django - HTTPConnectionPool(主机 ='0.0.0.0'，端口=5000): Max retries exceeded with url

Question

当我尝试从 Django 应用程序调用在端口 5000 上使用 docker-compose 部署的服务时遇到此错误，该应用程序也在端口 8000 上使用 docker-compose 部署。我也在使用 nginx。

 ConnectionError at /documents/
 HTTPConnectionPool(host='localhost', port=5000): Max retries exceeded with url: 
 /api/documents (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 
 0x7f976607f290>: Failed to establish a new connection: [Errno 111] Connection refused'))

这是发出请求之前的请求对象

      kwargs  
  {'data': None,
   'files': {'file': ('XXX',
                      <InMemoryUploadedFile: XXX.pdf (application/pdf)>,
                      'application/pdf',
                      {})},
   'headers': {'Authorization': 'Token token=XXX',
               'Content-Type': 'application/pdf',
               'PSPDFKit-API-Version': '2020.1.3'},
   'json': None}
  method  
  'post'
  session 
  <requests.sessions.Session object at 0x7f954da972d0>
  url 
  'http://127.0.0.1:5000/api/documents'

这里是相关文件

docker 组成

version: '3.7'

services:
  web:
    build:
      context: ./www
      dockerfile: Dockerfile.prod
    command: gunicorn app.wsgi:application --bind 0.0.0.0:8000
    volumes:
      - ./www:/usr/src/app
      - static_volume:/home/app/web/staticfiles
      - media_volume:/home/app/web/mediafiles
    expose:
      - 8000
    env_file: env.prod
    depends_on:
      - db
  db:
    image: postgres:12.0-alpine
    volumes:
      - postgres_data:/var/lib/postgresql/data/
    env_file: env.prod
  nginx:
    build: ./nginx
    volumes:
      - static_volume:/home/app/web/staticfiles
      - media_volume:/home/app/web/mediafiles
    ports:
      - 1337:80
    depends_on:
      - web
  pspdfkit:
    image: "pspdfkit/pspdfkit:2020.1"
    environment:
      PGUSER: XXX
      PGPASSWORD: XXX
      PGDATABASE: XXX
      PGHOST: db
      PGPORT: 5432

      # Activation key for your PSPDFKit Server installation.
      ACTIVATION_KEY: XXXX

      # Secret token used for authenticating API requests.
      API_AUTH_TOKEN: XXXX

      # Base key used for deriving secret keys for the purposes of authentication.
      SECRET_KEY_BASE: XXXX

      # Public key used for verification of JWTs from web clients. It has to be in the PEM format.
      JWT_PUBLIC_KEY: |
        -----BEGIN PUBLIC KEY-----
        XXXXTYYYYY
        -----END PUBLIC KEY-----
      JWT_ALGORITHM: RS256

      # Credentials to access the admin dashboard.
      DASHBOARD_USERNAME: XXX
      DASHBOARD_PASSWORD: YYY
    depends_on:
      - db
    restart: always
    ports:
      - "5000:5000"
    volumes:
      - asset_storage:/srv/asset_storage

volumes:
  postgres_data:
  static_volume:
  media_volume:
  asset_storage:

nginx.conf

upstream app {
    server web:8000;
}


server {
    client_max_body_size 20M;
    listen 80;

    location / {
        proxy_pass http://app;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        proxy_redirect off;
    }

    location /staticfiles/ {
        alias /home/app/web/staticfiles/;
    }
    location /mediafiles/ {
        alias /home/app/web/mediafiles/;
    }

}

设置.py

  PSPDFKIT_SERVER_HOST = "http://127.0.0.1:5000"
  PSPDFKIT_EXTERNAL_SERVER = "http://127.0.0.1:5000"

我尝试将 url 更改为 localhost、0.0.0.0、pspdfkit(来自 docker-compose 文件)，以及服务器的公共(public) ip，但我最终在所有情况下都会收到上述错误，除非我使用公共(public) ip(它无法建立连接)

我不太精通 ng​​inx，所以我可能遗漏了一些导致此问题的重要配置步骤。帮助将不胜感激!

Answer 1

错误来自于使用0.0.0.0

Docker introduces a virtual network, so each docker-isntance sees itself as 127 not the host machine

(感谢@Jmons)

---

要在本地启动您的代码，使用您的固定 IPv4 地址。

对于 Windows 用户:打开命令提示符 (cmd) 并运行 ipconfig 命令，检索位于 IPv4 地址的 @IP。 . . . . . . . . . . . . .:一般为192.168.x.x类型 IPv4 address in command prompt