I was asked recently if we were able to retrieve the disk space of a VM in vCloud Director through PowerCLI, on checking this I found that it is not currently part of the CIVM object and also there is currently no Get-HardDisk cmdlet equivalent like in the vSphere snapin.
After looking through the REST API Reference Documentation –> User Operations I found an entry for the VM VirtualHardwareSection and specifically the disks which can be found as can be seen here: GET /vApp/{id}/virtualHardwareSection/disks
The virtualhardwaresection is easily accessed via PowerCLI using the extensiondata property which allows access to the back end API, I could then find my disk properties by filtering on the description of Hard Disk as in the example below:
(Get-VM MyCloudVM).ExtensionData.getvirtualhardwaresection().Item | Where { $_.Description -like “Hard Disk”}
Now I had the hard disk I noticed that part of the information was the capacity as highlighted below:
With this information I could then find the capacity of the disk and add the information I needed into more of a friendly PowerShell property to the Hard Disk object.
So tying this all back together we could easily use the .ExtensionData reference to create our own Advanced PowerShell function to return the hard disk information for any CIVM.
Example
The following shows an example of how to use this new function and the output, this of course can also be used to export into CSV/HTML/Text or any other format PowerShell can be used with, it is also great for reporting on where the disk space in your cloud is being used!
The Code
Function Get-CIVMHardDisk {
Param (
[Parameter(Mandatory=$True,ValueFromPipeline=$True,ValueFromPipelinebyPropertyName=$True)]
$CIVM
)
Process {
$AllHDD = $CIVM.ExtensionData.getvirtualhardwaresection().Item | Where { $_.Description -like “Hard Disk”}
$HDInfo = @()
Foreach ($HD in $AllHDD) {
$HD | Add-Member -MemberType NoteProperty -Name “Capacity” -Value $HD.HostResource[0].AnyAttr[0].”#text”
$HD | Add-Member -MemberType NoteProperty -Name “VMName” -Value $CIVM.Name
$HDInfo += $HD
}
$HDInfo
}
}
