DockerDeploy

Deploy docker containers via Rake. This is especially useful for dockerized Ruby applications.

Installation

Add this line to your application's Gemfile:

gem "docker_deploy", require: false

Usage

In your Rakefile define your deployment setup like this:

require "docker_deploy"

DockerDeploy.task do
  image "elabs/projectpuzzle"

  env "RAILS_ENV" => "production"

  port 80 => 3000

  stage :staging do
    server "ubuntu@staging.projectpuzzle.com"

    env "CANONICAL_HOST" => "staging.projectpuzzle.com"

    host "http://staging.projectpuzzle.com"
  end

  stage :production do
    server "ubuntu@app1.projectpuzzle.com"
    server "ubuntu@app2.projectpuzzle.com"

    env "CANONICAL_HOST" => "projectpuzzle.com"

    host "http://projectpuzzle.com"
  end
end

If you're packaging a Rails application you might want to add this in lib/tasks/docker.rake instead.

DockerDeploy has now generated a ton of rake tasks for you. You can inspect which ones are available by running:

rake -T docker

To deploy your application to the server, the server must have docker installed and running and available without sudo. See the docker documentation on setting this up. Try running:

rake docker:staging:deploy

This should package your application, send it to the docker registry, pull it down on the remote server and finally run it as a docker container.

Adding a Dockerfile

These instructions assume you already have a Dockerfile set up. If you want to package a Rails application, this might give you something to get you started:

FROM rails:onbuild
RUN bundle exec rake assets:precompile

Known issues

• The console task is currently broken. We were unable to figure out how to create an interactive session via sshkit.

License

MIT