Setting Up Domain Name Servers for EC2 Instances Within a VPC

Introduction

This guide will walk you through setting up Domain Name Servers (DNS) for EC2 instances within a Virtual Private Cloud (VPC) using Pulumi. We will leverage AWS services to create a VPC, subnets, and EC2 instances, and configure DNS settings for these instances.

Step-by-Step Explanation

Step 1: Create a VPC

First, we need to create a VPC. This will be the network within which our EC2 instances will reside.

Step 2: Create Subnets

Next, we will create subnets within the VPC. Subnets are used to segment the VPC into smaller networks.

Step 3: Create EC2 Instances

We will then create EC2 instances within the subnets. These instances will be the servers that we want to configure DNS for.

Step 4: Configure DNS Settings

Finally, we will configure the DNS settings for the EC2 instances. This involves setting up Route 53 to manage the DNS records for our instances.

Conclusion

By following these steps, you will have a VPC with EC2 instances that have DNS settings configured. This setup will allow you to manage the domain names for your instances efficiently.

Full Code Example

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

// Step 1: Create a VPC
const vpc = new aws.ec2.Vpc("my-vpc", {
    cidrBlock: "10.0.0.0/16",
});

// Step 2: Create Subnets
const subnet = new aws.ec2.Subnet("my-subnet", {
    vpcId: vpc.id,
    cidrBlock: "10.0.1.0/24",
});

// Step 3: Create EC2 Instances
const instance = new aws.ec2.Instance("my-instance", {
    ami: "ami-0c55b159cbfafe1f0", // Amazon Linux 2 AMI
    instanceType: "t2.micro",
    subnetId: subnet.id,
    tags: {
        Name: "my-instance",
    },
});

// Step 4: Configure DNS Settings
const zone = new aws.route53.Zone("my-zone", {
    name: "example.com",
});

const record = new aws.route53.Record("my-record", {
    zoneId: zone.id,
    name: "my-instance.example.com",
    type: "A",
    ttl: 300,
    records: [instance.publicIp],
});

export const vpcId = vpc.id;
export const subnetId = subnet.id;
export const instanceId = instance.id;
export const dnsName = record.fqdn;