fix: update default AKS node pool VM size to Standard_D2s_v4

Author: pauldotyu

docs/azd.md

@@ -88,7 +88,7 @@ The following environment variables control what gets deployed:
 | Variable                          | Description                                                                                                                                                        |
 | --------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `AZURE_LOCATION`                  | The Azure region for the deployment.                                                                                                                               |
-| `AKS_NODE_POOL_VM_SIZE`           | AKS node VM size. Default: `Standard_D2_v4`.                                                                                                                       |
+| `AKS_NODE_POOL_VM_SIZE`           | AKS node VM size. Default: `Standard_D2s_v4`.                                                                                                                      |
 | `DEPLOY_AZURE_CONTAINER_REGISTRY` | Set `true` to provision Azure Container Registry (ACR). When enabled, images are either imported from GHCR or built to ACR and the deployment uses that registry.  |
 | `BUILD_CONTAINERS`                | With ACR enabled (above), set `true` to build images from `src/*` using `az acr build`. If `false`/unset, images are imported from GHCR into ACR.                  |
 | `DEPLOY_AZURE_OPENAI`             | Set `true` to deploy Azure OpenAI and enable `ai-service` with workload identity.                                                                                  |
@@ -107,7 +107,7 @@ These environment variables listed above can be set with commands like this:
 azd env set AZURE_LOCATION swedencentral
 
 # set the SKU of the virtual machine scale set nodes in the AKS cluster
-azd env set AKS_NODE_POOL_VM_SIZE Standard_D2_v4
+azd env set AKS_NODE_POOL_VM_SIZE Standard_D2s_v4
 
 # deploys azure container registry and imports containers from github container registry
 azd env set DEPLOY_AZURE_CONTAINER_REGISTRY true

infra/bicep/kubernetes.bicep

@@ -1,7 +1,7 @@
 param location string
 @minLength(3)
 param nameSuffix string
-param vmSku string = 'Standard_D2_v4'
+param vmSku string
 param deployAcr bool
 param logsWorkspaceResourceId string
 param metricsWorkspaceResourceId string

infra/bicep/main.bicep

@@ -13,7 +13,7 @@ param location string
 param appEnvironment string
 
 @description('value of azure kubernetes node pool vm size')
-param aksNodePoolVMSize string = 'Standard_D2_v4'
+param aksNodePoolVMSize string = 'Standard_D2s_v4'
 
 @description('value of the kubernetes namespace')
 param k8sNamespace string = 'pets'

infra/terraform/main.tf

@@ -67,7 +67,7 @@ data "http" "current_ip" {
 
 locals {
   name                            = "${var.environment}${random_pet.example.id}${random_integer.example.result}"
-  aks_node_pool_vm_size           = var.aks_node_pool_vm_size != "" ? var.aks_node_pool_vm_size : "Standard_D2_v4"
+  aks_node_pool_vm_size           = var.aks_node_pool_vm_size != "" ? var.aks_node_pool_vm_size : "Standard_D2s_v4"
   deploy_azure_cosmosdb           = var.deploy_azure_cosmosdb == "true" ? true : false
   default_cosmosdb_account_kind   = "GlobalDocumentDB"
   cosmosdb_account_kind           = var.cosmosdb_account_kind != "" ? var.cosmosdb_account_kind : local.default_cosmosdb_account_kind

infra/terraform/variables.tf

@@ -11,7 +11,7 @@ variable "environment" {
 variable "aks_node_pool_vm_size" {
   description = "value of azure kubernetes node pool vm size"
   type        = string
-  default     = "Standard_D2_v4"
+  default     = "Standard_D2s_v4"
 }
 
 variable "k8s_namespace" {