从GCP安装文档运行“Hello Cloud Run with Python”时，日志中出现“[CRITICAL]WORKER TIMEOUT”

Question

在tutorial here之后，我有以下两个文件：

app.py

from flask import Flask, request

app = Flask(__name__)


@app.route('/', methods=['GET'])
def hello():
    """Return a friendly HTTP greeting."""
    who = request.args.get('who', 'World')
    return f'Hello {who}!\n'


if __name__ == '__main__':
    # Used when running locally only. When deploying to Cloud Run,
    # a webserver process such as Gunicorn will serve the app.
    app.run(host='localhost', port=8080, debug=True)

Dockerfile

# Use an official lightweight Python image.
# https://hub.docker.com/_/python
FROM python:3.7-slim

# Install production dependencies.
RUN pip install Flask gunicorn

# Copy local code to the container image.
WORKDIR /app
COPY . .

# Service must listen to $PORT environment variable.
# This default value facilitates local development.
ENV PORT 8080

# Run the web service on container startup. Here we use the gunicorn
# webserver, with one worker process and 8 threads.
# For environments with multiple CPU cores, increase the number of workers
# to be equal to the cores available.
CMD exec gunicorn --bind 0.0.0.0:$PORT --workers 1 --threads 8 app:app

然后，我使用Cloud build和Cloud run构建并运行它们：

PROJECT_ID=$(gcloud config get-value project)
DOCKER_IMG="gcr.io/$PROJECT_ID/helloworld-python"
gcloud builds submit --tag $DOCKER_IMG
gcloud run deploy --image $DOCKER_IMG --platform managed

代码运行正常，我可以在给定的URL上访问应用程序。然而，日志似乎表明了一个严重错误，工人们继续重新启动。以下是启动应用程序并在我的web浏览器中发出一些请求后从Cloud运行的日志文件：

2020-03-05T03:37:39.392Z Cloud Run CreateService helloworld-python ...
2020-03-05T03:38:03.285477Z[2020-03-05 03:38:03 +0000] [1] [INFO] Starting gunicorn 20.0.4
2020-03-05T03:38:03.287294Z[2020-03-05 03:38:03 +0000] [1] [INFO] Listening at: http://0.0.0.0:8080 (1)
2020-03-05T03:38:03.287362Z[2020-03-05 03:38:03 +0000] [1] [INFO] Using worker: threads
2020-03-05T03:38:03.318392Z[2020-03-05 03:38:03 +0000] [4] [INFO] Booting worker with pid: 4
2020-03-05T03:38:15.057898Z[2020-03-05 03:38:15 +0000] [1] [INFO] Starting gunicorn 20.0.4
2020-03-05T03:38:15.059571Z[2020-03-05 03:38:15 +0000] [1] [INFO] Listening at: http://0.0.0.0:8080 (1)
2020-03-05T03:38:15.059609Z[2020-03-05 03:38:15 +0000] [1] [INFO] Using worker: threads
2020-03-05T03:38:15.099443Z[2020-03-05 03:38:15 +0000] [4] [INFO] Booting worker with pid: 4
2020-03-05T03:38:16.320286ZGET200 297 B 2.9 s Safari 13  https://helloworld-python-xhd7w5igiq-ue.a.run.app/
2020-03-05T03:38:16.489044ZGET404 508 B 6 ms Safari 13  https://helloworld-python-xhd7w5igiq-ue.a.run.app/favicon.ico
2020-03-05T03:38:21.575528ZGET200 288 B 6 ms Safari 13  https://helloworld-python-xhd7w5igiq-ue.a.run.app/
2020-03-05T03:38:27.000761ZGET200 285 B 5 ms Safari 13  https://helloworld-python-xhd7w5igiq-ue.a.run.app/?who=me
2020-03-05T03:38:27.347258ZGET404 508 B 13 ms Safari 13  https://helloworld-python-xhd7w5igiq-ue.a.run.app/favicon.ico
2020-03-05T03:38:34.802266Z[2020-03-05 03:38:34 +0000] [1] [CRITICAL] WORKER TIMEOUT (pid:4)
2020-03-05T03:38:35.302340Z[2020-03-05 03:38:35 +0000] [4] [INFO] Worker exiting (pid: 4)
2020-03-05T03:38:48.803505Z[2020-03-05 03:38:48 +0000] [5] [INFO] Booting worker with pid: 5
2020-03-05T03:39:10.202062Z[2020-03-05 03:39:09 +0000] [1] [CRITICAL] WORKER TIMEOUT (pid:5)
2020-03-05T03:39:10.702339Z[2020-03-05 03:39:10 +0000] [5] [INFO] Worker exiting (pid: 5)
2020-03-05T03:39:18.801194Z[2020-03-05 03:39:18 +0000] [6] [INFO] Booting worker with pid: 6

请注意日志末尾的工作程序超时和重新启动。事实上，这是一个严重的错误，让我认为它不应该发生。这是预期的行为吗？这是云运行机器在请求来去时启动和停止我的服务的副作用吗

Answer 1

下面是一个Flask应用程序在云上运行的工作示例。我猜是您的最后一行或Decker文件以及python文件的最后一部分导致了这种行为

main.py

# main.py
#gcloud beta run services replace service.yaml


from flask import Flask

app = Flask(__name__)

@app.route("/")
def hello_world():

        msg = "Hello World"
    return msg

Dockerfile（不需要apt get部分）

# Use the official Python image.
# https://hub.docker.com/_/python
FROM python:3.7

# Install manually all the missing libraries
RUN apt-get update
RUN apt-get install -y gconf-service libasound2 libatk1.0-0 libcairo2 libcups2 libfontconfig1 libgdk-pixbuf2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libxss1 fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils

# Install Python dependencies.
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt

ENV APP_HOME /app
WORKDIR $APP_HOME
COPY . .

CMD exec gunicorn  bind :$PORT  workers 1  threads 8 main:app

然后使用以下方法构建：

gcloud builds submit  tag gcr.io/[PROJECT]/[MY_SERVICE]

并部署：

gcloud beta run deploy [MY_SERVICE]  image gcr.io/[PROJECT]/[MY_SERVICE]  region europe-west1  platform managed

更新 我再次检查了你提供的日志。 在新部署之后的一开始，收到此类警告/错误是正常的，因为旧实例没有处理任何请求，但在完全关闭之前，它们处于空闲状态

Gunicorn还有一个默认超时30秒，它与“引导工作程序”和您看到错误之间的时间相匹配

Answer 2

Cloud Run已缩小了您的一个实例，仲裁程序认为它已暂停

您应该将 timeout 0添加到gunicorn调用中以完全禁用工作超时，这对于云运行是不必要的