create volume from image API level constraints

[Mate Lakat]

Creating volumes from glance does make assumptions on the underlying copy implementation. Hardwired values tie together the api and the implementation.

An example to make it clearer:
- If there is a volume driver, that could deal with ovf images as well, it should be able to tell the API to let such requests in.

The change that added the constraints is:

https://review.openstack.org/19808

The constraints should be exposed by the driver.

[Mate Lakat (mate-lakat)]

The same problem happens during upload:

+ cinder upload-to-image --container-format=ovf --disk-format=vhd f1aab857-2459-419a-b7d2-527458f5a9ef imagefromvolume
ERROR: Invalid input received: Image format must be one of raw, qcow2, vmdk, or vdi. (HTTP 400) (Request-ID: req-c4a63731-d927-437f-807e-f307f56fb41f)

[John Griffith (john-griffith)]

I believe you just need an update, I fixed this the other day:
https://review.openstack.org/#/c/20978/1