The setup for a custom domain involves two steps: setting up a DNS record to point to that domain, and then deploying your application to deploy to that domain:

DNS Setup

You must first find the DNS name assigned to the load balancer of your cluster. This can be found by navigating to the Porter dashboard and copying the load balancer address:

Ingress IP Address

Amazon Web Services

On EKS, the load balancer will be a domain name, rather than an IP address. The next steps depend on whether you are setting up a domain apex (i.e. root domain) or a subdomain:

  • Apex Domain

  • Subdomain

Because AWS creates a load balancer that is assigned a domain name, rather than an IP address, you must use a DNS provider which allows for ALIAS records, since CNAME records are not supported for apex domains. Create an ALIAS record for your root domain which points to the load balancer address that you copied above.

If you’ve purchased your domain through a service like GoDaddy or Namecheap that does not support ALIAS records, we recommend that you switch your service to Route 53: please follow this guide to manage your existing domains with Route 53, and then see the instructions below for Route 53 setup.

Route 53 Instructions

When creating a new record, leave the Record name empty and select the Alias to Network Load Balancer option. After you choose the region your EKS cluster is provisioned in, you will be able to select the URL you’ve copied from Step 2 from the dropdown menu. Set Record type as A record and create the record.

A Record

Once DNS has propagated, you can now deploy your application using the custom domain!

After you complete the previous steps, it might take up to 30 minutes for DNS records to fully propagate. Please wait before deploying your applications until the DNS propagation is complete. You can check this using tools like or running nslookup <your-domain>.

Deploying on the Custom Domain

To deploy an application on the domain, make sure the Expose to external traffic option is set add your domain in the Configure Custom Domain section, as follows:

Custom Domain Deployment

That’s it! Your application should be running on your custom domain within a few minutes.

If you experience SSL certificate errors, see the SSL Certificates doc for debugging SSL certificate errors.