Regional custom domain name on Edge API Gateway API

Question

Hi,

I would like to setup the following:

1. Route53 latency-based routing to API in API Gateway
2. Route53 health check for the latency records to automatically failover
3. API Gateway with Lambdas in 2 regions
4. Lambdas are hosted in private VPCs with NAT Gateways in 2 AZs in each region

For the API Gateway, I want to use an EDGE endpoint because the latency is considerably less than with REGIONAL. I was able to set this up, but then I need to use REGIONAL custom domain names since EDGE custom domain names are global and the same domain name cannot be used in 2 different regions.

Will this work correctly or is this problematic?
Is there any drawback/issue to mixing REGIONAL custom domain names with EDGE APIs?
Is there a better/recommended way to set this up?

Thanks!

Accepted Answer

According to Amazon Q:

> Yes, you can create a regional custom domain linked to an edge REST API in API Gateway. 
>
> To do so:
>
> 1. Request or import an SSL/TLS certificate for the domain from AWS Certificate Manager (ACM). The certificate must be requested/imported in the same region as your API.
> 
> 2. Create the custom domain name for your edge REST API in API Gateway. Select the ACM certificate created in step 1. 
>
> 3. Create a DNS record (e.g. CNAME) to route traffic from your custom domain to the API's edge hostname. 
>
> 4. Test your API by making requests using the custom domain name. Traffic will be routed through CloudFront to the edge API endpoint.
>
> The key difference between regional and edge custom domains is that edge domains use CloudFront for routing, while regional domains route directly to the regional API endpoint.
>
> Refer to the API Gateway documentation for more details on setting up custom domains for REST and other API types. Let me know if you have any other questions!
>
> Sources
>
> [1] [Setting up a regional custom domain name in API Gateway - Amazon API Gateway] (https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-regional-api-custom-domain-create.html)
>
> [2] [How can I set up a custom domain name for my API Gateway API?] (https://repost.aws/knowledge-center/custom-domain-name-amazon-api-gateway)

Regional custom domain name on Edge API Gateway API

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