Docker 101 session by Jonas Rosland at DevOps @ EMC, May 2015

1. DOCKER 101
Jonas Rosland
@jonasrosland

2. WHY IS THIS
INTERESTING?

3. LET’S START WITH A
MONOLITHIC APP

4. http://cantina.co/monolithic-architecture-doesnt-scale/

5. HOW DO WE SCALE IT?

6. http://cantina.co/monolithic-architecture-doesnt-scale/

7. http://cantina.co/monolithic-architecture-doesnt-scale/

8. IT’S NOT JUST
ALL ABOUT SCALE

9. BUT ALSO ABOUT
SEPARATION OF CONCERN

10. MICROSERVICES

11. http://cantina.co/monolithic-architecture-doesnt-scale/

12. EVERYTHING IS
LOOSELY COUPLED

13. HOW DO WE SCALE THIS?

14. http://cantina.co/monolithic-architecture-doesnt-scale/

15. SO HOW DO WE DEPLOY
IT?

16. ONE APP
PER PHYSICAL SERVER?

17. ONE APP
PER VIRTUAL MACHINE?

18. CONTAINERS!

19. https://www.flickr.com/photos/gcwest/281385801/

20. ONE FUNCTION
PER CONTAINER

21. TRADITIONAL SERVERS
OS Kernel
Hardware
App App App App

22. VIRTUALIZATION
Hypervisor
Hardware
OS OS OS OS
App App App App

23. CONTAINERS
OS Kernel
Hardware
App App App App

24. ISOLATION IS KEY

25. Python 2.7
JRE 8
NodeJS 0.12.2
Haskell 7.8.4
Go 1.4.2
Rust 1.0.0-beta.3
Ruby on Rails 4.2

26. Python 2.7
JRE 8
NodeJS 0.12.2
Haskell 7.8.4
Go 1.4.2
Rust 1.0.0-beta.3
Ruby on Rails 4.2

27. Python 2.7
JRE 8
NodeJS 0.12.2
Haskell 7.8.4
Go 1.4.2
Rust 1.0.0-beta.3
Ruby on Rails 4.2

28. Python 2.7
JRE 8
NodeJS 0.12.2
Haskell 7.8.4
Go 1.4.2
Rust 1.0.0-beta.3
Ruby on Rails 4.2
One host

29. Python 2.7
JRE 8
NodeJS 0.12.2
Haskell 7.8.4
Go 1.4.2
Rust 1.0.0-beta.3
Ruby on Rails 4.2
Host 2Host 1
Host 3
Host 4

30. WHAT ABOUT
ADDED FUNCTIONALITY?

31. HUGE ECOSYSTEM!

32. http://comp.photo777.org/wp-content/uploads/2014/09/Docker-ecosystem-8.2.pdf

33. RUN ANYTHING

34. RUN ANYWHERE

35. MORE INFO?

36. READ THIS
• docker.com
• The Docker Ecosystem by DigitalOcean
• Monolithic Architecture Doesn’t Scale