Uvicorn + Fast를 종료하는 방법pytest로 테스트 시 workers > = 2로 API를 깔끔하게 적용

Uvicorn + Fast를 종료하는 방법pytest로 테스트 시 workers > = 2로 API를 깔끔하게 적용

나는 Uvicorn + Fast로 작성된 애플리케이션이 있다.API. PyTest를 이용하여 응답 시간을 테스트하고 있습니다.

를 참고하여 테스트를 작성했습니다. 하지만 작업자 >= 2번일 때 테스트를 완료한 후 지원 과정이 살아있는 것을 발견했습니다.

나는 시험이 끝나면 지원 절차를 깨끗이 종료하고 싶다.

당신은 알기라도 하나요?

자세한 내용은 다음과 같습니다.

환경

• 윈도우 10
• 바시 4.4.23()
• 파이썬 3.7.5

라이브러리

• fastapi == 0.68.0
• 유비콘 == 0.14.0
• 요청 == 2.26.0
• 파이 검정 == 6.2.4

샘플 코드

• 용도: 메인.파이의
• 테스트: test_main.파이의

실행 결과

$ curl http://localhost:8765
curl: (7) Failed to connect to localhost port 8765: Connection refused
$ pytest test_main.py
=============== test session starts =============== platform win32 -- Python 3.7.5, pytest-6.2.4, py-1.10.0, pluggy-0.13.1
rootdir: .\
collected 1 item

test_main.py .                                                                                                                                                                                                                         [100%]

=============== 1 passed in 20.23s ===============
$ curl http://localhost:8765
curl: (7) Failed to connect to localhost port 8765: Connection refused
$ sed -i -e "s/WORKERS = 1/WORKERS = 3/g" test_main.py
$ curl http://localhost:8765
curl: (7) Failed to connect to localhost port 8765: Connection refused
$ pytest test_main.py
=============== test session starts =============== platform win32 -- Python 3.7.5, pytest-6.2.4, py-1.10.0, pluggy-0.13.1
rootdir: .\
collected 1 item

test_main.py .                                                                                                                                                                                                                         [100%]

=============== 1 passed in 20.21s ===============
$ curl http://localhost:8765
"hello world"

$ # Why is localhost:8765 still alive?

---

나는 스스로 해결책을 찾았다.

감사합니다 >

해결책

psutil을 설치한 후 test_main을 업데이트합니다.파이의

from multiprocessing import Process
import psutil
import pytest
import requests
import time
import uvicorn

HOST = "127.0.0.1"
PORT = 8765
WORKERS = 3


def run_server(host: str, port: int, workers: int, wait: int = 15) -> Process:
    proc = Process(
        target=uvicorn.run,
        args=("main:app",),
        kwargs={
            "host": host,
            "port": port,
            "workers": workers,
        },
    )
    proc.start()
    time.sleep(wait)
    assert proc.is_alive()
    return proc


def shutdown_server(proc: Process):

    ##### SOLUTION #####
    pid = proc.pid
    parent = psutil.Process(pid)
    for child in parent.children(recursive=True):
        child.kill()
    ##### SOLUTION END ####

    proc.terminate()
    for _ in range(5):
        if proc.is_alive():
            time.sleep(5)
        else:
            return
    else:
        raise Exception("Process still alive")


def check_response(host: str, port: int):
    assert requests.get(f"http://{host}:{port}").text == '"hello world"'


def check_response_time(host: str, port: int, tol: float = 1e-2):
    s = time.time()
    requests.get(f"http://{host}:{port}")
    e = time.time()
    assert e-s < tol


@pytest.fixture(scope="session")
def server():
    proc = run_server(HOST, PORT, WORKERS)
    try:
        yield
    finally:
        shutdown_server(proc)


def test_main(server):
    check_response(HOST, PORT)
    check_response_time(HOST, PORT)
    check_response(HOST, PORT)
    check_response_time(HOST, PORT)

실행 결과

$ curl http://localhost:8765
curl: (7) Failed to connect to localhost port 8765: Connection refused
$ pytest test_main.py
================== test session starts ================== platform win32 -- Python 3.7.5, pytest-6.2.4, py-1.10.0, pluggy-0.13.1
rootdir: .\
collected 1 item

test_main.py .                                                                                                                                                                                                                         [100%]

================== 1 passed in 20.24s ==================
$ curl http://localhost:8765
curl: (7) Failed to connect to localhost port 8765: Connection refused

---

답변 확인

import os
import fastapi
import uvicorn
import psutil

    @app.get("/quit")
    def iquit():
        parent_pid = os.getpid()
        parent = psutil.Process(parent_pid)
        for child in parent.children(recursive=True):  # or parent.children() for recursive=False
            child.kill()
        parent.kill()
    
    
    
    
    if __name__ == '__main__':
        uvicorn.run(app, port=36113, host='127.0.0.1')