问题运行 gunicorn 以服务于烧瓶应用程序

Question

目标：让 gunicorn 服务于烧瓶应用

尝试：运行以下命令：

gunicorn [the name of my project folder]:flaskr

输出：

[2019-08-26 15:04:32 +0000] [16063] [INFO] Starting gunicorn 19.9.0
[2019-08-26 15:04:32 +0000] [16063] [INFO] Listening at: http://127.0.0.1:8000 (16063)
[2019-08-26 15:04:32 +0000] [16063] [INFO] Using worker: sync
[2019-08-26 15:04:32 +0000] [16067] [INFO] Booting worker with pid: 16067
[2019-08-26 15:04:32 +0000] [16067] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/arbiter.py", line 583, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 129, in init_process
    self.load_wsgi()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 138, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load
    return self.load_wsgiapp()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/util.py", line 350, in import_app
    __import__(module)
ImportError: No module named [the name of my project folder]
[2019-08-26 15:04:32 +0000] [16067] [INFO] Worker exiting (pid: 16067)
[2019-08-26 15:04:32 +0000] [16063] [INFO] Shutting down: Master
[2019-08-26 15:04:32 +0000] [16063] [INFO] Reason: Worker failed to boot.

我已将此项目部署到我的 Web 服务器。在我用来管理这个网络服务器的帐户的主目录中，我有一个项目文件夹，因为我正在从我的工作站上处理它。这是从项目文件夹中运行的树输出：

├── flaskr
│   ├── auth.py
│   ├── build
│   ├── db.py
│   ├── db.pyc
│   ├── dist
│   ├── flaskr.egg-info
│   ├── __init__.py
│   ├── __init__.pyc
│   ├── MANIFEST.in
│   ├── old
│   ├── __pycache__
│   ├── schema.sql
│   ├── setup.py
│   ├── static
│   └── templates
├── instance
│   └── flaskr.sqlite
├── keys.csv
├── tests
├── venv
│   ├── bin
│   ├── include
│   ├── lib
│   ├── lib64
│   ├── pyvenv.cfg
│   └── share
└── venv.sh

我已经在 venv 中安装了 gunicorn。我还导出了烧瓶教程中所示的环境变量。

我还配置了 manifest.ini 和 setup.py 以使程序可安装。我试图通过在项目文件夹中运行以下命令来安装：

pip install -e

我得到以下输出：

Usage:   
  pip install [options] <requirement specifier> [package-index-options] ...
  pip install [options] -r <requirements file> [package-index-options] ...
  pip install [options] [-e] <vcs project url> ...
  pip install [options] [-e] <local project path> ...
  pip install [options] <archive url/path> ...

-e option requires an argument

使用“flask run”后，我已验证应用程序本身正在我的工作站上运行。

如果您需要任何文件的代码，请告诉我以及最佳共享方式。下面是一些我认为目前相关的代码：

setup.py：

from setuptools import find_packages, setup

setup(
    name='flaskr',
    version='1.0.0',
    packages=find_packages(),
    include_package_data=True,
    zip_safe=False,
    install_requires=[
        'flask',
    ],
)

manifest.in:

include flaskr/schema.sql
graft flaskr/static
graft flaskr/templates
global-exclude *.pyc

编辑：2019 年 8 月 26 日 - 下午 1:30：

我已尝试通过关注另一篇文章https://www.digitalocean.com/community/tutorials/how-to-serve-flask-applications-with-gunicorn-and-nginx-on-ubuntu-14-04 来发现此问题的原因 当我运行这个命令时：

gunicorn --bind 0.0.0.0:8000 wsgi

输出：

[2019-08-26 17:23:14 +0000] [17748] [INFO] Starting gunicorn 19.9.0
[2019-08-26 17:23:14 +0000] [17748] [INFO] Listening at: http://0.0.0.0:8000 (17748)
[2019-08-26 17:23:14 +0000] [17748] [INFO] Using worker: sync
[2019-08-26 17:23:14 +0000] [17752] [INFO] Booting worker with pid: 17752
[2019-08-26 17:23:15 +0000] [17752] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/arbiter.py", line 583, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 129, in init_process
    self.load_wsgi()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 138, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load
    return self.load_wsgiapp()
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/local/lib/python2.7/dist-packages/gunicorn/util.py", line 350, in import_app
    __import__(module)
  File "/home/[my user name]/[name of the project folder]/wsgi.py", line 1, in <module>
    from [name of the project folder] import app
ImportError: No module named [name of the project folder]
[2019-08-26 17:23:15 +0000] [17752] [INFO] Worker exiting (pid: 17752)
[2019-08-26 17:23:15 +0000] [17748] [INFO] Shutting down: Master
[2019-08-26 17:23:15 +0000] [17748] [INFO] Reason: Worker failed to boot.

这里是wsgi.py：

from [the name of my project folder] import app

if __name__ == "__main__":
    app.run()

我怀疑我在 wsgi.py 中命名错误

Answer 1

在尝试导入您的应用程序实例之前，尝试将您的项目路径插入到sys.path。

wsgi.py:

import os
import sys

directory = os.path.dirname(os.path.realpath(__file__))
app_directory = os.path.join(directory, 'flaskr')

if directory not in sys.path:
    sys.path.insert(0, directory)

if app_directory not in sys.path:
    sys.path.insert(0, app_directory)

from flaskr import app

if __name__ == '__main__':
    app.run()