Docker is a platform for running and managing Linux containers that provides lightweight virtualization compared to traditional virtual machines. It allows applications to be packaged into standardized units called containers that have all their dependencies and can be run on any infrastructure that supports Docker. Docker improves deployment by allowing applications to be easily moved between development, testing, and production environments using self-contained images. As Docker grows in popularity, companies like Red Hat are integrating it into their middleware products and looking to distribute software via Docker containers and images.

1. Messaging with
Brought to you by Henryk Konsek

2. What is...
Engine for running and managing Linux
containers.

3. What are Linux containers?
Para-virtualized Linux instances.

4. Docker == LXC ?
● Docker used to be based on LXC (LinuX
Containers)
● but not anymore
● now Docker provides custom API over
cgroups and stuff

5. Why not regular virtualization?
● slooooooow
● gigantic images
● aggresive resource allocation
● bad API

6. Key concepts
● image (immutable, no state)
● container (has state)
● parent images (layers)

7. Docker awesomeness #1
Commands.

8. Docker awesomeness #2
+WAR
+Tomcat
+JRE
Ubuntu base
Layers.

9. Docker awesomeness #3
Repositories.

10. Dockerfiles
FROM ubuntu
EXPOSE 8080
RUN sudo apt-get install java
RUN wget http://maven.app.com/app.jar
ENTRYPOINT java -jar app.jar
“Recipes” for the new images.

11. Create new image in local repo
$ docker build -t app/app-1.0
$ docker run app/app-1.0

12. Docker == deployment 2.0
● create single image
● move it between environments (dev, QA,
production)

13. Deployment 2.0

14. Dockerize everything

15. Single box problem
You can’t deploy everything to the single box.

16. Single box problem solution
We need kinda proxy aggregating many Docker servers.

17. Docker aggregators
● libswarm
● flocker

18. Messaging and Docker

19. Docker routers
● the same role as OSGi bundles
● no VM transports
● communication usually via REST or JMS

20. “Bootified” & “Dockered” Camel
routers
● You need a bootstrap logic
● Spring Boot can scan classpath to find new
routes
● Fuse 6.2 Fabric8 comes with Spring Boot
Camel support

21. Docker future at Fabric8
Docker will become the recommended target
container.

22. Docker future at Red Hat
Docker images will be a standard way to
distribute middleware products.

23. Docker ecosystem future #1
(Red Hat’s) Project Atomic.

24. Docker ecosystem future #2
(Red Hat’s) Geard.

25. Thank you!