Improve metrics

services/demo_session/app/main.py

@@ -15,6 +15,7 @@ from app.api import demo_sessions, demo_accounts, demo_operations, internal
 from shared.redis_utils import initialize_redis, close_redis
 from shared.monitoring.logging import setup_logging
 from shared.monitoring.metrics import MetricsCollector, add_metrics_middleware
+from shared.monitoring.system_metrics import SystemMetricsCollector
 
 # OpenTelemetry imports
 from opentelemetry import trace
@@ -69,9 +70,12 @@ async def lifespan(app: FastAPI):
         max_connections=50
     )
 
-    # Start metrics server
-    metrics_collector.start_metrics_server(8080)
-    logger.info("Metrics server started on port 8080")
+    # Initialize system metrics collection
+    system_metrics = SystemMetricsCollector("demo-session")
+    logger.info("System metrics collection started")
+
+    # Note: Metrics are exported via OpenTelemetry OTLP to SigNoz - no metrics server needed
+    logger.info("Metrics export configured via OpenTelemetry OTLP")
 
     logger.info("Demo Session Service started successfully")
 
@@ -164,13 +168,8 @@ async def health():
     }
 
 
-@app.get("/metrics")
-async def metrics():
-    """Prometheus metrics endpoint"""
-    return Response(
-        content=metrics_collector.get_metrics(),
-        media_type="text/plain; version=0.0.4; charset=utf-8"
-    )
+# Note: Metrics are exported via OpenTelemetry OTLP to SigNoz
+# The /metrics endpoint is not needed as metrics are pushed automatically
 
 
 if __name__ == "__main__":