BridgeDevProductionGapDocker.pdf

How many times have you implemented a feature in your development environment only to see it fail in production? This happens because our development, testing, and production environments often have significant differences that make shipping software less reliable. This talk will detail how to bridge this "gap" in environments with Docker.

Vagrant has helped us create reproducible development environments, but is hard to extend to production. Provisioning tools like Chef and Puppet can automate DevOps infrastructure, but aren't meant for development. Docker and containerization, however, allows us to duplicate our tools across environments to enable faster and more reliable deployments. We will learn about the best practices in achieving this goal, as well as the current challenges.

Transcript

1. Bridge The Dev/Production Gap With Docker John Oerter
2. email: contact@johnoerter.me twitter: @john_oerter slides: https://www.johnoerter.me/speaking/bridge- the-gap-with-docker feedback: http://bit.ly/docker-feedback-hdc16
6. Topics • Continuous delivery • Development/production parity • Reproducible development environments
7. Continuous Delivery •The app is always in a deployable state •Keeping software deployable is prioritized over new features •A deployment pipeline is used to automate as much as possible http://martinfowler.com/bliki/ContinuousDelivery.html
8. “Keep development, staging, and production as similar as possible“ - The Twelve Factor App https://12factor.net/dev-prod-parity Dev/Prod Parity
9. Reproducible Dev Environments
10. Docker Intro
11. Source: https://www.docker.com/what-docker VM Docker
12. namespaces cgroups union file systems
13. Dockerfile Image RegistrY Container
16. Image $ docker build -t my-app:1.0 . my-app:1.0
17. Registry $ docker push $ docker pull
18. Container
19. Dockerfile Image Registry Container $ docker build $ docker run $ docker push $ docker pull $ docker run
20. Compose Engine Swarm Machine Kitematic Registry Hub Cloud Datacenter Trusted Registry Universal Control Pane
21. Docker Compose Dockerfile docker-compose.yml $ docker-compose up
22. TOPICS • Continuous delivery • Development/production parity • Reproducible development environments
23. $ docker build my-app:latest . $ docker run my-app npm test Developers push a new version of the app to source control CI is triggered via webhook Docker image built from Dockerfile A container is created to run tests If the tests pass, the image is pushed to the Trusted Registry $ docker push my-app:latest $ git push origin master Run the updated image $ docker pull my-app:latest
24. Development Production OS PHP version Database OS X Linux Web server Apache Nginx 5.5 7.0 MySQL Postgres
26. "Before using Docker, we had issues with developers, CI and prod running sometimes different versions our datastores. By containerizing everything, we now develop on the exact same version/environment that is used on CI, staging and prod. If it works locally, we won’t have any surprises going through the pipeline." Matt Aimonetti, co-founder and CTO of Splice https://blog.docker.com/2016/06/docker-for-mac-splice/
27. • Background • http://www.infoworld.com/article/3072929/linux/containers-101-linux-containers-and-docker- explained.html • https://aucouranton.com/2014/06/13/linux-containers-parallels-lxc-openvz-docker-and-more/ • http://stackoverflow.com/questions/16047306/how-is-docker-different-from-a-normal-virtual- machine • In the wild • https://blog.docker.com/2014/06/dockercon-video-docket-at-spotify-by-rohan-singh/ • http://www.infoworld.com/article/3112875/application-development/lessons-from-launching- billions-of-docker-containers.html • https://www.infoq.com/presentations/test-container-stack? utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=global • Examples • https://github.com/docker/example-voting-app • https://github.com/joerter/gif-roulette • https://github.com/joerter/docker-chat • Docker in development • https://medium.com/iron-io-blog/why-and-how-to-use-docker-for-development- a156c1de3b24#.blx4d4j1k • https://www.smashingmagazine.com/2016/04/stop-installing-your-webdev-environment-locally- with-docker/ • Docker + ASP.NET Core • http://wildermuth.com/2016/03/28/Docker_and_ASP_NET_Core_A_Webcast • Docker + Node • http://jdlm.info/articles/2016/03/06/lessons-building-node-app-docker.html • Orchestration • https://docs.docker.com/swarm/ • http://kubernetes.io/