Failover Cluster

Question

Hi Experts,

We have subnet 10.X.X.X / 24.

We have three servers (nodes) running Microsoft Windows Server 2012 R Standard with Failover Cluster and Hyper-V now as a requirement we need to isolate node 1 from two servers on the basis of storage and different VLAN.

in my understanding I can not isolate node 1 with out breaking the existing cluster as the requirement of the cluster is to run all machines on the same subnet (Different VLAN is a requirement)

Answer 1

For the isolation to be approved we are looking to see that there is a disk (or LUN) in the SAN storage device that can be accessed only by the HS23 server that’s running Virtual Machine 01 and Virtual Machine 02, and not by the other two blades as well. Also the HS23 machine running Virtual Machine 01 and Virtual Machine 02 needs to be on a separate VLAN.

According to your description, I suggest you configure a separate disk only connect to HS23 server, then create VM01 and VM02 on the Hyper V server manager on HS23 and store on the separate disk, Not add the VM01 and VM02 to the cluster.

Clustered VMs should store in shared storage, if not, they are unable to failover between cluster nodes. So, if you want to isolate the VM in standalone storage, there's no meaning to add the VM to be clustered.

Thanks for your time!
Best Regards,
Anne

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Answer 2

below is the existing configuration

Answer 3

Hi，

May I know why you would like to isolate node 1? Are you deploying multiple sites' cluster?

If you are deploying multiple site cluster, that node 1 in another site for Disaster recovery, you may put node 1 in another VLAN and use another storage. Then, configure storage replica between primary storage server and DR site storage.

You may refer to stretch cluster deployment:

https://learn.microsoft.com/en-us/windows-server/storage/storage-replica/stretch-cluster-replication-using-shared-storage

If you are not talking about the multisite cluster, then, all cluster nodes should have network connection with each other and connect to the same shared storage.

Thanks for your time!
Best Regards,
Anne

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Answer 4

Due to license requirements, we have to isolate VM with respect to HOST, STORAGE, and VLAN.

As we are currently running a cluster with three nodes with single storage (LUN-1 (RAID1+0) Cluster Disk1) and LUN-2 (RAID5) Cluster Disk3)

Answer 5

Not sure what sort of licensing requirements would require you to isolate a VM with respect to host, storage, and VLAN, but if the license requires it, you will have move the VM to a stand-alone host. There are ways within a cluster to accomplish storage and VLAN isolation of the VM, but not of the host. Besides, if you want to isolate to a single node in the cluster, there is no need for the VM to be in a cluster. If you isolate to a single node of the cluster, you no longer have shared resources or high availability.