added default_tags variable

Author: mikmorley

README.md

@@ -14,6 +14,7 @@ module "ami_scheduled_backup" {
   backup_tag          = var.backup_tag
   backup_retention    = var.backup_retention
   schedule_expression = var.cron_expressions
+  default_tags        = var.default_tags
 }
 ```
 
@@ -31,6 +32,10 @@ module "ami_scheduled_backup" {
   backup_tag          = "Backup-AZ-A"
   backup_retention    = 7 # Keep seven days of backs (AMIs & Snapshots)
   schedule_expression = "cron(0 20 * * ? *)" # Backup at 8:00pm UTC Daily
+
+  default_tags = {
+    Owner = "Cloud Engineering"
+  }
 }
 ```
 
@@ -45,3 +50,4 @@ module "ami_scheduled_backup" {
 |`backup_tag`|_Optional_, Specify the tag that will be assigned to EC2 instances that are to be backed up (defaults to _Backup_). **Note:** The Tag value **must** be set to **yes** in order for the backup to be created.|
 |`backup_retention`|_Optional_, Specify the number of days to keep the AMI and Snapshots (Defaults to 30).|
 |`schedule_expression`|_Required_, Scheduling expression for triggering the Lambda Function using CloudWatch events. For example, cron(0 20 * * ? *) or rate(5 minutes).|
+|`default_tags`|_Optional_, default tags to be applied to all resources.|

main.tf

@@ -20,6 +20,10 @@ resource "aws_iam_role" "default" {
   ]
 }
   EOF
+
+  tags = merge({
+    Name = "${var.name}-${var.region}"
+  }, var.default_tags)
 }
 
 resource "aws_iam_policy_attachment" "default" {
@@ -71,10 +75,10 @@ resource "aws_cloudwatch_log_group" "default" {
   name              = "/aws/lambda/${aws_lambda_function.default.function_name}"
   retention_in_days = 14
 
-  tags = {
+  tags = merge({
     Name        = var.name
     Environment = var.environment
-  }
+  }, var.default_tags)
 }
 
 resource "aws_lambda_function" "default" {
@@ -95,11 +99,11 @@ resource "aws_lambda_function" "default" {
     }
   }
 
-  tags = {
+  tags = merge({
     Name        = var.name
     Type        = "Lambda Function"
     Environment = var.environment
-  }
+  }, var.default_tags)
 }
 
 resource "aws_lambda_permission" "default" {
@@ -114,6 +118,11 @@ resource "aws_cloudwatch_event_rule" "default" {
   name                = "${var.name}-${var.region}-trigger"
   description         = "Triggers AMI Backup of EC2 Instances"
   schedule_expression = var.schedule_expression
+
+  tags = merge({
+    Name        = "${var.name}-${var.region}-trigger"
+    Environment = var.environment
+  }, var.default_tags)
 }
 
 resource "aws_cloudwatch_event_target" "default" {

variables.tf

@@ -29,4 +29,10 @@ variable "backup_retention" {
 
 variable "schedule_expression" {
   description = "Scheduling expression for triggering the Lambda Function using CloudWatch events. For example, cron(0 20 * * ? *) or rate(5 minutes)."
-}
+}
+
+variable "default_tags" {
+  description = "Optional default tags to be applied to all resources"
+  type        = map(string)
+  default     = {}
+}