1.3.3 - Terraform Variables

Last updated Jan 25, 2025

Youtube Video | ~24 min

https://www.youtube.com/watch?v=PBi0hHjLftk&list=PL3MmuxUbc_hJed7dXYoJw8DoCuVHhGEQb&index=13&pp=iAQB

✍️ In this video we will continue talking about terraform main.tf and now variable.tf. We will also learn about Big Query Datasets and using function file().

Terraform Big Query Dataset

Terraform Registry

https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/bigquery_dataset#example-usage---bigquery-dataset-basic

Main.tf

Append info to our previous main.tf from 1.3.2

resource "google_bigquery_dataset" "demo_dataset" {
  dataset_id = "example-dataset"
}

◼️ Terminal run terraform apply, because we changed our main.tf file. You can now see this added into GCP.

Variables.tf

variable "bq_dataset_name" {
  description = "My BigQuery Dataset Name"
  #Update the below to what you want your dataset to be called
  default     = "demo_dataset"
}

To use your variables.tf, we will need to modify the main.tf

resource "google_bigquery_dataset" "demo_dataset" {
  dataset_id = var.bq_dataset_name
  location   = var.location
}

Another example you cn add is using function file() in your variables.tf scripts

variable "credentials" {
  description = "My Credentials"
  default     = "<Path to your Service Account json file>"
  #ex: if you have a directory where this file is called keys with your service account json file
  #saved there as my-creds.json you could use default = "./keys/my-creds.json"
}

Resources

Full terraform code here:

https://github.com/Tinker0425/de-zoomcamp-my-work/tree/master/module-01/terraform

🔗 https://registry.terraform.io/