Clear VSAN partitions with PowerCLI

[AntonVZhbankov]

Common task for R&D Lab. I have moderately large VSAN cluster with large number of disks previously participated in VSAN.
vCenter task "Erase all partitions" fails
The only way to clean is to ssh to all ESXi hosts and "esxcli vsan strorage remove"

Current status: I can get all GroupUUID by host and generate .sh files for each host with corresponding "esxcli vsan storage remove --uuid 521a2882-0d7f-ef06-a117-d436718c6248"

It makes life easier, but still a lot of manual work for 10+ hosts cluster.

Get-ESXCli provides vsan.storage abstraction with remove method, but with unclear documentation and no examples.

Please point me to right direction - how can I clear VSAN partitions 100% automated?

[LucD]

When you use the V2 switch, help is available

$esxcli = Get-EsxCli -VMHost <MyEsx> -V2
$esxcli.vsan.storage.remove.Help()

You can create the hash table, fill in the required parameter, and then Invoke the method.

$remVSAN = $esxcli.vsan.storage.remove.CreateArgs()
$remVSAN['uuid'] = <a groupUuid>
$esxcli.vsan.storage.remove.Invoke($remVSAN)

You can loop over all ESXi nodes and then all UUIDs

[AntonVZhbankov]

Great help, may thanks.

Working code for reference:

foreach ($vmhost in $vmhosts) {
  $esxcli = Get-EsxCli -VMHost $vmhost -V2

  [String[]]$diskGroups = @()

  $diskgroups += $esxcli.vsan.storage.list.Invoke() | findstr "pUUID"
  [String[]]$uniqueDiskGroups = $diskGroups | Sort-Object -Unique

  Write-Host 'Processing host' $vmhost.Name
  Write-Host ' - Disk groups found '

  $uniqueDiskGroups

  Write-Host ' -'

  foreach ($groupUUID in $uniqueDiskGroups) {
    $UUID = $groupUUID.Substring(31, 36)
    Write-Host 'Removing '$UUID
    $remVSAN = $esxcli.vsan.storage.remove.CreateArgs.Invoke()
    $remVSAN.uuid = $UUID;
    $esxcli.vsan.storage.remove.Invoke($remVSAN)
  }

  Write-Host ' -'
  Write-Host ' '
}

[LucD]

I think you have a typo in 1 line.
This

$remVSAN = $esxcli.vsan.storage.remove.CreateArgs.Invoke()

should be

$remVSAN = $esxcli.vsan.storage.remove.CreateArgs()

[AntonVZhbankov]

Well, it worked with .Invoke()

 

[LucD]

Strange, that seems to work indeed.
One learns something new every day 

[vCop2]

Hello guys, 

I am trying to delete old vSAN OSA partition using your script above. But get this error:

Following vSAN disk groups found : 
VSANDiskGroupUUID            : 52832df6-2448-1288-ee80-7471a45e3d22
VSANDiskGroupUUID            : 52dadad5-6ad4-a3ae-b904-c2ca57af05bb
Start removing disk groups with UUID: 52832df6-2448-1288-ee80-7471a45e3d22  ?
Press Enter to continue...:
Unable to remove device: Disk mapping is not mounted on this host: t10.NVMe____Micron_7450_MTFDKCB3T2TFS_______________031D8A480175A000
At \GIT\vcf\Host\Clear-vSAN-Partitions-on-ESX.ps1:28 char:5
+     $esxcli.vsan.storage.remove.Invoke($remVSAN)
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (:) [], ViError
    + FullyQualifiedErrorId : VMware.VimAutomation.Sdk.Types.V1.ErrorHandling.VimException.ViError

I have tried to do it directly on host:

[root@en02-esx014:~] esxcli vsan storage remove -s t10.NVMe____Micron_7450_MTFDKCB3T2TFS_______________B3AD20420175A000
Unable to remove device: Disk mapping is not mounted on this host: t10.NVMe____Micron_7450_MTFDKCB3T2TFS_______________B3AD20420175A000

[root@en02-esx:~] esxcli vsan storage automode set --enabled false
[root@en02-esx:~] esxcli vsan storage diskgroup mount -s t10.NVMe____Micron_7450_MTFDKCB3T2TFS_______________B3AD20420175A000
Unable to mount: Failed to load dek for encrypted disk on encryption off host

Is the ecryption on vSAN the reason for this issue?

Do you have any hints for me?

Thank you in advance!

Regards, 

Cop

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[vCop2]

Update:

Finally for me, is the easiest way to delete vSAN disk groups BEFORE the esx host will be removed from the cluster.

If it was not correctly completed, I use SSH and kill vSAN partitions for my MICRON NVMEs so:

1) Check your SSDs: 

vdq -qH | egrep -o -B2 'Ineligible' | grep 'Name:' | grep 'Micron_7450'

2) Kill vSAN partition #2:

for x in $(vdq -qH | egrep -o -B2 'Ineligible' | grep 'Name:' | grep 'Micron_7450' | awk '{print $NF}'); do partedUtil delete /vmfs/devices/disks/$x 2; done

3) Kill vSAN partition #1:

for x in $(vdq -qH | egrep -o -B2 'Ineligible' | grep 'Name:' | grep 'Micron_7450' | awk '{print $NF}'); do partedUtil delete /vmfs/devices/disks/$x 1; done

Maybe it helps someone...

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