Django 无法建立与服务器的连接

Question

我在构建后使用 docker 使用 django 启动项目我没有收到任何错误，我完成了我没有收到任何错误但仍然无法连接到服务器

我的 docker ps 返回

CONTAINER ID   IMAGE         COMMAND                  CREATED          STATUS         PORTS                               NAMES
385d949fdb65   yacosql_web   "python manage.py ru…"   2 minutes ago    Up 2 minutes   0.0.0.0:8000->8000/tcp              yacosql_web_1
754707984f75   mysql:5.7     "docker-entrypoint.s…"   11 minutes ago   Up 2 minutes   0.0.0.0:3306->3306/tcp, 33060/tcp   yacosql_db_1

在 docker-compose up 中：

web_1  | Watching for file changes with StatReloader
web_1  | Performing system checks...
web_1  | 
web_1  | System check identified no issues (0 silenced).
web_1  | 
web_1  | You have 17 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
web_1  | Run 'python manage.py migrate' to apply them.
web_1  | April 25, 2021 - 02:44:17
web_1  | Django version 2.2, using settings 'yacosql.settings'
web_1  | Starting development server at http://127.0.0.1:7777/
web_1  | Quit the server with CONTROL-C.

我的 docker-compose.yml ：

version: "3.3"
   
services:
  db:
    image: mysql:5.7
    ports:
      - '3306:3306'
    environment:
       MYSQL_DATABASE: yacosql
       MYSQL_USER: yacosql
       MYSQL_PASSWORD: yacosql
       MYSQL_ROOT_PASSWORD: yacosql
  web:
    build:
        context: .
        dockerfile: ./docker/Dockerfile
    command: python manage.py runserver 127.0.0.1:7777
    volumes:
      - .:/usr/src/app
    ports:
      - "8000:7777"
    depends_on:
      - db

requirements.txt：

Django==2.2
mysqlclient==2.0.3
django-mysql==3.9.0

码头工人/码头工人文件

# syntax=docker/dockerfile:1
FROM python:3.6
ENV PYTHONUNBUFFERED=1
RUN mkdir /usr/src/app
WORKDIR /usr/src/app
COPY requirements.txt ./
RUN pip install -r requirements.txt
COPY . /usr/src/app

Answer 1

解释

python manage.py runserver 127.0.0.1:7777

在容器中使用上述命令将使 Django 服务器监听环回。有关更多详细信息，您可以阅读此explaination。

指定监听0.0.0.0:7777的Django服务器可以解决。

分辨率

你的docker-compose.yaml应该修改如下：

version: "3.3"
   
services:
  db:
    image: mysql:5.7
    ports:
      - '3306:3306'
    environment:
       MYSQL_DATABASE: yacosql
       MYSQL_USER: yacosql
       MYSQL_PASSWORD: yacosql
       MYSQL_ROOT_PASSWORD: yacosql
  web:
    build:
        context: .
        dockerfile: ./docker/Dockerfile
    command: python manage.py runserver 0.0.0.0:7777  # this line is modified.
    volumes:
      - .:/usr/src/app
    ports:
      - "8000:7777"
    depends_on:
      - db

在docker-compose up 之后，您可以通过执行docker ps 看到您的Web 服务正在运行。结果应该类似于：

CONTAINER ID   IMAGE                                 COMMAND                  CREATED         STATUS         PORTS                                                                                                                                  NAMES
1c6253f87494   so1_web                               "python manage.py ru…"   8 minutes ago   Up 4 minutes   0.0.0.0:8000->7777/tcp

现在您可以尝试连接到您的服务。试试命令：

curl 127.0.0.1:8000

如果一切正常，您将得到预期的响应。

其他

我已将the source code 推送到 GitHub。它在我的电脑上按预期工作。你可以随意克隆。