I have Rancher 2.14.2 that is running on 3 nodes RKE2 1.34.9 Also have a downstream cluster that is RKE2 1.34.9 All of these are on RHEL 9.6 My question is if I upgrade RKE2 to 1.35.6 will this remove/uninstall Ingress-NGINX and install Traefik? Or it will keep Ingress-NGINX alone? I know Ingress-NGINX is dead and we need to move to Traefik,. So, our transition plan is to create new RKE2 cluster with Traefik and migrate the workloads so that way we can properly test and move the apps with - hopefully - as little hickcups as possible.

if you have ingress-nginx, it’ll stay there. We will never remove it. It won’t get any more upgrades, and it’ll be a massive vulnerability, but you’ll still have it.