## Connect to the vCenters 

Start-Transcript -path C:\Temp\HostReboot-StuckNvME.txt
$startdate = (get-date) 
$filepath = "C:\Temp"
$ClusterName = "DEV-Cluster"
$filename = $ClusterName

### Stop SSH Post Reboot
  
Get-Cluster $ClusterName | Get-VMHost | ForEach {Stop-VMHostService -HostService ($_ |
Get-VMHostService | Where {$_.Key -eq “TSM-SSH”}) -Confirm:$false}

## Reboot Cycle of all hosts
cd C:\Temp\

(Get-Cluster $ClusterName | Get-VMHost).Name | Out-File $filepath\$filename".txt" 


##  Reboot Cycle Script block
Get-Content .\$filename".txt" | %{ 
    $Server = $_;
    Write-Host -ForegroundColor Green "$Server"
    Write-Host -ForegroundColor Yellow "`tServer is entering maintenance mode"
    Set-VMHost $Server -State maintenance -Evacuate | Out-Null
    Write-Host -ForegroundColor Yellow -NoNewline "`tServer Rebooting"
    Restart-VMHost $Server -Confirm:$false  | Out-Null

## Wait 1min to check connection state post reboot command  
    do {
        sleep 1
        $ServerState = (Get-VMHost $Server).ConnectionState
        Write-Host -ForegroundColor Yellow -NoNewline "."
    } while ($ServerState -ne "NotResponding")
    Write-Host -ForegroundColor Yellow -NoNewline "(Server is down)"

## Wait Another 1min to check connection state up post reboot command   

    do {
        sleep 1
        $ServerState = (Get-VMHost $Server).ConnectionState
        Write-Host -ForegroundColor Yellow -NoNewline "`."
    } while ($ServerState -ne "Maintenance")
    Write-Host -ForegroundColor Yellow "(Server Booted Up)"

## Exit Maintenance Mode and once complete move on to next host 
  
    Write-Host -ForegroundColor Yellow "`tExiting maintenance mode"
    Set-VMHost $Server -State Connected  | Out-Null
    Write-Host -ForegroundColor Yellow "`tReboot Cycle Done!"
    Write-Host ""
}

$enddate = (get-date)
$diff= New-TimeSpan -Start $startdate -End $enddate
Write-Host "It took" $diff " hours to complete the task" 

Stop-Transcript