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gRPC load balancing

This repository includes demo source code and testing for series gRPC load balancing in this blog: https://notes-ngtam.pages.dev/posts/grpc-load-balancer

  • HAProxy as load balancer.
  • Service mesh in K8s with Istio and Envoy.
  • Lookaside load balancing with xDS Envoy.
  • Lookaside load balancing with Consul.
  • Headless service in K8s.

k3d

I use k3d to run k3s in local machine.

Please refer to readme file in folder k3d for details setup.

After running, verify cluster with command k3d cluster list

NAME          SERVERS   AGENTS   LOADBALANCER
local         1/1       2/2      true

If you have multiple cluster, you could switch between them with command kubectl config use-context k3d-<cluster_name>, and verify by kubectl config current-context.

k3d run a container as docker registry, so please make sure the port mapping to host machine is correct.

go task

I use go task to group multiple commands in one alias.

proto buf

Run command to generate gRPC code

    protoc --go_out=. --go-grpc_out=. ./model/service.proto