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【AWS】terraform で EC2を作成しようとしたところ InvalidGroup.NotFound が出る

Last updated at Posted at 2024-08-14

概要

以下のterraformでEC2を作ろうとしたところSGグループが見つからない旨のエラーが出現

tfファイル

resource "aws_instance" "dev_test_01" {
  ami                  = "ami-"
  availability_zone    = "ap-northeast-1a"
  iam_instance_profile = "SSM_access_for_EC2"
  instance_type        = "t2.micro"
  key_name             = "dev-test-01"
  private_ip           = "192.168.10.1"
  subnet_id            = "subnet-"
  security_groups = ["ec2-1", "ec2-2"]
  tags = {
    Name = "dev-test-01"
  }
  vpc_security_group_ids = ["sg-1", "sg-2", "sg-3"]

  root_block_device {
    volume_size = 8
    volume_type = "gp3"
  }
}

エラーメッセージ

Error: creating EC2 Instance: operation error EC2: RunInstances, https response error StatusCode: 400, RequestID: , api error InvalidGroup.NotFound: The security group 'ec2-1' does not exist in VPC 'vpc-'

解決方法

security_groupsを削除する

解決方法の理由

security_groups属性はEC2-Classicネットワークで使用されるもので、VPC内のインスタンスには適していません。一方、vpc_security_group_idsはVPC内のセキュリティグループを直接指定するために使用されます。VPC環境では、セキュリティグループはVPCに紐づいているため、vpc_security_group_idsを使用することで、正しいVPC内のセキュリティグループを確実に指定できます。

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