This document discusses Docker, a platform for developers and sysadmins to develop, ship, and run applications. It covers Docker concepts like images and containers, compares Docker to Vagrant, and provides examples of using Docker for local development environments, continuous integration testing, and automated deployment in a PaaS model.

1. DOCKER - WHAT’S THE
MATTER?
MICHAL SZCZUR

2. MICHAŁ
SZCZUR
SOFTWARE DEVELOPER AT PGS SOFTWARE
BASS GUITARIST, TRUMPETER, FOLK MUSIC ARTIST
@PARTIKUS

3. AGENDA
▸ Docker - what is it and how it works?
▸ Docker vs Vagrant
▸ How to use Docker at work?
▸ Some examples and stories

4. WHAT IS
DOCKER?

5. WHY SHOULD I USE
DOCKER?

6. WHAT PROBLEMS DOCKER SOLVES?
▸ „it works on my machine”
▸ Reduce build & deploy time
▸ No more configuration spaghetti - organized configuration
▸ Libs dependency hell
▸ Packed into containers

7. DOCKER IS A PLATFORM FOR
DEVELOPERS AND SYSADMINS
TO DEVELOP, SHIP, AND RUN
APPLICATIONS.
docs.docker.com

8. Symfony
Docker

9. CONCEPTS
DOCKER

12. DOCKER CONCEPTS
CONCEPTS
▸ Images
▸ read only
▸ Dockerfile
▸ like a makefile
▸ commands order and cache’ing
▸ extendable
▸ as a result new image given
▸ Containers - instances of running apps

13. DOCKER
TOOLS

14. TOOLS
DOCKER SOLUTIONS
▸ DOCKER HUB
▸ DOCKER TRUSTED REGISTRY
▸ TUTUM
▸ DOCKER UNIVERSAL CONTROL PLANE (BETA)

15. TOOLS
DOCKER TOOLBOX
▸ Docker Machine
▸ Docker Swarm
▸ Docker Compose
▸ Docker Registry
▸ Docker Engine
▸ Kitematic

16. SEMANTICS
DOCKER REGISTRY

17. SEMANTIC LIKE GIT
▸ commit
▸ pull
▸ push
▸ images
▸ …

18. BENEFITS

19. BENEFITS
▸ Movable - Java’s promise
▸ Lightweight
▸ Independence

20. DOCKER
VS
VAGRANT

22. CREATE AND CONFIGURE
LIGHTWEIGHT, REPRODUCIBLE,
AND PORTABLE DEVELOPMENT
ENVIRONMENTS.
vagrantup.com

23. DOCKER
VS
VAGRANT
VIRTUAL MACHINE

24. VAGRANT
==
DOCKER-COMPOSE

25. HOW TO USE
DOCKER AT
WORK?

26. LOCAL DEV ENV
DOCKER FOR DEVELOPMENT

27. TESTING
CONTINUOUS INTEGRATION

28. TESTING
CONTINUOUS INTEGRATION
▸ run tests per every commit
▸ don’t worry about cleaning up
▸ running parallel tests

29. CONTINUOUS
DELIVERY
AUTOMATED DEPLOYMENT

30. DOCKER IN PAAS
MODEL
PAAS

31. PAAS
▸ DOKKU
▸ DEIS
▸ FLYNN.IO

32. EXAMPLES

33. DOCKERFILE
DOCKER

34. FROM php:5.6-cli
MAINTAINER job@michalszczur.pl
RUN docker-php-ext-install iconv intl mysqli mysql gd mbstring pdo_mysql xsl
opcache
RUN curl -sS https://getcomposer.org/installer | php &&
mv composer.phar /usr/local/bin/composer &&
chmod +x /usr/local/bin/composer
EXPOSE 8080
COPY php.ini /usr/local/etc/php
ADD entrypoint.sh /entrypoint.sh
VOLUME /var/www
WORKDIR /var/www
ENTRYPOINT ["/bin/bash", "/entrypoint.sh"]

35. #!/bin/bash
# ENTRYPOINT
composer install --no-interaction --no-progress
php -S 0.0.0.0:8080 -t web

36. DOCKER-COMPOSE
DOCKER

37. hub:
image: selenium/hub
ports:
- "4444:4444"
environment:
- GRID_TIMEOUT=30000
firefox:
image: selenium/node-firefox
links:
- hub
chrome:
image: selenium/node-chrome
links:
- hub

38. docker-compose up -d

39. docker-compose scale chrome=5 firefox=5

40. QUESTIONS?

41. THANKS

42. LINKS
▸ http://michalszczur.pl
▸ http://docs.docker.com
▸ http://vagrantup.com
▸ http://bit.ly/1IENdHh
▸ https://www.heroku.com/
▸ http://progrium.viewdocs.io/dokku/