PowerShell ForEach - 正在使用的并行文件

Question

我有一个带有并行循环的简单工作流程，但在写出结果时遇到错误。因为写输出是并行的。我收到错误:

The process cannot access the file because it is being used by another process.

这是我的脚本:

workflow Get-ServerServices 
{
    $srvlst = Get-Content C:\TEMP\srvlst.txt

    foreach -parallel ($srv in $srvlst)
    {
         Get-Service -PSComputerName $srv | Out-File c:\temp\test.txt -Append

    }

}

有什么想法吗？

Answer 1

我建议写入临时文件。您可以执行类似以下代码的操作:

workflow Get-ServerServices 
{
    #Get the temp path of the context user
    $TempPath = Join-Path -Path $([System.IO.Path]::GetTempPath()) -ChildPath "ServerServices"
    New-Item -Path $TempPath -ItemType Directory # and create a new sub directory
    $srvlst = Get-Content C:\TEMP\srvlst.txt

    foreach -parallel ($srv in $srvlst)
    {
        $TempFileName = [System.Guid]::NewGuid().Guid + ".txt" #GUID.txt will ensure randomness
        $FullTempFilePath = Join-Path -Path $TempPath -ChildPath $TempFileName
        Get-Service -PSComputerName $srv | Out-File -Path $FullTempFilePath -Force #Write out to the random file
    }

    $TempFiles = Get-ChildItem -Path $TempPath
    foreach ($TempFile in $TempFiles) {
        Get-Content -Path $TempFile.FullName | Out-File C:\temp.txt -Append #concatenate all the files
    }

    Remove-Item -Path $TempPath -Force -Recurse #clean up
}

基本上，您正在获取临时目录，附加一个新目录，在您的输出中添加一堆 GUID 命名的文本文件，将它们全部连接成一个，然后将它们全部删除