Load balancing in grpc

[Vladimir Petrov]

Just curious, how do you implement load balancing? Do you have some intermediate proxies or just round-robin over set of upstreams?

[Louis Ryan]

We will likely do both but for the moment you can use a proxy load balancer like HAProxy. Client-side load-balancing has definite performance advantages but makes deployment more complex in general.

I'm going to post a Gist on how to use HAProxy in the next few days but it's not particularly complex. This would be Layer-3 for the moment, when there's a viable Layer-7 option we'll post about that.

[huzhon...@gmail.com]

i want to know whether you have post about the Gist on how to use HAProxy. Thanks!

[Louis Ryan]

It's really nothing special, just need to configure ALPN and make the right certs available...

defaults

  log global

  option tcplog

  timeout connect           4s

  timeout server          300s

  timeout client          300s

# accept connections on port 443 (SSL)

# - forward HTTP/2 connections to grpc_cluster

# - ha.pem should be a concatenated file: certificate first then the key

frontend grpc

  mode tcp

  # advertise http/2 support via ALPN

  bind :9992 ssl crt consolidated.pem alpn h2-17,h2-16

  default_backend grpc_server

# GRPC servers running on port 10000

backend grpc_server

  server srv01 127.0.0.1:8080

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