38.User Variable Setup Using Terraform

Source: Dev.to

Lab Information

The Nautilus DevOps team is automating IAM user creation using Terraform for better identity management.
Create an AWS IAM user with the following requirements:

• The IAM user name iamuser_mark should be stored in a variable named KKE_user.
• Configuration values should be stored in a variables.tf file.
• The Terraform script should be structured with a main.tf file referencing variables.tf.
• Working directory: /home/bob/terraform.

variables.tf

# Define variable for IAM user name
variable "KKE_user" {
  description = "The name of the IAM user to create"
  type        = string
  default     = "iamuser_mark"
}

main.tf

# Create AWS IAM User with variable reference
resource "aws_iam_user" "this" {
  name = var.KKE_user

  tags = {
    Name = var.KKE_user
  }
}

Terraform Commands

cd /home/bob/terraform
terraform init

Output (excerpt):

Initializing the backend...
Initializing provider plugins...
- Finding hashicorp/aws versions matching "5.91.0"...
- Installing hashicorp/aws v5.91.0...
- Installed hashicorp/aws v5.91.0 (signed by HashiCorp)
Terraform has created a lock file .terraform.lock.hcl to record the provider selections.
Terraform has been successfully initialized!

terraform plan

Output (excerpt):

Terraform used the selected providers to generate the following execution plan.
Resource actions are indicated with the following symbols:
  + create

# aws_iam_user.this will be created
+ resource "aws_iam_user" "this" {
    + arn           = (known after apply)
    + force_destroy = false
    + id            = (known after apply)
    + name          = "iamuser_mark"
    + path          = "/"
    + tags          = {
        + "Name" = "iamuser_mark"
      }
    + tags_all      = {
        + "Name" = "iamuser_mark"
      }
    + unique_id     = (known after apply)
  }

Plan: 1 to add, 0 to change, 0 to destroy.

terraform apply

When prompted, type yes to confirm.

Output (excerpt):

aws_iam_user.this: Creating...
aws_iam_user.this: Creation complete after 0s [id=iamuser_mark]

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.