Open Stack

Hi,

I'm just starting to explore the OpenStack framework, concepts, etc.

From what I understand, OpenStack makes use of SQLAlchemy for database connectivity.  For connecting to MySQL that seems to use MySQL-Python by default, which is licensed under the GPLv2.

Here's where I get a bit confused.  OpenStack is licensed under Apache 2.0, which is generally NOT considered compatible with GPLv2.  So how can these components legally be combined together?

Thanks,
Chris