Async rate-limiting

[dudicoco]

Hi,

Is there a way to add async rate limiting instead of the blocking global rate limiting?

The request to the rate limit service would not block the request to the upstream, the envoy state would need to be modified by the rate limit service in case a descriptor need to be blocked.

It seems that the Rate Limit Quota feature in envoy might be doing something similar but i'm not sure if it's usable within the gateway.