docs: Make it more obvious that var.cluster_iam_role_name will allo…

…w reusing an existing IAM Role for the cluster. (#1133)

README.md

@@ -179,7 +179,7 @@ MIT Licensed. See [LICENSE](https://github.com/terraform-aws-modules/terraform-a
 | cluster\_endpoint\_private\_access\_cidrs | List of CIDR blocks which can access the Amazon EKS private API server endpoint. | `list(string)` | `null` | no |
 | cluster\_endpoint\_public\_access | Indicates whether or not the Amazon EKS public API server endpoint is enabled. | `bool` | `true` | no |
 | cluster\_endpoint\_public\_access\_cidrs | List of CIDR blocks which can access the Amazon EKS public API server endpoint. | `list(string)` | <pre>[<br>  "0.0.0.0/0"<br>]</pre> | no |
-| cluster\_iam\_role\_name | IAM role name for the cluster. Only applicable if manage\_cluster\_iam\_resources is set to false. | `string` | `""` | no |
+| cluster\_iam\_role\_name | IAM role name for the cluster. Only applicable if manage\_cluster\_iam\_resources is set to false. Set this to reuse an existing IAM role. | `string` | `""` | no |
 | cluster\_log\_kms\_key\_id | If a KMS Key ARN is set, this key will be used to encrypt the corresponding log group. Please be sure that the KMS Key has an appropriate key policy (https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/encrypt-log-data-kms.html) | `string` | `""` | no |
 | cluster\_log\_retention\_in\_days | Number of days to retain log events. Default retention - 90 days. | `number` | `90` | no |
 | cluster\_name | Name of the EKS cluster. Also used as a prefix in names of related resources. | `string` | n/a | yes |

variables.tf

@@ -3,11 +3,13 @@ variable "cluster_enabled_log_types" {
   description = "A list of the desired control plane logging to enable. For more information, see Amazon EKS Control Plane Logging documentation (https://docs.aws.amazon.com/eks/latest/userguide/control-plane-logs.html)"
   type        = list(string)
 }
+
 variable "cluster_log_kms_key_id" {
   default     = ""
   description = "If a KMS Key ARN is set, this key will be used to encrypt the corresponding log group. Please be sure that the KMS Key has an appropriate key policy (https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/encrypt-log-data-kms.html)"
   type        = string
 }
+
 variable "cluster_log_retention_in_days" {
   default     = 90
   description = "Number of days to retain log events. Default retention - 90 days."
@@ -288,7 +290,7 @@ variable "manage_cluster_iam_resources" {
 }
 
 variable "cluster_iam_role_name" {
-  description = "IAM role name for the cluster. Only applicable if manage_cluster_iam_resources is set to false."
+  description = "IAM role name for the cluster. Only applicable if manage_cluster_iam_resources is set to false. Set this to reuse an existing IAM role."
   type        = string
   default     = ""
 }