feat: Parameterize number of kubernetes nodes

main.tf

@@ -119,6 +119,9 @@ module "app_eks" {
   kms_key_arn = local.kms_key_arn
 
   instance_types = var.kubernetes_instance_types
+  desired_nodes  = var.kubernetes_desired_nodes
+  max_nodes      = var.kubernetes_max_nodes
+  min_nodes      = var.kubernetes_min_nodes
   map_accounts   = var.kubernetes_map_accounts
   map_roles      = var.kubernetes_map_roles
   map_users      = var.kubernetes_map_users

modules/app_eks/main.tf

@@ -55,9 +55,9 @@ module "eks" {
   node_groups = {
     primary = {
       version                = var.cluster_version,
-      desired_capacity       = 2,
-      max_capacity           = 5,
-      min_capacity           = 2,
+      desired_capacity       = var.desired_nodes,
+      max_capacity           = var.max_nodes,
+      min_capacity           = var.min_nodes,
       instance_types         = var.instance_types,
       iam_role_arn           = aws_iam_role.node.arn,
       create_launch_template = local.encrypt_ebs_volume,

modules/app_eks/variables.tf

@@ -112,3 +112,17 @@ variable "service_port" {
   default = 32543
 }
 
+variable "desired_nodes" {
+  type        = number
+  description = "(Required) Desired number of nodes in EKS"
+}
+
+variable "max_nodes" {
+  type        = number
+  description = "(Required) Max number of nodes in EKS"
+}
+
+variable "min_nodes" {
+  type        = number
+  description = "(Required) Min number of nodes in EKS"
+}

variables.tf

@@ -282,6 +282,24 @@ variable "kubernetes_instance_types" {
   default     = ["m5.large"]
 }
 
+variable "kubernetes_desired_nodes" {
+  type        = number
+  description = "(Optional) Desired number of nodes in EKS"
+  default     = 2
+}
+
+variable "kubernetes_max_nodes" {
+  type        = number
+  description = "(Optional) Max number of nodes in EKS"
+  default     = 5
+}
+
+variable "kubernetes_min_nodes" {
+  type        = number
+  description = "(Optional) Min number of nodes in EKS"
+  default     = 2
+}
+
 variable "eks_policy_arns" {
   type        = list(string)
   description = "Additional IAM policy to apply to the EKS cluster"