get-view command redirect error to logfile

[mthiha207au]

I am unable to capture error to logfile of get-view unmount luns command. Usual way to redirecting using 2>&1 | tee -append $logfile or out-file wont work.

Here is an example:

$StorageSys = Get-View $VMHost.Extensiondata.ConfigManager.StorageSystem

$storagesys.UnmountVmfsVolume($invaliduuid) 2>&1 | Tee-Object -Append $logFile

$storagesys.UnmountVmfsVolume($invaliduuid) | outfile -append $logfile    #### Prefer Tee method as i need screen output too 

any workaround?

Thanks,
Max

[LucD]

You could use a Try-Catch construct

$StorageSys = Get-View $VMHost.Extensiondata.ConfigManager.StorageSystem
try{
   $storagesys.UnmountVmfsVolume($invaliduuid)
}
catch{
   $Error[0] | Tee-Object -FilePath .\error.log -Append | Write-Error
}

The Write-Error in the Catch block is to get the error formatted as an error (in red by default)

[mthiha207au]

Thanks LucD. Try and catch works well in this case. 
I still have another problem with error redirection and will continue to discuss here. Please be patient as I am new to redirection.

Assuming $InvalidCluster is invalid. 

Get-Cluster $InvalidCluster 2>&1 | Tee-Object -FilePath .\error.log -Append  #This works fine and write error to screen and file

However, This doesnt work and I am confused. 

Get-Cluster $InvalidCluster | Remove-Cluster -confirm:$false 2>&1 | Tee-Object -FilePath .\error.log -Append #Write only to screen , not to file

Do I need Try-Catch? Its confusing why the latter is not working. 

[LucD]

That is probably due to the PowerShell stream that is used for the error message.
If you merge redirect the output to the screen, there is nothing for the Tee-Object to act upon.

In any case, with the Try-Catch you only would get to the Remove-Cluster when the Get-CLuster does not cause an exception.
I would do

try {
   Get-Cluster $InvalidCluster -ErrorAction Stop | Remove-Cluster -confirm:$false 2>&1
}
catch {
  $Error[0] | Tee-Object -FilePath .\error.log -Append
}