Emergency Shutdown

# Get Credentials
$Cred = Get-Credential -UserName 'user@domain.tld' -Message 'Please Enter Domain Admin Credentials'
$ADMachines = Get-ADComputer -Properties * -filter {OperatingSystem -like "*server*"}
$Online = @()
$Offline = @()
if (Test-Path $env:USERPROFILE\Desktop\onlineservers.txt) {Remove-Item $env:USERPROFILE\Desktop\onlineservers.txt}
if (Test-Path $env:USERPROFILE\Desktop\offlineservers.txt) {Remove-Item $env:USERPROFILE\Desktop\offlineservers.txt}
if (Test-Path $env:USERPROFILE\Desktop\out.log) {Remove-Item $env:USERPROFILE\Desktop\out.log}
foreach ($Machine in $ADMachines) {
    if (Test-Connection -count 1 -quiet -computer $Machine.Name) {
    $Online += $Machine.Name }
    else {
    $Offline += $Machine.Name }
}
Write-Output "Online: " $Online | Out-File -FilePath $env:USERPROFILE\Desktop\onlineservers.txt -Append
Write-Output "Offline: " $Offline | Out-File -FilePath $env:USERPROFILE\Desktop\offlineservers.txt -Append

$Servers = $Online | Where-Object { ($_ -notmatch 'DC1') -and ($_ -notmatch 'DC2') -and ($_ -notmatch 'DC3') -and ($_ -notmatch 'DC4') -and ($_ -notmatch 'Host1') -and ($_ -notmatch 'Host2') -and ($_ -notmatch 'Host3') -and ($_ -notmatch 'Cluster1')}

Write-Host Shutting down servers $Servers -ForegroundColor Yellow -BackgroundColor Red

foreach ($Server in $Servers) {
  $Session = New-PSSession -ComputerName $Server -Credential $Cred
  Invoke-Command -Session $Session -ScriptBlock {Stop-Computer -Force}
}

<# how to store a password as secure string
read-host -assecurestring | convertfrom-securestring | out-file C:\securestring.txt
#>

<# This part doesnt quite work becuase of sudo
Write-Host "Shutting down Linux Servers." -ForegroundColor Yellow -BackgroundColor Red
$LinuxServers = @("deb1.domain.tld","deb2.domain.tld")
$LinuxUser = "user"
$LinuxPass = cat C:\securestring.txt | convertto-securestring
$LinuxCred = new-object -typename System.Management.Automation.PSCredential -argumentlist $LinuxUser, $LinuxPass
Foreach ($LinuxServer in $LinuxServers) {
  $a=New-SSHSession -Computername $LinuxServer -AcceptKey -Credential $LinuxCred
  Invoke-SSHCommand $a.sessionid -Command "sudo halt -p"
}
#>

Write-Host "Shutting down Virtual Domain Controllers." -ForegroundColor Yellow -BackgroundColor Red

$VirtDCs = @("DC1","DC2","DC3")
foreach ($VirtDC in $VirtDCs) {
  $Session = New-PSSession -ComputerName $VirtDC -Credential $Cred
  Invoke-Command -Session $Session -ScriptBlock {Stop-Computer -Force}
}


Write-Host "Shutting down Virtual Hosts."  -ForegroundColor Yellow -BackgroundColor Red

$VMHosts = @("Host1","Host2","Host3")
foreach ($VMHost in $VMHosts) {
  $Session = New-PSSession -ComputerName $VMHost -Credential $Cred
  Invoke-Command -Session $Session -ScriptBlock {Stop-Computer -Force}
}


Write-Host "Shutting down physical domain controller." -ForegroundColor Yellow -BackgroundColor Red

$PhysDCs = @("DC4")
foreach ($PhysDC in $PhysDCs) {
  $Session = New-PSSession -ComputerName $PhysDC -Credential $Cred
  Invoke-Command -Session $Session -ScriptBlock {Stop-Computer -Force}
}


Write-Host  "All servers shut down gracefully." -ForegroundColor Yellow -BackgroundColor Red