Comment 3 for bug 1689673

Thanks @Sahdev. After looking at this code I'm wondering if we want to continue to support a defined set of versions of images? It seems like it will be impossible to keep up with the latest releases of Ubuntu/Fedora/Cirros/etc. We are already way behind, and we don't have newer images like coreOS. If there is a maintained list of "well-known" images somewhere we could try to leverage that instead of trying to keep our list up-to-dare. Thoughts? Thanks!