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backend.tf
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terraform {
backend "s3" {
key = "global/s3/terraform.tfstate"
region = "ap-northeast-1"
encrypt = true
dynamodb_table = "blog-infra-lock"
}
}
resource "aws_dynamodb_table" "lock" {
name = var.dynamodb_lock_name
billing_mode = "PAY_PER_REQUEST"
hash_key = "LockID"
attribute {
name = "LockID"
type = "S"
}
tags = {
Name = "lock-${local.name_suffix}"
}
}
resource "aws_s3_bucket" "backend" {
bucket = var.s3_backend_bucket_name
lifecycle {
prevent_destroy = true
}
tags = {
Name = "${var.s3_backend_bucket_name}-${local.name_suffix}"
}
}
resource "aws_s3_bucket_versioning" "backend" {
bucket = aws_s3_bucket.backend.id
versioning_configuration {
status = "Enabled"
}
}
resource "aws_s3_bucket_server_side_encryption_configuration" "backend" {
bucket = aws_s3_bucket.backend.id
rule {
apply_server_side_encryption_by_default {
sse_algorithm = "AES256"
}
}
}
resource "aws_s3_bucket_public_access_block" "backend" {
bucket = aws_s3_bucket.backend.id
block_public_acls = true
block_public_policy = true
ignore_public_acls = true
restrict_public_buckets = true
}
resource "aws_s3_bucket_policy" "for_s3_backend" {
bucket = aws_s3_bucket.backend.id
policy = data.aws_iam_policy_document.for_s3_backend.json
}
data "aws_iam_policy_document" "for_s3_backend" {
statement {
principals {
type = "AWS"
identifiers = [data.aws_caller_identity.self.account_id]
}
actions = [
"s3:GetObject",
"s3:DeleteObject",
"s3:ListBucket",
"s3:PutObject",
]
resources = [
aws_s3_bucket.backend.arn,
"${aws_s3_bucket.backend.arn}/global/s3/terraform.tfstate",
]
}
}