Apresentação realizada durante o primeiro FOSS Day 2018 em Lajeado/RS.

1. WORKSHOP
Rafael Dutra - FOSS Day Lajeado 2018
@raffaeldutra - Lajeado/RS

2. WHO AM I?
● Rafael Dutra
● SysAdmin and DevOps Enthusiast
● Security Information - UNISINOS 2008 - ?
● Linux user since 2005
● Docker user since 2015
● PHP (Laravel)/Shell/Ruby

3. WORKING WITH/AT
Vagrant, Puppet, Continuous Integration, Continuous
Deployment, Shell Scripting, Docker, AWS (learning) ...
Shared Services Ops Team
@crossover - https://crossover.com
@jivesoftware - https://jivesoftware.com
@aurea - https://www.aurea.com

4. AGENDA
● What’s Docker?
● Container vs Virtual Machine
● Why should I use Docker?
● Terminology
● Images and Layers
● Containers and Layers
● Dockerfile anatomy

5. WHAT'S DOCKER?
● Open Source technology
● Agility, accelerate software development and
deployment
● Portability, eliminate the "works on my machine"
● Container is not Virtual Machine

6. CONTAINER VS VIRTUAL MACHINES

7. WHY SHOULD I USE DOCKER?
● Infrastructure as Code - IAC
● All application is an image
● Works on my machine, no more!
● Set up locally the same environment that you have in
production, or any other environment
● Tests, a lot of them
● Community

8. TERMINOLOGY
● Images = is our “how it was built” / what we want to
run it
● Containers = runs images in a dynamic way. By
dynamic I meant multiple containers can run the same
image doing different things.
● Volumes = where we want to store our data, could be
our physical directory or a docker volume

9. IMAGES AND LAYERS

10. CONTAINERS AND LAYERS

11. DOCKERFILE
# imagem base
FROM nginx
# copiando arquivo para um diretório específico
COPY index.html /usr/share/nginx/html
# rodando aplicação
CMD ["nginx", "-g", "daemon off;"]

12. HANDS ON

13. HANDS ON AGENDA
● Docker installation
● The basics, running containers
● Interacting with containers
● Dockerfile
● Using volumes
● Docker Compose

14. DOCKER INSTALLATION
● Ubuntu: https://goo.gl/YFDkpv
● Debian: https://goo.gl/T6pmJd

15. DOCKER BASICS
Full commands
docker

16. DOCKER BASICS
Need a medic? ask for help
docker <command> --help

17. DOCKER BASICS
Running our first container
docker run alpine hostname

18. DOCKER BASICS
Running our second container
docker run hello-world

19. DOCKER BASICS
Everything comes from an image
docker run alpine hostname

20. DOCKER BASICS
To list all images
docker image ls

21. DOCKER BASICS
To search an image
docker search alpine

22. DOCKER BASICS
To remove an image
docker image rm alpine

23. DOCKER BASICS
To pull (download) an image
docker image pull ubuntu

24. DOCKER BASICS
To pull (download) an specific image version
docker image pull ubuntu:17.10

25. DOCKER BASICS
Running our first web container
docker run --detach --publish 45000:80 nginx
● action that we want to do
● options to detach (run it in background) and publish ports
● port that we want to access in our machine
● port running in the container
● image we are using at this moment

26. MANIPULATE CONTAINERS
To list running containers
docker container ls

27. MANIPULATE CONTAINERS
To list all containers
docker container ls -a

28. MANIPULATE CONTAINERS
Stopping a container
docker container stop <id>

29. MANIPULATE CONTAINERS
Starting a container
docker container start <id>

30. MANIPULATE CONTAINERS
Interacting with them
docker run --interactive --tty ubuntu /bin/bash

31. MANIPULATE CONTAINERS
Executing …. something without enter in a container
docker exec <id> <command>

32. MANIPULATE CONTAINERS
Attaching
docker attach <id>

33. CREATING IMAGES
FROM php:7.2.5-cli-alpine3.7
CMD ["php", "--version"]

34. CREATING IMAGES
docker build --tag fossday/php:7.2 .

35. RUN FORREST … RUN
docker run --rm fossday/php:7.2

36. RUN FORREST … RUN
docker run --rm fossday/php:7.2 --help

37. RUN FORREST … RUN WITH MATH
<?php
$val1 = 60;
$val2 = 20;
echo "Soma de ${val1} + ${val2} igual a: " .
($val1 + $val2) . "n";

38. RUN FORREST … RUN
docker run --rm
-v $(pwd)/soma.php:/root/soma.php
fossday/php:7.2
php -f /root/soma.php

39. CLEANING
Remove all images that we’re not using (dangling)
docker image prune

40. CLEANING
Remove all containers that are in stopped state (dangling)
docker container prune

41. DOCKER COMPOSE
● Orchestrate containers
● YAML
● Single file: docker-compose.yaml
● Multi containers

42. DOCKER COMPOSE
docker-compose up -d

43. QUESTIONS ?
HERE WE GO

44. GET IN TOUCH
http://rafaeldutra.me
https://linkedin.com/in/rafaeldutra
@raffaeldutra
raffaeldutra@gmail.com
https://github.com/raffaeldutra
https://www.slideshare.net/raffaeldutra

45. THANK YOU
SEE YOU LATER