A VM-VM anti-affinity policy describes a relationship among a category of VMs.
A VM-VM anti-affinity policy discourages placement of virtual machines in the same category on the same host. This kind of policy can be useful when you want to place virtual machines running critical workloads on separate hosts, so that the failure of one host does not affect other VMs in the category. After the policy is created, the placement engine in your SDDC attempts to deploy VMs in the category on separate hosts.
Enforcement of a VM-VM anti-affinity policy can be affected in several ways:
- If the policy applies to more VMs than there are hosts in the SDDC, or if it's not possible to place a VM on a host that satisfies the policy, DRS attempts to place the VM on any suitable host.
- If a provisioning operation specifies a destination host, that specification is always honored even if it violates the policy. DRS will try to move the VM to a compliant host in a subsequent remediation cycle.
Prerequisites
This operation is restricted to users who have the CloudAdmin role.