K3s and RKE2 master nodes are worker node by default unless you taint them. The agent flag mainly just sets the node role to worker instead of master/control-plane/etcd. So you only need to run the k3s installer on the node once.
K3s and RKE2 master nodes are worker node by default unless you taint them. The agent flag mainly just sets the node role to worker instead of master/control-plane/etcd. So you only need to run the k3s installer on the node once.