Did you also hit any issue deploying OpenStack or just testing the packages out of it?
The Train packages for EL7 (gRPC 1.20, protobuf 3.6) work fine.
Just a heads-up - I manually compiled gRPC 1.27.x (wow — that is hard to do) with CBS's protobuf and I got the quickstart to work.
Latest fedora build is 1.26.0, i'm finding out if any update is ongoing
Anthony Alba
Regards,
Alfredo
Currently just testing packages out of CBS for EL8 (haven't tried deploying Ussuri yet).
Regards Anthony