change

azure_functions_worker/constants.py

@@ -83,14 +83,18 @@
 
 # Appsetting to turn on OpenTelemetry support/features
 # A value of "true" enables the setting, defaults to "false"
-# Includes turning on Azure monitor distro to send telemetry to AppInsights
 PYTHON_ENABLE_OPENTELEMETRY = "PYTHON_ENABLE_OPENTELEMETRY"
 PYTHON_ENABLE_OPENTELEMETRY_DEFAULT = "false"
 
+# Appsetting to turn on ApplicationInsights support/features
+# A value of "true" enables the setting, defaults to "false"
+PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY = "PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY"
+PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY_DEFAULT = "false"
+
 # Appsetting to specify root logger name of logger to collect telemetry for
-# Used by Azure monitor distro
-PYTHON_AZURE_MONITOR_LOGGER_NAME = "PYTHON_AZURE_MONITOR_LOGGER_NAME"
-PYTHON_AZURE_MONITOR_LOGGER_NAME_DEFAULT = ""
+# Used by Azure monitor distro (Application Insights)
+PYTHON_APPLICATIONINSIGHTS_LOGGER_NAME = "PYTHON_APPLICATIONINSIGHTS_LOGGER_NAME"
+PYTHON_APPLICATIONINSIGHTS_LOGGER_NAME_DEFAULT = ""
 
 # Appsetting to specify AppInsights connection string
 APPLICATIONINSIGHTS_CONNECTION_STRING = "APPLICATIONINSIGHTS_CONNECTION_STRING"

azure_functions_worker/dispatcher.py

@@ -26,12 +26,12 @@
     APPLICATIONINSIGHTS_CONNECTION_STRING,
     HTTP_URI,
     METADATA_PROPERTIES_WORKER_INDEXED,
-    PYTHON_AZURE_MONITOR_LOGGER_NAME,
-    PYTHON_AZURE_MONITOR_LOGGER_NAME_DEFAULT,
+    PYTHON_APPLICATIONINSIGHTS_LOGGER_NAME,
+    PYTHON_APPLICATIONINSIGHTS_LOGGER_NAME_DEFAULT,
     PYTHON_ENABLE_DEBUG_LOGGING,
     PYTHON_ENABLE_INIT_INDEXING,
-    PYTHON_ENABLE_OPENTELEMETRY,
-    PYTHON_ENABLE_OPENTELEMETRY_DEFAULT,
+    PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY,
+    PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY_DEFAULT,
     PYTHON_LANGUAGE_RUNTIME,
     PYTHON_ROLLBACK_CWD_PATH,
     PYTHON_SCRIPT_FILE_NAME,
@@ -103,8 +103,10 @@ def __init__(self, loop: BaseEventLoop, host: str, port: int,
         self._function_metadata_result = None
         self._function_metadata_exception = None
 
-        # Used for checking if open telemetry is enabled
+        # Used for checking if appinsights is enabled
         self._azure_monitor_available = False
+        # Used for checking if open telemetry is enabled
+        self._otel_libs_available = False
         self._context_api = None
         self._trace_context_propagator = None
 
@@ -318,8 +320,8 @@ def initialize_azure_monitor(self):
                     setting=APPLICATIONINSIGHTS_CONNECTION_STRING
                 ),
                 logger_name=get_app_setting(
-                    setting=PYTHON_AZURE_MONITOR_LOGGER_NAME,
-                    default_value=PYTHON_AZURE_MONITOR_LOGGER_NAME_DEFAULT
+                    setting=PYTHON_APPLICATIONINSIGHTS_LOGGER_NAME,
+                    default_value=PYTHON_APPLICATIONINSIGHTS_LOGGER_NAME_DEFAULT
                 ),
             )
             self._azure_monitor_available = True
@@ -381,15 +383,16 @@ async def _handle__worker_init_request(self, request):
             constants.RPC_HTTP_TRIGGER_METADATA_REMOVED: _TRUE,
             constants.SHARED_MEMORY_DATA_TRANSFER: _TRUE,
         }
+
         opentelemetry_app_setting = get_app_setting(
-            setting=PYTHON_ENABLE_OPENTELEMETRY,
-            default_value=PYTHON_ENABLE_OPENTELEMETRY_DEFAULT,
+            setting=PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY,
+            default_value=PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY_DEFAULT,
         )
         if opentelemetry_app_setting and  opentelemetry_app_setting.lower() == "true":
             self.initialize_azure_monitor()
 
-            if self._azure_monitor_available:
-                capabilities[constants.WORKER_OPEN_TELEMETRY_ENABLED] = _TRUE
+        if self._azure_monitor_available or self._otel_libs_available:
+            capabilities[constants.WORKER_OPEN_TELEMETRY_ENABLED] = _TRUE
 
         if DependencyManager.should_load_cx_dependencies():
             DependencyManager.prioritize_customer_dependencies()
@@ -665,7 +668,7 @@ async def _handle__invocation_request(self, request):
                     args[name] = bindings.Out()
 
             if fi.is_async:
-                if self._azure_monitor_available:
+                if self._azure_monitor_available or self._otel_libs_available:
                     self.configure_opentelemetry(fi_context)
 
                 call_result = \
@@ -783,13 +786,13 @@ async def _handle__function_environment_reload_request(self, request):
 
             capabilities = {}
             if get_app_setting(
-                    setting=PYTHON_ENABLE_OPENTELEMETRY,
-                    default_value=PYTHON_ENABLE_OPENTELEMETRY_DEFAULT):
+                    setting=PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY,
+                    default_value=PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY_DEFAULT):
                 self.initialize_azure_monitor()
 
-                if self._azure_monitor_available:
-                    capabilities[constants.WORKER_OPEN_TELEMETRY_ENABLED] = (
-                        _TRUE)
+            if self._azure_monitor_available or self._otel_libs_available:
+                capabilities[constants.WORKER_OPEN_TELEMETRY_ENABLED] = (
+                    _TRUE)
 
             if is_envvar_true(PYTHON_ENABLE_INIT_INDEXING):
                 try:
@@ -999,7 +1002,7 @@ def _run_sync_func(self, invocation_id, context, func, params):
         # invocation_id from ThreadPoolExecutor's threads.
         context.thread_local_storage.invocation_id = invocation_id
         try:
-            if self._azure_monitor_available:
+            if self._azure_monitor_available or self._otel_libs_available:
                 self.configure_opentelemetry(context)
             return ExtensionManager.get_sync_invocation_wrapper(context,
                                                                 func)(params)

azure_functions_worker/utils/app_setting_manager.py

@@ -7,6 +7,7 @@
     FUNCTIONS_WORKER_SHARED_MEMORY_DATA_TRANSFER_ENABLED,
     PYTHON_ENABLE_DEBUG_LOGGING,
     PYTHON_ENABLE_INIT_INDEXING,
+    PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY,
     PYTHON_ENABLE_OPENTELEMETRY,
     PYTHON_ENABLE_WORKER_EXTENSIONS,
     PYTHON_ENABLE_WORKER_EXTENSIONS_DEFAULT,
@@ -29,7 +30,8 @@ def get_python_appsetting_state():
          FUNCTIONS_WORKER_SHARED_MEMORY_DATA_TRANSFER_ENABLED,
          PYTHON_SCRIPT_FILE_NAME,
          PYTHON_ENABLE_INIT_INDEXING,
-         PYTHON_ENABLE_OPENTELEMETRY]
+         PYTHON_ENABLE_OPENTELEMETRY,
+         PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY]
 
     app_setting_states = "".join(
         f"{app_setting}: {current_vars[app_setting]} | "

tests/unittests/test_opentelemetry.py

@@ -23,8 +23,9 @@ def test_update_opentelemetry_status_import_error(self):
         # Patch the built-in import mechanism
         with patch('builtins.__import__', side_effect=ImportError):
             self.dispatcher.update_opentelemetry_status()
-            # Verify that otel_libs_available is set to False due to ImportError
-            self.assertFalse(self.dispatcher._azure_monitor_available)
+            # Verify that context variables are None due to ImportError
+            self.assertIsNone(self.dispatcher._context_api)
+            self.assertIsNone(self.dispatcher._trace_context_propagator)
 
     @patch('builtins.__import__')
     def test_update_opentelemetry_status_success(
@@ -54,12 +55,12 @@ def test_initialize_azure_monitor_import_error(
         with patch('builtins.__import__', side_effect=ImportError):
             self.dispatcher.initialize_azure_monitor()
             mock_update_ot.assert_called_once()
-            # Verify that otel_libs_available is set to False due to ImportError
+            # Verify that azure_monitor_available is set to False due to ImportError
             self.assertFalse(self.dispatcher._azure_monitor_available)
 
-    @patch.dict(os.environ, {'PYTHON_ENABLE_OPENTELEMETRY': 'true'})
+    @patch.dict(os.environ, {'PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY': 'true'})
     @patch('builtins.__import__')
-    def test_init_request_otel_capability_enabled_app_setting(
+    def test_init_request_initialize_azure_monitor_enabled_app_setting(
             self,
             mock_imports,
     ):
@@ -78,13 +79,15 @@ def test_init_request_otel_capability_enabled_app_setting(
         self.assertEqual(init_response.worker_init_response.result.status,
                          protos.StatusResult.Success)
 
+        # Verify azure_monitor_available is set to True
+        self.assertTrue(self.dispatcher._azure_monitor_available)
         # Verify that WorkerOpenTelemetryEnabled capability is set to _TRUE
         capabilities = init_response.worker_init_response.capabilities
         self.assertIn("WorkerOpenTelemetryEnabled", capabilities)
         self.assertEqual(capabilities["WorkerOpenTelemetryEnabled"], "true")
 
     @patch("azure_functions_worker.dispatcher.Dispatcher.initialize_azure_monitor")
-    def test_init_request_otel_capability_default_app_setting(
+    def test_init_request_initialize_azure_monitor_default_app_setting(
         self,
         mock_initialize_azmon,
     ):
@@ -103,15 +106,18 @@ def test_init_request_otel_capability_default_app_setting(
                          protos.StatusResult.Success)
 
         # Azure monitor initialized not called
+        # Since default behavior is not enabled
         mock_initialize_azmon.assert_not_called()
 
+        # Verify azure_monitor_available is set to False
+        self.assertFalse(self.dispatcher._azure_monitor_available)
         # Verify that WorkerOpenTelemetryEnabled capability is not set
         capabilities = init_response.worker_init_response.capabilities
         self.assertNotIn("WorkerOpenTelemetryEnabled", capabilities)
 
-    @patch.dict(os.environ, {'PYTHON_ENABLE_OPENTELEMETRY': 'false'})
+    @patch.dict(os.environ, {'PYTHON_APPLICATIONINSIGHTS_ENABLE_TELEMETRY': 'false'})
     @patch("azure_functions_worker.dispatcher.Dispatcher.initialize_azure_monitor")
-    def test_init_request_otel_capability_disabled_app_setting(
+    def test_init_request_initialize_azure_monitor_disabled_app_setting(
         self,
         mock_initialize_azmon,
     ):
@@ -132,6 +138,8 @@ def test_init_request_otel_capability_disabled_app_setting(
         # Azure monitor initialized not called
         mock_initialize_azmon.assert_not_called()
 
+        # Verify azure_monitor_available is set to False
+        self.assertFalse(self.dispatcher._azure_monitor_available)
         # Verify that WorkerOpenTelemetryEnabled capability is not set
         capabilities = init_response.worker_init_response.capabilities
         self.assertNotIn("WorkerOpenTelemetryEnabled", capabilities)