Set Memory Reservation & Limit For List Of VMs

[cbaptiste]

Can someone help me write a script on how to set the memory reservation and limit for a list of VMs from a text file. My lab is down right so I can't test my script to see if it works but i desperately need to make the change in production. I would be glad if anyone can tell me if they see anything wrong with it or any advice or input. Thanks

Get-Content -Path C:\tmp\VMList.txt | ForEach-Object {
  Get-VM -Name  $_ | `
  Get-VMResourceConfiguration | `
  Set-VMResourceConfiguration -MemReservationMB 1024 -MemLimitMB 2048
}

VMList.txt

vm1

vm2

vm3

vm4

vm5

[LucD]

That looks good.

Add the WhatIf switch on the Set-VMResourceConfiguration cmdlet, that way you can see what will happen.

And btw, you don't have to add the back-tick when the line ends with the pipeline symbol.

[fabiendibot]

If i may..

Your script looks good, and to push it a little you could do something like this

Get-Content C:\tmp\VMList.txt | Get-VM -Name  $_ | Get-VMResourceConfiguration | Set-VMResourceConfiguration -MemReservationMB 1024 -MemLimitMB 2048

The Foreach isnt needed because Get-Content send an array object to the pipeline (like foreach )

[cbaptiste]

If i remove the foreach i get an error message (See below). My script seems to work fine. I tried it on 5 vms this morning.

Get-VM : Cannot validate argument on parameter 'Name'. The argument is null or

empty. Supply an argument that is not null or empty and then try the command ag

ain.

At C:\Users\baptisec_pc\Desktop\VDI\PowerCLI Scripts\VMMemory2.ps1:2 char:13

+ Get-VM -Name <<<<   $_ |

    + CategoryInfo          : InvalidData: (:) [Get-VM], ParameterBindingValid

   ationException

    + FullyQualifiedErrorId : ParameterArgumentValidationError,VMware.VimAutom

   ation.ViCore.Cmdlets.Commands.GetVM

[LucD]

That is a known issue with passing strings through the pipeline and OBN.

Try like this

Get-VM -Name (Get-Content C:\tmp\VMList.txt) | Get-VMResourceConfiguration | Set-VMResourceConfiguration -MemReservationMB 1024 -MemLimitMB 2048

The difference is that you now pass an array of names on the Name parameter of the Get-VM

[cbaptiste]

It works. Unlike my script, it randomly select a name from the list.Still works. Thanks.

PowerCLI C:\Users\baptisec_pc\Desktop\VDI\PowerCLI Scripts> .\VMMemory3.ps1

VM                   NumCpuShares    CpuSharesLevel  NumMemShares    MemSharesLevel

--                          ------------       --------------      ------------        ----------

W7-VPC_E189      1000            Normal          30720           Normal

W7-VPC_E187      1000            Normal          30720           Normal

W7-VPC_E185      1000            Normal          30720           Normal

W7-VPC_E188      1000            Normal          30720           Normal

W7-VPC_E186      1000            Normal          30720           Normal