Slides related to a workshop in which we practice with the basics of Docker in order to build a 3 services app based on nginx, redis and php-fpm.

1. Docker: intro workshop
Dockerize your Web App: Nginx + Redis +PHP-FPM

2. Index
● What’s Docker
● Pros
● Containers vs VMs
● API
● Concept: Containers vs Images
● Security
● Workshop
● Docker-compose
● Summary
● Tips

3. What’s “that” whale called Docker?
Origin: LXC Run multiple isolated Linux systems on the same host

4. Time is money friend!
12 apps * 700MB = 8.5GB

5. VMs vs Containers

6. Client-Server model
https://github.com/docker -> go lang

7. VS

8. ● Hypervisor emulates hardware y kernel-> isolate
● Docker containers are implemented by the host kernel itself
● Hypervisor out the box vs Seccomp
(https://docs.docker.com/engine/security/seccomp/)
● Kernel exploit
● Resource starvation
● Container breakout
● In practice:
○ Another POV-> deployment
○ ¿kernel exploit?
Security

9. Containers vs Images

10. container = running image
Image: class
Container: instance
1 image -> * Containers
Senderismo...¿wtf?

11. Hello World
docker run hello-world

12. Dockerfile

14. Do I need Docker?
Give it an opportunity,for
example Redis.

15. Lab 1 - nginx
https://github.com/avcconti/dockerize-web-app

16. Lab 2 - nginx + PHP

17. Lab 3 - nginx + PHP + Redis

18. Lab 4 - nginx (entrypoint)+ PHP + Redis

19. entrypoint
CMD=> /bin/sh -c ‘/usr/sbin/php-fpm --nodaemonize’
exec "$@" -> /bin/sh -c ‘$ && /usr/sbin/php-fpm --nodaemonize’

20. Oh yeah baby, this is awesome, but...

22. Docker-compose.yml + 1 comando= done
Lab 5 - Docker-compose

24. Let’s play!
docker-compose -h

25. Summary
● Dockerfile
● docker image
● docker container
● docker network
● docker volume (--from)
● docker-compose

26. Cleaning
● docker system df [-v]
● docker container stop $(docker container ls -a -q)
● docker system prune [-a]

27. Tips
● Files
○ dockerfile
○ .dockerignore
○ docker-compose.yml
○ .env
● ENV variables
● Stateless apps
● Dockerfile instructions order: heaviest at top