Add cluster name and ephemeral storage tags for cluster autoscaler (#299)

Author: tbarrella

CHANGELOG.md

@@ -11,6 +11,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Added
 
+- "k8s.io/cluster-autoscaler/{cluster-name}" and "k8s.io/cluster-autoscaler/node-template/resources/ephemeral-storage" tags for autoscaling groups (by @tbarrella)
 - Added "ec2:DescribeLaunchTemplateVersions" action to worker instance role (by @skang0601)
 - Adding ebs encryption for workers launched using workers_launch_template (by @russki)
 - Added output for generated kubeconfig filename (by @syst0m)

workers.tf

@@ -18,7 +18,9 @@ resource "aws_autoscaling_group" "workers" {
     list(
       map("key", "Name", "value", "${aws_eks_cluster.this.name}-${lookup(var.worker_groups[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[count.index], "autoscaling_enabled", local.workers_group_defaults["autoscaling_enabled"]) == 1 ? "enabled" : "disabled"  }", "value", "true", "propagate_at_launch", false)
+      map("key", "k8s.io/cluster-autoscaler/${lookup(var.worker_groups[count.index], "autoscaling_enabled", local.workers_group_defaults["autoscaling_enabled"]) == 1 ? "enabled" : "disabled"  }", "value", "true", "propagate_at_launch", false),
+      map("key", "k8s.io/cluster-autoscaler/${aws_eks_cluster.this.name}", "value", "", "propagate_at_launch", false),
+      map("key", "k8s.io/cluster-autoscaler/node-template/resources/ephemeral-storage", "value", "${lookup(var.worker_groups[count.index], "root_volume_size", local.workers_group_defaults["root_volume_size"])}Gi", "propagate_at_launch", false)
     ),
     local.asg_tags,
     var.worker_group_tags[contains(keys(var.worker_group_tags), "${lookup(var.worker_groups[count.index], "name", count.index)}") ? "${lookup(var.worker_groups[count.index], "name", count.index)}" : "default"])

workers_launch_template.tf

@@ -44,7 +44,9 @@ resource "aws_autoscaling_group" "workers_launch_template" {
     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/${lookup(var.worker_groups_launch_template[count.index], "autoscaling_enabled", local.workers_group_launch_template_defaults["autoscaling_enabled"]) == 1 ? "enabled" : "disabled"  }", "value", "true", "propagate_at_launch", false),
+      map("key", "k8s.io/cluster-autoscaler/${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"])