This document compares classic app development and deployment to containerized apps. It discusses using containers and Docker to package apps and their dependencies. It shows how containers can be defined, built, and orchestrated. Container deployment to different environments like integration, staging, and production is described. Usage scenarios like continuous integration servers are presented. Challenges with the new container-based approach are also acknowledged.

2. Agenda
• Classic Apps vs. Containerized Apps
• Architecture for App development & deployment

3. Classic (Web)
Application

4. Web Application
Dependencies
Data-
Base
Web-
Server
Packages
Libraries

5. Web Application
Dependencies
Data-
Base
Web-
Server
Packages
Libraries
Devs Ops

6. Web Application
Dependencies
Data-
Base
Web-
Server
Packages
Libraries
Devs Ops
1.1.0 0.9
⚡

7. Containerized
(Web) Application

8. Web Application
Docker Host
PHP DataBase
Webserver Mail
Ops
Devs

9. Container Specification
a.k.a. Dockerfile

10. FROM nginx:1.7
MAINTAINER punkt.de
COPY nginx.conf /etc/nginx/nginx.conf
COPY default.conf /etc/nginx/conf.d/default.conf

11. Container Orchestration
a.k.a. docker-compose.yml

12. app:
build: Configuration/Docker/App
environment:
- FLOW_CONTEXT=Production/Docker
volumes:
- /var/www/app/Web
- /var/www/app/Packages
data:
image: php:5.6-fpm
command: chown -Rf www-data:www-data /var/www/app/Data && echo "Data started"
volumes:
- /var/www/app/Data
- /var/lib/mysql
web:
build: Configuration/Docker/Web
db:
image: mariadb:10.0
environment:
MYSQL_ROOT_PASSWORD: supersecret
mail:
image: mailhog/mailhog:latest

13. Deployment
a.k.a. ship Container

14. staging | integration | production
local development
Webserver
docker build
Docker
Registry
docker push
Docker Host
Webserver
docker
pull & up

15. Usage Scenarios

16. Integration Server
Web Application
Docker Host
PHP
master
DataBase
Webserver Mail
Web Application
PHP
devel
DataBase
Webserver Mail
Web Application
PHP
feature
DataBase
Webserver Mail
Proxy
master.punktdeneos.jenkins.punkt.de devel.punktdeneos.jenkins.punkt.de feature.punktdeneos.jenkins.punkt.de

17. Staging
Web Application
Docker Host
PHP
v 2.2
DataBase
Webserver Mail
Production
Web Application
Docker Host
PHP
v 2.1
DataBase
Webserver Mail
demo.punkt.de www.punkt.de

18. Devs
Ops
Docker
Registry
DataBaseWebserver Mail
docker push
Application 1 Application 2 Application 3
docker push

19. The Dark Side

20. „Under Construction“
• Stumble upon quite a few bugs
• Not many best-practices yet
• New tools almost every day
• Too many „Don’t use in production!“s

21. Further Readings