terraformの使い方

インストール

macOS (Homebrewを使う場合)

brew install terraform

バージョンの確認

terraform version

Terraform v0.11.13

初期化

terraform init を使って初期化します。

terraform init

[0m[1mTerraform initialized in an empty directory![0m

The directory has no Terraform configuration files. You may begin working
with Terraform immediately by creating Terraform configuration files.[0m

planを実行

terraform plan

[0m[1mRefreshing Terraform state in-memory prior to plan...[0m
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.
[0m

------------------------------------------------------------------------

[0m[1m[32mNo changes. Infrastructure is up-to-date.[0m[32m

This means that Terraform did not detect any differences between your
configuration and real physical resources that exist. As a result, no
actions need to be performed.[0m

適応する

applyコマンドを使って

terraform apply -input=false

[0m[1m[32m
Apply complete! Resources: 0 added, 0 changed, 0 destroyed.[0m

tfstateファイルができる

terraformはリソースの状態を terraform.tfstate というファイルの中に記述することで管理をしています。中身はこのようなjsonファイルです。

{
    "version": 3,
    "terraform_version": "0.11.13",
    "serial": 1,
    "lineage": "4c522adb-b827-5753-c96b-6cc88a640a13",
    "modules": [
        {
            "path": [
                "root"
            ],
            "outputs": {},
            "resources": {},
            "depends_on": []
        }
    ]
}