如何使用 Python 在 AWS CDK 中构造 DHCPOptionsAssociation答案

【问题标题】：How do I construct DHCPOptionsAssociation in AWS CDK using Python如何使用 Python 在 AWS CDK 中构造 DHCPOptionsAssociation
【发布时间】：2020-09-07 16:10:45
【问题描述】：

我有以下代码：

from aws_cdk import (
    aws_ec2 as ec2,
    core,
)

class MyVpcStack(core.Stack):
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
    super().__init__(scope, id, **kwargs)

    # The code that defines your stack goes here 
    vpc = ec2.Vpc(
        self, 'MyVpc',
        cidr='10.10.10.0/23',
        max_azs=2
    )

    dhcp_options = ec2.CfnDHCPOptions(
        self, 'MyDhcpOptions', 
        domain_name='aws-prod.mydomain.com', 
        domain_name_servers=['10.1.1.5','10.2.1.5'],
        ntp_servers=['10.1.1.250','10.2.1.250'],
    )

    dhcp_options_associations = ec2.CfnVPCDHCPOptionsAssociation(
        self, 'MyDhcpOptionsAssociation', 
        dhcp_options_id=dhcp_options.logical_id, 
        vpc_id=vpc.vpc_id
    )

它在 CloudFormation 模板中为此错误地生成 VPCDHCPOptionsAssociation 属性，如下所示：

  MyDhcpOptionsAssociation:
    Type: AWS::EC2::VPCDHCPOptionsAssociation
    Properties:
      DhcpOptionsId: MyDhcpOptions
      VpcId:
        Ref: myvpcAB8B6A91

我需要 CloudFormation 模板中的这个部分是这样的（正确）：

  MyDhcpOptionsAssociation:
    Type: AWS::EC2::VPCDHCPOptionsAssociation
    Properties:
      DhcpOptionsId: 
        Ref: MyDhcpOptions
      VpcId:
        Ref: myvpcAB8B6A91

如果我使用dhcp_options_id=dhcp_options.id，我会收到错误AttributeError: 'CfnDHCPOptions' object has no attribute 'id'。

如果我使用dhcp_options_id=dhcp_options.dhcp_options_id，我会收到错误AttributeError: 'CfnDHCPOptions' object has no attribute 'dhcp_options_id'。

这里是 CDK API 参考：https://docs.aws.amazon.com/cdk/api/latest/python/aws_cdk.aws_ec2/CfnVPCDHCPOptionsAssociation.html

【问题讨论】：

标签： python python-3.x amazon-cloudformation aws-cdk

【解决方案1】：

我找到了。它必须是.ref，但与其他资源属性不一致。

dhcp_options_associations = ec2.CfnVPCDHCPOptionsAssociation(
    self, 'MyDhcpOptionsAssociation', 
    dhcp_options_id=dhcp_options.ref, 
    vpc_id=vpc.vpc_id
)

【讨论】：