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how can I test get-wmiobject

Hello,

How can I modify this code for testing a wmi query without having the following error :
Get-WmiObject : Invalid namespace
At line:3 char:23
+ $cluster=get-wmiobject <<<< -class "MSCluster_Cluster" -namespace "root\mscluster" -computername "$mach_name" | select -ExpandProperty Name
+ CategoryInfo : InvalidOperation: (:) [Get-WmiObject], ManagementException
+ FullyQualifiedErrorId : GetWMIManagementException,Microsoft.PowerShell.Commands.GetWmiObjectCommand

The query :

try
{
$cluster=get-wmiobject -class "MSCluster_Cluster" -namespace "root\mscluster" -computername "$mach_name" | select -ExpandProperty Name    
}
catch [Exception]
{ 
    echo "$cluster" | out-file $LOG_FILE -ErrorVariable ERR1 -encoding "default" -append -ErrorAction silentlycontinue 
}

Open in new window

Thanks
bibi

bibi92Asked: 2013-01-04

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LVL 40

SubsunCommented: 2013-01-04

The exception thrown is not caught by the Try/Catch, since it is not a "terminating error". You can tell tell PowerShell to treat it as a terminating error by adding -ErrorAction Stop
Try this..

try
{
$cluster=get-wmiobject -class "MSCluster_Cluster" -namespace "root\mscluster" -computername "$mach_name" -ErrorAction Stop | select -ExpandProperty Name    
}
catch [Exception]
{ 
    echo "$cluster" | out-file $LOG_FILE -ErrorVariable ERR1 -encoding "default" -append -ErrorAction silentlycontinue 
}

Open in new window

Also you may have to write a custom error message in Catch section as the Var $cluster will be null if there is an exception..

LVL 37

Neil RussellTechnical Development LeadCommented: 2013-01-04

The namespace should be....

-namespace "root\cluster"

LVL 37

Neil RussellTechnical Development LeadCommented: 2013-01-04

P.S.

If this is in a windows server 2008 R2 environment, use directly the Powershell cluster cmdletts

http://blogs.msdn.com/b/clustering/archive/2009/05/21/9633316.aspx

bibi92Author Commented: 2013-01-04

This script can be execute on windows server 2008 R2 or 2003.
Same error with -namespace "root\cluster" .

Thanks

Regards
bibi

LVL 37

Neil RussellTechnical Development LeadCommented: 2013-01-04

On a server that is part of a cluster can you run the following in powershell?

get-wmiobject -class "MSCluster_Cluster" -namespace "root\cluster"

bibi92Author Commented: 2013-01-04

Already done, I want to test if the server is a clustered or not. If I execute the script and the server is not a cluster, the error occurs :
Get-WmiObject : Invalid namespace
At line:3 char:23
+ $cluster=get-wmiobject <<<< -class "MSCluster_Cluster" -namespace "root\mscluster" -computername "$mach_name" | select -ExpandProperty Name

Thanks