Comment 4 for bug 1546507

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Stuart McLaren (stuart-mclaren) wrote : Re: Regular user can delete any image file

My understanding (which may not be 100%) is that the rbd location is used by Cinder.

If a user wants to create a new volume from an existing image this can be done in two ways:

1) the image can be streamed as usual
2) if the image backend is rbd, and the location is known, a short cut can be taken: the image bytes don't need to be streamed. Instead a quick clone of the backing volume can be performed.

If the consumer of the location field is typically another OpenStack service (Cinder/whatever) it may be worth considering using Service Tokens here.

We could only expose the location if the request contained a particular role granted by a Service Token. In that way the end user wouldn't see the locations but other OpenStack services could.