aula-07 e aula-08: Cluster Talos HA na Hetzner com Autoscaler

aula-07: Criação de imagem Talos customizada na Hetzner Cloud
- Usa Talos Factory para gerar imagem ARM64/AMD64
- Inclui extensões: qemu-guest-agent, hcloud

aula-08: Provisionamento de cluster Kubernetes Talos via OpenTofu
- 3 Control Planes em HA (CAX11 ARM64)
- 1 Worker Node (CAX11 ARM64)
- Rede privada, Floating IP, Firewall
- Cluster Autoscaler para Hetzner (0-5 workers extras)
- Setup interativo com validação de pré-requisitos
- Custo estimado: ~€18/mês (base)

Também inclui:
- .gitignore para ignorar arquivos sensíveis
- CLAUDE.md com instruções do projeto

aula-08/variables.tf

@@ -0,0 +1,63 @@
+############################################################
+# Variables for Hetzner Talos Kubernetes Cluster
+############################################################
+
+# Authentication
+variable "hcloud_token" {
+  type        = string
+  description = "Hetzner Cloud API token"
+  sensitive   = true
+}
+
+# Cluster Configuration
+variable "environment" {
+  type        = string
+  description = "Environment name (prod, staging, dev)"
+  default     = "prod"
+}
+
+
+# SSH Configuration
+variable "ssh_public_key" {
+  type        = string
+  description = "Public SSH key for emergency access to nodes"
+}
+
+# Talos Configuration
+variable "talos_image_id" {
+  type        = number
+  description = "ID da imagem Talos customizada na Hetzner (criada na aula-07). Obtenha com: hcloud image list --type snapshot"
+}
+
+variable "talos_version" {
+  type        = string
+  description = "Talos version to use"
+  default     = "v1.11.2"  # Match the official image version
+}
+
+# Monitoring Configuration
+variable "enable_monitoring" {
+  type        = bool
+  description = "Enable Victoria Metrics monitoring stack"
+  default     = true
+}
+
+# Auto-scaling Configuration
+variable "scale_up_threshold" {
+  type        = number
+  description = "CPU percentage to trigger scale up"
+  default     = 70
+}
+
+variable "scale_down_threshold" {
+  type        = number
+  description = "CPU percentage to trigger scale down"
+  default     = 30
+}
+
+# Tags for resource management
+variable "custom_labels" {
+  type        = map(string)
+  description = "Custom labels to add to all resources"
+  default     = {}
+}