feat: Add support for custom IAM role policy (#3087)

modules/eks-managed-node-group/main.tf

@@ -325,6 +325,7 @@ resource "aws_launch_template" "this" {
   # require permissions on create/destroy that depend on nodes
   depends_on = [
     aws_iam_role_policy_attachment.this,
+    aws_iam_role_policy_attachment.additional,
   ]
 
   lifecycle {
@@ -535,6 +536,68 @@ resource "aws_iam_role_policy_attachment" "additional" {
   role       = aws_iam_role.this[0].name
 }
 
+################################################################################
+# IAM Role Policy
+################################################################################
+
+locals {
+  create_iam_role_policy = local.create_iam_role && var.create_iam_role_policy && length(var.iam_role_policy_statements) > 0
+}
+
+data "aws_iam_policy_document" "role" {
+  count = local.create_iam_role_policy ? 1 : 0
+
+  dynamic "statement" {
+    for_each = var.iam_role_policy_statements
+
+    content {
+      sid           = try(statement.value.sid, null)
+      actions       = try(statement.value.actions, null)
+      not_actions   = try(statement.value.not_actions, null)
+      effect        = try(statement.value.effect, null)
+      resources     = try(statement.value.resources, null)
+      not_resources = try(statement.value.not_resources, null)
+
+      dynamic "principals" {
+        for_each = try(statement.value.principals, [])
+
+        content {
+          type        = principals.value.type
+          identifiers = principals.value.identifiers
+        }
+      }
+
+      dynamic "not_principals" {
+        for_each = try(statement.value.not_principals, [])
+
+        content {
+          type        = not_principals.value.type
+          identifiers = not_principals.value.identifiers
+        }
+      }
+
+      dynamic "condition" {
+        for_each = try(statement.value.conditions, [])
+
+        content {
+          test     = condition.value.test
+          values   = condition.value.values
+          variable = condition.value.variable
+        }
+      }
+    }
+  }
+}
+
+resource "aws_iam_role_policy" "this" {
+  count = local.create_iam_role_policy ? 1 : 0
+
+  name        = var.iam_role_use_name_prefix ? null : local.iam_role_name
+  name_prefix = var.iam_role_use_name_prefix ? "${local.iam_role_name}-" : null
+  policy      = data.aws_iam_policy_document.role[0].json
+  role        = aws_iam_role.this[0].id
+}
+
 ################################################################################
 # Placement Group
 ################################################################################