A script to shutdown a vSphere Cluster.

Shutdown-vSphereCluster.ps1

<#
    .SYNOPSIS
    No parameters needed. Just execute the script.

    .DESCRIPTION
    This script will shut down all VMs, the ESXi hosts that were running the VMs, the vCenter VM
    and, at the end, the ESXi host that was running the vCener VM.

    Please modify all necessary variables. Make sure that you read the comments!
     
   .EXAMPLE
    Shutdown-vSphereCluster
    
   .NOTES
    Author: Patrick Terlisten, patrick@blazilla.de, Twitter @PTerlisten
    
    This script is provided “AS IS” with no warranty expressed or implied. Run at your own risk.

    This work is licensed under a Creative Commons Attribution NonCommercial ShareAlike 4.0
    International License (https://creativecommons.org/licenses/by-nc-sa/4.0/).
    
   .LINK
    http://www.vcloudnine.de
#>

# vCenter Server
# I recommend to create a new VICredentialStoreItem and use this to connect to the vCenter Server
$VIServer = 'vcenter.domain.tld'
$VIServerVMName = 'NameofvCenterVM'

# ESXi Host that is running vCenter Server Appliance
$ESXHost = 'esx.domain.tld'

# To create an encrypted password file, execute the following command
# Read-Host -AsSecureString | ConvertFrom-SecureString | Out-File securestring.txt
# Fill $CredFileVIServer and $CredFileESXHost with path to the securestring file.
$CredFileVIServer = 'C:\Scripts\securestring-vcenter.txt'
$UsernameVIServer = 'Administrator@ad.domain.tld'
$PasswordVIServer = (Get-Content $CredFileVIServer | ConvertTo-SecureString)
$CredVIServer = New-Object System.Management.Automation.PSCredential ($UsernameVIServer, $PasswordVIServer)

$CredFileESXHost = 'C:\Scripts\securestring-esxi.txt'
$UsernameESXHost = 'root'
$PasswordESXHost = (Get-Content $CredFileESXHost | ConvertTo-SecureString)
$CredESXHost = New-Object System.Management.Automation.PSCredential ($UsernameESXHost, $PasswordESXHost)

# Connect to vCenter Server
Write-Host `n
Write-Host "Connecting to vCenter Server $VIServer" -ForegroundColor Green
Connect-VIServer -Server $VIServer -Credential $CredVIServer | Out-Null

# Name of the folder which contains VMs that should be shut down
$VMFolderName = 'PRODUKTION'

# Build an array with all VMs that should be shut down
$ShutdownVMs = (Get-Folder $VMFolderName | Get-VM)

# For every object in the array...
$ShutdownVMs | ForEach-Object {
    
    # Tell me what you're doing...
    Write-Host "### Shutdown VM $_ ###" -ForegroundColor Green
    Stop-VMGuest $_ -Confirm:$false | Out-Null
}

# Wait 5 minutes
Write-Host '### Waiting 5 Minutes to let the VMs shutdown gracefully ###' -ForegroundColor Green
Start-Sleep 300

# Put hosts into maintenenace mode. Duplicate lines for each ESXi you wish to shutdown.
Write-Host '### Bringing hosts into maintenance mode ###' -ForegroundColor Green
Set-VMHost -VMHost esx.domain.tld -State Maintenance -Confirm:$false | Out-Null

# Shutdown ESXi hosts
Write-Host '### Initiate host shutdown ###' -ForegroundColor Green
Stop-VMHost -VMHost esx.domain.tld -Confirm:$false -Force | Out-Null

# Disconnect from vCenter Server
Write-Host "Disconnecting from vCenter Server $VIServer" -ForegroundColor Green
Disconnect-VIServer -Server $VIServer -Force -Confirm:$false | Out-Null

# Connect to ESXi Host which is running the vCenter VM
Write-Host "`n"
Write-Host "Connecting to ESXi Host $ESXHost which is running vCenter Server Appliance" -ForegroundColor Green
Connect-VIServer -Server $ESXHost -Credential $CredESXHost | Out-Null

# Tell me what you're doing...
Write-Host "### Shutdown vCenter Server Appliance $VIServerVMName ###" -ForegroundColor Green
Stop-VMGuest $VIServerVMName -Confirm:$false | Out-Null

# Wait 2 minutes
Write-Host '### Waiting 2 Minutes to let the vCenter VM shutdown gracefully ###' -ForegroundColor Green
Start-Sleep 120

Write-Host "### Bringing host $ESXHost into maintenance mode ###" -ForegroundColor Green
Set-VMHost -VMHost $ESXHost -State Maintenance -Confirm:$false | Out-Null

Write-Host "### Initiate shutdown of $ESXHost ###" -ForegroundColor Green
Stop-VMHost -VMHost $ESXHost -Confirm:$false -Force | Out-Null

Write-Host "Disconnecting from ESXi Host $ESXHost" -ForegroundColor Green
Disconnect-VIServer -Server $ESXHost -Force -Confirm:$false | Out-Null

Write-Host 'Script finished! Hope everything was shut down properly...' -ForegroundColor Green

Thank a lot!