Microsoft KB Archive/919594

= Microsoft Operations Manager (MOM) 2005 does not detect a virtual server after you install MOM 2005 monitoring agents on a server cluster =

Article ID: 919594

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Operations Manager (MOM) 2005

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SYMPTOMS
Microsoft Operations Manager (MOM) 2005 does not detect a virtual server after you install MOM 2005 monitoring agents on a server cluster.



CAUSE
This issue occurs if the configuration requirements to install MOM monitoring agents on a server cluster are not met. To detect a virtual server, MOM requires that all the following resources are configured in a cluster group:
 * An IP Address resource
 * A Network Name resource that has a dependency on the IP Address resource
 * An application-specific resource that has a dependency on the Network Name resource

These are typical settings for most clustered programs. However, certain types of clustered resources, such as file shares, do not generally have all these items configured. You must create and configure these resources to let MOM discover and monitor the clustered resource.



RESOLUTION
To resolve this issue, configure existing resources in the cluster group so that MOM detects the virtual server, or create and configure the necessary resources. For example, you may have to create a generic application resource that does nothing. This generic application resource will enable MOM to discover the virtual server on which the resource is hosted.

Note If more than one Network Name resource is configured in a group, MOM uses the first network name that it detects as the name of the virtual server.

Important The original release version of MOM 2005 requires that each cluster node is the preferred owner of the cluster group. However, MOM 2005 Service Pack 1 (SP1) no longer requires that each cluster node is the preferred owner of the cluster group.



Overview of MOM agent cluster monitoring
The MOM agents discover virtual servers as required. When the MOM agent starts, it first connects to the Cluster service. Then, the MOM agent iterates through each cluster group to discover the virtual servers. Additionally, MOM registers to be notified when a cluster configuration changes. When a cluster configuration changes, MOM then restarts the virtual server discovery process.

The MOM agent sends the virtual servers that are discovered to the MOM server database. The virtual server then appears under the Windows Server Cluster Computers node of the MOM 2005 Administrator console.

Note To view these computers, expand Administration, expand Computers, and then click Windows Server Cluster Computers.

If you monitor the virtual server, MOM deploys any rules that have been configured for the virtual server to the MOM agent. The MOM agent then starts the heartbeat process for that particular virtual server.

For more information about how to deploy MOM agents to clustered computers, visit the following Microsoft Web site:

http://www.microsoft.com/technet/prodtechnol/mom/mom2005/Library/87d9530d-6785-44c3-8a7f-2e6dca0d9cbe.mspx

Keywords: kbclustering kbtshoot kbprb KB919594

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