Docker from a team perspective
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Talk given at the first Docker meetup in Enschede, Holland. Explaining how Docker improves the workflow of software teams.
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Docker from a team perspective
- 1. Docker from a team perspective Edwin Vlieg - MoneyBird €
- 3. Ruby Postgres OSX Ruby Postgres OSX Ruby Postgres Linux UnicornProject UnicornProject UnicornProject
- 4. Ruby Postgres OSX Ruby Postgres OSX Ruby Postgres Linux UnicornProject UnicornProject UnicornProject We need GraphicsMagick
- 5. Ruby Postgres OSX Ruby Postgres OSX Ruby Postgres Linux UnicornProject UnicornProject UnicornProject You need GraphicsMagick! GM
- 6. OSX Ruby Postgres OSX Linux UnicornProject UnicornProject UnicornProject You need GraphicsMagick! GMRuby Postgres GM Ruby Postgres GM 30 minutes 15 minutes
- 7. Development • Always changing dependencies in projects • Keeping up with changes takes away productivity • Differences as small as a different patch level or different compile time argument can mean hours of debugging.
- 8. After development • Continuous Integration • Staging environment • Production environment
- 9. Ruby 2.1 Postgres OS UnicornProject Ruby 2.0 Redis Memcache ElasticSearch StorageProject Ruby 2.1 Postgres GM GhostScript PrinceXML
- 10. We tried • Automated provisioning of environments • Vagrant boxes with dependencies
- 11. OSX Ruby Postgres OSX Linux UnicornProject UnicornProject UnicornProject GMRuby Postgres GM Ruby Postgres GM Image
- 12. Image “A Docker image is a read-only template.”
- 13. StorageProject Ingredients Ubuntu OpenSSL Ruby Bundler GraphicsMagick PrinceXML Source code Image StorageProject Dockerfile FROM ubuntu RUN apt-get install openssl RUN apt-get install ruby RUN gem install bundler RUN apt-get install gm RUN princexml/install.sh ADD ./src/storage_project
- 14. Image • Create image from Dockerfile • Run image to create a container running the dependencies and source code • Result is the same on every host computer able to run a Docker host (Linux).
- 15. Ruby Postgres OSX Ruby Postgres OSX Ruby Postgres Linux UnicornProject UnicornProject UnicornProject ADD apt-get install gm
- 16. OSX Ruby Postgres OSX Linux UnicornProject UnicornProject UnicornProject Pull new image! GMRuby Postgres GM Ruby Postgres GM 30 seconds 30 seconds
- 17. Docker vs VMs App A Hypervisor (Type 2) Host OS Server Guest OS Bins/ Libs App A’ Guest OS Bins/ Libs App B Guest OS Bins/ Libs VM Guest OS Guest OS AppA Docker Host OS Server AppA Bins/Libs AppB AppB AppB AppB Container Bins/Libs
- 18. Backing services • We try to serve only 1 service in an image • Backing services like Postgres, Redis, ElasticSearch, Memcached have their own images
- 19. Conclusion • Docker makes dependency management and cooperation on projects way easier! • Less downtime during development and in production due to clear definition of required environment.