fix(multi-runner): enable SSE by default for runner-binaries bucket (#3274)

Author: miyajan

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

@@ -148,7 +148,7 @@ module "multi-runner" {
 | <a name="input_role_path"></a> [role\_path](#input\_role\_path) | The path that will be added to the role; if not set, the environment name will be used. | `string` | `null` | no |
 | <a name="input_role_permissions_boundary"></a> [role\_permissions\_boundary](#input\_role\_permissions\_boundary) | Permissions boundary that will be added to the created role for the lambda. | `string` | `null` | no |
 | <a name="input_runner_additional_security_group_ids"></a> [runner\_additional\_security\_group\_ids](#input\_runner\_additional\_security\_group\_ids) | (optional) List of additional security groups IDs to apply to the runner | `list(string)` | `[]` | no |
-| <a name="input_runner_binaries_s3_sse_configuration"></a> [runner\_binaries\_s3\_sse\_configuration](#input\_runner\_binaries\_s3\_sse\_configuration) | Map containing server-side encryption configuration for runner-binaries S3 bucket. | `any` | `{}` | no |
+| <a name="input_runner_binaries_s3_sse_configuration"></a> [runner\_binaries\_s3\_sse\_configuration](#input\_runner\_binaries\_s3\_sse\_configuration) | Map containing server-side encryption configuration for runner-binaries S3 bucket. | `any` | <pre>{<br>  "rule": {<br>    "apply_server_side_encryption_by_default": {<br>      "sse_algorithm": "AES256"<br>    }<br>  }<br>}</pre> | no |
 | <a name="input_runner_binaries_s3_versioning"></a> [runner\_binaries\_s3\_versioning](#input\_runner\_binaries\_s3\_versioning) | Status of S3 versioning for runner-binaries S3 bucket. Once set to Enabled the change cannot be reverted via Terraform! | `string` | `"Disabled"` | no |
 | <a name="input_runner_binaries_syncer_lambda_timeout"></a> [runner\_binaries\_syncer\_lambda\_timeout](#input\_runner\_binaries\_syncer\_lambda\_timeout) | Time out of the binaries sync lambda in seconds. | `number` | `300` | no |
 | <a name="input_runner_binaries_syncer_lambda_zip"></a> [runner\_binaries\_syncer\_lambda\_zip](#input\_runner\_binaries\_syncer\_lambda\_zip) | File location of the binaries sync lambda zip file. | `string` | `null` | no |

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

@@ -323,7 +323,13 @@ variable "lambda_principals" {
 variable "runner_binaries_s3_sse_configuration" {
   description = "Map containing server-side encryption configuration for runner-binaries S3 bucket."
   type        = any
-  default     = {}
+  default = {
+    rule = {
+      apply_server_side_encryption_by_default = {
+        sse_algorithm = "AES256"
+      }
+    }
+  }
 }
 
 variable "runner_binaries_s3_versioning" {