DscResources/SwitchLcmMode/SwitchLcmMode.schema.psm1
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configuration SwitchLcmMode { param ( [Parameter(Mandatory)] [String] $SourceMetaMofDir, [Parameter()] [String] $TargetMetaMofDir, [Parameter()] [String] $ConfigurationName ) Import-DscResource -ModuleName PSDesiredStateConfiguration $TaskName = 'SwitchLcmMode' Script 'switchLcmMode' { TestScript = { $lcm = Get-DscLocalConfigurationManager if( $lcm.RefreshMode -eq 'Pull' ) { $scheduledTask = Get-ScheduledTask | Where-Object {$_.TaskName -like $using:TaskName} if( $null -ne $scheduledTask ) { Write-Host "Delete schedule task '$using:TaskName'." Unregister-ScheduledTask -TaskName $taskName -Confirm:$false -ErrorAction SilentlyContinue } return $true } Write-Verbose "Current LCM mode is '$($lcm.RefreshMode)', expected is 'Pull'" return $false } SetScript = { $cfgName = $using:ConfigurationName $targetDir = $using:TargetMetaMofDir if( [string]::IsNullOrWhiteSpace($cfgName) ) { $cfgName = $env:ComputerName } if( [string]::IsNullOrWhiteSpace($targetDir) ) { $targetDir = "$($env:TEMP)\DSC_Config" } $srcMetaMofPath = "$($using:SourceMetaMofDir)\$($cfgName).meta.mof" if( -not (Test-Path $srcMetaMofPath) ) { Write-Error "ERROR: New MetaMOF file '$srcMetaMofPath' not found." return } Write-Verbose "Creating target folder '$targetDir'..." New-Item -Path $targetDir -ItemType Directory -Force -ErrorAction SilentlyContinue Write-Verbose "Copy MetaMOF '$srcMetaMofPath' into target folder..." Copy-Item -Path $srcMetaMofPath -Destination $targetDir -Force -ErrorAction Stop $scheduledTask = Get-ScheduledTask | Where-Object {$_.TaskName -like $using:TaskName} if( $null -ne $scheduledTask ) { Write-Host "Delete existing schedule task '$using:TaskName'." Unregister-ScheduledTask -TaskName $using:TaskName -Confirm:$false -ErrorAction SilentlyContinue } Write-Verbose "Create scheduled task '$using:TaskName' to activate new DSC configuration..." $scriptCode = @" Start-Transcript -Path "`$PSScriptRoot\`$(`$MyInvocation.MyCommand.Name).log" -Append try { `$lcm = Get-DscLocalConfigurationManager -ErrorAction Stop `$metaMofPath = `'$targetDir\$cfgName.meta.mof`' if( -not (Test-Path `$metaMofPath) ) { throw "ERROR: Missing LCM configuration file `'`$metaMofPath`'." } if( `$null -ne `$lcm -and `$lcm.RefreshMode -eq 'Push' ) { Stop-DscConfiguration -Force -ErrorAction SilentlyContinue Remove-DscConfigurationDocument -Stage Pending -Force Remove-DscConfigurationDocument -Stage Current -Force Set-DscLocalConfigurationManager -Path `'$targetDir`' -ComputerName $cfgName -Force -Verbose Update-DscConfiguration -Wait -Verbose } } catch { Write-Error "Switch to LCM Pull mode failed with error.`n$_" } finally { Stop-Transcript } "@ $scriptFilePath = "$targetDir\$using:TaskName.ps1" $scriptCode | Set-Content -Path $scriptFilePath -Encoding UTF8 -Force # skip recreation of existing scheduled task if( $null -eq (Get-ScheduledTask $using:TaskName -ErrorAction SilentlyContinue) ) { $ta = New-ScheduledTaskAction -Execute 'powershell.exe' -Argument "-NoProfile -NonInteractive -ExecutionPolicy RemoteSigned -File $scriptFilePath" # Start at System Startup and repeat Task every 5 minutes for 12 hours $tt1 = New-ScheduledTaskTrigger -AtStartup -RandomDelay (New-TimeSpan -Minutes 6) $tt2 = New-ScheduledTaskTrigger -At (Get-Date).AddMinutes(10) -Once -RepetitionInterval (New-TimeSpan -Minutes 5) -RepetitionDuration (New-TimeSpan -Hours 12) Register-ScheduledTask $using:TaskName -Action $ta -Trigger @($tt1, $tt2) -User 'System' -Force -ErrorAction Stop # Restart system to allow a well defined switch from Push to Pull mode $global:DSCMachineStatus = 1 } } GetScript = { return @{result = 'N/A'}} } } |