Notes from System Center Battlefield: Monitoring Guest Clusters with SCOM

Article, Cluster, Hyper-V, Microsoft, Network, Software, System Center, System Center Operations Manager, Windows, Windows Servers 2012 R2 1 Minute

So what is guest cluster? A guest cluster is when you create cluster inside of virtual machines. In the past we’ve done that trough ISCSI or FC and lately with Shared VHDX in Windows Server 2012 R2. And like any other cluster you will want to monitor these clusters with SCOM but as they are just like any other cluster where is the catch? The catch is from time to time these guest clusters will be live migrated to different hosts and sometimes the cluster can sense these live migrations and raise some alerts which of course will show in SCOM. Not that the live migration of virtual machine is something bad just clusters are very sensitive on network side. There is a resolution to this and it is all described here. Basically you need to execute the following commands to increase the threshold of the cluster heartbeat:

Get-Cluster | fl *subnet*
(Get-Cluster).CrossSubnetThreshold = 20
(Get-Cluster).SameSubnetThreshold = 20
Get-Cluster | fl *subnet*

 

So if you have guest clusters and SCOM definitely change that settings on the guest clusters.

Published by Stanislav Zhelyazkov

Stanislav Zhelyazkov has been working in IT since 2007. Stanislav has started his IT career as a Help Desk Specialist in 2007 while studying Informatics in the University of Ruse. He also worked in HP Enterprise Services (now known as DXC), maintaining large corporate IT infrastructures for clients in Holland, Switzerland and Germany and was involved in a Private Cloud project based on MS Hyper-V and System Center. He was also in the role of Principal Consultant in Lumagate developing and consulting companies on Azure, OMS, management and Private clouds. Currently he is Cloud Infrastructure Engineer at Sentia Denmark. Stanislav is active community member at MSDN forums providing answers on Azure. His blogposts can be found at www.cloudadministrator.net or www.systemcentercentral.com.

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2 thoughts on “Notes from System Center Battlefield: Monitoring Guest Clusters with SCOM”

  1. Pingback: Microsoft Most Valuable Professional (MVP) – Best Posts of the Week around Windows Server, Exchange, SystemCenter and more – #64 - Dell TechCenter - TechCenter - Dell Community
  2. Pingback: Microsoft Most Valuable Professional (MVP) – Best Posts of the Week around Windows Server, Exchange, SystemCenter and more – #64 - Windows Management - TechCenter - Dell Community

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