Extra tags

README.md

@@ -232,6 +232,7 @@ so don't bother manually changing them.
 | snapshot\_identifier | DB snapshot to create this database from | `string` | `""` | no |
 | storage\_encrypted | Specifies whether the underlying storage layer should be encrypted | `string` | `"true"` | no |
 | username | Master DB username | `string` | `"root"` | no |
+| extra_tags | A map of additional tags for resources | `map` | `{}` | no |
 
 ## Outputs
 

main.tf

@@ -5,10 +5,10 @@ resource "aws_db_subnet_group" "main" {
   description = "Group of DB subnets"
   subnet_ids  = var.subnets
 
-  tags = {
+  tags = merge({
     envname = var.envname
     envtype = var.envtype
-  }
+  }, var.extra_tags)
 }
 
 // Create single DB instance
@@ -32,10 +32,10 @@ resource "aws_rds_cluster_instance" "cluster_instance_0" {
   promotion_tier               = "0"
   performance_insights_enabled = var.performance_insights_enabled
 
-  tags = {
+  tags = merge({
     envname = var.envname
     envtype = var.envtype
-  }
+  }, var.extra_tags)
 }
 
 // Create 'n' number of additional DB instance(s) in same cluster
@@ -58,10 +58,10 @@ resource "aws_rds_cluster_instance" "cluster_instance_n" {
   promotion_tier               = count.index + 1
   performance_insights_enabled = var.performance_insights_enabled
 
-  tags = {
+  tags = merge({
     envname = var.envname
     envtype = var.envtype
-  }
+  }, var.extra_tags)
 }
 
 // Create DB Cluster
@@ -89,6 +89,11 @@ resource "aws_rds_cluster" "default" {
   db_cluster_parameter_group_name     = var.db_cluster_parameter_group_name
   iam_database_authentication_enabled = var.iam_database_authentication_enabled
   enabled_cloudwatch_logs_exports     = var.enabled_cloudwatch_logs_exports
+
+  tags = merge({
+    envname = var.envname
+    envtype = var.envtype
+  }, var.extra_tags)
 }
 
 // Geneate an ID when an environment is initialised

outputs.tf

@@ -20,3 +20,16 @@ output "reader_endpoint" {
 output "cluster_identifier" {
   value = join("", aws_rds_cluster.default.*.id)
 }
+
+// List of all DB instance ids running in cluster
+output "all_instance_ids_list" {
+  value = [concat(
+    aws_rds_cluster_instance.cluster_instance_0.*.id,
+    aws_rds_cluster_instance.cluster_instance_n.*.id,
+  )]
+}
+
+// A list of cluster members
+output "cluster_members" {
+  value = flatten(aws_rds_cluster.default.*.cluster_members)
+}

variables.tf

@@ -141,8 +141,8 @@ variable "storage_encrypted" {
 }
 
 variable "kms_key_id" {
-  type = string
-  default = ""
+  type        = string
+  default     = ""
   description = "Specify the KMS Key to use for encryption"
 }
 
@@ -265,3 +265,9 @@ variable "enabled_cloudwatch_logs_exports" {
   default     = []
   description = "List of log types to export to CloudWatch Logs. If omitted, no logs will be exported. The following log types are supported: audit, error, general, slowquery, postgresql."
 }
+
+variable "extra_tags" {
+  type        = map(string)
+  default     = {}
+  description = "A map of extra tags for resources"
+}