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Add autoscaling policy and create ami_data module

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mr-vercetti
2022-08-26 13:10:48 +02:00
parent 9cef061162
commit 92afe542a3
7 changed files with 110 additions and 67 deletions
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72
modules/app/main.tf
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@ -50,12 +50,12 @@ data "template_file" "bootstrap" {
resource "aws_launch_configuration" "this" {
name = "demo-app-launch-configuration"
image_id = var.EC2_IMAGE_ID
image_id = var.EC2_AMI
instance_type = var.EC2_TYPE
key_name = var.EC2_KEY_NAME
key_name = var.EC2_KEY_NAME
security_groups = [aws_security_group.this.id]
user_data = data.template_file.bootstrap.rendered
user_data = data.template_file.bootstrap.rendered
lifecycle {
create_before_destroy = true
@ -65,8 +65,8 @@ resource "aws_launch_configuration" "this" {
resource "aws_autoscaling_group" "this" {
name = "demo-app-autoscaling-group"
min_size = var.ASG_MIN_SIZE
max_size = var.ASG_MAX_SIZE
min_size = var.ASG_MIN_SIZE
max_size = var.ASG_MAX_SIZE
launch_configuration = aws_launch_configuration.this.name
vpc_zone_identifier = var.VPC_SUBNETS_IDS
@ -80,10 +80,62 @@ resource "aws_autoscaling_group" "this" {
}
}
resource "aws_autoscaling_policy" "this" {
name = "demo-app-autoscaling-policy"
scaling_adjustment = 1
adjustment_type = "ChangeInCapacity"
cooldown = 300
# asg scale up policy
resource "aws_autoscaling_policy" "cpu-policy" {
name = "demo-app-cpu-policy"
autoscaling_group_name = aws_autoscaling_group.this.name
adjustment_type = "ChangeInCapacity"
scaling_adjustment = "1"
cooldown = "300"
policy_type = "SimpleScaling"
}
resource "aws_cloudwatch_metric_alarm" "cpu-alarm" {
alarm_name = "cpu-alarm"
alarm_description = "cpu-alarm"
comparison_operator = "GreaterThanOrEqualToThreshold"
evaluation_periods = "2"
metric_name = "CPUUtilization"
namespace = "AWS/EC2"
period = "120"
statistic = "Average"
threshold = "30"
dimensions = {
"AutoScalingGroupName" = "${aws_autoscaling_group.this.name}"
}
actions_enabled = true
alarm_actions = ["${aws_autoscaling_policy.cpu-policy.arn}"]
}
# asg scale down policy
resource "aws_autoscaling_policy" "cpu-policy-scaledown" {
name = "demo-app-cpu-policy-scaledown"
autoscaling_group_name = aws_autoscaling_group.this.name
adjustment_type = "ChangeInCapacity"
scaling_adjustment = "-1"
cooldown = "300"
policy_type = "SimpleScaling"
}
resource "aws_cloudwatch_metric_alarm" "cpu-alarm-scaledown" {
alarm_name = "cpu-alarm-scaledown"
alarm_description = "cpu-alarm-scaledown"
comparison_operator = "LessThanOrEqualToThreshold"
evaluation_periods = "2"
metric_name = "CPUUtilization"
namespace = "AWS/EC2"
period = "120"
statistic = "Average"
threshold = "5"
dimensions = {
"AutoScalingGroupName" = "${aws_autoscaling_group.this.name}"
}
actions_enabled = true
alarm_actions = ["${aws_autoscaling_policy.cpu-policy-scaledown.arn}"]
}

2
modules/app/variables.tf
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@ -8,7 +8,7 @@ variable "VPC_SUBNETS_IDS" {
}
# EC2
variable "EC2_IMAGE_ID" {
variable "EC2_AMI" {
type = string
}