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DZone > Cloud Zone > Create a Subdomain Dynamically Using AWS Route 53 and Node.js

Create a Subdomain Dynamically Using AWS Route 53 and Node.js

Build your dynamic subdomain and map it to an S3 bucket with Node.js and AWS Route 53.

Vijaykishan Shyamsundar user avatar by
Vijaykishan Shyamsundar
·
Oct. 13, 19 · Cloud Zone · Tutorial
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Creating subdomains with AWS Route 53.

AWS provides the scalable, easy-to-use, and powerful DNS service Route 53. This service can be managed via the AWS Console or via API.

You may also enjoy:  How to Use Your Own Domain to Access an AWS-Hosted Website

Here we are going to see how to create a subdomain dynamically and map it to an S3 bucket using Node.js.

var AWS = require('aws-sdk')
var route53 = new AWS.Route53({ accessKeyId: cred.accesskey
secretAccessKey: cred.secretkey region: cred.region}); 


Let’s take the subdomain name from the command line argument:

var subDomainName = process.argv[2];

var params = {
  ChangeBatch: {
    Changes: [
      {
        Action: "CREATE",
        ResourceRecordSet: {
          AliasTarget: { 
            DNSName: "s3-website-us-east-1.amazonaws.com",
            EvaluateTargetHealth: false,
            HostedZoneId: "********" 
          },
          Name: subDomainName,
          Type: "A"
        }
      }
      Comment: "Testing subdomain creation "
      },
      HostedZoneId: "{Replace with your TLD HoztzoneID}"// Depends on the type of resource that you want to route traffic to
     };


Ensure you have a host zone created in Route 53.

Go to AWS Route 53, click "Hosted Zones" on the left-hand menu, and click "Create Hosted Zone." Enter your domain name, mark it public, and save.

The moment you create a hosted zone, you will get a HostZoneID:

Comment: "Testing subdomain creation "},
HostedZoneId: "{Replace with your TLD HoztzoneID}"// 


which is suppose to be used in the HostedZoneID mentioned in the Alias Target is of S3:

AliasTarget: {DNSName: "s3-website-us-east-1.amazonaws.com",
EvaluateTargetHealth: false,HostedZoneId: "********" } 


It is hardcoded. 

Let’s invoke the changeResourceRecordSets  API:

route53.changeResourceRecordSets(params, function(err, data) {

if (err) console.log(err, err.stack); // an error occurred

else console.log(data);


When you click on the HostedZone, you will see a successful subdomain created pointing to your S3 bucket. We need to ensure  Name: subDomainName is your bucket name, and you will have successfully created your subdomain.

Hope this helps.

In the next article, we will see how a static web hosting bucket can be created dynamically.

Further Reading


The Ultimate Solution for Your Website and Its Sub-Domain's Security 

Wildcard Subdomains in Windows Azure

AWS Node.js

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