Vpc Ipv4Cidr Block Association
    Provides a resource to associate additional IPv4 CIDR blocks with a VPC. When a VPC is created, a primary IPv4 CIDR block for the VPC must be specified. The aws.ec2.VpcIpv4CidrBlockAssociation resource allows further IPv4 CIDR blocks to be added to the VPC.
Example Usage
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";
const main = new aws.ec2.Vpc("main", {cidrBlock: "10.0.0.0/16"});
const secondaryCidr = new aws.ec2.VpcIpv4CidrBlockAssociation("secondary_cidr", {
    vpcId: main.id,
    cidrBlock: "172.20.0.0/16",
});Content copied to clipboard
import pulumi
import pulumi_aws as aws
main = aws.ec2.Vpc("main", cidr_block="10.0.0.0/16")
secondary_cidr = aws.ec2.VpcIpv4CidrBlockAssociation("secondary_cidr",
    vpc_id=main.id,
    cidr_block="172.20.0.0/16")Content copied to clipboard
using System.Collections.Generic;
using System.Linq;
using Pulumi;
using Aws = Pulumi.Aws;
return await Deployment.RunAsync(() =>
{
    var main = new Aws.Ec2.Vpc("main", new()
    {
        CidrBlock = "10.0.0.0/16",
    });
    var secondaryCidr = new Aws.Ec2.VpcIpv4CidrBlockAssociation("secondary_cidr", new()
    {
        VpcId = main.Id,
        CidrBlock = "172.20.0.0/16",
    });
});Content copied to clipboard
package main
import (
	"github.com/pulumi/pulumi-aws/sdk/v6/go/aws/ec2"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)
func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		main, err := ec2.NewVpc(ctx, "main", &ec2.VpcArgs{
			CidrBlock: pulumi.String("10.0.0.0/16"),
		})
		if err != nil {
			return err
		}
		_, err = ec2.NewVpcIpv4CidrBlockAssociation(ctx, "secondary_cidr", &ec2.VpcIpv4CidrBlockAssociationArgs{
			VpcId:     main.ID(),
			CidrBlock: pulumi.String("172.20.0.0/16"),
		})
		if err != nil {
			return err
		}
		return nil
	})
}Content copied to clipboard
package generated_program;
import com.pulumi.Context;
import com.pulumi.Pulumi;
import com.pulumi.core.Output;
import com.pulumi.aws.ec2.Vpc;
import com.pulumi.aws.ec2.VpcArgs;
import com.pulumi.aws.ec2.VpcIpv4CidrBlockAssociation;
import com.pulumi.aws.ec2.VpcIpv4CidrBlockAssociationArgs;
import java.util.List;
import java.util.ArrayList;
import java.util.Map;
import java.io.File;
import java.nio.file.Files;
import java.nio.file.Paths;
public class App {
    public static void main(String[] args) {
        Pulumi.run(App::stack);
    }
    public static void stack(Context ctx) {
        var main = new Vpc("main", VpcArgs.builder()
            .cidrBlock("10.0.0.0/16")
            .build());
        var secondaryCidr = new VpcIpv4CidrBlockAssociation("secondaryCidr", VpcIpv4CidrBlockAssociationArgs.builder()
            .vpcId(main.id())
            .cidrBlock("172.20.0.0/16")
            .build());
    }
}Content copied to clipboard
resources:
  main:
    type: aws:ec2:Vpc
    properties:
      cidrBlock: 10.0.0.0/16
  secondaryCidr:
    type: aws:ec2:VpcIpv4CidrBlockAssociation
    name: secondary_cidr
    properties:
      vpcId: ${main.id}
      cidrBlock: 172.20.0.0/16Content copied to clipboard
Import
Using pulumi import, import aws_vpc_ipv4_cidr_block_association using the VPC CIDR Association ID. For example:
$ pulumi import aws:ec2/vpcIpv4CidrBlockAssociation:VpcIpv4CidrBlockAssociation example vpc-cidr-assoc-xxxxxxxxContent copied to clipboard
Properties
Link copied to clipboard
                The ID of an IPv4 IPAM pool you want to use for allocating this VPC's CIDR. IPAM is a VPC feature that you can use to automate your IP address management workflows including assigning, tracking, troubleshooting, and auditing IP addresses across AWS Regions and accounts. Using IPAM you can monitor IP address usage throughout your AWS Organization.