相关链接
1.https://docs.docker.com/reference/samples/flask/ (docker 部署使用 Gunicore部署Flask)
2.https://flask.palletsprojects.com/en/stable/deploying/gunicorn/ (Gunicorn部署 Flask)
3.https://flask.palletsprojects.com/en/stable/tutorial/views/ (Flask Blueprints)

项目结构

image.png

app.py

import os

from dotenv import load_dotenv, find_dotenv
from flask import Flask, jsonify

from web import index, user

def loadConfig():
    # 加载 .env 文件
    load_dotenv()  # 默认加载当前目录下的 .env 文件
    activeFile = os.environ.get("active.file")

    if activeFile is not None:
        fileName = ".env."f'{activeFile}'

        path = find_dotenv(fileName)
        # load_dotenv(dotenv_path=".env.prod") # 加载指定路径的 .env 文件
        load_dotenv(dotenv_path=path)


def create_app():
    loadConfig()
    # create and configure the app, instance_relative_config设置true无法找到其他的python web文件
    app = Flask(__name__, instance_relative_config=False)

    # 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!'

    @app.errorhandler(404)
    def resource_not_found(e):
        return jsonify(error=str(e)), 404
    
    # 注册其他web文件，没有的话，可以注释掉
    app.register_blueprint(user.bp)
    app.register_blueprint(index.bp)

    app.add_url_rule("/", endpoint="index")

    return app

Dockerfile

FROM python:3.9.2-alpine

# upgrade pip
RUN pip install --upgrade pip

# get curl for healthchecks
# RUN apk add curl

# permissions and nonroot user for tightened security
RUN adduser -D nonroot
RUN mkdir /home/app/ && chown -R nonroot:nonroot /home/app
RUN mkdir -p /var/log/flask-app && touch /var/log/flask-app/flask-app.err.log && touch /var/log/flask-app/flask-app.out.log
RUN chown -R nonroot:nonroot /var/log/flask-app
WORKDIR /home/app
USER nonroot

# copy all the files to the container
COPY --chown=nonroot:nonroot . .

# venv
ENV VIRTUAL_ENV=/home/app/venv

# python setup
RUN python -m venv $VIRTUAL_ENV
ENV PATH="$VIRTUAL_ENV/bin:$PATH"
RUN export FLASK_APP=app.py
RUN pip install -r requirements.txt

docker-compose.yml

services:
  flask-app-1:
    build: ../flaskr
    image: demo:1.0.0
    ports:
      - '8000:8000'
#    healthcheck:
#      test: ["CMD-SHELL", "curl --silent --fail localhost:8000/flask-health-check || exit 1"]
#      interval: 10s
#      timeout: 10s
#      retries: 3
# app为启动入口python文件，create_app()为创建Flask的app方法，可以直接使用声明的Flask的变量，具体内容详情见相关链接2
    command: gunicorn -w 3 -t 10 -b 0.0.0.0:8000 'app:create_app()'

requirements.txt

blinker==1.9.0
click==8.1.7
colorama==0.4.6
Flask==3.1.0
gunicorn==23.0.0
itsdangerous==2.2.0
Jinja2==3.1.5
MarkupSafe==3.0.2
packaging==24.2
python-dotenv==0.21.0
setuptools==75.1.0
Werkzeug==3.1.3
wheel==0.44.0

本地调试 wsgi.py 文件

from app import create_app
import os

if __name__ == "__main__":
    create_app().run(host='0.0.0.0', port=os.environ.get("FLASK_SERVER_PORT") or 8080, debug=True)