docker中的烧瓶热装不起作用，日志显示情况并非如此

Question

我在PyCharm中运行以下docker-compose.yml，它运行docker-compose up

version: '3'
services:
posts:
environment:
FLASK_DEBUG: 1
image: flask-blog-posts
build:
context: .
dockerfile: 'posts/Dockerfile'
ports:
- "5001:5001"
comments:
environment:
FLASK_DEBUG: 1
image: flask-blog-comments
build:
context: .
dockerfile: 'comments/Dockerfile'
ports:
- "5002:5002"

其依次启动CCD_ 3和CCD_。以下是posts服务的日志：

* Debug mode: on
2022-09-22T17:17:44.094571019Z WARNING: This is a development server. Do not use it in a production deployment. Use a production WSGI server instead.
2022-09-22T17:17:44.094599147Z  * Running on all addresses (0.0.0.0)
2022-09-22T17:17:44.094603187Z  * Running on http://127.0.0.1:5001
2022-09-22T17:17:44.094606086Z  * Running on http://172.18.0.3:5001
2022-09-22T17:17:44.094809796Z Press CTRL+C to quit
2022-09-22T17:17:44.096079648Z  * Restarting with stat
2022-09-22T17:17:44.498014077Z  * Debugger is active!
2022-09-22T17:17:44.499326875Z  * Debugger PIN: 643-209-648
2022-09-22T17:18:11.411390459Z 172.18.0.1 - - [22/Sep/2022 17:18:11] "GET / HTTP/1.1" 200 -
2022-09-22T17:18:13.610573254Z 172.18.0.1 - - [22/Sep/2022 17:18:13] "GET /favicon.ico HTTP/1.1" 404 -
2022-09-22T17:19:12.423894271Z 172.18.0.1 - - [22/Sep/2022 17:19:12] "GET / HTTP/1.1" 200 -

它清楚地表明调试器是活动的，但是，当我对相应的应用程序代码进行更改时，什么都不会发生，更改也不会被检测到。目录如下所示：

├── README.md
├── comments
│   ├── Dockerfile
│   ├── __init__.py
│   └── app.py
├── docker-compose.yml
├── posts
│   ├── Dockerfile
│   ├── __init__.py
│   └── app.py
├── requirements.txt
├── static
└── templates

posts/app.py和comments/app.py包含如下相同的代码：

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
return 'Hello world!'

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

这里有两个docker文件，除了分别用于posts和comments的端口5001和5002之外，它们几乎相同。

FROM python:3.10
COPY . .
RUN pip install -r requirements.txt
WORKDIR comments
CMD [ "flask", "run", "--host=0.0.0.0", "--port=5001"]

我需要，每当我对代码进行任何更改时，它都应该相应地反映和重新加载。当前行为：我在app.py中的任何一个中进行更改，例如：将Hello world!更改为Hello earth!，如果我刷新页面50次，我仍然会得到Hello world。我尝试重建两个容器，重新启动docker，删除配置文件。。。什么都不管用。

Answer 1

这是因为您的代码被复制到一个容器&那么该容器正在运行代码。您所做的更改不在系统的容器中。如果你想让更改反映出来，你需要在文件中添加一个卷，如下所示：：

version: '3'
services:
posts:
environment:
FLASK_DEBUG: 1
volumes:
- .:/code
image: flask-blog-posts
build:
context: .
dockerfile: 'posts/Dockerfile'
ports:
- "5001:5001"
comments:
environment:
FLASK_DEBUG: 1
volumes:
- .:/code
image: flask-blog-comments
build:
context: .
dockerfile: 'comments/Dockerfile'
ports:
- "5002:5002"

通过这种方式，当您对进行更改时/localpath目录，它们将反映在容器中。

---

更新-为其他文件以及添加准确的更改

帖子&评论Dockerfiles-

FROM python:3.10
WORKDIR /code
COPY . .
RUN pip install -r requirements.txt
WORKDIR comments
CMD [ "flask", "run", "--host=0.0.0.0", "--port=5001"]