This document provides an introduction to Docker, describing it as a way to build, ship, and run applications using containers. It discusses how Docker allows building applications once that can run anywhere, isolated and layered for portability and efficiency. Key benefits outlined include clean and portable applications, efficient operations, and support for continuous integration and deployment workflows.

1. Introduction to Docker
Containerization is the new virtualization
James Turnbull
@kartar
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2. who
• VP of Engineering at Kickstarter
• Advisor at Docker
• Open source chap
• Funny accent
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3. Kickstarter live in
Sweden
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4. The Docker Book
www.dockerbook.com
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5. Who are you folks?
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6. What's this all about?
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7. What is Docker?
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8. Container
virtualization
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9. Build, ship, run
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10. Build once
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11. Run in many places
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12. Isolated
Layered
Standard
Content agnostic
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13. But this isn't new?!?
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14. So why should I care?
Software delivery mechanism
Portability
A bit like a VM but ...
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15. ... not like a VM
1. Containers boot faster
2. Containers have less overhead
3. Containers bring native performance
4. Containers are Cloud & VM-compatible
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16. Devs care about their
app
Ops cares about the
containers
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17. Why developers care...
• Clean, safe, hygienic and portable
• No worries about dependencies
• Encourage good architecture
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18. Why operations care...
• Make the lifecycle more efficient
• Eliminate inconsistencies
• Support segregation of duties
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19. What can I use Docker for?
• Docker for CI/CD
• Packaging and deploying applications
• Build your own PAAS
• Deploy applications at hyperscale!
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20. Does this work with Puppet or Chef?
• Chef and Puppet are state management tools
• Less complex
• Docker images are version controlled and layered
• Smaller, self-contained and lightweight
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21. Technology Stack
• Runs on most Linux distros
• Boot2Docker for OSX and Windows
• Windows in the works!
• Uses Linux kernel features
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22. Docker Basics
Image & Dockerfile
The Docker Hub
Container
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23. Building Docker images
FROM ubuntu
MAINTAINER James Turnbull "james@example.com"
RUN apt-get -qqy update
RUN apt-get install -qqy apache2
ADD index.html /var/www/
ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2
VOLUME [ "/var/log/apache2" ]
EXPOSE 80
ENTRYPOINT ["/usr/sbin/apache2"]
CMD ["-D", "FOREGROUND"]
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24. Building the image
$ sudo docker build -t="jamtur01/0redev" .
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25. Sharing the image
$ sudo docker push jamtur01/0redev
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26. Running the container
$ sudo docker run --name mywebsite -ti -p 80:80 jamtur01/0redev
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27. But there's more!
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28. What if we could
componentize . . .
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29. SSH
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30. Managing a container
$ sudo docker exec -ti mywebsite /bin/bash
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31. Scheduling and jobs
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32. Logging
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33. Logging container
$ sudo docker run --volumes-from mywebsite -ti ubuntu tail -f /var/log/apache2/acccess.log
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34. Creates a new
architecture
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35. A new architecture that ...
• Separates orthogonal concerns
• Don't rebuild your app to change services
• Have different policies in domains
• Ship lighter apps
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36. Questions?
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