JavaCro'15 - Conquer the Internet of Things with Java and Docker - Johan Janssen, Pim Hazebroek
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This document discusses using Docker and Java on a Raspberry Pi. It provides instructions for installing Docker on a Raspberry Pi and creating Dockerfiles to run a Tomcat application container from a Java WAR file. It also discusses using Docker for continuous delivery by building a Docker image registry to version and distribute application containers.
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JavaCro'15 - Conquer the Internet of Things with Java and Docker - Johan Janssen, Pim Hazebroek
- 1. Johan Janssen (Info Support) @johanjanssen42 Pim Hazebroek (Info Support) @pimhazebroek
- 2. Internet of Things Docker and Java on a Raspberry PiDocker and Java on a Raspberry Pi Questions
- 4. Continuous Delivery Virtual machines Provisioning (Chef, Puppet, Vagrant …)Provisioning (Chef, Puppet, Vagrant …) Version control / infrastructure as code Isolation Updating and synchronizing environments
- 9. To enable continuous delivery Quickly provision environments Easy to roll forward SecuritySecurity For instance to run ‘untrusted’ applications like a Dropbox client Alternative for virtual machines On top of virtual machines
- 11. Disk space efficiency Memory efficiency SpeedSpeed Compatibility (run anywhere) Isolation Versioning Internet of Things (Raspberry Pi etc.)
- 12. Docker on the Raspberry Pi docker run -i –tdocker run -i –t resin/rpi-raspbian /bin/bash
- 13. Update repositories pacman –Syy Optional update al packages: pacman -Syupacman -Syu Install Docker pacman -S docker
- 14. FROM resin/rpi-raspbian RUN apt-get update RUN apt-get install -y openjdk-7-jre-headless wget RUN wget -O /tmp/tomcat8.tar.gz http://archive.apache.org/dist/tomcat/tomcat- 8/v8.0.9/bin/apache-tomcat-8.0.9.tar.gz8/v8.0.9/bin/apache-tomcat-8.0.9.tar.gz RUN (cd /opt && tar zxf /tmp/tomcat8.tar.gz) RUN (mv /opt/apache-tomcat* /opt/tomcat) ENV JAVA_HOME /usr/lib/jvm/java-1.7.0-openjdk-armhf RUN rm -rf /opt/tomcat/webapps/docs /opt/tomcat/webapps/examples /opt/tomcat/webapps/host-manager /opt/tomcat/webapps/manager EXPOSE 8080 CMD ["/opt/tomcat/bin/catalina.sh", "run"]
- 15. FROM resin/rpi-raspbian RUN apt-get install -y openjdk-7-jre- headless wgetheadless wget ENV JAVA_HOME /usr/lib/jvm/java-1.7.0- openjdk-armhf EXPOSE 8080 CMD ["/opt/tomcat/bin/catalina.sh", "run"]
- 18. Create the Dockerfiles Build the containers cd Tomcat (optional) docker build -t tomcat . (optional)docker build -t tomcat . (optional) cd .. (optional) cd TomcatApp docker build -t tomcatapp .
- 19. Start the container docker run -p 8080:8080 -d tomcatapp
- 23. Creating the Docker registry docker run -p 5000:5000 registry
- 24. Change container (using touch for instance) Commit docker.io commit 064f 192.168.56.31:5000/test-version-0.2192.168.56.31:5000/test-version-0.2 New containerid -> ff7e Push docker.io push 192.168.56.31:5000/test-version-0.2
- 25. Pull docker.io pull 192.168.56.31:5000/test-version-0.2 RunRun docker.io run -i -t ff7e /bin/bash
- 27. docker images -tree └─153bf43b408a 194.2 MB test-version-0.1:latest docker pull 192.168.56.31:5000/test-version-0.2docker pull 192.168.56.31:5000/test-version-0.2 ff7e110ebadd: Download complete 153bf43b408a: Download complete docker images -tree └─153bf43b408a 194.2 MB test-version-0.1:latest └─ff7e110ebadd 194.2 MB test-version-0.2:latest
- 28. GeneralBaseGeneralBaseGeneralBaseGeneralBase AppServerBaseAppServerBaseAppServerBaseAppServerBase JenkinsJenkinsJenkinsJenkins SonarSonarSonarSonar GitblitGitblitGitblitGitblit NexusNexusNexusNexus Environment DEnvironment DEnvironment DEnvironment D Environment TEnvironment TEnvironment TEnvironment T Environment AEnvironment AEnvironment AEnvironment A Environment PEnvironment PEnvironment PEnvironment P JenkinsDataContainerJenkinsDataContainerJenkinsDataContainerJenkinsDataContainer
- 29. # docker.io images --tree └─ 179.9 MB Tags: ubuntu:saucy └─253.6 MB └─741.8 MB Tags: GeneralBase:latest└─741.8 MB Tags: GeneralBase:latest └─763.6 MB Tags: AppServerBase:latest ├─763.6 MB Tags: EnvironmentP:latest └─865.6 MB Tags: Nexus:latest └─808.3 MB Tags: Gitblit:latest └─901.5 MB Tags: Sonar:latest └─805.4 MB Tags: Jenkins:latest
- 30. real 4m11.729sreal 4m11.729s user 0m3.329s sys 0m10.054s
- 31. Big potential market for Docker and Java Easy to useEasy to use Highly flexible and customizable