Open Stack

> Looks like this change is what I need, but was the code supposed to not set
> it to ec2-user when instance_user is unset? I've always had it unset and
> it's always set it to ec2-user, certainly for Ubuntu images anyway, I've
> not tested others.

It's a common misconception. Unset is different from the empty string. If you don't set it, it keeps using the default value, which is ec2-user. If you set it to the empty string, it keeps whatever the image is using. If you don't that you shouldn't need this change.

-- 
Thomas