https://www.theregister.co.uk/2019/04/10/raise_a_stein_for_openstack_the_latest_release_improves_containers_resource_management/

The latest OpenStack release is out in the wilds. Codenamed Stein, the platform update is said to allow for much faster Kubernetes deployments, new IP and bandwidth management features, and introduces a software module focused on cloud resource management – Placement.

In keeping with the tradition, the 19th version of the platform was named Stein after Steinstraße or "Stein Street" in Berlin, where the OpenStack design summit for the corresponding release took place in 2018.