Monitor-VMGuests

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posted by Richard Giles

02-27-2009

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Monitor-VMGuests

# Jonathan Medd, Alan Renouf  
# http://jonathanmedd.blogspot.com/2009/01/using-powershell-to-monitor-vmware.html 
# check the cpu.usage.average statistic of a period of the last few minutes (watch out for the -IntervalMins parameter it can produce a period slightly different to what you would expect) and if its over 99% run the CheckHighCPU function and send the results by email. 
# Requires: VI Toolkit 
 
Function EmailWarning () 
{ 
    param ($ServerName,$Attachment) 
    #Email warning 
    Write-Output "Creating E-Mail Structure" 
     
    $smtpServer = "servername" 
     
    $msg = new-object Net.Mail.MailMessage 
    $att = new-object Net.Mail.Attachment($attachment) 
    $smtp = new-object Net.Mail.SmtpClient($smtpServer) 
     
    $msg.From = "sender" 
    $msg.To.Add("recipient") 
    $msg.Subject = "Server Warning - High CPU on $Servername" 
    $msg.Body = "$Servername has a CPU value of $HighCPU %" 
    $msg.Attachments.Add($att) 
     
    Write-Output "Send E-Mail" 
    $smtp.Send($msg) 
     
    $att.Dispose(); 
} 
 
Function CheckHighCPU () 
{ 
    param ($Target) 
     
    $procs_total = Get-WmiObject -Class Win32_PerfRawData_PerfProc_Process -Filter 'name="_total"' -ComputerName $Target 
    $procs = Get-WmiObject -Class Win32_PerfRawData_PerfProc_Process -Filter 'name<>"_total"' -ComputerName $Target 
     
    [int64]$totalpercentuser = 0 
    foreach ($proc in $procs_total) 
    { 
        $totalpercentuser = $totalpercentuser + $proc.PercentUserTime} 
         
        [decimal] $perc = [System.Convert]::ToDecimal($totalpercentuser) 
         
        $myCol = @() 
        foreach ($proc in $procs) 
        { 
            $proc_perct = (($proc.PercentUserTime / $perc) * 100) 
            if ($proc_perct -gt 1){ 
            $Process = Get-WmiObject win32_process -ComputerName $target | where {$_.ProcessID -eq $proc.IDProcess} 
            $MYInfo = "" | select-Object Name, CPUUsage,Owner, ProcessID 
            $MYInfo.Name = $proc.name 
            $MYInfo.ProcessID = $proc.IdProcess 
            $MYInfo.CPUUsage = [Math]::Round($proc_perct, 0) 
            $MYInfo.Owner = $process.GetOwner().user 
            $myCol += $MYInfo 
        } 
    } 
 
    $myCol | Sort-Object CPUUsage -Descending | Out-File $file 
    EmailWarning $VMname $file 
} 
 
Connect-VIServer servername 
$vms = Get-Cluster | where {$_.name -eq "ClusterName"} | get-vm 
$time = Get-Date 
 
do  
{ 
    foreach ($vm in $vms) 
    { 
        $VMname = $vm.name 
        $filename = $VMname + '.txt' 
        $file = "C:\Scripts\$filename" 
        $stats = Get-Stat -entity $vm -IntervalMins 2 -stat cpu.usage.average -MaxSamples 1 
        write-host $VMname 
        $stats 
         
        if ($stats.value -ge 99) 
        { 
            $HighCPU = $stats.value 
            Write-Host "Warning!" -ForegroundColor red 
            CheckHighCPU $VMname 
        } 
        else 
        { 
        } 
    } 
 
    Start-Sleep -Seconds 30 
} until ($time.hour -ge 17) 

Filed under: VMware, Monitor, Guests

Check the cpu.usage.average statistic of a period of the last few minutes (watch out for the -IntervalMins parameter it can produce a period slightly different to what you would expect) and if its over 99% run the CheckHighCPU function and send the results by email.

Attributed To: Jonathan Medd, Alan Renouf

URL: http://jonathanmedd.blogspot.com/2009/01/using-powershell-to-monitor-vmware.html