Python Apps and Docker - Matt Wright

An overview of why and how one might use Docker for Python applications

1. Python Apps & Docker @pygotham 2014
2. Matt Wright @mattupstate Software/Ops Engineer @ChatID • Python, Lua, CoffeeScript • Flask, Prosody, Backbone, Angular Open Source • Author: Flask-Security, Flask-JWT, ... • Contributor: Ansible, Flask • Member: metaflask
3. What’s all the fuss about?
4. “... an open platform for developers and sysadmins to build, ship, and run distributed applications.” http://docker.com/whatisdocker Docker:
5. Images A stateless, read-only collection of “layers” joined together via a union filesystem. Containers A stateful instance of an image in which one or more processes are running or have exited Docker: Concepts
6. Docker: Components Docker Engine A portable, lightweight system level daemon that manages images and containers Docker Hub A web service for distributing images and enabling automated workflows
7. Docker Hub Server Docker Engine Docker CLI Containers Images Docker: Birds Eye View Repository Images Repository Images Repository Images Repository Images
8. • Development Environments • Application Deployment • Continuous Integration • Continuous Delivery • Platform-as-a-Service (PaaS) Docker: Use Cases
9. Tooling Kubernetes Marathon maestro-ng Shipyard fig Platforms Elastic Beanstalk CoreOS flynn.io deis.io Docker: Landscape SaaS circleci.com shippable.com drone.io quay.io and many more (to come) ...
10. boot2docker https://coderwall.com/p/fvfjyg
11. +
12. Development Environments
13. • OS • System libraries • Python dependencies • Database, cache, etc Dev Env: Components
14. • Constantly change • Never truly consistent • Miscommunication (Ops vs. Devs) • “Drift” Dev Env: Problems
15. • README • Stacks (LAMP, XAMP) • Virtual Machines • Vagrant + (Chef | Puppet | Ansible) Dev Envs: Before
16. • Easy to change and share • Always consistent • 100% Isolated • Single authority • Production ready! Dev Envs: Docker!
17. Dockerfile
18. Testing
19. Fig $ pip install fig
20. Production Ready
21. • Be skeptical of Docker dogma • Keep secrets out of env vars • Don’t use Docker for everything • Design images carefully Docker Tips
22. Thank You! mattupstate.com gittip.com/mattupstate github.com/mattupstate twitter.com/mattupstate