通过CloudPanel+uWSGI部署Flask应用至Azure时遇内部服务器错误

结果：内部服务器错误（Internal Server Error）

基础信息 #

• 应用使用Python 3.8.16版本
• 以下内容已隐去实际用户名及域名
• 严格遵循CloudPanel官方部署步骤
• 使用子域名部署
• 应用在本地及虚拟环境开发模式下运行正常
• uWSGI已监听8090端口

应用主模块（api.py） #

from flask import Flask, request, jsonify, render_template
import joblib

app = Flask(__name__)
classifier = joblib.load('./model/pipeline.pkl')

@app.route('/')
def home():
    message = "API has been deployed correctly!"
    return render_template('index.html', message=message)

@app.route('/predict', methods=['POST'])
def predict():
    json_ = request.json

    prediction = classifier.predict(json_['text']).tolist()
    return jsonify({'prediction': prediction[0] })

if __name__ == '__main__':
    classifier = joblib.load('./model/pipeline.pkl')
    app.run(host='0.0.0.0')

WSGI入口文件（wsgi.py） #

from api import app

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

uWSGI配置文件（ini） #

[uwsgi]
plugins       = python3
master        = true
protocol      = uwsgi
socket        = 127.0.0.1:8090
chdir         = /home/username/htdocs/api.domain.com
wsgi-file     = /home/username/htdocs/api.domain.com/api/wsgi.py
callable      = app

# In case you're using virtualenv uncomment this:
virtualenv = /home/username/htdocs/api.domain.com/env

# Needed for OAuth/OpenID
buffer-size   = 8192

# Reload when consuming too much of memory
reload-on-rss = 250

# Increase number of workers for heavily loaded sites
workers       = 4

# Enable threads for Sentry error submission
enable-threads = true

# Child processes do not need file descriptors
close-on-exec = true

# Avoid default 0000 umask
umask = 0022

#Run as weblate user
uid = username
gid = username

# Enable harakiri mode (kill requests after some time)
# harakiri = 3600
# harakiri-verbose = true

# Enable uWSGI stats server
# stats = :1717
# stats-http = true

# Do not log some errors caused by client disconnects
ignore-sigpipe = true
ignore-write-errors = true
disable-write-exception = true

Nginx虚拟主机配置文件 #

server {
  listen 80;
  listen [::]:80;
  listen 443 ssl http2;
  listen [::]:443 ssl http2;
  {{ssl_certificate_key}}
  {{ssl_certificate}}
  server_name api.domain.com;
  {{root}}

  {{nginx_access_log}}
  {{nginx_error_log}}

  if ($scheme != "https") {
    rewrite ^ https://$host$uri permanent;
  }

  location ~ /.well-known {
    auth_basic off;
    allow all;
  }

  {{settings}}

  index index.html;

  location / {
    include uwsgi_params;
    uwsgi_read_timeout 3600;
    #uwsgi_pass unix:///run/uwsgi/app/weblate/socket;
    uwsgi_pass 127.0.0.1:8090;
  }

  #location ~* ^.+\.(css|js|jpg|jpeg|gif|png|ico|gz|svg|svgz|ttf|otf|woff|woff2|eot|mp4|ogg|ogv|webm|webp|zip|swf)$ {
  #  add_header Access-Control-Allow-Origin "*";
  #  expires max;
  #  access_log on;
  #}

  if (-f $request_filename) {
    break;
  }
}

已执行操作 #

• 重启Nginx服务
• 重启uWSGI服务
• 重启Azure实例

预期效果 #

访问站点时显示包含"API has been deployed correctly!"的页面

内容的提问来源于stack exchange，提问作者iamuendo