target_vault_name reference a resource not a variable (#2)

* Add depends on to fix the occasional race condition

* Add changelog

* Use resource and not variable for 'depends_on'

* Add comment for depends_on

* Fix target_vault_name should be referencing a resource and not a variable

* Remove unreleased part for Changelog

* Fix expression for target_vault_name

* New expression for target_vault_name

CHANGELOG.md

@@ -0,0 +1,12 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+<a name="1.0.0"></a>
+## 1.0.0 - 2020-11-09
+
+- Complete AWS Backup module ([#1](https://github.com/umotif-public/terraform-aws-backup/issues/1))
+- Initial commit
+
+
+[Unreleased]: https://github.com/umotif-public/terraform-aws-backup/compare/1.0.0...HEAD

examples/external-vault/main.tf

@@ -106,4 +106,6 @@ module "backup" {
   tags = {
     Environment = "test"
   }
-}
+
+  depends_on = [aws_backup_vault.external_vault]
+}

examples/one-db/main.tf

@@ -168,7 +168,6 @@ module "backup" {
   rules = [
     {
       name              = "test-backup-rule"
-      target_vault_name = "test-rds-aurora"
       schedule          = "cron(0 12 * * ? *)"
       start_window      = "65"
       completion_window = "180"

main.tf

@@ -19,7 +19,7 @@ resource "aws_backup_plan" "main" {
     for_each = var.rules
     content {
       rule_name           = lookup(rule.value, "name")
-      target_vault_name   = lookup(rule.value, "target_vault_name", null) == null ? var.vault_name : lookup(rule.value, "target_vault_name", "Default")
+      target_vault_name   = var.vault_name != null ? aws_backup_vault.main[0].name : lookup(rule.value, "target_vault_name", "Default")
       schedule            = lookup(rule.value, "schedule", null)
       start_window        = lookup(rule.value, "start_window", null)
       completion_window   = lookup(rule.value, "completion_window", null)