Update xdcr example to work better with Terraform Registry

Author: brikis98

examples/couchbase-multi-datacenter-replication/main.tf

@@ -4,13 +4,17 @@
 # ---------------------------------------------------------------------------------------------------------------------
 
 provider "aws" {
-  alias  = "primary"
-  region = "${var.aws_region_primary}"
+  alias = "primary"
+
+  # Region intentionally ommitted so this example will prompt the user for a region when run via Terraform Registry
+  # instructions
 }
 
 provider "aws" {
-  alias  = "replica"
-  region = "${var.aws_region_replica}"
+  alias = "replica"
+
+  # Region intentionally ommitted so this example will prompt the user for a region when run via Terraform Registry
+  # instructions
 }
 
 terraform {
@@ -110,7 +114,7 @@ data "template_file" "user_data_primary" {
     cluster_port     = "${module.couchbase_security_group_rules_primary.rest_port}"
 
     replication_dest_cluster_name       = "${var.cluster_name_replica}"
-    replication_dest_cluster_aws_region = "${var.aws_region_replica}"
+    replication_dest_cluster_aws_region = "${data.aws_region.replica.name}"
   }
 }
 
@@ -433,3 +437,7 @@ data "aws_subnet_ids" "default_replica" {
 
   provider = "aws.replica"
 }
+
+data "aws_region" "replica" {
+  provider = "aws.replica"
+}

examples/couchbase-multi-datacenter-replication/variables.tf

@@ -26,21 +26,11 @@ variable "ami_id_replica" {
   default     = ""
 }
 
-variable "aws_region_primary" {
-  description = "The AWS region to deploy the primary Couchbase cluster into (e.g. us-east-1)."
-  default     = "us-east-1"
-}
-
 variable "cluster_name_primary" {
   description = "What to name the primary Couchbase cluster and all of its associated resources"
   default     = "couchbase-server-primary"
 }
 
-variable "aws_region_replica" {
-  description = "The AWS region to deploy the replica Couchbase cluster into (e.g. us-east-1)."
-  default     = "us-west-1"
-}
-
 variable "cluster_name_replica" {
   description = "What to name the replica Couchbase cluster and all of its associated resources"
   default     = "couchbase-server-replica"