S3のバケットをオリジンにしてCloudFrontで配信する構成の際にCORSの設定をTerraformで行う方法のまとめ。 ちなみに、Terraformではなくマネジメントコンソールから設定する場合は以下のQiitaの記事がわかりやすくておすすめです。
S3バケットにCORS設定を追加
オリジンにする『aws_s3_bucket』リソースにCORSの設定を追加します。
- 以下、『https://kleinblog.net』からのクロスオリジンを許可する例
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| # オリジンのS3にCORSの設定を追加 | |
| resource "aws_s3_bucket" "origin_bucket" { | |
| bucket = "origin_bucket" | |
| acl = "public-read" | |
| # ここに追加 | |
| cors_rule { | |
| allowed_headers = ["*"] | |
| allowed_methods = ["GET", "HEAD"] | |
| allowed_origins = ["https://kleinblog.net"] | |
| max_age_seconds = 0 | |
| } | |
| } |
CloudFrontのWhitelist Headersに『Origin』を追加
CloudFrontのホワイトリストにOriginを追加します。
- キャッシュ設定のforwarded_valuesに書く
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| # CloudFrontにヘッダー転送を追加 | |
| resource "aws_cloudfront_distribution" "distribution" { | |
| origin { | |
| domain_name = "${aws_s3_bucket.origin_bucket.bucket_regional_domain_name}" | |
| origin_id = "origin_bucket_id" | |
| s3_origin_config { | |
| origin_access_identity = "origin-access-identity/cloudfront/ABCDEFG1234567" | |
| } | |
| } | |
| enabled = true | |
| default_cache_behavior { | |
| allowed_methods = ["DELETE", "GET", "HEAD", "OPTIONS", "PATCH", "POST", "PUT"] | |
| cached_methods = ["GET", "HEAD"] | |
| target_origin_id = "${local.s3_origin_id}" | |
| forwarded_values { | |
| query_string = false | |
| # ここにOriginを追加 | |
| headers = ["Origin"] | |
| cookies { | |
| forward = "none" | |
| } | |
| } | |
| viewer_protocol_policy = "allow-all" | |
| min_ttl = 0 | |
| default_ttl = 3600 | |
| max_ttl = 86400 | |
| } | |
| } |