how to point AWS Route53 subdomain to AWS Lightsail instance?

Question

I have setup a Wordpress on Lightsail, and have created a static IP which I can access WP ok.

I have migrated my .co.uk domain across to Route53 from another provider and am trying to point blog.example.co.uk to my Lightsail instance.

In Lightsail I have setup a DNS record like this:

A   example.co.uk           12.34.56.78
A   blog.example.co.uk      12.34.56.78

It then lists these DNS servers in Lightsail:

ns-849.awsdns-42.net
ns-1643.awsdns-13.co.uk
ns-341.awsdns-42.com
ns-1516.awsdns-61.org

I've taken those DNS servers and set on the root of my domain in Route 53 under Domains > Registered Domains

I am not sure if that was the correct thing to do, as I will have other subdomains eventually that will point elsewhere, should the Lightsail DNS servers be added at that level? If not, what do I set them back to be?

I have also created a Route53 Hosted Zone, and have created an "A" entry that links blog.example.co.uk to 12.34.56.78, is that required?

Answer 1

As mentioned in the comments, I was facing the same challenge.

What ended up working for me was simply creating an Alias Record ( A ) for my subdomain, subdomain.example.com , that points to the static IP of my Lightsail instance.

I did not add Lightsail's DNS servers anywhere on Route53.

I made sure that the NS entries for my root domain – example.com – pointed to the Name servers entries on my registered domain in Route53.

You can find the name servers associated with your Route53 registered domain by going to Registered domains > mydomain.com ; they're located on the upper-right corner.