feat: Update default runtime from nodejs18.x to nodejs20.x (#3791)

Update default lambda runtime to Node20 (LTS).

- Updated tflint, fixed linting errors
- Drop old terraform version 1.3.x from CI

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: npalm

Diff for: .github/workflows/terraform.yml

@@ -46,17 +46,17 @@ jobs:
         run: apk add --no-cache tar
         continue-on-error: true
       - if: contains(matrix.terraform, '1.5.')
-        uses: actions/cache@v4
+        uses: actions/cache@ab5e6d0c87105b4c9c2047343972218f562e4319 # v4.0.1
         name: Cache TFLint plugin dir
         with:
           path: ~/.tflint.d/plugins
           key: tflint-${{ hashFiles('.tflint.hcl') }}
       - if: contains(matrix.terraform, '1.5.')
         name: Setup TFLint
-        uses: terraform-linters/setup-tflint@v4
+        uses: terraform-linters/setup-tflint@19a52fbac37dacb22a09518e4ef6ee234f2d4987 # v4.0.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-      - if: contains(matrix.terraform, '1.3.')
+      - if: contains(matrix.terraform, '1.5.')
         name: Run TFLint
         run: |
           tflint --init -c ${GITHUB_WORKSPACE}/.tflint.hcl
@@ -67,7 +67,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        terraform: [1.3.2, "latest"]
+        terraform: [1.5.6, "latest"]
         module:
           ["ami-housekeeper", "download-lambda", "multi-runner", "runner-binaries-syncer", "runners", "setup-iam-permissions", "ssm", "webhook"]
     defaults:

Diff for: .tflint.hcl

@@ -1,13 +1,11 @@
 config {
   format = "compact"
   module = true
-
-
 }
 
 plugin "aws" {
     enabled = true
-    version = "0.23.0"
+    version = "0.30.0"
     source  = "github.com/terraform-linters/tflint-ruleset-aws"
 }
 

Diff for: README.md

@@ -169,7 +169,7 @@ Talk to the forestkeepers in the `runners-channel` on Slack.
 | <a name="input_kms_key_arn"></a> [kms\_key\_arn](#input\_kms\_key\_arn) | Optional CMK Key ARN to be used for Parameter Store. This key must be in the current account. | `string` | `null` | no |
 | <a name="input_lambda_architecture"></a> [lambda\_architecture](#input\_lambda\_architecture) | AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86\_64' functions. | `string` | `"arm64"` | no |
 | <a name="input_lambda_principals"></a> [lambda\_principals](#input\_lambda\_principals) | (Optional) add extra principals to the role created for execution of the lambda, e.g. for local testing. | <pre>list(object({<br>    type        = string<br>    identifiers = list(string)<br>  }))</pre> | `[]` | no |
-| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs18.x"` | no |
+| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs20.x"` | no |
 | <a name="input_lambda_s3_bucket"></a> [lambda\_s3\_bucket](#input\_lambda\_s3\_bucket) | S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. | `string` | `null` | no |
 | <a name="input_lambda_security_group_ids"></a> [lambda\_security\_group\_ids](#input\_lambda\_security\_group\_ids) | List of security group IDs associated with the Lambda function. | `list(string)` | `[]` | no |
 | <a name="input_lambda_subnet_ids"></a> [lambda\_subnet\_ids](#input\_lambda\_subnet\_ids) | List of subnets in which the action runners will be launched, the subnets needs to be subnets in the `vpc_id`. | `list(string)` | `[]` | no |
@@ -217,7 +217,8 @@ Talk to the forestkeepers in the `runners-channel` on Slack.
 | <a name="input_runners_maximum_count"></a> [runners\_maximum\_count](#input\_runners\_maximum\_count) | The maximum number of runners that will be created. | `number` | `3` | no |
 | <a name="input_runners_scale_down_lambda_memory_size"></a> [runners\_scale\_down\_lambda\_memory\_size](#input\_runners\_scale\_down\_lambda\_memory\_size) | Memory size limit in MB for scale-down lambda. | `number` | `512` | no |
 | <a name="input_runners_scale_down_lambda_timeout"></a> [runners\_scale\_down\_lambda\_timeout](#input\_runners\_scale\_down\_lambda\_timeout) | Time out for the scale down lambda in seconds. | `number` | `60` | no |
-| <a name="input_runners_scale_up_Lambda_memory_size"></a> [runners\_scale\_up\_Lambda\_memory\_size](#input\_runners\_scale\_up\_Lambda\_memory\_size) | Memory size limit in MB for scale-up lambda. | `number` | `512` | no |
+| <a name="input_runners_scale_up_Lambda_memory_size"></a> [runners\_scale\_up\_Lambda\_memory\_size](#input\_runners\_scale\_up\_Lambda\_memory\_size) | Memory size limit in MB for scale-up lambda. | `number` | `null` | no |
+| <a name="input_runners_scale_up_lambda_memory_size"></a> [runners\_scale\_up\_lambda\_memory\_size](#input\_runners\_scale\_up\_lambda\_memory\_size) | Memory size limit in MB for scale-up lambda. | `number` | `512` | no |
 | <a name="input_runners_scale_up_lambda_timeout"></a> [runners\_scale\_up\_lambda\_timeout](#input\_runners\_scale\_up\_lambda\_timeout) | Time out for the scale up lambda in seconds. | `number` | `30` | no |
 | <a name="input_runners_ssm_housekeeper"></a> [runners\_ssm\_housekeeper](#input\_runners\_ssm\_housekeeper) | Configuration for the SSM housekeeper lambda. This lambda deletes token / JIT config from SSM.<br><br>  `schedule_expression`: is used to configure the schedule for the lambda.<br>  `enabled`: enable or disable the lambda trigger via the EventBridge.<br>  `lambda_memory_size`: lambda memery size limit.<br>  `lambda_timeout`: timeout for the lambda in seconds.<br>  `config`: configuration for the lambda function. Token path will be read by default from the module. | <pre>object({<br>    schedule_expression = optional(string, "rate(1 day)")<br>    enabled             = optional(bool, true)<br>    lambda_memory_size  = optional(number, 512)<br>    lambda_timeout      = optional(number, 60)<br>    config = object({<br>      tokenPath      = optional(string)<br>      minimumDaysOld = optional(number, 1)<br>      dryRun         = optional(bool, false)<br>    })<br>  })</pre> | <pre>{<br>  "config": {}<br>}</pre> | no |
 | <a name="input_scale_down_schedule_expression"></a> [scale\_down\_schedule\_expression](#input\_scale\_down\_schedule\_expression) | Scheduler expression to check every x for scale down. | `string` | `"cron(*/5 * * * ? *)"` | no |

Diff for: main.tf

@@ -124,8 +124,8 @@ module "ssm" {
 module "webhook" {
   source = "./modules/webhook"
   ssm_paths = {
-    root    = "${local.ssm_root_path}"
-    webhook = "${var.ssm_paths.webhook}"
+    root    = local.ssm_root_path
+    webhook = var.ssm_paths.webhook
   }
   prefix      = var.prefix
   tags        = local.tags
@@ -238,7 +238,7 @@ module "runners" {
   lambda_runtime                   = var.lambda_runtime
   lambda_architecture              = var.lambda_architecture
   lambda_zip                       = var.runners_lambda_zip
-  lambda_scale_up_memory_size      = var.runners_scale_up_Lambda_memory_size
+  lambda_scale_up_memory_size      = coalesce(var.runners_scale_up_Lambda_memory_size, var.runners_scale_up_lambda_memory_size)
   lambda_scale_down_memory_size    = var.runners_scale_down_lambda_memory_size
   lambda_timeout_scale_up          = var.runners_scale_up_lambda_timeout
   lambda_timeout_scale_down        = var.runners_scale_down_lambda_timeout

Diff for: modules/ami-housekeeper/README.md

@@ -105,7 +105,7 @@ No modules.
 | <a name="input_lambda_architecture"></a> [lambda\_architecture](#input\_lambda\_architecture) | AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86\_64' functions. | `string` | `"arm64"` | no |
 | <a name="input_lambda_memory_size"></a> [lambda\_memory\_size](#input\_lambda\_memory\_size) | Memory size linit in MB of the lambda. | `number` | `256` | no |
 | <a name="input_lambda_principals"></a> [lambda\_principals](#input\_lambda\_principals) | (Optional) add extra principals to the role created for execution of the lambda, e.g. for local testing. | <pre>list(object({<br>    type        = string<br>    identifiers = list(string)<br>  }))</pre> | `[]` | no |
-| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs18.x"` | no |
+| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs20.x"` | no |
 | <a name="input_lambda_s3_bucket"></a> [lambda\_s3\_bucket](#input\_lambda\_s3\_bucket) | S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. | `string` | `null` | no |
 | <a name="input_lambda_s3_key"></a> [lambda\_s3\_key](#input\_lambda\_s3\_key) | S3 key for syncer lambda function. Required if using S3 bucket to specify lambdas. | `string` | `null` | no |
 | <a name="input_lambda_s3_object_version"></a> [lambda\_s3\_object\_version](#input\_lambda\_s3\_object\_version) | S3 object version for syncer lambda function. Useful if S3 versioning is enabled on source bucket. | `string` | `null` | no |

Diff for: modules/ami-housekeeper/variables.tf

@@ -117,7 +117,7 @@ variable "lambda_s3_object_version" {
 variable "lambda_runtime" {
   description = "AWS Lambda runtime."
   type        = string
-  default     = "nodejs18.x"
+  default     = "nodejs20.x"
 }
 
 variable "lambda_architecture" {

Diff for: modules/multi-runner/README.md

@@ -137,7 +137,7 @@ module "multi-runner" {
 | <a name="input_kms_key_arn"></a> [kms\_key\_arn](#input\_kms\_key\_arn) | Optional CMK Key ARN to be used for Parameter Store. | `string` | `null` | no |
 | <a name="input_lambda_architecture"></a> [lambda\_architecture](#input\_lambda\_architecture) | AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86\_64' functions. | `string` | `"arm64"` | no |
 | <a name="input_lambda_principals"></a> [lambda\_principals](#input\_lambda\_principals) | (Optional) add extra principals to the role created for execution of the lambda, e.g. for local testing. | <pre>list(object({<br>    type        = string<br>    identifiers = list(string)<br>  }))</pre> | `[]` | no |
-| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs18.x"` | no |
+| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs20.x"` | no |
 | <a name="input_lambda_s3_bucket"></a> [lambda\_s3\_bucket](#input\_lambda\_s3\_bucket) | S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. | `string` | `null` | no |
 | <a name="input_lambda_security_group_ids"></a> [lambda\_security\_group\_ids](#input\_lambda\_security\_group\_ids) | List of security group IDs associated with the Lambda function. | `list(string)` | `[]` | no |
 | <a name="input_lambda_subnet_ids"></a> [lambda\_subnet\_ids](#input\_lambda\_subnet\_ids) | List of subnets in which the action runners will be launched, the subnets needs to be subnets in the `vpc_id`. | `list(string)` | `[]` | no |

Diff for: modules/multi-runner/variables.tf

@@ -309,7 +309,7 @@ variable "log_level" {
 variable "lambda_runtime" {
   description = "AWS Lambda runtime."
   type        = string
-  default     = "nodejs18.x"
+  default     = "nodejs20.x"
 }
 
 variable "lambda_architecture" {

Diff for: modules/runner-binaries-syncer/README.md

@@ -89,7 +89,7 @@ No modules.
 | <a name="input_lambda_architecture"></a> [lambda\_architecture](#input\_lambda\_architecture) | AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86\_64' functions. | `string` | `"arm64"` | no |
 | <a name="input_lambda_memory_size"></a> [lambda\_memory\_size](#input\_lambda\_memory\_size) | Memory size of the lambda. | `number` | `256` | no |
 | <a name="input_lambda_principals"></a> [lambda\_principals](#input\_lambda\_principals) | (Optional) add extra principals to the role created for execution of the lambda, e.g. for local testing. | <pre>list(object({<br>    type        = string<br>    identifiers = list(string)<br>  }))</pre> | `[]` | no |
-| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs18.x"` | no |
+| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs20.x"` | no |
 | <a name="input_lambda_s3_bucket"></a> [lambda\_s3\_bucket](#input\_lambda\_s3\_bucket) | S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. | `string` | `null` | no |
 | <a name="input_lambda_schedule_expression"></a> [lambda\_schedule\_expression](#input\_lambda\_schedule\_expression) | Scheduler expression for action runner binary syncer. | `string` | `"cron(27 * * * ? *)"` | no |
 | <a name="input_lambda_security_group_ids"></a> [lambda\_security\_group\_ids](#input\_lambda\_security\_group\_ids) | List of security group IDs associated with the Lambda function. | `list(string)` | `[]` | no |

Diff for: modules/runner-binaries-syncer/variables.tf

@@ -214,7 +214,7 @@ variable "lambda_principals" {
 variable "lambda_runtime" {
   description = "AWS Lambda runtime."
   type        = string
-  default     = "nodejs18.x"
+  default     = "nodejs20.x"
 }
 
 variable "lambda_architecture" {

Diff for: modules/runners/README.md

@@ -167,7 +167,7 @@ yarn run dist
 | <a name="input_key_name"></a> [key\_name](#input\_key\_name) | Key pair name | `string` | `null` | no |
 | <a name="input_kms_key_arn"></a> [kms\_key\_arn](#input\_kms\_key\_arn) | Optional CMK Key ARN to be used for Parameter Store. | `string` | `null` | no |
 | <a name="input_lambda_architecture"></a> [lambda\_architecture](#input\_lambda\_architecture) | AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86\_64' functions. | `string` | `"arm64"` | no |
-| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs18.x"` | no |
+| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs20.x"` | no |
 | <a name="input_lambda_s3_bucket"></a> [lambda\_s3\_bucket](#input\_lambda\_s3\_bucket) | S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. | `string` | `null` | no |
 | <a name="input_lambda_scale_down_memory_size"></a> [lambda\_scale\_down\_memory\_size](#input\_lambda\_scale\_down\_memory\_size) | Memory size limit in MB for scale down lambda. | `number` | `512` | no |
 | <a name="input_lambda_scale_up_memory_size"></a> [lambda\_scale\_up\_memory\_size](#input\_lambda\_scale\_up\_memory\_size) | Memory size limit in MB for scale-up lambda. | `number` | `512` | no |

Diff for: modules/runners/variables.tf

@@ -549,7 +549,7 @@ variable "disable_runner_autoupdate" {
 variable "lambda_runtime" {
   description = "AWS Lambda runtime."
   type        = string
-  default     = "nodejs18.x"
+  default     = "nodejs20.x"
 }
 
 variable "lambda_architecture" {

Diff for: modules/webhook/README.md

@@ -83,7 +83,7 @@ No modules.
 | <a name="input_kms_key_arn"></a> [kms\_key\_arn](#input\_kms\_key\_arn) | Optional CMK Key ARN to be used for Parameter Store. | `string` | `null` | no |
 | <a name="input_lambda_architecture"></a> [lambda\_architecture](#input\_lambda\_architecture) | AWS Lambda architecture. Lambda functions using Graviton processors ('arm64') tend to have better price/performance than 'x86\_64' functions. | `string` | `"arm64"` | no |
 | <a name="input_lambda_memory_size"></a> [lambda\_memory\_size](#input\_lambda\_memory\_size) | Memory size limit in MB for lambda. | `number` | `256` | no |
-| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs18.x"` | no |
+| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | AWS Lambda runtime. | `string` | `"nodejs20.x"` | no |
 | <a name="input_lambda_s3_bucket"></a> [lambda\_s3\_bucket](#input\_lambda\_s3\_bucket) | S3 bucket from which to specify lambda functions. This is an alternative to providing local files directly. | `string` | `null` | no |
 | <a name="input_lambda_security_group_ids"></a> [lambda\_security\_group\_ids](#input\_lambda\_security\_group\_ids) | List of security group IDs associated with the Lambda function. | `list(string)` | `[]` | no |
 | <a name="input_lambda_subnet_ids"></a> [lambda\_subnet\_ids](#input\_lambda\_subnet\_ids) | List of subnets in which the action runners will be launched, the subnets needs to be subnets in the `vpc_id`. | `list(string)` | `[]` | no |

Diff for: modules/webhook/variables.tf

@@ -151,7 +151,7 @@ variable "log_level" {
 variable "lambda_runtime" {
   description = "AWS Lambda runtime."
   type        = string
-  default     = "nodejs18.x"
+  default     = "nodejs20.x"
 }
 
 variable "aws_partition" {

Diff for: variables.deprecated.tf

@@ -1,3 +1,4 @@
+# tflint-ignore: terraform_unused_declarations
 variable "lambda_tracing_mode" {
   description = "DEPRECATED: Replaced by `tracing_config`."
   type        = string
@@ -9,6 +10,7 @@ variable "lambda_tracing_mode" {
   }
 }
 
+# tflint-ignore: terraform_unused_declarations
 variable "enable_event_rule_binaries_syncer" {
   description = "DEPRECATED: Replaced by `state_event_rule_binaries_syncer`."
   type        = bool
@@ -18,3 +20,11 @@ variable "enable_event_rule_binaries_syncer" {
     error_message = "DEPRECATED, Replaced by `state_event_rule_binaries_syncer`."
   }
 }
+
+
+# tflint-ignore: terraform_naming_convention
+variable "runners_scale_up_Lambda_memory_size" {
+  description = "Memory size limit in MB for scale-up lambda."
+  type        = number
+  default     = null
+}

Diff for: variables.tf

@@ -100,7 +100,7 @@ variable "runners_lambda_zip" {
   default     = null
 }
 
-variable "runners_scale_up_Lambda_memory_size" {
+variable "runners_scale_up_lambda_memory_size" {
   description = "Memory size limit in MB for scale-up lambda."
   type        = number
   default     = 512
@@ -694,7 +694,7 @@ variable "disable_runner_autoupdate" {
 variable "lambda_runtime" {
   description = "AWS Lambda runtime."
   type        = string
-  default     = "nodejs18.x"
+  default     = "nodejs20.x"
 }
 
 variable "lambda_architecture" {