Created question in FIWARE Q/A platform on 09-01-2017 at 14:01
Please, ANSWER this question AT https://stackoverflow.com/questions/41548799/unauthorized-the-request-you-have-made-requires-authentication-http-401-on

Question:
"Unauthorized: The request you have made requires authentication. (HTTP 401)" on Fiware Horizon

Description:
I am new to FIWARE. On my Ubuntu 16.04, I have setup Fiware's KeyRock which is a combination of OpenStack Keystone Identity Management and Horizon Dashboard. I have used this guide to set up everything.

After installing Keystone (which is a RESTful API), I have used curl to send HTTP requests and everything is working fine, i.e. I can run these commands on the keystone server using curl.

However, when I run Horizon on the same server using the reference Django project located in the openstack_dashboard directory with:

sudo tools/with_venv.sh python manage.py runserver 0.0.0.0:8000,

Horizon server starts with no errors but when I access it via browser, I get the following error:

A server error occured. Please contact the administrator

On the Keystone server console, I get the following error:

2017-01-09 11:53:40.962 13285 ERROR keystone.notifications [-] Failed to construct notifier
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications Traceback (most recent call last):
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications File "/keystone/keystone/notifications.py", line 220, in _get_notifier
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications transport = messaging.get_transport(CONF)
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications File "/keystone/.venv/local/lib/python2.7/site-packages/oslo/messaging/transport.py", line 185, in get_transport
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications invoke_kwds=kwargs)
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications File "/keystone/.venv/local/lib/python2.7/site-packages/stevedore/driver.py", line 45, in _init_
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications verify_requirements=verify_requirements,
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications File "/keystone/.venv/local/lib/python2.7/site-packages/stevedore/named.py", line 55, in _init_
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications verify_requirements)
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications File "/keystone/.venv/local/lib/python2.7/site-packages/stevedore/extension.py", line 170, in _load_plugins
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications self._on_load_failure_callback(self, ep, err)
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications File "/keystone/.venv/local/lib/python2.7/site-packages/stevedore/driver.py", line 50, in _default_on_load_failure
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications raise err
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications ImportError: cannot import name _uuid_generate_random
2017-01-09 11:53:40.962 13285 TRACE keystone.notifications
2017-01-09 11:53:40.964 13285 WARNING keystone.common.wsgi [-] Authorization failed. The request you have made requires authentication. from 127.0.0.1
2017-01-09 11:53:40.970 13285 INFO eventlet.wsgi.server [-] 127.0.0.1 - - [09/Jan/2017 11:53:40] "POST /v3/auth/tokens HTTP/1.1" 401 331 0.261293

On the Horizon server console, I get the following error:

DEBUG:idm_logger:Creating a new internal keystoneclient connection to http://0.0.0.0:5000/v3.
Unauthorized: The request you have made requires authentication. (HTTP 401)
Traceback (most recent call last):
File "/horizon/openstack_dashboard/fiware_api/keystone.py", line 990, in _get_element_and_cache
resource_element = function(request, element)
File "/horizon/openstack_dashboard/fiware_api/keystone.py", line 1022, in <lambda>
request, basic, lambda req, n: internal_keystoneclient(req).roles.find(name=n), pickle_props=['name'])
File "/horizon/openstack_dashboard/fiware_api/keystone.py", line 64, in internal_keystoneclient
cache.set(CACHE_CLIENT, keystoneclient.session.get_token(), INTERNAL_CLIENT_CACHE_TIME)
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/session.py", line 610, in get_token
return (self.get_auth_headers(auth) or {}).get('X-Auth-Token')
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/session.py", line 589, in get_auth_headers
return auth.get_headers(self, **kwargs)
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/auth/base.py", line 114, in get_headers
token = self.get_token(session)
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/auth/identity/base.py", line 104, in get_token
return self.get_access(session).auth_token
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/auth/identity/base.py", line 144, in get_access
self.auth_ref = self.get_auth_ref(session)
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/auth/identity/v3.py", line 127, in get_auth_ref
authenticated=False, log=False, **rkwargs)
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/session.py", line 488, in post
return self.request(url, 'POST', **kwargs)
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/utils.py", line 318, in inner
return func(*args, **kwargs)
File "/horizon/.venv/src/python-keystoneclient/keystoneclient/session.py", line 389, in request
raise exceptions.from_response(resp, method, url)
Unauthorized: The request you have made requires authentication. (HTTP 401)
Traceback (most recent call last):
File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
self.result = application(self.environ, self.start_response)
File "/horizon/.venv/local/lib/python2.7/site-packages/django/contrib/staticfiles/handlers.py", line 64, in _call_
return self.application(environ, start_response)
File "/horizon/.venv/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 168, in _call_
self.load_middleware()
File "/horizon/.venv/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 46, in load_middleware
mw_instance = mw_class()
File "/horizon/.venv/local/lib/python2.7/site-packages/django/middleware/locale.py", line 23, in _init_
for url_pattern in get_resolver(None).url_patterns:
File "/horizon/.venv/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 367, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/horizon/.venv/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 361, in urlconf_module
self._urlconf_module = import_module(self.urlconf_name)
File "/usr/lib/python2.7/importlib/_init_.py", line 37, in import_module
_import_(name)
File "/horizon/openstack_dashboard/urls.py", line 36, in <module>
from openstack_dashboard.dashboards.idm_admin.user_accounts \
File "/horizon/openstack_dashboard/dashboards/idm_admin/user_accounts/views.py", line 28, in <module>
from openstack_dashboard.dashboards.idm_admin.user_accounts \
File "/horizon/openstack_dashboard/dashboards/idm_admin/user_accounts/forms.py", line 195, in <module>
class UpdateAccountForm(forms.SelfHandlingForm, UserAccountsLogicMixin):
File "/horizon/openstack_dashboard/dashboards/idm_admin/user_accounts/forms.py", line 202, in UpdateAccountForm
choices=get_account_choices())
File "/horizon/openstack_dashboard/dashboards/idm_admin/user_accounts/forms.py", line 172, in get_account_choices
use_idm_account=True),
File "/horizon/openstack_dashboard/fiware_api/keystone.py", line 1022, in get_basic_role
request, basic, lambda req, n: internal_keystoneclient(req).roles.find(name=n), pickle_props=['name'])
File "/horizon/openstack_dashboard/fiware_api/keystone.py", line 997, in _get_element_and_cache
exceptions.handle(request)
File "/horizon/horizon/exceptions.py", line 291, in handle
messages.error(request, message or fallback)
File "/horizon/horizon/messages.py", line 83, in error
fail_silently=fail_silently)
File "/horizon/horizon/messages.py", line 41, in add_message
if not horizon_message_already_queued(request, message):
File "/horizon/horizon/messages.py", line 28, in horizon_message_already_queued
if request.is_ajax():
AttributeError: 'NoneType' object has no attribute 'is_ajax'
[09/Jan/2017 12:39:35] "GET / HTTP/1.1" 500 59

I am sending a GET request via the browser but the Keystone server is receiving a POST request as indicated in its console output. I don't understand why is this so.