VMware PowerCLI PowerShell script to shutdown VMs that would be left running on an ESX host entering maintenance mode

evac_maint.ps1

# Connect to vCenter
Connect-VIServer -Server 192.168.0.10 -user administrator@vsphere.local -password <password>
# Get the HostId of the VM Host entering maintenance mode - assuming only one Host in a Data Center at a time
$hostid = Get-Task Running | where {$_.name -eq "EnterMaintenanceMode_Task"} | select ObjectId
# If there is a result then shutdown all the VMs that match the name given
if (-not ([string]::IsNullOrEmpty($hostid)))
{
  # Get the VM Host name by the ObjectId
  $esxhost = Get-VMHost | where {$_.Id -eq $hostid.ObjectId}
  # Shutdown the VM given by the wildcard - in this case any machine begninning with Gluster running on that host
  Get-VMHost -name $esxhost | Get-VM Gluster* | Shutdown-VMGuest -confirm:$false
}