adding multi az components

Author: raghavanr

rds.tf

@@ -8,4 +8,7 @@ resource "aws_db_instance" "rds" {
   username             = "${var.username}"
   password             = "${var.password}"
   port                 = "${var.port}"
+  availability_zone = "${var.availability_zone}"
+  multi_az = "${var.multi_az}"
+  db_subnet_group_name = "${var.db_subnet_group_name}"
 }

variables.tf

@@ -15,3 +15,13 @@ variable "username" {}
 variable "password" {}
 
 variable "port" {}
+
+variable "db_subnet_group_name" {
+    type = "list"
+}
+
+variable "availability_zone" {}
+
+variable "multi_az" {
+    default = true
+}