index.ts

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

const baseTags = {
    "Project": "Demo"
};

let azs = aws.getAvailabilityZones();

let getAz = async function (index: number): Promise<string> {
    return (await azs).names[index];
};

const vpc = new aws.ec2.Vpc("vpc", {
    cidrBlock: "10.0.0.0/16",
    enableDnsHostnames: true,
    enableDnsSupport: true,
    tags: baseTags
});

const privateSubnets = ["10.0.1.0/24", "10.0.2.0/24", "10.0.3.0/24"].map((cidr, index) => {
    return new aws.ec2.Subnet(`subnet${index}`, {
        availabilityZone: getAz(index),
        cidrBlock: cidr,
        mapPublicIpOnLaunch: false,
        vpcId: vpc.id,
        tags: Object.assign({"Name": `Private Subnet ${index + 1}`}, baseTags)
    });
});

export const vpcId = vpc.id;
export const privateSubnetIds = privateSubnets.map((subnet) => subnet.id);