Azure + gunicorn + flask + Azure Web App Linux：ModuleNotFoundError：没有名为“flaskr”的模块

Question

用例

我已经按照这些页面上的烧瓶教程进行操作：https://flask.palletsprojects.com/en/1.1.x/tutorial/

项目目录如下：

/src
├── flaskr/
│   ├── __init__.py
│   ├── db.py
│   ├── schema.sql
│   ├── auth.py
│   ├── blog.py
│   ├── templates/
│   │   ├── base.html
│   │   ├── auth/
│   │   │   ├── login.html
│   │   │   └── register.html
│   │   └── blog/
│   │       ├── create.html
│   │       ├── index.html
│   │       └── update.html
│   └── static/
│       └── style.css
├── tests/
│   ├── conftest.py
│   ├── data.sql
│   ├── test_factory.py
│   ├── test_db.py
│   ├── test_auth.py
│   └── test_blog.py
├── venv/
├── setup.py
└── MANIFEST.in

运行网络应用

网络应用程序通过运行脚本“run_app_prod.sh”来工作。

代码可在我的本地机器（ubuntu 20.04）上运行，但不适用于 linux 的 azure web app

run_app_prod.sh

#/bin/bash

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"

echo current $DIR

python -m pip install -e src

./test_if_db_exists.sh

export FLASK_APP="flaskr:create_app()"
# export FLASK_ENV=development

# flask run --host=0.0.0.0
gunicorn --bind=0.0.0.0 --timeout 600 "flaskr:create_app()"

flaskr/init.py 文件

# *-* coding:utf-8 *-*

import os

from flask import Flask
from flaskr.auth import ShowLoginPage, ShowLogoutPage, ShowRegisterPage
from flaskr.sca_tork_easycube_api import ShowActionsPage


def create_app(test_config=None):
    # create and configure the app
    app = Flask(__name__, instance_relative_config=True)
    app.config.from_mapping(
        SECRET_KEY='dev',
        DATABASE=os.path.join(app.instance_path, 'flaskr.sqlite'),
    )

    if test_config is None:
        # load the instance config, if it exists, when not testing
        app.config.from_pyfile('config.py', silent=True)
    else:
        # load the test config if passed in
        app.config.from_mapping(test_config)

    # ensure the instance folder exists
    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass

    # a simple page that says hello
    @app.route('/hello')
    def hello():
        return 'Hello, World!'

    # https://flask.palletsprojects.com/en/1.1.x/tutorial/database/
    from . import db
    db.init_app(app)

    # https://flask.palletsprojects.com/en/1.1.x/tutorial/views/
    
    # /register /login /logout
    from . import auth
    app.register_blueprint(auth.bp)

    app.add_url_rule('/auth/login', view_func=ShowLoginPage.as_view('auth.login'))
    app.add_url_rule('/auth/logout', view_func=ShowLogoutPage.as_view('auth.logout'))
    app.add_url_rule('/auth/register', view_func=ShowRegisterPage.as_view('auth.register'))
    

    from . import sca_tork_easycube_api
    app.add_url_rule('/sca_tork_easycube_api/actions', view_func=ShowActionsPage.as_view('sca_tork_easycube_api.actions'))
    
    # index.html
    from . import index
    app.register_blueprint(index.bp)
    app.add_url_rule('/', endpoint='index')
    
    return app

错误信息

  _____                               
  /  _  \ __________ _________   ____  
 /  /_\  \___   /  |  \_  __ \_/ __ \ 
/    |    \/    /|  |  /|  | \/\  ___/ 
\____|__  /_____ \____/ |__|    \___  >
        \/      \/                  \/ 

A P P   S E R V I C E   O N   L I N U X

Documentation: http://aka.ms/webapp-linux
Python 3.7.5
Note: Any data outside '/home' is not persisted
Starting OpenBSD Secure Shell server: sshd.
Site's appCommandLine: gunicorn --bind=0.0.0.0 --timeout 600 "flaskr:create_app()"
App will launch in debug mode
Launching oryx with: -debugAdapter ptvsd -debugPort 49494 -appPath /home/site/wwwroot -output /opt/startup/startup.sh -virtualEnvName antenv -defaultApp /opt/defaultsite -bindPort 8000 -userStartupCommand 'gunicorn --bind=0.0.0.0 --timeout 600 "flaskr:create_app()"'
Oryx Version: 0.2.20200114.13, Commit: 204922f30f8e8d41f5241b8c218425ef89106d1d, ReleaseTagName: 20200114.13
Found build manifest file at '/home/site/wwwroot/oryx-manifest.toml'. Deserializing it...
Build Operation ID: |4NuzYKKsZco=.40b8e078_
Writing output script to '/opt/startup/startup.sh'
Found virtual environment .tar.gz archive.
Removing existing virtual environment directory /antenv...
Extracting to directory /antenv...
Using packages from virtual environment antenv located at /antenv.
Updated PYTHONPATH to ':/antenv/lib/python3.7/site-packages'
[42] [INFO] Starting gunicorn 20.0.4
[42] [INFO] Listening at: http://0.0.0.0:8000 (42)
[42] [INFO] Using worker: sync
[45] [INFO] Booting worker with pid: 45
[45] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/opt/python/3.7.5/lib/python3.7/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
    worker.init_process()
  File "/opt/python/3.7.5/lib/python3.7/site-packages/gunicorn/workers/base.py", line 119, in init_process
    self.load_wsgi()
  File "/opt/python/3.7.5/lib/python3.7/site-packages/gunicorn/workers/base.py", line 144, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/opt/python/3.7.5/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/opt/python/3.7.5/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 49, in load
    return self.load_wsgiapp()
  File "/opt/python/3.7.5/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 39, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/opt/python/3.7.5/lib/python3.7/site-packages/gunicorn/util.py", line 358, in import_app
    mod = importlib.import_module(module)
  File "/opt/python/3.7.5/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 965, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'flaskr'
 [45] [INFO] Worker exiting (pid: 45)
 [42] [INFO] Shutting down: Master
 [42] [INFO] Reason: Worker failed to boot.

Answer 1

我在没有 Azure 的情况下遇到了类似的错误。分析this issue，我怀疑这是一个与 Gunicorn 相关的导入问题。 我的解决方案是将缺少的目录路径附加到我的入口应用程序脚本的开头（在您的情况下为 flaskr/init.py）：

import sys
sys.path.append('/src/flaskr')

我不知道这是否是一个好习惯，但它对我有用。希望对你也有帮助。