Create VM-VM Affinity Rules for MSCS Virtual Machines

For MSCS virtual machines in a cluster, you must create VM-VM affinity or anti-affinity rules. VM-VM affinity rules specify which virtual machines should be kept together on the same host (for example, a cluster of MSCS virtual machines on one physical host). VM-VM anti-affinity rules specify which virtual machines should be kept apart on different physical hosts (for example, a cluster of MSCS virtual machines across physical hosts).

For a cluster of virtual machines on one physical host, use affinity rules. For a cluster of virtual machines across physical hosts, use anti-affinity rules.

Note: vMotion is supported only for a cluster of virtual machines across physical hosts with pass-through RDMs. For a cluster of virtual machines on one physical host and a cluster of virtual machines across physical hosts with non-pass-through RDMs, vMotion is not supported.

Procedure

1. Browse to the cluster in the vSphere Client.
2. Click Configure.
3. Under Configuration, click VM/Host Rules.
4. Click Add.
5. In the Create VM/Host Rule dialog box, type a name for the rule.
6. From the Type drop-down menu, select a rule.
   • For a cluster of virtual machines on one physical host, select Keep Virtual Machines Together.
   • For a cluster of virtual machines across physical hosts, select Separate Virtual Machines.
7. Click Add.
8. Select the two virtual machines to which the rule applies and click OK.
9. Click OK.