Detach Script

[itayms]

Hi,

i need a script that detach luns that contains the name vmax214 from esx servers that contains the name esxdcb.

thanks for the help.

Itay

[LucD]

You can use the Detach-Disk function from my LUN juggling in vSphere 5 post.

The driving script could look something like this

foreach($esx in (Get-VMHost | where {$_.Name -match "esxdcb"})){
  Get-ScsiLun -LunType disk | Where {$_.CanonicalName -match "vmax214"} | %{
    Detach-Disk -VMHost $esx -CanonicalName $_.CanonicalName
  }
}

[itayms]

sorry Luc but i forget that i need to unmount before the detach, there is a script that first unmount them and after detach them?

[LucD]

Are these LUNs all used in datastores ?

[itayms]

yes, all the luns are used as vmfs.

i need to unmount the datastores from all esxdcb hosts and after detach them.

i got another cluster that used these datastores they need to stay there.

[LucD]

Try something like this

foreach($esx in (Get-VMHost | where {$_.Name -match "esxdcb"})){
  $storSys = Get-View $esx.ExtensionData.ConfigManager.StorageSystem
  foreach($ds in (Get-Datastore -RelatedObject $esx | where {$_.Type -eq "VMFS"})){
    if($ds.ExtensionData.Info.Vmfs.Extent | where {$_.DiskName -match "vmax214"}){
      $storSys.UnmountVmfsVolume($ds.ExtensionData.Info.Vmfs.Uuid)
      foreach($extent in $ds.ExtensionData.Info.Vmfs.Extent){
        $lun = $storSys.StorageDeviceInfo.ScsiLun |
          where {$_.CanonicalName -eq $extent.DiskName}
        $storSys.DetachScsiLun($lun.Uuid)
      }
    }
  }
}

[itayms]

Hi Luc,

i run the script but nothing was happen.

again i will let you the parameters:

Host name include esxdcb

datastore name include vmax214

[LucD]

There was a typo in the code, I just corrected it.

Can you try again please ?

[itayms]

still nothing happen without any error

[itayms]

i don't care if will be 2 scripts, 1 for unmount and 1 for detach

[LucD]

I just tested the corrected script, and it works correctly for me.

Are you sure about the hostname (esxdcb) and diskname (vmax214) strings to look for ?

Perhaps try running this version where I added some extra output to help in debugging.

foreach($esx in (Get-VMHost | where {$_.Name -match "esxdcb"})){
  "Looking at host $($esx.Name)"
  $storSys = Get-View $esx.ExtensionData.ConfigManager.StorageSystem
  foreach($ds in (Get-Datastore -RelatedObject $esx | where {$_.Type -eq "VMFS"})){
      "Looking at $($ds.Name)"
    if($ds.ExtensionData.Info.Vmfs.Extent | where {$_.DiskName -match "vmax214"}){
      "Found a diskname match"
      $storSys.UnmountVmfsVolume($ds.ExtensionData.Info.Vmfs.Uuid)
      "Unmounted datastore"
      foreach($extent in $ds.ExtensionData.Info.Vmfs.Extent){
        $lun = $storSys.StorageDeviceInfo.ScsiLun |
          where {$_.CanonicalName -eq $extent.DiskName}
        "Detaching LUN with UUID $($lun.Uuid)"
        $storSys.DetachScsiLun($lun.Uuid)
      }
    }
  }
}

[itayms]

hi Luc,

this the output from the debug of one esx server:

Looking at host esxdcb19

Looking at voldca_vmax214_2

Looking at voldca_vmax214_3

Looking at voldca_vmax214_0

Looking at voldca_vmax214_1

Looking at voldca_vmax214_4

Looking at voldca_vmax214_5

Looking at voldca_vmax214_6

Looking at voldca_vmax214_7

Looking at voldca_vmax214_8

Looking at voldca_vmax214_9

Looking at voldca_vmax214_10

Looking at voldca_vmax214_11

Looking at voldca_vmax214_12

Looking at voldca_vmax214_13

Looking at voldca_vmax214_14

Looking at voldca_vmax214_15

Looking at voldca_vmax214_16

Looking at voldca_vmax214_17

Looking at voldca_vmax214_18

Looking at voldca_vmax214_19

after that nothing was happen

[LucD]

I have the impression the Datastore names contain the string "vmax214", not the disknames (LUN canonicalname).

Is that correct ?

[itayms]

yes the datastore names conatin a string with vmax214

[LucD]

That changes the algorithm.

Try like this

foreach($esx in (Get-VMHost | where {$_.Name -match "esxdcb"})){
  $storSys = Get-View $esx.ExtensionData.ConfigManager.StorageSystem
  foreach($ds in (Get-Datastore -RelatedObject $esx | where {$_.Type -eq "VMFS" -and $_.Name -match "vmax214"})){
    $storSys.UnmountVmfsVolume($ds.ExtensionData.Info.Vmfs.Uuid)
    foreach($extent in $ds.ExtensionData.Info.Vmfs.Extent){
      $lun = $storSys.StorageDeviceInfo.ScsiLun | where {$_.CanonicalName -eq $extent.DiskName}
      $storSys.DetachScsiLun($lun.Uuid)
    }
  }
}

[itayms]

Thanks a lot Luc!!