fix: Fixed launch_templates_with_managed_node_group example (terraform-aws-modules#1599)

Author: PascalBourdier

examples/launch_templates_with_managed_node_groups/disk_encryption_policy.tf

@@ -2,6 +2,7 @@
 resource "aws_iam_service_linked_role" "autoscaling" {
   aws_service_name = "autoscaling.amazonaws.com"
   description      = "Default Service-Linked Role enables access to AWS Services and Resources used or managed by Auto Scaling"
+  custom_suffix    = "lt_with_managed_node_groups" # the full name is "AWSServiceRoleForAutoScaling_lt_with_managed_node_groups" < 64 characters
 }
 
 #data "aws_caller_identity" "current" {}

examples/launch_templates_with_managed_node_groups/launchtemplate.tf

@@ -37,8 +37,6 @@ resource "aws_launch_template" "default" {
     }
   }
 
-  instance_type = var.instance_type
-
   monitoring {
     enabled = true
   }

examples/launch_templates_with_managed_node_groups/main.tf

@@ -62,6 +62,8 @@ module "eks" {
       launch_template_id      = aws_launch_template.default.id
       launch_template_version = aws_launch_template.default.default_version
 
+      instance_types = var.instance_types
+
       additional_tags = {
         CustomTag = "EKS example"
       }

examples/launch_templates_with_managed_node_groups/variables.tf

@@ -1,6 +1,6 @@
-variable "instance_type" {
-  description = "Instance type"
+variable "instance_types" {
+  description = "Instance types"
   # Smallest recommended, where ~1.1Gb of 2Gb memory is available for the Kubernetes pods after ‘warming up’ Docker, Kubelet, and OS
-  type    = string
-  default = "t3.small"
+  type    = list(string)
+  default = ["t3.small"]
 }