Docker 烧瓶应用程序不工作 - 端口问题

Question

我正在尝试通过 docker 运行烧瓶。

我的码头文件：

FROM python:3

# set a directory for the app
WORKDIR /usr/src/app

# copy all the files to the container
COPY . .

# install dependencies
RUN pip install --no-cache-dir -r requirements.txt

# tell the port number the container should expose
EXPOSE 3000

# run the command
ENTRYPOINT ["python", "app.py"]

我的 app.py

import os

from flask import Flask, request, jsonify

from submission import SubmissionResult

app = Flask(__name__)



@app.route("/health")
def health_check():
    return "healthy"

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

我跑了docker run <my_image>。

当我在邮递员上点击“/health”时，我收到一条错误消息：

Could not get any response
There was an error connecting to .
Why this might have happened:
The server couldn't send a response:
Ensure that the backend is working properly
Self-signed SSL certificates are being blocked:
Fix this by turning off 'SSL certificate verification' in Settings > General
Proxy configured incorrectly
Ensure that proxy is configured correctly in Settings > Proxy
Request timeout:
Change request timeout in Settings > General

这很奇怪，因为我的烧瓶应用程序没有显示任何调试日志，所以大概请求没有到达服务器。我没有正确暴露端口吗？

我该如何解决这个问题？

Answer 1

您没有在 Python 代码上指定输出端口。它映射到默认端口，即 5000。如果要暴露到端口 3000，请使用 app.run(debug=True, port=3000)。您还必须在主机上导出 Docker 端口，在 <my_image> 之前调用 -p 3000:3000。它会告诉 Docker 将镜像的 3000 端口映射到主机的 3000 端口。