Hello everyone! I just deploy a cluster by rancher 2.5.12, but I don’t known where to set the container runtime, the default runtime is docker but I wanne switch to containerd, So any suggestion for me?

If you deploy a RKE cluster with Rancher the container runtime will always be Docker and if you use RKE2 it'll be containerd. So, when you choose RKE or RKE2 you are really choosing between Docker and Containerd (so that's why you are not asked for it in the UI).

Thanks for your help, have a good day~~