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aws_rds_cluster Resource

Use the aws_rds_cluster InSpec audit resource to test detailed properties of an individual RDS cluster.

RDS gives you access to the capabilities of a MySQL, MariaDB, PostgreSQL, Microsoft SQL Server, Oracle, or Amazon Aurora database server.

For additional information, including details on parameters and properties, see the AWS documentation on RDS cluster.


This resource is available in the Chef InSpec AWS resource pack.

For information on configuring your AWS environment for Chef InSpec and creating an InSpec profile that uses the InSpec AWS resource pack, see the Chef InSpec documentation on the AWS cloud platform.


An aws_rds_cluster resource block uses resource parameters to search for an RDS cluster, and then tests that RDS cluster. If no RDS clusters match, no error is raised, but the exists matcher will return false and all properties will be nil. If more than one RDS cluster matches (due to vague search parameters), an error is raised.

describe aws_rds_cluster('test-cluster-id') do
  it { should exist }
# Can also use hash syntax
describe aws_rds_cluster(db_cluster_identifier: 'test-cluster-id') do
  it { should exist }


db_cluster_identifier (required)

This resource accepts a single parameter, the user-supplied cluster identifier. This parameter isn’t case-sensitive. This can be passed either as a string or as a db_cluster_identifier: 'value' key-value entry in a hash.


For a comprehensive list of properties available to test on an RDS cluster see the AWS Response Object.


Test the engine used with an RDS cluster.

describe aws_rds_cluster(db_cluster_identifier: 'awsrds123') do
  its('engine')         { should eq 'mysql' }
  its('engine_version') { should eq '5.6.37' }

Test the storage allocated to an RDS cluster.

describe aws_rds_cluster(db_cluster_identifier: 'awsrds123') do
  its('storage_encrypted') { should eq true }
  its('allocated_storage') { should eq 10 }

Test the cluster status and master username.

describe aws_rds_cluster(db_cluster_identifier: 'awsrds123') do
  its('master_username') { should eq 'db-maintain' }
  its('status') { should eq 'available' }

Test the maximum and minimum capacity of a serverless RDS cluster.

describe aws_rds_cluster(db_cluster_identifier: 'awsrds123') do
  its('scaling_configuration_info.min_capacity') { should eq 2 }
  its('scaling_configuration_info.max_capacity') { should eq 64 }


For a full list of available matchers, see our Universal Matchers page.

This resource has the following special matchers.


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

Use should_not to test the entity should not exist.

describe aws_rds_cluster(db_cluster_identifier: 'AnExistingRDS') do
  it { should exist }
describe aws_rds_cluster(db_cluster_identifier: 'ANonExistentRDS') do
  it { should_not exist }

AWS Permissions

Your Principal will need the RDS:Client:DBClusterMessage action with Effect set to Allow.

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

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