feat: add support for custom service name in logging (#1194)

compose.tracing.yaml

@@ -1,6 +1,7 @@
 services:
   letta_server:
     environment:
+      - ENV_NAME=${ENV_NAME} # optional service name
       - OTEL_EXPORTER_OTLP_ENDPOINT=http://otel-collector:4317
 
   otel-collector:

letta/server/rest_api/app.py

@@ -235,12 +235,14 @@ def create_application() -> "FastAPI":
     endpoint = os.getenv("OTEL_EXPORTER_OTLP_ENDPOINT")
     if endpoint:
         print(f"▶ Using OTLP tracing with endpoint: {endpoint}")
+        env_name_suffix = os.getenv("ENV_NAME")
+        service_name = f"letta-server-{env_name_suffix.lower()}" if env_name_suffix else "letta-server"
         from letta.tracing import setup_tracing
 
         setup_tracing(
             endpoint=endpoint,
             app=app,
-            service_name="memgpt-server",
+            service_name=service_name,
         )
 
     for route in v1_routes: