8. Importing Resources

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📌 How Import Works

Import command

terraform import <terraform_resource_address> <aws_resource_identifier>

Important Rules

• ✔ Resource MUST exist in AWS
• ✔ Resource MUST exist as a block in Terraform

After import

• Terraform updates terraform.tfstate
• But does NOT write code for you in .tf
• You must add matching resource config/attributes in .tf file

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📌 Import IAM Role — Steps

1. Write the resource block in .tf

   • Ensure name matches AWS resource ✔

     resource "aws_iam_role" "lambda_role" {
          name = "OrderUpLambdaExecutionRole"
     }

2. Run terraform import

   • Maps existing AWS resource to state ✔

     terraform import aws_iam_role.lambda_role OrderUpLambdaExecutionRole

3. Run terraform plan

   • Terraform compares real infra ⇄ state + config ✔

     terraform plan

4. Fix the Drift

   • Fix any differences
   • Update .tf until no unexpected drift ✔

5. Run terraform apply

   • Sync final desired config → infra + state ✔

     terraform apply

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