feat: Setup OTEL separately to make it optional

Author: g3force

adk/README.md

@@ -20,8 +20,13 @@ Basic usage example:
 
 ```python
 from agenticlayer.agent_to_a2a import to_a2a
+from agenticlayer.otel import setup_otel
 
 root_agent = ...  # Your ADK agent here
 
+# Set up OpenTelemetry instrumentation, logging and metrics
+setup_otel()
+
+# Create starlette app with A2A protocol
 app = to_a2a(root_agent)
 ```

adk/agenticlayer/agent_to_a2a.py

@@ -22,7 +22,6 @@
 from starlette.routing import Route
 
 from .callback_tracer_plugin import CallbackTracerPlugin
-from .otel import setup_otel
 
 
 def to_a2a(agent: BaseAgent) -> Starlette:
@@ -43,13 +42,8 @@ def to_a2a(agent: BaseAgent) -> Starlette:
     # Set up ADK logging to ensure logs are visible when using uvicorn directly
     log_level = os.environ.get("LOGLEVEL", "INFO")
     setup_adk_logger(log_level)  # type: ignore
-    # Set log level for urllib to WARNING to reduce noise (like sending logs to OTLP)
-    logging.getLogger("urllib3").setLevel(logging.WARNING)
     logger = logging.getLogger(__name__)
 
-    # Set up OpenTelemetry instrumentation, logging and metrics
-    setup_otel()
-
     async def create_runner() -> Runner:
         """Create a runner for the agent."""
         return Runner(

adk/agenticlayer/otel.py

@@ -18,6 +18,9 @@
 def setup_otel() -> None:
     """Set up OpenTelemetry tracing, logging and metrics."""
 
+    # Set log level for urllib to WARNING to reduce noise (like sending logs to OTLP)
+    logging.getLogger("urllib3").setLevel(logging.WARNING)
+
     # Traces
     _tracer_provider = trace_sdk.TracerProvider()
     _tracer_provider.add_span_processor(SimpleSpanProcessor(OTLPSpanExporter()))