functions/Test-DbaLastBackup.ps1
|
function Test-DbaLastBackup { <# .SYNOPSIS Quickly and easily tests the last set of full backups for a server .DESCRIPTION Restores all or some of the latest backups and performs a DBCC CHECKTABLE 1. Gathers information about the last full backups 2. Restores the backps to the Destination with a new name. If no Destination is specified, the originating SqlServer wil be used. 3. The database is restored as "dbatools-testrestore-$databaseName" by default, but you can change dbatools-testrestore to whatever you would like using -Prefix 4. The internal file names are also renamed to prevent conflicts with original database 5. A DBCC CHECKTABLE is then performed 6. And the test database is finally dropped .PARAMETER SqlInstance The SQL Server to connect to. Unlike many of the other commands, you cannot specify more than one server. .PARAMETER Destination The destination server to use to test the restore. By default, the Destination will be set to the source server If a different Destination server is specified, you must ensure that the database backups are on a shared location .PARAMETER SqlCredential Allows you to login to servers using alternative credentials $scred = Get-Credential, then pass $scred object to the -SqlCredential parameter Windows Authentication will be used if SqlCredential is not specified .PARAMETER DestinationCredential Allows you to login to servers using alternative credentials $scred = Get-Credential, then pass $scred object to the -SqlCredential parameter Windows Authentication will be used if SqlCredential is not specified .PARAMETER Database The database backups to test. If -Database is not provided, all database backups will be tested .PARAMETER ExcludeDatabase Exclude specific Database backups to test .PARAMETER DataDirectory The command uses the SQL Server's default data directory for all restores. Use this parameter to specify a different directory for mdfs, ndfs and so on. .PARAMETER LogDirectory The command uses the SQL Server's default log directory for all restores. Use this parameter to specify a different directory for ldfs. .PARAMETER VerifyOnly Do not perform the actual restore. Just perform a VERIFYONLY .PARAMETER NoCheck Skip DBCC CHECKTABLE .PARAMETER NoDrop Do not drop newly created test database .PARAMETER CopyFile Will copy the backup file to the destination default backup location unless CopyPath is specified. .PARAMETER CopyPath Specify a path relative to the SQL Server to copy backups when CopyFile is specified. If not specified will use destination default backup location. If destination SQL Server is not local, admin UNC paths will be utilized for the copy. .PARAMETER MaxMB Do not restore databases larger than MaxMB .PARAMETER AzureCredential The name of the SQL Server credential on the destination instance that holds the key to the azure storage account fied, Copy Options are not allowed. .PARAMETER IncludeCopyOnly If set, copy only backups will not be counted as a last backup .PARAMETER IgnoreLogBackup This switch tells the function to ignore transaction log backups. The process will restore to the latest full or differential backup point only .PARAMETER Prefix The database is restored as "dbatools-testrestore-$databaseName" by default. You can change dbatools-testrestore to whatever you would like using this parameter. .PARAMETER WhatIf Shows what would happen if the command were to run .PARAMETER Confirm Prompts for confirmation of every step. For example: Are you sure you want to perform this action? Performing the operation "Restoring model as dbatools-testrestore-model" on target "SQL2016\VNEXT". [Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "Y"): .PARAMETER Silent Use this switch to disable any kind of verbose messages .NOTES Tags: DisasterRecovery, Backup, Restore Website: https://dbatools.io Copyright: (C) Chrissy LeMaire, clemaire@gmail.com License: GNU GPL v3 https://opensource.org/licenses/GPL-3.0 .LINK https://dbatools.io/Test-DbaLastBackup .EXAMPLE Test-DbaLastBackup -SqlInstance sql2016 Determines the last full backup for ALL databases, attempts to restore all databases (with a different name and file structure), then performs a DBCC CHECKTABLE Once the test is complete, the test restore will be dropped .EXAMPLE Test-DbaLastBackup -SqlInstance sql2016 -Database master Determines the last full backup for master, attempts to restore it, then performs a DBCC CHECKTABLE .EXAMPLE Test-DbaLastBackup -SqlInstance sql2016 -Database model, master -VerifyOnly .EXAMPLE Test-DbaLastBackup -SqlInstance sql2016 -NoCheck -NoDrop Skips the DBCC CHECKTABLE check. This can help speed up the tests but makes it less tested. NoDrop means that the test restores will remain on the server. .EXAMPLE Test-DbaLastBackup -SqlInstance sql2016 -DataDirectory E:\bigdrive -LogDirectory L:\bigdrive -MaxMB 10240 Restores data and log files to alternative locations and only restores databases that are smaller than 10 GB .EXAMPLE Test-DbaLastBackup -SqlInstance sql2014 -Destination sql2016 -CopyFile Copies the backup files for sql2014 databases to sql2016 default backup locations and then attempts restore from there. .EXAMPLE Test-DbaLastBackup -SqlInstance sql2014 -Destination sql2016 -CopyFile -CopyPath "\\BackupShare\TestRestore\" Copies the backup files for sql2014 databases to sql2016 default backup locations and then attempts restore from there. #> [CmdletBinding(SupportsShouldProcess = $true)] param ( [parameter(Mandatory = $true, ValueFromPipeline = $true)] [Alias("ServerInstance", "SqlServer", "Source")] [DbaInstanceParameter[]]$SqlInstance, [Alias("Credential")] [PSCredential] $SqlCredential, [Alias("Databases")] [object[]]$Database, [object[]]$ExcludeDatabase, [DbaInstanceParameter]$Destination, [object]$DestinationCredential, [string]$DataDirectory, [string]$LogDirectory, [string]$Prefix = "dbatools-testrestore-", [switch]$VerifyOnly, [switch]$NoCheck, [switch]$NoDrop, [switch]$CopyFile, [string]$CopyPath, [int]$MaxMB, [switch]$IncludeCopyOnly, [switch]$IgnoreLogBackup, [string]$AzureCredential, [switch]$Silent ) process { foreach ($instance in $sqlinstance) { if (-not $destination -or $nodestination) { $nodestination = $true $destination = $instance $DestinationCredential = $SqlCredential } try { Write-Message -Level Verbose -Message "Connecting to $instance" $sourceserver = Connect-SqlInstance -SqlInstance $instance -SqlCredential $sqlCredential } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } try { Write-Message -Level Verbose -Message "Connecting to $instance" $destserver = Connect-SqlInstance -SqlInstance $destination -SqlCredential $DestinationCredential } catch { Stop-Function -Message "Failed to connect to: $destination" -Target $destination -Continue } if ($destserver.VersionMajor -lt $sourceserver.VersionMajor) { Stop-Function -Message "$Destination is a lower version than $instance. Backups would be incompatible." -Continue } if ($destserver.VersionMajor -eq $sourceserver.VersionMajor -and $destserver.VersionMinor -lt $sourceserver.VersionMinor) { Stop-Function -Message "$Destination is a lower version than $instance. Backups would be incompatible." -Continue } if ($CopyPath) { $testpath = Test-DbaSqlPath -SqlInstance $destserver -Path $CopyPath if (!$testpath) { Stop-Function -Message "$destserver cannot access $CopyPath" -Continue } } else { # If not CopyPath is specified, use the destination server default backup directory $copyPath = $destserver.BackupDirectory } if ($instance -ne $destination -and !$CopyFile) { $sourcerealname = $sourceserver.ComputerNetBiosName $destrealname = $destserver.ComputerNetBiosName if ($BackupFolder) { if ($BackupFolder.StartsWith("\\") -eq $false -and $sourcerealname -ne $destrealname) { Stop-Function -Message "Backup folder must be a network share if the source and destination servers are not the same." -Continue } } } $source = $sourceserver.DomainInstanceName $destination = $destserver.DomainInstanceName if ($datadirectory) { if (!(Test-DbaSqlPath -SqlInstance $destserver -Path $datadirectory)) { $serviceaccount = $destserver.ServiceAccount Stop-Function -Message "Can't access $datadirectory Please check if $serviceaccount has permissions" -Continue } } else { $datadirectory = Get-SqlDefaultPaths -SqlInstance $destserver -FileType mdf } if ($logdirectory) { if (!(Test-DbaSqlPath -SqlInstance $destserver -Path $logdirectory)) { $serviceaccount = $destserver.ServiceAccount Stop-Function -Message "$Destination can't access its local directory $logdirectory. Please check if $serviceaccount has permissions" -Continue } } else { $logdirectory = Get-SqlDefaultPaths -SqlInstance $destserver -FileType ldf } if ((Test-Bound "AzureCredential") -and (Test-Bound "CopyFile")){ Stop-Function -Message "Cannot use copyfile with Azure backups, set to false" -continue $CopyFile = $false } if (!$Database) { $database = $sourceserver.databases.Name | Where-Object Name -ne 'tempdb' } if ($ExcludeDatabase) { $database = $database | Where-Object { $_ -notin $ExcludeDatabase } } if ($Database -or $ExcludeDatabase) { $dblist = $database Write-Message -Level Verbose -Message "Getting recent backup history for $instance" foreach ($dbname in $dblist) { if ($dbname -eq 'tempdb') { Write-Message -Level Verbose -Message "Skipping tempdb" continue } Write-Message -Level Verbose -Message "Processing $dbname" $copysuccess = $true $db = $sourceserver.databases[$dbname] # The db check is needed when the number of databases exceeds 255, then it's no longer auto-populated if (!$db) { Stop-Function -Message "$dbname does not exist on $source." -Continue } $lastbackup = Get-DbaBackupHistory -SqlInstance $sourceserver -Database $dbname -Last -IncludeCopyOnly:$IncludeCopyOnly #-raw if ($CopyFile) { try { Write-Message -Level Verbose -Message "Gathering information for file copy" $removearray = @() if (Test-Bound "IgnoreLogBackup"){ Write-Message -Level Verbose -Message "Skipping Log backups as requested" $lastbackup = @() $lastbackup += $full = Get-DbaBackupHistory -SqlInstance $sourceserver -Database $dbname -IncludeCopyOnly:$IncludeCopyOnly -LastFull #-raw $diff = Get-DbaBackupHistory -SqlInstance $sourceserver -Database $dbname -IncludeCopyOnly:$IncludeCopyOnly -LastDiff # -raw if ($full.start -le $diff.start){ $lastbackup += $diff } } else { $lastbackup = Get-DbaBackupHistory -SqlInstance $sourceserver -Database $dbname -Last -IncludeCopyOnly:$IncludeCopyOnly #-raw } foreach ($backup in $lastbackup) { foreach ($file in $backup) { $filename = Split-Path -Path $file.FullName -Leaf Write-Message -Level Verbose -Message "Processing $filename" $sourcefile = Join-AdminUnc -servername $sourceserver.ComputerNamePhysicalNetBIOS -filepath $file.Path if ($destserver.ComputerNamePhysicalNetBIOS -ne $env:COMPUTERNAME) { $remotedestdirectory = Join-AdminUnc -servername $destserver.ComputerNamePhysicalNetBIOS -filepath $copyPath } else { $remotedestdirectory = $copyPath } $remotedestfile = "$remotedestdirectory\$filename" $localdestfile = "$copyPath\$filename" Write-Message -Level Verbose -Message "Destination directory is $destdirectory" Write-Message -Level Verbose -Message "Destination filename is $remotedestfile" try { Write-Message -Level Verbose -Message "Copying $sourcefile to $remotedestfile" Copy-Item -Path $sourcefile -Destination $remotedestfile -ErrorAction Stop $backup.Path = $localdestfile $backup.FullName = $localdestfile $removearray += $remotedestfile } catch { $backup.Path = $sourcefile $backup.FullName = $sourcefile } } } $copysuccess = $true } catch { Write-Message -Level Warning -Message "Failed to copy backups for $dbname on $instance to $destdirectory - $_" $copysuccess = $false } } if ($null -eq $lastbackup) { Write-Message -Level Verbose -Message "No backups exist for this database" $lastbackup = @{ Path = "No backups exist for this database" } $fileexists = $false $restoreresult = "Skipped" $dbccresult = "Skipped" } if (!$copysuccess) { Write-Message -Level Verbose -Message "Failed to copy backups" $lastbackup = @{ Path = "Failed to copy backups" } $fileexists = $false $restoreresult = "Skipped" $dbccresult = "Skipped" } elseif (!($lastbackup | Where-Object { $_.type -eq 'Full' })) { Write-Message -Level Verbose -Message "No full backup returned from lastbackup" $lastbackup = @{ Path = "Not found" } $fileexists = $false $restoreresult = "Skipped" $dbccresult = "Skipped" } elseif ($source -ne $destination -and $lastbackup[0].Path.StartsWith('\\') -eq $false -and !$CopyFile) { Write-Message -Level Verbose -Message "Path not UNC and source does not match destination. Use -CopyFile to move the backup file." $fileexists = "Skipped" $restoreresult = "Restore not located on shared location" $dbccresult = "Skipped" } elseif (($lastbackup[0].Path | Foreach{Test-DbaSqlPath -SqlInstance $destserver -Path $_}) -eq $false) { Write-Message -Level Verbose -Message "SQL Server cannot find backup" $fileexists = $false $restoreresult = "Skipped" $dbccresult = "Skipped" } if ($restoreresult -ne "Skipped" -or $lastbackup[0].Path -like 'http*') { Write-Message -Level Verbose -Message "Looking good!" $fileexists = $true $ogdbname = $dbname $restorelist = Read-DbaBackupHeader -SqlInstance $destserver -Path $lastbackup[0].Path -AzureCredential $AzureCredential $mb = $restorelist.BackupSizeMB if ($MaxMB -gt 0 -and $MaxMB -lt $mb) { $success = "The backup size for $dbname ($mb MB) exceeds the specified maximum size ($MaxMB MB)" $dbccresult = "Skipped" } else { $dbccElapsed = $restoreElapsed = $startRestore = $endRestore = $startDbcc = $endDbcc = $null $dbname = "$prefix$dbname" $destdb = $destserver.databases[$dbname] if ($destdb) { Stop-Function -Message "$dbname already exists on $destination - skipping" -Continue } if ($Pscmdlet.ShouldProcess($destination, "Restoring $ogdbname as $dbname")) { Write-Message -Level Verbose -Message "Performing restore" $startRestore = Get-Date if ($verifyonly) { $restoreresult = $lastbackup | Restore-DbaDatabase -SqlInstance $destserver -RestoredDatababaseNamePrefix $prefix -DestinationFilePrefix $Prefix -DestinationDataDirectory $datadirectory -DestinationLogDirectory $logdirectory -VerifyOnly:$VerifyOnly -IgnoreLogBackup:$IgnoreLogBackup -AzureCredential $AzureCredential -TrustDbBackupHistory } else { $restoreresult = $lastbackup | Restore-DbaDatabase -SqlInstance $destserver -RestoredDatababaseNamePrefix $prefix -DestinationFilePrefix $Prefix -DestinationDataDirectory $datadirectory -DestinationLogDirectory $logdirectory -IgnoreLogBackup:$IgnoreLogBackup -AzureCredential $AzureCredential -TrustDbBackupHistory } $endRestore = Get-Date $restorets = New-TimeSpan -Start $startRestore -End $endRestore $ts = [timespan]::fromseconds($restorets.TotalSeconds) $restoreElapsed = "{0:HH:mm:ss}" -f ([datetime]$ts.Ticks) if ($restoreresult.RestoreComplete -eq $true) { $success = "Success" } else { $success = "Failure" } } $destserver = Connect-SqlInstance -SqlInstance $destination -SqlCredential $DestinationCredential if (!$NoCheck -and !$VerifyOnly) { # shouldprocess is taken care of in Start-DbccCheck if ($ogdbname -eq "master") { $dbccresult = "DBCC CHECKDB skipped for restored master ($dbname) database" } else { if ($success -eq "Success") { Write-Message -Level Verbose -Message "Starting DBCC" $startDbcc = Get-Date $dbccresult = Start-DbccCheck -Server $destserver -DbName $dbname 3>$null $endDbcc = Get-Date $dbccts = New-TimeSpan -Start $startDbcc -End $endDbcc $ts = [timespan]::fromseconds($dbccts.TotalSeconds) $dbccElapsed = "{0:HH:mm:ss}" -f ([datetime]$ts.Ticks) } else { $dbccresult = "Skipped" } } } if ($VerifyOnly) { $dbccresult = "Skipped" } if (!$NoDrop -and $null -ne $destserver.databases[$dbname]) { if ($Pscmdlet.ShouldProcess($dbname, "Dropping Database $dbname on $destination")) { Write-Message -Level Verbose -Message "Dropping database" ## Drop the database try { $removeresult = Remove-SqlDatabase -SqlInstance $destserver -DbName $dbname Write-Message -Level Verbose -Message "Dropped $dbname Database on $destination" } catch { $destserver.Databases.Refresh() if ($destserver.databases[$dbname]) { Write-Message -Level Warning -Message "Failed to Drop database $dbname on $destination" } } } } #Cleanup BackupFiles if -CopyFile and backup was moved to destination if ($CopyFile) { Write-Message -Level Verbose -Message "Removing copied backup file from $destination" try { $removearray | Remove-item -ErrorAction Stop } catch { Write-Message -Level Warning -Message $_ -ErrorRecord $_ -Target $instance } } $destserver.Databases.Refresh() if ($destserver.Databases[$dbname] -and !$NoDrop) { Write-Message -Level Warning -Message "$dbname was not dropped" } } } if ($Pscmdlet.ShouldProcess("console", "Showing results")) { [pscustomobject]@{ SourceServer = $source TestServer = $destination Database = $db.name FileExists = $fileexists Size = [dbasize](($lastbackup.TotalSize | Measure-Object -Sum).Sum) RestoreResult = $success DbccResult = $dbccresult RestoreStart = [dbadatetime]$startRestore RestoreEnd = [dbadatetime]$endRestore RestoreElapsed = $restoreElapsed DbccStart = [dbadatetime]$startDbcc DbccEnd = [dbadatetime]$endDbcc DbccElapsed = $dbccElapsed BackupDate = $lastbackup.Start BackupFiles = $lastbackup.FullName } } } } } } } |