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I'm having a bit of a difficult time understanding how I can leverage my existing infrastructure code with Docker.

I have a Ruby on Rails app that uses capistrano to push out deployments. I want to use this capistrano script to create a new docker image. Can I push out a deploy and then use the deployed to directory to deploy on top of an existing image say, precise (since that matches my target OS).

Would this be the right approach or am I missing something?

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If you want to continue using capistrano to deploy your application, what role do you see docker playing? –  sciurus Mar 10 '14 at 0:32
@sciurus My application exists in two states - checked out from git for "development", or "deployed" via capistrano. I'm not sure how the "deployed" version differs from the "development" version. I want to take the "deployed" version and dockerify it. Then to "deploy" to other machines I could pass the docker image around. –  EightyEight Mar 10 '14 at 4:31

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