Assign compute_instance to specific OpenStack node

First time poster, sorry if this does not A) belong here, and B) has already been asked.

We use OpenStack and have a number of high-performance nodes used for things like k8s stacks and the like. I am having a difficult time how I would go about targeting these specific nodes with openstack_compute_instance_v2. I have been unable to find any examples and am not 100% on the documentation.

Has anyone done something like this and can share how they went about it?

Thank you in advance and I would be happy to further explain what I am trying to do if I did not make it clear above. Much appreciated!