A customer was getting a bad error: : Block Device Mapping is Invalid.

It was because the cbs wasn’t building in time from the image , and the build was timing out. So the solution was pretty simple. Add the CBS first:

 supernova customer volume-create 55 --volume-type=SSD --display-name=starating --image-id=5674345-dfgegdf-34553531123

Oh, thanks Aaron dude. You rock.