Docker 正在运行，但我无法访问 localhost - Flask 应用程序

Question

我构建了 Flask 应用程序，并尝试使其在 Docker 文件上运行。

我运行两个命令:

1)

docker build -t my-api-docker:latest .

2)

docker run -p 5000:5000 my-api-docker 

两者都运行没有错误，终端上的输出是经典的 Flask:

 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

但是

如果我访问:http://localhost:5000如果表明:

The page is not working

需求.txt

Flask==1.1.1
requests==2.20.1
pandas==0.23.4

Dockerfile

FROM python:3.7
RUN pip install --upgrade pip

COPY ./requirements.txt /app/requirements.txt

WORKDIR /app

RUN pip install -r requirements.txt

COPY . /app

EXPOSE 5000

CMD [ "flask", "run" ]

Answer 1

它不应该与容器本地主机绑定(bind)，即

Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

更改 Dockerfile 中的 CMD

CMD [ "flask", "run", "--host=0.0.0.0" ]

或

CMD ["python3", "-m", "flask", "run", "--host=0.0.0.0"] 

或替换您的代码内部

app.run(host='0.0.0.0').