#===========================================================
# # Microsoft PowerShell Source File 
# 
# NAME:    CheckISCOnNodesOfHyperVCluster.ps1
# VERSION:    1.0.0.0

# AUTHOR:    Didier Van Hoye
# DATE :    17/11/2012
# 
# COMMENT:     This script is intended to be run 
#              against Windows Server 2012 and assumes
#            the use of PowerShell 3.0
#            The parameters are optional but if you
#            leave out some the remainder should be named.
# # =======================================================
 
cls
$ErrorActionPreference = "Stop"

 
function CheckHyperVClusterHostsICVersion
{
    Param
    (
        #Param help description
        [Version]
        $ExpectedISCVersion,
        #Param help description
        [String]
        $Cluster
    )

    Write-Host "This script will check the IS components on all nodes of a cluster." -ForegroundColor Green
 
    If ($ExpectedISCVersion) {Write-Host "You specified the expected IS component version to be $ExpectedISCVersion" -ForegroundColor Green}
    Else {Write-host "You did not specify an expected IS component version." -ForegroundColor Green}
    
    If ($Cluster)
    {
        Try
        {
            $ClusterObject= Get-Cluster -Name $Cluster
        }
        Catch
        {     
            Write-Host "We cannot contact the cluster you specified"
        }
    }
    Else
    {    
        write-Host "`n`n"
        Write-host "You did not specify a cluster to connect to. We'll use the cluster to which the node this script is running on belongs if any." -ForegroundColor Yellow
        write-Host "`n`n"
  
        Try
        {
            $ClusterObject = Get-Cluster
        }
  
        Catch
        {
            $LocalHost = $env:computername
            Write-Host
            Write-Host "The current node ($LocalHost) is not a member of a cluster. As a courtsey to you we'll check the IS components for current host" -foregroundcolor Magenta
            Write-Host
        }
 
    }
  
    If ($ClusterObject) {$ToCheck= "the nodes of cluster $ClusterObject"} Else { $ToCheck = "server $env:computername"}
 
    write-Host "Attempting to running Integration Components version check on" $ToCheck -ForegroundColor Green
    Write-Host


    If ($ClusterObject)
    {

        $ClusterNodes = Get-Clusternode -cluster $ClusterObject.Name
        
        #Declare an hashtable to hold all host/IS version values. The hosts are the key here.
        $HostISVersions = @{}
 
        foreach ($ClusterNode in $ClusterNodes)
        {
            Try
            {
                 $HostISVersions[$ClusterNode.Name]=Get-ItemProperty "HKLM:SOFTWAREMicrosoftWindows NTCurrentVersionVirtualizationGuestInstallerVersion" | select -ExpandProperty Microsoft-Hyper-V-Guest-Installer
            }
            Catch
            {
            Write-Host "We could not determine the version of the Integration Services on this host, probably due to this not being a Hyper-V host" -ForegroundColor Orange
            Write-Host "We'll check this for you right now" -ForegroundColor Orange
            $HyperVFeature = Get-WindowsFeature Hyper-V
            If ($HyperVFeature.Installstate -eq "Installed")
            {
              Write-Host "Hyper-V seems to be installed on this node. Something else is wrong." -ForegroundColor Red
            }
            Else
            {
                Write-Host "Hyper-V is indeed not installed on this node." -ForegroundColor Orange
            }
            }
        }
         #Use GetEnumerator or thise sorting thing doesn't work out well on an hash tabel :-)
        $UniqueIcVersions = $HostISVersions.GetEnumerator() | Sort-Object -Property Value -Unique
 
        Write-Host "We've found " $UniqueIcVersions.count "versions on the" $HostISVersions.count "nodes of your cluster" $ClusterObject.Name
 
        ForEach ($IcVersion in $UniqueIcVersions )
        {
            $Counter = 1
            $IcVersionValue = $IcVersion.value
            "IC version " + $IcVersion.value + " is found in:"
            foreach ($Key in ($HostISVersions.GetEnumerator()| Where-Object { $_.value -eq $IcVersionValue}))
            {
                "`t" + "$Counter : " + $Key.Name
                $Counter= $Counter + 1
            }
 
            If ($ExpectedISCVersion)
            {
               
                $CompareVersions = ([Version]$IcVersion.Value).CompareTo([Version]$ExpectedISCVersion)
                        
                switch ($CompareVersions)
                {
                    0 {Write-Host "This version ($IcVersionValue) is equal to the expected version ($ExpectedISCVersion)." -ForegroundColor Green}
                    1 {Write-Host "This version ($IcVersionValue) is higher than the expected version ($ExpectedISCVersion). Please ensure all hosts run the same IC version level." -ForegroundColor Yellow}
                    -1 {Write-Host "This version ($IcVersionValue) is lower than the expected version ($ExpectedISCVersion). Please ensure all hosts run the same IC version level." -ForegroundColor Red}
                }
            }

        }
    }

    Else
    {
        Try
        {
            $HostIcVersion = Get-ItemProperty "HKLM:SOFTWAREMicrosoftWindows NTCurrentVersionVirtualizationGuestInstallerVersion" | select -ExpandProperty Microsoft-Hyper-V-Guest-Installer
            Write-Host "The IS component version on server $localhost is $HostIcVersion"
            If ($ExpectedISCVersion)
            {
               
                   $CompareVersions = ([Version]$HostIcVersion).CompareTo([Version]$ExpectedISCVersion)
                        
                switch ($CompareVersions)
                {
                0 {Write-Host "This version ($HostIcVersion) is equal to the expected version ($ExpectedISCVersion)." -ForegroundColor Green}
                1 {Write-Host "This version ($HostIcVersion) is higher than the expected version ($ExpectedISCVersion). Please check if you need to downgrade your host or if the expected version is correct." -ForegroundColor Yellow}
                -1 {Write-Host "This version ($HostIcVersion) is lower than the expected version ($ExpectedISCVersion). Please check if you need to upgrade your host or if the expected version is correct." -ForegroundColor Red}
                }
            }
        }
        Catch
        {
            Write-Host "We could not determine the version of the Integration Services on this host, probably due to this not being a Hyper-V host" -ForegroundColor yellow
            Write-Host "We'll check this for you right now" -ForegroundColor yellow
            $HyperVFeature = Get-WindowsFeature Hyper-V
            If ($HyperVFeature.Installstate -eq "Installed")
            {
                Write-Host "Hyper-V seems to be installed on this node. Something else is wrong." -ForegroundColor Red
            }
            Else
            {
                Write-Host "Hyper-V is indeed not installed on this node." -ForegroundColor yellow
            }
        }
    }
}
 
CheckHyperVClusterHostsICVersion -Version 6.2.9200.16433 -cluster "MyClusterName"