Warning: Silently ignoring app.run() because the application is run from the flask command line executable #135
Description
An awkward situation. Code:
metrics = prometheus_flask_exporter.PrometheusMetrics(app)
metrics.start_http_server(8081, host=config.METRICS_HOST)Result:
website_1 | * Serving Flask app 'src.app:app' (lazy loading)
website_1 | * Environment: development
website_1 | * Debug mode: on
website_1 | /usr/local/lib/python3.8/dist-packages/prometheus_flask_exporter/__init__.py:322: Warning: Silently ignoring app.run() because the application is run from the flask command line executable. Consider putting app.run() behind an if __name__ == "__main__" guard to silence this warning.
And the metrics server does not listen on port 8081. It seems that Flask notices that I have invoked the main application using flask run, and has elected to disable the ability to run new Flask applications, which obviously breaks start_http_server from prometheus_flask_exporter.
Not sure what the best way to handle this is, but wanted to flag.