无法从 web 服务器访问 dockerized flask 应用程序的路由

Question

我有一个 flask 应用程序，即使使用 docker，它也可以在 localhost 中完美运行。 但是一旦我部署它，它就不再起作用了。 我后面有一个 404 错误，浏览器回答：

未找到 在服务器上未找到请求的 URL。 如果您手动输入了 URL，请检查您的拼写并重试。

当我从我的服务器 curl localhost:5010/helloworld 得到一个空答案.. 我不知道为什么，但似乎 flask 服务器没有重新启动：

WARNING:root:no config found for parameter None default mode debug loaded
WARNING:flask_cors.core:Unknown option passed to Flask-CORS: headers
WARNING:flask_cors.core:Unknown option passed to Flask-CORS: headers
 * Serving Flask app "application" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
INFO:werkzeug: * Running on https://0.0.0.0:5000/ (Press CTRL+C to quit)
INFO:werkzeug: * Restarting with stat
WARNING:root:no config found for parameter None default mode debug loaded
WARNING:flask_cors.core:Unknown option passed to Flask-CORS: headers
WARNING:flask_cors.core:Unknown option passed to Flask-CORS: headers
WARNING:werkzeug: * Debugger is active!
INFO:werkzeug: * Debugger PIN: 899-121-971

运行.py：

from application import create_app, db
import sys

from OpenSSL import SSL
context = SSL.Context(SSL.PROTOCOL_TLSv1_2)
context.use_privatekey_file('./ssl/server.key')
context.use_certificate_file('./ssl/server.crt')

# we set the app default  value is debug 
appStartingMode= None
if(len (sys.argv) >1):
    appStartingMode= sys.argv[1]

app = create_app(appStartingMode)

if __name__ == "__main__":
    app.debug = True
    app.use_reloader = True
    app.run(host=app.config['FLASK_HOST'], port=app.config['FLASK_PORT'],ssl_context = context)

Dockerfile：

FROM python:3.9.1

EXPOSE 5000

# Install pip requirements
COPY requirements.txt .
RUN python -m pip install -r requirements.txt

WORKDIR /app
COPY . /app

# Switching to a non-root user, please refer to https://aka.ms/vscode-docker-python-user-rights
RUN useradd appuser && chown -R appuser /app
USER appuser

# During debugging, this entry point will be overridden. For more information, please refer to https://aka.ms/vscode-docker-python-debug
CMD [ "python", "./run.py" ]

docker-compose.yml 的提取物：

  bel-backend:
    container_name: bel-backend
    env_file: database-variables.env
    build:
      context: /home/ubuntu/sob/sob-2020-back-end
    ports:
      - 5010:5000
    depends_on :
      - mysql-server

我尝试访问的路线：

@app.route('/helloworld', methods=['GET'])
def helloWorld():
    print("ok")
    return 'Hello World !'

通过键入： https://ipofthemachine:5010/helloworld即使 https 被删除，因为我必须更新我的证书。 有任何想法吗？

[编辑]

如果我分享 config.py 会更好：

from os import environ, path
from dotenv import load_dotenv

basedir = path.abspath(path.dirname(__file__))
load_dotenv(path.join(basedir, '.env'))

class Config:
    """Base config."""
    SECRET_KEY = environ.get('SECRET_KEY')
    '''
    SESSION_COOKIE_NAME = environ.get('SESSION_COOKIE_NAME')
    STATIC_FOLDER = 'static'
    TEMPLATES_FOLDER = 'templates'
    '''

class DebugConfig(Config):
    # General Flask Config
    FLASK_ENV = 'development'
    DEBUG = False
    #TESTING = True
    FLASK_APP = 'run.py'
    FLASK_PORT=5000
    FLASK_HOST='0.0.0.0'


    # Database
    SQLALCHEMY_DATABASE_URI = environ.get('SQLALCHEMY_DATABASE_URI')
    SQLALCHEMY_ECHO = False
    SQLALCHEMY_TRACK_MODIFICATIONS = False

Answer 1

添加到路由脚本的底部

if __name__ == '__main__':
    app.run(host='0.0.0.0')

Answer 2

@Dunski 我回答是因为如果我编辑主要帖子会很长..

所以我按照你说的做了：我对 app.run 进行了硬编码。 我现在有：

appStartingMode= None
if(len (sys.argv) >1):
    appStartingMode= sys.argv[1]

app = create_app(appStartingMode)

Dockerfile：

FROM python:3.9.1

EXPOSE 5000
# Install pip requirements
COPY requirements.txt .
RUN python -m pip install -r requirements.txt

WORKDIR /app
COPY . /app

# Switching to a non-root user, please refer to https://aka.ms/vscode-docker-python-user-rights
RUN useradd appuser && chown -R appuser /app
USER appuser

# During debugging, this entry point will be overridden. For more information, please refer to https://aka.ms/vscode-docker-python-debug
CMD ["flask", "run", "-host", "0.0.0.0", "-port", "5000"]

还有我在 docker-compose 中读到的 .env 文件：

user=root                                                                    
password=*****                                                           
host=mysql                                                                 
port=3306                                                                   
database=bel_2020_db                                                        
                                                                 
SECRET_KEY=secret                                                          
FLASK_APP=run.py                                                           
FLASK_ENV=development                                                      
FLASK_DEBUG=0                                                               
SQLALCHEMY_DATABASE_URI=mysql://${user}:${password}@${host}:${port}/${database
}?charset=utf8mb4&binary&binary_prefix=true                                   
SQLALCHEMY_ECHO=0                                                             
SQLALCHEMY_TRACK_MODIFICATIONS=0 

现在，我尝试使用服务器本身的 ip 地址来 curl docker ... 服务器确实收到请求，但返回 404...