September 2012 – The Tech Depot

So here’s a little nugget that might help you at the end of backup sessions, or in my case, to adjust for the time zone difference on my vacation after forgetting to check my cameras clock for the entire 2 week duration. Despite it’s simplicity, this script is in fact quite powerful, and if used towards the wrong folder, or with the wrong scope (Get-Childitem -recurse) it can cause a bit of damage.

A fun thing about this script is that by changing the time parameter, you can actually put the Date Modified field into the future without changing the clock on your computer

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<# v1.0 - 26.09.2012
By Reidar J 
. Boldevin
http://www.boldevin.com
#>

$files = Get-ChildItem | where {$_.PsIsContainer -eq $false}

foreach ($file in $files) {
    $date = (Get-Date ($file | ft lastwritetime -HideTableHeaders | Out-String)).adddays(-8) #Modify negative number of days to subtract
    $date = $date.addhours(-1) #Modify negative number of hours to subtract
    $date = $date.addminutes(-30) #Modify negative number of minutes to subtract
#    $date = $date.addseconds(0) # Uncomment and Modify negative number of minutes to subtract
    $file.LastWriteTime = $date
    }

<# v1.0 - 26.09.2012

By Reidar J

. Boldevin

http://www.boldevin.com

$files = Get-ChildItem | where {$_.PsIsContainer -eq $false}

foreach ($file in $files) {

$date = (Get-Date ($file | ft lastwritetime -HideTableHeaders | Out-String)).adddays(-8) #Modify negative number of days to subtract

$date = $date.addhours(-1) #Modify negative number of hours to subtract

$date = $date.addminutes(-30) #Modify negative number of minutes to subtract

# $date = $date.addseconds(0) # Uncomment and Modify negative number of minutes to subtract

$file.LastWriteTime = $date

}

I use this script to deploy one or more identical servers in Hyper-V

. The script handles both the use of a Golden Image template .VHDX file, or a clean installation using an ISO install image and will provide you with a question by question gathering of the most common installation parameters

Prerequisites:

Windows Server 2012 release candidate or above
Powershell 3.0
Hyper-V role installed on the server
Hyper-V Powershell module installed on the server
A template VHDX file for each operating system you’d like to be able to deploy
ISO-files for each operating system you’d like to be able to deploy

<#
v1.0 - 25.09.2012
By Reidar J 
. Boldevin
#>

# Specify the local path for your virtul machines and hard disks
$vmpath = 'D:\Hyper-V\Virtual Machines\Virtual Machines\'
$vmdiskpath = 'D:\hyper-v\Virtual Hard Disks\'

# Query the user on installation parameters
[int]$vmcount = Read-Host "How many identical servers would you like to create?"
$vmname = Read-Host "What would you like to call the servers (numbers will be added)?"

[int64]$vmminram = 1MB*(Read-Host "Minimum memory in megabytes?")
[int64]$vmmaxram = 1MB*(Read-Host "Maximum memory in megabytes?")
[int64]$vhdsize = 1GB*(Read-Host "How big would you like the system disk to be (in gigabytes)?")

# Give the user options to create new VM's based on a template VHDX-file or through a clean installation with a pre mounted ISO-file
Write-Host "1. Windows Server 2008R2
2. Windows Server 2012RC"
$vmversion = Read-Host "What server version would you like to install?"
if ($vmversion -eq '1') {
 $vmmount = 'C:\warez\en_windows_server_2008_r2_standard_enterprise_datacenter_and_web_with_sp1_x64_dvd_617601.iso'
 $vmtemplate = 'D:\Templates\2008R2_template1.vhdx'
 }
elseif ($vmversion -eq '2') {
 $vmmount = 'C:\warez\en_windows_server_2012_release_candidate_datacenter_x64_dvd_863833.iso'
 $vmtemplate = 'D:\Templates\2012_template1.vhdx'
 }

cls
# Functions to create new or copy server from template
function Create-NewServer {
 $vmcounter = 1
 while ($vmcounter -le $vmcount) {
 $vmnewpath = "$vmdiskpath$vmname$vmcounter.vhdx"
 New-VM -Name $vmname$vmcounter -Path "$vmpath$vmname$vmcounter" -MemoryStartupBytes $vmminram -NewVHDPath $vmnewpath -NewVHDSizeBytes $vhdsize -SwitchName 'Physical to Virtual'
 Set-VMMemory -VMName $vmname$vmcounter -DynamicMemoryEnabled $true -MinimumBytes $vmminram -MaximumBytes $vmmaxram
 Set-VMDvdDrive -VMName $vmname$vmcounter -Path $vmmount
 $vmcounter ++
 }
 }

function Copy-TemplateServer {
 $vmcounter = 1
 while ($vmcounter -le $vmcount) {
 $vmnewpath = "$vmdiskpath$vmname$vmcounter.vhdx"
 Copy-Item $vmtemplate $vmnewpath
 Set-ItemProperty $vmnewpath -Name IsReadOnly -Value $false
 New-VM -Name $vmname$vmcounter -Path "$vmpath$vmname$vmcounter" -MemoryStartupBytes $vmminram -SwitchName 'Physical to Virtual' -VHDPath $vmnewpath
 Set-VMMemory -VMName $vmname$vmcounter -DynamicMemoryEnabled $true -MinimumBytes $vmminram -MaximumBytes $vmmaxram
 $vmcounter ++
 }
 Write-Host "NB. Remember to run Sysprep with Generalize option after booting the server!"
 }

# Query the user to create a new server, or to copy from an exisiting template
Write-Host "1. Copy an exitising template"
Write-Host "2. New server from scratch"
[int]$deploytype = Read-Host "Would you like to copy a template or install a new server from scratch?"

if ($deploytype -eq 1) { Copy-TemplateServer }
elseif ($deploytype -eq 2) { Create-NewServer }
else { Write-Host "Not a valid option" }

v1.0 - 25.09.2012

By Reidar J

. Boldevin

# Specify the local path for your virtul machines and hard disks

$vmpath = 'D:\Hyper-V\Virtual Machines\Virtual Machines\'

$vmdiskpath = 'D:\hyper-v\Virtual Hard Disks\'

# Query the user on installation parameters

[int]$vmcount = Read-Host "How many identical servers would you like to create?"

$vmname = Read-Host "What would you like to call the servers (numbers will be added)?"

[int64]$vmminram = 1MB*(Read-Host "Minimum memory in megabytes?")

[int64]$vmmaxram = 1MB*(Read-Host "Maximum memory in megabytes?")

[int64]$vhdsize = 1GB*(Read-Host "How big would you like the system disk to be (in gigabytes)?")

# Give the user options to create new VM's based on a template VHDX-file or through a clean installation with a pre mounted ISO-file

Write-Host "1. Windows Server 2008R2

2. Windows Server 2012RC"

$vmversion = Read-Host "What server version would you like to install?"

if ($vmversion -eq '1') {

$vmmount = 'C:\warez\en_windows_server_2008_r2_standard_enterprise_datacenter_and_web_with_sp1_x64_dvd_617601.iso'

$vmtemplate = 'D:\Templates\2008R2_template1.vhdx'

}

elseif ($vmversion -eq '2') {

$vmmount = 'C:\warez\en_windows_server_2012_release_candidate_datacenter_x64_dvd_863833.iso'

$vmtemplate = 'D:\Templates\2012_template1.vhdx'

}

cls

# Functions to create new or copy server from template

function Create-NewServer {

$vmcounter = 1

while ($vmcounter -le $vmcount) {

$vmnewpath = "$vmdiskpath$vmname$vmcounter.vhdx"

New-VM -Name $vmname$vmcounter -Path "$vmpath$vmname$vmcounter" -MemoryStartupBytes $vmminram -NewVHDPath $vmnewpath -NewVHDSizeBytes $vhdsize -SwitchName 'Physical to Virtual'

Set-VMMemory -VMName $vmname$vmcounter -DynamicMemoryEnabled $true -MinimumBytes $vmminram -MaximumBytes $vmmaxram

Set-VMDvdDrive -VMName $vmname$vmcounter -Path $vmmount

$vmcounter ++

}

function Copy-TemplateServer {

$vmcounter = 1

while ($vmcounter -le $vmcount) {

$vmnewpath = "$vmdiskpath$vmname$vmcounter.vhdx"

Copy-Item $vmtemplate $vmnewpath

Set-ItemProperty $vmnewpath -Name IsReadOnly -Value $false

New-VM -Name $vmname$vmcounter -Path "$vmpath$vmname$vmcounter" -MemoryStartupBytes $vmminram -SwitchName 'Physical to Virtual' -VHDPath $vmnewpath

Set-VMMemory -VMName $vmname$vmcounter -DynamicMemoryEnabled $true -MinimumBytes $vmminram -MaximumBytes $vmmaxram

$vmcounter ++

}

Write-Host "NB. Remember to run Sysprep with Generalize option after booting the server!"

}

# Query the user to create a new server, or to copy from an exisiting template

Write-Host "1. Copy an exitising template"

Write-Host "2. New server from scratch"

[int]$deploytype = Read-Host "Would you like to copy a template or install a new server from scratch?"

if ($deploytype -eq 1) { Copy-TemplateServer }

elseif ($deploytype -eq 2) { Create-NewServer }

else { Write-Host "Not a valid option" }

Month: September 2012

Techtip: Change name using Powershell

Change LastWriteTime (Date Modified) on files

Autodeploy one or more servers without System Center