Device/Monitoring component:

- device: added environemnt variable to prevent loading drivers other than emulated
- monitoring: set environment variable to force loading only emulated driver during unitary tests of monitoring

src/device/service/drivers/__init__.py

@@ -12,15 +12,18 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import os
 from common.DeviceTypes import DeviceTypeEnum
 from ..driver_api.FilterFields import FilterFieldEnum, ORM_DeviceDriverEnum
-from .emulated.EmulatedDriver import EmulatedDriver
-from .openconfig.OpenConfigDriver import OpenConfigDriver
-from .transport_api.TransportApiDriver import TransportApiDriver
-from .p4.p4_driver import P4Driver
-from .microwave.IETFApiDriver import IETFApiDriver
 
-DRIVERS = [
+TRUE_VALUES = {'T', 'TRUE', 'YES', '1'}
+DEVICE_EMULATED_ONLY = os.environ.get('DEVICE_EMULATED_ONLY')
+LOAD_ALL_DEVICE_DRIVERS = (DEVICE_EMULATED_ONLY is None) or (DEVICE_EMULATED_ONLY.upper() not in TRUE_VALUES)
+
+DRIVERS = []
+
+from .emulated.EmulatedDriver import EmulatedDriver # pylint: disable=wrong-import-position
+DRIVERS.append(
     (EmulatedDriver, [
         {
             # Driver==unspecified & no device type specified => use Emulated
@@ -38,32 +41,47 @@ DRIVERS = [
                 ORM_DeviceDriverEnum.TRANSPORT_API
             ],
         }
-    ]),
-    (OpenConfigDriver, [
-        {
-            # Real Packet Router, specifying OpenConfig Driver => use OpenConfigDriver
-            FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.PACKET_ROUTER,
-            FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.OPENCONFIG,
-        }
-    ]),
-    (TransportApiDriver, [
-        {
-            # Real OLS, specifying TAPI Driver => use TransportApiDriver
-            FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.OPEN_LINE_SYSTEM,
-            FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.TRANSPORT_API,
-        }
-    ]),
-    (P4Driver, [
-        {
-            # Real P4 Switch, specifying P4 Driver => use P4Driver
-            FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.P4_SWITCH,
-            FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.P4,
-        }
-    ]),
-    (IETFApiDriver, [
-        {
-            FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.MICROVAWE_RADIO_SYSTEM,
-            FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.IETF_NETWORK_TOPOLOGY,
-        }
-    ]),
-]
+    ]))
+
+if LOAD_ALL_DEVICE_DRIVERS:
+    from .openconfig.OpenConfigDriver import OpenConfigDriver # pylint: disable=wrong-import-position
+    DRIVERS.append(
+        (OpenConfigDriver, [
+            {
+                # Real Packet Router, specifying OpenConfig Driver => use OpenConfigDriver
+                FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.PACKET_ROUTER,
+                FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.OPENCONFIG,
+            }
+        ]))
+
+if LOAD_ALL_DEVICE_DRIVERS:
+    from .transport_api.TransportApiDriver import TransportApiDriver # pylint: disable=wrong-import-position
+    DRIVERS.append(
+        (TransportApiDriver, [
+            {
+                # Real OLS, specifying TAPI Driver => use TransportApiDriver
+                FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.OPTICAL_LINE_SYSTEM,
+                FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.TRANSPORT_API,
+            }
+        ]))
+
+if LOAD_ALL_DEVICE_DRIVERS:
+    from .p4.p4_driver import P4Driver # pylint: disable=wrong-import-position
+    DRIVERS.append(
+        (P4Driver, [
+            {
+                # Real P4 Switch, specifying P4 Driver => use P4Driver
+                FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.P4_SWITCH,
+                FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.P4,
+            }
+        ]))
+
+if LOAD_ALL_DEVICE_DRIVERS:
+    from .microwave.IETFApiDriver import IETFApiDriver # pylint: disable=wrong-import-position
+    DRIVERS.append(
+        (IETFApiDriver, [
+            {
+                FilterFieldEnum.DEVICE_TYPE: DeviceTypeEnum.MICROVAWE_RADIO_SYSTEM,
+                FilterFieldEnum.DRIVER     : ORM_DeviceDriverEnum.IETF_NETWORK_TOPOLOGY,
+            }
+        ]))

src/monitoring/requirements.in

@@ -5,10 +5,10 @@ fastcache==1.1.0
 #opencensus[stackdriver]
 #google-cloud-profiler
 #numpy
-Jinja2==3.0.3
-ncclient==0.6.13
-p4runtime==1.3.0
-paramiko==2.9.2
+#Jinja2==3.0.3
+#ncclient==0.6.13
+#p4runtime==1.3.0
+#paramiko==2.9.2
 influx-line-protocol==0.1.4
 python-dateutil==2.8.2
 python-json-logger==2.0.2

src/monitoring/tests/test_unitary.py

@@ -32,8 +32,11 @@ from device.client.DeviceClient import DeviceClient
 from device.service.DeviceService import DeviceService
 from device.service.driver_api.DriverFactory import DriverFactory
 from device.service.driver_api.DriverInstanceCache import DriverInstanceCache
-from device.service.drivers import DRIVERS
 
+os.environ['DEVICE_EMULATED_ONLY'] = 'TRUE'
+from device.service.drivers import DRIVERS  # pylint: disable=wrong-import-position
+
+# pylint: disable=wrong-import-position
 from monitoring.client.MonitoringClient import MonitoringClient
 from common.proto import context_pb2, monitoring_pb2
 from common.proto.kpi_sample_types_pb2 import KpiSampleType