Add support for Launch templates

README.md

@@ -140,7 +140,7 @@ MIT Licensed. See [LICENSE](https://github.com/terraform-aws-modules/terraform-a
 | Name | Version |
 |------|---------|
 | terraform | >= 0.12.9 |
-| aws | >= 2.55.0 |
+| aws | >= 3.3.0 |
 | kubernetes | >= 1.11.1 |
 | local | >= 1.4 |
 | null | >= 2.1 |
@@ -151,7 +151,7 @@ MIT Licensed. See [LICENSE](https://github.com/terraform-aws-modules/terraform-a
 
 | Name | Version |
 |------|---------|
-| aws | >= 2.55.0 |
+| aws | >= 3.3.0 |
 | kubernetes | >= 1.11.1 |
 | local | >= 1.4 |
 | null | >= 2.1 |

examples/irsa/irsa.tf

@@ -1,6 +1,6 @@
 module "iam_assumable_role_admin" {
   source                        = "terraform-aws-modules/iam/aws//modules/iam-assumable-role-with-oidc"
-  version                       = "~> v2.6.0"
+  version                       = "~> v2.0"
   create_role                   = true
   role_name                     = "cluster-autoscaler"
   provider_url                  = replace(module.eks.cluster_oidc_issuer_url, "https://", "")

local.tf

@@ -78,6 +78,7 @@ locals {
     # Settings for launch templates
     root_block_device_name               = data.aws_ami.eks_worker.root_device_name # Root device name for workers. If non is provided, will assume default AMI was used.
     root_kms_key_id                      = ""                                       # The KMS key to use when encrypting the root storage device
+    launch_template_id                   = ""                                       # The id of the launch template used for managed node_groups
     launch_template_version              = "$Latest"                                # The lastest version of the launch template to use in the autoscaling group
     launch_template_placement_tenancy    = "default"                                # The placement tenancy for instances
     launch_template_placement_group      = null                                     # The name of the placement group into which to launch the instances, if any.

modules/node_groups/locals.tf

@@ -2,13 +2,15 @@ locals {
   # Merge defaults and per-group values to make code cleaner
   node_groups_expanded = { for k, v in var.node_groups : k => merge(
     {
-      desired_capacity = var.workers_group_defaults["asg_desired_capacity"]
-      iam_role_arn     = var.default_iam_role_arn
-      instance_type    = var.workers_group_defaults["instance_type"]
-      key_name         = var.workers_group_defaults["key_name"]
-      max_capacity     = var.workers_group_defaults["asg_max_size"]
-      min_capacity     = var.workers_group_defaults["asg_min_size"]
-      subnets          = var.workers_group_defaults["subnets"]
+      desired_capacity        = var.workers_group_defaults["asg_desired_capacity"]
+      iam_role_arn            = var.default_iam_role_arn
+      instance_type           = var.workers_group_defaults["instance_type"]
+      key_name                = var.workers_group_defaults["key_name"]
+      launch_template_id      = var.workers_group_defaults["launch_template_id"]
+      launch_template_version = var.workers_group_defaults["launch_template_version"]
+      max_capacity            = var.workers_group_defaults["asg_max_size"]
+      min_capacity            = var.workers_group_defaults["asg_min_size"]
+      subnets                 = var.workers_group_defaults["subnets"]
     },
     var.node_groups_defaults,
     v,

modules/node_groups/node_groups.tf

@@ -15,7 +15,7 @@ resource "aws_eks_node_group" "workers" {
 
   ami_type        = lookup(each.value, "ami_type", null)
   disk_size       = lookup(each.value, "disk_size", null)
-  instance_types  = [each.value["instance_type"]]
+  instance_types  = each.value["launch_template_id"] != "" ? [] : [each.value["instance_type"]]
   release_version = lookup(each.value, "ami_release_version", null)
 
   dynamic "remote_access" {
@@ -30,6 +30,18 @@ resource "aws_eks_node_group" "workers" {
     }
   }
 
+  dynamic "launch_template" {
+    for_each = each.value["launch_template_id"] != "" ? [{
+      id      = each.value["launch_template_id"]
+      version = each.value["launch_template_version"]
+    }] : []
+
+    content {
+      id      = launch_template.value["id"]
+      version = launch_template.value["version"]
+    }
+  }
+
   version = lookup(each.value, "version", null)
 
   labels = merge(

versions.tf

@@ -2,7 +2,7 @@ terraform {
   required_version = ">= 0.12.9"
 
   required_providers {
-    aws        = ">= 2.55.0"
+    aws        = ">= 3.3.0"
     local      = ">= 1.4"
     null       = ">= 2.1"
     template   = ">= 2.1"