HTTPConnectionPool(host='localhost', port=4444)

Question

我需要在 docker 容器中運行我的腳本

version: "3"
services:
  chrome:
    image: selenium/node-chrome:4.0.0-rc-1-prerelease-20210823
    shm_size: 2gb
    depends_on:
      - selenium-hub
    environment:
      - SE_EVENT_BUS_HOST=selenium-hub
      - SE_EVENT_BUS_PUBLISH_PORT=4442
      - SE_EVENT_BUS_SUBSCRIBE_PORT=4443
    ports:
      - "6900:5900"

  selenium-hub:
    image: selenium/hub:4.0.0-rc-1-prerelease-20210823
    container_name: selenium-hub
    ports:
      - "4444:4444"
   app:
        build:
            context: . 
        volumes:
            - . :/home/saimon/
        network_mode: "host"
        depends_on:
            - selenium-hub
            - chrome
        command:
            python3 app.py
        environment:
            - SELENIUM_REMOTE_HOST=selenium-hub

在我的應用程序中我：

driver = webdriver.Remote(command_executor='http://selenium-hub:4444/wd/hub',
                                           desired_capabilities=DesiredCapabilities.CHROME, options=self.chrome_options)

我制作：docker-compose 構建

sudo docker-compose run --rm app 或 docker-compose -f docker-compose.yml up

並顯示此錯誤：

urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='selenium-hub', port=4444): Max retries exceeded with url: /wd/hub/session (由 NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fa7f86b3700>:無法建立新連接：[Errno -3] 名稱解析暫時失敗'))

Answer 1

如果您希望能夠從應用程序容器連接到http://selenium-hub:4444 ，請刪除network_mode: "host"

您還應該嘗試使用 env-var

import os 

host = os.environ['SELENIUM_REMOTE_HOST']
driver = webdriver.Remote(command_executor='http://{}:4444/wd/hub'.format(host),
  ...