LabinaBox

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DSCResources/xFailOverCluster/1.5.0.0/DSCResources/MSFT_xClusterQuorum/MSFT_xClusterQuorum.psm1


function Get-TargetResource
{
    [CmdletBinding()]
    [OutputType([Hashtable])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateSet('Yes')]
        [String] $IsSingleInstance,

        [Parameter(Mandatory = $false)]
        [ValidateSet('NodeMajority', 'NodeAndDiskMajority', 'NodeAndFileShareMajority', 'DiskOnly')]
        [String] $Type,
        
        [Parameter(Mandatory = $false)]
        [String] $Resource
    )

    $ClusterQuorum = Get-ClusterQuorum

    switch ($ClusterQuorum.QuorumType)
    {
        # WS2016 only
        'Majority' {
            if ($ClusterQuorum.QuorumResource -eq $null)
            {
                $ClusterQuorumType = 'NodeMajority'
            }
            elseif ($ClusterQuorum.QuorumResource.ResourceType.DisplayName -eq 'Physical Disk')
            {
                $ClusterQuorumType = 'NodeAndDiskMajority'
            }
            elseif ($ClusterQuorum.QuorumResource.ResourceType.DisplayName -eq 'File Share Witness')
            {
                $ClusterQuorumType = 'NodeAndFileShareMajority'
            }
            else
            {
                throw "Unknown quorum resource: $($ClusterQuorum.QuorumResource)"
            }
        }

        # WS2012R2 only
        'NodeMajority' {
            $ClusterQuorumType = 'NodeMajority'
        }
        'NodeAndDiskMajority' {
            $ClusterQuorumType = 'NodeAndDiskMajority'
        }
        'NodeAndFileShareMajority' {
            $ClusterQuorumType = 'NodeAndFileShareMajority'
        }

        # All
        'DiskOnly' {
            $ClusterQuorumType = 'DiskOnly'
        }

        # Default
        default {
            throw "Unknown quorum type: $($ClusterQuorum.QuorumType)"
        }
    }

    if ($ClusterQuorumType -eq 'NodeAndFileShareMajority')
    {
        $ClusterQuorumResource = $ClusterQuorum.QuorumResource | Get-ClusterParameter -Name SharePath | Select-Object -ExpandProperty Value
    }
    else
    {
        $ClusterQuorumResource = [String] $ClusterQuorum.QuorumResource.Name
    }

    @{
        IsSingleInstance = $IsSingleInstance
        Type             = $ClusterQuorumType
        Resource         = $ClusterQuorumResource
    }
}

function Set-TargetResource
{
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateSet('Yes')]
        [String] $IsSingleInstance,

        [Parameter(Mandatory = $false)]
        [ValidateSet('NodeMajority', 'NodeAndDiskMajority', 'NodeAndFileShareMajority', 'DiskOnly')]
        [String] $Type,
        
        [Parameter(Mandatory = $false)]
        [String] $Resource
    )

    switch ($Type)
    {
        'NodeMajority' {
            Set-ClusterQuorum -NoWitness
        }

        'NodeAndDiskMajority' {
            Set-ClusterQuorum -DiskWitness $Resource
        }

        'NodeAndFileShareMajority' {
            Set-ClusterQuorum -FileShareWitness $Resource
        }

        'DiskOnly' {
            Set-ClusterQuorum -DiskOnly $Resource
        }
    }
}

function Test-TargetResource
{
    [CmdletBinding()]
    [OutputType([Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidateSet('Yes')]
        [String] $IsSingleInstance,

        [Parameter(Mandatory = $false)]
        [ValidateSet('NodeMajority', 'NodeAndDiskMajority', 'NodeAndFileShareMajority', 'DiskOnly')]
        [String] $Type,
        
        [Parameter(Mandatory = $false)]
        [String] $Resource
    )
    
    $CurrentQuorum = Get-TargetResource -IsSingleInstance $IsSingleInstance
    
    return (
        ($CurrentQuorum.Type -eq $Type) -and
        ($CurrentQuorum.Resource -eq $Resource)
    )
}

Export-ModuleMember -Function *-TargetResource