DynamoDB with non-recommended table billing mode

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Metadata

Id: cloudformation-aws-dynamodb-with-table-billing-mode-not-recommended

Provider: AWS

Platform: CloudFormation

Severity: Low

Category: Build Process

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Description

DynamoDB tables must explicitly specify a valid billing mode to ensure predictable capacity behavior and to avoid deploying tables with undefined or unexpected throughput that can impact availability. In CloudFormation, the BillingMode property on AWS::DynamoDB::Table must be set to either PROVISIONED or PAY_PER_REQUEST. Resources missing the BillingMode property or using any other value will be flagged. If you choose PROVISIONED, also configure appropriate provisioned throughput or auto-scaling. If you choose PAY_PER_REQUEST, do not define ProvisionedThroughput.

Secure example using on-demand (PAY_PER_REQUEST):

MyDynamoTable:
  Type: AWS::DynamoDB::Table
  Properties:
    TableName: my-table
    BillingMode: PAY_PER_REQUEST

Secure example using provisioned capacity:

MyDynamoTable:
  Type: AWS::DynamoDB::Table
  Properties:
    TableName: my-table
    BillingMode: PROVISIONED
    ProvisionedThroughput:
      ReadCapacityUnits: 5
      WriteCapacityUnits: 5

Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Resources:
  myDynamoDBTable:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
        -
          AttributeName: "Album"
          AttributeType: "S"
        -
          AttributeName: "Artist"
          AttributeType: "S"
      KeySchema:
        -
          AttributeName: "Album"
          KeyType: "HASH"
        -
          AttributeName: "Artist"
          KeyType: "RANGE"
      ProvisionedThroughput:
        ReadCapacityUnits: "5"
        WriteCapacityUnits: "5"
      TableName: "myTableName"
  myDynamoDBTable2:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
        -
          AttributeName: "Album"
          AttributeType: "S"
        -
          AttributeName: "Artist"
          AttributeType: "S"
      BillingMode: "PAY_PER_REQUEST"
      KeySchema:
        -
          AttributeName: "Album"
          KeyType: "HASH"
        -
          AttributeName: "Artist"
          KeyType: "RANGE"
      TableName: "myTableName"
  myDynamoDBTable3:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
        -
          AttributeName: "Album"
          AttributeType: "S"
        -
          AttributeName: "Artist"
          AttributeType: "S"
      BillingMode: "PROVISIONED"
      KeySchema:
        -
          AttributeName: "Album"
          KeyType: "HASH"
        -
          AttributeName: "Artist"
          KeyType: "RANGE"
      ProvisionedThroughput:
        ReadCapacityUnits: "5"
        WriteCapacityUnits: "5"
      TableName: "myTableName"

Non-Compliant Code Examples

AWSTemplateFormatVersion: "2010-09-09"
Resources:
  myDynamoDBTable:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
        -
          AttributeName: "Album"
          AttributeType: "S"
        -
          AttributeName: "Artist"
          AttributeType: "S"
      BillingMode: "PayPal"
      KeySchema:
        -
          AttributeName: "Album"
          KeyType: "HASH"
        -
          AttributeName: "Artist"
          KeyType: "RANGE"
      TableName: "myTableName"