allow for specifying stage via variables

Signed-off-by: Jakub Sokołowski <jakub@status.im>

README.md

@@ -28,6 +28,7 @@ module "google-cloud" {
   * `name` - Prefix of hostname before index. (default: `node`)
   * `group` - Name of Ansible group to add hosts to.
   * `env` - Environment for these hosts, affects DNS entries.
+  * `stage` - Name of stage, like `prod`, `dev`, or `staging`.
   * `domain` - DNS Domain to update.
 * __Security__
   * `ansible_playbook` - Location of the Ansible playbook to run.

main.tf

@@ -1,7 +1,7 @@
 /* DERIVED --------------------------------------*/
 
 locals {
-  stage = terraform.workspace
+  stage = var.stage != "" ? var.stage : terraform.workspace
   dc    = "${var.provider_name}-${var.zone}"
   /* always add SSH, Tinc, Netdata, and Consul to allowed ports */
   open_tcp_ports = concat(["22", "655", "8000", "8301"], var.open_tcp_ports)

variables.tf

@@ -79,6 +79,12 @@ variable "env" {
   type        = string
 }
 
+variable "stage" {
+  description = "Name of stage, like prod, dev, or staging."
+  type        = string
+  default     = ""
+}
+
 variable "group" {
   description = "Ansible group to assign hosts to."
   type        = string