如何检查在 kubernetes pod 的 docker 容器内运行的工人数量？

Question

I am using Flask-uWSGI architecture for a production service and have set the master flag of uWSGI config as False . While running the service, I pass NUM_WORKERS of uWSGI as 2 to the docker container. Based on this doc on uWSGI config , master flag is necessary to re-spawn and pre-fork workers. I wonder if my service containers within the pods are actually using 2 workers?

So, I want to exec into a pod and see the number of uWSGI workers which are actually being used?

Not related but my uWSGI config:

[uwsgi]
socket = 0.0.0.0:9999
protocol = http
module = my_app.server.wsgi
callable = app
master = false
thunder-lock = true

Answer 1

Add a prometheus-exporter to your app, and curl /metrics endpoint manually: https://github.com/timonwong/uwsgi_exporter

It has num workers metric: https://github.com/timonwong/uwsgi_exporter/blob/9f88775cc1a600e4038bb1eae5edfdf38f023dc4/exporter/exporter.go#L50

Further, you can collect this using Prometheus to monitor and alert automatically.