aws_auto_scaling_group Resource

Use the aws_auto_scaling_group InSpec audit resource to test properties of a single AWS Auto Scaling group.

For additional information, including details on parameters and properties, see the AWS documentation on Auto Scaling Group.

Installation

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

See the Chef InSpec documentation on cloud platforms for information on configuring your AWS environment for InSpec and creating an InSpec profile that uses the InSpec AWS resource pack.

Syntax

Ensure that an auto scaling group exists and has the correct scale sizes

describe aws_auto_scaling_group('MyAutoScalingGroup') do
  it              { should exist }
  its('min_size') { should be 1}
  its('max_size') { should be 4}
end  

You may also use hash syntax to pass the auto scaling group name

describe aws_auto_scaling_group(name: 'MyAutoScalingGroup') do
  it { should exist }
end

Parameters

name (required)

This resource accepts a single parameter, the Auto Scaling Group Name which uniquely identifies the auto scaling group. This can be passed either as a string or as a name: 'value' key-value entry in a hash.

Properties

min_size

An integer indicating the minimum number of instances in the auto scaling group.

maximum_size

An integer indicating the maximum number of instances in the auto scaling group.

desired_capacity

An integer indicating the desired number of instances in the auto scaling group.

launch_configuration_name

The name of the auto scaling launch configuration associated with the auto scaling group.

vpc_zone_identifier

An array of strings corresponding to the subnet IDs associated with the auto scaling group.

tags

An hash with each key-value pair corresponding to a tag associated with the entity.

Examples

Ensure that an auto scaling group has the correct desired capacity.

describe aws_auto_scaling_group('MyAutoScalingGroup') do
  it                      { should exist }
  its('desired_capacity') { should be 2 }
end  

Ensure that an auto scaling group has the correct Launch Configuration name and VPC identifier.

describe aws_auto_scaling_group('MyAutoScalingGroup') do
  it                               { should exist }
  its('launch_configuration_name') { should eq 'MyLaunchConfiguration'}
  its('vpc_zone_identifier')       { should include 'subnet-1234'}
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_auto_scaling_group('AnExistingASG') do
  it { should exist }
end

describe aws_auto_scaling_group('ANonExistentASG') do
  it { should_not exist }
end

AWS Permissions

Your Principal will need the AutoScaling:Client:AutoScalingGroupsType action with Effect set to Allow.

You can find detailed documentation at Actions, Resources, and Condition Keys for Amazon Auto Scaling Groups.