Docker. Does it matter for Java developer ?
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The document is a presentation about Docker, detailing its role as an open platform for developers to create, ship, and manage distributed applications using containerization. It covers fundamental concepts such as automation, immutability, and environment management, along with practical examples of Docker commands and Docker Compose for managing services. The conclusion highlights the easy scalability and fast deployment capabilities of Docker, encouraging further exploration of the tool.
Docker. Does it matter for Java developer ?
- 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
- 10. Container under the hood
- 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
- 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