[macOS] Terraformのインストール

Terraform Development macOS

TerraformをmacOS 12.1にインストールする手順を備忘録として書き留めておく。

環境

Terraformのインストール

Download Terraformにしたがって、Homebrewのtapを登録してインストールする。

$ brew tap hashicorp/tap
$ brew install hashicorp/tap/terraform
$ hash -r
$ terraform -v
Terraform v1.1.2
on darwin_arm64

動作確認

Quick start tutorialにしたがって動作確認を実施。

Docker Desktopの起動と作業ディレクトリの作成:

$ open -a Docker
$ mkdir test && cd test

テスト用のマニフェストファイル(main.tf)の作成:

terraform {
    required_providers {
        docker = {
            source  = "kreuzwerker/docker"
            version = "~> 2.15.0"
        }
    }
}

provider "docker" {}

resource "docker_image" "nginx" {
    name = "nginx:latest"
    keep_locally = false
}

resource "docker_container" "nginx" {
    image = docker_image.nginx.latest
    name  = "tutorial"
    ports {
        internal = 80
        external = 8000
    }
}

main.tfでTerraformのInitialize:

$ terraform init

terraform initを実行すると、Terraformのワーキングディレクトリが作成される:

$ tree -a .
.
├── .terraform
│   └── providers
│       └── registry.terraform.io
│           └── kreuzwerker
│               └── docker
│                   └── 2.15.0
│                       └── darwin_arm64
│                           ├── CHANGELOG.md
│                           ├── LICENSE
│                           ├── README.md
│                           └── terraform-provider-docker_v2.15.0
├── .terraform.lock.hcl
└── main.tf

Docker Desktopを起動してmain.tfをApplyすると、テスト用のNginxコンテナが起動する:

$ open -a Docker
$ terraform apply

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

Nginxコンテナが起動していることを確認:

$ docker ps
CONTAINER ID   IMAGE          COMMAND                  CREATED              STATUS              PORTS                  NAMES
74241ca394eb   eeb9db34b331   "/docker-entrypoint.…"   About a minute ago   Up About a minute   0.0.0.0:8000->80/tcp   tutorial
$ curl -o /dev/null -s -w '%{http_code}\n' https://www.google.co.jp
200

テスト環境の削除

main.tfを配置したディレクトリでterraform destroyコマンドで環境を削除:

$ terraform destroy
docker_image.nginx: Refreshing state... [id=sha256:eeb9db34b33190cac170b27d857e9b23511d396a2609c1a54e93025634afed0anginx:latest]
docker_container.nginx: Refreshing state... [id=74241ca394eb095063b2cd2565725b0e72108cc4c6c0f5985b507506a3fc12ed]

Terraform used the selected providers to generate the following execution plan. Resource actions are
indicated with the following symbols:
  - destroy
...
Do you really want to destroy all resources?
  Terraform will destroy all your managed infrastructure, as shown above.
  There is no undo. Only 'yes' will be accepted to confirm.

  Enter a value: yes
...