README.md

ECS Lambda container draining

When running ECS agent on EC2 inside an autoscaling group, ECS does not automatically detect and handle scale-down events.

This module creates the lambda and an SNS topic that you can plug as a lifecycle hook of your autoscaling group (on autoscaling:EC2_INSTANCE_TERMINATING) to set the instance as DRAINING (thus preventing new task from being run on this instance and moving tasks to non-draining hosts).

This module is intended to be used with the cluster module but can be directly used with an existing autoscaling group.

This project is inspired by this repo but implements it in Terraform.

Usage Example

module "ecs_lambda" {
  source = "github.com/MakeMeReach/terraform-aws-ecs//lambda_ecs_draining"

  name = "lambda"
  tags_as_map = {
    Hello = "World"
    This = "is_a_tag"
  }
}