How do I create an AWS EC2 prefix list with Pulumi?

In this guide, we will create an AWS EC2 prefix list using Pulumi in TypeScript. A prefix list is a set of one or more CIDR blocks that can be referenced in security groups and route tables. This allows for easier management of IP ranges.

Step-by-Step Guide

1. Set up Pulumi and AWS provider: Ensure you have Pulumi installed and configured to use AWS.
2. Define the prefix list: Specify the CIDR blocks and other properties for the prefix list.
3. Create the prefix list resource: Use Pulumi to create the prefix list in AWS.

Below is the complete Pulumi program to create an AWS EC2 prefix list.

import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Define the prefix list entries
const prefixListEntries = [
    {
        cidr: "10.0.0.0/16",
        description: "Main office network",
    },
    {
        cidr: "192.168.1.0/24",
        description: "Branch office network",
    },
];

// Create the EC2 prefix list
const prefixList = new aws.ec2.ManagedPrefixList("examplePrefixList", {
    addressFamily: "IPv4",
    maxEntries: 2,
    entries: prefixListEntries,
    tags: {
        Name: "examplePrefixList",
    },
});

// Export the prefix list ID
export const prefixListId = prefixList.id;

Key Points

• Prefix List Entries: Defined as an array of objects, each containing a CIDR block and a description.
• ManagedPrefixList Resource: Created using the aws.ec2.ManagedPrefixList class, specifying the address family, maximum entries, and the entries themselves.
• Tags: Added for better resource management and identification.

Summary

We created an AWS EC2 prefix list using Pulumi in TypeScript. The prefix list includes multiple CIDR blocks, making it easier to manage IP ranges in security groups and route tables. This approach simplifies network management and enhances security by centralizing IP range definitions.