main.tf のコード例

terraform {
    # AWSプロバイダーのバージョン指定
    required_providers {
        aws = {
            source  = "hashicorp/aws"
            version = "~> 4.51.0"
        }
    }
    # tfstateファイルをS3に配置する(配置先のS3は事前に作成済み)
    backend s3 {
        bucket = "terraform-yumainaura" # S3バケット名
        region = "ap-northeast-1"
        key    = "tf-test.tfstate"
    }
}

# AWSプロバイダーの定義
provider aws {
    region = "ap-northeast-1"
}

# EC2の作成
resource aws_instance ec2 {
    ami           = "ami-0bba69335379e17f8" # Amazon マシンイメージ
    instance_type = "t2.micro"
    tags = {
        Name = "tf-test"
    }
}

AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY を認識できていない場合 (init)

オフラインでも起こるエラー
main.tf に直接 KEY / SECRET を書くやり方だとこのエラーが起きていた

$ terraform init

Initializing the backend...
╷
│ Error: error configuring S3 Backend: no valid credential sources for S3 Backend found.
│
│ Please see https://www.terraform.io/docs/language/settings/backends/s3.html
│ for more information about providing credentials.
│
│ Error: NoCredentialProviders: no valid providers in chain. Deprecated.
│ 	For verbose messaging see aws.Config.CredentialsChainVerboseErrors
│
│
│
╵

AWS S3でバケットが存在しない場合 (init)

AWS_ACCESS_KEY_ID=xxx AWS_SECRET_ACCESS_KEY=yyy AWS_DEFAULT_REGION=ap-northeast-1 terraform init --migrate-state

Initializing the backend...
Backend configuration changed!

Terraform has detected that the configuration specified for the backend
has changed. Terraform will now check for existing state in the backends.

╷
│ Error: Error inspecting states in the "s3" backend:
│     S3 bucket does not exist.
│
│ The referenced S3 bucket must have been previously created. If the S3 bucket
│ was created within the last minute, please wait for a minute or two and try
│ again.
│
│ Error: NoSuchBucket: The specified bucket does not exist
│ 	status code: 404, request id: XSR798EMBAG06B70, host id: 2Pq7S6nh04co2JuD5bvpQfAe6kNnOTcYxoyEDubL32iQfu6WTFxxS5LTv7qtQZe5kGZL8Qh/w/k=
│
│
│ Prior to changing backends, Terraform inspects the source and destination
│ states to determine what kind of migration steps need to be taken, if any.
│ Terraform failed to load the states. The data in both the source and the
│ destination remain unmodified. Please resolve the above error and try again.
│
│
╵

AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY の認証情報が間違っている場合 (init)

AWS_ACCESS_KEY_ID=xxx AWS_SECRET_ACCESS_KEY=yyy AWS_DEFAULT_REGION=ap-northeast-1 terraform init


Initializing the backend...
╷
│ Error: error configuring S3 Backend: error validating provider credentials: error calling sts:GetCallerIdentity: InvalidClientTokenId: The security token included in the request is invalid.
│ 	status code: 403, request id: 6997596f-6935-4323-b732-498833c01f0f
│
│

AWSでS3権限がない場合 (init)

AWS_ACCESS_KEY_ID=xxx AWS_SECRET_ACCESS_KEY=yyy AWS_DEFAULT_REGION=ap-northeast-1 terraform init

Initializing the backend...
Error refreshing state: AccessDenied: Access Denied
	status code: 403, request id: QEFSBRJ21TZCYTYH, host id: 72Qe8Vfz8mwzaCPil9yBAwFSBgomqccKgs+e7kftuXYDcoZqzOmRlFv3HeowawLejCJbEXBcBIw=

AWSでEC2権限がない場合 (apply)

$ AWS_ACCESS_KEY_ID=xxxY AWS_SECRET_ACCESS_KEY=yyy AWS_DEFAULT_REGION=ap-northeast-1 terraform apply

aws_instance.ec2: Refreshing state... [id=i-07fa99fc63ad81002]

╷
│ Error: reading EC2 Instance (i-07fa99fc63ad81002): UnauthorizedOperation: You are not authorized to perform this operation.
│ 	status code: 403, request id: f8df261f-6205-49a3-8585-f6d74adbc4ef
│
│   with aws_instance.ec2,
│   on main.tf line 26, in resource "aws_instance" "ec2":
│   26: resource aws_instance ec2 {
│
╵

環境

Terraform v1.3.7
on darwin_amd64
+ provider registry.terraform.io/hashicorp/aws v4.51.0

参考

tfファイルの例を参考にした(というかほとんど例そのままで試した)

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