TF-003 Use the core Terraform workflow — All Questions With Answers

Refer to the exhibit.

```
Error: Error applying plan!

  on main.tf line 12, in resource "aws_instance" "web":
  12:   ami = "ami-0c55b159cbfafe1f0"

The resource "aws_instance" "web" was successfully created but failed to initialize after creation. The following errors may help:

Error: timeout - last error: SSH connection failed (unreachable)
```

Refer to the exhibit.

```hcl
resource "aws_instance" "web" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = "t2.micro"
}
```

An engineer runs `terraform apply` with this configuration and receives the following error:

```
Error: Error launching source instance: UnauthorizedOperation: You are not authorized to perform this operation.
```

Refer to the exhibit.

```hcl
# main.tf
terraform {
  backend "s3" {
    bucket = "my-org-terraform-state"
    key    = "prod/terraform.tfstate"
    region = "us-east-1"
  }
}

provider "aws" {
  region = "us-west-2"
}

resource "aws_instance" "example" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = "t2.micro"
}
```

Refer to the exhibit.

```
$ terraform plan -out=tfplan
$ terraform apply "tfplan"
```
The developer runs the commands above. During the apply, the network connection is lost and the command fails halfway through. The developer re-establishes connectivity and runs `terraform apply` again without specifying a plan file. What will happen?

Refer to the exhibit.

```
$ terraform init
Initializing the backend...

Successfully configured the backend "local"! Terraform will automatically
use this backend unless the backend configuration changes.

Initializing provider plugins...
- Using previously-installed hashicorp/random v3.5.1

Terraform has been successfully initialized!

$ terraform plan

No changes. Your infrastructure matches the configuration.

$ terraform apply -auto-approve

No changes. Your infrastructure matches the configuration.
```