Rancher rke k8s using TLS weak cipher suites issue

Thank you for reply!!
I try to find a way to configure ‘extra_args’ to ‘etcd’ service.
But I can’t…

I already have three etcd node.
Can i just put “ciphers” to etcd’s extra_args?
Is there any guide or docs about that…?

I think these links are related.

But i don’t know where can i find cluster.yaml file…
I launched rke k8s following this guide (https://rancher.com/docs/rancher/v2.x/en/cluster-provisioning/rke-clusters/custom-nodes/), I didn’t use cluster.yaml.

How to configure/apply extra_args to etcd nodes that are already running…?