Can ESPv2 be used as a reverse proxy with DNS load balancer for microservices in GKE?

[Julius Bartkus]

Hello,

we have a bunch of microservices running on GKE together with ESPv2 as a sidecar. All internal communication is done through GRPC. ESPv2 does an amazing job with logging, tracing, authentication, etc. However, it would be great if ESPv2 could solve the load-balancing for GRPC communication.

Is it possible to use/configure ESPv2 as a reverse proxy so that envoy does health checking on DNS for headless services and routes all communication to healthy pods? If not, is it something on a roadmap of ESPv2? 

Thank you!

Best regards,

Julius 

[Wayne Zhang]

Unfortunately,  ESPv2 doesn't support load balancing feature.  

If you use ESPv2 as a side-car for inbound traffic,  the backend is localhost in the same pod.  No need for such a feature

If you want to use ESPv2 for outbound traffic, then you need such a feature.  But then, you are talking about a service mesh,   

It only also needs to solve service discovery and load balancing, but also traffic interception.  I think Istio is better suited for this. 

I don't think ESPv2 wants to compete with Istio.

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