如何将具有自定义域名的 API 网关迁移到另一个 AWS 账户？

Question

I have an API gateway with a custom domain name ( foo.mycompany.com ).

foo.mycompany.com belongs to the production environment, ie, there is traffic coming from the customers of the service almost every minute.

How can I migrate foo.mycompany.com to another AWS account without causing any downtime for the service?

When I create the foo.mycompany.com custom domain name in the AWS console of the new AWS account, I got The domain name you provided already exists. error.

Answer 1

Unfortunately it is not possible at the moment. I run a couple of API GW for high load clients and all had the same issue when migrating to new AWS accounts. We even reached to AWS specialists. The answer was :

1. Delete custom domain name in OLD account
2. Add custom domain in new account

This of course means downtime. If someone else finds a blue-green migration possibility for these - I would like to know too.

Answer 2

This works perfectly if you move to different region. The flow I used was

• switch api domain to edge
• create infrastructure in another region
• switch DNS to that other region - custom domain was already created there.

Unfortunately, custom API domain has to be unique in a region.

I am in similar situation as you now and I am trying to figure out solution.