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workers_launch_template.tf
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# Worker Groups using Launch Templates
resource "aws_autoscaling_group" "workers_launch_template" {
name_prefix = "${aws_eks_cluster.this.name}-${lookup(var.worker_groups_launch_template[count.index], "name", count.index)}"
desired_capacity = "${lookup(var.worker_groups_launch_template[count.index], "asg_desired_capacity", local.workers_group_launch_template_defaults["asg_desired_capacity"])}"
max_size = "${lookup(var.worker_groups_launch_template[count.index], "asg_max_size", local.workers_group_launch_template_defaults["asg_max_size"])}"
min_size = "${lookup(var.worker_groups_launch_template[count.index], "asg_min_size", local.workers_group_launch_template_defaults["asg_min_size"])}"
force_delete = "${lookup(var.worker_groups_launch_template[count.index], "asg_force_delete", local.workers_group_launch_template_defaults["asg_force_delete"])}"
target_group_arns = ["${compact(split(",", coalesce(lookup(var.worker_groups_launch_template[count.index], "target_group_arns", ""), local.workers_group_launch_template_defaults["target_group_arns"])))}"]
mixed_instances_policy {
instances_distribution {
on_demand_allocation_strategy = "${lookup(var.worker_groups_launch_template[count.index], "on_demand_allocation_strategy", local.workers_group_launch_template_defaults["on_demand_allocation_strategy"])}"
on_demand_base_capacity = "${lookup(var.worker_groups_launch_template[count.index], "on_demand_base_capacity", local.workers_group_launch_template_defaults["on_demand_base_capacity"])}"
on_demand_percentage_above_base_capacity = "${lookup(var.worker_groups_launch_template[count.index], "on_demand_percentage_above_base_capacity", local.workers_group_launch_template_defaults["on_demand_percentage_above_base_capacity"])}"
spot_allocation_strategy = "${lookup(var.worker_groups_launch_template[count.index], "spot_allocation_strategy", local.workers_group_launch_template_defaults["spot_allocation_strategy"])}"
spot_instance_pools = "${lookup(var.worker_groups_launch_template[count.index], "spot_instance_pools", local.workers_group_launch_template_defaults["spot_instance_pools"])}"
spot_max_price = "${lookup(var.worker_groups_launch_template[count.index], "spot_max_price", local.workers_group_launch_template_defaults["spot_max_price"])}"
}
launch_template {
launch_template_specification {
launch_template_id = "${element(aws_launch_template.workers_launch_template.*.id, count.index)}"
version = "$Latest"
}
override {
instance_type = "${lookup(var.worker_groups_launch_template[count.index], "instance_type", local.workers_group_launch_template_defaults["instance_type"])}"
}
override {
instance_type = "${lookup(var.worker_groups_launch_template[count.index], "override_instance_type", local.workers_group_launch_template_defaults["override_instance_type"])}"
}
}
}
vpc_zone_identifier = ["${split(",", coalesce(lookup(var.worker_groups_launch_template[count.index], "subnets", ""), local.workers_group_launch_template_defaults["subnets"]))}"]
protect_from_scale_in = "${lookup(var.worker_groups_launch_template[count.index], "protect_from_scale_in", local.workers_group_launch_template_defaults["protect_from_scale_in"])}"
suspended_processes = ["${compact(split(",", coalesce(lookup(var.worker_groups_launch_template[count.index], "suspended_processes", ""), local.workers_group_launch_template_defaults["suspended_processes"])))}"]
enabled_metrics = ["${compact(split(",", coalesce(lookup(var.worker_groups_launch_template[count.index], "enabled_metrics", ""), local.workers_group_launch_template_defaults["enabled_metrics"])))}"]
count = "${var.worker_group_launch_template_count}"
tags = ["${concat(
list(
map("key", "Name", "value", "${aws_eks_cluster.this.name}-${lookup(var.worker_groups_launch_template[count.index], "name", count.index)}-eks_asg", "propagate_at_launch", true),
map("key", "kubernetes.io/cluster/${aws_eks_cluster.this.name}", "value", "owned", "propagate_at_launch", true),
map("key", "k8s.io/cluster-autoscaler/${lookup(var.worker_groups_launch_template[count.index], "autoscaling_enabled", local.workers_group_launch_template_defaults["autoscaling_enabled"]) == 1 ? "enabled" : "disabled" }", "value", "true", "propagate_at_launch", false),
map("key", "k8s.io/cluster-autoscaler/${aws_eks_cluster.this.name}", "value", "", "propagate_at_launch", false),
map("key", "k8s.io/cluster-autoscaler/node-template/resources/ephemeral-storage", "value", "${lookup(var.worker_groups_launch_template[count.index], "root_volume_size", local.workers_group_launch_template_defaults["root_volume_size"])}Gi", "propagate_at_launch", false)
),
local.asg_tags,
var.worker_group_launch_template_tags[contains(keys(var.worker_group_launch_template_tags), "${lookup(var.worker_groups_launch_template[count.index], "name", count.index)}") ? "${lookup(var.worker_groups_launch_template[count.index], "name", count.index)}" : "default"])
}"]
lifecycle {
create_before_destroy = true
ignore_changes = ["desired_capacity"]
}
}
resource "aws_launch_template" "workers_launch_template" {
name_prefix = "${aws_eks_cluster.this.name}-${lookup(var.worker_groups_launch_template[count.index], "name", count.index)}"
network_interfaces {
associate_public_ip_address = "${lookup(var.worker_groups_launch_template[count.index], "public_ip", local.workers_group_launch_template_defaults["public_ip"])}"
security_groups = ["${local.worker_security_group_id}", "${var.worker_additional_security_group_ids}", "${compact(split(",",lookup(var.worker_groups_launch_template[count.index],"additional_security_group_ids", local.workers_group_launch_template_defaults["additional_security_group_ids"])))}"]
}
iam_instance_profile = {
name = "${element(aws_iam_instance_profile.workers_launch_template.*.name, count.index)}"
}
image_id = "${lookup(var.worker_groups_launch_template[count.index], "ami_id", local.workers_group_launch_template_defaults["ami_id"])}"
instance_type = "${lookup(var.worker_groups_launch_template[count.index], "instance_type", local.workers_group_launch_template_defaults["instance_type"])}"
key_name = "${lookup(var.worker_groups_launch_template[count.index], "key_name", local.workers_group_launch_template_defaults["key_name"])}"
user_data = "${base64encode(element(data.template_file.launch_template_userdata.*.rendered, count.index))}"
ebs_optimized = "${lookup(var.worker_groups_launch_template[count.index], "ebs_optimized", lookup(local.ebs_optimized, lookup(var.worker_groups_launch_template[count.index], "instance_type", local.workers_group_launch_template_defaults["instance_type"]), false))}"
monitoring {
enabled = "${lookup(var.worker_groups_launch_template[count.index], "enable_monitoring", local.workers_group_launch_template_defaults["enable_monitoring"])}"
}
placement {
tenancy = "${lookup(var.worker_groups_launch_template[count.index], "placement_tenancy", local.workers_group_launch_template_defaults["placement_tenancy"])}"
}
count = "${var.worker_group_launch_template_count}"
lifecycle {
create_before_destroy = true
}
block_device_mappings {
device_name = "${data.aws_ami.eks_worker.root_device_name}"
ebs {
volume_size = "${lookup(var.worker_groups_launch_template[count.index], "root_volume_size", local.workers_group_launch_template_defaults["root_volume_size"])}"
volume_type = "${lookup(var.worker_groups_launch_template[count.index], "root_volume_type", local.workers_group_launch_template_defaults["root_volume_type"])}"
iops = "${lookup(var.worker_groups_launch_template[count.index], "root_iops", local.workers_group_launch_template_defaults["root_iops"])}"
encrypted = "${lookup(var.worker_groups_launch_template[count.index], "root_encrypted", local.workers_group_launch_template_defaults["root_encrypted"])}"
kms_key_id = "${lookup(var.worker_groups_launch_template[count.index], "kms_key_id", local.workers_group_launch_template_defaults["kms_key_id"])}"
delete_on_termination = true
}
}
}
resource "aws_iam_instance_profile" "workers_launch_template" {
name_prefix = "${aws_eks_cluster.this.name}"
role = "${lookup(var.worker_groups_launch_template[count.index], "iam_role_id", lookup(local.workers_group_launch_template_defaults, "iam_role_id"))}"
count = "${var.worker_group_launch_template_count}"
path = "${var.iam_path}"
}