Get-snapshot and the condition if

[IKirill]

Hi gurus!

Please help

I get all tree of snapshots:

get-snapshot myvm

Name                 Description                    PowerState

----                 -----------                    ----------

SNAP00          No Desc          PoweredOff

SNAP00          No Desc          PoweredOff

SNAP00          No Desc          PoweredOff

In this case all names are identical!

So the condition:

If all names in snapshots tree are identical - delete all snapshot!

If not - do nothing.

[LucD · Accepted solution]

You could do something like this.
If you also want to delete the snapshot when there are more than 3, change the -eq to -ge

Get-VM | Get-Snapshot |

Group-Object -Property {$_.VM.Name},Name -PipelineVariable group |

ForEach-Object -Process {

    if($group.Group.Count -eq 3){

        $vmName,$snapName = $group.Name.Split(',').Trim(' ')

        Get-VM -Name $vmName | Get-Snapshot -Name $snapName |

        Remove-Snapshot -Confirm:$false

    }

}

[IKirill]

Thanks LUCD!

[IKirill]

LucD!

I tested the script and came to the conclusion that all VM snapshots are being deleted, even if they have a different name.

Question 1: how can I modify the script so that it deletes all snapshots only if they have the same name?

Question 2, how can I specify a variable to the script so that the operator enters the snapshot name (it is obviously the same in the snapshot tree)

[LucD]

Did you assign a value to the variable $snapName?

You could do a Read-Host to let the operator assign a value.

[IKirill]

Try like this, but not working

Get snaps, names are identical

C:\> Get-VM 17-RDP | Get-Snapshot
Name                 Description                    PowerState    
----                 -----------                    ----------    
va1                                                 PoweredOff    
va1                                                 PoweredOff    

Get-VM 17-RDP | Get-Snapshot |
Group-Object -Property {$_.VM.Name},Name -PipelineVariable group
ForEach-Object -Process {
$snapName = "va1"
    if($group.Group.Count -ge 1){
        $vmName,$snapName = $group.Name.Split(',').Trim(' ')
        Get-VM -Name $vmName | Get-Snapshot -Name $snapName |
        Remove-Snapshot -Confirm:$false
            }
}

[LucD]

You don't have a pipeline symbol (|) at the end of the line with Group-Object.

[IKirill]

Ok! my mistake!

But again, all snapshots are deleted, even if the names are different. I think that the problem is in the condition, because here only the number of snapshots in the group is considered ($group.Group.Count -ge 1), but their names are not compared!

Get-VM 17-RDP | Get-Snapshot | 
Group-Object -Property {$_.VM.Name},Name -PipelineVariable group  |
ForEach-Object -Process { 
$snapName = "va1" 
if($group.Group.Count -ge 1){ 
$vmName,$snapName = $group.Name.Split(',').Trim(' ') 
Get-VM -Name $vmName | Get-Snapshot -Name $snapName | 
Remove-Snapshot -Confirm:$false 
} 
}

[LucD]

You will have to define a name for the target snapshot in that case.

Something like this.

Note that will remove the snapshot with that name, even if there is only 1 snapshot.

$tgtSnapName = 'va1'

Get-VM -Name 17-RDP | Get-Snapshot |

Group-Object -Property {$_.VM.Name},Name -PipelineVariable group |

ForEach-Object -Process {

    if($group.Group.Count -ge 1){

        $vmName,$snapName = $group.Name.Split(',').Trim(' ')

        if($snapName -eq $tgtSnapName){

            Get-VM -Name $vmName | Get-Snapshot -Name $snapName |

            Remove-Snapshot -Confirm:$false

        }

    }

}