无法将 Ping 响应添加到输出变量

Question

我已经编写了一个脚本来使用服务器 ping 响应导出特定的注册表项和其中的子项，但是我的脚本按预期工作但是当我将它添加到输出时 ping 响应值给出空值

请帮我获取每个服务器的 ping 响应值。

## Clear the host
Clear-Host

## Install Export-Excel Module if it is not installed
If (-Not (Get-InstalledModule -Name ImportExcel)){
Install-Module -Name ImportExcel -ErrorAction SilentlyContinue -Force 
}

## Set Script Location
Set-Location $PSScriptRoot

## Out File Name
$FileName = "$PSScriptRoot\TCPIP_Interface_Details.xlsx"

## Get full list of servers
$Servers = GC -Path ".\Servers.txt"

## Delete if Old file exists
if (Test-Path $FileName) { Remove-Item $FileName
       write-host "$FileName has been deleted" -BackgroundColor DarkMagenta }
else { Write-host "$FileName doesn't exist" -BackgroundColor Red }

## Loop through each server
$Result = foreach ($vm in $Servers) {

## Check the Ping reponse for each server
Write-Host "Pinging Server" $vm
$Ping = Test-Connection -Server $vm -Quiet -Verbose 
    if ($Ping){Write-host "Server" $vm "is Online" -BackgroundColor Green}
    else{Write-host "Unable to ping Server" $vm -BackgroundColor Red}

## Check the Network Share path Accessibility
Write-Host "Checking Share Path on" $vm
$SharePath = Test-Path "\$vm\E$" -Verbose
    if ($SharePath){Write-host "Server" $vm "Share Path is Accessible" -BackgroundColor Green}
    else{Write-host "Server" $vm "Share path access failed" -BackgroundColor Red}

Invoke-Command -ComputerName $vm {

## Get ChildItems under HKLM TCPIP Parameter Interface
Get-ChildItem -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces' | ForEach-Object {
          Get-ItemProperty -Path $_.PSPath | Where-Object { $_.PsObject.Properties.Name -like 'Dhcp*' }
 } | Select-Object -Property @{Name = 'ComputerName'; Expression = {$env:COMPUTERNAME+"."+$env:USERDNSDOMAIN}},
                             @{Name = 'Ping_Response'; Expression = {if($using:Ping) {'Pinging'} else {'Unable to ping'}}}, 
                             @{Name = 'Share_Path_Access'; Expression = {if($using:SharePath) {'Accessible'} else {'Not Accessible'}}},
              DhcpIPAddress, @{Name = 'DhcpNameServer'; Expression = {$_.DhcpNameServer -split ' ' -join '; '}},
              DhcpServer,    @{Name = 'DhcpDefaultGateway'; Expression = {$_.DhcpDefaultGateway -join '; '}}
}}
$Result | Select-Object * -Exclude PS*, RunspaceId

Answer 1

如评论所述，只需将计算的属性更改为

@{Name = 'Ping_Response'; Expression = {$using:Ping}}

通过用 using: 限定变量 $Ping 的范围，它将在 Invoke-Command 的脚本块中已知。如果没有它，scritblock 只会将其视为新的未定义变量（即 $null）

如果正如您所评论的那样，您更愿意看到一些文本而不只是 True 或 False，请在计算出的属性输出中包含任何您想要的表达式：

@{Name = 'Ping_Response'; Expression = {if($using:Ping) {'Pinging'} else {'Unable to ping'}}}

让脚本块知道 $Ping 是什么的另一种方法是将其作为参数添加到命令中：

Invoke-Command -ComputerName $vm {
    param([bool]$Ping)
    # ... the rest of the scriptblock
    # now, you do not have to use the `using:` scope on $Ping
} -ArgumentList $Ping

为了回答您的最新评论，如果对机器执行 ping 操作无效，则确实没有理由尝试使用 Invoke-Command 从中获取属性。如果您还想在输出中包含 non-pingables，请执行：

$result = foreach ($vm in $Servers) {
    $Ping = Test-Connection -Server $vm -Quiet -Verbose 
    if ($Ping) {
        # we can reach this machine, so gather the properties we need and output an object
        # the 'Ping_Response 'can now be hardcoded
        Invoke-Command -ComputerName $vm -ScriptBlock {
            Get-ChildItem -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces' | ForEach-Object {
                Get-ItemProperty -Path $_.PSPath | Where-Object { $_.PsObject.Properties.Name -like 'Dhcp*' }
            }
        } | 
        Select-Object -Property @{Name = 'ComputerName'; Expression = {$_.PSComputerName}}, 
                                @{Name = 'Ping_Response'; Expression = { 'Pinging' }}, 
                                DhcpIPAddress,
                                @{Name = 'DhcpNameServer'; Expression = {$_.DhcpNameServer -split ' ' -join '; '}},
                                DhcpServer, 
                                @{Name = 'DhcpDefaultGateway'; Expression = {$_.DhcpDefaultGateway -join '; '}}
    }
    else {
        # return a similar object for machines that didn't respond to Ping
        # since we cannot reach this machine, most properties will be empty
        '' | Select-Object -Property @{Name = 'ComputerName'; Expression = {$vm}}, 
                                     @{Name = 'Ping_Response'; Expression = { 'Unable to ping' }},
                                     DhcpIPAddress,DhcpNameServer,DhcpServer,DhcpDefaultGateway
    }
}
# output the results
$result | Select-Object * -ExcludeProperty PS*, RunspaceId | Export-Csv -Path "C:\temp\TCPIP_Interface_Details.csv" -NoTypeInformation

无法将 Ping 响应添加到输出变量

Unable to add the Ping Response to Output variable

registry

powershell

ping

regedit