Introducing docker
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This document introduces Docker, a platform for developers and sysadmins to build and run distributed applications. It discusses what Linux containers are, how Docker uses containers to package applications and dependencies, and how containerization differs from traditional virtualization. The key benefits of Docker are that it allows applications to be easily built, shipped and run anywhere while increasing efficiency over virtual machines. A demo will show how to install Docker, pull images, create and run containers, and build custom images.
Introducing docker
- 2. Who am I?
- 3. Talk ➔ What is a linux container? ➔ What is Docker? ➔ Traditional virtualization vs. container virtualization ➔ Who is it for? ➔ Why Docker? ➔ Analogy with traditional virtualization Agenda Demo ➔ Install Docker ➔ Pull a Docker image ➔ Create a container ➔ Create your own image
- 4. What is a linux container? ➔ chroot on steroids. ➔ Isolated user space instances. ➔ Look and feel like a real server from the point of view of its owners and users. ➔ Resource and network isolation provided by cgroups. ➔ LXC and libcontainer ➔ Analogy behind the idea...
- 11. What is Docker? ➔ Platform for developers and sysadmins to build, ship, and run distributed applications. ➔ Tool to speedily create and run containers. ➔ Create and ship images in a jiffy! ➔ Automates deployment of applications inside Linux containers. ➔ Eliminates friction between dev, QE/QA and prod!
- 12. Traditional virtualization vs. container virtualization
- 13. Traditional virtualization vs. container virtualization (contd.) Traditional ➔ Apps, binaries and libraries - approx a few MBs ➔ Entire guest OS - a few GBs Containers ➔ Application and its dependencies ➔ Runs isolated in user space only! ➔ Containers share kernel with the host
- 14. Benefits to Developers ➔ Build apps in any language using existing tools ➔ Dockerize the app and run it safely anywhere ➔ Where anywhere is: 1. Colleague’s OS X system 2. QA systems running Ubuntu in the cloud 3. Production systems running Red Hat Enterprise Linux
- 15. Benefits to SysAdmins ➔ Can provide standardized environments for dev, QA and prod teams. ➔ No more “Works for me” excuse. ➔ Freedom to deploy workloads on any of the following: 1. On-premise bare metal 2. Data center VMs 3. Public clouds ➔ Run a lot more containers than VMs.
- 16. Why Docker? ➔ Encapsulate any payload and its dependencies ➔ Works on VMs, bare metal, OpenStack without any modification ➔ Standard operations to start, run, stop, etc. ➔ Light weight ➔ Supported by numerous major companies - Red Hat, Google, Canonical, Microsoft, etc.
- 17. Analogy with Traditional Virtualization Traditional Virtualization (KVM) ➔ libvirt ➔ Distro iso ➔ Virtual machine Container Virtualization ➔ libcontainer/LXC ➔ Docker images ➔ Containers
- 18. Contribute! ➔ https://github.com/docker/docker ➔ http://docker.com ➔ Docker Google Groups ➔ Docker on StackOverflow ➔ #docker & #docker-dev on freenode
- 19. Content & Image References ➔ http://en.wikipedia.org ➔ http://docker.com ➔ http://www.slideshare.net/dotCloud/why-docker ➔ http://redhat.com ➔ http://auberginesolutions.com
- 20. Thank You!