Add basic terraform config

.gitignore

 *.pyc
 *.retry
+*.terraform
+*.tfstate*
 /borg-keys/

README.md

@@ -33,6 +33,20 @@ In order to use this, you need to install packer and then run
 
 This will take some time after which a new snapshot will have been created on the primary hcloud archlinux project.
 
+##### Note about terraform
+
+We use terraform to provision a part of the infrastructure on hcloud.
+In order to use this, you need to install terraform and then run
+
+    terraform plan -var $(./packer/get_hetzner_cloud_api_key.sh) terraform
+
+This will show you planned changes between the current infrastructure and the desired infrastructure.
+You can then run
+
+    terraform apply -var $(./packer/get_hetzner_cloud_api_key.sh) terraform
+
+to actually apply your changes.
+
 ##### Note about opendkim
 
 The opendkim DNS data has to be added to DNS manually. The roles verifies that the DNS is correct before starting opendkim.

terraform/archlinux.tf

+variable "hetzner_cloud_api_key" {}
+
+# Find the id using `hcloud image list`
+variable "archlinux_image_id" {
+  default = "2923545"
+}
+
+provider "hcloud" {
+  token = "${var.hetzner_cloud_api_key}"
+}
+
+resource "hcloud_floating_ip" "bbs" {
+  type = "ipv4"
+  server_id = "${hcloud_server.bbs.id}"
+}
+
+resource "hcloud_rdns" "bbs" {
+  floating_ip_id = "${hcloud_floating_ip.bbs.id}"
+  ip_address = "${hcloud_floating_ip.bbs.ip_address}"
+  dns_ptr = "bbs.archlinux.org"
+}
+
+resource "hcloud_server" "bbs" {
+  name = "bbs.archlinux.org"
+  image = "${var.archlinux_image_id}"
+  server_type = "cx11"
+}