add var.dd_tags to set tags on logs (#20)

* add `var.dd_tags` to set tags on logs

* Auto Format

Co-authored-by: cloudpossebot <11232728+cloudpossebot@users.noreply.github.com>

README.md

@@ -268,6 +268,7 @@ Available targets:
 | <a name="input_dd_artifact_filename"></a> [dd\_artifact\_filename](#input\_dd\_artifact\_filename) | The Datadog artifact filename minus extension | `string` | `"aws-dd-forwarder"` | no |
 | <a name="input_dd_forwarder_version"></a> [dd\_forwarder\_version](#input\_dd\_forwarder\_version) | Version tag of Datadog lambdas to use. https://github.com/DataDog/datadog-serverless-functions/releases | `string` | `"3.39.0"` | no |
 | <a name="input_dd_module_name"></a> [dd\_module\_name](#input\_dd\_module\_name) | The Datadog GitHub repository name | `string` | `"datadog-serverless-functions"` | no |
+| <a name="input_dd_tags"></a> [dd\_tags](#input\_dd\_tags) | A list of Datadog tags to apply to all logs forwarded to Datadog | `list(string)` | `[]` | no |
 | <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
 | <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br>   format = string<br>   labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
 | <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |

docs/terraform.md

@@ -79,6 +79,7 @@
 | <a name="input_dd_artifact_filename"></a> [dd\_artifact\_filename](#input\_dd\_artifact\_filename) | The Datadog artifact filename minus extension | `string` | `"aws-dd-forwarder"` | no |
 | <a name="input_dd_forwarder_version"></a> [dd\_forwarder\_version](#input\_dd\_forwarder\_version) | Version tag of Datadog lambdas to use. https://github.com/DataDog/datadog-serverless-functions/releases | `string` | `"3.39.0"` | no |
 | <a name="input_dd_module_name"></a> [dd\_module\_name](#input\_dd\_module\_name) | The Datadog GitHub repository name | `string` | `"datadog-serverless-functions"` | no |
+| <a name="input_dd_tags"></a> [dd\_tags](#input\_dd\_tags) | A list of Datadog tags to apply to all logs forwarded to Datadog | `list(string)` | `[]` | no |
 | <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
 | <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br>   format = string<br>   labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
 | <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |

main.tf

@@ -25,8 +25,9 @@ locals {
   dd_api_key_asm         = local.dd_api_key_resource == "asm" ? { DD_API_KEY_SECRET_ARN = local.dd_api_key_identifier } : {}
   dd_api_key_ssm         = local.dd_api_key_resource == "ssm" ? { DD_API_KEY_SSM_NAME = local.dd_api_key_identifier } : {}
   dd_site                = { DD_SITE = var.forwarder_lambda_datadog_host }
+  dd_tags                = { DD_TAGS = join(",", var.dd_tags) }
   lambda_debug           = var.forwarder_lambda_debug_enabled ? { DD_LOG_LEVEL = "debug" } : {}
-  lambda_env             = merge(local.dd_api_key_kms, local.dd_api_key_asm, local.dd_api_key_ssm, local.dd_site, local.lambda_debug)
+  lambda_env             = merge(local.dd_api_key_kms, local.dd_api_key_asm, local.dd_api_key_ssm, local.dd_site, local.lambda_debug, local.dd_tags)
 }
 
 # Log Forwarder, RDS Enhanced Forwarder, VPC Flow Log Forwarder

variables.tf

@@ -215,3 +215,9 @@ variable "forwarder_vpclogs_filter_pattern" {
   description = "Filter pattern for Lambda forwarder VPC Logs"
   default     = ""
 }
+
+variable "dd_tags" {
+  type        = list(string)
+  description = "A list of Datadog tags to apply to all logs forwarded to Datadog"
+  default     = []
+}