Added wrappers

Author: gaspo53

.pre-commit-config.yaml

@@ -3,6 +3,7 @@ repos:
     rev: v1.96.1
     hooks:
       - id: terraform_fmt
+      - id: terraform_wrapper_module_for_each
       - id: terraform_docs
         args:
           - '--args=--lockfile=false'

wrappers/README.md

@@ -0,0 +1,100 @@
+# Wrapper for the root module
+
+The configuration in this directory contains an implementation of a single module wrapper pattern, which allows managing several copies of a module in places where using the native Terraform 0.13+ `for_each` feature is not feasible (e.g., with Terragrunt).
+
+You may want to use a single Terragrunt configuration file to manage multiple resources without duplicating `terragrunt.hcl` files for each copy of the same module.
+
+This wrapper does not implement any extra functionality.
+
+## Usage with Terragrunt
+
+`terragrunt.hcl`:
+
+```hcl
+terraform {
+  source = "tfr:///terraform-aws-modules/key-pair/aws//wrappers"
+  # Alternative source:
+  # source = "git::git@github.com:terraform-aws-modules/terraform-aws-key-pair.git//wrappers?ref=master"
+}
+
+inputs = {
+  defaults = { # Default values
+    create = true
+    tags = {
+      Terraform   = "true"
+      Environment = "dev"
+    }
+  }
+
+  items = {
+    my-item = {
+      # omitted... can be any argument supported by the module
+    }
+    my-second-item = {
+      # omitted... can be any argument supported by the module
+    }
+    # omitted...
+  }
+}
+```
+
+## Usage with Terraform
+
+```hcl
+module "wrapper" {
+  source = "terraform-aws-modules/key-pair/aws//wrappers"
+
+  defaults = { # Default values
+    create = true
+    tags = {
+      Terraform   = "true"
+      Environment = "dev"
+    }
+  }
+
+  items = {
+    my-item = {
+      # omitted... can be any argument supported by the module
+    }
+    my-second-item = {
+      # omitted... can be any argument supported by the module
+    }
+    # omitted...
+  }
+}
+```
+
+## Example: Manage multiple S3 buckets in one Terragrunt layer
+
+`eu-west-1/s3-buckets/terragrunt.hcl`:
+
+```hcl
+terraform {
+  source = "tfr:///terraform-aws-modules/s3-bucket/aws//wrappers"
+  # Alternative source:
+  # source = "git::git@github.com:terraform-aws-modules/terraform-aws-s3-bucket.git//wrappers?ref=master"
+}
+
+inputs = {
+  defaults = {
+    force_destroy = true
+
+    attach_elb_log_delivery_policy        = true
+    attach_lb_log_delivery_policy         = true
+    attach_deny_insecure_transport_policy = true
+    attach_require_latest_tls_policy      = true
+  }
+
+  items = {
+    bucket1 = {
+      bucket = "my-random-bucket-1"
+    }
+    bucket2 = {
+      bucket = "my-random-bucket-2"
+      tags = {
+        Secure = "probably"
+      }
+    }
+  }
+}
+```

wrappers/main.tf

@@ -0,0 +1,14 @@
+module "wrapper" {
+  source = "../"
+
+  for_each = var.items
+
+  create                = try(each.value.create, var.defaults.create, true)
+  create_private_key    = try(each.value.create_private_key, var.defaults.create_private_key, false)
+  key_name              = try(each.value.key_name, var.defaults.key_name, null)
+  key_name_prefix       = try(each.value.key_name_prefix, var.defaults.key_name_prefix, null)
+  private_key_algorithm = try(each.value.private_key_algorithm, var.defaults.private_key_algorithm, "RSA")
+  private_key_rsa_bits  = try(each.value.private_key_rsa_bits, var.defaults.private_key_rsa_bits, 4096)
+  public_key            = try(each.value.public_key, var.defaults.public_key, "")
+  tags                  = try(each.value.tags, var.defaults.tags, {})
+}

wrappers/outputs.tf

@@ -0,0 +1,5 @@
+output "wrapper" {
+  description = "Map of outputs of a wrapper."
+  value       = module.wrapper
+  sensitive   = true # At least one sensitive module output (private_key_openssh) found (requires Terraform 0.14+)
+}

wrappers/variables.tf

@@ -0,0 +1,11 @@
+variable "defaults" {
+  description = "Map of default values which will be used for each item."
+  type        = any
+  default     = {}
+}
+
+variable "items" {
+  description = "Maps of items to create a wrapper from. Values are passed through to the module."
+  type        = any
+  default     = {}
+}

wrappers/versions.tf

@@ -0,0 +1,14 @@
+terraform {
+  required_version = ">= 1.0"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 4.21"
+    }
+    tls = {
+      source  = "hashicorp/tls"
+      version = ">= 3.4"
+    }
+  }
+}