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Introduction to Docker

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Jian Wu
Jian Wu

Presented at Reading Group in Samsung SDSRA AI & Machine Learning Lab on Oct 21 2015

Technology
1 of 24
Jian Wu Reading Group AI & Machine Learning Lab Samsung SDSA Introduction to Docker
Virtual Machine v.s. Docker Container
Docker Vocabulary
Docker Architecture
Inside Docker Docker Daemon Libcontainer cgroups namespaces AUFS BTRFS dm-thinp VFS KernelUserSpace Linux Container resource(cpu, mem) limitation/isolation Environment( process/network) isolation Copy on Write File System
Inside Docker: AUFS File System Layer 2 Layer 1 Base Image Writable Layer Container Layer 1 Base Image Writable Layer Container Snapshot Container A Container B Writable Layer A Writable Layer B Layer 2 (e.g. Configuration) Layer 1 (e.g. MySQL) Base Image (e.g. Ubuntu) S h a r e d P r i v
Killer Apps with Docker Microservice Architecture Microservice is a loosely coupled service oriented architecture with bounded contexts
Killer Apps with Docker Continuous Deployment
Docker Community (Dockercon SF 2015)
Setup Local Docker Environment Install Docker on Ubuntu Linux: adminuser@adminuser-VirtualBox:~$ sudo apt-get install -y docker.io . . . . . . Setting up docker.io (1.5.0~dfsg1-1ubuntu2) ... Adding group `docker' (GID 132) ... Done. adminuser@adminuser-VirtualBox:~$ sudo service docker restart adminuser@adminuser-VirtualBox:~$ Check Local Docker Environment: adminuser@adminuser-VirtualBox:~$ sudo docker info Containers: 0 Images: 0 Storage Driver: aufs Root Dir: /var/lib/docker/aufs Backing Filesystem: extfs Dirs: 0 Execution Driver: native-0.2 Kernel Version: 3.19.0-20-generic Operating System: Ubuntu 15.04 CPUs: 1 Total Memory: 4.844 GiB Name: adminuser-VirtualBox ID: 7U44:LJUS:N4MT:LTUN:MRMW:JRG6:QURR:VEVF:BBJI:ISZQ:CISK:EGME WARNING: No swap limit support
Setup Local Docker Environment Pulling Docker Images from Docker Hub: adminuser@adminuser-VirtualBox:~$ sudo docker pull ubuntu:15.04 Pulling repository ubuntu 82554298ff4f: Download complete b8b73eaafc6e: Download complete 9f5beeea5d8a: Download complete 08ab09376d9a: Download complete Status: Downloaded newer image for ubuntu:15.04 adminuser@adminuser-VirtualBox:~/dockerprjs$ sudo docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE ubuntu 15.04 82554298ff4f 3 days ago 131.4 MB ubuntu vivid 82554298ff4f 3 days ago 131.4 MB ubuntu vivid-20150930 82554298ff4f 3 days ago 131.4 MB Start Docker Container using “run” command: adminuser@adminuser-VirtualBox:~$ sudo docker run -i -t ubuntu:15.04 /bin/bash root@6bff442a89ad:/# ls bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@6bff442a89ad:/# exit exit
Building Docker Image with Dockerfile Dockerfile is DSL to build Docker Image A sample Dockerfile building a Play Web Server with AngularJS Front-end: FROM ubuntu:15.04 MAINTAINER Jian Wu ENV REFRESHED_AT 2015-10-12 RUN DEBIAN_FRONTEND=noninteractive apt-get update -y RUN DEBIAN_FRONTEND=noninteractive apt-get install -y wget RUN DEBIAN_FRONTEND=noninteractive apt-get install -y openjdk-7-jdk RUN DEBIAN_FRONTEND=noninteractive apt-get install -y libjansi-java RUN java -version RUN wget www.scala-lang.org/files/archive/scala-2.10.5.deb RUN dpkg -i scala-2.10.5.deb RUN wget --referer='http://www.scala-sbt.org/0.13/tutorial/Installing-sbt-on-Linux.html' --local-encoding=UTF-8 https://dl.bintray.com/sbt/debian/sbt-0.13.8.deb RUN dpkg -i sbt-0.13.8.deb EXPOSE 9000 ADD spark-dataframe-report-server /dfreportserver WORKDIR /dfreportserver RUN sbt clean compile CMD sbt run
Building Docker Image using “build” command: adminuser@adminuser-VirtualBox:~/dockerprjs$ sudo docker build -t dfreportserverv1 . . . . . . . [success] Total time: 194 s, completed Oct 12, 2015 10:34:34 PM ---> f90b60f7cff6 Removing intermediate container 76a43d7db31a Step 16 : CMD sbt run ---> Running in cfcc978b5781 ---> 9101373c8e80 Removing intermediate container cfcc978b5781 Successfully built 9101373c8e80 adminuser@adminuser-VirtualBox:~/dockerprjs$ sudo docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE dfreportserverv1 latest 9101373c8e80 56 seconds ago 836.9 MB ubuntu vivid-20150930 82554298ff4f 4 days ago 131.4 MB ubuntu 15.04 82554298ff4f 4 days ago 131.4 MB ubuntu vivid 82554298ff4f 4 days ago 131.4 MB Building Docker Image with Dockerfile
Running Docker Container with Locally Built Image Start Docker Container using “run” command: adminuser@adminuser-VirtualBox:~$ sudo docker run -it -p 9000:9000 dfreportserverv1 [info] Loading project definition from /dfreportserver/project [info] Set current project to spark-dataframe-report-server (in build file:/dfreportserver/) SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/root/.ivy2/cache/ch.qos.logback/logback-classic/jars/logback-c lassic-1.1.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/root/.ivy2/cache/org.slf4j/slf4j-log4j12/jars/slf4j-log4j12-1. 7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder] --- (Running the application, auto-reloading is enabled) --- [info] play - Listening for HTTP on /0:0:0:0:0:0:0:0:9000 (Server started, use Ctrl+D to stop and go back to the console...)
Docker Volume Docker Volume let sys admin mount a directory from the Docker daemon’s host into a container as a data volume
Docker Networking Bridge Mode (Default): “docker0” virtual interface is created as “Ethernet Bridge” to routing network traffic between containers and Docker Host Host Mode: Container directly using Host Network
Docker Registry
Docker Hub (Dockercon SF 2015) Major features: -- Public and Private Docker repositories -- Official Repositories -- Collaborators, Organizations and Groups -- Automated builds -- Webhooks Docker Hub (hub.docker.com) is a cloud registry service for sharing application and automating workflows.
Docker Hub Architecture (v2) (Dockercon SF 2015)
Docker Compose (Dockercon SF 2015)
Simple Docker Cluster: Docker Swarm
Advanced Docker Cluster: Kubernetes
Advanced Docker Cluster: Mesos
AWS EC2 Container Service with Docker AWS EC2 Container Registry

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Introduction to Docker

  • 1. Jian Wu Reading Group AI & Machine Learning Lab Samsung SDSA Introduction to Docker
  • 2. Virtual Machine v.s. Docker Container
  • 5. Inside Docker Docker Daemon Libcontainer cgroups namespaces AUFS BTRFS dm-thinp VFS KernelUserSpace Linux Container resource(cpu, mem) limitation/isolation Environment( process/network) isolation Copy on Write File System
  • 6. Inside Docker: AUFS File System Layer 2 Layer 1 Base Image Writable Layer Container Layer 1 Base Image Writable Layer Container Snapshot Container A Container B Writable Layer A Writable Layer B Layer 2 (e.g. Configuration) Layer 1 (e.g. MySQL) Base Image (e.g. Ubuntu) S h a r e d P r i v
  • 7. Killer Apps with Docker Microservice Architecture Microservice is a loosely coupled service oriented architecture with bounded contexts
  • 8. Killer Apps with Docker Continuous Deployment
  • 10. Setup Local Docker Environment Install Docker on Ubuntu Linux: adminuser@adminuser-VirtualBox:~$ sudo apt-get install -y docker.io . . . . . . Setting up docker.io (1.5.0~dfsg1-1ubuntu2) ... Adding group `docker' (GID 132) ... Done. adminuser@adminuser-VirtualBox:~$ sudo service docker restart adminuser@adminuser-VirtualBox:~$ Check Local Docker Environment: adminuser@adminuser-VirtualBox:~$ sudo docker info Containers: 0 Images: 0 Storage Driver: aufs Root Dir: /var/lib/docker/aufs Backing Filesystem: extfs Dirs: 0 Execution Driver: native-0.2 Kernel Version: 3.19.0-20-generic Operating System: Ubuntu 15.04 CPUs: 1 Total Memory: 4.844 GiB Name: adminuser-VirtualBox ID: 7U44:LJUS:N4MT:LTUN:MRMW:JRG6:QURR:VEVF:BBJI:ISZQ:CISK:EGME WARNING: No swap limit support
  • 11. Setup Local Docker Environment Pulling Docker Images from Docker Hub: adminuser@adminuser-VirtualBox:~$ sudo docker pull ubuntu:15.04 Pulling repository ubuntu 82554298ff4f: Download complete b8b73eaafc6e: Download complete 9f5beeea5d8a: Download complete 08ab09376d9a: Download complete Status: Downloaded newer image for ubuntu:15.04 adminuser@adminuser-VirtualBox:~/dockerprjs$ sudo docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE ubuntu 15.04 82554298ff4f 3 days ago 131.4 MB ubuntu vivid 82554298ff4f 3 days ago 131.4 MB ubuntu vivid-20150930 82554298ff4f 3 days ago 131.4 MB Start Docker Container using “run” command: adminuser@adminuser-VirtualBox:~$ sudo docker run -i -t ubuntu:15.04 /bin/bash root@6bff442a89ad:/# ls bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var root@6bff442a89ad:/# exit exit
  • 12. Building Docker Image with Dockerfile Dockerfile is DSL to build Docker Image A sample Dockerfile building a Play Web Server with AngularJS Front-end: FROM ubuntu:15.04 MAINTAINER Jian Wu ENV REFRESHED_AT 2015-10-12 RUN DEBIAN_FRONTEND=noninteractive apt-get update -y RUN DEBIAN_FRONTEND=noninteractive apt-get install -y wget RUN DEBIAN_FRONTEND=noninteractive apt-get install -y openjdk-7-jdk RUN DEBIAN_FRONTEND=noninteractive apt-get install -y libjansi-java RUN java -version RUN wget www.scala-lang.org/files/archive/scala-2.10.5.deb RUN dpkg -i scala-2.10.5.deb RUN wget --referer='http://www.scala-sbt.org/0.13/tutorial/Installing-sbt-on-Linux.html' --local-encoding=UTF-8 https://dl.bintray.com/sbt/debian/sbt-0.13.8.deb RUN dpkg -i sbt-0.13.8.deb EXPOSE 9000 ADD spark-dataframe-report-server /dfreportserver WORKDIR /dfreportserver RUN sbt clean compile CMD sbt run
  • 13. Building Docker Image using “build” command: adminuser@adminuser-VirtualBox:~/dockerprjs$ sudo docker build -t dfreportserverv1 . . . . . . . [success] Total time: 194 s, completed Oct 12, 2015 10:34:34 PM ---> f90b60f7cff6 Removing intermediate container 76a43d7db31a Step 16 : CMD sbt run ---> Running in cfcc978b5781 ---> 9101373c8e80 Removing intermediate container cfcc978b5781 Successfully built 9101373c8e80 adminuser@adminuser-VirtualBox:~/dockerprjs$ sudo docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE dfreportserverv1 latest 9101373c8e80 56 seconds ago 836.9 MB ubuntu vivid-20150930 82554298ff4f 4 days ago 131.4 MB ubuntu 15.04 82554298ff4f 4 days ago 131.4 MB ubuntu vivid 82554298ff4f 4 days ago 131.4 MB Building Docker Image with Dockerfile
  • 14. Running Docker Container with Locally Built Image Start Docker Container using “run” command: adminuser@adminuser-VirtualBox:~$ sudo docker run -it -p 9000:9000 dfreportserverv1 [info] Loading project definition from /dfreportserver/project [info] Set current project to spark-dataframe-report-server (in build file:/dfreportserver/) SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/root/.ivy2/cache/ch.qos.logback/logback-classic/jars/logback-c lassic-1.1.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/root/.ivy2/cache/org.slf4j/slf4j-log4j12/jars/slf4j-log4j12-1. 7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder] --- (Running the application, auto-reloading is enabled) --- [info] play - Listening for HTTP on /0:0:0:0:0:0:0:0:9000 (Server started, use Ctrl+D to stop and go back to the console...)
  • 15. Docker Volume Docker Volume let sys admin mount a directory from the Docker daemon’s host into a container as a data volume
  • 16. Docker Networking Bridge Mode (Default): “docker0” virtual interface is created as “Ethernet Bridge” to routing network traffic between containers and Docker Host Host Mode: Container directly using Host Network
  • 18. Docker Hub (Dockercon SF 2015) Major features: -- Public and Private Docker repositories -- Official Repositories -- Collaborators, Organizations and Groups -- Automated builds -- Webhooks Docker Hub (hub.docker.com) is a cloud registry service for sharing application and automating workflows.
  • 19. Docker Hub Architecture (v2) (Dockercon SF 2015)
  • 21. Simple Docker Cluster: Docker Swarm
  • 24. AWS EC2 Container Service with Docker AWS EC2 Container Registry