Introduction to Docker

This is a intro talk I have given to Docker-Bangalore group http://www.meetup.com/Docker-Bangalore/

Transcript

1. Introduction to Docker Vamsee Kanakala
2. So what is Docker? • A wrapper over LXC • Tries to commoditize LXC • Enables portable deployments • Simplifies things like CI / CD • Efficient, quick provisioning • Versioning of images (like git) • Takes an application centric view
3. A bit more about LXC • Provides OS-level virtualization for Linux • Own process space • Own network interface • Own init framework • Isolation achieved with cgroups • But shares kernel with the host
4. A typical Docker image Image from “The Docker Book” by James Turnbull
5. A basic workflow • Pull docker images from public registry • Run it on your host • Add your own changes • Push it back to share them • Or you could build from ground up... • You can also setup a private registry • Or just sign up for a SaaS offering
6. Dockerfile • The canonical way to build your image • Basically a glorified shell script • But definitely easier to maintain • FROM, RUN, CMD, EXPOSE, ENV, ADD, WORKDIR, VOLUME, etc. • Create your own base image with tools like debootstrap • Use the cache, Luke
7. Some links... • Docker home page: www.docker.io • Docker blog: http://blog.docker.io • Docker book: www.dockerbook.com • Jeremy Petazzoni's Talk at Yandex: http://tech.yandex.ru/events/yac/2013/talks/108 5 • Dokku, Flynn.io, CoreOS, Deis.io, Quay.io, Orchardup.com, boot2docker, etc.
8. Thank you! Questions? @vamsee vamsee@viamentis.com One small announcement...
9. Please come to RootConf 2014! https://rootconf.in/2014/ CFP is already open: https://funnel.hasgeek.com/rootconf2014/