15분 만에 첫 인프라 배포하기

# macOS (Homebrew)
brew tap hashicorp/tap
brew install hashicorp/tap/terraform

# Ubuntu/Debian
wget -O- https://apt.releases.hashicorp.com/gpg | gpg --dearmor | \
  sudo tee /usr/share/keyrings/hashicorp-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] \
  https://apt.releases.hashicorp.com $(lsb_release -cs) main" | \
  sudo tee /etc/apt/sources.list.d/hashicorp.list
sudo apt update && sudo apt install terraform

# 버전 확인
terraform version

# AWS CLI 설치 후
aws configure
# AWS Access Key ID: [발급한 키]
# AWS Secret Access Key: [발급한 시크릿]
# Default region name: ap-northeast-2
# Default output format: json

mkdir terraform-first-lab && cd terraform-first-lab

# provider.tf
terraform {
  required_version = ">= 1.5.0"

  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = "~> 5.0"
    }
  }
}

provider "aws" {
  region = "ap-northeast-2"  # 서울 리전
}

# main.tf
resource "aws_s3_bucket" "my_first_bucket" {
  bucket = "my-terraform-first-bucket-20240101"  # 전 세계 고유한 이름 필요

  tags = {
    Name        = "my-first-bucket"
    Environment = "dev"
    ManagedBy   = "terraform"
  }
}

output "bucket_name" {
  value = aws_s3_bucket.my_first_bucket.bucket
}

output "bucket_arn" {
  value = aws_s3_bucket.my_first_bucket.arn
}

$ terraform init

Initializing the backend...
Initializing provider plugins...
- Finding hashicorp/aws versions matching "~> 5.0"...
- Installing hashicorp/aws v5.31.0...
- Installed hashicorp/aws v5.31.0 (signed by HashiCorp)

Terraform has been successfully initialized!

$ terraform plan

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

Terraform will perform the following actions:

  # aws_s3_bucket.my_first_bucket will be created
  + resource "aws_s3_bucket" "my_first_bucket" {
      + bucket                      = "my-terraform-first-bucket-20240101"
      + tags                        = {
          + "Environment" = "dev"
          + "ManagedBy"   = "terraform"
          + "Name"        = "my-first-bucket"
        }
      ...
    }

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

Changes to Outputs:
  + bucket_arn  = (known after apply)
  + bucket_name = "my-terraform-first-bucket-20240101"

$ terraform apply

# plan 결과 다시 보여줌...

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

aws_s3_bucket.my_first_bucket: Creating...
aws_s3_bucket.my_first_bucket: Creation complete after 2s [id=my-terraform-first-bucket-20240101]

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

Outputs:

bucket_arn = "arn:aws:s3:::my-terraform-first-bucket-20240101"
bucket_name = "my-terraform-first-bucket-20240101"

$ terraform destroy

aws_s3_bucket.my_first_bucket: Refreshing state...

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

Terraform will perform the following actions:

  # aws_s3_bucket.my_first_bucket will be destroyed
  - resource "aws_s3_bucket" "my_first_bucket" {
      ...
    }

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

Do you really want to destroy all resources?
  Enter a value: yes

aws_s3_bucket.my_first_bucket: Destroying...
aws_s3_bucket.my_first_bucket: Destruction complete after 1s

Destroy complete! Resources: 1 destroyed.