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AWSキーペアにED25519形式の鍵ファイルを作成してTerraformで公開鍵を登録する

Last updated at Posted at 2024-07-19

AWSキーペアに登録するキーペアの作成方法をよく失念するので、一連の流れを備忘録として整理。

  1. AWSキーペアに登録するためのキーペア(ED25519)を作成する
    個人的には強度の強いED25519を使っています

    ssh-keygen -t ed25519 -C "公開鍵に記載されるコメント"
    

    保存先のパスとパスフレーズ(確認も含め)を入力すると、秘密鍵と公開鍵が作成されます。

  2. tfファイルでaws_key_pairリソースを作成する

    resource "aws_key_pair" "sample" {
      key_name   = "sample"
      public_key = "ssh-ed25519XXXXXXXXXXXXX"
    }
    

    publik_keyには1で作成された公開鍵(.pub)の値をコピーする

  3. Terraformでplanしてみて意図したものになっているか確認する

    % terraform plan
    〜省略〜
    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_key_pair.sample will be created
      + resource "aws_key_pair" "sample" {
          + arn             = (known after apply)
          + fingerprint     = (known after apply)
          + id              = (known after apply)
          + key_name        = "sample"
          + key_name_prefix = (known after apply)
          + key_pair_id     = (known after apply)
          + key_type        = (known after apply)
          + public_key      = "ssh-ed25519XXXXXXXXXXXXX"
          + tags_all        = (known after apply)
        }
    
    Plan: 1 to add, 0 to change, 0 to destroy.
    
    ─────────────────────────────────────────────────────────────────────────────────────────────────
    
    Note: You didn't use the -out option to save this plan, so Terraform can't guarantee to take exactly these actions if you run "terraform apply" now.
    
  4. TerraformでApplyする
    Terraform Cloudを使っています
    Apply画面

  5. AWS EC2 - キーペア上にもリソースが作成されていることが確認できます

    スクリーンショット 2024-07-19 14.40.42.png

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