如何使用 Selenium/Node 容器的 noVNC 功能显示正在运行的测试的实时预览

Question

使用

selenium/node-docker

和

selenium/hub

如何访问

http://<node-ip>:7900?autoconnect=1&resize=scale&password=secret

上显示的 novnc 实时预览

这是我的 docker-compose

version: "3"
services:
  node-docker:
    container_name: node-docker
    image: selenium/node-docker:4.21.0-20240522
    volumes:
      - ./assets:/opt/selenium/assets             #For video recordings
      - ./config.toml:/opt/bin/config.toml        #Mount configuration file
      - /var/run/docker.sock:/var/run/docker.sock #Grid to run docker commands
    depends_on:
      - selenium-hub
    environment:
      - SE_EVENT_BUS_HOST=selenium-hub
      - SE_EVENT_BUS_PUBLISH_PORT=4442
      - SE_EVENT_BUS_SUBSCRIBE_PORT=4443
      - SE_VNC_VIEW_ONLY=1
      - SE_VNC_NO_PASSWORD=1

  selenium-hub:
    image: selenium/hub:4.21.0-20240522
    container_name: selenium-hub
    ports:
      - "4442:4442"
      - "4443:4443"
      - "4444:4444"

  app:
    container_name: app
    build:
      context: ./app
    ports:
      - "5000:5000"

这是 selenium/node-docker 用于构建节点的 config.toml

[docker]
# Configs have a mapping between the Docker image to use and the capabilities that need to be matched to
# start a container with the given image.
configs = [
    "selenium/standalone-chrome:4.21.0-20240522", '{"browserName": "chrome"}'
]

host-config-keys = ["Dns", "DnsOptions", "DnsSearch", "ExtraHosts", "Binds"]

# URL for connecting to the docker daemon
# Most simple approach, leave it as http://127.0.0.1:2375, and mount /var/run/docker.sock.
# 127.0.0.1 is used because internally the container uses socat when /var/run/docker.sock is mounted 
# If var/run/docker.sock is not mounted: 
# Windows: make sure Docker Desktop exposes the daemon via tcp, and use http://host.docker.internal:2375.
# macOS: install socat and run the following command, socat -4 TCP-LISTEN:2375,fork UNIX-CONNECT:/var/run/docker.sock,
# then use http://host.docker.internal:2375.
# Linux: varies from machine to machine, please mount /var/run/docker.sock. If this does not work, please create an issue.
url = "http://127.0.0.1:2375"
# Docker image used for video recording
video-image = "selenium/video:ffmpeg-6.1.1-20240522"

# Uncomment the following section if you are running the node on a separate VM
# Fill out the placeholders with appropriate values
#[server]
#host = <ip-from-node-machine>
#port = <port-from-node-machine>

我想要的只是在我的应用程序中显示实时测试，但我无法让它工作，我什至尝试直接通过

ws://0.0.0.0:4444/session/<session_id>/se/vnc

中的 novnc websocket 二进制消息，但事情太复杂了。
有什么帮助吗？

Answer 1

noVNC

上的

selenium/node-docker

端口尚未暴露。

要使用 noVNC，必须配置

selenium/node-docker

，将容器的默认 noVNC 端口 (7900) 分配给任何本地/主机端口。

另外，对于包含浏览器的图像，请使用标志 --shm-size=2g 来使用主机的共享内存（基于上面的问题，即

selenium/standalone-chrome:4.21.0-20240522

）。

请参阅下面修改后的 docker-compose.yml：

    version: "3"
    services:
      node-docker:
        container_name: node-docker
        image: selenium/node-docker:4.21.0-20240522
        shm_size: 2gb
        volumes:
          - ./assets:/opt/selenium/assets             #For video recordings
          - ./config.toml:/opt/bin/config.toml        #Mount configuration file
          - /var/run/docker.sock:/var/run/docker.sock #Grid to run docker commands
        depends_on:
          - selenium-hub
        environment:
          - SE_EVENT_BUS_HOST=selenium-hub
          - SE_EVENT_BUS_PUBLISH_PORT=4442
          - SE_EVENT_BUS_SUBSCRIBE_PORT=4443
          - SE_VNC_VIEW_ONLY=1
          - SE_VNC_NO_PASSWORD=1
        ports:
          - "7900:7900" #Expose noVNC port

      selenium-hub:
        image: selenium/hub:4.21.0-20240522
        container_name: selenium-hub
        ports:
          - "4442:4442"
          - "4443:4443"
          - "4444:4444"
    
      app:
        container_name: app
        build:
          context: ./app
        ports:
          - "5000:5000"

重新创建网格，然后您应该能够像之前通过

noVNC

 一样访问 

http://<node-ip>:7900autoconnect=1&resize=scale&password=secret

此外，还可以通过 Selenium Grid UI 访问

noVNC

预览，方法是转到

Sessions

选项卡，然后单击

video

旁边的

session id

图标。