I'm trying to launch an instance from an image, and also attach an iso to it that contains config data for that instance. I can do this via --block-device on a test box where I have Cinder installed. However, on my test box without Cinder (I don't actually need it for anything else in this test) this doesn't work. I tried changing the destination to local rather than volume and it says that combination is not supported. I tried switching to using a config-drive, and while this works with a small config file, it fails with the message "request is too large" when I include all of the info I actually need. Is there any other way to handle this short of installing Cinder? I just tried to add it on and got lots of errors (never added it after initial install before), and I don't need it for anything else, so I'm hoping to avoid going down this path if possible.

Thanks!