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# From: https://github.com/tiangolo/uvicorn-gunicorn-docker/blob/315f04413114e938ff37a410b5979126facc90af/python3.7/gunicorn_conf.py

import json

import multiprocessing

import os

workers_per_core_str = os.getenv("WORKERS_PER_CORE", "1")

web_concurrency_str = os.getenv("WEB_CONCURRENCY", None)

host = os.getenv("HOST", "0.0.0.0")

port = os.getenv("PORT", "8000")

bind_env = os.getenv("BIND", None)

use_loglevel = os.getenv("LOG_LEVEL", "info")

if bind_env:

use_bind = bind_env

else:

use_bind = f"{host}:{port}"

cores = multiprocessing.cpu_count()

workers_per_core = float(workers_per_core_str)

default_web_concurrency = workers_per_core * cores

if web_concurrency_str:

web_concurrency = int(web_concurrency_str)

assert web_concurrency > 0

else:

web_concurrency = max(int(default_web_concurrency), 2)

# Gunicorn config variables

loglevel = use_loglevel

workers = web_concurrency

bind = use_bind

keepalive = 120

errorlog = "-"

# For debugging and testing

log_data = {

"loglevel": loglevel,

"workers": workers,

"bind": bind,

# Additional, non-gunicorn variables

"workers_per_core": workers_per_core,

"host": host,

"port": port,

}

print(json.dumps(log_data))