functions/Read-DbaBackupHeader.ps1
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#ValidationTags#Messaging,FlowControl,Pipeline,CodeStyle# function Read-DbaBackupHeader { <# .SYNOPSIS Reads and displays detailed information about a SQL Server backup. .DESCRIPTION Reads full, differential and transaction log backups. An online SQL Server is required to parse the backup files and the path specified must be relative to that SQL Server. .PARAMETER SqlInstance The SQL Server instance to use for parsing the backup files. .PARAMETER SqlCredential Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use: $scred = Get-Credential, then pass $scred object to the -SqlCredential parameter. To connect as a different Windows user, run PowerShell as that user.i .PARAMETER Path Path to SQL Server backup file. This can be a full, differential or log backup file. Accepts valid filesystem paths and URLs. .PARAMETER Simple If this switch is enabled, fewer columns are returned, giving an easy overview. .PARAMETER FileList If this switch is enabled, detailed information about the files within the backup is returned. .PARAMETER AzureCredential Name of the SQL Server credential that should be used for Azure storage access. .PARAMETER EnableException By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch. .NOTES Tags: DisasterRecovery, Backup, Restore dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com) Copyright (C) 2016 Chrissy LeMaire License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Read-DbaBackupHeader .EXAMPLE Read-DbaBackupHeader -SqlInstance sql2016 -Path S:\backups\mydb\mydb.bak Logs into sql2016 using Windows authentication and reads the local file on sql2016, S:\backups\mydb\mydb.bak. If you are running this command on a workstation and connecting remotely, remember that sql2016 cannot access files on your own workstation. .EXAMPLE Read-DbaBackupHeader -SqlInstance sql2016 -Path \\nas\sql\backups\mydb\mydb.bak, \\nas\sql\backups\otherdb\otherdb.bak Logs into sql2016 and reads two backup files - mydb.bak and otherdb.bak. The SQL Server service account must have rights to read this file. .EXAMPLE Read-DbaBackupHeader -SqlInstance . -Path C:\temp\myfile.bak -Simple Logs into the local workstation (or computer) and shows simplified output about C:\temp\myfile.bak. The SQL Server service account must have rights to read this file. .EXAMPLE $backupinfo = Read-DbaBackupHeader -SqlInstance . -Path C:\temp\myfile.bak $backupinfo.FileList Displays detailed information about each of the datafiles contained in the backupset. .EXAMPLE Read-DbaBackupHeader -SqlInstance . -Path C:\temp\myfile.bak -FileList Also returns detailed information about each of the datafiles contained in the backupset. .EXAMPLE "C:\temp\myfile.bak", "\backupserver\backups\myotherfile.bak" | Read-DbaBackupHeader -SqlInstance sql2016 Similar to running Read-DbaBackupHeader -SqlInstance sql2016 -Path "C:\temp\myfile.bak", "\backupserver\backups\myotherfile.bak" .EXAMPLE Get-ChildItem \\nas\sql\*.bak | Read-DbaBackupHeader -SqlInstance sql2016 Gets a list of all .bak files on the \\nas\sql share and reads the headers using the server named "sql2016". This means that the server, sql2016, must have read access to the \\nas\sql share. .EXAMPLE Read-DbaBackupHeader -Path https://dbatoolsaz.blob.core.windows.net/azbackups/restoretime/restoretime_201705131850.bak -AzureCredential AzureBackupUser Gets the backup header information from the SQL Server backup file stored at https://dbatoolsaz.blob.core.windows.net/azbackups/restoretime/restoretime_201705131850.bak on Azure #> [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSAvoidUsingPlainTextForPassword", '')] <# AzureCredential is utilized in this command is not a formal Credential object. #> [CmdletBinding()] param ( [parameter(Mandatory = $true)] [Alias("ServerInstance", "SqlServer")] [DbaInstance]$SqlInstance, [PsCredential]$SqlCredential, [parameter(Mandatory = $true, ValueFromPipeline = $true)] [object[]]$Path, [switch]$Simple, [switch]$FileList, [string]$AzureCredential, [Alias('Silent')] [switch]$EnableException ) begin { $loopCnt = 1 try { $server = Connect-SqlInstance -SqlInstance $SqlInstance -SqlCredential $SqlCredential } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue return } } process { if (Test-FunctionInterrupt) { return } $pathCount = $Path.Length Write-Message -Level Verbose -Message "$pathCount files to scan." foreach ($file in $Path) { if ($null -ne $file.FullName) { $file = $file.FullName } Write-Progress -Id 1 -Activity Updating -Status 'Progress' -CurrentOperation "Scanning Restore headers on File $loopCnt - $file." Write-Message -Level Verbose -Message "Scanning file $file." $restore = New-Object Microsoft.SqlServer.Management.Smo.Restore if ($file -like 'http*') { $deviceType = 'URL' $restore.CredentialName = $AzureCredential } else { $deviceType = 'FILE' } $device = New-Object Microsoft.SqlServer.Management.Smo.BackupDeviceItem $file, $deviceType $restore.Devices.Add($device) if ((Test-DbaSqlPath -SqlInstance $server -Path $file) -or $deviceType -eq 'URL') { try { $dataTable = $restore.ReadBackupHeader($server) } catch { if ($deviceType -eq 'FILE') { Stop-Function -Message "Problem found with $file." -Target $file -ErrorRecord $_ -Exception $_.Exception.InnerException.InnerException -Continue } else { Stop-Function -Message "Unable to read $file, check credential $AzureCredential and network connectivity." -Target $file -ErrorRecord $_ -Excpetion $_.Exception.InnerException.InnerException -Continue } } $null = $dataTable.Columns.Add("FileList", [object]) $mb = $dataTable.Columns.Add("BackupSizeMB", [int]) $mb.Expression = "BackupSize / 1024 / 1024" $gb = $dataTable.Columns.Add("BackupSizeGB") $gb.Expression = "BackupSizeMB / 1024" if ($null -eq $dataTable.Columns['CompressedBackupSize']) { $formula = "0" } else { $formula = "CompressedBackupSize / 1024 / 1024" } $cmb = $dataTable.Columns.Add("CompressedBackupSizeMB", [int]) $cmb.Expression = $formula $cgb = $dataTable.Columns.Add("CompressedBackupSizeGB") $cgb.Expression = "CompressedBackupSizeMB / 1024" $null = $dataTable.Columns.Add("SqlVersion") $null = $dataTable.Columns.Add("BackupPath") $dbVersion = $dataTable.Rows[0].DatabaseVersion $backupSlot = 1 foreach ($row in $dataTable) { $row.SqlVersion = (Convert-DbVersionToSqlVersion $dbVersion) $row.BackupPath = $file try { $restore.FileNumber = $backupSlot <# Select-Object does a quick and dirty conversion from datatable to PS object #> $allFiles = $restore.ReadFileList($server) | Select-Object * } catch { $shortName = Split-Path $file -Leaf if (!(Test-DbaSqlPath -SqlInstance $server -Path $file)) { Stop-Function -Message "File $shortName does not exist or you do not have permission to access it. The SQL Server service account may not have access to the source directory." -Target $file -ErrorRecord $_ -Exception $_.Exception.InnerException.InnerException -Continue } else { Stop-Function -Message "File list for $shortName could not be determined. This is likely due to the file not existing, the backup version being incompatible or unsupported, connectivity issues or timeouts with the SQL Server, or the SQL Server service account does not have access to the source directory." -Target $file -ErrorRecord $_ -Exception $_.Exception.InnerException.InnerException -Continue } } $row.FileList = $allFiles $backupSlot++ } } else { Write-Message -Level Warning -Message "File $shortName does not exist or access denied. The SQL Server service account may not have access to the source directory." } if ($Simple) { $dataTable | Select-Object DatabaseName, BackupFinishDate, RecoveryModel, BackupSizeMB, CompressedBackupSizeMB, DatabaseCreationDate, UserName, ServerName, SqlVersion, BackupPath } elseif ($FileList) { $dataTable.filelist } else { $dataTable } Remove-Variable dataTable -ErrorAction SilentlyContinue } $loopCnt++ } } |