Extending a disk on a window system using PowerShell and PowerCLI

Identify the correct disk to extend on OS

param(

[string]$drivename #ex: C or D

$percentage = 1.1

)

try{

$moddrivename = $drivename + ":"

$extendnumber = [math]::Round(((Get-WmiObject -Class Win32_LogicalDisk | where DeviceID -like $moddrivename | select -ExpandProperty Size) /1TB)*$percentage)

if ($extendnumber -ge 2) {

return "2TBDisk"

}

$searchstring = '\\' +$env:computername+ '\root\cimv2:Win32_LogicalDisk.DeviceID="' +$drivename+ ':"'

$disknumberlong = Get-WmiObject -Class Win32_LogicalDiskToPartition | where Dependent -Like $searchstring | select -ExpandProperty Antecedent

$disknumberlong -match 'Disk #(\d+)' | out-null

$disknumber = $matches[0].split('#')[1]

return $disknumber

} catch {

throw

}

Extending VM disk

param(

[String]$serverfqdn,

[String]$disknumber, #passed from the previous script

[double]$percentage=1.1 #percentage at which the disk should be extended by

)

Get-Module -Name VMware* -ListAvailable | Import-Module #call PowerCLI module

$vcusername = ''

$vcpassword = ''

$hostname = $serverfqdn.split(".")[0]

if ($hostname -like 'some naming convention') {

$vcservers = @("vc1","vc2")

foreach ($vc in $vcservers) {

Connect-VIServer -Server $vc -User $vcusername -Password $vcpassword

if ($vm = Get-VM $hostname) {

$correctvc = $vc

break

}

else {

Disconnect-VIServer -Server $vc -Confirm:$false

continue

}

}

} elseif ($hostname -like 'some naming convention 2') {

$vcservers = @("vc3","vc4")

foreach ($vc in $vcservers) {

Connect-VIServer -Server $vc -User $vcusername -Password $vcpassword

if ($vm = Get-VM $hostname) {

$correctvc = $vc

break

}

else {

Disconnect-VIServer -Server $vc -Confirm:$false

continue

}

}

}

#we assume most disks are using the first controller

$SCSI = '0:'+$disknumber

#heres the tricky part, pass each disk on the VM to get-scsicontroller which returns it's respective busnumber and unit number. Then get the disk name by filtering the result using the $SCSI variable.

$diskname = Get-VM $hostname | Get-HardDisk | Select @{N='VM';E={$_.Parent.Name}},Name,@{N='Node';E={'{0}:{1}' -f ((Get-ScsiController -HardDisk $_).ExtensionData.BusNumber),$_.ExtensionData.UnitNumber}} | where Node-like $SCSI | select Name -ExpandProperty Name

$disksize = Get-HardDisk -VM $hostname | where {$_.Name -eq $diskname} | select -ExpandProperty CapacityGB

$newdisksize = $disksize*$percentage

Write-Host $newdisksize

Get-HardDisk -VM $hostname | where {$_.Name -eq $diskname} | Set-HardDisk -CapacityGB $newdisksize -confirm:$false

Disconnect-VIServer -Server $correctvc -Confirm:$false

Extending disk on OS

param(

[string]$drivename,

[double]$percentage=0.1

)

try{

"RESCAN" | diskpart

$moddrivename = $drivename + ":"

$extendnumber = [math]::Round(((Get-WmiObject -Class Win32_LogicalDisk | where DeviceID -like $moddrivename | select -ExpandProperty Size) /1MB)*$percentage)

write-host $extendnumber

$searchstring = '\\' +$env:computername+ '\root\cimv2:Win32_LogicalDisk.DeviceID="' +$drivename+ ':"'

$disknumberlong = Get-WmiObject -Class Win32_LogicalDiskToPartition | where Dependent -Like $searchstring | select -ExpandProperty Antecedent

$disknumberlong -match 'Disk #(\d)'

$disknumber = $matches[0].split('#')[1]

$string1 = "select disk " + $disknumber

$string2 = "select volume " + $drivename

$string3 = "extend size=" + $extendnumber

$commands = @(

$string1,

$string2,

$string3

)

$commands | diskpart

Write-Host "Disk extension on OS layer completed"

exit 0

} catch {

Write-Host "Disk extension on OS layer failed"

exit -1

}

Common SSL/TLS vulnerability fixes

SSL/TLS Diffie-Hellman Modulus <= 1024 Bits (Logjam)

Configure the following registry and restart the server

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\KeyExchangeAlgorithms\Diffie-Hellman]

"ServerMinKeyBitLength"=dword:00000800

Transport Layer Security (TLS) Protocol CRIME Vulnerability - Splunkd port 8089

Change allowSslCompression = true to false and restart splunkforwarder service

C:\Program Files\SplunkUniversalForwarder\etc\system\default>more server.conf | findstr allowSslCompression

allowSslCompression = false

SSL/TLS Diffie-Hellman Modulus <= 1024 Bits (Logjam)

Add the following line in sshd_config and restart sshd service

# Ciphers and keying

Ciphers chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com

 

Shutdown and Startup VMs using PowerCLI

Shutdown

param (

[Parameter(Mandatory=$true)]

$serverslistfile

)

function writetolog([string] $txt) {

$Stamp = (Get-Date).toString("yyyy/MM/dd HH:mm:ss")

Add-content $logfile -value $Stamp':'$txt

}

$vCenter = 'vcentername'

$logfile = 'C:\Windows\Temp\DR_ShutdownVMs.log'

$serverslist = Get-Content $serverslistfile

Write-host "############################## ABC company DR activity - Shutdown VMs ##############################"

writetolog("############################## ABC company DR activity - Shutdown VMs ##############################")

Write-Host "vCenter server selected : "$vCenter

writetolog("vCenter server selected : " + $vCenter)

Write-Host "Servers list selected : "

writetolog("Servers list selected : ")

$serverslist | ForEach-Object { Write-Host $_ ; writetolog($_) }

$Confirm = Read-Host "Please type 'ok' to confirm selection is correct"

if($Confirm -eq 'ok') {

writetolog("Proceed: OK by $env:UserName")

try{

Connect-VIServer $vCenter

Write-Host "Successfully connected to $vCenter vCenter"

writetolog("Successfully connected to $vCenter vCenter")

} catch {

Write-Host "Cannot connect to $vCenter vCenter, Exiting Program"

writetolog("Cannot connect to $vCenter vCenter, Exiting Program")

exit -1

}

$serverslist | foreach-object {

if((Get-VM $_ | select -ExpandProperty PowerState) -eq "PoweredOn") {

try {

shutdown-vmguest $_ -Confirm:$false | Out-Null

Write-Host $_ "Shutdown-ed"

writetolog($_ + " Shutdown-ed")

} catch{

Write-host $_ "Error"

writetolog($_ + " Error Shutting down")

}

} else {

Write-host $_ "Already Powered Down"

writetolog($_ + " Already Powered Down")

}

}

Disconnect-VIServer $vCenter -Confirm:$false

Write-Host "Successfully disconnected from $vCenter vCenter"

writetolog("Successfully disconnected from $vCenter vCenter")

} else {

exit

}

Startup

param (

[Parameter(Mandatory=$true)]

$serverslistfile

)

function writetolog([string] $txt) {

$Stamp = (Get-Date).toString("yyyy/MM/dd HH:mm:ss")

Add-content $logfile -value $Stamp':'$txt

}

$vCenter = 'vcentername'

$logfile = 'C:\Windows\Temp\DR_PowerOnVMs.log'

$serverslist = Get-Content $serverslistfile

Write-host "############################## ABC company R activity - Power On VMs ##############################"

writetolog("############################## ABC company DR activity - Power On VMs ##############################")

Write-Host "vCenter server selected : "$vCenter

writetolog("vCenter server selected : " + $vCenter)

Write-Host "Servers list selected : "

writetolog("Servers list selected : ")

$serverslist | ForEach-Object { Write-Host $_ ; writetolog($_) }

$Confirm = Read-Host "Please type 'ok' to confirm selection is correct"

if($Confirm -eq 'ok') {

writetolog("Proceed: OK by $env:UserName")

try{

Connect-VIServer $vCenter

Write-Host "Successfully connected to $vCenter vCenter"

writetolog("Successfully connected to $vCenter vCenter")

} catch {

Write-Host "Cannot connect to $vCenter vCenter, Exiting Program"

writetolog("Cannot connect to $vCenter vCenter, Exiting Program")

exit -1

}

$serverslist | foreach-object {

if((Get-VM $_ | select -ExpandProperty PowerState) -eq "PoweredOff") {

try {

Start-VM $_ -Confirm:$false | out-null

Write-Host $_ "Powered On"

writetolog($_ + " Powered On")

} catch{

Write-host $_ "Error"

writetolog($_ + " Error Powering On")

}

} else {

Write-host $_ "Already Powered On"

writetolog($_ + " Already Powered On")

}

}

Disconnect-VIServer $vCenter -Confirm:$false

Write-Host "Successfully disconnected from $vCenter vCenter"

writetolog("Successfully disconnected from $vCenter vCenter")

} else {

exit

}