functions/Invoke-DbaAdvancedRestore.ps1
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Function Invoke-DbaAdvancedRestore{ <# .SYNOPSIS Allows the restore of modified BackupHistory Objects For 90% of users Restore-DbaDatabase should be your point of access to this function. The other 10% use it at their own risk .DESCRIPTION This is the final piece in the Restore-DbaDatabase Stack. Uusally a BackupHistory object will arrive here from Restore-DbaDatabse via the following pipeline: Get-DbaBackupInformation | Select-DbaBackupInformation | Format-DbaBackupInformation | Test-DbaBackupInformation | Invoke-DbaAdvancedRestore We have exposed these functions publically to allow advanced users to perform operations that we don't support, or won't add as they would make things too complex for the majority of our users For example if you wanted to do some very complex redirection during a migration, then doing the rewrite of destinations may be better done with your own custom scripts rather than via Format-DbaBackupInformation We would recommend ALWAYS pushing your input through Test-DbaBackupInformation just to make sure that it makes sense to us. .PARAMETER BackupHistory The BackupHistory object to be restored. Can be passed in on the pipeline .PARAMETER SqlInstance The SqlInstance to which the backups should be restored .PARAMETER SqlCredential SqlCredential to be used to connect to the target SqlInstance .PARAMETER OutputScriptOnly If set, the restore will not be performed, but the T-SQL scripts to perform it will be returned .PARAMETER VerifyOnly If set, performs a Verify of the backups rather than a full restore .PARAMETER RestoreTime Point in Time to which the database should be restored. This should be the same value or earlier, as used in the previous pipeline stages .PARAMETER StandbyDirectory A folder path where a standby file should be created to put the recoverd databases in a standby mode .PARAMETER NoRecovery Leave the database in a restoring state so that further restore may be made .PARAMETER MaxTransferSize Parameter to set the unit of transfer. Values must be a multiple by 64kb .PARAMETER Blocksize Specifies the block size to use. Must be one of 0.5kb,1kb,2kb,4kb,8kb,16kb,32kb or 64kb Can be specified in bytes Refer to https://msdn.microsoft.com/en-us/library/ms178615.aspx for more detail .PARAMETER BufferCount Number of I/O buffers to use to perform the operation. Refer to https://msdn.microsoft.com/en-us/library/ms178615.aspx for more detail .PARAMETER Continue Indicates that the restore is continuing a restore, so target database must be in Recovering or Standby states .PARAMETER AzureCredential AzureCredential required to connect to blob storage holding the backups .PARAMETER WithReplace Indicated that if the database already exists it should be replaced .PARAMETER WhatIf Shows what would happen if the cmdlet runs. The cmdlet is not run. .PARAMETER Confirm Prompts you for confirmation before running the cmdlet. .PARAMETER EnableException Replaces user friendly yellow warnings with bloody red exceptions of doom! Use this if you want the function to throw terminating errors you want to catch. .EXAMPLE $BackupHistory | Invoke-DbaAdvancedRestore -SqlInstance MyInstance Will restore all the backups in the BackupHistory object according to the transformations it contains .EXAMPLE $BackupHistory | Invoke-DbaAdvancedRestore -SqlInstance MyInstance -OutputScriptOnly $BackupHistory | Invoke-DbaAdvancedRestore -SqlInstance MyInstance First generates just the T-SQL restore scripts so they can be sanity checked, and then if they are good perform the full restore. By reusing the BackupHistory object there is no need to rescan all the backup files again #> [CmdletBinding(SupportsShouldProcess = $true, ConfirmImpact = "Low")] param ( [parameter(Mandatory = $true, ValueFromPipeline = $true)] [Object[]]$BackupHistory, [Alias("ServerInstance", "SqlServer")] [DbaInstanceParameter]$SqlInstance, [PSCredential]$SqlCredential, [switch]$OutputScriptOnly, [switch]$VerifyOnly, [datetime]$RestoreTime=(Get-Date).AddDays(2), [string]$StandbyDirectory, [switch]$NoRecovery, [int]$MaxTransferSize, [int]$BlockSize, [int]$BufferCount, [switch]$Continue, [PSCredential]$AzureCredential, [switch]$WithReplace, [switch]$EnableException ) begin{ try { $server = Connect-SqlInstance -SqlInstance $SqlInstance -SqlCredential $SqlCredential } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue return } $ScriptOnly = $false $InternalHistory = @() } Process{ ForEach ($bh in $BackupHistory){ $InternalHistory += $bh } } end{ $Databases = $InternalHistory.Database | select-Object -unique ForEach ($Database in $Databases){ If ($Database -in $Server.databases.name) { if (($ScriptOnly -eq $true) -or ($verifyonly -ne $true)) { if ($Pscmdlet.ShouldProcess("Killing processes in $Database on $SqlInstance as it exists and WithReplace specified `n", "Cannot proceed if processes exist, ", "Database Exists and WithReplace specified, need to kill processes to restore")) { try { Write-Message -Level Verbose -Message "Set $Database single_user to kill processes" $null = Stop-DbaProcess -SqlInstance $Server -Database $Database -WarningAction Silentlycontinue $null = $server.Query("Alter database $Database set offline with rollback immediate; alter database $Database set restricted_user; Alter database $Database set online with rollback immediate",'master') $server.ConnectionContext.Connect() } catch { Write-Message -Level Verbose -Message "No processes to kill in $Database" } } } else { Stop-Function -Message "$Database exists and WithReplace not specified, stopping" -EnableException $EnableException return } } Write-Message -Message "WithReplace = $Withreplace" -Level Verbose $backups = $InternalHistory | Where-Object {$_.Database -eq $Database} | Sort-Object -Property Type, FirstLsn ForEach ($backup in $backups){ $Restore = New-Object Microsoft.SqlServer.Management.Smo.Restore if (($backup -ne $backups[-1] -and $StandbyDirectory -eq '') -or $true -eq $NoRecovery){ $Restore.NoRecovery = $True }elseif ($backup -eq $backups[-1] -and '' -ne $StandbyDirectory) { $Restore.StandbyFile = $StandByDirectory + "\" + $Database + (get-date -Format yyyMMddHHmmss) + ".bak" Write-Message -Level Verbose -Message "Setting standby on last file $($Restore.StandbyFile)" } else { $Restore.NoRecovery = $False } if ($restoretime -gt (Get-Date)) { $Restore.ToPointInTime = $null } else { $Restore.ToPointInTime = $RestoreTime } $Restore.Database = $database $Restore.ReplaceDatabase = $WithReplace if ($MaxTransferSize) { $Restore.MaxTransferSize = $MaxTransferSize } if ($BufferCount) { $Restore.BufferCount = $BufferCount } if ($BlockSize) { $Restore.Blocksize = $BlockSize } if ($true -ne $Continue){ ForEach ($file in $backup.FileList){ $MoveFile = New-Object Microsoft.SqlServer.Management.Smo.RelocateFile $MoveFile.LogicalFileName = $File.LogicalName $MoveFile.PhysicalFileName = $File.PhysicalName $null = $Restore.RelocateFiles.Add($MoveFile) } } $Action = switch ($backup.Type) { '1' {'Database'} '2' {'Log'} '5' {'Database'} 'Transaction Log' {'Log'} Default {'Database'} } Write-Message -Level Verbose -Message "restore action = $Action" $Restore.Action = $Action ForEach ($File in $backup.fullname){ Write-Message -Message "Adding device $file" -Level verbose $Device = New-Object -TypeName Microsoft.SqlServer.Management.Smo.BackupDeviceItem $Device.Name = $file if ($file -like "http*") { $Device.devicetype = "URL" $Restore.CredentialName = $AzureCredential } else { $Device.devicetype = "File" } $Restore.FileNumber = $backup.Position $Restore.Devices.Add($device) } Write-Message -Level Verbose -Message "Performing restore action" $ConfirmMessage = "`n Restore Database $Database on $SqlInstance `n from files: $RestoreFileNames `n with these file moves: `n $LogicalFileMovesString `n $ConfirmPointInTime `n" If ($Pscmdlet.ShouldProcess("$Database on $SqlInstance `n `n", $ConfirmMessage)) { try { $RestoreComplete = $true if ($OutputScriptOnly) { $script = $Restore.Script($server) } elseif ($VerifyOnly) { Write-Progress -id 2 -activity "Verifying $Database backup file on $sqlinstance" -percentcomplete 0 -status ([System.String]::Format("Progress: {0} %", 0)) $Verify = $Restore.sqlverify($server) Write-Progress -id 2 -activity "Verifying $Database backup file on $sqlinstance" -status "Complete" -Completed if ($verify -eq $true) { return "Verify successful" } else { return "Verify failed" } } else { Write-Progress -id 2 -activity "Restoring $Database to $sqlinstance" -percentcomplete 0 -status ([System.String]::Format("Progress: {0} %", 0)) $script = $Restore.Script($Server) $Restore.sqlrestore($Server) Write-Progress -id 2 -activity "Restoring $Database to $sqlinstance" -status "Complete" -Completed } } catch { Write-Message -Level Verbose -Message "Failed, Closing Server connection" $RestoreComplete = $False $ExitError = $_.Exception.InnerException Stop-Function -Message "Failed to restore db $Database, stopping" -ErrorRecord $_ return } finally { if ($OutputScriptOnly -eq $false) { [PSCustomObject]@{ SqlInstance = $SqlInstance DatabaseName = $backup.Database DatabaseOwner = $server.ConnectionContext.TrueLogin NoRecovery = $Restore.NoRecovery WithReplace = $WithReplace RestoreComplete = $RestoreComplete BackupFilesCount = $backup.FullName.Count RestoredFilesCount = $backup.Filelist.PhysicalName.count BackupSizeMB = if ([bool]($backup.psobject.Properties.Name -contains 'BackupSizeMB')) { ($RestoreFiles | Measure-Object -Property BackupSizeMB -Sum).Sum } else { $null } CompressedBackupSizeMB = if ([bool]($backup.psobject.Properties.Name -contains 'CompressedBackupSizeMb')) { ($RestoreFiles | Measure-Object -Property CompressedBackupSizeMB -Sum).Sum } else { $null } BackupFile = $backup.FullName -Join ',' RestoredFile = $((Split-Path $backup.FileList.PhysicalName -Leaf) | Sort-Object -Unique) -Join ',' RestoredFileFull = ($backup.Filelist.PhysicalName -Join ',') RestoreDirectory = ((Split-Path $backup.FileList.PhysicalName) | Sort-Object -Unique) -Join ',' BackupSize = if ([bool]($backup.psobject.Properties.Name -contains 'BackupSize')) { ($RestoreFiles | Measure-Object -Property BackupSize -Sum).Sum } else { $null } CompressedBackupSize = if ([bool]($backup.psobject.Properties.Name -contains 'CompressedBackupSize')) { ($RestoreFiles | Measure-Object -Property CompressedBackupSize -Sum).Sum } else { $null } Script = $script BackupFileRaw = $RestoreFiles ExitError = $ExitError } | Select-DefaultView -ExcludeProperty BackupSize, CompressedBackupSize, ExitError, BackupFileRaw, RestoredFileFull } else { $script } while ($Restore.Devices.count -gt 0) { $device = $Restore.devices[0] $null = $Restore.devices.remove($Device) } Write-Message -Level Verbose -Message "Succeeded, Closing Server connection" $server.ConnectionContext.Disconnect() } } Write-Progress -id 1 -Activity "Restoring" -Completed } if ($server.ConnectionContext.exists) { $server.ConnectionContext.Disconnect() } } } } |