Configure schedule (#52)

Ability to configure CA schedule

main.tf

@@ -340,13 +340,14 @@ module "scheduler-role" {
 }
 
 module "scheduler" {
-  # triggers step function once per day
+  # triggers step function once per day by default
   source = "./modules/terraform-aws-ca-scheduler"
 
-  project    = var.project
-  env        = var.env
-  role_arn   = module.scheduler-role.lambda_role_arn
-  target_arn = module.step-function.state_machine_arn
+  project             = var.project
+  env                 = var.env
+  role_arn            = module.scheduler-role.lambda_role_arn
+  target_arn          = module.step-function.state_machine_arn
+  schedule_expression = var.schedule_expression
 }
 
 module "db-reader-role" {

modules/terraform-aws-ca-scheduler/variables.tf

@@ -21,7 +21,6 @@ variable "target_arn" {
 
 variable "schedule_expression" {
   description = "Schedule in supported format"
-  default     = "cron(15 8 * * ? *)" # 8.15 a.m. daily
 }
 
 variable "group_name" {

variables.tf

@@ -166,6 +166,11 @@ variable "s3_aws_principals" {
   default     = []
 }
 
+variable "schedule_expression" {
+  description = "Step function schedule in supported format, must be carefully synchronised with CRL schedule and timing"
+  default     = "cron(15 8 * * ? *)" # 8.15 a.m. daily
+}
+
 variable "subscription_filter_destination" {
   description = "CloudWatch log subscription filter destination, last section of ARN"
   default     = ""