It also features a modular approach to metrics that should instrument all FastAPI endpoints. You can either choose from a set of already existing metrics or create your own. And every metric function by itself can be configured as well. This chapter contains an example on the advanced usage of the Prometheus FastAPI Instrumentator to showcase most of it's features.

September 1, 2025 - Finally we can go to http://localhost:9090 where we will find the Prometheus UI in which we can query by typing http_requests_total into the query bar and running Execute. ... Notice that even though we did not add them manually our label ...

It also features a modular approach to metrics that should instrument all FastAPI endpoints. You can either choose from a set of already existing metrics or create your own. And every metric function by itself can be configured as well. This chapter contains an example on the advanced usage of the Prometheus FastAPI Instrumentator to showcase most of it's features.

The metrics route renders Prometheus metrics from the default collector registry into the appropriate format. Run: (venv) $ pip install fastapi uvicorn (venv) $ python fastapi-example.py """ from typing import List from fastapi import FastAPI, Header, Request, Response from aioprometheus import REGISTRY, Counter, render app = FastAPI() app.state.events_counter = Counter("events", "Number of events.") @app.get("/") async def hello(request: Request): request.app.state.events_counter.inc({"path": "/"}) return "FastAPI Hello" @app.get("/metrics") async def handle_metrics( request: Request, # pylint: disable=unused-argument accept: List[str] = Header(None), ) -> Response: content, http_headers = render(REGISTRY, accept) return Response(content=content, media_type=http_headers["Content-Type"]) if __name__ == "__main__": import uvicorn uvicorn.run(app)

April 15, 2025 - In this file, we import make_asgi_app from prometheus_client to create a Prometheus metrics app. We pass that registry to make_asgi_app() to create the metrics app. We mount that metrics app at the /metrics route using app.mount("/metrics", ...

Example Implementation of Prometheus Client on Fastapi Framework · Counter Example · Gauge Example · Summmary Example · Histogram Example · using makefile · Counter : make counter · Gauge : make gauge · Summary : make summary · Histogram : make histogram · or simply execute the python file.

January 30, 2025 - Prometheus is a tool for collecting metrics from your application. It can be used to collect metrics such as CPU usage, memory usage, and network traffic. ... Inorder to keep we'll use an existing FastAPI app for this guide.

April 15, 2024 - from fastapi import FastAPI from prometheus_client import make_asgi_app app = FastAPI(debug=False) # Using multiprocess collector for registry def make_metrics_app(): registry = CollectorRegistry() multiprocess.MultiProcessCollector(registry) return make_asgi_app(registry=registry) metrics_app = make_metrics_app() app.mount("/metrics", metrics_app)

August 21, 2025 - FastAPI Application (the-app): The Python application we want to monitor. We'll use the prometheus-fastapi-instrumentator library to automatically expose Prometheus-compatible metrics.

March 29, 2022 - This is usually done via the client libraries which are available in commonaly used languages like Python, Java, Scala etc. These libraries are responsible for properly tracking and formatting the metrics as per the desired format by Prometheus. As a first step, install the prometheus_client via pip : pip install prometheus_client · I have a sample demo app in fast-api, for which script is as follow. You can simply save it as fastapi-demo.py and run uvicorn fastapi-demo:app --host=0.0.0.0 --port=8000 --log-level=debug --reload.

July 2, 2026 - version: "3.8" services: app: build: . container_name: fastapi-observability-app ports: - "8000:8000" networks: - monitoring environment: - PYTHONUNBUFFERED=1 prometheus: image: prom/prometheus:latest container_name: fastapi-observability-prometheus volumes: - ./prometheus.yml:/etc/prometheus/prometheus.yml ports: - "9090:9090" networks: - monitoring grafana: image: grafana/grafana:latest container_name: fastapi-observability-grafana ports: - "3030:3000" environment: - GF_SECURITY_ADMIN_USER=admin - GF_SECURITY_ADMIN_PASSWORD=admin volumes: - grafana-storage:/var/lib/grafana depends_on: - prometheus networks: - monitoring networks: monitoring: driver: bridge volumes: grafana-storage:

August 25, 2023 - In this file, we import make_asgi_app from prometheus_client to create a Prometheus metrics app. We pass that registry to make_asgi_app() to create the metrics app. We mount that metrics app at the /metrics route using app.mount("/metrics", ...

January 19, 2025 - In this 5min hands-on video I explain how to take a Python FastAPI application and instrument it to make it “Prometheus enabled”.

On the FastAPI, you can access /metrics endpoint to see the data Prometheus is scraping from it.

December 18, 2023 - This exposes a new /metrics endpoint where FastAPI metrics are available. ... In this format, Prometheus expects metrics from our application. Naturally, basic metrics have been added here.

Use Prometheus Python Client to generate OpenTelemetry format metric with exemplars and expose on /metrics for Prometheus. In order to add an exemplar to metrics, we retrieve the trace id from the current span for the exemplar and add the trace ...

May 14, 2026 - version: '3.8' volumes: prometheus-data: grafana-data: loki-data: services: api: build: . restart: unless-stopped ports: - "8000:8000" labels: logging_job: fastapi prometheus: image: prom/prometheus:v2.45.0 restart: unless-stopped volumes: - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro - prometheus-data:/prometheus ports: - "9090:9090" loki: image: grafana/loki:2.9.0 restart: unless-stopped volumes: - ./loki-config.yml:/etc/loki/local-config.yaml:ro - loki-data:/loki ports: - "3100:3100" command: -config.file=/etc/loki/local-config.yaml promtail: image: grafana/promtail:2.9.0 restart: unless-stopped volumes: - /var/lib/docker/containers:/var/lib/docker/containers:ro - /var/run/docker.sock:/var/run/docker.sock:ro

A FastAPI demo using Prometheus. Contribute to carlosm27/fastapi-prometheus development by creating an account on GitHub.