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terraform-aws-datadog-lambda-forwarder

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Terraform module to provision all the necessary infrastructure to deploy Datadog Lambda forwarders

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Terraform module to provision all the necessary infrastructure to deploy [Datadog Lambda forwarders](https://github.com/DataDog/datadog-serverless-functions/tree/master/aws/logs_monitoring)

## Sponsorship

This project is supported by the [Datadog Open Source Program](https://www.datadoghq.com/partner/open-source/).

As part of this collaboration, Datadog provides a dedicated sandbox account that we use for automated integration and acceptance testing. This contribution allows us to continuously validate changes against a real Datadog environment, improving reliability and reducing the risk of regressions.

We are grateful to Datadog for supporting our open source ecosystem and helping ensure that infrastructure code for Terraform remains stable and well-tested
___

> [!TIP]
> #### 👽 Use Atmos with Terraform
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> Works with [Github Actions](https://atmos.tools/integrations/github-actions/), [Atlantis](https://atmos.tools/integrations/atlantis), or [Spacelift](https://atmos.tools/integrations/spacelift).
>
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> <summary>Watch demo of using Atmos with Terraform</summary>
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> Example of running <a href="https://atmos.tools"><code>atmos</code></a> to manage infrastructure from our <a href="https://atmos.tools/quick-start/">Quick Start</a> tutorial.
> </detalis>

## Usage

For a complete example, see [examples/complete](examples/complete).

For automated tests of the complete example using [bats](https://github.com/bats-core/bats-core) and [Terratest](https://github.com/gruntwork-io/terratest)
(which tests and deploys the example on AWS), see [test](test).

To enable Datadog forwarder for RDS Enhanced monitoring:
```hcl
module "datadog_lambda_forwarder" {
  source = "cloudposse/datadog-lambda-forwarder/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

forwarder_rds_enabled = true
}
```

To enable Datadog forwarder for a CloudTrail S3 bucket:
```hcl
module "datadog_lambda_forwarder" {
  source = "cloudposse/datadog-lambda-forwarder/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

forwarder_log_enabled = true
  s3_buckets            = ["cloudtrail-audit-bucket"]
  s3_bucket_kms_arns    = ["arn:aws:kms:us-west-2:1234567890:key/b204f3d2-1111-2222-94333332-4444ccc222"]
}
```

To enable Datadog forwarder for a S3 bucket with prefix:
```hcl
module "datadog_lambda_forwarder" {
  source = "cloudposse/datadog-lambda-forwarder/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

forwarder_log_enabled = true
  s3_buckets_with_prefixes = {
    MyBucketWithPrefix = {bucket_name = "my-bucket-with-prefix", bucket_prefix = "events/"}
    AnotherWithPrefix  = {bucket_name = "another-with-prefix", bucket_prefix = "records/"}
  }
  s3_bucket_kms_arns       = ["arn:aws:kms:us-west-2:1234567890:key/b204f3d2-1111-2222-94333332-4444ccc222"]
}
```

To enable Datadog forwarder for RDS authentication CloudWatch logs:
```hcl
module "datadog_lambda_forwarder" {
  source = "cloudposse/datadog-lambda-forwarder/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

forwarder_log_enabled = true
  cloudwatch_forwarder_log_groups = {
    postgres = {
      name           = "/aws/rds/cluster/pg-main/postgresql"
      filter_pattern = ""
    }
  }
}
```

To enable Datadog forwarder for VPC Flow Logs CloudWatch logs:
```hcl
module "datadog_lambda_forwarder" {
  source = "cloudposse/datadog-lambda-forwarder/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

forwarder_vpc_logs_enabled   = true
  vpclogs_cloudwatch_log_group = "/aws/vpc/flowlogs/vpc1"
}
```

To use a local copy of the lambda code you can specify the artifact url:
```hcl
module "datadog_lambda_forwarder" {
  source = "cloudposse/datadog-lambda-forwarder/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

forwarder_rds_enabled      = true
  forwarder_rds_artifact_url = file("${path.module}/function.zip")
}
```

> [!IMPORTANT]
> In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation
> and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version
> you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic
> approach for updating versions to avoid unexpected changes.

## Examples

Here is an example of using this module:
- [`examples/complete`](examples/complete) - complete example of using this module

## Requirements

| Name | Version |
|------|---------|
| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.3.0 |
| <a name="requirement_archive"></a> [archive](#requirement\_archive) | >= 2.2.0 |
| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 3.0 |

## Providers

| Name | Version |
|------|---------|
| <a name="provider_archive"></a> [archive](#provider\_archive) | >= 2.2.0 |
| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 3.0 |

## Modules

| Name | Source | Version |
|------|--------|---------|
| <a name="module_cloudwatch_event"></a> [cloudwatch\_event](#module\_cloudwatch\_event) | cloudposse/cloudwatch-events/aws | 0.10.0 |
| <a name="module_forwarder_log_artifact"></a> [forwarder\_log\_artifact](#module\_forwarder\_log\_artifact) | cloudposse/module-artifact/external | 0.8.0 |
| <a name="module_forwarder_log_label"></a> [forwarder\_log\_label](#module\_forwarder\_log\_label) | cloudposse/label/null | 0.25.0 |
| <a name="module_forwarder_log_s3_label"></a> [forwarder\_log\_s3\_label](#module\_forwarder\_log\_s3\_label) | cloudposse/label/null | 0.25.0 |
| <a name="module_forwarder_rds_artifact"></a> [forwarder\_rds\_artifact](#module\_forwarder\_rds\_artifact) | cloudposse/module-artifact/external | 0.8.0 |
| <a name="module_forwarder_rds_label"></a> [forwarder\_rds\_label](#module\_forwarder\_rds\_label) | cloudposse/label/null | 0.25.0 |
| <a name="module_forwarder_vpclogs_artifact"></a> [forwarder\_vpclogs\_artifact](#module\_forwarder\_vpclogs\_artifact) | cloudposse/module-artifact/external | 0.8.0 |
| <a name="module_forwarder_vpclogs_label"></a> [forwarder\_vpclogs\_label](#module\_forwarder\_vpclogs\_label) | cloudposse/label/null | 0.25.0 |
| <a name="module_tags_cache_s3_bucket"></a> [tags\_cache\_s3\_bucket](#module\_tags\_cache\_s3\_bucket) | cloudposse/s3-bucket/aws | 4.2.0 |
| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.25.0 |

## Resources

| Name | Type |
|------|------|
| [aws_cloudwatch_log_group.forwarder_log](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_group) | resource |
| [aws_cloudwatch_log_group.forwarder_rds](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_group) | resource |
| [aws_cloudwatch_log_group.forwarder_vpclogs](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_group) | resource |
| [aws_cloudwatch_log_subscription_filter.cloudwatch_log_subscription_filter](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_subscription_filter) | resource |
| [aws_cloudwatch_log_subscription_filter.datadog_log_subscription_filter_rds](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_subscription_filter) | resource |
| [aws_cloudwatch_log_subscription_filter.datadog_log_subscription_filter_vpclogs](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/cloudwatch_log_subscription_filter) | resource |
| [aws_iam_policy.datadog_custom_policy](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
| [aws_iam_policy.lambda_forwarder_log](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
| [aws_iam_policy.lambda_forwarder_log_s3](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
| [aws_iam_policy.lambda_forwarder_rds](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
| [aws_iam_policy.lambda_forwarder_vpclogs](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
| [aws_iam_role.lambda_forwarder_log](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role) | resource |
| [aws_iam_role.lambda_forwarder_rds](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role) | resource |
| [aws_iam_role.lambda_forwarder_vpclogs](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role) | resource |
| [aws_iam_role_policy_attachment.datadog_s3](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
| [aws_iam_role_policy_attachment.lambda_forwarder_log](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
| [aws_iam_role_policy_attachment.lambda_forwarder_rds](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
| [aws_iam_role_policy_attachment.lambda_forwarder_vpclogs](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_role_policy_attachment) | resource |
| [aws_lambda_function.forwarder_log](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_function) | resource |
| [aws_lambda_function.forwarder_rds](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_function) | resource |
| [aws_lambda_function.forwarder_vpclogs](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_function) | resource |
| [aws_lambda_permission.allow_eventbridge](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_permission) | resource |
| [aws_lambda_permission.allow_s3_bucket](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_permission) | resource |
| [aws_lambda_permission.cloudwatch_enhanced_rds_monitoring](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_permission) | resource |
| [aws_lambda_permission.cloudwatch_groups](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_permission) | resource |
| [aws_lambda_permission.cloudwatch_vpclogs](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/lambda_permission) | resource |
| [aws_s3_bucket_notification.s3_bucket_notification](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_notification) | resource |
| [aws_s3_bucket_notification.s3_bucket_notification_with_prefixes](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_notification) | resource |
| [archive_file.forwarder_rds](https://registry.terraform.io/providers/hashicorp/archive/latest/docs/data-sources/file) | data source |
| [archive_file.forwarder_vpclogs](https://registry.terraform.io/providers/hashicorp/archive/latest/docs/data-sources/file) | data source |
| [aws_caller_identity.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity) | data source |
| [aws_iam_policy_document.assume_role](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
| [aws_iam_policy_document.lambda_default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
| [aws_iam_policy_document.s3_log_bucket](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/iam_policy_document) | data source |
| [aws_partition.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/partition) | data source |
| [aws_region.current](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/region) | data source |
| [aws_ssm_parameter.api_key](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ssm_parameter) | data source |

## Inputs

| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`. This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
| <a name="input_api_key_ssm_arn"></a> [api\_key\_ssm\_arn](#input\_api\_key\_ssm\_arn) | ARN of the SSM parameter for the Datadog API key. Passing this removes the need to fetch the key from the SSM parameter store. This could be the case if the SSM Key is in a different region than the lambda. | `string` | `null` | no |
| <a name="input_attributes"></a> [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`, in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the `delimiter` and treated as a single ID element. | `list(string)` | `[]` | no |
| <a name="input_cloudwatch_forwarder_event_patterns"></a> [cloudwatch\_forwarder\_event\_patterns](#input\_cloudwatch\_forwarder\_event\_patterns) | Map of title => CloudWatch Event patterns to forward to Datadog. Event structure from here: <https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/CloudWatchEventsandEventPatterns.html#CloudWatchEventsPatterns> Example:<pre>hcl cloudwatch_forwarder_event_rules = { "guardduty" = { source = ["aws.guardduty"] detail-type = ["GuardDuty Finding"] } "ec2-terminated" = { source = ["aws.ec2"] detail-type = ["EC2 Instance State-change Notification"] detail = { state = ["terminated"] } } }</pre> | <pre>map(object({ version = optional(list(string)) id = optional(list(string)) detail-type = optional(list(string)) source = optional(list(string)) account = optional(list(string)) time = optional(list(string)) region = optional(list(string)) resources = optional(list(string)) detail = optional(map(list(string))) }))</pre> | `{}` | no |
| <a name="input_cloudwatch_forwarder_log_groups"></a> [cloudwatch\_forwarder\_log\_groups](#input\_cloudwatch\_forwarder\_log\_groups) | Map of CloudWatch Log Groups with a filter pattern that the Lambda forwarder will send logs from. For example: { mysql1 = { name = "/aws/rds/maincluster", filter\_pattern = "" } | <pre>map(object({ name = string filter_pattern = string }))</pre> | `{}` | no |
| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as `null` to use default value. Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{ "additional_tag_map": {}, "attributes": [], "delimiter": null, "descriptor_formats": {}, "enabled": true, "environment": null, "id_length_limit": null, "label_key_case": null, "label_order": [], "label_value_case": null, "labels_as_tags": [ "unset" ], "name": null, "namespace": null, "regex_replace_chars": null, "stage": null, "tags": {}, "tenant": null }</pre> | no |
| <a name="input_datadog_forwarder_lambda_environment_variables"></a> [datadog\_forwarder\_lambda\_environment\_variables](#input\_datadog\_forwarder\_lambda\_environment\_variables) | Map of environment variables to pass to the Lambda Function | `map(string)` | `{}` | no |
| <a name="input_dd_api_key_kms_ciphertext_blob"></a> [dd\_api\_key\_kms\_ciphertext\_blob](#input\_dd\_api\_key\_kms\_ciphertext\_blob) | CiphertextBlob stored in environment variable DD\_KMS\_API\_KEY used by the lambda function, along with the KMS key, to decrypt Datadog API key | `string` | `""` | no |
| <a name="input_dd_api_key_source"></a> [dd\_api\_key\_source](#input\_dd\_api\_key\_source) | One of: ARN for AWS Secrets Manager (asm) to retrieve the Datadog (DD) api key, ARN for the KMS (kms) key used to decrypt the ciphertext\_blob of the api key, or the name of the SSM (ssm) parameter used to retrieve the Datadog API key | <pre>object({ resource = string identifier = string })</pre> | <pre>{ "identifier": "", "resource": "" }</pre> | no |
| <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` | `"3.116.0"` | 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_dd_tags_map"></a> [dd\_tags\_map](#input\_dd\_tags\_map) | A map of Datadog tags to apply to all logs forwarded to Datadog. This will override dd\_tags. | `map(string)` | `{}` | no |
| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements. 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. Map of maps. Keys are names of descriptors. Values are maps of the form `{ format = string labels = list(string) }` (Type is `any` so the map values can later be enhanced to provide additional options.) `format` is a Terraform format string to be passed to the `format()` function. `labels` is a list of labels, in order, to pass to `format()` function. Label values will be normalized before being passed to `format()` so they will be identical to how they appear in `id`. 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 |
| <a name="input_environment"></a> [environment](#input\_environment) | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| <a name="input_forwarder_iam_path"></a> [forwarder\_iam\_path](#input\_forwarder\_iam\_path) | Path to the IAM roles and policies created | `string` | `"/"` | no |
| <a name="input_forwarder_lambda_datadog_host"></a> [forwarder\_lambda\_datadog\_host](#input\_forwarder\_lambda\_datadog\_host) | Datadog Site to send data to. Possible values are `datadoghq.com`, `datadoghq.eu`, `us3.datadoghq.com`, `us5.datadoghq.com` and `ddog-gov.com` | `string` | `"datadoghq.com"` | no |
| <a name="input_forwarder_lambda_debug_enabled"></a> [forwarder\_lambda\_debug\_enabled](#input\_forwarder\_lambda\_debug\_enabled) | Whether to enable or disable debug for the Lambda forwarder | `bool` | `false` | no |
| <a name="input_forwarder_log_artifact_url"></a> [forwarder\_log\_artifact\_url](#input\_forwarder\_log\_artifact\_url) | The URL for the code of the Datadog forwarder for Logs. It can be a local file, URL or git repo | `string` | `null` | no |
| <a name="input_forwarder_log_enabled"></a> [forwarder\_log\_enabled](#input\_forwarder\_log\_enabled) | Flag to enable or disable Datadog log forwarder | `bool` | `false` | no |
| <a name="input_forwarder_log_layers"></a> [forwarder\_log\_layers](#input\_forwarder\_log\_layers) | List of Lambda Layer Version ARNs (maximum of 5) to attach to Datadog log forwarder lambda function | `list(string)` | `[]` | no |
| <a name="input_forwarder_log_retention_days"></a> [forwarder\_log\_retention\_days](#input\_forwarder\_log\_retention\_days) | Number of days to retain Datadog forwarder lambda execution logs. One of [0 1 3 5 7 14 30 60 90 120 150 180 365 400 545 731 1827 3653] | `number` | `14` | no |
| <a name="input_forwarder_rds_artifact_url"></a> [forwarder\_rds\_artifact\_url](#input\_forwarder\_rds\_artifact\_url) | The URL for the code of the Datadog forwarder for RDS. It can be a local file, url or git repo | `string` | `null` | no |
| <a name="input_forwarder_rds_enabled"></a> [forwarder\_rds\_enabled](#input\_forwarder\_rds\_enabled) | Flag to enable or disable Datadog RDS enhanced monitoring forwarder | `bool` | `false` | no |
| <a name="input_forwarder_rds_filter_pattern"></a> [forwarder\_rds\_filter\_pattern](#input\_forwarder\_rds\_filter\_pattern) | Filter pattern for Lambda forwarder RDS | `string` | `""` | no |
| <a name="input_forwarder_rds_layers"></a> [forwarder\_rds\_layers](#input\_forwarder\_rds\_layers) | List of Lambda Layer Version ARNs (maximum of 5) to attach to Datadog RDS enhanced monitoring lambda function | `list(string)` | `[]` | no |
| <a name="input_forwarder_use_cache_bucket"></a> [forwarder\_use\_cache\_bucket](#input\_forwarder\_use\_cache\_bucket) | Flag to enable or disable the cache bucket for lambda tags and failed events. See https://docs.datadoghq.com/logs/guide/forwarder/?tab=cloudformation#upgrade-an-older-version-to-31060. Recommended for forwarder versions 3.106 and higher. | `bool` | `true` | no |
| <a name="input_forwarder_vpc_logs_artifact_url"></a> [forwarder\_vpc\_logs\_artifact\_url](#input\_forwarder\_vpc\_logs\_artifact\_url) | The URL for the code of the Datadog forwarder for VPC Logs. It can be a local file, url or git repo | `string` | `null` | no |
| <a name="input_forwarder_vpc_logs_enabled"></a> [forwarder\_vpc\_logs\_enabled](#input\_forwarder\_vpc\_logs\_enabled) | Flag to enable or disable Datadog VPC flow log forwarder | `bool` | `false` | no |
| <a name="input_forwarder_vpc_logs_layers"></a> [forwarder\_vpc\_logs\_layers](#input\_forwarder\_vpc\_logs\_layers) | List of Lambda Layer Version ARNs (maximum of 5) to attach to Datadog VPC flow log forwarder lambda function | `list(string)` | `[]` | no |
| <a name="input_forwarder_vpclogs_filter_pattern"></a> [forwarder\_vpclogs\_filter\_pattern](#input\_forwarder\_vpclogs\_filter\_pattern) | Filter pattern for Lambda forwarder VPC Logs | `string` | `""` | no |
| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6). Set to `0` for unlimited length. Set to `null` for keep the existing setting, which defaults to `0`. Does not affect `id_full`. | `number` | `null` | no |
| <a name="input_kms_key_id"></a> [kms\_key\_id](#input\_kms\_key\_id) | Optional KMS key ID to encrypt Datadog Lambda function logs | `string` | `null` | no |
| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | Controls the letter case of the `tags` keys (label names) for tags generated by this module. Does not affect keys of tags passed in via the `tags` input. Possible values: `lower`, `title`, `upper`. Default value: `title`. | `string` | `null` | no |
| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The order in which the labels (ID elements) appear in the `id`. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | `list(string)` | `null` | no |
| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`, set as tag values, and output by this module individually. Does not affect values of tags passed in via the `tags` input. Possible values: `lower`, `title`, `upper` and `none` (no transformation). Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs. Default value: `lower`. | `string` | `null` | no |
| <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output. Default is to include all labels. Tags with empty values will not be included in the `tags` output. Set to `[]` to suppress all generated tags. **Notes:** The value of the `name` tag, if included, will be the `id`, not the `name`. Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[ "default" ]</pre> | no |
| <a name="input_lambda_architectures"></a> [lambda\_architectures](#input\_lambda\_architectures) | Instruction set architecture for your Lambda function. Valid values are ["x86\_64"] and ["arm64"]. | `list(string)` | `null` | no |
| <a name="input_lambda_custom_policy_name"></a> [lambda\_custom\_policy\_name](#input\_lambda\_custom\_policy\_name) | Additional IAM policy document that can optionally be passed and merged with the created policy document | `string` | `"DatadogForwarderCustomPolicy"` | no |
| <a name="input_lambda_memory_size"></a> [lambda\_memory\_size](#input\_lambda\_memory\_size) | Amount of memory in MB your Lambda Function can use at runtime | `number` | `128` | no |
| <a name="input_lambda_policy_source_json"></a> [lambda\_policy\_source\_json](#input\_lambda\_policy\_source\_json) | Additional IAM policy document that can optionally be passed and merged with the created policy document | `string` | `""` | no |
| <a name="input_lambda_reserved_concurrent_executions"></a> [lambda\_reserved\_concurrent\_executions](#input\_lambda\_reserved\_concurrent\_executions) | Amount of reserved concurrent executions for the lambda function. A value of 0 disables Lambda from being triggered and -1 removes any concurrency limitations. Defaults to Unreserved Concurrency Limits -1 | `number` | `-1` | no |
| <a name="input_lambda_runtime"></a> [lambda\_runtime](#input\_lambda\_runtime) | Runtime environment for Datadog Lambda | `string` | `"python3.11"` | no |
| <a name="input_lambda_timeout"></a> [lambda\_timeout](#input\_lambda\_timeout) | Amount of time your Datadog Lambda Function has to run in seconds | `number` | `120` | no |
| <a name="input_log_permissions_boundary"></a> [log\_permissions\_boundary](#input\_log\_permissions\_boundary) | ARN of the policy that is used to set the permissions boundary for the lambda-log role managed by this module. | `string` | `null` | no |
| <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a `tag`. The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
| <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
| <a name="input_rds_permissions_boundary"></a> [rds\_permissions\_boundary](#input\_rds\_permissions\_boundary) | ARN of the policy that is used to set the permissions boundary for the lambda-rds role managed by this module. | `string` | `null` | no |
| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| <a name="input_s3_bucket_kms_arns"></a> [s3\_bucket\_kms\_arns](#input\_s3\_bucket\_kms\_arns) | List of KMS key ARNs for s3 bucket encryption | `list(string)` | `[]` | no |
| <a name="input_s3_buckets"></a> [s3\_buckets](#input\_s3\_buckets) | The names of S3 buckets to forward logs to Datadog | `list(string)` | `[]` | no |
| <a name="input_s3_buckets_with_prefixes"></a> [s3\_buckets\_with\_prefixes](#input\_s3\_buckets\_with\_prefixes) | The names S3 buckets and prefix to forward logs to Datadog | `map(object({ bucket_name : string, bucket_prefix : string }))` | `{}` | no |
| <a name="input_s3_notification_events"></a> [s3\_notification\_events](#input\_s3\_notification\_events) | List of S3 events to trigger the Lambda notification | `list(string)` | <pre>[ "s3:ObjectCreated:*" ]</pre> | no |
| <a name="input_security_group_ids"></a> [security\_group\_ids](#input\_security\_group\_ids) | List of security group IDs to use when the Lambda Function runs in a VPC | `list(string)` | `null` | no |
| <a name="input_stage"></a> [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| <a name="input_subnet_ids"></a> [subnet\_ids](#input\_subnet\_ids) | List of subnet IDs to use when deploying the Lambda Function in a VPC | `list(string)` | `null` | no |
| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`). Neither the tag keys nor the tag values will be modified by this module. | `map(string)` | `{}` | no |
| <a name="input_tenant"></a> [tenant](#input\_tenant) | ID element \_(Rarely used, not included by default)\_. A customer identifier, indicating who this instance of a resource is for | `string` | `null` | no |
| <a name="input_tracing_config_mode"></a> [tracing\_config\_mode](#input\_tracing\_config\_mode) | Can be either PassThrough or Active. If PassThrough, Lambda will only trace the request from an upstream service if it contains a tracing header with 'sampled=1'. If Active, Lambda will respect any tracing header it receives from an upstream service | `string` | `"PassThrough"` | no |
| <a name="input_vpc_logs_permissions_boundary"></a> [vpc\_logs\_permissions\_boundary](#input\_vpc\_logs\_permissions\_boundary) | ARN of the policy that is used to set the permissions boundary for the lambda-vpc-logs role managed by this module. | `string` | `null` | no |
| <a name="input_vpclogs_cloudwatch_log_group"></a> [vpclogs\_cloudwatch\_log\_group](#input\_vpclogs\_cloudwatch\_log\_group) | The name of the CloudWatch Log Group for VPC flow logs | `string` | `null` | no |

## Outputs

| Name | Description |
|------|-------------|
| <a name="output_lambda_forwarder_log_function_arn"></a> [lambda\_forwarder\_log\_function\_arn](#output\_lambda\_forwarder\_log\_function\_arn) | Datadog Lambda forwarder CloudWatch/S3 function ARN |
| <a name="output_lambda_forwarder_log_function_name"></a> [lambda\_forwarder\_log\_function\_name](#output\_lambda\_forwarder\_log\_function\_name) | Datadog Lambda forwarder CloudWatch/S3 function name |
| <a name="output_lambda_forwarder_rds_enhanced_monitoring_function_name"></a> [lambda\_forwarder\_rds\_enhanced\_monitoring\_function\_name](#output\_lambda\_forwarder\_rds\_enhanced\_monitoring\_function\_name) | Datadog Lambda forwarder RDS Enhanced Monitoring function name |
| <a name="output_lambda_forwarder_rds_function_arn"></a> [lambda\_forwarder\_rds\_function\_arn](#output\_lambda\_forwarder\_rds\_function\_arn) | Datadog Lambda forwarder RDS Enhanced Monitoring function ARN |
| <a name="output_lambda_forwarder_vpc_log_function_arn"></a> [lambda\_forwarder\_vpc\_log\_function\_arn](#output\_lambda\_forwarder\_vpc\_log\_function\_arn) | Datadog Lambda forwarder VPC Flow Logs function ARN |
| <a name="output_lambda_forwarder_vpc_log_function_name"></a> [lambda\_forwarder\_vpc\_log\_function\_name](#output\_lambda\_forwarder\_vpc\_log\_function\_name) | Datadog Lambda forwarder VPC Flow Logs function name |

## Related Projects

Check out these related projects.

- [terraform-null-label](https://github.com/cloudposse/terraform-null-label) - Terraform module designed to generate consistent names and tags for resources. Use terraform-null-label to implement a strict naming convention.

## References

For additional context, refer to some of these links.

- [Terraform Standard Module Structure](https://www.terraform.io/docs/modules/index.html#standard-module-structure) - HashiCorp's standard module structure is a file and directory layout we recommend for reusable modules distributed in separate repositories.
- [Terraform Module Requirements](https://www.terraform.io/docs/registry/modules/publish.html#requirements) - HashiCorp's guidance on all the requirements for publishing a module. Meeting the requirements for publishing a module is extremely easy.
- [Terraform `random_integer` Resource](https://registry.terraform.io/providers/hashicorp/random/latest/docs/resources/integer) - The resource random_integer generates random values from a given range, described by the min and max attributes of a given resource.
- [Terraform Version Pinning](https://www.terraform.io/docs/configuration/terraform.html#specifying-a-required-terraform-version) - The required_version setting can be used to constrain which versions of the Terraform CLI can be used with your configuration

> [!TIP]
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>
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> ✅ Your team owns everything. 
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>
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</details>

## ✨ Contributing

This project is under active development, and we encourage contributions from our community.

Many thanks to our outstanding contributors:

For 🐛 bug reports & feature requests, please use the [issue tracker](https://github.com/cloudposse/terraform-aws-datadog-lambda-forwarder/issues).

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
 1. Review our [Code of Conduct](https://github.com/cloudposse/terraform-aws-datadog-lambda-forwarder/?tab=coc-ov-file#code-of-conduct) and [Contributor Guidelines](https://github.com/cloudposse/.github/blob/main/CONTRIBUTING.md).
 2. **Fork** the repo on GitHub
 3. **Clone** the project to your own machine
 4. **Commit** changes to your own branch
 5. **Push** your work back up to your fork
 6. Submit a **Pull Request** so that we can review your changes

**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!

## Running Terraform Tests

We use [Atmos](https://atmos.tools) to streamline how Terraform tests are run. It centralizes configuration and wraps common test workflows with easy-to-use commands.

All tests are located in the [`test/`](test) folder.

Under the hood, tests are powered by Terratest together with our internal [Test Helpers](https://github.com/cloudposse/test-helpers) library, providing robust infrastructure validation.

Setup dependencies:
- Install Atmos ([installation guide](https://atmos.tools/install/))
- Install Go [1.24+ or newer](https://go.dev/doc/install)
- Install Terraform or OpenTofu

To run tests:

- Run all tests:  
  ```sh
  atmos test run
  ```
- Clean up test artifacts:  
  ```sh
  atmos test clean
  ```
- Explore additional test options:  
  ```sh
  atmos test --help
  ```
The configuration for test commands is centrally managed. To review what's being imported, see the [`atmos.yaml`](https://raw.githubusercontent.com/cloudposse/.github/refs/heads/main/.github/atmos/terraform-module.yaml) file.

Learn more about our [automated testing in our documentation](https://docs.cloudposse.com/community/contribute/automated-testing/) or implementing [custom commands](https://atmos.tools/core-concepts/custom-commands/) with atmos.

### 🌎 Slack Community

Join our [Open Source Community](https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-datadog-lambda-forwarder&utm_content=slack) on Slack. It's **FREE** for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally *sweet* infrastructure.

### 📰 Newsletter

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It's **FREE** for everyone!
## License

<details>
<summary>Preamble to the Apache License, Version 2.0</summary>

Complete license is available in the [`LICENSE`](LICENSE) file.

```text
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
```
</details>

## Trademarks

All other trademarks referenced herein are the property of their respective owners.

## Copyrights

terraform-aws-datadog-lambda-forwarder

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