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Windows failover cluster on VMware 5.5

Posted on 2015-01-14
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Last Modified: 2015-02-18
I am on a VMware 5.5 environment and I want to create a Windows Failover Cluster with 2 nodes. I do not want both nodes on the same physical host (cluster-in-a-box) so I am looking for Cluster-across-box configuration. However I would also like the nodes to vMotion should their host dies. Is there a cluster-across-box config that supports vMotion? If yes, do I need to use Pass-Through RDM (physical compatibility mode) or Non-pass-through RDM (virtual compatibility mode)? Thanks.
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Question by:criskrit
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Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
ID: 40549998
Just a quick point, vMotion is not used when a host dies, VMware HA is used, which just restarts the VM, on other available hosts, when a host has an uncontrolled shutdown e.g. host crashes, dies, fails etc

VMware recommends physical compatibility mode.

You will need to use RDM for all Microsoft Failover Clustering.

See pages

Pg15 - Cluster Virtual Machines Across Physical Hosts

and

Pg22 -  Use MSCS in an vSphere HA and vSphere DRS Environment

see the Failover Clustering Bible
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by:criskrit
ID: 40550010
Hello Andrew and thank for the reply. Yes, VMware HA is what I meant. Does physical compatibility mode support VMware HA? Or is the VM "tied" to the host?
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LVL 118
ID: 40550024
VMware HA is supported, VMs are not tied to a host, and you would want to setup Anti-Affinity Rules, see Page 22 of the Guide, to ensure VMs are on different Hosts, if you have DRS.

you can see the supported matrix here

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1037959
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Author Comment

by:criskrit
ID: 40550034
Okay thanks. I have been interpreting "pass-through RDM" as a pass-through SCSI connection and in this case the VM is tied to the corresponding host. I suppose this is what has been causing my confusion. :-)
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LVL 118
ID: 40550195
It's pass through iSCSI or FC connection to shared storage!
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Author Comment

by:criskrit
ID: 40558037
Okay, let me try these and I will report back. Thanks! :-)
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LVL 118
ID: 40558276
Okay, no problems.
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