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aws_ec2_instance resource

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Use the aws_ec2_instance InSpec audit resource to test properties of a single AWS EC2 instance.

Syntax

An aws_ec2_instance resource block declares the tests for a single AWS EC2 instance by either name or instance id.

describe aws_ec2_instance('i-01a2349e94458a507') do
  it { should exist }
end

describe aws_ec2_instance(name: 'my-instance') do
  it { should exist }
end

Parameters

One of either the EC2 instance’s ID or name must be be provided.

instance_id (required if name not provided)

The ID of the EC2 instance. This is in the format of i- followed by 8 or 17 hexadecimal characters. This can be passed either as a string or as an instance_id: 'value' key-value entry in a hash.

name (required if instance_id not provided)

If you have a Name tag applied to the EC2 instance, this can be used to lookup the instance. This must be passed as a name: 'value' key-value entry in a hash.

Properties

Property Description
state The current state of the EC2 Instance, for example ‘running’.
image_id The id of the AMI used to launch the instance.
role The IAM role attached to the instance.
launch_time The time the instance was launched.
availability_zone The availability zone of the instance.
security_groups A hash containing the security group ids and names associated with the instance.
security_group_ids The security group ids associated with the instance.
ebs_volumes A hash containing the names and ids of any EBS volumes associated with the instance.
tags A list of hashes with each key-value pair corresponding to an EC2 instance tag, e.g, [{:key=>"Name", :value=>"Testing Box"}, {:key=>"Environment", :value=>"Dev"}]
tags_hash A hash, with each key-value pair corresponding to an EC2 instance tag, e.g, {"Name"=>"Testing Box", "Environment"=>"Dev"}. This property is available in InSpec AWS resource pack version 1.12.0 onwards.

There are also additional properties available. For a comprehensive list, see the API reference documentation

Examples

Test that an EC2 instance is running

describe aws_ec2_instance(name: 'prod-database') do
  it { should be_running }
end

Test that an EC2 instance is using the correct AMI

describe aws_ec2_instance(name: 'my-instance') do
  its('image_id') { should eq 'ami-27a58d5c' }
end

Test that an EC2 instance has the correct tag

describe aws_ec2_instance('i-090c29e4f4c165b74') do
  its('tags') { should include(key: 'Contact', value: 'Gilfoyle') }
end

Test that an EC2 instance has the correct tag (using the tags_hash property)

describe aws_ec2_instance('i-090c29e4f4c165b74') do
  its('tags_hash') { should include('Contact' => 'Gilfoyle') }
  its('tags_hash') { should include('Contact') }                  # Regardless of the value
end

Test that an EC2 instance has no roles

describe aws_ec2_instance('i-090c29e4f4c165b74') do
  it { should_not have_roles }
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.

  it { should exist }

  it { should_not exist }

has_roles

Test if the EC2 instance has any roles associated with it.

Use should_not to test the entity does not have roles.

it { should have_roles }

it { should_not have_roles }

be_pending

The be_pending matcher tests if the described EC2 instance state is pending. This indicates that an instance is provisioning. This state should be temporary.

it { should be_pending }

be_running

The be_running matcher tests if the described EC2 instance state is running. This indicates the instance is fully operational from AWS’s perspective.

it { should be_running }

be_shutting_down

The be_shutting_down matcher tests if the described EC2 instance state is shutting-down. This indicates the instance has received a termination command and is in the process of being permanently halted and de-provisioned. This state should be temporary.

it { should be_shutting_down }

be_stopped

The be_stopped matcher tests if the described EC2 instance state is stopped. This indicates that the instance is suspended and may be started again.

it { should be_stopped }

be_stopping

The be_stopping matcher tests if the described EC2 instance state is stopping. This indicates that an AWS stop command has been issued, which will suspend the instance in an OS-unaware manner. This state should be temporary.

it { should be_stopping }

be_terminated

The be_terminated matcher tests if the described EC2 instance state is terminated. This indicates the instance is permanently halted and will be removed from the instance listing in a short period. This state should be temporary.

it { should be_terminated }

be_unknown

The be_unknown matcher tests if the described EC2 instance state is unknown. This indicates an error condition in the AWS management system. This state should be temporary.

it { should be_unknown }

AWS Permissions

Your Principal will need the ec2:DescribeInstances, and iam:GetInstanceProfile actions set to allow.

You can find detailed documentation at Actions, Resources, and Condition Keys for Amazon EC2, and Actions, Resources, and Condition Keys for Identity And Access Management.

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