Support ingress-nginx Canary ?

[chzhuo]

https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/#canary

[gxthrj]

https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/annotations/#canary

Yes, this is a useful annotation. At present, we support it by means of plug-ins. You can refer to the custom canary plug-in on the route or service through CRD (ApisixRoute & ApisixService).

The definition of annotation will be provided as a feature in the future, because we will rely on APISIX official canary plug-in support( @membphis ), and then we will provide both annotation and plugin ways .

[gxthrj]

Good news, the Apache APISIX community is discussing implementing a traffic-split plug-in, based on which canary can be implemented.

The discuss mail list is https://lists.apache.org/thread.html/rf02dc53a4af5d98d2513d89256b47466934d129af06d0bdcdb49cc8e%40%3Cdev.apisix.apache.org%3E

[gxthrj]

As traffic-split has been merged in apache/apisix#2935, we can support Canary now.
You can bind plugin in ApisixRoute or ApisixService to implement it.