aws_vpc

Use the aws_vpc InSpec audit resource to test properties of a single AWS Virtual Private Cloud (VPC).

To test properties of all or multiple VPCs, use the aws_vpcs resource.

A VPC is a networking construct that provides an isolated environment. A VPC is contained in a geographic region, but spans availability zones in that region. A VPC may have multiple subnets, internet gateways, and other networking resources. Computing resources–such as EC2 instances–reside on subnets within the VPC.

Each VPC is uniquely identified by its VPC ID. In addition, each VPC has a non-unique CIDR IP Address range (such as 10.0.0.0/16) which it manages.

Every AWS account has at least one VPC, the “default” VPC, in every region.


Syntax

An aws_vpc resource block identifies a VPC by id. If no VPC ID is provided, the default VPC is used.

# Find the default VPC
describe aws_vpc do
  it { should exist }
end

# Find a VPC by ID
describe aws_vpc('vpc-12345678') do
  it { should exist }
end

# Hash syntax for ID
describe aws_vpc(vpc_id: 'vpc-12345678') do
  it { should exist }
end


Examples

The following examples show how to use this InSpec audit resource.

Test that a VPC does not exist

describe aws_vpc('vpc-87654321') do
  it { should_not exist }
end

Test the CIDR of a named VPC

describe aws_vpc('vpc-87654321') do
  its('cidr_block') { should cmp '10.0.0.0/16' }
end


Properties

  • cidr_block, dhcp_options_id, state, vpc_id, instance_tenancy


Property Examples

cidr_block

The IPv4 address range that is managed by the VPC.

describe aws_vpc('vpc-87654321') do
  its('cidr_block') { should cmp '10.0.0.0/16' }
end

dhcp_options_id

The ID of the set of DHCP options associated with the VPC (or default if the default options are associated with the VPC).

describe aws_vpc do
  its ('dhcp_options_id') { should eq 'dopt-a94671d0' }
end

instance_tenancy

The allowed tenancy of instances launched into the VPC.

describe aws_vpc do
  its ('instance_tenancy') { should eq 'default' }
end

state

The state of the VPC (pending | available).

describe aws_vpc do
  its ('state') { should eq 'available' }
end

vpc_id

The ID of the VPC.

describe aws_vpc do
  its('vpc_id') { should eq 'vpc-87654321' }
end


Matchers

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

be_default

The test will pass if the identified VPC is the default VPC for the region.

describe aws_vpc('vpc-87654321') do
  it { should be_default }
end