I am following this guide, and have trouble doing anything with glance. I first stumpled across this when I tried to add an image like this:

[root@cloud ~]# glance -d image-create --is-public true --disk-format qcow2 --container-format bare --name "Ubuntu" <precise-server-cloudimg-amd64.img 
   HTTP/1.1 404 Not Found
    date: Fri, 05 Jul 2013 15:27:46 GMT
    content-length: 52
    content-type: text/plain; charset=UTF-8
    x-openstack-request-id: req-ba4ea9c8-ccab-486c-ada2-5a8ac00d8d5c

    404 Not Found

    The resource could not be found.



    Request returned failure status.
    404 Not Found
    The resource could not be found.
        (HTTP 404)

Doing an glance image-list gives the same error. In /var/log/glance/api.log, I find

   2013-07-05 17:27:46.613 1653 DEBUG glance.api.middleware.version_negotiation [-] Determining version of request: POST //v1/images Accept:  process_request /usr/lib/python2.7/site-packages/glance/api/middleware/version_negotiation.py:46
    2013-07-05 17:27:46.618 1653 DEBUG glance.api.middleware.version_negotiation [-] Using url versioning process_request /usr/lib/python2.7/site-packages/glance/api/middleware/version_negotiation.py:59
    2013-07-05 17:27:46.619 1653 DEBUG glance.api.middleware.version_negotiation [-] Matched version: v1 process_request /usr/lib/python2.7/site-packages/glance/api/middleware/version_negotiation.py:71
    2013-07-05 17:27:46.620 1653 DEBUG glance.api.middleware.version_negotiation [-] new uri /v1/images process_request /usr/lib/python2.7/site-packages/glance/api/middleware/version_negotiation.py:72

While doing the image-create command, I can see in top that glance is working for a while, being at the top of the process list. So it seems that glance is connecting and working, but then somehow fails.

On a sidenote, not sure if thats related: when stopping the glance daemons, I get

    2013-07-05 16:05:39.703 3624 CRITICAL glance [-] [Errno 13] Permission denied
    2013-07-05 16:05:39.703 3624 TRACE glance Traceback (most recent call last):
    2013-07-05 16:05:39.703 3624 TRACE glance   File "/usr/bin/glance-api", line 65, in <modu
    le>
    2013-07-05 16:05:39.703 3624 TRACE glance     server.wait()
    2013-07-05 16:05:39.703 3624 TRACE glance   File "/usr/lib/python2.7/site-packages/glance
    /common/wsgi.py", line 271, in wait
    2013-07-05 16:05:39.703 3624 TRACE glance     self.wait_on_children()
    2013-07-05 16:05:39.703 3624 TRACE glance   File "/usr/lib/python2.7/site-packages/glance
    /common/wsgi.py", line 244, in wait_on_children
    2013-07-05 16:05:39.703 3624 TRACE glance     pid, status = os.wait()
    2013-07-05 16:05:39.703 3624 TRACE glance   File "/usr/lib/python2.7/site-packages/glance/common/wsgi.py", line 210, in kill_children
    2013-07-05 16:05:39.703 3624 TRACE glance     os.killpg(pgid, signal.SIGTERM)
    2013-07-05 16:05:39.703 3624 TRACE glance OSError: [Errno 13] Permission denied
    2013-07-05 16:05:39.703 3624 TRACE glance

I had a look at the code, and its the os.killpg(pgid, signal.SIGTERM that causes this, but nonetheless, the daemon is stopped.