Selenium 节点 Digital Ocean 通过 ssh Xvfb - 不尝试连接到集线器答案

【问题标题】：Selenium node Digital Ocean through ssh Xvfb - does not attempt to connect to hubSelenium 节点 Digital Ocean 通过 ssh Xvfb - 不尝试连接到集线器
【发布时间】：2026-01-10 04:30:02
【问题描述】：

尝试在 Ubuntu 14 上通过带有 xvfb 的 ssh 在无头数字海洋机器上运行 selenium 节点。安装了所有软件包，chromium-browser 在 xvfb 上正确启动。

它的行为很奇怪：没有错误，但根本没有尝试连接集线器。而是仅启动 Jetty。

确切的命令行：

xvfb-run -a --server-args="-screen 0 1920x1280x24" java -Djava.net.preferIPv4Stack=true -jar selenium-server-standalone-2.48.2.jar -role node -Dwebdriver.chrome.driver=./chromedriver -hub "http://localhost:4444/grid/register" -browser "browserName=chrome, platform=LINUX, maxInstances=5, chrome.binary=/usr/bin/chromium-browser"

在我的本地 PC 上，节点尝试连接到集线器，而在无头数字海洋上没有任何反应，集线器没有在 /grid/console 页面上列出节点。 唯一的线索是节点日志的最后几行不同。

无头数字海洋：

11:55:53.483 INFO - Version Jetty/5.1.x
11:55:53.484 INFO - Started HttpContext[/selenium-server,/selenium-server]

我的电脑：

17:52:04.859 INFO - Selenium Grid node is up and ready to register to the hub
17:52:04.877 INFO - Starting auto registration thread. Will try to register every 5000 ms.
17:52:04.877 INFO - Registering the node to the hub: http://46.101.128.117:4444/grid/register
17:52:04.936 INFO - The node is registered to the hub and ready to use

有什么想法可能是错的吗？有没有人用类似的设置成功过？

Digital Ocean 的完整日志无头：

11:55:52.753 INFO - Launching a Selenium Grid node
11:55:52.820 INFO - Adding browserName=chrome, platform=LINUX, maxInstances=5, chrome.binary=/usr/bin/chromium-browser
Setting system property webdriver.chrome.driver to ./chromedriver
11:55:53.347 INFO - Java: Oracle Corporation 25.45-b02
11:55:53.348 INFO - OS: Linux 3.19.0-22-generic amd64
11:55:53.354 INFO - v2.48.0, with Core v2.48.0. Built from revision 41bccdd
11:55:53.433 INFO - Driver provider org.openqa.selenium.ie.InternetExplorerDriver registration is skipped:
registration capabilities Capabilities [{ensureCleanSession=true, browserName=internet explorer, version=, platform=WINDOWS}] does not match the current platform LINUX
11:55:53.434 INFO - Driver provider org.openqa.selenium.edge.EdgeDriver registration is skipped:
registration capabilities Capabilities [{browserName=MicrosoftEdge, version=, platform=WINDOWS}] does not match the current platform LINUX
11:55:53.434 INFO - Driver class not found: com.opera.core.systems.OperaDriver
11:55:53.435 INFO - Driver provider com.opera.core.systems.OperaDriver is not registered
11:55:53.483 INFO - Version Jetty/5.1.x
11:55:53.484 INFO - Started HttpContext[/selenium-server,/selenium-server]

在我的 PC 上运行的相同示例给出：

17:52:04.341 INFO - Launching a Selenium Grid node
17:52:04.387 INFO - Adding browserName=chrome, platform=LINUX, maxInstances=5, chrome.binary=/usr/bin/chromium-browser
Setting system property webdriver.chrome.driver to ./chromedriver
17:52:04.750 INFO - Java: Oracle Corporation 25.45-b02
17:52:04.750 INFO - OS: Linux 3.19.0-30-generic amd64
17:52:04.754 INFO - v2.48.0, with Core v2.48.0. Built from revision 41bccdd
17:52:04.816 INFO - Driver provider org.openqa.selenium.ie.InternetExplorerDriver registration is skipped:
registration capabilities Capabilities [{ensureCleanSession=true, browserName=internet explorer, version=, platform=WINDOWS}] does not match the current platform LINUX
17:52:04.817 INFO - Driver provider org.openqa.selenium.edge.EdgeDriver registration is skipped:
registration capabilities Capabilities [{browserName=MicrosoftEdge, version=, platform=WINDOWS}] does not match the current platform LINUX
17:52:04.818 INFO - Driver class not found: com.opera.core.systems.OperaDriver
17:52:04.818 INFO - Driver provider com.opera.core.systems.OperaDriver is not registered
17:52:04.859 INFO - Selenium Grid node is up and ready to register to the hub
17:52:04.877 INFO - Starting auto registration thread. Will try to register every 5000 ms.
17:52:04.877 INFO - Registering the node to the hub: http://46.101.128.117:4444/grid/register
17:52:04.936 INFO - The node is registered to the hub and ready to use

【问题讨论】：

标签： selenium ssh selenium-grid digital-ocean

【解决方案1】：

我有办法。

已经在Selenium stand alone server hang while starting中描述了。

根本原因：数字海洋机器有一些弱熵，所以需要使用额外的软件工具。

如果 selenium 检测到这一点并显示一些消息而不是挂起会很好。

【讨论】：

在文章之后：*.com/questions/27216816/… 为我解决了这个问题。我在数字海洋之外的 RHEL7 机器上遇到了类似的问题。

【解决方案2】：

如果您在 Linux 上的虚拟机或无头服务器（包括 Digital Ocean 虚拟机）中运行 selenium 节点，您可能会遇到此问题。这是因为您的虚拟机/服务器没有足够的可用熵。

要解决这个问题，只需安装haveged（或其他类似的东西）。

要在 CentOS 7 上安装它，你需要启用 EPEL，然后运行：

yum install haveged
systemctl enable haveged
systemctl start haveged

对于其他 Linux 发行版，请参阅：https://www.digitalocean.com/community/tutorials/how-to-setup-additional-entropy-for-cloud-servers-using-haveged

【讨论】：