AWS-Linux-Docker-Selenium网格无法启动服务chrome:端口已被分配错误

Question

我正在使用网格配置来运行selenium测试。docker-compose up运行良好，我可以看到用于chrome、firefox和opera的单个容器。

docker-compose up

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但是，当我试图使用docker-compose scale chrome=3创建容器节点时，就会出现以下错误。我尝试过很多种方法，比如改变Linux实例，sudo service docker restart，我不会放过它的。请帮助如何扩大镀铬容器。

 docker-compose scale chrome=3

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 Cannot start service chrome: driver failed programming external connectivity on endpoint ec2-user_chrome_3 (f0d153ee59169eaf94501b8dc9e77db4157614afd731cba673f2aed6c054d237): Bind for 0.0.0.0:6900 failed: port is already allocated

docker-compose.yml

# To execute this docker-compose yml file use `docker-compose -f docker-compose-v3.yml up`
# Add the `-d` flag at the end for detached execution
# To stop the execution, hit Ctrl+C, and then `docker-compose -f docker-compose-v3.yml down`
version: "3"
services:
  chrome:
    image: selenium/node-chrome:4.0.0-beta-1-prerelease-20210114
    volumes:
      - /dev/shm:/dev/shm
    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"

  firefox:
    image: selenium/node-firefox:4.0.0-beta-1-prerelease-20210114
    volumes:
      - /dev/shm:/dev/shm
    depends_on:
      - selenium-hub
    environment:
      - SE_EVENT_BUS_HOST=selenium-hub
      - SE_EVENT_BUS_PUBLISH_PORT=4442
      - SE_EVENT_BUS_SUBSCRIBE_PORT=4443
    ports:
      - "6901:5900"

  opera:
    image: selenium/node-opera:4.0.0-beta-1-prerelease-20210114
    volumes:
      - /dev/shm:/dev/shm
    depends_on:
      - selenium-hub
    environment:
      - SE_EVENT_BUS_HOST=selenium-hub
      - SE_EVENT_BUS_PUBLISH_PORT=4442
      - SE_EVENT_BUS_SUBSCRIBE_PORT=4443
    ports:
      - "6902:5900"

  selenium-hub:
    image: selenium/hub:4.0.0-beta-1-prerelease-20210114
    container_name: selenium-hub
    ports:
      - "4442:4442"
      - "4443:4443"
      - "4444:4444"

Answer 1

这是因为您的节点被配置为将VNC端口公开到某个主机端口，并且当您启动多个节点时，它们都试图绑定在该端口上。

而不是：

    ports:
      - "6901:5900"

你需要使用：

    ports:
      - "5900"

这将使您的码头组合，以暴露容器端口的一个随机选择的自由端口的主机。