ml-agents/docs/Training-on-Amazon-Web-Service.md

This page contains instructions for setting up an EC2 instance on Amazon Web Service for use in training ML-Agents environments. Current limitations of the Unity Engine require that a screen be available to render to. In order to make this possible when training on a remote server, a virtual screen is required. We can do this by installing Xorg and creating a virtual screen. Once installed and created, we can display the Unity environment in the virtual environment, and train as we would on a local machine.

Instructions here are adapted from this Medium post on running general Unity applications in the cloud.

1. To begin with, you will need an EC2 instance which contains the latest Nvidia drivers, CUDA8, and cuDNN. There are a number of external tutorials which describe this, such as:
   • Getting CUDA 8 to Work With openAI Gym on AWS and Compiling Tensorflow for CUDA 8 Compatibility
   • Installing TensorFlow on an AWS EC2 P2 GPU Instance
   • Updating Nvidia CUDA to 8.0.x in Ubuntu 16.04 – EC2 Gx instance
2. Move python to remote instance.
3. Install the required packages with pip install ..
4. Run the following commands to install Xorg:

   sudo apt-get update
   sudo apt-get install -y xserver-xorg mesa-utils
   sudo nvidia-xconfig -a --use-display-device=None --virtual=1280x1024
   

5. Restart the EC2 instance.
6. On start-up, run:

   sudo /usr/bin/X :0 &
   export DISPLAY=:0
   

   Depending on how Xorg is configured, you may need to run sudo killall Xorg before starting Xorg with the above command.

7. To ensure the installation was succesful, run glxgears. If there are no errors, then Xorg is correctly configured.
8. There is a bug in Unity 2017.1 which requires the uninstallation of libxrandr2, which can be removed with apt-get remove --purge libxrandr2. This is scheduled to be fixed in 2017.3.

If all steps worked correctly, upload an example binary built for Linux to the instance, and test it from python with:

from unityagents import UnityEnvironment

env = UnityEnvironment(your_env)

You should receive a message confirming that the environment was loaded succesfully.