Add suspended_processes attributes to autoscaling_group (#153)

Author: bkmeneguello

CHANGELOG.md

@@ -12,6 +12,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
 - A useful addition (slam dunk, @self 🔥)
 - Worker groups can be created with a specified IAM profile. (from @laverya)
 - exposed `aws_eks_cluster` create and destroy timeouts (by @RGPosadas)
+- Added `suspended_processes` to `worker_groups` input (by @bkmeneguello)
 - exposed `placement_tenancy` for autoscaling group (by @monsterxx03)
 - Allow port 443 from EKS service to nodes to run `metrics-server`. (by @max-rocket-internet)
 

local.tf

@@ -33,6 +33,7 @@ locals {
     additional_security_group_ids = ""                              # A comman delimited list of additional security group ids to include in worker launch config
     protect_from_scale_in         = false                           # Prevent AWS from scaling in, so that cluster-autoscaler is solely responsible.
     iam_role_id                   = "${local.default_iam_role_id}"  # Use the specified IAM role if set.
+    suspended_processes           = ""                              # A comma delimited string of processes to to suspend. i.e. AZRebalance,HealthCheck,ReplaceUnhealthy
   }
 
   workers_group_defaults = "${merge(local.workers_group_defaults_defaults, var.workers_group_defaults)}"

workers.tf

@@ -6,13 +6,14 @@ resource "aws_autoscaling_group" "workers" {
   launch_configuration  = "${element(aws_launch_configuration.workers.*.id, count.index)}"
   vpc_zone_identifier   = ["${split(",", coalesce(lookup(var.worker_groups[count.index], "subnets", ""), local.workers_group_defaults["subnets"]))}"]
   protect_from_scale_in = "${lookup(var.worker_groups[count.index], "protect_from_scale_in", local.workers_group_defaults["protect_from_scale_in"])}"
+  suspended_processes   = ["${split(",", coalesce(lookup(var.worker_groups[count.index], "suspended_processes", ""), local.workers_group_defaults["suspended_processes"]))}"]
   count                 = "${var.worker_group_count}"
 
   tags = ["${concat(
     list(
       map("key", "Name", "value", "${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)
     ),
     local.asg_tags)
   }"]