Do you know, being a Java dev, how to manage development environments with less effort? How to achieve continuous delivery using immutable server concept? How to manage set up a cloud within your workstation and many more? It might be the case you know, I bet it's much more easier to do with Docker.

1. Does it matter
for Java Dev?

2. ● just baked father
● SA at EPAM Systems
● primary skill is Java
● hands-on-coding with Groovy, Ruby
● trying to get in touch with Erlang/Elixir
● passionate about agile, clean code and devops
Izzet Mustafayev@EPAM Systems
@webdizz webdizz izzetmustafaiev
http://webdizz.name

3. Agenda
● what is docker?
● concepts
● how to
● dev env
● demo time
● what’s next
● summary
● q&a

5. Docker https://www.docker.com/
Docker - An open platform for
distributed applications for
developers and sysadmins.
● Develop an app with any language and any
toolchain
● Ship the “Dockerized” app and
dependencies anywhere
● Scale, move between data centers, update
with zero downtime and more

6. 1.6.2
released

7. Virtualization

8. Containerisation

9. Virtualization vs Containerisation

10. Container under the hood

11. Running containers

12. Concepts

13. Automation
● Build automation
● Provisioning automation
● Configuration automation
● Delivery Automation

14. ● Environment as a code
● Prohibition of ad-hoc changes
Immutability

15. ● Build
● Run
● Destroy
Disposability

16. Containerisation
● Container as deployment artifact
● Environment agnostic
● New version - new container
● All dependencies built in

18. Installation
# apt-get update
# wget -qO- https://get.docker.com/ | sh
Assumption: Ubuntu

19. Dockerfile
FROM phusion/baseimage:0.9.12
RUN apt-get -y update
&& apt-get -y install software-properties-common python-software-
properties
&& add-apt-repository ppa:webupd8team/java
&& apt-get clean
RUN apt-get -y update
&& echo oracle-java8-installer shared/accepted-oracle-license-v1-
select true | /usr/bin/debconf-set-selections
&& apt-get -y install oracle-java8-installer
&& apt-get clean
&& update-alternatives --display java
ENV JAVA_HOME /usr/lib/jvm/java-8-oracle
1
3
4
5

20. Command Line
$ docker build -t webdizz/baseimage-java8 .
$ docker images
$ docker run -d --name=java8
webdizz/baseimage-java8
$ docker ps
$ docker logs java8
$ docker stop java8
$ docker start java8
$ docker top java8

21. Docker Hub
● User accounts and Authentication
● Public namespaces
● Automated builds
● Registry for images with checksums
● Meta-data store (comments, stars, list public
repositories)

22. Official images

23. Official images for Java

24. Official images for Java...
● Clojure
● Tomcat
● Jruby
● Maven
● Glassfish
● Elasticsearch
● Jenkins
● SonarQube
● And more non-official

25. Dev Env

26. Perfect together

27. Routine is boring

28. Docker-compose is our way
● YAML syntax
● Configuration inclusion/inheritance
● Comprehensive CLI
● Bash completion

29. Docker-compose YAML
● image
● command
● links
● ports/expose
● volumes
● environment
● ...

30. Docker-compose CLI
● build
● up
● logs
● ps
● run
● start/stop
● scale
● ...

31. Demo Time

33. Service Discovery
● Configuration registry
● DNS
● Health checking
Tools
● Consul
● Etcd
● Zookeeper

34. Resource Management
● Scheduling
● Task execution
● Auto scale
Tools
● Mesos
● Flynn
● Fleet

35. Monitoring
● Failures and Outages are expected for
distributed apps
● Business aware metrics matters
Tools
● Dropwizard Metrics
● Netflix Servo
● cAdvisor

36. Logging
● Critical for operation
● Even more critical for distributed operation
● Remains critical with operation in Docker
Tools
● Elasticsearch Logstash Kibana
● Elasticsearch Fluentd Kibana

37. Continuous Delivery
● Container as deployable artifact
● New container for new application version
● Start/stop proper version of container for proper
version of application
Tools
● Ansible
● Docker Swarm

38. Summary
● Easy and fast building of images
● Easy to share in your team
● Easy to scale
● Easy to work with new technologies
● Of course learning curve
● Production like dev env*

39. ● http://docs.docker.com/
● https://hub.docker.com/
● http://www.fig.sh/
● https://mesosphere.com/
● http://www.consul.io/
● https://flynn.io
● https://github.com/coreos/fleet
● http://goo.gl/NEAfF2
● http://goo.gl/gfi94z
References

40. Q&A

41. Izzet Mustafayev@EPAM Systems
@webdizz webdizz izzetmustafaiev
http://webdizz.name