gunicorn_conf.py

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

import os
import orjson
import multiprocessing

workers_per_core_str = os.getenv('WORKERS_PER_CORE', '1')
web_concurrency_str = os.getenv('WEB_CONCURRENCY', None)
host = '0.0.0.0'
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 = 2  # web_concurrency
bind = use_bind
keepalive = 120
errorlog = '-'
timeout = 600

# 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(orjson.dumps(log_data))