As far as how far back this goes in nova, I'm sure it impacts at least all of the currently supported upstream stable branches. I don't know at what point instance_type.disk==0 was introduced though, that would require some digging.
As far as how far back this goes in nova, I'm sure it impacts at least all of the currently supported upstream stable branches. I don't know at what point instance_ type.disk= =0 was introduced though, that would require some digging.