New-HVPool: Errors when source JSON file has null values for maxNumberOfMonitors and maxResolutionOfAnyOneMonitor

[chriskoch99]

Scenario: Exporting pool settings from a desktop pool in one pod, for use in creating a replica pool in another pod.

Source pool is Automated, Instant Clone, Blast protocol only. No PCoIP.

Exported JSON file has the following:

 "PcoipDisplaySettings":  {
                                                                                         "Renderer3D":  "MANAGE_BY_VSPHERE_CLIENT",
                                                                                         "EnableGRIDvGPUs":  false,
                                                                                         "VGPUGridProfile":  null,
                                                                                         "VRamSizeMB":  null,
                                                                                         "VRamSizeKB":  null,
                                                                                         "MaxNumberOfMonitors":  null,
                                                                                         "MaxResolutionOfAnyOneMonitor":  null
                                                                                     }

Using New-HVPool with the JSON file as input for the -spec option, I get the following:

The variable cannot be validated because the value 0 is not a valid value for the maxNumberOfMonitors variable.
At C:\Users\chriskoch99\Documents\WindowsPowerShell\Modules\VMware.Hv.Helper\VMware.HV.Helper.psm1:4536 char:17
+ ...             $maxNumberOfMonitors = $jsonObject.DesktopSettings.displa ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : MetadataError: (:) [], ValidationMetadataException
    + FullyQualifiedErrorId : ValidateSetFailure

The variable cannot be validated because the value  is not a valid value for the maxResolutionOfAnyOneMonitor variable.
At C:\Users\chriskoch99\Documents\WindowsPowerShell\Modules\VMware.Hv.Helper\VMware.HV.Helper.psm1:4537 char:17
+ ...             $maxResolutionOfAnyOneMonitor = $jsonObject.DesktopSettin ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : MetadataError: (:) [], ValidationMetadataException
    + FullyQualifiedErrorId : ValidateSetFailure

This is because null values are not included in the ValidateSet for the $maxNumberOfMonitors and $maxResolutionOfAnyOneMonitor variables as defined at the beginning of the script, and the if ($null -ne $jsonObject.DesktopSettings.displayProtocolSettings.pcoipDisplaySettings) section doesn't code around the possibility of null values for Blast-only pools.

To resolve this, I have modified the following:

                $maxNumberOfMonitors = $jsonObject.DesktopSettings.displayProtocolSettings.pcoipDisplaySettings.maxNumberOfMonitors
                $maxResolutionOfAnyOneMonitor = $jsonObject.DesktopSettings.displayProtocolSettings.pcoipDisplaySettings.maxResolutionOfAnyOneMonitor

to the following:

                If ($jsonObject.DesktopSettings.displayProtocolSettings.pcoipDisplaySettings.maxNumberOfMonitors) {
                 $maxNumberOfMonitors = $jsonObject.DesktopSettings.displayProtocolSettings.pcoipDisplaySettings.maxNumberOfMonitors
                }
                If ($jsonObject.DesktopSettings.displayProtocolSettings.pcoipDisplaySettings.maxResolutionOfAnyOneMonitor) {
                 $maxResolutionOfAnyOneMonitor = $jsonObject.DesktopSettings.displayProtocolSettings.pcoipDisplaySettings.maxResolutionOfAnyOneMonitor
                }

This seems to work. For Blast only pools, the values of these settings when you export them will generally be null, and the function should allow for this.

Thoughts?

[get-calvus]

Hey Chris, I have the same error, but with the MaxResolutionOfAnyOneMonitor setting as well. My question is, where exactly did you put in your fix? In the json or in the ps1?

[chriskoch99]

This was a direct edit to the New-HVPool function in VMware.HV.Helper.psm1. See my last two code blocks above for the specific change. Should be able to search for the original lines in VMware.HV.Helper.psm1 to find the spot.

[get-calvus]

Thanks! I'll give that a try.