Terraform AWS S3 到 Lambda 通知触发器

Question

我正在尝试编写要使用 S3 触发的 lambda 函数。 Lambda 函数创建成功，但“aws_s3_bucket_notification”资源在terraform:apply 失败，MethodNotAllowed 错误，status code 405：

Error: Error applying plan:
20-Sep-2018 15:23:53    1 error(s) occurred:
20-Sep-2018 15:23:53    * aws_s3_bucket_notification.my-trigger: 1 error(s) occurred:
20-Sep-2018 15:23:53    * aws_s3_bucket_notification.my-trigger: Error putting S3 notification configuration: MethodNotAllowed: The specified method is not allowed against this resource.
20-Sep-2018 15:23:53            status code: 405, request id:<hidden>, host id:<hidden>

这是我设置通知触发器的代码：

resource "aws_s3_bucket_notification" "my-trigger" {
  bucket = "my-bucket"

  lambda_function {
    lambda_function_arn = "${aws_lambda_function.my-function.arn}"
    events              = ["s3:ObjectCreated:*"]
    filter_prefix       = "file-prefix"
    filter_suffix       = "file-extension"
  }
}

这是从 S3 触发 Lambda 的权限：

resource "aws_lambda_permission" "s3-lambda-permission" {
  statement_id  = "AllowExecutionFromS3Bucket"
  action        = "lambda:InvokeFunction"
  function_name = "${aws_lambda_function.my-function.arn}"
  principal     = "s3.amazonaws.com"
  source_arn    = "arn:aws:s3:::my-bucket"
}

提前致谢！

Answer 1

所以我尝试了和你一样的设置，

...
// lambda resource

resource "aws_s3_bucket_notification" "my-trigger" {
    bucket = "my-bucket"

    lambda_function {
        lambda_function_arn = "${aws_lambda_function.my-function.arn}"
        events              = ["s3:ObjectCreated:*"]
        filter_prefix       = "AWSLogs/"
        filter_suffix       = ".txt"
    }
}

resource "aws_lambda_permission" "test" {
  statement_id  = "AllowS3Invoke"
  action        = "lambda:InvokeFunction"
  function_name = "${aws_lambda_function.my-function.arn}"
  principal = "s3.amazonaws.com"
  source_arn = "arn:aws:s3:::my-bucket"
}

...

我的 S3 存储桶策略是这样的：

{
    "Version": "2012-10-17",
    "Id": "AWSConsole-AccessLogs-Policy-1534800162725",
    "Statement": [
        {
            "Sid": "AWSConsoleStmt-1534800162725",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::123456789012:root"
            },
            "Action": "s3:PutObject",
            "Resource": "arn:aws:s3:::my-bucket/AWSLogs/123456789012/*"
        }
    ]
}

并且成功创建了 s3 通知。

所以我认为现在你应该检查两件事：

1. 确保您的 aws_lambda_permission 在您的 s3 通知之前实际创建。我使用的是 terraform 0.10.2，但之前的版本可能存在错误，因此在 s3 通知之前不会创建此 lambda 权限。

2. 检查您的 s3 存储桶策略。它可能明确拒绝 lambda 访问。如果有，请确保摆脱它们。