fix(gke): Update DRANET defaults and gke-a4x yaml (#5835) (#5843)

Author: aslam-quad

examples/gke-a4x/gke-a4x.yaml

@@ -157,6 +157,7 @@ deployment_groups:
       enable_dcgm_monitoring: true
       enable_gcsfuse_csi: true
       enable_managed_lustre_csi: true # Enable Managed Lustre for the cluster
+      enable_dataplane_v2: true
       enable_k8s_beta_apis:
       - "resource.k8s.io/v1beta1/deviceclasses"
       - "resource.k8s.io/v1beta1/resourceclaims"

modules/compute/gke-node-pool/README.md

@@ -346,7 +346,7 @@ limitations under the License.
 | <a name="input_disk_type"></a> [disk\_type](#input\_disk\_type) | Disk type for each node. | `string` | `null` | no |
 | <a name="input_dranet_allocation_mode"></a> [dranet\_allocation\_mode](#input\_dranet\_allocation\_mode) | Allocation mode for the auto-applied DRANET ResourceClaimTemplate (e.g., 'All' or 'ExactCount'). | `string` | `"All"` | no |
 | <a name="input_dranet_device_class_name"></a> [dranet\_device\_class\_name](#input\_dranet\_device\_class\_name) | DRA device class name. Default is mrdma.google.com (RDMA). Set to netdev.google.com for non-RDMA machines. | `string` | `"mrdma.google.com"` | no |
-| <a name="input_enable_dranet"></a> [enable\_dranet](#input\_enable\_dranet) | Enable GKE managed Dynamic Resource Allocation (DRA) driver for networking (DRANET) and Accelerator Network Profile (ANP). If null, automatically enabled for supported GPU/TPU nodes on GKE 1.34.1-gke.1829001 or later when Dataplane V2 is enabled on the cluster. | `bool` | `null` | no |
+| <a name="input_enable_dranet"></a> [enable\_dranet](#input\_enable\_dranet) | Enable GKE managed Dynamic Resource Allocation (DRA) driver for networking (DRANET) and Accelerator Network Profile (ANP). When set to true, this enables the driver for supported GPU/TPU nodes on GKE 1.34.1-gke.1829001 or later when Dataplane V2 is enabled on the cluster. | `bool` | `false` | no |
 | <a name="input_enable_flex_start"></a> [enable\_flex\_start](#input\_enable\_flex\_start) | If true, start the node pool with Flex Start provisioning model.<br/>To learn more about flex-start mode, please refer to<br/>https://cloud.google.com/kubernetes-engine/docs/how-to/dws-flex-start-training and<br/>https://cloud.google.com/kubernetes-engine/docs/how-to/provisioningrequest | `bool` | `false` | no |
 | <a name="input_enable_gcfs"></a> [enable\_gcfs](#input\_enable\_gcfs) | Enable the Google Container Filesystem (GCFS). See [restrictions](https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/container_cluster#gcfs_config). | `bool` | `false` | no |
 | <a name="input_enable_numa_aware_scheduling"></a> [enable\_numa\_aware\_scheduling](#input\_enable\_numa\_aware\_scheduling) | Enable [NUMA-aware](https://cloud.google.com/kubernetes-engine/distributed-cloud/bare-metal/docs/vm-runtime/numa) scheduling. | `bool` | `false` | no |

modules/compute/gke-node-pool/variables.tf

@@ -504,8 +504,8 @@ variable "enable_numa_aware_scheduling" {
 
 variable "enable_dranet" {
   type        = bool
-  default     = null
-  description = "Enable GKE managed Dynamic Resource Allocation (DRA) driver for networking (DRANET) and Accelerator Network Profile (ANP). If null, automatically enabled for supported GPU/TPU nodes on GKE 1.34.1-gke.1829001 or later when Dataplane V2 is enabled on the cluster."
+  default     = false
+  description = "Enable GKE managed Dynamic Resource Allocation (DRA) driver for networking (DRANET) and Accelerator Network Profile (ANP). When set to true, this enables the driver for supported GPU/TPU nodes on GKE 1.34.1-gke.1829001 or later when Dataplane V2 is enabled on the cluster."
 }
 
 variable "autoscaling_min_node_count" {