Metrics back front

backend/Dockerfile

@@ -13,6 +13,7 @@ COPY app/pyproject.toml app/poetry.lock* /code/
 
 # Allow installing dev dependencies to run tests
 ARG INSTALL_DEV=true
+RUN bash -c "poetry lock"
 RUN bash -c "if [ $INSTALL_DEV == 'true' ] ; then poetry install --with dev --no-root ; else poetry install --no-root --no-dev ; fi"
 
 ENV PYTHONPATH=/code

backend/app/app/main.py

@@ -17,6 +17,7 @@
 from langchain.globals import set_llm_cache
 from pydantic import ValidationError
 from starlette.middleware.cors import CORSMiddleware
+from prometheus_fastapi_instrumentator import Instrumentator
 
 from app.api.deps import get_redis_client, get_redis_client_sync
 from app.api.v1.api import api_router as api_router_v1
@@ -156,3 +157,5 @@ async def root() -> Dict[str, str]:
     prefix=settings.API_V1_STR,
 )
 add_pagination(app)
+
+Instrumentator().instrument(app).expose(app, endpoint="/metrics")

backend/metrics.py → backend/app/app/metrics.py

@@ -14,5 +14,11 @@
 def metrics():
     """
     Expose toutes les métriques au format Prometheus.
+    Gère les erreurs et retourne un message approprié en cas d'échec.
     """
-    return Response(generate_latest(), media_type=CONTENT_TYPE_LATEST)
+    try:
+        metrics_data = generate_latest()
+        return Response(metrics_data, media_type=CONTENT_TYPE_LATEST)
+    except Exception as e:
+        error_message = f"Erreur lors de la récupération des métriques: {str(e)}"
+        return Response(error_message, media_type="text/plain", status_code=500)

backend/app/pyproject.toml

@@ -72,6 +72,7 @@ watchfiles = "^0.18.1"
 wheel = "^0.40.0"
 isort = "^5.13.2"
 greenlet = "^2.0.2"
+prometheus-fastapi-instrumentator = "^7.0.2"
 python-dotenv = "^1.0.1"
 
 [tool.poetry.group.dev]

frontend/package.json

@@ -45,6 +45,8 @@
     "next-auth": "^4.24.5",
     "next-pwa": "^5.6.0",
     "next-themes": "^0.2.1",
+    "prom-client": "11.5.3",
+    "plotly.js-dist-min": "^2.27.1",
     "prisma": "^4.14.1",
     "react": "18.2.0",
     "react-avatar": "^5.0.3",

frontend/src/pages/api/metrics.ts

@@ -0,0 +1,15 @@
+import client from "prom-client"
+import type { NextApiRequest, NextApiResponse } from "next"
+
+const register = new client.Registry()
+client.collectDefaultMetrics({ register })
+
+export default async function handler(_: NextApiRequest, res: NextApiResponse) {
+  try {
+    res.setHeader("Content-Type", register.contentType)
+    const metrics = await register.metrics()  // ✅ Suppression de `.then()`, ajout de `await`
+    res.send(metrics)
+  } catch (error) {
+    res.status(500).json({ error: "Failed to fetch metrics", details: error })
+  }
+}