fix: Karpenter node IAM role policies variable should be a map of strings, not list (#2771)

modules/karpenter/README.md

@@ -42,6 +42,11 @@ module "karpenter" {
   irsa_oidc_provider_arn          = module.eks.oidc_provider_arn
   irsa_namespace_service_accounts = ["karpenter:karpenter"]
 
+  # Attach additional IAM policies to the Karpenter node IAM role
+  iam_role_additional_policies = {
+    AmazonSSMManagedInstanceCore = "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore"
+  }
+
   tags = {
     Environment = "dev"
     Terraform   = "true"
@@ -146,7 +151,7 @@ No modules.
 | <a name="input_create_instance_profile"></a> [create\_instance\_profile](#input\_create\_instance\_profile) | Whether to create an IAM instance profile | `bool` | `true` | no |
 | <a name="input_create_irsa"></a> [create\_irsa](#input\_create\_irsa) | Determines whether an IAM role for service accounts is created | `bool` | `true` | no |
 | <a name="input_enable_spot_termination"></a> [enable\_spot\_termination](#input\_enable\_spot\_termination) | Determines whether to enable native spot termination handling | `bool` | `true` | no |
-| <a name="input_iam_role_additional_policies"></a> [iam\_role\_additional\_policies](#input\_iam\_role\_additional\_policies) | Additional policies to be added to the IAM role | `list(string)` | `[]` | no |
+| <a name="input_iam_role_additional_policies"></a> [iam\_role\_additional\_policies](#input\_iam\_role\_additional\_policies) | Additional policies to be added to the IAM role | `map(string)` | `{}` | no |
 | <a name="input_iam_role_arn"></a> [iam\_role\_arn](#input\_iam\_role\_arn) | Existing IAM role ARN for the IAM instance profile. Required if `create_iam_role` is set to `false` | `string` | `null` | no |
 | <a name="input_iam_role_attach_cni_policy"></a> [iam\_role\_attach\_cni\_policy](#input\_iam\_role\_attach\_cni\_policy) | Whether to attach the `AmazonEKS_CNI_Policy`/`AmazonEKS_CNI_IPv6_Policy` IAM policy to the IAM IAM role. WARNING: If set `false` the permissions must be assigned to the `aws-node` DaemonSet pods via another method or nodes will not be able to join the cluster | `bool` | `true` | no |
 | <a name="input_iam_role_description"></a> [iam\_role\_description](#input\_iam\_role\_description) | Description of the role | `string` | `null` | no |

modules/karpenter/main.tf

@@ -224,7 +224,6 @@ data "aws_iam_policy_document" "queue" {
         "sqs.${local.dns_suffix}",
       ]
     }
-
   }
 }
 

modules/karpenter/variables.tf

@@ -223,8 +223,8 @@ variable "iam_role_attach_cni_policy" {
 
 variable "iam_role_additional_policies" {
   description = "Additional policies to be added to the IAM role"
-  type        = list(string)
-  default     = []
+  type        = map(string)
+  default     = {}
 }
 
 variable "iam_role_tags" {