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aws_auto_scaling_group resource

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

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.

See also the AWS documentation on Auto Scaling Group.

Properties

Property Description
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:Describe* actions with Effect set to Allow. You can find detailed documentation at Actions, Resources, and Condition Keys for Amazon Auto Scaling Groups.

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