I started installing OpenStack Liberty release using virtual machines with Ubuntu 14.04 (for controller and compute as described in Liberty installation guide), the installed services before I started getting the exception are keystone, glance and compute, one of the commands suggested in the installation guide to verify nova installation is "nova image-list" (The last command in Verify operation section for nova), but when I run "nova image-list" I got the following message:
# nova image-list
ERROR (ClientException): Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'glanceclient.exc.HTTPUnauthorized'> (HTTP 500) (Request-ID: req-c910e363-0ba5-4159-b5cd-f0d471387a79)
For nova-api logs, the logged lines are as follows:
2016-03-03 14:44:04.055 2848 INFO nova.osapi_compute.wsgi.server [req-33493148-71af-47e4-8f28-8214877c3221 45065ecf46d84026a8dc482be5df7394 efe669657d19466c9280a96df4699bf2 - - -] 10.10.10.11 "GET /v2/ HTTP/1.1" status: 200 len: 572 time: 0.1457450
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions [req-c910e363-0ba5-4159-b5cd-f0d471387a79 45065ecf46d84026a8dc482be5df7394 efe669657d19466c9280a96df4699bf2 - - -] Unexpected exception in API method
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions Traceback (most recent call last):
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/openstack/extensions.py", line 478, in wrapped
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions return f(*args, **kwargs)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/images.py", line 145, in detail
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions **page_params)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/image/api.py", line 68, in get_all
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions return session.detail(context, **kwargs)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/image/glance.py", line 284, in detail
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions for image in images:
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/glanceclient/v1/images.py", line 254, in list
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions for image in paginate(params, return_request_id):
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/glanceclient/v1/images.py", line 238, in paginate
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions images, resp = self._list(url, "images")
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/glanceclient/v1/images.py", line 63, in _list
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions resp, body = self.client.get(url)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/glanceclient/common/http.py", line 280, in get
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions return self._request('GET', url, **kwargs)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/glanceclient/common/http.py", line 272, in _request
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions resp, body_iter = self._handle_response(resp)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/glanceclient/common/http.py", line 93, in _handle_response
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions raise exc.from_response(resp, resp.content)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions HTTPUnauthorized: 401 Unauthorized: Authentication required (HTTP 401)
2016-03-03 14:44:06.368 2848 ERROR nova.api.openstack.extensions
2016-03-03 14:44:06.388 2848 INFO nova.api.openstack.wsgi [req-c910e363-0ba5-4159-b5cd-f0d471387a79 45065ecf46d84026a8dc482be5df7394 efe669657d19466c9280a96df4699bf2 - - -] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'glanceclient.exc.HTTPUnauthorized'>
2016-03-03 14:44:06.391 2848 INFO nova.osapi_compute.wsgi.server [req-c910e363-0ba5-4159-b5cd-f0d471387a79 45065ecf46d84026a8dc482be5df7394 efe669657d19466c9280a96df4699bf2 - - -] 10.10.10.11 "GET /v2/efe669657d19466c9280a96df4699bf2/images/detail HTTP/1.1" status: 500 len: 438 time: 1.6221261
Check your setup again, the 401 means you probably don't have your auth setup correctly between services such that nova doesn't have access to talk to glance.