I understand the concept behind an API gateway as described by Richardson:
http://microservices.io/patterns/apigateway.html
But what is the difference to an Edge service. Is this a concrete implementation of the API gateway pattern?
Technically, an API Gateway is the API exposed to the public (REST, etc.), and an Edge Service is a service running on the API resolving the proxying, routing, etc. There could be many edge services on the Gateway. But practically there is usually only one service, logic, on the Gateway thus API Gateway = Edge Service.
来源：https://stackoverflow.com/questions/46002727/what-is-the-difference-between-an-api-gateway-and-an-edge-service