A brief introduction to docker. Demo: Run Bottle, a simple python web framework, in a docker container

1. Introduction to Docker
Willy Kuo
Feb 25, 2013

2. About Me
•
About me
•
Work at numerinfo.com
•
Organizor of
http://www.meetup.com/Docker-Taipei/
•
https://github.com/waitingkuo
•
waitinguo0527@gmail.com

3. The Challenge

4. The Matrix From Hell

5. Cargo Transport Pre-1960

6. The Matrix From Hell

7. Solution:
Intermodal Shipping Container

8. Docker is a shipping
container system for code

9. Docker eliminates the matrix
from hell

10. Deploy to almost anywhere
OK
Soon
Soon
?

11. VMs vs Containers

12. VMs vs Containers

13. Installation
•
Natively (Linux)
http://docs.docker.io/en/latest/installation/
#installation-list
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Boot2Docker (Linux, OSX)
https://github.com/boot2docker/boot2docker
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Vagrant
https://github.com/waitingkuo/docker-vagrant

14. Play Docker via Vagrant
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Install vagrant & virtualbox
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$ git clone https://github.com/waitingkuo/dockervagrant.git
$ cd docker-vagrant
$ vagrant up
$ vagrant ssh
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Start to play docker

15. Download a pre-built image
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$ docker pull ubuntu
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You can find more images here
https://index.docker.io/

16. Docker Images?
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$ docker images

17. Run Something…
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$ docker run ubuntu echo hi
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$ docker run ubuntu uname -a
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$ docker run ubuntu ifconfig

18. How about running bash?
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$ docker run ubuntu bash
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oops
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$ docker run -i -t ubuntu bash

19. Let’s install something
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$ docker run ubuntu apt-get install -y python-pip
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Try to install something via pip
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$ docker run ubuntu pip install bottle
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Where’s my pip?

20. docker ps
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$ docker ps
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Nothing …
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$ docker -a
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Too much …
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$ docker ps -l
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That’s it

21. Think about Git
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Coding…
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$ git add -A
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$ git commit -m ‘xxx’

22. Commit!!?
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$ docker commit <container-id> mypip
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Now, you have a new image called mypip
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$ docker images

23. Finally, you can use pip
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$ docker run mypip pip install bottle
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$ docker commit <container-id> mybottle

24. Time to run a web server
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Run a simple website using bottle framework
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https://github.com/waitingkuo/bottle-sample

25. Clone our project!
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First, we need git
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$ docker run mybottle apt-get install git-core
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uuuh… Seems we need to do apt-get update

26. Apt-get update and
install again
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$ docker run mybottle apt-get update
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$ docker commit <container-id> myupdate
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$ docker run myupdate apt-get install git-core
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$ docker commit <container-id> mygit

27. Clone our project part 2
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$ docker run mygit git clone https://github.com/
waitingkuo/bottle-sample.git
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docker commit <container-id> myweb

28. Bottle Rock
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$ docker run myweb python bottle-sample/app.py
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htttp://192.168.66.66:8080
(192.168.66.66 is the ip for the virtual machine we
create by vagrant)
•
What the fuckrock??

29. Port forwarding
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$ docker run -p 9999:8080 myweb python bottlesample/app.py

30. Daemonize?
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$ docker run -p 9999:8080 myweb python bottlesample/app.py
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Now, our web server is running in the background
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$ docker ps

31. Can we kill it?
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just like the kill command, except that we should
assign the container id instead of pid
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$ docker kill <container-id>

32. Dockerfile
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Tutorial: https://www.docker.io/learn/dockerfile/

33. Example
Dockerfile
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FROM ubuntu
RUN apt-get update
RUN apt-get install -y git-core
RUN apt-get install -y python-pip
RUN pip install bottle
RUN git clone https://github.com/waitingkuo/bottle-sample.git
CMD python bottle-sample/app.py

34. Build image by Dockerfile
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$ docker built -t myweb-2 . # don’t forget the .
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Now, you have a new image, myweb-2
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$ docker image
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$ docker run -p 9999:8080 myweb-2 python bottlesample/app.py

35. Think about GitHub
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We have already had docker commit
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Can I push my image to something like GitHub?

36. Docker Index
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https://index.docker.io/
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The place to find Docker container images
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Can automatically create Docker Image from your
project on Github, and keep them in sync

37. The basics of the
Docker System

38. Changes & Updates

39. Example Deploy Mongodb
•
https://index.docker.io/u/waitingkuo/mongodb/
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The Dockfile is hosted on Github
https://github.com/waitingkuo/dockerfiles/blob/
master/dockerfiles/mongodb/Dockerfile
•
$ docker run -d -p 27017:27017 -p 28017:28017
waitingkuo/mongodb
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Mongodb is running
http://192.168.66.66:28017/

40. Ecosystem - WebUI
•
dockerui
https://github.com/crosbymichael/dockerui
•
Shipyard
https://github.com/shipyard/shipyard

41. Ecosystem - PaaS
•
deis
https://github.com/opdemand/deis
•
dokku
https://github.com/progrium/dokku
•
flynn
https://flynn.io/

42. Ecosystem - CI
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drone
https://github.com/drone/drone
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StriderCD
http://stridercd.com/

43. Thank you!