DSCResources/MSFT_xSQLServerPowerPlan/MSFT_xSQLServerPowerPlan.psm1

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
$currentPath = Split-Path -Parent $MyInvocation.MyCommand.Path
Write-Verbose -Message "CurrentPath: $currentPath"

# Load Common Code
Import-Module $currentPath\..\..\xSQLServerHelper.psm1 -Verbose:$false -ErrorAction Stop

function Get-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Collections.Hashtable])]
    param
    (
        [parameter(Mandatory = $true)]
        [ValidateSet("Present","Absent")]
        [System.String]
        $Ensure
    )
        try
        {
            $CurrPerf = $(powercfg -getactivescheme)
            $CurrStart = $CurrPerf.IndexOf("(")+1
            $CurrEnd = $CurrPerf.Length-$CurrStart-1
            $CurrPerfName =$CurrPerf.Substring($CurrStart,$CurrEnd)
        }
        catch
        {
            Write-Warning -Message "Unable to get power plan"
        }

        if ($Ensure -and ($CurrPerfName -eq "High performance"))
        {
            $returnValue =@{
                Ensure = $true
            }
        }
        else
        {
            $returnValue =@{
                Ensure = $false
            }
        }
    $returnValue
}



function Set-TargetResource
{
    [CmdletBinding()]
    param
    (
        [parameter(Mandatory = $true)]
        [ValidateSet("Present","Absent")]
        [System.String]
        $Ensure
    )

    Switch($Ensure)
    {
        "Present"
        {$PlanName = "High performance"}
        "Absent"
        {$PlanName = "Balanced"}    
    }

    Try 
    {
        $ReqPerf = powercfg -l | %{if($_.contains($PlanName)) {$_.split()[3]}}
        $CurrPlan = $(powercfg -getactivescheme).split()[3]
        if ($CurrPlan -ne $ReqPerf) {powercfg -setactive $ReqPerf}
        New-VerboseMessage -Message "Powerplan has been set to $PlanName" 
    }
    
    Catch 
    {
        Write-Warning -Message "Unable to set power plan"
    }


}


function Test-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [parameter(Mandatory = $true)]
        [ValidateSet("Present","Absent")]
        [System.String]
        $Ensure
    )
    Switch($Ensure)
    {
        "Present"
        {$PlanName = "High performance"}
        "Absent"
        {$PlanName = "Balanced"}    
    }
    try
    {
        $ElementGuid = $(powercfg -getactivescheme).split()[3]
        $ReqPerfGuid = powercfg -l | %{if($_.contains($PlanName)) {$_.split()[3]}}
        $ReqPerf = powercfg -l | Where-Object {$_.contains($PlanName)}
        $ElementStart = $ReqPerf.IndexOf("(")+1
        $ElementEnd = $Reqperf.Length -$ElementStart -3
    
        $CurrPerf = $(powercfg -getactivescheme)
        $CurrStart = $CurrPerf.IndexOf("(")+1
        $CurrEnd = $CurrPerf.Length-$CurrStart-1
        $CurrPerfName =$CurrPerf.Substring($CurrStart,$CurrEnd)
    }
    catch
    {
        Write-Warning -Message "Unable to test power plan"
    }
    If($ElementGuid -eq $ReqPerfGuid)
    {
        New-VerboseMessage -Message "PowerPlan is set to $PlanName Already"
        return $true
    }
    else
    {
        New-VerboseMessage -Message "PowerPlan is $CurrPerfName Expect $PlanName"
        return $false
    }
}


Export-ModuleMember -Function *-TargetResource