将SQL Server数据库从一台服务器还原到另一台服务器的PowerShell脚本具有不同的驱动器

Question

我正在尝试编写一个脚本，该脚本将数据库从远程计算机还原到新的SQL Server。 我的旧SQL Server的数据驱动器的卷为D:而新的SQL Server的数据驱动器的卷为E:那么有人可以帮助我将数据库从PS还原到其他驱动器位置吗？

备份放置在新的SQL Server E:\\migration文件夹中，该文件夹是我尝试还原的位置。 以下是我尝试过的与相同文件夹结构搭配使用的效果。

# Defining the server Name

Write-Host " Initiating the SQL Server Install"
$Servers = Read-Host "Please specify DB Server Name"

Invoke-Command -ComputerName $Servers{

$INSTANCENAME = Read-Host "Please specify DB Server Instance Name , ex:- DBXXXXINST01"
$VOLNAME = Read-Host "Please specify DB Server InstanceVolume Name , ex:- XXXXINST01"

$ServerInstance = Read-Host "Please specify DB Server Instance Name , ex:- dbxx\DBXXXXINST01"

import-module SQLPS -DisableNameChecking

Write-Host " Initiating the DB creation/configuration"
Write-Host "Creating SQL folder"

$setupFolder = "E:\$VOLNAME\SQL"

New-Item -Path $setupFolder -type directory -Force 

$backupRoot = Get-ChildItem -Path "E:\migration\DB_Backup\1234inst01\"
$datafilesDest = "E:\$VOLNAME\SQL\"
$logfilesDest = "E:\$VOLNAME\SQL\"

## For each folder in the backup root directory...
#
foreach($folder in $backupRoot)
{   
    # Get the most recent .bak files for all databases...
    $backupFiles = Get-ChildItem -Path $folder.FullName -Filter "*.bak" -Recurse | Sort-Object -Property CreationTime -Descending | Select-Object -First 1

    # For each .bak file...
    foreach ($backupFile in $backupFiles)
    {
        # Restore the header to get the database name...
        $query = "RESTORE HEADERONLY FROM DISK = N'"+$backupFile.FullName+"'"
        $headerInfo = Invoke-Sqlcmd -ServerInstance $ServerInstance -Query $query
        $databaseName = $headerInfo.DatabaseName

        # Restore the file list to get the logical filenames of the database files...
        $query = "RESTORE FILELISTONLY FROM DISK = N'"+$backupFile.FullName+"'"
        $files = Invoke-Sqlcmd -ServerInstance $ServerInstance -Query $query

        # Differentiate data files from log files...
        $dataFile = $files | Where-Object -Property Type -EQ "D"
        $logFile = $files | Where-Object -Property Type -EQ "L"

        # Set some variables...
        $dataFileName = $dataFile.LogicalName
        $logFileName = $logFile.LogicalName

        # Set the destination of the restored files...
        $dataFileFullPath = $datafilesDest+"\"+$dataFileName+".mdf"
        $logFileFullPath = $logfilesDest+"\"+$logFileName+".ldf"

        # Perform the database restore... and then go around the loop.
        Restore-SqlDatabase -ServerInstance $ServerInstance -Database $databaseName -BackupFile $backupFile.FullName -ReplaceDatabase
    }
} 

Answer 1

您应该能够使用Restore-SqlDatabase的RelocateFile选项来实现此目的。

我尚未对此进行测试，但是如果您对新的物理文件名感到满意，则您的问题代码构造应该可以正常工作：

$relocateData = New-Object Microsoft.SqlServer.Management.Smo.RelocateFile($dataFile.LogicalName, $dataFileFullPath)
$relocateLog = New-Object Microsoft.SqlServer.Management.Smo.RelocateFile($logFile.LogicalName, $logFileFullPath)

Restore-SqlDatabase -ServerInstance $ServerInstance -Database $databaseName -BackupFile $backupFile.FullName -ReplaceDatabase -RelocateFile @($relocateData, $relocateLog)

编辑：

根据powershell sql模块的配置，如果powershell将RelocateFile对象实例化为错误的版本，则此操作可能会失败。

解决方法是通过检查实现Restore-SqlDatabase命令的程序集版本来强制版本匹配。