![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](https://image.slidesharecdn.com/docker-meetup-paris-131003160053-phpapp02/85/Docker-presentation-Paris-Docker-Meetup-26-320.jpg)
![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](https://image.slidesharecdn.com/docker-meetup-paris-131003160053-phpapp02/85/Docker-presentation-Paris-Docker-Meetup-27-320.jpg)
![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](https://image.slidesharecdn.com/docker-meetup-paris-131003160053-phpapp02/85/Docker-presentation-Paris-Docker-Meetup-28-320.jpg)
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
- 21. Basic commands
- 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>
- 34. Questions ?