Setup and Scale Out Openstack

Hello, I need help setting up and scaling out Openstack. Okay here is what I want to achieve. I want to scale that single VM onto multiple openstack instances (I can specify the amount right? I am looking to scale to about 1 million instances). I want a single VM with gpu pass through per Openstack instance (single node per VM/Openstack instance and so 1 million total single node instances total). So to be clear it is 1 VM with GPU pass through hosted on 1 million different Openstack single node. Please explain what I want in your own words and explain what approach you will use to complete the task.