freeleaps-authentication/webapi/providers/metrics.py

import logging
from prometheus_fastapi_instrumentator import Instrumentator
from common.config.app_settings import app_settings


def register(app):
    instrumentator = Instrumentator().instrument(
        app,
        metric_namespace="freeleaps_{}".format(app_settings.FREELEAPS_PRODUCT_ID),
        metric_subsystem=app_settings.ENVIRONMENT)

    @app.on_event("startup")
    async def startup():
        instrumentator.expose(app, endpoint="/api/_/metrics", should_gzip=True)
        logging.info("Metrics endpoint exposed at /api/_/metrics")