Dynamically Configuring a Zuul Proxy during Runtime?

Question

I have a url path that looks like this:

/{identifier}/rest/of/resource/path

If the identifier is A then the request should go to service_I. If the identifier is B then the request should also go to service_I. If the identifier is C, then the request should go to service_II, and so on.

Later on a new identifiers M and N is added to the system and their requests should be routed to service_IV.

Is it possible to dynamically configure a Spring cloud zuul proxy to perform the tasks described above?

Edit

This question offered contains a different way to examine the question.

In it Zuul has the following configuration:

zuul:
  routes:
    <service_id>:
      path: /path/**

Zuul will collaborate with Eureka to find the service-id and return the host parameters so that the service can be accessed. What if instead of /path we have /{userID} and the userID instances are distributed across several service_id hosts?

Can Zuul / the DiscoveryClient query Eureka for both the service_id and the userID to figure out which host is hosting the particular userID?

Answer 1

You would need to write a custom ZuulFilter to accomplish this. Take a look at the PreDecorationFilter for some hints as this is the filter responsible for handling /path where the path is a service-id (among other things).