Hello everyone,
I'm looking into adding load balancing algorithms to traefik (like lowest response time, least utilized, etc.) as part of a research project. I want to do it in a way that the result could maybe find its way into the main tree at some point. I was hoping to get a couple of pointers on how to do it properly.
From my (albeit limited) understanding of the way HTTP load balancing is implemented in traefik, there are two layers: service and server load balancing. Service-level load balancing is implemented in traefik (e.g, the WRR or Mirror), wheres as on server-level traefik leverages the load balancing code (currently only round robin) of vulcand/oxy.
My first question is therefore: is the appropriate project for additional load balancing code on server level oxy or traefik? Our would both be fine? Is there a particular reason oxy was used for load balancing?
My second question: are there any existing proposals to extend the configuration to accommodate additional load balancing algorithms? I played around with the http_config.go and found that there are several ways the ServersLoadBalancer struct could be extended. For example, one could add an Algorithm container to hold the load balancer configuration. For example:
[http]
# ...
[http.services]
[http.services.myapp]
[http.services.myapp.loadBalancer]
[http.services.myapp.loadBalancer.algorithm.lowestResponseTime]
aggregate = "10"
epsilon = "10ms"
[[http.services.myapp.loadBalancer.servers]]
# ...
The algorithm container could be extended with specific algorithm configurations, the default being roundRobin that requires no configuration.
Hoping to get some feedback on this!
Cheers