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aws_dynamodb_table resource

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Use the aws_dynamodb_table InSpec audit resource to test properties of a single DynamoDb Table.

Syntax

Ensure an DynamoDb Table exists.

describe aws_dynamodb_table(table_name: 'table-name') do
  it { should exist }
end

Parameters

table_name (required)

The table name used by this DynamoDb Table. This must be passed as a table_name: 'value' key-value entry in a hash.

Properties

Property Description
table_name The name of the DynamoDb Table.
table_status The status of the DynamoDb Table.
table_arn The Amazon Resource Names of the DynamoDb Table.
creation_date The date the DynamoDb Table was created. eg. 01/01/2019
number_of_decreases_today The number of provisioned throughput decreases for this table during this UTC calendar day.
write_capacity_units The maximum number of writes consumed per second before DynamoDb returns a ThrottlingException.
read_capacity_units The maximum number of strongly consistent reads consumed per second before DynamoDb returns a ThrottlingException.
item_count The number of entries in the DynamoDb Table.
attributes An array of attributes that describe the key schema for the table and indexes. This is returned as a hash. Each entry is composed of: attribute_name - The name of this key attribute. attribute_type - The datatype of the attribute : B - Boolean, N - Number, S - string
key_schema Specifies the attributes that make up the primary key for a table or an index. This is returned as a hash. The attributes in KeySchema must also be defined in the Attributes array. Each element in the KeySchemaElement array is composed of: attribute_name - The name of this key attribute. key_type - The role that the key attribute will assume: HASH - partition key, RANGE - sort key
global_secondary_indexes A list of global secondary indexes if there is any referenced on the selected table.

Examples

Ensure DynamoDb Table status is active

describe aws_dynamodb_table(table_name: 'table-name') do
  its('table_status') { should eq 'ACTIVE' }
end

Ensure DynamoDb Table has an attribute

describe aws_dynamodb_table(table_name: 'table-name') do
  its('attributes') { should_not be_empty }
  its('attributes') { should include({:attribute_name =>'table_field', :attribute_type =>'N'}) }
end

Ensure DynamoDb Table has a key_schema

describe aws_dynamodb_table(table_name: 'table-name') do
  its('key_schema') { should_not be_empty }
  its('key_schema') { should include({:attribute_name =>'table_field', :key_type =>'HASH'}) }
end

Ensure DynamoDb Table has the correct global secondary indexes set

aws_dynamodb_table(table_name: 'table-name').global_secondary_indexes.each do |global_sec_idx|
  describe global_sec_idx do
    its('index_name') { should eq 'TitleIndex' }
    its('index_status') { should eq 'ACTIVE' }
    its('key_schema') { should include({:attribute_name =>'Title', :key_type =>'HASH'}) }
    its('provisioned_throughput.write_capacity_units') { should cmp 10 }
    its('provisioned_throughput.read_capacity_units') { should cmp 10 }
    its('projection.projection_type') { should eq 'INCLUDE' }
  end
end

Matchers

This InSpec audit resource has the following special matchers. For a full list of available matchers, please visit our matchers page.

exist

The control will pass if the describe returns at least one result.

Use should_not to test the entity should not exist.

describe aws_dynamodb_table(table_name: 'table-name') do
  it { should exist }
end

describe aws_dynamodb_table(table_name: 'table-name') do
  it { should_not exist }
end

AWS Permissions

Your Principal will need the DynamoDB::DescribeTable action with Effect set to Allow.

You can find detailed documentation at Actions, Resources, and Condition Keys for Amazon Dynamodb.

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