Need requests_inprogress metric as a default metric

[scotgopal]

This is one of the basic metrics when it comes to monitoring requests made to a server. Such a metric is useful to give additional insight on the kind of load that the server is going through in that particular moment.

This is the feature that I plan to work on for this package.

[stephenhillier]

the requests_in_progress metric is now available in v0.10.0! Thanks @scotgopal for contributing it.

Since you requested paths in the metric, we can leave this issue open until we are also tracking the request path.

[scotgopal]

the requests_in_progress metric is now available in v0.10.0! Thanks @scotgopal for contributing it.

Since you requested paths in the metric, we can leave this issue open until we are also tracking the request path.

Duly noted. Thank you @stephenhillier . Hope we can work together in future contributions too.

[stephenhillier]

I am going to close this as done, since in-progress requests metrics are working but I still haven't come up with a way to automatically label it by path.

If anybody needs in-progress requests counts by path, my suggestion for now is to just add an extra Gauge to the function you are interested in (example borrowed from https://github.com/prometheus/client_python#gauge):

from prometheus_client import Gauge

g = Gauge('my_inprogress_requests', 'Description of gauge')

async def some_view(request):
    with g.track_inprogress():
        pass