Provision DNS entries using DigitalOcean instead of DNS registrar

This way we can implement dynamic (provision-time) Floating IP, instead of a
hardcoded pre-created Floating IP address.

Related changes:
- remove =terraform-godaddy= provider, use =digitalocean_record= instead;
- create =generated-known-hosts= after provisioning instead of during
=setup.sh=: use the =$(terraform output public_floating_ip)= value to make this
file dynamic;
- remote the =$PINNED_IP= and =$TF_VAR_floating_ip= variables;
- add type and descriptions to variable declarations in Terraform recipe.

1 files changed, 50 insertions, 28 deletions

diff --git a/vps.tf b/vps.tf
index 701c98d..badc698 100644
--- a/vps.tf
+++ b/vps.tf
@@ -1,9 +1,22 @@
-variable "floating_ip" {}
+variable "do_token" {
+  type        = "string"
+  description = "DigitalOcean API token."
+}
+
+variable "tld" {
+  type        = "string"
+  description = "Root Top-Level Domain. Subdomains will be derived from it."
+}
 
-variable "do_token" {}
-variable "tld" {}
-variable "wallabag_tld" {}
-variable "nextcloud_tld" {}
+variable "wallabag_tld_prefix" {
+  type        = "string"
+  description = "DNS prefix used for the Wallabag installation. Does not contain a dot at the end."
+}
+
+variable "nextcloud_tld_prefix" {
+  type        = "string"
+  description = "DNS prefix used for the Nextcloud installation. Does not contain a dot at the end."
+}
 
 provider "digitalocean" {
   token   = "${var.do_token}"
@@ -42,11 +55,6 @@ resource "digitalocean_droplet" "vps" {
   }
 }
 
-resource "digitalocean_floating_ip_assignment" "vps" {
-  ip_address = "${var.floating_ip}"
-  droplet_id = "${digitalocean_droplet.vps.id}"
-}
-
 resource "digitalocean_volume" "vps_persistent_volume" {
   region                  = "nyc3"
   name                    = "vps-persistent-volume"
@@ -60,26 +68,40 @@ resource "digitalocean_volume_attachment" "foobar" {
   droplet_id = "${digitalocean_droplet.vps.id}"
 }
 
-locals {
-  cname_subdomains = [
-    "${var.wallabag_tld}",
-    "${var.nextcloud_tld}",
-  ]
+resource "digitalocean_floating_ip" "vps_public_ip" {
+  region = "${digitalocean_droplet.vps.region}"
 }
 
-resource "godaddy_domain_record" "vps_tld" {
-  domain    = "${var.tld}"
-  addresses = ["${var.floating_ip}"]
+resource "digitalocean_floating_ip_assignment" "vps_public_ip_assignment" {
+  ip_address = "${digitalocean_floating_ip.vps_public_ip.id}"
+  droplet_id = "${digitalocean_droplet.vps.id}"
+}
 
-  record {
-    type = "CNAME"
-    name = "${var.tld}"
-    data = "${var.wallabag_tld}"
-  }
+output "public_floating_ip" {
+  value = "${digitalocean_floating_ip.vps_public_ip.ip_address}"
+}
 
-  record {
-    type = "CNAME"
-    name = "${var.tld}"
-    data = "${var.nextcloud_tld}"
-  }
+resource "digitalocean_domain" "vps_tld" {
+  name = "${var.tld}"
+}
+
+resource "digitalocean_record" "at_sign" {
+  domain = "${digitalocean_domain.vps_tld.name}"
+  type   = "A"
+  name   = "@"
+  value  = "${digitalocean_floating_ip.vps_public_ip.ip_address}"
+}
+
+resource "digitalocean_record" "wallabag" {
+  domain = "${digitalocean_domain.vps_tld.name}"
+  type   = "CNAME"
+  name   = "${var.wallabag_tld_prefix}"
+  value  = "${digitalocean_domain.vps_tld.name}."
+}
+
+resource "digitalocean_record" "nextcloud" {
+  domain = "${digitalocean_domain.vps_tld.name}"
+  type   = "CNAME"
+  name   = "${var.nextcloud_tld_prefix}"
+  value  = "${digitalocean_domain.vps_tld.name}."
 }