Query: ec2_network_interface_unused

select
  network_interface_id as resource,
  case
    when status = 'available' and attached_instance_id is null then 'alarm'
    else 'ok'
  end as status,
  case
    when status = 'available' and attached_instance_id is null then title || ' not in use.'
    else title || ' in use.'
  end as reason
  
  , region, account_id
from
  aws_ec2_network_interface;