Tobias: Created page with "Here is a short script to batch modify the CPU-Core count and Memory of a virtual machine using PowerCLI in a vSphere 6 environment (script adopted from the [https://code.vmwa..."

2020-06-10T09:52:36Z

Created page with "Here is a short script to batch modify the CPU-Core count and Memory of a virtual machine using PowerCLI in a vSphere 6 environment (script adopted from the [https://code.vmwa..."

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Here is a short script to batch modify the CPU-Core count and Memory of a virtual machine using PowerCLI in a vSphere 6 environment (script adopted from the [https://code.vmware.com/forums/2530/vsphere-powercli VMware PowerCLI Forums]). The script uses a list of virtual machines which are to be modified including the socket count.

Save the following script in a file with the name modifycpumem.ps1 in C:\
<syntaxhighlight lang="powershell">
Function Enable-MemHotAdd($vm){
$vmview = Get-vm $vm | Get-View
$vmConfigSpec = New-Object VMware.Vim.VirtualMachineConfigSpec

$extra = New-Object VMware.Vim.optionvalue
$extra.Key="mem.hotadd"
$extra.Value="true"
$vmConfigSpec.extraconfig += $extra

$vmview.ReconfigVM($vmConfigSpec)
}

Function Enable-vCpuHotAdd($vm){
$vmview = Get-vm $vm | Get-View
$vmConfigSpec = New-Object VMware.Vim.VirtualMachineConfigSpec

$extra = New-Object VMware.Vim.optionvalue
$extra.Key="vcpu.hotadd"
$extra.Value="true"
$vmConfigSpec.extraconfig += $extra

$vmview.ReconfigVM($vmConfigSpec)
}

$vmlist = Import-CSV C:\CPUList.csv

foreach ($item in $vmlist) {
$vmname = $item.vmname
Stop-VM -VM $vmname
}

foreach ($item in $vmlist) {

$vmname = $item.vmname
$sockets = $item.sockets
$cpus = [int]$item.sockets * [int]$item.cores
$mem = [int]$item.mem * 1024
Enable-MemHotAdd $vmname
Enable-vCpuHotAdd $vmname
Set-VM -VM $vmname -CoresPerSocket $sockets -NumCPU $cpus -MemoryMB $mem -Confirm:$false

}

foreach ($item in $vmlist) {
$vmname = $item.vmname
Start-VM -VM $vmname
}
</syntaxhighlight>

Create a csv-file with the colums vmname,sockets,cores,mem,comment and save this file with the name CPUList.csv in the C:\ folder. Modify the code for a different folder.

After that start the PowerCLI console in admin mode.

Then you need to connect to the vSphere of the VMs:

<syntaxhighlight lang="powershell">
Connect-VIServer "Server" -User user -Password pass
</syntaxhighlight>

After that you can execute the script:

<syntaxhighlight lang="powershell">
.\modifycpumem.ps1
</syntaxhighlight>

In some environment you may need to set the execution policy before to run the ps1-script:

<syntaxhighlight lang="powershell">
set-executionpolicy remotesigned
</syntaxhighlight>

Also if you get a certificate error when connecting to the vsphere you can set the certificate check to ignore:

<syntaxhighlight lang="powershell">
Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -Confirm:$false
</syntaxhighlight>

Modify Cpu and Memory vSphere - Revision history

Tobias: Created page with "Here is a short script to batch modify the CPU-Core count and Memory of a virtual machine using PowerCLI in a vSphere 6 environment (script adopted from the [https://code.vmwa..."