创建 aws_db_subnet_group 与 terraform throw 创建数据库子网组时出错：InvalidParameterValue

Question

我正在使用 terraform 创建 RDS 实例，为此我需要有一个aws_db_subnet_group资源。我可以使用 Amazon 网站创建的 aws_db_subnet_group 创建 RDS，但是当我尝试从 terraform 脚本创建 aws_db_subnet_group 时，我收到错误 InvalidParameterValue。

这是地形脚本：

resource "aws_db_subnet_group" "default" {
  name        = "cse-cr"
  description = "Private subnets for RDS instance"
  subnet_ids  = ["subnet-0c8764fcb28b04c8c", "subnet-0ca53ff9b621e2c89"]
}

这是错误：

 Error: Error applying plan:

1 error(s) occurred:

* aws_db_subnet_group.default: 1 error(s) occurred:

* aws_db_subnet_group.default: Error creating DB Subnet Group: InvalidParameterValue: Some input subnets in :[subnet-0ca53ff9b621e2c89, subnet-0c8764fcb28b04c8c] are invalid.
        status code: 400, request id: 66166ec8-9b79-41d3-bdf7-a5cdb66f5f95

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

我在互联网上看到了多个示例，我能看到的唯一区别是我使用的是由其他人而不是我的 Terraform 脚本创建的 2 个预先存在的子网。

命令的结果：

aws ec2 describe-subnets --subnet-ids subnet-0ca53ff9b621e2c89 subnet-0c8764fcb28b04c8c

{
    "Subnets": [
        {
            "AvailabilityZone": "us-east-1a",
            "AvailableIpAddressCount": 250,
            "CidrBlock": "10.112.173.0/24",
            "DefaultForAz": false,
            "MapPublicIpOnLaunch": false,
            "State": "available",
            "SubnetId": "subnet-0ca53ff9b621e2c89",
            "VpcId": "vpc-0ec46ccebc8108670",
            "AssignIpv6AddressOnCreation": false,
            "Ipv6CidrBlockAssociationSet": [],
            "Tags": [

            ]
        },
        {
            "AvailabilityZone": "us-east-1b",
            "AvailableIpAddressCount": 251,
            "CidrBlock": "10.112.174.0/24",
            "DefaultForAz": false,
            "MapPublicIpOnLaunch": false,
            "State": "available",
            "SubnetId": "subnet-0c8764fcb28b04c8c",
            "VpcId": "vpc-0ec46ccebc8108670",
            "AssignIpv6AddressOnCreation": false,
            "Ipv6CidrBlockAssociationSet": [],
            "Tags": [

            ]
        }
    ]
}

Answer 1

首先尝试使用 aws_vpc 数据源，如下所示：

data "aws_subnet" "subnet1" {
  id = "subnet-0c8764fcb28b04c8c"
}

data "aws_subnet" "subnet2" {
  id = "subnet-0ca53ff9b621e2c89"
}

resource "aws_db_subnet_group" "default" {
  name        = "cse-cr"
  description = "Private subnets for RDS instance"
  subnet_ids  = [data.aws_subnet.subnet1.id, data.aws_subnet.subnet2.id]
}