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  1. # Get a VM\'s last power on date based on the VM\'s events.
    2. \
  2. # Requires PowerCLI 4.0 and PowerShell v2.
    3. \
  3. function Get-LastPowerOn {
    4. \
  4.         param(
    5. \
  5.         [Parameter(
    6. \
  6.             Mandatory=$true,
    7. \
  7.             ValueFromPipeline=$true,
    8. \
  8.             HelpMessage="VM"
    9. \
  9.         )]
    10. \
  10.         [VMware.VimAutomation.Types.VirtualMachine]
    11. \
  11.         $VM
    12. \
  12.         )
    13. \
  13.  
    14. \
  14.         Process {
    15. \
  15.                 # Patterns that indicate an attempt to power a VM on. This differ
    16. \
  16.                 # across versions and likely across language. Please add your own
    17. \
  17.                 # if you find one missing.
    18. \
  18.                 $patterns = @(
    19. \
  19.                         "*Power On virtual machine*",   # vCenter 4 English
    20. \
  20.                         "*is starting*"                                 # ESX 4/3.5 English
    21. \
  21.                 )
    22. \
  22.  
    23. \
  23.                 $events = $VM | Get-VIEvent
    24. \
  24.                 $qualifiedEvents = @()
    25. \
  25.                 foreach ($pattern in $patterns) {
    26. \
  26.                         $qualifiedEvents += $events | Where { $_.FullFormattedMessage -like $pattern }
    27. \
  27.                 }
    28. \
  28.                 $qualifiedEvents = $qualifiedEvents | Where { $_ -ne $null }
    29. \
  29.                 $sortedEvents = Sort-Object -InputObject $qualifiedEvents -Property CreatedTime -Descending
    30. \
  30.                 $event = $sortedEvents | select -First 1
    31. \
  31.  
    32. \
  32.                 $obj = New-Object PSObject
    33. \
  33.                 $obj | Add-Member -MemberType NoteProperty -Name VM -Value $_
    34. \
  34.                 $obj | Add-Member -MemberType NoteProperty -Name PowerState -Value $_.PowerState
    35. \
  35.                 $obj | Add-Member -MemberType NoteProperty -Name LastPoweron -Value $null
    36. \
  36.                 if ($event) {
    37. \
  37.                         $obj.LastPoweron = $event.CreatedTime
    38. \
  38.                 }
    39. \
  39.  
    40. \
  40.                 Write-Output $obj
    41. \
  41.         }
    42. \
  42. }
    43. \
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