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[Bug 1895670] [NEW] keystone api v3/ec2tokens return 500

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Ethan Lynn <1895670@xxxxxxxxxxxxxxxxxx>
Date: Tue, 15 Sep 2020 13:21:53 -0000
Reply-to: Bug 1895670 <1895670@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

Some heat users still use ec2tokens api for scaling authentication, but
when heat tried to authenticate through ec2tokens API, it got 500 error
code.

Here is the keystone api logs
172.18.3.0 - - [15/Sep/2020:11:24:10 +0000] "GET / HTTP/1.1" 300 266 "-" "kube-probe/1.14"
2020-09-15 11:24:14.355421 2020-09-15 11:24:14.354 8 DEBUG keystone.server.flask.request_processing.req_logging [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] REQUEST_METHOD: `POST` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:27\x1b[00m
2020-09-15 11:24:14.356149 2020-09-15 11:24:14.355 8 DEBUG keystone.server.flask.request_processing.req_logging [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] SCRIPT_NAME: `` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:28\x1b[00m
2020-09-15 11:24:14.356789 2020-09-15 11:24:14.356 8 DEBUG keystone.server.flask.request_processing.req_logging [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] PATH_INFO: `/v3/ec2tokens` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:29\x1b[00m
2020-09-15 11:24:14.406988 2020-09-15 11:24:14.406 8 WARNING keystone.common.fernet_utils [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] key_repository is world readable: /etc/keystone/credential-keys/\x1b[00m
2020-09-15 11:24:14.425123 mod_wsgi (pid=8): Exception occurred processing WSGI script '/var/www/cgi-bin/keystone/keystone-wsgi-public'.
2020-09-15 11:24:14.425209 Traceback (most recent call last):
2020-09-15 11:24:14.425250   File "/usr/lib/python2.7/site-packages/flask/app.py", line 2309, in __call__
2020-09-15 11:24:14.426541     return self.wsgi_app(environ, start_response)
2020-09-15 11:24:14.426598   File "/usr/lib/python2.7/site-packages/werkzeug/contrib/fixers.py", line 152, in __call__
2020-09-15 11:24:14.426940     return self.app(environ, start_response)
2020-09-15 11:24:14.426998   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
2020-09-15 11:24:14.427415     resp = self.call_func(req, *args, **kw)
2020-09-15 11:24:14.427486   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
2020-09-15 11:24:14.427571     return self.func(req, *args, **kwargs)
2020-09-15 11:24:14.427607   File "/usr/lib/python2.7/site-packages/oslo_middleware/base.py", line 131, in __call__
2020-09-15 11:24:14.427874     response = req.get_response(self.application)
2020-09-15 11:24:14.427960   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
2020-09-15 11:24:14.429143     application, catch_exc_info=False)
2020-09-15 11:24:14.429203   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
2020-09-15 11:24:14.429295     app_iter = application(self.environ, start_response)
2020-09-15 11:24:14.429348   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 143, in __call__
2020-09-15 11:24:14.429430     return resp(environ, start_response)
2020-09-15 11:24:14.429467   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
2020-09-15 11:24:14.429511     resp = self.call_func(req, *args, **kw)
2020-09-15 11:24:14.429537   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
2020-09-15 11:24:14.429624     return self.func(req, *args, **kwargs)
2020-09-15 11:24:14.429668   File "/usr/lib/python2.7/site-packages/oslo_middleware/base.py", line 131, in __call__
2020-09-15 11:24:14.429742     response = req.get_response(self.application)
2020-09-15 11:24:14.429786   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
2020-09-15 11:24:14.429861     application, catch_exc_info=False)
2020-09-15 11:24:14.429928   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
2020-09-15 11:24:14.430006     app_iter = application(self.environ, start_response)
2020-09-15 11:24:14.430040   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
2020-09-15 11:24:14.434266     resp = self.call_func(req, *args, **kw)
2020-09-15 11:24:14.434351   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
2020-09-15 11:24:14.434460     return self.func(req, *args, **kwargs)
2020-09-15 11:24:14.434513   File "/usr/lib/python2.7/site-packages/osprofiler/web.py", line 112, in __call__
2020-09-15 11:24:14.434842     return request.get_response(self.application)
2020-09-15 11:24:14.434898   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
2020-09-15 11:24:14.435009     application, catch_exc_info=False)
2020-09-15 11:24:14.435061   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
2020-09-15 11:24:14.435144     app_iter = application(self.environ, start_response)
2020-09-15 11:24:14.435183   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
2020-09-15 11:24:14.435261     resp = self.call_func(req, *args, **kw)
2020-09-15 11:24:14.435298   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
2020-09-15 11:24:14.435378     return self.func(req, *args, **kwargs)
2020-09-15 11:24:14.435429   File "/usr/lib/python2.7/site-packages/oslo_middleware/request_id.py", line 58, in __call__
2020-09-15 11:24:14.435697     response = req.get_response(self.application)
2020-09-15 11:24:14.435748   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
2020-09-15 11:24:14.435822     application, catch_exc_info=False)
2020-09-15 11:24:14.435877   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
2020-09-15 11:24:14.435956     app_iter = application(self.environ, start_response)
2020-09-15 11:24:14.436008   File "/usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/middleware/url_normalize.py", line 38, in __call__
2020-09-15 11:24:14.436228     return self.app(environ, start_response)
2020-09-15 11:24:14.436279   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
2020-09-15 11:24:14.436355     resp = self.call_func(req, *args, **kw)
2020-09-15 11:24:14.436400   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
2020-09-15 11:24:14.436477     return self.func(req, *args, **kwargs)
2020-09-15 11:24:14.436513   File "/usr/lib/python2.7/site-packages/keystonemiddleware/auth_token/__init__.py", line 332, in __call__
2020-09-15 11:24:14.437564     response = req.get_response(self._app)
2020-09-15 11:24:14.437622   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
2020-09-15 11:24:14.437706     application, catch_exc_info=False)
2020-09-15 11:24:14.437755   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
2020-09-15 11:24:14.437832     app_iter = application(self.environ, start_response)
2020-09-15 11:24:14.437882   File "/usr/lib/python2.7/site-packages/werkzeug/wsgi.py", line 826, in __call__
2020-09-15 11:24:14.439175     return app(environ, start_response)
2020-09-15 11:24:14.439233   File "/usr/lib/python2.7/site-packages/flask/app.py", line 2295, in wsgi_app
2020-09-15 11:24:14.439320     response = self.handle_exception(e)
2020-09-15 11:24:14.439367   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440091     return original_handler(e)
2020-09-15 11:24:14.440143   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440228     return original_handler(e)
2020-09-15 11:24:14.440275   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440349     return original_handler(e)
2020-09-15 11:24:14.440396   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440467     return original_handler(e)
2020-09-15 11:24:14.440513   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440587     return original_handler(e)
2020-09-15 11:24:14.440634   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440707     return original_handler(e)
2020-09-15 11:24:14.440754   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440818     return original_handler(e)
2020-09-15 11:24:14.440863   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.440933     return original_handler(e)
2020-09-15 11:24:14.440980   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441051     return original_handler(e)
2020-09-15 11:24:14.441097   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441169     return original_handler(e)
2020-09-15 11:24:14.441214   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441286     return original_handler(e)
2020-09-15 11:24:14.441322   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441391     return original_handler(e)
2020-09-15 11:24:14.441438   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441514     return original_handler(e)
2020-09-15 11:24:14.441549   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441618     return original_handler(e)
2020-09-15 11:24:14.441663   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441733     return original_handler(e)
2020-09-15 11:24:14.441772   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441859     return original_handler(e)
2020-09-15 11:24:14.441903   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.441999     return original_handler(e)
2020-09-15 11:24:14.442039   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.442111     return original_handler(e)
2020-09-15 11:24:14.442237   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.442335     return original_handler(e)
2020-09-15 11:24:14.442390   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.442464     return original_handler(e)
2020-09-15 11:24:14.442508   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.442581     return original_handler(e)
2020-09-15 11:24:14.442622   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.442692     return original_handler(e)
2020-09-15 11:24:14.442729   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.442798     return original_handler(e)
2020-09-15 11:24:14.442844   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.442919     return original_handler(e)
2020-09-15 11:24:14.442956   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.443028     return original_handler(e)
2020-09-15 11:24:14.443074   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.443147     return original_handler(e)
2020-09-15 11:24:14.443194   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.443265     return original_handler(e)
2020-09-15 11:24:14.443313   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.443384     return original_handler(e)
2020-09-15 11:24:14.443431   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.443505     return original_handler(e)
2020-09-15 11:24:14.443542   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.443612     return original_handler(e)
2020-09-15 11:24:14.443659   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1741, in handle_exception
2020-09-15 11:24:14.443734     reraise(exc_type, exc_value, tb)
2020-09-15 11:24:14.443783   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 266, in error_router
2020-09-15 11:24:14.443854     return self.handle_error(e)
2020-09-15 11:24:14.443889   File "/usr/lib/python2.7/site-packages/flask/app.py", line 2292, in wsgi_app
2020-09-15 11:24:14.443960     response = self.full_dispatch_request()
2020-09-15 11:24:14.443996   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
2020-09-15 11:24:14.444064     rv = self.handle_user_exception(e)
2020-09-15 11:24:14.444100   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.444171     return original_handler(e)
2020-09-15 11:24:14.444218   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.444286     return original_handler(e)
2020-09-15 11:24:14.444332   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.444429     return original_handler(e)
2020-09-15 11:24:14.444475   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.444549     return original_handler(e)
2020-09-15 11:24:14.444593   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.444664     return original_handler(e)
2020-09-15 11:24:14.444699   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.444766     return original_handler(e)
2020-09-15 11:24:14.444808   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.444876     return original_handler(e)
2020-09-15 11:24:14.444913   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445027     return original_handler(e)
2020-09-15 11:24:14.445070   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445140     return original_handler(e)
2020-09-15 11:24:14.445182   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445253     return original_handler(e)
2020-09-15 11:24:14.445296   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445361     return original_handler(e)
2020-09-15 11:24:14.445401   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445469     return original_handler(e)
2020-09-15 11:24:14.445511   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445580     return original_handler(e)
2020-09-15 11:24:14.445622   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445692     return original_handler(e)
2020-09-15 11:24:14.445725   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445805     return original_handler(e)
2020-09-15 11:24:14.445850   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.445923     return original_handler(e)
2020-09-15 11:24:14.445957   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.446025     return original_handler(e)
2020-09-15 11:24:14.446066   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.450825     return original_handler(e)
2020-09-15 11:24:14.450900   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.451019     return original_handler(e)
2020-09-15 11:24:14.451071   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.451155     return original_handler(e)
2020-09-15 11:24:14.451201   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.451314     return original_handler(e)
2020-09-15 11:24:14.451361   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.451448     return original_handler(e)
2020-09-15 11:24:14.451488   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.451570     return original_handler(e)
2020-09-15 11:24:14.451607   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.451682     return original_handler(e)
2020-09-15 11:24:14.451976   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.452073     return original_handler(e)
2020-09-15 11:24:14.452110   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.452180     return original_handler(e)
2020-09-15 11:24:14.452217   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.452289     return original_handler(e)
2020-09-15 11:24:14.452332   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.452430     return original_handler(e)
2020-09-15 11:24:14.452486   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.452556     return original_handler(e)
2020-09-15 11:24:14.452607   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
2020-09-15 11:24:14.452679     return original_handler(e)
2020-09-15 11:24:14.452714   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1718, in handle_user_exception
2020-09-15 11:24:14.452793     reraise(exc_type, exc_value, tb)
2020-09-15 11:24:14.452839   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 266, in error_router
2020-09-15 11:24:14.452910     return self.handle_error(e)
2020-09-15 11:24:14.452947   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
2020-09-15 11:24:14.453049     rv = self.dispatch_request()
2020-09-15 11:24:14.453099   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1799, in dispatch_request
2020-09-15 11:24:14.453175     return self.view_functions[rule.endpoint](**req.view_args)
2020-09-15 11:24:14.453216   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 458, in wrapper
2020-09-15 11:24:14.453290     resp = resource(*args, **kwargs)
2020-09-15 11:24:14.453339   File "/usr/lib/python2.7/site-packages/flask/views.py", line 88, in view
2020-09-15 11:24:14.453682     return self.dispatch_request(*args, **kwargs)
2020-09-15 11:24:14.453736   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 573, in dispatch_request
2020-09-15 11:24:14.453816     resp = meth(*args, **kwargs)
2020-09-15 11:24:14.453851   File "/usr/lib/python2.7/site-packages/keystone/server/flask/common.py", line 1058, in wrapper
2020-09-15 11:24:14.454874     return f(*args, **kwargs)
2020-09-15 11:24:14.454932   File "/usr/lib/python2.7/site-packages/keystone/api/ec2tokens.py", line 67, in post
2020-09-15 11:24:14.455263     token = self.handle_authenticate()
2020-09-15 11:24:14.455318   File "/usr/lib/python2.7/site-packages/keystone/api/_shared/EC2_S3_Resource.py", line 93, in handle_authenticate
2020-09-15 11:24:14.455625     self._check_signature(cred_data, credentials)
2020-09-15 11:24:14.455681   File "/usr/lib/python2.7/site-packages/keystone/api/ec2tokens.py", line 45, in _check_signature
2020-09-15 11:24:14.455768     hostname, _port = credentials.split(':')
2020-09-15 11:24:14.455846 AttributeError: 'dict' object has no attribute 'split'
172.18.2.128 - - [15/Sep/2020:11:24:14 +0000] "POST /v3/ec2tokens HTTP/1.1" 500 531 "-" "python-requests/2.21.0"
2020-09-15 11:24:15.227147 2020-09-15 11:24:15.226 11 DEBUG keystone.server.flask.request_processing.req_logging [req-6ee8cf32-cc2a-4cb3-8bd8-c7ed848b90f8 - - - - -] REQUEST_METHOD: `GET` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:27\x1b[00m


I think this is the api code issue, at this line https://github.com/openstack/keystone/blame/master/keystone/api/ec2tokens.py#L45

it should be 
hostname, _port = credentials['host'].split(':')

** Affects: keystone
     Importance: Undecided
         Status: New

-- 
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Engineering Team, which is subscribed to OpenStack Identity (keystone).
https://bugs.launchpad.net/bugs/1895670

Title:
  keystone api v3/ec2tokens return 500

Status in OpenStack Identity (keystone):
  New

Bug description:
  Some heat users still use ec2tokens api for scaling authentication,
  but when heat tried to authenticate through ec2tokens API, it got 500
  error code.

  Here is the keystone api logs
  172.18.3.0 - - [15/Sep/2020:11:24:10 +0000] "GET / HTTP/1.1" 300 266 "-" "kube-probe/1.14"
  2020-09-15 11:24:14.355421 2020-09-15 11:24:14.354 8 DEBUG keystone.server.flask.request_processing.req_logging [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] REQUEST_METHOD: `POST` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:27\x1b[00m
  2020-09-15 11:24:14.356149 2020-09-15 11:24:14.355 8 DEBUG keystone.server.flask.request_processing.req_logging [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] SCRIPT_NAME: `` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:28\x1b[00m
  2020-09-15 11:24:14.356789 2020-09-15 11:24:14.356 8 DEBUG keystone.server.flask.request_processing.req_logging [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] PATH_INFO: `/v3/ec2tokens` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:29\x1b[00m
  2020-09-15 11:24:14.406988 2020-09-15 11:24:14.406 8 WARNING keystone.common.fernet_utils [req-6cf43a75-4c37-4942-ab87-a2b12e10434c - - - - -] key_repository is world readable: /etc/keystone/credential-keys/\x1b[00m
  2020-09-15 11:24:14.425123 mod_wsgi (pid=8): Exception occurred processing WSGI script '/var/www/cgi-bin/keystone/keystone-wsgi-public'.
  2020-09-15 11:24:14.425209 Traceback (most recent call last):
  2020-09-15 11:24:14.425250   File "/usr/lib/python2.7/site-packages/flask/app.py", line 2309, in __call__
  2020-09-15 11:24:14.426541     return self.wsgi_app(environ, start_response)
  2020-09-15 11:24:14.426598   File "/usr/lib/python2.7/site-packages/werkzeug/contrib/fixers.py", line 152, in __call__
  2020-09-15 11:24:14.426940     return self.app(environ, start_response)
  2020-09-15 11:24:14.426998   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
  2020-09-15 11:24:14.427415     resp = self.call_func(req, *args, **kw)
  2020-09-15 11:24:14.427486   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
  2020-09-15 11:24:14.427571     return self.func(req, *args, **kwargs)
  2020-09-15 11:24:14.427607   File "/usr/lib/python2.7/site-packages/oslo_middleware/base.py", line 131, in __call__
  2020-09-15 11:24:14.427874     response = req.get_response(self.application)
  2020-09-15 11:24:14.427960   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
  2020-09-15 11:24:14.429143     application, catch_exc_info=False)
  2020-09-15 11:24:14.429203   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
  2020-09-15 11:24:14.429295     app_iter = application(self.environ, start_response)
  2020-09-15 11:24:14.429348   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 143, in __call__
  2020-09-15 11:24:14.429430     return resp(environ, start_response)
  2020-09-15 11:24:14.429467   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
  2020-09-15 11:24:14.429511     resp = self.call_func(req, *args, **kw)
  2020-09-15 11:24:14.429537   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
  2020-09-15 11:24:14.429624     return self.func(req, *args, **kwargs)
  2020-09-15 11:24:14.429668   File "/usr/lib/python2.7/site-packages/oslo_middleware/base.py", line 131, in __call__
  2020-09-15 11:24:14.429742     response = req.get_response(self.application)
  2020-09-15 11:24:14.429786   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
  2020-09-15 11:24:14.429861     application, catch_exc_info=False)
  2020-09-15 11:24:14.429928   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
  2020-09-15 11:24:14.430006     app_iter = application(self.environ, start_response)
  2020-09-15 11:24:14.430040   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
  2020-09-15 11:24:14.434266     resp = self.call_func(req, *args, **kw)
  2020-09-15 11:24:14.434351   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
  2020-09-15 11:24:14.434460     return self.func(req, *args, **kwargs)
  2020-09-15 11:24:14.434513   File "/usr/lib/python2.7/site-packages/osprofiler/web.py", line 112, in __call__
  2020-09-15 11:24:14.434842     return request.get_response(self.application)
  2020-09-15 11:24:14.434898   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
  2020-09-15 11:24:14.435009     application, catch_exc_info=False)
  2020-09-15 11:24:14.435061   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
  2020-09-15 11:24:14.435144     app_iter = application(self.environ, start_response)
  2020-09-15 11:24:14.435183   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
  2020-09-15 11:24:14.435261     resp = self.call_func(req, *args, **kw)
  2020-09-15 11:24:14.435298   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
  2020-09-15 11:24:14.435378     return self.func(req, *args, **kwargs)
  2020-09-15 11:24:14.435429   File "/usr/lib/python2.7/site-packages/oslo_middleware/request_id.py", line 58, in __call__
  2020-09-15 11:24:14.435697     response = req.get_response(self.application)
  2020-09-15 11:24:14.435748   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
  2020-09-15 11:24:14.435822     application, catch_exc_info=False)
  2020-09-15 11:24:14.435877   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
  2020-09-15 11:24:14.435956     app_iter = application(self.environ, start_response)
  2020-09-15 11:24:14.436008   File "/usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/middleware/url_normalize.py", line 38, in __call__
  2020-09-15 11:24:14.436228     return self.app(environ, start_response)
  2020-09-15 11:24:14.436279   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 129, in __call__
  2020-09-15 11:24:14.436355     resp = self.call_func(req, *args, **kw)
  2020-09-15 11:24:14.436400   File "/usr/lib/python2.7/site-packages/webob/dec.py", line 193, in call_func
  2020-09-15 11:24:14.436477     return self.func(req, *args, **kwargs)
  2020-09-15 11:24:14.436513   File "/usr/lib/python2.7/site-packages/keystonemiddleware/auth_token/__init__.py", line 332, in __call__
  2020-09-15 11:24:14.437564     response = req.get_response(self._app)
  2020-09-15 11:24:14.437622   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1314, in send
  2020-09-15 11:24:14.437706     application, catch_exc_info=False)
  2020-09-15 11:24:14.437755   File "/usr/lib/python2.7/site-packages/webob/request.py", line 1278, in call_application
  2020-09-15 11:24:14.437832     app_iter = application(self.environ, start_response)
  2020-09-15 11:24:14.437882   File "/usr/lib/python2.7/site-packages/werkzeug/wsgi.py", line 826, in __call__
  2020-09-15 11:24:14.439175     return app(environ, start_response)
  2020-09-15 11:24:14.439233   File "/usr/lib/python2.7/site-packages/flask/app.py", line 2295, in wsgi_app
  2020-09-15 11:24:14.439320     response = self.handle_exception(e)
  2020-09-15 11:24:14.439367   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440091     return original_handler(e)
  2020-09-15 11:24:14.440143   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440228     return original_handler(e)
  2020-09-15 11:24:14.440275   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440349     return original_handler(e)
  2020-09-15 11:24:14.440396   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440467     return original_handler(e)
  2020-09-15 11:24:14.440513   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440587     return original_handler(e)
  2020-09-15 11:24:14.440634   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440707     return original_handler(e)
  2020-09-15 11:24:14.440754   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440818     return original_handler(e)
  2020-09-15 11:24:14.440863   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.440933     return original_handler(e)
  2020-09-15 11:24:14.440980   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441051     return original_handler(e)
  2020-09-15 11:24:14.441097   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441169     return original_handler(e)
  2020-09-15 11:24:14.441214   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441286     return original_handler(e)
  2020-09-15 11:24:14.441322   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441391     return original_handler(e)
  2020-09-15 11:24:14.441438   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441514     return original_handler(e)
  2020-09-15 11:24:14.441549   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441618     return original_handler(e)
  2020-09-15 11:24:14.441663   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441733     return original_handler(e)
  2020-09-15 11:24:14.441772   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441859     return original_handler(e)
  2020-09-15 11:24:14.441903   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.441999     return original_handler(e)
  2020-09-15 11:24:14.442039   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.442111     return original_handler(e)
  2020-09-15 11:24:14.442237   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.442335     return original_handler(e)
  2020-09-15 11:24:14.442390   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.442464     return original_handler(e)
  2020-09-15 11:24:14.442508   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.442581     return original_handler(e)
  2020-09-15 11:24:14.442622   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.442692     return original_handler(e)
  2020-09-15 11:24:14.442729   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.442798     return original_handler(e)
  2020-09-15 11:24:14.442844   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.442919     return original_handler(e)
  2020-09-15 11:24:14.442956   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.443028     return original_handler(e)
  2020-09-15 11:24:14.443074   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.443147     return original_handler(e)
  2020-09-15 11:24:14.443194   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.443265     return original_handler(e)
  2020-09-15 11:24:14.443313   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.443384     return original_handler(e)
  2020-09-15 11:24:14.443431   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.443505     return original_handler(e)
  2020-09-15 11:24:14.443542   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.443612     return original_handler(e)
  2020-09-15 11:24:14.443659   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1741, in handle_exception
  2020-09-15 11:24:14.443734     reraise(exc_type, exc_value, tb)
  2020-09-15 11:24:14.443783   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 266, in error_router
  2020-09-15 11:24:14.443854     return self.handle_error(e)
  2020-09-15 11:24:14.443889   File "/usr/lib/python2.7/site-packages/flask/app.py", line 2292, in wsgi_app
  2020-09-15 11:24:14.443960     response = self.full_dispatch_request()
  2020-09-15 11:24:14.443996   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
  2020-09-15 11:24:14.444064     rv = self.handle_user_exception(e)
  2020-09-15 11:24:14.444100   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.444171     return original_handler(e)
  2020-09-15 11:24:14.444218   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.444286     return original_handler(e)
  2020-09-15 11:24:14.444332   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.444429     return original_handler(e)
  2020-09-15 11:24:14.444475   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.444549     return original_handler(e)
  2020-09-15 11:24:14.444593   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.444664     return original_handler(e)
  2020-09-15 11:24:14.444699   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.444766     return original_handler(e)
  2020-09-15 11:24:14.444808   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.444876     return original_handler(e)
  2020-09-15 11:24:14.444913   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445027     return original_handler(e)
  2020-09-15 11:24:14.445070   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445140     return original_handler(e)
  2020-09-15 11:24:14.445182   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445253     return original_handler(e)
  2020-09-15 11:24:14.445296   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445361     return original_handler(e)
  2020-09-15 11:24:14.445401   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445469     return original_handler(e)
  2020-09-15 11:24:14.445511   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445580     return original_handler(e)
  2020-09-15 11:24:14.445622   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445692     return original_handler(e)
  2020-09-15 11:24:14.445725   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445805     return original_handler(e)
  2020-09-15 11:24:14.445850   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.445923     return original_handler(e)
  2020-09-15 11:24:14.445957   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.446025     return original_handler(e)
  2020-09-15 11:24:14.446066   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.450825     return original_handler(e)
  2020-09-15 11:24:14.450900   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.451019     return original_handler(e)
  2020-09-15 11:24:14.451071   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.451155     return original_handler(e)
  2020-09-15 11:24:14.451201   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.451314     return original_handler(e)
  2020-09-15 11:24:14.451361   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.451448     return original_handler(e)
  2020-09-15 11:24:14.451488   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.451570     return original_handler(e)
  2020-09-15 11:24:14.451607   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.451682     return original_handler(e)
  2020-09-15 11:24:14.451976   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.452073     return original_handler(e)
  2020-09-15 11:24:14.452110   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.452180     return original_handler(e)
  2020-09-15 11:24:14.452217   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.452289     return original_handler(e)
  2020-09-15 11:24:14.452332   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.452430     return original_handler(e)
  2020-09-15 11:24:14.452486   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.452556     return original_handler(e)
  2020-09-15 11:24:14.452607   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 269, in error_router
  2020-09-15 11:24:14.452679     return original_handler(e)
  2020-09-15 11:24:14.452714   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1718, in handle_user_exception
  2020-09-15 11:24:14.452793     reraise(exc_type, exc_value, tb)
  2020-09-15 11:24:14.452839   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 266, in error_router
  2020-09-15 11:24:14.452910     return self.handle_error(e)
  2020-09-15 11:24:14.452947   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
  2020-09-15 11:24:14.453049     rv = self.dispatch_request()
  2020-09-15 11:24:14.453099   File "/usr/lib/python2.7/site-packages/flask/app.py", line 1799, in dispatch_request
  2020-09-15 11:24:14.453175     return self.view_functions[rule.endpoint](**req.view_args)
  2020-09-15 11:24:14.453216   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 458, in wrapper
  2020-09-15 11:24:14.453290     resp = resource(*args, **kwargs)
  2020-09-15 11:24:14.453339   File "/usr/lib/python2.7/site-packages/flask/views.py", line 88, in view
  2020-09-15 11:24:14.453682     return self.dispatch_request(*args, **kwargs)
  2020-09-15 11:24:14.453736   File "/usr/lib/python2.7/site-packages/flask_restful/__init__.py", line 573, in dispatch_request
  2020-09-15 11:24:14.453816     resp = meth(*args, **kwargs)
  2020-09-15 11:24:14.453851   File "/usr/lib/python2.7/site-packages/keystone/server/flask/common.py", line 1058, in wrapper
  2020-09-15 11:24:14.454874     return f(*args, **kwargs)
  2020-09-15 11:24:14.454932   File "/usr/lib/python2.7/site-packages/keystone/api/ec2tokens.py", line 67, in post
  2020-09-15 11:24:14.455263     token = self.handle_authenticate()
  2020-09-15 11:24:14.455318   File "/usr/lib/python2.7/site-packages/keystone/api/_shared/EC2_S3_Resource.py", line 93, in handle_authenticate
  2020-09-15 11:24:14.455625     self._check_signature(cred_data, credentials)
  2020-09-15 11:24:14.455681   File "/usr/lib/python2.7/site-packages/keystone/api/ec2tokens.py", line 45, in _check_signature
  2020-09-15 11:24:14.455768     hostname, _port = credentials.split(':')
  2020-09-15 11:24:14.455846 AttributeError: 'dict' object has no attribute 'split'
  172.18.2.128 - - [15/Sep/2020:11:24:14 +0000] "POST /v3/ec2tokens HTTP/1.1" 500 531 "-" "python-requests/2.21.0"
  2020-09-15 11:24:15.227147 2020-09-15 11:24:15.226 11 DEBUG keystone.server.flask.request_processing.req_logging [req-6ee8cf32-cc2a-4cb3-8bd8-c7ed848b90f8 - - - - -] REQUEST_METHOD: `GET` log_request_info /usr/lib/python2.7/site-packages/keystone/server/flask/request_processing/req_logging.py:27\x1b[00m

  
  I think this is the api code issue, at this line https://github.com/openstack/keystone/blame/master/keystone/api/ec2tokens.py#L45

  it should be 
  hostname, _port = credentials['host'].split(':')

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