Comment 3 for bug 1715102

@Corey,

After searching a bit, it might be ok with a wishlist rather than a bug. Because IMAGES_ALLOW_LOCATION seems brought by a sane reason as glance v1 vs v2 does not have 1:1 feature mapping.

The request to support IMAGES_ALLOW_LOCATION was a originally from a customer, but here is an excerpt of my answer.

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After looking up, it's not so simple. Horizon had a major overhaul when switching from Glance API v1 to v2 in Newton. "Copy from URL" feature in v1 was not implemented in v2, so Horizon cannot copy images from URL. Also, Glance API v1 is deprecated and will be removed sooner or later.

https://blueprints.launchpad.net/horizon/+spec/horizon-glance-v2

    When using v2:

    Same as v1, except:
    - Metadata menu available for images in the admin panel
    - Possibly it won't be possible to upload an image via URL (until bug 1419040 is resolved)

Glance API v2 has a simpler function called "Import from URL"(https://wiki.openstack.org/wiki/Glance-tasks-import), but Horizon as an upstream does not support it yet.