From 4d60e817e26b7399d9c09466911f9d3c5e832fba Mon Sep 17 00:00:00 2001
From: Olamide <Olamide@thoughtbot.com>
Date: Wed, 25 Sep 2024 17:55:11 +0100
Subject: [PATCH] Pass in custom metadata options to the eks launch template

---
 aws/cluster/modules/eks-node-group/main.tf    | 20 ++++++++++++++++---
 .../modules/eks-node-group/variables.tf       |  6 ++++++
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/aws/cluster/modules/eks-node-group/main.tf b/aws/cluster/modules/eks-node-group/main.tf
index 4f4013d..4ca6a46 100644
--- a/aws/cluster/modules/eks-node-group/main.tf
+++ b/aws/cluster/modules/eks-node-group/main.tf
@@ -9,7 +9,7 @@ resource "aws_eks_node_group" "this" {
   subnet_ids      = [each.value.id]
 
   dynamic "launch_template" {
-    for_each = var.user_data != null ? [aws_launch_template.this[0]] : []
+    for_each = var.metadata_options != {} ? [aws_launch_template.this[0]] : []
 
     content {
       id      = launch_template.value.id
@@ -40,10 +40,22 @@ resource "aws_eks_node_group" "this" {
   }
 }
 
+# resource "aws_launch_template" "this" {
+#   count = var.user_data != null ? 1 : 0
+
+#   user_data = base64encode(var.user_data)
+# }
+
 resource "aws_launch_template" "this" {
-  count = var.user_data != null ? 1 : 0
+  count = var.metadata_options != {} ? 1 : 0
 
-  user_data = base64encode(var.user_data)
+  metadata_options {
+    http_endpoint               = lookup(var.metadata_options, "http_endpoint", "enabled")
+    http_tokens                 = lookup(var.metadata_options, "http_tokens", "optional")
+    http_put_response_hop_limit = lookup(var.metadata_options, "htthttp_put_response_hop_limit", "1")
+    http_protocol_ipv6          = lookup(var.metadata_options, "http_protocol_ipv6", "disabled")
+    instance_metadata_tags      = lookup(var.metadata_options, "instance_metadata_tags", "disabled")
+  }
 }
 
 locals {
@@ -54,4 +66,6 @@ locals {
     var.subnets[*].availability_zone,
     var.subnets
   )
+
+
 }
diff --git a/aws/cluster/modules/eks-node-group/variables.tf b/aws/cluster/modules/eks-node-group/variables.tf
index 71d495d..45a1232 100644
--- a/aws/cluster/modules/eks-node-group/variables.tf
+++ b/aws/cluster/modules/eks-node-group/variables.tf
@@ -75,3 +75,9 @@ variable "user_data" {
   description = "Optional user data script for the launch template"
   default     = null # Default to an empty string if no user data is provided
 }
+
+variable "metadata_options" {
+  type        = map(string)
+  description = "Customize the metadata options for the cluster nodes"
+  default     = {}
+}