使用凭据打破脚本块

Question

概述：这是一个 PowerShell 脚本，用于自动执行 SQL 数据库备份，必须尽可能并行完成。

这很好用。

$ServerInstanceSource = ".\INSTANCE01"
$ServerInstanceDestination = ".\INSTANCE02"
$UserName = 'user'
$PassWord = 'pass'

$GetDBs = Invoke-Sqlcmd -ServerInstance $ServerInstanceSource -Username $UserName -Password $Password -Database tempdb -Query "SELECT name FROM sys.databases WHERE database_id > 4 AND recovery_model_desc != 'SIMPLE'"
$Date =  (Get-Date -Format 'yyyyMMddhhmmss')
$BackupSourceDirectory = 'F:\DB-BACKUP\SQLBACKUP\Manual Logshipping Restoration\'
$BackupDestinationDirectory = 'D:\BACKUPS\'

Get-Job | Remove-Job -Force

Write-Output "Creating FULL backup. . ."

ForEach($db in $GetDBs.name){
    $FileName = "FULL-$db-$Date.bak"
    $FullBackupPath = Join-Path -Path $BackupSourceDirectory -ChildPath $FileName
    $BackupFullScript = "BACKUP DATABASE $db TO DISK = N'$FullBackupPath' WITH NOFORMAT, NOINIT,  NAME = N'$db-FULL Database Backup', SKIP, NOREWIND, NOUNLOAD, COMPRESSION,  STATS = 10"
    $SQLBackupFull = "Invoke-Sqlcmd -ServerInstance $ServerInstanceSource -Username $UserName -Password $Password -Database tempdb -Query `"$BackupFullScript`" -QueryTimeout 21600;" # 5 hours
    [scriptblock]$cmdblock1 = [ScriptBlock]::Create($SQLBackupFull)
    Start-Job $cmdblock1
}

Get-Job | Wait-Job
Get-Job | Receive-Job

但是，当我将代码转换为接受凭据而不是硬编码凭据时，出现错误：

$ServerInstanceSource = ".\INSTANCE01"
$ServerInstanceDestination = ".\INSTANCE02"
$Cred = Get-Credential

$GetDBs = Invoke-Sqlcmd -ServerInstance $ServerInstanceSource -Credential $Cred -Database tempdb -Query "SELECT name FROM sys.databases WHERE database_id > 4 AND recovery_model_desc != 'SIMPLE' -- Dynamic; Input specific databases only, if necessary."
$Date =  (Get-Date -Format 'yyyyMMddhhmmss')
$BackupSourceDirectory = 'C:\Users\edgar.bayron\Music\Edgar\Trash Can\DB-BACKUP\SQLBACKUP\LAX-DBMON\' # "F:\DB-BACKUP\SQLBACKUP\Manual Logshipping Restoration\"
$BackupDestinationDirectory = 'C:\Users\edgar.bayron\Music\Edgar\Trash Can\DB-BACKUP\SQLBACKUP\DAL-INDBS01\' # "D:\BACKUPS\"

Get-Job | Remove-Job -Force

Write-Output "Creating FULL backup. . ."

ForEach($db in $GetDBs.name){
    $FileName = "FULL-$db-$Date.bak"
    $FullBackupPath = Join-Path -Path $BackupSourceDirectory -ChildPath $FileName
    $BackupFullScript = "BACKUP DATABASE $db TO DISK = N'$FullBackupPath' WITH NOFORMAT, NOINIT,  NAME = N'$db-FULL Database Backup', SKIP, NOREWIND, NOUNLOAD, COMPRESSION,  STATS = 10"
    $SQLBackupFull = "Invoke-Sqlcmd -ServerInstance $ServerInstanceSource -Credential $Cred -Database tempdb -Query `"$BackupFullScript`" -QueryTimeout 21600;" # 5 hours
    [scriptblock]$cmdblock1 = [ScriptBlock]::Create($SQLBackupFull)
    Start-Job $cmdblock1
}

Get-Job | Wait-Job
Get-Job | Receive-Job

错误：

Wait-Job : The Wait-Job cmdlet cannot finish working, because one or more jobs are blocked waiting for user interaction.  Process interactive job 
output by using the Receive-Job cmdlet, and then try again.

我正在尝试应用推荐的 here，但我无法完全应用它，因为在示例中，它只有一个参数，而我有多个。如果我尝试应用它，它会搜索其他变量。

我尝试使用 {PARAM($ServerInstanceSource, $cred, $BackupFullScript) 但它破坏了 $BackupFullScript 中的 SQL 查询。

谁能帮我解决这个问题？

Answer 1

您正在尝试将凭据对象用作字符串。发生的事情是 $Cred 使用它的 .ToString() 方法转换为字符串，它看起来像这样 System.Management.Automation.PSCredential 当作为参数传递给 -Credential 参数时显然不起作用你的脚本块。

您可以 return 使用用户名和密码的原始实现，您可以在其中传递从 $Cred 对象

中获取的用户名和密码

$SQLBackupFull = "Invoke-Sqlcmd -ServerInstance $ServerInstanceSource -Username $($Cred.UserName) -Password $($Cred.GetNetworkCredential().Password) -Database tempdb -Query `"$BackupFullScript`" -QueryTimeout 21600;" # 5 hours

或者您可以创建一个带有 param() 块的脚本块，您可以在其中将 $Cred 对象作为参数传入

编辑 - $cmd 脚本块移出到 foreach 之前，因此它只创建一次。

$cmd = {
    param(
        $ServerInstanceSource,
        $Cred,
        $BackupFullScript
    )
    Invoke-Sqlcmd -ServerInstance $ServerInstanceSource -Credential $Cred -Database tempdb -Query $BackupFullScript -QueryTimeout 21600;
}

ForEach ($db in $GetDBs.name) {
    $FileName = "FULL-$db-$Date.bak"
    $FullBackupPath = Join-Path -Path $BackupSourceDirectory -ChildPath $FileName
    $BackupFullScript = "BACKUP DATABASE $db TO DISK = N'$FullBackupPath' WITH NOFORMAT, NOINIT,  NAME = N'$db-FULL Database Backup', SKIP, NOREWIND, NOUNLOAD, COMPRESSION,  STATS = 10"

    Start-Job $cmd -ArgumentList $ServerInstanceSource, $Cred, $BackupFullScript
}

使用凭据打破脚本块

Using Credential breaks the script block

sql-server

powershell

start-job