[Array]$vCenters = @("172.168.1.50","192.168.0.50")
[String]$vCenterUsername="sudershan.bharti@gmail.com"
[String]$vCenterPassword="Passw0rd"
[String]$smtpServer="smtp.gmail.com"
[String]$OutputCsv="C:\Temp\vCenterAlarms.csv" #Where you want to place generated report
[String]$OutputFile="C:\Temp\vCenterAlarms.html" #Where you want to place generated report
$i = 0

Function Set-AlternatingRows {
    [CmdletBinding()]
         Param(
             [Parameter(Mandatory=$True,ValueFromPipeline=$True)]
             [object[]]$HTMLDocument,

             [Parameter(Mandatory=$True)]
             [string]$CSSEvenClass,

             [Parameter(Mandatory=$True)]
             [string]$CSSOddClass
         )
     Begin {
         $ClassName = $CSSEvenClass
     }
     Process {
         [string]$Line = $HTMLDocument
         $Line = $Line.Replace("<tr>","<tr class=""$ClassName"">")
         If ($ClassName -eq $CSSEvenClass)
         {    $ClassName = $CSSOddClass
         }
         Else
         {    $ClassName = $CSSEvenClass
         }
         $Line = $Line.Replace("<table>","<table width=""50%"">")
         Return $Line
     }
}

$Header = @"
<style>
TABLE {border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;}
TH {border-width: 1px;padding: 3px;border-style: solid;border-color: black;background-color: #6495ED;}
TD {border-width: 1px;padding: 3px;border-style: solid;border-color: black;white-space: nowrap;}
.odd  { background-color:#ffffff }
.even { background-color:#dddddd }
</style>
<title>
vCenter Alarms
</title>
"@

Function Get-TriggeredAlarms {
	Write-Host "Connecting to vCenter $_" -foregroundcolor "magenta"
	$vc = Connect-VIServer $vCenter -User $vCenterUsername -Password $vCenterPassword

	$rootFolder = Get-Folder -Server $vc "Datacenters"

	foreach ($ta in $rootFolder.ExtensionData.TriggeredAlarmState) {
		$alarm = "" | Select-Object VC, EntityType, Alarm, Entity, Status, Time, Acknowledged, AckBy, AckTime
		$alarm.VC = $vCenter
		$alarm.Alarm = (Get-View -Server $vc $ta.Alarm).Info.Name
		$entity = Get-View -Server $vc $ta.Entity
		$alarm.Entity = (Get-View -Server $vc $ta.Entity).Name
		$alarm.EntityType = (Get-View -Server $vc $ta.Entity).GetType().Name
		if($ta.OverallStatus -eq "yellow"){
        	$Alertcode = "Orange"
		}
		elseif($ta.OverallStatus -eq "red"){
        	$Alertcode = "red"
		}
		else{
			$Alertcode = "black"
		}
		$alarm.Status = "<p style=color:" + $Alertcode + "; >" + $ta.OverallStatus + "</p>"
		$alarm.Time = $ta.Time
		$alarm.Acknowledged = $ta.Acknowledged
		$alarm.AckBy = $ta.AcknowledgedByUser
		$alarm.AckTime = $ta.AcknowledgedTime
		$alarm
		$i++
		Write-Progress -Activity "Looking up Alarms" -Status "Current alarm: $i in $vCenter" -PercentComplete ($i/$rootFolder.ExtensionData.TriggeredAlarmState.count*100)
	}
	Disconnect-VIServer $vCenter -Confirm:$false
}

Write-Host ("Getting the alarms from {0} vCenters." -f $vCenters.Length)

$alarms = @()
foreach ($vCenter in $vCenters) {
	Write-Host "Getting alarms from $vCenter."
	$alarms += Get-TriggeredAlarms $vCenter
}
#$alarms = $alarms | Where {$_.EntityType -ne "VirtualMachine"} | sort-object -Property VC
$alarms = $alarms | sort-object -Property VC
$alarms | Export-Csv -Path $OutputCsv -NoTypeInformation
$alarms = $alarms | ConvertTo-Html -Head $Header | Set-AlternatingRows -CSSEvenClass even -CSSOddClass odd | foreach {$_.replace("<","<").replace(">",">")} | Out-File $OutputFile

$emailBody = Get-Content $OutputFile
Send-MailMessage -From "vCenterAlarms@Gmail.com" -To "sudershan.bharti@gmail.com" -Subject "vCenter Hardware Alarm Report" -Body ($emailBody | Out-String) -BodyAsHtml -Priority High -Attachments $OutputCsv -SmtpServer $smtpServer