internal/Test-DbaRestoreVersion.ps1
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function Test-DbaRestoreVersion { <# .SYNOPSIS Checks that the restore files are from a version of SQL Server that can be restored on the target version .DESCRIPTION Finds the anchoring Full backup (or multiple if it's a striped set). Then filters to ensure that all the backups are from that anchor point (LastLSN) and that they're all on the same RecoveryForkID Then checks that we have either enough Diffs and T-log backups to get to where we want to go. And checks that there is no break between LastLSN and FirstLSN in sequential files .PARAMETER FilterdRestoreFiles This is just an object consisting of the output from Read-DbaBackupHeader. Normally this will have been filtered down to a restorable chain before arriving here. (ie; only 1 anchoring Full backup) .PARAMETER SqlInstance Sql Server Instance against which the restore is going to be performed .PARAMETER SqlCredential Credential for connectin to SqlInstance .PARAMETER SystemDatabaseRestore Switch when restoring system databases .NOTES Original Author: Stuart Moore (@napalmgram), stuart-moore.com dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com) Copyright (C) 2016 Chrissy LeMaire This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. .EXAMPLE Test-DbaRestoreVersion -FilteredRestoreFiles $FilteredFiles -SqlInstance server1\instance1 Checks that the Restore chain in $FilteredFiles is compatiable with the SQL Server version of server1\instance1 #> [CmdletBinding()] Param ( [parameter(Mandatory = $true)] [Alias("ServerInstance", "SqlServer")] [object]$SqlInstance, [parameter(Mandatory = $true)] [object[]]$FilteredRestoreFiles, [PSCredential]$SqlCredential, [switch]$SystemDatabaseRestore ) $FunctionName =(Get-PSCallstack)[0].Command $RestoreVersion = ($FilteredRestoreFiles.SoftwareVersionMajor | Measure-Object -average).average Write-Verbose "$FunctionName - RestoreVersion is $RestoreVersion" #Test to make sure we don't have an upgrade mid backup chain, there's a reason I'm paranoid.. if ([int]$RestoreVersion -ne $RestoreVersion) { Write-Warning "$FunctionName - Version number change during backups - $RestoreVersion" return $false break } #Can't restore backwards try { if ($SqlInstance -isnot [Microsoft.SqlServer.Management.Smo.SqlSmoObject]) { $Newconnection = $true $Server = Connect-SqlInstance -SqlInstance $SqlInstance -SqlCredential $SqlCredential } else { $server = $SqlInstance } } catch { Write-Warning "$FunctionName - Cannot connect to $SqlInstance" break } if ($SystemDatabaseRestore) { if ($RestoreVersion -ne $Server.VersionMajor) { Write-Warning "$FunctionName - For System Database restore versions must match)" return $false break } } else { if ($RestoreVersion -gt $Server.VersionMajor) { Write-Warning "$FunctionName - Backups are from a newer version of SQL Server than $($Server.Name)" return $false break } if (($Server.VersionMajor -gt 10 -and $RestoreVersion -lt 9) ) { Write-Warning "$FunctionName - This version - $RestoreVersion - too old to restore on to $($Server.Name)" return $false break } } if ($Newconnection) { Write-Verbose "$FunctionName - Closing smo connection" $server.ConnectionContext.Disconnect() } return $True } |