fix: update vars to use community prefix, and add docs

Signed-off-by: Carus Kyle <[email protected]>

Author: Carus11

docs/community/community_config_vars.md

@@ -27,3 +27,14 @@ To enable a Spot node pool in your AKS cluster using this module, configure the
 | community_eviction_policy | (Optional) The Eviction Policy which should be used for Virtual Machines within the Virtual Machine Scale Set powering this Node Pool. Possible values are Deallocate and Delete. Changing this forces a new resource to be created. | string | `Delete` | 10.3.0 | |
 | community_spot_max_price | (Optional) The maximum price you're willing to pay in USD per Virtual Machine. Valid values are -1 (the current on-demand price for a Virtual Machine) or a positive value with up to five decimal places. Changing this forces a new resource to be created. | string | `-1` | 10.3.0 | |
 
+
+## OS Disk Type and Kubelet Disk Type
+
+This gives the user the ability to choose the use the local temporary storage available to some nodes for the Operating system, and or the Kubelet.
+The benefit of doing this is the local temporary disk is typically a high performance type of storage medium. If the kubelet is set to use this fast storage, then local emptyDir volume can be used for workloads such as SASWORK. This configuration works well on E-series machines where there is one local temporary disk. For L-series machines with many high performance nvme drives, consider using Azure Container storage instead.
+
+| Name | Description | Type | Default | Release Added | Notes |
+| :--- | ---: | ---: | ---: | ---: | ---: |
+| community_os_disk_type | (Optional) The type of disk which should be used for the Operating System. Possible values are Ephemeral and Managed. Changing this forces a new resource to be created | string | `null` | 10.3.0 | |
+| community_kubelet_disk_type | (Optional) The type of disk which should be used for the Kubelet. Possible values are OS (Where the OS Disk Type is then used) and Temporary. Defaults to Managed. Changing this forces a new resource to be created | string | `null` | 10.3.0 | |
+

modules/aks_node_pool/main.tf

@@ -14,8 +14,6 @@ resource "azurerm_kubernetes_cluster_node_pool" "autoscale_node_pool" {
   proximity_placement_group_id = var.proximity_placement_group_id == "" ? null : var.proximity_placement_group_id
   vm_size                      = var.machine_type
   os_disk_size_gb              = var.os_disk_size
-  os_disk_type                 = var.os_disk_type
-  kubelet_disk_type            = var.kubelet_disk_type
   os_type                      = var.os_type
   auto_scaling_enabled         = var.auto_scaling_enabled
   node_public_ip_enabled       = var.node_public_ip_enabled
@@ -30,6 +28,8 @@ resource "azurerm_kubernetes_cluster_node_pool" "autoscale_node_pool" {
   priority                     = var.community_priority
   eviction_policy              = var.community_eviction_policy
   spot_max_price               = var.community_spot_max_price
+  os_disk_type                 = var.community_os_disk_type
+  kubelet_disk_type            = var.community_kubelet_disk_type
 
   lifecycle {
     ignore_changes = [node_count]

modules/aks_node_pool/variables.tf

@@ -46,13 +46,13 @@ variable "os_disk_size" {
   default     = 100
 }
 
-variable "os_disk_type" {
+variable "community_os_disk_type" {
    description = "(Optional) The type of disk which should be used for the Operating System. Possible values are Ephemeral and Managed. Changing this forces a new resource to be created"
    type = string
    default = null
 }
 
-variable "kubelet_disk_type" {
+variable "community_kubelet_disk_type" {
    description = "(Optional) The type of disk which should be used for the Kubelet. Possible values are OS (Where the OS Disk Type is then used) and Temporary. Defaults to Managed. Changing this forces a new resource to be created"
    type = string
    default = null