Dockercon Europe: Migrating Large Codebases To Containers

Talk given at the first European Docker Conference.

Taking a codebase not designed for docker into containers..

Transcript

1. Migrating a large code-base to containers
4. @_dougjohnson @jlozinski
20. source “http://rubygems.org” ! gem ‘rails’, ‘4.1.7’ gem ‘mysql2’ gem ‘jquery-rails’
21. FROM ruby ! ADD . /var/www RUN bundle install ! CMD bundle exec rails s
22. FROM ruby ! ADD Gemfile /var/www/Gemfile ADD Gemfile.lock /var/www/Gemfile.lock RUN bundle install ! ADD . /var/www/ CMD bundle exec rails s
23. x != x
24. FROM app_base_with_gems ! ADD Gemfile /var/www/Gemfile ADD Gemfile.lock /var/www/Gemfile.lock RUN bundle install ! ADD . /var/www ! CMD bundle exec rails s
25. source “http://rubygems.org” source “https://private.server.com” ! git “git@github.com:MyOrg/private.git” do gem “private_gem” end
27. docker run -v $(pwd):/var/www \ -v $HOME/.ssh:/root/.ssh \ my_base_ruby \ bundle install —path=/var/www/bundle ! docker build -t myapp_base . docker run -v $(pwd):/var/www \ -v $HOME/.ssh:/root/.ssh \ my_base_ruby \ bundle install —path=/var/www/bundle ! docker build -t myapp_base . docker run -v $(pwd):/var/www \ -v $HOME/.ssh:/root/.ssh \ my_base_ruby \ bundle install —path=/var/www/bundle ! docker build -t myapp_base . docker run -v $(pwd):/var/www \ -v $HOME/.ssh:/root/.ssh \ my_base_ruby \ bundle install —path=/var/www/bundle ! docker build -t myapp_base .
29. docker build -t $TAG . docker run --name=$TAG \ --link=runningdb:db \ $TAG \ sh -c ‘bundle exec rake app:prepare’ docker commit $TAG $TAG docker rm $TAG
30. docker build -t $TAG . docker run --name=$TAG \ --link=runningdb:db \ $TAG \ sh -c ‘bundle exec rake app:prepare’ docker commit $TAG $TAG docker rm $TAG ! #Restore original CMD docker run -d --name=$TAG \ $TAG \ sh -c ‘bundle exec rails s’ docker commit $TAG $TAG docker rm $TAG
35. ?
36. https://github.com/navy-project
39. Thank You.