unable to list magnum service

[moose]

i followed this tutorial to install magnum(http://docs.openstack.org/project-install-guide/container-infrastructure-management/newton/install-rdo.html), but when i list magnum service(> magnum service-list), it shows:

DEBUG (session:337) REQ: curl -g -i -X GET http://controller:9511/v1/mservices -H "OpenStack-API-Version: container-infra latest" -H "X-Auth-Token: {SHA1}7b1dad82d80be1a47944b2468b1b340ded821c34" -H "Content-Type: application/json" -H "Accept: application/json" -H "User-Agent: None"
INFO (connectionpool:213) Starting new HTTP connection (1): controller
DEBUG (connectionpool:395) "GET /v1/mservices HTTP/1.1" 500 59
DEBUG (session:366) RESP: [500] Date: Mon, 07 Nov 2016 03:10:18 GMT Server: WSGIServer/0.1 Python/2.7.5 Content-Type: text/plain Content-Length: 59
RESP BODY: A server error occurred. Please contact the administrator.

DEBUG (shell:694) Internal Server Error (HTTP 500)
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/magnumclient/shell.py", line 691, in main
    OpenStackMagnumShell().main(map(encodeutils.safe_decode, sys.argv[1:]))
  File "/usr/lib/python2.7/site-packages/magnumclient/shell.py", line 633, in main
    args.func(self.cs, args)
  File "/usr/lib/python2.7/site-packages/magnumclient/v1/mservices_shell.py", line 22, in do_service_list
    mservices = cs.mservices.list()
  File "/usr/lib/python2.7/site-packages/magnumclient/v1/mservices.py", line 68, in list
    return self._list(self._path(path), "mservices")
  File "/usr/lib/python2.7/site-packages/magnumclient/common/base.py", line 121, in _list
    resp, body = self.api.json_request('GET', url)
  File "/usr/lib/python2.7/site-packages/magnumclient/common/httpclient.py", line 366, in json_request
    resp = self._http_request(url, method, **kwargs)
  File "/usr/lib/python2.7/site-packages/magnumclient/common/httpclient.py", line 350, in _http_request
    error_json.get('debuginfo'), method, url)
InternalServerError: Internal Server Error (HTTP 500)
ERROR: Internal Server Error (HTTP 500)

does anyone knowns why ?

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[root@controller ~]# cat magnum.conf
[DEFAULT]

[api]
host = controller

[barbican_client]

[certificates]
cert_manager_type = x509keypair

[cinder_client]
region_name = RegionOne

[cluster]

[cluster_heat]

[cluster_template]

[conductor]

[cors]

[cors.subdomain]

[database]
connection = mysql+pymysql://magnum:MAGNUM_DBPASS@controller/magnum

[docker]

[docker_registry]

[glance_client]

[heat_client]

[keystone_auth]

[keystone_authtoken]
memcached_servers = controller:11211
auth_version = v3
auth_uri = http://controller:5000/v3
project_domain_id = default
project_name = service
user_domain_id = default
password = magnum
username = magnum
auth_url = http://controller:35357
auth_type = password

[magnum_client]

[matchmaker_redis]

[neutron_client]

[nova_client]

[oslo_concurrency]
lock_path = /var/lib/magnum/tmp

[oslo_messaging_amqp]

[oslo_messaging_notifications]
driver = messaging

[oslo_messaging_rabbit]
rabbit_host = controller
rabbit_userid = openstack
rabbit_password = rabbit

[oslo_policy]

[trust]
trustee_domain_name = magnum
trustee_domain_admin_name = magnum_domain_admin
trustee_domain_admin_password = magnum_domain

[x509]

[yatin (yatinkarel)]

@moose, can you share magnum-api logs and your magnum.conf, may be then it can be understood the reason of error.