Awesome

Terraform module to provision a DynamoDB table with autoscaling.

Autoscaler scales up/down the provisioned OPS for the DynamoDB table based on the load.

Requirements

This module requires AWS Provider >= 4.22.0

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Usage

For a complete example, see examples/complete.

For automated tests of the complete example using bats and Terratest (which tests and deploys the example on AWS), see test.

module "dynamodb_table" {
  source = "cloudposse/dynamodb/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  namespace                    = "eg"
  stage                        = "dev"
  name                         = "cluster"
  hash_key                     = "HashKey"
  range_key                    = "RangeKey"
  autoscale_write_target       = 50
  autoscale_read_target        = 50
  autoscale_min_read_capacity  = 5
  autoscale_max_read_capacity  = 20
  autoscale_min_write_capacity = 5
  autoscale_max_write_capacity = 20
  enable_autoscaler            = true
}

Advanced Usage

With additional attributes, global secondary indexes and non_key_attributes (see examples/complete).

module "dynamodb_table" {
  source = "cloudposse/dynamodb/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  namespace                    = "eg"
  stage                        = "dev"
  name                         = "cluster"
  hash_key                     = "HashKey"
  range_key                    = "RangeKey"
  autoscale_write_target       = 50
  autoscale_read_target        = 50
  autoscale_min_read_capacity  = 5
  autoscale_max_read_capacity  = 20
  autoscale_min_write_capacity = 5
  autoscale_max_write_capacity = 20
  enable_autoscaler            = true

  dynamodb_attributes = [
    {
      name = "DailyAverage"
      type = "N"
    },
    {
      name = "HighWater"
      type = "N"
    },
    {
      name = "Timestamp"
      type = "S"
    }
  ]

  local_secondary_index_map = [
    {
      name               = "TimestampSortIndex"
      range_key          = "Timestamp"
      projection_type    = "INCLUDE"
      non_key_attributes = ["HashKey", "RangeKey"]
    },
    {
      name               = "HighWaterIndex"
      range_key          = "Timestamp"
      projection_type    = "INCLUDE"
      non_key_attributes = ["HashKey", "RangeKey"]
    }
  ]

  global_secondary_index_map = [
    {
      name               = "DailyAverageIndex"
      hash_key           = "DailyAverage"
      range_key          = "HighWater"
      write_capacity     = 5
      read_capacity      = 5
      projection_type    = "INCLUDE"
      non_key_attributes = ["HashKey", "RangeKey"]
    }
  ]

  replicas = ["us-east-1"]
}

NOTE: Variables "global_secondary_index_map" and "local_secondary_index_map" have a predefined schema, but in some cases not all fields are required or needed.

For example:

non_key_attributes can't be specified for Global Secondary Indexes (GSIs) when projection_type is ALL
read_capacity and write_capacity are not required for GSIs

In these cases, set the fields to null and Terraform will treat them as if they were not provided at all, but will not complain about missing values:

  global_secondary_index_map = [
    {
      write_capacity     = null
      read_capacity      = null
      projection_type    = "ALL"
      non_key_attributes = null
    }
  ]

See Terraform types and values for more details.

[!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.

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Requirements

Name	Version
<a name="requirement_terraform"></a> terraform	>= 1.0.0
<a name="requirement_aws"></a> aws	>= 4.59
<a name="requirement_null"></a> null	>= 2.0

Providers

Name	Version
<a name="provider_aws"></a> aws	>= 4.59
<a name="provider_null"></a> null	>= 2.0

Modules

Name	Source	Version
<a name="module_dynamodb_autoscaler"></a> dynamodb_autoscaler	cloudposse/dynamodb-autoscaler/aws	0.16.0
<a name="module_this"></a> this	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_dynamodb_table.default	resource
null_resource.global_secondary_index_names	resource
null_resource.local_secondary_index_names	resource

Inputs

Name	Description	Type	Default	Required
<a name="input_additional_tag_map"></a> additional_tag_map	Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br/>This is for some rare cases where resources want additional configuration of tags<br/>and therefore take a list of maps with tag key, value, and additional configuration.	`map(string)`	`{}`	no
<a name="input_attributes"></a> attributes	ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br/>in the order they appear in the list. New attributes are appended to the<br/>end of the list. The elements of the list are joined by the `delimiter`<br/>and treated as a single ID element.	`list(string)`	`[]`	no
<a name="input_autoscale_max_read_capacity"></a> autoscale_max_read_capacity	DynamoDB autoscaling max read capacity	`number`	`20`	no
<a name="input_autoscale_max_write_capacity"></a> autoscale_max_write_capacity	DynamoDB autoscaling max write capacity	`number`	`20`	no
<a name="input_autoscale_min_read_capacity"></a> autoscale_min_read_capacity	DynamoDB autoscaling min read capacity	`number`	`5`	no
<a name="input_autoscale_min_write_capacity"></a> autoscale_min_write_capacity	DynamoDB autoscaling min write capacity	`number`	`5`	no
<a name="input_autoscale_read_target"></a> autoscale_read_target	The target value (in %) for DynamoDB read autoscaling	`number`	`50`	no
<a name="input_autoscale_write_target"></a> autoscale_write_target	The target value (in %) for DynamoDB write autoscaling	`number`	`50`	no
<a name="input_autoscaler_attributes"></a> autoscaler_attributes	Additional attributes for the autoscaler module	`list(string)`	`[]`	no
<a name="input_autoscaler_tags"></a> autoscaler_tags	Additional resource tags for the autoscaler module	`map(string)`	`{}`	no
<a name="input_billing_mode"></a> billing_mode	DynamoDB Billing mode. Can be PROVISIONED or PAY_PER_REQUEST	`string`	`"PROVISIONED"`	no
<a name="input_context"></a> context	Single object for setting entire context at once.<br/>See description of individual variables for details.<br/>Leave string and numeric variables as `null` to use default value.<br/>Individual variable settings (non-null) override settings in context object,<br/>except for attributes, tags, and additional_tag_map, which are merged.	`any`	<pre>{<br/> "additional_tag_map": {},<br/> "attributes": [],<br/> "delimiter": null,<br/> "descriptor_formats": {},<br/> "enabled": true,<br/> "environment": null,<br/> "id_length_limit": null,<br/> "label_key_case": null,<br/> "label_order": [],<br/> "label_value_case": null,<br/> "labels_as_tags": [<br/> "unset"<br/> ],<br/> "name": null,<br/> "namespace": null,<br/> "regex_replace_chars": null,<br/> "stage": null,<br/> "tags": {},<br/> "tenant": null<br/>}</pre>	no
<a name="input_deletion_protection_enabled"></a> deletion_protection_enabled	Enable/disable DynamoDB table deletion protection	`bool`	`false`	no
<a name="input_delimiter"></a> 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	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_dynamodb_attributes"></a> dynamodb_attributes	Additional DynamoDB attributes in the form of a list of mapped values	<pre>list(object({<br/> name = string<br/> type = string<br/> }))</pre>	`[]`	no
<a name="input_enable_autoscaler"></a> enable_autoscaler	Flag to enable/disable DynamoDB autoscaling	`bool`	`false`	no
<a name="input_enable_encryption"></a> enable_encryption	Enable DynamoDB server-side encryption	`bool`	`true`	no
<a name="input_enable_point_in_time_recovery"></a> enable_point_in_time_recovery	Enable DynamoDB point in time recovery	`bool`	`true`	no
<a name="input_enable_streams"></a> enable_streams	Enable DynamoDB streams	`bool`	`false`	no
<a name="input_enabled"></a> enabled	Set to false to prevent the module from creating any resources	`bool`	`null`	no
<a name="input_environment"></a> 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_global_secondary_index_map"></a> global_secondary_index_map	Additional global secondary indexes in the form of a list of mapped values	<pre>list(object({<br/> hash_key = string<br/> name = string<br/> non_key_attributes = list(string)<br/> projection_type = string<br/> range_key = string<br/> read_capacity = number<br/> write_capacity = number<br/> }))</pre>	`[]`	no
<a name="input_hash_key"></a> hash_key	DynamoDB table Hash Key	`string`	n/a	yes
<a name="input_hash_key_type"></a> hash_key_type	Hash Key type, which must be a scalar type: `S`, `N`, or `B` for (S)tring, (N)umber or (B)inary data	`string`	`"S"`	no
<a name="input_id_length_limit"></a> id_length_limit	Limit `id` to this many characters (minimum 6).<br/>Set to `0` for unlimited length.<br/>Set to `null` for keep the existing setting, which defaults to `0`.<br/>Does not affect `id_full`.	`number`	`null`	no
<a name="input_import_table"></a> import_table	Import Amazon S3 data into a new table.	<pre>object({<br/> # Valid values are GZIP, ZSTD and NONE<br/> input_compression_type = optional(string, null)<br/> # Valid values are CSV, DYNAMODB_JSON, and ION.<br/> input_format = string<br/> input_format_options = optional(object({<br/> csv = object({<br/> delimiter = string<br/> header_list = list(string)<br/> })<br/> }), null)<br/> s3_bucket_source = object({<br/> bucket = string<br/> bucket_owner = optional(string)<br/> key_prefix = optional(string)<br/> })<br/> })</pre>	`null`	no
<a name="input_label_key_case"></a> label_key_case	Controls the letter case of the `tags` keys (label names) for tags generated by this module.<br/>Does not affect keys of tags passed in via the `tags` input.<br/>Possible values: `lower`, `title`, `upper`.<br/>Default value: `title`.	`string`	`null`	no
<a name="input_label_order"></a> label_order	The order in which the labels (ID elements) appear in the `id`.<br/>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br/>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	Controls the letter case of ID elements (labels) as included in `id`,<br/>set as tag values, and output by this module individually.<br/>Does not affect values of tags passed in via the `tags` input.<br/>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br/>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br/>Default value: `lower`.	`string`	`null`	no
<a name="input_labels_as_tags"></a> labels_as_tags	Set of labels (ID elements) to include as tags in the `tags` output.<br/>Default is to include all labels.<br/>Tags with empty values will not be included in the `tags` output.<br/>Set to `[]` to suppress all generated tags.<br/>Notes:<br/> The value of the `name` tag, if included, will be the `id`, not the `name`.<br/> Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br/> changed in later chained modules. Attempts to change it will be silently ignored.	`set(string)`	<pre>[<br/> "default"<br/>]</pre>	no
<a name="input_local_secondary_index_map"></a> local_secondary_index_map	Additional local secondary indexes in the form of a list of mapped values	<pre>list(object({<br/> name = string<br/> non_key_attributes = list(string)<br/> projection_type = string<br/> range_key = string<br/> }))</pre>	`[]`	no
<a name="input_name"></a> name	ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br/>This is the only ID element not also included as a `tag`.<br/>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	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_range_key"></a> range_key	DynamoDB table Range Key	`string`	`""`	no
<a name="input_range_key_type"></a> range_key_type	Range Key type, which must be a scalar type: `S`, `N`, or `B` for (S)tring, (N)umber or (B)inary data	`string`	`"S"`	no
<a name="input_regex_replace_chars"></a> regex_replace_chars	Terraform regular expression (regex) string.<br/>Characters matching the regex will be removed from the ID elements.<br/>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_replicas"></a> replicas	List of regions to create replica	`list(string)`	`[]`	no
<a name="input_server_side_encryption_kms_key_arn"></a> server_side_encryption_kms_key_arn	The ARN of the CMK that should be used for the AWS KMS encryption. This attribute should only be specified if the key is different from the default DynamoDB CMK, alias/aws/dynamodb.	`string`	`null`	no
<a name="input_stage"></a> stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	`string`	`null`	no
<a name="input_stream_view_type"></a> stream_view_type	When an item in the table is modified, what information is written to the stream	`string`	`""`	no
<a name="input_table_class"></a> table_class	DynamoDB storage class of the table. Can be STANDARD or STANDARD_INFREQUENT_ACCESS	`string`	`"STANDARD"`	no
<a name="input_table_name"></a> table_name	Table name. If provided, the bucket will be created with this name instead of generating the name from the context	`string`	`null`	no
<a name="input_tags"></a> tags	Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).<br/>Neither the tag keys nor the tag values will be modified by this module.	`map(string)`	`{}`	no
<a name="input_tags_enabled"></a> tags_enabled	Set to `false` to disable tagging. This can be helpful if you're managing tables on dynamodb-local with terraform as it doesn't support tagging.	`bool`	`true`	no
<a name="input_tenant"></a> 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_ttl_attribute"></a> ttl_attribute	DynamoDB table TTL attribute	`string`	`"Expires"`	no
<a name="input_ttl_enabled"></a> ttl_enabled	Set to false to disable DynamoDB table TTL	`bool`	`true`	no

Outputs

Name	Description
<a name="output_global_secondary_index_names"></a> global_secondary_index_names	DynamoDB secondary index names
<a name="output_local_secondary_index_names"></a> local_secondary_index_names	DynamoDB local index names
<a name="output_table_arn"></a> table_arn	DynamoDB table ARN
<a name="output_table_id"></a> table_id	DynamoDB table ID
<a name="output_table_name"></a> table_name	DynamoDB table name
<a name="output_table_stream_arn"></a> table_stream_arn	DynamoDB table stream ARN
<a name="output_table_stream_label"></a> table_stream_label	DynamoDB table stream label

Related Projects

Check out these related projects.

terraform-aws-dynamodb-autoscaler - Terraform module to provision DynamoDB autoscaler
terraform-aws-tfstate-backend - Provision an S3 bucket to store terraform.tfstate file and a DynamoDB table to lock the state file to prevent concurrent modifications and state corruption
terraform-aws-elasticache-redis - Terraform module to provision an ElastiCache Redis Cluster
terraform-aws-elasticache-memcached - Terraform Module for ElastiCache Memcached Cluster
terraform-aws-elasticache-cloudwatch-sns-alarms - Terraform module that configures CloudWatch SNS alerts for ElastiCache
terraform-aws-rds-cluster - Terraform module to provision an RDS Aurora cluster for MySQL or Postgres
terraform-aws-rds - Terraform module to provision AWS RDS instances

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

Complete license is available in the LICENSE file.

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