first commit

terraform/cloud-cluster/variables.tf

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+variable "aws_region" {
+  description = "AWS region for the optional production-style K3s host."
+  type        = string
+  default     = "us-east-1"
+}
+
+variable "availability_zone" {
+  description = "Availability zone for the subnet. Leave null to use the first AZ."
+  type        = string
+  default     = null
+}
+
+variable "instance_type" {
+  description = "EC2 instance type for the lab node."
+  type        = string
+  default     = "t3.medium"
+}
+
+variable "ssh_key_name" {
+  description = "Existing EC2 key pair name used for Ansible bootstrap."
+  type        = string
+}
+
+variable "admin_cidr" {
+  description = "CIDR allowed to SSH to the node; restrict this to your admin IP."
+  type        = string
+}
+
+variable "ami_id" {
+  description = "Ubuntu 22.04 LTS AMI ID for the selected region."
+  type        = string
+}
+