Control: Unused NAT gateways should be deleted

powerpipe control run aws_thrifty.control.vpc_nat_gateway_unused

powerpipe login
powerpipe control run aws_thrifty.control.vpc_nat_gateway_unused --share

select
  nat.arn as resource,
  case
    when nat.state <> 'available' then 'alarm'
    when sum(average) = 0 then 'alarm'
    else 'ok'
  end as status,
  case
    when nat.state <> 'available' then nat.title || ' in ' || nat.state || ' state.'
    when sum(average) = 0 then nat.title || ' not in-use.'
    else nat.title || ' in-use.'
  end as reason,
  nat.region,
  nat.account_id
from
  aws_vpc_nat_gateway as nat
  left join aws_vpc_nat_gateway_metric_bytes_out_to_destination as dest on nat.nat_gateway_id = dest.nat_gateway_id
group by
  nat.title,
  nat.arn,
  nat.state,
  nat.region,
  nat.account_id;