Initial commit: Terraform plan for Singapore production ACK cluster

- Creates VPC with 3 vswitches across availability zones
- Creates security group with ports for all production services
- Creates ACK managed Kubernetes cluster with 10 worker nodes
- Auto-scaling up to 20 worker nodes
- Creates SLB for load balancing
- Includes deploy.sh script to apply cluster-all.yaml resources

variables.tf

@@ -0,0 +1,93 @@
+variable "region" {
+  description = "Alibaba Cloud region"
+  type        = string
+  default     = "ap-southeast-1"
+}
+
+variable "access_key" {
+  description = "Alibaba Cloud access key"
+  type        = string
+  sensitive   = true
+}
+
+variable "secret_key" {
+  description = "Alibaba Cloud secret key"
+  type        = string
+  sensitive   = true
+}
+
+variable "project" {
+  description = "Project name prefix for resources"
+  type        = string
+  default     = "lingble-prod"
+}
+
+variable "vpc_cidr" {
+  description = "CIDR block for VPC"
+  type        = string
+  default     = "10.0.0.0/16"
+}
+
+variable "tags" {
+  description = "Tags to apply to all resources"
+  type        = map(string)
+  default     = {
+    Environment = "production"
+    ManagedBy   = "terraform"
+    Cluster     = "singapore-prod"
+  }
+}
+
+variable "k8s_cluster_spec" {
+  description = "ACK cluster spec: ack.pro.small, ack.standard"
+  type        = string
+  default     = "ack.pro.small"
+}
+
+variable "k8s_worker_instance_type" {
+  description = "Worker node instance type"
+  type        = string
+  default     = "ecs.s6-c2m2"
+}
+
+variable "k8s_worker_count" {
+  description = "Number of worker nodes"
+  type        = number
+  default     = 10
+}
+
+variable "k8s_max_worker_count" {
+  description = "Maximum number of worker nodes (for autoscaling)"
+  type        = number
+  default     = 20
+}
+
+variable "k8s_worker_disk_category" {
+  description = "Worker node system disk category"
+  type        = string
+  default     = "cloud_ssd"
+}
+
+variable "k8s_worker_disk_size" {
+  description = "Worker node system disk size in GB"
+  type        = number
+  default     = 100
+}
+
+variable "k8s_data_disk_category" {
+  description = "Worker node data disk category"
+  type        = string
+  default     = "cloud_ssd"
+}
+
+variable "k8s_data_disk_size" {
+  description = "Worker node data disk size in GB"
+  type        = number
+  default     = 200
+}
+
+variable "ssl_certificate_id" {
+  description = "SSL certificate ID for SLB (from alicloud_ssl_certificate)"
+  type        = string
+  default     = ""
+}