feat: Removed ng_depends_on variable and related hack (terraform-aws-modules#1672)

Author: daroga0002

modules/node_groups/README.md

@@ -97,7 +97,6 @@ No modules.
 | <a name="input_create_eks"></a> [create\_eks](#input\_create\_eks) | Controls if EKS resources should be created (it affects almost all resources) | `bool` | `true` | no |
 | <a name="input_default_iam_role_arn"></a> [default\_iam\_role\_arn](#input\_default\_iam\_role\_arn) | ARN of the default IAM worker role to use if one is not specified in `var.node_groups` or `var.node_groups_defaults` | `string` | `""` | no |
 | <a name="input_ebs_optimized_not_supported"></a> [ebs\_optimized\_not\_supported](#input\_ebs\_optimized\_not\_supported) | List of instance types that do not support EBS optimization | `list(string)` | `[]` | no |
-| <a name="input_ng_depends_on"></a> [ng\_depends\_on](#input\_ng\_depends\_on) | List of references to other resources this submodule depends on | `any` | `null` | no |
 | <a name="input_node_groups"></a> [node\_groups](#input\_node\_groups) | Map of maps of `eks_node_groups` to create. See "`node_groups` and `node_groups_defaults` keys" section in README.md for more details | `any` | `{}` | no |
 | <a name="input_node_groups_defaults"></a> [node\_groups\_defaults](#input\_node\_groups\_defaults) | map of maps of node groups to create. See "`node_groups` and `node_groups_defaults` keys" section in README.md for more details | `any` | `{}` | no |
 | <a name="input_tags"></a> [tags](#input\_tags) | A map of tags to add to all resources | `map(string)` | `{}` | no |

modules/node_groups/main.tf

@@ -102,5 +102,4 @@ resource "aws_eks_node_group" "workers" {
     ignore_changes        = [scaling_config[0].desired_size]
   }
 
-  depends_on = [var.ng_depends_on]
 }

modules/node_groups/variables.tf

@@ -64,14 +64,6 @@ variable "node_groups" {
   default     = {}
 }
 
-# Hack for a homemade `depends_on` https://discuss.hashicorp.com/t/tips-howto-implement-module-depends-on-emulation/2305/2
-# Will be removed in Terraform 0.13 with the support of module's `depends_on` https://github.com/hashicorp/terraform/issues/10462
-variable "ng_depends_on" {
-  description = "List of references to other resources this submodule depends on"
-  type        = any
-  default     = null
-}
-
 variable "ebs_optimized_not_supported" {
   description = "List of instance types that do not support EBS optimization"
   type        = list(string)

node_groups.tf

@@ -18,14 +18,8 @@ module "node_groups" {
 
   tags = var.tags
 
-  # Hack to ensure ordering of resource creation.
-  # This is a homemade `depends_on` https://discuss.hashicorp.com/t/tips-howto-implement-module-depends-on-emulation/2305/2
-  # Do not create node_groups before other resources are ready and removes race conditions
-  # Ensure these resources are created before "unlocking" the data source.
-  # Will be removed in Terraform 0.13
-  ng_depends_on = [
+  depends_on = [
     aws_eks_cluster.this,
-    kubernetes_config_map.aws_auth,
     aws_iam_role_policy_attachment.workers_AmazonEKSWorkerNodePolicy,
     aws_iam_role_policy_attachment.workers_AmazonEKS_CNI_Policy,
     aws_iam_role_policy_attachment.workers_AmazonEC2ContainerRegistryReadOnly