Demystifying Docker

Talk at JUG Saxony Day Dresden 2015-10-02 (http://www.jug-saxony-day.org)

Transcript

1. Demystifying Docker JUG Saxony Day 2015 Bernd Fischer
2. Who’s that guy? Passionate Java Developer (especially Spring) Agile and Devops infected Docker enthusiast berndfischer63@gmail.com @berndfischer63 JUG Saxony, Docker Meetup Dresden CTO MindApproach GmbH, Dresden bfischer@mindapproach.de
3. Who’s that guy? You build it you run it Werner Vogels, CTO Amazon, 2006 [Gra01]
4. Who’s that guy? Automate almost everything Continuous Delivery, 2010 [HuFa01]
5. Agenda Demystifying Docker ... What is Docker? Dockerize a Java Web Application in five steps Leassons learned
6. What is Docker
7. What is Docker? Container vs VM Virtual Machine Hypervisor / Host OS Physical Server Physical Server Host OS App A App B Libs Libs Guest OS Virtual Hardware / BIOS Docker Engine Container (Process) App A Libs Container App A Libs
8. What is Docker? Used Technologies Docker Libcontainer Namespaces Control Groups Storage Backends Layered/CoW Filesystems Linux Kernel Software Defined Networking
9. What is Docker? Images & Container read only writable empty after creation many containers can be created based on one image
10. What is Docker? Dockerhub Maven Central for Docker ...
11. What is Docker? System Architecture Docker Host (Linux) Docker Client Docker Daemon Container Images Container Container Images Images Socket RESTFul API Docker Client Windows Docker Client Mac OS V Docker Client
12. What is Docker? Docker Project Family • Docker-Engine (CLI + Daemon) • Docker-Machine • Docker-Compose • (Docker-Swarm) • (Docker-Distribution) • (Docker-Toolbox) • (Docker Notary based on TUF) • (Docker-Bench-Security)
13. What is Docker? Development Environment Virtual Machine (Linux) Images Container Mac OS X Windows /Users /Users Docker Client Docker Daemon
14. Dockerize a Java Web Application
15. Dockerize a Java Web App Starting Point Linux (Ubuntu 14.04.3-LTS) java -jar ... url username password JVM Demo-Application Spring Boot Web embedded Tomcat Database
16. Dockerize a Java Web App Starting Point DEMO
17. Dockerize a Java Web App MySql - local Installation
18. Dockerize a Java Web App MySql - local Installation
19. Dockerize a Java Web App MySql - local Installation
20. Dockerize a Java Web App MySql - Container
21. Dockerize a Java Web App MySql - Container Docker Machine docker-machine \ create \ --driver=virtualbox \ jsd2015
22. Dockerize a Java Web App MySql - Container DEMO
23. Dockerize a Java Web App MySql - Container Docker Compose # s01-docker-compose.yaml mysql: image: mysql:5.6.26 expose: - "3306" ports: - "3306:3306" environment: - MYSQL_ROOT_PASSWORD=9876 - MYSQL_USER=test - MYSQL_PASSWORD=1234 - MYSQL_DATABASE=test
24. Dockerize a Java Web App MySql - Container DEMO
25. Dockerize a Java Web App Java - Container # s02-docker-compose.yaml (snippet) app: image: java:8 ports: - "8080:8080" environment: - SPRING_PROFILES_ACTIVE=initdb working_dir: /opt/demo-helloworld-web links: - mysql:mysql entrypoint: [ "java", "-Djava.security.egd=file:/dev/./urandom", "-jar", "/opt/demo-helloworld-web/demo-helloworld-web-1.0-Local.jar" ] volumes: - ../../../target:/opt/demo-helloworld-web:ro
26. Dockerize a Java Web App Java - Container DEMO
27. Dockerize a Java Web App Unpacked Fat-Jar # maven -PunzipFatJar # unzip target/demo-helloworld-web-1.0-Local.jar \ -d target/app # s03-docker-compose.yaml (snippet) app: # ... volumes: - ../../../target/app/META-INF:/opt/.../META-INF:ro - ../../../target/classes/de:/opt/.../de:ro - ../../../target/app/lib:/opt/.../lib:ro - ../../../target/app/org:/opt/.../org:ro - ../../../target/classes/static:/opt/.../static:ro - ../../../target/classes/templates:/opt/.../templates:ro - ../../../target/classes/application.yml:/opt/.../application.yml:ro - ../../../target/classes/logback.xml:/opt/.../logback.xml:ro
28. Dockerize a Java Web App Unpacked Fat-Jar DEMO
29. Dockerize a Java Web App Docker Image by Foot # Dockerfile FROM java:8 MAINTAINER Bernd Fischer "bfischer@mindapproach.de" ENV MODIFIED_AT 2015-09-26_1845 COPY demo-helloworld-web.jar /opt/demo-helloworld-web/ # mvn -PbuildDockerWorkDir # copy Dockerfile and “Fat-Jar” in separate dir # should be called from project root dir docker build -t mapp/demo-helloworld-web04:latest \ -f $(pwd)/target/workdir-docker/Dockerfile \ $(pwd)/target/workdir-docker
30. Dockerize a Java Web App Docker Image by Foot # s04-docker-compose.yaml (snippet) app: image: mapp/demo-helloworld-web04:latest ports: - "8080:8080" environment: - SPRING_PROFILES_ACTIVE=initdb working_dir: /opt/demo-helloworld-web/ links: - mysql:mysql entrypoint: [ "java", "-Djava.security.egd=file:/dev/./urandom", "-jar","/opt/demo-helloworld-web/demo-helloworld-web.jar" ] _________
31. Dockerize a Java Web App Docker Image by Foot DEMO
32. Dockerize a Java Web App Docker Image by Maven # Maven (snippet) <plugin> <groupId>org.jolokia</groupId> <artifactId>docker-maven-plugin</artifactId> <version>0.13.4</version> <configuration> <dockerHost>${env.DOCKER_HOST}</dockerHost> <certPath>${env.DOCKER_CERT_PATH}</certPath> <images> <image> <name>mapp/demo-helloworld-web05</name> ... </image> </images> </configuration> ... </plugin>
33. Dockerize a Java Web App Docker Image by Maven # s05-docker-compose.yaml (snippet) app: image: mapp/demo-helloworld-web05:latest ports: - "8080:8080" environment: - SPRING_PROFILES_ACTIVE=initdb working_dir: /opt/demo-helloworld-web/ links: - mysql:mysql entrypoint: [ "java", "-Djava.security.egd=file:/dev/./urandom", "-jar","/opt/demo-helloworld-web/demo-helloworld-web.jar" ]
34. Dockerize a Java Web App Docker Image by Maven DEMO
35. Lessons learned
36. Lessons Learned Bereitstellung von Tools und Komponenten Verpacken und Deployen von Anwendungen Einfache Definition und Ausführung von (komplexen) Anwendungslandschaften (“Compositions”) Unit-/Modultests ...
37. One more thing ...
38. One more thing …. Private Docker Registries JFrog Artifactory (Docker support commercial only) Sonatype Nexus V3.0.0 CI-/CD-Pipelines Jenkins-Docker-Image Jenkins Workflow Engine, Docker Plugins, …
39. Questions … ?
40. Thanks for attention ...
41. Links ... • [Gra01] J. Gray, A Conversation with Werner Vogels: Learning form the Amazon technology platform, 2006, siehe: https://queue.acm.org/detail.cfm?id=1142065 • [HuFa01] Jez Humble, David Farley, Continuous Delivery: Reliable Software Releases Through Build, Test and Deployment Automation, 2010, Addison-Wesley • • [Do01] Docker Homepage https://www.docker.com/ • [Do02] Docker Hub https://hub.docker.com/ • [Do03] Docker Engine https://github.com/docker/docker • [Do04] Docker Machine https://github.com/docker/machine • [Do05] Docker Compose https://github.com/docker/compose • [Do06] Docker Toolbox https://github.com/docker/toolbox • • [Http01] Httpie Homepage http://httpie.org/ • • [RHu01] Docker-Maven-Plugin https://github.com/rhuss/docker-maven-plugin • [RHus02] Docker Maven Plugin Shootout: https://github.com/rhuss/shootout-docker-maven • • [Ma01] https://bitbucket.org/mindapproach/demo-helloworld-web