topic Re: Disable Delayed ack on all ESXi hosts in a cluster. in VMware PowerCLI Discussions

Disable Delayed ack on all ESXi hosts in a cluster.

BBB36 — Wed, 05 Jun 2019 18:08:40 GMT

Hi guys. I'm trying to get this modified script to disable "delayed ack" on every esxi host in a cluster. With the original script, it only targets specific esxi hosts instead and it runs just fine. When it runs this way (i.e. specifying the cluster so it iterates through the hosts one at a time), it fails on the first host it attempts to process. The error message has been provided below. Could someone tell me why it's not working and / or help fix it?

=================Error Message============

Exception calling "UpdateInternetScsiAdvancedOptions" with "3" argument(s): "The object or item referred to could not be found."

At line:52 char:1

+ $HostStorageSystem.UpdateInternetScsiAdvancedOptions($HostiSCSISoftwa ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException

+ FullyQualifiedErrorId : VimException

=================Script====================

param (

[parameter(Mandatory=$true

,HelpMessage="VC Name")]

[string] $VC

,[parameter(Mandatory=$true

,HelpMessage="Cluster Name")]

[string] $cluster

)

$svr=$null;

$svr = Connect-VIServer -Server $VC;

if ($svr -eq $null)

{

$sMsg = "Unable to connect to VC " + $VC;

exit 1;

}

$sMsg = "Getting cluster " + $cluster +" on VC " + $VC;

Write-Host $sMsg;

$oClstr=$null;

$oClstr = Get-Cluster -Server:$svr -Name $cluster;

if ($oClstr -eq $null)

{

$sMsg="Unable to find cluster " +$cluster + " on VC " + $VC;

$iret1 = Disconnect-VIServer -Server:$svr -Confirm:$false -ErrorAction:SilentlyContinue;

exit 1;

}

$sMsg ="Getting hosts on cluster " + $cluster + " on VC " + $VC;

write-host $sMsg;

$hosts = Get-VMHost -Location $oClstr -Server:$svr;

foreach($item in $hosts)

{

$sMsg = "Processing host " + $item.Name + " in cluster " +$cluster + " on VC " +$VC;

write-host $sMsg;

}

$HostView = Get-VMHost $hosts | Get-View

$HostStorageSystemID = $HostView.configmanager.StorageSystem

$HostiSCSISoftwareAdapterHBAID = ($HostView.config.storagedevice.HostBusAdapter | where {$_.Model -match "iSCSI Software"}).device

$options = New-Object VMWare.Vim.HostInternetScsiHbaParamValue[] (1)

$options[0] = New-Object VMware.Vim.HostInternetScsiHbaParamValue

$options[0].key = "DelayedAck"

$options[0].value = $false

$HostStorageSystem = Get-View -ID $HostStorageSystemID

$HostStorageSystem.UpdateInternetScsiAdvancedOptions($HostiSCSISoftwareAdapterHBAID, $null, $options)

Re: Disable Delayed ack on all ESXi hosts in a cluster.

LucD — Wed, 05 Jun 2019 18:38:30 GMT

Your foreach loop does not include the method call.
You should use $item (a single ESXi node) and not $hosts (all ESXi nodes in the cluster) inside the foreach loop.

Try like this

param (

[parameter(Mandatory = $true

, HelpMessage = "VC Name")]

[string] $VC

, [parameter(Mandatory = $true

, HelpMessage = "Cluster Name")]

[string] $cluster

)

$svr = $null;

$svr = Connect-VIServer -Server $VC;

if ($svr -eq $null) {

$sMsg = "Unable to connect to VC " + $VC;

exit 1;

}

$sMsg = "Getting cluster " + $cluster + " on VC " + $VC;

Write-Host $sMsg;

$oClstr = $null;

$oClstr = Get-Cluster -Server:$svr -Name $cluster;

if ($oClstr -eq $null) {

$sMsg = "Unable to find cluster " + $cluster + " on VC " + $VC;

$iret1 = Disconnect-VIServer -Server:$svr -Confirm:$false -ErrorAction:SilentlyContinue;

exit 1;

}

$sMsg = "Getting hosts on cluster " + $cluster + " on VC " + $VC;

write-host $sMsg;

$options = New-Object VMWare.Vim.HostInternetScsiHbaParamValue[] (1)

$options[0] = New-Object VMware.Vim.HostInternetScsiHbaParamValue

$options[0].key = "DelayedAck"

$options[0].value = $false

$hosts = Get-VMHost -Location $oClstr -Server:$svr;

foreach ($item in $hosts) {

$sMsg = "Processing host " + $item.Name + " in cluster " + $cluster + " on VC " + $VC;

write-host $sMsg;

$HostStorageSystemID = $item.EXtensionData.configmanager.StorageSystem

$HostiSCSISoftwareAdapterHBAID = ($item.EXtensionData.config.storagedevice.HostBusAdapter |

where { $_.Model -match "iSCSI Software" }).device

$HostStorageSystem = Get-View -ID $HostStorageSystemID

$HostStorageSystem.UpdateInternetScsiAdvancedOptions($HostiSCSISoftwareAdapterHBAID, $null, $options)

}

Re: Disable Delayed ack on all ESXi hosts in a cluster.

BBB36 — Wed, 05 Jun 2019 20:29:01 GMT

LucD. As always, works like a charm! Thank you so much!

Re: Disable Delayed ack on all ESXi hosts in a cluster.

BBB36 — Mon, 10 Jun 2019 17:59:49 GMT

Hi LucD. I have a quick follow up question if you can. Is there a way to update the host profile using PowerCLI after delayed ack has been disabled on the hosts?

And would it make sense to combine both scripts or have them separate?

Re: Disable Delayed ack on all ESXi hosts in a cluster.

LucD — Mon, 10 Jun 2019 18:12:38 GMT

You should be able to update the HostProfile with the Set-VMHostProfile cmdlet, and reference an ESXi node for which you just changed the delayed ack.
Note that all other properties in the HostProfile will also be overwritten by the current settings of that ESXi node.

Re: Disable Delayed ack on all ESXi hosts in a cluster.

BBB36 — Mon, 10 Jun 2019 19:25:58 GMT

Yep. Good point. Thanks again.

Re: Disable Delayed ack on all ESXi hosts in a cluster.

BBB36 — Mon, 10 Jun 2019 22:15:55 GMT

Sorry one last question. I was able to achieve updating the profile from reference host OK using this:

**************************************************************************

$Profile = Get-VMHostProfile

$Spec = New-Object VMware.Vim.HostProfileHostBasedConfigSpec

$Spec.Host = New-Object VMware.Vim.ManagedObjectReference

$Spec.Host = $Profile.ReferenceHost.ExtensionData.MoRef

$Spec.useHostProfileEngine = $true

$Profile.ExtensionData.UpdateHostProfile($Spec)

**************************************************************************

But is there a way to have only the changed setting to be overwritten?

Re: Disable Delayed ack on all ESXi hosts in a cluster.

LucD — Tue, 11 Jun 2019 06:13:46 GMT

Not with a cmdlet I'm afraid.

You could fall back to using the API method UpdateHostProfile, but the problem might be that the layout of the object you need to update is not documented.
It will require some reverse engineering.

Similar to what I did in Change The Root Password In Hosts And Host Profiles

Re: Disable Delayed ack on all ESXi hosts in a cluster.

BBB36 — Tue, 11 Jun 2019 21:19:47 GMT

OK. Again, appreciate all your help. Thank you.