==> /var/log/monasca/agent/forwarder.stderr.log <==
2017-10-05 16:04:57,569 | ERROR | forwarder | monasca_agent.forwarder.api.monasca_api(monasca_api.py:145) | Error sending message to Monasca API.
Traceback (most recent call last):
  File "/opt/monasca-agent/lib/python2.7/site-packages/monasca_agent/forwarder/api/monasca_api.py", line 137, in _send_message
    self._mon_client.metrics.create(**kwargs)
  File "/opt/monasca-agent/lib/python2.7/site-packages/monascaclient/v2_0/metrics.py", line 31, in create
    body = self.client.create(url=url_str, json=data)
  File "/opt/monasca-agent/lib/python2.7/site-packages/osc_lib/api/api.py", line 164, in create
    ret = self._request(method, url, session=session, **params)
  File "/opt/monasca-agent/lib/python2.7/site-packages/osc_lib/api/api.py", line 141, in _request
    return session.request(url, method, **kwargs)
  File "/opt/monasca-agent/lib/python2.7/site-packages/keystoneauth1/session.py", line 737, in request
    raise exceptions.from_response(resp, method, url)
Forbidden: Forbidden (HTTP 403) (Request-ID: req-eecd1ef1-6c90-4f94-9b60-af5ea173a5a3)