Query: elb_classic_lb_no_registered_instance

select
  arn as resource,
  case
    when jsonb_array_length(instances) = 0 then 'alarm'
    else 'ok'
  end as status,
  title || ' has ' || jsonb_array_length(instances) || ' instance(s) registered.' as reason,
  region,
  account_id
from
  aws_ec2_classic_load_balancer;