Fix FastAPI otel issue

Author: pamelafox

function/__init__.py

@@ -1,20 +1,3 @@
-import os
-
-from azure.monitor.opentelemetry.exporter import AzureMonitorTraceExporter
-from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
-from opentelemetry.sdk.resources import SERVICE_NAME, Resource
-from opentelemetry.sdk.trace import TracerProvider
-from opentelemetry.sdk.trace.export import BatchSpanProcessor
-
 from .fastapi_app import create_app
 
 fastapi_app = create_app()
-
-
-@fastapi_app.on_event("startup")
-async def startup_event():
-    if conn_str := os.getenv("APPLICATIONINSIGHTS_CONNECTION_STRING"):
-        exporter = AzureMonitorTraceExporter.from_connection_string(conn_str)
-        tracer = TracerProvider(resource=Resource({SERVICE_NAME: "api"}))
-        tracer.add_span_processor(BatchSpanProcessor(exporter))
-        FastAPIInstrumentor.instrument_app(fastapi_app, tracer_provider=tracer)

function/fastapi_app.py

@@ -1,9 +1,23 @@
+import os
+
 import fastapi
+from azure.monitor.opentelemetry.exporter import AzureMonitorTraceExporter
+from opentelemetry.instrumentation.fastapi import FastAPIInstrumentor
+from opentelemetry.sdk.resources import SERVICE_NAME, Resource
+from opentelemetry.sdk.trace import TracerProvider
+from opentelemetry.sdk.trace.export import BatchSpanProcessor
 
 from . import fastapi_routes
 
 
 def create_app():
     app = fastapi.FastAPI(docs_url="/")
+    if conn_str := os.getenv("APPLICATIONINSIGHTS_CONNECTION_STRING"):
+        exporter = AzureMonitorTraceExporter.from_connection_string(conn_str)
+        tracer = TracerProvider(resource=Resource({SERVICE_NAME: "api"}))
+        tracer.add_span_processor(BatchSpanProcessor(exporter))
+        FastAPIInstrumentor.instrument_app(app, tracer_provider=tracer)
+
     app.include_router(fastapi_routes.router)
+
     return app

requirements.txt

@@ -7,5 +7,5 @@ py-staticmaps==0.4.0
 fastapi==0.110.0
 Pillow==9.5.0
 nest-asyncio==1.6.0
-opentelemetry-instrumentation-fastapi==0.39b0
-azure-monitor-opentelemetry-exporter==1.0.0b14
+opentelemetry-instrumentation-fastapi==0.45b0
+azure-monitor-opentelemetry-exporter==1.0.0b24