GCP Terraform resource policy in compute module issues - google-cloud-platform

Question

I am trying to add a start-stop schedule to our vm instances in our cloud repository (it is a terraform/terragrunt setup)
The example presented on the official site is this:
So since we use Terragrunt as a wrapper my module looks like this:
And for reference my variable block is this:
When i push the code it errors on step 0 in CloudBuild with the following error:
Error: Reference to undeclared input variable on main.tf line 116, in resource "google_compute_resource_policy" "hourly": 116: time_zone = var.time_zone
An input variable with the name "time_zone" has not been declared. This variable can be declared with a variable "time_zone" {}block.
I have tried placing this variable in different positions of the block but i keep getting the same error. Has anyone got any ideas?

Answer 1

This is now resolved. I want to thank #kornshell93 for pointing me in the right direction.
I ended up using the block as suggested but creating a new module and hitting that from a separate section within my vm instance block. I linked to the project as a dependency this way. The previous method via the main compute instance module kept failing on all other vm instances, almost like it was expecting this block on all of them.
resource "google_compute_resource_policy" "hourly" {
name = var.instance_schedule_policy.name
region = var.region
project = var.project
description = "Start and stop instances"
instance_schedule_policy {
vm_start_schedule {
schedule = var.instance_schedule_policy.vm_start_schedule
}
vm_stop_schedule {
schedule = var.instance_schedule_policy.vm_stop_schedule
}
time_zone = var.instance_schedule_policy.time_zone
}
}
And the vm instance block
inputs = {
#instance start/stop schedules
project = dependency.project.outputs.project_id
region = "europe-west2"
instance_schedule_policy = {
name = "start-stop"
vm_start_schedule = "30 07 * * *"
vm_stop_schedule = "00 18 * * *"
time_zone = "GMT"
}
}