I've tried changing the /etc/glance/policy.json and setting the following:

```
"publicize_image": "role:member",

```

And then restarting both the glance-api and glance-registry services but of course that would be too easy so it doesn't work :)

```
openstack image create --file gammy_image.iso JACOBS-GAMMY-IMAGE --public
403 Forbidden
You are not authorized to complete publicize_image action.
    (HTTP 403)

```