How does local-exec provisioner work in Terraform

Question

Hi Guys,

I have created one EC2 instance in AWS using Terraform code. I want to save the Private IP of the instance in my local system. How can I do that?

Answer 1

Hi@akhtar,

You can use a local-exec provisioner to do this task. The local-exec provisioner invokes a local executable after a resource is created. This invokes a process on the machine running the Terraform, not on the resource. You can see the remote-exec provisioned to run commands on the resource. I have attached one example below for your reference.

resource "aws_instance" "web" {
  provisioner "local-exec" {
    command = "echo ${aws_instance.web.private_ip} >> private_ips.txt"
  }
}