feat(tf): offsite environment — askari (CAX11/hel1/debian-13)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

terraform/environments/offsite/backend.tf

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+# Terraform state: LOCAL, on the control node (like the Proxmox envs; ADR-006).
+# askari survives a homelab outage by design, so a lost state is recovered by
+# `terraform import` of the running server — not a rebuild. Back the state up with
+# the control node (ADR-022).

terraform/environments/offsite/main.tf

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+# offsite/main.tf — off-site Hetzner hosts. Terraform owns VM existence (ADR-006,
+# generalized to Hetzner). ALWAYS `make tf-plan TF_ENV=offsite` and review before
+# `make tf-apply TF_ENV=offsite`.
+
+module "askari" {
+  source = "../../modules/hetzner_vm"
+
+  name               = "askari"
+  server_type        = "cax11" # ARM, 2 vCPU / 4 GB
+  location           = "hel1"  # Helsinki
+  image              = "debian-13"
+  ansible_ssh_pubkey = var.ansible_ssh_pubkey
+  ssh_admin_cidrs    = var.ssh_admin_cidrs
+  labels = {
+    env        = "offsite"
+    group      = "offsite_hosts"
+    managed-by = "terraform"
+  }
+}

terraform/environments/offsite/outputs.tf

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+output "vms" {
+  description = "Hostname -> IP and Ansible group — consumed by make tf-inventory-offsite"
+  value = {
+    askari = {
+      ip    = module.askari.ipv4_address
+      group = "offsite_hosts"
+    }
+  }
+}

terraform/environments/offsite/providers.tf

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+# verified: hetznercloud/hcloud 1.65.0 · debian-13 image · cax11@hel1 · terraform-registry · 2026-06-14
+terraform {
+  required_version = ">= 1.9"
+
+  required_providers {
+    hcloud = {
+      source  = "hetznercloud/hcloud"
+      version = "~> 1.65"
+    }
+  }
+}
+
+provider "hcloud" {
+  token = var.hcloud_token
+}

terraform/environments/offsite/terraform.tfvars.example

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+# offsite environment — non-secret values. Copy to terraform.tfvars and fill in.
+#
+# Secret is exported as an env var (never in this file); the make tf-* targets do this
+# automatically for TF_ENV=offsite, sourcing vault.hetzner.token:
+#   export TF_VAR_hcloud_token="...from vault.hetzner.token..."
+#
+# State is local (see backend.tf).
+
+ansible_ssh_pubkey = "ssh-ed25519 AAAA... ansible@ubongo"
+ssh_admin_cidrs    = ["10.20.10.151/32"] # ubongo's LAN address (ADR-021)

terraform/environments/offsite/variables.tf

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+variable "hcloud_token" {
+  description = "Hetzner Cloud API token — set via TF_VAR_hcloud_token (from vault.hetzner.token)"
+  type        = string
+  sensitive   = true
+}
+
+variable "ansible_ssh_pubkey" {
+  description = "ubongo's control SSH public key, provisioned for the ansible user"
+  type        = string
+}
+
+variable "ssh_admin_cidrs" {
+  description = "Source CIDRs allowed to SSH askari (ubongo's address/32)"
+  type        = list(string)
+}