-daemon-or-script.rb"]
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```
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Generate a Gemfile.lock
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The above example Dockerfile 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 Gemfile:
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```
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$ docker run --rm -v "$PWD":/usr/src/app -w /usr/src/app ruby:2.5 bundle install
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```
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Run a single Ruby script
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For many simple, single file projects, you may find it inconvenient to write a complete Dockerfile. In such cases, you can run a Ruby script by using the Ruby Docker image directly:
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```
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$ docker run -it --rm --name my-running-script -v "$PWD":/usr/src/myapp -w /usr/src/myapp ruby:2.5 ruby your-daemon-or-script.rb
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```
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