Does Consul K8s Service Mesh Transparent Proxy support gRPC load balancing?

Consul
,
1

Dear guys, I would like to ask if currently the Transparent Proxy support for load balancing the gRPC service on K8s.
In my K8s lab, I have 2 gRPC server pods, and 1 gRPC client pod which calls continuously to the server. I also add a ServiceDefaults for the gRPC server like below:

apiVersion: consul.hashicorp.com/v1alpha1
kind: ServiceDefaults
metadata:
name: greeterserver
spec:
protocol: ‘grpc’

‘consul.hashicorp.com/transparent-proxy’: ‘true’ is set to the deployment file.
However, when the client started to call the server by using DNS “greeterserver.default.svc.cluster.local:8000”, only 1 pod received the traffic, the other didn’t receive anything.
When I used the service mesh without the Transparent Proxy, everything works well.
Please help!

2

Hi, this sounds like it could be a bug. Would you be able to open up an issue in GitHub - hashicorp/consul-k8s: First-class support for Consul and Kubernetes. Run Consul Service Mesh on Kubernetes, Sync services, and more. (you can just copy what you wrote here) and we can investigate.

3

Hi, thank you for your feedback. I could resolve this issue by update the CoreDNS and Consul to the latest version. I think that there was an issue when I configured the CoreDNS ConfigMap on K8s.

4

I’m not sure how updating CoreDNS fixed the problem but I’m glad you got this fixed!