DSCResources/DSC_ExchAutoMountPoint/DSC_ExchAutoMountPoint.psm1
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Import-Module "$((Get-Item -LiteralPath "$($PSScriptRoot)").Parent.Parent.FullName)\Modules\ExchangeDscDiskPart\ExchangeDscDiskPart.psd1" -Force <# .SYNOPSIS Gets DSC resource configuration. .PARAMETER Identity The name of the server. Not actually used for anything. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER DiskToDBMap An array of strings containing the databases for each disk. Databases on the same disk should be in the same string, and comma separated. Example: 'DB1,DB2','DB3,DB4'. This puts DB1 and DB2 on one disk, and DB3 and DB4 on another. .PARAMETER SpareVolumeCount How many spare volumes will be available. .PARAMETER EnsureExchangeVolumeMountPointIsLast Whether the EXVOL mount point should be moved to be the last mount point listed on each disk. Defaults to $false. .PARAMETER CreateSubfolders If $true, specifies that DBNAME.db and DBNAME.log subfolders should be automatically created underneath the ExchangeDatabase mount points. Defaults to $false. .PARAMETER FileSystem The file system to use when formatting the volume. Defaults to NTFS. .PARAMETER MinDiskSize The minimum size of a disk to consider using. Defaults to none. Should be in a format like '1024MB' or '1TB'. .PARAMETER PartitioningScheme The partitioning scheme for the volume. Defaults to GPT. .PARAMETER UnitSize The unit size to use when formatting the disk. Defaults to 64k. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. #> function Get-TargetResource { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSDSCUseVerboseMessageInDSCResource", "")] [CmdletBinding()] [OutputType([System.Collections.Hashtable])] param ( [Parameter(Mandatory = $true)] [System.String] $Identity, [Parameter(Mandatory = $true)] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter(Mandatory = $true)] [System.String] $AutoDagVolumesRootFolderPath, [Parameter(Mandatory = $true)] [System.String[]] $DiskToDBMap, [Parameter(Mandatory = $true)] [System.UInt32] $SpareVolumeCount, [Parameter()] [System.Boolean] $EnsureExchangeVolumeMountPointIsLast = $false, [Parameter()] [System.Boolean] $CreateSubfolders = $false, [Parameter()] [ValidateSet('NTFS', 'REFS')] [System.String] $FileSystem = 'NTFS', [Parameter()] [System.String] $MinDiskSize = '', [Parameter()] [ValidateSet('MBR', 'GPT')] [System.String] $PartitioningScheme = 'GPT', [Parameter()] [System.String] $UnitSize = '64K', [Parameter()] [System.String] $VolumePrefix = 'EXVOL' ) Write-FunctionEntry -Verbose:$VerbosePreference $diskInfo = Get-DiskInfo $dbMap = Get-DiskToDBMap -AutoDagDatabasesRootFolderPath $AutoDagDatabasesRootFolderPath -DiskInfo $diskInfo $returnValue = @{ Identity = [System.String] $Identity DiskToDBMap = [System.String[]] $dbMap SpareVolumeCount = [System.UInt32] $SpareVolumeCount AutoDagDatabasesRootFolderPath = [System.String] $AutoDagDatabasesRootFolderPath AutoDagVolumesRootFolderPath = [System.String] $AutoDagVolumesRootFolderPath VolumePrefix = [System.String] $VolumePrefix MinDiskSize = [System.String] $MinDiskSize UnitSize = [System.String] $UnitSize PartitioningScheme = [System.String] $PartitioningScheme FileSystem = [System.String] $FileSystem } $returnValue } <# .SYNOPSIS Configures settings defined DSC resource configuration. .PARAMETER Identity The name of the server. Not actually used for anything. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER DiskToDBMap An array of strings containing the databases for each disk. Databases on the same disk should be in the same string, and comma separated. Example: 'DB1,DB2','DB3,DB4'. This puts DB1 and DB2 on one disk, and DB3 and DB4 on another. .PARAMETER SpareVolumeCount How many spare volumes will be available. .PARAMETER EnsureExchangeVolumeMountPointIsLast Whether the EXVOL mount point should be moved to be the last mount point listed on each disk. Defaults to $false. .PARAMETER CreateSubfolders If $true, specifies that DBNAME.db and DBNAME.log subfolders should be automatically created underneath the ExchangeDatabase mount points. Defaults to $false. .PARAMETER FileSystem The file system to use when formatting the volume. Defaults to NTFS. .PARAMETER MinDiskSize The minimum size of a disk to consider using. Defaults to none. Should be in a format like '1024MB' or '1TB'. .PARAMETER PartitioningScheme The partitioning scheme for the volume. Defaults to GPT. .PARAMETER UnitSize The unit size to use when formatting the disk. Defaults to 64k. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. #> function Set-TargetResource { [Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSDSCUseVerboseMessageInDSCResource", "")] [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [System.String] $Identity, [Parameter(Mandatory = $true)] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter(Mandatory = $true)] [System.String] $AutoDagVolumesRootFolderPath, [Parameter(Mandatory = $true)] [System.String[]] $DiskToDBMap, [Parameter(Mandatory = $true)] [System.UInt32] $SpareVolumeCount, [Parameter()] [System.Boolean] $EnsureExchangeVolumeMountPointIsLast = $false, [Parameter()] [System.Boolean] $CreateSubfolders = $false, [Parameter()] [ValidateSet('NTFS', 'REFS')] [System.String] $FileSystem = 'NTFS', [Parameter()] [System.String] $MinDiskSize = '', [Parameter()] [ValidateSet('MBR', 'GPT')] [System.String] $PartitioningScheme = 'GPT', [Parameter()] [System.String] $UnitSize = '64K', [Parameter()] [System.String] $VolumePrefix = 'EXVOL' ) Write-FunctionEntry -Verbose:$VerbosePreference # First see if we need to assign any disks to ExVol's $diskInfo = Get-DiskInfo $exVolCount = Get-InUseMountPointCount -RootFolder $AutoDagVolumesRootFolderPath -DiskInfo $diskInfo $requiredVolCount = $DiskToDBMap.Count + $SpareVolumeCount if ($exVolCount -lt $requiredVolCount) { New-ExVolumesWhereMissing @PSBoundParameters -CurrentVolCount $exVolCount -RequiredVolCount $requiredVolCount } # Now see if we need any DB mount points $diskInfo = Get-DiskInfo $exDbCount = Get-InUseMountPointCount -RootFolder $AutoDagDatabasesRootFolderPath -DiskInfo $diskInfo $requiredDbCount = Get-DesiredDatabaseCount -DiskToDBMap $DiskToDBMap if ($exDbCount -lt $requiredDbCount) { New-ExDatabaseMountPointsWhereMissing @PSBoundParameters } # Now see if any Mount Points are ordered incorrectly. Jetstress wants ExchangeDatabase mount points to be listed before ExchangeVolume mount points $diskInfo = Get-DiskInfo if ($EnsureExchangeVolumeMountPointIsLast -eq $true) { while ($true) { $volNum = Get-VolumeNumberWhereMountPointNotLastInList -AutoDagVolumesRootFolderPath $AutoDagVolumesRootFolderPath -DiskInfo $diskInfo if ($volNum -ne -1) { Move-VolumeMountPointToEndOfList -AutoDagVolumesRootFolderPath $AutoDagVolumesRootFolderPath -VolumeNumber $volNum -DiskInfo $diskInfo # Update DiskInfo for next iteration $diskInfo = Get-DiskInfo } else { break } } } } <# .SYNOPSIS Tests whether settings defined DSC resource configuration are in the expected state. .PARAMETER Identity The name of the server. Not actually used for anything. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER DiskToDBMap An array of strings containing the databases for each disk. Databases on the same disk should be in the same string, and comma separated. Example: 'DB1,DB2','DB3,DB4'. This puts DB1 and DB2 on one disk, and DB3 and DB4 on another. .PARAMETER SpareVolumeCount How many spare volumes will be available. .PARAMETER EnsureExchangeVolumeMountPointIsLast Whether the EXVOL mount point should be moved to be the last mount point listed on each disk. Defaults to $false. .PARAMETER CreateSubfolders If $true, specifies that DBNAME.db and DBNAME.log subfolders should be automatically created underneath the ExchangeDatabase mount points. Defaults to $false. .PARAMETER FileSystem The file system to use when formatting the volume. Defaults to NTFS. .PARAMETER MinDiskSize The minimum size of a disk to consider using. Defaults to none. Should be in a format like '1024MB' or '1TB'. .PARAMETER PartitioningScheme The partitioning scheme for the volume. Defaults to GPT. .PARAMETER UnitSize The unit size to use when formatting the disk. Defaults to 64k. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. #> function Test-TargetResource { [CmdletBinding()] [OutputType([System.Boolean])] param ( [Parameter(Mandatory = $true)] [System.String] $Identity, [Parameter(Mandatory = $true)] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter(Mandatory = $true)] [System.String] $AutoDagVolumesRootFolderPath, [Parameter(Mandatory = $true)] [System.String[]] $DiskToDBMap, [Parameter(Mandatory = $true)] [System.UInt32] $SpareVolumeCount, [Parameter()] [System.Boolean] $EnsureExchangeVolumeMountPointIsLast = $false, [Parameter()] [System.Boolean] $CreateSubfolders = $false, [Parameter()] [ValidateSet('NTFS', 'REFS')] [System.String] $FileSystem = 'NTFS', [Parameter()] [System.String] $MinDiskSize = '', [Parameter()] [ValidateSet('MBR', 'GPT')] [System.String] $PartitioningScheme = 'GPT', [Parameter()] [System.String] $UnitSize = '64K', [Parameter()] [System.String] $VolumePrefix = 'EXVOL' ) Write-FunctionEntry -Verbose:$VerbosePreference $diskInfo = Get-DiskInfo # Check if the number of assigned EXVOL's is less than the requested number of DB disks plus spares $mountPointCount = Get-InUseMountPointCount -RootFolder $AutoDagVolumesRootFolderPath -DiskInfo $diskInfo $testResults = $true if ($mountPointCount -lt ($DiskToDBMap.Count + $SpareVolumeCount)) { Write-InvalidSettingVerbose -SettingName 'MountPointCount' -ExpectedValue ($DiskToDBMap.Count + $SpareVolumeCount) -ActualValue $mountPointCount -Verbose:$VerbosePreference $testResults = $false } else # Loop through all requested DB's and see if they have a mount point yet { foreach ($value in $DiskToDBMap) { foreach ($db in $value.Split(',')) { if ((Test-DBHasMountPoint -AutoDagDatabasesRootFolderPath $AutoDagDatabasesRootFolderPath -Database $db -DiskInfo $diskInfo) -eq $false) { Write-InvalidSettingVerbose -SettingName "DB '$db' Has Mount Point" -ExpectedValue $true -ActualValue $false -Verbose:$VerbosePreference $testResults = $false } } } } # Now check if any ExchangeVolume mount points are higher ordered than ExchangeDatabase mount points. ExchangeDatabase MP's must be listed first for logical disk counters to function properly if ($EnsureExchangeVolumeMountPointIsLast -eq $true -and (Get-VolumeNumberWhereMountPointNotLastInList -AutoDagVolumesRootFolderPath $AutoDagVolumesRootFolderPath -DiskInfo $diskInfo) -ne -1) { Write-Verbose -Message "One or more volumes have an $($AutoDagVolumesRootFolderPath) mount point ordered before a $($AutoDagDatabasesRootFolderPath) mount point" $testResults = $false } return $testResults } <# .SYNOPSIS Creates Exchange Volume mount points for any disks which should have them, but do not. .PARAMETER Identity The name of the server. Not actually used for anything. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER DiskToDBMap An array of strings containing the databases for each disk. Databases on the same disk should be in the same string, and comma separated. Example: 'DB1,DB2','DB3,DB4'. This puts DB1 and DB2 on one disk, and DB3 and DB4 on another. .PARAMETER SpareVolumeCount How many spare volumes will be available. .PARAMETER EnsureExchangeVolumeMountPointIsLast Whether the EXVOL mount point should be moved to be the last mount point listed on each disk. Defaults to $false. .PARAMETER CreateSubfolders If $true, specifies that DBNAME.db and DBNAME.log subfolders should be automatically created underneath the ExchangeDatabase mount points. Defaults to $false. .PARAMETER FileSystem The file system to use when formatting the volume. Defaults to NTFS. .PARAMETER MinDiskSize The minimum size of a disk to consider using. Defaults to none. Should be in a format like '1024MB' or '1TB'. .PARAMETER PartitioningScheme The partitioning scheme for the volume. Defaults to GPT. .PARAMETER UnitSize The unit size to use when formatting the disk. Defaults to 64k. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. .PARAMETER CurrentVolCount The current number of Exchange Volumes that have been created. .PARAMETER RequiredVolCount The expected final number of Exchange Volumes. #> function New-ExVolumesWhereMissing { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [System.String] $Identity, [Parameter(Mandatory = $true)] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter(Mandatory = $true)] [System.String] $AutoDagVolumesRootFolderPath, [Parameter(Mandatory = $true)] [System.String[]] $DiskToDBMap, [Parameter(Mandatory = $true)] [System.UInt32] $SpareVolumeCount, [Parameter()] [System.Boolean] $EnsureExchangeVolumeMountPointIsLast = $false, [Parameter()] [System.Boolean] $CreateSubfolders = $false, [Parameter()] [ValidateSet('NTFS', 'REFS')] [System.String] $FileSystem = 'NTFS', [Parameter()] [System.String] $MinDiskSize = '', [Parameter()] [ValidateSet('MBR', 'GPT')] [System.String] $PartitioningScheme = 'GPT', [Parameter()] [System.String] $UnitSize = '64K', [Parameter()] [System.String] $VolumePrefix = 'EXVOL', [Parameter(Mandatory = $true)] [System.Int32] $CurrentVolCount, [Parameter(Mandatory = $true)] [System.Int32] $RequiredVolCount ) for ($i = $CurrentVolCount; $i -lt $RequiredVolCount; $i++) { if ($i -ne $CurrentVolCount) # Need to update disk info if we've gone through the loop already { $diskInfo = Get-DiskInfo } $firstDisk = Get-FirstAvailableDiskNumber -MinDiskSize $MinDiskSize -DiskInfo $diskInfo if ($firstDisk -ne -1) { $firstVolume = Get-FirstAvailableVolumeNumber -AutoDagVolumesRootFolderPath $AutoDagVolumesRootFolderPath -VolumePrefix $VolumePrefix if ($firstVolume -ne -1) { $volPath = Join-Path -Path "$($AutoDagVolumesRootFolderPath)" -ChildPath "$($VolumePrefix)$($firstVolume)" Initialize-ExchangeVolume -DiskNumber $firstDisk -Folder $volPath -FileSystem $FileSystem -UnitSize $UnitSize -PartitioningScheme $PartitioningScheme -Label "$($VolumePrefix)$($firstVolume)" } else { throw 'Unable to find a free volume number to use when naming the volume folder' } } else { throw 'No available disks to assign an Exchange Volume mount point to' } } } <# .SYNOPSIS Looks for databases that have never had a mount point created, and adds a mount point for them on an appropriate Exchange Volume. .PARAMETER Identity The name of the server. Not actually used for anything. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER DiskToDBMap An array of strings containing the databases for each disk. Databases on the same disk should be in the same string, and comma separated. Example: 'DB1,DB2','DB3,DB4'. This puts DB1 and DB2 on one disk, and DB3 and DB4 on another. .PARAMETER SpareVolumeCount How many spare volumes will be available. .PARAMETER EnsureExchangeVolumeMountPointIsLast Whether the EXVOL mount point should be moved to be the last mount point listed on each disk. Defaults to $false. .PARAMETER CreateSubfolders If $true, specifies that DBNAME.db and DBNAME.log subfolders should be automatically created underneath the ExchangeDatabase mount points. Defaults to $false. .PARAMETER FileSystem The file system to use when formatting the volume. Defaults to NTFS. .PARAMETER MinDiskSize The minimum size of a disk to consider using. Defaults to none. Should be in a format like '1024MB' or '1TB'. .PARAMETER PartitioningScheme The partitioning scheme for the volume. Defaults to GPT. .PARAMETER UnitSize The unit size to use when formatting the disk. Defaults to 64k. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. #> function New-ExDatabaseMountPointsWhereMissing { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [System.String] $Identity, [Parameter(Mandatory = $true)] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter(Mandatory = $true)] [System.String] $AutoDagVolumesRootFolderPath, [Parameter(Mandatory = $true)] [System.String[]] $DiskToDBMap, [Parameter(Mandatory = $true)] [System.UInt32] $SpareVolumeCount, [Parameter()] [System.Boolean] $EnsureExchangeVolumeMountPointIsLast = $false, [Parameter()] [System.Boolean] $CreateSubfolders = $false, [Parameter()] [ValidateSet('NTFS', 'REFS')] [System.String] $FileSystem = 'NTFS', [Parameter()] [System.String] $MinDiskSize = '', [Parameter()] [ValidateSet('MBR', 'GPT')] [System.String] $PartitioningScheme = 'GPT', [Parameter()] [System.String] $UnitSize = '64K', [Parameter()] [System.String] $VolumePrefix = 'EXVOL' ) for ($i = 0; $i -lt $DiskToDBMap.Count; $i++) { if ($i -gt 0) # Need to refresh current disk info { $diskInfo = Get-DiskInfo } $dbsNeedingMountPoints = @() $allDBsRequestedForDisk = $DiskToDBMap[$i].Split(',') for ($j = 0; $j -lt $allDBsRequestedForDisk.Count; $j++) { $current = $allDBsRequestedForDisk[$j] $path = Join-Path -Path "$($AutoDagDatabasesRootFolderPath)" -ChildPath "$($current)" # We only want to touch datases who have never had a mount point created. After that, AutoReseed will handle it. if ((Test-Path -Path "$($path)") -eq $false) { $dbsNeedingMountPoints += $current } else # Since the folder already exists, need to check and error if the mount point doesn't { if ((Get-MountPointVolumeNumber -Path $path) -eq -1) { throw "Database '$($current)' already has a folder on disk at '$($path)', but does not have a mount point. This must be manually corrected for xAutoMountPoint to proceed." } } } if ($dbsNeedingMountPoints.Count -eq $allDBsRequestedForDisk.Count) # No DB mount points for this disk have been created yet { $targetVolume = Get-ExchangeVolumeNumberForMountPoint -AutoDagDatabasesRootFolderPath $AutoDagDatabasesRootFolderPath -AutoDagVolumesRootFolderPath $AutoDagVolumesRootFolderPath -DBsPerDisk $allDBsRequestedForDisk.Count -VolumePrefix $VolumePrefix -DiskInfo $diskInfo } elseif ($dbsNeedingMountPoints.Count -gt 0) # We just need to create some mount points { $existingDB = '' # Find a DB that's already had its mount point created foreach ($db in $allDBsRequestedForDisk) { if (($dbsNeedingMountPoints.Contains($db) -eq $false)) { $existingDB = $db break } } if ($existingDB -ne '') { $targetVolume = Get-ExchangeVolumeNumberForMountPoint -AutoDagDatabasesRootFolderPath $AutoDagDatabasesRootFolderPath -AutoDagVolumesRootFolderPath $AutoDagVolumesRootFolderPath -ExistingDB $existingDB -DBsPerDisk $allDBsRequestedForDisk.Count -DBsToCreate $dbsNeedingMountPoints.Count -VolumePrefix $VolumePrefix -DiskInfo $diskInfo } } else # All DB's requested for this disk are good. Just continue on in the loop { continue } if ($null -ne $targetVolume) { if ($targetVolume -ne -1) { foreach ($db in $dbsNeedingMountPoints) { $path = Join-Path -Path "$($AutoDagDatabasesRootFolderPath)" -ChildPath "$($db)" Add-ExchangeMountPoint -VolumeNumber $targetVolume -Folder $path if ($CreateSubfolders -eq $true) { $dbFolder = Join-Path -Path "$($path)" -ChildPath "$($db).db" $logFolder = Join-Path -Path "$($path)" -ChildPath "$($db).log" if ((Test-Path -LiteralPath "$($dbFolder)") -eq $false) { New-Item -ItemType Directory -Path "$($dbFolder)" } if ((Test-Path -LiteralPath "$($logFolder)") -eq $false) { New-Item -ItemType Directory -Path "$($logFolder)" } } } } else { throw "Unable to find a volume to place mount points for the following databases: '$($dbsNeedingMountPoints)'" } } } } <# .SYNOPSIS Builds a map of the DBs that already exist on disk. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Get-DiskToDBMap { [CmdletBinding()] [OutputType([System.String[]])] param ( [Parameter()] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) # Get the DB path to a point where we know there will be a trailing \ $dbpath = Join-Path -Path "$($AutoDagDatabasesRootFolderPath)" -ChildPath "" # Will be the return value for DiskToDBMap [System.String[]] $dbMap = @() # Loop through all existing mount points and figure out which ones are for DB's foreach ($key in $DiskInfo.VolumeToMountPointMap.Keys) { [System.String] $mountPoints = '' foreach ($mountPoint in $DiskInfo.VolumeToMountPointMap[$key]) { if ($mountPoint.StartsWith($dbpath)) { $startIndex = $dbpath.Length $endIndex = $mountPoint.IndexOf('\', $startIndex) $dbName = $mountPoint.Substring($startIndex, $endIndex - $startIndex) if ($mountPoints -eq '') { $mountPoints = $dbName } else { $mountPoints += ",$($dbName)" } } } if ($mountPoints.Length -gt 0) { $dbMap += $mountPoints } } return $dbMap } <# .SYNOPSIS Looks for a volume where an Exchange Volume or Database mount point can be added. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER ExistingDB If ExistingDB is not specified, looks for a spare volume that has no mount points yet. If ExistingDB is specified, finds the volume number where that DB exists, only if there is room to Create the requested database mount points. .PARAMETER DBsPerDisk The number of databases that are allowed per disk. .PARAMETER DBsToCreate The number of databases to create on the discovered disk. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Get-ExchangeVolumeNumberForMountPoint { [CmdletBinding()] [OutputType([System.Int32])] param ( [Parameter()] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter()] [System.String] $AutoDagVolumesRootFolderPath, [Parameter()] [System.String] $ExistingDB = '', [Parameter()] [Uint32] $DBsPerDisk, [Parameter()] [Uint32] $DBsToCreate, [Parameter()] [System.String] $VolumePrefix = 'EXVOL', [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) $targetVol = -1 # Our return variable [object[]] $keysSorted = Get-ExchangeVolumeKeysSorted -AutoDagDatabasesRootFolderPath $AutoDagDatabasesRootFolderPath -AutoDagVolumesRootFolderPath $AutoDagVolumesRootFolderPath -VolumePrefix $VolumePrefix -DiskInfo $DiskInfo # Loop through every volume foreach ($key in $keysSorted) { [int] $intKey = $key # Get mount points for this volume [System.String[]] $mountPoints = $DiskInfo.VolumeToMountPointMap[$intKey] $hasExVol = $false # Whether any ExVol mount points exist on this disk $hasExDb = $false # Whether any ExDB mount points exist on this disk $hasExistingDB = $false # Whether $ExistingDB exists as a mount point on this disk # Inspect each individual mount point foreach ($mountPoint in $mountPoints) { if ($mountPoint.StartsWith($AutoDagVolumesRootFolderPath)) { $hasExVol = $true } elseif ($mountPoint.StartsWith($AutoDagDatabasesRootFolderPath)) { $hasExDb = $true $path = Join-Path -Path "$($AutoDagDatabasesRootFolderPath)" -ChildPath "$($ExistingDB)" if ($mountPoint.StartsWith($path)) { $hasExistingDB = $true } } } if ($ExistingDB -eq '') { if ($hasExVol -eq $true -and $hasExDb -eq $false) { $targetVol = $intKey break } } else { if ($hasExVol -eq $true -and $hasExistingDB -eq $true) { if (($mountPoints.Count + $DBsToCreate) -le ($DBsPerDisk + 1)) { $targetVol = $intKey } break } } } return $targetVol } <# .SYNOPSIS Finds the names of all existing EXVOL mount points, and returns a sorted array of all the EXVOL volume numbers. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Get-ExchangeVolumeKeysSorted { [CmdletBinding()] [OutputType([System.String[]])] param ( [Parameter()] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter()] [System.String] $AutoDagVolumesRootFolderPath, [Parameter()] [System.String] $VolumePrefix = 'EXVOL', [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) [System.String[]] $sortedKeys = @() # The return value [System.String] $pathBeforeVolumeNumber = Join-Path -Path $AutoDagVolumesRootFolderPath -ChildPath $VolumePrefix # First extract the actual volume number as an Int from the volume path, then add it to a new hashtable with the same key value [System.Collections.Hashtable] $tempVolumeToMountPointMap = @{} foreach ($key in $DiskInfo.VolumeToMountPointMap.Keys) { $volPath = '' # Loop through each mount point on this volume and find the EXVOL mount point foreach ($value in $DiskInfo.VolumeToMountPointMap[$key]) { if ($value.StartsWith($pathBeforeVolumeNumber)) { $volPath = $value break } } if ($volPath.StartsWith($pathBeforeVolumeNumber)) { if ($volPath.EndsWith('\') -or $volPath.EndsWith('/')) { [System.String] $exVolNumberStr = $volPath.Substring($pathBeforeVolumeNumber.Length, ($volPath.Length - $pathBeforeVolumeNumber.Length - 1)) } else { [System.String] $exVolNumberStr = $volPath.Substring($pathBeforeVolumeNumber.Length, ($volPath.Length - $pathBeforeVolumeNumber.Length)) } [int] $exVolNumber = [int]::Parse($exVolNumberStr) $tempVolumeToMountPointMap.Add($key, $exVolNumber) } } # Now go through the volume numbers, and add the keys to the return array in sorted value order while ($tempVolumeToMountPointMap.Count -gt 0) { [object[]] $keys = $tempVolumeToMountPointMap.Keys [int] $lowestKey = $keys[0] [int] $lowestValue = $tempVolumeToMountPointMap[$keys[0]] for ($i = 1; $i -lt $tempVolumeToMountPointMap.Count; $i++) { [int] $currentValue = $tempVolumeToMountPointMap[$keys[$i]] if ($currentValue -lt $lowestValue) { $lowestKey = $keys[$i] $lowestValue = $currentValue } } $sortedKeys += $lowestKey $tempVolumeToMountPointMap.Remove($lowestKey) } return $sortedKeys } <# .SYNOPSIS Finds the lowest disk number that doesn't have any volumes associated, and is larger than the requested size. .PARAMETER MinDiskSize The minimum disk size to consider when looking for available disks. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Get-FirstAvailableDiskNumber { [CmdletBinding()] [OutputType([System.UInt32])] param ( [Parameter()] [System.String] $MinDiskSize = '', [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) $diskNum = -1 foreach ($key in $DiskInfo.DiskToVolumeMap.Keys) { if ($DiskInfo.DiskToVolumeMap[$key].Count -eq 0 -and ($key -lt $diskNum -or $diskNum -eq -1)) { if ($MinDiskSize -ne '') { [Uint64] $minSize = 0 + $MinDiskSize.Replace(' ', '') [Uint64] $actualSize = 0 + $DiskInfo.DiskSizeMap[$key].Replace(' ', '') if ($actualSize -gt $minSize) { $diskNum = $key } } else { $diskNum = $key } } } return $diskNum } <# .SYNOPSIS Looks in the volumes root folder and finds the first number we can give to a volume folder based off of what folders have already been created. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER VolumePrefix The prefix to give to Exchange Volume folders. Defaults to EXVOL. #> function Get-FirstAvailableVolumeNumber { [CmdletBinding()] [OutputType([System.Int32])] param ( [Parameter()] [System.String] $AutoDagVolumesRootFolderPath, [Parameter()] [System.String] $VolumePrefix ) if ((Test-Path -LiteralPath "$($AutoDagVolumesRootFolderPath)") -eq $false) # If the ExVol folder doesn't already exist, then we can start with 1 { return 1 } $currentFolders = Get-ChildItem -LiteralPath "$($AutoDagVolumesRootFolderPath)" | Where-Object { $_.GetType().Name -eq 'DirectoryInfo' } | Sort-Object for ($i = 1; $i -lt 999; $i++) { $existing = $null $existing = $currentFolders | Where-Object { $_.Name -eq "$($VolumePrefix)$($i)" } if ($null -eq $existing) { return $i } } return -1 } <# .SYNOPSIS Counts and returns the number of DB's in the input DiskToDBMap. .PARAMETER DiskToDBMap An array of strings containing the databases for each disk. Databases on the same disk should be in the same string, and comma separated. Example: 'DB1,DB2','DB3,DB4'. This puts DB1 and DB2 on one disk, and DB3 and DB4 on another. #> function Get-DesiredDatabaseCount { [CmdletBinding()] [OutputType([System.Int32])] param ( [Parameter()] [System.String[]] $DiskToDBMap ) $count = 0 foreach ($value in $DiskToDBMap) { $count += $value.Split(',').Count } return $count } <# .SYNOPSIS Checks if a database already has a mountpoint created. .PARAMETER AutoDagDatabasesRootFolderPath The parent folder for Exchange database mount point folders. .PARAMETER Database The name of the Database to check for. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Test-DBHasMountPoint { [CmdletBinding()] [OutputType([System.Boolean])] param ( [Parameter()] [System.String] $AutoDagDatabasesRootFolderPath, [Parameter()] [System.String] $Database, [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) $dbPath = Join-Path -Path "$($AutoDagDatabasesRootFolderPath)" -ChildPath "$($Database)" foreach ($key in $DiskInfo.VolumeToMountPointMap.Keys) { foreach ($mountPoint in $DiskInfo.VolumeToMountPointMap[$key]) { if ($mountPoint.StartsWith($dbPath)) { return $true } } } return $false } <# .SYNOPSIS Gets the count of in use mount points matching the given critera. .PARAMETER RootFolder The folder to count Mount Points within. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Get-InUseMountPointCount { [CmdletBinding()] [OutputType([System.Int32])] param ( [Parameter()] [System.String] $RootFolder, [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) $count = 0 foreach ($key in $DiskInfo.VolumeToMountPointMap.Keys) { foreach ($mountPoint in $DiskInfo.VolumeToMountPointMap[$key]) { if ($mountPoint.StartsWith($RootFolder)) { $count++ } } } return $count } <# .SYNOPSIS Checks all volumes, and sees if any of them have ExchangeVolume mount points that show up before other (like ExchangeDatabase) mount points. If so, it returns the volume number. If not, it returns -1. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Get-VolumeNumberWhereMountPointNotLastInList { [CmdletBinding()] [OutputType([System.Int32])] param ( [Parameter()] [System.String] $AutoDagVolumesRootFolderPath, [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) foreach ($key in $DiskInfo.VolumeToMountPointMap.Keys) { $values = $DiskInfo.VolumeToMountPointMap[$key] if ($null -ne $values) { for ($i = 0; $i -lt $values.Count; $i++) { if ($values[$i].StartsWith($AutoDagVolumesRootFolderPath) -eq $true -and $i -lt ($values.Count - 1)) { return $key } } } } return -1 } <# .SYNOPSIS For volumes that have multiple mount points including an ExchangeVolum mount point, sends removes and re-adds the ExchangeVolume mount point so that it is at the end of the list of mount points. .PARAMETER AutoDagVolumesRootFolderPath The parent folder for Exchange volume mount point folders. .PARAMETER VolumeNumber The number of the volume to modify. .PARAMETER DiskInfo Information on the disks and volumes that already exist on the system. #> function Move-VolumeMountPointToEndOfList { [CmdletBinding()] param ( [Parameter()] [System.String] $AutoDagVolumesRootFolderPath, [Parameter()] [System.Int32] $VolumeNumber, [Parameter(Mandatory = $true)] [System.Collections.Hashtable] $DiskInfo ) $values = $DiskInfo.VolumeToMountPointMap[$VolumeNumber] foreach ($folderName in $values) { if ($folderName.StartsWith($AutoDagVolumesRootFolderPath)) { if ($folderName.EndsWith('\')) { $folderName = $folderName.Substring(0, $folderName.Length - 1) } Start-DiskPart -Commands "select volume $($VolumeNumber)", "remove mount=`"$($folderName)`"", "assign mount=`"$($folderName)`"" -Verbose:$VerbosePreference | Out-Null break } } } <# .SYNOPSIS Takes an empty disk, initalizes and formats it, and gives it an ExchangeVolume mount point. .PARAMETER Folder The folder to assign the Exchange Volume mount point to. .PARAMETER FileSystem The file system to use when formatting the volume. Defaults to NTFS. .PARAMETER Label The label to assign to the formatted volume. .PARAMETER PartitioningScheme The partitioning scheme for the volume. Defaults to GPT. .PARAMETER UnitSize The unit size to use when formatting the disk. Defaults to 64k. #> function Initialize-ExchangeVolume { [CmdletBinding()] param ( [Parameter()] [int] $DiskNumber, [Parameter()] [System.String] $Folder, [Parameter()] [ValidateSet('NTFS', 'REFS')] [System.String] $FileSystem = 'NTFS', [Parameter()] [System.String] $Label, [Parameter()] [System.String] $PartitioningScheme, [Parameter()] [System.String] $UnitSize ) # Initialize the disk and put in MBR format Start-DiskPart -Commands "select disk $($DiskNumber)", 'clean' -Verbose:$VerbosePreference | Out-Null Start-DiskPart -Commands "select disk $($DiskNumber)", 'online disk' -Verbose:$VerbosePreference | Out-Null Start-DiskPart -Commands "select disk $($DiskNumber)", 'attributes disk clear readonly', 'convert MBR' -Verbose:$VerbosePreference | Out-Null Start-DiskPart -Commands "select disk $($DiskNumber)", 'offline disk' -Verbose:$VerbosePreference | Out-Null # Online the disk Start-DiskPart -Commands "select disk $($DiskNumber)", 'attributes disk clear readonly', 'online disk' -Verbose:$VerbosePreference | Out-Null # Convert to GPT if requested if ($PartitioningScheme -eq 'GPT') { Start-DiskPart -Commands "select disk $($DiskNumber)", 'convert GPT noerr' -Verbose:$VerbosePreference | Out-Null } # Create the directory if it doesn't exist if ((Test-Path $Folder) -eq $False) { New-Item -ItemType Directory -Path "$($Folder)" | Out-Null } # Create the partition and format the drive if ($FileSystem -eq 'NTFS') { $formatString = "Format FS=$($FileSystem) UNIT=$($UnitSize) Label=$($Label) QUICK" Start-DiskPart -Commands "select disk $($DiskNumber)", "create partition primary", "$($formatString)", "assign mount=`"$($Folder)`"" -Verbose:$VerbosePreference | Out-Null } else # If ($FileSystem -eq "REFS") { Start-DiskPart -Commands "select disk $($DiskNumber)", "create partition primary" -Verbose:$VerbosePreference | Out-Null if ($UnitSize.ToLower().EndsWith('k')) { $UnitSizeBytes = [UInt64]::Parse($UnitSize.Substring(0, $UnitSize.Length - 1)) * 1024 } else { $UnitSizeBytes = $UnitSize } Write-Verbose -Message 'Sleeping for 15 seconds after partition creation.' Start-Sleep -Seconds 15 Get-Partition -DiskNumber $DiskNumber -PartitionNumber 2 | Format-Volume -AllocationUnitSize $UnitSizeBytes -FileSystem REFS -NewFileSystemLabel $Label -SetIntegrityStreams:$false -Confirm:$false Add-PartitionAccessPath -DiskNumber $DiskNumber -PartitionNumber 2 -AccessPath $Folder -PassThru | Set-Partition -NoDefaultDriveLetter $true } } <# .SYNOPSIS Adds a mount point to an existing volume. .PARAMETER VolumeNumber The number of the volume to assign a mount point to. .PARAMETER Folder The folder to assign the Exchange Volume mount point to. #> function Add-ExchangeMountPoint { [CmdletBinding()] param ( [Parameter()] [int] $VolumeNumber, [Parameter()] [System.String] $Folder ) # Create the directory if it doesn't exist if ((Test-Path $Folder) -eq $False) { New-Item -ItemType Directory -Path "$($Folder)" | Out-Null } Start-DiskPart -Commands "select volume $($VolumeNumber)", "assign mount=`"$($Folder)`"" -Verbose:$VerbosePreference | Out-Null } Export-ModuleMember -Function *-TargetResource |