AWS Amazon EC2 Auto Scaling Policy

aws_autoscaling_policy (Terraform)

The Policy in Amazon EC2 Auto Scaling can be configured in Terraform with the resource name aws_autoscaling_policy. The following sections describe 3 examples of how to use the resource and its parameters.

Example Usage from GitHub

MiguelIsaza95/Ramup_nodejs_Infra

resource "aws_autoscaling_policy" "proxy_policy_up" {
  name                   = "proxy-scale-up"
  scaling_adjustment     = 2
  adjustment_type        = "ChangeInCapacity"
  policy_type            = "SimpleScaling"
  cooldown               = 300

MIsazaB95/Ramup_nodejs_Infra

resource "aws_autoscaling_policy" "proxy_policy_up" {
  name                   = "proxy-scale-up"
  scaling_adjustment     = 2
  adjustment_type        = "ChangeInCapacity"
  policy_type            = "SimpleScaling"
  cooldown               = 300

VernonCo/AWS_auto-scaling_swarm

resource "aws_autoscaling_policy" "hi-cpu-masters-policy" {
    name = format("%s-%s-hi-cpu-masters-policy",var.environment,var.namespace)
    autoscaling_group_name = aws_autoscaling_group.masters.name
    adjustment_type = "ChangeInCapacity"
    scaling_adjustment = "1"
    cooldown = "300"

Parameters

• adjustment_type optional - string
• arn optional computed - string
• autoscaling_group_name required - string
• cooldown optional - number
• estimated_instance_warmup optional - number
• id optional computed - string
• metric_aggregation_type optional computed - string
• min_adjustment_magnitude optional - number
• name required - string
• policy_type optional - string
• scaling_adjustment optional - number
• step_adjustment set block
  • metric_interval_lower_bound optional - string
  • metric_interval_upper_bound optional - string
  • scaling_adjustment required - number
• target_tracking_configuration list block
  • disable_scale_in optional - bool
  • target_value required - number
  • customized_metric_specification list block
    • metric_name required - string
    • namespace required - string
    • statistic required - string
    • unit optional - string
    • metric_dimension list block
      • name required - string
      • value required - string
  • predefined_metric_specification list block
    • predefined_metric_type required - string
    • resource_label optional - string

Explanation in Terraform Registry

Provides an AutoScaling Scaling Policy resource.

NOTE: You may want to omit desired_capacity attribute from attached aws_autoscaling_group when using autoscaling policies. It's good practice to pick either manual or dynamic (policy-based) scaling.

Tips: Best Practices for The Other AWS Amazon EC2 Auto Scaling Resources

In addition to the aws_launch_configuration, AWS Amazon EC2 Auto Scaling has the other resources that should be configured for security reasons. Please check some examples of those resources and precautions.

aws_launch_configuration

Check public IPs should be given to Auto Scaling instances

It is better to block public access on the Internet to them. It is better to avoid associating public IP addresses if this is unintentional.