java - 将远程机器注册为节点在网格控制台上提供连接超时

Question

我在物理 Windows 机器上设置了一个集线器。我正在尝试设置一个节点以连接到 headless Linux Red Hat VM 上的此集线器。

我使用这个命令来启动节点:

java -jar selenium-server-standalone-3.4.0.jar -role 
node -hub http://<IP>:5786/grid/register

此节点使用以下堆栈跟踪在终端中成功注册

10:38:55.935 INFO - Selenium build info: version: '3.4.0', revision:  
'unknown'
10:38:55.936 INFO - Launching a Selenium Grid node
2017-07-11 10:38:56.716:INFO::main: Logging initialized @1140ms to 
org.seleniumhq.jetty9.util.log.StdErrLog
10:38:56.800 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
10:38:56.800 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
10:38:56.800 INFO - Driver class not found: com.opera.core.systems.OperaDriver
10:38:56.800 INFO - Driver provider com.opera.core.systems.OperaDriver 
registration is skipped:
Unable to create new instances on this machine.
10:38:56.800 INFO - Driver class not found: com.opera.core.systems.OperaDriver
10:38:56.800 INFO - Driver provider com.opera.core.systems.OperaDriver is not 
registered
10:38:56.801 INFO - Driver provider org.openqa.selenium.safari.SafariDriver 
registration is skipped:
 registration capabilities Capabilities [{browserName=safari, version=, 
platform=MAC}] does not match the current platform LINUX
2017-07-11 10:38:56.860:INFO:osjs.Server:main: jetty-9.4.3.v20170317
2017-07-11 10:38:56.905:INFO:osjsh.ContextHandler:main: Started 
o.s.j.s.ServletContextHandler@96def03{/,null,AVAILABLE}
2017-07-11 10:38:56.922:INFO:osjs.AbstractConnector:main: Started 
ServerConnector@69b2283a{HTTP/1.1,[http/1.1]}{0.0.0.0:5555}
2017-07-11 10:38:56.923:INFO:osjs.Server:main: Started @1346ms
10:38:56.923 INFO - Selenium Grid node is up and ready to register to the hub
10:38:56.967 INFO - Starting auto registration thread. Will try to register 
every 
5000 ms.
10:38:56.968 INFO - Registering the node to the hub: 
http://<IP>/grid/register
10:38:57.322 INFO - The node is registered to the hub and ready to use

然而，当我进入控制台时，出现以下消息:

DefaultRemoteProxy unknown version,Connect to <IP>:5555 [/<IP>] failed: connect timed out

此外，在我的集线器终端中出现以下消息:

11:00:26.189 INFO - Unregistering the node http://<IP of NODE>:5555 because 
it's been down for 60006 milliseconds
11:00:33.615 WARN - Cleaning up stale test sessions on the unregistered node 
http://<IP of NODE>:5555

这只会一遍又一遍地循环。

我对此进行了很多调查，但未能找到任何有用的信息。

我发现最接近的是使用网桥连接而不是 NAT 连接，但我在公司环境下，无法摆弄任何这些设置。

编辑

08:53:22.664 INFO - Selenium build info: version: '3.4.0', revision: 
'unknown'
08:53:22.665 INFO - Launching a Selenium Grid node
2017-07-12 08:53:23.505:INFO::main: Logging initialized @1194ms to 
org.seleniumhq.jetty9.util.log.StdErrLog
08:53:23.590 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
08:53:23.591 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
08:53:23.591 INFO - Driver class not found: 
com.opera.core.systems.OperaDriver
08:53:23.591 INFO - Driver provider com.opera.core.systems.OperaDriver 
registration is skipped:
Unable to create new instances on this machine.
08:53:23.591 INFO - Driver class not found: 
com.opera.core.systems.OperaDriver
08:53:23.591 INFO - Driver provider com.opera.core.systems.OperaDriver is not 
registered
08:53:23.592 INFO - Driver provider org.openqa.selenium.safari.SafariDriver 
registration is skipped:
registration capabilities Capabilities [{browserName=safari, version=, 
platform=MAC}] does not match the current platform LINUX
2017-07-12 08:53:23.650:INFO:osjs.Server:main: jetty-9.4.3.v20170317
2017-07-12 08:53:23.699:INFO:osjsh.ContextHandler:main: Started 
o.s.j.s.ServletContextHandler@363ee3a2{/,null,AVAILABLE}
2017-07-12 08:53:23.715:INFO:osjs.AbstractConnector:main: Started 
ServerConnector@cd3fee8{HTTP/1.1,[http/1.1]}{0.0.0.0:8151}
2017-07-12 08:53:23.715:INFO:osjs.Server:main: Started @1404ms
08:53:23.724 INFO - Selenium Grid node is up and ready to register to the hub
08:53:23.765 INFO - Starting auto registration thread. Will try to register 
every 5000 ms.
08:53:23.765 INFO - Registering the node to the hub: 
http://10.56.130.102:5786/grid/register
08:53:24.114 INFO - The node is registered to the hub and ready to use

Answer 1

您的问题是您的 Windows 计算机在端口 5555 上的出站连接，该端口是节点运行的默认端口，被您的 Windows 计算机中的防火墙阻止。请查看this链接可帮助您在 Windows 上打开端口。

这也解释了为什么从节点到 hub 的注册是成功的，但是随后 Hub 将节点标记为 down/stale 然后删除它，因为它无法建立 HTTP GET 到状态 URL节点公开。

由于通常端口 8080 总是在机器上打开，您可以尝试在此端口上运行您的 node，以便集线器可以 ping 回节点以进行状态查询.

Ping 一台机器，然后触发一个 http 操作，如 HTTP GET 似乎不是一回事。参见 this获取更多信息。