Route traffic to AWS cloudfront issue: one or more of the CNAMEs you provided are already associated with a different resource

Question

I am trying to setup AWS Cloudfront distribution and route traffic from one of my subdomains to Cloudfront.

As per AWS documentation, I created and added a certificate to Cloudfront, then define alternative domain with that subdomain. However I always encountered this error:

I have checked thoroughly that I do not have another CNAME record which is associated with that subdomain.

I also tried to follow this guide from AWS to find any conflicting alias setup: https://aws.amazon.com/premiumsupport/knowledge-center/resolve-cnamealreadyexists-error/ but the problem is that my aws cli doesn't even have list-conflicting-aliases command. I am really stuck here. Any help will be appreciated. Thanks.

Answer 1

You will get this error if you've already used this subdomain in another AWS account.

Delete previous CloudFront distribution in that AWS account before you can create CloudFront distribution in the new account.

Answer 2

Helped out this document https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/CNAMEs.html#alternate-domain-names-move

1. Added DNS record like this:

   _www.example.com TXT d111111abcdef8.cloudfront.net

2. Moved CNAME with the command:

   aws cloudfront associate-alias --alias www.example.com --target-distribution-id EDFDVBD6EXAMPLE

My case was to move CNAME between CloudFront distributions within the same account, but the document also describes cross-account movement.