2014 12-03 - docker devops-tours
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This document provides an overview of Docker, including an analogy to describe containers, examples of how Docker can speed up development and deployment by packaging applications into containers, and a breakdown of key Docker concepts and commands like Dockerfile, docker build, docker run, docker images, and docker containers. It demonstrates how to build and run a simple nginx container, and discusses how Docker can help with continuous integration/deployment by allowing applications to be packaged and run consistently across different environments.
![Dockerfile, nginx
FROM ubuntu
MAINTAINER your@email.com
# Install deps
RUN sudo apt-get update && sudo apt-get install -y nginx
[ . . . ]
# Add some static files
ADD my-static-dir /usr/share/nginx/html/
# Expose ports
EXPOSE 80 443
# Run the server
CMD nginx](https://image.slidesharecdn.com/2014-12-03-dockerdevopstours-150414044328-conversion-gate01/85/2014-12-03-docker-devops-tours-15-320.jpg)
2014 12-03 - docker devops-tours
- 3. From industry to IT
- 4. From industry to IT
- 5. From industry to IT
- 6. Package it!
- 9. Success story – Speed: Boots in seconds – Footprint: 100-1000 containers by machine – Public registry: hundreds of useful containers – Build and versionning processes: git flavor
- 10. VM vs Container
- 11. Anatomy
- 12. Build once, run anywhere*
- 13. Docker lifecycle – A build produces an immuable image – A container is an instance of the image
- 14. Dockerfile – Describe the way to build your container – Imperative not Declarative – A mix of RUN, ADD commands
- 15. Dockerfile, nginx FROM ubuntu MAINTAINER your@email.com # Install deps RUN sudo apt-get update && sudo apt-get install -y nginx [ . . . ] # Add some static files ADD my-static-dir /usr/share/nginx/html/ # Expose ports EXPOSE 80 443 # Run the server CMD nginx
- 16. First build
- 17. Docker run – Create an instance of an image: container – Start the container with a specific config – Run runs a process and stops when it dies
- 18. Docker run docker run <mode> <ports> <volume> <image> <cmd>
- 19. First run
- 20. Docker run Daemon VS Interactive -it: foreground, attach a tty and STDIN -d: damonized container
- 21. Docker run Ports mapping -p <host>:<guest> // -p 8080:80 (map 8080 to 80) -p <ip>:<host>:<guest> // for listening interface All rules are iptables
- 22. Docker run Volume mount points -v <host_directory>:<target>
- 23. Docker run Override default usage /bin/bash: useful for debugging purposes /bootsrap.sh --with-my-config =value etc.
- 24. Docker run Other (very) cool stuff --net: DHCP/Host/Bridge --link + name: -e VAR=VAL: set env variables inside the container .dockerignore (like .gitignore)
- 25. Docker run Other (very) cool stuff (cont’d) --privileged and –CAP: for security --user: first owner --cpuset: assign vcore to the container See https://docs.docker.com/reference/run/#user
- 26. Demo
- 27. Docker lifecycle
- 28. CI, big picture
- 29. Support us! Guillaume Polaert / @gpolaert https://registry.hub.docker.com/u/ingensi
Editor's Notes
- #9: Propulsé par dotCloud, Mars 2013 Cgroups en 2006 par Google Solaris Containers 2004 Chroot en 1982 LXC en 2013 OpenVZ en 2005 Jailes BSD en 1985