functions/Get-DbaLastBackup.ps1
|
function Get-DbaLastBackup { <# .SYNOPSIS Get date/time for last known backups of databases. .DESCRIPTION Retrieves and compares the date/time for the last known backups, as well as the creation date/time for the database. Default output includes columns Server, Database, RecoveryModel, LastFullBackup, LastDiffBackup, LastLogBackup, SinceFull, SinceDiff, SinceLog, Status, DatabaseCreated, DaysSinceDbCreated. .PARAMETER SqlInstance The target SQL Server instance or instances. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance. .PARAMETER Database Specifies one or more database(s) to process. If unspecified, all databases will be processed. .PARAMETER ExcludeDatabase Specifies one or more database(s) to exclude from processing. .PARAMETER EnableException If this switch is enabled exceptions will be thrown to the caller, which will need to perform its own exception processing. Otherwise, the function will try to catch the exception, interpret it and provide a friendly error message. .NOTES Tags: DisasterRecovery, Backup Author: Klaas Vandenberghe (@PowerDBAKlaas) Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Get-DbaLastBackup .EXAMPLE PS C:\> Get-DbaLastBackup -SqlInstance ServerA\sql987 Returns a custom object displaying Server, Database, RecoveryModel, LastFullBackup, LastDiffBackup, LastLogBackup, SinceFull, SinceDiff, SinceLog, Status, DatabaseCreated, DaysSinceDbCreated .EXAMPLE PS C:\> Get-DbaLastBackup -SqlInstance ServerA\sql987 Returns a custom object with Server name, Database name, and the date the last time backups were performed. .EXAMPLE PS C:\> Get-DbaLastBackup -SqlInstance ServerA\sql987 | Select-Object * Returns a custom object with Server name, Database name, and the date the last time backups were performed, and also recoverymodel and calculations on how long ago backups were taken and what the status is. .EXAMPLE PS C:\> Get-DbaLastBackup -SqlInstance ServerA\sql987 | Select-Object * | Out-Gridview Returns a gridview displaying Server, Database, RecoveryModel, LastFullBackup, LastDiffBackup, LastLogBackup, SinceFull, SinceDiff, SinceLog, Status, DatabaseCreated, DaysSinceDbCreated. #> [CmdletBinding()] param ( [parameter(Mandatory, ValueFromPipeline)] [DbaInstanceParameter[]]$SqlInstance, [PSCredential] $SqlCredential, [object[]]$Database, [object[]]$ExcludeDatabase, [switch]$EnableException ) begin { function Get-DbaDateOrNull ($TimeSpan) { if ($TimeSpan -eq 0) { return $null } return $TimeSpan } $StartOfTime = [DbaTimeSpan](New-TimeSpan -Start ([datetime]0)) } process { foreach ($instance in $SqlInstance) { try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $sqlcredential -MinimumVersion 9 } catch { Stop-Function -Message "Error occurred while establishing connection to $instance" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } $dbs = $server.Databases | Where-Object { $_.name -ne 'tempdb' } if ($Database) { $dbs = $dbs | Where-Object Name -In $Database } if ($ExcludeDatabase) { $dbs = $dbs | Where-Object Name -NotIn $ExcludeDatabase } # Get-DbaDbBackupHistory -Last would make the job in one query but SMO's (and this) report the last backup of this type irregardless of the chain $FullHistory = Get-DbaDbBackupHistory -SqlInstance $server -Database $dbs.Name -LastFull -IncludeCopyOnly -Raw $DiffHistory = Get-DbaDbBackupHistory -SqlInstance $server -Database $dbs.Name -LastDiff -IncludeCopyOnly -Raw $IncrHistory = Get-DbaDbBackupHistory -SqlInstance $server -Database $dbs.Name -LastLog -IncludeCopyOnly -Raw foreach ($db in $dbs) { Write-Message -Level Verbose -Message "Processing $db on $instance" if ($db.IsAccessible -eq $false) { Write-Message -Level Warning -Message "The database $db on server $instance is not accessible. Skipping database." Continue } $LastFullBackup = ($FullHistory | Where-Object Database -eq $db.Name | Sort-Object -Property End -Descending | Select-Object -First 1).End if ($null -ne $LastFullBackup) { $SinceFull_ = [DbaTimeSpan](New-TimeSpan -Start $LastFullBackup) } else { $SinceFull_ = $StartOfTime } $LastDiffBackup = ($DiffHistory | Where-Object Database -eq $db.Name | Sort-Object -Property End -Descending | Select-Object -First 1).End if ($null -ne $LastDiffBackup) { $SinceDiff_ = [DbaTimeSpan](New-TimeSpan -Start $LastDiffBackup) } else { $SinceDiff_ = $StartOfTime } $LastIncrBackup = ($IncrHistory | Where-Object Database -eq $db.Name | Sort-Object -Property End -Descending | Select-Object -First 1).End if ($null -ne $LastIncrBackup) { $SinceLog_ = [DbaTimeSpan](New-TimeSpan -Start $LastIncrBackup) } else { $SinceLog_ = $StartOfTime } $daysSinceDbCreated = (New-TimeSpan -Start $db.createDate).Days if ($daysSinceDbCreated -lt 1 -and $SinceFull_ -eq 0) { $Status = 'New database, not backed up yet' } elseif ($SinceFull_.Days -gt 0 -and $SinceDiff_.Days -gt 0) { $Status = 'No Full or Diff Back Up in the last day' } elseif ($db.RecoveryModel -eq "Full" -and $SinceLog_.Hours -gt 0) { $Status = 'No Log Back Up in the last hour' } else { $Status = 'OK' } $result = [PSCustomObject]@{ ComputerName = $server.ComputerName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName Database = $db.Name RecoveryModel = $db.RecoveryModel LastFullBackup = [DbaDateTime]$LastFullBackup LastDiffBackup = [DbaDateTime]$LastDiffBackup LastLogBackup = [DbaDateTime]$LastIncrBackup SinceFull = Get-DbaDateOrNull -TimeSpan $SinceFull_ SinceDiff = Get-DbaDateOrNull -TimeSpan $SinceDiff_ SinceLog = Get-DbaDateOrNull -TimeSpan $SinceLog_ DatabaseCreated = $db.createDate DaysSinceDbCreated = $daysSinceDbCreated Status = $status } Select-DefaultView -InputObject $result -Property ComputerName, InstanceName, SqlInstance, Database, LastFullBackup, LastDiffBackup, LastLogBackup } } } } |