terraform-aws-dynamodb

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 >= 1.17.0

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It's 100% Open Source and licensed under the APACHE2.

We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!

Security & Compliance

Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.

Benchmark	Description
	Infrastructure Security Compliance
	Center for Internet Security, KUBERNETES Compliance
	Center for Internet Security, AWS Compliance
	Center for Internet Security, AZURE Compliance
	Payment Card Industry Data Security Standards Compliance
	National Institute of Standards and Technology Compliance
	Information Security Management System, ISO/IEC 27001 Compliance
	Service Organization Control 2 Compliance
	Center for Internet Security, GCP Compliance
	Health Insurance Portability and Accountability Compliance

Usage

IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.

Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.

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.

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
terraform	>= 0.13.0
aws	>= 2.0
null	>= 2.0

Providers

Name	Version
aws	>= 2.0
null	>= 2.0

Modules

Name	Source	Version
dynamodb_autoscaler	cloudposse/dynamodb-autoscaler/aws	0.13.1
this	cloudposse/label/null	0.24.1

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
additional_tag_map	Additional tags for appending to tags_as_list_of_maps. Not added to tags.	map(string)	{}	no
attributes	Additional attributes (e.g. 1)	list(string)	[]	no
autoscale_max_read_capacity	DynamoDB autoscaling max read capacity	number	20	no
autoscale_max_write_capacity	DynamoDB autoscaling max write capacity	number	20	no
autoscale_min_read_capacity	DynamoDB autoscaling min read capacity	number	5	no
autoscale_min_write_capacity	DynamoDB autoscaling min write capacity	number	5	no
autoscale_read_target	The target value (in %) for DynamoDB read autoscaling	number	50	no
autoscale_write_target	The target value (in %) for DynamoDB write autoscaling	number	50	no
autoscaler_attributes	Additional attributes for the autoscaler module	list(string)	[]	no
autoscaler_tags	Additional resource tags for the autoscaler module	map(string)	{}	no
billing_mode	DynamoDB Billing mode. Can be PROVISIONED or PAY_PER_REQUEST	string	"PROVISIONED"	no
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	{ "additional_tag_map": {}, "attributes": [], "delimiter": null, "enabled": true, "environment": null, "id_length_limit": null, "label_key_case": null, "label_order": [], "label_value_case": null, "name": null, "namespace": null, "regex_replace_chars": null, "stage": null, "tags": {} }	no
delimiter	Delimiter to be used between namespace, environment, stage, name and attributes. Defaults to - (hyphen). Set to "" to use no delimiter at all.	string	null	no
dynamodb_attributes	Additional DynamoDB attributes in the form of a list of mapped values	list(object({ name = string type = string }))	[]	no
enable_autoscaler	Flag to enable/disable DynamoDB autoscaling	bool	false	no
enable_encryption	Enable DynamoDB server-side encryption	bool	true	no
enable_point_in_time_recovery	Enable DynamoDB point in time recovery	bool	true	no
enable_streams	Enable DynamoDB streams	bool	false	no
enabled	Set to false to prevent the module from creating any resources	bool	null	no
environment	Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'	string	null	no
global_secondary_index_map	Additional global secondary indexes in the form of a list of mapped values	list(object({ hash_key = string name = string non_key_attributes = list(string) projection_type = string range_key = string read_capacity = number write_capacity = number }))	[]	no
hash_key	DynamoDB table Hash Key	string	n/a	yes
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
id_length_limit	Limit id to this many characters (minimum 6). Set to 0 for unlimited length. Set to null for default, which is 0. Does not affect id_full.	number	null	no
label_key_case	The letter case of label keys (tag names) (i.e. name, namespace, environment, stage, attributes) to use in tags. Possible values: lower, title, upper. Default value: title.	string	null	no
label_order	The naming order of the id output and Name tag. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 5 elements, but at least one must be present.	list(string)	null	no
label_value_case	The letter case of output label values (also used in tags and id). Possible values: lower, title, upper and none (no transformation). Default value: lower.	string	null	no
local_secondary_index_map	Additional local secondary indexes in the form of a list of mapped values	list(object({ name = string non_key_attributes = list(string) projection_type = string range_key = string }))	[]	no
name	Solution name, e.g. 'app' or 'jenkins'	string	null	no
namespace	Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'	string	null	no
range_key	DynamoDB table Range Key	string	""	no
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
regex_replace_chars	Regex to replace chars with empty string in namespace, environment, stage and name. If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.	string	null	no
replicas	List of regions to create replica	list(string)	[]	no
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
stage	Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'	string	null	no
stream_view_type	When an item in the table is modified, what information is written to the stream	string	""	no
tags	Additional tags (e.g. map('BusinessUnit','XYZ')	map(string)	{}	no
ttl_attribute	DynamoDB table TTL attribute	string	"Expires"	no
ttl_enabled	Set to false to disable DynamoDB table TTL	bool	true	no

Outputs

Name	Description
global_secondary_index_names	DynamoDB secondary index names
local_secondary_index_names	DynamoDB local index names
table_arn	DynamoDB table ARN
table_id	DynamoDB table ID
table_name	DynamoDB table name
table_stream_arn	DynamoDB table stream ARN
table_stream_label	DynamoDB table stream label

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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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Copyright

Copyright © 2017-2021 Cloud Posse, LLC

License

See LICENSE for full details.

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

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Contributors

Erik Osterman	Andriy Knysh	Jamie Nelson	Daren Desjardins	Maarten van der Hoef