Detect if flask is being run via gunicorn?

Question

Is there a way I can check if my flask app is being run instide a gunicorn container? Currently I set an enviroment variable to tell my application this, but I'd prefer that it be automatic. Additionally, is there someway I can check what worker class is being used?

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I need to detect this for a few different reasons. Note that typically I use gunicorn, but during testing I won't sometimes.

1. Logging: I attach to a gunicorn info log when run in gunicorn, otherwise to a stdout log.
2. Eventlet/subprocess: Since I use subprocesses I need to ensure that the proper monkey_patch'ing is done when using eventlet, otherwise it doesn't behave correctly. (I call many subprocesses).

Answer 1

晚会晚了，但是似乎很有效的解决方案很有效：

is_gunicorn = "gunicorn" in os.environ.get("SERVER_SOFTWARE", "")