PowerShell for Failover Clustering: Find Clusters in a Domain

[John Marlin]

First published on MSDN on Aug 12, 2010

Hi Cluster Fans,

Using PowerShell in Windows Server 2008 R2 Failover Clustering we have made it very easy to find all the clusters within a domain.

You may already know that you can use the Get-Cluster CMDlet to get information about the current cluster you are working on.  Beyond this, Get-Cluster also gives you the ability to find other clusters in your domain.

To find all the parameters, details and even examples of every CMDlet, you can run Get-Help CMDlet –Full

Let’s check out the output for the Get-Cluster parameter:

PS C:\Windows\system32> Get-Help Get-Cluster -Full

NAME

Get-Cluster

SYNOPSIS

Get information about one or more failover clusters in a given domain.

SYNTAX

Get-Cluster [-Domain <string>] [<CommonParameters>]

Get-Cluster [[-Name] <string>] [<CommonParameters>]

DESCRIPTION

This cmdlet can obtain a variety of configuration and state information about a failover cluster, including the following items:

- State information about whether a backup is in progress.

- State information about whether the cluster is in a forced quorum state.

- Cross-network settings that are especially relevant for multi-site clusters.

To set a common property for the cluster, use this cmdlet to get the cluster object and then set the appropriate property on that cluster object directly.

PARAMETERS

-Domain <string>

Specifies the name of the domain to enumerate clusters in.

Required?                    false

Position?                    named

Default value

Accept pipeline input?       false

Accept wildcard characters?  false

-Name <string>

Specifies the name of the cluster to get.

Required?                    false

Position?                    1

Default value

Accept pipeline input?       false

Accept wildcard characters?  false

<CommonParameters>

This cmdlet supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, WarningVariable, OutBuffer and OutVariable. For more information, type, "get-help about_commonparameters".

INPUTS

OUTPUTS

Microsoft.FailoverClusters.PowerShell.Cluster

NOTES

-------------------------- EXAMPLE 1 --------------------------

C:\PS>Get-Cluster | fl *

Domain                           : contoso.com

Name                             : cluster1

FixQuorum                        : 0

SharedVolumesRoot                : C:\ClusterStorage

DefaultNetworkRole               : 2

Description                      :

QuorumArbitrationTimeMax         : 20

ClusSvcHangTimeout               : 60

ClusSvcRegroupStageTimeout       : 7

ClusSvcRegroupOpeningTimeout     : 5

ClusSvcRegroupPruningTimeout     : 5

ClusSvcRegroupTickInMilliseconds : 300

HangRecoveryAction               : 3

SameSubnetDelay                  : 1000

CrossSubnetDelay                 : 1000

SameSubnetThreshold              : 5

PlumbAllCrossSubnetRoutes        : 0

CrossSubnetThreshold             : 5

BackupInProgress                 : 0

RequestReplyTimeout              : 60

WitnessRestartInterval           : 15

SecurityLevel                    : 1

ClusterLogLevel                  : 3

ClusterLogSize                   : 100

WitnessDatabaseWriteTimeout      : 300

AddEvictDelay                    : 60

EnableSharedVolumes              : Enabled

Id                               : 655d3640-2845-4077-a396-9f317f2df60e

Description

-----------

This command displays state and property information for the local cluster in the form of a list.

-------------------------- EXAMPLE 2 --------------------------

C:\PS>Get-Cluster cluster1

Name

----

cluster1

Description

-----------

This command gets information about a cluster named cluster1.

-------------------------- EXAMPLE 3 --------------------------

C:\PS>Get-Cluster -domain contoso.com

Name

----

cluster1

cluster2

cluster3

Description

-----------

This command gets information about each of the clusters in the contoso.com domain.

-------------------------- EXAMPLE 4 --------------------------

C:\PS>$cluster = Get-Cluster; $cluster.CrossSubnetDelay = 1500

Description

-----------

This command sets the common property CrossSubnetDelay for the local cluster to 1500. Alternatively, you can run "Get-Cluster | %{ $_.CrossSubnetDelay = 1500 }" to set that property.

RELATED LINKS

Online version: http://go.microsoft.com/fwlink/?LinkId=143782

New-Cluster

Remove-Cluster

Start-Cluster

Stop-Cluster

Test-Cluster

As we can see from the third example, we already have the information we need to query all clusters in a domain!  We recommend checking out the help examples for the CMDlets if you want to figure out common operations for each.

Simply run Get-Cluster –domain MyDomain.com and you will get the list of clusters in that domain.

Don’t forget that you can also view this same help content online by using the –online switch: Get-Help Get-Cluster –online

Thanks,

Symon Perriman
Program Manager II
Clustering & High-Availability

Microsoft