I am trying to create a custom Lambda authorizer that will be shared between a few different services/serverless stacks. If I understand the documentation here https://serverless.com/framework/docs/providers/aws/events/apigateway/#note-while-using-authorizers-with-shared-api-gateway, that means that I need to create a shared authorizer resource in a “common resources” service/serverless stack, and then refer to that shared authorizer from my other services. First of all: Is my understanding correct?
If my understanding is correct, my next question becomes: How do I do this? The documentation doesn’t provide a clear example for lambda authorizers, so here’s how I tried to customize it:
I don’t understand what the syntax for AuthorizerUri is supposed to be. I’ve tried “Ref: authorizerFunc”, “Fn::GetAtt: [authorizerFunc, Arn]” etc. to no avail.
When I get the authorizerUri working, do I just add an Output for my authorizer resource, then Fn::ImportValue it from the services containing my API Lambdas?