在 Invoke-Command Cmdlet 中处理 ScriptBlock 中的错误 [英] Handle errors in ScriptBlock in Invoke-Command Cmdlet

问题描述

我正在尝试使用 powershell 在远程计算机上安装服务.

I am trying to install a service on a remote machine using the powershell.

到目前为止，我有以下几点:

So far I have the following:

Invoke-Command -ComputerName  $remoteComputerName -ScriptBlock {
         param($password=$password,$username=$username) 
         $secpasswd = ConvertTo-SecureString $password -AsPlainText -Force
         $credentials = New-Object System.Management.Automation.PSCredential ($username, $secpasswd)
         New-Service -Name "XXX" -BinaryPathName "c:XXX.exe" -DisplayName "XXX XXX XXX" -Description "XXXXXX." -Credential $credentials -ErrorVariable errortext 
         Write-Host("Error in: " + $errortext)
        } -ArgumentList $password,$username -ErrorVariable errortext 


Write-Host("Error out: " + $errortext)

当执行 New-Service 时出现错误时，$errortext ErrorVariable 会在 ScriptBlock 中正确设置，因为文本:Error in: 显示错误.

When there is an error while executing New-Service the $errortext ErrorVariable get set properly inside the ScriptBlock, because the text: "Error in: shows me the error.

Invoke-Command 的 ErrorVariable 未设置(这是我预期的).

The ErrorVariable of the Invoke-Command does not get set (which I expected).

我的问题是:

是否可以将 Invoke-Command 的 ErrorVariable 设置为我在 ScriptBlock 中遇到的错误?

我知道我也可以使用 InstalUtil、WMI 和 SC 来安装该服务，但目前这不相关.

I know I could also use InstalUtil, WMI and SC to install the service, but this is not relevant at the moment.

推荐答案

不，您无法从 Invoke-Command 调用中获取 Errorvariable 以设置与脚本块中的相同.

No, you can't get the Errorvariable from the Invoke-Command call to be set the same as in the scriptblock.

但如果您的目标是检测和处理脚本块中的错误，并将错误返回到 Invoke-Command 调用者的上下文"，那么只需手动执行:

But if your goal is "detect and handle errors in the scriptblock, and also get errors returned back to the context of the Invoke-Command caller" then just do it manually:

$results = Invoke-Command -ComputerName server.contoso.com -ScriptBlock {
   try
   {
       New-Service -ErrorAction 1
   }
   catch
   {
       <log to file, do cleanup, etc>
       return $_
   }
   <do stuff that should only execute when there are no failures>
}

$results 现在包含错误信息.

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