Comment 10 for bug 1546507

Now there is no ability to prevent it. In v2 this behavior is disabled by default, but v1 always allows setting a single location to multiple image.

Today we're discussing about adding uniqueness to location urls in glance db. But it won't help, at least for Ceph backend, because there are several ways to get an object from store (see my post #8). So I found only one easy solution - if url scheme is not 'http(s), then deprecate adding custom location if url doesn't contain original image id. It prevents adding link to external images.

I wrote this code and now I'm testing it and developing tests. I believe I'll upload a patch very soon.