Improve metrics

gateway/app/main.py

@@ -28,6 +28,7 @@ from app.middleware.read_only_mode import ReadOnlyModeMiddleware
 from app.routes import auth, tenant, notification, nominatim, subscription, demo, pos, geocoding, poi_context
 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
@@ -200,7 +201,12 @@ async def startup_event():
     
     logger.info("Metrics registered successfully")
     
-    metrics_collector.start_metrics_server(8080)
+    # Note: Metrics are exported via OpenTelemetry OTLP to SigNoz - no metrics server needed
+    # Initialize system metrics collection
+    system_metrics = SystemMetricsCollector("gateway")
+    logger.info("System metrics collection started")
+
+    logger.info("Metrics export configured via OpenTelemetry OTLP")
     
     logger.info("API Gateway started successfully")
 
@@ -227,13 +233,8 @@ async def health_check():
         "timestamp": time.time()
     }
 
-@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
 
 # ================================================================
 # SERVER-SENT EVENTS (SSE) HELPER FUNCTIONS