Docker 101 - From Development to Production and back

Presented at TYPO3 Developer Days 2015

Transcript

1. Docker 101 From Development to Production and back by / Dmitri Pisarev @dimaip
2. Work and study in — first independant Christian Theological University in Russia Worked with TYPO3 since 2006 One year ago first installed Neos... And loved it! Neos contributor since then SFI.ru
3. What's Docker?
4. The Next Big Thing? You bet! Just look at the growth stats:
5. Extremly lightweight VM? Almost. At least it feels like one Virtual Machines Containers Way less fat here!
6. FreeBSD jails on steroids? Yes, but we had that years ago... n a m e s p a c e s isolation c g r o u p s resource control l i b c o n t a i n e r Docker container format U n i o n F S fast copy-on-write filesystem
7. Official answer Docker is an open platform for developing, shipping, and running (distributed) applications
8. What problems does it solve? 1. Setup development environments in minutes 2. Have identical environment in production and development 3. Freedom to try new things without worrying about infrastructure
9. Key terms Container Image Image registry
10. Container Container is an isolated and secure application platform, that holds everything that is needed for an application to run
11. Image A Docker image is a read-only template used to create Docker containers
12. Image registry Docker registries hold images. The public Docker registry is called Docker Hub.
13. Architecture overview
14. Join the session now! Stuff to expect: Install the thing Learn the basic usage Going to production And much more!
15. ...where we le off Agenda: Installation Managing data in containers Orchestration with Docker Compose Going to production
16. Getting started
17. It just works. Installation on Linux w g e t ­ q O ­ h t t p s : / / g e t . d o c k e r . c o m / | s h
18. Installation on Mac/Windows “All hope abandon ye who enter here” ~Dante Alighieri, 1321AD You need boot2docker VM Use OSX or Windows installer Try without host volumes first Be ready for trouble! http://files.t3dd15.typo3.org/
19. Create and start a container d o c k e r r u n ­ i ­ t b u s y b o x s h
20. Managing data in containers
21. The versioned filesystem in Docker is based on layers. They're like git commits or changesets for filesystems. Layered filesystem
22. Filesystem mounts outside of UFS. Can even be mounted from host OS. Data volumes / v a r / l i b / d o c k e r / v o l u m e s / f e 0 4 a 9 4 d f a a d 3 d 9 e f a 9 9 c 8 1 b d 7 9 a 4 2 b 3 8 3 b 5 5 1 7 1 . . .
23. You should use volumes mounted from data-only containers for portability Data-only containers
24. Docker Compose
25. Data-only containers in practice d b d a t a : i m a g e : b u s y b o x : l a t e s t c o m m a n d : e c h o d b d a t a v o l u m e s : ­ / v a r / l i b / m y s q l w e b d a t a : i m a g e : b u s y b o x : l a t e s t c o m m a n d : e c h o w e b d a t a v o l u m e s : ­ d a t a : / d a t a
26. Good old mySQL database d b : i m a g e : m i l l i o n 1 2 / m a r i a d b : l a t e s t p o r t s : ­ 3 3 0 6 v o l u m e s _ f r o m : ­ d b d a t a e n v i r o n m e n t : M A R I A D B _ P A S S : p a s s r e s t a r t : a l w a y s
27. Web container with Neos demo site w e b : i m a g e : m i l l i o n 1 2 / t y p o 3 ­ n e o s p o r t s : ­ ' 8 0 ' l i n k s : ­ d b : d b v o l u m e s _ f r o m : ­ w e b d a t a e n v i r o n m e n t : V I R T U A L _ H O S T : ' n e o s m . d e v , d e v . n e o s m . d e v ' T 3 A P P _ N A M E : ' n e o s m . d e v ' T 3 A P P _ N E O S _ S I T E _ P A C K A G E : ' T Y P O 3 . N e o s D e m o T y p o 3 O r g ' r e s t a r t : a l w a y s
28. SSH container s s h : i m a g e : m i l l i o n 1 2 / p h p ­ a p p ­ s s h p o r t s : ­ ' 2 2 ' l i n k s : ­ d b : d b ­ w e b : w e b v o l u m e s _ f r o m : ­ w e b d a t a ­ d b d a t a e n v i r o n m e n t : I M P O R T _ G I T H U B _ P U B _ K E Y S : d i m a i p r e s t a r t : a l w a y s
29. Redis in a few lines of code r e d i s : i m a g e : r e d i s
30. To Production!
31. Nginx reverse proxy Internet Users Host machine LISTEN 0.0.0.0:80 Reverse proxy Web container Storage container MySQL Nginx php­fpm Neos proxypass
32. docker-gen https://github.com/jwilder/docker-gen Generate any sorts of configs based on data from running docker containers Reverse-proxy configs SSH config file Whatever you like!
33. Deploying containers 1. Merge change to master branch on Github 2. Image is automatically rebuilt on Docker Hub 3. Pull new image, run it in parallel with the old one, test 4. Redirect traffic to new container, stop the old one 5. Rollback if things go wrong Great for big infrastructure changes, but slow for code-only deploys
34. Hybrid deploy For small code changes: 1. Merge change to master branch on Github 2. CI tool of choice tests the build 3. Surf deploys code changes via SSH container And for big ones do full container re-deploy