Lability

0.15.0

Src/Public/Reset-LabVM.ps1

                                function Reset-LabVM {

<#

    .SYNOPSIS

        Recreates a lab virtual machine.

    .DESCRIPTION

        The Reset-LabVM cmdlet deletes and recreates a lab virtual machine, reapplying the MOF.

        To revert a single VM to a previous state, use the Restore-VMSnapshot cmdlet. To revert an entire lab environment, use the Restore-Lab cmdlet.

#>

    [CmdletBinding(SupportsShouldProcess, DefaultParameterSetName = 'PSCredential')]

    param (

        ## Specifies the lab virtual machine/node name.

        [Parameter(Mandatory, ValueFromPipeline)]

        [ValidateNotNullOrEmpty()]

        [System.String[]] $Name,

        ## Specifies a PowerShell DSC configuration document (.psd1) containing the lab configuration.

        [Parameter(Mandatory, ValueFromPipelineByPropertyName)]

        [System.Collections.Hashtable]

        [Microsoft.PowerShell.DesiredStateConfiguration.ArgumentToConfigurationDataTransformationAttribute()]

        $ConfigurationData,

        ## Local administrator password of the virtual machine. The username is NOT used.

        [Parameter(ParameterSetName = 'PSCredential', ValueFromPipelineByPropertyName)]

        [ValidateNotNullOrEmpty()]

        [System.Management.Automation.PSCredential]

        [System.Management.Automation.CredentialAttribute()]

        $Credential = (& $credentialCheckScriptBlock),

        ## Local administrator password of the virtual machine.

        [Parameter(Mandatory, ParameterSetName = 'Password', ValueFromPipelineByPropertyName)]

        [ValidateNotNullOrEmpty()]

        [System.Security.SecureString] $Password,

        ## Directory path containing the virtual machines' .mof file(s).

        [Parameter(ValueFromPipelineByPropertyName)]

        [ValidateNotNullOrEmpty()]

        [System.String] $Path,

        ## Skip creation of the initial baseline snapshot.

        [Parameter(ValueFromPipelineByPropertyName)]

        [System.Management.Automation.SwitchParameter] $NoSnapshot,

        ## Ignores missing MOF file

        [Parameter(ValueFromPipelineByPropertyName)]

        [System.Management.Automation.SwitchParameter] $SkipMofCheck

    )

    begin {

        ## If we have only a secure string, create a PSCredential

        if ($PSCmdlet.ParameterSetName -eq 'Password') {

            $Credential = New-Object -TypeName 'System.Management.Automation.PSCredential' -ArgumentList 'LocalAdministrator', $Password;

        }

        if (-not $Credential) { throw ($localized.CannotProcessCommandError -f 'Credential'); }

        elseif ($Credential.Password.Length -eq 0) { throw ($localized.CannotBindArgumentError -f 'Password'); }

    }

    process {

        ## There is an assumption here is all .mofs are in the same folder

        $resolveConfigurationPathParams = @{

            ConfigurationData = $ConfigurationData;

            Name = $Name | Select-Object -First 1;

            Path = $Path;

            UseDefaultPath = $SkipMofCheck;

        }

        $Path = Resolve-ConfigurationPath @resolveConfigurationPathParams;

        $currentNodeCount = 0;

        foreach ($vmName in $Name) {

            $shouldProcessMessage = $localized.PerformingOperationOnTarget -f 'Reset-LabVM', $vmName;

            $verboseProcessMessage = Get-FormattedMessage -Message ($localized.ResettingVM -f $vmName);

            if ($PSCmdlet.ShouldProcess($verboseProcessMessage, $shouldProcessMessage, $localized.ShouldProcessWarning)) {

                $currentNodeCount++;

                [System.Int32] $percentComplete = (($currentNodeCount / $Name.Count) * 100) - 1;

                $activity = $localized.ConfiguringNode -f $vmName;

                Write-Progress -Id 42 -Activity $activity -PercentComplete $percentComplete;

                [ref] $null = Remove-LabVirtualMachine -Name $vmName -ConfigurationData $ConfigurationData;

                $newLabVirtualMachineParams = @{

                    Name = $vmName;

                    ConfigurationData = $ConfigurationData;

                    Path = $Path;

                    NoSnapshot = $NoSnapshot;

                    Credential = $Credential;

                }

                New-LabVirtualMachine @newLabVirtualMachineParams;

            } #end if should process

        } #end foreach VMd

        if (-not [System.String]::IsNullOrEmpty($activity)) {

            Write-Progress -Id 42 -Activity $activity -PercentComplete $percentComplete;

        }

    } #end process

} #end function Reset-LabVM

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