powershell - 当传递给invoke-command时，Powershell 7 ForEach-Object Parallel会中断自动变量

Question

请告知，我需要做些什么才能成功传递变量，我们将不胜感激。

这可以成功工作，但是一次可以处理管道列表中的每个FQDN。我有100多台服务器，因此所需的时间可能比人们想象的要长。例如每台服务器1-6秒

    Write-Host "Confirm correct OS is installed" -ForegroundColor Yellow -BackgroundColor Black

    $FQDNs | ForEach-Object {
        Invoke-Command -ComputerName $_ -Credential $Credentials -ScriptBlock { 
            $OS = (Get-CimInstance -ClassName CIM_OperatingSystem).Caption
            Write-Host "$Using:_`: $OS" -ForegroundColor Green -BackgroundColor Black
            Write-Output "$Using:_`: $OS"
        }
    }
} 

如果我添加-Parallel参数，它将立即失败并显示以下错误。如果自动变量是我看到foreach-object用管道传递它们的唯一方式，那么我应该怎么给变量呢？ (我希望那是错误的)

ForEach-Object: C:\Scripts\Checklist.ps1:53
Line |
  53 |      $FQDNs | ForEach-Object -Parallel {
     |               ~~~~~~~~~~~~~~~~~~~~~~~~~~
     | The value of the using variable '$using:_' cannot be retrieved because
     | it has not been set in the local session.

这是插入Parallel参数的脚本，以准确显示我在哪里执行此操作

    Write-Host "Confirm correct OS is installed" -ForegroundColor Yellow -BackgroundColor Black

    $FQDNs | ForEach-Object -Parallel {
        Invoke-Command -ComputerName $_ -Credential $Credentials -ScriptBlock { 
            $OS = (Get-CimInstance -ClassName CIM_OperatingSystem).Caption
            Write-Host "$Using:_`: $OS" -ForegroundColor Green -BackgroundColor Black
            Write-Output "$Using:_`: $OS"
        }
    }
}

Answer 1

调用命令计算机名comp1，comp2，comp3已并行运行。

# elevated prompt
start-service winrm
invoke-command localhost,localhost,localhost { sleep 10 } 
(get-history)[-1] | fl

Id                 : 3
CommandLine        :     invoke-command localhost,localhost,localhost { sleep 10 }
ExecutionStatus    : Completed
StartExecutionTime : 6/19/2020 10:05:02 AM
EndExecutionTime   : 6/19/2020 10:05:13 AM  # 11 seconds for all three