函数和 powershell 远程处理

Question

我有一个运行良好的脚本，但我想提高我的 powershell 知识，并想知道是否有更简单的方法来做到这一点......

我的部分脚本连接到服务器并提取其中的文件和大小列表并将其导出到 csv。

我找到了一个函数 (Exportcsv)，它允许我使用早期版本的 powershell 附加到 csv。

目前我使用 invoke-command 远程连接到每台服务器和运行脚本块中的脚本，但这意味着每次都添加函数。所以我在我的脚本中有这个功能但是必须为我连接的每个服务器重复它所以它会运行远程

有什么方法可以将本地函数传递给远程服务器，这样我就不必添加到每个调用命令中了。

Invoke-Command –ComputerName server –ScriptBlock {
$wfile = "d:\folder\directorysize_H.csv"
$xfile = "d:\folder\directorysize_F.csv"

function ExportCSV {
[CmdletBinding(DefaultParameterSetName='Delimiter',
  SupportsShouldProcess=$true, ConfirmImpact='Medium')]
param(
 [Parameter(Mandatory=$true, ValueFromPipeline=$true,
           ValueFromPipelineByPropertyName=$true)]
 [System.Management.Automation.PSObject]
 ${InputObject},

 [Parameter(Mandatory=$true, Position=0)]
 [Alias('PSPath')]
 [System.String]
 ${Path},

 #region -Append
 [Switch]
 ${Append},
 #endregion 

 [Switch]
 ${Force},

 [Switch]
 ${NoClobber},

 [ValidateSet('Unicode','UTF7','UTF8','ASCII','UTF32',
                  'BigEndianUnicode','Default','OEM')]
 [System.String]
 ${Encoding},

 [Parameter(ParameterSetName='Delimiter', Position=1)]
 [ValidateNotNull()]
 [System.Char]
 ${Delimiter},

 [Parameter(ParameterSetName='UseCulture')]
 [Switch]
 ${UseCulture},

 [Alias('NTI')]
 [Switch]
 ${NoTypeInformation})

begin
{
 # This variable will tell us whether we actually need to append
 # to existing file
 $AppendMode = $false

 try {
  $outBuffer = $null
  if ($PSBoundParameters.TryGetValue('OutBuffer', [ref]$outBuffer))
  {
      $PSBoundParameters['OutBuffer'] = 1
  }
  $wrappedCmd = $ExecutionContext.InvokeCommand.GetCommand('Export-Csv',
    [System.Management.Automation.CommandTypes]::Cmdlet)


 #String variable to become the target command line
 $scriptCmdPipeline = ''

 # Add new parameter handling
 #region Process and remove the Append parameter if it is present
 if ($Append) {

  $PSBoundParameters.Remove('Append') | Out-Null

  if ($Path) {
   if (Test-Path $Path) {        
    # Need to construct new command line
    $AppendMode = $true

    if ($Encoding.Length -eq 0) {
     # ASCII is default encoding for Export-CSV
     $Encoding = 'ASCII'
    }

    # For Append we use ConvertTo-CSV instead of Export
    $scriptCmdPipeline += 'ConvertTo-Csv -NoTypeInformation '

    # Inherit other CSV convertion parameters
    if ( $UseCulture ) {
     $scriptCmdPipeline += ' -UseCulture '
    }
    if ( $Delimiter ) {
     $scriptCmdPipeline += " -Delimiter '$Delimiter' "
    } 

    # Skip the first line (the one with the property names) 
    $scriptCmdPipeline += ' | Foreach-Object {$start=$true}'
    $scriptCmdPipeline += '{if ($start) {$start=$false} else {$_}} '

    # Add file output
    $scriptCmdPipeline += " | Out-File -FilePath '$Path'"
    $scriptCmdPipeline += " -Encoding '$Encoding' -Append "

    if ($Force) {
     $scriptCmdPipeline += ' -Force'
    }

    if ($NoClobber) {
     $scriptCmdPipeline += ' -NoClobber'
    }   
   }
  }
 } 



 $scriptCmd = {& $wrappedCmd @PSBoundParameters }

 if ( $AppendMode ) {
  # redefine command line
  $scriptCmd = $ExecutionContext.InvokeCommand.NewScriptBlock(
      $scriptCmdPipeline
    )
 } else {
  # execute Export-CSV as we got it because
  # either -Append is missing or file does not exist
  $scriptCmd = $ExecutionContext.InvokeCommand.NewScriptBlock(
      [string]$scriptCmd
    )
 }

 # standard pipeline initialization
 $steppablePipeline = $scriptCmd.GetSteppablePipeline(
        $myInvocation.CommandOrigin)
 $steppablePipeline.Begin($PSCmdlet)

 } catch {
   throw
 }

}

process
{
  try {
      $steppablePipeline.Process($_)
  } catch {
      throw
  }
}

end
{
  try {
      $steppablePipeline.End()
  } catch {
      throw
  }
}
}

Write-Host "Removing old files from xxx"

If (Test-Path $wfile){
            Remove-Item $wfile
            } 

If (Test-Path $xfile){
            Remove-Item $xfile
            } 

write-host "Getting _f details"
get-childitem \server\F$ -recurse |select directory, name, length|exportcsv $xfile -append -noclobber -notypeinformation 
write-host "Getting _H details"
get-childitem \server\H$ -recurse |select directory, name, length|exportcsv $wfile -append -noclobber -notypeinformation    
}

TIA

安迪

Answer 1

不，除了您已经在做的事情之外，没有一种直接的方法可以将函数传递给远程计算机。 :-) 但是，您可以将所有脚本放在一个文件中 (dirsize.ps1)，然后使用 FilePath 参数将其传递给 Invoke-Command：

Invoke-Command –ComputerName server –FilePath .\dirsize.ps1

文件将被复制到远程计算机并执行。

Answer 2

试试这个：

#Local Function
function Get-Bits
{
    Get-Service -Name BITS
}

Invoke-Command -ComputerName RemoteServer -ScriptBlock ${function:Get-Bits}

就我个人而言，我将所有函数放在一个 psm1 文件中，换句话说，一个网络共享上的模块，并在远程会话中导入该模块。

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