158 lines
No EOL
5 KiB
HCL
158 lines
No EOL
5 KiB
HCL
resource "aws_launch_configuration" "launchconfiguration" {
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name_prefix = "maps-${var.environment}-${var.version}-"
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image_id = "${data.aws_ami.amazon_linux.id}"
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key_name = "${data.terraform_remote_state.mono_keypair.key_name}"
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iam_instance_profile = "${aws_iam_instance_profile.profile.name}"
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security_groups = ["${aws_security_group.this.id}",
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"${data.terraform_remote_state.mono_efs.ec2_security_group_id}"]
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instance_type = "${var.instance_type}"
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user_data = "${data.template_cloudinit_config.cloudinit.rendered}"
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ebs_optimized = false
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root_block_device {
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delete_on_termination = true
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volume_size = 50
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}
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lifecycle {
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create_before_destroy = true
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}
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}
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resource "aws_autoscaling_group" "autoscalinggroup" {
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vpc_zone_identifier = ["${data.terraform_remote_state.mono_vpc.sn_private_a_id}"]
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name = "${aws_launch_configuration.launchconfiguration.name}"
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launch_configuration = "${aws_launch_configuration.launchconfiguration.name}"
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max_size = 5
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desired_capacity = 1
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min_size = 1
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health_check_grace_period = 300
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health_check_type = "ELB"
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force_delete = true
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termination_policies = ["OldestInstance", "OldestLaunchConfiguration"]
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target_group_arns = ["${aws_alb_target_group.target_group_this.arn}"]
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enabled_metrics = ["GroupMinSize", "GroupMaxSize",
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"GroupDesiredCapacity", "GroupInServiceInstances",
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"GroupPendingInstances", "GroupStandbyInstances",
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"GroupTerminatingInstances", "GroupTotalInstances"]
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lifecycle {
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create_before_destroy = true
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}
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tag {
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key = "Name"
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value = "maps"
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propagate_at_launch = true
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}
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provisioner "local-exec" {
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# Wait until the number of "ok" instance status checks is equal to 1
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command = "sleep 15; \
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expected=2; \
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current=0; \
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retries=0; \
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instances=$(aws autoscaling describe-auto-scaling-groups \
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--auto-scaling-group-name "${aws_autoscaling_group.autoscalinggroup.name}" \
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--query 'AutoScalingGroups[*].Instances[*].InstanceId' --output text); \
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while [ "$current" -lt "$expected" ]; do \
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for i in $(echo $instances); do \
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check=$(aws elbv2 describe-target-health \
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--target-group-arn "${aws_alb_target_group.target_group_this.arn}" \
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--query "TargetHealthDescriptions[?Target.Id == '$i'].TargetHealth.State" --output text); \
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echo "$check"; \
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if [[ "$check" -eq "healthy" ]]; then \
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current="$(echo $((++current)))"; \
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else \
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current="$(echo $((--current)))"; \
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fi \
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done; \
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if [[ "$($current)" -eq "$expected" ]]; then \
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break; \
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else \
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current="0";
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retries="$((++retries))"
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fi; \
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if [[ "$retries" -eq "3" ]]; then \
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break;\
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fi
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done
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"
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}
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}
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#
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# Autoscaling policies
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#
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resource "aws_autoscaling_policy" "this-autoscale_group_policy_up_x1" {
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name = "maps-autoscale_group_policy_up_x1"
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scaling_adjustment = 1
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adjustment_type = "ChangeInCapacity"
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cooldown = 60
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autoscaling_group_name = "${aws_autoscaling_group.autoscalinggroup.name}"
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}
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resource "aws_autoscaling_policy" "this-autoscale_group_policy_down_x1" {
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name = "maps-autoscale_group_policy_down_x1"
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scaling_adjustment = -1
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adjustment_type = "ChangeInCapacity"
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cooldown = 60
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autoscaling_group_name = "${aws_autoscaling_group.autoscalinggroup.name}"
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}
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#
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# ASG alarms
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#
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resource "aws_cloudwatch_metric_alarm" "this-cpu_high_alarm" {
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alarm_name = "alarm-cpu-high-maps"
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alarm_description = "This alarm triggers when CPU load in Autoscaling group is high."
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metric_name = "CPUUtilization"
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namespace = "AWS/EC2"
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dimensions {
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AutoScalingGroupName = "${aws_autoscaling_group.autoscalinggroup.name}"
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}
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statistic = "Average"
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comparison_operator = "GreaterThanOrEqualToThreshold"
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evaluation_periods = "1"
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period = "60"
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threshold = "70"
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# Use autoscaling policy ARN as an alarm action here
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# Reference: http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html
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alarm_actions = [
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"${aws_autoscaling_policy.this-autoscale_group_policy_up_x1.arn}",
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]
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dimensions {
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AutoScalingGroupName = "${aws_autoscaling_group.autoscalinggroup.name}"
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}
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}
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resource "aws_cloudwatch_metric_alarm" "this-cpu_low_alarm" {
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alarm_name = "alarm-cpu-low-maps"
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alarm_description = "This alarm triggers when CPU load in Autoscaling group is low."
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metric_name = "CPUUtilization"
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namespace = "AWS/EC2"
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dimensions {
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AutoScalingGroupName = "${aws_autoscaling_group.autoscalinggroup.name}"
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}
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statistic = "Average"
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comparison_operator = "LessThanOrEqualToThreshold"
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evaluation_periods = "1"
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period = "60"
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threshold = "35"
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# Use autoscaling policy ARN as an alarm action here
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# Reference: http://docs.aws.amazon.com/general/latest/gr/aws-arns-and-namespaces.html
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alarm_actions = [
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"${aws_autoscaling_policy.this-autoscale_group_policy_down_x1.arn}",
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]
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dimensions {
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AutoScalingGroupName = "${aws_autoscaling_group.autoscalinggroup.name}"
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}
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} |