Docker in Practice

This talk covers some of the problems we face when working with non-trivial architectures and how Docker can help.

1. Docker in Practice Using Linux containers to run non-trivial architectures. Carlos Souza github.com/caike twitter.com/caike
2. Efficient Developers Quickly write and deploy applications to solve problems. Docker in Practice
3. Efficient Developers Quickly write and deploy applications to solve problems. Docker in Practice 1,000,000 things could go wrong 1,000,000 things
 will go wrong
4. Docker in Practice The Problem In Development: • Install language • Install dependencies • Install database • Link everything up
5. Docker in Practice The Problem In Development: • Install language • Install dependencies • Install database • Link everything up • Mess everything up and start again
6. Docker in Practice Development localhost App Server DB Server
7. Docker in Practice
8. In Production: The Problem • Install language • Install dependencies • Install database • Install web server • Link everything up
9. In Production: The Problem • Install language • Install dependencies • Install database • Install web server • Link everything up • Mess everything up and spend time fixing it
10. Docker in Practice
11. Docker in Practice Heroku is Sweet... Platform as a Service (PaaS)
12. Docker in Practice Heroku Can Get Pricey
13. Docker in Practice Heroku is Too Sweet Y'all Got Anymore of Them PaaS
14. Development / Production Disparity App Server DB Server
15. Development / Production Disparity Web Server App Server DB Server App Server App Server DB Server
16. Development == Production Web Server App Server DB Server App Server Web Server App Server DB Server App Server
17. Docker in Practice Nginx NodeJS NodeJS MongoDB The Tech We'll Use
18. Docker in Practice Solution #1 - All In One Nginx NodeJS NodeJS MongoDB Linux OS process process process process • Single OS • Multiple Processes • No Isolation
19. Docker in Practice Solution #2 - Virtual Machines Nginx VM OS VM OS VM OS VM OS Host Linux OS process process process process • Single Host OS • Multiple VM OS • Isolated Processes • Resource Intensive
20. Docker in Practice Solution #3 - Linux Containers Nginx NodeJS NodeJS MongoDB Linux OS container container container container process process process process • Single OS (shared kernel) • Multiple Containers • Isolated Processes • Low overheard
22. Docker Makes it easy to work with Linux containers. Docker in Practice
23. Docker in Practice Container Architecture Nginx NodeJS NodeJS MongoDB Linux OS (Docker host)
24. Docker in Practice Container Architecture Nginx NodeJS NodeJS MongoDB Linux OS (Docker host) • Separate applications from infrastructure • Shorten the cycle between writing code and running code
25. [ code demo ]
26. Build once and never change it again. Docker in Practice Immutable Infrastructure
27. Using Ansible we can automate server provisioning and deployment. Docker in Practice Automating Production
28. Docker in Practice Ansible Nginx NodeJS NodeJS MongoDB Production Linux OS 
 (Docker host) • Installs Docker • Fetches Docker images • Uploads source code • runs `docker-compose up` • (build images and run processes) Running On The Server:
29. [ code demo ]
30. Resources: Learning More • docker.com • dockerbook.com by James Turnbull • twitter.com/docker • pluralsight.com
31. Next Steps: Automate All The Things • Use Dockerhub • Use Github • Multi-Container Logging • Docker Swarm / Kubernetes
32. Thank you! Carlos Souza github.com/caike twitter.com/caike