What Is the Procedure for Configuring a Multi-AZ VPC in AWS, Including the Creation of Subnets in TypeScript

Introduction

In this guide, we will walk through the process of configuring a multi-AZ VPC in AWS using Pulumi and TypeScript. This setup will include the creation of subnets across multiple availability zones (AZs) to ensure high availability and fault tolerance.

Step-by-Step Explanation

Step 1: Install Pulumi and AWS SDK

1. Install Pulumi CLI if you haven’t already:

   curl -fsSL https://get.pulumi.com | sh
   

2. Install the Pulumi AWS package in your project:

   npm install @pulumi/aws
   

Step 2: Create a New Pulumi Project

1. Initialize a new Pulumi project:

   pulumi new typescript
   

2. Follow the prompts to set up your project.

Step 3: Define the VPC

1. In your index.ts file, import the necessary Pulumi and AWS libraries:

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

2. Create a new VPC:

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

Step 4: Create Subnets in Multiple AZs

1. Define the availability zones:

   const availabilityZones = ["us-west-2a", "us-west-2b", "us-west-2c"];
   

2. Create subnets in each AZ:

   const subnets = availabilityZones.map((az, index) => new aws.ec2.Subnet(`subnet-${index}`, {
       vpcId: vpc.id,
       cidrBlock: `10.0.${index}.0/24`,
       availabilityZone: az,
   }));
   

Step 5: Export the VPC and Subnet IDs

1. Export the VPC ID and subnet IDs:

   export const vpcId = vpc.id;
   export const subnetIds = subnets.map(subnet => subnet.id);
   

Summary

By following these steps, you have successfully configured a multi-AZ VPC in AWS using Pulumi and TypeScript. This setup ensures high availability and fault tolerance by distributing subnets across multiple availability zones. You can now use this VPC for deploying other AWS resources, ensuring they benefit from the high availability setup.

For more information, refer to the Pulumi AWS VPC documentation.

Full Code Example

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

// Create a new VPC
const vpc = new aws.ec2.Vpc("my-vpc", {
    cidrBlock: "10.0.0.0/16",
    enableDnsHostnames: true,
    enableDnsSupport: true,
});

// Define the availability zones
const availabilityZones = ["us-west-2a", "us-west-2b", "us-west-2c"];

// Create subnets in each AZ
const subnets = availabilityZones.map((az, index) => new aws.ec2.Subnet(\`subnet-\${index}\`, {
    vpcId: vpc.id,
    cidrBlock: \`10.0.\${index}.0/24\`,
    availabilityZone: az,
}));

// Export the VPC ID and subnet IDs
export const vpcId = vpc.id;
export const subnetIds = subnets.map(subnet => subnet.id);