Detect & correct EC2 network load balancers if unused

Amazon EC2 network load balancers with no targets attached still cost money and should be deleted. This query trigger identifies EC2 network load balancers with no targets attached and either sends notifications or attempts predefined corrective actions.

Getting Started

By default, this trigger is disabled, but can be configured by setting the variables:

ec2_network_load_balancers_if_unused_trigger_enabled should be set to true (default is false).
ec2_network_load_balancers_if_unused_trigger_schedule should be set according to your desired running schedule.
ec2_network_load_balancers_if_unused_default_action should be set to "notify" or any other desired action (e.g., "notify" for notifications or "delete_load_balancer" to delete the network load balancers).

Then starting the server:

flowpipe server

or if you've set the variables in a .fpvars file:

flowpipe server --var-file=/path/to/your.fpvars

Pipeline

Correct EC2 network load balancers if unused

Query

with target_resource as (
  select
    load_balancer_arn,
    target_health_descriptions,
    target_type
  from
    aws_ec2_target_group,
    jsonb_array_elements_text(load_balancer_arns) as load_balancer_arn
)
select
  concat(a.name, ' [', a.region, '/', a.account_id, ']') as title,
  a.arn,
  a.region,
  a._ctx ->> 'connection_name' as cred
from
  aws_ec2_network_load_balancer a
  left join target_resource b on a.arn = b.load_balancer_arn
where
  jsonb_array_length(b.target_health_descriptions) = 0

Schedule

15m