Update workers.tf to add lifecycle controls to maintain uptime through launch configuration changes

workers.tf

 resource "aws_launch_configuration" "workers" {
+  lifecycle {
+    create_before_destroy = true
+  }
+  
   associate_public_ip_address = false
   ebs_optimized               = "${var.ebs_optimized_workers}"
   iam_instance_profile        = "${aws_iam_instance_profile.workers.name}"
   image_id                    = "${data.aws_ami.eks_worker.id}"
   instance_type               = "${var.instance_type}"
-  name_prefix                 = "${var.cluster_name}-eks-workers"
+  name_prefix                 = "${var.cluster_name}-eks-workers-"
   security_groups             = ["${aws_security_group.workers.id}"]
   user_data_base64            = "${base64encode(data.template_file.workers_userdata.rendered)}"
 
@@ -14,11 +18,15 @@ resource "aws_launch_configuration" "workers" {
 }
 
 resource "aws_autoscaling_group" "workers" {
+  lifecycle {
+    create_before_destroy = true
+  }
+  
   desired_capacity     = "${var.desired_workers}"
   launch_configuration = "${aws_launch_configuration.workers.id}"
   max_size             = "${var.max_workers}"
   min_size             = "${var.min_workers}"
-  name                 = "${var.cluster_name}-eks-workers"
+  name                 = "${var.cluster_name}-eks-workers - ${aws_launch_configuration.workers.name}"
   vpc_zone_identifier  = ["${var.private_subnets}"]
 
   tag {