The hype around Docker is big, but does Docker live up to it? What is that this new tool excites developers and operators in unison? In this talk I will show what makes Docker different and what the vision behind it is. I will also give some practical insights from using Docker in development and production and demonstrate why I started to “dockerize" everything.

1. Dockerize Everything
Thomas Einwaller, troii Software
@tompson

3. products

4. products
technologies

6. 2008

7. 2008
2013

14. Number of Processes
~$ ps ax | wc -l
283
~$ docker run ubuntu ps ax
PID TTY STAT TIME COMMAND
1 ? Rs 0:00 ps ax

16. code
runtime
libraries
OS
container
what is in a container?

17. image layers

18. ubuntu
nginx java
tomcat
App A App B
wordpress website X
“inheritance”

19. one process per container
tomcat mysql
war, .properties
link
container A container B

20. immutable

21. ship the whole environment

22. DevOps

23. How to get started?

24. Docker Toolbox

28. Search and Run an Image
~$ docker search -s 10 wordpress
NAME DESCRIPTION STARS OFFICIAL
wordpress The WordPress rich content management syst... 323 [OK]
tutum/wordpress Wordpress Docker image - listens in port 8... 40
...
~$ docker run wordpress
Unable to find image 'wordpress:latest' locally
latest: Pulling from wordpress
60fa28093d2e: Pull complete
a8f83d6d9aa9: Pull complete
d0ca8f539db8: Pull complete
...

29. How to build my own?

30. Custom Container
~$ docker run -it ubuntu /bin/bash
root:/#
root:/# apt-get install -y mysql-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
…

31. Commit Container
~$ docker ps
CONTAINER ID IMAGE COMMAND NAMES
e5a0e59fd3fd ubuntu:latest "/bin/bash" prickly_nobel
~$ docker commit prickly_nobel tom/mysql
CONTAINER ID IMAGE COMMAND NAMES
e5a0e59fd3fd ubuntu:latest "/bin/bash" prickly_nobel
~$ docker images
REPOSITORY TAG IMAGE ID VIRTUAL SIZE
tom/mysql latest 86a1fcd53530 512.1 MB
~$ docker run tom/mysql
...

32. Dockerfile
FROM ubuntu
MAINTAINER Thomas Einwaller, tom@troii.com
RUN apt-get update && apt-get -y install apache2
ENV APACHE_RUN_USER www-data
ENV APACHE_RUN_GROUP www-data
ENV APACHE_LOG_DIR /var/log/apache2
ENV APACHE_LOCK_DIR /var/lock/apache2
ENV APACHE_PID_FILE /var/run/apache2.pid
RUN mkdir /var/lock/apache2
EXPOSE 80
CMD ["/usr/sbin/apache2", "-D", "FOREGROUND"]

33. Docker build
~$ docker build -t tom/apache2 .
Sending build context to Docker daemon 2.048 kB
Sending build context to Docker daemon
Step 0 : FROM ubuntu
---> bdb87369f343
Step 1 : MAINTAINER Thomas Einwaller, tom@troii.com
---> Using cache
---> adcf06d4a78f
Step 2 : RUN apt-get update && apt-get -y install apache2
---> Using cache
---> 5aee61ee1c84
...
Step 9 : EXPOSE 80
---> Using cache
---> ac985c02bfd6
Step 10 : CMD /usr/sbin/apache2 -D FOREGROUND
---> Running in 0a822e00e190
---> 89ac6eef066c
Successfully built 89ac6eef066c

34. Docker history
~$ docker history tom/apache2
IMAGE CREATED CREATED BY SIZE
a6b064aec848 2 minutes ago /bin/sh -c #(nop) CMD ["/usr/sbin/apache2" "- 0 B
dc0e02dc4d11 2 minutes ago /bin/sh -c #(nop) EXPOSE 80/tcp 0 B
1bc593d23431 2 minutes ago /bin/sh -c mkdir /var/lock/apache2 0 B
afdda46774c6 2 minutes ago /bin/sh -c #(nop) ENV APACHE_PID_FILE=/var/ru 0 B
7f1a112bfd2e 2 minutes ago /bin/sh -c #(nop) ENV APACHE_LOCK_DIR=/var/lo 0 B
8a95fc52c646 2 minutes ago /bin/sh -c #(nop) ENV APACHE_LOG_DIR=/var/log 0
Ba32a610ccb8 2 minutes ago /bin/sh -c #(nop) ENV APACHE_RUN_GROUP=www-da 0 B
8083f7e42d6d 2 minutes ago /bin/sh -c #(nop) ENV APACHE_RUN_USER=www-dat 0 B
8cbd4df21d8b 2 minutes ago /bin/sh -c apt-get update && apt-get -y insta 30.63 MB
ddfbce728239 2 minutes ago /bin/sh -c #(nop) MAINTAINER Thomas Einwaller 0 B
bdb87369f343 5 weeks ago /bin/sh -c #(nop) CMD [/bin/zsh] 0 B
....

36. Docker push
~$ docker push tom/apache2
Sending image list
Pushing repository tom/apache2 (1 tags)
Image 511136ea3c5a already pushed, skipping
Image 9fec74352904 already pushed, skipping
Image d0955f21bf24 already pushed, skipping
...

37. Docker push
~$ docker push tom/apache2
Sending image list
Pushing repository tom/apache2 (1 tags)
Image 511136ea3c5a already pushed, skipping
Image 9fec74352904 already pushed, skipping
Image d0955f21bf24 already pushed, skipping
...
and pull
~$ docker pull tom/apache2
Unable to find image 'tom/apache2:latest' locally
latest: Pulling from tom/apache2
60fa28093d2e: Pull complete
a8f83d6d9aa9: Pull complete
d0ca8f539db8: Pull complete
...

38. How to use it?

39. git
repository
artifact
repository
Development
Environment
Continuous
Integration
Source
Artifact
(.war, .jar, ...)
Test/Prod
Environment
build / deployment pipeline before docker

40. build / deployment pipeline with docker
git
repository
artifact
repository
docker
repository
Development
Environment
Continuous
Integration
Source
Artifact
(.war, .jar, ...)
Continuous
Integration
Test/Prod
Environment
Docker
Image

41. Development Environment
~$ docker run -v /Users/tom/website:/website nginx
…
~$ docker run -v /Users/tom/code:/code node
…

42. or

43. Backup Tools
~$ docker run --volumes-from=nexus_data
-e SOURCE=/usr/local/sonatype-work
-e TARGET=s3://s3-eu-west-1.amazonaws.com/nexus-backup/
-e TARGET_USER=$AWSACCESSKEYID
-e TARGET_PASS=$AWSSECRETACCESSKEY
duply
~$ docker run --link mysql:db
-e BUCKET_NAME=mysql-backup
-e AWSACCESSKEYID=$AWSACCESSKEYID
-e AWSSECRETACCESSKEY=$AWSSECRETACCESSKEY
-e DBNAMES=test
-e USERNAME=user
-e PASSWORD=password
automysqlbackup

44. Backup Tools
~$ docker run -v /home/tom/development/src:/src groovy //.gvm/groovy/
current/bin/groovy /src/script.groovy
~$

45. dexec

46. dexec

47. Docker machine
~$ docker-machine create --driver virtualbox dev
INFO[0001] Downloading boot2docker.iso to /home/tom/.docker/machine/
INFO[0011] Creating SSH key...
INFO[0012] Creating VirtualBox VM...
INFO[0019] Starting VirtualBox VM...
...
~$ docker-machine ls
NAME ACTIVE DRIVER STATE URL
dev * virtualbox Running tcp://192.168.99.103:2376
staging digitalocean Running tcp://104.236.50.118:2376

48. Docker compose
nginx:
image: nginx:1.9.6
ports:
- "80:80"
links:
- webapp
webapp:
build: .
links:
- db
db:
image: postgres

49. docker swarm

50. docker networking

52. https://github.com/docker/dockercraft

53. https://github.com/docker/dockercraft

55. conclusion
• set up development environments (database, languages, …)
• move packages to test environments (no more “works on my machine”)
• move the SAME package to production (server, cloud …)

56. timr.com discount code ‘TOPCONF’ -20 %
@tompson
tom@troii.com