chore(release): version 4.2.1 [skip ci]

## [4.2.1](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/compare/v4.2.0...v4.2.1) (2025-10-21)

### Bug Fixes

* Update CI workflow versions to latest ([#40](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/issues/40)) ([5deff22](5deff22cf4))

.github/workflows/pr-title.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
       # Please look up the latest version from
       # https://github.com/amannn/action-semantic-pull-request/releases
-      - uses: amannn/action-semantic-pull-request@v5.5.3
+      - uses: amannn/action-semantic-pull-request@v6.1.1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:

.github/workflows/pre-commit.yml

@@ -7,8 +7,8 @@ on:
       - master
 
 env:
-  TERRAFORM_DOCS_VERSION: v0.19.0
-  TFLINT_VERSION: v0.53.0
+  TERRAFORM_DOCS_VERSION: v0.20.0
+  TFLINT_VERSION: v0.59.1
 
 jobs:
   collectInputs:
@@ -18,11 +18,11 @@ jobs:
       directories: ${{ steps.dirs.outputs.directories }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Get root directories
         id: dirs
-        uses: clowdhaus/terraform-composite-actions/directories@v1.9.0
+        uses: clowdhaus/terraform-composite-actions/directories@v1.14.0
 
   preCommitMinVersions:
     name: Min TF pre-commit
@@ -32,27 +32,49 @@ jobs:
       matrix:
         directory: ${{ fromJson(needs.collectInputs.outputs.directories) }}
     steps:
+      - name: Install rmz
+        uses: jaxxstorm/action-install-gh-release@v2.1.0
+        with:
+          repo: SUPERCILEX/fuc
+          asset-name: x86_64-unknown-linux-gnu-rmz
+          rename-to: rmz
+          chmod: 0755
+          extension-matching: disable
+
       # https://github.com/orgs/community/discussions/25678#discussioncomment-5242449
-      - name: Delete huge unnecessary tools folder
+      - name: Delete unnecessary files
         run: |
-          rm -rf /opt/hostedtoolcache/CodeQL
-          rm -rf /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk
-          rm -rf /opt/hostedtoolcache/Ruby
-          rm -rf /opt/hostedtoolcache/go
+          formatByteCount() { echo $(numfmt --to=iec-i --suffix=B --padding=7 $1'000'); }
+          getAvailableSpace() { echo $(df -a $1 | awk 'NR > 1 {avail+=$4} END {print avail}'); }
+
+          BEFORE=$(getAvailableSpace)
+
+          ln -s /opt/hostedtoolcache/SUPERCILEX/x86_64-unknown-linux-gnu-rmz/latest/linux-x64/rmz /usr/local/bin/rmz
+          rmz -f /opt/hostedtoolcache/CodeQL &
+          rmz -f /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk &
+          rmz -f /opt/hostedtoolcache/PyPy &
+          rmz -f /opt/hostedtoolcache/Ruby &
+          rmz -f /opt/hostedtoolcache/go &
+
+          wait
+
+          AFTER=$(getAvailableSpace)
+          SAVED=$((AFTER-BEFORE))
+          echo "=> Saved $(formatByteCount $SAVED)"
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Terraform min/max versions
         id: minMax
-        uses: clowdhaus/terraform-min-max@v1.3.1
+        uses: clowdhaus/terraform-min-max@v2.1.0
         with:
           directory: ${{ matrix.directory }}
 
       - name: Pre-commit Terraform ${{ steps.minMax.outputs.minVersion }}
         # Run only validate pre-commit check on min version supported
         if: ${{ matrix.directory !=  '.' }}
-        uses: clowdhaus/terraform-composite-actions/pre-commit@v1.11.1
+        uses: clowdhaus/terraform-composite-actions/pre-commit@v1.14.0
         with:
           terraform-version: ${{ steps.minMax.outputs.minVersion }}
           tflint-version: ${{ env.TFLINT_VERSION }}
@@ -61,7 +83,7 @@ jobs:
       - name: Pre-commit Terraform ${{ steps.minMax.outputs.minVersion }}
         # Run only validate pre-commit check on min version supported
         if: ${{ matrix.directory ==  '.' }}
-        uses: clowdhaus/terraform-composite-actions/pre-commit@v1.11.1
+        uses: clowdhaus/terraform-composite-actions/pre-commit@v1.14.0
         with:
           terraform-version: ${{ steps.minMax.outputs.minVersion }}
           tflint-version: ${{ env.TFLINT_VERSION }}
@@ -72,26 +94,73 @@ jobs:
     runs-on: ubuntu-latest
     needs: collectInputs
     steps:
+      - name: Install rmz
+        uses: jaxxstorm/action-install-gh-release@v2.1.0
+        with:
+          repo: SUPERCILEX/fuc
+          asset-name: x86_64-unknown-linux-gnu-rmz
+          rename-to: rmz
+          chmod: 0755
+          extension-matching: disable
+
       # https://github.com/orgs/community/discussions/25678#discussioncomment-5242449
-      - name: Delete huge unnecessary tools folder
+      - name: Delete unnecessary files
         run: |
-          rm -rf /opt/hostedtoolcache/CodeQL
-          rm -rf /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk
-          rm -rf /opt/hostedtoolcache/Ruby
-          rm -rf /opt/hostedtoolcache/go
+          formatByteCount() { echo $(numfmt --to=iec-i --suffix=B --padding=7 $1'000'); }
+          getAvailableSpace() { echo $(df -a $1 | awk 'NR > 1 {avail+=$4} END {print avail}'); }
+
+          BEFORE=$(getAvailableSpace)
+
+          ln -s /opt/hostedtoolcache/SUPERCILEX/x86_64-unknown-linux-gnu-rmz/latest/linux-x64/rmz /usr/local/bin/rmz
+          rmz -f /opt/hostedtoolcache/CodeQL &
+          rmz -f /opt/hostedtoolcache/Java_Temurin-Hotspot_jdk &
+          rmz -f /opt/hostedtoolcache/PyPy &
+          rmz -f /opt/hostedtoolcache/Ruby &
+          rmz -f /opt/hostedtoolcache/go &
+          sudo rmz -f /usr/local/lib/android &
+
+          if [[ ${{ github.repository }} == terraform-aws-modules/terraform-aws-security-group ]]; then
+            sudo rmz -f /usr/share/dotnet &
+            sudo rmz -f /usr/local/.ghcup &
+            sudo apt-get -qq remove -y 'azure-.*'
+            sudo apt-get -qq remove -y 'cpp-.*'
+            sudo apt-get -qq remove -y 'dotnet-runtime-.*'
+            sudo apt-get -qq remove -y 'google-.*'
+            sudo apt-get -qq remove -y 'libclang-.*'
+            sudo apt-get -qq remove -y 'libllvm.*'
+            sudo apt-get -qq remove -y 'llvm-.*'
+            sudo apt-get -qq remove -y 'mysql-.*'
+            sudo apt-get -qq remove -y 'postgresql-.*'
+            sudo apt-get -qq remove -y 'php.*'
+            sudo apt-get -qq remove -y 'temurin-.*'
+            sudo apt-get -qq remove -y kubectl firefox mono-devel
+            sudo apt-get -qq autoremove -y
+            sudo apt-get -qq clean
+          fi
+
+          wait
+
+          AFTER=$(getAvailableSpace)
+          SAVED=$((AFTER-BEFORE))
+          echo "=> Saved $(formatByteCount $SAVED)"
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: ${{ github.event.pull_request.head.ref }}
           repository: ${{github.event.pull_request.head.repo.full_name}}
 
       - name: Terraform min/max versions
         id: minMax
-        uses: clowdhaus/terraform-min-max@v1.3.1
+        uses: clowdhaus/terraform-min-max@v2.1.0
+
+      - name: Hide template dir
+        # Special to this repo, we don't want to check this dir
+        if: ${{ github.repository ==  'terraform-aws-modules/terraform-aws-security-group' }}
+        run: rm -rf modules/_templates
 
       - name: Pre-commit Terraform ${{ steps.minMax.outputs.maxVersion }}
-        uses: clowdhaus/terraform-composite-actions/pre-commit@v1.11.1
+        uses: clowdhaus/terraform-composite-actions/pre-commit@v1.14.0
         with:
           terraform-version: ${{ steps.minMax.outputs.maxVersion }}
           tflint-version: ${{ env.TFLINT_VERSION }}

.github/workflows/release.yml

@@ -20,18 +20,26 @@ jobs:
     if: github.repository_owner == 'terraform-aws-modules'
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           persist-credentials: false
           fetch-depth: 0
 
-      - name: Release
-        uses: cycjimmy/semantic-release-action@v4
+      - name: Set correct Node.js version
+        uses: actions/setup-node@v6
         with:
-          semantic_version: 23.0.2
-          extra_plugins: |
-            @semantic-release/changelog@6.0.3
-            @semantic-release/git@10.0.1
-            conventional-changelog-conventionalcommits@7.0.2
+          node-version: 24
+
+      - name: Install dependencies
+        run: |
+          npm install \
+            @semantic-release/changelog@6.0.3 \
+            @semantic-release/git@10.0.1 \
+            conventional-changelog-conventionalcommits@9.1.0
+
+      - name: Release
+        uses: cycjimmy/semantic-release-action@v5
+        with:
+          semantic_version: 25.0.0
         env:
           GITHUB_TOKEN: ${{ secrets.SEMANTIC_RELEASE_TOKEN }}

.github/workflows/stale-actions.yaml

@@ -7,7 +7,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v10
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}
           # Staling issues and PR's

.gitignore

@@ -1,13 +1,13 @@
 # Local .terraform directories
 **/.terraform/*
 
+# Terraform lockfile
+.terraform.lock.hcl
+
 # .tfstate files
 *.tfstate
 *.tfstate.*
 
-# terraform lockfile
-.terraform.lock.hcl
-
 # Crash log files
 crash.log
 
@@ -15,7 +15,6 @@ crash.log
 # password, private keys, and other secrets. These should not be part of version
 # control as they are data points which are potentially sensitive and subject
 # to change depending on the environment.
-#
 *.tfvars
 
 # Ignore override files as they are usually used to override resources locally and so
@@ -25,13 +24,16 @@ override.tf.json
 *_override.tf
 *_override.tf.json
 
-# Include override files you do wish to add to version control using negated pattern
-#
-# !example_override.tf
-
-# Include tfplan files to ignore the plan output of command: terraform plan -out=tfplan
-# example: *tfplan*
-
 # Ignore CLI configuration files
 .terraformrc
 terraform.rc
+
+# Lambda build artifacts
+builds/
+__pycache__/
+*.zip
+.tox
+
+# Local editors/macos files
+.DS_Store
+.idea

.pre-commit-config.yaml

@@ -1,8 +1,9 @@
 repos:
   - repo: https://github.com/antonbabenko/pre-commit-terraform
-    rev: v1.100.0
+    rev: v1.103.0
     hooks:
       - id: terraform_fmt
+      - id: terraform_wrapper_module_for_each
       - id: terraform_docs
         args:
           - '--args=--lockfile=false'

CHANGELOG.md

@@ -2,6 +2,26 @@
 
 All notable changes to this project will be documented in this file.
 
+## [4.2.1](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/compare/v4.2.0...v4.2.1) (2025-10-21)
+
+### Bug Fixes
+
+* Update CI workflow versions to latest ([#40](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/issues/40)) ([5deff22](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/commit/5deff22cf4c471ce824c016687c3b933cd8b783c))
+
+## [4.2.0](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/compare/v4.1.0...v4.2.0) (2025-10-14)
+
+
+### Features
+
+* Support `default_auth_scheme` ([#39](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/issues/39)) ([c2073a0](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/commit/c2073a031c947270dac3f17c7f76e2996cd1b5b1))
+
+## [4.1.0](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/compare/v4.0.0...v4.1.0) (2025-10-01)
+
+
+### Features
+
+* Add Terragrunt wrappers ([#38](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/issues/38)) ([33b43c7](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/commit/33b43c72abdad0b01655238d844e56dabca5e6d4))
+
 ## [4.0.0](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/compare/v3.2.1...v4.0.0) (2025-09-16)
 
 

README.md

@@ -63,13 +63,13 @@ Examples codified under the [`examples`](https://github.com/terraform-aws-module
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.5.7 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.15 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.15 |
 
 ## Modules
 
@@ -105,6 +105,7 @@ No modules.
 | <a name="input_db_cluster_identifier"></a> [db\_cluster\_identifier](#input\_db\_cluster\_identifier) | DB cluster identifier | `string` | `""` | no |
 | <a name="input_db_instance_identifier"></a> [db\_instance\_identifier](#input\_db\_instance\_identifier) | DB instance identifier | `string` | `""` | no |
 | <a name="input_debug_logging"></a> [debug\_logging](#input\_debug\_logging) | Whether the proxy includes detailed information about SQL statements in its logs | `bool` | `false` | no |
+| <a name="input_default_auth_scheme"></a> [default\_auth\_scheme](#input\_default\_auth\_scheme) | Default authentication scheme that the proxy uses for client connections to the proxy and connections from the proxy to the underlying database. Valid values are NONE and IAM\_AUTH. Defaults to NONE | `string` | `null` | no |
 | <a name="input_endpoints"></a> [endpoints](#input\_endpoints) | Map of DB proxy endpoints to create and their attributes | <pre>map(object({<br/>    name                   = optional(string)<br/>    vpc_subnet_ids         = list(string)<br/>    vpc_security_group_ids = optional(list(string))<br/>    target_role            = optional(string)<br/>    tags                   = optional(map(string), {})<br/>  }))</pre> | `{}` | no |
 | <a name="input_engine_family"></a> [engine\_family](#input\_engine\_family) | The kind of database engine that the proxy will connect to. Valid values are `MYSQL` or `POSTGRESQL` | `string` | `""` | no |
 | <a name="input_iam_policy_name"></a> [iam\_policy\_name](#input\_iam\_policy\_name) | The name of the role policy. If omitted, Terraform will assign a random, unique name | `string` | `""` | no |

examples/README.md

@@ -1,6 +1,8 @@
-# AWS RDS Proxy Terraform Examples
+# Examples
 
-- [IAM auth. w/ MySQL Aurora cluster](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/tree/master/examples/mysql-iam-cluster)
-- [IAM auth. w/ MySQL RDS instance](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/tree/master/examples/mysql-iam-instance)
-- [IAM auth. w/ PostgreSQL Aurora cluster](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/tree/master/examples/postgresql-iam-cluster)
-- [IAM auth. w/ PostgreSQL RDS instance](https://github.com/terraform-aws-modules/terraform-aws-rds-proxy/tree/master/examples/postgresql-iam-instance)
+Please note - the examples provided serve two primary means:
+
+1. Show users working examples of the various ways in which the module can be configured and features supported
+2. A means of testing/validating module changes
+
+Please do not mistake the examples provided as "best practices". It is up to users to consult the AWS service documentation for best practices, usage recommendations, etc.

examples/mysql-iam-cluster/README.md

@@ -31,13 +31,13 @@ An EC2 instance configuration has been provided for use in validating the exampl
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.5.7 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.15 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.15 |
 
 ## Modules
 

examples/mysql-iam-cluster/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 6.0"
+      version = ">= 6.15"
     }
   }
 }

examples/mysql-iam-instance/README.md

@@ -31,14 +31,14 @@ An EC2 instance configuration has been provided for use in validating the exampl
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.5.7 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.15 |
 | <a name="requirement_random"></a> [random](#requirement\_random) | >= 2.0 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.15 |
 | <a name="provider_random"></a> [random](#provider\_random) | >= 2.0 |
 
 ## Modules

examples/mysql-iam-instance/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 6.0"
+      version = ">= 6.15"
     }
     random = {
       source  = "hashicorp/random"

examples/postgresql-iam-cluster/README.md

@@ -31,13 +31,13 @@ An EC2 instance configuration has been provided for use in validating the exampl
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.5.7 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.15 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.15 |
 
 ## Modules
 

examples/postgresql-iam-cluster/main.tf

@@ -88,7 +88,7 @@ module "rds" {
 
   name            = local.name
   engine          = "aurora-postgresql"
-  engine_version  = "14.7"
+  engine_version  = "17.5"
   master_username = "root"
 
   # When using RDS Proxy w/ IAM auth - Database must be username/password auth, not IAM

examples/postgresql-iam-cluster/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 6.0"
+      version = ">= 6.15"
     }
   }
 }

examples/postgresql-iam-instance/README.md

@@ -31,14 +31,14 @@ An EC2 instance configuration has been provided for use in validating the exampl
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.5.7 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.15 |
 | <a name="requirement_random"></a> [random](#requirement\_random) | >= 2.0 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 6.15 |
 | <a name="provider_random"></a> [random](#provider\_random) | >= 2.0 |
 
 ## Modules

examples/postgresql-iam-instance/versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 6.0"
+      version = ">= 6.15"
     }
     random = {
       source  = "hashicorp/random"

main.tf

@@ -21,6 +21,7 @@ resource "aws_db_proxy" "this" {
   }
 
   debug_logging          = var.debug_logging
+  default_auth_scheme    = var.default_auth_scheme
   engine_family          = var.engine_family
   idle_client_timeout    = var.idle_client_timeout
   name                   = var.name

variables.tf

@@ -49,6 +49,12 @@ variable "debug_logging" {
   default     = false
 }
 
+variable "default_auth_scheme" {
+  description = "Default authentication scheme that the proxy uses for client connections to the proxy and connections from the proxy to the underlying database. Valid values are NONE and IAM_AUTH. Defaults to NONE"
+  type        = string
+  default     = null
+}
+
 variable "engine_family" {
   description = "The kind of database engine that the proxy will connect to. Valid values are `MYSQL` or `POSTGRESQL`"
   type        = string

versions.tf

@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 6.0"
+      version = ">= 6.15"
     }
   }
 }

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/rds-proxy/aws//wrappers"
+  # Alternative source:
+  # source = "git::git@github.com:terraform-aws-modules/terraform-aws-rds-proxy.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/rds-proxy/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 +1,52 @@
+module "wrapper" {
+  source = "../"
+
+  for_each = var.items
+
+  auth = try(each.value.auth, var.defaults.auth, {
+    default = {
+      auth_scheme = "SECRETS"
+    }
+  })
+  connection_borrow_timeout      = try(each.value.connection_borrow_timeout, var.defaults.connection_borrow_timeout, null)
+  create                         = try(each.value.create, var.defaults.create, true)
+  create_iam_policy              = try(each.value.create_iam_policy, var.defaults.create_iam_policy, true)
+  create_iam_role                = try(each.value.create_iam_role, var.defaults.create_iam_role, true)
+  db_cluster_identifier          = try(each.value.db_cluster_identifier, var.defaults.db_cluster_identifier, "")
+  db_instance_identifier         = try(each.value.db_instance_identifier, var.defaults.db_instance_identifier, "")
+  debug_logging                  = try(each.value.debug_logging, var.defaults.debug_logging, false)
+  default_auth_scheme            = try(each.value.default_auth_scheme, var.defaults.default_auth_scheme, null)
+  endpoints                      = try(each.value.endpoints, var.defaults.endpoints, {})
+  engine_family                  = try(each.value.engine_family, var.defaults.engine_family, "")
+  iam_policy_name                = try(each.value.iam_policy_name, var.defaults.iam_policy_name, "")
+  iam_role_description           = try(each.value.iam_role_description, var.defaults.iam_role_description, "")
+  iam_role_force_detach_policies = try(each.value.iam_role_force_detach_policies, var.defaults.iam_role_force_detach_policies, true)
+  iam_role_max_session_duration  = try(each.value.iam_role_max_session_duration, var.defaults.iam_role_max_session_duration, 43200)
+  iam_role_name                  = try(each.value.iam_role_name, var.defaults.iam_role_name, "")
+  iam_role_path                  = try(each.value.iam_role_path, var.defaults.iam_role_path, null)
+  iam_role_permissions_boundary  = try(each.value.iam_role_permissions_boundary, var.defaults.iam_role_permissions_boundary, null)
+  iam_role_tags                  = try(each.value.iam_role_tags, var.defaults.iam_role_tags, {})
+  idle_client_timeout            = try(each.value.idle_client_timeout, var.defaults.idle_client_timeout, 1800)
+  init_query                     = try(each.value.init_query, var.defaults.init_query, "")
+  kms_key_arns                   = try(each.value.kms_key_arns, var.defaults.kms_key_arns, [])
+  log_group_class                = try(each.value.log_group_class, var.defaults.log_group_class, null)
+  log_group_kms_key_id           = try(each.value.log_group_kms_key_id, var.defaults.log_group_kms_key_id, null)
+  log_group_retention_in_days    = try(each.value.log_group_retention_in_days, var.defaults.log_group_retention_in_days, 30)
+  log_group_tags                 = try(each.value.log_group_tags, var.defaults.log_group_tags, {})
+  manage_log_group               = try(each.value.manage_log_group, var.defaults.manage_log_group, true)
+  max_connections_percent        = try(each.value.max_connections_percent, var.defaults.max_connections_percent, 90)
+  max_idle_connections_percent   = try(each.value.max_idle_connections_percent, var.defaults.max_idle_connections_percent, 50)
+  name                           = try(each.value.name, var.defaults.name, "")
+  proxy_tags                     = try(each.value.proxy_tags, var.defaults.proxy_tags, {})
+  region                         = try(each.value.region, var.defaults.region, null)
+  require_tls                    = try(each.value.require_tls, var.defaults.require_tls, true)
+  role_arn                       = try(each.value.role_arn, var.defaults.role_arn, "")
+  session_pinning_filters        = try(each.value.session_pinning_filters, var.defaults.session_pinning_filters, [])
+  tags                           = try(each.value.tags, var.defaults.tags, {})
+  target_db_cluster              = try(each.value.target_db_cluster, var.defaults.target_db_cluster, false)
+  target_db_instance             = try(each.value.target_db_instance, var.defaults.target_db_instance, false)
+  use_policy_name_prefix         = try(each.value.use_policy_name_prefix, var.defaults.use_policy_name_prefix, false)
+  use_role_name_prefix           = try(each.value.use_role_name_prefix, var.defaults.use_role_name_prefix, false)
+  vpc_security_group_ids         = try(each.value.vpc_security_group_ids, var.defaults.vpc_security_group_ids, [])
+  vpc_subnet_ids                 = try(each.value.vpc_subnet_ids, var.defaults.vpc_subnet_ids, [])
+}

wrappers/outputs.tf

@@ -0,0 +1,5 @@
+output "wrapper" {
+  description = "Map of outputs of a wrapper."
+  value       = module.wrapper
+  # sensitive = false # No sensitive module output found
+}

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 +1,10 @@
+terraform {
+  required_version = ">= 1.5.7"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 6.15"
+    }
+  }
+}