Setup:
nova-api ant glance-api listens using https protocol.

nova.conf has:
glance_api_servers=https://api.domain.tld:9292
image_service=nova.image.glance.GlanceImageService

Glance client shows images correct:
# glance image-list
+--------------------------------------+--------------------------+-------------+------------------+-----------+--------+
| ID                                   | Name                     | Disk Format | Container Format | Size      | Status |
+--------------------------------------+--------------------------+-------------+------------------+-----------+--------+
| bea7002a-cd8b-4aee-bc3c-86fca88e02b0 | Centos 6.x x86_64        | qcow2       | bare             | 476643328 | active |
| 6b6c7b0e-ca00-409f-b044-726aaaab4d76 | Fedora 16 x86_64         | qcow2       | bare             | 213581824 | active |
| a66dd9a9-fd98-480e-b37a-b21542f74257 | Ubuntu 12.04 LTS 64 Bits | qcow2       | bare             | 251068416 | active |
| 45e2c419-80f2-49ff-9007-6e634ac7b398 | Ubuntu 13.04 x86_64      | qcow2       | bare             | 229965824 | active |
+--------------------------------------+--------------------------+-------------+------------------+-----------+--------+

Nova client doesn't works:
% nova image-list
ERROR: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-f8391fd3-3dfc-4517-b398-46e32a7673de)


In nova-api.log:

2013-04-10 15:12:28.793 6060 DEBUG nova.utils [-] Reloading cached file /etc/nova/policy.json read_cached_file /usr/lib/python2.7/dist-packages/nova/utils.py:1078
2013-04-10 15:12:29.300 DEBUG nova.api.openstack.wsgi [req-59a0e3cd-20d3-48df-9d3c-5687f06ef742 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] No Content-Type provided in request get_body /usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py:791
2013-04-10 15:12:29.301 DEBUG nova.api.openstack.wsgi [req-59a0e3cd-20d3-48df-9d3c-5687f06ef742 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] Calling method <bound method Controller.detail of <nova.api.openstack.compute.images.Controller object at 0x44c89d0>> _process_stack /usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py:911
2013-04-10 15:12:29.332 ERROR nova.api.openstack [req-59a0e3cd-20d3-48df-9d3c-5687f06ef742 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] Caught error:
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack Traceback (most recent call last):
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/__init__.py", line 81, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return req.get_response(self.application)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/request.py", line 1296, in send
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     application, catch_exc_info=False)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/request.py", line 1260, in call_application
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     app_iter = application(self.environ, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return resp(environ, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/keystoneclient/middleware/auth_token.py", line 451, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return self.app(env, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return resp(environ, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return resp(environ, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return resp(environ, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/routes/middleware.py", line 131, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     response = self.app(environ, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return resp(environ, start_response)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     resp = self.call_func(req, *args, **self.kwargs)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return self.func(req, *args, **kwargs)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py", line 890, in __call__
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     content_type, body, accept)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py", line 942, in _process_stack
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     action_result = self.dispatch(meth, request, action_args)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py", line 1022, in dispatch
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     return method(req=request, **action_args)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/images.py", line 205, in detail
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     **page_params)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 213, in detail
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     for image in images:
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/glanceclient/v1/images.py", line 149, in paginate
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     images = self._list(url, "images")
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/glanceclient/common/base.py", line 53, in _list
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     resp, body = self.api.json_request('GET', url)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/dist-packages/glanceclient/common/http.py", line 222, in json_request
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     resp, body_iter = self._http_request(url, method, **kwargs)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack
  File "/usr/lib/python2.7/dist-packages/glanceclient/common/http.py", line 184, in _http_request
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     resp = conn.getresponse()
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/httplib.py", line 1030, in getresponse
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     response.begin()
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/httplib.py", line 407, in begin
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     version, status, reason = self._read_status()
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/httplib.py", line 365, in _read_status
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     line = self.fp.readline()
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack   File "/usr/lib/python2.7/socket.py", line 430, in readline
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack     data = recv(1)
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack WantReadError
2013-04-10 15:12:29.332 6060 TRACE nova.api.openstack
2013-04-10 15:12:29.337 INFO nova.api.openstack [req-59a0e3cd-20d3-48df-9d3c-5687f06ef742 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] https://api.domain.tld:8774/v2/e53acf8733034bd89fa39f7a8d4f9630/images/detail returned with HTTP 500
2013-04-10 15:12:29.338 DEBUG nova.api.openstack.wsgi [req-59a0e3cd-20d3-48df-9d3c-5687f06ef742 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] Returning 500 to user: The server has either erred or is incapable of performing the requested operation. __call__ /usr/lib/python2.7/dist-packages/nova/api/openstack/wsgi.py:1165
2013-04-10 15:12:29.339 INFO nova.osapi_compute.wsgi.server [req-59a0e3cd-20d3-48df-9d3c-5687f06ef742 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] <ip> "GET /v2/e53acf8733034bd89fa39f7a8d4f9630/images/detail HTTP/1.1" status: 500 len: 335 time: 0.5630920


glance-api.log says that all is OK:
2013-04-10 15:15:11.042 12980 DEBUG glance.api.middleware.version_negotiation [-] Determining version of request: GET //v1/images/detail Accept:  process_request /usr/lib/python2.7/dist-packages/glance/api/middleware/version_negotiation.py:46
2013-04-10 15:15:11.043 12980 DEBUG glance.api.middleware.version_negotiation [-] Using url versioning process_request /usr/lib/python2.7/dist-packages/glance/api/middleware/version_negotiation.py:59
2013-04-10 15:15:11.043 12980 DEBUG glance.api.middleware.version_negotiation [-] Matched version: v1 process_request /usr/lib/python2.7/dist-packages/glance/api/middleware/version_negotiation.py:71
2013-04-10 15:15:11.043 12980 DEBUG glance.api.middleware.version_negotiation [-] new uri /v1/images/detail process_request /usr/lib/python2.7/dist-packages/glance/api/middleware/version_negotiation.py:72
2013-04-10 15:15:11.053 DEBUG glance.api.policy [4a9817f5-1329-4d80-85b0-1b2e615c8495 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] Loaded policy rules: {u'default': '@', u'manage_image_cache': 'role:admin'} load_rules /usr/lib/python2.7/dist-packages/glance/api/policy.py:72
2013-04-10 15:15:11.054 DEBUG glance.common.client [4a9817f5-1329-4d80-85b0-1b2e615c8495 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] Constructed URL: https://api.domain.tld:9191/images/detail?is_public=none&limit=20 _construct_url /usr/lib/python2.7/dist-packages/glance/common/client.py:397
2013-04-10 15:15:11.132 DEBUG glance.registry.client [4a9817f5-1329-4d80-85b0-1b2e615c8495 a88019e6a2aa45868af59c1dfc201185 e53acf8733034bd89fa39f7a8d4f9630] Registry request GET /images/detail HTTP 200 request id req-e4d7e2ff-b564-48c3-b18a-6b684d3e1c7b do_request /usr/lib/python2.7/dist-packages/glance/registry/client.py:95