Hello. Do you know of anyone who tried having running metaflow on on-premise kubernetes using openstack with minio?

I'm not sure about the openstack part but on-prem K8s with Minio should work. See instructions here: https://github.com/outerbounds/metaflow-with-airflow-minio (the instructions are not specific to Metaflow-with-Airflow, although the name seems to indicate it)