feat: add otel system metrics instrumentation (open-webui#22265)

Author: ashm-dev

backend/open_webui/utils/telemetry/instrumentors.py

@@ -20,6 +20,7 @@
 from opentelemetry.instrumentation.requests import RequestsInstrumentor
 from opentelemetry.instrumentation.sqlalchemy import SQLAlchemyInstrumentor
 from opentelemetry.instrumentation.aiohttp_client import AioHttpClientInstrumentor
+from opentelemetry.instrumentation.system_metrics import SystemMetricsInstrumentor
 from opentelemetry.trace import Span, StatusCode
 from redis import Redis
 from redis.cluster import RedisCluster
@@ -204,6 +205,7 @@ def _instrument(self, **kwargs):
             request_hook=aiohttp_request_hook,
             response_hook=aiohttp_response_hook,
         )
+        SystemMetricsInstrumentor().instrument()
 
     def _uninstrument(self, **kwargs):
         if getattr(self, "instrumentors", None) is None:

backend/requirements.txt

@@ -155,3 +155,4 @@ opentelemetry-instrumentation-requests==0.60b1
 opentelemetry-instrumentation-logging==0.60b1
 opentelemetry-instrumentation-httpx==0.60b1
 opentelemetry-instrumentation-aiohttp-client==0.60b1
+opentelemetry-instrumentation-system-metrics==0.60b1