Building Python Web Apps with Docker - PyTexas 2015

Slides from my PyTexas 2015 talk about building Python apps using the Docker ecosystem!

Transcript

1. Building Python Web Apps with Docker Mark Adams • Bitbucket Developer • Atlassian • @markadams
2. What we'll cover (hopefully) What is Docker? A Python web app Docker Engine Docker Hub Docker Compose Docker Machine
3. What is ???
4. Traditional Virtual Machines APP A APP B LIBS LIBS GUEST OS GUEST OS HYPERVISOR HOST OS SERVER Robust Monolithic Slow to boot Heavy
5. Containers APP A APP B LIBS LIBS DOCKER HOST OS SERVER Lean Portable Lightweight Efficient Isolated
6. Where are containers useful?
10. Local Development
11. CI Builds Jenkins, Bamboo, etc.
12. Deploying to production and scaling!
14. Where do I get it?
15. Windows & Mac Docker Toolbox Installs Docker Client, Engine, Compose, Machine, Kitematic, and Virtualbox
16. 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 Downloads a shell script to install the right package for your system
17. Architecture
18. Demo App! https://bitbucket.org/markadams/pytexas-2015-demo
19. Docker Engine Builds images and runs containers Dockerfile F R O M p y t h o n : 3 . 4 E X P O S E 8 0 0 0 W O R K D I R / u s r / s r c / a p p # I n s t a l l d e p e n d e n c i e s C O P Y r e q u i r e m e n t s . t x t r e q u i r e m e n t s . t x t R U N p i p i n s t a l l ­ r r e q u i r e m e n t s . t x t # C o p y t h e r e s t o f t h e a p p l i c a t i o n ' s c o d e C O P Y . / u s r / s r c / a p p # R u n t h e a p p C M D [ " . / r u n _ a p p . s h " ] d o c k e r b u i l d builds an image d o c k e r r u n creates a container from an image and runs it d o c k e r l o g s shows the logs from a container d o c k e r p s shows what's running
20. Docker Hub http://hub.docker.com $ d o c k e r p u l l u b u n t u U s i n g d e f a u l t t a g : l a t e s t l a t e s t : P u l l i n g f r o m u b u n t u D o w n l o a d i n g 1 0 . 8 M B / 1 5 8 . 6 M B f e c 9 f e c 2 e 9 6 0 : D o w n l o a d c o m p l e t e 9 f 8 3 4 d b 6 f d 2 c : D o w n l o a d c o m p l e t e D o w n l o a d i n g 5 . 7 M B / 3 0 . 2 M B b 1 3 f b d a b 1 f 7 2 : D o w n l o a d c o m p l e t e 8 4 3 e 2 b d e d 4 9 8 : A l r e a d y e x i s t s d o c k e r p u s h pushes to the repository d o c k e r p u l l pulls an image from the repository Public or Private
21. Docker Compose Describes the components of an application YML Config w e b : b u i l d : . l i n k s : ­ ' d b ' p o r t s : ­ ' 8 0 0 0 : 8 0 0 0 ' e n v i r o n m e n t : ­ ' D A T A B A S E _ H O S T = d b ' ­ ' D A T A B A S E _ N A M E = p o s t g r e s ' ­ ' D A T A B A S E _ U S E R = p o s t g r e s ' ­ ' D A T A B A S E _ P A S S W O R D = p o s t g r e s ' d b : i m a g e : p o s t g r e s : 9 . 4 d o c k e r - c o m p o s e u p starts all the containers d o c k e r - c o m p o s e b u i l d rebuilds your images d o c k e r - c o m p o s e s t o p stopps the containers
22. Docker Machine Provisions and manages Docker hosts Works with ­ a m a z o n e c 2 ­ a z u r e ­ d i g i t a l o c e a n ­ e x o s c a l e ­ g o o g l e ­ o p e n s t a c k ­ r a c k s p a c e ­ s o f t l a y e r ­ v i r t u a l b o x ­ v m w a r e v c l o u d a i r ­ v m w a r e v s p h e r e d o c k e r - m a c h i n e c r e a t e creates a new Docker host d o c k e r - m a c h i n e s s h connects to the host using SSH d o c k e r - m a c h i n e r m destroys the host d o c k e r - m a c h i n e e n v sets environment variables for your client to connect to the host
23. Demo 2:15
24. Orchestration!
25. Thank you! @markadams https://bitbucket.org/markadams/pytexas-2015