Hello Docker

A little about me.

A little about you.

So what is Docker?

"Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications."
-via Docker.com

Ok what does that mean?

Fundamentally, a usability layer on top of Linux Containers (written in Go)

Some History

Started as internal project at DotCloud
Open Sourced in March 2013
Has large vibrant community
1.0 released in June 2014
Current release guidance docs:
https://docs.docker.com/install/

Containers?

A way to isolate processes on a host machine without the heavy overhead of a Virtual Machine.

Containers vs Virtual Machines

So why should we care?

As developers?

Develop with production configuration and environments
Make it easier to share your application and its surrounding software stack in a light weight fashion
Much easier and less stressful trying new technologies.

Current Workflow

Local Stack Setup --> Pushes to GIT --> Testing Server Runs tests --> If passed code deployed to production

Docker Workflow

Local Containerized Stack Setup --> Pushes to GIT --> Testing Server Builds image and tests--> Image is pushed to registry --> Built Image deployed to production

As sysadmins?

Simple tools to define your containers using Dockerfiles. Dont have to learn a new syntax like Puppet or Chef.
Creating test environments and the general portabilty of your infrastructure increases
Greater flexibility with scaling applications across different geographical locations and cloud service providers

How do we use Docker?

It can be installed on all major platforms.
For Windows and Mac it runs in its own VM
The Docker daemon can be accessed via a command line tool OR via the RESTful API.

Images

Used to store your app

Containers

Used to run your app

Ok enough talk, lets demo!

Further exploration:

Questions?

Slides available at:
http://nickgs.com/hello-docker/

Lets connect:

https://www.linkedin.com/in/nickgs/ https://twitter.com/direct