AWS API Gateway with VPC Load Balancer redirects to incorrect path (prefix not omitted)

Question

I want to use API Gateway to route between multiple microservices. E.g: domain.com/app1, domain.com/app2 etc.

• Each service has an internal Application Load Balancer (ALB).
• API Gateway has a VPC Link configured correctly.

The problem is that routes such as domain.com/app1/hello are redirected to internal.app1/app1/hello instead of internal.app1/hello.

• Notice that the prefix app1 is not removed.

It can be solved when I use HTTP redirection in API Gateway, but that requires an external load balancer which I want to avoid. I didn't see an option to use path variables with private ALB integration.

Please advise. Thank you in advance.

Answer 1

Problem is solved.

The solution is to use a REST API Gateway (instead of HTTP Gateway) integrated with a Network Load Balancer (NLB) via a VPC Link.

The AWS REST API in AWS API Gateway allows using path variables with private integration (in this case, the NLB).

Summary of the solution:

• API Gateway REST API
• Private Network Load Balancer
• REST API VPC Link (to the NLB)
• Use a proxy resource with private integration in the routes configuration