Caddy: A/B testing in Caddy?

[milewski]

Hello guys i am currently into a situation where i am trying to do A/B testing and i would like to ask if this is possible somehow in caddy? for example

proxy / {
 policy ip_hash
 to backend:8080 backend:9090
}

somehow what i am looking is to add "weight" so one server could receive 20% of the access and the other 80%

if i were to implement this in nginx this would be possible by adding:

 upstream appServer {
  ip_hash;
  server backend:8080 weight=8;
  server backend:9090;
 }

any thoughts?

[francislavoie]

One idea might be to put the same backend you want to have higher weight in extra times. Not sure if Caddy will collapse those as being the same though.

[mholt]

It shouldn't collapse them, it appends them to a list, so no de-duplication is being done (I'm pretty sure). For now, that will have to do. (Meaning, specify the backends with more weight multiple times.)