Support creating multiple worker auto scaling groups, similar to KOPS

modules/worker_groups/variables.tf

@@ -0,0 +1,64 @@
+variable "additional_userdata" {
+  description = "Extra lines of userdata (bash) which are appended to the default userdata code."
+  default     = ""
+}
+
+variable "aws_region" {
+  description = "The AWS region where the cluster resides."
+}
+
+variable "certificate_authority" {
+  description = "Base64 encoded certificate authority of the cluster."
+}
+
+variable "cluster_name" {
+  description = "Name of the EKS cluster which is also used as a prefix in names of related resources."
+}
+
+variable "ebs_optimized_workers" {
+  description = "If left at default of true, will use ebs optimization if available on the given instance type."
+  default     = true
+}
+
+variable "endpoint" {
+  description = "API endpoint of the cluster."
+}
+
+variable "iam_instance_profile" {
+  description = "Worker IAM instance profile name."
+}
+
+variable "security_group_id" {
+  description = "Worker security group ID."
+}
+
+variable "subnets" {
+  description = "A list of subnets to associate with the cluster's underlying instances."
+  type        = "list"
+}
+
+variable "tags" {
+  description = "A map of tags to add to all resources."
+  default     = {}
+}
+
+variable "workers_ami_id" {
+  description = "AMI ID for the eks workers. If none is provided, Terraform will search for the latest version of their EKS optimized worker AMI."
+  default     = ""
+}
+
+variable "worker_groups" {
+  description = "A list of maps defining worker group configurations."
+  type        = "list"
+
+  default = [
+    {
+      name                 = "nodes"    # Name of the worker group.
+      ami_id               = ""         # AMI ID for the eks workers. If none is provided, Terraform will search for the latest version of their EKS optimized worker AMI.
+      asg_desired_capacity = "1"        # Desired worker capacity in the autoscaling group.
+      asg_max_size         = "3"        # Maximum worker capacity in the autoscaling group.
+      asg_min_size         = "1"        # Minimum worker capacity in the autoscaling group.
+      instance_type        = "m4.large" # Size of the workers instances.
+    },
+  ]
+}