Comment 5 for bug 1497484

I was able to reproduce the bug quite easily given the recommended configuration; the error occurs in the Nova API, and none of the other services seem to log anything untoward happening at all:

    2016-01-14 22:23:55.831 DEBUG nova.api.openstack.wsgi [req-1ad0dc6d-5021-4d6c-8f92-b4333e61849e admin admin] Action: 'action', calling method: <bound method ServersController._action_create_image of <nova.api.openstack.compute.servers.ServersController object at 0x7fd2a9c5b450>>, body: {"createImage": {"name": "zomg", "metadata": {}}} from (pid=15657) _process_stack /opt/stack/nova/nova/api/openstack/wsgi.py:795
    2016-01-14 22:23:55.979 DEBUG nova.compute.api [req-1ad0dc6d-5021-4d6c-8f92-b4333e61849e admin admin] [instance: c3a69c63-e0e7-4b58-aadc-51e53ba2478d] Fetching instance by UUID from (pid=15657) get /opt/stack/nova/nova/compute/api.py:1946
    2016-01-14 22:23:56.086 INFO nova.api.openstack.wsgi [req-1ad0dc6d-5021-4d6c-8f92-b4333e61849e admin admin] HTTP exception thrown: 400 Bad Request: Invalid disk format 'qcow2' for image. (HTTP 400)
    2016-01-14 22:23:56.087 DEBUG nova.api.openstack.wsgi [req-1ad0dc6d-5021-4d6c-8f92-b4333e61849e admin admin] Returning 400 to user: 400 Bad Request: Invalid disk format 'qcow2' for image. (HTTP 400) from (pid=15657) __call__ /opt/stack/nova/nova/api/openstack/wsgi.py:1180
    2016-01-14 22:23:56.090 INFO nova.osapi_compute.wsgi.server [req-1ad0dc6d-5021-4d6c-8f92-b4333e61849e admin admin] 10.0.2.15 "POST /v2.1/1b03f2f440e74a8191d8d62027c1e460/servers/c3a69c63-e0e7-4b58-aadc-51e53ba2478d/action HTTP/1.1" status: 400 len: 402 time: 0.2918901