Control: RDS DB instances with a low number connections per day should be reviewed

powerpipe control run aws_thrifty.control.rds_db_low_connection_count

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

with rds_db_usage as (
  select
    db_instance_identifier,
    round(sum(maximum)/count(maximum)) as avg_max,
    count(maximum) days
  from
    aws_rds_db_instance_metric_connections_daily
  where
    date_part('day', now() - timestamp) <= 30
  group by
    db_instance_identifier
)
select
  arn as resource,
  case
    when avg_max is null then 'error'
    when avg_max = 0 then 'alarm'
    when avg_max < $1 then 'info'
    else 'ok'
  end as status,
  case
    when avg_max is null then 'CloudWatch metrics not available for ' || title || '.'
    when avg_max = 0 then title || ' has not been connected to in the last ' || days || ' days.'
    else title || ' is averaging ' || avg_max || ' max connections/day in the last ' || days || ' days.'
  end as reason
  
  , region, account_id
from
  aws_rds_db_instance i
  left join rds_db_usage as u on u.db_instance_identifier = i.db_instance_identifier;