How to access terraform provider attributes within resources in terraform script?

Question

I'm trying to create a basic terraform script to spin up an ec2 on aws. For time being. I'm using local-exec provisioner. The script looks like this.

    provider "aws" {
      profile = "default"
      region  = "eu-central-1"
      version = "2.53"
    }

    resource "aws_instance" "gsb_ec2" {
      ami           = "ami-0b418580298265d5c"
      instance_type = "t2.micro"

      provisioner "local-exec" {
        command = "echo ${aws_instance.gsb_ec2.public_ip} > ip_address.txt"

      }
      provisioner "local-exec" {
        command = "echo ${aws_instance.gsb_ec2.public_ip} > ip_address.txt"
          }
    }

I want to echo provider region just like I'm echoing aws instance public ip.

I'm getting following error because provider is not a resource obviously.

Error: Reference to undeclared resource

So, how do I access provider attributes?

Thanks

Mark B Mark B · Accepted Answer · 2020-03-16T18:41:56

You need to use a data component to get to the current region:

data "aws_region" "current" {}

Then you can echo data.aws_region.current.name

How to access terraform provider attributes within resources in terraform script?

1 Answers