The vsphere_compute_cluster_vm_affinity_rule resource can be used to manage VM affinity rules in a cluster, either created by the vsphere_compute_cluster resource or looked up by the vsphere_compute_cluster data source.

This rule can be used to tell a set to virtual machines to run together on a single host within a cluster. When configured, DRS will make a best effort to ensure that the virtual machines run on the same host, or prevent any operation that would keep that from happening, depending on the value of the mandatory flag.

Example Usage

The example below creates two virtual machines in a cluster using the vsphere_virtual_machine resource, creating the virtual machines in the cluster looked up by the vsphere_compute_cluster data source. It then creates an affinity rule for these two virtual machines, ensuring they will run on the same host whenever possible.

data "vsphere_datacenter" "dc" {
  name = "dc1"

data "vsphere_datastore" "datastore" {
  name          = "datastore1"
  datacenter_id = "${data.vsphere_datacenter.dc.id}"

data "vsphere_compute_cluster" "cluster" {
  name          = "cluster1"
  datacenter_id = "${data.vsphere_datacenter.dc.id}"

data "vsphere_network" "network" {
  name          = "network1"
  datacenter_id = "${data.vsphere_datacenter.dc.id}"

resource "vsphere_virtual_machine" "vm" {
  count            = 2
  name             = "terraform-test-${count.index}"
  resource_pool_id = "${data.vsphere_compute_cluster.cluster.resource_pool_id}"
  datastore_id     = "${data.vsphere_datastore.datastore.id}"

  num_cpus = 2
  memory   = 2048
  guest_id = "other3xLinux64Guest"

  network_interface {
    network_id = "${data.vsphere_network.network.id}"

  disk {
    label = "disk0"
    size  = 20

resource "vsphere_compute_cluster_vm_affinity_rule" "cluster_vm_affinity_rule" {
  name                = "terraform-test-cluster-vm-affinity-rule"
  compute_cluster_id  = "${data.vsphere_compute_cluster.cluster.id}"
  virtual_machine_ids = ["${vsphere_virtual_machine.vm.*.id}"]

Argument Reference

The following arguments are supported:

  • compute_cluster_id - (Required) The managed object reference ID of the cluster to put the group in. Forces a new resource if changed.

  • name - (Required) The name of the rule. This must be unique in the cluster.

  • virtual_machine_ids - (Required) The UUIDs of the virtual machines to run on the same host together.

  • enabled - (Optional) Enable this rule in the cluster. Default: true.

  • mandatory - (Optional) When this value is true, prevents any virtual machine operations that may violate this rule. Default: false.

Attribute Reference

The only attribute this resource exports is the id of the resource, which is a combination of the managed object reference ID of the cluster, and the rule's key within the cluster configuration.


An existing rule can be imported into this resource by supplying both the path to the cluster, and the name the rule. If the name or cluster is not found, or if the rule is of a different type, an error will be returned. An example is below:

terraform import vsphere_compute_cluster_vm_affinity_rule.cluster_vm_affinity_rule \
  '{"compute_cluster_path": "/dc1/host/cluster1", \
  "name": "terraform-test-cluster-vm-affinity-rule"}'