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Installing Docker
Every execution on CodaLab happens in a docker container, which provides a standardized environment that is lighter-weight than a full virtual machine.
This page informs you how to install dockers, but it is a little outdated. You may be better off using directly these instructions.
To install docker on your local machine (either if you want see what's actually in the environment or to run your own local CodaLab instance), follow these instructions:
sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
sudo sh -c "echo deb https://apt.dockerproject.org/repo ubuntu-trusty main > /etc/apt/sources.list.d/docker.list"
sudo apt-get update
sudo apt-get install docker-engine
sudo useradd $USER docker
If you are upgrading docker, then you might need to remove devicemapper by doing this.
To start docker:
sudo service docker start
Then, to test out your environment, open a shell (the first time you do this, it will take some time to download the image):
docker run -ti ubuntu bash
Because Windows and OS X don't support LXC natively, you need to actually install Docker in a VM that you access from your machine. Thankfully, Docker has already packaged a solution for this that they release whenever they have a version bump of docker: Docker Toolbox (click for download page). After selecting the download for your OS, go through and follow the setup instructions for your platform:
The docker-machine binary is used to control the VM running Docker. By default, there is a VM named "default" that you can start and stop when you would like to use Docker.
To start the VM and allow you to use Docker:
> docker-machine start default
> eval $(docker-machine env default)