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Docker presentation | Paris Docker Meetup

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- The document summarizes a meetup on Docker held in Paris on February 10, 2013. It provides an introduction to Docker including its origins at dotCloud, timeline of development, and basic functionality using Linux containers, control groups, and AUFS. - The presentation covers installing Docker, basic commands like running "hello world" examples, managing containers vs images, and demonstrates a simple app deployment using Docker for local development and pushing changes to production. - Questions from attendees are solicited at the end to discuss Docker further.

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Docker Paris meetup #1 – 10/02/2013 Victor Vieux, dotCloud Inc. @vieux
Outline •  Intro to Docker •  Installing Docker •  Basic commands •  Demo: Simple deployment •  Questions
Quick survey •  How many people have heard of Docker before this Meetup ? •  How many people have tried Docker ? •  How many people are using Docker in production ?
Introduction to Docker
Origins of Docker •  Docker is a rewrite of similar code that currently powers the dotCloud PaaS •  Original version written in Python (like dotCloud PaaS), now written in Go •  It’s a young project (~6 months), but with a huge community.
Docker Timeline •  January 2013 Docker started as an internal project inside of dotCloud •  March 21, 2013 Solomon gives Docker lightning talk a PyCon US •  March 27, 2013 Docker 0.1 released to Public •  September 4, 2013 Docker merged into Openstack for the Havana release •  September 19, 2013 Partnership with Red Hat around OpenShift •  September 27, 2013 Docker 0.6.3 released
In the first 6 months •  6000+ Github stars •  150+ Contributors •  50,000+ docker index pull •  100’s of projects built on top of Docker – UIs (DockerUI, Shipyard, Dockland…) – Open Source PaaS (DEIS, Flynn, Dokku…) – Continuous Deployment (Strider…) •  1700’s Dockerized applications on Github
What is Docker ? “Docker is an open-source engine to easily create lightweight, portable, self-sufficient containers from any application. The same container that a developer builds and test on a laptop can run at scale, in production, on VMs, OpenStack cluster, public clouds and more.”
How does Docker work ? •  LinuX Containers (LXC) •  Control Groups & Namespaces •  AUFS •  Client – Server with an HTTP API
LinuX Containers (LCX) •  Let’s your run a Linux system within another Linux system •  A container is a group of processes on a Linux box, put together is an isolated environment •  From the inside, it looks like a VM •  From the outside, it looks like normal processes •  “chroot on steroids”
Why Containers? •  Speed: Boots in seconds •  Footprint: 100-1000 containers on one machine. Small disk requirements
Containers vs. VMs
Control Groups & Namespaces Linux kernel feature to limit, account and isolate resource usage, such as: – CPU – Memory – Disk I/O
AUFS   •  File system that implements union mount.       •  Supports Copy On Write (COW):       # mount –t aufs –o br=/files1:/files2 none /files       # mount –t aufs –o br=/tmp=rw:/bin=ro none /files    
Installing Docker
Requirements •  Linux Kernel 3.8 or above •  AUFS •  LXC •  64-bit
Installations •  Ubuntu Linux •  Binaries •  Using Vagrant More on: http://docs.docker.io/en/latest/installation
Installation: Ubuntu Linux •  AUFS support $> sudo apt-get update $> sudo apt-get intall linux-image-extra-`uname –r` •  Add Docker repository $> sudo sh –c “curl https://get.docker.io/gpg | apt-key add -” $> sudo sh –c “echo deb http://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list” •  Install $> sudo apt-get update $> sudo apt-get install lxc-docker
Installation: Binaries •  Get the docker binary $> wget –output-document=docker https://get.docker.io/builds/ Linux/x86_64/docker-latest $> chmod +x docker •  Run the docker daemon $> sudo ./docker –d & •  Use your own system startup script  
Installation: Vagrant •  Clone the Docker repository $> git clone https://github.com/dotcloud/docker.git •  Startup the vagrant image $> vagrant up   •  SSH into the image $> vagrant ssh •  Docker client works on Mac
Basic  commands  
Classic: hello world •  Get one base image (ubuntu, centos, busybox,…) $> docker pull ubuntu •  List images on your system $> docker images     •  Print hello world $> docker run ubuntu:12.10 echo “hello world”  
Detached mode •  Run  in  Docker  using  the  detach  flag  (-­‐d)   $> docker run –d ubuntu sh –c “while true; do echo hello world; sleep 1; done” •  Get  container’s  id   $> docker ps •  A:ach  to  the  container   $> docker attach <container_id>   •  Stop/Start/Restart  the  container   $> docker stop <container_id>  
Containers vs Images •  Remove a file from an image $> docker run busybox rm /etc/passwd •  The file is still there ?? $> docker run busybox cat /etc/passwd •  Commit the newly created to an image $> docker ps –n=2 #get the container’s id $> docker commit <id> vieux/broken-busybox   •  The file is gone $> docker run vieux/broken-busybox cat /etc/passwd
Public Index & Network •  Pull an apache image from the public index $> docker search apache $> docker pull creack/apache2 •  Run the image and check the ports $> docker run –d creack/apache2 $> docker ps •  Expose public ports $> docker run –d –p 8888:80 –p 4444:443 creack/apache2 $> docker ps  
Creating your 1st app: the interactive way •  Using docker in interactive mode $> docker run –i –t ubuntu bash root@82c63ee50c3d:/# root@82c63ee50c3d:/# apt-get update […] root@82c63ee50c3d:/# apt-get install memcached […] root@82c63ee50c3d:/# exit •  Commit the image $> docker commit `docker ps –q –l` vieux/memcached •  Start the image $> docker run –d –p 11211 –u daemon vieux/memcached memcached
Creating your 1st app: the boring way •  Multiple run / commit $> docker run ubuntu apt-get update $> $ID=(docker commit `docker ps –q –l`) $> docker run $ID apt-get install memcached $> docker commit `docker ps –q –l vieux/memcached •  Define default configuration at commit $> docker commit –run=‘{“Entrypoint”: [“memcached”]}’ […] •  Start the image $> docker run –d –p 11211 –u daemon vieux/memcached
Creating your 1st app: the scripted way •  Write a Dockerfile # Memcached FROM ubuntu MAINTAINER Victor Vieux <victor@dotcloud.com> RUN apt-get update RUN apt-get install –y memcached ENTRYPOINT [“memcached”] USER daemon EXPOSE 11211 •  Buid the image $> docker build –t=vieux/memcached . •  Start the image $> docker run –d vieux/memcached memcached
Volumes and bind mounts •  Put your persistent data in a volume $> $ID=(docker run –d –v /var/lib/mysql vieux/mysql) •  So you can re use it in another container $> docker run –d –volumes-from=$ID vieux/mysql   •  Bind mounts $> docker run –d –v /home/vv:/home <image> •  Supports read only / read write $> docker run –d –v host/path:container/path:rw <image>
Other commands •  docker cp #copy a file from container to host •  docker diff #print container changes •  docker top #display running processes inside a container •  docker rm/rmi #delete container/image •  docker wait #wait until container stop and print exit code More on: http://docs.docker.io/en/latest/commandline/cli
Demo: Simple deployment
Local development •  App running in prod http://ks3100989.kimsufi.com:8080/ •  Build local  $> docker build –t=gcm . •  Test local $> docker run –p 49200:8080 gcm  http://localhost:49200 •  Change some files •  Rebuild & test $> docker build –t=gcm . $> docker run –p 49200:8080 gcm
Push to prod •  Tag image in order to push it $> docker tag gcm ks3100989.kimsufi.com:5000/gcm •  Push image to local registry $> docker push ks3100989.kimsufi.com:5000/gcm •  On production server, download image $> docker pull ks3100989.kimsufi.com:5000/gcm •  Restart the container $> docker stop <container_id> $> docker run –d –p 8080:8080 <image>
Questions ?
Thank you! @vieux

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Docker presentation | Paris Docker Meetup

  • 1. Docker Paris meetup #1 – 10/02/2013 Victor Vieux, dotCloud Inc. @vieux
  • 2. Outline •  Intro to Docker •  Installing Docker •  Basic commands •  Demo: Simple deployment •  Questions
  • 3. Quick survey •  How many people have heard of Docker before this Meetup ? •  How many people have tried Docker ? •  How many people are using Docker in production ?
  • 5. Origins of Docker •  Docker is a rewrite of similar code that currently powers the dotCloud PaaS •  Original version written in Python (like dotCloud PaaS), now written in Go •  It’s a young project (~6 months), but with a huge community.
  • 6. Docker Timeline •  January 2013 Docker started as an internal project inside of dotCloud •  March 21, 2013 Solomon gives Docker lightning talk a PyCon US •  March 27, 2013 Docker 0.1 released to Public •  September 4, 2013 Docker merged into Openstack for the Havana release •  September 19, 2013 Partnership with Red Hat around OpenShift •  September 27, 2013 Docker 0.6.3 released
  • 7. In the first 6 months •  6000+ Github stars •  150+ Contributors •  50,000+ docker index pull •  100’s of projects built on top of Docker – UIs (DockerUI, Shipyard, Dockland…) – Open Source PaaS (DEIS, Flynn, Dokku…) – Continuous Deployment (Strider…) •  1700’s Dockerized applications on Github
  • 8. What is Docker ? “Docker is an open-source engine to easily create lightweight, portable, self-sufficient containers from any application. The same container that a developer builds and test on a laptop can run at scale, in production, on VMs, OpenStack cluster, public clouds and more.”
  • 9. How does Docker work ? •  LinuX Containers (LXC) •  Control Groups & Namespaces •  AUFS •  Client – Server with an HTTP API
  • 10. LinuX Containers (LCX) •  Let’s your run a Linux system within another Linux system •  A container is a group of processes on a Linux box, put together is an isolated environment •  From the inside, it looks like a VM •  From the outside, it looks like normal processes •  “chroot on steroids”
  • 11. Why Containers? •  Speed: Boots in seconds •  Footprint: 100-1000 containers on one machine. Small disk requirements
  • 13. Control Groups & Namespaces Linux kernel feature to limit, account and isolate resource usage, such as: – CPU – Memory – Disk I/O
  • 14. AUFS   •  File system that implements union mount.       •  Supports Copy On Write (COW):       # mount –t aufs –o br=/files1:/files2 none /files       # mount –t aufs –o br=/tmp=rw:/bin=ro none /files    
  • 16. Requirements •  Linux Kernel 3.8 or above •  AUFS •  LXC •  64-bit
  • 17. Installations •  Ubuntu Linux •  Binaries •  Using Vagrant More on: http://docs.docker.io/en/latest/installation
  • 18. Installation: Ubuntu Linux •  AUFS support $> sudo apt-get update $> sudo apt-get intall linux-image-extra-`uname –r` •  Add Docker repository $> sudo sh –c “curl https://get.docker.io/gpg | apt-key add -” $> sudo sh –c “echo deb http://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list” •  Install $> sudo apt-get update $> sudo apt-get install lxc-docker
  • 19. Installation: Binaries •  Get the docker binary $> wget –output-document=docker https://get.docker.io/builds/ Linux/x86_64/docker-latest $> chmod +x docker •  Run the docker daemon $> sudo ./docker –d & •  Use your own system startup script  
  • 20. Installation: Vagrant •  Clone the Docker repository $> git clone https://github.com/dotcloud/docker.git •  Startup the vagrant image $> vagrant up   •  SSH into the image $> vagrant ssh •  Docker client works on Mac
  • 22. Classic: hello world •  Get one base image (ubuntu, centos, busybox,…) $> docker pull ubuntu •  List images on your system $> docker images     •  Print hello world $> docker run ubuntu:12.10 echo “hello world”  
  • 23. Detached mode •  Run  in  Docker  using  the  detach  flag  (-­‐d)   $> docker run –d ubuntu sh –c “while true; do echo hello world; sleep 1; done” •  Get  container’s  id   $> docker ps •  A:ach  to  the  container   $> docker attach <container_id>   •  Stop/Start/Restart  the  container   $> docker stop <container_id>  
  • 24. Containers vs Images •  Remove a file from an image $> docker run busybox rm /etc/passwd •  The file is still there ?? $> docker run busybox cat /etc/passwd •  Commit the newly created to an image $> docker ps –n=2 #get the container’s id $> docker commit <id> vieux/broken-busybox   •  The file is gone $> docker run vieux/broken-busybox cat /etc/passwd
  • 25. Public Index & Network •  Pull an apache image from the public index $> docker search apache $> docker pull creack/apache2 •  Run the image and check the ports $> docker run –d creack/apache2 $> docker ps •  Expose public ports $> docker run –d –p 8888:80 –p 4444:443 creack/apache2 $> docker ps  
  • 26. Creating your 1st app: the interactive way •  Using docker in interactive mode $> docker run –i –t ubuntu bash root@82c63ee50c3d:/# root@82c63ee50c3d:/# apt-get update […] root@82c63ee50c3d:/# apt-get install memcached […] root@82c63ee50c3d:/# exit •  Commit the image $> docker commit `docker ps –q –l` vieux/memcached •  Start the image $> docker run –d –p 11211 –u daemon vieux/memcached memcached
  • 27. Creating your 1st app: the boring way •  Multiple run / commit $> docker run ubuntu apt-get update $> $ID=(docker commit `docker ps –q –l`) $> docker run $ID apt-get install memcached $> docker commit `docker ps –q –l vieux/memcached •  Define default configuration at commit $> docker commit –run=‘{“Entrypoint”: [“memcached”]}’ […] •  Start the image $> docker run –d –p 11211 –u daemon vieux/memcached
  • 28. Creating your 1st app: the scripted way •  Write a Dockerfile # Memcached FROM ubuntu MAINTAINER Victor Vieux <victor@dotcloud.com> RUN apt-get update RUN apt-get install –y memcached ENTRYPOINT [“memcached”] USER daemon EXPOSE 11211 •  Buid the image $> docker build –t=vieux/memcached . •  Start the image $> docker run –d vieux/memcached memcached
  • 29. Volumes and bind mounts •  Put your persistent data in a volume $> $ID=(docker run –d –v /var/lib/mysql vieux/mysql) •  So you can re use it in another container $> docker run –d –volumes-from=$ID vieux/mysql   •  Bind mounts $> docker run –d –v /home/vv:/home <image> •  Supports read only / read write $> docker run –d –v host/path:container/path:rw <image>
  • 30. Other commands •  docker cp #copy a file from container to host •  docker diff #print container changes •  docker top #display running processes inside a container •  docker rm/rmi #delete container/image •  docker wait #wait until container stop and print exit code More on: http://docs.docker.io/en/latest/commandline/cli
  • 32. Local development •  App running in prod http://ks3100989.kimsufi.com:8080/ •  Build local  $> docker build –t=gcm . •  Test local $> docker run –p 49200:8080 gcm  http://localhost:49200 •  Change some files •  Rebuild & test $> docker build –t=gcm . $> docker run –p 49200:8080 gcm
  • 33. Push to prod •  Tag image in order to push it $> docker tag gcm ks3100989.kimsufi.com:5000/gcm •  Push image to local registry $> docker push ks3100989.kimsufi.com:5000/gcm •  On production server, download image $> docker pull ks3100989.kimsufi.com:5000/gcm •  Restart the container $> docker stop <container_id> $> docker run –d –p 8080:8080 <image>