InvalidParameterValueException：无法访问流

Question

我正在尝试使用 Terraform 创建 dynamodb table 和 lambda 触发器。这就是我定义 table、角色策略和 lambda 触发器的方式：

resource "aws_dynamodb_table" "filenames" {
  name           = local.dynamodb_table_filenames
  billing_mode   = "PROVISIONED"
  read_capacity  = 1000
  write_capacity = 1000
  hash_key       = "filename"
  stream_enabled = true
  stream_view_type = "NEW_IMAGE"

  #range_key      = ""

  attribute {
    name = "filename"
    type = "S"
  }

  tags = var.tags
}

resource "aws_iam_role_policy" "dynamodb_policy" {
  policy = jsonencode(
  {
    Version: "2012-10-17",
    Statement: [
      {
        Action: [
          "dynamodb:GetItem",
          "dynamodb:PutItem",
          "dynamodb:UpdateItem",
          "dynamodb:Query",
          "dynamodb:GetRecords",
          "dynamodb:GetShardIterator",
          "dynamodb:DescribeStream",
          "dynamodb:ListShards",
          "dynamodb:ListStreams",
        ],
        Effect: "Allow",
        Resource: aws_dynamodb_table.filenames.arn
      }
    ]
  }
  )
  role = aws_iam_role.processing_lambda_role.id
}

resource "aws_lambda_event_source_mapping" "allow_dynamodb_table_to_trigger_lambda" {
  event_source_arn  = aws_dynamodb_table.filenames.stream_arn
  function_name     = aws_lambda_function.trigger_stepfunction_lambda.arn
  starting_position = "LATEST"
}

即使我已经在角色中添加了相关策略，我仍然收到此错误：

error creating Lambda Event Source Mapping (arn:aws:dynamodb:eu-central-12:table/tablename/stream): InvalidParameterValueException: Cannot access stream arn:aws:dynamodb:eu-central-1:299093934558:table/4tablename/stream. Please ensure the role can perform the GetRecords, GetShardIterator, DescribeStream, ListShards, and ListStreams Actions on your stream in IAM.

我该如何解决这个问题？

Answer 1

流操作适用于流，不适用于表。流的 ARN 的 form 为：

arn:${Partition}:dynamodb:${Region}:${Account}:table/${TableName}/stream/${StreamLabel}

因此，您应该使用（或等效的东西）：

Resource: "${aws_dynamodb_table.filenames.arn}/stream/*"

或更一般：

Resource: "${aws_dynamodb_table.filenames.arn}/*"

InvalidParameterValueException：无法访问流

InvalidParameterValueException: Cannot access stream

amazon-web-services

amazon-dynamodb

aws-lambda

terraform

terraform-provider-aws