当其私有子网已存在时，使用CDK (typescript)向路由表添加条目

import * as ec2 from 'aws-cdk-lib/aws-ec2';
import * as cdk from 'aws-cdk-lib';
import * as aws from 'aws-sdk';

const app = new cdk.App();
const stack = new cdk.Stack(app, 'MyStack');

const subnetId = 'your-subnet-id';
const routeTableId = 'your-route-table-id';

const vpc = ec2.Vpc.fromLookup(stack, 'Vpc', { vpcId: 'your-vpc-id' });
const instance = new ec2.Instance(stack, 'Instance', {
  vpc,
  instanceType: ec2.InstanceType.of(ec2.InstanceClass.T2, ec2.InstanceSize.MICRO),
  machineImage: ec2.MachineImage.latestAmazonLinux(),
  vpcSubnets: { subnetId },
});

const ec2Client = new aws.EC2();
const params = {
  RouteTableId: routeTableId,
  DestinationCidrBlock: '0.0.0.0/0',
  InstanceId: instance.instanceId,
};

ec2Client.createRoute(params, (err, data) => {
  if (err) {
    console.log(err, err.stack);
  } else {
    console.log(data);
  }
});