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[Slawek Kaplonski <1742797@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

It looks that connection to ovsdb is not mocked in test:

neutron.tests.unit.services.logapi.agent.test_log_extension.LoggingExtensionTestCase.test_handle_port_vm

and that cause problem with UT when openvswitch is not installed on
host:


Captured traceback:
~~~~~~~~~~~~~~~~~~~
    Traceback (most recent call last):
      File "neutron/tests/unit/services/logapi/agent/test_log_extension.py", line 68, in setUp
        super(LoggingExtensionTestCase, self).setUp()
      File "neutron/tests/unit/services/logapi/agent/test_log_extension.py", line 58, in setUp
        ovs_bridge.OVSAgentBridge('br-int'),
      File "neutron/plugins/ml2/drivers/openvswitch/agent/openflow/br_cookie.py", line 27, in __init__
        super(OVSBridgeCookieMixin, self).__init__(*args, **kwargs)
      File "neutron/agent/common/ovs_lib.py", line 213, in __init__
        super(OVSBridge, self).__init__()
      File "neutron/agent/common/ovs_lib.py", line 113, in __init__
        self.ovsdb = ovsdb_api.from_config(self)
      File "neutron/agent/ovsdb/api.py", line 40, in from_config
        return iface.api_factory(context)
      File "neutron/agent/ovsdb/impl_idl.py", line 47, in api_factory
        idl=n_connection.idl_factory(),
      File "neutron/agent/ovsdb/native/connection.py", line 43, in idl_factory
        helper = do_get_schema_helper()
      File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 214, in wrapped_f
        return self.call(f, *args, **kw)
      File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 295, in call
        start_time=start_time)
      File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 265, in iter
        raise RetryError(fut).reraise()
      File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 344, in reraise
        raise self.last_attempt.result()
      File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/concurrent/futures/_base.py", line 455, in result
        return self.__get_result()
      File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 298, in call
        result = fn(*args, **kwargs)
      File "neutron/agent/ovsdb/native/connection.py", line 41, in do_get_schema_helper
        return idlutils.get_schema_helper(conn, schema_name)
      File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/ovsdbapp/backend/ovs_idl/idlutils.py", line 128, in get_schema_helper
        'err': os.strerror(err)})
    Exception: Could not retrieve schema from tcp:127.0.0.1:6640: Connection refused

** Affects: neutron
     Importance: Medium
         Status: Confirmed


** Tags: logging ovs unittest

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https://bugs.launchpad.net/bugs/1742797

Title:
  Connection to ovsdb not mocked properly

Status in neutron:
  Confirmed

Bug description:
  It looks that connection to ovsdb is not mocked in test:

  neutron.tests.unit.services.logapi.agent.test_log_extension.LoggingExtensionTestCase.test_handle_port_vm

  and that cause problem with UT when openvswitch is not installed on
  host:

  
  Captured traceback:
  ~~~~~~~~~~~~~~~~~~~
      Traceback (most recent call last):
        File "neutron/tests/unit/services/logapi/agent/test_log_extension.py", line 68, in setUp
          super(LoggingExtensionTestCase, self).setUp()
        File "neutron/tests/unit/services/logapi/agent/test_log_extension.py", line 58, in setUp
          ovs_bridge.OVSAgentBridge('br-int'),
        File "neutron/plugins/ml2/drivers/openvswitch/agent/openflow/br_cookie.py", line 27, in __init__
          super(OVSBridgeCookieMixin, self).__init__(*args, **kwargs)
        File "neutron/agent/common/ovs_lib.py", line 213, in __init__
          super(OVSBridge, self).__init__()
        File "neutron/agent/common/ovs_lib.py", line 113, in __init__
          self.ovsdb = ovsdb_api.from_config(self)
        File "neutron/agent/ovsdb/api.py", line 40, in from_config
          return iface.api_factory(context)
        File "neutron/agent/ovsdb/impl_idl.py", line 47, in api_factory
          idl=n_connection.idl_factory(),
        File "neutron/agent/ovsdb/native/connection.py", line 43, in idl_factory
          helper = do_get_schema_helper()
        File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 214, in wrapped_f
          return self.call(f, *args, **kw)
        File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 295, in call
          start_time=start_time)
        File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 265, in iter
          raise RetryError(fut).reraise()
        File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 344, in reraise
          raise self.last_attempt.result()
        File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/concurrent/futures/_base.py", line 455, in result
          return self.__get_result()
        File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/tenacity/__init__.py", line 298, in call
          result = fn(*args, **kwargs)
        File "neutron/agent/ovsdb/native/connection.py", line 41, in do_get_schema_helper
          return idlutils.get_schema_helper(conn, schema_name)
        File "/home/ubuntu/neutron/.tox/py27/local/lib/python2.7/site-packages/ovsdbapp/backend/ovs_idl/idlutils.py", line 128, in get_schema_helper
          'err': os.strerror(err)})
      Exception: Could not retrieve schema from tcp:127.0.0.1:6640: Connection refused

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