Add auth invalidation in auth_token for identity endpoint update

Currently auth_token middleware does not concern identity endpoint
update since service catalog is not updated after service having
auth_token middleware started.

Add invalidation logic when EndpointNotfound exception occurs so
that auth_token middleware can be notified of sevice catalog update
without restart.

Change-Id: I631ee1538883d732fe3987b172d987f703dad5c0
Closes-Bug: #1813739

keystonemiddleware/auth_token/__init__.py

@@ -760,6 +760,10 @@ class AuthProtocol(BaseAuthProtocol):
                                       _CACHE_INVALID_INDICATOR)
             self.log.warning('Authorization failed for token')
             raise
+        except ksa_exceptions.EndpointNotFound:
+            # Invalidate auth in adapter for identity endpoint update
+            self._identity_server.invalidate()
+            raise
 
         return data
 

keystonemiddleware/auth_token/_identity.py

@@ -239,3 +239,6 @@ class IdentityServer(object):
 
     def fetch_ca_cert(self):
         return self._request_strategy.fetch_ca_cert()
+
+    def invalidate(self):
+        return self._adapter.invalidate()

keystonemiddleware/tests/unit/auth_token/test_auth_token_middleware.py

@@ -97,6 +97,7 @@ VERSION_LIST_v2 = fixture.DiscoveryList(v3=False, href=BASE_URI)
 
 ERROR_TOKEN = '7ae290c2a06244c4b41692eb4e9225f2'
 TIMEOUT_TOKEN = '4ed1c5e53beee59458adcf8261a8cae2'
+ENDPOINT_NOT_FOUND_TOKEN = 'edf9fa62-5afd-4d64-89ac-f99b209bd995'
 
 
 def strtime(at=None):
@@ -1534,6 +1535,8 @@ class v3AuthTokenMiddlewareTest(BaseAuthTokenMiddlewareTest,
             raise ksa_exceptions.ConnectFailure(msg)
         elif token_id == TIMEOUT_TOKEN:
             request_timeout_response(request, context)
+        elif token_id == ENDPOINT_NOT_FOUND_TOKEN:
+            raise ksa_exceptions.EndpointNotFound()
 
         try:
             response = self.examples.JSON_TOKEN_RESPONSES[token_id]
@@ -1686,6 +1689,16 @@ class v3AuthTokenMiddlewareTest(BaseAuthTokenMiddlewareTest,
         new_data = self.middleware.fetch_token(token)
         self.assertEqual(data, new_data)
 
+    def test_endpoint_not_found_in_token(self):
+        token = ENDPOINT_NOT_FOUND_TOKEN
+        self.set_middleware()
+        self.middleware._token_cache.initialize({})
+        with mock.patch.object(self.middleware._identity_server, 'invalidate',
+                               new=mock.Mock()):
+            self.assertRaises(ksa_exceptions.EndpointNotFound,
+                              self.middleware.fetch_token, token)
+            self.assertTrue(self.middleware._identity_server.invalidate.called)
+
     def test_not_is_admin_project(self):
         token = self.examples.v3_NOT_IS_ADMIN_PROJECT
         self.set_middleware(expected_env={'HTTP_X_IS_ADMIN_PROJECT': 'False'})

releasenotes/notes/bug-1813739-80eae72371903119.yaml

@@ -0,0 +1,9 @@
+---
+fixes:
+  - |
+    [`bug/1813739 <https://bugs.launchpad.net/keystonemiddleware/+bug/1813739>`_]
+    When admin identity endpoint is not created yet, keystonemiddleware emit
+    EndpointNotFound exception. Even after admin identity endpoint created,
+    auth_token middleware could not be notified of update since it does not
+    invalidate existing auth. Add an invalidation step so that endpoint
+    updates can be detected.