PowerShell：远程执行控制台应用程序失败

Question

在 powershell 中运行以下代码段时，我看到一个错误（创建管道时发生错误）。 有人能帮我一下吗？

# This file contains the list of servers you want to copy files/folders to
$computers = gc "C:\folder1\sub1\server.txt"
 
# This is the file/folder(s) you want to copy to the servers in the $computer variable
$source = "\\usa-chicago1\c$\Program Files\"
 
# The destination location you want the file/folder(s) to be copied to
$destination = "c$\July\"
$username = 'harry'
$password = 'hqwtrey$1'
$secpw = ConvertTo-SecureString $password -AsPlainText -Force
$cred  = New-Object Management.Automation.PSCredential ($username, $secpw)


foreach ($computer in $computers) {
if ((Test-Path -Path \\$computer\$destination)) {

     Write-Output "INSIDE IF BLOCK"
    #Copy-Item $source -Destination \\$computer\$destination -Recurse
    Invoke-Command -Computername $computer -ScriptBlock { & '\\$computer\July\' --service install --config-directory '\\$computer\July\conf' } 
    Invoke-Command -Computername $computer -ScriptBlock { & net start telegraf } 
} 
else {
    
    Write-Output $computer
    New-Item -Path "\\$computer\july\" -ItemType Directory
    Write-Output \\$computer\$destination
    Copy-Item $source -Destination \\$computer\$destination -Recurse
}
}
 

Answer 1

• 传递给Invoke-Command -ComputerName...脚本块远程执行，远程 session 对调用者的变量一无所知； 通过$using: scope 引用调用者的变量 - 请参阅此答案。

• 变量引用只能嵌入在双引号字符串（ "..." ）中，而单引号字符串（ '...' ）会逐字处理它们的内容 - 请参阅此答案的底部以了解 PowerShell 字符串文字的概述.

所以：

Invoke-Command -Computername $computer -ScriptBlock { 
  & "\\$using:computer\July\Telegraf\telegraf" --service install --config-directory "\\$using:computer\July\Telegraf\conf"
} 

---

至于你看到的那条不详的错误信息， RuntimeException: An error occurred while creating the pipeline. ：

这应该被认为是一个错误； 您应该看到&: The term '\\$computer\July\Telegraf\telegraf' is not recognized as the name of a cmdlet, function, script file, or operable program. ，就像你在本地调用中得到的那样。

仅在UNC路径中出现的错误正在此 GitHub 问题中进行跟踪。